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_free_buffer_pool(struct qeth_card *);
  69 static int qeth_qdio_establish(struct qeth_card *);
  70 static void qeth_free_qdio_buffers(struct qeth_card *);
  71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  72                 struct qeth_qdio_out_buffer *buf,
  73                 enum iucv_tx_notify notification);
  74 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  75 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  76
  77 struct workqueue_struct *qeth_wq;
  78 EXPORT_SYMBOL_GPL(qeth_wq);
  79
  80 int qeth_card_hw_is_reachable(struct qeth_card *card)
  81 {
  82         return (card->state == CARD_STATE_SOFTSETUP) ||
  83                 (card->state == CARD_STATE_UP);
  84 }
  85 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  86
  87 static void qeth_close_dev_handler(struct work_struct *work)
  88 {
  89         struct qeth_card *card;
  90
  91         card = container_of(work, struct qeth_card, close_dev_work);
  92         QETH_CARD_TEXT(card, 2, "cldevhdl");
  93         rtnl_lock();
  94         dev_close(card->dev);
  95         rtnl_unlock();
  96         ccwgroup_set_offline(card->gdev);
  97 }
  98
  99 void qeth_close_dev(struct qeth_card *card)
 100 {
 101         QETH_CARD_TEXT(card, 2, "cldevsubm");
 102         queue_work(qeth_wq, &card->close_dev_work);
 103 }
 104 EXPORT_SYMBOL_GPL(qeth_close_dev);
 105
 106 static const char *qeth_get_cardname(struct qeth_card *card)
 107 {
 108         if (card->info.guestlan) {
 109                 switch (card->info.type) {
 110                 case QETH_CARD_TYPE_OSD:
 111                         return " Virtual NIC QDIO";
 112                 case QETH_CARD_TYPE_IQD:
 113                         return " Virtual NIC Hiper";
 114                 case QETH_CARD_TYPE_OSM:
 115                         return " Virtual NIC QDIO - OSM";
 116                 case QETH_CARD_TYPE_OSX:
 117                         return " Virtual NIC QDIO - OSX";
 118                 default:
 119                         return " unknown";
 120                 }
 121         } else {
 122                 switch (card->info.type) {
 123                 case QETH_CARD_TYPE_OSD:
 124                         return " OSD Express";
 125                 case QETH_CARD_TYPE_IQD:
 126                         return " HiperSockets";
 127                 case QETH_CARD_TYPE_OSN:
 128                         return " OSN QDIO";
 129                 case QETH_CARD_TYPE_OSM:
 130                         return " OSM QDIO";
 131                 case QETH_CARD_TYPE_OSX:
 132                         return " OSX QDIO";
 133                 default:
 134                         return " unknown";
 135                 }
 136         }
 137         return " n/a";
 138 }
 139
 140 /* max length to be returned: 14 */
 141 const char *qeth_get_cardname_short(struct qeth_card *card)
 142 {
 143         if (card->info.guestlan) {
 144                 switch (card->info.type) {
 145                 case QETH_CARD_TYPE_OSD:
 146                         return "Virt.NIC QDIO";
 147                 case QETH_CARD_TYPE_IQD:
 148                         return "Virt.NIC Hiper";
 149                 case QETH_CARD_TYPE_OSM:
 150                         return "Virt.NIC OSM";
 151                 case QETH_CARD_TYPE_OSX:
 152                         return "Virt.NIC OSX";
 153                 default:
 154                         return "unknown";
 155                 }
 156         } else {
 157                 switch (card->info.type) {
 158                 case QETH_CARD_TYPE_OSD:
 159                         switch (card->info.link_type) {
 160                         case QETH_LINK_TYPE_FAST_ETH:
 161                                 return "OSD_100";
 162                         case QETH_LINK_TYPE_HSTR:
 163                                 return "HSTR";
 164                         case QETH_LINK_TYPE_GBIT_ETH:
 165                                 return "OSD_1000";
 166                         case QETH_LINK_TYPE_10GBIT_ETH:
 167                                 return "OSD_10GIG";
 168                         case QETH_LINK_TYPE_LANE_ETH100:
 169                                 return "OSD_FE_LANE";
 170                         case QETH_LINK_TYPE_LANE_TR:
 171                                 return "OSD_TR_LANE";
 172                         case QETH_LINK_TYPE_LANE_ETH1000:
 173                                 return "OSD_GbE_LANE";
 174                         case QETH_LINK_TYPE_LANE:
 175                                 return "OSD_ATM_LANE";
 176                         default:
 177                                 return "OSD_Express";
 178                         }
 179                 case QETH_CARD_TYPE_IQD:
 180                         return "HiperSockets";
 181                 case QETH_CARD_TYPE_OSN:
 182                         return "OSN";
 183                 case QETH_CARD_TYPE_OSM:
 184                         return "OSM_1000";
 185                 case QETH_CARD_TYPE_OSX:
 186                         return "OSX_10GIG";
 187                 default:
 188                         return "unknown";
 189                 }
 190         }
 191         return "n/a";
 192 }
 193
 194 void qeth_set_recovery_task(struct qeth_card *card)
 195 {
 196         card->recovery_task = current;
 197 }
 198 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 199
 200 void qeth_clear_recovery_task(struct qeth_card *card)
 201 {
 202         card->recovery_task = NULL;
 203 }
 204 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 205
 206 static bool qeth_is_recovery_task(const struct qeth_card *card)
 207 {
 208         return card->recovery_task == current;
 209 }
 210
 211 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 212                          int clear_start_mask)
 213 {
 214         unsigned long flags;
 215
 216         spin_lock_irqsave(&card->thread_mask_lock, flags);
 217         card->thread_allowed_mask = threads;
 218         if (clear_start_mask)
 219                 card->thread_start_mask &= threads;
 220         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 221         wake_up(&card->wait_q);
 222 }
 223 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 224
 225 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 226 {
 227         unsigned long flags;
 228         int rc = 0;
 229
 230         spin_lock_irqsave(&card->thread_mask_lock, flags);
 231         rc = (card->thread_running_mask & threads);
 232         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 233         return rc;
 234 }
 235 EXPORT_SYMBOL_GPL(qeth_threads_running);
 236
 237 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 238 {
 239         if (qeth_is_recovery_task(card))
 240                 return 0;
 241         return wait_event_interruptible(card->wait_q,
 242                         qeth_threads_running(card, threads) == 0);
 243 }
 244 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 245
 246 void qeth_clear_working_pool_list(struct qeth_card *card)
 247 {
 248         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 249
 250         QETH_CARD_TEXT(card, 5, "clwrklst");
 251         list_for_each_entry_safe(pool_entry, tmp,
 252                             &card->qdio.in_buf_pool.entry_list, list){
 253                         list_del(&pool_entry->list);
 254         }
 255 }
 256 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 257
 258 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 259 {
 260         struct qeth_buffer_pool_entry *pool_entry;
 261         void *ptr;
 262         int i, j;
 263
 264         QETH_CARD_TEXT(card, 5, "alocpool");
 265         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 266                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 267                 if (!pool_entry) {
 268                         qeth_free_buffer_pool(card);
 269                         return -ENOMEM;
 270                 }
 271                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 272                         ptr = (void *) __get_free_page(GFP_KERNEL);
 273                         if (!ptr) {
 274                                 while (j > 0)
 275                                         free_page((unsigned long)
 276                                                   pool_entry->elements[--j]);
 277                                 kfree(pool_entry);
 278                                 qeth_free_buffer_pool(card);
 279                                 return -ENOMEM;
 280                         }
 281                         pool_entry->elements[j] = ptr;
 282                 }
 283                 list_add(&pool_entry->init_list,
 284                          &card->qdio.init_pool.entry_list);
 285         }
 286         return 0;
 287 }
 288
 289 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 290 {
 291         QETH_CARD_TEXT(card, 2, "realcbp");
 292
 293         if ((card->state != CARD_STATE_DOWN) &&
 294             (card->state != CARD_STATE_RECOVER))
 295                 return -EPERM;
 296
 297         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 298         qeth_clear_working_pool_list(card);
 299         qeth_free_buffer_pool(card);
 300         card->qdio.in_buf_pool.buf_count = bufcnt;
 301         card->qdio.init_pool.buf_count = bufcnt;
 302         return qeth_alloc_buffer_pool(card);
 303 }
 304 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 305
 306 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 307 {
 308         if (!q)
 309                 return;
 310
 311         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 312         kfree(q);
 313 }
 314
 315 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 316 {
 317         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 318         int i;
 319
 320         if (!q)
 321                 return NULL;
 322
 323         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 324                 kfree(q);
 325                 return NULL;
 326         }
 327
 328         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 329                 q->bufs[i].buffer = q->qdio_bufs[i];
 330
 331         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 332         return q;
 333 }
 334
 335 static int qeth_cq_init(struct qeth_card *card)
 336 {
 337         int rc;
 338
 339         if (card->options.cq == QETH_CQ_ENABLED) {
 340                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 341                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 342                                    QDIO_MAX_BUFFERS_PER_Q);
 343                 card->qdio.c_q->next_buf_to_init = 127;
 344                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 345                              card->qdio.no_in_queues - 1, 0,
 346                              127);
 347                 if (rc) {
 348                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 349                         goto out;
 350                 }
 351         }
 352         rc = 0;
 353 out:
 354         return rc;
 355 }
 356
 357 static int qeth_alloc_cq(struct qeth_card *card)
 358 {
 359         int rc;
 360
 361         if (card->options.cq == QETH_CQ_ENABLED) {
 362                 int i;
 363                 struct qdio_outbuf_state *outbuf_states;
 364
 365                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 366                 card->qdio.c_q = qeth_alloc_qdio_queue();
 367                 if (!card->qdio.c_q) {
 368                         rc = -1;
 369                         goto kmsg_out;
 370                 }
 371                 card->qdio.no_in_queues = 2;
 372                 card->qdio.out_bufstates =
 373                         kcalloc(card->qdio.no_out_queues *
 374                                         QDIO_MAX_BUFFERS_PER_Q,
 375                                 sizeof(struct qdio_outbuf_state),
 376                                 GFP_KERNEL);
 377                 outbuf_states = card->qdio.out_bufstates;
 378                 if (outbuf_states == NULL) {
 379                         rc = -1;
 380                         goto free_cq_out;
 381                 }
 382                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 383                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 384                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 385                 }
 386         } else {
 387                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 388                 card->qdio.c_q = NULL;
 389                 card->qdio.no_in_queues = 1;
 390         }
 391         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 392         rc = 0;
 393 out:
 394         return rc;
 395 free_cq_out:
 396         qeth_free_qdio_queue(card->qdio.c_q);
 397         card->qdio.c_q = NULL;
 398 kmsg_out:
 399         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 400         goto out;
 401 }
 402
 403 static void qeth_free_cq(struct qeth_card *card)
 404 {
 405         if (card->qdio.c_q) {
 406                 --card->qdio.no_in_queues;
 407                 qeth_free_qdio_queue(card->qdio.c_q);
 408                 card->qdio.c_q = NULL;
 409         }
 410         kfree(card->qdio.out_bufstates);
 411         card->qdio.out_bufstates = NULL;
 412 }
 413
 414 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 415                                                         int delayed)
 416 {
 417         enum iucv_tx_notify n;
 418
 419         switch (sbalf15) {
 420         case 0:
 421                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 422                 break;
 423         case 4:
 424         case 16:
 425         case 17:
 426         case 18:
 427                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 428                         TX_NOTIFY_UNREACHABLE;
 429                 break;
 430         default:
 431                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 432                         TX_NOTIFY_GENERALERROR;
 433                 break;
 434         }
 435
 436         return n;
 437 }
 438
 439 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 440                                          int forced_cleanup)
 441 {
 442         if (q->card->options.cq != QETH_CQ_ENABLED)
 443                 return;
 444
 445         if (q->bufs[bidx]->next_pending != NULL) {
 446                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 447                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 448
 449                 while (c) {
 450                         if (forced_cleanup ||
 451                             atomic_read(&c->state) ==
 452                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 453                                 struct qeth_qdio_out_buffer *f = c;
 454                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 455                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 456                                 /* release here to avoid interleaving between
 457                                    outbound tasklet and inbound tasklet
 458                                    regarding notifications and lifecycle */
 459                                 qeth_release_skbs(c);
 460
 461                                 c = f->next_pending;
 462                                 WARN_ON_ONCE(head->next_pending != f);
 463                                 head->next_pending = c;
 464                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 465                         } else {
 466                                 head = c;
 467                                 c = c->next_pending;
 468                         }
 469
 470                 }
 471         }
 472         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 473                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 474                 /* for recovery situations */
 475                 qeth_init_qdio_out_buf(q, bidx);
 476                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 477         }
 478 }
 479
 480
 481 static void qeth_qdio_handle_aob(struct qeth_card *card,
 482                                  unsigned long phys_aob_addr)
 483 {
 484         struct qaob *aob;
 485         struct qeth_qdio_out_buffer *buffer;
 486         enum iucv_tx_notify notification;
 487         unsigned int i;
 488
 489         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 490         QETH_CARD_TEXT(card, 5, "haob");
 491         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 492         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 493         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 494
 495         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 496                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 497                 notification = TX_NOTIFY_OK;
 498         } else {
 499                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 500                                                         QETH_QDIO_BUF_PENDING);
 501                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 502                 notification = TX_NOTIFY_DELAYED_OK;
 503         }
 504
 505         if (aob->aorc != 0)  {
 506                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 507                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 508         }
 509         qeth_notify_skbs(buffer->q, buffer, notification);
 510
 511         /* Free dangling allocations. The attached skbs are handled by
 512          * qeth_cleanup_handled_pending().
 513          */
 514         for (i = 0;
 515              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 516              i++) {
 517                 if (aob->sba[i] && buffer->is_header[i])
 518                         kmem_cache_free(qeth_core_header_cache,
 519                                         (void *) aob->sba[i]);
 520         }
 521         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 522
 523         qdio_release_aob(aob);
 524 }
 525
 526 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 527 {
 528         return card->options.cq == QETH_CQ_ENABLED &&
 529             card->qdio.c_q != NULL &&
 530             queue != 0 &&
 531             queue == card->qdio.no_in_queues - 1;
 532 }
 533
 534 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
 535 {
 536         ccw->cmd_code = cmd_code;
 537         ccw->flags = CCW_FLAG_SLI;
 538         ccw->count = len;
 539         ccw->cda = (__u32) __pa(data);
 540 }
 541
 542 static int __qeth_issue_next_read(struct qeth_card *card)
 543 {
 544         struct qeth_channel *channel = &card->read;
 545         struct qeth_cmd_buffer *iob;
 546         int rc;
 547
 548         QETH_CARD_TEXT(card, 5, "issnxrd");
 549         if (channel->state != CH_STATE_UP)
 550                 return -EIO;
 551         iob = qeth_get_buffer(channel);
 552         if (!iob) {
 553                 dev_warn(&card->gdev->dev, "The qeth device driver "
 554                         "failed to recover an error on the device\n");
 555                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 556                         "available\n", dev_name(&card->gdev->dev));
 557                 return -ENOMEM;
 558         }
 559         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 560         QETH_CARD_TEXT(card, 6, "noirqpnd");
 561         rc = ccw_device_start(channel->ccwdev, channel->ccw,
 562                               (addr_t) iob, 0, 0);
 563         if (rc) {
 564                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 565                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 566                 atomic_set(&channel->irq_pending, 0);
 567                 card->read_or_write_problem = 1;
 568                 qeth_schedule_recovery(card);
 569                 wake_up(&card->wait_q);
 570         }
 571         return rc;
 572 }
 573
 574 static int qeth_issue_next_read(struct qeth_card *card)
 575 {
 576         int ret;
 577
 578         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 579         ret = __qeth_issue_next_read(card);
 580         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 581
 582         return ret;
 583 }
 584
 585 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 586 {
 587         struct qeth_reply *reply;
 588
 589         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 590         if (reply) {
 591                 refcount_set(&reply->refcnt, 1);
 592                 atomic_set(&reply->received, 0);
 593                 reply->card = card;
 594         }
 595         return reply;
 596 }
 597
 598 static void qeth_get_reply(struct qeth_reply *reply)
 599 {
 600         refcount_inc(&reply->refcnt);
 601 }
 602
 603 static void qeth_put_reply(struct qeth_reply *reply)
 604 {
 605         if (refcount_dec_and_test(&reply->refcnt))
 606                 kfree(reply);
 607 }
 608
 609 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 610                 struct qeth_card *card)
 611 {
 612         char *ipa_name;
 613         int com = cmd->hdr.command;
 614         ipa_name = qeth_get_ipa_cmd_name(com);
 615         if (rc)
 616                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 617                                 "x%X \"%s\"\n",
 618                                 ipa_name, com, dev_name(&card->gdev->dev),
 619                                 QETH_CARD_IFNAME(card), rc,
 620                                 qeth_get_ipa_msg(rc));
 621         else
 622                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 623                                 ipa_name, com, dev_name(&card->gdev->dev),
 624                                 QETH_CARD_IFNAME(card));
 625 }
 626
 627 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 628                 struct qeth_cmd_buffer *iob)
 629 {
 630         struct qeth_ipa_cmd *cmd = NULL;
 631
 632         QETH_CARD_TEXT(card, 5, "chkipad");
 633         if (IS_IPA(iob->data)) {
 634                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 635                 if (IS_IPA_REPLY(cmd)) {
 636                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 637                             cmd->hdr.command != IPA_CMD_DELCCID &&
 638                             cmd->hdr.command != IPA_CMD_MODCCID &&
 639                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 640                                 qeth_issue_ipa_msg(cmd,
 641                                                 cmd->hdr.return_code, card);
 642                         return cmd;
 643                 } else {
 644                         switch (cmd->hdr.command) {
 645                         case IPA_CMD_STOPLAN:
 646                                 if (cmd->hdr.return_code ==
 647                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 648                                         dev_err(&card->gdev->dev,
 649                                            "Interface %s is down because the "
 650                                            "adjacent port is no longer in "
 651                                            "reflective relay mode\n",
 652                                            QETH_CARD_IFNAME(card));
 653                                         qeth_close_dev(card);
 654                                 } else {
 655                                         dev_warn(&card->gdev->dev,
 656                                            "The link for interface %s on CHPID"
 657                                            " 0x%X failed\n",
 658                                            QETH_CARD_IFNAME(card),
 659                                            card->info.chpid);
 660                                         qeth_issue_ipa_msg(cmd,
 661                                                 cmd->hdr.return_code, card);
 662                                 }
 663                                 card->lan_online = 0;
 664                                 netif_carrier_off(card->dev);
 665                                 return NULL;
 666                         case IPA_CMD_STARTLAN:
 667                                 dev_info(&card->gdev->dev,
 668                                            "The link for %s on CHPID 0x%X has"
 669                                            " been restored\n",
 670                                            QETH_CARD_IFNAME(card),
 671                                            card->info.chpid);
 672                                 netif_carrier_on(card->dev);
 673                                 card->lan_online = 1;
 674                                 if (card->info.hwtrap)
 675                                         card->info.hwtrap = 2;
 676                                 qeth_schedule_recovery(card);
 677                                 return NULL;
 678                         case IPA_CMD_SETBRIDGEPORT_IQD:
 679                         case IPA_CMD_SETBRIDGEPORT_OSA:
 680                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 681                                 if (card->discipline->control_event_handler
 682                                                                 (card, cmd))
 683                                         return cmd;
 684                                 else
 685                                         return NULL;
 686                         case IPA_CMD_MODCCID:
 687                                 return cmd;
 688                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 689                                 QETH_CARD_TEXT(card, 3, "irla");
 690                                 break;
 691                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 692                                 QETH_CARD_TEXT(card, 3, "urla");
 693                                 break;
 694                         default:
 695                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 696                                            "but not a reply!\n");
 697                                 break;
 698                         }
 699                 }
 700         }
 701         return cmd;
 702 }
 703
 704 void qeth_clear_ipacmd_list(struct qeth_card *card)
 705 {
 706         struct qeth_reply *reply, *r;
 707         unsigned long flags;
 708
 709         QETH_CARD_TEXT(card, 4, "clipalst");
 710
 711         spin_lock_irqsave(&card->lock, flags);
 712         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 713                 qeth_get_reply(reply);
 714                 reply->rc = -EIO;
 715                 atomic_inc(&reply->received);
 716                 list_del_init(&reply->list);
 717                 wake_up(&reply->wait_q);
 718                 qeth_put_reply(reply);
 719         }
 720         spin_unlock_irqrestore(&card->lock, flags);
 721 }
 722 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 723
 724 static int qeth_check_idx_response(struct qeth_card *card,
 725         unsigned char *buffer)
 726 {
 727         if (!buffer)
 728                 return 0;
 729
 730         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 731         if ((buffer[2] & 0xc0) == 0xc0) {
 732                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#02x\n",
 733                                  buffer[4]);
 734                 QETH_CARD_TEXT(card, 2, "ckidxres");
 735                 QETH_CARD_TEXT(card, 2, " idxterm");
 736                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 737                 if (buffer[4] == 0xf6) {
 738                         dev_err(&card->gdev->dev,
 739                         "The qeth device is not configured "
 740                         "for the OSI layer required by z/VM\n");
 741                         return -EPERM;
 742                 }
 743                 return -EIO;
 744         }
 745         return 0;
 746 }
 747
 748 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 749 {
 750         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 751                 dev_get_drvdata(&cdev->dev))->dev);
 752         return card;
 753 }
 754
 755 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 756 {
 757         __u8 index;
 758
 759         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 760         index = channel->io_buf_no;
 761         do {
 762                 if (channel->iob[index].state == BUF_STATE_FREE) {
 763                         channel->iob[index].state = BUF_STATE_LOCKED;
 764                         channel->io_buf_no = (channel->io_buf_no + 1) %
 765                                 QETH_CMD_BUFFER_NO;
 766                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 767                         return channel->iob + index;
 768                 }
 769                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 770         } while (index != channel->io_buf_no);
 771
 772         return NULL;
 773 }
 774
 775 void qeth_release_buffer(struct qeth_channel *channel,
 776                 struct qeth_cmd_buffer *iob)
 777 {
 778         unsigned long flags;
 779
 780         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 781         spin_lock_irqsave(&channel->iob_lock, flags);
 782         memset(iob->data, 0, QETH_BUFSIZE);
 783         iob->state = BUF_STATE_FREE;
 784         iob->callback = qeth_send_control_data_cb;
 785         iob->rc = 0;
 786         spin_unlock_irqrestore(&channel->iob_lock, flags);
 787         wake_up(&channel->wait_q);
 788 }
 789 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 790
 791 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 792 {
 793         struct qeth_cmd_buffer *buffer = NULL;
 794         unsigned long flags;
 795
 796         spin_lock_irqsave(&channel->iob_lock, flags);
 797         buffer = __qeth_get_buffer(channel);
 798         spin_unlock_irqrestore(&channel->iob_lock, flags);
 799         return buffer;
 800 }
 801
 802 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 803 {
 804         struct qeth_cmd_buffer *buffer;
 805         wait_event(channel->wait_q,
 806                    ((buffer = qeth_get_buffer(channel)) != NULL));
 807         return buffer;
 808 }
 809 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 810
 811 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 812 {
 813         int cnt;
 814
 815         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 816                 qeth_release_buffer(channel, &channel->iob[cnt]);
 817         channel->io_buf_no = 0;
 818 }
 819 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 820
 821 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 822                   struct qeth_cmd_buffer *iob)
 823 {
 824         struct qeth_card *card;
 825         struct qeth_reply *reply, *r;
 826         struct qeth_ipa_cmd *cmd;
 827         unsigned long flags;
 828         int keep_reply;
 829         int rc = 0;
 830
 831         card = CARD_FROM_CDEV(channel->ccwdev);
 832         QETH_CARD_TEXT(card, 4, "sndctlcb");
 833         rc = qeth_check_idx_response(card, iob->data);
 834         switch (rc) {
 835         case 0:
 836                 break;
 837         case -EIO:
 838                 qeth_clear_ipacmd_list(card);
 839                 qeth_schedule_recovery(card);
 840                 /* fall through */
 841         default:
 842                 goto out;
 843         }
 844
 845         cmd = qeth_check_ipa_data(card, iob);
 846         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 847                 goto out;
 848         /*in case of OSN : check if cmd is set */
 849         if (card->info.type == QETH_CARD_TYPE_OSN &&
 850             cmd &&
 851             cmd->hdr.command != IPA_CMD_STARTLAN &&
 852             card->osn_info.assist_cb != NULL) {
 853                 card->osn_info.assist_cb(card->dev, cmd);
 854                 goto out;
 855         }
 856
 857         spin_lock_irqsave(&card->lock, flags);
 858         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 859                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 860                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 861                         qeth_get_reply(reply);
 862                         list_del_init(&reply->list);
 863                         spin_unlock_irqrestore(&card->lock, flags);
 864                         keep_reply = 0;
 865                         if (reply->callback != NULL) {
 866                                 if (cmd) {
 867                                         reply->offset = (__u16)((char *)cmd -
 868                                                         (char *)iob->data);
 869                                         keep_reply = reply->callback(card,
 870                                                         reply,
 871                                                         (unsigned long)cmd);
 872                                 } else
 873                                         keep_reply = reply->callback(card,
 874                                                         reply,
 875                                                         (unsigned long)iob);
 876                         }
 877                         if (cmd)
 878                                 reply->rc = (u16) cmd->hdr.return_code;
 879                         else if (iob->rc)
 880                                 reply->rc = iob->rc;
 881                         if (keep_reply) {
 882                                 spin_lock_irqsave(&card->lock, flags);
 883                                 list_add_tail(&reply->list,
 884                                               &card->cmd_waiter_list);
 885                                 spin_unlock_irqrestore(&card->lock, flags);
 886                         } else {
 887                                 atomic_inc(&reply->received);
 888                                 wake_up(&reply->wait_q);
 889                         }
 890                         qeth_put_reply(reply);
 891                         goto out;
 892                 }
 893         }
 894         spin_unlock_irqrestore(&card->lock, flags);
 895 out:
 896         memcpy(&card->seqno.pdu_hdr_ack,
 897                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 898                 QETH_SEQ_NO_LENGTH);
 899         qeth_release_buffer(channel, iob);
 900 }
 901
 902 static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
 903 {
 904         int cnt;
 905
 906         QETH_DBF_TEXT(SETUP, 2, "setupch");
 907
 908         channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
 909         if (!channel->ccw)
 910                 return -ENOMEM;
 911         channel->state = CH_STATE_DOWN;
 912         atomic_set(&channel->irq_pending, 0);
 913         init_waitqueue_head(&channel->wait_q);
 914
 915         if (!alloc_buffers)
 916                 return 0;
 917
 918         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 919                 channel->iob[cnt].data =
 920                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 921                 if (channel->iob[cnt].data == NULL)
 922                         break;
 923                 channel->iob[cnt].state = BUF_STATE_FREE;
 924                 channel->iob[cnt].channel = channel;
 925                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 926                 channel->iob[cnt].rc = 0;
 927         }
 928         if (cnt < QETH_CMD_BUFFER_NO) {
 929                 kfree(channel->ccw);
 930                 while (cnt-- > 0)
 931                         kfree(channel->iob[cnt].data);
 932                 return -ENOMEM;
 933         }
 934         channel->io_buf_no = 0;
 935         spin_lock_init(&channel->iob_lock);
 936
 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 {
1272         int i;
1273
1274         /* is PCI flag set on buffer? */
1275         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1276                 atomic_dec(&queue->set_pci_flags_count);
1277
1278         qeth_release_skbs(buf);
1279
1280         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1281                 if (buf->buffer->element[i].addr && buf->is_header[i])
1282                         kmem_cache_free(qeth_core_header_cache,
1283                                 buf->buffer->element[i].addr);
1284                 buf->is_header[i] = 0;
1285         }
1286
1287         qeth_scrub_qdio_buffer(buf->buffer,
1288                                QETH_MAX_BUFFER_ELEMENTS(queue->card));
1289         buf->next_element_to_fill = 0;
1290         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1291 }
1292
1293 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1294 {
1295         int j;
1296
1297         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1298                 if (!q->bufs[j])
1299                         continue;
1300                 qeth_cleanup_handled_pending(q, j, 1);
1301                 qeth_clear_output_buffer(q, q->bufs[j]);
1302                 if (free) {
1303                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1304                         q->bufs[j] = NULL;
1305                 }
1306         }
1307 }
1308
1309 void qeth_clear_qdio_buffers(struct qeth_card *card)
1310 {
1311         int i;
1312
1313         QETH_CARD_TEXT(card, 2, "clearqdbf");
1314         /* clear outbound buffers to free skbs */
1315         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1316                 if (card->qdio.out_qs[i]) {
1317                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1318                 }
1319         }
1320 }
1321 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1322
1323 static void qeth_free_buffer_pool(struct qeth_card *card)
1324 {
1325         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1326         int i = 0;
1327         list_for_each_entry_safe(pool_entry, tmp,
1328                                  &card->qdio.init_pool.entry_list, init_list){
1329                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1330                         free_page((unsigned long)pool_entry->elements[i]);
1331                 list_del(&pool_entry->init_list);
1332                 kfree(pool_entry);
1333         }
1334 }
1335
1336 static void qeth_clean_channel(struct qeth_channel *channel)
1337 {
1338         int cnt;
1339
1340         QETH_DBF_TEXT(SETUP, 2, "freech");
1341         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1342                 kfree(channel->iob[cnt].data);
1343         kfree(channel->ccw);
1344 }
1345
1346 static void qeth_set_single_write_queues(struct qeth_card *card)
1347 {
1348         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1349             (card->qdio.no_out_queues == 4))
1350                 qeth_free_qdio_buffers(card);
1351
1352         card->qdio.no_out_queues = 1;
1353         if (card->qdio.default_out_queue != 0)
1354                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1355
1356         card->qdio.default_out_queue = 0;
1357 }
1358
1359 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1360 {
1361         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1362             (card->qdio.no_out_queues == 1)) {
1363                 qeth_free_qdio_buffers(card);
1364                 card->qdio.default_out_queue = 2;
1365         }
1366         card->qdio.no_out_queues = 4;
1367 }
1368
1369 static void qeth_update_from_chp_desc(struct qeth_card *card)
1370 {
1371         struct ccw_device *ccwdev;
1372         struct channel_path_desc_fmt0 *chp_dsc;
1373
1374         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1375
1376         ccwdev = card->data.ccwdev;
1377         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1378         if (!chp_dsc)
1379                 goto out;
1380
1381         card->info.func_level = 0x4100 + chp_dsc->desc;
1382         if (card->info.type == QETH_CARD_TYPE_IQD)
1383                 goto out;
1384
1385         /* CHPP field bit 6 == 1 -> single queue */
1386         if ((chp_dsc->chpp & 0x02) == 0x02)
1387                 qeth_set_single_write_queues(card);
1388         else
1389                 qeth_set_multiple_write_queues(card);
1390 out:
1391         kfree(chp_dsc);
1392         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1393         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1394 }
1395
1396 static void qeth_init_qdio_info(struct qeth_card *card)
1397 {
1398         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1399         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1400         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1401         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1402         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1403
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_initial_options(struct qeth_card *card)
1417 {
1418         card->options.route4.type = NO_ROUTER;
1419         card->options.route6.type = NO_ROUTER;
1420         card->options.rx_sg_cb = QETH_RX_SG_CB;
1421         card->options.isolation = ISOLATION_MODE_NONE;
1422         card->options.cq = QETH_CQ_DISABLED;
1423 }
1424
1425 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1426 {
1427         unsigned long flags;
1428         int rc = 0;
1429
1430         spin_lock_irqsave(&card->thread_mask_lock, flags);
1431         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1432                         (u8) card->thread_start_mask,
1433                         (u8) card->thread_allowed_mask,
1434                         (u8) card->thread_running_mask);
1435         rc = (card->thread_start_mask & thread);
1436         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1437         return rc;
1438 }
1439
1440 static void qeth_start_kernel_thread(struct work_struct *work)
1441 {
1442         struct task_struct *ts;
1443         struct qeth_card *card = container_of(work, struct qeth_card,
1444                                         kernel_thread_starter);
1445         QETH_CARD_TEXT(card , 2, "strthrd");
1446
1447         if (card->read.state != CH_STATE_UP &&
1448             card->write.state != CH_STATE_UP)
1449                 return;
1450         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1451                 ts = kthread_run(card->discipline->recover, (void *)card,
1452                                 "qeth_recover");
1453                 if (IS_ERR(ts)) {
1454                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1455                         qeth_clear_thread_running_bit(card,
1456                                 QETH_RECOVER_THREAD);
1457                 }
1458         }
1459 }
1460
1461 static void qeth_buffer_reclaim_work(struct work_struct *);
1462 static void qeth_setup_card(struct qeth_card *card)
1463 {
1464         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1465         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1466
1467         card->info.type = CARD_RDEV(card)->id.driver_info;
1468         card->state = CARD_STATE_DOWN;
1469         spin_lock_init(&card->mclock);
1470         spin_lock_init(&card->lock);
1471         spin_lock_init(&card->ip_lock);
1472         spin_lock_init(&card->thread_mask_lock);
1473         mutex_init(&card->conf_mutex);
1474         mutex_init(&card->discipline_mutex);
1475         mutex_init(&card->vid_list_mutex);
1476         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1477         INIT_LIST_HEAD(&card->cmd_waiter_list);
1478         init_waitqueue_head(&card->wait_q);
1479         qeth_set_initial_options(card);
1480         /* IP address takeover */
1481         INIT_LIST_HEAD(&card->ipato.entries);
1482         qeth_init_qdio_info(card);
1483         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1484         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1485 }
1486
1487 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1488 {
1489         struct qeth_card *card = container_of(slr, struct qeth_card,
1490                                         qeth_service_level);
1491         if (card->info.mcl_level[0])
1492                 seq_printf(m, "qeth: %s firmware level %s\n",
1493                         CARD_BUS_ID(card), card->info.mcl_level);
1494 }
1495
1496 static struct qeth_card *qeth_alloc_card(void)
1497 {
1498         struct qeth_card *card;
1499
1500         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1501         card = kzalloc(sizeof(*card), GFP_KERNEL);
1502         if (!card)
1503                 goto out;
1504         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1505         if (qeth_setup_channel(&card->read, true))
1506                 goto out_ip;
1507         if (qeth_setup_channel(&card->write, true))
1508                 goto out_channel;
1509         if (qeth_setup_channel(&card->data, false))
1510                 goto out_data;
1511         card->options.layer2 = -1;
1512         card->qeth_service_level.seq_print = qeth_core_sl_print;
1513         register_service_level(&card->qeth_service_level);
1514         return card;
1515
1516 out_data:
1517         qeth_clean_channel(&card->write);
1518 out_channel:
1519         qeth_clean_channel(&card->read);
1520 out_ip:
1521         kfree(card);
1522 out:
1523         return NULL;
1524 }
1525
1526 static int qeth_clear_channel(struct qeth_channel *channel)
1527 {
1528         unsigned long flags;
1529         struct qeth_card *card;
1530         int rc;
1531
1532         card = CARD_FROM_CDEV(channel->ccwdev);
1533         QETH_CARD_TEXT(card, 3, "clearch");
1534         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1535         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1536         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1537
1538         if (rc)
1539                 return rc;
1540         rc = wait_event_interruptible_timeout(card->wait_q,
1541                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1542         if (rc == -ERESTARTSYS)
1543                 return rc;
1544         if (channel->state != CH_STATE_STOPPED)
1545                 return -ETIME;
1546         channel->state = CH_STATE_DOWN;
1547         return 0;
1548 }
1549
1550 static int qeth_halt_channel(struct qeth_channel *channel)
1551 {
1552         unsigned long flags;
1553         struct qeth_card *card;
1554         int rc;
1555
1556         card = CARD_FROM_CDEV(channel->ccwdev);
1557         QETH_CARD_TEXT(card, 3, "haltch");
1558         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1559         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1560         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1561
1562         if (rc)
1563                 return rc;
1564         rc = wait_event_interruptible_timeout(card->wait_q,
1565                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1566         if (rc == -ERESTARTSYS)
1567                 return rc;
1568         if (channel->state != CH_STATE_HALTED)
1569                 return -ETIME;
1570         return 0;
1571 }
1572
1573 static int qeth_halt_channels(struct qeth_card *card)
1574 {
1575         int rc1 = 0, rc2 = 0, rc3 = 0;
1576
1577         QETH_CARD_TEXT(card, 3, "haltchs");
1578         rc1 = qeth_halt_channel(&card->read);
1579         rc2 = qeth_halt_channel(&card->write);
1580         rc3 = qeth_halt_channel(&card->data);
1581         if (rc1)
1582                 return rc1;
1583         if (rc2)
1584                 return rc2;
1585         return rc3;
1586 }
1587
1588 static int qeth_clear_channels(struct qeth_card *card)
1589 {
1590         int rc1 = 0, rc2 = 0, rc3 = 0;
1591
1592         QETH_CARD_TEXT(card, 3, "clearchs");
1593         rc1 = qeth_clear_channel(&card->read);
1594         rc2 = qeth_clear_channel(&card->write);
1595         rc3 = qeth_clear_channel(&card->data);
1596         if (rc1)
1597                 return rc1;
1598         if (rc2)
1599                 return rc2;
1600         return rc3;
1601 }
1602
1603 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1604 {
1605         int rc = 0;
1606
1607         QETH_CARD_TEXT(card, 3, "clhacrd");
1608
1609         if (halt)
1610                 rc = qeth_halt_channels(card);
1611         if (rc)
1612                 return rc;
1613         return qeth_clear_channels(card);
1614 }
1615
1616 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1617 {
1618         int rc = 0;
1619
1620         QETH_CARD_TEXT(card, 3, "qdioclr");
1621         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1622                 QETH_QDIO_CLEANING)) {
1623         case QETH_QDIO_ESTABLISHED:
1624                 if (card->info.type == QETH_CARD_TYPE_IQD)
1625                         rc = qdio_shutdown(CARD_DDEV(card),
1626                                 QDIO_FLAG_CLEANUP_USING_HALT);
1627                 else
1628                         rc = qdio_shutdown(CARD_DDEV(card),
1629                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1630                 if (rc)
1631                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1632                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1633                 break;
1634         case QETH_QDIO_CLEANING:
1635                 return rc;
1636         default:
1637                 break;
1638         }
1639         rc = qeth_clear_halt_card(card, use_halt);
1640         if (rc)
1641                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1642         card->state = CARD_STATE_DOWN;
1643         return rc;
1644 }
1645 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1646
1647 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1648                                int *length)
1649 {
1650         struct ciw *ciw;
1651         char *rcd_buf;
1652         int ret;
1653         struct qeth_channel *channel = &card->data;
1654         unsigned long flags;
1655
1656         /*
1657          * scan for RCD command in extended SenseID data
1658          */
1659         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1660         if (!ciw || ciw->cmd == 0)
1661                 return -EOPNOTSUPP;
1662         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1663         if (!rcd_buf)
1664                 return -ENOMEM;
1665
1666         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1667         channel->state = CH_STATE_RCD;
1668         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1669         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1670                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1671                                        QETH_RCD_TIMEOUT);
1672         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1673         if (!ret)
1674                 wait_event(card->wait_q,
1675                            (channel->state == CH_STATE_RCD_DONE ||
1676                             channel->state == CH_STATE_DOWN));
1677         if (channel->state == CH_STATE_DOWN)
1678                 ret = -EIO;
1679         else
1680                 channel->state = CH_STATE_DOWN;
1681         if (ret) {
1682                 kfree(rcd_buf);
1683                 *buffer = NULL;
1684                 *length = 0;
1685         } else {
1686                 *length = ciw->count;
1687                 *buffer = rcd_buf;
1688         }
1689         return ret;
1690 }
1691
1692 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1693 {
1694         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1695         card->info.chpid = prcd[30];
1696         card->info.unit_addr2 = prcd[31];
1697         card->info.cula = prcd[63];
1698         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1699                                (prcd[0x11] == _ascebc['M']));
1700 }
1701
1702 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1703 {
1704         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1705         struct diag26c_vnic_resp *response = NULL;
1706         struct diag26c_vnic_req *request = NULL;
1707         struct ccw_dev_id id;
1708         char userid[80];
1709         int rc = 0;
1710
1711         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1712
1713         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1714         if (rc)
1715                 goto out;
1716
1717         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1718         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1719         if (!request || !response) {
1720                 rc = -ENOMEM;
1721                 goto out;
1722         }
1723
1724         ccw_device_get_id(CARD_RDEV(card), &id);
1725         request->resp_buf_len = sizeof(*response);
1726         request->resp_version = DIAG26C_VERSION6_VM65918;
1727         request->req_format = DIAG26C_VNIC_INFO;
1728         ASCEBC(userid, 8);
1729         memcpy(&request->sys_name, userid, 8);
1730         request->devno = id.devno;
1731
1732         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1733         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1734         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1735         if (rc)
1736                 goto out;
1737         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1738
1739         if (request->resp_buf_len < sizeof(*response) ||
1740             response->version != request->resp_version) {
1741                 rc = -EIO;
1742                 goto out;
1743         }
1744
1745         if (response->protocol == VNIC_INFO_PROT_L2)
1746                 disc = QETH_DISCIPLINE_LAYER2;
1747         else if (response->protocol == VNIC_INFO_PROT_L3)
1748                 disc = QETH_DISCIPLINE_LAYER3;
1749
1750 out:
1751         kfree(response);
1752         kfree(request);
1753         if (rc)
1754                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1755         return disc;
1756 }
1757
1758 /* Determine whether the device requires a specific layer discipline */
1759 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1760 {
1761         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1762
1763         if (card->info.type == QETH_CARD_TYPE_OSM ||
1764             card->info.type == QETH_CARD_TYPE_OSN)
1765                 disc = QETH_DISCIPLINE_LAYER2;
1766         else if (card->info.guestlan)
1767                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1768                                 QETH_DISCIPLINE_LAYER3 :
1769                                 qeth_vm_detect_layer(card);
1770
1771         switch (disc) {
1772         case QETH_DISCIPLINE_LAYER2:
1773                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1774                 break;
1775         case QETH_DISCIPLINE_LAYER3:
1776                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1777                 break;
1778         default:
1779                 QETH_DBF_TEXT(SETUP, 3, "force no");
1780         }
1781
1782         return disc;
1783 }
1784
1785 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1786 {
1787         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1788
1789         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1790             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1791                 card->info.blkt.time_total = 0;
1792                 card->info.blkt.inter_packet = 0;
1793                 card->info.blkt.inter_packet_jumbo = 0;
1794         } else {
1795                 card->info.blkt.time_total = 250;
1796                 card->info.blkt.inter_packet = 5;
1797                 card->info.blkt.inter_packet_jumbo = 15;
1798         }
1799 }
1800
1801 static void qeth_init_tokens(struct qeth_card *card)
1802 {
1803         card->token.issuer_rm_w = 0x00010103UL;
1804         card->token.cm_filter_w = 0x00010108UL;
1805         card->token.cm_connection_w = 0x0001010aUL;
1806         card->token.ulp_filter_w = 0x0001010bUL;
1807         card->token.ulp_connection_w = 0x0001010dUL;
1808 }
1809
1810 static void qeth_init_func_level(struct qeth_card *card)
1811 {
1812         switch (card->info.type) {
1813         case QETH_CARD_TYPE_IQD:
1814                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1815                 break;
1816         case QETH_CARD_TYPE_OSD:
1817         case QETH_CARD_TYPE_OSN:
1818                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1819                 break;
1820         default:
1821                 break;
1822         }
1823 }
1824
1825 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1826                 void (*idx_reply_cb)(struct qeth_channel *,
1827                         struct qeth_cmd_buffer *))
1828 {
1829         struct qeth_cmd_buffer *iob;
1830         unsigned long flags;
1831         int rc;
1832         struct qeth_card *card;
1833
1834         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1835         card = CARD_FROM_CDEV(channel->ccwdev);
1836         iob = qeth_get_buffer(channel);
1837         if (!iob)
1838                 return -ENOMEM;
1839         iob->callback = idx_reply_cb;
1840         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
1841
1842         wait_event(card->wait_q,
1843                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1844         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1845         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1846         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1847                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1848         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1849
1850         if (rc) {
1851                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1852                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1853                 atomic_set(&channel->irq_pending, 0);
1854                 wake_up(&card->wait_q);
1855                 return rc;
1856         }
1857         rc = wait_event_interruptible_timeout(card->wait_q,
1858                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1859         if (rc == -ERESTARTSYS)
1860                 return rc;
1861         if (channel->state != CH_STATE_UP) {
1862                 rc = -ETIME;
1863                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1864         } else
1865                 rc = 0;
1866         return rc;
1867 }
1868
1869 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1870                 void (*idx_reply_cb)(struct qeth_channel *,
1871                         struct qeth_cmd_buffer *))
1872 {
1873         struct qeth_card *card;
1874         struct qeth_cmd_buffer *iob;
1875         unsigned long flags;
1876         __u16 temp;
1877         __u8 tmp;
1878         int rc;
1879         struct ccw_dev_id temp_devid;
1880
1881         card = CARD_FROM_CDEV(channel->ccwdev);
1882
1883         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1884
1885         iob = qeth_get_buffer(channel);
1886         if (!iob)
1887                 return -ENOMEM;
1888         iob->callback = idx_reply_cb;
1889         qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
1890                        iob->data);
1891         if (channel == &card->write) {
1892                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1893                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1894                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1895                 card->seqno.trans_hdr++;
1896         } else {
1897                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1898                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1899                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1900         }
1901         tmp = ((u8)card->dev->dev_port) | 0x80;
1902         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1903         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1904                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1905         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1906                &card->info.func_level, sizeof(__u16));
1907         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1908         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1909         temp = (card->info.cula << 8) + card->info.unit_addr2;
1910         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1911
1912         wait_event(card->wait_q,
1913                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1914         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1915         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1916         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1917                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1918         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1919
1920         if (rc) {
1921                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1922                         rc);
1923                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1924                 atomic_set(&channel->irq_pending, 0);
1925                 wake_up(&card->wait_q);
1926                 return rc;
1927         }
1928         rc = wait_event_interruptible_timeout(card->wait_q,
1929                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1930         if (rc == -ERESTARTSYS)
1931                 return rc;
1932         if (channel->state != CH_STATE_ACTIVATING) {
1933                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1934                         " failed to recover an error on the device\n");
1935                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1936                         dev_name(&channel->ccwdev->dev));
1937                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1938                 return -ETIME;
1939         }
1940         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1941 }
1942
1943 static int qeth_peer_func_level(int level)
1944 {
1945         if ((level & 0xff) == 8)
1946                 return (level & 0xff) + 0x400;
1947         if (((level >> 8) & 3) == 1)
1948                 return (level & 0xff) + 0x200;
1949         return level;
1950 }
1951
1952 static void qeth_idx_write_cb(struct qeth_channel *channel,
1953                 struct qeth_cmd_buffer *iob)
1954 {
1955         struct qeth_card *card;
1956         __u16 temp;
1957
1958         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1959
1960         if (channel->state == CH_STATE_DOWN) {
1961                 channel->state = CH_STATE_ACTIVATING;
1962                 goto out;
1963         }
1964         card = CARD_FROM_CDEV(channel->ccwdev);
1965
1966         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1967                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1968                         dev_err(&channel->ccwdev->dev,
1969                                 "The adapter is used exclusively by another "
1970                                 "host\n");
1971                 else
1972                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1973                                 " negative reply\n",
1974                                 dev_name(&channel->ccwdev->dev));
1975                 goto out;
1976         }
1977         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1978         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1979                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1980                         "function level mismatch (sent: 0x%x, received: "
1981                         "0x%x)\n", dev_name(&channel->ccwdev->dev),
1982                         card->info.func_level, temp);
1983                 goto out;
1984         }
1985         channel->state = CH_STATE_UP;
1986 out:
1987         qeth_release_buffer(channel, iob);
1988 }
1989
1990 static void qeth_idx_read_cb(struct qeth_channel *channel,
1991                 struct qeth_cmd_buffer *iob)
1992 {
1993         struct qeth_card *card;
1994         __u16 temp;
1995
1996         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1997         if (channel->state == CH_STATE_DOWN) {
1998                 channel->state = CH_STATE_ACTIVATING;
1999                 goto out;
2000         }
2001
2002         card = CARD_FROM_CDEV(channel->ccwdev);
2003         if (qeth_check_idx_response(card, iob->data))
2004                         goto out;
2005
2006         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2007                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2008                 case QETH_IDX_ACT_ERR_EXCL:
2009                         dev_err(&channel->ccwdev->dev,
2010                                 "The adapter is used exclusively by another "
2011                                 "host\n");
2012                         break;
2013                 case QETH_IDX_ACT_ERR_AUTH:
2014                 case QETH_IDX_ACT_ERR_AUTH_USER:
2015                         dev_err(&channel->ccwdev->dev,
2016                                 "Setting the device online failed because of "
2017                                 "insufficient authorization\n");
2018                         break;
2019                 default:
2020                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2021                                 " negative reply\n",
2022                                 dev_name(&channel->ccwdev->dev));
2023                 }
2024                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2025                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2026                 goto out;
2027         }
2028
2029         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2030         if (temp != qeth_peer_func_level(card->info.func_level)) {
2031                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2032                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2033                         dev_name(&channel->ccwdev->dev),
2034                         card->info.func_level, temp);
2035                 goto out;
2036         }
2037         memcpy(&card->token.issuer_rm_r,
2038                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2039                QETH_MPC_TOKEN_LENGTH);
2040         memcpy(&card->info.mcl_level[0],
2041                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2042         channel->state = CH_STATE_UP;
2043 out:
2044         qeth_release_buffer(channel, iob);
2045 }
2046
2047 void qeth_prepare_control_data(struct qeth_card *card, int len,
2048                 struct qeth_cmd_buffer *iob)
2049 {
2050         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
2051         iob->callback = qeth_release_buffer;
2052
2053         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2054                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2055         card->seqno.trans_hdr++;
2056         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2057                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2058         card->seqno.pdu_hdr++;
2059         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2060                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2061         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2062 }
2063 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2064
2065 /**
2066  * qeth_send_control_data() -   send control command to the card
2067  * @card:                       qeth_card structure pointer
2068  * @len:                        size of the command buffer
2069  * @iob:                        qeth_cmd_buffer pointer
2070  * @reply_cb:                   callback function pointer
2071  * @cb_card:                    pointer to the qeth_card structure
2072  * @cb_reply:                   pointer to the qeth_reply structure
2073  * @cb_cmd:                     pointer to the original iob for non-IPA
2074  *                              commands, or to the qeth_ipa_cmd structure
2075  *                              for the IPA commands.
2076  * @reply_param:                private pointer passed to the callback
2077  *
2078  * Returns the value of the `return_code' field of the response
2079  * block returned from the hardware, or other error indication.
2080  * Value of zero indicates successful execution of the command.
2081  *
2082  * Callback function gets called one or more times, with cb_cmd
2083  * pointing to the response returned by the hardware. Callback
2084  * function must return non-zero if more reply blocks are expected,
2085  * and zero if the last or only reply block is received. Callback
2086  * function can get the value of the reply_param pointer from the
2087  * field 'param' of the structure qeth_reply.
2088  */
2089
2090 int qeth_send_control_data(struct qeth_card *card, int len,
2091                 struct qeth_cmd_buffer *iob,
2092                 int (*reply_cb)(struct qeth_card *cb_card,
2093                                 struct qeth_reply *cb_reply,
2094                                 unsigned long cb_cmd),
2095                 void *reply_param)
2096 {
2097         struct qeth_channel *channel = iob->channel;
2098         int rc;
2099         unsigned long flags;
2100         struct qeth_reply *reply = NULL;
2101         unsigned long timeout, event_timeout;
2102         struct qeth_ipa_cmd *cmd = NULL;
2103
2104         QETH_CARD_TEXT(card, 2, "sendctl");
2105
2106         if (card->read_or_write_problem) {
2107                 qeth_release_buffer(channel, iob);
2108                 return -EIO;
2109         }
2110         reply = qeth_alloc_reply(card);
2111         if (!reply) {
2112                 return -ENOMEM;
2113         }
2114         reply->callback = reply_cb;
2115         reply->param = reply_param;
2116
2117         init_waitqueue_head(&reply->wait_q);
2118
2119         while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
2120
2121         if (IS_IPA(iob->data)) {
2122                 cmd = __ipa_cmd(iob);
2123                 cmd->hdr.seqno = card->seqno.ipa++;
2124                 reply->seqno = cmd->hdr.seqno;
2125                 event_timeout = QETH_IPA_TIMEOUT;
2126         } else {
2127                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2128                 event_timeout = QETH_TIMEOUT;
2129         }
2130         qeth_prepare_control_data(card, len, iob);
2131
2132         spin_lock_irqsave(&card->lock, flags);
2133         list_add_tail(&reply->list, &card->cmd_waiter_list);
2134         spin_unlock_irqrestore(&card->lock, flags);
2135
2136         timeout = jiffies + event_timeout;
2137
2138         QETH_CARD_TEXT(card, 6, "noirqpnd");
2139         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
2140         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
2141                                       (addr_t) iob, 0, 0, event_timeout);
2142         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
2143         if (rc) {
2144                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2145                         "ccw_device_start rc = %i\n",
2146                         dev_name(&channel->ccwdev->dev), rc);
2147                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2148                 spin_lock_irqsave(&card->lock, flags);
2149                 list_del_init(&reply->list);
2150                 qeth_put_reply(reply);
2151                 spin_unlock_irqrestore(&card->lock, flags);
2152                 qeth_release_buffer(channel, iob);
2153                 atomic_set(&channel->irq_pending, 0);
2154                 wake_up(&card->wait_q);
2155                 return rc;
2156         }
2157
2158         /* we have only one long running ipassist, since we can ensure
2159            process context of this command we can sleep */
2160         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2161             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2162                 if (!wait_event_timeout(reply->wait_q,
2163                     atomic_read(&reply->received), event_timeout))
2164                         goto time_err;
2165         } else {
2166                 while (!atomic_read(&reply->received)) {
2167                         if (time_after(jiffies, timeout))
2168                                 goto time_err;
2169                         cpu_relax();
2170                 }
2171         }
2172
2173         rc = reply->rc;
2174         qeth_put_reply(reply);
2175         return rc;
2176
2177 time_err:
2178         reply->rc = -ETIME;
2179         spin_lock_irqsave(&reply->card->lock, flags);
2180         list_del_init(&reply->list);
2181         spin_unlock_irqrestore(&reply->card->lock, flags);
2182         atomic_inc(&reply->received);
2183         rc = reply->rc;
2184         qeth_put_reply(reply);
2185         return rc;
2186 }
2187 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2188
2189 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2190                 unsigned long data)
2191 {
2192         struct qeth_cmd_buffer *iob;
2193
2194         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2195
2196         iob = (struct qeth_cmd_buffer *) data;
2197         memcpy(&card->token.cm_filter_r,
2198                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2199                QETH_MPC_TOKEN_LENGTH);
2200         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2201         return 0;
2202 }
2203
2204 static int qeth_cm_enable(struct qeth_card *card)
2205 {
2206         int rc;
2207         struct qeth_cmd_buffer *iob;
2208
2209         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2210
2211         iob = qeth_wait_for_buffer(&card->write);
2212         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2213         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2214                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2215         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2216                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2217
2218         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2219                                     qeth_cm_enable_cb, NULL);
2220         return rc;
2221 }
2222
2223 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2224                 unsigned long data)
2225 {
2226
2227         struct qeth_cmd_buffer *iob;
2228
2229         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2230
2231         iob = (struct qeth_cmd_buffer *) data;
2232         memcpy(&card->token.cm_connection_r,
2233                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2234                QETH_MPC_TOKEN_LENGTH);
2235         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2236         return 0;
2237 }
2238
2239 static int qeth_cm_setup(struct qeth_card *card)
2240 {
2241         int rc;
2242         struct qeth_cmd_buffer *iob;
2243
2244         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2245
2246         iob = qeth_wait_for_buffer(&card->write);
2247         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2248         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2249                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2250         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2251                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2252         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2253                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2254         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2255                                     qeth_cm_setup_cb, NULL);
2256         return rc;
2257
2258 }
2259
2260 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2261 {
2262         struct net_device *dev = card->dev;
2263         unsigned int new_mtu;
2264
2265         if (!max_mtu) {
2266                 /* IQD needs accurate max MTU to set up its RX buffers: */
2267                 if (IS_IQD(card))
2268                         return -EINVAL;
2269                 /* tolerate quirky HW: */
2270                 max_mtu = ETH_MAX_MTU;
2271         }
2272
2273         rtnl_lock();
2274         if (IS_IQD(card)) {
2275                 /* move any device with default MTU to new max MTU: */
2276                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2277
2278                 /* adjust RX buffer size to new max MTU: */
2279                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2280                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2281                         qeth_free_qdio_buffers(card);
2282         } else {
2283                 if (dev->mtu)
2284                         new_mtu = dev->mtu;
2285                 /* default MTUs for first setup: */
2286                 else if (card->options.layer2)
2287                         new_mtu = ETH_DATA_LEN;
2288                 else
2289                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2290         }
2291
2292         dev->max_mtu = max_mtu;
2293         dev->mtu = min(new_mtu, max_mtu);
2294         rtnl_unlock();
2295         return 0;
2296 }
2297
2298 static int qeth_get_mtu_outof_framesize(int framesize)
2299 {
2300         switch (framesize) {
2301         case 0x4000:
2302                 return 8192;
2303         case 0x6000:
2304                 return 16384;
2305         case 0xa000:
2306                 return 32768;
2307         case 0xffff:
2308                 return 57344;
2309         default:
2310                 return 0;
2311         }
2312 }
2313
2314 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2315                 unsigned long data)
2316 {
2317
2318         __u16 mtu, framesize;
2319         __u16 len;
2320         __u8 link_type;
2321         struct qeth_cmd_buffer *iob;
2322
2323         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2324
2325         iob = (struct qeth_cmd_buffer *) data;
2326         memcpy(&card->token.ulp_filter_r,
2327                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2328                QETH_MPC_TOKEN_LENGTH);
2329         if (card->info.type == QETH_CARD_TYPE_IQD) {
2330                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2331                 mtu = qeth_get_mtu_outof_framesize(framesize);
2332         } else {
2333                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2334         }
2335         *(u16 *)reply->param = mtu;
2336
2337         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2338         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2339                 memcpy(&link_type,
2340                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2341                 card->info.link_type = link_type;
2342         } else
2343                 card->info.link_type = 0;
2344         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2345         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2346         return 0;
2347 }
2348
2349 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2350 {
2351         if (IS_OSN(card))
2352                 return QETH_PROT_OSN2;
2353         return (card->options.layer2 == 1) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2354 }
2355
2356 static int qeth_ulp_enable(struct qeth_card *card)
2357 {
2358         u8 prot_type = qeth_mpc_select_prot_type(card);
2359         struct qeth_cmd_buffer *iob;
2360         u16 max_mtu;
2361         int rc;
2362
2363         /*FIXME: trace view callbacks*/
2364         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2365
2366         iob = qeth_wait_for_buffer(&card->write);
2367         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2368
2369         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2370         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2371         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2372                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2373         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2374                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2375         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2376                                     qeth_ulp_enable_cb, &max_mtu);
2377         if (rc)
2378                 return rc;
2379         return qeth_update_max_mtu(card, max_mtu);
2380 }
2381
2382 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2383                 unsigned long data)
2384 {
2385         struct qeth_cmd_buffer *iob;
2386
2387         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2388
2389         iob = (struct qeth_cmd_buffer *) data;
2390         memcpy(&card->token.ulp_connection_r,
2391                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2392                QETH_MPC_TOKEN_LENGTH);
2393         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2394                      3)) {
2395                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2396                 dev_err(&card->gdev->dev, "A connection could not be "
2397                         "established because of an OLM limit\n");
2398                 iob->rc = -EMLINK;
2399         }
2400         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2401         return 0;
2402 }
2403
2404 static int qeth_ulp_setup(struct qeth_card *card)
2405 {
2406         int rc;
2407         __u16 temp;
2408         struct qeth_cmd_buffer *iob;
2409         struct ccw_dev_id dev_id;
2410
2411         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2412
2413         iob = qeth_wait_for_buffer(&card->write);
2414         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2415
2416         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2417                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2418         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2419                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2420         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2421                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2422
2423         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2424         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2425         temp = (card->info.cula << 8) + card->info.unit_addr2;
2426         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2427         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2428                                     qeth_ulp_setup_cb, NULL);
2429         return rc;
2430 }
2431
2432 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2433 {
2434         struct qeth_qdio_out_buffer *newbuf;
2435
2436         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2437         if (!newbuf)
2438                 return -ENOMEM;
2439
2440         newbuf->buffer = q->qdio_bufs[bidx];
2441         skb_queue_head_init(&newbuf->skb_list);
2442         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2443         newbuf->q = q;
2444         newbuf->next_pending = q->bufs[bidx];
2445         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2446         q->bufs[bidx] = newbuf;
2447         return 0;
2448 }
2449
2450 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2451 {
2452         if (!q)
2453                 return;
2454
2455         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2456         kfree(q);
2457 }
2458
2459 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2460 {
2461         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2462
2463         if (!q)
2464                 return NULL;
2465
2466         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2467                 kfree(q);
2468                 return NULL;
2469         }
2470         return q;
2471 }
2472
2473 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2474 {
2475         int i, j;
2476
2477         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2478
2479         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2480                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2481                 return 0;
2482
2483         QETH_DBF_TEXT(SETUP, 2, "inq");
2484         card->qdio.in_q = qeth_alloc_qdio_queue();
2485         if (!card->qdio.in_q)
2486                 goto out_nomem;
2487
2488         /* inbound buffer pool */
2489         if (qeth_alloc_buffer_pool(card))
2490                 goto out_freeinq;
2491
2492         /* outbound */
2493         card->qdio.out_qs =
2494                 kcalloc(card->qdio.no_out_queues,
2495                         sizeof(struct qeth_qdio_out_q *),
2496                         GFP_KERNEL);
2497         if (!card->qdio.out_qs)
2498                 goto out_freepool;
2499         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2500                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2501                 if (!card->qdio.out_qs[i])
2502                         goto out_freeoutq;
2503                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2504                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2505                 card->qdio.out_qs[i]->queue_no = i;
2506                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2507                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2508                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2509                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2510                                 goto out_freeoutqbufs;
2511                 }
2512         }
2513
2514         /* completion */
2515         if (qeth_alloc_cq(card))
2516                 goto out_freeoutq;
2517
2518         return 0;
2519
2520 out_freeoutqbufs:
2521         while (j > 0) {
2522                 --j;
2523                 kmem_cache_free(qeth_qdio_outbuf_cache,
2524                                 card->qdio.out_qs[i]->bufs[j]);
2525                 card->qdio.out_qs[i]->bufs[j] = NULL;
2526         }
2527 out_freeoutq:
2528         while (i > 0) {
2529                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2530                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2531         }
2532         kfree(card->qdio.out_qs);
2533         card->qdio.out_qs = NULL;
2534 out_freepool:
2535         qeth_free_buffer_pool(card);
2536 out_freeinq:
2537         qeth_free_qdio_queue(card->qdio.in_q);
2538         card->qdio.in_q = NULL;
2539 out_nomem:
2540         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2541         return -ENOMEM;
2542 }
2543
2544 static void qeth_free_qdio_buffers(struct qeth_card *card)
2545 {
2546         int i, j;
2547
2548         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2549                 QETH_QDIO_UNINITIALIZED)
2550                 return;
2551
2552         qeth_free_cq(card);
2553         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2554         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2555                 if (card->qdio.in_q->bufs[j].rx_skb)
2556                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2557         }
2558         qeth_free_qdio_queue(card->qdio.in_q);
2559         card->qdio.in_q = NULL;
2560         /* inbound buffer pool */
2561         qeth_free_buffer_pool(card);
2562         /* free outbound qdio_qs */
2563         if (card->qdio.out_qs) {
2564                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2565                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2566                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2567                 }
2568                 kfree(card->qdio.out_qs);
2569                 card->qdio.out_qs = NULL;
2570         }
2571 }
2572
2573 static void qeth_create_qib_param_field(struct qeth_card *card,
2574                 char *param_field)
2575 {
2576
2577         param_field[0] = _ascebc['P'];
2578         param_field[1] = _ascebc['C'];
2579         param_field[2] = _ascebc['I'];
2580         param_field[3] = _ascebc['T'];
2581         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2582         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2583         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2584 }
2585
2586 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2587                 char *param_field)
2588 {
2589         param_field[16] = _ascebc['B'];
2590         param_field[17] = _ascebc['L'];
2591         param_field[18] = _ascebc['K'];
2592         param_field[19] = _ascebc['T'];
2593         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2594         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2595         *((unsigned int *) (&param_field[28])) =
2596                 card->info.blkt.inter_packet_jumbo;
2597 }
2598
2599 static int qeth_qdio_activate(struct qeth_card *card)
2600 {
2601         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2602         return qdio_activate(CARD_DDEV(card));
2603 }
2604
2605 static int qeth_dm_act(struct qeth_card *card)
2606 {
2607         int rc;
2608         struct qeth_cmd_buffer *iob;
2609
2610         QETH_DBF_TEXT(SETUP, 2, "dmact");
2611
2612         iob = qeth_wait_for_buffer(&card->write);
2613         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2614
2615         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2616                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2617         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2618                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2619         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2620         return rc;
2621 }
2622
2623 static int qeth_mpc_initialize(struct qeth_card *card)
2624 {
2625         int rc;
2626
2627         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2628
2629         rc = qeth_issue_next_read(card);
2630         if (rc) {
2631                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2632                 return rc;
2633         }
2634         rc = qeth_cm_enable(card);
2635         if (rc) {
2636                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2637                 goto out_qdio;
2638         }
2639         rc = qeth_cm_setup(card);
2640         if (rc) {
2641                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2642                 goto out_qdio;
2643         }
2644         rc = qeth_ulp_enable(card);
2645         if (rc) {
2646                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2647                 goto out_qdio;
2648         }
2649         rc = qeth_ulp_setup(card);
2650         if (rc) {
2651                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2652                 goto out_qdio;
2653         }
2654         rc = qeth_alloc_qdio_buffers(card);
2655         if (rc) {
2656                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2657                 goto out_qdio;
2658         }
2659         rc = qeth_qdio_establish(card);
2660         if (rc) {
2661                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2662                 qeth_free_qdio_buffers(card);
2663                 goto out_qdio;
2664         }
2665         rc = qeth_qdio_activate(card);
2666         if (rc) {
2667                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2668                 goto out_qdio;
2669         }
2670         rc = qeth_dm_act(card);
2671         if (rc) {
2672                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2673                 goto out_qdio;
2674         }
2675
2676         return 0;
2677 out_qdio:
2678         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2679         qdio_free(CARD_DDEV(card));
2680         return rc;
2681 }
2682
2683 void qeth_print_status_message(struct qeth_card *card)
2684 {
2685         switch (card->info.type) {
2686         case QETH_CARD_TYPE_OSD:
2687         case QETH_CARD_TYPE_OSM:
2688         case QETH_CARD_TYPE_OSX:
2689                 /* VM will use a non-zero first character
2690                  * to indicate a HiperSockets like reporting
2691                  * of the level OSA sets the first character to zero
2692                  * */
2693                 if (!card->info.mcl_level[0]) {
2694                         sprintf(card->info.mcl_level, "%02x%02x",
2695                                 card->info.mcl_level[2],
2696                                 card->info.mcl_level[3]);
2697                         break;
2698                 }
2699                 /* fallthrough */
2700         case QETH_CARD_TYPE_IQD:
2701                 if ((card->info.guestlan) ||
2702                     (card->info.mcl_level[0] & 0x80)) {
2703                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2704                                 card->info.mcl_level[0]];
2705                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2706                                 card->info.mcl_level[1]];
2707                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2708                                 card->info.mcl_level[2]];
2709                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2710                                 card->info.mcl_level[3]];
2711                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2712                 }
2713                 break;
2714         default:
2715                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2716         }
2717         dev_info(&card->gdev->dev,
2718                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2719                  qeth_get_cardname(card),
2720                  (card->info.mcl_level[0]) ? " (level: " : "",
2721                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2722                  (card->info.mcl_level[0]) ? ")" : "",
2723                  qeth_get_cardname_short(card));
2724 }
2725 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2726
2727 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2728 {
2729         struct qeth_buffer_pool_entry *entry;
2730
2731         QETH_CARD_TEXT(card, 5, "inwrklst");
2732
2733         list_for_each_entry(entry,
2734                             &card->qdio.init_pool.entry_list, init_list) {
2735                 qeth_put_buffer_pool_entry(card, entry);
2736         }
2737 }
2738
2739 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2740                                         struct qeth_card *card)
2741 {
2742         struct list_head *plh;
2743         struct qeth_buffer_pool_entry *entry;
2744         int i, free;
2745         struct page *page;
2746
2747         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2748                 return NULL;
2749
2750         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2751                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2752                 free = 1;
2753                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2754                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2755                                 free = 0;
2756                                 break;
2757                         }
2758                 }
2759                 if (free) {
2760                         list_del_init(&entry->list);
2761                         return entry;
2762                 }
2763         }
2764
2765         /* no free buffer in pool so take first one and swap pages */
2766         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2767                         struct qeth_buffer_pool_entry, list);
2768         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2769                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2770                         page = alloc_page(GFP_ATOMIC);
2771                         if (!page) {
2772                                 return NULL;
2773                         } else {
2774                                 free_page((unsigned long)entry->elements[i]);
2775                                 entry->elements[i] = page_address(page);
2776                                 if (card->options.performance_stats)
2777                                         card->perf_stats.sg_alloc_page_rx++;
2778                         }
2779                 }
2780         }
2781         list_del_init(&entry->list);
2782         return entry;
2783 }
2784
2785 static int qeth_init_input_buffer(struct qeth_card *card,
2786                 struct qeth_qdio_buffer *buf)
2787 {
2788         struct qeth_buffer_pool_entry *pool_entry;
2789         int i;
2790
2791         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2792                 buf->rx_skb = netdev_alloc_skb(card->dev,
2793                                                QETH_RX_PULL_LEN + ETH_HLEN);
2794                 if (!buf->rx_skb)
2795                         return 1;
2796         }
2797
2798         pool_entry = qeth_find_free_buffer_pool_entry(card);
2799         if (!pool_entry)
2800                 return 1;
2801
2802         /*
2803          * since the buffer is accessed only from the input_tasklet
2804          * there shouldn't be a need to synchronize; also, since we use
2805          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2806          * buffers
2807          */
2808
2809         buf->pool_entry = pool_entry;
2810         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2811                 buf->buffer->element[i].length = PAGE_SIZE;
2812                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2813                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2814                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2815                 else
2816                         buf->buffer->element[i].eflags = 0;
2817                 buf->buffer->element[i].sflags = 0;
2818         }
2819         return 0;
2820 }
2821
2822 int qeth_init_qdio_queues(struct qeth_card *card)
2823 {
2824         int i, j;
2825         int rc;
2826
2827         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2828
2829         /* inbound queue */
2830         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2831         memset(&card->rx, 0, sizeof(struct qeth_rx));
2832         qeth_initialize_working_pool_list(card);
2833         /*give only as many buffers to hardware as we have buffer pool entries*/
2834         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2835                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2836         card->qdio.in_q->next_buf_to_init =
2837                 card->qdio.in_buf_pool.buf_count - 1;
2838         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2839                      card->qdio.in_buf_pool.buf_count - 1);
2840         if (rc) {
2841                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2842                 return rc;
2843         }
2844
2845         /* completion */
2846         rc = qeth_cq_init(card);
2847         if (rc) {
2848                 return rc;
2849         }
2850
2851         /* outbound queue */
2852         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2853                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2854                                    QDIO_MAX_BUFFERS_PER_Q);
2855                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2856                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2857                                                  card->qdio.out_qs[i]->bufs[j]);
2858                 }
2859                 card->qdio.out_qs[i]->card = card;
2860                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2861                 card->qdio.out_qs[i]->do_pack = 0;
2862                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2863                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2864                 atomic_set(&card->qdio.out_qs[i]->state,
2865                            QETH_OUT_Q_UNLOCKED);
2866         }
2867         return 0;
2868 }
2869 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2870
2871 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2872 {
2873         switch (link_type) {
2874         case QETH_LINK_TYPE_HSTR:
2875                 return 2;
2876         default:
2877                 return 1;
2878         }
2879 }
2880
2881 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2882                 struct qeth_ipa_cmd *cmd, __u8 command,
2883                 enum qeth_prot_versions prot)
2884 {
2885         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2886         cmd->hdr.command = command;
2887         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2888         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2889         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2890         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2891         if (card->options.layer2)
2892                 cmd->hdr.prim_version_no = 2;
2893         else
2894                 cmd->hdr.prim_version_no = 1;
2895         cmd->hdr.param_count = 1;
2896         cmd->hdr.prot_version = prot;
2897         cmd->hdr.ipa_supported = 0;
2898         cmd->hdr.ipa_enabled = 0;
2899 }
2900
2901 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2902                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2903 {
2904         struct qeth_cmd_buffer *iob;
2905
2906         iob = qeth_get_buffer(&card->write);
2907         if (iob) {
2908                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2909         } else {
2910                 dev_warn(&card->gdev->dev,
2911                          "The qeth driver ran out of channel command buffers\n");
2912                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2913                                  dev_name(&card->gdev->dev));
2914         }
2915
2916         return iob;
2917 }
2918 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2919
2920 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob)
2921 {
2922         u8 prot_type = qeth_mpc_select_prot_type(card);
2923
2924         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2925         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2926         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2927                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2928 }
2929 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2930
2931 /**
2932  * qeth_send_ipa_cmd() - send an IPA command
2933  *
2934  * See qeth_send_control_data() for explanation of the arguments.
2935  */
2936
2937 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2938                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2939                         unsigned long),
2940                 void *reply_param)
2941 {
2942         int rc;
2943
2944         QETH_CARD_TEXT(card, 4, "sendipa");
2945         qeth_prepare_ipa_cmd(card, iob);
2946         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2947                                                 iob, reply_cb, reply_param);
2948         if (rc == -ETIME) {
2949                 qeth_clear_ipacmd_list(card);
2950                 qeth_schedule_recovery(card);
2951         }
2952         return rc;
2953 }
2954 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2955
2956 static int qeth_send_startlan(struct qeth_card *card)
2957 {
2958         int rc;
2959         struct qeth_cmd_buffer *iob;
2960
2961         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2962
2963         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2964         if (!iob)
2965                 return -ENOMEM;
2966         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
2967         return rc;
2968 }
2969
2970 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2971 {
2972         if (!cmd->hdr.return_code)
2973                 cmd->hdr.return_code =
2974                         cmd->data.setadapterparms.hdr.return_code;
2975         return cmd->hdr.return_code;
2976 }
2977
2978 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2979                 struct qeth_reply *reply, unsigned long data)
2980 {
2981         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2982
2983         QETH_CARD_TEXT(card, 3, "quyadpcb");
2984         if (qeth_setadpparms_inspect_rc(cmd))
2985                 return 0;
2986
2987         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2988                 card->info.link_type =
2989                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2990                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
2991         }
2992         card->options.adp.supported_funcs =
2993                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2994         return 0;
2995 }
2996
2997 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2998                 __u32 command, __u32 cmdlen)
2999 {
3000         struct qeth_cmd_buffer *iob;
3001         struct qeth_ipa_cmd *cmd;
3002
3003         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3004                                      QETH_PROT_IPV4);
3005         if (iob) {
3006                 cmd = __ipa_cmd(iob);
3007                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3008                 cmd->data.setadapterparms.hdr.command_code = command;
3009                 cmd->data.setadapterparms.hdr.used_total = 1;
3010                 cmd->data.setadapterparms.hdr.seq_no = 1;
3011         }
3012
3013         return iob;
3014 }
3015
3016 static int qeth_query_setadapterparms(struct qeth_card *card)
3017 {
3018         int rc;
3019         struct qeth_cmd_buffer *iob;
3020
3021         QETH_CARD_TEXT(card, 3, "queryadp");
3022         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3023                                    sizeof(struct qeth_ipacmd_setadpparms));
3024         if (!iob)
3025                 return -ENOMEM;
3026         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3027         return rc;
3028 }
3029
3030 static int qeth_query_ipassists_cb(struct qeth_card *card,
3031                 struct qeth_reply *reply, unsigned long data)
3032 {
3033         struct qeth_ipa_cmd *cmd;
3034
3035         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3036
3037         cmd = (struct qeth_ipa_cmd *) data;
3038
3039         switch (cmd->hdr.return_code) {
3040         case IPA_RC_NOTSUPP:
3041         case IPA_RC_L2_UNSUPPORTED_CMD:
3042                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3043                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3044                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3045                 return -0;
3046         default:
3047                 if (cmd->hdr.return_code) {
3048                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3049                                                 "rc=%d\n",
3050                                                 dev_name(&card->gdev->dev),
3051                                                 cmd->hdr.return_code);
3052                         return 0;
3053                 }
3054         }
3055
3056         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3057                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3058                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3059         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3060                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3061                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3062         } else
3063                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3064                                         "\n", dev_name(&card->gdev->dev));
3065         return 0;
3066 }
3067
3068 static int qeth_query_ipassists(struct qeth_card *card,
3069                                 enum qeth_prot_versions prot)
3070 {
3071         int rc;
3072         struct qeth_cmd_buffer *iob;
3073
3074         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3075         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3076         if (!iob)
3077                 return -ENOMEM;
3078         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3079         return rc;
3080 }
3081
3082 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3083                                 struct qeth_reply *reply, unsigned long data)
3084 {
3085         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3086         struct qeth_query_switch_attributes *attrs;
3087         struct qeth_switch_info *sw_info;
3088
3089         QETH_CARD_TEXT(card, 2, "qswiatcb");
3090         if (qeth_setadpparms_inspect_rc(cmd))
3091                 return 0;
3092
3093         sw_info = (struct qeth_switch_info *)reply->param;
3094         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3095         sw_info->capabilities = attrs->capabilities;
3096         sw_info->settings = attrs->settings;
3097         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3098                         sw_info->settings);
3099         return 0;
3100 }
3101
3102 int qeth_query_switch_attributes(struct qeth_card *card,
3103                                  struct qeth_switch_info *sw_info)
3104 {
3105         struct qeth_cmd_buffer *iob;
3106
3107         QETH_CARD_TEXT(card, 2, "qswiattr");
3108         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3109                 return -EOPNOTSUPP;
3110         if (!netif_carrier_ok(card->dev))
3111                 return -ENOMEDIUM;
3112         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3113                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3114         if (!iob)
3115                 return -ENOMEM;
3116         return qeth_send_ipa_cmd(card, iob,
3117                                 qeth_query_switch_attributes_cb, sw_info);
3118 }
3119
3120 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3121                 struct qeth_reply *reply, unsigned long data)
3122 {
3123         struct qeth_ipa_cmd *cmd;
3124         __u16 rc;
3125
3126         cmd = (struct qeth_ipa_cmd *)data;
3127         rc = cmd->hdr.return_code;
3128         if (rc)
3129                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3130         else
3131                 card->info.diagass_support = cmd->data.diagass.ext;
3132         return 0;
3133 }
3134
3135 static int qeth_query_setdiagass(struct qeth_card *card)
3136 {
3137         struct qeth_cmd_buffer *iob;
3138         struct qeth_ipa_cmd    *cmd;
3139
3140         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3141         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3142         if (!iob)
3143                 return -ENOMEM;
3144         cmd = __ipa_cmd(iob);
3145         cmd->data.diagass.subcmd_len = 16;
3146         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3147         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3148 }
3149
3150 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3151 {
3152         unsigned long info = get_zeroed_page(GFP_KERNEL);
3153         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3154         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3155         struct ccw_dev_id ccwid;
3156         int level;
3157
3158         tid->chpid = card->info.chpid;
3159         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3160         tid->ssid = ccwid.ssid;
3161         tid->devno = ccwid.devno;
3162         if (!info)
3163                 return;
3164         level = stsi(NULL, 0, 0, 0);
3165         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3166                 tid->lparnr = info222->lpar_number;
3167         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3168                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3169                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3170         }
3171         free_page(info);
3172         return;
3173 }
3174
3175 static int qeth_hw_trap_cb(struct qeth_card *card,
3176                 struct qeth_reply *reply, unsigned long data)
3177 {
3178         struct qeth_ipa_cmd *cmd;
3179         __u16 rc;
3180
3181         cmd = (struct qeth_ipa_cmd *)data;
3182         rc = cmd->hdr.return_code;
3183         if (rc)
3184                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3185         return 0;
3186 }
3187
3188 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3189 {
3190         struct qeth_cmd_buffer *iob;
3191         struct qeth_ipa_cmd *cmd;
3192
3193         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3194         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3195         if (!iob)
3196                 return -ENOMEM;
3197         cmd = __ipa_cmd(iob);
3198         cmd->data.diagass.subcmd_len = 80;
3199         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3200         cmd->data.diagass.type = 1;
3201         cmd->data.diagass.action = action;
3202         switch (action) {
3203         case QETH_DIAGS_TRAP_ARM:
3204                 cmd->data.diagass.options = 0x0003;
3205                 cmd->data.diagass.ext = 0x00010000 +
3206                         sizeof(struct qeth_trap_id);
3207                 qeth_get_trap_id(card,
3208                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3209                 break;
3210         case QETH_DIAGS_TRAP_DISARM:
3211                 cmd->data.diagass.options = 0x0001;
3212                 break;
3213         case QETH_DIAGS_TRAP_CAPTURE:
3214                 break;
3215         }
3216         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3217 }
3218 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3219
3220 static int qeth_check_qdio_errors(struct qeth_card *card,
3221                                   struct qdio_buffer *buf,
3222                                   unsigned int qdio_error,
3223                                   const char *dbftext)
3224 {
3225         if (qdio_error) {
3226                 QETH_CARD_TEXT(card, 2, dbftext);
3227                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3228                                buf->element[15].sflags);
3229                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3230                                buf->element[14].sflags);
3231                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3232                 if ((buf->element[15].sflags) == 0x12) {
3233                         card->stats.rx_dropped++;
3234                         return 0;
3235                 } else
3236                         return 1;
3237         }
3238         return 0;
3239 }
3240
3241 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3242 {
3243         struct qeth_qdio_q *queue = card->qdio.in_q;
3244         struct list_head *lh;
3245         int count;
3246         int i;
3247         int rc;
3248         int newcount = 0;
3249
3250         count = (index < queue->next_buf_to_init)?
3251                 card->qdio.in_buf_pool.buf_count -
3252                 (queue->next_buf_to_init - index) :
3253                 card->qdio.in_buf_pool.buf_count -
3254                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3255         /* only requeue at a certain threshold to avoid SIGAs */
3256         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3257                 for (i = queue->next_buf_to_init;
3258                      i < queue->next_buf_to_init + count; ++i) {
3259                         if (qeth_init_input_buffer(card,
3260                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3261                                 break;
3262                         } else {
3263                                 newcount++;
3264                         }
3265                 }
3266
3267                 if (newcount < count) {
3268                         /* we are in memory shortage so we switch back to
3269                            traditional skb allocation and drop packages */
3270                         atomic_set(&card->force_alloc_skb, 3);
3271                         count = newcount;
3272                 } else {
3273                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3274                 }
3275
3276                 if (!count) {
3277                         i = 0;
3278                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3279                                 i++;
3280                         if (i == card->qdio.in_buf_pool.buf_count) {
3281                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3282                                 card->reclaim_index = index;
3283                                 schedule_delayed_work(
3284                                         &card->buffer_reclaim_work,
3285                                         QETH_RECLAIM_WORK_TIME);
3286                         }
3287                         return;
3288                 }
3289
3290                 /*
3291                  * according to old code it should be avoided to requeue all
3292                  * 128 buffers in order to benefit from PCI avoidance.
3293                  * this function keeps at least one buffer (the buffer at
3294                  * 'index') un-requeued -> this buffer is the first buffer that
3295                  * will be requeued the next time
3296                  */
3297                 if (card->options.performance_stats) {
3298                         card->perf_stats.inbound_do_qdio_cnt++;
3299                         card->perf_stats.inbound_do_qdio_start_time =
3300                                 qeth_get_micros();
3301                 }
3302                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3303                              queue->next_buf_to_init, count);
3304                 if (card->options.performance_stats)
3305                         card->perf_stats.inbound_do_qdio_time +=
3306                                 qeth_get_micros() -
3307                                 card->perf_stats.inbound_do_qdio_start_time;
3308                 if (rc) {
3309                         QETH_CARD_TEXT(card, 2, "qinberr");
3310                 }
3311                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3312                                           QDIO_MAX_BUFFERS_PER_Q;
3313         }
3314 }
3315
3316 static void qeth_buffer_reclaim_work(struct work_struct *work)
3317 {
3318         struct qeth_card *card = container_of(work, struct qeth_card,
3319                 buffer_reclaim_work.work);
3320
3321         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3322         qeth_queue_input_buffer(card, card->reclaim_index);
3323 }
3324
3325 static void qeth_handle_send_error(struct qeth_card *card,
3326                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3327 {
3328         int sbalf15 = buffer->buffer->element[15].sflags;
3329
3330         QETH_CARD_TEXT(card, 6, "hdsnderr");
3331         if (card->info.type == QETH_CARD_TYPE_IQD) {
3332                 if (sbalf15 == 0) {
3333                         qdio_err = 0;
3334                 } else {
3335                         qdio_err = 1;
3336                 }
3337         }
3338         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3339
3340         if (!qdio_err)
3341                 return;
3342
3343         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3344                 return;
3345
3346         QETH_CARD_TEXT(card, 1, "lnkfail");
3347         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3348                        (u16)qdio_err, (u8)sbalf15);
3349 }
3350
3351 /**
3352  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3353  * @queue: queue to check for packing buffer
3354  *
3355  * Returns number of buffers that were prepared for flush.
3356  */
3357 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3358 {
3359         struct qeth_qdio_out_buffer *buffer;
3360
3361         buffer = queue->bufs[queue->next_buf_to_fill];
3362         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3363             (buffer->next_element_to_fill > 0)) {
3364                 /* it's a packing buffer */
3365                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3366                 queue->next_buf_to_fill =
3367                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3368                 return 1;
3369         }
3370         return 0;
3371 }
3372
3373 /*
3374  * Switched to packing state if the number of used buffers on a queue
3375  * reaches a certain limit.
3376  */
3377 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3378 {
3379         if (!queue->do_pack) {
3380                 if (atomic_read(&queue->used_buffers)
3381                     >= QETH_HIGH_WATERMARK_PACK){
3382                         /* switch non-PACKING -> PACKING */
3383                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3384                         if (queue->card->options.performance_stats)
3385                                 queue->card->perf_stats.sc_dp_p++;
3386                         queue->do_pack = 1;
3387                 }
3388         }
3389 }
3390
3391 /*
3392  * Switches from packing to non-packing mode. If there is a packing
3393  * buffer on the queue this buffer will be prepared to be flushed.
3394  * In that case 1 is returned to inform the caller. If no buffer
3395  * has to be flushed, zero is returned.
3396  */
3397 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3398 {
3399         if (queue->do_pack) {
3400                 if (atomic_read(&queue->used_buffers)
3401                     <= QETH_LOW_WATERMARK_PACK) {
3402                         /* switch PACKING -> non-PACKING */
3403                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3404                         if (queue->card->options.performance_stats)
3405                                 queue->card->perf_stats.sc_p_dp++;
3406                         queue->do_pack = 0;
3407                         return qeth_prep_flush_pack_buffer(queue);
3408                 }
3409         }
3410         return 0;
3411 }
3412
3413 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3414                                int count)
3415 {
3416         struct qeth_qdio_out_buffer *buf;
3417         int rc;
3418         int i;
3419         unsigned int qdio_flags;
3420
3421         for (i = index; i < index + count; ++i) {
3422                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3423                 buf = queue->bufs[bidx];
3424                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3425                                 SBAL_EFLAGS_LAST_ENTRY;
3426
3427                 if (queue->bufstates)
3428                         queue->bufstates[bidx].user = buf;
3429
3430                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3431                         continue;
3432
3433                 if (!queue->do_pack) {
3434                         if ((atomic_read(&queue->used_buffers) >=
3435                                 (QETH_HIGH_WATERMARK_PACK -
3436                                  QETH_WATERMARK_PACK_FUZZ)) &&
3437                             !atomic_read(&queue->set_pci_flags_count)) {
3438                                 /* it's likely that we'll go to packing
3439                                  * mode soon */
3440                                 atomic_inc(&queue->set_pci_flags_count);
3441                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3442                         }
3443                 } else {
3444                         if (!atomic_read(&queue->set_pci_flags_count)) {
3445                                 /*
3446                                  * there's no outstanding PCI any more, so we
3447                                  * have to request a PCI to be sure the the PCI
3448                                  * will wake at some time in the future then we
3449                                  * can flush packed buffers that might still be
3450                                  * hanging around, which can happen if no
3451                                  * further send was requested by the stack
3452                                  */
3453                                 atomic_inc(&queue->set_pci_flags_count);
3454                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3455                         }
3456                 }
3457         }
3458
3459         netif_trans_update(queue->card->dev);
3460         if (queue->card->options.performance_stats) {
3461                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3462                 queue->card->perf_stats.outbound_do_qdio_start_time =
3463                         qeth_get_micros();
3464         }
3465         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3466         if (atomic_read(&queue->set_pci_flags_count))
3467                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3468         atomic_add(count, &queue->used_buffers);
3469
3470         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3471                      queue->queue_no, index, count);
3472         if (queue->card->options.performance_stats)
3473                 queue->card->perf_stats.outbound_do_qdio_time +=
3474                         qeth_get_micros() -
3475                         queue->card->perf_stats.outbound_do_qdio_start_time;
3476         if (rc) {
3477                 queue->card->stats.tx_errors += count;
3478                 /* ignore temporary SIGA errors without busy condition */
3479                 if (rc == -ENOBUFS)
3480                         return;
3481                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3482                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3483                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3484                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3485                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3486
3487                 /* this must not happen under normal circumstances. if it
3488                  * happens something is really wrong -> recover */
3489                 qeth_schedule_recovery(queue->card);
3490                 return;
3491         }
3492         if (queue->card->options.performance_stats)
3493                 queue->card->perf_stats.bufs_sent += count;
3494 }
3495
3496 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3497 {
3498         int index;
3499         int flush_cnt = 0;
3500         int q_was_packing = 0;
3501
3502         /*
3503          * check if weed have to switch to non-packing mode or if
3504          * we have to get a pci flag out on the queue
3505          */
3506         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3507             !atomic_read(&queue->set_pci_flags_count)) {
3508                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3509                                 QETH_OUT_Q_UNLOCKED) {
3510                         /*
3511                          * If we get in here, there was no action in
3512                          * do_send_packet. So, we check if there is a
3513                          * packing buffer to be flushed here.
3514                          */
3515                         netif_stop_queue(queue->card->dev);
3516                         index = queue->next_buf_to_fill;
3517                         q_was_packing = queue->do_pack;
3518                         /* queue->do_pack may change */
3519                         barrier();
3520                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3521                         if (!flush_cnt &&
3522                             !atomic_read(&queue->set_pci_flags_count))
3523                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3524                         if (queue->card->options.performance_stats &&
3525                             q_was_packing)
3526                                 queue->card->perf_stats.bufs_sent_pack +=
3527                                         flush_cnt;
3528                         if (flush_cnt)
3529                                 qeth_flush_buffers(queue, index, flush_cnt);
3530                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3531                 }
3532         }
3533 }
3534
3535 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3536                                  unsigned long card_ptr)
3537 {
3538         struct qeth_card *card = (struct qeth_card *)card_ptr;
3539
3540         if (card->dev->flags & IFF_UP)
3541                 napi_schedule(&card->napi);
3542 }
3543
3544 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3545 {
3546         int rc;
3547
3548         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3549                 rc = -1;
3550                 goto out;
3551         } else {
3552                 if (card->options.cq == cq) {
3553                         rc = 0;
3554                         goto out;
3555                 }
3556
3557                 if (card->state != CARD_STATE_DOWN &&
3558                     card->state != CARD_STATE_RECOVER) {
3559                         rc = -1;
3560                         goto out;
3561                 }
3562
3563                 qeth_free_qdio_buffers(card);
3564                 card->options.cq = cq;
3565                 rc = 0;
3566         }
3567 out:
3568         return rc;
3569
3570 }
3571 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3572
3573 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3574                                  unsigned int queue, int first_element,
3575                                  int count)
3576 {
3577         struct qeth_qdio_q *cq = card->qdio.c_q;
3578         int i;
3579         int rc;
3580
3581         if (!qeth_is_cq(card, queue))
3582                 goto out;
3583
3584         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3585         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3586         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3587
3588         if (qdio_err) {
3589                 netif_stop_queue(card->dev);
3590                 qeth_schedule_recovery(card);
3591                 goto out;
3592         }
3593
3594         if (card->options.performance_stats) {
3595                 card->perf_stats.cq_cnt++;
3596                 card->perf_stats.cq_start_time = qeth_get_micros();
3597         }
3598
3599         for (i = first_element; i < first_element + count; ++i) {
3600                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3601                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3602                 int e = 0;
3603
3604                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3605                        buffer->element[e].addr) {
3606                         unsigned long phys_aob_addr;
3607
3608                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3609                         qeth_qdio_handle_aob(card, phys_aob_addr);
3610                         ++e;
3611                 }
3612                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3613         }
3614         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3615                     card->qdio.c_q->next_buf_to_init,
3616                     count);
3617         if (rc) {
3618                 dev_warn(&card->gdev->dev,
3619                         "QDIO reported an error, rc=%i\n", rc);
3620                 QETH_CARD_TEXT(card, 2, "qcqherr");
3621         }
3622         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3623                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3624
3625         netif_wake_queue(card->dev);
3626
3627         if (card->options.performance_stats) {
3628                 int delta_t = qeth_get_micros();
3629                 delta_t -= card->perf_stats.cq_start_time;
3630                 card->perf_stats.cq_time += delta_t;
3631         }
3632 out:
3633         return;
3634 }
3635
3636 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3637                                     unsigned int qdio_err, int queue,
3638                                     int first_elem, int count,
3639                                     unsigned long card_ptr)
3640 {
3641         struct qeth_card *card = (struct qeth_card *)card_ptr;
3642
3643         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3644         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3645
3646         if (qeth_is_cq(card, queue))
3647                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3648         else if (qdio_err)
3649                 qeth_schedule_recovery(card);
3650 }
3651
3652 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3653                                      unsigned int qdio_error, int __queue,
3654                                      int first_element, int count,
3655                                      unsigned long card_ptr)
3656 {
3657         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3658         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3659         struct qeth_qdio_out_buffer *buffer;
3660         int i;
3661
3662         QETH_CARD_TEXT(card, 6, "qdouhdl");
3663         if (qdio_error & QDIO_ERROR_FATAL) {
3664                 QETH_CARD_TEXT(card, 2, "achkcond");
3665                 netif_stop_queue(card->dev);
3666                 qeth_schedule_recovery(card);
3667                 return;
3668         }
3669         if (card->options.performance_stats) {
3670                 card->perf_stats.outbound_handler_cnt++;
3671                 card->perf_stats.outbound_handler_start_time =
3672                         qeth_get_micros();
3673         }
3674         for (i = first_element; i < (first_element + count); ++i) {
3675                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3676                 buffer = queue->bufs[bidx];
3677                 qeth_handle_send_error(card, buffer, qdio_error);
3678
3679                 if (queue->bufstates &&
3680                     (queue->bufstates[bidx].flags &
3681                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3682                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3683
3684                         if (atomic_cmpxchg(&buffer->state,
3685                                            QETH_QDIO_BUF_PRIMED,
3686                                            QETH_QDIO_BUF_PENDING) ==
3687                                 QETH_QDIO_BUF_PRIMED) {
3688                                 qeth_notify_skbs(queue, buffer,
3689                                                  TX_NOTIFY_PENDING);
3690                         }
3691                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3692
3693                         /* prepare the queue slot for re-use: */
3694                         qeth_scrub_qdio_buffer(buffer->buffer,
3695                                                QETH_MAX_BUFFER_ELEMENTS(card));
3696                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3697                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3698                                 qeth_schedule_recovery(card);
3699                         }
3700                 } else {
3701                         if (card->options.cq == QETH_CQ_ENABLED) {
3702                                 enum iucv_tx_notify n;
3703
3704                                 n = qeth_compute_cq_notification(
3705                                         buffer->buffer->element[15].sflags, 0);
3706                                 qeth_notify_skbs(queue, buffer, n);
3707                         }
3708
3709                         qeth_clear_output_buffer(queue, buffer);
3710                 }
3711                 qeth_cleanup_handled_pending(queue, bidx, 0);
3712         }
3713         atomic_sub(count, &queue->used_buffers);
3714         /* check if we need to do something on this outbound queue */
3715         if (card->info.type != QETH_CARD_TYPE_IQD)
3716                 qeth_check_outbound_queue(queue);
3717
3718         netif_wake_queue(queue->card->dev);
3719         if (card->options.performance_stats)
3720                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3721                         card->perf_stats.outbound_handler_start_time;
3722 }
3723
3724 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3725 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3726 {
3727         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3728                 return 2;
3729         return queue_num;
3730 }
3731
3732 /**
3733  * Note: Function assumes that we have 4 outbound queues.
3734  */
3735 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3736                             int ipv)
3737 {
3738         __be16 *tci;
3739         u8 tos;
3740
3741         switch (card->qdio.do_prio_queueing) {
3742         case QETH_PRIO_Q_ING_TOS:
3743         case QETH_PRIO_Q_ING_PREC:
3744                 switch (ipv) {
3745                 case 4:
3746                         tos = ipv4_get_dsfield(ip_hdr(skb));
3747                         break;
3748                 case 6:
3749                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3750                         break;
3751                 default:
3752                         return card->qdio.default_out_queue;
3753                 }
3754                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3755                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3756                 if (tos & IPTOS_MINCOST)
3757                         return qeth_cut_iqd_prio(card, 3);
3758                 if (tos & IPTOS_RELIABILITY)
3759                         return 2;
3760                 if (tos & IPTOS_THROUGHPUT)
3761                         return 1;
3762                 if (tos & IPTOS_LOWDELAY)
3763                         return 0;
3764                 break;
3765         case QETH_PRIO_Q_ING_SKB:
3766                 if (skb->priority > 5)
3767                         return 0;
3768                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3769         case QETH_PRIO_Q_ING_VLAN:
3770                 tci = &((struct ethhdr *)skb->data)->h_proto;
3771                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3772                         return qeth_cut_iqd_prio(card,
3773                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3774                 break;
3775         default:
3776                 break;
3777         }
3778         return card->qdio.default_out_queue;
3779 }
3780 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3781
3782 /**
3783  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3784  * @skb:                                SKB address
3785  *
3786  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3787  * fragmented part of the SKB. Returns zero for linear SKB.
3788  */
3789 int qeth_get_elements_for_frags(struct sk_buff *skb)
3790 {
3791         int cnt, elements = 0;
3792
3793         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3794                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3795
3796                 elements += qeth_get_elements_for_range(
3797                         (addr_t)skb_frag_address(frag),
3798                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3799         }
3800         return elements;
3801 }
3802 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3803
3804 static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)
3805 {
3806         unsigned int elements = qeth_get_elements_for_frags(skb);
3807         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3808         addr_t start = (addr_t)skb->data + data_offset;
3809
3810         if (start != end)
3811                 elements += qeth_get_elements_for_range(start, end);
3812         return elements;
3813 }
3814
3815 /**
3816  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3817  * @card:                       qeth card structure, to check max. elems.
3818  * @skb:                        SKB address
3819  * @extra_elems:                extra elems needed, to check against max.
3820  * @data_offset:                range starts at skb->data + data_offset
3821  *
3822  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3823  * skb data, including linear part and fragments. Checks if the result plus
3824  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3825  * Note: extra_elems is not included in the returned result.
3826  */
3827 int qeth_get_elements_no(struct qeth_card *card,
3828                      struct sk_buff *skb, int extra_elems, int data_offset)
3829 {
3830         int elements = qeth_count_elements(skb, data_offset);
3831
3832         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3833                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3834                         "(Number=%d / Length=%d). Discarded.\n",
3835                         elements + extra_elems, skb->len);
3836                 return 0;
3837         }
3838         return elements;
3839 }
3840 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3841
3842 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3843 {
3844         int hroom, inpage, rest;
3845
3846         if (((unsigned long)skb->data & PAGE_MASK) !=
3847             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3848                 hroom = skb_headroom(skb);
3849                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3850                 rest = len - inpage;
3851                 if (rest > hroom)
3852                         return 1;
3853                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3854                 skb->data -= rest;
3855                 skb->tail -= rest;
3856                 *hdr = (struct qeth_hdr *)skb->data;
3857                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3858         }
3859         return 0;
3860 }
3861 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3862
3863 /**
3864  * qeth_add_hw_header() - add a HW header to an skb.
3865  * @skb: skb that the HW header should be added to.
3866  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3867  *       it contains a valid pointer to a qeth_hdr.
3868  * @hdr_len: length of the HW header.
3869  * @proto_len: length of protocol headers that need to be in same page as the
3870  *             HW header.
3871  *
3872  * Returns the pushed length. If the header can't be pushed on
3873  * (eg. because it would cross a page boundary), it is allocated from
3874  * the cache instead and 0 is returned.
3875  * The number of needed buffer elements is returned in @elements.
3876  * Error to create the hdr is indicated by returning with < 0.
3877  */
3878 int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
3879                        struct qeth_hdr **hdr, unsigned int hdr_len,
3880                        unsigned int proto_len, unsigned int *elements)
3881 {
3882         const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3883         const unsigned int contiguous = proto_len ? proto_len : 1;
3884         unsigned int __elements;
3885         addr_t start, end;
3886         bool push_ok;
3887         int rc;
3888
3889 check_layout:
3890         start = (addr_t)skb->data - hdr_len;
3891         end = (addr_t)skb->data;
3892
3893         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3894                 /* Push HW header into same page as first protocol header. */
3895                 push_ok = true;
3896                 __elements = qeth_count_elements(skb, 0);
3897         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3898                 /* Push HW header into a new page. */
3899                 push_ok = true;
3900                 __elements = 1 + qeth_count_elements(skb, 0);
3901         } else {
3902                 /* Use header cache, copy protocol headers up. */
3903                 push_ok = false;
3904                 __elements = 1 + qeth_count_elements(skb, proto_len);
3905         }
3906
3907         /* Compress skb to fit into one IO buffer: */
3908         if (__elements > max_elements) {
3909                 if (!skb_is_nonlinear(skb)) {
3910                         /* Drop it, no easy way of shrinking it further. */
3911                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3912                                          max_elements, __elements, skb->len);
3913                         return -E2BIG;
3914                 }
3915
3916                 rc = skb_linearize(skb);
3917                 if (card->options.performance_stats) {
3918                         if (rc)
3919                                 card->perf_stats.tx_linfail++;
3920                         else
3921                                 card->perf_stats.tx_lin++;
3922                 }
3923                 if (rc)
3924                         return rc;
3925
3926                 /* Linearization changed the layout, re-evaluate: */
3927                 goto check_layout;
3928         }
3929
3930         *elements = __elements;
3931         /* Add the header: */
3932         if (push_ok) {
3933                 *hdr = skb_push(skb, hdr_len);
3934                 return hdr_len;
3935         }
3936         /* fall back */
3937         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3938         if (!*hdr)
3939                 return -ENOMEM;
3940         /* Copy protocol headers behind HW header: */
3941         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3942         return 0;
3943 }
3944 EXPORT_SYMBOL_GPL(qeth_add_hw_header);
3945
3946 static void __qeth_fill_buffer(struct sk_buff *skb,
3947                                struct qeth_qdio_out_buffer *buf,
3948                                bool is_first_elem, unsigned int offset)
3949 {
3950         struct qdio_buffer *buffer = buf->buffer;
3951         int element = buf->next_element_to_fill;
3952         int length = skb_headlen(skb) - offset;
3953         char *data = skb->data + offset;
3954         int length_here, cnt;
3955
3956         /* map linear part into buffer element(s) */
3957         while (length > 0) {
3958                 /* length_here is the remaining amount of data in this page */
3959                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3960                 if (length < length_here)
3961                         length_here = length;
3962
3963                 buffer->element[element].addr = data;
3964                 buffer->element[element].length = length_here;
3965                 length -= length_here;
3966                 if (is_first_elem) {
3967                         is_first_elem = false;
3968                         if (length || skb_is_nonlinear(skb))
3969                                 /* skb needs additional elements */
3970                                 buffer->element[element].eflags =
3971                                         SBAL_EFLAGS_FIRST_FRAG;
3972                         else
3973                                 buffer->element[element].eflags = 0;
3974                 } else {
3975                         buffer->element[element].eflags =
3976                                 SBAL_EFLAGS_MIDDLE_FRAG;
3977                 }
3978                 data += length_here;
3979                 element++;
3980         }
3981
3982         /* map page frags into buffer element(s) */
3983         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3984                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3985
3986                 data = skb_frag_address(frag);
3987                 length = skb_frag_size(frag);
3988                 while (length > 0) {
3989                         length_here = PAGE_SIZE -
3990                                 ((unsigned long) data % PAGE_SIZE);
3991                         if (length < length_here)
3992                                 length_here = length;
3993
3994                         buffer->element[element].addr = data;
3995                         buffer->element[element].length = length_here;
3996                         buffer->element[element].eflags =
3997                                 SBAL_EFLAGS_MIDDLE_FRAG;
3998                         length -= length_here;
3999                         data += length_here;
4000                         element++;
4001                 }
4002         }
4003
4004         if (buffer->element[element - 1].eflags)
4005                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4006         buf->next_element_to_fill = element;
4007 }
4008
4009 /**
4010  * qeth_fill_buffer() - map skb into an output buffer
4011  * @queue:      QDIO queue to submit the buffer on
4012  * @buf:        buffer to transport the skb
4013  * @skb:        skb to map into the buffer
4014  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4015  *              from qeth_core_header_cache.
4016  * @offset:     when mapping the skb, start at skb->data + offset
4017  * @hd_len:     if > 0, build a dedicated header element of this size
4018  */
4019 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4020                             struct qeth_qdio_out_buffer *buf,
4021                             struct sk_buff *skb, struct qeth_hdr *hdr,
4022                             unsigned int offset, unsigned int hd_len)
4023 {
4024         struct qdio_buffer *buffer = buf->buffer;
4025         bool is_first_elem = true;
4026         int flush_cnt = 0;
4027
4028         refcount_inc(&skb->users);
4029         skb_queue_tail(&buf->skb_list, skb);
4030
4031         /* build dedicated header element */
4032         if (hd_len) {
4033                 int element = buf->next_element_to_fill;
4034                 is_first_elem = false;
4035
4036                 buffer->element[element].addr = hdr;
4037                 buffer->element[element].length = hd_len;
4038                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4039                 /* remember to free cache-allocated qeth_hdr: */
4040                 buf->is_header[element] = ((void *)hdr != skb->data);
4041                 buf->next_element_to_fill++;
4042         }
4043
4044         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4045
4046         if (!queue->do_pack) {
4047                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4048                 /* set state to PRIMED -> will be flushed */
4049                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4050                 flush_cnt = 1;
4051         } else {
4052                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4053                 if (queue->card->options.performance_stats)
4054                         queue->card->perf_stats.skbs_sent_pack++;
4055                 if (buf->next_element_to_fill >=
4056                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4057                         /*
4058                          * packed buffer if full -> set state PRIMED
4059                          * -> will be flushed
4060                          */
4061                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4062                         flush_cnt = 1;
4063                 }
4064         }
4065         return flush_cnt;
4066 }
4067
4068 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4069                              struct qeth_hdr *hdr, unsigned int offset,
4070                              unsigned int hd_len)
4071 {
4072         int index = queue->next_buf_to_fill;
4073         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
4074
4075         /*
4076          * check if buffer is empty to make sure that we do not 'overtake'
4077          * ourselves and try to fill a buffer that is already primed
4078          */
4079         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4080                 return -EBUSY;
4081         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
4082         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4083         qeth_flush_buffers(queue, index, 1);
4084         return 0;
4085 }
4086 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4087
4088 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4089                         struct sk_buff *skb, struct qeth_hdr *hdr,
4090                         unsigned int offset, unsigned int hd_len,
4091                         int elements_needed)
4092 {
4093         struct qeth_qdio_out_buffer *buffer;
4094         int start_index;
4095         int flush_count = 0;
4096         int do_pack = 0;
4097         int tmp;
4098         int rc = 0;
4099
4100         /* spin until we get the queue ... */
4101         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4102                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4103         start_index = queue->next_buf_to_fill;
4104         buffer = queue->bufs[queue->next_buf_to_fill];
4105         /*
4106          * check if buffer is empty to make sure that we do not 'overtake'
4107          * ourselves and try to fill a buffer that is already primed
4108          */
4109         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4110                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4111                 return -EBUSY;
4112         }
4113         /* check if we need to switch packing state of this queue */
4114         qeth_switch_to_packing_if_needed(queue);
4115         if (queue->do_pack) {
4116                 do_pack = 1;
4117                 /* does packet fit in current buffer? */
4118                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4119                     buffer->next_element_to_fill) < elements_needed) {
4120                         /* ... no -> set state PRIMED */
4121                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4122                         flush_count++;
4123                         queue->next_buf_to_fill =
4124                                 (queue->next_buf_to_fill + 1) %
4125                                 QDIO_MAX_BUFFERS_PER_Q;
4126                         buffer = queue->bufs[queue->next_buf_to_fill];
4127                         /* we did a step forward, so check buffer state
4128                          * again */
4129                         if (atomic_read(&buffer->state) !=
4130                             QETH_QDIO_BUF_EMPTY) {
4131                                 qeth_flush_buffers(queue, start_index,
4132                                                            flush_count);
4133                                 atomic_set(&queue->state,
4134                                                 QETH_OUT_Q_UNLOCKED);
4135                                 rc = -EBUSY;
4136                                 goto out;
4137                         }
4138                 }
4139         }
4140         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4141         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4142                                   QDIO_MAX_BUFFERS_PER_Q;
4143         flush_count += tmp;
4144         if (flush_count)
4145                 qeth_flush_buffers(queue, start_index, flush_count);
4146         else if (!atomic_read(&queue->set_pci_flags_count))
4147                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4148         /*
4149          * queue->state will go from LOCKED -> UNLOCKED or from
4150          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4151          * (switch packing state or flush buffer to get another pci flag out).
4152          * In that case we will enter this loop
4153          */
4154         while (atomic_dec_return(&queue->state)) {
4155                 start_index = queue->next_buf_to_fill;
4156                 /* check if we can go back to non-packing state */
4157                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4158                 /*
4159                  * check if we need to flush a packing buffer to get a pci
4160                  * flag out on the queue
4161                  */
4162                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4163                         tmp = qeth_prep_flush_pack_buffer(queue);
4164                 if (tmp) {
4165                         qeth_flush_buffers(queue, start_index, tmp);
4166                         flush_count += tmp;
4167                 }
4168         }
4169 out:
4170         /* at this point the queue is UNLOCKED again */
4171         if (queue->card->options.performance_stats && do_pack)
4172                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4173
4174         return rc;
4175 }
4176 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4177
4178 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4179                 struct qeth_reply *reply, unsigned long data)
4180 {
4181         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4182         struct qeth_ipacmd_setadpparms *setparms;
4183
4184         QETH_CARD_TEXT(card, 4, "prmadpcb");
4185
4186         setparms = &(cmd->data.setadapterparms);
4187         if (qeth_setadpparms_inspect_rc(cmd)) {
4188                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4189                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4190         }
4191         card->info.promisc_mode = setparms->data.mode;
4192         return 0;
4193 }
4194
4195 void qeth_setadp_promisc_mode(struct qeth_card *card)
4196 {
4197         enum qeth_ipa_promisc_modes mode;
4198         struct net_device *dev = card->dev;
4199         struct qeth_cmd_buffer *iob;
4200         struct qeth_ipa_cmd *cmd;
4201
4202         QETH_CARD_TEXT(card, 4, "setprom");
4203
4204         if (((dev->flags & IFF_PROMISC) &&
4205              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4206             (!(dev->flags & IFF_PROMISC) &&
4207              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4208                 return;
4209         mode = SET_PROMISC_MODE_OFF;
4210         if (dev->flags & IFF_PROMISC)
4211                 mode = SET_PROMISC_MODE_ON;
4212         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4213
4214         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4215                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4216         if (!iob)
4217                 return;
4218         cmd = __ipa_cmd(iob);
4219         cmd->data.setadapterparms.data.mode = mode;
4220         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4221 }
4222 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4223
4224 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4225 {
4226         struct qeth_card *card;
4227
4228         card = dev->ml_priv;
4229
4230         QETH_CARD_TEXT(card, 5, "getstat");
4231
4232         return &card->stats;
4233 }
4234 EXPORT_SYMBOL_GPL(qeth_get_stats);
4235
4236 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4237                 struct qeth_reply *reply, unsigned long data)
4238 {
4239         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4240
4241         QETH_CARD_TEXT(card, 4, "chgmaccb");
4242         if (qeth_setadpparms_inspect_rc(cmd))
4243                 return 0;
4244
4245         if (!card->options.layer2 ||
4246             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4247                 ether_addr_copy(card->dev->dev_addr,
4248                                 cmd->data.setadapterparms.data.change_addr.addr);
4249                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4250         }
4251         return 0;
4252 }
4253
4254 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4255 {
4256         int rc;
4257         struct qeth_cmd_buffer *iob;
4258         struct qeth_ipa_cmd *cmd;
4259
4260         QETH_CARD_TEXT(card, 4, "chgmac");
4261
4262         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4263                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4264                                    sizeof(struct qeth_change_addr));
4265         if (!iob)
4266                 return -ENOMEM;
4267         cmd = __ipa_cmd(iob);
4268         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4269         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4270         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4271                         card->dev->dev_addr);
4272         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4273                                NULL);
4274         return rc;
4275 }
4276 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4277
4278 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4279                 struct qeth_reply *reply, unsigned long data)
4280 {
4281         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4282         struct qeth_set_access_ctrl *access_ctrl_req;
4283         int fallback = *(int *)reply->param;
4284
4285         QETH_CARD_TEXT(card, 4, "setaccb");
4286         if (cmd->hdr.return_code)
4287                 return 0;
4288         qeth_setadpparms_inspect_rc(cmd);
4289
4290         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4291         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4292         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4293         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4294                 cmd->data.setadapterparms.hdr.return_code);
4295         if (cmd->data.setadapterparms.hdr.return_code !=
4296                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4297                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4298                                 card->gdev->dev.kobj.name,
4299                                 access_ctrl_req->subcmd_code,
4300                                 cmd->data.setadapterparms.hdr.return_code);
4301         switch (cmd->data.setadapterparms.hdr.return_code) {
4302         case SET_ACCESS_CTRL_RC_SUCCESS:
4303                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4304                         dev_info(&card->gdev->dev,
4305                             "QDIO data connection isolation is deactivated\n");
4306                 } else {
4307                         dev_info(&card->gdev->dev,
4308                             "QDIO data connection isolation is activated\n");
4309                 }
4310                 break;
4311         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4312                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4313                                 "deactivated\n", dev_name(&card->gdev->dev));
4314                 if (fallback)
4315                         card->options.isolation = card->options.prev_isolation;
4316                 break;
4317         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4318                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4319                                 " activated\n", dev_name(&card->gdev->dev));
4320                 if (fallback)
4321                         card->options.isolation = card->options.prev_isolation;
4322                 break;
4323         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4324                 dev_err(&card->gdev->dev, "Adapter does not "
4325                         "support QDIO data connection isolation\n");
4326                 break;
4327         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4328                 dev_err(&card->gdev->dev,
4329                         "Adapter is dedicated. "
4330                         "QDIO data connection isolation not supported\n");
4331                 if (fallback)
4332                         card->options.isolation = card->options.prev_isolation;
4333                 break;
4334         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4335                 dev_err(&card->gdev->dev,
4336                         "TSO does not permit QDIO data connection isolation\n");
4337                 if (fallback)
4338                         card->options.isolation = card->options.prev_isolation;
4339                 break;
4340         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4341                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4342                         "support reflective relay mode\n");
4343                 if (fallback)
4344                         card->options.isolation = card->options.prev_isolation;
4345                 break;
4346         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4347                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4348                                         "enabled at the adjacent switch port");
4349                 if (fallback)
4350                         card->options.isolation = card->options.prev_isolation;
4351                 break;
4352         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4353                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4354                                         "at the adjacent switch failed\n");
4355                 break;
4356         default:
4357                 /* this should never happen */
4358                 if (fallback)
4359                         card->options.isolation = card->options.prev_isolation;
4360                 break;
4361         }
4362         return 0;
4363 }
4364
4365 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4366                 enum qeth_ipa_isolation_modes isolation, int fallback)
4367 {
4368         int rc;
4369         struct qeth_cmd_buffer *iob;
4370         struct qeth_ipa_cmd *cmd;
4371         struct qeth_set_access_ctrl *access_ctrl_req;
4372
4373         QETH_CARD_TEXT(card, 4, "setacctl");
4374
4375         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4376         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4377
4378         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4379                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4380                                    sizeof(struct qeth_set_access_ctrl));
4381         if (!iob)
4382                 return -ENOMEM;
4383         cmd = __ipa_cmd(iob);
4384         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4385         access_ctrl_req->subcmd_code = isolation;
4386
4387         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4388                                &fallback);
4389         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4390         return rc;
4391 }
4392
4393 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4394 {
4395         int rc = 0;
4396
4397         QETH_CARD_TEXT(card, 4, "setactlo");
4398
4399         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4400              card->info.type == QETH_CARD_TYPE_OSX) &&
4401              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4402                 rc = qeth_setadpparms_set_access_ctrl(card,
4403                         card->options.isolation, fallback);
4404                 if (rc) {
4405                         QETH_DBF_MESSAGE(3,
4406                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4407                                 card->gdev->dev.kobj.name,
4408                                 rc);
4409                         rc = -EOPNOTSUPP;
4410                 }
4411         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4412                 card->options.isolation = ISOLATION_MODE_NONE;
4413
4414                 dev_err(&card->gdev->dev, "Adapter does not "
4415                         "support QDIO data connection isolation\n");
4416                 rc = -EOPNOTSUPP;
4417         }
4418         return rc;
4419 }
4420 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4421
4422 void qeth_tx_timeout(struct net_device *dev)
4423 {
4424         struct qeth_card *card;
4425
4426         card = dev->ml_priv;
4427         QETH_CARD_TEXT(card, 4, "txtimeo");
4428         card->stats.tx_errors++;
4429         qeth_schedule_recovery(card);
4430 }
4431 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4432
4433 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4434 {
4435         struct qeth_card *card = dev->ml_priv;
4436         int rc = 0;
4437
4438         switch (regnum) {
4439         case MII_BMCR: /* Basic mode control register */
4440                 rc = BMCR_FULLDPLX;
4441                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4442                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4443                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4444                         rc |= BMCR_SPEED100;
4445                 break;
4446         case MII_BMSR: /* Basic mode status register */
4447                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4448                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4449                      BMSR_100BASE4;
4450                 break;
4451         case MII_PHYSID1: /* PHYS ID 1 */
4452                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4453                      dev->dev_addr[2];
4454                 rc = (rc >> 5) & 0xFFFF;
4455                 break;
4456         case MII_PHYSID2: /* PHYS ID 2 */
4457                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4458                 break;
4459         case MII_ADVERTISE: /* Advertisement control reg */
4460                 rc = ADVERTISE_ALL;
4461                 break;
4462         case MII_LPA: /* Link partner ability reg */
4463                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4464                      LPA_100BASE4 | LPA_LPACK;
4465                 break;
4466         case MII_EXPANSION: /* Expansion register */
4467                 break;
4468         case MII_DCOUNTER: /* disconnect counter */
4469                 break;
4470         case MII_FCSCOUNTER: /* false carrier counter */
4471                 break;
4472         case MII_NWAYTEST: /* N-way auto-neg test register */
4473                 break;
4474         case MII_RERRCOUNTER: /* rx error counter */
4475                 rc = card->stats.rx_errors;
4476                 break;
4477         case MII_SREVISION: /* silicon revision */
4478                 break;
4479         case MII_RESV1: /* reserved 1 */
4480                 break;
4481         case MII_LBRERROR: /* loopback, rx, bypass error */
4482                 break;
4483         case MII_PHYADDR: /* physical address */
4484                 break;
4485         case MII_RESV2: /* reserved 2 */
4486                 break;
4487         case MII_TPISTATUS: /* TPI status for 10mbps */
4488                 break;
4489         case MII_NCONFIG: /* network interface config */
4490                 break;
4491         default:
4492                 break;
4493         }
4494         return rc;
4495 }
4496
4497 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4498                 struct qeth_cmd_buffer *iob, int len,
4499                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4500                         unsigned long),
4501                 void *reply_param)
4502 {
4503         u16 s1, s2;
4504
4505         QETH_CARD_TEXT(card, 4, "sendsnmp");
4506
4507         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4508         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4509                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4510         /* adjust PDU length fields in IPA_PDU_HEADER */
4511         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4512         s2 = (u32) len;
4513         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4514         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4515         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4516         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4517         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4518                                       reply_cb, reply_param);
4519 }
4520
4521 static int qeth_snmp_command_cb(struct qeth_card *card,
4522                 struct qeth_reply *reply, unsigned long sdata)
4523 {
4524         struct qeth_ipa_cmd *cmd;
4525         struct qeth_arp_query_info *qinfo;
4526         struct qeth_snmp_cmd *snmp;
4527         unsigned char *data;
4528         __u16 data_len;
4529
4530         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4531
4532         cmd = (struct qeth_ipa_cmd *) sdata;
4533         data = (unsigned char *)((char *)cmd - reply->offset);
4534         qinfo = (struct qeth_arp_query_info *) reply->param;
4535         snmp = &cmd->data.setadapterparms.data.snmp;
4536
4537         if (cmd->hdr.return_code) {
4538                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4539                 return 0;
4540         }
4541         if (cmd->data.setadapterparms.hdr.return_code) {
4542                 cmd->hdr.return_code =
4543                         cmd->data.setadapterparms.hdr.return_code;
4544                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4545                 return 0;
4546         }
4547         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4548         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4549                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4550         else
4551                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4552
4553         /* check if there is enough room in userspace */
4554         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4555                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4556                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4557                 return 0;
4558         }
4559         QETH_CARD_TEXT_(card, 4, "snore%i",
4560                        cmd->data.setadapterparms.hdr.used_total);
4561         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4562                 cmd->data.setadapterparms.hdr.seq_no);
4563         /*copy entries to user buffer*/
4564         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4565                 memcpy(qinfo->udata + qinfo->udata_offset,
4566                        (char *)snmp,
4567                        data_len + offsetof(struct qeth_snmp_cmd, data));
4568                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4569         } else {
4570                 memcpy(qinfo->udata + qinfo->udata_offset,
4571                        (char *)&snmp->request, data_len);
4572         }
4573         qinfo->udata_offset += data_len;
4574         /* check if all replies received ... */
4575                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4576                                cmd->data.setadapterparms.hdr.used_total);
4577                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4578                                cmd->data.setadapterparms.hdr.seq_no);
4579         if (cmd->data.setadapterparms.hdr.seq_no <
4580             cmd->data.setadapterparms.hdr.used_total)
4581                 return 1;
4582         return 0;
4583 }
4584
4585 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4586 {
4587         struct qeth_cmd_buffer *iob;
4588         struct qeth_ipa_cmd *cmd;
4589         struct qeth_snmp_ureq *ureq;
4590         unsigned int req_len;
4591         struct qeth_arp_query_info qinfo = {0, };
4592         int rc = 0;
4593
4594         QETH_CARD_TEXT(card, 3, "snmpcmd");
4595
4596         if (card->info.guestlan)
4597                 return -EOPNOTSUPP;
4598
4599         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4600             (!card->options.layer2)) {
4601                 return -EOPNOTSUPP;
4602         }
4603         /* skip 4 bytes (data_len struct member) to get req_len */
4604         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4605                 return -EFAULT;
4606         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4607                        sizeof(struct qeth_ipacmd_hdr) -
4608                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4609                 return -EINVAL;
4610         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4611         if (IS_ERR(ureq)) {
4612                 QETH_CARD_TEXT(card, 2, "snmpnome");
4613                 return PTR_ERR(ureq);
4614         }
4615         qinfo.udata_len = ureq->hdr.data_len;
4616         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4617         if (!qinfo.udata) {
4618                 kfree(ureq);
4619                 return -ENOMEM;
4620         }
4621         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4622
4623         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4624                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4625         if (!iob) {
4626                 rc = -ENOMEM;
4627                 goto out;
4628         }
4629         cmd = __ipa_cmd(iob);
4630         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4631         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4632                                     qeth_snmp_command_cb, (void *)&qinfo);
4633         if (rc)
4634                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4635                            QETH_CARD_IFNAME(card), rc);
4636         else {
4637                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4638                         rc = -EFAULT;
4639         }
4640 out:
4641         kfree(ureq);
4642         kfree(qinfo.udata);
4643         return rc;
4644 }
4645
4646 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4647                 struct qeth_reply *reply, unsigned long data)
4648 {
4649         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4650         struct qeth_qoat_priv *priv;
4651         char *resdata;
4652         int resdatalen;
4653
4654         QETH_CARD_TEXT(card, 3, "qoatcb");
4655         if (qeth_setadpparms_inspect_rc(cmd))
4656                 return 0;
4657
4658         priv = (struct qeth_qoat_priv *)reply->param;
4659         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4660         resdata = (char *)data + 28;
4661
4662         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4663                 cmd->hdr.return_code = IPA_RC_FFFF;
4664                 return 0;
4665         }
4666
4667         memcpy((priv->buffer + priv->response_len), resdata,
4668                 resdatalen);
4669         priv->response_len += resdatalen;
4670
4671         if (cmd->data.setadapterparms.hdr.seq_no <
4672             cmd->data.setadapterparms.hdr.used_total)
4673                 return 1;
4674         return 0;
4675 }
4676
4677 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4678 {
4679         int rc = 0;
4680         struct qeth_cmd_buffer *iob;
4681         struct qeth_ipa_cmd *cmd;
4682         struct qeth_query_oat *oat_req;
4683         struct qeth_query_oat_data oat_data;
4684         struct qeth_qoat_priv priv;
4685         void __user *tmp;
4686
4687         QETH_CARD_TEXT(card, 3, "qoatcmd");
4688
4689         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4690                 rc = -EOPNOTSUPP;
4691                 goto out;
4692         }
4693
4694         if (copy_from_user(&oat_data, udata,
4695             sizeof(struct qeth_query_oat_data))) {
4696                         rc = -EFAULT;
4697                         goto out;
4698         }
4699
4700         priv.buffer_len = oat_data.buffer_len;
4701         priv.response_len = 0;
4702         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4703         if (!priv.buffer) {
4704                 rc = -ENOMEM;
4705                 goto out;
4706         }
4707
4708         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4709                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4710                                    sizeof(struct qeth_query_oat));
4711         if (!iob) {
4712                 rc = -ENOMEM;
4713                 goto out_free;
4714         }
4715         cmd = __ipa_cmd(iob);
4716         oat_req = &cmd->data.setadapterparms.data.query_oat;
4717         oat_req->subcmd_code = oat_data.command;
4718
4719         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4720                                &priv);
4721         if (!rc) {
4722                 if (is_compat_task())
4723                         tmp = compat_ptr(oat_data.ptr);
4724                 else
4725                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4726
4727                 if (copy_to_user(tmp, priv.buffer,
4728                     priv.response_len)) {
4729                         rc = -EFAULT;
4730                         goto out_free;
4731                 }
4732
4733                 oat_data.response_len = priv.response_len;
4734
4735                 if (copy_to_user(udata, &oat_data,
4736                     sizeof(struct qeth_query_oat_data)))
4737                         rc = -EFAULT;
4738         } else
4739                 if (rc == IPA_RC_FFFF)
4740                         rc = -EFAULT;
4741
4742 out_free:
4743         kfree(priv.buffer);
4744 out:
4745         return rc;
4746 }
4747
4748 static int qeth_query_card_info_cb(struct qeth_card *card,
4749                                    struct qeth_reply *reply, unsigned long data)
4750 {
4751         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4752         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4753         struct qeth_query_card_info *card_info;
4754
4755         QETH_CARD_TEXT(card, 2, "qcrdincb");
4756         if (qeth_setadpparms_inspect_rc(cmd))
4757                 return 0;
4758
4759         card_info = &cmd->data.setadapterparms.data.card_info;
4760         carrier_info->card_type = card_info->card_type;
4761         carrier_info->port_mode = card_info->port_mode;
4762         carrier_info->port_speed = card_info->port_speed;
4763         return 0;
4764 }
4765
4766 static int qeth_query_card_info(struct qeth_card *card,
4767                                 struct carrier_info *carrier_info)
4768 {
4769         struct qeth_cmd_buffer *iob;
4770
4771         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4772         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4773                 return -EOPNOTSUPP;
4774         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4775                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4776         if (!iob)
4777                 return -ENOMEM;
4778         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4779                                         (void *)carrier_info);
4780 }
4781
4782 /**
4783  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4784  * @card: pointer to a qeth_card
4785  *
4786  * Returns
4787  *      0, if a MAC address has been set for the card's netdevice
4788  *      a return code, for various error conditions
4789  */
4790 int qeth_vm_request_mac(struct qeth_card *card)
4791 {
4792         struct diag26c_mac_resp *response;
4793         struct diag26c_mac_req *request;
4794         struct ccw_dev_id id;
4795         int rc;
4796
4797         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4798
4799         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4800         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4801         if (!request || !response) {
4802                 rc = -ENOMEM;
4803                 goto out;
4804         }
4805
4806         ccw_device_get_id(CARD_DDEV(card), &id);
4807         request->resp_buf_len = sizeof(*response);
4808         request->resp_version = DIAG26C_VERSION2;
4809         request->op_code = DIAG26C_GET_MAC;
4810         request->devno = id.devno;
4811
4812         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4813         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4814         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4815         if (rc)
4816                 goto out;
4817         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4818
4819         if (request->resp_buf_len < sizeof(*response) ||
4820             response->version != request->resp_version) {
4821                 rc = -EIO;
4822                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4823                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4824                              sizeof(request->resp_buf_len));
4825         } else if (!is_valid_ether_addr(response->mac)) {
4826                 rc = -EINVAL;
4827                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4828                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4829         } else {
4830                 ether_addr_copy(card->dev->dev_addr, response->mac);
4831         }
4832
4833 out:
4834         kfree(response);
4835         kfree(request);
4836         return rc;
4837 }
4838 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4839
4840 static int qeth_get_qdio_q_format(struct qeth_card *card)
4841 {
4842         if (card->info.type == QETH_CARD_TYPE_IQD)
4843                 return QDIO_IQDIO_QFMT;
4844         else
4845                 return QDIO_QETH_QFMT;
4846 }
4847
4848 static void qeth_determine_capabilities(struct qeth_card *card)
4849 {
4850         int rc;
4851         int length;
4852         char *prcd;
4853         struct ccw_device *ddev;
4854         int ddev_offline = 0;
4855
4856         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4857         ddev = CARD_DDEV(card);
4858         if (!ddev->online) {
4859                 ddev_offline = 1;
4860                 rc = ccw_device_set_online(ddev);
4861                 if (rc) {
4862                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4863                         goto out;
4864                 }
4865         }
4866
4867         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4868         if (rc) {
4869                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4870                         dev_name(&card->gdev->dev), rc);
4871                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4872                 goto out_offline;
4873         }
4874         qeth_configure_unitaddr(card, prcd);
4875         if (ddev_offline)
4876                 qeth_configure_blkt_default(card, prcd);
4877         kfree(prcd);
4878
4879         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4880         if (rc)
4881                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4882
4883         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4884         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4885         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4886         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4887         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4888         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4889             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4890             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4891                 dev_info(&card->gdev->dev,
4892                         "Completion Queueing supported\n");
4893         } else {
4894                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4895         }
4896
4897
4898 out_offline:
4899         if (ddev_offline == 1)
4900                 ccw_device_set_offline(ddev);
4901 out:
4902         return;
4903 }
4904
4905 static void qeth_qdio_establish_cq(struct qeth_card *card,
4906                                    struct qdio_buffer **in_sbal_ptrs,
4907                                    void (**queue_start_poll)
4908                                         (struct ccw_device *, int,
4909                                          unsigned long))
4910 {
4911         int i;
4912
4913         if (card->options.cq == QETH_CQ_ENABLED) {
4914                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4915                              (card->qdio.no_in_queues - 1);
4916                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4917                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4918                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4919                 }
4920
4921                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4922         }
4923 }
4924
4925 static int qeth_qdio_establish(struct qeth_card *card)
4926 {
4927         struct qdio_initialize init_data;
4928         char *qib_param_field;
4929         struct qdio_buffer **in_sbal_ptrs;
4930         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4931         struct qdio_buffer **out_sbal_ptrs;
4932         int i, j, k;
4933         int rc = 0;
4934
4935         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4936
4937         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4938                                   GFP_KERNEL);
4939         if (!qib_param_field) {
4940                 rc =  -ENOMEM;
4941                 goto out_free_nothing;
4942         }
4943
4944         qeth_create_qib_param_field(card, qib_param_field);
4945         qeth_create_qib_param_field_blkt(card, qib_param_field);
4946
4947         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4948                                sizeof(void *),
4949                                GFP_KERNEL);
4950         if (!in_sbal_ptrs) {
4951                 rc = -ENOMEM;
4952                 goto out_free_qib_param;
4953         }
4954         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4955                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4956                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4957         }
4958
4959         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4960                                    GFP_KERNEL);
4961         if (!queue_start_poll) {
4962                 rc = -ENOMEM;
4963                 goto out_free_in_sbals;
4964         }
4965         for (i = 0; i < card->qdio.no_in_queues; ++i)
4966                 queue_start_poll[i] = qeth_qdio_start_poll;
4967
4968         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4969
4970         out_sbal_ptrs =
4971                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4972                         sizeof(void *),
4973                         GFP_KERNEL);
4974         if (!out_sbal_ptrs) {
4975                 rc = -ENOMEM;
4976                 goto out_free_queue_start_poll;
4977         }
4978         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4979                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4980                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4981                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4982                 }
4983
4984         memset(&init_data, 0, sizeof(struct qdio_initialize));
4985         init_data.cdev                   = CARD_DDEV(card);
4986         init_data.q_format               = qeth_get_qdio_q_format(card);
4987         init_data.qib_param_field_format = 0;
4988         init_data.qib_param_field        = qib_param_field;
4989         init_data.no_input_qs            = card->qdio.no_in_queues;
4990         init_data.no_output_qs           = card->qdio.no_out_queues;
4991         init_data.input_handler          = qeth_qdio_input_handler;
4992         init_data.output_handler         = qeth_qdio_output_handler;
4993         init_data.queue_start_poll_array = queue_start_poll;
4994         init_data.int_parm               = (unsigned long) card;
4995         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
4996         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
4997         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4998         init_data.scan_threshold =
4999                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5000
5001         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5002                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5003                 rc = qdio_allocate(&init_data);
5004                 if (rc) {
5005                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5006                         goto out;
5007                 }
5008                 rc = qdio_establish(&init_data);
5009                 if (rc) {
5010                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5011                         qdio_free(CARD_DDEV(card));
5012                 }
5013         }
5014
5015         switch (card->options.cq) {
5016         case QETH_CQ_ENABLED:
5017                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5018                 break;
5019         case QETH_CQ_DISABLED:
5020                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5021                 break;
5022         default:
5023                 break;
5024         }
5025 out:
5026         kfree(out_sbal_ptrs);
5027 out_free_queue_start_poll:
5028         kfree(queue_start_poll);
5029 out_free_in_sbals:
5030         kfree(in_sbal_ptrs);
5031 out_free_qib_param:
5032         kfree(qib_param_field);
5033 out_free_nothing:
5034         return rc;
5035 }
5036
5037 static void qeth_core_free_card(struct qeth_card *card)
5038 {
5039         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5040         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5041         qeth_clean_channel(&card->read);
5042         qeth_clean_channel(&card->write);
5043         qeth_clean_channel(&card->data);
5044         qeth_free_qdio_buffers(card);
5045         unregister_service_level(&card->qeth_service_level);
5046         kfree(card);
5047 }
5048
5049 void qeth_trace_features(struct qeth_card *card)
5050 {
5051         QETH_CARD_TEXT(card, 2, "features");
5052         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5053         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5054         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5055         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5056                       sizeof(card->info.diagass_support));
5057 }
5058 EXPORT_SYMBOL_GPL(qeth_trace_features);
5059
5060 static struct ccw_device_id qeth_ids[] = {
5061         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5062                                         .driver_info = QETH_CARD_TYPE_OSD},
5063         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5064                                         .driver_info = QETH_CARD_TYPE_IQD},
5065         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5066                                         .driver_info = QETH_CARD_TYPE_OSN},
5067         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5068                                         .driver_info = QETH_CARD_TYPE_OSM},
5069         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5070                                         .driver_info = QETH_CARD_TYPE_OSX},
5071         {},
5072 };
5073 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5074
5075 static struct ccw_driver qeth_ccw_driver = {
5076         .driver = {
5077                 .owner = THIS_MODULE,
5078                 .name = "qeth",
5079         },
5080         .ids = qeth_ids,
5081         .probe = ccwgroup_probe_ccwdev,
5082         .remove = ccwgroup_remove_ccwdev,
5083 };
5084
5085 int qeth_core_hardsetup_card(struct qeth_card *card)
5086 {
5087         int retries = 3;
5088         int rc;
5089
5090         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5091         atomic_set(&card->force_alloc_skb, 0);
5092         qeth_update_from_chp_desc(card);
5093 retry:
5094         if (retries < 3)
5095                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5096                         dev_name(&card->gdev->dev));
5097         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5098         ccw_device_set_offline(CARD_DDEV(card));
5099         ccw_device_set_offline(CARD_WDEV(card));
5100         ccw_device_set_offline(CARD_RDEV(card));
5101         qdio_free(CARD_DDEV(card));
5102         rc = ccw_device_set_online(CARD_RDEV(card));
5103         if (rc)
5104                 goto retriable;
5105         rc = ccw_device_set_online(CARD_WDEV(card));
5106         if (rc)
5107                 goto retriable;
5108         rc = ccw_device_set_online(CARD_DDEV(card));
5109         if (rc)
5110                 goto retriable;
5111 retriable:
5112         if (rc == -ERESTARTSYS) {
5113                 QETH_DBF_TEXT(SETUP, 2, "break1");
5114                 return rc;
5115         } else if (rc) {
5116                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5117                 if (--retries < 0)
5118                         goto out;
5119                 else
5120                         goto retry;
5121         }
5122         qeth_determine_capabilities(card);
5123         qeth_init_tokens(card);
5124         qeth_init_func_level(card);
5125         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5126         if (rc == -ERESTARTSYS) {
5127                 QETH_DBF_TEXT(SETUP, 2, "break2");
5128                 return rc;
5129         } else if (rc) {
5130                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5131                 if (--retries < 0)
5132                         goto out;
5133                 else
5134                         goto retry;
5135         }
5136         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5137         if (rc == -ERESTARTSYS) {
5138                 QETH_DBF_TEXT(SETUP, 2, "break3");
5139                 return rc;
5140         } else if (rc) {
5141                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5142                 if (--retries < 0)
5143                         goto out;
5144                 else
5145                         goto retry;
5146         }
5147         card->read_or_write_problem = 0;
5148         rc = qeth_mpc_initialize(card);
5149         if (rc) {
5150                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5151                 goto out;
5152         }
5153
5154         rc = qeth_send_startlan(card);
5155         if (rc) {
5156                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5157                 if (rc == IPA_RC_LAN_OFFLINE) {
5158                         dev_warn(&card->gdev->dev,
5159                                 "The LAN is offline\n");
5160                         card->lan_online = 0;
5161                 } else {
5162                         rc = -ENODEV;
5163                         goto out;
5164                 }
5165         } else
5166                 card->lan_online = 1;
5167
5168         card->options.ipa4.supported_funcs = 0;
5169         card->options.ipa6.supported_funcs = 0;
5170         card->options.adp.supported_funcs = 0;
5171         card->options.sbp.supported_funcs = 0;
5172         card->info.diagass_support = 0;
5173         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5174         if (rc == -ENOMEM)
5175                 goto out;
5176         if (qeth_is_supported(card, IPA_IPV6)) {
5177                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5178                 if (rc == -ENOMEM)
5179                         goto out;
5180         }
5181         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5182                 rc = qeth_query_setadapterparms(card);
5183                 if (rc < 0) {
5184                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5185                         goto out;
5186                 }
5187         }
5188         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5189                 rc = qeth_query_setdiagass(card);
5190                 if (rc < 0) {
5191                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5192                         goto out;
5193                 }
5194         }
5195         return 0;
5196 out:
5197         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5198                 "an error on the device\n");
5199         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5200                 dev_name(&card->gdev->dev), rc);
5201         return rc;
5202 }
5203 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5204
5205 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5206                                  struct sk_buff *skb, int offset, int data_len)
5207 {
5208         struct page *page = virt_to_page(element->addr);
5209         unsigned int next_frag;
5210
5211         /* first fill the linear space */
5212         if (!skb->len) {
5213                 unsigned int linear = min(data_len, skb_tailroom(skb));
5214
5215                 skb_put_data(skb, element->addr + offset, linear);
5216                 data_len -= linear;
5217                 if (!data_len)
5218                         return;
5219                 offset += linear;
5220                 /* fall through to add page frag for remaining data */
5221         }
5222
5223         next_frag = skb_shinfo(skb)->nr_frags;
5224         get_page(page);
5225         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5226 }
5227
5228 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5229 {
5230         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5231 }
5232
5233 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5234                 struct qeth_qdio_buffer *qethbuffer,
5235                 struct qdio_buffer_element **__element, int *__offset,
5236                 struct qeth_hdr **hdr)
5237 {
5238         struct qdio_buffer_element *element = *__element;
5239         struct qdio_buffer *buffer = qethbuffer->buffer;
5240         int offset = *__offset;
5241         struct sk_buff *skb;
5242         int skb_len = 0;
5243         void *data_ptr;
5244         int data_len;
5245         int headroom = 0;
5246         int use_rx_sg = 0;
5247
5248         /* qeth_hdr must not cross element boundaries */
5249         while (element->length < offset + sizeof(struct qeth_hdr)) {
5250                 if (qeth_is_last_sbale(element))
5251                         return NULL;
5252                 element++;
5253                 offset = 0;
5254         }
5255         *hdr = element->addr + offset;
5256
5257         offset += sizeof(struct qeth_hdr);
5258         switch ((*hdr)->hdr.l2.id) {
5259         case QETH_HEADER_TYPE_LAYER2:
5260                 skb_len = (*hdr)->hdr.l2.pkt_length;
5261                 break;
5262         case QETH_HEADER_TYPE_LAYER3:
5263                 skb_len = (*hdr)->hdr.l3.length;
5264                 headroom = ETH_HLEN;
5265                 break;
5266         case QETH_HEADER_TYPE_OSN:
5267                 skb_len = (*hdr)->hdr.osn.pdu_length;
5268                 headroom = sizeof(struct qeth_hdr);
5269                 break;
5270         default:
5271                 break;
5272         }
5273
5274         if (!skb_len)
5275                 return NULL;
5276
5277         if (((skb_len >= card->options.rx_sg_cb) &&
5278              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5279              (!atomic_read(&card->force_alloc_skb))) ||
5280             (card->options.cq == QETH_CQ_ENABLED))
5281                 use_rx_sg = 1;
5282
5283         if (use_rx_sg && qethbuffer->rx_skb) {
5284                 /* QETH_CQ_ENABLED only: */
5285                 skb = qethbuffer->rx_skb;
5286                 qethbuffer->rx_skb = NULL;
5287         } else {
5288                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5289
5290                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5291         }
5292         if (!skb)
5293                 goto no_mem;
5294         if (headroom)
5295                 skb_reserve(skb, headroom);
5296
5297         data_ptr = element->addr + offset;
5298         while (skb_len) {
5299                 data_len = min(skb_len, (int)(element->length - offset));
5300                 if (data_len) {
5301                         if (use_rx_sg)
5302                                 qeth_create_skb_frag(element, skb, offset,
5303                                                      data_len);
5304                         else
5305                                 skb_put_data(skb, data_ptr, data_len);
5306                 }
5307                 skb_len -= data_len;
5308                 if (skb_len) {
5309                         if (qeth_is_last_sbale(element)) {
5310                                 QETH_CARD_TEXT(card, 4, "unexeob");
5311                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5312                                 dev_kfree_skb_any(skb);
5313                                 card->stats.rx_errors++;
5314                                 return NULL;
5315                         }
5316                         element++;
5317                         offset = 0;
5318                         data_ptr = element->addr;
5319                 } else {
5320                         offset += data_len;
5321                 }
5322         }
5323         *__element = element;
5324         *__offset = offset;
5325         if (use_rx_sg && card->options.performance_stats) {
5326                 card->perf_stats.sg_skbs_rx++;
5327                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5328         }
5329         return skb;
5330 no_mem:
5331         if (net_ratelimit()) {
5332                 QETH_CARD_TEXT(card, 2, "noskbmem");
5333         }
5334         card->stats.rx_dropped++;
5335         return NULL;
5336 }
5337 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5338
5339 int qeth_poll(struct napi_struct *napi, int budget)
5340 {
5341         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5342         int work_done = 0;
5343         struct qeth_qdio_buffer *buffer;
5344         int done;
5345         int new_budget = budget;
5346
5347         if (card->options.performance_stats) {
5348                 card->perf_stats.inbound_cnt++;
5349                 card->perf_stats.inbound_start_time = qeth_get_micros();
5350         }
5351
5352         while (1) {
5353                 if (!card->rx.b_count) {
5354                         card->rx.qdio_err = 0;
5355                         card->rx.b_count = qdio_get_next_buffers(
5356                                 card->data.ccwdev, 0, &card->rx.b_index,
5357                                 &card->rx.qdio_err);
5358                         if (card->rx.b_count <= 0) {
5359                                 card->rx.b_count = 0;
5360                                 break;
5361                         }
5362                         card->rx.b_element =
5363                                 &card->qdio.in_q->bufs[card->rx.b_index]
5364                                 .buffer->element[0];
5365                         card->rx.e_offset = 0;
5366                 }
5367
5368                 while (card->rx.b_count) {
5369                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5370                         if (!(card->rx.qdio_err &&
5371                             qeth_check_qdio_errors(card, buffer->buffer,
5372                             card->rx.qdio_err, "qinerr")))
5373                                 work_done +=
5374                                         card->discipline->process_rx_buffer(
5375                                                 card, new_budget, &done);
5376                         else
5377                                 done = 1;
5378
5379                         if (done) {
5380                                 if (card->options.performance_stats)
5381                                         card->perf_stats.bufs_rec++;
5382                                 qeth_put_buffer_pool_entry(card,
5383                                         buffer->pool_entry);
5384                                 qeth_queue_input_buffer(card, card->rx.b_index);
5385                                 card->rx.b_count--;
5386                                 if (card->rx.b_count) {
5387                                         card->rx.b_index =
5388                                                 (card->rx.b_index + 1) %
5389                                                 QDIO_MAX_BUFFERS_PER_Q;
5390                                         card->rx.b_element =
5391                                                 &card->qdio.in_q
5392                                                 ->bufs[card->rx.b_index]
5393                                                 .buffer->element[0];
5394                                         card->rx.e_offset = 0;
5395                                 }
5396                         }
5397
5398                         if (work_done >= budget)
5399                                 goto out;
5400                         else
5401                                 new_budget = budget - work_done;
5402                 }
5403         }
5404
5405         napi_complete_done(napi, work_done);
5406         if (qdio_start_irq(card->data.ccwdev, 0))
5407                 napi_schedule(&card->napi);
5408 out:
5409         if (card->options.performance_stats)
5410                 card->perf_stats.inbound_time += qeth_get_micros() -
5411                         card->perf_stats.inbound_start_time;
5412         return work_done;
5413 }
5414 EXPORT_SYMBOL_GPL(qeth_poll);
5415
5416 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5417 {
5418         if (!cmd->hdr.return_code)
5419                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5420         return cmd->hdr.return_code;
5421 }
5422
5423 int qeth_setassparms_cb(struct qeth_card *card,
5424                         struct qeth_reply *reply, unsigned long data)
5425 {
5426         struct qeth_ipa_cmd *cmd;
5427
5428         QETH_CARD_TEXT(card, 4, "defadpcb");
5429
5430         cmd = (struct qeth_ipa_cmd *) data;
5431         if (cmd->hdr.return_code == 0) {
5432                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5433                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5434                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5435                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5436                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5437         }
5438         return 0;
5439 }
5440 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5441
5442 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5443                                                  enum qeth_ipa_funcs ipa_func,
5444                                                  __u16 cmd_code, __u16 len,
5445                                                  enum qeth_prot_versions prot)
5446 {
5447         struct qeth_cmd_buffer *iob;
5448         struct qeth_ipa_cmd *cmd;
5449
5450         QETH_CARD_TEXT(card, 4, "getasscm");
5451         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5452
5453         if (iob) {
5454                 cmd = __ipa_cmd(iob);
5455                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5456                 cmd->data.setassparms.hdr.length = 8 + len;
5457                 cmd->data.setassparms.hdr.command_code = cmd_code;
5458                 cmd->data.setassparms.hdr.return_code = 0;
5459                 cmd->data.setassparms.hdr.seq_no = 0;
5460         }
5461
5462         return iob;
5463 }
5464 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5465
5466 int qeth_send_setassparms(struct qeth_card *card,
5467                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5468                           int (*reply_cb)(struct qeth_card *,
5469                                           struct qeth_reply *, unsigned long),
5470                           void *reply_param)
5471 {
5472         int rc;
5473         struct qeth_ipa_cmd *cmd;
5474
5475         QETH_CARD_TEXT(card, 4, "sendassp");
5476
5477         cmd = __ipa_cmd(iob);
5478         if (len <= sizeof(__u32))
5479                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5480         else   /* (len > sizeof(__u32)) */
5481                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5482
5483         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5484         return rc;
5485 }
5486 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5487
5488 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5489                                       enum qeth_ipa_funcs ipa_func,
5490                                       u16 cmd_code, long data,
5491                                       enum qeth_prot_versions prot)
5492 {
5493         int rc;
5494         int length = 0;
5495         struct qeth_cmd_buffer *iob;
5496
5497         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5498         if (data)
5499                 length = sizeof(__u32);
5500         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5501         if (!iob)
5502                 return -ENOMEM;
5503         rc = qeth_send_setassparms(card, iob, length, data,
5504                                    qeth_setassparms_cb, NULL);
5505         return rc;
5506 }
5507 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5508
5509 static void qeth_unregister_dbf_views(void)
5510 {
5511         int x;
5512         for (x = 0; x < QETH_DBF_INFOS; x++) {
5513                 debug_unregister(qeth_dbf[x].id);
5514                 qeth_dbf[x].id = NULL;
5515         }
5516 }
5517
5518 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5519 {
5520         char dbf_txt_buf[32];
5521         va_list args;
5522
5523         if (!debug_level_enabled(id, level))
5524                 return;
5525         va_start(args, fmt);
5526         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5527         va_end(args);
5528         debug_text_event(id, level, dbf_txt_buf);
5529 }
5530 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5531
5532 static int qeth_register_dbf_views(void)
5533 {
5534         int ret;
5535         int x;
5536
5537         for (x = 0; x < QETH_DBF_INFOS; x++) {
5538                 /* register the areas */
5539                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5540                                                 qeth_dbf[x].pages,
5541                                                 qeth_dbf[x].areas,
5542                                                 qeth_dbf[x].len);
5543                 if (qeth_dbf[x].id == NULL) {
5544                         qeth_unregister_dbf_views();
5545                         return -ENOMEM;
5546                 }
5547
5548                 /* register a view */
5549                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5550                 if (ret) {
5551                         qeth_unregister_dbf_views();
5552                         return ret;
5553                 }
5554
5555                 /* set a passing level */
5556                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5557         }
5558
5559         return 0;
5560 }
5561
5562 int qeth_core_load_discipline(struct qeth_card *card,
5563                 enum qeth_discipline_id discipline)
5564 {
5565         int rc = 0;
5566
5567         mutex_lock(&qeth_mod_mutex);
5568         switch (discipline) {
5569         case QETH_DISCIPLINE_LAYER3:
5570                 card->discipline = try_then_request_module(
5571                         symbol_get(qeth_l3_discipline), "qeth_l3");
5572                 break;
5573         case QETH_DISCIPLINE_LAYER2:
5574                 card->discipline = try_then_request_module(
5575                         symbol_get(qeth_l2_discipline), "qeth_l2");
5576                 break;
5577         default:
5578                 break;
5579         }
5580
5581         if (!card->discipline) {
5582                 dev_err(&card->gdev->dev, "There is no kernel module to "
5583                         "support discipline %d\n", discipline);
5584                 rc = -EINVAL;
5585         }
5586         mutex_unlock(&qeth_mod_mutex);
5587         return rc;
5588 }
5589
5590 void qeth_core_free_discipline(struct qeth_card *card)
5591 {
5592         if (card->options.layer2)
5593                 symbol_put(qeth_l2_discipline);
5594         else
5595                 symbol_put(qeth_l3_discipline);
5596         card->discipline = NULL;
5597 }
5598
5599 const struct device_type qeth_generic_devtype = {
5600         .name = "qeth_generic",
5601         .groups = qeth_generic_attr_groups,
5602 };
5603 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5604
5605 static const struct device_type qeth_osn_devtype = {
5606         .name = "qeth_osn",
5607         .groups = qeth_osn_attr_groups,
5608 };
5609
5610 #define DBF_NAME_LEN    20
5611
5612 struct qeth_dbf_entry {
5613         char dbf_name[DBF_NAME_LEN];
5614         debug_info_t *dbf_info;
5615         struct list_head dbf_list;
5616 };
5617
5618 static LIST_HEAD(qeth_dbf_list);
5619 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5620
5621 static debug_info_t *qeth_get_dbf_entry(char *name)
5622 {
5623         struct qeth_dbf_entry *entry;
5624         debug_info_t *rc = NULL;
5625
5626         mutex_lock(&qeth_dbf_list_mutex);
5627         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5628                 if (strcmp(entry->dbf_name, name) == 0) {
5629                         rc = entry->dbf_info;
5630                         break;
5631                 }
5632         }
5633         mutex_unlock(&qeth_dbf_list_mutex);
5634         return rc;
5635 }
5636
5637 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5638 {
5639         struct qeth_dbf_entry *new_entry;
5640
5641         card->debug = debug_register(name, 2, 1, 8);
5642         if (!card->debug) {
5643                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5644                 goto err;
5645         }
5646         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5647                 goto err_dbg;
5648         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5649         if (!new_entry)
5650                 goto err_dbg;
5651         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5652         new_entry->dbf_info = card->debug;
5653         mutex_lock(&qeth_dbf_list_mutex);
5654         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5655         mutex_unlock(&qeth_dbf_list_mutex);
5656
5657         return 0;
5658
5659 err_dbg:
5660         debug_unregister(card->debug);
5661 err:
5662         return -ENOMEM;
5663 }
5664
5665 static void qeth_clear_dbf_list(void)
5666 {
5667         struct qeth_dbf_entry *entry, *tmp;
5668
5669         mutex_lock(&qeth_dbf_list_mutex);
5670         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5671                 list_del(&entry->dbf_list);
5672                 debug_unregister(entry->dbf_info);
5673                 kfree(entry);
5674         }
5675         mutex_unlock(&qeth_dbf_list_mutex);
5676 }
5677
5678 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5679 {
5680         struct net_device *dev;
5681
5682         switch (card->info.type) {
5683         case QETH_CARD_TYPE_IQD:
5684                 dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);
5685                 break;
5686         case QETH_CARD_TYPE_OSN:
5687                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5688                 break;
5689         default:
5690                 dev = alloc_etherdev(0);
5691         }
5692
5693         if (!dev)
5694                 return NULL;
5695
5696         dev->ml_priv = card;
5697         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5698         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5699          /* initialized when device first goes online: */
5700         dev->max_mtu = 0;
5701         dev->mtu = 0;
5702         SET_NETDEV_DEV(dev, &card->gdev->dev);
5703         netif_carrier_off(dev);
5704
5705         if (!IS_OSN(card)) {
5706                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5707                 dev->hw_features |= NETIF_F_SG;
5708                 dev->vlan_features |= NETIF_F_SG;
5709         }
5710
5711         return dev;
5712 }
5713
5714 struct net_device *qeth_clone_netdev(struct net_device *orig)
5715 {
5716         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5717
5718         if (!clone)
5719                 return NULL;
5720
5721         clone->dev_port = orig->dev_port;
5722         return clone;
5723 }
5724
5725 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5726 {
5727         struct qeth_card *card;
5728         struct device *dev;
5729         int rc;
5730         enum qeth_discipline_id enforced_disc;
5731         unsigned long flags;
5732         char dbf_name[DBF_NAME_LEN];
5733
5734         QETH_DBF_TEXT(SETUP, 2, "probedev");
5735
5736         dev = &gdev->dev;
5737         if (!get_device(dev))
5738                 return -ENODEV;
5739
5740         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5741
5742         card = qeth_alloc_card();
5743         if (!card) {
5744                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5745                 rc = -ENOMEM;
5746                 goto err_dev;
5747         }
5748
5749         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5750                 dev_name(&gdev->dev));
5751         card->debug = qeth_get_dbf_entry(dbf_name);
5752         if (!card->debug) {
5753                 rc = qeth_add_dbf_entry(card, dbf_name);
5754                 if (rc)
5755                         goto err_card;
5756         }
5757
5758         card->read.ccwdev  = gdev->cdev[0];
5759         card->write.ccwdev = gdev->cdev[1];
5760         card->data.ccwdev  = gdev->cdev[2];
5761         dev_set_drvdata(&gdev->dev, card);
5762         card->gdev = gdev;
5763         gdev->cdev[0]->handler = qeth_irq;
5764         gdev->cdev[1]->handler = qeth_irq;
5765         gdev->cdev[2]->handler = qeth_irq;
5766
5767         qeth_setup_card(card);
5768         qeth_update_from_chp_desc(card);
5769
5770         card->dev = qeth_alloc_netdev(card);
5771         if (!card->dev)
5772                 goto err_card;
5773
5774         qeth_determine_capabilities(card);
5775         enforced_disc = qeth_enforce_discipline(card);
5776         switch (enforced_disc) {
5777         case QETH_DISCIPLINE_UNDETERMINED:
5778                 gdev->dev.type = &qeth_generic_devtype;
5779                 break;
5780         default:
5781                 card->info.layer_enforced = true;
5782                 rc = qeth_core_load_discipline(card, enforced_disc);
5783                 if (rc)
5784                         goto err_load;
5785
5786                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5787                                         ? card->discipline->devtype
5788                                         : &qeth_osn_devtype;
5789                 rc = card->discipline->setup(card->gdev);
5790                 if (rc)
5791                         goto err_disc;
5792                 break;
5793         }
5794
5795         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5796         list_add_tail(&card->list, &qeth_core_card_list.list);
5797         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5798         return 0;
5799
5800 err_disc:
5801         qeth_core_free_discipline(card);
5802 err_load:
5803         free_netdev(card->dev);
5804 err_card:
5805         qeth_core_free_card(card);
5806 err_dev:
5807         put_device(dev);
5808         return rc;
5809 }
5810
5811 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5812 {
5813         unsigned long flags;
5814         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5815
5816         QETH_DBF_TEXT(SETUP, 2, "removedv");
5817
5818         if (card->discipline) {
5819                 card->discipline->remove(gdev);
5820                 qeth_core_free_discipline(card);
5821         }
5822
5823         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5824         list_del(&card->list);
5825         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5826         free_netdev(card->dev);
5827         qeth_core_free_card(card);
5828         dev_set_drvdata(&gdev->dev, NULL);
5829         put_device(&gdev->dev);
5830 }
5831
5832 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5833 {
5834         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5835         int rc = 0;
5836         enum qeth_discipline_id def_discipline;
5837
5838         if (!card->discipline) {
5839                 if (card->info.type == QETH_CARD_TYPE_IQD)
5840                         def_discipline = QETH_DISCIPLINE_LAYER3;
5841                 else
5842                         def_discipline = QETH_DISCIPLINE_LAYER2;
5843                 rc = qeth_core_load_discipline(card, def_discipline);
5844                 if (rc)
5845                         goto err;
5846                 rc = card->discipline->setup(card->gdev);
5847                 if (rc) {
5848                         qeth_core_free_discipline(card);
5849                         goto err;
5850                 }
5851         }
5852         rc = card->discipline->set_online(gdev);
5853 err:
5854         return rc;
5855 }
5856
5857 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5858 {
5859         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5860         return card->discipline->set_offline(gdev);
5861 }
5862
5863 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5864 {
5865         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5866         qeth_set_allowed_threads(card, 0, 1);
5867         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5868                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5869         qeth_qdio_clear_card(card, 0);
5870         qeth_clear_qdio_buffers(card);
5871         qdio_free(CARD_DDEV(card));
5872 }
5873
5874 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5875 {
5876         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5877         if (card->discipline && card->discipline->freeze)
5878                 return card->discipline->freeze(gdev);
5879         return 0;
5880 }
5881
5882 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5883 {
5884         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5885         if (card->discipline && card->discipline->thaw)
5886                 return card->discipline->thaw(gdev);
5887         return 0;
5888 }
5889
5890 static int qeth_core_restore(struct ccwgroup_device *gdev)
5891 {
5892         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5893         if (card->discipline && card->discipline->restore)
5894                 return card->discipline->restore(gdev);
5895         return 0;
5896 }
5897
5898 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5899                            size_t count)
5900 {
5901         int err;
5902
5903         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5904                                   buf);
5905
5906         return err ? err : count;
5907 }
5908 static DRIVER_ATTR_WO(group);
5909
5910 static struct attribute *qeth_drv_attrs[] = {
5911         &driver_attr_group.attr,
5912         NULL,
5913 };
5914 static struct attribute_group qeth_drv_attr_group = {
5915         .attrs = qeth_drv_attrs,
5916 };
5917 static const struct attribute_group *qeth_drv_attr_groups[] = {
5918         &qeth_drv_attr_group,
5919         NULL,
5920 };
5921
5922 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5923         .driver = {
5924                 .groups = qeth_drv_attr_groups,
5925                 .owner = THIS_MODULE,
5926                 .name = "qeth",
5927         },
5928         .ccw_driver = &qeth_ccw_driver,
5929         .setup = qeth_core_probe_device,
5930         .remove = qeth_core_remove_device,
5931         .set_online = qeth_core_set_online,
5932         .set_offline = qeth_core_set_offline,
5933         .shutdown = qeth_core_shutdown,
5934         .prepare = NULL,
5935         .complete = NULL,
5936         .freeze = qeth_core_freeze,
5937         .thaw = qeth_core_thaw,
5938         .restore = qeth_core_restore,
5939 };
5940
5941 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5942 {
5943         struct qeth_card *card = dev->ml_priv;
5944         struct mii_ioctl_data *mii_data;
5945         int rc = 0;
5946
5947         if (!card)
5948                 return -ENODEV;
5949
5950         if (!qeth_card_hw_is_reachable(card))
5951                 return -ENODEV;
5952
5953         if (card->info.type == QETH_CARD_TYPE_OSN)
5954                 return -EPERM;
5955
5956         switch (cmd) {
5957         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5958                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5959                 break;
5960         case SIOC_QETH_GET_CARD_TYPE:
5961                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5962                      card->info.type == QETH_CARD_TYPE_OSM ||
5963                      card->info.type == QETH_CARD_TYPE_OSX) &&
5964                     !card->info.guestlan)
5965                         return 1;
5966                 else
5967                         return 0;
5968         case SIOCGMIIPHY:
5969                 mii_data = if_mii(rq);
5970                 mii_data->phy_id = 0;
5971                 break;
5972         case SIOCGMIIREG:
5973                 mii_data = if_mii(rq);
5974                 if (mii_data->phy_id != 0)
5975                         rc = -EINVAL;
5976                 else
5977                         mii_data->val_out = qeth_mdio_read(dev,
5978                                 mii_data->phy_id, mii_data->reg_num);
5979                 break;
5980         case SIOC_QETH_QUERY_OAT:
5981                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5982                 break;
5983         default:
5984                 if (card->discipline->do_ioctl)
5985                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5986                 else
5987                         rc = -EOPNOTSUPP;
5988         }
5989         if (rc)
5990                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5991         return rc;
5992 }
5993 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5994
5995 static struct {
5996         const char str[ETH_GSTRING_LEN];
5997 } qeth_ethtool_stats_keys[] = {
5998 /*  0 */{"rx skbs"},
5999         {"rx buffers"},
6000         {"tx skbs"},
6001         {"tx buffers"},
6002         {"tx skbs no packing"},
6003         {"tx buffers no packing"},
6004         {"tx skbs packing"},
6005         {"tx buffers packing"},
6006         {"tx sg skbs"},
6007         {"tx buffer elements"},
6008 /* 10 */{"rx sg skbs"},
6009         {"rx sg frags"},
6010         {"rx sg page allocs"},
6011         {"tx large kbytes"},
6012         {"tx large count"},
6013         {"tx pk state ch n->p"},
6014         {"tx pk state ch p->n"},
6015         {"tx pk watermark low"},
6016         {"tx pk watermark high"},
6017         {"queue 0 buffer usage"},
6018 /* 20 */{"queue 1 buffer usage"},
6019         {"queue 2 buffer usage"},
6020         {"queue 3 buffer usage"},
6021         {"rx poll time"},
6022         {"rx poll count"},
6023         {"rx do_QDIO time"},
6024         {"rx do_QDIO count"},
6025         {"tx handler time"},
6026         {"tx handler count"},
6027         {"tx time"},
6028 /* 30 */{"tx count"},
6029         {"tx do_QDIO time"},
6030         {"tx do_QDIO count"},
6031         {"tx csum"},
6032         {"tx lin"},
6033         {"tx linfail"},
6034         {"cq handler count"},
6035         {"cq handler time"},
6036         {"rx csum"}
6037 };
6038
6039 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6040 {
6041         switch (stringset) {
6042         case ETH_SS_STATS:
6043                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6044         default:
6045                 return -EINVAL;
6046         }
6047 }
6048 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6049
6050 void qeth_core_get_ethtool_stats(struct net_device *dev,
6051                 struct ethtool_stats *stats, u64 *data)
6052 {
6053         struct qeth_card *card = dev->ml_priv;
6054         data[0] = card->stats.rx_packets -
6055                                 card->perf_stats.initial_rx_packets;
6056         data[1] = card->perf_stats.bufs_rec;
6057         data[2] = card->stats.tx_packets -
6058                                 card->perf_stats.initial_tx_packets;
6059         data[3] = card->perf_stats.bufs_sent;
6060         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6061                         - card->perf_stats.skbs_sent_pack;
6062         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6063         data[6] = card->perf_stats.skbs_sent_pack;
6064         data[7] = card->perf_stats.bufs_sent_pack;
6065         data[8] = card->perf_stats.sg_skbs_sent;
6066         data[9] = card->perf_stats.buf_elements_sent;
6067         data[10] = card->perf_stats.sg_skbs_rx;
6068         data[11] = card->perf_stats.sg_frags_rx;
6069         data[12] = card->perf_stats.sg_alloc_page_rx;
6070         data[13] = (card->perf_stats.large_send_bytes >> 10);
6071         data[14] = card->perf_stats.large_send_cnt;
6072         data[15] = card->perf_stats.sc_dp_p;
6073         data[16] = card->perf_stats.sc_p_dp;
6074         data[17] = QETH_LOW_WATERMARK_PACK;
6075         data[18] = QETH_HIGH_WATERMARK_PACK;
6076         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6077         data[20] = (card->qdio.no_out_queues > 1) ?
6078                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6079         data[21] = (card->qdio.no_out_queues > 2) ?
6080                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6081         data[22] = (card->qdio.no_out_queues > 3) ?
6082                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6083         data[23] = card->perf_stats.inbound_time;
6084         data[24] = card->perf_stats.inbound_cnt;
6085         data[25] = card->perf_stats.inbound_do_qdio_time;
6086         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6087         data[27] = card->perf_stats.outbound_handler_time;
6088         data[28] = card->perf_stats.outbound_handler_cnt;
6089         data[29] = card->perf_stats.outbound_time;
6090         data[30] = card->perf_stats.outbound_cnt;
6091         data[31] = card->perf_stats.outbound_do_qdio_time;
6092         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6093         data[33] = card->perf_stats.tx_csum;
6094         data[34] = card->perf_stats.tx_lin;
6095         data[35] = card->perf_stats.tx_linfail;
6096         data[36] = card->perf_stats.cq_cnt;
6097         data[37] = card->perf_stats.cq_time;
6098         data[38] = card->perf_stats.rx_csum;
6099 }
6100 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6101
6102 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6103 {
6104         switch (stringset) {
6105         case ETH_SS_STATS:
6106                 memcpy(data, &qeth_ethtool_stats_keys,
6107                         sizeof(qeth_ethtool_stats_keys));
6108                 break;
6109         default:
6110                 WARN_ON(1);
6111                 break;
6112         }
6113 }
6114 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6115
6116 void qeth_core_get_drvinfo(struct net_device *dev,
6117                 struct ethtool_drvinfo *info)
6118 {
6119         struct qeth_card *card = dev->ml_priv;
6120
6121         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
6122                 sizeof(info->driver));
6123         strlcpy(info->version, "1.0", sizeof(info->version));
6124         strlcpy(info->fw_version, card->info.mcl_level,
6125                 sizeof(info->fw_version));
6126         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6127                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6128 }
6129 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6130
6131 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6132 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6133 /* Always advertise and support all speeds up to specified, and only one     */
6134 /* specified port type.                                                      */
6135 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6136                                 int maxspeed, int porttype)
6137 {
6138         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6139         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6140         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6141
6142         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6143         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6144
6145         switch (porttype) {
6146         case PORT_TP:
6147                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6148                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6149                 break;
6150         case PORT_FIBRE:
6151                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6152                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6153                 break;
6154         default:
6155                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6156                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6157                 WARN_ON_ONCE(1);
6158         }
6159
6160         /* fallthrough from high to low, to select all legal speeds: */
6161         switch (maxspeed) {
6162         case SPEED_10000:
6163                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6164                                                      10000baseT_Full);
6165                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6166                                                      10000baseT_Full);
6167         case SPEED_1000:
6168                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6169                                                      1000baseT_Full);
6170                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6171                                                      1000baseT_Full);
6172                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6173                                                      1000baseT_Half);
6174                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6175                                                      1000baseT_Half);
6176         case SPEED_100:
6177                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6178                                                      100baseT_Full);
6179                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6180                                                      100baseT_Full);
6181                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6182                                                      100baseT_Half);
6183                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6184                                                      100baseT_Half);
6185         case SPEED_10:
6186                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6187                                                      10baseT_Full);
6188                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6189                                                      10baseT_Full);
6190                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6191                                                      10baseT_Half);
6192                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6193                                                      10baseT_Half);
6194                 /* end fallthrough */
6195                 break;
6196         default:
6197                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6198                                                      10baseT_Full);
6199                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6200                                                      10baseT_Full);
6201                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6202                                                      10baseT_Half);
6203                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6204                                                      10baseT_Half);
6205                 WARN_ON_ONCE(1);
6206         }
6207 }
6208
6209 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6210                 struct ethtool_link_ksettings *cmd)
6211 {
6212         struct qeth_card *card = netdev->ml_priv;
6213         enum qeth_link_types link_type;
6214         struct carrier_info carrier_info;
6215         int rc;
6216
6217         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6218                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6219         else
6220                 link_type = card->info.link_type;
6221
6222         cmd->base.duplex = DUPLEX_FULL;
6223         cmd->base.autoneg = AUTONEG_ENABLE;
6224         cmd->base.phy_address = 0;
6225         cmd->base.mdio_support = 0;
6226         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6227         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6228
6229         switch (link_type) {
6230         case QETH_LINK_TYPE_FAST_ETH:
6231         case QETH_LINK_TYPE_LANE_ETH100:
6232                 cmd->base.speed = SPEED_100;
6233                 cmd->base.port = PORT_TP;
6234                 break;
6235         case QETH_LINK_TYPE_GBIT_ETH:
6236         case QETH_LINK_TYPE_LANE_ETH1000:
6237                 cmd->base.speed = SPEED_1000;
6238                 cmd->base.port = PORT_FIBRE;
6239                 break;
6240         case QETH_LINK_TYPE_10GBIT_ETH:
6241                 cmd->base.speed = SPEED_10000;
6242                 cmd->base.port = PORT_FIBRE;
6243                 break;
6244         default:
6245                 cmd->base.speed = SPEED_10;
6246                 cmd->base.port = PORT_TP;
6247         }
6248         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6249
6250         /* Check if we can obtain more accurate information.     */
6251         /* If QUERY_CARD_INFO command is not supported or fails, */
6252         /* just return the heuristics that was filled above.     */
6253         if (!qeth_card_hw_is_reachable(card))
6254                 return -ENODEV;
6255         rc = qeth_query_card_info(card, &carrier_info);
6256         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6257                 return 0;
6258         if (rc) /* report error from the hardware operation */
6259                 return rc;
6260         /* on success, fill in the information got from the hardware */
6261
6262         netdev_dbg(netdev,
6263         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6264                         carrier_info.card_type,
6265                         carrier_info.port_mode,
6266                         carrier_info.port_speed);
6267
6268         /* Update attributes for which we've obtained more authoritative */
6269         /* information, leave the rest the way they where filled above.  */
6270         switch (carrier_info.card_type) {
6271         case CARD_INFO_TYPE_1G_COPPER_A:
6272         case CARD_INFO_TYPE_1G_COPPER_B:
6273                 cmd->base.port = PORT_TP;
6274                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6275                 break;
6276         case CARD_INFO_TYPE_1G_FIBRE_A:
6277         case CARD_INFO_TYPE_1G_FIBRE_B:
6278                 cmd->base.port = PORT_FIBRE;
6279                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6280                 break;
6281         case CARD_INFO_TYPE_10G_FIBRE_A:
6282         case CARD_INFO_TYPE_10G_FIBRE_B:
6283                 cmd->base.port = PORT_FIBRE;
6284                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6285                 break;
6286         }
6287
6288         switch (carrier_info.port_mode) {
6289         case CARD_INFO_PORTM_FULLDUPLEX:
6290                 cmd->base.duplex = DUPLEX_FULL;
6291                 break;
6292         case CARD_INFO_PORTM_HALFDUPLEX:
6293                 cmd->base.duplex = DUPLEX_HALF;
6294                 break;
6295         }
6296
6297         switch (carrier_info.port_speed) {
6298         case CARD_INFO_PORTS_10M:
6299                 cmd->base.speed = SPEED_10;
6300                 break;
6301         case CARD_INFO_PORTS_100M:
6302                 cmd->base.speed = SPEED_100;
6303                 break;
6304         case CARD_INFO_PORTS_1G:
6305                 cmd->base.speed = SPEED_1000;
6306                 break;
6307         case CARD_INFO_PORTS_10G:
6308                 cmd->base.speed = SPEED_10000;
6309                 break;
6310         }
6311
6312         return 0;
6313 }
6314 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6315
6316 /* Callback to handle checksum offload command reply from OSA card.
6317  * Verify that required features have been enabled on the card.
6318  * Return error in hdr->return_code as this value is checked by caller.
6319  *
6320  * Always returns zero to indicate no further messages from the OSA card.
6321  */
6322 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6323                                         struct qeth_reply *reply,
6324                                         unsigned long data)
6325 {
6326         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6327         struct qeth_checksum_cmd *chksum_cb =
6328                                 (struct qeth_checksum_cmd *)reply->param;
6329
6330         QETH_CARD_TEXT(card, 4, "chkdoccb");
6331         if (qeth_setassparms_inspect_rc(cmd))
6332                 return 0;
6333
6334         memset(chksum_cb, 0, sizeof(*chksum_cb));
6335         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6336                 chksum_cb->supported =
6337                                 cmd->data.setassparms.data.chksum.supported;
6338                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6339         }
6340         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6341                 chksum_cb->supported =
6342                                 cmd->data.setassparms.data.chksum.supported;
6343                 chksum_cb->enabled =
6344                                 cmd->data.setassparms.data.chksum.enabled;
6345                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6346                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6347         }
6348         return 0;
6349 }
6350
6351 /* Send command to OSA card and check results. */
6352 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6353                                      enum qeth_ipa_funcs ipa_func,
6354                                      __u16 cmd_code, long data,
6355                                      struct qeth_checksum_cmd *chksum_cb,
6356                                      enum qeth_prot_versions prot)
6357 {
6358         struct qeth_cmd_buffer *iob;
6359         int rc = -ENOMEM;
6360
6361         QETH_CARD_TEXT(card, 4, "chkdocmd");
6362         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6363                                        sizeof(__u32), prot);
6364         if (iob)
6365                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6366                                            qeth_ipa_checksum_run_cmd_cb,
6367                                            chksum_cb);
6368         return rc;
6369 }
6370
6371 static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
6372                                  enum qeth_prot_versions prot)
6373 {
6374         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6375         struct qeth_checksum_cmd chksum_cb;
6376         int rc;
6377
6378         if (prot == QETH_PROT_IPV4)
6379                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6380         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6381                                        &chksum_cb, prot);
6382         if (!rc) {
6383                 if ((required_features & chksum_cb.supported) !=
6384                     required_features)
6385                         rc = -EIO;
6386                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6387                          cstype == IPA_INBOUND_CHECKSUM)
6388                         dev_warn(&card->gdev->dev,
6389                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6390                                  QETH_CARD_IFNAME(card));
6391         }
6392         if (rc) {
6393                 qeth_send_simple_setassparms_prot(card, cstype,
6394                                                   IPA_CMD_ASS_STOP, 0, prot);
6395                 dev_warn(&card->gdev->dev,
6396                          "Starting HW IPv%d checksumming for %s failed, using SW checksumming\n",
6397                          prot, QETH_CARD_IFNAME(card));
6398                 return rc;
6399         }
6400         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6401                                        chksum_cb.supported, &chksum_cb,
6402                                        prot);
6403         if (!rc) {
6404                 if ((required_features & chksum_cb.enabled) !=
6405                     required_features)
6406                         rc = -EIO;
6407         }
6408         if (rc) {
6409                 qeth_send_simple_setassparms_prot(card, cstype,
6410                                                   IPA_CMD_ASS_STOP, 0, prot);
6411                 dev_warn(&card->gdev->dev,
6412                          "Enabling HW IPv%d checksumming for %s failed, using SW checksumming\n",
6413                          prot, QETH_CARD_IFNAME(card));
6414                 return rc;
6415         }
6416
6417         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6418                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6419         return 0;
6420 }
6421
6422 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6423                              enum qeth_prot_versions prot)
6424 {
6425         int rc = (on) ? qeth_send_checksum_on(card, cstype, prot)
6426                       : qeth_send_simple_setassparms_prot(card, cstype,
6427                                                           IPA_CMD_ASS_STOP, 0,
6428                                                           prot);
6429         return rc ? -EIO : 0;
6430 }
6431
6432 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6433 {
6434         int rc;
6435
6436         QETH_CARD_TEXT(card, 3, "sttso");
6437
6438         if (on) {
6439                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6440                                                   IPA_CMD_ASS_START, 0);
6441                 if (rc) {
6442                         dev_warn(&card->gdev->dev,
6443                                  "Starting outbound TCP segmentation offload for %s failed\n",
6444                                  QETH_CARD_IFNAME(card));
6445                         return -EIO;
6446                 }
6447                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6448         } else {
6449                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6450                                                   IPA_CMD_ASS_STOP, 0);
6451         }
6452         return rc;
6453 }
6454
6455 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6456 {
6457         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6458         int rc_ipv6;
6459
6460         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6461                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6462                                             QETH_PROT_IPV4);
6463         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6464                 /* no/one Offload Assist available, so the rc is trivial */
6465                 return rc_ipv4;
6466
6467         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6468                                     QETH_PROT_IPV6);
6469
6470         if (on)
6471                 /* enable: success if any Assist is active */
6472                 return (rc_ipv6) ? rc_ipv4 : 0;
6473
6474         /* disable: failure if any Assist is still active */
6475         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6476 }
6477
6478 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
6479                           NETIF_F_IPV6_CSUM)
6480 /**
6481  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6482  * @dev:        a net_device
6483  */
6484 void qeth_enable_hw_features(struct net_device *dev)
6485 {
6486         struct qeth_card *card = dev->ml_priv;
6487         netdev_features_t features;
6488
6489         rtnl_lock();
6490         features = dev->features;
6491         /* force-off any feature that needs an IPA sequence.
6492          * netdev_update_features() will restart them.
6493          */
6494         dev->features &= ~QETH_HW_FEATURES;
6495         netdev_update_features(dev);
6496         if (features != dev->features)
6497                 dev_warn(&card->gdev->dev,
6498                          "Device recovery failed to restore all offload features\n");
6499         rtnl_unlock();
6500 }
6501 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6502
6503 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6504 {
6505         struct qeth_card *card = dev->ml_priv;
6506         netdev_features_t changed = dev->features ^ features;
6507         int rc = 0;
6508
6509         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6510         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6511
6512         if ((changed & NETIF_F_IP_CSUM)) {
6513                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6514                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6515                 if (rc)
6516                         changed ^= NETIF_F_IP_CSUM;
6517         }
6518         if (changed & NETIF_F_IPV6_CSUM) {
6519                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6520                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6521                 if (rc)
6522                         changed ^= NETIF_F_IPV6_CSUM;
6523         }
6524         if (changed & NETIF_F_RXCSUM) {
6525                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6526                 if (rc)
6527                         changed ^= NETIF_F_RXCSUM;
6528         }
6529         if ((changed & NETIF_F_TSO)) {
6530                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6531                 if (rc)
6532                         changed ^= NETIF_F_TSO;
6533         }
6534
6535         /* everything changed successfully? */
6536         if ((dev->features ^ features) == changed)
6537                 return 0;
6538         /* something went wrong. save changed features and return error */
6539         dev->features ^= changed;
6540         return -EIO;
6541 }
6542 EXPORT_SYMBOL_GPL(qeth_set_features);
6543
6544 netdev_features_t qeth_fix_features(struct net_device *dev,
6545                                     netdev_features_t features)
6546 {
6547         struct qeth_card *card = dev->ml_priv;
6548
6549         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6550         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6551                 features &= ~NETIF_F_IP_CSUM;
6552         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6553                 features &= ~NETIF_F_IPV6_CSUM;
6554         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6555             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6556                 features &= ~NETIF_F_RXCSUM;
6557         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6558                 features &= ~NETIF_F_TSO;
6559         /* if the card isn't up, remove features that require hw changes */
6560         if (card->state == CARD_STATE_DOWN ||
6561             card->state == CARD_STATE_RECOVER)
6562                 features &= ~QETH_HW_FEATURES;
6563         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6564         return features;
6565 }
6566 EXPORT_SYMBOL_GPL(qeth_fix_features);
6567
6568 netdev_features_t qeth_features_check(struct sk_buff *skb,
6569                                       struct net_device *dev,
6570                                       netdev_features_t features)
6571 {
6572         /* GSO segmentation builds skbs with
6573          *      a (small) linear part for the headers, and
6574          *      page frags for the data.
6575          * Compared to a linear skb, the header-only part consumes an
6576          * additional buffer element. This reduces buffer utilization, and
6577          * hurts throughput. So compress small segments into one element.
6578          */
6579         if (netif_needs_gso(skb, features)) {
6580                 /* match skb_segment(): */
6581                 unsigned int doffset = skb->data - skb_mac_header(skb);
6582                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6583                 unsigned int hroom = skb_headroom(skb);
6584
6585                 /* linearize only if resulting skb allocations are order-0: */
6586                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6587                         features &= ~NETIF_F_SG;
6588         }
6589
6590         return vlan_features_check(skb, features);
6591 }
6592 EXPORT_SYMBOL_GPL(qeth_features_check);
6593
6594 static int __init qeth_core_init(void)
6595 {
6596         int rc;
6597
6598         pr_info("loading core functions\n");
6599         INIT_LIST_HEAD(&qeth_core_card_list.list);
6600         INIT_LIST_HEAD(&qeth_dbf_list);
6601         rwlock_init(&qeth_core_card_list.rwlock);
6602         mutex_init(&qeth_mod_mutex);
6603
6604         qeth_wq = create_singlethread_workqueue("qeth_wq");
6605         if (!qeth_wq) {
6606                 rc = -ENOMEM;
6607                 goto out_err;
6608         }
6609
6610         rc = qeth_register_dbf_views();
6611         if (rc)
6612                 goto dbf_err;
6613         qeth_core_root_dev = root_device_register("qeth");
6614         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6615         if (rc)
6616                 goto register_err;
6617         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6618                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6619         if (!qeth_core_header_cache) {
6620                 rc = -ENOMEM;
6621                 goto slab_err;
6622         }
6623         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6624                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6625         if (!qeth_qdio_outbuf_cache) {
6626                 rc = -ENOMEM;
6627                 goto cqslab_err;
6628         }
6629         rc = ccw_driver_register(&qeth_ccw_driver);
6630         if (rc)
6631                 goto ccw_err;
6632         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6633         if (rc)
6634                 goto ccwgroup_err;
6635
6636         return 0;
6637
6638 ccwgroup_err:
6639         ccw_driver_unregister(&qeth_ccw_driver);
6640 ccw_err:
6641         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6642 cqslab_err:
6643         kmem_cache_destroy(qeth_core_header_cache);
6644 slab_err:
6645         root_device_unregister(qeth_core_root_dev);
6646 register_err:
6647         qeth_unregister_dbf_views();
6648 dbf_err:
6649         destroy_workqueue(qeth_wq);
6650 out_err:
6651         pr_err("Initializing the qeth device driver failed\n");
6652         return rc;
6653 }
6654
6655 static void __exit qeth_core_exit(void)
6656 {
6657         qeth_clear_dbf_list();
6658         destroy_workqueue(qeth_wq);
6659         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6660         ccw_driver_unregister(&qeth_ccw_driver);
6661         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6662         kmem_cache_destroy(qeth_core_header_cache);
6663         root_device_unregister(qeth_core_root_dev);
6664         qeth_unregister_dbf_views();
6665         pr_info("core functions removed\n");
6666 }
6667
6668 module_init(qeth_core_init);
6669 module_exit(qeth_core_exit);
6670 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6671 MODULE_DESCRIPTION("qeth core functions");
6672 MODULE_LICENSE("GPL");