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 void qeth_free_cq(struct qeth_card *card)
 368 {
 369         if (card->qdio.c_q) {
 370                 qeth_free_qdio_queue(card->qdio.c_q);
 371                 card->qdio.c_q = NULL;
 372         }
 373 }
 374
 375 static int qeth_alloc_cq(struct qeth_card *card)
 376 {
 377         if (card->options.cq == QETH_CQ_ENABLED) {
 378                 QETH_CARD_TEXT(card, 2, "cqon");
 379                 if (!card->qdio.c_q) {
 380                         card->qdio.c_q = qeth_alloc_qdio_queue();
 381                         if (!card->qdio.c_q) {
 382                                 dev_err(&card->gdev->dev,
 383                                         "Failed to create completion queue\n");
 384                                 return -ENOMEM;
 385                         }
 386                 }
 387         } else {
 388                 QETH_CARD_TEXT(card, 2, "nocq");
 389                 qeth_free_cq(card);
 390         }
 391         return 0;
 392 }
 393
 394 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 395                                                         int delayed)
 396 {
 397         enum iucv_tx_notify n;
 398
 399         switch (sbalf15) {
 400         case 0:
 401                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 402                 break;
 403         case 4:
 404         case 16:
 405         case 17:
 406         case 18:
 407                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 408                         TX_NOTIFY_UNREACHABLE;
 409                 break;
 410         default:
 411                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 412                         TX_NOTIFY_GENERALERROR;
 413                 break;
 414         }
 415
 416         return n;
 417 }
 418
 419 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 420 {
 421         if (refcount_dec_and_test(&iob->ref_count)) {
 422                 kfree(iob->data);
 423                 kfree(iob);
 424         }
 425 }
 426 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 427                            void *data)
 428 {
 429         ccw->cmd_code = cmd_code;
 430         ccw->flags = flags | CCW_FLAG_SLI;
 431         ccw->count = len;
 432         ccw->cda = virt_to_dma32(data);
 433 }
 434
 435 static int __qeth_issue_next_read(struct qeth_card *card)
 436 {
 437         struct qeth_cmd_buffer *iob = card->read_cmd;
 438         struct qeth_channel *channel = iob->channel;
 439         struct ccw1 *ccw = __ccw_from_cmd(iob);
 440         int rc;
 441
 442         QETH_CARD_TEXT(card, 5, "issnxrd");
 443         if (channel->state != CH_STATE_UP)
 444                 return -EIO;
 445
 446         memset(iob->data, 0, iob->length);
 447         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 448         iob->callback = qeth_issue_next_read_cb;
 449         /* keep the cmd alive after completion: */
 450         qeth_get_cmd(iob);
 451
 452         QETH_CARD_TEXT(card, 6, "noirqpnd");
 453         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 454         if (!rc) {
 455                 channel->active_cmd = iob;
 456         } else {
 457                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 458                                  rc, CARD_DEVID(card));
 459                 qeth_unlock_channel(card, channel);
 460                 qeth_put_cmd(iob);
 461                 card->read_or_write_problem = 1;
 462                 qeth_schedule_recovery(card);
 463         }
 464         return rc;
 465 }
 466
 467 static int qeth_issue_next_read(struct qeth_card *card)
 468 {
 469         int ret;
 470
 471         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 472         ret = __qeth_issue_next_read(card);
 473         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 474
 475         return ret;
 476 }
 477
 478 static void qeth_enqueue_cmd(struct qeth_card *card,
 479                              struct qeth_cmd_buffer *iob)
 480 {
 481         spin_lock_irq(&card->lock);
 482         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 483         spin_unlock_irq(&card->lock);
 484 }
 485
 486 static void qeth_dequeue_cmd(struct qeth_card *card,
 487                              struct qeth_cmd_buffer *iob)
 488 {
 489         spin_lock_irq(&card->lock);
 490         list_del(&iob->list_entry);
 491         spin_unlock_irq(&card->lock);
 492 }
 493
 494 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 495 {
 496         iob->rc = reason;
 497         complete(&iob->done);
 498 }
 499
 500 static void qeth_flush_local_addrs4(struct qeth_card *card)
 501 {
 502         struct qeth_local_addr *addr;
 503         struct hlist_node *tmp;
 504         unsigned int i;
 505
 506         spin_lock_irq(&card->local_addrs4_lock);
 507         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 508                 hash_del_rcu(&addr->hnode);
 509                 kfree_rcu(addr, rcu);
 510         }
 511         spin_unlock_irq(&card->local_addrs4_lock);
 512 }
 513
 514 static void qeth_flush_local_addrs6(struct qeth_card *card)
 515 {
 516         struct qeth_local_addr *addr;
 517         struct hlist_node *tmp;
 518         unsigned int i;
 519
 520         spin_lock_irq(&card->local_addrs6_lock);
 521         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 522                 hash_del_rcu(&addr->hnode);
 523                 kfree_rcu(addr, rcu);
 524         }
 525         spin_unlock_irq(&card->local_addrs6_lock);
 526 }
 527
 528 static void qeth_flush_local_addrs(struct qeth_card *card)
 529 {
 530         qeth_flush_local_addrs4(card);
 531         qeth_flush_local_addrs6(card);
 532 }
 533
 534 static void qeth_add_local_addrs4(struct qeth_card *card,
 535                                   struct qeth_ipacmd_local_addrs4 *cmd)
 536 {
 537         unsigned int i;
 538
 539         if (cmd->addr_length !=
 540             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 541                 dev_err_ratelimited(&card->gdev->dev,
 542                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 543                                     cmd->addr_length);
 544                 return;
 545         }
 546
 547         spin_lock(&card->local_addrs4_lock);
 548         for (i = 0; i < cmd->count; i++) {
 549                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 550                 struct qeth_local_addr *addr;
 551                 bool duplicate = false;
 552
 553                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 554                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 555                                 duplicate = true;
 556                                 break;
 557                         }
 558                 }
 559
 560                 if (duplicate)
 561                         continue;
 562
 563                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 564                 if (!addr) {
 565                         dev_err(&card->gdev->dev,
 566                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 567                                 &cmd->addrs[i].addr);
 568                         continue;
 569                 }
 570
 571                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 572                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 573         }
 574         spin_unlock(&card->local_addrs4_lock);
 575 }
 576
 577 static void qeth_add_local_addrs6(struct qeth_card *card,
 578                                   struct qeth_ipacmd_local_addrs6 *cmd)
 579 {
 580         unsigned int i;
 581
 582         if (cmd->addr_length !=
 583             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 584                 dev_err_ratelimited(&card->gdev->dev,
 585                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 586                                     cmd->addr_length);
 587                 return;
 588         }
 589
 590         spin_lock(&card->local_addrs6_lock);
 591         for (i = 0; i < cmd->count; i++) {
 592                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 593                 struct qeth_local_addr *addr;
 594                 bool duplicate = false;
 595
 596                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 597                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 598                                 duplicate = true;
 599                                 break;
 600                         }
 601                 }
 602
 603                 if (duplicate)
 604                         continue;
 605
 606                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 607                 if (!addr) {
 608                         dev_err(&card->gdev->dev,
 609                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 610                                 &cmd->addrs[i].addr);
 611                         continue;
 612                 }
 613
 614                 addr->addr = cmd->addrs[i].addr;
 615                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 616         }
 617         spin_unlock(&card->local_addrs6_lock);
 618 }
 619
 620 static void qeth_del_local_addrs4(struct qeth_card *card,
 621                                   struct qeth_ipacmd_local_addrs4 *cmd)
 622 {
 623         unsigned int i;
 624
 625         if (cmd->addr_length !=
 626             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 627                 dev_err_ratelimited(&card->gdev->dev,
 628                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 629                                     cmd->addr_length);
 630                 return;
 631         }
 632
 633         spin_lock(&card->local_addrs4_lock);
 634         for (i = 0; i < cmd->count; i++) {
 635                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 636                 unsigned int key = ipv4_addr_hash(addr->addr);
 637                 struct qeth_local_addr *tmp;
 638
 639                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 640                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 641                                 hash_del_rcu(&tmp->hnode);
 642                                 kfree_rcu(tmp, rcu);
 643                                 break;
 644                         }
 645                 }
 646         }
 647         spin_unlock(&card->local_addrs4_lock);
 648 }
 649
 650 static void qeth_del_local_addrs6(struct qeth_card *card,
 651                                   struct qeth_ipacmd_local_addrs6 *cmd)
 652 {
 653         unsigned int i;
 654
 655         if (cmd->addr_length !=
 656             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 657                 dev_err_ratelimited(&card->gdev->dev,
 658                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 659                                     cmd->addr_length);
 660                 return;
 661         }
 662
 663         spin_lock(&card->local_addrs6_lock);
 664         for (i = 0; i < cmd->count; i++) {
 665                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 666                 u32 key = ipv6_addr_hash(&addr->addr);
 667                 struct qeth_local_addr *tmp;
 668
 669                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 670                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 671                                 hash_del_rcu(&tmp->hnode);
 672                                 kfree_rcu(tmp, rcu);
 673                                 break;
 674                         }
 675                 }
 676         }
 677         spin_unlock(&card->local_addrs6_lock);
 678 }
 679
 680 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 681                                       struct sk_buff *skb)
 682 {
 683         struct qeth_local_addr *tmp;
 684         bool is_local = false;
 685         unsigned int key;
 686         __be32 next_hop;
 687
 688         if (hash_empty(card->local_addrs4))
 689                 return false;
 690
 691         rcu_read_lock();
 692         next_hop = qeth_next_hop_v4_rcu(skb,
 693                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 694         key = ipv4_addr_hash(next_hop);
 695
 696         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 697                 if (tmp->addr.s6_addr32[3] == next_hop) {
 698                         is_local = true;
 699                         break;
 700                 }
 701         }
 702         rcu_read_unlock();
 703
 704         return is_local;
 705 }
 706
 707 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 708                                       struct sk_buff *skb)
 709 {
 710         struct qeth_local_addr *tmp;
 711         struct in6_addr *next_hop;
 712         bool is_local = false;
 713         u32 key;
 714
 715         if (hash_empty(card->local_addrs6))
 716                 return false;
 717
 718         rcu_read_lock();
 719         next_hop = qeth_next_hop_v6_rcu(skb,
 720                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 721         key = ipv6_addr_hash(next_hop);
 722
 723         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 724                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 725                         is_local = true;
 726                         break;
 727                 }
 728         }
 729         rcu_read_unlock();
 730
 731         return is_local;
 732 }
 733
 734 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 735 {
 736         struct qeth_card *card = m->private;
 737         struct qeth_local_addr *tmp;
 738         unsigned int i;
 739
 740         rcu_read_lock();
 741         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 742                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 743         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 744                 seq_printf(m, "%pI6c\n", &tmp->addr);
 745         rcu_read_unlock();
 746
 747         return 0;
 748 }
 749
 750 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 751
 752 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 753                 struct qeth_card *card)
 754 {
 755         const char *ipa_name;
 756         int com = cmd->hdr.command;
 757
 758         ipa_name = qeth_get_ipa_cmd_name(com);
 759
 760         if (rc)
 761                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 762                                  ipa_name, com, CARD_DEVID(card), rc,
 763                                  qeth_get_ipa_msg(rc));
 764         else
 765                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 766                                  ipa_name, com, CARD_DEVID(card));
 767 }
 768
 769 static void qeth_default_link_info(struct qeth_card *card)
 770 {
 771         struct qeth_link_info *link_info = &card->info.link_info;
 772
 773         QETH_CARD_TEXT(card, 2, "dftlinfo");
 774         link_info->duplex = DUPLEX_FULL;
 775
 776         if (IS_IQD(card) || IS_VM_NIC(card)) {
 777                 link_info->speed = SPEED_10000;
 778                 link_info->port = PORT_FIBRE;
 779                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
 780         } else {
 781                 switch (card->info.link_type) {
 782                 case QETH_LINK_TYPE_FAST_ETH:
 783                 case QETH_LINK_TYPE_LANE_ETH100:
 784                         link_info->speed = SPEED_100;
 785                         link_info->port = PORT_TP;
 786                         break;
 787                 case QETH_LINK_TYPE_GBIT_ETH:
 788                 case QETH_LINK_TYPE_LANE_ETH1000:
 789                         link_info->speed = SPEED_1000;
 790                         link_info->port = PORT_FIBRE;
 791                         break;
 792                 case QETH_LINK_TYPE_10GBIT_ETH:
 793                         link_info->speed = SPEED_10000;
 794                         link_info->port = PORT_FIBRE;
 795                         break;
 796                 case QETH_LINK_TYPE_25GBIT_ETH:
 797                         link_info->speed = SPEED_25000;
 798                         link_info->port = PORT_FIBRE;
 799                         break;
 800                 default:
 801                         dev_info(&card->gdev->dev,
 802                                  "Unknown link type %x\n",
 803                                  card->info.link_type);
 804                         link_info->speed = SPEED_UNKNOWN;
 805                         link_info->port = PORT_OTHER;
 806                 }
 807
 808                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
 809         }
 810 }
 811
 812 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 813                                                 struct qeth_ipa_cmd *cmd)
 814 {
 815         QETH_CARD_TEXT(card, 5, "chkipad");
 816
 817         if (IS_IPA_REPLY(cmd)) {
 818                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 819                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 820                 return cmd;
 821         }
 822
 823         /* handle unsolicited event: */
 824         switch (cmd->hdr.command) {
 825         case IPA_CMD_STOPLAN:
 826                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 827                         dev_err(&card->gdev->dev,
 828                                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
 829                                 netdev_name(card->dev));
 830                         /* Set offline, then probably fail to set online: */
 831                         qeth_schedule_recovery(card);
 832                 } else {
 833                         /* stay online for subsequent STARTLAN */
 834                         dev_warn(&card->gdev->dev,
 835                                  "The link for interface %s on CHPID 0x%X failed\n",
 836                                  netdev_name(card->dev), card->info.chpid);
 837                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 838                         netif_carrier_off(card->dev);
 839                         qeth_default_link_info(card);
 840                 }
 841                 return NULL;
 842         case IPA_CMD_STARTLAN:
 843                 dev_info(&card->gdev->dev,
 844                          "The link for %s on CHPID 0x%X has been restored\n",
 845                          netdev_name(card->dev), card->info.chpid);
 846                 if (card->info.hwtrap)
 847                         card->info.hwtrap = 2;
 848                 qeth_schedule_recovery(card);
 849                 return NULL;
 850         case IPA_CMD_SETBRIDGEPORT_IQD:
 851         case IPA_CMD_SETBRIDGEPORT_OSA:
 852         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 853                 if (card->discipline->control_event_handler(card, cmd))
 854                         return cmd;
 855                 return NULL;
 856         case IPA_CMD_REGISTER_LOCAL_ADDR:
 857                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 858                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 859                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 860                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 861
 862                 QETH_CARD_TEXT(card, 3, "irla");
 863                 return NULL;
 864         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 865                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 866                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 867                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 868                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 869
 870                 QETH_CARD_TEXT(card, 3, "urla");
 871                 return NULL;
 872         default:
 873                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 874                 return cmd;
 875         }
 876 }
 877
 878 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 879 {
 880         struct qeth_cmd_buffer *iob;
 881         unsigned long flags;
 882
 883         QETH_CARD_TEXT(card, 4, "clipalst");
 884
 885         spin_lock_irqsave(&card->lock, flags);
 886         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 887                 qeth_notify_cmd(iob, -ECANCELED);
 888         spin_unlock_irqrestore(&card->lock, flags);
 889 }
 890
 891 static int qeth_check_idx_response(struct qeth_card *card,
 892         unsigned char *buffer)
 893 {
 894         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 895         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 896                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 897                                  buffer[4]);
 898                 QETH_CARD_TEXT(card, 2, "ckidxres");
 899                 QETH_CARD_TEXT(card, 2, " idxterm");
 900                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 901                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 902                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 903                         dev_err(&card->gdev->dev,
 904                                 "The device does not support the configured transport mode\n");
 905                         return -EPROTONOSUPPORT;
 906                 }
 907                 return -EIO;
 908         }
 909         return 0;
 910 }
 911
 912 static void qeth_release_buffer_cb(struct qeth_card *card,
 913                                    struct qeth_cmd_buffer *iob,
 914                                    unsigned int data_length)
 915 {
 916         qeth_put_cmd(iob);
 917 }
 918
 919 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 920 {
 921         qeth_notify_cmd(iob, rc);
 922         qeth_put_cmd(iob);
 923 }
 924
 925 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 926                                               unsigned int length,
 927                                               unsigned int ccws, long timeout)
 928 {
 929         struct qeth_cmd_buffer *iob;
 930
 931         if (length > QETH_BUFSIZE)
 932                 return NULL;
 933
 934         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 935         if (!iob)
 936                 return NULL;
 937
 938         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 939                             GFP_KERNEL | GFP_DMA);
 940         if (!iob->data) {
 941                 kfree(iob);
 942                 return NULL;
 943         }
 944
 945         init_completion(&iob->done);
 946         spin_lock_init(&iob->lock);
 947         refcount_set(&iob->ref_count, 1);
 948         iob->channel = channel;
 949         iob->timeout = timeout;
 950         iob->length = length;
 951         return iob;
 952 }
 953
 954 static void qeth_issue_next_read_cb(struct qeth_card *card,
 955                                     struct qeth_cmd_buffer *iob,
 956                                     unsigned int data_length)
 957 {
 958         struct qeth_cmd_buffer *request = NULL;
 959         struct qeth_ipa_cmd *cmd = NULL;
 960         struct qeth_reply *reply = NULL;
 961         struct qeth_cmd_buffer *tmp;
 962         unsigned long flags;
 963         int rc = 0;
 964
 965         QETH_CARD_TEXT(card, 4, "sndctlcb");
 966         rc = qeth_check_idx_response(card, iob->data);
 967         switch (rc) {
 968         case 0:
 969                 break;
 970         case -EIO:
 971                 qeth_schedule_recovery(card);
 972                 fallthrough;
 973         default:
 974                 qeth_clear_ipacmd_list(card);
 975                 goto err_idx;
 976         }
 977
 978         cmd = __ipa_reply(iob);
 979         if (cmd) {
 980                 cmd = qeth_check_ipa_data(card, cmd);
 981                 if (!cmd)
 982                         goto out;
 983         }
 984
 985         /* match against pending cmd requests */
 986         spin_lock_irqsave(&card->lock, flags);
 987         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 988                 if (tmp->match && tmp->match(tmp, iob)) {
 989                         request = tmp;
 990                         /* take the object outside the lock */
 991                         qeth_get_cmd(request);
 992                         break;
 993                 }
 994         }
 995         spin_unlock_irqrestore(&card->lock, flags);
 996
 997         if (!request)
 998                 goto out;
 999
1000         reply = &request->reply;
1001         if (!reply->callback) {
1002                 rc = 0;
1003                 goto no_callback;
1004         }
1005
1006         spin_lock_irqsave(&request->lock, flags);
1007         if (request->rc)
1008                 /* Bail out when the requestor has already left: */
1009                 rc = request->rc;
1010         else
1011                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1012                                                         (unsigned long)iob);
1013         spin_unlock_irqrestore(&request->lock, flags);
1014
1015 no_callback:
1016         if (rc <= 0)
1017                 qeth_notify_cmd(request, rc);
1018         qeth_put_cmd(request);
1019 out:
1020         memcpy(&card->seqno.pdu_hdr_ack,
1021                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1022                 QETH_SEQ_NO_LENGTH);
1023         __qeth_issue_next_read(card);
1024 err_idx:
1025         qeth_put_cmd(iob);
1026 }
1027
1028 static int qeth_set_thread_start_bit(struct qeth_card *card,
1029                 unsigned long thread)
1030 {
1031         unsigned long flags;
1032         int rc = 0;
1033
1034         spin_lock_irqsave(&card->thread_mask_lock, flags);
1035         if (!(card->thread_allowed_mask & thread))
1036                 rc = -EPERM;
1037         else if (card->thread_start_mask & thread)
1038                 rc = -EBUSY;
1039         else
1040                 card->thread_start_mask |= thread;
1041         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1042
1043         return rc;
1044 }
1045
1046 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1047                                         unsigned long thread)
1048 {
1049         unsigned long flags;
1050
1051         spin_lock_irqsave(&card->thread_mask_lock, flags);
1052         card->thread_start_mask &= ~thread;
1053         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1054         wake_up(&card->wait_q);
1055 }
1056
1057 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1058                                           unsigned long thread)
1059 {
1060         unsigned long flags;
1061
1062         spin_lock_irqsave(&card->thread_mask_lock, flags);
1063         card->thread_running_mask &= ~thread;
1064         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1065         wake_up_all(&card->wait_q);
1066 }
1067
1068 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1069 {
1070         unsigned long flags;
1071         int rc = 0;
1072
1073         spin_lock_irqsave(&card->thread_mask_lock, flags);
1074         if (card->thread_start_mask & thread) {
1075                 if ((card->thread_allowed_mask & thread) &&
1076                     !(card->thread_running_mask & thread)) {
1077                         rc = 1;
1078                         card->thread_start_mask &= ~thread;
1079                         card->thread_running_mask |= thread;
1080                 } else
1081                         rc = -EPERM;
1082         }
1083         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1084         return rc;
1085 }
1086
1087 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1088 {
1089         int rc = 0;
1090
1091         wait_event(card->wait_q,
1092                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1093         return rc;
1094 }
1095
1096 int qeth_schedule_recovery(struct qeth_card *card)
1097 {
1098         int rc;
1099
1100         QETH_CARD_TEXT(card, 2, "startrec");
1101
1102         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1103         if (!rc)
1104                 schedule_work(&card->kernel_thread_starter);
1105
1106         return rc;
1107 }
1108
1109 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1110                             struct irb *irb)
1111 {
1112         int dstat, cstat;
1113         char *sense;
1114
1115         sense = (char *) irb->ecw;
1116         cstat = irb->scsw.cmd.cstat;
1117         dstat = irb->scsw.cmd.dstat;
1118
1119         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1120                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1121                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1122                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1123                 dev_warn(&cdev->dev, "The qeth device driver "
1124                         "failed to recover an error on the device\n");
1125                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1126                                  CCW_DEVID(cdev), dstat, cstat);
1127                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1128                                 16, 1, irb, 64, 1);
1129                 return -EIO;
1130         }
1131
1132         if (dstat & DEV_STAT_UNIT_CHECK) {
1133                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1134                     SENSE_RESETTING_EVENT_FLAG) {
1135                         QETH_CARD_TEXT(card, 2, "REVIND");
1136                         return -EIO;
1137                 }
1138                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1139                     SENSE_COMMAND_REJECT_FLAG) {
1140                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1141                         return -EIO;
1142                 }
1143                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1144                         QETH_CARD_TEXT(card, 2, "AFFE");
1145                         return -EIO;
1146                 }
1147                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1148                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1149                         return 0;
1150                 }
1151                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1152                 return -EIO;
1153         }
1154         return 0;
1155 }
1156
1157 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1158                                 struct irb *irb)
1159 {
1160         if (!IS_ERR(irb))
1161                 return 0;
1162
1163         switch (PTR_ERR(irb)) {
1164         case -EIO:
1165                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1166                                  CCW_DEVID(cdev));
1167                 QETH_CARD_TEXT(card, 2, "ckirberr");
1168                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1169                 return -EIO;
1170         case -ETIMEDOUT:
1171                 dev_warn(&cdev->dev, "A hardware operation timed out"
1172                         " on the device\n");
1173                 QETH_CARD_TEXT(card, 2, "ckirberr");
1174                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1175                 return -ETIMEDOUT;
1176         default:
1177                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1178                                  PTR_ERR(irb), CCW_DEVID(cdev));
1179                 QETH_CARD_TEXT(card, 2, "ckirberr");
1180                 QETH_CARD_TEXT(card, 2, "  rc???");
1181                 return PTR_ERR(irb);
1182         }
1183 }
1184
1185 /**
1186  * qeth_irq() - qeth interrupt handler
1187  * @cdev: ccw device
1188  * @intparm: expect pointer to iob
1189  * @irb: Interruption Response Block
1190  *
1191  * In the good path:
1192  * corresponding qeth channel is locked with last used iob as active_cmd.
1193  * But this function is also called for error interrupts.
1194  *
1195  * Caller ensures that:
1196  * Interrupts are disabled; ccw device lock is held;
1197  *
1198  */
1199 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1200                 struct irb *irb)
1201 {
1202         int rc;
1203         int cstat, dstat;
1204         struct qeth_cmd_buffer *iob = NULL;
1205         struct ccwgroup_device *gdev;
1206         struct qeth_channel *channel;
1207         struct qeth_card *card;
1208
1209         /* while we hold the ccwdev lock, this stays valid: */
1210         gdev = dev_get_drvdata(&cdev->dev);
1211         card = dev_get_drvdata(&gdev->dev);
1212
1213         QETH_CARD_TEXT(card, 5, "irq");
1214
1215         if (card->read.ccwdev == cdev) {
1216                 channel = &card->read;
1217                 QETH_CARD_TEXT(card, 5, "read");
1218         } else if (card->write.ccwdev == cdev) {
1219                 channel = &card->write;
1220                 QETH_CARD_TEXT(card, 5, "write");
1221         } else {
1222                 channel = &card->data;
1223                 QETH_CARD_TEXT(card, 5, "data");
1224         }
1225
1226         if (intparm == 0) {
1227                 QETH_CARD_TEXT(card, 5, "irqunsol");
1228         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1229                 QETH_CARD_TEXT(card, 5, "irqunexp");
1230
1231                 dev_err(&cdev->dev,
1232                         "Received IRQ with intparm %lx, expected %px\n",
1233                         intparm, channel->active_cmd);
1234                 if (channel->active_cmd)
1235                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1236         } else {
1237                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1238         }
1239
1240         rc = qeth_check_irb_error(card, cdev, irb);
1241         if (rc) {
1242                 /* IO was terminated, free its resources. */
1243                 qeth_unlock_channel(card, channel);
1244                 if (iob)
1245                         qeth_cancel_cmd(iob, rc);
1246                 return;
1247         }
1248
1249         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1250                 channel->state = CH_STATE_STOPPED;
1251                 wake_up(&card->wait_q);
1252         }
1253
1254         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1255                 channel->state = CH_STATE_HALTED;
1256                 wake_up(&card->wait_q);
1257         }
1258
1259         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1260                                           SCSW_FCTL_HALT_FUNC))) {
1261                 qeth_cancel_cmd(iob, -ECANCELED);
1262                 iob = NULL;
1263         }
1264
1265         cstat = irb->scsw.cmd.cstat;
1266         dstat = irb->scsw.cmd.dstat;
1267
1268         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1269             (dstat & DEV_STAT_UNIT_CHECK) ||
1270             (cstat)) {
1271                 if (irb->esw.esw0.erw.cons) {
1272                         dev_warn(&channel->ccwdev->dev,
1273                                 "The qeth device driver failed to recover "
1274                                 "an error on the device\n");
1275                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1276                                          CCW_DEVID(channel->ccwdev), cstat,
1277                                          dstat);
1278                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1279                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1280                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1281                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1282                 }
1283
1284                 rc = qeth_get_problem(card, cdev, irb);
1285                 if (rc) {
1286                         card->read_or_write_problem = 1;
1287                         qeth_unlock_channel(card, channel);
1288                         if (iob)
1289                                 qeth_cancel_cmd(iob, rc);
1290                         qeth_clear_ipacmd_list(card);
1291                         qeth_schedule_recovery(card);
1292                         return;
1293                 }
1294         }
1295
1296         if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) {
1297                 /* channel command hasn't started: retry.
1298                  * active_cmd is still set to last iob
1299                  */
1300                 QETH_CARD_TEXT(card, 2, "irqcc1");
1301                 rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob),
1302                                               (addr_t)iob, 0, 0, iob->timeout);
1303                 if (rc) {
1304                         QETH_DBF_MESSAGE(2,
1305                                          "ccw retry on %x failed, rc = %i\n",
1306                                          CARD_DEVID(card), rc);
1307                         QETH_CARD_TEXT_(card, 2, " err%d", rc);
1308                         qeth_unlock_channel(card, channel);
1309                         qeth_cancel_cmd(iob, rc);
1310                 }
1311                 return;
1312         }
1313
1314         qeth_unlock_channel(card, channel);
1315
1316         if (iob) {
1317                 /* sanity check: */
1318                 if (irb->scsw.cmd.count > iob->length) {
1319                         qeth_cancel_cmd(iob, -EIO);
1320                         return;
1321                 }
1322                 if (iob->callback)
1323                         iob->callback(card, iob,
1324                                       iob->length - irb->scsw.cmd.count);
1325         }
1326 }
1327
1328 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1329                 struct qeth_qdio_out_buffer *buf,
1330                 enum iucv_tx_notify notification)
1331 {
1332         struct sk_buff *skb;
1333
1334         skb_queue_walk(&buf->skb_list, skb) {
1335                 struct sock *sk = skb->sk;
1336
1337                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1338                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1339                 if (sk && sk->sk_family == PF_IUCV)
1340                         iucv_sk(sk)->sk_txnotify(sk, notification);
1341         }
1342 }
1343
1344 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1345                                  struct qeth_qdio_out_buffer *buf, bool error,
1346                                  int budget)
1347 {
1348         struct sk_buff *skb;
1349
1350         /* Empty buffer? */
1351         if (buf->next_element_to_fill == 0)
1352                 return;
1353
1354         QETH_TXQ_STAT_INC(queue, bufs);
1355         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1356         if (error) {
1357                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1358         } else {
1359                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1360                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1361         }
1362
1363         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1364                 unsigned int bytes = qdisc_pkt_len(skb);
1365                 bool is_tso = skb_is_gso(skb);
1366                 unsigned int packets;
1367
1368                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1369                 if (!error) {
1370                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1371                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1372                         if (skb_is_nonlinear(skb))
1373                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1374                         if (is_tso) {
1375                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1376                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1377                         }
1378                 }
1379
1380                 napi_consume_skb(skb, budget);
1381         }
1382 }
1383
1384 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1385                                      struct qeth_qdio_out_buffer *buf,
1386                                      bool error, int budget)
1387 {
1388         int i;
1389
1390         /* is PCI flag set on buffer? */
1391         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1392                 atomic_dec(&queue->set_pci_flags_count);
1393                 QETH_TXQ_STAT_INC(queue, completion_irq);
1394         }
1395
1396         qeth_tx_complete_buf(queue, buf, error, budget);
1397
1398         for (i = 0; i < queue->max_elements; ++i) {
1399                 void *data = dma64_to_virt(buf->buffer->element[i].addr);
1400
1401                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1402                         kmem_cache_free(qeth_core_header_cache, data);
1403         }
1404
1405         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1406         buf->next_element_to_fill = 0;
1407         buf->frames = 0;
1408         buf->bytes = 0;
1409         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1410 }
1411
1412 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1413 {
1414         if (buf->aob)
1415                 kmem_cache_free(qeth_qaob_cache, buf->aob);
1416         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1417 }
1418
1419 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1420                                           struct qeth_qdio_out_q *queue,
1421                                           bool drain, int budget)
1422 {
1423         struct qeth_qdio_out_buffer *buf, *tmp;
1424
1425         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1426                 struct qeth_qaob_priv1 *priv;
1427                 struct qaob *aob = buf->aob;
1428                 enum iucv_tx_notify notify;
1429                 unsigned int i;
1430
1431                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1432                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1433                         QETH_CARD_TEXT(card, 5, "fp");
1434                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1435
1436                         notify = drain ? TX_NOTIFY_GENERALERROR :
1437                                          qeth_compute_cq_notification(aob->aorc, 1);
1438                         qeth_notify_skbs(queue, buf, notify);
1439                         qeth_tx_complete_buf(queue, buf, drain, budget);
1440
1441                         for (i = 0;
1442                              i < aob->sb_count && i < queue->max_elements;
1443                              i++) {
1444                                 void *data = dma64_to_virt(aob->sba[i]);
1445
1446                                 if (test_bit(i, buf->from_kmem_cache) && data)
1447                                         kmem_cache_free(qeth_core_header_cache,
1448                                                         data);
1449                         }
1450
1451                         list_del(&buf->list_entry);
1452                         qeth_free_out_buf(buf);
1453                 }
1454         }
1455 }
1456
1457 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1458 {
1459         int j;
1460
1461         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1462
1463         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1464                 if (!q->bufs[j])
1465                         continue;
1466
1467                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1468                 if (free) {
1469                         qeth_free_out_buf(q->bufs[j]);
1470                         q->bufs[j] = NULL;
1471                 }
1472         }
1473 }
1474
1475 static void qeth_drain_output_queues(struct qeth_card *card)
1476 {
1477         int i;
1478
1479         QETH_CARD_TEXT(card, 2, "clearqdbf");
1480         /* clear outbound buffers to free skbs */
1481         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1482                 if (card->qdio.out_qs[i])
1483                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1484         }
1485 }
1486
1487 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1488 {
1489         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1490
1491         if (card->qdio.no_out_queues == max)
1492                 return;
1493
1494         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1495                 qeth_free_qdio_queues(card);
1496
1497         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1498                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1499
1500         card->qdio.no_out_queues = max;
1501 }
1502
1503 static int qeth_update_from_chp_desc(struct qeth_card *card)
1504 {
1505         struct ccw_device *ccwdev;
1506         struct channel_path_desc_fmt0 *chp_dsc;
1507
1508         QETH_CARD_TEXT(card, 2, "chp_desc");
1509
1510         ccwdev = card->data.ccwdev;
1511         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1512         if (!chp_dsc)
1513                 return -ENOMEM;
1514
1515         card->info.func_level = 0x4100 + chp_dsc->desc;
1516
1517         if (IS_OSD(card) || IS_OSX(card))
1518                 /* CHPP field bit 6 == 1 -> single queue */
1519                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1520
1521         kfree(chp_dsc);
1522         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1523         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1524         return 0;
1525 }
1526
1527 static void qeth_init_qdio_info(struct qeth_card *card)
1528 {
1529         QETH_CARD_TEXT(card, 4, "intqdinf");
1530         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1531         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1532         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1533
1534         /* inbound */
1535         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1536         if (IS_IQD(card))
1537                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1538         else
1539                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1540         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1541         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1542         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1543 }
1544
1545 static void qeth_set_initial_options(struct qeth_card *card)
1546 {
1547         card->options.route4.type = NO_ROUTER;
1548         card->options.route6.type = NO_ROUTER;
1549         card->options.isolation = ISOLATION_MODE_NONE;
1550         card->options.cq = QETH_CQ_DISABLED;
1551         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1552 }
1553
1554 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1555 {
1556         unsigned long flags;
1557         int rc = 0;
1558
1559         spin_lock_irqsave(&card->thread_mask_lock, flags);
1560         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1561                         (u8) card->thread_start_mask,
1562                         (u8) card->thread_allowed_mask,
1563                         (u8) card->thread_running_mask);
1564         rc = (card->thread_start_mask & thread);
1565         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1566         return rc;
1567 }
1568
1569 static int qeth_do_reset(void *data);
1570 static void qeth_start_kernel_thread(struct work_struct *work)
1571 {
1572         struct task_struct *ts;
1573         struct qeth_card *card = container_of(work, struct qeth_card,
1574                                         kernel_thread_starter);
1575         QETH_CARD_TEXT(card, 2, "strthrd");
1576
1577         if (card->read.state != CH_STATE_UP &&
1578             card->write.state != CH_STATE_UP)
1579                 return;
1580         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1581                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1582                 if (IS_ERR(ts)) {
1583                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1584                         qeth_clear_thread_running_bit(card,
1585                                 QETH_RECOVER_THREAD);
1586                 }
1587         }
1588 }
1589
1590 static void qeth_buffer_reclaim_work(struct work_struct *);
1591 static void qeth_setup_card(struct qeth_card *card)
1592 {
1593         QETH_CARD_TEXT(card, 2, "setupcrd");
1594
1595         card->info.type = CARD_RDEV(card)->id.driver_info;
1596         card->state = CARD_STATE_DOWN;
1597         spin_lock_init(&card->lock);
1598         spin_lock_init(&card->thread_mask_lock);
1599         mutex_init(&card->conf_mutex);
1600         mutex_init(&card->discipline_mutex);
1601         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1602         INIT_LIST_HEAD(&card->cmd_waiter_list);
1603         init_waitqueue_head(&card->wait_q);
1604         qeth_set_initial_options(card);
1605         /* IP address takeover */
1606         INIT_LIST_HEAD(&card->ipato.entries);
1607         qeth_init_qdio_info(card);
1608         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1609         hash_init(card->rx_mode_addrs);
1610         hash_init(card->local_addrs4);
1611         hash_init(card->local_addrs6);
1612         spin_lock_init(&card->local_addrs4_lock);
1613         spin_lock_init(&card->local_addrs6_lock);
1614 }
1615
1616 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1617 {
1618         struct qeth_card *card = container_of(slr, struct qeth_card,
1619                                         qeth_service_level);
1620         if (card->info.mcl_level[0])
1621                 seq_printf(m, "qeth: %s firmware level %s\n",
1622                         CARD_BUS_ID(card), card->info.mcl_level);
1623 }
1624
1625 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1626 {
1627         struct qeth_card *card;
1628
1629         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1630         card = kzalloc(sizeof(*card), GFP_KERNEL);
1631         if (!card)
1632                 goto out;
1633         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1634
1635         card->gdev = gdev;
1636         dev_set_drvdata(&gdev->dev, card);
1637         CARD_RDEV(card) = gdev->cdev[0];
1638         CARD_WDEV(card) = gdev->cdev[1];
1639         CARD_DDEV(card) = gdev->cdev[2];
1640
1641         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1642                                                  dev_name(&gdev->dev));
1643         if (!card->event_wq)
1644                 goto out_wq;
1645
1646         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1647         if (!card->read_cmd)
1648                 goto out_read_cmd;
1649
1650         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1651                                            qeth_debugfs_root);
1652         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1653                             &qeth_debugfs_local_addr_fops);
1654
1655         card->qeth_service_level.seq_print = qeth_core_sl_print;
1656         register_service_level(&card->qeth_service_level);
1657         return card;
1658
1659 out_read_cmd:
1660         destroy_workqueue(card->event_wq);
1661 out_wq:
1662         dev_set_drvdata(&gdev->dev, NULL);
1663         kfree(card);
1664 out:
1665         return NULL;
1666 }
1667
1668 static int qeth_clear_channel(struct qeth_card *card,
1669                               struct qeth_channel *channel)
1670 {
1671         int rc;
1672
1673         QETH_CARD_TEXT(card, 3, "clearch");
1674         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1675         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1676         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1677
1678         if (rc)
1679                 return rc;
1680         rc = wait_event_interruptible_timeout(card->wait_q,
1681                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1682         if (rc == -ERESTARTSYS)
1683                 return rc;
1684         if (channel->state != CH_STATE_STOPPED)
1685                 return -ETIME;
1686         channel->state = CH_STATE_DOWN;
1687         return 0;
1688 }
1689
1690 static int qeth_halt_channel(struct qeth_card *card,
1691                              struct qeth_channel *channel)
1692 {
1693         int rc;
1694
1695         QETH_CARD_TEXT(card, 3, "haltch");
1696         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1697         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1698         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1699
1700         if (rc)
1701                 return rc;
1702         rc = wait_event_interruptible_timeout(card->wait_q,
1703                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1704         if (rc == -ERESTARTSYS)
1705                 return rc;
1706         if (channel->state != CH_STATE_HALTED)
1707                 return -ETIME;
1708         return 0;
1709 }
1710
1711 static int qeth_stop_channel(struct qeth_channel *channel)
1712 {
1713         struct ccw_device *cdev = channel->ccwdev;
1714         int rc;
1715
1716         rc = ccw_device_set_offline(cdev);
1717
1718         spin_lock_irq(get_ccwdev_lock(cdev));
1719         if (channel->active_cmd)
1720                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1721                         channel->active_cmd);
1722
1723         cdev->handler = NULL;
1724         spin_unlock_irq(get_ccwdev_lock(cdev));
1725
1726         return rc;
1727 }
1728
1729 static int qeth_start_channel(struct qeth_channel *channel)
1730 {
1731         struct ccw_device *cdev = channel->ccwdev;
1732         int rc;
1733
1734         channel->state = CH_STATE_DOWN;
1735         xchg(&channel->active_cmd, NULL);
1736
1737         spin_lock_irq(get_ccwdev_lock(cdev));
1738         cdev->handler = qeth_irq;
1739         spin_unlock_irq(get_ccwdev_lock(cdev));
1740
1741         rc = ccw_device_set_online(cdev);
1742         if (rc)
1743                 goto err;
1744
1745         return 0;
1746
1747 err:
1748         spin_lock_irq(get_ccwdev_lock(cdev));
1749         cdev->handler = NULL;
1750         spin_unlock_irq(get_ccwdev_lock(cdev));
1751         return rc;
1752 }
1753
1754 static int qeth_halt_channels(struct qeth_card *card)
1755 {
1756         int rc1 = 0, rc2 = 0, rc3 = 0;
1757
1758         QETH_CARD_TEXT(card, 3, "haltchs");
1759         rc1 = qeth_halt_channel(card, &card->read);
1760         rc2 = qeth_halt_channel(card, &card->write);
1761         rc3 = qeth_halt_channel(card, &card->data);
1762         if (rc1)
1763                 return rc1;
1764         if (rc2)
1765                 return rc2;
1766         return rc3;
1767 }
1768
1769 static int qeth_clear_channels(struct qeth_card *card)
1770 {
1771         int rc1 = 0, rc2 = 0, rc3 = 0;
1772
1773         QETH_CARD_TEXT(card, 3, "clearchs");
1774         rc1 = qeth_clear_channel(card, &card->read);
1775         rc2 = qeth_clear_channel(card, &card->write);
1776         rc3 = qeth_clear_channel(card, &card->data);
1777         if (rc1)
1778                 return rc1;
1779         if (rc2)
1780                 return rc2;
1781         return rc3;
1782 }
1783
1784 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1785 {
1786         int rc = 0;
1787
1788         QETH_CARD_TEXT(card, 3, "clhacrd");
1789
1790         if (halt)
1791                 rc = qeth_halt_channels(card);
1792         if (rc)
1793                 return rc;
1794         return qeth_clear_channels(card);
1795 }
1796
1797 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1798 {
1799         int rc = 0;
1800
1801         QETH_CARD_TEXT(card, 3, "qdioclr");
1802         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1803                 QETH_QDIO_CLEANING)) {
1804         case QETH_QDIO_ESTABLISHED:
1805                 if (IS_IQD(card))
1806                         rc = qdio_shutdown(CARD_DDEV(card),
1807                                 QDIO_FLAG_CLEANUP_USING_HALT);
1808                 else
1809                         rc = qdio_shutdown(CARD_DDEV(card),
1810                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1811                 if (rc)
1812                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1813                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1814                 break;
1815         case QETH_QDIO_CLEANING:
1816                 return rc;
1817         default:
1818                 break;
1819         }
1820         rc = qeth_clear_halt_card(card, use_halt);
1821         if (rc)
1822                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1823         return rc;
1824 }
1825
1826 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1827 {
1828         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1829         struct diag26c_vnic_resp *response = NULL;
1830         struct diag26c_vnic_req *request = NULL;
1831         struct ccw_dev_id id;
1832         char userid[80];
1833         int rc = 0;
1834
1835         QETH_CARD_TEXT(card, 2, "vmlayer");
1836
1837         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1838         if (rc)
1839                 goto out;
1840
1841         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1842         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1843         if (!request || !response) {
1844                 rc = -ENOMEM;
1845                 goto out;
1846         }
1847
1848         ccw_device_get_id(CARD_RDEV(card), &id);
1849         request->resp_buf_len = sizeof(*response);
1850         request->resp_version = DIAG26C_VERSION6_VM65918;
1851         request->req_format = DIAG26C_VNIC_INFO;
1852         ASCEBC(userid, 8);
1853         memcpy(&request->sys_name, userid, 8);
1854         request->devno = id.devno;
1855
1856         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1857         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1858         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1859         if (rc)
1860                 goto out;
1861         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1862
1863         if (request->resp_buf_len < sizeof(*response) ||
1864             response->version != request->resp_version) {
1865                 rc = -EIO;
1866                 goto out;
1867         }
1868
1869         if (response->protocol == VNIC_INFO_PROT_L2)
1870                 disc = QETH_DISCIPLINE_LAYER2;
1871         else if (response->protocol == VNIC_INFO_PROT_L3)
1872                 disc = QETH_DISCIPLINE_LAYER3;
1873
1874 out:
1875         kfree(response);
1876         kfree(request);
1877         if (rc)
1878                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1879         return disc;
1880 }
1881
1882 /* Determine whether the device requires a specific layer discipline */
1883 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1884 {
1885         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1886
1887         if (IS_OSM(card))
1888                 disc = QETH_DISCIPLINE_LAYER2;
1889         else if (IS_VM_NIC(card))
1890                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1891                                       qeth_vm_detect_layer(card);
1892
1893         switch (disc) {
1894         case QETH_DISCIPLINE_LAYER2:
1895                 QETH_CARD_TEXT(card, 3, "force l2");
1896                 break;
1897         case QETH_DISCIPLINE_LAYER3:
1898                 QETH_CARD_TEXT(card, 3, "force l3");
1899                 break;
1900         default:
1901                 QETH_CARD_TEXT(card, 3, "force no");
1902         }
1903
1904         return disc;
1905 }
1906
1907 static void qeth_set_blkt_defaults(struct qeth_card *card)
1908 {
1909         QETH_CARD_TEXT(card, 2, "cfgblkt");
1910
1911         if (card->info.use_v1_blkt) {
1912                 card->info.blkt.time_total = 0;
1913                 card->info.blkt.inter_packet = 0;
1914                 card->info.blkt.inter_packet_jumbo = 0;
1915         } else {
1916                 card->info.blkt.time_total = 250;
1917                 card->info.blkt.inter_packet = 5;
1918                 card->info.blkt.inter_packet_jumbo = 15;
1919         }
1920 }
1921
1922 static void qeth_idx_init(struct qeth_card *card)
1923 {
1924         memset(&card->seqno, 0, sizeof(card->seqno));
1925
1926         card->token.issuer_rm_w = 0x00010103UL;
1927         card->token.cm_filter_w = 0x00010108UL;
1928         card->token.cm_connection_w = 0x0001010aUL;
1929         card->token.ulp_filter_w = 0x0001010bUL;
1930         card->token.ulp_connection_w = 0x0001010dUL;
1931
1932         switch (card->info.type) {
1933         case QETH_CARD_TYPE_IQD:
1934                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1935                 break;
1936         case QETH_CARD_TYPE_OSD:
1937                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1938                 break;
1939         default:
1940                 break;
1941         }
1942 }
1943
1944 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1945                                   struct qeth_cmd_buffer *iob)
1946 {
1947         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1948                QETH_SEQ_NO_LENGTH);
1949         if (iob->channel == &card->write)
1950                 card->seqno.trans_hdr++;
1951 }
1952
1953 static int qeth_peer_func_level(int level)
1954 {
1955         if ((level & 0xff) == 8)
1956                 return (level & 0xff) + 0x400;
1957         if (((level >> 8) & 3) == 1)
1958                 return (level & 0xff) + 0x200;
1959         return level;
1960 }
1961
1962 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1963                                   struct qeth_cmd_buffer *iob)
1964 {
1965         qeth_idx_finalize_cmd(card, iob);
1966
1967         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1968                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1969         card->seqno.pdu_hdr++;
1970         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1971                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1972
1973         iob->callback = qeth_release_buffer_cb;
1974 }
1975
1976 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1977                                  struct qeth_cmd_buffer *reply)
1978 {
1979         /* MPC cmds are issued strictly in sequence. */
1980         return !IS_IPA(reply->data);
1981 }
1982
1983 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1984                                                   const void *data,
1985                                                   unsigned int data_length)
1986 {
1987         struct qeth_cmd_buffer *iob;
1988
1989         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1990         if (!iob)
1991                 return NULL;
1992
1993         memcpy(iob->data, data, data_length);
1994         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1995                        iob->data);
1996         iob->finalize = qeth_mpc_finalize_cmd;
1997         iob->match = qeth_mpc_match_reply;
1998         return iob;
1999 }
2000
2001 /**
2002  * qeth_send_control_data() -   send control command to the card
2003  * @card:                       qeth_card structure pointer
2004  * @iob:                        qeth_cmd_buffer pointer
2005  * @reply_cb:                   callback function pointer
2006  *  cb_card:                    pointer to the qeth_card structure
2007  *  cb_reply:                   pointer to the qeth_reply structure
2008  *  cb_cmd:                     pointer to the original iob for non-IPA
2009  *                              commands, or to the qeth_ipa_cmd structure
2010  *                              for the IPA commands.
2011  * @reply_param:                private pointer passed to the callback
2012  *
2013  * Callback function gets called one or more times, with cb_cmd
2014  * pointing to the response returned by the hardware. Callback
2015  * function must return
2016  *   > 0 if more reply blocks are expected,
2017  *     0 if the last or only reply block is received, and
2018  *   < 0 on error.
2019  * Callback function can get the value of the reply_param pointer from the
2020  * field 'param' of the structure qeth_reply.
2021  */
2022
2023 static int qeth_send_control_data(struct qeth_card *card,
2024                                   struct qeth_cmd_buffer *iob,
2025                                   int (*reply_cb)(struct qeth_card *cb_card,
2026                                                   struct qeth_reply *cb_reply,
2027                                                   unsigned long cb_cmd),
2028                                   void *reply_param)
2029 {
2030         struct qeth_channel *channel = iob->channel;
2031         struct qeth_reply *reply = &iob->reply;
2032         long timeout = iob->timeout;
2033         int rc;
2034
2035         QETH_CARD_TEXT(card, 2, "sendctl");
2036
2037         reply->callback = reply_cb;
2038         reply->param = reply_param;
2039
2040         timeout = wait_event_interruptible_timeout(card->wait_q,
2041                                                    qeth_trylock_channel(channel, iob),
2042                                                    timeout);
2043         if (timeout <= 0) {
2044                 qeth_put_cmd(iob);
2045                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2046         }
2047
2048         if (iob->finalize)
2049                 iob->finalize(card, iob);
2050         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2051
2052         qeth_enqueue_cmd(card, iob);
2053
2054         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2055         qeth_get_cmd(iob);
2056
2057         QETH_CARD_TEXT(card, 6, "noirqpnd");
2058         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2059         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2060                                       (addr_t) iob, 0, 0, timeout);
2061         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2062         if (rc) {
2063                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2064                                  CARD_DEVID(card), rc);
2065                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2066                 qeth_dequeue_cmd(card, iob);
2067                 qeth_put_cmd(iob);
2068                 qeth_unlock_channel(card, channel);
2069                 goto out;
2070         }
2071
2072         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2073                                                             timeout);
2074         if (timeout <= 0)
2075                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2076
2077         qeth_dequeue_cmd(card, iob);
2078
2079         if (reply_cb) {
2080                 /* Wait until the callback for a late reply has completed: */
2081                 spin_lock_irq(&iob->lock);
2082                 if (rc)
2083                         /* Zap any callback that's still pending: */
2084                         iob->rc = rc;
2085                 spin_unlock_irq(&iob->lock);
2086         }
2087
2088         if (!rc)
2089                 rc = iob->rc;
2090
2091 out:
2092         qeth_put_cmd(iob);
2093         return rc;
2094 }
2095
2096 struct qeth_node_desc {
2097         struct node_descriptor nd1;
2098         struct node_descriptor nd2;
2099         struct node_descriptor nd3;
2100 };
2101
2102 static void qeth_read_conf_data_cb(struct qeth_card *card,
2103                                    struct qeth_cmd_buffer *iob,
2104                                    unsigned int data_length)
2105 {
2106         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2107         int rc = 0;
2108         u8 *tag;
2109
2110         QETH_CARD_TEXT(card, 2, "cfgunit");
2111
2112         if (data_length < sizeof(*nd)) {
2113                 rc = -EINVAL;
2114                 goto out;
2115         }
2116
2117         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2118                                nd->nd1.plant[1] == _ascebc['M'];
2119         tag = (u8 *)&nd->nd1.tag;
2120         card->info.chpid = tag[0];
2121         card->info.unit_addr2 = tag[1];
2122
2123         tag = (u8 *)&nd->nd2.tag;
2124         card->info.cula = tag[1];
2125
2126         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2127                                  nd->nd3.model[1] == 0xF0 &&
2128                                  nd->nd3.model[2] >= 0xF1 &&
2129                                  nd->nd3.model[2] <= 0xF4;
2130
2131 out:
2132         qeth_notify_cmd(iob, rc);
2133         qeth_put_cmd(iob);
2134 }
2135
2136 static int qeth_read_conf_data(struct qeth_card *card)
2137 {
2138         struct qeth_channel *channel = &card->data;
2139         struct qeth_cmd_buffer *iob;
2140         struct ciw *ciw;
2141
2142         /* scan for RCD command in extended SenseID data */
2143         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2144         if (!ciw || ciw->cmd == 0)
2145                 return -EOPNOTSUPP;
2146         if (ciw->count < sizeof(struct qeth_node_desc))
2147                 return -EINVAL;
2148
2149         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2150         if (!iob)
2151                 return -ENOMEM;
2152
2153         iob->callback = qeth_read_conf_data_cb;
2154         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2155                        iob->data);
2156
2157         return qeth_send_control_data(card, iob, NULL, NULL);
2158 }
2159
2160 static int qeth_idx_check_activate_response(struct qeth_card *card,
2161                                             struct qeth_channel *channel,
2162                                             struct qeth_cmd_buffer *iob)
2163 {
2164         int rc;
2165
2166         rc = qeth_check_idx_response(card, iob->data);
2167         if (rc)
2168                 return rc;
2169
2170         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2171                 return 0;
2172
2173         /* negative reply: */
2174         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2175                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2176
2177         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2178         case QETH_IDX_ACT_ERR_EXCL:
2179                 dev_err(&channel->ccwdev->dev,
2180                         "The adapter is used exclusively by another host\n");
2181                 return -EBUSY;
2182         case QETH_IDX_ACT_ERR_AUTH:
2183         case QETH_IDX_ACT_ERR_AUTH_USER:
2184                 dev_err(&channel->ccwdev->dev,
2185                         "Setting the device online failed because of insufficient authorization\n");
2186                 return -EPERM;
2187         default:
2188                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2189                                  CCW_DEVID(channel->ccwdev));
2190                 return -EIO;
2191         }
2192 }
2193
2194 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2195                                               struct qeth_cmd_buffer *iob,
2196                                               unsigned int data_length)
2197 {
2198         struct qeth_channel *channel = iob->channel;
2199         u16 peer_level;
2200         int rc;
2201
2202         QETH_CARD_TEXT(card, 2, "idxrdcb");
2203
2204         rc = qeth_idx_check_activate_response(card, channel, iob);
2205         if (rc)
2206                 goto out;
2207
2208         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2209         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2210                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2211                                  CCW_DEVID(channel->ccwdev),
2212                                  card->info.func_level, peer_level);
2213                 rc = -EINVAL;
2214                 goto out;
2215         }
2216
2217         memcpy(&card->token.issuer_rm_r,
2218                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2219                QETH_MPC_TOKEN_LENGTH);
2220         memcpy(&card->info.mcl_level[0],
2221                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2222
2223 out:
2224         qeth_notify_cmd(iob, rc);
2225         qeth_put_cmd(iob);
2226 }
2227
2228 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2229                                                struct qeth_cmd_buffer *iob,
2230                                                unsigned int data_length)
2231 {
2232         struct qeth_channel *channel = iob->channel;
2233         u16 peer_level;
2234         int rc;
2235
2236         QETH_CARD_TEXT(card, 2, "idxwrcb");
2237
2238         rc = qeth_idx_check_activate_response(card, channel, iob);
2239         if (rc)
2240                 goto out;
2241
2242         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2243         if ((peer_level & ~0x0100) !=
2244             qeth_peer_func_level(card->info.func_level)) {
2245                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2246                                  CCW_DEVID(channel->ccwdev),
2247                                  card->info.func_level, peer_level);
2248                 rc = -EINVAL;
2249         }
2250
2251 out:
2252         qeth_notify_cmd(iob, rc);
2253         qeth_put_cmd(iob);
2254 }
2255
2256 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2257                                         struct qeth_cmd_buffer *iob)
2258 {
2259         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2260         u8 port = ((u8)card->dev->dev_port) | 0x80;
2261         struct ccw1 *ccw = __ccw_from_cmd(iob);
2262
2263         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2264                        iob->data);
2265         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2266         iob->finalize = qeth_idx_finalize_cmd;
2267
2268         port |= QETH_IDX_ACT_INVAL_FRAME;
2269         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2270         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2271                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2272         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2273                &card->info.func_level, 2);
2274         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2275         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2276 }
2277
2278 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2279 {
2280         struct qeth_channel *channel = &card->read;
2281         struct qeth_cmd_buffer *iob;
2282         int rc;
2283
2284         QETH_CARD_TEXT(card, 2, "idxread");
2285
2286         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2287         if (!iob)
2288                 return -ENOMEM;
2289
2290         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2291         qeth_idx_setup_activate_cmd(card, iob);
2292         iob->callback = qeth_idx_activate_read_channel_cb;
2293
2294         rc = qeth_send_control_data(card, iob, NULL, NULL);
2295         if (rc)
2296                 return rc;
2297
2298         channel->state = CH_STATE_UP;
2299         return 0;
2300 }
2301
2302 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2303 {
2304         struct qeth_channel *channel = &card->write;
2305         struct qeth_cmd_buffer *iob;
2306         int rc;
2307
2308         QETH_CARD_TEXT(card, 2, "idxwrite");
2309
2310         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2311         if (!iob)
2312                 return -ENOMEM;
2313
2314         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2315         qeth_idx_setup_activate_cmd(card, iob);
2316         iob->callback = qeth_idx_activate_write_channel_cb;
2317
2318         rc = qeth_send_control_data(card, iob, NULL, NULL);
2319         if (rc)
2320                 return rc;
2321
2322         channel->state = CH_STATE_UP;
2323         return 0;
2324 }
2325
2326 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2327                 unsigned long data)
2328 {
2329         struct qeth_cmd_buffer *iob;
2330
2331         QETH_CARD_TEXT(card, 2, "cmenblcb");
2332
2333         iob = (struct qeth_cmd_buffer *) data;
2334         memcpy(&card->token.cm_filter_r,
2335                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2336                QETH_MPC_TOKEN_LENGTH);
2337         return 0;
2338 }
2339
2340 static int qeth_cm_enable(struct qeth_card *card)
2341 {
2342         struct qeth_cmd_buffer *iob;
2343
2344         QETH_CARD_TEXT(card, 2, "cmenable");
2345
2346         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2347         if (!iob)
2348                 return -ENOMEM;
2349
2350         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2351                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2352         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2353                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2354
2355         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2356 }
2357
2358 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2359                 unsigned long data)
2360 {
2361         struct qeth_cmd_buffer *iob;
2362
2363         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2364
2365         iob = (struct qeth_cmd_buffer *) data;
2366         memcpy(&card->token.cm_connection_r,
2367                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2368                QETH_MPC_TOKEN_LENGTH);
2369         return 0;
2370 }
2371
2372 static int qeth_cm_setup(struct qeth_card *card)
2373 {
2374         struct qeth_cmd_buffer *iob;
2375
2376         QETH_CARD_TEXT(card, 2, "cmsetup");
2377
2378         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2379         if (!iob)
2380                 return -ENOMEM;
2381
2382         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2383                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2384         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2385                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2386         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2387                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2388         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2389 }
2390
2391 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2392 {
2393         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2394             link_type == QETH_LINK_TYPE_HSTR) {
2395                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2396                 return false;
2397         }
2398
2399         return true;
2400 }
2401
2402 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2403 {
2404         struct net_device *dev = card->dev;
2405         unsigned int new_mtu;
2406
2407         if (!max_mtu) {
2408                 /* IQD needs accurate max MTU to set up its RX buffers: */
2409                 if (IS_IQD(card))
2410                         return -EINVAL;
2411                 /* tolerate quirky HW: */
2412                 max_mtu = ETH_MAX_MTU;
2413         }
2414
2415         rtnl_lock();
2416         if (IS_IQD(card)) {
2417                 /* move any device with default MTU to new max MTU: */
2418                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2419
2420                 /* adjust RX buffer size to new max MTU: */
2421                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2422                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2423                         qeth_free_qdio_queues(card);
2424         } else {
2425                 if (dev->mtu)
2426                         new_mtu = dev->mtu;
2427                 /* default MTUs for first setup: */
2428                 else if (IS_LAYER2(card))
2429                         new_mtu = ETH_DATA_LEN;
2430                 else
2431                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2432         }
2433
2434         dev->max_mtu = max_mtu;
2435         dev->mtu = min(new_mtu, max_mtu);
2436         rtnl_unlock();
2437         return 0;
2438 }
2439
2440 static int qeth_get_mtu_outof_framesize(int framesize)
2441 {
2442         switch (framesize) {
2443         case 0x4000:
2444                 return 8192;
2445         case 0x6000:
2446                 return 16384;
2447         case 0xa000:
2448                 return 32768;
2449         case 0xffff:
2450                 return 57344;
2451         default:
2452                 return 0;
2453         }
2454 }
2455
2456 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2457                 unsigned long data)
2458 {
2459         __u16 mtu, framesize;
2460         __u16 len;
2461         struct qeth_cmd_buffer *iob;
2462         u8 link_type = 0;
2463
2464         QETH_CARD_TEXT(card, 2, "ulpenacb");
2465
2466         iob = (struct qeth_cmd_buffer *) data;
2467         memcpy(&card->token.ulp_filter_r,
2468                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2469                QETH_MPC_TOKEN_LENGTH);
2470         if (IS_IQD(card)) {
2471                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2472                 mtu = qeth_get_mtu_outof_framesize(framesize);
2473         } else {
2474                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2475         }
2476         *(u16 *)reply->param = mtu;
2477
2478         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2479         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2480                 memcpy(&link_type,
2481                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2482                 if (!qeth_is_supported_link_type(card, link_type))
2483                         return -EPROTONOSUPPORT;
2484         }
2485
2486         card->info.link_type = link_type;
2487         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2488         return 0;
2489 }
2490
2491 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2492 {
2493         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2494 }
2495
2496 static int qeth_ulp_enable(struct qeth_card *card)
2497 {
2498         u8 prot_type = qeth_mpc_select_prot_type(card);
2499         struct qeth_cmd_buffer *iob;
2500         u16 max_mtu;
2501         int rc;
2502
2503         QETH_CARD_TEXT(card, 2, "ulpenabl");
2504
2505         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2506         if (!iob)
2507                 return -ENOMEM;
2508
2509         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2510         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2511         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2512                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2513         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2514                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2515         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2516         if (rc)
2517                 return rc;
2518         return qeth_update_max_mtu(card, max_mtu);
2519 }
2520
2521 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2522                 unsigned long data)
2523 {
2524         struct qeth_cmd_buffer *iob;
2525
2526         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2527
2528         iob = (struct qeth_cmd_buffer *) data;
2529         memcpy(&card->token.ulp_connection_r,
2530                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2531                QETH_MPC_TOKEN_LENGTH);
2532         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2533                      3)) {
2534                 QETH_CARD_TEXT(card, 2, "olmlimit");
2535                 dev_err(&card->gdev->dev, "A connection could not be "
2536                         "established because of an OLM limit\n");
2537                 return -EMLINK;
2538         }
2539         return 0;
2540 }
2541
2542 static int qeth_ulp_setup(struct qeth_card *card)
2543 {
2544         __u16 temp;
2545         struct qeth_cmd_buffer *iob;
2546
2547         QETH_CARD_TEXT(card, 2, "ulpsetup");
2548
2549         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2550         if (!iob)
2551                 return -ENOMEM;
2552
2553         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2554                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2555         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2556                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2557         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2558                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2559
2560         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2561         temp = (card->info.cula << 8) + card->info.unit_addr2;
2562         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2563         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2564 }
2565
2566 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2567                               gfp_t gfp)
2568 {
2569         struct qeth_qdio_out_buffer *newbuf;
2570
2571         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2572         if (!newbuf)
2573                 return -ENOMEM;
2574
2575         newbuf->buffer = q->qdio_bufs[bidx];
2576         skb_queue_head_init(&newbuf->skb_list);
2577         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2578         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2579         q->bufs[bidx] = newbuf;
2580         return 0;
2581 }
2582
2583 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2584 {
2585         if (!q)
2586                 return;
2587
2588         qeth_drain_output_queue(q, true);
2589         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2590         kfree(q);
2591 }
2592
2593 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2594 {
2595         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2596         unsigned int i;
2597
2598         if (!q)
2599                 return NULL;
2600
2601         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2602                 goto err_qdio_bufs;
2603
2604         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2605                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2606                         goto err_out_bufs;
2607         }
2608
2609         return q;
2610
2611 err_out_bufs:
2612         while (i > 0)
2613                 qeth_free_out_buf(q->bufs[--i]);
2614         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2615 err_qdio_bufs:
2616         kfree(q);
2617         return NULL;
2618 }
2619
2620 static void qeth_tx_completion_timer(struct timer_list *timer)
2621 {
2622         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2623
2624         napi_schedule(&queue->napi);
2625         QETH_TXQ_STAT_INC(queue, completion_timer);
2626 }
2627
2628 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2629 {
2630         unsigned int i;
2631
2632         QETH_CARD_TEXT(card, 2, "allcqdbf");
2633
2634         /* completion */
2635         if (qeth_alloc_cq(card))
2636                 goto out_err;
2637
2638         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2639                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2640                 return 0;
2641
2642         /* inbound buffer pool */
2643         if (qeth_alloc_buffer_pool(card))
2644                 goto out_buffer_pool;
2645
2646         /* outbound */
2647         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2648                 struct qeth_qdio_out_q *queue;
2649
2650                 queue = qeth_alloc_output_queue();
2651                 if (!queue)
2652                         goto out_freeoutq;
2653                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2654                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2655                 card->qdio.out_qs[i] = queue;
2656                 queue->card = card;
2657                 queue->queue_no = i;
2658                 INIT_LIST_HEAD(&queue->pending_bufs);
2659                 spin_lock_init(&queue->lock);
2660                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2661                 if (IS_IQD(card)) {
2662                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2663                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2664                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2665                 } else {
2666                         queue->coalesce_usecs = USEC_PER_SEC;
2667                         queue->max_coalesced_frames = 0;
2668                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2669                 }
2670                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2671         }
2672
2673         return 0;
2674
2675 out_freeoutq:
2676         while (i > 0) {
2677                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2678                 card->qdio.out_qs[i] = NULL;
2679         }
2680         qeth_free_buffer_pool(card);
2681 out_buffer_pool:
2682         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2683         qeth_free_cq(card);
2684 out_err:
2685         return -ENOMEM;
2686 }
2687
2688 static void qeth_free_qdio_queues(struct qeth_card *card)
2689 {
2690         int i, j;
2691
2692         qeth_free_cq(card);
2693
2694         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2695                 QETH_QDIO_UNINITIALIZED)
2696                 return;
2697
2698         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2699                 if (card->qdio.in_q->bufs[j].rx_skb) {
2700                         consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2701                         card->qdio.in_q->bufs[j].rx_skb = NULL;
2702                 }
2703         }
2704
2705         /* inbound buffer pool */
2706         qeth_free_buffer_pool(card);
2707         /* free outbound qdio_qs */
2708         for (i = 0; i < card->qdio.no_out_queues; i++) {
2709                 qeth_free_output_queue(card->qdio.out_qs[i]);
2710                 card->qdio.out_qs[i] = NULL;
2711         }
2712 }
2713
2714 static void qeth_fill_qib_parms(struct qeth_card *card,
2715                                 struct qeth_qib_parms *parms)
2716 {
2717         struct qeth_qdio_out_q *queue;
2718         unsigned int i;
2719
2720         parms->pcit_magic[0] = 'P';
2721         parms->pcit_magic[1] = 'C';
2722         parms->pcit_magic[2] = 'I';
2723         parms->pcit_magic[3] = 'T';
2724         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2725         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2726         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2727         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2728
2729         parms->blkt_magic[0] = 'B';
2730         parms->blkt_magic[1] = 'L';
2731         parms->blkt_magic[2] = 'K';
2732         parms->blkt_magic[3] = 'T';
2733         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2734         parms->blkt_total = card->info.blkt.time_total;
2735         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2736         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2737
2738         /* Prio-queueing implicitly uses the default priorities: */
2739         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2740                 return;
2741
2742         parms->pque_magic[0] = 'P';
2743         parms->pque_magic[1] = 'Q';
2744         parms->pque_magic[2] = 'U';
2745         parms->pque_magic[3] = 'E';
2746         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2747         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2748         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2749
2750         qeth_for_each_output_queue(card, queue, i)
2751                 parms->pque_priority[i] = queue->priority;
2752 }
2753
2754 static int qeth_qdio_activate(struct qeth_card *card)
2755 {
2756         QETH_CARD_TEXT(card, 3, "qdioact");
2757         return qdio_activate(CARD_DDEV(card));
2758 }
2759
2760 static int qeth_dm_act(struct qeth_card *card)
2761 {
2762         struct qeth_cmd_buffer *iob;
2763
2764         QETH_CARD_TEXT(card, 2, "dmact");
2765
2766         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2767         if (!iob)
2768                 return -ENOMEM;
2769
2770         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2771                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2772         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2773                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2774         return qeth_send_control_data(card, iob, NULL, NULL);
2775 }
2776
2777 static int qeth_mpc_initialize(struct qeth_card *card)
2778 {
2779         int rc;
2780
2781         QETH_CARD_TEXT(card, 2, "mpcinit");
2782
2783         rc = qeth_issue_next_read(card);
2784         if (rc) {
2785                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2786                 return rc;
2787         }
2788         rc = qeth_cm_enable(card);
2789         if (rc) {
2790                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2791                 return rc;
2792         }
2793         rc = qeth_cm_setup(card);
2794         if (rc) {
2795                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2796                 return rc;
2797         }
2798         rc = qeth_ulp_enable(card);
2799         if (rc) {
2800                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2801                 return rc;
2802         }
2803         rc = qeth_ulp_setup(card);
2804         if (rc) {
2805                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2806                 return rc;
2807         }
2808         rc = qeth_alloc_qdio_queues(card);
2809         if (rc) {
2810                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2811                 return rc;
2812         }
2813         rc = qeth_qdio_establish(card);
2814         if (rc) {
2815                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2816                 qeth_free_qdio_queues(card);
2817                 return rc;
2818         }
2819         rc = qeth_qdio_activate(card);
2820         if (rc) {
2821                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2822                 return rc;
2823         }
2824         rc = qeth_dm_act(card);
2825         if (rc) {
2826                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2827                 return rc;
2828         }
2829
2830         return 0;
2831 }
2832
2833 static void qeth_print_status_message(struct qeth_card *card)
2834 {
2835         switch (card->info.type) {
2836         case QETH_CARD_TYPE_OSD:
2837         case QETH_CARD_TYPE_OSM:
2838         case QETH_CARD_TYPE_OSX:
2839                 /* VM will use a non-zero first character
2840                  * to indicate a HiperSockets like reporting
2841                  * of the level OSA sets the first character to zero
2842                  * */
2843                 if (!card->info.mcl_level[0]) {
2844                         scnprintf(card->info.mcl_level,
2845                                   sizeof(card->info.mcl_level),
2846                                   "%02x%02x",
2847                                   card->info.mcl_level[2],
2848                                   card->info.mcl_level[3]);
2849                         break;
2850                 }
2851                 fallthrough;
2852         case QETH_CARD_TYPE_IQD:
2853                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2854                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2855                                 card->info.mcl_level[0]];
2856                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2857                                 card->info.mcl_level[1]];
2858                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2859                                 card->info.mcl_level[2]];
2860                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2861                                 card->info.mcl_level[3]];
2862                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2863                 }
2864                 break;
2865         default:
2866                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2867         }
2868         dev_info(&card->gdev->dev,
2869                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2870                  qeth_get_cardname(card),
2871                  (card->info.mcl_level[0]) ? " (level: " : "",
2872                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2873                  (card->info.mcl_level[0]) ? ")" : "",
2874                  qeth_get_cardname_short(card));
2875 }
2876
2877 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2878 {
2879         struct qeth_buffer_pool_entry *entry;
2880
2881         QETH_CARD_TEXT(card, 5, "inwrklst");
2882
2883         list_for_each_entry(entry,
2884                             &card->qdio.init_pool.entry_list, init_list) {
2885                 qeth_put_buffer_pool_entry(card, entry);
2886         }
2887 }
2888
2889 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2890                                         struct qeth_card *card)
2891 {
2892         struct qeth_buffer_pool_entry *entry;
2893         int i, free;
2894
2895         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2896                 return NULL;
2897
2898         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2899                 free = 1;
2900                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2901                         if (page_count(entry->elements[i]) > 1) {
2902                                 free = 0;
2903                                 break;
2904                         }
2905                 }
2906                 if (free) {
2907                         list_del_init(&entry->list);
2908                         return entry;
2909                 }
2910         }
2911
2912         /* no free buffer in pool so take first one and swap pages */
2913         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2914                                  struct qeth_buffer_pool_entry, list);
2915         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2916                 if (page_count(entry->elements[i]) > 1) {
2917                         struct page *page = dev_alloc_page();
2918
2919                         if (!page)
2920                                 return NULL;
2921
2922                         __free_page(entry->elements[i]);
2923                         entry->elements[i] = page;
2924                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2925                 }
2926         }
2927         list_del_init(&entry->list);
2928         return entry;
2929 }
2930
2931 static int qeth_init_input_buffer(struct qeth_card *card,
2932                 struct qeth_qdio_buffer *buf)
2933 {
2934         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2935         int i;
2936
2937         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2938                 buf->rx_skb = netdev_alloc_skb(card->dev,
2939                                                ETH_HLEN +
2940                                                sizeof(struct ipv6hdr));
2941                 if (!buf->rx_skb)
2942                         return -ENOMEM;
2943         }
2944
2945         if (!pool_entry) {
2946                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2947                 if (!pool_entry)
2948                         return -ENOBUFS;
2949
2950                 buf->pool_entry = pool_entry;
2951         }
2952
2953         /*
2954          * since the buffer is accessed only from the input_tasklet
2955          * there shouldn't be a need to synchronize; also, since we use
2956          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2957          * buffers
2958          */
2959         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2960                 buf->buffer->element[i].length = PAGE_SIZE;
2961                 buf->buffer->element[i].addr = u64_to_dma64(
2962                         page_to_phys(pool_entry->elements[i]));
2963                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2964                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2965                 else
2966                         buf->buffer->element[i].eflags = 0;
2967                 buf->buffer->element[i].sflags = 0;
2968         }
2969         return 0;
2970 }
2971
2972 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2973                                             struct qeth_qdio_out_q *queue)
2974 {
2975         if (!IS_IQD(card) ||
2976             qeth_iqd_is_mcast_queue(card, queue) ||
2977             card->options.cq == QETH_CQ_ENABLED ||
2978             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2979                 return 1;
2980
2981         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2982 }
2983
2984 static int qeth_init_qdio_queues(struct qeth_card *card)
2985 {
2986         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2987         unsigned int i;
2988         int rc;
2989
2990         QETH_CARD_TEXT(card, 2, "initqdqs");
2991
2992         /* inbound queue */
2993         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2994         memset(&card->rx, 0, sizeof(struct qeth_rx));
2995
2996         qeth_initialize_working_pool_list(card);
2997         /*give only as many buffers to hardware as we have buffer pool entries*/
2998         for (i = 0; i < rx_bufs; i++) {
2999                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
3000                 if (rc)
3001                         return rc;
3002         }
3003
3004         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
3005         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
3006         if (rc) {
3007                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3008                 return rc;
3009         }
3010
3011         /* completion */
3012         rc = qeth_cq_init(card);
3013         if (rc) {
3014                 return rc;
3015         }
3016
3017         /* outbound queue */
3018         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3019                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3020
3021                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3022                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3023                 queue->next_buf_to_fill = 0;
3024                 queue->do_pack = 0;
3025                 queue->prev_hdr = NULL;
3026                 queue->coalesced_frames = 0;
3027                 queue->bulk_start = 0;
3028                 queue->bulk_count = 0;
3029                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3030                 atomic_set(&queue->used_buffers, 0);
3031                 atomic_set(&queue->set_pci_flags_count, 0);
3032                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3033         }
3034         return 0;
3035 }
3036
3037 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3038                                   struct qeth_cmd_buffer *iob)
3039 {
3040         qeth_mpc_finalize_cmd(card, iob);
3041
3042         /* override with IPA-specific values: */
3043         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3044 }
3045
3046 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
3047                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
3048 {
3049         u8 prot_type = qeth_mpc_select_prot_type(card);
3050         u16 total_length = iob->length;
3051
3052         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3053                        iob->data);
3054         iob->finalize = qeth_ipa_finalize_cmd;
3055
3056         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3057         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3058         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3059         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3060         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3061         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3062                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3063         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3064 }
3065
3066 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3067                                  struct qeth_cmd_buffer *reply)
3068 {
3069         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3070
3071         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3072 }
3073
3074 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3075                                            enum qeth_ipa_cmds cmd_code,
3076                                            enum qeth_prot_versions prot,
3077                                            unsigned int data_length)
3078 {
3079         struct qeth_cmd_buffer *iob;
3080         struct qeth_ipacmd_hdr *hdr;
3081
3082         data_length += offsetof(struct qeth_ipa_cmd, data);
3083         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3084                              QETH_IPA_TIMEOUT);
3085         if (!iob)
3086                 return NULL;
3087
3088         qeth_prepare_ipa_cmd(card, iob, data_length);
3089         iob->match = qeth_ipa_match_reply;
3090
3091         hdr = &__ipa_cmd(iob)->hdr;
3092         hdr->command = cmd_code;
3093         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3094         /* hdr->seqno is set by qeth_send_control_data() */
3095         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3096         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3097         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3098         hdr->param_count = 1;
3099         hdr->prot_version = prot;
3100         return iob;
3101 }
3102 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3103
3104 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3105                                 struct qeth_reply *reply, unsigned long data)
3106 {
3107         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3108
3109         return (cmd->hdr.return_code) ? -EIO : 0;
3110 }
3111
3112 /*
3113  * qeth_send_ipa_cmd() - send an IPA command
3114  *
3115  * See qeth_send_control_data() for explanation of the arguments.
3116  */
3117
3118 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3119                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3120                         unsigned long),
3121                 void *reply_param)
3122 {
3123         int rc;
3124
3125         QETH_CARD_TEXT(card, 4, "sendipa");
3126
3127         if (card->read_or_write_problem) {
3128                 qeth_put_cmd(iob);
3129                 return -EIO;
3130         }
3131
3132         if (reply_cb == NULL)
3133                 reply_cb = qeth_send_ipa_cmd_cb;
3134         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3135         if (rc == -ETIME) {
3136                 qeth_clear_ipacmd_list(card);
3137                 qeth_schedule_recovery(card);
3138         }
3139         return rc;
3140 }
3141 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3142
3143 static int qeth_send_startlan_cb(struct qeth_card *card,
3144                                  struct qeth_reply *reply, unsigned long data)
3145 {
3146         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3147
3148         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3149                 return -ENETDOWN;
3150
3151         return (cmd->hdr.return_code) ? -EIO : 0;
3152 }
3153
3154 static int qeth_send_startlan(struct qeth_card *card)
3155 {
3156         struct qeth_cmd_buffer *iob;
3157
3158         QETH_CARD_TEXT(card, 2, "strtlan");
3159
3160         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3161         if (!iob)
3162                 return -ENOMEM;
3163         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3164 }
3165
3166 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3167 {
3168         if (!cmd->hdr.return_code)
3169                 cmd->hdr.return_code =
3170                         cmd->data.setadapterparms.hdr.return_code;
3171         return cmd->hdr.return_code;
3172 }
3173
3174 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3175                 struct qeth_reply *reply, unsigned long data)
3176 {
3177         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3178         struct qeth_query_cmds_supp *query_cmd;
3179
3180         QETH_CARD_TEXT(card, 3, "quyadpcb");
3181         if (qeth_setadpparms_inspect_rc(cmd))
3182                 return -EIO;
3183
3184         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3185         if (query_cmd->lan_type & 0x7f) {
3186                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3187                         return -EPROTONOSUPPORT;
3188
3189                 card->info.link_type = query_cmd->lan_type;
3190                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3191         }
3192
3193         card->options.adp.supported = query_cmd->supported_cmds;
3194         return 0;
3195 }
3196
3197 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3198                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3199                                                     unsigned int data_length)
3200 {
3201         struct qeth_ipacmd_setadpparms_hdr *hdr;
3202         struct qeth_cmd_buffer *iob;
3203
3204         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3205                                  data_length +
3206                                  offsetof(struct qeth_ipacmd_setadpparms,
3207                                           data));
3208         if (!iob)
3209                 return NULL;
3210
3211         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3212         hdr->cmdlength = sizeof(*hdr) + data_length;
3213         hdr->command_code = adp_cmd;
3214         hdr->used_total = 1;
3215         hdr->seq_no = 1;
3216         return iob;
3217 }
3218
3219 static int qeth_query_setadapterparms(struct qeth_card *card)
3220 {
3221         int rc;
3222         struct qeth_cmd_buffer *iob;
3223
3224         QETH_CARD_TEXT(card, 3, "queryadp");
3225         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3226                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3227         if (!iob)
3228                 return -ENOMEM;
3229         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3230         return rc;
3231 }
3232
3233 static int qeth_query_ipassists_cb(struct qeth_card *card,
3234                 struct qeth_reply *reply, unsigned long data)
3235 {
3236         struct qeth_ipa_cmd *cmd;
3237
3238         QETH_CARD_TEXT(card, 2, "qipasscb");
3239
3240         cmd = (struct qeth_ipa_cmd *) data;
3241
3242         switch (cmd->hdr.return_code) {
3243         case IPA_RC_SUCCESS:
3244                 break;
3245         case IPA_RC_NOTSUPP:
3246         case IPA_RC_L2_UNSUPPORTED_CMD:
3247                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3248                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3249                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3250                 return -EOPNOTSUPP;
3251         default:
3252                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3253                                  CARD_DEVID(card), cmd->hdr.return_code);
3254                 return -EIO;
3255         }
3256
3257         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3258                 card->options.ipa4 = cmd->hdr.assists;
3259         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3260                 card->options.ipa6 = cmd->hdr.assists;
3261         else
3262                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3263                                  CARD_DEVID(card));
3264         return 0;
3265 }
3266
3267 static int qeth_query_ipassists(struct qeth_card *card,
3268                                 enum qeth_prot_versions prot)
3269 {
3270         int rc;
3271         struct qeth_cmd_buffer *iob;
3272
3273         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3274         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3275         if (!iob)
3276                 return -ENOMEM;
3277         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3278         return rc;
3279 }
3280
3281 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3282                                 struct qeth_reply *reply, unsigned long data)
3283 {
3284         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3285         struct qeth_query_switch_attributes *attrs;
3286         struct qeth_switch_info *sw_info;
3287
3288         QETH_CARD_TEXT(card, 2, "qswiatcb");
3289         if (qeth_setadpparms_inspect_rc(cmd))
3290                 return -EIO;
3291
3292         sw_info = (struct qeth_switch_info *)reply->param;
3293         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3294         sw_info->capabilities = attrs->capabilities;
3295         sw_info->settings = attrs->settings;
3296         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3297                         sw_info->settings);
3298         return 0;
3299 }
3300
3301 int qeth_query_switch_attributes(struct qeth_card *card,
3302                                  struct qeth_switch_info *sw_info)
3303 {
3304         struct qeth_cmd_buffer *iob;
3305
3306         QETH_CARD_TEXT(card, 2, "qswiattr");
3307         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3308                 return -EOPNOTSUPP;
3309         if (!netif_carrier_ok(card->dev))
3310                 return -ENOMEDIUM;
3311         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3312         if (!iob)
3313                 return -ENOMEM;
3314         return qeth_send_ipa_cmd(card, iob,
3315                                 qeth_query_switch_attributes_cb, sw_info);
3316 }
3317
3318 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3319                                           enum qeth_diags_cmds sub_cmd,
3320                                           unsigned int data_length)
3321 {
3322         struct qeth_ipacmd_diagass *cmd;
3323         struct qeth_cmd_buffer *iob;
3324
3325         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3326                                  DIAG_HDR_LEN + data_length);
3327         if (!iob)
3328                 return NULL;
3329
3330         cmd = &__ipa_cmd(iob)->data.diagass;
3331         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3332         cmd->subcmd = sub_cmd;
3333         return iob;
3334 }
3335 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3336
3337 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3338                 struct qeth_reply *reply, unsigned long data)
3339 {
3340         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3341         u16 rc = cmd->hdr.return_code;
3342
3343         if (rc) {
3344                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3345                 return -EIO;
3346         }
3347
3348         card->info.diagass_support = cmd->data.diagass.ext;
3349         return 0;
3350 }
3351
3352 static int qeth_query_setdiagass(struct qeth_card *card)
3353 {
3354         struct qeth_cmd_buffer *iob;
3355
3356         QETH_CARD_TEXT(card, 2, "qdiagass");
3357         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3358         if (!iob)
3359                 return -ENOMEM;
3360         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3361 }
3362
3363 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3364 {
3365         unsigned long info = get_zeroed_page(GFP_KERNEL);
3366         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3367         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3368         struct ccw_dev_id ccwid;
3369         int level;
3370
3371         tid->chpid = card->info.chpid;
3372         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3373         tid->ssid = ccwid.ssid;
3374         tid->devno = ccwid.devno;
3375         if (!info)
3376                 return;
3377         level = stsi(NULL, 0, 0, 0);
3378         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3379                 tid->lparnr = info222->lpar_number;
3380         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3381                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3382                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3383         }
3384         free_page(info);
3385 }
3386
3387 static int qeth_hw_trap_cb(struct qeth_card *card,
3388                 struct qeth_reply *reply, unsigned long data)
3389 {
3390         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3391         u16 rc = cmd->hdr.return_code;
3392
3393         if (rc) {
3394                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3395                 return -EIO;
3396         }
3397         return 0;
3398 }
3399
3400 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3401 {
3402         struct qeth_cmd_buffer *iob;
3403         struct qeth_ipa_cmd *cmd;
3404
3405         QETH_CARD_TEXT(card, 2, "diagtrap");
3406         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3407         if (!iob)
3408                 return -ENOMEM;
3409         cmd = __ipa_cmd(iob);
3410         cmd->data.diagass.type = 1;
3411         cmd->data.diagass.action = action;
3412         switch (action) {
3413         case QETH_DIAGS_TRAP_ARM:
3414                 cmd->data.diagass.options = 0x0003;
3415                 cmd->data.diagass.ext = 0x00010000 +
3416                         sizeof(struct qeth_trap_id);
3417                 qeth_get_trap_id(card,
3418                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3419                 break;
3420         case QETH_DIAGS_TRAP_DISARM:
3421                 cmd->data.diagass.options = 0x0001;
3422                 break;
3423         case QETH_DIAGS_TRAP_CAPTURE:
3424                 break;
3425         }
3426         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3427 }
3428
3429 static int qeth_check_qdio_errors(struct qeth_card *card,
3430                                   struct qdio_buffer *buf,
3431                                   unsigned int qdio_error,
3432                                   const char *dbftext)
3433 {
3434         if (qdio_error) {
3435                 QETH_CARD_TEXT(card, 2, dbftext);
3436                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3437                                buf->element[15].sflags);
3438                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3439                                buf->element[14].sflags);
3440                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3441                 if ((buf->element[15].sflags) == 0x12) {
3442                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3443                         return 0;
3444                 } else
3445                         return 1;
3446         }
3447         return 0;
3448 }
3449
3450 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3451                                          unsigned int count)
3452 {
3453         struct qeth_qdio_q *queue = card->qdio.in_q;
3454         struct list_head *lh;
3455         int i;
3456         int rc;
3457         int newcount = 0;
3458
3459         /* only requeue at a certain threshold to avoid SIGAs */
3460         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3461                 for (i = queue->next_buf_to_init;
3462                      i < queue->next_buf_to_init + count; ++i) {
3463                         if (qeth_init_input_buffer(card,
3464                                 &queue->bufs[QDIO_BUFNR(i)])) {
3465                                 break;
3466                         } else {
3467                                 newcount++;
3468                         }
3469                 }
3470
3471                 if (newcount < count) {
3472                         /* we are in memory shortage so we switch back to
3473                            traditional skb allocation and drop packages */
3474                         atomic_set(&card->force_alloc_skb, 3);
3475                         count = newcount;
3476                 } else {
3477                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3478                 }
3479
3480                 if (!count) {
3481                         i = 0;
3482                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3483                                 i++;
3484                         if (i == card->qdio.in_buf_pool.buf_count) {
3485                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3486                                 schedule_delayed_work(
3487                                         &card->buffer_reclaim_work,
3488                                         QETH_RECLAIM_WORK_TIME);
3489                         }
3490                         return 0;
3491                 }
3492
3493                 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3494                                                   queue->next_buf_to_init,
3495                                                   count);
3496                 if (rc) {
3497                         QETH_CARD_TEXT(card, 2, "qinberr");
3498                 }
3499                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3500                                                      count);
3501                 return count;
3502         }
3503
3504         return 0;
3505 }
3506
3507 static void qeth_buffer_reclaim_work(struct work_struct *work)
3508 {
3509         struct qeth_card *card = container_of(to_delayed_work(work),
3510                                               struct qeth_card,
3511                                               buffer_reclaim_work);
3512
3513         local_bh_disable();
3514         napi_schedule(&card->napi);
3515         /* kick-start the NAPI softirq: */
3516         local_bh_enable();
3517 }
3518
3519 static void qeth_handle_send_error(struct qeth_card *card,
3520                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3521 {
3522         int sbalf15 = buffer->buffer->element[15].sflags;
3523
3524         QETH_CARD_TEXT(card, 6, "hdsnderr");
3525         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3526
3527         if (!qdio_err)
3528                 return;
3529
3530         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3531                 return;
3532
3533         QETH_CARD_TEXT(card, 1, "lnkfail");
3534         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3535                        (u16)qdio_err, (u8)sbalf15);
3536 }
3537
3538 /**
3539  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3540  * @queue: queue to check for packing buffer
3541  *
3542  * Returns number of buffers that were prepared for flush.
3543  */
3544 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3545 {
3546         struct qeth_qdio_out_buffer *buffer;
3547
3548         buffer = queue->bufs[queue->next_buf_to_fill];
3549         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3550             (buffer->next_element_to_fill > 0)) {
3551                 /* it's a packing buffer */
3552                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3553                 queue->next_buf_to_fill =
3554                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3555                 return 1;
3556         }
3557         return 0;
3558 }
3559
3560 /*
3561  * Switched to packing state if the number of used buffers on a queue
3562  * reaches a certain limit.
3563  */
3564 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3565 {
3566         if (!queue->do_pack) {
3567                 if (atomic_read(&queue->used_buffers)
3568                     >= QETH_HIGH_WATERMARK_PACK){
3569                         /* switch non-PACKING -> PACKING */
3570                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3571                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3572                         queue->do_pack = 1;
3573                 }
3574         }
3575 }
3576
3577 /*
3578  * Switches from packing to non-packing mode. If there is a packing
3579  * buffer on the queue this buffer will be prepared to be flushed.
3580  * In that case 1 is returned to inform the caller. If no buffer
3581  * has to be flushed, zero is returned.
3582  */
3583 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3584 {
3585         if (queue->do_pack) {
3586                 if (atomic_read(&queue->used_buffers)
3587                     <= QETH_LOW_WATERMARK_PACK) {
3588                         /* switch PACKING -> non-PACKING */
3589                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3590                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3591                         queue->do_pack = 0;
3592                         return qeth_prep_flush_pack_buffer(queue);
3593                 }
3594         }
3595         return 0;
3596 }
3597
3598 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3599                                int count)
3600 {
3601         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3602         struct qeth_card *card = queue->card;
3603         unsigned int frames, usecs;
3604         struct qaob *aob = NULL;
3605         int rc;
3606         int i;
3607
3608         for (i = index; i < index + count; ++i) {
3609                 unsigned int bidx = QDIO_BUFNR(i);
3610                 struct sk_buff *skb;
3611
3612                 buf = queue->bufs[bidx];
3613                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3614                                 SBAL_EFLAGS_LAST_ENTRY;
3615                 queue->coalesced_frames += buf->frames;
3616
3617                 if (IS_IQD(card)) {
3618                         skb_queue_walk(&buf->skb_list, skb)
3619                                 skb_tx_timestamp(skb);
3620                 }
3621         }
3622
3623         if (IS_IQD(card)) {
3624                 if (card->options.cq == QETH_CQ_ENABLED &&
3625                     !qeth_iqd_is_mcast_queue(card, queue) &&
3626                     count == 1) {
3627                         if (!buf->aob)
3628                                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3629                                                              GFP_ATOMIC);
3630                         if (buf->aob) {
3631                                 struct qeth_qaob_priv1 *priv;
3632
3633                                 aob = buf->aob;
3634                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3635                                 priv->state = QETH_QAOB_ISSUED;
3636                                 priv->queue_no = queue->queue_no;
3637                         }
3638                 }
3639         } else {
3640                 if (!queue->do_pack) {
3641                         if ((atomic_read(&queue->used_buffers) >=
3642                                 (QETH_HIGH_WATERMARK_PACK -
3643                                  QETH_WATERMARK_PACK_FUZZ)) &&
3644                             !atomic_read(&queue->set_pci_flags_count)) {
3645                                 /* it's likely that we'll go to packing
3646                                  * mode soon */
3647                                 atomic_inc(&queue->set_pci_flags_count);
3648                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3649                         }
3650                 } else {
3651                         if (!atomic_read(&queue->set_pci_flags_count)) {
3652                                 /*
3653                                  * there's no outstanding PCI any more, so we
3654                                  * have to request a PCI to be sure the PCI
3655                                  * will wake at some time in the future then we
3656                                  * can flush packed buffers that might still be
3657                                  * hanging around, which can happen if no
3658                                  * further send was requested by the stack
3659                                  */
3660                                 atomic_inc(&queue->set_pci_flags_count);
3661                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3662                         }
3663                 }
3664         }
3665
3666         QETH_TXQ_STAT_INC(queue, doorbell);
3667         rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3668                                            index, count, aob);
3669
3670         switch (rc) {
3671         case 0:
3672         case -ENOBUFS:
3673                 /* ignore temporary SIGA errors without busy condition */
3674
3675                 /* Fake the TX completion interrupt: */
3676                 frames = READ_ONCE(queue->max_coalesced_frames);
3677                 usecs = READ_ONCE(queue->coalesce_usecs);
3678
3679                 if (frames && queue->coalesced_frames >= frames) {
3680                         napi_schedule(&queue->napi);
3681                         queue->coalesced_frames = 0;
3682                         QETH_TXQ_STAT_INC(queue, coal_frames);
3683                 } else if (qeth_use_tx_irqs(card) &&
3684                            atomic_read(&queue->used_buffers) >= 32) {
3685                         /* Old behaviour carried over from the qdio layer: */
3686                         napi_schedule(&queue->napi);
3687                         QETH_TXQ_STAT_INC(queue, coal_frames);
3688                 } else if (usecs) {
3689                         qeth_tx_arm_timer(queue, usecs);
3690                 }
3691
3692                 break;
3693         default:
3694                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3695                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3696                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3697                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3698                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3699
3700                 /* this must not happen under normal circumstances. if it
3701                  * happens something is really wrong -> recover */
3702                 qeth_schedule_recovery(queue->card);
3703         }
3704 }
3705
3706 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3707 {
3708         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3709
3710         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3711         queue->prev_hdr = NULL;
3712         queue->bulk_count = 0;
3713 }
3714
3715 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3716 {
3717         /*
3718          * check if we have to switch to non-packing mode or if
3719          * we have to get a pci flag out on the queue
3720          */
3721         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3722             !atomic_read(&queue->set_pci_flags_count)) {
3723                 unsigned int index, flush_cnt;
3724
3725                 spin_lock(&queue->lock);
3726
3727                 index = queue->next_buf_to_fill;
3728
3729                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3730                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3731                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3732
3733                 if (flush_cnt) {
3734                         qeth_flush_buffers(queue, index, flush_cnt);
3735                         QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3736                 }
3737
3738                 spin_unlock(&queue->lock);
3739         }
3740 }
3741
3742 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3743 {
3744         struct qeth_card *card = (struct qeth_card *)card_ptr;
3745
3746         napi_schedule_irqoff(&card->napi);
3747 }
3748
3749 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3750 {
3751         if (card->options.cq == QETH_CQ_NOTAVAILABLE)
3752                 return -1;
3753
3754         card->options.cq = cq;
3755         return 0;
3756 }
3757 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3758
3759 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3760 {
3761         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3762         unsigned int queue_no = priv->queue_no;
3763
3764         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3765
3766         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3767             queue_no < card->qdio.no_out_queues)
3768                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3769 }
3770
3771 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3772                                  unsigned int queue, int first_element,
3773                                  int count)
3774 {
3775         struct qeth_qdio_q *cq = card->qdio.c_q;
3776         int i;
3777         int rc;
3778
3779         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3780         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3781         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3782
3783         if (qdio_err) {
3784                 netif_tx_stop_all_queues(card->dev);
3785                 qeth_schedule_recovery(card);
3786                 return;
3787         }
3788
3789         for (i = first_element; i < first_element + count; ++i) {
3790                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3791                 int e = 0;
3792
3793                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3794                        buffer->element[e].addr) {
3795                         dma64_t phys_aob_addr = buffer->element[e].addr;
3796
3797                         qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr));
3798                         ++e;
3799                 }
3800                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3801         }
3802         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3803                                           cq->next_buf_to_init, count);
3804         if (rc) {
3805                 dev_warn(&card->gdev->dev,
3806                         "QDIO reported an error, rc=%i\n", rc);
3807                 QETH_CARD_TEXT(card, 2, "qcqherr");
3808         }
3809
3810         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3811 }
3812
3813 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3814                                     unsigned int qdio_err, int queue,
3815                                     int first_elem, int count,
3816                                     unsigned long card_ptr)
3817 {
3818         struct qeth_card *card = (struct qeth_card *)card_ptr;
3819
3820         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3821         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3822
3823         if (qdio_err)
3824                 qeth_schedule_recovery(card);
3825 }
3826
3827 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3828                                      unsigned int qdio_error, int __queue,
3829                                      int first_element, int count,
3830                                      unsigned long card_ptr)
3831 {
3832         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3833
3834         QETH_CARD_TEXT(card, 2, "achkcond");
3835         netif_tx_stop_all_queues(card->dev);
3836         qeth_schedule_recovery(card);
3837 }
3838
3839 /*
3840  * Note: Function assumes that we have 4 outbound queues.
3841  */
3842 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3843 {
3844         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3845         u8 tos;
3846
3847         switch (card->qdio.do_prio_queueing) {
3848         case QETH_PRIO_Q_ING_TOS:
3849         case QETH_PRIO_Q_ING_PREC:
3850                 switch (vlan_get_protocol(skb)) {
3851                 case htons(ETH_P_IP):
3852                         tos = ipv4_get_dsfield(ip_hdr(skb));
3853                         break;
3854                 case htons(ETH_P_IPV6):
3855                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3856                         break;
3857                 default:
3858                         return card->qdio.default_out_queue;
3859                 }
3860                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3861                         return ~tos >> 6 & 3;
3862                 if (tos & IPTOS_MINCOST)
3863                         return 3;
3864                 if (tos & IPTOS_RELIABILITY)
3865                         return 2;
3866                 if (tos & IPTOS_THROUGHPUT)
3867                         return 1;
3868                 if (tos & IPTOS_LOWDELAY)
3869                         return 0;
3870                 break;
3871         case QETH_PRIO_Q_ING_SKB:
3872                 if (skb->priority > 5)
3873                         return 0;
3874                 return ~skb->priority >> 1 & 3;
3875         case QETH_PRIO_Q_ING_VLAN:
3876                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3877                         return ~ntohs(veth->h_vlan_TCI) >>
3878                                (VLAN_PRIO_SHIFT + 1) & 3;
3879                 break;
3880         case QETH_PRIO_Q_ING_FIXED:
3881                 return card->qdio.default_out_queue;
3882         default:
3883                 break;
3884         }
3885         return card->qdio.default_out_queue;
3886 }
3887
3888 /**
3889  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3890  * @skb:                                SKB address
3891  *
3892  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3893  * fragmented part of the SKB. Returns zero for linear SKB.
3894  */
3895 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3896 {
3897         int cnt, elements = 0;
3898
3899         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3900                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3901
3902                 elements += qeth_get_elements_for_range(
3903                         (addr_t)skb_frag_address(frag),
3904                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3905         }
3906         return elements;
3907 }
3908
3909 /**
3910  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3911  *                              to transmit an skb.
3912  * @skb:                        the skb to operate on.
3913  * @data_offset:                skip this part of the skb's linear data
3914  *
3915  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3916  * skb's data (both its linear part and paged fragments).
3917  */
3918 static unsigned int qeth_count_elements(struct sk_buff *skb,
3919                                         unsigned int data_offset)
3920 {
3921         unsigned int elements = qeth_get_elements_for_frags(skb);
3922         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3923         addr_t start = (addr_t)skb->data + data_offset;
3924
3925         if (start != end)
3926                 elements += qeth_get_elements_for_range(start, end);
3927         return elements;
3928 }
3929
3930 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3931                                          MAX_TCP_HEADER)
3932
3933 /**
3934  * qeth_add_hw_header() - add a HW header to an skb.
3935  * @queue: TX queue that the skb will be placed on.
3936  * @skb: skb that the HW header should be added to.
3937  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3938  *       it contains a valid pointer to a qeth_hdr.
3939  * @hdr_len: length of the HW header.
3940  * @proto_len: length of protocol headers that need to be in same page as the
3941  *             HW header.
3942  * @elements: returns the required number of buffer elements for this skb.
3943  *
3944  * Returns the pushed length. If the header can't be pushed on
3945  * (eg. because it would cross a page boundary), it is allocated from
3946  * the cache instead and 0 is returned.
3947  * The number of needed buffer elements is returned in @elements.
3948  * Error to create the hdr is indicated by returning with < 0.
3949  */
3950 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3951                               struct sk_buff *skb, struct qeth_hdr **hdr,
3952                               unsigned int hdr_len, unsigned int proto_len,
3953                               unsigned int *elements)
3954 {
3955         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3956         const unsigned int contiguous = proto_len ? proto_len : 1;
3957         const unsigned int max_elements = queue->max_elements;
3958         unsigned int __elements;
3959         addr_t start, end;
3960         bool push_ok;
3961         int rc;
3962
3963 check_layout:
3964         start = (addr_t)skb->data - hdr_len;
3965         end = (addr_t)skb->data;
3966
3967         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3968                 /* Push HW header into same page as first protocol header. */
3969                 push_ok = true;
3970                 /* ... but TSO always needs a separate element for headers: */
3971                 if (skb_is_gso(skb))
3972                         __elements = 1 + qeth_count_elements(skb, proto_len);
3973                 else
3974                         __elements = qeth_count_elements(skb, 0);
3975         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3976                 /* Push HW header into preceding page, flush with skb->data. */
3977                 push_ok = true;
3978                 __elements = 1 + qeth_count_elements(skb, 0);
3979         } else {
3980                 /* Use header cache, copy protocol headers up. */
3981                 push_ok = false;
3982                 __elements = 1 + qeth_count_elements(skb, proto_len);
3983         }
3984
3985         /* Compress skb to fit into one IO buffer: */
3986         if (__elements > max_elements) {
3987                 if (!skb_is_nonlinear(skb)) {
3988                         /* Drop it, no easy way of shrinking it further. */
3989                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3990                                          max_elements, __elements, skb->len);
3991                         return -E2BIG;
3992                 }
3993
3994                 rc = skb_linearize(skb);
3995                 if (rc) {
3996                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3997                         return rc;
3998                 }
3999
4000                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4001                 /* Linearization changed the layout, re-evaluate: */
4002                 goto check_layout;
4003         }
4004
4005         *elements = __elements;
4006         /* Add the header: */
4007         if (push_ok) {
4008                 *hdr = skb_push(skb, hdr_len);
4009                 return hdr_len;
4010         }
4011
4012         /* Fall back to cache element with known-good alignment: */
4013         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4014                 return -E2BIG;
4015         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4016         if (!*hdr)
4017                 return -ENOMEM;
4018         /* Copy protocol headers behind HW header: */
4019         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4020         return 0;
4021 }
4022
4023 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4024                               struct sk_buff *curr_skb,
4025                               struct qeth_hdr *curr_hdr)
4026 {
4027         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4028         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4029
4030         if (!prev_hdr)
4031                 return true;
4032
4033         /* All packets must have the same target: */
4034         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4035                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4036
4037                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4038                                         eth_hdr(curr_skb)->h_dest) &&
4039                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4040         }
4041
4042         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4043                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4044 }
4045
4046 /**
4047  * qeth_fill_buffer() - map skb into an output buffer
4048  * @buf:        buffer to transport the skb
4049  * @skb:        skb to map into the buffer
4050  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4051  *              from qeth_core_header_cache.
4052  * @offset:     when mapping the skb, start at skb->data + offset
4053  * @hd_len:     if > 0, build a dedicated header element of this size
4054  */
4055 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4056                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4057                                      unsigned int offset, unsigned int hd_len)
4058 {
4059         struct qdio_buffer *buffer = buf->buffer;
4060         int element = buf->next_element_to_fill;
4061         int length = skb_headlen(skb) - offset;
4062         char *data = skb->data + offset;
4063         unsigned int elem_length, cnt;
4064         bool is_first_elem = true;
4065
4066         __skb_queue_tail(&buf->skb_list, skb);
4067
4068         /* build dedicated element for HW Header */
4069         if (hd_len) {
4070                 is_first_elem = false;
4071
4072                 buffer->element[element].addr = virt_to_dma64(hdr);
4073                 buffer->element[element].length = hd_len;
4074                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4075
4076                 /* HW header is allocated from cache: */
4077                 if ((void *)hdr != skb->data)
4078                         __set_bit(element, buf->from_kmem_cache);
4079                 /* HW header was pushed and is contiguous with linear part: */
4080                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4081                          (data == (char *)hdr + hd_len))
4082                         buffer->element[element].eflags |=
4083                                 SBAL_EFLAGS_CONTIGUOUS;
4084
4085                 element++;
4086         }
4087
4088         /* map linear part into buffer element(s) */
4089         while (length > 0) {
4090                 elem_length = min_t(unsigned int, length,
4091                                     PAGE_SIZE - offset_in_page(data));
4092
4093                 buffer->element[element].addr = virt_to_dma64(data);
4094                 buffer->element[element].length = elem_length;
4095                 length -= elem_length;
4096                 if (is_first_elem) {
4097                         is_first_elem = false;
4098                         if (length || skb_is_nonlinear(skb))
4099                                 /* skb needs additional elements */
4100                                 buffer->element[element].eflags =
4101                                         SBAL_EFLAGS_FIRST_FRAG;
4102                         else
4103                                 buffer->element[element].eflags = 0;
4104                 } else {
4105                         buffer->element[element].eflags =
4106                                 SBAL_EFLAGS_MIDDLE_FRAG;
4107                 }
4108
4109                 data += elem_length;
4110                 element++;
4111         }
4112
4113         /* map page frags into buffer element(s) */
4114         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4115                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4116
4117                 data = skb_frag_address(frag);
4118                 length = skb_frag_size(frag);
4119                 while (length > 0) {
4120                         elem_length = min_t(unsigned int, length,
4121                                             PAGE_SIZE - offset_in_page(data));
4122
4123                         buffer->element[element].addr = virt_to_dma64(data);
4124                         buffer->element[element].length = elem_length;
4125                         buffer->element[element].eflags =
4126                                 SBAL_EFLAGS_MIDDLE_FRAG;
4127
4128                         length -= elem_length;
4129                         data += elem_length;
4130                         element++;
4131                 }
4132         }
4133
4134         if (buffer->element[element - 1].eflags)
4135                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4136         buf->next_element_to_fill = element;
4137         return element;
4138 }
4139
4140 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4141                        struct sk_buff *skb, unsigned int elements,
4142                        struct qeth_hdr *hdr, unsigned int offset,
4143                        unsigned int hd_len)
4144 {
4145         unsigned int bytes = qdisc_pkt_len(skb);
4146         struct qeth_qdio_out_buffer *buffer;
4147         unsigned int next_element;
4148         struct netdev_queue *txq;
4149         bool stopped = false;
4150         bool flush;
4151
4152         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4153         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4154
4155         /* Just a sanity check, the wake/stop logic should ensure that we always
4156          * get a free buffer.
4157          */
4158         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4159                 return -EBUSY;
4160
4161         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4162
4163         if (flush ||
4164             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4165                 if (buffer->next_element_to_fill > 0) {
4166                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4167                         queue->bulk_count++;
4168                 }
4169
4170                 if (queue->bulk_count >= queue->bulk_max)
4171                         flush = true;
4172
4173                 if (flush)
4174                         qeth_flush_queue(queue);
4175
4176                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4177                                                 queue->bulk_count)];
4178
4179                 /* Sanity-check again: */
4180                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4181                         return -EBUSY;
4182         }
4183
4184         if (buffer->next_element_to_fill == 0 &&
4185             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4186                 /* If a TX completion happens right _here_ and misses to wake
4187                  * the txq, then our re-check below will catch the race.
4188                  */
4189                 QETH_TXQ_STAT_INC(queue, stopped);
4190                 netif_tx_stop_queue(txq);
4191                 stopped = true;
4192         }
4193
4194         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4195         buffer->bytes += bytes;
4196         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4197         queue->prev_hdr = hdr;
4198
4199         flush = __netdev_tx_sent_queue(txq, bytes,
4200                                        !stopped && netdev_xmit_more());
4201
4202         if (flush || next_element >= queue->max_elements) {
4203                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4204                 queue->bulk_count++;
4205
4206                 if (queue->bulk_count >= queue->bulk_max)
4207                         flush = true;
4208
4209                 if (flush)
4210                         qeth_flush_queue(queue);
4211         }
4212
4213         if (stopped && !qeth_out_queue_is_full(queue))
4214                 netif_tx_start_queue(txq);
4215         return 0;
4216 }
4217
4218 static int qeth_do_send_packet(struct qeth_card *card,
4219                                struct qeth_qdio_out_q *queue,
4220                                struct sk_buff *skb, struct qeth_hdr *hdr,
4221                                unsigned int offset, unsigned int hd_len,
4222                                unsigned int elements_needed)
4223 {
4224         unsigned int start_index = queue->next_buf_to_fill;
4225         struct qeth_qdio_out_buffer *buffer;
4226         unsigned int next_element;
4227         struct netdev_queue *txq;
4228         bool stopped = false;
4229         int flush_count = 0;
4230         int do_pack = 0;
4231         int rc = 0;
4232
4233         buffer = queue->bufs[queue->next_buf_to_fill];
4234
4235         /* Just a sanity check, the wake/stop logic should ensure that we always
4236          * get a free buffer.
4237          */
4238         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4239                 return -EBUSY;
4240
4241         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4242
4243         /* check if we need to switch packing state of this queue */
4244         qeth_switch_to_packing_if_needed(queue);
4245         if (queue->do_pack) {
4246                 do_pack = 1;
4247                 /* does packet fit in current buffer? */
4248                 if (buffer->next_element_to_fill + elements_needed >
4249                     queue->max_elements) {
4250                         /* ... no -> set state PRIMED */
4251                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4252                         flush_count++;
4253                         queue->next_buf_to_fill =
4254                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4255                         buffer = queue->bufs[queue->next_buf_to_fill];
4256
4257                         /* We stepped forward, so sanity-check again: */
4258                         if (atomic_read(&buffer->state) !=
4259                             QETH_QDIO_BUF_EMPTY) {
4260                                 qeth_flush_buffers(queue, start_index,
4261                                                            flush_count);
4262                                 rc = -EBUSY;
4263                                 goto out;
4264                         }
4265                 }
4266         }
4267
4268         if (buffer->next_element_to_fill == 0 &&
4269             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4270                 /* If a TX completion happens right _here_ and misses to wake
4271                  * the txq, then our re-check below will catch the race.
4272                  */
4273                 QETH_TXQ_STAT_INC(queue, stopped);
4274                 netif_tx_stop_queue(txq);
4275                 stopped = true;
4276         }
4277
4278         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4279         buffer->bytes += qdisc_pkt_len(skb);
4280         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4281
4282         if (queue->do_pack)
4283                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4284         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4285                 flush_count++;
4286                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4287                 queue->next_buf_to_fill =
4288                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4289         }
4290
4291         if (flush_count)
4292                 qeth_flush_buffers(queue, start_index, flush_count);
4293
4294 out:
4295         if (do_pack)
4296                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4297
4298         if (stopped && !qeth_out_queue_is_full(queue))
4299                 netif_tx_start_queue(txq);
4300         return rc;
4301 }
4302
4303 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4304                               unsigned int payload_len, struct sk_buff *skb,
4305                               unsigned int proto_len)
4306 {
4307         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4308
4309         ext->hdr_tot_len = sizeof(*ext);
4310         ext->imb_hdr_no = 1;
4311         ext->hdr_type = 1;
4312         ext->hdr_version = 1;
4313         ext->hdr_len = 28;
4314         ext->payload_len = payload_len;
4315         ext->mss = skb_shinfo(skb)->gso_size;
4316         ext->dg_hdr_len = proto_len;
4317 }
4318
4319 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4320               struct qeth_qdio_out_q *queue, __be16 proto,
4321               void (*fill_header)(struct qeth_qdio_out_q *queue,
4322                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4323                                   __be16 proto, unsigned int data_len))
4324 {
4325         unsigned int proto_len, hw_hdr_len;
4326         unsigned int frame_len = skb->len;
4327         bool is_tso = skb_is_gso(skb);
4328         unsigned int data_offset = 0;
4329         struct qeth_hdr *hdr = NULL;
4330         unsigned int hd_len = 0;
4331         unsigned int elements;
4332         int push_len, rc;
4333
4334         if (is_tso) {
4335                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4336                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4337         } else {
4338                 hw_hdr_len = sizeof(struct qeth_hdr);
4339                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4340         }
4341
4342         rc = skb_cow_head(skb, hw_hdr_len);
4343         if (rc)
4344                 return rc;
4345
4346         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4347                                       &elements);
4348         if (push_len < 0)
4349                 return push_len;
4350         if (is_tso || !push_len) {
4351                 /* HW header needs its own buffer element. */
4352                 hd_len = hw_hdr_len + proto_len;
4353                 data_offset = push_len + proto_len;
4354         }
4355         memset(hdr, 0, hw_hdr_len);
4356         fill_header(queue, hdr, skb, proto, frame_len);
4357         if (is_tso)
4358                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4359                                   frame_len - proto_len, skb, proto_len);
4360
4361         if (IS_IQD(card)) {
4362                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4363                                  hd_len);
4364         } else {
4365                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4366                 skb_orphan(skb);
4367                 spin_lock(&queue->lock);
4368                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4369                                          hd_len, elements);
4370                 spin_unlock(&queue->lock);
4371         }
4372
4373         if (rc && !push_len)
4374                 kmem_cache_free(qeth_core_header_cache, hdr);
4375
4376         return rc;
4377 }
4378 EXPORT_SYMBOL_GPL(qeth_xmit);
4379
4380 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4381                 struct qeth_reply *reply, unsigned long data)
4382 {
4383         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4384         struct qeth_ipacmd_setadpparms *setparms;
4385
4386         QETH_CARD_TEXT(card, 4, "prmadpcb");
4387
4388         setparms = &(cmd->data.setadapterparms);
4389         if (qeth_setadpparms_inspect_rc(cmd)) {
4390                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4391                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4392         }
4393         card->info.promisc_mode = setparms->data.mode;
4394         return (cmd->hdr.return_code) ? -EIO : 0;
4395 }
4396
4397 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4398 {
4399         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4400                                                     SET_PROMISC_MODE_OFF;
4401         struct qeth_cmd_buffer *iob;
4402         struct qeth_ipa_cmd *cmd;
4403
4404         QETH_CARD_TEXT(card, 4, "setprom");
4405         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4406
4407         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4408                                    SETADP_DATA_SIZEOF(mode));
4409         if (!iob)
4410                 return;
4411         cmd = __ipa_cmd(iob);
4412         cmd->data.setadapterparms.data.mode = mode;
4413         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4414 }
4415 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4416
4417 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4418                 struct qeth_reply *reply, unsigned long data)
4419 {
4420         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4421         struct qeth_ipacmd_setadpparms *adp_cmd;
4422
4423         QETH_CARD_TEXT(card, 4, "chgmaccb");
4424         if (qeth_setadpparms_inspect_rc(cmd))
4425                 return -EIO;
4426
4427         adp_cmd = &cmd->data.setadapterparms;
4428         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4429                 return -EADDRNOTAVAIL;
4430
4431         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4432             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4433                 return -EADDRNOTAVAIL;
4434
4435         eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4436         return 0;
4437 }
4438
4439 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4440 {
4441         int rc;
4442         struct qeth_cmd_buffer *iob;
4443         struct qeth_ipa_cmd *cmd;
4444
4445         QETH_CARD_TEXT(card, 4, "chgmac");
4446
4447         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4448                                    SETADP_DATA_SIZEOF(change_addr));
4449         if (!iob)
4450                 return -ENOMEM;
4451         cmd = __ipa_cmd(iob);
4452         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4453         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4454         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4455                         card->dev->dev_addr);
4456         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4457                                NULL);
4458         return rc;
4459 }
4460 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4461
4462 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4463                 struct qeth_reply *reply, unsigned long data)
4464 {
4465         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4466         struct qeth_set_access_ctrl *access_ctrl_req;
4467
4468         QETH_CARD_TEXT(card, 4, "setaccb");
4469
4470         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4471         QETH_CARD_TEXT_(card, 2, "rc=%d",
4472                         cmd->data.setadapterparms.hdr.return_code);
4473         if (cmd->data.setadapterparms.hdr.return_code !=
4474                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4475                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4476                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4477                                  cmd->data.setadapterparms.hdr.return_code);
4478         switch (qeth_setadpparms_inspect_rc(cmd)) {
4479         case SET_ACCESS_CTRL_RC_SUCCESS:
4480                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4481                         dev_info(&card->gdev->dev,
4482                             "QDIO data connection isolation is deactivated\n");
4483                 else
4484                         dev_info(&card->gdev->dev,
4485                             "QDIO data connection isolation is activated\n");
4486                 return 0;
4487         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4488                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4489                                  CARD_DEVID(card));
4490                 return 0;
4491         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4492                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4493                                  CARD_DEVID(card));
4494                 return 0;
4495         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4496                 dev_err(&card->gdev->dev, "Adapter does not "
4497                         "support QDIO data connection isolation\n");
4498                 return -EOPNOTSUPP;
4499         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4500                 dev_err(&card->gdev->dev,
4501                         "Adapter is dedicated. "
4502                         "QDIO data connection isolation not supported\n");
4503                 return -EOPNOTSUPP;
4504         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4505                 dev_err(&card->gdev->dev,
4506                         "TSO does not permit QDIO data connection isolation\n");
4507                 return -EPERM;
4508         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4509                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4510                         "support reflective relay mode\n");
4511                 return -EOPNOTSUPP;
4512         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4513                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4514                                         "enabled at the adjacent switch port");
4515                 return -EREMOTEIO;
4516         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4517                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4518                                         "at the adjacent switch failed\n");
4519                 /* benign error while disabling ISOLATION_MODE_FWD */
4520                 return 0;
4521         default:
4522                 return -EIO;
4523         }
4524 }
4525
4526 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4527                                      enum qeth_ipa_isolation_modes mode)
4528 {
4529         int rc;
4530         struct qeth_cmd_buffer *iob;
4531         struct qeth_ipa_cmd *cmd;
4532         struct qeth_set_access_ctrl *access_ctrl_req;
4533
4534         QETH_CARD_TEXT(card, 4, "setacctl");
4535
4536         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4537                 dev_err(&card->gdev->dev,
4538                         "Adapter does not support QDIO data connection isolation\n");
4539                 return -EOPNOTSUPP;
4540         }
4541
4542         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4543                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4544         if (!iob)
4545                 return -ENOMEM;
4546         cmd = __ipa_cmd(iob);
4547         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4548         access_ctrl_req->subcmd_code = mode;
4549
4550         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4551                                NULL);
4552         if (rc) {
4553                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4554                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4555                                  rc, CARD_DEVID(card));
4556         }
4557
4558         return rc;
4559 }
4560
4561 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4562 {
4563         struct qeth_card *card;
4564
4565         card = dev->ml_priv;
4566         QETH_CARD_TEXT(card, 4, "txtimeo");
4567         qeth_schedule_recovery(card);
4568 }
4569 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4570
4571 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4572 {
4573         struct qeth_card *card = dev->ml_priv;
4574         int rc = 0;
4575
4576         switch (regnum) {
4577         case MII_BMCR: /* Basic mode control register */
4578                 rc = BMCR_FULLDPLX;
4579                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4580                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4581                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4582                         rc |= BMCR_SPEED100;
4583                 break;
4584         case MII_BMSR: /* Basic mode status register */
4585                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4586                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4587                      BMSR_100BASE4;
4588                 break;
4589         case MII_PHYSID1: /* PHYS ID 1 */
4590                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4591                      dev->dev_addr[2];
4592                 rc = (rc >> 5) & 0xFFFF;
4593                 break;
4594         case MII_PHYSID2: /* PHYS ID 2 */
4595                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4596                 break;
4597         case MII_ADVERTISE: /* Advertisement control reg */
4598                 rc = ADVERTISE_ALL;
4599                 break;
4600         case MII_LPA: /* Link partner ability reg */
4601                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4602                      LPA_100BASE4 | LPA_LPACK;
4603                 break;
4604         case MII_EXPANSION: /* Expansion register */
4605                 break;
4606         case MII_DCOUNTER: /* disconnect counter */
4607                 break;
4608         case MII_FCSCOUNTER: /* false carrier counter */
4609                 break;
4610         case MII_NWAYTEST: /* N-way auto-neg test register */
4611                 break;
4612         case MII_RERRCOUNTER: /* rx error counter */
4613                 rc = card->stats.rx_length_errors +
4614                      card->stats.rx_frame_errors +
4615                      card->stats.rx_fifo_errors;
4616                 break;
4617         case MII_SREVISION: /* silicon revision */
4618                 break;
4619         case MII_RESV1: /* reserved 1 */
4620                 break;
4621         case MII_LBRERROR: /* loopback, rx, bypass error */
4622                 break;
4623         case MII_PHYADDR: /* physical address */
4624                 break;
4625         case MII_RESV2: /* reserved 2 */
4626                 break;
4627         case MII_TPISTATUS: /* TPI status for 10mbps */
4628                 break;
4629         case MII_NCONFIG: /* network interface config */
4630                 break;
4631         default:
4632                 break;
4633         }
4634         return rc;
4635 }
4636
4637 static int qeth_snmp_command_cb(struct qeth_card *card,
4638                                 struct qeth_reply *reply, unsigned long data)
4639 {
4640         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4641         struct qeth_arp_query_info *qinfo = reply->param;
4642         struct qeth_ipacmd_setadpparms *adp_cmd;
4643         unsigned int data_len;
4644         void *snmp_data;
4645
4646         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4647
4648         if (cmd->hdr.return_code) {
4649                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4650                 return -EIO;
4651         }
4652         if (cmd->data.setadapterparms.hdr.return_code) {
4653                 cmd->hdr.return_code =
4654                         cmd->data.setadapterparms.hdr.return_code;
4655                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4656                 return -EIO;
4657         }
4658
4659         adp_cmd = &cmd->data.setadapterparms;
4660         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4661         if (adp_cmd->hdr.seq_no == 1) {
4662                 snmp_data = &adp_cmd->data.snmp;
4663         } else {
4664                 snmp_data = &adp_cmd->data.snmp.request;
4665                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4666         }
4667
4668         /* check if there is enough room in userspace */
4669         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4670                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4671                 return -ENOSPC;
4672         }
4673         QETH_CARD_TEXT_(card, 4, "snore%i",
4674                         cmd->data.setadapterparms.hdr.used_total);
4675         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4676                         cmd->data.setadapterparms.hdr.seq_no);
4677         /*copy entries to user buffer*/
4678         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4679         qinfo->udata_offset += data_len;
4680
4681         if (cmd->data.setadapterparms.hdr.seq_no <
4682             cmd->data.setadapterparms.hdr.used_total)
4683                 return 1;
4684         return 0;
4685 }
4686
4687 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4688 {
4689         struct qeth_snmp_ureq __user *ureq;
4690         struct qeth_cmd_buffer *iob;
4691         unsigned int req_len;
4692         struct qeth_arp_query_info qinfo = {0, };
4693         int rc = 0;
4694
4695         QETH_CARD_TEXT(card, 3, "snmpcmd");
4696
4697         if (IS_VM_NIC(card))
4698                 return -EOPNOTSUPP;
4699
4700         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4701             IS_LAYER3(card))
4702                 return -EOPNOTSUPP;
4703
4704         ureq = (struct qeth_snmp_ureq __user *) udata;
4705         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4706             get_user(req_len, &ureq->hdr.req_len))
4707                 return -EFAULT;
4708
4709         /* Sanitize user input, to avoid overflows in iob size calculation: */
4710         if (req_len > QETH_BUFSIZE)
4711                 return -EINVAL;
4712
4713         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4714         if (!iob)
4715                 return -ENOMEM;
4716
4717         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4718                            &ureq->cmd, req_len)) {
4719                 qeth_put_cmd(iob);
4720                 return -EFAULT;
4721         }
4722
4723         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4724         if (!qinfo.udata) {
4725                 qeth_put_cmd(iob);
4726                 return -ENOMEM;
4727         }
4728         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4729
4730         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4731         if (rc)
4732                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4733                                  CARD_DEVID(card), rc);
4734         else {
4735                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4736                         rc = -EFAULT;
4737         }
4738
4739         kfree(qinfo.udata);
4740         return rc;
4741 }
4742
4743 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4744                                          struct qeth_reply *reply,
4745                                          unsigned long data)
4746 {
4747         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4748         struct qeth_qoat_priv *priv = reply->param;
4749         int resdatalen;
4750
4751         QETH_CARD_TEXT(card, 3, "qoatcb");
4752         if (qeth_setadpparms_inspect_rc(cmd))
4753                 return -EIO;
4754
4755         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4756
4757         if (resdatalen > (priv->buffer_len - priv->response_len))
4758                 return -ENOSPC;
4759
4760         memcpy(priv->buffer + priv->response_len,
4761                &cmd->data.setadapterparms.hdr, resdatalen);
4762         priv->response_len += resdatalen;
4763
4764         if (cmd->data.setadapterparms.hdr.seq_no <
4765             cmd->data.setadapterparms.hdr.used_total)
4766                 return 1;
4767         return 0;
4768 }
4769
4770 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4771 {
4772         int rc = 0;
4773         struct qeth_cmd_buffer *iob;
4774         struct qeth_ipa_cmd *cmd;
4775         struct qeth_query_oat *oat_req;
4776         struct qeth_query_oat_data oat_data;
4777         struct qeth_qoat_priv priv;
4778         void __user *tmp;
4779
4780         QETH_CARD_TEXT(card, 3, "qoatcmd");
4781
4782         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4783                 return -EOPNOTSUPP;
4784
4785         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4786                 return -EFAULT;
4787
4788         priv.buffer_len = oat_data.buffer_len;
4789         priv.response_len = 0;
4790         priv.buffer = vzalloc(oat_data.buffer_len);
4791         if (!priv.buffer)
4792                 return -ENOMEM;
4793
4794         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4795                                    SETADP_DATA_SIZEOF(query_oat));
4796         if (!iob) {
4797                 rc = -ENOMEM;
4798                 goto out_free;
4799         }
4800         cmd = __ipa_cmd(iob);
4801         oat_req = &cmd->data.setadapterparms.data.query_oat;
4802         oat_req->subcmd_code = oat_data.command;
4803
4804         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4805         if (!rc) {
4806                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4807                                          u64_to_user_ptr(oat_data.ptr);
4808                 oat_data.response_len = priv.response_len;
4809
4810                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4811                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4812                         rc = -EFAULT;
4813         }
4814
4815 out_free:
4816         vfree(priv.buffer);
4817         return rc;
4818 }
4819
4820 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4821                                       struct qeth_reply *reply_priv,
4822                                       unsigned long data)
4823 {
4824         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4825         struct qeth_link_info *link_info = reply_priv->param;
4826         struct qeth_query_oat_physical_if *phys_if;
4827         struct qeth_query_oat_reply *reply;
4828
4829         QETH_CARD_TEXT(card, 2, "qoatincb");
4830         if (qeth_setadpparms_inspect_rc(cmd))
4831                 return -EIO;
4832
4833         /* Multi-part reply is unexpected, don't bother: */
4834         if (cmd->data.setadapterparms.hdr.used_total > 1)
4835                 return -EINVAL;
4836
4837         /* Expect the reply to start with phys_if data: */
4838         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4839         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4840             reply->length < sizeof(*reply))
4841                 return -EINVAL;
4842
4843         phys_if = &reply->phys_if;
4844
4845         switch (phys_if->speed_duplex) {
4846         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4847                 link_info->speed = SPEED_10;
4848                 link_info->duplex = DUPLEX_HALF;
4849                 break;
4850         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4851                 link_info->speed = SPEED_10;
4852                 link_info->duplex = DUPLEX_FULL;
4853                 break;
4854         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4855                 link_info->speed = SPEED_100;
4856                 link_info->duplex = DUPLEX_HALF;
4857                 break;
4858         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4859                 link_info->speed = SPEED_100;
4860                 link_info->duplex = DUPLEX_FULL;
4861                 break;
4862         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4863                 link_info->speed = SPEED_1000;
4864                 link_info->duplex = DUPLEX_HALF;
4865                 break;
4866         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4867                 link_info->speed = SPEED_1000;
4868                 link_info->duplex = DUPLEX_FULL;
4869                 break;
4870         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4871                 link_info->speed = SPEED_10000;
4872                 link_info->duplex = DUPLEX_FULL;
4873                 break;
4874         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4875                 link_info->speed = SPEED_25000;
4876                 link_info->duplex = DUPLEX_FULL;
4877                 break;
4878         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4879         default:
4880                 link_info->speed = SPEED_UNKNOWN;
4881                 link_info->duplex = DUPLEX_UNKNOWN;
4882                 break;
4883         }
4884
4885         switch (phys_if->media_type) {
4886         case QETH_QOAT_PHYS_MEDIA_COPPER:
4887                 link_info->port = PORT_TP;
4888                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4889                 break;
4890         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4891                 link_info->port = PORT_FIBRE;
4892                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4893                 break;
4894         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4895                 link_info->port = PORT_FIBRE;
4896                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4897                 break;
4898         default:
4899                 link_info->port = PORT_OTHER;
4900                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4901                 break;
4902         }
4903
4904         return 0;
4905 }
4906
4907 static void qeth_init_link_info(struct qeth_card *card)
4908 {
4909         qeth_default_link_info(card);
4910
4911         /* Get more accurate data via QUERY OAT: */
4912         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4913                 struct qeth_link_info link_info;
4914                 struct qeth_cmd_buffer *iob;
4915
4916                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4917                                            SETADP_DATA_SIZEOF(query_oat));
4918                 if (iob) {
4919                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4920                         struct qeth_query_oat *oat_req;
4921
4922                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4923                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4924
4925                         if (!qeth_send_ipa_cmd(card, iob,
4926                                                qeth_init_link_info_oat_cb,
4927                                                &link_info)) {
4928                                 if (link_info.speed != SPEED_UNKNOWN)
4929                                         card->info.link_info.speed = link_info.speed;
4930                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4931                                         card->info.link_info.duplex = link_info.duplex;
4932                                 if (link_info.port != PORT_OTHER)
4933                                         card->info.link_info.port = link_info.port;
4934                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4935                                         card->info.link_info.link_mode = link_info.link_mode;
4936                         }
4937                 }
4938         }
4939 }
4940
4941 /**
4942  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4943  * @card: pointer to a qeth_card
4944  *
4945  * Returns
4946  *      0, if a MAC address has been set for the card's netdevice
4947  *      a return code, for various error conditions
4948  */
4949 int qeth_vm_request_mac(struct qeth_card *card)
4950 {
4951         struct diag26c_mac_resp *response;
4952         struct diag26c_mac_req *request;
4953         int rc;
4954
4955         QETH_CARD_TEXT(card, 2, "vmreqmac");
4956
4957         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4958         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4959         if (!request || !response) {
4960                 rc = -ENOMEM;
4961                 goto out;
4962         }
4963
4964         request->resp_buf_len = sizeof(*response);
4965         request->resp_version = DIAG26C_VERSION2;
4966         request->op_code = DIAG26C_GET_MAC;
4967         request->devno = card->info.ddev_devno;
4968
4969         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4970         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4971         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4972         if (rc)
4973                 goto out;
4974         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4975
4976         if (request->resp_buf_len < sizeof(*response) ||
4977             response->version != request->resp_version) {
4978                 rc = -EIO;
4979                 QETH_CARD_TEXT(card, 2, "badresp");
4980                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4981                               sizeof(request->resp_buf_len));
4982         } else if (!is_valid_ether_addr(response->mac)) {
4983                 rc = -EINVAL;
4984                 QETH_CARD_TEXT(card, 2, "badmac");
4985                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4986         } else {
4987                 eth_hw_addr_set(card->dev, response->mac);
4988         }
4989
4990 out:
4991         kfree(response);
4992         kfree(request);
4993         return rc;
4994 }
4995 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4996
4997 static void qeth_determine_capabilities(struct qeth_card *card)
4998 {
4999         struct qeth_channel *channel = &card->data;
5000         struct ccw_device *ddev = channel->ccwdev;
5001         int rc;
5002         int ddev_offline = 0;
5003
5004         QETH_CARD_TEXT(card, 2, "detcapab");
5005         if (!ddev->online) {
5006                 ddev_offline = 1;
5007                 rc = qeth_start_channel(channel);
5008                 if (rc) {
5009                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5010                         goto out;
5011                 }
5012         }
5013
5014         rc = qeth_read_conf_data(card);
5015         if (rc) {
5016                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5017                                  CARD_DEVID(card), rc);
5018                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5019                 goto out_offline;
5020         }
5021
5022         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5023         if (rc)
5024                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5025
5026         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5027         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5028         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5029         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5030         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5031         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5032             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5033             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5034                 dev_info(&card->gdev->dev,
5035                         "Completion Queueing supported\n");
5036         } else {
5037                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5038         }
5039
5040 out_offline:
5041         if (ddev_offline == 1)
5042                 qeth_stop_channel(channel);
5043 out:
5044         return;
5045 }
5046
5047 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5048 {
5049         struct qeth_card_info *info = &card->info;
5050         struct ccw_device *cdev = CARD_DDEV(card);
5051         struct ccw_dev_id dev_id;
5052
5053         QETH_CARD_TEXT(card, 2, "ccwconfd");
5054         ccw_device_get_id(cdev, &dev_id);
5055
5056         info->ddev_devno = dev_id.devno;
5057         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5058                           !ccw_device_get_iid(cdev, &info->iid) &&
5059                           !ccw_device_get_chid(cdev, 0, &info->chid);
5060         info->ssid = dev_id.ssid;
5061
5062         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5063                  info->chid, info->chpid);
5064
5065         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5066         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5067         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5068         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5069         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5070         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5071         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5072 }
5073
5074 static int qeth_qdio_establish(struct qeth_card *card)
5075 {
5076         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5077         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5078         struct qeth_qib_parms *qib_parms = NULL;
5079         struct qdio_initialize init_data;
5080         unsigned int no_input_qs = 1;
5081         unsigned int i;
5082         int rc = 0;
5083
5084         QETH_CARD_TEXT(card, 2, "qdioest");
5085
5086         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5087                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5088                 if (!qib_parms)
5089                         return -ENOMEM;
5090
5091                 qeth_fill_qib_parms(card, qib_parms);
5092         }
5093
5094         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5095         if (card->options.cq == QETH_CQ_ENABLED) {
5096                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5097                 no_input_qs++;
5098         }
5099
5100         for (i = 0; i < card->qdio.no_out_queues; i++)
5101                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5102
5103         memset(&init_data, 0, sizeof(struct qdio_initialize));
5104         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5105                                                           QDIO_QETH_QFMT;
5106         init_data.qib_param_field_format = 0;
5107         init_data.qib_param_field        = (void *)qib_parms;
5108         init_data.no_input_qs            = no_input_qs;
5109         init_data.no_output_qs           = card->qdio.no_out_queues;
5110         init_data.input_handler          = qeth_qdio_input_handler;
5111         init_data.output_handler         = qeth_qdio_output_handler;
5112         init_data.irq_poll               = qeth_qdio_poll;
5113         init_data.int_parm               = (unsigned long) card;
5114         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5115         init_data.output_sbal_addr_array = out_sbal_ptrs;
5116
5117         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5118                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5119                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5120                                    init_data.no_output_qs);
5121                 if (rc) {
5122                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5123                         goto out;
5124                 }
5125                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5126                 if (rc) {
5127                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5128                         qdio_free(CARD_DDEV(card));
5129                 }
5130         }
5131
5132         switch (card->options.cq) {
5133         case QETH_CQ_ENABLED:
5134                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5135                 break;
5136         case QETH_CQ_DISABLED:
5137                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5138                 break;
5139         default:
5140                 break;
5141         }
5142
5143 out:
5144         kfree(qib_parms);
5145         return rc;
5146 }
5147
5148 static void qeth_core_free_card(struct qeth_card *card)
5149 {
5150         QETH_CARD_TEXT(card, 2, "freecrd");
5151
5152         unregister_service_level(&card->qeth_service_level);
5153         debugfs_remove_recursive(card->debugfs);
5154         qeth_put_cmd(card->read_cmd);
5155         destroy_workqueue(card->event_wq);
5156         dev_set_drvdata(&card->gdev->dev, NULL);
5157         kfree(card);
5158 }
5159
5160 static void qeth_trace_features(struct qeth_card *card)
5161 {
5162         QETH_CARD_TEXT(card, 2, "features");
5163         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5164         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5165         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5166         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5167                       sizeof(card->info.diagass_support));
5168 }
5169
5170 static struct ccw_device_id qeth_ids[] = {
5171         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5172                                         .driver_info = QETH_CARD_TYPE_OSD},
5173         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5174                                         .driver_info = QETH_CARD_TYPE_IQD},
5175         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5176                                         .driver_info = QETH_CARD_TYPE_OSM},
5177 #ifdef CONFIG_QETH_OSX
5178         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5179                                         .driver_info = QETH_CARD_TYPE_OSX},
5180 #endif
5181         {},
5182 };
5183 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5184
5185 static struct ccw_driver qeth_ccw_driver = {
5186         .driver = {
5187                 .owner = THIS_MODULE,
5188                 .name = "qeth",
5189         },
5190         .ids = qeth_ids,
5191         .probe = ccwgroup_probe_ccwdev,
5192         .remove = ccwgroup_remove_ccwdev,
5193 };
5194
5195 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5196 {
5197         int retries = 3;
5198         int rc;
5199
5200         QETH_CARD_TEXT(card, 2, "hrdsetup");
5201         atomic_set(&card->force_alloc_skb, 0);
5202         rc = qeth_update_from_chp_desc(card);
5203         if (rc)
5204                 return rc;
5205 retry:
5206         if (retries < 3)
5207                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5208                                  CARD_DEVID(card));
5209         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5210         qeth_stop_channel(&card->data);
5211         qeth_stop_channel(&card->write);
5212         qeth_stop_channel(&card->read);
5213         qdio_free(CARD_DDEV(card));
5214
5215         rc = qeth_start_channel(&card->read);
5216         if (rc)
5217                 goto retriable;
5218         rc = qeth_start_channel(&card->write);
5219         if (rc)
5220                 goto retriable;
5221         rc = qeth_start_channel(&card->data);
5222         if (rc)
5223                 goto retriable;
5224 retriable:
5225         if (rc == -ERESTARTSYS) {
5226                 QETH_CARD_TEXT(card, 2, "break1");
5227                 return rc;
5228         } else if (rc) {
5229                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5230                 if (--retries < 0)
5231                         goto out;
5232                 else
5233                         goto retry;
5234         }
5235
5236         qeth_determine_capabilities(card);
5237         qeth_read_ccw_conf_data(card);
5238         qeth_idx_init(card);
5239
5240         rc = qeth_idx_activate_read_channel(card);
5241         if (rc == -EINTR) {
5242                 QETH_CARD_TEXT(card, 2, "break2");
5243                 return rc;
5244         } else if (rc) {
5245                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5246                 if (--retries < 0)
5247                         goto out;
5248                 else
5249                         goto retry;
5250         }
5251
5252         rc = qeth_idx_activate_write_channel(card);
5253         if (rc == -EINTR) {
5254                 QETH_CARD_TEXT(card, 2, "break3");
5255                 return rc;
5256         } else if (rc) {
5257                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5258                 if (--retries < 0)
5259                         goto out;
5260                 else
5261                         goto retry;
5262         }
5263         card->read_or_write_problem = 0;
5264         rc = qeth_mpc_initialize(card);
5265         if (rc) {
5266                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5267                 goto out;
5268         }
5269
5270         rc = qeth_send_startlan(card);
5271         if (rc) {
5272                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5273                 if (rc == -ENETDOWN) {
5274                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5275                         *carrier_ok = false;
5276                 } else {
5277                         goto out;
5278                 }
5279         } else {
5280                 *carrier_ok = true;
5281         }
5282
5283         card->options.ipa4.supported = 0;
5284         card->options.ipa6.supported = 0;
5285         card->options.adp.supported = 0;
5286         card->options.sbp.supported_funcs = 0;
5287         card->info.diagass_support = 0;
5288         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5289         if (rc == -ENOMEM)
5290                 goto out;
5291         if (qeth_is_supported(card, IPA_IPV6)) {
5292                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5293                 if (rc == -ENOMEM)
5294                         goto out;
5295         }
5296         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5297                 rc = qeth_query_setadapterparms(card);
5298                 if (rc < 0) {
5299                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5300                         goto out;
5301                 }
5302         }
5303         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5304                 rc = qeth_query_setdiagass(card);
5305                 if (rc)
5306                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5307         }
5308
5309         qeth_trace_features(card);
5310
5311         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5312             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5313                 card->info.hwtrap = 0;
5314
5315         if (card->options.isolation != ISOLATION_MODE_NONE) {
5316                 rc = qeth_setadpparms_set_access_ctrl(card,
5317                                                       card->options.isolation);
5318                 if (rc)
5319                         goto out;
5320         }
5321
5322         qeth_init_link_info(card);
5323
5324         rc = qeth_init_qdio_queues(card);
5325         if (rc) {
5326                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5327                 goto out;
5328         }
5329
5330         return 0;
5331 out:
5332         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5333                 "an error on the device\n");
5334         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5335                          CARD_DEVID(card), rc);
5336         return rc;
5337 }
5338
5339 static int qeth_set_online(struct qeth_card *card,
5340                            const struct qeth_discipline *disc)
5341 {
5342         bool carrier_ok;
5343         int rc;
5344
5345         mutex_lock(&card->conf_mutex);
5346         QETH_CARD_TEXT(card, 2, "setonlin");
5347
5348         rc = qeth_hardsetup_card(card, &carrier_ok);
5349         if (rc) {
5350                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5351                 rc = -ENODEV;
5352                 goto err_hardsetup;
5353         }
5354
5355         qeth_print_status_message(card);
5356
5357         if (card->dev->reg_state != NETREG_REGISTERED)
5358                 /* no need for locking / error handling at this early stage: */
5359                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5360
5361         rc = disc->set_online(card, carrier_ok);
5362         if (rc)
5363                 goto err_online;
5364
5365         /* let user_space know that device is online */
5366         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5367
5368         mutex_unlock(&card->conf_mutex);
5369         return 0;
5370
5371 err_online:
5372 err_hardsetup:
5373         qeth_qdio_clear_card(card, 0);
5374         qeth_clear_working_pool_list(card);
5375         qeth_flush_local_addrs(card);
5376
5377         qeth_stop_channel(&card->data);
5378         qeth_stop_channel(&card->write);
5379         qeth_stop_channel(&card->read);
5380         qdio_free(CARD_DDEV(card));
5381
5382         mutex_unlock(&card->conf_mutex);
5383         return rc;
5384 }
5385
5386 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5387                      bool resetting)
5388 {
5389         int rc, rc2, rc3;
5390
5391         mutex_lock(&card->conf_mutex);
5392         QETH_CARD_TEXT(card, 3, "setoffl");
5393
5394         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5395                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5396                 card->info.hwtrap = 1;
5397         }
5398
5399         /* cancel any stalled cmd that might block the rtnl: */
5400         qeth_clear_ipacmd_list(card);
5401
5402         rtnl_lock();
5403         netif_device_detach(card->dev);
5404         netif_carrier_off(card->dev);
5405         rtnl_unlock();
5406
5407         cancel_work_sync(&card->rx_mode_work);
5408
5409         disc->set_offline(card);
5410
5411         qeth_qdio_clear_card(card, 0);
5412         qeth_drain_output_queues(card);
5413         qeth_clear_working_pool_list(card);
5414         qeth_flush_local_addrs(card);
5415         card->info.promisc_mode = 0;
5416         qeth_default_link_info(card);
5417
5418         rc  = qeth_stop_channel(&card->data);
5419         rc2 = qeth_stop_channel(&card->write);
5420         rc3 = qeth_stop_channel(&card->read);
5421         if (!rc)
5422                 rc = (rc2) ? rc2 : rc3;
5423         if (rc)
5424                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5425         qdio_free(CARD_DDEV(card));
5426
5427         /* let user_space know that device is offline */
5428         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5429
5430         mutex_unlock(&card->conf_mutex);
5431         return 0;
5432 }
5433 EXPORT_SYMBOL_GPL(qeth_set_offline);
5434
5435 static int qeth_do_reset(void *data)
5436 {
5437         const struct qeth_discipline *disc;
5438         struct qeth_card *card = data;
5439         int rc;
5440
5441         /* Lock-free, other users will block until we are done. */
5442         disc = card->discipline;
5443
5444         QETH_CARD_TEXT(card, 2, "recover1");
5445         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5446                 return 0;
5447         QETH_CARD_TEXT(card, 2, "recover2");
5448         dev_warn(&card->gdev->dev,
5449                  "A recovery process has been started for the device\n");
5450
5451         qeth_set_offline(card, disc, true);
5452         rc = qeth_set_online(card, disc);
5453         if (!rc) {
5454                 dev_info(&card->gdev->dev,
5455                          "Device successfully recovered!\n");
5456         } else {
5457                 qeth_set_offline(card, disc, true);
5458                 ccwgroup_set_offline(card->gdev, false);
5459                 dev_warn(&card->gdev->dev,
5460                          "The qeth device driver failed to recover an error on the device\n");
5461         }
5462         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5463         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5464         return 0;
5465 }
5466
5467 #if IS_ENABLED(CONFIG_QETH_L3)
5468 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5469                                 struct qeth_hdr *hdr)
5470 {
5471         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5472         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5473         struct net_device *dev = skb->dev;
5474
5475         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5476                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5477                                 "FAKELL", skb->len);
5478                 return;
5479         }
5480
5481         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5482                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5483                                                              ETH_P_IP;
5484                 unsigned char tg_addr[ETH_ALEN];
5485
5486                 skb_reset_network_header(skb);
5487                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5488                 case QETH_CAST_MULTICAST:
5489                         if (prot == ETH_P_IP)
5490                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5491                         else
5492                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5493                         QETH_CARD_STAT_INC(card, rx_multicast);
5494                         break;
5495                 case QETH_CAST_BROADCAST:
5496                         ether_addr_copy(tg_addr, dev->broadcast);
5497                         QETH_CARD_STAT_INC(card, rx_multicast);
5498                         break;
5499                 default:
5500                         if (card->options.sniffer)
5501                                 skb->pkt_type = PACKET_OTHERHOST;
5502                         ether_addr_copy(tg_addr, dev->dev_addr);
5503                 }
5504
5505                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5506                         dev_hard_header(skb, dev, prot, tg_addr,
5507                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5508                 else
5509                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5510                                         skb->len);
5511         }
5512
5513         /* copy VLAN tag from hdr into skb */
5514         if (!card->options.sniffer &&
5515             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5516                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5517                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5518                                 l3_hdr->vlan_id :
5519                                 l3_hdr->next_hop.rx.vlan_id;
5520
5521                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5522         }
5523 }
5524 #endif
5525
5526 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5527                              bool uses_frags, bool is_cso)
5528 {
5529         struct napi_struct *napi = &card->napi;
5530
5531         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5532                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5533                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5534         } else {
5535                 skb->ip_summed = CHECKSUM_NONE;
5536         }
5537
5538         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5539         QETH_CARD_STAT_INC(card, rx_packets);
5540         if (skb_is_nonlinear(skb)) {
5541                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5542                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5543                                    skb_shinfo(skb)->nr_frags);
5544         }
5545
5546         if (uses_frags) {
5547                 napi_gro_frags(napi);
5548         } else {
5549                 skb->protocol = eth_type_trans(skb, skb->dev);
5550                 napi_gro_receive(napi, skb);
5551         }
5552 }
5553
5554 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5555 {
5556         struct page *page = virt_to_page(data);
5557         unsigned int next_frag;
5558
5559         next_frag = skb_shinfo(skb)->nr_frags;
5560         get_page(page);
5561         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5562                         data_len);
5563 }
5564
5565 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5566 {
5567         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5568 }
5569
5570 static int qeth_extract_skb(struct qeth_card *card,
5571                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5572                             int *__offset)
5573 {
5574         struct qeth_priv *priv = netdev_priv(card->dev);
5575         struct qdio_buffer *buffer = qethbuffer->buffer;
5576         struct napi_struct *napi = &card->napi;
5577         struct qdio_buffer_element *element;
5578         unsigned int linear_len = 0;
5579         bool uses_frags = false;
5580         int offset = *__offset;
5581         bool use_rx_sg = false;
5582         unsigned int headroom;
5583         struct qeth_hdr *hdr;
5584         struct sk_buff *skb;
5585         int skb_len = 0;
5586         bool is_cso;
5587
5588         element = &buffer->element[*element_no];
5589
5590 next_packet:
5591         /* qeth_hdr must not cross element boundaries */
5592         while (element->length < offset + sizeof(struct qeth_hdr)) {
5593                 if (qeth_is_last_sbale(element))
5594                         return -ENODATA;
5595                 element++;
5596                 offset = 0;
5597         }
5598
5599         hdr = dma64_to_virt(element->addr) + offset;
5600         offset += sizeof(*hdr);
5601         skb = NULL;
5602
5603         switch (hdr->hdr.l2.id) {
5604         case QETH_HEADER_TYPE_LAYER2:
5605                 skb_len = hdr->hdr.l2.pkt_length;
5606                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5607
5608                 linear_len = ETH_HLEN;
5609                 headroom = 0;
5610                 break;
5611         case QETH_HEADER_TYPE_LAYER3:
5612                 skb_len = hdr->hdr.l3.length;
5613                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5614
5615                 if (!IS_LAYER3(card)) {
5616                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5617                         goto walk_packet;
5618                 }
5619
5620                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5621                         linear_len = ETH_HLEN;
5622                         headroom = 0;
5623                         break;
5624                 }
5625
5626                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5627                         linear_len = sizeof(struct ipv6hdr);
5628                 else
5629                         linear_len = sizeof(struct iphdr);
5630                 headroom = ETH_HLEN;
5631                 break;
5632         default:
5633                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5634                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5635                 else
5636                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5637
5638                 /* Can't determine packet length, drop the whole buffer. */
5639                 return -EPROTONOSUPPORT;
5640         }
5641
5642         if (skb_len < linear_len) {
5643                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5644                 goto walk_packet;
5645         }
5646
5647         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5648                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5649                      !atomic_read(&card->force_alloc_skb));
5650
5651         if (use_rx_sg) {
5652                 /* QETH_CQ_ENABLED only: */
5653                 if (qethbuffer->rx_skb &&
5654                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5655                         skb = qethbuffer->rx_skb;
5656                         qethbuffer->rx_skb = NULL;
5657                         goto use_skb;
5658                 }
5659
5660                 skb = napi_get_frags(napi);
5661                 if (!skb) {
5662                         /* -ENOMEM, no point in falling back further. */
5663                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5664                         goto walk_packet;
5665                 }
5666
5667                 if (skb_tailroom(skb) >= linear_len + headroom) {
5668                         uses_frags = true;
5669                         goto use_skb;
5670                 }
5671
5672                 netdev_info_once(card->dev,
5673                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5674                                  linear_len + headroom, skb_tailroom(skb));
5675                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5676         }
5677
5678         linear_len = skb_len;
5679         skb = napi_alloc_skb(napi, linear_len + headroom);
5680         if (!skb) {
5681                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5682                 goto walk_packet;
5683         }
5684
5685 use_skb:
5686         if (headroom)
5687                 skb_reserve(skb, headroom);
5688 walk_packet:
5689         while (skb_len) {
5690                 int data_len = min(skb_len, (int)(element->length - offset));
5691                 char *data = dma64_to_virt(element->addr) + offset;
5692
5693                 skb_len -= data_len;
5694                 offset += data_len;
5695
5696                 /* Extract data from current element: */
5697                 if (skb && data_len) {
5698                         if (linear_len) {
5699                                 unsigned int copy_len;
5700
5701                                 copy_len = min_t(unsigned int, linear_len,
5702                                                  data_len);
5703
5704                                 skb_put_data(skb, data, copy_len);
5705                                 linear_len -= copy_len;
5706                                 data_len -= copy_len;
5707                                 data += copy_len;
5708                         }
5709
5710                         if (data_len)
5711                                 qeth_create_skb_frag(skb, data, data_len);
5712                 }
5713
5714                 /* Step forward to next element: */
5715                 if (skb_len) {
5716                         if (qeth_is_last_sbale(element)) {
5717                                 QETH_CARD_TEXT(card, 4, "unexeob");
5718                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5719                                 if (skb) {
5720                                         if (uses_frags)
5721                                                 napi_free_frags(napi);
5722                                         else
5723                                                 kfree_skb(skb);
5724                                         QETH_CARD_STAT_INC(card,
5725                                                            rx_length_errors);
5726                                 }
5727                                 return -EMSGSIZE;
5728                         }
5729                         element++;
5730                         offset = 0;
5731                 }
5732         }
5733
5734         /* This packet was skipped, go get another one: */
5735         if (!skb)
5736                 goto next_packet;
5737
5738         *element_no = element - &buffer->element[0];
5739         *__offset = offset;
5740
5741 #if IS_ENABLED(CONFIG_QETH_L3)
5742         if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5743                 qeth_l3_rebuild_skb(card, skb, hdr);
5744 #endif
5745
5746         qeth_receive_skb(card, skb, uses_frags, is_cso);
5747         return 0;
5748 }
5749
5750 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5751                                       struct qeth_qdio_buffer *buf, bool *done)
5752 {
5753         unsigned int work_done = 0;
5754
5755         while (budget) {
5756                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5757                                      &card->rx.e_offset)) {
5758                         *done = true;
5759                         break;
5760                 }
5761
5762                 work_done++;
5763                 budget--;
5764         }
5765
5766         return work_done;
5767 }
5768
5769 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5770 {
5771         struct qeth_rx *ctx = &card->rx;
5772         unsigned int work_done = 0;
5773
5774         while (budget > 0) {
5775                 struct qeth_qdio_buffer *buffer;
5776                 unsigned int skbs_done = 0;
5777                 bool done = false;
5778
5779                 /* Fetch completed RX buffers: */
5780                 if (!card->rx.b_count) {
5781                         card->rx.qdio_err = 0;
5782                         card->rx.b_count =
5783                                 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5784                                                          &card->rx.b_index,
5785                                                          &card->rx.qdio_err);
5786                         if (card->rx.b_count <= 0) {
5787                                 card->rx.b_count = 0;
5788                                 break;
5789                         }
5790                 }
5791
5792                 /* Process one completed RX buffer: */
5793                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5794                 if (!(card->rx.qdio_err &&
5795                       qeth_check_qdio_errors(card, buffer->buffer,
5796                                              card->rx.qdio_err, "qinerr")))
5797                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5798                                                       &done);
5799                 else
5800                         done = true;
5801
5802                 work_done += skbs_done;
5803                 budget -= skbs_done;
5804
5805                 if (done) {
5806                         QETH_CARD_STAT_INC(card, rx_bufs);
5807                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5808                         buffer->pool_entry = NULL;
5809                         card->rx.b_count--;
5810                         ctx->bufs_refill++;
5811                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5812                                                                  ctx->bufs_refill);
5813
5814                         /* Step forward to next buffer: */
5815                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5816                         card->rx.buf_element = 0;
5817                         card->rx.e_offset = 0;
5818                 }
5819         }
5820
5821         return work_done;
5822 }
5823
5824 static void qeth_cq_poll(struct qeth_card *card)
5825 {
5826         unsigned int work_done = 0;
5827
5828         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5829                 unsigned int start, error;
5830                 int completed;
5831
5832                 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5833                                                      &error);
5834                 if (completed <= 0)
5835                         return;
5836
5837                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5838                 work_done += completed;
5839         }
5840 }
5841
5842 int qeth_poll(struct napi_struct *napi, int budget)
5843 {
5844         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5845         unsigned int work_done;
5846
5847         work_done = qeth_rx_poll(card, budget);
5848
5849         if (qeth_use_tx_irqs(card)) {
5850                 struct qeth_qdio_out_q *queue;
5851                 unsigned int i;
5852
5853                 qeth_for_each_output_queue(card, queue, i) {
5854                         if (!qeth_out_queue_is_empty(queue))
5855                                 napi_schedule(&queue->napi);
5856                 }
5857         }
5858
5859         if (card->options.cq == QETH_CQ_ENABLED)
5860                 qeth_cq_poll(card);
5861
5862         if (budget) {
5863                 struct qeth_rx *ctx = &card->rx;
5864
5865                 /* Process any substantial refill backlog: */
5866                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5867
5868                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5869                 if (work_done >= budget)
5870                         return work_done;
5871         }
5872
5873         if (napi_complete_done(napi, work_done) &&
5874             qdio_start_irq(CARD_DDEV(card)))
5875                 napi_schedule(napi);
5876
5877         return work_done;
5878 }
5879 EXPORT_SYMBOL_GPL(qeth_poll);
5880
5881 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5882                                  unsigned int bidx, unsigned int qdio_error,
5883                                  int budget)
5884 {
5885         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5886         u8 sflags = buffer->buffer->element[15].sflags;
5887         struct qeth_card *card = queue->card;
5888         bool error = !!qdio_error;
5889
5890         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5891                 struct qaob *aob = buffer->aob;
5892                 struct qeth_qaob_priv1 *priv;
5893                 enum iucv_tx_notify notify;
5894
5895                 if (!aob) {
5896                         netdev_WARN_ONCE(card->dev,
5897                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5898                                          bidx, queue->queue_no);
5899                         qeth_schedule_recovery(card);
5900                         return;
5901                 }
5902
5903                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5904
5905                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5906                 /* QAOB hasn't completed yet: */
5907                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5908                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5909
5910                         /* Prepare the queue slot for immediate re-use: */
5911                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5912                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5913                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5914                                 qeth_schedule_recovery(card);
5915                         }
5916
5917                         list_add(&buffer->list_entry, &queue->pending_bufs);
5918                         /* Skip clearing the buffer: */
5919                         return;
5920                 }
5921
5922                 /* QAOB already completed: */
5923                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5924                 qeth_notify_skbs(queue, buffer, notify);
5925                 error = !!aob->aorc;
5926                 memset(aob, 0, sizeof(*aob));
5927         } else if (card->options.cq == QETH_CQ_ENABLED) {
5928                 qeth_notify_skbs(queue, buffer,
5929                                  qeth_compute_cq_notification(sflags, 0));
5930         }
5931
5932         qeth_clear_output_buffer(queue, buffer, error, budget);
5933 }
5934
5935 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5936 {
5937         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5938         unsigned int queue_no = queue->queue_no;
5939         struct qeth_card *card = queue->card;
5940         struct net_device *dev = card->dev;
5941         unsigned int work_done = 0;
5942         struct netdev_queue *txq;
5943
5944         if (IS_IQD(card))
5945                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5946         else
5947                 txq = netdev_get_tx_queue(dev, queue_no);
5948
5949         while (1) {
5950                 unsigned int start, error, i;
5951                 unsigned int packets = 0;
5952                 unsigned int bytes = 0;
5953                 int completed;
5954
5955                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
5956
5957                 if (qeth_out_queue_is_empty(queue)) {
5958                         napi_complete(napi);
5959                         return 0;
5960                 }
5961
5962                 /* Give the CPU a breather: */
5963                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5964                         QETH_TXQ_STAT_INC(queue, completion_yield);
5965                         if (napi_complete_done(napi, 0))
5966                                 napi_schedule(napi);
5967                         return 0;
5968                 }
5969
5970                 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
5971                                                       &start, &error);
5972                 if (completed <= 0) {
5973                         /* Ensure we see TX completion for pending work: */
5974                         if (napi_complete_done(napi, 0) &&
5975                             !atomic_read(&queue->set_pci_flags_count))
5976                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
5977                         return 0;
5978                 }
5979
5980                 for (i = start; i < start + completed; i++) {
5981                         struct qeth_qdio_out_buffer *buffer;
5982                         unsigned int bidx = QDIO_BUFNR(i);
5983
5984                         buffer = queue->bufs[bidx];
5985                         packets += buffer->frames;
5986                         bytes += buffer->bytes;
5987
5988                         qeth_handle_send_error(card, buffer, error);
5989                         if (IS_IQD(card))
5990                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
5991                         else
5992                                 qeth_clear_output_buffer(queue, buffer, error,
5993                                                          budget);
5994                 }
5995
5996                 atomic_sub(completed, &queue->used_buffers);
5997                 work_done += completed;
5998                 if (IS_IQD(card))
5999                         netdev_tx_completed_queue(txq, packets, bytes);
6000                 else
6001                         qeth_check_outbound_queue(queue);
6002
6003                 /* xmit may have observed the full-condition, but not yet
6004                  * stopped the txq. In which case the code below won't trigger.
6005                  * So before returning, xmit will re-check the txq's fill level
6006                  * and wake it up if needed.
6007                  */
6008                 if (netif_tx_queue_stopped(txq) &&
6009                     !qeth_out_queue_is_full(queue))
6010                         netif_tx_wake_queue(txq);
6011         }
6012 }
6013
6014 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6015 {
6016         if (!cmd->hdr.return_code)
6017                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6018         return cmd->hdr.return_code;
6019 }
6020
6021 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6022                                         struct qeth_reply *reply,
6023                                         unsigned long data)
6024 {
6025         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6026         struct qeth_ipa_caps *caps = reply->param;
6027
6028         if (qeth_setassparms_inspect_rc(cmd))
6029                 return -EIO;
6030
6031         caps->supported = cmd->data.setassparms.data.caps.supported;
6032         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6033         return 0;
6034 }
6035
6036 int qeth_setassparms_cb(struct qeth_card *card,
6037                         struct qeth_reply *reply, unsigned long data)
6038 {
6039         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6040
6041         QETH_CARD_TEXT(card, 4, "defadpcb");
6042
6043         if (cmd->hdr.return_code)
6044                 return -EIO;
6045
6046         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6047         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6048                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6049         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6050                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6051         return 0;
6052 }
6053 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6054
6055 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6056                                                  enum qeth_ipa_funcs ipa_func,
6057                                                  u16 cmd_code,
6058                                                  unsigned int data_length,
6059                                                  enum qeth_prot_versions prot)
6060 {
6061         struct qeth_ipacmd_setassparms *setassparms;
6062         struct qeth_ipacmd_setassparms_hdr *hdr;
6063         struct qeth_cmd_buffer *iob;
6064
6065         QETH_CARD_TEXT(card, 4, "getasscm");
6066         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6067                                  data_length +
6068                                  offsetof(struct qeth_ipacmd_setassparms,
6069                                           data));
6070         if (!iob)
6071                 return NULL;
6072
6073         setassparms = &__ipa_cmd(iob)->data.setassparms;
6074         setassparms->assist_no = ipa_func;
6075
6076         hdr = &setassparms->hdr;
6077         hdr->length = sizeof(*hdr) + data_length;
6078         hdr->command_code = cmd_code;
6079         return iob;
6080 }
6081 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6082
6083 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6084                                       enum qeth_ipa_funcs ipa_func,
6085                                       u16 cmd_code, u32 *data,
6086                                       enum qeth_prot_versions prot)
6087 {
6088         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6089         struct qeth_cmd_buffer *iob;
6090
6091         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6092         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6093         if (!iob)
6094                 return -ENOMEM;
6095
6096         if (data)
6097                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6098         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6099 }
6100 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6101
6102 static void qeth_unregister_dbf_views(void)
6103 {
6104         int x;
6105
6106         for (x = 0; x < QETH_DBF_INFOS; x++) {
6107                 debug_unregister(qeth_dbf[x].id);
6108                 qeth_dbf[x].id = NULL;
6109         }
6110 }
6111
6112 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6113 {
6114         char dbf_txt_buf[32];
6115         va_list args;
6116
6117         if (!debug_level_enabled(id, level))
6118                 return;
6119         va_start(args, fmt);
6120         vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6121         va_end(args);
6122         debug_text_event(id, level, dbf_txt_buf);
6123 }
6124 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6125
6126 static int qeth_register_dbf_views(void)
6127 {
6128         int ret;
6129         int x;
6130
6131         for (x = 0; x < QETH_DBF_INFOS; x++) {
6132                 /* register the areas */
6133                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6134                                                 qeth_dbf[x].pages,
6135                                                 qeth_dbf[x].areas,
6136                                                 qeth_dbf[x].len);
6137                 if (qeth_dbf[x].id == NULL) {
6138                         qeth_unregister_dbf_views();
6139                         return -ENOMEM;
6140                 }
6141
6142                 /* register a view */
6143                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6144                 if (ret) {
6145                         qeth_unregister_dbf_views();
6146                         return ret;
6147                 }
6148
6149                 /* set a passing level */
6150                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6151         }
6152
6153         return 0;
6154 }
6155
6156 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6157
6158 int qeth_setup_discipline(struct qeth_card *card,
6159                           enum qeth_discipline_id discipline)
6160 {
6161         int rc;
6162
6163         mutex_lock(&qeth_mod_mutex);
6164         switch (discipline) {
6165         case QETH_DISCIPLINE_LAYER3:
6166                 card->discipline = try_then_request_module(
6167                         symbol_get(qeth_l3_discipline), "qeth_l3");
6168                 break;
6169         case QETH_DISCIPLINE_LAYER2:
6170                 card->discipline = try_then_request_module(
6171                         symbol_get(qeth_l2_discipline), "qeth_l2");
6172                 break;
6173         default:
6174                 break;
6175         }
6176         mutex_unlock(&qeth_mod_mutex);
6177
6178         if (!card->discipline) {
6179                 dev_err(&card->gdev->dev, "There is no kernel module to "
6180                         "support discipline %d\n", discipline);
6181                 return -EINVAL;
6182         }
6183
6184         rc = card->discipline->setup(card->gdev);
6185         if (rc) {
6186                 if (discipline == QETH_DISCIPLINE_LAYER2)
6187                         symbol_put(qeth_l2_discipline);
6188                 else
6189                         symbol_put(qeth_l3_discipline);
6190                 card->discipline = NULL;
6191
6192                 return rc;
6193         }
6194
6195         card->options.layer = discipline;
6196         return 0;
6197 }
6198
6199 void qeth_remove_discipline(struct qeth_card *card)
6200 {
6201         card->discipline->remove(card->gdev);
6202
6203         if (IS_LAYER2(card))
6204                 symbol_put(qeth_l2_discipline);
6205         else
6206                 symbol_put(qeth_l3_discipline);
6207         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6208         card->discipline = NULL;
6209 }
6210
6211 static const struct device_type qeth_generic_devtype = {
6212         .name = "qeth_generic",
6213 };
6214
6215 #define DBF_NAME_LEN    20
6216
6217 struct qeth_dbf_entry {
6218         char dbf_name[DBF_NAME_LEN];
6219         debug_info_t *dbf_info;
6220         struct list_head dbf_list;
6221 };
6222
6223 static LIST_HEAD(qeth_dbf_list);
6224 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6225
6226 static debug_info_t *qeth_get_dbf_entry(char *name)
6227 {
6228         struct qeth_dbf_entry *entry;
6229         debug_info_t *rc = NULL;
6230
6231         mutex_lock(&qeth_dbf_list_mutex);
6232         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6233                 if (strcmp(entry->dbf_name, name) == 0) {
6234                         rc = entry->dbf_info;
6235                         break;
6236                 }
6237         }
6238         mutex_unlock(&qeth_dbf_list_mutex);
6239         return rc;
6240 }
6241
6242 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6243 {
6244         struct qeth_dbf_entry *new_entry;
6245
6246         card->debug = debug_register(name, 2, 1, 8);
6247         if (!card->debug) {
6248                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6249                 goto err;
6250         }
6251         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6252                 goto err_dbg;
6253         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6254         if (!new_entry)
6255                 goto err_dbg;
6256         strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name));
6257         new_entry->dbf_info = card->debug;
6258         mutex_lock(&qeth_dbf_list_mutex);
6259         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6260         mutex_unlock(&qeth_dbf_list_mutex);
6261
6262         return 0;
6263
6264 err_dbg:
6265         debug_unregister(card->debug);
6266 err:
6267         return -ENOMEM;
6268 }
6269
6270 static void qeth_clear_dbf_list(void)
6271 {
6272         struct qeth_dbf_entry *entry, *tmp;
6273
6274         mutex_lock(&qeth_dbf_list_mutex);
6275         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6276                 list_del(&entry->dbf_list);
6277                 debug_unregister(entry->dbf_info);
6278                 kfree(entry);
6279         }
6280         mutex_unlock(&qeth_dbf_list_mutex);
6281 }
6282
6283 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6284 {
6285         struct net_device *dev;
6286         struct qeth_priv *priv;
6287
6288         switch (card->info.type) {
6289         case QETH_CARD_TYPE_IQD:
6290                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6291                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6292                 break;
6293         case QETH_CARD_TYPE_OSM:
6294                 dev = alloc_etherdev(sizeof(*priv));
6295                 break;
6296         default:
6297                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6298         }
6299
6300         if (!dev)
6301                 return NULL;
6302
6303         priv = netdev_priv(dev);
6304         priv->rx_copybreak = QETH_RX_COPYBREAK;
6305         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6306
6307         dev->ml_priv = card;
6308         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6309         dev->min_mtu = 576;
6310          /* initialized when device first goes online: */
6311         dev->max_mtu = 0;
6312         dev->mtu = 0;
6313         SET_NETDEV_DEV(dev, &card->gdev->dev);
6314         netif_carrier_off(dev);
6315
6316         dev->ethtool_ops = &qeth_ethtool_ops;
6317         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6318         dev->hw_features |= NETIF_F_SG;
6319         dev->vlan_features |= NETIF_F_SG;
6320         if (IS_IQD(card))
6321                 dev->features |= NETIF_F_SG;
6322
6323         return dev;
6324 }
6325
6326 struct net_device *qeth_clone_netdev(struct net_device *orig)
6327 {
6328         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6329
6330         if (!clone)
6331                 return NULL;
6332
6333         clone->dev_port = orig->dev_port;
6334         return clone;
6335 }
6336
6337 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6338 {
6339         struct qeth_card *card;
6340         struct device *dev;
6341         int rc;
6342         enum qeth_discipline_id enforced_disc;
6343         char dbf_name[DBF_NAME_LEN];
6344
6345         QETH_DBF_TEXT(SETUP, 2, "probedev");
6346
6347         dev = &gdev->dev;
6348         if (!get_device(dev))
6349                 return -ENODEV;
6350
6351         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6352
6353         card = qeth_alloc_card(gdev);
6354         if (!card) {
6355                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6356                 rc = -ENOMEM;
6357                 goto err_dev;
6358         }
6359
6360         scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6361                   dev_name(&gdev->dev));
6362         card->debug = qeth_get_dbf_entry(dbf_name);
6363         if (!card->debug) {
6364                 rc = qeth_add_dbf_entry(card, dbf_name);
6365                 if (rc)
6366                         goto err_card;
6367         }
6368
6369         qeth_setup_card(card);
6370         card->dev = qeth_alloc_netdev(card);
6371         if (!card->dev) {
6372                 rc = -ENOMEM;
6373                 goto err_card;
6374         }
6375
6376         qeth_determine_capabilities(card);
6377         qeth_set_blkt_defaults(card);
6378
6379         card->qdio.in_q = qeth_alloc_qdio_queue();
6380         if (!card->qdio.in_q) {
6381                 rc = -ENOMEM;
6382                 goto err_rx_queue;
6383         }
6384
6385         card->qdio.no_out_queues = card->dev->num_tx_queues;
6386         rc = qeth_update_from_chp_desc(card);
6387         if (rc)
6388                 goto err_chp_desc;
6389
6390         gdev->dev.groups = qeth_dev_groups;
6391
6392         enforced_disc = qeth_enforce_discipline(card);
6393         switch (enforced_disc) {
6394         case QETH_DISCIPLINE_UNDETERMINED:
6395                 gdev->dev.type = &qeth_generic_devtype;
6396                 break;
6397         default:
6398                 card->info.layer_enforced = true;
6399                 /* It's so early that we don't need the discipline_mutex yet. */
6400                 rc = qeth_setup_discipline(card, enforced_disc);
6401                 if (rc)
6402                         goto err_setup_disc;
6403
6404                 break;
6405         }
6406
6407         return 0;
6408
6409 err_setup_disc:
6410 err_chp_desc:
6411         qeth_free_qdio_queue(card->qdio.in_q);
6412 err_rx_queue:
6413         free_netdev(card->dev);
6414 err_card:
6415         qeth_core_free_card(card);
6416 err_dev:
6417         put_device(dev);
6418         return rc;
6419 }
6420
6421 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6422 {
6423         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6424
6425         QETH_CARD_TEXT(card, 2, "removedv");
6426
6427         mutex_lock(&card->discipline_mutex);
6428         if (card->discipline)
6429                 qeth_remove_discipline(card);
6430         mutex_unlock(&card->discipline_mutex);
6431
6432         qeth_free_qdio_queues(card);
6433
6434         qeth_free_qdio_queue(card->qdio.in_q);
6435         free_netdev(card->dev);
6436         qeth_core_free_card(card);
6437         put_device(&gdev->dev);
6438 }
6439
6440 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6441 {
6442         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6443         int rc = 0;
6444         enum qeth_discipline_id def_discipline;
6445
6446         mutex_lock(&card->discipline_mutex);
6447         if (!card->discipline) {
6448                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6449                                                 QETH_DISCIPLINE_LAYER2;
6450                 rc = qeth_setup_discipline(card, def_discipline);
6451                 if (rc)
6452                         goto err;
6453         }
6454
6455         rc = qeth_set_online(card, card->discipline);
6456
6457 err:
6458         mutex_unlock(&card->discipline_mutex);
6459         return rc;
6460 }
6461
6462 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6463 {
6464         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6465         int rc;
6466
6467         mutex_lock(&card->discipline_mutex);
6468         rc = qeth_set_offline(card, card->discipline, false);
6469         mutex_unlock(&card->discipline_mutex);
6470
6471         return rc;
6472 }
6473
6474 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6475 {
6476         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6477
6478         qeth_set_allowed_threads(card, 0, 1);
6479         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6480                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6481         qeth_qdio_clear_card(card, 0);
6482         qeth_drain_output_queues(card);
6483         qdio_free(CARD_DDEV(card));
6484 }
6485
6486 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6487                            size_t count)
6488 {
6489         int err;
6490
6491         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6492                                   buf);
6493
6494         return err ? err : count;
6495 }
6496 static DRIVER_ATTR_WO(group);
6497
6498 static struct attribute *qeth_drv_attrs[] = {
6499         &driver_attr_group.attr,
6500         NULL,
6501 };
6502 static struct attribute_group qeth_drv_attr_group = {
6503         .attrs = qeth_drv_attrs,
6504 };
6505 static const struct attribute_group *qeth_drv_attr_groups[] = {
6506         &qeth_drv_attr_group,
6507         NULL,
6508 };
6509
6510 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6511         .driver = {
6512                 .groups = qeth_drv_attr_groups,
6513                 .owner = THIS_MODULE,
6514                 .name = "qeth",
6515         },
6516         .ccw_driver = &qeth_ccw_driver,
6517         .setup = qeth_core_probe_device,
6518         .remove = qeth_core_remove_device,
6519         .set_online = qeth_core_set_online,
6520         .set_offline = qeth_core_set_offline,
6521         .shutdown = qeth_core_shutdown,
6522 };
6523
6524 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6525 {
6526         struct qeth_card *card = dev->ml_priv;
6527         int rc = 0;
6528
6529         switch (cmd) {
6530         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6531                 rc = qeth_snmp_command(card, data);
6532                 break;
6533         case SIOC_QETH_GET_CARD_TYPE:
6534                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6535                     !IS_VM_NIC(card))
6536                         return 1;
6537                 return 0;
6538         case SIOC_QETH_QUERY_OAT:
6539                 rc = qeth_query_oat_command(card, data);
6540                 break;
6541         default:
6542                 rc = -EOPNOTSUPP;
6543         }
6544         if (rc)
6545                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6546         return rc;
6547 }
6548 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6549
6550 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6551 {
6552         struct qeth_card *card = dev->ml_priv;
6553         struct mii_ioctl_data *mii_data;
6554         int rc = 0;
6555
6556         switch (cmd) {
6557         case SIOCGMIIPHY:
6558                 mii_data = if_mii(rq);
6559                 mii_data->phy_id = 0;
6560                 break;
6561         case SIOCGMIIREG:
6562                 mii_data = if_mii(rq);
6563                 if (mii_data->phy_id != 0)
6564                         rc = -EINVAL;
6565                 else
6566                         mii_data->val_out = qeth_mdio_read(dev,
6567                                 mii_data->phy_id, mii_data->reg_num);
6568                 break;
6569         default:
6570                 return -EOPNOTSUPP;
6571         }
6572         if (rc)
6573                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6574         return rc;
6575 }
6576 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6577
6578 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6579                               unsigned long data)
6580 {
6581         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6582         u32 *features = reply->param;
6583
6584         if (qeth_setassparms_inspect_rc(cmd))
6585                 return -EIO;
6586
6587         *features = cmd->data.setassparms.data.flags_32bit;
6588         return 0;
6589 }
6590
6591 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6592                              enum qeth_prot_versions prot)
6593 {
6594         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6595                                                  NULL, prot);
6596 }
6597
6598 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6599                             enum qeth_prot_versions prot, u8 *lp2lp)
6600 {
6601         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6602         struct qeth_cmd_buffer *iob;
6603         struct qeth_ipa_caps caps;
6604         u32 features;
6605         int rc;
6606
6607         /* some L3 HW requires combined L3+L4 csum offload: */
6608         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6609             cstype == IPA_OUTBOUND_CHECKSUM)
6610                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6611
6612         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6613                                        prot);
6614         if (!iob)
6615                 return -ENOMEM;
6616
6617         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6618         if (rc)
6619                 return rc;
6620
6621         if ((required_features & features) != required_features) {
6622                 qeth_set_csum_off(card, cstype, prot);
6623                 return -EOPNOTSUPP;
6624         }
6625
6626         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6627                                        SETASS_DATA_SIZEOF(flags_32bit),
6628                                        prot);
6629         if (!iob) {
6630                 qeth_set_csum_off(card, cstype, prot);
6631                 return -ENOMEM;
6632         }
6633
6634         if (features & QETH_IPA_CHECKSUM_LP2LP)
6635                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6636         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6637         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6638         if (rc) {
6639                 qeth_set_csum_off(card, cstype, prot);
6640                 return rc;
6641         }
6642
6643         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6644             !qeth_ipa_caps_enabled(&caps, required_features)) {
6645                 qeth_set_csum_off(card, cstype, prot);
6646                 return -EOPNOTSUPP;
6647         }
6648
6649         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6650                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6651
6652         if (lp2lp)
6653                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6654
6655         return 0;
6656 }
6657
6658 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6659                              enum qeth_prot_versions prot, u8 *lp2lp)
6660 {
6661         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6662                     qeth_set_csum_off(card, cstype, prot);
6663 }
6664
6665 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6666                              unsigned long data)
6667 {
6668         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6669         struct qeth_tso_start_data *tso_data = reply->param;
6670
6671         if (qeth_setassparms_inspect_rc(cmd))
6672                 return -EIO;
6673
6674         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6675         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6676         return 0;
6677 }
6678
6679 static int qeth_set_tso_off(struct qeth_card *card,
6680                             enum qeth_prot_versions prot)
6681 {
6682         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6683                                                  IPA_CMD_ASS_STOP, NULL, prot);
6684 }
6685
6686 static int qeth_set_tso_on(struct qeth_card *card,
6687                            enum qeth_prot_versions prot)
6688 {
6689         struct qeth_tso_start_data tso_data;
6690         struct qeth_cmd_buffer *iob;
6691         struct qeth_ipa_caps caps;
6692         int rc;
6693
6694         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6695                                        IPA_CMD_ASS_START, 0, prot);
6696         if (!iob)
6697                 return -ENOMEM;
6698
6699         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6700         if (rc)
6701                 return rc;
6702
6703         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6704                 qeth_set_tso_off(card, prot);
6705                 return -EOPNOTSUPP;
6706         }
6707
6708         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6709                                        IPA_CMD_ASS_ENABLE,
6710                                        SETASS_DATA_SIZEOF(caps), prot);
6711         if (!iob) {
6712                 qeth_set_tso_off(card, prot);
6713                 return -ENOMEM;
6714         }
6715
6716         /* enable TSO capability */
6717         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6718                 QETH_IPA_LARGE_SEND_TCP;
6719         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6720         if (rc) {
6721                 qeth_set_tso_off(card, prot);
6722                 return rc;
6723         }
6724
6725         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6726             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6727                 qeth_set_tso_off(card, prot);
6728                 return -EOPNOTSUPP;
6729         }
6730
6731         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6732                  tso_data.mss);
6733         return 0;
6734 }
6735
6736 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6737                             enum qeth_prot_versions prot)
6738 {
6739         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6740 }
6741
6742 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6743 {
6744         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6745         int rc_ipv6;
6746
6747         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6748                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6749                                             QETH_PROT_IPV4, NULL);
6750         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6751                 /* no/one Offload Assist available, so the rc is trivial */
6752                 return rc_ipv4;
6753
6754         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6755                                     QETH_PROT_IPV6, NULL);
6756
6757         if (on)
6758                 /* enable: success if any Assist is active */
6759                 return (rc_ipv6) ? rc_ipv4 : 0;
6760
6761         /* disable: failure if any Assist is still active */
6762         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6763 }
6764
6765 /**
6766  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6767  * @dev:        a net_device
6768  */
6769 void qeth_enable_hw_features(struct net_device *dev)
6770 {
6771         struct qeth_card *card = dev->ml_priv;
6772         netdev_features_t features;
6773
6774         features = dev->features;
6775         /* force-off any feature that might need an IPA sequence.
6776          * netdev_update_features() will restart them.
6777          */
6778         dev->features &= ~dev->hw_features;
6779         /* toggle VLAN filter, so that VIDs are re-programmed: */
6780         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6781                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6782                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6783         }
6784         netdev_update_features(dev);
6785         if (features != dev->features)
6786                 dev_warn(&card->gdev->dev,
6787                          "Device recovery failed to restore all offload features\n");
6788 }
6789 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6790
6791 static void qeth_check_restricted_features(struct qeth_card *card,
6792                                            netdev_features_t changed,
6793                                            netdev_features_t actual)
6794 {
6795         netdev_features_t ipv6_features = NETIF_F_TSO6;
6796         netdev_features_t ipv4_features = NETIF_F_TSO;
6797
6798         if (!card->info.has_lp2lp_cso_v6)
6799                 ipv6_features |= NETIF_F_IPV6_CSUM;
6800         if (!card->info.has_lp2lp_cso_v4)
6801                 ipv4_features |= NETIF_F_IP_CSUM;
6802
6803         if ((changed & ipv6_features) && !(actual & ipv6_features))
6804                 qeth_flush_local_addrs6(card);
6805         if ((changed & ipv4_features) && !(actual & ipv4_features))
6806                 qeth_flush_local_addrs4(card);
6807 }
6808
6809 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6810 {
6811         struct qeth_card *card = dev->ml_priv;
6812         netdev_features_t changed = dev->features ^ features;
6813         int rc = 0;
6814
6815         QETH_CARD_TEXT(card, 2, "setfeat");
6816         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6817
6818         if ((changed & NETIF_F_IP_CSUM)) {
6819                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6820                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6821                                        &card->info.has_lp2lp_cso_v4);
6822                 if (rc)
6823                         changed ^= NETIF_F_IP_CSUM;
6824         }
6825         if (changed & NETIF_F_IPV6_CSUM) {
6826                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6827                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6828                                        &card->info.has_lp2lp_cso_v6);
6829                 if (rc)
6830                         changed ^= NETIF_F_IPV6_CSUM;
6831         }
6832         if (changed & NETIF_F_RXCSUM) {
6833                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6834                 if (rc)
6835                         changed ^= NETIF_F_RXCSUM;
6836         }
6837         if (changed & NETIF_F_TSO) {
6838                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6839                                       QETH_PROT_IPV4);
6840                 if (rc)
6841                         changed ^= NETIF_F_TSO;
6842         }
6843         if (changed & NETIF_F_TSO6) {
6844                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6845                                       QETH_PROT_IPV6);
6846                 if (rc)
6847                         changed ^= NETIF_F_TSO6;
6848         }
6849
6850         qeth_check_restricted_features(card, dev->features ^ features,
6851                                        dev->features ^ changed);
6852
6853         /* everything changed successfully? */
6854         if ((dev->features ^ features) == changed)
6855                 return 0;
6856         /* something went wrong. save changed features and return error */
6857         dev->features ^= changed;
6858         return -EIO;
6859 }
6860 EXPORT_SYMBOL_GPL(qeth_set_features);
6861
6862 netdev_features_t qeth_fix_features(struct net_device *dev,
6863                                     netdev_features_t features)
6864 {
6865         struct qeth_card *card = dev->ml_priv;
6866
6867         QETH_CARD_TEXT(card, 2, "fixfeat");
6868         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6869                 features &= ~NETIF_F_IP_CSUM;
6870         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6871                 features &= ~NETIF_F_IPV6_CSUM;
6872         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6873             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6874                 features &= ~NETIF_F_RXCSUM;
6875         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6876                 features &= ~NETIF_F_TSO;
6877         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6878                 features &= ~NETIF_F_TSO6;
6879
6880         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6881         return features;
6882 }
6883 EXPORT_SYMBOL_GPL(qeth_fix_features);
6884
6885 netdev_features_t qeth_features_check(struct sk_buff *skb,
6886                                       struct net_device *dev,
6887                                       netdev_features_t features)
6888 {
6889         struct qeth_card *card = dev->ml_priv;
6890
6891         /* Traffic with local next-hop is not eligible for some offloads: */
6892         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6893             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6894                 netdev_features_t restricted = 0;
6895
6896                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6897                         restricted |= NETIF_F_ALL_TSO;
6898
6899                 switch (vlan_get_protocol(skb)) {
6900                 case htons(ETH_P_IP):
6901                         if (!card->info.has_lp2lp_cso_v4)
6902                                 restricted |= NETIF_F_IP_CSUM;
6903
6904                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6905                                 features &= ~restricted;
6906                         break;
6907                 case htons(ETH_P_IPV6):
6908                         if (!card->info.has_lp2lp_cso_v6)
6909                                 restricted |= NETIF_F_IPV6_CSUM;
6910
6911                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6912                                 features &= ~restricted;
6913                         break;
6914                 default:
6915                         break;
6916                 }
6917         }
6918
6919         /* GSO segmentation builds skbs with
6920          *      a (small) linear part for the headers, and
6921          *      page frags for the data.
6922          * Compared to a linear skb, the header-only part consumes an
6923          * additional buffer element. This reduces buffer utilization, and
6924          * hurts throughput. So compress small segments into one element.
6925          */
6926         if (netif_needs_gso(skb, features)) {
6927                 /* match skb_segment(): */
6928                 unsigned int doffset = skb->data - skb_mac_header(skb);
6929                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6930                 unsigned int hroom = skb_headroom(skb);
6931
6932                 /* linearize only if resulting skb allocations are order-0: */
6933                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6934                         features &= ~NETIF_F_SG;
6935         }
6936
6937         return vlan_features_check(skb, features);
6938 }
6939 EXPORT_SYMBOL_GPL(qeth_features_check);
6940
6941 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6942 {
6943         struct qeth_card *card = dev->ml_priv;
6944         struct qeth_qdio_out_q *queue;
6945         unsigned int i;
6946
6947         QETH_CARD_TEXT(card, 5, "getstat");
6948
6949         stats->rx_packets = card->stats.rx_packets;
6950         stats->rx_bytes = card->stats.rx_bytes;
6951         stats->rx_errors = card->stats.rx_length_errors +
6952                            card->stats.rx_frame_errors +
6953                            card->stats.rx_fifo_errors;
6954         stats->rx_dropped = card->stats.rx_dropped_nomem +
6955                             card->stats.rx_dropped_notsupp +
6956                             card->stats.rx_dropped_runt;
6957         stats->multicast = card->stats.rx_multicast;
6958         stats->rx_length_errors = card->stats.rx_length_errors;
6959         stats->rx_frame_errors = card->stats.rx_frame_errors;
6960         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6961
6962         for (i = 0; i < card->qdio.no_out_queues; i++) {
6963                 queue = card->qdio.out_qs[i];
6964
6965                 stats->tx_packets += queue->stats.tx_packets;
6966                 stats->tx_bytes += queue->stats.tx_bytes;
6967                 stats->tx_errors += queue->stats.tx_errors;
6968                 stats->tx_dropped += queue->stats.tx_dropped;
6969         }
6970 }
6971 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6972
6973 #define TC_IQD_UCAST   0
6974 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6975                                      unsigned int ucast_txqs)
6976 {
6977         unsigned int prio;
6978
6979         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6980          * qeth_iqd_select_queue() deals with this.
6981          * For unicast traffic, we defer the queue selection to the stack.
6982          * By installing a trivial prio map that spans over only the unicast
6983          * queues, we can encourage the stack to spread the ucast traffic evenly
6984          * without selecting the mcast queue.
6985          */
6986
6987         /* One traffic class, spanning over all active ucast queues: */
6988         netdev_set_num_tc(dev, 1);
6989         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6990                             QETH_IQD_MIN_UCAST_TXQ);
6991
6992         /* Map all priorities to this traffic class: */
6993         for (prio = 0; prio <= TC_BITMASK; prio++)
6994                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
6995 }
6996
6997 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
6998 {
6999         struct net_device *dev = card->dev;
7000         int rc;
7001
7002         /* Per netif_setup_tc(), adjust the mapping first: */
7003         if (IS_IQD(card))
7004                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7005
7006         rc = netif_set_real_num_tx_queues(dev, count);
7007
7008         if (rc && IS_IQD(card))
7009                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7010
7011         return rc;
7012 }
7013 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7014
7015 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7016                           u8 cast_type, struct net_device *sb_dev)
7017 {
7018         u16 txq;
7019
7020         if (cast_type != RTN_UNICAST)
7021                 return QETH_IQD_MCAST_TXQ;
7022         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7023                 return QETH_IQD_MIN_UCAST_TXQ;
7024
7025         txq = netdev_pick_tx(dev, skb, sb_dev);
7026         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7027 }
7028 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7029
7030 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7031                           struct net_device *sb_dev)
7032 {
7033         struct qeth_card *card = dev->ml_priv;
7034
7035         if (qeth_uses_tx_prio_queueing(card))
7036                 return qeth_get_priority_queue(card, skb);
7037
7038         return netdev_pick_tx(dev, skb, sb_dev);
7039 }
7040 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7041
7042 int qeth_open(struct net_device *dev)
7043 {
7044         struct qeth_card *card = dev->ml_priv;
7045         struct qeth_qdio_out_q *queue;
7046         unsigned int i;
7047
7048         QETH_CARD_TEXT(card, 4, "qethopen");
7049
7050         card->data.state = CH_STATE_UP;
7051         netif_tx_start_all_queues(dev);
7052
7053         local_bh_disable();
7054         qeth_for_each_output_queue(card, queue, i) {
7055                 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7056                 napi_enable(&queue->napi);
7057                 napi_schedule(&queue->napi);
7058         }
7059
7060         napi_enable(&card->napi);
7061         napi_schedule(&card->napi);
7062         /* kick-start the NAPI softirq: */
7063         local_bh_enable();
7064
7065         return 0;
7066 }
7067 EXPORT_SYMBOL_GPL(qeth_open);
7068
7069 int qeth_stop(struct net_device *dev)
7070 {
7071         struct qeth_card *card = dev->ml_priv;
7072         struct qeth_qdio_out_q *queue;
7073         unsigned int i;
7074
7075         QETH_CARD_TEXT(card, 4, "qethstop");
7076
7077         napi_disable(&card->napi);
7078         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7079         qdio_stop_irq(CARD_DDEV(card));
7080
7081         /* Quiesce the NAPI instances: */
7082         qeth_for_each_output_queue(card, queue, i)
7083                 napi_disable(&queue->napi);
7084
7085         /* Stop .ndo_start_xmit, might still access queue->napi. */
7086         netif_tx_disable(dev);
7087
7088         qeth_for_each_output_queue(card, queue, i) {
7089                 del_timer_sync(&queue->timer);
7090                 /* Queues may get re-allocated, so remove the NAPIs. */
7091                 netif_napi_del(&queue->napi);
7092         }
7093
7094         return 0;
7095 }
7096 EXPORT_SYMBOL_GPL(qeth_stop);
7097
7098 static int __init qeth_core_init(void)
7099 {
7100         int rc;
7101
7102         pr_info("loading core functions\n");
7103
7104         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7105
7106         rc = qeth_register_dbf_views();
7107         if (rc)
7108                 goto dbf_err;
7109         qeth_core_root_dev = root_device_register("qeth");
7110         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7111         if (rc)
7112                 goto register_err;
7113         qeth_core_header_cache =
7114                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7115                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7116                                   0, NULL);
7117         if (!qeth_core_header_cache) {
7118                 rc = -ENOMEM;
7119                 goto slab_err;
7120         }
7121         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7122                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7123         if (!qeth_qdio_outbuf_cache) {
7124                 rc = -ENOMEM;
7125                 goto cqslab_err;
7126         }
7127
7128         qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7129                                             sizeof(struct qaob),
7130                                             sizeof(struct qaob),
7131                                             0, NULL);
7132         if (!qeth_qaob_cache) {
7133                 rc = -ENOMEM;
7134                 goto qaob_err;
7135         }
7136
7137         rc = ccw_driver_register(&qeth_ccw_driver);
7138         if (rc)
7139                 goto ccw_err;
7140         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7141         if (rc)
7142                 goto ccwgroup_err;
7143
7144         return 0;
7145
7146 ccwgroup_err:
7147         ccw_driver_unregister(&qeth_ccw_driver);
7148 ccw_err:
7149         kmem_cache_destroy(qeth_qaob_cache);
7150 qaob_err:
7151         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7152 cqslab_err:
7153         kmem_cache_destroy(qeth_core_header_cache);
7154 slab_err:
7155         root_device_unregister(qeth_core_root_dev);
7156 register_err:
7157         qeth_unregister_dbf_views();
7158 dbf_err:
7159         debugfs_remove_recursive(qeth_debugfs_root);
7160         pr_err("Initializing the qeth device driver failed\n");
7161         return rc;
7162 }
7163
7164 static void __exit qeth_core_exit(void)
7165 {
7166         qeth_clear_dbf_list();
7167         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7168         ccw_driver_unregister(&qeth_ccw_driver);
7169         kmem_cache_destroy(qeth_qaob_cache);
7170         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7171         kmem_cache_destroy(qeth_core_header_cache);
7172         root_device_unregister(qeth_core_root_dev);
7173         qeth_unregister_dbf_views();
7174         debugfs_remove_recursive(qeth_debugfs_root);
7175         pr_info("core functions removed\n");
7176 }
7177
7178 module_init(qeth_core_init);
7179 module_exit(qeth_core_exit);
7180 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7181 MODULE_DESCRIPTION("qeth core functions");
7182 MODULE_LICENSE("GPL");