drivers/s390/net/qeth_core_main.c

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   4  *               Frank Pavlic <fpavlic@de.ibm.com>,
   5  *               Thomas Spatzier <tspat@de.ibm.com>,
   6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   7  */
   8
   9 #define KMSG_COMPONENT "qeth"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/string.h>
  15 #include <linux/errno.h>
  16 #include <linux/kernel.h>
  17 #include <linux/ip.h>
  18 #include <linux/tcp.h>
  19 #include <linux/mii.h>
  20 #include <linux/kthread.h>
  21 #include <linux/slab.h>
  22 #include <linux/if_vlan.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/netdev_features.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/vmalloc.h>
  27
  28 #include <net/iucv/af_iucv.h>
  29 #include <net/dsfield.h>
  30
  31 #include <asm/ebcdic.h>
  32 #include <asm/chpid.h>
  33 #include <asm/io.h>
  34 #include <asm/sysinfo.h>
  35 #include <asm/compat.h>
  36 #include <asm/diag.h>
  37 #include <asm/cio.h>
  38 #include <asm/ccwdev.h>
  39
  40 #include "qeth_core.h"
  41
  42 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  43         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  44         /*                   N  P  A    M  L  V                      H  */
  45         [QETH_DBF_SETUP] = {"qeth_setup",
  46                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  47         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  48                             &debug_sprintf_view, NULL},
  49         [QETH_DBF_CTRL]  = {"qeth_control",
  50                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  51 };
  52 EXPORT_SYMBOL_GPL(qeth_dbf);
  53
  54 struct qeth_card_list_struct qeth_core_card_list;
  55 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  56 struct kmem_cache *qeth_core_header_cache;
  57 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  58 static struct kmem_cache *qeth_qdio_outbuf_cache;
  59
  60 static struct device *qeth_core_root_dev;
  61 static unsigned int known_devices[][6] = QETH_MODELLIST_ARRAY;
  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                 atomic_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         WARN_ON(atomic_read(&reply->refcnt) <= 0);
 588         atomic_inc(&reply->refcnt);
 589 }
 590
 591 static void qeth_put_reply(struct qeth_reply *reply)
 592 {
 593         WARN_ON(atomic_read(&reply->refcnt) <= 0);
 594         if (atomic_dec_and_test(&reply->refcnt))
 595                 kfree(reply);
 596 }
 597
 598 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 599                 struct qeth_card *card)
 600 {
 601         char *ipa_name;
 602         int com = cmd->hdr.command;
 603         ipa_name = qeth_get_ipa_cmd_name(com);
 604         if (rc)
 605                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 606                                 "x%X \"%s\"\n",
 607                                 ipa_name, com, dev_name(&card->gdev->dev),
 608                                 QETH_CARD_IFNAME(card), rc,
 609                                 qeth_get_ipa_msg(rc));
 610         else
 611                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 612                                 ipa_name, com, dev_name(&card->gdev->dev),
 613                                 QETH_CARD_IFNAME(card));
 614 }
 615
 616 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 617                 struct qeth_cmd_buffer *iob)
 618 {
 619         struct qeth_ipa_cmd *cmd = NULL;
 620
 621         QETH_CARD_TEXT(card, 5, "chkipad");
 622         if (IS_IPA(iob->data)) {
 623                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 624                 if (IS_IPA_REPLY(cmd)) {
 625                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 626                             cmd->hdr.command != IPA_CMD_DELCCID &&
 627                             cmd->hdr.command != IPA_CMD_MODCCID &&
 628                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 629                                 qeth_issue_ipa_msg(cmd,
 630                                                 cmd->hdr.return_code, card);
 631                         return cmd;
 632                 } else {
 633                         switch (cmd->hdr.command) {
 634                         case IPA_CMD_STOPLAN:
 635                                 if (cmd->hdr.return_code ==
 636                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 637                                         dev_err(&card->gdev->dev,
 638                                            "Interface %s is down because the "
 639                                            "adjacent port is no longer in "
 640                                            "reflective relay mode\n",
 641                                            QETH_CARD_IFNAME(card));
 642                                         qeth_close_dev(card);
 643                                 } else {
 644                                         dev_warn(&card->gdev->dev,
 645                                            "The link for interface %s on CHPID"
 646                                            " 0x%X failed\n",
 647                                            QETH_CARD_IFNAME(card),
 648                                            card->info.chpid);
 649                                         qeth_issue_ipa_msg(cmd,
 650                                                 cmd->hdr.return_code, card);
 651                                 }
 652                                 card->lan_online = 0;
 653                                 if (card->dev && netif_carrier_ok(card->dev))
 654                                         netif_carrier_off(card->dev);
 655                                 return NULL;
 656                         case IPA_CMD_STARTLAN:
 657                                 dev_info(&card->gdev->dev,
 658                                            "The link for %s on CHPID 0x%X has"
 659                                            " been restored\n",
 660                                            QETH_CARD_IFNAME(card),
 661                                            card->info.chpid);
 662                                 netif_carrier_on(card->dev);
 663                                 card->lan_online = 1;
 664                                 if (card->info.hwtrap)
 665                                         card->info.hwtrap = 2;
 666                                 qeth_schedule_recovery(card);
 667                                 return NULL;
 668                         case IPA_CMD_SETBRIDGEPORT_IQD:
 669                         case IPA_CMD_SETBRIDGEPORT_OSA:
 670                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 671                                 if (card->discipline->control_event_handler
 672                                                                 (card, cmd))
 673                                         return cmd;
 674                                 else
 675                                         return NULL;
 676                         case IPA_CMD_MODCCID:
 677                                 return cmd;
 678                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 679                                 QETH_CARD_TEXT(card, 3, "irla");
 680                                 break;
 681                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 682                                 QETH_CARD_TEXT(card, 3, "urla");
 683                                 break;
 684                         default:
 685                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 686                                            "but not a reply!\n");
 687                                 break;
 688                         }
 689                 }
 690         }
 691         return cmd;
 692 }
 693
 694 void qeth_clear_ipacmd_list(struct qeth_card *card)
 695 {
 696         struct qeth_reply *reply, *r;
 697         unsigned long flags;
 698
 699         QETH_CARD_TEXT(card, 4, "clipalst");
 700
 701         spin_lock_irqsave(&card->lock, flags);
 702         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 703                 qeth_get_reply(reply);
 704                 reply->rc = -EIO;
 705                 atomic_inc(&reply->received);
 706                 list_del_init(&reply->list);
 707                 wake_up(&reply->wait_q);
 708                 qeth_put_reply(reply);
 709         }
 710         spin_unlock_irqrestore(&card->lock, flags);
 711         atomic_set(&card->write.irq_pending, 0);
 712 }
 713 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 714
 715 static int qeth_check_idx_response(struct qeth_card *card,
 716         unsigned char *buffer)
 717 {
 718         if (!buffer)
 719                 return 0;
 720
 721         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 722         if ((buffer[2] & 0xc0) == 0xc0) {
 723                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE "
 724                            "with cause code 0x%02x%s\n",
 725                            buffer[4],
 726                            ((buffer[4] == 0x22) ?
 727                             " -- try another portname" : ""));
 728                 QETH_CARD_TEXT(card, 2, "ckidxres");
 729                 QETH_CARD_TEXT(card, 2, " idxterm");
 730                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 731                 if (buffer[4] == 0xf6) {
 732                         dev_err(&card->gdev->dev,
 733                         "The qeth device is not configured "
 734                         "for the OSI layer required by z/VM\n");
 735                         return -EPERM;
 736                 }
 737                 return -EIO;
 738         }
 739         return 0;
 740 }
 741
 742 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 743 {
 744         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 745                 dev_get_drvdata(&cdev->dev))->dev);
 746         return card;
 747 }
 748
 749 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
 750                 __u32 len)
 751 {
 752         struct qeth_card *card;
 753
 754         card = CARD_FROM_CDEV(channel->ccwdev);
 755         QETH_CARD_TEXT(card, 4, "setupccw");
 756         if (channel == &card->read)
 757                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
 758         else
 759                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
 760         channel->ccw.count = len;
 761         channel->ccw.cda = (__u32) __pa(iob);
 762 }
 763
 764 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 765 {
 766         __u8 index;
 767
 768         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 769         index = channel->io_buf_no;
 770         do {
 771                 if (channel->iob[index].state == BUF_STATE_FREE) {
 772                         channel->iob[index].state = BUF_STATE_LOCKED;
 773                         channel->io_buf_no = (channel->io_buf_no + 1) %
 774                                 QETH_CMD_BUFFER_NO;
 775                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 776                         return channel->iob + index;
 777                 }
 778                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 779         } while (index != channel->io_buf_no);
 780
 781         return NULL;
 782 }
 783
 784 void qeth_release_buffer(struct qeth_channel *channel,
 785                 struct qeth_cmd_buffer *iob)
 786 {
 787         unsigned long flags;
 788
 789         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 790         spin_lock_irqsave(&channel->iob_lock, flags);
 791         memset(iob->data, 0, QETH_BUFSIZE);
 792         iob->state = BUF_STATE_FREE;
 793         iob->callback = qeth_send_control_data_cb;
 794         iob->rc = 0;
 795         spin_unlock_irqrestore(&channel->iob_lock, flags);
 796         wake_up(&channel->wait_q);
 797 }
 798 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 799
 800 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 801 {
 802         struct qeth_cmd_buffer *buffer = NULL;
 803         unsigned long flags;
 804
 805         spin_lock_irqsave(&channel->iob_lock, flags);
 806         buffer = __qeth_get_buffer(channel);
 807         spin_unlock_irqrestore(&channel->iob_lock, flags);
 808         return buffer;
 809 }
 810
 811 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 812 {
 813         struct qeth_cmd_buffer *buffer;
 814         wait_event(channel->wait_q,
 815                    ((buffer = qeth_get_buffer(channel)) != NULL));
 816         return buffer;
 817 }
 818 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 819
 820 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 821 {
 822         int cnt;
 823
 824         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 825                 qeth_release_buffer(channel, &channel->iob[cnt]);
 826         channel->buf_no = 0;
 827         channel->io_buf_no = 0;
 828 }
 829 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 830
 831 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 832                   struct qeth_cmd_buffer *iob)
 833 {
 834         struct qeth_card *card;
 835         struct qeth_reply *reply, *r;
 836         struct qeth_ipa_cmd *cmd;
 837         unsigned long flags;
 838         int keep_reply;
 839         int rc = 0;
 840
 841         card = CARD_FROM_CDEV(channel->ccwdev);
 842         QETH_CARD_TEXT(card, 4, "sndctlcb");
 843         rc = qeth_check_idx_response(card, iob->data);
 844         switch (rc) {
 845         case 0:
 846                 break;
 847         case -EIO:
 848                 qeth_clear_ipacmd_list(card);
 849                 qeth_schedule_recovery(card);
 850                 /* fall through */
 851         default:
 852                 goto out;
 853         }
 854
 855         cmd = qeth_check_ipa_data(card, iob);
 856         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 857                 goto out;
 858         /*in case of OSN : check if cmd is set */
 859         if (card->info.type == QETH_CARD_TYPE_OSN &&
 860             cmd &&
 861             cmd->hdr.command != IPA_CMD_STARTLAN &&
 862             card->osn_info.assist_cb != NULL) {
 863                 card->osn_info.assist_cb(card->dev, cmd);
 864                 goto out;
 865         }
 866
 867         spin_lock_irqsave(&card->lock, flags);
 868         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 869                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 870                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 871                         qeth_get_reply(reply);
 872                         list_del_init(&reply->list);
 873                         spin_unlock_irqrestore(&card->lock, flags);
 874                         keep_reply = 0;
 875                         if (reply->callback != NULL) {
 876                                 if (cmd) {
 877                                         reply->offset = (__u16)((char *)cmd -
 878                                                         (char *)iob->data);
 879                                         keep_reply = reply->callback(card,
 880                                                         reply,
 881                                                         (unsigned long)cmd);
 882                                 } else
 883                                         keep_reply = reply->callback(card,
 884                                                         reply,
 885                                                         (unsigned long)iob);
 886                         }
 887                         if (cmd)
 888                                 reply->rc = (u16) cmd->hdr.return_code;
 889                         else if (iob->rc)
 890                                 reply->rc = iob->rc;
 891                         if (keep_reply) {
 892                                 spin_lock_irqsave(&card->lock, flags);
 893                                 list_add_tail(&reply->list,
 894                                               &card->cmd_waiter_list);
 895                                 spin_unlock_irqrestore(&card->lock, flags);
 896                         } else {
 897                                 atomic_inc(&reply->received);
 898                                 wake_up(&reply->wait_q);
 899                         }
 900                         qeth_put_reply(reply);
 901                         goto out;
 902                 }
 903         }
 904         spin_unlock_irqrestore(&card->lock, flags);
 905 out:
 906         memcpy(&card->seqno.pdu_hdr_ack,
 907                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 908                 QETH_SEQ_NO_LENGTH);
 909         qeth_release_buffer(channel, iob);
 910 }
 911
 912 static int qeth_setup_channel(struct qeth_channel *channel)
 913 {
 914         int cnt;
 915
 916         QETH_DBF_TEXT(SETUP, 2, "setupch");
 917         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 918                 channel->iob[cnt].data =
 919                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 920                 if (channel->iob[cnt].data == NULL)
 921                         break;
 922                 channel->iob[cnt].state = BUF_STATE_FREE;
 923                 channel->iob[cnt].channel = channel;
 924                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 925                 channel->iob[cnt].rc = 0;
 926         }
 927         if (cnt < QETH_CMD_BUFFER_NO) {
 928                 while (cnt-- > 0)
 929                         kfree(channel->iob[cnt].data);
 930                 return -ENOMEM;
 931         }
 932         channel->buf_no = 0;
 933         channel->io_buf_no = 0;
 934         atomic_set(&channel->irq_pending, 0);
 935         spin_lock_init(&channel->iob_lock);
 936
 937         init_waitqueue_head(&channel->wait_q);
 938         return 0;
 939 }
 940
 941 static int qeth_set_thread_start_bit(struct qeth_card *card,
 942                 unsigned long thread)
 943 {
 944         unsigned long flags;
 945
 946         spin_lock_irqsave(&card->thread_mask_lock, flags);
 947         if (!(card->thread_allowed_mask & thread) ||
 948               (card->thread_start_mask & thread)) {
 949                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 950                 return -EPERM;
 951         }
 952         card->thread_start_mask |= thread;
 953         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 954         return 0;
 955 }
 956
 957 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 958 {
 959         unsigned long flags;
 960
 961         spin_lock_irqsave(&card->thread_mask_lock, flags);
 962         card->thread_start_mask &= ~thread;
 963         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 964         wake_up(&card->wait_q);
 965 }
 966 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 967
 968 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 969 {
 970         unsigned long flags;
 971
 972         spin_lock_irqsave(&card->thread_mask_lock, flags);
 973         card->thread_running_mask &= ~thread;
 974         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 975         wake_up_all(&card->wait_q);
 976 }
 977 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 978
 979 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 980 {
 981         unsigned long flags;
 982         int rc = 0;
 983
 984         spin_lock_irqsave(&card->thread_mask_lock, flags);
 985         if (card->thread_start_mask & thread) {
 986                 if ((card->thread_allowed_mask & thread) &&
 987                     !(card->thread_running_mask & thread)) {
 988                         rc = 1;
 989                         card->thread_start_mask &= ~thread;
 990                         card->thread_running_mask |= thread;
 991                 } else
 992                         rc = -EPERM;
 993         }
 994         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 995         return rc;
 996 }
 997
 998 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 999 {
1000         int rc = 0;
1001
1002         wait_event(card->wait_q,
1003                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1004         return rc;
1005 }
1006 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
1007
1008 void qeth_schedule_recovery(struct qeth_card *card)
1009 {
1010         QETH_CARD_TEXT(card, 2, "startrec");
1011         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
1012                 schedule_work(&card->kernel_thread_starter);
1013 }
1014 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
1015
1016 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
1017 {
1018         int dstat, cstat;
1019         char *sense;
1020         struct qeth_card *card;
1021
1022         sense = (char *) irb->ecw;
1023         cstat = irb->scsw.cmd.cstat;
1024         dstat = irb->scsw.cmd.dstat;
1025         card = CARD_FROM_CDEV(cdev);
1026
1027         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1028                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1029                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1030                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1031                 dev_warn(&cdev->dev, "The qeth device driver "
1032                         "failed to recover an error on the device\n");
1033                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1034                         dev_name(&cdev->dev), dstat, cstat);
1035                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1036                                 16, 1, irb, 64, 1);
1037                 return 1;
1038         }
1039
1040         if (dstat & DEV_STAT_UNIT_CHECK) {
1041                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1042                     SENSE_RESETTING_EVENT_FLAG) {
1043                         QETH_CARD_TEXT(card, 2, "REVIND");
1044                         return 1;
1045                 }
1046                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1047                     SENSE_COMMAND_REJECT_FLAG) {
1048                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1049                         return 1;
1050                 }
1051                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1052                         QETH_CARD_TEXT(card, 2, "AFFE");
1053                         return 1;
1054                 }
1055                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1056                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1057                         return 0;
1058                 }
1059                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1060                         return 1;
1061         }
1062         return 0;
1063 }
1064
1065 static long __qeth_check_irb_error(struct ccw_device *cdev,
1066                 unsigned long intparm, struct irb *irb)
1067 {
1068         struct qeth_card *card;
1069
1070         card = CARD_FROM_CDEV(cdev);
1071
1072         if (!card || !IS_ERR(irb))
1073                 return 0;
1074
1075         switch (PTR_ERR(irb)) {
1076         case -EIO:
1077                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1078                         dev_name(&cdev->dev));
1079                 QETH_CARD_TEXT(card, 2, "ckirberr");
1080                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1081                 break;
1082         case -ETIMEDOUT:
1083                 dev_warn(&cdev->dev, "A hardware operation timed out"
1084                         " on the device\n");
1085                 QETH_CARD_TEXT(card, 2, "ckirberr");
1086                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1087                 if (intparm == QETH_RCD_PARM) {
1088                         if (card->data.ccwdev == cdev) {
1089                                 card->data.state = CH_STATE_DOWN;
1090                                 wake_up(&card->wait_q);
1091                         }
1092                 }
1093                 break;
1094         default:
1095                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1096                         dev_name(&cdev->dev), PTR_ERR(irb));
1097                 QETH_CARD_TEXT(card, 2, "ckirberr");
1098                 QETH_CARD_TEXT(card, 2, "  rc???");
1099         }
1100         return PTR_ERR(irb);
1101 }
1102
1103 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1104                 struct irb *irb)
1105 {
1106         int rc;
1107         int cstat, dstat;
1108         struct qeth_cmd_buffer *buffer;
1109         struct qeth_channel *channel;
1110         struct qeth_card *card;
1111         struct qeth_cmd_buffer *iob;
1112         __u8 index;
1113
1114         if (__qeth_check_irb_error(cdev, intparm, irb))
1115                 return;
1116         cstat = irb->scsw.cmd.cstat;
1117         dstat = irb->scsw.cmd.dstat;
1118
1119         card = CARD_FROM_CDEV(cdev);
1120         if (!card)
1121                 return;
1122
1123         QETH_CARD_TEXT(card, 5, "irq");
1124
1125         if (card->read.ccwdev == cdev) {
1126                 channel = &card->read;
1127                 QETH_CARD_TEXT(card, 5, "read");
1128         } else if (card->write.ccwdev == cdev) {
1129                 channel = &card->write;
1130                 QETH_CARD_TEXT(card, 5, "write");
1131         } else {
1132                 channel = &card->data;
1133                 QETH_CARD_TEXT(card, 5, "data");
1134         }
1135         atomic_set(&channel->irq_pending, 0);
1136
1137         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1138                 channel->state = CH_STATE_STOPPED;
1139
1140         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1141                 channel->state = CH_STATE_HALTED;
1142
1143         /*let's wake up immediately on data channel*/
1144         if ((channel == &card->data) && (intparm != 0) &&
1145             (intparm != QETH_RCD_PARM))
1146                 goto out;
1147
1148         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1149                 QETH_CARD_TEXT(card, 6, "clrchpar");
1150                 /* we don't have to handle this further */
1151                 intparm = 0;
1152         }
1153         if (intparm == QETH_HALT_CHANNEL_PARM) {
1154                 QETH_CARD_TEXT(card, 6, "hltchpar");
1155                 /* we don't have to handle this further */
1156                 intparm = 0;
1157         }
1158         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1159             (dstat & DEV_STAT_UNIT_CHECK) ||
1160             (cstat)) {
1161                 if (irb->esw.esw0.erw.cons) {
1162                         dev_warn(&channel->ccwdev->dev,
1163                                 "The qeth device driver failed to recover "
1164                                 "an error on the device\n");
1165                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1166                                 "0x%X dstat 0x%X\n",
1167                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1168                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1169                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1170                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1171                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1172                 }
1173                 if (intparm == QETH_RCD_PARM) {
1174                         channel->state = CH_STATE_DOWN;
1175                         goto out;
1176                 }
1177                 rc = qeth_get_problem(cdev, irb);
1178                 if (rc) {
1179                         card->read_or_write_problem = 1;
1180                         qeth_clear_ipacmd_list(card);
1181                         qeth_schedule_recovery(card);
1182                         goto out;
1183                 }
1184         }
1185
1186         if (intparm == QETH_RCD_PARM) {
1187                 channel->state = CH_STATE_RCD_DONE;
1188                 goto out;
1189         }
1190         if (intparm) {
1191                 buffer = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1192                 buffer->state = BUF_STATE_PROCESSED;
1193         }
1194         if (channel == &card->data)
1195                 return;
1196         if (channel == &card->read &&
1197             channel->state == CH_STATE_UP)
1198                 __qeth_issue_next_read(card);
1199
1200         iob = channel->iob;
1201         index = channel->buf_no;
1202         while (iob[index].state == BUF_STATE_PROCESSED) {
1203                 if (iob[index].callback != NULL)
1204                         iob[index].callback(channel, iob + index);
1205
1206                 index = (index + 1) % QETH_CMD_BUFFER_NO;
1207         }
1208         channel->buf_no = index;
1209 out:
1210         wake_up(&card->wait_q);
1211         return;
1212 }
1213
1214 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1215                 struct qeth_qdio_out_buffer *buf,
1216                 enum iucv_tx_notify notification)
1217 {
1218         struct sk_buff *skb;
1219
1220         if (skb_queue_empty(&buf->skb_list))
1221                 goto out;
1222         skb = skb_peek(&buf->skb_list);
1223         while (skb) {
1224                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1225                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1226                 if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1227                         if (skb->sk) {
1228                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1229                                 iucv->sk_txnotify(skb, notification);
1230                         }
1231                 }
1232                 if (skb_queue_is_last(&buf->skb_list, skb))
1233                         skb = NULL;
1234                 else
1235                         skb = skb_queue_next(&buf->skb_list, skb);
1236         }
1237 out:
1238         return;
1239 }
1240
1241 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1242 {
1243         struct sk_buff *skb;
1244         struct iucv_sock *iucv;
1245         int notify_general_error = 0;
1246
1247         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1248                 notify_general_error = 1;
1249
1250         /* release may never happen from within CQ tasklet scope */
1251         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1252
1253         skb = skb_dequeue(&buf->skb_list);
1254         while (skb) {
1255                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1256                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1257                 if (notify_general_error &&
1258                     be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1259                         if (skb->sk) {
1260                                 iucv = iucv_sk(skb->sk);
1261                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1262                         }
1263                 }
1264                 refcount_dec(&skb->users);
1265                 dev_kfree_skb_any(skb);
1266                 skb = skb_dequeue(&buf->skb_list);
1267         }
1268 }
1269
1270 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1271                 struct qeth_qdio_out_buffer *buf,
1272                 enum qeth_qdio_buffer_states newbufstate)
1273 {
1274         int i;
1275
1276         /* is PCI flag set on buffer? */
1277         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1278                 atomic_dec(&queue->set_pci_flags_count);
1279
1280         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1281                 qeth_release_skbs(buf);
1282         }
1283         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1284                 if (buf->buffer->element[i].addr && buf->is_header[i])
1285                         kmem_cache_free(qeth_core_header_cache,
1286                                 buf->buffer->element[i].addr);
1287                 buf->is_header[i] = 0;
1288                 buf->buffer->element[i].length = 0;
1289                 buf->buffer->element[i].addr = NULL;
1290                 buf->buffer->element[i].eflags = 0;
1291                 buf->buffer->element[i].sflags = 0;
1292         }
1293         buf->buffer->element[15].eflags = 0;
1294         buf->buffer->element[15].sflags = 0;
1295         buf->next_element_to_fill = 0;
1296         atomic_set(&buf->state, newbufstate);
1297 }
1298
1299 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1300 {
1301         int j;
1302
1303         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1304                 if (!q->bufs[j])
1305                         continue;
1306                 qeth_cleanup_handled_pending(q, j, 1);
1307                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1308                 if (free) {
1309                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1310                         q->bufs[j] = NULL;
1311                 }
1312         }
1313 }
1314
1315 void qeth_clear_qdio_buffers(struct qeth_card *card)
1316 {
1317         int i;
1318
1319         QETH_CARD_TEXT(card, 2, "clearqdbf");
1320         /* clear outbound buffers to free skbs */
1321         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1322                 if (card->qdio.out_qs[i]) {
1323                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1324                 }
1325         }
1326 }
1327 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1328
1329 static void qeth_free_buffer_pool(struct qeth_card *card)
1330 {
1331         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1332         int i = 0;
1333         list_for_each_entry_safe(pool_entry, tmp,
1334                                  &card->qdio.init_pool.entry_list, init_list){
1335                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1336                         free_page((unsigned long)pool_entry->elements[i]);
1337                 list_del(&pool_entry->init_list);
1338                 kfree(pool_entry);
1339         }
1340 }
1341
1342 static void qeth_clean_channel(struct qeth_channel *channel)
1343 {
1344         int cnt;
1345
1346         QETH_DBF_TEXT(SETUP, 2, "freech");
1347         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1348                 kfree(channel->iob[cnt].data);
1349 }
1350
1351 static void qeth_set_single_write_queues(struct qeth_card *card)
1352 {
1353         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1354             (card->qdio.no_out_queues == 4))
1355                 qeth_free_qdio_buffers(card);
1356
1357         card->qdio.no_out_queues = 1;
1358         if (card->qdio.default_out_queue != 0)
1359                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1360
1361         card->qdio.default_out_queue = 0;
1362 }
1363
1364 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1365 {
1366         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1367             (card->qdio.no_out_queues == 1)) {
1368                 qeth_free_qdio_buffers(card);
1369                 card->qdio.default_out_queue = 2;
1370         }
1371         card->qdio.no_out_queues = 4;
1372 }
1373
1374 static void qeth_update_from_chp_desc(struct qeth_card *card)
1375 {
1376         struct ccw_device *ccwdev;
1377         struct channel_path_desc *chp_dsc;
1378
1379         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1380
1381         ccwdev = card->data.ccwdev;
1382         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1383         if (!chp_dsc)
1384                 goto out;
1385
1386         card->info.func_level = 0x4100 + chp_dsc->desc;
1387         if (card->info.type == QETH_CARD_TYPE_IQD)
1388                 goto out;
1389
1390         /* CHPP field bit 6 == 1 -> single queue */
1391         if ((chp_dsc->chpp & 0x02) == 0x02)
1392                 qeth_set_single_write_queues(card);
1393         else
1394                 qeth_set_multiple_write_queues(card);
1395 out:
1396         kfree(chp_dsc);
1397         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1398         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1399 }
1400
1401 static void qeth_init_qdio_info(struct qeth_card *card)
1402 {
1403         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1404         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1405         /* inbound */
1406         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1407         if (card->info.type == QETH_CARD_TYPE_IQD)
1408                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1409         else
1410                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1411         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1412         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1413         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1414 }
1415
1416 static void qeth_set_intial_options(struct qeth_card *card)
1417 {
1418         card->options.route4.type = NO_ROUTER;
1419         card->options.route6.type = NO_ROUTER;
1420         card->options.fake_broadcast = 0;
1421         card->options.performance_stats = 0;
1422         card->options.rx_sg_cb = QETH_RX_SG_CB;
1423         card->options.isolation = ISOLATION_MODE_NONE;
1424         card->options.cq = QETH_CQ_DISABLED;
1425 }
1426
1427 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1428 {
1429         unsigned long flags;
1430         int rc = 0;
1431
1432         spin_lock_irqsave(&card->thread_mask_lock, flags);
1433         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1434                         (u8) card->thread_start_mask,
1435                         (u8) card->thread_allowed_mask,
1436                         (u8) card->thread_running_mask);
1437         rc = (card->thread_start_mask & thread);
1438         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1439         return rc;
1440 }
1441
1442 static void qeth_start_kernel_thread(struct work_struct *work)
1443 {
1444         struct task_struct *ts;
1445         struct qeth_card *card = container_of(work, struct qeth_card,
1446                                         kernel_thread_starter);
1447         QETH_CARD_TEXT(card , 2, "strthrd");
1448
1449         if (card->read.state != CH_STATE_UP &&
1450             card->write.state != CH_STATE_UP)
1451                 return;
1452         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1453                 ts = kthread_run(card->discipline->recover, (void *)card,
1454                                 "qeth_recover");
1455                 if (IS_ERR(ts)) {
1456                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1457                         qeth_clear_thread_running_bit(card,
1458                                 QETH_RECOVER_THREAD);
1459                 }
1460         }
1461 }
1462
1463 static void qeth_buffer_reclaim_work(struct work_struct *);
1464 static int qeth_setup_card(struct qeth_card *card)
1465 {
1466
1467         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1468         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1469
1470         card->read.state  = CH_STATE_DOWN;
1471         card->write.state = CH_STATE_DOWN;
1472         card->data.state  = CH_STATE_DOWN;
1473         card->state = CARD_STATE_DOWN;
1474         card->lan_online = 0;
1475         card->read_or_write_problem = 0;
1476         card->dev = NULL;
1477         spin_lock_init(&card->vlanlock);
1478         spin_lock_init(&card->mclock);
1479         spin_lock_init(&card->lock);
1480         spin_lock_init(&card->ip_lock);
1481         spin_lock_init(&card->thread_mask_lock);
1482         mutex_init(&card->conf_mutex);
1483         mutex_init(&card->discipline_mutex);
1484         card->thread_start_mask = 0;
1485         card->thread_allowed_mask = 0;
1486         card->thread_running_mask = 0;
1487         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1488         INIT_LIST_HEAD(&card->cmd_waiter_list);
1489         init_waitqueue_head(&card->wait_q);
1490         /* initial options */
1491         qeth_set_intial_options(card);
1492         /* IP address takeover */
1493         INIT_LIST_HEAD(&card->ipato.entries);
1494         card->ipato.enabled = false;
1495         card->ipato.invert4 = false;
1496         card->ipato.invert6 = false;
1497         /* init QDIO stuff */
1498         qeth_init_qdio_info(card);
1499         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1500         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1501         return 0;
1502 }
1503
1504 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1505 {
1506         struct qeth_card *card = container_of(slr, struct qeth_card,
1507                                         qeth_service_level);
1508         if (card->info.mcl_level[0])
1509                 seq_printf(m, "qeth: %s firmware level %s\n",
1510                         CARD_BUS_ID(card), card->info.mcl_level);
1511 }
1512
1513 static struct qeth_card *qeth_alloc_card(void)
1514 {
1515         struct qeth_card *card;
1516
1517         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1518         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1519         if (!card)
1520                 goto out;
1521         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1522         if (qeth_setup_channel(&card->read))
1523                 goto out_ip;
1524         if (qeth_setup_channel(&card->write))
1525                 goto out_channel;
1526         card->options.layer2 = -1;
1527         card->qeth_service_level.seq_print = qeth_core_sl_print;
1528         register_service_level(&card->qeth_service_level);
1529         return card;
1530
1531 out_channel:
1532         qeth_clean_channel(&card->read);
1533 out_ip:
1534         kfree(card);
1535 out:
1536         return NULL;
1537 }
1538
1539 static int qeth_determine_card_type(struct qeth_card *card)
1540 {
1541         int i = 0;
1542
1543         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1544
1545         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1546         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1547         while (known_devices[i][QETH_DEV_MODEL_IND]) {
1548                 if ((CARD_RDEV(card)->id.dev_type ==
1549                                 known_devices[i][QETH_DEV_TYPE_IND]) &&
1550                     (CARD_RDEV(card)->id.dev_model ==
1551                                 known_devices[i][QETH_DEV_MODEL_IND])) {
1552                         card->info.type = known_devices[i][QETH_DEV_MODEL_IND];
1553                         card->qdio.no_out_queues =
1554                                 known_devices[i][QETH_QUEUE_NO_IND];
1555                         card->qdio.no_in_queues = 1;
1556                         card->info.is_multicast_different =
1557                                 known_devices[i][QETH_MULTICAST_IND];
1558                         qeth_update_from_chp_desc(card);
1559                         return 0;
1560                 }
1561                 i++;
1562         }
1563         card->info.type = QETH_CARD_TYPE_UNKNOWN;
1564         dev_err(&card->gdev->dev, "The adapter hardware is of an "
1565                 "unknown type\n");
1566         return -ENOENT;
1567 }
1568
1569 static int qeth_clear_channel(struct qeth_channel *channel)
1570 {
1571         unsigned long flags;
1572         struct qeth_card *card;
1573         int rc;
1574
1575         card = CARD_FROM_CDEV(channel->ccwdev);
1576         QETH_CARD_TEXT(card, 3, "clearch");
1577         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1578         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1579         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1580
1581         if (rc)
1582                 return rc;
1583         rc = wait_event_interruptible_timeout(card->wait_q,
1584                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1585         if (rc == -ERESTARTSYS)
1586                 return rc;
1587         if (channel->state != CH_STATE_STOPPED)
1588                 return -ETIME;
1589         channel->state = CH_STATE_DOWN;
1590         return 0;
1591 }
1592
1593 static int qeth_halt_channel(struct qeth_channel *channel)
1594 {
1595         unsigned long flags;
1596         struct qeth_card *card;
1597         int rc;
1598
1599         card = CARD_FROM_CDEV(channel->ccwdev);
1600         QETH_CARD_TEXT(card, 3, "haltch");
1601         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1602         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1603         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1604
1605         if (rc)
1606                 return rc;
1607         rc = wait_event_interruptible_timeout(card->wait_q,
1608                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1609         if (rc == -ERESTARTSYS)
1610                 return rc;
1611         if (channel->state != CH_STATE_HALTED)
1612                 return -ETIME;
1613         return 0;
1614 }
1615
1616 static int qeth_halt_channels(struct qeth_card *card)
1617 {
1618         int rc1 = 0, rc2 = 0, rc3 = 0;
1619
1620         QETH_CARD_TEXT(card, 3, "haltchs");
1621         rc1 = qeth_halt_channel(&card->read);
1622         rc2 = qeth_halt_channel(&card->write);
1623         rc3 = qeth_halt_channel(&card->data);
1624         if (rc1)
1625                 return rc1;
1626         if (rc2)
1627                 return rc2;
1628         return rc3;
1629 }
1630
1631 static int qeth_clear_channels(struct qeth_card *card)
1632 {
1633         int rc1 = 0, rc2 = 0, rc3 = 0;
1634
1635         QETH_CARD_TEXT(card, 3, "clearchs");
1636         rc1 = qeth_clear_channel(&card->read);
1637         rc2 = qeth_clear_channel(&card->write);
1638         rc3 = qeth_clear_channel(&card->data);
1639         if (rc1)
1640                 return rc1;
1641         if (rc2)
1642                 return rc2;
1643         return rc3;
1644 }
1645
1646 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1647 {
1648         int rc = 0;
1649
1650         QETH_CARD_TEXT(card, 3, "clhacrd");
1651
1652         if (halt)
1653                 rc = qeth_halt_channels(card);
1654         if (rc)
1655                 return rc;
1656         return qeth_clear_channels(card);
1657 }
1658
1659 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1660 {
1661         int rc = 0;
1662
1663         QETH_CARD_TEXT(card, 3, "qdioclr");
1664         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1665                 QETH_QDIO_CLEANING)) {
1666         case QETH_QDIO_ESTABLISHED:
1667                 if (card->info.type == QETH_CARD_TYPE_IQD)
1668                         rc = qdio_shutdown(CARD_DDEV(card),
1669                                 QDIO_FLAG_CLEANUP_USING_HALT);
1670                 else
1671                         rc = qdio_shutdown(CARD_DDEV(card),
1672                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1673                 if (rc)
1674                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1675                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1676                 break;
1677         case QETH_QDIO_CLEANING:
1678                 return rc;
1679         default:
1680                 break;
1681         }
1682         rc = qeth_clear_halt_card(card, use_halt);
1683         if (rc)
1684                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1685         card->state = CARD_STATE_DOWN;
1686         return rc;
1687 }
1688 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1689
1690 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1691                                int *length)
1692 {
1693         struct ciw *ciw;
1694         char *rcd_buf;
1695         int ret;
1696         struct qeth_channel *channel = &card->data;
1697         unsigned long flags;
1698
1699         /*
1700          * scan for RCD command in extended SenseID data
1701          */
1702         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1703         if (!ciw || ciw->cmd == 0)
1704                 return -EOPNOTSUPP;
1705         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1706         if (!rcd_buf)
1707                 return -ENOMEM;
1708
1709         channel->ccw.cmd_code = ciw->cmd;
1710         channel->ccw.cda = (__u32) __pa(rcd_buf);
1711         channel->ccw.count = ciw->count;
1712         channel->ccw.flags = CCW_FLAG_SLI;
1713         channel->state = CH_STATE_RCD;
1714         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1715         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1716                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1717                                        QETH_RCD_TIMEOUT);
1718         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1719         if (!ret)
1720                 wait_event(card->wait_q,
1721                            (channel->state == CH_STATE_RCD_DONE ||
1722                             channel->state == CH_STATE_DOWN));
1723         if (channel->state == CH_STATE_DOWN)
1724                 ret = -EIO;
1725         else
1726                 channel->state = CH_STATE_DOWN;
1727         if (ret) {
1728                 kfree(rcd_buf);
1729                 *buffer = NULL;
1730                 *length = 0;
1731         } else {
1732                 *length = ciw->count;
1733                 *buffer = rcd_buf;
1734         }
1735         return ret;
1736 }
1737
1738 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1739 {
1740         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1741         card->info.chpid = prcd[30];
1742         card->info.unit_addr2 = prcd[31];
1743         card->info.cula = prcd[63];
1744         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1745                                (prcd[0x11] == _ascebc['M']));
1746 }
1747
1748 /* Determine whether the device requires a specific layer discipline */
1749 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1750 {
1751         if (card->info.type == QETH_CARD_TYPE_OSM ||
1752             card->info.type == QETH_CARD_TYPE_OSN) {
1753                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1754                 return QETH_DISCIPLINE_LAYER2;
1755         }
1756
1757         /* virtual HiperSocket is L3 only: */
1758         if (card->info.guestlan && card->info.type == QETH_CARD_TYPE_IQD) {
1759                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1760                 return QETH_DISCIPLINE_LAYER3;
1761         }
1762
1763         QETH_DBF_TEXT(SETUP, 3, "force no");
1764         return QETH_DISCIPLINE_UNDETERMINED;
1765 }
1766
1767 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1768 {
1769         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1770
1771         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1772             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1773                 card->info.blkt.time_total = 0;
1774                 card->info.blkt.inter_packet = 0;
1775                 card->info.blkt.inter_packet_jumbo = 0;
1776         } else {
1777                 card->info.blkt.time_total = 250;
1778                 card->info.blkt.inter_packet = 5;
1779                 card->info.blkt.inter_packet_jumbo = 15;
1780         }
1781 }
1782
1783 static void qeth_init_tokens(struct qeth_card *card)
1784 {
1785         card->token.issuer_rm_w = 0x00010103UL;
1786         card->token.cm_filter_w = 0x00010108UL;
1787         card->token.cm_connection_w = 0x0001010aUL;
1788         card->token.ulp_filter_w = 0x0001010bUL;
1789         card->token.ulp_connection_w = 0x0001010dUL;
1790 }
1791
1792 static void qeth_init_func_level(struct qeth_card *card)
1793 {
1794         switch (card->info.type) {
1795         case QETH_CARD_TYPE_IQD:
1796                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1797                 break;
1798         case QETH_CARD_TYPE_OSD:
1799         case QETH_CARD_TYPE_OSN:
1800                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1801                 break;
1802         default:
1803                 break;
1804         }
1805 }
1806
1807 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1808                 void (*idx_reply_cb)(struct qeth_channel *,
1809                         struct qeth_cmd_buffer *))
1810 {
1811         struct qeth_cmd_buffer *iob;
1812         unsigned long flags;
1813         int rc;
1814         struct qeth_card *card;
1815
1816         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1817         card = CARD_FROM_CDEV(channel->ccwdev);
1818         iob = qeth_get_buffer(channel);
1819         if (!iob)
1820                 return -ENOMEM;
1821         iob->callback = idx_reply_cb;
1822         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1823         channel->ccw.count = QETH_BUFSIZE;
1824         channel->ccw.cda = (__u32) __pa(iob->data);
1825
1826         wait_event(card->wait_q,
1827                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1828         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1829         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1830         rc = ccw_device_start(channel->ccwdev,
1831                               &channel->ccw, (addr_t) iob, 0, 0);
1832         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1833
1834         if (rc) {
1835                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1836                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1837                 atomic_set(&channel->irq_pending, 0);
1838                 wake_up(&card->wait_q);
1839                 return rc;
1840         }
1841         rc = wait_event_interruptible_timeout(card->wait_q,
1842                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1843         if (rc == -ERESTARTSYS)
1844                 return rc;
1845         if (channel->state != CH_STATE_UP) {
1846                 rc = -ETIME;
1847                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1848                 qeth_clear_cmd_buffers(channel);
1849         } else
1850                 rc = 0;
1851         return rc;
1852 }
1853
1854 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1855                 void (*idx_reply_cb)(struct qeth_channel *,
1856                         struct qeth_cmd_buffer *))
1857 {
1858         struct qeth_card *card;
1859         struct qeth_cmd_buffer *iob;
1860         unsigned long flags;
1861         __u16 temp;
1862         __u8 tmp;
1863         int rc;
1864         struct ccw_dev_id temp_devid;
1865
1866         card = CARD_FROM_CDEV(channel->ccwdev);
1867
1868         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1869
1870         iob = qeth_get_buffer(channel);
1871         if (!iob)
1872                 return -ENOMEM;
1873         iob->callback = idx_reply_cb;
1874         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1875         channel->ccw.count = IDX_ACTIVATE_SIZE;
1876         channel->ccw.cda = (__u32) __pa(iob->data);
1877         if (channel == &card->write) {
1878                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1879                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1880                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1881                 card->seqno.trans_hdr++;
1882         } else {
1883                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1884                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1885                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1886         }
1887         tmp = ((__u8)card->info.portno) | 0x80;
1888         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1889         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1890                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1891         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1892                &card->info.func_level, sizeof(__u16));
1893         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1894         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1895         temp = (card->info.cula << 8) + card->info.unit_addr2;
1896         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1897
1898         wait_event(card->wait_q,
1899                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1900         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1901         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1902         rc = ccw_device_start(channel->ccwdev,
1903                               &channel->ccw, (addr_t) iob, 0, 0);
1904         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1905
1906         if (rc) {
1907                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1908                         rc);
1909                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1910                 atomic_set(&channel->irq_pending, 0);
1911                 wake_up(&card->wait_q);
1912                 return rc;
1913         }
1914         rc = wait_event_interruptible_timeout(card->wait_q,
1915                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1916         if (rc == -ERESTARTSYS)
1917                 return rc;
1918         if (channel->state != CH_STATE_ACTIVATING) {
1919                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1920                         " failed to recover an error on the device\n");
1921                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1922                         dev_name(&channel->ccwdev->dev));
1923                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1924                 qeth_clear_cmd_buffers(channel);
1925                 return -ETIME;
1926         }
1927         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1928 }
1929
1930 static int qeth_peer_func_level(int level)
1931 {
1932         if ((level & 0xff) == 8)
1933                 return (level & 0xff) + 0x400;
1934         if (((level >> 8) & 3) == 1)
1935                 return (level & 0xff) + 0x200;
1936         return level;
1937 }
1938
1939 static void qeth_idx_write_cb(struct qeth_channel *channel,
1940                 struct qeth_cmd_buffer *iob)
1941 {
1942         struct qeth_card *card;
1943         __u16 temp;
1944
1945         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1946
1947         if (channel->state == CH_STATE_DOWN) {
1948                 channel->state = CH_STATE_ACTIVATING;
1949                 goto out;
1950         }
1951         card = CARD_FROM_CDEV(channel->ccwdev);
1952
1953         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1954                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1955                         dev_err(&card->write.ccwdev->dev,
1956                                 "The adapter is used exclusively by another "
1957                                 "host\n");
1958                 else
1959                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1960                                 " negative reply\n",
1961                                 dev_name(&card->write.ccwdev->dev));
1962                 goto out;
1963         }
1964         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1965         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1966                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1967                         "function level mismatch (sent: 0x%x, received: "
1968                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
1969                         card->info.func_level, temp);
1970                 goto out;
1971         }
1972         channel->state = CH_STATE_UP;
1973 out:
1974         qeth_release_buffer(channel, iob);
1975 }
1976
1977 static void qeth_idx_read_cb(struct qeth_channel *channel,
1978                 struct qeth_cmd_buffer *iob)
1979 {
1980         struct qeth_card *card;
1981         __u16 temp;
1982
1983         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1984         if (channel->state == CH_STATE_DOWN) {
1985                 channel->state = CH_STATE_ACTIVATING;
1986                 goto out;
1987         }
1988
1989         card = CARD_FROM_CDEV(channel->ccwdev);
1990         if (qeth_check_idx_response(card, iob->data))
1991                         goto out;
1992
1993         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1994                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1995                 case QETH_IDX_ACT_ERR_EXCL:
1996                         dev_err(&card->write.ccwdev->dev,
1997                                 "The adapter is used exclusively by another "
1998                                 "host\n");
1999                         break;
2000                 case QETH_IDX_ACT_ERR_AUTH:
2001                 case QETH_IDX_ACT_ERR_AUTH_USER:
2002                         dev_err(&card->read.ccwdev->dev,
2003                                 "Setting the device online failed because of "
2004                                 "insufficient authorization\n");
2005                         break;
2006                 default:
2007                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2008                                 " negative reply\n",
2009                                 dev_name(&card->read.ccwdev->dev));
2010                 }
2011                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2012                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2013                 goto out;
2014         }
2015
2016         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2017         if (temp != qeth_peer_func_level(card->info.func_level)) {
2018                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2019                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2020                         dev_name(&card->read.ccwdev->dev),
2021                         card->info.func_level, temp);
2022                 goto out;
2023         }
2024         memcpy(&card->token.issuer_rm_r,
2025                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2026                QETH_MPC_TOKEN_LENGTH);
2027         memcpy(&card->info.mcl_level[0],
2028                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2029         channel->state = CH_STATE_UP;
2030 out:
2031         qeth_release_buffer(channel, iob);
2032 }
2033
2034 void qeth_prepare_control_data(struct qeth_card *card, int len,
2035                 struct qeth_cmd_buffer *iob)
2036 {
2037         qeth_setup_ccw(&card->write, iob->data, len);
2038         iob->callback = qeth_release_buffer;
2039
2040         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2041                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2042         card->seqno.trans_hdr++;
2043         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2044                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2045         card->seqno.pdu_hdr++;
2046         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2047                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2048         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2049 }
2050 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2051
2052 /**
2053  * qeth_send_control_data() -   send control command to the card
2054  * @card:                       qeth_card structure pointer
2055  * @len:                        size of the command buffer
2056  * @iob:                        qeth_cmd_buffer pointer
2057  * @reply_cb:                   callback function pointer
2058  * @cb_card:                    pointer to the qeth_card structure
2059  * @cb_reply:                   pointer to the qeth_reply structure
2060  * @cb_cmd:                     pointer to the original iob for non-IPA
2061  *                              commands, or to the qeth_ipa_cmd structure
2062  *                              for the IPA commands.
2063  * @reply_param:                private pointer passed to the callback
2064  *
2065  * Returns the value of the `return_code' field of the response
2066  * block returned from the hardware, or other error indication.
2067  * Value of zero indicates successful execution of the command.
2068  *
2069  * Callback function gets called one or more times, with cb_cmd
2070  * pointing to the response returned by the hardware. Callback
2071  * function must return non-zero if more reply blocks are expected,
2072  * and zero if the last or only reply block is received. Callback
2073  * function can get the value of the reply_param pointer from the
2074  * field 'param' of the structure qeth_reply.
2075  */
2076
2077 int qeth_send_control_data(struct qeth_card *card, int len,
2078                 struct qeth_cmd_buffer *iob,
2079                 int (*reply_cb)(struct qeth_card *cb_card,
2080                                 struct qeth_reply *cb_reply,
2081                                 unsigned long cb_cmd),
2082                 void *reply_param)
2083 {
2084         int rc;
2085         unsigned long flags;
2086         struct qeth_reply *reply = NULL;
2087         unsigned long timeout, event_timeout;
2088         struct qeth_ipa_cmd *cmd = NULL;
2089
2090         QETH_CARD_TEXT(card, 2, "sendctl");
2091
2092         if (card->read_or_write_problem) {
2093                 qeth_release_buffer(iob->channel, iob);
2094                 return -EIO;
2095         }
2096         reply = qeth_alloc_reply(card);
2097         if (!reply) {
2098                 return -ENOMEM;
2099         }
2100         reply->callback = reply_cb;
2101         reply->param = reply_param;
2102
2103         init_waitqueue_head(&reply->wait_q);
2104         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2105
2106         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2107
2108         if (IS_IPA(iob->data)) {
2109                 cmd = __ipa_cmd(iob);
2110                 cmd->hdr.seqno = card->seqno.ipa++;
2111                 reply->seqno = cmd->hdr.seqno;
2112                 event_timeout = QETH_IPA_TIMEOUT;
2113         } else {
2114                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2115                 event_timeout = QETH_TIMEOUT;
2116         }
2117         qeth_prepare_control_data(card, len, iob);
2118
2119         spin_lock_irqsave(&card->lock, flags);
2120         list_add_tail(&reply->list, &card->cmd_waiter_list);
2121         spin_unlock_irqrestore(&card->lock, flags);
2122
2123         timeout = jiffies + event_timeout;
2124
2125         QETH_CARD_TEXT(card, 6, "noirqpnd");
2126         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2127         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
2128                               (addr_t) iob, 0, 0);
2129         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2130         if (rc) {
2131                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2132                         "ccw_device_start rc = %i\n",
2133                         dev_name(&card->write.ccwdev->dev), rc);
2134                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2135                 spin_lock_irqsave(&card->lock, flags);
2136                 list_del_init(&reply->list);
2137                 qeth_put_reply(reply);
2138                 spin_unlock_irqrestore(&card->lock, flags);
2139                 qeth_release_buffer(iob->channel, iob);
2140                 atomic_set(&card->write.irq_pending, 0);
2141                 wake_up(&card->wait_q);
2142                 return rc;
2143         }
2144
2145         /* we have only one long running ipassist, since we can ensure
2146            process context of this command we can sleep */
2147         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2148             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2149                 if (!wait_event_timeout(reply->wait_q,
2150                     atomic_read(&reply->received), event_timeout))
2151                         goto time_err;
2152         } else {
2153                 while (!atomic_read(&reply->received)) {
2154                         if (time_after(jiffies, timeout))
2155                                 goto time_err;
2156                         cpu_relax();
2157                 }
2158         }
2159
2160         if (reply->rc == -EIO)
2161                 goto error;
2162         rc = reply->rc;
2163         qeth_put_reply(reply);
2164         return rc;
2165
2166 time_err:
2167         reply->rc = -ETIME;
2168         spin_lock_irqsave(&reply->card->lock, flags);
2169         list_del_init(&reply->list);
2170         spin_unlock_irqrestore(&reply->card->lock, flags);
2171         atomic_inc(&reply->received);
2172 error:
2173         atomic_set(&card->write.irq_pending, 0);
2174         qeth_release_buffer(iob->channel, iob);
2175         card->write.buf_no = (card->write.buf_no + 1) % QETH_CMD_BUFFER_NO;
2176         rc = reply->rc;
2177         qeth_put_reply(reply);
2178         return rc;
2179 }
2180 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2181
2182 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2183                 unsigned long data)
2184 {
2185         struct qeth_cmd_buffer *iob;
2186
2187         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2188
2189         iob = (struct qeth_cmd_buffer *) data;
2190         memcpy(&card->token.cm_filter_r,
2191                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2192                QETH_MPC_TOKEN_LENGTH);
2193         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2194         return 0;
2195 }
2196
2197 static int qeth_cm_enable(struct qeth_card *card)
2198 {
2199         int rc;
2200         struct qeth_cmd_buffer *iob;
2201
2202         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2203
2204         iob = qeth_wait_for_buffer(&card->write);
2205         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2206         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2207                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2208         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2209                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2210
2211         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2212                                     qeth_cm_enable_cb, NULL);
2213         return rc;
2214 }
2215
2216 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2217                 unsigned long data)
2218 {
2219
2220         struct qeth_cmd_buffer *iob;
2221
2222         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2223
2224         iob = (struct qeth_cmd_buffer *) data;
2225         memcpy(&card->token.cm_connection_r,
2226                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2227                QETH_MPC_TOKEN_LENGTH);
2228         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2229         return 0;
2230 }
2231
2232 static int qeth_cm_setup(struct qeth_card *card)
2233 {
2234         int rc;
2235         struct qeth_cmd_buffer *iob;
2236
2237         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2238
2239         iob = qeth_wait_for_buffer(&card->write);
2240         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2241         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2242                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2243         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2244                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2245         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2246                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2247         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2248                                     qeth_cm_setup_cb, NULL);
2249         return rc;
2250
2251 }
2252
2253 static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2254 {
2255         switch (card->info.type) {
2256         case QETH_CARD_TYPE_UNKNOWN:
2257                 return 1500;
2258         case QETH_CARD_TYPE_IQD:
2259                 return card->info.max_mtu;
2260         case QETH_CARD_TYPE_OSD:
2261                 switch (card->info.link_type) {
2262                 case QETH_LINK_TYPE_HSTR:
2263                 case QETH_LINK_TYPE_LANE_TR:
2264                         return 2000;
2265                 default:
2266                         return card->options.layer2 ? 1500 : 1492;
2267                 }
2268         case QETH_CARD_TYPE_OSM:
2269         case QETH_CARD_TYPE_OSX:
2270                 return card->options.layer2 ? 1500 : 1492;
2271         default:
2272                 return 1500;
2273         }
2274 }
2275
2276 static int qeth_get_mtu_outof_framesize(int framesize)
2277 {
2278         switch (framesize) {
2279         case 0x4000:
2280                 return 8192;
2281         case 0x6000:
2282                 return 16384;
2283         case 0xa000:
2284                 return 32768;
2285         case 0xffff:
2286                 return 57344;
2287         default:
2288                 return 0;
2289         }
2290 }
2291
2292 static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2293 {
2294         switch (card->info.type) {
2295         case QETH_CARD_TYPE_OSD:
2296         case QETH_CARD_TYPE_OSM:
2297         case QETH_CARD_TYPE_OSX:
2298         case QETH_CARD_TYPE_IQD:
2299                 return ((mtu >= 576) &&
2300                         (mtu <= card->info.max_mtu));
2301         case QETH_CARD_TYPE_OSN:
2302         case QETH_CARD_TYPE_UNKNOWN:
2303         default:
2304                 return 1;
2305         }
2306 }
2307
2308 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2309                 unsigned long data)
2310 {
2311
2312         __u16 mtu, framesize;
2313         __u16 len;
2314         __u8 link_type;
2315         struct qeth_cmd_buffer *iob;
2316
2317         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2318
2319         iob = (struct qeth_cmd_buffer *) data;
2320         memcpy(&card->token.ulp_filter_r,
2321                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2322                QETH_MPC_TOKEN_LENGTH);
2323         if (card->info.type == QETH_CARD_TYPE_IQD) {
2324                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2325                 mtu = qeth_get_mtu_outof_framesize(framesize);
2326                 if (!mtu) {
2327                         iob->rc = -EINVAL;
2328                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2329                         return 0;
2330                 }
2331                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2332                         /* frame size has changed */
2333                         if (card->dev &&
2334                             ((card->dev->mtu == card->info.initial_mtu) ||
2335                              (card->dev->mtu > mtu)))
2336                                 card->dev->mtu = mtu;
2337                         qeth_free_qdio_buffers(card);
2338                 }
2339                 card->info.initial_mtu = mtu;
2340                 card->info.max_mtu = mtu;
2341                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2342         } else {
2343                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2344                         iob->data);
2345                 card->info.initial_mtu = min(card->info.max_mtu,
2346                                         qeth_get_initial_mtu_for_card(card));
2347                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2348         }
2349
2350         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2351         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2352                 memcpy(&link_type,
2353                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2354                 card->info.link_type = link_type;
2355         } else
2356                 card->info.link_type = 0;
2357         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2358         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2359         return 0;
2360 }
2361
2362 static int qeth_ulp_enable(struct qeth_card *card)
2363 {
2364         int rc;
2365         char prot_type;
2366         struct qeth_cmd_buffer *iob;
2367
2368         /*FIXME: trace view callbacks*/
2369         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2370
2371         iob = qeth_wait_for_buffer(&card->write);
2372         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2373
2374         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2375                 (__u8) card->info.portno;
2376         if (card->options.layer2)
2377                 if (card->info.type == QETH_CARD_TYPE_OSN)
2378                         prot_type = QETH_PROT_OSN2;
2379                 else
2380                         prot_type = QETH_PROT_LAYER2;
2381         else
2382                 prot_type = QETH_PROT_TCPIP;
2383
2384         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2385         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2386                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2387         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2388                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2389         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2390                                     qeth_ulp_enable_cb, NULL);
2391         return rc;
2392
2393 }
2394
2395 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2396                 unsigned long data)
2397 {
2398         struct qeth_cmd_buffer *iob;
2399
2400         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2401
2402         iob = (struct qeth_cmd_buffer *) data;
2403         memcpy(&card->token.ulp_connection_r,
2404                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2405                QETH_MPC_TOKEN_LENGTH);
2406         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2407                      3)) {
2408                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2409                 dev_err(&card->gdev->dev, "A connection could not be "
2410                         "established because of an OLM limit\n");
2411                 iob->rc = -EMLINK;
2412         }
2413         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2414         return 0;
2415 }
2416
2417 static int qeth_ulp_setup(struct qeth_card *card)
2418 {
2419         int rc;
2420         __u16 temp;
2421         struct qeth_cmd_buffer *iob;
2422         struct ccw_dev_id dev_id;
2423
2424         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2425
2426         iob = qeth_wait_for_buffer(&card->write);
2427         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2428
2429         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2430                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2431         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2432                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2433         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2434                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2435
2436         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2437         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2438         temp = (card->info.cula << 8) + card->info.unit_addr2;
2439         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2440         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2441                                     qeth_ulp_setup_cb, NULL);
2442         return rc;
2443 }
2444
2445 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2446 {
2447         int rc;
2448         struct qeth_qdio_out_buffer *newbuf;
2449
2450         rc = 0;
2451         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2452         if (!newbuf) {
2453                 rc = -ENOMEM;
2454                 goto out;
2455         }
2456         newbuf->buffer = q->qdio_bufs[bidx];
2457         skb_queue_head_init(&newbuf->skb_list);
2458         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2459         newbuf->q = q;
2460         newbuf->aob = NULL;
2461         newbuf->next_pending = q->bufs[bidx];
2462         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2463         q->bufs[bidx] = newbuf;
2464         if (q->bufstates) {
2465                 q->bufstates[bidx].user = newbuf;
2466                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2467                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2468                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2469                                 (long) newbuf->next_pending);
2470         }
2471 out:
2472         return rc;
2473 }
2474
2475 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2476 {
2477         if (!q)
2478                 return;
2479
2480         qeth_clear_outq_buffers(q, 1);
2481         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2482         kfree(q);
2483 }
2484
2485 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2486 {
2487         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2488
2489         if (!q)
2490                 return NULL;
2491
2492         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2493                 kfree(q);
2494                 return NULL;
2495         }
2496         return q;
2497 }
2498
2499 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2500 {
2501         int i, j;
2502
2503         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2504
2505         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2506                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2507                 return 0;
2508
2509         QETH_DBF_TEXT(SETUP, 2, "inq");
2510         card->qdio.in_q = qeth_alloc_qdio_queue();
2511         if (!card->qdio.in_q)
2512                 goto out_nomem;
2513
2514         /* inbound buffer pool */
2515         if (qeth_alloc_buffer_pool(card))
2516                 goto out_freeinq;
2517
2518         /* outbound */
2519         card->qdio.out_qs =
2520                 kzalloc(card->qdio.no_out_queues *
2521                         sizeof(struct qeth_qdio_out_q *), GFP_KERNEL);
2522         if (!card->qdio.out_qs)
2523                 goto out_freepool;
2524         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2525                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2526                 if (!card->qdio.out_qs[i])
2527                         goto out_freeoutq;
2528                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2529                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2530                 card->qdio.out_qs[i]->queue_no = i;
2531                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2532                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2533                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2534                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2535                                 goto out_freeoutqbufs;
2536                 }
2537         }
2538
2539         /* completion */
2540         if (qeth_alloc_cq(card))
2541                 goto out_freeoutq;
2542
2543         return 0;
2544
2545 out_freeoutqbufs:
2546         while (j > 0) {
2547                 --j;
2548                 kmem_cache_free(qeth_qdio_outbuf_cache,
2549                                 card->qdio.out_qs[i]->bufs[j]);
2550                 card->qdio.out_qs[i]->bufs[j] = NULL;
2551         }
2552 out_freeoutq:
2553         while (i > 0)
2554                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2555         kfree(card->qdio.out_qs);
2556         card->qdio.out_qs = NULL;
2557 out_freepool:
2558         qeth_free_buffer_pool(card);
2559 out_freeinq:
2560         qeth_free_qdio_queue(card->qdio.in_q);
2561         card->qdio.in_q = NULL;
2562 out_nomem:
2563         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2564         return -ENOMEM;
2565 }
2566
2567 static void qeth_free_qdio_buffers(struct qeth_card *card)
2568 {
2569         int i, j;
2570
2571         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2572                 QETH_QDIO_UNINITIALIZED)
2573                 return;
2574
2575         qeth_free_cq(card);
2576         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2577         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2578                 if (card->qdio.in_q->bufs[j].rx_skb)
2579                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2580         }
2581         qeth_free_qdio_queue(card->qdio.in_q);
2582         card->qdio.in_q = NULL;
2583         /* inbound buffer pool */
2584         qeth_free_buffer_pool(card);
2585         /* free outbound qdio_qs */
2586         if (card->qdio.out_qs) {
2587                 for (i = 0; i < card->qdio.no_out_queues; i++)
2588                         qeth_free_output_queue(card->qdio.out_qs[i]);
2589                 kfree(card->qdio.out_qs);
2590                 card->qdio.out_qs = NULL;
2591         }
2592 }
2593
2594 static void qeth_create_qib_param_field(struct qeth_card *card,
2595                 char *param_field)
2596 {
2597
2598         param_field[0] = _ascebc['P'];
2599         param_field[1] = _ascebc['C'];
2600         param_field[2] = _ascebc['I'];
2601         param_field[3] = _ascebc['T'];
2602         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2603         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2604         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2605 }
2606
2607 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2608                 char *param_field)
2609 {
2610         param_field[16] = _ascebc['B'];
2611         param_field[17] = _ascebc['L'];
2612         param_field[18] = _ascebc['K'];
2613         param_field[19] = _ascebc['T'];
2614         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2615         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2616         *((unsigned int *) (&param_field[28])) =
2617                 card->info.blkt.inter_packet_jumbo;
2618 }
2619
2620 static int qeth_qdio_activate(struct qeth_card *card)
2621 {
2622         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2623         return qdio_activate(CARD_DDEV(card));
2624 }
2625
2626 static int qeth_dm_act(struct qeth_card *card)
2627 {
2628         int rc;
2629         struct qeth_cmd_buffer *iob;
2630
2631         QETH_DBF_TEXT(SETUP, 2, "dmact");
2632
2633         iob = qeth_wait_for_buffer(&card->write);
2634         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2635
2636         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2637                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2638         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2639                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2640         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2641         return rc;
2642 }
2643
2644 static int qeth_mpc_initialize(struct qeth_card *card)
2645 {
2646         int rc;
2647
2648         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2649
2650         rc = qeth_issue_next_read(card);
2651         if (rc) {
2652                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2653                 return rc;
2654         }
2655         rc = qeth_cm_enable(card);
2656         if (rc) {
2657                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2658                 goto out_qdio;
2659         }
2660         rc = qeth_cm_setup(card);
2661         if (rc) {
2662                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2663                 goto out_qdio;
2664         }
2665         rc = qeth_ulp_enable(card);
2666         if (rc) {
2667                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2668                 goto out_qdio;
2669         }
2670         rc = qeth_ulp_setup(card);
2671         if (rc) {
2672                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2673                 goto out_qdio;
2674         }
2675         rc = qeth_alloc_qdio_buffers(card);
2676         if (rc) {
2677                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2678                 goto out_qdio;
2679         }
2680         rc = qeth_qdio_establish(card);
2681         if (rc) {
2682                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2683                 qeth_free_qdio_buffers(card);
2684                 goto out_qdio;
2685         }
2686         rc = qeth_qdio_activate(card);
2687         if (rc) {
2688                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2689                 goto out_qdio;
2690         }
2691         rc = qeth_dm_act(card);
2692         if (rc) {
2693                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2694                 goto out_qdio;
2695         }
2696
2697         return 0;
2698 out_qdio:
2699         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2700         qdio_free(CARD_DDEV(card));
2701         return rc;
2702 }
2703
2704 void qeth_print_status_message(struct qeth_card *card)
2705 {
2706         switch (card->info.type) {
2707         case QETH_CARD_TYPE_OSD:
2708         case QETH_CARD_TYPE_OSM:
2709         case QETH_CARD_TYPE_OSX:
2710                 /* VM will use a non-zero first character
2711                  * to indicate a HiperSockets like reporting
2712                  * of the level OSA sets the first character to zero
2713                  * */
2714                 if (!card->info.mcl_level[0]) {
2715                         sprintf(card->info.mcl_level, "%02x%02x",
2716                                 card->info.mcl_level[2],
2717                                 card->info.mcl_level[3]);
2718                         break;
2719                 }
2720                 /* fallthrough */
2721         case QETH_CARD_TYPE_IQD:
2722                 if ((card->info.guestlan) ||
2723                     (card->info.mcl_level[0] & 0x80)) {
2724                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2725                                 card->info.mcl_level[0]];
2726                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2727                                 card->info.mcl_level[1]];
2728                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2729                                 card->info.mcl_level[2]];
2730                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2731                                 card->info.mcl_level[3]];
2732                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2733                 }
2734                 break;
2735         default:
2736                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2737         }
2738         dev_info(&card->gdev->dev,
2739                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2740                  qeth_get_cardname(card),
2741                  (card->info.mcl_level[0]) ? " (level: " : "",
2742                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2743                  (card->info.mcl_level[0]) ? ")" : "",
2744                  qeth_get_cardname_short(card));
2745 }
2746 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2747
2748 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2749 {
2750         struct qeth_buffer_pool_entry *entry;
2751
2752         QETH_CARD_TEXT(card, 5, "inwrklst");
2753
2754         list_for_each_entry(entry,
2755                             &card->qdio.init_pool.entry_list, init_list) {
2756                 qeth_put_buffer_pool_entry(card, entry);
2757         }
2758 }
2759
2760 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2761                                         struct qeth_card *card)
2762 {
2763         struct list_head *plh;
2764         struct qeth_buffer_pool_entry *entry;
2765         int i, free;
2766         struct page *page;
2767
2768         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2769                 return NULL;
2770
2771         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2772                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2773                 free = 1;
2774                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2775                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2776                                 free = 0;
2777                                 break;
2778                         }
2779                 }
2780                 if (free) {
2781                         list_del_init(&entry->list);
2782                         return entry;
2783                 }
2784         }
2785
2786         /* no free buffer in pool so take first one and swap pages */
2787         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2788                         struct qeth_buffer_pool_entry, list);
2789         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2790                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2791                         page = alloc_page(GFP_ATOMIC);
2792                         if (!page) {
2793                                 return NULL;
2794                         } else {
2795                                 free_page((unsigned long)entry->elements[i]);
2796                                 entry->elements[i] = page_address(page);
2797                                 if (card->options.performance_stats)
2798                                         card->perf_stats.sg_alloc_page_rx++;
2799                         }
2800                 }
2801         }
2802         list_del_init(&entry->list);
2803         return entry;
2804 }
2805
2806 static int qeth_init_input_buffer(struct qeth_card *card,
2807                 struct qeth_qdio_buffer *buf)
2808 {
2809         struct qeth_buffer_pool_entry *pool_entry;
2810         int i;
2811
2812         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2813                 buf->rx_skb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
2814                 if (!buf->rx_skb)
2815                         return 1;
2816         }
2817
2818         pool_entry = qeth_find_free_buffer_pool_entry(card);
2819         if (!pool_entry)
2820                 return 1;
2821
2822         /*
2823          * since the buffer is accessed only from the input_tasklet
2824          * there shouldn't be a need to synchronize; also, since we use
2825          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2826          * buffers
2827          */
2828
2829         buf->pool_entry = pool_entry;
2830         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2831                 buf->buffer->element[i].length = PAGE_SIZE;
2832                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2833                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2834                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2835                 else
2836                         buf->buffer->element[i].eflags = 0;
2837                 buf->buffer->element[i].sflags = 0;
2838         }
2839         return 0;
2840 }
2841
2842 int qeth_init_qdio_queues(struct qeth_card *card)
2843 {
2844         int i, j;
2845         int rc;
2846
2847         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2848
2849         /* inbound queue */
2850         qdio_reset_buffers(card->qdio.in_q->qdio_bufs,
2851                            QDIO_MAX_BUFFERS_PER_Q);
2852         qeth_initialize_working_pool_list(card);
2853         /*give only as many buffers to hardware as we have buffer pool entries*/
2854         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2855                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2856         card->qdio.in_q->next_buf_to_init =
2857                 card->qdio.in_buf_pool.buf_count - 1;
2858         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2859                      card->qdio.in_buf_pool.buf_count - 1);
2860         if (rc) {
2861                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2862                 return rc;
2863         }
2864
2865         /* completion */
2866         rc = qeth_cq_init(card);
2867         if (rc) {
2868                 return rc;
2869         }
2870
2871         /* outbound queue */
2872         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2873                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2874                                    QDIO_MAX_BUFFERS_PER_Q);
2875                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2876                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2877                                         card->qdio.out_qs[i]->bufs[j],
2878                                         QETH_QDIO_BUF_EMPTY);
2879                 }
2880                 card->qdio.out_qs[i]->card = card;
2881                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2882                 card->qdio.out_qs[i]->do_pack = 0;
2883                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2884                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2885                 atomic_set(&card->qdio.out_qs[i]->state,
2886                            QETH_OUT_Q_UNLOCKED);
2887         }
2888         return 0;
2889 }
2890 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2891
2892 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2893 {
2894         switch (link_type) {
2895         case QETH_LINK_TYPE_HSTR:
2896                 return 2;
2897         default:
2898                 return 1;
2899         }
2900 }
2901
2902 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2903                 struct qeth_ipa_cmd *cmd, __u8 command,
2904                 enum qeth_prot_versions prot)
2905 {
2906         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2907         cmd->hdr.command = command;
2908         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2909         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2910         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2911         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2912         if (card->options.layer2)
2913                 cmd->hdr.prim_version_no = 2;
2914         else
2915                 cmd->hdr.prim_version_no = 1;
2916         cmd->hdr.param_count = 1;
2917         cmd->hdr.prot_version = prot;
2918         cmd->hdr.ipa_supported = 0;
2919         cmd->hdr.ipa_enabled = 0;
2920 }
2921
2922 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2923                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2924 {
2925         struct qeth_cmd_buffer *iob;
2926         struct qeth_ipa_cmd *cmd;
2927
2928         iob = qeth_get_buffer(&card->write);
2929         if (iob) {
2930                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2931                 qeth_fill_ipacmd_header(card, cmd, ipacmd, prot);
2932         } else {
2933                 dev_warn(&card->gdev->dev,
2934                          "The qeth driver ran out of channel command buffers\n");
2935                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2936                                  dev_name(&card->gdev->dev));
2937         }
2938
2939         return iob;
2940 }
2941 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2942
2943 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2944                 char prot_type)
2945 {
2946         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2947         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2948         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2949                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2950 }
2951 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2952
2953 /**
2954  * qeth_send_ipa_cmd() - send an IPA command
2955  *
2956  * See qeth_send_control_data() for explanation of the arguments.
2957  */
2958
2959 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2960                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2961                         unsigned long),
2962                 void *reply_param)
2963 {
2964         int rc;
2965         char prot_type;
2966
2967         QETH_CARD_TEXT(card, 4, "sendipa");
2968
2969         if (card->options.layer2)
2970                 if (card->info.type == QETH_CARD_TYPE_OSN)
2971                         prot_type = QETH_PROT_OSN2;
2972                 else
2973                         prot_type = QETH_PROT_LAYER2;
2974         else
2975                 prot_type = QETH_PROT_TCPIP;
2976         qeth_prepare_ipa_cmd(card, iob, prot_type);
2977         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2978                                                 iob, reply_cb, reply_param);
2979         if (rc == -ETIME) {
2980                 qeth_clear_ipacmd_list(card);
2981                 qeth_schedule_recovery(card);
2982         }
2983         return rc;
2984 }
2985 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2986
2987 static int qeth_send_startlan(struct qeth_card *card)
2988 {
2989         int rc;
2990         struct qeth_cmd_buffer *iob;
2991
2992         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2993
2994         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2995         if (!iob)
2996                 return -ENOMEM;
2997         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
2998         return rc;
2999 }
3000
3001 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3002 {
3003         if (!cmd->hdr.return_code)
3004                 cmd->hdr.return_code =
3005                         cmd->data.setadapterparms.hdr.return_code;
3006         return cmd->hdr.return_code;
3007 }
3008
3009 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3010                 struct qeth_reply *reply, unsigned long data)
3011 {
3012         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3013
3014         QETH_CARD_TEXT(card, 3, "quyadpcb");
3015         if (qeth_setadpparms_inspect_rc(cmd))
3016                 return 0;
3017
3018         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3019                 card->info.link_type =
3020                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3021                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3022         }
3023         card->options.adp.supported_funcs =
3024                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3025         return 0;
3026 }
3027
3028 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3029                 __u32 command, __u32 cmdlen)
3030 {
3031         struct qeth_cmd_buffer *iob;
3032         struct qeth_ipa_cmd *cmd;
3033
3034         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3035                                      QETH_PROT_IPV4);
3036         if (iob) {
3037                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3038                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3039                 cmd->data.setadapterparms.hdr.command_code = command;
3040                 cmd->data.setadapterparms.hdr.used_total = 1;
3041                 cmd->data.setadapterparms.hdr.seq_no = 1;
3042         }
3043
3044         return iob;
3045 }
3046
3047 int qeth_query_setadapterparms(struct qeth_card *card)
3048 {
3049         int rc;
3050         struct qeth_cmd_buffer *iob;
3051
3052         QETH_CARD_TEXT(card, 3, "queryadp");
3053         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3054                                    sizeof(struct qeth_ipacmd_setadpparms));
3055         if (!iob)
3056                 return -ENOMEM;
3057         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3058         return rc;
3059 }
3060 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3061
3062 static int qeth_query_ipassists_cb(struct qeth_card *card,
3063                 struct qeth_reply *reply, unsigned long data)
3064 {
3065         struct qeth_ipa_cmd *cmd;
3066
3067         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3068
3069         cmd = (struct qeth_ipa_cmd *) data;
3070
3071         switch (cmd->hdr.return_code) {
3072         case IPA_RC_NOTSUPP:
3073         case IPA_RC_L2_UNSUPPORTED_CMD:
3074                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3075                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3076                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3077                 return -0;
3078         default:
3079                 if (cmd->hdr.return_code) {
3080                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3081                                                 "rc=%d\n",
3082                                                 dev_name(&card->gdev->dev),
3083                                                 cmd->hdr.return_code);
3084                         return 0;
3085                 }
3086         }
3087
3088         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3089                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3090                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3091         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3092                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3093                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3094         } else
3095                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3096                                         "\n", dev_name(&card->gdev->dev));
3097         return 0;
3098 }
3099
3100 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3101 {
3102         int rc;
3103         struct qeth_cmd_buffer *iob;
3104
3105         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3106         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3107         if (!iob)
3108                 return -ENOMEM;
3109         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3110         return rc;
3111 }
3112 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3113
3114 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3115                                 struct qeth_reply *reply, unsigned long data)
3116 {
3117         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3118         struct qeth_query_switch_attributes *attrs;
3119         struct qeth_switch_info *sw_info;
3120
3121         QETH_CARD_TEXT(card, 2, "qswiatcb");
3122         if (qeth_setadpparms_inspect_rc(cmd))
3123                 return 0;
3124
3125         sw_info = (struct qeth_switch_info *)reply->param;
3126         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3127         sw_info->capabilities = attrs->capabilities;
3128         sw_info->settings = attrs->settings;
3129         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3130                         sw_info->settings);
3131         return 0;
3132 }
3133
3134 int qeth_query_switch_attributes(struct qeth_card *card,
3135                                  struct qeth_switch_info *sw_info)
3136 {
3137         struct qeth_cmd_buffer *iob;
3138
3139         QETH_CARD_TEXT(card, 2, "qswiattr");
3140         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3141                 return -EOPNOTSUPP;
3142         if (!netif_carrier_ok(card->dev))
3143                 return -ENOMEDIUM;
3144         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3145                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3146         if (!iob)
3147                 return -ENOMEM;
3148         return qeth_send_ipa_cmd(card, iob,
3149                                 qeth_query_switch_attributes_cb, sw_info);
3150 }
3151 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3152
3153 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3154                 struct qeth_reply *reply, unsigned long data)
3155 {
3156         struct qeth_ipa_cmd *cmd;
3157         __u16 rc;
3158
3159         cmd = (struct qeth_ipa_cmd *)data;
3160         rc = cmd->hdr.return_code;
3161         if (rc)
3162                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3163         else
3164                 card->info.diagass_support = cmd->data.diagass.ext;
3165         return 0;
3166 }
3167
3168 static int qeth_query_setdiagass(struct qeth_card *card)
3169 {
3170         struct qeth_cmd_buffer *iob;
3171         struct qeth_ipa_cmd    *cmd;
3172
3173         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3174         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3175         if (!iob)
3176                 return -ENOMEM;
3177         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3178         cmd->data.diagass.subcmd_len = 16;
3179         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3180         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3181 }
3182
3183 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3184 {
3185         unsigned long info = get_zeroed_page(GFP_KERNEL);
3186         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3187         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3188         struct ccw_dev_id ccwid;
3189         int level;
3190
3191         tid->chpid = card->info.chpid;
3192         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3193         tid->ssid = ccwid.ssid;
3194         tid->devno = ccwid.devno;
3195         if (!info)
3196                 return;
3197         level = stsi(NULL, 0, 0, 0);
3198         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3199                 tid->lparnr = info222->lpar_number;
3200         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3201                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3202                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3203         }
3204         free_page(info);
3205         return;
3206 }
3207
3208 static int qeth_hw_trap_cb(struct qeth_card *card,
3209                 struct qeth_reply *reply, unsigned long data)
3210 {
3211         struct qeth_ipa_cmd *cmd;
3212         __u16 rc;
3213
3214         cmd = (struct qeth_ipa_cmd *)data;
3215         rc = cmd->hdr.return_code;
3216         if (rc)
3217                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3218         return 0;
3219 }
3220
3221 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3222 {
3223         struct qeth_cmd_buffer *iob;
3224         struct qeth_ipa_cmd *cmd;
3225
3226         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3227         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3228         if (!iob)
3229                 return -ENOMEM;
3230         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
3231         cmd->data.diagass.subcmd_len = 80;
3232         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3233         cmd->data.diagass.type = 1;
3234         cmd->data.diagass.action = action;
3235         switch (action) {
3236         case QETH_DIAGS_TRAP_ARM:
3237                 cmd->data.diagass.options = 0x0003;
3238                 cmd->data.diagass.ext = 0x00010000 +
3239                         sizeof(struct qeth_trap_id);
3240                 qeth_get_trap_id(card,
3241                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3242                 break;
3243         case QETH_DIAGS_TRAP_DISARM:
3244                 cmd->data.diagass.options = 0x0001;
3245                 break;
3246         case QETH_DIAGS_TRAP_CAPTURE:
3247                 break;
3248         }
3249         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3250 }
3251 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3252
3253 static int qeth_check_qdio_errors(struct qeth_card *card,
3254                                   struct qdio_buffer *buf,
3255                                   unsigned int qdio_error,
3256                                   const char *dbftext)
3257 {
3258         if (qdio_error) {
3259                 QETH_CARD_TEXT(card, 2, dbftext);
3260                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3261                                buf->element[15].sflags);
3262                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3263                                buf->element[14].sflags);
3264                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3265                 if ((buf->element[15].sflags) == 0x12) {
3266                         card->stats.rx_dropped++;
3267                         return 0;
3268                 } else
3269                         return 1;
3270         }
3271         return 0;
3272 }
3273
3274 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3275 {
3276         struct qeth_qdio_q *queue = card->qdio.in_q;
3277         struct list_head *lh;
3278         int count;
3279         int i;
3280         int rc;
3281         int newcount = 0;
3282
3283         count = (index < queue->next_buf_to_init)?
3284                 card->qdio.in_buf_pool.buf_count -
3285                 (queue->next_buf_to_init - index) :
3286                 card->qdio.in_buf_pool.buf_count -
3287                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3288         /* only requeue at a certain threshold to avoid SIGAs */
3289         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3290                 for (i = queue->next_buf_to_init;
3291                      i < queue->next_buf_to_init + count; ++i) {
3292                         if (qeth_init_input_buffer(card,
3293                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3294                                 break;
3295                         } else {
3296                                 newcount++;
3297                         }
3298                 }
3299
3300                 if (newcount < count) {
3301                         /* we are in memory shortage so we switch back to
3302                            traditional skb allocation and drop packages */
3303                         atomic_set(&card->force_alloc_skb, 3);
3304                         count = newcount;
3305                 } else {
3306                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3307                 }
3308
3309                 if (!count) {
3310                         i = 0;
3311                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3312                                 i++;
3313                         if (i == card->qdio.in_buf_pool.buf_count) {
3314                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3315                                 card->reclaim_index = index;
3316                                 schedule_delayed_work(
3317                                         &card->buffer_reclaim_work,
3318                                         QETH_RECLAIM_WORK_TIME);
3319                         }
3320                         return;
3321                 }
3322
3323                 /*
3324                  * according to old code it should be avoided to requeue all
3325                  * 128 buffers in order to benefit from PCI avoidance.
3326                  * this function keeps at least one buffer (the buffer at
3327                  * 'index') un-requeued -> this buffer is the first buffer that
3328                  * will be requeued the next time
3329                  */
3330                 if (card->options.performance_stats) {
3331                         card->perf_stats.inbound_do_qdio_cnt++;
3332                         card->perf_stats.inbound_do_qdio_start_time =
3333                                 qeth_get_micros();
3334                 }
3335                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3336                              queue->next_buf_to_init, count);
3337                 if (card->options.performance_stats)
3338                         card->perf_stats.inbound_do_qdio_time +=
3339                                 qeth_get_micros() -
3340                                 card->perf_stats.inbound_do_qdio_start_time;
3341                 if (rc) {
3342                         QETH_CARD_TEXT(card, 2, "qinberr");
3343                 }
3344                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3345                                           QDIO_MAX_BUFFERS_PER_Q;
3346         }
3347 }
3348
3349 static void qeth_buffer_reclaim_work(struct work_struct *work)
3350 {
3351         struct qeth_card *card = container_of(work, struct qeth_card,
3352                 buffer_reclaim_work.work);
3353
3354         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3355         qeth_queue_input_buffer(card, card->reclaim_index);
3356 }
3357
3358 static void qeth_handle_send_error(struct qeth_card *card,
3359                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3360 {
3361         int sbalf15 = buffer->buffer->element[15].sflags;
3362
3363         QETH_CARD_TEXT(card, 6, "hdsnderr");
3364         if (card->info.type == QETH_CARD_TYPE_IQD) {
3365                 if (sbalf15 == 0) {
3366                         qdio_err = 0;
3367                 } else {
3368                         qdio_err = 1;
3369                 }
3370         }
3371         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3372
3373         if (!qdio_err)
3374                 return;
3375
3376         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3377                 return;
3378
3379         QETH_CARD_TEXT(card, 1, "lnkfail");
3380         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3381                        (u16)qdio_err, (u8)sbalf15);
3382 }
3383
3384 /**
3385  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3386  * @queue: queue to check for packing buffer
3387  *
3388  * Returns number of buffers that were prepared for flush.
3389  */
3390 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3391 {
3392         struct qeth_qdio_out_buffer *buffer;
3393
3394         buffer = queue->bufs[queue->next_buf_to_fill];
3395         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3396             (buffer->next_element_to_fill > 0)) {
3397                 /* it's a packing buffer */
3398                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3399                 queue->next_buf_to_fill =
3400                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3401                 return 1;
3402         }
3403         return 0;
3404 }
3405
3406 /*
3407  * Switched to packing state if the number of used buffers on a queue
3408  * reaches a certain limit.
3409  */
3410 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3411 {
3412         if (!queue->do_pack) {
3413                 if (atomic_read(&queue->used_buffers)
3414                     >= QETH_HIGH_WATERMARK_PACK){
3415                         /* switch non-PACKING -> PACKING */
3416                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3417                         if (queue->card->options.performance_stats)
3418                                 queue->card->perf_stats.sc_dp_p++;
3419                         queue->do_pack = 1;
3420                 }
3421         }
3422 }
3423
3424 /*
3425  * Switches from packing to non-packing mode. If there is a packing
3426  * buffer on the queue this buffer will be prepared to be flushed.
3427  * In that case 1 is returned to inform the caller. If no buffer
3428  * has to be flushed, zero is returned.
3429  */
3430 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3431 {
3432         if (queue->do_pack) {
3433                 if (atomic_read(&queue->used_buffers)
3434                     <= QETH_LOW_WATERMARK_PACK) {
3435                         /* switch PACKING -> non-PACKING */
3436                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3437                         if (queue->card->options.performance_stats)
3438                                 queue->card->perf_stats.sc_p_dp++;
3439                         queue->do_pack = 0;
3440                         return qeth_prep_flush_pack_buffer(queue);
3441                 }
3442         }
3443         return 0;
3444 }
3445
3446 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3447                                int count)
3448 {
3449         struct qeth_qdio_out_buffer *buf;
3450         int rc;
3451         int i;
3452         unsigned int qdio_flags;
3453
3454         for (i = index; i < index + count; ++i) {
3455                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3456                 buf = queue->bufs[bidx];
3457                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3458                                 SBAL_EFLAGS_LAST_ENTRY;
3459
3460                 if (queue->bufstates)
3461                         queue->bufstates[bidx].user = buf;
3462
3463                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3464                         continue;
3465
3466                 if (!queue->do_pack) {
3467                         if ((atomic_read(&queue->used_buffers) >=
3468                                 (QETH_HIGH_WATERMARK_PACK -
3469                                  QETH_WATERMARK_PACK_FUZZ)) &&
3470                             !atomic_read(&queue->set_pci_flags_count)) {
3471                                 /* it's likely that we'll go to packing
3472                                  * mode soon */
3473                                 atomic_inc(&queue->set_pci_flags_count);
3474                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3475                         }
3476                 } else {
3477                         if (!atomic_read(&queue->set_pci_flags_count)) {
3478                                 /*
3479                                  * there's no outstanding PCI any more, so we
3480                                  * have to request a PCI to be sure the the PCI
3481                                  * will wake at some time in the future then we
3482                                  * can flush packed buffers that might still be
3483                                  * hanging around, which can happen if no
3484                                  * further send was requested by the stack
3485                                  */
3486                                 atomic_inc(&queue->set_pci_flags_count);
3487                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3488                         }
3489                 }
3490         }
3491
3492         netif_trans_update(queue->card->dev);
3493         if (queue->card->options.performance_stats) {
3494                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3495                 queue->card->perf_stats.outbound_do_qdio_start_time =
3496                         qeth_get_micros();
3497         }
3498         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3499         if (atomic_read(&queue->set_pci_flags_count))
3500                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3501         atomic_add(count, &queue->used_buffers);
3502
3503         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3504                      queue->queue_no, index, count);
3505         if (queue->card->options.performance_stats)
3506                 queue->card->perf_stats.outbound_do_qdio_time +=
3507                         qeth_get_micros() -
3508                         queue->card->perf_stats.outbound_do_qdio_start_time;
3509         if (rc) {
3510                 queue->card->stats.tx_errors += count;
3511                 /* ignore temporary SIGA errors without busy condition */
3512                 if (rc == -ENOBUFS)
3513                         return;
3514                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3515                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3516                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3517                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3518                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3519
3520                 /* this must not happen under normal circumstances. if it
3521                  * happens something is really wrong -> recover */
3522                 qeth_schedule_recovery(queue->card);
3523                 return;
3524         }
3525         if (queue->card->options.performance_stats)
3526                 queue->card->perf_stats.bufs_sent += count;
3527 }
3528
3529 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3530 {
3531         int index;
3532         int flush_cnt = 0;
3533         int q_was_packing = 0;
3534
3535         /*
3536          * check if weed have to switch to non-packing mode or if
3537          * we have to get a pci flag out on the queue
3538          */
3539         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3540             !atomic_read(&queue->set_pci_flags_count)) {
3541                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3542                                 QETH_OUT_Q_UNLOCKED) {
3543                         /*
3544                          * If we get in here, there was no action in
3545                          * do_send_packet. So, we check if there is a
3546                          * packing buffer to be flushed here.
3547                          */
3548                         netif_stop_queue(queue->card->dev);
3549                         index = queue->next_buf_to_fill;
3550                         q_was_packing = queue->do_pack;
3551                         /* queue->do_pack may change */
3552                         barrier();
3553                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3554                         if (!flush_cnt &&
3555                             !atomic_read(&queue->set_pci_flags_count))
3556                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3557                         if (queue->card->options.performance_stats &&
3558                             q_was_packing)
3559                                 queue->card->perf_stats.bufs_sent_pack +=
3560                                         flush_cnt;
3561                         if (flush_cnt)
3562                                 qeth_flush_buffers(queue, index, flush_cnt);
3563                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3564                 }
3565         }
3566 }
3567
3568 void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3569                 unsigned long card_ptr)
3570 {
3571         struct qeth_card *card = (struct qeth_card *)card_ptr;
3572
3573         if (card->dev && (card->dev->flags & IFF_UP))
3574                 napi_schedule(&card->napi);
3575 }
3576 EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
3577
3578 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3579 {
3580         int rc;
3581
3582         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3583                 rc = -1;
3584                 goto out;
3585         } else {
3586                 if (card->options.cq == cq) {
3587                         rc = 0;
3588                         goto out;
3589                 }
3590
3591                 if (card->state != CARD_STATE_DOWN &&
3592                     card->state != CARD_STATE_RECOVER) {
3593                         rc = -1;
3594                         goto out;
3595                 }
3596
3597                 qeth_free_qdio_buffers(card);
3598                 card->options.cq = cq;
3599                 rc = 0;
3600         }
3601 out:
3602         return rc;
3603
3604 }
3605 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3606
3607
3608 static void qeth_qdio_cq_handler(struct qeth_card *card,
3609                 unsigned int qdio_err,
3610                 unsigned int queue, int first_element, int count) {
3611         struct qeth_qdio_q *cq = card->qdio.c_q;
3612         int i;
3613         int rc;
3614
3615         if (!qeth_is_cq(card, queue))
3616                 goto out;
3617
3618         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3619         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3620         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3621
3622         if (qdio_err) {
3623                 netif_stop_queue(card->dev);
3624                 qeth_schedule_recovery(card);
3625                 goto out;
3626         }
3627
3628         if (card->options.performance_stats) {
3629                 card->perf_stats.cq_cnt++;
3630                 card->perf_stats.cq_start_time = qeth_get_micros();
3631         }
3632
3633         for (i = first_element; i < first_element + count; ++i) {
3634                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3635                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3636                 int e;
3637
3638                 e = 0;
3639                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3640                        buffer->element[e].addr) {
3641                         unsigned long phys_aob_addr;
3642
3643                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3644                         qeth_qdio_handle_aob(card, phys_aob_addr);
3645                         buffer->element[e].addr = NULL;
3646                         buffer->element[e].eflags = 0;
3647                         buffer->element[e].sflags = 0;
3648                         buffer->element[e].length = 0;
3649
3650                         ++e;
3651                 }
3652
3653                 buffer->element[15].eflags = 0;
3654                 buffer->element[15].sflags = 0;
3655         }
3656         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3657                     card->qdio.c_q->next_buf_to_init,
3658                     count);
3659         if (rc) {
3660                 dev_warn(&card->gdev->dev,
3661                         "QDIO reported an error, rc=%i\n", rc);
3662                 QETH_CARD_TEXT(card, 2, "qcqherr");
3663         }
3664         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3665                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3666
3667         netif_wake_queue(card->dev);
3668
3669         if (card->options.performance_stats) {
3670                 int delta_t = qeth_get_micros();
3671                 delta_t -= card->perf_stats.cq_start_time;
3672                 card->perf_stats.cq_time += delta_t;
3673         }
3674 out:
3675         return;
3676 }
3677
3678 void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
3679                 unsigned int queue, int first_elem, int count,
3680                 unsigned long card_ptr)
3681 {
3682         struct qeth_card *card = (struct qeth_card *)card_ptr;
3683
3684         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3685         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3686
3687         if (qeth_is_cq(card, queue))
3688                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3689         else if (qdio_err)
3690                 qeth_schedule_recovery(card);
3691
3692
3693 }
3694 EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
3695
3696 void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3697                 unsigned int qdio_error, int __queue, int first_element,
3698                 int count, unsigned long card_ptr)
3699 {
3700         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3701         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3702         struct qeth_qdio_out_buffer *buffer;
3703         int i;
3704
3705         QETH_CARD_TEXT(card, 6, "qdouhdl");
3706         if (qdio_error & QDIO_ERROR_FATAL) {
3707                 QETH_CARD_TEXT(card, 2, "achkcond");
3708                 netif_stop_queue(card->dev);
3709                 qeth_schedule_recovery(card);
3710                 return;
3711         }
3712         if (card->options.performance_stats) {
3713                 card->perf_stats.outbound_handler_cnt++;
3714                 card->perf_stats.outbound_handler_start_time =
3715                         qeth_get_micros();
3716         }
3717         for (i = first_element; i < (first_element + count); ++i) {
3718                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3719                 buffer = queue->bufs[bidx];
3720                 qeth_handle_send_error(card, buffer, qdio_error);
3721
3722                 if (queue->bufstates &&
3723                     (queue->bufstates[bidx].flags &
3724                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3725                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3726
3727                         if (atomic_cmpxchg(&buffer->state,
3728                                            QETH_QDIO_BUF_PRIMED,
3729                                            QETH_QDIO_BUF_PENDING) ==
3730                                 QETH_QDIO_BUF_PRIMED) {
3731                                 qeth_notify_skbs(queue, buffer,
3732                                                  TX_NOTIFY_PENDING);
3733                         }
3734                         buffer->aob = queue->bufstates[bidx].aob;
3735                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3736                         QETH_CARD_TEXT(queue->card, 5, "aob");
3737                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3738                                         virt_to_phys(buffer->aob));
3739                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3740                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3741                                 qeth_schedule_recovery(card);
3742                         }
3743                 } else {
3744                         if (card->options.cq == QETH_CQ_ENABLED) {
3745                                 enum iucv_tx_notify n;
3746
3747                                 n = qeth_compute_cq_notification(
3748                                         buffer->buffer->element[15].sflags, 0);
3749                                 qeth_notify_skbs(queue, buffer, n);
3750                         }
3751
3752                         qeth_clear_output_buffer(queue, buffer,
3753                                                 QETH_QDIO_BUF_EMPTY);
3754                 }
3755                 qeth_cleanup_handled_pending(queue, bidx, 0);
3756         }
3757         atomic_sub(count, &queue->used_buffers);
3758         /* check if we need to do something on this outbound queue */
3759         if (card->info.type != QETH_CARD_TYPE_IQD)
3760                 qeth_check_outbound_queue(queue);
3761
3762         netif_wake_queue(queue->card->dev);
3763         if (card->options.performance_stats)
3764                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3765                         card->perf_stats.outbound_handler_start_time;
3766 }
3767 EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
3768
3769 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3770 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3771 {
3772         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3773                 return 2;
3774         return queue_num;
3775 }
3776
3777 /**
3778  * Note: Function assumes that we have 4 outbound queues.
3779  */
3780 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3781                         int ipv, int cast_type)
3782 {
3783         __be16 *tci;
3784         u8 tos;
3785
3786         if (cast_type && card->info.is_multicast_different)
3787                 return card->info.is_multicast_different &
3788                         (card->qdio.no_out_queues - 1);
3789
3790         switch (card->qdio.do_prio_queueing) {
3791         case QETH_PRIO_Q_ING_TOS:
3792         case QETH_PRIO_Q_ING_PREC:
3793                 switch (ipv) {
3794                 case 4:
3795                         tos = ipv4_get_dsfield(ip_hdr(skb));
3796                         break;
3797                 case 6:
3798                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3799                         break;
3800                 default:
3801                         return card->qdio.default_out_queue;
3802                 }
3803                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3804                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3805                 if (tos & IPTOS_MINCOST)
3806                         return qeth_cut_iqd_prio(card, 3);
3807                 if (tos & IPTOS_RELIABILITY)
3808                         return 2;
3809                 if (tos & IPTOS_THROUGHPUT)
3810                         return 1;
3811                 if (tos & IPTOS_LOWDELAY)
3812                         return 0;
3813                 break;
3814         case QETH_PRIO_Q_ING_SKB:
3815                 if (skb->priority > 5)
3816                         return 0;
3817                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3818         case QETH_PRIO_Q_ING_VLAN:
3819                 tci = &((struct ethhdr *)skb->data)->h_proto;
3820                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3821                         return qeth_cut_iqd_prio(card,
3822                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3823                 break;
3824         default:
3825                 break;
3826         }
3827         return card->qdio.default_out_queue;
3828 }
3829 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3830
3831 /**
3832  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3833  * @skb:                                SKB address
3834  *
3835  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3836  * fragmented part of the SKB. Returns zero for linear SKB.
3837  */
3838 int qeth_get_elements_for_frags(struct sk_buff *skb)
3839 {
3840         int cnt, elements = 0;
3841
3842         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3843                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3844
3845                 elements += qeth_get_elements_for_range(
3846                         (addr_t)skb_frag_address(frag),
3847                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3848         }
3849         return elements;
3850 }
3851 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3852
3853 /**
3854  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3855  * @card:                       qeth card structure, to check max. elems.
3856  * @skb:                        SKB address
3857  * @extra_elems:                extra elems needed, to check against max.
3858  * @data_offset:                range starts at skb->data + data_offset
3859  *
3860  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3861  * skb data, including linear part and fragments. Checks if the result plus
3862  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3863  * Note: extra_elems is not included in the returned result.
3864  */
3865 int qeth_get_elements_no(struct qeth_card *card,
3866                      struct sk_buff *skb, int extra_elems, int data_offset)
3867 {
3868         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3869         int elements = qeth_get_elements_for_frags(skb);
3870         addr_t start = (addr_t)skb->data + data_offset;
3871
3872         if (start != end)
3873                 elements += qeth_get_elements_for_range(start, end);
3874
3875         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3876                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3877                         "(Number=%d / Length=%d). Discarded.\n",
3878                         elements + extra_elems, skb->len);
3879                 return 0;
3880         }
3881         return elements;
3882 }
3883 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3884
3885 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3886 {
3887         int hroom, inpage, rest;
3888
3889         if (((unsigned long)skb->data & PAGE_MASK) !=
3890             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3891                 hroom = skb_headroom(skb);
3892                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3893                 rest = len - inpage;
3894                 if (rest > hroom)
3895                         return 1;
3896                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3897                 skb->data -= rest;
3898                 skb->tail -= rest;
3899                 *hdr = (struct qeth_hdr *)skb->data;
3900                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3901         }
3902         return 0;
3903 }
3904 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3905
3906 /**
3907  * qeth_push_hdr() - push a qeth_hdr onto an skb.
3908  * @skb: skb that the qeth_hdr should be pushed onto.
3909  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3910  *       it contains a valid pointer to a qeth_hdr.
3911  * @len: length of the hdr that needs to be pushed on.
3912  *
3913  * Returns the pushed length. If the header can't be pushed on
3914  * (eg. because it would cross a page boundary), it is allocated from
3915  * the cache instead and 0 is returned.
3916  * Error to create the hdr is indicated by returning with < 0.
3917  */
3918 int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
3919 {
3920         if (skb_headroom(skb) >= len &&
3921             qeth_get_elements_for_range((addr_t)skb->data - len,
3922                                         (addr_t)skb->data) == 1) {
3923                 *hdr = skb_push(skb, len);
3924                 return len;
3925         }
3926         /* fall back */
3927         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3928         if (!*hdr)
3929                 return -ENOMEM;
3930         return 0;
3931 }
3932 EXPORT_SYMBOL_GPL(qeth_push_hdr);
3933
3934 static void __qeth_fill_buffer(struct sk_buff *skb,
3935                                struct qeth_qdio_out_buffer *buf,
3936                                bool is_first_elem, unsigned int offset)
3937 {
3938         struct qdio_buffer *buffer = buf->buffer;
3939         int element = buf->next_element_to_fill;
3940         int length = skb_headlen(skb) - offset;
3941         char *data = skb->data + offset;
3942         int length_here, cnt;
3943
3944         /* map linear part into buffer element(s) */
3945         while (length > 0) {
3946                 /* length_here is the remaining amount of data in this page */
3947                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3948                 if (length < length_here)
3949                         length_here = length;
3950
3951                 buffer->element[element].addr = data;
3952                 buffer->element[element].length = length_here;
3953                 length -= length_here;
3954                 if (is_first_elem) {
3955                         is_first_elem = false;
3956                         if (length || skb_is_nonlinear(skb))
3957                                 /* skb needs additional elements */
3958                                 buffer->element[element].eflags =
3959                                         SBAL_EFLAGS_FIRST_FRAG;
3960                         else
3961                                 buffer->element[element].eflags = 0;
3962                 } else {
3963                         buffer->element[element].eflags =
3964                                 SBAL_EFLAGS_MIDDLE_FRAG;
3965                 }
3966                 data += length_here;
3967                 element++;
3968         }
3969
3970         /* map page frags into buffer element(s) */
3971         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3972                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3973
3974                 data = skb_frag_address(frag);
3975                 length = skb_frag_size(frag);
3976                 while (length > 0) {
3977                         length_here = PAGE_SIZE -
3978                                 ((unsigned long) data % PAGE_SIZE);
3979                         if (length < length_here)
3980                                 length_here = length;
3981
3982                         buffer->element[element].addr = data;
3983                         buffer->element[element].length = length_here;
3984                         buffer->element[element].eflags =
3985                                 SBAL_EFLAGS_MIDDLE_FRAG;
3986                         length -= length_here;
3987                         data += length_here;
3988                         element++;
3989                 }
3990         }
3991
3992         if (buffer->element[element - 1].eflags)
3993                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3994         buf->next_element_to_fill = element;
3995 }
3996
3997 /**
3998  * qeth_fill_buffer() - map skb into an output buffer
3999  * @queue:      QDIO queue to submit the buffer on
4000  * @buf:        buffer to transport the skb
4001  * @skb:        skb to map into the buffer
4002  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4003  *              from qeth_core_header_cache.
4004  * @offset:     when mapping the skb, start at skb->data + offset
4005  * @hd_len:     if > 0, build a dedicated header element of this size
4006  */
4007 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4008                             struct qeth_qdio_out_buffer *buf,
4009                             struct sk_buff *skb, struct qeth_hdr *hdr,
4010                             unsigned int offset, unsigned int hd_len)
4011 {
4012         struct qdio_buffer *buffer = buf->buffer;
4013         bool is_first_elem = true;
4014         int flush_cnt = 0;
4015
4016         refcount_inc(&skb->users);
4017         skb_queue_tail(&buf->skb_list, skb);
4018
4019         /* build dedicated header element */
4020         if (hd_len) {
4021                 int element = buf->next_element_to_fill;
4022                 is_first_elem = false;
4023
4024                 buffer->element[element].addr = hdr;
4025                 buffer->element[element].length = hd_len;
4026                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4027                 /* remember to free cache-allocated qeth_hdr: */
4028                 buf->is_header[element] = ((void *)hdr != skb->data);
4029                 buf->next_element_to_fill++;
4030         }
4031
4032         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4033
4034         if (!queue->do_pack) {
4035                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4036                 /* set state to PRIMED -> will be flushed */
4037                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4038                 flush_cnt = 1;
4039         } else {
4040                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4041                 if (queue->card->options.performance_stats)
4042                         queue->card->perf_stats.skbs_sent_pack++;
4043                 if (buf->next_element_to_fill >=
4044                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4045                         /*
4046                          * packed buffer if full -> set state PRIMED
4047                          * -> will be flushed
4048                          */
4049                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4050                         flush_cnt = 1;
4051                 }
4052         }
4053         return flush_cnt;
4054 }
4055
4056 int qeth_do_send_packet_fast(struct qeth_card *card,
4057                              struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4058                              struct qeth_hdr *hdr, unsigned int offset,
4059                              unsigned int hd_len)
4060 {
4061         struct qeth_qdio_out_buffer *buffer;
4062         int index;
4063
4064         /* spin until we get the queue ... */
4065         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4066                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4067         /* ... now we've got the queue */
4068         index = queue->next_buf_to_fill;
4069         buffer = queue->bufs[queue->next_buf_to_fill];
4070         /*
4071          * check if buffer is empty to make sure that we do not 'overtake'
4072          * ourselves and try to fill a buffer that is already primed
4073          */
4074         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4075                 goto out;
4076         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
4077                                           QDIO_MAX_BUFFERS_PER_Q;
4078         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4079         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4080         qeth_flush_buffers(queue, index, 1);
4081         return 0;
4082 out:
4083         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4084         return -EBUSY;
4085 }
4086 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4087
4088 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4089                         struct sk_buff *skb, struct qeth_hdr *hdr,
4090                         unsigned int offset, unsigned int hd_len,
4091                         int elements_needed)
4092 {
4093         struct qeth_qdio_out_buffer *buffer;
4094         int start_index;
4095         int flush_count = 0;
4096         int do_pack = 0;
4097         int tmp;
4098         int rc = 0;
4099
4100         /* spin until we get the queue ... */
4101         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4102                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4103         start_index = queue->next_buf_to_fill;
4104         buffer = queue->bufs[queue->next_buf_to_fill];
4105         /*
4106          * check if buffer is empty to make sure that we do not 'overtake'
4107          * ourselves and try to fill a buffer that is already primed
4108          */
4109         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4110                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4111                 return -EBUSY;
4112         }
4113         /* check if we need to switch packing state of this queue */
4114         qeth_switch_to_packing_if_needed(queue);
4115         if (queue->do_pack) {
4116                 do_pack = 1;
4117                 /* does packet fit in current buffer? */
4118                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4119                     buffer->next_element_to_fill) < elements_needed) {
4120                         /* ... no -> set state PRIMED */
4121                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4122                         flush_count++;
4123                         queue->next_buf_to_fill =
4124                                 (queue->next_buf_to_fill + 1) %
4125                                 QDIO_MAX_BUFFERS_PER_Q;
4126                         buffer = queue->bufs[queue->next_buf_to_fill];
4127                         /* we did a step forward, so check buffer state
4128                          * again */
4129                         if (atomic_read(&buffer->state) !=
4130                             QETH_QDIO_BUF_EMPTY) {
4131                                 qeth_flush_buffers(queue, start_index,
4132                                                            flush_count);
4133                                 atomic_set(&queue->state,
4134                                                 QETH_OUT_Q_UNLOCKED);
4135                                 rc = -EBUSY;
4136                                 goto out;
4137                         }
4138                 }
4139         }
4140         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4141         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4142                                   QDIO_MAX_BUFFERS_PER_Q;
4143         flush_count += tmp;
4144         if (flush_count)
4145                 qeth_flush_buffers(queue, start_index, flush_count);
4146         else if (!atomic_read(&queue->set_pci_flags_count))
4147                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4148         /*
4149          * queue->state will go from LOCKED -> UNLOCKED or from
4150          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4151          * (switch packing state or flush buffer to get another pci flag out).
4152          * In that case we will enter this loop
4153          */
4154         while (atomic_dec_return(&queue->state)) {
4155                 start_index = queue->next_buf_to_fill;
4156                 /* check if we can go back to non-packing state */
4157                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4158                 /*
4159                  * check if we need to flush a packing buffer to get a pci
4160                  * flag out on the queue
4161                  */
4162                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4163                         tmp = qeth_prep_flush_pack_buffer(queue);
4164                 if (tmp) {
4165                         qeth_flush_buffers(queue, start_index, tmp);
4166                         flush_count += tmp;
4167                 }
4168         }
4169 out:
4170         /* at this point the queue is UNLOCKED again */
4171         if (queue->card->options.performance_stats && do_pack)
4172                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4173
4174         return rc;
4175 }
4176 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4177
4178 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4179                 struct qeth_reply *reply, unsigned long data)
4180 {
4181         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4182         struct qeth_ipacmd_setadpparms *setparms;
4183
4184         QETH_CARD_TEXT(card, 4, "prmadpcb");
4185
4186         setparms = &(cmd->data.setadapterparms);
4187         if (qeth_setadpparms_inspect_rc(cmd)) {
4188                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4189                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4190         }
4191         card->info.promisc_mode = setparms->data.mode;
4192         return 0;
4193 }
4194
4195 void qeth_setadp_promisc_mode(struct qeth_card *card)
4196 {
4197         enum qeth_ipa_promisc_modes mode;
4198         struct net_device *dev = card->dev;
4199         struct qeth_cmd_buffer *iob;
4200         struct qeth_ipa_cmd *cmd;
4201
4202         QETH_CARD_TEXT(card, 4, "setprom");
4203
4204         if (((dev->flags & IFF_PROMISC) &&
4205              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4206             (!(dev->flags & IFF_PROMISC) &&
4207              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4208                 return;
4209         mode = SET_PROMISC_MODE_OFF;
4210         if (dev->flags & IFF_PROMISC)
4211                 mode = SET_PROMISC_MODE_ON;
4212         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4213
4214         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4215                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4216         if (!iob)
4217                 return;
4218         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
4219         cmd->data.setadapterparms.data.mode = mode;
4220         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4221 }
4222 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4223
4224 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4225 {
4226         struct qeth_card *card;
4227         char dbf_text[15];
4228
4229         card = dev->ml_priv;
4230
4231         QETH_CARD_TEXT(card, 4, "chgmtu");
4232         sprintf(dbf_text, "%8x", new_mtu);
4233         QETH_CARD_TEXT(card, 4, dbf_text);
4234
4235         if (!qeth_mtu_is_valid(card, new_mtu))
4236                 return -EINVAL;
4237         dev->mtu = new_mtu;
4238         return 0;
4239 }
4240 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4241
4242 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4243 {
4244         struct qeth_card *card;
4245
4246         card = dev->ml_priv;
4247
4248         QETH_CARD_TEXT(card, 5, "getstat");
4249
4250         return &card->stats;
4251 }
4252 EXPORT_SYMBOL_GPL(qeth_get_stats);
4253
4254 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4255                 struct qeth_reply *reply, unsigned long data)
4256 {
4257         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4258
4259         QETH_CARD_TEXT(card, 4, "chgmaccb");
4260         if (qeth_setadpparms_inspect_rc(cmd))
4261                 return 0;
4262
4263         if (!card->options.layer2 ||
4264             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4265                 memcpy(card->dev->dev_addr,
4266                        &cmd->data.setadapterparms.data.change_addr.addr,
4267                        OSA_ADDR_LEN);
4268                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4269         }
4270         return 0;
4271 }
4272
4273 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4274 {
4275         int rc;
4276         struct qeth_cmd_buffer *iob;
4277         struct qeth_ipa_cmd *cmd;
4278
4279         QETH_CARD_TEXT(card, 4, "chgmac");
4280
4281         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4282                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4283                                    sizeof(struct qeth_change_addr));
4284         if (!iob)
4285                 return -ENOMEM;
4286         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4287         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4288         cmd->data.setadapterparms.data.change_addr.addr_size = OSA_ADDR_LEN;
4289         memcpy(&cmd->data.setadapterparms.data.change_addr.addr,
4290                card->dev->dev_addr, OSA_ADDR_LEN);
4291         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4292                                NULL);
4293         return rc;
4294 }
4295 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4296
4297 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4298                 struct qeth_reply *reply, unsigned long data)
4299 {
4300         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4301         struct qeth_set_access_ctrl *access_ctrl_req;
4302         int fallback = *(int *)reply->param;
4303
4304         QETH_CARD_TEXT(card, 4, "setaccb");
4305         if (cmd->hdr.return_code)
4306                 return 0;
4307         qeth_setadpparms_inspect_rc(cmd);
4308
4309         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4310         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4311         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4312         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4313                 cmd->data.setadapterparms.hdr.return_code);
4314         if (cmd->data.setadapterparms.hdr.return_code !=
4315                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4316                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4317                                 card->gdev->dev.kobj.name,
4318                                 access_ctrl_req->subcmd_code,
4319                                 cmd->data.setadapterparms.hdr.return_code);
4320         switch (cmd->data.setadapterparms.hdr.return_code) {
4321         case SET_ACCESS_CTRL_RC_SUCCESS:
4322                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4323                         dev_info(&card->gdev->dev,
4324                             "QDIO data connection isolation is deactivated\n");
4325                 } else {
4326                         dev_info(&card->gdev->dev,
4327                             "QDIO data connection isolation is activated\n");
4328                 }
4329                 break;
4330         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4331                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4332                                 "deactivated\n", dev_name(&card->gdev->dev));
4333                 if (fallback)
4334                         card->options.isolation = card->options.prev_isolation;
4335                 break;
4336         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4337                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4338                                 " activated\n", dev_name(&card->gdev->dev));
4339                 if (fallback)
4340                         card->options.isolation = card->options.prev_isolation;
4341                 break;
4342         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4343                 dev_err(&card->gdev->dev, "Adapter does not "
4344                         "support QDIO data connection isolation\n");
4345                 break;
4346         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4347                 dev_err(&card->gdev->dev,
4348                         "Adapter is dedicated. "
4349                         "QDIO data connection isolation not supported\n");
4350                 if (fallback)
4351                         card->options.isolation = card->options.prev_isolation;
4352                 break;
4353         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4354                 dev_err(&card->gdev->dev,
4355                         "TSO does not permit QDIO data connection isolation\n");
4356                 if (fallback)
4357                         card->options.isolation = card->options.prev_isolation;
4358                 break;
4359         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4360                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4361                         "support reflective relay mode\n");
4362                 if (fallback)
4363                         card->options.isolation = card->options.prev_isolation;
4364                 break;
4365         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4366                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4367                                         "enabled at the adjacent switch port");
4368                 if (fallback)
4369                         card->options.isolation = card->options.prev_isolation;
4370                 break;
4371         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4372                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4373                                         "at the adjacent switch failed\n");
4374                 break;
4375         default:
4376                 /* this should never happen */
4377                 if (fallback)
4378                         card->options.isolation = card->options.prev_isolation;
4379                 break;
4380         }
4381         return 0;
4382 }
4383
4384 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4385                 enum qeth_ipa_isolation_modes isolation, int fallback)
4386 {
4387         int rc;
4388         struct qeth_cmd_buffer *iob;
4389         struct qeth_ipa_cmd *cmd;
4390         struct qeth_set_access_ctrl *access_ctrl_req;
4391
4392         QETH_CARD_TEXT(card, 4, "setacctl");
4393
4394         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4395         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4396
4397         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4398                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4399                                    sizeof(struct qeth_set_access_ctrl));
4400         if (!iob)
4401                 return -ENOMEM;
4402         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4403         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4404         access_ctrl_req->subcmd_code = isolation;
4405
4406         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4407                                &fallback);
4408         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4409         return rc;
4410 }
4411
4412 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4413 {
4414         int rc = 0;
4415
4416         QETH_CARD_TEXT(card, 4, "setactlo");
4417
4418         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4419              card->info.type == QETH_CARD_TYPE_OSX) &&
4420              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4421                 rc = qeth_setadpparms_set_access_ctrl(card,
4422                         card->options.isolation, fallback);
4423                 if (rc) {
4424                         QETH_DBF_MESSAGE(3,
4425                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4426                                 card->gdev->dev.kobj.name,
4427                                 rc);
4428                         rc = -EOPNOTSUPP;
4429                 }
4430         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4431                 card->options.isolation = ISOLATION_MODE_NONE;
4432
4433                 dev_err(&card->gdev->dev, "Adapter does not "
4434                         "support QDIO data connection isolation\n");
4435                 rc = -EOPNOTSUPP;
4436         }
4437         return rc;
4438 }
4439 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4440
4441 void qeth_tx_timeout(struct net_device *dev)
4442 {
4443         struct qeth_card *card;
4444
4445         card = dev->ml_priv;
4446         QETH_CARD_TEXT(card, 4, "txtimeo");
4447         card->stats.tx_errors++;
4448         qeth_schedule_recovery(card);
4449 }
4450 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4451
4452 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4453 {
4454         struct qeth_card *card = dev->ml_priv;
4455         int rc = 0;
4456
4457         switch (regnum) {
4458         case MII_BMCR: /* Basic mode control register */
4459                 rc = BMCR_FULLDPLX;
4460                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4461                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4462                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4463                         rc |= BMCR_SPEED100;
4464                 break;
4465         case MII_BMSR: /* Basic mode status register */
4466                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4467                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4468                      BMSR_100BASE4;
4469                 break;
4470         case MII_PHYSID1: /* PHYS ID 1 */
4471                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4472                      dev->dev_addr[2];
4473                 rc = (rc >> 5) & 0xFFFF;
4474                 break;
4475         case MII_PHYSID2: /* PHYS ID 2 */
4476                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4477                 break;
4478         case MII_ADVERTISE: /* Advertisement control reg */
4479                 rc = ADVERTISE_ALL;
4480                 break;
4481         case MII_LPA: /* Link partner ability reg */
4482                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4483                      LPA_100BASE4 | LPA_LPACK;
4484                 break;
4485         case MII_EXPANSION: /* Expansion register */
4486                 break;
4487         case MII_DCOUNTER: /* disconnect counter */
4488                 break;
4489         case MII_FCSCOUNTER: /* false carrier counter */
4490                 break;
4491         case MII_NWAYTEST: /* N-way auto-neg test register */
4492                 break;
4493         case MII_RERRCOUNTER: /* rx error counter */
4494                 rc = card->stats.rx_errors;
4495                 break;
4496         case MII_SREVISION: /* silicon revision */
4497                 break;
4498         case MII_RESV1: /* reserved 1 */
4499                 break;
4500         case MII_LBRERROR: /* loopback, rx, bypass error */
4501                 break;
4502         case MII_PHYADDR: /* physical address */
4503                 break;
4504         case MII_RESV2: /* reserved 2 */
4505                 break;
4506         case MII_TPISTATUS: /* TPI status for 10mbps */
4507                 break;
4508         case MII_NCONFIG: /* network interface config */
4509                 break;
4510         default:
4511                 break;
4512         }
4513         return rc;
4514 }
4515
4516 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4517                 struct qeth_cmd_buffer *iob, int len,
4518                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4519                         unsigned long),
4520                 void *reply_param)
4521 {
4522         u16 s1, s2;
4523
4524         QETH_CARD_TEXT(card, 4, "sendsnmp");
4525
4526         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4527         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4528                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4529         /* adjust PDU length fields in IPA_PDU_HEADER */
4530         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4531         s2 = (u32) len;
4532         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4533         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4534         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4535         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4536         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4537                                       reply_cb, reply_param);
4538 }
4539
4540 static int qeth_snmp_command_cb(struct qeth_card *card,
4541                 struct qeth_reply *reply, unsigned long sdata)
4542 {
4543         struct qeth_ipa_cmd *cmd;
4544         struct qeth_arp_query_info *qinfo;
4545         unsigned char *data;
4546         void *snmp_data;
4547         __u16 data_len;
4548
4549         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4550
4551         cmd = (struct qeth_ipa_cmd *) sdata;
4552         data = (unsigned char *)((char *)cmd - reply->offset);
4553         qinfo = (struct qeth_arp_query_info *) reply->param;
4554
4555         if (cmd->hdr.return_code) {
4556                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4557                 return 0;
4558         }
4559         if (cmd->data.setadapterparms.hdr.return_code) {
4560                 cmd->hdr.return_code =
4561                         cmd->data.setadapterparms.hdr.return_code;
4562                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4563                 return 0;
4564         }
4565         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4566         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4567                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4568                 data_len -= offsetof(struct qeth_ipa_cmd,
4569                                      data.setadapterparms.data.snmp);
4570         } else {
4571                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4572                 data_len -= offsetof(struct qeth_ipa_cmd,
4573                                      data.setadapterparms.data.snmp.request);
4574         }
4575
4576         /* check if there is enough room in userspace */
4577         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4578                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4579                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4580                 return 0;
4581         }
4582         QETH_CARD_TEXT_(card, 4, "snore%i",
4583                        cmd->data.setadapterparms.hdr.used_total);
4584         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4585                 cmd->data.setadapterparms.hdr.seq_no);
4586         /*copy entries to user buffer*/
4587         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4588         qinfo->udata_offset += data_len;
4589
4590         /* check if all replies received ... */
4591                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4592                                cmd->data.setadapterparms.hdr.used_total);
4593                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4594                                cmd->data.setadapterparms.hdr.seq_no);
4595         if (cmd->data.setadapterparms.hdr.seq_no <
4596             cmd->data.setadapterparms.hdr.used_total)
4597                 return 1;
4598         return 0;
4599 }
4600
4601 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4602 {
4603         struct qeth_cmd_buffer *iob;
4604         struct qeth_ipa_cmd *cmd;
4605         struct qeth_snmp_ureq *ureq;
4606         unsigned int req_len;
4607         struct qeth_arp_query_info qinfo = {0, };
4608         int rc = 0;
4609
4610         QETH_CARD_TEXT(card, 3, "snmpcmd");
4611
4612         if (card->info.guestlan)
4613                 return -EOPNOTSUPP;
4614
4615         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4616             (!card->options.layer2)) {
4617                 return -EOPNOTSUPP;
4618         }
4619         /* skip 4 bytes (data_len struct member) to get req_len */
4620         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4621                 return -EFAULT;
4622         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4623                        sizeof(struct qeth_ipacmd_hdr) -
4624                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4625                 return -EINVAL;
4626         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4627         if (IS_ERR(ureq)) {
4628                 QETH_CARD_TEXT(card, 2, "snmpnome");
4629                 return PTR_ERR(ureq);
4630         }
4631         qinfo.udata_len = ureq->hdr.data_len;
4632         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4633         if (!qinfo.udata) {
4634                 kfree(ureq);
4635                 return -ENOMEM;
4636         }
4637         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4638
4639         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4640                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4641         if (!iob) {
4642                 rc = -ENOMEM;
4643                 goto out;
4644         }
4645         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4646         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4647         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4648                                     qeth_snmp_command_cb, (void *)&qinfo);
4649         if (rc)
4650                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4651                            QETH_CARD_IFNAME(card), rc);
4652         else {
4653                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4654                         rc = -EFAULT;
4655         }
4656 out:
4657         kfree(ureq);
4658         kfree(qinfo.udata);
4659         return rc;
4660 }
4661
4662 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4663                 struct qeth_reply *reply, unsigned long data)
4664 {
4665         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4666         struct qeth_qoat_priv *priv;
4667         char *resdata;
4668         int resdatalen;
4669
4670         QETH_CARD_TEXT(card, 3, "qoatcb");
4671         if (qeth_setadpparms_inspect_rc(cmd))
4672                 return 0;
4673
4674         priv = (struct qeth_qoat_priv *)reply->param;
4675         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4676         resdata = (char *)data + 28;
4677
4678         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4679                 cmd->hdr.return_code = IPA_RC_FFFF;
4680                 return 0;
4681         }
4682
4683         memcpy((priv->buffer + priv->response_len), resdata,
4684                 resdatalen);
4685         priv->response_len += resdatalen;
4686
4687         if (cmd->data.setadapterparms.hdr.seq_no <
4688             cmd->data.setadapterparms.hdr.used_total)
4689                 return 1;
4690         return 0;
4691 }
4692
4693 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4694 {
4695         int rc = 0;
4696         struct qeth_cmd_buffer *iob;
4697         struct qeth_ipa_cmd *cmd;
4698         struct qeth_query_oat *oat_req;
4699         struct qeth_query_oat_data oat_data;
4700         struct qeth_qoat_priv priv;
4701         void __user *tmp;
4702
4703         QETH_CARD_TEXT(card, 3, "qoatcmd");
4704
4705         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4706                 rc = -EOPNOTSUPP;
4707                 goto out;
4708         }
4709
4710         if (copy_from_user(&oat_data, udata,
4711             sizeof(struct qeth_query_oat_data))) {
4712                         rc = -EFAULT;
4713                         goto out;
4714         }
4715
4716         priv.buffer_len = oat_data.buffer_len;
4717         priv.response_len = 0;
4718         priv.buffer = vzalloc(oat_data.buffer_len);
4719         if (!priv.buffer) {
4720                 rc = -ENOMEM;
4721                 goto out;
4722         }
4723
4724         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4725                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4726                                    sizeof(struct qeth_query_oat));
4727         if (!iob) {
4728                 rc = -ENOMEM;
4729                 goto out_free;
4730         }
4731         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
4732         oat_req = &cmd->data.setadapterparms.data.query_oat;
4733         oat_req->subcmd_code = oat_data.command;
4734
4735         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4736                                &priv);
4737         if (!rc) {
4738                 if (is_compat_task())
4739                         tmp = compat_ptr(oat_data.ptr);
4740                 else
4741                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4742
4743                 if (copy_to_user(tmp, priv.buffer,
4744                     priv.response_len)) {
4745                         rc = -EFAULT;
4746                         goto out_free;
4747                 }
4748
4749                 oat_data.response_len = priv.response_len;
4750
4751                 if (copy_to_user(udata, &oat_data,
4752                     sizeof(struct qeth_query_oat_data)))
4753                         rc = -EFAULT;
4754         } else
4755                 if (rc == IPA_RC_FFFF)
4756                         rc = -EFAULT;
4757
4758 out_free:
4759         vfree(priv.buffer);
4760 out:
4761         return rc;
4762 }
4763
4764 static int qeth_query_card_info_cb(struct qeth_card *card,
4765                                    struct qeth_reply *reply, unsigned long data)
4766 {
4767         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4768         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4769         struct qeth_query_card_info *card_info;
4770
4771         QETH_CARD_TEXT(card, 2, "qcrdincb");
4772         if (qeth_setadpparms_inspect_rc(cmd))
4773                 return 0;
4774
4775         card_info = &cmd->data.setadapterparms.data.card_info;
4776         carrier_info->card_type = card_info->card_type;
4777         carrier_info->port_mode = card_info->port_mode;
4778         carrier_info->port_speed = card_info->port_speed;
4779         return 0;
4780 }
4781
4782 static int qeth_query_card_info(struct qeth_card *card,
4783                                 struct carrier_info *carrier_info)
4784 {
4785         struct qeth_cmd_buffer *iob;
4786
4787         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4788         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4789                 return -EOPNOTSUPP;
4790         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4791                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4792         if (!iob)
4793                 return -ENOMEM;
4794         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4795                                         (void *)carrier_info);
4796 }
4797
4798 /**
4799  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4800  * @card: pointer to a qeth_card
4801  *
4802  * Returns
4803  *      0, if a MAC address has been set for the card's netdevice
4804  *      a return code, for various error conditions
4805  */
4806 int qeth_vm_request_mac(struct qeth_card *card)
4807 {
4808         struct diag26c_mac_resp *response;
4809         struct diag26c_mac_req *request;
4810         struct ccw_dev_id id;
4811         int rc;
4812
4813         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4814
4815         if (!card->dev)
4816                 return -ENODEV;
4817
4818         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4819         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4820         if (!request || !response) {
4821                 rc = -ENOMEM;
4822                 goto out;
4823         }
4824
4825         ccw_device_get_id(CARD_DDEV(card), &id);
4826         request->resp_buf_len = sizeof(*response);
4827         request->resp_version = DIAG26C_VERSION2;
4828         request->op_code = DIAG26C_GET_MAC;
4829         request->devno = id.devno;
4830
4831         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4832         if (rc)
4833                 goto out;
4834
4835         if (request->resp_buf_len < sizeof(*response) ||
4836             response->version != request->resp_version) {
4837                 rc = -EIO;
4838                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4839                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4840                              sizeof(request->resp_buf_len));
4841         } else if (!is_valid_ether_addr(response->mac)) {
4842                 rc = -EINVAL;
4843                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4844                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4845         } else {
4846                 ether_addr_copy(card->dev->dev_addr, response->mac);
4847         }
4848
4849 out:
4850         kfree(response);
4851         kfree(request);
4852         return rc;
4853 }
4854 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4855
4856 static int qeth_get_qdio_q_format(struct qeth_card *card)
4857 {
4858         if (card->info.type == QETH_CARD_TYPE_IQD)
4859                 return QDIO_IQDIO_QFMT;
4860         else
4861                 return QDIO_QETH_QFMT;
4862 }
4863
4864 static void qeth_determine_capabilities(struct qeth_card *card)
4865 {
4866         int rc;
4867         int length;
4868         char *prcd;
4869         struct ccw_device *ddev;
4870         int ddev_offline = 0;
4871
4872         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4873         ddev = CARD_DDEV(card);
4874         if (!ddev->online) {
4875                 ddev_offline = 1;
4876                 rc = ccw_device_set_online(ddev);
4877                 if (rc) {
4878                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4879                         goto out;
4880                 }
4881         }
4882
4883         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4884         if (rc) {
4885                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4886                         dev_name(&card->gdev->dev), rc);
4887                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4888                 goto out_offline;
4889         }
4890         qeth_configure_unitaddr(card, prcd);
4891         if (ddev_offline)
4892                 qeth_configure_blkt_default(card, prcd);
4893         kfree(prcd);
4894
4895         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4896         if (rc)
4897                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4898
4899         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4900         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4901         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4902         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4903         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4904         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4905             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4906             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4907                 dev_info(&card->gdev->dev,
4908                         "Completion Queueing supported\n");
4909         } else {
4910                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4911         }
4912
4913
4914 out_offline:
4915         if (ddev_offline == 1)
4916                 ccw_device_set_offline(ddev);
4917 out:
4918         return;
4919 }
4920
4921 static void qeth_qdio_establish_cq(struct qeth_card *card,
4922                                    struct qdio_buffer **in_sbal_ptrs,
4923                                    void (**queue_start_poll)
4924                                         (struct ccw_device *, int,
4925                                          unsigned long))
4926 {
4927         int i;
4928
4929         if (card->options.cq == QETH_CQ_ENABLED) {
4930                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4931                              (card->qdio.no_in_queues - 1);
4932                 i = QDIO_MAX_BUFFERS_PER_Q * (card->qdio.no_in_queues - 1);
4933                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4934                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4935                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4936                 }
4937
4938                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4939         }
4940 }
4941
4942 static int qeth_qdio_establish(struct qeth_card *card)
4943 {
4944         struct qdio_initialize init_data;
4945         char *qib_param_field;
4946         struct qdio_buffer **in_sbal_ptrs;
4947         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4948         struct qdio_buffer **out_sbal_ptrs;
4949         int i, j, k;
4950         int rc = 0;
4951
4952         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4953
4954         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q * sizeof(char),
4955                               GFP_KERNEL);
4956         if (!qib_param_field) {
4957                 rc =  -ENOMEM;
4958                 goto out_free_nothing;
4959         }
4960
4961         qeth_create_qib_param_field(card, qib_param_field);
4962         qeth_create_qib_param_field_blkt(card, qib_param_field);
4963
4964         in_sbal_ptrs = kzalloc(card->qdio.no_in_queues *
4965                                QDIO_MAX_BUFFERS_PER_Q * sizeof(void *),
4966                                GFP_KERNEL);
4967         if (!in_sbal_ptrs) {
4968                 rc = -ENOMEM;
4969                 goto out_free_qib_param;
4970         }
4971         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4972                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4973                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4974         }
4975
4976         queue_start_poll = kzalloc(sizeof(void *) * card->qdio.no_in_queues,
4977                                    GFP_KERNEL);
4978         if (!queue_start_poll) {
4979                 rc = -ENOMEM;
4980                 goto out_free_in_sbals;
4981         }
4982         for (i = 0; i < card->qdio.no_in_queues; ++i)
4983                 queue_start_poll[i] = card->discipline->start_poll;
4984
4985         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4986
4987         out_sbal_ptrs =
4988                 kzalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q *
4989                         sizeof(void *), GFP_KERNEL);
4990         if (!out_sbal_ptrs) {
4991                 rc = -ENOMEM;
4992                 goto out_free_queue_start_poll;
4993         }
4994         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4995                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4996                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4997                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4998                 }
4999
5000         memset(&init_data, 0, sizeof(struct qdio_initialize));
5001         init_data.cdev                   = CARD_DDEV(card);
5002         init_data.q_format               = qeth_get_qdio_q_format(card);
5003         init_data.qib_param_field_format = 0;
5004         init_data.qib_param_field        = qib_param_field;
5005         init_data.no_input_qs            = card->qdio.no_in_queues;
5006         init_data.no_output_qs           = card->qdio.no_out_queues;
5007         init_data.input_handler          = card->discipline->input_handler;
5008         init_data.output_handler         = card->discipline->output_handler;
5009         init_data.queue_start_poll_array = queue_start_poll;
5010         init_data.int_parm               = (unsigned long) card;
5011         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
5012         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
5013         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5014         init_data.scan_threshold =
5015                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5016
5017         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5018                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5019                 rc = qdio_allocate(&init_data);
5020                 if (rc) {
5021                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5022                         goto out;
5023                 }
5024                 rc = qdio_establish(&init_data);
5025                 if (rc) {
5026                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5027                         qdio_free(CARD_DDEV(card));
5028                 }
5029         }
5030
5031         switch (card->options.cq) {
5032         case QETH_CQ_ENABLED:
5033                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5034                 break;
5035         case QETH_CQ_DISABLED:
5036                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5037                 break;
5038         default:
5039                 break;
5040         }
5041 out:
5042         kfree(out_sbal_ptrs);
5043 out_free_queue_start_poll:
5044         kfree(queue_start_poll);
5045 out_free_in_sbals:
5046         kfree(in_sbal_ptrs);
5047 out_free_qib_param:
5048         kfree(qib_param_field);
5049 out_free_nothing:
5050         return rc;
5051 }
5052
5053 static void qeth_core_free_card(struct qeth_card *card)
5054 {
5055
5056         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5057         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5058         qeth_clean_channel(&card->read);
5059         qeth_clean_channel(&card->write);
5060         qeth_free_qdio_buffers(card);
5061         unregister_service_level(&card->qeth_service_level);
5062         kfree(card);
5063 }
5064
5065 void qeth_trace_features(struct qeth_card *card)
5066 {
5067         QETH_CARD_TEXT(card, 2, "features");
5068         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5069         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5070         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5071         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5072                       sizeof(card->info.diagass_support));
5073 }
5074 EXPORT_SYMBOL_GPL(qeth_trace_features);
5075
5076 static struct ccw_device_id qeth_ids[] = {
5077         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5078                                         .driver_info = QETH_CARD_TYPE_OSD},
5079         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5080                                         .driver_info = QETH_CARD_TYPE_IQD},
5081         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5082                                         .driver_info = QETH_CARD_TYPE_OSN},
5083         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5084                                         .driver_info = QETH_CARD_TYPE_OSM},
5085         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5086                                         .driver_info = QETH_CARD_TYPE_OSX},
5087         {},
5088 };
5089 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5090
5091 static struct ccw_driver qeth_ccw_driver = {
5092         .driver = {
5093                 .owner = THIS_MODULE,
5094                 .name = "qeth",
5095         },
5096         .ids = qeth_ids,
5097         .probe = ccwgroup_probe_ccwdev,
5098         .remove = ccwgroup_remove_ccwdev,
5099 };
5100
5101 int qeth_core_hardsetup_card(struct qeth_card *card)
5102 {
5103         int retries = 3;
5104         int rc;
5105
5106         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5107         atomic_set(&card->force_alloc_skb, 0);
5108         qeth_update_from_chp_desc(card);
5109 retry:
5110         if (retries < 3)
5111                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5112                         dev_name(&card->gdev->dev));
5113         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5114         ccw_device_set_offline(CARD_DDEV(card));
5115         ccw_device_set_offline(CARD_WDEV(card));
5116         ccw_device_set_offline(CARD_RDEV(card));
5117         qdio_free(CARD_DDEV(card));
5118         rc = ccw_device_set_online(CARD_RDEV(card));
5119         if (rc)
5120                 goto retriable;
5121         rc = ccw_device_set_online(CARD_WDEV(card));
5122         if (rc)
5123                 goto retriable;
5124         rc = ccw_device_set_online(CARD_DDEV(card));
5125         if (rc)
5126                 goto retriable;
5127 retriable:
5128         if (rc == -ERESTARTSYS) {
5129                 QETH_DBF_TEXT(SETUP, 2, "break1");
5130                 return rc;
5131         } else if (rc) {
5132                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5133                 if (--retries < 0)
5134                         goto out;
5135                 else
5136                         goto retry;
5137         }
5138         qeth_determine_capabilities(card);
5139         qeth_init_tokens(card);
5140         qeth_init_func_level(card);
5141         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5142         if (rc == -ERESTARTSYS) {
5143                 QETH_DBF_TEXT(SETUP, 2, "break2");
5144                 return rc;
5145         } else if (rc) {
5146                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5147                 if (--retries < 0)
5148                         goto out;
5149                 else
5150                         goto retry;
5151         }
5152         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5153         if (rc == -ERESTARTSYS) {
5154                 QETH_DBF_TEXT(SETUP, 2, "break3");
5155                 return rc;
5156         } else if (rc) {
5157                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5158                 if (--retries < 0)
5159                         goto out;
5160                 else
5161                         goto retry;
5162         }
5163         card->read_or_write_problem = 0;
5164         rc = qeth_mpc_initialize(card);
5165         if (rc) {
5166                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5167                 goto out;
5168         }
5169
5170         rc = qeth_send_startlan(card);
5171         if (rc) {
5172                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5173                 if (rc == IPA_RC_LAN_OFFLINE) {
5174                         dev_warn(&card->gdev->dev,
5175                                 "The LAN is offline\n");
5176                         card->lan_online = 0;
5177                 } else {
5178                         rc = -ENODEV;
5179                         goto out;
5180                 }
5181         } else
5182                 card->lan_online = 1;
5183
5184         card->options.ipa4.supported_funcs = 0;
5185         card->options.ipa6.supported_funcs = 0;
5186         card->options.adp.supported_funcs = 0;
5187         card->options.sbp.supported_funcs = 0;
5188         card->info.diagass_support = 0;
5189         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5190         if (rc == -ENOMEM)
5191                 goto out;
5192         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5193                 rc = qeth_query_setadapterparms(card);
5194                 if (rc < 0) {
5195                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5196                         goto out;
5197                 }
5198         }
5199         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5200                 rc = qeth_query_setdiagass(card);
5201                 if (rc < 0) {
5202                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5203                         goto out;
5204                 }
5205         }
5206         return 0;
5207 out:
5208         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5209                 "an error on the device\n");
5210         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5211                 dev_name(&card->gdev->dev), rc);
5212         return rc;
5213 }
5214 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5215
5216 static int qeth_create_skb_frag(struct qeth_qdio_buffer *qethbuffer,
5217                                 struct qdio_buffer_element *element,
5218                                 struct sk_buff **pskb, int offset, int *pfrag,
5219                                 int data_len)
5220 {
5221         struct page *page = virt_to_page(element->addr);
5222         if (*pskb == NULL) {
5223                 if (qethbuffer->rx_skb) {
5224                         /* only if qeth_card.options.cq == QETH_CQ_ENABLED */
5225                         *pskb = qethbuffer->rx_skb;
5226                         qethbuffer->rx_skb = NULL;
5227                 } else {
5228                         *pskb = dev_alloc_skb(QETH_RX_PULL_LEN + ETH_HLEN);
5229                         if (!(*pskb))
5230                                 return -ENOMEM;
5231                 }
5232
5233                 skb_reserve(*pskb, ETH_HLEN);
5234                 if (data_len <= QETH_RX_PULL_LEN) {
5235                         skb_put_data(*pskb, element->addr + offset, data_len);
5236                 } else {
5237                         get_page(page);
5238                         skb_put_data(*pskb, element->addr + offset,
5239                                      QETH_RX_PULL_LEN);
5240                         skb_fill_page_desc(*pskb, *pfrag, page,
5241                                 offset + QETH_RX_PULL_LEN,
5242                                 data_len - QETH_RX_PULL_LEN);
5243                         (*pskb)->data_len += data_len - QETH_RX_PULL_LEN;
5244                         (*pskb)->len      += data_len - QETH_RX_PULL_LEN;
5245                         (*pskb)->truesize += data_len - QETH_RX_PULL_LEN;
5246                         (*pfrag)++;
5247                 }
5248         } else {
5249                 get_page(page);
5250                 skb_fill_page_desc(*pskb, *pfrag, page, offset, data_len);
5251                 (*pskb)->data_len += data_len;
5252                 (*pskb)->len      += data_len;
5253                 (*pskb)->truesize += data_len;
5254                 (*pfrag)++;
5255         }
5256
5257
5258         return 0;
5259 }
5260
5261 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5262 {
5263         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5264 }
5265
5266 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5267                 struct qeth_qdio_buffer *qethbuffer,
5268                 struct qdio_buffer_element **__element, int *__offset,
5269                 struct qeth_hdr **hdr)
5270 {
5271         struct qdio_buffer_element *element = *__element;
5272         struct qdio_buffer *buffer = qethbuffer->buffer;
5273         int offset = *__offset;
5274         struct sk_buff *skb = NULL;
5275         int skb_len = 0;
5276         void *data_ptr;
5277         int data_len;
5278         int headroom = 0;
5279         int use_rx_sg = 0;
5280         int frag = 0;
5281
5282         /* qeth_hdr must not cross element boundaries */
5283         if (element->length < offset + sizeof(struct qeth_hdr)) {
5284                 if (qeth_is_last_sbale(element))
5285                         return NULL;
5286                 element++;
5287                 offset = 0;
5288                 if (element->length < sizeof(struct qeth_hdr))
5289                         return NULL;
5290         }
5291         *hdr = element->addr + offset;
5292
5293         offset += sizeof(struct qeth_hdr);
5294         switch ((*hdr)->hdr.l2.id) {
5295         case QETH_HEADER_TYPE_LAYER2:
5296                 skb_len = (*hdr)->hdr.l2.pkt_length;
5297                 break;
5298         case QETH_HEADER_TYPE_LAYER3:
5299                 skb_len = (*hdr)->hdr.l3.length;
5300                 headroom = ETH_HLEN;
5301                 break;
5302         case QETH_HEADER_TYPE_OSN:
5303                 skb_len = (*hdr)->hdr.osn.pdu_length;
5304                 headroom = sizeof(struct qeth_hdr);
5305                 break;
5306         default:
5307                 break;
5308         }
5309
5310         if (!skb_len)
5311                 return NULL;
5312
5313         if (((skb_len >= card->options.rx_sg_cb) &&
5314              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5315              (!atomic_read(&card->force_alloc_skb))) ||
5316             (card->options.cq == QETH_CQ_ENABLED)) {
5317                 use_rx_sg = 1;
5318         } else {
5319                 skb = dev_alloc_skb(skb_len + headroom);
5320                 if (!skb)
5321                         goto no_mem;
5322                 if (headroom)
5323                         skb_reserve(skb, headroom);
5324         }
5325
5326         data_ptr = element->addr + offset;
5327         while (skb_len) {
5328                 data_len = min(skb_len, (int)(element->length - offset));
5329                 if (data_len) {
5330                         if (use_rx_sg) {
5331                                 if (qeth_create_skb_frag(qethbuffer, element,
5332                                     &skb, offset, &frag, data_len))
5333                                         goto no_mem;
5334                         } else {
5335                                 skb_put_data(skb, data_ptr, data_len);
5336                         }
5337                 }
5338                 skb_len -= data_len;
5339                 if (skb_len) {
5340                         if (qeth_is_last_sbale(element)) {
5341                                 QETH_CARD_TEXT(card, 4, "unexeob");
5342                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5343                                 dev_kfree_skb_any(skb);
5344                                 card->stats.rx_errors++;
5345                                 return NULL;
5346                         }
5347                         element++;
5348                         offset = 0;
5349                         data_ptr = element->addr;
5350                 } else {
5351                         offset += data_len;
5352                 }
5353         }
5354         *__element = element;
5355         *__offset = offset;
5356         if (use_rx_sg && card->options.performance_stats) {
5357                 card->perf_stats.sg_skbs_rx++;
5358                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5359         }
5360         return skb;
5361 no_mem:
5362         if (net_ratelimit()) {
5363                 QETH_CARD_TEXT(card, 2, "noskbmem");
5364         }
5365         card->stats.rx_dropped++;
5366         return NULL;
5367 }
5368 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5369
5370 int qeth_poll(struct napi_struct *napi, int budget)
5371 {
5372         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5373         int work_done = 0;
5374         struct qeth_qdio_buffer *buffer;
5375         int done;
5376         int new_budget = budget;
5377
5378         if (card->options.performance_stats) {
5379                 card->perf_stats.inbound_cnt++;
5380                 card->perf_stats.inbound_start_time = qeth_get_micros();
5381         }
5382
5383         while (1) {
5384                 if (!card->rx.b_count) {
5385                         card->rx.qdio_err = 0;
5386                         card->rx.b_count = qdio_get_next_buffers(
5387                                 card->data.ccwdev, 0, &card->rx.b_index,
5388                                 &card->rx.qdio_err);
5389                         if (card->rx.b_count <= 0) {
5390                                 card->rx.b_count = 0;
5391                                 break;
5392                         }
5393                         card->rx.b_element =
5394                                 &card->qdio.in_q->bufs[card->rx.b_index]
5395                                 .buffer->element[0];
5396                         card->rx.e_offset = 0;
5397                 }
5398
5399                 while (card->rx.b_count) {
5400                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5401                         if (!(card->rx.qdio_err &&
5402                             qeth_check_qdio_errors(card, buffer->buffer,
5403                             card->rx.qdio_err, "qinerr")))
5404                                 work_done +=
5405                                         card->discipline->process_rx_buffer(
5406                                                 card, new_budget, &done);
5407                         else
5408                                 done = 1;
5409
5410                         if (done) {
5411                                 if (card->options.performance_stats)
5412                                         card->perf_stats.bufs_rec++;
5413                                 qeth_put_buffer_pool_entry(card,
5414                                         buffer->pool_entry);
5415                                 qeth_queue_input_buffer(card, card->rx.b_index);
5416                                 card->rx.b_count--;
5417                                 if (card->rx.b_count) {
5418                                         card->rx.b_index =
5419                                                 (card->rx.b_index + 1) %
5420                                                 QDIO_MAX_BUFFERS_PER_Q;
5421                                         card->rx.b_element =
5422                                                 &card->qdio.in_q
5423                                                 ->bufs[card->rx.b_index]
5424                                                 .buffer->element[0];
5425                                         card->rx.e_offset = 0;
5426                                 }
5427                         }
5428
5429                         if (work_done >= budget)
5430                                 goto out;
5431                         else
5432                                 new_budget = budget - work_done;
5433                 }
5434         }
5435
5436         napi_complete(napi);
5437         if (qdio_start_irq(card->data.ccwdev, 0))
5438                 napi_schedule(&card->napi);
5439 out:
5440         if (card->options.performance_stats)
5441                 card->perf_stats.inbound_time += qeth_get_micros() -
5442                         card->perf_stats.inbound_start_time;
5443         return work_done;
5444 }
5445 EXPORT_SYMBOL_GPL(qeth_poll);
5446
5447 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5448 {
5449         if (!cmd->hdr.return_code)
5450                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5451         return cmd->hdr.return_code;
5452 }
5453
5454 int qeth_setassparms_cb(struct qeth_card *card,
5455                         struct qeth_reply *reply, unsigned long data)
5456 {
5457         struct qeth_ipa_cmd *cmd;
5458
5459         QETH_CARD_TEXT(card, 4, "defadpcb");
5460
5461         cmd = (struct qeth_ipa_cmd *) data;
5462         if (cmd->hdr.return_code == 0) {
5463                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5464                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5465                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5466                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5467                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5468         }
5469         return 0;
5470 }
5471 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5472
5473 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5474                                                  enum qeth_ipa_funcs ipa_func,
5475                                                  __u16 cmd_code, __u16 len,
5476                                                  enum qeth_prot_versions prot)
5477 {
5478         struct qeth_cmd_buffer *iob;
5479         struct qeth_ipa_cmd *cmd;
5480
5481         QETH_CARD_TEXT(card, 4, "getasscm");
5482         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5483
5484         if (iob) {
5485                 cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5486                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5487                 cmd->data.setassparms.hdr.length = 8 + len;
5488                 cmd->data.setassparms.hdr.command_code = cmd_code;
5489                 cmd->data.setassparms.hdr.return_code = 0;
5490                 cmd->data.setassparms.hdr.seq_no = 0;
5491         }
5492
5493         return iob;
5494 }
5495 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5496
5497 int qeth_send_setassparms(struct qeth_card *card,
5498                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5499                           int (*reply_cb)(struct qeth_card *,
5500                                           struct qeth_reply *, unsigned long),
5501                           void *reply_param)
5502 {
5503         int rc;
5504         struct qeth_ipa_cmd *cmd;
5505
5506         QETH_CARD_TEXT(card, 4, "sendassp");
5507
5508         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
5509         if (len <= sizeof(__u32))
5510                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5511         else   /* (len > sizeof(__u32)) */
5512                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5513
5514         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5515         return rc;
5516 }
5517 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5518
5519 int qeth_send_simple_setassparms(struct qeth_card *card,
5520                                  enum qeth_ipa_funcs ipa_func,
5521                                  __u16 cmd_code, long data)
5522 {
5523         int rc;
5524         int length = 0;
5525         struct qeth_cmd_buffer *iob;
5526
5527         QETH_CARD_TEXT(card, 4, "simassp4");
5528         if (data)
5529                 length = sizeof(__u32);
5530         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
5531                                        length, QETH_PROT_IPV4);
5532         if (!iob)
5533                 return -ENOMEM;
5534         rc = qeth_send_setassparms(card, iob, length, data,
5535                                    qeth_setassparms_cb, NULL);
5536         return rc;
5537 }
5538 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms);
5539
5540 static void qeth_unregister_dbf_views(void)
5541 {
5542         int x;
5543         for (x = 0; x < QETH_DBF_INFOS; x++) {
5544                 debug_unregister(qeth_dbf[x].id);
5545                 qeth_dbf[x].id = NULL;
5546         }
5547 }
5548
5549 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5550 {
5551         char dbf_txt_buf[32];
5552         va_list args;
5553
5554         if (!debug_level_enabled(id, level))
5555                 return;
5556         va_start(args, fmt);
5557         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5558         va_end(args);
5559         debug_text_event(id, level, dbf_txt_buf);
5560 }
5561 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5562
5563 static int qeth_register_dbf_views(void)
5564 {
5565         int ret;
5566         int x;
5567
5568         for (x = 0; x < QETH_DBF_INFOS; x++) {
5569                 /* register the areas */
5570                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5571                                                 qeth_dbf[x].pages,
5572                                                 qeth_dbf[x].areas,
5573                                                 qeth_dbf[x].len);
5574                 if (qeth_dbf[x].id == NULL) {
5575                         qeth_unregister_dbf_views();
5576                         return -ENOMEM;
5577                 }
5578
5579                 /* register a view */
5580                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5581                 if (ret) {
5582                         qeth_unregister_dbf_views();
5583                         return ret;
5584                 }
5585
5586                 /* set a passing level */
5587                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5588         }
5589
5590         return 0;
5591 }
5592
5593 int qeth_core_load_discipline(struct qeth_card *card,
5594                 enum qeth_discipline_id discipline)
5595 {
5596         int rc = 0;
5597
5598         mutex_lock(&qeth_mod_mutex);
5599         switch (discipline) {
5600         case QETH_DISCIPLINE_LAYER3:
5601                 card->discipline = try_then_request_module(
5602                         symbol_get(qeth_l3_discipline), "qeth_l3");
5603                 break;
5604         case QETH_DISCIPLINE_LAYER2:
5605                 card->discipline = try_then_request_module(
5606                         symbol_get(qeth_l2_discipline), "qeth_l2");
5607                 break;
5608         default:
5609                 break;
5610         }
5611
5612         if (!card->discipline) {
5613                 dev_err(&card->gdev->dev, "There is no kernel module to "
5614                         "support discipline %d\n", discipline);
5615                 rc = -EINVAL;
5616         }
5617         mutex_unlock(&qeth_mod_mutex);
5618         return rc;
5619 }
5620
5621 void qeth_core_free_discipline(struct qeth_card *card)
5622 {
5623         if (card->options.layer2)
5624                 symbol_put(qeth_l2_discipline);
5625         else
5626                 symbol_put(qeth_l3_discipline);
5627         card->discipline = NULL;
5628 }
5629
5630 const struct device_type qeth_generic_devtype = {
5631         .name = "qeth_generic",
5632         .groups = qeth_generic_attr_groups,
5633 };
5634 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5635
5636 static const struct device_type qeth_osn_devtype = {
5637         .name = "qeth_osn",
5638         .groups = qeth_osn_attr_groups,
5639 };
5640
5641 #define DBF_NAME_LEN    20
5642
5643 struct qeth_dbf_entry {
5644         char dbf_name[DBF_NAME_LEN];
5645         debug_info_t *dbf_info;
5646         struct list_head dbf_list;
5647 };
5648
5649 static LIST_HEAD(qeth_dbf_list);
5650 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5651
5652 static debug_info_t *qeth_get_dbf_entry(char *name)
5653 {
5654         struct qeth_dbf_entry *entry;
5655         debug_info_t *rc = NULL;
5656
5657         mutex_lock(&qeth_dbf_list_mutex);
5658         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5659                 if (strcmp(entry->dbf_name, name) == 0) {
5660                         rc = entry->dbf_info;
5661                         break;
5662                 }
5663         }
5664         mutex_unlock(&qeth_dbf_list_mutex);
5665         return rc;
5666 }
5667
5668 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5669 {
5670         struct qeth_dbf_entry *new_entry;
5671
5672         card->debug = debug_register(name, 2, 1, 8);
5673         if (!card->debug) {
5674                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5675                 goto err;
5676         }
5677         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5678                 goto err_dbg;
5679         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5680         if (!new_entry)
5681                 goto err_dbg;
5682         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5683         new_entry->dbf_info = card->debug;
5684         mutex_lock(&qeth_dbf_list_mutex);
5685         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5686         mutex_unlock(&qeth_dbf_list_mutex);
5687
5688         return 0;
5689
5690 err_dbg:
5691         debug_unregister(card->debug);
5692 err:
5693         return -ENOMEM;
5694 }
5695
5696 static void qeth_clear_dbf_list(void)
5697 {
5698         struct qeth_dbf_entry *entry, *tmp;
5699
5700         mutex_lock(&qeth_dbf_list_mutex);
5701         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5702                 list_del(&entry->dbf_list);
5703                 debug_unregister(entry->dbf_info);
5704                 kfree(entry);
5705         }
5706         mutex_unlock(&qeth_dbf_list_mutex);
5707 }
5708
5709 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5710 {
5711         struct qeth_card *card;
5712         struct device *dev;
5713         int rc;
5714         enum qeth_discipline_id enforced_disc;
5715         unsigned long flags;
5716         char dbf_name[DBF_NAME_LEN];
5717
5718         QETH_DBF_TEXT(SETUP, 2, "probedev");
5719
5720         dev = &gdev->dev;
5721         if (!get_device(dev))
5722                 return -ENODEV;
5723
5724         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5725
5726         card = qeth_alloc_card();
5727         if (!card) {
5728                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5729                 rc = -ENOMEM;
5730                 goto err_dev;
5731         }
5732
5733         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5734                 dev_name(&gdev->dev));
5735         card->debug = qeth_get_dbf_entry(dbf_name);
5736         if (!card->debug) {
5737                 rc = qeth_add_dbf_entry(card, dbf_name);
5738                 if (rc)
5739                         goto err_card;
5740         }
5741
5742         card->read.ccwdev  = gdev->cdev[0];
5743         card->write.ccwdev = gdev->cdev[1];
5744         card->data.ccwdev  = gdev->cdev[2];
5745         dev_set_drvdata(&gdev->dev, card);
5746         card->gdev = gdev;
5747         gdev->cdev[0]->handler = qeth_irq;
5748         gdev->cdev[1]->handler = qeth_irq;
5749         gdev->cdev[2]->handler = qeth_irq;
5750
5751         rc = qeth_determine_card_type(card);
5752         if (rc) {
5753                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5754                 goto err_card;
5755         }
5756         rc = qeth_setup_card(card);
5757         if (rc) {
5758                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5759                 goto err_card;
5760         }
5761
5762         qeth_determine_capabilities(card);
5763         enforced_disc = qeth_enforce_discipline(card);
5764         switch (enforced_disc) {
5765         case QETH_DISCIPLINE_UNDETERMINED:
5766                 gdev->dev.type = &qeth_generic_devtype;
5767                 break;
5768         default:
5769                 card->info.layer_enforced = true;
5770                 rc = qeth_core_load_discipline(card, enforced_disc);
5771                 if (rc)
5772                         goto err_card;
5773
5774                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5775                                         ? card->discipline->devtype
5776                                         : &qeth_osn_devtype;
5777                 rc = card->discipline->setup(card->gdev);
5778                 if (rc)
5779                         goto err_disc;
5780                 break;
5781         }
5782
5783         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5784         list_add_tail(&card->list, &qeth_core_card_list.list);
5785         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5786         return 0;
5787
5788 err_disc:
5789         qeth_core_free_discipline(card);
5790 err_card:
5791         qeth_core_free_card(card);
5792 err_dev:
5793         put_device(dev);
5794         return rc;
5795 }
5796
5797 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5798 {
5799         unsigned long flags;
5800         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5801
5802         QETH_DBF_TEXT(SETUP, 2, "removedv");
5803
5804         if (card->discipline) {
5805                 card->discipline->remove(gdev);
5806                 qeth_core_free_discipline(card);
5807         }
5808
5809         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5810         list_del(&card->list);
5811         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5812         qeth_core_free_card(card);
5813         dev_set_drvdata(&gdev->dev, NULL);
5814         put_device(&gdev->dev);
5815         return;
5816 }
5817
5818 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5819 {
5820         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5821         int rc = 0;
5822         enum qeth_discipline_id def_discipline;
5823
5824         if (!card->discipline) {
5825                 if (card->info.type == QETH_CARD_TYPE_IQD)
5826                         def_discipline = QETH_DISCIPLINE_LAYER3;
5827                 else
5828                         def_discipline = QETH_DISCIPLINE_LAYER2;
5829                 rc = qeth_core_load_discipline(card, def_discipline);
5830                 if (rc)
5831                         goto err;
5832                 rc = card->discipline->setup(card->gdev);
5833                 if (rc) {
5834                         qeth_core_free_discipline(card);
5835                         goto err;
5836                 }
5837         }
5838         rc = card->discipline->set_online(gdev);
5839 err:
5840         return rc;
5841 }
5842
5843 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5844 {
5845         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5846         return card->discipline->set_offline(gdev);
5847 }
5848
5849 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5850 {
5851         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5852         qeth_set_allowed_threads(card, 0, 1);
5853         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5854                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5855         qeth_qdio_clear_card(card, 0);
5856         qeth_clear_qdio_buffers(card);
5857         qdio_free(CARD_DDEV(card));
5858 }
5859
5860 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5861 {
5862         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5863         if (card->discipline && card->discipline->freeze)
5864                 return card->discipline->freeze(gdev);
5865         return 0;
5866 }
5867
5868 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5869 {
5870         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5871         if (card->discipline && card->discipline->thaw)
5872                 return card->discipline->thaw(gdev);
5873         return 0;
5874 }
5875
5876 static int qeth_core_restore(struct ccwgroup_device *gdev)
5877 {
5878         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5879         if (card->discipline && card->discipline->restore)
5880                 return card->discipline->restore(gdev);
5881         return 0;
5882 }
5883
5884 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5885         .driver = {
5886                 .owner = THIS_MODULE,
5887                 .name = "qeth",
5888         },
5889         .setup = qeth_core_probe_device,
5890         .remove = qeth_core_remove_device,
5891         .set_online = qeth_core_set_online,
5892         .set_offline = qeth_core_set_offline,
5893         .shutdown = qeth_core_shutdown,
5894         .prepare = NULL,
5895         .complete = NULL,
5896         .freeze = qeth_core_freeze,
5897         .thaw = qeth_core_thaw,
5898         .restore = qeth_core_restore,
5899 };
5900
5901 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5902                            size_t count)
5903 {
5904         int err;
5905
5906         err = ccwgroup_create_dev(qeth_core_root_dev,
5907                                   &qeth_core_ccwgroup_driver, 3, buf);
5908
5909         return err ? err : count;
5910 }
5911 static DRIVER_ATTR_WO(group);
5912
5913 static struct attribute *qeth_drv_attrs[] = {
5914         &driver_attr_group.attr,
5915         NULL,
5916 };
5917 static struct attribute_group qeth_drv_attr_group = {
5918         .attrs = qeth_drv_attrs,
5919 };
5920 static const struct attribute_group *qeth_drv_attr_groups[] = {
5921         &qeth_drv_attr_group,
5922         NULL,
5923 };
5924
5925 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5926 {
5927         struct qeth_card *card = dev->ml_priv;
5928         struct mii_ioctl_data *mii_data;
5929         int rc = 0;
5930
5931         if (!card)
5932                 return -ENODEV;
5933
5934         if (!qeth_card_hw_is_reachable(card))
5935                 return -ENODEV;
5936
5937         if (card->info.type == QETH_CARD_TYPE_OSN)
5938                 return -EPERM;
5939
5940         switch (cmd) {
5941         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5942                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5943                 break;
5944         case SIOC_QETH_GET_CARD_TYPE:
5945                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5946                      card->info.type == QETH_CARD_TYPE_OSM ||
5947                      card->info.type == QETH_CARD_TYPE_OSX) &&
5948                     !card->info.guestlan)
5949                         return 1;
5950                 else
5951                         return 0;
5952         case SIOCGMIIPHY:
5953                 mii_data = if_mii(rq);
5954                 mii_data->phy_id = 0;
5955                 break;
5956         case SIOCGMIIREG:
5957                 mii_data = if_mii(rq);
5958                 if (mii_data->phy_id != 0)
5959                         rc = -EINVAL;
5960                 else
5961                         mii_data->val_out = qeth_mdio_read(dev,
5962                                 mii_data->phy_id, mii_data->reg_num);
5963                 break;
5964         case SIOC_QETH_QUERY_OAT:
5965                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5966                 break;
5967         default:
5968                 if (card->discipline->do_ioctl)
5969                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5970                 else
5971                         rc = -EOPNOTSUPP;
5972         }
5973         if (rc)
5974                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5975         return rc;
5976 }
5977 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5978
5979 static struct {
5980         const char str[ETH_GSTRING_LEN];
5981 } qeth_ethtool_stats_keys[] = {
5982 /*  0 */{"rx skbs"},
5983         {"rx buffers"},
5984         {"tx skbs"},
5985         {"tx buffers"},
5986         {"tx skbs no packing"},
5987         {"tx buffers no packing"},
5988         {"tx skbs packing"},
5989         {"tx buffers packing"},
5990         {"tx sg skbs"},
5991         {"tx sg frags"},
5992 /* 10 */{"rx sg skbs"},
5993         {"rx sg frags"},
5994         {"rx sg page allocs"},
5995         {"tx large kbytes"},
5996         {"tx large count"},
5997         {"tx pk state ch n->p"},
5998         {"tx pk state ch p->n"},
5999         {"tx pk watermark low"},
6000         {"tx pk watermark high"},
6001         {"queue 0 buffer usage"},
6002 /* 20 */{"queue 1 buffer usage"},
6003         {"queue 2 buffer usage"},
6004         {"queue 3 buffer usage"},
6005         {"rx poll time"},
6006         {"rx poll count"},
6007         {"rx do_QDIO time"},
6008         {"rx do_QDIO count"},
6009         {"tx handler time"},
6010         {"tx handler count"},
6011         {"tx time"},
6012 /* 30 */{"tx count"},
6013         {"tx do_QDIO time"},
6014         {"tx do_QDIO count"},
6015         {"tx csum"},
6016         {"tx lin"},
6017         {"tx linfail"},
6018         {"cq handler count"},
6019         {"cq handler time"}
6020 };
6021
6022 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6023 {
6024         switch (stringset) {
6025         case ETH_SS_STATS:
6026                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6027         default:
6028                 return -EINVAL;
6029         }
6030 }
6031 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6032
6033 void qeth_core_get_ethtool_stats(struct net_device *dev,
6034                 struct ethtool_stats *stats, u64 *data)
6035 {
6036         struct qeth_card *card = dev->ml_priv;
6037         data[0] = card->stats.rx_packets -
6038                                 card->perf_stats.initial_rx_packets;
6039         data[1] = card->perf_stats.bufs_rec;
6040         data[2] = card->stats.tx_packets -
6041                                 card->perf_stats.initial_tx_packets;
6042         data[3] = card->perf_stats.bufs_sent;
6043         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6044                         - card->perf_stats.skbs_sent_pack;
6045         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6046         data[6] = card->perf_stats.skbs_sent_pack;
6047         data[7] = card->perf_stats.bufs_sent_pack;
6048         data[8] = card->perf_stats.sg_skbs_sent;
6049         data[9] = card->perf_stats.sg_frags_sent;
6050         data[10] = card->perf_stats.sg_skbs_rx;
6051         data[11] = card->perf_stats.sg_frags_rx;
6052         data[12] = card->perf_stats.sg_alloc_page_rx;
6053         data[13] = (card->perf_stats.large_send_bytes >> 10);
6054         data[14] = card->perf_stats.large_send_cnt;
6055         data[15] = card->perf_stats.sc_dp_p;
6056         data[16] = card->perf_stats.sc_p_dp;
6057         data[17] = QETH_LOW_WATERMARK_PACK;
6058         data[18] = QETH_HIGH_WATERMARK_PACK;
6059         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6060         data[20] = (card->qdio.no_out_queues > 1) ?
6061                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6062         data[21] = (card->qdio.no_out_queues > 2) ?
6063                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6064         data[22] = (card->qdio.no_out_queues > 3) ?
6065                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6066         data[23] = card->perf_stats.inbound_time;
6067         data[24] = card->perf_stats.inbound_cnt;
6068         data[25] = card->perf_stats.inbound_do_qdio_time;
6069         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6070         data[27] = card->perf_stats.outbound_handler_time;
6071         data[28] = card->perf_stats.outbound_handler_cnt;
6072         data[29] = card->perf_stats.outbound_time;
6073         data[30] = card->perf_stats.outbound_cnt;
6074         data[31] = card->perf_stats.outbound_do_qdio_time;
6075         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6076         data[33] = card->perf_stats.tx_csum;
6077         data[34] = card->perf_stats.tx_lin;
6078         data[35] = card->perf_stats.tx_linfail;
6079         data[36] = card->perf_stats.cq_cnt;
6080         data[37] = card->perf_stats.cq_time;
6081 }
6082 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6083
6084 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6085 {
6086         switch (stringset) {
6087         case ETH_SS_STATS:
6088                 memcpy(data, &qeth_ethtool_stats_keys,
6089                         sizeof(qeth_ethtool_stats_keys));
6090                 break;
6091         default:
6092                 WARN_ON(1);
6093                 break;
6094         }
6095 }
6096 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6097
6098 void qeth_core_get_drvinfo(struct net_device *dev,
6099                 struct ethtool_drvinfo *info)
6100 {
6101         struct qeth_card *card = dev->ml_priv;
6102
6103         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
6104                 sizeof(info->driver));
6105         strlcpy(info->version, "1.0", sizeof(info->version));
6106         strlcpy(info->fw_version, card->info.mcl_level,
6107                 sizeof(info->fw_version));
6108         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6109                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6110 }
6111 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6112
6113 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6114 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6115 /* Always advertise and support all speeds up to specified, and only one     */
6116 /* specified port type.                                                      */
6117 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6118                                 int maxspeed, int porttype)
6119 {
6120         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6121         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6122         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6123
6124         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6125         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6126
6127         switch (porttype) {
6128         case PORT_TP:
6129                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6130                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6131                 break;
6132         case PORT_FIBRE:
6133                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6134                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6135                 break;
6136         default:
6137                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6138                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6139                 WARN_ON_ONCE(1);
6140         }
6141
6142         /* fallthrough from high to low, to select all legal speeds: */
6143         switch (maxspeed) {
6144         case SPEED_10000:
6145                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6146                                                      10000baseT_Full);
6147                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6148                                                      10000baseT_Full);
6149         case SPEED_1000:
6150                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6151                                                      1000baseT_Full);
6152                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6153                                                      1000baseT_Full);
6154                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6155                                                      1000baseT_Half);
6156                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6157                                                      1000baseT_Half);
6158         case SPEED_100:
6159                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6160                                                      100baseT_Full);
6161                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6162                                                      100baseT_Full);
6163                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6164                                                      100baseT_Half);
6165                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6166                                                      100baseT_Half);
6167         case SPEED_10:
6168                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6169                                                      10baseT_Full);
6170                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6171                                                      10baseT_Full);
6172                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6173                                                      10baseT_Half);
6174                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6175                                                      10baseT_Half);
6176                 /* end fallthrough */
6177                 break;
6178         default:
6179                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6180                                                      10baseT_Full);
6181                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6182                                                      10baseT_Full);
6183                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6184                                                      10baseT_Half);
6185                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6186                                                      10baseT_Half);
6187                 WARN_ON_ONCE(1);
6188         }
6189 }
6190
6191 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6192                 struct ethtool_link_ksettings *cmd)
6193 {
6194         struct qeth_card *card = netdev->ml_priv;
6195         enum qeth_link_types link_type;
6196         struct carrier_info carrier_info;
6197         int rc;
6198
6199         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6200                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6201         else
6202                 link_type = card->info.link_type;
6203
6204         cmd->base.duplex = DUPLEX_FULL;
6205         cmd->base.autoneg = AUTONEG_ENABLE;
6206         cmd->base.phy_address = 0;
6207         cmd->base.mdio_support = 0;
6208         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6209         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6210
6211         switch (link_type) {
6212         case QETH_LINK_TYPE_FAST_ETH:
6213         case QETH_LINK_TYPE_LANE_ETH100:
6214                 cmd->base.speed = SPEED_100;
6215                 cmd->base.port = PORT_TP;
6216                 break;
6217         case QETH_LINK_TYPE_GBIT_ETH:
6218         case QETH_LINK_TYPE_LANE_ETH1000:
6219                 cmd->base.speed = SPEED_1000;
6220                 cmd->base.port = PORT_FIBRE;
6221                 break;
6222         case QETH_LINK_TYPE_10GBIT_ETH:
6223                 cmd->base.speed = SPEED_10000;
6224                 cmd->base.port = PORT_FIBRE;
6225                 break;
6226         default:
6227                 cmd->base.speed = SPEED_10;
6228                 cmd->base.port = PORT_TP;
6229         }
6230         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6231
6232         /* Check if we can obtain more accurate information.     */
6233         /* If QUERY_CARD_INFO command is not supported or fails, */
6234         /* just return the heuristics that was filled above.     */
6235         if (!qeth_card_hw_is_reachable(card))
6236                 return -ENODEV;
6237         rc = qeth_query_card_info(card, &carrier_info);
6238         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6239                 return 0;
6240         if (rc) /* report error from the hardware operation */
6241                 return rc;
6242         /* on success, fill in the information got from the hardware */
6243
6244         netdev_dbg(netdev,
6245         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6246                         carrier_info.card_type,
6247                         carrier_info.port_mode,
6248                         carrier_info.port_speed);
6249
6250         /* Update attributes for which we've obtained more authoritative */
6251         /* information, leave the rest the way they where filled above.  */
6252         switch (carrier_info.card_type) {
6253         case CARD_INFO_TYPE_1G_COPPER_A:
6254         case CARD_INFO_TYPE_1G_COPPER_B:
6255                 cmd->base.port = PORT_TP;
6256                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6257                 break;
6258         case CARD_INFO_TYPE_1G_FIBRE_A:
6259         case CARD_INFO_TYPE_1G_FIBRE_B:
6260                 cmd->base.port = PORT_FIBRE;
6261                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6262                 break;
6263         case CARD_INFO_TYPE_10G_FIBRE_A:
6264         case CARD_INFO_TYPE_10G_FIBRE_B:
6265                 cmd->base.port = PORT_FIBRE;
6266                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6267                 break;
6268         }
6269
6270         switch (carrier_info.port_mode) {
6271         case CARD_INFO_PORTM_FULLDUPLEX:
6272                 cmd->base.duplex = DUPLEX_FULL;
6273                 break;
6274         case CARD_INFO_PORTM_HALFDUPLEX:
6275                 cmd->base.duplex = DUPLEX_HALF;
6276                 break;
6277         }
6278
6279         switch (carrier_info.port_speed) {
6280         case CARD_INFO_PORTS_10M:
6281                 cmd->base.speed = SPEED_10;
6282                 break;
6283         case CARD_INFO_PORTS_100M:
6284                 cmd->base.speed = SPEED_100;
6285                 break;
6286         case CARD_INFO_PORTS_1G:
6287                 cmd->base.speed = SPEED_1000;
6288                 break;
6289         case CARD_INFO_PORTS_10G:
6290                 cmd->base.speed = SPEED_10000;
6291                 break;
6292         }
6293
6294         return 0;
6295 }
6296 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6297
6298 /* Callback to handle checksum offload command reply from OSA card.
6299  * Verify that required features have been enabled on the card.
6300  * Return error in hdr->return_code as this value is checked by caller.
6301  *
6302  * Always returns zero to indicate no further messages from the OSA card.
6303  */
6304 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6305                                         struct qeth_reply *reply,
6306                                         unsigned long data)
6307 {
6308         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6309         struct qeth_checksum_cmd *chksum_cb =
6310                                 (struct qeth_checksum_cmd *)reply->param;
6311
6312         QETH_CARD_TEXT(card, 4, "chkdoccb");
6313         if (qeth_setassparms_inspect_rc(cmd))
6314                 return 0;
6315
6316         memset(chksum_cb, 0, sizeof(*chksum_cb));
6317         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6318                 chksum_cb->supported =
6319                                 cmd->data.setassparms.data.chksum.supported;
6320                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6321         }
6322         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6323                 chksum_cb->supported =
6324                                 cmd->data.setassparms.data.chksum.supported;
6325                 chksum_cb->enabled =
6326                                 cmd->data.setassparms.data.chksum.enabled;
6327                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6328                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6329         }
6330         return 0;
6331 }
6332
6333 /* Send command to OSA card and check results. */
6334 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6335                                      enum qeth_ipa_funcs ipa_func,
6336                                      __u16 cmd_code, long data,
6337                                      struct qeth_checksum_cmd *chksum_cb)
6338 {
6339         struct qeth_cmd_buffer *iob;
6340         int rc = -ENOMEM;
6341
6342         QETH_CARD_TEXT(card, 4, "chkdocmd");
6343         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6344                                        sizeof(__u32), QETH_PROT_IPV4);
6345         if (iob)
6346                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6347                                            qeth_ipa_checksum_run_cmd_cb,
6348                                            chksum_cb);
6349         return rc;
6350 }
6351
6352 static int qeth_send_checksum_on(struct qeth_card *card, int cstype)
6353 {
6354         const __u32 required_features = QETH_IPA_CHECKSUM_IP_HDR |
6355                                         QETH_IPA_CHECKSUM_UDP |
6356                                         QETH_IPA_CHECKSUM_TCP;
6357         struct qeth_checksum_cmd chksum_cb;
6358         int rc;
6359
6360         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6361                                        &chksum_cb);
6362         if (!rc) {
6363                 if ((required_features & chksum_cb.supported) !=
6364                     required_features)
6365                         rc = -EIO;
6366                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6367                          cstype == IPA_INBOUND_CHECKSUM)
6368                         dev_warn(&card->gdev->dev,
6369                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6370                                  QETH_CARD_IFNAME(card));
6371         }
6372         if (rc) {
6373                 qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
6374                 dev_warn(&card->gdev->dev,
6375                          "Starting HW checksumming for %s failed, using SW checksumming\n",
6376                          QETH_CARD_IFNAME(card));
6377                 return rc;
6378         }
6379         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6380                                        chksum_cb.supported, &chksum_cb);
6381         if (!rc) {
6382                 if ((required_features & chksum_cb.enabled) !=
6383                     required_features)
6384                         rc = -EIO;
6385         }
6386         if (rc) {
6387                 qeth_send_simple_setassparms(card, cstype, IPA_CMD_ASS_STOP, 0);
6388                 dev_warn(&card->gdev->dev,
6389                          "Enabling HW checksumming for %s failed, using SW checksumming\n",
6390                          QETH_CARD_IFNAME(card));
6391                 return rc;
6392         }
6393
6394         dev_info(&card->gdev->dev, "HW Checksumming (%sbound) enabled\n",
6395                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out");
6396         return 0;
6397 }
6398
6399 static int qeth_set_ipa_csum(struct qeth_card *card, int on, int cstype)
6400 {
6401         int rc = (on) ? qeth_send_checksum_on(card, cstype)
6402                       : qeth_send_simple_setassparms(card, cstype,
6403                                                      IPA_CMD_ASS_STOP, 0);
6404         return rc ? -EIO : 0;
6405 }
6406
6407 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6408 {
6409         int rc;
6410
6411         QETH_CARD_TEXT(card, 3, "sttso");
6412
6413         if (on) {
6414                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6415                                                   IPA_CMD_ASS_START, 0);
6416                 if (rc) {
6417                         dev_warn(&card->gdev->dev,
6418                                  "Starting outbound TCP segmentation offload for %s failed\n",
6419                                  QETH_CARD_IFNAME(card));
6420                         return -EIO;
6421                 }
6422                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6423         } else {
6424                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6425                                                   IPA_CMD_ASS_STOP, 0);
6426         }
6427         return rc;
6428 }
6429
6430 /* try to restore device features on a device after recovery */
6431 int qeth_recover_features(struct net_device *dev)
6432 {
6433         struct qeth_card *card = dev->ml_priv;
6434         netdev_features_t recover = dev->features;
6435
6436         if (recover & NETIF_F_IP_CSUM) {
6437                 if (qeth_set_ipa_csum(card, 1, IPA_OUTBOUND_CHECKSUM))
6438                         recover ^= NETIF_F_IP_CSUM;
6439         }
6440         if (recover & NETIF_F_RXCSUM) {
6441                 if (qeth_set_ipa_csum(card, 1, IPA_INBOUND_CHECKSUM))
6442                         recover ^= NETIF_F_RXCSUM;
6443         }
6444         if (recover & NETIF_F_TSO) {
6445                 if (qeth_set_ipa_tso(card, 1))
6446                         recover ^= NETIF_F_TSO;
6447         }
6448
6449         if (recover == dev->features)
6450                 return 0;
6451
6452         dev_warn(&card->gdev->dev,
6453                  "Device recovery failed to restore all offload features\n");
6454         dev->features = recover;
6455         return -EIO;
6456 }
6457 EXPORT_SYMBOL_GPL(qeth_recover_features);
6458
6459 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6460 {
6461         struct qeth_card *card = dev->ml_priv;
6462         netdev_features_t changed = dev->features ^ features;
6463         int rc = 0;
6464
6465         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6466         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6467
6468         if ((changed & NETIF_F_IP_CSUM)) {
6469                 rc = qeth_set_ipa_csum(card,
6470                                        features & NETIF_F_IP_CSUM ? 1 : 0,
6471                                        IPA_OUTBOUND_CHECKSUM);
6472                 if (rc)
6473                         changed ^= NETIF_F_IP_CSUM;
6474         }
6475         if ((changed & NETIF_F_RXCSUM)) {
6476                 rc = qeth_set_ipa_csum(card,
6477                                         features & NETIF_F_RXCSUM ? 1 : 0,
6478                                         IPA_INBOUND_CHECKSUM);
6479                 if (rc)
6480                         changed ^= NETIF_F_RXCSUM;
6481         }
6482         if ((changed & NETIF_F_TSO)) {
6483                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6484                 if (rc)
6485                         changed ^= NETIF_F_TSO;
6486         }
6487
6488         /* everything changed successfully? */
6489         if ((dev->features ^ features) == changed)
6490                 return 0;
6491         /* something went wrong. save changed features and return error */
6492         dev->features ^= changed;
6493         return -EIO;
6494 }
6495 EXPORT_SYMBOL_GPL(qeth_set_features);
6496
6497 netdev_features_t qeth_fix_features(struct net_device *dev,
6498                                     netdev_features_t features)
6499 {
6500         struct qeth_card *card = dev->ml_priv;
6501
6502         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6503         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6504                 features &= ~NETIF_F_IP_CSUM;
6505         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6506                 features &= ~NETIF_F_RXCSUM;
6507         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6508                 features &= ~NETIF_F_TSO;
6509         /* if the card isn't up, remove features that require hw changes */
6510         if (card->state == CARD_STATE_DOWN ||
6511             card->state == CARD_STATE_RECOVER)
6512                 features = features & ~(NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
6513                                         NETIF_F_TSO);
6514         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6515         return features;
6516 }
6517 EXPORT_SYMBOL_GPL(qeth_fix_features);
6518
6519 netdev_features_t qeth_features_check(struct sk_buff *skb,
6520                                       struct net_device *dev,
6521                                       netdev_features_t features)
6522 {
6523         /* GSO segmentation builds skbs with
6524          *      a (small) linear part for the headers, and
6525          *      page frags for the data.
6526          * Compared to a linear skb, the header-only part consumes an
6527          * additional buffer element. This reduces buffer utilization, and
6528          * hurts throughput. So compress small segments into one element.
6529          */
6530         if (netif_needs_gso(skb, features)) {
6531                 /* match skb_segment(): */
6532                 unsigned int doffset = skb->data - skb_mac_header(skb);
6533                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6534                 unsigned int hroom = skb_headroom(skb);
6535
6536                 /* linearize only if resulting skb allocations are order-0: */
6537                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6538                         features &= ~NETIF_F_SG;
6539         }
6540
6541         return vlan_features_check(skb, features);
6542 }
6543 EXPORT_SYMBOL_GPL(qeth_features_check);
6544
6545 static int __init qeth_core_init(void)
6546 {
6547         int rc;
6548
6549         pr_info("loading core functions\n");
6550         INIT_LIST_HEAD(&qeth_core_card_list.list);
6551         INIT_LIST_HEAD(&qeth_dbf_list);
6552         rwlock_init(&qeth_core_card_list.rwlock);
6553         mutex_init(&qeth_mod_mutex);
6554
6555         qeth_wq = create_singlethread_workqueue("qeth_wq");
6556
6557         rc = qeth_register_dbf_views();
6558         if (rc)
6559                 goto out_err;
6560         qeth_core_root_dev = root_device_register("qeth");
6561         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6562         if (rc)
6563                 goto register_err;
6564         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6565                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6566         if (!qeth_core_header_cache) {
6567                 rc = -ENOMEM;
6568                 goto slab_err;
6569         }
6570         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6571                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6572         if (!qeth_qdio_outbuf_cache) {
6573                 rc = -ENOMEM;
6574                 goto cqslab_err;
6575         }
6576         rc = ccw_driver_register(&qeth_ccw_driver);
6577         if (rc)
6578                 goto ccw_err;
6579         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6580         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6581         if (rc)
6582                 goto ccwgroup_err;
6583
6584         return 0;
6585
6586 ccwgroup_err:
6587         ccw_driver_unregister(&qeth_ccw_driver);
6588 ccw_err:
6589         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6590 cqslab_err:
6591         kmem_cache_destroy(qeth_core_header_cache);
6592 slab_err:
6593         root_device_unregister(qeth_core_root_dev);
6594 register_err:
6595         qeth_unregister_dbf_views();
6596 out_err:
6597         pr_err("Initializing the qeth device driver failed\n");
6598         return rc;
6599 }
6600
6601 static void __exit qeth_core_exit(void)
6602 {
6603         qeth_clear_dbf_list();
6604         destroy_workqueue(qeth_wq);
6605         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6606         ccw_driver_unregister(&qeth_ccw_driver);
6607         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6608         kmem_cache_destroy(qeth_core_header_cache);
6609         root_device_unregister(qeth_core_root_dev);
6610         qeth_unregister_dbf_views();
6611         pr_info("core functions removed\n");
6612 }
6613
6614 module_init(qeth_core_init);
6615 module_exit(qeth_core_exit);
6616 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6617 MODULE_DESCRIPTION("qeth core functions");
6618 MODULE_LICENSE("GPL");