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 #include <linux/vmalloc.h>
  29
  30 #include <net/iucv/af_iucv.h>
  31 #include <net/dsfield.h>
  32
  33 #include <asm/ebcdic.h>
  34 #include <asm/chpid.h>
  35 #include <asm/io.h>
  36 #include <asm/sysinfo.h>
  37 #include <asm/diag.h>
  38 #include <asm/cio.h>
  39 #include <asm/ccwdev.h>
  40 #include <asm/cpcmd.h>
  41
  42 #include "qeth_core.h"
  43
  44 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  45         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  46         /*                   N  P  A    M  L  V                      H  */
  47         [QETH_DBF_SETUP] = {"qeth_setup",
  48                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  49         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  50                             &debug_sprintf_view, NULL},
  51         [QETH_DBF_CTRL]  = {"qeth_control",
  52                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  53 };
  54 EXPORT_SYMBOL_GPL(qeth_dbf);
  55
  56 struct qeth_card_list_struct qeth_core_card_list;
  57 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  58 struct kmem_cache *qeth_core_header_cache;
  59 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  60 static struct kmem_cache *qeth_qdio_outbuf_cache;
  61
  62 static struct device *qeth_core_root_dev;
  63 static struct lock_class_key qdio_out_skb_queue_key;
  64 static struct mutex qeth_mod_mutex;
  65
  66 static void qeth_send_control_data_cb(struct qeth_channel *,
  67                         struct qeth_cmd_buffer *);
  68 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  69 static void qeth_free_buffer_pool(struct qeth_card *);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_buffers(struct qeth_card *);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  77
  78 struct workqueue_struct *qeth_wq;
  79 EXPORT_SYMBOL_GPL(qeth_wq);
  80
  81 int qeth_card_hw_is_reachable(struct qeth_card *card)
  82 {
  83         return (card->state == CARD_STATE_SOFTSETUP) ||
  84                 (card->state == CARD_STATE_UP);
  85 }
  86 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  87
  88 static void qeth_close_dev_handler(struct work_struct *work)
  89 {
  90         struct qeth_card *card;
  91
  92         card = container_of(work, struct qeth_card, close_dev_work);
  93         QETH_CARD_TEXT(card, 2, "cldevhdl");
  94         rtnl_lock();
  95         dev_close(card->dev);
  96         rtnl_unlock();
  97         ccwgroup_set_offline(card->gdev);
  98 }
  99
 100 void qeth_close_dev(struct qeth_card *card)
 101 {
 102         QETH_CARD_TEXT(card, 2, "cldevsubm");
 103         queue_work(qeth_wq, &card->close_dev_work);
 104 }
 105 EXPORT_SYMBOL_GPL(qeth_close_dev);
 106
 107 static const char *qeth_get_cardname(struct qeth_card *card)
 108 {
 109         if (card->info.guestlan) {
 110                 switch (card->info.type) {
 111                 case QETH_CARD_TYPE_OSD:
 112                         return " Virtual NIC QDIO";
 113                 case QETH_CARD_TYPE_IQD:
 114                         return " Virtual NIC Hiper";
 115                 case QETH_CARD_TYPE_OSM:
 116                         return " Virtual NIC QDIO - OSM";
 117                 case QETH_CARD_TYPE_OSX:
 118                         return " Virtual NIC QDIO - OSX";
 119                 default:
 120                         return " unknown";
 121                 }
 122         } else {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         return " OSD Express";
 126                 case QETH_CARD_TYPE_IQD:
 127                         return " HiperSockets";
 128                 case QETH_CARD_TYPE_OSN:
 129                         return " OSN QDIO";
 130                 case QETH_CARD_TYPE_OSM:
 131                         return " OSM QDIO";
 132                 case QETH_CARD_TYPE_OSX:
 133                         return " OSX QDIO";
 134                 default:
 135                         return " unknown";
 136                 }
 137         }
 138         return " n/a";
 139 }
 140
 141 /* max length to be returned: 14 */
 142 const char *qeth_get_cardname_short(struct qeth_card *card)
 143 {
 144         if (card->info.guestlan) {
 145                 switch (card->info.type) {
 146                 case QETH_CARD_TYPE_OSD:
 147                         return "Virt.NIC QDIO";
 148                 case QETH_CARD_TYPE_IQD:
 149                         return "Virt.NIC Hiper";
 150                 case QETH_CARD_TYPE_OSM:
 151                         return "Virt.NIC OSM";
 152                 case QETH_CARD_TYPE_OSX:
 153                         return "Virt.NIC OSX";
 154                 default:
 155                         return "unknown";
 156                 }
 157         } else {
 158                 switch (card->info.type) {
 159                 case QETH_CARD_TYPE_OSD:
 160                         switch (card->info.link_type) {
 161                         case QETH_LINK_TYPE_FAST_ETH:
 162                                 return "OSD_100";
 163                         case QETH_LINK_TYPE_HSTR:
 164                                 return "HSTR";
 165                         case QETH_LINK_TYPE_GBIT_ETH:
 166                                 return "OSD_1000";
 167                         case QETH_LINK_TYPE_10GBIT_ETH:
 168                                 return "OSD_10GIG";
 169                         case QETH_LINK_TYPE_LANE_ETH100:
 170                                 return "OSD_FE_LANE";
 171                         case QETH_LINK_TYPE_LANE_TR:
 172                                 return "OSD_TR_LANE";
 173                         case QETH_LINK_TYPE_LANE_ETH1000:
 174                                 return "OSD_GbE_LANE";
 175                         case QETH_LINK_TYPE_LANE:
 176                                 return "OSD_ATM_LANE";
 177                         default:
 178                                 return "OSD_Express";
 179                         }
 180                 case QETH_CARD_TYPE_IQD:
 181                         return "HiperSockets";
 182                 case QETH_CARD_TYPE_OSN:
 183                         return "OSN";
 184                 case QETH_CARD_TYPE_OSM:
 185                         return "OSM_1000";
 186                 case QETH_CARD_TYPE_OSX:
 187                         return "OSX_10GIG";
 188                 default:
 189                         return "unknown";
 190                 }
 191         }
 192         return "n/a";
 193 }
 194
 195 void qeth_set_recovery_task(struct qeth_card *card)
 196 {
 197         card->recovery_task = current;
 198 }
 199 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 200
 201 void qeth_clear_recovery_task(struct qeth_card *card)
 202 {
 203         card->recovery_task = NULL;
 204 }
 205 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 206
 207 static bool qeth_is_recovery_task(const struct qeth_card *card)
 208 {
 209         return card->recovery_task == current;
 210 }
 211
 212 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 213                          int clear_start_mask)
 214 {
 215         unsigned long flags;
 216
 217         spin_lock_irqsave(&card->thread_mask_lock, flags);
 218         card->thread_allowed_mask = threads;
 219         if (clear_start_mask)
 220                 card->thread_start_mask &= threads;
 221         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 222         wake_up(&card->wait_q);
 223 }
 224 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 225
 226 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 227 {
 228         unsigned long flags;
 229         int rc = 0;
 230
 231         spin_lock_irqsave(&card->thread_mask_lock, flags);
 232         rc = (card->thread_running_mask & threads);
 233         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 234         return rc;
 235 }
 236 EXPORT_SYMBOL_GPL(qeth_threads_running);
 237
 238 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 239 {
 240         if (qeth_is_recovery_task(card))
 241                 return 0;
 242         return wait_event_interruptible(card->wait_q,
 243                         qeth_threads_running(card, threads) == 0);
 244 }
 245 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 246
 247 void qeth_clear_working_pool_list(struct qeth_card *card)
 248 {
 249         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 250
 251         QETH_CARD_TEXT(card, 5, "clwrklst");
 252         list_for_each_entry_safe(pool_entry, tmp,
 253                             &card->qdio.in_buf_pool.entry_list, list){
 254                         list_del(&pool_entry->list);
 255         }
 256 }
 257 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 258
 259 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 260 {
 261         struct qeth_buffer_pool_entry *pool_entry;
 262         void *ptr;
 263         int i, j;
 264
 265         QETH_CARD_TEXT(card, 5, "alocpool");
 266         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 267                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 268                 if (!pool_entry) {
 269                         qeth_free_buffer_pool(card);
 270                         return -ENOMEM;
 271                 }
 272                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 273                         ptr = (void *) __get_free_page(GFP_KERNEL);
 274                         if (!ptr) {
 275                                 while (j > 0)
 276                                         free_page((unsigned long)
 277                                                   pool_entry->elements[--j]);
 278                                 kfree(pool_entry);
 279                                 qeth_free_buffer_pool(card);
 280                                 return -ENOMEM;
 281                         }
 282                         pool_entry->elements[j] = ptr;
 283                 }
 284                 list_add(&pool_entry->init_list,
 285                          &card->qdio.init_pool.entry_list);
 286         }
 287         return 0;
 288 }
 289
 290 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 291 {
 292         QETH_CARD_TEXT(card, 2, "realcbp");
 293
 294         if ((card->state != CARD_STATE_DOWN) &&
 295             (card->state != CARD_STATE_RECOVER))
 296                 return -EPERM;
 297
 298         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 299         qeth_clear_working_pool_list(card);
 300         qeth_free_buffer_pool(card);
 301         card->qdio.in_buf_pool.buf_count = bufcnt;
 302         card->qdio.init_pool.buf_count = bufcnt;
 303         return qeth_alloc_buffer_pool(card);
 304 }
 305 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 306
 307 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 308 {
 309         if (!q)
 310                 return;
 311
 312         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 313         kfree(q);
 314 }
 315
 316 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 317 {
 318         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 319         int i;
 320
 321         if (!q)
 322                 return NULL;
 323
 324         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 325                 kfree(q);
 326                 return NULL;
 327         }
 328
 329         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 330                 q->bufs[i].buffer = q->qdio_bufs[i];
 331
 332         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 333         return q;
 334 }
 335
 336 static int qeth_cq_init(struct qeth_card *card)
 337 {
 338         int rc;
 339
 340         if (card->options.cq == QETH_CQ_ENABLED) {
 341                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 342                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 343                                    QDIO_MAX_BUFFERS_PER_Q);
 344                 card->qdio.c_q->next_buf_to_init = 127;
 345                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 346                              card->qdio.no_in_queues - 1, 0,
 347                              127);
 348                 if (rc) {
 349                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 350                         goto out;
 351                 }
 352         }
 353         rc = 0;
 354 out:
 355         return rc;
 356 }
 357
 358 static int qeth_alloc_cq(struct qeth_card *card)
 359 {
 360         int rc;
 361
 362         if (card->options.cq == QETH_CQ_ENABLED) {
 363                 int i;
 364                 struct qdio_outbuf_state *outbuf_states;
 365
 366                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 367                 card->qdio.c_q = qeth_alloc_qdio_queue();
 368                 if (!card->qdio.c_q) {
 369                         rc = -1;
 370                         goto kmsg_out;
 371                 }
 372                 card->qdio.no_in_queues = 2;
 373                 card->qdio.out_bufstates =
 374                         kcalloc(card->qdio.no_out_queues *
 375                                         QDIO_MAX_BUFFERS_PER_Q,
 376                                 sizeof(struct qdio_outbuf_state),
 377                                 GFP_KERNEL);
 378                 outbuf_states = card->qdio.out_bufstates;
 379                 if (outbuf_states == NULL) {
 380                         rc = -1;
 381                         goto free_cq_out;
 382                 }
 383                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 384                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 385                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 386                 }
 387         } else {
 388                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 389                 card->qdio.c_q = NULL;
 390                 card->qdio.no_in_queues = 1;
 391         }
 392         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 393         rc = 0;
 394 out:
 395         return rc;
 396 free_cq_out:
 397         qeth_free_qdio_queue(card->qdio.c_q);
 398         card->qdio.c_q = NULL;
 399 kmsg_out:
 400         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 401         goto out;
 402 }
 403
 404 static void qeth_free_cq(struct qeth_card *card)
 405 {
 406         if (card->qdio.c_q) {
 407                 --card->qdio.no_in_queues;
 408                 qeth_free_qdio_queue(card->qdio.c_q);
 409                 card->qdio.c_q = NULL;
 410         }
 411         kfree(card->qdio.out_bufstates);
 412         card->qdio.out_bufstates = NULL;
 413 }
 414
 415 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 416                                                         int delayed)
 417 {
 418         enum iucv_tx_notify n;
 419
 420         switch (sbalf15) {
 421         case 0:
 422                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 423                 break;
 424         case 4:
 425         case 16:
 426         case 17:
 427         case 18:
 428                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 429                         TX_NOTIFY_UNREACHABLE;
 430                 break;
 431         default:
 432                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 433                         TX_NOTIFY_GENERALERROR;
 434                 break;
 435         }
 436
 437         return n;
 438 }
 439
 440 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 441                                          int forced_cleanup)
 442 {
 443         if (q->card->options.cq != QETH_CQ_ENABLED)
 444                 return;
 445
 446         if (q->bufs[bidx]->next_pending != NULL) {
 447                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 448                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 449
 450                 while (c) {
 451                         if (forced_cleanup ||
 452                             atomic_read(&c->state) ==
 453                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 454                                 struct qeth_qdio_out_buffer *f = c;
 455                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 456                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 457                                 /* release here to avoid interleaving between
 458                                    outbound tasklet and inbound tasklet
 459                                    regarding notifications and lifecycle */
 460                                 qeth_release_skbs(c);
 461
 462                                 c = f->next_pending;
 463                                 WARN_ON_ONCE(head->next_pending != f);
 464                                 head->next_pending = c;
 465                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 466                         } else {
 467                                 head = c;
 468                                 c = c->next_pending;
 469                         }
 470
 471                 }
 472         }
 473 }
 474
 475
 476 static void qeth_qdio_handle_aob(struct qeth_card *card,
 477                                  unsigned long phys_aob_addr)
 478 {
 479         struct qaob *aob;
 480         struct qeth_qdio_out_buffer *buffer;
 481         enum iucv_tx_notify notification;
 482         unsigned int i;
 483
 484         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 485         QETH_CARD_TEXT(card, 5, "haob");
 486         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 487         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 488         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 489
 490         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 491                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 492                 notification = TX_NOTIFY_OK;
 493         } else {
 494                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 495                                                         QETH_QDIO_BUF_PENDING);
 496                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 497                 notification = TX_NOTIFY_DELAYED_OK;
 498         }
 499
 500         if (aob->aorc != 0)  {
 501                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 502                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 503         }
 504         qeth_notify_skbs(buffer->q, buffer, notification);
 505
 506         /* Free dangling allocations. The attached skbs are handled by
 507          * qeth_cleanup_handled_pending().
 508          */
 509         for (i = 0;
 510              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 511              i++) {
 512                 if (aob->sba[i] && buffer->is_header[i])
 513                         kmem_cache_free(qeth_core_header_cache,
 514                                         (void *) aob->sba[i]);
 515         }
 516         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 517
 518         qdio_release_aob(aob);
 519 }
 520
 521 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 522 {
 523         return card->options.cq == QETH_CQ_ENABLED &&
 524             card->qdio.c_q != NULL &&
 525             queue != 0 &&
 526             queue == card->qdio.no_in_queues - 1;
 527 }
 528
 529 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
 530 {
 531         ccw->cmd_code = cmd_code;
 532         ccw->flags = CCW_FLAG_SLI;
 533         ccw->count = len;
 534         ccw->cda = (__u32) __pa(data);
 535 }
 536
 537 static int __qeth_issue_next_read(struct qeth_card *card)
 538 {
 539         struct qeth_channel *channel = &card->read;
 540         struct qeth_cmd_buffer *iob;
 541         int rc;
 542
 543         QETH_CARD_TEXT(card, 5, "issnxrd");
 544         if (channel->state != CH_STATE_UP)
 545                 return -EIO;
 546         iob = qeth_get_buffer(channel);
 547         if (!iob) {
 548                 dev_warn(&card->gdev->dev, "The qeth device driver "
 549                         "failed to recover an error on the device\n");
 550                 QETH_DBF_MESSAGE(2, "%s issue_next_read failed: no iob "
 551                         "available\n", dev_name(&card->gdev->dev));
 552                 return -ENOMEM;
 553         }
 554         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 555         QETH_CARD_TEXT(card, 6, "noirqpnd");
 556         rc = ccw_device_start(channel->ccwdev, channel->ccw,
 557                               (addr_t) iob, 0, 0);
 558         if (rc) {
 559                 QETH_DBF_MESSAGE(2, "%s error in starting next read ccw! "
 560                         "rc=%i\n", dev_name(&card->gdev->dev), rc);
 561                 atomic_set(&channel->irq_pending, 0);
 562                 qeth_release_buffer(channel, iob);
 563                 card->read_or_write_problem = 1;
 564                 qeth_schedule_recovery(card);
 565                 wake_up(&card->wait_q);
 566         }
 567         return rc;
 568 }
 569
 570 static int qeth_issue_next_read(struct qeth_card *card)
 571 {
 572         int ret;
 573
 574         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 575         ret = __qeth_issue_next_read(card);
 576         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 577
 578         return ret;
 579 }
 580
 581 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 582 {
 583         struct qeth_reply *reply;
 584
 585         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 586         if (reply) {
 587                 refcount_set(&reply->refcnt, 1);
 588                 atomic_set(&reply->received, 0);
 589                 reply->card = card;
 590         }
 591         return reply;
 592 }
 593
 594 static void qeth_get_reply(struct qeth_reply *reply)
 595 {
 596         refcount_inc(&reply->refcnt);
 597 }
 598
 599 static void qeth_put_reply(struct qeth_reply *reply)
 600 {
 601         if (refcount_dec_and_test(&reply->refcnt))
 602                 kfree(reply);
 603 }
 604
 605 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 606                 struct qeth_card *card)
 607 {
 608         const char *ipa_name;
 609         int com = cmd->hdr.command;
 610         ipa_name = qeth_get_ipa_cmd_name(com);
 611         if (rc)
 612                 QETH_DBF_MESSAGE(2, "IPA: %s(x%X) for %s/%s returned "
 613                                 "x%X \"%s\"\n",
 614                                 ipa_name, com, dev_name(&card->gdev->dev),
 615                                 QETH_CARD_IFNAME(card), rc,
 616                                 qeth_get_ipa_msg(rc));
 617         else
 618                 QETH_DBF_MESSAGE(5, "IPA: %s(x%X) for %s/%s succeeded\n",
 619                                 ipa_name, com, dev_name(&card->gdev->dev),
 620                                 QETH_CARD_IFNAME(card));
 621 }
 622
 623 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 624                 struct qeth_cmd_buffer *iob)
 625 {
 626         struct qeth_ipa_cmd *cmd = NULL;
 627
 628         QETH_CARD_TEXT(card, 5, "chkipad");
 629         if (IS_IPA(iob->data)) {
 630                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 631                 if (IS_IPA_REPLY(cmd)) {
 632                         if (cmd->hdr.command != IPA_CMD_SETCCID &&
 633                             cmd->hdr.command != IPA_CMD_DELCCID &&
 634                             cmd->hdr.command != IPA_CMD_MODCCID &&
 635                             cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 636                                 qeth_issue_ipa_msg(cmd,
 637                                                 cmd->hdr.return_code, card);
 638                         return cmd;
 639                 } else {
 640                         switch (cmd->hdr.command) {
 641                         case IPA_CMD_STOPLAN:
 642                                 if (cmd->hdr.return_code ==
 643                                                 IPA_RC_VEPA_TO_VEB_TRANSITION) {
 644                                         dev_err(&card->gdev->dev,
 645                                            "Interface %s is down because the "
 646                                            "adjacent port is no longer in "
 647                                            "reflective relay mode\n",
 648                                            QETH_CARD_IFNAME(card));
 649                                         qeth_close_dev(card);
 650                                 } else {
 651                                         dev_warn(&card->gdev->dev,
 652                                            "The link for interface %s on CHPID"
 653                                            " 0x%X failed\n",
 654                                            QETH_CARD_IFNAME(card),
 655                                            card->info.chpid);
 656                                         qeth_issue_ipa_msg(cmd,
 657                                                 cmd->hdr.return_code, card);
 658                                 }
 659                                 card->lan_online = 0;
 660                                 netif_carrier_off(card->dev);
 661                                 return NULL;
 662                         case IPA_CMD_STARTLAN:
 663                                 dev_info(&card->gdev->dev,
 664                                            "The link for %s on CHPID 0x%X has"
 665                                            " been restored\n",
 666                                            QETH_CARD_IFNAME(card),
 667                                            card->info.chpid);
 668                                 netif_carrier_on(card->dev);
 669                                 card->lan_online = 1;
 670                                 if (card->info.hwtrap)
 671                                         card->info.hwtrap = 2;
 672                                 qeth_schedule_recovery(card);
 673                                 return NULL;
 674                         case IPA_CMD_SETBRIDGEPORT_IQD:
 675                         case IPA_CMD_SETBRIDGEPORT_OSA:
 676                         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 677                                 if (card->discipline->control_event_handler
 678                                                                 (card, cmd))
 679                                         return cmd;
 680                                 else
 681                                         return NULL;
 682                         case IPA_CMD_MODCCID:
 683                                 return cmd;
 684                         case IPA_CMD_REGISTER_LOCAL_ADDR:
 685                                 QETH_CARD_TEXT(card, 3, "irla");
 686                                 break;
 687                         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 688                                 QETH_CARD_TEXT(card, 3, "urla");
 689                                 break;
 690                         default:
 691                                 QETH_DBF_MESSAGE(2, "Received data is IPA "
 692                                            "but not a reply!\n");
 693                                 break;
 694                         }
 695                 }
 696         }
 697         return cmd;
 698 }
 699
 700 void qeth_clear_ipacmd_list(struct qeth_card *card)
 701 {
 702         struct qeth_reply *reply, *r;
 703         unsigned long flags;
 704
 705         QETH_CARD_TEXT(card, 4, "clipalst");
 706
 707         spin_lock_irqsave(&card->lock, flags);
 708         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 709                 qeth_get_reply(reply);
 710                 reply->rc = -EIO;
 711                 atomic_inc(&reply->received);
 712                 list_del_init(&reply->list);
 713                 wake_up(&reply->wait_q);
 714                 qeth_put_reply(reply);
 715         }
 716         spin_unlock_irqrestore(&card->lock, flags);
 717 }
 718 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 719
 720 static int qeth_check_idx_response(struct qeth_card *card,
 721         unsigned char *buffer)
 722 {
 723         if (!buffer)
 724                 return 0;
 725
 726         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 727         if ((buffer[2] & 0xc0) == 0xc0) {
 728                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#02x\n",
 729                                  buffer[4]);
 730                 QETH_CARD_TEXT(card, 2, "ckidxres");
 731                 QETH_CARD_TEXT(card, 2, " idxterm");
 732                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 733                 if (buffer[4] == 0xf6) {
 734                         dev_err(&card->gdev->dev,
 735                         "The qeth device is not configured "
 736                         "for the OSI layer required by z/VM\n");
 737                         return -EPERM;
 738                 }
 739                 return -EIO;
 740         }
 741         return 0;
 742 }
 743
 744 static struct qeth_card *CARD_FROM_CDEV(struct ccw_device *cdev)
 745 {
 746         struct qeth_card *card = dev_get_drvdata(&((struct ccwgroup_device *)
 747                 dev_get_drvdata(&cdev->dev))->dev);
 748         return card;
 749 }
 750
 751 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 752 {
 753         __u8 index;
 754
 755         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "getbuff");
 756         index = channel->io_buf_no;
 757         do {
 758                 if (channel->iob[index].state == BUF_STATE_FREE) {
 759                         channel->iob[index].state = BUF_STATE_LOCKED;
 760                         channel->io_buf_no = (channel->io_buf_no + 1) %
 761                                 QETH_CMD_BUFFER_NO;
 762                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 763                         return channel->iob + index;
 764                 }
 765                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 766         } while (index != channel->io_buf_no);
 767
 768         return NULL;
 769 }
 770
 771 void qeth_release_buffer(struct qeth_channel *channel,
 772                 struct qeth_cmd_buffer *iob)
 773 {
 774         unsigned long flags;
 775
 776         QETH_CARD_TEXT(CARD_FROM_CDEV(channel->ccwdev), 6, "relbuff");
 777         spin_lock_irqsave(&channel->iob_lock, flags);
 778         memset(iob->data, 0, QETH_BUFSIZE);
 779         iob->state = BUF_STATE_FREE;
 780         iob->callback = qeth_send_control_data_cb;
 781         iob->rc = 0;
 782         spin_unlock_irqrestore(&channel->iob_lock, flags);
 783         wake_up(&channel->wait_q);
 784 }
 785 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 786
 787 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 788 {
 789         struct qeth_cmd_buffer *buffer = NULL;
 790         unsigned long flags;
 791
 792         spin_lock_irqsave(&channel->iob_lock, flags);
 793         buffer = __qeth_get_buffer(channel);
 794         spin_unlock_irqrestore(&channel->iob_lock, flags);
 795         return buffer;
 796 }
 797
 798 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 799 {
 800         struct qeth_cmd_buffer *buffer;
 801         wait_event(channel->wait_q,
 802                    ((buffer = qeth_get_buffer(channel)) != NULL));
 803         return buffer;
 804 }
 805 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 806
 807 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 808 {
 809         int cnt;
 810
 811         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 812                 qeth_release_buffer(channel, &channel->iob[cnt]);
 813         channel->io_buf_no = 0;
 814 }
 815 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 816
 817 static void qeth_send_control_data_cb(struct qeth_channel *channel,
 818                   struct qeth_cmd_buffer *iob)
 819 {
 820         struct qeth_card *card;
 821         struct qeth_reply *reply, *r;
 822         struct qeth_ipa_cmd *cmd;
 823         unsigned long flags;
 824         int keep_reply;
 825         int rc = 0;
 826
 827         card = CARD_FROM_CDEV(channel->ccwdev);
 828         QETH_CARD_TEXT(card, 4, "sndctlcb");
 829         rc = qeth_check_idx_response(card, iob->data);
 830         switch (rc) {
 831         case 0:
 832                 break;
 833         case -EIO:
 834                 qeth_clear_ipacmd_list(card);
 835                 qeth_schedule_recovery(card);
 836                 /* fall through */
 837         default:
 838                 goto out;
 839         }
 840
 841         cmd = qeth_check_ipa_data(card, iob);
 842         if ((cmd == NULL) && (card->state != CARD_STATE_DOWN))
 843                 goto out;
 844         /*in case of OSN : check if cmd is set */
 845         if (card->info.type == QETH_CARD_TYPE_OSN &&
 846             cmd &&
 847             cmd->hdr.command != IPA_CMD_STARTLAN &&
 848             card->osn_info.assist_cb != NULL) {
 849                 card->osn_info.assist_cb(card->dev, cmd);
 850                 goto out;
 851         }
 852
 853         spin_lock_irqsave(&card->lock, flags);
 854         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 855                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 856                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 857                         qeth_get_reply(reply);
 858                         list_del_init(&reply->list);
 859                         spin_unlock_irqrestore(&card->lock, flags);
 860                         keep_reply = 0;
 861                         if (reply->callback != NULL) {
 862                                 if (cmd) {
 863                                         reply->offset = (__u16)((char *)cmd -
 864                                                         (char *)iob->data);
 865                                         keep_reply = reply->callback(card,
 866                                                         reply,
 867                                                         (unsigned long)cmd);
 868                                 } else
 869                                         keep_reply = reply->callback(card,
 870                                                         reply,
 871                                                         (unsigned long)iob);
 872                         }
 873                         if (cmd)
 874                                 reply->rc = (u16) cmd->hdr.return_code;
 875                         else if (iob->rc)
 876                                 reply->rc = iob->rc;
 877                         if (keep_reply) {
 878                                 spin_lock_irqsave(&card->lock, flags);
 879                                 list_add_tail(&reply->list,
 880                                               &card->cmd_waiter_list);
 881                                 spin_unlock_irqrestore(&card->lock, flags);
 882                         } else {
 883                                 atomic_inc(&reply->received);
 884                                 wake_up(&reply->wait_q);
 885                         }
 886                         qeth_put_reply(reply);
 887                         goto out;
 888                 }
 889         }
 890         spin_unlock_irqrestore(&card->lock, flags);
 891 out:
 892         memcpy(&card->seqno.pdu_hdr_ack,
 893                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 894                 QETH_SEQ_NO_LENGTH);
 895         qeth_release_buffer(channel, iob);
 896 }
 897
 898 static int qeth_set_thread_start_bit(struct qeth_card *card,
 899                 unsigned long thread)
 900 {
 901         unsigned long flags;
 902
 903         spin_lock_irqsave(&card->thread_mask_lock, flags);
 904         if (!(card->thread_allowed_mask & thread) ||
 905               (card->thread_start_mask & thread)) {
 906                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 907                 return -EPERM;
 908         }
 909         card->thread_start_mask |= thread;
 910         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 911         return 0;
 912 }
 913
 914 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 915 {
 916         unsigned long flags;
 917
 918         spin_lock_irqsave(&card->thread_mask_lock, flags);
 919         card->thread_start_mask &= ~thread;
 920         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 921         wake_up(&card->wait_q);
 922 }
 923 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 924
 925 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 926 {
 927         unsigned long flags;
 928
 929         spin_lock_irqsave(&card->thread_mask_lock, flags);
 930         card->thread_running_mask &= ~thread;
 931         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 932         wake_up_all(&card->wait_q);
 933 }
 934 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 935
 936 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 937 {
 938         unsigned long flags;
 939         int rc = 0;
 940
 941         spin_lock_irqsave(&card->thread_mask_lock, flags);
 942         if (card->thread_start_mask & thread) {
 943                 if ((card->thread_allowed_mask & thread) &&
 944                     !(card->thread_running_mask & thread)) {
 945                         rc = 1;
 946                         card->thread_start_mask &= ~thread;
 947                         card->thread_running_mask |= thread;
 948                 } else
 949                         rc = -EPERM;
 950         }
 951         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 952         return rc;
 953 }
 954
 955 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 956 {
 957         int rc = 0;
 958
 959         wait_event(card->wait_q,
 960                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 961         return rc;
 962 }
 963 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 964
 965 void qeth_schedule_recovery(struct qeth_card *card)
 966 {
 967         QETH_CARD_TEXT(card, 2, "startrec");
 968         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 969                 schedule_work(&card->kernel_thread_starter);
 970 }
 971 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 972
 973 static int qeth_get_problem(struct ccw_device *cdev, struct irb *irb)
 974 {
 975         int dstat, cstat;
 976         char *sense;
 977         struct qeth_card *card;
 978
 979         sense = (char *) irb->ecw;
 980         cstat = irb->scsw.cmd.cstat;
 981         dstat = irb->scsw.cmd.dstat;
 982         card = CARD_FROM_CDEV(cdev);
 983
 984         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 985                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 986                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 987                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 988                 dev_warn(&cdev->dev, "The qeth device driver "
 989                         "failed to recover an error on the device\n");
 990                 QETH_DBF_MESSAGE(2, "%s check on device dstat=x%x, cstat=x%x\n",
 991                         dev_name(&cdev->dev), dstat, cstat);
 992                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 993                                 16, 1, irb, 64, 1);
 994                 return 1;
 995         }
 996
 997         if (dstat & DEV_STAT_UNIT_CHECK) {
 998                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 999                     SENSE_RESETTING_EVENT_FLAG) {
1000                         QETH_CARD_TEXT(card, 2, "REVIND");
1001                         return 1;
1002                 }
1003                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1004                     SENSE_COMMAND_REJECT_FLAG) {
1005                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1006                         return 1;
1007                 }
1008                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1009                         QETH_CARD_TEXT(card, 2, "AFFE");
1010                         return 1;
1011                 }
1012                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1013                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1014                         return 0;
1015                 }
1016                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1017                         return 1;
1018         }
1019         return 0;
1020 }
1021
1022 static long __qeth_check_irb_error(struct ccw_device *cdev,
1023                 unsigned long intparm, struct irb *irb)
1024 {
1025         struct qeth_card *card;
1026
1027         card = CARD_FROM_CDEV(cdev);
1028
1029         if (!card || !IS_ERR(irb))
1030                 return 0;
1031
1032         switch (PTR_ERR(irb)) {
1033         case -EIO:
1034                 QETH_DBF_MESSAGE(2, "%s i/o-error on device\n",
1035                         dev_name(&cdev->dev));
1036                 QETH_CARD_TEXT(card, 2, "ckirberr");
1037                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1038                 break;
1039         case -ETIMEDOUT:
1040                 dev_warn(&cdev->dev, "A hardware operation timed out"
1041                         " on the device\n");
1042                 QETH_CARD_TEXT(card, 2, "ckirberr");
1043                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1044                 if (intparm == QETH_RCD_PARM) {
1045                         if (card->data.ccwdev == cdev) {
1046                                 card->data.state = CH_STATE_DOWN;
1047                                 wake_up(&card->wait_q);
1048                         }
1049                 }
1050                 break;
1051         default:
1052                 QETH_DBF_MESSAGE(2, "%s unknown error %ld on device\n",
1053                         dev_name(&cdev->dev), PTR_ERR(irb));
1054                 QETH_CARD_TEXT(card, 2, "ckirberr");
1055                 QETH_CARD_TEXT(card, 2, "  rc???");
1056         }
1057         return PTR_ERR(irb);
1058 }
1059
1060 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1061                 struct irb *irb)
1062 {
1063         int rc;
1064         int cstat, dstat;
1065         struct qeth_cmd_buffer *iob = NULL;
1066         struct qeth_channel *channel;
1067         struct qeth_card *card;
1068
1069         card = CARD_FROM_CDEV(cdev);
1070         if (!card)
1071                 return;
1072
1073         QETH_CARD_TEXT(card, 5, "irq");
1074
1075         if (card->read.ccwdev == cdev) {
1076                 channel = &card->read;
1077                 QETH_CARD_TEXT(card, 5, "read");
1078         } else if (card->write.ccwdev == cdev) {
1079                 channel = &card->write;
1080                 QETH_CARD_TEXT(card, 5, "write");
1081         } else {
1082                 channel = &card->data;
1083                 QETH_CARD_TEXT(card, 5, "data");
1084         }
1085
1086         if (qeth_intparm_is_iob(intparm))
1087                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1088
1089         if (__qeth_check_irb_error(cdev, intparm, irb)) {
1090                 /* IO was terminated, free its resources. */
1091                 if (iob)
1092                         qeth_release_buffer(iob->channel, iob);
1093                 atomic_set(&channel->irq_pending, 0);
1094                 wake_up(&card->wait_q);
1095                 return;
1096         }
1097
1098         atomic_set(&channel->irq_pending, 0);
1099
1100         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1101                 channel->state = CH_STATE_STOPPED;
1102
1103         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1104                 channel->state = CH_STATE_HALTED;
1105
1106         /*let's wake up immediately on data channel*/
1107         if ((channel == &card->data) && (intparm != 0) &&
1108             (intparm != QETH_RCD_PARM))
1109                 goto out;
1110
1111         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1112                 QETH_CARD_TEXT(card, 6, "clrchpar");
1113                 /* we don't have to handle this further */
1114                 intparm = 0;
1115         }
1116         if (intparm == QETH_HALT_CHANNEL_PARM) {
1117                 QETH_CARD_TEXT(card, 6, "hltchpar");
1118                 /* we don't have to handle this further */
1119                 intparm = 0;
1120         }
1121
1122         cstat = irb->scsw.cmd.cstat;
1123         dstat = irb->scsw.cmd.dstat;
1124
1125         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1126             (dstat & DEV_STAT_UNIT_CHECK) ||
1127             (cstat)) {
1128                 if (irb->esw.esw0.erw.cons) {
1129                         dev_warn(&channel->ccwdev->dev,
1130                                 "The qeth device driver failed to recover "
1131                                 "an error on the device\n");
1132                         QETH_DBF_MESSAGE(2, "%s sense data available. cstat "
1133                                 "0x%X dstat 0x%X\n",
1134                                 dev_name(&channel->ccwdev->dev), cstat, dstat);
1135                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1136                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1137                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1138                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1139                 }
1140                 if (intparm == QETH_RCD_PARM) {
1141                         channel->state = CH_STATE_DOWN;
1142                         goto out;
1143                 }
1144                 rc = qeth_get_problem(cdev, irb);
1145                 if (rc) {
1146                         card->read_or_write_problem = 1;
1147                         if (iob)
1148                                 qeth_release_buffer(iob->channel, iob);
1149                         qeth_clear_ipacmd_list(card);
1150                         qeth_schedule_recovery(card);
1151                         goto out;
1152                 }
1153         }
1154
1155         if (intparm == QETH_RCD_PARM) {
1156                 channel->state = CH_STATE_RCD_DONE;
1157                 goto out;
1158         }
1159         if (channel == &card->data)
1160                 return;
1161         if (channel == &card->read &&
1162             channel->state == CH_STATE_UP)
1163                 __qeth_issue_next_read(card);
1164
1165         if (iob && iob->callback)
1166                 iob->callback(iob->channel, iob);
1167
1168 out:
1169         wake_up(&card->wait_q);
1170         return;
1171 }
1172
1173 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1174                 struct qeth_qdio_out_buffer *buf,
1175                 enum iucv_tx_notify notification)
1176 {
1177         struct sk_buff *skb;
1178
1179         if (skb_queue_empty(&buf->skb_list))
1180                 goto out;
1181         skb = skb_peek(&buf->skb_list);
1182         while (skb) {
1183                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1184                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1185                 if (be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1186                         if (skb->sk) {
1187                                 struct iucv_sock *iucv = iucv_sk(skb->sk);
1188                                 iucv->sk_txnotify(skb, notification);
1189                         }
1190                 }
1191                 if (skb_queue_is_last(&buf->skb_list, skb))
1192                         skb = NULL;
1193                 else
1194                         skb = skb_queue_next(&buf->skb_list, skb);
1195         }
1196 out:
1197         return;
1198 }
1199
1200 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1201 {
1202         struct sk_buff *skb;
1203         struct iucv_sock *iucv;
1204         int notify_general_error = 0;
1205
1206         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1207                 notify_general_error = 1;
1208
1209         /* release may never happen from within CQ tasklet scope */
1210         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1211
1212         skb = skb_dequeue(&buf->skb_list);
1213         while (skb) {
1214                 QETH_CARD_TEXT(buf->q->card, 5, "skbr");
1215                 QETH_CARD_TEXT_(buf->q->card, 5, "%lx", (long) skb);
1216                 if (notify_general_error &&
1217                     be16_to_cpu(skb->protocol) == ETH_P_AF_IUCV) {
1218                         if (skb->sk) {
1219                                 iucv = iucv_sk(skb->sk);
1220                                 iucv->sk_txnotify(skb, TX_NOTIFY_GENERALERROR);
1221                         }
1222                 }
1223                 refcount_dec(&skb->users);
1224                 dev_kfree_skb_any(skb);
1225                 skb = skb_dequeue(&buf->skb_list);
1226         }
1227 }
1228
1229 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1230                                      struct qeth_qdio_out_buffer *buf)
1231 {
1232         int i;
1233
1234         /* is PCI flag set on buffer? */
1235         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1236                 atomic_dec(&queue->set_pci_flags_count);
1237
1238         qeth_release_skbs(buf);
1239
1240         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1241                 if (buf->buffer->element[i].addr && buf->is_header[i])
1242                         kmem_cache_free(qeth_core_header_cache,
1243                                 buf->buffer->element[i].addr);
1244                 buf->is_header[i] = 0;
1245         }
1246
1247         qeth_scrub_qdio_buffer(buf->buffer,
1248                                QETH_MAX_BUFFER_ELEMENTS(queue->card));
1249         buf->next_element_to_fill = 0;
1250         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1251 }
1252
1253 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1254 {
1255         int j;
1256
1257         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1258                 if (!q->bufs[j])
1259                         continue;
1260                 qeth_cleanup_handled_pending(q, j, 1);
1261                 qeth_clear_output_buffer(q, q->bufs[j]);
1262                 if (free) {
1263                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1264                         q->bufs[j] = NULL;
1265                 }
1266         }
1267 }
1268
1269 void qeth_clear_qdio_buffers(struct qeth_card *card)
1270 {
1271         int i;
1272
1273         QETH_CARD_TEXT(card, 2, "clearqdbf");
1274         /* clear outbound buffers to free skbs */
1275         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1276                 if (card->qdio.out_qs[i]) {
1277                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1278                 }
1279         }
1280 }
1281 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1282
1283 static void qeth_free_buffer_pool(struct qeth_card *card)
1284 {
1285         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1286         int i = 0;
1287         list_for_each_entry_safe(pool_entry, tmp,
1288                                  &card->qdio.init_pool.entry_list, init_list){
1289                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1290                         free_page((unsigned long)pool_entry->elements[i]);
1291                 list_del(&pool_entry->init_list);
1292                 kfree(pool_entry);
1293         }
1294 }
1295
1296 static void qeth_clean_channel(struct qeth_channel *channel)
1297 {
1298         struct ccw_device *cdev = channel->ccwdev;
1299         int cnt;
1300
1301         QETH_DBF_TEXT(SETUP, 2, "freech");
1302
1303         spin_lock_irq(get_ccwdev_lock(cdev));
1304         cdev->handler = NULL;
1305         spin_unlock_irq(get_ccwdev_lock(cdev));
1306
1307         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1308                 kfree(channel->iob[cnt].data);
1309         kfree(channel->ccw);
1310 }
1311
1312 static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
1313 {
1314         struct ccw_device *cdev = channel->ccwdev;
1315         int cnt;
1316
1317         QETH_DBF_TEXT(SETUP, 2, "setupch");
1318
1319         channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
1320         if (!channel->ccw)
1321                 return -ENOMEM;
1322         channel->state = CH_STATE_DOWN;
1323         atomic_set(&channel->irq_pending, 0);
1324         init_waitqueue_head(&channel->wait_q);
1325
1326         spin_lock_irq(get_ccwdev_lock(cdev));
1327         cdev->handler = qeth_irq;
1328         spin_unlock_irq(get_ccwdev_lock(cdev));
1329
1330         if (!alloc_buffers)
1331                 return 0;
1332
1333         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
1334                 channel->iob[cnt].data =
1335                         kzalloc(QETH_BUFSIZE, GFP_DMA|GFP_KERNEL);
1336                 if (channel->iob[cnt].data == NULL)
1337                         break;
1338                 channel->iob[cnt].state = BUF_STATE_FREE;
1339                 channel->iob[cnt].channel = channel;
1340                 channel->iob[cnt].callback = qeth_send_control_data_cb;
1341                 channel->iob[cnt].rc = 0;
1342         }
1343         if (cnt < QETH_CMD_BUFFER_NO) {
1344                 qeth_clean_channel(channel);
1345                 return -ENOMEM;
1346         }
1347         channel->io_buf_no = 0;
1348         spin_lock_init(&channel->iob_lock);
1349
1350         return 0;
1351 }
1352
1353 static void qeth_set_single_write_queues(struct qeth_card *card)
1354 {
1355         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1356             (card->qdio.no_out_queues == 4))
1357                 qeth_free_qdio_buffers(card);
1358
1359         card->qdio.no_out_queues = 1;
1360         if (card->qdio.default_out_queue != 0)
1361                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1362
1363         card->qdio.default_out_queue = 0;
1364 }
1365
1366 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1367 {
1368         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1369             (card->qdio.no_out_queues == 1)) {
1370                 qeth_free_qdio_buffers(card);
1371                 card->qdio.default_out_queue = 2;
1372         }
1373         card->qdio.no_out_queues = 4;
1374 }
1375
1376 static int qeth_update_from_chp_desc(struct qeth_card *card)
1377 {
1378         struct ccw_device *ccwdev;
1379         struct channel_path_desc_fmt0 *chp_dsc;
1380
1381         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1382
1383         ccwdev = card->data.ccwdev;
1384         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1385         if (!chp_dsc)
1386                 return -ENOMEM;
1387
1388         card->info.func_level = 0x4100 + chp_dsc->desc;
1389         if (card->info.type == QETH_CARD_TYPE_IQD)
1390                 goto out;
1391
1392         /* CHPP field bit 6 == 1 -> single queue */
1393         if ((chp_dsc->chpp & 0x02) == 0x02)
1394                 qeth_set_single_write_queues(card);
1395         else
1396                 qeth_set_multiple_write_queues(card);
1397 out:
1398         kfree(chp_dsc);
1399         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1400         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1401         return 0;
1402 }
1403
1404 static void qeth_init_qdio_info(struct qeth_card *card)
1405 {
1406         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1407         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1408         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1409         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1410         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1411
1412         /* inbound */
1413         card->qdio.no_in_queues = 1;
1414         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1415         if (card->info.type == QETH_CARD_TYPE_IQD)
1416                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1417         else
1418                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1419         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1420         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1421         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1422 }
1423
1424 static void qeth_set_initial_options(struct qeth_card *card)
1425 {
1426         card->options.route4.type = NO_ROUTER;
1427         card->options.route6.type = NO_ROUTER;
1428         card->options.rx_sg_cb = QETH_RX_SG_CB;
1429         card->options.isolation = ISOLATION_MODE_NONE;
1430         card->options.cq = QETH_CQ_DISABLED;
1431 }
1432
1433 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1434 {
1435         unsigned long flags;
1436         int rc = 0;
1437
1438         spin_lock_irqsave(&card->thread_mask_lock, flags);
1439         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1440                         (u8) card->thread_start_mask,
1441                         (u8) card->thread_allowed_mask,
1442                         (u8) card->thread_running_mask);
1443         rc = (card->thread_start_mask & thread);
1444         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1445         return rc;
1446 }
1447
1448 static void qeth_start_kernel_thread(struct work_struct *work)
1449 {
1450         struct task_struct *ts;
1451         struct qeth_card *card = container_of(work, struct qeth_card,
1452                                         kernel_thread_starter);
1453         QETH_CARD_TEXT(card , 2, "strthrd");
1454
1455         if (card->read.state != CH_STATE_UP &&
1456             card->write.state != CH_STATE_UP)
1457                 return;
1458         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1459                 ts = kthread_run(card->discipline->recover, (void *)card,
1460                                 "qeth_recover");
1461                 if (IS_ERR(ts)) {
1462                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1463                         qeth_clear_thread_running_bit(card,
1464                                 QETH_RECOVER_THREAD);
1465                 }
1466         }
1467 }
1468
1469 static void qeth_buffer_reclaim_work(struct work_struct *);
1470 static void qeth_setup_card(struct qeth_card *card)
1471 {
1472         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1473         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1474
1475         card->info.type = CARD_RDEV(card)->id.driver_info;
1476         card->state = CARD_STATE_DOWN;
1477         spin_lock_init(&card->mclock);
1478         spin_lock_init(&card->lock);
1479         spin_lock_init(&card->ip_lock);
1480         spin_lock_init(&card->thread_mask_lock);
1481         mutex_init(&card->conf_mutex);
1482         mutex_init(&card->discipline_mutex);
1483         mutex_init(&card->vid_list_mutex);
1484         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1485         INIT_LIST_HEAD(&card->cmd_waiter_list);
1486         init_waitqueue_head(&card->wait_q);
1487         qeth_set_initial_options(card);
1488         /* IP address takeover */
1489         INIT_LIST_HEAD(&card->ipato.entries);
1490         qeth_init_qdio_info(card);
1491         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1492         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1493 }
1494
1495 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1496 {
1497         struct qeth_card *card = container_of(slr, struct qeth_card,
1498                                         qeth_service_level);
1499         if (card->info.mcl_level[0])
1500                 seq_printf(m, "qeth: %s firmware level %s\n",
1501                         CARD_BUS_ID(card), card->info.mcl_level);
1502 }
1503
1504 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1505 {
1506         struct qeth_card *card;
1507
1508         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1509         card = kzalloc(sizeof(*card), GFP_KERNEL);
1510         if (!card)
1511                 goto out;
1512         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1513
1514         card->gdev = gdev;
1515         CARD_RDEV(card) = gdev->cdev[0];
1516         CARD_WDEV(card) = gdev->cdev[1];
1517         CARD_DDEV(card) = gdev->cdev[2];
1518         if (qeth_setup_channel(&card->read, true))
1519                 goto out_ip;
1520         if (qeth_setup_channel(&card->write, true))
1521                 goto out_channel;
1522         if (qeth_setup_channel(&card->data, false))
1523                 goto out_data;
1524         card->options.layer2 = -1;
1525         card->qeth_service_level.seq_print = qeth_core_sl_print;
1526         register_service_level(&card->qeth_service_level);
1527         return card;
1528
1529 out_data:
1530         qeth_clean_channel(&card->write);
1531 out_channel:
1532         qeth_clean_channel(&card->read);
1533 out_ip:
1534         kfree(card);
1535 out:
1536         return NULL;
1537 }
1538
1539 static int qeth_clear_channel(struct qeth_channel *channel)
1540 {
1541         unsigned long flags;
1542         struct qeth_card *card;
1543         int rc;
1544
1545         card = CARD_FROM_CDEV(channel->ccwdev);
1546         QETH_CARD_TEXT(card, 3, "clearch");
1547         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1548         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1549         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1550
1551         if (rc)
1552                 return rc;
1553         rc = wait_event_interruptible_timeout(card->wait_q,
1554                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1555         if (rc == -ERESTARTSYS)
1556                 return rc;
1557         if (channel->state != CH_STATE_STOPPED)
1558                 return -ETIME;
1559         channel->state = CH_STATE_DOWN;
1560         return 0;
1561 }
1562
1563 static int qeth_halt_channel(struct qeth_channel *channel)
1564 {
1565         unsigned long flags;
1566         struct qeth_card *card;
1567         int rc;
1568
1569         card = CARD_FROM_CDEV(channel->ccwdev);
1570         QETH_CARD_TEXT(card, 3, "haltch");
1571         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1572         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1573         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1574
1575         if (rc)
1576                 return rc;
1577         rc = wait_event_interruptible_timeout(card->wait_q,
1578                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1579         if (rc == -ERESTARTSYS)
1580                 return rc;
1581         if (channel->state != CH_STATE_HALTED)
1582                 return -ETIME;
1583         return 0;
1584 }
1585
1586 static int qeth_halt_channels(struct qeth_card *card)
1587 {
1588         int rc1 = 0, rc2 = 0, rc3 = 0;
1589
1590         QETH_CARD_TEXT(card, 3, "haltchs");
1591         rc1 = qeth_halt_channel(&card->read);
1592         rc2 = qeth_halt_channel(&card->write);
1593         rc3 = qeth_halt_channel(&card->data);
1594         if (rc1)
1595                 return rc1;
1596         if (rc2)
1597                 return rc2;
1598         return rc3;
1599 }
1600
1601 static int qeth_clear_channels(struct qeth_card *card)
1602 {
1603         int rc1 = 0, rc2 = 0, rc3 = 0;
1604
1605         QETH_CARD_TEXT(card, 3, "clearchs");
1606         rc1 = qeth_clear_channel(&card->read);
1607         rc2 = qeth_clear_channel(&card->write);
1608         rc3 = qeth_clear_channel(&card->data);
1609         if (rc1)
1610                 return rc1;
1611         if (rc2)
1612                 return rc2;
1613         return rc3;
1614 }
1615
1616 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1617 {
1618         int rc = 0;
1619
1620         QETH_CARD_TEXT(card, 3, "clhacrd");
1621
1622         if (halt)
1623                 rc = qeth_halt_channels(card);
1624         if (rc)
1625                 return rc;
1626         return qeth_clear_channels(card);
1627 }
1628
1629 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1630 {
1631         int rc = 0;
1632
1633         QETH_CARD_TEXT(card, 3, "qdioclr");
1634         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1635                 QETH_QDIO_CLEANING)) {
1636         case QETH_QDIO_ESTABLISHED:
1637                 if (card->info.type == QETH_CARD_TYPE_IQD)
1638                         rc = qdio_shutdown(CARD_DDEV(card),
1639                                 QDIO_FLAG_CLEANUP_USING_HALT);
1640                 else
1641                         rc = qdio_shutdown(CARD_DDEV(card),
1642                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1643                 if (rc)
1644                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1645                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1646                 break;
1647         case QETH_QDIO_CLEANING:
1648                 return rc;
1649         default:
1650                 break;
1651         }
1652         rc = qeth_clear_halt_card(card, use_halt);
1653         if (rc)
1654                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1655         card->state = CARD_STATE_DOWN;
1656         return rc;
1657 }
1658 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1659
1660 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1661                                int *length)
1662 {
1663         struct ciw *ciw;
1664         char *rcd_buf;
1665         int ret;
1666         struct qeth_channel *channel = &card->data;
1667         unsigned long flags;
1668
1669         /*
1670          * scan for RCD command in extended SenseID data
1671          */
1672         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1673         if (!ciw || ciw->cmd == 0)
1674                 return -EOPNOTSUPP;
1675         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1676         if (!rcd_buf)
1677                 return -ENOMEM;
1678
1679         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1680         channel->state = CH_STATE_RCD;
1681         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1682         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1683                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1684                                        QETH_RCD_TIMEOUT);
1685         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1686         if (!ret)
1687                 wait_event(card->wait_q,
1688                            (channel->state == CH_STATE_RCD_DONE ||
1689                             channel->state == CH_STATE_DOWN));
1690         if (channel->state == CH_STATE_DOWN)
1691                 ret = -EIO;
1692         else
1693                 channel->state = CH_STATE_DOWN;
1694         if (ret) {
1695                 kfree(rcd_buf);
1696                 *buffer = NULL;
1697                 *length = 0;
1698         } else {
1699                 *length = ciw->count;
1700                 *buffer = rcd_buf;
1701         }
1702         return ret;
1703 }
1704
1705 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1706 {
1707         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1708         card->info.chpid = prcd[30];
1709         card->info.unit_addr2 = prcd[31];
1710         card->info.cula = prcd[63];
1711         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1712                                (prcd[0x11] == _ascebc['M']));
1713 }
1714
1715 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1716 {
1717         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1718         struct diag26c_vnic_resp *response = NULL;
1719         struct diag26c_vnic_req *request = NULL;
1720         struct ccw_dev_id id;
1721         char userid[80];
1722         int rc = 0;
1723
1724         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1725
1726         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1727         if (rc)
1728                 goto out;
1729
1730         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1731         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1732         if (!request || !response) {
1733                 rc = -ENOMEM;
1734                 goto out;
1735         }
1736
1737         ccw_device_get_id(CARD_RDEV(card), &id);
1738         request->resp_buf_len = sizeof(*response);
1739         request->resp_version = DIAG26C_VERSION6_VM65918;
1740         request->req_format = DIAG26C_VNIC_INFO;
1741         ASCEBC(userid, 8);
1742         memcpy(&request->sys_name, userid, 8);
1743         request->devno = id.devno;
1744
1745         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1746         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1747         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1748         if (rc)
1749                 goto out;
1750         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1751
1752         if (request->resp_buf_len < sizeof(*response) ||
1753             response->version != request->resp_version) {
1754                 rc = -EIO;
1755                 goto out;
1756         }
1757
1758         if (response->protocol == VNIC_INFO_PROT_L2)
1759                 disc = QETH_DISCIPLINE_LAYER2;
1760         else if (response->protocol == VNIC_INFO_PROT_L3)
1761                 disc = QETH_DISCIPLINE_LAYER3;
1762
1763 out:
1764         kfree(response);
1765         kfree(request);
1766         if (rc)
1767                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1768         return disc;
1769 }
1770
1771 /* Determine whether the device requires a specific layer discipline */
1772 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1773 {
1774         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1775
1776         if (card->info.type == QETH_CARD_TYPE_OSM ||
1777             card->info.type == QETH_CARD_TYPE_OSN)
1778                 disc = QETH_DISCIPLINE_LAYER2;
1779         else if (card->info.guestlan)
1780                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1781                                 QETH_DISCIPLINE_LAYER3 :
1782                                 qeth_vm_detect_layer(card);
1783
1784         switch (disc) {
1785         case QETH_DISCIPLINE_LAYER2:
1786                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1787                 break;
1788         case QETH_DISCIPLINE_LAYER3:
1789                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1790                 break;
1791         default:
1792                 QETH_DBF_TEXT(SETUP, 3, "force no");
1793         }
1794
1795         return disc;
1796 }
1797
1798 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1799 {
1800         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1801
1802         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1803             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1804                 card->info.blkt.time_total = 0;
1805                 card->info.blkt.inter_packet = 0;
1806                 card->info.blkt.inter_packet_jumbo = 0;
1807         } else {
1808                 card->info.blkt.time_total = 250;
1809                 card->info.blkt.inter_packet = 5;
1810                 card->info.blkt.inter_packet_jumbo = 15;
1811         }
1812 }
1813
1814 static void qeth_init_tokens(struct qeth_card *card)
1815 {
1816         card->token.issuer_rm_w = 0x00010103UL;
1817         card->token.cm_filter_w = 0x00010108UL;
1818         card->token.cm_connection_w = 0x0001010aUL;
1819         card->token.ulp_filter_w = 0x0001010bUL;
1820         card->token.ulp_connection_w = 0x0001010dUL;
1821 }
1822
1823 static void qeth_init_func_level(struct qeth_card *card)
1824 {
1825         switch (card->info.type) {
1826         case QETH_CARD_TYPE_IQD:
1827                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1828                 break;
1829         case QETH_CARD_TYPE_OSD:
1830         case QETH_CARD_TYPE_OSN:
1831                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1832                 break;
1833         default:
1834                 break;
1835         }
1836 }
1837
1838 static int qeth_idx_activate_get_answer(struct qeth_channel *channel,
1839                 void (*idx_reply_cb)(struct qeth_channel *,
1840                         struct qeth_cmd_buffer *))
1841 {
1842         struct qeth_cmd_buffer *iob;
1843         unsigned long flags;
1844         int rc;
1845         struct qeth_card *card;
1846
1847         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1848         card = CARD_FROM_CDEV(channel->ccwdev);
1849         iob = qeth_get_buffer(channel);
1850         if (!iob)
1851                 return -ENOMEM;
1852         iob->callback = idx_reply_cb;
1853         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
1854
1855         wait_event(card->wait_q,
1856                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1857         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1858         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1859         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1860                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1861         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1862
1863         if (rc) {
1864                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1865                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1866                 atomic_set(&channel->irq_pending, 0);
1867                 qeth_release_buffer(channel, iob);
1868                 wake_up(&card->wait_q);
1869                 return rc;
1870         }
1871         rc = wait_event_interruptible_timeout(card->wait_q,
1872                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1873         if (rc == -ERESTARTSYS)
1874                 return rc;
1875         if (channel->state != CH_STATE_UP) {
1876                 rc = -ETIME;
1877                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1878         } else
1879                 rc = 0;
1880         return rc;
1881 }
1882
1883 static int qeth_idx_activate_channel(struct qeth_channel *channel,
1884                 void (*idx_reply_cb)(struct qeth_channel *,
1885                         struct qeth_cmd_buffer *))
1886 {
1887         struct qeth_card *card;
1888         struct qeth_cmd_buffer *iob;
1889         unsigned long flags;
1890         __u16 temp;
1891         __u8 tmp;
1892         int rc;
1893         struct ccw_dev_id temp_devid;
1894
1895         card = CARD_FROM_CDEV(channel->ccwdev);
1896
1897         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1898
1899         iob = qeth_get_buffer(channel);
1900         if (!iob)
1901                 return -ENOMEM;
1902         iob->callback = idx_reply_cb;
1903         qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
1904                        iob->data);
1905         if (channel == &card->write) {
1906                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1907                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1908                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1909                 card->seqno.trans_hdr++;
1910         } else {
1911                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1912                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1913                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1914         }
1915         tmp = ((u8)card->dev->dev_port) | 0x80;
1916         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1917         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1918                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1919         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1920                &card->info.func_level, sizeof(__u16));
1921         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1922         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1923         temp = (card->info.cula << 8) + card->info.unit_addr2;
1924         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1925
1926         wait_event(card->wait_q,
1927                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1928         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1929         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1930         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1931                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1932         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1933
1934         if (rc) {
1935                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1936                         rc);
1937                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1938                 atomic_set(&channel->irq_pending, 0);
1939                 qeth_release_buffer(channel, iob);
1940                 wake_up(&card->wait_q);
1941                 return rc;
1942         }
1943         rc = wait_event_interruptible_timeout(card->wait_q,
1944                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1945         if (rc == -ERESTARTSYS)
1946                 return rc;
1947         if (channel->state != CH_STATE_ACTIVATING) {
1948                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1949                         " failed to recover an error on the device\n");
1950                 QETH_DBF_MESSAGE(2, "%s IDX activate timed out\n",
1951                         dev_name(&channel->ccwdev->dev));
1952                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1953                 return -ETIME;
1954         }
1955         return qeth_idx_activate_get_answer(channel, idx_reply_cb);
1956 }
1957
1958 static int qeth_peer_func_level(int level)
1959 {
1960         if ((level & 0xff) == 8)
1961                 return (level & 0xff) + 0x400;
1962         if (((level >> 8) & 3) == 1)
1963                 return (level & 0xff) + 0x200;
1964         return level;
1965 }
1966
1967 static void qeth_idx_write_cb(struct qeth_channel *channel,
1968                 struct qeth_cmd_buffer *iob)
1969 {
1970         struct qeth_card *card;
1971         __u16 temp;
1972
1973         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1974
1975         if (channel->state == CH_STATE_DOWN) {
1976                 channel->state = CH_STATE_ACTIVATING;
1977                 goto out;
1978         }
1979         card = CARD_FROM_CDEV(channel->ccwdev);
1980
1981         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1982                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1983                         dev_err(&channel->ccwdev->dev,
1984                                 "The adapter is used exclusively by another "
1985                                 "host\n");
1986                 else
1987                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel:"
1988                                 " negative reply\n",
1989                                 dev_name(&channel->ccwdev->dev));
1990                 goto out;
1991         }
1992         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1993         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1994                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on write channel: "
1995                         "function level mismatch (sent: 0x%x, received: "
1996                         "0x%x)\n", dev_name(&channel->ccwdev->dev),
1997                         card->info.func_level, temp);
1998                 goto out;
1999         }
2000         channel->state = CH_STATE_UP;
2001 out:
2002         qeth_release_buffer(channel, iob);
2003 }
2004
2005 static void qeth_idx_read_cb(struct qeth_channel *channel,
2006                 struct qeth_cmd_buffer *iob)
2007 {
2008         struct qeth_card *card;
2009         __u16 temp;
2010
2011         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
2012         if (channel->state == CH_STATE_DOWN) {
2013                 channel->state = CH_STATE_ACTIVATING;
2014                 goto out;
2015         }
2016
2017         card = CARD_FROM_CDEV(channel->ccwdev);
2018         if (qeth_check_idx_response(card, iob->data))
2019                         goto out;
2020
2021         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
2022                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2023                 case QETH_IDX_ACT_ERR_EXCL:
2024                         dev_err(&channel->ccwdev->dev,
2025                                 "The adapter is used exclusively by another "
2026                                 "host\n");
2027                         break;
2028                 case QETH_IDX_ACT_ERR_AUTH:
2029                 case QETH_IDX_ACT_ERR_AUTH_USER:
2030                         dev_err(&channel->ccwdev->dev,
2031                                 "Setting the device online failed because of "
2032                                 "insufficient authorization\n");
2033                         break;
2034                 default:
2035                         QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel:"
2036                                 " negative reply\n",
2037                                 dev_name(&channel->ccwdev->dev));
2038                 }
2039                 QETH_CARD_TEXT_(card, 2, "idxread%c",
2040                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2041                 goto out;
2042         }
2043
2044         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2045         if (temp != qeth_peer_func_level(card->info.func_level)) {
2046                 QETH_DBF_MESSAGE(2, "%s IDX_ACTIVATE on read channel: function "
2047                         "level mismatch (sent: 0x%x, received: 0x%x)\n",
2048                         dev_name(&channel->ccwdev->dev),
2049                         card->info.func_level, temp);
2050                 goto out;
2051         }
2052         memcpy(&card->token.issuer_rm_r,
2053                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2054                QETH_MPC_TOKEN_LENGTH);
2055         memcpy(&card->info.mcl_level[0],
2056                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2057         channel->state = CH_STATE_UP;
2058 out:
2059         qeth_release_buffer(channel, iob);
2060 }
2061
2062 void qeth_prepare_control_data(struct qeth_card *card, int len,
2063                 struct qeth_cmd_buffer *iob)
2064 {
2065         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
2066         iob->callback = qeth_release_buffer;
2067
2068         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2069                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2070         card->seqno.trans_hdr++;
2071         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2072                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2073         card->seqno.pdu_hdr++;
2074         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2075                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2076         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2077 }
2078 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2079
2080 /**
2081  * qeth_send_control_data() -   send control command to the card
2082  * @card:                       qeth_card structure pointer
2083  * @len:                        size of the command buffer
2084  * @iob:                        qeth_cmd_buffer pointer
2085  * @reply_cb:                   callback function pointer
2086  * @cb_card:                    pointer to the qeth_card structure
2087  * @cb_reply:                   pointer to the qeth_reply structure
2088  * @cb_cmd:                     pointer to the original iob for non-IPA
2089  *                              commands, or to the qeth_ipa_cmd structure
2090  *                              for the IPA commands.
2091  * @reply_param:                private pointer passed to the callback
2092  *
2093  * Returns the value of the `return_code' field of the response
2094  * block returned from the hardware, or other error indication.
2095  * Value of zero indicates successful execution of the command.
2096  *
2097  * Callback function gets called one or more times, with cb_cmd
2098  * pointing to the response returned by the hardware. Callback
2099  * function must return non-zero if more reply blocks are expected,
2100  * and zero if the last or only reply block is received. Callback
2101  * function can get the value of the reply_param pointer from the
2102  * field 'param' of the structure qeth_reply.
2103  */
2104
2105 int qeth_send_control_data(struct qeth_card *card, int len,
2106                 struct qeth_cmd_buffer *iob,
2107                 int (*reply_cb)(struct qeth_card *cb_card,
2108                                 struct qeth_reply *cb_reply,
2109                                 unsigned long cb_cmd),
2110                 void *reply_param)
2111 {
2112         struct qeth_channel *channel = iob->channel;
2113         int rc;
2114         unsigned long flags;
2115         struct qeth_reply *reply = NULL;
2116         unsigned long timeout, event_timeout;
2117         struct qeth_ipa_cmd *cmd = NULL;
2118
2119         QETH_CARD_TEXT(card, 2, "sendctl");
2120
2121         if (card->read_or_write_problem) {
2122                 qeth_release_buffer(channel, iob);
2123                 return -EIO;
2124         }
2125         reply = qeth_alloc_reply(card);
2126         if (!reply) {
2127                 qeth_release_buffer(channel, iob);
2128                 return -ENOMEM;
2129         }
2130         reply->callback = reply_cb;
2131         reply->param = reply_param;
2132
2133         init_waitqueue_head(&reply->wait_q);
2134
2135         while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
2136
2137         if (IS_IPA(iob->data)) {
2138                 cmd = __ipa_cmd(iob);
2139                 cmd->hdr.seqno = card->seqno.ipa++;
2140                 reply->seqno = cmd->hdr.seqno;
2141                 event_timeout = QETH_IPA_TIMEOUT;
2142         } else {
2143                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2144                 event_timeout = QETH_TIMEOUT;
2145         }
2146         qeth_prepare_control_data(card, len, iob);
2147
2148         spin_lock_irqsave(&card->lock, flags);
2149         list_add_tail(&reply->list, &card->cmd_waiter_list);
2150         spin_unlock_irqrestore(&card->lock, flags);
2151
2152         timeout = jiffies + event_timeout;
2153
2154         QETH_CARD_TEXT(card, 6, "noirqpnd");
2155         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
2156         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
2157                                       (addr_t) iob, 0, 0, event_timeout);
2158         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
2159         if (rc) {
2160                 QETH_DBF_MESSAGE(2, "%s qeth_send_control_data: "
2161                         "ccw_device_start rc = %i\n",
2162                         dev_name(&channel->ccwdev->dev), rc);
2163                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2164                 spin_lock_irqsave(&card->lock, flags);
2165                 list_del_init(&reply->list);
2166                 qeth_put_reply(reply);
2167                 spin_unlock_irqrestore(&card->lock, flags);
2168                 qeth_release_buffer(channel, iob);
2169                 atomic_set(&channel->irq_pending, 0);
2170                 wake_up(&card->wait_q);
2171                 return rc;
2172         }
2173
2174         /* we have only one long running ipassist, since we can ensure
2175            process context of this command we can sleep */
2176         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2177             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2178                 if (!wait_event_timeout(reply->wait_q,
2179                     atomic_read(&reply->received), event_timeout))
2180                         goto time_err;
2181         } else {
2182                 while (!atomic_read(&reply->received)) {
2183                         if (time_after(jiffies, timeout))
2184                                 goto time_err;
2185                         cpu_relax();
2186                 }
2187         }
2188
2189         rc = reply->rc;
2190         qeth_put_reply(reply);
2191         return rc;
2192
2193 time_err:
2194         reply->rc = -ETIME;
2195         spin_lock_irqsave(&reply->card->lock, flags);
2196         list_del_init(&reply->list);
2197         spin_unlock_irqrestore(&reply->card->lock, flags);
2198         atomic_inc(&reply->received);
2199         rc = reply->rc;
2200         qeth_put_reply(reply);
2201         return rc;
2202 }
2203 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2204
2205 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2206                 unsigned long data)
2207 {
2208         struct qeth_cmd_buffer *iob;
2209
2210         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2211
2212         iob = (struct qeth_cmd_buffer *) data;
2213         memcpy(&card->token.cm_filter_r,
2214                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2215                QETH_MPC_TOKEN_LENGTH);
2216         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2217         return 0;
2218 }
2219
2220 static int qeth_cm_enable(struct qeth_card *card)
2221 {
2222         int rc;
2223         struct qeth_cmd_buffer *iob;
2224
2225         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2226
2227         iob = qeth_wait_for_buffer(&card->write);
2228         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2229         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2230                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2231         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2232                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2233
2234         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2235                                     qeth_cm_enable_cb, NULL);
2236         return rc;
2237 }
2238
2239 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2240                 unsigned long data)
2241 {
2242
2243         struct qeth_cmd_buffer *iob;
2244
2245         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2246
2247         iob = (struct qeth_cmd_buffer *) data;
2248         memcpy(&card->token.cm_connection_r,
2249                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2250                QETH_MPC_TOKEN_LENGTH);
2251         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2252         return 0;
2253 }
2254
2255 static int qeth_cm_setup(struct qeth_card *card)
2256 {
2257         int rc;
2258         struct qeth_cmd_buffer *iob;
2259
2260         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2261
2262         iob = qeth_wait_for_buffer(&card->write);
2263         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2264         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2265                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2266         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2267                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2268         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2269                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2270         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2271                                     qeth_cm_setup_cb, NULL);
2272         return rc;
2273
2274 }
2275
2276 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2277 {
2278         struct net_device *dev = card->dev;
2279         unsigned int new_mtu;
2280
2281         if (!max_mtu) {
2282                 /* IQD needs accurate max MTU to set up its RX buffers: */
2283                 if (IS_IQD(card))
2284                         return -EINVAL;
2285                 /* tolerate quirky HW: */
2286                 max_mtu = ETH_MAX_MTU;
2287         }
2288
2289         rtnl_lock();
2290         if (IS_IQD(card)) {
2291                 /* move any device with default MTU to new max MTU: */
2292                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2293
2294                 /* adjust RX buffer size to new max MTU: */
2295                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2296                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2297                         qeth_free_qdio_buffers(card);
2298         } else {
2299                 if (dev->mtu)
2300                         new_mtu = dev->mtu;
2301                 /* default MTUs for first setup: */
2302                 else if (card->options.layer2)
2303                         new_mtu = ETH_DATA_LEN;
2304                 else
2305                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2306         }
2307
2308         dev->max_mtu = max_mtu;
2309         dev->mtu = min(new_mtu, max_mtu);
2310         rtnl_unlock();
2311         return 0;
2312 }
2313
2314 static int qeth_get_mtu_outof_framesize(int framesize)
2315 {
2316         switch (framesize) {
2317         case 0x4000:
2318                 return 8192;
2319         case 0x6000:
2320                 return 16384;
2321         case 0xa000:
2322                 return 32768;
2323         case 0xffff:
2324                 return 57344;
2325         default:
2326                 return 0;
2327         }
2328 }
2329
2330 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2331                 unsigned long data)
2332 {
2333
2334         __u16 mtu, framesize;
2335         __u16 len;
2336         __u8 link_type;
2337         struct qeth_cmd_buffer *iob;
2338
2339         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2340
2341         iob = (struct qeth_cmd_buffer *) data;
2342         memcpy(&card->token.ulp_filter_r,
2343                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2344                QETH_MPC_TOKEN_LENGTH);
2345         if (card->info.type == QETH_CARD_TYPE_IQD) {
2346                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2347                 mtu = qeth_get_mtu_outof_framesize(framesize);
2348         } else {
2349                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2350         }
2351         *(u16 *)reply->param = mtu;
2352
2353         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2354         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2355                 memcpy(&link_type,
2356                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2357                 card->info.link_type = link_type;
2358         } else
2359                 card->info.link_type = 0;
2360         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2361         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2362         return 0;
2363 }
2364
2365 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2366 {
2367         if (IS_OSN(card))
2368                 return QETH_PROT_OSN2;
2369         return (card->options.layer2 == 1) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2370 }
2371
2372 static int qeth_ulp_enable(struct qeth_card *card)
2373 {
2374         u8 prot_type = qeth_mpc_select_prot_type(card);
2375         struct qeth_cmd_buffer *iob;
2376         u16 max_mtu;
2377         int rc;
2378
2379         /*FIXME: trace view callbacks*/
2380         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2381
2382         iob = qeth_wait_for_buffer(&card->write);
2383         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2384
2385         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2386         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2387         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2388                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2389         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2390                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2391         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2392                                     qeth_ulp_enable_cb, &max_mtu);
2393         if (rc)
2394                 return rc;
2395         return qeth_update_max_mtu(card, max_mtu);
2396 }
2397
2398 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2399                 unsigned long data)
2400 {
2401         struct qeth_cmd_buffer *iob;
2402
2403         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2404
2405         iob = (struct qeth_cmd_buffer *) data;
2406         memcpy(&card->token.ulp_connection_r,
2407                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2408                QETH_MPC_TOKEN_LENGTH);
2409         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2410                      3)) {
2411                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2412                 dev_err(&card->gdev->dev, "A connection could not be "
2413                         "established because of an OLM limit\n");
2414                 iob->rc = -EMLINK;
2415         }
2416         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2417         return 0;
2418 }
2419
2420 static int qeth_ulp_setup(struct qeth_card *card)
2421 {
2422         int rc;
2423         __u16 temp;
2424         struct qeth_cmd_buffer *iob;
2425         struct ccw_dev_id dev_id;
2426
2427         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2428
2429         iob = qeth_wait_for_buffer(&card->write);
2430         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2431
2432         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2433                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2434         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2435                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2436         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2437                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2438
2439         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2440         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2441         temp = (card->info.cula << 8) + card->info.unit_addr2;
2442         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2443         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2444                                     qeth_ulp_setup_cb, NULL);
2445         return rc;
2446 }
2447
2448 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2449 {
2450         struct qeth_qdio_out_buffer *newbuf;
2451
2452         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2453         if (!newbuf)
2454                 return -ENOMEM;
2455
2456         newbuf->buffer = q->qdio_bufs[bidx];
2457         skb_queue_head_init(&newbuf->skb_list);
2458         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2459         newbuf->q = q;
2460         newbuf->next_pending = q->bufs[bidx];
2461         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2462         q->bufs[bidx] = newbuf;
2463         return 0;
2464 }
2465
2466 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2467 {
2468         if (!q)
2469                 return;
2470
2471         qeth_clear_outq_buffers(q, 1);
2472         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2473         kfree(q);
2474 }
2475
2476 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2477 {
2478         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2479
2480         if (!q)
2481                 return NULL;
2482
2483         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2484                 kfree(q);
2485                 return NULL;
2486         }
2487         return q;
2488 }
2489
2490 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2491 {
2492         int i, j;
2493
2494         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2495
2496         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2497                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2498                 return 0;
2499
2500         QETH_DBF_TEXT(SETUP, 2, "inq");
2501         card->qdio.in_q = qeth_alloc_qdio_queue();
2502         if (!card->qdio.in_q)
2503                 goto out_nomem;
2504
2505         /* inbound buffer pool */
2506         if (qeth_alloc_buffer_pool(card))
2507                 goto out_freeinq;
2508
2509         /* outbound */
2510         card->qdio.out_qs =
2511                 kcalloc(card->qdio.no_out_queues,
2512                         sizeof(struct qeth_qdio_out_q *),
2513                         GFP_KERNEL);
2514         if (!card->qdio.out_qs)
2515                 goto out_freepool;
2516         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2517                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2518                 if (!card->qdio.out_qs[i])
2519                         goto out_freeoutq;
2520                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2521                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2522                 card->qdio.out_qs[i]->queue_no = i;
2523                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2524                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2525                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2526                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2527                                 goto out_freeoutqbufs;
2528                 }
2529         }
2530
2531         /* completion */
2532         if (qeth_alloc_cq(card))
2533                 goto out_freeoutq;
2534
2535         return 0;
2536
2537 out_freeoutqbufs:
2538         while (j > 0) {
2539                 --j;
2540                 kmem_cache_free(qeth_qdio_outbuf_cache,
2541                                 card->qdio.out_qs[i]->bufs[j]);
2542                 card->qdio.out_qs[i]->bufs[j] = NULL;
2543         }
2544 out_freeoutq:
2545         while (i > 0)
2546                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2547         kfree(card->qdio.out_qs);
2548         card->qdio.out_qs = NULL;
2549 out_freepool:
2550         qeth_free_buffer_pool(card);
2551 out_freeinq:
2552         qeth_free_qdio_queue(card->qdio.in_q);
2553         card->qdio.in_q = NULL;
2554 out_nomem:
2555         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2556         return -ENOMEM;
2557 }
2558
2559 static void qeth_free_qdio_buffers(struct qeth_card *card)
2560 {
2561         int i, j;
2562
2563         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2564                 QETH_QDIO_UNINITIALIZED)
2565                 return;
2566
2567         qeth_free_cq(card);
2568         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2569         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2570                 if (card->qdio.in_q->bufs[j].rx_skb)
2571                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2572         }
2573         qeth_free_qdio_queue(card->qdio.in_q);
2574         card->qdio.in_q = NULL;
2575         /* inbound buffer pool */
2576         qeth_free_buffer_pool(card);
2577         /* free outbound qdio_qs */
2578         if (card->qdio.out_qs) {
2579                 for (i = 0; i < card->qdio.no_out_queues; i++)
2580                         qeth_free_output_queue(card->qdio.out_qs[i]);
2581                 kfree(card->qdio.out_qs);
2582                 card->qdio.out_qs = NULL;
2583         }
2584 }
2585
2586 static void qeth_create_qib_param_field(struct qeth_card *card,
2587                 char *param_field)
2588 {
2589
2590         param_field[0] = _ascebc['P'];
2591         param_field[1] = _ascebc['C'];
2592         param_field[2] = _ascebc['I'];
2593         param_field[3] = _ascebc['T'];
2594         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2595         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2596         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2597 }
2598
2599 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2600                 char *param_field)
2601 {
2602         param_field[16] = _ascebc['B'];
2603         param_field[17] = _ascebc['L'];
2604         param_field[18] = _ascebc['K'];
2605         param_field[19] = _ascebc['T'];
2606         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2607         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2608         *((unsigned int *) (&param_field[28])) =
2609                 card->info.blkt.inter_packet_jumbo;
2610 }
2611
2612 static int qeth_qdio_activate(struct qeth_card *card)
2613 {
2614         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2615         return qdio_activate(CARD_DDEV(card));
2616 }
2617
2618 static int qeth_dm_act(struct qeth_card *card)
2619 {
2620         int rc;
2621         struct qeth_cmd_buffer *iob;
2622
2623         QETH_DBF_TEXT(SETUP, 2, "dmact");
2624
2625         iob = qeth_wait_for_buffer(&card->write);
2626         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2627
2628         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2629                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2630         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2631                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2632         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2633         return rc;
2634 }
2635
2636 static int qeth_mpc_initialize(struct qeth_card *card)
2637 {
2638         int rc;
2639
2640         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2641
2642         rc = qeth_issue_next_read(card);
2643         if (rc) {
2644                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2645                 return rc;
2646         }
2647         rc = qeth_cm_enable(card);
2648         if (rc) {
2649                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2650                 goto out_qdio;
2651         }
2652         rc = qeth_cm_setup(card);
2653         if (rc) {
2654                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2655                 goto out_qdio;
2656         }
2657         rc = qeth_ulp_enable(card);
2658         if (rc) {
2659                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2660                 goto out_qdio;
2661         }
2662         rc = qeth_ulp_setup(card);
2663         if (rc) {
2664                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2665                 goto out_qdio;
2666         }
2667         rc = qeth_alloc_qdio_buffers(card);
2668         if (rc) {
2669                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2670                 goto out_qdio;
2671         }
2672         rc = qeth_qdio_establish(card);
2673         if (rc) {
2674                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2675                 qeth_free_qdio_buffers(card);
2676                 goto out_qdio;
2677         }
2678         rc = qeth_qdio_activate(card);
2679         if (rc) {
2680                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2681                 goto out_qdio;
2682         }
2683         rc = qeth_dm_act(card);
2684         if (rc) {
2685                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2686                 goto out_qdio;
2687         }
2688
2689         return 0;
2690 out_qdio:
2691         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2692         qdio_free(CARD_DDEV(card));
2693         return rc;
2694 }
2695
2696 void qeth_print_status_message(struct qeth_card *card)
2697 {
2698         switch (card->info.type) {
2699         case QETH_CARD_TYPE_OSD:
2700         case QETH_CARD_TYPE_OSM:
2701         case QETH_CARD_TYPE_OSX:
2702                 /* VM will use a non-zero first character
2703                  * to indicate a HiperSockets like reporting
2704                  * of the level OSA sets the first character to zero
2705                  * */
2706                 if (!card->info.mcl_level[0]) {
2707                         sprintf(card->info.mcl_level, "%02x%02x",
2708                                 card->info.mcl_level[2],
2709                                 card->info.mcl_level[3]);
2710                         break;
2711                 }
2712                 /* fallthrough */
2713         case QETH_CARD_TYPE_IQD:
2714                 if ((card->info.guestlan) ||
2715                     (card->info.mcl_level[0] & 0x80)) {
2716                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2717                                 card->info.mcl_level[0]];
2718                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2719                                 card->info.mcl_level[1]];
2720                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2721                                 card->info.mcl_level[2]];
2722                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2723                                 card->info.mcl_level[3]];
2724                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2725                 }
2726                 break;
2727         default:
2728                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2729         }
2730         dev_info(&card->gdev->dev,
2731                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2732                  qeth_get_cardname(card),
2733                  (card->info.mcl_level[0]) ? " (level: " : "",
2734                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2735                  (card->info.mcl_level[0]) ? ")" : "",
2736                  qeth_get_cardname_short(card));
2737 }
2738 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2739
2740 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2741 {
2742         struct qeth_buffer_pool_entry *entry;
2743
2744         QETH_CARD_TEXT(card, 5, "inwrklst");
2745
2746         list_for_each_entry(entry,
2747                             &card->qdio.init_pool.entry_list, init_list) {
2748                 qeth_put_buffer_pool_entry(card, entry);
2749         }
2750 }
2751
2752 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2753                                         struct qeth_card *card)
2754 {
2755         struct list_head *plh;
2756         struct qeth_buffer_pool_entry *entry;
2757         int i, free;
2758         struct page *page;
2759
2760         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2761                 return NULL;
2762
2763         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2764                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2765                 free = 1;
2766                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2767                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2768                                 free = 0;
2769                                 break;
2770                         }
2771                 }
2772                 if (free) {
2773                         list_del_init(&entry->list);
2774                         return entry;
2775                 }
2776         }
2777
2778         /* no free buffer in pool so take first one and swap pages */
2779         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2780                         struct qeth_buffer_pool_entry, list);
2781         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2782                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2783                         page = alloc_page(GFP_ATOMIC);
2784                         if (!page) {
2785                                 return NULL;
2786                         } else {
2787                                 free_page((unsigned long)entry->elements[i]);
2788                                 entry->elements[i] = page_address(page);
2789                                 if (card->options.performance_stats)
2790                                         card->perf_stats.sg_alloc_page_rx++;
2791                         }
2792                 }
2793         }
2794         list_del_init(&entry->list);
2795         return entry;
2796 }
2797
2798 static int qeth_init_input_buffer(struct qeth_card *card,
2799                 struct qeth_qdio_buffer *buf)
2800 {
2801         struct qeth_buffer_pool_entry *pool_entry;
2802         int i;
2803
2804         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2805                 buf->rx_skb = netdev_alloc_skb(card->dev,
2806                                                QETH_RX_PULL_LEN + ETH_HLEN);
2807                 if (!buf->rx_skb)
2808                         return -ENOMEM;
2809         }
2810
2811         pool_entry = qeth_find_free_buffer_pool_entry(card);
2812         if (!pool_entry)
2813                 return -ENOBUFS;
2814
2815         /*
2816          * since the buffer is accessed only from the input_tasklet
2817          * there shouldn't be a need to synchronize; also, since we use
2818          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2819          * buffers
2820          */
2821
2822         buf->pool_entry = pool_entry;
2823         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2824                 buf->buffer->element[i].length = PAGE_SIZE;
2825                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2826                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2827                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2828                 else
2829                         buf->buffer->element[i].eflags = 0;
2830                 buf->buffer->element[i].sflags = 0;
2831         }
2832         return 0;
2833 }
2834
2835 int qeth_init_qdio_queues(struct qeth_card *card)
2836 {
2837         int i, j;
2838         int rc;
2839
2840         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2841
2842         /* inbound queue */
2843         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2844         memset(&card->rx, 0, sizeof(struct qeth_rx));
2845
2846         qeth_initialize_working_pool_list(card);
2847         /*give only as many buffers to hardware as we have buffer pool entries*/
2848         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
2849                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2850                 if (rc)
2851                         return rc;
2852         }
2853
2854         card->qdio.in_q->next_buf_to_init =
2855                 card->qdio.in_buf_pool.buf_count - 1;
2856         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2857                      card->qdio.in_buf_pool.buf_count - 1);
2858         if (rc) {
2859                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2860                 return rc;
2861         }
2862
2863         /* completion */
2864         rc = qeth_cq_init(card);
2865         if (rc) {
2866                 return rc;
2867         }
2868
2869         /* outbound queue */
2870         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2871                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2872                                    QDIO_MAX_BUFFERS_PER_Q);
2873                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2874                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2875                                                  card->qdio.out_qs[i]->bufs[j]);
2876                 }
2877                 card->qdio.out_qs[i]->card = card;
2878                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2879                 card->qdio.out_qs[i]->do_pack = 0;
2880                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2881                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2882                 atomic_set(&card->qdio.out_qs[i]->state,
2883                            QETH_OUT_Q_UNLOCKED);
2884         }
2885         return 0;
2886 }
2887 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2888
2889 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2890 {
2891         switch (link_type) {
2892         case QETH_LINK_TYPE_HSTR:
2893                 return 2;
2894         default:
2895                 return 1;
2896         }
2897 }
2898
2899 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2900                 struct qeth_ipa_cmd *cmd, __u8 command,
2901                 enum qeth_prot_versions prot)
2902 {
2903         memset(cmd, 0, sizeof(struct qeth_ipa_cmd));
2904         cmd->hdr.command = command;
2905         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2906         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2907         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2908         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2909         if (card->options.layer2)
2910                 cmd->hdr.prim_version_no = 2;
2911         else
2912                 cmd->hdr.prim_version_no = 1;
2913         cmd->hdr.param_count = 1;
2914         cmd->hdr.prot_version = prot;
2915         cmd->hdr.ipa_supported = 0;
2916         cmd->hdr.ipa_enabled = 0;
2917 }
2918
2919 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2920                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2921 {
2922         struct qeth_cmd_buffer *iob;
2923
2924         iob = qeth_get_buffer(&card->write);
2925         if (iob) {
2926                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2927         } else {
2928                 dev_warn(&card->gdev->dev,
2929                          "The qeth driver ran out of channel command buffers\n");
2930                 QETH_DBF_MESSAGE(1, "%s The qeth driver ran out of channel command buffers",
2931                                  dev_name(&card->gdev->dev));
2932         }
2933
2934         return iob;
2935 }
2936 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2937
2938 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob)
2939 {
2940         u8 prot_type = qeth_mpc_select_prot_type(card);
2941
2942         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2943         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2944         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2945                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2946 }
2947 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2948
2949 /**
2950  * qeth_send_ipa_cmd() - send an IPA command
2951  *
2952  * See qeth_send_control_data() for explanation of the arguments.
2953  */
2954
2955 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2956                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2957                         unsigned long),
2958                 void *reply_param)
2959 {
2960         int rc;
2961
2962         QETH_CARD_TEXT(card, 4, "sendipa");
2963         qeth_prepare_ipa_cmd(card, iob);
2964         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2965                                                 iob, reply_cb, reply_param);
2966         if (rc == -ETIME) {
2967                 qeth_clear_ipacmd_list(card);
2968                 qeth_schedule_recovery(card);
2969         }
2970         return rc;
2971 }
2972 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2973
2974 static int qeth_send_startlan(struct qeth_card *card)
2975 {
2976         int rc;
2977         struct qeth_cmd_buffer *iob;
2978
2979         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2980
2981         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2982         if (!iob)
2983                 return -ENOMEM;
2984         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
2985         return rc;
2986 }
2987
2988 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2989 {
2990         if (!cmd->hdr.return_code)
2991                 cmd->hdr.return_code =
2992                         cmd->data.setadapterparms.hdr.return_code;
2993         return cmd->hdr.return_code;
2994 }
2995
2996 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2997                 struct qeth_reply *reply, unsigned long data)
2998 {
2999         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3000
3001         QETH_CARD_TEXT(card, 3, "quyadpcb");
3002         if (qeth_setadpparms_inspect_rc(cmd))
3003                 return 0;
3004
3005         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
3006                 card->info.link_type =
3007                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
3008                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
3009         }
3010         card->options.adp.supported_funcs =
3011                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
3012         return 0;
3013 }
3014
3015 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3016                 __u32 command, __u32 cmdlen)
3017 {
3018         struct qeth_cmd_buffer *iob;
3019         struct qeth_ipa_cmd *cmd;
3020
3021         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
3022                                      QETH_PROT_IPV4);
3023         if (iob) {
3024                 cmd = __ipa_cmd(iob);
3025                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
3026                 cmd->data.setadapterparms.hdr.command_code = command;
3027                 cmd->data.setadapterparms.hdr.used_total = 1;
3028                 cmd->data.setadapterparms.hdr.seq_no = 1;
3029         }
3030
3031         return iob;
3032 }
3033
3034 static int qeth_query_setadapterparms(struct qeth_card *card)
3035 {
3036         int rc;
3037         struct qeth_cmd_buffer *iob;
3038
3039         QETH_CARD_TEXT(card, 3, "queryadp");
3040         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3041                                    sizeof(struct qeth_ipacmd_setadpparms));
3042         if (!iob)
3043                 return -ENOMEM;
3044         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3045         return rc;
3046 }
3047
3048 static int qeth_query_ipassists_cb(struct qeth_card *card,
3049                 struct qeth_reply *reply, unsigned long data)
3050 {
3051         struct qeth_ipa_cmd *cmd;
3052
3053         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
3054
3055         cmd = (struct qeth_ipa_cmd *) data;
3056
3057         switch (cmd->hdr.return_code) {
3058         case IPA_RC_NOTSUPP:
3059         case IPA_RC_L2_UNSUPPORTED_CMD:
3060                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
3061                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
3062                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
3063                 return -0;
3064         default:
3065                 if (cmd->hdr.return_code) {
3066                         QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Unhandled "
3067                                                 "rc=%d\n",
3068                                                 dev_name(&card->gdev->dev),
3069                                                 cmd->hdr.return_code);
3070                         return 0;
3071                 }
3072         }
3073
3074         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
3075                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
3076                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
3077         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
3078                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
3079                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
3080         } else
3081                 QETH_DBF_MESSAGE(1, "%s IPA_CMD_QIPASSIST: Flawed LIC detected"
3082                                         "\n", dev_name(&card->gdev->dev));
3083         return 0;
3084 }
3085
3086 static int qeth_query_ipassists(struct qeth_card *card,
3087                                 enum qeth_prot_versions prot)
3088 {
3089         int rc;
3090         struct qeth_cmd_buffer *iob;
3091
3092         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3093         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3094         if (!iob)
3095                 return -ENOMEM;
3096         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3097         return rc;
3098 }
3099
3100 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3101                                 struct qeth_reply *reply, unsigned long data)
3102 {
3103         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3104         struct qeth_query_switch_attributes *attrs;
3105         struct qeth_switch_info *sw_info;
3106
3107         QETH_CARD_TEXT(card, 2, "qswiatcb");
3108         if (qeth_setadpparms_inspect_rc(cmd))
3109                 return 0;
3110
3111         sw_info = (struct qeth_switch_info *)reply->param;
3112         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3113         sw_info->capabilities = attrs->capabilities;
3114         sw_info->settings = attrs->settings;
3115         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3116                         sw_info->settings);
3117         return 0;
3118 }
3119
3120 int qeth_query_switch_attributes(struct qeth_card *card,
3121                                  struct qeth_switch_info *sw_info)
3122 {
3123         struct qeth_cmd_buffer *iob;
3124
3125         QETH_CARD_TEXT(card, 2, "qswiattr");
3126         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3127                 return -EOPNOTSUPP;
3128         if (!netif_carrier_ok(card->dev))
3129                 return -ENOMEDIUM;
3130         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3131                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3132         if (!iob)
3133                 return -ENOMEM;
3134         return qeth_send_ipa_cmd(card, iob,
3135                                 qeth_query_switch_attributes_cb, sw_info);
3136 }
3137
3138 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3139                 struct qeth_reply *reply, unsigned long data)
3140 {
3141         struct qeth_ipa_cmd *cmd;
3142         __u16 rc;
3143
3144         cmd = (struct qeth_ipa_cmd *)data;
3145         rc = cmd->hdr.return_code;
3146         if (rc)
3147                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3148         else
3149                 card->info.diagass_support = cmd->data.diagass.ext;
3150         return 0;
3151 }
3152
3153 static int qeth_query_setdiagass(struct qeth_card *card)
3154 {
3155         struct qeth_cmd_buffer *iob;
3156         struct qeth_ipa_cmd    *cmd;
3157
3158         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3159         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3160         if (!iob)
3161                 return -ENOMEM;
3162         cmd = __ipa_cmd(iob);
3163         cmd->data.diagass.subcmd_len = 16;
3164         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3165         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3166 }
3167
3168 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3169 {
3170         unsigned long info = get_zeroed_page(GFP_KERNEL);
3171         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3172         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3173         struct ccw_dev_id ccwid;
3174         int level;
3175
3176         tid->chpid = card->info.chpid;
3177         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3178         tid->ssid = ccwid.ssid;
3179         tid->devno = ccwid.devno;
3180         if (!info)
3181                 return;
3182         level = stsi(NULL, 0, 0, 0);
3183         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3184                 tid->lparnr = info222->lpar_number;
3185         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3186                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3187                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3188         }
3189         free_page(info);
3190         return;
3191 }
3192
3193 static int qeth_hw_trap_cb(struct qeth_card *card,
3194                 struct qeth_reply *reply, unsigned long data)
3195 {
3196         struct qeth_ipa_cmd *cmd;
3197         __u16 rc;
3198
3199         cmd = (struct qeth_ipa_cmd *)data;
3200         rc = cmd->hdr.return_code;
3201         if (rc)
3202                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3203         return 0;
3204 }
3205
3206 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3207 {
3208         struct qeth_cmd_buffer *iob;
3209         struct qeth_ipa_cmd *cmd;
3210
3211         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3212         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3213         if (!iob)
3214                 return -ENOMEM;
3215         cmd = __ipa_cmd(iob);
3216         cmd->data.diagass.subcmd_len = 80;
3217         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3218         cmd->data.diagass.type = 1;
3219         cmd->data.diagass.action = action;
3220         switch (action) {
3221         case QETH_DIAGS_TRAP_ARM:
3222                 cmd->data.diagass.options = 0x0003;
3223                 cmd->data.diagass.ext = 0x00010000 +
3224                         sizeof(struct qeth_trap_id);
3225                 qeth_get_trap_id(card,
3226                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3227                 break;
3228         case QETH_DIAGS_TRAP_DISARM:
3229                 cmd->data.diagass.options = 0x0001;
3230                 break;
3231         case QETH_DIAGS_TRAP_CAPTURE:
3232                 break;
3233         }
3234         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3235 }
3236 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3237
3238 static int qeth_check_qdio_errors(struct qeth_card *card,
3239                                   struct qdio_buffer *buf,
3240                                   unsigned int qdio_error,
3241                                   const char *dbftext)
3242 {
3243         if (qdio_error) {
3244                 QETH_CARD_TEXT(card, 2, dbftext);
3245                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3246                                buf->element[15].sflags);
3247                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3248                                buf->element[14].sflags);
3249                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3250                 if ((buf->element[15].sflags) == 0x12) {
3251                         card->stats.rx_dropped++;
3252                         return 0;
3253                 } else
3254                         return 1;
3255         }
3256         return 0;
3257 }
3258
3259 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3260 {
3261         struct qeth_qdio_q *queue = card->qdio.in_q;
3262         struct list_head *lh;
3263         int count;
3264         int i;
3265         int rc;
3266         int newcount = 0;
3267
3268         count = (index < queue->next_buf_to_init)?
3269                 card->qdio.in_buf_pool.buf_count -
3270                 (queue->next_buf_to_init - index) :
3271                 card->qdio.in_buf_pool.buf_count -
3272                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3273         /* only requeue at a certain threshold to avoid SIGAs */
3274         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3275                 for (i = queue->next_buf_to_init;
3276                      i < queue->next_buf_to_init + count; ++i) {
3277                         if (qeth_init_input_buffer(card,
3278                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3279                                 break;
3280                         } else {
3281                                 newcount++;
3282                         }
3283                 }
3284
3285                 if (newcount < count) {
3286                         /* we are in memory shortage so we switch back to
3287                            traditional skb allocation and drop packages */
3288                         atomic_set(&card->force_alloc_skb, 3);
3289                         count = newcount;
3290                 } else {
3291                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3292                 }
3293
3294                 if (!count) {
3295                         i = 0;
3296                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3297                                 i++;
3298                         if (i == card->qdio.in_buf_pool.buf_count) {
3299                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3300                                 card->reclaim_index = index;
3301                                 schedule_delayed_work(
3302                                         &card->buffer_reclaim_work,
3303                                         QETH_RECLAIM_WORK_TIME);
3304                         }
3305                         return;
3306                 }
3307
3308                 /*
3309                  * according to old code it should be avoided to requeue all
3310                  * 128 buffers in order to benefit from PCI avoidance.
3311                  * this function keeps at least one buffer (the buffer at
3312                  * 'index') un-requeued -> this buffer is the first buffer that
3313                  * will be requeued the next time
3314                  */
3315                 if (card->options.performance_stats) {
3316                         card->perf_stats.inbound_do_qdio_cnt++;
3317                         card->perf_stats.inbound_do_qdio_start_time =
3318                                 qeth_get_micros();
3319                 }
3320                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3321                              queue->next_buf_to_init, count);
3322                 if (card->options.performance_stats)
3323                         card->perf_stats.inbound_do_qdio_time +=
3324                                 qeth_get_micros() -
3325                                 card->perf_stats.inbound_do_qdio_start_time;
3326                 if (rc) {
3327                         QETH_CARD_TEXT(card, 2, "qinberr");
3328                 }
3329                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3330                                           QDIO_MAX_BUFFERS_PER_Q;
3331         }
3332 }
3333
3334 static void qeth_buffer_reclaim_work(struct work_struct *work)
3335 {
3336         struct qeth_card *card = container_of(work, struct qeth_card,
3337                 buffer_reclaim_work.work);
3338
3339         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3340         qeth_queue_input_buffer(card, card->reclaim_index);
3341 }
3342
3343 static void qeth_handle_send_error(struct qeth_card *card,
3344                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3345 {
3346         int sbalf15 = buffer->buffer->element[15].sflags;
3347
3348         QETH_CARD_TEXT(card, 6, "hdsnderr");
3349         if (card->info.type == QETH_CARD_TYPE_IQD) {
3350                 if (sbalf15 == 0) {
3351                         qdio_err = 0;
3352                 } else {
3353                         qdio_err = 1;
3354                 }
3355         }
3356         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3357
3358         if (!qdio_err)
3359                 return;
3360
3361         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3362                 return;
3363
3364         QETH_CARD_TEXT(card, 1, "lnkfail");
3365         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3366                        (u16)qdio_err, (u8)sbalf15);
3367 }
3368
3369 /**
3370  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3371  * @queue: queue to check for packing buffer
3372  *
3373  * Returns number of buffers that were prepared for flush.
3374  */
3375 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3376 {
3377         struct qeth_qdio_out_buffer *buffer;
3378
3379         buffer = queue->bufs[queue->next_buf_to_fill];
3380         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3381             (buffer->next_element_to_fill > 0)) {
3382                 /* it's a packing buffer */
3383                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3384                 queue->next_buf_to_fill =
3385                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3386                 return 1;
3387         }
3388         return 0;
3389 }
3390
3391 /*
3392  * Switched to packing state if the number of used buffers on a queue
3393  * reaches a certain limit.
3394  */
3395 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3396 {
3397         if (!queue->do_pack) {
3398                 if (atomic_read(&queue->used_buffers)
3399                     >= QETH_HIGH_WATERMARK_PACK){
3400                         /* switch non-PACKING -> PACKING */
3401                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3402                         if (queue->card->options.performance_stats)
3403                                 queue->card->perf_stats.sc_dp_p++;
3404                         queue->do_pack = 1;
3405                 }
3406         }
3407 }
3408
3409 /*
3410  * Switches from packing to non-packing mode. If there is a packing
3411  * buffer on the queue this buffer will be prepared to be flushed.
3412  * In that case 1 is returned to inform the caller. If no buffer
3413  * has to be flushed, zero is returned.
3414  */
3415 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3416 {
3417         if (queue->do_pack) {
3418                 if (atomic_read(&queue->used_buffers)
3419                     <= QETH_LOW_WATERMARK_PACK) {
3420                         /* switch PACKING -> non-PACKING */
3421                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3422                         if (queue->card->options.performance_stats)
3423                                 queue->card->perf_stats.sc_p_dp++;
3424                         queue->do_pack = 0;
3425                         return qeth_prep_flush_pack_buffer(queue);
3426                 }
3427         }
3428         return 0;
3429 }
3430
3431 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3432                                int count)
3433 {
3434         struct qeth_qdio_out_buffer *buf;
3435         int rc;
3436         int i;
3437         unsigned int qdio_flags;
3438
3439         for (i = index; i < index + count; ++i) {
3440                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3441                 buf = queue->bufs[bidx];
3442                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3443                                 SBAL_EFLAGS_LAST_ENTRY;
3444
3445                 if (queue->bufstates)
3446                         queue->bufstates[bidx].user = buf;
3447
3448                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3449                         continue;
3450
3451                 if (!queue->do_pack) {
3452                         if ((atomic_read(&queue->used_buffers) >=
3453                                 (QETH_HIGH_WATERMARK_PACK -
3454                                  QETH_WATERMARK_PACK_FUZZ)) &&
3455                             !atomic_read(&queue->set_pci_flags_count)) {
3456                                 /* it's likely that we'll go to packing
3457                                  * mode soon */
3458                                 atomic_inc(&queue->set_pci_flags_count);
3459                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3460                         }
3461                 } else {
3462                         if (!atomic_read(&queue->set_pci_flags_count)) {
3463                                 /*
3464                                  * there's no outstanding PCI any more, so we
3465                                  * have to request a PCI to be sure the the PCI
3466                                  * will wake at some time in the future then we
3467                                  * can flush packed buffers that might still be
3468                                  * hanging around, which can happen if no
3469                                  * further send was requested by the stack
3470                                  */
3471                                 atomic_inc(&queue->set_pci_flags_count);
3472                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3473                         }
3474                 }
3475         }
3476
3477         netif_trans_update(queue->card->dev);
3478         if (queue->card->options.performance_stats) {
3479                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3480                 queue->card->perf_stats.outbound_do_qdio_start_time =
3481                         qeth_get_micros();
3482         }
3483         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3484         if (atomic_read(&queue->set_pci_flags_count))
3485                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3486         atomic_add(count, &queue->used_buffers);
3487
3488         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3489                      queue->queue_no, index, count);
3490         if (queue->card->options.performance_stats)
3491                 queue->card->perf_stats.outbound_do_qdio_time +=
3492                         qeth_get_micros() -
3493                         queue->card->perf_stats.outbound_do_qdio_start_time;
3494         if (rc) {
3495                 queue->card->stats.tx_errors += count;
3496                 /* ignore temporary SIGA errors without busy condition */
3497                 if (rc == -ENOBUFS)
3498                         return;
3499                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3500                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3501                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3502                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3503                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3504
3505                 /* this must not happen under normal circumstances. if it
3506                  * happens something is really wrong -> recover */
3507                 qeth_schedule_recovery(queue->card);
3508                 return;
3509         }
3510         if (queue->card->options.performance_stats)
3511                 queue->card->perf_stats.bufs_sent += count;
3512 }
3513
3514 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3515 {
3516         int index;
3517         int flush_cnt = 0;
3518         int q_was_packing = 0;
3519
3520         /*
3521          * check if weed have to switch to non-packing mode or if
3522          * we have to get a pci flag out on the queue
3523          */
3524         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3525             !atomic_read(&queue->set_pci_flags_count)) {
3526                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3527                                 QETH_OUT_Q_UNLOCKED) {
3528                         /*
3529                          * If we get in here, there was no action in
3530                          * do_send_packet. So, we check if there is a
3531                          * packing buffer to be flushed here.
3532                          */
3533                         netif_stop_queue(queue->card->dev);
3534                         index = queue->next_buf_to_fill;
3535                         q_was_packing = queue->do_pack;
3536                         /* queue->do_pack may change */
3537                         barrier();
3538                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3539                         if (!flush_cnt &&
3540                             !atomic_read(&queue->set_pci_flags_count))
3541                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3542                         if (queue->card->options.performance_stats &&
3543                             q_was_packing)
3544                                 queue->card->perf_stats.bufs_sent_pack +=
3545                                         flush_cnt;
3546                         if (flush_cnt)
3547                                 qeth_flush_buffers(queue, index, flush_cnt);
3548                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3549                 }
3550         }
3551 }
3552
3553 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3554                                  unsigned long card_ptr)
3555 {
3556         struct qeth_card *card = (struct qeth_card *)card_ptr;
3557
3558         if (card->dev->flags & IFF_UP)
3559                 napi_schedule(&card->napi);
3560 }
3561
3562 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3563 {
3564         int rc;
3565
3566         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3567                 rc = -1;
3568                 goto out;
3569         } else {
3570                 if (card->options.cq == cq) {
3571                         rc = 0;
3572                         goto out;
3573                 }
3574
3575                 if (card->state != CARD_STATE_DOWN &&
3576                     card->state != CARD_STATE_RECOVER) {
3577                         rc = -1;
3578                         goto out;
3579                 }
3580
3581                 qeth_free_qdio_buffers(card);
3582                 card->options.cq = cq;
3583                 rc = 0;
3584         }
3585 out:
3586         return rc;
3587
3588 }
3589 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3590
3591 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3592                                  unsigned int queue, int first_element,
3593                                  int count)
3594 {
3595         struct qeth_qdio_q *cq = card->qdio.c_q;
3596         int i;
3597         int rc;
3598
3599         if (!qeth_is_cq(card, queue))
3600                 goto out;
3601
3602         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3603         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3604         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3605
3606         if (qdio_err) {
3607                 netif_stop_queue(card->dev);
3608                 qeth_schedule_recovery(card);
3609                 goto out;
3610         }
3611
3612         if (card->options.performance_stats) {
3613                 card->perf_stats.cq_cnt++;
3614                 card->perf_stats.cq_start_time = qeth_get_micros();
3615         }
3616
3617         for (i = first_element; i < first_element + count; ++i) {
3618                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3619                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3620                 int e = 0;
3621
3622                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3623                        buffer->element[e].addr) {
3624                         unsigned long phys_aob_addr;
3625
3626                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3627                         qeth_qdio_handle_aob(card, phys_aob_addr);
3628                         ++e;
3629                 }
3630                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3631         }
3632         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3633                     card->qdio.c_q->next_buf_to_init,
3634                     count);
3635         if (rc) {
3636                 dev_warn(&card->gdev->dev,
3637                         "QDIO reported an error, rc=%i\n", rc);
3638                 QETH_CARD_TEXT(card, 2, "qcqherr");
3639         }
3640         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3641                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3642
3643         netif_wake_queue(card->dev);
3644
3645         if (card->options.performance_stats) {
3646                 int delta_t = qeth_get_micros();
3647                 delta_t -= card->perf_stats.cq_start_time;
3648                 card->perf_stats.cq_time += delta_t;
3649         }
3650 out:
3651         return;
3652 }
3653
3654 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3655                                     unsigned int qdio_err, int queue,
3656                                     int first_elem, int count,
3657                                     unsigned long card_ptr)
3658 {
3659         struct qeth_card *card = (struct qeth_card *)card_ptr;
3660
3661         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3662         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3663
3664         if (qeth_is_cq(card, queue))
3665                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3666         else if (qdio_err)
3667                 qeth_schedule_recovery(card);
3668 }
3669
3670 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3671                                      unsigned int qdio_error, int __queue,
3672                                      int first_element, int count,
3673                                      unsigned long card_ptr)
3674 {
3675         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3676         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3677         struct qeth_qdio_out_buffer *buffer;
3678         int i;
3679
3680         QETH_CARD_TEXT(card, 6, "qdouhdl");
3681         if (qdio_error & QDIO_ERROR_FATAL) {
3682                 QETH_CARD_TEXT(card, 2, "achkcond");
3683                 netif_stop_queue(card->dev);
3684                 qeth_schedule_recovery(card);
3685                 return;
3686         }
3687         if (card->options.performance_stats) {
3688                 card->perf_stats.outbound_handler_cnt++;
3689                 card->perf_stats.outbound_handler_start_time =
3690                         qeth_get_micros();
3691         }
3692         for (i = first_element; i < (first_element + count); ++i) {
3693                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3694                 buffer = queue->bufs[bidx];
3695                 qeth_handle_send_error(card, buffer, qdio_error);
3696
3697                 if (queue->bufstates &&
3698                     (queue->bufstates[bidx].flags &
3699                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3700                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3701
3702                         if (atomic_cmpxchg(&buffer->state,
3703                                            QETH_QDIO_BUF_PRIMED,
3704                                            QETH_QDIO_BUF_PENDING) ==
3705                                 QETH_QDIO_BUF_PRIMED) {
3706                                 qeth_notify_skbs(queue, buffer,
3707                                                  TX_NOTIFY_PENDING);
3708                         }
3709                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3710
3711                         /* prepare the queue slot for re-use: */
3712                         qeth_scrub_qdio_buffer(buffer->buffer,
3713                                                QETH_MAX_BUFFER_ELEMENTS(card));
3714                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3715                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3716                                 qeth_schedule_recovery(card);
3717                         }
3718                 } else {
3719                         if (card->options.cq == QETH_CQ_ENABLED) {
3720                                 enum iucv_tx_notify n;
3721
3722                                 n = qeth_compute_cq_notification(
3723                                         buffer->buffer->element[15].sflags, 0);
3724                                 qeth_notify_skbs(queue, buffer, n);
3725                         }
3726
3727                         qeth_clear_output_buffer(queue, buffer);
3728                 }
3729                 qeth_cleanup_handled_pending(queue, bidx, 0);
3730         }
3731         atomic_sub(count, &queue->used_buffers);
3732         /* check if we need to do something on this outbound queue */
3733         if (card->info.type != QETH_CARD_TYPE_IQD)
3734                 qeth_check_outbound_queue(queue);
3735
3736         netif_wake_queue(queue->card->dev);
3737         if (card->options.performance_stats)
3738                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3739                         card->perf_stats.outbound_handler_start_time;
3740 }
3741
3742 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3743 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3744 {
3745         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3746                 return 2;
3747         return queue_num;
3748 }
3749
3750 /**
3751  * Note: Function assumes that we have 4 outbound queues.
3752  */
3753 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3754                             int ipv)
3755 {
3756         __be16 *tci;
3757         u8 tos;
3758
3759         switch (card->qdio.do_prio_queueing) {
3760         case QETH_PRIO_Q_ING_TOS:
3761         case QETH_PRIO_Q_ING_PREC:
3762                 switch (ipv) {
3763                 case 4:
3764                         tos = ipv4_get_dsfield(ip_hdr(skb));
3765                         break;
3766                 case 6:
3767                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3768                         break;
3769                 default:
3770                         return card->qdio.default_out_queue;
3771                 }
3772                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3773                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3774                 if (tos & IPTOS_MINCOST)
3775                         return qeth_cut_iqd_prio(card, 3);
3776                 if (tos & IPTOS_RELIABILITY)
3777                         return 2;
3778                 if (tos & IPTOS_THROUGHPUT)
3779                         return 1;
3780                 if (tos & IPTOS_LOWDELAY)
3781                         return 0;
3782                 break;
3783         case QETH_PRIO_Q_ING_SKB:
3784                 if (skb->priority > 5)
3785                         return 0;
3786                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3787         case QETH_PRIO_Q_ING_VLAN:
3788                 tci = &((struct ethhdr *)skb->data)->h_proto;
3789                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3790                         return qeth_cut_iqd_prio(card,
3791                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3792                 break;
3793         default:
3794                 break;
3795         }
3796         return card->qdio.default_out_queue;
3797 }
3798 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3799
3800 /**
3801  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3802  * @skb:                                SKB address
3803  *
3804  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3805  * fragmented part of the SKB. Returns zero for linear SKB.
3806  */
3807 int qeth_get_elements_for_frags(struct sk_buff *skb)
3808 {
3809         int cnt, elements = 0;
3810
3811         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3812                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3813
3814                 elements += qeth_get_elements_for_range(
3815                         (addr_t)skb_frag_address(frag),
3816                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3817         }
3818         return elements;
3819 }
3820 EXPORT_SYMBOL_GPL(qeth_get_elements_for_frags);
3821
3822 static unsigned int qeth_count_elements(struct sk_buff *skb, int data_offset)
3823 {
3824         unsigned int elements = qeth_get_elements_for_frags(skb);
3825         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3826         addr_t start = (addr_t)skb->data + data_offset;
3827
3828         if (start != end)
3829                 elements += qeth_get_elements_for_range(start, end);
3830         return elements;
3831 }
3832
3833 /**
3834  * qeth_get_elements_no() -     find number of SBALEs for skb data, inc. frags.
3835  * @card:                       qeth card structure, to check max. elems.
3836  * @skb:                        SKB address
3837  * @extra_elems:                extra elems needed, to check against max.
3838  * @data_offset:                range starts at skb->data + data_offset
3839  *
3840  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3841  * skb data, including linear part and fragments. Checks if the result plus
3842  * extra_elems fits under the limit for the card. Returns 0 if it does not.
3843  * Note: extra_elems is not included in the returned result.
3844  */
3845 int qeth_get_elements_no(struct qeth_card *card,
3846                      struct sk_buff *skb, int extra_elems, int data_offset)
3847 {
3848         int elements = qeth_count_elements(skb, data_offset);
3849
3850         if ((elements + extra_elems) > QETH_MAX_BUFFER_ELEMENTS(card)) {
3851                 QETH_DBF_MESSAGE(2, "Invalid size of IP packet "
3852                         "(Number=%d / Length=%d). Discarded.\n",
3853                         elements + extra_elems, skb->len);
3854                 return 0;
3855         }
3856         return elements;
3857 }
3858 EXPORT_SYMBOL_GPL(qeth_get_elements_no);
3859
3860 int qeth_hdr_chk_and_bounce(struct sk_buff *skb, struct qeth_hdr **hdr, int len)
3861 {
3862         int hroom, inpage, rest;
3863
3864         if (((unsigned long)skb->data & PAGE_MASK) !=
3865             (((unsigned long)skb->data + len - 1) & PAGE_MASK)) {
3866                 hroom = skb_headroom(skb);
3867                 inpage = PAGE_SIZE - ((unsigned long) skb->data % PAGE_SIZE);
3868                 rest = len - inpage;
3869                 if (rest > hroom)
3870                         return 1;
3871                 memmove(skb->data - rest, skb->data, skb_headlen(skb));
3872                 skb->data -= rest;
3873                 skb->tail -= rest;
3874                 *hdr = (struct qeth_hdr *)skb->data;
3875                 QETH_DBF_MESSAGE(2, "skb bounce len: %d rest: %d\n", len, rest);
3876         }
3877         return 0;
3878 }
3879 EXPORT_SYMBOL_GPL(qeth_hdr_chk_and_bounce);
3880
3881 /**
3882  * qeth_add_hw_header() - add a HW header to an skb.
3883  * @skb: skb that the HW header should be added to.
3884  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3885  *       it contains a valid pointer to a qeth_hdr.
3886  * @hdr_len: length of the HW header.
3887  * @proto_len: length of protocol headers that need to be in same page as the
3888  *             HW header.
3889  *
3890  * Returns the pushed length. If the header can't be pushed on
3891  * (eg. because it would cross a page boundary), it is allocated from
3892  * the cache instead and 0 is returned.
3893  * The number of needed buffer elements is returned in @elements.
3894  * Error to create the hdr is indicated by returning with < 0.
3895  */
3896 int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
3897                        struct qeth_hdr **hdr, unsigned int hdr_len,
3898                        unsigned int proto_len, unsigned int *elements)
3899 {
3900         const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3901         const unsigned int contiguous = proto_len ? proto_len : 1;
3902         unsigned int __elements;
3903         addr_t start, end;
3904         bool push_ok;
3905         int rc;
3906
3907 check_layout:
3908         start = (addr_t)skb->data - hdr_len;
3909         end = (addr_t)skb->data;
3910
3911         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3912                 /* Push HW header into same page as first protocol header. */
3913                 push_ok = true;
3914                 __elements = qeth_count_elements(skb, 0);
3915         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3916                 /* Push HW header into a new page. */
3917                 push_ok = true;
3918                 __elements = 1 + qeth_count_elements(skb, 0);
3919         } else {
3920                 /* Use header cache, copy protocol headers up. */
3921                 push_ok = false;
3922                 __elements = 1 + qeth_count_elements(skb, proto_len);
3923         }
3924
3925         /* Compress skb to fit into one IO buffer: */
3926         if (__elements > max_elements) {
3927                 if (!skb_is_nonlinear(skb)) {
3928                         /* Drop it, no easy way of shrinking it further. */
3929                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3930                                          max_elements, __elements, skb->len);
3931                         return -E2BIG;
3932                 }
3933
3934                 rc = skb_linearize(skb);
3935                 if (card->options.performance_stats) {
3936                         if (rc)
3937                                 card->perf_stats.tx_linfail++;
3938                         else
3939                                 card->perf_stats.tx_lin++;
3940                 }
3941                 if (rc)
3942                         return rc;
3943
3944                 /* Linearization changed the layout, re-evaluate: */
3945                 goto check_layout;
3946         }
3947
3948         *elements = __elements;
3949         /* Add the header: */
3950         if (push_ok) {
3951                 *hdr = skb_push(skb, hdr_len);
3952                 return hdr_len;
3953         }
3954         /* fall back */
3955         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3956         if (!*hdr)
3957                 return -ENOMEM;
3958         /* Copy protocol headers behind HW header: */
3959         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3960         return 0;
3961 }
3962 EXPORT_SYMBOL_GPL(qeth_add_hw_header);
3963
3964 static void __qeth_fill_buffer(struct sk_buff *skb,
3965                                struct qeth_qdio_out_buffer *buf,
3966                                bool is_first_elem, unsigned int offset)
3967 {
3968         struct qdio_buffer *buffer = buf->buffer;
3969         int element = buf->next_element_to_fill;
3970         int length = skb_headlen(skb) - offset;
3971         char *data = skb->data + offset;
3972         int length_here, cnt;
3973
3974         /* map linear part into buffer element(s) */
3975         while (length > 0) {
3976                 /* length_here is the remaining amount of data in this page */
3977                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3978                 if (length < length_here)
3979                         length_here = length;
3980
3981                 buffer->element[element].addr = data;
3982                 buffer->element[element].length = length_here;
3983                 length -= length_here;
3984                 if (is_first_elem) {
3985                         is_first_elem = false;
3986                         if (length || skb_is_nonlinear(skb))
3987                                 /* skb needs additional elements */
3988                                 buffer->element[element].eflags =
3989                                         SBAL_EFLAGS_FIRST_FRAG;
3990                         else
3991                                 buffer->element[element].eflags = 0;
3992                 } else {
3993                         buffer->element[element].eflags =
3994                                 SBAL_EFLAGS_MIDDLE_FRAG;
3995                 }
3996                 data += length_here;
3997                 element++;
3998         }
3999
4000         /* map page frags into buffer element(s) */
4001         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4002                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4003
4004                 data = skb_frag_address(frag);
4005                 length = skb_frag_size(frag);
4006                 while (length > 0) {
4007                         length_here = PAGE_SIZE -
4008                                 ((unsigned long) data % PAGE_SIZE);
4009                         if (length < length_here)
4010                                 length_here = length;
4011
4012                         buffer->element[element].addr = data;
4013                         buffer->element[element].length = length_here;
4014                         buffer->element[element].eflags =
4015                                 SBAL_EFLAGS_MIDDLE_FRAG;
4016                         length -= length_here;
4017                         data += length_here;
4018                         element++;
4019                 }
4020         }
4021
4022         if (buffer->element[element - 1].eflags)
4023                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4024         buf->next_element_to_fill = element;
4025 }
4026
4027 /**
4028  * qeth_fill_buffer() - map skb into an output buffer
4029  * @queue:      QDIO queue to submit the buffer on
4030  * @buf:        buffer to transport the skb
4031  * @skb:        skb to map into the buffer
4032  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4033  *              from qeth_core_header_cache.
4034  * @offset:     when mapping the skb, start at skb->data + offset
4035  * @hd_len:     if > 0, build a dedicated header element of this size
4036  */
4037 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
4038                             struct qeth_qdio_out_buffer *buf,
4039                             struct sk_buff *skb, struct qeth_hdr *hdr,
4040                             unsigned int offset, unsigned int hd_len)
4041 {
4042         struct qdio_buffer *buffer = buf->buffer;
4043         bool is_first_elem = true;
4044         int flush_cnt = 0;
4045
4046         refcount_inc(&skb->users);
4047         skb_queue_tail(&buf->skb_list, skb);
4048
4049         /* build dedicated header element */
4050         if (hd_len) {
4051                 int element = buf->next_element_to_fill;
4052                 is_first_elem = false;
4053
4054                 buffer->element[element].addr = hdr;
4055                 buffer->element[element].length = hd_len;
4056                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4057                 /* remember to free cache-allocated qeth_hdr: */
4058                 buf->is_header[element] = ((void *)hdr != skb->data);
4059                 buf->next_element_to_fill++;
4060         }
4061
4062         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
4063
4064         if (!queue->do_pack) {
4065                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
4066                 /* set state to PRIMED -> will be flushed */
4067                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4068                 flush_cnt = 1;
4069         } else {
4070                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
4071                 if (queue->card->options.performance_stats)
4072                         queue->card->perf_stats.skbs_sent_pack++;
4073                 if (buf->next_element_to_fill >=
4074                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
4075                         /*
4076                          * packed buffer if full -> set state PRIMED
4077                          * -> will be flushed
4078                          */
4079                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
4080                         flush_cnt = 1;
4081                 }
4082         }
4083         return flush_cnt;
4084 }
4085
4086 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
4087                              struct qeth_hdr *hdr, unsigned int offset,
4088                              unsigned int hd_len)
4089 {
4090         int index = queue->next_buf_to_fill;
4091         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
4092
4093         /*
4094          * check if buffer is empty to make sure that we do not 'overtake'
4095          * ourselves and try to fill a buffer that is already primed
4096          */
4097         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4098                 return -EBUSY;
4099         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
4100         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4101         qeth_flush_buffers(queue, index, 1);
4102         return 0;
4103 }
4104 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
4105
4106 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4107                         struct sk_buff *skb, struct qeth_hdr *hdr,
4108                         unsigned int offset, unsigned int hd_len,
4109                         int elements_needed)
4110 {
4111         struct qeth_qdio_out_buffer *buffer;
4112         int start_index;
4113         int flush_count = 0;
4114         int do_pack = 0;
4115         int tmp;
4116         int rc = 0;
4117
4118         /* spin until we get the queue ... */
4119         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4120                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4121         start_index = queue->next_buf_to_fill;
4122         buffer = queue->bufs[queue->next_buf_to_fill];
4123         /*
4124          * check if buffer is empty to make sure that we do not 'overtake'
4125          * ourselves and try to fill a buffer that is already primed
4126          */
4127         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4128                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4129                 return -EBUSY;
4130         }
4131         /* check if we need to switch packing state of this queue */
4132         qeth_switch_to_packing_if_needed(queue);
4133         if (queue->do_pack) {
4134                 do_pack = 1;
4135                 /* does packet fit in current buffer? */
4136                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4137                     buffer->next_element_to_fill) < elements_needed) {
4138                         /* ... no -> set state PRIMED */
4139                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4140                         flush_count++;
4141                         queue->next_buf_to_fill =
4142                                 (queue->next_buf_to_fill + 1) %
4143                                 QDIO_MAX_BUFFERS_PER_Q;
4144                         buffer = queue->bufs[queue->next_buf_to_fill];
4145                         /* we did a step forward, so check buffer state
4146                          * again */
4147                         if (atomic_read(&buffer->state) !=
4148                             QETH_QDIO_BUF_EMPTY) {
4149                                 qeth_flush_buffers(queue, start_index,
4150                                                            flush_count);
4151                                 atomic_set(&queue->state,
4152                                                 QETH_OUT_Q_UNLOCKED);
4153                                 rc = -EBUSY;
4154                                 goto out;
4155                         }
4156                 }
4157         }
4158         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4159         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4160                                   QDIO_MAX_BUFFERS_PER_Q;
4161         flush_count += tmp;
4162         if (flush_count)
4163                 qeth_flush_buffers(queue, start_index, flush_count);
4164         else if (!atomic_read(&queue->set_pci_flags_count))
4165                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4166         /*
4167          * queue->state will go from LOCKED -> UNLOCKED or from
4168          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4169          * (switch packing state or flush buffer to get another pci flag out).
4170          * In that case we will enter this loop
4171          */
4172         while (atomic_dec_return(&queue->state)) {
4173                 start_index = queue->next_buf_to_fill;
4174                 /* check if we can go back to non-packing state */
4175                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4176                 /*
4177                  * check if we need to flush a packing buffer to get a pci
4178                  * flag out on the queue
4179                  */
4180                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4181                         tmp = qeth_prep_flush_pack_buffer(queue);
4182                 if (tmp) {
4183                         qeth_flush_buffers(queue, start_index, tmp);
4184                         flush_count += tmp;
4185                 }
4186         }
4187 out:
4188         /* at this point the queue is UNLOCKED again */
4189         if (queue->card->options.performance_stats && do_pack)
4190                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4191
4192         return rc;
4193 }
4194 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4195
4196 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4197                 struct qeth_reply *reply, unsigned long data)
4198 {
4199         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4200         struct qeth_ipacmd_setadpparms *setparms;
4201
4202         QETH_CARD_TEXT(card, 4, "prmadpcb");
4203
4204         setparms = &(cmd->data.setadapterparms);
4205         if (qeth_setadpparms_inspect_rc(cmd)) {
4206                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4207                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4208         }
4209         card->info.promisc_mode = setparms->data.mode;
4210         return 0;
4211 }
4212
4213 void qeth_setadp_promisc_mode(struct qeth_card *card)
4214 {
4215         enum qeth_ipa_promisc_modes mode;
4216         struct net_device *dev = card->dev;
4217         struct qeth_cmd_buffer *iob;
4218         struct qeth_ipa_cmd *cmd;
4219
4220         QETH_CARD_TEXT(card, 4, "setprom");
4221
4222         if (((dev->flags & IFF_PROMISC) &&
4223              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4224             (!(dev->flags & IFF_PROMISC) &&
4225              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4226                 return;
4227         mode = SET_PROMISC_MODE_OFF;
4228         if (dev->flags & IFF_PROMISC)
4229                 mode = SET_PROMISC_MODE_ON;
4230         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4231
4232         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4233                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4234         if (!iob)
4235                 return;
4236         cmd = __ipa_cmd(iob);
4237         cmd->data.setadapterparms.data.mode = mode;
4238         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4239 }
4240 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4241
4242 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4243 {
4244         struct qeth_card *card;
4245
4246         card = dev->ml_priv;
4247
4248         QETH_CARD_TEXT(card, 5, "getstat");
4249
4250         return &card->stats;
4251 }
4252 EXPORT_SYMBOL_GPL(qeth_get_stats);
4253
4254 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4255                 struct qeth_reply *reply, unsigned long data)
4256 {
4257         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4258
4259         QETH_CARD_TEXT(card, 4, "chgmaccb");
4260         if (qeth_setadpparms_inspect_rc(cmd))
4261                 return 0;
4262
4263         if (!card->options.layer2 ||
4264             !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4265                 ether_addr_copy(card->dev->dev_addr,
4266                                 cmd->data.setadapterparms.data.change_addr.addr);
4267                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4268         }
4269         return 0;
4270 }
4271
4272 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4273 {
4274         int rc;
4275         struct qeth_cmd_buffer *iob;
4276         struct qeth_ipa_cmd *cmd;
4277
4278         QETH_CARD_TEXT(card, 4, "chgmac");
4279
4280         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4281                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4282                                    sizeof(struct qeth_change_addr));
4283         if (!iob)
4284                 return -ENOMEM;
4285         cmd = __ipa_cmd(iob);
4286         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4287         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4288         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4289                         card->dev->dev_addr);
4290         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4291                                NULL);
4292         return rc;
4293 }
4294 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4295
4296 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4297                 struct qeth_reply *reply, unsigned long data)
4298 {
4299         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4300         struct qeth_set_access_ctrl *access_ctrl_req;
4301         int fallback = *(int *)reply->param;
4302
4303         QETH_CARD_TEXT(card, 4, "setaccb");
4304         if (cmd->hdr.return_code)
4305                 return 0;
4306         qeth_setadpparms_inspect_rc(cmd);
4307
4308         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4309         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4310         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4311         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4312                 cmd->data.setadapterparms.hdr.return_code);
4313         if (cmd->data.setadapterparms.hdr.return_code !=
4314                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4315                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%s,%d)==%d\n",
4316                                 card->gdev->dev.kobj.name,
4317                                 access_ctrl_req->subcmd_code,
4318                                 cmd->data.setadapterparms.hdr.return_code);
4319         switch (cmd->data.setadapterparms.hdr.return_code) {
4320         case SET_ACCESS_CTRL_RC_SUCCESS:
4321                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4322                         dev_info(&card->gdev->dev,
4323                             "QDIO data connection isolation is deactivated\n");
4324                 } else {
4325                         dev_info(&card->gdev->dev,
4326                             "QDIO data connection isolation is activated\n");
4327                 }
4328                 break;
4329         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4330                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already "
4331                                 "deactivated\n", dev_name(&card->gdev->dev));
4332                 if (fallback)
4333                         card->options.isolation = card->options.prev_isolation;
4334                 break;
4335         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4336                 QETH_DBF_MESSAGE(2, "%s QDIO data connection isolation already"
4337                                 " activated\n", dev_name(&card->gdev->dev));
4338                 if (fallback)
4339                         card->options.isolation = card->options.prev_isolation;
4340                 break;
4341         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4342                 dev_err(&card->gdev->dev, "Adapter does not "
4343                         "support QDIO data connection isolation\n");
4344                 break;
4345         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4346                 dev_err(&card->gdev->dev,
4347                         "Adapter is dedicated. "
4348                         "QDIO data connection isolation not supported\n");
4349                 if (fallback)
4350                         card->options.isolation = card->options.prev_isolation;
4351                 break;
4352         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4353                 dev_err(&card->gdev->dev,
4354                         "TSO does not permit QDIO data connection isolation\n");
4355                 if (fallback)
4356                         card->options.isolation = card->options.prev_isolation;
4357                 break;
4358         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4359                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4360                         "support reflective relay mode\n");
4361                 if (fallback)
4362                         card->options.isolation = card->options.prev_isolation;
4363                 break;
4364         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4365                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4366                                         "enabled at the adjacent switch port");
4367                 if (fallback)
4368                         card->options.isolation = card->options.prev_isolation;
4369                 break;
4370         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4371                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4372                                         "at the adjacent switch failed\n");
4373                 break;
4374         default:
4375                 /* this should never happen */
4376                 if (fallback)
4377                         card->options.isolation = card->options.prev_isolation;
4378                 break;
4379         }
4380         return 0;
4381 }
4382
4383 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4384                 enum qeth_ipa_isolation_modes isolation, int fallback)
4385 {
4386         int rc;
4387         struct qeth_cmd_buffer *iob;
4388         struct qeth_ipa_cmd *cmd;
4389         struct qeth_set_access_ctrl *access_ctrl_req;
4390
4391         QETH_CARD_TEXT(card, 4, "setacctl");
4392
4393         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4394         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4395
4396         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4397                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4398                                    sizeof(struct qeth_set_access_ctrl));
4399         if (!iob)
4400                 return -ENOMEM;
4401         cmd = __ipa_cmd(iob);
4402         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4403         access_ctrl_req->subcmd_code = isolation;
4404
4405         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4406                                &fallback);
4407         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4408         return rc;
4409 }
4410
4411 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4412 {
4413         int rc = 0;
4414
4415         QETH_CARD_TEXT(card, 4, "setactlo");
4416
4417         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4418              card->info.type == QETH_CARD_TYPE_OSX) &&
4419              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4420                 rc = qeth_setadpparms_set_access_ctrl(card,
4421                         card->options.isolation, fallback);
4422                 if (rc) {
4423                         QETH_DBF_MESSAGE(3,
4424                                 "IPA(SET_ACCESS_CTRL,%s,%d) sent failed\n",
4425                                 card->gdev->dev.kobj.name,
4426                                 rc);
4427                         rc = -EOPNOTSUPP;
4428                 }
4429         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4430                 card->options.isolation = ISOLATION_MODE_NONE;
4431
4432                 dev_err(&card->gdev->dev, "Adapter does not "
4433                         "support QDIO data connection isolation\n");
4434                 rc = -EOPNOTSUPP;
4435         }
4436         return rc;
4437 }
4438 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4439
4440 void qeth_tx_timeout(struct net_device *dev)
4441 {
4442         struct qeth_card *card;
4443
4444         card = dev->ml_priv;
4445         QETH_CARD_TEXT(card, 4, "txtimeo");
4446         card->stats.tx_errors++;
4447         qeth_schedule_recovery(card);
4448 }
4449 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4450
4451 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4452 {
4453         struct qeth_card *card = dev->ml_priv;
4454         int rc = 0;
4455
4456         switch (regnum) {
4457         case MII_BMCR: /* Basic mode control register */
4458                 rc = BMCR_FULLDPLX;
4459                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4460                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4461                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4462                         rc |= BMCR_SPEED100;
4463                 break;
4464         case MII_BMSR: /* Basic mode status register */
4465                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4466                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4467                      BMSR_100BASE4;
4468                 break;
4469         case MII_PHYSID1: /* PHYS ID 1 */
4470                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4471                      dev->dev_addr[2];
4472                 rc = (rc >> 5) & 0xFFFF;
4473                 break;
4474         case MII_PHYSID2: /* PHYS ID 2 */
4475                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4476                 break;
4477         case MII_ADVERTISE: /* Advertisement control reg */
4478                 rc = ADVERTISE_ALL;
4479                 break;
4480         case MII_LPA: /* Link partner ability reg */
4481                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4482                      LPA_100BASE4 | LPA_LPACK;
4483                 break;
4484         case MII_EXPANSION: /* Expansion register */
4485                 break;
4486         case MII_DCOUNTER: /* disconnect counter */
4487                 break;
4488         case MII_FCSCOUNTER: /* false carrier counter */
4489                 break;
4490         case MII_NWAYTEST: /* N-way auto-neg test register */
4491                 break;
4492         case MII_RERRCOUNTER: /* rx error counter */
4493                 rc = card->stats.rx_errors;
4494                 break;
4495         case MII_SREVISION: /* silicon revision */
4496                 break;
4497         case MII_RESV1: /* reserved 1 */
4498                 break;
4499         case MII_LBRERROR: /* loopback, rx, bypass error */
4500                 break;
4501         case MII_PHYADDR: /* physical address */
4502                 break;
4503         case MII_RESV2: /* reserved 2 */
4504                 break;
4505         case MII_TPISTATUS: /* TPI status for 10mbps */
4506                 break;
4507         case MII_NCONFIG: /* network interface config */
4508                 break;
4509         default:
4510                 break;
4511         }
4512         return rc;
4513 }
4514
4515 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4516                 struct qeth_cmd_buffer *iob, int len,
4517                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4518                         unsigned long),
4519                 void *reply_param)
4520 {
4521         u16 s1, s2;
4522
4523         QETH_CARD_TEXT(card, 4, "sendsnmp");
4524
4525         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4526         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4527                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4528         /* adjust PDU length fields in IPA_PDU_HEADER */
4529         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4530         s2 = (u32) len;
4531         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4532         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4533         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4534         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4535         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4536                                       reply_cb, reply_param);
4537 }
4538
4539 static int qeth_snmp_command_cb(struct qeth_card *card,
4540                 struct qeth_reply *reply, unsigned long sdata)
4541 {
4542         struct qeth_ipa_cmd *cmd;
4543         struct qeth_arp_query_info *qinfo;
4544         unsigned char *data;
4545         void *snmp_data;
4546         __u16 data_len;
4547
4548         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4549
4550         cmd = (struct qeth_ipa_cmd *) sdata;
4551         data = (unsigned char *)((char *)cmd - reply->offset);
4552         qinfo = (struct qeth_arp_query_info *) reply->param;
4553
4554         if (cmd->hdr.return_code) {
4555                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4556                 return 0;
4557         }
4558         if (cmd->data.setadapterparms.hdr.return_code) {
4559                 cmd->hdr.return_code =
4560                         cmd->data.setadapterparms.hdr.return_code;
4561                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4562                 return 0;
4563         }
4564         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4565         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4566                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4567                 data_len -= offsetof(struct qeth_ipa_cmd,
4568                                      data.setadapterparms.data.snmp);
4569         } else {
4570                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4571                 data_len -= offsetof(struct qeth_ipa_cmd,
4572                                      data.setadapterparms.data.snmp.request);
4573         }
4574
4575         /* check if there is enough room in userspace */
4576         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4577                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4578                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4579                 return 0;
4580         }
4581         QETH_CARD_TEXT_(card, 4, "snore%i",
4582                        cmd->data.setadapterparms.hdr.used_total);
4583         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4584                 cmd->data.setadapterparms.hdr.seq_no);
4585         /*copy entries to user buffer*/
4586         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4587         qinfo->udata_offset += data_len;
4588
4589         /* check if all replies received ... */
4590                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4591                                cmd->data.setadapterparms.hdr.used_total);
4592                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4593                                cmd->data.setadapterparms.hdr.seq_no);
4594         if (cmd->data.setadapterparms.hdr.seq_no <
4595             cmd->data.setadapterparms.hdr.used_total)
4596                 return 1;
4597         return 0;
4598 }
4599
4600 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4601 {
4602         struct qeth_cmd_buffer *iob;
4603         struct qeth_ipa_cmd *cmd;
4604         struct qeth_snmp_ureq *ureq;
4605         unsigned int req_len;
4606         struct qeth_arp_query_info qinfo = {0, };
4607         int rc = 0;
4608
4609         QETH_CARD_TEXT(card, 3, "snmpcmd");
4610
4611         if (card->info.guestlan)
4612                 return -EOPNOTSUPP;
4613
4614         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4615             (!card->options.layer2)) {
4616                 return -EOPNOTSUPP;
4617         }
4618         /* skip 4 bytes (data_len struct member) to get req_len */
4619         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4620                 return -EFAULT;
4621         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4622                        sizeof(struct qeth_ipacmd_hdr) -
4623                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4624                 return -EINVAL;
4625         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4626         if (IS_ERR(ureq)) {
4627                 QETH_CARD_TEXT(card, 2, "snmpnome");
4628                 return PTR_ERR(ureq);
4629         }
4630         qinfo.udata_len = ureq->hdr.data_len;
4631         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4632         if (!qinfo.udata) {
4633                 kfree(ureq);
4634                 return -ENOMEM;
4635         }
4636         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4637
4638         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4639                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4640         if (!iob) {
4641                 rc = -ENOMEM;
4642                 goto out;
4643         }
4644         cmd = __ipa_cmd(iob);
4645         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4646         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4647                                     qeth_snmp_command_cb, (void *)&qinfo);
4648         if (rc)
4649                 QETH_DBF_MESSAGE(2, "SNMP command failed on %s: (0x%x)\n",
4650                            QETH_CARD_IFNAME(card), rc);
4651         else {
4652                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4653                         rc = -EFAULT;
4654         }
4655 out:
4656         kfree(ureq);
4657         kfree(qinfo.udata);
4658         return rc;
4659 }
4660
4661 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4662                 struct qeth_reply *reply, unsigned long data)
4663 {
4664         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4665         struct qeth_qoat_priv *priv;
4666         char *resdata;
4667         int resdatalen;
4668
4669         QETH_CARD_TEXT(card, 3, "qoatcb");
4670         if (qeth_setadpparms_inspect_rc(cmd))
4671                 return 0;
4672
4673         priv = (struct qeth_qoat_priv *)reply->param;
4674         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4675         resdata = (char *)data + 28;
4676
4677         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4678                 cmd->hdr.return_code = IPA_RC_FFFF;
4679                 return 0;
4680         }
4681
4682         memcpy((priv->buffer + priv->response_len), resdata,
4683                 resdatalen);
4684         priv->response_len += resdatalen;
4685
4686         if (cmd->data.setadapterparms.hdr.seq_no <
4687             cmd->data.setadapterparms.hdr.used_total)
4688                 return 1;
4689         return 0;
4690 }
4691
4692 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4693 {
4694         int rc = 0;
4695         struct qeth_cmd_buffer *iob;
4696         struct qeth_ipa_cmd *cmd;
4697         struct qeth_query_oat *oat_req;
4698         struct qeth_query_oat_data oat_data;
4699         struct qeth_qoat_priv priv;
4700         void __user *tmp;
4701
4702         QETH_CARD_TEXT(card, 3, "qoatcmd");
4703
4704         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4705                 rc = -EOPNOTSUPP;
4706                 goto out;
4707         }
4708
4709         if (copy_from_user(&oat_data, udata,
4710             sizeof(struct qeth_query_oat_data))) {
4711                         rc = -EFAULT;
4712                         goto out;
4713         }
4714
4715         priv.buffer_len = oat_data.buffer_len;
4716         priv.response_len = 0;
4717         priv.buffer = vzalloc(oat_data.buffer_len);
4718         if (!priv.buffer) {
4719                 rc = -ENOMEM;
4720                 goto out;
4721         }
4722
4723         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4724                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4725                                    sizeof(struct qeth_query_oat));
4726         if (!iob) {
4727                 rc = -ENOMEM;
4728                 goto out_free;
4729         }
4730         cmd = __ipa_cmd(iob);
4731         oat_req = &cmd->data.setadapterparms.data.query_oat;
4732         oat_req->subcmd_code = oat_data.command;
4733
4734         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4735                                &priv);
4736         if (!rc) {
4737                 if (is_compat_task())
4738                         tmp = compat_ptr(oat_data.ptr);
4739                 else
4740                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4741
4742                 if (copy_to_user(tmp, priv.buffer,
4743                     priv.response_len)) {
4744                         rc = -EFAULT;
4745                         goto out_free;
4746                 }
4747
4748                 oat_data.response_len = priv.response_len;
4749
4750                 if (copy_to_user(udata, &oat_data,
4751                     sizeof(struct qeth_query_oat_data)))
4752                         rc = -EFAULT;
4753         } else
4754                 if (rc == IPA_RC_FFFF)
4755                         rc = -EFAULT;
4756
4757 out_free:
4758         vfree(priv.buffer);
4759 out:
4760         return rc;
4761 }
4762
4763 static int qeth_query_card_info_cb(struct qeth_card *card,
4764                                    struct qeth_reply *reply, unsigned long data)
4765 {
4766         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4767         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4768         struct qeth_query_card_info *card_info;
4769
4770         QETH_CARD_TEXT(card, 2, "qcrdincb");
4771         if (qeth_setadpparms_inspect_rc(cmd))
4772                 return 0;
4773
4774         card_info = &cmd->data.setadapterparms.data.card_info;
4775         carrier_info->card_type = card_info->card_type;
4776         carrier_info->port_mode = card_info->port_mode;
4777         carrier_info->port_speed = card_info->port_speed;
4778         return 0;
4779 }
4780
4781 static int qeth_query_card_info(struct qeth_card *card,
4782                                 struct carrier_info *carrier_info)
4783 {
4784         struct qeth_cmd_buffer *iob;
4785
4786         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4787         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4788                 return -EOPNOTSUPP;
4789         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4790                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4791         if (!iob)
4792                 return -ENOMEM;
4793         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4794                                         (void *)carrier_info);
4795 }
4796
4797 /**
4798  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4799  * @card: pointer to a qeth_card
4800  *
4801  * Returns
4802  *      0, if a MAC address has been set for the card's netdevice
4803  *      a return code, for various error conditions
4804  */
4805 int qeth_vm_request_mac(struct qeth_card *card)
4806 {
4807         struct diag26c_mac_resp *response;
4808         struct diag26c_mac_req *request;
4809         struct ccw_dev_id id;
4810         int rc;
4811
4812         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4813
4814         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4815         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4816         if (!request || !response) {
4817                 rc = -ENOMEM;
4818                 goto out;
4819         }
4820
4821         ccw_device_get_id(CARD_DDEV(card), &id);
4822         request->resp_buf_len = sizeof(*response);
4823         request->resp_version = DIAG26C_VERSION2;
4824         request->op_code = DIAG26C_GET_MAC;
4825         request->devno = id.devno;
4826
4827         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4828         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4829         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4830         if (rc)
4831                 goto out;
4832         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4833
4834         if (request->resp_buf_len < sizeof(*response) ||
4835             response->version != request->resp_version) {
4836                 rc = -EIO;
4837                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4838                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4839                              sizeof(request->resp_buf_len));
4840         } else if (!is_valid_ether_addr(response->mac)) {
4841                 rc = -EINVAL;
4842                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4843                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4844         } else {
4845                 ether_addr_copy(card->dev->dev_addr, response->mac);
4846         }
4847
4848 out:
4849         kfree(response);
4850         kfree(request);
4851         return rc;
4852 }
4853 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4854
4855 static int qeth_get_qdio_q_format(struct qeth_card *card)
4856 {
4857         if (card->info.type == QETH_CARD_TYPE_IQD)
4858                 return QDIO_IQDIO_QFMT;
4859         else
4860                 return QDIO_QETH_QFMT;
4861 }
4862
4863 static void qeth_determine_capabilities(struct qeth_card *card)
4864 {
4865         int rc;
4866         int length;
4867         char *prcd;
4868         struct ccw_device *ddev;
4869         int ddev_offline = 0;
4870
4871         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4872         ddev = CARD_DDEV(card);
4873         if (!ddev->online) {
4874                 ddev_offline = 1;
4875                 rc = ccw_device_set_online(ddev);
4876                 if (rc) {
4877                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4878                         goto out;
4879                 }
4880         }
4881
4882         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4883         if (rc) {
4884                 QETH_DBF_MESSAGE(2, "%s qeth_read_conf_data returned %i\n",
4885                         dev_name(&card->gdev->dev), rc);
4886                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4887                 goto out_offline;
4888         }
4889         qeth_configure_unitaddr(card, prcd);
4890         if (ddev_offline)
4891                 qeth_configure_blkt_default(card, prcd);
4892         kfree(prcd);
4893
4894         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4895         if (rc)
4896                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4897
4898         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4899         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4900         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4901         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4902         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4903         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4904             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4905             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4906                 dev_info(&card->gdev->dev,
4907                         "Completion Queueing supported\n");
4908         } else {
4909                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4910         }
4911
4912
4913 out_offline:
4914         if (ddev_offline == 1)
4915                 ccw_device_set_offline(ddev);
4916 out:
4917         return;
4918 }
4919
4920 static void qeth_qdio_establish_cq(struct qeth_card *card,
4921                                    struct qdio_buffer **in_sbal_ptrs,
4922                                    void (**queue_start_poll)
4923                                         (struct ccw_device *, int,
4924                                          unsigned long))
4925 {
4926         int i;
4927
4928         if (card->options.cq == QETH_CQ_ENABLED) {
4929                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4930                              (card->qdio.no_in_queues - 1);
4931
4932                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++)
4933                         in_sbal_ptrs[offset + i] =
4934                                 card->qdio.c_q->bufs[i].buffer;
4935
4936                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4937         }
4938 }
4939
4940 static int qeth_qdio_establish(struct qeth_card *card)
4941 {
4942         struct qdio_initialize init_data;
4943         char *qib_param_field;
4944         struct qdio_buffer **in_sbal_ptrs;
4945         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4946         struct qdio_buffer **out_sbal_ptrs;
4947         int i, j, k;
4948         int rc = 0;
4949
4950         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4951
4952         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4953                                   GFP_KERNEL);
4954         if (!qib_param_field) {
4955                 rc =  -ENOMEM;
4956                 goto out_free_nothing;
4957         }
4958
4959         qeth_create_qib_param_field(card, qib_param_field);
4960         qeth_create_qib_param_field_blkt(card, qib_param_field);
4961
4962         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4963                                sizeof(void *),
4964                                GFP_KERNEL);
4965         if (!in_sbal_ptrs) {
4966                 rc = -ENOMEM;
4967                 goto out_free_qib_param;
4968         }
4969
4970         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++)
4971                 in_sbal_ptrs[i] = card->qdio.in_q->bufs[i].buffer;
4972
4973         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4974                                    GFP_KERNEL);
4975         if (!queue_start_poll) {
4976                 rc = -ENOMEM;
4977                 goto out_free_in_sbals;
4978         }
4979         for (i = 0; i < card->qdio.no_in_queues; ++i)
4980                 queue_start_poll[i] = qeth_qdio_start_poll;
4981
4982         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4983
4984         out_sbal_ptrs =
4985                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4986                         sizeof(void *),
4987                         GFP_KERNEL);
4988         if (!out_sbal_ptrs) {
4989                 rc = -ENOMEM;
4990                 goto out_free_queue_start_poll;
4991         }
4992
4993         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4994                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++, k++)
4995                         out_sbal_ptrs[k] =
4996                                 card->qdio.out_qs[i]->bufs[j]->buffer;
4997
4998         memset(&init_data, 0, sizeof(struct qdio_initialize));
4999         init_data.cdev                   = CARD_DDEV(card);
5000         init_data.q_format               = qeth_get_qdio_q_format(card);
5001         init_data.qib_param_field_format = 0;
5002         init_data.qib_param_field        = qib_param_field;
5003         init_data.no_input_qs            = card->qdio.no_in_queues;
5004         init_data.no_output_qs           = card->qdio.no_out_queues;
5005         init_data.input_handler          = qeth_qdio_input_handler;
5006         init_data.output_handler         = qeth_qdio_output_handler;
5007         init_data.queue_start_poll_array = queue_start_poll;
5008         init_data.int_parm               = (unsigned long) card;
5009         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
5010         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
5011         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5012         init_data.scan_threshold =
5013                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
5014
5015         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5016                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5017                 rc = qdio_allocate(&init_data);
5018                 if (rc) {
5019                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5020                         goto out;
5021                 }
5022                 rc = qdio_establish(&init_data);
5023                 if (rc) {
5024                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5025                         qdio_free(CARD_DDEV(card));
5026                 }
5027         }
5028
5029         switch (card->options.cq) {
5030         case QETH_CQ_ENABLED:
5031                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5032                 break;
5033         case QETH_CQ_DISABLED:
5034                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5035                 break;
5036         default:
5037                 break;
5038         }
5039 out:
5040         kfree(out_sbal_ptrs);
5041 out_free_queue_start_poll:
5042         kfree(queue_start_poll);
5043 out_free_in_sbals:
5044         kfree(in_sbal_ptrs);
5045 out_free_qib_param:
5046         kfree(qib_param_field);
5047 out_free_nothing:
5048         return rc;
5049 }
5050
5051 static void qeth_core_free_card(struct qeth_card *card)
5052 {
5053         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5054         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5055         qeth_clean_channel(&card->read);
5056         qeth_clean_channel(&card->write);
5057         qeth_clean_channel(&card->data);
5058         qeth_free_qdio_buffers(card);
5059         unregister_service_level(&card->qeth_service_level);
5060         kfree(card);
5061 }
5062
5063 void qeth_trace_features(struct qeth_card *card)
5064 {
5065         QETH_CARD_TEXT(card, 2, "features");
5066         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5067         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5068         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5069         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5070                       sizeof(card->info.diagass_support));
5071 }
5072 EXPORT_SYMBOL_GPL(qeth_trace_features);
5073
5074 static struct ccw_device_id qeth_ids[] = {
5075         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5076                                         .driver_info = QETH_CARD_TYPE_OSD},
5077         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5078                                         .driver_info = QETH_CARD_TYPE_IQD},
5079         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5080                                         .driver_info = QETH_CARD_TYPE_OSN},
5081         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5082                                         .driver_info = QETH_CARD_TYPE_OSM},
5083         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5084                                         .driver_info = QETH_CARD_TYPE_OSX},
5085         {},
5086 };
5087 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5088
5089 static struct ccw_driver qeth_ccw_driver = {
5090         .driver = {
5091                 .owner = THIS_MODULE,
5092                 .name = "qeth",
5093         },
5094         .ids = qeth_ids,
5095         .probe = ccwgroup_probe_ccwdev,
5096         .remove = ccwgroup_remove_ccwdev,
5097 };
5098
5099 int qeth_core_hardsetup_card(struct qeth_card *card)
5100 {
5101         int retries = 3;
5102         int rc;
5103
5104         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5105         atomic_set(&card->force_alloc_skb, 0);
5106         rc = qeth_update_from_chp_desc(card);
5107         if (rc)
5108                 return rc;
5109 retry:
5110         if (retries < 3)
5111                 QETH_DBF_MESSAGE(2, "%s Retrying to do IDX activates.\n",
5112                         dev_name(&card->gdev->dev));
5113         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5114         ccw_device_set_offline(CARD_DDEV(card));
5115         ccw_device_set_offline(CARD_WDEV(card));
5116         ccw_device_set_offline(CARD_RDEV(card));
5117         qdio_free(CARD_DDEV(card));
5118         rc = ccw_device_set_online(CARD_RDEV(card));
5119         if (rc)
5120                 goto retriable;
5121         rc = ccw_device_set_online(CARD_WDEV(card));
5122         if (rc)
5123                 goto retriable;
5124         rc = ccw_device_set_online(CARD_DDEV(card));
5125         if (rc)
5126                 goto retriable;
5127 retriable:
5128         if (rc == -ERESTARTSYS) {
5129                 QETH_DBF_TEXT(SETUP, 2, "break1");
5130                 return rc;
5131         } else if (rc) {
5132                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5133                 if (--retries < 0)
5134                         goto out;
5135                 else
5136                         goto retry;
5137         }
5138         qeth_determine_capabilities(card);
5139         qeth_init_tokens(card);
5140         qeth_init_func_level(card);
5141         rc = qeth_idx_activate_channel(&card->read, qeth_idx_read_cb);
5142         if (rc == -ERESTARTSYS) {
5143                 QETH_DBF_TEXT(SETUP, 2, "break2");
5144                 return rc;
5145         } else if (rc) {
5146                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5147                 if (--retries < 0)
5148                         goto out;
5149                 else
5150                         goto retry;
5151         }
5152         rc = qeth_idx_activate_channel(&card->write, qeth_idx_write_cb);
5153         if (rc == -ERESTARTSYS) {
5154                 QETH_DBF_TEXT(SETUP, 2, "break3");
5155                 return rc;
5156         } else if (rc) {
5157                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5158                 if (--retries < 0)
5159                         goto out;
5160                 else
5161                         goto retry;
5162         }
5163         card->read_or_write_problem = 0;
5164         rc = qeth_mpc_initialize(card);
5165         if (rc) {
5166                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5167                 goto out;
5168         }
5169
5170         rc = qeth_send_startlan(card);
5171         if (rc) {
5172                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5173                 if (rc == IPA_RC_LAN_OFFLINE) {
5174                         dev_warn(&card->gdev->dev,
5175                                 "The LAN is offline\n");
5176                         card->lan_online = 0;
5177                 } else {
5178                         rc = -ENODEV;
5179                         goto out;
5180                 }
5181         } else
5182                 card->lan_online = 1;
5183
5184         card->options.ipa4.supported_funcs = 0;
5185         card->options.ipa6.supported_funcs = 0;
5186         card->options.adp.supported_funcs = 0;
5187         card->options.sbp.supported_funcs = 0;
5188         card->info.diagass_support = 0;
5189         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5190         if (rc == -ENOMEM)
5191                 goto out;
5192         if (qeth_is_supported(card, IPA_IPV6)) {
5193                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5194                 if (rc == -ENOMEM)
5195                         goto out;
5196         }
5197         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5198                 rc = qeth_query_setadapterparms(card);
5199                 if (rc < 0) {
5200                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5201                         goto out;
5202                 }
5203         }
5204         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5205                 rc = qeth_query_setdiagass(card);
5206                 if (rc < 0) {
5207                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5208                         goto out;
5209                 }
5210         }
5211         return 0;
5212 out:
5213         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5214                 "an error on the device\n");
5215         QETH_DBF_MESSAGE(2, "%s Initialization in hardsetup failed! rc=%d\n",
5216                 dev_name(&card->gdev->dev), rc);
5217         return rc;
5218 }
5219 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5220
5221 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5222                                  struct sk_buff *skb, int offset, int data_len)
5223 {
5224         struct page *page = virt_to_page(element->addr);
5225         unsigned int next_frag;
5226
5227         /* first fill the linear space */
5228         if (!skb->len) {
5229                 unsigned int linear = min(data_len, skb_tailroom(skb));
5230
5231                 skb_put_data(skb, element->addr + offset, linear);
5232                 data_len -= linear;
5233                 if (!data_len)
5234                         return;
5235                 offset += linear;
5236                 /* fall through to add page frag for remaining data */
5237         }
5238
5239         next_frag = skb_shinfo(skb)->nr_frags;
5240         get_page(page);
5241         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5242 }
5243
5244 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5245 {
5246         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5247 }
5248
5249 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5250                 struct qeth_qdio_buffer *qethbuffer,
5251                 struct qdio_buffer_element **__element, int *__offset,
5252                 struct qeth_hdr **hdr)
5253 {
5254         struct qdio_buffer_element *element = *__element;
5255         struct qdio_buffer *buffer = qethbuffer->buffer;
5256         int offset = *__offset;
5257         struct sk_buff *skb;
5258         int skb_len = 0;
5259         void *data_ptr;
5260         int data_len;
5261         int headroom = 0;
5262         int use_rx_sg = 0;
5263
5264         /* qeth_hdr must not cross element boundaries */
5265         while (element->length < offset + sizeof(struct qeth_hdr)) {
5266                 if (qeth_is_last_sbale(element))
5267                         return NULL;
5268                 element++;
5269                 offset = 0;
5270         }
5271         *hdr = element->addr + offset;
5272
5273         offset += sizeof(struct qeth_hdr);
5274         switch ((*hdr)->hdr.l2.id) {
5275         case QETH_HEADER_TYPE_LAYER2:
5276                 skb_len = (*hdr)->hdr.l2.pkt_length;
5277                 break;
5278         case QETH_HEADER_TYPE_LAYER3:
5279                 skb_len = (*hdr)->hdr.l3.length;
5280                 headroom = ETH_HLEN;
5281                 break;
5282         case QETH_HEADER_TYPE_OSN:
5283                 skb_len = (*hdr)->hdr.osn.pdu_length;
5284                 headroom = sizeof(struct qeth_hdr);
5285                 break;
5286         default:
5287                 break;
5288         }
5289
5290         if (!skb_len)
5291                 return NULL;
5292
5293         if (((skb_len >= card->options.rx_sg_cb) &&
5294              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5295              (!atomic_read(&card->force_alloc_skb))) ||
5296             (card->options.cq == QETH_CQ_ENABLED))
5297                 use_rx_sg = 1;
5298
5299         if (use_rx_sg && qethbuffer->rx_skb) {
5300                 /* QETH_CQ_ENABLED only: */
5301                 skb = qethbuffer->rx_skb;
5302                 qethbuffer->rx_skb = NULL;
5303         } else {
5304                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5305
5306                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5307         }
5308         if (!skb)
5309                 goto no_mem;
5310         if (headroom)
5311                 skb_reserve(skb, headroom);
5312
5313         data_ptr = element->addr + offset;
5314         while (skb_len) {
5315                 data_len = min(skb_len, (int)(element->length - offset));
5316                 if (data_len) {
5317                         if (use_rx_sg)
5318                                 qeth_create_skb_frag(element, skb, offset,
5319                                                      data_len);
5320                         else
5321                                 skb_put_data(skb, data_ptr, data_len);
5322                 }
5323                 skb_len -= data_len;
5324                 if (skb_len) {
5325                         if (qeth_is_last_sbale(element)) {
5326                                 QETH_CARD_TEXT(card, 4, "unexeob");
5327                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5328                                 dev_kfree_skb_any(skb);
5329                                 card->stats.rx_errors++;
5330                                 return NULL;
5331                         }
5332                         element++;
5333                         offset = 0;
5334                         data_ptr = element->addr;
5335                 } else {
5336                         offset += data_len;
5337                 }
5338         }
5339         *__element = element;
5340         *__offset = offset;
5341         if (use_rx_sg && card->options.performance_stats) {
5342                 card->perf_stats.sg_skbs_rx++;
5343                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5344         }
5345         return skb;
5346 no_mem:
5347         if (net_ratelimit()) {
5348                 QETH_CARD_TEXT(card, 2, "noskbmem");
5349         }
5350         card->stats.rx_dropped++;
5351         return NULL;
5352 }
5353 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5354
5355 int qeth_poll(struct napi_struct *napi, int budget)
5356 {
5357         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5358         int work_done = 0;
5359         struct qeth_qdio_buffer *buffer;
5360         int done;
5361         int new_budget = budget;
5362
5363         if (card->options.performance_stats) {
5364                 card->perf_stats.inbound_cnt++;
5365                 card->perf_stats.inbound_start_time = qeth_get_micros();
5366         }
5367
5368         while (1) {
5369                 if (!card->rx.b_count) {
5370                         card->rx.qdio_err = 0;
5371                         card->rx.b_count = qdio_get_next_buffers(
5372                                 card->data.ccwdev, 0, &card->rx.b_index,
5373                                 &card->rx.qdio_err);
5374                         if (card->rx.b_count <= 0) {
5375                                 card->rx.b_count = 0;
5376                                 break;
5377                         }
5378                         card->rx.b_element =
5379                                 &card->qdio.in_q->bufs[card->rx.b_index]
5380                                 .buffer->element[0];
5381                         card->rx.e_offset = 0;
5382                 }
5383
5384                 while (card->rx.b_count) {
5385                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5386                         if (!(card->rx.qdio_err &&
5387                             qeth_check_qdio_errors(card, buffer->buffer,
5388                             card->rx.qdio_err, "qinerr")))
5389                                 work_done +=
5390                                         card->discipline->process_rx_buffer(
5391                                                 card, new_budget, &done);
5392                         else
5393                                 done = 1;
5394
5395                         if (done) {
5396                                 if (card->options.performance_stats)
5397                                         card->perf_stats.bufs_rec++;
5398                                 qeth_put_buffer_pool_entry(card,
5399                                         buffer->pool_entry);
5400                                 qeth_queue_input_buffer(card, card->rx.b_index);
5401                                 card->rx.b_count--;
5402                                 if (card->rx.b_count) {
5403                                         card->rx.b_index =
5404                                                 (card->rx.b_index + 1) %
5405                                                 QDIO_MAX_BUFFERS_PER_Q;
5406                                         card->rx.b_element =
5407                                                 &card->qdio.in_q
5408                                                 ->bufs[card->rx.b_index]
5409                                                 .buffer->element[0];
5410                                         card->rx.e_offset = 0;
5411                                 }
5412                         }
5413
5414                         if (work_done >= budget)
5415                                 goto out;
5416                         else
5417                                 new_budget = budget - work_done;
5418                 }
5419         }
5420
5421         napi_complete_done(napi, work_done);
5422         if (qdio_start_irq(card->data.ccwdev, 0))
5423                 napi_schedule(&card->napi);
5424 out:
5425         if (card->options.performance_stats)
5426                 card->perf_stats.inbound_time += qeth_get_micros() -
5427                         card->perf_stats.inbound_start_time;
5428         return work_done;
5429 }
5430 EXPORT_SYMBOL_GPL(qeth_poll);
5431
5432 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5433 {
5434         if (!cmd->hdr.return_code)
5435                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5436         return cmd->hdr.return_code;
5437 }
5438
5439 int qeth_setassparms_cb(struct qeth_card *card,
5440                         struct qeth_reply *reply, unsigned long data)
5441 {
5442         struct qeth_ipa_cmd *cmd;
5443
5444         QETH_CARD_TEXT(card, 4, "defadpcb");
5445
5446         cmd = (struct qeth_ipa_cmd *) data;
5447         if (cmd->hdr.return_code == 0) {
5448                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5449                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5450                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5451                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5452                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5453         }
5454         return 0;
5455 }
5456 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5457
5458 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5459                                                  enum qeth_ipa_funcs ipa_func,
5460                                                  __u16 cmd_code, __u16 len,
5461                                                  enum qeth_prot_versions prot)
5462 {
5463         struct qeth_cmd_buffer *iob;
5464         struct qeth_ipa_cmd *cmd;
5465
5466         QETH_CARD_TEXT(card, 4, "getasscm");
5467         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5468
5469         if (iob) {
5470                 cmd = __ipa_cmd(iob);
5471                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5472                 cmd->data.setassparms.hdr.length = 8 + len;
5473                 cmd->data.setassparms.hdr.command_code = cmd_code;
5474                 cmd->data.setassparms.hdr.return_code = 0;
5475                 cmd->data.setassparms.hdr.seq_no = 0;
5476         }
5477
5478         return iob;
5479 }
5480 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5481
5482 int qeth_send_setassparms(struct qeth_card *card,
5483                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5484                           int (*reply_cb)(struct qeth_card *,
5485                                           struct qeth_reply *, unsigned long),
5486                           void *reply_param)
5487 {
5488         int rc;
5489         struct qeth_ipa_cmd *cmd;
5490
5491         QETH_CARD_TEXT(card, 4, "sendassp");
5492
5493         cmd = __ipa_cmd(iob);
5494         if (len <= sizeof(__u32))
5495                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5496         else   /* (len > sizeof(__u32)) */
5497                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5498
5499         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5500         return rc;
5501 }
5502 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5503
5504 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5505                                       enum qeth_ipa_funcs ipa_func,
5506                                       u16 cmd_code, long data,
5507                                       enum qeth_prot_versions prot)
5508 {
5509         int rc;
5510         int length = 0;
5511         struct qeth_cmd_buffer *iob;
5512
5513         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5514         if (data)
5515                 length = sizeof(__u32);
5516         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5517         if (!iob)
5518                 return -ENOMEM;
5519         rc = qeth_send_setassparms(card, iob, length, data,
5520                                    qeth_setassparms_cb, NULL);
5521         return rc;
5522 }
5523 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5524
5525 static void qeth_unregister_dbf_views(void)
5526 {
5527         int x;
5528         for (x = 0; x < QETH_DBF_INFOS; x++) {
5529                 debug_unregister(qeth_dbf[x].id);
5530                 qeth_dbf[x].id = NULL;
5531         }
5532 }
5533
5534 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5535 {
5536         char dbf_txt_buf[32];
5537         va_list args;
5538
5539         if (!debug_level_enabled(id, level))
5540                 return;
5541         va_start(args, fmt);
5542         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5543         va_end(args);
5544         debug_text_event(id, level, dbf_txt_buf);
5545 }
5546 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5547
5548 static int qeth_register_dbf_views(void)
5549 {
5550         int ret;
5551         int x;
5552
5553         for (x = 0; x < QETH_DBF_INFOS; x++) {
5554                 /* register the areas */
5555                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5556                                                 qeth_dbf[x].pages,
5557                                                 qeth_dbf[x].areas,
5558                                                 qeth_dbf[x].len);
5559                 if (qeth_dbf[x].id == NULL) {
5560                         qeth_unregister_dbf_views();
5561                         return -ENOMEM;
5562                 }
5563
5564                 /* register a view */
5565                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5566                 if (ret) {
5567                         qeth_unregister_dbf_views();
5568                         return ret;
5569                 }
5570
5571                 /* set a passing level */
5572                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5573         }
5574
5575         return 0;
5576 }
5577
5578 int qeth_core_load_discipline(struct qeth_card *card,
5579                 enum qeth_discipline_id discipline)
5580 {
5581         int rc = 0;
5582
5583         mutex_lock(&qeth_mod_mutex);
5584         switch (discipline) {
5585         case QETH_DISCIPLINE_LAYER3:
5586                 card->discipline = try_then_request_module(
5587                         symbol_get(qeth_l3_discipline), "qeth_l3");
5588                 break;
5589         case QETH_DISCIPLINE_LAYER2:
5590                 card->discipline = try_then_request_module(
5591                         symbol_get(qeth_l2_discipline), "qeth_l2");
5592                 break;
5593         default:
5594                 break;
5595         }
5596
5597         if (!card->discipline) {
5598                 dev_err(&card->gdev->dev, "There is no kernel module to "
5599                         "support discipline %d\n", discipline);
5600                 rc = -EINVAL;
5601         }
5602         mutex_unlock(&qeth_mod_mutex);
5603         return rc;
5604 }
5605
5606 void qeth_core_free_discipline(struct qeth_card *card)
5607 {
5608         if (card->options.layer2)
5609                 symbol_put(qeth_l2_discipline);
5610         else
5611                 symbol_put(qeth_l3_discipline);
5612         card->discipline = NULL;
5613 }
5614
5615 const struct device_type qeth_generic_devtype = {
5616         .name = "qeth_generic",
5617         .groups = qeth_generic_attr_groups,
5618 };
5619 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5620
5621 static const struct device_type qeth_osn_devtype = {
5622         .name = "qeth_osn",
5623         .groups = qeth_osn_attr_groups,
5624 };
5625
5626 #define DBF_NAME_LEN    20
5627
5628 struct qeth_dbf_entry {
5629         char dbf_name[DBF_NAME_LEN];
5630         debug_info_t *dbf_info;
5631         struct list_head dbf_list;
5632 };
5633
5634 static LIST_HEAD(qeth_dbf_list);
5635 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5636
5637 static debug_info_t *qeth_get_dbf_entry(char *name)
5638 {
5639         struct qeth_dbf_entry *entry;
5640         debug_info_t *rc = NULL;
5641
5642         mutex_lock(&qeth_dbf_list_mutex);
5643         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5644                 if (strcmp(entry->dbf_name, name) == 0) {
5645                         rc = entry->dbf_info;
5646                         break;
5647                 }
5648         }
5649         mutex_unlock(&qeth_dbf_list_mutex);
5650         return rc;
5651 }
5652
5653 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5654 {
5655         struct qeth_dbf_entry *new_entry;
5656
5657         card->debug = debug_register(name, 2, 1, 8);
5658         if (!card->debug) {
5659                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5660                 goto err;
5661         }
5662         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5663                 goto err_dbg;
5664         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5665         if (!new_entry)
5666                 goto err_dbg;
5667         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5668         new_entry->dbf_info = card->debug;
5669         mutex_lock(&qeth_dbf_list_mutex);
5670         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5671         mutex_unlock(&qeth_dbf_list_mutex);
5672
5673         return 0;
5674
5675 err_dbg:
5676         debug_unregister(card->debug);
5677 err:
5678         return -ENOMEM;
5679 }
5680
5681 static void qeth_clear_dbf_list(void)
5682 {
5683         struct qeth_dbf_entry *entry, *tmp;
5684
5685         mutex_lock(&qeth_dbf_list_mutex);
5686         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5687                 list_del(&entry->dbf_list);
5688                 debug_unregister(entry->dbf_info);
5689                 kfree(entry);
5690         }
5691         mutex_unlock(&qeth_dbf_list_mutex);
5692 }
5693
5694 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5695 {
5696         struct net_device *dev;
5697
5698         switch (card->info.type) {
5699         case QETH_CARD_TYPE_IQD:
5700                 dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);
5701                 break;
5702         case QETH_CARD_TYPE_OSN:
5703                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5704                 break;
5705         default:
5706                 dev = alloc_etherdev(0);
5707         }
5708
5709         if (!dev)
5710                 return NULL;
5711
5712         dev->ml_priv = card;
5713         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5714         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5715          /* initialized when device first goes online: */
5716         dev->max_mtu = 0;
5717         dev->mtu = 0;
5718         SET_NETDEV_DEV(dev, &card->gdev->dev);
5719         netif_carrier_off(dev);
5720
5721         if (!IS_OSN(card)) {
5722                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5723                 dev->hw_features |= NETIF_F_SG;
5724                 dev->vlan_features |= NETIF_F_SG;
5725                 if (IS_IQD(card))
5726                         dev->features |= NETIF_F_SG;
5727         }
5728
5729         return dev;
5730 }
5731
5732 struct net_device *qeth_clone_netdev(struct net_device *orig)
5733 {
5734         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5735
5736         if (!clone)
5737                 return NULL;
5738
5739         clone->dev_port = orig->dev_port;
5740         return clone;
5741 }
5742
5743 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5744 {
5745         struct qeth_card *card;
5746         struct device *dev;
5747         int rc;
5748         enum qeth_discipline_id enforced_disc;
5749         unsigned long flags;
5750         char dbf_name[DBF_NAME_LEN];
5751
5752         QETH_DBF_TEXT(SETUP, 2, "probedev");
5753
5754         dev = &gdev->dev;
5755         if (!get_device(dev))
5756                 return -ENODEV;
5757
5758         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5759
5760         card = qeth_alloc_card(gdev);
5761         if (!card) {
5762                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5763                 rc = -ENOMEM;
5764                 goto err_dev;
5765         }
5766
5767         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5768                 dev_name(&gdev->dev));
5769         card->debug = qeth_get_dbf_entry(dbf_name);
5770         if (!card->debug) {
5771                 rc = qeth_add_dbf_entry(card, dbf_name);
5772                 if (rc)
5773                         goto err_card;
5774         }
5775
5776         dev_set_drvdata(&gdev->dev, card);
5777         qeth_setup_card(card);
5778         rc = qeth_update_from_chp_desc(card);
5779         if (rc)
5780                 goto err_chp_desc;
5781
5782         card->dev = qeth_alloc_netdev(card);
5783         if (!card->dev) {
5784                 rc = -ENOMEM;
5785                 goto err_card;
5786         }
5787
5788         qeth_determine_capabilities(card);
5789         enforced_disc = qeth_enforce_discipline(card);
5790         switch (enforced_disc) {
5791         case QETH_DISCIPLINE_UNDETERMINED:
5792                 gdev->dev.type = &qeth_generic_devtype;
5793                 break;
5794         default:
5795                 card->info.layer_enforced = true;
5796                 rc = qeth_core_load_discipline(card, enforced_disc);
5797                 if (rc)
5798                         goto err_load;
5799
5800                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5801                                         ? card->discipline->devtype
5802                                         : &qeth_osn_devtype;
5803                 rc = card->discipline->setup(card->gdev);
5804                 if (rc)
5805                         goto err_disc;
5806                 break;
5807         }
5808
5809         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5810         list_add_tail(&card->list, &qeth_core_card_list.list);
5811         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5812         return 0;
5813
5814 err_disc:
5815         qeth_core_free_discipline(card);
5816 err_load:
5817         free_netdev(card->dev);
5818 err_chp_desc:
5819 err_card:
5820         qeth_core_free_card(card);
5821 err_dev:
5822         put_device(dev);
5823         return rc;
5824 }
5825
5826 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5827 {
5828         unsigned long flags;
5829         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5830
5831         QETH_DBF_TEXT(SETUP, 2, "removedv");
5832
5833         if (card->discipline) {
5834                 card->discipline->remove(gdev);
5835                 qeth_core_free_discipline(card);
5836         }
5837
5838         write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
5839         list_del(&card->list);
5840         write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
5841         free_netdev(card->dev);
5842         qeth_core_free_card(card);
5843         dev_set_drvdata(&gdev->dev, NULL);
5844         put_device(&gdev->dev);
5845 }
5846
5847 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5848 {
5849         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5850         int rc = 0;
5851         enum qeth_discipline_id def_discipline;
5852
5853         if (!card->discipline) {
5854                 if (card->info.type == QETH_CARD_TYPE_IQD)
5855                         def_discipline = QETH_DISCIPLINE_LAYER3;
5856                 else
5857                         def_discipline = QETH_DISCIPLINE_LAYER2;
5858                 rc = qeth_core_load_discipline(card, def_discipline);
5859                 if (rc)
5860                         goto err;
5861                 rc = card->discipline->setup(card->gdev);
5862                 if (rc) {
5863                         qeth_core_free_discipline(card);
5864                         goto err;
5865                 }
5866         }
5867         rc = card->discipline->set_online(gdev);
5868 err:
5869         return rc;
5870 }
5871
5872 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5873 {
5874         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5875         return card->discipline->set_offline(gdev);
5876 }
5877
5878 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5879 {
5880         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5881         qeth_set_allowed_threads(card, 0, 1);
5882         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5883                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5884         qeth_qdio_clear_card(card, 0);
5885         qeth_clear_qdio_buffers(card);
5886         qdio_free(CARD_DDEV(card));
5887 }
5888
5889 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5890 {
5891         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5892         if (card->discipline && card->discipline->freeze)
5893                 return card->discipline->freeze(gdev);
5894         return 0;
5895 }
5896
5897 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5898 {
5899         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5900         if (card->discipline && card->discipline->thaw)
5901                 return card->discipline->thaw(gdev);
5902         return 0;
5903 }
5904
5905 static int qeth_core_restore(struct ccwgroup_device *gdev)
5906 {
5907         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5908         if (card->discipline && card->discipline->restore)
5909                 return card->discipline->restore(gdev);
5910         return 0;
5911 }
5912
5913 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5914                            size_t count)
5915 {
5916         int err;
5917
5918         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5919                                   buf);
5920
5921         return err ? err : count;
5922 }
5923 static DRIVER_ATTR_WO(group);
5924
5925 static struct attribute *qeth_drv_attrs[] = {
5926         &driver_attr_group.attr,
5927         NULL,
5928 };
5929 static struct attribute_group qeth_drv_attr_group = {
5930         .attrs = qeth_drv_attrs,
5931 };
5932 static const struct attribute_group *qeth_drv_attr_groups[] = {
5933         &qeth_drv_attr_group,
5934         NULL,
5935 };
5936
5937 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5938         .driver = {
5939                 .groups = qeth_drv_attr_groups,
5940                 .owner = THIS_MODULE,
5941                 .name = "qeth",
5942         },
5943         .ccw_driver = &qeth_ccw_driver,
5944         .setup = qeth_core_probe_device,
5945         .remove = qeth_core_remove_device,
5946         .set_online = qeth_core_set_online,
5947         .set_offline = qeth_core_set_offline,
5948         .shutdown = qeth_core_shutdown,
5949         .prepare = NULL,
5950         .complete = NULL,
5951         .freeze = qeth_core_freeze,
5952         .thaw = qeth_core_thaw,
5953         .restore = qeth_core_restore,
5954 };
5955
5956 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5957 {
5958         struct qeth_card *card = dev->ml_priv;
5959         struct mii_ioctl_data *mii_data;
5960         int rc = 0;
5961
5962         if (!card)
5963                 return -ENODEV;
5964
5965         if (!qeth_card_hw_is_reachable(card))
5966                 return -ENODEV;
5967
5968         if (card->info.type == QETH_CARD_TYPE_OSN)
5969                 return -EPERM;
5970
5971         switch (cmd) {
5972         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5973                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5974                 break;
5975         case SIOC_QETH_GET_CARD_TYPE:
5976                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5977                      card->info.type == QETH_CARD_TYPE_OSM ||
5978                      card->info.type == QETH_CARD_TYPE_OSX) &&
5979                     !card->info.guestlan)
5980                         return 1;
5981                 else
5982                         return 0;
5983         case SIOCGMIIPHY:
5984                 mii_data = if_mii(rq);
5985                 mii_data->phy_id = 0;
5986                 break;
5987         case SIOCGMIIREG:
5988                 mii_data = if_mii(rq);
5989                 if (mii_data->phy_id != 0)
5990                         rc = -EINVAL;
5991                 else
5992                         mii_data->val_out = qeth_mdio_read(dev,
5993                                 mii_data->phy_id, mii_data->reg_num);
5994                 break;
5995         case SIOC_QETH_QUERY_OAT:
5996                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5997                 break;
5998         default:
5999                 if (card->discipline->do_ioctl)
6000                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6001                 else
6002                         rc = -EOPNOTSUPP;
6003         }
6004         if (rc)
6005                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6006         return rc;
6007 }
6008 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6009
6010 static struct {
6011         const char str[ETH_GSTRING_LEN];
6012 } qeth_ethtool_stats_keys[] = {
6013 /*  0 */{"rx skbs"},
6014         {"rx buffers"},
6015         {"tx skbs"},
6016         {"tx buffers"},
6017         {"tx skbs no packing"},
6018         {"tx buffers no packing"},
6019         {"tx skbs packing"},
6020         {"tx buffers packing"},
6021         {"tx sg skbs"},
6022         {"tx buffer elements"},
6023 /* 10 */{"rx sg skbs"},
6024         {"rx sg frags"},
6025         {"rx sg page allocs"},
6026         {"tx large kbytes"},
6027         {"tx large count"},
6028         {"tx pk state ch n->p"},
6029         {"tx pk state ch p->n"},
6030         {"tx pk watermark low"},
6031         {"tx pk watermark high"},
6032         {"queue 0 buffer usage"},
6033 /* 20 */{"queue 1 buffer usage"},
6034         {"queue 2 buffer usage"},
6035         {"queue 3 buffer usage"},
6036         {"rx poll time"},
6037         {"rx poll count"},
6038         {"rx do_QDIO time"},
6039         {"rx do_QDIO count"},
6040         {"tx handler time"},
6041         {"tx handler count"},
6042         {"tx time"},
6043 /* 30 */{"tx count"},
6044         {"tx do_QDIO time"},
6045         {"tx do_QDIO count"},
6046         {"tx csum"},
6047         {"tx lin"},
6048         {"tx linfail"},
6049         {"cq handler count"},
6050         {"cq handler time"},
6051         {"rx csum"}
6052 };
6053
6054 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6055 {
6056         switch (stringset) {
6057         case ETH_SS_STATS:
6058                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6059         default:
6060                 return -EINVAL;
6061         }
6062 }
6063 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6064
6065 void qeth_core_get_ethtool_stats(struct net_device *dev,
6066                 struct ethtool_stats *stats, u64 *data)
6067 {
6068         struct qeth_card *card = dev->ml_priv;
6069         data[0] = card->stats.rx_packets -
6070                                 card->perf_stats.initial_rx_packets;
6071         data[1] = card->perf_stats.bufs_rec;
6072         data[2] = card->stats.tx_packets -
6073                                 card->perf_stats.initial_tx_packets;
6074         data[3] = card->perf_stats.bufs_sent;
6075         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6076                         - card->perf_stats.skbs_sent_pack;
6077         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6078         data[6] = card->perf_stats.skbs_sent_pack;
6079         data[7] = card->perf_stats.bufs_sent_pack;
6080         data[8] = card->perf_stats.sg_skbs_sent;
6081         data[9] = card->perf_stats.buf_elements_sent;
6082         data[10] = card->perf_stats.sg_skbs_rx;
6083         data[11] = card->perf_stats.sg_frags_rx;
6084         data[12] = card->perf_stats.sg_alloc_page_rx;
6085         data[13] = (card->perf_stats.large_send_bytes >> 10);
6086         data[14] = card->perf_stats.large_send_cnt;
6087         data[15] = card->perf_stats.sc_dp_p;
6088         data[16] = card->perf_stats.sc_p_dp;
6089         data[17] = QETH_LOW_WATERMARK_PACK;
6090         data[18] = QETH_HIGH_WATERMARK_PACK;
6091         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6092         data[20] = (card->qdio.no_out_queues > 1) ?
6093                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6094         data[21] = (card->qdio.no_out_queues > 2) ?
6095                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6096         data[22] = (card->qdio.no_out_queues > 3) ?
6097                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6098         data[23] = card->perf_stats.inbound_time;
6099         data[24] = card->perf_stats.inbound_cnt;
6100         data[25] = card->perf_stats.inbound_do_qdio_time;
6101         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6102         data[27] = card->perf_stats.outbound_handler_time;
6103         data[28] = card->perf_stats.outbound_handler_cnt;
6104         data[29] = card->perf_stats.outbound_time;
6105         data[30] = card->perf_stats.outbound_cnt;
6106         data[31] = card->perf_stats.outbound_do_qdio_time;
6107         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6108         data[33] = card->perf_stats.tx_csum;
6109         data[34] = card->perf_stats.tx_lin;
6110         data[35] = card->perf_stats.tx_linfail;
6111         data[36] = card->perf_stats.cq_cnt;
6112         data[37] = card->perf_stats.cq_time;
6113         data[38] = card->perf_stats.rx_csum;
6114 }
6115 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6116
6117 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6118 {
6119         switch (stringset) {
6120         case ETH_SS_STATS:
6121                 memcpy(data, &qeth_ethtool_stats_keys,
6122                         sizeof(qeth_ethtool_stats_keys));
6123                 break;
6124         default:
6125                 WARN_ON(1);
6126                 break;
6127         }
6128 }
6129 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6130
6131 void qeth_core_get_drvinfo(struct net_device *dev,
6132                 struct ethtool_drvinfo *info)
6133 {
6134         struct qeth_card *card = dev->ml_priv;
6135
6136         strlcpy(info->driver, card->options.layer2 ? "qeth_l2" : "qeth_l3",
6137                 sizeof(info->driver));
6138         strlcpy(info->version, "1.0", sizeof(info->version));
6139         strlcpy(info->fw_version, card->info.mcl_level,
6140                 sizeof(info->fw_version));
6141         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6142                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6143 }
6144 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6145
6146 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6147 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6148 /* Always advertise and support all speeds up to specified, and only one     */
6149 /* specified port type.                                                      */
6150 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6151                                 int maxspeed, int porttype)
6152 {
6153         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6154         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6155         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6156
6157         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6158         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6159
6160         switch (porttype) {
6161         case PORT_TP:
6162                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6163                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6164                 break;
6165         case PORT_FIBRE:
6166                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6167                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6168                 break;
6169         default:
6170                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6171                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6172                 WARN_ON_ONCE(1);
6173         }
6174
6175         /* fallthrough from high to low, to select all legal speeds: */
6176         switch (maxspeed) {
6177         case SPEED_10000:
6178                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6179                                                      10000baseT_Full);
6180                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6181                                                      10000baseT_Full);
6182         case SPEED_1000:
6183                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6184                                                      1000baseT_Full);
6185                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6186                                                      1000baseT_Full);
6187                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6188                                                      1000baseT_Half);
6189                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6190                                                      1000baseT_Half);
6191         case SPEED_100:
6192                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6193                                                      100baseT_Full);
6194                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6195                                                      100baseT_Full);
6196                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6197                                                      100baseT_Half);
6198                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6199                                                      100baseT_Half);
6200         case SPEED_10:
6201                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6202                                                      10baseT_Full);
6203                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6204                                                      10baseT_Full);
6205                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6206                                                      10baseT_Half);
6207                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6208                                                      10baseT_Half);
6209                 /* end fallthrough */
6210                 break;
6211         default:
6212                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6213                                                      10baseT_Full);
6214                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6215                                                      10baseT_Full);
6216                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6217                                                      10baseT_Half);
6218                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6219                                                      10baseT_Half);
6220                 WARN_ON_ONCE(1);
6221         }
6222 }
6223
6224 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6225                 struct ethtool_link_ksettings *cmd)
6226 {
6227         struct qeth_card *card = netdev->ml_priv;
6228         enum qeth_link_types link_type;
6229         struct carrier_info carrier_info;
6230         int rc;
6231
6232         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6233                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6234         else
6235                 link_type = card->info.link_type;
6236
6237         cmd->base.duplex = DUPLEX_FULL;
6238         cmd->base.autoneg = AUTONEG_ENABLE;
6239         cmd->base.phy_address = 0;
6240         cmd->base.mdio_support = 0;
6241         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6242         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6243
6244         switch (link_type) {
6245         case QETH_LINK_TYPE_FAST_ETH:
6246         case QETH_LINK_TYPE_LANE_ETH100:
6247                 cmd->base.speed = SPEED_100;
6248                 cmd->base.port = PORT_TP;
6249                 break;
6250         case QETH_LINK_TYPE_GBIT_ETH:
6251         case QETH_LINK_TYPE_LANE_ETH1000:
6252                 cmd->base.speed = SPEED_1000;
6253                 cmd->base.port = PORT_FIBRE;
6254                 break;
6255         case QETH_LINK_TYPE_10GBIT_ETH:
6256                 cmd->base.speed = SPEED_10000;
6257                 cmd->base.port = PORT_FIBRE;
6258                 break;
6259         default:
6260                 cmd->base.speed = SPEED_10;
6261                 cmd->base.port = PORT_TP;
6262         }
6263         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6264
6265         /* Check if we can obtain more accurate information.     */
6266         /* If QUERY_CARD_INFO command is not supported or fails, */
6267         /* just return the heuristics that was filled above.     */
6268         if (!qeth_card_hw_is_reachable(card))
6269                 return -ENODEV;
6270         rc = qeth_query_card_info(card, &carrier_info);
6271         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6272                 return 0;
6273         if (rc) /* report error from the hardware operation */
6274                 return rc;
6275         /* on success, fill in the information got from the hardware */
6276
6277         netdev_dbg(netdev,
6278         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6279                         carrier_info.card_type,
6280                         carrier_info.port_mode,
6281                         carrier_info.port_speed);
6282
6283         /* Update attributes for which we've obtained more authoritative */
6284         /* information, leave the rest the way they where filled above.  */
6285         switch (carrier_info.card_type) {
6286         case CARD_INFO_TYPE_1G_COPPER_A:
6287         case CARD_INFO_TYPE_1G_COPPER_B:
6288                 cmd->base.port = PORT_TP;
6289                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6290                 break;
6291         case CARD_INFO_TYPE_1G_FIBRE_A:
6292         case CARD_INFO_TYPE_1G_FIBRE_B:
6293                 cmd->base.port = PORT_FIBRE;
6294                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6295                 break;
6296         case CARD_INFO_TYPE_10G_FIBRE_A:
6297         case CARD_INFO_TYPE_10G_FIBRE_B:
6298                 cmd->base.port = PORT_FIBRE;
6299                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6300                 break;
6301         }
6302
6303         switch (carrier_info.port_mode) {
6304         case CARD_INFO_PORTM_FULLDUPLEX:
6305                 cmd->base.duplex = DUPLEX_FULL;
6306                 break;
6307         case CARD_INFO_PORTM_HALFDUPLEX:
6308                 cmd->base.duplex = DUPLEX_HALF;
6309                 break;
6310         }
6311
6312         switch (carrier_info.port_speed) {
6313         case CARD_INFO_PORTS_10M:
6314                 cmd->base.speed = SPEED_10;
6315                 break;
6316         case CARD_INFO_PORTS_100M:
6317                 cmd->base.speed = SPEED_100;
6318                 break;
6319         case CARD_INFO_PORTS_1G:
6320                 cmd->base.speed = SPEED_1000;
6321                 break;
6322         case CARD_INFO_PORTS_10G:
6323                 cmd->base.speed = SPEED_10000;
6324                 break;
6325         }
6326
6327         return 0;
6328 }
6329 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6330
6331 /* Callback to handle checksum offload command reply from OSA card.
6332  * Verify that required features have been enabled on the card.
6333  * Return error in hdr->return_code as this value is checked by caller.
6334  *
6335  * Always returns zero to indicate no further messages from the OSA card.
6336  */
6337 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6338                                         struct qeth_reply *reply,
6339                                         unsigned long data)
6340 {
6341         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6342         struct qeth_checksum_cmd *chksum_cb =
6343                                 (struct qeth_checksum_cmd *)reply->param;
6344
6345         QETH_CARD_TEXT(card, 4, "chkdoccb");
6346         if (qeth_setassparms_inspect_rc(cmd))
6347                 return 0;
6348
6349         memset(chksum_cb, 0, sizeof(*chksum_cb));
6350         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6351                 chksum_cb->supported =
6352                                 cmd->data.setassparms.data.chksum.supported;
6353                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6354         }
6355         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6356                 chksum_cb->supported =
6357                                 cmd->data.setassparms.data.chksum.supported;
6358                 chksum_cb->enabled =
6359                                 cmd->data.setassparms.data.chksum.enabled;
6360                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6361                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6362         }
6363         return 0;
6364 }
6365
6366 /* Send command to OSA card and check results. */
6367 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6368                                      enum qeth_ipa_funcs ipa_func,
6369                                      __u16 cmd_code, long data,
6370                                      struct qeth_checksum_cmd *chksum_cb,
6371                                      enum qeth_prot_versions prot)
6372 {
6373         struct qeth_cmd_buffer *iob;
6374         int rc = -ENOMEM;
6375
6376         QETH_CARD_TEXT(card, 4, "chkdocmd");
6377         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6378                                        sizeof(__u32), prot);
6379         if (iob)
6380                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6381                                            qeth_ipa_checksum_run_cmd_cb,
6382                                            chksum_cb);
6383         return rc;
6384 }
6385
6386 static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
6387                                  enum qeth_prot_versions prot)
6388 {
6389         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6390         struct qeth_checksum_cmd chksum_cb;
6391         int rc;
6392
6393         if (prot == QETH_PROT_IPV4)
6394                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6395         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6396                                        &chksum_cb, prot);
6397         if (!rc) {
6398                 if ((required_features & chksum_cb.supported) !=
6399                     required_features)
6400                         rc = -EIO;
6401                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6402                          cstype == IPA_INBOUND_CHECKSUM)
6403                         dev_warn(&card->gdev->dev,
6404                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6405                                  QETH_CARD_IFNAME(card));
6406         }
6407         if (rc) {
6408                 qeth_send_simple_setassparms_prot(card, cstype,
6409                                                   IPA_CMD_ASS_STOP, 0, prot);
6410                 dev_warn(&card->gdev->dev,
6411                          "Starting HW IPv%d checksumming for %s failed, using SW checksumming\n",
6412                          prot, QETH_CARD_IFNAME(card));
6413                 return rc;
6414         }
6415         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6416                                        chksum_cb.supported, &chksum_cb,
6417                                        prot);
6418         if (!rc) {
6419                 if ((required_features & chksum_cb.enabled) !=
6420                     required_features)
6421                         rc = -EIO;
6422         }
6423         if (rc) {
6424                 qeth_send_simple_setassparms_prot(card, cstype,
6425                                                   IPA_CMD_ASS_STOP, 0, prot);
6426                 dev_warn(&card->gdev->dev,
6427                          "Enabling HW IPv%d checksumming for %s failed, using SW checksumming\n",
6428                          prot, QETH_CARD_IFNAME(card));
6429                 return rc;
6430         }
6431
6432         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6433                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6434         return 0;
6435 }
6436
6437 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6438                              enum qeth_prot_versions prot)
6439 {
6440         int rc = (on) ? qeth_send_checksum_on(card, cstype, prot)
6441                       : qeth_send_simple_setassparms_prot(card, cstype,
6442                                                           IPA_CMD_ASS_STOP, 0,
6443                                                           prot);
6444         return rc ? -EIO : 0;
6445 }
6446
6447 static int qeth_set_ipa_tso(struct qeth_card *card, int on)
6448 {
6449         int rc;
6450
6451         QETH_CARD_TEXT(card, 3, "sttso");
6452
6453         if (on) {
6454                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6455                                                   IPA_CMD_ASS_START, 0);
6456                 if (rc) {
6457                         dev_warn(&card->gdev->dev,
6458                                  "Starting outbound TCP segmentation offload for %s failed\n",
6459                                  QETH_CARD_IFNAME(card));
6460                         return -EIO;
6461                 }
6462                 dev_info(&card->gdev->dev, "Outbound TSO enabled\n");
6463         } else {
6464                 rc = qeth_send_simple_setassparms(card, IPA_OUTBOUND_TSO,
6465                                                   IPA_CMD_ASS_STOP, 0);
6466         }
6467         return rc;
6468 }
6469
6470 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6471 {
6472         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6473         int rc_ipv6;
6474
6475         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6476                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6477                                             QETH_PROT_IPV4);
6478         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6479                 /* no/one Offload Assist available, so the rc is trivial */
6480                 return rc_ipv4;
6481
6482         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6483                                     QETH_PROT_IPV6);
6484
6485         if (on)
6486                 /* enable: success if any Assist is active */
6487                 return (rc_ipv6) ? rc_ipv4 : 0;
6488
6489         /* disable: failure if any Assist is still active */
6490         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6491 }
6492
6493 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
6494                           NETIF_F_IPV6_CSUM)
6495 /**
6496  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6497  * @dev:        a net_device
6498  */
6499 void qeth_enable_hw_features(struct net_device *dev)
6500 {
6501         struct qeth_card *card = dev->ml_priv;
6502         netdev_features_t features;
6503
6504         rtnl_lock();
6505         features = dev->features;
6506         /* force-off any feature that needs an IPA sequence.
6507          * netdev_update_features() will restart them.
6508          */
6509         dev->features &= ~QETH_HW_FEATURES;
6510         netdev_update_features(dev);
6511         if (features != dev->features)
6512                 dev_warn(&card->gdev->dev,
6513                          "Device recovery failed to restore all offload features\n");
6514         rtnl_unlock();
6515 }
6516 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6517
6518 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6519 {
6520         struct qeth_card *card = dev->ml_priv;
6521         netdev_features_t changed = dev->features ^ features;
6522         int rc = 0;
6523
6524         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6525         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6526
6527         if ((changed & NETIF_F_IP_CSUM)) {
6528                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6529                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6530                 if (rc)
6531                         changed ^= NETIF_F_IP_CSUM;
6532         }
6533         if (changed & NETIF_F_IPV6_CSUM) {
6534                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6535                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6536                 if (rc)
6537                         changed ^= NETIF_F_IPV6_CSUM;
6538         }
6539         if (changed & NETIF_F_RXCSUM) {
6540                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6541                 if (rc)
6542                         changed ^= NETIF_F_RXCSUM;
6543         }
6544         if ((changed & NETIF_F_TSO)) {
6545                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO ? 1 : 0);
6546                 if (rc)
6547                         changed ^= NETIF_F_TSO;
6548         }
6549
6550         /* everything changed successfully? */
6551         if ((dev->features ^ features) == changed)
6552                 return 0;
6553         /* something went wrong. save changed features and return error */
6554         dev->features ^= changed;
6555         return -EIO;
6556 }
6557 EXPORT_SYMBOL_GPL(qeth_set_features);
6558
6559 netdev_features_t qeth_fix_features(struct net_device *dev,
6560                                     netdev_features_t features)
6561 {
6562         struct qeth_card *card = dev->ml_priv;
6563
6564         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6565         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6566                 features &= ~NETIF_F_IP_CSUM;
6567         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6568                 features &= ~NETIF_F_IPV6_CSUM;
6569         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6570             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6571                 features &= ~NETIF_F_RXCSUM;
6572         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6573                 features &= ~NETIF_F_TSO;
6574         /* if the card isn't up, remove features that require hw changes */
6575         if (card->state == CARD_STATE_DOWN ||
6576             card->state == CARD_STATE_RECOVER)
6577                 features &= ~QETH_HW_FEATURES;
6578         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6579         return features;
6580 }
6581 EXPORT_SYMBOL_GPL(qeth_fix_features);
6582
6583 netdev_features_t qeth_features_check(struct sk_buff *skb,
6584                                       struct net_device *dev,
6585                                       netdev_features_t features)
6586 {
6587         /* GSO segmentation builds skbs with
6588          *      a (small) linear part for the headers, and
6589          *      page frags for the data.
6590          * Compared to a linear skb, the header-only part consumes an
6591          * additional buffer element. This reduces buffer utilization, and
6592          * hurts throughput. So compress small segments into one element.
6593          */
6594         if (netif_needs_gso(skb, features)) {
6595                 /* match skb_segment(): */
6596                 unsigned int doffset = skb->data - skb_mac_header(skb);
6597                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6598                 unsigned int hroom = skb_headroom(skb);
6599
6600                 /* linearize only if resulting skb allocations are order-0: */
6601                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6602                         features &= ~NETIF_F_SG;
6603         }
6604
6605         return vlan_features_check(skb, features);
6606 }
6607 EXPORT_SYMBOL_GPL(qeth_features_check);
6608
6609 static int __init qeth_core_init(void)
6610 {
6611         int rc;
6612
6613         pr_info("loading core functions\n");
6614         INIT_LIST_HEAD(&qeth_core_card_list.list);
6615         INIT_LIST_HEAD(&qeth_dbf_list);
6616         rwlock_init(&qeth_core_card_list.rwlock);
6617         mutex_init(&qeth_mod_mutex);
6618
6619         qeth_wq = create_singlethread_workqueue("qeth_wq");
6620         if (!qeth_wq) {
6621                 rc = -ENOMEM;
6622                 goto out_err;
6623         }
6624
6625         rc = qeth_register_dbf_views();
6626         if (rc)
6627                 goto dbf_err;
6628         qeth_core_root_dev = root_device_register("qeth");
6629         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6630         if (rc)
6631                 goto register_err;
6632         qeth_core_header_cache = kmem_cache_create("qeth_hdr",
6633                         sizeof(struct qeth_hdr) + ETH_HLEN, 64, 0, NULL);
6634         if (!qeth_core_header_cache) {
6635                 rc = -ENOMEM;
6636                 goto slab_err;
6637         }
6638         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6639                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6640         if (!qeth_qdio_outbuf_cache) {
6641                 rc = -ENOMEM;
6642                 goto cqslab_err;
6643         }
6644         rc = ccw_driver_register(&qeth_ccw_driver);
6645         if (rc)
6646                 goto ccw_err;
6647         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6648         if (rc)
6649                 goto ccwgroup_err;
6650
6651         return 0;
6652
6653 ccwgroup_err:
6654         ccw_driver_unregister(&qeth_ccw_driver);
6655 ccw_err:
6656         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6657 cqslab_err:
6658         kmem_cache_destroy(qeth_core_header_cache);
6659 slab_err:
6660         root_device_unregister(qeth_core_root_dev);
6661 register_err:
6662         qeth_unregister_dbf_views();
6663 dbf_err:
6664         destroy_workqueue(qeth_wq);
6665 out_err:
6666         pr_err("Initializing the qeth device driver failed\n");
6667         return rc;
6668 }
6669
6670 static void __exit qeth_core_exit(void)
6671 {
6672         qeth_clear_dbf_list();
6673         destroy_workqueue(qeth_wq);
6674         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6675         ccw_driver_unregister(&qeth_ccw_driver);
6676         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6677         kmem_cache_destroy(qeth_core_header_cache);
6678         root_device_unregister(qeth_core_root_dev);
6679         qeth_unregister_dbf_views();
6680         pr_info("core functions removed\n");
6681 }
6682
6683 module_init(qeth_core_init);
6684 module_exit(qeth_core_exit);
6685 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6686 MODULE_DESCRIPTION("qeth core functions");
6687 MODULE_LICENSE("GPL");