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/rcutree.h>
  30 #include <linux/skbuff.h>
  31 #include <linux/vmalloc.h>
  32
  33 #include <net/iucv/af_iucv.h>
  34 #include <net/dsfield.h>
  35
  36 #include <asm/ebcdic.h>
  37 #include <asm/chpid.h>
  38 #include <asm/io.h>
  39 #include <asm/sysinfo.h>
  40 #include <asm/diag.h>
  41 #include <asm/cio.h>
  42 #include <asm/ccwdev.h>
  43 #include <asm/cpcmd.h>
  44
  45 #include "qeth_core.h"
  46
  47 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  48         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  49         /*                   N  P  A    M  L  V                      H  */
  50         [QETH_DBF_SETUP] = {"qeth_setup",
  51                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  52         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  53                             &debug_sprintf_view, NULL},
  54         [QETH_DBF_CTRL]  = {"qeth_control",
  55                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  56 };
  57 EXPORT_SYMBOL_GPL(qeth_dbf);
  58
  59 struct kmem_cache *qeth_core_header_cache;
  60 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62
  63 static struct device *qeth_core_root_dev;
  64 static struct dentry *qeth_debugfs_root;
  65 static struct lock_class_key qdio_out_skb_queue_key;
  66
  67 static void qeth_issue_next_read_cb(struct qeth_card *card,
  68                                     struct qeth_cmd_buffer *iob,
  69                                     unsigned int data_length);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_queues(struct qeth_card *card);
  72 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  73                 struct qeth_qdio_out_buffer *buf,
  74                 enum iucv_tx_notify notification);
  75 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
  76                                  int budget);
  77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  78
  79 static void qeth_close_dev_handler(struct work_struct *work)
  80 {
  81         struct qeth_card *card;
  82
  83         card = container_of(work, struct qeth_card, close_dev_work);
  84         QETH_CARD_TEXT(card, 2, "cldevhdl");
  85         ccwgroup_set_offline(card->gdev);
  86 }
  87
  88 static const char *qeth_get_cardname(struct qeth_card *card)
  89 {
  90         if (IS_VM_NIC(card)) {
  91                 switch (card->info.type) {
  92                 case QETH_CARD_TYPE_OSD:
  93                         return " Virtual NIC QDIO";
  94                 case QETH_CARD_TYPE_IQD:
  95                         return " Virtual NIC Hiper";
  96                 case QETH_CARD_TYPE_OSM:
  97                         return " Virtual NIC QDIO - OSM";
  98                 case QETH_CARD_TYPE_OSX:
  99                         return " Virtual NIC QDIO - OSX";
 100                 default:
 101                         return " unknown";
 102                 }
 103         } else {
 104                 switch (card->info.type) {
 105                 case QETH_CARD_TYPE_OSD:
 106                         return " OSD Express";
 107                 case QETH_CARD_TYPE_IQD:
 108                         return " HiperSockets";
 109                 case QETH_CARD_TYPE_OSN:
 110                         return " OSN QDIO";
 111                 case QETH_CARD_TYPE_OSM:
 112                         return " OSM QDIO";
 113                 case QETH_CARD_TYPE_OSX:
 114                         return " OSX QDIO";
 115                 default:
 116                         return " unknown";
 117                 }
 118         }
 119         return " n/a";
 120 }
 121
 122 /* max length to be returned: 14 */
 123 const char *qeth_get_cardname_short(struct qeth_card *card)
 124 {
 125         if (IS_VM_NIC(card)) {
 126                 switch (card->info.type) {
 127                 case QETH_CARD_TYPE_OSD:
 128                         return "Virt.NIC QDIO";
 129                 case QETH_CARD_TYPE_IQD:
 130                         return "Virt.NIC Hiper";
 131                 case QETH_CARD_TYPE_OSM:
 132                         return "Virt.NIC OSM";
 133                 case QETH_CARD_TYPE_OSX:
 134                         return "Virt.NIC OSX";
 135                 default:
 136                         return "unknown";
 137                 }
 138         } else {
 139                 switch (card->info.type) {
 140                 case QETH_CARD_TYPE_OSD:
 141                         switch (card->info.link_type) {
 142                         case QETH_LINK_TYPE_FAST_ETH:
 143                                 return "OSD_100";
 144                         case QETH_LINK_TYPE_HSTR:
 145                                 return "HSTR";
 146                         case QETH_LINK_TYPE_GBIT_ETH:
 147                                 return "OSD_1000";
 148                         case QETH_LINK_TYPE_10GBIT_ETH:
 149                                 return "OSD_10GIG";
 150                         case QETH_LINK_TYPE_25GBIT_ETH:
 151                                 return "OSD_25GIG";
 152                         case QETH_LINK_TYPE_LANE_ETH100:
 153                                 return "OSD_FE_LANE";
 154                         case QETH_LINK_TYPE_LANE_TR:
 155                                 return "OSD_TR_LANE";
 156                         case QETH_LINK_TYPE_LANE_ETH1000:
 157                                 return "OSD_GbE_LANE";
 158                         case QETH_LINK_TYPE_LANE:
 159                                 return "OSD_ATM_LANE";
 160                         default:
 161                                 return "OSD_Express";
 162                         }
 163                 case QETH_CARD_TYPE_IQD:
 164                         return "HiperSockets";
 165                 case QETH_CARD_TYPE_OSN:
 166                         return "OSN";
 167                 case QETH_CARD_TYPE_OSM:
 168                         return "OSM_1000";
 169                 case QETH_CARD_TYPE_OSX:
 170                         return "OSX_10GIG";
 171                 default:
 172                         return "unknown";
 173                 }
 174         }
 175         return "n/a";
 176 }
 177
 178 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 179                          int clear_start_mask)
 180 {
 181         unsigned long flags;
 182
 183         spin_lock_irqsave(&card->thread_mask_lock, flags);
 184         card->thread_allowed_mask = threads;
 185         if (clear_start_mask)
 186                 card->thread_start_mask &= threads;
 187         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 188         wake_up(&card->wait_q);
 189 }
 190 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 191
 192 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 193 {
 194         unsigned long flags;
 195         int rc = 0;
 196
 197         spin_lock_irqsave(&card->thread_mask_lock, flags);
 198         rc = (card->thread_running_mask & threads);
 199         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 200         return rc;
 201 }
 202 EXPORT_SYMBOL_GPL(qeth_threads_running);
 203
 204 void qeth_clear_working_pool_list(struct qeth_card *card)
 205 {
 206         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 207         struct qeth_qdio_q *queue = card->qdio.in_q;
 208         unsigned int i;
 209
 210         QETH_CARD_TEXT(card, 5, "clwrklst");
 211         list_for_each_entry_safe(pool_entry, tmp,
 212                             &card->qdio.in_buf_pool.entry_list, list){
 213                         list_del(&pool_entry->list);
 214         }
 215
 216         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 217                 queue->bufs[i].pool_entry = NULL;
 218 }
 219 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 220
 221 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 222 {
 223         unsigned int i;
 224
 225         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 226                 if (entry->elements[i])
 227                         __free_page(entry->elements[i]);
 228         }
 229
 230         kfree(entry);
 231 }
 232
 233 static void qeth_free_buffer_pool(struct qeth_card *card)
 234 {
 235         struct qeth_buffer_pool_entry *entry, *tmp;
 236
 237         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 238                                  init_list) {
 239                 list_del(&entry->init_list);
 240                 qeth_free_pool_entry(entry);
 241         }
 242 }
 243
 244 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 245 {
 246         struct qeth_buffer_pool_entry *entry;
 247         unsigned int i;
 248
 249         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 250         if (!entry)
 251                 return NULL;
 252
 253         for (i = 0; i < pages; i++) {
 254                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 255
 256                 if (!entry->elements[i]) {
 257                         qeth_free_pool_entry(entry);
 258                         return NULL;
 259                 }
 260         }
 261
 262         return entry;
 263 }
 264
 265 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 266 {
 267         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 268         unsigned int i;
 269
 270         QETH_CARD_TEXT(card, 5, "alocpool");
 271         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 272                 struct qeth_buffer_pool_entry *entry;
 273
 274                 entry = qeth_alloc_pool_entry(buf_elements);
 275                 if (!entry) {
 276                         qeth_free_buffer_pool(card);
 277                         return -ENOMEM;
 278                 }
 279
 280                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 281         }
 282         return 0;
 283 }
 284
 285 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 286 {
 287         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 288         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 289         struct qeth_buffer_pool_entry *entry, *tmp;
 290         int delta = count - pool->buf_count;
 291         LIST_HEAD(entries);
 292
 293         QETH_CARD_TEXT(card, 2, "realcbp");
 294
 295         /* Defer until queue is allocated: */
 296         if (!card->qdio.in_q)
 297                 goto out;
 298
 299         /* Remove entries from the pool: */
 300         while (delta < 0) {
 301                 entry = list_first_entry(&pool->entry_list,
 302                                          struct qeth_buffer_pool_entry,
 303                                          init_list);
 304                 list_del(&entry->init_list);
 305                 qeth_free_pool_entry(entry);
 306
 307                 delta++;
 308         }
 309
 310         /* Allocate additional entries: */
 311         while (delta > 0) {
 312                 entry = qeth_alloc_pool_entry(buf_elements);
 313                 if (!entry) {
 314                         list_for_each_entry_safe(entry, tmp, &entries,
 315                                                  init_list) {
 316                                 list_del(&entry->init_list);
 317                                 qeth_free_pool_entry(entry);
 318                         }
 319
 320                         return -ENOMEM;
 321                 }
 322
 323                 list_add(&entry->init_list, &entries);
 324
 325                 delta--;
 326         }
 327
 328         list_splice(&entries, &pool->entry_list);
 329
 330 out:
 331         card->qdio.in_buf_pool.buf_count = count;
 332         pool->buf_count = count;
 333         return 0;
 334 }
 335 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 336
 337 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 338 {
 339         if (!q)
 340                 return;
 341
 342         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 343         kfree(q);
 344 }
 345
 346 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 347 {
 348         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 349         int i;
 350
 351         if (!q)
 352                 return NULL;
 353
 354         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 355                 kfree(q);
 356                 return NULL;
 357         }
 358
 359         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 360                 q->bufs[i].buffer = q->qdio_bufs[i];
 361
 362         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 363         return q;
 364 }
 365
 366 static int qeth_cq_init(struct qeth_card *card)
 367 {
 368         int rc;
 369
 370         if (card->options.cq == QETH_CQ_ENABLED) {
 371                 QETH_CARD_TEXT(card, 2, "cqinit");
 372                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 373                                    QDIO_MAX_BUFFERS_PER_Q);
 374                 card->qdio.c_q->next_buf_to_init = 127;
 375                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 376                              card->qdio.no_in_queues - 1, 0,
 377                              127);
 378                 if (rc) {
 379                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 380                         goto out;
 381                 }
 382         }
 383         rc = 0;
 384 out:
 385         return rc;
 386 }
 387
 388 static int qeth_alloc_cq(struct qeth_card *card)
 389 {
 390         int rc;
 391
 392         if (card->options.cq == QETH_CQ_ENABLED) {
 393                 int i;
 394                 struct qdio_outbuf_state *outbuf_states;
 395
 396                 QETH_CARD_TEXT(card, 2, "cqon");
 397                 card->qdio.c_q = qeth_alloc_qdio_queue();
 398                 if (!card->qdio.c_q) {
 399                         rc = -1;
 400                         goto kmsg_out;
 401                 }
 402                 card->qdio.no_in_queues = 2;
 403                 card->qdio.out_bufstates =
 404                         kcalloc(card->qdio.no_out_queues *
 405                                         QDIO_MAX_BUFFERS_PER_Q,
 406                                 sizeof(struct qdio_outbuf_state),
 407                                 GFP_KERNEL);
 408                 outbuf_states = card->qdio.out_bufstates;
 409                 if (outbuf_states == NULL) {
 410                         rc = -1;
 411                         goto free_cq_out;
 412                 }
 413                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 414                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 415                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 416                 }
 417         } else {
 418                 QETH_CARD_TEXT(card, 2, "nocq");
 419                 card->qdio.c_q = NULL;
 420                 card->qdio.no_in_queues = 1;
 421         }
 422         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 423         rc = 0;
 424 out:
 425         return rc;
 426 free_cq_out:
 427         qeth_free_qdio_queue(card->qdio.c_q);
 428         card->qdio.c_q = NULL;
 429 kmsg_out:
 430         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 431         goto out;
 432 }
 433
 434 static void qeth_free_cq(struct qeth_card *card)
 435 {
 436         if (card->qdio.c_q) {
 437                 --card->qdio.no_in_queues;
 438                 qeth_free_qdio_queue(card->qdio.c_q);
 439                 card->qdio.c_q = NULL;
 440         }
 441         kfree(card->qdio.out_bufstates);
 442         card->qdio.out_bufstates = NULL;
 443 }
 444
 445 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 446                                                         int delayed)
 447 {
 448         enum iucv_tx_notify n;
 449
 450         switch (sbalf15) {
 451         case 0:
 452                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 453                 break;
 454         case 4:
 455         case 16:
 456         case 17:
 457         case 18:
 458                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 459                         TX_NOTIFY_UNREACHABLE;
 460                 break;
 461         default:
 462                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 463                         TX_NOTIFY_GENERALERROR;
 464                 break;
 465         }
 466
 467         return n;
 468 }
 469
 470 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 471                                          int forced_cleanup)
 472 {
 473         if (q->card->options.cq != QETH_CQ_ENABLED)
 474                 return;
 475
 476         if (q->bufs[bidx]->next_pending != NULL) {
 477                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 478                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 479
 480                 while (c) {
 481                         if (forced_cleanup ||
 482                             atomic_read(&c->state) ==
 483                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 484                                 struct qeth_qdio_out_buffer *f = c;
 485                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 486                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 487                                 /* release here to avoid interleaving between
 488                                    outbound tasklet and inbound tasklet
 489                                    regarding notifications and lifecycle */
 490                                 qeth_tx_complete_buf(c, forced_cleanup, 0);
 491
 492                                 c = f->next_pending;
 493                                 WARN_ON_ONCE(head->next_pending != f);
 494                                 head->next_pending = c;
 495                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 496                         } else {
 497                                 head = c;
 498                                 c = c->next_pending;
 499                         }
 500
 501                 }
 502         }
 503         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 504                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 505                 /* for recovery situations */
 506                 qeth_init_qdio_out_buf(q, bidx);
 507                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 508         }
 509 }
 510
 511
 512 static void qeth_qdio_handle_aob(struct qeth_card *card,
 513                                  unsigned long phys_aob_addr)
 514 {
 515         struct qaob *aob;
 516         struct qeth_qdio_out_buffer *buffer;
 517         enum iucv_tx_notify notification;
 518         unsigned int i;
 519
 520         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 521         QETH_CARD_TEXT(card, 5, "haob");
 522         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 523         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 524         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 525
 526         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 527                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 528                 notification = TX_NOTIFY_OK;
 529         } else {
 530                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 531                                                         QETH_QDIO_BUF_PENDING);
 532                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 533                 notification = TX_NOTIFY_DELAYED_OK;
 534         }
 535
 536         if (aob->aorc != 0)  {
 537                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 538                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 539         }
 540         qeth_notify_skbs(buffer->q, buffer, notification);
 541
 542         /* Free dangling allocations. The attached skbs are handled by
 543          * qeth_cleanup_handled_pending().
 544          */
 545         for (i = 0;
 546              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 547              i++) {
 548                 void *data = phys_to_virt(aob->sba[i]);
 549
 550                 if (data && buffer->is_header[i])
 551                         kmem_cache_free(qeth_core_header_cache, data);
 552         }
 553         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 554
 555         qdio_release_aob(aob);
 556 }
 557
 558 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 559                            void *data)
 560 {
 561         ccw->cmd_code = cmd_code;
 562         ccw->flags = flags | CCW_FLAG_SLI;
 563         ccw->count = len;
 564         ccw->cda = (__u32) __pa(data);
 565 }
 566
 567 static int __qeth_issue_next_read(struct qeth_card *card)
 568 {
 569         struct qeth_cmd_buffer *iob = card->read_cmd;
 570         struct qeth_channel *channel = iob->channel;
 571         struct ccw1 *ccw = __ccw_from_cmd(iob);
 572         int rc;
 573
 574         QETH_CARD_TEXT(card, 5, "issnxrd");
 575         if (channel->state != CH_STATE_UP)
 576                 return -EIO;
 577
 578         memset(iob->data, 0, iob->length);
 579         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 580         iob->callback = qeth_issue_next_read_cb;
 581         /* keep the cmd alive after completion: */
 582         qeth_get_cmd(iob);
 583
 584         QETH_CARD_TEXT(card, 6, "noirqpnd");
 585         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 586         if (!rc) {
 587                 channel->active_cmd = iob;
 588         } else {
 589                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 590                                  rc, CARD_DEVID(card));
 591                 qeth_unlock_channel(card, channel);
 592                 qeth_put_cmd(iob);
 593                 card->read_or_write_problem = 1;
 594                 qeth_schedule_recovery(card);
 595         }
 596         return rc;
 597 }
 598
 599 static int qeth_issue_next_read(struct qeth_card *card)
 600 {
 601         int ret;
 602
 603         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 604         ret = __qeth_issue_next_read(card);
 605         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 606
 607         return ret;
 608 }
 609
 610 static void qeth_enqueue_cmd(struct qeth_card *card,
 611                              struct qeth_cmd_buffer *iob)
 612 {
 613         spin_lock_irq(&card->lock);
 614         list_add_tail(&iob->list, &card->cmd_waiter_list);
 615         spin_unlock_irq(&card->lock);
 616 }
 617
 618 static void qeth_dequeue_cmd(struct qeth_card *card,
 619                              struct qeth_cmd_buffer *iob)
 620 {
 621         spin_lock_irq(&card->lock);
 622         list_del(&iob->list);
 623         spin_unlock_irq(&card->lock);
 624 }
 625
 626 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 627 {
 628         iob->rc = reason;
 629         complete(&iob->done);
 630 }
 631 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 632
 633 static void qeth_flush_local_addrs4(struct qeth_card *card)
 634 {
 635         struct qeth_local_addr *addr;
 636         struct hlist_node *tmp;
 637         unsigned int i;
 638
 639         spin_lock_irq(&card->local_addrs4_lock);
 640         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 641                 hash_del_rcu(&addr->hnode);
 642                 kfree_rcu(addr, rcu);
 643         }
 644         spin_unlock_irq(&card->local_addrs4_lock);
 645 }
 646
 647 static void qeth_flush_local_addrs6(struct qeth_card *card)
 648 {
 649         struct qeth_local_addr *addr;
 650         struct hlist_node *tmp;
 651         unsigned int i;
 652
 653         spin_lock_irq(&card->local_addrs6_lock);
 654         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 655                 hash_del_rcu(&addr->hnode);
 656                 kfree_rcu(addr, rcu);
 657         }
 658         spin_unlock_irq(&card->local_addrs6_lock);
 659 }
 660
 661 void qeth_flush_local_addrs(struct qeth_card *card)
 662 {
 663         qeth_flush_local_addrs4(card);
 664         qeth_flush_local_addrs6(card);
 665 }
 666 EXPORT_SYMBOL_GPL(qeth_flush_local_addrs);
 667
 668 static void qeth_add_local_addrs4(struct qeth_card *card,
 669                                   struct qeth_ipacmd_local_addrs4 *cmd)
 670 {
 671         unsigned int i;
 672
 673         if (cmd->addr_length !=
 674             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 675                 dev_err_ratelimited(&card->gdev->dev,
 676                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 677                                     cmd->addr_length);
 678                 return;
 679         }
 680
 681         spin_lock(&card->local_addrs4_lock);
 682         for (i = 0; i < cmd->count; i++) {
 683                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 684                 struct qeth_local_addr *addr;
 685                 bool duplicate = false;
 686
 687                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 688                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 689                                 duplicate = true;
 690                                 break;
 691                         }
 692                 }
 693
 694                 if (duplicate)
 695                         continue;
 696
 697                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 698                 if (!addr) {
 699                         dev_err(&card->gdev->dev,
 700                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 701                                 &cmd->addrs[i].addr);
 702                         continue;
 703                 }
 704
 705                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 706                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 707         }
 708         spin_unlock(&card->local_addrs4_lock);
 709 }
 710
 711 static void qeth_add_local_addrs6(struct qeth_card *card,
 712                                   struct qeth_ipacmd_local_addrs6 *cmd)
 713 {
 714         unsigned int i;
 715
 716         if (cmd->addr_length !=
 717             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 718                 dev_err_ratelimited(&card->gdev->dev,
 719                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 720                                     cmd->addr_length);
 721                 return;
 722         }
 723
 724         spin_lock(&card->local_addrs6_lock);
 725         for (i = 0; i < cmd->count; i++) {
 726                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 727                 struct qeth_local_addr *addr;
 728                 bool duplicate = false;
 729
 730                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 731                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 732                                 duplicate = true;
 733                                 break;
 734                         }
 735                 }
 736
 737                 if (duplicate)
 738                         continue;
 739
 740                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 741                 if (!addr) {
 742                         dev_err(&card->gdev->dev,
 743                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 744                                 &cmd->addrs[i].addr);
 745                         continue;
 746                 }
 747
 748                 addr->addr = cmd->addrs[i].addr;
 749                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 750         }
 751         spin_unlock(&card->local_addrs6_lock);
 752 }
 753
 754 static void qeth_del_local_addrs4(struct qeth_card *card,
 755                                   struct qeth_ipacmd_local_addrs4 *cmd)
 756 {
 757         unsigned int i;
 758
 759         if (cmd->addr_length !=
 760             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 761                 dev_err_ratelimited(&card->gdev->dev,
 762                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 763                                     cmd->addr_length);
 764                 return;
 765         }
 766
 767         spin_lock(&card->local_addrs4_lock);
 768         for (i = 0; i < cmd->count; i++) {
 769                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 770                 unsigned int key = ipv4_addr_hash(addr->addr);
 771                 struct qeth_local_addr *tmp;
 772
 773                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 774                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 775                                 hash_del_rcu(&tmp->hnode);
 776                                 kfree_rcu(tmp, rcu);
 777                                 break;
 778                         }
 779                 }
 780         }
 781         spin_unlock(&card->local_addrs4_lock);
 782 }
 783
 784 static void qeth_del_local_addrs6(struct qeth_card *card,
 785                                   struct qeth_ipacmd_local_addrs6 *cmd)
 786 {
 787         unsigned int i;
 788
 789         if (cmd->addr_length !=
 790             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 791                 dev_err_ratelimited(&card->gdev->dev,
 792                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 793                                     cmd->addr_length);
 794                 return;
 795         }
 796
 797         spin_lock(&card->local_addrs6_lock);
 798         for (i = 0; i < cmd->count; i++) {
 799                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 800                 u32 key = ipv6_addr_hash(&addr->addr);
 801                 struct qeth_local_addr *tmp;
 802
 803                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 804                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 805                                 hash_del_rcu(&tmp->hnode);
 806                                 kfree_rcu(tmp, rcu);
 807                                 break;
 808                         }
 809                 }
 810         }
 811         spin_unlock(&card->local_addrs6_lock);
 812 }
 813
 814 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 815                                       struct sk_buff *skb)
 816 {
 817         struct qeth_local_addr *tmp;
 818         bool is_local = false;
 819         unsigned int key;
 820         __be32 next_hop;
 821
 822         if (hash_empty(card->local_addrs4))
 823                 return false;
 824
 825         rcu_read_lock();
 826         next_hop = qeth_next_hop_v4_rcu(skb, qeth_dst_check_rcu(skb, 4));
 827         key = ipv4_addr_hash(next_hop);
 828
 829         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 830                 if (tmp->addr.s6_addr32[3] == next_hop) {
 831                         is_local = true;
 832                         break;
 833                 }
 834         }
 835         rcu_read_unlock();
 836
 837         return is_local;
 838 }
 839
 840 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 841                                       struct sk_buff *skb)
 842 {
 843         struct qeth_local_addr *tmp;
 844         struct in6_addr *next_hop;
 845         bool is_local = false;
 846         u32 key;
 847
 848         if (hash_empty(card->local_addrs6))
 849                 return false;
 850
 851         rcu_read_lock();
 852         next_hop = qeth_next_hop_v6_rcu(skb, qeth_dst_check_rcu(skb, 6));
 853         key = ipv6_addr_hash(next_hop);
 854
 855         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 856                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 857                         is_local = true;
 858                         break;
 859                 }
 860         }
 861         rcu_read_unlock();
 862
 863         return is_local;
 864 }
 865
 866 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 867 {
 868         struct qeth_card *card = m->private;
 869         struct qeth_local_addr *tmp;
 870         unsigned int i;
 871
 872         rcu_read_lock();
 873         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 874                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 875         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 876                 seq_printf(m, "%pI6c\n", &tmp->addr);
 877         rcu_read_unlock();
 878
 879         return 0;
 880 }
 881
 882 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 883
 884 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 885                 struct qeth_card *card)
 886 {
 887         const char *ipa_name;
 888         int com = cmd->hdr.command;
 889         ipa_name = qeth_get_ipa_cmd_name(com);
 890
 891         if (rc)
 892                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 893                                  ipa_name, com, CARD_DEVID(card), rc,
 894                                  qeth_get_ipa_msg(rc));
 895         else
 896                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 897                                  ipa_name, com, CARD_DEVID(card));
 898 }
 899
 900 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 901                                                 struct qeth_ipa_cmd *cmd)
 902 {
 903         QETH_CARD_TEXT(card, 5, "chkipad");
 904
 905         if (IS_IPA_REPLY(cmd)) {
 906                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 907                     cmd->hdr.command != IPA_CMD_DELCCID &&
 908                     cmd->hdr.command != IPA_CMD_MODCCID &&
 909                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 910                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 911                 return cmd;
 912         }
 913
 914         /* handle unsolicited event: */
 915         switch (cmd->hdr.command) {
 916         case IPA_CMD_STOPLAN:
 917                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 918                         dev_err(&card->gdev->dev,
 919                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 920                                 QETH_CARD_IFNAME(card));
 921                         schedule_work(&card->close_dev_work);
 922                 } else {
 923                         dev_warn(&card->gdev->dev,
 924                                  "The link for interface %s on CHPID 0x%X failed\n",
 925                                  QETH_CARD_IFNAME(card), card->info.chpid);
 926                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 927                         netif_carrier_off(card->dev);
 928                 }
 929                 return NULL;
 930         case IPA_CMD_STARTLAN:
 931                 dev_info(&card->gdev->dev,
 932                          "The link for %s on CHPID 0x%X has been restored\n",
 933                          QETH_CARD_IFNAME(card), card->info.chpid);
 934                 if (card->info.hwtrap)
 935                         card->info.hwtrap = 2;
 936                 qeth_schedule_recovery(card);
 937                 return NULL;
 938         case IPA_CMD_SETBRIDGEPORT_IQD:
 939         case IPA_CMD_SETBRIDGEPORT_OSA:
 940         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 941                 if (card->discipline->control_event_handler(card, cmd))
 942                         return cmd;
 943                 return NULL;
 944         case IPA_CMD_MODCCID:
 945                 return cmd;
 946         case IPA_CMD_REGISTER_LOCAL_ADDR:
 947                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 948                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 949                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 950                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 951
 952                 QETH_CARD_TEXT(card, 3, "irla");
 953                 return NULL;
 954         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 955                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 956                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 957                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 958                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 959
 960                 QETH_CARD_TEXT(card, 3, "urla");
 961                 return NULL;
 962         default:
 963                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 964                 return cmd;
 965         }
 966 }
 967
 968 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 969 {
 970         struct qeth_cmd_buffer *iob;
 971         unsigned long flags;
 972
 973         QETH_CARD_TEXT(card, 4, "clipalst");
 974
 975         spin_lock_irqsave(&card->lock, flags);
 976         list_for_each_entry(iob, &card->cmd_waiter_list, list)
 977                 qeth_notify_cmd(iob, -ECANCELED);
 978         spin_unlock_irqrestore(&card->lock, flags);
 979 }
 980
 981 static int qeth_check_idx_response(struct qeth_card *card,
 982         unsigned char *buffer)
 983 {
 984         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 985         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 986                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 987                                  buffer[4]);
 988                 QETH_CARD_TEXT(card, 2, "ckidxres");
 989                 QETH_CARD_TEXT(card, 2, " idxterm");
 990                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 991                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 992                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 993                         dev_err(&card->gdev->dev,
 994                                 "The device does not support the configured transport mode\n");
 995                         return -EPROTONOSUPPORT;
 996                 }
 997                 return -EIO;
 998         }
 999         return 0;
1000 }
1001
1002 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1003 {
1004         if (refcount_dec_and_test(&iob->ref_count)) {
1005                 kfree(iob->data);
1006                 kfree(iob);
1007         }
1008 }
1009 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1010
1011 static void qeth_release_buffer_cb(struct qeth_card *card,
1012                                    struct qeth_cmd_buffer *iob,
1013                                    unsigned int data_length)
1014 {
1015         qeth_put_cmd(iob);
1016 }
1017
1018 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1019 {
1020         qeth_notify_cmd(iob, rc);
1021         qeth_put_cmd(iob);
1022 }
1023
1024 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1025                                        unsigned int length, unsigned int ccws,
1026                                        long timeout)
1027 {
1028         struct qeth_cmd_buffer *iob;
1029
1030         if (length > QETH_BUFSIZE)
1031                 return NULL;
1032
1033         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1034         if (!iob)
1035                 return NULL;
1036
1037         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1038                             GFP_KERNEL | GFP_DMA);
1039         if (!iob->data) {
1040                 kfree(iob);
1041                 return NULL;
1042         }
1043
1044         init_completion(&iob->done);
1045         spin_lock_init(&iob->lock);
1046         INIT_LIST_HEAD(&iob->list);
1047         refcount_set(&iob->ref_count, 1);
1048         iob->channel = channel;
1049         iob->timeout = timeout;
1050         iob->length = length;
1051         return iob;
1052 }
1053 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1054
1055 static void qeth_issue_next_read_cb(struct qeth_card *card,
1056                                     struct qeth_cmd_buffer *iob,
1057                                     unsigned int data_length)
1058 {
1059         struct qeth_cmd_buffer *request = NULL;
1060         struct qeth_ipa_cmd *cmd = NULL;
1061         struct qeth_reply *reply = NULL;
1062         struct qeth_cmd_buffer *tmp;
1063         unsigned long flags;
1064         int rc = 0;
1065
1066         QETH_CARD_TEXT(card, 4, "sndctlcb");
1067         rc = qeth_check_idx_response(card, iob->data);
1068         switch (rc) {
1069         case 0:
1070                 break;
1071         case -EIO:
1072                 qeth_schedule_recovery(card);
1073                 fallthrough;
1074         default:
1075                 qeth_clear_ipacmd_list(card);
1076                 goto err_idx;
1077         }
1078
1079         cmd = __ipa_reply(iob);
1080         if (cmd) {
1081                 cmd = qeth_check_ipa_data(card, cmd);
1082                 if (!cmd)
1083                         goto out;
1084                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1085                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1086                         card->osn_info.assist_cb(card->dev, cmd);
1087                         goto out;
1088                 }
1089         }
1090
1091         /* match against pending cmd requests */
1092         spin_lock_irqsave(&card->lock, flags);
1093         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1094                 if (tmp->match && tmp->match(tmp, iob)) {
1095                         request = tmp;
1096                         /* take the object outside the lock */
1097                         qeth_get_cmd(request);
1098                         break;
1099                 }
1100         }
1101         spin_unlock_irqrestore(&card->lock, flags);
1102
1103         if (!request)
1104                 goto out;
1105
1106         reply = &request->reply;
1107         if (!reply->callback) {
1108                 rc = 0;
1109                 goto no_callback;
1110         }
1111
1112         spin_lock_irqsave(&request->lock, flags);
1113         if (request->rc)
1114                 /* Bail out when the requestor has already left: */
1115                 rc = request->rc;
1116         else
1117                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1118                                                         (unsigned long)iob);
1119         spin_unlock_irqrestore(&request->lock, flags);
1120
1121 no_callback:
1122         if (rc <= 0)
1123                 qeth_notify_cmd(request, rc);
1124         qeth_put_cmd(request);
1125 out:
1126         memcpy(&card->seqno.pdu_hdr_ack,
1127                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1128                 QETH_SEQ_NO_LENGTH);
1129         __qeth_issue_next_read(card);
1130 err_idx:
1131         qeth_put_cmd(iob);
1132 }
1133
1134 static int qeth_set_thread_start_bit(struct qeth_card *card,
1135                 unsigned long thread)
1136 {
1137         unsigned long flags;
1138         int rc = 0;
1139
1140         spin_lock_irqsave(&card->thread_mask_lock, flags);
1141         if (!(card->thread_allowed_mask & thread))
1142                 rc = -EPERM;
1143         else if (card->thread_start_mask & thread)
1144                 rc = -EBUSY;
1145         else
1146                 card->thread_start_mask |= thread;
1147         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1148
1149         return rc;
1150 }
1151
1152 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1153                                         unsigned long thread)
1154 {
1155         unsigned long flags;
1156
1157         spin_lock_irqsave(&card->thread_mask_lock, flags);
1158         card->thread_start_mask &= ~thread;
1159         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1160         wake_up(&card->wait_q);
1161 }
1162
1163 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1164                                           unsigned long thread)
1165 {
1166         unsigned long flags;
1167
1168         spin_lock_irqsave(&card->thread_mask_lock, flags);
1169         card->thread_running_mask &= ~thread;
1170         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1171         wake_up_all(&card->wait_q);
1172 }
1173
1174 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1175 {
1176         unsigned long flags;
1177         int rc = 0;
1178
1179         spin_lock_irqsave(&card->thread_mask_lock, flags);
1180         if (card->thread_start_mask & thread) {
1181                 if ((card->thread_allowed_mask & thread) &&
1182                     !(card->thread_running_mask & thread)) {
1183                         rc = 1;
1184                         card->thread_start_mask &= ~thread;
1185                         card->thread_running_mask |= thread;
1186                 } else
1187                         rc = -EPERM;
1188         }
1189         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1190         return rc;
1191 }
1192
1193 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1194 {
1195         int rc = 0;
1196
1197         wait_event(card->wait_q,
1198                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1199         return rc;
1200 }
1201
1202 int qeth_schedule_recovery(struct qeth_card *card)
1203 {
1204         int rc;
1205
1206         QETH_CARD_TEXT(card, 2, "startrec");
1207
1208         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1209         if (!rc)
1210                 schedule_work(&card->kernel_thread_starter);
1211
1212         return rc;
1213 }
1214
1215 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1216                             struct irb *irb)
1217 {
1218         int dstat, cstat;
1219         char *sense;
1220
1221         sense = (char *) irb->ecw;
1222         cstat = irb->scsw.cmd.cstat;
1223         dstat = irb->scsw.cmd.dstat;
1224
1225         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1226                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1227                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1228                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1229                 dev_warn(&cdev->dev, "The qeth device driver "
1230                         "failed to recover an error on the device\n");
1231                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1232                                  CCW_DEVID(cdev), dstat, cstat);
1233                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1234                                 16, 1, irb, 64, 1);
1235                 return -EIO;
1236         }
1237
1238         if (dstat & DEV_STAT_UNIT_CHECK) {
1239                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1240                     SENSE_RESETTING_EVENT_FLAG) {
1241                         QETH_CARD_TEXT(card, 2, "REVIND");
1242                         return -EIO;
1243                 }
1244                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1245                     SENSE_COMMAND_REJECT_FLAG) {
1246                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1247                         return -EIO;
1248                 }
1249                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1250                         QETH_CARD_TEXT(card, 2, "AFFE");
1251                         return -EIO;
1252                 }
1253                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1254                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1255                         return 0;
1256                 }
1257                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1258                         return -EIO;
1259         }
1260         return 0;
1261 }
1262
1263 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1264                                 struct irb *irb)
1265 {
1266         if (!IS_ERR(irb))
1267                 return 0;
1268
1269         switch (PTR_ERR(irb)) {
1270         case -EIO:
1271                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1272                                  CCW_DEVID(cdev));
1273                 QETH_CARD_TEXT(card, 2, "ckirberr");
1274                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1275                 return -EIO;
1276         case -ETIMEDOUT:
1277                 dev_warn(&cdev->dev, "A hardware operation timed out"
1278                         " on the device\n");
1279                 QETH_CARD_TEXT(card, 2, "ckirberr");
1280                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1281                 return -ETIMEDOUT;
1282         default:
1283                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1284                                  PTR_ERR(irb), CCW_DEVID(cdev));
1285                 QETH_CARD_TEXT(card, 2, "ckirberr");
1286                 QETH_CARD_TEXT(card, 2, "  rc???");
1287                 return PTR_ERR(irb);
1288         }
1289 }
1290
1291 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1292                 struct irb *irb)
1293 {
1294         int rc;
1295         int cstat, dstat;
1296         struct qeth_cmd_buffer *iob = NULL;
1297         struct ccwgroup_device *gdev;
1298         struct qeth_channel *channel;
1299         struct qeth_card *card;
1300
1301         /* while we hold the ccwdev lock, this stays valid: */
1302         gdev = dev_get_drvdata(&cdev->dev);
1303         card = dev_get_drvdata(&gdev->dev);
1304
1305         QETH_CARD_TEXT(card, 5, "irq");
1306
1307         if (card->read.ccwdev == cdev) {
1308                 channel = &card->read;
1309                 QETH_CARD_TEXT(card, 5, "read");
1310         } else if (card->write.ccwdev == cdev) {
1311                 channel = &card->write;
1312                 QETH_CARD_TEXT(card, 5, "write");
1313         } else {
1314                 channel = &card->data;
1315                 QETH_CARD_TEXT(card, 5, "data");
1316         }
1317
1318         if (intparm == 0) {
1319                 QETH_CARD_TEXT(card, 5, "irqunsol");
1320         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1321                 QETH_CARD_TEXT(card, 5, "irqunexp");
1322
1323                 dev_err(&cdev->dev,
1324                         "Received IRQ with intparm %lx, expected %px\n",
1325                         intparm, channel->active_cmd);
1326                 if (channel->active_cmd)
1327                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1328         } else {
1329                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1330         }
1331
1332         channel->active_cmd = NULL;
1333         qeth_unlock_channel(card, channel);
1334
1335         rc = qeth_check_irb_error(card, cdev, irb);
1336         if (rc) {
1337                 /* IO was terminated, free its resources. */
1338                 if (iob)
1339                         qeth_cancel_cmd(iob, rc);
1340                 return;
1341         }
1342
1343         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1344                 channel->state = CH_STATE_STOPPED;
1345                 wake_up(&card->wait_q);
1346         }
1347
1348         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1349                 channel->state = CH_STATE_HALTED;
1350                 wake_up(&card->wait_q);
1351         }
1352
1353         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1354                                           SCSW_FCTL_HALT_FUNC))) {
1355                 qeth_cancel_cmd(iob, -ECANCELED);
1356                 iob = NULL;
1357         }
1358
1359         cstat = irb->scsw.cmd.cstat;
1360         dstat = irb->scsw.cmd.dstat;
1361
1362         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1363             (dstat & DEV_STAT_UNIT_CHECK) ||
1364             (cstat)) {
1365                 if (irb->esw.esw0.erw.cons) {
1366                         dev_warn(&channel->ccwdev->dev,
1367                                 "The qeth device driver failed to recover "
1368                                 "an error on the device\n");
1369                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1370                                          CCW_DEVID(channel->ccwdev), cstat,
1371                                          dstat);
1372                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1373                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1374                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1375                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1376                 }
1377
1378                 rc = qeth_get_problem(card, cdev, irb);
1379                 if (rc) {
1380                         card->read_or_write_problem = 1;
1381                         if (iob)
1382                                 qeth_cancel_cmd(iob, rc);
1383                         qeth_clear_ipacmd_list(card);
1384                         qeth_schedule_recovery(card);
1385                         return;
1386                 }
1387         }
1388
1389         if (iob) {
1390                 /* sanity check: */
1391                 if (irb->scsw.cmd.count > iob->length) {
1392                         qeth_cancel_cmd(iob, -EIO);
1393                         return;
1394                 }
1395                 if (iob->callback)
1396                         iob->callback(card, iob,
1397                                       iob->length - irb->scsw.cmd.count);
1398         }
1399 }
1400
1401 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1402                 struct qeth_qdio_out_buffer *buf,
1403                 enum iucv_tx_notify notification)
1404 {
1405         struct sk_buff *skb;
1406
1407         skb_queue_walk(&buf->skb_list, skb) {
1408                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1409                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1410                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1411                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1412         }
1413 }
1414
1415 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1416                                  int budget)
1417 {
1418         struct qeth_qdio_out_q *queue = buf->q;
1419         struct sk_buff *skb;
1420
1421         /* release may never happen from within CQ tasklet scope */
1422         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1423
1424         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1425                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1426
1427         /* Empty buffer? */
1428         if (buf->next_element_to_fill == 0)
1429                 return;
1430
1431         QETH_TXQ_STAT_INC(queue, bufs);
1432         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1433         if (error) {
1434                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1435         } else {
1436                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1437                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1438         }
1439
1440         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1441                 unsigned int bytes = qdisc_pkt_len(skb);
1442                 bool is_tso = skb_is_gso(skb);
1443                 unsigned int packets;
1444
1445                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1446                 if (!error) {
1447                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1448                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1449                         if (skb_is_nonlinear(skb))
1450                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1451                         if (is_tso) {
1452                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1453                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1454                         }
1455                 }
1456
1457                 napi_consume_skb(skb, budget);
1458         }
1459 }
1460
1461 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1462                                      struct qeth_qdio_out_buffer *buf,
1463                                      bool error, int budget)
1464 {
1465         int i;
1466
1467         /* is PCI flag set on buffer? */
1468         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1469                 atomic_dec(&queue->set_pci_flags_count);
1470
1471         qeth_tx_complete_buf(buf, error, budget);
1472
1473         for (i = 0; i < queue->max_elements; ++i) {
1474                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1475
1476                 if (data && buf->is_header[i])
1477                         kmem_cache_free(qeth_core_header_cache, data);
1478                 buf->is_header[i] = 0;
1479         }
1480
1481         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1482         buf->next_element_to_fill = 0;
1483         buf->frames = 0;
1484         buf->bytes = 0;
1485         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1486 }
1487
1488 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1489 {
1490         int j;
1491
1492         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1493                 if (!q->bufs[j])
1494                         continue;
1495                 qeth_cleanup_handled_pending(q, j, 1);
1496                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1497                 if (free) {
1498                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1499                         q->bufs[j] = NULL;
1500                 }
1501         }
1502 }
1503
1504 void qeth_drain_output_queues(struct qeth_card *card)
1505 {
1506         int i;
1507
1508         QETH_CARD_TEXT(card, 2, "clearqdbf");
1509         /* clear outbound buffers to free skbs */
1510         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1511                 if (card->qdio.out_qs[i])
1512                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1513         }
1514 }
1515 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1516
1517 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1518 {
1519         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1520         unsigned int count;
1521         int rc;
1522
1523         count = IS_VM_NIC(card) ? min(max, card->dev->real_num_tx_queues) : max;
1524
1525         rtnl_lock();
1526         rc = netif_set_real_num_tx_queues(card->dev, count);
1527         rtnl_unlock();
1528
1529         if (rc)
1530                 return rc;
1531
1532         if (card->qdio.no_out_queues == max)
1533                 return 0;
1534
1535         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1536                 qeth_free_qdio_queues(card);
1537
1538         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1539                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1540
1541         card->qdio.no_out_queues = max;
1542         return 0;
1543 }
1544
1545 static int qeth_update_from_chp_desc(struct qeth_card *card)
1546 {
1547         struct ccw_device *ccwdev;
1548         struct channel_path_desc_fmt0 *chp_dsc;
1549         int rc = 0;
1550
1551         QETH_CARD_TEXT(card, 2, "chp_desc");
1552
1553         ccwdev = card->data.ccwdev;
1554         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1555         if (!chp_dsc)
1556                 return -ENOMEM;
1557
1558         card->info.func_level = 0x4100 + chp_dsc->desc;
1559
1560         if (IS_OSD(card) || IS_OSX(card))
1561                 /* CHPP field bit 6 == 1 -> single queue */
1562                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1563
1564         kfree(chp_dsc);
1565         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1566         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1567         return rc;
1568 }
1569
1570 static void qeth_init_qdio_info(struct qeth_card *card)
1571 {
1572         QETH_CARD_TEXT(card, 4, "intqdinf");
1573         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1574         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1575         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1576
1577         /* inbound */
1578         card->qdio.no_in_queues = 1;
1579         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1580         if (IS_IQD(card))
1581                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1582         else
1583                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1584         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1585         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1586         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1587 }
1588
1589 static void qeth_set_initial_options(struct qeth_card *card)
1590 {
1591         card->options.route4.type = NO_ROUTER;
1592         card->options.route6.type = NO_ROUTER;
1593         card->options.isolation = ISOLATION_MODE_NONE;
1594         card->options.cq = QETH_CQ_DISABLED;
1595         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1596 }
1597
1598 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1599 {
1600         unsigned long flags;
1601         int rc = 0;
1602
1603         spin_lock_irqsave(&card->thread_mask_lock, flags);
1604         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1605                         (u8) card->thread_start_mask,
1606                         (u8) card->thread_allowed_mask,
1607                         (u8) card->thread_running_mask);
1608         rc = (card->thread_start_mask & thread);
1609         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1610         return rc;
1611 }
1612
1613 static int qeth_do_reset(void *data);
1614 static void qeth_start_kernel_thread(struct work_struct *work)
1615 {
1616         struct task_struct *ts;
1617         struct qeth_card *card = container_of(work, struct qeth_card,
1618                                         kernel_thread_starter);
1619         QETH_CARD_TEXT(card , 2, "strthrd");
1620
1621         if (card->read.state != CH_STATE_UP &&
1622             card->write.state != CH_STATE_UP)
1623                 return;
1624         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1625                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1626                 if (IS_ERR(ts)) {
1627                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1628                         qeth_clear_thread_running_bit(card,
1629                                 QETH_RECOVER_THREAD);
1630                 }
1631         }
1632 }
1633
1634 static void qeth_buffer_reclaim_work(struct work_struct *);
1635 static void qeth_setup_card(struct qeth_card *card)
1636 {
1637         QETH_CARD_TEXT(card, 2, "setupcrd");
1638
1639         card->info.type = CARD_RDEV(card)->id.driver_info;
1640         card->state = CARD_STATE_DOWN;
1641         spin_lock_init(&card->lock);
1642         spin_lock_init(&card->thread_mask_lock);
1643         mutex_init(&card->conf_mutex);
1644         mutex_init(&card->discipline_mutex);
1645         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1646         INIT_LIST_HEAD(&card->cmd_waiter_list);
1647         init_waitqueue_head(&card->wait_q);
1648         qeth_set_initial_options(card);
1649         /* IP address takeover */
1650         INIT_LIST_HEAD(&card->ipato.entries);
1651         qeth_init_qdio_info(card);
1652         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1653         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1654         hash_init(card->rx_mode_addrs);
1655         hash_init(card->local_addrs4);
1656         hash_init(card->local_addrs6);
1657         spin_lock_init(&card->local_addrs4_lock);
1658         spin_lock_init(&card->local_addrs6_lock);
1659 }
1660
1661 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1662 {
1663         struct qeth_card *card = container_of(slr, struct qeth_card,
1664                                         qeth_service_level);
1665         if (card->info.mcl_level[0])
1666                 seq_printf(m, "qeth: %s firmware level %s\n",
1667                         CARD_BUS_ID(card), card->info.mcl_level);
1668 }
1669
1670 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1671 {
1672         struct qeth_card *card;
1673
1674         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1675         card = kzalloc(sizeof(*card), GFP_KERNEL);
1676         if (!card)
1677                 goto out;
1678         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1679
1680         card->gdev = gdev;
1681         dev_set_drvdata(&gdev->dev, card);
1682         CARD_RDEV(card) = gdev->cdev[0];
1683         CARD_WDEV(card) = gdev->cdev[1];
1684         CARD_DDEV(card) = gdev->cdev[2];
1685
1686         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1687                                                  dev_name(&gdev->dev));
1688         if (!card->event_wq)
1689                 goto out_wq;
1690
1691         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1692         if (!card->read_cmd)
1693                 goto out_read_cmd;
1694
1695         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1696                                            qeth_debugfs_root);
1697         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1698                             &qeth_debugfs_local_addr_fops);
1699
1700         card->qeth_service_level.seq_print = qeth_core_sl_print;
1701         register_service_level(&card->qeth_service_level);
1702         return card;
1703
1704 out_read_cmd:
1705         destroy_workqueue(card->event_wq);
1706 out_wq:
1707         dev_set_drvdata(&gdev->dev, NULL);
1708         kfree(card);
1709 out:
1710         return NULL;
1711 }
1712
1713 static int qeth_clear_channel(struct qeth_card *card,
1714                               struct qeth_channel *channel)
1715 {
1716         int rc;
1717
1718         QETH_CARD_TEXT(card, 3, "clearch");
1719         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1720         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1721         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1722
1723         if (rc)
1724                 return rc;
1725         rc = wait_event_interruptible_timeout(card->wait_q,
1726                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1727         if (rc == -ERESTARTSYS)
1728                 return rc;
1729         if (channel->state != CH_STATE_STOPPED)
1730                 return -ETIME;
1731         channel->state = CH_STATE_DOWN;
1732         return 0;
1733 }
1734
1735 static int qeth_halt_channel(struct qeth_card *card,
1736                              struct qeth_channel *channel)
1737 {
1738         int rc;
1739
1740         QETH_CARD_TEXT(card, 3, "haltch");
1741         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1742         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1743         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1744
1745         if (rc)
1746                 return rc;
1747         rc = wait_event_interruptible_timeout(card->wait_q,
1748                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1749         if (rc == -ERESTARTSYS)
1750                 return rc;
1751         if (channel->state != CH_STATE_HALTED)
1752                 return -ETIME;
1753         return 0;
1754 }
1755
1756 int qeth_stop_channel(struct qeth_channel *channel)
1757 {
1758         struct ccw_device *cdev = channel->ccwdev;
1759         int rc;
1760
1761         rc = ccw_device_set_offline(cdev);
1762
1763         spin_lock_irq(get_ccwdev_lock(cdev));
1764         if (channel->active_cmd) {
1765                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1766                         channel->active_cmd);
1767                 channel->active_cmd = NULL;
1768         }
1769         cdev->handler = NULL;
1770         spin_unlock_irq(get_ccwdev_lock(cdev));
1771
1772         return rc;
1773 }
1774 EXPORT_SYMBOL_GPL(qeth_stop_channel);
1775
1776 static int qeth_start_channel(struct qeth_channel *channel)
1777 {
1778         struct ccw_device *cdev = channel->ccwdev;
1779         int rc;
1780
1781         channel->state = CH_STATE_DOWN;
1782         atomic_set(&channel->irq_pending, 0);
1783
1784         spin_lock_irq(get_ccwdev_lock(cdev));
1785         cdev->handler = qeth_irq;
1786         spin_unlock_irq(get_ccwdev_lock(cdev));
1787
1788         rc = ccw_device_set_online(cdev);
1789         if (rc)
1790                 goto err;
1791
1792         return 0;
1793
1794 err:
1795         spin_lock_irq(get_ccwdev_lock(cdev));
1796         cdev->handler = NULL;
1797         spin_unlock_irq(get_ccwdev_lock(cdev));
1798         return rc;
1799 }
1800
1801 static int qeth_halt_channels(struct qeth_card *card)
1802 {
1803         int rc1 = 0, rc2 = 0, rc3 = 0;
1804
1805         QETH_CARD_TEXT(card, 3, "haltchs");
1806         rc1 = qeth_halt_channel(card, &card->read);
1807         rc2 = qeth_halt_channel(card, &card->write);
1808         rc3 = qeth_halt_channel(card, &card->data);
1809         if (rc1)
1810                 return rc1;
1811         if (rc2)
1812                 return rc2;
1813         return rc3;
1814 }
1815
1816 static int qeth_clear_channels(struct qeth_card *card)
1817 {
1818         int rc1 = 0, rc2 = 0, rc3 = 0;
1819
1820         QETH_CARD_TEXT(card, 3, "clearchs");
1821         rc1 = qeth_clear_channel(card, &card->read);
1822         rc2 = qeth_clear_channel(card, &card->write);
1823         rc3 = qeth_clear_channel(card, &card->data);
1824         if (rc1)
1825                 return rc1;
1826         if (rc2)
1827                 return rc2;
1828         return rc3;
1829 }
1830
1831 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1832 {
1833         int rc = 0;
1834
1835         QETH_CARD_TEXT(card, 3, "clhacrd");
1836
1837         if (halt)
1838                 rc = qeth_halt_channels(card);
1839         if (rc)
1840                 return rc;
1841         return qeth_clear_channels(card);
1842 }
1843
1844 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1845 {
1846         int rc = 0;
1847
1848         QETH_CARD_TEXT(card, 3, "qdioclr");
1849         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1850                 QETH_QDIO_CLEANING)) {
1851         case QETH_QDIO_ESTABLISHED:
1852                 if (IS_IQD(card))
1853                         rc = qdio_shutdown(CARD_DDEV(card),
1854                                 QDIO_FLAG_CLEANUP_USING_HALT);
1855                 else
1856                         rc = qdio_shutdown(CARD_DDEV(card),
1857                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1858                 if (rc)
1859                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1860                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1861                 break;
1862         case QETH_QDIO_CLEANING:
1863                 return rc;
1864         default:
1865                 break;
1866         }
1867         rc = qeth_clear_halt_card(card, use_halt);
1868         if (rc)
1869                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1870         return rc;
1871 }
1872 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1873
1874 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1875 {
1876         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1877         struct diag26c_vnic_resp *response = NULL;
1878         struct diag26c_vnic_req *request = NULL;
1879         struct ccw_dev_id id;
1880         char userid[80];
1881         int rc = 0;
1882
1883         QETH_CARD_TEXT(card, 2, "vmlayer");
1884
1885         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1886         if (rc)
1887                 goto out;
1888
1889         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1890         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1891         if (!request || !response) {
1892                 rc = -ENOMEM;
1893                 goto out;
1894         }
1895
1896         ccw_device_get_id(CARD_RDEV(card), &id);
1897         request->resp_buf_len = sizeof(*response);
1898         request->resp_version = DIAG26C_VERSION6_VM65918;
1899         request->req_format = DIAG26C_VNIC_INFO;
1900         ASCEBC(userid, 8);
1901         memcpy(&request->sys_name, userid, 8);
1902         request->devno = id.devno;
1903
1904         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1905         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1906         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1907         if (rc)
1908                 goto out;
1909         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1910
1911         if (request->resp_buf_len < sizeof(*response) ||
1912             response->version != request->resp_version) {
1913                 rc = -EIO;
1914                 goto out;
1915         }
1916
1917         if (response->protocol == VNIC_INFO_PROT_L2)
1918                 disc = QETH_DISCIPLINE_LAYER2;
1919         else if (response->protocol == VNIC_INFO_PROT_L3)
1920                 disc = QETH_DISCIPLINE_LAYER3;
1921
1922 out:
1923         kfree(response);
1924         kfree(request);
1925         if (rc)
1926                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1927         return disc;
1928 }
1929
1930 /* Determine whether the device requires a specific layer discipline */
1931 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1932 {
1933         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1934
1935         if (IS_OSM(card) || IS_OSN(card))
1936                 disc = QETH_DISCIPLINE_LAYER2;
1937         else if (IS_VM_NIC(card))
1938                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1939                                       qeth_vm_detect_layer(card);
1940
1941         switch (disc) {
1942         case QETH_DISCIPLINE_LAYER2:
1943                 QETH_CARD_TEXT(card, 3, "force l2");
1944                 break;
1945         case QETH_DISCIPLINE_LAYER3:
1946                 QETH_CARD_TEXT(card, 3, "force l3");
1947                 break;
1948         default:
1949                 QETH_CARD_TEXT(card, 3, "force no");
1950         }
1951
1952         return disc;
1953 }
1954
1955 static void qeth_set_blkt_defaults(struct qeth_card *card)
1956 {
1957         QETH_CARD_TEXT(card, 2, "cfgblkt");
1958
1959         if (card->info.use_v1_blkt) {
1960                 card->info.blkt.time_total = 0;
1961                 card->info.blkt.inter_packet = 0;
1962                 card->info.blkt.inter_packet_jumbo = 0;
1963         } else {
1964                 card->info.blkt.time_total = 250;
1965                 card->info.blkt.inter_packet = 5;
1966                 card->info.blkt.inter_packet_jumbo = 15;
1967         }
1968 }
1969
1970 static void qeth_idx_init(struct qeth_card *card)
1971 {
1972         memset(&card->seqno, 0, sizeof(card->seqno));
1973
1974         card->token.issuer_rm_w = 0x00010103UL;
1975         card->token.cm_filter_w = 0x00010108UL;
1976         card->token.cm_connection_w = 0x0001010aUL;
1977         card->token.ulp_filter_w = 0x0001010bUL;
1978         card->token.ulp_connection_w = 0x0001010dUL;
1979
1980         switch (card->info.type) {
1981         case QETH_CARD_TYPE_IQD:
1982                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1983                 break;
1984         case QETH_CARD_TYPE_OSD:
1985         case QETH_CARD_TYPE_OSN:
1986                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1987                 break;
1988         default:
1989                 break;
1990         }
1991 }
1992
1993 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1994                                   struct qeth_cmd_buffer *iob)
1995 {
1996         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1997                QETH_SEQ_NO_LENGTH);
1998         if (iob->channel == &card->write)
1999                 card->seqno.trans_hdr++;
2000 }
2001
2002 static int qeth_peer_func_level(int level)
2003 {
2004         if ((level & 0xff) == 8)
2005                 return (level & 0xff) + 0x400;
2006         if (((level >> 8) & 3) == 1)
2007                 return (level & 0xff) + 0x200;
2008         return level;
2009 }
2010
2011 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
2012                                   struct qeth_cmd_buffer *iob)
2013 {
2014         qeth_idx_finalize_cmd(card, iob);
2015
2016         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2017                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2018         card->seqno.pdu_hdr++;
2019         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2020                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2021
2022         iob->callback = qeth_release_buffer_cb;
2023 }
2024
2025 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2026                                  struct qeth_cmd_buffer *reply)
2027 {
2028         /* MPC cmds are issued strictly in sequence. */
2029         return !IS_IPA(reply->data);
2030 }
2031
2032 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2033                                                   const void *data,
2034                                                   unsigned int data_length)
2035 {
2036         struct qeth_cmd_buffer *iob;
2037
2038         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2039         if (!iob)
2040                 return NULL;
2041
2042         memcpy(iob->data, data, data_length);
2043         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2044                        iob->data);
2045         iob->finalize = qeth_mpc_finalize_cmd;
2046         iob->match = qeth_mpc_match_reply;
2047         return iob;
2048 }
2049
2050 /**
2051  * qeth_send_control_data() -   send control command to the card
2052  * @card:                       qeth_card structure pointer
2053  * @iob:                        qeth_cmd_buffer pointer
2054  * @reply_cb:                   callback function pointer
2055  * @cb_card:                    pointer to the qeth_card structure
2056  * @cb_reply:                   pointer to the qeth_reply structure
2057  * @cb_cmd:                     pointer to the original iob for non-IPA
2058  *                              commands, or to the qeth_ipa_cmd structure
2059  *                              for the IPA commands.
2060  * @reply_param:                private pointer passed to the callback
2061  *
2062  * Callback function gets called one or more times, with cb_cmd
2063  * pointing to the response returned by the hardware. Callback
2064  * function must return
2065  *   > 0 if more reply blocks are expected,
2066  *     0 if the last or only reply block is received, and
2067  *   < 0 on error.
2068  * Callback function can get the value of the reply_param pointer from the
2069  * field 'param' of the structure qeth_reply.
2070  */
2071
2072 static int qeth_send_control_data(struct qeth_card *card,
2073                                   struct qeth_cmd_buffer *iob,
2074                                   int (*reply_cb)(struct qeth_card *cb_card,
2075                                                   struct qeth_reply *cb_reply,
2076                                                   unsigned long cb_cmd),
2077                                   void *reply_param)
2078 {
2079         struct qeth_channel *channel = iob->channel;
2080         struct qeth_reply *reply = &iob->reply;
2081         long timeout = iob->timeout;
2082         int rc;
2083
2084         QETH_CARD_TEXT(card, 2, "sendctl");
2085
2086         reply->callback = reply_cb;
2087         reply->param = reply_param;
2088
2089         timeout = wait_event_interruptible_timeout(card->wait_q,
2090                                                    qeth_trylock_channel(channel),
2091                                                    timeout);
2092         if (timeout <= 0) {
2093                 qeth_put_cmd(iob);
2094                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2095         }
2096
2097         if (iob->finalize)
2098                 iob->finalize(card, iob);
2099         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2100
2101         qeth_enqueue_cmd(card, iob);
2102
2103         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2104         qeth_get_cmd(iob);
2105
2106         QETH_CARD_TEXT(card, 6, "noirqpnd");
2107         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2108         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2109                                       (addr_t) iob, 0, 0, timeout);
2110         if (!rc)
2111                 channel->active_cmd = iob;
2112         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2113         if (rc) {
2114                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2115                                  CARD_DEVID(card), rc);
2116                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2117                 qeth_dequeue_cmd(card, iob);
2118                 qeth_put_cmd(iob);
2119                 qeth_unlock_channel(card, channel);
2120                 goto out;
2121         }
2122
2123         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2124                                                             timeout);
2125         if (timeout <= 0)
2126                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2127
2128         qeth_dequeue_cmd(card, iob);
2129
2130         if (reply_cb) {
2131                 /* Wait until the callback for a late reply has completed: */
2132                 spin_lock_irq(&iob->lock);
2133                 if (rc)
2134                         /* Zap any callback that's still pending: */
2135                         iob->rc = rc;
2136                 spin_unlock_irq(&iob->lock);
2137         }
2138
2139         if (!rc)
2140                 rc = iob->rc;
2141
2142 out:
2143         qeth_put_cmd(iob);
2144         return rc;
2145 }
2146
2147 struct qeth_node_desc {
2148         struct node_descriptor nd1;
2149         struct node_descriptor nd2;
2150         struct node_descriptor nd3;
2151 };
2152
2153 static void qeth_read_conf_data_cb(struct qeth_card *card,
2154                                    struct qeth_cmd_buffer *iob,
2155                                    unsigned int data_length)
2156 {
2157         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2158         int rc = 0;
2159         u8 *tag;
2160
2161         QETH_CARD_TEXT(card, 2, "cfgunit");
2162
2163         if (data_length < sizeof(*nd)) {
2164                 rc = -EINVAL;
2165                 goto out;
2166         }
2167
2168         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2169                                nd->nd1.plant[1] == _ascebc['M'];
2170         tag = (u8 *)&nd->nd1.tag;
2171         card->info.chpid = tag[0];
2172         card->info.unit_addr2 = tag[1];
2173
2174         tag = (u8 *)&nd->nd2.tag;
2175         card->info.cula = tag[1];
2176
2177         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2178                                  nd->nd3.model[1] == 0xF0 &&
2179                                  nd->nd3.model[2] >= 0xF1 &&
2180                                  nd->nd3.model[2] <= 0xF4;
2181
2182 out:
2183         qeth_notify_cmd(iob, rc);
2184         qeth_put_cmd(iob);
2185 }
2186
2187 static int qeth_read_conf_data(struct qeth_card *card)
2188 {
2189         struct qeth_channel *channel = &card->data;
2190         struct qeth_cmd_buffer *iob;
2191         struct ciw *ciw;
2192
2193         /* scan for RCD command in extended SenseID data */
2194         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2195         if (!ciw || ciw->cmd == 0)
2196                 return -EOPNOTSUPP;
2197         if (ciw->count < sizeof(struct qeth_node_desc))
2198                 return -EINVAL;
2199
2200         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2201         if (!iob)
2202                 return -ENOMEM;
2203
2204         iob->callback = qeth_read_conf_data_cb;
2205         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2206                        iob->data);
2207
2208         return qeth_send_control_data(card, iob, NULL, NULL);
2209 }
2210
2211 static int qeth_idx_check_activate_response(struct qeth_card *card,
2212                                             struct qeth_channel *channel,
2213                                             struct qeth_cmd_buffer *iob)
2214 {
2215         int rc;
2216
2217         rc = qeth_check_idx_response(card, iob->data);
2218         if (rc)
2219                 return rc;
2220
2221         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2222                 return 0;
2223
2224         /* negative reply: */
2225         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2226                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2227
2228         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2229         case QETH_IDX_ACT_ERR_EXCL:
2230                 dev_err(&channel->ccwdev->dev,
2231                         "The adapter is used exclusively by another host\n");
2232                 return -EBUSY;
2233         case QETH_IDX_ACT_ERR_AUTH:
2234         case QETH_IDX_ACT_ERR_AUTH_USER:
2235                 dev_err(&channel->ccwdev->dev,
2236                         "Setting the device online failed because of insufficient authorization\n");
2237                 return -EPERM;
2238         default:
2239                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2240                                  CCW_DEVID(channel->ccwdev));
2241                 return -EIO;
2242         }
2243 }
2244
2245 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2246                                               struct qeth_cmd_buffer *iob,
2247                                               unsigned int data_length)
2248 {
2249         struct qeth_channel *channel = iob->channel;
2250         u16 peer_level;
2251         int rc;
2252
2253         QETH_CARD_TEXT(card, 2, "idxrdcb");
2254
2255         rc = qeth_idx_check_activate_response(card, channel, iob);
2256         if (rc)
2257                 goto out;
2258
2259         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2260         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2261                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2262                                  CCW_DEVID(channel->ccwdev),
2263                                  card->info.func_level, peer_level);
2264                 rc = -EINVAL;
2265                 goto out;
2266         }
2267
2268         memcpy(&card->token.issuer_rm_r,
2269                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2270                QETH_MPC_TOKEN_LENGTH);
2271         memcpy(&card->info.mcl_level[0],
2272                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2273
2274 out:
2275         qeth_notify_cmd(iob, rc);
2276         qeth_put_cmd(iob);
2277 }
2278
2279 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2280                                                struct qeth_cmd_buffer *iob,
2281                                                unsigned int data_length)
2282 {
2283         struct qeth_channel *channel = iob->channel;
2284         u16 peer_level;
2285         int rc;
2286
2287         QETH_CARD_TEXT(card, 2, "idxwrcb");
2288
2289         rc = qeth_idx_check_activate_response(card, channel, iob);
2290         if (rc)
2291                 goto out;
2292
2293         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2294         if ((peer_level & ~0x0100) !=
2295             qeth_peer_func_level(card->info.func_level)) {
2296                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2297                                  CCW_DEVID(channel->ccwdev),
2298                                  card->info.func_level, peer_level);
2299                 rc = -EINVAL;
2300         }
2301
2302 out:
2303         qeth_notify_cmd(iob, rc);
2304         qeth_put_cmd(iob);
2305 }
2306
2307 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2308                                         struct qeth_cmd_buffer *iob)
2309 {
2310         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2311         u8 port = ((u8)card->dev->dev_port) | 0x80;
2312         struct ccw1 *ccw = __ccw_from_cmd(iob);
2313
2314         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2315                        iob->data);
2316         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2317         iob->finalize = qeth_idx_finalize_cmd;
2318
2319         port |= QETH_IDX_ACT_INVAL_FRAME;
2320         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2321         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2322                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2323         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2324                &card->info.func_level, 2);
2325         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2326         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2327 }
2328
2329 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2330 {
2331         struct qeth_channel *channel = &card->read;
2332         struct qeth_cmd_buffer *iob;
2333         int rc;
2334
2335         QETH_CARD_TEXT(card, 2, "idxread");
2336
2337         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2338         if (!iob)
2339                 return -ENOMEM;
2340
2341         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2342         qeth_idx_setup_activate_cmd(card, iob);
2343         iob->callback = qeth_idx_activate_read_channel_cb;
2344
2345         rc = qeth_send_control_data(card, iob, NULL, NULL);
2346         if (rc)
2347                 return rc;
2348
2349         channel->state = CH_STATE_UP;
2350         return 0;
2351 }
2352
2353 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2354 {
2355         struct qeth_channel *channel = &card->write;
2356         struct qeth_cmd_buffer *iob;
2357         int rc;
2358
2359         QETH_CARD_TEXT(card, 2, "idxwrite");
2360
2361         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2362         if (!iob)
2363                 return -ENOMEM;
2364
2365         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2366         qeth_idx_setup_activate_cmd(card, iob);
2367         iob->callback = qeth_idx_activate_write_channel_cb;
2368
2369         rc = qeth_send_control_data(card, iob, NULL, NULL);
2370         if (rc)
2371                 return rc;
2372
2373         channel->state = CH_STATE_UP;
2374         return 0;
2375 }
2376
2377 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2378                 unsigned long data)
2379 {
2380         struct qeth_cmd_buffer *iob;
2381
2382         QETH_CARD_TEXT(card, 2, "cmenblcb");
2383
2384         iob = (struct qeth_cmd_buffer *) data;
2385         memcpy(&card->token.cm_filter_r,
2386                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2387                QETH_MPC_TOKEN_LENGTH);
2388         return 0;
2389 }
2390
2391 static int qeth_cm_enable(struct qeth_card *card)
2392 {
2393         struct qeth_cmd_buffer *iob;
2394
2395         QETH_CARD_TEXT(card, 2, "cmenable");
2396
2397         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2398         if (!iob)
2399                 return -ENOMEM;
2400
2401         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2402                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2403         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2404                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2405
2406         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2407 }
2408
2409 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2410                 unsigned long data)
2411 {
2412         struct qeth_cmd_buffer *iob;
2413
2414         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2415
2416         iob = (struct qeth_cmd_buffer *) data;
2417         memcpy(&card->token.cm_connection_r,
2418                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2419                QETH_MPC_TOKEN_LENGTH);
2420         return 0;
2421 }
2422
2423 static int qeth_cm_setup(struct qeth_card *card)
2424 {
2425         struct qeth_cmd_buffer *iob;
2426
2427         QETH_CARD_TEXT(card, 2, "cmsetup");
2428
2429         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2430         if (!iob)
2431                 return -ENOMEM;
2432
2433         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2434                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2435         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2436                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2437         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2438                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2439         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2440 }
2441
2442 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2443 {
2444         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2445             link_type == QETH_LINK_TYPE_HSTR) {
2446                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2447                 return false;
2448         }
2449
2450         return true;
2451 }
2452
2453 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2454 {
2455         struct net_device *dev = card->dev;
2456         unsigned int new_mtu;
2457
2458         if (!max_mtu) {
2459                 /* IQD needs accurate max MTU to set up its RX buffers: */
2460                 if (IS_IQD(card))
2461                         return -EINVAL;
2462                 /* tolerate quirky HW: */
2463                 max_mtu = ETH_MAX_MTU;
2464         }
2465
2466         rtnl_lock();
2467         if (IS_IQD(card)) {
2468                 /* move any device with default MTU to new max MTU: */
2469                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2470
2471                 /* adjust RX buffer size to new max MTU: */
2472                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2473                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2474                         qeth_free_qdio_queues(card);
2475         } else {
2476                 if (dev->mtu)
2477                         new_mtu = dev->mtu;
2478                 /* default MTUs for first setup: */
2479                 else if (IS_LAYER2(card))
2480                         new_mtu = ETH_DATA_LEN;
2481                 else
2482                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2483         }
2484
2485         dev->max_mtu = max_mtu;
2486         dev->mtu = min(new_mtu, max_mtu);
2487         rtnl_unlock();
2488         return 0;
2489 }
2490
2491 static int qeth_get_mtu_outof_framesize(int framesize)
2492 {
2493         switch (framesize) {
2494         case 0x4000:
2495                 return 8192;
2496         case 0x6000:
2497                 return 16384;
2498         case 0xa000:
2499                 return 32768;
2500         case 0xffff:
2501                 return 57344;
2502         default:
2503                 return 0;
2504         }
2505 }
2506
2507 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2508                 unsigned long data)
2509 {
2510         __u16 mtu, framesize;
2511         __u16 len;
2512         struct qeth_cmd_buffer *iob;
2513         u8 link_type = 0;
2514
2515         QETH_CARD_TEXT(card, 2, "ulpenacb");
2516
2517         iob = (struct qeth_cmd_buffer *) data;
2518         memcpy(&card->token.ulp_filter_r,
2519                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2520                QETH_MPC_TOKEN_LENGTH);
2521         if (IS_IQD(card)) {
2522                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2523                 mtu = qeth_get_mtu_outof_framesize(framesize);
2524         } else {
2525                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2526         }
2527         *(u16 *)reply->param = mtu;
2528
2529         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2530         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2531                 memcpy(&link_type,
2532                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2533                 if (!qeth_is_supported_link_type(card, link_type))
2534                         return -EPROTONOSUPPORT;
2535         }
2536
2537         card->info.link_type = link_type;
2538         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2539         return 0;
2540 }
2541
2542 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2543 {
2544         if (IS_OSN(card))
2545                 return QETH_PROT_OSN2;
2546         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2547 }
2548
2549 static int qeth_ulp_enable(struct qeth_card *card)
2550 {
2551         u8 prot_type = qeth_mpc_select_prot_type(card);
2552         struct qeth_cmd_buffer *iob;
2553         u16 max_mtu;
2554         int rc;
2555
2556         QETH_CARD_TEXT(card, 2, "ulpenabl");
2557
2558         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2559         if (!iob)
2560                 return -ENOMEM;
2561
2562         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2563         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2564         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2565                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2566         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2567                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2568         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2569         if (rc)
2570                 return rc;
2571         return qeth_update_max_mtu(card, max_mtu);
2572 }
2573
2574 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2575                 unsigned long data)
2576 {
2577         struct qeth_cmd_buffer *iob;
2578
2579         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2580
2581         iob = (struct qeth_cmd_buffer *) data;
2582         memcpy(&card->token.ulp_connection_r,
2583                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2584                QETH_MPC_TOKEN_LENGTH);
2585         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2586                      3)) {
2587                 QETH_CARD_TEXT(card, 2, "olmlimit");
2588                 dev_err(&card->gdev->dev, "A connection could not be "
2589                         "established because of an OLM limit\n");
2590                 return -EMLINK;
2591         }
2592         return 0;
2593 }
2594
2595 static int qeth_ulp_setup(struct qeth_card *card)
2596 {
2597         __u16 temp;
2598         struct qeth_cmd_buffer *iob;
2599
2600         QETH_CARD_TEXT(card, 2, "ulpsetup");
2601
2602         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2603         if (!iob)
2604                 return -ENOMEM;
2605
2606         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2607                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2608         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2609                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2610         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2611                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2612
2613         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2614         temp = (card->info.cula << 8) + card->info.unit_addr2;
2615         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2616         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2617 }
2618
2619 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2620 {
2621         struct qeth_qdio_out_buffer *newbuf;
2622
2623         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2624         if (!newbuf)
2625                 return -ENOMEM;
2626
2627         newbuf->buffer = q->qdio_bufs[bidx];
2628         skb_queue_head_init(&newbuf->skb_list);
2629         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2630         newbuf->q = q;
2631         newbuf->next_pending = q->bufs[bidx];
2632         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2633         q->bufs[bidx] = newbuf;
2634         return 0;
2635 }
2636
2637 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2638 {
2639         if (!q)
2640                 return;
2641
2642         qeth_drain_output_queue(q, true);
2643         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2644         kfree(q);
2645 }
2646
2647 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2648 {
2649         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2650
2651         if (!q)
2652                 return NULL;
2653
2654         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2655                 kfree(q);
2656                 return NULL;
2657         }
2658         return q;
2659 }
2660
2661 static void qeth_tx_completion_timer(struct timer_list *timer)
2662 {
2663         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2664
2665         napi_schedule(&queue->napi);
2666         QETH_TXQ_STAT_INC(queue, completion_timer);
2667 }
2668
2669 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2670 {
2671         int i, j;
2672
2673         QETH_CARD_TEXT(card, 2, "allcqdbf");
2674
2675         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2676                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2677                 return 0;
2678
2679         QETH_CARD_TEXT(card, 2, "inq");
2680         card->qdio.in_q = qeth_alloc_qdio_queue();
2681         if (!card->qdio.in_q)
2682                 goto out_nomem;
2683
2684         /* inbound buffer pool */
2685         if (qeth_alloc_buffer_pool(card))
2686                 goto out_freeinq;
2687
2688         /* outbound */
2689         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2690                 struct qeth_qdio_out_q *queue;
2691
2692                 queue = qeth_alloc_output_queue();
2693                 if (!queue)
2694                         goto out_freeoutq;
2695                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2696                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2697                 card->qdio.out_qs[i] = queue;
2698                 queue->card = card;
2699                 queue->queue_no = i;
2700                 spin_lock_init(&queue->lock);
2701                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2702                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2703                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2704
2705                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2706                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2707                         WARN_ON(queue->bufs[j]);
2708                         if (qeth_init_qdio_out_buf(queue, j))
2709                                 goto out_freeoutqbufs;
2710                 }
2711         }
2712
2713         /* completion */
2714         if (qeth_alloc_cq(card))
2715                 goto out_freeoutq;
2716
2717         return 0;
2718
2719 out_freeoutqbufs:
2720         while (j > 0) {
2721                 --j;
2722                 kmem_cache_free(qeth_qdio_outbuf_cache,
2723                                 card->qdio.out_qs[i]->bufs[j]);
2724                 card->qdio.out_qs[i]->bufs[j] = NULL;
2725         }
2726 out_freeoutq:
2727         while (i > 0) {
2728                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2729                 card->qdio.out_qs[i] = NULL;
2730         }
2731         qeth_free_buffer_pool(card);
2732 out_freeinq:
2733         qeth_free_qdio_queue(card->qdio.in_q);
2734         card->qdio.in_q = NULL;
2735 out_nomem:
2736         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2737         return -ENOMEM;
2738 }
2739
2740 static void qeth_free_qdio_queues(struct qeth_card *card)
2741 {
2742         int i, j;
2743
2744         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2745                 QETH_QDIO_UNINITIALIZED)
2746                 return;
2747
2748         qeth_free_cq(card);
2749         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2750                 if (card->qdio.in_q->bufs[j].rx_skb)
2751                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2752         }
2753         qeth_free_qdio_queue(card->qdio.in_q);
2754         card->qdio.in_q = NULL;
2755         /* inbound buffer pool */
2756         qeth_free_buffer_pool(card);
2757         /* free outbound qdio_qs */
2758         for (i = 0; i < card->qdio.no_out_queues; i++) {
2759                 qeth_free_output_queue(card->qdio.out_qs[i]);
2760                 card->qdio.out_qs[i] = NULL;
2761         }
2762 }
2763
2764 static void qeth_create_qib_param_field(struct qeth_card *card,
2765                 char *param_field)
2766 {
2767
2768         param_field[0] = _ascebc['P'];
2769         param_field[1] = _ascebc['C'];
2770         param_field[2] = _ascebc['I'];
2771         param_field[3] = _ascebc['T'];
2772         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2773         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2774         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2775 }
2776
2777 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2778                 char *param_field)
2779 {
2780         param_field[16] = _ascebc['B'];
2781         param_field[17] = _ascebc['L'];
2782         param_field[18] = _ascebc['K'];
2783         param_field[19] = _ascebc['T'];
2784         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2785         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2786         *((unsigned int *) (&param_field[28])) =
2787                 card->info.blkt.inter_packet_jumbo;
2788 }
2789
2790 static int qeth_qdio_activate(struct qeth_card *card)
2791 {
2792         QETH_CARD_TEXT(card, 3, "qdioact");
2793         return qdio_activate(CARD_DDEV(card));
2794 }
2795
2796 static int qeth_dm_act(struct qeth_card *card)
2797 {
2798         struct qeth_cmd_buffer *iob;
2799
2800         QETH_CARD_TEXT(card, 2, "dmact");
2801
2802         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2803         if (!iob)
2804                 return -ENOMEM;
2805
2806         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2807                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2808         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2809                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2810         return qeth_send_control_data(card, iob, NULL, NULL);
2811 }
2812
2813 static int qeth_mpc_initialize(struct qeth_card *card)
2814 {
2815         int rc;
2816
2817         QETH_CARD_TEXT(card, 2, "mpcinit");
2818
2819         rc = qeth_issue_next_read(card);
2820         if (rc) {
2821                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2822                 return rc;
2823         }
2824         rc = qeth_cm_enable(card);
2825         if (rc) {
2826                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2827                 return rc;
2828         }
2829         rc = qeth_cm_setup(card);
2830         if (rc) {
2831                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2832                 return rc;
2833         }
2834         rc = qeth_ulp_enable(card);
2835         if (rc) {
2836                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2837                 return rc;
2838         }
2839         rc = qeth_ulp_setup(card);
2840         if (rc) {
2841                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2842                 return rc;
2843         }
2844         rc = qeth_alloc_qdio_queues(card);
2845         if (rc) {
2846                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2847                 return rc;
2848         }
2849         rc = qeth_qdio_establish(card);
2850         if (rc) {
2851                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2852                 qeth_free_qdio_queues(card);
2853                 return rc;
2854         }
2855         rc = qeth_qdio_activate(card);
2856         if (rc) {
2857                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2858                 return rc;
2859         }
2860         rc = qeth_dm_act(card);
2861         if (rc) {
2862                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2863                 return rc;
2864         }
2865
2866         return 0;
2867 }
2868
2869 void qeth_print_status_message(struct qeth_card *card)
2870 {
2871         switch (card->info.type) {
2872         case QETH_CARD_TYPE_OSD:
2873         case QETH_CARD_TYPE_OSM:
2874         case QETH_CARD_TYPE_OSX:
2875                 /* VM will use a non-zero first character
2876                  * to indicate a HiperSockets like reporting
2877                  * of the level OSA sets the first character to zero
2878                  * */
2879                 if (!card->info.mcl_level[0]) {
2880                         sprintf(card->info.mcl_level, "%02x%02x",
2881                                 card->info.mcl_level[2],
2882                                 card->info.mcl_level[3]);
2883                         break;
2884                 }
2885                 fallthrough;
2886         case QETH_CARD_TYPE_IQD:
2887                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2888                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2889                                 card->info.mcl_level[0]];
2890                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2891                                 card->info.mcl_level[1]];
2892                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2893                                 card->info.mcl_level[2]];
2894                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2895                                 card->info.mcl_level[3]];
2896                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2897                 }
2898                 break;
2899         default:
2900                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2901         }
2902         dev_info(&card->gdev->dev,
2903                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2904                  qeth_get_cardname(card),
2905                  (card->info.mcl_level[0]) ? " (level: " : "",
2906                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2907                  (card->info.mcl_level[0]) ? ")" : "",
2908                  qeth_get_cardname_short(card));
2909 }
2910 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2911
2912 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2913 {
2914         struct qeth_buffer_pool_entry *entry;
2915
2916         QETH_CARD_TEXT(card, 5, "inwrklst");
2917
2918         list_for_each_entry(entry,
2919                             &card->qdio.init_pool.entry_list, init_list) {
2920                 qeth_put_buffer_pool_entry(card, entry);
2921         }
2922 }
2923
2924 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2925                                         struct qeth_card *card)
2926 {
2927         struct qeth_buffer_pool_entry *entry;
2928         int i, free;
2929
2930         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2931                 return NULL;
2932
2933         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2934                 free = 1;
2935                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2936                         if (page_count(entry->elements[i]) > 1) {
2937                                 free = 0;
2938                                 break;
2939                         }
2940                 }
2941                 if (free) {
2942                         list_del_init(&entry->list);
2943                         return entry;
2944                 }
2945         }
2946
2947         /* no free buffer in pool so take first one and swap pages */
2948         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2949                                  struct qeth_buffer_pool_entry, list);
2950         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2951                 if (page_count(entry->elements[i]) > 1) {
2952                         struct page *page = dev_alloc_page();
2953
2954                         if (!page)
2955                                 return NULL;
2956
2957                         __free_page(entry->elements[i]);
2958                         entry->elements[i] = page;
2959                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2960                 }
2961         }
2962         list_del_init(&entry->list);
2963         return entry;
2964 }
2965
2966 static int qeth_init_input_buffer(struct qeth_card *card,
2967                 struct qeth_qdio_buffer *buf)
2968 {
2969         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2970         int i;
2971
2972         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2973                 buf->rx_skb = netdev_alloc_skb(card->dev,
2974                                                ETH_HLEN +
2975                                                sizeof(struct ipv6hdr));
2976                 if (!buf->rx_skb)
2977                         return -ENOMEM;
2978         }
2979
2980         if (!pool_entry) {
2981                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2982                 if (!pool_entry)
2983                         return -ENOBUFS;
2984
2985                 buf->pool_entry = pool_entry;
2986         }
2987
2988         /*
2989          * since the buffer is accessed only from the input_tasklet
2990          * there shouldn't be a need to synchronize; also, since we use
2991          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2992          * buffers
2993          */
2994         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2995                 buf->buffer->element[i].length = PAGE_SIZE;
2996                 buf->buffer->element[i].addr =
2997                         page_to_phys(pool_entry->elements[i]);
2998                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2999                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
3000                 else
3001                         buf->buffer->element[i].eflags = 0;
3002                 buf->buffer->element[i].sflags = 0;
3003         }
3004         return 0;
3005 }
3006
3007 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3008                                             struct qeth_qdio_out_q *queue)
3009 {
3010         if (!IS_IQD(card) ||
3011             qeth_iqd_is_mcast_queue(card, queue) ||
3012             card->options.cq == QETH_CQ_ENABLED ||
3013             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3014                 return 1;
3015
3016         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3017 }
3018
3019 static int qeth_init_qdio_queues(struct qeth_card *card)
3020 {
3021         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3022         unsigned int i;
3023         int rc;
3024
3025         QETH_CARD_TEXT(card, 2, "initqdqs");
3026
3027         /* inbound queue */
3028         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3029         memset(&card->rx, 0, sizeof(struct qeth_rx));
3030
3031         qeth_initialize_working_pool_list(card);
3032         /*give only as many buffers to hardware as we have buffer pool entries*/
3033         for (i = 0; i < rx_bufs; i++) {
3034                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3035                 if (rc)
3036                         return rc;
3037         }
3038
3039         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3040         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3041         if (rc) {
3042                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3043                 return rc;
3044         }
3045
3046         /* completion */
3047         rc = qeth_cq_init(card);
3048         if (rc) {
3049                 return rc;
3050         }
3051
3052         /* outbound queue */
3053         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3054                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3055
3056                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3057                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3058                 queue->next_buf_to_fill = 0;
3059                 queue->do_pack = 0;
3060                 queue->prev_hdr = NULL;
3061                 queue->coalesced_frames = 0;
3062                 queue->bulk_start = 0;
3063                 queue->bulk_count = 0;
3064                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3065                 atomic_set(&queue->used_buffers, 0);
3066                 atomic_set(&queue->set_pci_flags_count, 0);
3067                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3068         }
3069         return 0;
3070 }
3071
3072 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3073                                   struct qeth_cmd_buffer *iob)
3074 {
3075         qeth_mpc_finalize_cmd(card, iob);
3076
3077         /* override with IPA-specific values: */
3078         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3079 }
3080
3081 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3082                           u16 cmd_length,
3083                           bool (*match)(struct qeth_cmd_buffer *iob,
3084                                         struct qeth_cmd_buffer *reply))
3085 {
3086         u8 prot_type = qeth_mpc_select_prot_type(card);
3087         u16 total_length = iob->length;
3088
3089         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3090                        iob->data);
3091         iob->finalize = qeth_ipa_finalize_cmd;
3092         iob->match = match;
3093
3094         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3095         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3096         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3097         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3098         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3099         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3100                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3101         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3102 }
3103 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3104
3105 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3106                                  struct qeth_cmd_buffer *reply)
3107 {
3108         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3109
3110         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3111 }
3112
3113 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3114                                            enum qeth_ipa_cmds cmd_code,
3115                                            enum qeth_prot_versions prot,
3116                                            unsigned int data_length)
3117 {
3118         struct qeth_cmd_buffer *iob;
3119         struct qeth_ipacmd_hdr *hdr;
3120
3121         data_length += offsetof(struct qeth_ipa_cmd, data);
3122         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3123                              QETH_IPA_TIMEOUT);
3124         if (!iob)
3125                 return NULL;
3126
3127         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3128
3129         hdr = &__ipa_cmd(iob)->hdr;
3130         hdr->command = cmd_code;
3131         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3132         /* hdr->seqno is set by qeth_send_control_data() */
3133         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3134         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3135         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3136         hdr->param_count = 1;
3137         hdr->prot_version = prot;
3138         return iob;
3139 }
3140 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3141
3142 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3143                                 struct qeth_reply *reply, unsigned long data)
3144 {
3145         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3146
3147         return (cmd->hdr.return_code) ? -EIO : 0;
3148 }
3149
3150 /**
3151  * qeth_send_ipa_cmd() - send an IPA command
3152  *
3153  * See qeth_send_control_data() for explanation of the arguments.
3154  */
3155
3156 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3157                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3158                         unsigned long),
3159                 void *reply_param)
3160 {
3161         int rc;
3162
3163         QETH_CARD_TEXT(card, 4, "sendipa");
3164
3165         if (card->read_or_write_problem) {
3166                 qeth_put_cmd(iob);
3167                 return -EIO;
3168         }
3169
3170         if (reply_cb == NULL)
3171                 reply_cb = qeth_send_ipa_cmd_cb;
3172         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3173         if (rc == -ETIME) {
3174                 qeth_clear_ipacmd_list(card);
3175                 qeth_schedule_recovery(card);
3176         }
3177         return rc;
3178 }
3179 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3180
3181 static int qeth_send_startlan_cb(struct qeth_card *card,
3182                                  struct qeth_reply *reply, unsigned long data)
3183 {
3184         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3185
3186         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3187                 return -ENETDOWN;
3188
3189         return (cmd->hdr.return_code) ? -EIO : 0;
3190 }
3191
3192 static int qeth_send_startlan(struct qeth_card *card)
3193 {
3194         struct qeth_cmd_buffer *iob;
3195
3196         QETH_CARD_TEXT(card, 2, "strtlan");
3197
3198         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3199         if (!iob)
3200                 return -ENOMEM;
3201         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3202 }
3203
3204 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3205 {
3206         if (!cmd->hdr.return_code)
3207                 cmd->hdr.return_code =
3208                         cmd->data.setadapterparms.hdr.return_code;
3209         return cmd->hdr.return_code;
3210 }
3211
3212 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3213                 struct qeth_reply *reply, unsigned long data)
3214 {
3215         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3216         struct qeth_query_cmds_supp *query_cmd;
3217
3218         QETH_CARD_TEXT(card, 3, "quyadpcb");
3219         if (qeth_setadpparms_inspect_rc(cmd))
3220                 return -EIO;
3221
3222         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3223         if (query_cmd->lan_type & 0x7f) {
3224                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3225                         return -EPROTONOSUPPORT;
3226
3227                 card->info.link_type = query_cmd->lan_type;
3228                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3229         }
3230
3231         card->options.adp.supported = query_cmd->supported_cmds;
3232         return 0;
3233 }
3234
3235 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3236                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3237                                                     unsigned int data_length)
3238 {
3239         struct qeth_ipacmd_setadpparms_hdr *hdr;
3240         struct qeth_cmd_buffer *iob;
3241
3242         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3243                                  data_length +
3244                                  offsetof(struct qeth_ipacmd_setadpparms,
3245                                           data));
3246         if (!iob)
3247                 return NULL;
3248
3249         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3250         hdr->cmdlength = sizeof(*hdr) + data_length;
3251         hdr->command_code = adp_cmd;
3252         hdr->used_total = 1;
3253         hdr->seq_no = 1;
3254         return iob;
3255 }
3256
3257 static int qeth_query_setadapterparms(struct qeth_card *card)
3258 {
3259         int rc;
3260         struct qeth_cmd_buffer *iob;
3261
3262         QETH_CARD_TEXT(card, 3, "queryadp");
3263         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3264                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3265         if (!iob)
3266                 return -ENOMEM;
3267         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3268         return rc;
3269 }
3270
3271 static int qeth_query_ipassists_cb(struct qeth_card *card,
3272                 struct qeth_reply *reply, unsigned long data)
3273 {
3274         struct qeth_ipa_cmd *cmd;
3275
3276         QETH_CARD_TEXT(card, 2, "qipasscb");
3277
3278         cmd = (struct qeth_ipa_cmd *) data;
3279
3280         switch (cmd->hdr.return_code) {
3281         case IPA_RC_SUCCESS:
3282                 break;
3283         case IPA_RC_NOTSUPP:
3284         case IPA_RC_L2_UNSUPPORTED_CMD:
3285                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3286                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3287                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3288                 return -EOPNOTSUPP;
3289         default:
3290                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3291                                  CARD_DEVID(card), cmd->hdr.return_code);
3292                 return -EIO;
3293         }
3294
3295         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3296                 card->options.ipa4 = cmd->hdr.assists;
3297         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3298                 card->options.ipa6 = cmd->hdr.assists;
3299         else
3300                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3301                                  CARD_DEVID(card));
3302         return 0;
3303 }
3304
3305 static int qeth_query_ipassists(struct qeth_card *card,
3306                                 enum qeth_prot_versions prot)
3307 {
3308         int rc;
3309         struct qeth_cmd_buffer *iob;
3310
3311         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3312         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3313         if (!iob)
3314                 return -ENOMEM;
3315         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3316         return rc;
3317 }
3318
3319 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3320                                 struct qeth_reply *reply, unsigned long data)
3321 {
3322         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3323         struct qeth_query_switch_attributes *attrs;
3324         struct qeth_switch_info *sw_info;
3325
3326         QETH_CARD_TEXT(card, 2, "qswiatcb");
3327         if (qeth_setadpparms_inspect_rc(cmd))
3328                 return -EIO;
3329
3330         sw_info = (struct qeth_switch_info *)reply->param;
3331         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3332         sw_info->capabilities = attrs->capabilities;
3333         sw_info->settings = attrs->settings;
3334         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3335                         sw_info->settings);
3336         return 0;
3337 }
3338
3339 int qeth_query_switch_attributes(struct qeth_card *card,
3340                                  struct qeth_switch_info *sw_info)
3341 {
3342         struct qeth_cmd_buffer *iob;
3343
3344         QETH_CARD_TEXT(card, 2, "qswiattr");
3345         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3346                 return -EOPNOTSUPP;
3347         if (!netif_carrier_ok(card->dev))
3348                 return -ENOMEDIUM;
3349         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3350         if (!iob)
3351                 return -ENOMEM;
3352         return qeth_send_ipa_cmd(card, iob,
3353                                 qeth_query_switch_attributes_cb, sw_info);
3354 }
3355
3356 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3357                                           enum qeth_diags_cmds sub_cmd,
3358                                           unsigned int data_length)
3359 {
3360         struct qeth_ipacmd_diagass *cmd;
3361         struct qeth_cmd_buffer *iob;
3362
3363         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3364                                  DIAG_HDR_LEN + data_length);
3365         if (!iob)
3366                 return NULL;
3367
3368         cmd = &__ipa_cmd(iob)->data.diagass;
3369         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3370         cmd->subcmd = sub_cmd;
3371         return iob;
3372 }
3373 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3374
3375 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3376                 struct qeth_reply *reply, unsigned long data)
3377 {
3378         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3379         u16 rc = cmd->hdr.return_code;
3380
3381         if (rc) {
3382                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3383                 return -EIO;
3384         }
3385
3386         card->info.diagass_support = cmd->data.diagass.ext;
3387         return 0;
3388 }
3389
3390 static int qeth_query_setdiagass(struct qeth_card *card)
3391 {
3392         struct qeth_cmd_buffer *iob;
3393
3394         QETH_CARD_TEXT(card, 2, "qdiagass");
3395         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3396         if (!iob)
3397                 return -ENOMEM;
3398         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3399 }
3400
3401 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3402 {
3403         unsigned long info = get_zeroed_page(GFP_KERNEL);
3404         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3405         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3406         struct ccw_dev_id ccwid;
3407         int level;
3408
3409         tid->chpid = card->info.chpid;
3410         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3411         tid->ssid = ccwid.ssid;
3412         tid->devno = ccwid.devno;
3413         if (!info)
3414                 return;
3415         level = stsi(NULL, 0, 0, 0);
3416         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3417                 tid->lparnr = info222->lpar_number;
3418         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3419                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3420                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3421         }
3422         free_page(info);
3423         return;
3424 }
3425
3426 static int qeth_hw_trap_cb(struct qeth_card *card,
3427                 struct qeth_reply *reply, unsigned long data)
3428 {
3429         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3430         u16 rc = cmd->hdr.return_code;
3431
3432         if (rc) {
3433                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3434                 return -EIO;
3435         }
3436         return 0;
3437 }
3438
3439 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3440 {
3441         struct qeth_cmd_buffer *iob;
3442         struct qeth_ipa_cmd *cmd;
3443
3444         QETH_CARD_TEXT(card, 2, "diagtrap");
3445         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3446         if (!iob)
3447                 return -ENOMEM;
3448         cmd = __ipa_cmd(iob);
3449         cmd->data.diagass.type = 1;
3450         cmd->data.diagass.action = action;
3451         switch (action) {
3452         case QETH_DIAGS_TRAP_ARM:
3453                 cmd->data.diagass.options = 0x0003;
3454                 cmd->data.diagass.ext = 0x00010000 +
3455                         sizeof(struct qeth_trap_id);
3456                 qeth_get_trap_id(card,
3457                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3458                 break;
3459         case QETH_DIAGS_TRAP_DISARM:
3460                 cmd->data.diagass.options = 0x0001;
3461                 break;
3462         case QETH_DIAGS_TRAP_CAPTURE:
3463                 break;
3464         }
3465         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3466 }
3467
3468 static int qeth_check_qdio_errors(struct qeth_card *card,
3469                                   struct qdio_buffer *buf,
3470                                   unsigned int qdio_error,
3471                                   const char *dbftext)
3472 {
3473         if (qdio_error) {
3474                 QETH_CARD_TEXT(card, 2, dbftext);
3475                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3476                                buf->element[15].sflags);
3477                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3478                                buf->element[14].sflags);
3479                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3480                 if ((buf->element[15].sflags) == 0x12) {
3481                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3482                         return 0;
3483                 } else
3484                         return 1;
3485         }
3486         return 0;
3487 }
3488
3489 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3490                                          unsigned int count)
3491 {
3492         struct qeth_qdio_q *queue = card->qdio.in_q;
3493         struct list_head *lh;
3494         int i;
3495         int rc;
3496         int newcount = 0;
3497
3498         /* only requeue at a certain threshold to avoid SIGAs */
3499         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3500                 for (i = queue->next_buf_to_init;
3501                      i < queue->next_buf_to_init + count; ++i) {
3502                         if (qeth_init_input_buffer(card,
3503                                 &queue->bufs[QDIO_BUFNR(i)])) {
3504                                 break;
3505                         } else {
3506                                 newcount++;
3507                         }
3508                 }
3509
3510                 if (newcount < count) {
3511                         /* we are in memory shortage so we switch back to
3512                            traditional skb allocation and drop packages */
3513                         atomic_set(&card->force_alloc_skb, 3);
3514                         count = newcount;
3515                 } else {
3516                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3517                 }
3518
3519                 if (!count) {
3520                         i = 0;
3521                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3522                                 i++;
3523                         if (i == card->qdio.in_buf_pool.buf_count) {
3524                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3525                                 schedule_delayed_work(
3526                                         &card->buffer_reclaim_work,
3527                                         QETH_RECLAIM_WORK_TIME);
3528                         }
3529                         return 0;
3530                 }
3531
3532                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3533                              queue->next_buf_to_init, count);
3534                 if (rc) {
3535                         QETH_CARD_TEXT(card, 2, "qinberr");
3536                 }
3537                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3538                                                      count);
3539                 return count;
3540         }
3541
3542         return 0;
3543 }
3544
3545 static void qeth_buffer_reclaim_work(struct work_struct *work)
3546 {
3547         struct qeth_card *card = container_of(to_delayed_work(work),
3548                                               struct qeth_card,
3549                                               buffer_reclaim_work);
3550
3551         local_bh_disable();
3552         napi_schedule(&card->napi);
3553         /* kick-start the NAPI softirq: */
3554         local_bh_enable();
3555 }
3556
3557 static void qeth_handle_send_error(struct qeth_card *card,
3558                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3559 {
3560         int sbalf15 = buffer->buffer->element[15].sflags;
3561
3562         QETH_CARD_TEXT(card, 6, "hdsnderr");
3563         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3564
3565         if (!qdio_err)
3566                 return;
3567
3568         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3569                 return;
3570
3571         QETH_CARD_TEXT(card, 1, "lnkfail");
3572         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3573                        (u16)qdio_err, (u8)sbalf15);
3574 }
3575
3576 /**
3577  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3578  * @queue: queue to check for packing buffer
3579  *
3580  * Returns number of buffers that were prepared for flush.
3581  */
3582 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3583 {
3584         struct qeth_qdio_out_buffer *buffer;
3585
3586         buffer = queue->bufs[queue->next_buf_to_fill];
3587         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3588             (buffer->next_element_to_fill > 0)) {
3589                 /* it's a packing buffer */
3590                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3591                 queue->next_buf_to_fill =
3592                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3593                 return 1;
3594         }
3595         return 0;
3596 }
3597
3598 /*
3599  * Switched to packing state if the number of used buffers on a queue
3600  * reaches a certain limit.
3601  */
3602 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3603 {
3604         if (!queue->do_pack) {
3605                 if (atomic_read(&queue->used_buffers)
3606                     >= QETH_HIGH_WATERMARK_PACK){
3607                         /* switch non-PACKING -> PACKING */
3608                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3609                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3610                         queue->do_pack = 1;
3611                 }
3612         }
3613 }
3614
3615 /*
3616  * Switches from packing to non-packing mode. If there is a packing
3617  * buffer on the queue this buffer will be prepared to be flushed.
3618  * In that case 1 is returned to inform the caller. If no buffer
3619  * has to be flushed, zero is returned.
3620  */
3621 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3622 {
3623         if (queue->do_pack) {
3624                 if (atomic_read(&queue->used_buffers)
3625                     <= QETH_LOW_WATERMARK_PACK) {
3626                         /* switch PACKING -> non-PACKING */
3627                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3628                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3629                         queue->do_pack = 0;
3630                         return qeth_prep_flush_pack_buffer(queue);
3631                 }
3632         }
3633         return 0;
3634 }
3635
3636 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3637                                int count)
3638 {
3639         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3640         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3641         struct qeth_card *card = queue->card;
3642         int rc;
3643         int i;
3644
3645         for (i = index; i < index + count; ++i) {
3646                 unsigned int bidx = QDIO_BUFNR(i);
3647                 struct sk_buff *skb;
3648
3649                 buf = queue->bufs[bidx];
3650                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3651                                 SBAL_EFLAGS_LAST_ENTRY;
3652                 queue->coalesced_frames += buf->frames;
3653
3654                 if (queue->bufstates)
3655                         queue->bufstates[bidx].user = buf;
3656
3657                 if (IS_IQD(card)) {
3658                         skb_queue_walk(&buf->skb_list, skb)
3659                                 skb_tx_timestamp(skb);
3660                 }
3661         }
3662
3663         if (!IS_IQD(card)) {
3664                 if (!queue->do_pack) {
3665                         if ((atomic_read(&queue->used_buffers) >=
3666                                 (QETH_HIGH_WATERMARK_PACK -
3667                                  QETH_WATERMARK_PACK_FUZZ)) &&
3668                             !atomic_read(&queue->set_pci_flags_count)) {
3669                                 /* it's likely that we'll go to packing
3670                                  * mode soon */
3671                                 atomic_inc(&queue->set_pci_flags_count);
3672                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3673                         }
3674                 } else {
3675                         if (!atomic_read(&queue->set_pci_flags_count)) {
3676                                 /*
3677                                  * there's no outstanding PCI any more, so we
3678                                  * have to request a PCI to be sure the the PCI
3679                                  * will wake at some time in the future then we
3680                                  * can flush packed buffers that might still be
3681                                  * hanging around, which can happen if no
3682                                  * further send was requested by the stack
3683                                  */
3684                                 atomic_inc(&queue->set_pci_flags_count);
3685                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3686                         }
3687                 }
3688
3689                 if (atomic_read(&queue->set_pci_flags_count))
3690                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3691         }
3692
3693         QETH_TXQ_STAT_INC(queue, doorbell);
3694         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3695                      queue->queue_no, index, count);
3696
3697         /* Fake the TX completion interrupt: */
3698         if (IS_IQD(card)) {
3699                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3700                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3701
3702                 if (frames && queue->coalesced_frames >= frames) {
3703                         napi_schedule(&queue->napi);
3704                         queue->coalesced_frames = 0;
3705                         QETH_TXQ_STAT_INC(queue, coal_frames);
3706                 } else if (usecs) {
3707                         qeth_tx_arm_timer(queue, usecs);
3708                 }
3709         }
3710
3711         if (rc) {
3712                 /* ignore temporary SIGA errors without busy condition */
3713                 if (rc == -ENOBUFS)
3714                         return;
3715                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3716                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3717                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3718                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3719                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3720
3721                 /* this must not happen under normal circumstances. if it
3722                  * happens something is really wrong -> recover */
3723                 qeth_schedule_recovery(queue->card);
3724                 return;
3725         }
3726 }
3727
3728 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3729 {
3730         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3731
3732         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3733         queue->prev_hdr = NULL;
3734         queue->bulk_count = 0;
3735 }
3736
3737 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3738 {
3739         /*
3740          * check if weed have to switch to non-packing mode or if
3741          * we have to get a pci flag out on the queue
3742          */
3743         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3744             !atomic_read(&queue->set_pci_flags_count)) {
3745                 unsigned int index, flush_cnt;
3746                 bool q_was_packing;
3747
3748                 spin_lock(&queue->lock);
3749
3750                 index = queue->next_buf_to_fill;
3751                 q_was_packing = queue->do_pack;
3752
3753                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3754                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3755                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3756
3757                 if (flush_cnt) {
3758                         qeth_flush_buffers(queue, index, flush_cnt);
3759                         if (q_was_packing)
3760                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3761                 }
3762
3763                 spin_unlock(&queue->lock);
3764         }
3765 }
3766
3767 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3768 {
3769         struct qeth_card *card = (struct qeth_card *)card_ptr;
3770
3771         napi_schedule_irqoff(&card->napi);
3772 }
3773
3774 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3775 {
3776         int rc;
3777
3778         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3779                 rc = -1;
3780                 goto out;
3781         } else {
3782                 if (card->options.cq == cq) {
3783                         rc = 0;
3784                         goto out;
3785                 }
3786
3787                 qeth_free_qdio_queues(card);
3788                 card->options.cq = cq;
3789                 rc = 0;
3790         }
3791 out:
3792         return rc;
3793
3794 }
3795 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3796
3797 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3798                                  unsigned int queue, int first_element,
3799                                  int count)
3800 {
3801         struct qeth_qdio_q *cq = card->qdio.c_q;
3802         int i;
3803         int rc;
3804
3805         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3806         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3807         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3808
3809         if (qdio_err) {
3810                 netif_tx_stop_all_queues(card->dev);
3811                 qeth_schedule_recovery(card);
3812                 return;
3813         }
3814
3815         for (i = first_element; i < first_element + count; ++i) {
3816                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3817                 int e = 0;
3818
3819                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3820                        buffer->element[e].addr) {
3821                         unsigned long phys_aob_addr = buffer->element[e].addr;
3822
3823                         qeth_qdio_handle_aob(card, phys_aob_addr);
3824                         ++e;
3825                 }
3826                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3827         }
3828         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3829                     card->qdio.c_q->next_buf_to_init,
3830                     count);
3831         if (rc) {
3832                 dev_warn(&card->gdev->dev,
3833                         "QDIO reported an error, rc=%i\n", rc);
3834                 QETH_CARD_TEXT(card, 2, "qcqherr");
3835         }
3836
3837         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3838 }
3839
3840 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3841                                     unsigned int qdio_err, int queue,
3842                                     int first_elem, int count,
3843                                     unsigned long card_ptr)
3844 {
3845         struct qeth_card *card = (struct qeth_card *)card_ptr;
3846
3847         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3848         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3849
3850         if (qdio_err)
3851                 qeth_schedule_recovery(card);
3852 }
3853
3854 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3855                                      unsigned int qdio_error, int __queue,
3856                                      int first_element, int count,
3857                                      unsigned long card_ptr)
3858 {
3859         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3860         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3861         struct net_device *dev = card->dev;
3862         struct netdev_queue *txq;
3863         int i;
3864
3865         QETH_CARD_TEXT(card, 6, "qdouhdl");
3866         if (qdio_error & QDIO_ERROR_FATAL) {
3867                 QETH_CARD_TEXT(card, 2, "achkcond");
3868                 netif_tx_stop_all_queues(dev);
3869                 qeth_schedule_recovery(card);
3870                 return;
3871         }
3872
3873         for (i = first_element; i < (first_element + count); ++i) {
3874                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3875
3876                 qeth_handle_send_error(card, buf, qdio_error);
3877                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3878         }
3879
3880         atomic_sub(count, &queue->used_buffers);
3881         qeth_check_outbound_queue(queue);
3882
3883         txq = netdev_get_tx_queue(dev, __queue);
3884         /* xmit may have observed the full-condition, but not yet stopped the
3885          * txq. In which case the code below won't trigger. So before returning,
3886          * xmit will re-check the txq's fill level and wake it up if needed.
3887          */
3888         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3889                 netif_tx_wake_queue(txq);
3890 }
3891
3892 /**
3893  * Note: Function assumes that we have 4 outbound queues.
3894  */
3895 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3896 {
3897         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3898         u8 tos;
3899
3900         switch (card->qdio.do_prio_queueing) {
3901         case QETH_PRIO_Q_ING_TOS:
3902         case QETH_PRIO_Q_ING_PREC:
3903                 switch (qeth_get_ip_version(skb)) {
3904                 case 4:
3905                         tos = ipv4_get_dsfield(ip_hdr(skb));
3906                         break;
3907                 case 6:
3908                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3909                         break;
3910                 default:
3911                         return card->qdio.default_out_queue;
3912                 }
3913                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3914                         return ~tos >> 6 & 3;
3915                 if (tos & IPTOS_MINCOST)
3916                         return 3;
3917                 if (tos & IPTOS_RELIABILITY)
3918                         return 2;
3919                 if (tos & IPTOS_THROUGHPUT)
3920                         return 1;
3921                 if (tos & IPTOS_LOWDELAY)
3922                         return 0;
3923                 break;
3924         case QETH_PRIO_Q_ING_SKB:
3925                 if (skb->priority > 5)
3926                         return 0;
3927                 return ~skb->priority >> 1 & 3;
3928         case QETH_PRIO_Q_ING_VLAN:
3929                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3930                         return ~ntohs(veth->h_vlan_TCI) >>
3931                                (VLAN_PRIO_SHIFT + 1) & 3;
3932                 break;
3933         case QETH_PRIO_Q_ING_FIXED:
3934                 return card->qdio.default_out_queue;
3935         default:
3936                 break;
3937         }
3938         return card->qdio.default_out_queue;
3939 }
3940 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3941
3942 /**
3943  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3944  * @skb:                                SKB address
3945  *
3946  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3947  * fragmented part of the SKB. Returns zero for linear SKB.
3948  */
3949 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3950 {
3951         int cnt, elements = 0;
3952
3953         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3954                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3955
3956                 elements += qeth_get_elements_for_range(
3957                         (addr_t)skb_frag_address(frag),
3958                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3959         }
3960         return elements;
3961 }
3962
3963 /**
3964  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3965  *                              to transmit an skb.
3966  * @skb:                        the skb to operate on.
3967  * @data_offset:                skip this part of the skb's linear data
3968  *
3969  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3970  * skb's data (both its linear part and paged fragments).
3971  */
3972 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3973 {
3974         unsigned int elements = qeth_get_elements_for_frags(skb);
3975         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3976         addr_t start = (addr_t)skb->data + data_offset;
3977
3978         if (start != end)
3979                 elements += qeth_get_elements_for_range(start, end);
3980         return elements;
3981 }
3982 EXPORT_SYMBOL_GPL(qeth_count_elements);
3983
3984 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3985                                          MAX_TCP_HEADER)
3986
3987 /**
3988  * qeth_add_hw_header() - add a HW header to an skb.
3989  * @skb: skb that the HW header should be added to.
3990  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3991  *       it contains a valid pointer to a qeth_hdr.
3992  * @hdr_len: length of the HW header.
3993  * @proto_len: length of protocol headers that need to be in same page as the
3994  *             HW header.
3995  *
3996  * Returns the pushed length. If the header can't be pushed on
3997  * (eg. because it would cross a page boundary), it is allocated from
3998  * the cache instead and 0 is returned.
3999  * The number of needed buffer elements is returned in @elements.
4000  * Error to create the hdr is indicated by returning with < 0.
4001  */
4002 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4003                               struct sk_buff *skb, struct qeth_hdr **hdr,
4004                               unsigned int hdr_len, unsigned int proto_len,
4005                               unsigned int *elements)
4006 {
4007         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4008         const unsigned int contiguous = proto_len ? proto_len : 1;
4009         const unsigned int max_elements = queue->max_elements;
4010         unsigned int __elements;
4011         addr_t start, end;
4012         bool push_ok;
4013         int rc;
4014
4015 check_layout:
4016         start = (addr_t)skb->data - hdr_len;
4017         end = (addr_t)skb->data;
4018
4019         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4020                 /* Push HW header into same page as first protocol header. */
4021                 push_ok = true;
4022                 /* ... but TSO always needs a separate element for headers: */
4023                 if (skb_is_gso(skb))
4024                         __elements = 1 + qeth_count_elements(skb, proto_len);
4025                 else
4026                         __elements = qeth_count_elements(skb, 0);
4027         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4028                 /* Push HW header into preceding page, flush with skb->data. */
4029                 push_ok = true;
4030                 __elements = 1 + qeth_count_elements(skb, 0);
4031         } else {
4032                 /* Use header cache, copy protocol headers up. */
4033                 push_ok = false;
4034                 __elements = 1 + qeth_count_elements(skb, proto_len);
4035         }
4036
4037         /* Compress skb to fit into one IO buffer: */
4038         if (__elements > max_elements) {
4039                 if (!skb_is_nonlinear(skb)) {
4040                         /* Drop it, no easy way of shrinking it further. */
4041                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4042                                          max_elements, __elements, skb->len);
4043                         return -E2BIG;
4044                 }
4045
4046                 rc = skb_linearize(skb);
4047                 if (rc) {
4048                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4049                         return rc;
4050                 }
4051
4052                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4053                 /* Linearization changed the layout, re-evaluate: */
4054                 goto check_layout;
4055         }
4056
4057         *elements = __elements;
4058         /* Add the header: */
4059         if (push_ok) {
4060                 *hdr = skb_push(skb, hdr_len);
4061                 return hdr_len;
4062         }
4063
4064         /* Fall back to cache element with known-good alignment: */
4065         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4066                 return -E2BIG;
4067         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4068         if (!*hdr)
4069                 return -ENOMEM;
4070         /* Copy protocol headers behind HW header: */
4071         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4072         return 0;
4073 }
4074
4075 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4076                               struct sk_buff *curr_skb,
4077                               struct qeth_hdr *curr_hdr)
4078 {
4079         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4080         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4081
4082         if (!prev_hdr)
4083                 return true;
4084
4085         /* All packets must have the same target: */
4086         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4087                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4088
4089                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4090                                         eth_hdr(curr_skb)->h_dest) &&
4091                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4092         }
4093
4094         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4095                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4096 }
4097
4098 /**
4099  * qeth_fill_buffer() - map skb into an output buffer
4100  * @buf:        buffer to transport the skb
4101  * @skb:        skb to map into the buffer
4102  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4103  *              from qeth_core_header_cache.
4104  * @offset:     when mapping the skb, start at skb->data + offset
4105  * @hd_len:     if > 0, build a dedicated header element of this size
4106  */
4107 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4108                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4109                                      unsigned int offset, unsigned int hd_len)
4110 {
4111         struct qdio_buffer *buffer = buf->buffer;
4112         int element = buf->next_element_to_fill;
4113         int length = skb_headlen(skb) - offset;
4114         char *data = skb->data + offset;
4115         unsigned int elem_length, cnt;
4116         bool is_first_elem = true;
4117
4118         __skb_queue_tail(&buf->skb_list, skb);
4119
4120         /* build dedicated element for HW Header */
4121         if (hd_len) {
4122                 is_first_elem = false;
4123
4124                 buffer->element[element].addr = virt_to_phys(hdr);
4125                 buffer->element[element].length = hd_len;
4126                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4127
4128                 /* HW header is allocated from cache: */
4129                 if ((void *)hdr != skb->data)
4130                         buf->is_header[element] = 1;
4131                 /* HW header was pushed and is contiguous with linear part: */
4132                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4133                          (data == (char *)hdr + hd_len))
4134                         buffer->element[element].eflags |=
4135                                 SBAL_EFLAGS_CONTIGUOUS;
4136
4137                 element++;
4138         }
4139
4140         /* map linear part into buffer element(s) */
4141         while (length > 0) {
4142                 elem_length = min_t(unsigned int, length,
4143                                     PAGE_SIZE - offset_in_page(data));
4144
4145                 buffer->element[element].addr = virt_to_phys(data);
4146                 buffer->element[element].length = elem_length;
4147                 length -= elem_length;
4148                 if (is_first_elem) {
4149                         is_first_elem = false;
4150                         if (length || skb_is_nonlinear(skb))
4151                                 /* skb needs additional elements */
4152                                 buffer->element[element].eflags =
4153                                         SBAL_EFLAGS_FIRST_FRAG;
4154                         else
4155                                 buffer->element[element].eflags = 0;
4156                 } else {
4157                         buffer->element[element].eflags =
4158                                 SBAL_EFLAGS_MIDDLE_FRAG;
4159                 }
4160
4161                 data += elem_length;
4162                 element++;
4163         }
4164
4165         /* map page frags into buffer element(s) */
4166         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4167                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4168
4169                 data = skb_frag_address(frag);
4170                 length = skb_frag_size(frag);
4171                 while (length > 0) {
4172                         elem_length = min_t(unsigned int, length,
4173                                             PAGE_SIZE - offset_in_page(data));
4174
4175                         buffer->element[element].addr = virt_to_phys(data);
4176                         buffer->element[element].length = elem_length;
4177                         buffer->element[element].eflags =
4178                                 SBAL_EFLAGS_MIDDLE_FRAG;
4179
4180                         length -= elem_length;
4181                         data += elem_length;
4182                         element++;
4183                 }
4184         }
4185
4186         if (buffer->element[element - 1].eflags)
4187                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4188         buf->next_element_to_fill = element;
4189         return element;
4190 }
4191
4192 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4193                        struct sk_buff *skb, unsigned int elements,
4194                        struct qeth_hdr *hdr, unsigned int offset,
4195                        unsigned int hd_len)
4196 {
4197         unsigned int bytes = qdisc_pkt_len(skb);
4198         struct qeth_qdio_out_buffer *buffer;
4199         unsigned int next_element;
4200         struct netdev_queue *txq;
4201         bool stopped = false;
4202         bool flush;
4203
4204         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4205         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4206
4207         /* Just a sanity check, the wake/stop logic should ensure that we always
4208          * get a free buffer.
4209          */
4210         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4211                 return -EBUSY;
4212
4213         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4214
4215         if (flush ||
4216             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4217                 if (buffer->next_element_to_fill > 0) {
4218                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4219                         queue->bulk_count++;
4220                 }
4221
4222                 if (queue->bulk_count >= queue->bulk_max)
4223                         flush = true;
4224
4225                 if (flush)
4226                         qeth_flush_queue(queue);
4227
4228                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4229                                                 queue->bulk_count)];
4230
4231                 /* Sanity-check again: */
4232                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4233                         return -EBUSY;
4234         }
4235
4236         if (buffer->next_element_to_fill == 0 &&
4237             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4238                 /* If a TX completion happens right _here_ and misses to wake
4239                  * the txq, then our re-check below will catch the race.
4240                  */
4241                 QETH_TXQ_STAT_INC(queue, stopped);
4242                 netif_tx_stop_queue(txq);
4243                 stopped = true;
4244         }
4245
4246         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4247         buffer->bytes += bytes;
4248         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4249         queue->prev_hdr = hdr;
4250
4251         flush = __netdev_tx_sent_queue(txq, bytes,
4252                                        !stopped && netdev_xmit_more());
4253
4254         if (flush || next_element >= queue->max_elements) {
4255                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4256                 queue->bulk_count++;
4257
4258                 if (queue->bulk_count >= queue->bulk_max)
4259                         flush = true;
4260
4261                 if (flush)
4262                         qeth_flush_queue(queue);
4263         }
4264
4265         if (stopped && !qeth_out_queue_is_full(queue))
4266                 netif_tx_start_queue(txq);
4267         return 0;
4268 }
4269
4270 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4271                         struct sk_buff *skb, struct qeth_hdr *hdr,
4272                         unsigned int offset, unsigned int hd_len,
4273                         int elements_needed)
4274 {
4275         unsigned int start_index = queue->next_buf_to_fill;
4276         struct qeth_qdio_out_buffer *buffer;
4277         unsigned int next_element;
4278         struct netdev_queue *txq;
4279         bool stopped = false;
4280         int flush_count = 0;
4281         int do_pack = 0;
4282         int rc = 0;
4283
4284         buffer = queue->bufs[queue->next_buf_to_fill];
4285
4286         /* Just a sanity check, the wake/stop logic should ensure that we always
4287          * get a free buffer.
4288          */
4289         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4290                 return -EBUSY;
4291
4292         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4293
4294         /* check if we need to switch packing state of this queue */
4295         qeth_switch_to_packing_if_needed(queue);
4296         if (queue->do_pack) {
4297                 do_pack = 1;
4298                 /* does packet fit in current buffer? */
4299                 if (buffer->next_element_to_fill + elements_needed >
4300                     queue->max_elements) {
4301                         /* ... no -> set state PRIMED */
4302                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4303                         flush_count++;
4304                         queue->next_buf_to_fill =
4305                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4306                         buffer = queue->bufs[queue->next_buf_to_fill];
4307
4308                         /* We stepped forward, so sanity-check again: */
4309                         if (atomic_read(&buffer->state) !=
4310                             QETH_QDIO_BUF_EMPTY) {
4311                                 qeth_flush_buffers(queue, start_index,
4312                                                            flush_count);
4313                                 rc = -EBUSY;
4314                                 goto out;
4315                         }
4316                 }
4317         }
4318
4319         if (buffer->next_element_to_fill == 0 &&
4320             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4321                 /* If a TX completion happens right _here_ and misses to wake
4322                  * the txq, then our re-check below will catch the race.
4323                  */
4324                 QETH_TXQ_STAT_INC(queue, stopped);
4325                 netif_tx_stop_queue(txq);
4326                 stopped = true;
4327         }
4328
4329         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4330         buffer->bytes += qdisc_pkt_len(skb);
4331         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4332
4333         if (queue->do_pack)
4334                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4335         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4336                 flush_count++;
4337                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4338                 queue->next_buf_to_fill =
4339                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4340         }
4341
4342         if (flush_count)
4343                 qeth_flush_buffers(queue, start_index, flush_count);
4344
4345 out:
4346         if (do_pack)
4347                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4348
4349         if (stopped && !qeth_out_queue_is_full(queue))
4350                 netif_tx_start_queue(txq);
4351         return rc;
4352 }
4353 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4354
4355 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4356                               unsigned int payload_len, struct sk_buff *skb,
4357                               unsigned int proto_len)
4358 {
4359         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4360
4361         ext->hdr_tot_len = sizeof(*ext);
4362         ext->imb_hdr_no = 1;
4363         ext->hdr_type = 1;
4364         ext->hdr_version = 1;
4365         ext->hdr_len = 28;
4366         ext->payload_len = payload_len;
4367         ext->mss = skb_shinfo(skb)->gso_size;
4368         ext->dg_hdr_len = proto_len;
4369 }
4370
4371 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4372               struct qeth_qdio_out_q *queue, int ipv,
4373               void (*fill_header)(struct qeth_qdio_out_q *queue,
4374                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4375                                   int ipv, unsigned int data_len))
4376 {
4377         unsigned int proto_len, hw_hdr_len;
4378         unsigned int frame_len = skb->len;
4379         bool is_tso = skb_is_gso(skb);
4380         unsigned int data_offset = 0;
4381         struct qeth_hdr *hdr = NULL;
4382         unsigned int hd_len = 0;
4383         unsigned int elements;
4384         int push_len, rc;
4385
4386         if (is_tso) {
4387                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4388                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4389         } else {
4390                 hw_hdr_len = sizeof(struct qeth_hdr);
4391                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4392         }
4393
4394         rc = skb_cow_head(skb, hw_hdr_len);
4395         if (rc)
4396                 return rc;
4397
4398         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4399                                       &elements);
4400         if (push_len < 0)
4401                 return push_len;
4402         if (is_tso || !push_len) {
4403                 /* HW header needs its own buffer element. */
4404                 hd_len = hw_hdr_len + proto_len;
4405                 data_offset = push_len + proto_len;
4406         }
4407         memset(hdr, 0, hw_hdr_len);
4408         fill_header(queue, hdr, skb, ipv, frame_len);
4409         if (is_tso)
4410                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4411                                   frame_len - proto_len, skb, proto_len);
4412
4413         if (IS_IQD(card)) {
4414                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4415                                  hd_len);
4416         } else {
4417                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4418                 skb_orphan(skb);
4419                 spin_lock(&queue->lock);
4420                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4421                                          hd_len, elements);
4422                 spin_unlock(&queue->lock);
4423         }
4424
4425         if (rc && !push_len)
4426                 kmem_cache_free(qeth_core_header_cache, hdr);
4427
4428         return rc;
4429 }
4430 EXPORT_SYMBOL_GPL(qeth_xmit);
4431
4432 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4433                 struct qeth_reply *reply, unsigned long data)
4434 {
4435         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4436         struct qeth_ipacmd_setadpparms *setparms;
4437
4438         QETH_CARD_TEXT(card, 4, "prmadpcb");
4439
4440         setparms = &(cmd->data.setadapterparms);
4441         if (qeth_setadpparms_inspect_rc(cmd)) {
4442                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4443                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4444         }
4445         card->info.promisc_mode = setparms->data.mode;
4446         return (cmd->hdr.return_code) ? -EIO : 0;
4447 }
4448
4449 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4450 {
4451         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4452                                                     SET_PROMISC_MODE_OFF;
4453         struct qeth_cmd_buffer *iob;
4454         struct qeth_ipa_cmd *cmd;
4455
4456         QETH_CARD_TEXT(card, 4, "setprom");
4457         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4458
4459         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4460                                    SETADP_DATA_SIZEOF(mode));
4461         if (!iob)
4462                 return;
4463         cmd = __ipa_cmd(iob);
4464         cmd->data.setadapterparms.data.mode = mode;
4465         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4466 }
4467 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4468
4469 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4470                 struct qeth_reply *reply, unsigned long data)
4471 {
4472         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4473         struct qeth_ipacmd_setadpparms *adp_cmd;
4474
4475         QETH_CARD_TEXT(card, 4, "chgmaccb");
4476         if (qeth_setadpparms_inspect_rc(cmd))
4477                 return -EIO;
4478
4479         adp_cmd = &cmd->data.setadapterparms;
4480         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4481                 return -EADDRNOTAVAIL;
4482
4483         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4484             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4485                 return -EADDRNOTAVAIL;
4486
4487         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4488         return 0;
4489 }
4490
4491 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4492 {
4493         int rc;
4494         struct qeth_cmd_buffer *iob;
4495         struct qeth_ipa_cmd *cmd;
4496
4497         QETH_CARD_TEXT(card, 4, "chgmac");
4498
4499         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4500                                    SETADP_DATA_SIZEOF(change_addr));
4501         if (!iob)
4502                 return -ENOMEM;
4503         cmd = __ipa_cmd(iob);
4504         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4505         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4506         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4507                         card->dev->dev_addr);
4508         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4509                                NULL);
4510         return rc;
4511 }
4512 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4513
4514 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4515                 struct qeth_reply *reply, unsigned long data)
4516 {
4517         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4518         struct qeth_set_access_ctrl *access_ctrl_req;
4519
4520         QETH_CARD_TEXT(card, 4, "setaccb");
4521
4522         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4523         QETH_CARD_TEXT_(card, 2, "rc=%d",
4524                         cmd->data.setadapterparms.hdr.return_code);
4525         if (cmd->data.setadapterparms.hdr.return_code !=
4526                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4527                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4528                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4529                                  cmd->data.setadapterparms.hdr.return_code);
4530         switch (qeth_setadpparms_inspect_rc(cmd)) {
4531         case SET_ACCESS_CTRL_RC_SUCCESS:
4532                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4533                         dev_info(&card->gdev->dev,
4534                             "QDIO data connection isolation is deactivated\n");
4535                 else
4536                         dev_info(&card->gdev->dev,
4537                             "QDIO data connection isolation is activated\n");
4538                 return 0;
4539         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4540                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4541                                  CARD_DEVID(card));
4542                 return 0;
4543         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4544                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4545                                  CARD_DEVID(card));
4546                 return 0;
4547         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4548                 dev_err(&card->gdev->dev, "Adapter does not "
4549                         "support QDIO data connection isolation\n");
4550                 return -EOPNOTSUPP;
4551         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4552                 dev_err(&card->gdev->dev,
4553                         "Adapter is dedicated. "
4554                         "QDIO data connection isolation not supported\n");
4555                 return -EOPNOTSUPP;
4556         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4557                 dev_err(&card->gdev->dev,
4558                         "TSO does not permit QDIO data connection isolation\n");
4559                 return -EPERM;
4560         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4561                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4562                         "support reflective relay mode\n");
4563                 return -EOPNOTSUPP;
4564         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4565                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4566                                         "enabled at the adjacent switch port");
4567                 return -EREMOTEIO;
4568         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4569                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4570                                         "at the adjacent switch failed\n");
4571                 /* benign error while disabling ISOLATION_MODE_FWD */
4572                 return 0;
4573         default:
4574                 return -EIO;
4575         }
4576 }
4577
4578 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4579                                      enum qeth_ipa_isolation_modes mode)
4580 {
4581         int rc;
4582         struct qeth_cmd_buffer *iob;
4583         struct qeth_ipa_cmd *cmd;
4584         struct qeth_set_access_ctrl *access_ctrl_req;
4585
4586         QETH_CARD_TEXT(card, 4, "setacctl");
4587
4588         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4589                 dev_err(&card->gdev->dev,
4590                         "Adapter does not support QDIO data connection isolation\n");
4591                 return -EOPNOTSUPP;
4592         }
4593
4594         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4595                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4596         if (!iob)
4597                 return -ENOMEM;
4598         cmd = __ipa_cmd(iob);
4599         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4600         access_ctrl_req->subcmd_code = mode;
4601
4602         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4603                                NULL);
4604         if (rc) {
4605                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4606                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4607                                  rc, CARD_DEVID(card));
4608         }
4609
4610         return rc;
4611 }
4612
4613 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4614 {
4615         struct qeth_card *card;
4616
4617         card = dev->ml_priv;
4618         QETH_CARD_TEXT(card, 4, "txtimeo");
4619         qeth_schedule_recovery(card);
4620 }
4621 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4622
4623 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4624 {
4625         struct qeth_card *card = dev->ml_priv;
4626         int rc = 0;
4627
4628         switch (regnum) {
4629         case MII_BMCR: /* Basic mode control register */
4630                 rc = BMCR_FULLDPLX;
4631                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4632                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4633                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4634                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4635                         rc |= BMCR_SPEED100;
4636                 break;
4637         case MII_BMSR: /* Basic mode status register */
4638                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4639                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4640                      BMSR_100BASE4;
4641                 break;
4642         case MII_PHYSID1: /* PHYS ID 1 */
4643                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4644                      dev->dev_addr[2];
4645                 rc = (rc >> 5) & 0xFFFF;
4646                 break;
4647         case MII_PHYSID2: /* PHYS ID 2 */
4648                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4649                 break;
4650         case MII_ADVERTISE: /* Advertisement control reg */
4651                 rc = ADVERTISE_ALL;
4652                 break;
4653         case MII_LPA: /* Link partner ability reg */
4654                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4655                      LPA_100BASE4 | LPA_LPACK;
4656                 break;
4657         case MII_EXPANSION: /* Expansion register */
4658                 break;
4659         case MII_DCOUNTER: /* disconnect counter */
4660                 break;
4661         case MII_FCSCOUNTER: /* false carrier counter */
4662                 break;
4663         case MII_NWAYTEST: /* N-way auto-neg test register */
4664                 break;
4665         case MII_RERRCOUNTER: /* rx error counter */
4666                 rc = card->stats.rx_length_errors +
4667                      card->stats.rx_frame_errors +
4668                      card->stats.rx_fifo_errors;
4669                 break;
4670         case MII_SREVISION: /* silicon revision */
4671                 break;
4672         case MII_RESV1: /* reserved 1 */
4673                 break;
4674         case MII_LBRERROR: /* loopback, rx, bypass error */
4675                 break;
4676         case MII_PHYADDR: /* physical address */
4677                 break;
4678         case MII_RESV2: /* reserved 2 */
4679                 break;
4680         case MII_TPISTATUS: /* TPI status for 10mbps */
4681                 break;
4682         case MII_NCONFIG: /* network interface config */
4683                 break;
4684         default:
4685                 break;
4686         }
4687         return rc;
4688 }
4689
4690 static int qeth_snmp_command_cb(struct qeth_card *card,
4691                                 struct qeth_reply *reply, unsigned long data)
4692 {
4693         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4694         struct qeth_arp_query_info *qinfo = reply->param;
4695         struct qeth_ipacmd_setadpparms *adp_cmd;
4696         unsigned int data_len;
4697         void *snmp_data;
4698
4699         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4700
4701         if (cmd->hdr.return_code) {
4702                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4703                 return -EIO;
4704         }
4705         if (cmd->data.setadapterparms.hdr.return_code) {
4706                 cmd->hdr.return_code =
4707                         cmd->data.setadapterparms.hdr.return_code;
4708                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4709                 return -EIO;
4710         }
4711
4712         adp_cmd = &cmd->data.setadapterparms;
4713         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4714         if (adp_cmd->hdr.seq_no == 1) {
4715                 snmp_data = &adp_cmd->data.snmp;
4716         } else {
4717                 snmp_data = &adp_cmd->data.snmp.request;
4718                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4719         }
4720
4721         /* check if there is enough room in userspace */
4722         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4723                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4724                 return -ENOSPC;
4725         }
4726         QETH_CARD_TEXT_(card, 4, "snore%i",
4727                         cmd->data.setadapterparms.hdr.used_total);
4728         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4729                         cmd->data.setadapterparms.hdr.seq_no);
4730         /*copy entries to user buffer*/
4731         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4732         qinfo->udata_offset += data_len;
4733
4734         if (cmd->data.setadapterparms.hdr.seq_no <
4735             cmd->data.setadapterparms.hdr.used_total)
4736                 return 1;
4737         return 0;
4738 }
4739
4740 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4741 {
4742         struct qeth_snmp_ureq __user *ureq;
4743         struct qeth_cmd_buffer *iob;
4744         unsigned int req_len;
4745         struct qeth_arp_query_info qinfo = {0, };
4746         int rc = 0;
4747
4748         QETH_CARD_TEXT(card, 3, "snmpcmd");
4749
4750         if (IS_VM_NIC(card))
4751                 return -EOPNOTSUPP;
4752
4753         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4754             IS_LAYER3(card))
4755                 return -EOPNOTSUPP;
4756
4757         ureq = (struct qeth_snmp_ureq __user *) udata;
4758         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4759             get_user(req_len, &ureq->hdr.req_len))
4760                 return -EFAULT;
4761
4762         /* Sanitize user input, to avoid overflows in iob size calculation: */
4763         if (req_len > QETH_BUFSIZE)
4764                 return -EINVAL;
4765
4766         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4767         if (!iob)
4768                 return -ENOMEM;
4769
4770         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4771                            &ureq->cmd, req_len)) {
4772                 qeth_put_cmd(iob);
4773                 return -EFAULT;
4774         }
4775
4776         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4777         if (!qinfo.udata) {
4778                 qeth_put_cmd(iob);
4779                 return -ENOMEM;
4780         }
4781         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4782
4783         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4784         if (rc)
4785                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4786                                  CARD_DEVID(card), rc);
4787         else {
4788                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4789                         rc = -EFAULT;
4790         }
4791
4792         kfree(qinfo.udata);
4793         return rc;
4794 }
4795
4796 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4797                                          struct qeth_reply *reply,
4798                                          unsigned long data)
4799 {
4800         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4801         struct qeth_qoat_priv *priv = reply->param;
4802         int resdatalen;
4803
4804         QETH_CARD_TEXT(card, 3, "qoatcb");
4805         if (qeth_setadpparms_inspect_rc(cmd))
4806                 return -EIO;
4807
4808         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4809
4810         if (resdatalen > (priv->buffer_len - priv->response_len))
4811                 return -ENOSPC;
4812
4813         memcpy(priv->buffer + priv->response_len,
4814                &cmd->data.setadapterparms.hdr, resdatalen);
4815         priv->response_len += resdatalen;
4816
4817         if (cmd->data.setadapterparms.hdr.seq_no <
4818             cmd->data.setadapterparms.hdr.used_total)
4819                 return 1;
4820         return 0;
4821 }
4822
4823 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4824 {
4825         int rc = 0;
4826         struct qeth_cmd_buffer *iob;
4827         struct qeth_ipa_cmd *cmd;
4828         struct qeth_query_oat *oat_req;
4829         struct qeth_query_oat_data oat_data;
4830         struct qeth_qoat_priv priv;
4831         void __user *tmp;
4832
4833         QETH_CARD_TEXT(card, 3, "qoatcmd");
4834
4835         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4836                 return -EOPNOTSUPP;
4837
4838         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4839                 return -EFAULT;
4840
4841         priv.buffer_len = oat_data.buffer_len;
4842         priv.response_len = 0;
4843         priv.buffer = vzalloc(oat_data.buffer_len);
4844         if (!priv.buffer)
4845                 return -ENOMEM;
4846
4847         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4848                                    SETADP_DATA_SIZEOF(query_oat));
4849         if (!iob) {
4850                 rc = -ENOMEM;
4851                 goto out_free;
4852         }
4853         cmd = __ipa_cmd(iob);
4854         oat_req = &cmd->data.setadapterparms.data.query_oat;
4855         oat_req->subcmd_code = oat_data.command;
4856
4857         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4858         if (!rc) {
4859                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4860                                          u64_to_user_ptr(oat_data.ptr);
4861                 oat_data.response_len = priv.response_len;
4862
4863                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4864                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4865                         rc = -EFAULT;
4866         }
4867
4868 out_free:
4869         vfree(priv.buffer);
4870         return rc;
4871 }
4872
4873 static int qeth_query_card_info_cb(struct qeth_card *card,
4874                                    struct qeth_reply *reply, unsigned long data)
4875 {
4876         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4877         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4878         struct qeth_query_card_info *card_info;
4879
4880         QETH_CARD_TEXT(card, 2, "qcrdincb");
4881         if (qeth_setadpparms_inspect_rc(cmd))
4882                 return -EIO;
4883
4884         card_info = &cmd->data.setadapterparms.data.card_info;
4885         carrier_info->card_type = card_info->card_type;
4886         carrier_info->port_mode = card_info->port_mode;
4887         carrier_info->port_speed = card_info->port_speed;
4888         return 0;
4889 }
4890
4891 int qeth_query_card_info(struct qeth_card *card,
4892                          struct carrier_info *carrier_info)
4893 {
4894         struct qeth_cmd_buffer *iob;
4895
4896         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4897         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4898                 return -EOPNOTSUPP;
4899         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4900         if (!iob)
4901                 return -ENOMEM;
4902         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4903                                         (void *)carrier_info);
4904 }
4905
4906 /**
4907  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4908  * @card: pointer to a qeth_card
4909  *
4910  * Returns
4911  *      0, if a MAC address has been set for the card's netdevice
4912  *      a return code, for various error conditions
4913  */
4914 int qeth_vm_request_mac(struct qeth_card *card)
4915 {
4916         struct diag26c_mac_resp *response;
4917         struct diag26c_mac_req *request;
4918         int rc;
4919
4920         QETH_CARD_TEXT(card, 2, "vmreqmac");
4921
4922         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4923         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4924         if (!request || !response) {
4925                 rc = -ENOMEM;
4926                 goto out;
4927         }
4928
4929         request->resp_buf_len = sizeof(*response);
4930         request->resp_version = DIAG26C_VERSION2;
4931         request->op_code = DIAG26C_GET_MAC;
4932         request->devno = card->info.ddev_devno;
4933
4934         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4935         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4936         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4937         if (rc)
4938                 goto out;
4939         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4940
4941         if (request->resp_buf_len < sizeof(*response) ||
4942             response->version != request->resp_version) {
4943                 rc = -EIO;
4944                 QETH_CARD_TEXT(card, 2, "badresp");
4945                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4946                               sizeof(request->resp_buf_len));
4947         } else if (!is_valid_ether_addr(response->mac)) {
4948                 rc = -EINVAL;
4949                 QETH_CARD_TEXT(card, 2, "badmac");
4950                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4951         } else {
4952                 ether_addr_copy(card->dev->dev_addr, response->mac);
4953         }
4954
4955 out:
4956         kfree(response);
4957         kfree(request);
4958         return rc;
4959 }
4960 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4961
4962 static void qeth_determine_capabilities(struct qeth_card *card)
4963 {
4964         struct qeth_channel *channel = &card->data;
4965         struct ccw_device *ddev = channel->ccwdev;
4966         int rc;
4967         int ddev_offline = 0;
4968
4969         QETH_CARD_TEXT(card, 2, "detcapab");
4970         if (!ddev->online) {
4971                 ddev_offline = 1;
4972                 rc = qeth_start_channel(channel);
4973                 if (rc) {
4974                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4975                         goto out;
4976                 }
4977         }
4978
4979         rc = qeth_read_conf_data(card);
4980         if (rc) {
4981                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4982                                  CARD_DEVID(card), rc);
4983                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4984                 goto out_offline;
4985         }
4986
4987         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4988         if (rc)
4989                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4990
4991         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4992         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4993         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4994         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4995         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4996         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4997             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4998             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4999                 dev_info(&card->gdev->dev,
5000                         "Completion Queueing supported\n");
5001         } else {
5002                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5003         }
5004
5005
5006 out_offline:
5007         if (ddev_offline == 1)
5008                 qeth_stop_channel(channel);
5009 out:
5010         return;
5011 }
5012
5013 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5014 {
5015         struct qeth_card_info *info = &card->info;
5016         struct ccw_device *cdev = CARD_DDEV(card);
5017         struct ccw_dev_id dev_id;
5018
5019         QETH_CARD_TEXT(card, 2, "ccwconfd");
5020         ccw_device_get_id(cdev, &dev_id);
5021
5022         info->ddev_devno = dev_id.devno;
5023         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5024                           !ccw_device_get_iid(cdev, &info->iid) &&
5025                           !ccw_device_get_chid(cdev, 0, &info->chid);
5026         info->ssid = dev_id.ssid;
5027
5028         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5029                  info->chid, info->chpid);
5030
5031         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5032         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5033         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5034         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5035         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5036         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5037         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5038 }
5039
5040 static int qeth_qdio_establish(struct qeth_card *card)
5041 {
5042         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5043         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5044         struct qdio_initialize init_data;
5045         char *qib_param_field;
5046         unsigned int i;
5047         int rc = 0;
5048
5049         QETH_CARD_TEXT(card, 2, "qdioest");
5050
5051         qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5052         if (!qib_param_field) {
5053                 rc =  -ENOMEM;
5054                 goto out_free_nothing;
5055         }
5056
5057         qeth_create_qib_param_field(card, qib_param_field);
5058         qeth_create_qib_param_field_blkt(card, qib_param_field);
5059
5060         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5061         if (card->options.cq == QETH_CQ_ENABLED)
5062                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5063
5064         for (i = 0; i < card->qdio.no_out_queues; i++)
5065                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5066
5067         memset(&init_data, 0, sizeof(struct qdio_initialize));
5068         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5069                                                           QDIO_QETH_QFMT;
5070         init_data.qib_param_field_format = 0;
5071         init_data.qib_param_field        = qib_param_field;
5072         init_data.no_input_qs            = card->qdio.no_in_queues;
5073         init_data.no_output_qs           = card->qdio.no_out_queues;
5074         init_data.input_handler          = qeth_qdio_input_handler;
5075         init_data.output_handler         = qeth_qdio_output_handler;
5076         init_data.irq_poll               = qeth_qdio_poll;
5077         init_data.int_parm               = (unsigned long) card;
5078         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5079         init_data.output_sbal_addr_array = out_sbal_ptrs;
5080         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5081         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5082
5083         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5084                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5085                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5086                                    init_data.no_output_qs);
5087                 if (rc) {
5088                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5089                         goto out;
5090                 }
5091                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5092                 if (rc) {
5093                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5094                         qdio_free(CARD_DDEV(card));
5095                 }
5096         }
5097
5098         switch (card->options.cq) {
5099         case QETH_CQ_ENABLED:
5100                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5101                 break;
5102         case QETH_CQ_DISABLED:
5103                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5104                 break;
5105         default:
5106                 break;
5107         }
5108 out:
5109         kfree(qib_param_field);
5110 out_free_nothing:
5111         return rc;
5112 }
5113
5114 static void qeth_core_free_card(struct qeth_card *card)
5115 {
5116         QETH_CARD_TEXT(card, 2, "freecrd");
5117
5118         unregister_service_level(&card->qeth_service_level);
5119         debugfs_remove_recursive(card->debugfs);
5120         qeth_put_cmd(card->read_cmd);
5121         destroy_workqueue(card->event_wq);
5122         dev_set_drvdata(&card->gdev->dev, NULL);
5123         kfree(card);
5124 }
5125
5126 void qeth_trace_features(struct qeth_card *card)
5127 {
5128         QETH_CARD_TEXT(card, 2, "features");
5129         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5130         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5131         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5132         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5133                       sizeof(card->info.diagass_support));
5134 }
5135 EXPORT_SYMBOL_GPL(qeth_trace_features);
5136
5137 static struct ccw_device_id qeth_ids[] = {
5138         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5139                                         .driver_info = QETH_CARD_TYPE_OSD},
5140         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5141                                         .driver_info = QETH_CARD_TYPE_IQD},
5142 #ifdef CONFIG_QETH_OSN
5143         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5144                                         .driver_info = QETH_CARD_TYPE_OSN},
5145 #endif
5146         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5147                                         .driver_info = QETH_CARD_TYPE_OSM},
5148 #ifdef CONFIG_QETH_OSX
5149         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5150                                         .driver_info = QETH_CARD_TYPE_OSX},
5151 #endif
5152         {},
5153 };
5154 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5155
5156 static struct ccw_driver qeth_ccw_driver = {
5157         .driver = {
5158                 .owner = THIS_MODULE,
5159                 .name = "qeth",
5160         },
5161         .ids = qeth_ids,
5162         .probe = ccwgroup_probe_ccwdev,
5163         .remove = ccwgroup_remove_ccwdev,
5164 };
5165
5166 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5167 {
5168         int retries = 3;
5169         int rc;
5170
5171         QETH_CARD_TEXT(card, 2, "hrdsetup");
5172         atomic_set(&card->force_alloc_skb, 0);
5173         rc = qeth_update_from_chp_desc(card);
5174         if (rc)
5175                 return rc;
5176 retry:
5177         if (retries < 3)
5178                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5179                                  CARD_DEVID(card));
5180         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5181         qeth_stop_channel(&card->data);
5182         qeth_stop_channel(&card->write);
5183         qeth_stop_channel(&card->read);
5184         qdio_free(CARD_DDEV(card));
5185
5186         rc = qeth_start_channel(&card->read);
5187         if (rc)
5188                 goto retriable;
5189         rc = qeth_start_channel(&card->write);
5190         if (rc)
5191                 goto retriable;
5192         rc = qeth_start_channel(&card->data);
5193         if (rc)
5194                 goto retriable;
5195 retriable:
5196         if (rc == -ERESTARTSYS) {
5197                 QETH_CARD_TEXT(card, 2, "break1");
5198                 return rc;
5199         } else if (rc) {
5200                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5201                 if (--retries < 0)
5202                         goto out;
5203                 else
5204                         goto retry;
5205         }
5206
5207         qeth_determine_capabilities(card);
5208         qeth_read_ccw_conf_data(card);
5209         qeth_idx_init(card);
5210
5211         rc = qeth_idx_activate_read_channel(card);
5212         if (rc == -EINTR) {
5213                 QETH_CARD_TEXT(card, 2, "break2");
5214                 return rc;
5215         } else if (rc) {
5216                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5217                 if (--retries < 0)
5218                         goto out;
5219                 else
5220                         goto retry;
5221         }
5222
5223         rc = qeth_idx_activate_write_channel(card);
5224         if (rc == -EINTR) {
5225                 QETH_CARD_TEXT(card, 2, "break3");
5226                 return rc;
5227         } else if (rc) {
5228                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5229                 if (--retries < 0)
5230                         goto out;
5231                 else
5232                         goto retry;
5233         }
5234         card->read_or_write_problem = 0;
5235         rc = qeth_mpc_initialize(card);
5236         if (rc) {
5237                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5238                 goto out;
5239         }
5240
5241         rc = qeth_send_startlan(card);
5242         if (rc) {
5243                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5244                 if (rc == -ENETDOWN) {
5245                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5246                         *carrier_ok = false;
5247                 } else {
5248                         goto out;
5249                 }
5250         } else {
5251                 *carrier_ok = true;
5252         }
5253
5254         card->options.ipa4.supported = 0;
5255         card->options.ipa6.supported = 0;
5256         card->options.adp.supported = 0;
5257         card->options.sbp.supported_funcs = 0;
5258         card->info.diagass_support = 0;
5259         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5260         if (rc == -ENOMEM)
5261                 goto out;
5262         if (qeth_is_supported(card, IPA_IPV6)) {
5263                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5264                 if (rc == -ENOMEM)
5265                         goto out;
5266         }
5267         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5268                 rc = qeth_query_setadapterparms(card);
5269                 if (rc < 0) {
5270                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5271                         goto out;
5272                 }
5273         }
5274         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5275                 rc = qeth_query_setdiagass(card);
5276                 if (rc)
5277                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5278         }
5279
5280         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5281             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5282                 card->info.hwtrap = 0;
5283
5284         if (card->options.isolation != ISOLATION_MODE_NONE) {
5285                 rc = qeth_setadpparms_set_access_ctrl(card,
5286                                                       card->options.isolation);
5287                 if (rc)
5288                         goto out;
5289         }
5290
5291         rc = qeth_init_qdio_queues(card);
5292         if (rc) {
5293                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5294                 goto out;
5295         }
5296
5297         return 0;
5298 out:
5299         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5300                 "an error on the device\n");
5301         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5302                          CARD_DEVID(card), rc);
5303         return rc;
5304 }
5305 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5306
5307 static int qeth_set_online(struct qeth_card *card)
5308 {
5309         int rc;
5310
5311         mutex_lock(&card->discipline_mutex);
5312         mutex_lock(&card->conf_mutex);
5313         QETH_CARD_TEXT(card, 2, "setonlin");
5314
5315         rc = card->discipline->set_online(card);
5316
5317         mutex_unlock(&card->conf_mutex);
5318         mutex_unlock(&card->discipline_mutex);
5319
5320         return rc;
5321 }
5322
5323 int qeth_set_offline(struct qeth_card *card, bool resetting)
5324 {
5325         int rc, rc2, rc3;
5326
5327         mutex_lock(&card->discipline_mutex);
5328         mutex_lock(&card->conf_mutex);
5329         QETH_CARD_TEXT(card, 3, "setoffl");
5330
5331         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5332                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5333                 card->info.hwtrap = 1;
5334         }
5335
5336         /* cancel any stalled cmd that might block the rtnl: */
5337         qeth_clear_ipacmd_list(card);
5338
5339         rtnl_lock();
5340         card->info.open_when_online = card->dev->flags & IFF_UP;
5341         dev_close(card->dev);
5342         netif_device_detach(card->dev);
5343         netif_carrier_off(card->dev);
5344         rtnl_unlock();
5345
5346         card->discipline->set_offline(card);
5347
5348         rc  = qeth_stop_channel(&card->data);
5349         rc2 = qeth_stop_channel(&card->write);
5350         rc3 = qeth_stop_channel(&card->read);
5351         if (!rc)
5352                 rc = (rc2) ? rc2 : rc3;
5353         if (rc)
5354                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5355         qdio_free(CARD_DDEV(card));
5356
5357         /* let user_space know that device is offline */
5358         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5359
5360         mutex_unlock(&card->conf_mutex);
5361         mutex_unlock(&card->discipline_mutex);
5362         return 0;
5363 }
5364 EXPORT_SYMBOL_GPL(qeth_set_offline);
5365
5366 static int qeth_do_reset(void *data)
5367 {
5368         struct qeth_card *card = data;
5369         int rc;
5370
5371         QETH_CARD_TEXT(card, 2, "recover1");
5372         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5373                 return 0;
5374         QETH_CARD_TEXT(card, 2, "recover2");
5375         dev_warn(&card->gdev->dev,
5376                  "A recovery process has been started for the device\n");
5377
5378         qeth_set_offline(card, true);
5379         rc = qeth_set_online(card);
5380         if (!rc) {
5381                 dev_info(&card->gdev->dev,
5382                          "Device successfully recovered!\n");
5383         } else {
5384                 ccwgroup_set_offline(card->gdev);
5385                 dev_warn(&card->gdev->dev,
5386                          "The qeth device driver failed to recover an error on the device\n");
5387         }
5388         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5389         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5390         return 0;
5391 }
5392
5393 #if IS_ENABLED(CONFIG_QETH_L3)
5394 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5395                                 struct qeth_hdr *hdr)
5396 {
5397         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5398         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5399         struct net_device *dev = skb->dev;
5400
5401         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5402                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5403                                 "FAKELL", skb->len);
5404                 return;
5405         }
5406
5407         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5408                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5409                                                              ETH_P_IP;
5410                 unsigned char tg_addr[ETH_ALEN];
5411
5412                 skb_reset_network_header(skb);
5413                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5414                 case QETH_CAST_MULTICAST:
5415                         if (prot == ETH_P_IP)
5416                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5417                         else
5418                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5419                         QETH_CARD_STAT_INC(card, rx_multicast);
5420                         break;
5421                 case QETH_CAST_BROADCAST:
5422                         ether_addr_copy(tg_addr, dev->broadcast);
5423                         QETH_CARD_STAT_INC(card, rx_multicast);
5424                         break;
5425                 default:
5426                         if (card->options.sniffer)
5427                                 skb->pkt_type = PACKET_OTHERHOST;
5428                         ether_addr_copy(tg_addr, dev->dev_addr);
5429                 }
5430
5431                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5432                         dev_hard_header(skb, dev, prot, tg_addr,
5433                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5434                 else
5435                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5436                                         skb->len);
5437         }
5438
5439         /* copy VLAN tag from hdr into skb */
5440         if (!card->options.sniffer &&
5441             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5442                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5443                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5444                                 l3_hdr->vlan_id :
5445                                 l3_hdr->next_hop.rx.vlan_id;
5446
5447                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5448         }
5449 }
5450 #endif
5451
5452 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5453                              struct qeth_hdr *hdr, bool uses_frags)
5454 {
5455         struct napi_struct *napi = &card->napi;
5456         bool is_cso;
5457
5458         switch (hdr->hdr.l2.id) {
5459         case QETH_HEADER_TYPE_OSN:
5460                 skb_push(skb, sizeof(*hdr));
5461                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5462                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5463                 QETH_CARD_STAT_INC(card, rx_packets);
5464
5465                 card->osn_info.data_cb(skb);
5466                 return;
5467 #if IS_ENABLED(CONFIG_QETH_L3)
5468         case QETH_HEADER_TYPE_LAYER3:
5469                 qeth_l3_rebuild_skb(card, skb, hdr);
5470                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5471                 break;
5472 #endif
5473         case QETH_HEADER_TYPE_LAYER2:
5474                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5475                 break;
5476         default:
5477                 /* never happens */
5478                 if (uses_frags)
5479                         napi_free_frags(napi);
5480                 else
5481                         dev_kfree_skb_any(skb);
5482                 return;
5483         }
5484
5485         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5486                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5487                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5488         } else {
5489                 skb->ip_summed = CHECKSUM_NONE;
5490         }
5491
5492         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5493         QETH_CARD_STAT_INC(card, rx_packets);
5494         if (skb_is_nonlinear(skb)) {
5495                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5496                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5497                                    skb_shinfo(skb)->nr_frags);
5498         }
5499
5500         if (uses_frags) {
5501                 napi_gro_frags(napi);
5502         } else {
5503                 skb->protocol = eth_type_trans(skb, skb->dev);
5504                 napi_gro_receive(napi, skb);
5505         }
5506 }
5507
5508 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5509 {
5510         struct page *page = virt_to_page(data);
5511         unsigned int next_frag;
5512
5513         next_frag = skb_shinfo(skb)->nr_frags;
5514         get_page(page);
5515         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5516                         data_len);
5517 }
5518
5519 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5520 {
5521         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5522 }
5523
5524 static int qeth_extract_skb(struct qeth_card *card,
5525                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5526                             int *__offset)
5527 {
5528         struct qeth_priv *priv = netdev_priv(card->dev);
5529         struct qdio_buffer *buffer = qethbuffer->buffer;
5530         struct napi_struct *napi = &card->napi;
5531         struct qdio_buffer_element *element;
5532         unsigned int linear_len = 0;
5533         bool uses_frags = false;
5534         int offset = *__offset;
5535         bool use_rx_sg = false;
5536         unsigned int headroom;
5537         struct qeth_hdr *hdr;
5538         struct sk_buff *skb;
5539         int skb_len = 0;
5540
5541         element = &buffer->element[*element_no];
5542
5543 next_packet:
5544         /* qeth_hdr must not cross element boundaries */
5545         while (element->length < offset + sizeof(struct qeth_hdr)) {
5546                 if (qeth_is_last_sbale(element))
5547                         return -ENODATA;
5548                 element++;
5549                 offset = 0;
5550         }
5551
5552         hdr = phys_to_virt(element->addr) + offset;
5553         offset += sizeof(*hdr);
5554         skb = NULL;
5555
5556         switch (hdr->hdr.l2.id) {
5557         case QETH_HEADER_TYPE_LAYER2:
5558                 skb_len = hdr->hdr.l2.pkt_length;
5559                 linear_len = ETH_HLEN;
5560                 headroom = 0;
5561                 break;
5562         case QETH_HEADER_TYPE_LAYER3:
5563                 skb_len = hdr->hdr.l3.length;
5564                 if (!IS_LAYER3(card)) {
5565                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5566                         goto walk_packet;
5567                 }
5568
5569                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5570                         linear_len = ETH_HLEN;
5571                         headroom = 0;
5572                         break;
5573                 }
5574
5575                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5576                         linear_len = sizeof(struct ipv6hdr);
5577                 else
5578                         linear_len = sizeof(struct iphdr);
5579                 headroom = ETH_HLEN;
5580                 break;
5581         case QETH_HEADER_TYPE_OSN:
5582                 skb_len = hdr->hdr.osn.pdu_length;
5583                 if (!IS_OSN(card)) {
5584                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5585                         goto walk_packet;
5586                 }
5587
5588                 linear_len = skb_len;
5589                 headroom = sizeof(struct qeth_hdr);
5590                 break;
5591         default:
5592                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5593                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5594                 else
5595                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5596
5597                 /* Can't determine packet length, drop the whole buffer. */
5598                 return -EPROTONOSUPPORT;
5599         }
5600
5601         if (skb_len < linear_len) {
5602                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5603                 goto walk_packet;
5604         }
5605
5606         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5607                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5608                      !atomic_read(&card->force_alloc_skb) &&
5609                      !IS_OSN(card));
5610
5611         if (use_rx_sg) {
5612                 /* QETH_CQ_ENABLED only: */
5613                 if (qethbuffer->rx_skb &&
5614                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5615                         skb = qethbuffer->rx_skb;
5616                         qethbuffer->rx_skb = NULL;
5617                         goto use_skb;
5618                 }
5619
5620                 skb = napi_get_frags(napi);
5621                 if (!skb) {
5622                         /* -ENOMEM, no point in falling back further. */
5623                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5624                         goto walk_packet;
5625                 }
5626
5627                 if (skb_tailroom(skb) >= linear_len + headroom) {
5628                         uses_frags = true;
5629                         goto use_skb;
5630                 }
5631
5632                 netdev_info_once(card->dev,
5633                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5634                                  linear_len + headroom, skb_tailroom(skb));
5635                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5636         }
5637
5638         linear_len = skb_len;
5639         skb = napi_alloc_skb(napi, linear_len + headroom);
5640         if (!skb) {
5641                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5642                 goto walk_packet;
5643         }
5644
5645 use_skb:
5646         if (headroom)
5647                 skb_reserve(skb, headroom);
5648 walk_packet:
5649         while (skb_len) {
5650                 int data_len = min(skb_len, (int)(element->length - offset));
5651                 char *data = phys_to_virt(element->addr) + offset;
5652
5653                 skb_len -= data_len;
5654                 offset += data_len;
5655
5656                 /* Extract data from current element: */
5657                 if (skb && data_len) {
5658                         if (linear_len) {
5659                                 unsigned int copy_len;
5660
5661                                 copy_len = min_t(unsigned int, linear_len,
5662                                                  data_len);
5663
5664                                 skb_put_data(skb, data, copy_len);
5665                                 linear_len -= copy_len;
5666                                 data_len -= copy_len;
5667                                 data += copy_len;
5668                         }
5669
5670                         if (data_len)
5671                                 qeth_create_skb_frag(skb, data, data_len);
5672                 }
5673
5674                 /* Step forward to next element: */
5675                 if (skb_len) {
5676                         if (qeth_is_last_sbale(element)) {
5677                                 QETH_CARD_TEXT(card, 4, "unexeob");
5678                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5679                                 if (skb) {
5680                                         if (uses_frags)
5681                                                 napi_free_frags(napi);
5682                                         else
5683                                                 dev_kfree_skb_any(skb);
5684                                         QETH_CARD_STAT_INC(card,
5685                                                            rx_length_errors);
5686                                 }
5687                                 return -EMSGSIZE;
5688                         }
5689                         element++;
5690                         offset = 0;
5691                 }
5692         }
5693
5694         /* This packet was skipped, go get another one: */
5695         if (!skb)
5696                 goto next_packet;
5697
5698         *element_no = element - &buffer->element[0];
5699         *__offset = offset;
5700
5701         qeth_receive_skb(card, skb, hdr, uses_frags);
5702         return 0;
5703 }
5704
5705 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5706                                       struct qeth_qdio_buffer *buf, bool *done)
5707 {
5708         unsigned int work_done = 0;
5709
5710         while (budget) {
5711                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5712                                      &card->rx.e_offset)) {
5713                         *done = true;
5714                         break;
5715                 }
5716
5717                 work_done++;
5718                 budget--;
5719         }
5720
5721         return work_done;
5722 }
5723
5724 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5725 {
5726         struct qeth_rx *ctx = &card->rx;
5727         unsigned int work_done = 0;
5728
5729         while (budget > 0) {
5730                 struct qeth_qdio_buffer *buffer;
5731                 unsigned int skbs_done = 0;
5732                 bool done = false;
5733
5734                 /* Fetch completed RX buffers: */
5735                 if (!card->rx.b_count) {
5736                         card->rx.qdio_err = 0;
5737                         card->rx.b_count = qdio_get_next_buffers(
5738                                 card->data.ccwdev, 0, &card->rx.b_index,
5739                                 &card->rx.qdio_err);
5740                         if (card->rx.b_count <= 0) {
5741                                 card->rx.b_count = 0;
5742                                 break;
5743                         }
5744                 }
5745
5746                 /* Process one completed RX buffer: */
5747                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5748                 if (!(card->rx.qdio_err &&
5749                       qeth_check_qdio_errors(card, buffer->buffer,
5750                                              card->rx.qdio_err, "qinerr")))
5751                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5752                                                       &done);
5753                 else
5754                         done = true;
5755
5756                 work_done += skbs_done;
5757                 budget -= skbs_done;
5758
5759                 if (done) {
5760                         QETH_CARD_STAT_INC(card, rx_bufs);
5761                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5762                         buffer->pool_entry = NULL;
5763                         card->rx.b_count--;
5764                         ctx->bufs_refill++;
5765                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5766                                                                  ctx->bufs_refill);
5767
5768                         /* Step forward to next buffer: */
5769                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5770                         card->rx.buf_element = 0;
5771                         card->rx.e_offset = 0;
5772                 }
5773         }
5774
5775         return work_done;
5776 }
5777
5778 static void qeth_cq_poll(struct qeth_card *card)
5779 {
5780         unsigned int work_done = 0;
5781
5782         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5783                 unsigned int start, error;
5784                 int completed;
5785
5786                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5787                                                &error);
5788                 if (completed <= 0)
5789                         return;
5790
5791                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5792                 work_done += completed;
5793         }
5794 }
5795
5796 int qeth_poll(struct napi_struct *napi, int budget)
5797 {
5798         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5799         unsigned int work_done;
5800
5801         work_done = qeth_rx_poll(card, budget);
5802
5803         if (card->options.cq == QETH_CQ_ENABLED)
5804                 qeth_cq_poll(card);
5805
5806         if (budget) {
5807                 struct qeth_rx *ctx = &card->rx;
5808
5809                 /* Process any substantial refill backlog: */
5810                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5811
5812                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5813                 if (work_done >= budget)
5814                         return work_done;
5815         }
5816
5817         if (napi_complete_done(napi, work_done) &&
5818             qdio_start_irq(CARD_DDEV(card)))
5819                 napi_schedule(napi);
5820
5821         return work_done;
5822 }
5823 EXPORT_SYMBOL_GPL(qeth_poll);
5824
5825 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5826                                  unsigned int bidx, bool error, int budget)
5827 {
5828         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5829         u8 sflags = buffer->buffer->element[15].sflags;
5830         struct qeth_card *card = queue->card;
5831
5832         if (queue->bufstates && (queue->bufstates[bidx].flags &
5833                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5834                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5835
5836                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5837                                                    QETH_QDIO_BUF_PENDING) ==
5838                     QETH_QDIO_BUF_PRIMED)
5839                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5840
5841                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5842
5843                 /* prepare the queue slot for re-use: */
5844                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5845                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5846                         QETH_CARD_TEXT(card, 2, "outofbuf");
5847                         qeth_schedule_recovery(card);
5848                 }
5849
5850                 return;
5851         }
5852
5853         if (card->options.cq == QETH_CQ_ENABLED)
5854                 qeth_notify_skbs(queue, buffer,
5855                                  qeth_compute_cq_notification(sflags, 0));
5856         qeth_clear_output_buffer(queue, buffer, error, budget);
5857 }
5858
5859 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5860 {
5861         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5862         unsigned int queue_no = queue->queue_no;
5863         struct qeth_card *card = queue->card;
5864         struct net_device *dev = card->dev;
5865         unsigned int work_done = 0;
5866         struct netdev_queue *txq;
5867
5868         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5869
5870         while (1) {
5871                 unsigned int start, error, i;
5872                 unsigned int packets = 0;
5873                 unsigned int bytes = 0;
5874                 int completed;
5875
5876                 if (qeth_out_queue_is_empty(queue)) {
5877                         napi_complete(napi);
5878                         return 0;
5879                 }
5880
5881                 /* Give the CPU a breather: */
5882                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5883                         QETH_TXQ_STAT_INC(queue, completion_yield);
5884                         if (napi_complete_done(napi, 0))
5885                                 napi_schedule(napi);
5886                         return 0;
5887                 }
5888
5889                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5890                                                &start, &error);
5891                 if (completed <= 0) {
5892                         /* Ensure we see TX completion for pending work: */
5893                         if (napi_complete_done(napi, 0))
5894                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5895                         return 0;
5896                 }
5897
5898                 for (i = start; i < start + completed; i++) {
5899                         struct qeth_qdio_out_buffer *buffer;
5900                         unsigned int bidx = QDIO_BUFNR(i);
5901
5902                         buffer = queue->bufs[bidx];
5903                         packets += buffer->frames;
5904                         bytes += buffer->bytes;
5905
5906                         qeth_handle_send_error(card, buffer, error);
5907                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5908                         qeth_cleanup_handled_pending(queue, bidx, false);
5909                 }
5910
5911                 netdev_tx_completed_queue(txq, packets, bytes);
5912                 atomic_sub(completed, &queue->used_buffers);
5913                 work_done += completed;
5914
5915                 /* xmit may have observed the full-condition, but not yet
5916                  * stopped the txq. In which case the code below won't trigger.
5917                  * So before returning, xmit will re-check the txq's fill level
5918                  * and wake it up if needed.
5919                  */
5920                 if (netif_tx_queue_stopped(txq) &&
5921                     !qeth_out_queue_is_full(queue))
5922                         netif_tx_wake_queue(txq);
5923         }
5924 }
5925
5926 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5927 {
5928         if (!cmd->hdr.return_code)
5929                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5930         return cmd->hdr.return_code;
5931 }
5932
5933 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5934                                         struct qeth_reply *reply,
5935                                         unsigned long data)
5936 {
5937         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5938         struct qeth_ipa_caps *caps = reply->param;
5939
5940         if (qeth_setassparms_inspect_rc(cmd))
5941                 return -EIO;
5942
5943         caps->supported = cmd->data.setassparms.data.caps.supported;
5944         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5945         return 0;
5946 }
5947
5948 int qeth_setassparms_cb(struct qeth_card *card,
5949                         struct qeth_reply *reply, unsigned long data)
5950 {
5951         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5952
5953         QETH_CARD_TEXT(card, 4, "defadpcb");
5954
5955         if (cmd->hdr.return_code)
5956                 return -EIO;
5957
5958         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5959         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5960                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
5961         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5962                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
5963         return 0;
5964 }
5965 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5966
5967 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5968                                                  enum qeth_ipa_funcs ipa_func,
5969                                                  u16 cmd_code,
5970                                                  unsigned int data_length,
5971                                                  enum qeth_prot_versions prot)
5972 {
5973         struct qeth_ipacmd_setassparms *setassparms;
5974         struct qeth_ipacmd_setassparms_hdr *hdr;
5975         struct qeth_cmd_buffer *iob;
5976
5977         QETH_CARD_TEXT(card, 4, "getasscm");
5978         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5979                                  data_length +
5980                                  offsetof(struct qeth_ipacmd_setassparms,
5981                                           data));
5982         if (!iob)
5983                 return NULL;
5984
5985         setassparms = &__ipa_cmd(iob)->data.setassparms;
5986         setassparms->assist_no = ipa_func;
5987
5988         hdr = &setassparms->hdr;
5989         hdr->length = sizeof(*hdr) + data_length;
5990         hdr->command_code = cmd_code;
5991         return iob;
5992 }
5993 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5994
5995 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5996                                       enum qeth_ipa_funcs ipa_func,
5997                                       u16 cmd_code, u32 *data,
5998                                       enum qeth_prot_versions prot)
5999 {
6000         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6001         struct qeth_cmd_buffer *iob;
6002
6003         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6004         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6005         if (!iob)
6006                 return -ENOMEM;
6007
6008         if (data)
6009                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6010         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6011 }
6012 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6013
6014 static void qeth_unregister_dbf_views(void)
6015 {
6016         int x;
6017         for (x = 0; x < QETH_DBF_INFOS; x++) {
6018                 debug_unregister(qeth_dbf[x].id);
6019                 qeth_dbf[x].id = NULL;
6020         }
6021 }
6022
6023 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6024 {
6025         char dbf_txt_buf[32];
6026         va_list args;
6027
6028         if (!debug_level_enabled(id, level))
6029                 return;
6030         va_start(args, fmt);
6031         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6032         va_end(args);
6033         debug_text_event(id, level, dbf_txt_buf);
6034 }
6035 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6036
6037 static int qeth_register_dbf_views(void)
6038 {
6039         int ret;
6040         int x;
6041
6042         for (x = 0; x < QETH_DBF_INFOS; x++) {
6043                 /* register the areas */
6044                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6045                                                 qeth_dbf[x].pages,
6046                                                 qeth_dbf[x].areas,
6047                                                 qeth_dbf[x].len);
6048                 if (qeth_dbf[x].id == NULL) {
6049                         qeth_unregister_dbf_views();
6050                         return -ENOMEM;
6051                 }
6052
6053                 /* register a view */
6054                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6055                 if (ret) {
6056                         qeth_unregister_dbf_views();
6057                         return ret;
6058                 }
6059
6060                 /* set a passing level */
6061                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6062         }
6063
6064         return 0;
6065 }
6066
6067 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6068
6069 int qeth_core_load_discipline(struct qeth_card *card,
6070                 enum qeth_discipline_id discipline)
6071 {
6072         mutex_lock(&qeth_mod_mutex);
6073         switch (discipline) {
6074         case QETH_DISCIPLINE_LAYER3:
6075                 card->discipline = try_then_request_module(
6076                         symbol_get(qeth_l3_discipline), "qeth_l3");
6077                 break;
6078         case QETH_DISCIPLINE_LAYER2:
6079                 card->discipline = try_then_request_module(
6080                         symbol_get(qeth_l2_discipline), "qeth_l2");
6081                 break;
6082         default:
6083                 break;
6084         }
6085         mutex_unlock(&qeth_mod_mutex);
6086
6087         if (!card->discipline) {
6088                 dev_err(&card->gdev->dev, "There is no kernel module to "
6089                         "support discipline %d\n", discipline);
6090                 return -EINVAL;
6091         }
6092
6093         card->options.layer = discipline;
6094         return 0;
6095 }
6096
6097 void qeth_core_free_discipline(struct qeth_card *card)
6098 {
6099         if (IS_LAYER2(card))
6100                 symbol_put(qeth_l2_discipline);
6101         else
6102                 symbol_put(qeth_l3_discipline);
6103         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6104         card->discipline = NULL;
6105 }
6106
6107 const struct device_type qeth_generic_devtype = {
6108         .name = "qeth_generic",
6109         .groups = qeth_generic_attr_groups,
6110 };
6111 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6112
6113 static const struct device_type qeth_osn_devtype = {
6114         .name = "qeth_osn",
6115         .groups = qeth_osn_attr_groups,
6116 };
6117
6118 #define DBF_NAME_LEN    20
6119
6120 struct qeth_dbf_entry {
6121         char dbf_name[DBF_NAME_LEN];
6122         debug_info_t *dbf_info;
6123         struct list_head dbf_list;
6124 };
6125
6126 static LIST_HEAD(qeth_dbf_list);
6127 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6128
6129 static debug_info_t *qeth_get_dbf_entry(char *name)
6130 {
6131         struct qeth_dbf_entry *entry;
6132         debug_info_t *rc = NULL;
6133
6134         mutex_lock(&qeth_dbf_list_mutex);
6135         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6136                 if (strcmp(entry->dbf_name, name) == 0) {
6137                         rc = entry->dbf_info;
6138                         break;
6139                 }
6140         }
6141         mutex_unlock(&qeth_dbf_list_mutex);
6142         return rc;
6143 }
6144
6145 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6146 {
6147         struct qeth_dbf_entry *new_entry;
6148
6149         card->debug = debug_register(name, 2, 1, 8);
6150         if (!card->debug) {
6151                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6152                 goto err;
6153         }
6154         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6155                 goto err_dbg;
6156         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6157         if (!new_entry)
6158                 goto err_dbg;
6159         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6160         new_entry->dbf_info = card->debug;
6161         mutex_lock(&qeth_dbf_list_mutex);
6162         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6163         mutex_unlock(&qeth_dbf_list_mutex);
6164
6165         return 0;
6166
6167 err_dbg:
6168         debug_unregister(card->debug);
6169 err:
6170         return -ENOMEM;
6171 }
6172
6173 static void qeth_clear_dbf_list(void)
6174 {
6175         struct qeth_dbf_entry *entry, *tmp;
6176
6177         mutex_lock(&qeth_dbf_list_mutex);
6178         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6179                 list_del(&entry->dbf_list);
6180                 debug_unregister(entry->dbf_info);
6181                 kfree(entry);
6182         }
6183         mutex_unlock(&qeth_dbf_list_mutex);
6184 }
6185
6186 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6187 {
6188         struct net_device *dev;
6189         struct qeth_priv *priv;
6190
6191         switch (card->info.type) {
6192         case QETH_CARD_TYPE_IQD:
6193                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6194                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6195                 break;
6196         case QETH_CARD_TYPE_OSM:
6197                 dev = alloc_etherdev(sizeof(*priv));
6198                 break;
6199         case QETH_CARD_TYPE_OSN:
6200                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6201                                    ether_setup);
6202                 break;
6203         default:
6204                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6205         }
6206
6207         if (!dev)
6208                 return NULL;
6209
6210         priv = netdev_priv(dev);
6211         priv->rx_copybreak = QETH_RX_COPYBREAK;
6212
6213         dev->ml_priv = card;
6214         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6215         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6216          /* initialized when device first goes online: */
6217         dev->max_mtu = 0;
6218         dev->mtu = 0;
6219         SET_NETDEV_DEV(dev, &card->gdev->dev);
6220         netif_carrier_off(dev);
6221
6222         dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
6223                                           &qeth_ethtool_ops;
6224
6225         return dev;
6226 }
6227
6228 struct net_device *qeth_clone_netdev(struct net_device *orig)
6229 {
6230         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6231
6232         if (!clone)
6233                 return NULL;
6234
6235         clone->dev_port = orig->dev_port;
6236         return clone;
6237 }
6238
6239 int qeth_setup_netdev(struct qeth_card *card)
6240 {
6241         struct net_device *dev = card->dev;
6242         unsigned int num_tx_queues;
6243
6244         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6245         dev->hw_features |= NETIF_F_SG;
6246         dev->vlan_features |= NETIF_F_SG;
6247
6248         if (IS_IQD(card)) {
6249                 dev->features |= NETIF_F_SG;
6250                 num_tx_queues = QETH_IQD_MIN_TXQ;
6251         } else if (IS_VM_NIC(card)) {
6252                 num_tx_queues = 1;
6253         } else {
6254                 num_tx_queues = dev->real_num_tx_queues;
6255         }
6256
6257         return qeth_set_real_num_tx_queues(card, num_tx_queues);
6258 }
6259 EXPORT_SYMBOL_GPL(qeth_setup_netdev);
6260
6261 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6262 {
6263         struct qeth_card *card;
6264         struct device *dev;
6265         int rc;
6266         enum qeth_discipline_id enforced_disc;
6267         char dbf_name[DBF_NAME_LEN];
6268
6269         QETH_DBF_TEXT(SETUP, 2, "probedev");
6270
6271         dev = &gdev->dev;
6272         if (!get_device(dev))
6273                 return -ENODEV;
6274
6275         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6276
6277         card = qeth_alloc_card(gdev);
6278         if (!card) {
6279                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6280                 rc = -ENOMEM;
6281                 goto err_dev;
6282         }
6283
6284         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6285                 dev_name(&gdev->dev));
6286         card->debug = qeth_get_dbf_entry(dbf_name);
6287         if (!card->debug) {
6288                 rc = qeth_add_dbf_entry(card, dbf_name);
6289                 if (rc)
6290                         goto err_card;
6291         }
6292
6293         qeth_setup_card(card);
6294         card->dev = qeth_alloc_netdev(card);
6295         if (!card->dev) {
6296                 rc = -ENOMEM;
6297                 goto err_card;
6298         }
6299
6300         qeth_determine_capabilities(card);
6301         qeth_set_blkt_defaults(card);
6302
6303         card->qdio.no_out_queues = card->dev->num_tx_queues;
6304         rc = qeth_update_from_chp_desc(card);
6305         if (rc)
6306                 goto err_chp_desc;
6307
6308         enforced_disc = qeth_enforce_discipline(card);
6309         switch (enforced_disc) {
6310         case QETH_DISCIPLINE_UNDETERMINED:
6311                 gdev->dev.type = &qeth_generic_devtype;
6312                 break;
6313         default:
6314                 card->info.layer_enforced = true;
6315                 rc = qeth_core_load_discipline(card, enforced_disc);
6316                 if (rc)
6317                         goto err_load;
6318
6319                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6320                                                 card->discipline->devtype;
6321                 rc = card->discipline->setup(card->gdev);
6322                 if (rc)
6323                         goto err_disc;
6324                 break;
6325         }
6326
6327         return 0;
6328
6329 err_disc:
6330         qeth_core_free_discipline(card);
6331 err_load:
6332 err_chp_desc:
6333         free_netdev(card->dev);
6334 err_card:
6335         qeth_core_free_card(card);
6336 err_dev:
6337         put_device(dev);
6338         return rc;
6339 }
6340
6341 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6342 {
6343         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6344
6345         QETH_CARD_TEXT(card, 2, "removedv");
6346
6347         if (card->discipline) {
6348                 card->discipline->remove(gdev);
6349                 qeth_core_free_discipline(card);
6350         }
6351
6352         qeth_free_qdio_queues(card);
6353
6354         free_netdev(card->dev);
6355         qeth_core_free_card(card);
6356         put_device(&gdev->dev);
6357 }
6358
6359 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6360 {
6361         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6362         int rc = 0;
6363         enum qeth_discipline_id def_discipline;
6364
6365         if (!card->discipline) {
6366                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6367                                                 QETH_DISCIPLINE_LAYER2;
6368                 rc = qeth_core_load_discipline(card, def_discipline);
6369                 if (rc)
6370                         goto err;
6371                 rc = card->discipline->setup(card->gdev);
6372                 if (rc) {
6373                         qeth_core_free_discipline(card);
6374                         goto err;
6375                 }
6376         }
6377
6378         rc = qeth_set_online(card);
6379 err:
6380         return rc;
6381 }
6382
6383 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6384 {
6385         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6386
6387         return qeth_set_offline(card, false);
6388 }
6389
6390 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6391 {
6392         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6393         qeth_set_allowed_threads(card, 0, 1);
6394         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6395                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6396         qeth_qdio_clear_card(card, 0);
6397         qeth_drain_output_queues(card);
6398         qdio_free(CARD_DDEV(card));
6399 }
6400
6401 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6402                            size_t count)
6403 {
6404         int err;
6405
6406         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6407                                   buf);
6408
6409         return err ? err : count;
6410 }
6411 static DRIVER_ATTR_WO(group);
6412
6413 static struct attribute *qeth_drv_attrs[] = {
6414         &driver_attr_group.attr,
6415         NULL,
6416 };
6417 static struct attribute_group qeth_drv_attr_group = {
6418         .attrs = qeth_drv_attrs,
6419 };
6420 static const struct attribute_group *qeth_drv_attr_groups[] = {
6421         &qeth_drv_attr_group,
6422         NULL,
6423 };
6424
6425 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6426         .driver = {
6427                 .groups = qeth_drv_attr_groups,
6428                 .owner = THIS_MODULE,
6429                 .name = "qeth",
6430         },
6431         .ccw_driver = &qeth_ccw_driver,
6432         .setup = qeth_core_probe_device,
6433         .remove = qeth_core_remove_device,
6434         .set_online = qeth_core_set_online,
6435         .set_offline = qeth_core_set_offline,
6436         .shutdown = qeth_core_shutdown,
6437 };
6438
6439 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6440 {
6441         struct ccwgroup_device *gdev;
6442         struct qeth_card *card;
6443
6444         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6445         if (!gdev)
6446                 return NULL;
6447
6448         card = dev_get_drvdata(&gdev->dev);
6449         put_device(&gdev->dev);
6450         return card;
6451 }
6452 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6453
6454 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6455 {
6456         struct qeth_card *card = dev->ml_priv;
6457         struct mii_ioctl_data *mii_data;
6458         int rc = 0;
6459
6460         switch (cmd) {
6461         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6462                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6463                 break;
6464         case SIOC_QETH_GET_CARD_TYPE:
6465                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6466                     !IS_VM_NIC(card))
6467                         return 1;
6468                 return 0;
6469         case SIOCGMIIPHY:
6470                 mii_data = if_mii(rq);
6471                 mii_data->phy_id = 0;
6472                 break;
6473         case SIOCGMIIREG:
6474                 mii_data = if_mii(rq);
6475                 if (mii_data->phy_id != 0)
6476                         rc = -EINVAL;
6477                 else
6478                         mii_data->val_out = qeth_mdio_read(dev,
6479                                 mii_data->phy_id, mii_data->reg_num);
6480                 break;
6481         case SIOC_QETH_QUERY_OAT:
6482                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6483                 break;
6484         default:
6485                 if (card->discipline->do_ioctl)
6486                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6487                 else
6488                         rc = -EOPNOTSUPP;
6489         }
6490         if (rc)
6491                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6492         return rc;
6493 }
6494 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6495
6496 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6497                               unsigned long data)
6498 {
6499         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6500         u32 *features = reply->param;
6501
6502         if (qeth_setassparms_inspect_rc(cmd))
6503                 return -EIO;
6504
6505         *features = cmd->data.setassparms.data.flags_32bit;
6506         return 0;
6507 }
6508
6509 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6510                              enum qeth_prot_versions prot)
6511 {
6512         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6513                                                  NULL, prot);
6514 }
6515
6516 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6517                             enum qeth_prot_versions prot, u8 *lp2lp)
6518 {
6519         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6520         struct qeth_cmd_buffer *iob;
6521         struct qeth_ipa_caps caps;
6522         u32 features;
6523         int rc;
6524
6525         /* some L3 HW requires combined L3+L4 csum offload: */
6526         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6527             cstype == IPA_OUTBOUND_CHECKSUM)
6528                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6529
6530         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6531                                        prot);
6532         if (!iob)
6533                 return -ENOMEM;
6534
6535         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6536         if (rc)
6537                 return rc;
6538
6539         if ((required_features & features) != required_features) {
6540                 qeth_set_csum_off(card, cstype, prot);
6541                 return -EOPNOTSUPP;
6542         }
6543
6544         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6545                                        SETASS_DATA_SIZEOF(flags_32bit),
6546                                        prot);
6547         if (!iob) {
6548                 qeth_set_csum_off(card, cstype, prot);
6549                 return -ENOMEM;
6550         }
6551
6552         if (features & QETH_IPA_CHECKSUM_LP2LP)
6553                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6554         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6555         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6556         if (rc) {
6557                 qeth_set_csum_off(card, cstype, prot);
6558                 return rc;
6559         }
6560
6561         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6562             !qeth_ipa_caps_enabled(&caps, required_features)) {
6563                 qeth_set_csum_off(card, cstype, prot);
6564                 return -EOPNOTSUPP;
6565         }
6566
6567         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6568                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6569
6570         if (lp2lp)
6571                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6572
6573         return 0;
6574 }
6575
6576 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6577                              enum qeth_prot_versions prot, u8 *lp2lp)
6578 {
6579         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6580                     qeth_set_csum_off(card, cstype, prot);
6581 }
6582
6583 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6584                              unsigned long data)
6585 {
6586         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6587         struct qeth_tso_start_data *tso_data = reply->param;
6588
6589         if (qeth_setassparms_inspect_rc(cmd))
6590                 return -EIO;
6591
6592         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6593         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6594         return 0;
6595 }
6596
6597 static int qeth_set_tso_off(struct qeth_card *card,
6598                             enum qeth_prot_versions prot)
6599 {
6600         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6601                                                  IPA_CMD_ASS_STOP, NULL, prot);
6602 }
6603
6604 static int qeth_set_tso_on(struct qeth_card *card,
6605                            enum qeth_prot_versions prot)
6606 {
6607         struct qeth_tso_start_data tso_data;
6608         struct qeth_cmd_buffer *iob;
6609         struct qeth_ipa_caps caps;
6610         int rc;
6611
6612         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6613                                        IPA_CMD_ASS_START, 0, prot);
6614         if (!iob)
6615                 return -ENOMEM;
6616
6617         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6618         if (rc)
6619                 return rc;
6620
6621         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6622                 qeth_set_tso_off(card, prot);
6623                 return -EOPNOTSUPP;
6624         }
6625
6626         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6627                                        IPA_CMD_ASS_ENABLE,
6628                                        SETASS_DATA_SIZEOF(caps), prot);
6629         if (!iob) {
6630                 qeth_set_tso_off(card, prot);
6631                 return -ENOMEM;
6632         }
6633
6634         /* enable TSO capability */
6635         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6636                 QETH_IPA_LARGE_SEND_TCP;
6637         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6638         if (rc) {
6639                 qeth_set_tso_off(card, prot);
6640                 return rc;
6641         }
6642
6643         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6644             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6645                 qeth_set_tso_off(card, prot);
6646                 return -EOPNOTSUPP;
6647         }
6648
6649         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6650                  tso_data.mss);
6651         return 0;
6652 }
6653
6654 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6655                             enum qeth_prot_versions prot)
6656 {
6657         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6658 }
6659
6660 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6661 {
6662         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6663         int rc_ipv6;
6664
6665         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6666                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6667                                             QETH_PROT_IPV4, NULL);
6668         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6669                 /* no/one Offload Assist available, so the rc is trivial */
6670                 return rc_ipv4;
6671
6672         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6673                                     QETH_PROT_IPV6, NULL);
6674
6675         if (on)
6676                 /* enable: success if any Assist is active */
6677                 return (rc_ipv6) ? rc_ipv4 : 0;
6678
6679         /* disable: failure if any Assist is still active */
6680         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6681 }
6682
6683 /**
6684  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6685  * @dev:        a net_device
6686  */
6687 void qeth_enable_hw_features(struct net_device *dev)
6688 {
6689         struct qeth_card *card = dev->ml_priv;
6690         netdev_features_t features;
6691
6692         features = dev->features;
6693         /* force-off any feature that might need an IPA sequence.
6694          * netdev_update_features() will restart them.
6695          */
6696         dev->features &= ~dev->hw_features;
6697         /* toggle VLAN filter, so that VIDs are re-programmed: */
6698         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6699                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6700                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6701         }
6702         netdev_update_features(dev);
6703         if (features != dev->features)
6704                 dev_warn(&card->gdev->dev,
6705                          "Device recovery failed to restore all offload features\n");
6706 }
6707 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6708
6709 static void qeth_check_restricted_features(struct qeth_card *card,
6710                                            netdev_features_t changed,
6711                                            netdev_features_t actual)
6712 {
6713         netdev_features_t ipv6_features = NETIF_F_TSO6;
6714         netdev_features_t ipv4_features = NETIF_F_TSO;
6715
6716         if (!card->info.has_lp2lp_cso_v6)
6717                 ipv6_features |= NETIF_F_IPV6_CSUM;
6718         if (!card->info.has_lp2lp_cso_v4)
6719                 ipv4_features |= NETIF_F_IP_CSUM;
6720
6721         if ((changed & ipv6_features) && !(actual & ipv6_features))
6722                 qeth_flush_local_addrs6(card);
6723         if ((changed & ipv4_features) && !(actual & ipv4_features))
6724                 qeth_flush_local_addrs4(card);
6725 }
6726
6727 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6728 {
6729         struct qeth_card *card = dev->ml_priv;
6730         netdev_features_t changed = dev->features ^ features;
6731         int rc = 0;
6732
6733         QETH_CARD_TEXT(card, 2, "setfeat");
6734         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6735
6736         if ((changed & NETIF_F_IP_CSUM)) {
6737                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6738                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6739                                        &card->info.has_lp2lp_cso_v4);
6740                 if (rc)
6741                         changed ^= NETIF_F_IP_CSUM;
6742         }
6743         if (changed & NETIF_F_IPV6_CSUM) {
6744                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6745                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6746                                        &card->info.has_lp2lp_cso_v6);
6747                 if (rc)
6748                         changed ^= NETIF_F_IPV6_CSUM;
6749         }
6750         if (changed & NETIF_F_RXCSUM) {
6751                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6752                 if (rc)
6753                         changed ^= NETIF_F_RXCSUM;
6754         }
6755         if (changed & NETIF_F_TSO) {
6756                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6757                                       QETH_PROT_IPV4);
6758                 if (rc)
6759                         changed ^= NETIF_F_TSO;
6760         }
6761         if (changed & NETIF_F_TSO6) {
6762                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6763                                       QETH_PROT_IPV6);
6764                 if (rc)
6765                         changed ^= NETIF_F_TSO6;
6766         }
6767
6768         qeth_check_restricted_features(card, dev->features ^ features,
6769                                        dev->features ^ changed);
6770
6771         /* everything changed successfully? */
6772         if ((dev->features ^ features) == changed)
6773                 return 0;
6774         /* something went wrong. save changed features and return error */
6775         dev->features ^= changed;
6776         return -EIO;
6777 }
6778 EXPORT_SYMBOL_GPL(qeth_set_features);
6779
6780 netdev_features_t qeth_fix_features(struct net_device *dev,
6781                                     netdev_features_t features)
6782 {
6783         struct qeth_card *card = dev->ml_priv;
6784
6785         QETH_CARD_TEXT(card, 2, "fixfeat");
6786         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6787                 features &= ~NETIF_F_IP_CSUM;
6788         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6789                 features &= ~NETIF_F_IPV6_CSUM;
6790         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6791             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6792                 features &= ~NETIF_F_RXCSUM;
6793         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6794                 features &= ~NETIF_F_TSO;
6795         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6796                 features &= ~NETIF_F_TSO6;
6797
6798         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6799         return features;
6800 }
6801 EXPORT_SYMBOL_GPL(qeth_fix_features);
6802
6803 netdev_features_t qeth_features_check(struct sk_buff *skb,
6804                                       struct net_device *dev,
6805                                       netdev_features_t features)
6806 {
6807         struct qeth_card *card = dev->ml_priv;
6808
6809         /* Traffic with local next-hop is not eligible for some offloads: */
6810         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6811             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6812                 netdev_features_t restricted = 0;
6813
6814                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6815                         restricted |= NETIF_F_ALL_TSO;
6816
6817                 switch (vlan_get_protocol(skb)) {
6818                 case htons(ETH_P_IP):
6819                         if (!card->info.has_lp2lp_cso_v4)
6820                                 restricted |= NETIF_F_IP_CSUM;
6821
6822                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6823                                 features &= ~restricted;
6824                         break;
6825                 case htons(ETH_P_IPV6):
6826                         if (!card->info.has_lp2lp_cso_v6)
6827                                 restricted |= NETIF_F_IPV6_CSUM;
6828
6829                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6830                                 features &= ~restricted;
6831                         break;
6832                 default:
6833                         break;
6834                 }
6835         }
6836
6837         /* GSO segmentation builds skbs with
6838          *      a (small) linear part for the headers, and
6839          *      page frags for the data.
6840          * Compared to a linear skb, the header-only part consumes an
6841          * additional buffer element. This reduces buffer utilization, and
6842          * hurts throughput. So compress small segments into one element.
6843          */
6844         if (netif_needs_gso(skb, features)) {
6845                 /* match skb_segment(): */
6846                 unsigned int doffset = skb->data - skb_mac_header(skb);
6847                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6848                 unsigned int hroom = skb_headroom(skb);
6849
6850                 /* linearize only if resulting skb allocations are order-0: */
6851                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6852                         features &= ~NETIF_F_SG;
6853         }
6854
6855         return vlan_features_check(skb, features);
6856 }
6857 EXPORT_SYMBOL_GPL(qeth_features_check);
6858
6859 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6860 {
6861         struct qeth_card *card = dev->ml_priv;
6862         struct qeth_qdio_out_q *queue;
6863         unsigned int i;
6864
6865         QETH_CARD_TEXT(card, 5, "getstat");
6866
6867         stats->rx_packets = card->stats.rx_packets;
6868         stats->rx_bytes = card->stats.rx_bytes;
6869         stats->rx_errors = card->stats.rx_length_errors +
6870                            card->stats.rx_frame_errors +
6871                            card->stats.rx_fifo_errors;
6872         stats->rx_dropped = card->stats.rx_dropped_nomem +
6873                             card->stats.rx_dropped_notsupp +
6874                             card->stats.rx_dropped_runt;
6875         stats->multicast = card->stats.rx_multicast;
6876         stats->rx_length_errors = card->stats.rx_length_errors;
6877         stats->rx_frame_errors = card->stats.rx_frame_errors;
6878         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6879
6880         for (i = 0; i < card->qdio.no_out_queues; i++) {
6881                 queue = card->qdio.out_qs[i];
6882
6883                 stats->tx_packets += queue->stats.tx_packets;
6884                 stats->tx_bytes += queue->stats.tx_bytes;
6885                 stats->tx_errors += queue->stats.tx_errors;
6886                 stats->tx_dropped += queue->stats.tx_dropped;
6887         }
6888 }
6889 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6890
6891 #define TC_IQD_UCAST   0
6892 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6893                                      unsigned int ucast_txqs)
6894 {
6895         unsigned int prio;
6896
6897         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6898          * qeth_iqd_select_queue() deals with this.
6899          * For unicast traffic, we defer the queue selection to the stack.
6900          * By installing a trivial prio map that spans over only the unicast
6901          * queues, we can encourage the stack to spread the ucast traffic evenly
6902          * without selecting the mcast queue.
6903          */
6904
6905         /* One traffic class, spanning over all active ucast queues: */
6906         netdev_set_num_tc(dev, 1);
6907         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6908                             QETH_IQD_MIN_UCAST_TXQ);
6909
6910         /* Map all priorities to this traffic class: */
6911         for (prio = 0; prio <= TC_BITMASK; prio++)
6912                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6913 }
6914
6915 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6916 {
6917         struct net_device *dev = card->dev;
6918         int rc;
6919
6920         /* Per netif_setup_tc(), adjust the mapping first: */
6921         if (IS_IQD(card))
6922                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6923
6924         rc = netif_set_real_num_tx_queues(dev, count);
6925
6926         if (rc && IS_IQD(card))
6927                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6928
6929         return rc;
6930 }
6931
6932 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6933                           u8 cast_type, struct net_device *sb_dev)
6934 {
6935         u16 txq;
6936
6937         if (cast_type != RTN_UNICAST)
6938                 return QETH_IQD_MCAST_TXQ;
6939         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6940                 return QETH_IQD_MIN_UCAST_TXQ;
6941
6942         txq = netdev_pick_tx(dev, skb, sb_dev);
6943         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6944 }
6945 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6946
6947 int qeth_open(struct net_device *dev)
6948 {
6949         struct qeth_card *card = dev->ml_priv;
6950
6951         QETH_CARD_TEXT(card, 4, "qethopen");
6952
6953         card->data.state = CH_STATE_UP;
6954         netif_tx_start_all_queues(dev);
6955
6956         napi_enable(&card->napi);
6957         local_bh_disable();
6958         napi_schedule(&card->napi);
6959         if (IS_IQD(card)) {
6960                 struct qeth_qdio_out_q *queue;
6961                 unsigned int i;
6962
6963                 qeth_for_each_output_queue(card, queue, i) {
6964                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6965                                           QETH_NAPI_WEIGHT);
6966                         napi_enable(&queue->napi);
6967                         napi_schedule(&queue->napi);
6968                 }
6969         }
6970         /* kick-start the NAPI softirq: */
6971         local_bh_enable();
6972         return 0;
6973 }
6974 EXPORT_SYMBOL_GPL(qeth_open);
6975
6976 int qeth_stop(struct net_device *dev)
6977 {
6978         struct qeth_card *card = dev->ml_priv;
6979
6980         QETH_CARD_TEXT(card, 4, "qethstop");
6981         if (IS_IQD(card)) {
6982                 struct qeth_qdio_out_q *queue;
6983                 unsigned int i;
6984
6985                 /* Quiesce the NAPI instances: */
6986                 qeth_for_each_output_queue(card, queue, i)
6987                         napi_disable(&queue->napi);
6988
6989                 /* Stop .ndo_start_xmit, might still access queue->napi. */
6990                 netif_tx_disable(dev);
6991
6992                 qeth_for_each_output_queue(card, queue, i) {
6993                         del_timer_sync(&queue->timer);
6994                         /* Queues may get re-allocated, so remove the NAPIs. */
6995                         netif_napi_del(&queue->napi);
6996                 }
6997         } else {
6998                 netif_tx_disable(dev);
6999         }
7000
7001         napi_disable(&card->napi);
7002         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7003         qdio_stop_irq(CARD_DDEV(card));
7004
7005         return 0;
7006 }
7007 EXPORT_SYMBOL_GPL(qeth_stop);
7008
7009 static int __init qeth_core_init(void)
7010 {
7011         int rc;
7012
7013         pr_info("loading core functions\n");
7014
7015         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7016
7017         rc = qeth_register_dbf_views();
7018         if (rc)
7019                 goto dbf_err;
7020         qeth_core_root_dev = root_device_register("qeth");
7021         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7022         if (rc)
7023                 goto register_err;
7024         qeth_core_header_cache =
7025                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7026                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7027                                   0, NULL);
7028         if (!qeth_core_header_cache) {
7029                 rc = -ENOMEM;
7030                 goto slab_err;
7031         }
7032         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7033                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7034         if (!qeth_qdio_outbuf_cache) {
7035                 rc = -ENOMEM;
7036                 goto cqslab_err;
7037         }
7038         rc = ccw_driver_register(&qeth_ccw_driver);
7039         if (rc)
7040                 goto ccw_err;
7041         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7042         if (rc)
7043                 goto ccwgroup_err;
7044
7045         return 0;
7046
7047 ccwgroup_err:
7048         ccw_driver_unregister(&qeth_ccw_driver);
7049 ccw_err:
7050         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7051 cqslab_err:
7052         kmem_cache_destroy(qeth_core_header_cache);
7053 slab_err:
7054         root_device_unregister(qeth_core_root_dev);
7055 register_err:
7056         qeth_unregister_dbf_views();
7057 dbf_err:
7058         debugfs_remove_recursive(qeth_debugfs_root);
7059         pr_err("Initializing the qeth device driver failed\n");
7060         return rc;
7061 }
7062
7063 static void __exit qeth_core_exit(void)
7064 {
7065         qeth_clear_dbf_list();
7066         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7067         ccw_driver_unregister(&qeth_ccw_driver);
7068         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7069         kmem_cache_destroy(qeth_core_header_cache);
7070         root_device_unregister(qeth_core_root_dev);
7071         qeth_unregister_dbf_views();
7072         debugfs_remove_recursive(qeth_debugfs_root);
7073         pr_info("core functions removed\n");
7074 }
7075
7076 module_init(qeth_core_init);
7077 module_exit(qeth_core_exit);
7078 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7079 MODULE_DESCRIPTION("qeth core functions");
7080 MODULE_LICENSE("GPL");