drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/ip.h>
  20 #include <linux/tcp.h>
  21 #include <linux/mii.h>
  22 #include <linux/kthread.h>
  23 #include <linux/slab.h>
  24 #include <linux/if_vlan.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/netdev_features.h>
  27 #include <linux/skbuff.h>
  28
  29 #include <net/iucv/af_iucv.h>
  30 #include <net/dsfield.h>
  31
  32 #include <asm/ebcdic.h>
  33 #include <asm/chpid.h>
  34 #include <asm/io.h>
  35 #include <asm/sysinfo.h>
  36 #include <asm/diag.h>
  37 #include <asm/cio.h>
  38 #include <asm/ccwdev.h>
  39 #include <asm/cpcmd.h>
  40
  41 #include "qeth_core.h"
  42
  43 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  44         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  45         /*                   N  P  A    M  L  V                      H  */
  46         [QETH_DBF_SETUP] = {"qeth_setup",
  47                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  48         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  49                             &debug_sprintf_view, NULL},
  50         [QETH_DBF_CTRL]  = {"qeth_control",
  51                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  52 };
  53 EXPORT_SYMBOL_GPL(qeth_dbf);
  54
  55 struct qeth_card_list_struct qeth_core_card_list;
  56 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  57 struct kmem_cache *qeth_core_header_cache;
  58 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  59 static struct kmem_cache *qeth_qdio_outbuf_cache;
  60
  61 static struct device *qeth_core_root_dev;
  62 static struct lock_class_key qdio_out_skb_queue_key;
  63 static struct mutex qeth_mod_mutex;
  64
  65 static void qeth_send_control_data_cb(struct qeth_channel *,
  66                         struct qeth_cmd_buffer *);
  67 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  68 static void qeth_setup_ccw(struct qeth_channel *, unsigned char *, __u32);
  69 static void qeth_free_buffer_pool(struct qeth_card *);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_buffers(struct qeth_card *);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  76 static 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                         kcalloc(card->qdio.no_out_queues *
 378                                         QDIO_MAX_BUFFERS_PER_Q,
 379                                 sizeof(struct qdio_outbuf_state),
 380                                 GFP_KERNEL);
 381                 outbuf_states = card->qdio.out_bufstates;
 382                 if (outbuf_states == NULL) {
 383                         rc = -1;
 384                         goto free_cq_out;
 385                 }
 386                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 387                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 388                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 389                 }
 390         } else {
 391                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 392                 card->qdio.c_q = NULL;
 393                 card->qdio.no_in_queues = 1;
 394         }
 395         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 396         rc = 0;
 397 out:
 398         return rc;
 399 free_cq_out:
 400         qeth_free_qdio_queue(card->qdio.c_q);
 401         card->qdio.c_q = NULL;
 402 kmsg_out:
 403         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 404         goto out;
 405 }
 406
 407 static void qeth_free_cq(struct qeth_card *card)
 408 {
 409         if (card->qdio.c_q) {
 410                 --card->qdio.no_in_queues;
 411                 qeth_free_qdio_queue(card->qdio.c_q);
 412                 card->qdio.c_q = NULL;
 413         }
 414         kfree(card->qdio.out_bufstates);
 415         card->qdio.out_bufstates = NULL;
 416 }
 417
 418 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 419                                                         int delayed)
 420 {
 421         enum iucv_tx_notify n;
 422
 423         switch (sbalf15) {
 424         case 0:
 425                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 426                 break;
 427         case 4:
 428         case 16:
 429         case 17:
 430         case 18:
 431                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 432                         TX_NOTIFY_UNREACHABLE;
 433                 break;
 434         default:
 435                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 436                         TX_NOTIFY_GENERALERROR;
 437                 break;
 438         }
 439
 440         return n;
 441 }
 442
 443 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 444                                          int forced_cleanup)
 445 {
 446         if (q->card->options.cq != QETH_CQ_ENABLED)
 447                 return;
 448
 449         if (q->bufs[bidx]->next_pending != NULL) {
 450                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 451                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 452
 453                 while (c) {
 454                         if (forced_cleanup ||
 455                             atomic_read(&c->state) ==
 456                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 457                                 struct qeth_qdio_out_buffer *f = c;
 458                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 459                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 460                                 /* release here to avoid interleaving between
 461                                    outbound tasklet and inbound tasklet
 462                                    regarding notifications and lifecycle */
 463                                 qeth_release_skbs(c);
 464
 465                                 c = f->next_pending;
 466                                 WARN_ON_ONCE(head->next_pending != f);
 467                                 head->next_pending = c;
 468                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 469                         } else {
 470                                 head = c;
 471                                 c = c->next_pending;
 472                         }
 473
 474                 }
 475         }
 476         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 477                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 478                 /* for recovery situations */
 479                 q->bufs[bidx]->aob = q->bufstates[bidx].aob;
 480                 qeth_init_qdio_out_buf(q, bidx);
 481                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 482         }
 483 }
 484
 485
 486 static void qeth_qdio_handle_aob(struct qeth_card *card,
 487                                  unsigned long phys_aob_addr)
 488 {
 489         struct qaob *aob;
 490         struct qeth_qdio_out_buffer *buffer;
 491         enum iucv_tx_notify notification;
 492
 493         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 494         QETH_CARD_TEXT(card, 5, "haob");
 495         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 496         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 497         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 498
 499         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 500                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 501                 notification = TX_NOTIFY_OK;
 502         } else {
 503                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 504                                                         QETH_QDIO_BUF_PENDING);
 505                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 506                 notification = TX_NOTIFY_DELAYED_OK;
 507         }
 508
 509         if (aob->aorc != 0)  {
 510                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 511                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 512         }
 513         qeth_notify_skbs(buffer->q, buffer, notification);
 514
 515         buffer->aob = NULL;
 516         qeth_clear_output_buffer(buffer->q, buffer,
 517                                  QETH_QDIO_BUF_HANDLED_DELAYED);
 518
 519         /* from here on: do not touch buffer anymore */
 520         qdio_release_aob(aob);
 521 }
 522
 523 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 524 {
 525         return card->options.cq == QETH_CQ_ENABLED &&
 526             card->qdio.c_q != NULL &&
 527             queue != 0 &&
 528             queue == card->qdio.no_in_queues - 1;
 529 }
 530
 531 static int __qeth_issue_next_read(struct qeth_card *card)
 532 {
 533         int rc;
 534         struct qeth_cmd_buffer *iob;
 535
 536         QETH_CARD_TEXT(card, 5, "issnxrd");
 537         if (card->read.state != CH_STATE_UP)
 538                 return -EIO;
 539         iob = qeth_get_buffer(&card->read);
 540         if (!iob) {
 541                 dev_warn(&card->gdev->dev, "The qeth device driver "
 542                         "failed to recover an error on the device\n");
 543                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 544                         "available\n", dev_name(&card->gdev->dev));
 545                 return -ENOMEM;
 546         }
 547         qeth_setup_ccw(&card->read, iob->data, QETH_BUFSIZE);
 548         QETH_CARD_TEXT(card, 6, "noirqpnd");
 549         rc = ccw_device_start(card->read.ccwdev, &card->read.ccw,
 550                               (addr_t) iob, 0, 0);
 551         if (rc) {
 552                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 553                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 554                 atomic_set(&card->read.irq_pending, 0);
 555                 card->read_or_write_problem = 1;
 556                 qeth_schedule_recovery(card);
 557                 wake_up(&card->wait_q);
 558         }
 559         return rc;
 560 }
 561
 562 static int qeth_issue_next_read(struct qeth_card *card)
 563 {
 564         int ret;
 565
 566         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 567         ret = __qeth_issue_next_read(card);
 568         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 569
 570         return ret;
 571 }
 572
 573 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 574 {
 575         struct qeth_reply *reply;
 576
 577         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 578         if (reply) {
 579                 refcount_set(&reply->refcnt, 1);
 580                 atomic_set(&reply->received, 0);
 581                 reply->card = card;
 582         }
 583         return reply;
 584 }
 585
 586 static void qeth_get_reply(struct qeth_reply *reply)
 587 {
 588         refcount_inc(&reply->refcnt);
 589 }
 590
 591 static void qeth_put_reply(struct qeth_reply *reply)
 592 {
 593         if (refcount_dec_and_test(&reply->refcnt))
 594                 kfree(reply);
 595 }
 596
 597 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 598                 struct qeth_card *card)
 599 {
 600         char *ipa_name;
 601         int com = cmd->hdr.command;
 602         ipa_name = qeth_get_ipa_cmd_name(com);
 603         if (rc)
 604                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 605                                 "x%X \"%s\"\n",
 606                                 ipa_name, com, dev_name(&card->gdev->dev),
 607                                 QETH_CARD_IFNAME(card), rc,
 608                                 qeth_get_ipa_msg(rc));
 609         else
 610                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 611                                 ipa_name, com, dev_name(&card->gdev->dev),
 612                                 QETH_CARD_IFNAME(card));
 613 }
 614
 615 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 616                 struct qeth_cmd_buffer *iob)
 617 {
 618         struct qeth_ipa_cmd *cmd = NULL;
 619
 620         QETH_CARD_TEXT(card, 5, "chkipad");
 621         if (IS_IPA(iob->data)) {
 622                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 623                 if (IS_IPA_REPLY(cmd)) {
 624                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 625                             cmd->hdr.command != IPA_CMD_DELCCID &&
 626                             cmd->hdr.command != IPA_CMD_MODCCID &&
 627                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 628                                 qeth_issue_ipa_msg(cmd,
 629                                                 cmd->hdr.return_code, card);
 630                         return cmd;
 631                 } else {
 632                         switch (cmd->hdr.command) {
 633                         case IPA_CMD_STOPLAN:
 634                                 if (cmd->hdr.return_code ==
 635                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 636                                         dev_err(&card->gdev->dev,
 637                                            "Interface %s is down because the "
 638                                            "adjacent port is no longer in "
 639                                            "reflective relay mode\n",
 640                                            QETH_CARD_IFNAME(card));
 641                                         qeth_close_dev(card);
 642                                 } else {
 643                                         dev_warn(&card->gdev->dev,
 644                                            "The link for interface %s on CHPID"
 645                                            " 0x%X failed\n",
 646                                            QETH_CARD_IFNAME(card),
 647                                            card->info.chpid);
 648                                         qeth_issue_ipa_msg(cmd,
 649                                                 cmd->hdr.return_code, card);
 650                                 }
 651                                 card->lan_online = 0;
 652                                 if (card->dev && netif_carrier_ok(card->dev))
 653                                         netif_carrier_off(card->dev);
 654                                 return NULL;
 655                         case IPA_CMD_STARTLAN:
 656                                 dev_info(&card->gdev->dev,
 657                                            "The link for %s on CHPID 0x%X has"
 658                                            " been restored\n",
 659                                            QETH_CARD_IFNAME(card),
 660                                            card->info.chpid);
 661                                 netif_carrier_on(card->dev);
 662                                 card->lan_online = 1;
 663                                 if (card->info.hwtrap)
 664                                         card->info.hwtrap = 2;
 665                                 qeth_schedule_recovery(card);
 666                                 return NULL;
 667                         case IPA_CMD_SETBRIDGEPORT_IQD:
 668                         case IPA_CMD_SETBRIDGEPORT_OSA:
 669                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 670                                 if (card->discipline->control_event_handler
 671                                                                 (card, cmd))
 672                                         return cmd;
 673                                 else
 674                                         return NULL;
 675                         case IPA_CMD_MODCCID:
 676                                 return cmd;
 677                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 678                                 QETH_CARD_TEXT(card, 3, "irla");
 679                                 break;
 680                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 681                                 QETH_CARD_TEXT(card, 3, "urla");
 682                                 break;
 683                         default:
 684                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 685                                            "but not a reply!\n");
 686                                 break;
 687                         }
 688                 }
 689         }
 690         return cmd;
 691 }
 692
 693 void qeth_clear_ipacmd_list(struct qeth_card *card)
 694 {
 695         struct qeth_reply *reply, *r;
 696         unsigned long flags;
 697
 698         QETH_CARD_TEXT(card, 4, "clipalst");
 699
 700         spin_lock_irqsave(&card->lock, flags);
 701         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 702                 qeth_get_reply(reply);
 703                 reply->rc = -EIO;
 704                 atomic_inc(&reply->received);
 705                 list_del_init(&reply->list);
 706                 wake_up(&reply->wait_q);
 707                 qeth_put_reply(reply);
 708         }
 709         spin_unlock_irqrestore(&card->lock, flags);
 710 }
 711 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 712
 713 static int qeth_check_idx_response(struct qeth_card *card,
 714         unsigned char *buffer)
 715 {
 716         if (!buffer)
 717                 return 0;
 718
 719         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 720         if ((buffer[2] & 0xc0) == 0xc0) {
 721                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#02x\n",
 722                                  buffer[4]);
 723                 QETH_CARD_TEXT(card, 2, "ckidxres");
 724                 QETH_CARD_TEXT(card, 2, " idxterm");
 725                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 726                 if (buffer[4] == 0xf6) {
 727                         dev_err(&card->gdev->dev,
 728                         "The qeth device is not configured "
 729                         "for the OSI layer required by z/VM\n");
 730                         return -EPERM;
 731                 }
 732                 return -EIO;
 733         }
 734         return 0;
 735 }
 736
 737 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 738 {
 739         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 740                 dev_get_drvdata(&cdev->dev))->dev);
 741         return card;
 742 }
 743
 744 static void qeth_setup_ccw(struct qeth_channel *channel, unsigned char *iob,
 745                 __u32 len)
 746 {
 747         struct qeth_card *card;
 748
 749         card = CARD_FROM_CDEV(channel->ccwdev);
 750         QETH_CARD_TEXT(card, 4, "setupccw");
 751         if (channel == &card->read)
 752                 memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
 753         else
 754                 memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
 755         channel->ccw.count = len;
 756         channel->ccw.cda = (__u32) __pa(iob);
 757 }
 758
 759 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 760 {
 761         __u8 index;
 762
 763         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 764         index = channel->io_buf_no;
 765         do {
 766                 if (channel->iob[index].state == BUF_STATE_FREE) {
 767                         channel->iob[index].state = BUF_STATE_LOCKED;
 768                         channel->io_buf_no = (channel->io_buf_no + 1) %
 769                                 QETH_CMD_BUFFER_NO;
 770                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 771                         return channel->iob + index;
 772                 }
 773                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 774         } while (index != channel->io_buf_no);
 775
 776         return NULL;
 777 }
 778
 779 void qeth_release_buffer(struct qeth_channel *channel,
 780                 struct qeth_cmd_buffer *iob)
 781 {
 782         unsigned long flags;
 783
 784         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 785         spin_lock_irqsave(&channel->iob_lock, flags);
 786         memset(iob->data, 0, QETH_BUFSIZE);
 787         iob->state = BUF_STATE_FREE;
 788         iob->callback = qeth_send_control_data_cb;
 789         iob->rc = 0;
 790         spin_unlock_irqrestore(&channel->iob_lock, flags);
 791         wake_up(&channel->wait_q);
 792 }
 793 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 794
 795 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 796 {
 797         struct qeth_cmd_buffer *buffer = NULL;
 798         unsigned long flags;
 799
 800         spin_lock_irqsave(&channel->iob_lock, flags);
 801         buffer = __qeth_get_buffer(channel);
 802         spin_unlock_irqrestore(&channel->iob_lock, flags);
 803         return buffer;
 804 }
 805
 806 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 807 {
 808         struct qeth_cmd_buffer *buffer;
 809         wait_event(channel->wait_q,
 810                    ((buffer = qeth_get_buffer(channel)) != NULL));
 811         return buffer;
 812 }
 813 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 814
 815 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 816 {
 817         int cnt;
 818
 819         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 820                 qeth_release_buffer(channel, &channel->iob[cnt]);
 821         channel->io_buf_no = 0;
 822 }
 823 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 824
 825 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 826                   struct qeth_cmd_buffer *iob)
 827 {
 828         struct qeth_card *card;
 829         struct qeth_reply *reply, *r;
 830         struct qeth_ipa_cmd *cmd;
 831         unsigned long flags;
 832         int keep_reply;
 833         int rc = 0;
 834
 835         card = CARD_FROM_CDEV(channel->ccwdev);
 836         QETH_CARD_TEXT(card, 4, "sndctlcb");
 837         rc = qeth_check_idx_response(card, iob->data);
 838         switch (rc) {
 839         case 0:
 840                 break;
 841         case -EIO:
 842                 qeth_clear_ipacmd_list(card);
 843                 qeth_schedule_recovery(card);
 844                 /* fall through */
 845         default:
 846                 goto out;
 847         }
 848
 849         cmd = qeth_check_ipa_data(card, iob);
 850         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 851                 goto out;
 852         /*in case of OSN : check if cmd is set */
 853         if (card->info.type == QETH_CARD_TYPE_OSN &&
 854             cmd &&
 855             cmd->hdr.command != IPA_CMD_STARTLAN &&
 856             card->osn_info.assist_cb != NULL) {
 857                 card->osn_info.assist_cb(card->dev, cmd);
 858                 goto out;
 859         }
 860
 861         spin_lock_irqsave(&card->lock, flags);
 862         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 863                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 864                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 865                         qeth_get_reply(reply);
 866                         list_del_init(&reply->list);
 867                         spin_unlock_irqrestore(&card->lock, flags);
 868                         keep_reply = 0;
 869                         if (reply->callback != NULL) {
 870                                 if (cmd) {
 871                                         reply->offset = (__u16)((char *)cmd -
 872                                                         (char *)iob->data);
 873                                         keep_reply = reply->callback(card,
 874                                                         reply,
 875                                                         (unsigned long)cmd);
 876                                 } else
 877                                         keep_reply = reply->callback(card,
 878                                                         reply,
 879                                                         (unsigned long)iob);
 880                         }
 881                         if (cmd)
 882                                 reply->rc = (u16) cmd->hdr.return_code;
 883                         else if (iob->rc)
 884                                 reply->rc = iob->rc;
 885                         if (keep_reply) {
 886                                 spin_lock_irqsave(&card->lock, flags);
 887                                 list_add_tail(&reply->list,
 888                                               &card->cmd_waiter_list);
 889                                 spin_unlock_irqrestore(&card->lock, flags);
 890                         } else {
 891                                 atomic_inc(&reply->received);
 892                                 wake_up(&reply->wait_q);
 893                         }
 894                         qeth_put_reply(reply);
 895                         goto out;
 896                 }
 897         }
 898         spin_unlock_irqrestore(&card->lock, flags);
 899 out:
 900         memcpy(&card->seqno.pdu_hdr_ack,
 901                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 902                 QETH_SEQ_NO_LENGTH);
 903         qeth_release_buffer(channel, iob);
 904 }
 905
 906 static int qeth_setup_channel(struct qeth_channel *channel)
 907 {
 908         int cnt;
 909
 910         QETH_DBF_TEXT(SETUP, 2, "setupch");
 911         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
 912                 channel->iob[cnt].data =
 913                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
 914                 if (channel->iob[cnt].data == NULL)
 915                         break;
 916                 channel->iob[cnt].state = BUF_STATE_FREE;
 917                 channel->iob[cnt].channel = channel;
 918                 channel->iob[cnt].callback = qeth_send_control_data_cb;
 919                 channel->iob[cnt].rc = 0;
 920         }
 921         if (cnt < QETH_CMD_BUFFER_NO) {
 922                 while (cnt-- > 0)
 923                         kfree(channel->iob[cnt].data);
 924                 return -ENOMEM;
 925         }
 926         channel->io_buf_no = 0;
 927         atomic_set(&channel->irq_pending, 0);
 928         spin_lock_init(&channel->iob_lock);
 929
 930         init_waitqueue_head(&channel->wait_q);
 931         return 0;
 932 }
 933
 934 static int qeth_set_thread_start_bit(struct qeth_card *card,
 935                 unsigned long thread)
 936 {
 937         unsigned long flags;
 938
 939         spin_lock_irqsave(&card->thread_mask_lock, flags);
 940         if (!(card->thread_allowed_mask & thread) ||
 941               (card->thread_start_mask & thread)) {
 942                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 943                 return -EPERM;
 944         }
 945         card->thread_start_mask |= thread;
 946         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 947         return 0;
 948 }
 949
 950 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 951 {
 952         unsigned long flags;
 953
 954         spin_lock_irqsave(&card->thread_mask_lock, flags);
 955         card->thread_start_mask &= ~thread;
 956         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 957         wake_up(&card->wait_q);
 958 }
 959 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 960
 961 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 962 {
 963         unsigned long flags;
 964
 965         spin_lock_irqsave(&card->thread_mask_lock, flags);
 966         card->thread_running_mask &= ~thread;
 967         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 968         wake_up_all(&card->wait_q);
 969 }
 970 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 971
 972 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 973 {
 974         unsigned long flags;
 975         int rc = 0;
 976
 977         spin_lock_irqsave(&card->thread_mask_lock, flags);
 978         if (card->thread_start_mask & thread) {
 979                 if ((card->thread_allowed_mask & thread) &&
 980                     !(card->thread_running_mask & thread)) {
 981                         rc = 1;
 982                         card->thread_start_mask &= ~thread;
 983                         card->thread_running_mask |= thread;
 984                 } else
 985                         rc = -EPERM;
 986         }
 987         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 988         return rc;
 989 }
 990
 991 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 992 {
 993         int rc = 0;
 994
 995         wait_event(card->wait_q,
 996                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 997         return rc;
 998 }
 999 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
1000
1001 void qeth_schedule_recovery(struct qeth_card *card)
1002 {
1003         QETH_CARD_TEXT(card, 2, "startrec");
1004         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
1005                 schedule_work(&card->kernel_thread_starter);
1006 }
1007 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
1008
1009 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
1010 {
1011         int dstat, cstat;
1012         char *sense;
1013         struct qeth_card *card;
1014
1015         sense = (char *) irb->ecw;
1016         cstat = irb->scsw.cmd.cstat;
1017         dstat = irb->scsw.cmd.dstat;
1018         card = CARD_FROM_CDEV(cdev);
1019
1020         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1021                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1022                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1023                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1024                 dev_warn(&cdev->dev, "The qeth device driver "
1025                         "failed to recover an error on the device\n");
1026                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
1027                         dev_name(&cdev->dev), dstat, cstat);
1028                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1029                                 16, 1, irb, 64, 1);
1030                 return 1;
1031         }
1032
1033         if (dstat & DEV_STAT_UNIT_CHECK) {
1034                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1035                     SENSE_RESETTING_EVENT_FLAG) {
1036                         QETH_CARD_TEXT(card, 2, "REVIND");
1037                         return 1;
1038                 }
1039                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1040                     SENSE_COMMAND_REJECT_FLAG) {
1041                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1042                         return 1;
1043                 }
1044                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1045                         QETH_CARD_TEXT(card, 2, "AFFE");
1046                         return 1;
1047                 }
1048                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1049                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1050                         return 0;
1051                 }
1052                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1053                         return 1;
1054         }
1055         return 0;
1056 }
1057
1058 static long __qeth_check_irb_error(struct ccw_device *cdev,
1059                 unsigned long intparm, struct irb *irb)
1060 {
1061         struct qeth_card *card;
1062
1063         card = CARD_FROM_CDEV(cdev);
1064
1065         if (!card || !IS_ERR(irb))
1066                 return 0;
1067
1068         switch (PTR_ERR(irb)) {
1069         case -EIO:
1070                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1071                         dev_name(&cdev->dev));
1072                 QETH_CARD_TEXT(card, 2, "ckirberr");
1073                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1074                 break;
1075         case -ETIMEDOUT:
1076                 dev_warn(&cdev->dev, "A hardware operation timed out"
1077                         " on the device\n");
1078                 QETH_CARD_TEXT(card, 2, "ckirberr");
1079                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1080                 if (intparm == QETH_RCD_PARM) {
1081                         if (card->data.ccwdev == cdev) {
1082                                 card->data.state = CH_STATE_DOWN;
1083                                 wake_up(&card->wait_q);
1084                         }
1085                 }
1086                 break;
1087         default:
1088                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1089                         dev_name(&cdev->dev), PTR_ERR(irb));
1090                 QETH_CARD_TEXT(card, 2, "ckirberr");
1091                 QETH_CARD_TEXT(card, 2, "  rc???");
1092         }
1093         return PTR_ERR(irb);
1094 }
1095
1096 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1097                 struct irb *irb)
1098 {
1099         int rc;
1100         int cstat, dstat;
1101         struct qeth_cmd_buffer *iob = NULL;
1102         struct qeth_channel *channel;
1103         struct qeth_card *card;
1104
1105         card = CARD_FROM_CDEV(cdev);
1106         if (!card)
1107                 return;
1108
1109         QETH_CARD_TEXT(card, 5, "irq");
1110
1111         if (card->read.ccwdev == cdev) {
1112                 channel = &card->read;
1113                 QETH_CARD_TEXT(card, 5, "read");
1114         } else if (card->write.ccwdev == cdev) {
1115                 channel = &card->write;
1116                 QETH_CARD_TEXT(card, 5, "write");
1117         } else {
1118                 channel = &card->data;
1119                 QETH_CARD_TEXT(card, 5, "data");
1120         }
1121
1122         if (qeth_intparm_is_iob(intparm))
1123                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1124
1125         if (__qeth_check_irb_error(cdev, intparm, irb)) {
1126                 /* IO was terminated, free its resources. */
1127                 if (iob)
1128                         qeth_release_buffer(iob->channel, iob);
1129                 atomic_set(&channel->irq_pending, 0);
1130                 wake_up(&card->wait_q);
1131                 return;
1132         }
1133
1134         atomic_set(&channel->irq_pending, 0);
1135
1136         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1137                 channel->state = CH_STATE_STOPPED;
1138
1139         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1140                 channel->state = CH_STATE_HALTED;
1141
1142         /*let's wake up immediately on data channel*/
1143         if ((channel == &card->data) && (intparm != 0) &&
1144             (intparm != QETH_RCD_PARM))
1145                 goto out;
1146
1147         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1148                 QETH_CARD_TEXT(card, 6, "clrchpar");
1149                 /* we don't have to handle this further */
1150                 intparm = 0;
1151         }
1152         if (intparm == QETH_HALT_CHANNEL_PARM) {
1153                 QETH_CARD_TEXT(card, 6, "hltchpar");
1154                 /* we don't have to handle this further */
1155                 intparm = 0;
1156         }
1157
1158         cstat = irb->scsw.cmd.cstat;
1159         dstat = irb->scsw.cmd.dstat;
1160
1161         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1162             (dstat & DEV_STAT_UNIT_CHECK) ||
1163             (cstat)) {
1164                 if (irb->esw.esw0.erw.cons) {
1165                         dev_warn(&channel->ccwdev->dev,
1166                                 "The qeth device driver failed to recover "
1167                                 "an error on the device\n");
1168                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1169                                 "0x%X dstat 0x%X\n",
1170                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1171                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1172                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1173                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1174                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1175                 }
1176                 if (intparm == QETH_RCD_PARM) {
1177                         channel->state = CH_STATE_DOWN;
1178                         goto out;
1179                 }
1180                 rc = qeth_get_problem(cdev, irb);
1181                 if (rc) {
1182                         card->read_or_write_problem = 1;
1183                         qeth_clear_ipacmd_list(card);
1184                         qeth_schedule_recovery(card);
1185                         goto out;
1186                 }
1187         }
1188
1189         if (intparm == QETH_RCD_PARM) {
1190                 channel->state = CH_STATE_RCD_DONE;
1191                 goto out;
1192         }
1193         if (channel == &card->data)
1194                 return;
1195         if (channel == &card->read &&
1196             channel->state == CH_STATE_UP)
1197                 __qeth_issue_next_read(card);
1198
1199         if (iob && iob->callback)
1200                 iob->callback(iob->channel, iob);
1201
1202 out:
1203         wake_up(&card->wait_q);
1204         return;
1205 }
1206
1207 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1208                 struct qeth_qdio_out_buffer *buf,
1209                 enum iucv_tx_notify notification)
1210 {
1211         struct sk_buff *skb;
1212
1213         if (skb_queue_empty(&buf->skb_list))
1214                 goto out;
1215         skb = skb_peek(&buf->skb_list);
1216         while (skb) {
1217                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1218                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1219                 if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1220                         if (skb->sk) {
1221                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1222                                 iucv->sk_txnotify(skb, notification);
1223                         }
1224                 }
1225                 if (skb_queue_is_last(&buf->skb_list, skb))
1226                         skb = NULL;
1227                 else
1228                         skb = skb_queue_next(&buf->skb_list, skb);
1229         }
1230 out:
1231         return;
1232 }
1233
1234 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1235 {
1236         struct sk_buff *skb;
1237         struct iucv_sock *iucv;
1238         int notify_general_error = 0;
1239
1240         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1241                 notify_general_error = 1;
1242
1243         /* release may never happen from within CQ tasklet scope */
1244         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1245
1246         skb = skb_dequeue(&buf->skb_list);
1247         while (skb) {
1248                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1249                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1250                 if (notify_general_error &&
1251                     be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1252                         if (skb->sk) {
1253                                 iucv = iucv_sk(skb->sk);
1254                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1255                         }
1256                 }
1257                 refcount_dec(&skb->users);
1258                 dev_kfree_skb_any(skb);
1259                 skb = skb_dequeue(&buf->skb_list);
1260         }
1261 }
1262
1263 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1264                 struct qeth_qdio_out_buffer *buf,
1265                 enum qeth_qdio_buffer_states newbufstate)
1266 {
1267         int i;
1268
1269         /* is PCI flag set on buffer? */
1270         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1271                 atomic_dec(&queue->set_pci_flags_count);
1272
1273         if (newbufstate == QETH_QDIO_BUF_EMPTY) {
1274                 qeth_release_skbs(buf);
1275         }
1276         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1277                 if (buf->buffer->element[i].addr && buf->is_header[i])
1278                         kmem_cache_free(qeth_core_header_cache,
1279                                 buf->buffer->element[i].addr);
1280                 buf->is_header[i] = 0;
1281                 buf->buffer->element[i].length = 0;
1282                 buf->buffer->element[i].addr = NULL;
1283                 buf->buffer->element[i].eflags = 0;
1284                 buf->buffer->element[i].sflags = 0;
1285         }
1286         buf->buffer->element[15].eflags = 0;
1287         buf->buffer->element[15].sflags = 0;
1288         buf->next_element_to_fill = 0;
1289         atomic_set(&buf->state, newbufstate);
1290 }
1291
1292 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1293 {
1294         int j;
1295
1296         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1297                 if (!q->bufs[j])
1298                         continue;
1299                 qeth_cleanup_handled_pending(q, j, 1);
1300                 qeth_clear_output_buffer(q, q->bufs[j], QETH_QDIO_BUF_EMPTY);
1301                 if (free) {
1302                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1303                         q->bufs[j] = NULL;
1304                 }
1305         }
1306 }
1307
1308 void qeth_clear_qdio_buffers(struct qeth_card *card)
1309 {
1310         int i;
1311
1312         QETH_CARD_TEXT(card, 2, "clearqdbf");
1313         /* clear outbound buffers to free skbs */
1314         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1315                 if (card->qdio.out_qs[i]) {
1316                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1317                 }
1318         }
1319 }
1320 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1321
1322 static void qeth_free_buffer_pool(struct qeth_card *card)
1323 {
1324         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1325         int i = 0;
1326         list_for_each_entry_safe(pool_entry, tmp,
1327                                  &card->qdio.init_pool.entry_list, init_list){
1328                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1329                         free_page((unsigned long)pool_entry->elements[i]);
1330                 list_del(&pool_entry->init_list);
1331                 kfree(pool_entry);
1332         }
1333 }
1334
1335 static void qeth_clean_channel(struct qeth_channel *channel)
1336 {
1337         int cnt;
1338
1339         QETH_DBF_TEXT(SETUP, 2, "freech");
1340         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1341                 kfree(channel->iob[cnt].data);
1342 }
1343
1344 static void qeth_set_single_write_queues(struct qeth_card *card)
1345 {
1346         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1347             (card->qdio.no_out_queues == 4))
1348                 qeth_free_qdio_buffers(card);
1349
1350         card->qdio.no_out_queues = 1;
1351         if (card->qdio.default_out_queue != 0)
1352                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1353
1354         card->qdio.default_out_queue = 0;
1355 }
1356
1357 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1358 {
1359         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1360             (card->qdio.no_out_queues == 1)) {
1361                 qeth_free_qdio_buffers(card);
1362                 card->qdio.default_out_queue = 2;
1363         }
1364         card->qdio.no_out_queues = 4;
1365 }
1366
1367 static void qeth_update_from_chp_desc(struct qeth_card *card)
1368 {
1369         struct ccw_device *ccwdev;
1370         struct channel_path_desc_fmt0 *chp_dsc;
1371
1372         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1373
1374         ccwdev = card->data.ccwdev;
1375         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1376         if (!chp_dsc)
1377                 goto out;
1378
1379         card->info.func_level = 0x4100 + chp_dsc->desc;
1380         if (card->info.type == QETH_CARD_TYPE_IQD)
1381                 goto out;
1382
1383         /* CHPP field bit 6 == 1 -> single queue */
1384         if ((chp_dsc->chpp & 0x02) == 0x02)
1385                 qeth_set_single_write_queues(card);
1386         else
1387                 qeth_set_multiple_write_queues(card);
1388 out:
1389         kfree(chp_dsc);
1390         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1391         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1392 }
1393
1394 static void qeth_init_qdio_info(struct qeth_card *card)
1395 {
1396         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1397         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1398         /* inbound */
1399         card->qdio.no_in_queues = 1;
1400         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1401         if (card->info.type == QETH_CARD_TYPE_IQD)
1402                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1403         else
1404                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1405         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1406         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1407         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1408 }
1409
1410 static void qeth_set_intial_options(struct qeth_card *card)
1411 {
1412         card->options.route4.type = NO_ROUTER;
1413         card->options.route6.type = NO_ROUTER;
1414         card->options.fake_broadcast = 0;
1415         card->options.performance_stats = 0;
1416         card->options.rx_sg_cb = QETH_RX_SG_CB;
1417         card->options.isolation = ISOLATION_MODE_NONE;
1418         card->options.cq = QETH_CQ_DISABLED;
1419 }
1420
1421 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1422 {
1423         unsigned long flags;
1424         int rc = 0;
1425
1426         spin_lock_irqsave(&card->thread_mask_lock, flags);
1427         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1428                         (u8) card->thread_start_mask,
1429                         (u8) card->thread_allowed_mask,
1430                         (u8) card->thread_running_mask);
1431         rc = (card->thread_start_mask & thread);
1432         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1433         return rc;
1434 }
1435
1436 static void qeth_start_kernel_thread(struct work_struct *work)
1437 {
1438         struct task_struct *ts;
1439         struct qeth_card *card = container_of(work, struct qeth_card,
1440                                         kernel_thread_starter);
1441         QETH_CARD_TEXT(card , 2, "strthrd");
1442
1443         if (card->read.state != CH_STATE_UP &&
1444             card->write.state != CH_STATE_UP)
1445                 return;
1446         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1447                 ts = kthread_run(card->discipline->recover, (void *)card,
1448                                 "qeth_recover");
1449                 if (IS_ERR(ts)) {
1450                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1451                         qeth_clear_thread_running_bit(card,
1452                                 QETH_RECOVER_THREAD);
1453                 }
1454         }
1455 }
1456
1457 static void qeth_buffer_reclaim_work(struct work_struct *);
1458 static int qeth_setup_card(struct qeth_card *card)
1459 {
1460
1461         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1462         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1463
1464         card->read.state  = CH_STATE_DOWN;
1465         card->write.state = CH_STATE_DOWN;
1466         card->data.state  = CH_STATE_DOWN;
1467         card->state = CARD_STATE_DOWN;
1468         card->lan_online = 0;
1469         card->read_or_write_problem = 0;
1470         card->dev = NULL;
1471         spin_lock_init(&card->mclock);
1472         spin_lock_init(&card->lock);
1473         spin_lock_init(&card->ip_lock);
1474         spin_lock_init(&card->thread_mask_lock);
1475         mutex_init(&card->conf_mutex);
1476         mutex_init(&card->discipline_mutex);
1477         mutex_init(&card->vid_list_mutex);
1478         card->thread_start_mask = 0;
1479         card->thread_allowed_mask = 0;
1480         card->thread_running_mask = 0;
1481         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1482         INIT_LIST_HEAD(&card->cmd_waiter_list);
1483         init_waitqueue_head(&card->wait_q);
1484         /* initial options */
1485         qeth_set_intial_options(card);
1486         /* IP address takeover */
1487         INIT_LIST_HEAD(&card->ipato.entries);
1488         card->ipato.enabled = false;
1489         card->ipato.invert4 = false;
1490         card->ipato.invert6 = false;
1491         /* init QDIO stuff */
1492         qeth_init_qdio_info(card);
1493         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1494         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1495         return 0;
1496 }
1497
1498 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1499 {
1500         struct qeth_card *card = container_of(slr, struct qeth_card,
1501                                         qeth_service_level);
1502         if (card->info.mcl_level[0])
1503                 seq_printf(m, "qeth: %s firmware level %s\n",
1504                         CARD_BUS_ID(card), card->info.mcl_level);
1505 }
1506
1507 static struct qeth_card *qeth_alloc_card(void)
1508 {
1509         struct qeth_card *card;
1510
1511         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1512         card = kzalloc(sizeof(struct qeth_card), GFP_DMA|GFP_KERNEL);
1513         if (!card)
1514                 goto out;
1515         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1516         if (qeth_setup_channel(&card->read))
1517                 goto out_ip;
1518         if (qeth_setup_channel(&card->write))
1519                 goto out_channel;
1520         card->options.layer2 = -1;
1521         card->qeth_service_level.seq_print = qeth_core_sl_print;
1522         register_service_level(&card->qeth_service_level);
1523         return card;
1524
1525 out_channel:
1526         qeth_clean_channel(&card->read);
1527 out_ip:
1528         kfree(card);
1529 out:
1530         return NULL;
1531 }
1532
1533 static void qeth_determine_card_type(struct qeth_card *card)
1534 {
1535         QETH_DBF_TEXT(SETUP, 2, "detcdtyp");
1536
1537         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1538         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1539         card->info.type = CARD_RDEV(card)->id.driver_info;
1540         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1541         if (card->info.type == QETH_CARD_TYPE_IQD)
1542                 card->info.is_multicast_different = 0x0103;
1543         qeth_update_from_chp_desc(card);
1544 }
1545
1546 static int qeth_clear_channel(struct qeth_channel *channel)
1547 {
1548         unsigned long flags;
1549         struct qeth_card *card;
1550         int rc;
1551
1552         card = CARD_FROM_CDEV(channel->ccwdev);
1553         QETH_CARD_TEXT(card, 3, "clearch");
1554         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1555         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1556         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1557
1558         if (rc)
1559                 return rc;
1560         rc = wait_event_interruptible_timeout(card->wait_q,
1561                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1562         if (rc == -ERESTARTSYS)
1563                 return rc;
1564         if (channel->state != CH_STATE_STOPPED)
1565                 return -ETIME;
1566         channel->state = CH_STATE_DOWN;
1567         return 0;
1568 }
1569
1570 static int qeth_halt_channel(struct qeth_channel *channel)
1571 {
1572         unsigned long flags;
1573         struct qeth_card *card;
1574         int rc;
1575
1576         card = CARD_FROM_CDEV(channel->ccwdev);
1577         QETH_CARD_TEXT(card, 3, "haltch");
1578         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1579         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1580         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1581
1582         if (rc)
1583                 return rc;
1584         rc = wait_event_interruptible_timeout(card->wait_q,
1585                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1586         if (rc == -ERESTARTSYS)
1587                 return rc;
1588         if (channel->state != CH_STATE_HALTED)
1589                 return -ETIME;
1590         return 0;
1591 }
1592
1593 static int qeth_halt_channels(struct qeth_card *card)
1594 {
1595         int rc1 = 0, rc2 = 0, rc3 = 0;
1596
1597         QETH_CARD_TEXT(card, 3, "haltchs");
1598         rc1 = qeth_halt_channel(&card->read);
1599         rc2 = qeth_halt_channel(&card->write);
1600         rc3 = qeth_halt_channel(&card->data);
1601         if (rc1)
1602                 return rc1;
1603         if (rc2)
1604                 return rc2;
1605         return rc3;
1606 }
1607
1608 static int qeth_clear_channels(struct qeth_card *card)
1609 {
1610         int rc1 = 0, rc2 = 0, rc3 = 0;
1611
1612         QETH_CARD_TEXT(card, 3, "clearchs");
1613         rc1 = qeth_clear_channel(&card->read);
1614         rc2 = qeth_clear_channel(&card->write);
1615         rc3 = qeth_clear_channel(&card->data);
1616         if (rc1)
1617                 return rc1;
1618         if (rc2)
1619                 return rc2;
1620         return rc3;
1621 }
1622
1623 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1624 {
1625         int rc = 0;
1626
1627         QETH_CARD_TEXT(card, 3, "clhacrd");
1628
1629         if (halt)
1630                 rc = qeth_halt_channels(card);
1631         if (rc)
1632                 return rc;
1633         return qeth_clear_channels(card);
1634 }
1635
1636 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1637 {
1638         int rc = 0;
1639
1640         QETH_CARD_TEXT(card, 3, "qdioclr");
1641         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1642                 QETH_QDIO_CLEANING)) {
1643         case QETH_QDIO_ESTABLISHED:
1644                 if (card->info.type == QETH_CARD_TYPE_IQD)
1645                         rc = qdio_shutdown(CARD_DDEV(card),
1646                                 QDIO_FLAG_CLEANUP_USING_HALT);
1647                 else
1648                         rc = qdio_shutdown(CARD_DDEV(card),
1649                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1650                 if (rc)
1651                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1652                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1653                 break;
1654         case QETH_QDIO_CLEANING:
1655                 return rc;
1656         default:
1657                 break;
1658         }
1659         rc = qeth_clear_halt_card(card, use_halt);
1660         if (rc)
1661                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1662         card->state = CARD_STATE_DOWN;
1663         return rc;
1664 }
1665 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1666
1667 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1668                                int *length)
1669 {
1670         struct ciw *ciw;
1671         char *rcd_buf;
1672         int ret;
1673         struct qeth_channel *channel = &card->data;
1674         unsigned long flags;
1675
1676         /*
1677          * scan for RCD command in extended SenseID data
1678          */
1679         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1680         if (!ciw || ciw->cmd == 0)
1681                 return -EOPNOTSUPP;
1682         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1683         if (!rcd_buf)
1684                 return -ENOMEM;
1685
1686         channel->ccw.cmd_code = ciw->cmd;
1687         channel->ccw.cda = (__u32) __pa(rcd_buf);
1688         channel->ccw.count = ciw->count;
1689         channel->ccw.flags = CCW_FLAG_SLI;
1690         channel->state = CH_STATE_RCD;
1691         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1692         ret = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1693                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1694                                        QETH_RCD_TIMEOUT);
1695         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1696         if (!ret)
1697                 wait_event(card->wait_q,
1698                            (channel->state == CH_STATE_RCD_DONE ||
1699                             channel->state == CH_STATE_DOWN));
1700         if (channel->state == CH_STATE_DOWN)
1701                 ret = -EIO;
1702         else
1703                 channel->state = CH_STATE_DOWN;
1704         if (ret) {
1705                 kfree(rcd_buf);
1706                 *buffer = NULL;
1707                 *length = 0;
1708         } else {
1709                 *length = ciw->count;
1710                 *buffer = rcd_buf;
1711         }
1712         return ret;
1713 }
1714
1715 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1716 {
1717         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1718         card->info.chpid = prcd[30];
1719         card->info.unit_addr2 = prcd[31];
1720         card->info.cula = prcd[63];
1721         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1722                                (prcd[0x11] == _ascebc['M']));
1723 }
1724
1725 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1726 {
1727         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1728         struct diag26c_vnic_resp *response = NULL;
1729         struct diag26c_vnic_req *request = NULL;
1730         struct ccw_dev_id id;
1731         char userid[80];
1732         int rc = 0;
1733
1734         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1735
1736         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1737         if (rc)
1738                 goto out;
1739
1740         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1741         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1742         if (!request || !response) {
1743                 rc = -ENOMEM;
1744                 goto out;
1745         }
1746
1747         ccw_device_get_id(CARD_RDEV(card), &id);
1748         request->resp_buf_len = sizeof(*response);
1749         request->resp_version = DIAG26C_VERSION6_VM65918;
1750         request->req_format = DIAG26C_VNIC_INFO;
1751         ASCEBC(userid, 8);
1752         memcpy(&request->sys_name, userid, 8);
1753         request->devno = id.devno;
1754
1755         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1756         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1757         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1758         if (rc)
1759                 goto out;
1760         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1761
1762         if (request->resp_buf_len < sizeof(*response) ||
1763             response->version != request->resp_version) {
1764                 rc = -EIO;
1765                 goto out;
1766         }
1767
1768         if (response->protocol == VNIC_INFO_PROT_L2)
1769                 disc = QETH_DISCIPLINE_LAYER2;
1770         else if (response->protocol == VNIC_INFO_PROT_L3)
1771                 disc = QETH_DISCIPLINE_LAYER3;
1772
1773 out:
1774         kfree(response);
1775         kfree(request);
1776         if (rc)
1777                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1778         return disc;
1779 }
1780
1781 /* Determine whether the device requires a specific layer discipline */
1782 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1783 {
1784         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1785
1786         if (card->info.type == QETH_CARD_TYPE_OSM ||
1787             card->info.type == QETH_CARD_TYPE_OSN)
1788                 disc = QETH_DISCIPLINE_LAYER2;
1789         else if (card->info.guestlan)
1790                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1791                                 QETH_DISCIPLINE_LAYER3 :
1792                                 qeth_vm_detect_layer(card);
1793
1794         switch (disc) {
1795         case QETH_DISCIPLINE_LAYER2:
1796                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1797                 break;
1798         case QETH_DISCIPLINE_LAYER3:
1799                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1800                 break;
1801         default:
1802                 QETH_DBF_TEXT(SETUP, 3, "force no");
1803         }
1804
1805         return disc;
1806 }
1807
1808 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1809 {
1810         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1811
1812         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1813             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1814                 card->info.blkt.time_total = 0;
1815                 card->info.blkt.inter_packet = 0;
1816                 card->info.blkt.inter_packet_jumbo = 0;
1817         } else {
1818                 card->info.blkt.time_total = 250;
1819                 card->info.blkt.inter_packet = 5;
1820                 card->info.blkt.inter_packet_jumbo = 15;
1821         }
1822 }
1823
1824 static void qeth_init_tokens(struct qeth_card *card)
1825 {
1826         card->token.issuer_rm_w = 0x00010103UL;
1827         card->token.cm_filter_w = 0x00010108UL;
1828         card->token.cm_connection_w = 0x0001010aUL;
1829         card->token.ulp_filter_w = 0x0001010bUL;
1830         card->token.ulp_connection_w = 0x0001010dUL;
1831 }
1832
1833 static void qeth_init_func_level(struct qeth_card *card)
1834 {
1835         switch (card->info.type) {
1836         case QETH_CARD_TYPE_IQD:
1837                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1838                 break;
1839         case QETH_CARD_TYPE_OSD:
1840         case QETH_CARD_TYPE_OSN:
1841                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1842                 break;
1843         default:
1844                 break;
1845         }
1846 }
1847
1848 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1849                 void (*idx_reply_cb)(struct qeth_channel *,
1850                         struct qeth_cmd_buffer *))
1851 {
1852         struct qeth_cmd_buffer *iob;
1853         unsigned long flags;
1854         int rc;
1855         struct qeth_card *card;
1856
1857         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1858         card = CARD_FROM_CDEV(channel->ccwdev);
1859         iob = qeth_get_buffer(channel);
1860         if (!iob)
1861                 return -ENOMEM;
1862         iob->callback = idx_reply_cb;
1863         memcpy(&channel->ccw, READ_CCW, sizeof(struct ccw1));
1864         channel->ccw.count = QETH_BUFSIZE;
1865         channel->ccw.cda = (__u32) __pa(iob->data);
1866
1867         wait_event(card->wait_q,
1868                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1869         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1870         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1871         rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1872                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1873         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1874
1875         if (rc) {
1876                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1877                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1878                 atomic_set(&channel->irq_pending, 0);
1879                 wake_up(&card->wait_q);
1880                 return rc;
1881         }
1882         rc = wait_event_interruptible_timeout(card->wait_q,
1883                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1884         if (rc == -ERESTARTSYS)
1885                 return rc;
1886         if (channel->state != CH_STATE_UP) {
1887                 rc = -ETIME;
1888                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1889         } else
1890                 rc = 0;
1891         return rc;
1892 }
1893
1894 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1895                 void (*idx_reply_cb)(struct qeth_channel *,
1896                         struct qeth_cmd_buffer *))
1897 {
1898         struct qeth_card *card;
1899         struct qeth_cmd_buffer *iob;
1900         unsigned long flags;
1901         __u16 temp;
1902         __u8 tmp;
1903         int rc;
1904         struct ccw_dev_id temp_devid;
1905
1906         card = CARD_FROM_CDEV(channel->ccwdev);
1907
1908         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1909
1910         iob = qeth_get_buffer(channel);
1911         if (!iob)
1912                 return -ENOMEM;
1913         iob->callback = idx_reply_cb;
1914         memcpy(&channel->ccw, WRITE_CCW, sizeof(struct ccw1));
1915         channel->ccw.count = IDX_ACTIVATE_SIZE;
1916         channel->ccw.cda = (__u32) __pa(iob->data);
1917         if (channel == &card->write) {
1918                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1919                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1920                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1921                 card->seqno.trans_hdr++;
1922         } else {
1923                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1924                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1925                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1926         }
1927         tmp = ((__u8)card->info.portno) | 0x80;
1928         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1929         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1930                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1931         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1932                &card->info.func_level, sizeof(__u16));
1933         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1934         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1935         temp = (card->info.cula << 8) + card->info.unit_addr2;
1936         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1937
1938         wait_event(card->wait_q,
1939                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1940         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1941         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1942         rc = ccw_device_start_timeout(channel->ccwdev, &channel->ccw,
1943                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1944         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1945
1946         if (rc) {
1947                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1948                         rc);
1949                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1950                 atomic_set(&channel->irq_pending, 0);
1951                 wake_up(&card->wait_q);
1952                 return rc;
1953         }
1954         rc = wait_event_interruptible_timeout(card->wait_q,
1955                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1956         if (rc == -ERESTARTSYS)
1957                 return rc;
1958         if (channel->state != CH_STATE_ACTIVATING) {
1959                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1960                         " failed to recover an error on the device\n");
1961                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1962                         dev_name(&channel->ccwdev->dev));
1963                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1964                 return -ETIME;
1965         }
1966         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1967 }
1968
1969 static int qeth_peer_func_level(int level)
1970 {
1971         if ((level & 0xff) == 8)
1972                 return (level & 0xff) + 0x400;
1973         if (((level >> 8) & 3) == 1)
1974                 return (level & 0xff) + 0x200;
1975         return level;
1976 }
1977
1978 static void qeth_idx_write_cb(struct qeth_channel *channel,
1979                 struct qeth_cmd_buffer *iob)
1980 {
1981         struct qeth_card *card;
1982         __u16 temp;
1983
1984         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1985
1986         if (channel->state == CH_STATE_DOWN) {
1987                 channel->state = CH_STATE_ACTIVATING;
1988                 goto out;
1989         }
1990         card = CARD_FROM_CDEV(channel->ccwdev);
1991
1992         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1993                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1994                         dev_err(&card->write.ccwdev->dev,
1995                                 "The adapter is used exclusively by another "
1996                                 "host\n");
1997                 else
1998                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1999                                 " negative reply\n",
2000                                 dev_name(&card->write.ccwdev->dev));
2001                 goto out;
2002         }
2003         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2004         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
2005                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
2006                         "function level mismatch (sent: 0x%x, received: "
2007                         "0x%x)\n", dev_name(&card->write.ccwdev->dev),
2008                         card->info.func_level, temp);
2009                 goto out;
2010         }
2011         channel->state = CH_STATE_UP;
2012 out:
2013         qeth_release_buffer(channel, iob);
2014 }
2015
2016 static void qeth_idx_read_cb(struct qeth_channel *channel,
2017                 struct qeth_cmd_buffer *iob)
2018 {
2019         struct qeth_card *card;
2020         __u16 temp;
2021
2022         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
2023         if (channel->state == CH_STATE_DOWN) {
2024                 channel->state = CH_STATE_ACTIVATING;
2025                 goto out;
2026         }
2027
2028         card = CARD_FROM_CDEV(channel->ccwdev);
2029         if (qeth_check_idx_response(card, iob->data))
2030                         goto out;
2031
2032         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2033                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2034                 case QETH_IDX_ACT_ERR_EXCL:
2035                         dev_err(&card->write.ccwdev->dev,
2036                                 "The adapter is used exclusively by another "
2037                                 "host\n");
2038                         break;
2039                 case QETH_IDX_ACT_ERR_AUTH:
2040                 case QETH_IDX_ACT_ERR_AUTH_USER:
2041                         dev_err(&card->read.ccwdev->dev,
2042                                 "Setting the device online failed because of "
2043                                 "insufficient authorization\n");
2044                         break;
2045                 default:
2046                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2047                                 " negative reply\n",
2048                                 dev_name(&card->read.ccwdev->dev));
2049                 }
2050                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2051                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2052                 goto out;
2053         }
2054
2055         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2056         if (temp != qeth_peer_func_level(card->info.func_level)) {
2057                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2058                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2059                         dev_name(&card->read.ccwdev->dev),
2060                         card->info.func_level, temp);
2061                 goto out;
2062         }
2063         memcpy(&card->token.issuer_rm_r,
2064                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2065                QETH_MPC_TOKEN_LENGTH);
2066         memcpy(&card->info.mcl_level[0],
2067                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2068         channel->state = CH_STATE_UP;
2069 out:
2070         qeth_release_buffer(channel, iob);
2071 }
2072
2073 void qeth_prepare_control_data(struct qeth_card *card, int len,
2074                 struct qeth_cmd_buffer *iob)
2075 {
2076         qeth_setup_ccw(&card->write, iob->data, len);
2077         iob->callback = qeth_release_buffer;
2078
2079         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2080                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2081         card->seqno.trans_hdr++;
2082         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2083                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2084         card->seqno.pdu_hdr++;
2085         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2086                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2087         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2088 }
2089 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2090
2091 /**
2092  * qeth_send_control_data() -   send control command to the card
2093  * @card:                       qeth_card structure pointer
2094  * @len:                        size of the command buffer
2095  * @iob:                        qeth_cmd_buffer pointer
2096  * @reply_cb:                   callback function pointer
2097  * @cb_card:                    pointer to the qeth_card structure
2098  * @cb_reply:                   pointer to the qeth_reply structure
2099  * @cb_cmd:                     pointer to the original iob for non-IPA
2100  *                              commands, or to the qeth_ipa_cmd structure
2101  *                              for the IPA commands.
2102  * @reply_param:                private pointer passed to the callback
2103  *
2104  * Returns the value of the `return_code' field of the response
2105  * block returned from the hardware, or other error indication.
2106  * Value of zero indicates successful execution of the command.
2107  *
2108  * Callback function gets called one or more times, with cb_cmd
2109  * pointing to the response returned by the hardware. Callback
2110  * function must return non-zero if more reply blocks are expected,
2111  * and zero if the last or only reply block is received. Callback
2112  * function can get the value of the reply_param pointer from the
2113  * field 'param' of the structure qeth_reply.
2114  */
2115
2116 int qeth_send_control_data(struct qeth_card *card, int len,
2117                 struct qeth_cmd_buffer *iob,
2118                 int (*reply_cb)(struct qeth_card *cb_card,
2119                                 struct qeth_reply *cb_reply,
2120                                 unsigned long cb_cmd),
2121                 void *reply_param)
2122 {
2123         int rc;
2124         unsigned long flags;
2125         struct qeth_reply *reply = NULL;
2126         unsigned long timeout, event_timeout;
2127         struct qeth_ipa_cmd *cmd = NULL;
2128
2129         QETH_CARD_TEXT(card, 2, "sendctl");
2130
2131         if (card->read_or_write_problem) {
2132                 qeth_release_buffer(iob->channel, iob);
2133                 return -EIO;
2134         }
2135         reply = qeth_alloc_reply(card);
2136         if (!reply) {
2137                 return -ENOMEM;
2138         }
2139         reply->callback = reply_cb;
2140         reply->param = reply_param;
2141
2142         init_waitqueue_head(&reply->wait_q);
2143
2144         while (atomic_cmpxchg(&card->write.irq_pending, 0, 1)) ;
2145
2146         if (IS_IPA(iob->data)) {
2147                 cmd = __ipa_cmd(iob);
2148                 cmd->hdr.seqno = card->seqno.ipa++;
2149                 reply->seqno = cmd->hdr.seqno;
2150                 event_timeout = QETH_IPA_TIMEOUT;
2151         } else {
2152                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2153                 event_timeout = QETH_TIMEOUT;
2154         }
2155         qeth_prepare_control_data(card, len, iob);
2156
2157         spin_lock_irqsave(&card->lock, flags);
2158         list_add_tail(&reply->list, &card->cmd_waiter_list);
2159         spin_unlock_irqrestore(&card->lock, flags);
2160
2161         timeout = jiffies + event_timeout;
2162
2163         QETH_CARD_TEXT(card, 6, "noirqpnd");
2164         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
2165         rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
2166                                       (addr_t) iob, 0, 0, event_timeout);
2167         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
2168         if (rc) {
2169                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2170                         "ccw_device_start rc = %i\n",
2171                         dev_name(&card->write.ccwdev->dev), rc);
2172                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2173                 spin_lock_irqsave(&card->lock, flags);
2174                 list_del_init(&reply->list);
2175                 qeth_put_reply(reply);
2176                 spin_unlock_irqrestore(&card->lock, flags);
2177                 qeth_release_buffer(iob->channel, iob);
2178                 atomic_set(&card->write.irq_pending, 0);
2179                 wake_up(&card->wait_q);
2180                 return rc;
2181         }
2182
2183         /* we have only one long running ipassist, since we can ensure
2184            process context of this command we can sleep */
2185         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2186             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2187                 if (!wait_event_timeout(reply->wait_q,
2188                     atomic_read(&reply->received), event_timeout))
2189                         goto time_err;
2190         } else {
2191                 while (!atomic_read(&reply->received)) {
2192                         if (time_after(jiffies, timeout))
2193                                 goto time_err;
2194                         cpu_relax();
2195                 }
2196         }
2197
2198         rc = reply->rc;
2199         qeth_put_reply(reply);
2200         return rc;
2201
2202 time_err:
2203         reply->rc = -ETIME;
2204         spin_lock_irqsave(&reply->card->lock, flags);
2205         list_del_init(&reply->list);
2206         spin_unlock_irqrestore(&reply->card->lock, flags);
2207         atomic_inc(&reply->received);
2208         rc = reply->rc;
2209         qeth_put_reply(reply);
2210         return rc;
2211 }
2212 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2213
2214 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2215                 unsigned long data)
2216 {
2217         struct qeth_cmd_buffer *iob;
2218
2219         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2220
2221         iob = (struct qeth_cmd_buffer *) data;
2222         memcpy(&card->token.cm_filter_r,
2223                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2224                QETH_MPC_TOKEN_LENGTH);
2225         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2226         return 0;
2227 }
2228
2229 static int qeth_cm_enable(struct qeth_card *card)
2230 {
2231         int rc;
2232         struct qeth_cmd_buffer *iob;
2233
2234         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2235
2236         iob = qeth_wait_for_buffer(&card->write);
2237         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2238         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2239                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2240         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2241                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2242
2243         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2244                                     qeth_cm_enable_cb, NULL);
2245         return rc;
2246 }
2247
2248 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2249                 unsigned long data)
2250 {
2251
2252         struct qeth_cmd_buffer *iob;
2253
2254         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2255
2256         iob = (struct qeth_cmd_buffer *) data;
2257         memcpy(&card->token.cm_connection_r,
2258                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2259                QETH_MPC_TOKEN_LENGTH);
2260         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2261         return 0;
2262 }
2263
2264 static int qeth_cm_setup(struct qeth_card *card)
2265 {
2266         int rc;
2267         struct qeth_cmd_buffer *iob;
2268
2269         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2270
2271         iob = qeth_wait_for_buffer(&card->write);
2272         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2273         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2274                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2275         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2276                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2277         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2278                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2279         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2280                                     qeth_cm_setup_cb, NULL);
2281         return rc;
2282
2283 }
2284
2285 static int qeth_get_initial_mtu_for_card(struct qeth_card *card)
2286 {
2287         switch (card->info.type) {
2288         case QETH_CARD_TYPE_IQD:
2289                 return card->info.max_mtu;
2290         case QETH_CARD_TYPE_OSD:
2291         case QETH_CARD_TYPE_OSX:
2292                 if (!card->options.layer2)
2293                         return ETH_DATA_LEN - 8; /* L3: allow for LLC + SNAP */
2294                 /* fall through */
2295         default:
2296                 return ETH_DATA_LEN;
2297         }
2298 }
2299
2300 static int qeth_get_mtu_outof_framesize(int framesize)
2301 {
2302         switch (framesize) {
2303         case 0x4000:
2304                 return 8192;
2305         case 0x6000:
2306                 return 16384;
2307         case 0xa000:
2308                 return 32768;
2309         case 0xffff:
2310                 return 57344;
2311         default:
2312                 return 0;
2313         }
2314 }
2315
2316 static int qeth_mtu_is_valid(struct qeth_card *card, int mtu)
2317 {
2318         switch (card->info.type) {
2319         case QETH_CARD_TYPE_OSD:
2320         case QETH_CARD_TYPE_OSM:
2321         case QETH_CARD_TYPE_OSX:
2322         case QETH_CARD_TYPE_IQD:
2323                 return ((mtu >= 576) &&
2324                         (mtu <= card->info.max_mtu));
2325         case QETH_CARD_TYPE_OSN:
2326         default:
2327                 return 1;
2328         }
2329 }
2330
2331 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2332                 unsigned long data)
2333 {
2334
2335         __u16 mtu, framesize;
2336         __u16 len;
2337         __u8 link_type;
2338         struct qeth_cmd_buffer *iob;
2339
2340         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2341
2342         iob = (struct qeth_cmd_buffer *) data;
2343         memcpy(&card->token.ulp_filter_r,
2344                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2345                QETH_MPC_TOKEN_LENGTH);
2346         if (card->info.type == QETH_CARD_TYPE_IQD) {
2347                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2348                 mtu = qeth_get_mtu_outof_framesize(framesize);
2349                 if (!mtu) {
2350                         iob->rc = -EINVAL;
2351                         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2352                         return 0;
2353                 }
2354                 if (card->info.initial_mtu && (card->info.initial_mtu != mtu)) {
2355                         /* frame size has changed */
2356                         if (card->dev &&
2357                             ((card->dev->mtu == card->info.initial_mtu) ||
2358                              (card->dev->mtu > mtu)))
2359                                 card->dev->mtu = mtu;
2360                         qeth_free_qdio_buffers(card);
2361                 }
2362                 card->info.initial_mtu = mtu;
2363                 card->info.max_mtu = mtu;
2364                 card->qdio.in_buf_size = mtu + 2 * PAGE_SIZE;
2365         } else {
2366                 card->info.max_mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(
2367                         iob->data);
2368                 card->info.initial_mtu = min(card->info.max_mtu,
2369                                         qeth_get_initial_mtu_for_card(card));
2370                 card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
2371         }
2372
2373         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2374         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2375                 memcpy(&link_type,
2376                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2377                 card->info.link_type = link_type;
2378         } else
2379                 card->info.link_type = 0;
2380         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2381         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2382         return 0;
2383 }
2384
2385 static int qeth_ulp_enable(struct qeth_card *card)
2386 {
2387         int rc;
2388         char prot_type;
2389         struct qeth_cmd_buffer *iob;
2390
2391         /*FIXME: trace view callbacks*/
2392         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2393
2394         iob = qeth_wait_for_buffer(&card->write);
2395         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2396
2397         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) =
2398                 (__u8) card->info.portno;
2399         if (card->options.layer2)
2400                 if (card->info.type == QETH_CARD_TYPE_OSN)
2401                         prot_type = QETH_PROT_OSN2;
2402                 else
2403                         prot_type = QETH_PROT_LAYER2;
2404         else
2405                 prot_type = QETH_PROT_TCPIP;
2406
2407         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2408         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2409                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2410         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2411                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2412         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2413                                     qeth_ulp_enable_cb, NULL);
2414         return rc;
2415
2416 }
2417
2418 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2419                 unsigned long data)
2420 {
2421         struct qeth_cmd_buffer *iob;
2422
2423         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2424
2425         iob = (struct qeth_cmd_buffer *) data;
2426         memcpy(&card->token.ulp_connection_r,
2427                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2428                QETH_MPC_TOKEN_LENGTH);
2429         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2430                      3)) {
2431                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2432                 dev_err(&card->gdev->dev, "A connection could not be "
2433                         "established because of an OLM limit\n");
2434                 iob->rc = -EMLINK;
2435         }
2436         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2437         return 0;
2438 }
2439
2440 static int qeth_ulp_setup(struct qeth_card *card)
2441 {
2442         int rc;
2443         __u16 temp;
2444         struct qeth_cmd_buffer *iob;
2445         struct ccw_dev_id dev_id;
2446
2447         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2448
2449         iob = qeth_wait_for_buffer(&card->write);
2450         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2451
2452         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2453                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2454         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2455                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2456         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2457                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2458
2459         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2460         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2461         temp = (card->info.cula << 8) + card->info.unit_addr2;
2462         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2463         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2464                                     qeth_ulp_setup_cb, NULL);
2465         return rc;
2466 }
2467
2468 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2469 {
2470         int rc;
2471         struct qeth_qdio_out_buffer *newbuf;
2472
2473         rc = 0;
2474         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2475         if (!newbuf) {
2476                 rc = -ENOMEM;
2477                 goto out;
2478         }
2479         newbuf->buffer = q->qdio_bufs[bidx];
2480         skb_queue_head_init(&newbuf->skb_list);
2481         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2482         newbuf->q = q;
2483         newbuf->aob = NULL;
2484         newbuf->next_pending = q->bufs[bidx];
2485         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2486         q->bufs[bidx] = newbuf;
2487         if (q->bufstates) {
2488                 q->bufstates[bidx].user = newbuf;
2489                 QETH_CARD_TEXT_(q->card, 2, "nbs%d", bidx);
2490                 QETH_CARD_TEXT_(q->card, 2, "%lx", (long) newbuf);
2491                 QETH_CARD_TEXT_(q->card, 2, "%lx",
2492                                 (long) newbuf->next_pending);
2493         }
2494 out:
2495         return rc;
2496 }
2497
2498 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2499 {
2500         if (!q)
2501                 return;
2502
2503         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2504         kfree(q);
2505 }
2506
2507 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2508 {
2509         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2510
2511         if (!q)
2512                 return NULL;
2513
2514         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2515                 kfree(q);
2516                 return NULL;
2517         }
2518         return q;
2519 }
2520
2521 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2522 {
2523         int i, j;
2524
2525         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2526
2527         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2528                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2529                 return 0;
2530
2531         QETH_DBF_TEXT(SETUP, 2, "inq");
2532         card->qdio.in_q = qeth_alloc_qdio_queue();
2533         if (!card->qdio.in_q)
2534                 goto out_nomem;
2535
2536         /* inbound buffer pool */
2537         if (qeth_alloc_buffer_pool(card))
2538                 goto out_freeinq;
2539
2540         /* outbound */
2541         card->qdio.out_qs =
2542                 kcalloc(card->qdio.no_out_queues,
2543                         sizeof(struct qeth_qdio_out_q *),
2544                         GFP_KERNEL);
2545         if (!card->qdio.out_qs)
2546                 goto out_freepool;
2547         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2548                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2549                 if (!card->qdio.out_qs[i])
2550                         goto out_freeoutq;
2551                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2552                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2553                 card->qdio.out_qs[i]->queue_no = i;
2554                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2555                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2556                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2557                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2558                                 goto out_freeoutqbufs;
2559                 }
2560         }
2561
2562         /* completion */
2563         if (qeth_alloc_cq(card))
2564                 goto out_freeoutq;
2565
2566         return 0;
2567
2568 out_freeoutqbufs:
2569         while (j > 0) {
2570                 --j;
2571                 kmem_cache_free(qeth_qdio_outbuf_cache,
2572                                 card->qdio.out_qs[i]->bufs[j]);
2573                 card->qdio.out_qs[i]->bufs[j] = NULL;
2574         }
2575 out_freeoutq:
2576         while (i > 0) {
2577                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2578                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2579         }
2580         kfree(card->qdio.out_qs);
2581         card->qdio.out_qs = NULL;
2582 out_freepool:
2583         qeth_free_buffer_pool(card);
2584 out_freeinq:
2585         qeth_free_qdio_queue(card->qdio.in_q);
2586         card->qdio.in_q = NULL;
2587 out_nomem:
2588         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2589         return -ENOMEM;
2590 }
2591
2592 static void qeth_free_qdio_buffers(struct qeth_card *card)
2593 {
2594         int i, j;
2595
2596         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2597                 QETH_QDIO_UNINITIALIZED)
2598                 return;
2599
2600         qeth_free_cq(card);
2601         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2602         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2603                 if (card->qdio.in_q->bufs[j].rx_skb)
2604                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2605         }
2606         qeth_free_qdio_queue(card->qdio.in_q);
2607         card->qdio.in_q = NULL;
2608         /* inbound buffer pool */
2609         qeth_free_buffer_pool(card);
2610         /* free outbound qdio_qs */
2611         if (card->qdio.out_qs) {
2612                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2613                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2614                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2615                 }
2616                 kfree(card->qdio.out_qs);
2617                 card->qdio.out_qs = NULL;
2618         }
2619 }
2620
2621 static void qeth_create_qib_param_field(struct qeth_card *card,
2622                 char *param_field)
2623 {
2624
2625         param_field[0] = _ascebc['P'];
2626         param_field[1] = _ascebc['C'];
2627         param_field[2] = _ascebc['I'];
2628         param_field[3] = _ascebc['T'];
2629         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2630         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2631         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2632 }
2633
2634 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2635                 char *param_field)
2636 {
2637         param_field[16] = _ascebc['B'];
2638         param_field[17] = _ascebc['L'];
2639         param_field[18] = _ascebc['K'];
2640         param_field[19] = _ascebc['T'];
2641         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2642         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2643         *((unsigned int *) (&param_field[28])) =
2644                 card->info.blkt.inter_packet_jumbo;
2645 }
2646
2647 static int qeth_qdio_activate(struct qeth_card *card)
2648 {
2649         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2650         return qdio_activate(CARD_DDEV(card));
2651 }
2652
2653 static int qeth_dm_act(struct qeth_card *card)
2654 {
2655         int rc;
2656         struct qeth_cmd_buffer *iob;
2657
2658         QETH_DBF_TEXT(SETUP, 2, "dmact");
2659
2660         iob = qeth_wait_for_buffer(&card->write);
2661         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2662
2663         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2664                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2665         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2666                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2667         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2668         return rc;
2669 }
2670
2671 static int qeth_mpc_initialize(struct qeth_card *card)
2672 {
2673         int rc;
2674
2675         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2676
2677         rc = qeth_issue_next_read(card);
2678         if (rc) {
2679                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2680                 return rc;
2681         }
2682         rc = qeth_cm_enable(card);
2683         if (rc) {
2684                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2685                 goto out_qdio;
2686         }
2687         rc = qeth_cm_setup(card);
2688         if (rc) {
2689                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2690                 goto out_qdio;
2691         }
2692         rc = qeth_ulp_enable(card);
2693         if (rc) {
2694                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2695                 goto out_qdio;
2696         }
2697         rc = qeth_ulp_setup(card);
2698         if (rc) {
2699                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2700                 goto out_qdio;
2701         }
2702         rc = qeth_alloc_qdio_buffers(card);
2703         if (rc) {
2704                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2705                 goto out_qdio;
2706         }
2707         rc = qeth_qdio_establish(card);
2708         if (rc) {
2709                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2710                 qeth_free_qdio_buffers(card);
2711                 goto out_qdio;
2712         }
2713         rc = qeth_qdio_activate(card);
2714         if (rc) {
2715                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2716                 goto out_qdio;
2717         }
2718         rc = qeth_dm_act(card);
2719         if (rc) {
2720                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2721                 goto out_qdio;
2722         }
2723
2724         return 0;
2725 out_qdio:
2726         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2727         qdio_free(CARD_DDEV(card));
2728         return rc;
2729 }
2730
2731 void qeth_print_status_message(struct qeth_card *card)
2732 {
2733         switch (card->info.type) {
2734         case QETH_CARD_TYPE_OSD:
2735         case QETH_CARD_TYPE_OSM:
2736         case QETH_CARD_TYPE_OSX:
2737                 /* VM will use a non-zero first character
2738                  * to indicate a HiperSockets like reporting
2739                  * of the level OSA sets the first character to zero
2740                  * */
2741                 if (!card->info.mcl_level[0]) {
2742                         sprintf(card->info.mcl_level, "%02x%02x",
2743                                 card->info.mcl_level[2],
2744                                 card->info.mcl_level[3]);
2745                         break;
2746                 }
2747                 /* fallthrough */
2748         case QETH_CARD_TYPE_IQD:
2749                 if ((card->info.guestlan) ||
2750                     (card->info.mcl_level[0] & 0x80)) {
2751                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2752                                 card->info.mcl_level[0]];
2753                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2754                                 card->info.mcl_level[1]];
2755                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2756                                 card->info.mcl_level[2]];
2757                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2758                                 card->info.mcl_level[3]];
2759                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2760                 }
2761                 break;
2762         default:
2763                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2764         }
2765         dev_info(&card->gdev->dev,
2766                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2767                  qeth_get_cardname(card),
2768                  (card->info.mcl_level[0]) ? " (level: " : "",
2769                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2770                  (card->info.mcl_level[0]) ? ")" : "",
2771                  qeth_get_cardname_short(card));
2772 }
2773 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2774
2775 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2776 {
2777         struct qeth_buffer_pool_entry *entry;
2778
2779         QETH_CARD_TEXT(card, 5, "inwrklst");
2780
2781         list_for_each_entry(entry,
2782                             &card->qdio.init_pool.entry_list, init_list) {
2783                 qeth_put_buffer_pool_entry(card, entry);
2784         }
2785 }
2786
2787 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2788                                         struct qeth_card *card)
2789 {
2790         struct list_head *plh;
2791         struct qeth_buffer_pool_entry *entry;
2792         int i, free;
2793         struct page *page;
2794
2795         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2796                 return NULL;
2797
2798         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2799                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2800                 free = 1;
2801                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2802                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2803                                 free = 0;
2804                                 break;
2805                         }
2806                 }
2807                 if (free) {
2808                         list_del_init(&entry->list);
2809                         return entry;
2810                 }
2811         }
2812
2813         /* no free buffer in pool so take first one and swap pages */
2814         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2815                         struct qeth_buffer_pool_entry, list);
2816         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2817                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2818                         page = alloc_page(GFP_ATOMIC);
2819                         if (!page) {
2820                                 return NULL;
2821                         } else {
2822                                 free_page((unsigned long)entry->elements[i]);
2823                                 entry->elements[i] = page_address(page);
2824                                 if (card->options.performance_stats)
2825                                         card->perf_stats.sg_alloc_page_rx++;
2826                         }
2827                 }
2828         }
2829         list_del_init(&entry->list);
2830         return entry;
2831 }
2832
2833 static int qeth_init_input_buffer(struct qeth_card *card,
2834                 struct qeth_qdio_buffer *buf)
2835 {
2836         struct qeth_buffer_pool_entry *pool_entry;
2837         int i;
2838
2839         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2840                 buf->rx_skb = netdev_alloc_skb(card->dev,
2841                                                QETH_RX_PULL_LEN + ETH_HLEN);
2842                 if (!buf->rx_skb)
2843                         return 1;
2844         }
2845
2846         pool_entry = qeth_find_free_buffer_pool_entry(card);
2847         if (!pool_entry)
2848                 return 1;
2849
2850         /*
2851          * since the buffer is accessed only from the input_tasklet
2852          * there shouldn't be a need to synchronize; also, since we use
2853          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2854          * buffers
2855          */
2856
2857         buf->pool_entry = pool_entry;
2858         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2859                 buf->buffer->element[i].length = PAGE_SIZE;
2860                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2861                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2862                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2863                 else
2864                         buf->buffer->element[i].eflags = 0;
2865                 buf->buffer->element[i].sflags = 0;
2866         }
2867         return 0;
2868 }
2869
2870 int qeth_init_qdio_queues(struct qeth_card *card)
2871 {
2872         int i, j;
2873         int rc;
2874
2875         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2876
2877         /* inbound queue */
2878         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2879         memset(&card->rx, 0, sizeof(struct qeth_rx));
2880         qeth_initialize_working_pool_list(card);
2881         /*give only as many buffers to hardware as we have buffer pool entries*/
2882         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2883                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2884         card->qdio.in_q->next_buf_to_init =
2885                 card->qdio.in_buf_pool.buf_count - 1;
2886         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2887                      card->qdio.in_buf_pool.buf_count - 1);
2888         if (rc) {
2889                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2890                 return rc;
2891         }
2892
2893         /* completion */
2894         rc = qeth_cq_init(card);
2895         if (rc) {
2896                 return rc;
2897         }
2898
2899         /* outbound queue */
2900         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2901                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2902                                    QDIO_MAX_BUFFERS_PER_Q);
2903                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2904                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2905                                         card->qdio.out_qs[i]->bufs[j],
2906                                         QETH_QDIO_BUF_EMPTY);
2907                 }
2908                 card->qdio.out_qs[i]->card = card;
2909                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2910                 card->qdio.out_qs[i]->do_pack = 0;
2911                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2912                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2913                 atomic_set(&card->qdio.out_qs[i]->state,
2914                            QETH_OUT_Q_UNLOCKED);
2915         }
2916         return 0;
2917 }
2918 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2919
2920 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2921 {
2922         switch (link_type) {
2923         case QETH_LINK_TYPE_HSTR:
2924                 return 2;
2925         default:
2926                 return 1;
2927         }
2928 }
2929
2930 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2931                 struct qeth_ipa_cmd *cmd, __u8 command,
2932                 enum qeth_prot_versions prot)
2933 {
2934         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2935         cmd->hdr.command = command;
2936         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2937         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2938         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2939         cmd->hdr.rel_adapter_no = (__u8) card->info.portno;
2940         if (card->options.layer2)
2941                 cmd->hdr.prim_version_no = 2;
2942         else
2943                 cmd->hdr.prim_version_no = 1;
2944         cmd->hdr.param_count = 1;
2945         cmd->hdr.prot_version = prot;
2946         cmd->hdr.ipa_supported = 0;
2947         cmd->hdr.ipa_enabled = 0;
2948 }
2949
2950 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2951                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2952 {
2953         struct qeth_cmd_buffer *iob;
2954
2955         iob = qeth_get_buffer(&card->write);
2956         if (iob) {
2957                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2958         } else {
2959                 dev_warn(&card->gdev->dev,
2960                          "The qeth driver ran out of channel command buffers\n");
2961                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2962                                  dev_name(&card->gdev->dev));
2963         }
2964
2965         return iob;
2966 }
2967 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2968
2969 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2970                 char prot_type)
2971 {
2972         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2973         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2974         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2975                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2976 }
2977 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2978
2979 /**
2980  * qeth_send_ipa_cmd() - send an IPA command
2981  *
2982  * See qeth_send_control_data() for explanation of the arguments.
2983  */
2984
2985 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2986                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2987                         unsigned long),
2988                 void *reply_param)
2989 {
2990         int rc;
2991         char prot_type;
2992
2993         QETH_CARD_TEXT(card, 4, "sendipa");
2994
2995         if (card->options.layer2)
2996                 if (card->info.type == QETH_CARD_TYPE_OSN)
2997                         prot_type = QETH_PROT_OSN2;
2998                 else
2999                         prot_type = QETH_PROT_LAYER2;
3000         else
3001                 prot_type = QETH_PROT_TCPIP;
3002         qeth_prepare_ipa_cmd(card, iob, prot_type);
3003         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
3004                                                 iob, reply_cb, reply_param);
3005         if (rc == -ETIME) {
3006                 qeth_clear_ipacmd_list(card);
3007                 qeth_schedule_recovery(card);
3008         }
3009         return rc;
3010 }
3011 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3012
3013 static int qeth_send_startlan(struct qeth_card *card)
3014 {
3015         int rc;
3016         struct qeth_cmd_buffer *iob;
3017
3018         QETH_DBF_TEXT(SETUP, 2, "strtlan");
3019
3020         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
3021         if (!iob)
3022                 return -ENOMEM;
3023         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
3024         return rc;
3025 }
3026
3027 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3028 {
3029         if (!cmd->hdr.return_code)
3030                 cmd->hdr.return_code =
3031                         cmd->data.setadapterparms.hdr.return_code;
3032         return cmd->hdr.return_code;
3033 }
3034
3035 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3036                 struct qeth_reply *reply, unsigned long data)
3037 {
3038         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3039
3040         QETH_CARD_TEXT(card, 3, "quyadpcb");
3041         if (qeth_setadpparms_inspect_rc(cmd))
3042                 return 0;
3043
3044         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3045                 card->info.link_type =
3046                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3047                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3048         }
3049         card->options.adp.supported_funcs =
3050                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3051         return 0;
3052 }
3053
3054 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3055                 __u32 command, __u32 cmdlen)
3056 {
3057         struct qeth_cmd_buffer *iob;
3058         struct qeth_ipa_cmd *cmd;
3059
3060         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3061                                      QETH_PROT_IPV4);
3062         if (iob) {
3063                 cmd = __ipa_cmd(iob);
3064                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3065                 cmd->data.setadapterparms.hdr.command_code = command;
3066                 cmd->data.setadapterparms.hdr.used_total = 1;
3067                 cmd->data.setadapterparms.hdr.seq_no = 1;
3068         }
3069
3070         return iob;
3071 }
3072
3073 int qeth_query_setadapterparms(struct qeth_card *card)
3074 {
3075         int rc;
3076         struct qeth_cmd_buffer *iob;
3077
3078         QETH_CARD_TEXT(card, 3, "queryadp");
3079         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3080                                    sizeof(struct qeth_ipacmd_setadpparms));
3081         if (!iob)
3082                 return -ENOMEM;
3083         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3084         return rc;
3085 }
3086 EXPORT_SYMBOL_GPL(qeth_query_setadapterparms);
3087
3088 static int qeth_query_ipassists_cb(struct qeth_card *card,
3089                 struct qeth_reply *reply, unsigned long data)
3090 {
3091         struct qeth_ipa_cmd *cmd;
3092
3093         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3094
3095         cmd = (struct qeth_ipa_cmd *) data;
3096
3097         switch (cmd->hdr.return_code) {
3098         case IPA_RC_NOTSUPP:
3099         case IPA_RC_L2_UNSUPPORTED_CMD:
3100                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3101                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3102                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3103                 return -0;
3104         default:
3105                 if (cmd->hdr.return_code) {
3106                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3107                                                 "rc=%d\n",
3108                                                 dev_name(&card->gdev->dev),
3109                                                 cmd->hdr.return_code);
3110                         return 0;
3111                 }
3112         }
3113
3114         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3115                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3116                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3117         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3118                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3119                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3120         } else
3121                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3122                                         "\n", dev_name(&card->gdev->dev));
3123         return 0;
3124 }
3125
3126 int qeth_query_ipassists(struct qeth_card *card, enum qeth_prot_versions prot)
3127 {
3128         int rc;
3129         struct qeth_cmd_buffer *iob;
3130
3131         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3132         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3133         if (!iob)
3134                 return -ENOMEM;
3135         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3136         return rc;
3137 }
3138 EXPORT_SYMBOL_GPL(qeth_query_ipassists);
3139
3140 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3141                                 struct qeth_reply *reply, unsigned long data)
3142 {
3143         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3144         struct qeth_query_switch_attributes *attrs;
3145         struct qeth_switch_info *sw_info;
3146
3147         QETH_CARD_TEXT(card, 2, "qswiatcb");
3148         if (qeth_setadpparms_inspect_rc(cmd))
3149                 return 0;
3150
3151         sw_info = (struct qeth_switch_info *)reply->param;
3152         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3153         sw_info->capabilities = attrs->capabilities;
3154         sw_info->settings = attrs->settings;
3155         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3156                         sw_info->settings);
3157         return 0;
3158 }
3159
3160 int qeth_query_switch_attributes(struct qeth_card *card,
3161                                  struct qeth_switch_info *sw_info)
3162 {
3163         struct qeth_cmd_buffer *iob;
3164
3165         QETH_CARD_TEXT(card, 2, "qswiattr");
3166         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3167                 return -EOPNOTSUPP;
3168         if (!netif_carrier_ok(card->dev))
3169                 return -ENOMEDIUM;
3170         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3171                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3172         if (!iob)
3173                 return -ENOMEM;
3174         return qeth_send_ipa_cmd(card, iob,
3175                                 qeth_query_switch_attributes_cb, sw_info);
3176 }
3177 EXPORT_SYMBOL_GPL(qeth_query_switch_attributes);
3178
3179 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3180                 struct qeth_reply *reply, unsigned long data)
3181 {
3182         struct qeth_ipa_cmd *cmd;
3183         __u16 rc;
3184
3185         cmd = (struct qeth_ipa_cmd *)data;
3186         rc = cmd->hdr.return_code;
3187         if (rc)
3188                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3189         else
3190                 card->info.diagass_support = cmd->data.diagass.ext;
3191         return 0;
3192 }
3193
3194 static int qeth_query_setdiagass(struct qeth_card *card)
3195 {
3196         struct qeth_cmd_buffer *iob;
3197         struct qeth_ipa_cmd    *cmd;
3198
3199         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3200         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3201         if (!iob)
3202                 return -ENOMEM;
3203         cmd = __ipa_cmd(iob);
3204         cmd->data.diagass.subcmd_len = 16;
3205         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3206         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3207 }
3208
3209 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3210 {
3211         unsigned long info = get_zeroed_page(GFP_KERNEL);
3212         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3213         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3214         struct ccw_dev_id ccwid;
3215         int level;
3216
3217         tid->chpid = card->info.chpid;
3218         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3219         tid->ssid = ccwid.ssid;
3220         tid->devno = ccwid.devno;
3221         if (!info)
3222                 return;
3223         level = stsi(NULL, 0, 0, 0);
3224         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3225                 tid->lparnr = info222->lpar_number;
3226         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3227                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3228                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3229         }
3230         free_page(info);
3231         return;
3232 }
3233
3234 static int qeth_hw_trap_cb(struct qeth_card *card,
3235                 struct qeth_reply *reply, unsigned long data)
3236 {
3237         struct qeth_ipa_cmd *cmd;
3238         __u16 rc;
3239
3240         cmd = (struct qeth_ipa_cmd *)data;
3241         rc = cmd->hdr.return_code;
3242         if (rc)
3243                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3244         return 0;
3245 }
3246
3247 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3248 {
3249         struct qeth_cmd_buffer *iob;
3250         struct qeth_ipa_cmd *cmd;
3251
3252         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3253         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3254         if (!iob)
3255                 return -ENOMEM;
3256         cmd = __ipa_cmd(iob);
3257         cmd->data.diagass.subcmd_len = 80;
3258         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3259         cmd->data.diagass.type = 1;
3260         cmd->data.diagass.action = action;
3261         switch (action) {
3262         case QETH_DIAGS_TRAP_ARM:
3263                 cmd->data.diagass.options = 0x0003;
3264                 cmd->data.diagass.ext = 0x00010000 +
3265                         sizeof(struct qeth_trap_id);
3266                 qeth_get_trap_id(card,
3267                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3268                 break;
3269         case QETH_DIAGS_TRAP_DISARM:
3270                 cmd->data.diagass.options = 0x0001;
3271                 break;
3272         case QETH_DIAGS_TRAP_CAPTURE:
3273                 break;
3274         }
3275         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3276 }
3277 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3278
3279 static int qeth_check_qdio_errors(struct qeth_card *card,
3280                                   struct qdio_buffer *buf,
3281                                   unsigned int qdio_error,
3282                                   const char *dbftext)
3283 {
3284         if (qdio_error) {
3285                 QETH_CARD_TEXT(card, 2, dbftext);
3286                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3287                                buf->element[15].sflags);
3288                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3289                                buf->element[14].sflags);
3290                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3291                 if ((buf->element[15].sflags) == 0x12) {
3292                         card->stats.rx_dropped++;
3293                         return 0;
3294                 } else
3295                         return 1;
3296         }
3297         return 0;
3298 }
3299
3300 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3301 {
3302         struct qeth_qdio_q *queue = card->qdio.in_q;
3303         struct list_head *lh;
3304         int count;
3305         int i;
3306         int rc;
3307         int newcount = 0;
3308
3309         count = (index < queue->next_buf_to_init)?
3310                 card->qdio.in_buf_pool.buf_count -
3311                 (queue->next_buf_to_init - index) :
3312                 card->qdio.in_buf_pool.buf_count -
3313                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3314         /* only requeue at a certain threshold to avoid SIGAs */
3315         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3316                 for (i = queue->next_buf_to_init;
3317                      i < queue->next_buf_to_init + count; ++i) {
3318                         if (qeth_init_input_buffer(card,
3319                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3320                                 break;
3321                         } else {
3322                                 newcount++;
3323                         }
3324                 }
3325
3326                 if (newcount < count) {
3327                         /* we are in memory shortage so we switch back to
3328                            traditional skb allocation and drop packages */
3329                         atomic_set(&card->force_alloc_skb, 3);
3330                         count = newcount;
3331                 } else {
3332                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3333                 }
3334
3335                 if (!count) {
3336                         i = 0;
3337                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3338                                 i++;
3339                         if (i == card->qdio.in_buf_pool.buf_count) {
3340                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3341                                 card->reclaim_index = index;
3342                                 schedule_delayed_work(
3343                                         &card->buffer_reclaim_work,
3344                                         QETH_RECLAIM_WORK_TIME);
3345                         }
3346                         return;
3347                 }
3348
3349                 /*
3350                  * according to old code it should be avoided to requeue all
3351                  * 128 buffers in order to benefit from PCI avoidance.
3352                  * this function keeps at least one buffer (the buffer at
3353                  * 'index') un-requeued -> this buffer is the first buffer that
3354                  * will be requeued the next time
3355                  */
3356                 if (card->options.performance_stats) {
3357                         card->perf_stats.inbound_do_qdio_cnt++;
3358                         card->perf_stats.inbound_do_qdio_start_time =
3359                                 qeth_get_micros();
3360                 }
3361                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3362                              queue->next_buf_to_init, count);
3363                 if (card->options.performance_stats)
3364                         card->perf_stats.inbound_do_qdio_time +=
3365                                 qeth_get_micros() -
3366                                 card->perf_stats.inbound_do_qdio_start_time;
3367                 if (rc) {
3368                         QETH_CARD_TEXT(card, 2, "qinberr");
3369                 }
3370                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3371                                           QDIO_MAX_BUFFERS_PER_Q;
3372         }
3373 }
3374
3375 static void qeth_buffer_reclaim_work(struct work_struct *work)
3376 {
3377         struct qeth_card *card = container_of(work, struct qeth_card,
3378                 buffer_reclaim_work.work);
3379
3380         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3381         qeth_queue_input_buffer(card, card->reclaim_index);
3382 }
3383
3384 static void qeth_handle_send_error(struct qeth_card *card,
3385                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3386 {
3387         int sbalf15 = buffer->buffer->element[15].sflags;
3388
3389         QETH_CARD_TEXT(card, 6, "hdsnderr");
3390         if (card->info.type == QETH_CARD_TYPE_IQD) {
3391                 if (sbalf15 == 0) {
3392                         qdio_err = 0;
3393                 } else {
3394                         qdio_err = 1;
3395                 }
3396         }
3397         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3398
3399         if (!qdio_err)
3400                 return;
3401
3402         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3403                 return;
3404
3405         QETH_CARD_TEXT(card, 1, "lnkfail");
3406         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3407                        (u16)qdio_err, (u8)sbalf15);
3408 }
3409
3410 /**
3411  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3412  * @queue: queue to check for packing buffer
3413  *
3414  * Returns number of buffers that were prepared for flush.
3415  */
3416 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3417 {
3418         struct qeth_qdio_out_buffer *buffer;
3419
3420         buffer = queue->bufs[queue->next_buf_to_fill];
3421         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3422             (buffer->next_element_to_fill > 0)) {
3423                 /* it's a packing buffer */
3424                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3425                 queue->next_buf_to_fill =
3426                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3427                 return 1;
3428         }
3429         return 0;
3430 }
3431
3432 /*
3433  * Switched to packing state if the number of used buffers on a queue
3434  * reaches a certain limit.
3435  */
3436 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3437 {
3438         if (!queue->do_pack) {
3439                 if (atomic_read(&queue->used_buffers)
3440                     >= QETH_HIGH_WATERMARK_PACK){
3441                         /* switch non-PACKING -> PACKING */
3442                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3443                         if (queue->card->options.performance_stats)
3444                                 queue->card->perf_stats.sc_dp_p++;
3445                         queue->do_pack = 1;
3446                 }
3447         }
3448 }
3449
3450 /*
3451  * Switches from packing to non-packing mode. If there is a packing
3452  * buffer on the queue this buffer will be prepared to be flushed.
3453  * In that case 1 is returned to inform the caller. If no buffer
3454  * has to be flushed, zero is returned.
3455  */
3456 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3457 {
3458         if (queue->do_pack) {
3459                 if (atomic_read(&queue->used_buffers)
3460                     <= QETH_LOW_WATERMARK_PACK) {
3461                         /* switch PACKING -> non-PACKING */
3462                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3463                         if (queue->card->options.performance_stats)
3464                                 queue->card->perf_stats.sc_p_dp++;
3465                         queue->do_pack = 0;
3466                         return qeth_prep_flush_pack_buffer(queue);
3467                 }
3468         }
3469         return 0;
3470 }
3471
3472 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3473                                int count)
3474 {
3475         struct qeth_qdio_out_buffer *buf;
3476         int rc;
3477         int i;
3478         unsigned int qdio_flags;
3479
3480         for (i = index; i < index + count; ++i) {
3481                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3482                 buf = queue->bufs[bidx];
3483                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3484                                 SBAL_EFLAGS_LAST_ENTRY;
3485
3486                 if (queue->bufstates)
3487                         queue->bufstates[bidx].user = buf;
3488
3489                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3490                         continue;
3491
3492                 if (!queue->do_pack) {
3493                         if ((atomic_read(&queue->used_buffers) >=
3494                                 (QETH_HIGH_WATERMARK_PACK -
3495                                  QETH_WATERMARK_PACK_FUZZ)) &&
3496                             !atomic_read(&queue->set_pci_flags_count)) {
3497                                 /* it's likely that we'll go to packing
3498                                  * mode soon */
3499                                 atomic_inc(&queue->set_pci_flags_count);
3500                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3501                         }
3502                 } else {
3503                         if (!atomic_read(&queue->set_pci_flags_count)) {
3504                                 /*
3505                                  * there's no outstanding PCI any more, so we
3506                                  * have to request a PCI to be sure the the PCI
3507                                  * will wake at some time in the future then we
3508                                  * can flush packed buffers that might still be
3509                                  * hanging around, which can happen if no
3510                                  * further send was requested by the stack
3511                                  */
3512                                 atomic_inc(&queue->set_pci_flags_count);
3513                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3514                         }
3515                 }
3516         }
3517
3518         netif_trans_update(queue->card->dev);
3519         if (queue->card->options.performance_stats) {
3520                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3521                 queue->card->perf_stats.outbound_do_qdio_start_time =
3522                         qeth_get_micros();
3523         }
3524         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3525         if (atomic_read(&queue->set_pci_flags_count))
3526                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3527         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3528                      queue->queue_no, index, count);
3529         if (queue->card->options.performance_stats)
3530                 queue->card->perf_stats.outbound_do_qdio_time +=
3531                         qeth_get_micros() -
3532                         queue->card->perf_stats.outbound_do_qdio_start_time;
3533         atomic_add(count, &queue->used_buffers);
3534         if (rc) {
3535                 queue->card->stats.tx_errors += count;
3536                 /* ignore temporary SIGA errors without busy condition */
3537                 if (rc == -ENOBUFS)
3538                         return;
3539                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3540                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3541                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3542                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3543                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3544
3545                 /* this must not happen under normal circumstances. if it
3546                  * happens something is really wrong -> recover */
3547                 qeth_schedule_recovery(queue->card);
3548                 return;
3549         }
3550         if (queue->card->options.performance_stats)
3551                 queue->card->perf_stats.bufs_sent += count;
3552 }
3553
3554 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3555 {
3556         int index;
3557         int flush_cnt = 0;
3558         int q_was_packing = 0;
3559
3560         /*
3561          * check if weed have to switch to non-packing mode or if
3562          * we have to get a pci flag out on the queue
3563          */
3564         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3565             !atomic_read(&queue->set_pci_flags_count)) {
3566                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3567                                 QETH_OUT_Q_UNLOCKED) {
3568                         /*
3569                          * If we get in here, there was no action in
3570                          * do_send_packet. So, we check if there is a
3571                          * packing buffer to be flushed here.
3572                          */
3573                         netif_stop_queue(queue->card->dev);
3574                         index = queue->next_buf_to_fill;
3575                         q_was_packing = queue->do_pack;
3576                         /* queue->do_pack may change */
3577                         barrier();
3578                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3579                         if (!flush_cnt &&
3580                             !atomic_read(&queue->set_pci_flags_count))
3581                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3582                         if (queue->card->options.performance_stats &&
3583                             q_was_packing)
3584                                 queue->card->perf_stats.bufs_sent_pack +=
3585                                         flush_cnt;
3586                         if (flush_cnt)
3587                                 qeth_flush_buffers(queue, index, flush_cnt);
3588                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3589                 }
3590         }
3591 }
3592
3593 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3594                                  unsigned long card_ptr)
3595 {
3596         struct qeth_card *card = (struct qeth_card *)card_ptr;
3597
3598         if (card->dev && (card->dev->flags & IFF_UP))
3599                 napi_schedule(&card->napi);
3600 }
3601
3602 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3603 {
3604         int rc;
3605
3606         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3607                 rc = -1;
3608                 goto out;
3609         } else {
3610                 if (card->options.cq == cq) {
3611                         rc = 0;
3612                         goto out;
3613                 }
3614
3615                 if (card->state != CARD_STATE_DOWN &&
3616                     card->state != CARD_STATE_RECOVER) {
3617                         rc = -1;
3618                         goto out;
3619                 }
3620
3621                 qeth_free_qdio_buffers(card);
3622                 card->options.cq = cq;
3623                 rc = 0;
3624         }
3625 out:
3626         return rc;
3627
3628 }
3629 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3630
3631
3632 static void qeth_qdio_cq_handler(struct qeth_card *card,
3633                 unsigned int qdio_err,
3634                 unsigned int queue, int first_element, int count) {
3635         struct qeth_qdio_q *cq = card->qdio.c_q;
3636         int i;
3637         int rc;
3638
3639         if (!qeth_is_cq(card, queue))
3640                 goto out;
3641
3642         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3643         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3644         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3645
3646         if (qdio_err) {
3647                 netif_stop_queue(card->dev);
3648                 qeth_schedule_recovery(card);
3649                 goto out;
3650         }
3651
3652         if (card->options.performance_stats) {
3653                 card->perf_stats.cq_cnt++;
3654                 card->perf_stats.cq_start_time = qeth_get_micros();
3655         }
3656
3657         for (i = first_element; i < first_element + count; ++i) {
3658                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3659                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3660                 int e;
3661
3662                 e = 0;
3663                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3664                        buffer->element[e].addr) {
3665                         unsigned long phys_aob_addr;
3666
3667                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3668                         qeth_qdio_handle_aob(card, phys_aob_addr);
3669                         buffer->element[e].addr = NULL;
3670                         buffer->element[e].eflags = 0;
3671                         buffer->element[e].sflags = 0;
3672                         buffer->element[e].length = 0;
3673
3674                         ++e;
3675                 }
3676
3677                 buffer->element[15].eflags = 0;
3678                 buffer->element[15].sflags = 0;
3679         }
3680         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3681                     card->qdio.c_q->next_buf_to_init,
3682                     count);
3683         if (rc) {
3684                 dev_warn(&card->gdev->dev,
3685                         "QDIO reported an error, rc=%i\n", rc);
3686                 QETH_CARD_TEXT(card, 2, "qcqherr");
3687         }
3688         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3689                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3690
3691         netif_wake_queue(card->dev);
3692
3693         if (card->options.performance_stats) {
3694                 int delta_t = qeth_get_micros();
3695                 delta_t -= card->perf_stats.cq_start_time;
3696                 card->perf_stats.cq_time += delta_t;
3697         }
3698 out:
3699         return;
3700 }
3701
3702 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3703                                     unsigned int qdio_err, int queue,
3704                                     int first_elem, int count,
3705                                     unsigned long card_ptr)
3706 {
3707         struct qeth_card *card = (struct qeth_card *)card_ptr;
3708
3709         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3710         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3711
3712         if (qeth_is_cq(card, queue))
3713                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3714         else if (qdio_err)
3715                 qeth_schedule_recovery(card);
3716 }
3717
3718 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3719                                      unsigned int qdio_error, int __queue,
3720                                      int first_element, int count,
3721                                      unsigned long card_ptr)
3722 {
3723         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3724         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3725         struct qeth_qdio_out_buffer *buffer;
3726         int i;
3727
3728         QETH_CARD_TEXT(card, 6, "qdouhdl");
3729         if (qdio_error & QDIO_ERROR_FATAL) {
3730                 QETH_CARD_TEXT(card, 2, "achkcond");
3731                 netif_stop_queue(card->dev);
3732                 qeth_schedule_recovery(card);
3733                 return;
3734         }
3735         if (card->options.performance_stats) {
3736                 card->perf_stats.outbound_handler_cnt++;
3737                 card->perf_stats.outbound_handler_start_time =
3738                         qeth_get_micros();
3739         }
3740         for (i = first_element; i < (first_element + count); ++i) {
3741                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3742                 buffer = queue->bufs[bidx];
3743                 qeth_handle_send_error(card, buffer, qdio_error);
3744
3745                 if (queue->bufstates &&
3746                     (queue->bufstates[bidx].flags &
3747                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3748                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3749
3750                         if (atomic_cmpxchg(&buffer->state,
3751                                            QETH_QDIO_BUF_PRIMED,
3752                                            QETH_QDIO_BUF_PENDING) ==
3753                                 QETH_QDIO_BUF_PRIMED) {
3754                                 qeth_notify_skbs(queue, buffer,
3755                                                  TX_NOTIFY_PENDING);
3756                         }
3757                         buffer->aob = queue->bufstates[bidx].aob;
3758                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3759                         QETH_CARD_TEXT(queue->card, 5, "aob");
3760                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
3761                                         virt_to_phys(buffer->aob));
3762                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3763                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3764                                 qeth_schedule_recovery(card);
3765                         }
3766                 } else {
3767                         if (card->options.cq == QETH_CQ_ENABLED) {
3768                                 enum iucv_tx_notify n;
3769
3770                                 n = qeth_compute_cq_notification(
3771                                         buffer->buffer->element[15].sflags, 0);
3772                                 qeth_notify_skbs(queue, buffer, n);
3773                         }
3774
3775                         qeth_clear_output_buffer(queue, buffer,
3776                                                 QETH_QDIO_BUF_EMPTY);
3777                 }
3778                 qeth_cleanup_handled_pending(queue, bidx, 0);
3779         }
3780         atomic_sub(count, &queue->used_buffers);
3781         /* check if we need to do something on this outbound queue */
3782         if (card->info.type != QETH_CARD_TYPE_IQD)
3783                 qeth_check_outbound_queue(queue);
3784
3785         netif_wake_queue(queue->card->dev);
3786         if (card->options.performance_stats)
3787                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3788                         card->perf_stats.outbound_handler_start_time;
3789 }
3790
3791 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3792 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3793 {
3794         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3795                 return 2;
3796         return queue_num;
3797 }
3798
3799 /**
3800  * Note: Function assumes that we have 4 outbound queues.
3801  */
3802 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3803                         int ipv, int cast_type)
3804 {
3805         __be16 *tci;
3806         u8 tos;
3807
3808         if (cast_type && card->info.is_multicast_different)
3809                 return card->info.is_multicast_different &
3810                         (card->qdio.no_out_queues - 1);
3811
3812         switch (card->qdio.do_prio_queueing) {
3813         case QETH_PRIO_Q_ING_TOS:
3814         case QETH_PRIO_Q_ING_PREC:
3815                 switch (ipv) {
3816                 case 4:
3817                         tos = ipv4_get_dsfield(ip_hdr(skb));
3818                         break;
3819                 case 6:
3820                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3821                         break;
3822                 default:
3823                         return card->qdio.default_out_queue;
3824                 }
3825                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3826                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3827                 if (tos & IPTOS_MINCOST)
3828                         return qeth_cut_iqd_prio(card, 3);
3829                 if (tos & IPTOS_RELIABILITY)
3830                         return 2;
3831                 if (tos & IPTOS_THROUGHPUT)
3832                         return 1;
3833                 if (tos & IPTOS_LOWDELAY)
3834                         return 0;
3835                 break;
3836         case QETH_PRIO_Q_ING_SKB:
3837                 if (skb->priority > 5)
3838                         return 0;
3839                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3840         case QETH_PRIO_Q_ING_VLAN:
3841                 tci = &((struct ethhdr *)skb->data)->h_proto;
3842                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3843                         return qeth_cut_iqd_prio(card,
3844                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3845                 break;
3846         default:
3847                 break;
3848         }
3849         return card->qdio.default_out_queue;
3850 }
3851 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3852
3853 /**
3854  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3855  * @skb:                                SKB address
3856  *
3857  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3858  * fragmented part of the SKB. Returns zero for linear SKB.
3859  */
3860 int qeth_get_elements_for_frags(struct sk_buff *skb)
3861 {
3862         int cnt, elements = 0;
3863
3864         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3865                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3866
3867                 elements += qeth_get_elements_for_range(
3868                         (addr_t)skb_frag_address(frag),
3869                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3870         }
3871         return elements;
3872 }
3873 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3874
3875 /**
3876  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3877  * @card:                       qeth card structure, to check max. elems.
3878  * @skb:                        SKB address
3879  * @extra_elems:                extra elems needed, to check against max.
3880  * @data_offset:                range starts at skb->data + data_offset
3881  *
3882  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3883  * skb data, including linear part and fragments. Checks if the result plus
3884  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3885  * Note: extra_elems is not included in the returned result.
3886  */
3887 int qeth_get_elements_no(struct qeth_card *card,
3888                      struct sk_buff *skb, int extra_elems, int data_offset)
3889 {
3890         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3891         int elements = qeth_get_elements_for_frags(skb);
3892         addr_t start = (addr_t)skb->data + data_offset;
3893
3894         if (start != end)
3895                 elements += qeth_get_elements_for_range(start, end);
3896
3897         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3898                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3899                         "(Number=%d / Length=%d). Discarded.\n",
3900                         elements + extra_elems, skb->len);
3901                 return 0;
3902         }
3903         return elements;
3904 }
3905 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3906
3907 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3908 {
3909         int hroom, inpage, rest;
3910
3911         if (((unsigned long)skb->data & PAGE_MASK) !=
3912             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3913                 hroom = skb_headroom(skb);
3914                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3915                 rest = len - inpage;
3916                 if (rest > hroom)
3917                         return 1;
3918                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3919                 skb->data -= rest;
3920                 skb->tail -= rest;
3921                 *hdr = (struct qeth_hdr *)skb->data;
3922                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3923         }
3924         return 0;
3925 }
3926 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3927
3928 /**
3929  * qeth_push_hdr() - push a qeth_hdr onto an skb.
3930  * @skb: skb that the qeth_hdr should be pushed onto.
3931  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3932  *       it contains a valid pointer to a qeth_hdr.
3933  * @len: length of the hdr that needs to be pushed on.
3934  *
3935  * Returns the pushed length. If the header can't be pushed on
3936  * (eg. because it would cross a page boundary), it is allocated from
3937  * the cache instead and 0 is returned.
3938  * Error to create the hdr is indicated by returning with < 0.
3939  */
3940 int qeth_push_hdr(struct sk_buff *skb, struct qeth_hdr **hdr, unsigned int len)
3941 {
3942         if (skb_headroom(skb) >= len &&
3943             qeth_get_elements_for_range((addr_t)skb->data - len,
3944                                         (addr_t)skb->data) == 1) {
3945                 *hdr = skb_push(skb, len);
3946                 return len;
3947         }
3948         /* fall back */
3949         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3950         if (!*hdr)
3951                 return -ENOMEM;
3952         return 0;
3953 }
3954 EXPORT_SYMBOL_GPL(qeth_push_hdr);
3955
3956 static void __qeth_fill_buffer(struct sk_buff *skb,
3957                                struct qeth_qdio_out_buffer *buf,
3958                                bool is_first_elem, unsigned int offset)
3959 {
3960         struct qdio_buffer *buffer = buf->buffer;
3961         int element = buf->next_element_to_fill;
3962         int length = skb_headlen(skb) - offset;
3963         char *data = skb->data + offset;
3964         int length_here, cnt;
3965
3966         /* map linear part into buffer element(s) */
3967         while (length > 0) {
3968                 /* length_here is the remaining amount of data in this page */
3969                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3970                 if (length < length_here)
3971                         length_here = length;
3972
3973                 buffer->element[element].addr = data;
3974                 buffer->element[element].length = length_here;
3975                 length -= length_here;
3976                 if (is_first_elem) {
3977                         is_first_elem = false;
3978                         if (length || skb_is_nonlinear(skb))
3979                                 /* skb needs additional elements */
3980                                 buffer->element[element].eflags =
3981                                         SBAL_EFLAGS_FIRST_FRAG;
3982                         else
3983                                 buffer->element[element].eflags = 0;
3984                 } else {
3985                         buffer->element[element].eflags =
3986                                 SBAL_EFLAGS_MIDDLE_FRAG;
3987                 }
3988                 data += length_here;
3989                 element++;
3990         }
3991
3992         /* map page frags into buffer element(s) */
3993         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3994                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3995
3996                 data = skb_frag_address(frag);
3997                 length = skb_frag_size(frag);
3998                 while (length > 0) {
3999                         length_here = PAGE_SIZE -
4000                                 ((unsigned long) data % PAGE_SIZE);
4001                         if (length < length_here)
4002                                 length_here = length;
4003
4004                         buffer->element[element].addr = data;
4005                         buffer->element[element].length = length_here;
4006                         buffer->element[element].eflags =
4007                                 SBAL_EFLAGS_MIDDLE_FRAG;
4008                         length -= length_here;
4009                         data += length_here;
4010                         element++;
4011                 }
4012         }
4013
4014         if (buffer->element[element - 1].eflags)
4015                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4016         buf->next_element_to_fill = element;
4017 }
4018
4019 /**
4020  * qeth_fill_buffer() - map skb into an output buffer
4021  * @queue:      QDIO queue to submit the buffer on
4022  * @buf:        buffer to transport the skb
4023  * @skb:        skb to map into the buffer
4024  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4025  *              from qeth_core_header_cache.
4026  * @offset:     when mapping the skb, start at skb->data + offset
4027  * @hd_len:     if > 0, build a dedicated header element of this size
4028  */
4029 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4030                             struct qeth_qdio_out_buffer *buf,
4031                             struct sk_buff *skb, struct qeth_hdr *hdr,
4032                             unsigned int offset, unsigned int hd_len)
4033 {
4034         struct qdio_buffer *buffer = buf->buffer;
4035         bool is_first_elem = true;
4036         int flush_cnt = 0;
4037
4038         refcount_inc(&skb->users);
4039         skb_queue_tail(&buf->skb_list, skb);
4040
4041         /* build dedicated header element */
4042         if (hd_len) {
4043                 int element = buf->next_element_to_fill;
4044                 is_first_elem = false;
4045
4046                 buffer->element[element].addr = hdr;
4047                 buffer->element[element].length = hd_len;
4048                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4049                 /* remember to free cache-allocated qeth_hdr: */
4050                 buf->is_header[element] = ((void *)hdr != skb->data);
4051                 buf->next_element_to_fill++;
4052         }
4053
4054         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4055
4056         if (!queue->do_pack) {
4057                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4058                 /* set state to PRIMED -> will be flushed */
4059                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4060                 flush_cnt = 1;
4061         } else {
4062                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4063                 if (queue->card->options.performance_stats)
4064                         queue->card->perf_stats.skbs_sent_pack++;
4065                 if (buf->next_element_to_fill >=
4066                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4067                         /*
4068                          * packed buffer if full -> set state PRIMED
4069                          * -> will be flushed
4070                          */
4071                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4072                         flush_cnt = 1;
4073                 }
4074         }
4075         return flush_cnt;
4076 }
4077
4078 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4079                              struct qeth_hdr *hdr, unsigned int offset,
4080                              unsigned int hd_len)
4081 {
4082         int index = queue->next_buf_to_fill;
4083         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
4084
4085         /*
4086          * check if buffer is empty to make sure that we do not 'overtake'
4087          * ourselves and try to fill a buffer that is already primed
4088          */
4089         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4090                 return -EBUSY;
4091         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
4092         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4093         qeth_flush_buffers(queue, index, 1);
4094         return 0;
4095 }
4096 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4097
4098 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4099                         struct sk_buff *skb, struct qeth_hdr *hdr,
4100                         unsigned int offset, unsigned int hd_len,
4101                         int elements_needed)
4102 {
4103         struct qeth_qdio_out_buffer *buffer;
4104         int start_index;
4105         int flush_count = 0;
4106         int do_pack = 0;
4107         int tmp;
4108         int rc = 0;
4109
4110         /* spin until we get the queue ... */
4111         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4112                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4113         start_index = queue->next_buf_to_fill;
4114         buffer = queue->bufs[queue->next_buf_to_fill];
4115         /*
4116          * check if buffer is empty to make sure that we do not 'overtake'
4117          * ourselves and try to fill a buffer that is already primed
4118          */
4119         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4120                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4121                 return -EBUSY;
4122         }
4123         /* check if we need to switch packing state of this queue */
4124         qeth_switch_to_packing_if_needed(queue);
4125         if (queue->do_pack) {
4126                 do_pack = 1;
4127                 /* does packet fit in current buffer? */
4128                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4129                     buffer->next_element_to_fill) < elements_needed) {
4130                         /* ... no -> set state PRIMED */
4131                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4132                         flush_count++;
4133                         queue->next_buf_to_fill =
4134                                 (queue->next_buf_to_fill + 1) %
4135                                 QDIO_MAX_BUFFERS_PER_Q;
4136                         buffer = queue->bufs[queue->next_buf_to_fill];
4137                         /* we did a step forward, so check buffer state
4138                          * again */
4139                         if (atomic_read(&buffer->state) !=
4140                             QETH_QDIO_BUF_EMPTY) {
4141                                 qeth_flush_buffers(queue, start_index,
4142                                                            flush_count);
4143                                 atomic_set(&queue->state,
4144                                                 QETH_OUT_Q_UNLOCKED);
4145                                 rc = -EBUSY;
4146                                 goto out;
4147                         }
4148                 }
4149         }
4150         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4151         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4152                                   QDIO_MAX_BUFFERS_PER_Q;
4153         flush_count += tmp;
4154         if (flush_count)
4155                 qeth_flush_buffers(queue, start_index, flush_count);
4156         else if (!atomic_read(&queue->set_pci_flags_count))
4157                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4158         /*
4159          * queue->state will go from LOCKED -> UNLOCKED or from
4160          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4161          * (switch packing state or flush buffer to get another pci flag out).
4162          * In that case we will enter this loop
4163          */
4164         while (atomic_dec_return(&queue->state)) {
4165                 start_index = queue->next_buf_to_fill;
4166                 /* check if we can go back to non-packing state */
4167                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4168                 /*
4169                  * check if we need to flush a packing buffer to get a pci
4170                  * flag out on the queue
4171                  */
4172                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4173                         tmp = qeth_prep_flush_pack_buffer(queue);
4174                 if (tmp) {
4175                         qeth_flush_buffers(queue, start_index, tmp);
4176                         flush_count += tmp;
4177                 }
4178         }
4179 out:
4180         /* at this point the queue is UNLOCKED again */
4181         if (queue->card->options.performance_stats && do_pack)
4182                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4183
4184         return rc;
4185 }
4186 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4187
4188 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4189                 struct qeth_reply *reply, unsigned long data)
4190 {
4191         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4192         struct qeth_ipacmd_setadpparms *setparms;
4193
4194         QETH_CARD_TEXT(card, 4, "prmadpcb");
4195
4196         setparms = &(cmd->data.setadapterparms);
4197         if (qeth_setadpparms_inspect_rc(cmd)) {
4198                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4199                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4200         }
4201         card->info.promisc_mode = setparms->data.mode;
4202         return 0;
4203 }
4204
4205 void qeth_setadp_promisc_mode(struct qeth_card *card)
4206 {
4207         enum qeth_ipa_promisc_modes mode;
4208         struct net_device *dev = card->dev;
4209         struct qeth_cmd_buffer *iob;
4210         struct qeth_ipa_cmd *cmd;
4211
4212         QETH_CARD_TEXT(card, 4, "setprom");
4213
4214         if (((dev->flags & IFF_PROMISC) &&
4215              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4216             (!(dev->flags & IFF_PROMISC) &&
4217              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4218                 return;
4219         mode = SET_PROMISC_MODE_OFF;
4220         if (dev->flags & IFF_PROMISC)
4221                 mode = SET_PROMISC_MODE_ON;
4222         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4223
4224         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4225                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4226         if (!iob)
4227                 return;
4228         cmd = __ipa_cmd(iob);
4229         cmd->data.setadapterparms.data.mode = mode;
4230         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4231 }
4232 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4233
4234 int qeth_change_mtu(struct net_device *dev, int new_mtu)
4235 {
4236         struct qeth_card *card;
4237         char dbf_text[15];
4238
4239         card = dev->ml_priv;
4240
4241         QETH_CARD_TEXT(card, 4, "chgmtu");
4242         sprintf(dbf_text, "%8x", new_mtu);
4243         QETH_CARD_TEXT(card, 4, dbf_text);
4244
4245         if (!qeth_mtu_is_valid(card, new_mtu))
4246                 return -EINVAL;
4247         dev->mtu = new_mtu;
4248         return 0;
4249 }
4250 EXPORT_SYMBOL_GPL(qeth_change_mtu);
4251
4252 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4253 {
4254         struct qeth_card *card;
4255
4256         card = dev->ml_priv;
4257
4258         QETH_CARD_TEXT(card, 5, "getstat");
4259
4260         return &card->stats;
4261 }
4262 EXPORT_SYMBOL_GPL(qeth_get_stats);
4263
4264 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4265                 struct qeth_reply *reply, unsigned long data)
4266 {
4267         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4268
4269         QETH_CARD_TEXT(card, 4, "chgmaccb");
4270         if (qeth_setadpparms_inspect_rc(cmd))
4271                 return 0;
4272
4273         if (!card->options.layer2 ||
4274             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4275                 ether_addr_copy(card->dev->dev_addr,
4276                                 cmd->data.setadapterparms.data.change_addr.addr);
4277                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4278         }
4279         return 0;
4280 }
4281
4282 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4283 {
4284         int rc;
4285         struct qeth_cmd_buffer *iob;
4286         struct qeth_ipa_cmd *cmd;
4287
4288         QETH_CARD_TEXT(card, 4, "chgmac");
4289
4290         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4291                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4292                                    sizeof(struct qeth_change_addr));
4293         if (!iob)
4294                 return -ENOMEM;
4295         cmd = __ipa_cmd(iob);
4296         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4297         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4298         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4299                         card->dev->dev_addr);
4300         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4301                                NULL);
4302         return rc;
4303 }
4304 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4305
4306 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4307                 struct qeth_reply *reply, unsigned long data)
4308 {
4309         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4310         struct qeth_set_access_ctrl *access_ctrl_req;
4311         int fallback = *(int *)reply->param;
4312
4313         QETH_CARD_TEXT(card, 4, "setaccb");
4314         if (cmd->hdr.return_code)
4315                 return 0;
4316         qeth_setadpparms_inspect_rc(cmd);
4317
4318         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4319         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4320         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4321         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4322                 cmd->data.setadapterparms.hdr.return_code);
4323         if (cmd->data.setadapterparms.hdr.return_code !=
4324                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4325                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4326                                 card->gdev->dev.kobj.name,
4327                                 access_ctrl_req->subcmd_code,
4328                                 cmd->data.setadapterparms.hdr.return_code);
4329         switch (cmd->data.setadapterparms.hdr.return_code) {
4330         case SET_ACCESS_CTRL_RC_SUCCESS:
4331                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4332                         dev_info(&card->gdev->dev,
4333                             "QDIO data connection isolation is deactivated\n");
4334                 } else {
4335                         dev_info(&card->gdev->dev,
4336                             "QDIO data connection isolation is activated\n");
4337                 }
4338                 break;
4339         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4340                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4341                                 "deactivated\n", dev_name(&card->gdev->dev));
4342                 if (fallback)
4343                         card->options.isolation = card->options.prev_isolation;
4344                 break;
4345         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4346                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4347                                 " activated\n", dev_name(&card->gdev->dev));
4348                 if (fallback)
4349                         card->options.isolation = card->options.prev_isolation;
4350                 break;
4351         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4352                 dev_err(&card->gdev->dev, "Adapter does not "
4353                         "support QDIO data connection isolation\n");
4354                 break;
4355         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4356                 dev_err(&card->gdev->dev,
4357                         "Adapter is dedicated. "
4358                         "QDIO data connection isolation not supported\n");
4359                 if (fallback)
4360                         card->options.isolation = card->options.prev_isolation;
4361                 break;
4362         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4363                 dev_err(&card->gdev->dev,
4364                         "TSO does not permit QDIO data connection isolation\n");
4365                 if (fallback)
4366                         card->options.isolation = card->options.prev_isolation;
4367                 break;
4368         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4369                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4370                         "support reflective relay mode\n");
4371                 if (fallback)
4372                         card->options.isolation = card->options.prev_isolation;
4373                 break;
4374         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4375                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4376                                         "enabled at the adjacent switch port");
4377                 if (fallback)
4378                         card->options.isolation = card->options.prev_isolation;
4379                 break;
4380         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4381                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4382                                         "at the adjacent switch failed\n");
4383                 break;
4384         default:
4385                 /* this should never happen */
4386                 if (fallback)
4387                         card->options.isolation = card->options.prev_isolation;
4388                 break;
4389         }
4390         return 0;
4391 }
4392
4393 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4394                 enum qeth_ipa_isolation_modes isolation, int fallback)
4395 {
4396         int rc;
4397         struct qeth_cmd_buffer *iob;
4398         struct qeth_ipa_cmd *cmd;
4399         struct qeth_set_access_ctrl *access_ctrl_req;
4400
4401         QETH_CARD_TEXT(card, 4, "setacctl");
4402
4403         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4404         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4405
4406         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4407                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4408                                    sizeof(struct qeth_set_access_ctrl));
4409         if (!iob)
4410                 return -ENOMEM;
4411         cmd = __ipa_cmd(iob);
4412         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4413         access_ctrl_req->subcmd_code = isolation;
4414
4415         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4416                                &fallback);
4417         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4418         return rc;
4419 }
4420
4421 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4422 {
4423         int rc = 0;
4424
4425         QETH_CARD_TEXT(card, 4, "setactlo");
4426
4427         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4428              card->info.type == QETH_CARD_TYPE_OSX) &&
4429              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4430                 rc = qeth_setadpparms_set_access_ctrl(card,
4431                         card->options.isolation, fallback);
4432                 if (rc) {
4433                         QETH_DBF_MESSAGE(3,
4434                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4435                                 card->gdev->dev.kobj.name,
4436                                 rc);
4437                         rc = -EOPNOTSUPP;
4438                 }
4439         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4440                 card->options.isolation = ISOLATION_MODE_NONE;
4441
4442                 dev_err(&card->gdev->dev, "Adapter does not "
4443                         "support QDIO data connection isolation\n");
4444                 rc = -EOPNOTSUPP;
4445         }
4446         return rc;
4447 }
4448 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4449
4450 void qeth_tx_timeout(struct net_device *dev)
4451 {
4452         struct qeth_card *card;
4453
4454         card = dev->ml_priv;
4455         QETH_CARD_TEXT(card, 4, "txtimeo");
4456         card->stats.tx_errors++;
4457         qeth_schedule_recovery(card);
4458 }
4459 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4460
4461 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4462 {
4463         struct qeth_card *card = dev->ml_priv;
4464         int rc = 0;
4465
4466         switch (regnum) {
4467         case MII_BMCR: /* Basic mode control register */
4468                 rc = BMCR_FULLDPLX;
4469                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4470                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4471                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4472                         rc |= BMCR_SPEED100;
4473                 break;
4474         case MII_BMSR: /* Basic mode status register */
4475                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4476                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4477                      BMSR_100BASE4;
4478                 break;
4479         case MII_PHYSID1: /* PHYS ID 1 */
4480                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4481                      dev->dev_addr[2];
4482                 rc = (rc >> 5) & 0xFFFF;
4483                 break;
4484         case MII_PHYSID2: /* PHYS ID 2 */
4485                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4486                 break;
4487         case MII_ADVERTISE: /* Advertisement control reg */
4488                 rc = ADVERTISE_ALL;
4489                 break;
4490         case MII_LPA: /* Link partner ability reg */
4491                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4492                      LPA_100BASE4 | LPA_LPACK;
4493                 break;
4494         case MII_EXPANSION: /* Expansion register */
4495                 break;
4496         case MII_DCOUNTER: /* disconnect counter */
4497                 break;
4498         case MII_FCSCOUNTER: /* false carrier counter */
4499                 break;
4500         case MII_NWAYTEST: /* N-way auto-neg test register */
4501                 break;
4502         case MII_RERRCOUNTER: /* rx error counter */
4503                 rc = card->stats.rx_errors;
4504                 break;
4505         case MII_SREVISION: /* silicon revision */
4506                 break;
4507         case MII_RESV1: /* reserved 1 */
4508                 break;
4509         case MII_LBRERROR: /* loopback, rx, bypass error */
4510                 break;
4511         case MII_PHYADDR: /* physical address */
4512                 break;
4513         case MII_RESV2: /* reserved 2 */
4514                 break;
4515         case MII_TPISTATUS: /* TPI status for 10mbps */
4516                 break;
4517         case MII_NCONFIG: /* network interface config */
4518                 break;
4519         default:
4520                 break;
4521         }
4522         return rc;
4523 }
4524
4525 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4526                 struct qeth_cmd_buffer *iob, int len,
4527                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4528                         unsigned long),
4529                 void *reply_param)
4530 {
4531         u16 s1, s2;
4532
4533         QETH_CARD_TEXT(card, 4, "sendsnmp");
4534
4535         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4536         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4537                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4538         /* adjust PDU length fields in IPA_PDU_HEADER */
4539         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4540         s2 = (u32) len;
4541         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4542         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4543         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4544         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4545         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4546                                       reply_cb, reply_param);
4547 }
4548
4549 static int qeth_snmp_command_cb(struct qeth_card *card,
4550                 struct qeth_reply *reply, unsigned long sdata)
4551 {
4552         struct qeth_ipa_cmd *cmd;
4553         struct qeth_arp_query_info *qinfo;
4554         struct qeth_snmp_cmd *snmp;
4555         unsigned char *data;
4556         __u16 data_len;
4557
4558         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4559
4560         cmd = (struct qeth_ipa_cmd *) sdata;
4561         data = (unsigned char *)((char *)cmd - reply->offset);
4562         qinfo = (struct qeth_arp_query_info *) reply->param;
4563         snmp = &cmd->data.setadapterparms.data.snmp;
4564
4565         if (cmd->hdr.return_code) {
4566                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4567                 return 0;
4568         }
4569         if (cmd->data.setadapterparms.hdr.return_code) {
4570                 cmd->hdr.return_code =
4571                         cmd->data.setadapterparms.hdr.return_code;
4572                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4573                 return 0;
4574         }
4575         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4576         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4577                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4578         else
4579                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4580
4581         /* check if there is enough room in userspace */
4582         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4583                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4584                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4585                 return 0;
4586         }
4587         QETH_CARD_TEXT_(card, 4, "snore%i",
4588                        cmd->data.setadapterparms.hdr.used_total);
4589         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4590                 cmd->data.setadapterparms.hdr.seq_no);
4591         /*copy entries to user buffer*/
4592         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4593                 memcpy(qinfo->udata + qinfo->udata_offset,
4594                        (char *)snmp,
4595                        data_len + offsetof(struct qeth_snmp_cmd, data));
4596                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4597         } else {
4598                 memcpy(qinfo->udata + qinfo->udata_offset,
4599                        (char *)&snmp->request, data_len);
4600         }
4601         qinfo->udata_offset += data_len;
4602         /* check if all replies received ... */
4603                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4604                                cmd->data.setadapterparms.hdr.used_total);
4605                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4606                                cmd->data.setadapterparms.hdr.seq_no);
4607         if (cmd->data.setadapterparms.hdr.seq_no <
4608             cmd->data.setadapterparms.hdr.used_total)
4609                 return 1;
4610         return 0;
4611 }
4612
4613 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4614 {
4615         struct qeth_cmd_buffer *iob;
4616         struct qeth_ipa_cmd *cmd;
4617         struct qeth_snmp_ureq *ureq;
4618         unsigned int req_len;
4619         struct qeth_arp_query_info qinfo = {0, };
4620         int rc = 0;
4621
4622         QETH_CARD_TEXT(card, 3, "snmpcmd");
4623
4624         if (card->info.guestlan)
4625                 return -EOPNOTSUPP;
4626
4627         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4628             (!card->options.layer2)) {
4629                 return -EOPNOTSUPP;
4630         }
4631         /* skip 4 bytes (data_len struct member) to get req_len */
4632         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4633                 return -EFAULT;
4634         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4635                        sizeof(struct qeth_ipacmd_hdr) -
4636                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4637                 return -EINVAL;
4638         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4639         if (IS_ERR(ureq)) {
4640                 QETH_CARD_TEXT(card, 2, "snmpnome");
4641                 return PTR_ERR(ureq);
4642         }
4643         qinfo.udata_len = ureq->hdr.data_len;
4644         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4645         if (!qinfo.udata) {
4646                 kfree(ureq);
4647                 return -ENOMEM;
4648         }
4649         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4650
4651         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4652                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4653         if (!iob) {
4654                 rc = -ENOMEM;
4655                 goto out;
4656         }
4657         cmd = __ipa_cmd(iob);
4658         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4659         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4660                                     qeth_snmp_command_cb, (void *)&qinfo);
4661         if (rc)
4662                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4663                            QETH_CARD_IFNAME(card), rc);
4664         else {
4665                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4666                         rc = -EFAULT;
4667         }
4668 out:
4669         kfree(ureq);
4670         kfree(qinfo.udata);
4671         return rc;
4672 }
4673
4674 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4675                 struct qeth_reply *reply, unsigned long data)
4676 {
4677         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4678         struct qeth_qoat_priv *priv;
4679         char *resdata;
4680         int resdatalen;
4681
4682         QETH_CARD_TEXT(card, 3, "qoatcb");
4683         if (qeth_setadpparms_inspect_rc(cmd))
4684                 return 0;
4685
4686         priv = (struct qeth_qoat_priv *)reply->param;
4687         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4688         resdata = (char *)data + 28;
4689
4690         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4691                 cmd->hdr.return_code = IPA_RC_FFFF;
4692                 return 0;
4693         }
4694
4695         memcpy((priv->buffer + priv->response_len), resdata,
4696                 resdatalen);
4697         priv->response_len += resdatalen;
4698
4699         if (cmd->data.setadapterparms.hdr.seq_no <
4700             cmd->data.setadapterparms.hdr.used_total)
4701                 return 1;
4702         return 0;
4703 }
4704
4705 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4706 {
4707         int rc = 0;
4708         struct qeth_cmd_buffer *iob;
4709         struct qeth_ipa_cmd *cmd;
4710         struct qeth_query_oat *oat_req;
4711         struct qeth_query_oat_data oat_data;
4712         struct qeth_qoat_priv priv;
4713         void __user *tmp;
4714
4715         QETH_CARD_TEXT(card, 3, "qoatcmd");
4716
4717         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4718                 rc = -EOPNOTSUPP;
4719                 goto out;
4720         }
4721
4722         if (copy_from_user(&oat_data, udata,
4723             sizeof(struct qeth_query_oat_data))) {
4724                         rc = -EFAULT;
4725                         goto out;
4726         }
4727
4728         priv.buffer_len = oat_data.buffer_len;
4729         priv.response_len = 0;
4730         priv.buffer =  kzalloc(oat_data.buffer_len, GFP_KERNEL);
4731         if (!priv.buffer) {
4732                 rc = -ENOMEM;
4733                 goto out;
4734         }
4735
4736         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4737                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4738                                    sizeof(struct qeth_query_oat));
4739         if (!iob) {
4740                 rc = -ENOMEM;
4741                 goto out_free;
4742         }
4743         cmd = __ipa_cmd(iob);
4744         oat_req = &cmd->data.setadapterparms.data.query_oat;
4745         oat_req->subcmd_code = oat_data.command;
4746
4747         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4748                                &priv);
4749         if (!rc) {
4750                 if (is_compat_task())
4751                         tmp = compat_ptr(oat_data.ptr);
4752                 else
4753                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4754
4755                 if (copy_to_user(tmp, priv.buffer,
4756                     priv.response_len)) {
4757                         rc = -EFAULT;
4758                         goto out_free;
4759                 }
4760
4761                 oat_data.response_len = priv.response_len;
4762
4763                 if (copy_to_user(udata, &oat_data,
4764                     sizeof(struct qeth_query_oat_data)))
4765                         rc = -EFAULT;
4766         } else
4767                 if (rc == IPA_RC_FFFF)
4768                         rc = -EFAULT;
4769
4770 out_free:
4771         kfree(priv.buffer);
4772 out:
4773         return rc;
4774 }
4775
4776 static int qeth_query_card_info_cb(struct qeth_card *card,
4777                                    struct qeth_reply *reply, unsigned long data)
4778 {
4779         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4780         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4781         struct qeth_query_card_info *card_info;
4782
4783         QETH_CARD_TEXT(card, 2, "qcrdincb");
4784         if (qeth_setadpparms_inspect_rc(cmd))
4785                 return 0;
4786
4787         card_info = &cmd->data.setadapterparms.data.card_info;
4788         carrier_info->card_type = card_info->card_type;
4789         carrier_info->port_mode = card_info->port_mode;
4790         carrier_info->port_speed = card_info->port_speed;
4791         return 0;
4792 }
4793
4794 static int qeth_query_card_info(struct qeth_card *card,
4795                                 struct carrier_info *carrier_info)
4796 {
4797         struct qeth_cmd_buffer *iob;
4798
4799         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4800         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4801                 return -EOPNOTSUPP;
4802         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4803                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4804         if (!iob)
4805                 return -ENOMEM;
4806         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4807                                         (void *)carrier_info);
4808 }
4809
4810 /**
4811  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4812  * @card: pointer to a qeth_card
4813  *
4814  * Returns
4815  *      0, if a MAC address has been set for the card's netdevice
4816  *      a return code, for various error conditions
4817  */
4818 int qeth_vm_request_mac(struct qeth_card *card)
4819 {
4820         struct diag26c_mac_resp *response;
4821         struct diag26c_mac_req *request;
4822         struct ccw_dev_id id;
4823         int rc;
4824
4825         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4826
4827         if (!card->dev)
4828                 return -ENODEV;
4829
4830         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4831         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4832         if (!request || !response) {
4833                 rc = -ENOMEM;
4834                 goto out;
4835         }
4836
4837         ccw_device_get_id(CARD_RDEV(card), &id);
4838         request->resp_buf_len = sizeof(*response);
4839         request->resp_version = DIAG26C_VERSION2;
4840         request->op_code = DIAG26C_GET_MAC;
4841         request->devno = id.devno;
4842
4843         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4844         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4845         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4846         if (rc)
4847                 goto out;
4848         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4849
4850         if (request->resp_buf_len < sizeof(*response) ||
4851             response->version != request->resp_version) {
4852                 rc = -EIO;
4853                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4854                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4855                              sizeof(request->resp_buf_len));
4856         } else if (!is_valid_ether_addr(response->mac)) {
4857                 rc = -EINVAL;
4858                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4859                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4860         } else {
4861                 ether_addr_copy(card->dev->dev_addr, response->mac);
4862         }
4863
4864 out:
4865         kfree(response);
4866         kfree(request);
4867         return rc;
4868 }
4869 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4870
4871 static int qeth_get_qdio_q_format(struct qeth_card *card)
4872 {
4873         if (card->info.type == QETH_CARD_TYPE_IQD)
4874                 return QDIO_IQDIO_QFMT;
4875         else
4876                 return QDIO_QETH_QFMT;
4877 }
4878
4879 static void qeth_determine_capabilities(struct qeth_card *card)
4880 {
4881         int rc;
4882         int length;
4883         char *prcd;
4884         struct ccw_device *ddev;
4885         int ddev_offline = 0;
4886
4887         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4888         ddev = CARD_DDEV(card);
4889         if (!ddev->online) {
4890                 ddev_offline = 1;
4891                 rc = ccw_device_set_online(ddev);
4892                 if (rc) {
4893                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4894                         goto out;
4895                 }
4896         }
4897
4898         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4899         if (rc) {
4900                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4901                         dev_name(&card->gdev->dev), rc);
4902                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4903                 goto out_offline;
4904         }
4905         qeth_configure_unitaddr(card, prcd);
4906         if (ddev_offline)
4907                 qeth_configure_blkt_default(card, prcd);
4908         kfree(prcd);
4909
4910         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4911         if (rc)
4912                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4913
4914         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4915         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4916         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4917         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4918         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4919         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4920             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4921             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4922                 dev_info(&card->gdev->dev,
4923                         "Completion Queueing supported\n");
4924         } else {
4925                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4926         }
4927
4928
4929 out_offline:
4930         if (ddev_offline == 1)
4931                 ccw_device_set_offline(ddev);
4932 out:
4933         return;
4934 }
4935
4936 static void qeth_qdio_establish_cq(struct qeth_card *card,
4937                                    struct qdio_buffer **in_sbal_ptrs,
4938                                    void (**queue_start_poll)
4939                                         (struct ccw_device *, int,
4940                                          unsigned long))
4941 {
4942         int i;
4943
4944         if (card->options.cq == QETH_CQ_ENABLED) {
4945                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4946                              (card->qdio.no_in_queues - 1);
4947                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4948                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4949                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4950                 }
4951
4952                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4953         }
4954 }
4955
4956 static int qeth_qdio_establish(struct qeth_card *card)
4957 {
4958         struct qdio_initialize init_data;
4959         char *qib_param_field;
4960         struct qdio_buffer **in_sbal_ptrs;
4961         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4962         struct qdio_buffer **out_sbal_ptrs;
4963         int i, j, k;
4964         int rc = 0;
4965
4966         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4967
4968         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4969                                   GFP_KERNEL);
4970         if (!qib_param_field) {
4971                 rc =  -ENOMEM;
4972                 goto out_free_nothing;
4973         }
4974
4975         qeth_create_qib_param_field(card, qib_param_field);
4976         qeth_create_qib_param_field_blkt(card, qib_param_field);
4977
4978         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4979                                sizeof(void *),
4980                                GFP_KERNEL);
4981         if (!in_sbal_ptrs) {
4982                 rc = -ENOMEM;
4983                 goto out_free_qib_param;
4984         }
4985         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4986                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4987                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4988         }
4989
4990         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4991                                    GFP_KERNEL);
4992         if (!queue_start_poll) {
4993                 rc = -ENOMEM;
4994                 goto out_free_in_sbals;
4995         }
4996         for (i = 0; i < card->qdio.no_in_queues; ++i)
4997                 queue_start_poll[i] = qeth_qdio_start_poll;
4998
4999         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
5000
5001         out_sbal_ptrs =
5002                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
5003                         sizeof(void *),
5004                         GFP_KERNEL);
5005         if (!out_sbal_ptrs) {
5006                 rc = -ENOMEM;
5007                 goto out_free_queue_start_poll;
5008         }
5009         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
5010                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
5011                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
5012                                 card->qdio.out_qs[i]->bufs[j]->buffer);
5013                 }
5014
5015         memset(&init_data, 0, sizeof(struct qdio_initialize));
5016         init_data.cdev                   = CARD_DDEV(card);
5017         init_data.q_format               = qeth_get_qdio_q_format(card);
5018         init_data.qib_param_field_format = 0;
5019         init_data.qib_param_field        = qib_param_field;
5020         init_data.no_input_qs            = card->qdio.no_in_queues;
5021         init_data.no_output_qs           = card->qdio.no_out_queues;
5022         init_data.input_handler          = qeth_qdio_input_handler;
5023         init_data.output_handler         = qeth_qdio_output_handler;
5024         init_data.queue_start_poll_array = queue_start_poll;
5025         init_data.int_parm               = (unsigned long) card;
5026         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
5027         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
5028         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5029         init_data.scan_threshold =
5030                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5031
5032         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5033                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5034                 rc = qdio_allocate(&init_data);
5035                 if (rc) {
5036                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5037                         goto out;
5038                 }
5039                 rc = qdio_establish(&init_data);
5040                 if (rc) {
5041                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5042                         qdio_free(CARD_DDEV(card));
5043                 }
5044         }
5045
5046         switch (card->options.cq) {
5047         case QETH_CQ_ENABLED:
5048                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5049                 break;
5050         case QETH_CQ_DISABLED:
5051                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5052                 break;
5053         default:
5054                 break;
5055         }
5056 out:
5057         kfree(out_sbal_ptrs);
5058 out_free_queue_start_poll:
5059         kfree(queue_start_poll);
5060 out_free_in_sbals:
5061         kfree(in_sbal_ptrs);
5062 out_free_qib_param:
5063         kfree(qib_param_field);
5064 out_free_nothing:
5065         return rc;
5066 }
5067
5068 static void qeth_core_free_card(struct qeth_card *card)
5069 {
5070
5071         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5072         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5073         qeth_clean_channel(&card->read);
5074         qeth_clean_channel(&card->write);
5075         qeth_free_qdio_buffers(card);
5076         unregister_service_level(&card->qeth_service_level);
5077         kfree(card);
5078 }
5079
5080 void qeth_trace_features(struct qeth_card *card)
5081 {
5082         QETH_CARD_TEXT(card, 2, "features");
5083         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5084         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5085         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5086         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5087                       sizeof(card->info.diagass_support));
5088 }
5089 EXPORT_SYMBOL_GPL(qeth_trace_features);
5090
5091 static struct ccw_device_id qeth_ids[] = {
5092         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5093                                         .driver_info = QETH_CARD_TYPE_OSD},
5094         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5095                                         .driver_info = QETH_CARD_TYPE_IQD},
5096         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5097                                         .driver_info = QETH_CARD_TYPE_OSN},
5098         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5099                                         .driver_info = QETH_CARD_TYPE_OSM},
5100         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5101                                         .driver_info = QETH_CARD_TYPE_OSX},
5102         {},
5103 };
5104 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5105
5106 static struct ccw_driver qeth_ccw_driver = {
5107         .driver = {
5108                 .owner = THIS_MODULE,
5109                 .name = "qeth",
5110         },
5111         .ids = qeth_ids,
5112         .probe = ccwgroup_probe_ccwdev,
5113         .remove = ccwgroup_remove_ccwdev,
5114 };
5115
5116 int qeth_core_hardsetup_card(struct qeth_card *card)
5117 {
5118         int retries = 3;
5119         int rc;
5120
5121         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5122         atomic_set(&card->force_alloc_skb, 0);
5123         qeth_update_from_chp_desc(card);
5124 retry:
5125         if (retries < 3)
5126                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5127                         dev_name(&card->gdev->dev));
5128         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5129         ccw_device_set_offline(CARD_DDEV(card));
5130         ccw_device_set_offline(CARD_WDEV(card));
5131         ccw_device_set_offline(CARD_RDEV(card));
5132         qdio_free(CARD_DDEV(card));
5133         rc = ccw_device_set_online(CARD_RDEV(card));
5134         if (rc)
5135                 goto retriable;
5136         rc = ccw_device_set_online(CARD_WDEV(card));
5137         if (rc)
5138                 goto retriable;
5139         rc = ccw_device_set_online(CARD_DDEV(card));
5140         if (rc)
5141                 goto retriable;
5142 retriable:
5143         if (rc == -ERESTARTSYS) {
5144                 QETH_DBF_TEXT(SETUP, 2, "break1");
5145                 return rc;
5146         } else if (rc) {
5147                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5148                 if (--retries < 0)
5149                         goto out;
5150                 else
5151                         goto retry;
5152         }
5153         qeth_determine_capabilities(card);
5154         qeth_init_tokens(card);
5155         qeth_init_func_level(card);
5156         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5157         if (rc == -ERESTARTSYS) {
5158                 QETH_DBF_TEXT(SETUP, 2, "break2");
5159                 return rc;
5160         } else if (rc) {
5161                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5162                 if (--retries < 0)
5163                         goto out;
5164                 else
5165                         goto retry;
5166         }
5167         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5168         if (rc == -ERESTARTSYS) {
5169                 QETH_DBF_TEXT(SETUP, 2, "break3");
5170                 return rc;
5171         } else if (rc) {
5172                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5173                 if (--retries < 0)
5174                         goto out;
5175                 else
5176                         goto retry;
5177         }
5178         card->read_or_write_problem = 0;
5179         rc = qeth_mpc_initialize(card);
5180         if (rc) {
5181                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5182                 goto out;
5183         }
5184
5185         rc = qeth_send_startlan(card);
5186         if (rc) {
5187                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5188                 if (rc == IPA_RC_LAN_OFFLINE) {
5189                         dev_warn(&card->gdev->dev,
5190                                 "The LAN is offline\n");
5191                         card->lan_online = 0;
5192                 } else {
5193                         rc = -ENODEV;
5194                         goto out;
5195                 }
5196         } else
5197                 card->lan_online = 1;
5198
5199         card->options.ipa4.supported_funcs = 0;
5200         card->options.ipa6.supported_funcs = 0;
5201         card->options.adp.supported_funcs = 0;
5202         card->options.sbp.supported_funcs = 0;
5203         card->info.diagass_support = 0;
5204         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5205         if (rc == -ENOMEM)
5206                 goto out;
5207         if (qeth_is_supported(card, IPA_IPV6)) {
5208                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5209                 if (rc == -ENOMEM)
5210                         goto out;
5211         }
5212         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5213                 rc = qeth_query_setadapterparms(card);
5214                 if (rc < 0) {
5215                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5216                         goto out;
5217                 }
5218         }
5219         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5220                 rc = qeth_query_setdiagass(card);
5221                 if (rc < 0) {
5222                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5223                         goto out;
5224                 }
5225         }
5226         return 0;
5227 out:
5228         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5229                 "an error on the device\n");
5230         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5231                 dev_name(&card->gdev->dev), rc);
5232         return rc;
5233 }
5234 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5235
5236 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5237                                  struct sk_buff *skb, int offset, int data_len)
5238 {
5239         struct page *page = virt_to_page(element->addr);
5240         unsigned int next_frag;
5241
5242         /* first fill the linear space */
5243         if (!skb->len) {
5244                 unsigned int linear = min(data_len, skb_tailroom(skb));
5245
5246                 skb_put_data(skb, element->addr + offset, linear);
5247                 data_len -= linear;
5248                 if (!data_len)
5249                         return;
5250                 offset += linear;
5251                 /* fall through to add page frag for remaining data */
5252         }
5253
5254         next_frag = skb_shinfo(skb)->nr_frags;
5255         get_page(page);
5256         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5257 }
5258
5259 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5260 {
5261         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5262 }
5263
5264 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5265                 struct qeth_qdio_buffer *qethbuffer,
5266                 struct qdio_buffer_element **__element, int *__offset,
5267                 struct qeth_hdr **hdr)
5268 {
5269         struct qdio_buffer_element *element = *__element;
5270         struct qdio_buffer *buffer = qethbuffer->buffer;
5271         int offset = *__offset;
5272         struct sk_buff *skb;
5273         int skb_len = 0;
5274         void *data_ptr;
5275         int data_len;
5276         int headroom = 0;
5277         int use_rx_sg = 0;
5278
5279         /* qeth_hdr must not cross element boundaries */
5280         while (element->length < offset + sizeof(struct qeth_hdr)) {
5281                 if (qeth_is_last_sbale(element))
5282                         return NULL;
5283                 element++;
5284                 offset = 0;
5285         }
5286         *hdr = element->addr + offset;
5287
5288         offset += sizeof(struct qeth_hdr);
5289         switch ((*hdr)->hdr.l2.id) {
5290         case QETH_HEADER_TYPE_LAYER2:
5291                 skb_len = (*hdr)->hdr.l2.pkt_length;
5292                 break;
5293         case QETH_HEADER_TYPE_LAYER3:
5294                 skb_len = (*hdr)->hdr.l3.length;
5295                 headroom = ETH_HLEN;
5296                 break;
5297         case QETH_HEADER_TYPE_OSN:
5298                 skb_len = (*hdr)->hdr.osn.pdu_length;
5299                 headroom = sizeof(struct qeth_hdr);
5300                 break;
5301         default:
5302                 break;
5303         }
5304
5305         if (!skb_len)
5306                 return NULL;
5307
5308         if (((skb_len >= card->options.rx_sg_cb) &&
5309              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5310              (!atomic_read(&card->force_alloc_skb))) ||
5311             (card->options.cq == QETH_CQ_ENABLED))
5312                 use_rx_sg = 1;
5313
5314         if (use_rx_sg && qethbuffer->rx_skb) {
5315                 /* QETH_CQ_ENABLED only: */
5316                 skb = qethbuffer->rx_skb;
5317                 qethbuffer->rx_skb = NULL;
5318         } else {
5319                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5320
5321                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5322         }
5323         if (!skb)
5324                 goto no_mem;
5325         if (headroom)
5326                 skb_reserve(skb, headroom);
5327
5328         data_ptr = element->addr + offset;
5329         while (skb_len) {
5330                 data_len = min(skb_len, (int)(element->length - offset));
5331                 if (data_len) {
5332                         if (use_rx_sg)
5333                                 qeth_create_skb_frag(element, skb, offset,
5334                                                      data_len);
5335                         else
5336                                 skb_put_data(skb, data_ptr, data_len);
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_done(napi, work_done);
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 = __ipa_cmd(iob);
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 = __ipa_cmd(iob);
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_prot(struct qeth_card *card,
5520                                       enum qeth_ipa_funcs ipa_func,
5521                                       u16 cmd_code, long data,
5522                                       enum qeth_prot_versions prot)
5523 {
5524         int rc;
5525         int length = 0;
5526         struct qeth_cmd_buffer *iob;
5527
5528         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5529         if (data)
5530                 length = sizeof(__u32);
5531         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
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_prot);
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         qeth_determine_card_type(card);
5752         rc = qeth_setup_card(card);
5753         if (rc) {
5754                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
5755                 goto err_card;
5756         }
5757
5758         qeth_determine_capabilities(card);
5759         enforced_disc = qeth_enforce_discipline(card);
5760         switch (enforced_disc) {
5761         case QETH_DISCIPLINE_UNDETERMINED:
5762                 gdev->dev.type = &qeth_generic_devtype;
5763                 break;
5764         default:
5765                 card->info.layer_enforced = true;
5766                 rc = qeth_core_load_discipline(card, enforced_disc);
5767                 if (rc)
5768                         goto err_card;
5769
5770                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5771                                         ? card->discipline->devtype
5772                                         : &qeth_osn_devtype;
5773                 rc = card->discipline->setup(card->gdev);
5774                 if (rc)
5775                         goto err_disc;
5776                 break;
5777         }
5778
5779         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5780         list_add_tail(&card->list, &qeth_core_card_list.list);
5781         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5782         return 0;
5783
5784 err_disc:
5785         qeth_core_free_discipline(card);
5786 err_card:
5787         qeth_core_free_card(card);
5788 err_dev:
5789         put_device(dev);
5790         return rc;
5791 }
5792
5793 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5794 {
5795         unsigned long flags;
5796         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5797
5798         QETH_DBF_TEXT(SETUP, 2, "removedv");
5799
5800         if (card->discipline) {
5801                 card->discipline->remove(gdev);
5802                 qeth_core_free_discipline(card);
5803         }
5804
5805         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5806         list_del(&card->list);
5807         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5808         qeth_core_free_card(card);
5809         dev_set_drvdata(&gdev->dev, NULL);
5810         put_device(&gdev->dev);
5811         return;
5812 }
5813
5814 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5815 {
5816         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5817         int rc = 0;
5818         enum qeth_discipline_id def_discipline;
5819
5820         if (!card->discipline) {
5821                 if (card->info.type == QETH_CARD_TYPE_IQD)
5822                         def_discipline = QETH_DISCIPLINE_LAYER3;
5823                 else
5824                         def_discipline = QETH_DISCIPLINE_LAYER2;
5825                 rc = qeth_core_load_discipline(card, def_discipline);
5826                 if (rc)
5827                         goto err;
5828                 rc = card->discipline->setup(card->gdev);
5829                 if (rc) {
5830                         qeth_core_free_discipline(card);
5831                         goto err;
5832                 }
5833         }
5834         rc = card->discipline->set_online(gdev);
5835 err:
5836         return rc;
5837 }
5838
5839 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5840 {
5841         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5842         return card->discipline->set_offline(gdev);
5843 }
5844
5845 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5846 {
5847         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5848         qeth_set_allowed_threads(card, 0, 1);
5849         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5850                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5851         qeth_qdio_clear_card(card, 0);
5852         qeth_clear_qdio_buffers(card);
5853         qdio_free(CARD_DDEV(card));
5854 }
5855
5856 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5857 {
5858         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5859         if (card->discipline && card->discipline->freeze)
5860                 return card->discipline->freeze(gdev);
5861         return 0;
5862 }
5863
5864 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5865 {
5866         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5867         if (card->discipline && card->discipline->thaw)
5868                 return card->discipline->thaw(gdev);
5869         return 0;
5870 }
5871
5872 static int qeth_core_restore(struct ccwgroup_device *gdev)
5873 {
5874         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5875         if (card->discipline && card->discipline->restore)
5876                 return card->discipline->restore(gdev);
5877         return 0;
5878 }
5879
5880 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5881         .driver = {
5882                 .owner = THIS_MODULE,
5883                 .name = "qeth",
5884         },
5885         .ccw_driver = &qeth_ccw_driver,
5886         .setup = qeth_core_probe_device,
5887         .remove = qeth_core_remove_device,
5888         .set_online = qeth_core_set_online,
5889         .set_offline = qeth_core_set_offline,
5890         .shutdown = qeth_core_shutdown,
5891         .prepare = NULL,
5892         .complete = NULL,
5893         .freeze = qeth_core_freeze,
5894         .thaw = qeth_core_thaw,
5895         .restore = qeth_core_restore,
5896 };
5897
5898 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5899                            size_t count)
5900 {
5901         int err;
5902
5903         err = ccwgroup_create_dev(qeth_core_root_dev,
5904                                   &qeth_core_ccwgroup_driver, 3, buf);
5905
5906         return err ? err : count;
5907 }
5908 static DRIVER_ATTR_WO(group);
5909
5910 static struct attribute *qeth_drv_attrs[] = {
5911         &driver_attr_group.attr,
5912         NULL,
5913 };
5914 static struct attribute_group qeth_drv_attr_group = {
5915         .attrs = qeth_drv_attrs,
5916 };
5917 static const struct attribute_group *qeth_drv_attr_groups[] = {
5918         &qeth_drv_attr_group,
5919         NULL,
5920 };
5921
5922 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5923 {
5924         struct qeth_card *card = dev->ml_priv;
5925         struct mii_ioctl_data *mii_data;
5926         int rc = 0;
5927
5928         if (!card)
5929                 return -ENODEV;
5930
5931         if (!qeth_card_hw_is_reachable(card))
5932                 return -ENODEV;
5933
5934         if (card->info.type == QETH_CARD_TYPE_OSN)
5935                 return -EPERM;
5936
5937         switch (cmd) {
5938         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5939                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5940                 break;
5941         case SIOC_QETH_GET_CARD_TYPE:
5942                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5943                      card->info.type == QETH_CARD_TYPE_OSM ||
5944                      card->info.type == QETH_CARD_TYPE_OSX) &&
5945                     !card->info.guestlan)
5946                         return 1;
5947                 else
5948                         return 0;
5949         case SIOCGMIIPHY:
5950                 mii_data = if_mii(rq);
5951                 mii_data->phy_id = 0;
5952                 break;
5953         case SIOCGMIIREG:
5954                 mii_data = if_mii(rq);
5955                 if (mii_data->phy_id != 0)
5956                         rc = -EINVAL;
5957                 else
5958                         mii_data->val_out = qeth_mdio_read(dev,
5959                                 mii_data->phy_id, mii_data->reg_num);
5960                 break;
5961         case SIOC_QETH_QUERY_OAT:
5962                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5963                 break;
5964         default:
5965                 if (card->discipline->do_ioctl)
5966                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5967                 else
5968                         rc = -EOPNOTSUPP;
5969         }
5970         if (rc)
5971                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5972         return rc;
5973 }
5974 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5975
5976 static struct {
5977         const char str[ETH_GSTRING_LEN];
5978 } qeth_ethtool_stats_keys[] = {
5979 /*  0 */{"rx skbs"},
5980         {"rx buffers"},
5981         {"tx skbs"},
5982         {"tx buffers"},
5983         {"tx skbs no packing"},
5984         {"tx buffers no packing"},
5985         {"tx skbs packing"},
5986         {"tx buffers packing"},
5987         {"tx sg skbs"},
5988         {"tx sg frags"},
5989 /* 10 */{"rx sg skbs"},
5990         {"rx sg frags"},
5991         {"rx sg page allocs"},
5992         {"tx large kbytes"},
5993         {"tx large count"},
5994         {"tx pk state ch n->p"},
5995         {"tx pk state ch p->n"},
5996         {"tx pk watermark low"},
5997         {"tx pk watermark high"},
5998         {"queue 0 buffer usage"},
5999 /* 20 */{"queue 1 buffer usage"},
6000         {"queue 2 buffer usage"},
6001         {"queue 3 buffer usage"},
6002         {"rx poll time"},
6003         {"rx poll count"},
6004         {"rx do_QDIO time"},
6005         {"rx do_QDIO count"},
6006         {"tx handler time"},
6007         {"tx handler count"},
6008         {"tx time"},
6009 /* 30 */{"tx count"},
6010         {"tx do_QDIO time"},
6011         {"tx do_QDIO count"},
6012         {"tx csum"},
6013         {"tx lin"},
6014         {"tx linfail"},
6015         {"cq handler count"},
6016         {"cq handler time"},
6017         {"rx csum"}
6018 };
6019
6020 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6021 {
6022         switch (stringset) {
6023         case ETH_SS_STATS:
6024                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6025         default:
6026                 return -EINVAL;
6027         }
6028 }
6029 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6030
6031 void qeth_core_get_ethtool_stats(struct net_device *dev,
6032                 struct ethtool_stats *stats, u64 *data)
6033 {
6034         struct qeth_card *card = dev->ml_priv;
6035         data[0] = card->stats.rx_packets -
6036                                 card->perf_stats.initial_rx_packets;
6037         data[1] = card->perf_stats.bufs_rec;
6038         data[2] = card->stats.tx_packets -
6039                                 card->perf_stats.initial_tx_packets;
6040         data[3] = card->perf_stats.bufs_sent;
6041         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6042                         - card->perf_stats.skbs_sent_pack;
6043         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6044         data[6] = card->perf_stats.skbs_sent_pack;
6045         data[7] = card->perf_stats.bufs_sent_pack;
6046         data[8] = card->perf_stats.sg_skbs_sent;
6047         data[9] = card->perf_stats.sg_frags_sent;
6048         data[10] = card->perf_stats.sg_skbs_rx;
6049         data[11] = card->perf_stats.sg_frags_rx;
6050         data[12] = card->perf_stats.sg_alloc_page_rx;
6051         data[13] = (card->perf_stats.large_send_bytes >> 10);
6052         data[14] = card->perf_stats.large_send_cnt;
6053         data[15] = card->perf_stats.sc_dp_p;
6054         data[16] = card->perf_stats.sc_p_dp;
6055         data[17] = QETH_LOW_WATERMARK_PACK;
6056         data[18] = QETH_HIGH_WATERMARK_PACK;
6057         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6058         data[20] = (card->qdio.no_out_queues > 1) ?
6059                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6060         data[21] = (card->qdio.no_out_queues > 2) ?
6061                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6062         data[22] = (card->qdio.no_out_queues > 3) ?
6063                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6064         data[23] = card->perf_stats.inbound_time;
6065         data[24] = card->perf_stats.inbound_cnt;
6066         data[25] = card->perf_stats.inbound_do_qdio_time;
6067         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6068         data[27] = card->perf_stats.outbound_handler_time;
6069         data[28] = card->perf_stats.outbound_handler_cnt;
6070         data[29] = card->perf_stats.outbound_time;
6071         data[30] = card->perf_stats.outbound_cnt;
6072         data[31] = card->perf_stats.outbound_do_qdio_time;
6073         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6074         data[33] = card->perf_stats.tx_csum;
6075         data[34] = card->perf_stats.tx_lin;
6076         data[35] = card->perf_stats.tx_linfail;
6077         data[36] = card->perf_stats.cq_cnt;
6078         data[37] = card->perf_stats.cq_time;
6079         data[38] = card->perf_stats.rx_csum;
6080 }
6081 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6082
6083 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6084 {
6085         switch (stringset) {
6086         case ETH_SS_STATS:
6087                 memcpy(data, &qeth_ethtool_stats_keys,
6088                         sizeof(qeth_ethtool_stats_keys));
6089                 break;
6090         default:
6091                 WARN_ON(1);
6092                 break;
6093         }
6094 }
6095 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6096
6097 void qeth_core_get_drvinfo(struct net_device *dev,
6098                 struct ethtool_drvinfo *info)
6099 {
6100         struct qeth_card *card = dev->ml_priv;
6101
6102         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
6103                 sizeof(info->driver));
6104         strlcpy(info->version, "1.0", sizeof(info->version));
6105         strlcpy(info->fw_version, card->info.mcl_level,
6106                 sizeof(info->fw_version));
6107         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6108                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6109 }
6110 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6111
6112 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6113 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6114 /* Always advertise and support all speeds up to specified, and only one     */
6115 /* specified port type.                                                      */
6116 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6117                                 int maxspeed, int porttype)
6118 {
6119         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6120         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6121         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6122
6123         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6124         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6125
6126         switch (porttype) {
6127         case PORT_TP:
6128                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6129                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6130                 break;
6131         case PORT_FIBRE:
6132                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6133                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6134                 break;
6135         default:
6136                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6137                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6138                 WARN_ON_ONCE(1);
6139         }
6140
6141         /* fallthrough from high to low, to select all legal speeds: */
6142         switch (maxspeed) {
6143         case SPEED_10000:
6144                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6145                                                      10000baseT_Full);
6146                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6147                                                      10000baseT_Full);
6148         case SPEED_1000:
6149                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6150                                                      1000baseT_Full);
6151                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6152                                                      1000baseT_Full);
6153                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6154                                                      1000baseT_Half);
6155                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6156                                                      1000baseT_Half);
6157         case SPEED_100:
6158                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6159                                                      100baseT_Full);
6160                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6161                                                      100baseT_Full);
6162                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6163                                                      100baseT_Half);
6164                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6165                                                      100baseT_Half);
6166         case SPEED_10:
6167                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6168                                                      10baseT_Full);
6169                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6170                                                      10baseT_Full);
6171                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6172                                                      10baseT_Half);
6173                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6174                                                      10baseT_Half);
6175                 /* end fallthrough */
6176                 break;
6177         default:
6178                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6179                                                      10baseT_Full);
6180                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6181                                                      10baseT_Full);
6182                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6183                                                      10baseT_Half);
6184                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6185                                                      10baseT_Half);
6186                 WARN_ON_ONCE(1);
6187         }
6188 }
6189
6190 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6191                 struct ethtool_link_ksettings *cmd)
6192 {
6193         struct qeth_card *card = netdev->ml_priv;
6194         enum qeth_link_types link_type;
6195         struct carrier_info carrier_info;
6196         int rc;
6197
6198         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6199                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6200         else
6201                 link_type = card->info.link_type;
6202
6203         cmd->base.duplex = DUPLEX_FULL;
6204         cmd->base.autoneg = AUTONEG_ENABLE;
6205         cmd->base.phy_address = 0;
6206         cmd->base.mdio_support = 0;
6207         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6208         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6209
6210         switch (link_type) {
6211         case QETH_LINK_TYPE_FAST_ETH:
6212         case QETH_LINK_TYPE_LANE_ETH100:
6213                 cmd->base.speed = SPEED_100;
6214                 cmd->base.port = PORT_TP;
6215                 break;
6216         case QETH_LINK_TYPE_GBIT_ETH:
6217         case QETH_LINK_TYPE_LANE_ETH1000:
6218                 cmd->base.speed = SPEED_1000;
6219                 cmd->base.port = PORT_FIBRE;
6220                 break;
6221         case QETH_LINK_TYPE_10GBIT_ETH:
6222                 cmd->base.speed = SPEED_10000;
6223                 cmd->base.port = PORT_FIBRE;
6224                 break;
6225         default:
6226                 cmd->base.speed = SPEED_10;
6227                 cmd->base.port = PORT_TP;
6228         }
6229         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6230
6231         /* Check if we can obtain more accurate information.     */
6232         /* If QUERY_CARD_INFO command is not supported or fails, */
6233         /* just return the heuristics that was filled above.     */
6234         if (!qeth_card_hw_is_reachable(card))
6235                 return -ENODEV;
6236         rc = qeth_query_card_info(card, &carrier_info);
6237         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6238                 return 0;
6239         if (rc) /* report error from the hardware operation */
6240                 return rc;
6241         /* on success, fill in the information got from the hardware */
6242
6243         netdev_dbg(netdev,
6244         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6245                         carrier_info.card_type,
6246                         carrier_info.port_mode,
6247                         carrier_info.port_speed);
6248
6249         /* Update attributes for which we've obtained more authoritative */
6250         /* information, leave the rest the way they where filled above.  */
6251         switch (carrier_info.card_type) {
6252         case CARD_INFO_TYPE_1G_COPPER_A:
6253         case CARD_INFO_TYPE_1G_COPPER_B:
6254                 cmd->base.port = PORT_TP;
6255                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6256                 break;
6257         case CARD_INFO_TYPE_1G_FIBRE_A:
6258         case CARD_INFO_TYPE_1G_FIBRE_B:
6259                 cmd->base.port = PORT_FIBRE;
6260                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6261                 break;
6262         case CARD_INFO_TYPE_10G_FIBRE_A:
6263         case CARD_INFO_TYPE_10G_FIBRE_B:
6264                 cmd->base.port = PORT_FIBRE;
6265                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6266                 break;
6267         }
6268
6269         switch (carrier_info.port_mode) {
6270         case CARD_INFO_PORTM_FULLDUPLEX:
6271                 cmd->base.duplex = DUPLEX_FULL;
6272                 break;
6273         case CARD_INFO_PORTM_HALFDUPLEX:
6274                 cmd->base.duplex = DUPLEX_HALF;
6275                 break;
6276         }
6277
6278         switch (carrier_info.port_speed) {
6279         case CARD_INFO_PORTS_10M:
6280                 cmd->base.speed = SPEED_10;
6281                 break;
6282         case CARD_INFO_PORTS_100M:
6283                 cmd->base.speed = SPEED_100;
6284                 break;
6285         case CARD_INFO_PORTS_1G:
6286                 cmd->base.speed = SPEED_1000;
6287                 break;
6288         case CARD_INFO_PORTS_10G:
6289                 cmd->base.speed = SPEED_10000;
6290                 break;
6291         }
6292
6293         return 0;
6294 }
6295 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6296
6297 /* Callback to handle checksum offload command reply from OSA card.
6298  * Verify that required features have been enabled on the card.
6299  * Return error in hdr->return_code as this value is checked by caller.
6300  *
6301  * Always returns zero to indicate no further messages from the OSA card.
6302  */
6303 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6304                                         struct qeth_reply *reply,
6305                                         unsigned long data)
6306 {
6307         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6308         struct qeth_checksum_cmd *chksum_cb =
6309                                 (struct qeth_checksum_cmd *)reply->param;
6310
6311         QETH_CARD_TEXT(card, 4, "chkdoccb");
6312         if (qeth_setassparms_inspect_rc(cmd))
6313                 return 0;
6314
6315         memset(chksum_cb, 0, sizeof(*chksum_cb));
6316         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6317                 chksum_cb->supported =
6318                                 cmd->data.setassparms.data.chksum.supported;
6319                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6320         }
6321         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6322                 chksum_cb->supported =
6323                                 cmd->data.setassparms.data.chksum.supported;
6324                 chksum_cb->enabled =
6325                                 cmd->data.setassparms.data.chksum.enabled;
6326                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6327                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6328         }
6329         return 0;
6330 }
6331
6332 /* Send command to OSA card and check results. */
6333 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6334                                      enum qeth_ipa_funcs ipa_func,
6335                                      __u16 cmd_code, long data,
6336                                      struct qeth_checksum_cmd *chksum_cb,
6337                                      enum qeth_prot_versions prot)
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), prot);
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                                  enum qeth_prot_versions prot)
6354 {
6355         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6356         struct qeth_checksum_cmd chksum_cb;
6357         int rc;
6358
6359         if (prot == QETH_PROT_IPV4)
6360                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6361         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6362                                        &chksum_cb, prot);
6363         if (!rc) {
6364                 if ((required_features & chksum_cb.supported) !=
6365                     required_features)
6366                         rc = -EIO;
6367                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6368                          cstype == IPA_INBOUND_CHECKSUM)
6369                         dev_warn(&card->gdev->dev,
6370                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6371                                  QETH_CARD_IFNAME(card));
6372         }
6373         if (rc) {
6374                 qeth_send_simple_setassparms_prot(card, cstype,
6375                                                   IPA_CMD_ASS_STOP, 0, prot);
6376                 dev_warn(&card->gdev->dev,
6377                          "Starting HW IPv%d checksumming for %s failed, using SW checksumming\n",
6378                          prot, QETH_CARD_IFNAME(card));
6379                 return rc;
6380         }
6381         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6382                                        chksum_cb.supported, &chksum_cb,
6383                                        prot);
6384         if (!rc) {
6385                 if ((required_features & chksum_cb.enabled) !=
6386                     required_features)
6387                         rc = -EIO;
6388         }
6389         if (rc) {
6390                 qeth_send_simple_setassparms_prot(card, cstype,
6391                                                   IPA_CMD_ASS_STOP, 0, prot);
6392                 dev_warn(&card->gdev->dev,
6393                          "Enabling HW IPv%d checksumming for %s failed, using SW checksumming\n",
6394                          prot, QETH_CARD_IFNAME(card));
6395                 return rc;
6396         }
6397
6398         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6399                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6400         return 0;
6401 }
6402
6403 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6404                              enum qeth_prot_versions prot)
6405 {
6406         int rc = (on) ? qeth_send_checksum_on(card, cstype, prot)
6407                       : qeth_send_simple_setassparms_prot(card, cstype,
6408                                                           IPA_CMD_ASS_STOP, 0,
6409                                                           prot);
6410         return rc ? -EIO : 0;
6411 }
6412
6413 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6414 {
6415         int rc;
6416
6417         QETH_CARD_TEXT(card, 3, "sttso");
6418
6419         if (on) {
6420                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6421                                                   IPA_CMD_ASS_START, 0);
6422                 if (rc) {
6423                         dev_warn(&card->gdev->dev,
6424                                  "Starting outbound TCP segmentation offload for %s failed\n",
6425                                  QETH_CARD_IFNAME(card));
6426                         return -EIO;
6427                 }
6428                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6429         } else {
6430                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6431                                                   IPA_CMD_ASS_STOP, 0);
6432         }
6433         return rc;
6434 }
6435
6436 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6437 {
6438         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6439         int rc_ipv6;
6440
6441         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6442                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6443                                             QETH_PROT_IPV4);
6444         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6445                 /* no/one Offload Assist available, so the rc is trivial */
6446                 return rc_ipv4;
6447
6448         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6449                                     QETH_PROT_IPV6);
6450
6451         if (on)
6452                 /* enable: success if any Assist is active */
6453                 return (rc_ipv6) ? rc_ipv4 : 0;
6454
6455         /* disable: failure if any Assist is still active */
6456         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6457 }
6458
6459 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
6460                           NETIF_F_IPV6_CSUM)
6461 /**
6462  * qeth_recover_features() - Restore device features after recovery
6463  * @dev:        the recovering net_device
6464  *
6465  * Caller must hold rtnl lock.
6466  */
6467 void qeth_recover_features(struct net_device *dev)
6468 {
6469         netdev_features_t features = dev->features;
6470         struct qeth_card *card = dev->ml_priv;
6471
6472         /* force-off any feature that needs an IPA sequence.
6473          * netdev_update_features() will restart them.
6474          */
6475         dev->features &= ~QETH_HW_FEATURES;
6476         netdev_update_features(dev);
6477
6478         if (features == dev->features)
6479                 return;
6480         dev_warn(&card->gdev->dev,
6481                  "Device recovery failed to restore all offload features\n");
6482 }
6483 EXPORT_SYMBOL_GPL(qeth_recover_features);
6484
6485 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6486 {
6487         struct qeth_card *card = dev->ml_priv;
6488         netdev_features_t changed = dev->features ^ features;
6489         int rc = 0;
6490
6491         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6492         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6493
6494         if ((changed & NETIF_F_IP_CSUM)) {
6495                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6496                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6497                 if (rc)
6498                         changed ^= NETIF_F_IP_CSUM;
6499         }
6500         if (changed & NETIF_F_IPV6_CSUM) {
6501                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6502                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6503                 if (rc)
6504                         changed ^= NETIF_F_IPV6_CSUM;
6505         }
6506         if (changed & NETIF_F_RXCSUM) {
6507                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6508                 if (rc)
6509                         changed ^= NETIF_F_RXCSUM;
6510         }
6511         if ((changed & NETIF_F_TSO)) {
6512                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6513                 if (rc)
6514                         changed ^= NETIF_F_TSO;
6515         }
6516
6517         /* everything changed successfully? */
6518         if ((dev->features ^ features) == changed)
6519                 return 0;
6520         /* something went wrong. save changed features and return error */
6521         dev->features ^= changed;
6522         return -EIO;
6523 }
6524 EXPORT_SYMBOL_GPL(qeth_set_features);
6525
6526 netdev_features_t qeth_fix_features(struct net_device *dev,
6527                                     netdev_features_t features)
6528 {
6529         struct qeth_card *card = dev->ml_priv;
6530
6531         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6532         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6533                 features &= ~NETIF_F_IP_CSUM;
6534         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6535                 features &= ~NETIF_F_IPV6_CSUM;
6536         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6537             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6538                 features &= ~NETIF_F_RXCSUM;
6539         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6540                 features &= ~NETIF_F_TSO;
6541         /* if the card isn't up, remove features that require hw changes */
6542         if (card->state == CARD_STATE_DOWN ||
6543             card->state == CARD_STATE_RECOVER)
6544                 features &= ~QETH_HW_FEATURES;
6545         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6546         return features;
6547 }
6548 EXPORT_SYMBOL_GPL(qeth_fix_features);
6549
6550 netdev_features_t qeth_features_check(struct sk_buff *skb,
6551                                       struct net_device *dev,
6552                                       netdev_features_t features)
6553 {
6554         /* GSO segmentation builds skbs with
6555          *      a (small) linear part for the headers, and
6556          *      page frags for the data.
6557          * Compared to a linear skb, the header-only part consumes an
6558          * additional buffer element. This reduces buffer utilization, and
6559          * hurts throughput. So compress small segments into one element.
6560          */
6561         if (netif_needs_gso(skb, features)) {
6562                 /* match skb_segment(): */
6563                 unsigned int doffset = skb->data - skb_mac_header(skb);
6564                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6565                 unsigned int hroom = skb_headroom(skb);
6566
6567                 /* linearize only if resulting skb allocations are order-0: */
6568                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6569                         features &= ~NETIF_F_SG;
6570         }
6571
6572         return vlan_features_check(skb, features);
6573 }
6574 EXPORT_SYMBOL_GPL(qeth_features_check);
6575
6576 static int __init qeth_core_init(void)
6577 {
6578         int rc;
6579
6580         pr_info("loading core functions\n");
6581         INIT_LIST_HEAD(&qeth_core_card_list.list);
6582         INIT_LIST_HEAD(&qeth_dbf_list);
6583         rwlock_init(&qeth_core_card_list.rwlock);
6584         mutex_init(&qeth_mod_mutex);
6585
6586         qeth_wq = create_singlethread_workqueue("qeth_wq");
6587         if (!qeth_wq) {
6588                 rc = -ENOMEM;
6589                 goto out_err;
6590         }
6591
6592         rc = qeth_register_dbf_views();
6593         if (rc)
6594                 goto dbf_err;
6595         qeth_core_root_dev = root_device_register("qeth");
6596         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6597         if (rc)
6598                 goto register_err;
6599         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6600                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6601         if (!qeth_core_header_cache) {
6602                 rc = -ENOMEM;
6603                 goto slab_err;
6604         }
6605         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6606                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6607         if (!qeth_qdio_outbuf_cache) {
6608                 rc = -ENOMEM;
6609                 goto cqslab_err;
6610         }
6611         rc = ccw_driver_register(&qeth_ccw_driver);
6612         if (rc)
6613                 goto ccw_err;
6614         qeth_core_ccwgroup_driver.driver.groups = qeth_drv_attr_groups;
6615         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6616         if (rc)
6617                 goto ccwgroup_err;
6618
6619         return 0;
6620
6621 ccwgroup_err:
6622         ccw_driver_unregister(&qeth_ccw_driver);
6623 ccw_err:
6624         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6625 cqslab_err:
6626         kmem_cache_destroy(qeth_core_header_cache);
6627 slab_err:
6628         root_device_unregister(qeth_core_root_dev);
6629 register_err:
6630         qeth_unregister_dbf_views();
6631 dbf_err:
6632         destroy_workqueue(qeth_wq);
6633 out_err:
6634         pr_err("Initializing the qeth device driver failed\n");
6635         return rc;
6636 }
6637
6638 static void __exit qeth_core_exit(void)
6639 {
6640         qeth_clear_dbf_list();
6641         destroy_workqueue(qeth_wq);
6642         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6643         ccw_driver_unregister(&qeth_ccw_driver);
6644         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6645         kmem_cache_destroy(qeth_core_header_cache);
6646         root_device_unregister(qeth_core_root_dev);
6647         qeth_unregister_dbf_views();
6648         pr_info("core functions removed\n");
6649 }
6650
6651 module_init(qeth_core_init);
6652 module_exit(qeth_core_exit);
6653 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6654 MODULE_DESCRIPTION("qeth core functions");
6655 MODULE_LICENSE("GPL");