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 i;
3026         int rc;
3027
3028         QETH_CARD_TEXT(card, 2, "initqdqs");
3029
3030         /* inbound queue */
3031         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3032         memset(&card->rx, 0, sizeof(struct qeth_rx));
3033
3034         qeth_initialize_working_pool_list(card);
3035         /*give only as many buffers to hardware as we have buffer pool entries*/
3036         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) {
3037                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3038                 if (rc)
3039                         return rc;
3040         }
3041
3042         card->qdio.in_q->next_buf_to_init =
3043                 card->qdio.in_buf_pool.buf_count - 1;
3044         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
3045                      card->qdio.in_buf_pool.buf_count - 1);
3046         if (rc) {
3047                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3048                 return rc;
3049         }
3050
3051         /* completion */
3052         rc = qeth_cq_init(card);
3053         if (rc) {
3054                 return rc;
3055         }
3056
3057         /* outbound queue */
3058         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3059                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3060
3061                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3062                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3063                 queue->next_buf_to_fill = 0;
3064                 queue->do_pack = 0;
3065                 queue->prev_hdr = NULL;
3066                 queue->coalesced_frames = 0;
3067                 queue->bulk_start = 0;
3068                 queue->bulk_count = 0;
3069                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3070                 atomic_set(&queue->used_buffers, 0);
3071                 atomic_set(&queue->set_pci_flags_count, 0);
3072                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3073                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3074         }
3075         return 0;
3076 }
3077
3078 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3079                                   struct qeth_cmd_buffer *iob)
3080 {
3081         qeth_mpc_finalize_cmd(card, iob);
3082
3083         /* override with IPA-specific values: */
3084         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3085 }
3086
3087 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3088                           u16 cmd_length,
3089                           bool (*match)(struct qeth_cmd_buffer *iob,
3090                                         struct qeth_cmd_buffer *reply))
3091 {
3092         u8 prot_type = qeth_mpc_select_prot_type(card);
3093         u16 total_length = iob->length;
3094
3095         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3096                        iob->data);
3097         iob->finalize = qeth_ipa_finalize_cmd;
3098         iob->match = match;
3099
3100         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3101         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3102         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3103         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3104         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3105         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3106                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3107         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3108 }
3109 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3110
3111 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3112                                  struct qeth_cmd_buffer *reply)
3113 {
3114         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3115
3116         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3117 }
3118
3119 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3120                                            enum qeth_ipa_cmds cmd_code,
3121                                            enum qeth_prot_versions prot,
3122                                            unsigned int data_length)
3123 {
3124         struct qeth_cmd_buffer *iob;
3125         struct qeth_ipacmd_hdr *hdr;
3126
3127         data_length += offsetof(struct qeth_ipa_cmd, data);
3128         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3129                              QETH_IPA_TIMEOUT);
3130         if (!iob)
3131                 return NULL;
3132
3133         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3134
3135         hdr = &__ipa_cmd(iob)->hdr;
3136         hdr->command = cmd_code;
3137         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3138         /* hdr->seqno is set by qeth_send_control_data() */
3139         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3140         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3141         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3142         hdr->param_count = 1;
3143         hdr->prot_version = prot;
3144         return iob;
3145 }
3146 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3147
3148 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3149                                 struct qeth_reply *reply, unsigned long data)
3150 {
3151         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3152
3153         return (cmd->hdr.return_code) ? -EIO : 0;
3154 }
3155
3156 /**
3157  * qeth_send_ipa_cmd() - send an IPA command
3158  *
3159  * See qeth_send_control_data() for explanation of the arguments.
3160  */
3161
3162 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3163                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3164                         unsigned long),
3165                 void *reply_param)
3166 {
3167         int rc;
3168
3169         QETH_CARD_TEXT(card, 4, "sendipa");
3170
3171         if (card->read_or_write_problem) {
3172                 qeth_put_cmd(iob);
3173                 return -EIO;
3174         }
3175
3176         if (reply_cb == NULL)
3177                 reply_cb = qeth_send_ipa_cmd_cb;
3178         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3179         if (rc == -ETIME) {
3180                 qeth_clear_ipacmd_list(card);
3181                 qeth_schedule_recovery(card);
3182         }
3183         return rc;
3184 }
3185 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3186
3187 static int qeth_send_startlan_cb(struct qeth_card *card,
3188                                  struct qeth_reply *reply, unsigned long data)
3189 {
3190         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3191
3192         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3193                 return -ENETDOWN;
3194
3195         return (cmd->hdr.return_code) ? -EIO : 0;
3196 }
3197
3198 static int qeth_send_startlan(struct qeth_card *card)
3199 {
3200         struct qeth_cmd_buffer *iob;
3201
3202         QETH_CARD_TEXT(card, 2, "strtlan");
3203
3204         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3205         if (!iob)
3206                 return -ENOMEM;
3207         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3208 }
3209
3210 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3211 {
3212         if (!cmd->hdr.return_code)
3213                 cmd->hdr.return_code =
3214                         cmd->data.setadapterparms.hdr.return_code;
3215         return cmd->hdr.return_code;
3216 }
3217
3218 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3219                 struct qeth_reply *reply, unsigned long data)
3220 {
3221         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3222         struct qeth_query_cmds_supp *query_cmd;
3223
3224         QETH_CARD_TEXT(card, 3, "quyadpcb");
3225         if (qeth_setadpparms_inspect_rc(cmd))
3226                 return -EIO;
3227
3228         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3229         if (query_cmd->lan_type & 0x7f) {
3230                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3231                         return -EPROTONOSUPPORT;
3232
3233                 card->info.link_type = query_cmd->lan_type;
3234                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3235         }
3236
3237         card->options.adp.supported = query_cmd->supported_cmds;
3238         return 0;
3239 }
3240
3241 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3242                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3243                                                     unsigned int data_length)
3244 {
3245         struct qeth_ipacmd_setadpparms_hdr *hdr;
3246         struct qeth_cmd_buffer *iob;
3247
3248         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3249                                  data_length +
3250                                  offsetof(struct qeth_ipacmd_setadpparms,
3251                                           data));
3252         if (!iob)
3253                 return NULL;
3254
3255         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3256         hdr->cmdlength = sizeof(*hdr) + data_length;
3257         hdr->command_code = adp_cmd;
3258         hdr->used_total = 1;
3259         hdr->seq_no = 1;
3260         return iob;
3261 }
3262
3263 static int qeth_query_setadapterparms(struct qeth_card *card)
3264 {
3265         int rc;
3266         struct qeth_cmd_buffer *iob;
3267
3268         QETH_CARD_TEXT(card, 3, "queryadp");
3269         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3270                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3271         if (!iob)
3272                 return -ENOMEM;
3273         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3274         return rc;
3275 }
3276
3277 static int qeth_query_ipassists_cb(struct qeth_card *card,
3278                 struct qeth_reply *reply, unsigned long data)
3279 {
3280         struct qeth_ipa_cmd *cmd;
3281
3282         QETH_CARD_TEXT(card, 2, "qipasscb");
3283
3284         cmd = (struct qeth_ipa_cmd *) data;
3285
3286         switch (cmd->hdr.return_code) {
3287         case IPA_RC_SUCCESS:
3288                 break;
3289         case IPA_RC_NOTSUPP:
3290         case IPA_RC_L2_UNSUPPORTED_CMD:
3291                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3292                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3293                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3294                 return -EOPNOTSUPP;
3295         default:
3296                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3297                                  CARD_DEVID(card), cmd->hdr.return_code);
3298                 return -EIO;
3299         }
3300
3301         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3302                 card->options.ipa4 = cmd->hdr.assists;
3303         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3304                 card->options.ipa6 = cmd->hdr.assists;
3305         else
3306                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3307                                  CARD_DEVID(card));
3308         return 0;
3309 }
3310
3311 static int qeth_query_ipassists(struct qeth_card *card,
3312                                 enum qeth_prot_versions prot)
3313 {
3314         int rc;
3315         struct qeth_cmd_buffer *iob;
3316
3317         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3318         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3319         if (!iob)
3320                 return -ENOMEM;
3321         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3322         return rc;
3323 }
3324
3325 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3326                                 struct qeth_reply *reply, unsigned long data)
3327 {
3328         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3329         struct qeth_query_switch_attributes *attrs;
3330         struct qeth_switch_info *sw_info;
3331
3332         QETH_CARD_TEXT(card, 2, "qswiatcb");
3333         if (qeth_setadpparms_inspect_rc(cmd))
3334                 return -EIO;
3335
3336         sw_info = (struct qeth_switch_info *)reply->param;
3337         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3338         sw_info->capabilities = attrs->capabilities;
3339         sw_info->settings = attrs->settings;
3340         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3341                         sw_info->settings);
3342         return 0;
3343 }
3344
3345 int qeth_query_switch_attributes(struct qeth_card *card,
3346                                  struct qeth_switch_info *sw_info)
3347 {
3348         struct qeth_cmd_buffer *iob;
3349
3350         QETH_CARD_TEXT(card, 2, "qswiattr");
3351         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3352                 return -EOPNOTSUPP;
3353         if (!netif_carrier_ok(card->dev))
3354                 return -ENOMEDIUM;
3355         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3356         if (!iob)
3357                 return -ENOMEM;
3358         return qeth_send_ipa_cmd(card, iob,
3359                                 qeth_query_switch_attributes_cb, sw_info);
3360 }
3361
3362 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3363                                           enum qeth_diags_cmds sub_cmd,
3364                                           unsigned int data_length)
3365 {
3366         struct qeth_ipacmd_diagass *cmd;
3367         struct qeth_cmd_buffer *iob;
3368
3369         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3370                                  DIAG_HDR_LEN + data_length);
3371         if (!iob)
3372                 return NULL;
3373
3374         cmd = &__ipa_cmd(iob)->data.diagass;
3375         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3376         cmd->subcmd = sub_cmd;
3377         return iob;
3378 }
3379 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3380
3381 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3382                 struct qeth_reply *reply, unsigned long data)
3383 {
3384         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3385         u16 rc = cmd->hdr.return_code;
3386
3387         if (rc) {
3388                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3389                 return -EIO;
3390         }
3391
3392         card->info.diagass_support = cmd->data.diagass.ext;
3393         return 0;
3394 }
3395
3396 static int qeth_query_setdiagass(struct qeth_card *card)
3397 {
3398         struct qeth_cmd_buffer *iob;
3399
3400         QETH_CARD_TEXT(card, 2, "qdiagass");
3401         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3402         if (!iob)
3403                 return -ENOMEM;
3404         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3405 }
3406
3407 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3408 {
3409         unsigned long info = get_zeroed_page(GFP_KERNEL);
3410         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3411         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3412         struct ccw_dev_id ccwid;
3413         int level;
3414
3415         tid->chpid = card->info.chpid;
3416         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3417         tid->ssid = ccwid.ssid;
3418         tid->devno = ccwid.devno;
3419         if (!info)
3420                 return;
3421         level = stsi(NULL, 0, 0, 0);
3422         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3423                 tid->lparnr = info222->lpar_number;
3424         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3425                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3426                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3427         }
3428         free_page(info);
3429         return;
3430 }
3431
3432 static int qeth_hw_trap_cb(struct qeth_card *card,
3433                 struct qeth_reply *reply, unsigned long data)
3434 {
3435         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3436         u16 rc = cmd->hdr.return_code;
3437
3438         if (rc) {
3439                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3440                 return -EIO;
3441         }
3442         return 0;
3443 }
3444
3445 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3446 {
3447         struct qeth_cmd_buffer *iob;
3448         struct qeth_ipa_cmd *cmd;
3449
3450         QETH_CARD_TEXT(card, 2, "diagtrap");
3451         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3452         if (!iob)
3453                 return -ENOMEM;
3454         cmd = __ipa_cmd(iob);
3455         cmd->data.diagass.type = 1;
3456         cmd->data.diagass.action = action;
3457         switch (action) {
3458         case QETH_DIAGS_TRAP_ARM:
3459                 cmd->data.diagass.options = 0x0003;
3460                 cmd->data.diagass.ext = 0x00010000 +
3461                         sizeof(struct qeth_trap_id);
3462                 qeth_get_trap_id(card,
3463                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3464                 break;
3465         case QETH_DIAGS_TRAP_DISARM:
3466                 cmd->data.diagass.options = 0x0001;
3467                 break;
3468         case QETH_DIAGS_TRAP_CAPTURE:
3469                 break;
3470         }
3471         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3472 }
3473
3474 static int qeth_check_qdio_errors(struct qeth_card *card,
3475                                   struct qdio_buffer *buf,
3476                                   unsigned int qdio_error,
3477                                   const char *dbftext)
3478 {
3479         if (qdio_error) {
3480                 QETH_CARD_TEXT(card, 2, dbftext);
3481                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3482                                buf->element[15].sflags);
3483                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3484                                buf->element[14].sflags);
3485                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3486                 if ((buf->element[15].sflags) == 0x12) {
3487                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3488                         return 0;
3489                 } else
3490                         return 1;
3491         }
3492         return 0;
3493 }
3494
3495 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3496 {
3497         struct qeth_qdio_q *queue = card->qdio.in_q;
3498         struct list_head *lh;
3499         int count;
3500         int i;
3501         int rc;
3502         int newcount = 0;
3503
3504         count = (index < queue->next_buf_to_init)?
3505                 card->qdio.in_buf_pool.buf_count -
3506                 (queue->next_buf_to_init - index) :
3507                 card->qdio.in_buf_pool.buf_count -
3508                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3509         /* only requeue at a certain threshold to avoid SIGAs */
3510         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3511                 for (i = queue->next_buf_to_init;
3512                      i < queue->next_buf_to_init + count; ++i) {
3513                         if (qeth_init_input_buffer(card,
3514                                 &queue->bufs[QDIO_BUFNR(i)])) {
3515                                 break;
3516                         } else {
3517                                 newcount++;
3518                         }
3519                 }
3520
3521                 if (newcount < count) {
3522                         /* we are in memory shortage so we switch back to
3523                            traditional skb allocation and drop packages */
3524                         atomic_set(&card->force_alloc_skb, 3);
3525                         count = newcount;
3526                 } else {
3527                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3528                 }
3529
3530                 if (!count) {
3531                         i = 0;
3532                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3533                                 i++;
3534                         if (i == card->qdio.in_buf_pool.buf_count) {
3535                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3536                                 card->reclaim_index = index;
3537                                 schedule_delayed_work(
3538                                         &card->buffer_reclaim_work,
3539                                         QETH_RECLAIM_WORK_TIME);
3540                         }
3541                         return;
3542                 }
3543
3544                 /*
3545                  * according to old code it should be avoided to requeue all
3546                  * 128 buffers in order to benefit from PCI avoidance.
3547                  * this function keeps at least one buffer (the buffer at
3548                  * 'index') un-requeued -> this buffer is the first buffer that
3549                  * will be requeued the next time
3550                  */
3551                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3552                              queue->next_buf_to_init, count);
3553                 if (rc) {
3554                         QETH_CARD_TEXT(card, 2, "qinberr");
3555                 }
3556                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3557                                                      count);
3558         }
3559 }
3560
3561 static void qeth_buffer_reclaim_work(struct work_struct *work)
3562 {
3563         struct qeth_card *card = container_of(work, struct qeth_card,
3564                 buffer_reclaim_work.work);
3565
3566         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3567         qeth_queue_input_buffer(card, card->reclaim_index);
3568 }
3569
3570 static void qeth_handle_send_error(struct qeth_card *card,
3571                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3572 {
3573         int sbalf15 = buffer->buffer->element[15].sflags;
3574
3575         QETH_CARD_TEXT(card, 6, "hdsnderr");
3576         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3577
3578         if (!qdio_err)
3579                 return;
3580
3581         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3582                 return;
3583
3584         QETH_CARD_TEXT(card, 1, "lnkfail");
3585         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3586                        (u16)qdio_err, (u8)sbalf15);
3587 }
3588
3589 /**
3590  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3591  * @queue: queue to check for packing buffer
3592  *
3593  * Returns number of buffers that were prepared for flush.
3594  */
3595 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3596 {
3597         struct qeth_qdio_out_buffer *buffer;
3598
3599         buffer = queue->bufs[queue->next_buf_to_fill];
3600         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3601             (buffer->next_element_to_fill > 0)) {
3602                 /* it's a packing buffer */
3603                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3604                 queue->next_buf_to_fill =
3605                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3606                 return 1;
3607         }
3608         return 0;
3609 }
3610
3611 /*
3612  * Switched to packing state if the number of used buffers on a queue
3613  * reaches a certain limit.
3614  */
3615 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3616 {
3617         if (!queue->do_pack) {
3618                 if (atomic_read(&queue->used_buffers)
3619                     >= QETH_HIGH_WATERMARK_PACK){
3620                         /* switch non-PACKING -> PACKING */
3621                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3622                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3623                         queue->do_pack = 1;
3624                 }
3625         }
3626 }
3627
3628 /*
3629  * Switches from packing to non-packing mode. If there is a packing
3630  * buffer on the queue this buffer will be prepared to be flushed.
3631  * In that case 1 is returned to inform the caller. If no buffer
3632  * has to be flushed, zero is returned.
3633  */
3634 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3635 {
3636         if (queue->do_pack) {
3637                 if (atomic_read(&queue->used_buffers)
3638                     <= QETH_LOW_WATERMARK_PACK) {
3639                         /* switch PACKING -> non-PACKING */
3640                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3641                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3642                         queue->do_pack = 0;
3643                         return qeth_prep_flush_pack_buffer(queue);
3644                 }
3645         }
3646         return 0;
3647 }
3648
3649 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3650                                int count)
3651 {
3652         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3653         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3654         struct qeth_card *card = queue->card;
3655         int rc;
3656         int i;
3657
3658         for (i = index; i < index + count; ++i) {
3659                 unsigned int bidx = QDIO_BUFNR(i);
3660                 struct sk_buff *skb;
3661
3662                 buf = queue->bufs[bidx];
3663                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3664                                 SBAL_EFLAGS_LAST_ENTRY;
3665                 queue->coalesced_frames += buf->frames;
3666
3667                 if (queue->bufstates)
3668                         queue->bufstates[bidx].user = buf;
3669
3670                 if (IS_IQD(card)) {
3671                         skb_queue_walk(&buf->skb_list, skb)
3672                                 skb_tx_timestamp(skb);
3673                 }
3674         }
3675
3676         if (!IS_IQD(card)) {
3677                 if (!queue->do_pack) {
3678                         if ((atomic_read(&queue->used_buffers) >=
3679                                 (QETH_HIGH_WATERMARK_PACK -
3680                                  QETH_WATERMARK_PACK_FUZZ)) &&
3681                             !atomic_read(&queue->set_pci_flags_count)) {
3682                                 /* it's likely that we'll go to packing
3683                                  * mode soon */
3684                                 atomic_inc(&queue->set_pci_flags_count);
3685                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3686                         }
3687                 } else {
3688                         if (!atomic_read(&queue->set_pci_flags_count)) {
3689                                 /*
3690                                  * there's no outstanding PCI any more, so we
3691                                  * have to request a PCI to be sure the the PCI
3692                                  * will wake at some time in the future then we
3693                                  * can flush packed buffers that might still be
3694                                  * hanging around, which can happen if no
3695                                  * further send was requested by the stack
3696                                  */
3697                                 atomic_inc(&queue->set_pci_flags_count);
3698                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3699                         }
3700                 }
3701
3702                 if (atomic_read(&queue->set_pci_flags_count))
3703                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3704         }
3705
3706         QETH_TXQ_STAT_INC(queue, doorbell);
3707         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3708                      queue->queue_no, index, count);
3709
3710         /* Fake the TX completion interrupt: */
3711         if (IS_IQD(card)) {
3712                 unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3713                 unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3714
3715                 if (frames && queue->coalesced_frames >= frames) {
3716                         napi_schedule(&queue->napi);
3717                         queue->coalesced_frames = 0;
3718                         QETH_TXQ_STAT_INC(queue, coal_frames);
3719                 } else if (usecs) {
3720                         qeth_tx_arm_timer(queue, usecs);
3721                 }
3722         }
3723
3724         if (rc) {
3725                 /* ignore temporary SIGA errors without busy condition */
3726                 if (rc == -ENOBUFS)
3727                         return;
3728                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3729                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3730                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3731                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3732                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3733
3734                 /* this must not happen under normal circumstances. if it
3735                  * happens something is really wrong -> recover */
3736                 qeth_schedule_recovery(queue->card);
3737                 return;
3738         }
3739 }
3740
3741 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3742 {
3743         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3744
3745         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3746         queue->prev_hdr = NULL;
3747         queue->bulk_count = 0;
3748 }
3749
3750 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3751 {
3752         int index;
3753         int flush_cnt = 0;
3754         int q_was_packing = 0;
3755
3756         /*
3757          * check if weed have to switch to non-packing mode or if
3758          * we have to get a pci flag out on the queue
3759          */
3760         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3761             !atomic_read(&queue->set_pci_flags_count)) {
3762                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3763                                 QETH_OUT_Q_UNLOCKED) {
3764                         /*
3765                          * If we get in here, there was no action in
3766                          * do_send_packet. So, we check if there is a
3767                          * packing buffer to be flushed here.
3768                          */
3769                         index = queue->next_buf_to_fill;
3770                         q_was_packing = queue->do_pack;
3771                         /* queue->do_pack may change */
3772                         barrier();
3773                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3774                         if (!flush_cnt &&
3775                             !atomic_read(&queue->set_pci_flags_count))
3776                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3777                         if (q_was_packing)
3778                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3779                         if (flush_cnt)
3780                                 qeth_flush_buffers(queue, index, flush_cnt);
3781                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3782                 }
3783         }
3784 }
3785
3786 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3787 {
3788         struct qeth_card *card = (struct qeth_card *)card_ptr;
3789
3790         napi_schedule_irqoff(&card->napi);
3791 }
3792
3793 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3794 {
3795         int rc;
3796
3797         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3798                 rc = -1;
3799                 goto out;
3800         } else {
3801                 if (card->options.cq == cq) {
3802                         rc = 0;
3803                         goto out;
3804                 }
3805
3806                 qeth_free_qdio_queues(card);
3807                 card->options.cq = cq;
3808                 rc = 0;
3809         }
3810 out:
3811         return rc;
3812
3813 }
3814 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3815
3816 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3817                                  unsigned int queue, int first_element,
3818                                  int count)
3819 {
3820         struct qeth_qdio_q *cq = card->qdio.c_q;
3821         int i;
3822         int rc;
3823
3824         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3825         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3826         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3827
3828         if (qdio_err) {
3829                 netif_tx_stop_all_queues(card->dev);
3830                 qeth_schedule_recovery(card);
3831                 return;
3832         }
3833
3834         for (i = first_element; i < first_element + count; ++i) {
3835                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3836                 int e = 0;
3837
3838                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3839                        buffer->element[e].addr) {
3840                         unsigned long phys_aob_addr = buffer->element[e].addr;
3841
3842                         qeth_qdio_handle_aob(card, phys_aob_addr);
3843                         ++e;
3844                 }
3845                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3846         }
3847         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3848                     card->qdio.c_q->next_buf_to_init,
3849                     count);
3850         if (rc) {
3851                 dev_warn(&card->gdev->dev,
3852                         "QDIO reported an error, rc=%i\n", rc);
3853                 QETH_CARD_TEXT(card, 2, "qcqherr");
3854         }
3855
3856         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3857 }
3858
3859 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3860                                     unsigned int qdio_err, int queue,
3861                                     int first_elem, int count,
3862                                     unsigned long card_ptr)
3863 {
3864         struct qeth_card *card = (struct qeth_card *)card_ptr;
3865
3866         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3867         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3868
3869         if (qdio_err)
3870                 qeth_schedule_recovery(card);
3871 }
3872
3873 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3874                                      unsigned int qdio_error, int __queue,
3875                                      int first_element, int count,
3876                                      unsigned long card_ptr)
3877 {
3878         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3879         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3880         struct net_device *dev = card->dev;
3881         struct netdev_queue *txq;
3882         int i;
3883
3884         QETH_CARD_TEXT(card, 6, "qdouhdl");
3885         if (qdio_error & QDIO_ERROR_FATAL) {
3886                 QETH_CARD_TEXT(card, 2, "achkcond");
3887                 netif_tx_stop_all_queues(dev);
3888                 qeth_schedule_recovery(card);
3889                 return;
3890         }
3891
3892         for (i = first_element; i < (first_element + count); ++i) {
3893                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3894
3895                 qeth_handle_send_error(card, buf, qdio_error);
3896                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3897         }
3898
3899         atomic_sub(count, &queue->used_buffers);
3900         qeth_check_outbound_queue(queue);
3901
3902         txq = netdev_get_tx_queue(dev, __queue);
3903         /* xmit may have observed the full-condition, but not yet stopped the
3904          * txq. In which case the code below won't trigger. So before returning,
3905          * xmit will re-check the txq's fill level and wake it up if needed.
3906          */
3907         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3908                 netif_tx_wake_queue(txq);
3909 }
3910
3911 /**
3912  * Note: Function assumes that we have 4 outbound queues.
3913  */
3914 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3915 {
3916         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3917         u8 tos;
3918
3919         switch (card->qdio.do_prio_queueing) {
3920         case QETH_PRIO_Q_ING_TOS:
3921         case QETH_PRIO_Q_ING_PREC:
3922                 switch (qeth_get_ip_version(skb)) {
3923                 case 4:
3924                         tos = ipv4_get_dsfield(ip_hdr(skb));
3925                         break;
3926                 case 6:
3927                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3928                         break;
3929                 default:
3930                         return card->qdio.default_out_queue;
3931                 }
3932                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3933                         return ~tos >> 6 & 3;
3934                 if (tos & IPTOS_MINCOST)
3935                         return 3;
3936                 if (tos & IPTOS_RELIABILITY)
3937                         return 2;
3938                 if (tos & IPTOS_THROUGHPUT)
3939                         return 1;
3940                 if (tos & IPTOS_LOWDELAY)
3941                         return 0;
3942                 break;
3943         case QETH_PRIO_Q_ING_SKB:
3944                 if (skb->priority > 5)
3945                         return 0;
3946                 return ~skb->priority >> 1 & 3;
3947         case QETH_PRIO_Q_ING_VLAN:
3948                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3949                         return ~ntohs(veth->h_vlan_TCI) >>
3950                                (VLAN_PRIO_SHIFT + 1) & 3;
3951                 break;
3952         case QETH_PRIO_Q_ING_FIXED:
3953                 return card->qdio.default_out_queue;
3954         default:
3955                 break;
3956         }
3957         return card->qdio.default_out_queue;
3958 }
3959 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3960
3961 /**
3962  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3963  * @skb:                                SKB address
3964  *
3965  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3966  * fragmented part of the SKB. Returns zero for linear SKB.
3967  */
3968 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3969 {
3970         int cnt, elements = 0;
3971
3972         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3973                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3974
3975                 elements += qeth_get_elements_for_range(
3976                         (addr_t)skb_frag_address(frag),
3977                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3978         }
3979         return elements;
3980 }
3981
3982 /**
3983  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3984  *                              to transmit an skb.
3985  * @skb:                        the skb to operate on.
3986  * @data_offset:                skip this part of the skb's linear data
3987  *
3988  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3989  * skb's data (both its linear part and paged fragments).
3990  */
3991 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3992 {
3993         unsigned int elements = qeth_get_elements_for_frags(skb);
3994         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3995         addr_t start = (addr_t)skb->data + data_offset;
3996
3997         if (start != end)
3998                 elements += qeth_get_elements_for_range(start, end);
3999         return elements;
4000 }
4001 EXPORT_SYMBOL_GPL(qeth_count_elements);
4002
4003 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
4004                                          MAX_TCP_HEADER)
4005
4006 /**
4007  * qeth_add_hw_header() - add a HW header to an skb.
4008  * @skb: skb that the HW header should be added to.
4009  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
4010  *       it contains a valid pointer to a qeth_hdr.
4011  * @hdr_len: length of the HW header.
4012  * @proto_len: length of protocol headers that need to be in same page as the
4013  *             HW header.
4014  *
4015  * Returns the pushed length. If the header can't be pushed on
4016  * (eg. because it would cross a page boundary), it is allocated from
4017  * the cache instead and 0 is returned.
4018  * The number of needed buffer elements is returned in @elements.
4019  * Error to create the hdr is indicated by returning with < 0.
4020  */
4021 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
4022                               struct sk_buff *skb, struct qeth_hdr **hdr,
4023                               unsigned int hdr_len, unsigned int proto_len,
4024                               unsigned int *elements)
4025 {
4026         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
4027         const unsigned int contiguous = proto_len ? proto_len : 1;
4028         const unsigned int max_elements = queue->max_elements;
4029         unsigned int __elements;
4030         addr_t start, end;
4031         bool push_ok;
4032         int rc;
4033
4034 check_layout:
4035         start = (addr_t)skb->data - hdr_len;
4036         end = (addr_t)skb->data;
4037
4038         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4039                 /* Push HW header into same page as first protocol header. */
4040                 push_ok = true;
4041                 /* ... but TSO always needs a separate element for headers: */
4042                 if (skb_is_gso(skb))
4043                         __elements = 1 + qeth_count_elements(skb, proto_len);
4044                 else
4045                         __elements = qeth_count_elements(skb, 0);
4046         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4047                 /* Push HW header into preceding page, flush with skb->data. */
4048                 push_ok = true;
4049                 __elements = 1 + qeth_count_elements(skb, 0);
4050         } else {
4051                 /* Use header cache, copy protocol headers up. */
4052                 push_ok = false;
4053                 __elements = 1 + qeth_count_elements(skb, proto_len);
4054         }
4055
4056         /* Compress skb to fit into one IO buffer: */
4057         if (__elements > max_elements) {
4058                 if (!skb_is_nonlinear(skb)) {
4059                         /* Drop it, no easy way of shrinking it further. */
4060                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4061                                          max_elements, __elements, skb->len);
4062                         return -E2BIG;
4063                 }
4064
4065                 rc = skb_linearize(skb);
4066                 if (rc) {
4067                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4068                         return rc;
4069                 }
4070
4071                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4072                 /* Linearization changed the layout, re-evaluate: */
4073                 goto check_layout;
4074         }
4075
4076         *elements = __elements;
4077         /* Add the header: */
4078         if (push_ok) {
4079                 *hdr = skb_push(skb, hdr_len);
4080                 return hdr_len;
4081         }
4082
4083         /* Fall back to cache element with known-good alignment: */
4084         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4085                 return -E2BIG;
4086         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4087         if (!*hdr)
4088                 return -ENOMEM;
4089         /* Copy protocol headers behind HW header: */
4090         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4091         return 0;
4092 }
4093
4094 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4095                               struct sk_buff *curr_skb,
4096                               struct qeth_hdr *curr_hdr)
4097 {
4098         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4099         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4100
4101         if (!prev_hdr)
4102                 return true;
4103
4104         /* All packets must have the same target: */
4105         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4106                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4107
4108                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4109                                         eth_hdr(curr_skb)->h_dest) &&
4110                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4111         }
4112
4113         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4114                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4115 }
4116
4117 /**
4118  * qeth_fill_buffer() - map skb into an output buffer
4119  * @buf:        buffer to transport the skb
4120  * @skb:        skb to map into the buffer
4121  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4122  *              from qeth_core_header_cache.
4123  * @offset:     when mapping the skb, start at skb->data + offset
4124  * @hd_len:     if > 0, build a dedicated header element of this size
4125  */
4126 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4127                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4128                                      unsigned int offset, unsigned int hd_len)
4129 {
4130         struct qdio_buffer *buffer = buf->buffer;
4131         int element = buf->next_element_to_fill;
4132         int length = skb_headlen(skb) - offset;
4133         char *data = skb->data + offset;
4134         unsigned int elem_length, cnt;
4135         bool is_first_elem = true;
4136
4137         __skb_queue_tail(&buf->skb_list, skb);
4138
4139         /* build dedicated element for HW Header */
4140         if (hd_len) {
4141                 is_first_elem = false;
4142
4143                 buffer->element[element].addr = virt_to_phys(hdr);
4144                 buffer->element[element].length = hd_len;
4145                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4146
4147                 /* HW header is allocated from cache: */
4148                 if ((void *)hdr != skb->data)
4149                         buf->is_header[element] = 1;
4150                 /* HW header was pushed and is contiguous with linear part: */
4151                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4152                          (data == (char *)hdr + hd_len))
4153                         buffer->element[element].eflags |=
4154                                 SBAL_EFLAGS_CONTIGUOUS;
4155
4156                 element++;
4157         }
4158
4159         /* map linear part into buffer element(s) */
4160         while (length > 0) {
4161                 elem_length = min_t(unsigned int, length,
4162                                     PAGE_SIZE - offset_in_page(data));
4163
4164                 buffer->element[element].addr = virt_to_phys(data);
4165                 buffer->element[element].length = elem_length;
4166                 length -= elem_length;
4167                 if (is_first_elem) {
4168                         is_first_elem = false;
4169                         if (length || skb_is_nonlinear(skb))
4170                                 /* skb needs additional elements */
4171                                 buffer->element[element].eflags =
4172                                         SBAL_EFLAGS_FIRST_FRAG;
4173                         else
4174                                 buffer->element[element].eflags = 0;
4175                 } else {
4176                         buffer->element[element].eflags =
4177                                 SBAL_EFLAGS_MIDDLE_FRAG;
4178                 }
4179
4180                 data += elem_length;
4181                 element++;
4182         }
4183
4184         /* map page frags into buffer element(s) */
4185         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4186                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4187
4188                 data = skb_frag_address(frag);
4189                 length = skb_frag_size(frag);
4190                 while (length > 0) {
4191                         elem_length = min_t(unsigned int, length,
4192                                             PAGE_SIZE - offset_in_page(data));
4193
4194                         buffer->element[element].addr = virt_to_phys(data);
4195                         buffer->element[element].length = elem_length;
4196                         buffer->element[element].eflags =
4197                                 SBAL_EFLAGS_MIDDLE_FRAG;
4198
4199                         length -= elem_length;
4200                         data += elem_length;
4201                         element++;
4202                 }
4203         }
4204
4205         if (buffer->element[element - 1].eflags)
4206                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4207         buf->next_element_to_fill = element;
4208         return element;
4209 }
4210
4211 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4212                        struct sk_buff *skb, unsigned int elements,
4213                        struct qeth_hdr *hdr, unsigned int offset,
4214                        unsigned int hd_len)
4215 {
4216         unsigned int bytes = qdisc_pkt_len(skb);
4217         struct qeth_qdio_out_buffer *buffer;
4218         unsigned int next_element;
4219         struct netdev_queue *txq;
4220         bool stopped = false;
4221         bool flush;
4222
4223         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4224         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4225
4226         /* Just a sanity check, the wake/stop logic should ensure that we always
4227          * get a free buffer.
4228          */
4229         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4230                 return -EBUSY;
4231
4232         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4233
4234         if (flush ||
4235             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4236                 if (buffer->next_element_to_fill > 0) {
4237                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4238                         queue->bulk_count++;
4239                 }
4240
4241                 if (queue->bulk_count >= queue->bulk_max)
4242                         flush = true;
4243
4244                 if (flush)
4245                         qeth_flush_queue(queue);
4246
4247                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4248                                                 queue->bulk_count)];
4249
4250                 /* Sanity-check again: */
4251                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4252                         return -EBUSY;
4253         }
4254
4255         if (buffer->next_element_to_fill == 0 &&
4256             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4257                 /* If a TX completion happens right _here_ and misses to wake
4258                  * the txq, then our re-check below will catch the race.
4259                  */
4260                 QETH_TXQ_STAT_INC(queue, stopped);
4261                 netif_tx_stop_queue(txq);
4262                 stopped = true;
4263         }
4264
4265         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4266         buffer->bytes += bytes;
4267         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4268         queue->prev_hdr = hdr;
4269
4270         flush = __netdev_tx_sent_queue(txq, bytes,
4271                                        !stopped && netdev_xmit_more());
4272
4273         if (flush || next_element >= queue->max_elements) {
4274                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4275                 queue->bulk_count++;
4276
4277                 if (queue->bulk_count >= queue->bulk_max)
4278                         flush = true;
4279
4280                 if (flush)
4281                         qeth_flush_queue(queue);
4282         }
4283
4284         if (stopped && !qeth_out_queue_is_full(queue))
4285                 netif_tx_start_queue(txq);
4286         return 0;
4287 }
4288
4289 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4290                         struct sk_buff *skb, struct qeth_hdr *hdr,
4291                         unsigned int offset, unsigned int hd_len,
4292                         int elements_needed)
4293 {
4294         struct qeth_qdio_out_buffer *buffer;
4295         unsigned int next_element;
4296         struct netdev_queue *txq;
4297         bool stopped = false;
4298         int start_index;
4299         int flush_count = 0;
4300         int do_pack = 0;
4301         int tmp;
4302         int rc = 0;
4303
4304         /* spin until we get the queue ... */
4305         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4306                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4307         start_index = queue->next_buf_to_fill;
4308         buffer = queue->bufs[queue->next_buf_to_fill];
4309
4310         /* Just a sanity check, the wake/stop logic should ensure that we always
4311          * get a free buffer.
4312          */
4313         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4314                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4315                 return -EBUSY;
4316         }
4317
4318         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4319
4320         /* check if we need to switch packing state of this queue */
4321         qeth_switch_to_packing_if_needed(queue);
4322         if (queue->do_pack) {
4323                 do_pack = 1;
4324                 /* does packet fit in current buffer? */
4325                 if (buffer->next_element_to_fill + elements_needed >
4326                     queue->max_elements) {
4327                         /* ... no -> set state PRIMED */
4328                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4329                         flush_count++;
4330                         queue->next_buf_to_fill =
4331                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4332                         buffer = queue->bufs[queue->next_buf_to_fill];
4333
4334                         /* We stepped forward, so sanity-check again: */
4335                         if (atomic_read(&buffer->state) !=
4336                             QETH_QDIO_BUF_EMPTY) {
4337                                 qeth_flush_buffers(queue, start_index,
4338                                                            flush_count);
4339                                 atomic_set(&queue->state,
4340                                                 QETH_OUT_Q_UNLOCKED);
4341                                 rc = -EBUSY;
4342                                 goto out;
4343                         }
4344                 }
4345         }
4346
4347         if (buffer->next_element_to_fill == 0 &&
4348             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4349                 /* If a TX completion happens right _here_ and misses to wake
4350                  * the txq, then our re-check below will catch the race.
4351                  */
4352                 QETH_TXQ_STAT_INC(queue, stopped);
4353                 netif_tx_stop_queue(txq);
4354                 stopped = true;
4355         }
4356
4357         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4358         buffer->bytes += qdisc_pkt_len(skb);
4359         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4360
4361         if (queue->do_pack)
4362                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4363         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4364                 flush_count++;
4365                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4366                 queue->next_buf_to_fill =
4367                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4368         }
4369
4370         if (flush_count)
4371                 qeth_flush_buffers(queue, start_index, flush_count);
4372         else if (!atomic_read(&queue->set_pci_flags_count))
4373                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4374         /*
4375          * queue->state will go from LOCKED -> UNLOCKED or from
4376          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4377          * (switch packing state or flush buffer to get another pci flag out).
4378          * In that case we will enter this loop
4379          */
4380         while (atomic_dec_return(&queue->state)) {
4381                 start_index = queue->next_buf_to_fill;
4382                 /* check if we can go back to non-packing state */
4383                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4384                 /*
4385                  * check if we need to flush a packing buffer to get a pci
4386                  * flag out on the queue
4387                  */
4388                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4389                         tmp = qeth_prep_flush_pack_buffer(queue);
4390                 if (tmp) {
4391                         qeth_flush_buffers(queue, start_index, tmp);
4392                         flush_count += tmp;
4393                 }
4394         }
4395 out:
4396         /* at this point the queue is UNLOCKED again */
4397         if (do_pack)
4398                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4399
4400         if (stopped && !qeth_out_queue_is_full(queue))
4401                 netif_tx_start_queue(txq);
4402         return rc;
4403 }
4404 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4405
4406 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4407                               unsigned int payload_len, struct sk_buff *skb,
4408                               unsigned int proto_len)
4409 {
4410         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4411
4412         ext->hdr_tot_len = sizeof(*ext);
4413         ext->imb_hdr_no = 1;
4414         ext->hdr_type = 1;
4415         ext->hdr_version = 1;
4416         ext->hdr_len = 28;
4417         ext->payload_len = payload_len;
4418         ext->mss = skb_shinfo(skb)->gso_size;
4419         ext->dg_hdr_len = proto_len;
4420 }
4421
4422 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4423               struct qeth_qdio_out_q *queue, int ipv,
4424               void (*fill_header)(struct qeth_qdio_out_q *queue,
4425                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4426                                   int ipv, unsigned int data_len))
4427 {
4428         unsigned int proto_len, hw_hdr_len;
4429         unsigned int frame_len = skb->len;
4430         bool is_tso = skb_is_gso(skb);
4431         unsigned int data_offset = 0;
4432         struct qeth_hdr *hdr = NULL;
4433         unsigned int hd_len = 0;
4434         unsigned int elements;
4435         int push_len, rc;
4436
4437         if (is_tso) {
4438                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4439                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4440         } else {
4441                 hw_hdr_len = sizeof(struct qeth_hdr);
4442                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4443         }
4444
4445         rc = skb_cow_head(skb, hw_hdr_len);
4446         if (rc)
4447                 return rc;
4448
4449         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4450                                       &elements);
4451         if (push_len < 0)
4452                 return push_len;
4453         if (is_tso || !push_len) {
4454                 /* HW header needs its own buffer element. */
4455                 hd_len = hw_hdr_len + proto_len;
4456                 data_offset = push_len + proto_len;
4457         }
4458         memset(hdr, 0, hw_hdr_len);
4459         fill_header(queue, hdr, skb, ipv, frame_len);
4460         if (is_tso)
4461                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4462                                   frame_len - proto_len, skb, proto_len);
4463
4464         if (IS_IQD(card)) {
4465                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4466                                  hd_len);
4467         } else {
4468                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4469                 skb_orphan(skb);
4470                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4471                                          hd_len, elements);
4472         }
4473
4474         if (rc && !push_len)
4475                 kmem_cache_free(qeth_core_header_cache, hdr);
4476
4477         return rc;
4478 }
4479 EXPORT_SYMBOL_GPL(qeth_xmit);
4480
4481 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4482                 struct qeth_reply *reply, unsigned long data)
4483 {
4484         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4485         struct qeth_ipacmd_setadpparms *setparms;
4486
4487         QETH_CARD_TEXT(card, 4, "prmadpcb");
4488
4489         setparms = &(cmd->data.setadapterparms);
4490         if (qeth_setadpparms_inspect_rc(cmd)) {
4491                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4492                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4493         }
4494         card->info.promisc_mode = setparms->data.mode;
4495         return (cmd->hdr.return_code) ? -EIO : 0;
4496 }
4497
4498 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4499 {
4500         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4501                                                     SET_PROMISC_MODE_OFF;
4502         struct qeth_cmd_buffer *iob;
4503         struct qeth_ipa_cmd *cmd;
4504
4505         QETH_CARD_TEXT(card, 4, "setprom");
4506         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4507
4508         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4509                                    SETADP_DATA_SIZEOF(mode));
4510         if (!iob)
4511                 return;
4512         cmd = __ipa_cmd(iob);
4513         cmd->data.setadapterparms.data.mode = mode;
4514         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4515 }
4516 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4517
4518 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4519                 struct qeth_reply *reply, unsigned long data)
4520 {
4521         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4522         struct qeth_ipacmd_setadpparms *adp_cmd;
4523
4524         QETH_CARD_TEXT(card, 4, "chgmaccb");
4525         if (qeth_setadpparms_inspect_rc(cmd))
4526                 return -EIO;
4527
4528         adp_cmd = &cmd->data.setadapterparms;
4529         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4530                 return -EADDRNOTAVAIL;
4531
4532         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4533             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4534                 return -EADDRNOTAVAIL;
4535
4536         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4537         return 0;
4538 }
4539
4540 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4541 {
4542         int rc;
4543         struct qeth_cmd_buffer *iob;
4544         struct qeth_ipa_cmd *cmd;
4545
4546         QETH_CARD_TEXT(card, 4, "chgmac");
4547
4548         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4549                                    SETADP_DATA_SIZEOF(change_addr));
4550         if (!iob)
4551                 return -ENOMEM;
4552         cmd = __ipa_cmd(iob);
4553         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4554         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4555         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4556                         card->dev->dev_addr);
4557         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4558                                NULL);
4559         return rc;
4560 }
4561 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4562
4563 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4564                 struct qeth_reply *reply, unsigned long data)
4565 {
4566         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4567         struct qeth_set_access_ctrl *access_ctrl_req;
4568
4569         QETH_CARD_TEXT(card, 4, "setaccb");
4570
4571         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4572         QETH_CARD_TEXT_(card, 2, "rc=%d",
4573                         cmd->data.setadapterparms.hdr.return_code);
4574         if (cmd->data.setadapterparms.hdr.return_code !=
4575                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4576                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4577                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4578                                  cmd->data.setadapterparms.hdr.return_code);
4579         switch (qeth_setadpparms_inspect_rc(cmd)) {
4580         case SET_ACCESS_CTRL_RC_SUCCESS:
4581                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4582                         dev_info(&card->gdev->dev,
4583                             "QDIO data connection isolation is deactivated\n");
4584                 else
4585                         dev_info(&card->gdev->dev,
4586                             "QDIO data connection isolation is activated\n");
4587                 return 0;
4588         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4589                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4590                                  CARD_DEVID(card));
4591                 return 0;
4592         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4593                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4594                                  CARD_DEVID(card));
4595                 return 0;
4596         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4597                 dev_err(&card->gdev->dev, "Adapter does not "
4598                         "support QDIO data connection isolation\n");
4599                 return -EOPNOTSUPP;
4600         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4601                 dev_err(&card->gdev->dev,
4602                         "Adapter is dedicated. "
4603                         "QDIO data connection isolation not supported\n");
4604                 return -EOPNOTSUPP;
4605         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4606                 dev_err(&card->gdev->dev,
4607                         "TSO does not permit QDIO data connection isolation\n");
4608                 return -EPERM;
4609         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4610                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4611                         "support reflective relay mode\n");
4612                 return -EOPNOTSUPP;
4613         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4614                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4615                                         "enabled at the adjacent switch port");
4616                 return -EREMOTEIO;
4617         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4618                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4619                                         "at the adjacent switch failed\n");
4620                 /* benign error while disabling ISOLATION_MODE_FWD */
4621                 return 0;
4622         default:
4623                 return -EIO;
4624         }
4625 }
4626
4627 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4628                                      enum qeth_ipa_isolation_modes mode)
4629 {
4630         int rc;
4631         struct qeth_cmd_buffer *iob;
4632         struct qeth_ipa_cmd *cmd;
4633         struct qeth_set_access_ctrl *access_ctrl_req;
4634
4635         QETH_CARD_TEXT(card, 4, "setacctl");
4636
4637         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4638                 dev_err(&card->gdev->dev,
4639                         "Adapter does not support QDIO data connection isolation\n");
4640                 return -EOPNOTSUPP;
4641         }
4642
4643         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4644                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4645         if (!iob)
4646                 return -ENOMEM;
4647         cmd = __ipa_cmd(iob);
4648         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4649         access_ctrl_req->subcmd_code = mode;
4650
4651         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4652                                NULL);
4653         if (rc) {
4654                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4655                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4656                                  rc, CARD_DEVID(card));
4657         }
4658
4659         return rc;
4660 }
4661
4662 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4663 {
4664         struct qeth_card *card;
4665
4666         card = dev->ml_priv;
4667         QETH_CARD_TEXT(card, 4, "txtimeo");
4668         qeth_schedule_recovery(card);
4669 }
4670 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4671
4672 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4673 {
4674         struct qeth_card *card = dev->ml_priv;
4675         int rc = 0;
4676
4677         switch (regnum) {
4678         case MII_BMCR: /* Basic mode control register */
4679                 rc = BMCR_FULLDPLX;
4680                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4681                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4682                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4683                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4684                         rc |= BMCR_SPEED100;
4685                 break;
4686         case MII_BMSR: /* Basic mode status register */
4687                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4688                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4689                      BMSR_100BASE4;
4690                 break;
4691         case MII_PHYSID1: /* PHYS ID 1 */
4692                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4693                      dev->dev_addr[2];
4694                 rc = (rc >> 5) & 0xFFFF;
4695                 break;
4696         case MII_PHYSID2: /* PHYS ID 2 */
4697                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4698                 break;
4699         case MII_ADVERTISE: /* Advertisement control reg */
4700                 rc = ADVERTISE_ALL;
4701                 break;
4702         case MII_LPA: /* Link partner ability reg */
4703                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4704                      LPA_100BASE4 | LPA_LPACK;
4705                 break;
4706         case MII_EXPANSION: /* Expansion register */
4707                 break;
4708         case MII_DCOUNTER: /* disconnect counter */
4709                 break;
4710         case MII_FCSCOUNTER: /* false carrier counter */
4711                 break;
4712         case MII_NWAYTEST: /* N-way auto-neg test register */
4713                 break;
4714         case MII_RERRCOUNTER: /* rx error counter */
4715                 rc = card->stats.rx_length_errors +
4716                      card->stats.rx_frame_errors +
4717                      card->stats.rx_fifo_errors;
4718                 break;
4719         case MII_SREVISION: /* silicon revision */
4720                 break;
4721         case MII_RESV1: /* reserved 1 */
4722                 break;
4723         case MII_LBRERROR: /* loopback, rx, bypass error */
4724                 break;
4725         case MII_PHYADDR: /* physical address */
4726                 break;
4727         case MII_RESV2: /* reserved 2 */
4728                 break;
4729         case MII_TPISTATUS: /* TPI status for 10mbps */
4730                 break;
4731         case MII_NCONFIG: /* network interface config */
4732                 break;
4733         default:
4734                 break;
4735         }
4736         return rc;
4737 }
4738
4739 static int qeth_snmp_command_cb(struct qeth_card *card,
4740                                 struct qeth_reply *reply, unsigned long data)
4741 {
4742         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4743         struct qeth_arp_query_info *qinfo = reply->param;
4744         struct qeth_ipacmd_setadpparms *adp_cmd;
4745         unsigned int data_len;
4746         void *snmp_data;
4747
4748         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4749
4750         if (cmd->hdr.return_code) {
4751                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4752                 return -EIO;
4753         }
4754         if (cmd->data.setadapterparms.hdr.return_code) {
4755                 cmd->hdr.return_code =
4756                         cmd->data.setadapterparms.hdr.return_code;
4757                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4758                 return -EIO;
4759         }
4760
4761         adp_cmd = &cmd->data.setadapterparms;
4762         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4763         if (adp_cmd->hdr.seq_no == 1) {
4764                 snmp_data = &adp_cmd->data.snmp;
4765         } else {
4766                 snmp_data = &adp_cmd->data.snmp.request;
4767                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4768         }
4769
4770         /* check if there is enough room in userspace */
4771         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4772                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4773                 return -ENOSPC;
4774         }
4775         QETH_CARD_TEXT_(card, 4, "snore%i",
4776                         cmd->data.setadapterparms.hdr.used_total);
4777         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4778                         cmd->data.setadapterparms.hdr.seq_no);
4779         /*copy entries to user buffer*/
4780         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4781         qinfo->udata_offset += data_len;
4782
4783         if (cmd->data.setadapterparms.hdr.seq_no <
4784             cmd->data.setadapterparms.hdr.used_total)
4785                 return 1;
4786         return 0;
4787 }
4788
4789 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4790 {
4791         struct qeth_snmp_ureq __user *ureq;
4792         struct qeth_cmd_buffer *iob;
4793         unsigned int req_len;
4794         struct qeth_arp_query_info qinfo = {0, };
4795         int rc = 0;
4796
4797         QETH_CARD_TEXT(card, 3, "snmpcmd");
4798
4799         if (IS_VM_NIC(card))
4800                 return -EOPNOTSUPP;
4801
4802         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4803             IS_LAYER3(card))
4804                 return -EOPNOTSUPP;
4805
4806         ureq = (struct qeth_snmp_ureq __user *) udata;
4807         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4808             get_user(req_len, &ureq->hdr.req_len))
4809                 return -EFAULT;
4810
4811         /* Sanitize user input, to avoid overflows in iob size calculation: */
4812         if (req_len > QETH_BUFSIZE)
4813                 return -EINVAL;
4814
4815         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4816         if (!iob)
4817                 return -ENOMEM;
4818
4819         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4820                            &ureq->cmd, req_len)) {
4821                 qeth_put_cmd(iob);
4822                 return -EFAULT;
4823         }
4824
4825         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4826         if (!qinfo.udata) {
4827                 qeth_put_cmd(iob);
4828                 return -ENOMEM;
4829         }
4830         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4831
4832         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4833         if (rc)
4834                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4835                                  CARD_DEVID(card), rc);
4836         else {
4837                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4838                         rc = -EFAULT;
4839         }
4840
4841         kfree(qinfo.udata);
4842         return rc;
4843 }
4844
4845 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4846                                          struct qeth_reply *reply,
4847                                          unsigned long data)
4848 {
4849         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4850         struct qeth_qoat_priv *priv = reply->param;
4851         int resdatalen;
4852
4853         QETH_CARD_TEXT(card, 3, "qoatcb");
4854         if (qeth_setadpparms_inspect_rc(cmd))
4855                 return -EIO;
4856
4857         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4858
4859         if (resdatalen > (priv->buffer_len - priv->response_len))
4860                 return -ENOSPC;
4861
4862         memcpy(priv->buffer + priv->response_len,
4863                &cmd->data.setadapterparms.hdr, resdatalen);
4864         priv->response_len += resdatalen;
4865
4866         if (cmd->data.setadapterparms.hdr.seq_no <
4867             cmd->data.setadapterparms.hdr.used_total)
4868                 return 1;
4869         return 0;
4870 }
4871
4872 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4873 {
4874         int rc = 0;
4875         struct qeth_cmd_buffer *iob;
4876         struct qeth_ipa_cmd *cmd;
4877         struct qeth_query_oat *oat_req;
4878         struct qeth_query_oat_data oat_data;
4879         struct qeth_qoat_priv priv;
4880         void __user *tmp;
4881
4882         QETH_CARD_TEXT(card, 3, "qoatcmd");
4883
4884         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4885                 return -EOPNOTSUPP;
4886
4887         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4888                 return -EFAULT;
4889
4890         priv.buffer_len = oat_data.buffer_len;
4891         priv.response_len = 0;
4892         priv.buffer = vzalloc(oat_data.buffer_len);
4893         if (!priv.buffer)
4894                 return -ENOMEM;
4895
4896         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4897                                    SETADP_DATA_SIZEOF(query_oat));
4898         if (!iob) {
4899                 rc = -ENOMEM;
4900                 goto out_free;
4901         }
4902         cmd = __ipa_cmd(iob);
4903         oat_req = &cmd->data.setadapterparms.data.query_oat;
4904         oat_req->subcmd_code = oat_data.command;
4905
4906         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4907         if (!rc) {
4908                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4909                                          u64_to_user_ptr(oat_data.ptr);
4910                 oat_data.response_len = priv.response_len;
4911
4912                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4913                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4914                         rc = -EFAULT;
4915         }
4916
4917 out_free:
4918         vfree(priv.buffer);
4919         return rc;
4920 }
4921
4922 static int qeth_query_card_info_cb(struct qeth_card *card,
4923                                    struct qeth_reply *reply, unsigned long data)
4924 {
4925         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4926         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4927         struct qeth_query_card_info *card_info;
4928
4929         QETH_CARD_TEXT(card, 2, "qcrdincb");
4930         if (qeth_setadpparms_inspect_rc(cmd))
4931                 return -EIO;
4932
4933         card_info = &cmd->data.setadapterparms.data.card_info;
4934         carrier_info->card_type = card_info->card_type;
4935         carrier_info->port_mode = card_info->port_mode;
4936         carrier_info->port_speed = card_info->port_speed;
4937         return 0;
4938 }
4939
4940 int qeth_query_card_info(struct qeth_card *card,
4941                          struct carrier_info *carrier_info)
4942 {
4943         struct qeth_cmd_buffer *iob;
4944
4945         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4946         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4947                 return -EOPNOTSUPP;
4948         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4949         if (!iob)
4950                 return -ENOMEM;
4951         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4952                                         (void *)carrier_info);
4953 }
4954
4955 /**
4956  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4957  * @card: pointer to a qeth_card
4958  *
4959  * Returns
4960  *      0, if a MAC address has been set for the card's netdevice
4961  *      a return code, for various error conditions
4962  */
4963 int qeth_vm_request_mac(struct qeth_card *card)
4964 {
4965         struct diag26c_mac_resp *response;
4966         struct diag26c_mac_req *request;
4967         struct ccw_dev_id id;
4968         int rc;
4969
4970         QETH_CARD_TEXT(card, 2, "vmreqmac");
4971
4972         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4973         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4974         if (!request || !response) {
4975                 rc = -ENOMEM;
4976                 goto out;
4977         }
4978
4979         ccw_device_get_id(CARD_DDEV(card), &id);
4980         request->resp_buf_len = sizeof(*response);
4981         request->resp_version = DIAG26C_VERSION2;
4982         request->op_code = DIAG26C_GET_MAC;
4983         request->devno = id.devno;
4984
4985         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4986         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4987         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4988         if (rc)
4989                 goto out;
4990         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4991
4992         if (request->resp_buf_len < sizeof(*response) ||
4993             response->version != request->resp_version) {
4994                 rc = -EIO;
4995                 QETH_CARD_TEXT(card, 2, "badresp");
4996                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4997                               sizeof(request->resp_buf_len));
4998         } else if (!is_valid_ether_addr(response->mac)) {
4999                 rc = -EINVAL;
5000                 QETH_CARD_TEXT(card, 2, "badmac");
5001                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5002         } else {
5003                 ether_addr_copy(card->dev->dev_addr, response->mac);
5004         }
5005
5006 out:
5007         kfree(response);
5008         kfree(request);
5009         return rc;
5010 }
5011 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5012
5013 static void qeth_determine_capabilities(struct qeth_card *card)
5014 {
5015         struct qeth_channel *channel = &card->data;
5016         struct ccw_device *ddev = channel->ccwdev;
5017         int rc;
5018         int ddev_offline = 0;
5019
5020         QETH_CARD_TEXT(card, 2, "detcapab");
5021         if (!ddev->online) {
5022                 ddev_offline = 1;
5023                 rc = qeth_start_channel(channel);
5024                 if (rc) {
5025                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5026                         goto out;
5027                 }
5028         }
5029
5030         rc = qeth_read_conf_data(card);
5031         if (rc) {
5032                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5033                                  CARD_DEVID(card), rc);
5034                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5035                 goto out_offline;
5036         }
5037
5038         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5039         if (rc)
5040                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5041
5042         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5043         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5044         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5045         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5046         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5047         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5048             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5049             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5050                 dev_info(&card->gdev->dev,
5051                         "Completion Queueing supported\n");
5052         } else {
5053                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5054         }
5055
5056
5057 out_offline:
5058         if (ddev_offline == 1)
5059                 qeth_stop_channel(channel);
5060 out:
5061         return;
5062 }
5063
5064 static int qeth_qdio_establish(struct qeth_card *card)
5065 {
5066         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5067         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5068         struct qdio_initialize init_data;
5069         char *qib_param_field;
5070         unsigned int i;
5071         int rc = 0;
5072
5073         QETH_CARD_TEXT(card, 2, "qdioest");
5074
5075         qib_param_field = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5076         if (!qib_param_field) {
5077                 rc =  -ENOMEM;
5078                 goto out_free_nothing;
5079         }
5080
5081         qeth_create_qib_param_field(card, qib_param_field);
5082         qeth_create_qib_param_field_blkt(card, qib_param_field);
5083
5084         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5085         if (card->options.cq == QETH_CQ_ENABLED)
5086                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5087
5088         for (i = 0; i < card->qdio.no_out_queues; i++)
5089                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5090
5091         memset(&init_data, 0, sizeof(struct qdio_initialize));
5092         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5093                                                           QDIO_QETH_QFMT;
5094         init_data.qib_param_field_format = 0;
5095         init_data.qib_param_field        = qib_param_field;
5096         init_data.no_input_qs            = card->qdio.no_in_queues;
5097         init_data.no_output_qs           = card->qdio.no_out_queues;
5098         init_data.input_handler          = qeth_qdio_input_handler;
5099         init_data.output_handler         = qeth_qdio_output_handler;
5100         init_data.irq_poll               = qeth_qdio_poll;
5101         init_data.int_parm               = (unsigned long) card;
5102         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5103         init_data.output_sbal_addr_array = out_sbal_ptrs;
5104         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5105         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5106
5107         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5108                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5109                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5110                                    init_data.no_output_qs);
5111                 if (rc) {
5112                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5113                         goto out;
5114                 }
5115                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5116                 if (rc) {
5117                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5118                         qdio_free(CARD_DDEV(card));
5119                 }
5120         }
5121
5122         switch (card->options.cq) {
5123         case QETH_CQ_ENABLED:
5124                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5125                 break;
5126         case QETH_CQ_DISABLED:
5127                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5128                 break;
5129         default:
5130                 break;
5131         }
5132 out:
5133         kfree(qib_param_field);
5134 out_free_nothing:
5135         return rc;
5136 }
5137
5138 static void qeth_core_free_card(struct qeth_card *card)
5139 {
5140         QETH_CARD_TEXT(card, 2, "freecrd");
5141
5142         unregister_service_level(&card->qeth_service_level);
5143         debugfs_remove_recursive(card->debugfs);
5144         qeth_put_cmd(card->read_cmd);
5145         destroy_workqueue(card->event_wq);
5146         dev_set_drvdata(&card->gdev->dev, NULL);
5147         kfree(card);
5148 }
5149
5150 void qeth_trace_features(struct qeth_card *card)
5151 {
5152         QETH_CARD_TEXT(card, 2, "features");
5153         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5154         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5155         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5156         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5157                       sizeof(card->info.diagass_support));
5158 }
5159 EXPORT_SYMBOL_GPL(qeth_trace_features);
5160
5161 static struct ccw_device_id qeth_ids[] = {
5162         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5163                                         .driver_info = QETH_CARD_TYPE_OSD},
5164         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5165                                         .driver_info = QETH_CARD_TYPE_IQD},
5166 #ifdef CONFIG_QETH_OSN
5167         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5168                                         .driver_info = QETH_CARD_TYPE_OSN},
5169 #endif
5170         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5171                                         .driver_info = QETH_CARD_TYPE_OSM},
5172 #ifdef CONFIG_QETH_OSX
5173         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5174                                         .driver_info = QETH_CARD_TYPE_OSX},
5175 #endif
5176         {},
5177 };
5178 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5179
5180 static struct ccw_driver qeth_ccw_driver = {
5181         .driver = {
5182                 .owner = THIS_MODULE,
5183                 .name = "qeth",
5184         },
5185         .ids = qeth_ids,
5186         .probe = ccwgroup_probe_ccwdev,
5187         .remove = ccwgroup_remove_ccwdev,
5188 };
5189
5190 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5191 {
5192         int retries = 3;
5193         int rc;
5194
5195         QETH_CARD_TEXT(card, 2, "hrdsetup");
5196         atomic_set(&card->force_alloc_skb, 0);
5197         rc = qeth_update_from_chp_desc(card);
5198         if (rc)
5199                 return rc;
5200 retry:
5201         if (retries < 3)
5202                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5203                                  CARD_DEVID(card));
5204         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5205         qeth_stop_channel(&card->data);
5206         qeth_stop_channel(&card->write);
5207         qeth_stop_channel(&card->read);
5208         qdio_free(CARD_DDEV(card));
5209
5210         rc = qeth_start_channel(&card->read);
5211         if (rc)
5212                 goto retriable;
5213         rc = qeth_start_channel(&card->write);
5214         if (rc)
5215                 goto retriable;
5216         rc = qeth_start_channel(&card->data);
5217         if (rc)
5218                 goto retriable;
5219 retriable:
5220         if (rc == -ERESTARTSYS) {
5221                 QETH_CARD_TEXT(card, 2, "break1");
5222                 return rc;
5223         } else if (rc) {
5224                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5225                 if (--retries < 0)
5226                         goto out;
5227                 else
5228                         goto retry;
5229         }
5230
5231         qeth_determine_capabilities(card);
5232         qeth_idx_init(card);
5233
5234         rc = qeth_idx_activate_read_channel(card);
5235         if (rc == -EINTR) {
5236                 QETH_CARD_TEXT(card, 2, "break2");
5237                 return rc;
5238         } else if (rc) {
5239                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5240                 if (--retries < 0)
5241                         goto out;
5242                 else
5243                         goto retry;
5244         }
5245
5246         rc = qeth_idx_activate_write_channel(card);
5247         if (rc == -EINTR) {
5248                 QETH_CARD_TEXT(card, 2, "break3");
5249                 return rc;
5250         } else if (rc) {
5251                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5252                 if (--retries < 0)
5253                         goto out;
5254                 else
5255                         goto retry;
5256         }
5257         card->read_or_write_problem = 0;
5258         rc = qeth_mpc_initialize(card);
5259         if (rc) {
5260                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5261                 goto out;
5262         }
5263
5264         rc = qeth_send_startlan(card);
5265         if (rc) {
5266                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5267                 if (rc == -ENETDOWN) {
5268                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5269                         *carrier_ok = false;
5270                 } else {
5271                         goto out;
5272                 }
5273         } else {
5274                 *carrier_ok = true;
5275         }
5276
5277         card->options.ipa4.supported = 0;
5278         card->options.ipa6.supported = 0;
5279         card->options.adp.supported = 0;
5280         card->options.sbp.supported_funcs = 0;
5281         card->info.diagass_support = 0;
5282         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5283         if (rc == -ENOMEM)
5284                 goto out;
5285         if (qeth_is_supported(card, IPA_IPV6)) {
5286                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5287                 if (rc == -ENOMEM)
5288                         goto out;
5289         }
5290         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5291                 rc = qeth_query_setadapterparms(card);
5292                 if (rc < 0) {
5293                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5294                         goto out;
5295                 }
5296         }
5297         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5298                 rc = qeth_query_setdiagass(card);
5299                 if (rc)
5300                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5301         }
5302
5303         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5304             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5305                 card->info.hwtrap = 0;
5306
5307         if (card->options.isolation != ISOLATION_MODE_NONE) {
5308                 rc = qeth_setadpparms_set_access_ctrl(card,
5309                                                       card->options.isolation);
5310                 if (rc)
5311                         goto out;
5312         }
5313
5314         rc = qeth_init_qdio_queues(card);
5315         if (rc) {
5316                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5317                 goto out;
5318         }
5319
5320         return 0;
5321 out:
5322         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5323                 "an error on the device\n");
5324         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5325                          CARD_DEVID(card), rc);
5326         return rc;
5327 }
5328 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5329
5330 static int qeth_set_online(struct qeth_card *card)
5331 {
5332         int rc;
5333
5334         mutex_lock(&card->discipline_mutex);
5335         mutex_lock(&card->conf_mutex);
5336         QETH_CARD_TEXT(card, 2, "setonlin");
5337
5338         rc = card->discipline->set_online(card);
5339
5340         mutex_unlock(&card->conf_mutex);
5341         mutex_unlock(&card->discipline_mutex);
5342
5343         return rc;
5344 }
5345
5346 int qeth_set_offline(struct qeth_card *card, bool resetting)
5347 {
5348         int rc, rc2, rc3;
5349
5350         mutex_lock(&card->discipline_mutex);
5351         mutex_lock(&card->conf_mutex);
5352         QETH_CARD_TEXT(card, 3, "setoffl");
5353
5354         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5355                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5356                 card->info.hwtrap = 1;
5357         }
5358
5359         rtnl_lock();
5360         card->info.open_when_online = card->dev->flags & IFF_UP;
5361         dev_close(card->dev);
5362         netif_device_detach(card->dev);
5363         netif_carrier_off(card->dev);
5364         rtnl_unlock();
5365
5366         card->discipline->set_offline(card);
5367
5368         rc  = qeth_stop_channel(&card->data);
5369         rc2 = qeth_stop_channel(&card->write);
5370         rc3 = qeth_stop_channel(&card->read);
5371         if (!rc)
5372                 rc = (rc2) ? rc2 : rc3;
5373         if (rc)
5374                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5375         qdio_free(CARD_DDEV(card));
5376
5377         /* let user_space know that device is offline */
5378         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5379
5380         mutex_unlock(&card->conf_mutex);
5381         mutex_unlock(&card->discipline_mutex);
5382         return 0;
5383 }
5384 EXPORT_SYMBOL_GPL(qeth_set_offline);
5385
5386 static int qeth_do_reset(void *data)
5387 {
5388         struct qeth_card *card = data;
5389         int rc;
5390
5391         QETH_CARD_TEXT(card, 2, "recover1");
5392         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5393                 return 0;
5394         QETH_CARD_TEXT(card, 2, "recover2");
5395         dev_warn(&card->gdev->dev,
5396                  "A recovery process has been started for the device\n");
5397
5398         qeth_set_offline(card, true);
5399         rc = qeth_set_online(card);
5400         if (!rc) {
5401                 dev_info(&card->gdev->dev,
5402                          "Device successfully recovered!\n");
5403         } else {
5404                 ccwgroup_set_offline(card->gdev);
5405                 dev_warn(&card->gdev->dev,
5406                          "The qeth device driver failed to recover an error on the device\n");
5407         }
5408         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5409         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5410         return 0;
5411 }
5412
5413 #if IS_ENABLED(CONFIG_QETH_L3)
5414 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5415                                 struct qeth_hdr *hdr)
5416 {
5417         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5418         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5419         struct net_device *dev = skb->dev;
5420
5421         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5422                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5423                                 "FAKELL", skb->len);
5424                 return;
5425         }
5426
5427         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5428                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5429                                                              ETH_P_IP;
5430                 unsigned char tg_addr[ETH_ALEN];
5431
5432                 skb_reset_network_header(skb);
5433                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5434                 case QETH_CAST_MULTICAST:
5435                         if (prot == ETH_P_IP)
5436                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5437                         else
5438                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5439                         QETH_CARD_STAT_INC(card, rx_multicast);
5440                         break;
5441                 case QETH_CAST_BROADCAST:
5442                         ether_addr_copy(tg_addr, dev->broadcast);
5443                         QETH_CARD_STAT_INC(card, rx_multicast);
5444                         break;
5445                 default:
5446                         if (card->options.sniffer)
5447                                 skb->pkt_type = PACKET_OTHERHOST;
5448                         ether_addr_copy(tg_addr, dev->dev_addr);
5449                 }
5450
5451                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5452                         dev_hard_header(skb, dev, prot, tg_addr,
5453                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5454                 else
5455                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5456                                         skb->len);
5457         }
5458
5459         /* copy VLAN tag from hdr into skb */
5460         if (!card->options.sniffer &&
5461             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5462                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5463                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5464                                 l3_hdr->vlan_id :
5465                                 l3_hdr->next_hop.rx.vlan_id;
5466
5467                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5468         }
5469 }
5470 #endif
5471
5472 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5473                              struct qeth_hdr *hdr, bool uses_frags)
5474 {
5475         struct napi_struct *napi = &card->napi;
5476         bool is_cso;
5477
5478         switch (hdr->hdr.l2.id) {
5479         case QETH_HEADER_TYPE_OSN:
5480                 skb_push(skb, sizeof(*hdr));
5481                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5482                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5483                 QETH_CARD_STAT_INC(card, rx_packets);
5484
5485                 card->osn_info.data_cb(skb);
5486                 return;
5487 #if IS_ENABLED(CONFIG_QETH_L3)
5488         case QETH_HEADER_TYPE_LAYER3:
5489                 qeth_l3_rebuild_skb(card, skb, hdr);
5490                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5491                 break;
5492 #endif
5493         case QETH_HEADER_TYPE_LAYER2:
5494                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5495                 break;
5496         default:
5497                 /* never happens */
5498                 if (uses_frags)
5499                         napi_free_frags(napi);
5500                 else
5501                         dev_kfree_skb_any(skb);
5502                 return;
5503         }
5504
5505         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5506                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5507                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5508         } else {
5509                 skb->ip_summed = CHECKSUM_NONE;
5510         }
5511
5512         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5513         QETH_CARD_STAT_INC(card, rx_packets);
5514         if (skb_is_nonlinear(skb)) {
5515                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5516                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5517                                    skb_shinfo(skb)->nr_frags);
5518         }
5519
5520         if (uses_frags) {
5521                 napi_gro_frags(napi);
5522         } else {
5523                 skb->protocol = eth_type_trans(skb, skb->dev);
5524                 napi_gro_receive(napi, skb);
5525         }
5526 }
5527
5528 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5529 {
5530         struct page *page = virt_to_page(data);
5531         unsigned int next_frag;
5532
5533         next_frag = skb_shinfo(skb)->nr_frags;
5534         get_page(page);
5535         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5536                         data_len);
5537 }
5538
5539 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5540 {
5541         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5542 }
5543
5544 static int qeth_extract_skb(struct qeth_card *card,
5545                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5546                             int *__offset)
5547 {
5548         struct qeth_priv *priv = netdev_priv(card->dev);
5549         struct qdio_buffer *buffer = qethbuffer->buffer;
5550         struct napi_struct *napi = &card->napi;
5551         struct qdio_buffer_element *element;
5552         unsigned int linear_len = 0;
5553         bool uses_frags = false;
5554         int offset = *__offset;
5555         bool use_rx_sg = false;
5556         unsigned int headroom;
5557         struct qeth_hdr *hdr;
5558         struct sk_buff *skb;
5559         int skb_len = 0;
5560
5561         element = &buffer->element[*element_no];
5562
5563 next_packet:
5564         /* qeth_hdr must not cross element boundaries */
5565         while (element->length < offset + sizeof(struct qeth_hdr)) {
5566                 if (qeth_is_last_sbale(element))
5567                         return -ENODATA;
5568                 element++;
5569                 offset = 0;
5570         }
5571
5572         hdr = phys_to_virt(element->addr) + offset;
5573         offset += sizeof(*hdr);
5574         skb = NULL;
5575
5576         switch (hdr->hdr.l2.id) {
5577         case QETH_HEADER_TYPE_LAYER2:
5578                 skb_len = hdr->hdr.l2.pkt_length;
5579                 linear_len = ETH_HLEN;
5580                 headroom = 0;
5581                 break;
5582         case QETH_HEADER_TYPE_LAYER3:
5583                 skb_len = hdr->hdr.l3.length;
5584                 if (!IS_LAYER3(card)) {
5585                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5586                         goto walk_packet;
5587                 }
5588
5589                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5590                         linear_len = ETH_HLEN;
5591                         headroom = 0;
5592                         break;
5593                 }
5594
5595                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5596                         linear_len = sizeof(struct ipv6hdr);
5597                 else
5598                         linear_len = sizeof(struct iphdr);
5599                 headroom = ETH_HLEN;
5600                 break;
5601         case QETH_HEADER_TYPE_OSN:
5602                 skb_len = hdr->hdr.osn.pdu_length;
5603                 if (!IS_OSN(card)) {
5604                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5605                         goto walk_packet;
5606                 }
5607
5608                 linear_len = skb_len;
5609                 headroom = sizeof(struct qeth_hdr);
5610                 break;
5611         default:
5612                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5613                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5614                 else
5615                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5616
5617                 /* Can't determine packet length, drop the whole buffer. */
5618                 return -EPROTONOSUPPORT;
5619         }
5620
5621         if (skb_len < linear_len) {
5622                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5623                 goto walk_packet;
5624         }
5625
5626         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5627                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5628                      !atomic_read(&card->force_alloc_skb) &&
5629                      !IS_OSN(card));
5630
5631         if (use_rx_sg) {
5632                 /* QETH_CQ_ENABLED only: */
5633                 if (qethbuffer->rx_skb &&
5634                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5635                         skb = qethbuffer->rx_skb;
5636                         qethbuffer->rx_skb = NULL;
5637                         goto use_skb;
5638                 }
5639
5640                 skb = napi_get_frags(napi);
5641                 if (!skb) {
5642                         /* -ENOMEM, no point in falling back further. */
5643                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5644                         goto walk_packet;
5645                 }
5646
5647                 if (skb_tailroom(skb) >= linear_len + headroom) {
5648                         uses_frags = true;
5649                         goto use_skb;
5650                 }
5651
5652                 netdev_info_once(card->dev,
5653                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5654                                  linear_len + headroom, skb_tailroom(skb));
5655                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5656         }
5657
5658         linear_len = skb_len;
5659         skb = napi_alloc_skb(napi, linear_len + headroom);
5660         if (!skb) {
5661                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5662                 goto walk_packet;
5663         }
5664
5665 use_skb:
5666         if (headroom)
5667                 skb_reserve(skb, headroom);
5668 walk_packet:
5669         while (skb_len) {
5670                 int data_len = min(skb_len, (int)(element->length - offset));
5671                 char *data = phys_to_virt(element->addr) + offset;
5672
5673                 skb_len -= data_len;
5674                 offset += data_len;
5675
5676                 /* Extract data from current element: */
5677                 if (skb && data_len) {
5678                         if (linear_len) {
5679                                 unsigned int copy_len;
5680
5681                                 copy_len = min_t(unsigned int, linear_len,
5682                                                  data_len);
5683
5684                                 skb_put_data(skb, data, copy_len);
5685                                 linear_len -= copy_len;
5686                                 data_len -= copy_len;
5687                                 data += copy_len;
5688                         }
5689
5690                         if (data_len)
5691                                 qeth_create_skb_frag(skb, data, data_len);
5692                 }
5693
5694                 /* Step forward to next element: */
5695                 if (skb_len) {
5696                         if (qeth_is_last_sbale(element)) {
5697                                 QETH_CARD_TEXT(card, 4, "unexeob");
5698                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5699                                 if (skb) {
5700                                         if (uses_frags)
5701                                                 napi_free_frags(napi);
5702                                         else
5703                                                 dev_kfree_skb_any(skb);
5704                                         QETH_CARD_STAT_INC(card,
5705                                                            rx_length_errors);
5706                                 }
5707                                 return -EMSGSIZE;
5708                         }
5709                         element++;
5710                         offset = 0;
5711                 }
5712         }
5713
5714         /* This packet was skipped, go get another one: */
5715         if (!skb)
5716                 goto next_packet;
5717
5718         *element_no = element - &buffer->element[0];
5719         *__offset = offset;
5720
5721         qeth_receive_skb(card, skb, hdr, uses_frags);
5722         return 0;
5723 }
5724
5725 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5726                                       struct qeth_qdio_buffer *buf, bool *done)
5727 {
5728         unsigned int work_done = 0;
5729
5730         while (budget) {
5731                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5732                                      &card->rx.e_offset)) {
5733                         *done = true;
5734                         break;
5735                 }
5736
5737                 work_done++;
5738                 budget--;
5739         }
5740
5741         return work_done;
5742 }
5743
5744 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5745 {
5746         unsigned int work_done = 0;
5747
5748         while (budget > 0) {
5749                 struct qeth_qdio_buffer *buffer;
5750                 unsigned int skbs_done = 0;
5751                 bool done = false;
5752
5753                 /* Fetch completed RX buffers: */
5754                 if (!card->rx.b_count) {
5755                         card->rx.qdio_err = 0;
5756                         card->rx.b_count = qdio_get_next_buffers(
5757                                 card->data.ccwdev, 0, &card->rx.b_index,
5758                                 &card->rx.qdio_err);
5759                         if (card->rx.b_count <= 0) {
5760                                 card->rx.b_count = 0;
5761                                 break;
5762                         }
5763                 }
5764
5765                 /* Process one completed RX buffer: */
5766                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5767                 if (!(card->rx.qdio_err &&
5768                       qeth_check_qdio_errors(card, buffer->buffer,
5769                                              card->rx.qdio_err, "qinerr")))
5770                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5771                                                       &done);
5772                 else
5773                         done = true;
5774
5775                 work_done += skbs_done;
5776                 budget -= skbs_done;
5777
5778                 if (done) {
5779                         QETH_CARD_STAT_INC(card, rx_bufs);
5780                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5781                         buffer->pool_entry = NULL;
5782                         qeth_queue_input_buffer(card, card->rx.b_index);
5783                         card->rx.b_count--;
5784
5785                         /* Step forward to next buffer: */
5786                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5787                         card->rx.buf_element = 0;
5788                         card->rx.e_offset = 0;
5789                 }
5790         }
5791
5792         return work_done;
5793 }
5794
5795 static void qeth_cq_poll(struct qeth_card *card)
5796 {
5797         unsigned int work_done = 0;
5798
5799         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5800                 unsigned int start, error;
5801                 int completed;
5802
5803                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5804                                                &error);
5805                 if (completed <= 0)
5806                         return;
5807
5808                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5809                 work_done += completed;
5810         }
5811 }
5812
5813 int qeth_poll(struct napi_struct *napi, int budget)
5814 {
5815         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5816         unsigned int work_done;
5817
5818         work_done = qeth_rx_poll(card, budget);
5819
5820         if (card->options.cq == QETH_CQ_ENABLED)
5821                 qeth_cq_poll(card);
5822
5823         /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5824         if (budget && work_done >= budget)
5825                 return work_done;
5826
5827         if (napi_complete_done(napi, work_done) &&
5828             qdio_start_irq(CARD_DDEV(card)))
5829                 napi_schedule(napi);
5830
5831         return work_done;
5832 }
5833 EXPORT_SYMBOL_GPL(qeth_poll);
5834
5835 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5836                                  unsigned int bidx, bool error, int budget)
5837 {
5838         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5839         u8 sflags = buffer->buffer->element[15].sflags;
5840         struct qeth_card *card = queue->card;
5841
5842         if (queue->bufstates && (queue->bufstates[bidx].flags &
5843                                  QDIO_OUTBUF_STATE_FLAG_PENDING)) {
5844                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
5845
5846                 if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
5847                                                    QETH_QDIO_BUF_PENDING) ==
5848                     QETH_QDIO_BUF_PRIMED)
5849                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5850
5851                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5852
5853                 /* prepare the queue slot for re-use: */
5854                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5855                 if (qeth_init_qdio_out_buf(queue, bidx)) {
5856                         QETH_CARD_TEXT(card, 2, "outofbuf");
5857                         qeth_schedule_recovery(card);
5858                 }
5859
5860                 return;
5861         }
5862
5863         if (card->options.cq == QETH_CQ_ENABLED)
5864                 qeth_notify_skbs(queue, buffer,
5865                                  qeth_compute_cq_notification(sflags, 0));
5866         qeth_clear_output_buffer(queue, buffer, error, budget);
5867 }
5868
5869 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5870 {
5871         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5872         unsigned int queue_no = queue->queue_no;
5873         struct qeth_card *card = queue->card;
5874         struct net_device *dev = card->dev;
5875         unsigned int work_done = 0;
5876         struct netdev_queue *txq;
5877
5878         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5879
5880         while (1) {
5881                 unsigned int start, error, i;
5882                 unsigned int packets = 0;
5883                 unsigned int bytes = 0;
5884                 int completed;
5885
5886                 if (qeth_out_queue_is_empty(queue)) {
5887                         napi_complete(napi);
5888                         return 0;
5889                 }
5890
5891                 /* Give the CPU a breather: */
5892                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5893                         QETH_TXQ_STAT_INC(queue, completion_yield);
5894                         if (napi_complete_done(napi, 0))
5895                                 napi_schedule(napi);
5896                         return 0;
5897                 }
5898
5899                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
5900                                                &start, &error);
5901                 if (completed <= 0) {
5902                         /* Ensure we see TX completion for pending work: */
5903                         if (napi_complete_done(napi, 0))
5904                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
5905                         return 0;
5906                 }
5907
5908                 for (i = start; i < start + completed; i++) {
5909                         struct qeth_qdio_out_buffer *buffer;
5910                         unsigned int bidx = QDIO_BUFNR(i);
5911
5912                         buffer = queue->bufs[bidx];
5913                         packets += buffer->frames;
5914                         bytes += buffer->bytes;
5915
5916                         qeth_handle_send_error(card, buffer, error);
5917                         qeth_iqd_tx_complete(queue, bidx, error, budget);
5918                         qeth_cleanup_handled_pending(queue, bidx, false);
5919                 }
5920
5921                 netdev_tx_completed_queue(txq, packets, bytes);
5922                 atomic_sub(completed, &queue->used_buffers);
5923                 work_done += completed;
5924
5925                 /* xmit may have observed the full-condition, but not yet
5926                  * stopped the txq. In which case the code below won't trigger.
5927                  * So before returning, xmit will re-check the txq's fill level
5928                  * and wake it up if needed.
5929                  */
5930                 if (netif_tx_queue_stopped(txq) &&
5931                     !qeth_out_queue_is_full(queue))
5932                         netif_tx_wake_queue(txq);
5933         }
5934 }
5935
5936 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5937 {
5938         if (!cmd->hdr.return_code)
5939                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5940         return cmd->hdr.return_code;
5941 }
5942
5943 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5944                                         struct qeth_reply *reply,
5945                                         unsigned long data)
5946 {
5947         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5948         struct qeth_ipa_caps *caps = reply->param;
5949
5950         if (qeth_setassparms_inspect_rc(cmd))
5951                 return -EIO;
5952
5953         caps->supported = cmd->data.setassparms.data.caps.supported;
5954         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5955         return 0;
5956 }
5957
5958 int qeth_setassparms_cb(struct qeth_card *card,
5959                         struct qeth_reply *reply, unsigned long data)
5960 {
5961         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5962
5963         QETH_CARD_TEXT(card, 4, "defadpcb");
5964
5965         if (cmd->hdr.return_code)
5966                 return -EIO;
5967
5968         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5969         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5970                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
5971         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5972                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
5973         return 0;
5974 }
5975 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5976
5977 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5978                                                  enum qeth_ipa_funcs ipa_func,
5979                                                  u16 cmd_code,
5980                                                  unsigned int data_length,
5981                                                  enum qeth_prot_versions prot)
5982 {
5983         struct qeth_ipacmd_setassparms *setassparms;
5984         struct qeth_ipacmd_setassparms_hdr *hdr;
5985         struct qeth_cmd_buffer *iob;
5986
5987         QETH_CARD_TEXT(card, 4, "getasscm");
5988         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5989                                  data_length +
5990                                  offsetof(struct qeth_ipacmd_setassparms,
5991                                           data));
5992         if (!iob)
5993                 return NULL;
5994
5995         setassparms = &__ipa_cmd(iob)->data.setassparms;
5996         setassparms->assist_no = ipa_func;
5997
5998         hdr = &setassparms->hdr;
5999         hdr->length = sizeof(*hdr) + data_length;
6000         hdr->command_code = cmd_code;
6001         return iob;
6002 }
6003 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6004
6005 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6006                                       enum qeth_ipa_funcs ipa_func,
6007                                       u16 cmd_code, u32 *data,
6008                                       enum qeth_prot_versions prot)
6009 {
6010         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6011         struct qeth_cmd_buffer *iob;
6012
6013         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6014         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6015         if (!iob)
6016                 return -ENOMEM;
6017
6018         if (data)
6019                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6020         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6021 }
6022 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6023
6024 static void qeth_unregister_dbf_views(void)
6025 {
6026         int x;
6027         for (x = 0; x < QETH_DBF_INFOS; x++) {
6028                 debug_unregister(qeth_dbf[x].id);
6029                 qeth_dbf[x].id = NULL;
6030         }
6031 }
6032
6033 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6034 {
6035         char dbf_txt_buf[32];
6036         va_list args;
6037
6038         if (!debug_level_enabled(id, level))
6039                 return;
6040         va_start(args, fmt);
6041         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6042         va_end(args);
6043         debug_text_event(id, level, dbf_txt_buf);
6044 }
6045 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6046
6047 static int qeth_register_dbf_views(void)
6048 {
6049         int ret;
6050         int x;
6051
6052         for (x = 0; x < QETH_DBF_INFOS; x++) {
6053                 /* register the areas */
6054                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6055                                                 qeth_dbf[x].pages,
6056                                                 qeth_dbf[x].areas,
6057                                                 qeth_dbf[x].len);
6058                 if (qeth_dbf[x].id == NULL) {
6059                         qeth_unregister_dbf_views();
6060                         return -ENOMEM;
6061                 }
6062
6063                 /* register a view */
6064                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6065                 if (ret) {
6066                         qeth_unregister_dbf_views();
6067                         return ret;
6068                 }
6069
6070                 /* set a passing level */
6071                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6072         }
6073
6074         return 0;
6075 }
6076
6077 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6078
6079 int qeth_core_load_discipline(struct qeth_card *card,
6080                 enum qeth_discipline_id discipline)
6081 {
6082         mutex_lock(&qeth_mod_mutex);
6083         switch (discipline) {
6084         case QETH_DISCIPLINE_LAYER3:
6085                 card->discipline = try_then_request_module(
6086                         symbol_get(qeth_l3_discipline), "qeth_l3");
6087                 break;
6088         case QETH_DISCIPLINE_LAYER2:
6089                 card->discipline = try_then_request_module(
6090                         symbol_get(qeth_l2_discipline), "qeth_l2");
6091                 break;
6092         default:
6093                 break;
6094         }
6095         mutex_unlock(&qeth_mod_mutex);
6096
6097         if (!card->discipline) {
6098                 dev_err(&card->gdev->dev, "There is no kernel module to "
6099                         "support discipline %d\n", discipline);
6100                 return -EINVAL;
6101         }
6102
6103         card->options.layer = discipline;
6104         return 0;
6105 }
6106
6107 void qeth_core_free_discipline(struct qeth_card *card)
6108 {
6109         if (IS_LAYER2(card))
6110                 symbol_put(qeth_l2_discipline);
6111         else
6112                 symbol_put(qeth_l3_discipline);
6113         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6114         card->discipline = NULL;
6115 }
6116
6117 const struct device_type qeth_generic_devtype = {
6118         .name = "qeth_generic",
6119         .groups = qeth_generic_attr_groups,
6120 };
6121 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6122
6123 static const struct device_type qeth_osn_devtype = {
6124         .name = "qeth_osn",
6125         .groups = qeth_osn_attr_groups,
6126 };
6127
6128 #define DBF_NAME_LEN    20
6129
6130 struct qeth_dbf_entry {
6131         char dbf_name[DBF_NAME_LEN];
6132         debug_info_t *dbf_info;
6133         struct list_head dbf_list;
6134 };
6135
6136 static LIST_HEAD(qeth_dbf_list);
6137 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6138
6139 static debug_info_t *qeth_get_dbf_entry(char *name)
6140 {
6141         struct qeth_dbf_entry *entry;
6142         debug_info_t *rc = NULL;
6143
6144         mutex_lock(&qeth_dbf_list_mutex);
6145         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6146                 if (strcmp(entry->dbf_name, name) == 0) {
6147                         rc = entry->dbf_info;
6148                         break;
6149                 }
6150         }
6151         mutex_unlock(&qeth_dbf_list_mutex);
6152         return rc;
6153 }
6154
6155 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6156 {
6157         struct qeth_dbf_entry *new_entry;
6158
6159         card->debug = debug_register(name, 2, 1, 8);
6160         if (!card->debug) {
6161                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6162                 goto err;
6163         }
6164         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6165                 goto err_dbg;
6166         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6167         if (!new_entry)
6168                 goto err_dbg;
6169         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6170         new_entry->dbf_info = card->debug;
6171         mutex_lock(&qeth_dbf_list_mutex);
6172         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6173         mutex_unlock(&qeth_dbf_list_mutex);
6174
6175         return 0;
6176
6177 err_dbg:
6178         debug_unregister(card->debug);
6179 err:
6180         return -ENOMEM;
6181 }
6182
6183 static void qeth_clear_dbf_list(void)
6184 {
6185         struct qeth_dbf_entry *entry, *tmp;
6186
6187         mutex_lock(&qeth_dbf_list_mutex);
6188         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6189                 list_del(&entry->dbf_list);
6190                 debug_unregister(entry->dbf_info);
6191                 kfree(entry);
6192         }
6193         mutex_unlock(&qeth_dbf_list_mutex);
6194 }
6195
6196 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6197 {
6198         struct net_device *dev;
6199         struct qeth_priv *priv;
6200
6201         switch (card->info.type) {
6202         case QETH_CARD_TYPE_IQD:
6203                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6204                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6205                 break;
6206         case QETH_CARD_TYPE_OSM:
6207                 dev = alloc_etherdev(sizeof(*priv));
6208                 break;
6209         case QETH_CARD_TYPE_OSN:
6210                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6211                                    ether_setup);
6212                 break;
6213         default:
6214                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6215         }
6216
6217         if (!dev)
6218                 return NULL;
6219
6220         priv = netdev_priv(dev);
6221         priv->rx_copybreak = QETH_RX_COPYBREAK;
6222
6223         dev->ml_priv = card;
6224         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6225         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6226          /* initialized when device first goes online: */
6227         dev->max_mtu = 0;
6228         dev->mtu = 0;
6229         SET_NETDEV_DEV(dev, &card->gdev->dev);
6230         netif_carrier_off(dev);
6231
6232         dev->ethtool_ops = IS_OSN(card) ? &qeth_osn_ethtool_ops :
6233                                           &qeth_ethtool_ops;
6234
6235         return dev;
6236 }
6237
6238 struct net_device *qeth_clone_netdev(struct net_device *orig)
6239 {
6240         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6241
6242         if (!clone)
6243                 return NULL;
6244
6245         clone->dev_port = orig->dev_port;
6246         return clone;
6247 }
6248
6249 int qeth_setup_netdev(struct qeth_card *card)
6250 {
6251         struct net_device *dev = card->dev;
6252         unsigned int num_tx_queues;
6253
6254         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6255         dev->hw_features |= NETIF_F_SG;
6256         dev->vlan_features |= NETIF_F_SG;
6257
6258         if (IS_IQD(card)) {
6259                 dev->features |= NETIF_F_SG;
6260                 num_tx_queues = QETH_IQD_MIN_TXQ;
6261         } else if (IS_VM_NIC(card)) {
6262                 num_tx_queues = 1;
6263         } else {
6264                 num_tx_queues = dev->real_num_tx_queues;
6265         }
6266
6267         return qeth_set_real_num_tx_queues(card, num_tx_queues);
6268 }
6269 EXPORT_SYMBOL_GPL(qeth_setup_netdev);
6270
6271 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6272 {
6273         struct qeth_card *card;
6274         struct device *dev;
6275         int rc;
6276         enum qeth_discipline_id enforced_disc;
6277         char dbf_name[DBF_NAME_LEN];
6278
6279         QETH_DBF_TEXT(SETUP, 2, "probedev");
6280
6281         dev = &gdev->dev;
6282         if (!get_device(dev))
6283                 return -ENODEV;
6284
6285         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6286
6287         card = qeth_alloc_card(gdev);
6288         if (!card) {
6289                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6290                 rc = -ENOMEM;
6291                 goto err_dev;
6292         }
6293
6294         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6295                 dev_name(&gdev->dev));
6296         card->debug = qeth_get_dbf_entry(dbf_name);
6297         if (!card->debug) {
6298                 rc = qeth_add_dbf_entry(card, dbf_name);
6299                 if (rc)
6300                         goto err_card;
6301         }
6302
6303         qeth_setup_card(card);
6304         card->dev = qeth_alloc_netdev(card);
6305         if (!card->dev) {
6306                 rc = -ENOMEM;
6307                 goto err_card;
6308         }
6309
6310         qeth_determine_capabilities(card);
6311         qeth_set_blkt_defaults(card);
6312
6313         card->qdio.no_out_queues = card->dev->num_tx_queues;
6314         rc = qeth_update_from_chp_desc(card);
6315         if (rc)
6316                 goto err_chp_desc;
6317
6318         enforced_disc = qeth_enforce_discipline(card);
6319         switch (enforced_disc) {
6320         case QETH_DISCIPLINE_UNDETERMINED:
6321                 gdev->dev.type = &qeth_generic_devtype;
6322                 break;
6323         default:
6324                 card->info.layer_enforced = true;
6325                 rc = qeth_core_load_discipline(card, enforced_disc);
6326                 if (rc)
6327                         goto err_load;
6328
6329                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6330                                                 card->discipline->devtype;
6331                 rc = card->discipline->setup(card->gdev);
6332                 if (rc)
6333                         goto err_disc;
6334                 break;
6335         }
6336
6337         return 0;
6338
6339 err_disc:
6340         qeth_core_free_discipline(card);
6341 err_load:
6342 err_chp_desc:
6343         free_netdev(card->dev);
6344 err_card:
6345         qeth_core_free_card(card);
6346 err_dev:
6347         put_device(dev);
6348         return rc;
6349 }
6350
6351 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6352 {
6353         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6354
6355         QETH_CARD_TEXT(card, 2, "removedv");
6356
6357         if (card->discipline) {
6358                 card->discipline->remove(gdev);
6359                 qeth_core_free_discipline(card);
6360         }
6361
6362         qeth_free_qdio_queues(card);
6363
6364         free_netdev(card->dev);
6365         qeth_core_free_card(card);
6366         put_device(&gdev->dev);
6367 }
6368
6369 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6370 {
6371         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6372         int rc = 0;
6373         enum qeth_discipline_id def_discipline;
6374
6375         if (!card->discipline) {
6376                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6377                                                 QETH_DISCIPLINE_LAYER2;
6378                 rc = qeth_core_load_discipline(card, def_discipline);
6379                 if (rc)
6380                         goto err;
6381                 rc = card->discipline->setup(card->gdev);
6382                 if (rc) {
6383                         qeth_core_free_discipline(card);
6384                         goto err;
6385                 }
6386         }
6387
6388         rc = qeth_set_online(card);
6389 err:
6390         return rc;
6391 }
6392
6393 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6394 {
6395         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6396
6397         return qeth_set_offline(card, false);
6398 }
6399
6400 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6401 {
6402         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6403         qeth_set_allowed_threads(card, 0, 1);
6404         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6405                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6406         qeth_qdio_clear_card(card, 0);
6407         qeth_drain_output_queues(card);
6408         qdio_free(CARD_DDEV(card));
6409 }
6410
6411 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6412                            size_t count)
6413 {
6414         int err;
6415
6416         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6417                                   buf);
6418
6419         return err ? err : count;
6420 }
6421 static DRIVER_ATTR_WO(group);
6422
6423 static struct attribute *qeth_drv_attrs[] = {
6424         &driver_attr_group.attr,
6425         NULL,
6426 };
6427 static struct attribute_group qeth_drv_attr_group = {
6428         .attrs = qeth_drv_attrs,
6429 };
6430 static const struct attribute_group *qeth_drv_attr_groups[] = {
6431         &qeth_drv_attr_group,
6432         NULL,
6433 };
6434
6435 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6436         .driver = {
6437                 .groups = qeth_drv_attr_groups,
6438                 .owner = THIS_MODULE,
6439                 .name = "qeth",
6440         },
6441         .ccw_driver = &qeth_ccw_driver,
6442         .setup = qeth_core_probe_device,
6443         .remove = qeth_core_remove_device,
6444         .set_online = qeth_core_set_online,
6445         .set_offline = qeth_core_set_offline,
6446         .shutdown = qeth_core_shutdown,
6447 };
6448
6449 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6450 {
6451         struct ccwgroup_device *gdev;
6452         struct qeth_card *card;
6453
6454         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6455         if (!gdev)
6456                 return NULL;
6457
6458         card = dev_get_drvdata(&gdev->dev);
6459         put_device(&gdev->dev);
6460         return card;
6461 }
6462 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6463
6464 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6465 {
6466         struct qeth_card *card = dev->ml_priv;
6467         struct mii_ioctl_data *mii_data;
6468         int rc = 0;
6469
6470         switch (cmd) {
6471         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6472                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6473                 break;
6474         case SIOC_QETH_GET_CARD_TYPE:
6475                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6476                     !IS_VM_NIC(card))
6477                         return 1;
6478                 return 0;
6479         case SIOCGMIIPHY:
6480                 mii_data = if_mii(rq);
6481                 mii_data->phy_id = 0;
6482                 break;
6483         case SIOCGMIIREG:
6484                 mii_data = if_mii(rq);
6485                 if (mii_data->phy_id != 0)
6486                         rc = -EINVAL;
6487                 else
6488                         mii_data->val_out = qeth_mdio_read(dev,
6489                                 mii_data->phy_id, mii_data->reg_num);
6490                 break;
6491         case SIOC_QETH_QUERY_OAT:
6492                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6493                 break;
6494         default:
6495                 if (card->discipline->do_ioctl)
6496                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6497                 else
6498                         rc = -EOPNOTSUPP;
6499         }
6500         if (rc)
6501                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6502         return rc;
6503 }
6504 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6505
6506 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6507                               unsigned long data)
6508 {
6509         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6510         u32 *features = reply->param;
6511
6512         if (qeth_setassparms_inspect_rc(cmd))
6513                 return -EIO;
6514
6515         *features = cmd->data.setassparms.data.flags_32bit;
6516         return 0;
6517 }
6518
6519 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6520                              enum qeth_prot_versions prot)
6521 {
6522         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6523                                                  NULL, prot);
6524 }
6525
6526 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6527                             enum qeth_prot_versions prot, u8 *lp2lp)
6528 {
6529         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6530         struct qeth_cmd_buffer *iob;
6531         struct qeth_ipa_caps caps;
6532         u32 features;
6533         int rc;
6534
6535         /* some L3 HW requires combined L3+L4 csum offload: */
6536         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6537             cstype == IPA_OUTBOUND_CHECKSUM)
6538                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6539
6540         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6541                                        prot);
6542         if (!iob)
6543                 return -ENOMEM;
6544
6545         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6546         if (rc)
6547                 return rc;
6548
6549         if ((required_features & features) != required_features) {
6550                 qeth_set_csum_off(card, cstype, prot);
6551                 return -EOPNOTSUPP;
6552         }
6553
6554         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6555                                        SETASS_DATA_SIZEOF(flags_32bit),
6556                                        prot);
6557         if (!iob) {
6558                 qeth_set_csum_off(card, cstype, prot);
6559                 return -ENOMEM;
6560         }
6561
6562         if (features & QETH_IPA_CHECKSUM_LP2LP)
6563                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6564         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6565         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6566         if (rc) {
6567                 qeth_set_csum_off(card, cstype, prot);
6568                 return rc;
6569         }
6570
6571         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6572             !qeth_ipa_caps_enabled(&caps, required_features)) {
6573                 qeth_set_csum_off(card, cstype, prot);
6574                 return -EOPNOTSUPP;
6575         }
6576
6577         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6578                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6579
6580         if (lp2lp)
6581                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6582
6583         return 0;
6584 }
6585
6586 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6587                              enum qeth_prot_versions prot, u8 *lp2lp)
6588 {
6589         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6590                     qeth_set_csum_off(card, cstype, prot);
6591 }
6592
6593 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6594                              unsigned long data)
6595 {
6596         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6597         struct qeth_tso_start_data *tso_data = reply->param;
6598
6599         if (qeth_setassparms_inspect_rc(cmd))
6600                 return -EIO;
6601
6602         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6603         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6604         return 0;
6605 }
6606
6607 static int qeth_set_tso_off(struct qeth_card *card,
6608                             enum qeth_prot_versions prot)
6609 {
6610         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6611                                                  IPA_CMD_ASS_STOP, NULL, prot);
6612 }
6613
6614 static int qeth_set_tso_on(struct qeth_card *card,
6615                            enum qeth_prot_versions prot)
6616 {
6617         struct qeth_tso_start_data tso_data;
6618         struct qeth_cmd_buffer *iob;
6619         struct qeth_ipa_caps caps;
6620         int rc;
6621
6622         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6623                                        IPA_CMD_ASS_START, 0, prot);
6624         if (!iob)
6625                 return -ENOMEM;
6626
6627         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6628         if (rc)
6629                 return rc;
6630
6631         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6632                 qeth_set_tso_off(card, prot);
6633                 return -EOPNOTSUPP;
6634         }
6635
6636         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6637                                        IPA_CMD_ASS_ENABLE,
6638                                        SETASS_DATA_SIZEOF(caps), prot);
6639         if (!iob) {
6640                 qeth_set_tso_off(card, prot);
6641                 return -ENOMEM;
6642         }
6643
6644         /* enable TSO capability */
6645         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6646                 QETH_IPA_LARGE_SEND_TCP;
6647         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6648         if (rc) {
6649                 qeth_set_tso_off(card, prot);
6650                 return rc;
6651         }
6652
6653         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6654             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6655                 qeth_set_tso_off(card, prot);
6656                 return -EOPNOTSUPP;
6657         }
6658
6659         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6660                  tso_data.mss);
6661         return 0;
6662 }
6663
6664 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6665                             enum qeth_prot_versions prot)
6666 {
6667         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6668 }
6669
6670 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6671 {
6672         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6673         int rc_ipv6;
6674
6675         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6676                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6677                                             QETH_PROT_IPV4, NULL);
6678         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6679                 /* no/one Offload Assist available, so the rc is trivial */
6680                 return rc_ipv4;
6681
6682         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6683                                     QETH_PROT_IPV6, NULL);
6684
6685         if (on)
6686                 /* enable: success if any Assist is active */
6687                 return (rc_ipv6) ? rc_ipv4 : 0;
6688
6689         /* disable: failure if any Assist is still active */
6690         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6691 }
6692
6693 /**
6694  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6695  * @dev:        a net_device
6696  */
6697 void qeth_enable_hw_features(struct net_device *dev)
6698 {
6699         struct qeth_card *card = dev->ml_priv;
6700         netdev_features_t features;
6701
6702         features = dev->features;
6703         /* force-off any feature that might need an IPA sequence.
6704          * netdev_update_features() will restart them.
6705          */
6706         dev->features &= ~dev->hw_features;
6707         /* toggle VLAN filter, so that VIDs are re-programmed: */
6708         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6709                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6710                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6711         }
6712         netdev_update_features(dev);
6713         if (features != dev->features)
6714                 dev_warn(&card->gdev->dev,
6715                          "Device recovery failed to restore all offload features\n");
6716 }
6717 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6718
6719 static void qeth_check_restricted_features(struct qeth_card *card,
6720                                            netdev_features_t changed,
6721                                            netdev_features_t actual)
6722 {
6723         netdev_features_t ipv6_features = NETIF_F_TSO6;
6724         netdev_features_t ipv4_features = NETIF_F_TSO;
6725
6726         if (!card->info.has_lp2lp_cso_v6)
6727                 ipv6_features |= NETIF_F_IPV6_CSUM;
6728         if (!card->info.has_lp2lp_cso_v4)
6729                 ipv4_features |= NETIF_F_IP_CSUM;
6730
6731         if ((changed & ipv6_features) && !(actual & ipv6_features))
6732                 qeth_flush_local_addrs6(card);
6733         if ((changed & ipv4_features) && !(actual & ipv4_features))
6734                 qeth_flush_local_addrs4(card);
6735 }
6736
6737 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6738 {
6739         struct qeth_card *card = dev->ml_priv;
6740         netdev_features_t changed = dev->features ^ features;
6741         int rc = 0;
6742
6743         QETH_CARD_TEXT(card, 2, "setfeat");
6744         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6745
6746         if ((changed & NETIF_F_IP_CSUM)) {
6747                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6748                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6749                                        &card->info.has_lp2lp_cso_v4);
6750                 if (rc)
6751                         changed ^= NETIF_F_IP_CSUM;
6752         }
6753         if (changed & NETIF_F_IPV6_CSUM) {
6754                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6755                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6756                                        &card->info.has_lp2lp_cso_v6);
6757                 if (rc)
6758                         changed ^= NETIF_F_IPV6_CSUM;
6759         }
6760         if (changed & NETIF_F_RXCSUM) {
6761                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6762                 if (rc)
6763                         changed ^= NETIF_F_RXCSUM;
6764         }
6765         if (changed & NETIF_F_TSO) {
6766                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6767                                       QETH_PROT_IPV4);
6768                 if (rc)
6769                         changed ^= NETIF_F_TSO;
6770         }
6771         if (changed & NETIF_F_TSO6) {
6772                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6773                                       QETH_PROT_IPV6);
6774                 if (rc)
6775                         changed ^= NETIF_F_TSO6;
6776         }
6777
6778         qeth_check_restricted_features(card, dev->features ^ features,
6779                                        dev->features ^ changed);
6780
6781         /* everything changed successfully? */
6782         if ((dev->features ^ features) == changed)
6783                 return 0;
6784         /* something went wrong. save changed features and return error */
6785         dev->features ^= changed;
6786         return -EIO;
6787 }
6788 EXPORT_SYMBOL_GPL(qeth_set_features);
6789
6790 netdev_features_t qeth_fix_features(struct net_device *dev,
6791                                     netdev_features_t features)
6792 {
6793         struct qeth_card *card = dev->ml_priv;
6794
6795         QETH_CARD_TEXT(card, 2, "fixfeat");
6796         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6797                 features &= ~NETIF_F_IP_CSUM;
6798         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6799                 features &= ~NETIF_F_IPV6_CSUM;
6800         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6801             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6802                 features &= ~NETIF_F_RXCSUM;
6803         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6804                 features &= ~NETIF_F_TSO;
6805         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6806                 features &= ~NETIF_F_TSO6;
6807
6808         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6809         return features;
6810 }
6811 EXPORT_SYMBOL_GPL(qeth_fix_features);
6812
6813 netdev_features_t qeth_features_check(struct sk_buff *skb,
6814                                       struct net_device *dev,
6815                                       netdev_features_t features)
6816 {
6817         struct qeth_card *card = dev->ml_priv;
6818
6819         /* Traffic with local next-hop is not eligible for some offloads: */
6820         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6821             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6822                 netdev_features_t restricted = 0;
6823
6824                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6825                         restricted |= NETIF_F_ALL_TSO;
6826
6827                 switch (vlan_get_protocol(skb)) {
6828                 case htons(ETH_P_IP):
6829                         if (!card->info.has_lp2lp_cso_v4)
6830                                 restricted |= NETIF_F_IP_CSUM;
6831
6832                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6833                                 features &= ~restricted;
6834                         break;
6835                 case htons(ETH_P_IPV6):
6836                         if (!card->info.has_lp2lp_cso_v6)
6837                                 restricted |= NETIF_F_IPV6_CSUM;
6838
6839                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6840                                 features &= ~restricted;
6841                         break;
6842                 default:
6843                         break;
6844                 }
6845         }
6846
6847         /* GSO segmentation builds skbs with
6848          *      a (small) linear part for the headers, and
6849          *      page frags for the data.
6850          * Compared to a linear skb, the header-only part consumes an
6851          * additional buffer element. This reduces buffer utilization, and
6852          * hurts throughput. So compress small segments into one element.
6853          */
6854         if (netif_needs_gso(skb, features)) {
6855                 /* match skb_segment(): */
6856                 unsigned int doffset = skb->data - skb_mac_header(skb);
6857                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6858                 unsigned int hroom = skb_headroom(skb);
6859
6860                 /* linearize only if resulting skb allocations are order-0: */
6861                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6862                         features &= ~NETIF_F_SG;
6863         }
6864
6865         return vlan_features_check(skb, features);
6866 }
6867 EXPORT_SYMBOL_GPL(qeth_features_check);
6868
6869 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6870 {
6871         struct qeth_card *card = dev->ml_priv;
6872         struct qeth_qdio_out_q *queue;
6873         unsigned int i;
6874
6875         QETH_CARD_TEXT(card, 5, "getstat");
6876
6877         stats->rx_packets = card->stats.rx_packets;
6878         stats->rx_bytes = card->stats.rx_bytes;
6879         stats->rx_errors = card->stats.rx_length_errors +
6880                            card->stats.rx_frame_errors +
6881                            card->stats.rx_fifo_errors;
6882         stats->rx_dropped = card->stats.rx_dropped_nomem +
6883                             card->stats.rx_dropped_notsupp +
6884                             card->stats.rx_dropped_runt;
6885         stats->multicast = card->stats.rx_multicast;
6886         stats->rx_length_errors = card->stats.rx_length_errors;
6887         stats->rx_frame_errors = card->stats.rx_frame_errors;
6888         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6889
6890         for (i = 0; i < card->qdio.no_out_queues; i++) {
6891                 queue = card->qdio.out_qs[i];
6892
6893                 stats->tx_packets += queue->stats.tx_packets;
6894                 stats->tx_bytes += queue->stats.tx_bytes;
6895                 stats->tx_errors += queue->stats.tx_errors;
6896                 stats->tx_dropped += queue->stats.tx_dropped;
6897         }
6898 }
6899 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6900
6901 #define TC_IQD_UCAST   0
6902 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6903                                      unsigned int ucast_txqs)
6904 {
6905         unsigned int prio;
6906
6907         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6908          * qeth_iqd_select_queue() deals with this.
6909          * For unicast traffic, we defer the queue selection to the stack.
6910          * By installing a trivial prio map that spans over only the unicast
6911          * queues, we can encourage the stack to spread the ucast traffic evenly
6912          * without selecting the mcast queue.
6913          */
6914
6915         /* One traffic class, spanning over all active ucast queues: */
6916         netdev_set_num_tc(dev, 1);
6917         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6918                             QETH_IQD_MIN_UCAST_TXQ);
6919
6920         /* Map all priorities to this traffic class: */
6921         for (prio = 0; prio <= TC_BITMASK; prio++)
6922                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6923 }
6924
6925 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6926 {
6927         struct net_device *dev = card->dev;
6928         int rc;
6929
6930         /* Per netif_setup_tc(), adjust the mapping first: */
6931         if (IS_IQD(card))
6932                 qeth_iqd_set_prio_tc_map(dev, count - 1);
6933
6934         rc = netif_set_real_num_tx_queues(dev, count);
6935
6936         if (rc && IS_IQD(card))
6937                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
6938
6939         return rc;
6940 }
6941
6942 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6943                           u8 cast_type, struct net_device *sb_dev)
6944 {
6945         u16 txq;
6946
6947         if (cast_type != RTN_UNICAST)
6948                 return QETH_IQD_MCAST_TXQ;
6949         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
6950                 return QETH_IQD_MIN_UCAST_TXQ;
6951
6952         txq = netdev_pick_tx(dev, skb, sb_dev);
6953         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
6954 }
6955 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6956
6957 int qeth_open(struct net_device *dev)
6958 {
6959         struct qeth_card *card = dev->ml_priv;
6960
6961         QETH_CARD_TEXT(card, 4, "qethopen");
6962
6963         card->data.state = CH_STATE_UP;
6964         netif_tx_start_all_queues(dev);
6965
6966         napi_enable(&card->napi);
6967         local_bh_disable();
6968         napi_schedule(&card->napi);
6969         if (IS_IQD(card)) {
6970                 struct qeth_qdio_out_q *queue;
6971                 unsigned int i;
6972
6973                 qeth_for_each_output_queue(card, queue, i) {
6974                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
6975                                           QETH_NAPI_WEIGHT);
6976                         napi_enable(&queue->napi);
6977                         napi_schedule(&queue->napi);
6978                 }
6979         }
6980         /* kick-start the NAPI softirq: */
6981         local_bh_enable();
6982         return 0;
6983 }
6984 EXPORT_SYMBOL_GPL(qeth_open);
6985
6986 int qeth_stop(struct net_device *dev)
6987 {
6988         struct qeth_card *card = dev->ml_priv;
6989
6990         QETH_CARD_TEXT(card, 4, "qethstop");
6991         if (IS_IQD(card)) {
6992                 struct qeth_qdio_out_q *queue;
6993                 unsigned int i;
6994
6995                 /* Quiesce the NAPI instances: */
6996                 qeth_for_each_output_queue(card, queue, i)
6997                         napi_disable(&queue->napi);
6998
6999                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7000                 netif_tx_disable(dev);
7001
7002                 qeth_for_each_output_queue(card, queue, i) {
7003                         del_timer_sync(&queue->timer);
7004                         /* Queues may get re-allocated, so remove the NAPIs. */
7005                         netif_napi_del(&queue->napi);
7006                 }
7007         } else {
7008                 netif_tx_disable(dev);
7009         }
7010
7011         napi_disable(&card->napi);
7012         qdio_stop_irq(CARD_DDEV(card));
7013
7014         return 0;
7015 }
7016 EXPORT_SYMBOL_GPL(qeth_stop);
7017
7018 static int __init qeth_core_init(void)
7019 {
7020         int rc;
7021
7022         pr_info("loading core functions\n");
7023
7024         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7025
7026         rc = qeth_register_dbf_views();
7027         if (rc)
7028                 goto dbf_err;
7029         qeth_core_root_dev = root_device_register("qeth");
7030         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7031         if (rc)
7032                 goto register_err;
7033         qeth_core_header_cache =
7034                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7035                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7036                                   0, NULL);
7037         if (!qeth_core_header_cache) {
7038                 rc = -ENOMEM;
7039                 goto slab_err;
7040         }
7041         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7042                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7043         if (!qeth_qdio_outbuf_cache) {
7044                 rc = -ENOMEM;
7045                 goto cqslab_err;
7046         }
7047         rc = ccw_driver_register(&qeth_ccw_driver);
7048         if (rc)
7049                 goto ccw_err;
7050         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7051         if (rc)
7052                 goto ccwgroup_err;
7053
7054         return 0;
7055
7056 ccwgroup_err:
7057         ccw_driver_unregister(&qeth_ccw_driver);
7058 ccw_err:
7059         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7060 cqslab_err:
7061         kmem_cache_destroy(qeth_core_header_cache);
7062 slab_err:
7063         root_device_unregister(qeth_core_root_dev);
7064 register_err:
7065         qeth_unregister_dbf_views();
7066 dbf_err:
7067         debugfs_remove_recursive(qeth_debugfs_root);
7068         pr_err("Initializing the qeth device driver failed\n");
7069         return rc;
7070 }
7071
7072 static void __exit qeth_core_exit(void)
7073 {
7074         qeth_clear_dbf_list();
7075         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7076         ccw_driver_unregister(&qeth_ccw_driver);
7077         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7078         kmem_cache_destroy(qeth_core_header_cache);
7079         root_device_unregister(qeth_core_root_dev);
7080         qeth_unregister_dbf_views();
7081         debugfs_remove_recursive(qeth_debugfs_root);
7082         pr_info("core functions removed\n");
7083 }
7084
7085 module_init(qeth_core_init);
7086 module_exit(qeth_core_exit);
7087 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7088 MODULE_DESCRIPTION("qeth core functions");
7089 MODULE_LICENSE("GPL");