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/log2.h>
  20 #include <linux/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/mm.h>
  24 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_vlan.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/netdev_features.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/vmalloc.h>
  31
  32 #include <net/iucv/af_iucv.h>
  33 #include <net/dsfield.h>
  34
  35 #include <asm/ebcdic.h>
  36 #include <asm/chpid.h>
  37 #include <asm/io.h>
  38 #include <asm/sysinfo.h>
  39 #include <asm/diag.h>
  40 #include <asm/cio.h>
  41 #include <asm/ccwdev.h>
  42 #include <asm/cpcmd.h>
  43
  44 #include "qeth_core.h"
  45
  46 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  47         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  48         /*                   N  P  A    M  L  V                      H  */
  49         [QETH_DBF_SETUP] = {"qeth_setup",
  50                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  51         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  52                             &debug_sprintf_view, NULL},
  53         [QETH_DBF_CTRL]  = {"qeth_control",
  54                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  55 };
  56 EXPORT_SYMBOL_GPL(qeth_dbf);
  57
  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
  65 static void qeth_issue_next_read_cb(struct qeth_card *card,
  66                                     struct qeth_cmd_buffer *iob,
  67                                     unsigned int data_length);
  68 static void qeth_free_buffer_pool(struct qeth_card *);
  69 static int qeth_qdio_establish(struct qeth_card *);
  70 static void qeth_free_qdio_queues(struct qeth_card *card);
  71 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  72                 struct qeth_qdio_out_buffer *buf,
  73                 enum iucv_tx_notify notification);
  74 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  75                                  int budget);
  76 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  77
  78 static void qeth_close_dev_handler(struct work_struct *work)
  79 {
  80         struct qeth_card *card;
  81
  82         card = container_of(work, struct qeth_card, close_dev_work);
  83         QETH_CARD_TEXT(card, 2, "cldevhdl");
  84         ccwgroup_set_offline(card->gdev);
  85 }
  86
  87 static const char *qeth_get_cardname(struct qeth_card *card)
  88 {
  89         if (IS_VM_NIC(card)) {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " Virtual NIC QDIO";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " Virtual NIC Hiper";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " Virtual NIC QDIO - OSM";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " Virtual NIC QDIO - OSX";
  99                 default:
 100                         return " unknown";
 101                 }
 102         } else {
 103                 switch (card->info.type) {
 104                 case QETH_CARD_TYPE_OSD:
 105                         return " OSD Express";
 106                 case QETH_CARD_TYPE_IQD:
 107                         return " HiperSockets";
 108                 case QETH_CARD_TYPE_OSN:
 109                         return " OSN QDIO";
 110                 case QETH_CARD_TYPE_OSM:
 111                         return " OSM QDIO";
 112                 case QETH_CARD_TYPE_OSX:
 113                         return " OSX QDIO";
 114                 default:
 115                         return " unknown";
 116                 }
 117         }
 118         return " n/a";
 119 }
 120
 121 /* max length to be returned: 14 */
 122 const char *qeth_get_cardname_short(struct qeth_card *card)
 123 {
 124         if (IS_VM_NIC(card)) {
 125                 switch (card->info.type) {
 126                 case QETH_CARD_TYPE_OSD:
 127                         return "Virt.NIC QDIO";
 128                 case QETH_CARD_TYPE_IQD:
 129                         return "Virt.NIC Hiper";
 130                 case QETH_CARD_TYPE_OSM:
 131                         return "Virt.NIC OSM";
 132                 case QETH_CARD_TYPE_OSX:
 133                         return "Virt.NIC OSX";
 134                 default:
 135                         return "unknown";
 136                 }
 137         } else {
 138                 switch (card->info.type) {
 139                 case QETH_CARD_TYPE_OSD:
 140                         switch (card->info.link_type) {
 141                         case QETH_LINK_TYPE_FAST_ETH:
 142                                 return "OSD_100";
 143                         case QETH_LINK_TYPE_HSTR:
 144                                 return "HSTR";
 145                         case QETH_LINK_TYPE_GBIT_ETH:
 146                                 return "OSD_1000";
 147                         case QETH_LINK_TYPE_10GBIT_ETH:
 148                                 return "OSD_10GIG";
 149                         case QETH_LINK_TYPE_25GBIT_ETH:
 150                                 return "OSD_25GIG";
 151                         case QETH_LINK_TYPE_LANE_ETH100:
 152                                 return "OSD_FE_LANE";
 153                         case QETH_LINK_TYPE_LANE_TR:
 154                                 return "OSD_TR_LANE";
 155                         case QETH_LINK_TYPE_LANE_ETH1000:
 156                                 return "OSD_GbE_LANE";
 157                         case QETH_LINK_TYPE_LANE:
 158                                 return "OSD_ATM_LANE";
 159                         default:
 160                                 return "OSD_Express";
 161                         }
 162                 case QETH_CARD_TYPE_IQD:
 163                         return "HiperSockets";
 164                 case QETH_CARD_TYPE_OSN:
 165                         return "OSN";
 166                 case QETH_CARD_TYPE_OSM:
 167                         return "OSM_1000";
 168                 case QETH_CARD_TYPE_OSX:
 169                         return "OSX_10GIG";
 170                 default:
 171                         return "unknown";
 172                 }
 173         }
 174         return "n/a";
 175 }
 176
 177 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 178                          int clear_start_mask)
 179 {
 180         unsigned long flags;
 181
 182         spin_lock_irqsave(&card->thread_mask_lock, flags);
 183         card->thread_allowed_mask = threads;
 184         if (clear_start_mask)
 185                 card->thread_start_mask &= threads;
 186         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 187         wake_up(&card->wait_q);
 188 }
 189 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 190
 191 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 192 {
 193         unsigned long flags;
 194         int rc = 0;
 195
 196         spin_lock_irqsave(&card->thread_mask_lock, flags);
 197         rc = (card->thread_running_mask & threads);
 198         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 199         return rc;
 200 }
 201 EXPORT_SYMBOL_GPL(qeth_threads_running);
 202
 203 void qeth_clear_working_pool_list(struct qeth_card *card)
 204 {
 205         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 206
 207         QETH_CARD_TEXT(card, 5, "clwrklst");
 208         list_for_each_entry_safe(pool_entry, tmp,
 209                             &card->qdio.in_buf_pool.entry_list, list){
 210                         list_del(&pool_entry->list);
 211         }
 212 }
 213 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 214
 215 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 216 {
 217         struct qeth_buffer_pool_entry *pool_entry;
 218         void *ptr;
 219         int i, j;
 220
 221         QETH_CARD_TEXT(card, 5, "alocpool");
 222         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 223                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 224                 if (!pool_entry) {
 225                         qeth_free_buffer_pool(card);
 226                         return -ENOMEM;
 227                 }
 228                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 229                         ptr = (void *) __get_free_page(GFP_KERNEL);
 230                         if (!ptr) {
 231                                 while (j > 0)
 232                                         free_page((unsigned long)
 233                                                   pool_entry->elements[--j]);
 234                                 kfree(pool_entry);
 235                                 qeth_free_buffer_pool(card);
 236                                 return -ENOMEM;
 237                         }
 238                         pool_entry->elements[j] = ptr;
 239                 }
 240                 list_add(&pool_entry->init_list,
 241                          &card->qdio.init_pool.entry_list);
 242         }
 243         return 0;
 244 }
 245
 246 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 247 {
 248         QETH_CARD_TEXT(card, 2, "realcbp");
 249
 250         if (card->state != CARD_STATE_DOWN)
 251                 return -EPERM;
 252
 253         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 254         qeth_clear_working_pool_list(card);
 255         qeth_free_buffer_pool(card);
 256         card->qdio.in_buf_pool.buf_count = bufcnt;
 257         card->qdio.init_pool.buf_count = bufcnt;
 258         return qeth_alloc_buffer_pool(card);
 259 }
 260 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 261
 262 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 263 {
 264         if (!q)
 265                 return;
 266
 267         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 268         kfree(q);
 269 }
 270
 271 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 272 {
 273         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 274         int i;
 275
 276         if (!q)
 277                 return NULL;
 278
 279         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 280                 kfree(q);
 281                 return NULL;
 282         }
 283
 284         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 285                 q->bufs[i].buffer = q->qdio_bufs[i];
 286
 287         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 288         return q;
 289 }
 290
 291 static int qeth_cq_init(struct qeth_card *card)
 292 {
 293         int rc;
 294
 295         if (card->options.cq == QETH_CQ_ENABLED) {
 296                 QETH_CARD_TEXT(card, 2, "cqinit");
 297                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 298                                    QDIO_MAX_BUFFERS_PER_Q);
 299                 card->qdio.c_q->next_buf_to_init = 127;
 300                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 301                              card->qdio.no_in_queues - 1, 0,
 302                              127);
 303                 if (rc) {
 304                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 305                         goto out;
 306                 }
 307         }
 308         rc = 0;
 309 out:
 310         return rc;
 311 }
 312
 313 static int qeth_alloc_cq(struct qeth_card *card)
 314 {
 315         int rc;
 316
 317         if (card->options.cq == QETH_CQ_ENABLED) {
 318                 int i;
 319                 struct qdio_outbuf_state *outbuf_states;
 320
 321                 QETH_CARD_TEXT(card, 2, "cqon");
 322                 card->qdio.c_q = qeth_alloc_qdio_queue();
 323                 if (!card->qdio.c_q) {
 324                         rc = -1;
 325                         goto kmsg_out;
 326                 }
 327                 card->qdio.no_in_queues = 2;
 328                 card->qdio.out_bufstates =
 329                         kcalloc(card->qdio.no_out_queues *
 330                                         QDIO_MAX_BUFFERS_PER_Q,
 331                                 sizeof(struct qdio_outbuf_state),
 332                                 GFP_KERNEL);
 333                 outbuf_states = card->qdio.out_bufstates;
 334                 if (outbuf_states == NULL) {
 335                         rc = -1;
 336                         goto free_cq_out;
 337                 }
 338                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 339                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 340                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 341                 }
 342         } else {
 343                 QETH_CARD_TEXT(card, 2, "nocq");
 344                 card->qdio.c_q = NULL;
 345                 card->qdio.no_in_queues = 1;
 346         }
 347         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 348         rc = 0;
 349 out:
 350         return rc;
 351 free_cq_out:
 352         qeth_free_qdio_queue(card->qdio.c_q);
 353         card->qdio.c_q = NULL;
 354 kmsg_out:
 355         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 356         goto out;
 357 }
 358
 359 static void qeth_free_cq(struct qeth_card *card)
 360 {
 361         if (card->qdio.c_q) {
 362                 --card->qdio.no_in_queues;
 363                 qeth_free_qdio_queue(card->qdio.c_q);
 364                 card->qdio.c_q = NULL;
 365         }
 366         kfree(card->qdio.out_bufstates);
 367         card->qdio.out_bufstates = NULL;
 368 }
 369
 370 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 371                                                         int delayed)
 372 {
 373         enum iucv_tx_notify n;
 374
 375         switch (sbalf15) {
 376         case 0:
 377                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 378                 break;
 379         case 4:
 380         case 16:
 381         case 17:
 382         case 18:
 383                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 384                         TX_NOTIFY_UNREACHABLE;
 385                 break;
 386         default:
 387                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 388                         TX_NOTIFY_GENERALERROR;
 389                 break;
 390         }
 391
 392         return n;
 393 }
 394
 395 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 396                                          int forced_cleanup)
 397 {
 398         if (q->card->options.cq != QETH_CQ_ENABLED)
 399                 return;
 400
 401         if (q->bufs[bidx]->next_pending != NULL) {
 402                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 403                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 404
 405                 while (c) {
 406                         if (forced_cleanup ||
 407                             atomic_read(&c->state) ==
 408                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 409                                 struct qeth_qdio_out_buffer *f = c;
 410                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 411                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 412                                 /* release here to avoid interleaving between
 413                                    outbound tasklet and inbound tasklet
 414                                    regarding notifications and lifecycle */
 415                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 416
 417                                 c = f->next_pending;
 418                                 WARN_ON_ONCE(head->next_pending != f);
 419                                 head->next_pending = c;
 420                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 421                         } else {
 422                                 head = c;
 423                                 c = c->next_pending;
 424                         }
 425
 426                 }
 427         }
 428         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 429                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 430                 /* for recovery situations */
 431                 qeth_init_qdio_out_buf(q, bidx);
 432                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 433         }
 434 }
 435
 436
 437 static void qeth_qdio_handle_aob(struct qeth_card *card,
 438                                  unsigned long phys_aob_addr)
 439 {
 440         struct qaob *aob;
 441         struct qeth_qdio_out_buffer *buffer;
 442         enum iucv_tx_notify notification;
 443         unsigned int i;
 444
 445         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 446         QETH_CARD_TEXT(card, 5, "haob");
 447         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 448         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 449         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 450
 451         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 452                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 453                 notification = TX_NOTIFY_OK;
 454         } else {
 455                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 456                                                         QETH_QDIO_BUF_PENDING);
 457                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 458                 notification = TX_NOTIFY_DELAYED_OK;
 459         }
 460
 461         if (aob->aorc != 0)  {
 462                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 463                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 464         }
 465         qeth_notify_skbs(buffer->q, buffer, notification);
 466
 467         /* Free dangling allocations. The attached skbs are handled by
 468          * qeth_cleanup_handled_pending().
 469          */
 470         for (i = 0;
 471              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 472              i++) {
 473                 if (aob->sba[i] && buffer->is_header[i])
 474                         kmem_cache_free(qeth_core_header_cache,
 475                                         (void *) aob->sba[i]);
 476         }
 477         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 478
 479         qdio_release_aob(aob);
 480 }
 481
 482 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 483 {
 484         return card->options.cq == QETH_CQ_ENABLED &&
 485             card->qdio.c_q != NULL &&
 486             queue != 0 &&
 487             queue == card->qdio.no_in_queues - 1;
 488 }
 489
 490 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 491                            void *data)
 492 {
 493         ccw->cmd_code = cmd_code;
 494         ccw->flags = flags | CCW_FLAG_SLI;
 495         ccw->count = len;
 496         ccw->cda = (__u32) __pa(data);
 497 }
 498
 499 static int __qeth_issue_next_read(struct qeth_card *card)
 500 {
 501         struct qeth_cmd_buffer *iob = card->read_cmd;
 502         struct qeth_channel *channel = iob->channel;
 503         struct ccw1 *ccw = __ccw_from_cmd(iob);
 504         int rc;
 505
 506         QETH_CARD_TEXT(card, 5, "issnxrd");
 507         if (channel->state != CH_STATE_UP)
 508                 return -EIO;
 509
 510         memset(iob->data, 0, iob->length);
 511         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 512         iob->callback = qeth_issue_next_read_cb;
 513         /* keep the cmd alive after completion: */
 514         qeth_get_cmd(iob);
 515
 516         QETH_CARD_TEXT(card, 6, "noirqpnd");
 517         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 518         if (!rc) {
 519                 channel->active_cmd = iob;
 520         } else {
 521                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 522                                  rc, CARD_DEVID(card));
 523                 atomic_set(&channel->irq_pending, 0);
 524                 qeth_put_cmd(iob);
 525                 card->read_or_write_problem = 1;
 526                 qeth_schedule_recovery(card);
 527                 wake_up(&card->wait_q);
 528         }
 529         return rc;
 530 }
 531
 532 static int qeth_issue_next_read(struct qeth_card *card)
 533 {
 534         int ret;
 535
 536         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 537         ret = __qeth_issue_next_read(card);
 538         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 539
 540         return ret;
 541 }
 542
 543 static void qeth_enqueue_cmd(struct qeth_card *card,
 544                              struct qeth_cmd_buffer *iob)
 545 {
 546         spin_lock_irq(&card->lock);
 547         list_add_tail(&iob->list, &card->cmd_waiter_list);
 548         spin_unlock_irq(&card->lock);
 549 }
 550
 551 static void qeth_dequeue_cmd(struct qeth_card *card,
 552                              struct qeth_cmd_buffer *iob)
 553 {
 554         spin_lock_irq(&card->lock);
 555         list_del(&iob->list);
 556         spin_unlock_irq(&card->lock);
 557 }
 558
 559 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 560 {
 561         iob->rc = reason;
 562         complete(&iob->done);
 563 }
 564 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 565
 566 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 567                 struct qeth_card *card)
 568 {
 569         const char *ipa_name;
 570         int com = cmd->hdr.command;
 571         ipa_name = qeth_get_ipa_cmd_name(com);
 572
 573         if (rc)
 574                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 575                                  ipa_name, com, CARD_DEVID(card), rc,
 576                                  qeth_get_ipa_msg(rc));
 577         else
 578                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 579                                  ipa_name, com, CARD_DEVID(card));
 580 }
 581
 582 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 583                                                 struct qeth_ipa_cmd *cmd)
 584 {
 585         QETH_CARD_TEXT(card, 5, "chkipad");
 586
 587         if (IS_IPA_REPLY(cmd)) {
 588                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 589                     cmd->hdr.command != IPA_CMD_DELCCID &&
 590                     cmd->hdr.command != IPA_CMD_MODCCID &&
 591                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 592                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 593                 return cmd;
 594         }
 595
 596         /* handle unsolicited event: */
 597         switch (cmd->hdr.command) {
 598         case IPA_CMD_STOPLAN:
 599                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 600                         dev_err(&card->gdev->dev,
 601                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 602                                 QETH_CARD_IFNAME(card));
 603                         schedule_work(&card->close_dev_work);
 604                 } else {
 605                         dev_warn(&card->gdev->dev,
 606                                  "The link for interface %s on CHPID 0x%X failed\n",
 607                                  QETH_CARD_IFNAME(card), card->info.chpid);
 608                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 609                         netif_carrier_off(card->dev);
 610                 }
 611                 return NULL;
 612         case IPA_CMD_STARTLAN:
 613                 dev_info(&card->gdev->dev,
 614                          "The link for %s on CHPID 0x%X has been restored\n",
 615                          QETH_CARD_IFNAME(card), card->info.chpid);
 616                 if (card->info.hwtrap)
 617                         card->info.hwtrap = 2;
 618                 qeth_schedule_recovery(card);
 619                 return NULL;
 620         case IPA_CMD_SETBRIDGEPORT_IQD:
 621         case IPA_CMD_SETBRIDGEPORT_OSA:
 622         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 623                 if (card->discipline->control_event_handler(card, cmd))
 624                         return cmd;
 625                 return NULL;
 626         case IPA_CMD_MODCCID:
 627                 return cmd;
 628         case IPA_CMD_REGISTER_LOCAL_ADDR:
 629                 QETH_CARD_TEXT(card, 3, "irla");
 630                 return NULL;
 631         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 632                 QETH_CARD_TEXT(card, 3, "urla");
 633                 return NULL;
 634         default:
 635                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 636                 return cmd;
 637         }
 638 }
 639
 640 void qeth_clear_ipacmd_list(struct qeth_card *card)
 641 {
 642         struct qeth_cmd_buffer *iob;
 643         unsigned long flags;
 644
 645         QETH_CARD_TEXT(card, 4, "clipalst");
 646
 647         spin_lock_irqsave(&card->lock, flags);
 648         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 649                 qeth_notify_cmd(iob, -EIO);
 650         spin_unlock_irqrestore(&card->lock, flags);
 651 }
 652 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 653
 654 static int qeth_check_idx_response(struct qeth_card *card,
 655         unsigned char *buffer)
 656 {
 657         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 658         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 659                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 660                                  buffer[4]);
 661                 QETH_CARD_TEXT(card, 2, "ckidxres");
 662                 QETH_CARD_TEXT(card, 2, " idxterm");
 663                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 664                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 665                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 666                         dev_err(&card->gdev->dev,
 667                                 "The device does not support the configured transport mode\n");
 668                         return -EPROTONOSUPPORT;
 669                 }
 670                 return -EIO;
 671         }
 672         return 0;
 673 }
 674
 675 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 676 {
 677         if (refcount_dec_and_test(&iob->ref_count)) {
 678                 kfree(iob->data);
 679                 kfree(iob);
 680         }
 681 }
 682 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 683
 684 static void qeth_release_buffer_cb(struct qeth_card *card,
 685                                    struct qeth_cmd_buffer *iob,
 686                                    unsigned int data_length)
 687 {
 688         qeth_put_cmd(iob);
 689 }
 690
 691 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 692 {
 693         qeth_notify_cmd(iob, rc);
 694         qeth_put_cmd(iob);
 695 }
 696
 697 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 698                                        unsigned int length, unsigned int ccws,
 699                                        long timeout)
 700 {
 701         struct qeth_cmd_buffer *iob;
 702
 703         if (length > QETH_BUFSIZE)
 704                 return NULL;
 705
 706         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 707         if (!iob)
 708                 return NULL;
 709
 710         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 711                             GFP_KERNEL | GFP_DMA);
 712         if (!iob->data) {
 713                 kfree(iob);
 714                 return NULL;
 715         }
 716
 717         init_completion(&iob->done);
 718         spin_lock_init(&iob->lock);
 719         INIT_LIST_HEAD(&iob->list);
 720         refcount_set(&iob->ref_count, 1);
 721         iob->channel = channel;
 722         iob->timeout = timeout;
 723         iob->length = length;
 724         return iob;
 725 }
 726 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
 727
 728 static void qeth_issue_next_read_cb(struct qeth_card *card,
 729                                     struct qeth_cmd_buffer *iob,
 730                                     unsigned int data_length)
 731 {
 732         struct qeth_cmd_buffer *request = NULL;
 733         struct qeth_ipa_cmd *cmd = NULL;
 734         struct qeth_reply *reply = NULL;
 735         struct qeth_cmd_buffer *tmp;
 736         unsigned long flags;
 737         int rc = 0;
 738
 739         QETH_CARD_TEXT(card, 4, "sndctlcb");
 740         rc = qeth_check_idx_response(card, iob->data);
 741         switch (rc) {
 742         case 0:
 743                 break;
 744         case -EIO:
 745                 qeth_schedule_recovery(card);
 746                 /* fall through */
 747         default:
 748                 qeth_clear_ipacmd_list(card);
 749                 goto out;
 750         }
 751
 752         if (IS_IPA(iob->data)) {
 753                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 754                 cmd = qeth_check_ipa_data(card, cmd);
 755                 if (!cmd)
 756                         goto out;
 757                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 758                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 759                         card->osn_info.assist_cb(card->dev, cmd);
 760                         goto out;
 761                 }
 762         } else {
 763                 /* non-IPA commands should only flow during initialization */
 764                 if (card->state != CARD_STATE_DOWN)
 765                         goto out;
 766         }
 767
 768         /* match against pending cmd requests */
 769         spin_lock_irqsave(&card->lock, flags);
 770         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
 771                 if (!IS_IPA(tmp->data) ||
 772                     __ipa_cmd(tmp)->hdr.seqno == cmd->hdr.seqno) {
 773                         request = tmp;
 774                         /* take the object outside the lock */
 775                         qeth_get_cmd(request);
 776                         break;
 777                 }
 778         }
 779         spin_unlock_irqrestore(&card->lock, flags);
 780
 781         if (!request)
 782                 goto out;
 783
 784         reply = &request->reply;
 785         if (!reply->callback) {
 786                 rc = 0;
 787                 goto no_callback;
 788         }
 789
 790         spin_lock_irqsave(&request->lock, flags);
 791         if (request->rc)
 792                 /* Bail out when the requestor has already left: */
 793                 rc = request->rc;
 794         else
 795                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 796                                                         (unsigned long)iob);
 797         spin_unlock_irqrestore(&request->lock, flags);
 798
 799 no_callback:
 800         if (rc <= 0)
 801                 qeth_notify_cmd(request, rc);
 802         qeth_put_cmd(request);
 803 out:
 804         memcpy(&card->seqno.pdu_hdr_ack,
 805                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 806                 QETH_SEQ_NO_LENGTH);
 807         qeth_put_cmd(iob);
 808         __qeth_issue_next_read(card);
 809 }
 810
 811 static int qeth_set_thread_start_bit(struct qeth_card *card,
 812                 unsigned long thread)
 813 {
 814         unsigned long flags;
 815
 816         spin_lock_irqsave(&card->thread_mask_lock, flags);
 817         if (!(card->thread_allowed_mask & thread) ||
 818               (card->thread_start_mask & thread)) {
 819                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 820                 return -EPERM;
 821         }
 822         card->thread_start_mask |= thread;
 823         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 824         return 0;
 825 }
 826
 827 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 828 {
 829         unsigned long flags;
 830
 831         spin_lock_irqsave(&card->thread_mask_lock, flags);
 832         card->thread_start_mask &= ~thread;
 833         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 834         wake_up(&card->wait_q);
 835 }
 836 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 837
 838 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 839 {
 840         unsigned long flags;
 841
 842         spin_lock_irqsave(&card->thread_mask_lock, flags);
 843         card->thread_running_mask &= ~thread;
 844         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 845         wake_up_all(&card->wait_q);
 846 }
 847 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 848
 849 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 850 {
 851         unsigned long flags;
 852         int rc = 0;
 853
 854         spin_lock_irqsave(&card->thread_mask_lock, flags);
 855         if (card->thread_start_mask & thread) {
 856                 if ((card->thread_allowed_mask & thread) &&
 857                     !(card->thread_running_mask & thread)) {
 858                         rc = 1;
 859                         card->thread_start_mask &= ~thread;
 860                         card->thread_running_mask |= thread;
 861                 } else
 862                         rc = -EPERM;
 863         }
 864         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 865         return rc;
 866 }
 867
 868 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 869 {
 870         int rc = 0;
 871
 872         wait_event(card->wait_q,
 873                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 874         return rc;
 875 }
 876 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 877
 878 void qeth_schedule_recovery(struct qeth_card *card)
 879 {
 880         QETH_CARD_TEXT(card, 2, "startrec");
 881         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 882                 schedule_work(&card->kernel_thread_starter);
 883 }
 884 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 885
 886 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 887                             struct irb *irb)
 888 {
 889         int dstat, cstat;
 890         char *sense;
 891
 892         sense = (char *) irb->ecw;
 893         cstat = irb->scsw.cmd.cstat;
 894         dstat = irb->scsw.cmd.dstat;
 895
 896         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 897                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 898                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 899                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 900                 dev_warn(&cdev->dev, "The qeth device driver "
 901                         "failed to recover an error on the device\n");
 902                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 903                                  CCW_DEVID(cdev), dstat, cstat);
 904                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 905                                 16, 1, irb, 64, 1);
 906                 return -EIO;
 907         }
 908
 909         if (dstat & DEV_STAT_UNIT_CHECK) {
 910                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 911                     SENSE_RESETTING_EVENT_FLAG) {
 912                         QETH_CARD_TEXT(card, 2, "REVIND");
 913                         return -EIO;
 914                 }
 915                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 916                     SENSE_COMMAND_REJECT_FLAG) {
 917                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 918                         return -EIO;
 919                 }
 920                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 921                         QETH_CARD_TEXT(card, 2, "AFFE");
 922                         return -EIO;
 923                 }
 924                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 925                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 926                         return 0;
 927                 }
 928                 QETH_CARD_TEXT(card, 2, "DGENCHK");
 929                         return -EIO;
 930         }
 931         return 0;
 932 }
 933
 934 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
 935                                 struct irb *irb)
 936 {
 937         if (!IS_ERR(irb))
 938                 return 0;
 939
 940         switch (PTR_ERR(irb)) {
 941         case -EIO:
 942                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
 943                                  CCW_DEVID(cdev));
 944                 QETH_CARD_TEXT(card, 2, "ckirberr");
 945                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 946                 return -EIO;
 947         case -ETIMEDOUT:
 948                 dev_warn(&cdev->dev, "A hardware operation timed out"
 949                         " on the device\n");
 950                 QETH_CARD_TEXT(card, 2, "ckirberr");
 951                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
 952                 return -ETIMEDOUT;
 953         default:
 954                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
 955                                  PTR_ERR(irb), CCW_DEVID(cdev));
 956                 QETH_CARD_TEXT(card, 2, "ckirberr");
 957                 QETH_CARD_TEXT(card, 2, "  rc???");
 958                 return PTR_ERR(irb);
 959         }
 960 }
 961
 962 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 963                 struct irb *irb)
 964 {
 965         int rc;
 966         int cstat, dstat;
 967         struct qeth_cmd_buffer *iob = NULL;
 968         struct ccwgroup_device *gdev;
 969         struct qeth_channel *channel;
 970         struct qeth_card *card;
 971
 972         /* while we hold the ccwdev lock, this stays valid: */
 973         gdev = dev_get_drvdata(&cdev->dev);
 974         card = dev_get_drvdata(&gdev->dev);
 975         if (!card)
 976                 return;
 977
 978         QETH_CARD_TEXT(card, 5, "irq");
 979
 980         if (card->read.ccwdev == cdev) {
 981                 channel = &card->read;
 982                 QETH_CARD_TEXT(card, 5, "read");
 983         } else if (card->write.ccwdev == cdev) {
 984                 channel = &card->write;
 985                 QETH_CARD_TEXT(card, 5, "write");
 986         } else {
 987                 channel = &card->data;
 988                 QETH_CARD_TEXT(card, 5, "data");
 989         }
 990
 991         if (intparm == 0) {
 992                 QETH_CARD_TEXT(card, 5, "irqunsol");
 993         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
 994                 QETH_CARD_TEXT(card, 5, "irqunexp");
 995
 996                 dev_err(&cdev->dev,
 997                         "Received IRQ with intparm %lx, expected %px\n",
 998                         intparm, channel->active_cmd);
 999                 if (channel->active_cmd)
1000                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1001         } else {
1002                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1003         }
1004
1005         channel->active_cmd = NULL;
1006
1007         rc = qeth_check_irb_error(card, cdev, irb);
1008         if (rc) {
1009                 /* IO was terminated, free its resources. */
1010                 if (iob)
1011                         qeth_cancel_cmd(iob, rc);
1012                 atomic_set(&channel->irq_pending, 0);
1013                 wake_up(&card->wait_q);
1014                 return;
1015         }
1016
1017         atomic_set(&channel->irq_pending, 0);
1018
1019         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1020                 channel->state = CH_STATE_STOPPED;
1021
1022         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1023                 channel->state = CH_STATE_HALTED;
1024
1025         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1026                                           SCSW_FCTL_HALT_FUNC))) {
1027                 qeth_cancel_cmd(iob, -ECANCELED);
1028                 iob = NULL;
1029         }
1030
1031         cstat = irb->scsw.cmd.cstat;
1032         dstat = irb->scsw.cmd.dstat;
1033
1034         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1035             (dstat & DEV_STAT_UNIT_CHECK) ||
1036             (cstat)) {
1037                 if (irb->esw.esw0.erw.cons) {
1038                         dev_warn(&channel->ccwdev->dev,
1039                                 "The qeth device driver failed to recover "
1040                                 "an error on the device\n");
1041                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1042                                          CCW_DEVID(channel->ccwdev), cstat,
1043                                          dstat);
1044                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1045                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1046                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1047                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1048                 }
1049
1050                 rc = qeth_get_problem(card, cdev, irb);
1051                 if (rc) {
1052                         card->read_or_write_problem = 1;
1053                         if (iob)
1054                                 qeth_cancel_cmd(iob, rc);
1055                         qeth_clear_ipacmd_list(card);
1056                         qeth_schedule_recovery(card);
1057                         goto out;
1058                 }
1059         }
1060
1061         if (iob) {
1062                 /* sanity check: */
1063                 if (irb->scsw.cmd.count > iob->length) {
1064                         qeth_cancel_cmd(iob, -EIO);
1065                         goto out;
1066                 }
1067                 if (iob->callback)
1068                         iob->callback(card, iob,
1069                                       iob->length - irb->scsw.cmd.count);
1070         }
1071
1072 out:
1073         wake_up(&card->wait_q);
1074         return;
1075 }
1076
1077 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1078                 struct qeth_qdio_out_buffer *buf,
1079                 enum iucv_tx_notify notification)
1080 {
1081         struct sk_buff *skb;
1082
1083         skb_queue_walk(&buf->skb_list, skb) {
1084                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1085                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1086                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1087                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1088         }
1089 }
1090
1091 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1092                                  int budget)
1093 {
1094         struct qeth_qdio_out_q *queue = buf->q;
1095         struct sk_buff *skb;
1096
1097         /* release may never happen from within CQ tasklet scope */
1098         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1099
1100         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1101                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1102
1103         /* Empty buffer? */
1104         if (buf->next_element_to_fill == 0)
1105                 return;
1106
1107         QETH_TXQ_STAT_INC(queue, bufs);
1108         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1109         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1110                 unsigned int bytes = qdisc_pkt_len(skb);
1111                 bool is_tso = skb_is_gso(skb);
1112                 unsigned int packets;
1113
1114                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1115                 if (error) {
1116                         QETH_TXQ_STAT_ADD(queue, tx_errors, packets);
1117                 } else {
1118                         QETH_TXQ_STAT_ADD(queue, tx_packets, packets);
1119                         QETH_TXQ_STAT_ADD(queue, tx_bytes, bytes);
1120                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1121                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1122                         if (skb_is_nonlinear(skb))
1123                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1124                         if (is_tso) {
1125                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1126                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1127                         }
1128                 }
1129
1130                 napi_consume_skb(skb, budget);
1131         }
1132 }
1133
1134 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1135                                      struct qeth_qdio_out_buffer *buf,
1136                                      bool error, int budget)
1137 {
1138         int i;
1139
1140         /* is PCI flag set on buffer? */
1141         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1142                 atomic_dec(&queue->set_pci_flags_count);
1143
1144         qeth_tx_complete_buf(buf, error, budget);
1145
1146         for (i = 0; i < queue->max_elements; ++i) {
1147                 if (buf->buffer->element[i].addr && buf->is_header[i])
1148                         kmem_cache_free(qeth_core_header_cache,
1149                                 buf->buffer->element[i].addr);
1150                 buf->is_header[i] = 0;
1151         }
1152
1153         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1154         buf->next_element_to_fill = 0;
1155         buf->bytes = 0;
1156         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1157 }
1158
1159 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1160 {
1161         int j;
1162
1163         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1164                 if (!q->bufs[j])
1165                         continue;
1166                 qeth_cleanup_handled_pending(q, j, 1);
1167                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1168                 if (free) {
1169                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1170                         q->bufs[j] = NULL;
1171                 }
1172         }
1173 }
1174
1175 void qeth_drain_output_queues(struct qeth_card *card)
1176 {
1177         int i;
1178
1179         QETH_CARD_TEXT(card, 2, "clearqdbf");
1180         /* clear outbound buffers to free skbs */
1181         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1182                 if (card->qdio.out_qs[i])
1183                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1184         }
1185 }
1186 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1187
1188 static void qeth_free_buffer_pool(struct qeth_card *card)
1189 {
1190         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1191         int i = 0;
1192         list_for_each_entry_safe(pool_entry, tmp,
1193                                  &card->qdio.init_pool.entry_list, init_list){
1194                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1195                         free_page((unsigned long)pool_entry->elements[i]);
1196                 list_del(&pool_entry->init_list);
1197                 kfree(pool_entry);
1198         }
1199 }
1200
1201 static void qeth_clean_channel(struct qeth_channel *channel)
1202 {
1203         struct ccw_device *cdev = channel->ccwdev;
1204
1205         QETH_DBF_TEXT(SETUP, 2, "freech");
1206
1207         spin_lock_irq(get_ccwdev_lock(cdev));
1208         cdev->handler = NULL;
1209         spin_unlock_irq(get_ccwdev_lock(cdev));
1210 }
1211
1212 static void qeth_setup_channel(struct qeth_channel *channel)
1213 {
1214         struct ccw_device *cdev = channel->ccwdev;
1215
1216         QETH_DBF_TEXT(SETUP, 2, "setupch");
1217
1218         channel->state = CH_STATE_DOWN;
1219         atomic_set(&channel->irq_pending, 0);
1220
1221         spin_lock_irq(get_ccwdev_lock(cdev));
1222         cdev->handler = qeth_irq;
1223         spin_unlock_irq(get_ccwdev_lock(cdev));
1224 }
1225
1226 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1227 {
1228         unsigned int count = single ? 1 : card->dev->num_tx_queues;
1229         int rc;
1230
1231         rtnl_lock();
1232         rc = netif_set_real_num_tx_queues(card->dev, count);
1233         rtnl_unlock();
1234
1235         if (rc)
1236                 return rc;
1237
1238         if (card->qdio.no_out_queues == count)
1239                 return 0;
1240
1241         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1242                 qeth_free_qdio_queues(card);
1243
1244         if (count == 1)
1245                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1246
1247         card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1248         card->qdio.no_out_queues = count;
1249         return 0;
1250 }
1251
1252 static int qeth_update_from_chp_desc(struct qeth_card *card)
1253 {
1254         struct ccw_device *ccwdev;
1255         struct channel_path_desc_fmt0 *chp_dsc;
1256         int rc = 0;
1257
1258         QETH_CARD_TEXT(card, 2, "chp_desc");
1259
1260         ccwdev = card->data.ccwdev;
1261         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1262         if (!chp_dsc)
1263                 return -ENOMEM;
1264
1265         card->info.func_level = 0x4100 + chp_dsc->desc;
1266
1267         if (IS_OSD(card) || IS_OSX(card))
1268                 /* CHPP field bit 6 == 1 -> single queue */
1269                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1270
1271         kfree(chp_dsc);
1272         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1273         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1274         return rc;
1275 }
1276
1277 static void qeth_init_qdio_info(struct qeth_card *card)
1278 {
1279         QETH_CARD_TEXT(card, 4, "intqdinf");
1280         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1281         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1282         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1283
1284         /* inbound */
1285         card->qdio.no_in_queues = 1;
1286         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1287         if (IS_IQD(card))
1288                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1289         else
1290                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1291         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1292         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1293         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1294 }
1295
1296 static void qeth_set_initial_options(struct qeth_card *card)
1297 {
1298         card->options.route4.type = NO_ROUTER;
1299         card->options.route6.type = NO_ROUTER;
1300         card->options.rx_sg_cb = QETH_RX_SG_CB;
1301         card->options.isolation = ISOLATION_MODE_NONE;
1302         card->options.cq = QETH_CQ_DISABLED;
1303         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1304 }
1305
1306 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1307 {
1308         unsigned long flags;
1309         int rc = 0;
1310
1311         spin_lock_irqsave(&card->thread_mask_lock, flags);
1312         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1313                         (u8) card->thread_start_mask,
1314                         (u8) card->thread_allowed_mask,
1315                         (u8) card->thread_running_mask);
1316         rc = (card->thread_start_mask & thread);
1317         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1318         return rc;
1319 }
1320
1321 static void qeth_start_kernel_thread(struct work_struct *work)
1322 {
1323         struct task_struct *ts;
1324         struct qeth_card *card = container_of(work, struct qeth_card,
1325                                         kernel_thread_starter);
1326         QETH_CARD_TEXT(card , 2, "strthrd");
1327
1328         if (card->read.state != CH_STATE_UP &&
1329             card->write.state != CH_STATE_UP)
1330                 return;
1331         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1332                 ts = kthread_run(card->discipline->recover, (void *)card,
1333                                 "qeth_recover");
1334                 if (IS_ERR(ts)) {
1335                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1336                         qeth_clear_thread_running_bit(card,
1337                                 QETH_RECOVER_THREAD);
1338                 }
1339         }
1340 }
1341
1342 static void qeth_buffer_reclaim_work(struct work_struct *);
1343 static void qeth_setup_card(struct qeth_card *card)
1344 {
1345         QETH_CARD_TEXT(card, 2, "setupcrd");
1346
1347         card->info.type = CARD_RDEV(card)->id.driver_info;
1348         card->state = CARD_STATE_DOWN;
1349         spin_lock_init(&card->lock);
1350         spin_lock_init(&card->thread_mask_lock);
1351         mutex_init(&card->conf_mutex);
1352         mutex_init(&card->discipline_mutex);
1353         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1354         INIT_LIST_HEAD(&card->cmd_waiter_list);
1355         init_waitqueue_head(&card->wait_q);
1356         qeth_set_initial_options(card);
1357         /* IP address takeover */
1358         INIT_LIST_HEAD(&card->ipato.entries);
1359         qeth_init_qdio_info(card);
1360         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1361         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1362 }
1363
1364 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1365 {
1366         struct qeth_card *card = container_of(slr, struct qeth_card,
1367                                         qeth_service_level);
1368         if (card->info.mcl_level[0])
1369                 seq_printf(m, "qeth: %s firmware level %s\n",
1370                         CARD_BUS_ID(card), card->info.mcl_level);
1371 }
1372
1373 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1374 {
1375         struct qeth_card *card;
1376
1377         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1378         card = kzalloc(sizeof(*card), GFP_KERNEL);
1379         if (!card)
1380                 goto out;
1381         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1382
1383         card->gdev = gdev;
1384         dev_set_drvdata(&gdev->dev, card);
1385         CARD_RDEV(card) = gdev->cdev[0];
1386         CARD_WDEV(card) = gdev->cdev[1];
1387         CARD_DDEV(card) = gdev->cdev[2];
1388
1389         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1390                                                  dev_name(&gdev->dev));
1391         if (!card->event_wq)
1392                 goto out_wq;
1393
1394         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1395         if (!card->read_cmd)
1396                 goto out_read_cmd;
1397
1398         qeth_setup_channel(&card->read);
1399         qeth_setup_channel(&card->write);
1400         qeth_setup_channel(&card->data);
1401         card->qeth_service_level.seq_print = qeth_core_sl_print;
1402         register_service_level(&card->qeth_service_level);
1403         return card;
1404
1405 out_read_cmd:
1406         destroy_workqueue(card->event_wq);
1407 out_wq:
1408         dev_set_drvdata(&gdev->dev, NULL);
1409         kfree(card);
1410 out:
1411         return NULL;
1412 }
1413
1414 static int qeth_clear_channel(struct qeth_card *card,
1415                               struct qeth_channel *channel)
1416 {
1417         int rc;
1418
1419         QETH_CARD_TEXT(card, 3, "clearch");
1420         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1421         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1422         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1423
1424         if (rc)
1425                 return rc;
1426         rc = wait_event_interruptible_timeout(card->wait_q,
1427                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1428         if (rc == -ERESTARTSYS)
1429                 return rc;
1430         if (channel->state != CH_STATE_STOPPED)
1431                 return -ETIME;
1432         channel->state = CH_STATE_DOWN;
1433         return 0;
1434 }
1435
1436 static int qeth_halt_channel(struct qeth_card *card,
1437                              struct qeth_channel *channel)
1438 {
1439         int rc;
1440
1441         QETH_CARD_TEXT(card, 3, "haltch");
1442         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1443         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1444         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1445
1446         if (rc)
1447                 return rc;
1448         rc = wait_event_interruptible_timeout(card->wait_q,
1449                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1450         if (rc == -ERESTARTSYS)
1451                 return rc;
1452         if (channel->state != CH_STATE_HALTED)
1453                 return -ETIME;
1454         return 0;
1455 }
1456
1457 int qeth_stop_channel(struct qeth_channel *channel)
1458 {
1459         struct ccw_device *cdev = channel->ccwdev;
1460         int rc;
1461
1462         rc = ccw_device_set_offline(cdev);
1463
1464         spin_lock_irq(get_ccwdev_lock(cdev));
1465         if (channel->active_cmd) {
1466                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1467                         channel->active_cmd);
1468                 channel->active_cmd = NULL;
1469         }
1470         spin_unlock_irq(get_ccwdev_lock(cdev));
1471
1472         return rc;
1473 }
1474 EXPORT_SYMBOL_GPL(qeth_stop_channel);
1475
1476 static int qeth_halt_channels(struct qeth_card *card)
1477 {
1478         int rc1 = 0, rc2 = 0, rc3 = 0;
1479
1480         QETH_CARD_TEXT(card, 3, "haltchs");
1481         rc1 = qeth_halt_channel(card, &card->read);
1482         rc2 = qeth_halt_channel(card, &card->write);
1483         rc3 = qeth_halt_channel(card, &card->data);
1484         if (rc1)
1485                 return rc1;
1486         if (rc2)
1487                 return rc2;
1488         return rc3;
1489 }
1490
1491 static int qeth_clear_channels(struct qeth_card *card)
1492 {
1493         int rc1 = 0, rc2 = 0, rc3 = 0;
1494
1495         QETH_CARD_TEXT(card, 3, "clearchs");
1496         rc1 = qeth_clear_channel(card, &card->read);
1497         rc2 = qeth_clear_channel(card, &card->write);
1498         rc3 = qeth_clear_channel(card, &card->data);
1499         if (rc1)
1500                 return rc1;
1501         if (rc2)
1502                 return rc2;
1503         return rc3;
1504 }
1505
1506 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1507 {
1508         int rc = 0;
1509
1510         QETH_CARD_TEXT(card, 3, "clhacrd");
1511
1512         if (halt)
1513                 rc = qeth_halt_channels(card);
1514         if (rc)
1515                 return rc;
1516         return qeth_clear_channels(card);
1517 }
1518
1519 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1520 {
1521         int rc = 0;
1522
1523         QETH_CARD_TEXT(card, 3, "qdioclr");
1524         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1525                 QETH_QDIO_CLEANING)) {
1526         case QETH_QDIO_ESTABLISHED:
1527                 if (IS_IQD(card))
1528                         rc = qdio_shutdown(CARD_DDEV(card),
1529                                 QDIO_FLAG_CLEANUP_USING_HALT);
1530                 else
1531                         rc = qdio_shutdown(CARD_DDEV(card),
1532                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1533                 if (rc)
1534                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1535                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1536                 break;
1537         case QETH_QDIO_CLEANING:
1538                 return rc;
1539         default:
1540                 break;
1541         }
1542         rc = qeth_clear_halt_card(card, use_halt);
1543         if (rc)
1544                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1545         return rc;
1546 }
1547 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1548
1549 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1550 {
1551         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1552         struct diag26c_vnic_resp *response = NULL;
1553         struct diag26c_vnic_req *request = NULL;
1554         struct ccw_dev_id id;
1555         char userid[80];
1556         int rc = 0;
1557
1558         QETH_CARD_TEXT(card, 2, "vmlayer");
1559
1560         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1561         if (rc)
1562                 goto out;
1563
1564         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1565         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1566         if (!request || !response) {
1567                 rc = -ENOMEM;
1568                 goto out;
1569         }
1570
1571         ccw_device_get_id(CARD_RDEV(card), &id);
1572         request->resp_buf_len = sizeof(*response);
1573         request->resp_version = DIAG26C_VERSION6_VM65918;
1574         request->req_format = DIAG26C_VNIC_INFO;
1575         ASCEBC(userid, 8);
1576         memcpy(&request->sys_name, userid, 8);
1577         request->devno = id.devno;
1578
1579         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1580         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1581         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1582         if (rc)
1583                 goto out;
1584         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1585
1586         if (request->resp_buf_len < sizeof(*response) ||
1587             response->version != request->resp_version) {
1588                 rc = -EIO;
1589                 goto out;
1590         }
1591
1592         if (response->protocol == VNIC_INFO_PROT_L2)
1593                 disc = QETH_DISCIPLINE_LAYER2;
1594         else if (response->protocol == VNIC_INFO_PROT_L3)
1595                 disc = QETH_DISCIPLINE_LAYER3;
1596
1597 out:
1598         kfree(response);
1599         kfree(request);
1600         if (rc)
1601                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1602         return disc;
1603 }
1604
1605 /* Determine whether the device requires a specific layer discipline */
1606 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1607 {
1608         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1609
1610         if (IS_OSM(card) || IS_OSN(card))
1611                 disc = QETH_DISCIPLINE_LAYER2;
1612         else if (IS_VM_NIC(card))
1613                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1614                                       qeth_vm_detect_layer(card);
1615
1616         switch (disc) {
1617         case QETH_DISCIPLINE_LAYER2:
1618                 QETH_CARD_TEXT(card, 3, "force l2");
1619                 break;
1620         case QETH_DISCIPLINE_LAYER3:
1621                 QETH_CARD_TEXT(card, 3, "force l3");
1622                 break;
1623         default:
1624                 QETH_CARD_TEXT(card, 3, "force no");
1625         }
1626
1627         return disc;
1628 }
1629
1630 static void qeth_set_blkt_defaults(struct qeth_card *card)
1631 {
1632         QETH_CARD_TEXT(card, 2, "cfgblkt");
1633
1634         if (card->info.use_v1_blkt) {
1635                 card->info.blkt.time_total = 0;
1636                 card->info.blkt.inter_packet = 0;
1637                 card->info.blkt.inter_packet_jumbo = 0;
1638         } else {
1639                 card->info.blkt.time_total = 250;
1640                 card->info.blkt.inter_packet = 5;
1641                 card->info.blkt.inter_packet_jumbo = 15;
1642         }
1643 }
1644
1645 static void qeth_init_tokens(struct qeth_card *card)
1646 {
1647         card->token.issuer_rm_w = 0x00010103UL;
1648         card->token.cm_filter_w = 0x00010108UL;
1649         card->token.cm_connection_w = 0x0001010aUL;
1650         card->token.ulp_filter_w = 0x0001010bUL;
1651         card->token.ulp_connection_w = 0x0001010dUL;
1652 }
1653
1654 static void qeth_init_func_level(struct qeth_card *card)
1655 {
1656         switch (card->info.type) {
1657         case QETH_CARD_TYPE_IQD:
1658                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1659                 break;
1660         case QETH_CARD_TYPE_OSD:
1661         case QETH_CARD_TYPE_OSN:
1662                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1663                 break;
1664         default:
1665                 break;
1666         }
1667 }
1668
1669 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1670                                   struct qeth_cmd_buffer *iob)
1671 {
1672         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1673                QETH_SEQ_NO_LENGTH);
1674         if (iob->channel == &card->write)
1675                 card->seqno.trans_hdr++;
1676 }
1677
1678 static int qeth_peer_func_level(int level)
1679 {
1680         if ((level & 0xff) == 8)
1681                 return (level & 0xff) + 0x400;
1682         if (((level >> 8) & 3) == 1)
1683                 return (level & 0xff) + 0x200;
1684         return level;
1685 }
1686
1687 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1688                                   struct qeth_cmd_buffer *iob)
1689 {
1690         qeth_idx_finalize_cmd(card, iob);
1691
1692         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1693                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1694         card->seqno.pdu_hdr++;
1695         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1696                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1697
1698         iob->callback = qeth_release_buffer_cb;
1699 }
1700
1701 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1702                                                   void *data,
1703                                                   unsigned int data_length)
1704 {
1705         struct qeth_cmd_buffer *iob;
1706
1707         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1708         if (!iob)
1709                 return NULL;
1710
1711         memcpy(iob->data, data, data_length);
1712         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1713                        iob->data);
1714         iob->finalize = qeth_mpc_finalize_cmd;
1715         return iob;
1716 }
1717
1718 /**
1719  * qeth_send_control_data() -   send control command to the card
1720  * @card:                       qeth_card structure pointer
1721  * @iob:                        qeth_cmd_buffer pointer
1722  * @reply_cb:                   callback function pointer
1723  * @cb_card:                    pointer to the qeth_card structure
1724  * @cb_reply:                   pointer to the qeth_reply structure
1725  * @cb_cmd:                     pointer to the original iob for non-IPA
1726  *                              commands, or to the qeth_ipa_cmd structure
1727  *                              for the IPA commands.
1728  * @reply_param:                private pointer passed to the callback
1729  *
1730  * Callback function gets called one or more times, with cb_cmd
1731  * pointing to the response returned by the hardware. Callback
1732  * function must return
1733  *   > 0 if more reply blocks are expected,
1734  *     0 if the last or only reply block is received, and
1735  *   < 0 on error.
1736  * Callback function can get the value of the reply_param pointer from the
1737  * field 'param' of the structure qeth_reply.
1738  */
1739
1740 static int qeth_send_control_data(struct qeth_card *card,
1741                                   struct qeth_cmd_buffer *iob,
1742                                   int (*reply_cb)(struct qeth_card *cb_card,
1743                                                   struct qeth_reply *cb_reply,
1744                                                   unsigned long cb_cmd),
1745                                   void *reply_param)
1746 {
1747         struct qeth_channel *channel = iob->channel;
1748         struct qeth_reply *reply = &iob->reply;
1749         long timeout = iob->timeout;
1750         int rc;
1751
1752         QETH_CARD_TEXT(card, 2, "sendctl");
1753
1754         reply->callback = reply_cb;
1755         reply->param = reply_param;
1756
1757         timeout = wait_event_interruptible_timeout(card->wait_q,
1758                                                    qeth_trylock_channel(channel),
1759                                                    timeout);
1760         if (timeout <= 0) {
1761                 qeth_put_cmd(iob);
1762                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1763         }
1764
1765         if (iob->finalize)
1766                 iob->finalize(card, iob);
1767         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1768
1769         qeth_enqueue_cmd(card, iob);
1770
1771         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1772         qeth_get_cmd(iob);
1773
1774         QETH_CARD_TEXT(card, 6, "noirqpnd");
1775         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1776         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1777                                       (addr_t) iob, 0, 0, timeout);
1778         if (!rc)
1779                 channel->active_cmd = iob;
1780         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1781         if (rc) {
1782                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1783                                  CARD_DEVID(card), rc);
1784                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1785                 qeth_dequeue_cmd(card, iob);
1786                 qeth_put_cmd(iob);
1787                 atomic_set(&channel->irq_pending, 0);
1788                 wake_up(&card->wait_q);
1789                 goto out;
1790         }
1791
1792         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1793                                                             timeout);
1794         if (timeout <= 0)
1795                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1796
1797         qeth_dequeue_cmd(card, iob);
1798
1799         if (reply_cb) {
1800                 /* Wait until the callback for a late reply has completed: */
1801                 spin_lock_irq(&iob->lock);
1802                 if (rc)
1803                         /* Zap any callback that's still pending: */
1804                         iob->rc = rc;
1805                 spin_unlock_irq(&iob->lock);
1806         }
1807
1808         if (!rc)
1809                 rc = iob->rc;
1810
1811 out:
1812         qeth_put_cmd(iob);
1813         return rc;
1814 }
1815
1816 struct qeth_node_desc {
1817         struct node_descriptor nd1;
1818         struct node_descriptor nd2;
1819         struct node_descriptor nd3;
1820 };
1821
1822 static void qeth_read_conf_data_cb(struct qeth_card *card,
1823                                    struct qeth_cmd_buffer *iob,
1824                                    unsigned int data_length)
1825 {
1826         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
1827         int rc = 0;
1828         u8 *tag;
1829
1830         QETH_CARD_TEXT(card, 2, "cfgunit");
1831
1832         if (data_length < sizeof(*nd)) {
1833                 rc = -EINVAL;
1834                 goto out;
1835         }
1836
1837         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
1838                                nd->nd1.plant[1] == _ascebc['M'];
1839         tag = (u8 *)&nd->nd1.tag;
1840         card->info.chpid = tag[0];
1841         card->info.unit_addr2 = tag[1];
1842
1843         tag = (u8 *)&nd->nd2.tag;
1844         card->info.cula = tag[1];
1845
1846         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
1847                                  nd->nd3.model[1] == 0xF0 &&
1848                                  nd->nd3.model[2] >= 0xF1 &&
1849                                  nd->nd3.model[2] <= 0xF4;
1850
1851 out:
1852         qeth_notify_cmd(iob, rc);
1853         qeth_put_cmd(iob);
1854 }
1855
1856 static int qeth_read_conf_data(struct qeth_card *card)
1857 {
1858         struct qeth_channel *channel = &card->data;
1859         struct qeth_cmd_buffer *iob;
1860         struct ciw *ciw;
1861
1862         /* scan for RCD command in extended SenseID data */
1863         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1864         if (!ciw || ciw->cmd == 0)
1865                 return -EOPNOTSUPP;
1866         if (ciw->count < sizeof(struct qeth_node_desc))
1867                 return -EINVAL;
1868
1869         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
1870         if (!iob)
1871                 return -ENOMEM;
1872
1873         iob->callback = qeth_read_conf_data_cb;
1874         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
1875                        iob->data);
1876
1877         return qeth_send_control_data(card, iob, NULL, NULL);
1878 }
1879
1880 static int qeth_idx_check_activate_response(struct qeth_card *card,
1881                                             struct qeth_channel *channel,
1882                                             struct qeth_cmd_buffer *iob)
1883 {
1884         int rc;
1885
1886         rc = qeth_check_idx_response(card, iob->data);
1887         if (rc)
1888                 return rc;
1889
1890         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1891                 return 0;
1892
1893         /* negative reply: */
1894         QETH_CARD_TEXT_(card, 2, "idxneg%c",
1895                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1896
1897         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1898         case QETH_IDX_ACT_ERR_EXCL:
1899                 dev_err(&channel->ccwdev->dev,
1900                         "The adapter is used exclusively by another host\n");
1901                 return -EBUSY;
1902         case QETH_IDX_ACT_ERR_AUTH:
1903         case QETH_IDX_ACT_ERR_AUTH_USER:
1904                 dev_err(&channel->ccwdev->dev,
1905                         "Setting the device online failed because of insufficient authorization\n");
1906                 return -EPERM;
1907         default:
1908                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1909                                  CCW_DEVID(channel->ccwdev));
1910                 return -EIO;
1911         }
1912 }
1913
1914 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
1915                                               struct qeth_cmd_buffer *iob,
1916                                               unsigned int data_length)
1917 {
1918         struct qeth_channel *channel = iob->channel;
1919         u16 peer_level;
1920         int rc;
1921
1922         QETH_CARD_TEXT(card, 2, "idxrdcb");
1923
1924         rc = qeth_idx_check_activate_response(card, channel, iob);
1925         if (rc)
1926                 goto out;
1927
1928         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1929         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1930                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1931                                  CCW_DEVID(channel->ccwdev),
1932                                  card->info.func_level, peer_level);
1933                 rc = -EINVAL;
1934                 goto out;
1935         }
1936
1937         memcpy(&card->token.issuer_rm_r,
1938                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1939                QETH_MPC_TOKEN_LENGTH);
1940         memcpy(&card->info.mcl_level[0],
1941                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1942
1943 out:
1944         qeth_notify_cmd(iob, rc);
1945         qeth_put_cmd(iob);
1946 }
1947
1948 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
1949                                                struct qeth_cmd_buffer *iob,
1950                                                unsigned int data_length)
1951 {
1952         struct qeth_channel *channel = iob->channel;
1953         u16 peer_level;
1954         int rc;
1955
1956         QETH_CARD_TEXT(card, 2, "idxwrcb");
1957
1958         rc = qeth_idx_check_activate_response(card, channel, iob);
1959         if (rc)
1960                 goto out;
1961
1962         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1963         if ((peer_level & ~0x0100) !=
1964             qeth_peer_func_level(card->info.func_level)) {
1965                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1966                                  CCW_DEVID(channel->ccwdev),
1967                                  card->info.func_level, peer_level);
1968                 rc = -EINVAL;
1969         }
1970
1971 out:
1972         qeth_notify_cmd(iob, rc);
1973         qeth_put_cmd(iob);
1974 }
1975
1976 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1977                                         struct qeth_cmd_buffer *iob)
1978 {
1979         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1980         u8 port = ((u8)card->dev->dev_port) | 0x80;
1981         struct ccw1 *ccw = __ccw_from_cmd(iob);
1982         struct ccw_dev_id dev_id;
1983
1984         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
1985                        iob->data);
1986         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
1987         ccw_device_get_id(CARD_DDEV(card), &dev_id);
1988         iob->finalize = qeth_idx_finalize_cmd;
1989
1990         port |= QETH_IDX_ACT_INVAL_FRAME;
1991         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1992         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1993                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1994         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1995                &card->info.func_level, 2);
1996         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1997         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1998 }
1999
2000 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2001 {
2002         struct qeth_channel *channel = &card->read;
2003         struct qeth_cmd_buffer *iob;
2004         int rc;
2005
2006         QETH_CARD_TEXT(card, 2, "idxread");
2007
2008         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2009         if (!iob)
2010                 return -ENOMEM;
2011
2012         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2013         qeth_idx_setup_activate_cmd(card, iob);
2014         iob->callback = qeth_idx_activate_read_channel_cb;
2015
2016         rc = qeth_send_control_data(card, iob, NULL, NULL);
2017         if (rc)
2018                 return rc;
2019
2020         channel->state = CH_STATE_UP;
2021         return 0;
2022 }
2023
2024 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2025 {
2026         struct qeth_channel *channel = &card->write;
2027         struct qeth_cmd_buffer *iob;
2028         int rc;
2029
2030         QETH_CARD_TEXT(card, 2, "idxwrite");
2031
2032         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2033         if (!iob)
2034                 return -ENOMEM;
2035
2036         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2037         qeth_idx_setup_activate_cmd(card, iob);
2038         iob->callback = qeth_idx_activate_write_channel_cb;
2039
2040         rc = qeth_send_control_data(card, iob, NULL, NULL);
2041         if (rc)
2042                 return rc;
2043
2044         channel->state = CH_STATE_UP;
2045         return 0;
2046 }
2047
2048 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2049                 unsigned long data)
2050 {
2051         struct qeth_cmd_buffer *iob;
2052
2053         QETH_CARD_TEXT(card, 2, "cmenblcb");
2054
2055         iob = (struct qeth_cmd_buffer *) data;
2056         memcpy(&card->token.cm_filter_r,
2057                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2058                QETH_MPC_TOKEN_LENGTH);
2059         return 0;
2060 }
2061
2062 static int qeth_cm_enable(struct qeth_card *card)
2063 {
2064         struct qeth_cmd_buffer *iob;
2065
2066         QETH_CARD_TEXT(card, 2, "cmenable");
2067
2068         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2069         if (!iob)
2070                 return -ENOMEM;
2071
2072         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2073                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2074         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2075                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2076
2077         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2078 }
2079
2080 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2081                 unsigned long data)
2082 {
2083         struct qeth_cmd_buffer *iob;
2084
2085         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2086
2087         iob = (struct qeth_cmd_buffer *) data;
2088         memcpy(&card->token.cm_connection_r,
2089                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2090                QETH_MPC_TOKEN_LENGTH);
2091         return 0;
2092 }
2093
2094 static int qeth_cm_setup(struct qeth_card *card)
2095 {
2096         struct qeth_cmd_buffer *iob;
2097
2098         QETH_CARD_TEXT(card, 2, "cmsetup");
2099
2100         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2101         if (!iob)
2102                 return -ENOMEM;
2103
2104         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2105                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2106         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2107                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2108         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2109                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2110         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2111 }
2112
2113 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2114 {
2115         struct net_device *dev = card->dev;
2116         unsigned int new_mtu;
2117
2118         if (!max_mtu) {
2119                 /* IQD needs accurate max MTU to set up its RX buffers: */
2120                 if (IS_IQD(card))
2121                         return -EINVAL;
2122                 /* tolerate quirky HW: */
2123                 max_mtu = ETH_MAX_MTU;
2124         }
2125
2126         rtnl_lock();
2127         if (IS_IQD(card)) {
2128                 /* move any device with default MTU to new max MTU: */
2129                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2130
2131                 /* adjust RX buffer size to new max MTU: */
2132                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2133                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2134                         qeth_free_qdio_queues(card);
2135         } else {
2136                 if (dev->mtu)
2137                         new_mtu = dev->mtu;
2138                 /* default MTUs for first setup: */
2139                 else if (IS_LAYER2(card))
2140                         new_mtu = ETH_DATA_LEN;
2141                 else
2142                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2143         }
2144
2145         dev->max_mtu = max_mtu;
2146         dev->mtu = min(new_mtu, max_mtu);
2147         rtnl_unlock();
2148         return 0;
2149 }
2150
2151 static int qeth_get_mtu_outof_framesize(int framesize)
2152 {
2153         switch (framesize) {
2154         case 0x4000:
2155                 return 8192;
2156         case 0x6000:
2157                 return 16384;
2158         case 0xa000:
2159                 return 32768;
2160         case 0xffff:
2161                 return 57344;
2162         default:
2163                 return 0;
2164         }
2165 }
2166
2167 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2168                 unsigned long data)
2169 {
2170         __u16 mtu, framesize;
2171         __u16 len;
2172         __u8 link_type;
2173         struct qeth_cmd_buffer *iob;
2174
2175         QETH_CARD_TEXT(card, 2, "ulpenacb");
2176
2177         iob = (struct qeth_cmd_buffer *) data;
2178         memcpy(&card->token.ulp_filter_r,
2179                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2180                QETH_MPC_TOKEN_LENGTH);
2181         if (IS_IQD(card)) {
2182                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2183                 mtu = qeth_get_mtu_outof_framesize(framesize);
2184         } else {
2185                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2186         }
2187         *(u16 *)reply->param = mtu;
2188
2189         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2190         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2191                 memcpy(&link_type,
2192                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2193                 card->info.link_type = link_type;
2194         } else
2195                 card->info.link_type = 0;
2196         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2197         return 0;
2198 }
2199
2200 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2201 {
2202         if (IS_OSN(card))
2203                 return QETH_PROT_OSN2;
2204         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2205 }
2206
2207 static int qeth_ulp_enable(struct qeth_card *card)
2208 {
2209         u8 prot_type = qeth_mpc_select_prot_type(card);
2210         struct qeth_cmd_buffer *iob;
2211         u16 max_mtu;
2212         int rc;
2213
2214         QETH_CARD_TEXT(card, 2, "ulpenabl");
2215
2216         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2217         if (!iob)
2218                 return -ENOMEM;
2219
2220         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2221         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2222         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2223                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2224         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2225                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2226         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2227         if (rc)
2228                 return rc;
2229         return qeth_update_max_mtu(card, max_mtu);
2230 }
2231
2232 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2233                 unsigned long data)
2234 {
2235         struct qeth_cmd_buffer *iob;
2236
2237         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2238
2239         iob = (struct qeth_cmd_buffer *) data;
2240         memcpy(&card->token.ulp_connection_r,
2241                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2242                QETH_MPC_TOKEN_LENGTH);
2243         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2244                      3)) {
2245                 QETH_CARD_TEXT(card, 2, "olmlimit");
2246                 dev_err(&card->gdev->dev, "A connection could not be "
2247                         "established because of an OLM limit\n");
2248                 return -EMLINK;
2249         }
2250         return 0;
2251 }
2252
2253 static int qeth_ulp_setup(struct qeth_card *card)
2254 {
2255         __u16 temp;
2256         struct qeth_cmd_buffer *iob;
2257         struct ccw_dev_id dev_id;
2258
2259         QETH_CARD_TEXT(card, 2, "ulpsetup");
2260
2261         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2262         if (!iob)
2263                 return -ENOMEM;
2264
2265         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2266                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2267         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2268                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2269         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2270                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2271
2272         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2273         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2274         temp = (card->info.cula << 8) + card->info.unit_addr2;
2275         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2276         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2277 }
2278
2279 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2280 {
2281         struct qeth_qdio_out_buffer *newbuf;
2282
2283         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2284         if (!newbuf)
2285                 return -ENOMEM;
2286
2287         newbuf->buffer = q->qdio_bufs[bidx];
2288         skb_queue_head_init(&newbuf->skb_list);
2289         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2290         newbuf->q = q;
2291         newbuf->next_pending = q->bufs[bidx];
2292         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2293         q->bufs[bidx] = newbuf;
2294         return 0;
2295 }
2296
2297 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2298 {
2299         if (!q)
2300                 return;
2301
2302         qeth_drain_output_queue(q, true);
2303         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2304         kfree(q);
2305 }
2306
2307 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2308 {
2309         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2310
2311         if (!q)
2312                 return NULL;
2313
2314         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2315                 kfree(q);
2316                 return NULL;
2317         }
2318         return q;
2319 }
2320
2321 static void qeth_tx_completion_timer(struct timer_list *timer)
2322 {
2323         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2324
2325         napi_schedule(&queue->napi);
2326         QETH_TXQ_STAT_INC(queue, completion_timer);
2327 }
2328
2329 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2330 {
2331         int i, j;
2332
2333         QETH_CARD_TEXT(card, 2, "allcqdbf");
2334
2335         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2336                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2337                 return 0;
2338
2339         QETH_CARD_TEXT(card, 2, "inq");
2340         card->qdio.in_q = qeth_alloc_qdio_queue();
2341         if (!card->qdio.in_q)
2342                 goto out_nomem;
2343
2344         /* inbound buffer pool */
2345         if (qeth_alloc_buffer_pool(card))
2346                 goto out_freeinq;
2347
2348         /* outbound */
2349         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2350                 struct qeth_qdio_out_q *queue;
2351
2352                 queue = qeth_alloc_output_queue();
2353                 if (!queue)
2354                         goto out_freeoutq;
2355                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2356                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2357                 card->qdio.out_qs[i] = queue;
2358                 queue->card = card;
2359                 queue->queue_no = i;
2360                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2361
2362                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2363                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2364                         WARN_ON(queue->bufs[j]);
2365                         if (qeth_init_qdio_out_buf(queue, j))
2366                                 goto out_freeoutqbufs;
2367                 }
2368         }
2369
2370         /* completion */
2371         if (qeth_alloc_cq(card))
2372                 goto out_freeoutq;
2373
2374         return 0;
2375
2376 out_freeoutqbufs:
2377         while (j > 0) {
2378                 --j;
2379                 kmem_cache_free(qeth_qdio_outbuf_cache,
2380                                 card->qdio.out_qs[i]->bufs[j]);
2381                 card->qdio.out_qs[i]->bufs[j] = NULL;
2382         }
2383 out_freeoutq:
2384         while (i > 0) {
2385                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2386                 card->qdio.out_qs[i] = NULL;
2387         }
2388         qeth_free_buffer_pool(card);
2389 out_freeinq:
2390         qeth_free_qdio_queue(card->qdio.in_q);
2391         card->qdio.in_q = NULL;
2392 out_nomem:
2393         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2394         return -ENOMEM;
2395 }
2396
2397 static void qeth_free_qdio_queues(struct qeth_card *card)
2398 {
2399         int i, j;
2400
2401         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2402                 QETH_QDIO_UNINITIALIZED)
2403                 return;
2404
2405         qeth_free_cq(card);
2406         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2407         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2408                 if (card->qdio.in_q->bufs[j].rx_skb)
2409                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2410         }
2411         qeth_free_qdio_queue(card->qdio.in_q);
2412         card->qdio.in_q = NULL;
2413         /* inbound buffer pool */
2414         qeth_free_buffer_pool(card);
2415         /* free outbound qdio_qs */
2416         for (i = 0; i < card->qdio.no_out_queues; i++) {
2417                 qeth_free_output_queue(card->qdio.out_qs[i]);
2418                 card->qdio.out_qs[i] = NULL;
2419         }
2420 }
2421
2422 static void qeth_create_qib_param_field(struct qeth_card *card,
2423                 char *param_field)
2424 {
2425
2426         param_field[0] = _ascebc['P'];
2427         param_field[1] = _ascebc['C'];
2428         param_field[2] = _ascebc['I'];
2429         param_field[3] = _ascebc['T'];
2430         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2431         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2432         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2433 }
2434
2435 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2436                 char *param_field)
2437 {
2438         param_field[16] = _ascebc['B'];
2439         param_field[17] = _ascebc['L'];
2440         param_field[18] = _ascebc['K'];
2441         param_field[19] = _ascebc['T'];
2442         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2443         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2444         *((unsigned int *) (&param_field[28])) =
2445                 card->info.blkt.inter_packet_jumbo;
2446 }
2447
2448 static int qeth_qdio_activate(struct qeth_card *card)
2449 {
2450         QETH_CARD_TEXT(card, 3, "qdioact");
2451         return qdio_activate(CARD_DDEV(card));
2452 }
2453
2454 static int qeth_dm_act(struct qeth_card *card)
2455 {
2456         struct qeth_cmd_buffer *iob;
2457
2458         QETH_CARD_TEXT(card, 2, "dmact");
2459
2460         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2461         if (!iob)
2462                 return -ENOMEM;
2463
2464         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2465                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2466         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2467                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2468         return qeth_send_control_data(card, iob, NULL, NULL);
2469 }
2470
2471 static int qeth_mpc_initialize(struct qeth_card *card)
2472 {
2473         int rc;
2474
2475         QETH_CARD_TEXT(card, 2, "mpcinit");
2476
2477         rc = qeth_issue_next_read(card);
2478         if (rc) {
2479                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2480                 return rc;
2481         }
2482         rc = qeth_cm_enable(card);
2483         if (rc) {
2484                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2485                 goto out_qdio;
2486         }
2487         rc = qeth_cm_setup(card);
2488         if (rc) {
2489                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2490                 goto out_qdio;
2491         }
2492         rc = qeth_ulp_enable(card);
2493         if (rc) {
2494                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2495                 goto out_qdio;
2496         }
2497         rc = qeth_ulp_setup(card);
2498         if (rc) {
2499                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2500                 goto out_qdio;
2501         }
2502         rc = qeth_alloc_qdio_queues(card);
2503         if (rc) {
2504                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2505                 goto out_qdio;
2506         }
2507         rc = qeth_qdio_establish(card);
2508         if (rc) {
2509                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2510                 qeth_free_qdio_queues(card);
2511                 goto out_qdio;
2512         }
2513         rc = qeth_qdio_activate(card);
2514         if (rc) {
2515                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2516                 goto out_qdio;
2517         }
2518         rc = qeth_dm_act(card);
2519         if (rc) {
2520                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2521                 goto out_qdio;
2522         }
2523
2524         return 0;
2525 out_qdio:
2526         qeth_qdio_clear_card(card, !IS_IQD(card));
2527         qdio_free(CARD_DDEV(card));
2528         return rc;
2529 }
2530
2531 void qeth_print_status_message(struct qeth_card *card)
2532 {
2533         switch (card->info.type) {
2534         case QETH_CARD_TYPE_OSD:
2535         case QETH_CARD_TYPE_OSM:
2536         case QETH_CARD_TYPE_OSX:
2537                 /* VM will use a non-zero first character
2538                  * to indicate a HiperSockets like reporting
2539                  * of the level OSA sets the first character to zero
2540                  * */
2541                 if (!card->info.mcl_level[0]) {
2542                         sprintf(card->info.mcl_level, "%02x%02x",
2543                                 card->info.mcl_level[2],
2544                                 card->info.mcl_level[3]);
2545                         break;
2546                 }
2547                 /* fallthrough */
2548         case QETH_CARD_TYPE_IQD:
2549                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2550                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2551                                 card->info.mcl_level[0]];
2552                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2553                                 card->info.mcl_level[1]];
2554                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2555                                 card->info.mcl_level[2]];
2556                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2557                                 card->info.mcl_level[3]];
2558                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2559                 }
2560                 break;
2561         default:
2562                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2563         }
2564         dev_info(&card->gdev->dev,
2565                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2566                  qeth_get_cardname(card),
2567                  (card->info.mcl_level[0]) ? " (level: " : "",
2568                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2569                  (card->info.mcl_level[0]) ? ")" : "",
2570                  qeth_get_cardname_short(card));
2571 }
2572 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2573
2574 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2575 {
2576         struct qeth_buffer_pool_entry *entry;
2577
2578         QETH_CARD_TEXT(card, 5, "inwrklst");
2579
2580         list_for_each_entry(entry,
2581                             &card->qdio.init_pool.entry_list, init_list) {
2582                 qeth_put_buffer_pool_entry(card, entry);
2583         }
2584 }
2585
2586 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2587                                         struct qeth_card *card)
2588 {
2589         struct list_head *plh;
2590         struct qeth_buffer_pool_entry *entry;
2591         int i, free;
2592         struct page *page;
2593
2594         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2595                 return NULL;
2596
2597         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2598                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2599                 free = 1;
2600                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2601                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2602                                 free = 0;
2603                                 break;
2604                         }
2605                 }
2606                 if (free) {
2607                         list_del_init(&entry->list);
2608                         return entry;
2609                 }
2610         }
2611
2612         /* no free buffer in pool so take first one and swap pages */
2613         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2614                         struct qeth_buffer_pool_entry, list);
2615         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2616                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2617                         page = alloc_page(GFP_ATOMIC);
2618                         if (!page) {
2619                                 return NULL;
2620                         } else {
2621                                 free_page((unsigned long)entry->elements[i]);
2622                                 entry->elements[i] = page_address(page);
2623                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2624                         }
2625                 }
2626         }
2627         list_del_init(&entry->list);
2628         return entry;
2629 }
2630
2631 static int qeth_init_input_buffer(struct qeth_card *card,
2632                 struct qeth_qdio_buffer *buf)
2633 {
2634         struct qeth_buffer_pool_entry *pool_entry;
2635         int i;
2636
2637         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2638                 buf->rx_skb = netdev_alloc_skb(card->dev,
2639                                                QETH_RX_PULL_LEN + ETH_HLEN);
2640                 if (!buf->rx_skb)
2641                         return 1;
2642         }
2643
2644         pool_entry = qeth_find_free_buffer_pool_entry(card);
2645         if (!pool_entry)
2646                 return 1;
2647
2648         /*
2649          * since the buffer is accessed only from the input_tasklet
2650          * there shouldn't be a need to synchronize; also, since we use
2651          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2652          * buffers
2653          */
2654
2655         buf->pool_entry = pool_entry;
2656         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2657                 buf->buffer->element[i].length = PAGE_SIZE;
2658                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2659                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2660                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2661                 else
2662                         buf->buffer->element[i].eflags = 0;
2663                 buf->buffer->element[i].sflags = 0;
2664         }
2665         return 0;
2666 }
2667
2668 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2669                                             struct qeth_qdio_out_q *queue)
2670 {
2671         if (!IS_IQD(card) ||
2672             qeth_iqd_is_mcast_queue(card, queue) ||
2673             card->options.cq == QETH_CQ_ENABLED ||
2674             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2675                 return 1;
2676
2677         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2678 }
2679
2680 int qeth_init_qdio_queues(struct qeth_card *card)
2681 {
2682         unsigned int i;
2683         int rc;
2684
2685         QETH_CARD_TEXT(card, 2, "initqdqs");
2686
2687         /* inbound queue */
2688         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2689         memset(&card->rx, 0, sizeof(struct qeth_rx));
2690         qeth_initialize_working_pool_list(card);
2691         /*give only as many buffers to hardware as we have buffer pool entries*/
2692         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2693                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2694         card->qdio.in_q->next_buf_to_init =
2695                 card->qdio.in_buf_pool.buf_count - 1;
2696         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2697                      card->qdio.in_buf_pool.buf_count - 1);
2698         if (rc) {
2699                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2700                 return rc;
2701         }
2702
2703         /* completion */
2704         rc = qeth_cq_init(card);
2705         if (rc) {
2706                 return rc;
2707         }
2708
2709         /* outbound queue */
2710         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2711                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2712
2713                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2714                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2715                 queue->next_buf_to_fill = 0;
2716                 queue->do_pack = 0;
2717                 queue->prev_hdr = NULL;
2718                 queue->bulk_start = 0;
2719                 queue->bulk_count = 0;
2720                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2721                 atomic_set(&queue->used_buffers, 0);
2722                 atomic_set(&queue->set_pci_flags_count, 0);
2723                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2724                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2725         }
2726         return 0;
2727 }
2728 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2729
2730 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2731                                   struct qeth_cmd_buffer *iob)
2732 {
2733         qeth_mpc_finalize_cmd(card, iob);
2734
2735         /* override with IPA-specific values: */
2736         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2737 }
2738
2739 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2740                           u16 cmd_length)
2741 {
2742         u8 prot_type = qeth_mpc_select_prot_type(card);
2743         u16 total_length = iob->length;
2744
2745         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2746                        iob->data);
2747         iob->finalize = qeth_ipa_finalize_cmd;
2748
2749         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2750         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2751         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2752         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2753         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2754         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2755                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2756         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2757 }
2758 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2759
2760 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2761                                            enum qeth_ipa_cmds cmd_code,
2762                                            enum qeth_prot_versions prot,
2763                                            unsigned int data_length)
2764 {
2765         enum qeth_link_types link_type = card->info.link_type;
2766         struct qeth_cmd_buffer *iob;
2767         struct qeth_ipacmd_hdr *hdr;
2768
2769         data_length += offsetof(struct qeth_ipa_cmd, data);
2770         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2771                              QETH_IPA_TIMEOUT);
2772         if (!iob)
2773                 return NULL;
2774
2775         qeth_prepare_ipa_cmd(card, iob, data_length);
2776
2777         hdr = &__ipa_cmd(iob)->hdr;
2778         hdr->command = cmd_code;
2779         hdr->initiator = IPA_CMD_INITIATOR_HOST;
2780         /* hdr->seqno is set by qeth_send_control_data() */
2781         hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2782         hdr->rel_adapter_no = (u8) card->dev->dev_port;
2783         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2784         hdr->param_count = 1;
2785         hdr->prot_version = prot;
2786         return iob;
2787 }
2788 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2789
2790 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2791                                 struct qeth_reply *reply, unsigned long data)
2792 {
2793         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2794
2795         return (cmd->hdr.return_code) ? -EIO : 0;
2796 }
2797
2798 /**
2799  * qeth_send_ipa_cmd() - send an IPA command
2800  *
2801  * See qeth_send_control_data() for explanation of the arguments.
2802  */
2803
2804 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2805                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2806                         unsigned long),
2807                 void *reply_param)
2808 {
2809         int rc;
2810
2811         QETH_CARD_TEXT(card, 4, "sendipa");
2812
2813         if (card->read_or_write_problem) {
2814                 qeth_put_cmd(iob);
2815                 return -EIO;
2816         }
2817
2818         if (reply_cb == NULL)
2819                 reply_cb = qeth_send_ipa_cmd_cb;
2820         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2821         if (rc == -ETIME) {
2822                 qeth_clear_ipacmd_list(card);
2823                 qeth_schedule_recovery(card);
2824         }
2825         return rc;
2826 }
2827 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2828
2829 static int qeth_send_startlan_cb(struct qeth_card *card,
2830                                  struct qeth_reply *reply, unsigned long data)
2831 {
2832         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2833
2834         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2835                 return -ENETDOWN;
2836
2837         return (cmd->hdr.return_code) ? -EIO : 0;
2838 }
2839
2840 static int qeth_send_startlan(struct qeth_card *card)
2841 {
2842         struct qeth_cmd_buffer *iob;
2843
2844         QETH_CARD_TEXT(card, 2, "strtlan");
2845
2846         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2847         if (!iob)
2848                 return -ENOMEM;
2849         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2850 }
2851
2852 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2853 {
2854         if (!cmd->hdr.return_code)
2855                 cmd->hdr.return_code =
2856                         cmd->data.setadapterparms.hdr.return_code;
2857         return cmd->hdr.return_code;
2858 }
2859
2860 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2861                 struct qeth_reply *reply, unsigned long data)
2862 {
2863         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2864
2865         QETH_CARD_TEXT(card, 3, "quyadpcb");
2866         if (qeth_setadpparms_inspect_rc(cmd))
2867                 return -EIO;
2868
2869         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2870                 card->info.link_type =
2871                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2872                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2873         }
2874         card->options.adp.supported_funcs =
2875                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2876         return 0;
2877 }
2878
2879 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2880                                                     enum qeth_ipa_setadp_cmd adp_cmd,
2881                                                     unsigned int data_length)
2882 {
2883         struct qeth_ipacmd_setadpparms_hdr *hdr;
2884         struct qeth_cmd_buffer *iob;
2885
2886         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2887                                  data_length +
2888                                  offsetof(struct qeth_ipacmd_setadpparms,
2889                                           data));
2890         if (!iob)
2891                 return NULL;
2892
2893         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2894         hdr->cmdlength = sizeof(*hdr) + data_length;
2895         hdr->command_code = adp_cmd;
2896         hdr->used_total = 1;
2897         hdr->seq_no = 1;
2898         return iob;
2899 }
2900
2901 static int qeth_query_setadapterparms(struct qeth_card *card)
2902 {
2903         int rc;
2904         struct qeth_cmd_buffer *iob;
2905
2906         QETH_CARD_TEXT(card, 3, "queryadp");
2907         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2908                                    SETADP_DATA_SIZEOF(query_cmds_supp));
2909         if (!iob)
2910                 return -ENOMEM;
2911         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2912         return rc;
2913 }
2914
2915 static int qeth_query_ipassists_cb(struct qeth_card *card,
2916                 struct qeth_reply *reply, unsigned long data)
2917 {
2918         struct qeth_ipa_cmd *cmd;
2919
2920         QETH_CARD_TEXT(card, 2, "qipasscb");
2921
2922         cmd = (struct qeth_ipa_cmd *) data;
2923
2924         switch (cmd->hdr.return_code) {
2925         case IPA_RC_SUCCESS:
2926                 break;
2927         case IPA_RC_NOTSUPP:
2928         case IPA_RC_L2_UNSUPPORTED_CMD:
2929                 QETH_CARD_TEXT(card, 2, "ipaunsup");
2930                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2931                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2932                 return -EOPNOTSUPP;
2933         default:
2934                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2935                                  CARD_DEVID(card), cmd->hdr.return_code);
2936                 return -EIO;
2937         }
2938
2939         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2940                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2941                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2942         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2943                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2944                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2945         } else
2946                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2947                                  CARD_DEVID(card));
2948         return 0;
2949 }
2950
2951 static int qeth_query_ipassists(struct qeth_card *card,
2952                                 enum qeth_prot_versions prot)
2953 {
2954         int rc;
2955         struct qeth_cmd_buffer *iob;
2956
2957         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2958         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2959         if (!iob)
2960                 return -ENOMEM;
2961         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2962         return rc;
2963 }
2964
2965 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2966                                 struct qeth_reply *reply, unsigned long data)
2967 {
2968         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2969         struct qeth_query_switch_attributes *attrs;
2970         struct qeth_switch_info *sw_info;
2971
2972         QETH_CARD_TEXT(card, 2, "qswiatcb");
2973         if (qeth_setadpparms_inspect_rc(cmd))
2974                 return -EIO;
2975
2976         sw_info = (struct qeth_switch_info *)reply->param;
2977         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2978         sw_info->capabilities = attrs->capabilities;
2979         sw_info->settings = attrs->settings;
2980         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2981                         sw_info->settings);
2982         return 0;
2983 }
2984
2985 int qeth_query_switch_attributes(struct qeth_card *card,
2986                                  struct qeth_switch_info *sw_info)
2987 {
2988         struct qeth_cmd_buffer *iob;
2989
2990         QETH_CARD_TEXT(card, 2, "qswiattr");
2991         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2992                 return -EOPNOTSUPP;
2993         if (!netif_carrier_ok(card->dev))
2994                 return -ENOMEDIUM;
2995         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2996         if (!iob)
2997                 return -ENOMEM;
2998         return qeth_send_ipa_cmd(card, iob,
2999                                 qeth_query_switch_attributes_cb, sw_info);
3000 }
3001
3002 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3003                                           enum qeth_diags_cmds sub_cmd,
3004                                           unsigned int data_length)
3005 {
3006         struct qeth_ipacmd_diagass *cmd;
3007         struct qeth_cmd_buffer *iob;
3008
3009         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3010                                  DIAG_HDR_LEN + data_length);
3011         if (!iob)
3012                 return NULL;
3013
3014         cmd = &__ipa_cmd(iob)->data.diagass;
3015         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3016         cmd->subcmd = sub_cmd;
3017         return iob;
3018 }
3019 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3020
3021 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3022                 struct qeth_reply *reply, unsigned long data)
3023 {
3024         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3025         u16 rc = cmd->hdr.return_code;
3026
3027         if (rc) {
3028                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3029                 return -EIO;
3030         }
3031
3032         card->info.diagass_support = cmd->data.diagass.ext;
3033         return 0;
3034 }
3035
3036 static int qeth_query_setdiagass(struct qeth_card *card)
3037 {
3038         struct qeth_cmd_buffer *iob;
3039
3040         QETH_CARD_TEXT(card, 2, "qdiagass");
3041         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3042         if (!iob)
3043                 return -ENOMEM;
3044         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3045 }
3046
3047 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3048 {
3049         unsigned long info = get_zeroed_page(GFP_KERNEL);
3050         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3051         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3052         struct ccw_dev_id ccwid;
3053         int level;
3054
3055         tid->chpid = card->info.chpid;
3056         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3057         tid->ssid = ccwid.ssid;
3058         tid->devno = ccwid.devno;
3059         if (!info)
3060                 return;
3061         level = stsi(NULL, 0, 0, 0);
3062         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3063                 tid->lparnr = info222->lpar_number;
3064         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3065                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3066                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3067         }
3068         free_page(info);
3069         return;
3070 }
3071
3072 static int qeth_hw_trap_cb(struct qeth_card *card,
3073                 struct qeth_reply *reply, unsigned long data)
3074 {
3075         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3076         u16 rc = cmd->hdr.return_code;
3077
3078         if (rc) {
3079                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3080                 return -EIO;
3081         }
3082         return 0;
3083 }
3084
3085 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3086 {
3087         struct qeth_cmd_buffer *iob;
3088         struct qeth_ipa_cmd *cmd;
3089
3090         QETH_CARD_TEXT(card, 2, "diagtrap");
3091         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3092         if (!iob)
3093                 return -ENOMEM;
3094         cmd = __ipa_cmd(iob);
3095         cmd->data.diagass.type = 1;
3096         cmd->data.diagass.action = action;
3097         switch (action) {
3098         case QETH_DIAGS_TRAP_ARM:
3099                 cmd->data.diagass.options = 0x0003;
3100                 cmd->data.diagass.ext = 0x00010000 +
3101                         sizeof(struct qeth_trap_id);
3102                 qeth_get_trap_id(card,
3103                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3104                 break;
3105         case QETH_DIAGS_TRAP_DISARM:
3106                 cmd->data.diagass.options = 0x0001;
3107                 break;
3108         case QETH_DIAGS_TRAP_CAPTURE:
3109                 break;
3110         }
3111         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3112 }
3113 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3114
3115 static int qeth_check_qdio_errors(struct qeth_card *card,
3116                                   struct qdio_buffer *buf,
3117                                   unsigned int qdio_error,
3118                                   const char *dbftext)
3119 {
3120         if (qdio_error) {
3121                 QETH_CARD_TEXT(card, 2, dbftext);
3122                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3123                                buf->element[15].sflags);
3124                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3125                                buf->element[14].sflags);
3126                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3127                 if ((buf->element[15].sflags) == 0x12) {
3128                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3129                         return 0;
3130                 } else
3131                         return 1;
3132         }
3133         return 0;
3134 }
3135
3136 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3137 {
3138         struct qeth_qdio_q *queue = card->qdio.in_q;
3139         struct list_head *lh;
3140         int count;
3141         int i;
3142         int rc;
3143         int newcount = 0;
3144
3145         count = (index < queue->next_buf_to_init)?
3146                 card->qdio.in_buf_pool.buf_count -
3147                 (queue->next_buf_to_init - index) :
3148                 card->qdio.in_buf_pool.buf_count -
3149                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3150         /* only requeue at a certain threshold to avoid SIGAs */
3151         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3152                 for (i = queue->next_buf_to_init;
3153                      i < queue->next_buf_to_init + count; ++i) {
3154                         if (qeth_init_input_buffer(card,
3155                                 &queue->bufs[QDIO_BUFNR(i)])) {
3156                                 break;
3157                         } else {
3158                                 newcount++;
3159                         }
3160                 }
3161
3162                 if (newcount < count) {
3163                         /* we are in memory shortage so we switch back to
3164                            traditional skb allocation and drop packages */
3165                         atomic_set(&card->force_alloc_skb, 3);
3166                         count = newcount;
3167                 } else {
3168                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3169                 }
3170
3171                 if (!count) {
3172                         i = 0;
3173                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3174                                 i++;
3175                         if (i == card->qdio.in_buf_pool.buf_count) {
3176                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3177                                 card->reclaim_index = index;
3178                                 schedule_delayed_work(
3179                                         &card->buffer_reclaim_work,
3180                                         QETH_RECLAIM_WORK_TIME);
3181                         }
3182                         return;
3183                 }
3184
3185                 /*
3186                  * according to old code it should be avoided to requeue all
3187                  * 128 buffers in order to benefit from PCI avoidance.
3188                  * this function keeps at least one buffer (the buffer at
3189                  * 'index') un-requeued -> this buffer is the first buffer that
3190                  * will be requeued the next time
3191                  */
3192                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3193                              queue->next_buf_to_init, count);
3194                 if (rc) {
3195                         QETH_CARD_TEXT(card, 2, "qinberr");
3196                 }
3197                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3198                                                      count);
3199         }
3200 }
3201
3202 static void qeth_buffer_reclaim_work(struct work_struct *work)
3203 {
3204         struct qeth_card *card = container_of(work, struct qeth_card,
3205                 buffer_reclaim_work.work);
3206
3207         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3208         qeth_queue_input_buffer(card, card->reclaim_index);
3209 }
3210
3211 static void qeth_handle_send_error(struct qeth_card *card,
3212                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3213 {
3214         int sbalf15 = buffer->buffer->element[15].sflags;
3215
3216         QETH_CARD_TEXT(card, 6, "hdsnderr");
3217         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3218
3219         if (!qdio_err)
3220                 return;
3221
3222         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3223                 return;
3224
3225         QETH_CARD_TEXT(card, 1, "lnkfail");
3226         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3227                        (u16)qdio_err, (u8)sbalf15);
3228 }
3229
3230 /**
3231  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3232  * @queue: queue to check for packing buffer
3233  *
3234  * Returns number of buffers that were prepared for flush.
3235  */
3236 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3237 {
3238         struct qeth_qdio_out_buffer *buffer;
3239
3240         buffer = queue->bufs[queue->next_buf_to_fill];
3241         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3242             (buffer->next_element_to_fill > 0)) {
3243                 /* it's a packing buffer */
3244                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3245                 queue->next_buf_to_fill =
3246                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3247                 return 1;
3248         }
3249         return 0;
3250 }
3251
3252 /*
3253  * Switched to packing state if the number of used buffers on a queue
3254  * reaches a certain limit.
3255  */
3256 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3257 {
3258         if (!queue->do_pack) {
3259                 if (atomic_read(&queue->used_buffers)
3260                     >= QETH_HIGH_WATERMARK_PACK){
3261                         /* switch non-PACKING -> PACKING */
3262                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3263                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3264                         queue->do_pack = 1;
3265                 }
3266         }
3267 }
3268
3269 /*
3270  * Switches from packing to non-packing mode. If there is a packing
3271  * buffer on the queue this buffer will be prepared to be flushed.
3272  * In that case 1 is returned to inform the caller. If no buffer
3273  * has to be flushed, zero is returned.
3274  */
3275 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3276 {
3277         if (queue->do_pack) {
3278                 if (atomic_read(&queue->used_buffers)
3279                     <= QETH_LOW_WATERMARK_PACK) {
3280                         /* switch PACKING -> non-PACKING */
3281                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3282                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3283                         queue->do_pack = 0;
3284                         return qeth_prep_flush_pack_buffer(queue);
3285                 }
3286         }
3287         return 0;
3288 }
3289
3290 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3291                                int count)
3292 {
3293         struct qeth_card *card = queue->card;
3294         struct qeth_qdio_out_buffer *buf;
3295         int rc;
3296         int i;
3297         unsigned int qdio_flags;
3298
3299         for (i = index; i < index + count; ++i) {
3300                 unsigned int bidx = QDIO_BUFNR(i);
3301
3302                 buf = queue->bufs[bidx];
3303                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3304                                 SBAL_EFLAGS_LAST_ENTRY;
3305
3306                 if (queue->bufstates)
3307                         queue->bufstates[bidx].user = buf;
3308
3309                 if (IS_IQD(queue->card))
3310                         continue;
3311
3312                 if (!queue->do_pack) {
3313                         if ((atomic_read(&queue->used_buffers) >=
3314                                 (QETH_HIGH_WATERMARK_PACK -
3315                                  QETH_WATERMARK_PACK_FUZZ)) &&
3316                             !atomic_read(&queue->set_pci_flags_count)) {
3317                                 /* it's likely that we'll go to packing
3318                                  * mode soon */
3319                                 atomic_inc(&queue->set_pci_flags_count);
3320                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3321                         }
3322                 } else {
3323                         if (!atomic_read(&queue->set_pci_flags_count)) {
3324                                 /*
3325                                  * there's no outstanding PCI any more, so we
3326                                  * have to request a PCI to be sure the the PCI
3327                                  * will wake at some time in the future then we
3328                                  * can flush packed buffers that might still be
3329                                  * hanging around, which can happen if no
3330                                  * further send was requested by the stack
3331                                  */
3332                                 atomic_inc(&queue->set_pci_flags_count);
3333                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3334                         }
3335                 }
3336         }
3337
3338         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3339         if (atomic_read(&queue->set_pci_flags_count))
3340                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3341         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3342                      queue->queue_no, index, count);
3343
3344         /* Fake the TX completion interrupt: */
3345         if (IS_IQD(card))
3346                 napi_schedule(&queue->napi);
3347
3348         if (rc) {
3349                 /* ignore temporary SIGA errors without busy condition */
3350                 if (rc == -ENOBUFS)
3351                         return;
3352                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3353                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3354                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3355                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3356                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3357
3358                 /* this must not happen under normal circumstances. if it
3359                  * happens something is really wrong -> recover */
3360                 qeth_schedule_recovery(queue->card);
3361                 return;
3362         }
3363 }
3364
3365 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3366 {
3367         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3368
3369         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3370         queue->prev_hdr = NULL;
3371         queue->bulk_count = 0;
3372 }
3373
3374 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3375 {
3376         int index;
3377         int flush_cnt = 0;
3378         int q_was_packing = 0;
3379
3380         /*
3381          * check if weed have to switch to non-packing mode or if
3382          * we have to get a pci flag out on the queue
3383          */
3384         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3385             !atomic_read(&queue->set_pci_flags_count)) {
3386                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3387                                 QETH_OUT_Q_UNLOCKED) {
3388                         /*
3389                          * If we get in here, there was no action in
3390                          * do_send_packet. So, we check if there is a
3391                          * packing buffer to be flushed here.
3392                          */
3393                         index = queue->next_buf_to_fill;
3394                         q_was_packing = queue->do_pack;
3395                         /* queue->do_pack may change */
3396                         barrier();
3397                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3398                         if (!flush_cnt &&
3399                             !atomic_read(&queue->set_pci_flags_count))
3400                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3401                         if (q_was_packing)
3402                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3403                         if (flush_cnt)
3404                                 qeth_flush_buffers(queue, index, flush_cnt);
3405                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3406                 }
3407         }
3408 }
3409
3410 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3411                                  unsigned long card_ptr)
3412 {
3413         struct qeth_card *card = (struct qeth_card *)card_ptr;
3414
3415         if (card->dev->flags & IFF_UP)
3416                 napi_schedule(&card->napi);
3417 }
3418
3419 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3420 {
3421         int rc;
3422
3423         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3424                 rc = -1;
3425                 goto out;
3426         } else {
3427                 if (card->options.cq == cq) {
3428                         rc = 0;
3429                         goto out;
3430                 }
3431
3432                 if (card->state != CARD_STATE_DOWN) {
3433                         rc = -1;
3434                         goto out;
3435                 }
3436
3437                 qeth_free_qdio_queues(card);
3438                 card->options.cq = cq;
3439                 rc = 0;
3440         }
3441 out:
3442         return rc;
3443
3444 }
3445 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3446
3447 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3448                                  unsigned int queue, int first_element,
3449                                  int count)
3450 {
3451         struct qeth_qdio_q *cq = card->qdio.c_q;
3452         int i;
3453         int rc;
3454
3455         if (!qeth_is_cq(card, queue))
3456                 return;
3457
3458         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3459         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3460         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3461
3462         if (qdio_err) {
3463                 netif_tx_stop_all_queues(card->dev);
3464                 qeth_schedule_recovery(card);
3465                 return;
3466         }
3467
3468         for (i = first_element; i < first_element + count; ++i) {
3469                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3470                 int e = 0;
3471
3472                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3473                        buffer->element[e].addr) {
3474                         unsigned long phys_aob_addr;
3475
3476                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3477                         qeth_qdio_handle_aob(card, phys_aob_addr);
3478                         ++e;
3479                 }
3480                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3481         }
3482         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3483                     card->qdio.c_q->next_buf_to_init,
3484                     count);
3485         if (rc) {
3486                 dev_warn(&card->gdev->dev,
3487                         "QDIO reported an error, rc=%i\n", rc);
3488                 QETH_CARD_TEXT(card, 2, "qcqherr");
3489         }
3490
3491         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3492 }
3493
3494 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3495                                     unsigned int qdio_err, int queue,
3496                                     int first_elem, int count,
3497                                     unsigned long card_ptr)
3498 {
3499         struct qeth_card *card = (struct qeth_card *)card_ptr;
3500
3501         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3502         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3503
3504         if (qeth_is_cq(card, queue))
3505                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3506         else if (qdio_err)
3507                 qeth_schedule_recovery(card);
3508 }
3509
3510 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3511                                      unsigned int qdio_error, int __queue,
3512                                      int first_element, int count,
3513                                      unsigned long card_ptr)
3514 {
3515         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3516         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3517         struct net_device *dev = card->dev;
3518         struct netdev_queue *txq;
3519         int i;
3520
3521         QETH_CARD_TEXT(card, 6, "qdouhdl");
3522         if (qdio_error & QDIO_ERROR_FATAL) {
3523                 QETH_CARD_TEXT(card, 2, "achkcond");
3524                 netif_tx_stop_all_queues(dev);
3525                 qeth_schedule_recovery(card);
3526                 return;
3527         }
3528
3529         for (i = first_element; i < (first_element + count); ++i) {
3530                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3531
3532                 qeth_handle_send_error(card, buf, qdio_error);
3533                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3534         }
3535
3536         atomic_sub(count, &queue->used_buffers);
3537         qeth_check_outbound_queue(queue);
3538
3539         txq = netdev_get_tx_queue(dev, __queue);
3540         /* xmit may have observed the full-condition, but not yet stopped the
3541          * txq. In which case the code below won't trigger. So before returning,
3542          * xmit will re-check the txq's fill level and wake it up if needed.
3543          */
3544         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3545                 netif_tx_wake_queue(txq);
3546 }
3547
3548 /**
3549  * Note: Function assumes that we have 4 outbound queues.
3550  */
3551 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3552 {
3553         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3554         u8 tos;
3555
3556         switch (card->qdio.do_prio_queueing) {
3557         case QETH_PRIO_Q_ING_TOS:
3558         case QETH_PRIO_Q_ING_PREC:
3559                 switch (qeth_get_ip_version(skb)) {
3560                 case 4:
3561                         tos = ipv4_get_dsfield(ip_hdr(skb));
3562                         break;
3563                 case 6:
3564                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3565                         break;
3566                 default:
3567                         return card->qdio.default_out_queue;
3568                 }
3569                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3570                         return ~tos >> 6 & 3;
3571                 if (tos & IPTOS_MINCOST)
3572                         return 3;
3573                 if (tos & IPTOS_RELIABILITY)
3574                         return 2;
3575                 if (tos & IPTOS_THROUGHPUT)
3576                         return 1;
3577                 if (tos & IPTOS_LOWDELAY)
3578                         return 0;
3579                 break;
3580         case QETH_PRIO_Q_ING_SKB:
3581                 if (skb->priority > 5)
3582                         return 0;
3583                 return ~skb->priority >> 1 & 3;
3584         case QETH_PRIO_Q_ING_VLAN:
3585                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3586                         return ~ntohs(veth->h_vlan_TCI) >>
3587                                (VLAN_PRIO_SHIFT + 1) & 3;
3588                 break;
3589         default:
3590                 break;
3591         }
3592         return card->qdio.default_out_queue;
3593 }
3594 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3595
3596 /**
3597  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3598  * @skb:                                SKB address
3599  *
3600  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3601  * fragmented part of the SKB. Returns zero for linear SKB.
3602  */
3603 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3604 {
3605         int cnt, elements = 0;
3606
3607         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3608                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3609
3610                 elements += qeth_get_elements_for_range(
3611                         (addr_t)skb_frag_address(frag),
3612                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3613         }
3614         return elements;
3615 }
3616
3617 /**
3618  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3619  *                              to transmit an skb.
3620  * @skb:                        the skb to operate on.
3621  * @data_offset:                skip this part of the skb's linear data
3622  *
3623  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3624  * skb's data (both its linear part and paged fragments).
3625  */
3626 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3627 {
3628         unsigned int elements = qeth_get_elements_for_frags(skb);
3629         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3630         addr_t start = (addr_t)skb->data + data_offset;
3631
3632         if (start != end)
3633                 elements += qeth_get_elements_for_range(start, end);
3634         return elements;
3635 }
3636 EXPORT_SYMBOL_GPL(qeth_count_elements);
3637
3638 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3639                                          MAX_TCP_HEADER)
3640
3641 /**
3642  * qeth_add_hw_header() - add a HW header to an skb.
3643  * @skb: skb that the HW header should be added to.
3644  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3645  *       it contains a valid pointer to a qeth_hdr.
3646  * @hdr_len: length of the HW header.
3647  * @proto_len: length of protocol headers that need to be in same page as the
3648  *             HW header.
3649  *
3650  * Returns the pushed length. If the header can't be pushed on
3651  * (eg. because it would cross a page boundary), it is allocated from
3652  * the cache instead and 0 is returned.
3653  * The number of needed buffer elements is returned in @elements.
3654  * Error to create the hdr is indicated by returning with < 0.
3655  */
3656 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3657                               struct sk_buff *skb, struct qeth_hdr **hdr,
3658                               unsigned int hdr_len, unsigned int proto_len,
3659                               unsigned int *elements)
3660 {
3661         const unsigned int contiguous = proto_len ? proto_len : 1;
3662         const unsigned int max_elements = queue->max_elements;
3663         unsigned int __elements;
3664         addr_t start, end;
3665         bool push_ok;
3666         int rc;
3667
3668 check_layout:
3669         start = (addr_t)skb->data - hdr_len;
3670         end = (addr_t)skb->data;
3671
3672         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3673                 /* Push HW header into same page as first protocol header. */
3674                 push_ok = true;
3675                 /* ... but TSO always needs a separate element for headers: */
3676                 if (skb_is_gso(skb))
3677                         __elements = 1 + qeth_count_elements(skb, proto_len);
3678                 else
3679                         __elements = qeth_count_elements(skb, 0);
3680         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3681                 /* Push HW header into preceding page, flush with skb->data. */
3682                 push_ok = true;
3683                 __elements = 1 + qeth_count_elements(skb, 0);
3684         } else {
3685                 /* Use header cache, copy protocol headers up. */
3686                 push_ok = false;
3687                 __elements = 1 + qeth_count_elements(skb, proto_len);
3688         }
3689
3690         /* Compress skb to fit into one IO buffer: */
3691         if (__elements > max_elements) {
3692                 if (!skb_is_nonlinear(skb)) {
3693                         /* Drop it, no easy way of shrinking it further. */
3694                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3695                                          max_elements, __elements, skb->len);
3696                         return -E2BIG;
3697                 }
3698
3699                 rc = skb_linearize(skb);
3700                 if (rc) {
3701                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3702                         return rc;
3703                 }
3704
3705                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3706                 /* Linearization changed the layout, re-evaluate: */
3707                 goto check_layout;
3708         }
3709
3710         *elements = __elements;
3711         /* Add the header: */
3712         if (push_ok) {
3713                 *hdr = skb_push(skb, hdr_len);
3714                 return hdr_len;
3715         }
3716         /* fall back */
3717         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3718                 return -E2BIG;
3719         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3720         if (!*hdr)
3721                 return -ENOMEM;
3722         /* Copy protocol headers behind HW header: */
3723         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3724         return 0;
3725 }
3726
3727 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3728                               struct sk_buff *curr_skb,
3729                               struct qeth_hdr *curr_hdr)
3730 {
3731         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3732         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3733
3734         if (!prev_hdr)
3735                 return true;
3736
3737         /* All packets must have the same target: */
3738         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3739                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3740
3741                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3742                                         eth_hdr(curr_skb)->h_dest) &&
3743                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3744         }
3745
3746         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3747                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3748 }
3749
3750 static unsigned int __qeth_fill_buffer(struct sk_buff *skb,
3751                                        struct qeth_qdio_out_buffer *buf,
3752                                        bool is_first_elem, unsigned int offset)
3753 {
3754         struct qdio_buffer *buffer = buf->buffer;
3755         int element = buf->next_element_to_fill;
3756         int length = skb_headlen(skb) - offset;
3757         char *data = skb->data + offset;
3758         unsigned int elem_length, cnt;
3759
3760         /* map linear part into buffer element(s) */
3761         while (length > 0) {
3762                 elem_length = min_t(unsigned int, length,
3763                                     PAGE_SIZE - offset_in_page(data));
3764
3765                 buffer->element[element].addr = data;
3766                 buffer->element[element].length = elem_length;
3767                 length -= elem_length;
3768                 if (is_first_elem) {
3769                         is_first_elem = false;
3770                         if (length || skb_is_nonlinear(skb))
3771                                 /* skb needs additional elements */
3772                                 buffer->element[element].eflags =
3773                                         SBAL_EFLAGS_FIRST_FRAG;
3774                         else
3775                                 buffer->element[element].eflags = 0;
3776                 } else {
3777                         buffer->element[element].eflags =
3778                                 SBAL_EFLAGS_MIDDLE_FRAG;
3779                 }
3780
3781                 data += elem_length;
3782                 element++;
3783         }
3784
3785         /* map page frags into buffer element(s) */
3786         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3787                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3788
3789                 data = skb_frag_address(frag);
3790                 length = skb_frag_size(frag);
3791                 while (length > 0) {
3792                         elem_length = min_t(unsigned int, length,
3793                                             PAGE_SIZE - offset_in_page(data));
3794
3795                         buffer->element[element].addr = data;
3796                         buffer->element[element].length = elem_length;
3797                         buffer->element[element].eflags =
3798                                 SBAL_EFLAGS_MIDDLE_FRAG;
3799
3800                         length -= elem_length;
3801                         data += elem_length;
3802                         element++;
3803                 }
3804         }
3805
3806         if (buffer->element[element - 1].eflags)
3807                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3808         buf->next_element_to_fill = element;
3809         return element;
3810 }
3811
3812 /**
3813  * qeth_fill_buffer() - map skb into an output buffer
3814  * @buf:        buffer to transport the skb
3815  * @skb:        skb to map into the buffer
3816  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3817  *              from qeth_core_header_cache.
3818  * @offset:     when mapping the skb, start at skb->data + offset
3819  * @hd_len:     if > 0, build a dedicated header element of this size
3820  */
3821 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3822                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3823                                      unsigned int offset, unsigned int hd_len)
3824 {
3825         struct qdio_buffer *buffer = buf->buffer;
3826         bool is_first_elem = true;
3827
3828         __skb_queue_tail(&buf->skb_list, skb);
3829
3830         /* build dedicated header element */
3831         if (hd_len) {
3832                 int element = buf->next_element_to_fill;
3833                 is_first_elem = false;
3834
3835                 buffer->element[element].addr = hdr;
3836                 buffer->element[element].length = hd_len;
3837                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3838                 /* remember to free cache-allocated qeth_hdr: */
3839                 buf->is_header[element] = ((void *)hdr != skb->data);
3840                 buf->next_element_to_fill++;
3841         }
3842
3843         return __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3844 }
3845
3846 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3847                        struct sk_buff *skb, unsigned int elements,
3848                        struct qeth_hdr *hdr, unsigned int offset,
3849                        unsigned int hd_len)
3850 {
3851         unsigned int bytes = qdisc_pkt_len(skb);
3852         struct qeth_qdio_out_buffer *buffer;
3853         unsigned int next_element;
3854         struct netdev_queue *txq;
3855         bool stopped = false;
3856         bool flush;
3857
3858         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
3859         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3860
3861         /* Just a sanity check, the wake/stop logic should ensure that we always
3862          * get a free buffer.
3863          */
3864         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3865                 return -EBUSY;
3866
3867         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
3868
3869         if (flush ||
3870             (buffer->next_element_to_fill + elements > queue->max_elements)) {
3871                 if (buffer->next_element_to_fill > 0) {
3872                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3873                         queue->bulk_count++;
3874                 }
3875
3876                 if (queue->bulk_count >= queue->bulk_max)
3877                         flush = true;
3878
3879                 if (flush)
3880                         qeth_flush_queue(queue);
3881
3882                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
3883                                                 queue->bulk_count)];
3884
3885                 /* Sanity-check again: */
3886                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3887                         return -EBUSY;
3888         }
3889
3890         if (buffer->next_element_to_fill == 0 &&
3891             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3892                 /* If a TX completion happens right _here_ and misses to wake
3893                  * the txq, then our re-check below will catch the race.
3894                  */
3895                 QETH_TXQ_STAT_INC(queue, stopped);
3896                 netif_tx_stop_queue(txq);
3897                 stopped = true;
3898         }
3899
3900         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3901         buffer->bytes += bytes;
3902         queue->prev_hdr = hdr;
3903
3904         flush = __netdev_tx_sent_queue(txq, bytes,
3905                                        !stopped && netdev_xmit_more());
3906
3907         if (flush || next_element >= queue->max_elements) {
3908                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3909                 queue->bulk_count++;
3910
3911                 if (queue->bulk_count >= queue->bulk_max)
3912                         flush = true;
3913
3914                 if (flush)
3915                         qeth_flush_queue(queue);
3916         }
3917
3918         if (stopped && !qeth_out_queue_is_full(queue))
3919                 netif_tx_start_queue(txq);
3920         return 0;
3921 }
3922
3923 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3924                         struct sk_buff *skb, struct qeth_hdr *hdr,
3925                         unsigned int offset, unsigned int hd_len,
3926                         int elements_needed)
3927 {
3928         struct qeth_qdio_out_buffer *buffer;
3929         unsigned int next_element;
3930         struct netdev_queue *txq;
3931         bool stopped = false;
3932         int start_index;
3933         int flush_count = 0;
3934         int do_pack = 0;
3935         int tmp;
3936         int rc = 0;
3937
3938         /* spin until we get the queue ... */
3939         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3940                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3941         start_index = queue->next_buf_to_fill;
3942         buffer = queue->bufs[queue->next_buf_to_fill];
3943
3944         /* Just a sanity check, the wake/stop logic should ensure that we always
3945          * get a free buffer.
3946          */
3947         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3948                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3949                 return -EBUSY;
3950         }
3951
3952         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3953
3954         /* check if we need to switch packing state of this queue */
3955         qeth_switch_to_packing_if_needed(queue);
3956         if (queue->do_pack) {
3957                 do_pack = 1;
3958                 /* does packet fit in current buffer? */
3959                 if (buffer->next_element_to_fill + elements_needed >
3960                     queue->max_elements) {
3961                         /* ... no -> set state PRIMED */
3962                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3963                         flush_count++;
3964                         queue->next_buf_to_fill =
3965                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
3966                         buffer = queue->bufs[queue->next_buf_to_fill];
3967
3968                         /* We stepped forward, so sanity-check again: */
3969                         if (atomic_read(&buffer->state) !=
3970                             QETH_QDIO_BUF_EMPTY) {
3971                                 qeth_flush_buffers(queue, start_index,
3972                                                            flush_count);
3973                                 atomic_set(&queue->state,
3974                                                 QETH_OUT_Q_UNLOCKED);
3975                                 rc = -EBUSY;
3976                                 goto out;
3977                         }
3978                 }
3979         }
3980
3981         if (buffer->next_element_to_fill == 0 &&
3982             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3983                 /* If a TX completion happens right _here_ and misses to wake
3984                  * the txq, then our re-check below will catch the race.
3985                  */
3986                 QETH_TXQ_STAT_INC(queue, stopped);
3987                 netif_tx_stop_queue(txq);
3988                 stopped = true;
3989         }
3990
3991         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
3992
3993         if (queue->do_pack)
3994                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3995         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
3996                 flush_count++;
3997                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3998                 queue->next_buf_to_fill =
3999                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4000         }
4001
4002         if (flush_count)
4003                 qeth_flush_buffers(queue, start_index, flush_count);
4004         else if (!atomic_read(&queue->set_pci_flags_count))
4005                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4006         /*
4007          * queue->state will go from LOCKED -> UNLOCKED or from
4008          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4009          * (switch packing state or flush buffer to get another pci flag out).
4010          * In that case we will enter this loop
4011          */
4012         while (atomic_dec_return(&queue->state)) {
4013                 start_index = queue->next_buf_to_fill;
4014                 /* check if we can go back to non-packing state */
4015                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4016                 /*
4017                  * check if we need to flush a packing buffer to get a pci
4018                  * flag out on the queue
4019                  */
4020                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4021                         tmp = qeth_prep_flush_pack_buffer(queue);
4022                 if (tmp) {
4023                         qeth_flush_buffers(queue, start_index, tmp);
4024                         flush_count += tmp;
4025                 }
4026         }
4027 out:
4028         /* at this point the queue is UNLOCKED again */
4029         if (do_pack)
4030                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4031
4032         if (stopped && !qeth_out_queue_is_full(queue))
4033                 netif_tx_start_queue(txq);
4034         return rc;
4035 }
4036 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4037
4038 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4039                               unsigned int payload_len, struct sk_buff *skb,
4040                               unsigned int proto_len)
4041 {
4042         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4043
4044         ext->hdr_tot_len = sizeof(*ext);
4045         ext->imb_hdr_no = 1;
4046         ext->hdr_type = 1;
4047         ext->hdr_version = 1;
4048         ext->hdr_len = 28;
4049         ext->payload_len = payload_len;
4050         ext->mss = skb_shinfo(skb)->gso_size;
4051         ext->dg_hdr_len = proto_len;
4052 }
4053
4054 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4055               struct qeth_qdio_out_q *queue, int ipv,
4056               void (*fill_header)(struct qeth_qdio_out_q *queue,
4057                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4058                                   int ipv, unsigned int data_len))
4059 {
4060         unsigned int proto_len, hw_hdr_len;
4061         unsigned int frame_len = skb->len;
4062         bool is_tso = skb_is_gso(skb);
4063         unsigned int data_offset = 0;
4064         struct qeth_hdr *hdr = NULL;
4065         unsigned int hd_len = 0;
4066         unsigned int elements;
4067         int push_len, rc;
4068
4069         if (is_tso) {
4070                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4071                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4072         } else {
4073                 hw_hdr_len = sizeof(struct qeth_hdr);
4074                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4075         }
4076
4077         rc = skb_cow_head(skb, hw_hdr_len);
4078         if (rc)
4079                 return rc;
4080
4081         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4082                                       &elements);
4083         if (push_len < 0)
4084                 return push_len;
4085         if (is_tso || !push_len) {
4086                 /* HW header needs its own buffer element. */
4087                 hd_len = hw_hdr_len + proto_len;
4088                 data_offset = push_len + proto_len;
4089         }
4090         memset(hdr, 0, hw_hdr_len);
4091         fill_header(queue, hdr, skb, ipv, frame_len);
4092         if (is_tso)
4093                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4094                                   frame_len - proto_len, skb, proto_len);
4095
4096         if (IS_IQD(card)) {
4097                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4098                                  hd_len);
4099         } else {
4100                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4101                 skb_orphan(skb);
4102                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4103                                          hd_len, elements);
4104         }
4105
4106         if (rc && !push_len)
4107                 kmem_cache_free(qeth_core_header_cache, hdr);
4108
4109         return rc;
4110 }
4111 EXPORT_SYMBOL_GPL(qeth_xmit);
4112
4113 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4114                 struct qeth_reply *reply, unsigned long data)
4115 {
4116         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4117         struct qeth_ipacmd_setadpparms *setparms;
4118
4119         QETH_CARD_TEXT(card, 4, "prmadpcb");
4120
4121         setparms = &(cmd->data.setadapterparms);
4122         if (qeth_setadpparms_inspect_rc(cmd)) {
4123                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4124                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4125         }
4126         card->info.promisc_mode = setparms->data.mode;
4127         return (cmd->hdr.return_code) ? -EIO : 0;
4128 }
4129
4130 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4131 {
4132         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4133                                                     SET_PROMISC_MODE_OFF;
4134         struct qeth_cmd_buffer *iob;
4135         struct qeth_ipa_cmd *cmd;
4136
4137         QETH_CARD_TEXT(card, 4, "setprom");
4138         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4139
4140         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4141                                    SETADP_DATA_SIZEOF(mode));
4142         if (!iob)
4143                 return;
4144         cmd = __ipa_cmd(iob);
4145         cmd->data.setadapterparms.data.mode = mode;
4146         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4147 }
4148 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4149
4150 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4151                 struct qeth_reply *reply, unsigned long data)
4152 {
4153         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4154         struct qeth_ipacmd_setadpparms *adp_cmd;
4155
4156         QETH_CARD_TEXT(card, 4, "chgmaccb");
4157         if (qeth_setadpparms_inspect_rc(cmd))
4158                 return -EIO;
4159
4160         adp_cmd = &cmd->data.setadapterparms;
4161         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4162                 return -EADDRNOTAVAIL;
4163
4164         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4165             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4166                 return -EADDRNOTAVAIL;
4167
4168         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4169         return 0;
4170 }
4171
4172 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4173 {
4174         int rc;
4175         struct qeth_cmd_buffer *iob;
4176         struct qeth_ipa_cmd *cmd;
4177
4178         QETH_CARD_TEXT(card, 4, "chgmac");
4179
4180         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4181                                    SETADP_DATA_SIZEOF(change_addr));
4182         if (!iob)
4183                 return -ENOMEM;
4184         cmd = __ipa_cmd(iob);
4185         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4186         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4187         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4188                         card->dev->dev_addr);
4189         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4190                                NULL);
4191         return rc;
4192 }
4193 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4194
4195 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4196                 struct qeth_reply *reply, unsigned long data)
4197 {
4198         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4199         struct qeth_set_access_ctrl *access_ctrl_req;
4200         int fallback = *(int *)reply->param;
4201
4202         QETH_CARD_TEXT(card, 4, "setaccb");
4203         if (cmd->hdr.return_code)
4204                 return -EIO;
4205         qeth_setadpparms_inspect_rc(cmd);
4206
4207         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4208         QETH_CARD_TEXT_(card, 2, "rc=%d",
4209                         cmd->data.setadapterparms.hdr.return_code);
4210         if (cmd->data.setadapterparms.hdr.return_code !=
4211                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4212                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4213                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4214                                  cmd->data.setadapterparms.hdr.return_code);
4215         switch (cmd->data.setadapterparms.hdr.return_code) {
4216         case SET_ACCESS_CTRL_RC_SUCCESS:
4217                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4218                         dev_info(&card->gdev->dev,
4219                             "QDIO data connection isolation is deactivated\n");
4220                 } else {
4221                         dev_info(&card->gdev->dev,
4222                             "QDIO data connection isolation is activated\n");
4223                 }
4224                 break;
4225         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4226                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4227                                  CARD_DEVID(card));
4228                 if (fallback)
4229                         card->options.isolation = card->options.prev_isolation;
4230                 break;
4231         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4232                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4233                                  CARD_DEVID(card));
4234                 if (fallback)
4235                         card->options.isolation = card->options.prev_isolation;
4236                 break;
4237         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4238                 dev_err(&card->gdev->dev, "Adapter does not "
4239                         "support QDIO data connection isolation\n");
4240                 break;
4241         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4242                 dev_err(&card->gdev->dev,
4243                         "Adapter is dedicated. "
4244                         "QDIO data connection isolation not supported\n");
4245                 if (fallback)
4246                         card->options.isolation = card->options.prev_isolation;
4247                 break;
4248         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4249                 dev_err(&card->gdev->dev,
4250                         "TSO does not permit QDIO data connection isolation\n");
4251                 if (fallback)
4252                         card->options.isolation = card->options.prev_isolation;
4253                 break;
4254         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4255                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4256                         "support reflective relay mode\n");
4257                 if (fallback)
4258                         card->options.isolation = card->options.prev_isolation;
4259                 break;
4260         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4261                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4262                                         "enabled at the adjacent switch port");
4263                 if (fallback)
4264                         card->options.isolation = card->options.prev_isolation;
4265                 break;
4266         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4267                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4268                                         "at the adjacent switch failed\n");
4269                 break;
4270         default:
4271                 /* this should never happen */
4272                 if (fallback)
4273                         card->options.isolation = card->options.prev_isolation;
4274                 break;
4275         }
4276         return (cmd->hdr.return_code) ? -EIO : 0;
4277 }
4278
4279 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4280                 enum qeth_ipa_isolation_modes isolation, int fallback)
4281 {
4282         int rc;
4283         struct qeth_cmd_buffer *iob;
4284         struct qeth_ipa_cmd *cmd;
4285         struct qeth_set_access_ctrl *access_ctrl_req;
4286
4287         QETH_CARD_TEXT(card, 4, "setacctl");
4288
4289         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4290                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4291         if (!iob)
4292                 return -ENOMEM;
4293         cmd = __ipa_cmd(iob);
4294         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4295         access_ctrl_req->subcmd_code = isolation;
4296
4297         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4298                                &fallback);
4299         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4300         return rc;
4301 }
4302
4303 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4304 {
4305         int rc = 0;
4306
4307         QETH_CARD_TEXT(card, 4, "setactlo");
4308
4309         if ((IS_OSD(card) || IS_OSX(card)) &&
4310             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4311                 rc = qeth_setadpparms_set_access_ctrl(card,
4312                         card->options.isolation, fallback);
4313                 if (rc) {
4314                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4315                                          rc, CARD_DEVID(card));
4316                         rc = -EOPNOTSUPP;
4317                 }
4318         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4319                 card->options.isolation = ISOLATION_MODE_NONE;
4320
4321                 dev_err(&card->gdev->dev, "Adapter does not "
4322                         "support QDIO data connection isolation\n");
4323                 rc = -EOPNOTSUPP;
4324         }
4325         return rc;
4326 }
4327
4328 void qeth_tx_timeout(struct net_device *dev)
4329 {
4330         struct qeth_card *card;
4331
4332         card = dev->ml_priv;
4333         QETH_CARD_TEXT(card, 4, "txtimeo");
4334         qeth_schedule_recovery(card);
4335 }
4336 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4337
4338 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4339 {
4340         struct qeth_card *card = dev->ml_priv;
4341         int rc = 0;
4342
4343         switch (regnum) {
4344         case MII_BMCR: /* Basic mode control register */
4345                 rc = BMCR_FULLDPLX;
4346                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4347                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4348                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4349                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4350                         rc |= BMCR_SPEED100;
4351                 break;
4352         case MII_BMSR: /* Basic mode status register */
4353                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4354                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4355                      BMSR_100BASE4;
4356                 break;
4357         case MII_PHYSID1: /* PHYS ID 1 */
4358                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4359                      dev->dev_addr[2];
4360                 rc = (rc >> 5) & 0xFFFF;
4361                 break;
4362         case MII_PHYSID2: /* PHYS ID 2 */
4363                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4364                 break;
4365         case MII_ADVERTISE: /* Advertisement control reg */
4366                 rc = ADVERTISE_ALL;
4367                 break;
4368         case MII_LPA: /* Link partner ability reg */
4369                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4370                      LPA_100BASE4 | LPA_LPACK;
4371                 break;
4372         case MII_EXPANSION: /* Expansion register */
4373                 break;
4374         case MII_DCOUNTER: /* disconnect counter */
4375                 break;
4376         case MII_FCSCOUNTER: /* false carrier counter */
4377                 break;
4378         case MII_NWAYTEST: /* N-way auto-neg test register */
4379                 break;
4380         case MII_RERRCOUNTER: /* rx error counter */
4381                 rc = card->stats.rx_length_errors +
4382                      card->stats.rx_frame_errors +
4383                      card->stats.rx_fifo_errors;
4384                 break;
4385         case MII_SREVISION: /* silicon revision */
4386                 break;
4387         case MII_RESV1: /* reserved 1 */
4388                 break;
4389         case MII_LBRERROR: /* loopback, rx, bypass error */
4390                 break;
4391         case MII_PHYADDR: /* physical address */
4392                 break;
4393         case MII_RESV2: /* reserved 2 */
4394                 break;
4395         case MII_TPISTATUS: /* TPI status for 10mbps */
4396                 break;
4397         case MII_NCONFIG: /* network interface config */
4398                 break;
4399         default:
4400                 break;
4401         }
4402         return rc;
4403 }
4404
4405 static int qeth_snmp_command_cb(struct qeth_card *card,
4406                                 struct qeth_reply *reply, unsigned long data)
4407 {
4408         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4409         struct qeth_arp_query_info *qinfo = reply->param;
4410         struct qeth_ipacmd_setadpparms *adp_cmd;
4411         unsigned int data_len;
4412         void *snmp_data;
4413
4414         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4415
4416         if (cmd->hdr.return_code) {
4417                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4418                 return -EIO;
4419         }
4420         if (cmd->data.setadapterparms.hdr.return_code) {
4421                 cmd->hdr.return_code =
4422                         cmd->data.setadapterparms.hdr.return_code;
4423                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4424                 return -EIO;
4425         }
4426
4427         adp_cmd = &cmd->data.setadapterparms;
4428         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4429         if (adp_cmd->hdr.seq_no == 1) {
4430                 snmp_data = &adp_cmd->data.snmp;
4431         } else {
4432                 snmp_data = &adp_cmd->data.snmp.request;
4433                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4434         }
4435
4436         /* check if there is enough room in userspace */
4437         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4438                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4439                 return -ENOSPC;
4440         }
4441         QETH_CARD_TEXT_(card, 4, "snore%i",
4442                         cmd->data.setadapterparms.hdr.used_total);
4443         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4444                         cmd->data.setadapterparms.hdr.seq_no);
4445         /*copy entries to user buffer*/
4446         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4447         qinfo->udata_offset += data_len;
4448
4449         if (cmd->data.setadapterparms.hdr.seq_no <
4450             cmd->data.setadapterparms.hdr.used_total)
4451                 return 1;
4452         return 0;
4453 }
4454
4455 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4456 {
4457         struct qeth_snmp_ureq __user *ureq;
4458         struct qeth_cmd_buffer *iob;
4459         unsigned int req_len;
4460         struct qeth_arp_query_info qinfo = {0, };
4461         int rc = 0;
4462
4463         QETH_CARD_TEXT(card, 3, "snmpcmd");
4464
4465         if (IS_VM_NIC(card))
4466                 return -EOPNOTSUPP;
4467
4468         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4469             IS_LAYER3(card))
4470                 return -EOPNOTSUPP;
4471
4472         ureq = (struct qeth_snmp_ureq __user *) udata;
4473         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4474             get_user(req_len, &ureq->hdr.req_len))
4475                 return -EFAULT;
4476
4477         /* Sanitize user input, to avoid overflows in iob size calculation: */
4478         if (req_len > QETH_BUFSIZE)
4479                 return -EINVAL;
4480
4481         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4482         if (!iob)
4483                 return -ENOMEM;
4484
4485         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4486                            &ureq->cmd, req_len)) {
4487                 qeth_put_cmd(iob);
4488                 return -EFAULT;
4489         }
4490
4491         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4492         if (!qinfo.udata) {
4493                 qeth_put_cmd(iob);
4494                 return -ENOMEM;
4495         }
4496         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4497
4498         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4499         if (rc)
4500                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4501                                  CARD_DEVID(card), rc);
4502         else {
4503                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4504                         rc = -EFAULT;
4505         }
4506
4507         kfree(qinfo.udata);
4508         return rc;
4509 }
4510
4511 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4512                 struct qeth_reply *reply, unsigned long data)
4513 {
4514         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4515         struct qeth_qoat_priv *priv;
4516         char *resdata;
4517         int resdatalen;
4518
4519         QETH_CARD_TEXT(card, 3, "qoatcb");
4520         if (qeth_setadpparms_inspect_rc(cmd))
4521                 return -EIO;
4522
4523         priv = (struct qeth_qoat_priv *)reply->param;
4524         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4525         resdata = (char *)data + 28;
4526
4527         if (resdatalen > (priv->buffer_len - priv->response_len))
4528                 return -ENOSPC;
4529
4530         memcpy((priv->buffer + priv->response_len), resdata,
4531                 resdatalen);
4532         priv->response_len += resdatalen;
4533
4534         if (cmd->data.setadapterparms.hdr.seq_no <
4535             cmd->data.setadapterparms.hdr.used_total)
4536                 return 1;
4537         return 0;
4538 }
4539
4540 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4541 {
4542         int rc = 0;
4543         struct qeth_cmd_buffer *iob;
4544         struct qeth_ipa_cmd *cmd;
4545         struct qeth_query_oat *oat_req;
4546         struct qeth_query_oat_data oat_data;
4547         struct qeth_qoat_priv priv;
4548         void __user *tmp;
4549
4550         QETH_CARD_TEXT(card, 3, "qoatcmd");
4551
4552         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4553                 rc = -EOPNOTSUPP;
4554                 goto out;
4555         }
4556
4557         if (copy_from_user(&oat_data, udata,
4558             sizeof(struct qeth_query_oat_data))) {
4559                         rc = -EFAULT;
4560                         goto out;
4561         }
4562
4563         priv.buffer_len = oat_data.buffer_len;
4564         priv.response_len = 0;
4565         priv.buffer = vzalloc(oat_data.buffer_len);
4566         if (!priv.buffer) {
4567                 rc = -ENOMEM;
4568                 goto out;
4569         }
4570
4571         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4572                                    SETADP_DATA_SIZEOF(query_oat));
4573         if (!iob) {
4574                 rc = -ENOMEM;
4575                 goto out_free;
4576         }
4577         cmd = __ipa_cmd(iob);
4578         oat_req = &cmd->data.setadapterparms.data.query_oat;
4579         oat_req->subcmd_code = oat_data.command;
4580
4581         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4582                                &priv);
4583         if (!rc) {
4584                 if (is_compat_task())
4585                         tmp = compat_ptr(oat_data.ptr);
4586                 else
4587                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4588
4589                 if (copy_to_user(tmp, priv.buffer,
4590                     priv.response_len)) {
4591                         rc = -EFAULT;
4592                         goto out_free;
4593                 }
4594
4595                 oat_data.response_len = priv.response_len;
4596
4597                 if (copy_to_user(udata, &oat_data,
4598                     sizeof(struct qeth_query_oat_data)))
4599                         rc = -EFAULT;
4600         }
4601
4602 out_free:
4603         vfree(priv.buffer);
4604 out:
4605         return rc;
4606 }
4607
4608 static int qeth_query_card_info_cb(struct qeth_card *card,
4609                                    struct qeth_reply *reply, unsigned long data)
4610 {
4611         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4612         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4613         struct qeth_query_card_info *card_info;
4614
4615         QETH_CARD_TEXT(card, 2, "qcrdincb");
4616         if (qeth_setadpparms_inspect_rc(cmd))
4617                 return -EIO;
4618
4619         card_info = &cmd->data.setadapterparms.data.card_info;
4620         carrier_info->card_type = card_info->card_type;
4621         carrier_info->port_mode = card_info->port_mode;
4622         carrier_info->port_speed = card_info->port_speed;
4623         return 0;
4624 }
4625
4626 int qeth_query_card_info(struct qeth_card *card,
4627                          struct carrier_info *carrier_info)
4628 {
4629         struct qeth_cmd_buffer *iob;
4630
4631         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4632         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4633                 return -EOPNOTSUPP;
4634         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4635         if (!iob)
4636                 return -ENOMEM;
4637         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4638                                         (void *)carrier_info);
4639 }
4640
4641 /**
4642  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4643  * @card: pointer to a qeth_card
4644  *
4645  * Returns
4646  *      0, if a MAC address has been set for the card's netdevice
4647  *      a return code, for various error conditions
4648  */
4649 int qeth_vm_request_mac(struct qeth_card *card)
4650 {
4651         struct diag26c_mac_resp *response;
4652         struct diag26c_mac_req *request;
4653         struct ccw_dev_id id;
4654         int rc;
4655
4656         QETH_CARD_TEXT(card, 2, "vmreqmac");
4657
4658         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4659         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4660         if (!request || !response) {
4661                 rc = -ENOMEM;
4662                 goto out;
4663         }
4664
4665         ccw_device_get_id(CARD_DDEV(card), &id);
4666         request->resp_buf_len = sizeof(*response);
4667         request->resp_version = DIAG26C_VERSION2;
4668         request->op_code = DIAG26C_GET_MAC;
4669         request->devno = id.devno;
4670
4671         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4672         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4673         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4674         if (rc)
4675                 goto out;
4676         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4677
4678         if (request->resp_buf_len < sizeof(*response) ||
4679             response->version != request->resp_version) {
4680                 rc = -EIO;
4681                 QETH_CARD_TEXT(card, 2, "badresp");
4682                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4683                               sizeof(request->resp_buf_len));
4684         } else if (!is_valid_ether_addr(response->mac)) {
4685                 rc = -EINVAL;
4686                 QETH_CARD_TEXT(card, 2, "badmac");
4687                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4688         } else {
4689                 ether_addr_copy(card->dev->dev_addr, response->mac);
4690         }
4691
4692 out:
4693         kfree(response);
4694         kfree(request);
4695         return rc;
4696 }
4697 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4698
4699 static void qeth_determine_capabilities(struct qeth_card *card)
4700 {
4701         struct qeth_channel *channel = &card->data;
4702         struct ccw_device *ddev = channel->ccwdev;
4703         int rc;
4704         int ddev_offline = 0;
4705
4706         QETH_CARD_TEXT(card, 2, "detcapab");
4707         if (!ddev->online) {
4708                 ddev_offline = 1;
4709                 rc = ccw_device_set_online(ddev);
4710                 if (rc) {
4711                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4712                         goto out;
4713                 }
4714         }
4715
4716         rc = qeth_read_conf_data(card);
4717         if (rc) {
4718                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4719                                  CARD_DEVID(card), rc);
4720                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4721                 goto out_offline;
4722         }
4723
4724         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4725         if (rc)
4726                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4727
4728         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4729         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4730         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4731         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4732         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4733         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4734             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4735             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4736                 dev_info(&card->gdev->dev,
4737                         "Completion Queueing supported\n");
4738         } else {
4739                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4740         }
4741
4742
4743 out_offline:
4744         if (ddev_offline == 1)
4745                 qeth_stop_channel(channel);
4746 out:
4747         return;
4748 }
4749
4750 static void qeth_qdio_establish_cq(struct qeth_card *card,
4751                                    struct qdio_buffer **in_sbal_ptrs,
4752                                    void (**queue_start_poll)
4753                                         (struct ccw_device *, int,
4754                                          unsigned long))
4755 {
4756         int i;
4757
4758         if (card->options.cq == QETH_CQ_ENABLED) {
4759                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4760                              (card->qdio.no_in_queues - 1);
4761                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4762                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4763                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4764                 }
4765
4766                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4767         }
4768 }
4769
4770 static int qeth_qdio_establish(struct qeth_card *card)
4771 {
4772         struct qdio_initialize init_data;
4773         char *qib_param_field;
4774         struct qdio_buffer **in_sbal_ptrs;
4775         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4776         struct qdio_buffer **out_sbal_ptrs;
4777         int i, j, k;
4778         int rc = 0;
4779
4780         QETH_CARD_TEXT(card, 2, "qdioest");
4781
4782         qib_param_field = kzalloc(FIELD_SIZEOF(struct qib, parm), GFP_KERNEL);
4783         if (!qib_param_field) {
4784                 rc =  -ENOMEM;
4785                 goto out_free_nothing;
4786         }
4787
4788         qeth_create_qib_param_field(card, qib_param_field);
4789         qeth_create_qib_param_field_blkt(card, qib_param_field);
4790
4791         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4792                                sizeof(void *),
4793                                GFP_KERNEL);
4794         if (!in_sbal_ptrs) {
4795                 rc = -ENOMEM;
4796                 goto out_free_qib_param;
4797         }
4798         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4799                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4800                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4801         }
4802
4803         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4804                                    GFP_KERNEL);
4805         if (!queue_start_poll) {
4806                 rc = -ENOMEM;
4807                 goto out_free_in_sbals;
4808         }
4809         for (i = 0; i < card->qdio.no_in_queues; ++i)
4810                 queue_start_poll[i] = qeth_qdio_start_poll;
4811
4812         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4813
4814         out_sbal_ptrs =
4815                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4816                         sizeof(void *),
4817                         GFP_KERNEL);
4818         if (!out_sbal_ptrs) {
4819                 rc = -ENOMEM;
4820                 goto out_free_queue_start_poll;
4821         }
4822         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4823                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4824                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4825                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4826                 }
4827
4828         memset(&init_data, 0, sizeof(struct qdio_initialize));
4829         init_data.cdev                   = CARD_DDEV(card);
4830         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4831                                                           QDIO_QETH_QFMT;
4832         init_data.qib_param_field_format = 0;
4833         init_data.qib_param_field        = qib_param_field;
4834         init_data.no_input_qs            = card->qdio.no_in_queues;
4835         init_data.no_output_qs           = card->qdio.no_out_queues;
4836         init_data.input_handler          = qeth_qdio_input_handler;
4837         init_data.output_handler         = qeth_qdio_output_handler;
4838         init_data.queue_start_poll_array = queue_start_poll;
4839         init_data.int_parm               = (unsigned long) card;
4840         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4841         init_data.output_sbal_addr_array = out_sbal_ptrs;
4842         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4843         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
4844
4845         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4846                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4847                 rc = qdio_allocate(&init_data);
4848                 if (rc) {
4849                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4850                         goto out;
4851                 }
4852                 rc = qdio_establish(&init_data);
4853                 if (rc) {
4854                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4855                         qdio_free(CARD_DDEV(card));
4856                 }
4857         }
4858
4859         switch (card->options.cq) {
4860         case QETH_CQ_ENABLED:
4861                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4862                 break;
4863         case QETH_CQ_DISABLED:
4864                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4865                 break;
4866         default:
4867                 break;
4868         }
4869 out:
4870         kfree(out_sbal_ptrs);
4871 out_free_queue_start_poll:
4872         kfree(queue_start_poll);
4873 out_free_in_sbals:
4874         kfree(in_sbal_ptrs);
4875 out_free_qib_param:
4876         kfree(qib_param_field);
4877 out_free_nothing:
4878         return rc;
4879 }
4880
4881 static void qeth_core_free_card(struct qeth_card *card)
4882 {
4883         QETH_CARD_TEXT(card, 2, "freecrd");
4884         qeth_clean_channel(&card->read);
4885         qeth_clean_channel(&card->write);
4886         qeth_clean_channel(&card->data);
4887         qeth_put_cmd(card->read_cmd);
4888         destroy_workqueue(card->event_wq);
4889         unregister_service_level(&card->qeth_service_level);
4890         dev_set_drvdata(&card->gdev->dev, NULL);
4891         kfree(card);
4892 }
4893
4894 void qeth_trace_features(struct qeth_card *card)
4895 {
4896         QETH_CARD_TEXT(card, 2, "features");
4897         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4898         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4899         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4900         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4901                       sizeof(card->info.diagass_support));
4902 }
4903 EXPORT_SYMBOL_GPL(qeth_trace_features);
4904
4905 static struct ccw_device_id qeth_ids[] = {
4906         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4907                                         .driver_info = QETH_CARD_TYPE_OSD},
4908         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4909                                         .driver_info = QETH_CARD_TYPE_IQD},
4910         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4911                                         .driver_info = QETH_CARD_TYPE_OSN},
4912         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4913                                         .driver_info = QETH_CARD_TYPE_OSM},
4914         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4915                                         .driver_info = QETH_CARD_TYPE_OSX},
4916         {},
4917 };
4918 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4919
4920 static struct ccw_driver qeth_ccw_driver = {
4921         .driver = {
4922                 .owner = THIS_MODULE,
4923                 .name = "qeth",
4924         },
4925         .ids = qeth_ids,
4926         .probe = ccwgroup_probe_ccwdev,
4927         .remove = ccwgroup_remove_ccwdev,
4928 };
4929
4930 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4931 {
4932         int retries = 3;
4933         int rc;
4934
4935         QETH_CARD_TEXT(card, 2, "hrdsetup");
4936         atomic_set(&card->force_alloc_skb, 0);
4937         rc = qeth_update_from_chp_desc(card);
4938         if (rc)
4939                 return rc;
4940 retry:
4941         if (retries < 3)
4942                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4943                                  CARD_DEVID(card));
4944         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4945         qeth_stop_channel(&card->data);
4946         qeth_stop_channel(&card->write);
4947         qeth_stop_channel(&card->read);
4948         qdio_free(CARD_DDEV(card));
4949         rc = ccw_device_set_online(CARD_RDEV(card));
4950         if (rc)
4951                 goto retriable;
4952         rc = ccw_device_set_online(CARD_WDEV(card));
4953         if (rc)
4954                 goto retriable;
4955         rc = ccw_device_set_online(CARD_DDEV(card));
4956         if (rc)
4957                 goto retriable;
4958 retriable:
4959         if (rc == -ERESTARTSYS) {
4960                 QETH_CARD_TEXT(card, 2, "break1");
4961                 return rc;
4962         } else if (rc) {
4963                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4964                 if (--retries < 0)
4965                         goto out;
4966                 else
4967                         goto retry;
4968         }
4969         qeth_determine_capabilities(card);
4970         qeth_init_tokens(card);
4971         qeth_init_func_level(card);
4972
4973         rc = qeth_idx_activate_read_channel(card);
4974         if (rc == -EINTR) {
4975                 QETH_CARD_TEXT(card, 2, "break2");
4976                 return rc;
4977         } else if (rc) {
4978                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4979                 if (--retries < 0)
4980                         goto out;
4981                 else
4982                         goto retry;
4983         }
4984
4985         rc = qeth_idx_activate_write_channel(card);
4986         if (rc == -EINTR) {
4987                 QETH_CARD_TEXT(card, 2, "break3");
4988                 return rc;
4989         } else if (rc) {
4990                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4991                 if (--retries < 0)
4992                         goto out;
4993                 else
4994                         goto retry;
4995         }
4996         card->read_or_write_problem = 0;
4997         rc = qeth_mpc_initialize(card);
4998         if (rc) {
4999                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5000                 goto out;
5001         }
5002
5003         rc = qeth_send_startlan(card);
5004         if (rc) {
5005                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5006                 if (rc == -ENETDOWN) {
5007                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5008                         *carrier_ok = false;
5009                 } else {
5010                         goto out;
5011                 }
5012         } else {
5013                 *carrier_ok = true;
5014         }
5015
5016         card->options.ipa4.supported_funcs = 0;
5017         card->options.ipa6.supported_funcs = 0;
5018         card->options.adp.supported_funcs = 0;
5019         card->options.sbp.supported_funcs = 0;
5020         card->info.diagass_support = 0;
5021         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5022         if (rc == -ENOMEM)
5023                 goto out;
5024         if (qeth_is_supported(card, IPA_IPV6)) {
5025                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5026                 if (rc == -ENOMEM)
5027                         goto out;
5028         }
5029         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5030                 rc = qeth_query_setadapterparms(card);
5031                 if (rc < 0) {
5032                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5033                         goto out;
5034                 }
5035         }
5036         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5037                 rc = qeth_query_setdiagass(card);
5038                 if (rc < 0) {
5039                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5040                         goto out;
5041                 }
5042         }
5043
5044         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5045             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5046                 card->info.hwtrap = 0;
5047
5048         rc = qeth_set_access_ctrl_online(card, 0);
5049         if (rc)
5050                 goto out;
5051
5052         return 0;
5053 out:
5054         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5055                 "an error on the device\n");
5056         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5057                          CARD_DEVID(card), rc);
5058         return rc;
5059 }
5060 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5061
5062 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5063 {
5064         struct page *page = virt_to_page(data);
5065         unsigned int next_frag;
5066
5067         next_frag = skb_shinfo(skb)->nr_frags;
5068         get_page(page);
5069         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5070                         data_len);
5071 }
5072
5073 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5074 {
5075         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5076 }
5077
5078 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5079                 struct qeth_qdio_buffer *qethbuffer,
5080                 struct qdio_buffer_element **__element, int *__offset,
5081                 struct qeth_hdr **hdr)
5082 {
5083         struct qdio_buffer_element *element = *__element;
5084         struct qdio_buffer *buffer = qethbuffer->buffer;
5085         unsigned int linear_len = 0;
5086         int offset = *__offset;
5087         bool use_rx_sg = false;
5088         unsigned int headroom;
5089         struct sk_buff *skb;
5090         int skb_len = 0;
5091
5092 next_packet:
5093         /* qeth_hdr must not cross element boundaries */
5094         while (element->length < offset + sizeof(struct qeth_hdr)) {
5095                 if (qeth_is_last_sbale(element))
5096                         return NULL;
5097                 element++;
5098                 offset = 0;
5099         }
5100         *hdr = element->addr + offset;
5101
5102         offset += sizeof(struct qeth_hdr);
5103         skb = NULL;
5104
5105         switch ((*hdr)->hdr.l2.id) {
5106         case QETH_HEADER_TYPE_LAYER2:
5107                 skb_len = (*hdr)->hdr.l2.pkt_length;
5108                 linear_len = ETH_HLEN;
5109                 headroom = 0;
5110                 break;
5111         case QETH_HEADER_TYPE_LAYER3:
5112                 skb_len = (*hdr)->hdr.l3.length;
5113                 if (!IS_LAYER3(card)) {
5114                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5115                         goto walk_packet;
5116                 }
5117
5118                 if ((*hdr)->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5119                         linear_len = ETH_HLEN;
5120                         headroom = 0;
5121                         break;
5122                 }
5123
5124                 if ((*hdr)->hdr.l3.flags & QETH_HDR_IPV6)
5125                         linear_len = sizeof(struct ipv6hdr);
5126                 else
5127                         linear_len = sizeof(struct iphdr);
5128                 headroom = ETH_HLEN;
5129                 break;
5130         case QETH_HEADER_TYPE_OSN:
5131                 skb_len = (*hdr)->hdr.osn.pdu_length;
5132                 if (!IS_OSN(card)) {
5133                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5134                         goto walk_packet;
5135                 }
5136
5137                 linear_len = skb_len;
5138                 headroom = sizeof(struct qeth_hdr);
5139                 break;
5140         default:
5141                 if ((*hdr)->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5142                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5143                 else
5144                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5145
5146                 /* Can't determine packet length, drop the whole buffer. */
5147                 return NULL;
5148         }
5149
5150         if (skb_len < linear_len) {
5151                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5152                 goto walk_packet;
5153         }
5154
5155         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5156                     ((skb_len >= card->options.rx_sg_cb) &&
5157                      !atomic_read(&card->force_alloc_skb) &&
5158                      !IS_OSN(card));
5159
5160         if (use_rx_sg && qethbuffer->rx_skb) {
5161                 /* QETH_CQ_ENABLED only: */
5162                 skb = qethbuffer->rx_skb;
5163                 qethbuffer->rx_skb = NULL;
5164         } else {
5165                 if (!use_rx_sg)
5166                         linear_len = skb_len;
5167                 skb = napi_alloc_skb(&card->napi, linear_len + headroom);
5168         }
5169
5170         if (!skb)
5171                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5172         else if (headroom)
5173                 skb_reserve(skb, headroom);
5174
5175 walk_packet:
5176         while (skb_len) {
5177                 int data_len = min(skb_len, (int)(element->length - offset));
5178                 char *data = element->addr + offset;
5179
5180                 skb_len -= data_len;
5181                 offset += data_len;
5182
5183                 /* Extract data from current element: */
5184                 if (skb && data_len) {
5185                         if (linear_len) {
5186                                 unsigned int copy_len;
5187
5188                                 copy_len = min_t(unsigned int, linear_len,
5189                                                  data_len);
5190
5191                                 skb_put_data(skb, data, copy_len);
5192                                 linear_len -= copy_len;
5193                                 data_len -= copy_len;
5194                                 data += copy_len;
5195                         }
5196
5197                         if (data_len)
5198                                 qeth_create_skb_frag(skb, data, data_len);
5199                 }
5200
5201                 /* Step forward to next element: */
5202                 if (skb_len) {
5203                         if (qeth_is_last_sbale(element)) {
5204                                 QETH_CARD_TEXT(card, 4, "unexeob");
5205                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5206                                 if (skb) {
5207                                         dev_kfree_skb_any(skb);
5208                                         QETH_CARD_STAT_INC(card,
5209                                                            rx_length_errors);
5210                                 }
5211                                 return NULL;
5212                         }
5213                         element++;
5214                         offset = 0;
5215                 }
5216         }
5217
5218         /* This packet was skipped, go get another one: */
5219         if (!skb)
5220                 goto next_packet;
5221
5222         *__element = element;
5223         *__offset = offset;
5224         if (use_rx_sg) {
5225                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5226                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5227                                    skb_shinfo(skb)->nr_frags);
5228         }
5229         return skb;
5230 }
5231 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5232
5233 int qeth_poll(struct napi_struct *napi, int budget)
5234 {
5235         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5236         int work_done = 0;
5237         struct qeth_qdio_buffer *buffer;
5238         int done;
5239         int new_budget = budget;
5240
5241         while (1) {
5242                 if (!card->rx.b_count) {
5243                         card->rx.qdio_err = 0;
5244                         card->rx.b_count = qdio_get_next_buffers(
5245                                 card->data.ccwdev, 0, &card->rx.b_index,
5246                                 &card->rx.qdio_err);
5247                         if (card->rx.b_count <= 0) {
5248                                 card->rx.b_count = 0;
5249                                 break;
5250                         }
5251                         card->rx.b_element =
5252                                 &card->qdio.in_q->bufs[card->rx.b_index]
5253                                 .buffer->element[0];
5254                         card->rx.e_offset = 0;
5255                 }
5256
5257                 while (card->rx.b_count) {
5258                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5259                         if (!(card->rx.qdio_err &&
5260                             qeth_check_qdio_errors(card, buffer->buffer,
5261                             card->rx.qdio_err, "qinerr")))
5262                                 work_done +=
5263                                         card->discipline->process_rx_buffer(
5264                                                 card, new_budget, &done);
5265                         else
5266                                 done = 1;
5267
5268                         if (done) {
5269                                 QETH_CARD_STAT_INC(card, rx_bufs);
5270                                 qeth_put_buffer_pool_entry(card,
5271                                         buffer->pool_entry);
5272                                 qeth_queue_input_buffer(card, card->rx.b_index);
5273                                 card->rx.b_count--;
5274                                 if (card->rx.b_count) {
5275                                         card->rx.b_index =
5276                                                 QDIO_BUFNR(card->rx.b_index + 1);
5277                                         card->rx.b_element =
5278                                                 &card->qdio.in_q
5279                                                 ->bufs[card->rx.b_index]
5280                                                 .buffer->element[0];
5281                                         card->rx.e_offset = 0;
5282                                 }
5283                         }
5284
5285                         if (work_done >= budget)
5286                                 goto out;
5287                         else
5288                                 new_budget = budget - work_done;
5289                 }
5290         }
5291
5292         if (napi_complete_done(napi, work_done) &&
5293             qdio_start_irq(CARD_DDEV(card), 0))
5294                 napi_schedule(napi);
5295 out:
5296         return work_done;
5297 }
5298 EXPORT_SYMBOL_GPL(qeth_poll);
5299
5300 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5301                                  unsigned int bidx, bool error, int budget)
5302 {
5303         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5304         u8 sflags = buffer->buffer->element[15].sflags;
5305         struct qeth_card *card = queue->card;
5306
5307         if (queue->bufstates && (queue->bufstates[bidx].flags &
5308                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5309                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5310
5311                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5312                                                    QETH_QDIO_BUF_PENDING) ==
5313                     QETH_QDIO_BUF_PRIMED)
5314                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5315
5316                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5317
5318                 /* prepare the queue slot for re-use: */
5319                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5320                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5321                         QETH_CARD_TEXT(card, 2, "outofbuf");
5322                         qeth_schedule_recovery(card);
5323                 }
5324
5325                 return;
5326         }
5327
5328         if (card->options.cq == QETH_CQ_ENABLED)
5329                 qeth_notify_skbs(queue, buffer,
5330                                  qeth_compute_cq_notification(sflags, 0));
5331         qeth_clear_output_buffer(queue, buffer, error, budget);
5332 }
5333
5334 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5335 {
5336         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5337         unsigned int queue_no = queue->queue_no;
5338         struct qeth_card *card = queue->card;
5339         struct net_device *dev = card->dev;
5340         unsigned int work_done = 0;
5341         struct netdev_queue *txq;
5342
5343         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5344
5345         while (1) {
5346                 unsigned int start, error, i;
5347                 unsigned int packets = 0;
5348                 unsigned int bytes = 0;
5349                 int completed;
5350
5351                 if (qeth_out_queue_is_empty(queue)) {
5352                         napi_complete(napi);
5353                         return 0;
5354                 }
5355
5356                 /* Give the CPU a breather: */
5357                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5358                         QETH_TXQ_STAT_INC(queue, completion_yield);
5359                         if (napi_complete_done(napi, 0))
5360                                 napi_schedule(napi);
5361                         return 0;
5362                 }
5363
5364                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5365                                                &start, &error);
5366                 if (completed <= 0) {
5367                         /* Ensure we see TX completion for pending work: */
5368                         if (napi_complete_done(napi, 0))
5369                                 qeth_tx_arm_timer(queue);
5370                         return 0;
5371                 }
5372
5373                 for (i = start; i < start + completed; i++) {
5374                         struct qeth_qdio_out_buffer *buffer;
5375                         unsigned int bidx = QDIO_BUFNR(i);
5376
5377                         buffer = queue->bufs[bidx];
5378                         packets += skb_queue_len(&buffer->skb_list);
5379                         bytes += buffer->bytes;
5380
5381                         qeth_handle_send_error(card, buffer, error);
5382                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5383                         qeth_cleanup_handled_pending(queue, bidx, false);
5384                 }
5385
5386                 netdev_tx_completed_queue(txq, packets, bytes);
5387                 atomic_sub(completed, &queue->used_buffers);
5388                 work_done += completed;
5389
5390                 /* xmit may have observed the full-condition, but not yet
5391                  * stopped the txq. In which case the code below won't trigger.
5392                  * So before returning, xmit will re-check the txq's fill level
5393                  * and wake it up if needed.
5394                  */
5395                 if (netif_tx_queue_stopped(txq) &&
5396                     !qeth_out_queue_is_full(queue))
5397                         netif_tx_wake_queue(txq);
5398         }
5399 }
5400
5401 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5402 {
5403         if (!cmd->hdr.return_code)
5404                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5405         return cmd->hdr.return_code;
5406 }
5407
5408 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5409                                         struct qeth_reply *reply,
5410                                         unsigned long data)
5411 {
5412         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5413         struct qeth_ipa_caps *caps = reply->param;
5414
5415         if (qeth_setassparms_inspect_rc(cmd))
5416                 return -EIO;
5417
5418         caps->supported = cmd->data.setassparms.data.caps.supported;
5419         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5420         return 0;
5421 }
5422
5423 int qeth_setassparms_cb(struct qeth_card *card,
5424                         struct qeth_reply *reply, unsigned long data)
5425 {
5426         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5427
5428         QETH_CARD_TEXT(card, 4, "defadpcb");
5429
5430         if (cmd->hdr.return_code)
5431                 return -EIO;
5432
5433         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5434         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5435                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5436         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5437                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5438         return 0;
5439 }
5440 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5441
5442 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5443                                                  enum qeth_ipa_funcs ipa_func,
5444                                                  u16 cmd_code,
5445                                                  unsigned int data_length,
5446                                                  enum qeth_prot_versions prot)
5447 {
5448         struct qeth_ipacmd_setassparms *setassparms;
5449         struct qeth_ipacmd_setassparms_hdr *hdr;
5450         struct qeth_cmd_buffer *iob;
5451
5452         QETH_CARD_TEXT(card, 4, "getasscm");
5453         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5454                                  data_length +
5455                                  offsetof(struct qeth_ipacmd_setassparms,
5456                                           data));
5457         if (!iob)
5458                 return NULL;
5459
5460         setassparms = &__ipa_cmd(iob)->data.setassparms;
5461         setassparms->assist_no = ipa_func;
5462
5463         hdr = &setassparms->hdr;
5464         hdr->length = sizeof(*hdr) + data_length;
5465         hdr->command_code = cmd_code;
5466         return iob;
5467 }
5468 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5469
5470 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5471                                       enum qeth_ipa_funcs ipa_func,
5472                                       u16 cmd_code, u32 *data,
5473                                       enum qeth_prot_versions prot)
5474 {
5475         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5476         struct qeth_cmd_buffer *iob;
5477
5478         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5479         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5480         if (!iob)
5481                 return -ENOMEM;
5482
5483         if (data)
5484                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5485         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5486 }
5487 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5488
5489 static void qeth_unregister_dbf_views(void)
5490 {
5491         int x;
5492         for (x = 0; x < QETH_DBF_INFOS; x++) {
5493                 debug_unregister(qeth_dbf[x].id);
5494                 qeth_dbf[x].id = NULL;
5495         }
5496 }
5497
5498 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5499 {
5500         char dbf_txt_buf[32];
5501         va_list args;
5502
5503         if (!debug_level_enabled(id, level))
5504                 return;
5505         va_start(args, fmt);
5506         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5507         va_end(args);
5508         debug_text_event(id, level, dbf_txt_buf);
5509 }
5510 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5511
5512 static int qeth_register_dbf_views(void)
5513 {
5514         int ret;
5515         int x;
5516
5517         for (x = 0; x < QETH_DBF_INFOS; x++) {
5518                 /* register the areas */
5519                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5520                                                 qeth_dbf[x].pages,
5521                                                 qeth_dbf[x].areas,
5522                                                 qeth_dbf[x].len);
5523                 if (qeth_dbf[x].id == NULL) {
5524                         qeth_unregister_dbf_views();
5525                         return -ENOMEM;
5526                 }
5527
5528                 /* register a view */
5529                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5530                 if (ret) {
5531                         qeth_unregister_dbf_views();
5532                         return ret;
5533                 }
5534
5535                 /* set a passing level */
5536                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5537         }
5538
5539         return 0;
5540 }
5541
5542 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5543
5544 int qeth_core_load_discipline(struct qeth_card *card,
5545                 enum qeth_discipline_id discipline)
5546 {
5547         mutex_lock(&qeth_mod_mutex);
5548         switch (discipline) {
5549         case QETH_DISCIPLINE_LAYER3:
5550                 card->discipline = try_then_request_module(
5551                         symbol_get(qeth_l3_discipline), "qeth_l3");
5552                 break;
5553         case QETH_DISCIPLINE_LAYER2:
5554                 card->discipline = try_then_request_module(
5555                         symbol_get(qeth_l2_discipline), "qeth_l2");
5556                 break;
5557         default:
5558                 break;
5559         }
5560         mutex_unlock(&qeth_mod_mutex);
5561
5562         if (!card->discipline) {
5563                 dev_err(&card->gdev->dev, "There is no kernel module to "
5564                         "support discipline %d\n", discipline);
5565                 return -EINVAL;
5566         }
5567
5568         card->options.layer = discipline;
5569         return 0;
5570 }
5571
5572 void qeth_core_free_discipline(struct qeth_card *card)
5573 {
5574         if (IS_LAYER2(card))
5575                 symbol_put(qeth_l2_discipline);
5576         else
5577                 symbol_put(qeth_l3_discipline);
5578         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5579         card->discipline = NULL;
5580 }
5581
5582 const struct device_type qeth_generic_devtype = {
5583         .name = "qeth_generic",
5584         .groups = qeth_generic_attr_groups,
5585 };
5586 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5587
5588 static const struct device_type qeth_osn_devtype = {
5589         .name = "qeth_osn",
5590         .groups = qeth_osn_attr_groups,
5591 };
5592
5593 #define DBF_NAME_LEN    20
5594
5595 struct qeth_dbf_entry {
5596         char dbf_name[DBF_NAME_LEN];
5597         debug_info_t *dbf_info;
5598         struct list_head dbf_list;
5599 };
5600
5601 static LIST_HEAD(qeth_dbf_list);
5602 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5603
5604 static debug_info_t *qeth_get_dbf_entry(char *name)
5605 {
5606         struct qeth_dbf_entry *entry;
5607         debug_info_t *rc = NULL;
5608
5609         mutex_lock(&qeth_dbf_list_mutex);
5610         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5611                 if (strcmp(entry->dbf_name, name) == 0) {
5612                         rc = entry->dbf_info;
5613                         break;
5614                 }
5615         }
5616         mutex_unlock(&qeth_dbf_list_mutex);
5617         return rc;
5618 }
5619
5620 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5621 {
5622         struct qeth_dbf_entry *new_entry;
5623
5624         card->debug = debug_register(name, 2, 1, 8);
5625         if (!card->debug) {
5626                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5627                 goto err;
5628         }
5629         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5630                 goto err_dbg;
5631         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5632         if (!new_entry)
5633                 goto err_dbg;
5634         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5635         new_entry->dbf_info = card->debug;
5636         mutex_lock(&qeth_dbf_list_mutex);
5637         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5638         mutex_unlock(&qeth_dbf_list_mutex);
5639
5640         return 0;
5641
5642 err_dbg:
5643         debug_unregister(card->debug);
5644 err:
5645         return -ENOMEM;
5646 }
5647
5648 static void qeth_clear_dbf_list(void)
5649 {
5650         struct qeth_dbf_entry *entry, *tmp;
5651
5652         mutex_lock(&qeth_dbf_list_mutex);
5653         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5654                 list_del(&entry->dbf_list);
5655                 debug_unregister(entry->dbf_info);
5656                 kfree(entry);
5657         }
5658         mutex_unlock(&qeth_dbf_list_mutex);
5659 }
5660
5661 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5662 {
5663         struct net_device *dev;
5664
5665         switch (card->info.type) {
5666         case QETH_CARD_TYPE_IQD:
5667                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5668                                        ether_setup, QETH_MAX_QUEUES, 1);
5669                 break;
5670         case QETH_CARD_TYPE_OSM:
5671                 dev = alloc_etherdev(0);
5672                 break;
5673         case QETH_CARD_TYPE_OSN:
5674                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5675                 break;
5676         default:
5677                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5678         }
5679
5680         if (!dev)
5681                 return NULL;
5682
5683         dev->ml_priv = card;
5684         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5685         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5686          /* initialized when device first goes online: */
5687         dev->max_mtu = 0;
5688         dev->mtu = 0;
5689         SET_NETDEV_DEV(dev, &card->gdev->dev);
5690         netif_carrier_off(dev);
5691
5692         if (IS_OSN(card)) {
5693                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5694         } else {
5695                 dev->ethtool_ops = &qeth_ethtool_ops;
5696                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5697                 dev->hw_features |= NETIF_F_SG;
5698                 dev->vlan_features |= NETIF_F_SG;
5699                 if (IS_IQD(card)) {
5700                         dev->features |= NETIF_F_SG;
5701                         if (netif_set_real_num_tx_queues(dev,
5702                                                          QETH_IQD_MIN_TXQ)) {
5703                                 free_netdev(dev);
5704                                 return NULL;
5705                         }
5706                 }
5707         }
5708
5709         return dev;
5710 }
5711
5712 struct net_device *qeth_clone_netdev(struct net_device *orig)
5713 {
5714         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5715
5716         if (!clone)
5717                 return NULL;
5718
5719         clone->dev_port = orig->dev_port;
5720         return clone;
5721 }
5722
5723 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5724 {
5725         struct qeth_card *card;
5726         struct device *dev;
5727         int rc;
5728         enum qeth_discipline_id enforced_disc;
5729         char dbf_name[DBF_NAME_LEN];
5730
5731         QETH_DBF_TEXT(SETUP, 2, "probedev");
5732
5733         dev = &gdev->dev;
5734         if (!get_device(dev))
5735                 return -ENODEV;
5736
5737         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5738
5739         card = qeth_alloc_card(gdev);
5740         if (!card) {
5741                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5742                 rc = -ENOMEM;
5743                 goto err_dev;
5744         }
5745
5746         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5747                 dev_name(&gdev->dev));
5748         card->debug = qeth_get_dbf_entry(dbf_name);
5749         if (!card->debug) {
5750                 rc = qeth_add_dbf_entry(card, dbf_name);
5751                 if (rc)
5752                         goto err_card;
5753         }
5754
5755         qeth_setup_card(card);
5756         card->dev = qeth_alloc_netdev(card);
5757         if (!card->dev) {
5758                 rc = -ENOMEM;
5759                 goto err_card;
5760         }
5761
5762         card->qdio.no_out_queues = card->dev->num_tx_queues;
5763         rc = qeth_update_from_chp_desc(card);
5764         if (rc)
5765                 goto err_chp_desc;
5766         qeth_determine_capabilities(card);
5767         qeth_set_blkt_defaults(card);
5768
5769         enforced_disc = qeth_enforce_discipline(card);
5770         switch (enforced_disc) {
5771         case QETH_DISCIPLINE_UNDETERMINED:
5772                 gdev->dev.type = &qeth_generic_devtype;
5773                 break;
5774         default:
5775                 card->info.layer_enforced = true;
5776                 rc = qeth_core_load_discipline(card, enforced_disc);
5777                 if (rc)
5778                         goto err_load;
5779
5780                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5781                                                 card->discipline->devtype;
5782                 rc = card->discipline->setup(card->gdev);
5783                 if (rc)
5784                         goto err_disc;
5785                 break;
5786         }
5787
5788         return 0;
5789
5790 err_disc:
5791         qeth_core_free_discipline(card);
5792 err_load:
5793 err_chp_desc:
5794         free_netdev(card->dev);
5795 err_card:
5796         qeth_core_free_card(card);
5797 err_dev:
5798         put_device(dev);
5799         return rc;
5800 }
5801
5802 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5803 {
5804         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5805
5806         QETH_CARD_TEXT(card, 2, "removedv");
5807
5808         if (card->discipline) {
5809                 card->discipline->remove(gdev);
5810                 qeth_core_free_discipline(card);
5811         }
5812
5813         qeth_free_qdio_queues(card);
5814
5815         free_netdev(card->dev);
5816         qeth_core_free_card(card);
5817         put_device(&gdev->dev);
5818 }
5819
5820 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5821 {
5822         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5823         int rc = 0;
5824         enum qeth_discipline_id def_discipline;
5825
5826         if (!card->discipline) {
5827                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5828                                                 QETH_DISCIPLINE_LAYER2;
5829                 rc = qeth_core_load_discipline(card, def_discipline);
5830                 if (rc)
5831                         goto err;
5832                 rc = card->discipline->setup(card->gdev);
5833                 if (rc) {
5834                         qeth_core_free_discipline(card);
5835                         goto err;
5836                 }
5837         }
5838         rc = card->discipline->set_online(gdev);
5839 err:
5840         return rc;
5841 }
5842
5843 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5844 {
5845         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5846         return card->discipline->set_offline(gdev);
5847 }
5848
5849 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5850 {
5851         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5852         qeth_set_allowed_threads(card, 0, 1);
5853         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5854                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5855         qeth_qdio_clear_card(card, 0);
5856         qeth_drain_output_queues(card);
5857         qdio_free(CARD_DDEV(card));
5858 }
5859
5860 static int qeth_suspend(struct ccwgroup_device *gdev)
5861 {
5862         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5863
5864         qeth_set_allowed_threads(card, 0, 1);
5865         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5866         if (gdev->state == CCWGROUP_OFFLINE)
5867                 return 0;
5868
5869         card->discipline->set_offline(gdev);
5870         return 0;
5871 }
5872
5873 static int qeth_resume(struct ccwgroup_device *gdev)
5874 {
5875         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5876         int rc;
5877
5878         rc = card->discipline->set_online(gdev);
5879
5880         qeth_set_allowed_threads(card, 0xffffffff, 0);
5881         if (rc)
5882                 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5883         return rc;
5884 }
5885
5886 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5887                            size_t count)
5888 {
5889         int err;
5890
5891         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5892                                   buf);
5893
5894         return err ? err : count;
5895 }
5896 static DRIVER_ATTR_WO(group);
5897
5898 static struct attribute *qeth_drv_attrs[] = {
5899         &driver_attr_group.attr,
5900         NULL,
5901 };
5902 static struct attribute_group qeth_drv_attr_group = {
5903         .attrs = qeth_drv_attrs,
5904 };
5905 static const struct attribute_group *qeth_drv_attr_groups[] = {
5906         &qeth_drv_attr_group,
5907         NULL,
5908 };
5909
5910 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5911         .driver = {
5912                 .groups = qeth_drv_attr_groups,
5913                 .owner = THIS_MODULE,
5914                 .name = "qeth",
5915         },
5916         .ccw_driver = &qeth_ccw_driver,
5917         .setup = qeth_core_probe_device,
5918         .remove = qeth_core_remove_device,
5919         .set_online = qeth_core_set_online,
5920         .set_offline = qeth_core_set_offline,
5921         .shutdown = qeth_core_shutdown,
5922         .prepare = NULL,
5923         .complete = NULL,
5924         .freeze = qeth_suspend,
5925         .thaw = qeth_resume,
5926         .restore = qeth_resume,
5927 };
5928
5929 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5930 {
5931         struct ccwgroup_device *gdev;
5932         struct qeth_card *card;
5933
5934         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5935         if (!gdev)
5936                 return NULL;
5937
5938         card = dev_get_drvdata(&gdev->dev);
5939         put_device(&gdev->dev);
5940         return card;
5941 }
5942 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5943
5944 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5945 {
5946         struct qeth_card *card = dev->ml_priv;
5947         struct mii_ioctl_data *mii_data;
5948         int rc = 0;
5949
5950         if (!card)
5951                 return -ENODEV;
5952
5953         switch (cmd) {
5954         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5955                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5956                 break;
5957         case SIOC_QETH_GET_CARD_TYPE:
5958                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5959                     !IS_VM_NIC(card))
5960                         return 1;
5961                 return 0;
5962         case SIOCGMIIPHY:
5963                 mii_data = if_mii(rq);
5964                 mii_data->phy_id = 0;
5965                 break;
5966         case SIOCGMIIREG:
5967                 mii_data = if_mii(rq);
5968                 if (mii_data->phy_id != 0)
5969                         rc = -EINVAL;
5970                 else
5971                         mii_data->val_out = qeth_mdio_read(dev,
5972                                 mii_data->phy_id, mii_data->reg_num);
5973                 break;
5974         case SIOC_QETH_QUERY_OAT:
5975                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5976                 break;
5977         default:
5978                 if (card->discipline->do_ioctl)
5979                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5980                 else
5981                         rc = -EOPNOTSUPP;
5982         }
5983         if (rc)
5984                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5985         return rc;
5986 }
5987 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5988
5989 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5990                               unsigned long data)
5991 {
5992         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5993         u32 *features = reply->param;
5994
5995         if (qeth_setassparms_inspect_rc(cmd))
5996                 return -EIO;
5997
5998         *features = cmd->data.setassparms.data.flags_32bit;
5999         return 0;
6000 }
6001
6002 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6003                              enum qeth_prot_versions prot)
6004 {
6005         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6006                                                  NULL, prot);
6007 }
6008
6009 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6010                             enum qeth_prot_versions prot)
6011 {
6012         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6013         struct qeth_cmd_buffer *iob;
6014         struct qeth_ipa_caps caps;
6015         u32 features;
6016         int rc;
6017
6018         /* some L3 HW requires combined L3+L4 csum offload: */
6019         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6020             cstype == IPA_OUTBOUND_CHECKSUM)
6021                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6022
6023         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6024                                        prot);
6025         if (!iob)
6026                 return -ENOMEM;
6027
6028         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6029         if (rc)
6030                 return rc;
6031
6032         if ((required_features & features) != required_features) {
6033                 qeth_set_csum_off(card, cstype, prot);
6034                 return -EOPNOTSUPP;
6035         }
6036
6037         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6038                                        SETASS_DATA_SIZEOF(flags_32bit),
6039                                        prot);
6040         if (!iob) {
6041                 qeth_set_csum_off(card, cstype, prot);
6042                 return -ENOMEM;
6043         }
6044
6045         if (features & QETH_IPA_CHECKSUM_LP2LP)
6046                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6047         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6048         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6049         if (rc) {
6050                 qeth_set_csum_off(card, cstype, prot);
6051                 return rc;
6052         }
6053
6054         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6055             !qeth_ipa_caps_enabled(&caps, required_features)) {
6056                 qeth_set_csum_off(card, cstype, prot);
6057                 return -EOPNOTSUPP;
6058         }
6059
6060         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6061                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6062         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
6063             cstype == IPA_OUTBOUND_CHECKSUM)
6064                 dev_warn(&card->gdev->dev,
6065                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6066                          QETH_CARD_IFNAME(card));
6067         return 0;
6068 }
6069
6070 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6071                              enum qeth_prot_versions prot)
6072 {
6073         return on ? qeth_set_csum_on(card, cstype, prot) :
6074                     qeth_set_csum_off(card, cstype, prot);
6075 }
6076
6077 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6078                              unsigned long data)
6079 {
6080         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6081         struct qeth_tso_start_data *tso_data = reply->param;
6082
6083         if (qeth_setassparms_inspect_rc(cmd))
6084                 return -EIO;
6085
6086         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6087         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6088         return 0;
6089 }
6090
6091 static int qeth_set_tso_off(struct qeth_card *card,
6092                             enum qeth_prot_versions prot)
6093 {
6094         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6095                                                  IPA_CMD_ASS_STOP, NULL, prot);
6096 }
6097
6098 static int qeth_set_tso_on(struct qeth_card *card,
6099                            enum qeth_prot_versions prot)
6100 {
6101         struct qeth_tso_start_data tso_data;
6102         struct qeth_cmd_buffer *iob;
6103         struct qeth_ipa_caps caps;
6104         int rc;
6105
6106         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6107                                        IPA_CMD_ASS_START, 0, prot);
6108         if (!iob)
6109                 return -ENOMEM;
6110
6111         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6112         if (rc)
6113                 return rc;
6114
6115         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6116                 qeth_set_tso_off(card, prot);
6117                 return -EOPNOTSUPP;
6118         }
6119
6120         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6121                                        IPA_CMD_ASS_ENABLE,
6122                                        SETASS_DATA_SIZEOF(caps), prot);
6123         if (!iob) {
6124                 qeth_set_tso_off(card, prot);
6125                 return -ENOMEM;
6126         }
6127
6128         /* enable TSO capability */
6129         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6130                 QETH_IPA_LARGE_SEND_TCP;
6131         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6132         if (rc) {
6133                 qeth_set_tso_off(card, prot);
6134                 return rc;
6135         }
6136
6137         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6138             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6139                 qeth_set_tso_off(card, prot);
6140                 return -EOPNOTSUPP;
6141         }
6142
6143         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6144                  tso_data.mss);
6145         return 0;
6146 }
6147
6148 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6149                             enum qeth_prot_versions prot)
6150 {
6151         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6152 }
6153
6154 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6155 {
6156         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6157         int rc_ipv6;
6158
6159         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6160                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6161                                             QETH_PROT_IPV4);
6162         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6163                 /* no/one Offload Assist available, so the rc is trivial */
6164                 return rc_ipv4;
6165
6166         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6167                                     QETH_PROT_IPV6);
6168
6169         if (on)
6170                 /* enable: success if any Assist is active */
6171                 return (rc_ipv6) ? rc_ipv4 : 0;
6172
6173         /* disable: failure if any Assist is still active */
6174         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6175 }
6176
6177 /**
6178  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6179  * @dev:        a net_device
6180  */
6181 void qeth_enable_hw_features(struct net_device *dev)
6182 {
6183         struct qeth_card *card = dev->ml_priv;
6184         netdev_features_t features;
6185
6186         features = dev->features;
6187         /* force-off any feature that might need an IPA sequence.
6188          * netdev_update_features() will restart them.
6189          */
6190         dev->features &= ~dev->hw_features;
6191         /* toggle VLAN filter, so that VIDs are re-programmed: */
6192         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6193                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6194                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6195         }
6196         netdev_update_features(dev);
6197         if (features != dev->features)
6198                 dev_warn(&card->gdev->dev,
6199                          "Device recovery failed to restore all offload features\n");
6200 }
6201 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6202
6203 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6204 {
6205         struct qeth_card *card = dev->ml_priv;
6206         netdev_features_t changed = dev->features ^ features;
6207         int rc = 0;
6208
6209         QETH_CARD_TEXT(card, 2, "setfeat");
6210         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6211
6212         if ((changed & NETIF_F_IP_CSUM)) {
6213                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6214                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6215                 if (rc)
6216                         changed ^= NETIF_F_IP_CSUM;
6217         }
6218         if (changed & NETIF_F_IPV6_CSUM) {
6219                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6220                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6221                 if (rc)
6222                         changed ^= NETIF_F_IPV6_CSUM;
6223         }
6224         if (changed & NETIF_F_RXCSUM) {
6225                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6226                 if (rc)
6227                         changed ^= NETIF_F_RXCSUM;
6228         }
6229         if (changed & NETIF_F_TSO) {
6230                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6231                                       QETH_PROT_IPV4);
6232                 if (rc)
6233                         changed ^= NETIF_F_TSO;
6234         }
6235         if (changed & NETIF_F_TSO6) {
6236                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6237                                       QETH_PROT_IPV6);
6238                 if (rc)
6239                         changed ^= NETIF_F_TSO6;
6240         }
6241
6242         /* everything changed successfully? */
6243         if ((dev->features ^ features) == changed)
6244                 return 0;
6245         /* something went wrong. save changed features and return error */
6246         dev->features ^= changed;
6247         return -EIO;
6248 }
6249 EXPORT_SYMBOL_GPL(qeth_set_features);
6250
6251 netdev_features_t qeth_fix_features(struct net_device *dev,
6252                                     netdev_features_t features)
6253 {
6254         struct qeth_card *card = dev->ml_priv;
6255
6256         QETH_CARD_TEXT(card, 2, "fixfeat");
6257         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6258                 features &= ~NETIF_F_IP_CSUM;
6259         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6260                 features &= ~NETIF_F_IPV6_CSUM;
6261         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6262             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6263                 features &= ~NETIF_F_RXCSUM;
6264         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6265                 features &= ~NETIF_F_TSO;
6266         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6267                 features &= ~NETIF_F_TSO6;
6268
6269         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6270         return features;
6271 }
6272 EXPORT_SYMBOL_GPL(qeth_fix_features);
6273
6274 netdev_features_t qeth_features_check(struct sk_buff *skb,
6275                                       struct net_device *dev,
6276                                       netdev_features_t features)
6277 {
6278         /* GSO segmentation builds skbs with
6279          *      a (small) linear part for the headers, and
6280          *      page frags for the data.
6281          * Compared to a linear skb, the header-only part consumes an
6282          * additional buffer element. This reduces buffer utilization, and
6283          * hurts throughput. So compress small segments into one element.
6284          */
6285         if (netif_needs_gso(skb, features)) {
6286                 /* match skb_segment(): */
6287                 unsigned int doffset = skb->data - skb_mac_header(skb);
6288                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6289                 unsigned int hroom = skb_headroom(skb);
6290
6291                 /* linearize only if resulting skb allocations are order-0: */
6292                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6293                         features &= ~NETIF_F_SG;
6294         }
6295
6296         return vlan_features_check(skb, features);
6297 }
6298 EXPORT_SYMBOL_GPL(qeth_features_check);
6299
6300 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6301 {
6302         struct qeth_card *card = dev->ml_priv;
6303         struct qeth_qdio_out_q *queue;
6304         unsigned int i;
6305
6306         QETH_CARD_TEXT(card, 5, "getstat");
6307
6308         stats->rx_packets = card->stats.rx_packets;
6309         stats->rx_bytes = card->stats.rx_bytes;
6310         stats->rx_errors = card->stats.rx_length_errors +
6311                            card->stats.rx_frame_errors +
6312                            card->stats.rx_fifo_errors;
6313         stats->rx_dropped = card->stats.rx_dropped_nomem +
6314                             card->stats.rx_dropped_notsupp +
6315                             card->stats.rx_dropped_runt;
6316         stats->multicast = card->stats.rx_multicast;
6317         stats->rx_length_errors = card->stats.rx_length_errors;
6318         stats->rx_frame_errors = card->stats.rx_frame_errors;
6319         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6320
6321         for (i = 0; i < card->qdio.no_out_queues; i++) {
6322                 queue = card->qdio.out_qs[i];
6323
6324                 stats->tx_packets += queue->stats.tx_packets;
6325                 stats->tx_bytes += queue->stats.tx_bytes;
6326                 stats->tx_errors += queue->stats.tx_errors;
6327                 stats->tx_dropped += queue->stats.tx_dropped;
6328         }
6329 }
6330 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6331
6332 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6333                           u8 cast_type, struct net_device *sb_dev)
6334 {
6335         if (cast_type != RTN_UNICAST)
6336                 return QETH_IQD_MCAST_TXQ;
6337         return QETH_IQD_MIN_UCAST_TXQ;
6338 }
6339 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6340
6341 int qeth_open(struct net_device *dev)
6342 {
6343         struct qeth_card *card = dev->ml_priv;
6344
6345         QETH_CARD_TEXT(card, 4, "qethopen");
6346
6347         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6348                 return -EIO;
6349
6350         card->data.state = CH_STATE_UP;
6351         netif_tx_start_all_queues(dev);
6352
6353         napi_enable(&card->napi);
6354         local_bh_disable();
6355         napi_schedule(&card->napi);
6356         if (IS_IQD(card)) {
6357                 struct qeth_qdio_out_q *queue;
6358                 unsigned int i;
6359
6360                 qeth_for_each_output_queue(card, queue, i) {
6361                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6362                                           QETH_NAPI_WEIGHT);
6363                         napi_enable(&queue->napi);
6364                         napi_schedule(&queue->napi);
6365                 }
6366         }
6367         /* kick-start the NAPI softirq: */
6368         local_bh_enable();
6369         return 0;
6370 }
6371 EXPORT_SYMBOL_GPL(qeth_open);
6372
6373 int qeth_stop(struct net_device *dev)
6374 {
6375         struct qeth_card *card = dev->ml_priv;
6376
6377         QETH_CARD_TEXT(card, 4, "qethstop");
6378         if (IS_IQD(card)) {
6379                 struct qeth_qdio_out_q *queue;
6380                 unsigned int i;
6381
6382                 /* Quiesce the NAPI instances: */
6383                 qeth_for_each_output_queue(card, queue, i) {
6384                         napi_disable(&queue->napi);
6385                         del_timer_sync(&queue->timer);
6386                 }
6387
6388                 /* Stop .ndo_start_xmit, might still access queue->napi. */
6389                 netif_tx_disable(dev);
6390
6391                 /* Queues may get re-allocated, so remove the NAPIs here. */
6392                 qeth_for_each_output_queue(card, queue, i)
6393                         netif_napi_del(&queue->napi);
6394         } else {
6395                 netif_tx_disable(dev);
6396         }
6397
6398         napi_disable(&card->napi);
6399         return 0;
6400 }
6401 EXPORT_SYMBOL_GPL(qeth_stop);
6402
6403 static int __init qeth_core_init(void)
6404 {
6405         int rc;
6406
6407         pr_info("loading core functions\n");
6408
6409         rc = qeth_register_dbf_views();
6410         if (rc)
6411                 goto dbf_err;
6412         qeth_core_root_dev = root_device_register("qeth");
6413         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6414         if (rc)
6415                 goto register_err;
6416         qeth_core_header_cache =
6417                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6418                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6419                                   0, NULL);
6420         if (!qeth_core_header_cache) {
6421                 rc = -ENOMEM;
6422                 goto slab_err;
6423         }
6424         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6425                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6426         if (!qeth_qdio_outbuf_cache) {
6427                 rc = -ENOMEM;
6428                 goto cqslab_err;
6429         }
6430         rc = ccw_driver_register(&qeth_ccw_driver);
6431         if (rc)
6432                 goto ccw_err;
6433         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6434         if (rc)
6435                 goto ccwgroup_err;
6436
6437         return 0;
6438
6439 ccwgroup_err:
6440         ccw_driver_unregister(&qeth_ccw_driver);
6441 ccw_err:
6442         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6443 cqslab_err:
6444         kmem_cache_destroy(qeth_core_header_cache);
6445 slab_err:
6446         root_device_unregister(qeth_core_root_dev);
6447 register_err:
6448         qeth_unregister_dbf_views();
6449 dbf_err:
6450         pr_err("Initializing the qeth device driver failed\n");
6451         return rc;
6452 }
6453
6454 static void __exit qeth_core_exit(void)
6455 {
6456         qeth_clear_dbf_list();
6457         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6458         ccw_driver_unregister(&qeth_ccw_driver);
6459         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6460         kmem_cache_destroy(qeth_core_header_cache);
6461         root_device_unregister(qeth_core_root_dev);
6462         qeth_unregister_dbf_views();
6463         pr_info("core functions removed\n");
6464 }
6465
6466 module_init(qeth_core_init);
6467 module_exit(qeth_core_exit);
6468 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6469 MODULE_DESCRIPTION("qeth core functions");
6470 MODULE_LICENSE("GPL");