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/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 struct kmem_cache *qeth_core_header_cache;
  61 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  62 static struct kmem_cache *qeth_qdio_outbuf_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  74                 struct qeth_qdio_out_buffer *buf,
  75                 enum iucv_tx_notify notification);
  76
  77 static void qeth_close_dev_handler(struct work_struct *work)
  78 {
  79         struct qeth_card *card;
  80
  81         card = container_of(work, struct qeth_card, close_dev_work);
  82         QETH_CARD_TEXT(card, 2, "cldevhdl");
  83         ccwgroup_set_offline(card->gdev);
  84 }
  85
  86 static const char *qeth_get_cardname(struct qeth_card *card)
  87 {
  88         if (IS_VM_NIC(card)) {
  89                 switch (card->info.type) {
  90                 case QETH_CARD_TYPE_OSD:
  91                         return " Virtual NIC QDIO";
  92                 case QETH_CARD_TYPE_IQD:
  93                         return " Virtual NIC Hiper";
  94                 case QETH_CARD_TYPE_OSM:
  95                         return " Virtual NIC QDIO - OSM";
  96                 case QETH_CARD_TYPE_OSX:
  97                         return " Virtual NIC QDIO - OSX";
  98                 default:
  99                         return " unknown";
 100                 }
 101         } else {
 102                 switch (card->info.type) {
 103                 case QETH_CARD_TYPE_OSD:
 104                         return " OSD Express";
 105                 case QETH_CARD_TYPE_IQD:
 106                         return " HiperSockets";
 107                 case QETH_CARD_TYPE_OSN:
 108                         return " OSN QDIO";
 109                 case QETH_CARD_TYPE_OSM:
 110                         return " OSM QDIO";
 111                 case QETH_CARD_TYPE_OSX:
 112                         return " OSX QDIO";
 113                 default:
 114                         return " unknown";
 115                 }
 116         }
 117         return " n/a";
 118 }
 119
 120 /* max length to be returned: 14 */
 121 const char *qeth_get_cardname_short(struct qeth_card *card)
 122 {
 123         if (IS_VM_NIC(card)) {
 124                 switch (card->info.type) {
 125                 case QETH_CARD_TYPE_OSD:
 126                         return "Virt.NIC QDIO";
 127                 case QETH_CARD_TYPE_IQD:
 128                         return "Virt.NIC Hiper";
 129                 case QETH_CARD_TYPE_OSM:
 130                         return "Virt.NIC OSM";
 131                 case QETH_CARD_TYPE_OSX:
 132                         return "Virt.NIC OSX";
 133                 default:
 134                         return "unknown";
 135                 }
 136         } else {
 137                 switch (card->info.type) {
 138                 case QETH_CARD_TYPE_OSD:
 139                         switch (card->info.link_type) {
 140                         case QETH_LINK_TYPE_FAST_ETH:
 141                                 return "OSD_100";
 142                         case QETH_LINK_TYPE_HSTR:
 143                                 return "HSTR";
 144                         case QETH_LINK_TYPE_GBIT_ETH:
 145                                 return "OSD_1000";
 146                         case QETH_LINK_TYPE_10GBIT_ETH:
 147                                 return "OSD_10GIG";
 148                         case QETH_LINK_TYPE_25GBIT_ETH:
 149                                 return "OSD_25GIG";
 150                         case QETH_LINK_TYPE_LANE_ETH100:
 151                                 return "OSD_FE_LANE";
 152                         case QETH_LINK_TYPE_LANE_TR:
 153                                 return "OSD_TR_LANE";
 154                         case QETH_LINK_TYPE_LANE_ETH1000:
 155                                 return "OSD_GbE_LANE";
 156                         case QETH_LINK_TYPE_LANE:
 157                                 return "OSD_ATM_LANE";
 158                         default:
 159                                 return "OSD_Express";
 160                         }
 161                 case QETH_CARD_TYPE_IQD:
 162                         return "HiperSockets";
 163                 case QETH_CARD_TYPE_OSN:
 164                         return "OSN";
 165                 case QETH_CARD_TYPE_OSM:
 166                         return "OSM_1000";
 167                 case QETH_CARD_TYPE_OSX:
 168                         return "OSX_10GIG";
 169                 default:
 170                         return "unknown";
 171                 }
 172         }
 173         return "n/a";
 174 }
 175
 176 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 177                          int clear_start_mask)
 178 {
 179         unsigned long flags;
 180
 181         spin_lock_irqsave(&card->thread_mask_lock, flags);
 182         card->thread_allowed_mask = threads;
 183         if (clear_start_mask)
 184                 card->thread_start_mask &= threads;
 185         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 186         wake_up(&card->wait_q);
 187 }
 188 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 189
 190 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 191 {
 192         unsigned long flags;
 193         int rc = 0;
 194
 195         spin_lock_irqsave(&card->thread_mask_lock, flags);
 196         rc = (card->thread_running_mask & threads);
 197         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 198         return rc;
 199 }
 200 EXPORT_SYMBOL_GPL(qeth_threads_running);
 201
 202 static void qeth_clear_working_pool_list(struct qeth_card *card)
 203 {
 204         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 205         struct qeth_qdio_q *queue = card->qdio.in_q;
 206         unsigned int i;
 207
 208         QETH_CARD_TEXT(card, 5, "clwrklst");
 209         list_for_each_entry_safe(pool_entry, tmp,
 210                                  &card->qdio.in_buf_pool.entry_list, list)
 211                 list_del(&pool_entry->list);
 212
 213         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 214                 queue->bufs[i].pool_entry = NULL;
 215 }
 216
 217 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 218 {
 219         unsigned int i;
 220
 221         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 222                 if (entry->elements[i])
 223                         __free_page(entry->elements[i]);
 224         }
 225
 226         kfree(entry);
 227 }
 228
 229 static void qeth_free_buffer_pool(struct qeth_card *card)
 230 {
 231         struct qeth_buffer_pool_entry *entry, *tmp;
 232
 233         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 234                                  init_list) {
 235                 list_del(&entry->init_list);
 236                 qeth_free_pool_entry(entry);
 237         }
 238 }
 239
 240 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 241 {
 242         struct qeth_buffer_pool_entry *entry;
 243         unsigned int i;
 244
 245         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 246         if (!entry)
 247                 return NULL;
 248
 249         for (i = 0; i < pages; i++) {
 250                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 251
 252                 if (!entry->elements[i]) {
 253                         qeth_free_pool_entry(entry);
 254                         return NULL;
 255                 }
 256         }
 257
 258         return entry;
 259 }
 260
 261 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 262 {
 263         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 264         unsigned int i;
 265
 266         QETH_CARD_TEXT(card, 5, "alocpool");
 267         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 268                 struct qeth_buffer_pool_entry *entry;
 269
 270                 entry = qeth_alloc_pool_entry(buf_elements);
 271                 if (!entry) {
 272                         qeth_free_buffer_pool(card);
 273                         return -ENOMEM;
 274                 }
 275
 276                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 277         }
 278         return 0;
 279 }
 280
 281 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 282 {
 283         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 284         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 285         struct qeth_buffer_pool_entry *entry, *tmp;
 286         int delta = count - pool->buf_count;
 287         LIST_HEAD(entries);
 288
 289         QETH_CARD_TEXT(card, 2, "realcbp");
 290
 291         /* Defer until queue is allocated: */
 292         if (!card->qdio.in_q)
 293                 goto out;
 294
 295         /* Remove entries from the pool: */
 296         while (delta < 0) {
 297                 entry = list_first_entry(&pool->entry_list,
 298                                          struct qeth_buffer_pool_entry,
 299                                          init_list);
 300                 list_del(&entry->init_list);
 301                 qeth_free_pool_entry(entry);
 302
 303                 delta++;
 304         }
 305
 306         /* Allocate additional entries: */
 307         while (delta > 0) {
 308                 entry = qeth_alloc_pool_entry(buf_elements);
 309                 if (!entry) {
 310                         list_for_each_entry_safe(entry, tmp, &entries,
 311                                                  init_list) {
 312                                 list_del(&entry->init_list);
 313                                 qeth_free_pool_entry(entry);
 314                         }
 315
 316                         return -ENOMEM;
 317                 }
 318
 319                 list_add(&entry->init_list, &entries);
 320
 321                 delta--;
 322         }
 323
 324         list_splice(&entries, &pool->entry_list);
 325
 326 out:
 327         card->qdio.in_buf_pool.buf_count = count;
 328         pool->buf_count = count;
 329         return 0;
 330 }
 331 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 332
 333 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 334 {
 335         if (!q)
 336                 return;
 337
 338         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 339         kfree(q);
 340 }
 341
 342 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 343 {
 344         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 345         int i;
 346
 347         if (!q)
 348                 return NULL;
 349
 350         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 351                 kfree(q);
 352                 return NULL;
 353         }
 354
 355         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 356                 q->bufs[i].buffer = q->qdio_bufs[i];
 357
 358         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 359         return q;
 360 }
 361
 362 static int qeth_cq_init(struct qeth_card *card)
 363 {
 364         int rc;
 365
 366         if (card->options.cq == QETH_CQ_ENABLED) {
 367                 QETH_CARD_TEXT(card, 2, "cqinit");
 368                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 369                                    QDIO_MAX_BUFFERS_PER_Q);
 370                 card->qdio.c_q->next_buf_to_init = 127;
 371                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 372                              card->qdio.no_in_queues - 1, 0,
 373                              127);
 374                 if (rc) {
 375                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 376                         goto out;
 377                 }
 378         }
 379         rc = 0;
 380 out:
 381         return rc;
 382 }
 383
 384 static int qeth_alloc_cq(struct qeth_card *card)
 385 {
 386         int rc;
 387
 388         if (card->options.cq == QETH_CQ_ENABLED) {
 389                 int i;
 390                 struct qdio_outbuf_state *outbuf_states;
 391
 392                 QETH_CARD_TEXT(card, 2, "cqon");
 393                 card->qdio.c_q = qeth_alloc_qdio_queue();
 394                 if (!card->qdio.c_q) {
 395                         rc = -1;
 396                         goto kmsg_out;
 397                 }
 398                 card->qdio.no_in_queues = 2;
 399                 card->qdio.out_bufstates =
 400                         kcalloc(card->qdio.no_out_queues *
 401                                         QDIO_MAX_BUFFERS_PER_Q,
 402                                 sizeof(struct qdio_outbuf_state),
 403                                 GFP_KERNEL);
 404                 outbuf_states = card->qdio.out_bufstates;
 405                 if (outbuf_states == NULL) {
 406                         rc = -1;
 407                         goto free_cq_out;
 408                 }
 409                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 410                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 411                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 412                 }
 413         } else {
 414                 QETH_CARD_TEXT(card, 2, "nocq");
 415                 card->qdio.c_q = NULL;
 416                 card->qdio.no_in_queues = 1;
 417         }
 418         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 419         rc = 0;
 420 out:
 421         return rc;
 422 free_cq_out:
 423         qeth_free_qdio_queue(card->qdio.c_q);
 424         card->qdio.c_q = NULL;
 425 kmsg_out:
 426         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 427         goto out;
 428 }
 429
 430 static void qeth_free_cq(struct qeth_card *card)
 431 {
 432         if (card->qdio.c_q) {
 433                 --card->qdio.no_in_queues;
 434                 qeth_free_qdio_queue(card->qdio.c_q);
 435                 card->qdio.c_q = NULL;
 436         }
 437         kfree(card->qdio.out_bufstates);
 438         card->qdio.out_bufstates = NULL;
 439 }
 440
 441 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 442                                                         int delayed)
 443 {
 444         enum iucv_tx_notify n;
 445
 446         switch (sbalf15) {
 447         case 0:
 448                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 449                 break;
 450         case 4:
 451         case 16:
 452         case 17:
 453         case 18:
 454                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 455                         TX_NOTIFY_UNREACHABLE;
 456                 break;
 457         default:
 458                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 459                         TX_NOTIFY_GENERALERROR;
 460                 break;
 461         }
 462
 463         return n;
 464 }
 465
 466 static void qeth_qdio_handle_aob(struct qeth_card *card,
 467                                  unsigned long phys_aob_addr)
 468 {
 469         enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
 470         struct qaob *aob;
 471         struct qeth_qdio_out_buffer *buffer;
 472         enum iucv_tx_notify notification;
 473         struct qeth_qdio_out_q *queue;
 474         unsigned int i;
 475
 476         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 477         QETH_CARD_TEXT(card, 5, "haob");
 478         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 479         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 480         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 481
 482         if (aob->aorc) {
 483                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 484                 new_state = QETH_QDIO_BUF_QAOB_ERROR;
 485         }
 486
 487         switch (atomic_xchg(&buffer->state, new_state)) {
 488         case QETH_QDIO_BUF_PRIMED:
 489                 /* Faster than TX completion code, let it handle the async
 490                  * completion for us.
 491                  */
 492                 break;
 493         case QETH_QDIO_BUF_PENDING:
 494                 /* TX completion code is active and will handle the async
 495                  * completion for us.
 496                  */
 497                 break;
 498         case QETH_QDIO_BUF_NEED_QAOB:
 499                 /* TX completion code is already finished. */
 500                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 501                 qeth_notify_skbs(buffer->q, buffer, notification);
 502
 503                 /* Free dangling allocations. The attached skbs are handled by
 504                  * qeth_tx_complete_pending_bufs().
 505                  */
 506                 for (i = 0;
 507                      i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 508                      i++) {
 509                         void *data = phys_to_virt(aob->sba[i]);
 510
 511                         if (data && buffer->is_header[i])
 512                                 kmem_cache_free(qeth_core_header_cache, data);
 513                         buffer->is_header[i] = 0;
 514                 }
 515
 516                 queue = buffer->q;
 517                 atomic_set(&buffer->state, QETH_QDIO_BUF_EMPTY);
 518                 napi_schedule(&queue->napi);
 519                 break;
 520         default:
 521                 WARN_ON_ONCE(1);
 522         }
 523
 524         qdio_release_aob(aob);
 525 }
 526
 527 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 528                            void *data)
 529 {
 530         ccw->cmd_code = cmd_code;
 531         ccw->flags = flags | CCW_FLAG_SLI;
 532         ccw->count = len;
 533         ccw->cda = (__u32) __pa(data);
 534 }
 535
 536 static int __qeth_issue_next_read(struct qeth_card *card)
 537 {
 538         struct qeth_cmd_buffer *iob = card->read_cmd;
 539         struct qeth_channel *channel = iob->channel;
 540         struct ccw1 *ccw = __ccw_from_cmd(iob);
 541         int rc;
 542
 543         QETH_CARD_TEXT(card, 5, "issnxrd");
 544         if (channel->state != CH_STATE_UP)
 545                 return -EIO;
 546
 547         memset(iob->data, 0, iob->length);
 548         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 549         iob->callback = qeth_issue_next_read_cb;
 550         /* keep the cmd alive after completion: */
 551         qeth_get_cmd(iob);
 552
 553         QETH_CARD_TEXT(card, 6, "noirqpnd");
 554         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 555         if (!rc) {
 556                 channel->active_cmd = iob;
 557         } else {
 558                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 559                                  rc, CARD_DEVID(card));
 560                 qeth_unlock_channel(card, channel);
 561                 qeth_put_cmd(iob);
 562                 card->read_or_write_problem = 1;
 563                 qeth_schedule_recovery(card);
 564         }
 565         return rc;
 566 }
 567
 568 static int qeth_issue_next_read(struct qeth_card *card)
 569 {
 570         int ret;
 571
 572         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 573         ret = __qeth_issue_next_read(card);
 574         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 575
 576         return ret;
 577 }
 578
 579 static void qeth_enqueue_cmd(struct qeth_card *card,
 580                              struct qeth_cmd_buffer *iob)
 581 {
 582         spin_lock_irq(&card->lock);
 583         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 584         spin_unlock_irq(&card->lock);
 585 }
 586
 587 static void qeth_dequeue_cmd(struct qeth_card *card,
 588                              struct qeth_cmd_buffer *iob)
 589 {
 590         spin_lock_irq(&card->lock);
 591         list_del(&iob->list_entry);
 592         spin_unlock_irq(&card->lock);
 593 }
 594
 595 void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 596 {
 597         iob->rc = reason;
 598         complete(&iob->done);
 599 }
 600 EXPORT_SYMBOL_GPL(qeth_notify_cmd);
 601
 602 static void qeth_flush_local_addrs4(struct qeth_card *card)
 603 {
 604         struct qeth_local_addr *addr;
 605         struct hlist_node *tmp;
 606         unsigned int i;
 607
 608         spin_lock_irq(&card->local_addrs4_lock);
 609         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 610                 hash_del_rcu(&addr->hnode);
 611                 kfree_rcu(addr, rcu);
 612         }
 613         spin_unlock_irq(&card->local_addrs4_lock);
 614 }
 615
 616 static void qeth_flush_local_addrs6(struct qeth_card *card)
 617 {
 618         struct qeth_local_addr *addr;
 619         struct hlist_node *tmp;
 620         unsigned int i;
 621
 622         spin_lock_irq(&card->local_addrs6_lock);
 623         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 624                 hash_del_rcu(&addr->hnode);
 625                 kfree_rcu(addr, rcu);
 626         }
 627         spin_unlock_irq(&card->local_addrs6_lock);
 628 }
 629
 630 static void qeth_flush_local_addrs(struct qeth_card *card)
 631 {
 632         qeth_flush_local_addrs4(card);
 633         qeth_flush_local_addrs6(card);
 634 }
 635
 636 static void qeth_add_local_addrs4(struct qeth_card *card,
 637                                   struct qeth_ipacmd_local_addrs4 *cmd)
 638 {
 639         unsigned int i;
 640
 641         if (cmd->addr_length !=
 642             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 643                 dev_err_ratelimited(&card->gdev->dev,
 644                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 645                                     cmd->addr_length);
 646                 return;
 647         }
 648
 649         spin_lock(&card->local_addrs4_lock);
 650         for (i = 0; i < cmd->count; i++) {
 651                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 652                 struct qeth_local_addr *addr;
 653                 bool duplicate = false;
 654
 655                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 656                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 657                                 duplicate = true;
 658                                 break;
 659                         }
 660                 }
 661
 662                 if (duplicate)
 663                         continue;
 664
 665                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 666                 if (!addr) {
 667                         dev_err(&card->gdev->dev,
 668                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 669                                 &cmd->addrs[i].addr);
 670                         continue;
 671                 }
 672
 673                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 674                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 675         }
 676         spin_unlock(&card->local_addrs4_lock);
 677 }
 678
 679 static void qeth_add_local_addrs6(struct qeth_card *card,
 680                                   struct qeth_ipacmd_local_addrs6 *cmd)
 681 {
 682         unsigned int i;
 683
 684         if (cmd->addr_length !=
 685             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 686                 dev_err_ratelimited(&card->gdev->dev,
 687                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 688                                     cmd->addr_length);
 689                 return;
 690         }
 691
 692         spin_lock(&card->local_addrs6_lock);
 693         for (i = 0; i < cmd->count; i++) {
 694                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 695                 struct qeth_local_addr *addr;
 696                 bool duplicate = false;
 697
 698                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 699                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 700                                 duplicate = true;
 701                                 break;
 702                         }
 703                 }
 704
 705                 if (duplicate)
 706                         continue;
 707
 708                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 709                 if (!addr) {
 710                         dev_err(&card->gdev->dev,
 711                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 712                                 &cmd->addrs[i].addr);
 713                         continue;
 714                 }
 715
 716                 addr->addr = cmd->addrs[i].addr;
 717                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 718         }
 719         spin_unlock(&card->local_addrs6_lock);
 720 }
 721
 722 static void qeth_del_local_addrs4(struct qeth_card *card,
 723                                   struct qeth_ipacmd_local_addrs4 *cmd)
 724 {
 725         unsigned int i;
 726
 727         if (cmd->addr_length !=
 728             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 729                 dev_err_ratelimited(&card->gdev->dev,
 730                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 731                                     cmd->addr_length);
 732                 return;
 733         }
 734
 735         spin_lock(&card->local_addrs4_lock);
 736         for (i = 0; i < cmd->count; i++) {
 737                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 738                 unsigned int key = ipv4_addr_hash(addr->addr);
 739                 struct qeth_local_addr *tmp;
 740
 741                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 742                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 743                                 hash_del_rcu(&tmp->hnode);
 744                                 kfree_rcu(tmp, rcu);
 745                                 break;
 746                         }
 747                 }
 748         }
 749         spin_unlock(&card->local_addrs4_lock);
 750 }
 751
 752 static void qeth_del_local_addrs6(struct qeth_card *card,
 753                                   struct qeth_ipacmd_local_addrs6 *cmd)
 754 {
 755         unsigned int i;
 756
 757         if (cmd->addr_length !=
 758             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 759                 dev_err_ratelimited(&card->gdev->dev,
 760                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 761                                     cmd->addr_length);
 762                 return;
 763         }
 764
 765         spin_lock(&card->local_addrs6_lock);
 766         for (i = 0; i < cmd->count; i++) {
 767                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 768                 u32 key = ipv6_addr_hash(&addr->addr);
 769                 struct qeth_local_addr *tmp;
 770
 771                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 772                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 773                                 hash_del_rcu(&tmp->hnode);
 774                                 kfree_rcu(tmp, rcu);
 775                                 break;
 776                         }
 777                 }
 778         }
 779         spin_unlock(&card->local_addrs6_lock);
 780 }
 781
 782 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 783                                       struct sk_buff *skb)
 784 {
 785         struct qeth_local_addr *tmp;
 786         bool is_local = false;
 787         unsigned int key;
 788         __be32 next_hop;
 789
 790         if (hash_empty(card->local_addrs4))
 791                 return false;
 792
 793         rcu_read_lock();
 794         next_hop = qeth_next_hop_v4_rcu(skb,
 795                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 796         key = ipv4_addr_hash(next_hop);
 797
 798         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 799                 if (tmp->addr.s6_addr32[3] == next_hop) {
 800                         is_local = true;
 801                         break;
 802                 }
 803         }
 804         rcu_read_unlock();
 805
 806         return is_local;
 807 }
 808
 809 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 810                                       struct sk_buff *skb)
 811 {
 812         struct qeth_local_addr *tmp;
 813         struct in6_addr *next_hop;
 814         bool is_local = false;
 815         u32 key;
 816
 817         if (hash_empty(card->local_addrs6))
 818                 return false;
 819
 820         rcu_read_lock();
 821         next_hop = qeth_next_hop_v6_rcu(skb,
 822                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 823         key = ipv6_addr_hash(next_hop);
 824
 825         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 826                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 827                         is_local = true;
 828                         break;
 829                 }
 830         }
 831         rcu_read_unlock();
 832
 833         return is_local;
 834 }
 835
 836 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 837 {
 838         struct qeth_card *card = m->private;
 839         struct qeth_local_addr *tmp;
 840         unsigned int i;
 841
 842         rcu_read_lock();
 843         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 844                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 845         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 846                 seq_printf(m, "%pI6c\n", &tmp->addr);
 847         rcu_read_unlock();
 848
 849         return 0;
 850 }
 851
 852 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 853
 854 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 855                 struct qeth_card *card)
 856 {
 857         const char *ipa_name;
 858         int com = cmd->hdr.command;
 859
 860         ipa_name = qeth_get_ipa_cmd_name(com);
 861
 862         if (rc)
 863                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 864                                  ipa_name, com, CARD_DEVID(card), rc,
 865                                  qeth_get_ipa_msg(rc));
 866         else
 867                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 868                                  ipa_name, com, CARD_DEVID(card));
 869 }
 870
 871 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 872                                                 struct qeth_ipa_cmd *cmd)
 873 {
 874         QETH_CARD_TEXT(card, 5, "chkipad");
 875
 876         if (IS_IPA_REPLY(cmd)) {
 877                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 878                     cmd->hdr.command != IPA_CMD_DELCCID &&
 879                     cmd->hdr.command != IPA_CMD_MODCCID &&
 880                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 881                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 882                 return cmd;
 883         }
 884
 885         /* handle unsolicited event: */
 886         switch (cmd->hdr.command) {
 887         case IPA_CMD_STOPLAN:
 888                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 889                         dev_err(&card->gdev->dev,
 890                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 891                                 netdev_name(card->dev));
 892                         schedule_work(&card->close_dev_work);
 893                 } else {
 894                         dev_warn(&card->gdev->dev,
 895                                  "The link for interface %s on CHPID 0x%X failed\n",
 896                                  netdev_name(card->dev), card->info.chpid);
 897                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 898                         netif_carrier_off(card->dev);
 899                 }
 900                 return NULL;
 901         case IPA_CMD_STARTLAN:
 902                 dev_info(&card->gdev->dev,
 903                          "The link for %s on CHPID 0x%X has been restored\n",
 904                          netdev_name(card->dev), card->info.chpid);
 905                 if (card->info.hwtrap)
 906                         card->info.hwtrap = 2;
 907                 qeth_schedule_recovery(card);
 908                 return NULL;
 909         case IPA_CMD_SETBRIDGEPORT_IQD:
 910         case IPA_CMD_SETBRIDGEPORT_OSA:
 911         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 912                 if (card->discipline->control_event_handler(card, cmd))
 913                         return cmd;
 914                 return NULL;
 915         case IPA_CMD_MODCCID:
 916                 return cmd;
 917         case IPA_CMD_REGISTER_LOCAL_ADDR:
 918                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 919                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 920                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 921                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 922
 923                 QETH_CARD_TEXT(card, 3, "irla");
 924                 return NULL;
 925         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 926                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 927                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 928                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 929                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 930
 931                 QETH_CARD_TEXT(card, 3, "urla");
 932                 return NULL;
 933         default:
 934                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 935                 return cmd;
 936         }
 937 }
 938
 939 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 940 {
 941         struct qeth_cmd_buffer *iob;
 942         unsigned long flags;
 943
 944         QETH_CARD_TEXT(card, 4, "clipalst");
 945
 946         spin_lock_irqsave(&card->lock, flags);
 947         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 948                 qeth_notify_cmd(iob, -ECANCELED);
 949         spin_unlock_irqrestore(&card->lock, flags);
 950 }
 951
 952 static int qeth_check_idx_response(struct qeth_card *card,
 953         unsigned char *buffer)
 954 {
 955         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 956         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 957                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 958                                  buffer[4]);
 959                 QETH_CARD_TEXT(card, 2, "ckidxres");
 960                 QETH_CARD_TEXT(card, 2, " idxterm");
 961                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 962                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 963                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 964                         dev_err(&card->gdev->dev,
 965                                 "The device does not support the configured transport mode\n");
 966                         return -EPROTONOSUPPORT;
 967                 }
 968                 return -EIO;
 969         }
 970         return 0;
 971 }
 972
 973 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 974 {
 975         if (refcount_dec_and_test(&iob->ref_count)) {
 976                 kfree(iob->data);
 977                 kfree(iob);
 978         }
 979 }
 980 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 981
 982 static void qeth_release_buffer_cb(struct qeth_card *card,
 983                                    struct qeth_cmd_buffer *iob,
 984                                    unsigned int data_length)
 985 {
 986         qeth_put_cmd(iob);
 987 }
 988
 989 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 990 {
 991         qeth_notify_cmd(iob, rc);
 992         qeth_put_cmd(iob);
 993 }
 994
 995 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 996                                        unsigned int length, unsigned int ccws,
 997                                        long timeout)
 998 {
 999         struct qeth_cmd_buffer *iob;
1000
1001         if (length > QETH_BUFSIZE)
1002                 return NULL;
1003
1004         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
1005         if (!iob)
1006                 return NULL;
1007
1008         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
1009                             GFP_KERNEL | GFP_DMA);
1010         if (!iob->data) {
1011                 kfree(iob);
1012                 return NULL;
1013         }
1014
1015         init_completion(&iob->done);
1016         spin_lock_init(&iob->lock);
1017         refcount_set(&iob->ref_count, 1);
1018         iob->channel = channel;
1019         iob->timeout = timeout;
1020         iob->length = length;
1021         return iob;
1022 }
1023 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
1024
1025 static void qeth_issue_next_read_cb(struct qeth_card *card,
1026                                     struct qeth_cmd_buffer *iob,
1027                                     unsigned int data_length)
1028 {
1029         struct qeth_cmd_buffer *request = NULL;
1030         struct qeth_ipa_cmd *cmd = NULL;
1031         struct qeth_reply *reply = NULL;
1032         struct qeth_cmd_buffer *tmp;
1033         unsigned long flags;
1034         int rc = 0;
1035
1036         QETH_CARD_TEXT(card, 4, "sndctlcb");
1037         rc = qeth_check_idx_response(card, iob->data);
1038         switch (rc) {
1039         case 0:
1040                 break;
1041         case -EIO:
1042                 qeth_schedule_recovery(card);
1043                 fallthrough;
1044         default:
1045                 qeth_clear_ipacmd_list(card);
1046                 goto err_idx;
1047         }
1048
1049         cmd = __ipa_reply(iob);
1050         if (cmd) {
1051                 cmd = qeth_check_ipa_data(card, cmd);
1052                 if (!cmd)
1053                         goto out;
1054                 if (IS_OSN(card) && card->osn_info.assist_cb &&
1055                     cmd->hdr.command != IPA_CMD_STARTLAN) {
1056                         card->osn_info.assist_cb(card->dev, cmd);
1057                         goto out;
1058                 }
1059         }
1060
1061         /* match against pending cmd requests */
1062         spin_lock_irqsave(&card->lock, flags);
1063         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
1064                 if (tmp->match && tmp->match(tmp, iob)) {
1065                         request = tmp;
1066                         /* take the object outside the lock */
1067                         qeth_get_cmd(request);
1068                         break;
1069                 }
1070         }
1071         spin_unlock_irqrestore(&card->lock, flags);
1072
1073         if (!request)
1074                 goto out;
1075
1076         reply = &request->reply;
1077         if (!reply->callback) {
1078                 rc = 0;
1079                 goto no_callback;
1080         }
1081
1082         spin_lock_irqsave(&request->lock, flags);
1083         if (request->rc)
1084                 /* Bail out when the requestor has already left: */
1085                 rc = request->rc;
1086         else
1087                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1088                                                         (unsigned long)iob);
1089         spin_unlock_irqrestore(&request->lock, flags);
1090
1091 no_callback:
1092         if (rc <= 0)
1093                 qeth_notify_cmd(request, rc);
1094         qeth_put_cmd(request);
1095 out:
1096         memcpy(&card->seqno.pdu_hdr_ack,
1097                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1098                 QETH_SEQ_NO_LENGTH);
1099         __qeth_issue_next_read(card);
1100 err_idx:
1101         qeth_put_cmd(iob);
1102 }
1103
1104 static int qeth_set_thread_start_bit(struct qeth_card *card,
1105                 unsigned long thread)
1106 {
1107         unsigned long flags;
1108         int rc = 0;
1109
1110         spin_lock_irqsave(&card->thread_mask_lock, flags);
1111         if (!(card->thread_allowed_mask & thread))
1112                 rc = -EPERM;
1113         else if (card->thread_start_mask & thread)
1114                 rc = -EBUSY;
1115         else
1116                 card->thread_start_mask |= thread;
1117         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1118
1119         return rc;
1120 }
1121
1122 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1123                                         unsigned long thread)
1124 {
1125         unsigned long flags;
1126
1127         spin_lock_irqsave(&card->thread_mask_lock, flags);
1128         card->thread_start_mask &= ~thread;
1129         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1130         wake_up(&card->wait_q);
1131 }
1132
1133 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1134                                           unsigned long thread)
1135 {
1136         unsigned long flags;
1137
1138         spin_lock_irqsave(&card->thread_mask_lock, flags);
1139         card->thread_running_mask &= ~thread;
1140         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1141         wake_up_all(&card->wait_q);
1142 }
1143
1144 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1145 {
1146         unsigned long flags;
1147         int rc = 0;
1148
1149         spin_lock_irqsave(&card->thread_mask_lock, flags);
1150         if (card->thread_start_mask & thread) {
1151                 if ((card->thread_allowed_mask & thread) &&
1152                     !(card->thread_running_mask & thread)) {
1153                         rc = 1;
1154                         card->thread_start_mask &= ~thread;
1155                         card->thread_running_mask |= thread;
1156                 } else
1157                         rc = -EPERM;
1158         }
1159         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1160         return rc;
1161 }
1162
1163 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1164 {
1165         int rc = 0;
1166
1167         wait_event(card->wait_q,
1168                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1169         return rc;
1170 }
1171
1172 int qeth_schedule_recovery(struct qeth_card *card)
1173 {
1174         int rc;
1175
1176         QETH_CARD_TEXT(card, 2, "startrec");
1177
1178         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1179         if (!rc)
1180                 schedule_work(&card->kernel_thread_starter);
1181
1182         return rc;
1183 }
1184
1185 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1186                             struct irb *irb)
1187 {
1188         int dstat, cstat;
1189         char *sense;
1190
1191         sense = (char *) irb->ecw;
1192         cstat = irb->scsw.cmd.cstat;
1193         dstat = irb->scsw.cmd.dstat;
1194
1195         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1196                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1197                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1198                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1199                 dev_warn(&cdev->dev, "The qeth device driver "
1200                         "failed to recover an error on the device\n");
1201                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1202                                  CCW_DEVID(cdev), dstat, cstat);
1203                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1204                                 16, 1, irb, 64, 1);
1205                 return -EIO;
1206         }
1207
1208         if (dstat & DEV_STAT_UNIT_CHECK) {
1209                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1210                     SENSE_RESETTING_EVENT_FLAG) {
1211                         QETH_CARD_TEXT(card, 2, "REVIND");
1212                         return -EIO;
1213                 }
1214                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1215                     SENSE_COMMAND_REJECT_FLAG) {
1216                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1217                         return -EIO;
1218                 }
1219                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1220                         QETH_CARD_TEXT(card, 2, "AFFE");
1221                         return -EIO;
1222                 }
1223                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1224                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1225                         return 0;
1226                 }
1227                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1228                 return -EIO;
1229         }
1230         return 0;
1231 }
1232
1233 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1234                                 struct irb *irb)
1235 {
1236         if (!IS_ERR(irb))
1237                 return 0;
1238
1239         switch (PTR_ERR(irb)) {
1240         case -EIO:
1241                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1242                                  CCW_DEVID(cdev));
1243                 QETH_CARD_TEXT(card, 2, "ckirberr");
1244                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1245                 return -EIO;
1246         case -ETIMEDOUT:
1247                 dev_warn(&cdev->dev, "A hardware operation timed out"
1248                         " on the device\n");
1249                 QETH_CARD_TEXT(card, 2, "ckirberr");
1250                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1251                 return -ETIMEDOUT;
1252         default:
1253                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1254                                  PTR_ERR(irb), CCW_DEVID(cdev));
1255                 QETH_CARD_TEXT(card, 2, "ckirberr");
1256                 QETH_CARD_TEXT(card, 2, "  rc???");
1257                 return PTR_ERR(irb);
1258         }
1259 }
1260
1261 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1262                 struct irb *irb)
1263 {
1264         int rc;
1265         int cstat, dstat;
1266         struct qeth_cmd_buffer *iob = NULL;
1267         struct ccwgroup_device *gdev;
1268         struct qeth_channel *channel;
1269         struct qeth_card *card;
1270
1271         /* while we hold the ccwdev lock, this stays valid: */
1272         gdev = dev_get_drvdata(&cdev->dev);
1273         card = dev_get_drvdata(&gdev->dev);
1274
1275         QETH_CARD_TEXT(card, 5, "irq");
1276
1277         if (card->read.ccwdev == cdev) {
1278                 channel = &card->read;
1279                 QETH_CARD_TEXT(card, 5, "read");
1280         } else if (card->write.ccwdev == cdev) {
1281                 channel = &card->write;
1282                 QETH_CARD_TEXT(card, 5, "write");
1283         } else {
1284                 channel = &card->data;
1285                 QETH_CARD_TEXT(card, 5, "data");
1286         }
1287
1288         if (intparm == 0) {
1289                 QETH_CARD_TEXT(card, 5, "irqunsol");
1290         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1291                 QETH_CARD_TEXT(card, 5, "irqunexp");
1292
1293                 dev_err(&cdev->dev,
1294                         "Received IRQ with intparm %lx, expected %px\n",
1295                         intparm, channel->active_cmd);
1296                 if (channel->active_cmd)
1297                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1298         } else {
1299                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1300         }
1301
1302         channel->active_cmd = NULL;
1303         qeth_unlock_channel(card, channel);
1304
1305         rc = qeth_check_irb_error(card, cdev, irb);
1306         if (rc) {
1307                 /* IO was terminated, free its resources. */
1308                 if (iob)
1309                         qeth_cancel_cmd(iob, rc);
1310                 return;
1311         }
1312
1313         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1314                 channel->state = CH_STATE_STOPPED;
1315                 wake_up(&card->wait_q);
1316         }
1317
1318         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1319                 channel->state = CH_STATE_HALTED;
1320                 wake_up(&card->wait_q);
1321         }
1322
1323         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1324                                           SCSW_FCTL_HALT_FUNC))) {
1325                 qeth_cancel_cmd(iob, -ECANCELED);
1326                 iob = NULL;
1327         }
1328
1329         cstat = irb->scsw.cmd.cstat;
1330         dstat = irb->scsw.cmd.dstat;
1331
1332         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1333             (dstat & DEV_STAT_UNIT_CHECK) ||
1334             (cstat)) {
1335                 if (irb->esw.esw0.erw.cons) {
1336                         dev_warn(&channel->ccwdev->dev,
1337                                 "The qeth device driver failed to recover "
1338                                 "an error on the device\n");
1339                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1340                                          CCW_DEVID(channel->ccwdev), cstat,
1341                                          dstat);
1342                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1343                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1344                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1345                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1346                 }
1347
1348                 rc = qeth_get_problem(card, cdev, irb);
1349                 if (rc) {
1350                         card->read_or_write_problem = 1;
1351                         if (iob)
1352                                 qeth_cancel_cmd(iob, rc);
1353                         qeth_clear_ipacmd_list(card);
1354                         qeth_schedule_recovery(card);
1355                         return;
1356                 }
1357         }
1358
1359         if (iob) {
1360                 /* sanity check: */
1361                 if (irb->scsw.cmd.count > iob->length) {
1362                         qeth_cancel_cmd(iob, -EIO);
1363                         return;
1364                 }
1365                 if (iob->callback)
1366                         iob->callback(card, iob,
1367                                       iob->length - irb->scsw.cmd.count);
1368         }
1369 }
1370
1371 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1372                 struct qeth_qdio_out_buffer *buf,
1373                 enum iucv_tx_notify notification)
1374 {
1375         struct sk_buff *skb;
1376
1377         skb_queue_walk(&buf->skb_list, skb) {
1378                 struct sock *sk = skb->sk;
1379
1380                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1381                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1382                 if (sk && sk->sk_family == PF_IUCV)
1383                         iucv_sk(sk)->sk_txnotify(sk, notification);
1384         }
1385 }
1386
1387 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
1388                                  int budget)
1389 {
1390         struct qeth_qdio_out_q *queue = buf->q;
1391         struct sk_buff *skb;
1392
1393         /* Empty buffer? */
1394         if (buf->next_element_to_fill == 0)
1395                 return;
1396
1397         QETH_TXQ_STAT_INC(queue, bufs);
1398         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1399         if (error) {
1400                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1401         } else {
1402                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1403                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1404         }
1405
1406         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1407                 unsigned int bytes = qdisc_pkt_len(skb);
1408                 bool is_tso = skb_is_gso(skb);
1409                 unsigned int packets;
1410
1411                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1412                 if (!error) {
1413                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1414                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1415                         if (skb_is_nonlinear(skb))
1416                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1417                         if (is_tso) {
1418                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1419                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1420                         }
1421                 }
1422
1423                 napi_consume_skb(skb, budget);
1424         }
1425 }
1426
1427 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1428                                      struct qeth_qdio_out_buffer *buf,
1429                                      bool error, int budget)
1430 {
1431         int i;
1432
1433         /* is PCI flag set on buffer? */
1434         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1435                 atomic_dec(&queue->set_pci_flags_count);
1436
1437         qeth_tx_complete_buf(buf, error, budget);
1438
1439         for (i = 0; i < queue->max_elements; ++i) {
1440                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1441
1442                 if (data && buf->is_header[i])
1443                         kmem_cache_free(qeth_core_header_cache, data);
1444                 buf->is_header[i] = 0;
1445         }
1446
1447         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1448         buf->next_element_to_fill = 0;
1449         buf->frames = 0;
1450         buf->bytes = 0;
1451         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1452 }
1453
1454 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1455                                           struct qeth_qdio_out_q *queue,
1456                                           bool drain)
1457 {
1458         struct qeth_qdio_out_buffer *buf, *tmp;
1459
1460         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1461                 if (drain || atomic_read(&buf->state) == QETH_QDIO_BUF_EMPTY) {
1462                         QETH_CARD_TEXT(card, 5, "fp");
1463                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1464
1465                         if (drain)
1466                                 qeth_notify_skbs(queue, buf,
1467                                                  TX_NOTIFY_GENERALERROR);
1468                         qeth_tx_complete_buf(buf, drain, 0);
1469
1470                         list_del(&buf->list_entry);
1471                         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1472                 }
1473         }
1474 }
1475
1476 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1477 {
1478         int j;
1479
1480         qeth_tx_complete_pending_bufs(q->card, q, true);
1481
1482         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1483                 if (!q->bufs[j])
1484                         continue;
1485
1486                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1487                 if (free) {
1488                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1489                         q->bufs[j] = NULL;
1490                 }
1491         }
1492 }
1493
1494 static void qeth_drain_output_queues(struct qeth_card *card)
1495 {
1496         int i;
1497
1498         QETH_CARD_TEXT(card, 2, "clearqdbf");
1499         /* clear outbound buffers to free skbs */
1500         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1501                 if (card->qdio.out_qs[i])
1502                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1503         }
1504 }
1505
1506 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1507 {
1508         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1509
1510         if (card->qdio.no_out_queues == max)
1511                 return;
1512
1513         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1514                 qeth_free_qdio_queues(card);
1515
1516         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1517                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1518
1519         card->qdio.no_out_queues = max;
1520 }
1521
1522 static int qeth_update_from_chp_desc(struct qeth_card *card)
1523 {
1524         struct ccw_device *ccwdev;
1525         struct channel_path_desc_fmt0 *chp_dsc;
1526
1527         QETH_CARD_TEXT(card, 2, "chp_desc");
1528
1529         ccwdev = card->data.ccwdev;
1530         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1531         if (!chp_dsc)
1532                 return -ENOMEM;
1533
1534         card->info.func_level = 0x4100 + chp_dsc->desc;
1535
1536         if (IS_OSD(card) || IS_OSX(card))
1537                 /* CHPP field bit 6 == 1 -> single queue */
1538                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1539
1540         kfree(chp_dsc);
1541         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1542         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1543         return 0;
1544 }
1545
1546 static void qeth_init_qdio_info(struct qeth_card *card)
1547 {
1548         QETH_CARD_TEXT(card, 4, "intqdinf");
1549         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1550         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1551         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1552
1553         /* inbound */
1554         card->qdio.no_in_queues = 1;
1555         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1556         if (IS_IQD(card))
1557                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1558         else
1559                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1560         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1561         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1562         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1563 }
1564
1565 static void qeth_set_initial_options(struct qeth_card *card)
1566 {
1567         card->options.route4.type = NO_ROUTER;
1568         card->options.route6.type = NO_ROUTER;
1569         card->options.isolation = ISOLATION_MODE_NONE;
1570         card->options.cq = QETH_CQ_DISABLED;
1571         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1572 }
1573
1574 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1575 {
1576         unsigned long flags;
1577         int rc = 0;
1578
1579         spin_lock_irqsave(&card->thread_mask_lock, flags);
1580         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1581                         (u8) card->thread_start_mask,
1582                         (u8) card->thread_allowed_mask,
1583                         (u8) card->thread_running_mask);
1584         rc = (card->thread_start_mask & thread);
1585         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1586         return rc;
1587 }
1588
1589 static int qeth_do_reset(void *data);
1590 static void qeth_start_kernel_thread(struct work_struct *work)
1591 {
1592         struct task_struct *ts;
1593         struct qeth_card *card = container_of(work, struct qeth_card,
1594                                         kernel_thread_starter);
1595         QETH_CARD_TEXT(card, 2, "strthrd");
1596
1597         if (card->read.state != CH_STATE_UP &&
1598             card->write.state != CH_STATE_UP)
1599                 return;
1600         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1601                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1602                 if (IS_ERR(ts)) {
1603                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1604                         qeth_clear_thread_running_bit(card,
1605                                 QETH_RECOVER_THREAD);
1606                 }
1607         }
1608 }
1609
1610 static void qeth_buffer_reclaim_work(struct work_struct *);
1611 static void qeth_setup_card(struct qeth_card *card)
1612 {
1613         QETH_CARD_TEXT(card, 2, "setupcrd");
1614
1615         card->info.type = CARD_RDEV(card)->id.driver_info;
1616         card->state = CARD_STATE_DOWN;
1617         spin_lock_init(&card->lock);
1618         spin_lock_init(&card->thread_mask_lock);
1619         mutex_init(&card->conf_mutex);
1620         mutex_init(&card->discipline_mutex);
1621         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1622         INIT_LIST_HEAD(&card->cmd_waiter_list);
1623         init_waitqueue_head(&card->wait_q);
1624         qeth_set_initial_options(card);
1625         /* IP address takeover */
1626         INIT_LIST_HEAD(&card->ipato.entries);
1627         qeth_init_qdio_info(card);
1628         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1629         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1630         hash_init(card->rx_mode_addrs);
1631         hash_init(card->local_addrs4);
1632         hash_init(card->local_addrs6);
1633         spin_lock_init(&card->local_addrs4_lock);
1634         spin_lock_init(&card->local_addrs6_lock);
1635 }
1636
1637 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1638 {
1639         struct qeth_card *card = container_of(slr, struct qeth_card,
1640                                         qeth_service_level);
1641         if (card->info.mcl_level[0])
1642                 seq_printf(m, "qeth: %s firmware level %s\n",
1643                         CARD_BUS_ID(card), card->info.mcl_level);
1644 }
1645
1646 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1647 {
1648         struct qeth_card *card;
1649
1650         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1651         card = kzalloc(sizeof(*card), GFP_KERNEL);
1652         if (!card)
1653                 goto out;
1654         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1655
1656         card->gdev = gdev;
1657         dev_set_drvdata(&gdev->dev, card);
1658         CARD_RDEV(card) = gdev->cdev[0];
1659         CARD_WDEV(card) = gdev->cdev[1];
1660         CARD_DDEV(card) = gdev->cdev[2];
1661
1662         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1663                                                  dev_name(&gdev->dev));
1664         if (!card->event_wq)
1665                 goto out_wq;
1666
1667         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1668         if (!card->read_cmd)
1669                 goto out_read_cmd;
1670
1671         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1672                                            qeth_debugfs_root);
1673         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1674                             &qeth_debugfs_local_addr_fops);
1675
1676         card->qeth_service_level.seq_print = qeth_core_sl_print;
1677         register_service_level(&card->qeth_service_level);
1678         return card;
1679
1680 out_read_cmd:
1681         destroy_workqueue(card->event_wq);
1682 out_wq:
1683         dev_set_drvdata(&gdev->dev, NULL);
1684         kfree(card);
1685 out:
1686         return NULL;
1687 }
1688
1689 static int qeth_clear_channel(struct qeth_card *card,
1690                               struct qeth_channel *channel)
1691 {
1692         int rc;
1693
1694         QETH_CARD_TEXT(card, 3, "clearch");
1695         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1696         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1697         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1698
1699         if (rc)
1700                 return rc;
1701         rc = wait_event_interruptible_timeout(card->wait_q,
1702                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1703         if (rc == -ERESTARTSYS)
1704                 return rc;
1705         if (channel->state != CH_STATE_STOPPED)
1706                 return -ETIME;
1707         channel->state = CH_STATE_DOWN;
1708         return 0;
1709 }
1710
1711 static int qeth_halt_channel(struct qeth_card *card,
1712                              struct qeth_channel *channel)
1713 {
1714         int rc;
1715
1716         QETH_CARD_TEXT(card, 3, "haltch");
1717         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1718         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1719         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1720
1721         if (rc)
1722                 return rc;
1723         rc = wait_event_interruptible_timeout(card->wait_q,
1724                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1725         if (rc == -ERESTARTSYS)
1726                 return rc;
1727         if (channel->state != CH_STATE_HALTED)
1728                 return -ETIME;
1729         return 0;
1730 }
1731
1732 static int qeth_stop_channel(struct qeth_channel *channel)
1733 {
1734         struct ccw_device *cdev = channel->ccwdev;
1735         int rc;
1736
1737         rc = ccw_device_set_offline(cdev);
1738
1739         spin_lock_irq(get_ccwdev_lock(cdev));
1740         if (channel->active_cmd) {
1741                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1742                         channel->active_cmd);
1743                 channel->active_cmd = NULL;
1744         }
1745         cdev->handler = NULL;
1746         spin_unlock_irq(get_ccwdev_lock(cdev));
1747
1748         return rc;
1749 }
1750
1751 static int qeth_start_channel(struct qeth_channel *channel)
1752 {
1753         struct ccw_device *cdev = channel->ccwdev;
1754         int rc;
1755
1756         channel->state = CH_STATE_DOWN;
1757         atomic_set(&channel->irq_pending, 0);
1758
1759         spin_lock_irq(get_ccwdev_lock(cdev));
1760         cdev->handler = qeth_irq;
1761         spin_unlock_irq(get_ccwdev_lock(cdev));
1762
1763         rc = ccw_device_set_online(cdev);
1764         if (rc)
1765                 goto err;
1766
1767         return 0;
1768
1769 err:
1770         spin_lock_irq(get_ccwdev_lock(cdev));
1771         cdev->handler = NULL;
1772         spin_unlock_irq(get_ccwdev_lock(cdev));
1773         return rc;
1774 }
1775
1776 static int qeth_halt_channels(struct qeth_card *card)
1777 {
1778         int rc1 = 0, rc2 = 0, rc3 = 0;
1779
1780         QETH_CARD_TEXT(card, 3, "haltchs");
1781         rc1 = qeth_halt_channel(card, &card->read);
1782         rc2 = qeth_halt_channel(card, &card->write);
1783         rc3 = qeth_halt_channel(card, &card->data);
1784         if (rc1)
1785                 return rc1;
1786         if (rc2)
1787                 return rc2;
1788         return rc3;
1789 }
1790
1791 static int qeth_clear_channels(struct qeth_card *card)
1792 {
1793         int rc1 = 0, rc2 = 0, rc3 = 0;
1794
1795         QETH_CARD_TEXT(card, 3, "clearchs");
1796         rc1 = qeth_clear_channel(card, &card->read);
1797         rc2 = qeth_clear_channel(card, &card->write);
1798         rc3 = qeth_clear_channel(card, &card->data);
1799         if (rc1)
1800                 return rc1;
1801         if (rc2)
1802                 return rc2;
1803         return rc3;
1804 }
1805
1806 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1807 {
1808         int rc = 0;
1809
1810         QETH_CARD_TEXT(card, 3, "clhacrd");
1811
1812         if (halt)
1813                 rc = qeth_halt_channels(card);
1814         if (rc)
1815                 return rc;
1816         return qeth_clear_channels(card);
1817 }
1818
1819 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1820 {
1821         int rc = 0;
1822
1823         QETH_CARD_TEXT(card, 3, "qdioclr");
1824         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1825                 QETH_QDIO_CLEANING)) {
1826         case QETH_QDIO_ESTABLISHED:
1827                 if (IS_IQD(card))
1828                         rc = qdio_shutdown(CARD_DDEV(card),
1829                                 QDIO_FLAG_CLEANUP_USING_HALT);
1830                 else
1831                         rc = qdio_shutdown(CARD_DDEV(card),
1832                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1833                 if (rc)
1834                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1835                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1836                 break;
1837         case QETH_QDIO_CLEANING:
1838                 return rc;
1839         default:
1840                 break;
1841         }
1842         rc = qeth_clear_halt_card(card, use_halt);
1843         if (rc)
1844                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1845         return rc;
1846 }
1847
1848 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1849 {
1850         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1851         struct diag26c_vnic_resp *response = NULL;
1852         struct diag26c_vnic_req *request = NULL;
1853         struct ccw_dev_id id;
1854         char userid[80];
1855         int rc = 0;
1856
1857         QETH_CARD_TEXT(card, 2, "vmlayer");
1858
1859         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1860         if (rc)
1861                 goto out;
1862
1863         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1864         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1865         if (!request || !response) {
1866                 rc = -ENOMEM;
1867                 goto out;
1868         }
1869
1870         ccw_device_get_id(CARD_RDEV(card), &id);
1871         request->resp_buf_len = sizeof(*response);
1872         request->resp_version = DIAG26C_VERSION6_VM65918;
1873         request->req_format = DIAG26C_VNIC_INFO;
1874         ASCEBC(userid, 8);
1875         memcpy(&request->sys_name, userid, 8);
1876         request->devno = id.devno;
1877
1878         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1879         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1880         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1881         if (rc)
1882                 goto out;
1883         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1884
1885         if (request->resp_buf_len < sizeof(*response) ||
1886             response->version != request->resp_version) {
1887                 rc = -EIO;
1888                 goto out;
1889         }
1890
1891         if (response->protocol == VNIC_INFO_PROT_L2)
1892                 disc = QETH_DISCIPLINE_LAYER2;
1893         else if (response->protocol == VNIC_INFO_PROT_L3)
1894                 disc = QETH_DISCIPLINE_LAYER3;
1895
1896 out:
1897         kfree(response);
1898         kfree(request);
1899         if (rc)
1900                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1901         return disc;
1902 }
1903
1904 /* Determine whether the device requires a specific layer discipline */
1905 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1906 {
1907         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1908
1909         if (IS_OSM(card) || IS_OSN(card))
1910                 disc = QETH_DISCIPLINE_LAYER2;
1911         else if (IS_VM_NIC(card))
1912                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1913                                       qeth_vm_detect_layer(card);
1914
1915         switch (disc) {
1916         case QETH_DISCIPLINE_LAYER2:
1917                 QETH_CARD_TEXT(card, 3, "force l2");
1918                 break;
1919         case QETH_DISCIPLINE_LAYER3:
1920                 QETH_CARD_TEXT(card, 3, "force l3");
1921                 break;
1922         default:
1923                 QETH_CARD_TEXT(card, 3, "force no");
1924         }
1925
1926         return disc;
1927 }
1928
1929 static void qeth_set_blkt_defaults(struct qeth_card *card)
1930 {
1931         QETH_CARD_TEXT(card, 2, "cfgblkt");
1932
1933         if (card->info.use_v1_blkt) {
1934                 card->info.blkt.time_total = 0;
1935                 card->info.blkt.inter_packet = 0;
1936                 card->info.blkt.inter_packet_jumbo = 0;
1937         } else {
1938                 card->info.blkt.time_total = 250;
1939                 card->info.blkt.inter_packet = 5;
1940                 card->info.blkt.inter_packet_jumbo = 15;
1941         }
1942 }
1943
1944 static void qeth_idx_init(struct qeth_card *card)
1945 {
1946         memset(&card->seqno, 0, sizeof(card->seqno));
1947
1948         card->token.issuer_rm_w = 0x00010103UL;
1949         card->token.cm_filter_w = 0x00010108UL;
1950         card->token.cm_connection_w = 0x0001010aUL;
1951         card->token.ulp_filter_w = 0x0001010bUL;
1952         card->token.ulp_connection_w = 0x0001010dUL;
1953
1954         switch (card->info.type) {
1955         case QETH_CARD_TYPE_IQD:
1956                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1957                 break;
1958         case QETH_CARD_TYPE_OSD:
1959         case QETH_CARD_TYPE_OSN:
1960                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1961                 break;
1962         default:
1963                 break;
1964         }
1965 }
1966
1967 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1968                                   struct qeth_cmd_buffer *iob)
1969 {
1970         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1971                QETH_SEQ_NO_LENGTH);
1972         if (iob->channel == &card->write)
1973                 card->seqno.trans_hdr++;
1974 }
1975
1976 static int qeth_peer_func_level(int level)
1977 {
1978         if ((level & 0xff) == 8)
1979                 return (level & 0xff) + 0x400;
1980         if (((level >> 8) & 3) == 1)
1981                 return (level & 0xff) + 0x200;
1982         return level;
1983 }
1984
1985 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1986                                   struct qeth_cmd_buffer *iob)
1987 {
1988         qeth_idx_finalize_cmd(card, iob);
1989
1990         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1991                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1992         card->seqno.pdu_hdr++;
1993         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1994                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1995
1996         iob->callback = qeth_release_buffer_cb;
1997 }
1998
1999 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
2000                                  struct qeth_cmd_buffer *reply)
2001 {
2002         /* MPC cmds are issued strictly in sequence. */
2003         return !IS_IPA(reply->data);
2004 }
2005
2006 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
2007                                                   const void *data,
2008                                                   unsigned int data_length)
2009 {
2010         struct qeth_cmd_buffer *iob;
2011
2012         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
2013         if (!iob)
2014                 return NULL;
2015
2016         memcpy(iob->data, data, data_length);
2017         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
2018                        iob->data);
2019         iob->finalize = qeth_mpc_finalize_cmd;
2020         iob->match = qeth_mpc_match_reply;
2021         return iob;
2022 }
2023
2024 /**
2025  * qeth_send_control_data() -   send control command to the card
2026  * @card:                       qeth_card structure pointer
2027  * @iob:                        qeth_cmd_buffer pointer
2028  * @reply_cb:                   callback function pointer
2029  * @cb_card:                    pointer to the qeth_card structure
2030  * @cb_reply:                   pointer to the qeth_reply structure
2031  * @cb_cmd:                     pointer to the original iob for non-IPA
2032  *                              commands, or to the qeth_ipa_cmd structure
2033  *                              for the IPA commands.
2034  * @reply_param:                private pointer passed to the callback
2035  *
2036  * Callback function gets called one or more times, with cb_cmd
2037  * pointing to the response returned by the hardware. Callback
2038  * function must return
2039  *   > 0 if more reply blocks are expected,
2040  *     0 if the last or only reply block is received, and
2041  *   < 0 on error.
2042  * Callback function can get the value of the reply_param pointer from the
2043  * field 'param' of the structure qeth_reply.
2044  */
2045
2046 static int qeth_send_control_data(struct qeth_card *card,
2047                                   struct qeth_cmd_buffer *iob,
2048                                   int (*reply_cb)(struct qeth_card *cb_card,
2049                                                   struct qeth_reply *cb_reply,
2050                                                   unsigned long cb_cmd),
2051                                   void *reply_param)
2052 {
2053         struct qeth_channel *channel = iob->channel;
2054         struct qeth_reply *reply = &iob->reply;
2055         long timeout = iob->timeout;
2056         int rc;
2057
2058         QETH_CARD_TEXT(card, 2, "sendctl");
2059
2060         reply->callback = reply_cb;
2061         reply->param = reply_param;
2062
2063         timeout = wait_event_interruptible_timeout(card->wait_q,
2064                                                    qeth_trylock_channel(channel),
2065                                                    timeout);
2066         if (timeout <= 0) {
2067                 qeth_put_cmd(iob);
2068                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2069         }
2070
2071         if (iob->finalize)
2072                 iob->finalize(card, iob);
2073         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2074
2075         qeth_enqueue_cmd(card, iob);
2076
2077         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2078         qeth_get_cmd(iob);
2079
2080         QETH_CARD_TEXT(card, 6, "noirqpnd");
2081         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2082         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2083                                       (addr_t) iob, 0, 0, timeout);
2084         if (!rc)
2085                 channel->active_cmd = iob;
2086         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2087         if (rc) {
2088                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2089                                  CARD_DEVID(card), rc);
2090                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2091                 qeth_dequeue_cmd(card, iob);
2092                 qeth_put_cmd(iob);
2093                 qeth_unlock_channel(card, channel);
2094                 goto out;
2095         }
2096
2097         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2098                                                             timeout);
2099         if (timeout <= 0)
2100                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2101
2102         qeth_dequeue_cmd(card, iob);
2103
2104         if (reply_cb) {
2105                 /* Wait until the callback for a late reply has completed: */
2106                 spin_lock_irq(&iob->lock);
2107                 if (rc)
2108                         /* Zap any callback that's still pending: */
2109                         iob->rc = rc;
2110                 spin_unlock_irq(&iob->lock);
2111         }
2112
2113         if (!rc)
2114                 rc = iob->rc;
2115
2116 out:
2117         qeth_put_cmd(iob);
2118         return rc;
2119 }
2120
2121 struct qeth_node_desc {
2122         struct node_descriptor nd1;
2123         struct node_descriptor nd2;
2124         struct node_descriptor nd3;
2125 };
2126
2127 static void qeth_read_conf_data_cb(struct qeth_card *card,
2128                                    struct qeth_cmd_buffer *iob,
2129                                    unsigned int data_length)
2130 {
2131         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2132         int rc = 0;
2133         u8 *tag;
2134
2135         QETH_CARD_TEXT(card, 2, "cfgunit");
2136
2137         if (data_length < sizeof(*nd)) {
2138                 rc = -EINVAL;
2139                 goto out;
2140         }
2141
2142         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2143                                nd->nd1.plant[1] == _ascebc['M'];
2144         tag = (u8 *)&nd->nd1.tag;
2145         card->info.chpid = tag[0];
2146         card->info.unit_addr2 = tag[1];
2147
2148         tag = (u8 *)&nd->nd2.tag;
2149         card->info.cula = tag[1];
2150
2151         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2152                                  nd->nd3.model[1] == 0xF0 &&
2153                                  nd->nd3.model[2] >= 0xF1 &&
2154                                  nd->nd3.model[2] <= 0xF4;
2155
2156 out:
2157         qeth_notify_cmd(iob, rc);
2158         qeth_put_cmd(iob);
2159 }
2160
2161 static int qeth_read_conf_data(struct qeth_card *card)
2162 {
2163         struct qeth_channel *channel = &card->data;
2164         struct qeth_cmd_buffer *iob;
2165         struct ciw *ciw;
2166
2167         /* scan for RCD command in extended SenseID data */
2168         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2169         if (!ciw || ciw->cmd == 0)
2170                 return -EOPNOTSUPP;
2171         if (ciw->count < sizeof(struct qeth_node_desc))
2172                 return -EINVAL;
2173
2174         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2175         if (!iob)
2176                 return -ENOMEM;
2177
2178         iob->callback = qeth_read_conf_data_cb;
2179         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2180                        iob->data);
2181
2182         return qeth_send_control_data(card, iob, NULL, NULL);
2183 }
2184
2185 static int qeth_idx_check_activate_response(struct qeth_card *card,
2186                                             struct qeth_channel *channel,
2187                                             struct qeth_cmd_buffer *iob)
2188 {
2189         int rc;
2190
2191         rc = qeth_check_idx_response(card, iob->data);
2192         if (rc)
2193                 return rc;
2194
2195         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2196                 return 0;
2197
2198         /* negative reply: */
2199         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2200                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2201
2202         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2203         case QETH_IDX_ACT_ERR_EXCL:
2204                 dev_err(&channel->ccwdev->dev,
2205                         "The adapter is used exclusively by another host\n");
2206                 return -EBUSY;
2207         case QETH_IDX_ACT_ERR_AUTH:
2208         case QETH_IDX_ACT_ERR_AUTH_USER:
2209                 dev_err(&channel->ccwdev->dev,
2210                         "Setting the device online failed because of insufficient authorization\n");
2211                 return -EPERM;
2212         default:
2213                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2214                                  CCW_DEVID(channel->ccwdev));
2215                 return -EIO;
2216         }
2217 }
2218
2219 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2220                                               struct qeth_cmd_buffer *iob,
2221                                               unsigned int data_length)
2222 {
2223         struct qeth_channel *channel = iob->channel;
2224         u16 peer_level;
2225         int rc;
2226
2227         QETH_CARD_TEXT(card, 2, "idxrdcb");
2228
2229         rc = qeth_idx_check_activate_response(card, channel, iob);
2230         if (rc)
2231                 goto out;
2232
2233         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2234         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2235                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2236                                  CCW_DEVID(channel->ccwdev),
2237                                  card->info.func_level, peer_level);
2238                 rc = -EINVAL;
2239                 goto out;
2240         }
2241
2242         memcpy(&card->token.issuer_rm_r,
2243                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2244                QETH_MPC_TOKEN_LENGTH);
2245         memcpy(&card->info.mcl_level[0],
2246                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2247
2248 out:
2249         qeth_notify_cmd(iob, rc);
2250         qeth_put_cmd(iob);
2251 }
2252
2253 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2254                                                struct qeth_cmd_buffer *iob,
2255                                                unsigned int data_length)
2256 {
2257         struct qeth_channel *channel = iob->channel;
2258         u16 peer_level;
2259         int rc;
2260
2261         QETH_CARD_TEXT(card, 2, "idxwrcb");
2262
2263         rc = qeth_idx_check_activate_response(card, channel, iob);
2264         if (rc)
2265                 goto out;
2266
2267         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2268         if ((peer_level & ~0x0100) !=
2269             qeth_peer_func_level(card->info.func_level)) {
2270                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2271                                  CCW_DEVID(channel->ccwdev),
2272                                  card->info.func_level, peer_level);
2273                 rc = -EINVAL;
2274         }
2275
2276 out:
2277         qeth_notify_cmd(iob, rc);
2278         qeth_put_cmd(iob);
2279 }
2280
2281 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2282                                         struct qeth_cmd_buffer *iob)
2283 {
2284         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2285         u8 port = ((u8)card->dev->dev_port) | 0x80;
2286         struct ccw1 *ccw = __ccw_from_cmd(iob);
2287
2288         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2289                        iob->data);
2290         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2291         iob->finalize = qeth_idx_finalize_cmd;
2292
2293         port |= QETH_IDX_ACT_INVAL_FRAME;
2294         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2295         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2296                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2297         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2298                &card->info.func_level, 2);
2299         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2300         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2301 }
2302
2303 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2304 {
2305         struct qeth_channel *channel = &card->read;
2306         struct qeth_cmd_buffer *iob;
2307         int rc;
2308
2309         QETH_CARD_TEXT(card, 2, "idxread");
2310
2311         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2312         if (!iob)
2313                 return -ENOMEM;
2314
2315         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2316         qeth_idx_setup_activate_cmd(card, iob);
2317         iob->callback = qeth_idx_activate_read_channel_cb;
2318
2319         rc = qeth_send_control_data(card, iob, NULL, NULL);
2320         if (rc)
2321                 return rc;
2322
2323         channel->state = CH_STATE_UP;
2324         return 0;
2325 }
2326
2327 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2328 {
2329         struct qeth_channel *channel = &card->write;
2330         struct qeth_cmd_buffer *iob;
2331         int rc;
2332
2333         QETH_CARD_TEXT(card, 2, "idxwrite");
2334
2335         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2336         if (!iob)
2337                 return -ENOMEM;
2338
2339         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2340         qeth_idx_setup_activate_cmd(card, iob);
2341         iob->callback = qeth_idx_activate_write_channel_cb;
2342
2343         rc = qeth_send_control_data(card, iob, NULL, NULL);
2344         if (rc)
2345                 return rc;
2346
2347         channel->state = CH_STATE_UP;
2348         return 0;
2349 }
2350
2351 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2352                 unsigned long data)
2353 {
2354         struct qeth_cmd_buffer *iob;
2355
2356         QETH_CARD_TEXT(card, 2, "cmenblcb");
2357
2358         iob = (struct qeth_cmd_buffer *) data;
2359         memcpy(&card->token.cm_filter_r,
2360                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2361                QETH_MPC_TOKEN_LENGTH);
2362         return 0;
2363 }
2364
2365 static int qeth_cm_enable(struct qeth_card *card)
2366 {
2367         struct qeth_cmd_buffer *iob;
2368
2369         QETH_CARD_TEXT(card, 2, "cmenable");
2370
2371         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2372         if (!iob)
2373                 return -ENOMEM;
2374
2375         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2376                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2377         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2378                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2379
2380         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2381 }
2382
2383 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2384                 unsigned long data)
2385 {
2386         struct qeth_cmd_buffer *iob;
2387
2388         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2389
2390         iob = (struct qeth_cmd_buffer *) data;
2391         memcpy(&card->token.cm_connection_r,
2392                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2393                QETH_MPC_TOKEN_LENGTH);
2394         return 0;
2395 }
2396
2397 static int qeth_cm_setup(struct qeth_card *card)
2398 {
2399         struct qeth_cmd_buffer *iob;
2400
2401         QETH_CARD_TEXT(card, 2, "cmsetup");
2402
2403         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2404         if (!iob)
2405                 return -ENOMEM;
2406
2407         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2408                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2409         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2410                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2411         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2412                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2413         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2414 }
2415
2416 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2417 {
2418         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2419             link_type == QETH_LINK_TYPE_HSTR) {
2420                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2421                 return false;
2422         }
2423
2424         return true;
2425 }
2426
2427 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2428 {
2429         struct net_device *dev = card->dev;
2430         unsigned int new_mtu;
2431
2432         if (!max_mtu) {
2433                 /* IQD needs accurate max MTU to set up its RX buffers: */
2434                 if (IS_IQD(card))
2435                         return -EINVAL;
2436                 /* tolerate quirky HW: */
2437                 max_mtu = ETH_MAX_MTU;
2438         }
2439
2440         rtnl_lock();
2441         if (IS_IQD(card)) {
2442                 /* move any device with default MTU to new max MTU: */
2443                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2444
2445                 /* adjust RX buffer size to new max MTU: */
2446                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2447                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2448                         qeth_free_qdio_queues(card);
2449         } else {
2450                 if (dev->mtu)
2451                         new_mtu = dev->mtu;
2452                 /* default MTUs for first setup: */
2453                 else if (IS_LAYER2(card))
2454                         new_mtu = ETH_DATA_LEN;
2455                 else
2456                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2457         }
2458
2459         dev->max_mtu = max_mtu;
2460         dev->mtu = min(new_mtu, max_mtu);
2461         rtnl_unlock();
2462         return 0;
2463 }
2464
2465 static int qeth_get_mtu_outof_framesize(int framesize)
2466 {
2467         switch (framesize) {
2468         case 0x4000:
2469                 return 8192;
2470         case 0x6000:
2471                 return 16384;
2472         case 0xa000:
2473                 return 32768;
2474         case 0xffff:
2475                 return 57344;
2476         default:
2477                 return 0;
2478         }
2479 }
2480
2481 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2482                 unsigned long data)
2483 {
2484         __u16 mtu, framesize;
2485         __u16 len;
2486         struct qeth_cmd_buffer *iob;
2487         u8 link_type = 0;
2488
2489         QETH_CARD_TEXT(card, 2, "ulpenacb");
2490
2491         iob = (struct qeth_cmd_buffer *) data;
2492         memcpy(&card->token.ulp_filter_r,
2493                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2494                QETH_MPC_TOKEN_LENGTH);
2495         if (IS_IQD(card)) {
2496                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2497                 mtu = qeth_get_mtu_outof_framesize(framesize);
2498         } else {
2499                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2500         }
2501         *(u16 *)reply->param = mtu;
2502
2503         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2504         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2505                 memcpy(&link_type,
2506                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2507                 if (!qeth_is_supported_link_type(card, link_type))
2508                         return -EPROTONOSUPPORT;
2509         }
2510
2511         card->info.link_type = link_type;
2512         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2513         return 0;
2514 }
2515
2516 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2517 {
2518         if (IS_OSN(card))
2519                 return QETH_PROT_OSN2;
2520         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2521 }
2522
2523 static int qeth_ulp_enable(struct qeth_card *card)
2524 {
2525         u8 prot_type = qeth_mpc_select_prot_type(card);
2526         struct qeth_cmd_buffer *iob;
2527         u16 max_mtu;
2528         int rc;
2529
2530         QETH_CARD_TEXT(card, 2, "ulpenabl");
2531
2532         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2533         if (!iob)
2534                 return -ENOMEM;
2535
2536         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2537         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2538         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2539                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2540         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2541                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2542         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2543         if (rc)
2544                 return rc;
2545         return qeth_update_max_mtu(card, max_mtu);
2546 }
2547
2548 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2549                 unsigned long data)
2550 {
2551         struct qeth_cmd_buffer *iob;
2552
2553         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2554
2555         iob = (struct qeth_cmd_buffer *) data;
2556         memcpy(&card->token.ulp_connection_r,
2557                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2558                QETH_MPC_TOKEN_LENGTH);
2559         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2560                      3)) {
2561                 QETH_CARD_TEXT(card, 2, "olmlimit");
2562                 dev_err(&card->gdev->dev, "A connection could not be "
2563                         "established because of an OLM limit\n");
2564                 return -EMLINK;
2565         }
2566         return 0;
2567 }
2568
2569 static int qeth_ulp_setup(struct qeth_card *card)
2570 {
2571         __u16 temp;
2572         struct qeth_cmd_buffer *iob;
2573
2574         QETH_CARD_TEXT(card, 2, "ulpsetup");
2575
2576         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2577         if (!iob)
2578                 return -ENOMEM;
2579
2580         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2581                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2582         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2583                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2584         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2585                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2586
2587         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2588         temp = (card->info.cula << 8) + card->info.unit_addr2;
2589         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2590         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2591 }
2592
2593 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2594 {
2595         struct qeth_qdio_out_buffer *newbuf;
2596
2597         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2598         if (!newbuf)
2599                 return -ENOMEM;
2600
2601         newbuf->buffer = q->qdio_bufs[bidx];
2602         skb_queue_head_init(&newbuf->skb_list);
2603         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2604         newbuf->q = q;
2605         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2606         q->bufs[bidx] = newbuf;
2607         return 0;
2608 }
2609
2610 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2611 {
2612         if (!q)
2613                 return;
2614
2615         qeth_drain_output_queue(q, true);
2616         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2617         kfree(q);
2618 }
2619
2620 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2621 {
2622         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2623         unsigned int i;
2624
2625         if (!q)
2626                 return NULL;
2627
2628         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2629                 goto err_qdio_bufs;
2630
2631         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2632                 if (qeth_init_qdio_out_buf(q, i))
2633                         goto err_out_bufs;
2634         }
2635
2636         return q;
2637
2638 err_out_bufs:
2639         while (i > 0)
2640                 kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[--i]);
2641         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2642 err_qdio_bufs:
2643         kfree(q);
2644         return NULL;
2645 }
2646
2647 static void qeth_tx_completion_timer(struct timer_list *timer)
2648 {
2649         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2650
2651         napi_schedule(&queue->napi);
2652         QETH_TXQ_STAT_INC(queue, completion_timer);
2653 }
2654
2655 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2656 {
2657         unsigned int i;
2658
2659         QETH_CARD_TEXT(card, 2, "allcqdbf");
2660
2661         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2662                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2663                 return 0;
2664
2665         QETH_CARD_TEXT(card, 2, "inq");
2666         card->qdio.in_q = qeth_alloc_qdio_queue();
2667         if (!card->qdio.in_q)
2668                 goto out_nomem;
2669
2670         /* inbound buffer pool */
2671         if (qeth_alloc_buffer_pool(card))
2672                 goto out_freeinq;
2673
2674         /* outbound */
2675         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2676                 struct qeth_qdio_out_q *queue;
2677
2678                 queue = qeth_alloc_output_queue();
2679                 if (!queue)
2680                         goto out_freeoutq;
2681                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2682                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2683                 card->qdio.out_qs[i] = queue;
2684                 queue->card = card;
2685                 queue->queue_no = i;
2686                 INIT_LIST_HEAD(&queue->pending_bufs);
2687                 spin_lock_init(&queue->lock);
2688                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2689                 queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2690                 queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2691                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2692         }
2693
2694         /* completion */
2695         if (qeth_alloc_cq(card))
2696                 goto out_freeoutq;
2697
2698         return 0;
2699
2700 out_freeoutq:
2701         while (i > 0) {
2702                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2703                 card->qdio.out_qs[i] = NULL;
2704         }
2705         qeth_free_buffer_pool(card);
2706 out_freeinq:
2707         qeth_free_qdio_queue(card->qdio.in_q);
2708         card->qdio.in_q = NULL;
2709 out_nomem:
2710         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2711         return -ENOMEM;
2712 }
2713
2714 static void qeth_free_qdio_queues(struct qeth_card *card)
2715 {
2716         int i, j;
2717
2718         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2719                 QETH_QDIO_UNINITIALIZED)
2720                 return;
2721
2722         qeth_free_cq(card);
2723         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2724                 if (card->qdio.in_q->bufs[j].rx_skb)
2725                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2726         }
2727         qeth_free_qdio_queue(card->qdio.in_q);
2728         card->qdio.in_q = NULL;
2729         /* inbound buffer pool */
2730         qeth_free_buffer_pool(card);
2731         /* free outbound qdio_qs */
2732         for (i = 0; i < card->qdio.no_out_queues; i++) {
2733                 qeth_free_output_queue(card->qdio.out_qs[i]);
2734                 card->qdio.out_qs[i] = NULL;
2735         }
2736 }
2737
2738 static void qeth_fill_qib_parms(struct qeth_card *card,
2739                                 struct qeth_qib_parms *parms)
2740 {
2741         struct qeth_qdio_out_q *queue;
2742         unsigned int i;
2743
2744         parms->pcit_magic[0] = 'P';
2745         parms->pcit_magic[1] = 'C';
2746         parms->pcit_magic[2] = 'I';
2747         parms->pcit_magic[3] = 'T';
2748         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2749         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2750         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2751         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2752
2753         parms->blkt_magic[0] = 'B';
2754         parms->blkt_magic[1] = 'L';
2755         parms->blkt_magic[2] = 'K';
2756         parms->blkt_magic[3] = 'T';
2757         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2758         parms->blkt_total = card->info.blkt.time_total;
2759         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2760         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2761
2762         /* Prio-queueing implicitly uses the default priorities: */
2763         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2764                 return;
2765
2766         parms->pque_magic[0] = 'P';
2767         parms->pque_magic[1] = 'Q';
2768         parms->pque_magic[2] = 'U';
2769         parms->pque_magic[3] = 'E';
2770         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2771         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2772         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2773
2774         qeth_for_each_output_queue(card, queue, i)
2775                 parms->pque_priority[i] = queue->priority;
2776 }
2777
2778 static int qeth_qdio_activate(struct qeth_card *card)
2779 {
2780         QETH_CARD_TEXT(card, 3, "qdioact");
2781         return qdio_activate(CARD_DDEV(card));
2782 }
2783
2784 static int qeth_dm_act(struct qeth_card *card)
2785 {
2786         struct qeth_cmd_buffer *iob;
2787
2788         QETH_CARD_TEXT(card, 2, "dmact");
2789
2790         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2791         if (!iob)
2792                 return -ENOMEM;
2793
2794         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2795                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2796         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2797                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2798         return qeth_send_control_data(card, iob, NULL, NULL);
2799 }
2800
2801 static int qeth_mpc_initialize(struct qeth_card *card)
2802 {
2803         int rc;
2804
2805         QETH_CARD_TEXT(card, 2, "mpcinit");
2806
2807         rc = qeth_issue_next_read(card);
2808         if (rc) {
2809                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2810                 return rc;
2811         }
2812         rc = qeth_cm_enable(card);
2813         if (rc) {
2814                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2815                 return rc;
2816         }
2817         rc = qeth_cm_setup(card);
2818         if (rc) {
2819                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2820                 return rc;
2821         }
2822         rc = qeth_ulp_enable(card);
2823         if (rc) {
2824                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2825                 return rc;
2826         }
2827         rc = qeth_ulp_setup(card);
2828         if (rc) {
2829                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2830                 return rc;
2831         }
2832         rc = qeth_alloc_qdio_queues(card);
2833         if (rc) {
2834                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2835                 return rc;
2836         }
2837         rc = qeth_qdio_establish(card);
2838         if (rc) {
2839                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2840                 qeth_free_qdio_queues(card);
2841                 return rc;
2842         }
2843         rc = qeth_qdio_activate(card);
2844         if (rc) {
2845                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2846                 return rc;
2847         }
2848         rc = qeth_dm_act(card);
2849         if (rc) {
2850                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2851                 return rc;
2852         }
2853
2854         return 0;
2855 }
2856
2857 static void qeth_print_status_message(struct qeth_card *card)
2858 {
2859         switch (card->info.type) {
2860         case QETH_CARD_TYPE_OSD:
2861         case QETH_CARD_TYPE_OSM:
2862         case QETH_CARD_TYPE_OSX:
2863                 /* VM will use a non-zero first character
2864                  * to indicate a HiperSockets like reporting
2865                  * of the level OSA sets the first character to zero
2866                  * */
2867                 if (!card->info.mcl_level[0]) {
2868                         sprintf(card->info.mcl_level, "%02x%02x",
2869                                 card->info.mcl_level[2],
2870                                 card->info.mcl_level[3]);
2871                         break;
2872                 }
2873                 fallthrough;
2874         case QETH_CARD_TYPE_IQD:
2875                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2876                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2877                                 card->info.mcl_level[0]];
2878                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2879                                 card->info.mcl_level[1]];
2880                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2881                                 card->info.mcl_level[2]];
2882                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2883                                 card->info.mcl_level[3]];
2884                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2885                 }
2886                 break;
2887         default:
2888                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2889         }
2890         dev_info(&card->gdev->dev,
2891                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2892                  qeth_get_cardname(card),
2893                  (card->info.mcl_level[0]) ? " (level: " : "",
2894                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2895                  (card->info.mcl_level[0]) ? ")" : "",
2896                  qeth_get_cardname_short(card));
2897 }
2898
2899 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2900 {
2901         struct qeth_buffer_pool_entry *entry;
2902
2903         QETH_CARD_TEXT(card, 5, "inwrklst");
2904
2905         list_for_each_entry(entry,
2906                             &card->qdio.init_pool.entry_list, init_list) {
2907                 qeth_put_buffer_pool_entry(card, entry);
2908         }
2909 }
2910
2911 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2912                                         struct qeth_card *card)
2913 {
2914         struct qeth_buffer_pool_entry *entry;
2915         int i, free;
2916
2917         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2918                 return NULL;
2919
2920         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2921                 free = 1;
2922                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2923                         if (page_count(entry->elements[i]) > 1) {
2924                                 free = 0;
2925                                 break;
2926                         }
2927                 }
2928                 if (free) {
2929                         list_del_init(&entry->list);
2930                         return entry;
2931                 }
2932         }
2933
2934         /* no free buffer in pool so take first one and swap pages */
2935         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2936                                  struct qeth_buffer_pool_entry, list);
2937         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2938                 if (page_count(entry->elements[i]) > 1) {
2939                         struct page *page = dev_alloc_page();
2940
2941                         if (!page)
2942                                 return NULL;
2943
2944                         __free_page(entry->elements[i]);
2945                         entry->elements[i] = page;
2946                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2947                 }
2948         }
2949         list_del_init(&entry->list);
2950         return entry;
2951 }
2952
2953 static int qeth_init_input_buffer(struct qeth_card *card,
2954                 struct qeth_qdio_buffer *buf)
2955 {
2956         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2957         int i;
2958
2959         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2960                 buf->rx_skb = netdev_alloc_skb(card->dev,
2961                                                ETH_HLEN +
2962                                                sizeof(struct ipv6hdr));
2963                 if (!buf->rx_skb)
2964                         return -ENOMEM;
2965         }
2966
2967         if (!pool_entry) {
2968                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2969                 if (!pool_entry)
2970                         return -ENOBUFS;
2971
2972                 buf->pool_entry = pool_entry;
2973         }
2974
2975         /*
2976          * since the buffer is accessed only from the input_tasklet
2977          * there shouldn't be a need to synchronize; also, since we use
2978          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2979          * buffers
2980          */
2981         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2982                 buf->buffer->element[i].length = PAGE_SIZE;
2983                 buf->buffer->element[i].addr =
2984                         page_to_phys(pool_entry->elements[i]);
2985                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2986                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2987                 else
2988                         buf->buffer->element[i].eflags = 0;
2989                 buf->buffer->element[i].sflags = 0;
2990         }
2991         return 0;
2992 }
2993
2994 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2995                                             struct qeth_qdio_out_q *queue)
2996 {
2997         if (!IS_IQD(card) ||
2998             qeth_iqd_is_mcast_queue(card, queue) ||
2999             card->options.cq == QETH_CQ_ENABLED ||
3000             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
3001                 return 1;
3002
3003         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
3004 }
3005
3006 static int qeth_init_qdio_queues(struct qeth_card *card)
3007 {
3008         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
3009         unsigned int i;
3010         int rc;
3011
3012         QETH_CARD_TEXT(card, 2, "initqdqs");
3013
3014         /* inbound queue */
3015         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3016         memset(&card->rx, 0, sizeof(struct qeth_rx));
3017
3018         qeth_initialize_working_pool_list(card);
3019         /*give only as many buffers to hardware as we have buffer pool entries*/
3020         for (i = 0; i < rx_bufs; i++) {
3021                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3022                 if (rc)
3023                         return rc;
3024         }
3025
3026         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3027         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs);
3028         if (rc) {
3029                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3030                 return rc;
3031         }
3032
3033         /* completion */
3034         rc = qeth_cq_init(card);
3035         if (rc) {
3036                 return rc;
3037         }
3038
3039         /* outbound queue */
3040         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3041                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3042
3043                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3044                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3045                 queue->next_buf_to_fill = 0;
3046                 queue->do_pack = 0;
3047                 queue->prev_hdr = NULL;
3048                 queue->coalesced_frames = 0;
3049                 queue->bulk_start = 0;
3050                 queue->bulk_count = 0;
3051                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3052                 atomic_set(&queue->used_buffers, 0);
3053                 atomic_set(&queue->set_pci_flags_count, 0);
3054                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3055         }
3056         return 0;
3057 }
3058
3059 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3060                                   struct qeth_cmd_buffer *iob)
3061 {
3062         qeth_mpc_finalize_cmd(card, iob);
3063
3064         /* override with IPA-specific values: */
3065         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3066 }
3067
3068 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3069                           u16 cmd_length,
3070                           bool (*match)(struct qeth_cmd_buffer *iob,
3071                                         struct qeth_cmd_buffer *reply))
3072 {
3073         u8 prot_type = qeth_mpc_select_prot_type(card);
3074         u16 total_length = iob->length;
3075
3076         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3077                        iob->data);
3078         iob->finalize = qeth_ipa_finalize_cmd;
3079         iob->match = match;
3080
3081         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3082         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3083         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3084         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3085         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3086         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3087                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3088         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3089 }
3090 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
3091
3092 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3093                                  struct qeth_cmd_buffer *reply)
3094 {
3095         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3096
3097         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3098 }
3099
3100 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3101                                            enum qeth_ipa_cmds cmd_code,
3102                                            enum qeth_prot_versions prot,
3103                                            unsigned int data_length)
3104 {
3105         struct qeth_cmd_buffer *iob;
3106         struct qeth_ipacmd_hdr *hdr;
3107
3108         data_length += offsetof(struct qeth_ipa_cmd, data);
3109         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3110                              QETH_IPA_TIMEOUT);
3111         if (!iob)
3112                 return NULL;
3113
3114         qeth_prepare_ipa_cmd(card, iob, data_length, qeth_ipa_match_reply);
3115
3116         hdr = &__ipa_cmd(iob)->hdr;
3117         hdr->command = cmd_code;
3118         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3119         /* hdr->seqno is set by qeth_send_control_data() */
3120         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3121         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3122         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3123         hdr->param_count = 1;
3124         hdr->prot_version = prot;
3125         return iob;
3126 }
3127 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3128
3129 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3130                                 struct qeth_reply *reply, unsigned long data)
3131 {
3132         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3133
3134         return (cmd->hdr.return_code) ? -EIO : 0;
3135 }
3136
3137 /**
3138  * qeth_send_ipa_cmd() - send an IPA command
3139  *
3140  * See qeth_send_control_data() for explanation of the arguments.
3141  */
3142
3143 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3144                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3145                         unsigned long),
3146                 void *reply_param)
3147 {
3148         int rc;
3149
3150         QETH_CARD_TEXT(card, 4, "sendipa");
3151
3152         if (card->read_or_write_problem) {
3153                 qeth_put_cmd(iob);
3154                 return -EIO;
3155         }
3156
3157         if (reply_cb == NULL)
3158                 reply_cb = qeth_send_ipa_cmd_cb;
3159         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3160         if (rc == -ETIME) {
3161                 qeth_clear_ipacmd_list(card);
3162                 qeth_schedule_recovery(card);
3163         }
3164         return rc;
3165 }
3166 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3167
3168 static int qeth_send_startlan_cb(struct qeth_card *card,
3169                                  struct qeth_reply *reply, unsigned long data)
3170 {
3171         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3172
3173         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3174                 return -ENETDOWN;
3175
3176         return (cmd->hdr.return_code) ? -EIO : 0;
3177 }
3178
3179 static int qeth_send_startlan(struct qeth_card *card)
3180 {
3181         struct qeth_cmd_buffer *iob;
3182
3183         QETH_CARD_TEXT(card, 2, "strtlan");
3184
3185         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3186         if (!iob)
3187                 return -ENOMEM;
3188         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3189 }
3190
3191 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3192 {
3193         if (!cmd->hdr.return_code)
3194                 cmd->hdr.return_code =
3195                         cmd->data.setadapterparms.hdr.return_code;
3196         return cmd->hdr.return_code;
3197 }
3198
3199 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3200                 struct qeth_reply *reply, unsigned long data)
3201 {
3202         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3203         struct qeth_query_cmds_supp *query_cmd;
3204
3205         QETH_CARD_TEXT(card, 3, "quyadpcb");
3206         if (qeth_setadpparms_inspect_rc(cmd))
3207                 return -EIO;
3208
3209         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3210         if (query_cmd->lan_type & 0x7f) {
3211                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3212                         return -EPROTONOSUPPORT;
3213
3214                 card->info.link_type = query_cmd->lan_type;
3215                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3216         }
3217
3218         card->options.adp.supported = query_cmd->supported_cmds;
3219         return 0;
3220 }
3221
3222 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3223                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3224                                                     unsigned int data_length)
3225 {
3226         struct qeth_ipacmd_setadpparms_hdr *hdr;
3227         struct qeth_cmd_buffer *iob;
3228
3229         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3230                                  data_length +
3231                                  offsetof(struct qeth_ipacmd_setadpparms,
3232                                           data));
3233         if (!iob)
3234                 return NULL;
3235
3236         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3237         hdr->cmdlength = sizeof(*hdr) + data_length;
3238         hdr->command_code = adp_cmd;
3239         hdr->used_total = 1;
3240         hdr->seq_no = 1;
3241         return iob;
3242 }
3243
3244 static int qeth_query_setadapterparms(struct qeth_card *card)
3245 {
3246         int rc;
3247         struct qeth_cmd_buffer *iob;
3248
3249         QETH_CARD_TEXT(card, 3, "queryadp");
3250         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3251                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3252         if (!iob)
3253                 return -ENOMEM;
3254         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3255         return rc;
3256 }
3257
3258 static int qeth_query_ipassists_cb(struct qeth_card *card,
3259                 struct qeth_reply *reply, unsigned long data)
3260 {
3261         struct qeth_ipa_cmd *cmd;
3262
3263         QETH_CARD_TEXT(card, 2, "qipasscb");
3264
3265         cmd = (struct qeth_ipa_cmd *) data;
3266
3267         switch (cmd->hdr.return_code) {
3268         case IPA_RC_SUCCESS:
3269                 break;
3270         case IPA_RC_NOTSUPP:
3271         case IPA_RC_L2_UNSUPPORTED_CMD:
3272                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3273                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3274                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3275                 return -EOPNOTSUPP;
3276         default:
3277                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3278                                  CARD_DEVID(card), cmd->hdr.return_code);
3279                 return -EIO;
3280         }
3281
3282         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3283                 card->options.ipa4 = cmd->hdr.assists;
3284         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3285                 card->options.ipa6 = cmd->hdr.assists;
3286         else
3287                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3288                                  CARD_DEVID(card));
3289         return 0;
3290 }
3291
3292 static int qeth_query_ipassists(struct qeth_card *card,
3293                                 enum qeth_prot_versions prot)
3294 {
3295         int rc;
3296         struct qeth_cmd_buffer *iob;
3297
3298         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3299         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3300         if (!iob)
3301                 return -ENOMEM;
3302         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3303         return rc;
3304 }
3305
3306 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3307                                 struct qeth_reply *reply, unsigned long data)
3308 {
3309         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3310         struct qeth_query_switch_attributes *attrs;
3311         struct qeth_switch_info *sw_info;
3312
3313         QETH_CARD_TEXT(card, 2, "qswiatcb");
3314         if (qeth_setadpparms_inspect_rc(cmd))
3315                 return -EIO;
3316
3317         sw_info = (struct qeth_switch_info *)reply->param;
3318         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3319         sw_info->capabilities = attrs->capabilities;
3320         sw_info->settings = attrs->settings;
3321         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3322                         sw_info->settings);
3323         return 0;
3324 }
3325
3326 int qeth_query_switch_attributes(struct qeth_card *card,
3327                                  struct qeth_switch_info *sw_info)
3328 {
3329         struct qeth_cmd_buffer *iob;
3330
3331         QETH_CARD_TEXT(card, 2, "qswiattr");
3332         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3333                 return -EOPNOTSUPP;
3334         if (!netif_carrier_ok(card->dev))
3335                 return -ENOMEDIUM;
3336         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3337         if (!iob)
3338                 return -ENOMEM;
3339         return qeth_send_ipa_cmd(card, iob,
3340                                 qeth_query_switch_attributes_cb, sw_info);
3341 }
3342
3343 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3344                                           enum qeth_diags_cmds sub_cmd,
3345                                           unsigned int data_length)
3346 {
3347         struct qeth_ipacmd_diagass *cmd;
3348         struct qeth_cmd_buffer *iob;
3349
3350         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3351                                  DIAG_HDR_LEN + data_length);
3352         if (!iob)
3353                 return NULL;
3354
3355         cmd = &__ipa_cmd(iob)->data.diagass;
3356         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3357         cmd->subcmd = sub_cmd;
3358         return iob;
3359 }
3360 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3361
3362 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3363                 struct qeth_reply *reply, unsigned long data)
3364 {
3365         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3366         u16 rc = cmd->hdr.return_code;
3367
3368         if (rc) {
3369                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3370                 return -EIO;
3371         }
3372
3373         card->info.diagass_support = cmd->data.diagass.ext;
3374         return 0;
3375 }
3376
3377 static int qeth_query_setdiagass(struct qeth_card *card)
3378 {
3379         struct qeth_cmd_buffer *iob;
3380
3381         QETH_CARD_TEXT(card, 2, "qdiagass");
3382         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3383         if (!iob)
3384                 return -ENOMEM;
3385         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3386 }
3387
3388 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3389 {
3390         unsigned long info = get_zeroed_page(GFP_KERNEL);
3391         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3392         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3393         struct ccw_dev_id ccwid;
3394         int level;
3395
3396         tid->chpid = card->info.chpid;
3397         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3398         tid->ssid = ccwid.ssid;
3399         tid->devno = ccwid.devno;
3400         if (!info)
3401                 return;
3402         level = stsi(NULL, 0, 0, 0);
3403         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3404                 tid->lparnr = info222->lpar_number;
3405         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3406                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3407                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3408         }
3409         free_page(info);
3410 }
3411
3412 static int qeth_hw_trap_cb(struct qeth_card *card,
3413                 struct qeth_reply *reply, unsigned long data)
3414 {
3415         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3416         u16 rc = cmd->hdr.return_code;
3417
3418         if (rc) {
3419                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3420                 return -EIO;
3421         }
3422         return 0;
3423 }
3424
3425 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3426 {
3427         struct qeth_cmd_buffer *iob;
3428         struct qeth_ipa_cmd *cmd;
3429
3430         QETH_CARD_TEXT(card, 2, "diagtrap");
3431         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3432         if (!iob)
3433                 return -ENOMEM;
3434         cmd = __ipa_cmd(iob);
3435         cmd->data.diagass.type = 1;
3436         cmd->data.diagass.action = action;
3437         switch (action) {
3438         case QETH_DIAGS_TRAP_ARM:
3439                 cmd->data.diagass.options = 0x0003;
3440                 cmd->data.diagass.ext = 0x00010000 +
3441                         sizeof(struct qeth_trap_id);
3442                 qeth_get_trap_id(card,
3443                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3444                 break;
3445         case QETH_DIAGS_TRAP_DISARM:
3446                 cmd->data.diagass.options = 0x0001;
3447                 break;
3448         case QETH_DIAGS_TRAP_CAPTURE:
3449                 break;
3450         }
3451         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3452 }
3453
3454 static int qeth_check_qdio_errors(struct qeth_card *card,
3455                                   struct qdio_buffer *buf,
3456                                   unsigned int qdio_error,
3457                                   const char *dbftext)
3458 {
3459         if (qdio_error) {
3460                 QETH_CARD_TEXT(card, 2, dbftext);
3461                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3462                                buf->element[15].sflags);
3463                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3464                                buf->element[14].sflags);
3465                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3466                 if ((buf->element[15].sflags) == 0x12) {
3467                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3468                         return 0;
3469                 } else
3470                         return 1;
3471         }
3472         return 0;
3473 }
3474
3475 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3476                                          unsigned int count)
3477 {
3478         struct qeth_qdio_q *queue = card->qdio.in_q;
3479         struct list_head *lh;
3480         int i;
3481         int rc;
3482         int newcount = 0;
3483
3484         /* only requeue at a certain threshold to avoid SIGAs */
3485         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3486                 for (i = queue->next_buf_to_init;
3487                      i < queue->next_buf_to_init + count; ++i) {
3488                         if (qeth_init_input_buffer(card,
3489                                 &queue->bufs[QDIO_BUFNR(i)])) {
3490                                 break;
3491                         } else {
3492                                 newcount++;
3493                         }
3494                 }
3495
3496                 if (newcount < count) {
3497                         /* we are in memory shortage so we switch back to
3498                            traditional skb allocation and drop packages */
3499                         atomic_set(&card->force_alloc_skb, 3);
3500                         count = newcount;
3501                 } else {
3502                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3503                 }
3504
3505                 if (!count) {
3506                         i = 0;
3507                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3508                                 i++;
3509                         if (i == card->qdio.in_buf_pool.buf_count) {
3510                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3511                                 schedule_delayed_work(
3512                                         &card->buffer_reclaim_work,
3513                                         QETH_RECLAIM_WORK_TIME);
3514                         }
3515                         return 0;
3516                 }
3517
3518                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3519                              queue->next_buf_to_init, count);
3520                 if (rc) {
3521                         QETH_CARD_TEXT(card, 2, "qinberr");
3522                 }
3523                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3524                                                      count);
3525                 return count;
3526         }
3527
3528         return 0;
3529 }
3530
3531 static void qeth_buffer_reclaim_work(struct work_struct *work)
3532 {
3533         struct qeth_card *card = container_of(to_delayed_work(work),
3534                                               struct qeth_card,
3535                                               buffer_reclaim_work);
3536
3537         local_bh_disable();
3538         napi_schedule(&card->napi);
3539         /* kick-start the NAPI softirq: */
3540         local_bh_enable();
3541 }
3542
3543 static void qeth_handle_send_error(struct qeth_card *card,
3544                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3545 {
3546         int sbalf15 = buffer->buffer->element[15].sflags;
3547
3548         QETH_CARD_TEXT(card, 6, "hdsnderr");
3549         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3550
3551         if (!qdio_err)
3552                 return;
3553
3554         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3555                 return;
3556
3557         QETH_CARD_TEXT(card, 1, "lnkfail");
3558         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3559                        (u16)qdio_err, (u8)sbalf15);
3560 }
3561
3562 /**
3563  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3564  * @queue: queue to check for packing buffer
3565  *
3566  * Returns number of buffers that were prepared for flush.
3567  */
3568 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3569 {
3570         struct qeth_qdio_out_buffer *buffer;
3571
3572         buffer = queue->bufs[queue->next_buf_to_fill];
3573         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3574             (buffer->next_element_to_fill > 0)) {
3575                 /* it's a packing buffer */
3576                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3577                 queue->next_buf_to_fill =
3578                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3579                 return 1;
3580         }
3581         return 0;
3582 }
3583
3584 /*
3585  * Switched to packing state if the number of used buffers on a queue
3586  * reaches a certain limit.
3587  */
3588 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3589 {
3590         if (!queue->do_pack) {
3591                 if (atomic_read(&queue->used_buffers)
3592                     >= QETH_HIGH_WATERMARK_PACK){
3593                         /* switch non-PACKING -> PACKING */
3594                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3595                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3596                         queue->do_pack = 1;
3597                 }
3598         }
3599 }
3600
3601 /*
3602  * Switches from packing to non-packing mode. If there is a packing
3603  * buffer on the queue this buffer will be prepared to be flushed.
3604  * In that case 1 is returned to inform the caller. If no buffer
3605  * has to be flushed, zero is returned.
3606  */
3607 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3608 {
3609         if (queue->do_pack) {
3610                 if (atomic_read(&queue->used_buffers)
3611                     <= QETH_LOW_WATERMARK_PACK) {
3612                         /* switch PACKING -> non-PACKING */
3613                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3614                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3615                         queue->do_pack = 0;
3616                         return qeth_prep_flush_pack_buffer(queue);
3617                 }
3618         }
3619         return 0;
3620 }
3621
3622 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3623                                int count)
3624 {
3625         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3626         unsigned int qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3627         struct qeth_card *card = queue->card;
3628         int rc;
3629         int i;
3630
3631         for (i = index; i < index + count; ++i) {
3632                 unsigned int bidx = QDIO_BUFNR(i);
3633                 struct sk_buff *skb;
3634
3635                 buf = queue->bufs[bidx];
3636                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3637                                 SBAL_EFLAGS_LAST_ENTRY;
3638                 queue->coalesced_frames += buf->frames;
3639
3640                 if (queue->bufstates)
3641                         queue->bufstates[bidx].user = buf;
3642
3643                 if (IS_IQD(card)) {
3644                         skb_queue_walk(&buf->skb_list, skb)
3645                                 skb_tx_timestamp(skb);
3646                 }
3647         }
3648
3649         if (!IS_IQD(card)) {
3650                 if (!queue->do_pack) {
3651                         if ((atomic_read(&queue->used_buffers) >=
3652                                 (QETH_HIGH_WATERMARK_PACK -
3653                                  QETH_WATERMARK_PACK_FUZZ)) &&
3654                             !atomic_read(&queue->set_pci_flags_count)) {
3655                                 /* it's likely that we'll go to packing
3656                                  * mode soon */
3657                                 atomic_inc(&queue->set_pci_flags_count);
3658                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3659                         }
3660                 } else {
3661                         if (!atomic_read(&queue->set_pci_flags_count)) {
3662                                 /*
3663                                  * there's no outstanding PCI any more, so we
3664                                  * have to request a PCI to be sure the the PCI
3665                                  * will wake at some time in the future then we
3666                                  * can flush packed buffers that might still be
3667                                  * hanging around, which can happen if no
3668                                  * further send was requested by the stack
3669                                  */
3670                                 atomic_inc(&queue->set_pci_flags_count);
3671                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3672                         }
3673                 }
3674
3675                 if (atomic_read(&queue->set_pci_flags_count))
3676                         qdio_flags |= QDIO_FLAG_PCI_OUT;
3677         }
3678
3679         QETH_TXQ_STAT_INC(queue, doorbell);
3680         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3681                      queue->queue_no, index, count);
3682
3683         switch (rc) {
3684         case 0:
3685         case -ENOBUFS:
3686                 /* ignore temporary SIGA errors without busy condition */
3687
3688                 /* Fake the TX completion interrupt: */
3689                 if (IS_IQD(card)) {
3690                         unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
3691                         unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
3692
3693                         if (frames && queue->coalesced_frames >= frames) {
3694                                 napi_schedule(&queue->napi);
3695                                 queue->coalesced_frames = 0;
3696                                 QETH_TXQ_STAT_INC(queue, coal_frames);
3697                         } else if (usecs) {
3698                                 qeth_tx_arm_timer(queue, usecs);
3699                         }
3700                 }
3701
3702                 break;
3703         default:
3704                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3705                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3706                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3707                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3708                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3709
3710                 /* this must not happen under normal circumstances. if it
3711                  * happens something is really wrong -> recover */
3712                 qeth_schedule_recovery(queue->card);
3713         }
3714 }
3715
3716 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3717 {
3718         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3719
3720         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3721         queue->prev_hdr = NULL;
3722         queue->bulk_count = 0;
3723 }
3724
3725 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3726 {
3727         /*
3728          * check if weed have to switch to non-packing mode or if
3729          * we have to get a pci flag out on the queue
3730          */
3731         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3732             !atomic_read(&queue->set_pci_flags_count)) {
3733                 unsigned int index, flush_cnt;
3734                 bool q_was_packing;
3735
3736                 spin_lock(&queue->lock);
3737
3738                 index = queue->next_buf_to_fill;
3739                 q_was_packing = queue->do_pack;
3740
3741                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3742                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3743                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3744
3745                 if (flush_cnt) {
3746                         qeth_flush_buffers(queue, index, flush_cnt);
3747                         if (q_was_packing)
3748                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3749                 }
3750
3751                 spin_unlock(&queue->lock);
3752         }
3753 }
3754
3755 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3756 {
3757         struct qeth_card *card = (struct qeth_card *)card_ptr;
3758
3759         napi_schedule_irqoff(&card->napi);
3760 }
3761
3762 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3763 {
3764         int rc;
3765
3766         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3767                 rc = -1;
3768                 goto out;
3769         } else {
3770                 if (card->options.cq == cq) {
3771                         rc = 0;
3772                         goto out;
3773                 }
3774
3775                 qeth_free_qdio_queues(card);
3776                 card->options.cq = cq;
3777                 rc = 0;
3778         }
3779 out:
3780         return rc;
3781
3782 }
3783 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3784
3785 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3786                                  unsigned int queue, int first_element,
3787                                  int count)
3788 {
3789         struct qeth_qdio_q *cq = card->qdio.c_q;
3790         int i;
3791         int rc;
3792
3793         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3794         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3795         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3796
3797         if (qdio_err) {
3798                 netif_tx_stop_all_queues(card->dev);
3799                 qeth_schedule_recovery(card);
3800                 return;
3801         }
3802
3803         for (i = first_element; i < first_element + count; ++i) {
3804                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3805                 int e = 0;
3806
3807                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3808                        buffer->element[e].addr) {
3809                         unsigned long phys_aob_addr = buffer->element[e].addr;
3810
3811                         qeth_qdio_handle_aob(card, phys_aob_addr);
3812                         ++e;
3813                 }
3814                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3815         }
3816         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3817                     card->qdio.c_q->next_buf_to_init,
3818                     count);
3819         if (rc) {
3820                 dev_warn(&card->gdev->dev,
3821                         "QDIO reported an error, rc=%i\n", rc);
3822                 QETH_CARD_TEXT(card, 2, "qcqherr");
3823         }
3824
3825         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3826 }
3827
3828 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3829                                     unsigned int qdio_err, int queue,
3830                                     int first_elem, int count,
3831                                     unsigned long card_ptr)
3832 {
3833         struct qeth_card *card = (struct qeth_card *)card_ptr;
3834
3835         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3836         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3837
3838         if (qdio_err)
3839                 qeth_schedule_recovery(card);
3840 }
3841
3842 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3843                                      unsigned int qdio_error, int __queue,
3844                                      int first_element, int count,
3845                                      unsigned long card_ptr)
3846 {
3847         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3848         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3849         struct net_device *dev = card->dev;
3850         struct netdev_queue *txq;
3851         int i;
3852
3853         QETH_CARD_TEXT(card, 6, "qdouhdl");
3854         if (qdio_error & QDIO_ERROR_FATAL) {
3855                 QETH_CARD_TEXT(card, 2, "achkcond");
3856                 netif_tx_stop_all_queues(dev);
3857                 qeth_schedule_recovery(card);
3858                 return;
3859         }
3860
3861         for (i = first_element; i < (first_element + count); ++i) {
3862                 struct qeth_qdio_out_buffer *buf = queue->bufs[QDIO_BUFNR(i)];
3863
3864                 qeth_handle_send_error(card, buf, qdio_error);
3865                 qeth_clear_output_buffer(queue, buf, qdio_error, 0);
3866         }
3867
3868         atomic_sub(count, &queue->used_buffers);
3869         qeth_check_outbound_queue(queue);
3870
3871         txq = netdev_get_tx_queue(dev, __queue);
3872         /* xmit may have observed the full-condition, but not yet stopped the
3873          * txq. In which case the code below won't trigger. So before returning,
3874          * xmit will re-check the txq's fill level and wake it up if needed.
3875          */
3876         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3877                 netif_tx_wake_queue(txq);
3878 }
3879
3880 /**
3881  * Note: Function assumes that we have 4 outbound queues.
3882  */
3883 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3884 {
3885         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3886         u8 tos;
3887
3888         switch (card->qdio.do_prio_queueing) {
3889         case QETH_PRIO_Q_ING_TOS:
3890         case QETH_PRIO_Q_ING_PREC:
3891                 switch (vlan_get_protocol(skb)) {
3892                 case htons(ETH_P_IP):
3893                         tos = ipv4_get_dsfield(ip_hdr(skb));
3894                         break;
3895                 case htons(ETH_P_IPV6):
3896                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3897                         break;
3898                 default:
3899                         return card->qdio.default_out_queue;
3900                 }
3901                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3902                         return ~tos >> 6 & 3;
3903                 if (tos & IPTOS_MINCOST)
3904                         return 3;
3905                 if (tos & IPTOS_RELIABILITY)
3906                         return 2;
3907                 if (tos & IPTOS_THROUGHPUT)
3908                         return 1;
3909                 if (tos & IPTOS_LOWDELAY)
3910                         return 0;
3911                 break;
3912         case QETH_PRIO_Q_ING_SKB:
3913                 if (skb->priority > 5)
3914                         return 0;
3915                 return ~skb->priority >> 1 & 3;
3916         case QETH_PRIO_Q_ING_VLAN:
3917                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3918                         return ~ntohs(veth->h_vlan_TCI) >>
3919                                (VLAN_PRIO_SHIFT + 1) & 3;
3920                 break;
3921         case QETH_PRIO_Q_ING_FIXED:
3922                 return card->qdio.default_out_queue;
3923         default:
3924                 break;
3925         }
3926         return card->qdio.default_out_queue;
3927 }
3928 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3929
3930 /**
3931  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3932  * @skb:                                SKB address
3933  *
3934  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3935  * fragmented part of the SKB. Returns zero for linear SKB.
3936  */
3937 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3938 {
3939         int cnt, elements = 0;
3940
3941         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3942                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3943
3944                 elements += qeth_get_elements_for_range(
3945                         (addr_t)skb_frag_address(frag),
3946                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3947         }
3948         return elements;
3949 }
3950
3951 /**
3952  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3953  *                              to transmit an skb.
3954  * @skb:                        the skb to operate on.
3955  * @data_offset:                skip this part of the skb's linear data
3956  *
3957  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3958  * skb's data (both its linear part and paged fragments).
3959  */
3960 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3961 {
3962         unsigned int elements = qeth_get_elements_for_frags(skb);
3963         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3964         addr_t start = (addr_t)skb->data + data_offset;
3965
3966         if (start != end)
3967                 elements += qeth_get_elements_for_range(start, end);
3968         return elements;
3969 }
3970 EXPORT_SYMBOL_GPL(qeth_count_elements);
3971
3972 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3973                                          MAX_TCP_HEADER)
3974
3975 /**
3976  * qeth_add_hw_header() - add a HW header to an skb.
3977  * @skb: skb that the HW header should be added to.
3978  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3979  *       it contains a valid pointer to a qeth_hdr.
3980  * @hdr_len: length of the HW header.
3981  * @proto_len: length of protocol headers that need to be in same page as the
3982  *             HW header.
3983  *
3984  * Returns the pushed length. If the header can't be pushed on
3985  * (eg. because it would cross a page boundary), it is allocated from
3986  * the cache instead and 0 is returned.
3987  * The number of needed buffer elements is returned in @elements.
3988  * Error to create the hdr is indicated by returning with < 0.
3989  */
3990 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3991                               struct sk_buff *skb, struct qeth_hdr **hdr,
3992                               unsigned int hdr_len, unsigned int proto_len,
3993                               unsigned int *elements)
3994 {
3995         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3996         const unsigned int contiguous = proto_len ? proto_len : 1;
3997         const unsigned int max_elements = queue->max_elements;
3998         unsigned int __elements;
3999         addr_t start, end;
4000         bool push_ok;
4001         int rc;
4002
4003 check_layout:
4004         start = (addr_t)skb->data - hdr_len;
4005         end = (addr_t)skb->data;
4006
4007         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
4008                 /* Push HW header into same page as first protocol header. */
4009                 push_ok = true;
4010                 /* ... but TSO always needs a separate element for headers: */
4011                 if (skb_is_gso(skb))
4012                         __elements = 1 + qeth_count_elements(skb, proto_len);
4013                 else
4014                         __elements = qeth_count_elements(skb, 0);
4015         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
4016                 /* Push HW header into preceding page, flush with skb->data. */
4017                 push_ok = true;
4018                 __elements = 1 + qeth_count_elements(skb, 0);
4019         } else {
4020                 /* Use header cache, copy protocol headers up. */
4021                 push_ok = false;
4022                 __elements = 1 + qeth_count_elements(skb, proto_len);
4023         }
4024
4025         /* Compress skb to fit into one IO buffer: */
4026         if (__elements > max_elements) {
4027                 if (!skb_is_nonlinear(skb)) {
4028                         /* Drop it, no easy way of shrinking it further. */
4029                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
4030                                          max_elements, __elements, skb->len);
4031                         return -E2BIG;
4032                 }
4033
4034                 rc = skb_linearize(skb);
4035                 if (rc) {
4036                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4037                         return rc;
4038                 }
4039
4040                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4041                 /* Linearization changed the layout, re-evaluate: */
4042                 goto check_layout;
4043         }
4044
4045         *elements = __elements;
4046         /* Add the header: */
4047         if (push_ok) {
4048                 *hdr = skb_push(skb, hdr_len);
4049                 return hdr_len;
4050         }
4051
4052         /* Fall back to cache element with known-good alignment: */
4053         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4054                 return -E2BIG;
4055         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4056         if (!*hdr)
4057                 return -ENOMEM;
4058         /* Copy protocol headers behind HW header: */
4059         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4060         return 0;
4061 }
4062
4063 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4064                               struct sk_buff *curr_skb,
4065                               struct qeth_hdr *curr_hdr)
4066 {
4067         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4068         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4069
4070         if (!prev_hdr)
4071                 return true;
4072
4073         /* All packets must have the same target: */
4074         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4075                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4076
4077                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4078                                         eth_hdr(curr_skb)->h_dest) &&
4079                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4080         }
4081
4082         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4083                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4084 }
4085
4086 /**
4087  * qeth_fill_buffer() - map skb into an output buffer
4088  * @buf:        buffer to transport the skb
4089  * @skb:        skb to map into the buffer
4090  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4091  *              from qeth_core_header_cache.
4092  * @offset:     when mapping the skb, start at skb->data + offset
4093  * @hd_len:     if > 0, build a dedicated header element of this size
4094  */
4095 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4096                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4097                                      unsigned int offset, unsigned int hd_len)
4098 {
4099         struct qdio_buffer *buffer = buf->buffer;
4100         int element = buf->next_element_to_fill;
4101         int length = skb_headlen(skb) - offset;
4102         char *data = skb->data + offset;
4103         unsigned int elem_length, cnt;
4104         bool is_first_elem = true;
4105
4106         __skb_queue_tail(&buf->skb_list, skb);
4107
4108         /* build dedicated element for HW Header */
4109         if (hd_len) {
4110                 is_first_elem = false;
4111
4112                 buffer->element[element].addr = virt_to_phys(hdr);
4113                 buffer->element[element].length = hd_len;
4114                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4115
4116                 /* HW header is allocated from cache: */
4117                 if ((void *)hdr != skb->data)
4118                         buf->is_header[element] = 1;
4119                 /* HW header was pushed and is contiguous with linear part: */
4120                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4121                          (data == (char *)hdr + hd_len))
4122                         buffer->element[element].eflags |=
4123                                 SBAL_EFLAGS_CONTIGUOUS;
4124
4125                 element++;
4126         }
4127
4128         /* map linear part into buffer element(s) */
4129         while (length > 0) {
4130                 elem_length = min_t(unsigned int, length,
4131                                     PAGE_SIZE - offset_in_page(data));
4132
4133                 buffer->element[element].addr = virt_to_phys(data);
4134                 buffer->element[element].length = elem_length;
4135                 length -= elem_length;
4136                 if (is_first_elem) {
4137                         is_first_elem = false;
4138                         if (length || skb_is_nonlinear(skb))
4139                                 /* skb needs additional elements */
4140                                 buffer->element[element].eflags =
4141                                         SBAL_EFLAGS_FIRST_FRAG;
4142                         else
4143                                 buffer->element[element].eflags = 0;
4144                 } else {
4145                         buffer->element[element].eflags =
4146                                 SBAL_EFLAGS_MIDDLE_FRAG;
4147                 }
4148
4149                 data += elem_length;
4150                 element++;
4151         }
4152
4153         /* map page frags into buffer element(s) */
4154         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4155                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4156
4157                 data = skb_frag_address(frag);
4158                 length = skb_frag_size(frag);
4159                 while (length > 0) {
4160                         elem_length = min_t(unsigned int, length,
4161                                             PAGE_SIZE - offset_in_page(data));
4162
4163                         buffer->element[element].addr = virt_to_phys(data);
4164                         buffer->element[element].length = elem_length;
4165                         buffer->element[element].eflags =
4166                                 SBAL_EFLAGS_MIDDLE_FRAG;
4167
4168                         length -= elem_length;
4169                         data += elem_length;
4170                         element++;
4171                 }
4172         }
4173
4174         if (buffer->element[element - 1].eflags)
4175                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4176         buf->next_element_to_fill = element;
4177         return element;
4178 }
4179
4180 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4181                        struct sk_buff *skb, unsigned int elements,
4182                        struct qeth_hdr *hdr, unsigned int offset,
4183                        unsigned int hd_len)
4184 {
4185         unsigned int bytes = qdisc_pkt_len(skb);
4186         struct qeth_qdio_out_buffer *buffer;
4187         unsigned int next_element;
4188         struct netdev_queue *txq;
4189         bool stopped = false;
4190         bool flush;
4191
4192         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4193         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4194
4195         /* Just a sanity check, the wake/stop logic should ensure that we always
4196          * get a free buffer.
4197          */
4198         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4199                 return -EBUSY;
4200
4201         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4202
4203         if (flush ||
4204             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4205                 if (buffer->next_element_to_fill > 0) {
4206                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4207                         queue->bulk_count++;
4208                 }
4209
4210                 if (queue->bulk_count >= queue->bulk_max)
4211                         flush = true;
4212
4213                 if (flush)
4214                         qeth_flush_queue(queue);
4215
4216                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4217                                                 queue->bulk_count)];
4218
4219                 /* Sanity-check again: */
4220                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4221                         return -EBUSY;
4222         }
4223
4224         if (buffer->next_element_to_fill == 0 &&
4225             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4226                 /* If a TX completion happens right _here_ and misses to wake
4227                  * the txq, then our re-check below will catch the race.
4228                  */
4229                 QETH_TXQ_STAT_INC(queue, stopped);
4230                 netif_tx_stop_queue(txq);
4231                 stopped = true;
4232         }
4233
4234         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4235         buffer->bytes += bytes;
4236         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4237         queue->prev_hdr = hdr;
4238
4239         flush = __netdev_tx_sent_queue(txq, bytes,
4240                                        !stopped && netdev_xmit_more());
4241
4242         if (flush || next_element >= queue->max_elements) {
4243                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4244                 queue->bulk_count++;
4245
4246                 if (queue->bulk_count >= queue->bulk_max)
4247                         flush = true;
4248
4249                 if (flush)
4250                         qeth_flush_queue(queue);
4251         }
4252
4253         if (stopped && !qeth_out_queue_is_full(queue))
4254                 netif_tx_start_queue(txq);
4255         return 0;
4256 }
4257
4258 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4259                         struct sk_buff *skb, struct qeth_hdr *hdr,
4260                         unsigned int offset, unsigned int hd_len,
4261                         int elements_needed)
4262 {
4263         unsigned int start_index = queue->next_buf_to_fill;
4264         struct qeth_qdio_out_buffer *buffer;
4265         unsigned int next_element;
4266         struct netdev_queue *txq;
4267         bool stopped = false;
4268         int flush_count = 0;
4269         int do_pack = 0;
4270         int rc = 0;
4271
4272         buffer = queue->bufs[queue->next_buf_to_fill];
4273
4274         /* Just a sanity check, the wake/stop logic should ensure that we always
4275          * get a free buffer.
4276          */
4277         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4278                 return -EBUSY;
4279
4280         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4281
4282         /* check if we need to switch packing state of this queue */
4283         qeth_switch_to_packing_if_needed(queue);
4284         if (queue->do_pack) {
4285                 do_pack = 1;
4286                 /* does packet fit in current buffer? */
4287                 if (buffer->next_element_to_fill + elements_needed >
4288                     queue->max_elements) {
4289                         /* ... no -> set state PRIMED */
4290                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4291                         flush_count++;
4292                         queue->next_buf_to_fill =
4293                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4294                         buffer = queue->bufs[queue->next_buf_to_fill];
4295
4296                         /* We stepped forward, so sanity-check again: */
4297                         if (atomic_read(&buffer->state) !=
4298                             QETH_QDIO_BUF_EMPTY) {
4299                                 qeth_flush_buffers(queue, start_index,
4300                                                            flush_count);
4301                                 rc = -EBUSY;
4302                                 goto out;
4303                         }
4304                 }
4305         }
4306
4307         if (buffer->next_element_to_fill == 0 &&
4308             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4309                 /* If a TX completion happens right _here_ and misses to wake
4310                  * the txq, then our re-check below will catch the race.
4311                  */
4312                 QETH_TXQ_STAT_INC(queue, stopped);
4313                 netif_tx_stop_queue(txq);
4314                 stopped = true;
4315         }
4316
4317         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4318         buffer->bytes += qdisc_pkt_len(skb);
4319         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4320
4321         if (queue->do_pack)
4322                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4323         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4324                 flush_count++;
4325                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4326                 queue->next_buf_to_fill =
4327                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4328         }
4329
4330         if (flush_count)
4331                 qeth_flush_buffers(queue, start_index, flush_count);
4332
4333 out:
4334         if (do_pack)
4335                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4336
4337         if (stopped && !qeth_out_queue_is_full(queue))
4338                 netif_tx_start_queue(txq);
4339         return rc;
4340 }
4341 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4342
4343 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4344                               unsigned int payload_len, struct sk_buff *skb,
4345                               unsigned int proto_len)
4346 {
4347         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4348
4349         ext->hdr_tot_len = sizeof(*ext);
4350         ext->imb_hdr_no = 1;
4351         ext->hdr_type = 1;
4352         ext->hdr_version = 1;
4353         ext->hdr_len = 28;
4354         ext->payload_len = payload_len;
4355         ext->mss = skb_shinfo(skb)->gso_size;
4356         ext->dg_hdr_len = proto_len;
4357 }
4358
4359 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4360               struct qeth_qdio_out_q *queue, __be16 proto,
4361               void (*fill_header)(struct qeth_qdio_out_q *queue,
4362                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4363                                   __be16 proto, unsigned int data_len))
4364 {
4365         unsigned int proto_len, hw_hdr_len;
4366         unsigned int frame_len = skb->len;
4367         bool is_tso = skb_is_gso(skb);
4368         unsigned int data_offset = 0;
4369         struct qeth_hdr *hdr = NULL;
4370         unsigned int hd_len = 0;
4371         unsigned int elements;
4372         int push_len, rc;
4373
4374         if (is_tso) {
4375                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4376                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4377         } else {
4378                 hw_hdr_len = sizeof(struct qeth_hdr);
4379                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4380         }
4381
4382         rc = skb_cow_head(skb, hw_hdr_len);
4383         if (rc)
4384                 return rc;
4385
4386         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4387                                       &elements);
4388         if (push_len < 0)
4389                 return push_len;
4390         if (is_tso || !push_len) {
4391                 /* HW header needs its own buffer element. */
4392                 hd_len = hw_hdr_len + proto_len;
4393                 data_offset = push_len + proto_len;
4394         }
4395         memset(hdr, 0, hw_hdr_len);
4396         fill_header(queue, hdr, skb, proto, frame_len);
4397         if (is_tso)
4398                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4399                                   frame_len - proto_len, skb, proto_len);
4400
4401         if (IS_IQD(card)) {
4402                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4403                                  hd_len);
4404         } else {
4405                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4406                 skb_orphan(skb);
4407                 spin_lock(&queue->lock);
4408                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4409                                          hd_len, elements);
4410                 spin_unlock(&queue->lock);
4411         }
4412
4413         if (rc && !push_len)
4414                 kmem_cache_free(qeth_core_header_cache, hdr);
4415
4416         return rc;
4417 }
4418 EXPORT_SYMBOL_GPL(qeth_xmit);
4419
4420 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4421                 struct qeth_reply *reply, unsigned long data)
4422 {
4423         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4424         struct qeth_ipacmd_setadpparms *setparms;
4425
4426         QETH_CARD_TEXT(card, 4, "prmadpcb");
4427
4428         setparms = &(cmd->data.setadapterparms);
4429         if (qeth_setadpparms_inspect_rc(cmd)) {
4430                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4431                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4432         }
4433         card->info.promisc_mode = setparms->data.mode;
4434         return (cmd->hdr.return_code) ? -EIO : 0;
4435 }
4436
4437 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4438 {
4439         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4440                                                     SET_PROMISC_MODE_OFF;
4441         struct qeth_cmd_buffer *iob;
4442         struct qeth_ipa_cmd *cmd;
4443
4444         QETH_CARD_TEXT(card, 4, "setprom");
4445         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4446
4447         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4448                                    SETADP_DATA_SIZEOF(mode));
4449         if (!iob)
4450                 return;
4451         cmd = __ipa_cmd(iob);
4452         cmd->data.setadapterparms.data.mode = mode;
4453         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4454 }
4455 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4456
4457 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4458                 struct qeth_reply *reply, unsigned long data)
4459 {
4460         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4461         struct qeth_ipacmd_setadpparms *adp_cmd;
4462
4463         QETH_CARD_TEXT(card, 4, "chgmaccb");
4464         if (qeth_setadpparms_inspect_rc(cmd))
4465                 return -EIO;
4466
4467         adp_cmd = &cmd->data.setadapterparms;
4468         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4469                 return -EADDRNOTAVAIL;
4470
4471         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4472             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4473                 return -EADDRNOTAVAIL;
4474
4475         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4476         return 0;
4477 }
4478
4479 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4480 {
4481         int rc;
4482         struct qeth_cmd_buffer *iob;
4483         struct qeth_ipa_cmd *cmd;
4484
4485         QETH_CARD_TEXT(card, 4, "chgmac");
4486
4487         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4488                                    SETADP_DATA_SIZEOF(change_addr));
4489         if (!iob)
4490                 return -ENOMEM;
4491         cmd = __ipa_cmd(iob);
4492         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4493         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4494         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4495                         card->dev->dev_addr);
4496         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4497                                NULL);
4498         return rc;
4499 }
4500 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4501
4502 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4503                 struct qeth_reply *reply, unsigned long data)
4504 {
4505         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4506         struct qeth_set_access_ctrl *access_ctrl_req;
4507
4508         QETH_CARD_TEXT(card, 4, "setaccb");
4509
4510         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4511         QETH_CARD_TEXT_(card, 2, "rc=%d",
4512                         cmd->data.setadapterparms.hdr.return_code);
4513         if (cmd->data.setadapterparms.hdr.return_code !=
4514                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4515                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4516                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4517                                  cmd->data.setadapterparms.hdr.return_code);
4518         switch (qeth_setadpparms_inspect_rc(cmd)) {
4519         case SET_ACCESS_CTRL_RC_SUCCESS:
4520                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4521                         dev_info(&card->gdev->dev,
4522                             "QDIO data connection isolation is deactivated\n");
4523                 else
4524                         dev_info(&card->gdev->dev,
4525                             "QDIO data connection isolation is activated\n");
4526                 return 0;
4527         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4528                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4529                                  CARD_DEVID(card));
4530                 return 0;
4531         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4532                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4533                                  CARD_DEVID(card));
4534                 return 0;
4535         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4536                 dev_err(&card->gdev->dev, "Adapter does not "
4537                         "support QDIO data connection isolation\n");
4538                 return -EOPNOTSUPP;
4539         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4540                 dev_err(&card->gdev->dev,
4541                         "Adapter is dedicated. "
4542                         "QDIO data connection isolation not supported\n");
4543                 return -EOPNOTSUPP;
4544         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4545                 dev_err(&card->gdev->dev,
4546                         "TSO does not permit QDIO data connection isolation\n");
4547                 return -EPERM;
4548         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4549                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4550                         "support reflective relay mode\n");
4551                 return -EOPNOTSUPP;
4552         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4553                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4554                                         "enabled at the adjacent switch port");
4555                 return -EREMOTEIO;
4556         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4557                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4558                                         "at the adjacent switch failed\n");
4559                 /* benign error while disabling ISOLATION_MODE_FWD */
4560                 return 0;
4561         default:
4562                 return -EIO;
4563         }
4564 }
4565
4566 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4567                                      enum qeth_ipa_isolation_modes mode)
4568 {
4569         int rc;
4570         struct qeth_cmd_buffer *iob;
4571         struct qeth_ipa_cmd *cmd;
4572         struct qeth_set_access_ctrl *access_ctrl_req;
4573
4574         QETH_CARD_TEXT(card, 4, "setacctl");
4575
4576         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4577                 dev_err(&card->gdev->dev,
4578                         "Adapter does not support QDIO data connection isolation\n");
4579                 return -EOPNOTSUPP;
4580         }
4581
4582         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4583                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4584         if (!iob)
4585                 return -ENOMEM;
4586         cmd = __ipa_cmd(iob);
4587         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4588         access_ctrl_req->subcmd_code = mode;
4589
4590         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4591                                NULL);
4592         if (rc) {
4593                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4594                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4595                                  rc, CARD_DEVID(card));
4596         }
4597
4598         return rc;
4599 }
4600
4601 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4602 {
4603         struct qeth_card *card;
4604
4605         card = dev->ml_priv;
4606         QETH_CARD_TEXT(card, 4, "txtimeo");
4607         qeth_schedule_recovery(card);
4608 }
4609 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4610
4611 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4612 {
4613         struct qeth_card *card = dev->ml_priv;
4614         int rc = 0;
4615
4616         switch (regnum) {
4617         case MII_BMCR: /* Basic mode control register */
4618                 rc = BMCR_FULLDPLX;
4619                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4620                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4621                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4622                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4623                         rc |= BMCR_SPEED100;
4624                 break;
4625         case MII_BMSR: /* Basic mode status register */
4626                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4627                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4628                      BMSR_100BASE4;
4629                 break;
4630         case MII_PHYSID1: /* PHYS ID 1 */
4631                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4632                      dev->dev_addr[2];
4633                 rc = (rc >> 5) & 0xFFFF;
4634                 break;
4635         case MII_PHYSID2: /* PHYS ID 2 */
4636                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4637                 break;
4638         case MII_ADVERTISE: /* Advertisement control reg */
4639                 rc = ADVERTISE_ALL;
4640                 break;
4641         case MII_LPA: /* Link partner ability reg */
4642                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4643                      LPA_100BASE4 | LPA_LPACK;
4644                 break;
4645         case MII_EXPANSION: /* Expansion register */
4646                 break;
4647         case MII_DCOUNTER: /* disconnect counter */
4648                 break;
4649         case MII_FCSCOUNTER: /* false carrier counter */
4650                 break;
4651         case MII_NWAYTEST: /* N-way auto-neg test register */
4652                 break;
4653         case MII_RERRCOUNTER: /* rx error counter */
4654                 rc = card->stats.rx_length_errors +
4655                      card->stats.rx_frame_errors +
4656                      card->stats.rx_fifo_errors;
4657                 break;
4658         case MII_SREVISION: /* silicon revision */
4659                 break;
4660         case MII_RESV1: /* reserved 1 */
4661                 break;
4662         case MII_LBRERROR: /* loopback, rx, bypass error */
4663                 break;
4664         case MII_PHYADDR: /* physical address */
4665                 break;
4666         case MII_RESV2: /* reserved 2 */
4667                 break;
4668         case MII_TPISTATUS: /* TPI status for 10mbps */
4669                 break;
4670         case MII_NCONFIG: /* network interface config */
4671                 break;
4672         default:
4673                 break;
4674         }
4675         return rc;
4676 }
4677
4678 static int qeth_snmp_command_cb(struct qeth_card *card,
4679                                 struct qeth_reply *reply, unsigned long data)
4680 {
4681         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4682         struct qeth_arp_query_info *qinfo = reply->param;
4683         struct qeth_ipacmd_setadpparms *adp_cmd;
4684         unsigned int data_len;
4685         void *snmp_data;
4686
4687         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4688
4689         if (cmd->hdr.return_code) {
4690                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4691                 return -EIO;
4692         }
4693         if (cmd->data.setadapterparms.hdr.return_code) {
4694                 cmd->hdr.return_code =
4695                         cmd->data.setadapterparms.hdr.return_code;
4696                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4697                 return -EIO;
4698         }
4699
4700         adp_cmd = &cmd->data.setadapterparms;
4701         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4702         if (adp_cmd->hdr.seq_no == 1) {
4703                 snmp_data = &adp_cmd->data.snmp;
4704         } else {
4705                 snmp_data = &adp_cmd->data.snmp.request;
4706                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4707         }
4708
4709         /* check if there is enough room in userspace */
4710         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4711                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4712                 return -ENOSPC;
4713         }
4714         QETH_CARD_TEXT_(card, 4, "snore%i",
4715                         cmd->data.setadapterparms.hdr.used_total);
4716         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4717                         cmd->data.setadapterparms.hdr.seq_no);
4718         /*copy entries to user buffer*/
4719         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4720         qinfo->udata_offset += data_len;
4721
4722         if (cmd->data.setadapterparms.hdr.seq_no <
4723             cmd->data.setadapterparms.hdr.used_total)
4724                 return 1;
4725         return 0;
4726 }
4727
4728 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4729 {
4730         struct qeth_snmp_ureq __user *ureq;
4731         struct qeth_cmd_buffer *iob;
4732         unsigned int req_len;
4733         struct qeth_arp_query_info qinfo = {0, };
4734         int rc = 0;
4735
4736         QETH_CARD_TEXT(card, 3, "snmpcmd");
4737
4738         if (IS_VM_NIC(card))
4739                 return -EOPNOTSUPP;
4740
4741         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4742             IS_LAYER3(card))
4743                 return -EOPNOTSUPP;
4744
4745         ureq = (struct qeth_snmp_ureq __user *) udata;
4746         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4747             get_user(req_len, &ureq->hdr.req_len))
4748                 return -EFAULT;
4749
4750         /* Sanitize user input, to avoid overflows in iob size calculation: */
4751         if (req_len > QETH_BUFSIZE)
4752                 return -EINVAL;
4753
4754         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4755         if (!iob)
4756                 return -ENOMEM;
4757
4758         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4759                            &ureq->cmd, req_len)) {
4760                 qeth_put_cmd(iob);
4761                 return -EFAULT;
4762         }
4763
4764         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4765         if (!qinfo.udata) {
4766                 qeth_put_cmd(iob);
4767                 return -ENOMEM;
4768         }
4769         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4770
4771         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4772         if (rc)
4773                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4774                                  CARD_DEVID(card), rc);
4775         else {
4776                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4777                         rc = -EFAULT;
4778         }
4779
4780         kfree(qinfo.udata);
4781         return rc;
4782 }
4783
4784 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4785                                          struct qeth_reply *reply,
4786                                          unsigned long data)
4787 {
4788         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4789         struct qeth_qoat_priv *priv = reply->param;
4790         int resdatalen;
4791
4792         QETH_CARD_TEXT(card, 3, "qoatcb");
4793         if (qeth_setadpparms_inspect_rc(cmd))
4794                 return -EIO;
4795
4796         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4797
4798         if (resdatalen > (priv->buffer_len - priv->response_len))
4799                 return -ENOSPC;
4800
4801         memcpy(priv->buffer + priv->response_len,
4802                &cmd->data.setadapterparms.hdr, resdatalen);
4803         priv->response_len += resdatalen;
4804
4805         if (cmd->data.setadapterparms.hdr.seq_no <
4806             cmd->data.setadapterparms.hdr.used_total)
4807                 return 1;
4808         return 0;
4809 }
4810
4811 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4812 {
4813         int rc = 0;
4814         struct qeth_cmd_buffer *iob;
4815         struct qeth_ipa_cmd *cmd;
4816         struct qeth_query_oat *oat_req;
4817         struct qeth_query_oat_data oat_data;
4818         struct qeth_qoat_priv priv;
4819         void __user *tmp;
4820
4821         QETH_CARD_TEXT(card, 3, "qoatcmd");
4822
4823         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4824                 return -EOPNOTSUPP;
4825
4826         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4827                 return -EFAULT;
4828
4829         priv.buffer_len = oat_data.buffer_len;
4830         priv.response_len = 0;
4831         priv.buffer = vzalloc(oat_data.buffer_len);
4832         if (!priv.buffer)
4833                 return -ENOMEM;
4834
4835         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4836                                    SETADP_DATA_SIZEOF(query_oat));
4837         if (!iob) {
4838                 rc = -ENOMEM;
4839                 goto out_free;
4840         }
4841         cmd = __ipa_cmd(iob);
4842         oat_req = &cmd->data.setadapterparms.data.query_oat;
4843         oat_req->subcmd_code = oat_data.command;
4844
4845         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4846         if (!rc) {
4847                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4848                                          u64_to_user_ptr(oat_data.ptr);
4849                 oat_data.response_len = priv.response_len;
4850
4851                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4852                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4853                         rc = -EFAULT;
4854         }
4855
4856 out_free:
4857         vfree(priv.buffer);
4858         return rc;
4859 }
4860
4861 static int qeth_query_card_info_cb(struct qeth_card *card,
4862                                    struct qeth_reply *reply, unsigned long data)
4863 {
4864         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4865         struct qeth_link_info *link_info = reply->param;
4866         struct qeth_query_card_info *card_info;
4867
4868         QETH_CARD_TEXT(card, 2, "qcrdincb");
4869         if (qeth_setadpparms_inspect_rc(cmd))
4870                 return -EIO;
4871
4872         card_info = &cmd->data.setadapterparms.data.card_info;
4873         netdev_dbg(card->dev,
4874                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4875                    card_info->card_type, card_info->port_mode,
4876                    card_info->port_speed);
4877
4878         switch (card_info->port_mode) {
4879         case CARD_INFO_PORTM_FULLDUPLEX:
4880                 link_info->duplex = DUPLEX_FULL;
4881                 break;
4882         case CARD_INFO_PORTM_HALFDUPLEX:
4883                 link_info->duplex = DUPLEX_HALF;
4884                 break;
4885         default:
4886                 link_info->duplex = DUPLEX_UNKNOWN;
4887         }
4888
4889         switch (card_info->card_type) {
4890         case CARD_INFO_TYPE_1G_COPPER_A:
4891         case CARD_INFO_TYPE_1G_COPPER_B:
4892                 link_info->speed = SPEED_1000;
4893                 link_info->port = PORT_TP;
4894                 break;
4895         case CARD_INFO_TYPE_1G_FIBRE_A:
4896         case CARD_INFO_TYPE_1G_FIBRE_B:
4897                 link_info->speed = SPEED_1000;
4898                 link_info->port = PORT_FIBRE;
4899                 break;
4900         case CARD_INFO_TYPE_10G_FIBRE_A:
4901         case CARD_INFO_TYPE_10G_FIBRE_B:
4902                 link_info->speed = SPEED_10000;
4903                 link_info->port = PORT_FIBRE;
4904                 break;
4905         default:
4906                 switch (card_info->port_speed) {
4907                 case CARD_INFO_PORTS_10M:
4908                         link_info->speed = SPEED_10;
4909                         break;
4910                 case CARD_INFO_PORTS_100M:
4911                         link_info->speed = SPEED_100;
4912                         break;
4913                 case CARD_INFO_PORTS_1G:
4914                         link_info->speed = SPEED_1000;
4915                         break;
4916                 case CARD_INFO_PORTS_10G:
4917                         link_info->speed = SPEED_10000;
4918                         break;
4919                 case CARD_INFO_PORTS_25G:
4920                         link_info->speed = SPEED_25000;
4921                         break;
4922                 default:
4923                         link_info->speed = SPEED_UNKNOWN;
4924                 }
4925
4926                 link_info->port = PORT_OTHER;
4927         }
4928
4929         return 0;
4930 }
4931
4932 int qeth_query_card_info(struct qeth_card *card,
4933                          struct qeth_link_info *link_info)
4934 {
4935         struct qeth_cmd_buffer *iob;
4936
4937         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4938         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4939                 return -EOPNOTSUPP;
4940         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4941         if (!iob)
4942                 return -ENOMEM;
4943
4944         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4945 }
4946
4947 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4948                                       struct qeth_reply *reply_priv,
4949                                       unsigned long data)
4950 {
4951         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4952         struct qeth_link_info *link_info = reply_priv->param;
4953         struct qeth_query_oat_physical_if *phys_if;
4954         struct qeth_query_oat_reply *reply;
4955
4956         if (qeth_setadpparms_inspect_rc(cmd))
4957                 return -EIO;
4958
4959         /* Multi-part reply is unexpected, don't bother: */
4960         if (cmd->data.setadapterparms.hdr.used_total > 1)
4961                 return -EINVAL;
4962
4963         /* Expect the reply to start with phys_if data: */
4964         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4965         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4966             reply->length < sizeof(*reply))
4967                 return -EINVAL;
4968
4969         phys_if = &reply->phys_if;
4970
4971         switch (phys_if->speed_duplex) {
4972         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4973                 link_info->speed = SPEED_10;
4974                 link_info->duplex = DUPLEX_HALF;
4975                 break;
4976         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4977                 link_info->speed = SPEED_10;
4978                 link_info->duplex = DUPLEX_FULL;
4979                 break;
4980         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4981                 link_info->speed = SPEED_100;
4982                 link_info->duplex = DUPLEX_HALF;
4983                 break;
4984         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4985                 link_info->speed = SPEED_100;
4986                 link_info->duplex = DUPLEX_FULL;
4987                 break;
4988         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4989                 link_info->speed = SPEED_1000;
4990                 link_info->duplex = DUPLEX_HALF;
4991                 break;
4992         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4993                 link_info->speed = SPEED_1000;
4994                 link_info->duplex = DUPLEX_FULL;
4995                 break;
4996         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4997                 link_info->speed = SPEED_10000;
4998                 link_info->duplex = DUPLEX_FULL;
4999                 break;
5000         case QETH_QOAT_PHYS_SPEED_25G_FULL:
5001                 link_info->speed = SPEED_25000;
5002                 link_info->duplex = DUPLEX_FULL;
5003                 break;
5004         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
5005         default:
5006                 link_info->speed = SPEED_UNKNOWN;
5007                 link_info->duplex = DUPLEX_UNKNOWN;
5008                 break;
5009         }
5010
5011         switch (phys_if->media_type) {
5012         case QETH_QOAT_PHYS_MEDIA_COPPER:
5013                 link_info->port = PORT_TP;
5014                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5015                 break;
5016         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
5017                 link_info->port = PORT_FIBRE;
5018                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5019                 break;
5020         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
5021                 link_info->port = PORT_FIBRE;
5022                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
5023                 break;
5024         default:
5025                 link_info->port = PORT_OTHER;
5026                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
5027                 break;
5028         }
5029
5030         return 0;
5031 }
5032
5033 static void qeth_init_link_info(struct qeth_card *card)
5034 {
5035         card->info.link_info.duplex = DUPLEX_FULL;
5036
5037         if (IS_IQD(card) || IS_VM_NIC(card)) {
5038                 card->info.link_info.speed = SPEED_10000;
5039                 card->info.link_info.port = PORT_FIBRE;
5040                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
5041         } else {
5042                 switch (card->info.link_type) {
5043                 case QETH_LINK_TYPE_FAST_ETH:
5044                 case QETH_LINK_TYPE_LANE_ETH100:
5045                         card->info.link_info.speed = SPEED_100;
5046                         card->info.link_info.port = PORT_TP;
5047                         break;
5048                 case QETH_LINK_TYPE_GBIT_ETH:
5049                 case QETH_LINK_TYPE_LANE_ETH1000:
5050                         card->info.link_info.speed = SPEED_1000;
5051                         card->info.link_info.port = PORT_FIBRE;
5052                         break;
5053                 case QETH_LINK_TYPE_10GBIT_ETH:
5054                         card->info.link_info.speed = SPEED_10000;
5055                         card->info.link_info.port = PORT_FIBRE;
5056                         break;
5057                 case QETH_LINK_TYPE_25GBIT_ETH:
5058                         card->info.link_info.speed = SPEED_25000;
5059                         card->info.link_info.port = PORT_FIBRE;
5060                         break;
5061                 default:
5062                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
5063                                  card->info.link_type);
5064                         card->info.link_info.speed = SPEED_UNKNOWN;
5065                         card->info.link_info.port = PORT_OTHER;
5066                 }
5067
5068                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
5069         }
5070
5071         /* Get more accurate data via QUERY OAT: */
5072         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
5073                 struct qeth_link_info link_info;
5074                 struct qeth_cmd_buffer *iob;
5075
5076                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
5077                                            SETADP_DATA_SIZEOF(query_oat));
5078                 if (iob) {
5079                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
5080                         struct qeth_query_oat *oat_req;
5081
5082                         oat_req = &cmd->data.setadapterparms.data.query_oat;
5083                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
5084
5085                         if (!qeth_send_ipa_cmd(card, iob,
5086                                                qeth_init_link_info_oat_cb,
5087                                                &link_info)) {
5088                                 if (link_info.speed != SPEED_UNKNOWN)
5089                                         card->info.link_info.speed = link_info.speed;
5090                                 if (link_info.duplex != DUPLEX_UNKNOWN)
5091                                         card->info.link_info.duplex = link_info.duplex;
5092                                 if (link_info.port != PORT_OTHER)
5093                                         card->info.link_info.port = link_info.port;
5094                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
5095                                         card->info.link_info.link_mode = link_info.link_mode;
5096                         }
5097                 }
5098         }
5099 }
5100
5101 /**
5102  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5103  * @card: pointer to a qeth_card
5104  *
5105  * Returns
5106  *      0, if a MAC address has been set for the card's netdevice
5107  *      a return code, for various error conditions
5108  */
5109 int qeth_vm_request_mac(struct qeth_card *card)
5110 {
5111         struct diag26c_mac_resp *response;
5112         struct diag26c_mac_req *request;
5113         int rc;
5114
5115         QETH_CARD_TEXT(card, 2, "vmreqmac");
5116
5117         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5118         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5119         if (!request || !response) {
5120                 rc = -ENOMEM;
5121                 goto out;
5122         }
5123
5124         request->resp_buf_len = sizeof(*response);
5125         request->resp_version = DIAG26C_VERSION2;
5126         request->op_code = DIAG26C_GET_MAC;
5127         request->devno = card->info.ddev_devno;
5128
5129         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5130         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5131         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5132         if (rc)
5133                 goto out;
5134         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5135
5136         if (request->resp_buf_len < sizeof(*response) ||
5137             response->version != request->resp_version) {
5138                 rc = -EIO;
5139                 QETH_CARD_TEXT(card, 2, "badresp");
5140                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5141                               sizeof(request->resp_buf_len));
5142         } else if (!is_valid_ether_addr(response->mac)) {
5143                 rc = -EINVAL;
5144                 QETH_CARD_TEXT(card, 2, "badmac");
5145                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5146         } else {
5147                 ether_addr_copy(card->dev->dev_addr, response->mac);
5148         }
5149
5150 out:
5151         kfree(response);
5152         kfree(request);
5153         return rc;
5154 }
5155 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5156
5157 static void qeth_determine_capabilities(struct qeth_card *card)
5158 {
5159         struct qeth_channel *channel = &card->data;
5160         struct ccw_device *ddev = channel->ccwdev;
5161         int rc;
5162         int ddev_offline = 0;
5163
5164         QETH_CARD_TEXT(card, 2, "detcapab");
5165         if (!ddev->online) {
5166                 ddev_offline = 1;
5167                 rc = qeth_start_channel(channel);
5168                 if (rc) {
5169                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5170                         goto out;
5171                 }
5172         }
5173
5174         rc = qeth_read_conf_data(card);
5175         if (rc) {
5176                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5177                                  CARD_DEVID(card), rc);
5178                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5179                 goto out_offline;
5180         }
5181
5182         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5183         if (rc)
5184                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5185
5186         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5187         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5188         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5189         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5190         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5191         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5192             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5193             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5194                 dev_info(&card->gdev->dev,
5195                         "Completion Queueing supported\n");
5196         } else {
5197                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5198         }
5199
5200 out_offline:
5201         if (ddev_offline == 1)
5202                 qeth_stop_channel(channel);
5203 out:
5204         return;
5205 }
5206
5207 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5208 {
5209         struct qeth_card_info *info = &card->info;
5210         struct ccw_device *cdev = CARD_DDEV(card);
5211         struct ccw_dev_id dev_id;
5212
5213         QETH_CARD_TEXT(card, 2, "ccwconfd");
5214         ccw_device_get_id(cdev, &dev_id);
5215
5216         info->ddev_devno = dev_id.devno;
5217         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5218                           !ccw_device_get_iid(cdev, &info->iid) &&
5219                           !ccw_device_get_chid(cdev, 0, &info->chid);
5220         info->ssid = dev_id.ssid;
5221
5222         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5223                  info->chid, info->chpid);
5224
5225         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5226         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5227         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5228         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5229         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5230         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5231         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5232 }
5233
5234 static int qeth_qdio_establish(struct qeth_card *card)
5235 {
5236         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5237         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5238         struct qeth_qib_parms *qib_parms = NULL;
5239         struct qdio_initialize init_data;
5240         unsigned int i;
5241         int rc = 0;
5242
5243         QETH_CARD_TEXT(card, 2, "qdioest");
5244
5245         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5246                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5247                 if (!qib_parms)
5248                         return -ENOMEM;
5249
5250                 qeth_fill_qib_parms(card, qib_parms);
5251         }
5252
5253         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5254         if (card->options.cq == QETH_CQ_ENABLED)
5255                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5256
5257         for (i = 0; i < card->qdio.no_out_queues; i++)
5258                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5259
5260         memset(&init_data, 0, sizeof(struct qdio_initialize));
5261         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5262                                                           QDIO_QETH_QFMT;
5263         init_data.qib_param_field_format = 0;
5264         init_data.qib_param_field        = (void *)qib_parms;
5265         init_data.no_input_qs            = card->qdio.no_in_queues;
5266         init_data.no_output_qs           = card->qdio.no_out_queues;
5267         init_data.input_handler          = qeth_qdio_input_handler;
5268         init_data.output_handler         = qeth_qdio_output_handler;
5269         init_data.irq_poll               = qeth_qdio_poll;
5270         init_data.int_parm               = (unsigned long) card;
5271         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5272         init_data.output_sbal_addr_array = out_sbal_ptrs;
5273         init_data.output_sbal_state_array = card->qdio.out_bufstates;
5274         init_data.scan_threshold         = IS_IQD(card) ? 0 : 32;
5275
5276         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5277                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5278                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5279                                    init_data.no_output_qs);
5280                 if (rc) {
5281                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5282                         goto out;
5283                 }
5284                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5285                 if (rc) {
5286                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5287                         qdio_free(CARD_DDEV(card));
5288                 }
5289         }
5290
5291         switch (card->options.cq) {
5292         case QETH_CQ_ENABLED:
5293                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5294                 break;
5295         case QETH_CQ_DISABLED:
5296                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5297                 break;
5298         default:
5299                 break;
5300         }
5301
5302 out:
5303         kfree(qib_parms);
5304         return rc;
5305 }
5306
5307 static void qeth_core_free_card(struct qeth_card *card)
5308 {
5309         QETH_CARD_TEXT(card, 2, "freecrd");
5310
5311         unregister_service_level(&card->qeth_service_level);
5312         debugfs_remove_recursive(card->debugfs);
5313         qeth_put_cmd(card->read_cmd);
5314         destroy_workqueue(card->event_wq);
5315         dev_set_drvdata(&card->gdev->dev, NULL);
5316         kfree(card);
5317 }
5318
5319 static void qeth_trace_features(struct qeth_card *card)
5320 {
5321         QETH_CARD_TEXT(card, 2, "features");
5322         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5323         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5324         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5325         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5326                       sizeof(card->info.diagass_support));
5327 }
5328
5329 static struct ccw_device_id qeth_ids[] = {
5330         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5331                                         .driver_info = QETH_CARD_TYPE_OSD},
5332         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5333                                         .driver_info = QETH_CARD_TYPE_IQD},
5334 #ifdef CONFIG_QETH_OSN
5335         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5336                                         .driver_info = QETH_CARD_TYPE_OSN},
5337 #endif
5338         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5339                                         .driver_info = QETH_CARD_TYPE_OSM},
5340 #ifdef CONFIG_QETH_OSX
5341         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5342                                         .driver_info = QETH_CARD_TYPE_OSX},
5343 #endif
5344         {},
5345 };
5346 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5347
5348 static struct ccw_driver qeth_ccw_driver = {
5349         .driver = {
5350                 .owner = THIS_MODULE,
5351                 .name = "qeth",
5352         },
5353         .ids = qeth_ids,
5354         .probe = ccwgroup_probe_ccwdev,
5355         .remove = ccwgroup_remove_ccwdev,
5356 };
5357
5358 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5359 {
5360         int retries = 3;
5361         int rc;
5362
5363         QETH_CARD_TEXT(card, 2, "hrdsetup");
5364         atomic_set(&card->force_alloc_skb, 0);
5365         rc = qeth_update_from_chp_desc(card);
5366         if (rc)
5367                 return rc;
5368 retry:
5369         if (retries < 3)
5370                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5371                                  CARD_DEVID(card));
5372         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5373         qeth_stop_channel(&card->data);
5374         qeth_stop_channel(&card->write);
5375         qeth_stop_channel(&card->read);
5376         qdio_free(CARD_DDEV(card));
5377
5378         rc = qeth_start_channel(&card->read);
5379         if (rc)
5380                 goto retriable;
5381         rc = qeth_start_channel(&card->write);
5382         if (rc)
5383                 goto retriable;
5384         rc = qeth_start_channel(&card->data);
5385         if (rc)
5386                 goto retriable;
5387 retriable:
5388         if (rc == -ERESTARTSYS) {
5389                 QETH_CARD_TEXT(card, 2, "break1");
5390                 return rc;
5391         } else if (rc) {
5392                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5393                 if (--retries < 0)
5394                         goto out;
5395                 else
5396                         goto retry;
5397         }
5398
5399         qeth_determine_capabilities(card);
5400         qeth_read_ccw_conf_data(card);
5401         qeth_idx_init(card);
5402
5403         rc = qeth_idx_activate_read_channel(card);
5404         if (rc == -EINTR) {
5405                 QETH_CARD_TEXT(card, 2, "break2");
5406                 return rc;
5407         } else if (rc) {
5408                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5409                 if (--retries < 0)
5410                         goto out;
5411                 else
5412                         goto retry;
5413         }
5414
5415         rc = qeth_idx_activate_write_channel(card);
5416         if (rc == -EINTR) {
5417                 QETH_CARD_TEXT(card, 2, "break3");
5418                 return rc;
5419         } else if (rc) {
5420                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5421                 if (--retries < 0)
5422                         goto out;
5423                 else
5424                         goto retry;
5425         }
5426         card->read_or_write_problem = 0;
5427         rc = qeth_mpc_initialize(card);
5428         if (rc) {
5429                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5430                 goto out;
5431         }
5432
5433         rc = qeth_send_startlan(card);
5434         if (rc) {
5435                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5436                 if (rc == -ENETDOWN) {
5437                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5438                         *carrier_ok = false;
5439                 } else {
5440                         goto out;
5441                 }
5442         } else {
5443                 *carrier_ok = true;
5444         }
5445
5446         card->options.ipa4.supported = 0;
5447         card->options.ipa6.supported = 0;
5448         card->options.adp.supported = 0;
5449         card->options.sbp.supported_funcs = 0;
5450         card->info.diagass_support = 0;
5451         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5452         if (rc == -ENOMEM)
5453                 goto out;
5454         if (qeth_is_supported(card, IPA_IPV6)) {
5455                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5456                 if (rc == -ENOMEM)
5457                         goto out;
5458         }
5459         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5460                 rc = qeth_query_setadapterparms(card);
5461                 if (rc < 0) {
5462                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5463                         goto out;
5464                 }
5465         }
5466         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5467                 rc = qeth_query_setdiagass(card);
5468                 if (rc)
5469                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5470         }
5471
5472         qeth_trace_features(card);
5473
5474         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5475             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5476                 card->info.hwtrap = 0;
5477
5478         if (card->options.isolation != ISOLATION_MODE_NONE) {
5479                 rc = qeth_setadpparms_set_access_ctrl(card,
5480                                                       card->options.isolation);
5481                 if (rc)
5482                         goto out;
5483         }
5484
5485         qeth_init_link_info(card);
5486
5487         rc = qeth_init_qdio_queues(card);
5488         if (rc) {
5489                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5490                 goto out;
5491         }
5492
5493         return 0;
5494 out:
5495         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5496                 "an error on the device\n");
5497         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5498                          CARD_DEVID(card), rc);
5499         return rc;
5500 }
5501
5502 static int qeth_set_online(struct qeth_card *card,
5503                            const struct qeth_discipline *disc)
5504 {
5505         bool carrier_ok;
5506         int rc;
5507
5508         mutex_lock(&card->conf_mutex);
5509         QETH_CARD_TEXT(card, 2, "setonlin");
5510
5511         rc = qeth_hardsetup_card(card, &carrier_ok);
5512         if (rc) {
5513                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5514                 rc = -ENODEV;
5515                 goto err_hardsetup;
5516         }
5517
5518         qeth_print_status_message(card);
5519
5520         if (card->dev->reg_state != NETREG_REGISTERED)
5521                 /* no need for locking / error handling at this early stage: */
5522                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5523
5524         rc = disc->set_online(card, carrier_ok);
5525         if (rc)
5526                 goto err_online;
5527
5528         /* let user_space know that device is online */
5529         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5530
5531         mutex_unlock(&card->conf_mutex);
5532         return 0;
5533
5534 err_online:
5535 err_hardsetup:
5536         qeth_qdio_clear_card(card, 0);
5537         qeth_clear_working_pool_list(card);
5538         qeth_flush_local_addrs(card);
5539
5540         qeth_stop_channel(&card->data);
5541         qeth_stop_channel(&card->write);
5542         qeth_stop_channel(&card->read);
5543         qdio_free(CARD_DDEV(card));
5544
5545         mutex_unlock(&card->conf_mutex);
5546         return rc;
5547 }
5548
5549 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5550                      bool resetting)
5551 {
5552         int rc, rc2, rc3;
5553
5554         mutex_lock(&card->conf_mutex);
5555         QETH_CARD_TEXT(card, 3, "setoffl");
5556
5557         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5558                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5559                 card->info.hwtrap = 1;
5560         }
5561
5562         /* cancel any stalled cmd that might block the rtnl: */
5563         qeth_clear_ipacmd_list(card);
5564
5565         rtnl_lock();
5566         card->info.open_when_online = card->dev->flags & IFF_UP;
5567         dev_close(card->dev);
5568         netif_device_detach(card->dev);
5569         netif_carrier_off(card->dev);
5570         rtnl_unlock();
5571
5572         cancel_work_sync(&card->rx_mode_work);
5573
5574         disc->set_offline(card);
5575
5576         qeth_qdio_clear_card(card, 0);
5577         qeth_drain_output_queues(card);
5578         qeth_clear_working_pool_list(card);
5579         qeth_flush_local_addrs(card);
5580         card->info.promisc_mode = 0;
5581
5582         rc  = qeth_stop_channel(&card->data);
5583         rc2 = qeth_stop_channel(&card->write);
5584         rc3 = qeth_stop_channel(&card->read);
5585         if (!rc)
5586                 rc = (rc2) ? rc2 : rc3;
5587         if (rc)
5588                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5589         qdio_free(CARD_DDEV(card));
5590
5591         /* let user_space know that device is offline */
5592         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5593
5594         mutex_unlock(&card->conf_mutex);
5595         return 0;
5596 }
5597 EXPORT_SYMBOL_GPL(qeth_set_offline);
5598
5599 static int qeth_do_reset(void *data)
5600 {
5601         const struct qeth_discipline *disc;
5602         struct qeth_card *card = data;
5603         int rc;
5604
5605         /* Lock-free, other users will block until we are done. */
5606         disc = card->discipline;
5607
5608         QETH_CARD_TEXT(card, 2, "recover1");
5609         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5610                 return 0;
5611         QETH_CARD_TEXT(card, 2, "recover2");
5612         dev_warn(&card->gdev->dev,
5613                  "A recovery process has been started for the device\n");
5614
5615         qeth_set_offline(card, disc, true);
5616         rc = qeth_set_online(card, disc);
5617         if (!rc) {
5618                 dev_info(&card->gdev->dev,
5619                          "Device successfully recovered!\n");
5620         } else {
5621                 ccwgroup_set_offline(card->gdev);
5622                 dev_warn(&card->gdev->dev,
5623                          "The qeth device driver failed to recover an error on the device\n");
5624         }
5625         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5626         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5627         return 0;
5628 }
5629
5630 #if IS_ENABLED(CONFIG_QETH_L3)
5631 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5632                                 struct qeth_hdr *hdr)
5633 {
5634         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5635         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5636         struct net_device *dev = skb->dev;
5637
5638         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5639                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5640                                 "FAKELL", skb->len);
5641                 return;
5642         }
5643
5644         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5645                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5646                                                              ETH_P_IP;
5647                 unsigned char tg_addr[ETH_ALEN];
5648
5649                 skb_reset_network_header(skb);
5650                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5651                 case QETH_CAST_MULTICAST:
5652                         if (prot == ETH_P_IP)
5653                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5654                         else
5655                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5656                         QETH_CARD_STAT_INC(card, rx_multicast);
5657                         break;
5658                 case QETH_CAST_BROADCAST:
5659                         ether_addr_copy(tg_addr, dev->broadcast);
5660                         QETH_CARD_STAT_INC(card, rx_multicast);
5661                         break;
5662                 default:
5663                         if (card->options.sniffer)
5664                                 skb->pkt_type = PACKET_OTHERHOST;
5665                         ether_addr_copy(tg_addr, dev->dev_addr);
5666                 }
5667
5668                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5669                         dev_hard_header(skb, dev, prot, tg_addr,
5670                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5671                 else
5672                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5673                                         skb->len);
5674         }
5675
5676         /* copy VLAN tag from hdr into skb */
5677         if (!card->options.sniffer &&
5678             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5679                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5680                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5681                                 l3_hdr->vlan_id :
5682                                 l3_hdr->next_hop.rx.vlan_id;
5683
5684                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5685         }
5686 }
5687 #endif
5688
5689 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5690                              struct qeth_hdr *hdr, bool uses_frags)
5691 {
5692         struct napi_struct *napi = &card->napi;
5693         bool is_cso;
5694
5695         switch (hdr->hdr.l2.id) {
5696         case QETH_HEADER_TYPE_OSN:
5697                 skb_push(skb, sizeof(*hdr));
5698                 skb_copy_to_linear_data(skb, hdr, sizeof(*hdr));
5699                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5700                 QETH_CARD_STAT_INC(card, rx_packets);
5701
5702                 card->osn_info.data_cb(skb);
5703                 return;
5704 #if IS_ENABLED(CONFIG_QETH_L3)
5705         case QETH_HEADER_TYPE_LAYER3:
5706                 qeth_l3_rebuild_skb(card, skb, hdr);
5707                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5708                 break;
5709 #endif
5710         case QETH_HEADER_TYPE_LAYER2:
5711                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5712                 break;
5713         default:
5714                 /* never happens */
5715                 if (uses_frags)
5716                         napi_free_frags(napi);
5717                 else
5718                         dev_kfree_skb_any(skb);
5719                 return;
5720         }
5721
5722         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5723                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5724                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5725         } else {
5726                 skb->ip_summed = CHECKSUM_NONE;
5727         }
5728
5729         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5730         QETH_CARD_STAT_INC(card, rx_packets);
5731         if (skb_is_nonlinear(skb)) {
5732                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5733                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5734                                    skb_shinfo(skb)->nr_frags);
5735         }
5736
5737         if (uses_frags) {
5738                 napi_gro_frags(napi);
5739         } else {
5740                 skb->protocol = eth_type_trans(skb, skb->dev);
5741                 napi_gro_receive(napi, skb);
5742         }
5743 }
5744
5745 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5746 {
5747         struct page *page = virt_to_page(data);
5748         unsigned int next_frag;
5749
5750         next_frag = skb_shinfo(skb)->nr_frags;
5751         get_page(page);
5752         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5753                         data_len);
5754 }
5755
5756 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5757 {
5758         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5759 }
5760
5761 static int qeth_extract_skb(struct qeth_card *card,
5762                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5763                             int *__offset)
5764 {
5765         struct qeth_priv *priv = netdev_priv(card->dev);
5766         struct qdio_buffer *buffer = qethbuffer->buffer;
5767         struct napi_struct *napi = &card->napi;
5768         struct qdio_buffer_element *element;
5769         unsigned int linear_len = 0;
5770         bool uses_frags = false;
5771         int offset = *__offset;
5772         bool use_rx_sg = false;
5773         unsigned int headroom;
5774         struct qeth_hdr *hdr;
5775         struct sk_buff *skb;
5776         int skb_len = 0;
5777
5778         element = &buffer->element[*element_no];
5779
5780 next_packet:
5781         /* qeth_hdr must not cross element boundaries */
5782         while (element->length < offset + sizeof(struct qeth_hdr)) {
5783                 if (qeth_is_last_sbale(element))
5784                         return -ENODATA;
5785                 element++;
5786                 offset = 0;
5787         }
5788
5789         hdr = phys_to_virt(element->addr) + offset;
5790         offset += sizeof(*hdr);
5791         skb = NULL;
5792
5793         switch (hdr->hdr.l2.id) {
5794         case QETH_HEADER_TYPE_LAYER2:
5795                 skb_len = hdr->hdr.l2.pkt_length;
5796                 linear_len = ETH_HLEN;
5797                 headroom = 0;
5798                 break;
5799         case QETH_HEADER_TYPE_LAYER3:
5800                 skb_len = hdr->hdr.l3.length;
5801                 if (!IS_LAYER3(card)) {
5802                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5803                         goto walk_packet;
5804                 }
5805
5806                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5807                         linear_len = ETH_HLEN;
5808                         headroom = 0;
5809                         break;
5810                 }
5811
5812                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5813                         linear_len = sizeof(struct ipv6hdr);
5814                 else
5815                         linear_len = sizeof(struct iphdr);
5816                 headroom = ETH_HLEN;
5817                 break;
5818         case QETH_HEADER_TYPE_OSN:
5819                 skb_len = hdr->hdr.osn.pdu_length;
5820                 if (!IS_OSN(card)) {
5821                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5822                         goto walk_packet;
5823                 }
5824
5825                 linear_len = skb_len;
5826                 headroom = sizeof(struct qeth_hdr);
5827                 break;
5828         default:
5829                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5830                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5831                 else
5832                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5833
5834                 /* Can't determine packet length, drop the whole buffer. */
5835                 return -EPROTONOSUPPORT;
5836         }
5837
5838         if (skb_len < linear_len) {
5839                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5840                 goto walk_packet;
5841         }
5842
5843         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5844                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5845                      !atomic_read(&card->force_alloc_skb) &&
5846                      !IS_OSN(card));
5847
5848         if (use_rx_sg) {
5849                 /* QETH_CQ_ENABLED only: */
5850                 if (qethbuffer->rx_skb &&
5851                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5852                         skb = qethbuffer->rx_skb;
5853                         qethbuffer->rx_skb = NULL;
5854                         goto use_skb;
5855                 }
5856
5857                 skb = napi_get_frags(napi);
5858                 if (!skb) {
5859                         /* -ENOMEM, no point in falling back further. */
5860                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5861                         goto walk_packet;
5862                 }
5863
5864                 if (skb_tailroom(skb) >= linear_len + headroom) {
5865                         uses_frags = true;
5866                         goto use_skb;
5867                 }
5868
5869                 netdev_info_once(card->dev,
5870                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5871                                  linear_len + headroom, skb_tailroom(skb));
5872                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5873         }
5874
5875         linear_len = skb_len;
5876         skb = napi_alloc_skb(napi, linear_len + headroom);
5877         if (!skb) {
5878                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5879                 goto walk_packet;
5880         }
5881
5882 use_skb:
5883         if (headroom)
5884                 skb_reserve(skb, headroom);
5885 walk_packet:
5886         while (skb_len) {
5887                 int data_len = min(skb_len, (int)(element->length - offset));
5888                 char *data = phys_to_virt(element->addr) + offset;
5889
5890                 skb_len -= data_len;
5891                 offset += data_len;
5892
5893                 /* Extract data from current element: */
5894                 if (skb && data_len) {
5895                         if (linear_len) {
5896                                 unsigned int copy_len;
5897
5898                                 copy_len = min_t(unsigned int, linear_len,
5899                                                  data_len);
5900
5901                                 skb_put_data(skb, data, copy_len);
5902                                 linear_len -= copy_len;
5903                                 data_len -= copy_len;
5904                                 data += copy_len;
5905                         }
5906
5907                         if (data_len)
5908                                 qeth_create_skb_frag(skb, data, data_len);
5909                 }
5910
5911                 /* Step forward to next element: */
5912                 if (skb_len) {
5913                         if (qeth_is_last_sbale(element)) {
5914                                 QETH_CARD_TEXT(card, 4, "unexeob");
5915                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5916                                 if (skb) {
5917                                         if (uses_frags)
5918                                                 napi_free_frags(napi);
5919                                         else
5920                                                 dev_kfree_skb_any(skb);
5921                                         QETH_CARD_STAT_INC(card,
5922                                                            rx_length_errors);
5923                                 }
5924                                 return -EMSGSIZE;
5925                         }
5926                         element++;
5927                         offset = 0;
5928                 }
5929         }
5930
5931         /* This packet was skipped, go get another one: */
5932         if (!skb)
5933                 goto next_packet;
5934
5935         *element_no = element - &buffer->element[0];
5936         *__offset = offset;
5937
5938         qeth_receive_skb(card, skb, hdr, uses_frags);
5939         return 0;
5940 }
5941
5942 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5943                                       struct qeth_qdio_buffer *buf, bool *done)
5944 {
5945         unsigned int work_done = 0;
5946
5947         while (budget) {
5948                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5949                                      &card->rx.e_offset)) {
5950                         *done = true;
5951                         break;
5952                 }
5953
5954                 work_done++;
5955                 budget--;
5956         }
5957
5958         return work_done;
5959 }
5960
5961 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5962 {
5963         struct qeth_rx *ctx = &card->rx;
5964         unsigned int work_done = 0;
5965
5966         while (budget > 0) {
5967                 struct qeth_qdio_buffer *buffer;
5968                 unsigned int skbs_done = 0;
5969                 bool done = false;
5970
5971                 /* Fetch completed RX buffers: */
5972                 if (!card->rx.b_count) {
5973                         card->rx.qdio_err = 0;
5974                         card->rx.b_count = qdio_get_next_buffers(
5975                                 card->data.ccwdev, 0, &card->rx.b_index,
5976                                 &card->rx.qdio_err);
5977                         if (card->rx.b_count <= 0) {
5978                                 card->rx.b_count = 0;
5979                                 break;
5980                         }
5981                 }
5982
5983                 /* Process one completed RX buffer: */
5984                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5985                 if (!(card->rx.qdio_err &&
5986                       qeth_check_qdio_errors(card, buffer->buffer,
5987                                              card->rx.qdio_err, "qinerr")))
5988                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5989                                                       &done);
5990                 else
5991                         done = true;
5992
5993                 work_done += skbs_done;
5994                 budget -= skbs_done;
5995
5996                 if (done) {
5997                         QETH_CARD_STAT_INC(card, rx_bufs);
5998                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5999                         buffer->pool_entry = NULL;
6000                         card->rx.b_count--;
6001                         ctx->bufs_refill++;
6002                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
6003                                                                  ctx->bufs_refill);
6004
6005                         /* Step forward to next buffer: */
6006                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
6007                         card->rx.buf_element = 0;
6008                         card->rx.e_offset = 0;
6009                 }
6010         }
6011
6012         return work_done;
6013 }
6014
6015 static void qeth_cq_poll(struct qeth_card *card)
6016 {
6017         unsigned int work_done = 0;
6018
6019         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
6020                 unsigned int start, error;
6021                 int completed;
6022
6023                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
6024                                                &error);
6025                 if (completed <= 0)
6026                         return;
6027
6028                 qeth_qdio_cq_handler(card, error, 1, start, completed);
6029                 work_done += completed;
6030         }
6031 }
6032
6033 int qeth_poll(struct napi_struct *napi, int budget)
6034 {
6035         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
6036         unsigned int work_done;
6037
6038         work_done = qeth_rx_poll(card, budget);
6039
6040         if (card->options.cq == QETH_CQ_ENABLED)
6041                 qeth_cq_poll(card);
6042
6043         if (budget) {
6044                 struct qeth_rx *ctx = &card->rx;
6045
6046                 /* Process any substantial refill backlog: */
6047                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
6048
6049                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
6050                 if (work_done >= budget)
6051                         return work_done;
6052         }
6053
6054         if (napi_complete_done(napi, work_done) &&
6055             qdio_start_irq(CARD_DDEV(card)))
6056                 napi_schedule(napi);
6057
6058         return work_done;
6059 }
6060 EXPORT_SYMBOL_GPL(qeth_poll);
6061
6062 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
6063                                  unsigned int bidx, unsigned int qdio_error,
6064                                  int budget)
6065 {
6066         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
6067         u8 sflags = buffer->buffer->element[15].sflags;
6068         struct qeth_card *card = queue->card;
6069         bool error = !!qdio_error;
6070
6071         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
6072                 WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
6073
6074                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
6075
6076                 switch (atomic_cmpxchg(&buffer->state,
6077                                        QETH_QDIO_BUF_PRIMED,
6078                                        QETH_QDIO_BUF_PENDING)) {
6079                 case QETH_QDIO_BUF_PRIMED:
6080                         /* We have initial ownership, no QAOB (yet): */
6081                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
6082
6083                         /* Handle race with qeth_qdio_handle_aob(): */
6084                         switch (atomic_xchg(&buffer->state,
6085                                             QETH_QDIO_BUF_NEED_QAOB)) {
6086                         case QETH_QDIO_BUF_PENDING:
6087                                 /* No concurrent QAOB notification. */
6088
6089                                 /* Prepare the queue slot for immediate re-use: */
6090                                 qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
6091                                 if (qeth_init_qdio_out_buf(queue, bidx)) {
6092                                         QETH_CARD_TEXT(card, 2, "outofbuf");
6093                                         qeth_schedule_recovery(card);
6094                                 }
6095
6096                                 list_add(&buffer->list_entry,
6097                                          &queue->pending_bufs);
6098                                 /* Skip clearing the buffer: */
6099                                 return;
6100                         case QETH_QDIO_BUF_QAOB_OK:
6101                                 qeth_notify_skbs(queue, buffer,
6102                                                  TX_NOTIFY_DELAYED_OK);
6103                                 error = false;
6104                                 break;
6105                         case QETH_QDIO_BUF_QAOB_ERROR:
6106                                 qeth_notify_skbs(queue, buffer,
6107                                                  TX_NOTIFY_DELAYED_GENERALERROR);
6108                                 error = true;
6109                                 break;
6110                         default:
6111                                 WARN_ON_ONCE(1);
6112                         }
6113
6114                         break;
6115                 case QETH_QDIO_BUF_QAOB_OK:
6116                         /* qeth_qdio_handle_aob() already received a QAOB: */
6117                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
6118                         error = false;
6119                         break;
6120                 case QETH_QDIO_BUF_QAOB_ERROR:
6121                         /* qeth_qdio_handle_aob() already received a QAOB: */
6122                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
6123                         error = true;
6124                         break;
6125                 default:
6126                         WARN_ON_ONCE(1);
6127                 }
6128         } else if (card->options.cq == QETH_CQ_ENABLED) {
6129                 qeth_notify_skbs(queue, buffer,
6130                                  qeth_compute_cq_notification(sflags, 0));
6131         }
6132
6133         qeth_clear_output_buffer(queue, buffer, error, budget);
6134 }
6135
6136 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6137 {
6138         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6139         unsigned int queue_no = queue->queue_no;
6140         struct qeth_card *card = queue->card;
6141         struct net_device *dev = card->dev;
6142         unsigned int work_done = 0;
6143         struct netdev_queue *txq;
6144
6145         txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6146
6147         while (1) {
6148                 unsigned int start, error, i;
6149                 unsigned int packets = 0;
6150                 unsigned int bytes = 0;
6151                 int completed;
6152
6153                 qeth_tx_complete_pending_bufs(card, queue, false);
6154
6155                 if (qeth_out_queue_is_empty(queue)) {
6156                         napi_complete(napi);
6157                         return 0;
6158                 }
6159
6160                 /* Give the CPU a breather: */
6161                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6162                         QETH_TXQ_STAT_INC(queue, completion_yield);
6163                         if (napi_complete_done(napi, 0))
6164                                 napi_schedule(napi);
6165                         return 0;
6166                 }
6167
6168                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6169                                                &start, &error);
6170                 if (completed <= 0) {
6171                         /* Ensure we see TX completion for pending work: */
6172                         if (napi_complete_done(napi, 0))
6173                                 qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
6174                         return 0;
6175                 }
6176
6177                 for (i = start; i < start + completed; i++) {
6178                         struct qeth_qdio_out_buffer *buffer;
6179                         unsigned int bidx = QDIO_BUFNR(i);
6180
6181                         buffer = queue->bufs[bidx];
6182                         packets += buffer->frames;
6183                         bytes += buffer->bytes;
6184
6185                         qeth_handle_send_error(card, buffer, error);
6186                         qeth_iqd_tx_complete(queue, bidx, error, budget);
6187                 }
6188
6189                 netdev_tx_completed_queue(txq, packets, bytes);
6190                 atomic_sub(completed, &queue->used_buffers);
6191                 work_done += completed;
6192
6193                 /* xmit may have observed the full-condition, but not yet
6194                  * stopped the txq. In which case the code below won't trigger.
6195                  * So before returning, xmit will re-check the txq's fill level
6196                  * and wake it up if needed.
6197                  */
6198                 if (netif_tx_queue_stopped(txq) &&
6199                     !qeth_out_queue_is_full(queue))
6200                         netif_tx_wake_queue(txq);
6201         }
6202 }
6203
6204 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6205 {
6206         if (!cmd->hdr.return_code)
6207                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6208         return cmd->hdr.return_code;
6209 }
6210
6211 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6212                                         struct qeth_reply *reply,
6213                                         unsigned long data)
6214 {
6215         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6216         struct qeth_ipa_caps *caps = reply->param;
6217
6218         if (qeth_setassparms_inspect_rc(cmd))
6219                 return -EIO;
6220
6221         caps->supported = cmd->data.setassparms.data.caps.supported;
6222         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6223         return 0;
6224 }
6225
6226 int qeth_setassparms_cb(struct qeth_card *card,
6227                         struct qeth_reply *reply, unsigned long data)
6228 {
6229         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6230
6231         QETH_CARD_TEXT(card, 4, "defadpcb");
6232
6233         if (cmd->hdr.return_code)
6234                 return -EIO;
6235
6236         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6237         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6238                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6239         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6240                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6241         return 0;
6242 }
6243 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6244
6245 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6246                                                  enum qeth_ipa_funcs ipa_func,
6247                                                  u16 cmd_code,
6248                                                  unsigned int data_length,
6249                                                  enum qeth_prot_versions prot)
6250 {
6251         struct qeth_ipacmd_setassparms *setassparms;
6252         struct qeth_ipacmd_setassparms_hdr *hdr;
6253         struct qeth_cmd_buffer *iob;
6254
6255         QETH_CARD_TEXT(card, 4, "getasscm");
6256         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6257                                  data_length +
6258                                  offsetof(struct qeth_ipacmd_setassparms,
6259                                           data));
6260         if (!iob)
6261                 return NULL;
6262
6263         setassparms = &__ipa_cmd(iob)->data.setassparms;
6264         setassparms->assist_no = ipa_func;
6265
6266         hdr = &setassparms->hdr;
6267         hdr->length = sizeof(*hdr) + data_length;
6268         hdr->command_code = cmd_code;
6269         return iob;
6270 }
6271 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6272
6273 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6274                                       enum qeth_ipa_funcs ipa_func,
6275                                       u16 cmd_code, u32 *data,
6276                                       enum qeth_prot_versions prot)
6277 {
6278         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6279         struct qeth_cmd_buffer *iob;
6280
6281         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6282         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6283         if (!iob)
6284                 return -ENOMEM;
6285
6286         if (data)
6287                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6288         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6289 }
6290 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6291
6292 static void qeth_unregister_dbf_views(void)
6293 {
6294         int x;
6295
6296         for (x = 0; x < QETH_DBF_INFOS; x++) {
6297                 debug_unregister(qeth_dbf[x].id);
6298                 qeth_dbf[x].id = NULL;
6299         }
6300 }
6301
6302 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6303 {
6304         char dbf_txt_buf[32];
6305         va_list args;
6306
6307         if (!debug_level_enabled(id, level))
6308                 return;
6309         va_start(args, fmt);
6310         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6311         va_end(args);
6312         debug_text_event(id, level, dbf_txt_buf);
6313 }
6314 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6315
6316 static int qeth_register_dbf_views(void)
6317 {
6318         int ret;
6319         int x;
6320
6321         for (x = 0; x < QETH_DBF_INFOS; x++) {
6322                 /* register the areas */
6323                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6324                                                 qeth_dbf[x].pages,
6325                                                 qeth_dbf[x].areas,
6326                                                 qeth_dbf[x].len);
6327                 if (qeth_dbf[x].id == NULL) {
6328                         qeth_unregister_dbf_views();
6329                         return -ENOMEM;
6330                 }
6331
6332                 /* register a view */
6333                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6334                 if (ret) {
6335                         qeth_unregister_dbf_views();
6336                         return ret;
6337                 }
6338
6339                 /* set a passing level */
6340                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6341         }
6342
6343         return 0;
6344 }
6345
6346 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6347
6348 int qeth_setup_discipline(struct qeth_card *card,
6349                           enum qeth_discipline_id discipline)
6350 {
6351         int rc;
6352
6353         mutex_lock(&qeth_mod_mutex);
6354         switch (discipline) {
6355         case QETH_DISCIPLINE_LAYER3:
6356                 card->discipline = try_then_request_module(
6357                         symbol_get(qeth_l3_discipline), "qeth_l3");
6358                 break;
6359         case QETH_DISCIPLINE_LAYER2:
6360                 card->discipline = try_then_request_module(
6361                         symbol_get(qeth_l2_discipline), "qeth_l2");
6362                 break;
6363         default:
6364                 break;
6365         }
6366         mutex_unlock(&qeth_mod_mutex);
6367
6368         if (!card->discipline) {
6369                 dev_err(&card->gdev->dev, "There is no kernel module to "
6370                         "support discipline %d\n", discipline);
6371                 return -EINVAL;
6372         }
6373
6374         rc = card->discipline->setup(card->gdev);
6375         if (rc) {
6376                 if (discipline == QETH_DISCIPLINE_LAYER2)
6377                         symbol_put(qeth_l2_discipline);
6378                 else
6379                         symbol_put(qeth_l3_discipline);
6380                 card->discipline = NULL;
6381
6382                 return rc;
6383         }
6384
6385         card->options.layer = discipline;
6386         return 0;
6387 }
6388
6389 void qeth_remove_discipline(struct qeth_card *card)
6390 {
6391         card->discipline->remove(card->gdev);
6392
6393         if (IS_LAYER2(card))
6394                 symbol_put(qeth_l2_discipline);
6395         else
6396                 symbol_put(qeth_l3_discipline);
6397         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6398         card->discipline = NULL;
6399 }
6400
6401 const struct device_type qeth_generic_devtype = {
6402         .name = "qeth_generic",
6403 };
6404 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
6405
6406 static const struct device_type qeth_osn_devtype = {
6407         .name = "qeth_osn",
6408 };
6409
6410 #define DBF_NAME_LEN    20
6411
6412 struct qeth_dbf_entry {
6413         char dbf_name[DBF_NAME_LEN];
6414         debug_info_t *dbf_info;
6415         struct list_head dbf_list;
6416 };
6417
6418 static LIST_HEAD(qeth_dbf_list);
6419 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6420
6421 static debug_info_t *qeth_get_dbf_entry(char *name)
6422 {
6423         struct qeth_dbf_entry *entry;
6424         debug_info_t *rc = NULL;
6425
6426         mutex_lock(&qeth_dbf_list_mutex);
6427         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6428                 if (strcmp(entry->dbf_name, name) == 0) {
6429                         rc = entry->dbf_info;
6430                         break;
6431                 }
6432         }
6433         mutex_unlock(&qeth_dbf_list_mutex);
6434         return rc;
6435 }
6436
6437 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6438 {
6439         struct qeth_dbf_entry *new_entry;
6440
6441         card->debug = debug_register(name, 2, 1, 8);
6442         if (!card->debug) {
6443                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6444                 goto err;
6445         }
6446         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6447                 goto err_dbg;
6448         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6449         if (!new_entry)
6450                 goto err_dbg;
6451         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6452         new_entry->dbf_info = card->debug;
6453         mutex_lock(&qeth_dbf_list_mutex);
6454         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6455         mutex_unlock(&qeth_dbf_list_mutex);
6456
6457         return 0;
6458
6459 err_dbg:
6460         debug_unregister(card->debug);
6461 err:
6462         return -ENOMEM;
6463 }
6464
6465 static void qeth_clear_dbf_list(void)
6466 {
6467         struct qeth_dbf_entry *entry, *tmp;
6468
6469         mutex_lock(&qeth_dbf_list_mutex);
6470         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6471                 list_del(&entry->dbf_list);
6472                 debug_unregister(entry->dbf_info);
6473                 kfree(entry);
6474         }
6475         mutex_unlock(&qeth_dbf_list_mutex);
6476 }
6477
6478 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6479 {
6480         struct net_device *dev;
6481         struct qeth_priv *priv;
6482
6483         switch (card->info.type) {
6484         case QETH_CARD_TYPE_IQD:
6485                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6486                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6487                 break;
6488         case QETH_CARD_TYPE_OSM:
6489                 dev = alloc_etherdev(sizeof(*priv));
6490                 break;
6491         case QETH_CARD_TYPE_OSN:
6492                 dev = alloc_netdev(sizeof(*priv), "osn%d", NET_NAME_UNKNOWN,
6493                                    ether_setup);
6494                 break;
6495         default:
6496                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6497         }
6498
6499         if (!dev)
6500                 return NULL;
6501
6502         priv = netdev_priv(dev);
6503         priv->rx_copybreak = QETH_RX_COPYBREAK;
6504         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6505
6506         dev->ml_priv = card;
6507         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6508         dev->min_mtu = IS_OSN(card) ? 64 : 576;
6509          /* initialized when device first goes online: */
6510         dev->max_mtu = 0;
6511         dev->mtu = 0;
6512         SET_NETDEV_DEV(dev, &card->gdev->dev);
6513         netif_carrier_off(dev);
6514
6515         if (IS_OSN(card)) {
6516                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
6517         } else {
6518                 dev->ethtool_ops = &qeth_ethtool_ops;
6519                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6520                 dev->hw_features |= NETIF_F_SG;
6521                 dev->vlan_features |= NETIF_F_SG;
6522                 if (IS_IQD(card))
6523                         dev->features |= NETIF_F_SG;
6524         }
6525
6526         return dev;
6527 }
6528
6529 struct net_device *qeth_clone_netdev(struct net_device *orig)
6530 {
6531         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6532
6533         if (!clone)
6534                 return NULL;
6535
6536         clone->dev_port = orig->dev_port;
6537         return clone;
6538 }
6539
6540 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6541 {
6542         struct qeth_card *card;
6543         struct device *dev;
6544         int rc;
6545         enum qeth_discipline_id enforced_disc;
6546         char dbf_name[DBF_NAME_LEN];
6547
6548         QETH_DBF_TEXT(SETUP, 2, "probedev");
6549
6550         dev = &gdev->dev;
6551         if (!get_device(dev))
6552                 return -ENODEV;
6553
6554         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6555
6556         card = qeth_alloc_card(gdev);
6557         if (!card) {
6558                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6559                 rc = -ENOMEM;
6560                 goto err_dev;
6561         }
6562
6563         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6564                 dev_name(&gdev->dev));
6565         card->debug = qeth_get_dbf_entry(dbf_name);
6566         if (!card->debug) {
6567                 rc = qeth_add_dbf_entry(card, dbf_name);
6568                 if (rc)
6569                         goto err_card;
6570         }
6571
6572         qeth_setup_card(card);
6573         card->dev = qeth_alloc_netdev(card);
6574         if (!card->dev) {
6575                 rc = -ENOMEM;
6576                 goto err_card;
6577         }
6578
6579         qeth_determine_capabilities(card);
6580         qeth_set_blkt_defaults(card);
6581
6582         card->qdio.no_out_queues = card->dev->num_tx_queues;
6583         rc = qeth_update_from_chp_desc(card);
6584         if (rc)
6585                 goto err_chp_desc;
6586
6587         if (IS_OSN(card))
6588                 gdev->dev.groups = qeth_osn_dev_groups;
6589         else
6590                 gdev->dev.groups = qeth_dev_groups;
6591
6592         enforced_disc = qeth_enforce_discipline(card);
6593         switch (enforced_disc) {
6594         case QETH_DISCIPLINE_UNDETERMINED:
6595                 gdev->dev.type = &qeth_generic_devtype;
6596                 break;
6597         default:
6598                 card->info.layer_enforced = true;
6599                 /* It's so early that we don't need the discipline_mutex yet. */
6600                 rc = qeth_setup_discipline(card, enforced_disc);
6601                 if (rc)
6602                         goto err_setup_disc;
6603
6604                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
6605                                                 card->discipline->devtype;
6606                 break;
6607         }
6608
6609         return 0;
6610
6611 err_setup_disc:
6612 err_chp_desc:
6613         free_netdev(card->dev);
6614 err_card:
6615         qeth_core_free_card(card);
6616 err_dev:
6617         put_device(dev);
6618         return rc;
6619 }
6620
6621 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6622 {
6623         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6624
6625         QETH_CARD_TEXT(card, 2, "removedv");
6626
6627         mutex_lock(&card->discipline_mutex);
6628         if (card->discipline)
6629                 qeth_remove_discipline(card);
6630         mutex_unlock(&card->discipline_mutex);
6631
6632         qeth_free_qdio_queues(card);
6633
6634         free_netdev(card->dev);
6635         qeth_core_free_card(card);
6636         put_device(&gdev->dev);
6637 }
6638
6639 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6640 {
6641         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6642         int rc = 0;
6643         enum qeth_discipline_id def_discipline;
6644
6645         mutex_lock(&card->discipline_mutex);
6646         if (!card->discipline) {
6647                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6648                                                 QETH_DISCIPLINE_LAYER2;
6649                 rc = qeth_setup_discipline(card, def_discipline);
6650                 if (rc)
6651                         goto err;
6652         }
6653
6654         rc = qeth_set_online(card, card->discipline);
6655
6656 err:
6657         mutex_unlock(&card->discipline_mutex);
6658         return rc;
6659 }
6660
6661 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6662 {
6663         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6664         int rc;
6665
6666         mutex_lock(&card->discipline_mutex);
6667         rc = qeth_set_offline(card, card->discipline, false);
6668         mutex_unlock(&card->discipline_mutex);
6669
6670         return rc;
6671 }
6672
6673 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6674 {
6675         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6676
6677         qeth_set_allowed_threads(card, 0, 1);
6678         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6679                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6680         qeth_qdio_clear_card(card, 0);
6681         qeth_drain_output_queues(card);
6682         qdio_free(CARD_DDEV(card));
6683 }
6684
6685 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6686                            size_t count)
6687 {
6688         int err;
6689
6690         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6691                                   buf);
6692
6693         return err ? err : count;
6694 }
6695 static DRIVER_ATTR_WO(group);
6696
6697 static struct attribute *qeth_drv_attrs[] = {
6698         &driver_attr_group.attr,
6699         NULL,
6700 };
6701 static struct attribute_group qeth_drv_attr_group = {
6702         .attrs = qeth_drv_attrs,
6703 };
6704 static const struct attribute_group *qeth_drv_attr_groups[] = {
6705         &qeth_drv_attr_group,
6706         NULL,
6707 };
6708
6709 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6710         .driver = {
6711                 .groups = qeth_drv_attr_groups,
6712                 .owner = THIS_MODULE,
6713                 .name = "qeth",
6714         },
6715         .ccw_driver = &qeth_ccw_driver,
6716         .setup = qeth_core_probe_device,
6717         .remove = qeth_core_remove_device,
6718         .set_online = qeth_core_set_online,
6719         .set_offline = qeth_core_set_offline,
6720         .shutdown = qeth_core_shutdown,
6721 };
6722
6723 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
6724 {
6725         struct ccwgroup_device *gdev;
6726         struct qeth_card *card;
6727
6728         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
6729         if (!gdev)
6730                 return NULL;
6731
6732         card = dev_get_drvdata(&gdev->dev);
6733         put_device(&gdev->dev);
6734         return card;
6735 }
6736 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
6737
6738 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6739 {
6740         struct qeth_card *card = dev->ml_priv;
6741         struct mii_ioctl_data *mii_data;
6742         int rc = 0;
6743
6744         switch (cmd) {
6745         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6746                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
6747                 break;
6748         case SIOC_QETH_GET_CARD_TYPE:
6749                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6750                     !IS_VM_NIC(card))
6751                         return 1;
6752                 return 0;
6753         case SIOCGMIIPHY:
6754                 mii_data = if_mii(rq);
6755                 mii_data->phy_id = 0;
6756                 break;
6757         case SIOCGMIIREG:
6758                 mii_data = if_mii(rq);
6759                 if (mii_data->phy_id != 0)
6760                         rc = -EINVAL;
6761                 else
6762                         mii_data->val_out = qeth_mdio_read(dev,
6763                                 mii_data->phy_id, mii_data->reg_num);
6764                 break;
6765         case SIOC_QETH_QUERY_OAT:
6766                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
6767                 break;
6768         default:
6769                 if (card->discipline->do_ioctl)
6770                         rc = card->discipline->do_ioctl(dev, rq, cmd);
6771                 else
6772                         rc = -EOPNOTSUPP;
6773         }
6774         if (rc)
6775                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6776         return rc;
6777 }
6778 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6779
6780 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6781                               unsigned long data)
6782 {
6783         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6784         u32 *features = reply->param;
6785
6786         if (qeth_setassparms_inspect_rc(cmd))
6787                 return -EIO;
6788
6789         *features = cmd->data.setassparms.data.flags_32bit;
6790         return 0;
6791 }
6792
6793 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6794                              enum qeth_prot_versions prot)
6795 {
6796         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6797                                                  NULL, prot);
6798 }
6799
6800 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6801                             enum qeth_prot_versions prot, u8 *lp2lp)
6802 {
6803         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6804         struct qeth_cmd_buffer *iob;
6805         struct qeth_ipa_caps caps;
6806         u32 features;
6807         int rc;
6808
6809         /* some L3 HW requires combined L3+L4 csum offload: */
6810         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6811             cstype == IPA_OUTBOUND_CHECKSUM)
6812                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6813
6814         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6815                                        prot);
6816         if (!iob)
6817                 return -ENOMEM;
6818
6819         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6820         if (rc)
6821                 return rc;
6822
6823         if ((required_features & features) != required_features) {
6824                 qeth_set_csum_off(card, cstype, prot);
6825                 return -EOPNOTSUPP;
6826         }
6827
6828         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6829                                        SETASS_DATA_SIZEOF(flags_32bit),
6830                                        prot);
6831         if (!iob) {
6832                 qeth_set_csum_off(card, cstype, prot);
6833                 return -ENOMEM;
6834         }
6835
6836         if (features & QETH_IPA_CHECKSUM_LP2LP)
6837                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6838         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6839         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6840         if (rc) {
6841                 qeth_set_csum_off(card, cstype, prot);
6842                 return rc;
6843         }
6844
6845         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6846             !qeth_ipa_caps_enabled(&caps, required_features)) {
6847                 qeth_set_csum_off(card, cstype, prot);
6848                 return -EOPNOTSUPP;
6849         }
6850
6851         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6852                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6853
6854         if (lp2lp)
6855                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6856
6857         return 0;
6858 }
6859
6860 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6861                              enum qeth_prot_versions prot, u8 *lp2lp)
6862 {
6863         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6864                     qeth_set_csum_off(card, cstype, prot);
6865 }
6866
6867 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6868                              unsigned long data)
6869 {
6870         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6871         struct qeth_tso_start_data *tso_data = reply->param;
6872
6873         if (qeth_setassparms_inspect_rc(cmd))
6874                 return -EIO;
6875
6876         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6877         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6878         return 0;
6879 }
6880
6881 static int qeth_set_tso_off(struct qeth_card *card,
6882                             enum qeth_prot_versions prot)
6883 {
6884         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6885                                                  IPA_CMD_ASS_STOP, NULL, prot);
6886 }
6887
6888 static int qeth_set_tso_on(struct qeth_card *card,
6889                            enum qeth_prot_versions prot)
6890 {
6891         struct qeth_tso_start_data tso_data;
6892         struct qeth_cmd_buffer *iob;
6893         struct qeth_ipa_caps caps;
6894         int rc;
6895
6896         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6897                                        IPA_CMD_ASS_START, 0, prot);
6898         if (!iob)
6899                 return -ENOMEM;
6900
6901         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6902         if (rc)
6903                 return rc;
6904
6905         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6906                 qeth_set_tso_off(card, prot);
6907                 return -EOPNOTSUPP;
6908         }
6909
6910         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6911                                        IPA_CMD_ASS_ENABLE,
6912                                        SETASS_DATA_SIZEOF(caps), prot);
6913         if (!iob) {
6914                 qeth_set_tso_off(card, prot);
6915                 return -ENOMEM;
6916         }
6917
6918         /* enable TSO capability */
6919         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6920                 QETH_IPA_LARGE_SEND_TCP;
6921         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6922         if (rc) {
6923                 qeth_set_tso_off(card, prot);
6924                 return rc;
6925         }
6926
6927         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6928             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6929                 qeth_set_tso_off(card, prot);
6930                 return -EOPNOTSUPP;
6931         }
6932
6933         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6934                  tso_data.mss);
6935         return 0;
6936 }
6937
6938 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6939                             enum qeth_prot_versions prot)
6940 {
6941         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6942 }
6943
6944 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6945 {
6946         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6947         int rc_ipv6;
6948
6949         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6950                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6951                                             QETH_PROT_IPV4, NULL);
6952         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6953                 /* no/one Offload Assist available, so the rc is trivial */
6954                 return rc_ipv4;
6955
6956         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6957                                     QETH_PROT_IPV6, NULL);
6958
6959         if (on)
6960                 /* enable: success if any Assist is active */
6961                 return (rc_ipv6) ? rc_ipv4 : 0;
6962
6963         /* disable: failure if any Assist is still active */
6964         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6965 }
6966
6967 /**
6968  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6969  * @dev:        a net_device
6970  */
6971 void qeth_enable_hw_features(struct net_device *dev)
6972 {
6973         struct qeth_card *card = dev->ml_priv;
6974         netdev_features_t features;
6975
6976         features = dev->features;
6977         /* force-off any feature that might need an IPA sequence.
6978          * netdev_update_features() will restart them.
6979          */
6980         dev->features &= ~dev->hw_features;
6981         /* toggle VLAN filter, so that VIDs are re-programmed: */
6982         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6983                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6984                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6985         }
6986         netdev_update_features(dev);
6987         if (features != dev->features)
6988                 dev_warn(&card->gdev->dev,
6989                          "Device recovery failed to restore all offload features\n");
6990 }
6991 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6992
6993 static void qeth_check_restricted_features(struct qeth_card *card,
6994                                            netdev_features_t changed,
6995                                            netdev_features_t actual)
6996 {
6997         netdev_features_t ipv6_features = NETIF_F_TSO6;
6998         netdev_features_t ipv4_features = NETIF_F_TSO;
6999
7000         if (!card->info.has_lp2lp_cso_v6)
7001                 ipv6_features |= NETIF_F_IPV6_CSUM;
7002         if (!card->info.has_lp2lp_cso_v4)
7003                 ipv4_features |= NETIF_F_IP_CSUM;
7004
7005         if ((changed & ipv6_features) && !(actual & ipv6_features))
7006                 qeth_flush_local_addrs6(card);
7007         if ((changed & ipv4_features) && !(actual & ipv4_features))
7008                 qeth_flush_local_addrs4(card);
7009 }
7010
7011 int qeth_set_features(struct net_device *dev, netdev_features_t features)
7012 {
7013         struct qeth_card *card = dev->ml_priv;
7014         netdev_features_t changed = dev->features ^ features;
7015         int rc = 0;
7016
7017         QETH_CARD_TEXT(card, 2, "setfeat");
7018         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7019
7020         if ((changed & NETIF_F_IP_CSUM)) {
7021                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
7022                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
7023                                        &card->info.has_lp2lp_cso_v4);
7024                 if (rc)
7025                         changed ^= NETIF_F_IP_CSUM;
7026         }
7027         if (changed & NETIF_F_IPV6_CSUM) {
7028                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
7029                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
7030                                        &card->info.has_lp2lp_cso_v6);
7031                 if (rc)
7032                         changed ^= NETIF_F_IPV6_CSUM;
7033         }
7034         if (changed & NETIF_F_RXCSUM) {
7035                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
7036                 if (rc)
7037                         changed ^= NETIF_F_RXCSUM;
7038         }
7039         if (changed & NETIF_F_TSO) {
7040                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
7041                                       QETH_PROT_IPV4);
7042                 if (rc)
7043                         changed ^= NETIF_F_TSO;
7044         }
7045         if (changed & NETIF_F_TSO6) {
7046                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
7047                                       QETH_PROT_IPV6);
7048                 if (rc)
7049                         changed ^= NETIF_F_TSO6;
7050         }
7051
7052         qeth_check_restricted_features(card, dev->features ^ features,
7053                                        dev->features ^ changed);
7054
7055         /* everything changed successfully? */
7056         if ((dev->features ^ features) == changed)
7057                 return 0;
7058         /* something went wrong. save changed features and return error */
7059         dev->features ^= changed;
7060         return -EIO;
7061 }
7062 EXPORT_SYMBOL_GPL(qeth_set_features);
7063
7064 netdev_features_t qeth_fix_features(struct net_device *dev,
7065                                     netdev_features_t features)
7066 {
7067         struct qeth_card *card = dev->ml_priv;
7068
7069         QETH_CARD_TEXT(card, 2, "fixfeat");
7070         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
7071                 features &= ~NETIF_F_IP_CSUM;
7072         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
7073                 features &= ~NETIF_F_IPV6_CSUM;
7074         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
7075             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
7076                 features &= ~NETIF_F_RXCSUM;
7077         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
7078                 features &= ~NETIF_F_TSO;
7079         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
7080                 features &= ~NETIF_F_TSO6;
7081
7082         QETH_CARD_HEX(card, 2, &features, sizeof(features));
7083         return features;
7084 }
7085 EXPORT_SYMBOL_GPL(qeth_fix_features);
7086
7087 netdev_features_t qeth_features_check(struct sk_buff *skb,
7088                                       struct net_device *dev,
7089                                       netdev_features_t features)
7090 {
7091         struct qeth_card *card = dev->ml_priv;
7092
7093         /* Traffic with local next-hop is not eligible for some offloads: */
7094         if (skb->ip_summed == CHECKSUM_PARTIAL &&
7095             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
7096                 netdev_features_t restricted = 0;
7097
7098                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
7099                         restricted |= NETIF_F_ALL_TSO;
7100
7101                 switch (vlan_get_protocol(skb)) {
7102                 case htons(ETH_P_IP):
7103                         if (!card->info.has_lp2lp_cso_v4)
7104                                 restricted |= NETIF_F_IP_CSUM;
7105
7106                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
7107                                 features &= ~restricted;
7108                         break;
7109                 case htons(ETH_P_IPV6):
7110                         if (!card->info.has_lp2lp_cso_v6)
7111                                 restricted |= NETIF_F_IPV6_CSUM;
7112
7113                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
7114                                 features &= ~restricted;
7115                         break;
7116                 default:
7117                         break;
7118                 }
7119         }
7120
7121         /* GSO segmentation builds skbs with
7122          *      a (small) linear part for the headers, and
7123          *      page frags for the data.
7124          * Compared to a linear skb, the header-only part consumes an
7125          * additional buffer element. This reduces buffer utilization, and
7126          * hurts throughput. So compress small segments into one element.
7127          */
7128         if (netif_needs_gso(skb, features)) {
7129                 /* match skb_segment(): */
7130                 unsigned int doffset = skb->data - skb_mac_header(skb);
7131                 unsigned int hsize = skb_shinfo(skb)->gso_size;
7132                 unsigned int hroom = skb_headroom(skb);
7133
7134                 /* linearize only if resulting skb allocations are order-0: */
7135                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
7136                         features &= ~NETIF_F_SG;
7137         }
7138
7139         return vlan_features_check(skb, features);
7140 }
7141 EXPORT_SYMBOL_GPL(qeth_features_check);
7142
7143 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7144 {
7145         struct qeth_card *card = dev->ml_priv;
7146         struct qeth_qdio_out_q *queue;
7147         unsigned int i;
7148
7149         QETH_CARD_TEXT(card, 5, "getstat");
7150
7151         stats->rx_packets = card->stats.rx_packets;
7152         stats->rx_bytes = card->stats.rx_bytes;
7153         stats->rx_errors = card->stats.rx_length_errors +
7154                            card->stats.rx_frame_errors +
7155                            card->stats.rx_fifo_errors;
7156         stats->rx_dropped = card->stats.rx_dropped_nomem +
7157                             card->stats.rx_dropped_notsupp +
7158                             card->stats.rx_dropped_runt;
7159         stats->multicast = card->stats.rx_multicast;
7160         stats->rx_length_errors = card->stats.rx_length_errors;
7161         stats->rx_frame_errors = card->stats.rx_frame_errors;
7162         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7163
7164         for (i = 0; i < card->qdio.no_out_queues; i++) {
7165                 queue = card->qdio.out_qs[i];
7166
7167                 stats->tx_packets += queue->stats.tx_packets;
7168                 stats->tx_bytes += queue->stats.tx_bytes;
7169                 stats->tx_errors += queue->stats.tx_errors;
7170                 stats->tx_dropped += queue->stats.tx_dropped;
7171         }
7172 }
7173 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7174
7175 #define TC_IQD_UCAST   0
7176 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7177                                      unsigned int ucast_txqs)
7178 {
7179         unsigned int prio;
7180
7181         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7182          * qeth_iqd_select_queue() deals with this.
7183          * For unicast traffic, we defer the queue selection to the stack.
7184          * By installing a trivial prio map that spans over only the unicast
7185          * queues, we can encourage the stack to spread the ucast traffic evenly
7186          * without selecting the mcast queue.
7187          */
7188
7189         /* One traffic class, spanning over all active ucast queues: */
7190         netdev_set_num_tc(dev, 1);
7191         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7192                             QETH_IQD_MIN_UCAST_TXQ);
7193
7194         /* Map all priorities to this traffic class: */
7195         for (prio = 0; prio <= TC_BITMASK; prio++)
7196                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7197 }
7198
7199 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7200 {
7201         struct net_device *dev = card->dev;
7202         int rc;
7203
7204         /* Per netif_setup_tc(), adjust the mapping first: */
7205         if (IS_IQD(card))
7206                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7207
7208         rc = netif_set_real_num_tx_queues(dev, count);
7209
7210         if (rc && IS_IQD(card))
7211                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7212
7213         return rc;
7214 }
7215 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7216
7217 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7218                           u8 cast_type, struct net_device *sb_dev)
7219 {
7220         u16 txq;
7221
7222         if (cast_type != RTN_UNICAST)
7223                 return QETH_IQD_MCAST_TXQ;
7224         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7225                 return QETH_IQD_MIN_UCAST_TXQ;
7226
7227         txq = netdev_pick_tx(dev, skb, sb_dev);
7228         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7229 }
7230 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7231
7232 int qeth_open(struct net_device *dev)
7233 {
7234         struct qeth_card *card = dev->ml_priv;
7235
7236         QETH_CARD_TEXT(card, 4, "qethopen");
7237
7238         card->data.state = CH_STATE_UP;
7239         netif_tx_start_all_queues(dev);
7240
7241         local_bh_disable();
7242         if (IS_IQD(card)) {
7243                 struct qeth_qdio_out_q *queue;
7244                 unsigned int i;
7245
7246                 qeth_for_each_output_queue(card, queue, i) {
7247                         netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7248                                           QETH_NAPI_WEIGHT);
7249                         napi_enable(&queue->napi);
7250                         napi_schedule(&queue->napi);
7251                 }
7252         }
7253
7254         napi_enable(&card->napi);
7255         napi_schedule(&card->napi);
7256         /* kick-start the NAPI softirq: */
7257         local_bh_enable();
7258
7259         return 0;
7260 }
7261 EXPORT_SYMBOL_GPL(qeth_open);
7262
7263 int qeth_stop(struct net_device *dev)
7264 {
7265         struct qeth_card *card = dev->ml_priv;
7266
7267         QETH_CARD_TEXT(card, 4, "qethstop");
7268
7269         napi_disable(&card->napi);
7270         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7271         qdio_stop_irq(CARD_DDEV(card));
7272
7273         if (IS_IQD(card)) {
7274                 struct qeth_qdio_out_q *queue;
7275                 unsigned int i;
7276
7277                 /* Quiesce the NAPI instances: */
7278                 qeth_for_each_output_queue(card, queue, i)
7279                         napi_disable(&queue->napi);
7280
7281                 /* Stop .ndo_start_xmit, might still access queue->napi. */
7282                 netif_tx_disable(dev);
7283
7284                 qeth_for_each_output_queue(card, queue, i) {
7285                         del_timer_sync(&queue->timer);
7286                         /* Queues may get re-allocated, so remove the NAPIs. */
7287                         netif_napi_del(&queue->napi);
7288                 }
7289         } else {
7290                 netif_tx_disable(dev);
7291         }
7292
7293         return 0;
7294 }
7295 EXPORT_SYMBOL_GPL(qeth_stop);
7296
7297 static int __init qeth_core_init(void)
7298 {
7299         int rc;
7300
7301         pr_info("loading core functions\n");
7302
7303         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7304
7305         rc = qeth_register_dbf_views();
7306         if (rc)
7307                 goto dbf_err;
7308         qeth_core_root_dev = root_device_register("qeth");
7309         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7310         if (rc)
7311                 goto register_err;
7312         qeth_core_header_cache =
7313                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7314                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7315                                   0, NULL);
7316         if (!qeth_core_header_cache) {
7317                 rc = -ENOMEM;
7318                 goto slab_err;
7319         }
7320         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7321                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7322         if (!qeth_qdio_outbuf_cache) {
7323                 rc = -ENOMEM;
7324                 goto cqslab_err;
7325         }
7326         rc = ccw_driver_register(&qeth_ccw_driver);
7327         if (rc)
7328                 goto ccw_err;
7329         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7330         if (rc)
7331                 goto ccwgroup_err;
7332
7333         return 0;
7334
7335 ccwgroup_err:
7336         ccw_driver_unregister(&qeth_ccw_driver);
7337 ccw_err:
7338         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7339 cqslab_err:
7340         kmem_cache_destroy(qeth_core_header_cache);
7341 slab_err:
7342         root_device_unregister(qeth_core_root_dev);
7343 register_err:
7344         qeth_unregister_dbf_views();
7345 dbf_err:
7346         debugfs_remove_recursive(qeth_debugfs_root);
7347         pr_err("Initializing the qeth device driver failed\n");
7348         return rc;
7349 }
7350
7351 static void __exit qeth_core_exit(void)
7352 {
7353         qeth_clear_dbf_list();
7354         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7355         ccw_driver_unregister(&qeth_ccw_driver);
7356         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7357         kmem_cache_destroy(qeth_core_header_cache);
7358         root_device_unregister(qeth_core_root_dev);
7359         qeth_unregister_dbf_views();
7360         debugfs_remove_recursive(qeth_debugfs_root);
7361         pr_info("core functions removed\n");
7362 }
7363
7364 module_init(qeth_core_init);
7365 module_exit(qeth_core_exit);
7366 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7367 MODULE_DESCRIPTION("qeth core functions");
7368 MODULE_LICENSE("GPL");