drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/kernel.h>
  18 #include <linux/ip.h>
  19 #include <linux/tcp.h>
  20 #include <linux/mii.h>
  21 #include <linux/kthread.h>
  22 #include <linux/slab.h>
  23 #include <linux/if_vlan.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/netdev_features.h>
  26 #include <linux/skbuff.h>
  27
  28 #include <net/iucv/af_iucv.h>
  29 #include <net/dsfield.h>
  30
  31 #include <asm/ebcdic.h>
  32 #include <asm/chpid.h>
  33 #include <asm/io.h>
  34 #include <asm/sysinfo.h>
  35 #include <asm/compat.h>
  36 #include <asm/diag.h>
  37 #include <asm/cio.h>
  38 #include <asm/ccwdev.h>
  39 #include <asm/cpcmd.h>
  40
  41 #include "qeth_core.h"
  42
  43 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  44         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  45         /*                   N  P  A    M  L  V                      H  */
  46         [QETH_DBF_SETUP] = {"qeth_setup",
  47                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  48         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  49                             &debug_sprintf_view, NULL},
  50         [QETH_DBF_CTRL]  = {"qeth_control",
  51                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  52 };
  53 EXPORT_SYMBOL_GPL(qeth_dbf);
  54
  55 struct qeth_card_list_struct qeth_core_card_list;
  56 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  57 struct kmem_cache *qeth_core_header_cache;
  58 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  59 static struct kmem_cache *qeth_qdio_outbuf_cache;
  60
  61 static struct device *qeth_core_root_dev;
  62 static struct lock_class_key qdio_out_skb_queue_key;
  63 static struct mutex qeth_mod_mutex;
  64
  65 static void qeth_send_control_data_cb(struct qeth_channel *,
  66                         struct qeth_cmd_buffer *);
  67 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  68 static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
  69 static void qeth_free_buffer_pool(struct qeth_card *);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_buffers(struct qeth_card *);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  76 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
  77                 struct qeth_qdio_out_buffer *buf,
  78                 enum qeth_qdio_buffer_states newbufstate);
  79 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  80
  81 struct workqueue_struct *qeth_wq;
  82 EXPORT_SYMBOL_GPL(qeth_wq);
  83
  84 int qeth_card_hw_is_reachable(struct qeth_card *card)
  85 {
  86         return (card->state == CARD_STATE_SOFTSETUP) ||
  87                 (card->state == CARD_STATE_UP);
  88 }
  89 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  90
  91 static void qeth_close_dev_handler(struct work_struct *work)
  92 {
  93         struct qeth_card *card;
  94
  95         card = container_of(work, struct qeth_card, close_dev_work);
  96         QETH_CARD_TEXT(card, 2, "cldevhdl");
  97         rtnl_lock();
  98         dev_close(card->dev);
  99         rtnl_unlock();
 100         ccwgroup_set_offline(card->gdev);
 101 }
 102
 103 void qeth_close_dev(struct qeth_card *card)
 104 {
 105         QETH_CARD_TEXT(card, 2, "cldevsubm");
 106         queue_work(qeth_wq, &card->close_dev_work);
 107 }
 108 EXPORT_SYMBOL_GPL(qeth_close_dev);
 109
 110 static const char *qeth_get_cardname(struct qeth_card *card)
 111 {
 112         if (card->info.guestlan) {
 113                 switch (card->info.type) {
 114                 case QETH_CARD_TYPE_OSD:
 115                         return " Virtual NIC QDIO";
 116                 case QETH_CARD_TYPE_IQD:
 117                         return " Virtual NIC Hiper";
 118                 case QETH_CARD_TYPE_OSM:
 119                         return " Virtual NIC QDIO - OSM";
 120                 case QETH_CARD_TYPE_OSX:
 121                         return " Virtual NIC QDIO - OSX";
 122                 default:
 123                         return " unknown";
 124                 }
 125         } else {
 126                 switch (card->info.type) {
 127                 case QETH_CARD_TYPE_OSD:
 128                         return " OSD Express";
 129                 case QETH_CARD_TYPE_IQD:
 130                         return " HiperSockets";
 131                 case QETH_CARD_TYPE_OSN:
 132                         return " OSN QDIO";
 133                 case QETH_CARD_TYPE_OSM:
 134                         return " OSM QDIO";
 135                 case QETH_CARD_TYPE_OSX:
 136                         return " OSX QDIO";
 137                 default:
 138                         return " unknown";
 139                 }
 140         }
 141         return " n/a";
 142 }
 143
 144 /* max length to be returned: 14 */
 145 const char *qeth_get_cardname_short(struct qeth_card *card)
 146 {
 147         if (card->info.guestlan) {
 148                 switch (card->info.type) {
 149                 case QETH_CARD_TYPE_OSD:
 150                         return "Virt.NIC QDIO";
 151                 case QETH_CARD_TYPE_IQD:
 152                         return "Virt.NIC Hiper";
 153                 case QETH_CARD_TYPE_OSM:
 154                         return "Virt.NIC OSM";
 155                 case QETH_CARD_TYPE_OSX:
 156                         return "Virt.NIC OSX";
 157                 default:
 158                         return "unknown";
 159                 }
 160         } else {
 161                 switch (card->info.type) {
 162                 case QETH_CARD_TYPE_OSD:
 163                         switch (card->info.link_type) {
 164                         case QETH_LINK_TYPE_FAST_ETH:
 165                                 return "OSD_100";
 166                         case QETH_LINK_TYPE_HSTR:
 167                                 return "HSTR";
 168                         case QETH_LINK_TYPE_GBIT_ETH:
 169                                 return "OSD_1000";
 170                         case QETH_LINK_TYPE_10GBIT_ETH:
 171                                 return "OSD_10GIG";
 172                         case QETH_LINK_TYPE_LANE_ETH100:
 173                                 return "OSD_FE_LANE";
 174                         case QETH_LINK_TYPE_LANE_TR:
 175                                 return "OSD_TR_LANE";
 176                         case QETH_LINK_TYPE_LANE_ETH1000:
 177                                 return "OSD_GbE_LANE";
 178                         case QETH_LINK_TYPE_LANE:
 179                                 return "OSD_ATM_LANE";
 180                         default:
 181                                 return "OSD_Express";
 182                         }
 183                 case QETH_CARD_TYPE_IQD:
 184                         return "HiperSockets";
 185                 case QETH_CARD_TYPE_OSN:
 186                         return "OSN";
 187                 case QETH_CARD_TYPE_OSM:
 188                         return "OSM_1000";
 189                 case QETH_CARD_TYPE_OSX:
 190                         return "OSX_10GIG";
 191                 default:
 192                         return "unknown";
 193                 }
 194         }
 195         return "n/a";
 196 }
 197
 198 void qeth_set_recovery_task(struct qeth_card *card)
 199 {
 200         card->recovery_task = current;
 201 }
 202 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 203
 204 void qeth_clear_recovery_task(struct qeth_card *card)
 205 {
 206         card->recovery_task = NULL;
 207 }
 208 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 209
 210 static bool qeth_is_recovery_task(const struct qeth_card *card)
 211 {
 212         return card->recovery_task == current;
 213 }
 214
 215 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 216                          int clear_start_mask)
 217 {
 218         unsigned long flags;
 219
 220         spin_lock_irqsave(&card->thread_mask_lock, flags);
 221         card->thread_allowed_mask = threads;
 222         if (clear_start_mask)
 223                 card->thread_start_mask &= threads;
 224         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 225         wake_up(&card->wait_q);
 226 }
 227 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 228
 229 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 230 {
 231         unsigned long flags;
 232         int rc = 0;
 233
 234         spin_lock_irqsave(&card->thread_mask_lock, flags);
 235         rc = (card->thread_running_mask & threads);
 236         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 237         return rc;
 238 }
 239 EXPORT_SYMBOL_GPL(qeth_threads_running);
 240
 241 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 242 {
 243         if (qeth_is_recovery_task(card))
 244                 return 0;
 245         return wait_event_interruptible(card->wait_q,
 246                         qeth_threads_running(card, threads) == 0);
 247 }
 248 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 249
 250 void qeth_clear_working_pool_list(struct qeth_card *card)
 251 {
 252         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 253
 254         QETH_CARD_TEXT(card, 5, "clwrklst");
 255         list_for_each_entry_safe(pool_entry, tmp,
 256                             &card->qdio.in_buf_pool.entry_list, list){
 257                         list_del(&pool_entry->list);
 258         }
 259 }
 260 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 261
 262 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 263 {
 264         struct qeth_buffer_pool_entry *pool_entry;
 265         void *ptr;
 266         int i, j;
 267
 268         QETH_CARD_TEXT(card, 5, "alocpool");
 269         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 270                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 271                 if (!pool_entry) {
 272                         qeth_free_buffer_pool(card);
 273                         return -ENOMEM;
 274                 }
 275                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 276                         ptr = (void *) __get_free_page(GFP_KERNEL);
 277                         if (!ptr) {
 278                                 while (j > 0)
 279                                         free_page((unsigned long)
 280                                                   pool_entry->elements[--j]);
 281                                 kfree(pool_entry);
 282                                 qeth_free_buffer_pool(card);
 283                                 return -ENOMEM;
 284                         }
 285                         pool_entry->elements[j] = ptr;
 286                 }
 287                 list_add(&pool_entry->init_list,
 288                          &card->qdio.init_pool.entry_list);
 289         }
 290         return 0;
 291 }
 292
 293 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 294 {
 295         QETH_CARD_TEXT(card, 2, "realcbp");
 296
 297         if ((card->state != CARD_STATE_DOWN) &&
 298             (card->state != CARD_STATE_RECOVER))
 299                 return -EPERM;
 300
 301         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 302         qeth_clear_working_pool_list(card);
 303         qeth_free_buffer_pool(card);
 304         card->qdio.in_buf_pool.buf_count = bufcnt;
 305         card->qdio.init_pool.buf_count = bufcnt;
 306         return qeth_alloc_buffer_pool(card);
 307 }
 308 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 309
 310 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 311 {
 312         if (!q)
 313                 return;
 314
 315         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 316         kfree(q);
 317 }
 318
 319 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 320 {
 321         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 322         int i;
 323
 324         if (!q)
 325                 return NULL;
 326
 327         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 328                 kfree(q);
 329                 return NULL;
 330         }
 331
 332         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 333                 q->bufs[i].buffer = q->qdio_bufs[i];
 334
 335         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 336         return q;
 337 }
 338
 339 static int qeth_cq_init(struct qeth_card *card)
 340 {
 341         int rc;
 342
 343         if (card->options.cq == QETH_CQ_ENABLED) {
 344                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 345                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 346                                    QDIO_MAX_BUFFERS_PER_Q);
 347                 card->qdio.c_q->next_buf_to_init = 127;
 348                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 349                              card->qdio.no_in_queues - 1, 0,
 350                              127);
 351                 if (rc) {
 352                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 353                         goto out;
 354                 }
 355         }
 356         rc = 0;
 357 out:
 358         return rc;
 359 }
 360
 361 static int qeth_alloc_cq(struct qeth_card *card)
 362 {
 363         int rc;
 364
 365         if (card->options.cq == QETH_CQ_ENABLED) {
 366                 int i;
 367                 struct qdio_outbuf_state *outbuf_states;
 368
 369                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 370                 card->qdio.c_q = qeth_alloc_qdio_queue();
 371                 if (!card->qdio.c_q) {
 372                         rc = -1;
 373                         goto kmsg_out;
 374                 }
 375                 card->qdio.no_in_queues = 2;
 376                 card->qdio.out_bufstates =
 377                         kzalloc(card->qdio.no_out_queues *
 378                                 QDIO_MAX_BUFFERS_PER_Q *
 379                                 sizeof(struct qdio_outbuf_state), GFP_KERNEL);
 380                 outbuf_states = card->qdio.out_bufstates;
 381                 if (outbuf_states == NULL) {
 382                         rc = -1;
 383                         goto free_cq_out;
 384                 }
 385                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 386                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 387                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 388                 }
 389         } else {
 390                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 391                 card->qdio.c_q = NULL;
 392                 card->qdio.no_in_queues = 1;
 393         }
 394         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 395         rc = 0;
 396 out:
 397         return rc;
 398 free_cq_out:
 399         qeth_free_qdio_queue(card->qdio.c_q);
 400         card->qdio.c_q = NULL;
 401 kmsg_out:
 402         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 403         goto out;
 404 }
 405
 406 static void qeth_free_cq(struct qeth_card *card)
 407 {
 408         if (card->qdio.c_q) {
 409                 --card->qdio.no_in_queues;
 410                 qeth_free_qdio_queue(card->qdio.c_q);
 411                 card->qdio.c_q = NULL;
 412         }
 413         kfree(card->qdio.out_bufstates);
 414         card->qdio.out_bufstates = NULL;
 415 }
 416
 417 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 418                                                         int delayed)
 419 {
 420         enum iucv_tx_notify n;
 421
 422         switch (sbalf15) {
 423         case 0:
 424                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 425                 break;
 426         case 4:
 427         case 16:
 428         case 17:
 429         case 18:
 430                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 431                         TX_NOTIFY_UNREACHABLE;
 432                 break;
 433         default:
 434                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 435                         TX_NOTIFY_GENERALERROR;
 436                 break;
 437         }
 438
 439         return n;
 440 }
 441
 442 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 443                                          int forced_cleanup)
 444 {
 445         if (q->card->options.cq != QETH_CQ_ENABLED)
 446                 return;
 447
 448         if (q->bufs[bidx]->next_pending != NULL) {
 449                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 450                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 451
 452                 while (c) {
 453                         if (forced_cleanup ||
 454                             atomic_read(&c->state) ==
 455                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 456                                 struct qeth_qdio_out_buffer *f = c;
 457                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 458                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 459                                 /* release here to avoid interleaving between
 460                                    outbound tasklet and inbound tasklet
 461                                    regarding notifications and lifecycle */
 462                                 qeth_release_skbs(c);
 463
 464                                 c = f->next_pending;
 465                                 WARN_ON_ONCE(head->next_pending != f);
 466                                 head->next_pending = c;
 467                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 468                         } else {
 469                                 head = c;
 470                                 c = c->next_pending;
 471                         }
 472
 473                 }
 474         }
 475         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 476                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 477                 /* for recovery situations */
 478                 q->bufs[bidx]->aob = q->bufstates[bidx].aob;
 479                 qeth_init_qdio_out_buf(q, bidx);
 480                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 481         }
 482 }
 483
 484
 485 static void qeth_qdio_handle_aob(struct qeth_card *card,
 486                                  unsigned long phys_aob_addr)
 487 {
 488         struct qaob *aob;
 489         struct qeth_qdio_out_buffer *buffer;
 490         enum iucv_tx_notify notification;
 491
 492         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 493         QETH_CARD_TEXT(card, 5, "haob");
 494         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 495         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 496         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 497
 498         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 499                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 500                 notification = TX_NOTIFY_OK;
 501         } else {
 502                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 503                                                         QETH_QDIO_BUF_PENDING);
 504                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 505                 notification = TX_NOTIFY_DELAYED_OK;
 506         }
 507
 508         if (aob->aorc != 0)  {
 509                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 510                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 511         }
 512         qeth_notify_skbs(buffer->q, buffer, notification);
 513
 514         buffer->aob = NULL;
 515         qeth_clear_output_buffer(buffer->q, buffer,
 516                                  QETH_QDIO_BUF_HANDLED_DELAYED);
 517
 518         /* from here on: do not touch buffer anymore */
 519         qdio_release_aob(aob);
 520 }
 521
 522 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 523 {
 524         return card->options.cq == QETH_CQ_ENABLED &&
 525             card->qdio.c_q != NULL &&
 526             queue != 0 &&
 527             queue == card->qdio.no_in_queues - 1;
 528 }
 529
 530 static int __qeth_issue_next_read(struct qeth_card *card)
 531 {
 532         int rc;
 533         struct qeth_cmd_buffer *iob;
 534
 535         QETH_CARD_TEXT(card, 5, "issnxrd");
 536         if (card->read.state != CH_STATE_UP)
 537                 return -EIO;
 538         iob = qeth_get_buffer(&card->read);
 539         if (!iob) {
 540                 dev_warn(&card->gdev->dev, "The qeth device driver "
 541                         "failed to recover an error on the device\n");
 542                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 543                         "available\n", dev_name(&card->gdev->dev));
 544                 return -ENOMEM;
 545         }
 546         qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
 547         QETH_CARD_TEXT(card, 6, "noirqpnd");
 548         rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
 549                               (addr_t) iob, 0, 0);
 550         if (rc) {
 551                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 552                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 553                 atomic_set(&card->read.irq_pending, 0);
 554                 card->read_or_write_problem = 1;
 555                 qeth_schedule_recovery(card);
 556                 wake_up(&card->wait_q);
 557         }
 558         return rc;
 559 }
 560
 561 static int qeth_issue_next_read(struct qeth_card *card)
 562 {
 563         int ret;
 564
 565         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 566         ret = __qeth_issue_next_read(card);
 567         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 568
 569         return ret;
 570 }
 571
 572 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 573 {
 574         struct qeth_reply *reply;
 575
 576         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 577         if (reply) {
 578                 refcount_set(&reply->refcnt, 1);
 579                 atomic_set(&reply->received, 0);
 580                 reply->card = card;
 581         }
 582         return reply;
 583 }
 584
 585 static void qeth_get_reply(struct qeth_reply *reply)
 586 {
 587         refcount_inc(&reply->refcnt);
 588 }
 589
 590 static void qeth_put_reply(struct qeth_reply *reply)
 591 {
 592         if (refcount_dec_and_test(&reply->refcnt))
 593                 kfree(reply);
 594 }
 595
 596 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 597                 struct qeth_card *card)
 598 {
 599         char *ipa_name;
 600         int com = cmd->hdr.command;
 601         ipa_name = qeth_get_ipa_cmd_name(com);
 602         if (rc)
 603                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 604                                 "x%X \"%s\"\n",
 605                                 ipa_name, com, dev_name(&card->gdev->dev),
 606                                 QETH_CARD_IFNAME(card), rc,
 607                                 qeth_get_ipa_msg(rc));
 608         else
 609                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 610                                 ipa_name, com, dev_name(&card->gdev->dev),
 611                                 QETH_CARD_IFNAME(card));
 612 }
 613
 614 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 615                 struct qeth_cmd_buffer *iob)
 616 {
 617         struct qeth_ipa_cmd *cmd = NULL;
 618
 619         QETH_CARD_TEXT(card, 5, "chkipad");
 620         if (IS_IPA(iob->data)) {
 621                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 622                 if (IS_IPA_REPLY(cmd)) {
 623                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 624                             cmd->hdr.command != IPA_CMD_DELCCID &&
 625                             cmd->hdr.command != IPA_CMD_MODCCID &&
 626                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 627                                 qeth_issue_ipa_msg(cmd,
 628                                                 cmd->hdr.return_code, card);
 629                         return cmd;
 630                 } else {
 631                         switch (cmd->hdr.command) {
 632                         case IPA_CMD_STOPLAN:
 633                                 if (cmd->hdr.return_code ==
 634                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 635                                         dev_err(&card->gdev->dev,
 636                                            "Interface %s is down because the "
 637                                            "adjacent port is no longer in "
 638                                            "reflective relay mode\n",
 639                                            QETH_CARD_IFNAME(card));
 640                                         qeth_close_dev(card);
 641                                 } else {
 642                                         dev_warn(&card->gdev->dev,
 643                                            "The link for interface %s on CHPID"
 644                                            " 0x%X failed\n",
 645                                            QETH_CARD_IFNAME(card),
 646                                            card->info.chpid);
 647                                         qeth_issue_ipa_msg(cmd,
 648                                                 cmd->hdr.return_code, card);
 649                                 }
 650                                 card->lan_online = 0;
 651                                 if (card->dev && netif_carrier_ok(card->dev))
 652                                         netif_carrier_off(card->dev);
 653                                 return NULL;
 654                         case IPA_CMD_STARTLAN:
 655                                 dev_info(&card->gdev->dev,
 656                                            "The link for %s on CHPID 0x%X has"
 657                                            " been restored\n",
 658                                            QETH_CARD_IFNAME(card),
 659                                            card->info.chpid);
 660                                 netif_carrier_on(card->dev);
 661                                 card->lan_online = 1;
 662                                 if (card->info.hwtrap)
 663                                         card->info.hwtrap = 2;
 664                                 qeth_schedule_recovery(card);
 665                                 return NULL;
 666                         case IPA_CMD_SETBRIDGEPORT_IQD:
 667                         case IPA_CMD_SETBRIDGEPORT_OSA:
 668                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 669                                 if (card->discipline->control_event_handler
 670                                                                 (card, cmd))
 671                                         return cmd;
 672                                 else
 673                                         return NULL;
 674                         case IPA_CMD_MODCCID:
 675                                 return cmd;
 676                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 677                                 QETH_CARD_TEXT(card, 3, "irla");
 678                                 break;
 679                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 680                                 QETH_CARD_TEXT(card, 3, "urla");
 681                                 break;
 682                         default:
 683                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 684                                            "but not a reply!\n");
 685                                 break;
 686                         }
 687                 }
 688         }
 689         return cmd;
 690 }
 691
 692 void qeth_clear_ipacmd_list(struct qeth_card *card)
 693 {
 694         struct qeth_reply *reply, *r;
 695         unsigned long flags;
 696
 697         QETH_CARD_TEXT(card, 4, "clipalst");
 698
 699         spin_lock_irqsave(&card->lock, flags);
 700         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 701                 qeth_get_reply(reply);
 702                 reply->rc = -EIO;
 703                 atomic_inc(&reply->received);
 704                 list_del_init(&reply->list);
 705                 wake_up(&reply->wait_q);
 706                 qeth_put_reply(reply);
 707         }
 708         spin_unlock_irqrestore(&card->lock, flags);
 709         atomic_set(&card->write.irq_pending, 0);
 710 }
 711 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 712
 713 static int qeth_check_idx_response(struct qeth_card *card,
 714         unsigned char *buffer)
 715 {
 716         if (!buffer)
 717                 return 0;
 718
 719         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 720         if ((buffer[2] & 0xc0) == 0xc0) {
 721                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
 722                            "with cause code 0x%02x%s\n",
 723                            buffer[4],
 724                            ((buffer[4] == 0x22) ?
 725                             " -- try another portname" : ""));
 726                 QETH_CARD_TEXT(card, 2, "ckidxres");
 727                 QETH_CARD_TEXT(card, 2, " idxterm");
 728                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 729                 if (buffer[4] == 0xf6) {
 730                         dev_err(&card->gdev->dev,
 731                         "The qeth device is not configured "
 732                         "for the OSI layer required by z/VM\n");
 733                         return -EPERM;
 734                 }
 735                 return -EIO;
 736         }
 737         return 0;
 738 }
 739
 740 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 741 {
 742         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 743                 dev_get_drvdata(&cdev->dev))->dev);
 744         return card;
 745 }
 746
 747 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
 748                 __u32 len)
 749 {
 750         struct qeth_card *card;
 751
 752         card = CARD_FROM_CDEV(channel->ccwdev);
 753         QETH_CARD_TEXT(card, 4, "setupccw");
 754         if (channel == &card->read)
 755                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
 756         else
 757                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
 758         channel->ccw.count = len;
 759         channel->ccw.cda = (__u32) __pa(iob);
 760 }
 761
 762 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 763 {
 764         __u8 index;
 765
 766         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 767         index = channel->io_buf_no;
 768         do {
 769                 if (channel->iob[index].state == BUF_STATE_FREE) {
 770                         channel->iob[index].state = BUF_STATE_LOCKED;
 771                         channel->io_buf_no = (channel->io_buf_no + 1) %
 772                                 QETH_CMD_BUFFER_NO;
 773                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 774                         return channel->iob + index;
 775                 }
 776                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 777         } while (index != channel->io_buf_no);
 778
 779         return NULL;
 780 }
 781
 782 void qeth_release_buffer(struct qeth_channel *channel,
 783                 struct qeth_cmd_buffer *iob)
 784 {
 785         unsigned long flags;
 786
 787         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 788         spin_lock_irqsave(&channel->iob_lock, flags);
 789         memset(iob->data, 0, QETH_BUFSIZE);
 790         iob->state = BUF_STATE_FREE;
 791         iob->callback = qeth_send_control_data_cb;
 792         iob->rc = 0;
 793         spin_unlock_irqrestore(&channel->iob_lock, flags);
 794         wake_up(&channel->wait_q);
 795 }
 796 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 797
 798 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 799 {
 800         struct qeth_cmd_buffer *buffer = NULL;
 801         unsigned long flags;
 802
 803         spin_lock_irqsave(&channel->iob_lock, flags);
 804         buffer = __qeth_get_buffer(channel);
 805         spin_unlock_irqrestore(&channel->iob_lock, flags);
 806         return buffer;
 807 }
 808
 809 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 810 {
 811         struct qeth_cmd_buffer *buffer;
 812         wait_event(channel->wait_q,
 813                    ((buffer = qeth_get_buffer(channel)) != NULL));
 814         return buffer;
 815 }
 816 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 817
 818 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 819 {
 820         int cnt;
 821
 822         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 823                 qeth_release_buffer(channel, &channel->iob[cnt]);
 824         channel->buf_no = 0;
 825         channel->io_buf_no = 0;
 826 }
 827 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 828
 829 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 830                   struct qeth_cmd_buffer *iob)
 831 {
 832         struct qeth_card *card;
 833         struct qeth_reply *reply, *r;
 834         struct qeth_ipa_cmd *cmd;
 835         unsigned long flags;
 836         int keep_reply;
 837         int rc = 0;
 838
 839         card = CARD_FROM_CDEV(channel->ccwdev);
 840         QETH_CARD_TEXT(card, 4, "sndctlcb");
 841         rc = qeth_check_idx_response(card, iob->data);
 842         switch (rc) {
 843         case 0:
 844                 break;
 845         case -EIO:
 846                 qeth_clear_ipacmd_list(card);
 847                 qeth_schedule_recovery(card);
 848                 /* fall through */
 849         default:
 850                 goto out;
 851         }
 852
 853         cmd = qeth_check_ipa_data(card, iob);
 854         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 855                 goto out;
 856         /*in case of OSN : check if cmd is set */
 857         if (card->info.type == QETH_CARD_TYPE_OSN &&
 858             cmd &&
 859             cmd->hdr.command != IPA_CMD_STARTLAN &&
 860             card->osn_info.assist_cb != NULL) {
 861                 card->osn_info.assist_cb(card->dev, cmd);
 862                 goto out;
 863         }
 864
 865         spin_lock_irqsave(&card->lock, flags);
 866         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 867                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 868                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 869                         qeth_get_reply(reply);
 870                         list_del_init(&reply->list);
 871                         spin_unlock_irqrestore(&card->lock, flags);
 872                         keep_reply = 0;
 873                         if (reply->callback != NULL) {
 874                                 if (cmd) {
 875                                         reply->offset = (__u16)((char *)cmd -
 876                                                         (char *)iob->data);
 877                                         keep_reply = reply->callback(card,
 878                                                         reply,
 879                                                         (unsigned long)cmd);
 880                                 } else
 881                                         keep_reply = reply->callback(card,
 882                                                         reply,
 883                                                         (unsigned long)iob);
 884                         }
 885                         if (cmd)
 886                                 reply->rc = (u16) cmd->hdr.return_code;
 887                         else if (iob->rc)
 888                                 reply->rc = iob->rc;
 889                         if (keep_reply) {
 890                                 spin_lock_irqsave(&card->lock, flags);
 891                                 list_add_tail(&reply->list,
 892                                               &card->cmd_waiter_list);
 893                                 spin_unlock_irqrestore(&card->lock, flags);
 894                         } else {
 895                                 atomic_inc(&reply->received);
 896                                 wake_up(&reply->wait_q);
 897                         }
 898                         qeth_put_reply(reply);
 899                         goto out;
 900                 }
 901         }
 902         spin_unlock_irqrestore(&card->lock, flags);
 903 out:
 904         memcpy(&card->seqno.pdu_hdr_ack,
 905                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 906                 QETH_SEQ_NO_LENGTH);
 907         qeth_release_buffer(channel, iob);
 908 }
 909
 910 static int qeth_setup_channel(struct qeth_channel *channel)
 911 {
 912         int cnt;
 913
 914         QETH_DBF_TEXT(SETUP, 2, "setupch");
 915         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 916                 channel->iob[cnt].data =
 917                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 918                 if (channel->iob[cnt].data == NULL)
 919                         break;
 920                 channel->iob[cnt].state = BUF_STATE_FREE;
 921                 channel->iob[cnt].channel = channel;
 922                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 923                 channel->iob[cnt].rc = 0;
 924         }
 925         if (cnt < QETH_CMD_BUFFER_NO) {
 926                 while (cnt-- > 0)
 927                         kfree(channel->iob[cnt].data);
 928                 return -ENOMEM;
 929         }
 930         channel->buf_no = 0;
 931         channel->io_buf_no = 0;
 932         atomic_set(&channel->irq_pending, 0);
 933         spin_lock_init(&channel->iob_lock);
 934
 935         init_waitqueue_head(&channel->wait_q);
 936         return 0;
 937 }
 938
 939 static int qeth_set_thread_start_bit(struct qeth_card *card,
 940                 unsigned long thread)
 941 {
 942         unsigned long flags;
 943
 944         spin_lock_irqsave(&card->thread_mask_lock, flags);
 945         if (!(card->thread_allowed_mask & thread) ||
 946               (card->thread_start_mask & thread)) {
 947                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 948                 return -EPERM;
 949         }
 950         card->thread_start_mask |= thread;
 951         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 952         return 0;
 953 }
 954
 955 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 956 {
 957         unsigned long flags;
 958
 959         spin_lock_irqsave(&card->thread_mask_lock, flags);
 960         card->thread_start_mask &= ~thread;
 961         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 962         wake_up(&card->wait_q);
 963 }
 964 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 965
 966 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 967 {
 968         unsigned long flags;
 969
 970         spin_lock_irqsave(&card->thread_mask_lock, flags);
 971         card->thread_running_mask &= ~thread;
 972         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 973         wake_up_all(&card->wait_q);
 974 }
 975 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 976
 977 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 978 {
 979         unsigned long flags;
 980         int rc = 0;
 981
 982         spin_lock_irqsave(&card->thread_mask_lock, flags);
 983         if (card->thread_start_mask & thread) {
 984                 if ((card->thread_allowed_mask & thread) &&
 985                     !(card->thread_running_mask & thread)) {
 986                         rc = 1;
 987                         card->thread_start_mask &= ~thread;
 988                         card->thread_running_mask |= thread;
 989                 } else
 990                         rc = -EPERM;
 991         }
 992         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 993         return rc;
 994 }
 995
 996 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 997 {
 998         int rc = 0;
 999
1000         wait_event(card->wait_q,
1001                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1002         return rc;
1003 }
1004 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
1005
1006 void qeth_schedule_recovery(struct qeth_card *card)
1007 {
1008         QETH_CARD_TEXT(card, 2, "startrec");
1009         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
1010                 schedule_work(&card->kernel_thread_starter);
1011 }
1012 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
1013
1014 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
1015 {
1016         int dstat, cstat;
1017         char *sense;
1018         struct qeth_card *card;
1019
1020         sense = (char *) irb->ecw;
1021         cstat = irb->scsw.cmd.cstat;
1022         dstat = irb->scsw.cmd.dstat;
1023         card = CARD_FROM_CDEV(cdev);
1024
1025         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1026                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1027                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1028                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1029                 dev_warn(&cdev->dev, "The qeth device driver "
1030                         "failed to recover an error on the device\n");
1031                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1032                         dev_name(&cdev->dev), dstat, cstat);
1033                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1034                                 16, 1, irb, 64, 1);
1035                 return 1;
1036         }
1037
1038         if (dstat & DEV_STAT_UNIT_CHECK) {
1039                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1040                     SENSE_RESETTING_EVENT_FLAG) {
1041                         QETH_CARD_TEXT(card, 2, "REVIND");
1042                         return 1;
1043                 }
1044                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1045                     SENSE_COMMAND_REJECT_FLAG) {
1046                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1047                         return 1;
1048                 }
1049                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1050                         QETH_CARD_TEXT(card, 2, "AFFE");
1051                         return 1;
1052                 }
1053                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1054                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1055                         return 0;
1056                 }
1057                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1058                         return 1;
1059         }
1060         return 0;
1061 }
1062
1063 static long __qeth_check_irb_error(struct ccw_device *cdev,
1064                 unsigned long intparm, struct irb *irb)
1065 {
1066         struct qeth_card *card;
1067
1068         card = CARD_FROM_CDEV(cdev);
1069
1070         if (!card || !IS_ERR(irb))
1071                 return 0;
1072
1073         switch (PTR_ERR(irb)) {
1074         case -EIO:
1075                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1076                         dev_name(&cdev->dev));
1077                 QETH_CARD_TEXT(card, 2, "ckirberr");
1078                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1079                 break;
1080         case -ETIMEDOUT:
1081                 dev_warn(&cdev->dev, "A hardware operation timed out"
1082                         " on the device\n");
1083                 QETH_CARD_TEXT(card, 2, "ckirberr");
1084                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1085                 if (intparm == QETH_RCD_PARM) {
1086                         if (card->data.ccwdev == cdev) {
1087                                 card->data.state = CH_STATE_DOWN;
1088                                 wake_up(&card->wait_q);
1089                         }
1090                 }
1091                 break;
1092         default:
1093                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1094                         dev_name(&cdev->dev), PTR_ERR(irb));
1095                 QETH_CARD_TEXT(card, 2, "ckirberr");
1096                 QETH_CARD_TEXT(card, 2, "  rc???");
1097         }
1098         return PTR_ERR(irb);
1099 }
1100
1101 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1102                 struct irb *irb)
1103 {
1104         int rc;
1105         int cstat, dstat;
1106         struct qeth_cmd_buffer *buffer;
1107         struct qeth_channel *channel;
1108         struct qeth_card *card;
1109         struct qeth_cmd_buffer *iob;
1110         __u8 index;
1111
1112         if (__qeth_check_irb_error(cdev, intparm, irb))
1113                 return;
1114         cstat = irb->scsw.cmd.cstat;
1115         dstat = irb->scsw.cmd.dstat;
1116
1117         card = CARD_FROM_CDEV(cdev);
1118         if (!card)
1119                 return;
1120
1121         QETH_CARD_TEXT(card, 5, "irq");
1122
1123         if (card->read.ccwdev == cdev) {
1124                 channel = &card->read;
1125                 QETH_CARD_TEXT(card, 5, "read");
1126         } else if (card->write.ccwdev == cdev) {
1127                 channel = &card->write;
1128                 QETH_CARD_TEXT(card, 5, "write");
1129         } else {
1130                 channel = &card->data;
1131                 QETH_CARD_TEXT(card, 5, "data");
1132         }
1133         atomic_set(&channel->irq_pending, 0);
1134
1135         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1136                 channel->state = CH_STATE_STOPPED;
1137
1138         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1139                 channel->state = CH_STATE_HALTED;
1140
1141         /*let's wake up immediately on data channel*/
1142         if ((channel == &card->data) && (intparm != 0) &&
1143             (intparm != QETH_RCD_PARM))
1144                 goto out;
1145
1146         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1147                 QETH_CARD_TEXT(card, 6, "clrchpar");
1148                 /* we don't have to handle this further */
1149                 intparm = 0;
1150         }
1151         if (intparm == QETH_HALT_CHANNEL_PARM) {
1152                 QETH_CARD_TEXT(card, 6, "hltchpar");
1153                 /* we don't have to handle this further */
1154                 intparm = 0;
1155         }
1156         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1157             (dstat & DEV_STAT_UNIT_CHECK) ||
1158             (cstat)) {
1159                 if (irb->esw.esw0.erw.cons) {
1160                         dev_warn(&channel->ccwdev->dev,
1161                                 "The qeth device driver failed to recover "
1162                                 "an error on the device\n");
1163                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1164                                 "0x%X dstat 0x%X\n",
1165                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1166                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1167                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1168                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1169                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1170                 }
1171                 if (intparm == QETH_RCD_PARM) {
1172                         channel->state = CH_STATE_DOWN;
1173                         goto out;
1174                 }
1175                 rc = qeth_get_problem(cdev, irb);
1176                 if (rc) {
1177                         card->read_or_write_problem = 1;
1178                         qeth_clear_ipacmd_list(card);
1179                         qeth_schedule_recovery(card);
1180                         goto out;
1181                 }
1182         }
1183
1184         if (intparm == QETH_RCD_PARM) {
1185                 channel->state = CH_STATE_RCD_DONE;
1186                 goto out;
1187         }
1188         if (intparm) {
1189                 buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1190                 buffer->state = BUF_STATE_PROCESSED;
1191         }
1192         if (channel == &card->data)
1193                 return;
1194         if (channel == &card->read &&
1195             channel->state == CH_STATE_UP)
1196                 __qeth_issue_next_read(card);
1197
1198         iob = channel->iob;
1199         index = channel->buf_no;
1200         while (iob[index].state == BUF_STATE_PROCESSED) {
1201                 if (iob[index].callback != NULL)
1202                         iob[index].callback(channel, iob + index);
1203
1204                 index = (index + 1) % QETH_CMD_BUFFER_NO;
1205         }
1206         channel->buf_no = index;
1207 out:
1208         wake_up(&card->wait_q);
1209         return;
1210 }
1211
1212 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1213                 struct qeth_qdio_out_buffer *buf,
1214                 enum iucv_tx_notify notification)
1215 {
1216         struct sk_buff *skb;
1217
1218         if (skb_queue_empty(&buf->skb_list))
1219                 goto out;
1220         skb = skb_peek(&buf->skb_list);
1221         while (skb) {
1222                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1223                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1224                 if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1225                         if (skb->sk) {
1226                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1227                                 iucv->sk_txnotify(skb, notification);
1228                         }
1229                 }
1230                 if (skb_queue_is_last(&buf->skb_list, skb))
1231                         skb = NULL;
1232                 else
1233                         skb = skb_queue_next(&buf->skb_list, skb);
1234         }
1235 out:
1236         return;
1237 }
1238
1239 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1240 {
1241         struct sk_buff *skb;
1242         struct iucv_sock *iucv;
1243         int notify_general_error = 0;
1244
1245         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1246                 notify_general_error = 1;
1247
1248         /* release may never happen from within CQ tasklet scope */
1249         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1250
1251         skb = skb_dequeue(&buf->skb_list);
1252         while (skb) {
1253                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1254                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1255                 if (notify_general_error &&
1256                     be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1257                         if (skb->sk) {
1258                                 iucv = iucv_sk(skb->sk);
1259                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1260                         }
1261                 }
1262                 refcount_dec(&skb->users);
1263                 dev_kfree_skb_any(skb);
1264                 skb = skb_dequeue(&buf->skb_list);
1265         }
1266 }
1267
1268 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1269                 struct qeth_qdio_out_buffer *buf,
1270                 enum qeth_qdio_buffer_states newbufstate)
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         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1279                 qeth_release_skbs(buf);
1280         }
1281         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1282                 if (buf->buffer->element[i].addr && buf->is_header[i])
1283                         kmem_cache_free(qeth_core_header_cache,
1284                                 buf->buffer->element[i].addr);
1285                 buf->is_header[i] = 0;
1286                 buf->buffer->element[i].length = 0;
1287                 buf->buffer->element[i].addr = NULL;
1288                 buf->buffer->element[i].eflags = 0;
1289                 buf->buffer->element[i].sflags = 0;
1290         }
1291         buf->buffer->element[15].eflags = 0;
1292         buf->buffer->element[15].sflags = 0;
1293         buf->next_element_to_fill = 0;
1294         atomic_set(&buf->state, newbufstate);
1295 }
1296
1297 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1298 {
1299         int j;
1300
1301         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1302                 if (!q->bufs[j])
1303                         continue;
1304                 qeth_cleanup_handled_pending(q, j, 1);
1305                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1306                 if (free) {
1307                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1308                         q->bufs[j] = NULL;
1309                 }
1310         }
1311 }
1312
1313 void qeth_clear_qdio_buffers(struct qeth_card *card)
1314 {
1315         int i;
1316
1317         QETH_CARD_TEXT(card, 2, "clearqdbf");
1318         /* clear outbound buffers to free skbs */
1319         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1320                 if (card->qdio.out_qs[i]) {
1321                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1322                 }
1323         }
1324 }
1325 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1326
1327 static void qeth_free_buffer_pool(struct qeth_card *card)
1328 {
1329         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1330         int i = 0;
1331         list_for_each_entry_safe(pool_entry, tmp,
1332                                  &card->qdio.init_pool.entry_list, init_list){
1333                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1334                         free_page((unsigned long)pool_entry->elements[i]);
1335                 list_del(&pool_entry->init_list);
1336                 kfree(pool_entry);
1337         }
1338 }
1339
1340 static void qeth_clean_channel(struct qeth_channel *channel)
1341 {
1342         int cnt;
1343
1344         QETH_DBF_TEXT(SETUP, 2, "freech");
1345         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1346                 kfree(channel->iob[cnt].data);
1347 }
1348
1349 static void qeth_set_single_write_queues(struct qeth_card *card)
1350 {
1351         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1352             (card->qdio.no_out_queues == 4))
1353                 qeth_free_qdio_buffers(card);
1354
1355         card->qdio.no_out_queues = 1;
1356         if (card->qdio.default_out_queue != 0)
1357                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1358
1359         card->qdio.default_out_queue = 0;
1360 }
1361
1362 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1363 {
1364         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1365             (card->qdio.no_out_queues == 1)) {
1366                 qeth_free_qdio_buffers(card);
1367                 card->qdio.default_out_queue = 2;
1368         }
1369         card->qdio.no_out_queues = 4;
1370 }
1371
1372 static void qeth_update_from_chp_desc(struct qeth_card *card)
1373 {
1374         struct ccw_device *ccwdev;
1375         struct channel_path_desc *chp_dsc;
1376
1377         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1378
1379         ccwdev = card->data.ccwdev;
1380         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1381         if (!chp_dsc)
1382                 goto out;
1383
1384         card->info.func_level = 0x4100 + chp_dsc->desc;
1385         if (card->info.type == QETH_CARD_TYPE_IQD)
1386                 goto out;
1387
1388         /* CHPP field bit 6 == 1 -> single queue */
1389         if ((chp_dsc->chpp & 0x02) == 0x02)
1390                 qeth_set_single_write_queues(card);
1391         else
1392                 qeth_set_multiple_write_queues(card);
1393 out:
1394         kfree(chp_dsc);
1395         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1396         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1397 }
1398
1399 static void qeth_init_qdio_info(struct qeth_card *card)
1400 {
1401         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1402         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1403         /* inbound */
1404         card->qdio.no_in_queues = 1;
1405         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1406         if (card->info.type == QETH_CARD_TYPE_IQD)
1407                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1408         else
1409                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1410         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1411         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1412         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1413 }
1414
1415 static void qeth_set_intial_options(struct qeth_card *card)
1416 {
1417         card->options.route4.type = NO_ROUTER;
1418         card->options.route6.type = NO_ROUTER;
1419         card->options.fake_broadcast = 0;
1420         card->options.performance_stats = 0;
1421         card->options.rx_sg_cb = QETH_RX_SG_CB;
1422         card->options.isolation = ISOLATION_MODE_NONE;
1423         card->options.cq = QETH_CQ_DISABLED;
1424 }
1425
1426 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1427 {
1428         unsigned long flags;
1429         int rc = 0;
1430
1431         spin_lock_irqsave(&card->thread_mask_lock, flags);
1432         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1433                         (u8) card->thread_start_mask,
1434                         (u8) card->thread_allowed_mask,
1435                         (u8) card->thread_running_mask);
1436         rc = (card->thread_start_mask & thread);
1437         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1438         return rc;
1439 }
1440
1441 static void qeth_start_kernel_thread(struct work_struct *work)
1442 {
1443         struct task_struct *ts;
1444         struct qeth_card *card = container_of(work, struct qeth_card,
1445                                         kernel_thread_starter);
1446         QETH_CARD_TEXT(card , 2, "strthrd");
1447
1448         if (card->read.state != CH_STATE_UP &&
1449             card->write.state != CH_STATE_UP)
1450                 return;
1451         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1452                 ts = kthread_run(card->discipline->recover, (void *)card,
1453                                 "qeth_recover");
1454                 if (IS_ERR(ts)) {
1455                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1456                         qeth_clear_thread_running_bit(card,
1457                                 QETH_RECOVER_THREAD);
1458                 }
1459         }
1460 }
1461
1462 static void qeth_buffer_reclaim_work(struct work_struct *);
1463 static int qeth_setup_card(struct qeth_card *card)
1464 {
1465
1466         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1467         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1468
1469         card->read.state  = CH_STATE_DOWN;
1470         card->write.state = CH_STATE_DOWN;
1471         card->data.state  = CH_STATE_DOWN;
1472         card->state = CARD_STATE_DOWN;
1473         card->lan_online = 0;
1474         card->read_or_write_problem = 0;
1475         card->dev = NULL;
1476         spin_lock_init(&card->vlanlock);
1477         spin_lock_init(&card->mclock);
1478         spin_lock_init(&card->lock);
1479         spin_lock_init(&card->ip_lock);
1480         spin_lock_init(&card->thread_mask_lock);
1481         mutex_init(&card->conf_mutex);
1482         mutex_init(&card->discipline_mutex);
1483         card->thread_start_mask = 0;
1484         card->thread_allowed_mask = 0;
1485         card->thread_running_mask = 0;
1486         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1487         INIT_LIST_HEAD(&card->cmd_waiter_list);
1488         init_waitqueue_head(&card->wait_q);
1489         /* initial options */
1490         qeth_set_intial_options(card);
1491         /* IP address takeover */
1492         INIT_LIST_HEAD(&card->ipato.entries);
1493         card->ipato.enabled = false;
1494         card->ipato.invert4 = false;
1495         card->ipato.invert6 = false;
1496         /* init QDIO stuff */
1497         qeth_init_qdio_info(card);
1498         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1499         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1500         return 0;
1501 }
1502
1503 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1504 {
1505         struct qeth_card *card = container_of(slr, struct qeth_card,
1506                                         qeth_service_level);
1507         if (card->info.mcl_level[0])
1508                 seq_printf(m, "qeth: %s firmware level %s\n",
1509                         CARD_BUS_ID(card), card->info.mcl_level);
1510 }
1511
1512 static struct qeth_card *qeth_alloc_card(void)
1513 {
1514         struct qeth_card *card;
1515
1516         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1517         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1518         if (!card)
1519                 goto out;
1520         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1521         if (qeth_setup_channel(&card->read))
1522                 goto out_ip;
1523         if (qeth_setup_channel(&card->write))
1524                 goto out_channel;
1525         card->options.layer2 = -1;
1526         card->qeth_service_level.seq_print = qeth_core_sl_print;
1527         register_service_level(&card->qeth_service_level);
1528         return card;
1529
1530 out_channel:
1531         qeth_clean_channel(&card->read);
1532 out_ip:
1533         kfree(card);
1534 out:
1535         return NULL;
1536 }
1537
1538 static void qeth_determine_card_type(struct qeth_card *card)
1539 {
1540         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1541
1542         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1543         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1544         card->info.type = CARD_RDEV(card)->id.driver_info;
1545         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1546         if (card->info.type == QETH_CARD_TYPE_IQD)
1547                 card->info.is_multicast_different = 0x0103;
1548         qeth_update_from_chp_desc(card);
1549 }
1550
1551 static int qeth_clear_channel(struct qeth_channel *channel)
1552 {
1553         unsigned long flags;
1554         struct qeth_card *card;
1555         int rc;
1556
1557         card = CARD_FROM_CDEV(channel->ccwdev);
1558         QETH_CARD_TEXT(card, 3, "clearch");
1559         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1560         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1561         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1562
1563         if (rc)
1564                 return rc;
1565         rc = wait_event_interruptible_timeout(card->wait_q,
1566                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1567         if (rc == -ERESTARTSYS)
1568                 return rc;
1569         if (channel->state != CH_STATE_STOPPED)
1570                 return -ETIME;
1571         channel->state = CH_STATE_DOWN;
1572         return 0;
1573 }
1574
1575 static int qeth_halt_channel(struct qeth_channel *channel)
1576 {
1577         unsigned long flags;
1578         struct qeth_card *card;
1579         int rc;
1580
1581         card = CARD_FROM_CDEV(channel->ccwdev);
1582         QETH_CARD_TEXT(card, 3, "haltch");
1583         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1584         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1585         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1586
1587         if (rc)
1588                 return rc;
1589         rc = wait_event_interruptible_timeout(card->wait_q,
1590                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1591         if (rc == -ERESTARTSYS)
1592                 return rc;
1593         if (channel->state != CH_STATE_HALTED)
1594                 return -ETIME;
1595         return 0;
1596 }
1597
1598 static int qeth_halt_channels(struct qeth_card *card)
1599 {
1600         int rc1 = 0, rc2 = 0, rc3 = 0;
1601
1602         QETH_CARD_TEXT(card, 3, "haltchs");
1603         rc1 = qeth_halt_channel(&card->read);
1604         rc2 = qeth_halt_channel(&card->write);
1605         rc3 = qeth_halt_channel(&card->data);
1606         if (rc1)
1607                 return rc1;
1608         if (rc2)
1609                 return rc2;
1610         return rc3;
1611 }
1612
1613 static int qeth_clear_channels(struct qeth_card *card)
1614 {
1615         int rc1 = 0, rc2 = 0, rc3 = 0;
1616
1617         QETH_CARD_TEXT(card, 3, "clearchs");
1618         rc1 = qeth_clear_channel(&card->read);
1619         rc2 = qeth_clear_channel(&card->write);
1620         rc3 = qeth_clear_channel(&card->data);
1621         if (rc1)
1622                 return rc1;
1623         if (rc2)
1624                 return rc2;
1625         return rc3;
1626 }
1627
1628 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1629 {
1630         int rc = 0;
1631
1632         QETH_CARD_TEXT(card, 3, "clhacrd");
1633
1634         if (halt)
1635                 rc = qeth_halt_channels(card);
1636         if (rc)
1637                 return rc;
1638         return qeth_clear_channels(card);
1639 }
1640
1641 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1642 {
1643         int rc = 0;
1644
1645         QETH_CARD_TEXT(card, 3, "qdioclr");
1646         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1647                 QETH_QDIO_CLEANING)) {
1648         case QETH_QDIO_ESTABLISHED:
1649                 if (card->info.type == QETH_CARD_TYPE_IQD)
1650                         rc = qdio_shutdown(CARD_DDEV(card),
1651                                 QDIO_FLAG_CLEANUP_USING_HALT);
1652                 else
1653                         rc = qdio_shutdown(CARD_DDEV(card),
1654                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1655                 if (rc)
1656                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1657                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1658                 break;
1659         case QETH_QDIO_CLEANING:
1660                 return rc;
1661         default:
1662                 break;
1663         }
1664         rc = qeth_clear_halt_card(card, use_halt);
1665         if (rc)
1666                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1667         card->state = CARD_STATE_DOWN;
1668         return rc;
1669 }
1670 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1671
1672 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1673                                int *length)
1674 {
1675         struct ciw *ciw;
1676         char *rcd_buf;
1677         int ret;
1678         struct qeth_channel *channel = &card->data;
1679         unsigned long flags;
1680
1681         /*
1682          * scan for RCD command in extended SenseID data
1683          */
1684         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1685         if (!ciw || ciw->cmd == 0)
1686                 return -EOPNOTSUPP;
1687         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1688         if (!rcd_buf)
1689                 return -ENOMEM;
1690
1691         channel->ccw.cmd_code = ciw->cmd;
1692         channel->ccw.cda = (__u32) __pa(rcd_buf);
1693         channel->ccw.count = ciw->count;
1694         channel->ccw.flags = CCW_FLAG_SLI;
1695         channel->state = CH_STATE_RCD;
1696         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1697         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1698                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1699                                        QETH_RCD_TIMEOUT);
1700         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1701         if (!ret)
1702                 wait_event(card->wait_q,
1703                            (channel->state == CH_STATE_RCD_DONE ||
1704                             channel->state == CH_STATE_DOWN));
1705         if (channel->state == CH_STATE_DOWN)
1706                 ret = -EIO;
1707         else
1708                 channel->state = CH_STATE_DOWN;
1709         if (ret) {
1710                 kfree(rcd_buf);
1711                 *buffer = NULL;
1712                 *length = 0;
1713         } else {
1714                 *length = ciw->count;
1715                 *buffer = rcd_buf;
1716         }
1717         return ret;
1718 }
1719
1720 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1721 {
1722         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1723         card->info.chpid = prcd[30];
1724         card->info.unit_addr2 = prcd[31];
1725         card->info.cula = prcd[63];
1726         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1727                                (prcd[0x11] == _ascebc['M']));
1728 }
1729
1730 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1731 {
1732         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1733         struct diag26c_vnic_resp *response = NULL;
1734         struct diag26c_vnic_req *request = NULL;
1735         struct ccw_dev_id id;
1736         char userid[80];
1737         int rc = 0;
1738
1739         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1740
1741         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1742         if (rc)
1743                 goto out;
1744
1745         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1746         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1747         if (!request || !response) {
1748                 rc = -ENOMEM;
1749                 goto out;
1750         }
1751
1752         ccw_device_get_id(CARD_RDEV(card), &id);
1753         request->resp_buf_len = sizeof(*response);
1754         request->resp_version = DIAG26C_VERSION6_VM65918;
1755         request->req_format = DIAG26C_VNIC_INFO;
1756         ASCEBC(userid, 8);
1757         memcpy(&request->sys_name, userid, 8);
1758         request->devno = id.devno;
1759
1760         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1761         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1762         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1763         if (rc)
1764                 goto out;
1765         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1766
1767         if (request->resp_buf_len < sizeof(*response) ||
1768             response->version != request->resp_version) {
1769                 rc = -EIO;
1770                 goto out;
1771         }
1772
1773         if (response->protocol == VNIC_INFO_PROT_L2)
1774                 disc = QETH_DISCIPLINE_LAYER2;
1775         else if (response->protocol == VNIC_INFO_PROT_L3)
1776                 disc = QETH_DISCIPLINE_LAYER3;
1777
1778 out:
1779         kfree(response);
1780         kfree(request);
1781         if (rc)
1782                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1783         return disc;
1784 }
1785
1786 /* Determine whether the device requires a specific layer discipline */
1787 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1788 {
1789         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1790
1791         if (card->info.type == QETH_CARD_TYPE_OSM ||
1792             card->info.type == QETH_CARD_TYPE_OSN)
1793                 disc = QETH_DISCIPLINE_LAYER2;
1794         else if (card->info.guestlan)
1795                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1796                                 QETH_DISCIPLINE_LAYER3 :
1797                                 qeth_vm_detect_layer(card);
1798
1799         switch (disc) {
1800         case QETH_DISCIPLINE_LAYER2:
1801                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1802                 break;
1803         case QETH_DISCIPLINE_LAYER3:
1804                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1805                 break;
1806         default:
1807                 QETH_DBF_TEXT(SETUP, 3, "force no");
1808         }
1809
1810         return disc;
1811 }
1812
1813 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1814 {
1815         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1816
1817         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1818             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1819                 card->info.blkt.time_total = 0;
1820                 card->info.blkt.inter_packet = 0;
1821                 card->info.blkt.inter_packet_jumbo = 0;
1822         } else {
1823                 card->info.blkt.time_total = 250;
1824                 card->info.blkt.inter_packet = 5;
1825                 card->info.blkt.inter_packet_jumbo = 15;
1826         }
1827 }
1828
1829 static void qeth_init_tokens(struct qeth_card *card)
1830 {
1831         card->token.issuer_rm_w = 0x00010103UL;
1832         card->token.cm_filter_w = 0x00010108UL;
1833         card->token.cm_connection_w = 0x0001010aUL;
1834         card->token.ulp_filter_w = 0x0001010bUL;
1835         card->token.ulp_connection_w = 0x0001010dUL;
1836 }
1837
1838 static void qeth_init_func_level(struct qeth_card *card)
1839 {
1840         switch (card->info.type) {
1841         case QETH_CARD_TYPE_IQD:
1842                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1843                 break;
1844         case QETH_CARD_TYPE_OSD:
1845         case QETH_CARD_TYPE_OSN:
1846                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1847                 break;
1848         default:
1849                 break;
1850         }
1851 }
1852
1853 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1854                 void (*idx_reply_cb)(struct qeth_channel *,
1855                         struct qeth_cmd_buffer *))
1856 {
1857         struct qeth_cmd_buffer *iob;
1858         unsigned long flags;
1859         int rc;
1860         struct qeth_card *card;
1861
1862         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1863         card = CARD_FROM_CDEV(channel->ccwdev);
1864         iob = qeth_get_buffer(channel);
1865         if (!iob)
1866                 return -ENOMEM;
1867         iob->callback = idx_reply_cb;
1868         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1869         channel->ccw.count = QETH_BUFSIZE;
1870         channel->ccw.cda = (__u32) __pa(iob->data);
1871
1872         wait_event(card->wait_q,
1873                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1874         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1875         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1876         rc = ccw_device_start(channel->ccwdev,
1877                               &channel->ccw, (addr_t) iob, 0, 0);
1878         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1879
1880         if (rc) {
1881                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1882                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1883                 atomic_set(&channel->irq_pending, 0);
1884                 wake_up(&card->wait_q);
1885                 return rc;
1886         }
1887         rc = wait_event_interruptible_timeout(card->wait_q,
1888                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1889         if (rc == -ERESTARTSYS)
1890                 return rc;
1891         if (channel->state != CH_STATE_UP) {
1892                 rc = -ETIME;
1893                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1894                 qeth_clear_cmd_buffers(channel);
1895         } else
1896                 rc = 0;
1897         return rc;
1898 }
1899
1900 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1901                 void (*idx_reply_cb)(struct qeth_channel *,
1902                         struct qeth_cmd_buffer *))
1903 {
1904         struct qeth_card *card;
1905         struct qeth_cmd_buffer *iob;
1906         unsigned long flags;
1907         __u16 temp;
1908         __u8 tmp;
1909         int rc;
1910         struct ccw_dev_id temp_devid;
1911
1912         card = CARD_FROM_CDEV(channel->ccwdev);
1913
1914         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1915
1916         iob = qeth_get_buffer(channel);
1917         if (!iob)
1918                 return -ENOMEM;
1919         iob->callback = idx_reply_cb;
1920         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1921         channel->ccw.count = IDX_ACTIVATE_SIZE;
1922         channel->ccw.cda = (__u32) __pa(iob->data);
1923         if (channel == &card->write) {
1924                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1925                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1926                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1927                 card->seqno.trans_hdr++;
1928         } else {
1929                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1930                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1931                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1932         }
1933         tmp = ((__u8)card->info.portno) | 0x80;
1934         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1935         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1936                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1937         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1938                &card->info.func_level, sizeof(__u16));
1939         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1940         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1941         temp = (card->info.cula << 8) + card->info.unit_addr2;
1942         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1943
1944         wait_event(card->wait_q,
1945                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1946         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1947         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1948         rc = ccw_device_start(channel->ccwdev,
1949                               &channel->ccw, (addr_t) iob, 0, 0);
1950         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1951
1952         if (rc) {
1953                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1954                         rc);
1955                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1956                 atomic_set(&channel->irq_pending, 0);
1957                 wake_up(&card->wait_q);
1958                 return rc;
1959         }
1960         rc = wait_event_interruptible_timeout(card->wait_q,
1961                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1962         if (rc == -ERESTARTSYS)
1963                 return rc;
1964         if (channel->state != CH_STATE_ACTIVATING) {
1965                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1966                         " failed to recover an error on the device\n");
1967                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1968                         dev_name(&channel->ccwdev->dev));
1969                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1970                 qeth_clear_cmd_buffers(channel);
1971                 return -ETIME;
1972         }
1973         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1974 }
1975
1976 static int qeth_peer_func_level(int level)
1977 {
1978         if ((level & 0xff) == 8)
1979                 return (level & 0xff) + 0x400;
1980         if (((level >> 8) & 3) == 1)
1981                 return (level & 0xff) + 0x200;
1982         return level;
1983 }
1984
1985 static void qeth_idx_write_cb(struct qeth_channel *channel,
1986                 struct qeth_cmd_buffer *iob)
1987 {
1988         struct qeth_card *card;
1989         __u16 temp;
1990
1991         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1992
1993         if (channel->state == CH_STATE_DOWN) {
1994                 channel->state = CH_STATE_ACTIVATING;
1995                 goto out;
1996         }
1997         card = CARD_FROM_CDEV(channel->ccwdev);
1998
1999         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2000                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
2001                         dev_err(&card->write.ccwdev->dev,
2002                                 "The adapter is used exclusively by another "
2003                                 "host\n");
2004                 else
2005                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
2006                                 " negative reply\n",
2007                                 dev_name(&card->write.ccwdev->dev));
2008                 goto out;
2009         }
2010         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2011         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
2012                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
2013                         "function level mismatch (sent: 0x%x, received: "
2014                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
2015                         card->info.func_level, temp);
2016                 goto out;
2017         }
2018         channel->state = CH_STATE_UP;
2019 out:
2020         qeth_release_buffer(channel, iob);
2021 }
2022
2023 static void qeth_idx_read_cb(struct qeth_channel *channel,
2024                 struct qeth_cmd_buffer *iob)
2025 {
2026         struct qeth_card *card;
2027         __u16 temp;
2028
2029         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
2030         if (channel->state == CH_STATE_DOWN) {
2031                 channel->state = CH_STATE_ACTIVATING;
2032                 goto out;
2033         }
2034
2035         card = CARD_FROM_CDEV(channel->ccwdev);
2036         if (qeth_check_idx_response(card, iob->data))
2037                         goto out;
2038
2039         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2040                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2041                 case QETH_IDX_ACT_ERR_EXCL:
2042                         dev_err(&card->write.ccwdev->dev,
2043                                 "The adapter is used exclusively by another "
2044                                 "host\n");
2045                         break;
2046                 case QETH_IDX_ACT_ERR_AUTH:
2047                 case QETH_IDX_ACT_ERR_AUTH_USER:
2048                         dev_err(&card->read.ccwdev->dev,
2049                                 "Setting the device online failed because of "
2050                                 "insufficient authorization\n");
2051                         break;
2052                 default:
2053                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2054                                 " negative reply\n",
2055                                 dev_name(&card->read.ccwdev->dev));
2056                 }
2057                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2058                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2059                 goto out;
2060         }
2061
2062         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2063         if (temp != qeth_peer_func_level(card->info.func_level)) {
2064                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2065                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2066                         dev_name(&card->read.ccwdev->dev),
2067                         card->info.func_level, temp);
2068                 goto out;
2069         }
2070         memcpy(&card->token.issuer_rm_r,
2071                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2072                QETH_MPC_TOKEN_LENGTH);
2073         memcpy(&card->info.mcl_level[0],
2074                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2075         channel->state = CH_STATE_UP;
2076 out:
2077         qeth_release_buffer(channel, iob);
2078 }
2079
2080 void qeth_prepare_control_data(struct qeth_card *card, int len,
2081                 struct qeth_cmd_buffer *iob)
2082 {
2083         qeth_setup_ccw(&card->write, iob->data, len);
2084         iob->callback = qeth_release_buffer;
2085
2086         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2087                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2088         card->seqno.trans_hdr++;
2089         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2090                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2091         card->seqno.pdu_hdr++;
2092         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2093                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2094         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2095 }
2096 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2097
2098 /**
2099  * qeth_send_control_data() -   send control command to the card
2100  * @card:                       qeth_card structure pointer
2101  * @len:                        size of the command buffer
2102  * @iob:                        qeth_cmd_buffer pointer
2103  * @reply_cb:                   callback function pointer
2104  * @cb_card:                    pointer to the qeth_card structure
2105  * @cb_reply:                   pointer to the qeth_reply structure
2106  * @cb_cmd:                     pointer to the original iob for non-IPA
2107  *                              commands, or to the qeth_ipa_cmd structure
2108  *                              for the IPA commands.
2109  * @reply_param:                private pointer passed to the callback
2110  *
2111  * Returns the value of the `return_code' field of the response
2112  * block returned from the hardware, or other error indication.
2113  * Value of zero indicates successful execution of the command.
2114  *
2115  * Callback function gets called one or more times, with cb_cmd
2116  * pointing to the response returned by the hardware. Callback
2117  * function must return non-zero if more reply blocks are expected,
2118  * and zero if the last or only reply block is received. Callback
2119  * function can get the value of the reply_param pointer from the
2120  * field 'param' of the structure qeth_reply.
2121  */
2122
2123 int qeth_send_control_data(struct qeth_card *card, int len,
2124                 struct qeth_cmd_buffer *iob,
2125                 int (*reply_cb)(struct qeth_card *cb_card,
2126                                 struct qeth_reply *cb_reply,
2127                                 unsigned long cb_cmd),
2128                 void *reply_param)
2129 {
2130         int rc;
2131         unsigned long flags;
2132         struct qeth_reply *reply = NULL;
2133         unsigned long timeout, event_timeout;
2134         struct qeth_ipa_cmd *cmd = NULL;
2135
2136         QETH_CARD_TEXT(card, 2, "sendctl");
2137
2138         if (card->read_or_write_problem) {
2139                 qeth_release_buffer(iob->channel, iob);
2140                 return -EIO;
2141         }
2142         reply = qeth_alloc_reply(card);
2143         if (!reply) {
2144                 return -ENOMEM;
2145         }
2146         reply->callback = reply_cb;
2147         reply->param = reply_param;
2148
2149         init_waitqueue_head(&reply->wait_q);
2150
2151         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2152
2153         if (IS_IPA(iob->data)) {
2154                 cmd = __ipa_cmd(iob);
2155                 cmd->hdr.seqno = card->seqno.ipa++;
2156                 reply->seqno = cmd->hdr.seqno;
2157                 event_timeout = QETH_IPA_TIMEOUT;
2158         } else {
2159                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2160                 event_timeout = QETH_TIMEOUT;
2161         }
2162         qeth_prepare_control_data(card, len, iob);
2163
2164         spin_lock_irqsave(&card->lock, flags);
2165         list_add_tail(&reply->list, &card->cmd_waiter_list);
2166         spin_unlock_irqrestore(&card->lock, flags);
2167
2168         timeout = jiffies + event_timeout;
2169
2170         QETH_CARD_TEXT(card, 6, "noirqpnd");
2171         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2172         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
2173                               (addr_t) iob, 0, 0);
2174         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2175         if (rc) {
2176                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2177                         "ccw_device_start rc = %i\n",
2178                         dev_name(&card->write.ccwdev->dev), rc);
2179                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2180                 spin_lock_irqsave(&card->lock, flags);
2181                 list_del_init(&reply->list);
2182                 qeth_put_reply(reply);
2183                 spin_unlock_irqrestore(&card->lock, flags);
2184                 qeth_release_buffer(iob->channel, iob);
2185                 atomic_set(&card->write.irq_pending, 0);
2186                 wake_up(&card->wait_q);
2187                 return rc;
2188         }
2189
2190         /* we have only one long running ipassist, since we can ensure
2191            process context of this command we can sleep */
2192         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2193             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2194                 if (!wait_event_timeout(reply->wait_q,
2195                     atomic_read(&reply->received), event_timeout))
2196                         goto time_err;
2197         } else {
2198                 while (!atomic_read(&reply->received)) {
2199                         if (time_after(jiffies, timeout))
2200                                 goto time_err;
2201                         cpu_relax();
2202                 }
2203         }
2204
2205         if (reply->rc == -EIO)
2206                 goto error;
2207         rc = reply->rc;
2208         qeth_put_reply(reply);
2209         return rc;
2210
2211 time_err:
2212         reply->rc = -ETIME;
2213         spin_lock_irqsave(&reply->card->lock, flags);
2214         list_del_init(&reply->list);
2215         spin_unlock_irqrestore(&reply->card->lock, flags);
2216         atomic_inc(&reply->received);
2217 error:
2218         atomic_set(&card->write.irq_pending, 0);
2219         qeth_release_buffer(iob->channel, iob);
2220         card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
2221         rc = reply->rc;
2222         qeth_put_reply(reply);
2223         return rc;
2224 }
2225 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2226
2227 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2228                 unsigned long data)
2229 {
2230         struct qeth_cmd_buffer *iob;
2231
2232         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2233
2234         iob = (struct qeth_cmd_buffer *) data;
2235         memcpy(&card->token.cm_filter_r,
2236                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2237                QETH_MPC_TOKEN_LENGTH);
2238         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2239         return 0;
2240 }
2241
2242 static int qeth_cm_enable(struct qeth_card *card)
2243 {
2244         int rc;
2245         struct qeth_cmd_buffer *iob;
2246
2247         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2248
2249         iob = qeth_wait_for_buffer(&card->write);
2250         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2251         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2252                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2253         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2254                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2255
2256         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2257                                     qeth_cm_enable_cb, NULL);
2258         return rc;
2259 }
2260
2261 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2262                 unsigned long data)
2263 {
2264
2265         struct qeth_cmd_buffer *iob;
2266
2267         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2268
2269         iob = (struct qeth_cmd_buffer *) data;
2270         memcpy(&card->token.cm_connection_r,
2271                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2272                QETH_MPC_TOKEN_LENGTH);
2273         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2274         return 0;
2275 }
2276
2277 static int qeth_cm_setup(struct qeth_card *card)
2278 {
2279         int rc;
2280         struct qeth_cmd_buffer *iob;
2281
2282         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2283
2284         iob = qeth_wait_for_buffer(&card->write);
2285         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2286         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2287                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2288         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2289                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2290         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2291                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2292         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2293                                     qeth_cm_setup_cb, NULL);
2294         return rc;
2295
2296 }
2297
2298 static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2299 {
2300         switch (card->info.type) {
2301         case QETH_CARD_TYPE_IQD:
2302                 return card->info.max_mtu;
2303         case QETH_CARD_TYPE_OSD:
2304         case QETH_CARD_TYPE_OSX:
2305                 if (!card->options.layer2)
2306                         return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */
2307                 /* fall through */
2308         default:
2309                 return ETH_DATA_LEN;
2310         }
2311 }
2312
2313 static int qeth_get_mtu_outof_framesize(int framesize)
2314 {
2315         switch (framesize) {
2316         case 0x4000:
2317                 return 8192;
2318         case 0x6000:
2319                 return 16384;
2320         case 0xa000:
2321                 return 32768;
2322         case 0xffff:
2323                 return 57344;
2324         default:
2325                 return 0;
2326         }
2327 }
2328
2329 static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2330 {
2331         switch (card->info.type) {
2332         case QETH_CARD_TYPE_OSD:
2333         case QETH_CARD_TYPE_OSM:
2334         case QETH_CARD_TYPE_OSX:
2335         case QETH_CARD_TYPE_IQD:
2336                 return ((mtu >= 576) &&
2337                         (mtu <= card->info.max_mtu));
2338         case QETH_CARD_TYPE_OSN:
2339         default:
2340                 return 1;
2341         }
2342 }
2343
2344 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2345                 unsigned long data)
2346 {
2347
2348         __u16 mtu, framesize;
2349         __u16 len;
2350         __u8 link_type;
2351         struct qeth_cmd_buffer *iob;
2352
2353         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2354
2355         iob = (struct qeth_cmd_buffer *) data;
2356         memcpy(&card->token.ulp_filter_r,
2357                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2358                QETH_MPC_TOKEN_LENGTH);
2359         if (card->info.type == QETH_CARD_TYPE_IQD) {
2360                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2361                 mtu = qeth_get_mtu_outof_framesize(framesize);
2362                 if (!mtu) {
2363                         iob->rc = -EINVAL;
2364                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2365                         return 0;
2366                 }
2367                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2368                         /* frame size has changed */
2369                         if (card->dev &&
2370                             ((card->dev->mtu == card->info.initial_mtu) ||
2371                              (card->dev->mtu > mtu)))
2372                                 card->dev->mtu = mtu;
2373                         qeth_free_qdio_buffers(card);
2374                 }
2375                 card->info.initial_mtu = mtu;
2376                 card->info.max_mtu = mtu;
2377                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2378         } else {
2379                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2380                         iob->data);
2381                 card->info.initial_mtu = min(card->info.max_mtu,
2382                                         qeth_get_initial_mtu_for_card(card));
2383                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2384         }
2385
2386         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2387         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2388                 memcpy(&link_type,
2389                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2390                 card->info.link_type = link_type;
2391         } else
2392                 card->info.link_type = 0;
2393         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2394         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2395         return 0;
2396 }
2397
2398 static int qeth_ulp_enable(struct qeth_card *card)
2399 {
2400         int rc;
2401         char prot_type;
2402         struct qeth_cmd_buffer *iob;
2403
2404         /*FIXME: trace view callbacks*/
2405         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2406
2407         iob = qeth_wait_for_buffer(&card->write);
2408         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2409
2410         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2411                 (__u8) card->info.portno;
2412         if (card->options.layer2)
2413                 if (card->info.type == QETH_CARD_TYPE_OSN)
2414                         prot_type = QETH_PROT_OSN2;
2415                 else
2416                         prot_type = QETH_PROT_LAYER2;
2417         else
2418                 prot_type = QETH_PROT_TCPIP;
2419
2420         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2421         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2422                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2423         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2424                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2425         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2426                                     qeth_ulp_enable_cb, NULL);
2427         return rc;
2428
2429 }
2430
2431 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2432                 unsigned long data)
2433 {
2434         struct qeth_cmd_buffer *iob;
2435
2436         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2437
2438         iob = (struct qeth_cmd_buffer *) data;
2439         memcpy(&card->token.ulp_connection_r,
2440                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2441                QETH_MPC_TOKEN_LENGTH);
2442         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2443                      3)) {
2444                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2445                 dev_err(&card->gdev->dev, "A connection could not be "
2446                         "established because of an OLM limit\n");
2447                 iob->rc = -EMLINK;
2448         }
2449         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2450         return 0;
2451 }
2452
2453 static int qeth_ulp_setup(struct qeth_card *card)
2454 {
2455         int rc;
2456         __u16 temp;
2457         struct qeth_cmd_buffer *iob;
2458         struct ccw_dev_id dev_id;
2459
2460         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2461
2462         iob = qeth_wait_for_buffer(&card->write);
2463         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2464
2465         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2466                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2467         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2468                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2469         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2470                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2471
2472         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2473         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2474         temp = (card->info.cula << 8) + card->info.unit_addr2;
2475         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2476         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2477                                     qeth_ulp_setup_cb, NULL);
2478         return rc;
2479 }
2480
2481 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2482 {
2483         int rc;
2484         struct qeth_qdio_out_buffer *newbuf;
2485
2486         rc = 0;
2487         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2488         if (!newbuf) {
2489                 rc = -ENOMEM;
2490                 goto out;
2491         }
2492         newbuf->buffer = q->qdio_bufs[bidx];
2493         skb_queue_head_init(&newbuf->skb_list);
2494         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2495         newbuf->q = q;
2496         newbuf->aob = NULL;
2497         newbuf->next_pending = q->bufs[bidx];
2498         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2499         q->bufs[bidx] = newbuf;
2500         if (q->bufstates) {
2501                 q->bufstates[bidx].user = newbuf;
2502                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2503                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2504                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2505                                 (long) newbuf->next_pending);
2506         }
2507 out:
2508         return rc;
2509 }
2510
2511 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2512 {
2513         if (!q)
2514                 return;
2515
2516         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2517         kfree(q);
2518 }
2519
2520 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2521 {
2522         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2523
2524         if (!q)
2525                 return NULL;
2526
2527         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2528                 kfree(q);
2529                 return NULL;
2530         }
2531         return q;
2532 }
2533
2534 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2535 {
2536         int i, j;
2537
2538         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2539
2540         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2541                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2542                 return 0;
2543
2544         QETH_DBF_TEXT(SETUP, 2, "inq");
2545         card->qdio.in_q = qeth_alloc_qdio_queue();
2546         if (!card->qdio.in_q)
2547                 goto out_nomem;
2548
2549         /* inbound buffer pool */
2550         if (qeth_alloc_buffer_pool(card))
2551                 goto out_freeinq;
2552
2553         /* outbound */
2554         card->qdio.out_qs =
2555                 kzalloc(card->qdio.no_out_queues *
2556                         sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
2557         if (!card->qdio.out_qs)
2558                 goto out_freepool;
2559         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2560                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2561                 if (!card->qdio.out_qs[i])
2562                         goto out_freeoutq;
2563                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2564                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2565                 card->qdio.out_qs[i]->queue_no = i;
2566                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2567                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2568                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2569                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2570                                 goto out_freeoutqbufs;
2571                 }
2572         }
2573
2574         /* completion */
2575         if (qeth_alloc_cq(card))
2576                 goto out_freeoutq;
2577
2578         return 0;
2579
2580 out_freeoutqbufs:
2581         while (j > 0) {
2582                 --j;
2583                 kmem_cache_free(qeth_qdio_outbuf_cache,
2584                                 card->qdio.out_qs[i]->bufs[j]);
2585                 card->qdio.out_qs[i]->bufs[j] = NULL;
2586         }
2587 out_freeoutq:
2588         while (i > 0) {
2589                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2590                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2591         }
2592         kfree(card->qdio.out_qs);
2593         card->qdio.out_qs = NULL;
2594 out_freepool:
2595         qeth_free_buffer_pool(card);
2596 out_freeinq:
2597         qeth_free_qdio_queue(card->qdio.in_q);
2598         card->qdio.in_q = NULL;
2599 out_nomem:
2600         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2601         return -ENOMEM;
2602 }
2603
2604 static void qeth_free_qdio_buffers(struct qeth_card *card)
2605 {
2606         int i, j;
2607
2608         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2609                 QETH_QDIO_UNINITIALIZED)
2610                 return;
2611
2612         qeth_free_cq(card);
2613         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2614         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2615                 if (card->qdio.in_q->bufs[j].rx_skb)
2616                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2617         }
2618         qeth_free_qdio_queue(card->qdio.in_q);
2619         card->qdio.in_q = NULL;
2620         /* inbound buffer pool */
2621         qeth_free_buffer_pool(card);
2622         /* free outbound qdio_qs */
2623         if (card->qdio.out_qs) {
2624                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2625                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2626                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2627                 }
2628                 kfree(card->qdio.out_qs);
2629                 card->qdio.out_qs = NULL;
2630         }
2631 }
2632
2633 static void qeth_create_qib_param_field(struct qeth_card *card,
2634                 char *param_field)
2635 {
2636
2637         param_field[0] = _ascebc['P'];
2638         param_field[1] = _ascebc['C'];
2639         param_field[2] = _ascebc['I'];
2640         param_field[3] = _ascebc['T'];
2641         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2642         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2643         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2644 }
2645
2646 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2647                 char *param_field)
2648 {
2649         param_field[16] = _ascebc['B'];
2650         param_field[17] = _ascebc['L'];
2651         param_field[18] = _ascebc['K'];
2652         param_field[19] = _ascebc['T'];
2653         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2654         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2655         *((unsigned int *) (&param_field[28])) =
2656                 card->info.blkt.inter_packet_jumbo;
2657 }
2658
2659 static int qeth_qdio_activate(struct qeth_card *card)
2660 {
2661         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2662         return qdio_activate(CARD_DDEV(card));
2663 }
2664
2665 static int qeth_dm_act(struct qeth_card *card)
2666 {
2667         int rc;
2668         struct qeth_cmd_buffer *iob;
2669
2670         QETH_DBF_TEXT(SETUP, 2, "dmact");
2671
2672         iob = qeth_wait_for_buffer(&card->write);
2673         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2674
2675         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2676                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2677         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2678                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2679         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2680         return rc;
2681 }
2682
2683 static int qeth_mpc_initialize(struct qeth_card *card)
2684 {
2685         int rc;
2686
2687         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2688
2689         rc = qeth_issue_next_read(card);
2690         if (rc) {
2691                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2692                 return rc;
2693         }
2694         rc = qeth_cm_enable(card);
2695         if (rc) {
2696                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2697                 goto out_qdio;
2698         }
2699         rc = qeth_cm_setup(card);
2700         if (rc) {
2701                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2702                 goto out_qdio;
2703         }
2704         rc = qeth_ulp_enable(card);
2705         if (rc) {
2706                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2707                 goto out_qdio;
2708         }
2709         rc = qeth_ulp_setup(card);
2710         if (rc) {
2711                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2712                 goto out_qdio;
2713         }
2714         rc = qeth_alloc_qdio_buffers(card);
2715         if (rc) {
2716                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2717                 goto out_qdio;
2718         }
2719         rc = qeth_qdio_establish(card);
2720         if (rc) {
2721                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2722                 qeth_free_qdio_buffers(card);
2723                 goto out_qdio;
2724         }
2725         rc = qeth_qdio_activate(card);
2726         if (rc) {
2727                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2728                 goto out_qdio;
2729         }
2730         rc = qeth_dm_act(card);
2731         if (rc) {
2732                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2733                 goto out_qdio;
2734         }
2735
2736         return 0;
2737 out_qdio:
2738         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2739         qdio_free(CARD_DDEV(card));
2740         return rc;
2741 }
2742
2743 void qeth_print_status_message(struct qeth_card *card)
2744 {
2745         switch (card->info.type) {
2746         case QETH_CARD_TYPE_OSD:
2747         case QETH_CARD_TYPE_OSM:
2748         case QETH_CARD_TYPE_OSX:
2749                 /* VM will use a non-zero first character
2750                  * to indicate a HiperSockets like reporting
2751                  * of the level OSA sets the first character to zero
2752                  * */
2753                 if (!card->info.mcl_level[0]) {
2754                         sprintf(card->info.mcl_level, "%02x%02x",
2755                                 card->info.mcl_level[2],
2756                                 card->info.mcl_level[3]);
2757                         break;
2758                 }
2759                 /* fallthrough */
2760         case QETH_CARD_TYPE_IQD:
2761                 if ((card->info.guestlan) ||
2762                     (card->info.mcl_level[0] & 0x80)) {
2763                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2764                                 card->info.mcl_level[0]];
2765                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2766                                 card->info.mcl_level[1]];
2767                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2768                                 card->info.mcl_level[2]];
2769                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2770                                 card->info.mcl_level[3]];
2771                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2772                 }
2773                 break;
2774         default:
2775                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2776         }
2777         dev_info(&card->gdev->dev,
2778                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2779                  qeth_get_cardname(card),
2780                  (card->info.mcl_level[0]) ? " (level: " : "",
2781                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2782                  (card->info.mcl_level[0]) ? ")" : "",
2783                  qeth_get_cardname_short(card));
2784 }
2785 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2786
2787 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2788 {
2789         struct qeth_buffer_pool_entry *entry;
2790
2791         QETH_CARD_TEXT(card, 5, "inwrklst");
2792
2793         list_for_each_entry(entry,
2794                             &card->qdio.init_pool.entry_list, init_list) {
2795                 qeth_put_buffer_pool_entry(card, entry);
2796         }
2797 }
2798
2799 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2800                                         struct qeth_card *card)
2801 {
2802         struct list_head *plh;
2803         struct qeth_buffer_pool_entry *entry;
2804         int i, free;
2805         struct page *page;
2806
2807         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2808                 return NULL;
2809
2810         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2811                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2812                 free = 1;
2813                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2814                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2815                                 free = 0;
2816                                 break;
2817                         }
2818                 }
2819                 if (free) {
2820                         list_del_init(&entry->list);
2821                         return entry;
2822                 }
2823         }
2824
2825         /* no free buffer in pool so take first one and swap pages */
2826         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2827                         struct qeth_buffer_pool_entry, list);
2828         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2829                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2830                         page = alloc_page(GFP_ATOMIC);
2831                         if (!page) {
2832                                 return NULL;
2833                         } else {
2834                                 free_page((unsigned long)entry->elements[i]);
2835                                 entry->elements[i] = page_address(page);
2836                                 if (card->options.performance_stats)
2837                                         card->perf_stats.sg_alloc_page_rx++;
2838                         }
2839                 }
2840         }
2841         list_del_init(&entry->list);
2842         return entry;
2843 }
2844
2845 static int qeth_init_input_buffer(struct qeth_card *card,
2846                 struct qeth_qdio_buffer *buf)
2847 {
2848         struct qeth_buffer_pool_entry *pool_entry;
2849         int i;
2850
2851         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2852                 buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
2853                 if (!buf->rx_skb)
2854                         return 1;
2855         }
2856
2857         pool_entry = qeth_find_free_buffer_pool_entry(card);
2858         if (!pool_entry)
2859                 return 1;
2860
2861         /*
2862          * since the buffer is accessed only from the input_tasklet
2863          * there shouldn't be a need to synchronize; also, since we use
2864          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2865          * buffers
2866          */
2867
2868         buf->pool_entry = pool_entry;
2869         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2870                 buf->buffer->element[i].length = PAGE_SIZE;
2871                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2872                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2873                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2874                 else
2875                         buf->buffer->element[i].eflags = 0;
2876                 buf->buffer->element[i].sflags = 0;
2877         }
2878         return 0;
2879 }
2880
2881 int qeth_init_qdio_queues(struct qeth_card *card)
2882 {
2883         int i, j;
2884         int rc;
2885
2886         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2887
2888         /* inbound queue */
2889         qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
2890                            QDIO_MAX_BUFFERS_PER_Q);
2891         qeth_initialize_working_pool_list(card);
2892         /*give only as many buffers to hardware as we have buffer pool entries*/
2893         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2894                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2895         card->qdio.in_q->next_buf_to_init =
2896                 card->qdio.in_buf_pool.buf_count - 1;
2897         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2898                      card->qdio.in_buf_pool.buf_count - 1);
2899         if (rc) {
2900                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2901                 return rc;
2902         }
2903
2904         /* completion */
2905         rc = qeth_cq_init(card);
2906         if (rc) {
2907                 return rc;
2908         }
2909
2910         /* outbound queue */
2911         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2912                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2913                                    QDIO_MAX_BUFFERS_PER_Q);
2914                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2915                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2916                                         card->qdio.out_qs[i]->bufs[j],
2917                                         QETH_QDIO_BUF_EMPTY);
2918                 }
2919                 card->qdio.out_qs[i]->card = card;
2920                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2921                 card->qdio.out_qs[i]->do_pack = 0;
2922                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2923                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2924                 atomic_set(&card->qdio.out_qs[i]->state,
2925                            QETH_OUT_Q_UNLOCKED);
2926         }
2927         return 0;
2928 }
2929 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2930
2931 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2932 {
2933         switch (link_type) {
2934         case QETH_LINK_TYPE_HSTR:
2935                 return 2;
2936         default:
2937                 return 1;
2938         }
2939 }
2940
2941 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2942                 struct qeth_ipa_cmd *cmd, __u8 command,
2943                 enum qeth_prot_versions prot)
2944 {
2945         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2946         cmd->hdr.command = command;
2947         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2948         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2949         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2950         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2951         if (card->options.layer2)
2952                 cmd->hdr.prim_version_no = 2;
2953         else
2954                 cmd->hdr.prim_version_no = 1;
2955         cmd->hdr.param_count = 1;
2956         cmd->hdr.prot_version = prot;
2957         cmd->hdr.ipa_supported = 0;
2958         cmd->hdr.ipa_enabled = 0;
2959 }
2960
2961 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2962                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2963 {
2964         struct qeth_cmd_buffer *iob;
2965         struct qeth_ipa_cmd *cmd;
2966
2967         iob = qeth_get_buffer(&card->write);
2968         if (iob) {
2969                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2970                 qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
2971         } else {
2972                 dev_warn(&card->gdev->dev,
2973                          "The qeth driver ran out of channel command buffers\n");
2974                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2975                                  dev_name(&card->gdev->dev));
2976         }
2977
2978         return iob;
2979 }
2980 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2981
2982 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2983                 char prot_type)
2984 {
2985         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2986         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2987         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2988                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2989 }
2990 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2991
2992 /**
2993  * qeth_send_ipa_cmd() - send an IPA command
2994  *
2995  * See qeth_send_control_data() for explanation of the arguments.
2996  */
2997
2998 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2999                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3000                         unsigned long),
3001                 void *reply_param)
3002 {
3003         int rc;
3004         char prot_type;
3005
3006         QETH_CARD_TEXT(card, 4, "sendipa");
3007
3008         if (card->options.layer2)
3009                 if (card->info.type == QETH_CARD_TYPE_OSN)
3010                         prot_type = QETH_PROT_OSN2;
3011                 else
3012                         prot_type = QETH_PROT_LAYER2;
3013         else
3014                 prot_type = QETH_PROT_TCPIP;
3015         qeth_prepare_ipa_cmd(card, iob, prot_type);
3016         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
3017                                                 iob, reply_cb, reply_param);
3018         if (rc == -ETIME) {
3019                 qeth_clear_ipacmd_list(card);
3020                 qeth_schedule_recovery(card);
3021         }
3022         return rc;
3023 }
3024 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3025
3026 static int qeth_send_startlan(struct qeth_card *card)
3027 {
3028         int rc;
3029         struct qeth_cmd_buffer *iob;
3030
3031         QETH_DBF_TEXT(SETUP, 2, "strtlan");
3032
3033         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
3034         if (!iob)
3035                 return -ENOMEM;
3036         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
3037         return rc;
3038 }
3039
3040 static int qeth_default_setadapterparms_cb(struct qeth_card *card,
3041                 struct qeth_reply *reply, unsigned long data)
3042 {
3043         struct qeth_ipa_cmd *cmd;
3044
3045         QETH_CARD_TEXT(card, 4, "defadpcb");
3046
3047         cmd = (struct qeth_ipa_cmd *) data;
3048         if (cmd->hdr.return_code == 0)
3049                 cmd->hdr.return_code =
3050                         cmd->data.setadapterparms.hdr.return_code;
3051         return 0;
3052 }
3053
3054 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3055                 struct qeth_reply *reply, unsigned long data)
3056 {
3057         struct qeth_ipa_cmd *cmd;
3058
3059         QETH_CARD_TEXT(card, 3, "quyadpcb");
3060
3061         cmd = (struct qeth_ipa_cmd *) data;
3062         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3063                 card->info.link_type =
3064                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3065                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3066         }
3067         card->options.adp.supported_funcs =
3068                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3069         return qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
3070 }
3071
3072 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3073                 __u32 command, __u32 cmdlen)
3074 {
3075         struct qeth_cmd_buffer *iob;
3076         struct qeth_ipa_cmd *cmd;
3077
3078         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3079                                      QETH_PROT_IPV4);
3080         if (iob) {
3081                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3082                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3083                 cmd->data.setadapterparms.hdr.command_code = command;
3084                 cmd->data.setadapterparms.hdr.used_total = 1;
3085                 cmd->data.setadapterparms.hdr.seq_no = 1;
3086         }
3087
3088         return iob;
3089 }
3090
3091 int qeth_query_setadapterparms(struct qeth_card *card)
3092 {
3093         int rc;
3094         struct qeth_cmd_buffer *iob;
3095
3096         QETH_CARD_TEXT(card, 3, "queryadp");
3097         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3098                                    sizeof(struct qeth_ipacmd_setadpparms));
3099         if (!iob)
3100                 return -ENOMEM;
3101         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3102         return rc;
3103 }
3104 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3105
3106 static int qeth_query_ipassists_cb(struct qeth_card *card,
3107                 struct qeth_reply *reply, unsigned long data)
3108 {
3109         struct qeth_ipa_cmd *cmd;
3110
3111         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3112
3113         cmd = (struct qeth_ipa_cmd *) data;
3114
3115         switch (cmd->hdr.return_code) {
3116         case IPA_RC_NOTSUPP:
3117         case IPA_RC_L2_UNSUPPORTED_CMD:
3118                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3119                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3120                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3121                 return -0;
3122         default:
3123                 if (cmd->hdr.return_code) {
3124                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3125                                                 "rc=%d\n",
3126                                                 dev_name(&card->gdev->dev),
3127                                                 cmd->hdr.return_code);
3128                         return 0;
3129                 }
3130         }
3131
3132         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3133                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3134                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3135         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3136                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3137                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3138         } else
3139                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3140                                         "\n", dev_name(&card->gdev->dev));
3141         return 0;
3142 }
3143
3144 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3145 {
3146         int rc;
3147         struct qeth_cmd_buffer *iob;
3148
3149         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3150         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3151         if (!iob)
3152                 return -ENOMEM;
3153         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3154         return rc;
3155 }
3156 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3157
3158 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3159                                 struct qeth_reply *reply, unsigned long data)
3160 {
3161         struct qeth_ipa_cmd *cmd;
3162         struct qeth_switch_info *sw_info;
3163         struct qeth_query_switch_attributes *attrs;
3164
3165         QETH_CARD_TEXT(card, 2, "qswiatcb");
3166         cmd = (struct qeth_ipa_cmd *) data;
3167         sw_info = (struct qeth_switch_info *)reply->param;
3168         if (cmd->data.setadapterparms.hdr.return_code == 0) {
3169                 attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3170                 sw_info->capabilities = attrs->capabilities;
3171                 sw_info->settings = attrs->settings;
3172                 QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3173                                                         sw_info->settings);
3174         }
3175         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
3176
3177         return 0;
3178 }
3179
3180 int qeth_query_switch_attributes(struct qeth_card *card,
3181                                  struct qeth_switch_info *sw_info)
3182 {
3183         struct qeth_cmd_buffer *iob;
3184
3185         QETH_CARD_TEXT(card, 2, "qswiattr");
3186         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3187                 return -EOPNOTSUPP;
3188         if (!netif_carrier_ok(card->dev))
3189                 return -ENOMEDIUM;
3190         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3191                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3192         if (!iob)
3193                 return -ENOMEM;
3194         return qeth_send_ipa_cmd(card, iob,
3195                                 qeth_query_switch_attributes_cb, sw_info);
3196 }
3197 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3198
3199 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3200                 struct qeth_reply *reply, unsigned long data)
3201 {
3202         struct qeth_ipa_cmd *cmd;
3203         __u16 rc;
3204
3205         cmd = (struct qeth_ipa_cmd *)data;
3206         rc = cmd->hdr.return_code;
3207         if (rc)
3208                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3209         else
3210                 card->info.diagass_support = cmd->data.diagass.ext;
3211         return 0;
3212 }
3213
3214 static int qeth_query_setdiagass(struct qeth_card *card)
3215 {
3216         struct qeth_cmd_buffer *iob;
3217         struct qeth_ipa_cmd    *cmd;
3218
3219         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3220         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3221         if (!iob)
3222                 return -ENOMEM;
3223         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3224         cmd->data.diagass.subcmd_len = 16;
3225         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3226         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3227 }
3228
3229 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3230 {
3231         unsigned long info = get_zeroed_page(GFP_KERNEL);
3232         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3233         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3234         struct ccw_dev_id ccwid;
3235         int level;
3236
3237         tid->chpid = card->info.chpid;
3238         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3239         tid->ssid = ccwid.ssid;
3240         tid->devno = ccwid.devno;
3241         if (!info)
3242                 return;
3243         level = stsi(NULL, 0, 0, 0);
3244         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3245                 tid->lparnr = info222->lpar_number;
3246         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3247                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3248                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3249         }
3250         free_page(info);
3251         return;
3252 }
3253
3254 static int qeth_hw_trap_cb(struct qeth_card *card,
3255                 struct qeth_reply *reply, unsigned long data)
3256 {
3257         struct qeth_ipa_cmd *cmd;
3258         __u16 rc;
3259
3260         cmd = (struct qeth_ipa_cmd *)data;
3261         rc = cmd->hdr.return_code;
3262         if (rc)
3263                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3264         return 0;
3265 }
3266
3267 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3268 {
3269         struct qeth_cmd_buffer *iob;
3270         struct qeth_ipa_cmd *cmd;
3271
3272         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3273         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3274         if (!iob)
3275                 return -ENOMEM;
3276         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3277         cmd->data.diagass.subcmd_len = 80;
3278         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3279         cmd->data.diagass.type = 1;
3280         cmd->data.diagass.action = action;
3281         switch (action) {
3282         case QETH_DIAGS_TRAP_ARM:
3283                 cmd->data.diagass.options = 0x0003;
3284                 cmd->data.diagass.ext = 0x00010000 +
3285                         sizeof(struct qeth_trap_id);
3286                 qeth_get_trap_id(card,
3287                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3288                 break;
3289         case QETH_DIAGS_TRAP_DISARM:
3290                 cmd->data.diagass.options = 0x0001;
3291                 break;
3292         case QETH_DIAGS_TRAP_CAPTURE:
3293                 break;
3294         }
3295         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3296 }
3297 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3298
3299 static int qeth_check_qdio_errors(struct qeth_card *card,
3300                                   struct qdio_buffer *buf,
3301                                   unsigned int qdio_error,
3302                                   const char *dbftext)
3303 {
3304         if (qdio_error) {
3305                 QETH_CARD_TEXT(card, 2, dbftext);
3306                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3307                                buf->element[15].sflags);
3308                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3309                                buf->element[14].sflags);
3310                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3311                 if ((buf->element[15].sflags) == 0x12) {
3312                         card->stats.rx_dropped++;
3313                         return 0;
3314                 } else
3315                         return 1;
3316         }
3317         return 0;
3318 }
3319
3320 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3321 {
3322         struct qeth_qdio_q *queue = card->qdio.in_q;
3323         struct list_head *lh;
3324         int count;
3325         int i;
3326         int rc;
3327         int newcount = 0;
3328
3329         count = (index < queue->next_buf_to_init)?
3330                 card->qdio.in_buf_pool.buf_count -
3331                 (queue->next_buf_to_init - index) :
3332                 card->qdio.in_buf_pool.buf_count -
3333                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3334         /* only requeue at a certain threshold to avoid SIGAs */
3335         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3336                 for (i = queue->next_buf_to_init;
3337                      i < queue->next_buf_to_init + count; ++i) {
3338                         if (qeth_init_input_buffer(card,
3339                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3340                                 break;
3341                         } else {
3342                                 newcount++;
3343                         }
3344                 }
3345
3346                 if (newcount < count) {
3347                         /* we are in memory shortage so we switch back to
3348                            traditional skb allocation and drop packages */
3349                         atomic_set(&card->force_alloc_skb, 3);
3350                         count = newcount;
3351                 } else {
3352                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3353                 }
3354
3355                 if (!count) {
3356                         i = 0;
3357                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3358                                 i++;
3359                         if (i == card->qdio.in_buf_pool.buf_count) {
3360                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3361                                 card->reclaim_index = index;
3362                                 schedule_delayed_work(
3363                                         &card->buffer_reclaim_work,
3364                                         QETH_RECLAIM_WORK_TIME);
3365                         }
3366                         return;
3367                 }
3368
3369                 /*
3370                  * according to old code it should be avoided to requeue all
3371                  * 128 buffers in order to benefit from PCI avoidance.
3372                  * this function keeps at least one buffer (the buffer at
3373                  * 'index') un-requeued -> this buffer is the first buffer that
3374                  * will be requeued the next time
3375                  */
3376                 if (card->options.performance_stats) {
3377                         card->perf_stats.inbound_do_qdio_cnt++;
3378                         card->perf_stats.inbound_do_qdio_start_time =
3379                                 qeth_get_micros();
3380                 }
3381                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3382                              queue->next_buf_to_init, count);
3383                 if (card->options.performance_stats)
3384                         card->perf_stats.inbound_do_qdio_time +=
3385                                 qeth_get_micros() -
3386                                 card->perf_stats.inbound_do_qdio_start_time;
3387                 if (rc) {
3388                         QETH_CARD_TEXT(card, 2, "qinberr");
3389                 }
3390                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3391                                           QDIO_MAX_BUFFERS_PER_Q;
3392         }
3393 }
3394
3395 static void qeth_buffer_reclaim_work(struct work_struct *work)
3396 {
3397         struct qeth_card *card = container_of(work, struct qeth_card,
3398                 buffer_reclaim_work.work);
3399
3400         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3401         qeth_queue_input_buffer(card, card->reclaim_index);
3402 }
3403
3404 static void qeth_handle_send_error(struct qeth_card *card,
3405                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3406 {
3407         int sbalf15 = buffer->buffer->element[15].sflags;
3408
3409         QETH_CARD_TEXT(card, 6, "hdsnderr");
3410         if (card->info.type == QETH_CARD_TYPE_IQD) {
3411                 if (sbalf15 == 0) {
3412                         qdio_err = 0;
3413                 } else {
3414                         qdio_err = 1;
3415                 }
3416         }
3417         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3418
3419         if (!qdio_err)
3420                 return;
3421
3422         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3423                 return;
3424
3425         QETH_CARD_TEXT(card, 1, "lnkfail");
3426         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3427                        (u16)qdio_err, (u8)sbalf15);
3428 }
3429
3430 /**
3431  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3432  * @queue: queue to check for packing buffer
3433  *
3434  * Returns number of buffers that were prepared for flush.
3435  */
3436 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3437 {
3438         struct qeth_qdio_out_buffer *buffer;
3439
3440         buffer = queue->bufs[queue->next_buf_to_fill];
3441         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3442             (buffer->next_element_to_fill > 0)) {
3443                 /* it's a packing buffer */
3444                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3445                 queue->next_buf_to_fill =
3446                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3447                 return 1;
3448         }
3449         return 0;
3450 }
3451
3452 /*
3453  * Switched to packing state if the number of used buffers on a queue
3454  * reaches a certain limit.
3455  */
3456 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3457 {
3458         if (!queue->do_pack) {
3459                 if (atomic_read(&queue->used_buffers)
3460                     >= QETH_HIGH_WATERMARK_PACK){
3461                         /* switch non-PACKING -> PACKING */
3462                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3463                         if (queue->card->options.performance_stats)
3464                                 queue->card->perf_stats.sc_dp_p++;
3465                         queue->do_pack = 1;
3466                 }
3467         }
3468 }
3469
3470 /*
3471  * Switches from packing to non-packing mode. If there is a packing
3472  * buffer on the queue this buffer will be prepared to be flushed.
3473  * In that case 1 is returned to inform the caller. If no buffer
3474  * has to be flushed, zero is returned.
3475  */
3476 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3477 {
3478         if (queue->do_pack) {
3479                 if (atomic_read(&queue->used_buffers)
3480                     <= QETH_LOW_WATERMARK_PACK) {
3481                         /* switch PACKING -> non-PACKING */
3482                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3483                         if (queue->card->options.performance_stats)
3484                                 queue->card->perf_stats.sc_p_dp++;
3485                         queue->do_pack = 0;
3486                         return qeth_prep_flush_pack_buffer(queue);
3487                 }
3488         }
3489         return 0;
3490 }
3491
3492 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3493                                int count)
3494 {
3495         struct qeth_qdio_out_buffer *buf;
3496         int rc;
3497         int i;
3498         unsigned int qdio_flags;
3499
3500         for (i = index; i < index + count; ++i) {
3501                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3502                 buf = queue->bufs[bidx];
3503                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3504                                 SBAL_EFLAGS_LAST_ENTRY;
3505
3506                 if (queue->bufstates)
3507                         queue->bufstates[bidx].user = buf;
3508
3509                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3510                         continue;
3511
3512                 if (!queue->do_pack) {
3513                         if ((atomic_read(&queue->used_buffers) >=
3514                                 (QETH_HIGH_WATERMARK_PACK -
3515                                  QETH_WATERMARK_PACK_FUZZ)) &&
3516                             !atomic_read(&queue->set_pci_flags_count)) {
3517                                 /* it's likely that we'll go to packing
3518                                  * mode soon */
3519                                 atomic_inc(&queue->set_pci_flags_count);
3520                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3521                         }
3522                 } else {
3523                         if (!atomic_read(&queue->set_pci_flags_count)) {
3524                                 /*
3525                                  * there's no outstanding PCI any more, so we
3526                                  * have to request a PCI to be sure the the PCI
3527                                  * will wake at some time in the future then we
3528                                  * can flush packed buffers that might still be
3529                                  * hanging around, which can happen if no
3530                                  * further send was requested by the stack
3531                                  */
3532                                 atomic_inc(&queue->set_pci_flags_count);
3533                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3534                         }
3535                 }
3536         }
3537
3538         netif_trans_update(queue->card->dev);
3539         if (queue->card->options.performance_stats) {
3540                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3541                 queue->card->perf_stats.outbound_do_qdio_start_time =
3542                         qeth_get_micros();
3543         }
3544         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3545         if (atomic_read(&queue->set_pci_flags_count))
3546                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3547         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3548                      queue->queue_no, index, count);
3549         if (queue->card->options.performance_stats)
3550                 queue->card->perf_stats.outbound_do_qdio_time +=
3551                         qeth_get_micros() -
3552                         queue->card->perf_stats.outbound_do_qdio_start_time;
3553         atomic_add(count, &queue->used_buffers);
3554         if (rc) {
3555                 queue->card->stats.tx_errors += count;
3556                 /* ignore temporary SIGA errors without busy condition */
3557                 if (rc == -ENOBUFS)
3558                         return;
3559                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3560                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3561                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3562                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3563                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3564
3565                 /* this must not happen under normal circumstances. if it
3566                  * happens something is really wrong -> recover */
3567                 qeth_schedule_recovery(queue->card);
3568                 return;
3569         }
3570         if (queue->card->options.performance_stats)
3571                 queue->card->perf_stats.bufs_sent += count;
3572 }
3573
3574 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3575 {
3576         int index;
3577         int flush_cnt = 0;
3578         int q_was_packing = 0;
3579
3580         /*
3581          * check if weed have to switch to non-packing mode or if
3582          * we have to get a pci flag out on the queue
3583          */
3584         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3585             !atomic_read(&queue->set_pci_flags_count)) {
3586                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3587                                 QETH_OUT_Q_UNLOCKED) {
3588                         /*
3589                          * If we get in here, there was no action in
3590                          * do_send_packet. So, we check if there is a
3591                          * packing buffer to be flushed here.
3592                          */
3593                         netif_stop_queue(queue->card->dev);
3594                         index = queue->next_buf_to_fill;
3595                         q_was_packing = queue->do_pack;
3596                         /* queue->do_pack may change */
3597                         barrier();
3598                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3599                         if (!flush_cnt &&
3600                             !atomic_read(&queue->set_pci_flags_count))
3601                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3602                         if (queue->card->options.performance_stats &&
3603                             q_was_packing)
3604                                 queue->card->perf_stats.bufs_sent_pack +=
3605                                         flush_cnt;
3606                         if (flush_cnt)
3607                                 qeth_flush_buffers(queue, index, flush_cnt);
3608                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3609                 }
3610         }
3611 }
3612
3613 void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3614                 unsigned long card_ptr)
3615 {
3616         struct qeth_card *card = (struct qeth_card *)card_ptr;
3617
3618         if (card->dev && (card->dev->flags & IFF_UP))
3619                 napi_schedule(&card->napi);
3620 }
3621 EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
3622
3623 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3624 {
3625         int rc;
3626
3627         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3628                 rc = -1;
3629                 goto out;
3630         } else {
3631                 if (card->options.cq == cq) {
3632                         rc = 0;
3633                         goto out;
3634                 }
3635
3636                 if (card->state != CARD_STATE_DOWN &&
3637                     card->state != CARD_STATE_RECOVER) {
3638                         rc = -1;
3639                         goto out;
3640                 }
3641
3642                 qeth_free_qdio_buffers(card);
3643                 card->options.cq = cq;
3644                 rc = 0;
3645         }
3646 out:
3647         return rc;
3648
3649 }
3650 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3651
3652
3653 static void qeth_qdio_cq_handler(struct qeth_card *card,
3654                 unsigned int qdio_err,
3655                 unsigned int queue, int first_element, int count) {
3656         struct qeth_qdio_q *cq = card->qdio.c_q;
3657         int i;
3658         int rc;
3659
3660         if (!qeth_is_cq(card, queue))
3661                 goto out;
3662
3663         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3664         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3665         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3666
3667         if (qdio_err) {
3668                 netif_stop_queue(card->dev);
3669                 qeth_schedule_recovery(card);
3670                 goto out;
3671         }
3672
3673         if (card->options.performance_stats) {
3674                 card->perf_stats.cq_cnt++;
3675                 card->perf_stats.cq_start_time = qeth_get_micros();
3676         }
3677
3678         for (i = first_element; i < first_element + count; ++i) {
3679                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3680                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3681                 int e;
3682
3683                 e = 0;
3684                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3685                        buffer->element[e].addr) {
3686                         unsigned long phys_aob_addr;
3687
3688                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3689                         qeth_qdio_handle_aob(card, phys_aob_addr);
3690                         buffer->element[e].addr = NULL;
3691                         buffer->element[e].eflags = 0;
3692                         buffer->element[e].sflags = 0;
3693                         buffer->element[e].length = 0;
3694
3695                         ++e;
3696                 }
3697
3698                 buffer->element[15].eflags = 0;
3699                 buffer->element[15].sflags = 0;
3700         }
3701         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3702                     card->qdio.c_q->next_buf_to_init,
3703                     count);
3704         if (rc) {
3705                 dev_warn(&card->gdev->dev,
3706                         "QDIO reported an error, rc=%i\n", rc);
3707                 QETH_CARD_TEXT(card, 2, "qcqherr");
3708         }
3709         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3710                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3711
3712         netif_wake_queue(card->dev);
3713
3714         if (card->options.performance_stats) {
3715                 int delta_t = qeth_get_micros();
3716                 delta_t -= card->perf_stats.cq_start_time;
3717                 card->perf_stats.cq_time += delta_t;
3718         }
3719 out:
3720         return;
3721 }
3722
3723 void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
3724                 unsigned int queue, int first_elem, int count,
3725                 unsigned long card_ptr)
3726 {
3727         struct qeth_card *card = (struct qeth_card *)card_ptr;
3728
3729         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3730         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3731
3732         if (qeth_is_cq(card, queue))
3733                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3734         else if (qdio_err)
3735                 qeth_schedule_recovery(card);
3736
3737
3738 }
3739 EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
3740
3741 void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3742                 unsigned int qdio_error, int __queue, int first_element,
3743                 int count, unsigned long card_ptr)
3744 {
3745         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3746         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3747         struct qeth_qdio_out_buffer *buffer;
3748         int i;
3749
3750         QETH_CARD_TEXT(card, 6, "qdouhdl");
3751         if (qdio_error & QDIO_ERROR_FATAL) {
3752                 QETH_CARD_TEXT(card, 2, "achkcond");
3753                 netif_stop_queue(card->dev);
3754                 qeth_schedule_recovery(card);
3755                 return;
3756         }
3757         if (card->options.performance_stats) {
3758                 card->perf_stats.outbound_handler_cnt++;
3759                 card->perf_stats.outbound_handler_start_time =
3760                         qeth_get_micros();
3761         }
3762         for (i = first_element; i < (first_element + count); ++i) {
3763                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3764                 buffer = queue->bufs[bidx];
3765                 qeth_handle_send_error(card, buffer, qdio_error);
3766
3767                 if (queue->bufstates &&
3768                     (queue->bufstates[bidx].flags &
3769                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3770                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3771
3772                         if (atomic_cmpxchg(&buffer->state,
3773                                            QETH_QDIO_BUF_PRIMED,
3774                                            QETH_QDIO_BUF_PENDING) ==
3775                                 QETH_QDIO_BUF_PRIMED) {
3776                                 qeth_notify_skbs(queue, buffer,
3777                                                  TX_NOTIFY_PENDING);
3778                         }
3779                         buffer->aob = queue->bufstates[bidx].aob;
3780                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3781                         QETH_CARD_TEXT(queue->card, 5, "aob");
3782                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3783                                         virt_to_phys(buffer->aob));
3784                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3785                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3786                                 qeth_schedule_recovery(card);
3787                         }
3788                 } else {
3789                         if (card->options.cq == QETH_CQ_ENABLED) {
3790                                 enum iucv_tx_notify n;
3791
3792                                 n = qeth_compute_cq_notification(
3793                                         buffer->buffer->element[15].sflags, 0);
3794                                 qeth_notify_skbs(queue, buffer, n);
3795                         }
3796
3797                         qeth_clear_output_buffer(queue, buffer,
3798                                                 QETH_QDIO_BUF_EMPTY);
3799                 }
3800                 qeth_cleanup_handled_pending(queue, bidx, 0);
3801         }
3802         atomic_sub(count, &queue->used_buffers);
3803         /* check if we need to do something on this outbound queue */
3804         if (card->info.type != QETH_CARD_TYPE_IQD)
3805                 qeth_check_outbound_queue(queue);
3806
3807         netif_wake_queue(queue->card->dev);
3808         if (card->options.performance_stats)
3809                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3810                         card->perf_stats.outbound_handler_start_time;
3811 }
3812 EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
3813
3814 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3815 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3816 {
3817         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3818                 return 2;
3819         return queue_num;
3820 }
3821
3822 /**
3823  * Note: Function assumes that we have 4 outbound queues.
3824  */
3825 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3826                         int ipv, int cast_type)
3827 {
3828         __be16 *tci;
3829         u8 tos;
3830
3831         if (cast_type && card->info.is_multicast_different)
3832                 return card->info.is_multicast_different &
3833                         (card->qdio.no_out_queues - 1);
3834
3835         switch (card->qdio.do_prio_queueing) {
3836         case QETH_PRIO_Q_ING_TOS:
3837         case QETH_PRIO_Q_ING_PREC:
3838                 switch (ipv) {
3839                 case 4:
3840                         tos = ipv4_get_dsfield(ip_hdr(skb));
3841                         break;
3842                 case 6:
3843                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3844                         break;
3845                 default:
3846                         return card->qdio.default_out_queue;
3847                 }
3848                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3849                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3850                 if (tos & IPTOS_MINCOST)
3851                         return qeth_cut_iqd_prio(card, 3);
3852                 if (tos & IPTOS_RELIABILITY)
3853                         return 2;
3854                 if (tos & IPTOS_THROUGHPUT)
3855                         return 1;
3856                 if (tos & IPTOS_LOWDELAY)
3857                         return 0;
3858                 break;
3859         case QETH_PRIO_Q_ING_SKB:
3860                 if (skb->priority > 5)
3861                         return 0;
3862                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3863         case QETH_PRIO_Q_ING_VLAN:
3864                 tci = &((struct ethhdr *)skb->data)->h_proto;
3865                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3866                         return qeth_cut_iqd_prio(card,
3867                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3868                 break;
3869         default:
3870                 break;
3871         }
3872         return card->qdio.default_out_queue;
3873 }
3874 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3875
3876 /**
3877  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3878  * @skb:                                SKB address
3879  *
3880  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3881  * fragmented part of the SKB. Returns zero for linear SKB.
3882  */
3883 int qeth_get_elements_for_frags(struct sk_buff *skb)
3884 {
3885         int cnt, elements = 0;
3886
3887         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3888                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3889
3890                 elements += qeth_get_elements_for_range(
3891                         (addr_t)skb_frag_address(frag),
3892                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3893         }
3894         return elements;
3895 }
3896 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3897
3898 /**
3899  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3900  * @card:                       qeth card structure, to check max. elems.
3901  * @skb:                        SKB address
3902  * @extra_elems:                extra elems needed, to check against max.
3903  * @data_offset:                range starts at skb->data + data_offset
3904  *
3905  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3906  * skb data, including linear part and fragments. Checks if the result plus
3907  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3908  * Note: extra_elems is not included in the returned result.
3909  */
3910 int qeth_get_elements_no(struct qeth_card *card,
3911                      struct sk_buff *skb, int extra_elems, int data_offset)
3912 {
3913         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3914         int elements = qeth_get_elements_for_frags(skb);
3915         addr_t start = (addr_t)skb->data + data_offset;
3916
3917         if (start != end)
3918                 elements += qeth_get_elements_for_range(start, end);
3919
3920         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3921                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3922                         "(Number=%d / Length=%d). Discarded.\n",
3923                         elements + extra_elems, skb->len);
3924                 return 0;
3925         }
3926         return elements;
3927 }
3928 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3929
3930 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3931 {
3932         int hroom, inpage, rest;
3933
3934         if (((unsigned long)skb->data & PAGE_MASK) !=
3935             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3936                 hroom = skb_headroom(skb);
3937                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3938                 rest = len - inpage;
3939                 if (rest > hroom)
3940                         return 1;
3941                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3942                 skb->data -= rest;
3943                 skb->tail -= rest;
3944                 *hdr = (struct qeth_hdr *)skb->data;
3945                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3946         }
3947         return 0;
3948 }
3949 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3950
3951 /**
3952  * qeth_push_hdr() - push a qeth_hdr onto an skb.
3953  * @skb: skb that the qeth_hdr should be pushed onto.
3954  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3955  *       it contains a valid pointer to a qeth_hdr.
3956  * @len: length of the hdr that needs to be pushed on.
3957  *
3958  * Returns the pushed length. If the header can't be pushed on
3959  * (eg. because it would cross a page boundary), it is allocated from
3960  * the cache instead and 0 is returned.
3961  * Error to create the hdr is indicated by returning with < 0.
3962  */
3963 int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
3964 {
3965         if (skb_headroom(skb) >= len &&
3966             qeth_get_elements_for_range((addr_t)skb->data - len,
3967                                         (addr_t)skb->data) == 1) {
3968                 *hdr = skb_push(skb, len);
3969                 return len;
3970         }
3971         /* fall back */
3972         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3973         if (!*hdr)
3974                 return -ENOMEM;
3975         return 0;
3976 }
3977 EXPORT_SYMBOL_GPL(qeth_push_hdr);
3978
3979 static void __qeth_fill_buffer(struct sk_buff *skb,
3980                                struct qeth_qdio_out_buffer *buf,
3981                                bool is_first_elem, unsigned int offset)
3982 {
3983         struct qdio_buffer *buffer = buf->buffer;
3984         int element = buf->next_element_to_fill;
3985         int length = skb_headlen(skb) - offset;
3986         char *data = skb->data + offset;
3987         int length_here, cnt;
3988
3989         /* map linear part into buffer element(s) */
3990         while (length > 0) {
3991                 /* length_here is the remaining amount of data in this page */
3992                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3993                 if (length < length_here)
3994                         length_here = length;
3995
3996                 buffer->element[element].addr = data;
3997                 buffer->element[element].length = length_here;
3998                 length -= length_here;
3999                 if (is_first_elem) {
4000                         is_first_elem = false;
4001                         if (length || skb_is_nonlinear(skb))
4002                                 /* skb needs additional elements */
4003                                 buffer->element[element].eflags =
4004                                         SBAL_EFLAGS_FIRST_FRAG;
4005                         else
4006                                 buffer->element[element].eflags = 0;
4007                 } else {
4008                         buffer->element[element].eflags =
4009                                 SBAL_EFLAGS_MIDDLE_FRAG;
4010                 }
4011                 data += length_here;
4012                 element++;
4013         }
4014
4015         /* map page frags into buffer element(s) */
4016         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4017                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4018
4019                 data = skb_frag_address(frag);
4020                 length = skb_frag_size(frag);
4021                 while (length > 0) {
4022                         length_here = PAGE_SIZE -
4023                                 ((unsigned long) data % PAGE_SIZE);
4024                         if (length < length_here)
4025                                 length_here = length;
4026
4027                         buffer->element[element].addr = data;
4028                         buffer->element[element].length = length_here;
4029                         buffer->element[element].eflags =
4030                                 SBAL_EFLAGS_MIDDLE_FRAG;
4031                         length -= length_here;
4032                         data += length_here;
4033                         element++;
4034                 }
4035         }
4036
4037         if (buffer->element[element - 1].eflags)
4038                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4039         buf->next_element_to_fill = element;
4040 }
4041
4042 /**
4043  * qeth_fill_buffer() - map skb into an output buffer
4044  * @queue:      QDIO queue to submit the buffer on
4045  * @buf:        buffer to transport the skb
4046  * @skb:        skb to map into the buffer
4047  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4048  *              from qeth_core_header_cache.
4049  * @offset:     when mapping the skb, start at skb->data + offset
4050  * @hd_len:     if > 0, build a dedicated header element of this size
4051  */
4052 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4053                             struct qeth_qdio_out_buffer *buf,
4054                             struct sk_buff *skb, struct qeth_hdr *hdr,
4055                             unsigned int offset, unsigned int hd_len)
4056 {
4057         struct qdio_buffer *buffer = buf->buffer;
4058         bool is_first_elem = true;
4059         int flush_cnt = 0;
4060
4061         refcount_inc(&skb->users);
4062         skb_queue_tail(&buf->skb_list, skb);
4063
4064         /* build dedicated header element */
4065         if (hd_len) {
4066                 int element = buf->next_element_to_fill;
4067                 is_first_elem = false;
4068
4069                 buffer->element[element].addr = hdr;
4070                 buffer->element[element].length = hd_len;
4071                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4072                 /* remember to free cache-allocated qeth_hdr: */
4073                 buf->is_header[element] = ((void *)hdr != skb->data);
4074                 buf->next_element_to_fill++;
4075         }
4076
4077         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4078
4079         if (!queue->do_pack) {
4080                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4081                 /* set state to PRIMED -> will be flushed */
4082                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4083                 flush_cnt = 1;
4084         } else {
4085                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4086                 if (queue->card->options.performance_stats)
4087                         queue->card->perf_stats.skbs_sent_pack++;
4088                 if (buf->next_element_to_fill >=
4089                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4090                         /*
4091                          * packed buffer if full -> set state PRIMED
4092                          * -> will be flushed
4093                          */
4094                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4095                         flush_cnt = 1;
4096                 }
4097         }
4098         return flush_cnt;
4099 }
4100
4101 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4102                              struct qeth_hdr *hdr, unsigned int offset,
4103                              unsigned int hd_len)
4104 {
4105         int index = queue->next_buf_to_fill;
4106         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
4107
4108         /*
4109          * check if buffer is empty to make sure that we do not 'overtake'
4110          * ourselves and try to fill a buffer that is already primed
4111          */
4112         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4113                 return -EBUSY;
4114         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
4115         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4116         qeth_flush_buffers(queue, index, 1);
4117         return 0;
4118 }
4119 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4120
4121 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4122                         struct sk_buff *skb, struct qeth_hdr *hdr,
4123                         unsigned int offset, unsigned int hd_len,
4124                         int elements_needed)
4125 {
4126         struct qeth_qdio_out_buffer *buffer;
4127         int start_index;
4128         int flush_count = 0;
4129         int do_pack = 0;
4130         int tmp;
4131         int rc = 0;
4132
4133         /* spin until we get the queue ... */
4134         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4135                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4136         start_index = queue->next_buf_to_fill;
4137         buffer = queue->bufs[queue->next_buf_to_fill];
4138         /*
4139          * check if buffer is empty to make sure that we do not 'overtake'
4140          * ourselves and try to fill a buffer that is already primed
4141          */
4142         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4143                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4144                 return -EBUSY;
4145         }
4146         /* check if we need to switch packing state of this queue */
4147         qeth_switch_to_packing_if_needed(queue);
4148         if (queue->do_pack) {
4149                 do_pack = 1;
4150                 /* does packet fit in current buffer? */
4151                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4152                     buffer->next_element_to_fill) < elements_needed) {
4153                         /* ... no -> set state PRIMED */
4154                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4155                         flush_count++;
4156                         queue->next_buf_to_fill =
4157                                 (queue->next_buf_to_fill + 1) %
4158                                 QDIO_MAX_BUFFERS_PER_Q;
4159                         buffer = queue->bufs[queue->next_buf_to_fill];
4160                         /* we did a step forward, so check buffer state
4161                          * again */
4162                         if (atomic_read(&buffer->state) !=
4163                             QETH_QDIO_BUF_EMPTY) {
4164                                 qeth_flush_buffers(queue, start_index,
4165                                                            flush_count);
4166                                 atomic_set(&queue->state,
4167                                                 QETH_OUT_Q_UNLOCKED);
4168                                 rc = -EBUSY;
4169                                 goto out;
4170                         }
4171                 }
4172         }
4173         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4174         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4175                                   QDIO_MAX_BUFFERS_PER_Q;
4176         flush_count += tmp;
4177         if (flush_count)
4178                 qeth_flush_buffers(queue, start_index, flush_count);
4179         else if (!atomic_read(&queue->set_pci_flags_count))
4180                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4181         /*
4182          * queue->state will go from LOCKED -> UNLOCKED or from
4183          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4184          * (switch packing state or flush buffer to get another pci flag out).
4185          * In that case we will enter this loop
4186          */
4187         while (atomic_dec_return(&queue->state)) {
4188                 start_index = queue->next_buf_to_fill;
4189                 /* check if we can go back to non-packing state */
4190                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4191                 /*
4192                  * check if we need to flush a packing buffer to get a pci
4193                  * flag out on the queue
4194                  */
4195                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4196                         tmp = qeth_prep_flush_pack_buffer(queue);
4197                 if (tmp) {
4198                         qeth_flush_buffers(queue, start_index, tmp);
4199                         flush_count += tmp;
4200                 }
4201         }
4202 out:
4203         /* at this point the queue is UNLOCKED again */
4204         if (queue->card->options.performance_stats && do_pack)
4205                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4206
4207         return rc;
4208 }
4209 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4210
4211 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4212                 struct qeth_reply *reply, unsigned long data)
4213 {
4214         struct qeth_ipa_cmd *cmd;
4215         struct qeth_ipacmd_setadpparms *setparms;
4216
4217         QETH_CARD_TEXT(card, 4, "prmadpcb");
4218
4219         cmd = (struct qeth_ipa_cmd *) data;
4220         setparms = &(cmd->data.setadapterparms);
4221
4222         qeth_default_setadapterparms_cb(card, reply, (unsigned long)cmd);
4223         if (cmd->hdr.return_code) {
4224                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4225                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4226         }
4227         card->info.promisc_mode = setparms->data.mode;
4228         return 0;
4229 }
4230
4231 void qeth_setadp_promisc_mode(struct qeth_card *card)
4232 {
4233         enum qeth_ipa_promisc_modes mode;
4234         struct net_device *dev = card->dev;
4235         struct qeth_cmd_buffer *iob;
4236         struct qeth_ipa_cmd *cmd;
4237
4238         QETH_CARD_TEXT(card, 4, "setprom");
4239
4240         if (((dev->flags & IFF_PROMISC) &&
4241              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4242             (!(dev->flags & IFF_PROMISC) &&
4243              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4244                 return;
4245         mode = SET_PROMISC_MODE_OFF;
4246         if (dev->flags & IFF_PROMISC)
4247                 mode = SET_PROMISC_MODE_ON;
4248         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4249
4250         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4251                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4252         if (!iob)
4253                 return;
4254         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
4255         cmd->data.setadapterparms.data.mode = mode;
4256         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4257 }
4258 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4259
4260 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4261 {
4262         struct qeth_card *card;
4263         char dbf_text[15];
4264
4265         card = dev->ml_priv;
4266
4267         QETH_CARD_TEXT(card, 4, "chgmtu");
4268         sprintf(dbf_text, "%8x", new_mtu);
4269         QETH_CARD_TEXT(card, 4, dbf_text);
4270
4271         if (!qeth_mtu_is_valid(card, new_mtu))
4272                 return -EINVAL;
4273         dev->mtu = new_mtu;
4274         return 0;
4275 }
4276 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4277
4278 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4279 {
4280         struct qeth_card *card;
4281
4282         card = dev->ml_priv;
4283
4284         QETH_CARD_TEXT(card, 5, "getstat");
4285
4286         return &card->stats;
4287 }
4288 EXPORT_SYMBOL_GPL(qeth_get_stats);
4289
4290 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4291                 struct qeth_reply *reply, unsigned long data)
4292 {
4293         struct qeth_ipa_cmd *cmd;
4294
4295         QETH_CARD_TEXT(card, 4, "chgmaccb");
4296
4297         cmd = (struct qeth_ipa_cmd *) data;
4298         if (!card->options.layer2 ||
4299             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4300                 ether_addr_copy(card->dev->dev_addr,
4301                                 cmd->data.setadapterparms.data.change_addr.addr);
4302                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4303         }
4304         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4305         return 0;
4306 }
4307
4308 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4309 {
4310         int rc;
4311         struct qeth_cmd_buffer *iob;
4312         struct qeth_ipa_cmd *cmd;
4313
4314         QETH_CARD_TEXT(card, 4, "chgmac");
4315
4316         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4317                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4318                                    sizeof(struct qeth_change_addr));
4319         if (!iob)
4320                 return -ENOMEM;
4321         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4322         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4323         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4324         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4325                         card->dev->dev_addr);
4326         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4327                                NULL);
4328         return rc;
4329 }
4330 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4331
4332 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4333                 struct qeth_reply *reply, unsigned long data)
4334 {
4335         struct qeth_ipa_cmd *cmd;
4336         struct qeth_set_access_ctrl *access_ctrl_req;
4337         int fallback = *(int *)reply->param;
4338
4339         QETH_CARD_TEXT(card, 4, "setaccb");
4340
4341         cmd = (struct qeth_ipa_cmd *) data;
4342         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4343         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4344         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4345         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4346                 cmd->data.setadapterparms.hdr.return_code);
4347         if (cmd->data.setadapterparms.hdr.return_code !=
4348                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4349                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4350                                 card->gdev->dev.kobj.name,
4351                                 access_ctrl_req->subcmd_code,
4352                                 cmd->data.setadapterparms.hdr.return_code);
4353         switch (cmd->data.setadapterparms.hdr.return_code) {
4354         case SET_ACCESS_CTRL_RC_SUCCESS:
4355                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4356                         dev_info(&card->gdev->dev,
4357                             "QDIO data connection isolation is deactivated\n");
4358                 } else {
4359                         dev_info(&card->gdev->dev,
4360                             "QDIO data connection isolation is activated\n");
4361                 }
4362                 break;
4363         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4364                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4365                                 "deactivated\n", dev_name(&card->gdev->dev));
4366                 if (fallback)
4367                         card->options.isolation = card->options.prev_isolation;
4368                 break;
4369         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4370                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4371                                 " activated\n", dev_name(&card->gdev->dev));
4372                 if (fallback)
4373                         card->options.isolation = card->options.prev_isolation;
4374                 break;
4375         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4376                 dev_err(&card->gdev->dev, "Adapter does not "
4377                         "support QDIO data connection isolation\n");
4378                 break;
4379         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4380                 dev_err(&card->gdev->dev,
4381                         "Adapter is dedicated. "
4382                         "QDIO data connection isolation not supported\n");
4383                 if (fallback)
4384                         card->options.isolation = card->options.prev_isolation;
4385                 break;
4386         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4387                 dev_err(&card->gdev->dev,
4388                         "TSO does not permit QDIO data connection isolation\n");
4389                 if (fallback)
4390                         card->options.isolation = card->options.prev_isolation;
4391                 break;
4392         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4393                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4394                         "support reflective relay mode\n");
4395                 if (fallback)
4396                         card->options.isolation = card->options.prev_isolation;
4397                 break;
4398         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4399                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4400                                         "enabled at the adjacent switch port");
4401                 if (fallback)
4402                         card->options.isolation = card->options.prev_isolation;
4403                 break;
4404         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4405                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4406                                         "at the adjacent switch failed\n");
4407                 break;
4408         default:
4409                 /* this should never happen */
4410                 if (fallback)
4411                         card->options.isolation = card->options.prev_isolation;
4412                 break;
4413         }
4414         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4415         return 0;
4416 }
4417
4418 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4419                 enum qeth_ipa_isolation_modes isolation, int fallback)
4420 {
4421         int rc;
4422         struct qeth_cmd_buffer *iob;
4423         struct qeth_ipa_cmd *cmd;
4424         struct qeth_set_access_ctrl *access_ctrl_req;
4425
4426         QETH_CARD_TEXT(card, 4, "setacctl");
4427
4428         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4429         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4430
4431         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4432                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4433                                    sizeof(struct qeth_set_access_ctrl));
4434         if (!iob)
4435                 return -ENOMEM;
4436         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4437         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4438         access_ctrl_req->subcmd_code = isolation;
4439
4440         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4441                                &fallback);
4442         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4443         return rc;
4444 }
4445
4446 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4447 {
4448         int rc = 0;
4449
4450         QETH_CARD_TEXT(card, 4, "setactlo");
4451
4452         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4453              card->info.type == QETH_CARD_TYPE_OSX) &&
4454              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4455                 rc = qeth_setadpparms_set_access_ctrl(card,
4456                         card->options.isolation, fallback);
4457                 if (rc) {
4458                         QETH_DBF_MESSAGE(3,
4459                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4460                                 card->gdev->dev.kobj.name,
4461                                 rc);
4462                         rc = -EOPNOTSUPP;
4463                 }
4464         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4465                 card->options.isolation = ISOLATION_MODE_NONE;
4466
4467                 dev_err(&card->gdev->dev, "Adapter does not "
4468                         "support QDIO data connection isolation\n");
4469                 rc = -EOPNOTSUPP;
4470         }
4471         return rc;
4472 }
4473 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4474
4475 void qeth_tx_timeout(struct net_device *dev)
4476 {
4477         struct qeth_card *card;
4478
4479         card = dev->ml_priv;
4480         QETH_CARD_TEXT(card, 4, "txtimeo");
4481         card->stats.tx_errors++;
4482         qeth_schedule_recovery(card);
4483 }
4484 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4485
4486 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4487 {
4488         struct qeth_card *card = dev->ml_priv;
4489         int rc = 0;
4490
4491         switch (regnum) {
4492         case MII_BMCR: /* Basic mode control register */
4493                 rc = BMCR_FULLDPLX;
4494                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4495                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4496                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4497                         rc |= BMCR_SPEED100;
4498                 break;
4499         case MII_BMSR: /* Basic mode status register */
4500                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4501                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4502                      BMSR_100BASE4;
4503                 break;
4504         case MII_PHYSID1: /* PHYS ID 1 */
4505                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4506                      dev->dev_addr[2];
4507                 rc = (rc >> 5) & 0xFFFF;
4508                 break;
4509         case MII_PHYSID2: /* PHYS ID 2 */
4510                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4511                 break;
4512         case MII_ADVERTISE: /* Advertisement control reg */
4513                 rc = ADVERTISE_ALL;
4514                 break;
4515         case MII_LPA: /* Link partner ability reg */
4516                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4517                      LPA_100BASE4 | LPA_LPACK;
4518                 break;
4519         case MII_EXPANSION: /* Expansion register */
4520                 break;
4521         case MII_DCOUNTER: /* disconnect counter */
4522                 break;
4523         case MII_FCSCOUNTER: /* false carrier counter */
4524                 break;
4525         case MII_NWAYTEST: /* N-way auto-neg test register */
4526                 break;
4527         case MII_RERRCOUNTER: /* rx error counter */
4528                 rc = card->stats.rx_errors;
4529                 break;
4530         case MII_SREVISION: /* silicon revision */
4531                 break;
4532         case MII_RESV1: /* reserved 1 */
4533                 break;
4534         case MII_LBRERROR: /* loopback, rx, bypass error */
4535                 break;
4536         case MII_PHYADDR: /* physical address */
4537                 break;
4538         case MII_RESV2: /* reserved 2 */
4539                 break;
4540         case MII_TPISTATUS: /* TPI status for 10mbps */
4541                 break;
4542         case MII_NCONFIG: /* network interface config */
4543                 break;
4544         default:
4545                 break;
4546         }
4547         return rc;
4548 }
4549
4550 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4551                 struct qeth_cmd_buffer *iob, int len,
4552                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4553                         unsigned long),
4554                 void *reply_param)
4555 {
4556         u16 s1, s2;
4557
4558         QETH_CARD_TEXT(card, 4, "sendsnmp");
4559
4560         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4561         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4562                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4563         /* adjust PDU length fields in IPA_PDU_HEADER */
4564         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4565         s2 = (u32) len;
4566         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4567         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4568         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4569         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4570         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4571                                       reply_cb, reply_param);
4572 }
4573
4574 static int qeth_snmp_command_cb(struct qeth_card *card,
4575                 struct qeth_reply *reply, unsigned long sdata)
4576 {
4577         struct qeth_ipa_cmd *cmd;
4578         struct qeth_arp_query_info *qinfo;
4579         struct qeth_snmp_cmd *snmp;
4580         unsigned char *data;
4581         __u16 data_len;
4582
4583         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4584
4585         cmd = (struct qeth_ipa_cmd *) sdata;
4586         data = (unsigned char *)((char *)cmd - reply->offset);
4587         qinfo = (struct qeth_arp_query_info *) reply->param;
4588         snmp = &cmd->data.setadapterparms.data.snmp;
4589
4590         if (cmd->hdr.return_code) {
4591                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4592                 return 0;
4593         }
4594         if (cmd->data.setadapterparms.hdr.return_code) {
4595                 cmd->hdr.return_code =
4596                         cmd->data.setadapterparms.hdr.return_code;
4597                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4598                 return 0;
4599         }
4600         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4601         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4602                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4603         else
4604                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4605
4606         /* check if there is enough room in userspace */
4607         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4608                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4609                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4610                 return 0;
4611         }
4612         QETH_CARD_TEXT_(card, 4, "snore%i",
4613                        cmd->data.setadapterparms.hdr.used_total);
4614         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4615                 cmd->data.setadapterparms.hdr.seq_no);
4616         /*copy entries to user buffer*/
4617         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4618                 memcpy(qinfo->udata + qinfo->udata_offset,
4619                        (char *)snmp,
4620                        data_len + offsetof(struct qeth_snmp_cmd, data));
4621                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4622         } else {
4623                 memcpy(qinfo->udata + qinfo->udata_offset,
4624                        (char *)&snmp->request, data_len);
4625         }
4626         qinfo->udata_offset += data_len;
4627         /* check if all replies received ... */
4628                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4629                                cmd->data.setadapterparms.hdr.used_total);
4630                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4631                                cmd->data.setadapterparms.hdr.seq_no);
4632         if (cmd->data.setadapterparms.hdr.seq_no <
4633             cmd->data.setadapterparms.hdr.used_total)
4634                 return 1;
4635         return 0;
4636 }
4637
4638 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4639 {
4640         struct qeth_cmd_buffer *iob;
4641         struct qeth_ipa_cmd *cmd;
4642         struct qeth_snmp_ureq *ureq;
4643         unsigned int req_len;
4644         struct qeth_arp_query_info qinfo = {0, };
4645         int rc = 0;
4646
4647         QETH_CARD_TEXT(card, 3, "snmpcmd");
4648
4649         if (card->info.guestlan)
4650                 return -EOPNOTSUPP;
4651
4652         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4653             (!card->options.layer2)) {
4654                 return -EOPNOTSUPP;
4655         }
4656         /* skip 4 bytes (data_len struct member) to get req_len */
4657         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4658                 return -EFAULT;
4659         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4660                        sizeof(struct qeth_ipacmd_hdr) -
4661                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4662                 return -EINVAL;
4663         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4664         if (IS_ERR(ureq)) {
4665                 QETH_CARD_TEXT(card, 2, "snmpnome");
4666                 return PTR_ERR(ureq);
4667         }
4668         qinfo.udata_len = ureq->hdr.data_len;
4669         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4670         if (!qinfo.udata) {
4671                 kfree(ureq);
4672                 return -ENOMEM;
4673         }
4674         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4675
4676         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4677                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4678         if (!iob) {
4679                 rc = -ENOMEM;
4680                 goto out;
4681         }
4682         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4683         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4684         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4685                                     qeth_snmp_command_cb, (void *)&qinfo);
4686         if (rc)
4687                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4688                            QETH_CARD_IFNAME(card), rc);
4689         else {
4690                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4691                         rc = -EFAULT;
4692         }
4693 out:
4694         kfree(ureq);
4695         kfree(qinfo.udata);
4696         return rc;
4697 }
4698
4699 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4700                 struct qeth_reply *reply, unsigned long data)
4701 {
4702         struct qeth_ipa_cmd *cmd;
4703         struct qeth_qoat_priv *priv;
4704         char *resdata;
4705         int resdatalen;
4706
4707         QETH_CARD_TEXT(card, 3, "qoatcb");
4708
4709         cmd = (struct qeth_ipa_cmd *)data;
4710         priv = (struct qeth_qoat_priv *)reply->param;
4711         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4712         resdata = (char *)data + 28;
4713
4714         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4715                 cmd->hdr.return_code = IPA_RC_FFFF;
4716                 return 0;
4717         }
4718
4719         memcpy((priv->buffer + priv->response_len), resdata,
4720                 resdatalen);
4721         priv->response_len += resdatalen;
4722
4723         if (cmd->data.setadapterparms.hdr.seq_no <
4724             cmd->data.setadapterparms.hdr.used_total)
4725                 return 1;
4726         return 0;
4727 }
4728
4729 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4730 {
4731         int rc = 0;
4732         struct qeth_cmd_buffer *iob;
4733         struct qeth_ipa_cmd *cmd;
4734         struct qeth_query_oat *oat_req;
4735         struct qeth_query_oat_data oat_data;
4736         struct qeth_qoat_priv priv;
4737         void __user *tmp;
4738
4739         QETH_CARD_TEXT(card, 3, "qoatcmd");
4740
4741         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4742                 rc = -EOPNOTSUPP;
4743                 goto out;
4744         }
4745
4746         if (copy_from_user(&oat_data, udata,
4747             sizeof(struct qeth_query_oat_data))) {
4748                         rc = -EFAULT;
4749                         goto out;
4750         }
4751
4752         priv.buffer_len = oat_data.buffer_len;
4753         priv.response_len = 0;
4754         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4755         if (!priv.buffer) {
4756                 rc = -ENOMEM;
4757                 goto out;
4758         }
4759
4760         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4761                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4762                                    sizeof(struct qeth_query_oat));
4763         if (!iob) {
4764                 rc = -ENOMEM;
4765                 goto out_free;
4766         }
4767         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4768         oat_req = &cmd->data.setadapterparms.data.query_oat;
4769         oat_req->subcmd_code = oat_data.command;
4770
4771         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4772                                &priv);
4773         if (!rc) {
4774                 if (is_compat_task())
4775                         tmp = compat_ptr(oat_data.ptr);
4776                 else
4777                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4778
4779                 if (copy_to_user(tmp, priv.buffer,
4780                     priv.response_len)) {
4781                         rc = -EFAULT;
4782                         goto out_free;
4783                 }
4784
4785                 oat_data.response_len = priv.response_len;
4786
4787                 if (copy_to_user(udata, &oat_data,
4788                     sizeof(struct qeth_query_oat_data)))
4789                         rc = -EFAULT;
4790         } else
4791                 if (rc == IPA_RC_FFFF)
4792                         rc = -EFAULT;
4793
4794 out_free:
4795         kfree(priv.buffer);
4796 out:
4797         return rc;
4798 }
4799
4800 static int qeth_query_card_info_cb(struct qeth_card *card,
4801                                    struct qeth_reply *reply, unsigned long data)
4802 {
4803         struct qeth_ipa_cmd *cmd;
4804         struct qeth_query_card_info *card_info;
4805         struct carrier_info *carrier_info;
4806
4807         QETH_CARD_TEXT(card, 2, "qcrdincb");
4808         carrier_info = (struct carrier_info *)reply->param;
4809         cmd = (struct qeth_ipa_cmd *)data;
4810         card_info = &cmd->data.setadapterparms.data.card_info;
4811         if (cmd->data.setadapterparms.hdr.return_code == 0) {
4812                 carrier_info->card_type = card_info->card_type;
4813                 carrier_info->port_mode = card_info->port_mode;
4814                 carrier_info->port_speed = card_info->port_speed;
4815         }
4816
4817         qeth_default_setadapterparms_cb(card, reply, (unsigned long) cmd);
4818         return 0;
4819 }
4820
4821 static int qeth_query_card_info(struct qeth_card *card,
4822                                 struct carrier_info *carrier_info)
4823 {
4824         struct qeth_cmd_buffer *iob;
4825
4826         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4827         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4828                 return -EOPNOTSUPP;
4829         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4830                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4831         if (!iob)
4832                 return -ENOMEM;
4833         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4834                                         (void *)carrier_info);
4835 }
4836
4837 /**
4838  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4839  * @card: pointer to a qeth_card
4840  *
4841  * Returns
4842  *      0, if a MAC address has been set for the card's netdevice
4843  *      a return code, for various error conditions
4844  */
4845 int qeth_vm_request_mac(struct qeth_card *card)
4846 {
4847         struct diag26c_mac_resp *response;
4848         struct diag26c_mac_req *request;
4849         struct ccw_dev_id id;
4850         int rc;
4851
4852         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4853
4854         if (!card->dev)
4855                 return -ENODEV;
4856
4857         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4858         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4859         if (!request || !response) {
4860                 rc = -ENOMEM;
4861                 goto out;
4862         }
4863
4864         ccw_device_get_id(CARD_DDEV(card), &id);
4865         request->resp_buf_len = sizeof(*response);
4866         request->resp_version = DIAG26C_VERSION2;
4867         request->op_code = DIAG26C_GET_MAC;
4868         request->devno = id.devno;
4869
4870         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4871         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4872         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4873         if (rc)
4874                 goto out;
4875         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4876
4877         if (request->resp_buf_len < sizeof(*response) ||
4878             response->version != request->resp_version) {
4879                 rc = -EIO;
4880                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4881                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4882                              sizeof(request->resp_buf_len));
4883         } else if (!is_valid_ether_addr(response->mac)) {
4884                 rc = -EINVAL;
4885                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4886                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4887         } else {
4888                 ether_addr_copy(card->dev->dev_addr, response->mac);
4889         }
4890
4891 out:
4892         kfree(response);
4893         kfree(request);
4894         return rc;
4895 }
4896 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4897
4898 static int qeth_get_qdio_q_format(struct qeth_card *card)
4899 {
4900         if (card->info.type == QETH_CARD_TYPE_IQD)
4901                 return QDIO_IQDIO_QFMT;
4902         else
4903                 return QDIO_QETH_QFMT;
4904 }
4905
4906 static void qeth_determine_capabilities(struct qeth_card *card)
4907 {
4908         int rc;
4909         int length;
4910         char *prcd;
4911         struct ccw_device *ddev;
4912         int ddev_offline = 0;
4913
4914         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4915         ddev = CARD_DDEV(card);
4916         if (!ddev->online) {
4917                 ddev_offline = 1;
4918                 rc = ccw_device_set_online(ddev);
4919                 if (rc) {
4920                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4921                         goto out;
4922                 }
4923         }
4924
4925         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4926         if (rc) {
4927                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4928                         dev_name(&card->gdev->dev), rc);
4929                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4930                 goto out_offline;
4931         }
4932         qeth_configure_unitaddr(card, prcd);
4933         if (ddev_offline)
4934                 qeth_configure_blkt_default(card, prcd);
4935         kfree(prcd);
4936
4937         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4938         if (rc)
4939                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4940
4941         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4942         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4943         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4944         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4945         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4946         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4947             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4948             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4949                 dev_info(&card->gdev->dev,
4950                         "Completion Queueing supported\n");
4951         } else {
4952                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4953         }
4954
4955
4956 out_offline:
4957         if (ddev_offline == 1)
4958                 ccw_device_set_offline(ddev);
4959 out:
4960         return;
4961 }
4962
4963 static void qeth_qdio_establish_cq(struct qeth_card *card,
4964                                    struct qdio_buffer **in_sbal_ptrs,
4965                                    void (**queue_start_poll)
4966                                         (struct ccw_device *, int,
4967                                          unsigned long))
4968 {
4969         int i;
4970
4971         if (card->options.cq == QETH_CQ_ENABLED) {
4972                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4973                              (card->qdio.no_in_queues - 1);
4974                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4975                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4976                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4977                 }
4978
4979                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4980         }
4981 }
4982
4983 static int qeth_qdio_establish(struct qeth_card *card)
4984 {
4985         struct qdio_initialize init_data;
4986         char *qib_param_field;
4987         struct qdio_buffer **in_sbal_ptrs;
4988         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4989         struct qdio_buffer **out_sbal_ptrs;
4990         int i, j, k;
4991         int rc = 0;
4992
4993         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4994
4995         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
4996                               GFP_KERNEL);
4997         if (!qib_param_field) {
4998                 rc =  -ENOMEM;
4999                 goto out_free_nothing;
5000         }
5001
5002         qeth_create_qib_param_field(card, qib_param_field);
5003         qeth_create_qib_param_field_blkt(card, qib_param_field);
5004
5005         in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
5006                                QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
5007                                GFP_KERNEL);
5008         if (!in_sbal_ptrs) {
5009                 rc = -ENOMEM;
5010                 goto out_free_qib_param;
5011         }
5012         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
5013                 in_sbal_ptrs[i] = (struct qdio_buffer *)
5014                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
5015         }
5016
5017         queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
5018                                    GFP_KERNEL);
5019         if (!queue_start_poll) {
5020                 rc = -ENOMEM;
5021                 goto out_free_in_sbals;
5022         }
5023         for (i = 0; i < card->qdio.no_in_queues; ++i)
5024                 queue_start_poll[i] = card->discipline->start_poll;
5025
5026         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
5027
5028         out_sbal_ptrs =
5029                 kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
5030                         sizeof(void *), GFP_KERNEL);
5031         if (!out_sbal_ptrs) {
5032                 rc = -ENOMEM;
5033                 goto out_free_queue_start_poll;
5034         }
5035         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
5036                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
5037                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
5038                                 card->qdio.out_qs[i]->bufs[j]->buffer);
5039                 }
5040
5041         memset(&init_data, 0, sizeof(struct qdio_initialize));
5042         init_data.cdev                   = CARD_DDEV(card);
5043         init_data.q_format               = qeth_get_qdio_q_format(card);
5044         init_data.qib_param_field_format = 0;
5045         init_data.qib_param_field        = qib_param_field;
5046         init_data.no_input_qs            = card->qdio.no_in_queues;
5047         init_data.no_output_qs           = card->qdio.no_out_queues;
5048         init_data.input_handler          = card->discipline->input_handler;
5049         init_data.output_handler         = card->discipline->output_handler;
5050         init_data.queue_start_poll_array = queue_start_poll;
5051         init_data.int_parm               = (unsigned long) card;
5052         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
5053         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
5054         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5055         init_data.scan_threshold =
5056                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5057
5058         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5059                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5060                 rc = qdio_allocate(&init_data);
5061                 if (rc) {
5062                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5063                         goto out;
5064                 }
5065                 rc = qdio_establish(&init_data);
5066                 if (rc) {
5067                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5068                         qdio_free(CARD_DDEV(card));
5069                 }
5070         }
5071
5072         switch (card->options.cq) {
5073         case QETH_CQ_ENABLED:
5074                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5075                 break;
5076         case QETH_CQ_DISABLED:
5077                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5078                 break;
5079         default:
5080                 break;
5081         }
5082 out:
5083         kfree(out_sbal_ptrs);
5084 out_free_queue_start_poll:
5085         kfree(queue_start_poll);
5086 out_free_in_sbals:
5087         kfree(in_sbal_ptrs);
5088 out_free_qib_param:
5089         kfree(qib_param_field);
5090 out_free_nothing:
5091         return rc;
5092 }
5093
5094 static void qeth_core_free_card(struct qeth_card *card)
5095 {
5096
5097         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5098         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5099         qeth_clean_channel(&card->read);
5100         qeth_clean_channel(&card->write);
5101         qeth_free_qdio_buffers(card);
5102         unregister_service_level(&card->qeth_service_level);
5103         kfree(card);
5104 }
5105
5106 void qeth_trace_features(struct qeth_card *card)
5107 {
5108         QETH_CARD_TEXT(card, 2, "features");
5109         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5110         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5111         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5112         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5113                       sizeof(card->info.diagass_support));
5114 }
5115 EXPORT_SYMBOL_GPL(qeth_trace_features);
5116
5117 static struct ccw_device_id qeth_ids[] = {
5118         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5119                                         .driver_info = QETH_CARD_TYPE_OSD},
5120         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5121                                         .driver_info = QETH_CARD_TYPE_IQD},
5122         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5123                                         .driver_info = QETH_CARD_TYPE_OSN},
5124         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5125                                         .driver_info = QETH_CARD_TYPE_OSM},
5126         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5127                                         .driver_info = QETH_CARD_TYPE_OSX},
5128         {},
5129 };
5130 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5131
5132 static struct ccw_driver qeth_ccw_driver = {
5133         .driver = {
5134                 .owner = THIS_MODULE,
5135                 .name = "qeth",
5136         },
5137         .ids = qeth_ids,
5138         .probe = ccwgroup_probe_ccwdev,
5139         .remove = ccwgroup_remove_ccwdev,
5140 };
5141
5142 int qeth_core_hardsetup_card(struct qeth_card *card)
5143 {
5144         int retries = 3;
5145         int rc;
5146
5147         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5148         atomic_set(&card->force_alloc_skb, 0);
5149         qeth_update_from_chp_desc(card);
5150 retry:
5151         if (retries < 3)
5152                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5153                         dev_name(&card->gdev->dev));
5154         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5155         ccw_device_set_offline(CARD_DDEV(card));
5156         ccw_device_set_offline(CARD_WDEV(card));
5157         ccw_device_set_offline(CARD_RDEV(card));
5158         qdio_free(CARD_DDEV(card));
5159         rc = ccw_device_set_online(CARD_RDEV(card));
5160         if (rc)
5161                 goto retriable;
5162         rc = ccw_device_set_online(CARD_WDEV(card));
5163         if (rc)
5164                 goto retriable;
5165         rc = ccw_device_set_online(CARD_DDEV(card));
5166         if (rc)
5167                 goto retriable;
5168 retriable:
5169         if (rc == -ERESTARTSYS) {
5170                 QETH_DBF_TEXT(SETUP, 2, "break1");
5171                 return rc;
5172         } else if (rc) {
5173                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5174                 if (--retries < 0)
5175                         goto out;
5176                 else
5177                         goto retry;
5178         }
5179         qeth_determine_capabilities(card);
5180         qeth_init_tokens(card);
5181         qeth_init_func_level(card);
5182         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5183         if (rc == -ERESTARTSYS) {
5184                 QETH_DBF_TEXT(SETUP, 2, "break2");
5185                 return rc;
5186         } else if (rc) {
5187                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5188                 if (--retries < 0)
5189                         goto out;
5190                 else
5191                         goto retry;
5192         }
5193         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5194         if (rc == -ERESTARTSYS) {
5195                 QETH_DBF_TEXT(SETUP, 2, "break3");
5196                 return rc;
5197         } else if (rc) {
5198                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5199                 if (--retries < 0)
5200                         goto out;
5201                 else
5202                         goto retry;
5203         }
5204         card->read_or_write_problem = 0;
5205         rc = qeth_mpc_initialize(card);
5206         if (rc) {
5207                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5208                 goto out;
5209         }
5210
5211         rc = qeth_send_startlan(card);
5212         if (rc) {
5213                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5214                 if (rc == IPA_RC_LAN_OFFLINE) {
5215                         dev_warn(&card->gdev->dev,
5216                                 "The LAN is offline\n");
5217                         card->lan_online = 0;
5218                 } else {
5219                         rc = -ENODEV;
5220                         goto out;
5221                 }
5222         } else
5223                 card->lan_online = 1;
5224
5225         card->options.ipa4.supported_funcs = 0;
5226         card->options.ipa6.supported_funcs = 0;
5227         card->options.adp.supported_funcs = 0;
5228         card->options.sbp.supported_funcs = 0;
5229         card->info.diagass_support = 0;
5230         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5231         if (rc == -ENOMEM)
5232                 goto out;
5233         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5234                 rc = qeth_query_setadapterparms(card);
5235                 if (rc < 0) {
5236                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5237                         goto out;
5238                 }
5239         }
5240         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5241                 rc = qeth_query_setdiagass(card);
5242                 if (rc < 0) {
5243                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5244                         goto out;
5245                 }
5246         }
5247         return 0;
5248 out:
5249         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5250                 "an error on the device\n");
5251         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5252                 dev_name(&card->gdev->dev), rc);
5253         return rc;
5254 }
5255 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5256
5257 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5258                                  struct sk_buff *skb, int offset, int data_len)
5259 {
5260         struct page *page = virt_to_page(element->addr);
5261         unsigned int next_frag;
5262
5263         /* first fill the linear space */
5264         if (!skb->len) {
5265                 unsigned int linear = min(data_len, skb_tailroom(skb));
5266
5267                 skb_put_data(skb, element->addr + offset, linear);
5268                 data_len -= linear;
5269                 if (!data_len)
5270                         return;
5271                 offset += linear;
5272                 /* fall through to add page frag for remaining data */
5273         }
5274
5275         next_frag = skb_shinfo(skb)->nr_frags;
5276         get_page(page);
5277         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5278 }
5279
5280 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5281 {
5282         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5283 }
5284
5285 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5286                 struct qeth_qdio_buffer *qethbuffer,
5287                 struct qdio_buffer_element **__element, int *__offset,
5288                 struct qeth_hdr **hdr)
5289 {
5290         struct qdio_buffer_element *element = *__element;
5291         struct qdio_buffer *buffer = qethbuffer->buffer;
5292         int offset = *__offset;
5293         struct sk_buff *skb;
5294         int skb_len = 0;
5295         void *data_ptr;
5296         int data_len;
5297         int headroom = 0;
5298         int use_rx_sg = 0;
5299
5300         /* qeth_hdr must not cross element boundaries */
5301         while (element->length < offset + sizeof(struct qeth_hdr)) {
5302                 if (qeth_is_last_sbale(element))
5303                         return NULL;
5304                 element++;
5305                 offset = 0;
5306         }
5307         *hdr = element->addr + offset;
5308
5309         offset += sizeof(struct qeth_hdr);
5310         switch ((*hdr)->hdr.l2.id) {
5311         case QETH_HEADER_TYPE_LAYER2:
5312                 skb_len = (*hdr)->hdr.l2.pkt_length;
5313                 break;
5314         case QETH_HEADER_TYPE_LAYER3:
5315                 skb_len = (*hdr)->hdr.l3.length;
5316                 headroom = ETH_HLEN;
5317                 break;
5318         case QETH_HEADER_TYPE_OSN:
5319                 skb_len = (*hdr)->hdr.osn.pdu_length;
5320                 headroom = sizeof(struct qeth_hdr);
5321                 break;
5322         default:
5323                 break;
5324         }
5325
5326         if (!skb_len)
5327                 return NULL;
5328
5329         if (((skb_len >= card->options.rx_sg_cb) &&
5330              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5331              (!atomic_read(&card->force_alloc_skb))) ||
5332             (card->options.cq == QETH_CQ_ENABLED))
5333                 use_rx_sg = 1;
5334
5335         if (use_rx_sg && qethbuffer->rx_skb) {
5336                 /* QETH_CQ_ENABLED only: */
5337                 skb = qethbuffer->rx_skb;
5338                 qethbuffer->rx_skb = NULL;
5339         } else {
5340                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5341
5342                 skb = dev_alloc_skb(linear + headroom);
5343         }
5344         if (!skb)
5345                 goto no_mem;
5346         if (headroom)
5347                 skb_reserve(skb, headroom);
5348
5349         data_ptr = element->addr + offset;
5350         while (skb_len) {
5351                 data_len = min(skb_len, (int)(element->length - offset));
5352                 if (data_len) {
5353                         if (use_rx_sg)
5354                                 qeth_create_skb_frag(element, skb, offset,
5355                                                      data_len);
5356                         else
5357                                 skb_put_data(skb, data_ptr, data_len);
5358                 }
5359                 skb_len -= data_len;
5360                 if (skb_len) {
5361                         if (qeth_is_last_sbale(element)) {
5362                                 QETH_CARD_TEXT(card, 4, "unexeob");
5363                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5364                                 dev_kfree_skb_any(skb);
5365                                 card->stats.rx_errors++;
5366                                 return NULL;
5367                         }
5368                         element++;
5369                         offset = 0;
5370                         data_ptr = element->addr;
5371                 } else {
5372                         offset += data_len;
5373                 }
5374         }
5375         *__element = element;
5376         *__offset = offset;
5377         if (use_rx_sg && card->options.performance_stats) {
5378                 card->perf_stats.sg_skbs_rx++;
5379                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5380         }
5381         return skb;
5382 no_mem:
5383         if (net_ratelimit()) {
5384                 QETH_CARD_TEXT(card, 2, "noskbmem");
5385         }
5386         card->stats.rx_dropped++;
5387         return NULL;
5388 }
5389 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5390
5391 int qeth_poll(struct napi_struct *napi, int budget)
5392 {
5393         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5394         int work_done = 0;
5395         struct qeth_qdio_buffer *buffer;
5396         int done;
5397         int new_budget = budget;
5398
5399         if (card->options.performance_stats) {
5400                 card->perf_stats.inbound_cnt++;
5401                 card->perf_stats.inbound_start_time = qeth_get_micros();
5402         }
5403
5404         while (1) {
5405                 if (!card->rx.b_count) {
5406                         card->rx.qdio_err = 0;
5407                         card->rx.b_count = qdio_get_next_buffers(
5408                                 card->data.ccwdev, 0, &card->rx.b_index,
5409                                 &card->rx.qdio_err);
5410                         if (card->rx.b_count <= 0) {
5411                                 card->rx.b_count = 0;
5412                                 break;
5413                         }
5414                         card->rx.b_element =
5415                                 &card->qdio.in_q->bufs[card->rx.b_index]
5416                                 .buffer->element[0];
5417                         card->rx.e_offset = 0;
5418                 }
5419
5420                 while (card->rx.b_count) {
5421                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5422                         if (!(card->rx.qdio_err &&
5423                             qeth_check_qdio_errors(card, buffer->buffer,
5424                             card->rx.qdio_err, "qinerr")))
5425                                 work_done +=
5426                                         card->discipline->process_rx_buffer(
5427                                                 card, new_budget, &done);
5428                         else
5429                                 done = 1;
5430
5431                         if (done) {
5432                                 if (card->options.performance_stats)
5433                                         card->perf_stats.bufs_rec++;
5434                                 qeth_put_buffer_pool_entry(card,
5435                                         buffer->pool_entry);
5436                                 qeth_queue_input_buffer(card, card->rx.b_index);
5437                                 card->rx.b_count--;
5438                                 if (card->rx.b_count) {
5439                                         card->rx.b_index =
5440                                                 (card->rx.b_index + 1) %
5441                                                 QDIO_MAX_BUFFERS_PER_Q;
5442                                         card->rx.b_element =
5443                                                 &card->qdio.in_q
5444                                                 ->bufs[card->rx.b_index]
5445                                                 .buffer->element[0];
5446                                         card->rx.e_offset = 0;
5447                                 }
5448                         }
5449
5450                         if (work_done >= budget)
5451                                 goto out;
5452                         else
5453                                 new_budget = budget - work_done;
5454                 }
5455         }
5456
5457         napi_complete_done(napi, work_done);
5458         if (qdio_start_irq(card->data.ccwdev, 0))
5459                 napi_schedule(&card->napi);
5460 out:
5461         if (card->options.performance_stats)
5462                 card->perf_stats.inbound_time += qeth_get_micros() -
5463                         card->perf_stats.inbound_start_time;
5464         return work_done;
5465 }
5466 EXPORT_SYMBOL_GPL(qeth_poll);
5467
5468 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5469 {
5470         if (!cmd->hdr.return_code)
5471                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5472         return cmd->hdr.return_code;
5473 }
5474
5475 int qeth_setassparms_cb(struct qeth_card *card,
5476                         struct qeth_reply *reply, unsigned long data)
5477 {
5478         struct qeth_ipa_cmd *cmd;
5479
5480         QETH_CARD_TEXT(card, 4, "defadpcb");
5481
5482         cmd = (struct qeth_ipa_cmd *) data;
5483         if (cmd->hdr.return_code == 0) {
5484                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5485                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5486                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5487                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5488                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5489         }
5490         return 0;
5491 }
5492 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5493
5494 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5495                                                  enum qeth_ipa_funcs ipa_func,
5496                                                  __u16 cmd_code, __u16 len,
5497                                                  enum qeth_prot_versions prot)
5498 {
5499         struct qeth_cmd_buffer *iob;
5500         struct qeth_ipa_cmd *cmd;
5501
5502         QETH_CARD_TEXT(card, 4, "getasscm");
5503         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5504
5505         if (iob) {
5506                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5507                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5508                 cmd->data.setassparms.hdr.length = 8 + len;
5509                 cmd->data.setassparms.hdr.command_code = cmd_code;
5510                 cmd->data.setassparms.hdr.return_code = 0;
5511                 cmd->data.setassparms.hdr.seq_no = 0;
5512         }
5513
5514         return iob;
5515 }
5516 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5517
5518 int qeth_send_setassparms(struct qeth_card *card,
5519                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5520                           int (*reply_cb)(struct qeth_card *,
5521                                           struct qeth_reply *, unsigned long),
5522                           void *reply_param)
5523 {
5524         int rc;
5525         struct qeth_ipa_cmd *cmd;
5526
5527         QETH_CARD_TEXT(card, 4, "sendassp");
5528
5529         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5530         if (len <= sizeof(__u32))
5531                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5532         else   /* (len > sizeof(__u32)) */
5533                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5534
5535         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5536         return rc;
5537 }
5538 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5539
5540 int qeth_send_simple_setassparms(struct qeth_card *card,
5541                                  enum qeth_ipa_funcs ipa_func,
5542                                  __u16 cmd_code, long data)
5543 {
5544         int rc;
5545         int length = 0;
5546         struct qeth_cmd_buffer *iob;
5547
5548         QETH_CARD_TEXT(card, 4, "simassp4");
5549         if (data)
5550                 length = sizeof(__u32);
5551         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
5552                                        length, QETH_PROT_IPV4);
5553         if (!iob)
5554                 return -ENOMEM;
5555         rc = qeth_send_setassparms(card, iob, length, data,
5556                                    qeth_setassparms_cb, NULL);
5557         return rc;
5558 }
5559 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms);
5560
5561 static void qeth_unregister_dbf_views(void)
5562 {
5563         int x;
5564         for (x = 0; x < QETH_DBF_INFOS; x++) {
5565                 debug_unregister(qeth_dbf[x].id);
5566                 qeth_dbf[x].id = NULL;
5567         }
5568 }
5569
5570 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5571 {
5572         char dbf_txt_buf[32];
5573         va_list args;
5574
5575         if (!debug_level_enabled(id, level))
5576                 return;
5577         va_start(args, fmt);
5578         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5579         va_end(args);
5580         debug_text_event(id, level, dbf_txt_buf);
5581 }
5582 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5583
5584 static int qeth_register_dbf_views(void)
5585 {
5586         int ret;
5587         int x;
5588
5589         for (x = 0; x < QETH_DBF_INFOS; x++) {
5590                 /* register the areas */
5591                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5592                                                 qeth_dbf[x].pages,
5593                                                 qeth_dbf[x].areas,
5594                                                 qeth_dbf[x].len);
5595                 if (qeth_dbf[x].id == NULL) {
5596                         qeth_unregister_dbf_views();
5597                         return -ENOMEM;
5598                 }
5599
5600                 /* register a view */
5601                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5602                 if (ret) {
5603                         qeth_unregister_dbf_views();
5604                         return ret;
5605                 }
5606
5607                 /* set a passing level */
5608                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5609         }
5610
5611         return 0;
5612 }
5613
5614 int qeth_core_load_discipline(struct qeth_card *card,
5615                 enum qeth_discipline_id discipline)
5616 {
5617         int rc = 0;
5618
5619         mutex_lock(&qeth_mod_mutex);
5620         switch (discipline) {
5621         case QETH_DISCIPLINE_LAYER3:
5622                 card->discipline = try_then_request_module(
5623                         symbol_get(qeth_l3_discipline), "qeth_l3");
5624                 break;
5625         case QETH_DISCIPLINE_LAYER2:
5626                 card->discipline = try_then_request_module(
5627                         symbol_get(qeth_l2_discipline), "qeth_l2");
5628                 break;
5629         default:
5630                 break;
5631         }
5632
5633         if (!card->discipline) {
5634                 dev_err(&card->gdev->dev, "There is no kernel module to "
5635                         "support discipline %d\n", discipline);
5636                 rc = -EINVAL;
5637         }
5638         mutex_unlock(&qeth_mod_mutex);
5639         return rc;
5640 }
5641
5642 void qeth_core_free_discipline(struct qeth_card *card)
5643 {
5644         if (card->options.layer2)
5645                 symbol_put(qeth_l2_discipline);
5646         else
5647                 symbol_put(qeth_l3_discipline);
5648         card->discipline = NULL;
5649 }
5650
5651 const struct device_type qeth_generic_devtype = {
5652         .name = "qeth_generic",
5653         .groups = qeth_generic_attr_groups,
5654 };
5655 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5656
5657 static const struct device_type qeth_osn_devtype = {
5658         .name = "qeth_osn",
5659         .groups = qeth_osn_attr_groups,
5660 };
5661
5662 #define DBF_NAME_LEN    20
5663
5664 struct qeth_dbf_entry {
5665         char dbf_name[DBF_NAME_LEN];
5666         debug_info_t *dbf_info;
5667         struct list_head dbf_list;
5668 };
5669
5670 static LIST_HEAD(qeth_dbf_list);
5671 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5672
5673 static debug_info_t *qeth_get_dbf_entry(char *name)
5674 {
5675         struct qeth_dbf_entry *entry;
5676         debug_info_t *rc = NULL;
5677
5678         mutex_lock(&qeth_dbf_list_mutex);
5679         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5680                 if (strcmp(entry->dbf_name, name) == 0) {
5681                         rc = entry->dbf_info;
5682                         break;
5683                 }
5684         }
5685         mutex_unlock(&qeth_dbf_list_mutex);
5686         return rc;
5687 }
5688
5689 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5690 {
5691         struct qeth_dbf_entry *new_entry;
5692
5693         card->debug = debug_register(name, 2, 1, 8);
5694         if (!card->debug) {
5695                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5696                 goto err;
5697         }
5698         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5699                 goto err_dbg;
5700         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5701         if (!new_entry)
5702                 goto err_dbg;
5703         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5704         new_entry->dbf_info = card->debug;
5705         mutex_lock(&qeth_dbf_list_mutex);
5706         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5707         mutex_unlock(&qeth_dbf_list_mutex);
5708
5709         return 0;
5710
5711 err_dbg:
5712         debug_unregister(card->debug);
5713 err:
5714         return -ENOMEM;
5715 }
5716
5717 static void qeth_clear_dbf_list(void)
5718 {
5719         struct qeth_dbf_entry *entry, *tmp;
5720
5721         mutex_lock(&qeth_dbf_list_mutex);
5722         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5723                 list_del(&entry->dbf_list);
5724                 debug_unregister(entry->dbf_info);
5725                 kfree(entry);
5726         }
5727         mutex_unlock(&qeth_dbf_list_mutex);
5728 }
5729
5730 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5731 {
5732         struct qeth_card *card;
5733         struct device *dev;
5734         int rc;
5735         enum qeth_discipline_id enforced_disc;
5736         unsigned long flags;
5737         char dbf_name[DBF_NAME_LEN];
5738
5739         QETH_DBF_TEXT(SETUP, 2, "probedev");
5740
5741         dev = &gdev->dev;
5742         if (!get_device(dev))
5743                 return -ENODEV;
5744
5745         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5746
5747         card = qeth_alloc_card();
5748         if (!card) {
5749                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5750                 rc = -ENOMEM;
5751                 goto err_dev;
5752         }
5753
5754         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5755                 dev_name(&gdev->dev));
5756         card->debug = qeth_get_dbf_entry(dbf_name);
5757         if (!card->debug) {
5758                 rc = qeth_add_dbf_entry(card, dbf_name);
5759                 if (rc)
5760                         goto err_card;
5761         }
5762
5763         card->read.ccwdev  = gdev->cdev[0];
5764         card->write.ccwdev = gdev->cdev[1];
5765         card->data.ccwdev  = gdev->cdev[2];
5766         dev_set_drvdata(&gdev->dev, card);
5767         card->gdev = gdev;
5768         gdev->cdev[0]->handler = qeth_irq;
5769         gdev->cdev[1]->handler = qeth_irq;
5770         gdev->cdev[2]->handler = qeth_irq;
5771
5772         qeth_determine_card_type(card);
5773         rc = qeth_setup_card(card);
5774         if (rc) {
5775                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5776                 goto err_card;
5777         }
5778
5779         qeth_determine_capabilities(card);
5780         enforced_disc = qeth_enforce_discipline(card);
5781         switch (enforced_disc) {
5782         case QETH_DISCIPLINE_UNDETERMINED:
5783                 gdev->dev.type = &qeth_generic_devtype;
5784                 break;
5785         default:
5786                 card->info.layer_enforced = true;
5787                 rc = qeth_core_load_discipline(card, enforced_disc);
5788                 if (rc)
5789                         goto err_card;
5790
5791                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5792                                         ? card->discipline->devtype
5793                                         : &qeth_osn_devtype;
5794                 rc = card->discipline->setup(card->gdev);
5795                 if (rc)
5796                         goto err_disc;
5797                 break;
5798         }
5799
5800         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5801         list_add_tail(&card->list, &qeth_core_card_list.list);
5802         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5803         return 0;
5804
5805 err_disc:
5806         qeth_core_free_discipline(card);
5807 err_card:
5808         qeth_core_free_card(card);
5809 err_dev:
5810         put_device(dev);
5811         return rc;
5812 }
5813
5814 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5815 {
5816         unsigned long flags;
5817         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5818
5819         QETH_DBF_TEXT(SETUP, 2, "removedv");
5820
5821         if (card->discipline) {
5822                 card->discipline->remove(gdev);
5823                 qeth_core_free_discipline(card);
5824         }
5825
5826         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5827         list_del(&card->list);
5828         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5829         qeth_core_free_card(card);
5830         dev_set_drvdata(&gdev->dev, NULL);
5831         put_device(&gdev->dev);
5832         return;
5833 }
5834
5835 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5836 {
5837         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5838         int rc = 0;
5839         enum qeth_discipline_id def_discipline;
5840
5841         if (!card->discipline) {
5842                 if (card->info.type == QETH_CARD_TYPE_IQD)
5843                         def_discipline = QETH_DISCIPLINE_LAYER3;
5844                 else
5845                         def_discipline = QETH_DISCIPLINE_LAYER2;
5846                 rc = qeth_core_load_discipline(card, def_discipline);
5847                 if (rc)
5848                         goto err;
5849                 rc = card->discipline->setup(card->gdev);
5850                 if (rc) {
5851                         qeth_core_free_discipline(card);
5852                         goto err;
5853                 }
5854         }
5855         rc = card->discipline->set_online(gdev);
5856 err:
5857         return rc;
5858 }
5859
5860 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5861 {
5862         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5863         return card->discipline->set_offline(gdev);
5864 }
5865
5866 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5867 {
5868         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5869         qeth_set_allowed_threads(card, 0, 1);
5870         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5871                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5872         qeth_qdio_clear_card(card, 0);
5873         qeth_clear_qdio_buffers(card);
5874         qdio_free(CARD_DDEV(card));
5875 }
5876
5877 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5878 {
5879         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5880         if (card->discipline && card->discipline->freeze)
5881                 return card->discipline->freeze(gdev);
5882         return 0;
5883 }
5884
5885 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5886 {
5887         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5888         if (card->discipline && card->discipline->thaw)
5889                 return card->discipline->thaw(gdev);
5890         return 0;
5891 }
5892
5893 static int qeth_core_restore(struct ccwgroup_device *gdev)
5894 {
5895         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5896         if (card->discipline && card->discipline->restore)
5897                 return card->discipline->restore(gdev);
5898         return 0;
5899 }
5900
5901 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5902         .driver = {
5903                 .owner = THIS_MODULE,
5904                 .name = "qeth",
5905         },
5906         .ccw_driver = &qeth_ccw_driver,
5907         .setup = qeth_core_probe_device,
5908         .remove = qeth_core_remove_device,
5909         .set_online = qeth_core_set_online,
5910         .set_offline = qeth_core_set_offline,
5911         .shutdown = qeth_core_shutdown,
5912         .prepare = NULL,
5913         .complete = NULL,
5914         .freeze = qeth_core_freeze,
5915         .thaw = qeth_core_thaw,
5916         .restore = qeth_core_restore,
5917 };
5918
5919 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5920                            size_t count)
5921 {
5922         int err;
5923
5924         err = ccwgroup_create_dev(qeth_core_root_dev,
5925                                   &qeth_core_ccwgroup_driver, 3, buf);
5926
5927         return err ? err : count;
5928 }
5929 static DRIVER_ATTR_WO(group);
5930
5931 static struct attribute *qeth_drv_attrs[] = {
5932         &driver_attr_group.attr,
5933         NULL,
5934 };
5935 static struct attribute_group qeth_drv_attr_group = {
5936         .attrs = qeth_drv_attrs,
5937 };
5938 static const struct attribute_group *qeth_drv_attr_groups[] = {
5939         &qeth_drv_attr_group,
5940         NULL,
5941 };
5942
5943 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5944 {
5945         struct qeth_card *card = dev->ml_priv;
5946         struct mii_ioctl_data *mii_data;
5947         int rc = 0;
5948
5949         if (!card)
5950                 return -ENODEV;
5951
5952         if (!qeth_card_hw_is_reachable(card))
5953                 return -ENODEV;
5954
5955         if (card->info.type == QETH_CARD_TYPE_OSN)
5956                 return -EPERM;
5957
5958         switch (cmd) {
5959         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5960                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5961                 break;
5962         case SIOC_QETH_GET_CARD_TYPE:
5963                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5964                      card->info.type == QETH_CARD_TYPE_OSM ||
5965                      card->info.type == QETH_CARD_TYPE_OSX) &&
5966                     !card->info.guestlan)
5967                         return 1;
5968                 else
5969                         return 0;
5970         case SIOCGMIIPHY:
5971                 mii_data = if_mii(rq);
5972                 mii_data->phy_id = 0;
5973                 break;
5974         case SIOCGMIIREG:
5975                 mii_data = if_mii(rq);
5976                 if (mii_data->phy_id != 0)
5977                         rc = -EINVAL;
5978                 else
5979                         mii_data->val_out = qeth_mdio_read(dev,
5980                                 mii_data->phy_id, mii_data->reg_num);
5981                 break;
5982         case SIOC_QETH_QUERY_OAT:
5983                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5984                 break;
5985         default:
5986                 if (card->discipline->do_ioctl)
5987                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5988                 else
5989                         rc = -EOPNOTSUPP;
5990         }
5991         if (rc)
5992                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5993         return rc;
5994 }
5995 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5996
5997 static struct {
5998         const char str[ETH_GSTRING_LEN];
5999 } qeth_ethtool_stats_keys[] = {
6000 /*  0 */{"rx skbs"},
6001         {"rx buffers"},
6002         {"tx skbs"},
6003         {"tx buffers"},
6004         {"tx skbs no packing"},
6005         {"tx buffers no packing"},
6006         {"tx skbs packing"},
6007         {"tx buffers packing"},
6008         {"tx sg skbs"},
6009         {"tx sg frags"},
6010 /* 10 */{"rx sg skbs"},
6011         {"rx sg frags"},
6012         {"rx sg page allocs"},
6013         {"tx large kbytes"},
6014         {"tx large count"},
6015         {"tx pk state ch n->p"},
6016         {"tx pk state ch p->n"},
6017         {"tx pk watermark low"},
6018         {"tx pk watermark high"},
6019         {"queue 0 buffer usage"},
6020 /* 20 */{"queue 1 buffer usage"},
6021         {"queue 2 buffer usage"},
6022         {"queue 3 buffer usage"},
6023         {"rx poll time"},
6024         {"rx poll count"},
6025         {"rx do_QDIO time"},
6026         {"rx do_QDIO count"},
6027         {"tx handler time"},
6028         {"tx handler count"},
6029         {"tx time"},
6030 /* 30 */{"tx count"},
6031         {"tx do_QDIO time"},
6032         {"tx do_QDIO count"},
6033         {"tx csum"},
6034         {"tx lin"},
6035         {"tx linfail"},
6036         {"cq handler count"},
6037         {"cq handler time"}
6038 };
6039
6040 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6041 {
6042         switch (stringset) {
6043         case ETH_SS_STATS:
6044                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6045         default:
6046                 return -EINVAL;
6047         }
6048 }
6049 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6050
6051 void qeth_core_get_ethtool_stats(struct net_device *dev,
6052                 struct ethtool_stats *stats, u64 *data)
6053 {
6054         struct qeth_card *card = dev->ml_priv;
6055         data[0] = card->stats.rx_packets -
6056                                 card->perf_stats.initial_rx_packets;
6057         data[1] = card->perf_stats.bufs_rec;
6058         data[2] = card->stats.tx_packets -
6059                                 card->perf_stats.initial_tx_packets;
6060         data[3] = card->perf_stats.bufs_sent;
6061         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6062                         - card->perf_stats.skbs_sent_pack;
6063         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6064         data[6] = card->perf_stats.skbs_sent_pack;
6065         data[7] = card->perf_stats.bufs_sent_pack;
6066         data[8] = card->perf_stats.sg_skbs_sent;
6067         data[9] = card->perf_stats.sg_frags_sent;
6068         data[10] = card->perf_stats.sg_skbs_rx;
6069         data[11] = card->perf_stats.sg_frags_rx;
6070         data[12] = card->perf_stats.sg_alloc_page_rx;
6071         data[13] = (card->perf_stats.large_send_bytes >> 10);
6072         data[14] = card->perf_stats.large_send_cnt;
6073         data[15] = card->perf_stats.sc_dp_p;
6074         data[16] = card->perf_stats.sc_p_dp;
6075         data[17] = QETH_LOW_WATERMARK_PACK;
6076         data[18] = QETH_HIGH_WATERMARK_PACK;
6077         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6078         data[20] = (card->qdio.no_out_queues > 1) ?
6079                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6080         data[21] = (card->qdio.no_out_queues > 2) ?
6081                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6082         data[22] = (card->qdio.no_out_queues > 3) ?
6083                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6084         data[23] = card->perf_stats.inbound_time;
6085         data[24] = card->perf_stats.inbound_cnt;
6086         data[25] = card->perf_stats.inbound_do_qdio_time;
6087         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6088         data[27] = card->perf_stats.outbound_handler_time;
6089         data[28] = card->perf_stats.outbound_handler_cnt;
6090         data[29] = card->perf_stats.outbound_time;
6091         data[30] = card->perf_stats.outbound_cnt;
6092         data[31] = card->perf_stats.outbound_do_qdio_time;
6093         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6094         data[33] = card->perf_stats.tx_csum;
6095         data[34] = card->perf_stats.tx_lin;
6096         data[35] = card->perf_stats.tx_linfail;
6097         data[36] = card->perf_stats.cq_cnt;
6098         data[37] = card->perf_stats.cq_time;
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 {
6357         struct qeth_cmd_buffer *iob;
6358         int rc = -ENOMEM;
6359
6360         QETH_CARD_TEXT(card, 4, "chkdocmd");
6361         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6362                                        sizeof(__u32), QETH_PROT_IPV4);
6363         if (iob)
6364                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6365                                            qeth_ipa_checksum_run_cmd_cb,
6366                                            chksum_cb);
6367         return rc;
6368 }
6369
6370 static int qeth_send_checksum_on(struct qeth_card *card, int cstype)
6371 {
6372         const __u32 required_features = QETH_IPA_CHECKSUM_IP_HDR |
6373                                         QETH_IPA_CHECKSUM_UDP |
6374                                         QETH_IPA_CHECKSUM_TCP;
6375         struct qeth_checksum_cmd chksum_cb;
6376         int rc;
6377
6378         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6379                                        &chksum_cb);
6380         if (!rc) {
6381                 if ((required_features & chksum_cb.supported) !=
6382                     required_features)
6383                         rc = -EIO;
6384                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6385                          cstype == IPA_INBOUND_CHECKSUM)
6386                         dev_warn(&card->gdev->dev,
6387                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6388                                  QETH_CARD_IFNAME(card));
6389         }
6390         if (rc) {
6391                 qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
6392                 dev_warn(&card->gdev->dev,
6393                          "Starting HW checksumming for %s failed, using SW checksumming\n",
6394                          QETH_CARD_IFNAME(card));
6395                 return rc;
6396         }
6397         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6398                                        chksum_cb.supported, &chksum_cb);
6399         if (!rc) {
6400                 if ((required_features & chksum_cb.enabled) !=
6401                     required_features)
6402                         rc = -EIO;
6403         }
6404         if (rc) {
6405                 qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
6406                 dev_warn(&card->gdev->dev,
6407                          "Enabling HW checksumming for %s failed, using SW checksumming\n",
6408                          QETH_CARD_IFNAME(card));
6409                 return rc;
6410         }
6411
6412         dev_info(&card->gdev->dev, "HW Checksumming (%sbound) enabled\n",
6413                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out");
6414         return 0;
6415 }
6416
6417 static int qeth_set_ipa_csum(struct qeth_card *card, int on, int cstype)
6418 {
6419         int rc = (on) ? qeth_send_checksum_on(card, cstype)
6420                       : qeth_send_simple_setassparms(card, cstype,
6421                                                      IPA_CMD_ASS_STOP, 0);
6422         return rc ? -EIO : 0;
6423 }
6424
6425 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6426 {
6427         int rc;
6428
6429         QETH_CARD_TEXT(card, 3, "sttso");
6430
6431         if (on) {
6432                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6433                                                   IPA_CMD_ASS_START, 0);
6434                 if (rc) {
6435                         dev_warn(&card->gdev->dev,
6436                                  "Starting outbound TCP segmentation offload for %s failed\n",
6437                                  QETH_CARD_IFNAME(card));
6438                         return -EIO;
6439                 }
6440                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6441         } else {
6442                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6443                                                   IPA_CMD_ASS_STOP, 0);
6444         }
6445         return rc;
6446 }
6447
6448 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO)
6449
6450 /**
6451  * qeth_recover_features() - Restore device features after recovery
6452  * @dev:        the recovering net_device
6453  *
6454  * Caller must hold rtnl lock.
6455  */
6456 void qeth_recover_features(struct net_device *dev)
6457 {
6458         netdev_features_t features = dev->features;
6459         struct qeth_card *card = dev->ml_priv;
6460
6461         /* force-off any feature that needs an IPA sequence.
6462          * netdev_update_features() will restart them.
6463          */
6464         dev->features &= ~QETH_HW_FEATURES;
6465         netdev_update_features(dev);
6466
6467         if (features == dev->features)
6468                 return;
6469         dev_warn(&card->gdev->dev,
6470                  "Device recovery failed to restore all offload features\n");
6471 }
6472 EXPORT_SYMBOL_GPL(qeth_recover_features);
6473
6474 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6475 {
6476         struct qeth_card *card = dev->ml_priv;
6477         netdev_features_t changed = dev->features ^ features;
6478         int rc = 0;
6479
6480         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6481         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6482
6483         if ((changed & NETIF_F_IP_CSUM)) {
6484                 rc = qeth_set_ipa_csum(card,
6485                                        features & NETIF_F_IP_CSUM ? 1 : 0,
6486                                        IPA_OUTBOUND_CHECKSUM);
6487                 if (rc)
6488                         changed ^= NETIF_F_IP_CSUM;
6489         }
6490         if ((changed & NETIF_F_RXCSUM)) {
6491                 rc = qeth_set_ipa_csum(card,
6492                                         features & NETIF_F_RXCSUM ? 1 : 0,
6493                                         IPA_INBOUND_CHECKSUM);
6494                 if (rc)
6495                         changed ^= NETIF_F_RXCSUM;
6496         }
6497         if ((changed & NETIF_F_TSO)) {
6498                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6499                 if (rc)
6500                         changed ^= NETIF_F_TSO;
6501         }
6502
6503         /* everything changed successfully? */
6504         if ((dev->features ^ features) == changed)
6505                 return 0;
6506         /* something went wrong. save changed features and return error */
6507         dev->features ^= changed;
6508         return -EIO;
6509 }
6510 EXPORT_SYMBOL_GPL(qeth_set_features);
6511
6512 netdev_features_t qeth_fix_features(struct net_device *dev,
6513                                     netdev_features_t features)
6514 {
6515         struct qeth_card *card = dev->ml_priv;
6516
6517         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6518         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6519                 features &= ~NETIF_F_IP_CSUM;
6520         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6521                 features &= ~NETIF_F_RXCSUM;
6522         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6523                 features &= ~NETIF_F_TSO;
6524         /* if the card isn't up, remove features that require hw changes */
6525         if (card->state == CARD_STATE_DOWN ||
6526             card->state == CARD_STATE_RECOVER)
6527                 features &= ~QETH_HW_FEATURES;
6528         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6529         return features;
6530 }
6531 EXPORT_SYMBOL_GPL(qeth_fix_features);
6532
6533 netdev_features_t qeth_features_check(struct sk_buff *skb,
6534                                       struct net_device *dev,
6535                                       netdev_features_t features)
6536 {
6537         /* GSO segmentation builds skbs with
6538          *      a (small) linear part for the headers, and
6539          *      page frags for the data.
6540          * Compared to a linear skb, the header-only part consumes an
6541          * additional buffer element. This reduces buffer utilization, and
6542          * hurts throughput. So compress small segments into one element.
6543          */
6544         if (netif_needs_gso(skb, features)) {
6545                 /* match skb_segment(): */
6546                 unsigned int doffset = skb->data - skb_mac_header(skb);
6547                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6548                 unsigned int hroom = skb_headroom(skb);
6549
6550                 /* linearize only if resulting skb allocations are order-0: */
6551                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6552                         features &= ~NETIF_F_SG;
6553         }
6554
6555         return vlan_features_check(skb, features);
6556 }
6557 EXPORT_SYMBOL_GPL(qeth_features_check);
6558
6559 static int __init qeth_core_init(void)
6560 {
6561         int rc;
6562
6563         pr_info("loading core functions\n");
6564         INIT_LIST_HEAD(&qeth_core_card_list.list);
6565         INIT_LIST_HEAD(&qeth_dbf_list);
6566         rwlock_init(&qeth_core_card_list.rwlock);
6567         mutex_init(&qeth_mod_mutex);
6568
6569         qeth_wq = create_singlethread_workqueue("qeth_wq");
6570
6571         rc = qeth_register_dbf_views();
6572         if (rc)
6573                 goto out_err;
6574         qeth_core_root_dev = root_device_register("qeth");
6575         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6576         if (rc)
6577                 goto register_err;
6578         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6579                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6580         if (!qeth_core_header_cache) {
6581                 rc = -ENOMEM;
6582                 goto slab_err;
6583         }
6584         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6585                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6586         if (!qeth_qdio_outbuf_cache) {
6587                 rc = -ENOMEM;
6588                 goto cqslab_err;
6589         }
6590         rc = ccw_driver_register(&qeth_ccw_driver);
6591         if (rc)
6592                 goto ccw_err;
6593         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6594         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6595         if (rc)
6596                 goto ccwgroup_err;
6597
6598         return 0;
6599
6600 ccwgroup_err:
6601         ccw_driver_unregister(&qeth_ccw_driver);
6602 ccw_err:
6603         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6604 cqslab_err:
6605         kmem_cache_destroy(qeth_core_header_cache);
6606 slab_err:
6607         root_device_unregister(qeth_core_root_dev);
6608 register_err:
6609         qeth_unregister_dbf_views();
6610 out_err:
6611         pr_err("Initializing the qeth device driver failed\n");
6612         return rc;
6613 }
6614
6615 static void __exit qeth_core_exit(void)
6616 {
6617         qeth_clear_dbf_list();
6618         destroy_workqueue(qeth_wq);
6619         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6620         ccw_driver_unregister(&qeth_ccw_driver);
6621         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6622         kmem_cache_destroy(qeth_core_header_cache);
6623         root_device_unregister(qeth_core_root_dev);
6624         qeth_unregister_dbf_views();
6625         pr_info("core functions removed\n");
6626 }
6627
6628 module_init(qeth_core_init);
6629 module_exit(qeth_core_exit);
6630 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
6631 MODULE_DESCRIPTION("qeth core functions");
6632 MODULE_LICENSE("GPL");