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 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 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 981
 982 static int qeth_check_idx_response(struct qeth_card *card,
 983         unsigned char *buffer)
 984 {
 985         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 986         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 987                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 988                                  buffer[4]);
 989                 QETH_CARD_TEXT(card, 2, "ckidxres");
 990                 QETH_CARD_TEXT(card, 2, " idxterm");
 991                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 992                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 993                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 994                         dev_err(&card->gdev->dev,
 995                                 "The device does not support the configured transport mode\n");
 996                         return -EPROTONOSUPPORT;
 997                 }
 998                 return -EIO;
 999         }
1000         return 0;
1001 }
1002
1003 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
1004 {
1005         if (refcount_dec_and_test(&iob->ref_count)) {
1006                 kfree(iob->data);
1007                 kfree(iob);
1008         }
1009 }
1010 EXPORT_SYMBOL_GPL(qeth_put_cmd);
1011
1012 static void qeth_release_buffer_cb(struct qeth_card *card,
1013                                    struct qeth_cmd_buffer *iob,
1014                                    unsigned int data_length)
1015 {
1016         qeth_put_cmd(iob);
1017 }
1018
1019 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
1020 {
1021         qeth_notify_cmd(iob, rc);
1022         qeth_put_cmd(iob);
1023 }
1024
1025 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
1026                                        unsigned int length, unsigned int ccws,
1027                                        long timeout)
1028 {
1029         struct qeth_cmd_buffer *iob;
1030
1031         if (length > QETH_BUFSIZE)
1032                 return NULL;
1033
1034         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1035         if (!iob)
1036                 return NULL;
1037
1038         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1039                             GFP_KERNEL | GFP_DMA);
1040         if (!iob->data) {
1041                 kfree(iob);
1042                 return NULL;
1043         }
1044
1045         init_completion(&iob->done);
1046         spin_lock_init(&iob->lock);
1047         INIT_LIST_HEAD(&iob->list);
1048         refcount_set(&iob->ref_count, 1);
1049         iob->channel = channel;
1050         iob->timeout = timeout;
1051         iob->length = length;
1052         return iob;
1053 }
1054 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1055
1056 static void qeth_issue_next_read_cb(struct qeth_card *card,
1057                                     struct qeth_cmd_buffer *iob,
1058                                     unsigned int data_length)
1059 {
1060         struct qeth_cmd_buffer *request = NULL;
1061         struct qeth_ipa_cmd *cmd = NULL;
1062         struct qeth_reply *reply = NULL;
1063         struct qeth_cmd_buffer *tmp;
1064         unsigned long flags;
1065         int rc = 0;
1066
1067         QETH_CARD_TEXT(card, 4, "sndctlcb");
1068         rc = qeth_check_idx_response(card, iob->data);
1069         switch (rc) {
1070         case 0:
1071                 break;
1072         case -EIO:
1073                 qeth_schedule_recovery(card);
1074                 /* fall through */
1075         default:
1076                 qeth_clear_ipacmd_list(card);
1077                 goto err_idx;
1078         }
1079
1080         cmd = __ipa_reply(iob);
1081         if (cmd) {
1082                 cmd = qeth_check_ipa_data(card, cmd);
1083                 if (!cmd)
1084                         goto out;
1085                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1086                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1087                         card->osn_info.assist_cb(card->dev, cmd);
1088                         goto out;
1089                 }
1090         }
1091
1092         /* match against pending cmd requests */
1093         spin_lock_irqsave(&card->lock, flags);
1094         list_for_each_entry(tmp, &card->cmd_waiter_list, list) {
1095                 if (tmp->match && tmp->match(tmp, iob)) {
1096                         request = tmp;
1097                         /* take the object outside the lock */
1098                         qeth_get_cmd(request);
1099                         break;
1100                 }
1101         }
1102         spin_unlock_irqrestore(&card->lock, flags);
1103
1104         if (!request)
1105                 goto out;
1106
1107         reply = &request->reply;
1108         if (!reply->callback) {
1109                 rc = 0;
1110                 goto no_callback;
1111         }
1112
1113         spin_lock_irqsave(&request->lock, flags);
1114         if (request->rc)
1115                 /* Bail out when the requestor has already left: */
1116                 rc = request->rc;
1117         else
1118                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1119                                                         (unsigned long)iob);
1120         spin_unlock_irqrestore(&request->lock, flags);
1121
1122 no_callback:
1123         if (rc <= 0)
1124                 qeth_notify_cmd(request, rc);
1125         qeth_put_cmd(request);
1126 out:
1127         memcpy(&card->seqno.pdu_hdr_ack,
1128                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1129                 QETH_SEQ_NO_LENGTH);
1130         __qeth_issue_next_read(card);
1131 err_idx:
1132         qeth_put_cmd(iob);
1133 }
1134
1135 static int qeth_set_thread_start_bit(struct qeth_card *card,
1136                 unsigned long thread)
1137 {
1138         unsigned long flags;
1139         int rc = 0;
1140
1141         spin_lock_irqsave(&card->thread_mask_lock, flags);
1142         if (!(card->thread_allowed_mask & thread))
1143                 rc = -EPERM;
1144         else if (card->thread_start_mask & thread)
1145                 rc = -EBUSY;
1146         else
1147                 card->thread_start_mask |= thread;
1148         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1149
1150         return rc;
1151 }
1152
1153 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1154                                         unsigned long thread)
1155 {
1156         unsigned long flags;
1157
1158         spin_lock_irqsave(&card->thread_mask_lock, flags);
1159         card->thread_start_mask &= ~thread;
1160         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1161         wake_up(&card->wait_q);
1162 }
1163
1164 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1165                                           unsigned long thread)
1166 {
1167         unsigned long flags;
1168
1169         spin_lock_irqsave(&card->thread_mask_lock, flags);
1170         card->thread_running_mask &= ~thread;
1171         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1172         wake_up_all(&card->wait_q);
1173 }
1174
1175 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1176 {
1177         unsigned long flags;
1178         int rc = 0;
1179
1180         spin_lock_irqsave(&card->thread_mask_lock, flags);
1181         if (card->thread_start_mask & thread) {
1182                 if ((card->thread_allowed_mask & thread) &&
1183                     !(card->thread_running_mask & thread)) {
1184                         rc = 1;
1185                         card->thread_start_mask &= ~thread;
1186                         card->thread_running_mask |= thread;
1187                 } else
1188                         rc = -EPERM;
1189         }
1190         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1191         return rc;
1192 }
1193
1194 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1195 {
1196         int rc = 0;
1197
1198         wait_event(card->wait_q,
1199                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1200         return rc;
1201 }
1202
1203 int qeth_schedule_recovery(struct qeth_card *card)
1204 {
1205         int rc;
1206
1207         QETH_CARD_TEXT(card, 2, "startrec");
1208
1209         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1210         if (!rc)
1211                 schedule_work(&card->kernel_thread_starter);
1212
1213         return rc;
1214 }
1215
1216 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1217                             struct irb *irb)
1218 {
1219         int dstat, cstat;
1220         char *sense;
1221
1222         sense = (char *) irb->ecw;
1223         cstat = irb->scsw.cmd.cstat;
1224         dstat = irb->scsw.cmd.dstat;
1225
1226         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1227                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1228                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1229                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1230                 dev_warn(&cdev->dev, "The qeth device driver "
1231                         "failed to recover an error on the device\n");
1232                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1233                                  CCW_DEVID(cdev), dstat, cstat);
1234                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1235                                 16, 1, irb, 64, 1);
1236                 return -EIO;
1237         }
1238
1239         if (dstat & DEV_STAT_UNIT_CHECK) {
1240                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1241                     SENSE_RESETTING_EVENT_FLAG) {
1242                         QETH_CARD_TEXT(card, 2, "REVIND");
1243                         return -EIO;
1244                 }
1245                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1246                     SENSE_COMMAND_REJECT_FLAG) {
1247                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1248                         return -EIO;
1249                 }
1250                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1251                         QETH_CARD_TEXT(card, 2, "AFFE");
1252                         return -EIO;
1253                 }
1254                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1255                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1256                         return 0;
1257                 }
1258                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1259                         return -EIO;
1260         }
1261         return 0;
1262 }
1263
1264 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1265                                 struct irb *irb)
1266 {
1267         if (!IS_ERR(irb))
1268                 return 0;
1269
1270         switch (PTR_ERR(irb)) {
1271         case -EIO:
1272                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1273                                  CCW_DEVID(cdev));
1274                 QETH_CARD_TEXT(card, 2, "ckirberr");
1275                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1276                 return -EIO;
1277         case -ETIMEDOUT:
1278                 dev_warn(&cdev->dev, "A hardware operation timed out"
1279                         " on the device\n");
1280                 QETH_CARD_TEXT(card, 2, "ckirberr");
1281                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1282                 return -ETIMEDOUT;
1283         default:
1284                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1285                                  PTR_ERR(irb), CCW_DEVID(cdev));
1286                 QETH_CARD_TEXT(card, 2, "ckirberr");
1287                 QETH_CARD_TEXT(card, 2, "  rc???");
1288                 return PTR_ERR(irb);
1289         }
1290 }
1291
1292 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1293                 struct irb *irb)
1294 {
1295         int rc;
1296         int cstat, dstat;
1297         struct qeth_cmd_buffer *iob = NULL;
1298         struct ccwgroup_device *gdev;
1299         struct qeth_channel *channel;
1300         struct qeth_card *card;
1301
1302         /* while we hold the ccwdev lock, this stays valid: */
1303         gdev = dev_get_drvdata(&cdev->dev);
1304         card = dev_get_drvdata(&gdev->dev);
1305
1306         QETH_CARD_TEXT(card, 5, "irq");
1307
1308         if (card->read.ccwdev == cdev) {
1309                 channel = &card->read;
1310                 QETH_CARD_TEXT(card, 5, "read");
1311         } else if (card->write.ccwdev == cdev) {
1312                 channel = &card->write;
1313                 QETH_CARD_TEXT(card, 5, "write");
1314         } else {
1315                 channel = &card->data;
1316                 QETH_CARD_TEXT(card, 5, "data");
1317         }
1318
1319         if (intparm == 0) {
1320                 QETH_CARD_TEXT(card, 5, "irqunsol");
1321         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1322                 QETH_CARD_TEXT(card, 5, "irqunexp");
1323
1324                 dev_err(&cdev->dev,
1325                         "Received IRQ with intparm %lx, expected %px\n",
1326                         intparm, channel->active_cmd);
1327                 if (channel->active_cmd)
1328                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1329         } else {
1330                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1331         }
1332
1333         channel->active_cmd = NULL;
1334         qeth_unlock_channel(card, channel);
1335
1336         rc = qeth_check_irb_error(card, cdev, irb);
1337         if (rc) {
1338                 /* IO was terminated, free its resources. */
1339                 if (iob)
1340                         qeth_cancel_cmd(iob, rc);
1341                 return;
1342         }
1343
1344         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1345                 channel->state = CH_STATE_STOPPED;
1346                 wake_up(&card->wait_q);
1347         }
1348
1349         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1350                 channel->state = CH_STATE_HALTED;
1351                 wake_up(&card->wait_q);
1352         }
1353
1354         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1355                                           SCSW_FCTL_HALT_FUNC))) {
1356                 qeth_cancel_cmd(iob, -ECANCELED);
1357                 iob = NULL;
1358         }
1359
1360         cstat = irb->scsw.cmd.cstat;
1361         dstat = irb->scsw.cmd.dstat;
1362
1363         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1364             (dstat & DEV_STAT_UNIT_CHECK) ||
1365             (cstat)) {
1366                 if (irb->esw.esw0.erw.cons) {
1367                         dev_warn(&channel->ccwdev->dev,
1368                                 "The qeth device driver failed to recover "
1369                                 "an error on the device\n");
1370                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1371                                          CCW_DEVID(channel->ccwdev), cstat,
1372                                          dstat);
1373                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1374                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1375                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1376                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1377                 }
1378
1379                 rc = qeth_get_problem(card, cdev, irb);
1380                 if (rc) {
1381                         card->read_or_write_problem = 1;
1382                         if (iob)
1383                                 qeth_cancel_cmd(iob, rc);
1384                         qeth_clear_ipacmd_list(card);
1385                         qeth_schedule_recovery(card);
1386                         return;
1387                 }
1388         }
1389
1390         if (iob) {
1391                 /* sanity check: */
1392                 if (irb->scsw.cmd.count > iob->length) {
1393                         qeth_cancel_cmd(iob, -EIO);
1394                         return;
1395                 }
1396                 if (iob->callback)
1397                         iob->callback(card, iob,
1398                                       iob->length - irb->scsw.cmd.count);
1399         }
1400 }
1401
1402 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1403                 struct qeth_qdio_out_buffer *buf,
1404                 enum iucv_tx_notify notification)
1405 {
1406         struct sk_buff *skb;
1407
1408         skb_queue_walk(&buf->skb_list, skb) {
1409                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1410                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1411                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1412                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1413         }
1414 }
1415
1416 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1417                                  int budget)
1418 {
1419         struct qeth_qdio_out_q *queue = buf->q;
1420         struct sk_buff *skb;
1421
1422         /* release may never happen from within CQ tasklet scope */
1423         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1424
1425         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1426                 qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
1427
1428         /* Empty buffer? */
1429         if (buf->next_element_to_fill == 0)
1430                 return;
1431
1432         QETH_TXQ_STAT_INC(queue, bufs);
1433         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1434         if (error) {
1435                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1436         } else {
1437                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1438                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1439         }
1440
1441         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1442                 unsigned int bytes = qdisc_pkt_len(skb);
1443                 bool is_tso = skb_is_gso(skb);
1444                 unsigned int packets;
1445
1446                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1447                 if (!error) {
1448                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1449                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1450                         if (skb_is_nonlinear(skb))
1451                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1452                         if (is_tso) {
1453                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1454                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1455                         }
1456                 }
1457
1458                 napi_consume_skb(skb, budget);
1459         }
1460 }
1461
1462 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1463                                      struct qeth_qdio_out_buffer *buf,
1464                                      bool error, int budget)
1465 {
1466         int i;
1467
1468         /* is PCI flag set on buffer? */
1469         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1470                 atomic_dec(&queue->set_pci_flags_count);
1471
1472         qeth_tx_complete_buf(buf, error, budget);
1473
1474         for (i = 0; i < queue->max_elements; ++i) {
1475                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1476
1477                 if (data && buf->is_header[i])
1478                         kmem_cache_free(qeth_core_header_cache, data);
1479                 buf->is_header[i] = 0;
1480         }
1481
1482         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1483         buf->next_element_to_fill = 0;
1484         buf->frames = 0;
1485         buf->bytes = 0;
1486         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1487 }
1488
1489 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1490 {
1491         int j;
1492
1493         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1494                 if (!q->bufs[j])
1495                         continue;
1496                 qeth_cleanup_handled_pending(q, j, 1);
1497                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1498                 if (free) {
1499                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1500                         q->bufs[j] = NULL;
1501                 }
1502         }
1503 }
1504
1505 void qeth_drain_output_queues(struct qeth_card *card)
1506 {
1507         int i;
1508
1509         QETH_CARD_TEXT(card, 2, "clearqdbf");
1510         /* clear outbound buffers to free skbs */
1511         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1512                 if (card->qdio.out_qs[i])
1513                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1514         }
1515 }
1516 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1517
1518 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1519 {
1520         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1521         unsigned int count;
1522         int rc;
1523
1524         count = IS_VM_NIC(card) ? min(max, card->dev->real_num_tx_queues) : max;
1525
1526         rtnl_lock();
1527         rc = netif_set_real_num_tx_queues(card->dev, count);
1528         rtnl_unlock();
1529
1530         if (rc)
1531                 return rc;
1532
1533         if (card->qdio.no_out_queues == max)
1534                 return 0;
1535
1536         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1537                 qeth_free_qdio_queues(card);
1538
1539         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1540                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1541
1542         card->qdio.no_out_queues = max;
1543         return 0;
1544 }
1545
1546 static int qeth_update_from_chp_desc(struct qeth_card *card)
1547 {
1548         struct ccw_device *ccwdev;
1549         struct channel_path_desc_fmt0 *chp_dsc;
1550         int rc = 0;
1551
1552         QETH_CARD_TEXT(card, 2, "chp_desc");
1553
1554         ccwdev = card->data.ccwdev;
1555         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1556         if (!chp_dsc)
1557                 return -ENOMEM;
1558
1559         card->info.func_level = 0x4100 + chp_dsc->desc;
1560
1561         if (IS_OSD(card) || IS_OSX(card))
1562                 /* CHPP field bit 6 == 1 -> single queue */
1563                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1564
1565         kfree(chp_dsc);
1566         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1567         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1568         return rc;
1569 }
1570
1571 static void qeth_init_qdio_info(struct qeth_card *card)
1572 {
1573         QETH_CARD_TEXT(card, 4, "intqdinf");
1574         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1575         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1576         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1577
1578         /* inbound */
1579         card->qdio.no_in_queues = 1;
1580         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1581         if (IS_IQD(card))
1582                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1583         else
1584                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1585         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1586         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1587         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1588 }
1589
1590 static void qeth_set_initial_options(struct qeth_card *card)
1591 {
1592         card->options.route4.type = NO_ROUTER;
1593         card->options.route6.type = NO_ROUTER;
1594         card->options.isolation = ISOLATION_MODE_NONE;
1595         card->options.cq = QETH_CQ_DISABLED;
1596         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1597 }
1598
1599 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1600 {
1601         unsigned long flags;
1602         int rc = 0;
1603
1604         spin_lock_irqsave(&card->thread_mask_lock, flags);
1605         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1606                         (u8) card->thread_start_mask,
1607                         (u8) card->thread_allowed_mask,
1608                         (u8) card->thread_running_mask);
1609         rc = (card->thread_start_mask & thread);
1610         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1611         return rc;
1612 }
1613
1614 static int qeth_do_reset(void *data);
1615 static void qeth_start_kernel_thread(struct work_struct *work)
1616 {
1617         struct task_struct *ts;
1618         struct qeth_card *card = container_of(work, struct qeth_card,
1619                                         kernel_thread_starter);
1620         QETH_CARD_TEXT(card , 2, "strthrd");
1621
1622         if (card->read.state != CH_STATE_UP &&
1623             card->write.state != CH_STATE_UP)
1624                 return;
1625         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1626                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1627                 if (IS_ERR(ts)) {
1628                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1629                         qeth_clear_thread_running_bit(card,
1630                                 QETH_RECOVER_THREAD);
1631                 }
1632         }
1633 }
1634
1635 static void qeth_buffer_reclaim_work(struct work_struct *);
1636 static void qeth_setup_card(struct qeth_card *card)
1637 {
1638         QETH_CARD_TEXT(card, 2, "setupcrd");
1639
1640         card->info.type = CARD_RDEV(card)->id.driver_info;
1641         card->state = CARD_STATE_DOWN;
1642         spin_lock_init(&card->lock);
1643         spin_lock_init(&card->thread_mask_lock);
1644         mutex_init(&card->conf_mutex);
1645         mutex_init(&card->discipline_mutex);
1646         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1647         INIT_LIST_HEAD(&card->cmd_waiter_list);
1648         init_waitqueue_head(&card->wait_q);
1649         qeth_set_initial_options(card);
1650         /* IP address takeover */
1651         INIT_LIST_HEAD(&card->ipato.entries);
1652         qeth_init_qdio_info(card);
1653         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1654         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1655         hash_init(card->rx_mode_addrs);
1656         hash_init(card->local_addrs4);
1657         hash_init(card->local_addrs6);
1658         spin_lock_init(&card->local_addrs4_lock);
1659         spin_lock_init(&card->local_addrs6_lock);
1660 }
1661
1662 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1663 {
1664         struct qeth_card *card = container_of(slr, struct qeth_card,
1665                                         qeth_service_level);
1666         if (card->info.mcl_level[0])
1667                 seq_printf(m, "qeth: %s firmware level %s\n",
1668                         CARD_BUS_ID(card), card->info.mcl_level);
1669 }
1670
1671 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1672 {
1673         struct qeth_card *card;
1674
1675         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1676         card = kzalloc(sizeof(*card), GFP_KERNEL);
1677         if (!card)
1678                 goto out;
1679         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1680
1681         card->gdev = gdev;
1682         dev_set_drvdata(&gdev->dev, card);
1683         CARD_RDEV(card) = gdev->cdev[0];
1684         CARD_WDEV(card) = gdev->cdev[1];
1685         CARD_DDEV(card) = gdev->cdev[2];
1686
1687         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1688                                                  dev_name(&gdev->dev));
1689         if (!card->event_wq)
1690                 goto out_wq;
1691
1692         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1693         if (!card->read_cmd)
1694                 goto out_read_cmd;
1695
1696         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1697                                            qeth_debugfs_root);
1698         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1699                             &qeth_debugfs_local_addr_fops);
1700
1701         card->qeth_service_level.seq_print = qeth_core_sl_print;
1702         register_service_level(&card->qeth_service_level);
1703         return card;
1704
1705 out_read_cmd:
1706         destroy_workqueue(card->event_wq);
1707 out_wq:
1708         dev_set_drvdata(&gdev->dev, NULL);
1709         kfree(card);
1710 out:
1711         return NULL;
1712 }
1713
1714 static int qeth_clear_channel(struct qeth_card *card,
1715                               struct qeth_channel *channel)
1716 {
1717         int rc;
1718
1719         QETH_CARD_TEXT(card, 3, "clearch");
1720         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1721         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1722         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1723
1724         if (rc)
1725                 return rc;
1726         rc = wait_event_interruptible_timeout(card->wait_q,
1727                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1728         if (rc == -ERESTARTSYS)
1729                 return rc;
1730         if (channel->state != CH_STATE_STOPPED)
1731                 return -ETIME;
1732         channel->state = CH_STATE_DOWN;
1733         return 0;
1734 }
1735
1736 static int qeth_halt_channel(struct qeth_card *card,
1737                              struct qeth_channel *channel)
1738 {
1739         int rc;
1740
1741         QETH_CARD_TEXT(card, 3, "haltch");
1742         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1743         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1744         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1745
1746         if (rc)
1747                 return rc;
1748         rc = wait_event_interruptible_timeout(card->wait_q,
1749                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1750         if (rc == -ERESTARTSYS)
1751                 return rc;
1752         if (channel->state != CH_STATE_HALTED)
1753                 return -ETIME;
1754         return 0;
1755 }
1756
1757 int qeth_stop_channel(struct qeth_channel *channel)
1758 {
1759         struct ccw_device *cdev = channel->ccwdev;
1760         int rc;
1761
1762         rc = ccw_device_set_offline(cdev);
1763
1764         spin_lock_irq(get_ccwdev_lock(cdev));
1765         if (channel->active_cmd) {
1766                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1767                         channel->active_cmd);
1768                 channel->active_cmd = NULL;
1769         }
1770         cdev->handler = NULL;
1771         spin_unlock_irq(get_ccwdev_lock(cdev));
1772
1773         return rc;
1774 }
1775 EXPORT_SYMBOL_GPL(qeth_stop_channel);
1776
1777 static int qeth_start_channel(struct qeth_channel *channel)
1778 {
1779         struct ccw_device *cdev = channel->ccwdev;
1780         int rc;
1781
1782         channel->state = CH_STATE_DOWN;
1783         atomic_set(&channel->irq_pending, 0);
1784
1785         spin_lock_irq(get_ccwdev_lock(cdev));
1786         cdev->handler = qeth_irq;
1787         spin_unlock_irq(get_ccwdev_lock(cdev));
1788
1789         rc = ccw_device_set_online(cdev);
1790         if (rc)
1791                 goto err;
1792
1793         return 0;
1794
1795 err:
1796         spin_lock_irq(get_ccwdev_lock(cdev));
1797         cdev->handler = NULL;
1798         spin_unlock_irq(get_ccwdev_lock(cdev));
1799         return rc;
1800 }
1801
1802 static int qeth_halt_channels(struct qeth_card *card)
1803 {
1804         int rc1 = 0, rc2 = 0, rc3 = 0;
1805
1806         QETH_CARD_TEXT(card, 3, "haltchs");
1807         rc1 = qeth_halt_channel(card, &card->read);
1808         rc2 = qeth_halt_channel(card, &card->write);
1809         rc3 = qeth_halt_channel(card, &card->data);
1810         if (rc1)
1811                 return rc1;
1812         if (rc2)
1813                 return rc2;
1814         return rc3;
1815 }
1816
1817 static int qeth_clear_channels(struct qeth_card *card)
1818 {
1819         int rc1 = 0, rc2 = 0, rc3 = 0;
1820
1821         QETH_CARD_TEXT(card, 3, "clearchs");
1822         rc1 = qeth_clear_channel(card, &card->read);
1823         rc2 = qeth_clear_channel(card, &card->write);
1824         rc3 = qeth_clear_channel(card, &card->data);
1825         if (rc1)
1826                 return rc1;
1827         if (rc2)
1828                 return rc2;
1829         return rc3;
1830 }
1831
1832 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1833 {
1834         int rc = 0;
1835
1836         QETH_CARD_TEXT(card, 3, "clhacrd");
1837
1838         if (halt)
1839                 rc = qeth_halt_channels(card);
1840         if (rc)
1841                 return rc;
1842         return qeth_clear_channels(card);
1843 }
1844
1845 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1846 {
1847         int rc = 0;
1848
1849         QETH_CARD_TEXT(card, 3, "qdioclr");
1850         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1851                 QETH_QDIO_CLEANING)) {
1852         case QETH_QDIO_ESTABLISHED:
1853                 if (IS_IQD(card))
1854                         rc = qdio_shutdown(CARD_DDEV(card),
1855                                 QDIO_FLAG_CLEANUP_USING_HALT);
1856                 else
1857                         rc = qdio_shutdown(CARD_DDEV(card),
1858                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1859                 if (rc)
1860                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1861                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1862                 break;
1863         case QETH_QDIO_CLEANING:
1864                 return rc;
1865         default:
1866                 break;
1867         }
1868         rc = qeth_clear_halt_card(card, use_halt);
1869         if (rc)
1870                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1871         return rc;
1872 }
1873 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1874
1875 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1876 {
1877         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1878         struct diag26c_vnic_resp *response = NULL;
1879         struct diag26c_vnic_req *request = NULL;
1880         struct ccw_dev_id id;
1881         char userid[80];
1882         int rc = 0;
1883
1884         QETH_CARD_TEXT(card, 2, "vmlayer");
1885
1886         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1887         if (rc)
1888                 goto out;
1889
1890         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1891         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1892         if (!request || !response) {
1893                 rc = -ENOMEM;
1894                 goto out;
1895         }
1896
1897         ccw_device_get_id(CARD_RDEV(card), &id);
1898         request->resp_buf_len = sizeof(*response);
1899         request->resp_version = DIAG26C_VERSION6_VM65918;
1900         request->req_format = DIAG26C_VNIC_INFO;
1901         ASCEBC(userid, 8);
1902         memcpy(&request->sys_name, userid, 8);
1903         request->devno = id.devno;
1904
1905         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1906         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1907         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1908         if (rc)
1909                 goto out;
1910         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1911
1912         if (request->resp_buf_len < sizeof(*response) ||
1913             response->version != request->resp_version) {
1914                 rc = -EIO;
1915                 goto out;
1916         }
1917
1918         if (response->protocol == VNIC_INFO_PROT_L2)
1919                 disc = QETH_DISCIPLINE_LAYER2;
1920         else if (response->protocol == VNIC_INFO_PROT_L3)
1921                 disc = QETH_DISCIPLINE_LAYER3;
1922
1923 out:
1924         kfree(response);
1925         kfree(request);
1926         if (rc)
1927                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1928         return disc;
1929 }
1930
1931 /* Determine whether the device requires a specific layer discipline */
1932 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1933 {
1934         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1935
1936         if (IS_OSM(card) || IS_OSN(card))
1937                 disc = QETH_DISCIPLINE_LAYER2;
1938         else if (IS_VM_NIC(card))
1939                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1940                                       qeth_vm_detect_layer(card);
1941
1942         switch (disc) {
1943         case QETH_DISCIPLINE_LAYER2:
1944                 QETH_CARD_TEXT(card, 3, "force l2");
1945                 break;
1946         case QETH_DISCIPLINE_LAYER3:
1947                 QETH_CARD_TEXT(card, 3, "force l3");
1948                 break;
1949         default:
1950                 QETH_CARD_TEXT(card, 3, "force no");
1951         }
1952
1953         return disc;
1954 }
1955
1956 static void qeth_set_blkt_defaults(struct qeth_card *card)
1957 {
1958         QETH_CARD_TEXT(card, 2, "cfgblkt");
1959
1960         if (card->info.use_v1_blkt) {
1961                 card->info.blkt.time_total = 0;
1962                 card->info.blkt.inter_packet = 0;
1963                 card->info.blkt.inter_packet_jumbo = 0;
1964         } else {
1965                 card->info.blkt.time_total = 250;
1966                 card->info.blkt.inter_packet = 5;
1967                 card->info.blkt.inter_packet_jumbo = 15;
1968         }
1969 }
1970
1971 static void qeth_idx_init(struct qeth_card *card)
1972 {
1973         memset(&card->seqno, 0, sizeof(card->seqno));
1974
1975         card->token.issuer_rm_w = 0x00010103UL;
1976         card->token.cm_filter_w = 0x00010108UL;
1977         card->token.cm_connection_w = 0x0001010aUL;
1978         card->token.ulp_filter_w = 0x0001010bUL;
1979         card->token.ulp_connection_w = 0x0001010dUL;
1980
1981         switch (card->info.type) {
1982         case QETH_CARD_TYPE_IQD:
1983                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1984                 break;
1985         case QETH_CARD_TYPE_OSD:
1986         case QETH_CARD_TYPE_OSN:
1987                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1988                 break;
1989         default:
1990                 break;
1991         }
1992 }
1993
1994 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1995                                   struct qeth_cmd_buffer *iob)
1996 {
1997         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1998                QETH_SEQ_NO_LENGTH);
1999         if (iob->channel == &card->write)
2000                 card->seqno.trans_hdr++;
2001 }
2002
2003 static int qeth_peer_func_level(int level)
2004 {
2005         if ((level & 0xff) == 8)
2006                 return (level & 0xff) + 0x400;
2007         if (((level >> 8) & 3) == 1)
2008                 return (level & 0xff) + 0x200;
2009         return level;
2010 }
2011
2012 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
2013                                   struct qeth_cmd_buffer *iob)
2014 {
2015         qeth_idx_finalize_cmd(card, iob);
2016
2017         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2018                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2019         card->seqno.pdu_hdr++;
2020         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2021                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2022
2023         iob->callback = qeth_release_buffer_cb;
2024 }
2025
2026 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2027                                  struct qeth_cmd_buffer *reply)
2028 {
2029         /* MPC cmds are issued strictly in sequence. */
2030         return !IS_IPA(reply->data);
2031 }
2032
2033 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2034                                                   const void *data,
2035                                                   unsigned int data_length)
2036 {
2037         struct qeth_cmd_buffer *iob;
2038
2039         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2040         if (!iob)
2041                 return NULL;
2042
2043         memcpy(iob->data, data, data_length);
2044         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2045                        iob->data);
2046         iob->finalize = qeth_mpc_finalize_cmd;
2047         iob->match = qeth_mpc_match_reply;
2048         return iob;
2049 }
2050
2051 /**
2052  * qeth_send_control_data() -   send control command to the card
2053  * @card:                       qeth_card structure pointer
2054  * @iob:                        qeth_cmd_buffer pointer
2055  * @reply_cb:                   callback function pointer
2056  * @cb_card:                    pointer to the qeth_card structure
2057  * @cb_reply:                   pointer to the qeth_reply structure
2058  * @cb_cmd:                     pointer to the original iob for non-IPA
2059  *                              commands, or to the qeth_ipa_cmd structure
2060  *                              for the IPA commands.
2061  * @reply_param:                private pointer passed to the callback
2062  *
2063  * Callback function gets called one or more times, with cb_cmd
2064  * pointing to the response returned by the hardware. Callback
2065  * function must return
2066  *   > 0 if more reply blocks are expected,
2067  *     0 if the last or only reply block is received, and
2068  *   < 0 on error.
2069  * Callback function can get the value of the reply_param pointer from the
2070  * field 'param' of the structure qeth_reply.
2071  */
2072
2073 static int qeth_send_control_data(struct qeth_card *card,
2074                                   struct qeth_cmd_buffer *iob,
2075                                   int (*reply_cb)(struct qeth_card *cb_card,
2076                                                   struct qeth_reply *cb_reply,
2077                                                   unsigned long cb_cmd),
2078                                   void *reply_param)
2079 {
2080         struct qeth_channel *channel = iob->channel;
2081         struct qeth_reply *reply = &iob->reply;
2082         long timeout = iob->timeout;
2083         int rc;
2084
2085         QETH_CARD_TEXT(card, 2, "sendctl");
2086
2087         reply->callback = reply_cb;
2088         reply->param = reply_param;
2089
2090         timeout = wait_event_interruptible_timeout(card->wait_q,
2091                                                    qeth_trylock_channel(channel),
2092                                                    timeout);
2093         if (timeout <= 0) {
2094                 qeth_put_cmd(iob);
2095                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2096         }
2097
2098         if (iob->finalize)
2099                 iob->finalize(card, iob);
2100         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2101
2102         qeth_enqueue_cmd(card, iob);
2103
2104         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2105         qeth_get_cmd(iob);
2106
2107         QETH_CARD_TEXT(card, 6, "noirqpnd");
2108         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2109         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2110                                       (addr_t) iob, 0, 0, timeout);
2111         if (!rc)
2112                 channel->active_cmd = iob;
2113         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2114         if (rc) {
2115                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2116                                  CARD_DEVID(card), rc);
2117                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2118                 qeth_dequeue_cmd(card, iob);
2119                 qeth_put_cmd(iob);
2120                 qeth_unlock_channel(card, channel);
2121                 goto out;
2122         }
2123
2124         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2125                                                             timeout);
2126         if (timeout <= 0)
2127                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2128
2129         qeth_dequeue_cmd(card, iob);
2130
2131         if (reply_cb) {
2132                 /* Wait until the callback for a late reply has completed: */
2133                 spin_lock_irq(&iob->lock);
2134                 if (rc)
2135                         /* Zap any callback that's still pending: */
2136                         iob->rc = rc;
2137                 spin_unlock_irq(&iob->lock);
2138         }
2139
2140         if (!rc)
2141                 rc = iob->rc;
2142
2143 out:
2144         qeth_put_cmd(iob);
2145         return rc;
2146 }
2147
2148 struct qeth_node_desc {
2149         struct node_descriptor nd1;
2150         struct node_descriptor nd2;
2151         struct node_descriptor nd3;
2152 };
2153
2154 static void qeth_read_conf_data_cb(struct qeth_card *card,
2155                                    struct qeth_cmd_buffer *iob,
2156                                    unsigned int data_length)
2157 {
2158         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2159         int rc = 0;
2160         u8 *tag;
2161
2162         QETH_CARD_TEXT(card, 2, "cfgunit");
2163
2164         if (data_length < sizeof(*nd)) {
2165                 rc = -EINVAL;
2166                 goto out;
2167         }
2168
2169         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2170                                nd->nd1.plant[1] == _ascebc['M'];
2171         tag = (u8 *)&nd->nd1.tag;
2172         card->info.chpid = tag[0];
2173         card->info.unit_addr2 = tag[1];
2174
2175         tag = (u8 *)&nd->nd2.tag;
2176         card->info.cula = tag[1];
2177
2178         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2179                                  nd->nd3.model[1] == 0xF0 &&
2180                                  nd->nd3.model[2] >= 0xF1 &&
2181                                  nd->nd3.model[2] <= 0xF4;
2182
2183 out:
2184         qeth_notify_cmd(iob, rc);
2185         qeth_put_cmd(iob);
2186 }
2187
2188 static int qeth_read_conf_data(struct qeth_card *card)
2189 {
2190         struct qeth_channel *channel = &card->data;
2191         struct qeth_cmd_buffer *iob;
2192         struct ciw *ciw;
2193
2194         /* scan for RCD command in extended SenseID data */
2195         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2196         if (!ciw || ciw->cmd == 0)
2197                 return -EOPNOTSUPP;
2198         if (ciw->count < sizeof(struct qeth_node_desc))
2199                 return -EINVAL;
2200
2201         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2202         if (!iob)
2203                 return -ENOMEM;
2204
2205         iob->callback = qeth_read_conf_data_cb;
2206         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2207                        iob->data);
2208
2209         return qeth_send_control_data(card, iob, NULL, NULL);
2210 }
2211
2212 static int qeth_idx_check_activate_response(struct qeth_card *card,
2213                                             struct qeth_channel *channel,
2214                                             struct qeth_cmd_buffer *iob)
2215 {
2216         int rc;
2217
2218         rc = qeth_check_idx_response(card, iob->data);
2219         if (rc)
2220                 return rc;
2221
2222         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2223                 return 0;
2224
2225         /* negative reply: */
2226         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2227                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2228
2229         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2230         case QETH_IDX_ACT_ERR_EXCL:
2231                 dev_err(&channel->ccwdev->dev,
2232                         "The adapter is used exclusively by another host\n");
2233                 return -EBUSY;
2234         case QETH_IDX_ACT_ERR_AUTH:
2235         case QETH_IDX_ACT_ERR_AUTH_USER:
2236                 dev_err(&channel->ccwdev->dev,
2237                         "Setting the device online failed because of insufficient authorization\n");
2238                 return -EPERM;
2239         default:
2240                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2241                                  CCW_DEVID(channel->ccwdev));
2242                 return -EIO;
2243         }
2244 }
2245
2246 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2247                                               struct qeth_cmd_buffer *iob,
2248                                               unsigned int data_length)
2249 {
2250         struct qeth_channel *channel = iob->channel;
2251         u16 peer_level;
2252         int rc;
2253
2254         QETH_CARD_TEXT(card, 2, "idxrdcb");
2255
2256         rc = qeth_idx_check_activate_response(card, channel, iob);
2257         if (rc)
2258                 goto out;
2259
2260         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2261         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2262                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2263                                  CCW_DEVID(channel->ccwdev),
2264                                  card->info.func_level, peer_level);
2265                 rc = -EINVAL;
2266                 goto out;
2267         }
2268
2269         memcpy(&card->token.issuer_rm_r,
2270                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2271                QETH_MPC_TOKEN_LENGTH);
2272         memcpy(&card->info.mcl_level[0],
2273                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2274
2275 out:
2276         qeth_notify_cmd(iob, rc);
2277         qeth_put_cmd(iob);
2278 }
2279
2280 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2281                                                struct qeth_cmd_buffer *iob,
2282                                                unsigned int data_length)
2283 {
2284         struct qeth_channel *channel = iob->channel;
2285         u16 peer_level;
2286         int rc;
2287
2288         QETH_CARD_TEXT(card, 2, "idxwrcb");
2289
2290         rc = qeth_idx_check_activate_response(card, channel, iob);
2291         if (rc)
2292                 goto out;
2293
2294         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2295         if ((peer_level & ~0x0100) !=
2296             qeth_peer_func_level(card->info.func_level)) {
2297                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2298                                  CCW_DEVID(channel->ccwdev),
2299                                  card->info.func_level, peer_level);
2300                 rc = -EINVAL;
2301         }
2302
2303 out:
2304         qeth_notify_cmd(iob, rc);
2305         qeth_put_cmd(iob);
2306 }
2307
2308 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2309                                         struct qeth_cmd_buffer *iob)
2310 {
2311         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2312         u8 port = ((u8)card->dev->dev_port) | 0x80;
2313         struct ccw1 *ccw = __ccw_from_cmd(iob);
2314         struct ccw_dev_id dev_id;
2315
2316         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2317                        iob->data);
2318         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2319         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2320         iob->finalize = qeth_idx_finalize_cmd;
2321
2322         port |= QETH_IDX_ACT_INVAL_FRAME;
2323         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2324         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2325                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2326         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2327                &card->info.func_level, 2);
2328         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
2329         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2330 }
2331
2332 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2333 {
2334         struct qeth_channel *channel = &card->read;
2335         struct qeth_cmd_buffer *iob;
2336         int rc;
2337
2338         QETH_CARD_TEXT(card, 2, "idxread");
2339
2340         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2341         if (!iob)
2342                 return -ENOMEM;
2343
2344         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2345         qeth_idx_setup_activate_cmd(card, iob);
2346         iob->callback = qeth_idx_activate_read_channel_cb;
2347
2348         rc = qeth_send_control_data(card, iob, NULL, NULL);
2349         if (rc)
2350                 return rc;
2351
2352         channel->state = CH_STATE_UP;
2353         return 0;
2354 }
2355
2356 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2357 {
2358         struct qeth_channel *channel = &card->write;
2359         struct qeth_cmd_buffer *iob;
2360         int rc;
2361
2362         QETH_CARD_TEXT(card, 2, "idxwrite");
2363
2364         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2365         if (!iob)
2366                 return -ENOMEM;
2367
2368         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2369         qeth_idx_setup_activate_cmd(card, iob);
2370         iob->callback = qeth_idx_activate_write_channel_cb;
2371
2372         rc = qeth_send_control_data(card, iob, NULL, NULL);
2373         if (rc)
2374                 return rc;
2375
2376         channel->state = CH_STATE_UP;
2377         return 0;
2378 }
2379
2380 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2381                 unsigned long data)
2382 {
2383         struct qeth_cmd_buffer *iob;
2384
2385         QETH_CARD_TEXT(card, 2, "cmenblcb");
2386
2387         iob = (struct qeth_cmd_buffer *) data;
2388         memcpy(&card->token.cm_filter_r,
2389                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2390                QETH_MPC_TOKEN_LENGTH);
2391         return 0;
2392 }
2393
2394 static int qeth_cm_enable(struct qeth_card *card)
2395 {
2396         struct qeth_cmd_buffer *iob;
2397
2398         QETH_CARD_TEXT(card, 2, "cmenable");
2399
2400         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2401         if (!iob)
2402                 return -ENOMEM;
2403
2404         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2405                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2406         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2407                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2408
2409         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2410 }
2411
2412 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2413                 unsigned long data)
2414 {
2415         struct qeth_cmd_buffer *iob;
2416
2417         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2418
2419         iob = (struct qeth_cmd_buffer *) data;
2420         memcpy(&card->token.cm_connection_r,
2421                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2422                QETH_MPC_TOKEN_LENGTH);
2423         return 0;
2424 }
2425
2426 static int qeth_cm_setup(struct qeth_card *card)
2427 {
2428         struct qeth_cmd_buffer *iob;
2429
2430         QETH_CARD_TEXT(card, 2, "cmsetup");
2431
2432         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2433         if (!iob)
2434                 return -ENOMEM;
2435
2436         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2437                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2438         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2439                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2440         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2441                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2442         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2443 }
2444
2445 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2446 {
2447         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2448             link_type == QETH_LINK_TYPE_HSTR) {
2449                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2450                 return false;
2451         }
2452
2453         return true;
2454 }
2455
2456 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2457 {
2458         struct net_device *dev = card->dev;
2459         unsigned int new_mtu;
2460
2461         if (!max_mtu) {
2462                 /* IQD needs accurate max MTU to set up its RX buffers: */
2463                 if (IS_IQD(card))
2464                         return -EINVAL;
2465                 /* tolerate quirky HW: */
2466                 max_mtu = ETH_MAX_MTU;
2467         }
2468
2469         rtnl_lock();
2470         if (IS_IQD(card)) {
2471                 /* move any device with default MTU to new max MTU: */
2472                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2473
2474                 /* adjust RX buffer size to new max MTU: */
2475                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2476                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2477                         qeth_free_qdio_queues(card);
2478         } else {
2479                 if (dev->mtu)
2480                         new_mtu = dev->mtu;
2481                 /* default MTUs for first setup: */
2482                 else if (IS_LAYER2(card))
2483                         new_mtu = ETH_DATA_LEN;
2484                 else
2485                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2486         }
2487
2488         dev->max_mtu = max_mtu;
2489         dev->mtu = min(new_mtu, max_mtu);
2490         rtnl_unlock();
2491         return 0;
2492 }
2493
2494 static int qeth_get_mtu_outof_framesize(int framesize)
2495 {
2496         switch (framesize) {
2497         case 0x4000:
2498                 return 8192;
2499         case 0x6000:
2500                 return 16384;
2501         case 0xa000:
2502                 return 32768;
2503         case 0xffff:
2504                 return 57344;
2505         default:
2506                 return 0;
2507         }
2508 }
2509
2510 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2511                 unsigned long data)
2512 {
2513         __u16 mtu, framesize;
2514         __u16 len;
2515         struct qeth_cmd_buffer *iob;
2516         u8 link_type = 0;
2517
2518         QETH_CARD_TEXT(card, 2, "ulpenacb");
2519
2520         iob = (struct qeth_cmd_buffer *) data;
2521         memcpy(&card->token.ulp_filter_r,
2522                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2523                QETH_MPC_TOKEN_LENGTH);
2524         if (IS_IQD(card)) {
2525                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2526                 mtu = qeth_get_mtu_outof_framesize(framesize);
2527         } else {
2528                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2529         }
2530         *(u16 *)reply->param = mtu;
2531
2532         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2533         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2534                 memcpy(&link_type,
2535                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2536                 if (!qeth_is_supported_link_type(card, link_type))
2537                         return -EPROTONOSUPPORT;
2538         }
2539
2540         card->info.link_type = link_type;
2541         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2542         return 0;
2543 }
2544
2545 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2546 {
2547         if (IS_OSN(card))
2548                 return QETH_PROT_OSN2;
2549         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2550 }
2551
2552 static int qeth_ulp_enable(struct qeth_card *card)
2553 {
2554         u8 prot_type = qeth_mpc_select_prot_type(card);
2555         struct qeth_cmd_buffer *iob;
2556         u16 max_mtu;
2557         int rc;
2558
2559         QETH_CARD_TEXT(card, 2, "ulpenabl");
2560
2561         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2562         if (!iob)
2563                 return -ENOMEM;
2564
2565         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2566         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2567         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2568                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2569         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2570                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2571         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2572         if (rc)
2573                 return rc;
2574         return qeth_update_max_mtu(card, max_mtu);
2575 }
2576
2577 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2578                 unsigned long data)
2579 {
2580         struct qeth_cmd_buffer *iob;
2581
2582         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2583
2584         iob = (struct qeth_cmd_buffer *) data;
2585         memcpy(&card->token.ulp_connection_r,
2586                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2587                QETH_MPC_TOKEN_LENGTH);
2588         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2589                      3)) {
2590                 QETH_CARD_TEXT(card, 2, "olmlimit");
2591                 dev_err(&card->gdev->dev, "A connection could not be "
2592                         "established because of an OLM limit\n");
2593                 return -EMLINK;
2594         }
2595         return 0;
2596 }
2597
2598 static int qeth_ulp_setup(struct qeth_card *card)
2599 {
2600         __u16 temp;
2601         struct qeth_cmd_buffer *iob;
2602         struct ccw_dev_id dev_id;
2603
2604         QETH_CARD_TEXT(card, 2, "ulpsetup");
2605
2606         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2607         if (!iob)
2608                 return -ENOMEM;
2609
2610         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2611                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2612         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2613                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2614         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2615                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2616
2617         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2618         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2619         temp = (card->info.cula << 8) + card->info.unit_addr2;
2620         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2621         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2622 }
2623
2624 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2625 {
2626         struct qeth_qdio_out_buffer *newbuf;
2627
2628         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2629         if (!newbuf)
2630                 return -ENOMEM;
2631
2632         newbuf->buffer = q->qdio_bufs[bidx];
2633         skb_queue_head_init(&newbuf->skb_list);
2634         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2635         newbuf->q = q;
2636         newbuf->next_pending = q->bufs[bidx];
2637         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2638         q->bufs[bidx] = newbuf;
2639         return 0;
2640 }
2641
2642 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2643 {
2644         if (!q)
2645                 return;
2646
2647         qeth_drain_output_queue(q, true);
2648         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2649         kfree(q);
2650 }
2651
2652 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2653 {
2654         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2655
2656         if (!q)
2657                 return NULL;
2658
2659         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2660                 kfree(q);
2661                 return NULL;
2662         }
2663         return q;
2664 }
2665
2666 static void qeth_tx_completion_timer(struct timer_list *timer)
2667 {
2668         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2669
2670         napi_schedule(&queue->napi);
2671         QETH_TXQ_STAT_INC(queue, completion_timer);
2672 }
2673
2674 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2675 {
2676         int i, j;
2677
2678         QETH_CARD_TEXT(card, 2, "allcqdbf");
2679
2680         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2681                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2682                 return 0;
2683
2684         QETH_CARD_TEXT(card, 2, "inq");
2685         card->qdio.in_q = qeth_alloc_qdio_queue();
2686         if (!card->qdio.in_q)
2687                 goto out_nomem;
2688
2689         /* inbound buffer pool */
2690         if (qeth_alloc_buffer_pool(card))
2691                 goto out_freeinq;
2692
2693         /* outbound */
2694         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2695                 struct qeth_qdio_out_q *queue;
2696
2697                 queue = qeth_alloc_output_queue();
2698                 if (!queue)
2699                         goto out_freeoutq;
2700                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2701                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2702                 card->qdio.out_qs[i] = queue;
2703                 queue->card = card;
2704                 queue->queue_no = i;
2705                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2706                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2707                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2708
2709                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2710                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2711                         WARN_ON(queue->bufs[j]);
2712                         if (qeth_init_qdio_out_buf(queue, j))
2713                                 goto out_freeoutqbufs;
2714                 }
2715         }
2716
2717         /* completion */
2718         if (qeth_alloc_cq(card))
2719                 goto out_freeoutq;
2720
2721         return 0;
2722
2723 out_freeoutqbufs:
2724         while (j > 0) {
2725                 --j;
2726                 kmem_cache_free(qeth_qdio_outbuf_cache,
2727                                 card->qdio.out_qs[i]->bufs[j]);
2728                 card->qdio.out_qs[i]->bufs[j] = NULL;
2729         }
2730 out_freeoutq:
2731         while (i > 0) {
2732                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2733                 card->qdio.out_qs[i] = NULL;
2734         }
2735         qeth_free_buffer_pool(card);
2736 out_freeinq:
2737         qeth_free_qdio_queue(card->qdio.in_q);
2738         card->qdio.in_q = NULL;
2739 out_nomem:
2740         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2741         return -ENOMEM;
2742 }
2743
2744 static void qeth_free_qdio_queues(struct qeth_card *card)
2745 {
2746         int i, j;
2747
2748         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2749                 QETH_QDIO_UNINITIALIZED)
2750                 return;
2751
2752         qeth_free_cq(card);
2753         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2754                 if (card->qdio.in_q->bufs[j].rx_skb)
2755                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2756         }
2757         qeth_free_qdio_queue(card->qdio.in_q);
2758         card->qdio.in_q = NULL;
2759         /* inbound buffer pool */
2760         qeth_free_buffer_pool(card);
2761         /* free outbound qdio_qs */
2762         for (i = 0; i < card->qdio.no_out_queues; i++) {
2763                 qeth_free_output_queue(card->qdio.out_qs[i]);
2764                 card->qdio.out_qs[i] = NULL;
2765         }
2766 }
2767
2768 static void qeth_create_qib_param_field(struct qeth_card *card,
2769                 char *param_field)
2770 {
2771
2772         param_field[0] = _ascebc['P'];
2773         param_field[1] = _ascebc['C'];
2774         param_field[2] = _ascebc['I'];
2775         param_field[3] = _ascebc['T'];
2776         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2777         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2778         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2779 }
2780
2781 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2782                 char *param_field)
2783 {
2784         param_field[16] = _ascebc['B'];
2785         param_field[17] = _ascebc['L'];
2786         param_field[18] = _ascebc['K'];
2787         param_field[19] = _ascebc['T'];
2788         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2789         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2790         *((unsigned int *) (&param_field[28])) =
2791                 card->info.blkt.inter_packet_jumbo;
2792 }
2793
2794 static int qeth_qdio_activate(struct qeth_card *card)
2795 {
2796         QETH_CARD_TEXT(card, 3, "qdioact");
2797         return qdio_activate(CARD_DDEV(card));
2798 }
2799
2800 static int qeth_dm_act(struct qeth_card *card)
2801 {
2802         struct qeth_cmd_buffer *iob;
2803
2804         QETH_CARD_TEXT(card, 2, "dmact");
2805
2806         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2807         if (!iob)
2808                 return -ENOMEM;
2809
2810         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2811                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2812         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2813                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2814         return qeth_send_control_data(card, iob, NULL, NULL);
2815 }
2816
2817 static int qeth_mpc_initialize(struct qeth_card *card)
2818 {
2819         int rc;
2820
2821         QETH_CARD_TEXT(card, 2, "mpcinit");
2822
2823         rc = qeth_issue_next_read(card);
2824         if (rc) {
2825                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2826                 return rc;
2827         }
2828         rc = qeth_cm_enable(card);
2829         if (rc) {
2830                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2831                 return rc;
2832         }
2833         rc = qeth_cm_setup(card);
2834         if (rc) {
2835                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2836                 return rc;
2837         }
2838         rc = qeth_ulp_enable(card);
2839         if (rc) {
2840                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2841                 return rc;
2842         }
2843         rc = qeth_ulp_setup(card);
2844         if (rc) {
2845                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2846                 return rc;
2847         }
2848         rc = qeth_alloc_qdio_queues(card);
2849         if (rc) {
2850                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2851                 return rc;
2852         }
2853         rc = qeth_qdio_establish(card);
2854         if (rc) {
2855                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2856                 qeth_free_qdio_queues(card);
2857                 return rc;
2858         }
2859         rc = qeth_qdio_activate(card);
2860         if (rc) {
2861                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2862                 return rc;
2863         }
2864         rc = qeth_dm_act(card);
2865         if (rc) {
2866                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2867                 return rc;
2868         }
2869
2870         return 0;
2871 }
2872
2873 void qeth_print_status_message(struct qeth_card *card)
2874 {
2875         switch (card->info.type) {
2876         case QETH_CARD_TYPE_OSD:
2877         case QETH_CARD_TYPE_OSM:
2878         case QETH_CARD_TYPE_OSX:
2879                 /* VM will use a non-zero first character
2880                  * to indicate a HiperSockets like reporting
2881                  * of the level OSA sets the first character to zero
2882                  * */
2883                 if (!card->info.mcl_level[0]) {
2884                         sprintf(card->info.mcl_level, "%02x%02x",
2885                                 card->info.mcl_level[2],
2886                                 card->info.mcl_level[3]);
2887                         break;
2888                 }
2889                 /* fallthrough */
2890         case QETH_CARD_TYPE_IQD:
2891                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2892                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2893                                 card->info.mcl_level[0]];
2894                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2895                                 card->info.mcl_level[1]];
2896                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2897                                 card->info.mcl_level[2]];
2898                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2899                                 card->info.mcl_level[3]];
2900                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2901                 }
2902                 break;
2903         default:
2904                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2905         }
2906         dev_info(&card->gdev->dev,
2907                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2908                  qeth_get_cardname(card),
2909                  (card->info.mcl_level[0]) ? " (level: " : "",
2910                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2911                  (card->info.mcl_level[0]) ? ")" : "",
2912                  qeth_get_cardname_short(card));
2913 }
2914 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2915
2916 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2917 {
2918         struct qeth_buffer_pool_entry *entry;
2919
2920         QETH_CARD_TEXT(card, 5, "inwrklst");
2921
2922         list_for_each_entry(entry,
2923                             &card->qdio.init_pool.entry_list, init_list) {
2924                 qeth_put_buffer_pool_entry(card, entry);
2925         }
2926 }
2927
2928 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2929                                         struct qeth_card *card)
2930 {
2931         struct qeth_buffer_pool_entry *entry;
2932         int i, free;
2933
2934         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2935                 return NULL;
2936
2937         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2938                 free = 1;
2939                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2940                         if (page_count(entry->elements[i]) > 1) {
2941                                 free = 0;
2942                                 break;
2943                         }
2944                 }
2945                 if (free) {
2946                         list_del_init(&entry->list);
2947                         return entry;
2948                 }
2949         }
2950
2951         /* no free buffer in pool so take first one and swap pages */
2952         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2953                                  struct qeth_buffer_pool_entry, list);
2954         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2955                 if (page_count(entry->elements[i]) > 1) {
2956                         struct page *page = dev_alloc_page();
2957
2958                         if (!page)
2959                                 return NULL;
2960
2961                         __free_page(entry->elements[i]);
2962                         entry->elements[i] = page;
2963                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2964                 }
2965         }
2966         list_del_init(&entry->list);
2967         return entry;
2968 }
2969
2970 static int qeth_init_input_buffer(struct qeth_card *card,
2971                 struct qeth_qdio_buffer *buf)
2972 {
2973         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2974         int i;
2975
2976         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2977                 buf->rx_skb = netdev_alloc_skb(card->dev,
2978                                                ETH_HLEN +
2979                                                sizeof(struct ipv6hdr));
2980                 if (!buf->rx_skb)
2981                         return -ENOMEM;
2982         }
2983
2984         if (!pool_entry) {
2985                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2986                 if (!pool_entry)
2987                         return -ENOBUFS;
2988
2989                 buf->pool_entry = pool_entry;
2990         }
2991
2992         /*
2993          * since the buffer is accessed only from the input_tasklet
2994          * there shouldn't be a need to synchronize; also, since we use
2995          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2996          * buffers
2997          */
2998         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2999                 buf->buffer->element[i].length = PAGE_SIZE;
3000                 buf->buffer->element[i].addr =
3001                         page_to_phys(pool_entry->elements[i]);
3002                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
3003                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
3004                 else
3005                         buf->buffer->element[i].eflags = 0;
3006                 buf->buffer->element[i].sflags = 0;
3007         }
3008         return 0;
3009 }
3010
3011 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
3012                                             struct qeth_qdio_out_q *queue)
3013 {
3014         if (!IS_IQD(card) ||
3015             qeth_iqd_is_mcast_queue(card, queue) ||
3016             card->options.cq == QETH_CQ_ENABLED ||
3017             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3018                 return 1;
3019
3020         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3021 }
3022
3023 static int qeth_init_qdio_queues(struct qeth_card *card)
3024 {
3025         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3026         unsigned int i;
3027         int rc;
3028
3029         QETH_CARD_TEXT(card, 2, "initqdqs");
3030
3031         /* inbound queue */
3032         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3033         memset(&card->rx, 0, sizeof(struct qeth_rx));
3034
3035         qeth_initialize_working_pool_list(card);
3036         /*give only as many buffers to hardware as we have buffer pool entries*/
3037         for (i = 0; i < rx_bufs; i++) {
3038                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3039                 if (rc)
3040                         return rc;
3041         }
3042
3043         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3044         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3045         if (rc) {
3046                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3047                 return rc;
3048         }
3049
3050         /* completion */
3051         rc = qeth_cq_init(card);
3052         if (rc) {
3053                 return rc;
3054         }
3055
3056         /* outbound queue */
3057         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3058                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3059
3060                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3061                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3062                 queue->next_buf_to_fill = 0;
3063                 queue->do_pack = 0;
3064                 queue->prev_hdr = NULL;
3065                 queue->coalesced_frames = 0;
3066                 queue->bulk_start = 0;
3067                 queue->bulk_count = 0;
3068                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3069                 atomic_set(&queue->used_buffers, 0);
3070                 atomic_set(&queue->set_pci_flags_count, 0);
3071                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3072                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3073         }
3074         return 0;
3075 }
3076
3077 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3078                                   struct qeth_cmd_buffer *iob)
3079 {
3080         qeth_mpc_finalize_cmd(card, iob);
3081
3082         /* override with IPA-specific values: */
3083         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3084 }
3085
3086 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3087                           u16 cmd_length,
3088                           bool (*match)(struct qeth_cmd_buffer *iob,
3089                                         struct qeth_cmd_buffer *reply))
3090 {
3091         u8 prot_type = qeth_mpc_select_prot_type(card);
3092         u16 total_length = iob->length;
3093
3094         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3095                        iob->data);
3096         iob->finalize = qeth_ipa_finalize_cmd;
3097         iob->match = match;
3098
3099         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3100         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3101         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3102         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3103         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3104         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3105                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3106         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3107 }
3108 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3109
3110 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3111                                  struct qeth_cmd_buffer *reply)
3112 {
3113         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3114
3115         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3116 }
3117
3118 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3119                                            enum qeth_ipa_cmds cmd_code,
3120                                            enum qeth_prot_versions prot,
3121                                            unsigned int data_length)
3122 {
3123         struct qeth_cmd_buffer *iob;
3124         struct qeth_ipacmd_hdr *hdr;
3125
3126         data_length += offsetof(struct qeth_ipa_cmd, data);
3127         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3128                              QETH_IPA_TIMEOUT);
3129         if (!iob)
3130                 return NULL;
3131
3132         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3133
3134         hdr = &__ipa_cmd(iob)->hdr;
3135         hdr->command = cmd_code;
3136         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3137         /* hdr->seqno is set by qeth_send_control_data() */
3138         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3139         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3140         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3141         hdr->param_count = 1;
3142         hdr->prot_version = prot;
3143         return iob;
3144 }
3145 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3146
3147 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3148                                 struct qeth_reply *reply, unsigned long data)
3149 {
3150         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3151
3152         return (cmd->hdr.return_code) ? -EIO : 0;
3153 }
3154
3155 /**
3156  * qeth_send_ipa_cmd() - send an IPA command
3157  *
3158  * See qeth_send_control_data() for explanation of the arguments.
3159  */
3160
3161 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3162                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3163                         unsigned long),
3164                 void *reply_param)
3165 {
3166         int rc;
3167
3168         QETH_CARD_TEXT(card, 4, "sendipa");
3169
3170         if (card->read_or_write_problem) {
3171                 qeth_put_cmd(iob);
3172                 return -EIO;
3173         }
3174
3175         if (reply_cb == NULL)
3176                 reply_cb = qeth_send_ipa_cmd_cb;
3177         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3178         if (rc == -ETIME) {
3179                 qeth_clear_ipacmd_list(card);
3180                 qeth_schedule_recovery(card);
3181         }
3182         return rc;
3183 }
3184 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3185
3186 static int qeth_send_startlan_cb(struct qeth_card *card,
3187                                  struct qeth_reply *reply, unsigned long data)
3188 {
3189         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3190
3191         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3192                 return -ENETDOWN;
3193
3194         return (cmd->hdr.return_code) ? -EIO : 0;
3195 }
3196
3197 static int qeth_send_startlan(struct qeth_card *card)
3198 {
3199         struct qeth_cmd_buffer *iob;
3200
3201         QETH_CARD_TEXT(card, 2, "strtlan");
3202
3203         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3204         if (!iob)
3205                 return -ENOMEM;
3206         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3207 }
3208
3209 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3210 {
3211         if (!cmd->hdr.return_code)
3212                 cmd->hdr.return_code =
3213                         cmd->data.setadapterparms.hdr.return_code;
3214         return cmd->hdr.return_code;
3215 }
3216
3217 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3218                 struct qeth_reply *reply, unsigned long data)
3219 {
3220         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3221         struct qeth_query_cmds_supp *query_cmd;
3222
3223         QETH_CARD_TEXT(card, 3, "quyadpcb");
3224         if (qeth_setadpparms_inspect_rc(cmd))
3225                 return -EIO;
3226
3227         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3228         if (query_cmd->lan_type & 0x7f) {
3229                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3230                         return -EPROTONOSUPPORT;
3231
3232                 card->info.link_type = query_cmd->lan_type;
3233                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3234         }
3235
3236         card->options.adp.supported = query_cmd->supported_cmds;
3237         return 0;
3238 }
3239
3240 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3241                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3242                                                     unsigned int data_length)
3243 {
3244         struct qeth_ipacmd_setadpparms_hdr *hdr;
3245         struct qeth_cmd_buffer *iob;
3246
3247         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3248                                  data_length +
3249                                  offsetof(struct qeth_ipacmd_setadpparms,
3250                                           data));
3251         if (!iob)
3252                 return NULL;
3253
3254         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3255         hdr->cmdlength = sizeof(*hdr) + data_length;
3256         hdr->command_code = adp_cmd;
3257         hdr->used_total = 1;
3258         hdr->seq_no = 1;
3259         return iob;
3260 }
3261
3262 static int qeth_query_setadapterparms(struct qeth_card *card)
3263 {
3264         int rc;
3265         struct qeth_cmd_buffer *iob;
3266
3267         QETH_CARD_TEXT(card, 3, "queryadp");
3268         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3269                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3270         if (!iob)
3271                 return -ENOMEM;
3272         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3273         return rc;
3274 }
3275
3276 static int qeth_query_ipassists_cb(struct qeth_card *card,
3277                 struct qeth_reply *reply, unsigned long data)
3278 {
3279         struct qeth_ipa_cmd *cmd;
3280
3281         QETH_CARD_TEXT(card, 2, "qipasscb");
3282
3283         cmd = (struct qeth_ipa_cmd *) data;
3284
3285         switch (cmd->hdr.return_code) {
3286         case IPA_RC_SUCCESS:
3287                 break;
3288         case IPA_RC_NOTSUPP:
3289         case IPA_RC_L2_UNSUPPORTED_CMD:
3290                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3291                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3292                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3293                 return -EOPNOTSUPP;
3294         default:
3295                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3296                                  CARD_DEVID(card), cmd->hdr.return_code);
3297                 return -EIO;
3298         }
3299
3300         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3301                 card->options.ipa4 = cmd->hdr.assists;
3302         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3303                 card->options.ipa6 = cmd->hdr.assists;
3304         else
3305                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3306                                  CARD_DEVID(card));
3307         return 0;
3308 }
3309
3310 static int qeth_query_ipassists(struct qeth_card *card,
3311                                 enum qeth_prot_versions prot)
3312 {
3313         int rc;
3314         struct qeth_cmd_buffer *iob;
3315
3316         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3317         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3318         if (!iob)
3319                 return -ENOMEM;
3320         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3321         return rc;
3322 }
3323
3324 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3325                                 struct qeth_reply *reply, unsigned long data)
3326 {
3327         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3328         struct qeth_query_switch_attributes *attrs;
3329         struct qeth_switch_info *sw_info;
3330
3331         QETH_CARD_TEXT(card, 2, "qswiatcb");
3332         if (qeth_setadpparms_inspect_rc(cmd))
3333                 return -EIO;
3334
3335         sw_info = (struct qeth_switch_info *)reply->param;
3336         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3337         sw_info->capabilities = attrs->capabilities;
3338         sw_info->settings = attrs->settings;
3339         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3340                         sw_info->settings);
3341         return 0;
3342 }
3343
3344 int qeth_query_switch_attributes(struct qeth_card *card,
3345                                  struct qeth_switch_info *sw_info)
3346 {
3347         struct qeth_cmd_buffer *iob;
3348
3349         QETH_CARD_TEXT(card, 2, "qswiattr");
3350         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3351                 return -EOPNOTSUPP;
3352         if (!netif_carrier_ok(card->dev))
3353                 return -ENOMEDIUM;
3354         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3355         if (!iob)
3356                 return -ENOMEM;
3357         return qeth_send_ipa_cmd(card, iob,
3358                                 qeth_query_switch_attributes_cb, sw_info);
3359 }
3360
3361 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3362                                           enum qeth_diags_cmds sub_cmd,
3363                                           unsigned int data_length)
3364 {
3365         struct qeth_ipacmd_diagass *cmd;
3366         struct qeth_cmd_buffer *iob;
3367
3368         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3369                                  DIAG_HDR_LEN + data_length);
3370         if (!iob)
3371                 return NULL;
3372
3373         cmd = &__ipa_cmd(iob)->data.diagass;
3374         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3375         cmd->subcmd = sub_cmd;
3376         return iob;
3377 }
3378 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3379
3380 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3381                 struct qeth_reply *reply, unsigned long data)
3382 {
3383         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3384         u16 rc = cmd->hdr.return_code;
3385
3386         if (rc) {
3387                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3388                 return -EIO;
3389         }
3390
3391         card->info.diagass_support = cmd->data.diagass.ext;
3392         return 0;
3393 }
3394
3395 static int qeth_query_setdiagass(struct qeth_card *card)
3396 {
3397         struct qeth_cmd_buffer *iob;
3398
3399         QETH_CARD_TEXT(card, 2, "qdiagass");
3400         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3401         if (!iob)
3402                 return -ENOMEM;
3403         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3404 }
3405
3406 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3407 {
3408         unsigned long info = get_zeroed_page(GFP_KERNEL);
3409         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3410         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3411         struct ccw_dev_id ccwid;
3412         int level;
3413
3414         tid->chpid = card->info.chpid;
3415         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3416         tid->ssid = ccwid.ssid;
3417         tid->devno = ccwid.devno;
3418         if (!info)
3419                 return;
3420         level = stsi(NULL, 0, 0, 0);
3421         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3422                 tid->lparnr = info222->lpar_number;
3423         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3424                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3425                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3426         }
3427         free_page(info);
3428         return;
3429 }
3430
3431 static int qeth_hw_trap_cb(struct qeth_card *card,
3432                 struct qeth_reply *reply, unsigned long data)
3433 {
3434         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3435         u16 rc = cmd->hdr.return_code;
3436
3437         if (rc) {
3438                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3439                 return -EIO;
3440         }
3441         return 0;
3442 }
3443
3444 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3445 {
3446         struct qeth_cmd_buffer *iob;
3447         struct qeth_ipa_cmd *cmd;
3448
3449         QETH_CARD_TEXT(card, 2, "diagtrap");
3450         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3451         if (!iob)
3452                 return -ENOMEM;
3453         cmd = __ipa_cmd(iob);
3454         cmd->data.diagass.type = 1;
3455         cmd->data.diagass.action = action;
3456         switch (action) {
3457         case QETH_DIAGS_TRAP_ARM:
3458                 cmd->data.diagass.options = 0x0003;
3459                 cmd->data.diagass.ext = 0x00010000 +
3460                         sizeof(struct qeth_trap_id);
3461                 qeth_get_trap_id(card,
3462                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3463                 break;
3464         case QETH_DIAGS_TRAP_DISARM:
3465                 cmd->data.diagass.options = 0x0001;
3466                 break;
3467         case QETH_DIAGS_TRAP_CAPTURE:
3468                 break;
3469         }
3470         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3471 }
3472
3473 static int qeth_check_qdio_errors(struct qeth_card *card,
3474                                   struct qdio_buffer *buf,
3475                                   unsigned int qdio_error,
3476                                   const char *dbftext)
3477 {
3478         if (qdio_error) {
3479                 QETH_CARD_TEXT(card, 2, dbftext);
3480                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3481                                buf->element[15].sflags);
3482                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3483                                buf->element[14].sflags);
3484                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3485                 if ((buf->element[15].sflags) == 0x12) {
3486                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3487                         return 0;
3488                 } else
3489                         return 1;
3490         }
3491         return 0;
3492 }
3493
3494 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3495                                          unsigned int count)
3496 {
3497         struct qeth_qdio_q *queue = card->qdio.in_q;
3498         struct list_head *lh;
3499         int i;
3500         int rc;
3501         int newcount = 0;
3502
3503         /* only requeue at a certain threshold to avoid SIGAs */
3504         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3505                 for (i = queue->next_buf_to_init;
3506                      i < queue->next_buf_to_init + count; ++i) {
3507                         if (qeth_init_input_buffer(card,
3508                                 &queue->bufs[QDIO_BUFNR(i)])) {
3509                                 break;
3510                         } else {
3511                                 newcount++;
3512                         }
3513                 }
3514
3515                 if (newcount < count) {
3516                         /* we are in memory shortage so we switch back to
3517                            traditional skb allocation and drop packages */
3518                         atomic_set(&card->force_alloc_skb, 3);
3519                         count = newcount;
3520                 } else {
3521                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3522                 }
3523
3524                 if (!count) {
3525                         i = 0;
3526                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3527                                 i++;
3528                         if (i == card->qdio.in_buf_pool.buf_count) {
3529                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3530                                 schedule_delayed_work(
3531                                         &card->buffer_reclaim_work,
3532                                         QETH_RECLAIM_WORK_TIME);
3533                         }
3534                         return 0;
3535                 }
3536
3537                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3538                              queue->next_buf_to_init, count);
3539                 if (rc) {
3540                         QETH_CARD_TEXT(card, 2, "qinberr");
3541                 }
3542                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3543                                                      count);
3544                 return count;
3545         }
3546
3547         return 0;
3548 }
3549
3550 static void qeth_buffer_reclaim_work(struct work_struct *work)
3551 {
3552         struct qeth_card *card = container_of(to_delayed_work(work),
3553                                               struct qeth_card,
3554                                               buffer_reclaim_work);
3555
3556         local_bh_disable();
3557         napi_schedule(&card->napi);
3558         /* kick-start the NAPI softirq: */
3559         local_bh_enable();
3560 }
3561
3562 static void qeth_handle_send_error(struct qeth_card *card,
3563                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3564 {
3565         int sbalf15 = buffer->buffer->element[15].sflags;
3566
3567         QETH_CARD_TEXT(card, 6, "hdsnderr");
3568         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3569
3570         if (!qdio_err)
3571                 return;
3572
3573         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3574                 return;
3575
3576         QETH_CARD_TEXT(card, 1, "lnkfail");
3577         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3578                        (u16)qdio_err, (u8)sbalf15);
3579 }
3580
3581 /**
3582  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3583  * @queue: queue to check for packing buffer
3584  *
3585  * Returns number of buffers that were prepared for flush.
3586  */
3587 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3588 {
3589         struct qeth_qdio_out_buffer *buffer;
3590
3591         buffer = queue->bufs[queue->next_buf_to_fill];
3592         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3593             (buffer->next_element_to_fill > 0)) {
3594                 /* it's a packing buffer */
3595                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3596                 queue->next_buf_to_fill =
3597                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3598                 return 1;
3599         }
3600         return 0;
3601 }
3602
3603 /*
3604  * Switched to packing state if the number of used buffers on a queue
3605  * reaches a certain limit.
3606  */
3607 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3608 {
3609         if (!queue->do_pack) {
3610                 if (atomic_read(&queue->used_buffers)
3611                     >= QETH_HIGH_WATERMARK_PACK){
3612                         /* switch non-PACKING -> PACKING */
3613                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3614                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3615                         queue->do_pack = 1;
3616                 }
3617         }
3618 }
3619
3620 /*
3621  * Switches from packing to non-packing mode. If there is a packing
3622  * buffer on the queue this buffer will be prepared to be flushed.
3623  * In that case 1 is returned to inform the caller. If no buffer
3624  * has to be flushed, zero is returned.
3625  */
3626 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3627 {
3628         if (queue->do_pack) {
3629                 if (atomic_read(&queue->used_buffers)
3630                     <= QETH_LOW_WATERMARK_PACK) {
3631                         /* switch PACKING -> non-PACKING */
3632                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3633                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3634                         queue->do_pack = 0;
3635                         return qeth_prep_flush_pack_buffer(queue);
3636                 }
3637         }
3638         return 0;
3639 }
3640
3641 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3642                                int count)
3643 {
3644         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3645         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3646         struct qeth_card *card = queue->card;
3647         int rc;
3648         int i;
3649
3650         for (i = index; i < index + count; ++i) {
3651                 unsigned int bidx = QDIO_BUFNR(i);
3652                 struct sk_buff *skb;
3653
3654                 buf = queue->bufs[bidx];
3655                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3656                                 SBAL_EFLAGS_LAST_ENTRY;
3657                 queue->coalesced_frames += buf->frames;
3658
3659                 if (queue->bufstates)
3660                         queue->bufstates[bidx].user = buf;
3661
3662                 if (IS_IQD(card)) {
3663                         skb_queue_walk(&buf->skb_list, skb)
3664                                 skb_tx_timestamp(skb);
3665                 }
3666         }
3667
3668         if (!IS_IQD(card)) {
3669                 if (!queue->do_pack) {
3670                         if ((atomic_read(&queue->used_buffers) >=
3671                                 (QETH_HIGH_WATERMARK_PACK -
3672                                  QETH_WATERMARK_PACK_FUZZ)) &&
3673                             !atomic_read(&queue->set_pci_flags_count)) {
3674                                 /* it's likely that we'll go to packing
3675                                  * mode soon */
3676                                 atomic_inc(&queue->set_pci_flags_count);
3677                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3678                         }
3679                 } else {
3680                         if (!atomic_read(&queue->set_pci_flags_count)) {
3681                                 /*
3682                                  * there's no outstanding PCI any more, so we
3683                                  * have to request a PCI to be sure the the PCI
3684                                  * will wake at some time in the future then we
3685                                  * can flush packed buffers that might still be
3686                                  * hanging around, which can happen if no
3687                                  * further send was requested by the stack
3688                                  */
3689                                 atomic_inc(&queue->set_pci_flags_count);
3690                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3691                         }
3692                 }
3693
3694                 if (atomic_read(&queue->set_pci_flags_count))
3695                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3696         }
3697
3698         QETH_TXQ_STAT_INC(queue, doorbell);
3699         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3700                      queue->queue_no, index, count);
3701
3702         /* Fake the TX completion interrupt: */
3703         if (IS_IQD(card)) {
3704                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3705                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3706
3707                 if (frames && queue->coalesced_frames >= frames) {
3708                         napi_schedule(&queue->napi);
3709                         queue->coalesced_frames = 0;
3710                         QETH_TXQ_STAT_INC(queue, coal_frames);
3711                 } else if (usecs) {
3712                         qeth_tx_arm_timer(queue, usecs);
3713                 }
3714         }
3715
3716         if (rc) {
3717                 /* ignore temporary SIGA errors without busy condition */
3718                 if (rc == -ENOBUFS)
3719                         return;
3720                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3721                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3722                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3723                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3724                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3725
3726                 /* this must not happen under normal circumstances. if it
3727                  * happens something is really wrong -> recover */
3728                 qeth_schedule_recovery(queue->card);
3729                 return;
3730         }
3731 }
3732
3733 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3734 {
3735         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3736
3737         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3738         queue->prev_hdr = NULL;
3739         queue->bulk_count = 0;
3740 }
3741
3742 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3743 {
3744         int index;
3745         int flush_cnt = 0;
3746         int q_was_packing = 0;
3747
3748         /*
3749          * check if weed have to switch to non-packing mode or if
3750          * we have to get a pci flag out on the queue
3751          */
3752         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3753             !atomic_read(&queue->set_pci_flags_count)) {
3754                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3755                                 QETH_OUT_Q_UNLOCKED) {
3756                         /*
3757                          * If we get in here, there was no action in
3758                          * do_send_packet. So, we check if there is a
3759                          * packing buffer to be flushed here.
3760                          */
3761                         index = queue->next_buf_to_fill;
3762                         q_was_packing = queue->do_pack;
3763                         /* queue->do_pack may change */
3764                         barrier();
3765                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3766                         if (!flush_cnt &&
3767                             !atomic_read(&queue->set_pci_flags_count))
3768                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3769                         if (q_was_packing)
3770                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3771                         if (flush_cnt)
3772                                 qeth_flush_buffers(queue, index, flush_cnt);
3773                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3774                 }
3775         }
3776 }
3777
3778 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3779 {
3780         struct qeth_card *card = (struct qeth_card *)card_ptr;
3781
3782         napi_schedule_irqoff(&card->napi);
3783 }
3784
3785 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3786 {
3787         int rc;
3788
3789         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3790                 rc = -1;
3791                 goto out;
3792         } else {
3793                 if (card->options.cq == cq) {
3794                         rc = 0;
3795                         goto out;
3796                 }
3797
3798                 qeth_free_qdio_queues(card);
3799                 card->options.cq = cq;
3800                 rc = 0;
3801         }
3802 out:
3803         return rc;
3804
3805 }
3806 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3807
3808 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3809                                  unsigned int queue, int first_element,
3810                                  int count)
3811 {
3812         struct qeth_qdio_q *cq = card->qdio.c_q;
3813         int i;
3814         int rc;
3815
3816         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3817         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3818         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3819
3820         if (qdio_err) {
3821                 netif_tx_stop_all_queues(card->dev);
3822                 qeth_schedule_recovery(card);
3823                 return;
3824         }
3825
3826         for (i = first_element; i < first_element + count; ++i) {
3827                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3828                 int e = 0;
3829
3830                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3831                        buffer->element[e].addr) {
3832                         unsigned long phys_aob_addr = buffer->element[e].addr;
3833
3834                         qeth_qdio_handle_aob(card, phys_aob_addr);
3835                         ++e;
3836                 }
3837                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3838         }
3839         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3840                     card->qdio.c_q->next_buf_to_init,
3841                     count);
3842         if (rc) {
3843                 dev_warn(&card->gdev->dev,
3844                         "QDIO reported an error, rc=%i\n", rc);
3845                 QETH_CARD_TEXT(card, 2, "qcqherr");
3846         }
3847
3848         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3849 }
3850
3851 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3852                                     unsigned int qdio_err, int queue,
3853                                     int first_elem, int count,
3854                                     unsigned long card_ptr)
3855 {
3856         struct qeth_card *card = (struct qeth_card *)card_ptr;
3857
3858         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3859         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3860
3861         if (qdio_err)
3862                 qeth_schedule_recovery(card);
3863 }
3864
3865 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3866                                      unsigned int qdio_error, int __queue,
3867                                      int first_element, int count,
3868                                      unsigned long card_ptr)
3869 {
3870         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3871         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3872         struct net_device *dev = card->dev;
3873         struct netdev_queue *txq;
3874         int i;
3875
3876         QETH_CARD_TEXT(card, 6, "qdouhdl");
3877         if (qdio_error & QDIO_ERROR_FATAL) {
3878                 QETH_CARD_TEXT(card, 2, "achkcond");
3879                 netif_tx_stop_all_queues(dev);
3880                 qeth_schedule_recovery(card);
3881                 return;
3882         }
3883
3884         for (i = first_element; i < (first_element + count); ++i) {
3885                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3886
3887                 qeth_handle_send_error(card, buf, qdio_error);
3888                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3889         }
3890
3891         atomic_sub(count, &queue->used_buffers);
3892         qeth_check_outbound_queue(queue);
3893
3894         txq = netdev_get_tx_queue(dev, __queue);
3895         /* xmit may have observed the full-condition, but not yet stopped the
3896          * txq. In which case the code below won't trigger. So before returning,
3897          * xmit will re-check the txq's fill level and wake it up if needed.
3898          */
3899         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3900                 netif_tx_wake_queue(txq);
3901 }
3902
3903 /**
3904  * Note: Function assumes that we have 4 outbound queues.
3905  */
3906 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3907 {
3908         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3909         u8 tos;
3910
3911         switch (card->qdio.do_prio_queueing) {
3912         case QETH_PRIO_Q_ING_TOS:
3913         case QETH_PRIO_Q_ING_PREC:
3914                 switch (qeth_get_ip_version(skb)) {
3915                 case 4:
3916                         tos = ipv4_get_dsfield(ip_hdr(skb));
3917                         break;
3918                 case 6:
3919                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3920                         break;
3921                 default:
3922                         return card->qdio.default_out_queue;
3923                 }
3924                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3925                         return ~tos >> 6 & 3;
3926                 if (tos & IPTOS_MINCOST)
3927                         return 3;
3928                 if (tos & IPTOS_RELIABILITY)
3929                         return 2;
3930                 if (tos & IPTOS_THROUGHPUT)
3931                         return 1;
3932                 if (tos & IPTOS_LOWDELAY)
3933                         return 0;
3934                 break;
3935         case QETH_PRIO_Q_ING_SKB:
3936                 if (skb->priority > 5)
3937                         return 0;
3938                 return ~skb->priority >> 1 & 3;
3939         case QETH_PRIO_Q_ING_VLAN:
3940                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3941                         return ~ntohs(veth->h_vlan_TCI) >>
3942                                (VLAN_PRIO_SHIFT + 1) & 3;
3943                 break;
3944         case QETH_PRIO_Q_ING_FIXED:
3945                 return card->qdio.default_out_queue;
3946         default:
3947                 break;
3948         }
3949         return card->qdio.default_out_queue;
3950 }
3951 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3952
3953 /**
3954  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3955  * @skb:                                SKB address
3956  *
3957  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3958  * fragmented part of the SKB. Returns zero for linear SKB.
3959  */
3960 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3961 {
3962         int cnt, elements = 0;
3963
3964         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3965                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3966
3967                 elements += qeth_get_elements_for_range(
3968                         (addr_t)skb_frag_address(frag),
3969                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3970         }
3971         return elements;
3972 }
3973
3974 /**
3975  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3976  *                              to transmit an skb.
3977  * @skb:                        the skb to operate on.
3978  * @data_offset:                skip this part of the skb's linear data
3979  *
3980  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3981  * skb's data (both its linear part and paged fragments).
3982  */
3983 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3984 {
3985         unsigned int elements = qeth_get_elements_for_frags(skb);
3986         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3987         addr_t start = (addr_t)skb->data + data_offset;
3988
3989         if (start != end)
3990                 elements += qeth_get_elements_for_range(start, end);
3991         return elements;
3992 }
3993 EXPORT_SYMBOL_GPL(qeth_count_elements);
3994
3995 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3996                                          MAX_TCP_HEADER)
3997
3998 /**
3999  * qeth_add_hw_header() - add a HW header to an skb.
4000  * @skb: skb that the HW header should be added to.
4001  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
4002  *       it contains a valid pointer to a qeth_hdr.
4003  * @hdr_len: length of the HW header.
4004  * @proto_len: length of protocol headers that need to be in same page as the
4005  *             HW header.
4006  *
4007  * Returns the pushed length. If the header can't be pushed on
4008  * (eg. because it would cross a page boundary), it is allocated from
4009  * the cache instead and 0 is returned.
4010  * The number of needed buffer elements is returned in @elements.
4011  * Error to create the hdr is indicated by returning with < 0.
4012  */
4013 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4014                               struct sk_buff *skb, struct qeth_hdr **hdr,
4015                               unsigned int hdr_len, unsigned int proto_len,
4016                               unsigned int *elements)
4017 {
4018         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4019         const unsigned int contiguous = proto_len ? proto_len : 1;
4020         const unsigned int max_elements = queue->max_elements;
4021         unsigned int __elements;
4022         addr_t start, end;
4023         bool push_ok;
4024         int rc;
4025
4026 check_layout:
4027         start = (addr_t)skb->data - hdr_len;
4028         end = (addr_t)skb->data;
4029
4030         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4031                 /* Push HW header into same page as first protocol header. */
4032                 push_ok = true;
4033                 /* ... but TSO always needs a separate element for headers: */
4034                 if (skb_is_gso(skb))
4035                         __elements = 1 + qeth_count_elements(skb, proto_len);
4036                 else
4037                         __elements = qeth_count_elements(skb, 0);
4038         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4039                 /* Push HW header into preceding page, flush with skb->data. */
4040                 push_ok = true;
4041                 __elements = 1 + qeth_count_elements(skb, 0);
4042         } else {
4043                 /* Use header cache, copy protocol headers up. */
4044                 push_ok = false;
4045                 __elements = 1 + qeth_count_elements(skb, proto_len);
4046         }
4047
4048         /* Compress skb to fit into one IO buffer: */
4049         if (__elements > max_elements) {
4050                 if (!skb_is_nonlinear(skb)) {
4051                         /* Drop it, no easy way of shrinking it further. */
4052                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4053                                          max_elements, __elements, skb->len);
4054                         return -E2BIG;
4055                 }
4056
4057                 rc = skb_linearize(skb);
4058                 if (rc) {
4059                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4060                         return rc;
4061                 }
4062
4063                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4064                 /* Linearization changed the layout, re-evaluate: */
4065                 goto check_layout;
4066         }
4067
4068         *elements = __elements;
4069         /* Add the header: */
4070         if (push_ok) {
4071                 *hdr = skb_push(skb, hdr_len);
4072                 return hdr_len;
4073         }
4074
4075         /* Fall back to cache element with known-good alignment: */
4076         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4077                 return -E2BIG;
4078         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4079         if (!*hdr)
4080                 return -ENOMEM;
4081         /* Copy protocol headers behind HW header: */
4082         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4083         return 0;
4084 }
4085
4086 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4087                               struct sk_buff *curr_skb,
4088                               struct qeth_hdr *curr_hdr)
4089 {
4090         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4091         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4092
4093         if (!prev_hdr)
4094                 return true;
4095
4096         /* All packets must have the same target: */
4097         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4098                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4099
4100                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4101                                         eth_hdr(curr_skb)->h_dest) &&
4102                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4103         }
4104
4105         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4106                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4107 }
4108
4109 /**
4110  * qeth_fill_buffer() - map skb into an output buffer
4111  * @buf:        buffer to transport the skb
4112  * @skb:        skb to map into the buffer
4113  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4114  *              from qeth_core_header_cache.
4115  * @offset:     when mapping the skb, start at skb->data + offset
4116  * @hd_len:     if > 0, build a dedicated header element of this size
4117  */
4118 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4119                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4120                                      unsigned int offset, unsigned int hd_len)
4121 {
4122         struct qdio_buffer *buffer = buf->buffer;
4123         int element = buf->next_element_to_fill;
4124         int length = skb_headlen(skb) - offset;
4125         char *data = skb->data + offset;
4126         unsigned int elem_length, cnt;
4127         bool is_first_elem = true;
4128
4129         __skb_queue_tail(&buf->skb_list, skb);
4130
4131         /* build dedicated element for HW Header */
4132         if (hd_len) {
4133                 is_first_elem = false;
4134
4135                 buffer->element[element].addr = virt_to_phys(hdr);
4136                 buffer->element[element].length = hd_len;
4137                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4138
4139                 /* HW header is allocated from cache: */
4140                 if ((void *)hdr != skb->data)
4141                         buf->is_header[element] = 1;
4142                 /* HW header was pushed and is contiguous with linear part: */
4143                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4144                          (data == (char *)hdr + hd_len))
4145                         buffer->element[element].eflags |=
4146                                 SBAL_EFLAGS_CONTIGUOUS;
4147
4148                 element++;
4149         }
4150
4151         /* map linear part into buffer element(s) */
4152         while (length > 0) {
4153                 elem_length = min_t(unsigned int, length,
4154                                     PAGE_SIZE - offset_in_page(data));
4155
4156                 buffer->element[element].addr = virt_to_phys(data);
4157                 buffer->element[element].length = elem_length;
4158                 length -= elem_length;
4159                 if (is_first_elem) {
4160                         is_first_elem = false;
4161                         if (length || skb_is_nonlinear(skb))
4162                                 /* skb needs additional elements */
4163                                 buffer->element[element].eflags =
4164                                         SBAL_EFLAGS_FIRST_FRAG;
4165                         else
4166                                 buffer->element[element].eflags = 0;
4167                 } else {
4168                         buffer->element[element].eflags =
4169                                 SBAL_EFLAGS_MIDDLE_FRAG;
4170                 }
4171
4172                 data += elem_length;
4173                 element++;
4174         }
4175
4176         /* map page frags into buffer element(s) */
4177         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4178                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4179
4180                 data = skb_frag_address(frag);
4181                 length = skb_frag_size(frag);
4182                 while (length > 0) {
4183                         elem_length = min_t(unsigned int, length,
4184                                             PAGE_SIZE - offset_in_page(data));
4185
4186                         buffer->element[element].addr = virt_to_phys(data);
4187                         buffer->element[element].length = elem_length;
4188                         buffer->element[element].eflags =
4189                                 SBAL_EFLAGS_MIDDLE_FRAG;
4190
4191                         length -= elem_length;
4192                         data += elem_length;
4193                         element++;
4194                 }
4195         }
4196
4197         if (buffer->element[element - 1].eflags)
4198                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4199         buf->next_element_to_fill = element;
4200         return element;
4201 }
4202
4203 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4204                        struct sk_buff *skb, unsigned int elements,
4205                        struct qeth_hdr *hdr, unsigned int offset,
4206                        unsigned int hd_len)
4207 {
4208         unsigned int bytes = qdisc_pkt_len(skb);
4209         struct qeth_qdio_out_buffer *buffer;
4210         unsigned int next_element;
4211         struct netdev_queue *txq;
4212         bool stopped = false;
4213         bool flush;
4214
4215         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4216         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4217
4218         /* Just a sanity check, the wake/stop logic should ensure that we always
4219          * get a free buffer.
4220          */
4221         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4222                 return -EBUSY;
4223
4224         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4225
4226         if (flush ||
4227             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4228                 if (buffer->next_element_to_fill > 0) {
4229                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4230                         queue->bulk_count++;
4231                 }
4232
4233                 if (queue->bulk_count >= queue->bulk_max)
4234                         flush = true;
4235
4236                 if (flush)
4237                         qeth_flush_queue(queue);
4238
4239                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4240                                                 queue->bulk_count)];
4241
4242                 /* Sanity-check again: */
4243                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4244                         return -EBUSY;
4245         }
4246
4247         if (buffer->next_element_to_fill == 0 &&
4248             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4249                 /* If a TX completion happens right _here_ and misses to wake
4250                  * the txq, then our re-check below will catch the race.
4251                  */
4252                 QETH_TXQ_STAT_INC(queue, stopped);
4253                 netif_tx_stop_queue(txq);
4254                 stopped = true;
4255         }
4256
4257         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4258         buffer->bytes += bytes;
4259         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4260         queue->prev_hdr = hdr;
4261
4262         flush = __netdev_tx_sent_queue(txq, bytes,
4263                                        !stopped && netdev_xmit_more());
4264
4265         if (flush || next_element >= queue->max_elements) {
4266                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4267                 queue->bulk_count++;
4268
4269                 if (queue->bulk_count >= queue->bulk_max)
4270                         flush = true;
4271
4272                 if (flush)
4273                         qeth_flush_queue(queue);
4274         }
4275
4276         if (stopped && !qeth_out_queue_is_full(queue))
4277                 netif_tx_start_queue(txq);
4278         return 0;
4279 }
4280
4281 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4282                         struct sk_buff *skb, struct qeth_hdr *hdr,
4283                         unsigned int offset, unsigned int hd_len,
4284                         int elements_needed)
4285 {
4286         struct qeth_qdio_out_buffer *buffer;
4287         unsigned int next_element;
4288         struct netdev_queue *txq;
4289         bool stopped = false;
4290         int start_index;
4291         int flush_count = 0;
4292         int do_pack = 0;
4293         int tmp;
4294         int rc = 0;
4295
4296         /* spin until we get the queue ... */
4297         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4298                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4299         start_index = queue->next_buf_to_fill;
4300         buffer = queue->bufs[queue->next_buf_to_fill];
4301
4302         /* Just a sanity check, the wake/stop logic should ensure that we always
4303          * get a free buffer.
4304          */
4305         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4306                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4307                 return -EBUSY;
4308         }
4309
4310         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4311
4312         /* check if we need to switch packing state of this queue */
4313         qeth_switch_to_packing_if_needed(queue);
4314         if (queue->do_pack) {
4315                 do_pack = 1;
4316                 /* does packet fit in current buffer? */
4317                 if (buffer->next_element_to_fill + elements_needed >
4318                     queue->max_elements) {
4319                         /* ... no -> set state PRIMED */
4320                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4321                         flush_count++;
4322                         queue->next_buf_to_fill =
4323                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4324                         buffer = queue->bufs[queue->next_buf_to_fill];
4325
4326                         /* We stepped forward, so sanity-check again: */
4327                         if (atomic_read(&buffer->state) !=
4328                             QETH_QDIO_BUF_EMPTY) {
4329                                 qeth_flush_buffers(queue, start_index,
4330                                                            flush_count);
4331                                 atomic_set(&queue->state,
4332                                                 QETH_OUT_Q_UNLOCKED);
4333                                 rc = -EBUSY;
4334                                 goto out;
4335                         }
4336                 }
4337         }
4338
4339         if (buffer->next_element_to_fill == 0 &&
4340             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4341                 /* If a TX completion happens right _here_ and misses to wake
4342                  * the txq, then our re-check below will catch the race.
4343                  */
4344                 QETH_TXQ_STAT_INC(queue, stopped);
4345                 netif_tx_stop_queue(txq);
4346                 stopped = true;
4347         }
4348
4349         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4350         buffer->bytes += qdisc_pkt_len(skb);
4351         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4352
4353         if (queue->do_pack)
4354                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4355         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4356                 flush_count++;
4357                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4358                 queue->next_buf_to_fill =
4359                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4360         }
4361
4362         if (flush_count)
4363                 qeth_flush_buffers(queue, start_index, flush_count);
4364         else if (!atomic_read(&queue->set_pci_flags_count))
4365                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4366         /*
4367          * queue->state will go from LOCKED -> UNLOCKED or from
4368          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4369          * (switch packing state or flush buffer to get another pci flag out).
4370          * In that case we will enter this loop
4371          */
4372         while (atomic_dec_return(&queue->state)) {
4373                 start_index = queue->next_buf_to_fill;
4374                 /* check if we can go back to non-packing state */
4375                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4376                 /*
4377                  * check if we need to flush a packing buffer to get a pci
4378                  * flag out on the queue
4379                  */
4380                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4381                         tmp = qeth_prep_flush_pack_buffer(queue);
4382                 if (tmp) {
4383                         qeth_flush_buffers(queue, start_index, tmp);
4384                         flush_count += tmp;
4385                 }
4386         }
4387 out:
4388         /* at this point the queue is UNLOCKED again */
4389         if (do_pack)
4390                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4391
4392         if (stopped && !qeth_out_queue_is_full(queue))
4393                 netif_tx_start_queue(txq);
4394         return rc;
4395 }
4396 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4397
4398 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4399                               unsigned int payload_len, struct sk_buff *skb,
4400                               unsigned int proto_len)
4401 {
4402         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4403
4404         ext->hdr_tot_len = sizeof(*ext);
4405         ext->imb_hdr_no = 1;
4406         ext->hdr_type = 1;
4407         ext->hdr_version = 1;
4408         ext->hdr_len = 28;
4409         ext->payload_len = payload_len;
4410         ext->mss = skb_shinfo(skb)->gso_size;
4411         ext->dg_hdr_len = proto_len;
4412 }
4413
4414 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4415               struct qeth_qdio_out_q *queue, int ipv,
4416               void (*fill_header)(struct qeth_qdio_out_q *queue,
4417                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4418                                   int ipv, unsigned int data_len))
4419 {
4420         unsigned int proto_len, hw_hdr_len;
4421         unsigned int frame_len = skb->len;
4422         bool is_tso = skb_is_gso(skb);
4423         unsigned int data_offset = 0;
4424         struct qeth_hdr *hdr = NULL;
4425         unsigned int hd_len = 0;
4426         unsigned int elements;
4427         int push_len, rc;
4428
4429         if (is_tso) {
4430                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4431                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4432         } else {
4433                 hw_hdr_len = sizeof(struct qeth_hdr);
4434                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4435         }
4436
4437         rc = skb_cow_head(skb, hw_hdr_len);
4438         if (rc)
4439                 return rc;
4440
4441         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4442                                       &elements);
4443         if (push_len < 0)
4444                 return push_len;
4445         if (is_tso || !push_len) {
4446                 /* HW header needs its own buffer element. */
4447                 hd_len = hw_hdr_len + proto_len;
4448                 data_offset = push_len + proto_len;
4449         }
4450         memset(hdr, 0, hw_hdr_len);
4451         fill_header(queue, hdr, skb, ipv, frame_len);
4452         if (is_tso)
4453                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4454                                   frame_len - proto_len, skb, proto_len);
4455
4456         if (IS_IQD(card)) {
4457                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4458                                  hd_len);
4459         } else {
4460                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4461                 skb_orphan(skb);
4462                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4463                                          hd_len, elements);
4464         }
4465
4466         if (rc && !push_len)
4467                 kmem_cache_free(qeth_core_header_cache, hdr);
4468
4469         return rc;
4470 }
4471 EXPORT_SYMBOL_GPL(qeth_xmit);
4472
4473 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4474                 struct qeth_reply *reply, unsigned long data)
4475 {
4476         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4477         struct qeth_ipacmd_setadpparms *setparms;
4478
4479         QETH_CARD_TEXT(card, 4, "prmadpcb");
4480
4481         setparms = &(cmd->data.setadapterparms);
4482         if (qeth_setadpparms_inspect_rc(cmd)) {
4483                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4484                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4485         }
4486         card->info.promisc_mode = setparms->data.mode;
4487         return (cmd->hdr.return_code) ? -EIO : 0;
4488 }
4489
4490 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4491 {
4492         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4493                                                     SET_PROMISC_MODE_OFF;
4494         struct qeth_cmd_buffer *iob;
4495         struct qeth_ipa_cmd *cmd;
4496
4497         QETH_CARD_TEXT(card, 4, "setprom");
4498         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4499
4500         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4501                                    SETADP_DATA_SIZEOF(mode));
4502         if (!iob)
4503                 return;
4504         cmd = __ipa_cmd(iob);
4505         cmd->data.setadapterparms.data.mode = mode;
4506         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4507 }
4508 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4509
4510 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4511                 struct qeth_reply *reply, unsigned long data)
4512 {
4513         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4514         struct qeth_ipacmd_setadpparms *adp_cmd;
4515
4516         QETH_CARD_TEXT(card, 4, "chgmaccb");
4517         if (qeth_setadpparms_inspect_rc(cmd))
4518                 return -EIO;
4519
4520         adp_cmd = &cmd->data.setadapterparms;
4521         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4522                 return -EADDRNOTAVAIL;
4523
4524         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4525             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4526                 return -EADDRNOTAVAIL;
4527
4528         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4529         return 0;
4530 }
4531
4532 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4533 {
4534         int rc;
4535         struct qeth_cmd_buffer *iob;
4536         struct qeth_ipa_cmd *cmd;
4537
4538         QETH_CARD_TEXT(card, 4, "chgmac");
4539
4540         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4541                                    SETADP_DATA_SIZEOF(change_addr));
4542         if (!iob)
4543                 return -ENOMEM;
4544         cmd = __ipa_cmd(iob);
4545         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4546         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4547         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4548                         card->dev->dev_addr);
4549         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4550                                NULL);
4551         return rc;
4552 }
4553 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4554
4555 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4556                 struct qeth_reply *reply, unsigned long data)
4557 {
4558         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4559         struct qeth_set_access_ctrl *access_ctrl_req;
4560
4561         QETH_CARD_TEXT(card, 4, "setaccb");
4562
4563         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4564         QETH_CARD_TEXT_(card, 2, "rc=%d",
4565                         cmd->data.setadapterparms.hdr.return_code);
4566         if (cmd->data.setadapterparms.hdr.return_code !=
4567                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4568                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4569                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4570                                  cmd->data.setadapterparms.hdr.return_code);
4571         switch (qeth_setadpparms_inspect_rc(cmd)) {
4572         case SET_ACCESS_CTRL_RC_SUCCESS:
4573                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4574                         dev_info(&card->gdev->dev,
4575                             "QDIO data connection isolation is deactivated\n");
4576                 else
4577                         dev_info(&card->gdev->dev,
4578                             "QDIO data connection isolation is activated\n");
4579                 return 0;
4580         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4581                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4582                                  CARD_DEVID(card));
4583                 return 0;
4584         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4585                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4586                                  CARD_DEVID(card));
4587                 return 0;
4588         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4589                 dev_err(&card->gdev->dev, "Adapter does not "
4590                         "support QDIO data connection isolation\n");
4591                 return -EOPNOTSUPP;
4592         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4593                 dev_err(&card->gdev->dev,
4594                         "Adapter is dedicated. "
4595                         "QDIO data connection isolation not supported\n");
4596                 return -EOPNOTSUPP;
4597         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4598                 dev_err(&card->gdev->dev,
4599                         "TSO does not permit QDIO data connection isolation\n");
4600                 return -EPERM;
4601         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4602                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4603                         "support reflective relay mode\n");
4604                 return -EOPNOTSUPP;
4605         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4606                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4607                                         "enabled at the adjacent switch port");
4608                 return -EREMOTEIO;
4609         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4610                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4611                                         "at the adjacent switch failed\n");
4612                 /* benign error while disabling ISOLATION_MODE_FWD */
4613                 return 0;
4614         default:
4615                 return -EIO;
4616         }
4617 }
4618
4619 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4620                                      enum qeth_ipa_isolation_modes mode)
4621 {
4622         int rc;
4623         struct qeth_cmd_buffer *iob;
4624         struct qeth_ipa_cmd *cmd;
4625         struct qeth_set_access_ctrl *access_ctrl_req;
4626
4627         QETH_CARD_TEXT(card, 4, "setacctl");
4628
4629         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4630                 dev_err(&card->gdev->dev,
4631                         "Adapter does not support QDIO data connection isolation\n");
4632                 return -EOPNOTSUPP;
4633         }
4634
4635         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4636                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4637         if (!iob)
4638                 return -ENOMEM;
4639         cmd = __ipa_cmd(iob);
4640         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4641         access_ctrl_req->subcmd_code = mode;
4642
4643         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4644                                NULL);
4645         if (rc) {
4646                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4647                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4648                                  rc, CARD_DEVID(card));
4649         }
4650
4651         return rc;
4652 }
4653
4654 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4655 {
4656         struct qeth_card *card;
4657
4658         card = dev->ml_priv;
4659         QETH_CARD_TEXT(card, 4, "txtimeo");
4660         qeth_schedule_recovery(card);
4661 }
4662 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4663
4664 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4665 {
4666         struct qeth_card *card = dev->ml_priv;
4667         int rc = 0;
4668
4669         switch (regnum) {
4670         case MII_BMCR: /* Basic mode control register */
4671                 rc = BMCR_FULLDPLX;
4672                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4673                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4674                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4675                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4676                         rc |= BMCR_SPEED100;
4677                 break;
4678         case MII_BMSR: /* Basic mode status register */
4679                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4680                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4681                      BMSR_100BASE4;
4682                 break;
4683         case MII_PHYSID1: /* PHYS ID 1 */
4684                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4685                      dev->dev_addr[2];
4686                 rc = (rc >> 5) & 0xFFFF;
4687                 break;
4688         case MII_PHYSID2: /* PHYS ID 2 */
4689                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4690                 break;
4691         case MII_ADVERTISE: /* Advertisement control reg */
4692                 rc = ADVERTISE_ALL;
4693                 break;
4694         case MII_LPA: /* Link partner ability reg */
4695                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4696                      LPA_100BASE4 | LPA_LPACK;
4697                 break;
4698         case MII_EXPANSION: /* Expansion register */
4699                 break;
4700         case MII_DCOUNTER: /* disconnect counter */
4701                 break;
4702         case MII_FCSCOUNTER: /* false carrier counter */
4703                 break;
4704         case MII_NWAYTEST: /* N-way auto-neg test register */
4705                 break;
4706         case MII_RERRCOUNTER: /* rx error counter */
4707                 rc = card->stats.rx_length_errors +
4708                      card->stats.rx_frame_errors +
4709                      card->stats.rx_fifo_errors;
4710                 break;
4711         case MII_SREVISION: /* silicon revision */
4712                 break;
4713         case MII_RESV1: /* reserved 1 */
4714                 break;
4715         case MII_LBRERROR: /* loopback, rx, bypass error */
4716                 break;
4717         case MII_PHYADDR: /* physical address */
4718                 break;
4719         case MII_RESV2: /* reserved 2 */
4720                 break;
4721         case MII_TPISTATUS: /* TPI status for 10mbps */
4722                 break;
4723         case MII_NCONFIG: /* network interface config */
4724                 break;
4725         default:
4726                 break;
4727         }
4728         return rc;
4729 }
4730
4731 static int qeth_snmp_command_cb(struct qeth_card *card,
4732                                 struct qeth_reply *reply, unsigned long data)
4733 {
4734         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4735         struct qeth_arp_query_info *qinfo = reply->param;
4736         struct qeth_ipacmd_setadpparms *adp_cmd;
4737         unsigned int data_len;
4738         void *snmp_data;
4739
4740         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4741
4742         if (cmd->hdr.return_code) {
4743                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4744                 return -EIO;
4745         }
4746         if (cmd->data.setadapterparms.hdr.return_code) {
4747                 cmd->hdr.return_code =
4748                         cmd->data.setadapterparms.hdr.return_code;
4749                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4750                 return -EIO;
4751         }
4752
4753         adp_cmd = &cmd->data.setadapterparms;
4754         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4755         if (adp_cmd->hdr.seq_no == 1) {
4756                 snmp_data = &adp_cmd->data.snmp;
4757         } else {
4758                 snmp_data = &adp_cmd->data.snmp.request;
4759                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4760         }
4761
4762         /* check if there is enough room in userspace */
4763         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4764                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4765                 return -ENOSPC;
4766         }
4767         QETH_CARD_TEXT_(card, 4, "snore%i",
4768                         cmd->data.setadapterparms.hdr.used_total);
4769         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4770                         cmd->data.setadapterparms.hdr.seq_no);
4771         /*copy entries to user buffer*/
4772         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4773         qinfo->udata_offset += data_len;
4774
4775         if (cmd->data.setadapterparms.hdr.seq_no <
4776             cmd->data.setadapterparms.hdr.used_total)
4777                 return 1;
4778         return 0;
4779 }
4780
4781 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4782 {
4783         struct qeth_snmp_ureq __user *ureq;
4784         struct qeth_cmd_buffer *iob;
4785         unsigned int req_len;
4786         struct qeth_arp_query_info qinfo = {0, };
4787         int rc = 0;
4788
4789         QETH_CARD_TEXT(card, 3, "snmpcmd");
4790
4791         if (IS_VM_NIC(card))
4792                 return -EOPNOTSUPP;
4793
4794         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4795             IS_LAYER3(card))
4796                 return -EOPNOTSUPP;
4797
4798         ureq = (struct qeth_snmp_ureq __user *) udata;
4799         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4800             get_user(req_len, &ureq->hdr.req_len))
4801                 return -EFAULT;
4802
4803         /* Sanitize user input, to avoid overflows in iob size calculation: */
4804         if (req_len > QETH_BUFSIZE)
4805                 return -EINVAL;
4806
4807         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4808         if (!iob)
4809                 return -ENOMEM;
4810
4811         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4812                            &ureq->cmd, req_len)) {
4813                 qeth_put_cmd(iob);
4814                 return -EFAULT;
4815         }
4816
4817         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4818         if (!qinfo.udata) {
4819                 qeth_put_cmd(iob);
4820                 return -ENOMEM;
4821         }
4822         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4823
4824         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4825         if (rc)
4826                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4827                                  CARD_DEVID(card), rc);
4828         else {
4829                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4830                         rc = -EFAULT;
4831         }
4832
4833         kfree(qinfo.udata);
4834         return rc;
4835 }
4836
4837 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4838                                          struct qeth_reply *reply,
4839                                          unsigned long data)
4840 {
4841         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4842         struct qeth_qoat_priv *priv = reply->param;
4843         int resdatalen;
4844
4845         QETH_CARD_TEXT(card, 3, "qoatcb");
4846         if (qeth_setadpparms_inspect_rc(cmd))
4847                 return -EIO;
4848
4849         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4850
4851         if (resdatalen > (priv->buffer_len - priv->response_len))
4852                 return -ENOSPC;
4853
4854         memcpy(priv->buffer + priv->response_len,
4855                &cmd->data.setadapterparms.hdr, resdatalen);
4856         priv->response_len += resdatalen;
4857
4858         if (cmd->data.setadapterparms.hdr.seq_no <
4859             cmd->data.setadapterparms.hdr.used_total)
4860                 return 1;
4861         return 0;
4862 }
4863
4864 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4865 {
4866         int rc = 0;
4867         struct qeth_cmd_buffer *iob;
4868         struct qeth_ipa_cmd *cmd;
4869         struct qeth_query_oat *oat_req;
4870         struct qeth_query_oat_data oat_data;
4871         struct qeth_qoat_priv priv;
4872         void __user *tmp;
4873
4874         QETH_CARD_TEXT(card, 3, "qoatcmd");
4875
4876         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4877                 return -EOPNOTSUPP;
4878
4879         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4880                 return -EFAULT;
4881
4882         priv.buffer_len = oat_data.buffer_len;
4883         priv.response_len = 0;
4884         priv.buffer = vzalloc(oat_data.buffer_len);
4885         if (!priv.buffer)
4886                 return -ENOMEM;
4887
4888         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4889                                    SETADP_DATA_SIZEOF(query_oat));
4890         if (!iob) {
4891                 rc = -ENOMEM;
4892                 goto out_free;
4893         }
4894         cmd = __ipa_cmd(iob);
4895         oat_req = &cmd->data.setadapterparms.data.query_oat;
4896         oat_req->subcmd_code = oat_data.command;
4897
4898         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4899         if (!rc) {
4900                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4901                                          u64_to_user_ptr(oat_data.ptr);
4902                 oat_data.response_len = priv.response_len;
4903
4904                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4905                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4906                         rc = -EFAULT;
4907         }
4908
4909 out_free:
4910         vfree(priv.buffer);
4911         return rc;
4912 }
4913
4914 static int qeth_query_card_info_cb(struct qeth_card *card,
4915                                    struct qeth_reply *reply, unsigned long data)
4916 {
4917         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4918         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4919         struct qeth_query_card_info *card_info;
4920
4921         QETH_CARD_TEXT(card, 2, "qcrdincb");
4922         if (qeth_setadpparms_inspect_rc(cmd))
4923                 return -EIO;
4924
4925         card_info = &cmd->data.setadapterparms.data.card_info;
4926         carrier_info->card_type = card_info->card_type;
4927         carrier_info->port_mode = card_info->port_mode;
4928         carrier_info->port_speed = card_info->port_speed;
4929         return 0;
4930 }
4931
4932 int qeth_query_card_info(struct qeth_card *card,
4933                          struct carrier_info *carrier_info)
4934 {
4935         struct qeth_cmd_buffer *iob;
4936
4937         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4938         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4939                 return -EOPNOTSUPP;
4940         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4941         if (!iob)
4942                 return -ENOMEM;
4943         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4944                                         (void *)carrier_info);
4945 }
4946
4947 /**
4948  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4949  * @card: pointer to a qeth_card
4950  *
4951  * Returns
4952  *      0, if a MAC address has been set for the card's netdevice
4953  *      a return code, for various error conditions
4954  */
4955 int qeth_vm_request_mac(struct qeth_card *card)
4956 {
4957         struct diag26c_mac_resp *response;
4958         struct diag26c_mac_req *request;
4959         struct ccw_dev_id id;
4960         int rc;
4961
4962         QETH_CARD_TEXT(card, 2, "vmreqmac");
4963
4964         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4965         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4966         if (!request || !response) {
4967                 rc = -ENOMEM;
4968                 goto out;
4969         }
4970
4971         ccw_device_get_id(CARD_DDEV(card), &id);
4972         request->resp_buf_len = sizeof(*response);
4973         request->resp_version = DIAG26C_VERSION2;
4974         request->op_code = DIAG26C_GET_MAC;
4975         request->devno = id.devno;
4976
4977         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4978         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4979         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4980         if (rc)
4981                 goto out;
4982         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4983
4984         if (request->resp_buf_len < sizeof(*response) ||
4985             response->version != request->resp_version) {
4986                 rc = -EIO;
4987                 QETH_CARD_TEXT(card, 2, "badresp");
4988                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4989                               sizeof(request->resp_buf_len));
4990         } else if (!is_valid_ether_addr(response->mac)) {
4991                 rc = -EINVAL;
4992                 QETH_CARD_TEXT(card, 2, "badmac");
4993                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4994         } else {
4995                 ether_addr_copy(card->dev->dev_addr, response->mac);
4996         }
4997
4998 out:
4999         kfree(response);
5000         kfree(request);
5001         return rc;
5002 }
5003 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5004
5005 static void qeth_determine_capabilities(struct qeth_card *card)
5006 {
5007         struct qeth_channel *channel = &card->data;
5008         struct ccw_device *ddev = channel->ccwdev;
5009         int rc;
5010         int ddev_offline = 0;
5011
5012         QETH_CARD_TEXT(card, 2, "detcapab");
5013         if (!ddev->online) {
5014                 ddev_offline = 1;
5015                 rc = qeth_start_channel(channel);
5016                 if (rc) {
5017                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5018                         goto out;
5019                 }
5020         }
5021
5022         rc = qeth_read_conf_data(card);
5023         if (rc) {
5024                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5025                                  CARD_DEVID(card), rc);
5026                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5027                 goto out_offline;
5028         }
5029
5030         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5031         if (rc)
5032                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5033
5034         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5035         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5036         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5037         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5038         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5039         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5040             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5041             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5042                 dev_info(&card->gdev->dev,
5043                         "Completion Queueing supported\n");
5044         } else {
5045                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5046         }
5047
5048
5049 out_offline:
5050         if (ddev_offline == 1)
5051                 qeth_stop_channel(channel);
5052 out:
5053         return;
5054 }
5055
5056 static int qeth_qdio_establish(struct qeth_card *card)
5057 {
5058         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5059         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5060         struct qdio_initialize init_data;
5061         char *qib_param_field;
5062         unsigned int i;
5063         int rc = 0;
5064
5065         QETH_CARD_TEXT(card, 2, "qdioest");
5066
5067         qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5068         if (!qib_param_field) {
5069                 rc =  -ENOMEM;
5070                 goto out_free_nothing;
5071         }
5072
5073         qeth_create_qib_param_field(card, qib_param_field);
5074         qeth_create_qib_param_field_blkt(card, qib_param_field);
5075
5076         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5077         if (card->options.cq == QETH_CQ_ENABLED)
5078                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5079
5080         for (i = 0; i < card->qdio.no_out_queues; i++)
5081                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5082
5083         memset(&init_data, 0, sizeof(struct qdio_initialize));
5084         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5085                                                           QDIO_QETH_QFMT;
5086         init_data.qib_param_field_format = 0;
5087         init_data.qib_param_field        = qib_param_field;
5088         init_data.no_input_qs            = card->qdio.no_in_queues;
5089         init_data.no_output_qs           = card->qdio.no_out_queues;
5090         init_data.input_handler          = qeth_qdio_input_handler;
5091         init_data.output_handler         = qeth_qdio_output_handler;
5092         init_data.irq_poll               = qeth_qdio_poll;
5093         init_data.int_parm               = (unsigned long) card;
5094         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5095         init_data.output_sbal_addr_array = out_sbal_ptrs;
5096         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5097         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5098
5099         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5100                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5101                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5102                                    init_data.no_output_qs);
5103                 if (rc) {
5104                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5105                         goto out;
5106                 }
5107                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5108                 if (rc) {
5109                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5110                         qdio_free(CARD_DDEV(card));
5111                 }
5112         }
5113
5114         switch (card->options.cq) {
5115         case QETH_CQ_ENABLED:
5116                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5117                 break;
5118         case QETH_CQ_DISABLED:
5119                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5120                 break;
5121         default:
5122                 break;
5123         }
5124 out:
5125         kfree(qib_param_field);
5126 out_free_nothing:
5127         return rc;
5128 }
5129
5130 static void qeth_core_free_card(struct qeth_card *card)
5131 {
5132         QETH_CARD_TEXT(card, 2, "freecrd");
5133
5134         unregister_service_level(&card->qeth_service_level);
5135         debugfs_remove_recursive(card->debugfs);
5136         qeth_put_cmd(card->read_cmd);
5137         destroy_workqueue(card->event_wq);
5138         dev_set_drvdata(&card->gdev->dev, NULL);
5139         kfree(card);
5140 }
5141
5142 void qeth_trace_features(struct qeth_card *card)
5143 {
5144         QETH_CARD_TEXT(card, 2, "features");
5145         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5146         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5147         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5148         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5149                       sizeof(card->info.diagass_support));
5150 }
5151 EXPORT_SYMBOL_GPL(qeth_trace_features);
5152
5153 static struct ccw_device_id qeth_ids[] = {
5154         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5155                                         .driver_info = QETH_CARD_TYPE_OSD},
5156         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5157                                         .driver_info = QETH_CARD_TYPE_IQD},
5158 #ifdef CONFIG_QETH_OSN
5159         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5160                                         .driver_info = QETH_CARD_TYPE_OSN},
5161 #endif
5162         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5163                                         .driver_info = QETH_CARD_TYPE_OSM},
5164 #ifdef CONFIG_QETH_OSX
5165         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5166                                         .driver_info = QETH_CARD_TYPE_OSX},
5167 #endif
5168         {},
5169 };
5170 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5171
5172 static struct ccw_driver qeth_ccw_driver = {
5173         .driver = {
5174                 .owner = THIS_MODULE,
5175                 .name = "qeth",
5176         },
5177         .ids = qeth_ids,
5178         .probe = ccwgroup_probe_ccwdev,
5179         .remove = ccwgroup_remove_ccwdev,
5180 };
5181
5182 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5183 {
5184         int retries = 3;
5185         int rc;
5186
5187         QETH_CARD_TEXT(card, 2, "hrdsetup");
5188         atomic_set(&card->force_alloc_skb, 0);
5189         rc = qeth_update_from_chp_desc(card);
5190         if (rc)
5191                 return rc;
5192 retry:
5193         if (retries < 3)
5194                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5195                                  CARD_DEVID(card));
5196         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5197         qeth_stop_channel(&card->data);
5198         qeth_stop_channel(&card->write);
5199         qeth_stop_channel(&card->read);
5200         qdio_free(CARD_DDEV(card));
5201
5202         rc = qeth_start_channel(&card->read);
5203         if (rc)
5204                 goto retriable;
5205         rc = qeth_start_channel(&card->write);
5206         if (rc)
5207                 goto retriable;
5208         rc = qeth_start_channel(&card->data);
5209         if (rc)
5210                 goto retriable;
5211 retriable:
5212         if (rc == -ERESTARTSYS) {
5213                 QETH_CARD_TEXT(card, 2, "break1");
5214                 return rc;
5215         } else if (rc) {
5216                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5217                 if (--retries < 0)
5218                         goto out;
5219                 else
5220                         goto retry;
5221         }
5222
5223         qeth_determine_capabilities(card);
5224         qeth_idx_init(card);
5225
5226         rc = qeth_idx_activate_read_channel(card);
5227         if (rc == -EINTR) {
5228                 QETH_CARD_TEXT(card, 2, "break2");
5229                 return rc;
5230         } else if (rc) {
5231                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5232                 if (--retries < 0)
5233                         goto out;
5234                 else
5235                         goto retry;
5236         }
5237
5238         rc = qeth_idx_activate_write_channel(card);
5239         if (rc == -EINTR) {
5240                 QETH_CARD_TEXT(card, 2, "break3");
5241                 return rc;
5242         } else if (rc) {
5243                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5244                 if (--retries < 0)
5245                         goto out;
5246                 else
5247                         goto retry;
5248         }
5249         card->read_or_write_problem = 0;
5250         rc = qeth_mpc_initialize(card);
5251         if (rc) {
5252                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5253                 goto out;
5254         }
5255
5256         rc = qeth_send_startlan(card);
5257         if (rc) {
5258                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5259                 if (rc == -ENETDOWN) {
5260                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5261                         *carrier_ok = false;
5262                 } else {
5263                         goto out;
5264                 }
5265         } else {
5266                 *carrier_ok = true;
5267         }
5268
5269         card->options.ipa4.supported = 0;
5270         card->options.ipa6.supported = 0;
5271         card->options.adp.supported = 0;
5272         card->options.sbp.supported_funcs = 0;
5273         card->info.diagass_support = 0;
5274         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5275         if (rc == -ENOMEM)
5276                 goto out;
5277         if (qeth_is_supported(card, IPA_IPV6)) {
5278                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5279                 if (rc == -ENOMEM)
5280                         goto out;
5281         }
5282         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5283                 rc = qeth_query_setadapterparms(card);
5284                 if (rc < 0) {
5285                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5286                         goto out;
5287                 }
5288         }
5289         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5290                 rc = qeth_query_setdiagass(card);
5291                 if (rc)
5292                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5293         }
5294
5295         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5296             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5297                 card->info.hwtrap = 0;
5298
5299         if (card->options.isolation != ISOLATION_MODE_NONE) {
5300                 rc = qeth_setadpparms_set_access_ctrl(card,
5301                                                       card->options.isolation);
5302                 if (rc)
5303                         goto out;
5304         }
5305
5306         rc = qeth_init_qdio_queues(card);
5307         if (rc) {
5308                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5309                 goto out;
5310         }
5311
5312         return 0;
5313 out:
5314         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5315                 "an error on the device\n");
5316         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5317                          CARD_DEVID(card), rc);
5318         return rc;
5319 }
5320 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5321
5322 static int qeth_set_online(struct qeth_card *card)
5323 {
5324         int rc;
5325
5326         mutex_lock(&card->discipline_mutex);
5327         mutex_lock(&card->conf_mutex);
5328         QETH_CARD_TEXT(card, 2, "setonlin");
5329
5330         rc = card->discipline->set_online(card);
5331
5332         mutex_unlock(&card->conf_mutex);
5333         mutex_unlock(&card->discipline_mutex);
5334
5335         return rc;
5336 }
5337
5338 int qeth_set_offline(struct qeth_card *card, bool resetting)
5339 {
5340         int rc, rc2, rc3;
5341
5342         mutex_lock(&card->discipline_mutex);
5343         mutex_lock(&card->conf_mutex);
5344         QETH_CARD_TEXT(card, 3, "setoffl");
5345
5346         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5347                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5348                 card->info.hwtrap = 1;
5349         }
5350
5351         rtnl_lock();
5352         card->info.open_when_online = card->dev->flags & IFF_UP;
5353         dev_close(card->dev);
5354         netif_device_detach(card->dev);
5355         netif_carrier_off(card->dev);
5356         rtnl_unlock();
5357
5358         card->discipline->set_offline(card);
5359
5360         rc  = qeth_stop_channel(&card->data);
5361         rc2 = qeth_stop_channel(&card->write);
5362         rc3 = qeth_stop_channel(&card->read);
5363         if (!rc)
5364                 rc = (rc2) ? rc2 : rc3;
5365         if (rc)
5366                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5367         qdio_free(CARD_DDEV(card));
5368
5369         /* let user_space know that device is offline */
5370         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5371
5372         mutex_unlock(&card->conf_mutex);
5373         mutex_unlock(&card->discipline_mutex);
5374         return 0;
5375 }
5376 EXPORT_SYMBOL_GPL(qeth_set_offline);
5377
5378 static int qeth_do_reset(void *data)
5379 {
5380         struct qeth_card *card = data;
5381         int rc;
5382
5383         QETH_CARD_TEXT(card, 2, "recover1");
5384         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5385                 return 0;
5386         QETH_CARD_TEXT(card, 2, "recover2");
5387         dev_warn(&card->gdev->dev,
5388                  "A recovery process has been started for the device\n");
5389
5390         qeth_set_offline(card, true);
5391         rc = qeth_set_online(card);
5392         if (!rc) {
5393                 dev_info(&card->gdev->dev,
5394                          "Device successfully recovered!\n");
5395         } else {
5396                 ccwgroup_set_offline(card->gdev);
5397                 dev_warn(&card->gdev->dev,
5398                          "The qeth device driver failed to recover an error on the device\n");
5399         }
5400         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5401         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5402         return 0;
5403 }
5404
5405 #if IS_ENABLED(CONFIG_QETH_L3)
5406 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5407                                 struct qeth_hdr *hdr)
5408 {
5409         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5410         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5411         struct net_device *dev = skb->dev;
5412
5413         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5414                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5415                                 "FAKELL", skb->len);
5416                 return;
5417         }
5418
5419         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5420                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5421                                                              ETH_P_IP;
5422                 unsigned char tg_addr[ETH_ALEN];
5423
5424                 skb_reset_network_header(skb);
5425                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5426                 case QETH_CAST_MULTICAST:
5427                         if (prot == ETH_P_IP)
5428                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5429                         else
5430                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5431                         QETH_CARD_STAT_INC(card, rx_multicast);
5432                         break;
5433                 case QETH_CAST_BROADCAST:
5434                         ether_addr_copy(tg_addr, dev->broadcast);
5435                         QETH_CARD_STAT_INC(card, rx_multicast);
5436                         break;
5437                 default:
5438                         if (card->options.sniffer)
5439                                 skb->pkt_type = PACKET_OTHERHOST;
5440                         ether_addr_copy(tg_addr, dev->dev_addr);
5441                 }
5442
5443                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5444                         dev_hard_header(skb, dev, prot, tg_addr,
5445                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5446                 else
5447                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5448                                         skb->len);
5449         }
5450
5451         /* copy VLAN tag from hdr into skb */
5452         if (!card->options.sniffer &&
5453             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5454                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5455                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5456                                 l3_hdr->vlan_id :
5457                                 l3_hdr->next_hop.rx.vlan_id;
5458
5459                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5460         }
5461 }
5462 #endif
5463
5464 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5465                              struct qeth_hdr *hdr, bool uses_frags)
5466 {
5467         struct napi_struct *napi = &card->napi;
5468         bool is_cso;
5469
5470         switch (hdr->hdr.l2.id) {
5471         case QETH_HEADER_TYPE_OSN:
5472                 skb_push(skb, sizeof(*hdr));
5473                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5474                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5475                 QETH_CARD_STAT_INC(card, rx_packets);
5476
5477                 card->osn_info.data_cb(skb);
5478                 return;
5479 #if IS_ENABLED(CONFIG_QETH_L3)
5480         case QETH_HEADER_TYPE_LAYER3:
5481                 qeth_l3_rebuild_skb(card, skb, hdr);
5482                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5483                 break;
5484 #endif
5485         case QETH_HEADER_TYPE_LAYER2:
5486                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5487                 break;
5488         default:
5489                 /* never happens */
5490                 if (uses_frags)
5491                         napi_free_frags(napi);
5492                 else
5493                         dev_kfree_skb_any(skb);
5494                 return;
5495         }
5496
5497         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5498                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5499                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5500         } else {
5501                 skb->ip_summed = CHECKSUM_NONE;
5502         }
5503
5504         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5505         QETH_CARD_STAT_INC(card, rx_packets);
5506         if (skb_is_nonlinear(skb)) {
5507                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5508                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5509                                    skb_shinfo(skb)->nr_frags);
5510         }
5511
5512         if (uses_frags) {
5513                 napi_gro_frags(napi);
5514         } else {
5515                 skb->protocol = eth_type_trans(skb, skb->dev);
5516                 napi_gro_receive(napi, skb);
5517         }
5518 }
5519
5520 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5521 {
5522         struct page *page = virt_to_page(data);
5523         unsigned int next_frag;
5524
5525         next_frag = skb_shinfo(skb)->nr_frags;
5526         get_page(page);
5527         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5528                         data_len);
5529 }
5530
5531 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5532 {
5533         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5534 }
5535
5536 static int qeth_extract_skb(struct qeth_card *card,
5537                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5538                             int *__offset)
5539 {
5540         struct qeth_priv *priv = netdev_priv(card->dev);
5541         struct qdio_buffer *buffer = qethbuffer->buffer;
5542         struct napi_struct *napi = &card->napi;
5543         struct qdio_buffer_element *element;
5544         unsigned int linear_len = 0;
5545         bool uses_frags = false;
5546         int offset = *__offset;
5547         bool use_rx_sg = false;
5548         unsigned int headroom;
5549         struct qeth_hdr *hdr;
5550         struct sk_buff *skb;
5551         int skb_len = 0;
5552
5553         element = &buffer->element[*element_no];
5554
5555 next_packet:
5556         /* qeth_hdr must not cross element boundaries */
5557         while (element->length < offset + sizeof(struct qeth_hdr)) {
5558                 if (qeth_is_last_sbale(element))
5559                         return -ENODATA;
5560                 element++;
5561                 offset = 0;
5562         }
5563
5564         hdr = phys_to_virt(element->addr) + offset;
5565         offset += sizeof(*hdr);
5566         skb = NULL;
5567
5568         switch (hdr->hdr.l2.id) {
5569         case QETH_HEADER_TYPE_LAYER2:
5570                 skb_len = hdr->hdr.l2.pkt_length;
5571                 linear_len = ETH_HLEN;
5572                 headroom = 0;
5573                 break;
5574         case QETH_HEADER_TYPE_LAYER3:
5575                 skb_len = hdr->hdr.l3.length;
5576                 if (!IS_LAYER3(card)) {
5577                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5578                         goto walk_packet;
5579                 }
5580
5581                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5582                         linear_len = ETH_HLEN;
5583                         headroom = 0;
5584                         break;
5585                 }
5586
5587                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5588                         linear_len = sizeof(struct ipv6hdr);
5589                 else
5590                         linear_len = sizeof(struct iphdr);
5591                 headroom = ETH_HLEN;
5592                 break;
5593         case QETH_HEADER_TYPE_OSN:
5594                 skb_len = hdr->hdr.osn.pdu_length;
5595                 if (!IS_OSN(card)) {
5596                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5597                         goto walk_packet;
5598                 }
5599
5600                 linear_len = skb_len;
5601                 headroom = sizeof(struct qeth_hdr);
5602                 break;
5603         default:
5604                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5605                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5606                 else
5607                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5608
5609                 /* Can't determine packet length, drop the whole buffer. */
5610                 return -EPROTONOSUPPORT;
5611         }
5612
5613         if (skb_len < linear_len) {
5614                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5615                 goto walk_packet;
5616         }
5617
5618         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5619                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5620                      !atomic_read(&card->force_alloc_skb) &&
5621                      !IS_OSN(card));
5622
5623         if (use_rx_sg) {
5624                 /* QETH_CQ_ENABLED only: */
5625                 if (qethbuffer->rx_skb &&
5626                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5627                         skb = qethbuffer->rx_skb;
5628                         qethbuffer->rx_skb = NULL;
5629                         goto use_skb;
5630                 }
5631
5632                 skb = napi_get_frags(napi);
5633                 if (!skb) {
5634                         /* -ENOMEM, no point in falling back further. */
5635                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5636                         goto walk_packet;
5637                 }
5638
5639                 if (skb_tailroom(skb) >= linear_len + headroom) {
5640                         uses_frags = true;
5641                         goto use_skb;
5642                 }
5643
5644                 netdev_info_once(card->dev,
5645                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5646                                  linear_len + headroom, skb_tailroom(skb));
5647                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5648         }
5649
5650         linear_len = skb_len;
5651         skb = napi_alloc_skb(napi, linear_len + headroom);
5652         if (!skb) {
5653                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5654                 goto walk_packet;
5655         }
5656
5657 use_skb:
5658         if (headroom)
5659                 skb_reserve(skb, headroom);
5660 walk_packet:
5661         while (skb_len) {
5662                 int data_len = min(skb_len, (int)(element->length - offset));
5663                 char *data = phys_to_virt(element->addr) + offset;
5664
5665                 skb_len -= data_len;
5666                 offset += data_len;
5667
5668                 /* Extract data from current element: */
5669                 if (skb && data_len) {
5670                         if (linear_len) {
5671                                 unsigned int copy_len;
5672
5673                                 copy_len = min_t(unsigned int, linear_len,
5674                                                  data_len);
5675
5676                                 skb_put_data(skb, data, copy_len);
5677                                 linear_len -= copy_len;
5678                                 data_len -= copy_len;
5679                                 data += copy_len;
5680                         }
5681
5682                         if (data_len)
5683                                 qeth_create_skb_frag(skb, data, data_len);
5684                 }
5685
5686                 /* Step forward to next element: */
5687                 if (skb_len) {
5688                         if (qeth_is_last_sbale(element)) {
5689                                 QETH_CARD_TEXT(card, 4, "unexeob");
5690                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5691                                 if (skb) {
5692                                         if (uses_frags)
5693                                                 napi_free_frags(napi);
5694                                         else
5695                                                 dev_kfree_skb_any(skb);
5696                                         QETH_CARD_STAT_INC(card,
5697                                                            rx_length_errors);
5698                                 }
5699                                 return -EMSGSIZE;
5700                         }
5701                         element++;
5702                         offset = 0;
5703                 }
5704         }
5705
5706         /* This packet was skipped, go get another one: */
5707         if (!skb)
5708                 goto next_packet;
5709
5710         *element_no = element - &buffer->element[0];
5711         *__offset = offset;
5712
5713         qeth_receive_skb(card, skb, hdr, uses_frags);
5714         return 0;
5715 }
5716
5717 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5718                                       struct qeth_qdio_buffer *buf, bool *done)
5719 {
5720         unsigned int work_done = 0;
5721
5722         while (budget) {
5723                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5724                                      &card->rx.e_offset)) {
5725                         *done = true;
5726                         break;
5727                 }
5728
5729                 work_done++;
5730                 budget--;
5731         }
5732
5733         return work_done;
5734 }
5735
5736 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5737 {
5738         struct qeth_rx *ctx = &card->rx;
5739         unsigned int work_done = 0;
5740
5741         while (budget > 0) {
5742                 struct qeth_qdio_buffer *buffer;
5743                 unsigned int skbs_done = 0;
5744                 bool done = false;
5745
5746                 /* Fetch completed RX buffers: */
5747                 if (!card->rx.b_count) {
5748                         card->rx.qdio_err = 0;
5749                         card->rx.b_count = qdio_get_next_buffers(
5750                                 card->data.ccwdev, 0, &card->rx.b_index,
5751                                 &card->rx.qdio_err);
5752                         if (card->rx.b_count <= 0) {
5753                                 card->rx.b_count = 0;
5754                                 break;
5755                         }
5756                 }
5757
5758                 /* Process one completed RX buffer: */
5759                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5760                 if (!(card->rx.qdio_err &&
5761                       qeth_check_qdio_errors(card, buffer->buffer,
5762                                              card->rx.qdio_err, "qinerr")))
5763                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5764                                                       &done);
5765                 else
5766                         done = true;
5767
5768                 work_done += skbs_done;
5769                 budget -= skbs_done;
5770
5771                 if (done) {
5772                         QETH_CARD_STAT_INC(card, rx_bufs);
5773                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5774                         buffer->pool_entry = NULL;
5775                         card->rx.b_count--;
5776                         ctx->bufs_refill++;
5777                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5778                                                                  ctx->bufs_refill);
5779
5780                         /* Step forward to next buffer: */
5781                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5782                         card->rx.buf_element = 0;
5783                         card->rx.e_offset = 0;
5784                 }
5785         }
5786
5787         return work_done;
5788 }
5789
5790 static void qeth_cq_poll(struct qeth_card *card)
5791 {
5792         unsigned int work_done = 0;
5793
5794         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5795                 unsigned int start, error;
5796                 int completed;
5797
5798                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5799                                                &error);
5800                 if (completed <= 0)
5801                         return;
5802
5803                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5804                 work_done += completed;
5805         }
5806 }
5807
5808 int qeth_poll(struct napi_struct *napi, int budget)
5809 {
5810         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5811         unsigned int work_done;
5812
5813         work_done = qeth_rx_poll(card, budget);
5814
5815         if (card->options.cq == QETH_CQ_ENABLED)
5816                 qeth_cq_poll(card);
5817
5818         if (budget) {
5819                 struct qeth_rx *ctx = &card->rx;
5820
5821                 /* Process any substantial refill backlog: */
5822                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5823
5824                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5825                 if (work_done >= budget)
5826                         return work_done;
5827         }
5828
5829         if (napi_complete_done(napi, work_done) &&
5830             qdio_start_irq(CARD_DDEV(card)))
5831                 napi_schedule(napi);
5832
5833         return work_done;
5834 }
5835 EXPORT_SYMBOL_GPL(qeth_poll);
5836
5837 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5838                                  unsigned int bidx, bool error, int budget)
5839 {
5840         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5841         u8 sflags = buffer->buffer->element[15].sflags;
5842         struct qeth_card *card = queue->card;
5843
5844         if (queue->bufstates && (queue->bufstates[bidx].flags &
5845                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5846                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5847
5848                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5849                                                    QETH_QDIO_BUF_PENDING) ==
5850                     QETH_QDIO_BUF_PRIMED)
5851                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5852
5853                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5854
5855                 /* prepare the queue slot for re-use: */
5856                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5857                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5858                         QETH_CARD_TEXT(card, 2, "outofbuf");
5859                         qeth_schedule_recovery(card);
5860                 }
5861
5862                 return;
5863         }
5864
5865         if (card->options.cq == QETH_CQ_ENABLED)
5866                 qeth_notify_skbs(queue, buffer,
5867                                  qeth_compute_cq_notification(sflags, 0));
5868         qeth_clear_output_buffer(queue, buffer, error, budget);
5869 }
5870
5871 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5872 {
5873         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5874         unsigned int queue_no = queue->queue_no;
5875         struct qeth_card *card = queue->card;
5876         struct net_device *dev = card->dev;
5877         unsigned int work_done = 0;
5878         struct netdev_queue *txq;
5879
5880         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5881
5882         while (1) {
5883                 unsigned int start, error, i;
5884                 unsigned int packets = 0;
5885                 unsigned int bytes = 0;
5886                 int completed;
5887
5888                 if (qeth_out_queue_is_empty(queue)) {
5889                         napi_complete(napi);
5890                         return 0;
5891                 }
5892
5893                 /* Give the CPU a breather: */
5894                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5895                         QETH_TXQ_STAT_INC(queue, completion_yield);
5896                         if (napi_complete_done(napi, 0))
5897                                 napi_schedule(napi);
5898                         return 0;
5899                 }
5900
5901                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5902                                                &start, &error);
5903                 if (completed <= 0) {
5904                         /* Ensure we see TX completion for pending work: */
5905                         if (napi_complete_done(napi, 0))
5906                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5907                         return 0;
5908                 }
5909
5910                 for (i = start; i < start + completed; i++) {
5911                         struct qeth_qdio_out_buffer *buffer;
5912                         unsigned int bidx = QDIO_BUFNR(i);
5913
5914                         buffer = queue->bufs[bidx];
5915                         packets += buffer->frames;
5916                         bytes += buffer->bytes;
5917
5918                         qeth_handle_send_error(card, buffer, error);
5919                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5920                         qeth_cleanup_handled_pending(queue, bidx, false);
5921                 }
5922
5923                 netdev_tx_completed_queue(txq, packets, bytes);
5924                 atomic_sub(completed, &queue->used_buffers);
5925                 work_done += completed;
5926
5927                 /* xmit may have observed the full-condition, but not yet
5928                  * stopped the txq. In which case the code below won't trigger.
5929                  * So before returning, xmit will re-check the txq's fill level
5930                  * and wake it up if needed.
5931                  */
5932                 if (netif_tx_queue_stopped(txq) &&
5933                     !qeth_out_queue_is_full(queue))
5934                         netif_tx_wake_queue(txq);
5935         }
5936 }
5937
5938 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5939 {
5940         if (!cmd->hdr.return_code)
5941                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5942         return cmd->hdr.return_code;
5943 }
5944
5945 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5946                                         struct qeth_reply *reply,
5947                                         unsigned long data)
5948 {
5949         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5950         struct qeth_ipa_caps *caps = reply->param;
5951
5952         if (qeth_setassparms_inspect_rc(cmd))
5953                 return -EIO;
5954
5955         caps->supported = cmd->data.setassparms.data.caps.supported;
5956         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5957         return 0;
5958 }
5959
5960 int qeth_setassparms_cb(struct qeth_card *card,
5961                         struct qeth_reply *reply, unsigned long data)
5962 {
5963         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5964
5965         QETH_CARD_TEXT(card, 4, "defadpcb");
5966
5967         if (cmd->hdr.return_code)
5968                 return -EIO;
5969
5970         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5971         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5972                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
5973         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5974                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
5975         return 0;
5976 }
5977 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5978
5979 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5980                                                  enum qeth_ipa_funcs ipa_func,
5981                                                  u16 cmd_code,
5982                                                  unsigned int data_length,
5983                                                  enum qeth_prot_versions prot)
5984 {
5985         struct qeth_ipacmd_setassparms *setassparms;
5986         struct qeth_ipacmd_setassparms_hdr *hdr;
5987         struct qeth_cmd_buffer *iob;
5988
5989         QETH_CARD_TEXT(card, 4, "getasscm");
5990         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5991                                  data_length +
5992                                  offsetof(struct qeth_ipacmd_setassparms,
5993                                           data));
5994         if (!iob)
5995                 return NULL;
5996
5997         setassparms = &__ipa_cmd(iob)->data.setassparms;
5998         setassparms->assist_no = ipa_func;
5999
6000         hdr = &setassparms->hdr;
6001         hdr->length = sizeof(*hdr) + data_length;
6002         hdr->command_code = cmd_code;
6003         return iob;
6004 }
6005 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6006
6007 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6008                                       enum qeth_ipa_funcs ipa_func,
6009                                       u16 cmd_code, u32 *data,
6010                                       enum qeth_prot_versions prot)
6011 {
6012         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6013         struct qeth_cmd_buffer *iob;
6014
6015         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6016         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6017         if (!iob)
6018                 return -ENOMEM;
6019
6020         if (data)
6021                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6022         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6023 }
6024 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6025
6026 static void qeth_unregister_dbf_views(void)
6027 {
6028         int x;
6029         for (x = 0; x < QETH_DBF_INFOS; x++) {
6030                 debug_unregister(qeth_dbf[x].id);
6031                 qeth_dbf[x].id = NULL;
6032         }
6033 }
6034
6035 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6036 {
6037         char dbf_txt_buf[32];
6038         va_list args;
6039
6040         if (!debug_level_enabled(id, level))
6041                 return;
6042         va_start(args, fmt);
6043         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6044         va_end(args);
6045         debug_text_event(id, level, dbf_txt_buf);
6046 }
6047 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6048
6049 static int qeth_register_dbf_views(void)
6050 {
6051         int ret;
6052         int x;
6053
6054         for (x = 0; x < QETH_DBF_INFOS; x++) {
6055                 /* register the areas */
6056                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6057                                                 qeth_dbf[x].pages,
6058                                                 qeth_dbf[x].areas,
6059                                                 qeth_dbf[x].len);
6060                 if (qeth_dbf[x].id == NULL) {
6061                         qeth_unregister_dbf_views();
6062                         return -ENOMEM;
6063                 }
6064
6065                 /* register a view */
6066                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6067                 if (ret) {
6068                         qeth_unregister_dbf_views();
6069                         return ret;
6070                 }
6071
6072                 /* set a passing level */
6073                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6074         }
6075
6076         return 0;
6077 }
6078
6079 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6080
6081 int qeth_core_load_discipline(struct qeth_card *card,
6082                 enum qeth_discipline_id discipline)
6083 {
6084         mutex_lock(&qeth_mod_mutex);
6085         switch (discipline) {
6086         case QETH_DISCIPLINE_LAYER3:
6087                 card->discipline = try_then_request_module(
6088                         symbol_get(qeth_l3_discipline), "qeth_l3");
6089                 break;
6090         case QETH_DISCIPLINE_LAYER2:
6091                 card->discipline = try_then_request_module(
6092                         symbol_get(qeth_l2_discipline), "qeth_l2");
6093                 break;
6094         default:
6095                 break;
6096         }
6097         mutex_unlock(&qeth_mod_mutex);
6098
6099         if (!card->discipline) {
6100                 dev_err(&card->gdev->dev, "There is no kernel module to "
6101                         "support discipline %d\n", discipline);
6102                 return -EINVAL;
6103         }
6104
6105         card->options.layer = discipline;
6106         return 0;
6107 }
6108
6109 void qeth_core_free_discipline(struct qeth_card *card)
6110 {
6111         if (IS_LAYER2(card))
6112                 symbol_put(qeth_l2_discipline);
6113         else
6114                 symbol_put(qeth_l3_discipline);
6115         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6116         card->discipline = NULL;
6117 }
6118
6119 const struct device_type qeth_generic_devtype = {
6120         .name = "qeth_generic",
6121         .groups = qeth_generic_attr_groups,
6122 };
6123 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6124
6125 static const struct device_type qeth_osn_devtype = {
6126         .name = "qeth_osn",
6127         .groups = qeth_osn_attr_groups,
6128 };
6129
6130 #define DBF_NAME_LEN    20
6131
6132 struct qeth_dbf_entry {
6133         char dbf_name[DBF_NAME_LEN];
6134         debug_info_t *dbf_info;
6135         struct list_head dbf_list;
6136 };
6137
6138 static LIST_HEAD(qeth_dbf_list);
6139 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6140
6141 static debug_info_t *qeth_get_dbf_entry(char *name)
6142 {
6143         struct qeth_dbf_entry *entry;
6144         debug_info_t *rc = NULL;
6145
6146         mutex_lock(&qeth_dbf_list_mutex);
6147         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6148                 if (strcmp(entry->dbf_name, name) == 0) {
6149                         rc = entry->dbf_info;
6150                         break;
6151                 }
6152         }
6153         mutex_unlock(&qeth_dbf_list_mutex);
6154         return rc;
6155 }
6156
6157 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6158 {
6159         struct qeth_dbf_entry *new_entry;
6160
6161         card->debug = debug_register(name, 2, 1, 8);
6162         if (!card->debug) {
6163                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6164                 goto err;
6165         }
6166         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6167                 goto err_dbg;
6168         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6169         if (!new_entry)
6170                 goto err_dbg;
6171         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6172         new_entry->dbf_info = card->debug;
6173         mutex_lock(&qeth_dbf_list_mutex);
6174         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6175         mutex_unlock(&qeth_dbf_list_mutex);
6176
6177         return 0;
6178
6179 err_dbg:
6180         debug_unregister(card->debug);
6181 err:
6182         return -ENOMEM;
6183 }
6184
6185 static void qeth_clear_dbf_list(void)
6186 {
6187         struct qeth_dbf_entry *entry, *tmp;
6188
6189         mutex_lock(&qeth_dbf_list_mutex);
6190         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6191                 list_del(&entry->dbf_list);
6192                 debug_unregister(entry->dbf_info);
6193                 kfree(entry);
6194         }
6195         mutex_unlock(&qeth_dbf_list_mutex);
6196 }
6197
6198 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6199 {
6200         struct net_device *dev;
6201         struct qeth_priv *priv;
6202
6203         switch (card->info.type) {
6204         case QETH_CARD_TYPE_IQD:
6205                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6206                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6207                 break;
6208         case QETH_CARD_TYPE_OSM:
6209                 dev = alloc_etherdev(sizeof(*priv));
6210                 break;
6211         case QETH_CARD_TYPE_OSN:
6212                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6213                                    ether_setup);
6214                 break;
6215         default:
6216                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6217         }
6218
6219         if (!dev)
6220                 return NULL;
6221
6222         priv = netdev_priv(dev);
6223         priv->rx_copybreak = QETH_RX_COPYBREAK;
6224
6225         dev->ml_priv = card;
6226         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6227         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6228          /* initialized when device first goes online: */
6229         dev->max_mtu = 0;
6230         dev->mtu = 0;
6231         SET_NETDEV_DEV(dev, &card->gdev->dev);
6232         netif_carrier_off(dev);
6233
6234         dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
6235                                           &qeth_ethtool_ops;
6236
6237         return dev;
6238 }
6239
6240 struct net_device *qeth_clone_netdev(struct net_device *orig)
6241 {
6242         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6243
6244         if (!clone)
6245                 return NULL;
6246
6247         clone->dev_port = orig->dev_port;
6248         return clone;
6249 }
6250
6251 int qeth_setup_netdev(struct qeth_card *card)
6252 {
6253         struct net_device *dev = card->dev;
6254         unsigned int num_tx_queues;
6255
6256         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6257         dev->hw_features |= NETIF_F_SG;
6258         dev->vlan_features |= NETIF_F_SG;
6259
6260         if (IS_IQD(card)) {
6261                 dev->features |= NETIF_F_SG;
6262                 num_tx_queues = QETH_IQD_MIN_TXQ;
6263         } else if (IS_VM_NIC(card)) {
6264                 num_tx_queues = 1;
6265         } else {
6266                 num_tx_queues = dev->real_num_tx_queues;
6267         }
6268
6269         return qeth_set_real_num_tx_queues(card, num_tx_queues);
6270 }
6271 EXPORT_SYMBOL_GPL(qeth_setup_netdev);
6272
6273 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6274 {
6275         struct qeth_card *card;
6276         struct device *dev;
6277         int rc;
6278         enum qeth_discipline_id enforced_disc;
6279         char dbf_name[DBF_NAME_LEN];
6280
6281         QETH_DBF_TEXT(SETUP, 2, "probedev");
6282
6283         dev = &gdev->dev;
6284         if (!get_device(dev))
6285                 return -ENODEV;
6286
6287         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6288
6289         card = qeth_alloc_card(gdev);
6290         if (!card) {
6291                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6292                 rc = -ENOMEM;
6293                 goto err_dev;
6294         }
6295
6296         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6297                 dev_name(&gdev->dev));
6298         card->debug = qeth_get_dbf_entry(dbf_name);
6299         if (!card->debug) {
6300                 rc = qeth_add_dbf_entry(card, dbf_name);
6301                 if (rc)
6302                         goto err_card;
6303         }
6304
6305         qeth_setup_card(card);
6306         card->dev = qeth_alloc_netdev(card);
6307         if (!card->dev) {
6308                 rc = -ENOMEM;
6309                 goto err_card;
6310         }
6311
6312         qeth_determine_capabilities(card);
6313         qeth_set_blkt_defaults(card);
6314
6315         card->qdio.no_out_queues = card->dev->num_tx_queues;
6316         rc = qeth_update_from_chp_desc(card);
6317         if (rc)
6318                 goto err_chp_desc;
6319
6320         enforced_disc = qeth_enforce_discipline(card);
6321         switch (enforced_disc) {
6322         case QETH_DISCIPLINE_UNDETERMINED:
6323                 gdev->dev.type = &qeth_generic_devtype;
6324                 break;
6325         default:
6326                 card->info.layer_enforced = true;
6327                 rc = qeth_core_load_discipline(card, enforced_disc);
6328                 if (rc)
6329                         goto err_load;
6330
6331                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6332                                                 card->discipline->devtype;
6333                 rc = card->discipline->setup(card->gdev);
6334                 if (rc)
6335                         goto err_disc;
6336                 break;
6337         }
6338
6339         return 0;
6340
6341 err_disc:
6342         qeth_core_free_discipline(card);
6343 err_load:
6344 err_chp_desc:
6345         free_netdev(card->dev);
6346 err_card:
6347         qeth_core_free_card(card);
6348 err_dev:
6349         put_device(dev);
6350         return rc;
6351 }
6352
6353 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6354 {
6355         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6356
6357         QETH_CARD_TEXT(card, 2, "removedv");
6358
6359         if (card->discipline) {
6360                 card->discipline->remove(gdev);
6361                 qeth_core_free_discipline(card);
6362         }
6363
6364         qeth_free_qdio_queues(card);
6365
6366         free_netdev(card->dev);
6367         qeth_core_free_card(card);
6368         put_device(&gdev->dev);
6369 }
6370
6371 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6372 {
6373         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6374         int rc = 0;
6375         enum qeth_discipline_id def_discipline;
6376
6377         if (!card->discipline) {
6378                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6379                                                 QETH_DISCIPLINE_LAYER2;
6380                 rc = qeth_core_load_discipline(card, def_discipline);
6381                 if (rc)
6382                         goto err;
6383                 rc = card->discipline->setup(card->gdev);
6384                 if (rc) {
6385                         qeth_core_free_discipline(card);
6386                         goto err;
6387                 }
6388         }
6389
6390         rc = qeth_set_online(card);
6391 err:
6392         return rc;
6393 }
6394
6395 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6396 {
6397         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6398
6399         return qeth_set_offline(card, false);
6400 }
6401
6402 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6403 {
6404         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6405         qeth_set_allowed_threads(card, 0, 1);
6406         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6407                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6408         qeth_qdio_clear_card(card, 0);
6409         qeth_drain_output_queues(card);
6410         qdio_free(CARD_DDEV(card));
6411 }
6412
6413 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6414                            size_t count)
6415 {
6416         int err;
6417
6418         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6419                                   buf);
6420
6421         return err ? err : count;
6422 }
6423 static DRIVER_ATTR_WO(group);
6424
6425 static struct attribute *qeth_drv_attrs[] = {
6426         &driver_attr_group.attr,
6427         NULL,
6428 };
6429 static struct attribute_group qeth_drv_attr_group = {
6430         .attrs = qeth_drv_attrs,
6431 };
6432 static const struct attribute_group *qeth_drv_attr_groups[] = {
6433         &qeth_drv_attr_group,
6434         NULL,
6435 };
6436
6437 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6438         .driver = {
6439                 .groups = qeth_drv_attr_groups,
6440                 .owner = THIS_MODULE,
6441                 .name = "qeth",
6442         },
6443         .ccw_driver = &qeth_ccw_driver,
6444         .setup = qeth_core_probe_device,
6445         .remove = qeth_core_remove_device,
6446         .set_online = qeth_core_set_online,
6447         .set_offline = qeth_core_set_offline,
6448         .shutdown = qeth_core_shutdown,
6449 };
6450
6451 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6452 {
6453         struct ccwgroup_device *gdev;
6454         struct qeth_card *card;
6455
6456         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6457         if (!gdev)
6458                 return NULL;
6459
6460         card = dev_get_drvdata(&gdev->dev);
6461         put_device(&gdev->dev);
6462         return card;
6463 }
6464 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6465
6466 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6467 {
6468         struct qeth_card *card = dev->ml_priv;
6469         struct mii_ioctl_data *mii_data;
6470         int rc = 0;
6471
6472         switch (cmd) {
6473         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6474                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6475                 break;
6476         case SIOC_QETH_GET_CARD_TYPE:
6477                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6478                     !IS_VM_NIC(card))
6479                         return 1;
6480                 return 0;
6481         case SIOCGMIIPHY:
6482                 mii_data = if_mii(rq);
6483                 mii_data->phy_id = 0;
6484                 break;
6485         case SIOCGMIIREG:
6486                 mii_data = if_mii(rq);
6487                 if (mii_data->phy_id != 0)
6488                         rc = -EINVAL;
6489                 else
6490                         mii_data->val_out = qeth_mdio_read(dev,
6491                                 mii_data->phy_id, mii_data->reg_num);
6492                 break;
6493         case SIOC_QETH_QUERY_OAT:
6494                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6495                 break;
6496         default:
6497                 if (card->discipline->do_ioctl)
6498                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6499                 else
6500                         rc = -EOPNOTSUPP;
6501         }
6502         if (rc)
6503                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6504         return rc;
6505 }
6506 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6507
6508 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6509                               unsigned long data)
6510 {
6511         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6512         u32 *features = reply->param;
6513
6514         if (qeth_setassparms_inspect_rc(cmd))
6515                 return -EIO;
6516
6517         *features = cmd->data.setassparms.data.flags_32bit;
6518         return 0;
6519 }
6520
6521 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6522                              enum qeth_prot_versions prot)
6523 {
6524         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6525                                                  NULL, prot);
6526 }
6527
6528 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6529                             enum qeth_prot_versions prot, u8 *lp2lp)
6530 {
6531         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6532         struct qeth_cmd_buffer *iob;
6533         struct qeth_ipa_caps caps;
6534         u32 features;
6535         int rc;
6536
6537         /* some L3 HW requires combined L3+L4 csum offload: */
6538         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6539             cstype == IPA_OUTBOUND_CHECKSUM)
6540                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6541
6542         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6543                                        prot);
6544         if (!iob)
6545                 return -ENOMEM;
6546
6547         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6548         if (rc)
6549                 return rc;
6550
6551         if ((required_features & features) != required_features) {
6552                 qeth_set_csum_off(card, cstype, prot);
6553                 return -EOPNOTSUPP;
6554         }
6555
6556         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6557                                        SETASS_DATA_SIZEOF(flags_32bit),
6558                                        prot);
6559         if (!iob) {
6560                 qeth_set_csum_off(card, cstype, prot);
6561                 return -ENOMEM;
6562         }
6563
6564         if (features & QETH_IPA_CHECKSUM_LP2LP)
6565                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6566         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6567         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6568         if (rc) {
6569                 qeth_set_csum_off(card, cstype, prot);
6570                 return rc;
6571         }
6572
6573         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6574             !qeth_ipa_caps_enabled(&caps, required_features)) {
6575                 qeth_set_csum_off(card, cstype, prot);
6576                 return -EOPNOTSUPP;
6577         }
6578
6579         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6580                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6581
6582         if (lp2lp)
6583                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6584
6585         return 0;
6586 }
6587
6588 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6589                              enum qeth_prot_versions prot, u8 *lp2lp)
6590 {
6591         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6592                     qeth_set_csum_off(card, cstype, prot);
6593 }
6594
6595 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6596                              unsigned long data)
6597 {
6598         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6599         struct qeth_tso_start_data *tso_data = reply->param;
6600
6601         if (qeth_setassparms_inspect_rc(cmd))
6602                 return -EIO;
6603
6604         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6605         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6606         return 0;
6607 }
6608
6609 static int qeth_set_tso_off(struct qeth_card *card,
6610                             enum qeth_prot_versions prot)
6611 {
6612         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6613                                                  IPA_CMD_ASS_STOP, NULL, prot);
6614 }
6615
6616 static int qeth_set_tso_on(struct qeth_card *card,
6617                            enum qeth_prot_versions prot)
6618 {
6619         struct qeth_tso_start_data tso_data;
6620         struct qeth_cmd_buffer *iob;
6621         struct qeth_ipa_caps caps;
6622         int rc;
6623
6624         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6625                                        IPA_CMD_ASS_START, 0, prot);
6626         if (!iob)
6627                 return -ENOMEM;
6628
6629         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6630         if (rc)
6631                 return rc;
6632
6633         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6634                 qeth_set_tso_off(card, prot);
6635                 return -EOPNOTSUPP;
6636         }
6637
6638         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6639                                        IPA_CMD_ASS_ENABLE,
6640                                        SETASS_DATA_SIZEOF(caps), prot);
6641         if (!iob) {
6642                 qeth_set_tso_off(card, prot);
6643                 return -ENOMEM;
6644         }
6645
6646         /* enable TSO capability */
6647         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6648                 QETH_IPA_LARGE_SEND_TCP;
6649         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6650         if (rc) {
6651                 qeth_set_tso_off(card, prot);
6652                 return rc;
6653         }
6654
6655         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6656             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6657                 qeth_set_tso_off(card, prot);
6658                 return -EOPNOTSUPP;
6659         }
6660
6661         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6662                  tso_data.mss);
6663         return 0;
6664 }
6665
6666 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6667                             enum qeth_prot_versions prot)
6668 {
6669         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6670 }
6671
6672 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6673 {
6674         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6675         int rc_ipv6;
6676
6677         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6678                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6679                                             QETH_PROT_IPV4, NULL);
6680         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6681                 /* no/one Offload Assist available, so the rc is trivial */
6682                 return rc_ipv4;
6683
6684         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6685                                     QETH_PROT_IPV6, NULL);
6686
6687         if (on)
6688                 /* enable: success if any Assist is active */
6689                 return (rc_ipv6) ? rc_ipv4 : 0;
6690
6691         /* disable: failure if any Assist is still active */
6692         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6693 }
6694
6695 /**
6696  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6697  * @dev:        a net_device
6698  */
6699 void qeth_enable_hw_features(struct net_device *dev)
6700 {
6701         struct qeth_card *card = dev->ml_priv;
6702         netdev_features_t features;
6703
6704         features = dev->features;
6705         /* force-off any feature that might need an IPA sequence.
6706          * netdev_update_features() will restart them.
6707          */
6708         dev->features &= ~dev->hw_features;
6709         /* toggle VLAN filter, so that VIDs are re-programmed: */
6710         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6711                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6712                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6713         }
6714         netdev_update_features(dev);
6715         if (features != dev->features)
6716                 dev_warn(&card->gdev->dev,
6717                          "Device recovery failed to restore all offload features\n");
6718 }
6719 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6720
6721 static void qeth_check_restricted_features(struct qeth_card *card,
6722                                            netdev_features_t changed,
6723                                            netdev_features_t actual)
6724 {
6725         netdev_features_t ipv6_features = NETIF_F_TSO6;
6726         netdev_features_t ipv4_features = NETIF_F_TSO;
6727
6728         if (!card->info.has_lp2lp_cso_v6)
6729                 ipv6_features |= NETIF_F_IPV6_CSUM;
6730         if (!card->info.has_lp2lp_cso_v4)
6731                 ipv4_features |= NETIF_F_IP_CSUM;
6732
6733         if ((changed & ipv6_features) && !(actual & ipv6_features))
6734                 qeth_flush_local_addrs6(card);
6735         if ((changed & ipv4_features) && !(actual & ipv4_features))
6736                 qeth_flush_local_addrs4(card);
6737 }
6738
6739 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6740 {
6741         struct qeth_card *card = dev->ml_priv;
6742         netdev_features_t changed = dev->features ^ features;
6743         int rc = 0;
6744
6745         QETH_CARD_TEXT(card, 2, "setfeat");
6746         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6747
6748         if ((changed & NETIF_F_IP_CSUM)) {
6749                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6750                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6751                                        &card->info.has_lp2lp_cso_v4);
6752                 if (rc)
6753                         changed ^= NETIF_F_IP_CSUM;
6754         }
6755         if (changed & NETIF_F_IPV6_CSUM) {
6756                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6757                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6758                                        &card->info.has_lp2lp_cso_v6);
6759                 if (rc)
6760                         changed ^= NETIF_F_IPV6_CSUM;
6761         }
6762         if (changed & NETIF_F_RXCSUM) {
6763                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6764                 if (rc)
6765                         changed ^= NETIF_F_RXCSUM;
6766         }
6767         if (changed & NETIF_F_TSO) {
6768                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6769                                       QETH_PROT_IPV4);
6770                 if (rc)
6771                         changed ^= NETIF_F_TSO;
6772         }
6773         if (changed & NETIF_F_TSO6) {
6774                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6775                                       QETH_PROT_IPV6);
6776                 if (rc)
6777                         changed ^= NETIF_F_TSO6;
6778         }
6779
6780         qeth_check_restricted_features(card, dev->features ^ features,
6781                                        dev->features ^ changed);
6782
6783         /* everything changed successfully? */
6784         if ((dev->features ^ features) == changed)
6785                 return 0;
6786         /* something went wrong. save changed features and return error */
6787         dev->features ^= changed;
6788         return -EIO;
6789 }
6790 EXPORT_SYMBOL_GPL(qeth_set_features);
6791
6792 netdev_features_t qeth_fix_features(struct net_device *dev,
6793                                     netdev_features_t features)
6794 {
6795         struct qeth_card *card = dev->ml_priv;
6796
6797         QETH_CARD_TEXT(card, 2, "fixfeat");
6798         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6799                 features &= ~NETIF_F_IP_CSUM;
6800         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6801                 features &= ~NETIF_F_IPV6_CSUM;
6802         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6803             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6804                 features &= ~NETIF_F_RXCSUM;
6805         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6806                 features &= ~NETIF_F_TSO;
6807         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6808                 features &= ~NETIF_F_TSO6;
6809
6810         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6811         return features;
6812 }
6813 EXPORT_SYMBOL_GPL(qeth_fix_features);
6814
6815 netdev_features_t qeth_features_check(struct sk_buff *skb,
6816                                       struct net_device *dev,
6817                                       netdev_features_t features)
6818 {
6819         struct qeth_card *card = dev->ml_priv;
6820
6821         /* Traffic with local next-hop is not eligible for some offloads: */
6822         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6823             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6824                 netdev_features_t restricted = 0;
6825
6826                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6827                         restricted |= NETIF_F_ALL_TSO;
6828
6829                 switch (vlan_get_protocol(skb)) {
6830                 case htons(ETH_P_IP):
6831                         if (!card->info.has_lp2lp_cso_v4)
6832                                 restricted |= NETIF_F_IP_CSUM;
6833
6834                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6835                                 features &= ~restricted;
6836                         break;
6837                 case htons(ETH_P_IPV6):
6838                         if (!card->info.has_lp2lp_cso_v6)
6839                                 restricted |= NETIF_F_IPV6_CSUM;
6840
6841                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6842                                 features &= ~restricted;
6843                         break;
6844                 default:
6845                         break;
6846                 }
6847         }
6848
6849         /* GSO segmentation builds skbs with
6850          *      a (small) linear part for the headers, and
6851          *      page frags for the data.
6852          * Compared to a linear skb, the header-only part consumes an
6853          * additional buffer element. This reduces buffer utilization, and
6854          * hurts throughput. So compress small segments into one element.
6855          */
6856         if (netif_needs_gso(skb, features)) {
6857                 /* match skb_segment(): */
6858                 unsigned int doffset = skb->data - skb_mac_header(skb);
6859                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6860                 unsigned int hroom = skb_headroom(skb);
6861
6862                 /* linearize only if resulting skb allocations are order-0: */
6863                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6864                         features &= ~NETIF_F_SG;
6865         }
6866
6867         return vlan_features_check(skb, features);
6868 }
6869 EXPORT_SYMBOL_GPL(qeth_features_check);
6870
6871 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6872 {
6873         struct qeth_card *card = dev->ml_priv;
6874         struct qeth_qdio_out_q *queue;
6875         unsigned int i;
6876
6877         QETH_CARD_TEXT(card, 5, "getstat");
6878
6879         stats->rx_packets = card->stats.rx_packets;
6880         stats->rx_bytes = card->stats.rx_bytes;
6881         stats->rx_errors = card->stats.rx_length_errors +
6882                            card->stats.rx_frame_errors +
6883                            card->stats.rx_fifo_errors;
6884         stats->rx_dropped = card->stats.rx_dropped_nomem +
6885                             card->stats.rx_dropped_notsupp +
6886                             card->stats.rx_dropped_runt;
6887         stats->multicast = card->stats.rx_multicast;
6888         stats->rx_length_errors = card->stats.rx_length_errors;
6889         stats->rx_frame_errors = card->stats.rx_frame_errors;
6890         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6891
6892         for (i = 0; i < card->qdio.no_out_queues; i++) {
6893                 queue = card->qdio.out_qs[i];
6894
6895                 stats->tx_packets += queue->stats.tx_packets;
6896                 stats->tx_bytes += queue->stats.tx_bytes;
6897                 stats->tx_errors += queue->stats.tx_errors;
6898                 stats->tx_dropped += queue->stats.tx_dropped;
6899         }
6900 }
6901 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6902
6903 #define TC_IQD_UCAST   0
6904 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6905                                      unsigned int ucast_txqs)
6906 {
6907         unsigned int prio;
6908
6909         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6910          * qeth_iqd_select_queue() deals with this.
6911          * For unicast traffic, we defer the queue selection to the stack.
6912          * By installing a trivial prio map that spans over only the unicast
6913          * queues, we can encourage the stack to spread the ucast traffic evenly
6914          * without selecting the mcast queue.
6915          */
6916
6917         /* One traffic class, spanning over all active ucast queues: */
6918         netdev_set_num_tc(dev, 1);
6919         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6920                             QETH_IQD_MIN_UCAST_TXQ);
6921
6922         /* Map all priorities to this traffic class: */
6923         for (prio = 0; prio <= TC_BITMASK; prio++)
6924                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6925 }
6926
6927 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6928 {
6929         struct net_device *dev = card->dev;
6930         int rc;
6931
6932         /* Per netif_setup_tc(), adjust the mapping first: */
6933         if (IS_IQD(card))
6934                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6935
6936         rc = netif_set_real_num_tx_queues(dev, count);
6937
6938         if (rc && IS_IQD(card))
6939                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6940
6941         return rc;
6942 }
6943
6944 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6945                           u8 cast_type, struct net_device *sb_dev)
6946 {
6947         u16 txq;
6948
6949         if (cast_type != RTN_UNICAST)
6950                 return QETH_IQD_MCAST_TXQ;
6951         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6952                 return QETH_IQD_MIN_UCAST_TXQ;
6953
6954         txq = netdev_pick_tx(dev, skb, sb_dev);
6955         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6956 }
6957 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6958
6959 int qeth_open(struct net_device *dev)
6960 {
6961         struct qeth_card *card = dev->ml_priv;
6962
6963         QETH_CARD_TEXT(card, 4, "qethopen");
6964
6965         card->data.state = CH_STATE_UP;
6966         netif_tx_start_all_queues(dev);
6967
6968         napi_enable(&card->napi);
6969         local_bh_disable();
6970         napi_schedule(&card->napi);
6971         if (IS_IQD(card)) {
6972                 struct qeth_qdio_out_q *queue;
6973                 unsigned int i;
6974
6975                 qeth_for_each_output_queue(card, queue, i) {
6976                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6977                                           QETH_NAPI_WEIGHT);
6978                         napi_enable(&queue->napi);
6979                         napi_schedule(&queue->napi);
6980                 }
6981         }
6982         /* kick-start the NAPI softirq: */
6983         local_bh_enable();
6984         return 0;
6985 }
6986 EXPORT_SYMBOL_GPL(qeth_open);
6987
6988 int qeth_stop(struct net_device *dev)
6989 {
6990         struct qeth_card *card = dev->ml_priv;
6991
6992         QETH_CARD_TEXT(card, 4, "qethstop");
6993         if (IS_IQD(card)) {
6994                 struct qeth_qdio_out_q *queue;
6995                 unsigned int i;
6996
6997                 /* Quiesce the NAPI instances: */
6998                 qeth_for_each_output_queue(card, queue, i)
6999                         napi_disable(&queue->napi);
7000
7001                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7002                 netif_tx_disable(dev);
7003
7004                 qeth_for_each_output_queue(card, queue, i) {
7005                         del_timer_sync(&queue->timer);
7006                         /* Queues may get re-allocated, so remove the NAPIs. */
7007                         netif_napi_del(&queue->napi);
7008                 }
7009         } else {
7010                 netif_tx_disable(dev);
7011         }
7012
7013         napi_disable(&card->napi);
7014         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7015         qdio_stop_irq(CARD_DDEV(card));
7016
7017         return 0;
7018 }
7019 EXPORT_SYMBOL_GPL(qeth_stop);
7020
7021 static int __init qeth_core_init(void)
7022 {
7023         int rc;
7024
7025         pr_info("loading core functions\n");
7026
7027         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7028
7029         rc = qeth_register_dbf_views();
7030         if (rc)
7031                 goto dbf_err;
7032         qeth_core_root_dev = root_device_register("qeth");
7033         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7034         if (rc)
7035                 goto register_err;
7036         qeth_core_header_cache =
7037                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7038                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7039                                   0, NULL);
7040         if (!qeth_core_header_cache) {
7041                 rc = -ENOMEM;
7042                 goto slab_err;
7043         }
7044         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7045                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7046         if (!qeth_qdio_outbuf_cache) {
7047                 rc = -ENOMEM;
7048                 goto cqslab_err;
7049         }
7050         rc = ccw_driver_register(&qeth_ccw_driver);
7051         if (rc)
7052                 goto ccw_err;
7053         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7054         if (rc)
7055                 goto ccwgroup_err;
7056
7057         return 0;
7058
7059 ccwgroup_err:
7060         ccw_driver_unregister(&qeth_ccw_driver);
7061 ccw_err:
7062         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7063 cqslab_err:
7064         kmem_cache_destroy(qeth_core_header_cache);
7065 slab_err:
7066         root_device_unregister(qeth_core_root_dev);
7067 register_err:
7068         qeth_unregister_dbf_views();
7069 dbf_err:
7070         debugfs_remove_recursive(qeth_debugfs_root);
7071         pr_err("Initializing the qeth device driver failed\n");
7072         return rc;
7073 }
7074
7075 static void __exit qeth_core_exit(void)
7076 {
7077         qeth_clear_dbf_list();
7078         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7079         ccw_driver_unregister(&qeth_ccw_driver);
7080         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7081         kmem_cache_destroy(qeth_core_header_cache);
7082         root_device_unregister(qeth_core_root_dev);
7083         qeth_unregister_dbf_views();
7084         debugfs_remove_recursive(qeth_debugfs_root);
7085         pr_info("core functions removed\n");
7086 }
7087
7088 module_init(qeth_core_init);
7089 module_exit(qeth_core_exit);
7090 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7091 MODULE_DESCRIPTION("qeth core functions");
7092 MODULE_LICENSE("GPL");