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 static struct kmem_cache *qeth_core_header_cache;
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62 static struct kmem_cache *qeth_qaob_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
  74 static const char *qeth_get_cardname(struct qeth_card *card)
  75 {
  76         if (IS_VM_NIC(card)) {
  77                 switch (card->info.type) {
  78                 case QETH_CARD_TYPE_OSD:
  79                         return " Virtual NIC QDIO";
  80                 case QETH_CARD_TYPE_IQD:
  81                         return " Virtual NIC Hiper";
  82                 case QETH_CARD_TYPE_OSM:
  83                         return " Virtual NIC QDIO - OSM";
  84                 case QETH_CARD_TYPE_OSX:
  85                         return " Virtual NIC QDIO - OSX";
  86                 default:
  87                         return " unknown";
  88                 }
  89         } else {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " OSD Express";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " HiperSockets";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " OSM QDIO";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " OSX QDIO";
  99                 default:
 100                         return " unknown";
 101                 }
 102         }
 103         return " n/a";
 104 }
 105
 106 /* max length to be returned: 14 */
 107 const char *qeth_get_cardname_short(struct qeth_card *card)
 108 {
 109         if (IS_VM_NIC(card)) {
 110                 switch (card->info.type) {
 111                 case QETH_CARD_TYPE_OSD:
 112                         return "Virt.NIC QDIO";
 113                 case QETH_CARD_TYPE_IQD:
 114                         return "Virt.NIC Hiper";
 115                 case QETH_CARD_TYPE_OSM:
 116                         return "Virt.NIC OSM";
 117                 case QETH_CARD_TYPE_OSX:
 118                         return "Virt.NIC OSX";
 119                 default:
 120                         return "unknown";
 121                 }
 122         } else {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         switch (card->info.link_type) {
 126                         case QETH_LINK_TYPE_FAST_ETH:
 127                                 return "OSD_100";
 128                         case QETH_LINK_TYPE_HSTR:
 129                                 return "HSTR";
 130                         case QETH_LINK_TYPE_GBIT_ETH:
 131                                 return "OSD_1000";
 132                         case QETH_LINK_TYPE_10GBIT_ETH:
 133                                 return "OSD_10GIG";
 134                         case QETH_LINK_TYPE_25GBIT_ETH:
 135                                 return "OSD_25GIG";
 136                         case QETH_LINK_TYPE_LANE_ETH100:
 137                                 return "OSD_FE_LANE";
 138                         case QETH_LINK_TYPE_LANE_TR:
 139                                 return "OSD_TR_LANE";
 140                         case QETH_LINK_TYPE_LANE_ETH1000:
 141                                 return "OSD_GbE_LANE";
 142                         case QETH_LINK_TYPE_LANE:
 143                                 return "OSD_ATM_LANE";
 144                         default:
 145                                 return "OSD_Express";
 146                         }
 147                 case QETH_CARD_TYPE_IQD:
 148                         return "HiperSockets";
 149                 case QETH_CARD_TYPE_OSM:
 150                         return "OSM_1000";
 151                 case QETH_CARD_TYPE_OSX:
 152                         return "OSX_10GIG";
 153                 default:
 154                         return "unknown";
 155                 }
 156         }
 157         return "n/a";
 158 }
 159
 160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 161                          int clear_start_mask)
 162 {
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&card->thread_mask_lock, flags);
 166         card->thread_allowed_mask = threads;
 167         if (clear_start_mask)
 168                 card->thread_start_mask &= threads;
 169         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 170         wake_up(&card->wait_q);
 171 }
 172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 173
 174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 175 {
 176         unsigned long flags;
 177         int rc = 0;
 178
 179         spin_lock_irqsave(&card->thread_mask_lock, flags);
 180         rc = (card->thread_running_mask & threads);
 181         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 182         return rc;
 183 }
 184 EXPORT_SYMBOL_GPL(qeth_threads_running);
 185
 186 static void qeth_clear_working_pool_list(struct qeth_card *card)
 187 {
 188         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 189         struct qeth_qdio_q *queue = card->qdio.in_q;
 190         unsigned int i;
 191
 192         QETH_CARD_TEXT(card, 5, "clwrklst");
 193         list_for_each_entry_safe(pool_entry, tmp,
 194                                  &card->qdio.in_buf_pool.entry_list, list)
 195                 list_del(&pool_entry->list);
 196
 197         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 198                 queue->bufs[i].pool_entry = NULL;
 199 }
 200
 201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 202 {
 203         unsigned int i;
 204
 205         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 206                 if (entry->elements[i])
 207                         __free_page(entry->elements[i]);
 208         }
 209
 210         kfree(entry);
 211 }
 212
 213 static void qeth_free_buffer_pool(struct qeth_card *card)
 214 {
 215         struct qeth_buffer_pool_entry *entry, *tmp;
 216
 217         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 218                                  init_list) {
 219                 list_del(&entry->init_list);
 220                 qeth_free_pool_entry(entry);
 221         }
 222 }
 223
 224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 225 {
 226         struct qeth_buffer_pool_entry *entry;
 227         unsigned int i;
 228
 229         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 230         if (!entry)
 231                 return NULL;
 232
 233         for (i = 0; i < pages; i++) {
 234                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 235
 236                 if (!entry->elements[i]) {
 237                         qeth_free_pool_entry(entry);
 238                         return NULL;
 239                 }
 240         }
 241
 242         return entry;
 243 }
 244
 245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 246 {
 247         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 248         unsigned int i;
 249
 250         QETH_CARD_TEXT(card, 5, "alocpool");
 251         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 252                 struct qeth_buffer_pool_entry *entry;
 253
 254                 entry = qeth_alloc_pool_entry(buf_elements);
 255                 if (!entry) {
 256                         qeth_free_buffer_pool(card);
 257                         return -ENOMEM;
 258                 }
 259
 260                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 261         }
 262         return 0;
 263 }
 264
 265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 266 {
 267         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 268         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 269         struct qeth_buffer_pool_entry *entry, *tmp;
 270         int delta = count - pool->buf_count;
 271         LIST_HEAD(entries);
 272
 273         QETH_CARD_TEXT(card, 2, "realcbp");
 274
 275         /* Defer until pool is allocated: */
 276         if (list_empty(&pool->entry_list))
 277                 goto out;
 278
 279         /* Remove entries from the pool: */
 280         while (delta < 0) {
 281                 entry = list_first_entry(&pool->entry_list,
 282                                          struct qeth_buffer_pool_entry,
 283                                          init_list);
 284                 list_del(&entry->init_list);
 285                 qeth_free_pool_entry(entry);
 286
 287                 delta++;
 288         }
 289
 290         /* Allocate additional entries: */
 291         while (delta > 0) {
 292                 entry = qeth_alloc_pool_entry(buf_elements);
 293                 if (!entry) {
 294                         list_for_each_entry_safe(entry, tmp, &entries,
 295                                                  init_list) {
 296                                 list_del(&entry->init_list);
 297                                 qeth_free_pool_entry(entry);
 298                         }
 299
 300                         return -ENOMEM;
 301                 }
 302
 303                 list_add(&entry->init_list, &entries);
 304
 305                 delta--;
 306         }
 307
 308         list_splice(&entries, &pool->entry_list);
 309
 310 out:
 311         card->qdio.in_buf_pool.buf_count = count;
 312         pool->buf_count = count;
 313         return 0;
 314 }
 315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 316
 317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 318 {
 319         if (!q)
 320                 return;
 321
 322         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 323         kfree(q);
 324 }
 325
 326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 327 {
 328         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 329         int i;
 330
 331         if (!q)
 332                 return NULL;
 333
 334         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 335                 kfree(q);
 336                 return NULL;
 337         }
 338
 339         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 340                 q->bufs[i].buffer = q->qdio_bufs[i];
 341
 342         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 343         return q;
 344 }
 345
 346 static int qeth_cq_init(struct qeth_card *card)
 347 {
 348         int rc;
 349
 350         if (card->options.cq == QETH_CQ_ENABLED) {
 351                 QETH_CARD_TEXT(card, 2, "cqinit");
 352                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 353                                    QDIO_MAX_BUFFERS_PER_Q);
 354                 card->qdio.c_q->next_buf_to_init = 127;
 355
 356                 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
 357                 if (rc) {
 358                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 359                         goto out;
 360                 }
 361         }
 362         rc = 0;
 363 out:
 364         return rc;
 365 }
 366
 367 static int qeth_alloc_cq(struct qeth_card *card)
 368 {
 369         if (card->options.cq == QETH_CQ_ENABLED) {
 370                 QETH_CARD_TEXT(card, 2, "cqon");
 371                 card->qdio.c_q = qeth_alloc_qdio_queue();
 372                 if (!card->qdio.c_q) {
 373                         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 374                         return -ENOMEM;
 375                 }
 376         } else {
 377                 QETH_CARD_TEXT(card, 2, "nocq");
 378                 card->qdio.c_q = NULL;
 379         }
 380         return 0;
 381 }
 382
 383 static void qeth_free_cq(struct qeth_card *card)
 384 {
 385         if (card->qdio.c_q) {
 386                 qeth_free_qdio_queue(card->qdio.c_q);
 387                 card->qdio.c_q = NULL;
 388         }
 389 }
 390
 391 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 392                                                         int delayed)
 393 {
 394         enum iucv_tx_notify n;
 395
 396         switch (sbalf15) {
 397         case 0:
 398                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 399                 break;
 400         case 4:
 401         case 16:
 402         case 17:
 403         case 18:
 404                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 405                         TX_NOTIFY_UNREACHABLE;
 406                 break;
 407         default:
 408                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 409                         TX_NOTIFY_GENERALERROR;
 410                 break;
 411         }
 412
 413         return n;
 414 }
 415
 416 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 417 {
 418         if (refcount_dec_and_test(&iob->ref_count)) {
 419                 kfree(iob->data);
 420                 kfree(iob);
 421         }
 422 }
 423 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 424                            void *data)
 425 {
 426         ccw->cmd_code = cmd_code;
 427         ccw->flags = flags | CCW_FLAG_SLI;
 428         ccw->count = len;
 429         ccw->cda = (__u32)virt_to_phys(data);
 430 }
 431
 432 static int __qeth_issue_next_read(struct qeth_card *card)
 433 {
 434         struct qeth_cmd_buffer *iob = card->read_cmd;
 435         struct qeth_channel *channel = iob->channel;
 436         struct ccw1 *ccw = __ccw_from_cmd(iob);
 437         int rc;
 438
 439         QETH_CARD_TEXT(card, 5, "issnxrd");
 440         if (channel->state != CH_STATE_UP)
 441                 return -EIO;
 442
 443         memset(iob->data, 0, iob->length);
 444         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 445         iob->callback = qeth_issue_next_read_cb;
 446         /* keep the cmd alive after completion: */
 447         qeth_get_cmd(iob);
 448
 449         QETH_CARD_TEXT(card, 6, "noirqpnd");
 450         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 451         if (!rc) {
 452                 channel->active_cmd = iob;
 453         } else {
 454                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 455                                  rc, CARD_DEVID(card));
 456                 qeth_unlock_channel(card, channel);
 457                 qeth_put_cmd(iob);
 458                 card->read_or_write_problem = 1;
 459                 qeth_schedule_recovery(card);
 460         }
 461         return rc;
 462 }
 463
 464 static int qeth_issue_next_read(struct qeth_card *card)
 465 {
 466         int ret;
 467
 468         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 469         ret = __qeth_issue_next_read(card);
 470         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 471
 472         return ret;
 473 }
 474
 475 static void qeth_enqueue_cmd(struct qeth_card *card,
 476                              struct qeth_cmd_buffer *iob)
 477 {
 478         spin_lock_irq(&card->lock);
 479         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 480         spin_unlock_irq(&card->lock);
 481 }
 482
 483 static void qeth_dequeue_cmd(struct qeth_card *card,
 484                              struct qeth_cmd_buffer *iob)
 485 {
 486         spin_lock_irq(&card->lock);
 487         list_del(&iob->list_entry);
 488         spin_unlock_irq(&card->lock);
 489 }
 490
 491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 492 {
 493         iob->rc = reason;
 494         complete(&iob->done);
 495 }
 496
 497 static void qeth_flush_local_addrs4(struct qeth_card *card)
 498 {
 499         struct qeth_local_addr *addr;
 500         struct hlist_node *tmp;
 501         unsigned int i;
 502
 503         spin_lock_irq(&card->local_addrs4_lock);
 504         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 505                 hash_del_rcu(&addr->hnode);
 506                 kfree_rcu(addr, rcu);
 507         }
 508         spin_unlock_irq(&card->local_addrs4_lock);
 509 }
 510
 511 static void qeth_flush_local_addrs6(struct qeth_card *card)
 512 {
 513         struct qeth_local_addr *addr;
 514         struct hlist_node *tmp;
 515         unsigned int i;
 516
 517         spin_lock_irq(&card->local_addrs6_lock);
 518         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 519                 hash_del_rcu(&addr->hnode);
 520                 kfree_rcu(addr, rcu);
 521         }
 522         spin_unlock_irq(&card->local_addrs6_lock);
 523 }
 524
 525 static void qeth_flush_local_addrs(struct qeth_card *card)
 526 {
 527         qeth_flush_local_addrs4(card);
 528         qeth_flush_local_addrs6(card);
 529 }
 530
 531 static void qeth_add_local_addrs4(struct qeth_card *card,
 532                                   struct qeth_ipacmd_local_addrs4 *cmd)
 533 {
 534         unsigned int i;
 535
 536         if (cmd->addr_length !=
 537             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 538                 dev_err_ratelimited(&card->gdev->dev,
 539                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 540                                     cmd->addr_length);
 541                 return;
 542         }
 543
 544         spin_lock(&card->local_addrs4_lock);
 545         for (i = 0; i < cmd->count; i++) {
 546                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 547                 struct qeth_local_addr *addr;
 548                 bool duplicate = false;
 549
 550                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 551                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 552                                 duplicate = true;
 553                                 break;
 554                         }
 555                 }
 556
 557                 if (duplicate)
 558                         continue;
 559
 560                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 561                 if (!addr) {
 562                         dev_err(&card->gdev->dev,
 563                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 564                                 &cmd->addrs[i].addr);
 565                         continue;
 566                 }
 567
 568                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 569                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 570         }
 571         spin_unlock(&card->local_addrs4_lock);
 572 }
 573
 574 static void qeth_add_local_addrs6(struct qeth_card *card,
 575                                   struct qeth_ipacmd_local_addrs6 *cmd)
 576 {
 577         unsigned int i;
 578
 579         if (cmd->addr_length !=
 580             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 581                 dev_err_ratelimited(&card->gdev->dev,
 582                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 583                                     cmd->addr_length);
 584                 return;
 585         }
 586
 587         spin_lock(&card->local_addrs6_lock);
 588         for (i = 0; i < cmd->count; i++) {
 589                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 590                 struct qeth_local_addr *addr;
 591                 bool duplicate = false;
 592
 593                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 594                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 595                                 duplicate = true;
 596                                 break;
 597                         }
 598                 }
 599
 600                 if (duplicate)
 601                         continue;
 602
 603                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 604                 if (!addr) {
 605                         dev_err(&card->gdev->dev,
 606                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 607                                 &cmd->addrs[i].addr);
 608                         continue;
 609                 }
 610
 611                 addr->addr = cmd->addrs[i].addr;
 612                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 613         }
 614         spin_unlock(&card->local_addrs6_lock);
 615 }
 616
 617 static void qeth_del_local_addrs4(struct qeth_card *card,
 618                                   struct qeth_ipacmd_local_addrs4 *cmd)
 619 {
 620         unsigned int i;
 621
 622         if (cmd->addr_length !=
 623             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 624                 dev_err_ratelimited(&card->gdev->dev,
 625                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 626                                     cmd->addr_length);
 627                 return;
 628         }
 629
 630         spin_lock(&card->local_addrs4_lock);
 631         for (i = 0; i < cmd->count; i++) {
 632                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 633                 unsigned int key = ipv4_addr_hash(addr->addr);
 634                 struct qeth_local_addr *tmp;
 635
 636                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 637                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 638                                 hash_del_rcu(&tmp->hnode);
 639                                 kfree_rcu(tmp, rcu);
 640                                 break;
 641                         }
 642                 }
 643         }
 644         spin_unlock(&card->local_addrs4_lock);
 645 }
 646
 647 static void qeth_del_local_addrs6(struct qeth_card *card,
 648                                   struct qeth_ipacmd_local_addrs6 *cmd)
 649 {
 650         unsigned int i;
 651
 652         if (cmd->addr_length !=
 653             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 654                 dev_err_ratelimited(&card->gdev->dev,
 655                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 656                                     cmd->addr_length);
 657                 return;
 658         }
 659
 660         spin_lock(&card->local_addrs6_lock);
 661         for (i = 0; i < cmd->count; i++) {
 662                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 663                 u32 key = ipv6_addr_hash(&addr->addr);
 664                 struct qeth_local_addr *tmp;
 665
 666                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 667                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 668                                 hash_del_rcu(&tmp->hnode);
 669                                 kfree_rcu(tmp, rcu);
 670                                 break;
 671                         }
 672                 }
 673         }
 674         spin_unlock(&card->local_addrs6_lock);
 675 }
 676
 677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 678                                       struct sk_buff *skb)
 679 {
 680         struct qeth_local_addr *tmp;
 681         bool is_local = false;
 682         unsigned int key;
 683         __be32 next_hop;
 684
 685         if (hash_empty(card->local_addrs4))
 686                 return false;
 687
 688         rcu_read_lock();
 689         next_hop = qeth_next_hop_v4_rcu(skb,
 690                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 691         key = ipv4_addr_hash(next_hop);
 692
 693         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 694                 if (tmp->addr.s6_addr32[3] == next_hop) {
 695                         is_local = true;
 696                         break;
 697                 }
 698         }
 699         rcu_read_unlock();
 700
 701         return is_local;
 702 }
 703
 704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 705                                       struct sk_buff *skb)
 706 {
 707         struct qeth_local_addr *tmp;
 708         struct in6_addr *next_hop;
 709         bool is_local = false;
 710         u32 key;
 711
 712         if (hash_empty(card->local_addrs6))
 713                 return false;
 714
 715         rcu_read_lock();
 716         next_hop = qeth_next_hop_v6_rcu(skb,
 717                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 718         key = ipv6_addr_hash(next_hop);
 719
 720         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 721                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 722                         is_local = true;
 723                         break;
 724                 }
 725         }
 726         rcu_read_unlock();
 727
 728         return is_local;
 729 }
 730
 731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 732 {
 733         struct qeth_card *card = m->private;
 734         struct qeth_local_addr *tmp;
 735         unsigned int i;
 736
 737         rcu_read_lock();
 738         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 739                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 740         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 741                 seq_printf(m, "%pI6c\n", &tmp->addr);
 742         rcu_read_unlock();
 743
 744         return 0;
 745 }
 746
 747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 748
 749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 750                 struct qeth_card *card)
 751 {
 752         const char *ipa_name;
 753         int com = cmd->hdr.command;
 754
 755         ipa_name = qeth_get_ipa_cmd_name(com);
 756
 757         if (rc)
 758                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 759                                  ipa_name, com, CARD_DEVID(card), rc,
 760                                  qeth_get_ipa_msg(rc));
 761         else
 762                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 763                                  ipa_name, com, CARD_DEVID(card));
 764 }
 765
 766 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 767                                                 struct qeth_ipa_cmd *cmd)
 768 {
 769         QETH_CARD_TEXT(card, 5, "chkipad");
 770
 771         if (IS_IPA_REPLY(cmd)) {
 772                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 773                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 774                 return cmd;
 775         }
 776
 777         /* handle unsolicited event: */
 778         switch (cmd->hdr.command) {
 779         case IPA_CMD_STOPLAN:
 780                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 781                         dev_err(&card->gdev->dev,
 782                                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
 783                                 netdev_name(card->dev));
 784                         /* Set offline, then probably fail to set online: */
 785                         qeth_schedule_recovery(card);
 786                 } else {
 787                         /* stay online for subsequent STARTLAN */
 788                         dev_warn(&card->gdev->dev,
 789                                  "The link for interface %s on CHPID 0x%X failed\n",
 790                                  netdev_name(card->dev), card->info.chpid);
 791                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 792                         netif_carrier_off(card->dev);
 793                 }
 794                 return NULL;
 795         case IPA_CMD_STARTLAN:
 796                 dev_info(&card->gdev->dev,
 797                          "The link for %s on CHPID 0x%X has been restored\n",
 798                          netdev_name(card->dev), card->info.chpid);
 799                 if (card->info.hwtrap)
 800                         card->info.hwtrap = 2;
 801                 qeth_schedule_recovery(card);
 802                 return NULL;
 803         case IPA_CMD_SETBRIDGEPORT_IQD:
 804         case IPA_CMD_SETBRIDGEPORT_OSA:
 805         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 806                 if (card->discipline->control_event_handler(card, cmd))
 807                         return cmd;
 808                 return NULL;
 809         case IPA_CMD_REGISTER_LOCAL_ADDR:
 810                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 811                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 812                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 813                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 814
 815                 QETH_CARD_TEXT(card, 3, "irla");
 816                 return NULL;
 817         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 818                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 819                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 820                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 821                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 822
 823                 QETH_CARD_TEXT(card, 3, "urla");
 824                 return NULL;
 825         default:
 826                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 827                 return cmd;
 828         }
 829 }
 830
 831 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 832 {
 833         struct qeth_cmd_buffer *iob;
 834         unsigned long flags;
 835
 836         QETH_CARD_TEXT(card, 4, "clipalst");
 837
 838         spin_lock_irqsave(&card->lock, flags);
 839         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 840                 qeth_notify_cmd(iob, -ECANCELED);
 841         spin_unlock_irqrestore(&card->lock, flags);
 842 }
 843
 844 static int qeth_check_idx_response(struct qeth_card *card,
 845         unsigned char *buffer)
 846 {
 847         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 848         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 849                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 850                                  buffer[4]);
 851                 QETH_CARD_TEXT(card, 2, "ckidxres");
 852                 QETH_CARD_TEXT(card, 2, " idxterm");
 853                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 854                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 855                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 856                         dev_err(&card->gdev->dev,
 857                                 "The device does not support the configured transport mode\n");
 858                         return -EPROTONOSUPPORT;
 859                 }
 860                 return -EIO;
 861         }
 862         return 0;
 863 }
 864
 865 static void qeth_release_buffer_cb(struct qeth_card *card,
 866                                    struct qeth_cmd_buffer *iob,
 867                                    unsigned int data_length)
 868 {
 869         qeth_put_cmd(iob);
 870 }
 871
 872 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 873 {
 874         qeth_notify_cmd(iob, rc);
 875         qeth_put_cmd(iob);
 876 }
 877
 878 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 879                                               unsigned int length,
 880                                               unsigned int ccws, long timeout)
 881 {
 882         struct qeth_cmd_buffer *iob;
 883
 884         if (length > QETH_BUFSIZE)
 885                 return NULL;
 886
 887         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 888         if (!iob)
 889                 return NULL;
 890
 891         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 892                             GFP_KERNEL | GFP_DMA);
 893         if (!iob->data) {
 894                 kfree(iob);
 895                 return NULL;
 896         }
 897
 898         init_completion(&iob->done);
 899         spin_lock_init(&iob->lock);
 900         refcount_set(&iob->ref_count, 1);
 901         iob->channel = channel;
 902         iob->timeout = timeout;
 903         iob->length = length;
 904         return iob;
 905 }
 906
 907 static void qeth_issue_next_read_cb(struct qeth_card *card,
 908                                     struct qeth_cmd_buffer *iob,
 909                                     unsigned int data_length)
 910 {
 911         struct qeth_cmd_buffer *request = NULL;
 912         struct qeth_ipa_cmd *cmd = NULL;
 913         struct qeth_reply *reply = NULL;
 914         struct qeth_cmd_buffer *tmp;
 915         unsigned long flags;
 916         int rc = 0;
 917
 918         QETH_CARD_TEXT(card, 4, "sndctlcb");
 919         rc = qeth_check_idx_response(card, iob->data);
 920         switch (rc) {
 921         case 0:
 922                 break;
 923         case -EIO:
 924                 qeth_schedule_recovery(card);
 925                 fallthrough;
 926         default:
 927                 qeth_clear_ipacmd_list(card);
 928                 goto err_idx;
 929         }
 930
 931         cmd = __ipa_reply(iob);
 932         if (cmd) {
 933                 cmd = qeth_check_ipa_data(card, cmd);
 934                 if (!cmd)
 935                         goto out;
 936         }
 937
 938         /* match against pending cmd requests */
 939         spin_lock_irqsave(&card->lock, flags);
 940         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 941                 if (tmp->match && tmp->match(tmp, iob)) {
 942                         request = tmp;
 943                         /* take the object outside the lock */
 944                         qeth_get_cmd(request);
 945                         break;
 946                 }
 947         }
 948         spin_unlock_irqrestore(&card->lock, flags);
 949
 950         if (!request)
 951                 goto out;
 952
 953         reply = &request->reply;
 954         if (!reply->callback) {
 955                 rc = 0;
 956                 goto no_callback;
 957         }
 958
 959         spin_lock_irqsave(&request->lock, flags);
 960         if (request->rc)
 961                 /* Bail out when the requestor has already left: */
 962                 rc = request->rc;
 963         else
 964                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 965                                                         (unsigned long)iob);
 966         spin_unlock_irqrestore(&request->lock, flags);
 967
 968 no_callback:
 969         if (rc <= 0)
 970                 qeth_notify_cmd(request, rc);
 971         qeth_put_cmd(request);
 972 out:
 973         memcpy(&card->seqno.pdu_hdr_ack,
 974                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 975                 QETH_SEQ_NO_LENGTH);
 976         __qeth_issue_next_read(card);
 977 err_idx:
 978         qeth_put_cmd(iob);
 979 }
 980
 981 static int qeth_set_thread_start_bit(struct qeth_card *card,
 982                 unsigned long thread)
 983 {
 984         unsigned long flags;
 985         int rc = 0;
 986
 987         spin_lock_irqsave(&card->thread_mask_lock, flags);
 988         if (!(card->thread_allowed_mask & thread))
 989                 rc = -EPERM;
 990         else if (card->thread_start_mask & thread)
 991                 rc = -EBUSY;
 992         else
 993                 card->thread_start_mask |= thread;
 994         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 995
 996         return rc;
 997 }
 998
 999 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1000                                         unsigned long thread)
1001 {
1002         unsigned long flags;
1003
1004         spin_lock_irqsave(&card->thread_mask_lock, flags);
1005         card->thread_start_mask &= ~thread;
1006         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1007         wake_up(&card->wait_q);
1008 }
1009
1010 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1011                                           unsigned long thread)
1012 {
1013         unsigned long flags;
1014
1015         spin_lock_irqsave(&card->thread_mask_lock, flags);
1016         card->thread_running_mask &= ~thread;
1017         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1018         wake_up_all(&card->wait_q);
1019 }
1020
1021 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1022 {
1023         unsigned long flags;
1024         int rc = 0;
1025
1026         spin_lock_irqsave(&card->thread_mask_lock, flags);
1027         if (card->thread_start_mask & thread) {
1028                 if ((card->thread_allowed_mask & thread) &&
1029                     !(card->thread_running_mask & thread)) {
1030                         rc = 1;
1031                         card->thread_start_mask &= ~thread;
1032                         card->thread_running_mask |= thread;
1033                 } else
1034                         rc = -EPERM;
1035         }
1036         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1037         return rc;
1038 }
1039
1040 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1041 {
1042         int rc = 0;
1043
1044         wait_event(card->wait_q,
1045                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1046         return rc;
1047 }
1048
1049 int qeth_schedule_recovery(struct qeth_card *card)
1050 {
1051         int rc;
1052
1053         QETH_CARD_TEXT(card, 2, "startrec");
1054
1055         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1056         if (!rc)
1057                 schedule_work(&card->kernel_thread_starter);
1058
1059         return rc;
1060 }
1061
1062 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1063                             struct irb *irb)
1064 {
1065         int dstat, cstat;
1066         char *sense;
1067
1068         sense = (char *) irb->ecw;
1069         cstat = irb->scsw.cmd.cstat;
1070         dstat = irb->scsw.cmd.dstat;
1071
1072         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1073                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1074                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1075                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1076                 dev_warn(&cdev->dev, "The qeth device driver "
1077                         "failed to recover an error on the device\n");
1078                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1079                                  CCW_DEVID(cdev), dstat, cstat);
1080                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1081                                 16, 1, irb, 64, 1);
1082                 return -EIO;
1083         }
1084
1085         if (dstat & DEV_STAT_UNIT_CHECK) {
1086                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1087                     SENSE_RESETTING_EVENT_FLAG) {
1088                         QETH_CARD_TEXT(card, 2, "REVIND");
1089                         return -EIO;
1090                 }
1091                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1092                     SENSE_COMMAND_REJECT_FLAG) {
1093                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1094                         return -EIO;
1095                 }
1096                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1097                         QETH_CARD_TEXT(card, 2, "AFFE");
1098                         return -EIO;
1099                 }
1100                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1101                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1102                         return 0;
1103                 }
1104                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1105                 return -EIO;
1106         }
1107         return 0;
1108 }
1109
1110 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1111                                 struct irb *irb)
1112 {
1113         if (!IS_ERR(irb))
1114                 return 0;
1115
1116         switch (PTR_ERR(irb)) {
1117         case -EIO:
1118                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1119                                  CCW_DEVID(cdev));
1120                 QETH_CARD_TEXT(card, 2, "ckirberr");
1121                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1122                 return -EIO;
1123         case -ETIMEDOUT:
1124                 dev_warn(&cdev->dev, "A hardware operation timed out"
1125                         " on the device\n");
1126                 QETH_CARD_TEXT(card, 2, "ckirberr");
1127                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1128                 return -ETIMEDOUT;
1129         default:
1130                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1131                                  PTR_ERR(irb), CCW_DEVID(cdev));
1132                 QETH_CARD_TEXT(card, 2, "ckirberr");
1133                 QETH_CARD_TEXT(card, 2, "  rc???");
1134                 return PTR_ERR(irb);
1135         }
1136 }
1137
1138 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1139                 struct irb *irb)
1140 {
1141         int rc;
1142         int cstat, dstat;
1143         struct qeth_cmd_buffer *iob = NULL;
1144         struct ccwgroup_device *gdev;
1145         struct qeth_channel *channel;
1146         struct qeth_card *card;
1147
1148         /* while we hold the ccwdev lock, this stays valid: */
1149         gdev = dev_get_drvdata(&cdev->dev);
1150         card = dev_get_drvdata(&gdev->dev);
1151
1152         QETH_CARD_TEXT(card, 5, "irq");
1153
1154         if (card->read.ccwdev == cdev) {
1155                 channel = &card->read;
1156                 QETH_CARD_TEXT(card, 5, "read");
1157         } else if (card->write.ccwdev == cdev) {
1158                 channel = &card->write;
1159                 QETH_CARD_TEXT(card, 5, "write");
1160         } else {
1161                 channel = &card->data;
1162                 QETH_CARD_TEXT(card, 5, "data");
1163         }
1164
1165         if (intparm == 0) {
1166                 QETH_CARD_TEXT(card, 5, "irqunsol");
1167         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1168                 QETH_CARD_TEXT(card, 5, "irqunexp");
1169
1170                 dev_err(&cdev->dev,
1171                         "Received IRQ with intparm %lx, expected %px\n",
1172                         intparm, channel->active_cmd);
1173                 if (channel->active_cmd)
1174                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1175         } else {
1176                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1177         }
1178
1179         qeth_unlock_channel(card, channel);
1180
1181         rc = qeth_check_irb_error(card, cdev, irb);
1182         if (rc) {
1183                 /* IO was terminated, free its resources. */
1184                 if (iob)
1185                         qeth_cancel_cmd(iob, rc);
1186                 return;
1187         }
1188
1189         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1190                 channel->state = CH_STATE_STOPPED;
1191                 wake_up(&card->wait_q);
1192         }
1193
1194         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1195                 channel->state = CH_STATE_HALTED;
1196                 wake_up(&card->wait_q);
1197         }
1198
1199         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1200                                           SCSW_FCTL_HALT_FUNC))) {
1201                 qeth_cancel_cmd(iob, -ECANCELED);
1202                 iob = NULL;
1203         }
1204
1205         cstat = irb->scsw.cmd.cstat;
1206         dstat = irb->scsw.cmd.dstat;
1207
1208         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1209             (dstat & DEV_STAT_UNIT_CHECK) ||
1210             (cstat)) {
1211                 if (irb->esw.esw0.erw.cons) {
1212                         dev_warn(&channel->ccwdev->dev,
1213                                 "The qeth device driver failed to recover "
1214                                 "an error on the device\n");
1215                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1216                                          CCW_DEVID(channel->ccwdev), cstat,
1217                                          dstat);
1218                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1219                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1220                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1221                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1222                 }
1223
1224                 rc = qeth_get_problem(card, cdev, irb);
1225                 if (rc) {
1226                         card->read_or_write_problem = 1;
1227                         if (iob)
1228                                 qeth_cancel_cmd(iob, rc);
1229                         qeth_clear_ipacmd_list(card);
1230                         qeth_schedule_recovery(card);
1231                         return;
1232                 }
1233         }
1234
1235         if (iob) {
1236                 /* sanity check: */
1237                 if (irb->scsw.cmd.count > iob->length) {
1238                         qeth_cancel_cmd(iob, -EIO);
1239                         return;
1240                 }
1241                 if (iob->callback)
1242                         iob->callback(card, iob,
1243                                       iob->length - irb->scsw.cmd.count);
1244         }
1245 }
1246
1247 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1248                 struct qeth_qdio_out_buffer *buf,
1249                 enum iucv_tx_notify notification)
1250 {
1251         struct sk_buff *skb;
1252
1253         skb_queue_walk(&buf->skb_list, skb) {
1254                 struct sock *sk = skb->sk;
1255
1256                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1257                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1258                 if (sk && sk->sk_family == PF_IUCV)
1259                         iucv_sk(sk)->sk_txnotify(sk, notification);
1260         }
1261 }
1262
1263 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1264                                  struct qeth_qdio_out_buffer *buf, bool error,
1265                                  int budget)
1266 {
1267         struct sk_buff *skb;
1268
1269         /* Empty buffer? */
1270         if (buf->next_element_to_fill == 0)
1271                 return;
1272
1273         QETH_TXQ_STAT_INC(queue, bufs);
1274         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1275         if (error) {
1276                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1277         } else {
1278                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1279                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1280         }
1281
1282         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1283                 unsigned int bytes = qdisc_pkt_len(skb);
1284                 bool is_tso = skb_is_gso(skb);
1285                 unsigned int packets;
1286
1287                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1288                 if (!error) {
1289                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1290                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1291                         if (skb_is_nonlinear(skb))
1292                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1293                         if (is_tso) {
1294                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1295                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1296                         }
1297                 }
1298
1299                 napi_consume_skb(skb, budget);
1300         }
1301 }
1302
1303 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1304                                      struct qeth_qdio_out_buffer *buf,
1305                                      bool error, int budget)
1306 {
1307         int i;
1308
1309         /* is PCI flag set on buffer? */
1310         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1311                 atomic_dec(&queue->set_pci_flags_count);
1312                 QETH_TXQ_STAT_INC(queue, completion_irq);
1313         }
1314
1315         qeth_tx_complete_buf(queue, buf, error, budget);
1316
1317         for (i = 0; i < queue->max_elements; ++i) {
1318                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1319
1320                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1321                         kmem_cache_free(qeth_core_header_cache, data);
1322         }
1323
1324         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1325         buf->next_element_to_fill = 0;
1326         buf->frames = 0;
1327         buf->bytes = 0;
1328         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1329 }
1330
1331 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1332 {
1333         if (buf->aob)
1334                 kmem_cache_free(qeth_qaob_cache, buf->aob);
1335         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1336 }
1337
1338 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1339                                           struct qeth_qdio_out_q *queue,
1340                                           bool drain, int budget)
1341 {
1342         struct qeth_qdio_out_buffer *buf, *tmp;
1343
1344         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1345                 struct qeth_qaob_priv1 *priv;
1346                 struct qaob *aob = buf->aob;
1347                 enum iucv_tx_notify notify;
1348                 unsigned int i;
1349
1350                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1351                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1352                         QETH_CARD_TEXT(card, 5, "fp");
1353                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1354
1355                         notify = drain ? TX_NOTIFY_GENERALERROR :
1356                                          qeth_compute_cq_notification(aob->aorc, 1);
1357                         qeth_notify_skbs(queue, buf, notify);
1358                         qeth_tx_complete_buf(queue, buf, drain, budget);
1359
1360                         for (i = 0;
1361                              i < aob->sb_count && i < queue->max_elements;
1362                              i++) {
1363                                 void *data = phys_to_virt(aob->sba[i]);
1364
1365                                 if (test_bit(i, buf->from_kmem_cache) && data)
1366                                         kmem_cache_free(qeth_core_header_cache,
1367                                                         data);
1368                         }
1369
1370                         list_del(&buf->list_entry);
1371                         qeth_free_out_buf(buf);
1372                 }
1373         }
1374 }
1375
1376 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1377 {
1378         int j;
1379
1380         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1381
1382         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1383                 if (!q->bufs[j])
1384                         continue;
1385
1386                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1387                 if (free) {
1388                         qeth_free_out_buf(q->bufs[j]);
1389                         q->bufs[j] = NULL;
1390                 }
1391         }
1392 }
1393
1394 static void qeth_drain_output_queues(struct qeth_card *card)
1395 {
1396         int i;
1397
1398         QETH_CARD_TEXT(card, 2, "clearqdbf");
1399         /* clear outbound buffers to free skbs */
1400         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1401                 if (card->qdio.out_qs[i])
1402                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1403         }
1404 }
1405
1406 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1407 {
1408         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1409
1410         if (card->qdio.no_out_queues == max)
1411                 return;
1412
1413         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1414                 qeth_free_qdio_queues(card);
1415
1416         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1417                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1418
1419         card->qdio.no_out_queues = max;
1420 }
1421
1422 static int qeth_update_from_chp_desc(struct qeth_card *card)
1423 {
1424         struct ccw_device *ccwdev;
1425         struct channel_path_desc_fmt0 *chp_dsc;
1426
1427         QETH_CARD_TEXT(card, 2, "chp_desc");
1428
1429         ccwdev = card->data.ccwdev;
1430         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1431         if (!chp_dsc)
1432                 return -ENOMEM;
1433
1434         card->info.func_level = 0x4100 + chp_dsc->desc;
1435
1436         if (IS_OSD(card) || IS_OSX(card))
1437                 /* CHPP field bit 6 == 1 -> single queue */
1438                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1439
1440         kfree(chp_dsc);
1441         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1442         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1443         return 0;
1444 }
1445
1446 static void qeth_init_qdio_info(struct qeth_card *card)
1447 {
1448         QETH_CARD_TEXT(card, 4, "intqdinf");
1449         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1450         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1451         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1452
1453         /* inbound */
1454         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1455         if (IS_IQD(card))
1456                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1457         else
1458                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1459         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1460         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1461         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1462 }
1463
1464 static void qeth_set_initial_options(struct qeth_card *card)
1465 {
1466         card->options.route4.type = NO_ROUTER;
1467         card->options.route6.type = NO_ROUTER;
1468         card->options.isolation = ISOLATION_MODE_NONE;
1469         card->options.cq = QETH_CQ_DISABLED;
1470         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1471 }
1472
1473 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1474 {
1475         unsigned long flags;
1476         int rc = 0;
1477
1478         spin_lock_irqsave(&card->thread_mask_lock, flags);
1479         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1480                         (u8) card->thread_start_mask,
1481                         (u8) card->thread_allowed_mask,
1482                         (u8) card->thread_running_mask);
1483         rc = (card->thread_start_mask & thread);
1484         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1485         return rc;
1486 }
1487
1488 static int qeth_do_reset(void *data);
1489 static void qeth_start_kernel_thread(struct work_struct *work)
1490 {
1491         struct task_struct *ts;
1492         struct qeth_card *card = container_of(work, struct qeth_card,
1493                                         kernel_thread_starter);
1494         QETH_CARD_TEXT(card, 2, "strthrd");
1495
1496         if (card->read.state != CH_STATE_UP &&
1497             card->write.state != CH_STATE_UP)
1498                 return;
1499         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1500                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1501                 if (IS_ERR(ts)) {
1502                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1503                         qeth_clear_thread_running_bit(card,
1504                                 QETH_RECOVER_THREAD);
1505                 }
1506         }
1507 }
1508
1509 static void qeth_buffer_reclaim_work(struct work_struct *);
1510 static void qeth_setup_card(struct qeth_card *card)
1511 {
1512         QETH_CARD_TEXT(card, 2, "setupcrd");
1513
1514         card->info.type = CARD_RDEV(card)->id.driver_info;
1515         card->state = CARD_STATE_DOWN;
1516         spin_lock_init(&card->lock);
1517         spin_lock_init(&card->thread_mask_lock);
1518         mutex_init(&card->conf_mutex);
1519         mutex_init(&card->discipline_mutex);
1520         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1521         INIT_LIST_HEAD(&card->cmd_waiter_list);
1522         init_waitqueue_head(&card->wait_q);
1523         qeth_set_initial_options(card);
1524         /* IP address takeover */
1525         INIT_LIST_HEAD(&card->ipato.entries);
1526         qeth_init_qdio_info(card);
1527         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1528         hash_init(card->rx_mode_addrs);
1529         hash_init(card->local_addrs4);
1530         hash_init(card->local_addrs6);
1531         spin_lock_init(&card->local_addrs4_lock);
1532         spin_lock_init(&card->local_addrs6_lock);
1533 }
1534
1535 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1536 {
1537         struct qeth_card *card = container_of(slr, struct qeth_card,
1538                                         qeth_service_level);
1539         if (card->info.mcl_level[0])
1540                 seq_printf(m, "qeth: %s firmware level %s\n",
1541                         CARD_BUS_ID(card), card->info.mcl_level);
1542 }
1543
1544 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1545 {
1546         struct qeth_card *card;
1547
1548         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1549         card = kzalloc(sizeof(*card), GFP_KERNEL);
1550         if (!card)
1551                 goto out;
1552         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1553
1554         card->gdev = gdev;
1555         dev_set_drvdata(&gdev->dev, card);
1556         CARD_RDEV(card) = gdev->cdev[0];
1557         CARD_WDEV(card) = gdev->cdev[1];
1558         CARD_DDEV(card) = gdev->cdev[2];
1559
1560         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1561                                                  dev_name(&gdev->dev));
1562         if (!card->event_wq)
1563                 goto out_wq;
1564
1565         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1566         if (!card->read_cmd)
1567                 goto out_read_cmd;
1568
1569         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1570                                            qeth_debugfs_root);
1571         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1572                             &qeth_debugfs_local_addr_fops);
1573
1574         card->qeth_service_level.seq_print = qeth_core_sl_print;
1575         register_service_level(&card->qeth_service_level);
1576         return card;
1577
1578 out_read_cmd:
1579         destroy_workqueue(card->event_wq);
1580 out_wq:
1581         dev_set_drvdata(&gdev->dev, NULL);
1582         kfree(card);
1583 out:
1584         return NULL;
1585 }
1586
1587 static int qeth_clear_channel(struct qeth_card *card,
1588                               struct qeth_channel *channel)
1589 {
1590         int rc;
1591
1592         QETH_CARD_TEXT(card, 3, "clearch");
1593         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1594         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1595         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1596
1597         if (rc)
1598                 return rc;
1599         rc = wait_event_interruptible_timeout(card->wait_q,
1600                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1601         if (rc == -ERESTARTSYS)
1602                 return rc;
1603         if (channel->state != CH_STATE_STOPPED)
1604                 return -ETIME;
1605         channel->state = CH_STATE_DOWN;
1606         return 0;
1607 }
1608
1609 static int qeth_halt_channel(struct qeth_card *card,
1610                              struct qeth_channel *channel)
1611 {
1612         int rc;
1613
1614         QETH_CARD_TEXT(card, 3, "haltch");
1615         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1616         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1617         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1618
1619         if (rc)
1620                 return rc;
1621         rc = wait_event_interruptible_timeout(card->wait_q,
1622                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1623         if (rc == -ERESTARTSYS)
1624                 return rc;
1625         if (channel->state != CH_STATE_HALTED)
1626                 return -ETIME;
1627         return 0;
1628 }
1629
1630 static int qeth_stop_channel(struct qeth_channel *channel)
1631 {
1632         struct ccw_device *cdev = channel->ccwdev;
1633         int rc;
1634
1635         rc = ccw_device_set_offline(cdev);
1636
1637         spin_lock_irq(get_ccwdev_lock(cdev));
1638         if (channel->active_cmd)
1639                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1640                         channel->active_cmd);
1641
1642         cdev->handler = NULL;
1643         spin_unlock_irq(get_ccwdev_lock(cdev));
1644
1645         return rc;
1646 }
1647
1648 static int qeth_start_channel(struct qeth_channel *channel)
1649 {
1650         struct ccw_device *cdev = channel->ccwdev;
1651         int rc;
1652
1653         channel->state = CH_STATE_DOWN;
1654         xchg(&channel->active_cmd, NULL);
1655
1656         spin_lock_irq(get_ccwdev_lock(cdev));
1657         cdev->handler = qeth_irq;
1658         spin_unlock_irq(get_ccwdev_lock(cdev));
1659
1660         rc = ccw_device_set_online(cdev);
1661         if (rc)
1662                 goto err;
1663
1664         return 0;
1665
1666 err:
1667         spin_lock_irq(get_ccwdev_lock(cdev));
1668         cdev->handler = NULL;
1669         spin_unlock_irq(get_ccwdev_lock(cdev));
1670         return rc;
1671 }
1672
1673 static int qeth_halt_channels(struct qeth_card *card)
1674 {
1675         int rc1 = 0, rc2 = 0, rc3 = 0;
1676
1677         QETH_CARD_TEXT(card, 3, "haltchs");
1678         rc1 = qeth_halt_channel(card, &card->read);
1679         rc2 = qeth_halt_channel(card, &card->write);
1680         rc3 = qeth_halt_channel(card, &card->data);
1681         if (rc1)
1682                 return rc1;
1683         if (rc2)
1684                 return rc2;
1685         return rc3;
1686 }
1687
1688 static int qeth_clear_channels(struct qeth_card *card)
1689 {
1690         int rc1 = 0, rc2 = 0, rc3 = 0;
1691
1692         QETH_CARD_TEXT(card, 3, "clearchs");
1693         rc1 = qeth_clear_channel(card, &card->read);
1694         rc2 = qeth_clear_channel(card, &card->write);
1695         rc3 = qeth_clear_channel(card, &card->data);
1696         if (rc1)
1697                 return rc1;
1698         if (rc2)
1699                 return rc2;
1700         return rc3;
1701 }
1702
1703 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1704 {
1705         int rc = 0;
1706
1707         QETH_CARD_TEXT(card, 3, "clhacrd");
1708
1709         if (halt)
1710                 rc = qeth_halt_channels(card);
1711         if (rc)
1712                 return rc;
1713         return qeth_clear_channels(card);
1714 }
1715
1716 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1717 {
1718         int rc = 0;
1719
1720         QETH_CARD_TEXT(card, 3, "qdioclr");
1721         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1722                 QETH_QDIO_CLEANING)) {
1723         case QETH_QDIO_ESTABLISHED:
1724                 if (IS_IQD(card))
1725                         rc = qdio_shutdown(CARD_DDEV(card),
1726                                 QDIO_FLAG_CLEANUP_USING_HALT);
1727                 else
1728                         rc = qdio_shutdown(CARD_DDEV(card),
1729                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1730                 if (rc)
1731                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1732                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1733                 break;
1734         case QETH_QDIO_CLEANING:
1735                 return rc;
1736         default:
1737                 break;
1738         }
1739         rc = qeth_clear_halt_card(card, use_halt);
1740         if (rc)
1741                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1742         return rc;
1743 }
1744
1745 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1746 {
1747         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1748         struct diag26c_vnic_resp *response = NULL;
1749         struct diag26c_vnic_req *request = NULL;
1750         struct ccw_dev_id id;
1751         char userid[80];
1752         int rc = 0;
1753
1754         QETH_CARD_TEXT(card, 2, "vmlayer");
1755
1756         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1757         if (rc)
1758                 goto out;
1759
1760         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1761         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1762         if (!request || !response) {
1763                 rc = -ENOMEM;
1764                 goto out;
1765         }
1766
1767         ccw_device_get_id(CARD_RDEV(card), &id);
1768         request->resp_buf_len = sizeof(*response);
1769         request->resp_version = DIAG26C_VERSION6_VM65918;
1770         request->req_format = DIAG26C_VNIC_INFO;
1771         ASCEBC(userid, 8);
1772         memcpy(&request->sys_name, userid, 8);
1773         request->devno = id.devno;
1774
1775         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1776         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1777         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1778         if (rc)
1779                 goto out;
1780         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1781
1782         if (request->resp_buf_len < sizeof(*response) ||
1783             response->version != request->resp_version) {
1784                 rc = -EIO;
1785                 goto out;
1786         }
1787
1788         if (response->protocol == VNIC_INFO_PROT_L2)
1789                 disc = QETH_DISCIPLINE_LAYER2;
1790         else if (response->protocol == VNIC_INFO_PROT_L3)
1791                 disc = QETH_DISCIPLINE_LAYER3;
1792
1793 out:
1794         kfree(response);
1795         kfree(request);
1796         if (rc)
1797                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1798         return disc;
1799 }
1800
1801 /* Determine whether the device requires a specific layer discipline */
1802 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1803 {
1804         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1805
1806         if (IS_OSM(card))
1807                 disc = QETH_DISCIPLINE_LAYER2;
1808         else if (IS_VM_NIC(card))
1809                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1810                                       qeth_vm_detect_layer(card);
1811
1812         switch (disc) {
1813         case QETH_DISCIPLINE_LAYER2:
1814                 QETH_CARD_TEXT(card, 3, "force l2");
1815                 break;
1816         case QETH_DISCIPLINE_LAYER3:
1817                 QETH_CARD_TEXT(card, 3, "force l3");
1818                 break;
1819         default:
1820                 QETH_CARD_TEXT(card, 3, "force no");
1821         }
1822
1823         return disc;
1824 }
1825
1826 static void qeth_set_blkt_defaults(struct qeth_card *card)
1827 {
1828         QETH_CARD_TEXT(card, 2, "cfgblkt");
1829
1830         if (card->info.use_v1_blkt) {
1831                 card->info.blkt.time_total = 0;
1832                 card->info.blkt.inter_packet = 0;
1833                 card->info.blkt.inter_packet_jumbo = 0;
1834         } else {
1835                 card->info.blkt.time_total = 250;
1836                 card->info.blkt.inter_packet = 5;
1837                 card->info.blkt.inter_packet_jumbo = 15;
1838         }
1839 }
1840
1841 static void qeth_idx_init(struct qeth_card *card)
1842 {
1843         memset(&card->seqno, 0, sizeof(card->seqno));
1844
1845         card->token.issuer_rm_w = 0x00010103UL;
1846         card->token.cm_filter_w = 0x00010108UL;
1847         card->token.cm_connection_w = 0x0001010aUL;
1848         card->token.ulp_filter_w = 0x0001010bUL;
1849         card->token.ulp_connection_w = 0x0001010dUL;
1850
1851         switch (card->info.type) {
1852         case QETH_CARD_TYPE_IQD:
1853                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1854                 break;
1855         case QETH_CARD_TYPE_OSD:
1856                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1857                 break;
1858         default:
1859                 break;
1860         }
1861 }
1862
1863 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1864                                   struct qeth_cmd_buffer *iob)
1865 {
1866         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1867                QETH_SEQ_NO_LENGTH);
1868         if (iob->channel == &card->write)
1869                 card->seqno.trans_hdr++;
1870 }
1871
1872 static int qeth_peer_func_level(int level)
1873 {
1874         if ((level & 0xff) == 8)
1875                 return (level & 0xff) + 0x400;
1876         if (((level >> 8) & 3) == 1)
1877                 return (level & 0xff) + 0x200;
1878         return level;
1879 }
1880
1881 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1882                                   struct qeth_cmd_buffer *iob)
1883 {
1884         qeth_idx_finalize_cmd(card, iob);
1885
1886         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1887                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1888         card->seqno.pdu_hdr++;
1889         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1890                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1891
1892         iob->callback = qeth_release_buffer_cb;
1893 }
1894
1895 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1896                                  struct qeth_cmd_buffer *reply)
1897 {
1898         /* MPC cmds are issued strictly in sequence. */
1899         return !IS_IPA(reply->data);
1900 }
1901
1902 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1903                                                   const void *data,
1904                                                   unsigned int data_length)
1905 {
1906         struct qeth_cmd_buffer *iob;
1907
1908         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1909         if (!iob)
1910                 return NULL;
1911
1912         memcpy(iob->data, data, data_length);
1913         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1914                        iob->data);
1915         iob->finalize = qeth_mpc_finalize_cmd;
1916         iob->match = qeth_mpc_match_reply;
1917         return iob;
1918 }
1919
1920 /**
1921  * qeth_send_control_data() -   send control command to the card
1922  * @card:                       qeth_card structure pointer
1923  * @iob:                        qeth_cmd_buffer pointer
1924  * @reply_cb:                   callback function pointer
1925  *  cb_card:                    pointer to the qeth_card structure
1926  *  cb_reply:                   pointer to the qeth_reply structure
1927  *  cb_cmd:                     pointer to the original iob for non-IPA
1928  *                              commands, or to the qeth_ipa_cmd structure
1929  *                              for the IPA commands.
1930  * @reply_param:                private pointer passed to the callback
1931  *
1932  * Callback function gets called one or more times, with cb_cmd
1933  * pointing to the response returned by the hardware. Callback
1934  * function must return
1935  *   > 0 if more reply blocks are expected,
1936  *     0 if the last or only reply block is received, and
1937  *   < 0 on error.
1938  * Callback function can get the value of the reply_param pointer from the
1939  * field 'param' of the structure qeth_reply.
1940  */
1941
1942 static int qeth_send_control_data(struct qeth_card *card,
1943                                   struct qeth_cmd_buffer *iob,
1944                                   int (*reply_cb)(struct qeth_card *cb_card,
1945                                                   struct qeth_reply *cb_reply,
1946                                                   unsigned long cb_cmd),
1947                                   void *reply_param)
1948 {
1949         struct qeth_channel *channel = iob->channel;
1950         struct qeth_reply *reply = &iob->reply;
1951         long timeout = iob->timeout;
1952         int rc;
1953
1954         QETH_CARD_TEXT(card, 2, "sendctl");
1955
1956         reply->callback = reply_cb;
1957         reply->param = reply_param;
1958
1959         timeout = wait_event_interruptible_timeout(card->wait_q,
1960                                                    qeth_trylock_channel(channel, iob),
1961                                                    timeout);
1962         if (timeout <= 0) {
1963                 qeth_put_cmd(iob);
1964                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1965         }
1966
1967         if (iob->finalize)
1968                 iob->finalize(card, iob);
1969         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1970
1971         qeth_enqueue_cmd(card, iob);
1972
1973         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1974         qeth_get_cmd(iob);
1975
1976         QETH_CARD_TEXT(card, 6, "noirqpnd");
1977         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1978         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1979                                       (addr_t) iob, 0, 0, timeout);
1980         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1981         if (rc) {
1982                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1983                                  CARD_DEVID(card), rc);
1984                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1985                 qeth_dequeue_cmd(card, iob);
1986                 qeth_put_cmd(iob);
1987                 qeth_unlock_channel(card, channel);
1988                 goto out;
1989         }
1990
1991         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1992                                                             timeout);
1993         if (timeout <= 0)
1994                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1995
1996         qeth_dequeue_cmd(card, iob);
1997
1998         if (reply_cb) {
1999                 /* Wait until the callback for a late reply has completed: */
2000                 spin_lock_irq(&iob->lock);
2001                 if (rc)
2002                         /* Zap any callback that's still pending: */
2003                         iob->rc = rc;
2004                 spin_unlock_irq(&iob->lock);
2005         }
2006
2007         if (!rc)
2008                 rc = iob->rc;
2009
2010 out:
2011         qeth_put_cmd(iob);
2012         return rc;
2013 }
2014
2015 struct qeth_node_desc {
2016         struct node_descriptor nd1;
2017         struct node_descriptor nd2;
2018         struct node_descriptor nd3;
2019 };
2020
2021 static void qeth_read_conf_data_cb(struct qeth_card *card,
2022                                    struct qeth_cmd_buffer *iob,
2023                                    unsigned int data_length)
2024 {
2025         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2026         int rc = 0;
2027         u8 *tag;
2028
2029         QETH_CARD_TEXT(card, 2, "cfgunit");
2030
2031         if (data_length < sizeof(*nd)) {
2032                 rc = -EINVAL;
2033                 goto out;
2034         }
2035
2036         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2037                                nd->nd1.plant[1] == _ascebc['M'];
2038         tag = (u8 *)&nd->nd1.tag;
2039         card->info.chpid = tag[0];
2040         card->info.unit_addr2 = tag[1];
2041
2042         tag = (u8 *)&nd->nd2.tag;
2043         card->info.cula = tag[1];
2044
2045         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2046                                  nd->nd3.model[1] == 0xF0 &&
2047                                  nd->nd3.model[2] >= 0xF1 &&
2048                                  nd->nd3.model[2] <= 0xF4;
2049
2050 out:
2051         qeth_notify_cmd(iob, rc);
2052         qeth_put_cmd(iob);
2053 }
2054
2055 static int qeth_read_conf_data(struct qeth_card *card)
2056 {
2057         struct qeth_channel *channel = &card->data;
2058         struct qeth_cmd_buffer *iob;
2059         struct ciw *ciw;
2060
2061         /* scan for RCD command in extended SenseID data */
2062         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2063         if (!ciw || ciw->cmd == 0)
2064                 return -EOPNOTSUPP;
2065         if (ciw->count < sizeof(struct qeth_node_desc))
2066                 return -EINVAL;
2067
2068         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2069         if (!iob)
2070                 return -ENOMEM;
2071
2072         iob->callback = qeth_read_conf_data_cb;
2073         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2074                        iob->data);
2075
2076         return qeth_send_control_data(card, iob, NULL, NULL);
2077 }
2078
2079 static int qeth_idx_check_activate_response(struct qeth_card *card,
2080                                             struct qeth_channel *channel,
2081                                             struct qeth_cmd_buffer *iob)
2082 {
2083         int rc;
2084
2085         rc = qeth_check_idx_response(card, iob->data);
2086         if (rc)
2087                 return rc;
2088
2089         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2090                 return 0;
2091
2092         /* negative reply: */
2093         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2094                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2095
2096         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2097         case QETH_IDX_ACT_ERR_EXCL:
2098                 dev_err(&channel->ccwdev->dev,
2099                         "The adapter is used exclusively by another host\n");
2100                 return -EBUSY;
2101         case QETH_IDX_ACT_ERR_AUTH:
2102         case QETH_IDX_ACT_ERR_AUTH_USER:
2103                 dev_err(&channel->ccwdev->dev,
2104                         "Setting the device online failed because of insufficient authorization\n");
2105                 return -EPERM;
2106         default:
2107                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2108                                  CCW_DEVID(channel->ccwdev));
2109                 return -EIO;
2110         }
2111 }
2112
2113 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2114                                               struct qeth_cmd_buffer *iob,
2115                                               unsigned int data_length)
2116 {
2117         struct qeth_channel *channel = iob->channel;
2118         u16 peer_level;
2119         int rc;
2120
2121         QETH_CARD_TEXT(card, 2, "idxrdcb");
2122
2123         rc = qeth_idx_check_activate_response(card, channel, iob);
2124         if (rc)
2125                 goto out;
2126
2127         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2128         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2129                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2130                                  CCW_DEVID(channel->ccwdev),
2131                                  card->info.func_level, peer_level);
2132                 rc = -EINVAL;
2133                 goto out;
2134         }
2135
2136         memcpy(&card->token.issuer_rm_r,
2137                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2138                QETH_MPC_TOKEN_LENGTH);
2139         memcpy(&card->info.mcl_level[0],
2140                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2141
2142 out:
2143         qeth_notify_cmd(iob, rc);
2144         qeth_put_cmd(iob);
2145 }
2146
2147 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2148                                                struct qeth_cmd_buffer *iob,
2149                                                unsigned int data_length)
2150 {
2151         struct qeth_channel *channel = iob->channel;
2152         u16 peer_level;
2153         int rc;
2154
2155         QETH_CARD_TEXT(card, 2, "idxwrcb");
2156
2157         rc = qeth_idx_check_activate_response(card, channel, iob);
2158         if (rc)
2159                 goto out;
2160
2161         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2162         if ((peer_level & ~0x0100) !=
2163             qeth_peer_func_level(card->info.func_level)) {
2164                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2165                                  CCW_DEVID(channel->ccwdev),
2166                                  card->info.func_level, peer_level);
2167                 rc = -EINVAL;
2168         }
2169
2170 out:
2171         qeth_notify_cmd(iob, rc);
2172         qeth_put_cmd(iob);
2173 }
2174
2175 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2176                                         struct qeth_cmd_buffer *iob)
2177 {
2178         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2179         u8 port = ((u8)card->dev->dev_port) | 0x80;
2180         struct ccw1 *ccw = __ccw_from_cmd(iob);
2181
2182         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2183                        iob->data);
2184         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2185         iob->finalize = qeth_idx_finalize_cmd;
2186
2187         port |= QETH_IDX_ACT_INVAL_FRAME;
2188         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2189         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2190                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2191         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2192                &card->info.func_level, 2);
2193         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2194         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2195 }
2196
2197 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2198 {
2199         struct qeth_channel *channel = &card->read;
2200         struct qeth_cmd_buffer *iob;
2201         int rc;
2202
2203         QETH_CARD_TEXT(card, 2, "idxread");
2204
2205         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2206         if (!iob)
2207                 return -ENOMEM;
2208
2209         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2210         qeth_idx_setup_activate_cmd(card, iob);
2211         iob->callback = qeth_idx_activate_read_channel_cb;
2212
2213         rc = qeth_send_control_data(card, iob, NULL, NULL);
2214         if (rc)
2215                 return rc;
2216
2217         channel->state = CH_STATE_UP;
2218         return 0;
2219 }
2220
2221 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2222 {
2223         struct qeth_channel *channel = &card->write;
2224         struct qeth_cmd_buffer *iob;
2225         int rc;
2226
2227         QETH_CARD_TEXT(card, 2, "idxwrite");
2228
2229         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2230         if (!iob)
2231                 return -ENOMEM;
2232
2233         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2234         qeth_idx_setup_activate_cmd(card, iob);
2235         iob->callback = qeth_idx_activate_write_channel_cb;
2236
2237         rc = qeth_send_control_data(card, iob, NULL, NULL);
2238         if (rc)
2239                 return rc;
2240
2241         channel->state = CH_STATE_UP;
2242         return 0;
2243 }
2244
2245 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2246                 unsigned long data)
2247 {
2248         struct qeth_cmd_buffer *iob;
2249
2250         QETH_CARD_TEXT(card, 2, "cmenblcb");
2251
2252         iob = (struct qeth_cmd_buffer *) data;
2253         memcpy(&card->token.cm_filter_r,
2254                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2255                QETH_MPC_TOKEN_LENGTH);
2256         return 0;
2257 }
2258
2259 static int qeth_cm_enable(struct qeth_card *card)
2260 {
2261         struct qeth_cmd_buffer *iob;
2262
2263         QETH_CARD_TEXT(card, 2, "cmenable");
2264
2265         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2266         if (!iob)
2267                 return -ENOMEM;
2268
2269         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2270                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2271         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2272                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2273
2274         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2275 }
2276
2277 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2278                 unsigned long data)
2279 {
2280         struct qeth_cmd_buffer *iob;
2281
2282         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2283
2284         iob = (struct qeth_cmd_buffer *) data;
2285         memcpy(&card->token.cm_connection_r,
2286                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2287                QETH_MPC_TOKEN_LENGTH);
2288         return 0;
2289 }
2290
2291 static int qeth_cm_setup(struct qeth_card *card)
2292 {
2293         struct qeth_cmd_buffer *iob;
2294
2295         QETH_CARD_TEXT(card, 2, "cmsetup");
2296
2297         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2298         if (!iob)
2299                 return -ENOMEM;
2300
2301         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2302                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2303         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2304                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2305         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2306                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2307         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2308 }
2309
2310 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2311 {
2312         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2313             link_type == QETH_LINK_TYPE_HSTR) {
2314                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2315                 return false;
2316         }
2317
2318         return true;
2319 }
2320
2321 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2322 {
2323         struct net_device *dev = card->dev;
2324         unsigned int new_mtu;
2325
2326         if (!max_mtu) {
2327                 /* IQD needs accurate max MTU to set up its RX buffers: */
2328                 if (IS_IQD(card))
2329                         return -EINVAL;
2330                 /* tolerate quirky HW: */
2331                 max_mtu = ETH_MAX_MTU;
2332         }
2333
2334         rtnl_lock();
2335         if (IS_IQD(card)) {
2336                 /* move any device with default MTU to new max MTU: */
2337                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2338
2339                 /* adjust RX buffer size to new max MTU: */
2340                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2341                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2342                         qeth_free_qdio_queues(card);
2343         } else {
2344                 if (dev->mtu)
2345                         new_mtu = dev->mtu;
2346                 /* default MTUs for first setup: */
2347                 else if (IS_LAYER2(card))
2348                         new_mtu = ETH_DATA_LEN;
2349                 else
2350                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2351         }
2352
2353         dev->max_mtu = max_mtu;
2354         dev->mtu = min(new_mtu, max_mtu);
2355         rtnl_unlock();
2356         return 0;
2357 }
2358
2359 static int qeth_get_mtu_outof_framesize(int framesize)
2360 {
2361         switch (framesize) {
2362         case 0x4000:
2363                 return 8192;
2364         case 0x6000:
2365                 return 16384;
2366         case 0xa000:
2367                 return 32768;
2368         case 0xffff:
2369                 return 57344;
2370         default:
2371                 return 0;
2372         }
2373 }
2374
2375 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2376                 unsigned long data)
2377 {
2378         __u16 mtu, framesize;
2379         __u16 len;
2380         struct qeth_cmd_buffer *iob;
2381         u8 link_type = 0;
2382
2383         QETH_CARD_TEXT(card, 2, "ulpenacb");
2384
2385         iob = (struct qeth_cmd_buffer *) data;
2386         memcpy(&card->token.ulp_filter_r,
2387                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2388                QETH_MPC_TOKEN_LENGTH);
2389         if (IS_IQD(card)) {
2390                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2391                 mtu = qeth_get_mtu_outof_framesize(framesize);
2392         } else {
2393                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2394         }
2395         *(u16 *)reply->param = mtu;
2396
2397         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2398         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2399                 memcpy(&link_type,
2400                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2401                 if (!qeth_is_supported_link_type(card, link_type))
2402                         return -EPROTONOSUPPORT;
2403         }
2404
2405         card->info.link_type = link_type;
2406         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2407         return 0;
2408 }
2409
2410 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2411 {
2412         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2413 }
2414
2415 static int qeth_ulp_enable(struct qeth_card *card)
2416 {
2417         u8 prot_type = qeth_mpc_select_prot_type(card);
2418         struct qeth_cmd_buffer *iob;
2419         u16 max_mtu;
2420         int rc;
2421
2422         QETH_CARD_TEXT(card, 2, "ulpenabl");
2423
2424         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2425         if (!iob)
2426                 return -ENOMEM;
2427
2428         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2429         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2430         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2431                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2432         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2433                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2434         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2435         if (rc)
2436                 return rc;
2437         return qeth_update_max_mtu(card, max_mtu);
2438 }
2439
2440 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2441                 unsigned long data)
2442 {
2443         struct qeth_cmd_buffer *iob;
2444
2445         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2446
2447         iob = (struct qeth_cmd_buffer *) data;
2448         memcpy(&card->token.ulp_connection_r,
2449                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2450                QETH_MPC_TOKEN_LENGTH);
2451         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2452                      3)) {
2453                 QETH_CARD_TEXT(card, 2, "olmlimit");
2454                 dev_err(&card->gdev->dev, "A connection could not be "
2455                         "established because of an OLM limit\n");
2456                 return -EMLINK;
2457         }
2458         return 0;
2459 }
2460
2461 static int qeth_ulp_setup(struct qeth_card *card)
2462 {
2463         __u16 temp;
2464         struct qeth_cmd_buffer *iob;
2465
2466         QETH_CARD_TEXT(card, 2, "ulpsetup");
2467
2468         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2469         if (!iob)
2470                 return -ENOMEM;
2471
2472         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2473                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2474         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2475                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2476         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2477                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2478
2479         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2480         temp = (card->info.cula << 8) + card->info.unit_addr2;
2481         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2482         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2483 }
2484
2485 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2486                               gfp_t gfp)
2487 {
2488         struct qeth_qdio_out_buffer *newbuf;
2489
2490         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2491         if (!newbuf)
2492                 return -ENOMEM;
2493
2494         newbuf->buffer = q->qdio_bufs[bidx];
2495         skb_queue_head_init(&newbuf->skb_list);
2496         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2497         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2498         q->bufs[bidx] = newbuf;
2499         return 0;
2500 }
2501
2502 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2503 {
2504         if (!q)
2505                 return;
2506
2507         qeth_drain_output_queue(q, true);
2508         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2509         kfree(q);
2510 }
2511
2512 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2513 {
2514         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2515         unsigned int i;
2516
2517         if (!q)
2518                 return NULL;
2519
2520         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2521                 goto err_qdio_bufs;
2522
2523         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2524                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2525                         goto err_out_bufs;
2526         }
2527
2528         return q;
2529
2530 err_out_bufs:
2531         while (i > 0)
2532                 qeth_free_out_buf(q->bufs[--i]);
2533         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2534 err_qdio_bufs:
2535         kfree(q);
2536         return NULL;
2537 }
2538
2539 static void qeth_tx_completion_timer(struct timer_list *timer)
2540 {
2541         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2542
2543         napi_schedule(&queue->napi);
2544         QETH_TXQ_STAT_INC(queue, completion_timer);
2545 }
2546
2547 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2548 {
2549         unsigned int i;
2550
2551         QETH_CARD_TEXT(card, 2, "allcqdbf");
2552
2553         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2554                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2555                 return 0;
2556
2557         /* inbound buffer pool */
2558         if (qeth_alloc_buffer_pool(card))
2559                 goto out_buffer_pool;
2560
2561         /* outbound */
2562         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2563                 struct qeth_qdio_out_q *queue;
2564
2565                 queue = qeth_alloc_output_queue();
2566                 if (!queue)
2567                         goto out_freeoutq;
2568                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2569                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2570                 card->qdio.out_qs[i] = queue;
2571                 queue->card = card;
2572                 queue->queue_no = i;
2573                 INIT_LIST_HEAD(&queue->pending_bufs);
2574                 spin_lock_init(&queue->lock);
2575                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2576                 if (IS_IQD(card)) {
2577                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2578                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2579                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2580                 } else {
2581                         queue->coalesce_usecs = USEC_PER_SEC;
2582                         queue->max_coalesced_frames = 0;
2583                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2584                 }
2585                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2586         }
2587
2588         /* completion */
2589         if (qeth_alloc_cq(card))
2590                 goto out_freeoutq;
2591
2592         return 0;
2593
2594 out_freeoutq:
2595         while (i > 0) {
2596                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2597                 card->qdio.out_qs[i] = NULL;
2598         }
2599         qeth_free_buffer_pool(card);
2600 out_buffer_pool:
2601         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2602         return -ENOMEM;
2603 }
2604
2605 static void qeth_free_qdio_queues(struct qeth_card *card)
2606 {
2607         int i, j;
2608
2609         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2610                 QETH_QDIO_UNINITIALIZED)
2611                 return;
2612
2613         qeth_free_cq(card);
2614         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2615                 if (card->qdio.in_q->bufs[j].rx_skb) {
2616                         consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2617                         card->qdio.in_q->bufs[j].rx_skb = NULL;
2618                 }
2619         }
2620
2621         /* inbound buffer pool */
2622         qeth_free_buffer_pool(card);
2623         /* free outbound qdio_qs */
2624         for (i = 0; i < card->qdio.no_out_queues; i++) {
2625                 qeth_free_output_queue(card->qdio.out_qs[i]);
2626                 card->qdio.out_qs[i] = NULL;
2627         }
2628 }
2629
2630 static void qeth_fill_qib_parms(struct qeth_card *card,
2631                                 struct qeth_qib_parms *parms)
2632 {
2633         struct qeth_qdio_out_q *queue;
2634         unsigned int i;
2635
2636         parms->pcit_magic[0] = 'P';
2637         parms->pcit_magic[1] = 'C';
2638         parms->pcit_magic[2] = 'I';
2639         parms->pcit_magic[3] = 'T';
2640         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2641         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2642         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2643         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2644
2645         parms->blkt_magic[0] = 'B';
2646         parms->blkt_magic[1] = 'L';
2647         parms->blkt_magic[2] = 'K';
2648         parms->blkt_magic[3] = 'T';
2649         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2650         parms->blkt_total = card->info.blkt.time_total;
2651         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2652         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2653
2654         /* Prio-queueing implicitly uses the default priorities: */
2655         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2656                 return;
2657
2658         parms->pque_magic[0] = 'P';
2659         parms->pque_magic[1] = 'Q';
2660         parms->pque_magic[2] = 'U';
2661         parms->pque_magic[3] = 'E';
2662         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2663         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2664         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2665
2666         qeth_for_each_output_queue(card, queue, i)
2667                 parms->pque_priority[i] = queue->priority;
2668 }
2669
2670 static int qeth_qdio_activate(struct qeth_card *card)
2671 {
2672         QETH_CARD_TEXT(card, 3, "qdioact");
2673         return qdio_activate(CARD_DDEV(card));
2674 }
2675
2676 static int qeth_dm_act(struct qeth_card *card)
2677 {
2678         struct qeth_cmd_buffer *iob;
2679
2680         QETH_CARD_TEXT(card, 2, "dmact");
2681
2682         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2683         if (!iob)
2684                 return -ENOMEM;
2685
2686         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2687                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2688         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2689                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2690         return qeth_send_control_data(card, iob, NULL, NULL);
2691 }
2692
2693 static int qeth_mpc_initialize(struct qeth_card *card)
2694 {
2695         int rc;
2696
2697         QETH_CARD_TEXT(card, 2, "mpcinit");
2698
2699         rc = qeth_issue_next_read(card);
2700         if (rc) {
2701                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2702                 return rc;
2703         }
2704         rc = qeth_cm_enable(card);
2705         if (rc) {
2706                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2707                 return rc;
2708         }
2709         rc = qeth_cm_setup(card);
2710         if (rc) {
2711                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2712                 return rc;
2713         }
2714         rc = qeth_ulp_enable(card);
2715         if (rc) {
2716                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2717                 return rc;
2718         }
2719         rc = qeth_ulp_setup(card);
2720         if (rc) {
2721                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2722                 return rc;
2723         }
2724         rc = qeth_alloc_qdio_queues(card);
2725         if (rc) {
2726                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2727                 return rc;
2728         }
2729         rc = qeth_qdio_establish(card);
2730         if (rc) {
2731                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2732                 qeth_free_qdio_queues(card);
2733                 return rc;
2734         }
2735         rc = qeth_qdio_activate(card);
2736         if (rc) {
2737                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2738                 return rc;
2739         }
2740         rc = qeth_dm_act(card);
2741         if (rc) {
2742                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2743                 return rc;
2744         }
2745
2746         return 0;
2747 }
2748
2749 static void qeth_print_status_message(struct qeth_card *card)
2750 {
2751         switch (card->info.type) {
2752         case QETH_CARD_TYPE_OSD:
2753         case QETH_CARD_TYPE_OSM:
2754         case QETH_CARD_TYPE_OSX:
2755                 /* VM will use a non-zero first character
2756                  * to indicate a HiperSockets like reporting
2757                  * of the level OSA sets the first character to zero
2758                  * */
2759                 if (!card->info.mcl_level[0]) {
2760                         sprintf(card->info.mcl_level, "%02x%02x",
2761                                 card->info.mcl_level[2],
2762                                 card->info.mcl_level[3]);
2763                         break;
2764                 }
2765                 fallthrough;
2766         case QETH_CARD_TYPE_IQD:
2767                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2768                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2769                                 card->info.mcl_level[0]];
2770                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2771                                 card->info.mcl_level[1]];
2772                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2773                                 card->info.mcl_level[2]];
2774                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2775                                 card->info.mcl_level[3]];
2776                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2777                 }
2778                 break;
2779         default:
2780                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2781         }
2782         dev_info(&card->gdev->dev,
2783                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2784                  qeth_get_cardname(card),
2785                  (card->info.mcl_level[0]) ? " (level: " : "",
2786                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2787                  (card->info.mcl_level[0]) ? ")" : "",
2788                  qeth_get_cardname_short(card));
2789 }
2790
2791 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2792 {
2793         struct qeth_buffer_pool_entry *entry;
2794
2795         QETH_CARD_TEXT(card, 5, "inwrklst");
2796
2797         list_for_each_entry(entry,
2798                             &card->qdio.init_pool.entry_list, init_list) {
2799                 qeth_put_buffer_pool_entry(card, entry);
2800         }
2801 }
2802
2803 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2804                                         struct qeth_card *card)
2805 {
2806         struct qeth_buffer_pool_entry *entry;
2807         int i, free;
2808
2809         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2810                 return NULL;
2811
2812         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2813                 free = 1;
2814                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2815                         if (page_count(entry->elements[i]) > 1) {
2816                                 free = 0;
2817                                 break;
2818                         }
2819                 }
2820                 if (free) {
2821                         list_del_init(&entry->list);
2822                         return entry;
2823                 }
2824         }
2825
2826         /* no free buffer in pool so take first one and swap pages */
2827         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2828                                  struct qeth_buffer_pool_entry, list);
2829         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2830                 if (page_count(entry->elements[i]) > 1) {
2831                         struct page *page = dev_alloc_page();
2832
2833                         if (!page)
2834                                 return NULL;
2835
2836                         __free_page(entry->elements[i]);
2837                         entry->elements[i] = page;
2838                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2839                 }
2840         }
2841         list_del_init(&entry->list);
2842         return entry;
2843 }
2844
2845 static int qeth_init_input_buffer(struct qeth_card *card,
2846                 struct qeth_qdio_buffer *buf)
2847 {
2848         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2849         int i;
2850
2851         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2852                 buf->rx_skb = netdev_alloc_skb(card->dev,
2853                                                ETH_HLEN +
2854                                                sizeof(struct ipv6hdr));
2855                 if (!buf->rx_skb)
2856                         return -ENOMEM;
2857         }
2858
2859         if (!pool_entry) {
2860                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2861                 if (!pool_entry)
2862                         return -ENOBUFS;
2863
2864                 buf->pool_entry = pool_entry;
2865         }
2866
2867         /*
2868          * since the buffer is accessed only from the input_tasklet
2869          * there shouldn't be a need to synchronize; also, since we use
2870          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2871          * buffers
2872          */
2873         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2874                 buf->buffer->element[i].length = PAGE_SIZE;
2875                 buf->buffer->element[i].addr =
2876                         page_to_phys(pool_entry->elements[i]);
2877                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2878                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2879                 else
2880                         buf->buffer->element[i].eflags = 0;
2881                 buf->buffer->element[i].sflags = 0;
2882         }
2883         return 0;
2884 }
2885
2886 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2887                                             struct qeth_qdio_out_q *queue)
2888 {
2889         if (!IS_IQD(card) ||
2890             qeth_iqd_is_mcast_queue(card, queue) ||
2891             card->options.cq == QETH_CQ_ENABLED ||
2892             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2893                 return 1;
2894
2895         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2896 }
2897
2898 static int qeth_init_qdio_queues(struct qeth_card *card)
2899 {
2900         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2901         unsigned int i;
2902         int rc;
2903
2904         QETH_CARD_TEXT(card, 2, "initqdqs");
2905
2906         /* inbound queue */
2907         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2908         memset(&card->rx, 0, sizeof(struct qeth_rx));
2909
2910         qeth_initialize_working_pool_list(card);
2911         /*give only as many buffers to hardware as we have buffer pool entries*/
2912         for (i = 0; i < rx_bufs; i++) {
2913                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2914                 if (rc)
2915                         return rc;
2916         }
2917
2918         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2919         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
2920         if (rc) {
2921                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2922                 return rc;
2923         }
2924
2925         /* completion */
2926         rc = qeth_cq_init(card);
2927         if (rc) {
2928                 return rc;
2929         }
2930
2931         /* outbound queue */
2932         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2933                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2934
2935                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2936                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2937                 queue->next_buf_to_fill = 0;
2938                 queue->do_pack = 0;
2939                 queue->prev_hdr = NULL;
2940                 queue->coalesced_frames = 0;
2941                 queue->bulk_start = 0;
2942                 queue->bulk_count = 0;
2943                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2944                 atomic_set(&queue->used_buffers, 0);
2945                 atomic_set(&queue->set_pci_flags_count, 0);
2946                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2947         }
2948         return 0;
2949 }
2950
2951 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2952                                   struct qeth_cmd_buffer *iob)
2953 {
2954         qeth_mpc_finalize_cmd(card, iob);
2955
2956         /* override with IPA-specific values: */
2957         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2958 }
2959
2960 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
2961                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
2962 {
2963         u8 prot_type = qeth_mpc_select_prot_type(card);
2964         u16 total_length = iob->length;
2965
2966         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2967                        iob->data);
2968         iob->finalize = qeth_ipa_finalize_cmd;
2969
2970         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2971         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2972         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2973         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2974         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2975         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2976                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2977         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2978 }
2979
2980 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
2981                                  struct qeth_cmd_buffer *reply)
2982 {
2983         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
2984
2985         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
2986 }
2987
2988 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2989                                            enum qeth_ipa_cmds cmd_code,
2990                                            enum qeth_prot_versions prot,
2991                                            unsigned int data_length)
2992 {
2993         struct qeth_cmd_buffer *iob;
2994         struct qeth_ipacmd_hdr *hdr;
2995
2996         data_length += offsetof(struct qeth_ipa_cmd, data);
2997         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2998                              QETH_IPA_TIMEOUT);
2999         if (!iob)
3000                 return NULL;
3001
3002         qeth_prepare_ipa_cmd(card, iob, data_length);
3003         iob->match = qeth_ipa_match_reply;
3004
3005         hdr = &__ipa_cmd(iob)->hdr;
3006         hdr->command = cmd_code;
3007         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3008         /* hdr->seqno is set by qeth_send_control_data() */
3009         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3010         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3011         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3012         hdr->param_count = 1;
3013         hdr->prot_version = prot;
3014         return iob;
3015 }
3016 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3017
3018 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3019                                 struct qeth_reply *reply, unsigned long data)
3020 {
3021         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3022
3023         return (cmd->hdr.return_code) ? -EIO : 0;
3024 }
3025
3026 /*
3027  * qeth_send_ipa_cmd() - send an IPA command
3028  *
3029  * See qeth_send_control_data() for explanation of the arguments.
3030  */
3031
3032 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3033                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3034                         unsigned long),
3035                 void *reply_param)
3036 {
3037         int rc;
3038
3039         QETH_CARD_TEXT(card, 4, "sendipa");
3040
3041         if (card->read_or_write_problem) {
3042                 qeth_put_cmd(iob);
3043                 return -EIO;
3044         }
3045
3046         if (reply_cb == NULL)
3047                 reply_cb = qeth_send_ipa_cmd_cb;
3048         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3049         if (rc == -ETIME) {
3050                 qeth_clear_ipacmd_list(card);
3051                 qeth_schedule_recovery(card);
3052         }
3053         return rc;
3054 }
3055 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3056
3057 static int qeth_send_startlan_cb(struct qeth_card *card,
3058                                  struct qeth_reply *reply, unsigned long data)
3059 {
3060         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3061
3062         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3063                 return -ENETDOWN;
3064
3065         return (cmd->hdr.return_code) ? -EIO : 0;
3066 }
3067
3068 static int qeth_send_startlan(struct qeth_card *card)
3069 {
3070         struct qeth_cmd_buffer *iob;
3071
3072         QETH_CARD_TEXT(card, 2, "strtlan");
3073
3074         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3075         if (!iob)
3076                 return -ENOMEM;
3077         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3078 }
3079
3080 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3081 {
3082         if (!cmd->hdr.return_code)
3083                 cmd->hdr.return_code =
3084                         cmd->data.setadapterparms.hdr.return_code;
3085         return cmd->hdr.return_code;
3086 }
3087
3088 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3089                 struct qeth_reply *reply, unsigned long data)
3090 {
3091         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3092         struct qeth_query_cmds_supp *query_cmd;
3093
3094         QETH_CARD_TEXT(card, 3, "quyadpcb");
3095         if (qeth_setadpparms_inspect_rc(cmd))
3096                 return -EIO;
3097
3098         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3099         if (query_cmd->lan_type & 0x7f) {
3100                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3101                         return -EPROTONOSUPPORT;
3102
3103                 card->info.link_type = query_cmd->lan_type;
3104                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3105         }
3106
3107         card->options.adp.supported = query_cmd->supported_cmds;
3108         return 0;
3109 }
3110
3111 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3112                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3113                                                     unsigned int data_length)
3114 {
3115         struct qeth_ipacmd_setadpparms_hdr *hdr;
3116         struct qeth_cmd_buffer *iob;
3117
3118         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3119                                  data_length +
3120                                  offsetof(struct qeth_ipacmd_setadpparms,
3121                                           data));
3122         if (!iob)
3123                 return NULL;
3124
3125         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3126         hdr->cmdlength = sizeof(*hdr) + data_length;
3127         hdr->command_code = adp_cmd;
3128         hdr->used_total = 1;
3129         hdr->seq_no = 1;
3130         return iob;
3131 }
3132
3133 static int qeth_query_setadapterparms(struct qeth_card *card)
3134 {
3135         int rc;
3136         struct qeth_cmd_buffer *iob;
3137
3138         QETH_CARD_TEXT(card, 3, "queryadp");
3139         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3140                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3141         if (!iob)
3142                 return -ENOMEM;
3143         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3144         return rc;
3145 }
3146
3147 static int qeth_query_ipassists_cb(struct qeth_card *card,
3148                 struct qeth_reply *reply, unsigned long data)
3149 {
3150         struct qeth_ipa_cmd *cmd;
3151
3152         QETH_CARD_TEXT(card, 2, "qipasscb");
3153
3154         cmd = (struct qeth_ipa_cmd *) data;
3155
3156         switch (cmd->hdr.return_code) {
3157         case IPA_RC_SUCCESS:
3158                 break;
3159         case IPA_RC_NOTSUPP:
3160         case IPA_RC_L2_UNSUPPORTED_CMD:
3161                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3162                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3163                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3164                 return -EOPNOTSUPP;
3165         default:
3166                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3167                                  CARD_DEVID(card), cmd->hdr.return_code);
3168                 return -EIO;
3169         }
3170
3171         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3172                 card->options.ipa4 = cmd->hdr.assists;
3173         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3174                 card->options.ipa6 = cmd->hdr.assists;
3175         else
3176                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3177                                  CARD_DEVID(card));
3178         return 0;
3179 }
3180
3181 static int qeth_query_ipassists(struct qeth_card *card,
3182                                 enum qeth_prot_versions prot)
3183 {
3184         int rc;
3185         struct qeth_cmd_buffer *iob;
3186
3187         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3188         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3189         if (!iob)
3190                 return -ENOMEM;
3191         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3192         return rc;
3193 }
3194
3195 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3196                                 struct qeth_reply *reply, unsigned long data)
3197 {
3198         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3199         struct qeth_query_switch_attributes *attrs;
3200         struct qeth_switch_info *sw_info;
3201
3202         QETH_CARD_TEXT(card, 2, "qswiatcb");
3203         if (qeth_setadpparms_inspect_rc(cmd))
3204                 return -EIO;
3205
3206         sw_info = (struct qeth_switch_info *)reply->param;
3207         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3208         sw_info->capabilities = attrs->capabilities;
3209         sw_info->settings = attrs->settings;
3210         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3211                         sw_info->settings);
3212         return 0;
3213 }
3214
3215 int qeth_query_switch_attributes(struct qeth_card *card,
3216                                  struct qeth_switch_info *sw_info)
3217 {
3218         struct qeth_cmd_buffer *iob;
3219
3220         QETH_CARD_TEXT(card, 2, "qswiattr");
3221         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3222                 return -EOPNOTSUPP;
3223         if (!netif_carrier_ok(card->dev))
3224                 return -ENOMEDIUM;
3225         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3226         if (!iob)
3227                 return -ENOMEM;
3228         return qeth_send_ipa_cmd(card, iob,
3229                                 qeth_query_switch_attributes_cb, sw_info);
3230 }
3231
3232 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3233                                           enum qeth_diags_cmds sub_cmd,
3234                                           unsigned int data_length)
3235 {
3236         struct qeth_ipacmd_diagass *cmd;
3237         struct qeth_cmd_buffer *iob;
3238
3239         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3240                                  DIAG_HDR_LEN + data_length);
3241         if (!iob)
3242                 return NULL;
3243
3244         cmd = &__ipa_cmd(iob)->data.diagass;
3245         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3246         cmd->subcmd = sub_cmd;
3247         return iob;
3248 }
3249 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3250
3251 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3252                 struct qeth_reply *reply, unsigned long data)
3253 {
3254         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3255         u16 rc = cmd->hdr.return_code;
3256
3257         if (rc) {
3258                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3259                 return -EIO;
3260         }
3261
3262         card->info.diagass_support = cmd->data.diagass.ext;
3263         return 0;
3264 }
3265
3266 static int qeth_query_setdiagass(struct qeth_card *card)
3267 {
3268         struct qeth_cmd_buffer *iob;
3269
3270         QETH_CARD_TEXT(card, 2, "qdiagass");
3271         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3272         if (!iob)
3273                 return -ENOMEM;
3274         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3275 }
3276
3277 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3278 {
3279         unsigned long info = get_zeroed_page(GFP_KERNEL);
3280         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3281         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3282         struct ccw_dev_id ccwid;
3283         int level;
3284
3285         tid->chpid = card->info.chpid;
3286         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3287         tid->ssid = ccwid.ssid;
3288         tid->devno = ccwid.devno;
3289         if (!info)
3290                 return;
3291         level = stsi(NULL, 0, 0, 0);
3292         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3293                 tid->lparnr = info222->lpar_number;
3294         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3295                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3296                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3297         }
3298         free_page(info);
3299 }
3300
3301 static int qeth_hw_trap_cb(struct qeth_card *card,
3302                 struct qeth_reply *reply, unsigned long data)
3303 {
3304         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3305         u16 rc = cmd->hdr.return_code;
3306
3307         if (rc) {
3308                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3309                 return -EIO;
3310         }
3311         return 0;
3312 }
3313
3314 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3315 {
3316         struct qeth_cmd_buffer *iob;
3317         struct qeth_ipa_cmd *cmd;
3318
3319         QETH_CARD_TEXT(card, 2, "diagtrap");
3320         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3321         if (!iob)
3322                 return -ENOMEM;
3323         cmd = __ipa_cmd(iob);
3324         cmd->data.diagass.type = 1;
3325         cmd->data.diagass.action = action;
3326         switch (action) {
3327         case QETH_DIAGS_TRAP_ARM:
3328                 cmd->data.diagass.options = 0x0003;
3329                 cmd->data.diagass.ext = 0x00010000 +
3330                         sizeof(struct qeth_trap_id);
3331                 qeth_get_trap_id(card,
3332                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3333                 break;
3334         case QETH_DIAGS_TRAP_DISARM:
3335                 cmd->data.diagass.options = 0x0001;
3336                 break;
3337         case QETH_DIAGS_TRAP_CAPTURE:
3338                 break;
3339         }
3340         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3341 }
3342
3343 static int qeth_check_qdio_errors(struct qeth_card *card,
3344                                   struct qdio_buffer *buf,
3345                                   unsigned int qdio_error,
3346                                   const char *dbftext)
3347 {
3348         if (qdio_error) {
3349                 QETH_CARD_TEXT(card, 2, dbftext);
3350                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3351                                buf->element[15].sflags);
3352                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3353                                buf->element[14].sflags);
3354                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3355                 if ((buf->element[15].sflags) == 0x12) {
3356                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3357                         return 0;
3358                 } else
3359                         return 1;
3360         }
3361         return 0;
3362 }
3363
3364 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3365                                          unsigned int count)
3366 {
3367         struct qeth_qdio_q *queue = card->qdio.in_q;
3368         struct list_head *lh;
3369         int i;
3370         int rc;
3371         int newcount = 0;
3372
3373         /* only requeue at a certain threshold to avoid SIGAs */
3374         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3375                 for (i = queue->next_buf_to_init;
3376                      i < queue->next_buf_to_init + count; ++i) {
3377                         if (qeth_init_input_buffer(card,
3378                                 &queue->bufs[QDIO_BUFNR(i)])) {
3379                                 break;
3380                         } else {
3381                                 newcount++;
3382                         }
3383                 }
3384
3385                 if (newcount < count) {
3386                         /* we are in memory shortage so we switch back to
3387                            traditional skb allocation and drop packages */
3388                         atomic_set(&card->force_alloc_skb, 3);
3389                         count = newcount;
3390                 } else {
3391                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3392                 }
3393
3394                 if (!count) {
3395                         i = 0;
3396                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3397                                 i++;
3398                         if (i == card->qdio.in_buf_pool.buf_count) {
3399                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3400                                 schedule_delayed_work(
3401                                         &card->buffer_reclaim_work,
3402                                         QETH_RECLAIM_WORK_TIME);
3403                         }
3404                         return 0;
3405                 }
3406
3407                 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3408                                                   queue->next_buf_to_init,
3409                                                   count);
3410                 if (rc) {
3411                         QETH_CARD_TEXT(card, 2, "qinberr");
3412                 }
3413                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3414                                                      count);
3415                 return count;
3416         }
3417
3418         return 0;
3419 }
3420
3421 static void qeth_buffer_reclaim_work(struct work_struct *work)
3422 {
3423         struct qeth_card *card = container_of(to_delayed_work(work),
3424                                               struct qeth_card,
3425                                               buffer_reclaim_work);
3426
3427         local_bh_disable();
3428         napi_schedule(&card->napi);
3429         /* kick-start the NAPI softirq: */
3430         local_bh_enable();
3431 }
3432
3433 static void qeth_handle_send_error(struct qeth_card *card,
3434                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3435 {
3436         int sbalf15 = buffer->buffer->element[15].sflags;
3437
3438         QETH_CARD_TEXT(card, 6, "hdsnderr");
3439         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3440
3441         if (!qdio_err)
3442                 return;
3443
3444         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3445                 return;
3446
3447         QETH_CARD_TEXT(card, 1, "lnkfail");
3448         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3449                        (u16)qdio_err, (u8)sbalf15);
3450 }
3451
3452 /**
3453  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3454  * @queue: queue to check for packing buffer
3455  *
3456  * Returns number of buffers that were prepared for flush.
3457  */
3458 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3459 {
3460         struct qeth_qdio_out_buffer *buffer;
3461
3462         buffer = queue->bufs[queue->next_buf_to_fill];
3463         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3464             (buffer->next_element_to_fill > 0)) {
3465                 /* it's a packing buffer */
3466                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3467                 queue->next_buf_to_fill =
3468                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3469                 return 1;
3470         }
3471         return 0;
3472 }
3473
3474 /*
3475  * Switched to packing state if the number of used buffers on a queue
3476  * reaches a certain limit.
3477  */
3478 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3479 {
3480         if (!queue->do_pack) {
3481                 if (atomic_read(&queue->used_buffers)
3482                     >= QETH_HIGH_WATERMARK_PACK){
3483                         /* switch non-PACKING -> PACKING */
3484                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3485                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3486                         queue->do_pack = 1;
3487                 }
3488         }
3489 }
3490
3491 /*
3492  * Switches from packing to non-packing mode. If there is a packing
3493  * buffer on the queue this buffer will be prepared to be flushed.
3494  * In that case 1 is returned to inform the caller. If no buffer
3495  * has to be flushed, zero is returned.
3496  */
3497 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3498 {
3499         if (queue->do_pack) {
3500                 if (atomic_read(&queue->used_buffers)
3501                     <= QETH_LOW_WATERMARK_PACK) {
3502                         /* switch PACKING -> non-PACKING */
3503                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3504                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3505                         queue->do_pack = 0;
3506                         return qeth_prep_flush_pack_buffer(queue);
3507                 }
3508         }
3509         return 0;
3510 }
3511
3512 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3513                                int count)
3514 {
3515         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3516         struct qeth_card *card = queue->card;
3517         unsigned int frames, usecs;
3518         struct qaob *aob = NULL;
3519         int rc;
3520         int i;
3521
3522         for (i = index; i < index + count; ++i) {
3523                 unsigned int bidx = QDIO_BUFNR(i);
3524                 struct sk_buff *skb;
3525
3526                 buf = queue->bufs[bidx];
3527                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3528                                 SBAL_EFLAGS_LAST_ENTRY;
3529                 queue->coalesced_frames += buf->frames;
3530
3531                 if (IS_IQD(card)) {
3532                         skb_queue_walk(&buf->skb_list, skb)
3533                                 skb_tx_timestamp(skb);
3534                 }
3535         }
3536
3537         if (IS_IQD(card)) {
3538                 if (card->options.cq == QETH_CQ_ENABLED &&
3539                     !qeth_iqd_is_mcast_queue(card, queue) &&
3540                     count == 1) {
3541                         if (!buf->aob)
3542                                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3543                                                              GFP_ATOMIC);
3544                         if (buf->aob) {
3545                                 struct qeth_qaob_priv1 *priv;
3546
3547                                 aob = buf->aob;
3548                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3549                                 priv->state = QETH_QAOB_ISSUED;
3550                                 priv->queue_no = queue->queue_no;
3551                         }
3552                 }
3553         } else {
3554                 if (!queue->do_pack) {
3555                         if ((atomic_read(&queue->used_buffers) >=
3556                                 (QETH_HIGH_WATERMARK_PACK -
3557                                  QETH_WATERMARK_PACK_FUZZ)) &&
3558                             !atomic_read(&queue->set_pci_flags_count)) {
3559                                 /* it's likely that we'll go to packing
3560                                  * mode soon */
3561                                 atomic_inc(&queue->set_pci_flags_count);
3562                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3563                         }
3564                 } else {
3565                         if (!atomic_read(&queue->set_pci_flags_count)) {
3566                                 /*
3567                                  * there's no outstanding PCI any more, so we
3568                                  * have to request a PCI to be sure the PCI
3569                                  * will wake at some time in the future then we
3570                                  * can flush packed buffers that might still be
3571                                  * hanging around, which can happen if no
3572                                  * further send was requested by the stack
3573                                  */
3574                                 atomic_inc(&queue->set_pci_flags_count);
3575                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3576                         }
3577                 }
3578         }
3579
3580         QETH_TXQ_STAT_INC(queue, doorbell);
3581         rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3582                                            index, count, aob);
3583
3584         switch (rc) {
3585         case 0:
3586         case -ENOBUFS:
3587                 /* ignore temporary SIGA errors without busy condition */
3588
3589                 /* Fake the TX completion interrupt: */
3590                 frames = READ_ONCE(queue->max_coalesced_frames);
3591                 usecs = READ_ONCE(queue->coalesce_usecs);
3592
3593                 if (frames && queue->coalesced_frames >= frames) {
3594                         napi_schedule(&queue->napi);
3595                         queue->coalesced_frames = 0;
3596                         QETH_TXQ_STAT_INC(queue, coal_frames);
3597                 } else if (qeth_use_tx_irqs(card) &&
3598                            atomic_read(&queue->used_buffers) >= 32) {
3599                         /* Old behaviour carried over from the qdio layer: */
3600                         napi_schedule(&queue->napi);
3601                         QETH_TXQ_STAT_INC(queue, coal_frames);
3602                 } else if (usecs) {
3603                         qeth_tx_arm_timer(queue, usecs);
3604                 }
3605
3606                 break;
3607         default:
3608                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3609                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3610                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3611                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3612                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3613
3614                 /* this must not happen under normal circumstances. if it
3615                  * happens something is really wrong -> recover */
3616                 qeth_schedule_recovery(queue->card);
3617         }
3618 }
3619
3620 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3621 {
3622         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3623
3624         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3625         queue->prev_hdr = NULL;
3626         queue->bulk_count = 0;
3627 }
3628
3629 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3630 {
3631         /*
3632          * check if weed have to switch to non-packing mode or if
3633          * we have to get a pci flag out on the queue
3634          */
3635         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3636             !atomic_read(&queue->set_pci_flags_count)) {
3637                 unsigned int index, flush_cnt;
3638
3639                 spin_lock(&queue->lock);
3640
3641                 index = queue->next_buf_to_fill;
3642
3643                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3644                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3645                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3646
3647                 if (flush_cnt) {
3648                         qeth_flush_buffers(queue, index, flush_cnt);
3649                         QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3650                 }
3651
3652                 spin_unlock(&queue->lock);
3653         }
3654 }
3655
3656 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3657 {
3658         struct qeth_card *card = (struct qeth_card *)card_ptr;
3659
3660         napi_schedule_irqoff(&card->napi);
3661 }
3662
3663 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3664 {
3665         int rc;
3666
3667         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3668                 rc = -1;
3669                 goto out;
3670         } else {
3671                 if (card->options.cq == cq) {
3672                         rc = 0;
3673                         goto out;
3674                 }
3675
3676                 qeth_free_qdio_queues(card);
3677                 card->options.cq = cq;
3678                 rc = 0;
3679         }
3680 out:
3681         return rc;
3682
3683 }
3684 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3685
3686 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3687 {
3688         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3689         unsigned int queue_no = priv->queue_no;
3690
3691         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3692
3693         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3694             queue_no < card->qdio.no_out_queues)
3695                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3696 }
3697
3698 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3699                                  unsigned int queue, int first_element,
3700                                  int count)
3701 {
3702         struct qeth_qdio_q *cq = card->qdio.c_q;
3703         int i;
3704         int rc;
3705
3706         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3707         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3708         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3709
3710         if (qdio_err) {
3711                 netif_tx_stop_all_queues(card->dev);
3712                 qeth_schedule_recovery(card);
3713                 return;
3714         }
3715
3716         for (i = first_element; i < first_element + count; ++i) {
3717                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3718                 int e = 0;
3719
3720                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3721                        buffer->element[e].addr) {
3722                         unsigned long phys_aob_addr = buffer->element[e].addr;
3723
3724                         qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3725                         ++e;
3726                 }
3727                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3728         }
3729         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3730                                           cq->next_buf_to_init, count);
3731         if (rc) {
3732                 dev_warn(&card->gdev->dev,
3733                         "QDIO reported an error, rc=%i\n", rc);
3734                 QETH_CARD_TEXT(card, 2, "qcqherr");
3735         }
3736
3737         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3738 }
3739
3740 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3741                                     unsigned int qdio_err, int queue,
3742                                     int first_elem, int count,
3743                                     unsigned long card_ptr)
3744 {
3745         struct qeth_card *card = (struct qeth_card *)card_ptr;
3746
3747         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3748         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3749
3750         if (qdio_err)
3751                 qeth_schedule_recovery(card);
3752 }
3753
3754 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3755                                      unsigned int qdio_error, int __queue,
3756                                      int first_element, int count,
3757                                      unsigned long card_ptr)
3758 {
3759         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3760
3761         QETH_CARD_TEXT(card, 2, "achkcond");
3762         netif_tx_stop_all_queues(card->dev);
3763         qeth_schedule_recovery(card);
3764 }
3765
3766 /*
3767  * Note: Function assumes that we have 4 outbound queues.
3768  */
3769 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3770 {
3771         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3772         u8 tos;
3773
3774         switch (card->qdio.do_prio_queueing) {
3775         case QETH_PRIO_Q_ING_TOS:
3776         case QETH_PRIO_Q_ING_PREC:
3777                 switch (vlan_get_protocol(skb)) {
3778                 case htons(ETH_P_IP):
3779                         tos = ipv4_get_dsfield(ip_hdr(skb));
3780                         break;
3781                 case htons(ETH_P_IPV6):
3782                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3783                         break;
3784                 default:
3785                         return card->qdio.default_out_queue;
3786                 }
3787                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3788                         return ~tos >> 6 & 3;
3789                 if (tos & IPTOS_MINCOST)
3790                         return 3;
3791                 if (tos & IPTOS_RELIABILITY)
3792                         return 2;
3793                 if (tos & IPTOS_THROUGHPUT)
3794                         return 1;
3795                 if (tos & IPTOS_LOWDELAY)
3796                         return 0;
3797                 break;
3798         case QETH_PRIO_Q_ING_SKB:
3799                 if (skb->priority > 5)
3800                         return 0;
3801                 return ~skb->priority >> 1 & 3;
3802         case QETH_PRIO_Q_ING_VLAN:
3803                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3804                         return ~ntohs(veth->h_vlan_TCI) >>
3805                                (VLAN_PRIO_SHIFT + 1) & 3;
3806                 break;
3807         case QETH_PRIO_Q_ING_FIXED:
3808                 return card->qdio.default_out_queue;
3809         default:
3810                 break;
3811         }
3812         return card->qdio.default_out_queue;
3813 }
3814
3815 /**
3816  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3817  * @skb:                                SKB address
3818  *
3819  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3820  * fragmented part of the SKB. Returns zero for linear SKB.
3821  */
3822 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3823 {
3824         int cnt, elements = 0;
3825
3826         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3827                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3828
3829                 elements += qeth_get_elements_for_range(
3830                         (addr_t)skb_frag_address(frag),
3831                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3832         }
3833         return elements;
3834 }
3835
3836 /**
3837  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3838  *                              to transmit an skb.
3839  * @skb:                        the skb to operate on.
3840  * @data_offset:                skip this part of the skb's linear data
3841  *
3842  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3843  * skb's data (both its linear part and paged fragments).
3844  */
3845 static unsigned int qeth_count_elements(struct sk_buff *skb,
3846                                         unsigned int data_offset)
3847 {
3848         unsigned int elements = qeth_get_elements_for_frags(skb);
3849         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3850         addr_t start = (addr_t)skb->data + data_offset;
3851
3852         if (start != end)
3853                 elements += qeth_get_elements_for_range(start, end);
3854         return elements;
3855 }
3856
3857 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3858                                          MAX_TCP_HEADER)
3859
3860 /**
3861  * qeth_add_hw_header() - add a HW header to an skb.
3862  * @queue: TX queue that the skb will be placed on.
3863  * @skb: skb that the HW header should be added to.
3864  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3865  *       it contains a valid pointer to a qeth_hdr.
3866  * @hdr_len: length of the HW header.
3867  * @proto_len: length of protocol headers that need to be in same page as the
3868  *             HW header.
3869  * @elements: returns the required number of buffer elements for this skb.
3870  *
3871  * Returns the pushed length. If the header can't be pushed on
3872  * (eg. because it would cross a page boundary), it is allocated from
3873  * the cache instead and 0 is returned.
3874  * The number of needed buffer elements is returned in @elements.
3875  * Error to create the hdr is indicated by returning with < 0.
3876  */
3877 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3878                               struct sk_buff *skb, struct qeth_hdr **hdr,
3879                               unsigned int hdr_len, unsigned int proto_len,
3880                               unsigned int *elements)
3881 {
3882         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3883         const unsigned int contiguous = proto_len ? proto_len : 1;
3884         const unsigned int max_elements = queue->max_elements;
3885         unsigned int __elements;
3886         addr_t start, end;
3887         bool push_ok;
3888         int rc;
3889
3890 check_layout:
3891         start = (addr_t)skb->data - hdr_len;
3892         end = (addr_t)skb->data;
3893
3894         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3895                 /* Push HW header into same page as first protocol header. */
3896                 push_ok = true;
3897                 /* ... but TSO always needs a separate element for headers: */
3898                 if (skb_is_gso(skb))
3899                         __elements = 1 + qeth_count_elements(skb, proto_len);
3900                 else
3901                         __elements = qeth_count_elements(skb, 0);
3902         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3903                 /* Push HW header into preceding page, flush with skb->data. */
3904                 push_ok = true;
3905                 __elements = 1 + qeth_count_elements(skb, 0);
3906         } else {
3907                 /* Use header cache, copy protocol headers up. */
3908                 push_ok = false;
3909                 __elements = 1 + qeth_count_elements(skb, proto_len);
3910         }
3911
3912         /* Compress skb to fit into one IO buffer: */
3913         if (__elements > max_elements) {
3914                 if (!skb_is_nonlinear(skb)) {
3915                         /* Drop it, no easy way of shrinking it further. */
3916                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3917                                          max_elements, __elements, skb->len);
3918                         return -E2BIG;
3919                 }
3920
3921                 rc = skb_linearize(skb);
3922                 if (rc) {
3923                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3924                         return rc;
3925                 }
3926
3927                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3928                 /* Linearization changed the layout, re-evaluate: */
3929                 goto check_layout;
3930         }
3931
3932         *elements = __elements;
3933         /* Add the header: */
3934         if (push_ok) {
3935                 *hdr = skb_push(skb, hdr_len);
3936                 return hdr_len;
3937         }
3938
3939         /* Fall back to cache element with known-good alignment: */
3940         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3941                 return -E2BIG;
3942         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3943         if (!*hdr)
3944                 return -ENOMEM;
3945         /* Copy protocol headers behind HW header: */
3946         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3947         return 0;
3948 }
3949
3950 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3951                               struct sk_buff *curr_skb,
3952                               struct qeth_hdr *curr_hdr)
3953 {
3954         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3955         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3956
3957         if (!prev_hdr)
3958                 return true;
3959
3960         /* All packets must have the same target: */
3961         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3962                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3963
3964                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3965                                         eth_hdr(curr_skb)->h_dest) &&
3966                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3967         }
3968
3969         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3970                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3971 }
3972
3973 /**
3974  * qeth_fill_buffer() - map skb into an output buffer
3975  * @buf:        buffer to transport the skb
3976  * @skb:        skb to map into the buffer
3977  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3978  *              from qeth_core_header_cache.
3979  * @offset:     when mapping the skb, start at skb->data + offset
3980  * @hd_len:     if > 0, build a dedicated header element of this size
3981  */
3982 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3983                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3984                                      unsigned int offset, unsigned int hd_len)
3985 {
3986         struct qdio_buffer *buffer = buf->buffer;
3987         int element = buf->next_element_to_fill;
3988         int length = skb_headlen(skb) - offset;
3989         char *data = skb->data + offset;
3990         unsigned int elem_length, cnt;
3991         bool is_first_elem = true;
3992
3993         __skb_queue_tail(&buf->skb_list, skb);
3994
3995         /* build dedicated element for HW Header */
3996         if (hd_len) {
3997                 is_first_elem = false;
3998
3999                 buffer->element[element].addr = virt_to_phys(hdr);
4000                 buffer->element[element].length = hd_len;
4001                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4002
4003                 /* HW header is allocated from cache: */
4004                 if ((void *)hdr != skb->data)
4005                         __set_bit(element, buf->from_kmem_cache);
4006                 /* HW header was pushed and is contiguous with linear part: */
4007                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4008                          (data == (char *)hdr + hd_len))
4009                         buffer->element[element].eflags |=
4010                                 SBAL_EFLAGS_CONTIGUOUS;
4011
4012                 element++;
4013         }
4014
4015         /* map linear part into buffer element(s) */
4016         while (length > 0) {
4017                 elem_length = min_t(unsigned int, length,
4018                                     PAGE_SIZE - offset_in_page(data));
4019
4020                 buffer->element[element].addr = virt_to_phys(data);
4021                 buffer->element[element].length = elem_length;
4022                 length -= elem_length;
4023                 if (is_first_elem) {
4024                         is_first_elem = false;
4025                         if (length || skb_is_nonlinear(skb))
4026                                 /* skb needs additional elements */
4027                                 buffer->element[element].eflags =
4028                                         SBAL_EFLAGS_FIRST_FRAG;
4029                         else
4030                                 buffer->element[element].eflags = 0;
4031                 } else {
4032                         buffer->element[element].eflags =
4033                                 SBAL_EFLAGS_MIDDLE_FRAG;
4034                 }
4035
4036                 data += elem_length;
4037                 element++;
4038         }
4039
4040         /* map page frags into buffer element(s) */
4041         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4042                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4043
4044                 data = skb_frag_address(frag);
4045                 length = skb_frag_size(frag);
4046                 while (length > 0) {
4047                         elem_length = min_t(unsigned int, length,
4048                                             PAGE_SIZE - offset_in_page(data));
4049
4050                         buffer->element[element].addr = virt_to_phys(data);
4051                         buffer->element[element].length = elem_length;
4052                         buffer->element[element].eflags =
4053                                 SBAL_EFLAGS_MIDDLE_FRAG;
4054
4055                         length -= elem_length;
4056                         data += elem_length;
4057                         element++;
4058                 }
4059         }
4060
4061         if (buffer->element[element - 1].eflags)
4062                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4063         buf->next_element_to_fill = element;
4064         return element;
4065 }
4066
4067 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4068                        struct sk_buff *skb, unsigned int elements,
4069                        struct qeth_hdr *hdr, unsigned int offset,
4070                        unsigned int hd_len)
4071 {
4072         unsigned int bytes = qdisc_pkt_len(skb);
4073         struct qeth_qdio_out_buffer *buffer;
4074         unsigned int next_element;
4075         struct netdev_queue *txq;
4076         bool stopped = false;
4077         bool flush;
4078
4079         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4080         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4081
4082         /* Just a sanity check, the wake/stop logic should ensure that we always
4083          * get a free buffer.
4084          */
4085         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4086                 return -EBUSY;
4087
4088         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4089
4090         if (flush ||
4091             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4092                 if (buffer->next_element_to_fill > 0) {
4093                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4094                         queue->bulk_count++;
4095                 }
4096
4097                 if (queue->bulk_count >= queue->bulk_max)
4098                         flush = true;
4099
4100                 if (flush)
4101                         qeth_flush_queue(queue);
4102
4103                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4104                                                 queue->bulk_count)];
4105
4106                 /* Sanity-check again: */
4107                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4108                         return -EBUSY;
4109         }
4110
4111         if (buffer->next_element_to_fill == 0 &&
4112             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4113                 /* If a TX completion happens right _here_ and misses to wake
4114                  * the txq, then our re-check below will catch the race.
4115                  */
4116                 QETH_TXQ_STAT_INC(queue, stopped);
4117                 netif_tx_stop_queue(txq);
4118                 stopped = true;
4119         }
4120
4121         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4122         buffer->bytes += bytes;
4123         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4124         queue->prev_hdr = hdr;
4125
4126         flush = __netdev_tx_sent_queue(txq, bytes,
4127                                        !stopped && netdev_xmit_more());
4128
4129         if (flush || next_element >= queue->max_elements) {
4130                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4131                 queue->bulk_count++;
4132
4133                 if (queue->bulk_count >= queue->bulk_max)
4134                         flush = true;
4135
4136                 if (flush)
4137                         qeth_flush_queue(queue);
4138         }
4139
4140         if (stopped && !qeth_out_queue_is_full(queue))
4141                 netif_tx_start_queue(txq);
4142         return 0;
4143 }
4144
4145 static int qeth_do_send_packet(struct qeth_card *card,
4146                                struct qeth_qdio_out_q *queue,
4147                                struct sk_buff *skb, struct qeth_hdr *hdr,
4148                                unsigned int offset, unsigned int hd_len,
4149                                unsigned int elements_needed)
4150 {
4151         unsigned int start_index = queue->next_buf_to_fill;
4152         struct qeth_qdio_out_buffer *buffer;
4153         unsigned int next_element;
4154         struct netdev_queue *txq;
4155         bool stopped = false;
4156         int flush_count = 0;
4157         int do_pack = 0;
4158         int rc = 0;
4159
4160         buffer = queue->bufs[queue->next_buf_to_fill];
4161
4162         /* Just a sanity check, the wake/stop logic should ensure that we always
4163          * get a free buffer.
4164          */
4165         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4166                 return -EBUSY;
4167
4168         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4169
4170         /* check if we need to switch packing state of this queue */
4171         qeth_switch_to_packing_if_needed(queue);
4172         if (queue->do_pack) {
4173                 do_pack = 1;
4174                 /* does packet fit in current buffer? */
4175                 if (buffer->next_element_to_fill + elements_needed >
4176                     queue->max_elements) {
4177                         /* ... no -> set state PRIMED */
4178                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4179                         flush_count++;
4180                         queue->next_buf_to_fill =
4181                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4182                         buffer = queue->bufs[queue->next_buf_to_fill];
4183
4184                         /* We stepped forward, so sanity-check again: */
4185                         if (atomic_read(&buffer->state) !=
4186                             QETH_QDIO_BUF_EMPTY) {
4187                                 qeth_flush_buffers(queue, start_index,
4188                                                            flush_count);
4189                                 rc = -EBUSY;
4190                                 goto out;
4191                         }
4192                 }
4193         }
4194
4195         if (buffer->next_element_to_fill == 0 &&
4196             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4197                 /* If a TX completion happens right _here_ and misses to wake
4198                  * the txq, then our re-check below will catch the race.
4199                  */
4200                 QETH_TXQ_STAT_INC(queue, stopped);
4201                 netif_tx_stop_queue(txq);
4202                 stopped = true;
4203         }
4204
4205         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4206         buffer->bytes += qdisc_pkt_len(skb);
4207         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4208
4209         if (queue->do_pack)
4210                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4211         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4212                 flush_count++;
4213                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4214                 queue->next_buf_to_fill =
4215                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4216         }
4217
4218         if (flush_count)
4219                 qeth_flush_buffers(queue, start_index, flush_count);
4220
4221 out:
4222         if (do_pack)
4223                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4224
4225         if (stopped && !qeth_out_queue_is_full(queue))
4226                 netif_tx_start_queue(txq);
4227         return rc;
4228 }
4229
4230 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4231                               unsigned int payload_len, struct sk_buff *skb,
4232                               unsigned int proto_len)
4233 {
4234         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4235
4236         ext->hdr_tot_len = sizeof(*ext);
4237         ext->imb_hdr_no = 1;
4238         ext->hdr_type = 1;
4239         ext->hdr_version = 1;
4240         ext->hdr_len = 28;
4241         ext->payload_len = payload_len;
4242         ext->mss = skb_shinfo(skb)->gso_size;
4243         ext->dg_hdr_len = proto_len;
4244 }
4245
4246 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4247               struct qeth_qdio_out_q *queue, __be16 proto,
4248               void (*fill_header)(struct qeth_qdio_out_q *queue,
4249                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4250                                   __be16 proto, unsigned int data_len))
4251 {
4252         unsigned int proto_len, hw_hdr_len;
4253         unsigned int frame_len = skb->len;
4254         bool is_tso = skb_is_gso(skb);
4255         unsigned int data_offset = 0;
4256         struct qeth_hdr *hdr = NULL;
4257         unsigned int hd_len = 0;
4258         unsigned int elements;
4259         int push_len, rc;
4260
4261         if (is_tso) {
4262                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4263                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4264         } else {
4265                 hw_hdr_len = sizeof(struct qeth_hdr);
4266                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4267         }
4268
4269         rc = skb_cow_head(skb, hw_hdr_len);
4270         if (rc)
4271                 return rc;
4272
4273         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4274                                       &elements);
4275         if (push_len < 0)
4276                 return push_len;
4277         if (is_tso || !push_len) {
4278                 /* HW header needs its own buffer element. */
4279                 hd_len = hw_hdr_len + proto_len;
4280                 data_offset = push_len + proto_len;
4281         }
4282         memset(hdr, 0, hw_hdr_len);
4283         fill_header(queue, hdr, skb, proto, frame_len);
4284         if (is_tso)
4285                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4286                                   frame_len - proto_len, skb, proto_len);
4287
4288         if (IS_IQD(card)) {
4289                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4290                                  hd_len);
4291         } else {
4292                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4293                 skb_orphan(skb);
4294                 spin_lock(&queue->lock);
4295                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4296                                          hd_len, elements);
4297                 spin_unlock(&queue->lock);
4298         }
4299
4300         if (rc && !push_len)
4301                 kmem_cache_free(qeth_core_header_cache, hdr);
4302
4303         return rc;
4304 }
4305 EXPORT_SYMBOL_GPL(qeth_xmit);
4306
4307 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4308                 struct qeth_reply *reply, unsigned long data)
4309 {
4310         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4311         struct qeth_ipacmd_setadpparms *setparms;
4312
4313         QETH_CARD_TEXT(card, 4, "prmadpcb");
4314
4315         setparms = &(cmd->data.setadapterparms);
4316         if (qeth_setadpparms_inspect_rc(cmd)) {
4317                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4318                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4319         }
4320         card->info.promisc_mode = setparms->data.mode;
4321         return (cmd->hdr.return_code) ? -EIO : 0;
4322 }
4323
4324 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4325 {
4326         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4327                                                     SET_PROMISC_MODE_OFF;
4328         struct qeth_cmd_buffer *iob;
4329         struct qeth_ipa_cmd *cmd;
4330
4331         QETH_CARD_TEXT(card, 4, "setprom");
4332         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4333
4334         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4335                                    SETADP_DATA_SIZEOF(mode));
4336         if (!iob)
4337                 return;
4338         cmd = __ipa_cmd(iob);
4339         cmd->data.setadapterparms.data.mode = mode;
4340         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4341 }
4342 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4343
4344 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4345                 struct qeth_reply *reply, unsigned long data)
4346 {
4347         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4348         struct qeth_ipacmd_setadpparms *adp_cmd;
4349
4350         QETH_CARD_TEXT(card, 4, "chgmaccb");
4351         if (qeth_setadpparms_inspect_rc(cmd))
4352                 return -EIO;
4353
4354         adp_cmd = &cmd->data.setadapterparms;
4355         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4356                 return -EADDRNOTAVAIL;
4357
4358         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4359             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4360                 return -EADDRNOTAVAIL;
4361
4362         eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4363         return 0;
4364 }
4365
4366 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4367 {
4368         int rc;
4369         struct qeth_cmd_buffer *iob;
4370         struct qeth_ipa_cmd *cmd;
4371
4372         QETH_CARD_TEXT(card, 4, "chgmac");
4373
4374         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4375                                    SETADP_DATA_SIZEOF(change_addr));
4376         if (!iob)
4377                 return -ENOMEM;
4378         cmd = __ipa_cmd(iob);
4379         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4380         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4381         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4382                         card->dev->dev_addr);
4383         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4384                                NULL);
4385         return rc;
4386 }
4387 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4388
4389 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4390                 struct qeth_reply *reply, unsigned long data)
4391 {
4392         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4393         struct qeth_set_access_ctrl *access_ctrl_req;
4394
4395         QETH_CARD_TEXT(card, 4, "setaccb");
4396
4397         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4398         QETH_CARD_TEXT_(card, 2, "rc=%d",
4399                         cmd->data.setadapterparms.hdr.return_code);
4400         if (cmd->data.setadapterparms.hdr.return_code !=
4401                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4402                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4403                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4404                                  cmd->data.setadapterparms.hdr.return_code);
4405         switch (qeth_setadpparms_inspect_rc(cmd)) {
4406         case SET_ACCESS_CTRL_RC_SUCCESS:
4407                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4408                         dev_info(&card->gdev->dev,
4409                             "QDIO data connection isolation is deactivated\n");
4410                 else
4411                         dev_info(&card->gdev->dev,
4412                             "QDIO data connection isolation is activated\n");
4413                 return 0;
4414         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4415                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4416                                  CARD_DEVID(card));
4417                 return 0;
4418         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4419                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4420                                  CARD_DEVID(card));
4421                 return 0;
4422         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4423                 dev_err(&card->gdev->dev, "Adapter does not "
4424                         "support QDIO data connection isolation\n");
4425                 return -EOPNOTSUPP;
4426         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4427                 dev_err(&card->gdev->dev,
4428                         "Adapter is dedicated. "
4429                         "QDIO data connection isolation not supported\n");
4430                 return -EOPNOTSUPP;
4431         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4432                 dev_err(&card->gdev->dev,
4433                         "TSO does not permit QDIO data connection isolation\n");
4434                 return -EPERM;
4435         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4436                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4437                         "support reflective relay mode\n");
4438                 return -EOPNOTSUPP;
4439         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4440                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4441                                         "enabled at the adjacent switch port");
4442                 return -EREMOTEIO;
4443         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4444                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4445                                         "at the adjacent switch failed\n");
4446                 /* benign error while disabling ISOLATION_MODE_FWD */
4447                 return 0;
4448         default:
4449                 return -EIO;
4450         }
4451 }
4452
4453 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4454                                      enum qeth_ipa_isolation_modes mode)
4455 {
4456         int rc;
4457         struct qeth_cmd_buffer *iob;
4458         struct qeth_ipa_cmd *cmd;
4459         struct qeth_set_access_ctrl *access_ctrl_req;
4460
4461         QETH_CARD_TEXT(card, 4, "setacctl");
4462
4463         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4464                 dev_err(&card->gdev->dev,
4465                         "Adapter does not support QDIO data connection isolation\n");
4466                 return -EOPNOTSUPP;
4467         }
4468
4469         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4470                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4471         if (!iob)
4472                 return -ENOMEM;
4473         cmd = __ipa_cmd(iob);
4474         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4475         access_ctrl_req->subcmd_code = mode;
4476
4477         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4478                                NULL);
4479         if (rc) {
4480                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4481                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4482                                  rc, CARD_DEVID(card));
4483         }
4484
4485         return rc;
4486 }
4487
4488 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4489 {
4490         struct qeth_card *card;
4491
4492         card = dev->ml_priv;
4493         QETH_CARD_TEXT(card, 4, "txtimeo");
4494         qeth_schedule_recovery(card);
4495 }
4496 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4497
4498 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4499 {
4500         struct qeth_card *card = dev->ml_priv;
4501         int rc = 0;
4502
4503         switch (regnum) {
4504         case MII_BMCR: /* Basic mode control register */
4505                 rc = BMCR_FULLDPLX;
4506                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4507                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4508                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4509                         rc |= BMCR_SPEED100;
4510                 break;
4511         case MII_BMSR: /* Basic mode status register */
4512                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4513                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4514                      BMSR_100BASE4;
4515                 break;
4516         case MII_PHYSID1: /* PHYS ID 1 */
4517                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4518                      dev->dev_addr[2];
4519                 rc = (rc >> 5) & 0xFFFF;
4520                 break;
4521         case MII_PHYSID2: /* PHYS ID 2 */
4522                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4523                 break;
4524         case MII_ADVERTISE: /* Advertisement control reg */
4525                 rc = ADVERTISE_ALL;
4526                 break;
4527         case MII_LPA: /* Link partner ability reg */
4528                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4529                      LPA_100BASE4 | LPA_LPACK;
4530                 break;
4531         case MII_EXPANSION: /* Expansion register */
4532                 break;
4533         case MII_DCOUNTER: /* disconnect counter */
4534                 break;
4535         case MII_FCSCOUNTER: /* false carrier counter */
4536                 break;
4537         case MII_NWAYTEST: /* N-way auto-neg test register */
4538                 break;
4539         case MII_RERRCOUNTER: /* rx error counter */
4540                 rc = card->stats.rx_length_errors +
4541                      card->stats.rx_frame_errors +
4542                      card->stats.rx_fifo_errors;
4543                 break;
4544         case MII_SREVISION: /* silicon revision */
4545                 break;
4546         case MII_RESV1: /* reserved 1 */
4547                 break;
4548         case MII_LBRERROR: /* loopback, rx, bypass error */
4549                 break;
4550         case MII_PHYADDR: /* physical address */
4551                 break;
4552         case MII_RESV2: /* reserved 2 */
4553                 break;
4554         case MII_TPISTATUS: /* TPI status for 10mbps */
4555                 break;
4556         case MII_NCONFIG: /* network interface config */
4557                 break;
4558         default:
4559                 break;
4560         }
4561         return rc;
4562 }
4563
4564 static int qeth_snmp_command_cb(struct qeth_card *card,
4565                                 struct qeth_reply *reply, unsigned long data)
4566 {
4567         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4568         struct qeth_arp_query_info *qinfo = reply->param;
4569         struct qeth_ipacmd_setadpparms *adp_cmd;
4570         unsigned int data_len;
4571         void *snmp_data;
4572
4573         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4574
4575         if (cmd->hdr.return_code) {
4576                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4577                 return -EIO;
4578         }
4579         if (cmd->data.setadapterparms.hdr.return_code) {
4580                 cmd->hdr.return_code =
4581                         cmd->data.setadapterparms.hdr.return_code;
4582                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4583                 return -EIO;
4584         }
4585
4586         adp_cmd = &cmd->data.setadapterparms;
4587         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4588         if (adp_cmd->hdr.seq_no == 1) {
4589                 snmp_data = &adp_cmd->data.snmp;
4590         } else {
4591                 snmp_data = &adp_cmd->data.snmp.request;
4592                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4593         }
4594
4595         /* check if there is enough room in userspace */
4596         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4597                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4598                 return -ENOSPC;
4599         }
4600         QETH_CARD_TEXT_(card, 4, "snore%i",
4601                         cmd->data.setadapterparms.hdr.used_total);
4602         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4603                         cmd->data.setadapterparms.hdr.seq_no);
4604         /*copy entries to user buffer*/
4605         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4606         qinfo->udata_offset += data_len;
4607
4608         if (cmd->data.setadapterparms.hdr.seq_no <
4609             cmd->data.setadapterparms.hdr.used_total)
4610                 return 1;
4611         return 0;
4612 }
4613
4614 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4615 {
4616         struct qeth_snmp_ureq __user *ureq;
4617         struct qeth_cmd_buffer *iob;
4618         unsigned int req_len;
4619         struct qeth_arp_query_info qinfo = {0, };
4620         int rc = 0;
4621
4622         QETH_CARD_TEXT(card, 3, "snmpcmd");
4623
4624         if (IS_VM_NIC(card))
4625                 return -EOPNOTSUPP;
4626
4627         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4628             IS_LAYER3(card))
4629                 return -EOPNOTSUPP;
4630
4631         ureq = (struct qeth_snmp_ureq __user *) udata;
4632         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4633             get_user(req_len, &ureq->hdr.req_len))
4634                 return -EFAULT;
4635
4636         /* Sanitize user input, to avoid overflows in iob size calculation: */
4637         if (req_len > QETH_BUFSIZE)
4638                 return -EINVAL;
4639
4640         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4641         if (!iob)
4642                 return -ENOMEM;
4643
4644         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4645                            &ureq->cmd, req_len)) {
4646                 qeth_put_cmd(iob);
4647                 return -EFAULT;
4648         }
4649
4650         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4651         if (!qinfo.udata) {
4652                 qeth_put_cmd(iob);
4653                 return -ENOMEM;
4654         }
4655         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4656
4657         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4658         if (rc)
4659                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4660                                  CARD_DEVID(card), rc);
4661         else {
4662                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4663                         rc = -EFAULT;
4664         }
4665
4666         kfree(qinfo.udata);
4667         return rc;
4668 }
4669
4670 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4671                                          struct qeth_reply *reply,
4672                                          unsigned long data)
4673 {
4674         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4675         struct qeth_qoat_priv *priv = reply->param;
4676         int resdatalen;
4677
4678         QETH_CARD_TEXT(card, 3, "qoatcb");
4679         if (qeth_setadpparms_inspect_rc(cmd))
4680                 return -EIO;
4681
4682         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4683
4684         if (resdatalen > (priv->buffer_len - priv->response_len))
4685                 return -ENOSPC;
4686
4687         memcpy(priv->buffer + priv->response_len,
4688                &cmd->data.setadapterparms.hdr, resdatalen);
4689         priv->response_len += resdatalen;
4690
4691         if (cmd->data.setadapterparms.hdr.seq_no <
4692             cmd->data.setadapterparms.hdr.used_total)
4693                 return 1;
4694         return 0;
4695 }
4696
4697 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4698 {
4699         int rc = 0;
4700         struct qeth_cmd_buffer *iob;
4701         struct qeth_ipa_cmd *cmd;
4702         struct qeth_query_oat *oat_req;
4703         struct qeth_query_oat_data oat_data;
4704         struct qeth_qoat_priv priv;
4705         void __user *tmp;
4706
4707         QETH_CARD_TEXT(card, 3, "qoatcmd");
4708
4709         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4710                 return -EOPNOTSUPP;
4711
4712         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4713                 return -EFAULT;
4714
4715         priv.buffer_len = oat_data.buffer_len;
4716         priv.response_len = 0;
4717         priv.buffer = vzalloc(oat_data.buffer_len);
4718         if (!priv.buffer)
4719                 return -ENOMEM;
4720
4721         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4722                                    SETADP_DATA_SIZEOF(query_oat));
4723         if (!iob) {
4724                 rc = -ENOMEM;
4725                 goto out_free;
4726         }
4727         cmd = __ipa_cmd(iob);
4728         oat_req = &cmd->data.setadapterparms.data.query_oat;
4729         oat_req->subcmd_code = oat_data.command;
4730
4731         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4732         if (!rc) {
4733                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4734                                          u64_to_user_ptr(oat_data.ptr);
4735                 oat_data.response_len = priv.response_len;
4736
4737                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4738                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4739                         rc = -EFAULT;
4740         }
4741
4742 out_free:
4743         vfree(priv.buffer);
4744         return rc;
4745 }
4746
4747 static int qeth_query_card_info_cb(struct qeth_card *card,
4748                                    struct qeth_reply *reply, unsigned long data)
4749 {
4750         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4751         struct qeth_link_info *link_info = reply->param;
4752         struct qeth_query_card_info *card_info;
4753
4754         QETH_CARD_TEXT(card, 2, "qcrdincb");
4755         if (qeth_setadpparms_inspect_rc(cmd))
4756                 return -EIO;
4757
4758         card_info = &cmd->data.setadapterparms.data.card_info;
4759         netdev_dbg(card->dev,
4760                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4761                    card_info->card_type, card_info->port_mode,
4762                    card_info->port_speed);
4763
4764         switch (card_info->port_mode) {
4765         case CARD_INFO_PORTM_FULLDUPLEX:
4766                 link_info->duplex = DUPLEX_FULL;
4767                 break;
4768         case CARD_INFO_PORTM_HALFDUPLEX:
4769                 link_info->duplex = DUPLEX_HALF;
4770                 break;
4771         default:
4772                 link_info->duplex = DUPLEX_UNKNOWN;
4773         }
4774
4775         switch (card_info->card_type) {
4776         case CARD_INFO_TYPE_1G_COPPER_A:
4777         case CARD_INFO_TYPE_1G_COPPER_B:
4778                 link_info->speed = SPEED_1000;
4779                 link_info->port = PORT_TP;
4780                 break;
4781         case CARD_INFO_TYPE_1G_FIBRE_A:
4782         case CARD_INFO_TYPE_1G_FIBRE_B:
4783                 link_info->speed = SPEED_1000;
4784                 link_info->port = PORT_FIBRE;
4785                 break;
4786         case CARD_INFO_TYPE_10G_FIBRE_A:
4787         case CARD_INFO_TYPE_10G_FIBRE_B:
4788                 link_info->speed = SPEED_10000;
4789                 link_info->port = PORT_FIBRE;
4790                 break;
4791         default:
4792                 switch (card_info->port_speed) {
4793                 case CARD_INFO_PORTS_10M:
4794                         link_info->speed = SPEED_10;
4795                         break;
4796                 case CARD_INFO_PORTS_100M:
4797                         link_info->speed = SPEED_100;
4798                         break;
4799                 case CARD_INFO_PORTS_1G:
4800                         link_info->speed = SPEED_1000;
4801                         break;
4802                 case CARD_INFO_PORTS_10G:
4803                         link_info->speed = SPEED_10000;
4804                         break;
4805                 case CARD_INFO_PORTS_25G:
4806                         link_info->speed = SPEED_25000;
4807                         break;
4808                 default:
4809                         link_info->speed = SPEED_UNKNOWN;
4810                 }
4811
4812                 link_info->port = PORT_OTHER;
4813         }
4814
4815         return 0;
4816 }
4817
4818 int qeth_query_card_info(struct qeth_card *card,
4819                          struct qeth_link_info *link_info)
4820 {
4821         struct qeth_cmd_buffer *iob;
4822
4823         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4824         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4825                 return -EOPNOTSUPP;
4826         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4827         if (!iob)
4828                 return -ENOMEM;
4829
4830         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4831 }
4832
4833 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4834                                       struct qeth_reply *reply_priv,
4835                                       unsigned long data)
4836 {
4837         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4838         struct qeth_link_info *link_info = reply_priv->param;
4839         struct qeth_query_oat_physical_if *phys_if;
4840         struct qeth_query_oat_reply *reply;
4841
4842         if (qeth_setadpparms_inspect_rc(cmd))
4843                 return -EIO;
4844
4845         /* Multi-part reply is unexpected, don't bother: */
4846         if (cmd->data.setadapterparms.hdr.used_total > 1)
4847                 return -EINVAL;
4848
4849         /* Expect the reply to start with phys_if data: */
4850         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4851         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4852             reply->length < sizeof(*reply))
4853                 return -EINVAL;
4854
4855         phys_if = &reply->phys_if;
4856
4857         switch (phys_if->speed_duplex) {
4858         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4859                 link_info->speed = SPEED_10;
4860                 link_info->duplex = DUPLEX_HALF;
4861                 break;
4862         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4863                 link_info->speed = SPEED_10;
4864                 link_info->duplex = DUPLEX_FULL;
4865                 break;
4866         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4867                 link_info->speed = SPEED_100;
4868                 link_info->duplex = DUPLEX_HALF;
4869                 break;
4870         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4871                 link_info->speed = SPEED_100;
4872                 link_info->duplex = DUPLEX_FULL;
4873                 break;
4874         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4875                 link_info->speed = SPEED_1000;
4876                 link_info->duplex = DUPLEX_HALF;
4877                 break;
4878         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4879                 link_info->speed = SPEED_1000;
4880                 link_info->duplex = DUPLEX_FULL;
4881                 break;
4882         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4883                 link_info->speed = SPEED_10000;
4884                 link_info->duplex = DUPLEX_FULL;
4885                 break;
4886         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4887                 link_info->speed = SPEED_25000;
4888                 link_info->duplex = DUPLEX_FULL;
4889                 break;
4890         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4891         default:
4892                 link_info->speed = SPEED_UNKNOWN;
4893                 link_info->duplex = DUPLEX_UNKNOWN;
4894                 break;
4895         }
4896
4897         switch (phys_if->media_type) {
4898         case QETH_QOAT_PHYS_MEDIA_COPPER:
4899                 link_info->port = PORT_TP;
4900                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4901                 break;
4902         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4903                 link_info->port = PORT_FIBRE;
4904                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4905                 break;
4906         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4907                 link_info->port = PORT_FIBRE;
4908                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4909                 break;
4910         default:
4911                 link_info->port = PORT_OTHER;
4912                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4913                 break;
4914         }
4915
4916         return 0;
4917 }
4918
4919 static void qeth_init_link_info(struct qeth_card *card)
4920 {
4921         card->info.link_info.duplex = DUPLEX_FULL;
4922
4923         if (IS_IQD(card) || IS_VM_NIC(card)) {
4924                 card->info.link_info.speed = SPEED_10000;
4925                 card->info.link_info.port = PORT_FIBRE;
4926                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4927         } else {
4928                 switch (card->info.link_type) {
4929                 case QETH_LINK_TYPE_FAST_ETH:
4930                 case QETH_LINK_TYPE_LANE_ETH100:
4931                         card->info.link_info.speed = SPEED_100;
4932                         card->info.link_info.port = PORT_TP;
4933                         break;
4934                 case QETH_LINK_TYPE_GBIT_ETH:
4935                 case QETH_LINK_TYPE_LANE_ETH1000:
4936                         card->info.link_info.speed = SPEED_1000;
4937                         card->info.link_info.port = PORT_FIBRE;
4938                         break;
4939                 case QETH_LINK_TYPE_10GBIT_ETH:
4940                         card->info.link_info.speed = SPEED_10000;
4941                         card->info.link_info.port = PORT_FIBRE;
4942                         break;
4943                 case QETH_LINK_TYPE_25GBIT_ETH:
4944                         card->info.link_info.speed = SPEED_25000;
4945                         card->info.link_info.port = PORT_FIBRE;
4946                         break;
4947                 default:
4948                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
4949                                  card->info.link_type);
4950                         card->info.link_info.speed = SPEED_UNKNOWN;
4951                         card->info.link_info.port = PORT_OTHER;
4952                 }
4953
4954                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
4955         }
4956
4957         /* Get more accurate data via QUERY OAT: */
4958         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4959                 struct qeth_link_info link_info;
4960                 struct qeth_cmd_buffer *iob;
4961
4962                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4963                                            SETADP_DATA_SIZEOF(query_oat));
4964                 if (iob) {
4965                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4966                         struct qeth_query_oat *oat_req;
4967
4968                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4969                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4970
4971                         if (!qeth_send_ipa_cmd(card, iob,
4972                                                qeth_init_link_info_oat_cb,
4973                                                &link_info)) {
4974                                 if (link_info.speed != SPEED_UNKNOWN)
4975                                         card->info.link_info.speed = link_info.speed;
4976                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4977                                         card->info.link_info.duplex = link_info.duplex;
4978                                 if (link_info.port != PORT_OTHER)
4979                                         card->info.link_info.port = link_info.port;
4980                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4981                                         card->info.link_info.link_mode = link_info.link_mode;
4982                         }
4983                 }
4984         }
4985 }
4986
4987 /**
4988  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4989  * @card: pointer to a qeth_card
4990  *
4991  * Returns
4992  *      0, if a MAC address has been set for the card's netdevice
4993  *      a return code, for various error conditions
4994  */
4995 int qeth_vm_request_mac(struct qeth_card *card)
4996 {
4997         struct diag26c_mac_resp *response;
4998         struct diag26c_mac_req *request;
4999         int rc;
5000
5001         QETH_CARD_TEXT(card, 2, "vmreqmac");
5002
5003         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5004         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5005         if (!request || !response) {
5006                 rc = -ENOMEM;
5007                 goto out;
5008         }
5009
5010         request->resp_buf_len = sizeof(*response);
5011         request->resp_version = DIAG26C_VERSION2;
5012         request->op_code = DIAG26C_GET_MAC;
5013         request->devno = card->info.ddev_devno;
5014
5015         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5016         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5017         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5018         if (rc)
5019                 goto out;
5020         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5021
5022         if (request->resp_buf_len < sizeof(*response) ||
5023             response->version != request->resp_version) {
5024                 rc = -EIO;
5025                 QETH_CARD_TEXT(card, 2, "badresp");
5026                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5027                               sizeof(request->resp_buf_len));
5028         } else if (!is_valid_ether_addr(response->mac)) {
5029                 rc = -EINVAL;
5030                 QETH_CARD_TEXT(card, 2, "badmac");
5031                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5032         } else {
5033                 eth_hw_addr_set(card->dev, response->mac);
5034         }
5035
5036 out:
5037         kfree(response);
5038         kfree(request);
5039         return rc;
5040 }
5041 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5042
5043 static void qeth_determine_capabilities(struct qeth_card *card)
5044 {
5045         struct qeth_channel *channel = &card->data;
5046         struct ccw_device *ddev = channel->ccwdev;
5047         int rc;
5048         int ddev_offline = 0;
5049
5050         QETH_CARD_TEXT(card, 2, "detcapab");
5051         if (!ddev->online) {
5052                 ddev_offline = 1;
5053                 rc = qeth_start_channel(channel);
5054                 if (rc) {
5055                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5056                         goto out;
5057                 }
5058         }
5059
5060         rc = qeth_read_conf_data(card);
5061         if (rc) {
5062                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5063                                  CARD_DEVID(card), rc);
5064                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5065                 goto out_offline;
5066         }
5067
5068         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5069         if (rc)
5070                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5071
5072         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5073         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5074         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5075         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5076         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5077         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5078             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5079             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5080                 dev_info(&card->gdev->dev,
5081                         "Completion Queueing supported\n");
5082         } else {
5083                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5084         }
5085
5086 out_offline:
5087         if (ddev_offline == 1)
5088                 qeth_stop_channel(channel);
5089 out:
5090         return;
5091 }
5092
5093 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5094 {
5095         struct qeth_card_info *info = &card->info;
5096         struct ccw_device *cdev = CARD_DDEV(card);
5097         struct ccw_dev_id dev_id;
5098
5099         QETH_CARD_TEXT(card, 2, "ccwconfd");
5100         ccw_device_get_id(cdev, &dev_id);
5101
5102         info->ddev_devno = dev_id.devno;
5103         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5104                           !ccw_device_get_iid(cdev, &info->iid) &&
5105                           !ccw_device_get_chid(cdev, 0, &info->chid);
5106         info->ssid = dev_id.ssid;
5107
5108         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5109                  info->chid, info->chpid);
5110
5111         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5112         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5113         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5114         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5115         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5116         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5117         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5118 }
5119
5120 static int qeth_qdio_establish(struct qeth_card *card)
5121 {
5122         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5123         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5124         struct qeth_qib_parms *qib_parms = NULL;
5125         struct qdio_initialize init_data;
5126         unsigned int no_input_qs = 1;
5127         unsigned int i;
5128         int rc = 0;
5129
5130         QETH_CARD_TEXT(card, 2, "qdioest");
5131
5132         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5133                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5134                 if (!qib_parms)
5135                         return -ENOMEM;
5136
5137                 qeth_fill_qib_parms(card, qib_parms);
5138         }
5139
5140         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5141         if (card->options.cq == QETH_CQ_ENABLED) {
5142                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5143                 no_input_qs++;
5144         }
5145
5146         for (i = 0; i < card->qdio.no_out_queues; i++)
5147                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5148
5149         memset(&init_data, 0, sizeof(struct qdio_initialize));
5150         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5151                                                           QDIO_QETH_QFMT;
5152         init_data.qib_param_field_format = 0;
5153         init_data.qib_param_field        = (void *)qib_parms;
5154         init_data.no_input_qs            = no_input_qs;
5155         init_data.no_output_qs           = card->qdio.no_out_queues;
5156         init_data.input_handler          = qeth_qdio_input_handler;
5157         init_data.output_handler         = qeth_qdio_output_handler;
5158         init_data.irq_poll               = qeth_qdio_poll;
5159         init_data.int_parm               = (unsigned long) card;
5160         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5161         init_data.output_sbal_addr_array = out_sbal_ptrs;
5162
5163         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5164                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5165                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5166                                    init_data.no_output_qs);
5167                 if (rc) {
5168                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5169                         goto out;
5170                 }
5171                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5172                 if (rc) {
5173                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5174                         qdio_free(CARD_DDEV(card));
5175                 }
5176         }
5177
5178         switch (card->options.cq) {
5179         case QETH_CQ_ENABLED:
5180                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5181                 break;
5182         case QETH_CQ_DISABLED:
5183                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5184                 break;
5185         default:
5186                 break;
5187         }
5188
5189 out:
5190         kfree(qib_parms);
5191         return rc;
5192 }
5193
5194 static void qeth_core_free_card(struct qeth_card *card)
5195 {
5196         QETH_CARD_TEXT(card, 2, "freecrd");
5197
5198         unregister_service_level(&card->qeth_service_level);
5199         debugfs_remove_recursive(card->debugfs);
5200         qeth_put_cmd(card->read_cmd);
5201         destroy_workqueue(card->event_wq);
5202         dev_set_drvdata(&card->gdev->dev, NULL);
5203         kfree(card);
5204 }
5205
5206 static void qeth_trace_features(struct qeth_card *card)
5207 {
5208         QETH_CARD_TEXT(card, 2, "features");
5209         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5210         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5211         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5212         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5213                       sizeof(card->info.diagass_support));
5214 }
5215
5216 static struct ccw_device_id qeth_ids[] = {
5217         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5218                                         .driver_info = QETH_CARD_TYPE_OSD},
5219         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5220                                         .driver_info = QETH_CARD_TYPE_IQD},
5221         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5222                                         .driver_info = QETH_CARD_TYPE_OSM},
5223 #ifdef CONFIG_QETH_OSX
5224         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5225                                         .driver_info = QETH_CARD_TYPE_OSX},
5226 #endif
5227         {},
5228 };
5229 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5230
5231 static struct ccw_driver qeth_ccw_driver = {
5232         .driver = {
5233                 .owner = THIS_MODULE,
5234                 .name = "qeth",
5235         },
5236         .ids = qeth_ids,
5237         .probe = ccwgroup_probe_ccwdev,
5238         .remove = ccwgroup_remove_ccwdev,
5239 };
5240
5241 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5242 {
5243         int retries = 3;
5244         int rc;
5245
5246         QETH_CARD_TEXT(card, 2, "hrdsetup");
5247         atomic_set(&card->force_alloc_skb, 0);
5248         rc = qeth_update_from_chp_desc(card);
5249         if (rc)
5250                 return rc;
5251 retry:
5252         if (retries < 3)
5253                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5254                                  CARD_DEVID(card));
5255         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5256         qeth_stop_channel(&card->data);
5257         qeth_stop_channel(&card->write);
5258         qeth_stop_channel(&card->read);
5259         qdio_free(CARD_DDEV(card));
5260
5261         rc = qeth_start_channel(&card->read);
5262         if (rc)
5263                 goto retriable;
5264         rc = qeth_start_channel(&card->write);
5265         if (rc)
5266                 goto retriable;
5267         rc = qeth_start_channel(&card->data);
5268         if (rc)
5269                 goto retriable;
5270 retriable:
5271         if (rc == -ERESTARTSYS) {
5272                 QETH_CARD_TEXT(card, 2, "break1");
5273                 return rc;
5274         } else if (rc) {
5275                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5276                 if (--retries < 0)
5277                         goto out;
5278                 else
5279                         goto retry;
5280         }
5281
5282         qeth_determine_capabilities(card);
5283         qeth_read_ccw_conf_data(card);
5284         qeth_idx_init(card);
5285
5286         rc = qeth_idx_activate_read_channel(card);
5287         if (rc == -EINTR) {
5288                 QETH_CARD_TEXT(card, 2, "break2");
5289                 return rc;
5290         } else if (rc) {
5291                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5292                 if (--retries < 0)
5293                         goto out;
5294                 else
5295                         goto retry;
5296         }
5297
5298         rc = qeth_idx_activate_write_channel(card);
5299         if (rc == -EINTR) {
5300                 QETH_CARD_TEXT(card, 2, "break3");
5301                 return rc;
5302         } else if (rc) {
5303                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5304                 if (--retries < 0)
5305                         goto out;
5306                 else
5307                         goto retry;
5308         }
5309         card->read_or_write_problem = 0;
5310         rc = qeth_mpc_initialize(card);
5311         if (rc) {
5312                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5313                 goto out;
5314         }
5315
5316         rc = qeth_send_startlan(card);
5317         if (rc) {
5318                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5319                 if (rc == -ENETDOWN) {
5320                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5321                         *carrier_ok = false;
5322                 } else {
5323                         goto out;
5324                 }
5325         } else {
5326                 *carrier_ok = true;
5327         }
5328
5329         card->options.ipa4.supported = 0;
5330         card->options.ipa6.supported = 0;
5331         card->options.adp.supported = 0;
5332         card->options.sbp.supported_funcs = 0;
5333         card->info.diagass_support = 0;
5334         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5335         if (rc == -ENOMEM)
5336                 goto out;
5337         if (qeth_is_supported(card, IPA_IPV6)) {
5338                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5339                 if (rc == -ENOMEM)
5340                         goto out;
5341         }
5342         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5343                 rc = qeth_query_setadapterparms(card);
5344                 if (rc < 0) {
5345                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5346                         goto out;
5347                 }
5348         }
5349         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5350                 rc = qeth_query_setdiagass(card);
5351                 if (rc)
5352                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5353         }
5354
5355         qeth_trace_features(card);
5356
5357         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5358             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5359                 card->info.hwtrap = 0;
5360
5361         if (card->options.isolation != ISOLATION_MODE_NONE) {
5362                 rc = qeth_setadpparms_set_access_ctrl(card,
5363                                                       card->options.isolation);
5364                 if (rc)
5365                         goto out;
5366         }
5367
5368         qeth_init_link_info(card);
5369
5370         rc = qeth_init_qdio_queues(card);
5371         if (rc) {
5372                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5373                 goto out;
5374         }
5375
5376         return 0;
5377 out:
5378         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5379                 "an error on the device\n");
5380         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5381                          CARD_DEVID(card), rc);
5382         return rc;
5383 }
5384
5385 static int qeth_set_online(struct qeth_card *card,
5386                            const struct qeth_discipline *disc)
5387 {
5388         bool carrier_ok;
5389         int rc;
5390
5391         mutex_lock(&card->conf_mutex);
5392         QETH_CARD_TEXT(card, 2, "setonlin");
5393
5394         rc = qeth_hardsetup_card(card, &carrier_ok);
5395         if (rc) {
5396                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5397                 rc = -ENODEV;
5398                 goto err_hardsetup;
5399         }
5400
5401         qeth_print_status_message(card);
5402
5403         if (card->dev->reg_state != NETREG_REGISTERED)
5404                 /* no need for locking / error handling at this early stage: */
5405                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5406
5407         rc = disc->set_online(card, carrier_ok);
5408         if (rc)
5409                 goto err_online;
5410
5411         /* let user_space know that device is online */
5412         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5413
5414         mutex_unlock(&card->conf_mutex);
5415         return 0;
5416
5417 err_online:
5418 err_hardsetup:
5419         qeth_qdio_clear_card(card, 0);
5420         qeth_clear_working_pool_list(card);
5421         qeth_flush_local_addrs(card);
5422
5423         qeth_stop_channel(&card->data);
5424         qeth_stop_channel(&card->write);
5425         qeth_stop_channel(&card->read);
5426         qdio_free(CARD_DDEV(card));
5427
5428         mutex_unlock(&card->conf_mutex);
5429         return rc;
5430 }
5431
5432 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5433                      bool resetting)
5434 {
5435         int rc, rc2, rc3;
5436
5437         mutex_lock(&card->conf_mutex);
5438         QETH_CARD_TEXT(card, 3, "setoffl");
5439
5440         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5441                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5442                 card->info.hwtrap = 1;
5443         }
5444
5445         /* cancel any stalled cmd that might block the rtnl: */
5446         qeth_clear_ipacmd_list(card);
5447
5448         rtnl_lock();
5449         card->info.open_when_online = card->dev->flags & IFF_UP;
5450         dev_close(card->dev);
5451         netif_device_detach(card->dev);
5452         netif_carrier_off(card->dev);
5453         rtnl_unlock();
5454
5455         cancel_work_sync(&card->rx_mode_work);
5456
5457         disc->set_offline(card);
5458
5459         qeth_qdio_clear_card(card, 0);
5460         qeth_drain_output_queues(card);
5461         qeth_clear_working_pool_list(card);
5462         qeth_flush_local_addrs(card);
5463         card->info.promisc_mode = 0;
5464
5465         rc  = qeth_stop_channel(&card->data);
5466         rc2 = qeth_stop_channel(&card->write);
5467         rc3 = qeth_stop_channel(&card->read);
5468         if (!rc)
5469                 rc = (rc2) ? rc2 : rc3;
5470         if (rc)
5471                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5472         qdio_free(CARD_DDEV(card));
5473
5474         /* let user_space know that device is offline */
5475         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5476
5477         mutex_unlock(&card->conf_mutex);
5478         return 0;
5479 }
5480 EXPORT_SYMBOL_GPL(qeth_set_offline);
5481
5482 static int qeth_do_reset(void *data)
5483 {
5484         const struct qeth_discipline *disc;
5485         struct qeth_card *card = data;
5486         int rc;
5487
5488         /* Lock-free, other users will block until we are done. */
5489         disc = card->discipline;
5490
5491         QETH_CARD_TEXT(card, 2, "recover1");
5492         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5493                 return 0;
5494         QETH_CARD_TEXT(card, 2, "recover2");
5495         dev_warn(&card->gdev->dev,
5496                  "A recovery process has been started for the device\n");
5497
5498         qeth_set_offline(card, disc, true);
5499         rc = qeth_set_online(card, disc);
5500         if (!rc) {
5501                 dev_info(&card->gdev->dev,
5502                          "Device successfully recovered!\n");
5503         } else {
5504                 qeth_set_offline(card, disc, true);
5505                 ccwgroup_set_offline(card->gdev, false);
5506                 dev_warn(&card->gdev->dev,
5507                          "The qeth device driver failed to recover an error on the device\n");
5508         }
5509         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5510         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5511         return 0;
5512 }
5513
5514 #if IS_ENABLED(CONFIG_QETH_L3)
5515 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5516                                 struct qeth_hdr *hdr)
5517 {
5518         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5519         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5520         struct net_device *dev = skb->dev;
5521
5522         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5523                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5524                                 "FAKELL", skb->len);
5525                 return;
5526         }
5527
5528         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5529                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5530                                                              ETH_P_IP;
5531                 unsigned char tg_addr[ETH_ALEN];
5532
5533                 skb_reset_network_header(skb);
5534                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5535                 case QETH_CAST_MULTICAST:
5536                         if (prot == ETH_P_IP)
5537                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5538                         else
5539                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5540                         QETH_CARD_STAT_INC(card, rx_multicast);
5541                         break;
5542                 case QETH_CAST_BROADCAST:
5543                         ether_addr_copy(tg_addr, dev->broadcast);
5544                         QETH_CARD_STAT_INC(card, rx_multicast);
5545                         break;
5546                 default:
5547                         if (card->options.sniffer)
5548                                 skb->pkt_type = PACKET_OTHERHOST;
5549                         ether_addr_copy(tg_addr, dev->dev_addr);
5550                 }
5551
5552                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5553                         dev_hard_header(skb, dev, prot, tg_addr,
5554                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5555                 else
5556                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5557                                         skb->len);
5558         }
5559
5560         /* copy VLAN tag from hdr into skb */
5561         if (!card->options.sniffer &&
5562             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5563                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5564                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5565                                 l3_hdr->vlan_id :
5566                                 l3_hdr->next_hop.rx.vlan_id;
5567
5568                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5569         }
5570 }
5571 #endif
5572
5573 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5574                              bool uses_frags, bool is_cso)
5575 {
5576         struct napi_struct *napi = &card->napi;
5577
5578         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5579                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5580                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5581         } else {
5582                 skb->ip_summed = CHECKSUM_NONE;
5583         }
5584
5585         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5586         QETH_CARD_STAT_INC(card, rx_packets);
5587         if (skb_is_nonlinear(skb)) {
5588                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5589                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5590                                    skb_shinfo(skb)->nr_frags);
5591         }
5592
5593         if (uses_frags) {
5594                 napi_gro_frags(napi);
5595         } else {
5596                 skb->protocol = eth_type_trans(skb, skb->dev);
5597                 napi_gro_receive(napi, skb);
5598         }
5599 }
5600
5601 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5602 {
5603         struct page *page = virt_to_page(data);
5604         unsigned int next_frag;
5605
5606         next_frag = skb_shinfo(skb)->nr_frags;
5607         get_page(page);
5608         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5609                         data_len);
5610 }
5611
5612 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5613 {
5614         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5615 }
5616
5617 static int qeth_extract_skb(struct qeth_card *card,
5618                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5619                             int *__offset)
5620 {
5621         struct qeth_priv *priv = netdev_priv(card->dev);
5622         struct qdio_buffer *buffer = qethbuffer->buffer;
5623         struct napi_struct *napi = &card->napi;
5624         struct qdio_buffer_element *element;
5625         unsigned int linear_len = 0;
5626         bool uses_frags = false;
5627         int offset = *__offset;
5628         bool use_rx_sg = false;
5629         unsigned int headroom;
5630         struct qeth_hdr *hdr;
5631         struct sk_buff *skb;
5632         int skb_len = 0;
5633         bool is_cso;
5634
5635         element = &buffer->element[*element_no];
5636
5637 next_packet:
5638         /* qeth_hdr must not cross element boundaries */
5639         while (element->length < offset + sizeof(struct qeth_hdr)) {
5640                 if (qeth_is_last_sbale(element))
5641                         return -ENODATA;
5642                 element++;
5643                 offset = 0;
5644         }
5645
5646         hdr = phys_to_virt(element->addr) + offset;
5647         offset += sizeof(*hdr);
5648         skb = NULL;
5649
5650         switch (hdr->hdr.l2.id) {
5651         case QETH_HEADER_TYPE_LAYER2:
5652                 skb_len = hdr->hdr.l2.pkt_length;
5653                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5654
5655                 linear_len = ETH_HLEN;
5656                 headroom = 0;
5657                 break;
5658         case QETH_HEADER_TYPE_LAYER3:
5659                 skb_len = hdr->hdr.l3.length;
5660                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5661
5662                 if (!IS_LAYER3(card)) {
5663                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5664                         goto walk_packet;
5665                 }
5666
5667                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5668                         linear_len = ETH_HLEN;
5669                         headroom = 0;
5670                         break;
5671                 }
5672
5673                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5674                         linear_len = sizeof(struct ipv6hdr);
5675                 else
5676                         linear_len = sizeof(struct iphdr);
5677                 headroom = ETH_HLEN;
5678                 break;
5679         default:
5680                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5681                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5682                 else
5683                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5684
5685                 /* Can't determine packet length, drop the whole buffer. */
5686                 return -EPROTONOSUPPORT;
5687         }
5688
5689         if (skb_len < linear_len) {
5690                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5691                 goto walk_packet;
5692         }
5693
5694         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5695                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5696                      !atomic_read(&card->force_alloc_skb));
5697
5698         if (use_rx_sg) {
5699                 /* QETH_CQ_ENABLED only: */
5700                 if (qethbuffer->rx_skb &&
5701                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5702                         skb = qethbuffer->rx_skb;
5703                         qethbuffer->rx_skb = NULL;
5704                         goto use_skb;
5705                 }
5706
5707                 skb = napi_get_frags(napi);
5708                 if (!skb) {
5709                         /* -ENOMEM, no point in falling back further. */
5710                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5711                         goto walk_packet;
5712                 }
5713
5714                 if (skb_tailroom(skb) >= linear_len + headroom) {
5715                         uses_frags = true;
5716                         goto use_skb;
5717                 }
5718
5719                 netdev_info_once(card->dev,
5720                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5721                                  linear_len + headroom, skb_tailroom(skb));
5722                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5723         }
5724
5725         linear_len = skb_len;
5726         skb = napi_alloc_skb(napi, linear_len + headroom);
5727         if (!skb) {
5728                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5729                 goto walk_packet;
5730         }
5731
5732 use_skb:
5733         if (headroom)
5734                 skb_reserve(skb, headroom);
5735 walk_packet:
5736         while (skb_len) {
5737                 int data_len = min(skb_len, (int)(element->length - offset));
5738                 char *data = phys_to_virt(element->addr) + offset;
5739
5740                 skb_len -= data_len;
5741                 offset += data_len;
5742
5743                 /* Extract data from current element: */
5744                 if (skb && data_len) {
5745                         if (linear_len) {
5746                                 unsigned int copy_len;
5747
5748                                 copy_len = min_t(unsigned int, linear_len,
5749                                                  data_len);
5750
5751                                 skb_put_data(skb, data, copy_len);
5752                                 linear_len -= copy_len;
5753                                 data_len -= copy_len;
5754                                 data += copy_len;
5755                         }
5756
5757                         if (data_len)
5758                                 qeth_create_skb_frag(skb, data, data_len);
5759                 }
5760
5761                 /* Step forward to next element: */
5762                 if (skb_len) {
5763                         if (qeth_is_last_sbale(element)) {
5764                                 QETH_CARD_TEXT(card, 4, "unexeob");
5765                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5766                                 if (skb) {
5767                                         if (uses_frags)
5768                                                 napi_free_frags(napi);
5769                                         else
5770                                                 kfree_skb(skb);
5771                                         QETH_CARD_STAT_INC(card,
5772                                                            rx_length_errors);
5773                                 }
5774                                 return -EMSGSIZE;
5775                         }
5776                         element++;
5777                         offset = 0;
5778                 }
5779         }
5780
5781         /* This packet was skipped, go get another one: */
5782         if (!skb)
5783                 goto next_packet;
5784
5785         *element_no = element - &buffer->element[0];
5786         *__offset = offset;
5787
5788 #if IS_ENABLED(CONFIG_QETH_L3)
5789         if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5790                 qeth_l3_rebuild_skb(card, skb, hdr);
5791 #endif
5792
5793         qeth_receive_skb(card, skb, uses_frags, is_cso);
5794         return 0;
5795 }
5796
5797 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5798                                       struct qeth_qdio_buffer *buf, bool *done)
5799 {
5800         unsigned int work_done = 0;
5801
5802         while (budget) {
5803                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5804                                      &card->rx.e_offset)) {
5805                         *done = true;
5806                         break;
5807                 }
5808
5809                 work_done++;
5810                 budget--;
5811         }
5812
5813         return work_done;
5814 }
5815
5816 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5817 {
5818         struct qeth_rx *ctx = &card->rx;
5819         unsigned int work_done = 0;
5820
5821         while (budget > 0) {
5822                 struct qeth_qdio_buffer *buffer;
5823                 unsigned int skbs_done = 0;
5824                 bool done = false;
5825
5826                 /* Fetch completed RX buffers: */
5827                 if (!card->rx.b_count) {
5828                         card->rx.qdio_err = 0;
5829                         card->rx.b_count =
5830                                 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5831                                                          &card->rx.b_index,
5832                                                          &card->rx.qdio_err);
5833                         if (card->rx.b_count <= 0) {
5834                                 card->rx.b_count = 0;
5835                                 break;
5836                         }
5837                 }
5838
5839                 /* Process one completed RX buffer: */
5840                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5841                 if (!(card->rx.qdio_err &&
5842                       qeth_check_qdio_errors(card, buffer->buffer,
5843                                              card->rx.qdio_err, "qinerr")))
5844                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5845                                                       &done);
5846                 else
5847                         done = true;
5848
5849                 work_done += skbs_done;
5850                 budget -= skbs_done;
5851
5852                 if (done) {
5853                         QETH_CARD_STAT_INC(card, rx_bufs);
5854                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5855                         buffer->pool_entry = NULL;
5856                         card->rx.b_count--;
5857                         ctx->bufs_refill++;
5858                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5859                                                                  ctx->bufs_refill);
5860
5861                         /* Step forward to next buffer: */
5862                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5863                         card->rx.buf_element = 0;
5864                         card->rx.e_offset = 0;
5865                 }
5866         }
5867
5868         return work_done;
5869 }
5870
5871 static void qeth_cq_poll(struct qeth_card *card)
5872 {
5873         unsigned int work_done = 0;
5874
5875         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5876                 unsigned int start, error;
5877                 int completed;
5878
5879                 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5880                                                      &error);
5881                 if (completed <= 0)
5882                         return;
5883
5884                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5885                 work_done += completed;
5886         }
5887 }
5888
5889 int qeth_poll(struct napi_struct *napi, int budget)
5890 {
5891         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5892         unsigned int work_done;
5893
5894         work_done = qeth_rx_poll(card, budget);
5895
5896         if (qeth_use_tx_irqs(card)) {
5897                 struct qeth_qdio_out_q *queue;
5898                 unsigned int i;
5899
5900                 qeth_for_each_output_queue(card, queue, i) {
5901                         if (!qeth_out_queue_is_empty(queue))
5902                                 napi_schedule(&queue->napi);
5903                 }
5904         }
5905
5906         if (card->options.cq == QETH_CQ_ENABLED)
5907                 qeth_cq_poll(card);
5908
5909         if (budget) {
5910                 struct qeth_rx *ctx = &card->rx;
5911
5912                 /* Process any substantial refill backlog: */
5913                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5914
5915                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5916                 if (work_done >= budget)
5917                         return work_done;
5918         }
5919
5920         if (napi_complete_done(napi, work_done) &&
5921             qdio_start_irq(CARD_DDEV(card)))
5922                 napi_schedule(napi);
5923
5924         return work_done;
5925 }
5926 EXPORT_SYMBOL_GPL(qeth_poll);
5927
5928 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5929                                  unsigned int bidx, unsigned int qdio_error,
5930                                  int budget)
5931 {
5932         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5933         u8 sflags = buffer->buffer->element[15].sflags;
5934         struct qeth_card *card = queue->card;
5935         bool error = !!qdio_error;
5936
5937         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5938                 struct qaob *aob = buffer->aob;
5939                 struct qeth_qaob_priv1 *priv;
5940                 enum iucv_tx_notify notify;
5941
5942                 if (!aob) {
5943                         netdev_WARN_ONCE(card->dev,
5944                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5945                                          bidx, queue->queue_no);
5946                         qeth_schedule_recovery(card);
5947                         return;
5948                 }
5949
5950                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5951
5952                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5953                 /* QAOB hasn't completed yet: */
5954                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5955                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5956
5957                         /* Prepare the queue slot for immediate re-use: */
5958                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5959                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5960                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5961                                 qeth_schedule_recovery(card);
5962                         }
5963
5964                         list_add(&buffer->list_entry, &queue->pending_bufs);
5965                         /* Skip clearing the buffer: */
5966                         return;
5967                 }
5968
5969                 /* QAOB already completed: */
5970                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5971                 qeth_notify_skbs(queue, buffer, notify);
5972                 error = !!aob->aorc;
5973                 memset(aob, 0, sizeof(*aob));
5974         } else if (card->options.cq == QETH_CQ_ENABLED) {
5975                 qeth_notify_skbs(queue, buffer,
5976                                  qeth_compute_cq_notification(sflags, 0));
5977         }
5978
5979         qeth_clear_output_buffer(queue, buffer, error, budget);
5980 }
5981
5982 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5983 {
5984         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5985         unsigned int queue_no = queue->queue_no;
5986         struct qeth_card *card = queue->card;
5987         struct net_device *dev = card->dev;
5988         unsigned int work_done = 0;
5989         struct netdev_queue *txq;
5990
5991         if (IS_IQD(card))
5992                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5993         else
5994                 txq = netdev_get_tx_queue(dev, queue_no);
5995
5996         while (1) {
5997                 unsigned int start, error, i;
5998                 unsigned int packets = 0;
5999                 unsigned int bytes = 0;
6000                 int completed;
6001
6002                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6003
6004                 if (qeth_out_queue_is_empty(queue)) {
6005                         napi_complete(napi);
6006                         return 0;
6007                 }
6008
6009                 /* Give the CPU a breather: */
6010                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6011                         QETH_TXQ_STAT_INC(queue, completion_yield);
6012                         if (napi_complete_done(napi, 0))
6013                                 napi_schedule(napi);
6014                         return 0;
6015                 }
6016
6017                 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
6018                                                       &start, &error);
6019                 if (completed <= 0) {
6020                         /* Ensure we see TX completion for pending work: */
6021                         if (napi_complete_done(napi, 0) &&
6022                             !atomic_read(&queue->set_pci_flags_count))
6023                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
6024                         return 0;
6025                 }
6026
6027                 for (i = start; i < start + completed; i++) {
6028                         struct qeth_qdio_out_buffer *buffer;
6029                         unsigned int bidx = QDIO_BUFNR(i);
6030
6031                         buffer = queue->bufs[bidx];
6032                         packets += buffer->frames;
6033                         bytes += buffer->bytes;
6034
6035                         qeth_handle_send_error(card, buffer, error);
6036                         if (IS_IQD(card))
6037                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
6038                         else
6039                                 qeth_clear_output_buffer(queue, buffer, error,
6040                                                          budget);
6041                 }
6042
6043                 atomic_sub(completed, &queue->used_buffers);
6044                 work_done += completed;
6045                 if (IS_IQD(card))
6046                         netdev_tx_completed_queue(txq, packets, bytes);
6047                 else
6048                         qeth_check_outbound_queue(queue);
6049
6050                 /* xmit may have observed the full-condition, but not yet
6051                  * stopped the txq. In which case the code below won't trigger.
6052                  * So before returning, xmit will re-check the txq's fill level
6053                  * and wake it up if needed.
6054                  */
6055                 if (netif_tx_queue_stopped(txq) &&
6056                     !qeth_out_queue_is_full(queue))
6057                         netif_tx_wake_queue(txq);
6058         }
6059 }
6060
6061 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6062 {
6063         if (!cmd->hdr.return_code)
6064                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6065         return cmd->hdr.return_code;
6066 }
6067
6068 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6069                                         struct qeth_reply *reply,
6070                                         unsigned long data)
6071 {
6072         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6073         struct qeth_ipa_caps *caps = reply->param;
6074
6075         if (qeth_setassparms_inspect_rc(cmd))
6076                 return -EIO;
6077
6078         caps->supported = cmd->data.setassparms.data.caps.supported;
6079         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6080         return 0;
6081 }
6082
6083 int qeth_setassparms_cb(struct qeth_card *card,
6084                         struct qeth_reply *reply, unsigned long data)
6085 {
6086         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6087
6088         QETH_CARD_TEXT(card, 4, "defadpcb");
6089
6090         if (cmd->hdr.return_code)
6091                 return -EIO;
6092
6093         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6094         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6095                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6096         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6097                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6098         return 0;
6099 }
6100 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6101
6102 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6103                                                  enum qeth_ipa_funcs ipa_func,
6104                                                  u16 cmd_code,
6105                                                  unsigned int data_length,
6106                                                  enum qeth_prot_versions prot)
6107 {
6108         struct qeth_ipacmd_setassparms *setassparms;
6109         struct qeth_ipacmd_setassparms_hdr *hdr;
6110         struct qeth_cmd_buffer *iob;
6111
6112         QETH_CARD_TEXT(card, 4, "getasscm");
6113         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6114                                  data_length +
6115                                  offsetof(struct qeth_ipacmd_setassparms,
6116                                           data));
6117         if (!iob)
6118                 return NULL;
6119
6120         setassparms = &__ipa_cmd(iob)->data.setassparms;
6121         setassparms->assist_no = ipa_func;
6122
6123         hdr = &setassparms->hdr;
6124         hdr->length = sizeof(*hdr) + data_length;
6125         hdr->command_code = cmd_code;
6126         return iob;
6127 }
6128 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6129
6130 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6131                                       enum qeth_ipa_funcs ipa_func,
6132                                       u16 cmd_code, u32 *data,
6133                                       enum qeth_prot_versions prot)
6134 {
6135         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6136         struct qeth_cmd_buffer *iob;
6137
6138         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6139         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6140         if (!iob)
6141                 return -ENOMEM;
6142
6143         if (data)
6144                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6145         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6146 }
6147 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6148
6149 static void qeth_unregister_dbf_views(void)
6150 {
6151         int x;
6152
6153         for (x = 0; x < QETH_DBF_INFOS; x++) {
6154                 debug_unregister(qeth_dbf[x].id);
6155                 qeth_dbf[x].id = NULL;
6156         }
6157 }
6158
6159 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6160 {
6161         char dbf_txt_buf[32];
6162         va_list args;
6163
6164         if (!debug_level_enabled(id, level))
6165                 return;
6166         va_start(args, fmt);
6167         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6168         va_end(args);
6169         debug_text_event(id, level, dbf_txt_buf);
6170 }
6171 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6172
6173 static int qeth_register_dbf_views(void)
6174 {
6175         int ret;
6176         int x;
6177
6178         for (x = 0; x < QETH_DBF_INFOS; x++) {
6179                 /* register the areas */
6180                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6181                                                 qeth_dbf[x].pages,
6182                                                 qeth_dbf[x].areas,
6183                                                 qeth_dbf[x].len);
6184                 if (qeth_dbf[x].id == NULL) {
6185                         qeth_unregister_dbf_views();
6186                         return -ENOMEM;
6187                 }
6188
6189                 /* register a view */
6190                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6191                 if (ret) {
6192                         qeth_unregister_dbf_views();
6193                         return ret;
6194                 }
6195
6196                 /* set a passing level */
6197                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6198         }
6199
6200         return 0;
6201 }
6202
6203 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6204
6205 int qeth_setup_discipline(struct qeth_card *card,
6206                           enum qeth_discipline_id discipline)
6207 {
6208         int rc;
6209
6210         mutex_lock(&qeth_mod_mutex);
6211         switch (discipline) {
6212         case QETH_DISCIPLINE_LAYER3:
6213                 card->discipline = try_then_request_module(
6214                         symbol_get(qeth_l3_discipline), "qeth_l3");
6215                 break;
6216         case QETH_DISCIPLINE_LAYER2:
6217                 card->discipline = try_then_request_module(
6218                         symbol_get(qeth_l2_discipline), "qeth_l2");
6219                 break;
6220         default:
6221                 break;
6222         }
6223         mutex_unlock(&qeth_mod_mutex);
6224
6225         if (!card->discipline) {
6226                 dev_err(&card->gdev->dev, "There is no kernel module to "
6227                         "support discipline %d\n", discipline);
6228                 return -EINVAL;
6229         }
6230
6231         rc = card->discipline->setup(card->gdev);
6232         if (rc) {
6233                 if (discipline == QETH_DISCIPLINE_LAYER2)
6234                         symbol_put(qeth_l2_discipline);
6235                 else
6236                         symbol_put(qeth_l3_discipline);
6237                 card->discipline = NULL;
6238
6239                 return rc;
6240         }
6241
6242         card->options.layer = discipline;
6243         return 0;
6244 }
6245
6246 void qeth_remove_discipline(struct qeth_card *card)
6247 {
6248         card->discipline->remove(card->gdev);
6249
6250         if (IS_LAYER2(card))
6251                 symbol_put(qeth_l2_discipline);
6252         else
6253                 symbol_put(qeth_l3_discipline);
6254         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6255         card->discipline = NULL;
6256 }
6257
6258 static const struct device_type qeth_generic_devtype = {
6259         .name = "qeth_generic",
6260 };
6261
6262 #define DBF_NAME_LEN    20
6263
6264 struct qeth_dbf_entry {
6265         char dbf_name[DBF_NAME_LEN];
6266         debug_info_t *dbf_info;
6267         struct list_head dbf_list;
6268 };
6269
6270 static LIST_HEAD(qeth_dbf_list);
6271 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6272
6273 static debug_info_t *qeth_get_dbf_entry(char *name)
6274 {
6275         struct qeth_dbf_entry *entry;
6276         debug_info_t *rc = NULL;
6277
6278         mutex_lock(&qeth_dbf_list_mutex);
6279         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6280                 if (strcmp(entry->dbf_name, name) == 0) {
6281                         rc = entry->dbf_info;
6282                         break;
6283                 }
6284         }
6285         mutex_unlock(&qeth_dbf_list_mutex);
6286         return rc;
6287 }
6288
6289 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6290 {
6291         struct qeth_dbf_entry *new_entry;
6292
6293         card->debug = debug_register(name, 2, 1, 8);
6294         if (!card->debug) {
6295                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6296                 goto err;
6297         }
6298         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6299                 goto err_dbg;
6300         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6301         if (!new_entry)
6302                 goto err_dbg;
6303         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6304         new_entry->dbf_info = card->debug;
6305         mutex_lock(&qeth_dbf_list_mutex);
6306         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6307         mutex_unlock(&qeth_dbf_list_mutex);
6308
6309         return 0;
6310
6311 err_dbg:
6312         debug_unregister(card->debug);
6313 err:
6314         return -ENOMEM;
6315 }
6316
6317 static void qeth_clear_dbf_list(void)
6318 {
6319         struct qeth_dbf_entry *entry, *tmp;
6320
6321         mutex_lock(&qeth_dbf_list_mutex);
6322         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6323                 list_del(&entry->dbf_list);
6324                 debug_unregister(entry->dbf_info);
6325                 kfree(entry);
6326         }
6327         mutex_unlock(&qeth_dbf_list_mutex);
6328 }
6329
6330 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6331 {
6332         struct net_device *dev;
6333         struct qeth_priv *priv;
6334
6335         switch (card->info.type) {
6336         case QETH_CARD_TYPE_IQD:
6337                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6338                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6339                 break;
6340         case QETH_CARD_TYPE_OSM:
6341                 dev = alloc_etherdev(sizeof(*priv));
6342                 break;
6343         default:
6344                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6345         }
6346
6347         if (!dev)
6348                 return NULL;
6349
6350         priv = netdev_priv(dev);
6351         priv->rx_copybreak = QETH_RX_COPYBREAK;
6352         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6353
6354         dev->ml_priv = card;
6355         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6356         dev->min_mtu = 576;
6357          /* initialized when device first goes online: */
6358         dev->max_mtu = 0;
6359         dev->mtu = 0;
6360         SET_NETDEV_DEV(dev, &card->gdev->dev);
6361         netif_carrier_off(dev);
6362
6363         dev->ethtool_ops = &qeth_ethtool_ops;
6364         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6365         dev->hw_features |= NETIF_F_SG;
6366         dev->vlan_features |= NETIF_F_SG;
6367         if (IS_IQD(card))
6368                 dev->features |= NETIF_F_SG;
6369
6370         return dev;
6371 }
6372
6373 struct net_device *qeth_clone_netdev(struct net_device *orig)
6374 {
6375         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6376
6377         if (!clone)
6378                 return NULL;
6379
6380         clone->dev_port = orig->dev_port;
6381         return clone;
6382 }
6383
6384 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6385 {
6386         struct qeth_card *card;
6387         struct device *dev;
6388         int rc;
6389         enum qeth_discipline_id enforced_disc;
6390         char dbf_name[DBF_NAME_LEN];
6391
6392         QETH_DBF_TEXT(SETUP, 2, "probedev");
6393
6394         dev = &gdev->dev;
6395         if (!get_device(dev))
6396                 return -ENODEV;
6397
6398         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6399
6400         card = qeth_alloc_card(gdev);
6401         if (!card) {
6402                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6403                 rc = -ENOMEM;
6404                 goto err_dev;
6405         }
6406
6407         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6408                 dev_name(&gdev->dev));
6409         card->debug = qeth_get_dbf_entry(dbf_name);
6410         if (!card->debug) {
6411                 rc = qeth_add_dbf_entry(card, dbf_name);
6412                 if (rc)
6413                         goto err_card;
6414         }
6415
6416         qeth_setup_card(card);
6417         card->dev = qeth_alloc_netdev(card);
6418         if (!card->dev) {
6419                 rc = -ENOMEM;
6420                 goto err_card;
6421         }
6422
6423         qeth_determine_capabilities(card);
6424         qeth_set_blkt_defaults(card);
6425
6426         card->qdio.in_q = qeth_alloc_qdio_queue();
6427         if (!card->qdio.in_q) {
6428                 rc = -ENOMEM;
6429                 goto err_rx_queue;
6430         }
6431
6432         card->qdio.no_out_queues = card->dev->num_tx_queues;
6433         rc = qeth_update_from_chp_desc(card);
6434         if (rc)
6435                 goto err_chp_desc;
6436
6437         gdev->dev.groups = qeth_dev_groups;
6438
6439         enforced_disc = qeth_enforce_discipline(card);
6440         switch (enforced_disc) {
6441         case QETH_DISCIPLINE_UNDETERMINED:
6442                 gdev->dev.type = &qeth_generic_devtype;
6443                 break;
6444         default:
6445                 card->info.layer_enforced = true;
6446                 /* It's so early that we don't need the discipline_mutex yet. */
6447                 rc = qeth_setup_discipline(card, enforced_disc);
6448                 if (rc)
6449                         goto err_setup_disc;
6450
6451                 break;
6452         }
6453
6454         return 0;
6455
6456 err_setup_disc:
6457 err_chp_desc:
6458         qeth_free_qdio_queue(card->qdio.in_q);
6459 err_rx_queue:
6460         free_netdev(card->dev);
6461 err_card:
6462         qeth_core_free_card(card);
6463 err_dev:
6464         put_device(dev);
6465         return rc;
6466 }
6467
6468 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6469 {
6470         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6471
6472         QETH_CARD_TEXT(card, 2, "removedv");
6473
6474         mutex_lock(&card->discipline_mutex);
6475         if (card->discipline)
6476                 qeth_remove_discipline(card);
6477         mutex_unlock(&card->discipline_mutex);
6478
6479         qeth_free_qdio_queues(card);
6480
6481         qeth_free_qdio_queue(card->qdio.in_q);
6482         free_netdev(card->dev);
6483         qeth_core_free_card(card);
6484         put_device(&gdev->dev);
6485 }
6486
6487 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6488 {
6489         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6490         int rc = 0;
6491         enum qeth_discipline_id def_discipline;
6492
6493         mutex_lock(&card->discipline_mutex);
6494         if (!card->discipline) {
6495                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6496                                                 QETH_DISCIPLINE_LAYER2;
6497                 rc = qeth_setup_discipline(card, def_discipline);
6498                 if (rc)
6499                         goto err;
6500         }
6501
6502         rc = qeth_set_online(card, card->discipline);
6503
6504 err:
6505         mutex_unlock(&card->discipline_mutex);
6506         return rc;
6507 }
6508
6509 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6510 {
6511         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6512         int rc;
6513
6514         mutex_lock(&card->discipline_mutex);
6515         rc = qeth_set_offline(card, card->discipline, false);
6516         mutex_unlock(&card->discipline_mutex);
6517
6518         return rc;
6519 }
6520
6521 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6522 {
6523         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6524
6525         qeth_set_allowed_threads(card, 0, 1);
6526         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6527                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6528         qeth_qdio_clear_card(card, 0);
6529         qeth_drain_output_queues(card);
6530         qdio_free(CARD_DDEV(card));
6531 }
6532
6533 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6534                            size_t count)
6535 {
6536         int err;
6537
6538         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6539                                   buf);
6540
6541         return err ? err : count;
6542 }
6543 static DRIVER_ATTR_WO(group);
6544
6545 static struct attribute *qeth_drv_attrs[] = {
6546         &driver_attr_group.attr,
6547         NULL,
6548 };
6549 static struct attribute_group qeth_drv_attr_group = {
6550         .attrs = qeth_drv_attrs,
6551 };
6552 static const struct attribute_group *qeth_drv_attr_groups[] = {
6553         &qeth_drv_attr_group,
6554         NULL,
6555 };
6556
6557 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6558         .driver = {
6559                 .groups = qeth_drv_attr_groups,
6560                 .owner = THIS_MODULE,
6561                 .name = "qeth",
6562         },
6563         .ccw_driver = &qeth_ccw_driver,
6564         .setup = qeth_core_probe_device,
6565         .remove = qeth_core_remove_device,
6566         .set_online = qeth_core_set_online,
6567         .set_offline = qeth_core_set_offline,
6568         .shutdown = qeth_core_shutdown,
6569 };
6570
6571 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6572 {
6573         struct qeth_card *card = dev->ml_priv;
6574         int rc = 0;
6575
6576         switch (cmd) {
6577         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6578                 rc = qeth_snmp_command(card, data);
6579                 break;
6580         case SIOC_QETH_GET_CARD_TYPE:
6581                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6582                     !IS_VM_NIC(card))
6583                         return 1;
6584                 return 0;
6585         case SIOC_QETH_QUERY_OAT:
6586                 rc = qeth_query_oat_command(card, data);
6587                 break;
6588         default:
6589                 rc = -EOPNOTSUPP;
6590         }
6591         if (rc)
6592                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6593         return rc;
6594 }
6595 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6596
6597 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6598 {
6599         struct qeth_card *card = dev->ml_priv;
6600         struct mii_ioctl_data *mii_data;
6601         int rc = 0;
6602
6603         switch (cmd) {
6604         case SIOCGMIIPHY:
6605                 mii_data = if_mii(rq);
6606                 mii_data->phy_id = 0;
6607                 break;
6608         case SIOCGMIIREG:
6609                 mii_data = if_mii(rq);
6610                 if (mii_data->phy_id != 0)
6611                         rc = -EINVAL;
6612                 else
6613                         mii_data->val_out = qeth_mdio_read(dev,
6614                                 mii_data->phy_id, mii_data->reg_num);
6615                 break;
6616         default:
6617                 return -EOPNOTSUPP;
6618         }
6619         if (rc)
6620                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6621         return rc;
6622 }
6623 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6624
6625 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6626                               unsigned long data)
6627 {
6628         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6629         u32 *features = reply->param;
6630
6631         if (qeth_setassparms_inspect_rc(cmd))
6632                 return -EIO;
6633
6634         *features = cmd->data.setassparms.data.flags_32bit;
6635         return 0;
6636 }
6637
6638 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6639                              enum qeth_prot_versions prot)
6640 {
6641         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6642                                                  NULL, prot);
6643 }
6644
6645 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6646                             enum qeth_prot_versions prot, u8 *lp2lp)
6647 {
6648         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6649         struct qeth_cmd_buffer *iob;
6650         struct qeth_ipa_caps caps;
6651         u32 features;
6652         int rc;
6653
6654         /* some L3 HW requires combined L3+L4 csum offload: */
6655         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6656             cstype == IPA_OUTBOUND_CHECKSUM)
6657                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6658
6659         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6660                                        prot);
6661         if (!iob)
6662                 return -ENOMEM;
6663
6664         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6665         if (rc)
6666                 return rc;
6667
6668         if ((required_features & features) != required_features) {
6669                 qeth_set_csum_off(card, cstype, prot);
6670                 return -EOPNOTSUPP;
6671         }
6672
6673         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6674                                        SETASS_DATA_SIZEOF(flags_32bit),
6675                                        prot);
6676         if (!iob) {
6677                 qeth_set_csum_off(card, cstype, prot);
6678                 return -ENOMEM;
6679         }
6680
6681         if (features & QETH_IPA_CHECKSUM_LP2LP)
6682                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6683         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6684         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6685         if (rc) {
6686                 qeth_set_csum_off(card, cstype, prot);
6687                 return rc;
6688         }
6689
6690         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6691             !qeth_ipa_caps_enabled(&caps, required_features)) {
6692                 qeth_set_csum_off(card, cstype, prot);
6693                 return -EOPNOTSUPP;
6694         }
6695
6696         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6697                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6698
6699         if (lp2lp)
6700                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6701
6702         return 0;
6703 }
6704
6705 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6706                              enum qeth_prot_versions prot, u8 *lp2lp)
6707 {
6708         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6709                     qeth_set_csum_off(card, cstype, prot);
6710 }
6711
6712 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6713                              unsigned long data)
6714 {
6715         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6716         struct qeth_tso_start_data *tso_data = reply->param;
6717
6718         if (qeth_setassparms_inspect_rc(cmd))
6719                 return -EIO;
6720
6721         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6722         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6723         return 0;
6724 }
6725
6726 static int qeth_set_tso_off(struct qeth_card *card,
6727                             enum qeth_prot_versions prot)
6728 {
6729         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6730                                                  IPA_CMD_ASS_STOP, NULL, prot);
6731 }
6732
6733 static int qeth_set_tso_on(struct qeth_card *card,
6734                            enum qeth_prot_versions prot)
6735 {
6736         struct qeth_tso_start_data tso_data;
6737         struct qeth_cmd_buffer *iob;
6738         struct qeth_ipa_caps caps;
6739         int rc;
6740
6741         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6742                                        IPA_CMD_ASS_START, 0, prot);
6743         if (!iob)
6744                 return -ENOMEM;
6745
6746         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6747         if (rc)
6748                 return rc;
6749
6750         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6751                 qeth_set_tso_off(card, prot);
6752                 return -EOPNOTSUPP;
6753         }
6754
6755         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6756                                        IPA_CMD_ASS_ENABLE,
6757                                        SETASS_DATA_SIZEOF(caps), prot);
6758         if (!iob) {
6759                 qeth_set_tso_off(card, prot);
6760                 return -ENOMEM;
6761         }
6762
6763         /* enable TSO capability */
6764         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6765                 QETH_IPA_LARGE_SEND_TCP;
6766         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6767         if (rc) {
6768                 qeth_set_tso_off(card, prot);
6769                 return rc;
6770         }
6771
6772         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6773             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6774                 qeth_set_tso_off(card, prot);
6775                 return -EOPNOTSUPP;
6776         }
6777
6778         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6779                  tso_data.mss);
6780         return 0;
6781 }
6782
6783 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6784                             enum qeth_prot_versions prot)
6785 {
6786         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6787 }
6788
6789 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6790 {
6791         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6792         int rc_ipv6;
6793
6794         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6795                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6796                                             QETH_PROT_IPV4, NULL);
6797         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6798                 /* no/one Offload Assist available, so the rc is trivial */
6799                 return rc_ipv4;
6800
6801         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6802                                     QETH_PROT_IPV6, NULL);
6803
6804         if (on)
6805                 /* enable: success if any Assist is active */
6806                 return (rc_ipv6) ? rc_ipv4 : 0;
6807
6808         /* disable: failure if any Assist is still active */
6809         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6810 }
6811
6812 /**
6813  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6814  * @dev:        a net_device
6815  */
6816 void qeth_enable_hw_features(struct net_device *dev)
6817 {
6818         struct qeth_card *card = dev->ml_priv;
6819         netdev_features_t features;
6820
6821         features = dev->features;
6822         /* force-off any feature that might need an IPA sequence.
6823          * netdev_update_features() will restart them.
6824          */
6825         dev->features &= ~dev->hw_features;
6826         /* toggle VLAN filter, so that VIDs are re-programmed: */
6827         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6828                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6829                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6830         }
6831         netdev_update_features(dev);
6832         if (features != dev->features)
6833                 dev_warn(&card->gdev->dev,
6834                          "Device recovery failed to restore all offload features\n");
6835 }
6836 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6837
6838 static void qeth_check_restricted_features(struct qeth_card *card,
6839                                            netdev_features_t changed,
6840                                            netdev_features_t actual)
6841 {
6842         netdev_features_t ipv6_features = NETIF_F_TSO6;
6843         netdev_features_t ipv4_features = NETIF_F_TSO;
6844
6845         if (!card->info.has_lp2lp_cso_v6)
6846                 ipv6_features |= NETIF_F_IPV6_CSUM;
6847         if (!card->info.has_lp2lp_cso_v4)
6848                 ipv4_features |= NETIF_F_IP_CSUM;
6849
6850         if ((changed & ipv6_features) && !(actual & ipv6_features))
6851                 qeth_flush_local_addrs6(card);
6852         if ((changed & ipv4_features) && !(actual & ipv4_features))
6853                 qeth_flush_local_addrs4(card);
6854 }
6855
6856 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6857 {
6858         struct qeth_card *card = dev->ml_priv;
6859         netdev_features_t changed = dev->features ^ features;
6860         int rc = 0;
6861
6862         QETH_CARD_TEXT(card, 2, "setfeat");
6863         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6864
6865         if ((changed & NETIF_F_IP_CSUM)) {
6866                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6867                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6868                                        &card->info.has_lp2lp_cso_v4);
6869                 if (rc)
6870                         changed ^= NETIF_F_IP_CSUM;
6871         }
6872         if (changed & NETIF_F_IPV6_CSUM) {
6873                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6874                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6875                                        &card->info.has_lp2lp_cso_v6);
6876                 if (rc)
6877                         changed ^= NETIF_F_IPV6_CSUM;
6878         }
6879         if (changed & NETIF_F_RXCSUM) {
6880                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6881                 if (rc)
6882                         changed ^= NETIF_F_RXCSUM;
6883         }
6884         if (changed & NETIF_F_TSO) {
6885                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6886                                       QETH_PROT_IPV4);
6887                 if (rc)
6888                         changed ^= NETIF_F_TSO;
6889         }
6890         if (changed & NETIF_F_TSO6) {
6891                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6892                                       QETH_PROT_IPV6);
6893                 if (rc)
6894                         changed ^= NETIF_F_TSO6;
6895         }
6896
6897         qeth_check_restricted_features(card, dev->features ^ features,
6898                                        dev->features ^ changed);
6899
6900         /* everything changed successfully? */
6901         if ((dev->features ^ features) == changed)
6902                 return 0;
6903         /* something went wrong. save changed features and return error */
6904         dev->features ^= changed;
6905         return -EIO;
6906 }
6907 EXPORT_SYMBOL_GPL(qeth_set_features);
6908
6909 netdev_features_t qeth_fix_features(struct net_device *dev,
6910                                     netdev_features_t features)
6911 {
6912         struct qeth_card *card = dev->ml_priv;
6913
6914         QETH_CARD_TEXT(card, 2, "fixfeat");
6915         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6916                 features &= ~NETIF_F_IP_CSUM;
6917         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6918                 features &= ~NETIF_F_IPV6_CSUM;
6919         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6920             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6921                 features &= ~NETIF_F_RXCSUM;
6922         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6923                 features &= ~NETIF_F_TSO;
6924         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6925                 features &= ~NETIF_F_TSO6;
6926
6927         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6928         return features;
6929 }
6930 EXPORT_SYMBOL_GPL(qeth_fix_features);
6931
6932 netdev_features_t qeth_features_check(struct sk_buff *skb,
6933                                       struct net_device *dev,
6934                                       netdev_features_t features)
6935 {
6936         struct qeth_card *card = dev->ml_priv;
6937
6938         /* Traffic with local next-hop is not eligible for some offloads: */
6939         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6940             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6941                 netdev_features_t restricted = 0;
6942
6943                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6944                         restricted |= NETIF_F_ALL_TSO;
6945
6946                 switch (vlan_get_protocol(skb)) {
6947                 case htons(ETH_P_IP):
6948                         if (!card->info.has_lp2lp_cso_v4)
6949                                 restricted |= NETIF_F_IP_CSUM;
6950
6951                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6952                                 features &= ~restricted;
6953                         break;
6954                 case htons(ETH_P_IPV6):
6955                         if (!card->info.has_lp2lp_cso_v6)
6956                                 restricted |= NETIF_F_IPV6_CSUM;
6957
6958                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6959                                 features &= ~restricted;
6960                         break;
6961                 default:
6962                         break;
6963                 }
6964         }
6965
6966         /* GSO segmentation builds skbs with
6967          *      a (small) linear part for the headers, and
6968          *      page frags for the data.
6969          * Compared to a linear skb, the header-only part consumes an
6970          * additional buffer element. This reduces buffer utilization, and
6971          * hurts throughput. So compress small segments into one element.
6972          */
6973         if (netif_needs_gso(skb, features)) {
6974                 /* match skb_segment(): */
6975                 unsigned int doffset = skb->data - skb_mac_header(skb);
6976                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6977                 unsigned int hroom = skb_headroom(skb);
6978
6979                 /* linearize only if resulting skb allocations are order-0: */
6980                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6981                         features &= ~NETIF_F_SG;
6982         }
6983
6984         return vlan_features_check(skb, features);
6985 }
6986 EXPORT_SYMBOL_GPL(qeth_features_check);
6987
6988 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6989 {
6990         struct qeth_card *card = dev->ml_priv;
6991         struct qeth_qdio_out_q *queue;
6992         unsigned int i;
6993
6994         QETH_CARD_TEXT(card, 5, "getstat");
6995
6996         stats->rx_packets = card->stats.rx_packets;
6997         stats->rx_bytes = card->stats.rx_bytes;
6998         stats->rx_errors = card->stats.rx_length_errors +
6999                            card->stats.rx_frame_errors +
7000                            card->stats.rx_fifo_errors;
7001         stats->rx_dropped = card->stats.rx_dropped_nomem +
7002                             card->stats.rx_dropped_notsupp +
7003                             card->stats.rx_dropped_runt;
7004         stats->multicast = card->stats.rx_multicast;
7005         stats->rx_length_errors = card->stats.rx_length_errors;
7006         stats->rx_frame_errors = card->stats.rx_frame_errors;
7007         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7008
7009         for (i = 0; i < card->qdio.no_out_queues; i++) {
7010                 queue = card->qdio.out_qs[i];
7011
7012                 stats->tx_packets += queue->stats.tx_packets;
7013                 stats->tx_bytes += queue->stats.tx_bytes;
7014                 stats->tx_errors += queue->stats.tx_errors;
7015                 stats->tx_dropped += queue->stats.tx_dropped;
7016         }
7017 }
7018 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7019
7020 #define TC_IQD_UCAST   0
7021 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7022                                      unsigned int ucast_txqs)
7023 {
7024         unsigned int prio;
7025
7026         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7027          * qeth_iqd_select_queue() deals with this.
7028          * For unicast traffic, we defer the queue selection to the stack.
7029          * By installing a trivial prio map that spans over only the unicast
7030          * queues, we can encourage the stack to spread the ucast traffic evenly
7031          * without selecting the mcast queue.
7032          */
7033
7034         /* One traffic class, spanning over all active ucast queues: */
7035         netdev_set_num_tc(dev, 1);
7036         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7037                             QETH_IQD_MIN_UCAST_TXQ);
7038
7039         /* Map all priorities to this traffic class: */
7040         for (prio = 0; prio <= TC_BITMASK; prio++)
7041                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7042 }
7043
7044 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7045 {
7046         struct net_device *dev = card->dev;
7047         int rc;
7048
7049         /* Per netif_setup_tc(), adjust the mapping first: */
7050         if (IS_IQD(card))
7051                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7052
7053         rc = netif_set_real_num_tx_queues(dev, count);
7054
7055         if (rc && IS_IQD(card))
7056                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7057
7058         return rc;
7059 }
7060 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7061
7062 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7063                           u8 cast_type, struct net_device *sb_dev)
7064 {
7065         u16 txq;
7066
7067         if (cast_type != RTN_UNICAST)
7068                 return QETH_IQD_MCAST_TXQ;
7069         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7070                 return QETH_IQD_MIN_UCAST_TXQ;
7071
7072         txq = netdev_pick_tx(dev, skb, sb_dev);
7073         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7074 }
7075 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7076
7077 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7078                           struct net_device *sb_dev)
7079 {
7080         struct qeth_card *card = dev->ml_priv;
7081
7082         if (qeth_uses_tx_prio_queueing(card))
7083                 return qeth_get_priority_queue(card, skb);
7084
7085         return netdev_pick_tx(dev, skb, sb_dev);
7086 }
7087 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7088
7089 int qeth_open(struct net_device *dev)
7090 {
7091         struct qeth_card *card = dev->ml_priv;
7092         struct qeth_qdio_out_q *queue;
7093         unsigned int i;
7094
7095         QETH_CARD_TEXT(card, 4, "qethopen");
7096
7097         card->data.state = CH_STATE_UP;
7098         netif_tx_start_all_queues(dev);
7099
7100         local_bh_disable();
7101         qeth_for_each_output_queue(card, queue, i) {
7102                 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7103                 napi_enable(&queue->napi);
7104                 napi_schedule(&queue->napi);
7105         }
7106
7107         napi_enable(&card->napi);
7108         napi_schedule(&card->napi);
7109         /* kick-start the NAPI softirq: */
7110         local_bh_enable();
7111
7112         return 0;
7113 }
7114 EXPORT_SYMBOL_GPL(qeth_open);
7115
7116 int qeth_stop(struct net_device *dev)
7117 {
7118         struct qeth_card *card = dev->ml_priv;
7119         struct qeth_qdio_out_q *queue;
7120         unsigned int i;
7121
7122         QETH_CARD_TEXT(card, 4, "qethstop");
7123
7124         napi_disable(&card->napi);
7125         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7126         qdio_stop_irq(CARD_DDEV(card));
7127
7128         /* Quiesce the NAPI instances: */
7129         qeth_for_each_output_queue(card, queue, i)
7130                 napi_disable(&queue->napi);
7131
7132         /* Stop .ndo_start_xmit, might still access queue->napi. */
7133         netif_tx_disable(dev);
7134
7135         qeth_for_each_output_queue(card, queue, i) {
7136                 del_timer_sync(&queue->timer);
7137                 /* Queues may get re-allocated, so remove the NAPIs. */
7138                 netif_napi_del(&queue->napi);
7139         }
7140
7141         return 0;
7142 }
7143 EXPORT_SYMBOL_GPL(qeth_stop);
7144
7145 static int __init qeth_core_init(void)
7146 {
7147         int rc;
7148
7149         pr_info("loading core functions\n");
7150
7151         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7152
7153         rc = qeth_register_dbf_views();
7154         if (rc)
7155                 goto dbf_err;
7156         qeth_core_root_dev = root_device_register("qeth");
7157         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7158         if (rc)
7159                 goto register_err;
7160         qeth_core_header_cache =
7161                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7162                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7163                                   0, NULL);
7164         if (!qeth_core_header_cache) {
7165                 rc = -ENOMEM;
7166                 goto slab_err;
7167         }
7168         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7169                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7170         if (!qeth_qdio_outbuf_cache) {
7171                 rc = -ENOMEM;
7172                 goto cqslab_err;
7173         }
7174
7175         qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7176                                             sizeof(struct qaob),
7177                                             sizeof(struct qaob),
7178                                             0, NULL);
7179         if (!qeth_qaob_cache) {
7180                 rc = -ENOMEM;
7181                 goto qaob_err;
7182         }
7183
7184         rc = ccw_driver_register(&qeth_ccw_driver);
7185         if (rc)
7186                 goto ccw_err;
7187         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7188         if (rc)
7189                 goto ccwgroup_err;
7190
7191         return 0;
7192
7193 ccwgroup_err:
7194         ccw_driver_unregister(&qeth_ccw_driver);
7195 ccw_err:
7196         kmem_cache_destroy(qeth_qaob_cache);
7197 qaob_err:
7198         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7199 cqslab_err:
7200         kmem_cache_destroy(qeth_core_header_cache);
7201 slab_err:
7202         root_device_unregister(qeth_core_root_dev);
7203 register_err:
7204         qeth_unregister_dbf_views();
7205 dbf_err:
7206         debugfs_remove_recursive(qeth_debugfs_root);
7207         pr_err("Initializing the qeth device driver failed\n");
7208         return rc;
7209 }
7210
7211 static void __exit qeth_core_exit(void)
7212 {
7213         qeth_clear_dbf_list();
7214         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7215         ccw_driver_unregister(&qeth_ccw_driver);
7216         kmem_cache_destroy(qeth_qaob_cache);
7217         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7218         kmem_cache_destroy(qeth_core_header_cache);
7219         root_device_unregister(qeth_core_root_dev);
7220         qeth_unregister_dbf_views();
7221         debugfs_remove_recursive(qeth_debugfs_root);
7222         pr_info("core functions removed\n");
7223 }
7224
7225 module_init(qeth_core_init);
7226 module_exit(qeth_core_exit);
7227 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7228 MODULE_DESCRIPTION("qeth core functions");
7229 MODULE_LICENSE("GPL");