drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/ip.h>
  20 #include <linux/tcp.h>
  21 #include <linux/mii.h>
  22 #include <linux/kthread.h>
  23 #include <linux/slab.h>
  24 #include <linux/if_vlan.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/netdev_features.h>
  27 #include <linux/skbuff.h>
  28
  29 #include <net/iucv/af_iucv.h>
  30 #include <net/dsfield.h>
  31
  32 #include <asm/ebcdic.h>
  33 #include <asm/chpid.h>
  34 #include <asm/io.h>
  35 #include <asm/sysinfo.h>
  36 #include <asm/diag.h>
  37 #include <asm/cio.h>
  38 #include <asm/ccwdev.h>
  39 #include <asm/cpcmd.h>
  40
  41 #include "qeth_core.h"
  42
  43 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  44         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  45         /*                   N  P  A    M  L  V                      H  */
  46         [QETH_DBF_SETUP] = {"qeth_setup",
  47                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  48         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  49                             &debug_sprintf_view, NULL},
  50         [QETH_DBF_CTRL]  = {"qeth_control",
  51                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  52 };
  53 EXPORT_SYMBOL_GPL(qeth_dbf);
  54
  55 struct qeth_card_list_struct qeth_core_card_list;
  56 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  57 struct kmem_cache *qeth_core_header_cache;
  58 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  59 static struct kmem_cache *qeth_qdio_outbuf_cache;
  60
  61 static struct device *qeth_core_root_dev;
  62 static struct lock_class_key qdio_out_skb_queue_key;
  63 static struct mutex qeth_mod_mutex;
  64
  65 static void qeth_send_control_data_cb(struct qeth_channel *,
  66                         struct qeth_cmd_buffer *);
  67 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  68 static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
  69 static void qeth_free_buffer_pool(struct qeth_card *);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_buffers(struct qeth_card *);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  77
  78 struct workqueue_struct *qeth_wq;
  79 EXPORT_SYMBOL_GPL(qeth_wq);
  80
  81 int qeth_card_hw_is_reachable(struct qeth_card *card)
  82 {
  83         return (card->state == CARD_STATE_SOFTSETUP) ||
  84                 (card->state == CARD_STATE_UP);
  85 }
  86 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  87
  88 static void qeth_close_dev_handler(struct work_struct *work)
  89 {
  90         struct qeth_card *card;
  91
  92         card = container_of(work, struct qeth_card, close_dev_work);
  93         QETH_CARD_TEXT(card, 2, "cldevhdl");
  94         rtnl_lock();
  95         dev_close(card->dev);
  96         rtnl_unlock();
  97         ccwgroup_set_offline(card->gdev);
  98 }
  99
 100 void qeth_close_dev(struct qeth_card *card)
 101 {
 102         QETH_CARD_TEXT(card, 2, "cldevsubm");
 103         queue_work(qeth_wq, &card->close_dev_work);
 104 }
 105 EXPORT_SYMBOL_GPL(qeth_close_dev);
 106
 107 static const char *qeth_get_cardname(struct qeth_card *card)
 108 {
 109         if (card->info.guestlan) {
 110                 switch (card->info.type) {
 111                 case QETH_CARD_TYPE_OSD:
 112                         return " Virtual NIC QDIO";
 113                 case QETH_CARD_TYPE_IQD:
 114                         return " Virtual NIC Hiper";
 115                 case QETH_CARD_TYPE_OSM:
 116                         return " Virtual NIC QDIO - OSM";
 117                 case QETH_CARD_TYPE_OSX:
 118                         return " Virtual NIC QDIO - OSX";
 119                 default:
 120                         return " unknown";
 121                 }
 122         } else {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         return " OSD Express";
 126                 case QETH_CARD_TYPE_IQD:
 127                         return " HiperSockets";
 128                 case QETH_CARD_TYPE_OSN:
 129                         return " OSN QDIO";
 130                 case QETH_CARD_TYPE_OSM:
 131                         return " OSM QDIO";
 132                 case QETH_CARD_TYPE_OSX:
 133                         return " OSX QDIO";
 134                 default:
 135                         return " unknown";
 136                 }
 137         }
 138         return " n/a";
 139 }
 140
 141 /* max length to be returned: 14 */
 142 const char *qeth_get_cardname_short(struct qeth_card *card)
 143 {
 144         if (card->info.guestlan) {
 145                 switch (card->info.type) {
 146                 case QETH_CARD_TYPE_OSD:
 147                         return "Virt.NIC QDIO";
 148                 case QETH_CARD_TYPE_IQD:
 149                         return "Virt.NIC Hiper";
 150                 case QETH_CARD_TYPE_OSM:
 151                         return "Virt.NIC OSM";
 152                 case QETH_CARD_TYPE_OSX:
 153                         return "Virt.NIC OSX";
 154                 default:
 155                         return "unknown";
 156                 }
 157         } else {
 158                 switch (card->info.type) {
 159                 case QETH_CARD_TYPE_OSD:
 160                         switch (card->info.link_type) {
 161                         case QETH_LINK_TYPE_FAST_ETH:
 162                                 return "OSD_100";
 163                         case QETH_LINK_TYPE_HSTR:
 164                                 return "HSTR";
 165                         case QETH_LINK_TYPE_GBIT_ETH:
 166                                 return "OSD_1000";
 167                         case QETH_LINK_TYPE_10GBIT_ETH:
 168                                 return "OSD_10GIG";
 169                         case QETH_LINK_TYPE_LANE_ETH100:
 170                                 return "OSD_FE_LANE";
 171                         case QETH_LINK_TYPE_LANE_TR:
 172                                 return "OSD_TR_LANE";
 173                         case QETH_LINK_TYPE_LANE_ETH1000:
 174                                 return "OSD_GbE_LANE";
 175                         case QETH_LINK_TYPE_LANE:
 176                                 return "OSD_ATM_LANE";
 177                         default:
 178                                 return "OSD_Express";
 179                         }
 180                 case QETH_CARD_TYPE_IQD:
 181                         return "HiperSockets";
 182                 case QETH_CARD_TYPE_OSN:
 183                         return "OSN";
 184                 case QETH_CARD_TYPE_OSM:
 185                         return "OSM_1000";
 186                 case QETH_CARD_TYPE_OSX:
 187                         return "OSX_10GIG";
 188                 default:
 189                         return "unknown";
 190                 }
 191         }
 192         return "n/a";
 193 }
 194
 195 void qeth_set_recovery_task(struct qeth_card *card)
 196 {
 197         card->recovery_task = current;
 198 }
 199 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 200
 201 void qeth_clear_recovery_task(struct qeth_card *card)
 202 {
 203         card->recovery_task = NULL;
 204 }
 205 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 206
 207 static bool qeth_is_recovery_task(const struct qeth_card *card)
 208 {
 209         return card->recovery_task == current;
 210 }
 211
 212 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 213                          int clear_start_mask)
 214 {
 215         unsigned long flags;
 216
 217         spin_lock_irqsave(&card->thread_mask_lock, flags);
 218         card->thread_allowed_mask = threads;
 219         if (clear_start_mask)
 220                 card->thread_start_mask &= threads;
 221         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 222         wake_up(&card->wait_q);
 223 }
 224 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 225
 226 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 227 {
 228         unsigned long flags;
 229         int rc = 0;
 230
 231         spin_lock_irqsave(&card->thread_mask_lock, flags);
 232         rc = (card->thread_running_mask & threads);
 233         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 234         return rc;
 235 }
 236 EXPORT_SYMBOL_GPL(qeth_threads_running);
 237
 238 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 239 {
 240         if (qeth_is_recovery_task(card))
 241                 return 0;
 242         return wait_event_interruptible(card->wait_q,
 243                         qeth_threads_running(card, threads) == 0);
 244 }
 245 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 246
 247 void qeth_clear_working_pool_list(struct qeth_card *card)
 248 {
 249         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 250
 251         QETH_CARD_TEXT(card, 5, "clwrklst");
 252         list_for_each_entry_safe(pool_entry, tmp,
 253                             &card->qdio.in_buf_pool.entry_list, list){
 254                         list_del(&pool_entry->list);
 255         }
 256 }
 257 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 258
 259 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 260 {
 261         struct qeth_buffer_pool_entry *pool_entry;
 262         void *ptr;
 263         int i, j;
 264
 265         QETH_CARD_TEXT(card, 5, "alocpool");
 266         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 267                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 268                 if (!pool_entry) {
 269                         qeth_free_buffer_pool(card);
 270                         return -ENOMEM;
 271                 }
 272                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 273                         ptr = (void *) __get_free_page(GFP_KERNEL);
 274                         if (!ptr) {
 275                                 while (j > 0)
 276                                         free_page((unsigned long)
 277                                                   pool_entry->elements[--j]);
 278                                 kfree(pool_entry);
 279                                 qeth_free_buffer_pool(card);
 280                                 return -ENOMEM;
 281                         }
 282                         pool_entry->elements[j] = ptr;
 283                 }
 284                 list_add(&pool_entry->init_list,
 285                          &card->qdio.init_pool.entry_list);
 286         }
 287         return 0;
 288 }
 289
 290 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 291 {
 292         QETH_CARD_TEXT(card, 2, "realcbp");
 293
 294         if ((card->state != CARD_STATE_DOWN) &&
 295             (card->state != CARD_STATE_RECOVER))
 296                 return -EPERM;
 297
 298         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 299         qeth_clear_working_pool_list(card);
 300         qeth_free_buffer_pool(card);
 301         card->qdio.in_buf_pool.buf_count = bufcnt;
 302         card->qdio.init_pool.buf_count = bufcnt;
 303         return qeth_alloc_buffer_pool(card);
 304 }
 305 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 306
 307 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 308 {
 309         if (!q)
 310                 return;
 311
 312         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 313         kfree(q);
 314 }
 315
 316 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 317 {
 318         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 319         int i;
 320
 321         if (!q)
 322                 return NULL;
 323
 324         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 325                 kfree(q);
 326                 return NULL;
 327         }
 328
 329         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 330                 q->bufs[i].buffer = q->qdio_bufs[i];
 331
 332         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 333         return q;
 334 }
 335
 336 static int qeth_cq_init(struct qeth_card *card)
 337 {
 338         int rc;
 339
 340         if (card->options.cq == QETH_CQ_ENABLED) {
 341                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 342                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 343                                    QDIO_MAX_BUFFERS_PER_Q);
 344                 card->qdio.c_q->next_buf_to_init = 127;
 345                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 346                              card->qdio.no_in_queues - 1, 0,
 347                              127);
 348                 if (rc) {
 349                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 350                         goto out;
 351                 }
 352         }
 353         rc = 0;
 354 out:
 355         return rc;
 356 }
 357
 358 static int qeth_alloc_cq(struct qeth_card *card)
 359 {
 360         int rc;
 361
 362         if (card->options.cq == QETH_CQ_ENABLED) {
 363                 int i;
 364                 struct qdio_outbuf_state *outbuf_states;
 365
 366                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 367                 card->qdio.c_q = qeth_alloc_qdio_queue();
 368                 if (!card->qdio.c_q) {
 369                         rc = -1;
 370                         goto kmsg_out;
 371                 }
 372                 card->qdio.no_in_queues = 2;
 373                 card->qdio.out_bufstates =
 374                         kcalloc(card->qdio.no_out_queues *
 375                                         QDIO_MAX_BUFFERS_PER_Q,
 376                                 sizeof(struct qdio_outbuf_state),
 377                                 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 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 enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 416                                                         int delayed)
 417 {
 418         enum iucv_tx_notify n;
 419
 420         switch (sbalf15) {
 421         case 0:
 422                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 423                 break;
 424         case 4:
 425         case 16:
 426         case 17:
 427         case 18:
 428                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 429                         TX_NOTIFY_UNREACHABLE;
 430                 break;
 431         default:
 432                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 433                         TX_NOTIFY_GENERALERROR;
 434                 break;
 435         }
 436
 437         return n;
 438 }
 439
 440 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 441                                          int forced_cleanup)
 442 {
 443         if (q->card->options.cq != QETH_CQ_ENABLED)
 444                 return;
 445
 446         if (q->bufs[bidx]->next_pending != NULL) {
 447                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 448                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 449
 450                 while (c) {
 451                         if (forced_cleanup ||
 452                             atomic_read(&c->state) ==
 453                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 454                                 struct qeth_qdio_out_buffer *f = c;
 455                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 456                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 457                                 /* release here to avoid interleaving between
 458                                    outbound tasklet and inbound tasklet
 459                                    regarding notifications and lifecycle */
 460                                 qeth_release_skbs(c);
 461
 462                                 c = f->next_pending;
 463                                 WARN_ON_ONCE(head->next_pending != f);
 464                                 head->next_pending = c;
 465                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 466                         } else {
 467                                 head = c;
 468                                 c = c->next_pending;
 469                         }
 470
 471                 }
 472         }
 473         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 474                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 475                 /* for recovery situations */
 476                 q->bufs[bidx]->aob = q->bufstates[bidx].aob;
 477                 qeth_init_qdio_out_buf(q, bidx);
 478                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 479         }
 480 }
 481
 482
 483 static void qeth_qdio_handle_aob(struct qeth_card *card,
 484                                  unsigned long phys_aob_addr)
 485 {
 486         struct qaob *aob;
 487         struct qeth_qdio_out_buffer *buffer;
 488         enum iucv_tx_notify notification;
 489         unsigned int i;
 490
 491         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 492         QETH_CARD_TEXT(card, 5, "haob");
 493         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 494         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 495         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 496
 497         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 498                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 499                 notification = TX_NOTIFY_OK;
 500         } else {
 501                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 502                                                         QETH_QDIO_BUF_PENDING);
 503                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 504                 notification = TX_NOTIFY_DELAYED_OK;
 505         }
 506
 507         if (aob->aorc != 0)  {
 508                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 509                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 510         }
 511         qeth_notify_skbs(buffer->q, buffer, notification);
 512
 513         buffer->aob = NULL;
 514         /* Free dangling allocations. The attached skbs are handled by
 515          * qeth_cleanup_handled_pending().
 516          */
 517         for (i = 0;
 518              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 519              i++) {
 520                 if (aob->sba[i] && buffer->is_header[i])
 521                         kmem_cache_free(qeth_core_header_cache,
 522                                         (void *) aob->sba[i]);
 523         }
 524         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 525
 526         qdio_release_aob(aob);
 527 }
 528
 529 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 530 {
 531         return card->options.cq == QETH_CQ_ENABLED &&
 532             card->qdio.c_q != NULL &&
 533             queue != 0 &&
 534             queue == card->qdio.no_in_queues - 1;
 535 }
 536
 537 static int __qeth_issue_next_read(struct qeth_card *card)
 538 {
 539         int rc;
 540         struct qeth_cmd_buffer *iob;
 541
 542         QETH_CARD_TEXT(card, 5, "issnxrd");
 543         if (card->read.state != CH_STATE_UP)
 544                 return -EIO;
 545         iob = qeth_get_buffer(&card->read);
 546         if (!iob) {
 547                 dev_warn(&card->gdev->dev, "The qeth device driver "
 548                         "failed to recover an error on the device\n");
 549                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 550                         "available\n", dev_name(&card->gdev->dev));
 551                 return -ENOMEM;
 552         }
 553         qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
 554         QETH_CARD_TEXT(card, 6, "noirqpnd");
 555         rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
 556                               (addr_t) iob, 0, 0);
 557         if (rc) {
 558                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 559                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 560                 atomic_set(&card->read.irq_pending, 0);
 561                 card->read_or_write_problem = 1;
 562                 qeth_schedule_recovery(card);
 563                 wake_up(&card->wait_q);
 564         }
 565         return rc;
 566 }
 567
 568 static int qeth_issue_next_read(struct qeth_card *card)
 569 {
 570         int ret;
 571
 572         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 573         ret = __qeth_issue_next_read(card);
 574         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 575
 576         return ret;
 577 }
 578
 579 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 580 {
 581         struct qeth_reply *reply;
 582
 583         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 584         if (reply) {
 585                 refcount_set(&reply->refcnt, 1);
 586                 atomic_set(&reply->received, 0);
 587                 reply->card = card;
 588         }
 589         return reply;
 590 }
 591
 592 static void qeth_get_reply(struct qeth_reply *reply)
 593 {
 594         refcount_inc(&reply->refcnt);
 595 }
 596
 597 static void qeth_put_reply(struct qeth_reply *reply)
 598 {
 599         if (refcount_dec_and_test(&reply->refcnt))
 600                 kfree(reply);
 601 }
 602
 603 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 604                 struct qeth_card *card)
 605 {
 606         char *ipa_name;
 607         int com = cmd->hdr.command;
 608         ipa_name = qeth_get_ipa_cmd_name(com);
 609         if (rc)
 610                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 611                                 "x%X \"%s\"\n",
 612                                 ipa_name, com, dev_name(&card->gdev->dev),
 613                                 QETH_CARD_IFNAME(card), rc,
 614                                 qeth_get_ipa_msg(rc));
 615         else
 616                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 617                                 ipa_name, com, dev_name(&card->gdev->dev),
 618                                 QETH_CARD_IFNAME(card));
 619 }
 620
 621 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 622                 struct qeth_cmd_buffer *iob)
 623 {
 624         struct qeth_ipa_cmd *cmd = NULL;
 625
 626         QETH_CARD_TEXT(card, 5, "chkipad");
 627         if (IS_IPA(iob->data)) {
 628                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 629                 if (IS_IPA_REPLY(cmd)) {
 630                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 631                             cmd->hdr.command != IPA_CMD_DELCCID &&
 632                             cmd->hdr.command != IPA_CMD_MODCCID &&
 633                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 634                                 qeth_issue_ipa_msg(cmd,
 635                                                 cmd->hdr.return_code, card);
 636                         return cmd;
 637                 } else {
 638                         switch (cmd->hdr.command) {
 639                         case IPA_CMD_STOPLAN:
 640                                 if (cmd->hdr.return_code ==
 641                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 642                                         dev_err(&card->gdev->dev,
 643                                            "Interface %s is down because the "
 644                                            "adjacent port is no longer in "
 645                                            "reflective relay mode\n",
 646                                            QETH_CARD_IFNAME(card));
 647                                         qeth_close_dev(card);
 648                                 } else {
 649                                         dev_warn(&card->gdev->dev,
 650                                            "The link for interface %s on CHPID"
 651                                            " 0x%X failed\n",
 652                                            QETH_CARD_IFNAME(card),
 653                                            card->info.chpid);
 654                                         qeth_issue_ipa_msg(cmd,
 655                                                 cmd->hdr.return_code, card);
 656                                 }
 657                                 card->lan_online = 0;
 658                                 if (card->dev && netif_carrier_ok(card->dev))
 659                                         netif_carrier_off(card->dev);
 660                                 return NULL;
 661                         case IPA_CMD_STARTLAN:
 662                                 dev_info(&card->gdev->dev,
 663                                            "The link for %s on CHPID 0x%X has"
 664                                            " been restored\n",
 665                                            QETH_CARD_IFNAME(card),
 666                                            card->info.chpid);
 667                                 netif_carrier_on(card->dev);
 668                                 card->lan_online = 1;
 669                                 if (card->info.hwtrap)
 670                                         card->info.hwtrap = 2;
 671                                 qeth_schedule_recovery(card);
 672                                 return NULL;
 673                         case IPA_CMD_SETBRIDGEPORT_IQD:
 674                         case IPA_CMD_SETBRIDGEPORT_OSA:
 675                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 676                                 if (card->discipline->control_event_handler
 677                                                                 (card, cmd))
 678                                         return cmd;
 679                                 else
 680                                         return NULL;
 681                         case IPA_CMD_MODCCID:
 682                                 return cmd;
 683                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 684                                 QETH_CARD_TEXT(card, 3, "irla");
 685                                 break;
 686                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 687                                 QETH_CARD_TEXT(card, 3, "urla");
 688                                 break;
 689                         default:
 690                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 691                                            "but not a reply!\n");
 692                                 break;
 693                         }
 694                 }
 695         }
 696         return cmd;
 697 }
 698
 699 void qeth_clear_ipacmd_list(struct qeth_card *card)
 700 {
 701         struct qeth_reply *reply, *r;
 702         unsigned long flags;
 703
 704         QETH_CARD_TEXT(card, 4, "clipalst");
 705
 706         spin_lock_irqsave(&card->lock, flags);
 707         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 708                 qeth_get_reply(reply);
 709                 reply->rc = -EIO;
 710                 atomic_inc(&reply->received);
 711                 list_del_init(&reply->list);
 712                 wake_up(&reply->wait_q);
 713                 qeth_put_reply(reply);
 714         }
 715         spin_unlock_irqrestore(&card->lock, flags);
 716 }
 717 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 718
 719 static int qeth_check_idx_response(struct qeth_card *card,
 720         unsigned char *buffer)
 721 {
 722         if (!buffer)
 723                 return 0;
 724
 725         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 726         if ((buffer[2] & 0xc0) == 0xc0) {
 727                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#02x\n",
 728                                  buffer[4]);
 729                 QETH_CARD_TEXT(card, 2, "ckidxres");
 730                 QETH_CARD_TEXT(card, 2, " idxterm");
 731                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 732                 if (buffer[4] == 0xf6) {
 733                         dev_err(&card->gdev->dev,
 734                         "The qeth device is not configured "
 735                         "for the OSI layer required by z/VM\n");
 736                         return -EPERM;
 737                 }
 738                 return -EIO;
 739         }
 740         return 0;
 741 }
 742
 743 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 744 {
 745         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 746                 dev_get_drvdata(&cdev->dev))->dev);
 747         return card;
 748 }
 749
 750 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
 751                 __u32 len)
 752 {
 753         struct qeth_card *card;
 754
 755         card = CARD_FROM_CDEV(channel->ccwdev);
 756         QETH_CARD_TEXT(card, 4, "setupccw");
 757         if (channel == &card->read)
 758                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
 759         else
 760                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
 761         channel->ccw.count = len;
 762         channel->ccw.cda = (__u32) __pa(iob);
 763 }
 764
 765 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 766 {
 767         __u8 index;
 768
 769         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 770         index = channel->io_buf_no;
 771         do {
 772                 if (channel->iob[index].state == BUF_STATE_FREE) {
 773                         channel->iob[index].state = BUF_STATE_LOCKED;
 774                         channel->io_buf_no = (channel->io_buf_no + 1) %
 775                                 QETH_CMD_BUFFER_NO;
 776                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 777                         return channel->iob + index;
 778                 }
 779                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 780         } while (index != channel->io_buf_no);
 781
 782         return NULL;
 783 }
 784
 785 void qeth_release_buffer(struct qeth_channel *channel,
 786                 struct qeth_cmd_buffer *iob)
 787 {
 788         unsigned long flags;
 789
 790         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 791         spin_lock_irqsave(&channel->iob_lock, flags);
 792         memset(iob->data, 0, QETH_BUFSIZE);
 793         iob->state = BUF_STATE_FREE;
 794         iob->callback = qeth_send_control_data_cb;
 795         iob->rc = 0;
 796         spin_unlock_irqrestore(&channel->iob_lock, flags);
 797         wake_up(&channel->wait_q);
 798 }
 799 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 800
 801 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 802 {
 803         struct qeth_cmd_buffer *buffer = NULL;
 804         unsigned long flags;
 805
 806         spin_lock_irqsave(&channel->iob_lock, flags);
 807         buffer = __qeth_get_buffer(channel);
 808         spin_unlock_irqrestore(&channel->iob_lock, flags);
 809         return buffer;
 810 }
 811
 812 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 813 {
 814         struct qeth_cmd_buffer *buffer;
 815         wait_event(channel->wait_q,
 816                    ((buffer = qeth_get_buffer(channel)) != NULL));
 817         return buffer;
 818 }
 819 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 820
 821 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 822 {
 823         int cnt;
 824
 825         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 826                 qeth_release_buffer(channel, &channel->iob[cnt]);
 827         channel->io_buf_no = 0;
 828 }
 829 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 830
 831 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 832                   struct qeth_cmd_buffer *iob)
 833 {
 834         struct qeth_card *card;
 835         struct qeth_reply *reply, *r;
 836         struct qeth_ipa_cmd *cmd;
 837         unsigned long flags;
 838         int keep_reply;
 839         int rc = 0;
 840
 841         card = CARD_FROM_CDEV(channel->ccwdev);
 842         QETH_CARD_TEXT(card, 4, "sndctlcb");
 843         rc = qeth_check_idx_response(card, iob->data);
 844         switch (rc) {
 845         case 0:
 846                 break;
 847         case -EIO:
 848                 qeth_clear_ipacmd_list(card);
 849                 qeth_schedule_recovery(card);
 850                 /* fall through */
 851         default:
 852                 goto out;
 853         }
 854
 855         cmd = qeth_check_ipa_data(card, iob);
 856         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 857                 goto out;
 858         /*in case of OSN : check if cmd is set */
 859         if (card->info.type == QETH_CARD_TYPE_OSN &&
 860             cmd &&
 861             cmd->hdr.command != IPA_CMD_STARTLAN &&
 862             card->osn_info.assist_cb != NULL) {
 863                 card->osn_info.assist_cb(card->dev, cmd);
 864                 goto out;
 865         }
 866
 867         spin_lock_irqsave(&card->lock, flags);
 868         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 869                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 870                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 871                         qeth_get_reply(reply);
 872                         list_del_init(&reply->list);
 873                         spin_unlock_irqrestore(&card->lock, flags);
 874                         keep_reply = 0;
 875                         if (reply->callback != NULL) {
 876                                 if (cmd) {
 877                                         reply->offset = (__u16)((char *)cmd -
 878                                                         (char *)iob->data);
 879                                         keep_reply = reply->callback(card,
 880                                                         reply,
 881                                                         (unsigned long)cmd);
 882                                 } else
 883                                         keep_reply = reply->callback(card,
 884                                                         reply,
 885                                                         (unsigned long)iob);
 886                         }
 887                         if (cmd)
 888                                 reply->rc = (u16) cmd->hdr.return_code;
 889                         else if (iob->rc)
 890                                 reply->rc = iob->rc;
 891                         if (keep_reply) {
 892                                 spin_lock_irqsave(&card->lock, flags);
 893                                 list_add_tail(&reply->list,
 894                                               &card->cmd_waiter_list);
 895                                 spin_unlock_irqrestore(&card->lock, flags);
 896                         } else {
 897                                 atomic_inc(&reply->received);
 898                                 wake_up(&reply->wait_q);
 899                         }
 900                         qeth_put_reply(reply);
 901                         goto out;
 902                 }
 903         }
 904         spin_unlock_irqrestore(&card->lock, flags);
 905 out:
 906         memcpy(&card->seqno.pdu_hdr_ack,
 907                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 908                 QETH_SEQ_NO_LENGTH);
 909         qeth_release_buffer(channel, iob);
 910 }
 911
 912 static int qeth_setup_channel(struct qeth_channel *channel)
 913 {
 914         int cnt;
 915
 916         QETH_DBF_TEXT(SETUP, 2, "setupch");
 917         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 918                 channel->iob[cnt].data =
 919                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 920                 if (channel->iob[cnt].data == NULL)
 921                         break;
 922                 channel->iob[cnt].state = BUF_STATE_FREE;
 923                 channel->iob[cnt].channel = channel;
 924                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 925                 channel->iob[cnt].rc = 0;
 926         }
 927         if (cnt < QETH_CMD_BUFFER_NO) {
 928                 while (cnt-- > 0)
 929                         kfree(channel->iob[cnt].data);
 930                 return -ENOMEM;
 931         }
 932         channel->io_buf_no = 0;
 933         atomic_set(&channel->irq_pending, 0);
 934         spin_lock_init(&channel->iob_lock);
 935
 936         init_waitqueue_head(&channel->wait_q);
 937         return 0;
 938 }
 939
 940 static int qeth_set_thread_start_bit(struct qeth_card *card,
 941                 unsigned long thread)
 942 {
 943         unsigned long flags;
 944
 945         spin_lock_irqsave(&card->thread_mask_lock, flags);
 946         if (!(card->thread_allowed_mask & thread) ||
 947               (card->thread_start_mask & thread)) {
 948                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 949                 return -EPERM;
 950         }
 951         card->thread_start_mask |= thread;
 952         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 953         return 0;
 954 }
 955
 956 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 957 {
 958         unsigned long flags;
 959
 960         spin_lock_irqsave(&card->thread_mask_lock, flags);
 961         card->thread_start_mask &= ~thread;
 962         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 963         wake_up(&card->wait_q);
 964 }
 965 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 966
 967 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 968 {
 969         unsigned long flags;
 970
 971         spin_lock_irqsave(&card->thread_mask_lock, flags);
 972         card->thread_running_mask &= ~thread;
 973         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 974         wake_up_all(&card->wait_q);
 975 }
 976 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 977
 978 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 979 {
 980         unsigned long flags;
 981         int rc = 0;
 982
 983         spin_lock_irqsave(&card->thread_mask_lock, flags);
 984         if (card->thread_start_mask & thread) {
 985                 if ((card->thread_allowed_mask & thread) &&
 986                     !(card->thread_running_mask & thread)) {
 987                         rc = 1;
 988                         card->thread_start_mask &= ~thread;
 989                         card->thread_running_mask |= thread;
 990                 } else
 991                         rc = -EPERM;
 992         }
 993         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 994         return rc;
 995 }
 996
 997 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 998 {
 999         int rc = 0;
1000
1001         wait_event(card->wait_q,
1002                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1003         return rc;
1004 }
1005 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
1006
1007 void qeth_schedule_recovery(struct qeth_card *card)
1008 {
1009         QETH_CARD_TEXT(card, 2, "startrec");
1010         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
1011                 schedule_work(&card->kernel_thread_starter);
1012 }
1013 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
1014
1015 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
1016 {
1017         int dstat, cstat;
1018         char *sense;
1019         struct qeth_card *card;
1020
1021         sense = (char *) irb->ecw;
1022         cstat = irb->scsw.cmd.cstat;
1023         dstat = irb->scsw.cmd.dstat;
1024         card = CARD_FROM_CDEV(cdev);
1025
1026         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1027                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1028                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1029                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1030                 dev_warn(&cdev->dev, "The qeth device driver "
1031                         "failed to recover an error on the device\n");
1032                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1033                         dev_name(&cdev->dev), dstat, cstat);
1034                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1035                                 16, 1, irb, 64, 1);
1036                 return 1;
1037         }
1038
1039         if (dstat & DEV_STAT_UNIT_CHECK) {
1040                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1041                     SENSE_RESETTING_EVENT_FLAG) {
1042                         QETH_CARD_TEXT(card, 2, "REVIND");
1043                         return 1;
1044                 }
1045                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1046                     SENSE_COMMAND_REJECT_FLAG) {
1047                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1048                         return 1;
1049                 }
1050                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1051                         QETH_CARD_TEXT(card, 2, "AFFE");
1052                         return 1;
1053                 }
1054                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1055                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1056                         return 0;
1057                 }
1058                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1059                         return 1;
1060         }
1061         return 0;
1062 }
1063
1064 static long __qeth_check_irb_error(struct ccw_device *cdev,
1065                 unsigned long intparm, struct irb *irb)
1066 {
1067         struct qeth_card *card;
1068
1069         card = CARD_FROM_CDEV(cdev);
1070
1071         if (!card || !IS_ERR(irb))
1072                 return 0;
1073
1074         switch (PTR_ERR(irb)) {
1075         case -EIO:
1076                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1077                         dev_name(&cdev->dev));
1078                 QETH_CARD_TEXT(card, 2, "ckirberr");
1079                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1080                 break;
1081         case -ETIMEDOUT:
1082                 dev_warn(&cdev->dev, "A hardware operation timed out"
1083                         " on the device\n");
1084                 QETH_CARD_TEXT(card, 2, "ckirberr");
1085                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1086                 if (intparm == QETH_RCD_PARM) {
1087                         if (card->data.ccwdev == cdev) {
1088                                 card->data.state = CH_STATE_DOWN;
1089                                 wake_up(&card->wait_q);
1090                         }
1091                 }
1092                 break;
1093         default:
1094                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1095                         dev_name(&cdev->dev), PTR_ERR(irb));
1096                 QETH_CARD_TEXT(card, 2, "ckirberr");
1097                 QETH_CARD_TEXT(card, 2, "  rc???");
1098         }
1099         return PTR_ERR(irb);
1100 }
1101
1102 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1103                 struct irb *irb)
1104 {
1105         int rc;
1106         int cstat, dstat;
1107         struct qeth_cmd_buffer *iob = NULL;
1108         struct qeth_channel *channel;
1109         struct qeth_card *card;
1110
1111         card = CARD_FROM_CDEV(cdev);
1112         if (!card)
1113                 return;
1114
1115         QETH_CARD_TEXT(card, 5, "irq");
1116
1117         if (card->read.ccwdev == cdev) {
1118                 channel = &card->read;
1119                 QETH_CARD_TEXT(card, 5, "read");
1120         } else if (card->write.ccwdev == cdev) {
1121                 channel = &card->write;
1122                 QETH_CARD_TEXT(card, 5, "write");
1123         } else {
1124                 channel = &card->data;
1125                 QETH_CARD_TEXT(card, 5, "data");
1126         }
1127
1128         if (qeth_intparm_is_iob(intparm))
1129                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1130
1131         if (__qeth_check_irb_error(cdev, intparm, irb)) {
1132                 /* IO was terminated, free its resources. */
1133                 if (iob)
1134                         qeth_release_buffer(iob->channel, iob);
1135                 atomic_set(&channel->irq_pending, 0);
1136                 wake_up(&card->wait_q);
1137                 return;
1138         }
1139
1140         atomic_set(&channel->irq_pending, 0);
1141
1142         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1143                 channel->state = CH_STATE_STOPPED;
1144
1145         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1146                 channel->state = CH_STATE_HALTED;
1147
1148         /*let's wake up immediately on data channel*/
1149         if ((channel == &card->data) && (intparm != 0) &&
1150             (intparm != QETH_RCD_PARM))
1151                 goto out;
1152
1153         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1154                 QETH_CARD_TEXT(card, 6, "clrchpar");
1155                 /* we don't have to handle this further */
1156                 intparm = 0;
1157         }
1158         if (intparm == QETH_HALT_CHANNEL_PARM) {
1159                 QETH_CARD_TEXT(card, 6, "hltchpar");
1160                 /* we don't have to handle this further */
1161                 intparm = 0;
1162         }
1163
1164         cstat = irb->scsw.cmd.cstat;
1165         dstat = irb->scsw.cmd.dstat;
1166
1167         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1168             (dstat & DEV_STAT_UNIT_CHECK) ||
1169             (cstat)) {
1170                 if (irb->esw.esw0.erw.cons) {
1171                         dev_warn(&channel->ccwdev->dev,
1172                                 "The qeth device driver failed to recover "
1173                                 "an error on the device\n");
1174                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1175                                 "0x%X dstat 0x%X\n",
1176                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1177                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1178                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1179                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1180                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1181                 }
1182                 if (intparm == QETH_RCD_PARM) {
1183                         channel->state = CH_STATE_DOWN;
1184                         goto out;
1185                 }
1186                 rc = qeth_get_problem(cdev, irb);
1187                 if (rc) {
1188                         card->read_or_write_problem = 1;
1189                         qeth_clear_ipacmd_list(card);
1190                         qeth_schedule_recovery(card);
1191                         goto out;
1192                 }
1193         }
1194
1195         if (intparm == QETH_RCD_PARM) {
1196                 channel->state = CH_STATE_RCD_DONE;
1197                 goto out;
1198         }
1199         if (channel == &card->data)
1200                 return;
1201         if (channel == &card->read &&
1202             channel->state == CH_STATE_UP)
1203                 __qeth_issue_next_read(card);
1204
1205         if (iob && iob->callback)
1206                 iob->callback(iob->channel, iob);
1207
1208 out:
1209         wake_up(&card->wait_q);
1210         return;
1211 }
1212
1213 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1214                 struct qeth_qdio_out_buffer *buf,
1215                 enum iucv_tx_notify notification)
1216 {
1217         struct sk_buff *skb;
1218
1219         if (skb_queue_empty(&buf->skb_list))
1220                 goto out;
1221         skb = skb_peek(&buf->skb_list);
1222         while (skb) {
1223                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1224                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1225                 if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1226                         if (skb->sk) {
1227                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1228                                 iucv->sk_txnotify(skb, notification);
1229                         }
1230                 }
1231                 if (skb_queue_is_last(&buf->skb_list, skb))
1232                         skb = NULL;
1233                 else
1234                         skb = skb_queue_next(&buf->skb_list, skb);
1235         }
1236 out:
1237         return;
1238 }
1239
1240 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1241 {
1242         struct sk_buff *skb;
1243         struct iucv_sock *iucv;
1244         int notify_general_error = 0;
1245
1246         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1247                 notify_general_error = 1;
1248
1249         /* release may never happen from within CQ tasklet scope */
1250         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1251
1252         skb = skb_dequeue(&buf->skb_list);
1253         while (skb) {
1254                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1255                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1256                 if (notify_general_error &&
1257                     be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1258                         if (skb->sk) {
1259                                 iucv = iucv_sk(skb->sk);
1260                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1261                         }
1262                 }
1263                 refcount_dec(&skb->users);
1264                 dev_kfree_skb_any(skb);
1265                 skb = skb_dequeue(&buf->skb_list);
1266         }
1267 }
1268
1269 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1270                 struct qeth_qdio_out_buffer *buf,
1271                 enum qeth_qdio_buffer_states newbufstate)
1272 {
1273         int i;
1274
1275         /* is PCI flag set on buffer? */
1276         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1277                 atomic_dec(&queue->set_pci_flags_count);
1278
1279         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1280                 qeth_release_skbs(buf);
1281         }
1282         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1283                 if (buf->buffer->element[i].addr && buf->is_header[i])
1284                         kmem_cache_free(qeth_core_header_cache,
1285                                 buf->buffer->element[i].addr);
1286                 buf->is_header[i] = 0;
1287                 buf->buffer->element[i].length = 0;
1288                 buf->buffer->element[i].addr = NULL;
1289                 buf->buffer->element[i].eflags = 0;
1290                 buf->buffer->element[i].sflags = 0;
1291         }
1292         buf->buffer->element[15].eflags = 0;
1293         buf->buffer->element[15].sflags = 0;
1294         buf->next_element_to_fill = 0;
1295         atomic_set(&buf->state, newbufstate);
1296 }
1297
1298 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1299 {
1300         int j;
1301
1302         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1303                 if (!q->bufs[j])
1304                         continue;
1305                 qeth_cleanup_handled_pending(q, j, 1);
1306                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1307                 if (free) {
1308                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1309                         q->bufs[j] = NULL;
1310                 }
1311         }
1312 }
1313
1314 void qeth_clear_qdio_buffers(struct qeth_card *card)
1315 {
1316         int i;
1317
1318         QETH_CARD_TEXT(card, 2, "clearqdbf");
1319         /* clear outbound buffers to free skbs */
1320         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1321                 if (card->qdio.out_qs[i]) {
1322                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1323                 }
1324         }
1325 }
1326 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1327
1328 static void qeth_free_buffer_pool(struct qeth_card *card)
1329 {
1330         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1331         int i = 0;
1332         list_for_each_entry_safe(pool_entry, tmp,
1333                                  &card->qdio.init_pool.entry_list, init_list){
1334                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1335                         free_page((unsigned long)pool_entry->elements[i]);
1336                 list_del(&pool_entry->init_list);
1337                 kfree(pool_entry);
1338         }
1339 }
1340
1341 static void qeth_clean_channel(struct qeth_channel *channel)
1342 {
1343         int cnt;
1344
1345         QETH_DBF_TEXT(SETUP, 2, "freech");
1346         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1347                 kfree(channel->iob[cnt].data);
1348 }
1349
1350 static void qeth_set_single_write_queues(struct qeth_card *card)
1351 {
1352         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1353             (card->qdio.no_out_queues == 4))
1354                 qeth_free_qdio_buffers(card);
1355
1356         card->qdio.no_out_queues = 1;
1357         if (card->qdio.default_out_queue != 0)
1358                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1359
1360         card->qdio.default_out_queue = 0;
1361 }
1362
1363 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1364 {
1365         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1366             (card->qdio.no_out_queues == 1)) {
1367                 qeth_free_qdio_buffers(card);
1368                 card->qdio.default_out_queue = 2;
1369         }
1370         card->qdio.no_out_queues = 4;
1371 }
1372
1373 static void qeth_update_from_chp_desc(struct qeth_card *card)
1374 {
1375         struct ccw_device *ccwdev;
1376         struct channel_path_desc_fmt0 *chp_dsc;
1377
1378         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1379
1380         ccwdev = card->data.ccwdev;
1381         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1382         if (!chp_dsc)
1383                 goto out;
1384
1385         card->info.func_level = 0x4100 + chp_dsc->desc;
1386         if (card->info.type == QETH_CARD_TYPE_IQD)
1387                 goto out;
1388
1389         /* CHPP field bit 6 == 1 -> single queue */
1390         if ((chp_dsc->chpp & 0x02) == 0x02)
1391                 qeth_set_single_write_queues(card);
1392         else
1393                 qeth_set_multiple_write_queues(card);
1394 out:
1395         kfree(chp_dsc);
1396         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1397         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1398 }
1399
1400 static void qeth_init_qdio_info(struct qeth_card *card)
1401 {
1402         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1403         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1404         /* inbound */
1405         card->qdio.no_in_queues = 1;
1406         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1407         if (card->info.type == QETH_CARD_TYPE_IQD)
1408                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1409         else
1410                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1411         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1412         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1413         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1414 }
1415
1416 static void qeth_set_intial_options(struct qeth_card *card)
1417 {
1418         card->options.route4.type = NO_ROUTER;
1419         card->options.route6.type = NO_ROUTER;
1420         card->options.fake_broadcast = 0;
1421         card->options.performance_stats = 0;
1422         card->options.rx_sg_cb = QETH_RX_SG_CB;
1423         card->options.isolation = ISOLATION_MODE_NONE;
1424         card->options.cq = QETH_CQ_DISABLED;
1425 }
1426
1427 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1428 {
1429         unsigned long flags;
1430         int rc = 0;
1431
1432         spin_lock_irqsave(&card->thread_mask_lock, flags);
1433         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1434                         (u8) card->thread_start_mask,
1435                         (u8) card->thread_allowed_mask,
1436                         (u8) card->thread_running_mask);
1437         rc = (card->thread_start_mask & thread);
1438         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1439         return rc;
1440 }
1441
1442 static void qeth_start_kernel_thread(struct work_struct *work)
1443 {
1444         struct task_struct *ts;
1445         struct qeth_card *card = container_of(work, struct qeth_card,
1446                                         kernel_thread_starter);
1447         QETH_CARD_TEXT(card , 2, "strthrd");
1448
1449         if (card->read.state != CH_STATE_UP &&
1450             card->write.state != CH_STATE_UP)
1451                 return;
1452         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1453                 ts = kthread_run(card->discipline->recover, (void *)card,
1454                                 "qeth_recover");
1455                 if (IS_ERR(ts)) {
1456                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1457                         qeth_clear_thread_running_bit(card,
1458                                 QETH_RECOVER_THREAD);
1459                 }
1460         }
1461 }
1462
1463 static void qeth_buffer_reclaim_work(struct work_struct *);
1464 static int qeth_setup_card(struct qeth_card *card)
1465 {
1466
1467         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1468         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1469
1470         card->read.state  = CH_STATE_DOWN;
1471         card->write.state = CH_STATE_DOWN;
1472         card->data.state  = CH_STATE_DOWN;
1473         card->state = CARD_STATE_DOWN;
1474         card->lan_online = 0;
1475         card->read_or_write_problem = 0;
1476         card->dev = NULL;
1477         spin_lock_init(&card->mclock);
1478         spin_lock_init(&card->lock);
1479         spin_lock_init(&card->ip_lock);
1480         spin_lock_init(&card->thread_mask_lock);
1481         mutex_init(&card->conf_mutex);
1482         mutex_init(&card->discipline_mutex);
1483         mutex_init(&card->vid_list_mutex);
1484         card->thread_start_mask = 0;
1485         card->thread_allowed_mask = 0;
1486         card->thread_running_mask = 0;
1487         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1488         INIT_LIST_HEAD(&card->cmd_waiter_list);
1489         init_waitqueue_head(&card->wait_q);
1490         /* initial options */
1491         qeth_set_intial_options(card);
1492         /* IP address takeover */
1493         INIT_LIST_HEAD(&card->ipato.entries);
1494         card->ipato.enabled = false;
1495         card->ipato.invert4 = false;
1496         card->ipato.invert6 = false;
1497         /* init QDIO stuff */
1498         qeth_init_qdio_info(card);
1499         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1500         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1501         return 0;
1502 }
1503
1504 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1505 {
1506         struct qeth_card *card = container_of(slr, struct qeth_card,
1507                                         qeth_service_level);
1508         if (card->info.mcl_level[0])
1509                 seq_printf(m, "qeth: %s firmware level %s\n",
1510                         CARD_BUS_ID(card), card->info.mcl_level);
1511 }
1512
1513 static struct qeth_card *qeth_alloc_card(void)
1514 {
1515         struct qeth_card *card;
1516
1517         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1518         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1519         if (!card)
1520                 goto out;
1521         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1522         if (qeth_setup_channel(&card->read))
1523                 goto out_ip;
1524         if (qeth_setup_channel(&card->write))
1525                 goto out_channel;
1526         card->options.layer2 = -1;
1527         card->qeth_service_level.seq_print = qeth_core_sl_print;
1528         register_service_level(&card->qeth_service_level);
1529         return card;
1530
1531 out_channel:
1532         qeth_clean_channel(&card->read);
1533 out_ip:
1534         kfree(card);
1535 out:
1536         return NULL;
1537 }
1538
1539 static void qeth_determine_card_type(struct qeth_card *card)
1540 {
1541         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1542
1543         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1544         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1545         card->info.type = CARD_RDEV(card)->id.driver_info;
1546         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1547         if (card->info.type == QETH_CARD_TYPE_IQD)
1548                 card->info.is_multicast_different = 0x0103;
1549         qeth_update_from_chp_desc(card);
1550 }
1551
1552 static int qeth_clear_channel(struct qeth_channel *channel)
1553 {
1554         unsigned long flags;
1555         struct qeth_card *card;
1556         int rc;
1557
1558         card = CARD_FROM_CDEV(channel->ccwdev);
1559         QETH_CARD_TEXT(card, 3, "clearch");
1560         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1561         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1562         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1563
1564         if (rc)
1565                 return rc;
1566         rc = wait_event_interruptible_timeout(card->wait_q,
1567                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1568         if (rc == -ERESTARTSYS)
1569                 return rc;
1570         if (channel->state != CH_STATE_STOPPED)
1571                 return -ETIME;
1572         channel->state = CH_STATE_DOWN;
1573         return 0;
1574 }
1575
1576 static int qeth_halt_channel(struct qeth_channel *channel)
1577 {
1578         unsigned long flags;
1579         struct qeth_card *card;
1580         int rc;
1581
1582         card = CARD_FROM_CDEV(channel->ccwdev);
1583         QETH_CARD_TEXT(card, 3, "haltch");
1584         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1585         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1586         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1587
1588         if (rc)
1589                 return rc;
1590         rc = wait_event_interruptible_timeout(card->wait_q,
1591                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1592         if (rc == -ERESTARTSYS)
1593                 return rc;
1594         if (channel->state != CH_STATE_HALTED)
1595                 return -ETIME;
1596         return 0;
1597 }
1598
1599 static int qeth_halt_channels(struct qeth_card *card)
1600 {
1601         int rc1 = 0, rc2 = 0, rc3 = 0;
1602
1603         QETH_CARD_TEXT(card, 3, "haltchs");
1604         rc1 = qeth_halt_channel(&card->read);
1605         rc2 = qeth_halt_channel(&card->write);
1606         rc3 = qeth_halt_channel(&card->data);
1607         if (rc1)
1608                 return rc1;
1609         if (rc2)
1610                 return rc2;
1611         return rc3;
1612 }
1613
1614 static int qeth_clear_channels(struct qeth_card *card)
1615 {
1616         int rc1 = 0, rc2 = 0, rc3 = 0;
1617
1618         QETH_CARD_TEXT(card, 3, "clearchs");
1619         rc1 = qeth_clear_channel(&card->read);
1620         rc2 = qeth_clear_channel(&card->write);
1621         rc3 = qeth_clear_channel(&card->data);
1622         if (rc1)
1623                 return rc1;
1624         if (rc2)
1625                 return rc2;
1626         return rc3;
1627 }
1628
1629 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1630 {
1631         int rc = 0;
1632
1633         QETH_CARD_TEXT(card, 3, "clhacrd");
1634
1635         if (halt)
1636                 rc = qeth_halt_channels(card);
1637         if (rc)
1638                 return rc;
1639         return qeth_clear_channels(card);
1640 }
1641
1642 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1643 {
1644         int rc = 0;
1645
1646         QETH_CARD_TEXT(card, 3, "qdioclr");
1647         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1648                 QETH_QDIO_CLEANING)) {
1649         case QETH_QDIO_ESTABLISHED:
1650                 if (card->info.type == QETH_CARD_TYPE_IQD)
1651                         rc = qdio_shutdown(CARD_DDEV(card),
1652                                 QDIO_FLAG_CLEANUP_USING_HALT);
1653                 else
1654                         rc = qdio_shutdown(CARD_DDEV(card),
1655                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1656                 if (rc)
1657                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1658                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1659                 break;
1660         case QETH_QDIO_CLEANING:
1661                 return rc;
1662         default:
1663                 break;
1664         }
1665         rc = qeth_clear_halt_card(card, use_halt);
1666         if (rc)
1667                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1668         card->state = CARD_STATE_DOWN;
1669         return rc;
1670 }
1671 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1672
1673 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1674                                int *length)
1675 {
1676         struct ciw *ciw;
1677         char *rcd_buf;
1678         int ret;
1679         struct qeth_channel *channel = &card->data;
1680         unsigned long flags;
1681
1682         /*
1683          * scan for RCD command in extended SenseID data
1684          */
1685         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1686         if (!ciw || ciw->cmd == 0)
1687                 return -EOPNOTSUPP;
1688         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1689         if (!rcd_buf)
1690                 return -ENOMEM;
1691
1692         channel->ccw.cmd_code = ciw->cmd;
1693         channel->ccw.cda = (__u32) __pa(rcd_buf);
1694         channel->ccw.count = ciw->count;
1695         channel->ccw.flags = CCW_FLAG_SLI;
1696         channel->state = CH_STATE_RCD;
1697         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1698         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1699                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1700                                        QETH_RCD_TIMEOUT);
1701         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1702         if (!ret)
1703                 wait_event(card->wait_q,
1704                            (channel->state == CH_STATE_RCD_DONE ||
1705                             channel->state == CH_STATE_DOWN));
1706         if (channel->state == CH_STATE_DOWN)
1707                 ret = -EIO;
1708         else
1709                 channel->state = CH_STATE_DOWN;
1710         if (ret) {
1711                 kfree(rcd_buf);
1712                 *buffer = NULL;
1713                 *length = 0;
1714         } else {
1715                 *length = ciw->count;
1716                 *buffer = rcd_buf;
1717         }
1718         return ret;
1719 }
1720
1721 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1722 {
1723         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1724         card->info.chpid = prcd[30];
1725         card->info.unit_addr2 = prcd[31];
1726         card->info.cula = prcd[63];
1727         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1728                                (prcd[0x11] == _ascebc['M']));
1729 }
1730
1731 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1732 {
1733         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1734         struct diag26c_vnic_resp *response = NULL;
1735         struct diag26c_vnic_req *request = NULL;
1736         struct ccw_dev_id id;
1737         char userid[80];
1738         int rc = 0;
1739
1740         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1741
1742         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1743         if (rc)
1744                 goto out;
1745
1746         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1747         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1748         if (!request || !response) {
1749                 rc = -ENOMEM;
1750                 goto out;
1751         }
1752
1753         ccw_device_get_id(CARD_RDEV(card), &id);
1754         request->resp_buf_len = sizeof(*response);
1755         request->resp_version = DIAG26C_VERSION6_VM65918;
1756         request->req_format = DIAG26C_VNIC_INFO;
1757         ASCEBC(userid, 8);
1758         memcpy(&request->sys_name, userid, 8);
1759         request->devno = id.devno;
1760
1761         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1762         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1763         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1764         if (rc)
1765                 goto out;
1766         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1767
1768         if (request->resp_buf_len < sizeof(*response) ||
1769             response->version != request->resp_version) {
1770                 rc = -EIO;
1771                 goto out;
1772         }
1773
1774         if (response->protocol == VNIC_INFO_PROT_L2)
1775                 disc = QETH_DISCIPLINE_LAYER2;
1776         else if (response->protocol == VNIC_INFO_PROT_L3)
1777                 disc = QETH_DISCIPLINE_LAYER3;
1778
1779 out:
1780         kfree(response);
1781         kfree(request);
1782         if (rc)
1783                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1784         return disc;
1785 }
1786
1787 /* Determine whether the device requires a specific layer discipline */
1788 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1789 {
1790         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1791
1792         if (card->info.type == QETH_CARD_TYPE_OSM ||
1793             card->info.type == QETH_CARD_TYPE_OSN)
1794                 disc = QETH_DISCIPLINE_LAYER2;
1795         else if (card->info.guestlan)
1796                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1797                                 QETH_DISCIPLINE_LAYER3 :
1798                                 qeth_vm_detect_layer(card);
1799
1800         switch (disc) {
1801         case QETH_DISCIPLINE_LAYER2:
1802                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1803                 break;
1804         case QETH_DISCIPLINE_LAYER3:
1805                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1806                 break;
1807         default:
1808                 QETH_DBF_TEXT(SETUP, 3, "force no");
1809         }
1810
1811         return disc;
1812 }
1813
1814 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1815 {
1816         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1817
1818         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1819             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1820                 card->info.blkt.time_total = 0;
1821                 card->info.blkt.inter_packet = 0;
1822                 card->info.blkt.inter_packet_jumbo = 0;
1823         } else {
1824                 card->info.blkt.time_total = 250;
1825                 card->info.blkt.inter_packet = 5;
1826                 card->info.blkt.inter_packet_jumbo = 15;
1827         }
1828 }
1829
1830 static void qeth_init_tokens(struct qeth_card *card)
1831 {
1832         card->token.issuer_rm_w = 0x00010103UL;
1833         card->token.cm_filter_w = 0x00010108UL;
1834         card->token.cm_connection_w = 0x0001010aUL;
1835         card->token.ulp_filter_w = 0x0001010bUL;
1836         card->token.ulp_connection_w = 0x0001010dUL;
1837 }
1838
1839 static void qeth_init_func_level(struct qeth_card *card)
1840 {
1841         switch (card->info.type) {
1842         case QETH_CARD_TYPE_IQD:
1843                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1844                 break;
1845         case QETH_CARD_TYPE_OSD:
1846         case QETH_CARD_TYPE_OSN:
1847                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1848                 break;
1849         default:
1850                 break;
1851         }
1852 }
1853
1854 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1855                 void (*idx_reply_cb)(struct qeth_channel *,
1856                         struct qeth_cmd_buffer *))
1857 {
1858         struct qeth_cmd_buffer *iob;
1859         unsigned long flags;
1860         int rc;
1861         struct qeth_card *card;
1862
1863         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1864         card = CARD_FROM_CDEV(channel->ccwdev);
1865         iob = qeth_get_buffer(channel);
1866         if (!iob)
1867                 return -ENOMEM;
1868         iob->callback = idx_reply_cb;
1869         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1870         channel->ccw.count = QETH_BUFSIZE;
1871         channel->ccw.cda = (__u32) __pa(iob->data);
1872
1873         wait_event(card->wait_q,
1874                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1875         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1876         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1877         rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1878                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1879         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1880
1881         if (rc) {
1882                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1883                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1884                 atomic_set(&channel->irq_pending, 0);
1885                 wake_up(&card->wait_q);
1886                 return rc;
1887         }
1888         rc = wait_event_interruptible_timeout(card->wait_q,
1889                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1890         if (rc == -ERESTARTSYS)
1891                 return rc;
1892         if (channel->state != CH_STATE_UP) {
1893                 rc = -ETIME;
1894                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1895         } else
1896                 rc = 0;
1897         return rc;
1898 }
1899
1900 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1901                 void (*idx_reply_cb)(struct qeth_channel *,
1902                         struct qeth_cmd_buffer *))
1903 {
1904         struct qeth_card *card;
1905         struct qeth_cmd_buffer *iob;
1906         unsigned long flags;
1907         __u16 temp;
1908         __u8 tmp;
1909         int rc;
1910         struct ccw_dev_id temp_devid;
1911
1912         card = CARD_FROM_CDEV(channel->ccwdev);
1913
1914         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1915
1916         iob = qeth_get_buffer(channel);
1917         if (!iob)
1918                 return -ENOMEM;
1919         iob->callback = idx_reply_cb;
1920         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1921         channel->ccw.count = IDX_ACTIVATE_SIZE;
1922         channel->ccw.cda = (__u32) __pa(iob->data);
1923         if (channel == &card->write) {
1924                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1925                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1926                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1927                 card->seqno.trans_hdr++;
1928         } else {
1929                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1930                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1931                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1932         }
1933         tmp = ((__u8)card->info.portno) | 0x80;
1934         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1935         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1936                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1937         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1938                &card->info.func_level, sizeof(__u16));
1939         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1940         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1941         temp = (card->info.cula << 8) + card->info.unit_addr2;
1942         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1943
1944         wait_event(card->wait_q,
1945                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1946         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1947         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1948         rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1949                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1950         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1951
1952         if (rc) {
1953                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1954                         rc);
1955                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1956                 atomic_set(&channel->irq_pending, 0);
1957                 wake_up(&card->wait_q);
1958                 return rc;
1959         }
1960         rc = wait_event_interruptible_timeout(card->wait_q,
1961                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1962         if (rc == -ERESTARTSYS)
1963                 return rc;
1964         if (channel->state != CH_STATE_ACTIVATING) {
1965                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1966                         " failed to recover an error on the device\n");
1967                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1968                         dev_name(&channel->ccwdev->dev));
1969                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1970                 return -ETIME;
1971         }
1972         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1973 }
1974
1975 static int qeth_peer_func_level(int level)
1976 {
1977         if ((level & 0xff) == 8)
1978                 return (level & 0xff) + 0x400;
1979         if (((level >> 8) & 3) == 1)
1980                 return (level & 0xff) + 0x200;
1981         return level;
1982 }
1983
1984 static void qeth_idx_write_cb(struct qeth_channel *channel,
1985                 struct qeth_cmd_buffer *iob)
1986 {
1987         struct qeth_card *card;
1988         __u16 temp;
1989
1990         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1991
1992         if (channel->state == CH_STATE_DOWN) {
1993                 channel->state = CH_STATE_ACTIVATING;
1994                 goto out;
1995         }
1996         card = CARD_FROM_CDEV(channel->ccwdev);
1997
1998         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1999                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
2000                         dev_err(&card->write.ccwdev->dev,
2001                                 "The adapter is used exclusively by another "
2002                                 "host\n");
2003                 else
2004                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
2005                                 " negative reply\n",
2006                                 dev_name(&card->write.ccwdev->dev));
2007                 goto out;
2008         }
2009         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2010         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
2011                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
2012                         "function level mismatch (sent: 0x%x, received: "
2013                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
2014                         card->info.func_level, temp);
2015                 goto out;
2016         }
2017         channel->state = CH_STATE_UP;
2018 out:
2019         qeth_release_buffer(channel, iob);
2020 }
2021
2022 static void qeth_idx_read_cb(struct qeth_channel *channel,
2023                 struct qeth_cmd_buffer *iob)
2024 {
2025         struct qeth_card *card;
2026         __u16 temp;
2027
2028         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
2029         if (channel->state == CH_STATE_DOWN) {
2030                 channel->state = CH_STATE_ACTIVATING;
2031                 goto out;
2032         }
2033
2034         card = CARD_FROM_CDEV(channel->ccwdev);
2035         if (qeth_check_idx_response(card, iob->data))
2036                         goto out;
2037
2038         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2039                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2040                 case QETH_IDX_ACT_ERR_EXCL:
2041                         dev_err(&card->write.ccwdev->dev,
2042                                 "The adapter is used exclusively by another "
2043                                 "host\n");
2044                         break;
2045                 case QETH_IDX_ACT_ERR_AUTH:
2046                 case QETH_IDX_ACT_ERR_AUTH_USER:
2047                         dev_err(&card->read.ccwdev->dev,
2048                                 "Setting the device online failed because of "
2049                                 "insufficient authorization\n");
2050                         break;
2051                 default:
2052                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2053                                 " negative reply\n",
2054                                 dev_name(&card->read.ccwdev->dev));
2055                 }
2056                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2057                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2058                 goto out;
2059         }
2060
2061         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2062         if (temp != qeth_peer_func_level(card->info.func_level)) {
2063                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2064                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2065                         dev_name(&card->read.ccwdev->dev),
2066                         card->info.func_level, temp);
2067                 goto out;
2068         }
2069         memcpy(&card->token.issuer_rm_r,
2070                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2071                QETH_MPC_TOKEN_LENGTH);
2072         memcpy(&card->info.mcl_level[0],
2073                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2074         channel->state = CH_STATE_UP;
2075 out:
2076         qeth_release_buffer(channel, iob);
2077 }
2078
2079 void qeth_prepare_control_data(struct qeth_card *card, int len,
2080                 struct qeth_cmd_buffer *iob)
2081 {
2082         qeth_setup_ccw(&card->write, iob->data, len);
2083         iob->callback = qeth_release_buffer;
2084
2085         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2086                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2087         card->seqno.trans_hdr++;
2088         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2089                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2090         card->seqno.pdu_hdr++;
2091         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2092                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2093         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2094 }
2095 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2096
2097 /**
2098  * qeth_send_control_data() -   send control command to the card
2099  * @card:                       qeth_card structure pointer
2100  * @len:                        size of the command buffer
2101  * @iob:                        qeth_cmd_buffer pointer
2102  * @reply_cb:                   callback function pointer
2103  * @cb_card:                    pointer to the qeth_card structure
2104  * @cb_reply:                   pointer to the qeth_reply structure
2105  * @cb_cmd:                     pointer to the original iob for non-IPA
2106  *                              commands, or to the qeth_ipa_cmd structure
2107  *                              for the IPA commands.
2108  * @reply_param:                private pointer passed to the callback
2109  *
2110  * Returns the value of the `return_code' field of the response
2111  * block returned from the hardware, or other error indication.
2112  * Value of zero indicates successful execution of the command.
2113  *
2114  * Callback function gets called one or more times, with cb_cmd
2115  * pointing to the response returned by the hardware. Callback
2116  * function must return non-zero if more reply blocks are expected,
2117  * and zero if the last or only reply block is received. Callback
2118  * function can get the value of the reply_param pointer from the
2119  * field 'param' of the structure qeth_reply.
2120  */
2121
2122 int qeth_send_control_data(struct qeth_card *card, int len,
2123                 struct qeth_cmd_buffer *iob,
2124                 int (*reply_cb)(struct qeth_card *cb_card,
2125                                 struct qeth_reply *cb_reply,
2126                                 unsigned long cb_cmd),
2127                 void *reply_param)
2128 {
2129         int rc;
2130         unsigned long flags;
2131         struct qeth_reply *reply = NULL;
2132         unsigned long timeout, event_timeout;
2133         struct qeth_ipa_cmd *cmd = NULL;
2134
2135         QETH_CARD_TEXT(card, 2, "sendctl");
2136
2137         if (card->read_or_write_problem) {
2138                 qeth_release_buffer(iob->channel, iob);
2139                 return -EIO;
2140         }
2141         reply = qeth_alloc_reply(card);
2142         if (!reply) {
2143                 return -ENOMEM;
2144         }
2145         reply->callback = reply_cb;
2146         reply->param = reply_param;
2147
2148         init_waitqueue_head(&reply->wait_q);
2149
2150         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2151
2152         if (IS_IPA(iob->data)) {
2153                 cmd = __ipa_cmd(iob);
2154                 cmd->hdr.seqno = card->seqno.ipa++;
2155                 reply->seqno = cmd->hdr.seqno;
2156                 event_timeout = QETH_IPA_TIMEOUT;
2157         } else {
2158                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2159                 event_timeout = QETH_TIMEOUT;
2160         }
2161         qeth_prepare_control_data(card, len, iob);
2162
2163         spin_lock_irqsave(&card->lock, flags);
2164         list_add_tail(&reply->list, &card->cmd_waiter_list);
2165         spin_unlock_irqrestore(&card->lock, flags);
2166
2167         timeout = jiffies + event_timeout;
2168
2169         QETH_CARD_TEXT(card, 6, "noirqpnd");
2170         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2171         rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
2172                                       (addr_t) iob, 0, 0, event_timeout);
2173         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2174         if (rc) {
2175                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2176                         "ccw_device_start rc = %i\n",
2177                         dev_name(&card->write.ccwdev->dev), rc);
2178                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2179                 spin_lock_irqsave(&card->lock, flags);
2180                 list_del_init(&reply->list);
2181                 qeth_put_reply(reply);
2182                 spin_unlock_irqrestore(&card->lock, flags);
2183                 qeth_release_buffer(iob->channel, iob);
2184                 atomic_set(&card->write.irq_pending, 0);
2185                 wake_up(&card->wait_q);
2186                 return rc;
2187         }
2188
2189         /* we have only one long running ipassist, since we can ensure
2190            process context of this command we can sleep */
2191         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2192             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2193                 if (!wait_event_timeout(reply->wait_q,
2194                     atomic_read(&reply->received), event_timeout))
2195                         goto time_err;
2196         } else {
2197                 while (!atomic_read(&reply->received)) {
2198                         if (time_after(jiffies, timeout))
2199                                 goto time_err;
2200                         cpu_relax();
2201                 }
2202         }
2203
2204         rc = reply->rc;
2205         qeth_put_reply(reply);
2206         return rc;
2207
2208 time_err:
2209         reply->rc = -ETIME;
2210         spin_lock_irqsave(&reply->card->lock, flags);
2211         list_del_init(&reply->list);
2212         spin_unlock_irqrestore(&reply->card->lock, flags);
2213         atomic_inc(&reply->received);
2214         rc = reply->rc;
2215         qeth_put_reply(reply);
2216         return rc;
2217 }
2218 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2219
2220 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2221                 unsigned long data)
2222 {
2223         struct qeth_cmd_buffer *iob;
2224
2225         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2226
2227         iob = (struct qeth_cmd_buffer *) data;
2228         memcpy(&card->token.cm_filter_r,
2229                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2230                QETH_MPC_TOKEN_LENGTH);
2231         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2232         return 0;
2233 }
2234
2235 static int qeth_cm_enable(struct qeth_card *card)
2236 {
2237         int rc;
2238         struct qeth_cmd_buffer *iob;
2239
2240         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2241
2242         iob = qeth_wait_for_buffer(&card->write);
2243         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2244         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2245                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2246         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2247                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2248
2249         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2250                                     qeth_cm_enable_cb, NULL);
2251         return rc;
2252 }
2253
2254 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2255                 unsigned long data)
2256 {
2257
2258         struct qeth_cmd_buffer *iob;
2259
2260         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2261
2262         iob = (struct qeth_cmd_buffer *) data;
2263         memcpy(&card->token.cm_connection_r,
2264                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2265                QETH_MPC_TOKEN_LENGTH);
2266         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2267         return 0;
2268 }
2269
2270 static int qeth_cm_setup(struct qeth_card *card)
2271 {
2272         int rc;
2273         struct qeth_cmd_buffer *iob;
2274
2275         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2276
2277         iob = qeth_wait_for_buffer(&card->write);
2278         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2279         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2280                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2281         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2282                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2283         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2284                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2285         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2286                                     qeth_cm_setup_cb, NULL);
2287         return rc;
2288
2289 }
2290
2291 static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2292 {
2293         switch (card->info.type) {
2294         case QETH_CARD_TYPE_IQD:
2295                 return card->info.max_mtu;
2296         case QETH_CARD_TYPE_OSD:
2297         case QETH_CARD_TYPE_OSX:
2298                 if (!card->options.layer2)
2299                         return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */
2300                 /* fall through */
2301         default:
2302                 return ETH_DATA_LEN;
2303         }
2304 }
2305
2306 static int qeth_get_mtu_outof_framesize(int framesize)
2307 {
2308         switch (framesize) {
2309         case 0x4000:
2310                 return 8192;
2311         case 0x6000:
2312                 return 16384;
2313         case 0xa000:
2314                 return 32768;
2315         case 0xffff:
2316                 return 57344;
2317         default:
2318                 return 0;
2319         }
2320 }
2321
2322 static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2323 {
2324         switch (card->info.type) {
2325         case QETH_CARD_TYPE_OSD:
2326         case QETH_CARD_TYPE_OSM:
2327         case QETH_CARD_TYPE_OSX:
2328         case QETH_CARD_TYPE_IQD:
2329                 return ((mtu >= 576) &&
2330                         (mtu <= card->info.max_mtu));
2331         case QETH_CARD_TYPE_OSN:
2332         default:
2333                 return 1;
2334         }
2335 }
2336
2337 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2338                 unsigned long data)
2339 {
2340
2341         __u16 mtu, framesize;
2342         __u16 len;
2343         __u8 link_type;
2344         struct qeth_cmd_buffer *iob;
2345
2346         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2347
2348         iob = (struct qeth_cmd_buffer *) data;
2349         memcpy(&card->token.ulp_filter_r,
2350                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2351                QETH_MPC_TOKEN_LENGTH);
2352         if (card->info.type == QETH_CARD_TYPE_IQD) {
2353                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2354                 mtu = qeth_get_mtu_outof_framesize(framesize);
2355                 if (!mtu) {
2356                         iob->rc = -EINVAL;
2357                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2358                         return 0;
2359                 }
2360                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2361                         /* frame size has changed */
2362                         if (card->dev &&
2363                             ((card->dev->mtu == card->info.initial_mtu) ||
2364                              (card->dev->mtu > mtu)))
2365                                 card->dev->mtu = mtu;
2366                         qeth_free_qdio_buffers(card);
2367                 }
2368                 card->info.initial_mtu = mtu;
2369                 card->info.max_mtu = mtu;
2370                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2371         } else {
2372                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2373                         iob->data);
2374                 card->info.initial_mtu = min(card->info.max_mtu,
2375                                         qeth_get_initial_mtu_for_card(card));
2376                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2377         }
2378
2379         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2380         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2381                 memcpy(&link_type,
2382                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2383                 card->info.link_type = link_type;
2384         } else
2385                 card->info.link_type = 0;
2386         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2387         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2388         return 0;
2389 }
2390
2391 static int qeth_ulp_enable(struct qeth_card *card)
2392 {
2393         int rc;
2394         char prot_type;
2395         struct qeth_cmd_buffer *iob;
2396
2397         /*FIXME: trace view callbacks*/
2398         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2399
2400         iob = qeth_wait_for_buffer(&card->write);
2401         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2402
2403         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2404                 (__u8) card->info.portno;
2405         if (card->options.layer2)
2406                 if (card->info.type == QETH_CARD_TYPE_OSN)
2407                         prot_type = QETH_PROT_OSN2;
2408                 else
2409                         prot_type = QETH_PROT_LAYER2;
2410         else
2411                 prot_type = QETH_PROT_TCPIP;
2412
2413         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2414         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2415                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2416         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2417                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2418         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2419                                     qeth_ulp_enable_cb, NULL);
2420         return rc;
2421
2422 }
2423
2424 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2425                 unsigned long data)
2426 {
2427         struct qeth_cmd_buffer *iob;
2428
2429         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2430
2431         iob = (struct qeth_cmd_buffer *) data;
2432         memcpy(&card->token.ulp_connection_r,
2433                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2434                QETH_MPC_TOKEN_LENGTH);
2435         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2436                      3)) {
2437                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2438                 dev_err(&card->gdev->dev, "A connection could not be "
2439                         "established because of an OLM limit\n");
2440                 iob->rc = -EMLINK;
2441         }
2442         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2443         return 0;
2444 }
2445
2446 static int qeth_ulp_setup(struct qeth_card *card)
2447 {
2448         int rc;
2449         __u16 temp;
2450         struct qeth_cmd_buffer *iob;
2451         struct ccw_dev_id dev_id;
2452
2453         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2454
2455         iob = qeth_wait_for_buffer(&card->write);
2456         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2457
2458         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2459                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2460         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2461                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2462         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2463                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2464
2465         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2466         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2467         temp = (card->info.cula << 8) + card->info.unit_addr2;
2468         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2469         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2470                                     qeth_ulp_setup_cb, NULL);
2471         return rc;
2472 }
2473
2474 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2475 {
2476         int rc;
2477         struct qeth_qdio_out_buffer *newbuf;
2478
2479         rc = 0;
2480         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2481         if (!newbuf) {
2482                 rc = -ENOMEM;
2483                 goto out;
2484         }
2485         newbuf->buffer = q->qdio_bufs[bidx];
2486         skb_queue_head_init(&newbuf->skb_list);
2487         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2488         newbuf->q = q;
2489         newbuf->aob = NULL;
2490         newbuf->next_pending = q->bufs[bidx];
2491         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2492         q->bufs[bidx] = newbuf;
2493         if (q->bufstates) {
2494                 q->bufstates[bidx].user = newbuf;
2495                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2496                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2497                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2498                                 (long) newbuf->next_pending);
2499         }
2500 out:
2501         return rc;
2502 }
2503
2504 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2505 {
2506         if (!q)
2507                 return;
2508
2509         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2510         kfree(q);
2511 }
2512
2513 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2514 {
2515         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2516
2517         if (!q)
2518                 return NULL;
2519
2520         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2521                 kfree(q);
2522                 return NULL;
2523         }
2524         return q;
2525 }
2526
2527 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2528 {
2529         int i, j;
2530
2531         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2532
2533         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2534                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2535                 return 0;
2536
2537         QETH_DBF_TEXT(SETUP, 2, "inq");
2538         card->qdio.in_q = qeth_alloc_qdio_queue();
2539         if (!card->qdio.in_q)
2540                 goto out_nomem;
2541
2542         /* inbound buffer pool */
2543         if (qeth_alloc_buffer_pool(card))
2544                 goto out_freeinq;
2545
2546         /* outbound */
2547         card->qdio.out_qs =
2548                 kcalloc(card->qdio.no_out_queues,
2549                         sizeof(struct qeth_qdio_out_q *),
2550                         GFP_KERNEL);
2551         if (!card->qdio.out_qs)
2552                 goto out_freepool;
2553         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2554                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2555                 if (!card->qdio.out_qs[i])
2556                         goto out_freeoutq;
2557                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2558                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2559                 card->qdio.out_qs[i]->queue_no = i;
2560                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2561                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2562                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2563                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2564                                 goto out_freeoutqbufs;
2565                 }
2566         }
2567
2568         /* completion */
2569         if (qeth_alloc_cq(card))
2570                 goto out_freeoutq;
2571
2572         return 0;
2573
2574 out_freeoutqbufs:
2575         while (j > 0) {
2576                 --j;
2577                 kmem_cache_free(qeth_qdio_outbuf_cache,
2578                                 card->qdio.out_qs[i]->bufs[j]);
2579                 card->qdio.out_qs[i]->bufs[j] = NULL;
2580         }
2581 out_freeoutq:
2582         while (i > 0) {
2583                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2584                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2585         }
2586         kfree(card->qdio.out_qs);
2587         card->qdio.out_qs = NULL;
2588 out_freepool:
2589         qeth_free_buffer_pool(card);
2590 out_freeinq:
2591         qeth_free_qdio_queue(card->qdio.in_q);
2592         card->qdio.in_q = NULL;
2593 out_nomem:
2594         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2595         return -ENOMEM;
2596 }
2597
2598 static void qeth_free_qdio_buffers(struct qeth_card *card)
2599 {
2600         int i, j;
2601
2602         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2603                 QETH_QDIO_UNINITIALIZED)
2604                 return;
2605
2606         qeth_free_cq(card);
2607         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2608         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2609                 if (card->qdio.in_q->bufs[j].rx_skb)
2610                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2611         }
2612         qeth_free_qdio_queue(card->qdio.in_q);
2613         card->qdio.in_q = NULL;
2614         /* inbound buffer pool */
2615         qeth_free_buffer_pool(card);
2616         /* free outbound qdio_qs */
2617         if (card->qdio.out_qs) {
2618                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2619                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2620                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2621                 }
2622                 kfree(card->qdio.out_qs);
2623                 card->qdio.out_qs = NULL;
2624         }
2625 }
2626
2627 static void qeth_create_qib_param_field(struct qeth_card *card,
2628                 char *param_field)
2629 {
2630
2631         param_field[0] = _ascebc['P'];
2632         param_field[1] = _ascebc['C'];
2633         param_field[2] = _ascebc['I'];
2634         param_field[3] = _ascebc['T'];
2635         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2636         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2637         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2638 }
2639
2640 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2641                 char *param_field)
2642 {
2643         param_field[16] = _ascebc['B'];
2644         param_field[17] = _ascebc['L'];
2645         param_field[18] = _ascebc['K'];
2646         param_field[19] = _ascebc['T'];
2647         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2648         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2649         *((unsigned int *) (&param_field[28])) =
2650                 card->info.blkt.inter_packet_jumbo;
2651 }
2652
2653 static int qeth_qdio_activate(struct qeth_card *card)
2654 {
2655         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2656         return qdio_activate(CARD_DDEV(card));
2657 }
2658
2659 static int qeth_dm_act(struct qeth_card *card)
2660 {
2661         int rc;
2662         struct qeth_cmd_buffer *iob;
2663
2664         QETH_DBF_TEXT(SETUP, 2, "dmact");
2665
2666         iob = qeth_wait_for_buffer(&card->write);
2667         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2668
2669         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2670                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2671         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2672                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2673         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2674         return rc;
2675 }
2676
2677 static int qeth_mpc_initialize(struct qeth_card *card)
2678 {
2679         int rc;
2680
2681         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2682
2683         rc = qeth_issue_next_read(card);
2684         if (rc) {
2685                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2686                 return rc;
2687         }
2688         rc = qeth_cm_enable(card);
2689         if (rc) {
2690                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2691                 goto out_qdio;
2692         }
2693         rc = qeth_cm_setup(card);
2694         if (rc) {
2695                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2696                 goto out_qdio;
2697         }
2698         rc = qeth_ulp_enable(card);
2699         if (rc) {
2700                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2701                 goto out_qdio;
2702         }
2703         rc = qeth_ulp_setup(card);
2704         if (rc) {
2705                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2706                 goto out_qdio;
2707         }
2708         rc = qeth_alloc_qdio_buffers(card);
2709         if (rc) {
2710                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2711                 goto out_qdio;
2712         }
2713         rc = qeth_qdio_establish(card);
2714         if (rc) {
2715                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2716                 qeth_free_qdio_buffers(card);
2717                 goto out_qdio;
2718         }
2719         rc = qeth_qdio_activate(card);
2720         if (rc) {
2721                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2722                 goto out_qdio;
2723         }
2724         rc = qeth_dm_act(card);
2725         if (rc) {
2726                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2727                 goto out_qdio;
2728         }
2729
2730         return 0;
2731 out_qdio:
2732         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2733         qdio_free(CARD_DDEV(card));
2734         return rc;
2735 }
2736
2737 void qeth_print_status_message(struct qeth_card *card)
2738 {
2739         switch (card->info.type) {
2740         case QETH_CARD_TYPE_OSD:
2741         case QETH_CARD_TYPE_OSM:
2742         case QETH_CARD_TYPE_OSX:
2743                 /* VM will use a non-zero first character
2744                  * to indicate a HiperSockets like reporting
2745                  * of the level OSA sets the first character to zero
2746                  * */
2747                 if (!card->info.mcl_level[0]) {
2748                         sprintf(card->info.mcl_level, "%02x%02x",
2749                                 card->info.mcl_level[2],
2750                                 card->info.mcl_level[3]);
2751                         break;
2752                 }
2753                 /* fallthrough */
2754         case QETH_CARD_TYPE_IQD:
2755                 if ((card->info.guestlan) ||
2756                     (card->info.mcl_level[0] & 0x80)) {
2757                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2758                                 card->info.mcl_level[0]];
2759                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2760                                 card->info.mcl_level[1]];
2761                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2762                                 card->info.mcl_level[2]];
2763                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2764                                 card->info.mcl_level[3]];
2765                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2766                 }
2767                 break;
2768         default:
2769                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2770         }
2771         dev_info(&card->gdev->dev,
2772                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2773                  qeth_get_cardname(card),
2774                  (card->info.mcl_level[0]) ? " (level: " : "",
2775                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2776                  (card->info.mcl_level[0]) ? ")" : "",
2777                  qeth_get_cardname_short(card));
2778 }
2779 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2780
2781 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2782 {
2783         struct qeth_buffer_pool_entry *entry;
2784
2785         QETH_CARD_TEXT(card, 5, "inwrklst");
2786
2787         list_for_each_entry(entry,
2788                             &card->qdio.init_pool.entry_list, init_list) {
2789                 qeth_put_buffer_pool_entry(card, entry);
2790         }
2791 }
2792
2793 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2794                                         struct qeth_card *card)
2795 {
2796         struct list_head *plh;
2797         struct qeth_buffer_pool_entry *entry;
2798         int i, free;
2799         struct page *page;
2800
2801         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2802                 return NULL;
2803
2804         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2805                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2806                 free = 1;
2807                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2808                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2809                                 free = 0;
2810                                 break;
2811                         }
2812                 }
2813                 if (free) {
2814                         list_del_init(&entry->list);
2815                         return entry;
2816                 }
2817         }
2818
2819         /* no free buffer in pool so take first one and swap pages */
2820         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2821                         struct qeth_buffer_pool_entry, list);
2822         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2823                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2824                         page = alloc_page(GFP_ATOMIC);
2825                         if (!page) {
2826                                 return NULL;
2827                         } else {
2828                                 free_page((unsigned long)entry->elements[i]);
2829                                 entry->elements[i] = page_address(page);
2830                                 if (card->options.performance_stats)
2831                                         card->perf_stats.sg_alloc_page_rx++;
2832                         }
2833                 }
2834         }
2835         list_del_init(&entry->list);
2836         return entry;
2837 }
2838
2839 static int qeth_init_input_buffer(struct qeth_card *card,
2840                 struct qeth_qdio_buffer *buf)
2841 {
2842         struct qeth_buffer_pool_entry *pool_entry;
2843         int i;
2844
2845         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2846                 buf->rx_skb = netdev_alloc_skb(card->dev,
2847                                                QETH_RX_PULL_LEN + ETH_HLEN);
2848                 if (!buf->rx_skb)
2849                         return 1;
2850         }
2851
2852         pool_entry = qeth_find_free_buffer_pool_entry(card);
2853         if (!pool_entry)
2854                 return 1;
2855
2856         /*
2857          * since the buffer is accessed only from the input_tasklet
2858          * there shouldn't be a need to synchronize; also, since we use
2859          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2860          * buffers
2861          */
2862
2863         buf->pool_entry = pool_entry;
2864         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2865                 buf->buffer->element[i].length = PAGE_SIZE;
2866                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2867                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2868                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2869                 else
2870                         buf->buffer->element[i].eflags = 0;
2871                 buf->buffer->element[i].sflags = 0;
2872         }
2873         return 0;
2874 }
2875
2876 int qeth_init_qdio_queues(struct qeth_card *card)
2877 {
2878         int i, j;
2879         int rc;
2880
2881         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2882
2883         /* inbound queue */
2884         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2885         memset(&card->rx, 0, sizeof(struct qeth_rx));
2886         qeth_initialize_working_pool_list(card);
2887         /*give only as many buffers to hardware as we have buffer pool entries*/
2888         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2889                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2890         card->qdio.in_q->next_buf_to_init =
2891                 card->qdio.in_buf_pool.buf_count - 1;
2892         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2893                      card->qdio.in_buf_pool.buf_count - 1);
2894         if (rc) {
2895                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2896                 return rc;
2897         }
2898
2899         /* completion */
2900         rc = qeth_cq_init(card);
2901         if (rc) {
2902                 return rc;
2903         }
2904
2905         /* outbound queue */
2906         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2907                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2908                                    QDIO_MAX_BUFFERS_PER_Q);
2909                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2910                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2911                                         card->qdio.out_qs[i]->bufs[j],
2912                                         QETH_QDIO_BUF_EMPTY);
2913                 }
2914                 card->qdio.out_qs[i]->card = card;
2915                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2916                 card->qdio.out_qs[i]->do_pack = 0;
2917                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2918                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2919                 atomic_set(&card->qdio.out_qs[i]->state,
2920                            QETH_OUT_Q_UNLOCKED);
2921         }
2922         return 0;
2923 }
2924 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2925
2926 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2927 {
2928         switch (link_type) {
2929         case QETH_LINK_TYPE_HSTR:
2930                 return 2;
2931         default:
2932                 return 1;
2933         }
2934 }
2935
2936 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2937                 struct qeth_ipa_cmd *cmd, __u8 command,
2938                 enum qeth_prot_versions prot)
2939 {
2940         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2941         cmd->hdr.command = command;
2942         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2943         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2944         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2945         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2946         if (card->options.layer2)
2947                 cmd->hdr.prim_version_no = 2;
2948         else
2949                 cmd->hdr.prim_version_no = 1;
2950         cmd->hdr.param_count = 1;
2951         cmd->hdr.prot_version = prot;
2952         cmd->hdr.ipa_supported = 0;
2953         cmd->hdr.ipa_enabled = 0;
2954 }
2955
2956 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2957                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2958 {
2959         struct qeth_cmd_buffer *iob;
2960
2961         iob = qeth_get_buffer(&card->write);
2962         if (iob) {
2963                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2964         } else {
2965                 dev_warn(&card->gdev->dev,
2966                          "The qeth driver ran out of channel command buffers\n");
2967                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2968                                  dev_name(&card->gdev->dev));
2969         }
2970
2971         return iob;
2972 }
2973 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2974
2975 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2976                 char prot_type)
2977 {
2978         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2979         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2980         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2981                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2982 }
2983 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2984
2985 /**
2986  * qeth_send_ipa_cmd() - send an IPA command
2987  *
2988  * See qeth_send_control_data() for explanation of the arguments.
2989  */
2990
2991 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2992                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2993                         unsigned long),
2994                 void *reply_param)
2995 {
2996         int rc;
2997         char prot_type;
2998
2999         QETH_CARD_TEXT(card, 4, "sendipa");
3000
3001         if (card->options.layer2)
3002                 if (card->info.type == QETH_CARD_TYPE_OSN)
3003                         prot_type = QETH_PROT_OSN2;
3004                 else
3005                         prot_type = QETH_PROT_LAYER2;
3006         else
3007                 prot_type = QETH_PROT_TCPIP;
3008         qeth_prepare_ipa_cmd(card, iob, prot_type);
3009         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
3010                                                 iob, reply_cb, reply_param);
3011         if (rc == -ETIME) {
3012                 qeth_clear_ipacmd_list(card);
3013                 qeth_schedule_recovery(card);
3014         }
3015         return rc;
3016 }
3017 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3018
3019 static int qeth_send_startlan(struct qeth_card *card)
3020 {
3021         int rc;
3022         struct qeth_cmd_buffer *iob;
3023
3024         QETH_DBF_TEXT(SETUP, 2, "strtlan");
3025
3026         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
3027         if (!iob)
3028                 return -ENOMEM;
3029         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
3030         return rc;
3031 }
3032
3033 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3034 {
3035         if (!cmd->hdr.return_code)
3036                 cmd->hdr.return_code =
3037                         cmd->data.setadapterparms.hdr.return_code;
3038         return cmd->hdr.return_code;
3039 }
3040
3041 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3042                 struct qeth_reply *reply, unsigned long data)
3043 {
3044         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3045
3046         QETH_CARD_TEXT(card, 3, "quyadpcb");
3047         if (qeth_setadpparms_inspect_rc(cmd))
3048                 return 0;
3049
3050         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3051                 card->info.link_type =
3052                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3053                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3054         }
3055         card->options.adp.supported_funcs =
3056                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3057         return 0;
3058 }
3059
3060 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3061                 __u32 command, __u32 cmdlen)
3062 {
3063         struct qeth_cmd_buffer *iob;
3064         struct qeth_ipa_cmd *cmd;
3065
3066         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3067                                      QETH_PROT_IPV4);
3068         if (iob) {
3069                 cmd = __ipa_cmd(iob);
3070                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3071                 cmd->data.setadapterparms.hdr.command_code = command;
3072                 cmd->data.setadapterparms.hdr.used_total = 1;
3073                 cmd->data.setadapterparms.hdr.seq_no = 1;
3074         }
3075
3076         return iob;
3077 }
3078
3079 int qeth_query_setadapterparms(struct qeth_card *card)
3080 {
3081         int rc;
3082         struct qeth_cmd_buffer *iob;
3083
3084         QETH_CARD_TEXT(card, 3, "queryadp");
3085         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3086                                    sizeof(struct qeth_ipacmd_setadpparms));
3087         if (!iob)
3088                 return -ENOMEM;
3089         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3090         return rc;
3091 }
3092 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3093
3094 static int qeth_query_ipassists_cb(struct qeth_card *card,
3095                 struct qeth_reply *reply, unsigned long data)
3096 {
3097         struct qeth_ipa_cmd *cmd;
3098
3099         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3100
3101         cmd = (struct qeth_ipa_cmd *) data;
3102
3103         switch (cmd->hdr.return_code) {
3104         case IPA_RC_NOTSUPP:
3105         case IPA_RC_L2_UNSUPPORTED_CMD:
3106                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3107                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3108                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3109                 return -0;
3110         default:
3111                 if (cmd->hdr.return_code) {
3112                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3113                                                 "rc=%d\n",
3114                                                 dev_name(&card->gdev->dev),
3115                                                 cmd->hdr.return_code);
3116                         return 0;
3117                 }
3118         }
3119
3120         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3121                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3122                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3123         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3124                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3125                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3126         } else
3127                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3128                                         "\n", dev_name(&card->gdev->dev));
3129         return 0;
3130 }
3131
3132 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3133 {
3134         int rc;
3135         struct qeth_cmd_buffer *iob;
3136
3137         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3138         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3139         if (!iob)
3140                 return -ENOMEM;
3141         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3142         return rc;
3143 }
3144 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3145
3146 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3147                                 struct qeth_reply *reply, unsigned long data)
3148 {
3149         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3150         struct qeth_query_switch_attributes *attrs;
3151         struct qeth_switch_info *sw_info;
3152
3153         QETH_CARD_TEXT(card, 2, "qswiatcb");
3154         if (qeth_setadpparms_inspect_rc(cmd))
3155                 return 0;
3156
3157         sw_info = (struct qeth_switch_info *)reply->param;
3158         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3159         sw_info->capabilities = attrs->capabilities;
3160         sw_info->settings = attrs->settings;
3161         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3162                         sw_info->settings);
3163         return 0;
3164 }
3165
3166 int qeth_query_switch_attributes(struct qeth_card *card,
3167                                  struct qeth_switch_info *sw_info)
3168 {
3169         struct qeth_cmd_buffer *iob;
3170
3171         QETH_CARD_TEXT(card, 2, "qswiattr");
3172         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3173                 return -EOPNOTSUPP;
3174         if (!netif_carrier_ok(card->dev))
3175                 return -ENOMEDIUM;
3176         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3177                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3178         if (!iob)
3179                 return -ENOMEM;
3180         return qeth_send_ipa_cmd(card, iob,
3181                                 qeth_query_switch_attributes_cb, sw_info);
3182 }
3183 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3184
3185 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3186                 struct qeth_reply *reply, unsigned long data)
3187 {
3188         struct qeth_ipa_cmd *cmd;
3189         __u16 rc;
3190
3191         cmd = (struct qeth_ipa_cmd *)data;
3192         rc = cmd->hdr.return_code;
3193         if (rc)
3194                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3195         else
3196                 card->info.diagass_support = cmd->data.diagass.ext;
3197         return 0;
3198 }
3199
3200 static int qeth_query_setdiagass(struct qeth_card *card)
3201 {
3202         struct qeth_cmd_buffer *iob;
3203         struct qeth_ipa_cmd    *cmd;
3204
3205         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3206         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3207         if (!iob)
3208                 return -ENOMEM;
3209         cmd = __ipa_cmd(iob);
3210         cmd->data.diagass.subcmd_len = 16;
3211         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3212         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3213 }
3214
3215 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3216 {
3217         unsigned long info = get_zeroed_page(GFP_KERNEL);
3218         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3219         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3220         struct ccw_dev_id ccwid;
3221         int level;
3222
3223         tid->chpid = card->info.chpid;
3224         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3225         tid->ssid = ccwid.ssid;
3226         tid->devno = ccwid.devno;
3227         if (!info)
3228                 return;
3229         level = stsi(NULL, 0, 0, 0);
3230         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3231                 tid->lparnr = info222->lpar_number;
3232         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3233                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3234                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3235         }
3236         free_page(info);
3237         return;
3238 }
3239
3240 static int qeth_hw_trap_cb(struct qeth_card *card,
3241                 struct qeth_reply *reply, unsigned long data)
3242 {
3243         struct qeth_ipa_cmd *cmd;
3244         __u16 rc;
3245
3246         cmd = (struct qeth_ipa_cmd *)data;
3247         rc = cmd->hdr.return_code;
3248         if (rc)
3249                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3250         return 0;
3251 }
3252
3253 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3254 {
3255         struct qeth_cmd_buffer *iob;
3256         struct qeth_ipa_cmd *cmd;
3257
3258         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3259         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3260         if (!iob)
3261                 return -ENOMEM;
3262         cmd = __ipa_cmd(iob);
3263         cmd->data.diagass.subcmd_len = 80;
3264         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3265         cmd->data.diagass.type = 1;
3266         cmd->data.diagass.action = action;
3267         switch (action) {
3268         case QETH_DIAGS_TRAP_ARM:
3269                 cmd->data.diagass.options = 0x0003;
3270                 cmd->data.diagass.ext = 0x00010000 +
3271                         sizeof(struct qeth_trap_id);
3272                 qeth_get_trap_id(card,
3273                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3274                 break;
3275         case QETH_DIAGS_TRAP_DISARM:
3276                 cmd->data.diagass.options = 0x0001;
3277                 break;
3278         case QETH_DIAGS_TRAP_CAPTURE:
3279                 break;
3280         }
3281         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3282 }
3283 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3284
3285 static int qeth_check_qdio_errors(struct qeth_card *card,
3286                                   struct qdio_buffer *buf,
3287                                   unsigned int qdio_error,
3288                                   const char *dbftext)
3289 {
3290         if (qdio_error) {
3291                 QETH_CARD_TEXT(card, 2, dbftext);
3292                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3293                                buf->element[15].sflags);
3294                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3295                                buf->element[14].sflags);
3296                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3297                 if ((buf->element[15].sflags) == 0x12) {
3298                         card->stats.rx_dropped++;
3299                         return 0;
3300                 } else
3301                         return 1;
3302         }
3303         return 0;
3304 }
3305
3306 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3307 {
3308         struct qeth_qdio_q *queue = card->qdio.in_q;
3309         struct list_head *lh;
3310         int count;
3311         int i;
3312         int rc;
3313         int newcount = 0;
3314
3315         count = (index < queue->next_buf_to_init)?
3316                 card->qdio.in_buf_pool.buf_count -
3317                 (queue->next_buf_to_init - index) :
3318                 card->qdio.in_buf_pool.buf_count -
3319                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3320         /* only requeue at a certain threshold to avoid SIGAs */
3321         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3322                 for (i = queue->next_buf_to_init;
3323                      i < queue->next_buf_to_init + count; ++i) {
3324                         if (qeth_init_input_buffer(card,
3325                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3326                                 break;
3327                         } else {
3328                                 newcount++;
3329                         }
3330                 }
3331
3332                 if (newcount < count) {
3333                         /* we are in memory shortage so we switch back to
3334                            traditional skb allocation and drop packages */
3335                         atomic_set(&card->force_alloc_skb, 3);
3336                         count = newcount;
3337                 } else {
3338                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3339                 }
3340
3341                 if (!count) {
3342                         i = 0;
3343                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3344                                 i++;
3345                         if (i == card->qdio.in_buf_pool.buf_count) {
3346                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3347                                 card->reclaim_index = index;
3348                                 schedule_delayed_work(
3349                                         &card->buffer_reclaim_work,
3350                                         QETH_RECLAIM_WORK_TIME);
3351                         }
3352                         return;
3353                 }
3354
3355                 /*
3356                  * according to old code it should be avoided to requeue all
3357                  * 128 buffers in order to benefit from PCI avoidance.
3358                  * this function keeps at least one buffer (the buffer at
3359                  * 'index') un-requeued -> this buffer is the first buffer that
3360                  * will be requeued the next time
3361                  */
3362                 if (card->options.performance_stats) {
3363                         card->perf_stats.inbound_do_qdio_cnt++;
3364                         card->perf_stats.inbound_do_qdio_start_time =
3365                                 qeth_get_micros();
3366                 }
3367                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3368                              queue->next_buf_to_init, count);
3369                 if (card->options.performance_stats)
3370                         card->perf_stats.inbound_do_qdio_time +=
3371                                 qeth_get_micros() -
3372                                 card->perf_stats.inbound_do_qdio_start_time;
3373                 if (rc) {
3374                         QETH_CARD_TEXT(card, 2, "qinberr");
3375                 }
3376                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3377                                           QDIO_MAX_BUFFERS_PER_Q;
3378         }
3379 }
3380
3381 static void qeth_buffer_reclaim_work(struct work_struct *work)
3382 {
3383         struct qeth_card *card = container_of(work, struct qeth_card,
3384                 buffer_reclaim_work.work);
3385
3386         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3387         qeth_queue_input_buffer(card, card->reclaim_index);
3388 }
3389
3390 static void qeth_handle_send_error(struct qeth_card *card,
3391                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3392 {
3393         int sbalf15 = buffer->buffer->element[15].sflags;
3394
3395         QETH_CARD_TEXT(card, 6, "hdsnderr");
3396         if (card->info.type == QETH_CARD_TYPE_IQD) {
3397                 if (sbalf15 == 0) {
3398                         qdio_err = 0;
3399                 } else {
3400                         qdio_err = 1;
3401                 }
3402         }
3403         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3404
3405         if (!qdio_err)
3406                 return;
3407
3408         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3409                 return;
3410
3411         QETH_CARD_TEXT(card, 1, "lnkfail");
3412         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3413                        (u16)qdio_err, (u8)sbalf15);
3414 }
3415
3416 /**
3417  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3418  * @queue: queue to check for packing buffer
3419  *
3420  * Returns number of buffers that were prepared for flush.
3421  */
3422 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3423 {
3424         struct qeth_qdio_out_buffer *buffer;
3425
3426         buffer = queue->bufs[queue->next_buf_to_fill];
3427         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3428             (buffer->next_element_to_fill > 0)) {
3429                 /* it's a packing buffer */
3430                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3431                 queue->next_buf_to_fill =
3432                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3433                 return 1;
3434         }
3435         return 0;
3436 }
3437
3438 /*
3439  * Switched to packing state if the number of used buffers on a queue
3440  * reaches a certain limit.
3441  */
3442 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3443 {
3444         if (!queue->do_pack) {
3445                 if (atomic_read(&queue->used_buffers)
3446                     >= QETH_HIGH_WATERMARK_PACK){
3447                         /* switch non-PACKING -> PACKING */
3448                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3449                         if (queue->card->options.performance_stats)
3450                                 queue->card->perf_stats.sc_dp_p++;
3451                         queue->do_pack = 1;
3452                 }
3453         }
3454 }
3455
3456 /*
3457  * Switches from packing to non-packing mode. If there is a packing
3458  * buffer on the queue this buffer will be prepared to be flushed.
3459  * In that case 1 is returned to inform the caller. If no buffer
3460  * has to be flushed, zero is returned.
3461  */
3462 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3463 {
3464         if (queue->do_pack) {
3465                 if (atomic_read(&queue->used_buffers)
3466                     <= QETH_LOW_WATERMARK_PACK) {
3467                         /* switch PACKING -> non-PACKING */
3468                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3469                         if (queue->card->options.performance_stats)
3470                                 queue->card->perf_stats.sc_p_dp++;
3471                         queue->do_pack = 0;
3472                         return qeth_prep_flush_pack_buffer(queue);
3473                 }
3474         }
3475         return 0;
3476 }
3477
3478 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3479                                int count)
3480 {
3481         struct qeth_qdio_out_buffer *buf;
3482         int rc;
3483         int i;
3484         unsigned int qdio_flags;
3485
3486         for (i = index; i < index + count; ++i) {
3487                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3488                 buf = queue->bufs[bidx];
3489                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3490                                 SBAL_EFLAGS_LAST_ENTRY;
3491
3492                 if (queue->bufstates)
3493                         queue->bufstates[bidx].user = buf;
3494
3495                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3496                         continue;
3497
3498                 if (!queue->do_pack) {
3499                         if ((atomic_read(&queue->used_buffers) >=
3500                                 (QETH_HIGH_WATERMARK_PACK -
3501                                  QETH_WATERMARK_PACK_FUZZ)) &&
3502                             !atomic_read(&queue->set_pci_flags_count)) {
3503                                 /* it's likely that we'll go to packing
3504                                  * mode soon */
3505                                 atomic_inc(&queue->set_pci_flags_count);
3506                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3507                         }
3508                 } else {
3509                         if (!atomic_read(&queue->set_pci_flags_count)) {
3510                                 /*
3511                                  * there's no outstanding PCI any more, so we
3512                                  * have to request a PCI to be sure the the PCI
3513                                  * will wake at some time in the future then we
3514                                  * can flush packed buffers that might still be
3515                                  * hanging around, which can happen if no
3516                                  * further send was requested by the stack
3517                                  */
3518                                 atomic_inc(&queue->set_pci_flags_count);
3519                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3520                         }
3521                 }
3522         }
3523
3524         netif_trans_update(queue->card->dev);
3525         if (queue->card->options.performance_stats) {
3526                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3527                 queue->card->perf_stats.outbound_do_qdio_start_time =
3528                         qeth_get_micros();
3529         }
3530         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3531         if (atomic_read(&queue->set_pci_flags_count))
3532                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3533         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3534                      queue->queue_no, index, count);
3535         if (queue->card->options.performance_stats)
3536                 queue->card->perf_stats.outbound_do_qdio_time +=
3537                         qeth_get_micros() -
3538                         queue->card->perf_stats.outbound_do_qdio_start_time;
3539         atomic_add(count, &queue->used_buffers);
3540         if (rc) {
3541                 queue->card->stats.tx_errors += count;
3542                 /* ignore temporary SIGA errors without busy condition */
3543                 if (rc == -ENOBUFS)
3544                         return;
3545                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3546                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3547                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3548                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3549                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3550
3551                 /* this must not happen under normal circumstances. if it
3552                  * happens something is really wrong -> recover */
3553                 qeth_schedule_recovery(queue->card);
3554                 return;
3555         }
3556         if (queue->card->options.performance_stats)
3557                 queue->card->perf_stats.bufs_sent += count;
3558 }
3559
3560 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3561 {
3562         int index;
3563         int flush_cnt = 0;
3564         int q_was_packing = 0;
3565
3566         /*
3567          * check if weed have to switch to non-packing mode or if
3568          * we have to get a pci flag out on the queue
3569          */
3570         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3571             !atomic_read(&queue->set_pci_flags_count)) {
3572                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3573                                 QETH_OUT_Q_UNLOCKED) {
3574                         /*
3575                          * If we get in here, there was no action in
3576                          * do_send_packet. So, we check if there is a
3577                          * packing buffer to be flushed here.
3578                          */
3579                         netif_stop_queue(queue->card->dev);
3580                         index = queue->next_buf_to_fill;
3581                         q_was_packing = queue->do_pack;
3582                         /* queue->do_pack may change */
3583                         barrier();
3584                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3585                         if (!flush_cnt &&
3586                             !atomic_read(&queue->set_pci_flags_count))
3587                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3588                         if (queue->card->options.performance_stats &&
3589                             q_was_packing)
3590                                 queue->card->perf_stats.bufs_sent_pack +=
3591                                         flush_cnt;
3592                         if (flush_cnt)
3593                                 qeth_flush_buffers(queue, index, flush_cnt);
3594                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3595                 }
3596         }
3597 }
3598
3599 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3600                                  unsigned long card_ptr)
3601 {
3602         struct qeth_card *card = (struct qeth_card *)card_ptr;
3603
3604         if (card->dev && (card->dev->flags & IFF_UP))
3605                 napi_schedule(&card->napi);
3606 }
3607
3608 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3609 {
3610         int rc;
3611
3612         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3613                 rc = -1;
3614                 goto out;
3615         } else {
3616                 if (card->options.cq == cq) {
3617                         rc = 0;
3618                         goto out;
3619                 }
3620
3621                 if (card->state != CARD_STATE_DOWN &&
3622                     card->state != CARD_STATE_RECOVER) {
3623                         rc = -1;
3624                         goto out;
3625                 }
3626
3627                 qeth_free_qdio_buffers(card);
3628                 card->options.cq = cq;
3629                 rc = 0;
3630         }
3631 out:
3632         return rc;
3633
3634 }
3635 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3636
3637
3638 static void qeth_qdio_cq_handler(struct qeth_card *card,
3639                 unsigned int qdio_err,
3640                 unsigned int queue, int first_element, int count) {
3641         struct qeth_qdio_q *cq = card->qdio.c_q;
3642         int i;
3643         int rc;
3644
3645         if (!qeth_is_cq(card, queue))
3646                 goto out;
3647
3648         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3649         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3650         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3651
3652         if (qdio_err) {
3653                 netif_stop_queue(card->dev);
3654                 qeth_schedule_recovery(card);
3655                 goto out;
3656         }
3657
3658         if (card->options.performance_stats) {
3659                 card->perf_stats.cq_cnt++;
3660                 card->perf_stats.cq_start_time = qeth_get_micros();
3661         }
3662
3663         for (i = first_element; i < first_element + count; ++i) {
3664                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3665                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3666                 int e;
3667
3668                 e = 0;
3669                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3670                        buffer->element[e].addr) {
3671                         unsigned long phys_aob_addr;
3672
3673                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3674                         qeth_qdio_handle_aob(card, phys_aob_addr);
3675                         buffer->element[e].addr = NULL;
3676                         buffer->element[e].eflags = 0;
3677                         buffer->element[e].sflags = 0;
3678                         buffer->element[e].length = 0;
3679
3680                         ++e;
3681                 }
3682
3683                 buffer->element[15].eflags = 0;
3684                 buffer->element[15].sflags = 0;
3685         }
3686         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3687                     card->qdio.c_q->next_buf_to_init,
3688                     count);
3689         if (rc) {
3690                 dev_warn(&card->gdev->dev,
3691                         "QDIO reported an error, rc=%i\n", rc);
3692                 QETH_CARD_TEXT(card, 2, "qcqherr");
3693         }
3694         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3695                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3696
3697         netif_wake_queue(card->dev);
3698
3699         if (card->options.performance_stats) {
3700                 int delta_t = qeth_get_micros();
3701                 delta_t -= card->perf_stats.cq_start_time;
3702                 card->perf_stats.cq_time += delta_t;
3703         }
3704 out:
3705         return;
3706 }
3707
3708 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3709                                     unsigned int qdio_err, int queue,
3710                                     int first_elem, int count,
3711                                     unsigned long card_ptr)
3712 {
3713         struct qeth_card *card = (struct qeth_card *)card_ptr;
3714
3715         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3716         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3717
3718         if (qeth_is_cq(card, queue))
3719                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3720         else if (qdio_err)
3721                 qeth_schedule_recovery(card);
3722 }
3723
3724 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3725                                      unsigned int qdio_error, int __queue,
3726                                      int first_element, int count,
3727                                      unsigned long card_ptr)
3728 {
3729         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3730         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3731         struct qeth_qdio_out_buffer *buffer;
3732         int i;
3733
3734         QETH_CARD_TEXT(card, 6, "qdouhdl");
3735         if (qdio_error & QDIO_ERROR_FATAL) {
3736                 QETH_CARD_TEXT(card, 2, "achkcond");
3737                 netif_stop_queue(card->dev);
3738                 qeth_schedule_recovery(card);
3739                 return;
3740         }
3741         if (card->options.performance_stats) {
3742                 card->perf_stats.outbound_handler_cnt++;
3743                 card->perf_stats.outbound_handler_start_time =
3744                         qeth_get_micros();
3745         }
3746         for (i = first_element; i < (first_element + count); ++i) {
3747                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3748                 buffer = queue->bufs[bidx];
3749                 qeth_handle_send_error(card, buffer, qdio_error);
3750
3751                 if (queue->bufstates &&
3752                     (queue->bufstates[bidx].flags &
3753                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3754                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3755
3756                         if (atomic_cmpxchg(&buffer->state,
3757                                            QETH_QDIO_BUF_PRIMED,
3758                                            QETH_QDIO_BUF_PENDING) ==
3759                                 QETH_QDIO_BUF_PRIMED) {
3760                                 qeth_notify_skbs(queue, buffer,
3761                                                  TX_NOTIFY_PENDING);
3762                         }
3763                         buffer->aob = queue->bufstates[bidx].aob;
3764                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3765                         QETH_CARD_TEXT(queue->card, 5, "aob");
3766                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3767                                         virt_to_phys(buffer->aob));
3768
3769                         /* prepare the queue slot for re-use: */
3770                         qeth_scrub_qdio_buffer(buffer->buffer,
3771                                                QETH_MAX_BUFFER_ELEMENTS(card));
3772                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3773                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3774                                 qeth_schedule_recovery(card);
3775                         }
3776                 } else {
3777                         if (card->options.cq == QETH_CQ_ENABLED) {
3778                                 enum iucv_tx_notify n;
3779
3780                                 n = qeth_compute_cq_notification(
3781                                         buffer->buffer->element[15].sflags, 0);
3782                                 qeth_notify_skbs(queue, buffer, n);
3783                         }
3784
3785                         qeth_clear_output_buffer(queue, buffer,
3786                                                 QETH_QDIO_BUF_EMPTY);
3787                 }
3788                 qeth_cleanup_handled_pending(queue, bidx, 0);
3789         }
3790         atomic_sub(count, &queue->used_buffers);
3791         /* check if we need to do something on this outbound queue */
3792         if (card->info.type != QETH_CARD_TYPE_IQD)
3793                 qeth_check_outbound_queue(queue);
3794
3795         netif_wake_queue(queue->card->dev);
3796         if (card->options.performance_stats)
3797                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3798                         card->perf_stats.outbound_handler_start_time;
3799 }
3800
3801 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3802 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3803 {
3804         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3805                 return 2;
3806         return queue_num;
3807 }
3808
3809 /**
3810  * Note: Function assumes that we have 4 outbound queues.
3811  */
3812 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3813                         int ipv, int cast_type)
3814 {
3815         __be16 *tci;
3816         u8 tos;
3817
3818         if (cast_type && card->info.is_multicast_different)
3819                 return card->info.is_multicast_different &
3820                         (card->qdio.no_out_queues - 1);
3821
3822         switch (card->qdio.do_prio_queueing) {
3823         case QETH_PRIO_Q_ING_TOS:
3824         case QETH_PRIO_Q_ING_PREC:
3825                 switch (ipv) {
3826                 case 4:
3827                         tos = ipv4_get_dsfield(ip_hdr(skb));
3828                         break;
3829                 case 6:
3830                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3831                         break;
3832                 default:
3833                         return card->qdio.default_out_queue;
3834                 }
3835                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3836                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3837                 if (tos & IPTOS_MINCOST)
3838                         return qeth_cut_iqd_prio(card, 3);
3839                 if (tos & IPTOS_RELIABILITY)
3840                         return 2;
3841                 if (tos & IPTOS_THROUGHPUT)
3842                         return 1;
3843                 if (tos & IPTOS_LOWDELAY)
3844                         return 0;
3845                 break;
3846         case QETH_PRIO_Q_ING_SKB:
3847                 if (skb->priority > 5)
3848                         return 0;
3849                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3850         case QETH_PRIO_Q_ING_VLAN:
3851                 tci = &((struct ethhdr *)skb->data)->h_proto;
3852                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3853                         return qeth_cut_iqd_prio(card,
3854                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3855                 break;
3856         default:
3857                 break;
3858         }
3859         return card->qdio.default_out_queue;
3860 }
3861 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3862
3863 /**
3864  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3865  * @skb:                                SKB address
3866  *
3867  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3868  * fragmented part of the SKB. Returns zero for linear SKB.
3869  */
3870 int qeth_get_elements_for_frags(struct sk_buff *skb)
3871 {
3872         int cnt, elements = 0;
3873
3874         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3875                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3876
3877                 elements += qeth_get_elements_for_range(
3878                         (addr_t)skb_frag_address(frag),
3879                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3880         }
3881         return elements;
3882 }
3883 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3884
3885 /**
3886  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3887  * @card:                       qeth card structure, to check max. elems.
3888  * @skb:                        SKB address
3889  * @extra_elems:                extra elems needed, to check against max.
3890  * @data_offset:                range starts at skb->data + data_offset
3891  *
3892  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3893  * skb data, including linear part and fragments. Checks if the result plus
3894  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3895  * Note: extra_elems is not included in the returned result.
3896  */
3897 int qeth_get_elements_no(struct qeth_card *card,
3898                      struct sk_buff *skb, int extra_elems, int data_offset)
3899 {
3900         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3901         int elements = qeth_get_elements_for_frags(skb);
3902         addr_t start = (addr_t)skb->data + data_offset;
3903
3904         if (start != end)
3905                 elements += qeth_get_elements_for_range(start, end);
3906
3907         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3908                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3909                         "(Number=%d / Length=%d). Discarded.\n",
3910                         elements + extra_elems, skb->len);
3911                 return 0;
3912         }
3913         return elements;
3914 }
3915 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3916
3917 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3918 {
3919         int hroom, inpage, rest;
3920
3921         if (((unsigned long)skb->data & PAGE_MASK) !=
3922             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3923                 hroom = skb_headroom(skb);
3924                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3925                 rest = len - inpage;
3926                 if (rest > hroom)
3927                         return 1;
3928                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3929                 skb->data -= rest;
3930                 skb->tail -= rest;
3931                 *hdr = (struct qeth_hdr *)skb->data;
3932                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3933         }
3934         return 0;
3935 }
3936 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3937
3938 /**
3939  * qeth_push_hdr() - push a qeth_hdr onto an skb.
3940  * @skb: skb that the qeth_hdr should be pushed onto.
3941  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3942  *       it contains a valid pointer to a qeth_hdr.
3943  * @len: length of the hdr that needs to be pushed on.
3944  *
3945  * Returns the pushed length. If the header can't be pushed on
3946  * (eg. because it would cross a page boundary), it is allocated from
3947  * the cache instead and 0 is returned.
3948  * Error to create the hdr is indicated by returning with < 0.
3949  */
3950 int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
3951 {
3952         if (skb_headroom(skb) >= len &&
3953             qeth_get_elements_for_range((addr_t)skb->data - len,
3954                                         (addr_t)skb->data) == 1) {
3955                 *hdr = skb_push(skb, len);
3956                 return len;
3957         }
3958         /* fall back */
3959         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3960         if (!*hdr)
3961                 return -ENOMEM;
3962         return 0;
3963 }
3964 EXPORT_SYMBOL_GPL(qeth_push_hdr);
3965
3966 static void __qeth_fill_buffer(struct sk_buff *skb,
3967                                struct qeth_qdio_out_buffer *buf,
3968                                bool is_first_elem, unsigned int offset)
3969 {
3970         struct qdio_buffer *buffer = buf->buffer;
3971         int element = buf->next_element_to_fill;
3972         int length = skb_headlen(skb) - offset;
3973         char *data = skb->data + offset;
3974         int length_here, cnt;
3975
3976         /* map linear part into buffer element(s) */
3977         while (length > 0) {
3978                 /* length_here is the remaining amount of data in this page */
3979                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3980                 if (length < length_here)
3981                         length_here = length;
3982
3983                 buffer->element[element].addr = data;
3984                 buffer->element[element].length = length_here;
3985                 length -= length_here;
3986                 if (is_first_elem) {
3987                         is_first_elem = false;
3988                         if (length || skb_is_nonlinear(skb))
3989                                 /* skb needs additional elements */
3990                                 buffer->element[element].eflags =
3991                                         SBAL_EFLAGS_FIRST_FRAG;
3992                         else
3993                                 buffer->element[element].eflags = 0;
3994                 } else {
3995                         buffer->element[element].eflags =
3996                                 SBAL_EFLAGS_MIDDLE_FRAG;
3997                 }
3998                 data += length_here;
3999                 element++;
4000         }
4001
4002         /* map page frags into buffer element(s) */
4003         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4004                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4005
4006                 data = skb_frag_address(frag);
4007                 length = skb_frag_size(frag);
4008                 while (length > 0) {
4009                         length_here = PAGE_SIZE -
4010                                 ((unsigned long) data % PAGE_SIZE);
4011                         if (length < length_here)
4012                                 length_here = length;
4013
4014                         buffer->element[element].addr = data;
4015                         buffer->element[element].length = length_here;
4016                         buffer->element[element].eflags =
4017                                 SBAL_EFLAGS_MIDDLE_FRAG;
4018                         length -= length_here;
4019                         data += length_here;
4020                         element++;
4021                 }
4022         }
4023
4024         if (buffer->element[element - 1].eflags)
4025                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4026         buf->next_element_to_fill = element;
4027 }
4028
4029 /**
4030  * qeth_fill_buffer() - map skb into an output buffer
4031  * @queue:      QDIO queue to submit the buffer on
4032  * @buf:        buffer to transport the skb
4033  * @skb:        skb to map into the buffer
4034  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4035  *              from qeth_core_header_cache.
4036  * @offset:     when mapping the skb, start at skb->data + offset
4037  * @hd_len:     if > 0, build a dedicated header element of this size
4038  */
4039 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4040                             struct qeth_qdio_out_buffer *buf,
4041                             struct sk_buff *skb, struct qeth_hdr *hdr,
4042                             unsigned int offset, unsigned int hd_len)
4043 {
4044         struct qdio_buffer *buffer = buf->buffer;
4045         bool is_first_elem = true;
4046         int flush_cnt = 0;
4047
4048         refcount_inc(&skb->users);
4049         skb_queue_tail(&buf->skb_list, skb);
4050
4051         /* build dedicated header element */
4052         if (hd_len) {
4053                 int element = buf->next_element_to_fill;
4054                 is_first_elem = false;
4055
4056                 buffer->element[element].addr = hdr;
4057                 buffer->element[element].length = hd_len;
4058                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4059                 /* remember to free cache-allocated qeth_hdr: */
4060                 buf->is_header[element] = ((void *)hdr != skb->data);
4061                 buf->next_element_to_fill++;
4062         }
4063
4064         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4065
4066         if (!queue->do_pack) {
4067                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4068                 /* set state to PRIMED -> will be flushed */
4069                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4070                 flush_cnt = 1;
4071         } else {
4072                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4073                 if (queue->card->options.performance_stats)
4074                         queue->card->perf_stats.skbs_sent_pack++;
4075                 if (buf->next_element_to_fill >=
4076                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4077                         /*
4078                          * packed buffer if full -> set state PRIMED
4079                          * -> will be flushed
4080                          */
4081                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4082                         flush_cnt = 1;
4083                 }
4084         }
4085         return flush_cnt;
4086 }
4087
4088 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4089                              struct qeth_hdr *hdr, unsigned int offset,
4090                              unsigned int hd_len)
4091 {
4092         int index = queue->next_buf_to_fill;
4093         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
4094
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                 return -EBUSY;
4101         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
4102         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4103         qeth_flush_buffers(queue, index, 1);
4104         return 0;
4105 }
4106 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4107
4108 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4109                         struct sk_buff *skb, struct qeth_hdr *hdr,
4110                         unsigned int offset, unsigned int hd_len,
4111                         int elements_needed)
4112 {
4113         struct qeth_qdio_out_buffer *buffer;
4114         int start_index;
4115         int flush_count = 0;
4116         int do_pack = 0;
4117         int tmp;
4118         int rc = 0;
4119
4120         /* spin until we get the queue ... */
4121         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4122                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4123         start_index = queue->next_buf_to_fill;
4124         buffer = queue->bufs[queue->next_buf_to_fill];
4125         /*
4126          * check if buffer is empty to make sure that we do not 'overtake'
4127          * ourselves and try to fill a buffer that is already primed
4128          */
4129         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4130                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4131                 return -EBUSY;
4132         }
4133         /* check if we need to switch packing state of this queue */
4134         qeth_switch_to_packing_if_needed(queue);
4135         if (queue->do_pack) {
4136                 do_pack = 1;
4137                 /* does packet fit in current buffer? */
4138                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4139                     buffer->next_element_to_fill) < elements_needed) {
4140                         /* ... no -> set state PRIMED */
4141                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4142                         flush_count++;
4143                         queue->next_buf_to_fill =
4144                                 (queue->next_buf_to_fill + 1) %
4145                                 QDIO_MAX_BUFFERS_PER_Q;
4146                         buffer = queue->bufs[queue->next_buf_to_fill];
4147                         /* we did a step forward, so check buffer state
4148                          * again */
4149                         if (atomic_read(&buffer->state) !=
4150                             QETH_QDIO_BUF_EMPTY) {
4151                                 qeth_flush_buffers(queue, start_index,
4152                                                            flush_count);
4153                                 atomic_set(&queue->state,
4154                                                 QETH_OUT_Q_UNLOCKED);
4155                                 rc = -EBUSY;
4156                                 goto out;
4157                         }
4158                 }
4159         }
4160         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4161         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4162                                   QDIO_MAX_BUFFERS_PER_Q;
4163         flush_count += tmp;
4164         if (flush_count)
4165                 qeth_flush_buffers(queue, start_index, flush_count);
4166         else if (!atomic_read(&queue->set_pci_flags_count))
4167                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4168         /*
4169          * queue->state will go from LOCKED -> UNLOCKED or from
4170          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4171          * (switch packing state or flush buffer to get another pci flag out).
4172          * In that case we will enter this loop
4173          */
4174         while (atomic_dec_return(&queue->state)) {
4175                 start_index = queue->next_buf_to_fill;
4176                 /* check if we can go back to non-packing state */
4177                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4178                 /*
4179                  * check if we need to flush a packing buffer to get a pci
4180                  * flag out on the queue
4181                  */
4182                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4183                         tmp = qeth_prep_flush_pack_buffer(queue);
4184                 if (tmp) {
4185                         qeth_flush_buffers(queue, start_index, tmp);
4186                         flush_count += tmp;
4187                 }
4188         }
4189 out:
4190         /* at this point the queue is UNLOCKED again */
4191         if (queue->card->options.performance_stats && do_pack)
4192                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4193
4194         return rc;
4195 }
4196 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4197
4198 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4199                 struct qeth_reply *reply, unsigned long data)
4200 {
4201         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4202         struct qeth_ipacmd_setadpparms *setparms;
4203
4204         QETH_CARD_TEXT(card, 4, "prmadpcb");
4205
4206         setparms = &(cmd->data.setadapterparms);
4207         if (qeth_setadpparms_inspect_rc(cmd)) {
4208                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4209                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4210         }
4211         card->info.promisc_mode = setparms->data.mode;
4212         return 0;
4213 }
4214
4215 void qeth_setadp_promisc_mode(struct qeth_card *card)
4216 {
4217         enum qeth_ipa_promisc_modes mode;
4218         struct net_device *dev = card->dev;
4219         struct qeth_cmd_buffer *iob;
4220         struct qeth_ipa_cmd *cmd;
4221
4222         QETH_CARD_TEXT(card, 4, "setprom");
4223
4224         if (((dev->flags & IFF_PROMISC) &&
4225              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4226             (!(dev->flags & IFF_PROMISC) &&
4227              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4228                 return;
4229         mode = SET_PROMISC_MODE_OFF;
4230         if (dev->flags & IFF_PROMISC)
4231                 mode = SET_PROMISC_MODE_ON;
4232         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4233
4234         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4235                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4236         if (!iob)
4237                 return;
4238         cmd = __ipa_cmd(iob);
4239         cmd->data.setadapterparms.data.mode = mode;
4240         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4241 }
4242 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4243
4244 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4245 {
4246         struct qeth_card *card;
4247         char dbf_text[15];
4248
4249         card = dev->ml_priv;
4250
4251         QETH_CARD_TEXT(card, 4, "chgmtu");
4252         sprintf(dbf_text, "%8x", new_mtu);
4253         QETH_CARD_TEXT(card, 4, dbf_text);
4254
4255         if (!qeth_mtu_is_valid(card, new_mtu))
4256                 return -EINVAL;
4257         dev->mtu = new_mtu;
4258         return 0;
4259 }
4260 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4261
4262 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4263 {
4264         struct qeth_card *card;
4265
4266         card = dev->ml_priv;
4267
4268         QETH_CARD_TEXT(card, 5, "getstat");
4269
4270         return &card->stats;
4271 }
4272 EXPORT_SYMBOL_GPL(qeth_get_stats);
4273
4274 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4275                 struct qeth_reply *reply, unsigned long data)
4276 {
4277         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4278
4279         QETH_CARD_TEXT(card, 4, "chgmaccb");
4280         if (qeth_setadpparms_inspect_rc(cmd))
4281                 return 0;
4282
4283         if (!card->options.layer2 ||
4284             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4285                 ether_addr_copy(card->dev->dev_addr,
4286                                 cmd->data.setadapterparms.data.change_addr.addr);
4287                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4288         }
4289         return 0;
4290 }
4291
4292 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4293 {
4294         int rc;
4295         struct qeth_cmd_buffer *iob;
4296         struct qeth_ipa_cmd *cmd;
4297
4298         QETH_CARD_TEXT(card, 4, "chgmac");
4299
4300         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4301                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4302                                    sizeof(struct qeth_change_addr));
4303         if (!iob)
4304                 return -ENOMEM;
4305         cmd = __ipa_cmd(iob);
4306         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4307         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4308         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4309                         card->dev->dev_addr);
4310         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4311                                NULL);
4312         return rc;
4313 }
4314 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4315
4316 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4317                 struct qeth_reply *reply, unsigned long data)
4318 {
4319         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4320         struct qeth_set_access_ctrl *access_ctrl_req;
4321         int fallback = *(int *)reply->param;
4322
4323         QETH_CARD_TEXT(card, 4, "setaccb");
4324         if (cmd->hdr.return_code)
4325                 return 0;
4326         qeth_setadpparms_inspect_rc(cmd);
4327
4328         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4329         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4330         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4331         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4332                 cmd->data.setadapterparms.hdr.return_code);
4333         if (cmd->data.setadapterparms.hdr.return_code !=
4334                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4335                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4336                                 card->gdev->dev.kobj.name,
4337                                 access_ctrl_req->subcmd_code,
4338                                 cmd->data.setadapterparms.hdr.return_code);
4339         switch (cmd->data.setadapterparms.hdr.return_code) {
4340         case SET_ACCESS_CTRL_RC_SUCCESS:
4341                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4342                         dev_info(&card->gdev->dev,
4343                             "QDIO data connection isolation is deactivated\n");
4344                 } else {
4345                         dev_info(&card->gdev->dev,
4346                             "QDIO data connection isolation is activated\n");
4347                 }
4348                 break;
4349         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4350                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4351                                 "deactivated\n", dev_name(&card->gdev->dev));
4352                 if (fallback)
4353                         card->options.isolation = card->options.prev_isolation;
4354                 break;
4355         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4356                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4357                                 " activated\n", dev_name(&card->gdev->dev));
4358                 if (fallback)
4359                         card->options.isolation = card->options.prev_isolation;
4360                 break;
4361         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4362                 dev_err(&card->gdev->dev, "Adapter does not "
4363                         "support QDIO data connection isolation\n");
4364                 break;
4365         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4366                 dev_err(&card->gdev->dev,
4367                         "Adapter is dedicated. "
4368                         "QDIO data connection isolation not supported\n");
4369                 if (fallback)
4370                         card->options.isolation = card->options.prev_isolation;
4371                 break;
4372         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4373                 dev_err(&card->gdev->dev,
4374                         "TSO does not permit QDIO data connection isolation\n");
4375                 if (fallback)
4376                         card->options.isolation = card->options.prev_isolation;
4377                 break;
4378         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4379                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4380                         "support reflective relay mode\n");
4381                 if (fallback)
4382                         card->options.isolation = card->options.prev_isolation;
4383                 break;
4384         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4385                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4386                                         "enabled at the adjacent switch port");
4387                 if (fallback)
4388                         card->options.isolation = card->options.prev_isolation;
4389                 break;
4390         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4391                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4392                                         "at the adjacent switch failed\n");
4393                 break;
4394         default:
4395                 /* this should never happen */
4396                 if (fallback)
4397                         card->options.isolation = card->options.prev_isolation;
4398                 break;
4399         }
4400         return 0;
4401 }
4402
4403 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4404                 enum qeth_ipa_isolation_modes isolation, int fallback)
4405 {
4406         int rc;
4407         struct qeth_cmd_buffer *iob;
4408         struct qeth_ipa_cmd *cmd;
4409         struct qeth_set_access_ctrl *access_ctrl_req;
4410
4411         QETH_CARD_TEXT(card, 4, "setacctl");
4412
4413         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4414         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4415
4416         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4417                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4418                                    sizeof(struct qeth_set_access_ctrl));
4419         if (!iob)
4420                 return -ENOMEM;
4421         cmd = __ipa_cmd(iob);
4422         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4423         access_ctrl_req->subcmd_code = isolation;
4424
4425         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4426                                &fallback);
4427         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4428         return rc;
4429 }
4430
4431 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4432 {
4433         int rc = 0;
4434
4435         QETH_CARD_TEXT(card, 4, "setactlo");
4436
4437         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4438              card->info.type == QETH_CARD_TYPE_OSX) &&
4439              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4440                 rc = qeth_setadpparms_set_access_ctrl(card,
4441                         card->options.isolation, fallback);
4442                 if (rc) {
4443                         QETH_DBF_MESSAGE(3,
4444                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4445                                 card->gdev->dev.kobj.name,
4446                                 rc);
4447                         rc = -EOPNOTSUPP;
4448                 }
4449         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4450                 card->options.isolation = ISOLATION_MODE_NONE;
4451
4452                 dev_err(&card->gdev->dev, "Adapter does not "
4453                         "support QDIO data connection isolation\n");
4454                 rc = -EOPNOTSUPP;
4455         }
4456         return rc;
4457 }
4458 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4459
4460 void qeth_tx_timeout(struct net_device *dev)
4461 {
4462         struct qeth_card *card;
4463
4464         card = dev->ml_priv;
4465         QETH_CARD_TEXT(card, 4, "txtimeo");
4466         card->stats.tx_errors++;
4467         qeth_schedule_recovery(card);
4468 }
4469 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4470
4471 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4472 {
4473         struct qeth_card *card = dev->ml_priv;
4474         int rc = 0;
4475
4476         switch (regnum) {
4477         case MII_BMCR: /* Basic mode control register */
4478                 rc = BMCR_FULLDPLX;
4479                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4480                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4481                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4482                         rc |= BMCR_SPEED100;
4483                 break;
4484         case MII_BMSR: /* Basic mode status register */
4485                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4486                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4487                      BMSR_100BASE4;
4488                 break;
4489         case MII_PHYSID1: /* PHYS ID 1 */
4490                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4491                      dev->dev_addr[2];
4492                 rc = (rc >> 5) & 0xFFFF;
4493                 break;
4494         case MII_PHYSID2: /* PHYS ID 2 */
4495                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4496                 break;
4497         case MII_ADVERTISE: /* Advertisement control reg */
4498                 rc = ADVERTISE_ALL;
4499                 break;
4500         case MII_LPA: /* Link partner ability reg */
4501                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4502                      LPA_100BASE4 | LPA_LPACK;
4503                 break;
4504         case MII_EXPANSION: /* Expansion register */
4505                 break;
4506         case MII_DCOUNTER: /* disconnect counter */
4507                 break;
4508         case MII_FCSCOUNTER: /* false carrier counter */
4509                 break;
4510         case MII_NWAYTEST: /* N-way auto-neg test register */
4511                 break;
4512         case MII_RERRCOUNTER: /* rx error counter */
4513                 rc = card->stats.rx_errors;
4514                 break;
4515         case MII_SREVISION: /* silicon revision */
4516                 break;
4517         case MII_RESV1: /* reserved 1 */
4518                 break;
4519         case MII_LBRERROR: /* loopback, rx, bypass error */
4520                 break;
4521         case MII_PHYADDR: /* physical address */
4522                 break;
4523         case MII_RESV2: /* reserved 2 */
4524                 break;
4525         case MII_TPISTATUS: /* TPI status for 10mbps */
4526                 break;
4527         case MII_NCONFIG: /* network interface config */
4528                 break;
4529         default:
4530                 break;
4531         }
4532         return rc;
4533 }
4534
4535 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4536                 struct qeth_cmd_buffer *iob, int len,
4537                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4538                         unsigned long),
4539                 void *reply_param)
4540 {
4541         u16 s1, s2;
4542
4543         QETH_CARD_TEXT(card, 4, "sendsnmp");
4544
4545         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4546         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4547                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4548         /* adjust PDU length fields in IPA_PDU_HEADER */
4549         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4550         s2 = (u32) len;
4551         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4552         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4553         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4554         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4555         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4556                                       reply_cb, reply_param);
4557 }
4558
4559 static int qeth_snmp_command_cb(struct qeth_card *card,
4560                 struct qeth_reply *reply, unsigned long sdata)
4561 {
4562         struct qeth_ipa_cmd *cmd;
4563         struct qeth_arp_query_info *qinfo;
4564         struct qeth_snmp_cmd *snmp;
4565         unsigned char *data;
4566         __u16 data_len;
4567
4568         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4569
4570         cmd = (struct qeth_ipa_cmd *) sdata;
4571         data = (unsigned char *)((char *)cmd - reply->offset);
4572         qinfo = (struct qeth_arp_query_info *) reply->param;
4573         snmp = &cmd->data.setadapterparms.data.snmp;
4574
4575         if (cmd->hdr.return_code) {
4576                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4577                 return 0;
4578         }
4579         if (cmd->data.setadapterparms.hdr.return_code) {
4580                 cmd->hdr.return_code =
4581                         cmd->data.setadapterparms.hdr.return_code;
4582                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4583                 return 0;
4584         }
4585         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4586         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4587                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4588         else
4589                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4590
4591         /* check if there is enough room in userspace */
4592         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4593                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4594                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4595                 return 0;
4596         }
4597         QETH_CARD_TEXT_(card, 4, "snore%i",
4598                        cmd->data.setadapterparms.hdr.used_total);
4599         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4600                 cmd->data.setadapterparms.hdr.seq_no);
4601         /*copy entries to user buffer*/
4602         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4603                 memcpy(qinfo->udata + qinfo->udata_offset,
4604                        (char *)snmp,
4605                        data_len + offsetof(struct qeth_snmp_cmd, data));
4606                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4607         } else {
4608                 memcpy(qinfo->udata + qinfo->udata_offset,
4609                        (char *)&snmp->request, data_len);
4610         }
4611         qinfo->udata_offset += data_len;
4612         /* check if all replies received ... */
4613                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4614                                cmd->data.setadapterparms.hdr.used_total);
4615                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4616                                cmd->data.setadapterparms.hdr.seq_no);
4617         if (cmd->data.setadapterparms.hdr.seq_no <
4618             cmd->data.setadapterparms.hdr.used_total)
4619                 return 1;
4620         return 0;
4621 }
4622
4623 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4624 {
4625         struct qeth_cmd_buffer *iob;
4626         struct qeth_ipa_cmd *cmd;
4627         struct qeth_snmp_ureq *ureq;
4628         unsigned int req_len;
4629         struct qeth_arp_query_info qinfo = {0, };
4630         int rc = 0;
4631
4632         QETH_CARD_TEXT(card, 3, "snmpcmd");
4633
4634         if (card->info.guestlan)
4635                 return -EOPNOTSUPP;
4636
4637         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4638             (!card->options.layer2)) {
4639                 return -EOPNOTSUPP;
4640         }
4641         /* skip 4 bytes (data_len struct member) to get req_len */
4642         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4643                 return -EFAULT;
4644         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4645                        sizeof(struct qeth_ipacmd_hdr) -
4646                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4647                 return -EINVAL;
4648         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4649         if (IS_ERR(ureq)) {
4650                 QETH_CARD_TEXT(card, 2, "snmpnome");
4651                 return PTR_ERR(ureq);
4652         }
4653         qinfo.udata_len = ureq->hdr.data_len;
4654         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4655         if (!qinfo.udata) {
4656                 kfree(ureq);
4657                 return -ENOMEM;
4658         }
4659         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4660
4661         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4662                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4663         if (!iob) {
4664                 rc = -ENOMEM;
4665                 goto out;
4666         }
4667         cmd = __ipa_cmd(iob);
4668         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4669         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4670                                     qeth_snmp_command_cb, (void *)&qinfo);
4671         if (rc)
4672                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4673                            QETH_CARD_IFNAME(card), rc);
4674         else {
4675                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4676                         rc = -EFAULT;
4677         }
4678 out:
4679         kfree(ureq);
4680         kfree(qinfo.udata);
4681         return rc;
4682 }
4683
4684 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4685                 struct qeth_reply *reply, unsigned long data)
4686 {
4687         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4688         struct qeth_qoat_priv *priv;
4689         char *resdata;
4690         int resdatalen;
4691
4692         QETH_CARD_TEXT(card, 3, "qoatcb");
4693         if (qeth_setadpparms_inspect_rc(cmd))
4694                 return 0;
4695
4696         priv = (struct qeth_qoat_priv *)reply->param;
4697         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4698         resdata = (char *)data + 28;
4699
4700         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4701                 cmd->hdr.return_code = IPA_RC_FFFF;
4702                 return 0;
4703         }
4704
4705         memcpy((priv->buffer + priv->response_len), resdata,
4706                 resdatalen);
4707         priv->response_len += resdatalen;
4708
4709         if (cmd->data.setadapterparms.hdr.seq_no <
4710             cmd->data.setadapterparms.hdr.used_total)
4711                 return 1;
4712         return 0;
4713 }
4714
4715 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4716 {
4717         int rc = 0;
4718         struct qeth_cmd_buffer *iob;
4719         struct qeth_ipa_cmd *cmd;
4720         struct qeth_query_oat *oat_req;
4721         struct qeth_query_oat_data oat_data;
4722         struct qeth_qoat_priv priv;
4723         void __user *tmp;
4724
4725         QETH_CARD_TEXT(card, 3, "qoatcmd");
4726
4727         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4728                 rc = -EOPNOTSUPP;
4729                 goto out;
4730         }
4731
4732         if (copy_from_user(&oat_data, udata,
4733             sizeof(struct qeth_query_oat_data))) {
4734                         rc = -EFAULT;
4735                         goto out;
4736         }
4737
4738         priv.buffer_len = oat_data.buffer_len;
4739         priv.response_len = 0;
4740         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4741         if (!priv.buffer) {
4742                 rc = -ENOMEM;
4743                 goto out;
4744         }
4745
4746         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4747                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4748                                    sizeof(struct qeth_query_oat));
4749         if (!iob) {
4750                 rc = -ENOMEM;
4751                 goto out_free;
4752         }
4753         cmd = __ipa_cmd(iob);
4754         oat_req = &cmd->data.setadapterparms.data.query_oat;
4755         oat_req->subcmd_code = oat_data.command;
4756
4757         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4758                                &priv);
4759         if (!rc) {
4760                 if (is_compat_task())
4761                         tmp = compat_ptr(oat_data.ptr);
4762                 else
4763                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4764
4765                 if (copy_to_user(tmp, priv.buffer,
4766                     priv.response_len)) {
4767                         rc = -EFAULT;
4768                         goto out_free;
4769                 }
4770
4771                 oat_data.response_len = priv.response_len;
4772
4773                 if (copy_to_user(udata, &oat_data,
4774                     sizeof(struct qeth_query_oat_data)))
4775                         rc = -EFAULT;
4776         } else
4777                 if (rc == IPA_RC_FFFF)
4778                         rc = -EFAULT;
4779
4780 out_free:
4781         kfree(priv.buffer);
4782 out:
4783         return rc;
4784 }
4785
4786 static int qeth_query_card_info_cb(struct qeth_card *card,
4787                                    struct qeth_reply *reply, unsigned long data)
4788 {
4789         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4790         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4791         struct qeth_query_card_info *card_info;
4792
4793         QETH_CARD_TEXT(card, 2, "qcrdincb");
4794         if (qeth_setadpparms_inspect_rc(cmd))
4795                 return 0;
4796
4797         card_info = &cmd->data.setadapterparms.data.card_info;
4798         carrier_info->card_type = card_info->card_type;
4799         carrier_info->port_mode = card_info->port_mode;
4800         carrier_info->port_speed = card_info->port_speed;
4801         return 0;
4802 }
4803
4804 static int qeth_query_card_info(struct qeth_card *card,
4805                                 struct carrier_info *carrier_info)
4806 {
4807         struct qeth_cmd_buffer *iob;
4808
4809         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4810         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4811                 return -EOPNOTSUPP;
4812         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4813                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4814         if (!iob)
4815                 return -ENOMEM;
4816         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4817                                         (void *)carrier_info);
4818 }
4819
4820 /**
4821  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4822  * @card: pointer to a qeth_card
4823  *
4824  * Returns
4825  *      0, if a MAC address has been set for the card's netdevice
4826  *      a return code, for various error conditions
4827  */
4828 int qeth_vm_request_mac(struct qeth_card *card)
4829 {
4830         struct diag26c_mac_resp *response;
4831         struct diag26c_mac_req *request;
4832         struct ccw_dev_id id;
4833         int rc;
4834
4835         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4836
4837         if (!card->dev)
4838                 return -ENODEV;
4839
4840         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4841         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4842         if (!request || !response) {
4843                 rc = -ENOMEM;
4844                 goto out;
4845         }
4846
4847         ccw_device_get_id(CARD_DDEV(card), &id);
4848         request->resp_buf_len = sizeof(*response);
4849         request->resp_version = DIAG26C_VERSION2;
4850         request->op_code = DIAG26C_GET_MAC;
4851         request->devno = id.devno;
4852
4853         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4854         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4855         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4856         if (rc)
4857                 goto out;
4858         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4859
4860         if (request->resp_buf_len < sizeof(*response) ||
4861             response->version != request->resp_version) {
4862                 rc = -EIO;
4863                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4864                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4865                              sizeof(request->resp_buf_len));
4866         } else if (!is_valid_ether_addr(response->mac)) {
4867                 rc = -EINVAL;
4868                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4869                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4870         } else {
4871                 ether_addr_copy(card->dev->dev_addr, response->mac);
4872         }
4873
4874 out:
4875         kfree(response);
4876         kfree(request);
4877         return rc;
4878 }
4879 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4880
4881 static int qeth_get_qdio_q_format(struct qeth_card *card)
4882 {
4883         if (card->info.type == QETH_CARD_TYPE_IQD)
4884                 return QDIO_IQDIO_QFMT;
4885         else
4886                 return QDIO_QETH_QFMT;
4887 }
4888
4889 static void qeth_determine_capabilities(struct qeth_card *card)
4890 {
4891         int rc;
4892         int length;
4893         char *prcd;
4894         struct ccw_device *ddev;
4895         int ddev_offline = 0;
4896
4897         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4898         ddev = CARD_DDEV(card);
4899         if (!ddev->online) {
4900                 ddev_offline = 1;
4901                 rc = ccw_device_set_online(ddev);
4902                 if (rc) {
4903                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4904                         goto out;
4905                 }
4906         }
4907
4908         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4909         if (rc) {
4910                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4911                         dev_name(&card->gdev->dev), rc);
4912                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4913                 goto out_offline;
4914         }
4915         qeth_configure_unitaddr(card, prcd);
4916         if (ddev_offline)
4917                 qeth_configure_blkt_default(card, prcd);
4918         kfree(prcd);
4919
4920         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4921         if (rc)
4922                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4923
4924         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4925         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4926         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4927         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4928         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4929         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4930             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4931             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4932                 dev_info(&card->gdev->dev,
4933                         "Completion Queueing supported\n");
4934         } else {
4935                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4936         }
4937
4938
4939 out_offline:
4940         if (ddev_offline == 1)
4941                 ccw_device_set_offline(ddev);
4942 out:
4943         return;
4944 }
4945
4946 static void qeth_qdio_establish_cq(struct qeth_card *card,
4947                                    struct qdio_buffer **in_sbal_ptrs,
4948                                    void (**queue_start_poll)
4949                                         (struct ccw_device *, int,
4950                                          unsigned long))
4951 {
4952         int i;
4953
4954         if (card->options.cq == QETH_CQ_ENABLED) {
4955                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4956                              (card->qdio.no_in_queues - 1);
4957                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4958                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4959                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4960                 }
4961
4962                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4963         }
4964 }
4965
4966 static int qeth_qdio_establish(struct qeth_card *card)
4967 {
4968         struct qdio_initialize init_data;
4969         char *qib_param_field;
4970         struct qdio_buffer **in_sbal_ptrs;
4971         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4972         struct qdio_buffer **out_sbal_ptrs;
4973         int i, j, k;
4974         int rc = 0;
4975
4976         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4977
4978         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4979                                   GFP_KERNEL);
4980         if (!qib_param_field) {
4981                 rc =  -ENOMEM;
4982                 goto out_free_nothing;
4983         }
4984
4985         qeth_create_qib_param_field(card, qib_param_field);
4986         qeth_create_qib_param_field_blkt(card, qib_param_field);
4987
4988         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4989                                sizeof(void *),
4990                                GFP_KERNEL);
4991         if (!in_sbal_ptrs) {
4992                 rc = -ENOMEM;
4993                 goto out_free_qib_param;
4994         }
4995         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4996                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4997                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4998         }
4999
5000         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
5001                                    GFP_KERNEL);
5002         if (!queue_start_poll) {
5003                 rc = -ENOMEM;
5004                 goto out_free_in_sbals;
5005         }
5006         for (i = 0; i < card->qdio.no_in_queues; ++i)
5007                 queue_start_poll[i] = qeth_qdio_start_poll;
5008
5009         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
5010
5011         out_sbal_ptrs =
5012                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
5013                         sizeof(void *),
5014                         GFP_KERNEL);
5015         if (!out_sbal_ptrs) {
5016                 rc = -ENOMEM;
5017                 goto out_free_queue_start_poll;
5018         }
5019         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
5020                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
5021                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
5022                                 card->qdio.out_qs[i]->bufs[j]->buffer);
5023                 }
5024
5025         memset(&init_data, 0, sizeof(struct qdio_initialize));
5026         init_data.cdev                   = CARD_DDEV(card);
5027         init_data.q_format               = qeth_get_qdio_q_format(card);
5028         init_data.qib_param_field_format = 0;
5029         init_data.qib_param_field        = qib_param_field;
5030         init_data.no_input_qs            = card->qdio.no_in_queues;
5031         init_data.no_output_qs           = card->qdio.no_out_queues;
5032         init_data.input_handler          = qeth_qdio_input_handler;
5033         init_data.output_handler         = qeth_qdio_output_handler;
5034         init_data.queue_start_poll_array = queue_start_poll;
5035         init_data.int_parm               = (unsigned long) card;
5036         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
5037         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
5038         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5039         init_data.scan_threshold =
5040                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5041
5042         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5043                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5044                 rc = qdio_allocate(&init_data);
5045                 if (rc) {
5046                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5047                         goto out;
5048                 }
5049                 rc = qdio_establish(&init_data);
5050                 if (rc) {
5051                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5052                         qdio_free(CARD_DDEV(card));
5053                 }
5054         }
5055
5056         switch (card->options.cq) {
5057         case QETH_CQ_ENABLED:
5058                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5059                 break;
5060         case QETH_CQ_DISABLED:
5061                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5062                 break;
5063         default:
5064                 break;
5065         }
5066 out:
5067         kfree(out_sbal_ptrs);
5068 out_free_queue_start_poll:
5069         kfree(queue_start_poll);
5070 out_free_in_sbals:
5071         kfree(in_sbal_ptrs);
5072 out_free_qib_param:
5073         kfree(qib_param_field);
5074 out_free_nothing:
5075         return rc;
5076 }
5077
5078 static void qeth_core_free_card(struct qeth_card *card)
5079 {
5080
5081         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5082         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5083         qeth_clean_channel(&card->read);
5084         qeth_clean_channel(&card->write);
5085         qeth_free_qdio_buffers(card);
5086         unregister_service_level(&card->qeth_service_level);
5087         kfree(card);
5088 }
5089
5090 void qeth_trace_features(struct qeth_card *card)
5091 {
5092         QETH_CARD_TEXT(card, 2, "features");
5093         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5094         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5095         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5096         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5097                       sizeof(card->info.diagass_support));
5098 }
5099 EXPORT_SYMBOL_GPL(qeth_trace_features);
5100
5101 static struct ccw_device_id qeth_ids[] = {
5102         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5103                                         .driver_info = QETH_CARD_TYPE_OSD},
5104         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5105                                         .driver_info = QETH_CARD_TYPE_IQD},
5106         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5107                                         .driver_info = QETH_CARD_TYPE_OSN},
5108         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5109                                         .driver_info = QETH_CARD_TYPE_OSM},
5110         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5111                                         .driver_info = QETH_CARD_TYPE_OSX},
5112         {},
5113 };
5114 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5115
5116 static struct ccw_driver qeth_ccw_driver = {
5117         .driver = {
5118                 .owner = THIS_MODULE,
5119                 .name = "qeth",
5120         },
5121         .ids = qeth_ids,
5122         .probe = ccwgroup_probe_ccwdev,
5123         .remove = ccwgroup_remove_ccwdev,
5124 };
5125
5126 int qeth_core_hardsetup_card(struct qeth_card *card)
5127 {
5128         int retries = 3;
5129         int rc;
5130
5131         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5132         atomic_set(&card->force_alloc_skb, 0);
5133         qeth_update_from_chp_desc(card);
5134 retry:
5135         if (retries < 3)
5136                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5137                         dev_name(&card->gdev->dev));
5138         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5139         ccw_device_set_offline(CARD_DDEV(card));
5140         ccw_device_set_offline(CARD_WDEV(card));
5141         ccw_device_set_offline(CARD_RDEV(card));
5142         qdio_free(CARD_DDEV(card));
5143         rc = ccw_device_set_online(CARD_RDEV(card));
5144         if (rc)
5145                 goto retriable;
5146         rc = ccw_device_set_online(CARD_WDEV(card));
5147         if (rc)
5148                 goto retriable;
5149         rc = ccw_device_set_online(CARD_DDEV(card));
5150         if (rc)
5151                 goto retriable;
5152 retriable:
5153         if (rc == -ERESTARTSYS) {
5154                 QETH_DBF_TEXT(SETUP, 2, "break1");
5155                 return rc;
5156         } else if (rc) {
5157                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5158                 if (--retries < 0)
5159                         goto out;
5160                 else
5161                         goto retry;
5162         }
5163         qeth_determine_capabilities(card);
5164         qeth_init_tokens(card);
5165         qeth_init_func_level(card);
5166         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5167         if (rc == -ERESTARTSYS) {
5168                 QETH_DBF_TEXT(SETUP, 2, "break2");
5169                 return rc;
5170         } else if (rc) {
5171                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5172                 if (--retries < 0)
5173                         goto out;
5174                 else
5175                         goto retry;
5176         }
5177         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5178         if (rc == -ERESTARTSYS) {
5179                 QETH_DBF_TEXT(SETUP, 2, "break3");
5180                 return rc;
5181         } else if (rc) {
5182                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5183                 if (--retries < 0)
5184                         goto out;
5185                 else
5186                         goto retry;
5187         }
5188         card->read_or_write_problem = 0;
5189         rc = qeth_mpc_initialize(card);
5190         if (rc) {
5191                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5192                 goto out;
5193         }
5194
5195         rc = qeth_send_startlan(card);
5196         if (rc) {
5197                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5198                 if (rc == IPA_RC_LAN_OFFLINE) {
5199                         dev_warn(&card->gdev->dev,
5200                                 "The LAN is offline\n");
5201                         card->lan_online = 0;
5202                 } else {
5203                         rc = -ENODEV;
5204                         goto out;
5205                 }
5206         } else
5207                 card->lan_online = 1;
5208
5209         card->options.ipa4.supported_funcs = 0;
5210         card->options.ipa6.supported_funcs = 0;
5211         card->options.adp.supported_funcs = 0;
5212         card->options.sbp.supported_funcs = 0;
5213         card->info.diagass_support = 0;
5214         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5215         if (rc == -ENOMEM)
5216                 goto out;
5217         if (qeth_is_supported(card, IPA_IPV6)) {
5218                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5219                 if (rc == -ENOMEM)
5220                         goto out;
5221         }
5222         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5223                 rc = qeth_query_setadapterparms(card);
5224                 if (rc < 0) {
5225                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5226                         goto out;
5227                 }
5228         }
5229         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5230                 rc = qeth_query_setdiagass(card);
5231                 if (rc < 0) {
5232                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5233                         goto out;
5234                 }
5235         }
5236         return 0;
5237 out:
5238         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5239                 "an error on the device\n");
5240         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5241                 dev_name(&card->gdev->dev), rc);
5242         return rc;
5243 }
5244 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5245
5246 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5247                                  struct sk_buff *skb, int offset, int data_len)
5248 {
5249         struct page *page = virt_to_page(element->addr);
5250         unsigned int next_frag;
5251
5252         /* first fill the linear space */
5253         if (!skb->len) {
5254                 unsigned int linear = min(data_len, skb_tailroom(skb));
5255
5256                 skb_put_data(skb, element->addr + offset, linear);
5257                 data_len -= linear;
5258                 if (!data_len)
5259                         return;
5260                 offset += linear;
5261                 /* fall through to add page frag for remaining data */
5262         }
5263
5264         next_frag = skb_shinfo(skb)->nr_frags;
5265         get_page(page);
5266         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5267 }
5268
5269 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5270 {
5271         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5272 }
5273
5274 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5275                 struct qeth_qdio_buffer *qethbuffer,
5276                 struct qdio_buffer_element **__element, int *__offset,
5277                 struct qeth_hdr **hdr)
5278 {
5279         struct qdio_buffer_element *element = *__element;
5280         struct qdio_buffer *buffer = qethbuffer->buffer;
5281         int offset = *__offset;
5282         struct sk_buff *skb;
5283         int skb_len = 0;
5284         void *data_ptr;
5285         int data_len;
5286         int headroom = 0;
5287         int use_rx_sg = 0;
5288
5289         /* qeth_hdr must not cross element boundaries */
5290         while (element->length < offset + sizeof(struct qeth_hdr)) {
5291                 if (qeth_is_last_sbale(element))
5292                         return NULL;
5293                 element++;
5294                 offset = 0;
5295         }
5296         *hdr = element->addr + offset;
5297
5298         offset += sizeof(struct qeth_hdr);
5299         switch ((*hdr)->hdr.l2.id) {
5300         case QETH_HEADER_TYPE_LAYER2:
5301                 skb_len = (*hdr)->hdr.l2.pkt_length;
5302                 break;
5303         case QETH_HEADER_TYPE_LAYER3:
5304                 skb_len = (*hdr)->hdr.l3.length;
5305                 headroom = ETH_HLEN;
5306                 break;
5307         case QETH_HEADER_TYPE_OSN:
5308                 skb_len = (*hdr)->hdr.osn.pdu_length;
5309                 headroom = sizeof(struct qeth_hdr);
5310                 break;
5311         default:
5312                 break;
5313         }
5314
5315         if (!skb_len)
5316                 return NULL;
5317
5318         if (((skb_len >= card->options.rx_sg_cb) &&
5319              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5320              (!atomic_read(&card->force_alloc_skb))) ||
5321             (card->options.cq == QETH_CQ_ENABLED))
5322                 use_rx_sg = 1;
5323
5324         if (use_rx_sg && qethbuffer->rx_skb) {
5325                 /* QETH_CQ_ENABLED only: */
5326                 skb = qethbuffer->rx_skb;
5327                 qethbuffer->rx_skb = NULL;
5328         } else {
5329                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5330
5331                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5332         }
5333         if (!skb)
5334                 goto no_mem;
5335         if (headroom)
5336                 skb_reserve(skb, headroom);
5337
5338         data_ptr = element->addr + offset;
5339         while (skb_len) {
5340                 data_len = min(skb_len, (int)(element->length - offset));
5341                 if (data_len) {
5342                         if (use_rx_sg)
5343                                 qeth_create_skb_frag(element, skb, offset,
5344                                                      data_len);
5345                         else
5346                                 skb_put_data(skb, data_ptr, data_len);
5347                 }
5348                 skb_len -= data_len;
5349                 if (skb_len) {
5350                         if (qeth_is_last_sbale(element)) {
5351                                 QETH_CARD_TEXT(card, 4, "unexeob");
5352                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5353                                 dev_kfree_skb_any(skb);
5354                                 card->stats.rx_errors++;
5355                                 return NULL;
5356                         }
5357                         element++;
5358                         offset = 0;
5359                         data_ptr = element->addr;
5360                 } else {
5361                         offset += data_len;
5362                 }
5363         }
5364         *__element = element;
5365         *__offset = offset;
5366         if (use_rx_sg && card->options.performance_stats) {
5367                 card->perf_stats.sg_skbs_rx++;
5368                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5369         }
5370         return skb;
5371 no_mem:
5372         if (net_ratelimit()) {
5373                 QETH_CARD_TEXT(card, 2, "noskbmem");
5374         }
5375         card->stats.rx_dropped++;
5376         return NULL;
5377 }
5378 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5379
5380 int qeth_poll(struct napi_struct *napi, int budget)
5381 {
5382         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5383         int work_done = 0;
5384         struct qeth_qdio_buffer *buffer;
5385         int done;
5386         int new_budget = budget;
5387
5388         if (card->options.performance_stats) {
5389                 card->perf_stats.inbound_cnt++;
5390                 card->perf_stats.inbound_start_time = qeth_get_micros();
5391         }
5392
5393         while (1) {
5394                 if (!card->rx.b_count) {
5395                         card->rx.qdio_err = 0;
5396                         card->rx.b_count = qdio_get_next_buffers(
5397                                 card->data.ccwdev, 0, &card->rx.b_index,
5398                                 &card->rx.qdio_err);
5399                         if (card->rx.b_count <= 0) {
5400                                 card->rx.b_count = 0;
5401                                 break;
5402                         }
5403                         card->rx.b_element =
5404                                 &card->qdio.in_q->bufs[card->rx.b_index]
5405                                 .buffer->element[0];
5406                         card->rx.e_offset = 0;
5407                 }
5408
5409                 while (card->rx.b_count) {
5410                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5411                         if (!(card->rx.qdio_err &&
5412                             qeth_check_qdio_errors(card, buffer->buffer,
5413                             card->rx.qdio_err, "qinerr")))
5414                                 work_done +=
5415                                         card->discipline->process_rx_buffer(
5416                                                 card, new_budget, &done);
5417                         else
5418                                 done = 1;
5419
5420                         if (done) {
5421                                 if (card->options.performance_stats)
5422                                         card->perf_stats.bufs_rec++;
5423                                 qeth_put_buffer_pool_entry(card,
5424                                         buffer->pool_entry);
5425                                 qeth_queue_input_buffer(card, card->rx.b_index);
5426                                 card->rx.b_count--;
5427                                 if (card->rx.b_count) {
5428                                         card->rx.b_index =
5429                                                 (card->rx.b_index + 1) %
5430                                                 QDIO_MAX_BUFFERS_PER_Q;
5431                                         card->rx.b_element =
5432                                                 &card->qdio.in_q
5433                                                 ->bufs[card->rx.b_index]
5434                                                 .buffer->element[0];
5435                                         card->rx.e_offset = 0;
5436                                 }
5437                         }
5438
5439                         if (work_done >= budget)
5440                                 goto out;
5441                         else
5442                                 new_budget = budget - work_done;
5443                 }
5444         }
5445
5446         napi_complete_done(napi, work_done);
5447         if (qdio_start_irq(card->data.ccwdev, 0))
5448                 napi_schedule(&card->napi);
5449 out:
5450         if (card->options.performance_stats)
5451                 card->perf_stats.inbound_time += qeth_get_micros() -
5452                         card->perf_stats.inbound_start_time;
5453         return work_done;
5454 }
5455 EXPORT_SYMBOL_GPL(qeth_poll);
5456
5457 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5458 {
5459         if (!cmd->hdr.return_code)
5460                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5461         return cmd->hdr.return_code;
5462 }
5463
5464 int qeth_setassparms_cb(struct qeth_card *card,
5465                         struct qeth_reply *reply, unsigned long data)
5466 {
5467         struct qeth_ipa_cmd *cmd;
5468
5469         QETH_CARD_TEXT(card, 4, "defadpcb");
5470
5471         cmd = (struct qeth_ipa_cmd *) data;
5472         if (cmd->hdr.return_code == 0) {
5473                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5474                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5475                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5476                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5477                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5478         }
5479         return 0;
5480 }
5481 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5482
5483 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5484                                                  enum qeth_ipa_funcs ipa_func,
5485                                                  __u16 cmd_code, __u16 len,
5486                                                  enum qeth_prot_versions prot)
5487 {
5488         struct qeth_cmd_buffer *iob;
5489         struct qeth_ipa_cmd *cmd;
5490
5491         QETH_CARD_TEXT(card, 4, "getasscm");
5492         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5493
5494         if (iob) {
5495                 cmd = __ipa_cmd(iob);
5496                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5497                 cmd->data.setassparms.hdr.length = 8 + len;
5498                 cmd->data.setassparms.hdr.command_code = cmd_code;
5499                 cmd->data.setassparms.hdr.return_code = 0;
5500                 cmd->data.setassparms.hdr.seq_no = 0;
5501         }
5502
5503         return iob;
5504 }
5505 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5506
5507 int qeth_send_setassparms(struct qeth_card *card,
5508                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5509                           int (*reply_cb)(struct qeth_card *,
5510                                           struct qeth_reply *, unsigned long),
5511                           void *reply_param)
5512 {
5513         int rc;
5514         struct qeth_ipa_cmd *cmd;
5515
5516         QETH_CARD_TEXT(card, 4, "sendassp");
5517
5518         cmd = __ipa_cmd(iob);
5519         if (len <= sizeof(__u32))
5520                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5521         else   /* (len > sizeof(__u32)) */
5522                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5523
5524         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5525         return rc;
5526 }
5527 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5528
5529 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5530                                       enum qeth_ipa_funcs ipa_func,
5531                                       u16 cmd_code, long data,
5532                                       enum qeth_prot_versions prot)
5533 {
5534         int rc;
5535         int length = 0;
5536         struct qeth_cmd_buffer *iob;
5537
5538         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5539         if (data)
5540                 length = sizeof(__u32);
5541         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5542         if (!iob)
5543                 return -ENOMEM;
5544         rc = qeth_send_setassparms(card, iob, length, data,
5545                                    qeth_setassparms_cb, NULL);
5546         return rc;
5547 }
5548 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5549
5550 static void qeth_unregister_dbf_views(void)
5551 {
5552         int x;
5553         for (x = 0; x < QETH_DBF_INFOS; x++) {
5554                 debug_unregister(qeth_dbf[x].id);
5555                 qeth_dbf[x].id = NULL;
5556         }
5557 }
5558
5559 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5560 {
5561         char dbf_txt_buf[32];
5562         va_list args;
5563
5564         if (!debug_level_enabled(id, level))
5565                 return;
5566         va_start(args, fmt);
5567         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5568         va_end(args);
5569         debug_text_event(id, level, dbf_txt_buf);
5570 }
5571 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5572
5573 static int qeth_register_dbf_views(void)
5574 {
5575         int ret;
5576         int x;
5577
5578         for (x = 0; x < QETH_DBF_INFOS; x++) {
5579                 /* register the areas */
5580                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5581                                                 qeth_dbf[x].pages,
5582                                                 qeth_dbf[x].areas,
5583                                                 qeth_dbf[x].len);
5584                 if (qeth_dbf[x].id == NULL) {
5585                         qeth_unregister_dbf_views();
5586                         return -ENOMEM;
5587                 }
5588
5589                 /* register a view */
5590                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5591                 if (ret) {
5592                         qeth_unregister_dbf_views();
5593                         return ret;
5594                 }
5595
5596                 /* set a passing level */
5597                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5598         }
5599
5600         return 0;
5601 }
5602
5603 int qeth_core_load_discipline(struct qeth_card *card,
5604                 enum qeth_discipline_id discipline)
5605 {
5606         int rc = 0;
5607
5608         mutex_lock(&qeth_mod_mutex);
5609         switch (discipline) {
5610         case QETH_DISCIPLINE_LAYER3:
5611                 card->discipline = try_then_request_module(
5612                         symbol_get(qeth_l3_discipline), "qeth_l3");
5613                 break;
5614         case QETH_DISCIPLINE_LAYER2:
5615                 card->discipline = try_then_request_module(
5616                         symbol_get(qeth_l2_discipline), "qeth_l2");
5617                 break;
5618         default:
5619                 break;
5620         }
5621
5622         if (!card->discipline) {
5623                 dev_err(&card->gdev->dev, "There is no kernel module to "
5624                         "support discipline %d\n", discipline);
5625                 rc = -EINVAL;
5626         }
5627         mutex_unlock(&qeth_mod_mutex);
5628         return rc;
5629 }
5630
5631 void qeth_core_free_discipline(struct qeth_card *card)
5632 {
5633         if (card->options.layer2)
5634                 symbol_put(qeth_l2_discipline);
5635         else
5636                 symbol_put(qeth_l3_discipline);
5637         card->discipline = NULL;
5638 }
5639
5640 const struct device_type qeth_generic_devtype = {
5641         .name = "qeth_generic",
5642         .groups = qeth_generic_attr_groups,
5643 };
5644 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5645
5646 static const struct device_type qeth_osn_devtype = {
5647         .name = "qeth_osn",
5648         .groups = qeth_osn_attr_groups,
5649 };
5650
5651 #define DBF_NAME_LEN    20
5652
5653 struct qeth_dbf_entry {
5654         char dbf_name[DBF_NAME_LEN];
5655         debug_info_t *dbf_info;
5656         struct list_head dbf_list;
5657 };
5658
5659 static LIST_HEAD(qeth_dbf_list);
5660 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5661
5662 static debug_info_t *qeth_get_dbf_entry(char *name)
5663 {
5664         struct qeth_dbf_entry *entry;
5665         debug_info_t *rc = NULL;
5666
5667         mutex_lock(&qeth_dbf_list_mutex);
5668         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5669                 if (strcmp(entry->dbf_name, name) == 0) {
5670                         rc = entry->dbf_info;
5671                         break;
5672                 }
5673         }
5674         mutex_unlock(&qeth_dbf_list_mutex);
5675         return rc;
5676 }
5677
5678 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5679 {
5680         struct qeth_dbf_entry *new_entry;
5681
5682         card->debug = debug_register(name, 2, 1, 8);
5683         if (!card->debug) {
5684                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5685                 goto err;
5686         }
5687         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5688                 goto err_dbg;
5689         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5690         if (!new_entry)
5691                 goto err_dbg;
5692         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5693         new_entry->dbf_info = card->debug;
5694         mutex_lock(&qeth_dbf_list_mutex);
5695         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5696         mutex_unlock(&qeth_dbf_list_mutex);
5697
5698         return 0;
5699
5700 err_dbg:
5701         debug_unregister(card->debug);
5702 err:
5703         return -ENOMEM;
5704 }
5705
5706 static void qeth_clear_dbf_list(void)
5707 {
5708         struct qeth_dbf_entry *entry, *tmp;
5709
5710         mutex_lock(&qeth_dbf_list_mutex);
5711         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5712                 list_del(&entry->dbf_list);
5713                 debug_unregister(entry->dbf_info);
5714                 kfree(entry);
5715         }
5716         mutex_unlock(&qeth_dbf_list_mutex);
5717 }
5718
5719 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5720 {
5721         struct qeth_card *card;
5722         struct device *dev;
5723         int rc;
5724         enum qeth_discipline_id enforced_disc;
5725         unsigned long flags;
5726         char dbf_name[DBF_NAME_LEN];
5727
5728         QETH_DBF_TEXT(SETUP, 2, "probedev");
5729
5730         dev = &gdev->dev;
5731         if (!get_device(dev))
5732                 return -ENODEV;
5733
5734         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5735
5736         card = qeth_alloc_card();
5737         if (!card) {
5738                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5739                 rc = -ENOMEM;
5740                 goto err_dev;
5741         }
5742
5743         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5744                 dev_name(&gdev->dev));
5745         card->debug = qeth_get_dbf_entry(dbf_name);
5746         if (!card->debug) {
5747                 rc = qeth_add_dbf_entry(card, dbf_name);
5748                 if (rc)
5749                         goto err_card;
5750         }
5751
5752         card->read.ccwdev  = gdev->cdev[0];
5753         card->write.ccwdev = gdev->cdev[1];
5754         card->data.ccwdev  = gdev->cdev[2];
5755         dev_set_drvdata(&gdev->dev, card);
5756         card->gdev = gdev;
5757         gdev->cdev[0]->handler = qeth_irq;
5758         gdev->cdev[1]->handler = qeth_irq;
5759         gdev->cdev[2]->handler = qeth_irq;
5760
5761         qeth_determine_card_type(card);
5762         rc = qeth_setup_card(card);
5763         if (rc) {
5764                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5765                 goto err_card;
5766         }
5767
5768         qeth_determine_capabilities(card);
5769         enforced_disc = qeth_enforce_discipline(card);
5770         switch (enforced_disc) {
5771         case QETH_DISCIPLINE_UNDETERMINED:
5772                 gdev->dev.type = &qeth_generic_devtype;
5773                 break;
5774         default:
5775                 card->info.layer_enforced = true;
5776                 rc = qeth_core_load_discipline(card, enforced_disc);
5777                 if (rc)
5778                         goto err_card;
5779
5780                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5781                                         ? card->discipline->devtype
5782                                         : &qeth_osn_devtype;
5783                 rc = card->discipline->setup(card->gdev);
5784                 if (rc)
5785                         goto err_disc;
5786                 break;
5787         }
5788
5789         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5790         list_add_tail(&card->list, &qeth_core_card_list.list);
5791         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5792         return 0;
5793
5794 err_disc:
5795         qeth_core_free_discipline(card);
5796 err_card:
5797         qeth_core_free_card(card);
5798 err_dev:
5799         put_device(dev);
5800         return rc;
5801 }
5802
5803 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5804 {
5805         unsigned long flags;
5806         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5807
5808         QETH_DBF_TEXT(SETUP, 2, "removedv");
5809
5810         if (card->discipline) {
5811                 card->discipline->remove(gdev);
5812                 qeth_core_free_discipline(card);
5813         }
5814
5815         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5816         list_del(&card->list);
5817         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5818         qeth_core_free_card(card);
5819         dev_set_drvdata(&gdev->dev, NULL);
5820         put_device(&gdev->dev);
5821         return;
5822 }
5823
5824 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5825 {
5826         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5827         int rc = 0;
5828         enum qeth_discipline_id def_discipline;
5829
5830         if (!card->discipline) {
5831                 if (card->info.type == QETH_CARD_TYPE_IQD)
5832                         def_discipline = QETH_DISCIPLINE_LAYER3;
5833                 else
5834                         def_discipline = QETH_DISCIPLINE_LAYER2;
5835                 rc = qeth_core_load_discipline(card, def_discipline);
5836                 if (rc)
5837                         goto err;
5838                 rc = card->discipline->setup(card->gdev);
5839                 if (rc) {
5840                         qeth_core_free_discipline(card);
5841                         goto err;
5842                 }
5843         }
5844         rc = card->discipline->set_online(gdev);
5845 err:
5846         return rc;
5847 }
5848
5849 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5850 {
5851         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5852         return card->discipline->set_offline(gdev);
5853 }
5854
5855 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5856 {
5857         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5858         qeth_set_allowed_threads(card, 0, 1);
5859         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5860                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5861         qeth_qdio_clear_card(card, 0);
5862         qeth_clear_qdio_buffers(card);
5863         qdio_free(CARD_DDEV(card));
5864 }
5865
5866 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5867 {
5868         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5869         if (card->discipline && card->discipline->freeze)
5870                 return card->discipline->freeze(gdev);
5871         return 0;
5872 }
5873
5874 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5875 {
5876         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5877         if (card->discipline && card->discipline->thaw)
5878                 return card->discipline->thaw(gdev);
5879         return 0;
5880 }
5881
5882 static int qeth_core_restore(struct ccwgroup_device *gdev)
5883 {
5884         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5885         if (card->discipline && card->discipline->restore)
5886                 return card->discipline->restore(gdev);
5887         return 0;
5888 }
5889
5890 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5891         .driver = {
5892                 .owner = THIS_MODULE,
5893                 .name = "qeth",
5894         },
5895         .ccw_driver = &qeth_ccw_driver,
5896         .setup = qeth_core_probe_device,
5897         .remove = qeth_core_remove_device,
5898         .set_online = qeth_core_set_online,
5899         .set_offline = qeth_core_set_offline,
5900         .shutdown = qeth_core_shutdown,
5901         .prepare = NULL,
5902         .complete = NULL,
5903         .freeze = qeth_core_freeze,
5904         .thaw = qeth_core_thaw,
5905         .restore = qeth_core_restore,
5906 };
5907
5908 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5909                            size_t count)
5910 {
5911         int err;
5912
5913         err = ccwgroup_create_dev(qeth_core_root_dev,
5914                                   &qeth_core_ccwgroup_driver, 3, buf);
5915
5916         return err ? err : count;
5917 }
5918 static DRIVER_ATTR_WO(group);
5919
5920 static struct attribute *qeth_drv_attrs[] = {
5921         &driver_attr_group.attr,
5922         NULL,
5923 };
5924 static struct attribute_group qeth_drv_attr_group = {
5925         .attrs = qeth_drv_attrs,
5926 };
5927 static const struct attribute_group *qeth_drv_attr_groups[] = {
5928         &qeth_drv_attr_group,
5929         NULL,
5930 };
5931
5932 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5933 {
5934         struct qeth_card *card = dev->ml_priv;
5935         struct mii_ioctl_data *mii_data;
5936         int rc = 0;
5937
5938         if (!card)
5939                 return -ENODEV;
5940
5941         if (!qeth_card_hw_is_reachable(card))
5942                 return -ENODEV;
5943
5944         if (card->info.type == QETH_CARD_TYPE_OSN)
5945                 return -EPERM;
5946
5947         switch (cmd) {
5948         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5949                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5950                 break;
5951         case SIOC_QETH_GET_CARD_TYPE:
5952                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5953                      card->info.type == QETH_CARD_TYPE_OSM ||
5954                      card->info.type == QETH_CARD_TYPE_OSX) &&
5955                     !card->info.guestlan)
5956                         return 1;
5957                 else
5958                         return 0;
5959         case SIOCGMIIPHY:
5960                 mii_data = if_mii(rq);
5961                 mii_data->phy_id = 0;
5962                 break;
5963         case SIOCGMIIREG:
5964                 mii_data = if_mii(rq);
5965                 if (mii_data->phy_id != 0)
5966                         rc = -EINVAL;
5967                 else
5968                         mii_data->val_out = qeth_mdio_read(dev,
5969                                 mii_data->phy_id, mii_data->reg_num);
5970                 break;
5971         case SIOC_QETH_QUERY_OAT:
5972                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5973                 break;
5974         default:
5975                 if (card->discipline->do_ioctl)
5976                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5977                 else
5978                         rc = -EOPNOTSUPP;
5979         }
5980         if (rc)
5981                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5982         return rc;
5983 }
5984 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5985
5986 static struct {
5987         const char str[ETH_GSTRING_LEN];
5988 } qeth_ethtool_stats_keys[] = {
5989 /*  0 */{"rx skbs"},
5990         {"rx buffers"},
5991         {"tx skbs"},
5992         {"tx buffers"},
5993         {"tx skbs no packing"},
5994         {"tx buffers no packing"},
5995         {"tx skbs packing"},
5996         {"tx buffers packing"},
5997         {"tx sg skbs"},
5998         {"tx sg frags"},
5999 /* 10 */{"rx sg skbs"},
6000         {"rx sg frags"},
6001         {"rx sg page allocs"},
6002         {"tx large kbytes"},
6003         {"tx large count"},
6004         {"tx pk state ch n->p"},
6005         {"tx pk state ch p->n"},
6006         {"tx pk watermark low"},
6007         {"tx pk watermark high"},
6008         {"queue 0 buffer usage"},
6009 /* 20 */{"queue 1 buffer usage"},
6010         {"queue 2 buffer usage"},
6011         {"queue 3 buffer usage"},
6012         {"rx poll time"},
6013         {"rx poll count"},
6014         {"rx do_QDIO time"},
6015         {"rx do_QDIO count"},
6016         {"tx handler time"},
6017         {"tx handler count"},
6018         {"tx time"},
6019 /* 30 */{"tx count"},
6020         {"tx do_QDIO time"},
6021         {"tx do_QDIO count"},
6022         {"tx csum"},
6023         {"tx lin"},
6024         {"tx linfail"},
6025         {"cq handler count"},
6026         {"cq handler time"},
6027         {"rx csum"}
6028 };
6029
6030 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6031 {
6032         switch (stringset) {
6033         case ETH_SS_STATS:
6034                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6035         default:
6036                 return -EINVAL;
6037         }
6038 }
6039 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6040
6041 void qeth_core_get_ethtool_stats(struct net_device *dev,
6042                 struct ethtool_stats *stats, u64 *data)
6043 {
6044         struct qeth_card *card = dev->ml_priv;
6045         data[0] = card->stats.rx_packets -
6046                                 card->perf_stats.initial_rx_packets;
6047         data[1] = card->perf_stats.bufs_rec;
6048         data[2] = card->stats.tx_packets -
6049                                 card->perf_stats.initial_tx_packets;
6050         data[3] = card->perf_stats.bufs_sent;
6051         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6052                         - card->perf_stats.skbs_sent_pack;
6053         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6054         data[6] = card->perf_stats.skbs_sent_pack;
6055         data[7] = card->perf_stats.bufs_sent_pack;
6056         data[8] = card->perf_stats.sg_skbs_sent;
6057         data[9] = card->perf_stats.sg_frags_sent;
6058         data[10] = card->perf_stats.sg_skbs_rx;
6059         data[11] = card->perf_stats.sg_frags_rx;
6060         data[12] = card->perf_stats.sg_alloc_page_rx;
6061         data[13] = (card->perf_stats.large_send_bytes >> 10);
6062         data[14] = card->perf_stats.large_send_cnt;
6063         data[15] = card->perf_stats.sc_dp_p;
6064         data[16] = card->perf_stats.sc_p_dp;
6065         data[17] = QETH_LOW_WATERMARK_PACK;
6066         data[18] = QETH_HIGH_WATERMARK_PACK;
6067         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6068         data[20] = (card->qdio.no_out_queues > 1) ?
6069                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6070         data[21] = (card->qdio.no_out_queues > 2) ?
6071                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6072         data[22] = (card->qdio.no_out_queues > 3) ?
6073                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6074         data[23] = card->perf_stats.inbound_time;
6075         data[24] = card->perf_stats.inbound_cnt;
6076         data[25] = card->perf_stats.inbound_do_qdio_time;
6077         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6078         data[27] = card->perf_stats.outbound_handler_time;
6079         data[28] = card->perf_stats.outbound_handler_cnt;
6080         data[29] = card->perf_stats.outbound_time;
6081         data[30] = card->perf_stats.outbound_cnt;
6082         data[31] = card->perf_stats.outbound_do_qdio_time;
6083         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6084         data[33] = card->perf_stats.tx_csum;
6085         data[34] = card->perf_stats.tx_lin;
6086         data[35] = card->perf_stats.tx_linfail;
6087         data[36] = card->perf_stats.cq_cnt;
6088         data[37] = card->perf_stats.cq_time;
6089         data[38] = card->perf_stats.rx_csum;
6090 }
6091 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6092
6093 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6094 {
6095         switch (stringset) {
6096         case ETH_SS_STATS:
6097                 memcpy(data, &qeth_ethtool_stats_keys,
6098                         sizeof(qeth_ethtool_stats_keys));
6099                 break;
6100         default:
6101                 WARN_ON(1);
6102                 break;
6103         }
6104 }
6105 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6106
6107 void qeth_core_get_drvinfo(struct net_device *dev,
6108                 struct ethtool_drvinfo *info)
6109 {
6110         struct qeth_card *card = dev->ml_priv;
6111
6112         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
6113                 sizeof(info->driver));
6114         strlcpy(info->version, "1.0", sizeof(info->version));
6115         strlcpy(info->fw_version, card->info.mcl_level,
6116                 sizeof(info->fw_version));
6117         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6118                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6119 }
6120 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6121
6122 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6123 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6124 /* Always advertise and support all speeds up to specified, and only one     */
6125 /* specified port type.                                                      */
6126 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6127                                 int maxspeed, int porttype)
6128 {
6129         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6130         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6131         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6132
6133         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6134         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6135
6136         switch (porttype) {
6137         case PORT_TP:
6138                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6139                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6140                 break;
6141         case PORT_FIBRE:
6142                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6143                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6144                 break;
6145         default:
6146                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6147                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6148                 WARN_ON_ONCE(1);
6149         }
6150
6151         /* fallthrough from high to low, to select all legal speeds: */
6152         switch (maxspeed) {
6153         case SPEED_10000:
6154                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6155                                                      10000baseT_Full);
6156                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6157                                                      10000baseT_Full);
6158         case SPEED_1000:
6159                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6160                                                      1000baseT_Full);
6161                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6162                                                      1000baseT_Full);
6163                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6164                                                      1000baseT_Half);
6165                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6166                                                      1000baseT_Half);
6167         case SPEED_100:
6168                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6169                                                      100baseT_Full);
6170                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6171                                                      100baseT_Full);
6172                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6173                                                      100baseT_Half);
6174                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6175                                                      100baseT_Half);
6176         case SPEED_10:
6177                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6178                                                      10baseT_Full);
6179                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6180                                                      10baseT_Full);
6181                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6182                                                      10baseT_Half);
6183                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6184                                                      10baseT_Half);
6185                 /* end fallthrough */
6186                 break;
6187         default:
6188                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6189                                                      10baseT_Full);
6190                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6191                                                      10baseT_Full);
6192                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6193                                                      10baseT_Half);
6194                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6195                                                      10baseT_Half);
6196                 WARN_ON_ONCE(1);
6197         }
6198 }
6199
6200 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6201                 struct ethtool_link_ksettings *cmd)
6202 {
6203         struct qeth_card *card = netdev->ml_priv;
6204         enum qeth_link_types link_type;
6205         struct carrier_info carrier_info;
6206         int rc;
6207
6208         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6209                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6210         else
6211                 link_type = card->info.link_type;
6212
6213         cmd->base.duplex = DUPLEX_FULL;
6214         cmd->base.autoneg = AUTONEG_ENABLE;
6215         cmd->base.phy_address = 0;
6216         cmd->base.mdio_support = 0;
6217         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6218         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6219
6220         switch (link_type) {
6221         case QETH_LINK_TYPE_FAST_ETH:
6222         case QETH_LINK_TYPE_LANE_ETH100:
6223                 cmd->base.speed = SPEED_100;
6224                 cmd->base.port = PORT_TP;
6225                 break;
6226         case QETH_LINK_TYPE_GBIT_ETH:
6227         case QETH_LINK_TYPE_LANE_ETH1000:
6228                 cmd->base.speed = SPEED_1000;
6229                 cmd->base.port = PORT_FIBRE;
6230                 break;
6231         case QETH_LINK_TYPE_10GBIT_ETH:
6232                 cmd->base.speed = SPEED_10000;
6233                 cmd->base.port = PORT_FIBRE;
6234                 break;
6235         default:
6236                 cmd->base.speed = SPEED_10;
6237                 cmd->base.port = PORT_TP;
6238         }
6239         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6240
6241         /* Check if we can obtain more accurate information.     */
6242         /* If QUERY_CARD_INFO command is not supported or fails, */
6243         /* just return the heuristics that was filled above.     */
6244         if (!qeth_card_hw_is_reachable(card))
6245                 return -ENODEV;
6246         rc = qeth_query_card_info(card, &carrier_info);
6247         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6248                 return 0;
6249         if (rc) /* report error from the hardware operation */
6250                 return rc;
6251         /* on success, fill in the information got from the hardware */
6252
6253         netdev_dbg(netdev,
6254         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6255                         carrier_info.card_type,
6256                         carrier_info.port_mode,
6257                         carrier_info.port_speed);
6258
6259         /* Update attributes for which we've obtained more authoritative */
6260         /* information, leave the rest the way they where filled above.  */
6261         switch (carrier_info.card_type) {
6262         case CARD_INFO_TYPE_1G_COPPER_A:
6263         case CARD_INFO_TYPE_1G_COPPER_B:
6264                 cmd->base.port = PORT_TP;
6265                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6266                 break;
6267         case CARD_INFO_TYPE_1G_FIBRE_A:
6268         case CARD_INFO_TYPE_1G_FIBRE_B:
6269                 cmd->base.port = PORT_FIBRE;
6270                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6271                 break;
6272         case CARD_INFO_TYPE_10G_FIBRE_A:
6273         case CARD_INFO_TYPE_10G_FIBRE_B:
6274                 cmd->base.port = PORT_FIBRE;
6275                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6276                 break;
6277         }
6278
6279         switch (carrier_info.port_mode) {
6280         case CARD_INFO_PORTM_FULLDUPLEX:
6281                 cmd->base.duplex = DUPLEX_FULL;
6282                 break;
6283         case CARD_INFO_PORTM_HALFDUPLEX:
6284                 cmd->base.duplex = DUPLEX_HALF;
6285                 break;
6286         }
6287
6288         switch (carrier_info.port_speed) {
6289         case CARD_INFO_PORTS_10M:
6290                 cmd->base.speed = SPEED_10;
6291                 break;
6292         case CARD_INFO_PORTS_100M:
6293                 cmd->base.speed = SPEED_100;
6294                 break;
6295         case CARD_INFO_PORTS_1G:
6296                 cmd->base.speed = SPEED_1000;
6297                 break;
6298         case CARD_INFO_PORTS_10G:
6299                 cmd->base.speed = SPEED_10000;
6300                 break;
6301         }
6302
6303         return 0;
6304 }
6305 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6306
6307 /* Callback to handle checksum offload command reply from OSA card.
6308  * Verify that required features have been enabled on the card.
6309  * Return error in hdr->return_code as this value is checked by caller.
6310  *
6311  * Always returns zero to indicate no further messages from the OSA card.
6312  */
6313 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6314                                         struct qeth_reply *reply,
6315                                         unsigned long data)
6316 {
6317         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6318         struct qeth_checksum_cmd *chksum_cb =
6319                                 (struct qeth_checksum_cmd *)reply->param;
6320
6321         QETH_CARD_TEXT(card, 4, "chkdoccb");
6322         if (qeth_setassparms_inspect_rc(cmd))
6323                 return 0;
6324
6325         memset(chksum_cb, 0, sizeof(*chksum_cb));
6326         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6327                 chksum_cb->supported =
6328                                 cmd->data.setassparms.data.chksum.supported;
6329                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6330         }
6331         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6332                 chksum_cb->supported =
6333                                 cmd->data.setassparms.data.chksum.supported;
6334                 chksum_cb->enabled =
6335                                 cmd->data.setassparms.data.chksum.enabled;
6336                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6337                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6338         }
6339         return 0;
6340 }
6341
6342 /* Send command to OSA card and check results. */
6343 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6344                                      enum qeth_ipa_funcs ipa_func,
6345                                      __u16 cmd_code, long data,
6346                                      struct qeth_checksum_cmd *chksum_cb,
6347                                      enum qeth_prot_versions prot)
6348 {
6349         struct qeth_cmd_buffer *iob;
6350         int rc = -ENOMEM;
6351
6352         QETH_CARD_TEXT(card, 4, "chkdocmd");
6353         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6354                                        sizeof(__u32), prot);
6355         if (iob)
6356                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6357                                            qeth_ipa_checksum_run_cmd_cb,
6358                                            chksum_cb);
6359         return rc;
6360 }
6361
6362 static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
6363                                  enum qeth_prot_versions prot)
6364 {
6365         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6366         struct qeth_checksum_cmd chksum_cb;
6367         int rc;
6368
6369         if (prot == QETH_PROT_IPV4)
6370                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6371         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6372                                        &chksum_cb, prot);
6373         if (!rc) {
6374                 if ((required_features & chksum_cb.supported) !=
6375                     required_features)
6376                         rc = -EIO;
6377                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6378                          cstype == IPA_INBOUND_CHECKSUM)
6379                         dev_warn(&card->gdev->dev,
6380                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6381                                  QETH_CARD_IFNAME(card));
6382         }
6383         if (rc) {
6384                 qeth_send_simple_setassparms_prot(card, cstype,
6385                                                   IPA_CMD_ASS_STOP, 0, prot);
6386                 dev_warn(&card->gdev->dev,
6387                          "Starting HW IPv%d checksumming for %s failed, using SW checksumming\n",
6388                          prot, QETH_CARD_IFNAME(card));
6389                 return rc;
6390         }
6391         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6392                                        chksum_cb.supported, &chksum_cb,
6393                                        prot);
6394         if (!rc) {
6395                 if ((required_features & chksum_cb.enabled) !=
6396                     required_features)
6397                         rc = -EIO;
6398         }
6399         if (rc) {
6400                 qeth_send_simple_setassparms_prot(card, cstype,
6401                                                   IPA_CMD_ASS_STOP, 0, prot);
6402                 dev_warn(&card->gdev->dev,
6403                          "Enabling HW IPv%d checksumming for %s failed, using SW checksumming\n",
6404                          prot, QETH_CARD_IFNAME(card));
6405                 return rc;
6406         }
6407
6408         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6409                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6410         return 0;
6411 }
6412
6413 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6414                              enum qeth_prot_versions prot)
6415 {
6416         int rc = (on) ? qeth_send_checksum_on(card, cstype, prot)
6417                       : qeth_send_simple_setassparms_prot(card, cstype,
6418                                                           IPA_CMD_ASS_STOP, 0,
6419                                                           prot);
6420         return rc ? -EIO : 0;
6421 }
6422
6423 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6424 {
6425         int rc;
6426
6427         QETH_CARD_TEXT(card, 3, "sttso");
6428
6429         if (on) {
6430                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6431                                                   IPA_CMD_ASS_START, 0);
6432                 if (rc) {
6433                         dev_warn(&card->gdev->dev,
6434                                  "Starting outbound TCP segmentation offload for %s failed\n",
6435                                  QETH_CARD_IFNAME(card));
6436                         return -EIO;
6437                 }
6438                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6439         } else {
6440                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6441                                                   IPA_CMD_ASS_STOP, 0);
6442         }
6443         return rc;
6444 }
6445
6446 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6447 {
6448         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6449         int rc_ipv6;
6450
6451         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6452                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6453                                             QETH_PROT_IPV4);
6454         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6455                 /* no/one Offload Assist available, so the rc is trivial */
6456                 return rc_ipv4;
6457
6458         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6459                                     QETH_PROT_IPV6);
6460
6461         if (on)
6462                 /* enable: success if any Assist is active */
6463                 return (rc_ipv6) ? rc_ipv4 : 0;
6464
6465         /* disable: failure if any Assist is still active */
6466         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6467 }
6468
6469 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
6470                           NETIF_F_IPV6_CSUM)
6471 /**
6472  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6473  * @dev:        a net_device
6474  */
6475 void qeth_enable_hw_features(struct net_device *dev)
6476 {
6477         struct qeth_card *card = dev->ml_priv;
6478         netdev_features_t features;
6479
6480         rtnl_lock();
6481         features = dev->features;
6482         /* force-off any feature that needs an IPA sequence.
6483          * netdev_update_features() will restart them.
6484          */
6485         dev->features &= ~QETH_HW_FEATURES;
6486         netdev_update_features(dev);
6487         if (features != dev->features)
6488                 dev_warn(&card->gdev->dev,
6489                          "Device recovery failed to restore all offload features\n");
6490         rtnl_unlock();
6491 }
6492 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6493
6494 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6495 {
6496         struct qeth_card *card = dev->ml_priv;
6497         netdev_features_t changed = dev->features ^ features;
6498         int rc = 0;
6499
6500         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6501         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6502
6503         if ((changed & NETIF_F_IP_CSUM)) {
6504                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6505                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6506                 if (rc)
6507                         changed ^= NETIF_F_IP_CSUM;
6508         }
6509         if (changed & NETIF_F_IPV6_CSUM) {
6510                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6511                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6512                 if (rc)
6513                         changed ^= NETIF_F_IPV6_CSUM;
6514         }
6515         if (changed & NETIF_F_RXCSUM) {
6516                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6517                 if (rc)
6518                         changed ^= NETIF_F_RXCSUM;
6519         }
6520         if ((changed & NETIF_F_TSO)) {
6521                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6522                 if (rc)
6523                         changed ^= NETIF_F_TSO;
6524         }
6525
6526         /* everything changed successfully? */
6527         if ((dev->features ^ features) == changed)
6528                 return 0;
6529         /* something went wrong. save changed features and return error */
6530         dev->features ^= changed;
6531         return -EIO;
6532 }
6533 EXPORT_SYMBOL_GPL(qeth_set_features);
6534
6535 netdev_features_t qeth_fix_features(struct net_device *dev,
6536                                     netdev_features_t features)
6537 {
6538         struct qeth_card *card = dev->ml_priv;
6539
6540         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6541         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6542                 features &= ~NETIF_F_IP_CSUM;
6543         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6544                 features &= ~NETIF_F_IPV6_CSUM;
6545         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6546             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6547                 features &= ~NETIF_F_RXCSUM;
6548         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6549                 features &= ~NETIF_F_TSO;
6550         /* if the card isn't up, remove features that require hw changes */
6551         if (card->state == CARD_STATE_DOWN ||
6552             card->state == CARD_STATE_RECOVER)
6553                 features &= ~QETH_HW_FEATURES;
6554         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6555         return features;
6556 }
6557 EXPORT_SYMBOL_GPL(qeth_fix_features);
6558
6559 netdev_features_t qeth_features_check(struct sk_buff *skb,
6560                                       struct net_device *dev,
6561                                       netdev_features_t features)
6562 {
6563         /* GSO segmentation builds skbs with
6564          *      a (small) linear part for the headers, and
6565          *      page frags for the data.
6566          * Compared to a linear skb, the header-only part consumes an
6567          * additional buffer element. This reduces buffer utilization, and
6568          * hurts throughput. So compress small segments into one element.
6569          */
6570         if (netif_needs_gso(skb, features)) {
6571                 /* match skb_segment(): */
6572                 unsigned int doffset = skb->data - skb_mac_header(skb);
6573                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6574                 unsigned int hroom = skb_headroom(skb);
6575
6576                 /* linearize only if resulting skb allocations are order-0: */
6577                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6578                         features &= ~NETIF_F_SG;
6579         }
6580
6581         return vlan_features_check(skb, features);
6582 }
6583 EXPORT_SYMBOL_GPL(qeth_features_check);
6584
6585 static int __init qeth_core_init(void)
6586 {
6587         int rc;
6588
6589         pr_info("loading core functions\n");
6590         INIT_LIST_HEAD(&qeth_core_card_list.list);
6591         INIT_LIST_HEAD(&qeth_dbf_list);
6592         rwlock_init(&qeth_core_card_list.rwlock);
6593         mutex_init(&qeth_mod_mutex);
6594
6595         qeth_wq = create_singlethread_workqueue("qeth_wq");
6596         if (!qeth_wq) {
6597                 rc = -ENOMEM;
6598                 goto out_err;
6599         }
6600
6601         rc = qeth_register_dbf_views();
6602         if (rc)
6603                 goto dbf_err;
6604         qeth_core_root_dev = root_device_register("qeth");
6605         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6606         if (rc)
6607                 goto register_err;
6608         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6609                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6610         if (!qeth_core_header_cache) {
6611                 rc = -ENOMEM;
6612                 goto slab_err;
6613         }
6614         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6615                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6616         if (!qeth_qdio_outbuf_cache) {
6617                 rc = -ENOMEM;
6618                 goto cqslab_err;
6619         }
6620         rc = ccw_driver_register(&qeth_ccw_driver);
6621         if (rc)
6622                 goto ccw_err;
6623         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6624         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6625         if (rc)
6626                 goto ccwgroup_err;
6627
6628         return 0;
6629
6630 ccwgroup_err:
6631         ccw_driver_unregister(&qeth_ccw_driver);
6632 ccw_err:
6633         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6634 cqslab_err:
6635         kmem_cache_destroy(qeth_core_header_cache);
6636 slab_err:
6637         root_device_unregister(qeth_core_root_dev);
6638 register_err:
6639         qeth_unregister_dbf_views();
6640 dbf_err:
6641         destroy_workqueue(qeth_wq);
6642 out_err:
6643         pr_err("Initializing the qeth device driver failed\n");
6644         return rc;
6645 }
6646
6647 static void __exit qeth_core_exit(void)
6648 {
6649         qeth_clear_dbf_list();
6650         destroy_workqueue(qeth_wq);
6651         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6652         ccw_driver_unregister(&qeth_ccw_driver);
6653         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6654         kmem_cache_destroy(qeth_core_header_cache);
6655         root_device_unregister(qeth_core_root_dev);
6656         qeth_unregister_dbf_views();
6657         pr_info("core functions removed\n");
6658 }
6659
6660 module_init(qeth_core_init);
6661 module_exit(qeth_core_exit);
6662 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6663 MODULE_DESCRIPTION("qeth core functions");
6664 MODULE_LICENSE("GPL");