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 <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   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         if (!queue)
 198                 return;
 199
 200         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 201                 queue->bufs[i].pool_entry = NULL;
 202 }
 203
 204 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 205 {
 206         unsigned int i;
 207
 208         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 209                 if (entry->elements[i])
 210                         __free_page(entry->elements[i]);
 211         }
 212
 213         kfree(entry);
 214 }
 215
 216 static void qeth_free_buffer_pool(struct qeth_card *card)
 217 {
 218         struct qeth_buffer_pool_entry *entry, *tmp;
 219
 220         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 221                                  init_list) {
 222                 list_del(&entry->init_list);
 223                 qeth_free_pool_entry(entry);
 224         }
 225 }
 226
 227 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 228 {
 229         struct qeth_buffer_pool_entry *entry;
 230         unsigned int i;
 231
 232         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 233         if (!entry)
 234                 return NULL;
 235
 236         for (i = 0; i < pages; i++) {
 237                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 238
 239                 if (!entry->elements[i]) {
 240                         qeth_free_pool_entry(entry);
 241                         return NULL;
 242                 }
 243         }
 244
 245         return entry;
 246 }
 247
 248 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 249 {
 250         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 251         unsigned int i;
 252
 253         QETH_CARD_TEXT(card, 5, "alocpool");
 254         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 255                 struct qeth_buffer_pool_entry *entry;
 256
 257                 entry = qeth_alloc_pool_entry(buf_elements);
 258                 if (!entry) {
 259                         qeth_free_buffer_pool(card);
 260                         return -ENOMEM;
 261                 }
 262
 263                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 264         }
 265         return 0;
 266 }
 267
 268 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 269 {
 270         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 271         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 272         struct qeth_buffer_pool_entry *entry, *tmp;
 273         int delta = count - pool->buf_count;
 274         LIST_HEAD(entries);
 275
 276         QETH_CARD_TEXT(card, 2, "realcbp");
 277
 278         /* Defer until queue is allocated: */
 279         if (!card->qdio.in_q)
 280                 goto out;
 281
 282         /* Remove entries from the pool: */
 283         while (delta < 0) {
 284                 entry = list_first_entry(&pool->entry_list,
 285                                          struct qeth_buffer_pool_entry,
 286                                          init_list);
 287                 list_del(&entry->init_list);
 288                 qeth_free_pool_entry(entry);
 289
 290                 delta++;
 291         }
 292
 293         /* Allocate additional entries: */
 294         while (delta > 0) {
 295                 entry = qeth_alloc_pool_entry(buf_elements);
 296                 if (!entry) {
 297                         list_for_each_entry_safe(entry, tmp, &entries,
 298                                                  init_list) {
 299                                 list_del(&entry->init_list);
 300                                 qeth_free_pool_entry(entry);
 301                         }
 302
 303                         return -ENOMEM;
 304                 }
 305
 306                 list_add(&entry->init_list, &entries);
 307
 308                 delta--;
 309         }
 310
 311         list_splice(&entries, &pool->entry_list);
 312
 313 out:
 314         card->qdio.in_buf_pool.buf_count = count;
 315         pool->buf_count = count;
 316         return 0;
 317 }
 318 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 319
 320 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 321 {
 322         if (!q)
 323                 return;
 324
 325         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 326         kfree(q);
 327 }
 328
 329 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 330 {
 331         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 332         int i;
 333
 334         if (!q)
 335                 return NULL;
 336
 337         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 338                 kfree(q);
 339                 return NULL;
 340         }
 341
 342         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 343                 q->bufs[i].buffer = q->qdio_bufs[i];
 344
 345         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 346         return q;
 347 }
 348
 349 static int qeth_cq_init(struct qeth_card *card)
 350 {
 351         int rc;
 352
 353         if (card->options.cq == QETH_CQ_ENABLED) {
 354                 QETH_CARD_TEXT(card, 2, "cqinit");
 355                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 356                                    QDIO_MAX_BUFFERS_PER_Q);
 357                 card->qdio.c_q->next_buf_to_init = 127;
 358                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 1, 0, 127,
 359                              NULL);
 360                 if (rc) {
 361                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 362                         goto out;
 363                 }
 364         }
 365         rc = 0;
 366 out:
 367         return rc;
 368 }
 369
 370 static int qeth_alloc_cq(struct qeth_card *card)
 371 {
 372         if (card->options.cq == QETH_CQ_ENABLED) {
 373                 QETH_CARD_TEXT(card, 2, "cqon");
 374                 card->qdio.c_q = qeth_alloc_qdio_queue();
 375                 if (!card->qdio.c_q) {
 376                         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 377                         return -ENOMEM;
 378                 }
 379         } else {
 380                 QETH_CARD_TEXT(card, 2, "nocq");
 381                 card->qdio.c_q = NULL;
 382         }
 383         return 0;
 384 }
 385
 386 static void qeth_free_cq(struct qeth_card *card)
 387 {
 388         if (card->qdio.c_q) {
 389                 qeth_free_qdio_queue(card->qdio.c_q);
 390                 card->qdio.c_q = NULL;
 391         }
 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 = (__u32) __pa(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 struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 770                                                 struct qeth_ipa_cmd *cmd)
 771 {
 772         QETH_CARD_TEXT(card, 5, "chkipad");
 773
 774         if (IS_IPA_REPLY(cmd)) {
 775                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 776                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 777                 return cmd;
 778         }
 779
 780         /* handle unsolicited event: */
 781         switch (cmd->hdr.command) {
 782         case IPA_CMD_STOPLAN:
 783                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 784                         dev_err(&card->gdev->dev,
 785                                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
 786                                 netdev_name(card->dev));
 787                         /* Set offline, then probably fail to set online: */
 788                         qeth_schedule_recovery(card);
 789                 } else {
 790                         /* stay online for subsequent STARTLAN */
 791                         dev_warn(&card->gdev->dev,
 792                                  "The link for interface %s on CHPID 0x%X failed\n",
 793                                  netdev_name(card->dev), card->info.chpid);
 794                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 795                         netif_carrier_off(card->dev);
 796                 }
 797                 return NULL;
 798         case IPA_CMD_STARTLAN:
 799                 dev_info(&card->gdev->dev,
 800                          "The link for %s on CHPID 0x%X has been restored\n",
 801                          netdev_name(card->dev), card->info.chpid);
 802                 if (card->info.hwtrap)
 803                         card->info.hwtrap = 2;
 804                 qeth_schedule_recovery(card);
 805                 return NULL;
 806         case IPA_CMD_SETBRIDGEPORT_IQD:
 807         case IPA_CMD_SETBRIDGEPORT_OSA:
 808         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 809                 if (card->discipline->control_event_handler(card, cmd))
 810                         return cmd;
 811                 return NULL;
 812         case IPA_CMD_REGISTER_LOCAL_ADDR:
 813                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 814                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 815                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 816                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 817
 818                 QETH_CARD_TEXT(card, 3, "irla");
 819                 return NULL;
 820         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 821                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 822                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 823                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 824                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 825
 826                 QETH_CARD_TEXT(card, 3, "urla");
 827                 return NULL;
 828         default:
 829                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 830                 return cmd;
 831         }
 832 }
 833
 834 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 835 {
 836         struct qeth_cmd_buffer *iob;
 837         unsigned long flags;
 838
 839         QETH_CARD_TEXT(card, 4, "clipalst");
 840
 841         spin_lock_irqsave(&card->lock, flags);
 842         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 843                 qeth_notify_cmd(iob, -ECANCELED);
 844         spin_unlock_irqrestore(&card->lock, flags);
 845 }
 846
 847 static int qeth_check_idx_response(struct qeth_card *card,
 848         unsigned char *buffer)
 849 {
 850         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 851         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 852                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 853                                  buffer[4]);
 854                 QETH_CARD_TEXT(card, 2, "ckidxres");
 855                 QETH_CARD_TEXT(card, 2, " idxterm");
 856                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 857                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 858                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 859                         dev_err(&card->gdev->dev,
 860                                 "The device does not support the configured transport mode\n");
 861                         return -EPROTONOSUPPORT;
 862                 }
 863                 return -EIO;
 864         }
 865         return 0;
 866 }
 867
 868 static void qeth_release_buffer_cb(struct qeth_card *card,
 869                                    struct qeth_cmd_buffer *iob,
 870                                    unsigned int data_length)
 871 {
 872         qeth_put_cmd(iob);
 873 }
 874
 875 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 876 {
 877         qeth_notify_cmd(iob, rc);
 878         qeth_put_cmd(iob);
 879 }
 880
 881 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 882                                               unsigned int length,
 883                                               unsigned int ccws, long timeout)
 884 {
 885         struct qeth_cmd_buffer *iob;
 886
 887         if (length > QETH_BUFSIZE)
 888                 return NULL;
 889
 890         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 891         if (!iob)
 892                 return NULL;
 893
 894         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 895                             GFP_KERNEL | GFP_DMA);
 896         if (!iob->data) {
 897                 kfree(iob);
 898                 return NULL;
 899         }
 900
 901         init_completion(&iob->done);
 902         spin_lock_init(&iob->lock);
 903         refcount_set(&iob->ref_count, 1);
 904         iob->channel = channel;
 905         iob->timeout = timeout;
 906         iob->length = length;
 907         return iob;
 908 }
 909
 910 static void qeth_issue_next_read_cb(struct qeth_card *card,
 911                                     struct qeth_cmd_buffer *iob,
 912                                     unsigned int data_length)
 913 {
 914         struct qeth_cmd_buffer *request = NULL;
 915         struct qeth_ipa_cmd *cmd = NULL;
 916         struct qeth_reply *reply = NULL;
 917         struct qeth_cmd_buffer *tmp;
 918         unsigned long flags;
 919         int rc = 0;
 920
 921         QETH_CARD_TEXT(card, 4, "sndctlcb");
 922         rc = qeth_check_idx_response(card, iob->data);
 923         switch (rc) {
 924         case 0:
 925                 break;
 926         case -EIO:
 927                 qeth_schedule_recovery(card);
 928                 fallthrough;
 929         default:
 930                 qeth_clear_ipacmd_list(card);
 931                 goto err_idx;
 932         }
 933
 934         cmd = __ipa_reply(iob);
 935         if (cmd) {
 936                 cmd = qeth_check_ipa_data(card, cmd);
 937                 if (!cmd)
 938                         goto out;
 939         }
 940
 941         /* match against pending cmd requests */
 942         spin_lock_irqsave(&card->lock, flags);
 943         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 944                 if (tmp->match && tmp->match(tmp, iob)) {
 945                         request = tmp;
 946                         /* take the object outside the lock */
 947                         qeth_get_cmd(request);
 948                         break;
 949                 }
 950         }
 951         spin_unlock_irqrestore(&card->lock, flags);
 952
 953         if (!request)
 954                 goto out;
 955
 956         reply = &request->reply;
 957         if (!reply->callback) {
 958                 rc = 0;
 959                 goto no_callback;
 960         }
 961
 962         spin_lock_irqsave(&request->lock, flags);
 963         if (request->rc)
 964                 /* Bail out when the requestor has already left: */
 965                 rc = request->rc;
 966         else
 967                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 968                                                         (unsigned long)iob);
 969         spin_unlock_irqrestore(&request->lock, flags);
 970
 971 no_callback:
 972         if (rc <= 0)
 973                 qeth_notify_cmd(request, rc);
 974         qeth_put_cmd(request);
 975 out:
 976         memcpy(&card->seqno.pdu_hdr_ack,
 977                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 978                 QETH_SEQ_NO_LENGTH);
 979         __qeth_issue_next_read(card);
 980 err_idx:
 981         qeth_put_cmd(iob);
 982 }
 983
 984 static int qeth_set_thread_start_bit(struct qeth_card *card,
 985                 unsigned long thread)
 986 {
 987         unsigned long flags;
 988         int rc = 0;
 989
 990         spin_lock_irqsave(&card->thread_mask_lock, flags);
 991         if (!(card->thread_allowed_mask & thread))
 992                 rc = -EPERM;
 993         else if (card->thread_start_mask & thread)
 994                 rc = -EBUSY;
 995         else
 996                 card->thread_start_mask |= thread;
 997         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 998
 999         return rc;
1000 }
1001
1002 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1003                                         unsigned long thread)
1004 {
1005         unsigned long flags;
1006
1007         spin_lock_irqsave(&card->thread_mask_lock, flags);
1008         card->thread_start_mask &= ~thread;
1009         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1010         wake_up(&card->wait_q);
1011 }
1012
1013 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1014                                           unsigned long thread)
1015 {
1016         unsigned long flags;
1017
1018         spin_lock_irqsave(&card->thread_mask_lock, flags);
1019         card->thread_running_mask &= ~thread;
1020         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1021         wake_up_all(&card->wait_q);
1022 }
1023
1024 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1025 {
1026         unsigned long flags;
1027         int rc = 0;
1028
1029         spin_lock_irqsave(&card->thread_mask_lock, flags);
1030         if (card->thread_start_mask & thread) {
1031                 if ((card->thread_allowed_mask & thread) &&
1032                     !(card->thread_running_mask & thread)) {
1033                         rc = 1;
1034                         card->thread_start_mask &= ~thread;
1035                         card->thread_running_mask |= thread;
1036                 } else
1037                         rc = -EPERM;
1038         }
1039         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1040         return rc;
1041 }
1042
1043 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1044 {
1045         int rc = 0;
1046
1047         wait_event(card->wait_q,
1048                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1049         return rc;
1050 }
1051
1052 int qeth_schedule_recovery(struct qeth_card *card)
1053 {
1054         int rc;
1055
1056         QETH_CARD_TEXT(card, 2, "startrec");
1057
1058         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1059         if (!rc)
1060                 schedule_work(&card->kernel_thread_starter);
1061
1062         return rc;
1063 }
1064
1065 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1066                             struct irb *irb)
1067 {
1068         int dstat, cstat;
1069         char *sense;
1070
1071         sense = (char *) irb->ecw;
1072         cstat = irb->scsw.cmd.cstat;
1073         dstat = irb->scsw.cmd.dstat;
1074
1075         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1076                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1077                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1078                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1079                 dev_warn(&cdev->dev, "The qeth device driver "
1080                         "failed to recover an error on the device\n");
1081                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1082                                  CCW_DEVID(cdev), dstat, cstat);
1083                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1084                                 16, 1, irb, 64, 1);
1085                 return -EIO;
1086         }
1087
1088         if (dstat & DEV_STAT_UNIT_CHECK) {
1089                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1090                     SENSE_RESETTING_EVENT_FLAG) {
1091                         QETH_CARD_TEXT(card, 2, "REVIND");
1092                         return -EIO;
1093                 }
1094                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1095                     SENSE_COMMAND_REJECT_FLAG) {
1096                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1097                         return -EIO;
1098                 }
1099                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1100                         QETH_CARD_TEXT(card, 2, "AFFE");
1101                         return -EIO;
1102                 }
1103                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1104                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1105                         return 0;
1106                 }
1107                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1108                 return -EIO;
1109         }
1110         return 0;
1111 }
1112
1113 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1114                                 struct irb *irb)
1115 {
1116         if (!IS_ERR(irb))
1117                 return 0;
1118
1119         switch (PTR_ERR(irb)) {
1120         case -EIO:
1121                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1122                                  CCW_DEVID(cdev));
1123                 QETH_CARD_TEXT(card, 2, "ckirberr");
1124                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1125                 return -EIO;
1126         case -ETIMEDOUT:
1127                 dev_warn(&cdev->dev, "A hardware operation timed out"
1128                         " on the device\n");
1129                 QETH_CARD_TEXT(card, 2, "ckirberr");
1130                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1131                 return -ETIMEDOUT;
1132         default:
1133                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1134                                  PTR_ERR(irb), CCW_DEVID(cdev));
1135                 QETH_CARD_TEXT(card, 2, "ckirberr");
1136                 QETH_CARD_TEXT(card, 2, "  rc???");
1137                 return PTR_ERR(irb);
1138         }
1139 }
1140
1141 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1142                 struct irb *irb)
1143 {
1144         int rc;
1145         int cstat, dstat;
1146         struct qeth_cmd_buffer *iob = NULL;
1147         struct ccwgroup_device *gdev;
1148         struct qeth_channel *channel;
1149         struct qeth_card *card;
1150
1151         /* while we hold the ccwdev lock, this stays valid: */
1152         gdev = dev_get_drvdata(&cdev->dev);
1153         card = dev_get_drvdata(&gdev->dev);
1154
1155         QETH_CARD_TEXT(card, 5, "irq");
1156
1157         if (card->read.ccwdev == cdev) {
1158                 channel = &card->read;
1159                 QETH_CARD_TEXT(card, 5, "read");
1160         } else if (card->write.ccwdev == cdev) {
1161                 channel = &card->write;
1162                 QETH_CARD_TEXT(card, 5, "write");
1163         } else {
1164                 channel = &card->data;
1165                 QETH_CARD_TEXT(card, 5, "data");
1166         }
1167
1168         if (intparm == 0) {
1169                 QETH_CARD_TEXT(card, 5, "irqunsol");
1170         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1171                 QETH_CARD_TEXT(card, 5, "irqunexp");
1172
1173                 dev_err(&cdev->dev,
1174                         "Received IRQ with intparm %lx, expected %px\n",
1175                         intparm, channel->active_cmd);
1176                 if (channel->active_cmd)
1177                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1178         } else {
1179                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1180         }
1181
1182         qeth_unlock_channel(card, channel);
1183
1184         rc = qeth_check_irb_error(card, cdev, irb);
1185         if (rc) {
1186                 /* IO was terminated, free its resources. */
1187                 if (iob)
1188                         qeth_cancel_cmd(iob, rc);
1189                 return;
1190         }
1191
1192         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1193                 channel->state = CH_STATE_STOPPED;
1194                 wake_up(&card->wait_q);
1195         }
1196
1197         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1198                 channel->state = CH_STATE_HALTED;
1199                 wake_up(&card->wait_q);
1200         }
1201
1202         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1203                                           SCSW_FCTL_HALT_FUNC))) {
1204                 qeth_cancel_cmd(iob, -ECANCELED);
1205                 iob = NULL;
1206         }
1207
1208         cstat = irb->scsw.cmd.cstat;
1209         dstat = irb->scsw.cmd.dstat;
1210
1211         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1212             (dstat & DEV_STAT_UNIT_CHECK) ||
1213             (cstat)) {
1214                 if (irb->esw.esw0.erw.cons) {
1215                         dev_warn(&channel->ccwdev->dev,
1216                                 "The qeth device driver failed to recover "
1217                                 "an error on the device\n");
1218                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1219                                          CCW_DEVID(channel->ccwdev), cstat,
1220                                          dstat);
1221                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1222                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1223                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1224                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1225                 }
1226
1227                 rc = qeth_get_problem(card, cdev, irb);
1228                 if (rc) {
1229                         card->read_or_write_problem = 1;
1230                         if (iob)
1231                                 qeth_cancel_cmd(iob, rc);
1232                         qeth_clear_ipacmd_list(card);
1233                         qeth_schedule_recovery(card);
1234                         return;
1235                 }
1236         }
1237
1238         if (iob) {
1239                 /* sanity check: */
1240                 if (irb->scsw.cmd.count > iob->length) {
1241                         qeth_cancel_cmd(iob, -EIO);
1242                         return;
1243                 }
1244                 if (iob->callback)
1245                         iob->callback(card, iob,
1246                                       iob->length - irb->scsw.cmd.count);
1247         }
1248 }
1249
1250 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1251                 struct qeth_qdio_out_buffer *buf,
1252                 enum iucv_tx_notify notification)
1253 {
1254         struct sk_buff *skb;
1255
1256         skb_queue_walk(&buf->skb_list, skb) {
1257                 struct sock *sk = skb->sk;
1258
1259                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1260                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1261                 if (sk && sk->sk_family == PF_IUCV)
1262                         iucv_sk(sk)->sk_txnotify(sk, notification);
1263         }
1264 }
1265
1266 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1267                                  struct qeth_qdio_out_buffer *buf, bool error,
1268                                  int budget)
1269 {
1270         struct sk_buff *skb;
1271
1272         /* Empty buffer? */
1273         if (buf->next_element_to_fill == 0)
1274                 return;
1275
1276         QETH_TXQ_STAT_INC(queue, bufs);
1277         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1278         if (error) {
1279                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1280         } else {
1281                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1282                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1283         }
1284
1285         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1286                 unsigned int bytes = qdisc_pkt_len(skb);
1287                 bool is_tso = skb_is_gso(skb);
1288                 unsigned int packets;
1289
1290                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1291                 if (!error) {
1292                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1293                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1294                         if (skb_is_nonlinear(skb))
1295                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1296                         if (is_tso) {
1297                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1298                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1299                         }
1300                 }
1301
1302                 napi_consume_skb(skb, budget);
1303         }
1304 }
1305
1306 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1307                                      struct qeth_qdio_out_buffer *buf,
1308                                      bool error, int budget)
1309 {
1310         int i;
1311
1312         /* is PCI flag set on buffer? */
1313         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1314                 atomic_dec(&queue->set_pci_flags_count);
1315                 QETH_TXQ_STAT_INC(queue, completion_irq);
1316         }
1317
1318         qeth_tx_complete_buf(queue, buf, error, budget);
1319
1320         for (i = 0; i < queue->max_elements; ++i) {
1321                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1322
1323                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1324                         kmem_cache_free(qeth_core_header_cache, data);
1325         }
1326
1327         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1328         buf->next_element_to_fill = 0;
1329         buf->frames = 0;
1330         buf->bytes = 0;
1331         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1332 }
1333
1334 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1335 {
1336         if (buf->aob)
1337                 kmem_cache_free(qeth_qaob_cache, buf->aob);
1338         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1339 }
1340
1341 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1342                                           struct qeth_qdio_out_q *queue,
1343                                           bool drain, int budget)
1344 {
1345         struct qeth_qdio_out_buffer *buf, *tmp;
1346
1347         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1348                 struct qeth_qaob_priv1 *priv;
1349                 struct qaob *aob = buf->aob;
1350                 enum iucv_tx_notify notify;
1351                 unsigned int i;
1352
1353                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1354                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1355                         QETH_CARD_TEXT(card, 5, "fp");
1356                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1357
1358                         notify = drain ? TX_NOTIFY_GENERALERROR :
1359                                          qeth_compute_cq_notification(aob->aorc, 1);
1360                         qeth_notify_skbs(queue, buf, notify);
1361                         qeth_tx_complete_buf(queue, buf, drain, budget);
1362
1363                         for (i = 0;
1364                              i < aob->sb_count && i < queue->max_elements;
1365                              i++) {
1366                                 void *data = phys_to_virt(aob->sba[i]);
1367
1368                                 if (test_bit(i, buf->from_kmem_cache) && data)
1369                                         kmem_cache_free(qeth_core_header_cache,
1370                                                         data);
1371                         }
1372
1373                         list_del(&buf->list_entry);
1374                         qeth_free_out_buf(buf);
1375                 }
1376         }
1377 }
1378
1379 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1380 {
1381         int j;
1382
1383         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1384
1385         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1386                 if (!q->bufs[j])
1387                         continue;
1388
1389                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1390                 if (free) {
1391                         qeth_free_out_buf(q->bufs[j]);
1392                         q->bufs[j] = NULL;
1393                 }
1394         }
1395 }
1396
1397 static void qeth_drain_output_queues(struct qeth_card *card)
1398 {
1399         int i;
1400
1401         QETH_CARD_TEXT(card, 2, "clearqdbf");
1402         /* clear outbound buffers to free skbs */
1403         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1404                 if (card->qdio.out_qs[i])
1405                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1406         }
1407 }
1408
1409 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1410 {
1411         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1412
1413         if (card->qdio.no_out_queues == max)
1414                 return;
1415
1416         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1417                 qeth_free_qdio_queues(card);
1418
1419         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1420                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1421
1422         card->qdio.no_out_queues = max;
1423 }
1424
1425 static int qeth_update_from_chp_desc(struct qeth_card *card)
1426 {
1427         struct ccw_device *ccwdev;
1428         struct channel_path_desc_fmt0 *chp_dsc;
1429
1430         QETH_CARD_TEXT(card, 2, "chp_desc");
1431
1432         ccwdev = card->data.ccwdev;
1433         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1434         if (!chp_dsc)
1435                 return -ENOMEM;
1436
1437         card->info.func_level = 0x4100 + chp_dsc->desc;
1438
1439         if (IS_OSD(card) || IS_OSX(card))
1440                 /* CHPP field bit 6 == 1 -> single queue */
1441                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1442
1443         kfree(chp_dsc);
1444         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1445         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1446         return 0;
1447 }
1448
1449 static void qeth_init_qdio_info(struct qeth_card *card)
1450 {
1451         QETH_CARD_TEXT(card, 4, "intqdinf");
1452         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1453         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1454         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1455
1456         /* inbound */
1457         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1458         if (IS_IQD(card))
1459                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1460         else
1461                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1462         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1463         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1464         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1465 }
1466
1467 static void qeth_set_initial_options(struct qeth_card *card)
1468 {
1469         card->options.route4.type = NO_ROUTER;
1470         card->options.route6.type = NO_ROUTER;
1471         card->options.isolation = ISOLATION_MODE_NONE;
1472         card->options.cq = QETH_CQ_DISABLED;
1473         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1474 }
1475
1476 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1477 {
1478         unsigned long flags;
1479         int rc = 0;
1480
1481         spin_lock_irqsave(&card->thread_mask_lock, flags);
1482         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1483                         (u8) card->thread_start_mask,
1484                         (u8) card->thread_allowed_mask,
1485                         (u8) card->thread_running_mask);
1486         rc = (card->thread_start_mask & thread);
1487         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1488         return rc;
1489 }
1490
1491 static int qeth_do_reset(void *data);
1492 static void qeth_start_kernel_thread(struct work_struct *work)
1493 {
1494         struct task_struct *ts;
1495         struct qeth_card *card = container_of(work, struct qeth_card,
1496                                         kernel_thread_starter);
1497         QETH_CARD_TEXT(card, 2, "strthrd");
1498
1499         if (card->read.state != CH_STATE_UP &&
1500             card->write.state != CH_STATE_UP)
1501                 return;
1502         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1503                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1504                 if (IS_ERR(ts)) {
1505                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1506                         qeth_clear_thread_running_bit(card,
1507                                 QETH_RECOVER_THREAD);
1508                 }
1509         }
1510 }
1511
1512 static void qeth_buffer_reclaim_work(struct work_struct *);
1513 static void qeth_setup_card(struct qeth_card *card)
1514 {
1515         QETH_CARD_TEXT(card, 2, "setupcrd");
1516
1517         card->info.type = CARD_RDEV(card)->id.driver_info;
1518         card->state = CARD_STATE_DOWN;
1519         spin_lock_init(&card->lock);
1520         spin_lock_init(&card->thread_mask_lock);
1521         mutex_init(&card->conf_mutex);
1522         mutex_init(&card->discipline_mutex);
1523         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1524         INIT_LIST_HEAD(&card->cmd_waiter_list);
1525         init_waitqueue_head(&card->wait_q);
1526         qeth_set_initial_options(card);
1527         /* IP address takeover */
1528         INIT_LIST_HEAD(&card->ipato.entries);
1529         qeth_init_qdio_info(card);
1530         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1531         hash_init(card->rx_mode_addrs);
1532         hash_init(card->local_addrs4);
1533         hash_init(card->local_addrs6);
1534         spin_lock_init(&card->local_addrs4_lock);
1535         spin_lock_init(&card->local_addrs6_lock);
1536 }
1537
1538 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1539 {
1540         struct qeth_card *card = container_of(slr, struct qeth_card,
1541                                         qeth_service_level);
1542         if (card->info.mcl_level[0])
1543                 seq_printf(m, "qeth: %s firmware level %s\n",
1544                         CARD_BUS_ID(card), card->info.mcl_level);
1545 }
1546
1547 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1548 {
1549         struct qeth_card *card;
1550
1551         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1552         card = kzalloc(sizeof(*card), GFP_KERNEL);
1553         if (!card)
1554                 goto out;
1555         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1556
1557         card->gdev = gdev;
1558         dev_set_drvdata(&gdev->dev, card);
1559         CARD_RDEV(card) = gdev->cdev[0];
1560         CARD_WDEV(card) = gdev->cdev[1];
1561         CARD_DDEV(card) = gdev->cdev[2];
1562
1563         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1564                                                  dev_name(&gdev->dev));
1565         if (!card->event_wq)
1566                 goto out_wq;
1567
1568         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1569         if (!card->read_cmd)
1570                 goto out_read_cmd;
1571
1572         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1573                                            qeth_debugfs_root);
1574         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1575                             &qeth_debugfs_local_addr_fops);
1576
1577         card->qeth_service_level.seq_print = qeth_core_sl_print;
1578         register_service_level(&card->qeth_service_level);
1579         return card;
1580
1581 out_read_cmd:
1582         destroy_workqueue(card->event_wq);
1583 out_wq:
1584         dev_set_drvdata(&gdev->dev, NULL);
1585         kfree(card);
1586 out:
1587         return NULL;
1588 }
1589
1590 static int qeth_clear_channel(struct qeth_card *card,
1591                               struct qeth_channel *channel)
1592 {
1593         int rc;
1594
1595         QETH_CARD_TEXT(card, 3, "clearch");
1596         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1597         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1598         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1599
1600         if (rc)
1601                 return rc;
1602         rc = wait_event_interruptible_timeout(card->wait_q,
1603                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1604         if (rc == -ERESTARTSYS)
1605                 return rc;
1606         if (channel->state != CH_STATE_STOPPED)
1607                 return -ETIME;
1608         channel->state = CH_STATE_DOWN;
1609         return 0;
1610 }
1611
1612 static int qeth_halt_channel(struct qeth_card *card,
1613                              struct qeth_channel *channel)
1614 {
1615         int rc;
1616
1617         QETH_CARD_TEXT(card, 3, "haltch");
1618         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1619         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1620         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1621
1622         if (rc)
1623                 return rc;
1624         rc = wait_event_interruptible_timeout(card->wait_q,
1625                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1626         if (rc == -ERESTARTSYS)
1627                 return rc;
1628         if (channel->state != CH_STATE_HALTED)
1629                 return -ETIME;
1630         return 0;
1631 }
1632
1633 static int qeth_stop_channel(struct qeth_channel *channel)
1634 {
1635         struct ccw_device *cdev = channel->ccwdev;
1636         int rc;
1637
1638         rc = ccw_device_set_offline(cdev);
1639
1640         spin_lock_irq(get_ccwdev_lock(cdev));
1641         if (channel->active_cmd)
1642                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1643                         channel->active_cmd);
1644
1645         cdev->handler = NULL;
1646         spin_unlock_irq(get_ccwdev_lock(cdev));
1647
1648         return rc;
1649 }
1650
1651 static int qeth_start_channel(struct qeth_channel *channel)
1652 {
1653         struct ccw_device *cdev = channel->ccwdev;
1654         int rc;
1655
1656         channel->state = CH_STATE_DOWN;
1657         xchg(&channel->active_cmd, NULL);
1658
1659         spin_lock_irq(get_ccwdev_lock(cdev));
1660         cdev->handler = qeth_irq;
1661         spin_unlock_irq(get_ccwdev_lock(cdev));
1662
1663         rc = ccw_device_set_online(cdev);
1664         if (rc)
1665                 goto err;
1666
1667         return 0;
1668
1669 err:
1670         spin_lock_irq(get_ccwdev_lock(cdev));
1671         cdev->handler = NULL;
1672         spin_unlock_irq(get_ccwdev_lock(cdev));
1673         return rc;
1674 }
1675
1676 static int qeth_halt_channels(struct qeth_card *card)
1677 {
1678         int rc1 = 0, rc2 = 0, rc3 = 0;
1679
1680         QETH_CARD_TEXT(card, 3, "haltchs");
1681         rc1 = qeth_halt_channel(card, &card->read);
1682         rc2 = qeth_halt_channel(card, &card->write);
1683         rc3 = qeth_halt_channel(card, &card->data);
1684         if (rc1)
1685                 return rc1;
1686         if (rc2)
1687                 return rc2;
1688         return rc3;
1689 }
1690
1691 static int qeth_clear_channels(struct qeth_card *card)
1692 {
1693         int rc1 = 0, rc2 = 0, rc3 = 0;
1694
1695         QETH_CARD_TEXT(card, 3, "clearchs");
1696         rc1 = qeth_clear_channel(card, &card->read);
1697         rc2 = qeth_clear_channel(card, &card->write);
1698         rc3 = qeth_clear_channel(card, &card->data);
1699         if (rc1)
1700                 return rc1;
1701         if (rc2)
1702                 return rc2;
1703         return rc3;
1704 }
1705
1706 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1707 {
1708         int rc = 0;
1709
1710         QETH_CARD_TEXT(card, 3, "clhacrd");
1711
1712         if (halt)
1713                 rc = qeth_halt_channels(card);
1714         if (rc)
1715                 return rc;
1716         return qeth_clear_channels(card);
1717 }
1718
1719 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1720 {
1721         int rc = 0;
1722
1723         QETH_CARD_TEXT(card, 3, "qdioclr");
1724         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1725                 QETH_QDIO_CLEANING)) {
1726         case QETH_QDIO_ESTABLISHED:
1727                 if (IS_IQD(card))
1728                         rc = qdio_shutdown(CARD_DDEV(card),
1729                                 QDIO_FLAG_CLEANUP_USING_HALT);
1730                 else
1731                         rc = qdio_shutdown(CARD_DDEV(card),
1732                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1733                 if (rc)
1734                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1735                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1736                 break;
1737         case QETH_QDIO_CLEANING:
1738                 return rc;
1739         default:
1740                 break;
1741         }
1742         rc = qeth_clear_halt_card(card, use_halt);
1743         if (rc)
1744                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1745         return rc;
1746 }
1747
1748 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1749 {
1750         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1751         struct diag26c_vnic_resp *response = NULL;
1752         struct diag26c_vnic_req *request = NULL;
1753         struct ccw_dev_id id;
1754         char userid[80];
1755         int rc = 0;
1756
1757         QETH_CARD_TEXT(card, 2, "vmlayer");
1758
1759         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1760         if (rc)
1761                 goto out;
1762
1763         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1764         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1765         if (!request || !response) {
1766                 rc = -ENOMEM;
1767                 goto out;
1768         }
1769
1770         ccw_device_get_id(CARD_RDEV(card), &id);
1771         request->resp_buf_len = sizeof(*response);
1772         request->resp_version = DIAG26C_VERSION6_VM65918;
1773         request->req_format = DIAG26C_VNIC_INFO;
1774         ASCEBC(userid, 8);
1775         memcpy(&request->sys_name, userid, 8);
1776         request->devno = id.devno;
1777
1778         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1779         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1780         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1781         if (rc)
1782                 goto out;
1783         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1784
1785         if (request->resp_buf_len < sizeof(*response) ||
1786             response->version != request->resp_version) {
1787                 rc = -EIO;
1788                 goto out;
1789         }
1790
1791         if (response->protocol == VNIC_INFO_PROT_L2)
1792                 disc = QETH_DISCIPLINE_LAYER2;
1793         else if (response->protocol == VNIC_INFO_PROT_L3)
1794                 disc = QETH_DISCIPLINE_LAYER3;
1795
1796 out:
1797         kfree(response);
1798         kfree(request);
1799         if (rc)
1800                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1801         return disc;
1802 }
1803
1804 /* Determine whether the device requires a specific layer discipline */
1805 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1806 {
1807         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1808
1809         if (IS_OSM(card))
1810                 disc = QETH_DISCIPLINE_LAYER2;
1811         else if (IS_VM_NIC(card))
1812                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1813                                       qeth_vm_detect_layer(card);
1814
1815         switch (disc) {
1816         case QETH_DISCIPLINE_LAYER2:
1817                 QETH_CARD_TEXT(card, 3, "force l2");
1818                 break;
1819         case QETH_DISCIPLINE_LAYER3:
1820                 QETH_CARD_TEXT(card, 3, "force l3");
1821                 break;
1822         default:
1823                 QETH_CARD_TEXT(card, 3, "force no");
1824         }
1825
1826         return disc;
1827 }
1828
1829 static void qeth_set_blkt_defaults(struct qeth_card *card)
1830 {
1831         QETH_CARD_TEXT(card, 2, "cfgblkt");
1832
1833         if (card->info.use_v1_blkt) {
1834                 card->info.blkt.time_total = 0;
1835                 card->info.blkt.inter_packet = 0;
1836                 card->info.blkt.inter_packet_jumbo = 0;
1837         } else {
1838                 card->info.blkt.time_total = 250;
1839                 card->info.blkt.inter_packet = 5;
1840                 card->info.blkt.inter_packet_jumbo = 15;
1841         }
1842 }
1843
1844 static void qeth_idx_init(struct qeth_card *card)
1845 {
1846         memset(&card->seqno, 0, sizeof(card->seqno));
1847
1848         card->token.issuer_rm_w = 0x00010103UL;
1849         card->token.cm_filter_w = 0x00010108UL;
1850         card->token.cm_connection_w = 0x0001010aUL;
1851         card->token.ulp_filter_w = 0x0001010bUL;
1852         card->token.ulp_connection_w = 0x0001010dUL;
1853
1854         switch (card->info.type) {
1855         case QETH_CARD_TYPE_IQD:
1856                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1857                 break;
1858         case QETH_CARD_TYPE_OSD:
1859                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1860                 break;
1861         default:
1862                 break;
1863         }
1864 }
1865
1866 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1867                                   struct qeth_cmd_buffer *iob)
1868 {
1869         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1870                QETH_SEQ_NO_LENGTH);
1871         if (iob->channel == &card->write)
1872                 card->seqno.trans_hdr++;
1873 }
1874
1875 static int qeth_peer_func_level(int level)
1876 {
1877         if ((level & 0xff) == 8)
1878                 return (level & 0xff) + 0x400;
1879         if (((level >> 8) & 3) == 1)
1880                 return (level & 0xff) + 0x200;
1881         return level;
1882 }
1883
1884 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1885                                   struct qeth_cmd_buffer *iob)
1886 {
1887         qeth_idx_finalize_cmd(card, iob);
1888
1889         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1890                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1891         card->seqno.pdu_hdr++;
1892         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1893                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1894
1895         iob->callback = qeth_release_buffer_cb;
1896 }
1897
1898 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1899                                  struct qeth_cmd_buffer *reply)
1900 {
1901         /* MPC cmds are issued strictly in sequence. */
1902         return !IS_IPA(reply->data);
1903 }
1904
1905 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1906                                                   const void *data,
1907                                                   unsigned int data_length)
1908 {
1909         struct qeth_cmd_buffer *iob;
1910
1911         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1912         if (!iob)
1913                 return NULL;
1914
1915         memcpy(iob->data, data, data_length);
1916         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1917                        iob->data);
1918         iob->finalize = qeth_mpc_finalize_cmd;
1919         iob->match = qeth_mpc_match_reply;
1920         return iob;
1921 }
1922
1923 /**
1924  * qeth_send_control_data() -   send control command to the card
1925  * @card:                       qeth_card structure pointer
1926  * @iob:                        qeth_cmd_buffer pointer
1927  * @reply_cb:                   callback function pointer
1928  *  cb_card:                    pointer to the qeth_card structure
1929  *  cb_reply:                   pointer to the qeth_reply structure
1930  *  cb_cmd:                     pointer to the original iob for non-IPA
1931  *                              commands, or to the qeth_ipa_cmd structure
1932  *                              for the IPA commands.
1933  * @reply_param:                private pointer passed to the callback
1934  *
1935  * Callback function gets called one or more times, with cb_cmd
1936  * pointing to the response returned by the hardware. Callback
1937  * function must return
1938  *   > 0 if more reply blocks are expected,
1939  *     0 if the last or only reply block is received, and
1940  *   < 0 on error.
1941  * Callback function can get the value of the reply_param pointer from the
1942  * field 'param' of the structure qeth_reply.
1943  */
1944
1945 static int qeth_send_control_data(struct qeth_card *card,
1946                                   struct qeth_cmd_buffer *iob,
1947                                   int (*reply_cb)(struct qeth_card *cb_card,
1948                                                   struct qeth_reply *cb_reply,
1949                                                   unsigned long cb_cmd),
1950                                   void *reply_param)
1951 {
1952         struct qeth_channel *channel = iob->channel;
1953         struct qeth_reply *reply = &iob->reply;
1954         long timeout = iob->timeout;
1955         int rc;
1956
1957         QETH_CARD_TEXT(card, 2, "sendctl");
1958
1959         reply->callback = reply_cb;
1960         reply->param = reply_param;
1961
1962         timeout = wait_event_interruptible_timeout(card->wait_q,
1963                                                    qeth_trylock_channel(channel, iob),
1964                                                    timeout);
1965         if (timeout <= 0) {
1966                 qeth_put_cmd(iob);
1967                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1968         }
1969
1970         if (iob->finalize)
1971                 iob->finalize(card, iob);
1972         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1973
1974         qeth_enqueue_cmd(card, iob);
1975
1976         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1977         qeth_get_cmd(iob);
1978
1979         QETH_CARD_TEXT(card, 6, "noirqpnd");
1980         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1981         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1982                                       (addr_t) iob, 0, 0, timeout);
1983         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1984         if (rc) {
1985                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1986                                  CARD_DEVID(card), rc);
1987                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1988                 qeth_dequeue_cmd(card, iob);
1989                 qeth_put_cmd(iob);
1990                 qeth_unlock_channel(card, channel);
1991                 goto out;
1992         }
1993
1994         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1995                                                             timeout);
1996         if (timeout <= 0)
1997                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1998
1999         qeth_dequeue_cmd(card, iob);
2000
2001         if (reply_cb) {
2002                 /* Wait until the callback for a late reply has completed: */
2003                 spin_lock_irq(&iob->lock);
2004                 if (rc)
2005                         /* Zap any callback that's still pending: */
2006                         iob->rc = rc;
2007                 spin_unlock_irq(&iob->lock);
2008         }
2009
2010         if (!rc)
2011                 rc = iob->rc;
2012
2013 out:
2014         qeth_put_cmd(iob);
2015         return rc;
2016 }
2017
2018 struct qeth_node_desc {
2019         struct node_descriptor nd1;
2020         struct node_descriptor nd2;
2021         struct node_descriptor nd3;
2022 };
2023
2024 static void qeth_read_conf_data_cb(struct qeth_card *card,
2025                                    struct qeth_cmd_buffer *iob,
2026                                    unsigned int data_length)
2027 {
2028         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2029         int rc = 0;
2030         u8 *tag;
2031
2032         QETH_CARD_TEXT(card, 2, "cfgunit");
2033
2034         if (data_length < sizeof(*nd)) {
2035                 rc = -EINVAL;
2036                 goto out;
2037         }
2038
2039         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2040                                nd->nd1.plant[1] == _ascebc['M'];
2041         tag = (u8 *)&nd->nd1.tag;
2042         card->info.chpid = tag[0];
2043         card->info.unit_addr2 = tag[1];
2044
2045         tag = (u8 *)&nd->nd2.tag;
2046         card->info.cula = tag[1];
2047
2048         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2049                                  nd->nd3.model[1] == 0xF0 &&
2050                                  nd->nd3.model[2] >= 0xF1 &&
2051                                  nd->nd3.model[2] <= 0xF4;
2052
2053 out:
2054         qeth_notify_cmd(iob, rc);
2055         qeth_put_cmd(iob);
2056 }
2057
2058 static int qeth_read_conf_data(struct qeth_card *card)
2059 {
2060         struct qeth_channel *channel = &card->data;
2061         struct qeth_cmd_buffer *iob;
2062         struct ciw *ciw;
2063
2064         /* scan for RCD command in extended SenseID data */
2065         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2066         if (!ciw || ciw->cmd == 0)
2067                 return -EOPNOTSUPP;
2068         if (ciw->count < sizeof(struct qeth_node_desc))
2069                 return -EINVAL;
2070
2071         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2072         if (!iob)
2073                 return -ENOMEM;
2074
2075         iob->callback = qeth_read_conf_data_cb;
2076         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2077                        iob->data);
2078
2079         return qeth_send_control_data(card, iob, NULL, NULL);
2080 }
2081
2082 static int qeth_idx_check_activate_response(struct qeth_card *card,
2083                                             struct qeth_channel *channel,
2084                                             struct qeth_cmd_buffer *iob)
2085 {
2086         int rc;
2087
2088         rc = qeth_check_idx_response(card, iob->data);
2089         if (rc)
2090                 return rc;
2091
2092         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2093                 return 0;
2094
2095         /* negative reply: */
2096         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2097                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2098
2099         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2100         case QETH_IDX_ACT_ERR_EXCL:
2101                 dev_err(&channel->ccwdev->dev,
2102                         "The adapter is used exclusively by another host\n");
2103                 return -EBUSY;
2104         case QETH_IDX_ACT_ERR_AUTH:
2105         case QETH_IDX_ACT_ERR_AUTH_USER:
2106                 dev_err(&channel->ccwdev->dev,
2107                         "Setting the device online failed because of insufficient authorization\n");
2108                 return -EPERM;
2109         default:
2110                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2111                                  CCW_DEVID(channel->ccwdev));
2112                 return -EIO;
2113         }
2114 }
2115
2116 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2117                                               struct qeth_cmd_buffer *iob,
2118                                               unsigned int data_length)
2119 {
2120         struct qeth_channel *channel = iob->channel;
2121         u16 peer_level;
2122         int rc;
2123
2124         QETH_CARD_TEXT(card, 2, "idxrdcb");
2125
2126         rc = qeth_idx_check_activate_response(card, channel, iob);
2127         if (rc)
2128                 goto out;
2129
2130         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2131         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2132                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2133                                  CCW_DEVID(channel->ccwdev),
2134                                  card->info.func_level, peer_level);
2135                 rc = -EINVAL;
2136                 goto out;
2137         }
2138
2139         memcpy(&card->token.issuer_rm_r,
2140                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2141                QETH_MPC_TOKEN_LENGTH);
2142         memcpy(&card->info.mcl_level[0],
2143                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2144
2145 out:
2146         qeth_notify_cmd(iob, rc);
2147         qeth_put_cmd(iob);
2148 }
2149
2150 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2151                                                struct qeth_cmd_buffer *iob,
2152                                                unsigned int data_length)
2153 {
2154         struct qeth_channel *channel = iob->channel;
2155         u16 peer_level;
2156         int rc;
2157
2158         QETH_CARD_TEXT(card, 2, "idxwrcb");
2159
2160         rc = qeth_idx_check_activate_response(card, channel, iob);
2161         if (rc)
2162                 goto out;
2163
2164         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2165         if ((peer_level & ~0x0100) !=
2166             qeth_peer_func_level(card->info.func_level)) {
2167                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2168                                  CCW_DEVID(channel->ccwdev),
2169                                  card->info.func_level, peer_level);
2170                 rc = -EINVAL;
2171         }
2172
2173 out:
2174         qeth_notify_cmd(iob, rc);
2175         qeth_put_cmd(iob);
2176 }
2177
2178 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2179                                         struct qeth_cmd_buffer *iob)
2180 {
2181         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2182         u8 port = ((u8)card->dev->dev_port) | 0x80;
2183         struct ccw1 *ccw = __ccw_from_cmd(iob);
2184
2185         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2186                        iob->data);
2187         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2188         iob->finalize = qeth_idx_finalize_cmd;
2189
2190         port |= QETH_IDX_ACT_INVAL_FRAME;
2191         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2192         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2193                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2194         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2195                &card->info.func_level, 2);
2196         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2197         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2198 }
2199
2200 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2201 {
2202         struct qeth_channel *channel = &card->read;
2203         struct qeth_cmd_buffer *iob;
2204         int rc;
2205
2206         QETH_CARD_TEXT(card, 2, "idxread");
2207
2208         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2209         if (!iob)
2210                 return -ENOMEM;
2211
2212         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2213         qeth_idx_setup_activate_cmd(card, iob);
2214         iob->callback = qeth_idx_activate_read_channel_cb;
2215
2216         rc = qeth_send_control_data(card, iob, NULL, NULL);
2217         if (rc)
2218                 return rc;
2219
2220         channel->state = CH_STATE_UP;
2221         return 0;
2222 }
2223
2224 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2225 {
2226         struct qeth_channel *channel = &card->write;
2227         struct qeth_cmd_buffer *iob;
2228         int rc;
2229
2230         QETH_CARD_TEXT(card, 2, "idxwrite");
2231
2232         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2233         if (!iob)
2234                 return -ENOMEM;
2235
2236         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2237         qeth_idx_setup_activate_cmd(card, iob);
2238         iob->callback = qeth_idx_activate_write_channel_cb;
2239
2240         rc = qeth_send_control_data(card, iob, NULL, NULL);
2241         if (rc)
2242                 return rc;
2243
2244         channel->state = CH_STATE_UP;
2245         return 0;
2246 }
2247
2248 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2249                 unsigned long data)
2250 {
2251         struct qeth_cmd_buffer *iob;
2252
2253         QETH_CARD_TEXT(card, 2, "cmenblcb");
2254
2255         iob = (struct qeth_cmd_buffer *) data;
2256         memcpy(&card->token.cm_filter_r,
2257                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2258                QETH_MPC_TOKEN_LENGTH);
2259         return 0;
2260 }
2261
2262 static int qeth_cm_enable(struct qeth_card *card)
2263 {
2264         struct qeth_cmd_buffer *iob;
2265
2266         QETH_CARD_TEXT(card, 2, "cmenable");
2267
2268         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2269         if (!iob)
2270                 return -ENOMEM;
2271
2272         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2273                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2274         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2275                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2276
2277         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2278 }
2279
2280 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2281                 unsigned long data)
2282 {
2283         struct qeth_cmd_buffer *iob;
2284
2285         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2286
2287         iob = (struct qeth_cmd_buffer *) data;
2288         memcpy(&card->token.cm_connection_r,
2289                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2290                QETH_MPC_TOKEN_LENGTH);
2291         return 0;
2292 }
2293
2294 static int qeth_cm_setup(struct qeth_card *card)
2295 {
2296         struct qeth_cmd_buffer *iob;
2297
2298         QETH_CARD_TEXT(card, 2, "cmsetup");
2299
2300         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2301         if (!iob)
2302                 return -ENOMEM;
2303
2304         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2305                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2306         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2307                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2308         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2309                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2310         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2311 }
2312
2313 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2314 {
2315         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2316             link_type == QETH_LINK_TYPE_HSTR) {
2317                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2318                 return false;
2319         }
2320
2321         return true;
2322 }
2323
2324 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2325 {
2326         struct net_device *dev = card->dev;
2327         unsigned int new_mtu;
2328
2329         if (!max_mtu) {
2330                 /* IQD needs accurate max MTU to set up its RX buffers: */
2331                 if (IS_IQD(card))
2332                         return -EINVAL;
2333                 /* tolerate quirky HW: */
2334                 max_mtu = ETH_MAX_MTU;
2335         }
2336
2337         rtnl_lock();
2338         if (IS_IQD(card)) {
2339                 /* move any device with default MTU to new max MTU: */
2340                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2341
2342                 /* adjust RX buffer size to new max MTU: */
2343                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2344                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2345                         qeth_free_qdio_queues(card);
2346         } else {
2347                 if (dev->mtu)
2348                         new_mtu = dev->mtu;
2349                 /* default MTUs for first setup: */
2350                 else if (IS_LAYER2(card))
2351                         new_mtu = ETH_DATA_LEN;
2352                 else
2353                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2354         }
2355
2356         dev->max_mtu = max_mtu;
2357         dev->mtu = min(new_mtu, max_mtu);
2358         rtnl_unlock();
2359         return 0;
2360 }
2361
2362 static int qeth_get_mtu_outof_framesize(int framesize)
2363 {
2364         switch (framesize) {
2365         case 0x4000:
2366                 return 8192;
2367         case 0x6000:
2368                 return 16384;
2369         case 0xa000:
2370                 return 32768;
2371         case 0xffff:
2372                 return 57344;
2373         default:
2374                 return 0;
2375         }
2376 }
2377
2378 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2379                 unsigned long data)
2380 {
2381         __u16 mtu, framesize;
2382         __u16 len;
2383         struct qeth_cmd_buffer *iob;
2384         u8 link_type = 0;
2385
2386         QETH_CARD_TEXT(card, 2, "ulpenacb");
2387
2388         iob = (struct qeth_cmd_buffer *) data;
2389         memcpy(&card->token.ulp_filter_r,
2390                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2391                QETH_MPC_TOKEN_LENGTH);
2392         if (IS_IQD(card)) {
2393                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2394                 mtu = qeth_get_mtu_outof_framesize(framesize);
2395         } else {
2396                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2397         }
2398         *(u16 *)reply->param = mtu;
2399
2400         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2401         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2402                 memcpy(&link_type,
2403                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2404                 if (!qeth_is_supported_link_type(card, link_type))
2405                         return -EPROTONOSUPPORT;
2406         }
2407
2408         card->info.link_type = link_type;
2409         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2410         return 0;
2411 }
2412
2413 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2414 {
2415         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2416 }
2417
2418 static int qeth_ulp_enable(struct qeth_card *card)
2419 {
2420         u8 prot_type = qeth_mpc_select_prot_type(card);
2421         struct qeth_cmd_buffer *iob;
2422         u16 max_mtu;
2423         int rc;
2424
2425         QETH_CARD_TEXT(card, 2, "ulpenabl");
2426
2427         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2428         if (!iob)
2429                 return -ENOMEM;
2430
2431         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2432         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2433         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2434                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2435         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2436                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2437         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2438         if (rc)
2439                 return rc;
2440         return qeth_update_max_mtu(card, max_mtu);
2441 }
2442
2443 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2444                 unsigned long data)
2445 {
2446         struct qeth_cmd_buffer *iob;
2447
2448         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2449
2450         iob = (struct qeth_cmd_buffer *) data;
2451         memcpy(&card->token.ulp_connection_r,
2452                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2453                QETH_MPC_TOKEN_LENGTH);
2454         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2455                      3)) {
2456                 QETH_CARD_TEXT(card, 2, "olmlimit");
2457                 dev_err(&card->gdev->dev, "A connection could not be "
2458                         "established because of an OLM limit\n");
2459                 return -EMLINK;
2460         }
2461         return 0;
2462 }
2463
2464 static int qeth_ulp_setup(struct qeth_card *card)
2465 {
2466         __u16 temp;
2467         struct qeth_cmd_buffer *iob;
2468
2469         QETH_CARD_TEXT(card, 2, "ulpsetup");
2470
2471         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2472         if (!iob)
2473                 return -ENOMEM;
2474
2475         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2476                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2477         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2478                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2479         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2480                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2481
2482         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2483         temp = (card->info.cula << 8) + card->info.unit_addr2;
2484         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2485         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2486 }
2487
2488 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2489                               gfp_t gfp)
2490 {
2491         struct qeth_qdio_out_buffer *newbuf;
2492
2493         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2494         if (!newbuf)
2495                 return -ENOMEM;
2496
2497         newbuf->buffer = q->qdio_bufs[bidx];
2498         skb_queue_head_init(&newbuf->skb_list);
2499         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2500         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2501         q->bufs[bidx] = newbuf;
2502         return 0;
2503 }
2504
2505 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2506 {
2507         if (!q)
2508                 return;
2509
2510         qeth_drain_output_queue(q, true);
2511         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2512         kfree(q);
2513 }
2514
2515 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2516 {
2517         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2518         unsigned int i;
2519
2520         if (!q)
2521                 return NULL;
2522
2523         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2524                 goto err_qdio_bufs;
2525
2526         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2527                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2528                         goto err_out_bufs;
2529         }
2530
2531         return q;
2532
2533 err_out_bufs:
2534         while (i > 0)
2535                 qeth_free_out_buf(q->bufs[--i]);
2536         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2537 err_qdio_bufs:
2538         kfree(q);
2539         return NULL;
2540 }
2541
2542 static void qeth_tx_completion_timer(struct timer_list *timer)
2543 {
2544         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2545
2546         napi_schedule(&queue->napi);
2547         QETH_TXQ_STAT_INC(queue, completion_timer);
2548 }
2549
2550 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2551 {
2552         unsigned int i;
2553
2554         QETH_CARD_TEXT(card, 2, "allcqdbf");
2555
2556         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2557                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2558                 return 0;
2559
2560         QETH_CARD_TEXT(card, 2, "inq");
2561         card->qdio.in_q = qeth_alloc_qdio_queue();
2562         if (!card->qdio.in_q)
2563                 goto out_nomem;
2564
2565         /* inbound buffer pool */
2566         if (qeth_alloc_buffer_pool(card))
2567                 goto out_freeinq;
2568
2569         /* outbound */
2570         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2571                 struct qeth_qdio_out_q *queue;
2572
2573                 queue = qeth_alloc_output_queue();
2574                 if (!queue)
2575                         goto out_freeoutq;
2576                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2577                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2578                 card->qdio.out_qs[i] = queue;
2579                 queue->card = card;
2580                 queue->queue_no = i;
2581                 INIT_LIST_HEAD(&queue->pending_bufs);
2582                 spin_lock_init(&queue->lock);
2583                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2584                 if (IS_IQD(card)) {
2585                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2586                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2587                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2588                 } else {
2589                         queue->coalesce_usecs = USEC_PER_SEC;
2590                         queue->max_coalesced_frames = 0;
2591                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2592                 }
2593                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2594         }
2595
2596         /* completion */
2597         if (qeth_alloc_cq(card))
2598                 goto out_freeoutq;
2599
2600         return 0;
2601
2602 out_freeoutq:
2603         while (i > 0) {
2604                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2605                 card->qdio.out_qs[i] = NULL;
2606         }
2607         qeth_free_buffer_pool(card);
2608 out_freeinq:
2609         qeth_free_qdio_queue(card->qdio.in_q);
2610         card->qdio.in_q = NULL;
2611 out_nomem:
2612         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2613         return -ENOMEM;
2614 }
2615
2616 static void qeth_free_qdio_queues(struct qeth_card *card)
2617 {
2618         int i, j;
2619
2620         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2621                 QETH_QDIO_UNINITIALIZED)
2622                 return;
2623
2624         qeth_free_cq(card);
2625         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2626                 if (card->qdio.in_q->bufs[j].rx_skb)
2627                         consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2628         }
2629         qeth_free_qdio_queue(card->qdio.in_q);
2630         card->qdio.in_q = NULL;
2631         /* inbound buffer pool */
2632         qeth_free_buffer_pool(card);
2633         /* free outbound qdio_qs */
2634         for (i = 0; i < card->qdio.no_out_queues; i++) {
2635                 qeth_free_output_queue(card->qdio.out_qs[i]);
2636                 card->qdio.out_qs[i] = NULL;
2637         }
2638 }
2639
2640 static void qeth_fill_qib_parms(struct qeth_card *card,
2641                                 struct qeth_qib_parms *parms)
2642 {
2643         struct qeth_qdio_out_q *queue;
2644         unsigned int i;
2645
2646         parms->pcit_magic[0] = 'P';
2647         parms->pcit_magic[1] = 'C';
2648         parms->pcit_magic[2] = 'I';
2649         parms->pcit_magic[3] = 'T';
2650         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2651         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2652         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2653         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2654
2655         parms->blkt_magic[0] = 'B';
2656         parms->blkt_magic[1] = 'L';
2657         parms->blkt_magic[2] = 'K';
2658         parms->blkt_magic[3] = 'T';
2659         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2660         parms->blkt_total = card->info.blkt.time_total;
2661         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2662         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2663
2664         /* Prio-queueing implicitly uses the default priorities: */
2665         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2666                 return;
2667
2668         parms->pque_magic[0] = 'P';
2669         parms->pque_magic[1] = 'Q';
2670         parms->pque_magic[2] = 'U';
2671         parms->pque_magic[3] = 'E';
2672         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2673         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2674         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2675
2676         qeth_for_each_output_queue(card, queue, i)
2677                 parms->pque_priority[i] = queue->priority;
2678 }
2679
2680 static int qeth_qdio_activate(struct qeth_card *card)
2681 {
2682         QETH_CARD_TEXT(card, 3, "qdioact");
2683         return qdio_activate(CARD_DDEV(card));
2684 }
2685
2686 static int qeth_dm_act(struct qeth_card *card)
2687 {
2688         struct qeth_cmd_buffer *iob;
2689
2690         QETH_CARD_TEXT(card, 2, "dmact");
2691
2692         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2693         if (!iob)
2694                 return -ENOMEM;
2695
2696         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2697                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2698         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2699                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2700         return qeth_send_control_data(card, iob, NULL, NULL);
2701 }
2702
2703 static int qeth_mpc_initialize(struct qeth_card *card)
2704 {
2705         int rc;
2706
2707         QETH_CARD_TEXT(card, 2, "mpcinit");
2708
2709         rc = qeth_issue_next_read(card);
2710         if (rc) {
2711                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2712                 return rc;
2713         }
2714         rc = qeth_cm_enable(card);
2715         if (rc) {
2716                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2717                 return rc;
2718         }
2719         rc = qeth_cm_setup(card);
2720         if (rc) {
2721                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2722                 return rc;
2723         }
2724         rc = qeth_ulp_enable(card);
2725         if (rc) {
2726                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2727                 return rc;
2728         }
2729         rc = qeth_ulp_setup(card);
2730         if (rc) {
2731                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2732                 return rc;
2733         }
2734         rc = qeth_alloc_qdio_queues(card);
2735         if (rc) {
2736                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2737                 return rc;
2738         }
2739         rc = qeth_qdio_establish(card);
2740         if (rc) {
2741                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2742                 qeth_free_qdio_queues(card);
2743                 return rc;
2744         }
2745         rc = qeth_qdio_activate(card);
2746         if (rc) {
2747                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2748                 return rc;
2749         }
2750         rc = qeth_dm_act(card);
2751         if (rc) {
2752                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2753                 return rc;
2754         }
2755
2756         return 0;
2757 }
2758
2759 static void qeth_print_status_message(struct qeth_card *card)
2760 {
2761         switch (card->info.type) {
2762         case QETH_CARD_TYPE_OSD:
2763         case QETH_CARD_TYPE_OSM:
2764         case QETH_CARD_TYPE_OSX:
2765                 /* VM will use a non-zero first character
2766                  * to indicate a HiperSockets like reporting
2767                  * of the level OSA sets the first character to zero
2768                  * */
2769                 if (!card->info.mcl_level[0]) {
2770                         sprintf(card->info.mcl_level, "%02x%02x",
2771                                 card->info.mcl_level[2],
2772                                 card->info.mcl_level[3]);
2773                         break;
2774                 }
2775                 fallthrough;
2776         case QETH_CARD_TYPE_IQD:
2777                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2778                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2779                                 card->info.mcl_level[0]];
2780                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2781                                 card->info.mcl_level[1]];
2782                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2783                                 card->info.mcl_level[2]];
2784                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2785                                 card->info.mcl_level[3]];
2786                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2787                 }
2788                 break;
2789         default:
2790                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2791         }
2792         dev_info(&card->gdev->dev,
2793                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2794                  qeth_get_cardname(card),
2795                  (card->info.mcl_level[0]) ? " (level: " : "",
2796                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2797                  (card->info.mcl_level[0]) ? ")" : "",
2798                  qeth_get_cardname_short(card));
2799 }
2800
2801 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2802 {
2803         struct qeth_buffer_pool_entry *entry;
2804
2805         QETH_CARD_TEXT(card, 5, "inwrklst");
2806
2807         list_for_each_entry(entry,
2808                             &card->qdio.init_pool.entry_list, init_list) {
2809                 qeth_put_buffer_pool_entry(card, entry);
2810         }
2811 }
2812
2813 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2814                                         struct qeth_card *card)
2815 {
2816         struct qeth_buffer_pool_entry *entry;
2817         int i, free;
2818
2819         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2820                 return NULL;
2821
2822         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2823                 free = 1;
2824                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2825                         if (page_count(entry->elements[i]) > 1) {
2826                                 free = 0;
2827                                 break;
2828                         }
2829                 }
2830                 if (free) {
2831                         list_del_init(&entry->list);
2832                         return entry;
2833                 }
2834         }
2835
2836         /* no free buffer in pool so take first one and swap pages */
2837         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2838                                  struct qeth_buffer_pool_entry, list);
2839         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2840                 if (page_count(entry->elements[i]) > 1) {
2841                         struct page *page = dev_alloc_page();
2842
2843                         if (!page)
2844                                 return NULL;
2845
2846                         __free_page(entry->elements[i]);
2847                         entry->elements[i] = page;
2848                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2849                 }
2850         }
2851         list_del_init(&entry->list);
2852         return entry;
2853 }
2854
2855 static int qeth_init_input_buffer(struct qeth_card *card,
2856                 struct qeth_qdio_buffer *buf)
2857 {
2858         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2859         int i;
2860
2861         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2862                 buf->rx_skb = netdev_alloc_skb(card->dev,
2863                                                ETH_HLEN +
2864                                                sizeof(struct ipv6hdr));
2865                 if (!buf->rx_skb)
2866                         return -ENOMEM;
2867         }
2868
2869         if (!pool_entry) {
2870                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2871                 if (!pool_entry)
2872                         return -ENOBUFS;
2873
2874                 buf->pool_entry = pool_entry;
2875         }
2876
2877         /*
2878          * since the buffer is accessed only from the input_tasklet
2879          * there shouldn't be a need to synchronize; also, since we use
2880          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2881          * buffers
2882          */
2883         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2884                 buf->buffer->element[i].length = PAGE_SIZE;
2885                 buf->buffer->element[i].addr =
2886                         page_to_phys(pool_entry->elements[i]);
2887                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2888                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2889                 else
2890                         buf->buffer->element[i].eflags = 0;
2891                 buf->buffer->element[i].sflags = 0;
2892         }
2893         return 0;
2894 }
2895
2896 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2897                                             struct qeth_qdio_out_q *queue)
2898 {
2899         if (!IS_IQD(card) ||
2900             qeth_iqd_is_mcast_queue(card, queue) ||
2901             card->options.cq == QETH_CQ_ENABLED ||
2902             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2903                 return 1;
2904
2905         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2906 }
2907
2908 static int qeth_init_qdio_queues(struct qeth_card *card)
2909 {
2910         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2911         unsigned int i;
2912         int rc;
2913
2914         QETH_CARD_TEXT(card, 2, "initqdqs");
2915
2916         /* inbound queue */
2917         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2918         memset(&card->rx, 0, sizeof(struct qeth_rx));
2919
2920         qeth_initialize_working_pool_list(card);
2921         /*give only as many buffers to hardware as we have buffer pool entries*/
2922         for (i = 0; i < rx_bufs; i++) {
2923                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2924                 if (rc)
2925                         return rc;
2926         }
2927
2928         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2929         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs,
2930                      NULL);
2931         if (rc) {
2932                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2933                 return rc;
2934         }
2935
2936         /* completion */
2937         rc = qeth_cq_init(card);
2938         if (rc) {
2939                 return rc;
2940         }
2941
2942         /* outbound queue */
2943         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2944                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2945
2946                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2947                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2948                 queue->next_buf_to_fill = 0;
2949                 queue->do_pack = 0;
2950                 queue->prev_hdr = NULL;
2951                 queue->coalesced_frames = 0;
2952                 queue->bulk_start = 0;
2953                 queue->bulk_count = 0;
2954                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2955                 atomic_set(&queue->used_buffers, 0);
2956                 atomic_set(&queue->set_pci_flags_count, 0);
2957                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2958         }
2959         return 0;
2960 }
2961
2962 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2963                                   struct qeth_cmd_buffer *iob)
2964 {
2965         qeth_mpc_finalize_cmd(card, iob);
2966
2967         /* override with IPA-specific values: */
2968         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2969 }
2970
2971 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
2972                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
2973 {
2974         u8 prot_type = qeth_mpc_select_prot_type(card);
2975         u16 total_length = iob->length;
2976
2977         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2978                        iob->data);
2979         iob->finalize = qeth_ipa_finalize_cmd;
2980
2981         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2982         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2983         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2984         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2985         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2986         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2987                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2988         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2989 }
2990
2991 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
2992                                  struct qeth_cmd_buffer *reply)
2993 {
2994         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
2995
2996         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
2997 }
2998
2999 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3000                                            enum qeth_ipa_cmds cmd_code,
3001                                            enum qeth_prot_versions prot,
3002                                            unsigned int data_length)
3003 {
3004         struct qeth_cmd_buffer *iob;
3005         struct qeth_ipacmd_hdr *hdr;
3006
3007         data_length += offsetof(struct qeth_ipa_cmd, data);
3008         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3009                              QETH_IPA_TIMEOUT);
3010         if (!iob)
3011                 return NULL;
3012
3013         qeth_prepare_ipa_cmd(card, iob, data_length);
3014         iob->match = qeth_ipa_match_reply;
3015
3016         hdr = &__ipa_cmd(iob)->hdr;
3017         hdr->command = cmd_code;
3018         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3019         /* hdr->seqno is set by qeth_send_control_data() */
3020         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3021         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3022         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3023         hdr->param_count = 1;
3024         hdr->prot_version = prot;
3025         return iob;
3026 }
3027 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3028
3029 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3030                                 struct qeth_reply *reply, unsigned long data)
3031 {
3032         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3033
3034         return (cmd->hdr.return_code) ? -EIO : 0;
3035 }
3036
3037 /*
3038  * qeth_send_ipa_cmd() - send an IPA command
3039  *
3040  * See qeth_send_control_data() for explanation of the arguments.
3041  */
3042
3043 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3044                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3045                         unsigned long),
3046                 void *reply_param)
3047 {
3048         int rc;
3049
3050         QETH_CARD_TEXT(card, 4, "sendipa");
3051
3052         if (card->read_or_write_problem) {
3053                 qeth_put_cmd(iob);
3054                 return -EIO;
3055         }
3056
3057         if (reply_cb == NULL)
3058                 reply_cb = qeth_send_ipa_cmd_cb;
3059         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3060         if (rc == -ETIME) {
3061                 qeth_clear_ipacmd_list(card);
3062                 qeth_schedule_recovery(card);
3063         }
3064         return rc;
3065 }
3066 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3067
3068 static int qeth_send_startlan_cb(struct qeth_card *card,
3069                                  struct qeth_reply *reply, unsigned long data)
3070 {
3071         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3072
3073         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3074                 return -ENETDOWN;
3075
3076         return (cmd->hdr.return_code) ? -EIO : 0;
3077 }
3078
3079 static int qeth_send_startlan(struct qeth_card *card)
3080 {
3081         struct qeth_cmd_buffer *iob;
3082
3083         QETH_CARD_TEXT(card, 2, "strtlan");
3084
3085         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3086         if (!iob)
3087                 return -ENOMEM;
3088         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3089 }
3090
3091 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3092 {
3093         if (!cmd->hdr.return_code)
3094                 cmd->hdr.return_code =
3095                         cmd->data.setadapterparms.hdr.return_code;
3096         return cmd->hdr.return_code;
3097 }
3098
3099 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3100                 struct qeth_reply *reply, unsigned long data)
3101 {
3102         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3103         struct qeth_query_cmds_supp *query_cmd;
3104
3105         QETH_CARD_TEXT(card, 3, "quyadpcb");
3106         if (qeth_setadpparms_inspect_rc(cmd))
3107                 return -EIO;
3108
3109         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3110         if (query_cmd->lan_type & 0x7f) {
3111                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3112                         return -EPROTONOSUPPORT;
3113
3114                 card->info.link_type = query_cmd->lan_type;
3115                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3116         }
3117
3118         card->options.adp.supported = query_cmd->supported_cmds;
3119         return 0;
3120 }
3121
3122 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3123                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3124                                                     unsigned int data_length)
3125 {
3126         struct qeth_ipacmd_setadpparms_hdr *hdr;
3127         struct qeth_cmd_buffer *iob;
3128
3129         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3130                                  data_length +
3131                                  offsetof(struct qeth_ipacmd_setadpparms,
3132                                           data));
3133         if (!iob)
3134                 return NULL;
3135
3136         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3137         hdr->cmdlength = sizeof(*hdr) + data_length;
3138         hdr->command_code = adp_cmd;
3139         hdr->used_total = 1;
3140         hdr->seq_no = 1;
3141         return iob;
3142 }
3143
3144 static int qeth_query_setadapterparms(struct qeth_card *card)
3145 {
3146         int rc;
3147         struct qeth_cmd_buffer *iob;
3148
3149         QETH_CARD_TEXT(card, 3, "queryadp");
3150         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3151                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3152         if (!iob)
3153                 return -ENOMEM;
3154         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3155         return rc;
3156 }
3157
3158 static int qeth_query_ipassists_cb(struct qeth_card *card,
3159                 struct qeth_reply *reply, unsigned long data)
3160 {
3161         struct qeth_ipa_cmd *cmd;
3162
3163         QETH_CARD_TEXT(card, 2, "qipasscb");
3164
3165         cmd = (struct qeth_ipa_cmd *) data;
3166
3167         switch (cmd->hdr.return_code) {
3168         case IPA_RC_SUCCESS:
3169                 break;
3170         case IPA_RC_NOTSUPP:
3171         case IPA_RC_L2_UNSUPPORTED_CMD:
3172                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3173                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3174                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3175                 return -EOPNOTSUPP;
3176         default:
3177                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3178                                  CARD_DEVID(card), cmd->hdr.return_code);
3179                 return -EIO;
3180         }
3181
3182         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3183                 card->options.ipa4 = cmd->hdr.assists;
3184         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3185                 card->options.ipa6 = cmd->hdr.assists;
3186         else
3187                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3188                                  CARD_DEVID(card));
3189         return 0;
3190 }
3191
3192 static int qeth_query_ipassists(struct qeth_card *card,
3193                                 enum qeth_prot_versions prot)
3194 {
3195         int rc;
3196         struct qeth_cmd_buffer *iob;
3197
3198         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3199         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3200         if (!iob)
3201                 return -ENOMEM;
3202         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3203         return rc;
3204 }
3205
3206 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3207                                 struct qeth_reply *reply, unsigned long data)
3208 {
3209         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3210         struct qeth_query_switch_attributes *attrs;
3211         struct qeth_switch_info *sw_info;
3212
3213         QETH_CARD_TEXT(card, 2, "qswiatcb");
3214         if (qeth_setadpparms_inspect_rc(cmd))
3215                 return -EIO;
3216
3217         sw_info = (struct qeth_switch_info *)reply->param;
3218         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3219         sw_info->capabilities = attrs->capabilities;
3220         sw_info->settings = attrs->settings;
3221         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3222                         sw_info->settings);
3223         return 0;
3224 }
3225
3226 int qeth_query_switch_attributes(struct qeth_card *card,
3227                                  struct qeth_switch_info *sw_info)
3228 {
3229         struct qeth_cmd_buffer *iob;
3230
3231         QETH_CARD_TEXT(card, 2, "qswiattr");
3232         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3233                 return -EOPNOTSUPP;
3234         if (!netif_carrier_ok(card->dev))
3235                 return -ENOMEDIUM;
3236         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3237         if (!iob)
3238                 return -ENOMEM;
3239         return qeth_send_ipa_cmd(card, iob,
3240                                 qeth_query_switch_attributes_cb, sw_info);
3241 }
3242
3243 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3244                                           enum qeth_diags_cmds sub_cmd,
3245                                           unsigned int data_length)
3246 {
3247         struct qeth_ipacmd_diagass *cmd;
3248         struct qeth_cmd_buffer *iob;
3249
3250         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3251                                  DIAG_HDR_LEN + data_length);
3252         if (!iob)
3253                 return NULL;
3254
3255         cmd = &__ipa_cmd(iob)->data.diagass;
3256         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3257         cmd->subcmd = sub_cmd;
3258         return iob;
3259 }
3260 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3261
3262 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3263                 struct qeth_reply *reply, unsigned long data)
3264 {
3265         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3266         u16 rc = cmd->hdr.return_code;
3267
3268         if (rc) {
3269                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3270                 return -EIO;
3271         }
3272
3273         card->info.diagass_support = cmd->data.diagass.ext;
3274         return 0;
3275 }
3276
3277 static int qeth_query_setdiagass(struct qeth_card *card)
3278 {
3279         struct qeth_cmd_buffer *iob;
3280
3281         QETH_CARD_TEXT(card, 2, "qdiagass");
3282         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3283         if (!iob)
3284                 return -ENOMEM;
3285         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3286 }
3287
3288 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3289 {
3290         unsigned long info = get_zeroed_page(GFP_KERNEL);
3291         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3292         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3293         struct ccw_dev_id ccwid;
3294         int level;
3295
3296         tid->chpid = card->info.chpid;
3297         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3298         tid->ssid = ccwid.ssid;
3299         tid->devno = ccwid.devno;
3300         if (!info)
3301                 return;
3302         level = stsi(NULL, 0, 0, 0);
3303         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3304                 tid->lparnr = info222->lpar_number;
3305         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3306                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3307                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3308         }
3309         free_page(info);
3310 }
3311
3312 static int qeth_hw_trap_cb(struct qeth_card *card,
3313                 struct qeth_reply *reply, unsigned long data)
3314 {
3315         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3316         u16 rc = cmd->hdr.return_code;
3317
3318         if (rc) {
3319                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3320                 return -EIO;
3321         }
3322         return 0;
3323 }
3324
3325 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3326 {
3327         struct qeth_cmd_buffer *iob;
3328         struct qeth_ipa_cmd *cmd;
3329
3330         QETH_CARD_TEXT(card, 2, "diagtrap");
3331         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3332         if (!iob)
3333                 return -ENOMEM;
3334         cmd = __ipa_cmd(iob);
3335         cmd->data.diagass.type = 1;
3336         cmd->data.diagass.action = action;
3337         switch (action) {
3338         case QETH_DIAGS_TRAP_ARM:
3339                 cmd->data.diagass.options = 0x0003;
3340                 cmd->data.diagass.ext = 0x00010000 +
3341                         sizeof(struct qeth_trap_id);
3342                 qeth_get_trap_id(card,
3343                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3344                 break;
3345         case QETH_DIAGS_TRAP_DISARM:
3346                 cmd->data.diagass.options = 0x0001;
3347                 break;
3348         case QETH_DIAGS_TRAP_CAPTURE:
3349                 break;
3350         }
3351         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3352 }
3353
3354 static int qeth_check_qdio_errors(struct qeth_card *card,
3355                                   struct qdio_buffer *buf,
3356                                   unsigned int qdio_error,
3357                                   const char *dbftext)
3358 {
3359         if (qdio_error) {
3360                 QETH_CARD_TEXT(card, 2, dbftext);
3361                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3362                                buf->element[15].sflags);
3363                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3364                                buf->element[14].sflags);
3365                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3366                 if ((buf->element[15].sflags) == 0x12) {
3367                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3368                         return 0;
3369                 } else
3370                         return 1;
3371         }
3372         return 0;
3373 }
3374
3375 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3376                                          unsigned int count)
3377 {
3378         struct qeth_qdio_q *queue = card->qdio.in_q;
3379         struct list_head *lh;
3380         int i;
3381         int rc;
3382         int newcount = 0;
3383
3384         /* only requeue at a certain threshold to avoid SIGAs */
3385         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3386                 for (i = queue->next_buf_to_init;
3387                      i < queue->next_buf_to_init + count; ++i) {
3388                         if (qeth_init_input_buffer(card,
3389                                 &queue->bufs[QDIO_BUFNR(i)])) {
3390                                 break;
3391                         } else {
3392                                 newcount++;
3393                         }
3394                 }
3395
3396                 if (newcount < count) {
3397                         /* we are in memory shortage so we switch back to
3398                            traditional skb allocation and drop packages */
3399                         atomic_set(&card->force_alloc_skb, 3);
3400                         count = newcount;
3401                 } else {
3402                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3403                 }
3404
3405                 if (!count) {
3406                         i = 0;
3407                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3408                                 i++;
3409                         if (i == card->qdio.in_buf_pool.buf_count) {
3410                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3411                                 schedule_delayed_work(
3412                                         &card->buffer_reclaim_work,
3413                                         QETH_RECLAIM_WORK_TIME);
3414                         }
3415                         return 0;
3416                 }
3417
3418                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3419                              queue->next_buf_to_init, count, NULL);
3420                 if (rc) {
3421                         QETH_CARD_TEXT(card, 2, "qinberr");
3422                 }
3423                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3424                                                      count);
3425                 return count;
3426         }
3427
3428         return 0;
3429 }
3430
3431 static void qeth_buffer_reclaim_work(struct work_struct *work)
3432 {
3433         struct qeth_card *card = container_of(to_delayed_work(work),
3434                                               struct qeth_card,
3435                                               buffer_reclaim_work);
3436
3437         local_bh_disable();
3438         napi_schedule(&card->napi);
3439         /* kick-start the NAPI softirq: */
3440         local_bh_enable();
3441 }
3442
3443 static void qeth_handle_send_error(struct qeth_card *card,
3444                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3445 {
3446         int sbalf15 = buffer->buffer->element[15].sflags;
3447
3448         QETH_CARD_TEXT(card, 6, "hdsnderr");
3449         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3450
3451         if (!qdio_err)
3452                 return;
3453
3454         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3455                 return;
3456
3457         QETH_CARD_TEXT(card, 1, "lnkfail");
3458         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3459                        (u16)qdio_err, (u8)sbalf15);
3460 }
3461
3462 /**
3463  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3464  * @queue: queue to check for packing buffer
3465  *
3466  * Returns number of buffers that were prepared for flush.
3467  */
3468 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3469 {
3470         struct qeth_qdio_out_buffer *buffer;
3471
3472         buffer = queue->bufs[queue->next_buf_to_fill];
3473         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3474             (buffer->next_element_to_fill > 0)) {
3475                 /* it's a packing buffer */
3476                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3477                 queue->next_buf_to_fill =
3478                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3479                 return 1;
3480         }
3481         return 0;
3482 }
3483
3484 /*
3485  * Switched to packing state if the number of used buffers on a queue
3486  * reaches a certain limit.
3487  */
3488 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3489 {
3490         if (!queue->do_pack) {
3491                 if (atomic_read(&queue->used_buffers)
3492                     >= QETH_HIGH_WATERMARK_PACK){
3493                         /* switch non-PACKING -> PACKING */
3494                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3495                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3496                         queue->do_pack = 1;
3497                 }
3498         }
3499 }
3500
3501 /*
3502  * Switches from packing to non-packing mode. If there is a packing
3503  * buffer on the queue this buffer will be prepared to be flushed.
3504  * In that case 1 is returned to inform the caller. If no buffer
3505  * has to be flushed, zero is returned.
3506  */
3507 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3508 {
3509         if (queue->do_pack) {
3510                 if (atomic_read(&queue->used_buffers)
3511                     <= QETH_LOW_WATERMARK_PACK) {
3512                         /* switch PACKING -> non-PACKING */
3513                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3514                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3515                         queue->do_pack = 0;
3516                         return qeth_prep_flush_pack_buffer(queue);
3517                 }
3518         }
3519         return 0;
3520 }
3521
3522 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3523                                int count)
3524 {
3525         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3526         struct qeth_card *card = queue->card;
3527         unsigned int frames, usecs;
3528         struct qaob *aob = NULL;
3529         int rc;
3530         int i;
3531
3532         for (i = index; i < index + count; ++i) {
3533                 unsigned int bidx = QDIO_BUFNR(i);
3534                 struct sk_buff *skb;
3535
3536                 buf = queue->bufs[bidx];
3537                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3538                                 SBAL_EFLAGS_LAST_ENTRY;
3539                 queue->coalesced_frames += buf->frames;
3540
3541                 if (IS_IQD(card)) {
3542                         skb_queue_walk(&buf->skb_list, skb)
3543                                 skb_tx_timestamp(skb);
3544                 }
3545         }
3546
3547         if (IS_IQD(card)) {
3548                 if (card->options.cq == QETH_CQ_ENABLED &&
3549                     !qeth_iqd_is_mcast_queue(card, queue) &&
3550                     count == 1) {
3551                         if (!buf->aob)
3552                                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3553                                                              GFP_ATOMIC);
3554                         if (buf->aob) {
3555                                 struct qeth_qaob_priv1 *priv;
3556
3557                                 aob = buf->aob;
3558                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3559                                 priv->state = QETH_QAOB_ISSUED;
3560                                 priv->queue_no = queue->queue_no;
3561                         }
3562                 }
3563         } else {
3564                 if (!queue->do_pack) {
3565                         if ((atomic_read(&queue->used_buffers) >=
3566                                 (QETH_HIGH_WATERMARK_PACK -
3567                                  QETH_WATERMARK_PACK_FUZZ)) &&
3568                             !atomic_read(&queue->set_pci_flags_count)) {
3569                                 /* it's likely that we'll go to packing
3570                                  * mode soon */
3571                                 atomic_inc(&queue->set_pci_flags_count);
3572                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3573                         }
3574                 } else {
3575                         if (!atomic_read(&queue->set_pci_flags_count)) {
3576                                 /*
3577                                  * there's no outstanding PCI any more, so we
3578                                  * have to request a PCI to be sure the the PCI
3579                                  * will wake at some time in the future then we
3580                                  * can flush packed buffers that might still be
3581                                  * hanging around, which can happen if no
3582                                  * further send was requested by the stack
3583                                  */
3584                                 atomic_inc(&queue->set_pci_flags_count);
3585                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3586                         }
3587                 }
3588         }
3589
3590         QETH_TXQ_STAT_INC(queue, doorbell);
3591         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_OUTPUT, queue->queue_no,
3592                      index, count, aob);
3593
3594         switch (rc) {
3595         case 0:
3596         case -ENOBUFS:
3597                 /* ignore temporary SIGA errors without busy condition */
3598
3599                 /* Fake the TX completion interrupt: */
3600                 frames = READ_ONCE(queue->max_coalesced_frames);
3601                 usecs = READ_ONCE(queue->coalesce_usecs);
3602
3603                 if (frames && queue->coalesced_frames >= frames) {
3604                         napi_schedule(&queue->napi);
3605                         queue->coalesced_frames = 0;
3606                         QETH_TXQ_STAT_INC(queue, coal_frames);
3607                 } else if (qeth_use_tx_irqs(card) &&
3608                            atomic_read(&queue->used_buffers) >= 32) {
3609                         /* Old behaviour carried over from the qdio layer: */
3610                         napi_schedule(&queue->napi);
3611                         QETH_TXQ_STAT_INC(queue, coal_frames);
3612                 } else if (usecs) {
3613                         qeth_tx_arm_timer(queue, usecs);
3614                 }
3615
3616                 break;
3617         default:
3618                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3619                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3620                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3621                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3622                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3623
3624                 /* this must not happen under normal circumstances. if it
3625                  * happens something is really wrong -> recover */
3626                 qeth_schedule_recovery(queue->card);
3627         }
3628 }
3629
3630 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3631 {
3632         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3633
3634         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3635         queue->prev_hdr = NULL;
3636         queue->bulk_count = 0;
3637 }
3638
3639 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3640 {
3641         /*
3642          * check if weed have to switch to non-packing mode or if
3643          * we have to get a pci flag out on the queue
3644          */
3645         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3646             !atomic_read(&queue->set_pci_flags_count)) {
3647                 unsigned int index, flush_cnt;
3648                 bool q_was_packing;
3649
3650                 spin_lock(&queue->lock);
3651
3652                 index = queue->next_buf_to_fill;
3653                 q_was_packing = queue->do_pack;
3654
3655                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3656                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3657                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3658
3659                 if (flush_cnt) {
3660                         qeth_flush_buffers(queue, index, flush_cnt);
3661                         if (q_was_packing)
3662                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3663                 }
3664
3665                 spin_unlock(&queue->lock);
3666         }
3667 }
3668
3669 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3670 {
3671         struct qeth_card *card = (struct qeth_card *)card_ptr;
3672
3673         napi_schedule_irqoff(&card->napi);
3674 }
3675
3676 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3677 {
3678         int rc;
3679
3680         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3681                 rc = -1;
3682                 goto out;
3683         } else {
3684                 if (card->options.cq == cq) {
3685                         rc = 0;
3686                         goto out;
3687                 }
3688
3689                 qeth_free_qdio_queues(card);
3690                 card->options.cq = cq;
3691                 rc = 0;
3692         }
3693 out:
3694         return rc;
3695
3696 }
3697 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3698
3699 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3700 {
3701         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3702         unsigned int queue_no = priv->queue_no;
3703
3704         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3705
3706         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3707             queue_no < card->qdio.no_out_queues)
3708                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3709 }
3710
3711 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3712                                  unsigned int queue, int first_element,
3713                                  int count)
3714 {
3715         struct qeth_qdio_q *cq = card->qdio.c_q;
3716         int i;
3717         int rc;
3718
3719         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3720         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3721         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3722
3723         if (qdio_err) {
3724                 netif_tx_stop_all_queues(card->dev);
3725                 qeth_schedule_recovery(card);
3726                 return;
3727         }
3728
3729         for (i = first_element; i < first_element + count; ++i) {
3730                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3731                 int e = 0;
3732
3733                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3734                        buffer->element[e].addr) {
3735                         unsigned long phys_aob_addr = buffer->element[e].addr;
3736
3737                         qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3738                         ++e;
3739                 }
3740                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3741         }
3742         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3743                      cq->next_buf_to_init, count, NULL);
3744         if (rc) {
3745                 dev_warn(&card->gdev->dev,
3746                         "QDIO reported an error, rc=%i\n", rc);
3747                 QETH_CARD_TEXT(card, 2, "qcqherr");
3748         }
3749
3750         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3751 }
3752
3753 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3754                                     unsigned int qdio_err, int queue,
3755                                     int first_elem, int count,
3756                                     unsigned long card_ptr)
3757 {
3758         struct qeth_card *card = (struct qeth_card *)card_ptr;
3759
3760         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3761         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3762
3763         if (qdio_err)
3764                 qeth_schedule_recovery(card);
3765 }
3766
3767 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3768                                      unsigned int qdio_error, int __queue,
3769                                      int first_element, int count,
3770                                      unsigned long card_ptr)
3771 {
3772         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3773
3774         QETH_CARD_TEXT(card, 2, "achkcond");
3775         netif_tx_stop_all_queues(card->dev);
3776         qeth_schedule_recovery(card);
3777 }
3778
3779 /*
3780  * Note: Function assumes that we have 4 outbound queues.
3781  */
3782 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3783 {
3784         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3785         u8 tos;
3786
3787         switch (card->qdio.do_prio_queueing) {
3788         case QETH_PRIO_Q_ING_TOS:
3789         case QETH_PRIO_Q_ING_PREC:
3790                 switch (vlan_get_protocol(skb)) {
3791                 case htons(ETH_P_IP):
3792                         tos = ipv4_get_dsfield(ip_hdr(skb));
3793                         break;
3794                 case htons(ETH_P_IPV6):
3795                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3796                         break;
3797                 default:
3798                         return card->qdio.default_out_queue;
3799                 }
3800                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3801                         return ~tos >> 6 & 3;
3802                 if (tos & IPTOS_MINCOST)
3803                         return 3;
3804                 if (tos & IPTOS_RELIABILITY)
3805                         return 2;
3806                 if (tos & IPTOS_THROUGHPUT)
3807                         return 1;
3808                 if (tos & IPTOS_LOWDELAY)
3809                         return 0;
3810                 break;
3811         case QETH_PRIO_Q_ING_SKB:
3812                 if (skb->priority > 5)
3813                         return 0;
3814                 return ~skb->priority >> 1 & 3;
3815         case QETH_PRIO_Q_ING_VLAN:
3816                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3817                         return ~ntohs(veth->h_vlan_TCI) >>
3818                                (VLAN_PRIO_SHIFT + 1) & 3;
3819                 break;
3820         case QETH_PRIO_Q_ING_FIXED:
3821                 return card->qdio.default_out_queue;
3822         default:
3823                 break;
3824         }
3825         return card->qdio.default_out_queue;
3826 }
3827 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3828
3829 /**
3830  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3831  * @skb:                                SKB address
3832  *
3833  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3834  * fragmented part of the SKB. Returns zero for linear SKB.
3835  */
3836 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3837 {
3838         int cnt, elements = 0;
3839
3840         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3841                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3842
3843                 elements += qeth_get_elements_for_range(
3844                         (addr_t)skb_frag_address(frag),
3845                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3846         }
3847         return elements;
3848 }
3849
3850 /**
3851  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3852  *                              to transmit an skb.
3853  * @skb:                        the skb to operate on.
3854  * @data_offset:                skip this part of the skb's linear data
3855  *
3856  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3857  * skb's data (both its linear part and paged fragments).
3858  */
3859 static unsigned int qeth_count_elements(struct sk_buff *skb,
3860                                         unsigned int data_offset)
3861 {
3862         unsigned int elements = qeth_get_elements_for_frags(skb);
3863         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3864         addr_t start = (addr_t)skb->data + data_offset;
3865
3866         if (start != end)
3867                 elements += qeth_get_elements_for_range(start, end);
3868         return elements;
3869 }
3870
3871 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3872                                          MAX_TCP_HEADER)
3873
3874 /**
3875  * qeth_add_hw_header() - add a HW header to an skb.
3876  * @queue: TX queue that the skb will be placed on.
3877  * @skb: skb that the HW header should be added to.
3878  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3879  *       it contains a valid pointer to a qeth_hdr.
3880  * @hdr_len: length of the HW header.
3881  * @proto_len: length of protocol headers that need to be in same page as the
3882  *             HW header.
3883  * @elements: returns the required number of buffer elements for this skb.
3884  *
3885  * Returns the pushed length. If the header can't be pushed on
3886  * (eg. because it would cross a page boundary), it is allocated from
3887  * the cache instead and 0 is returned.
3888  * The number of needed buffer elements is returned in @elements.
3889  * Error to create the hdr is indicated by returning with < 0.
3890  */
3891 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3892                               struct sk_buff *skb, struct qeth_hdr **hdr,
3893                               unsigned int hdr_len, unsigned int proto_len,
3894                               unsigned int *elements)
3895 {
3896         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3897         const unsigned int contiguous = proto_len ? proto_len : 1;
3898         const unsigned int max_elements = queue->max_elements;
3899         unsigned int __elements;
3900         addr_t start, end;
3901         bool push_ok;
3902         int rc;
3903
3904 check_layout:
3905         start = (addr_t)skb->data - hdr_len;
3906         end = (addr_t)skb->data;
3907
3908         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3909                 /* Push HW header into same page as first protocol header. */
3910                 push_ok = true;
3911                 /* ... but TSO always needs a separate element for headers: */
3912                 if (skb_is_gso(skb))
3913                         __elements = 1 + qeth_count_elements(skb, proto_len);
3914                 else
3915                         __elements = qeth_count_elements(skb, 0);
3916         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3917                 /* Push HW header into preceding page, flush with skb->data. */
3918                 push_ok = true;
3919                 __elements = 1 + qeth_count_elements(skb, 0);
3920         } else {
3921                 /* Use header cache, copy protocol headers up. */
3922                 push_ok = false;
3923                 __elements = 1 + qeth_count_elements(skb, proto_len);
3924         }
3925
3926         /* Compress skb to fit into one IO buffer: */
3927         if (__elements > max_elements) {
3928                 if (!skb_is_nonlinear(skb)) {
3929                         /* Drop it, no easy way of shrinking it further. */
3930                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3931                                          max_elements, __elements, skb->len);
3932                         return -E2BIG;
3933                 }
3934
3935                 rc = skb_linearize(skb);
3936                 if (rc) {
3937                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3938                         return rc;
3939                 }
3940
3941                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3942                 /* Linearization changed the layout, re-evaluate: */
3943                 goto check_layout;
3944         }
3945
3946         *elements = __elements;
3947         /* Add the header: */
3948         if (push_ok) {
3949                 *hdr = skb_push(skb, hdr_len);
3950                 return hdr_len;
3951         }
3952
3953         /* Fall back to cache element with known-good alignment: */
3954         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3955                 return -E2BIG;
3956         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3957         if (!*hdr)
3958                 return -ENOMEM;
3959         /* Copy protocol headers behind HW header: */
3960         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3961         return 0;
3962 }
3963
3964 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3965                               struct sk_buff *curr_skb,
3966                               struct qeth_hdr *curr_hdr)
3967 {
3968         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3969         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3970
3971         if (!prev_hdr)
3972                 return true;
3973
3974         /* All packets must have the same target: */
3975         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3976                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3977
3978                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3979                                         eth_hdr(curr_skb)->h_dest) &&
3980                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3981         }
3982
3983         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3984                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3985 }
3986
3987 /**
3988  * qeth_fill_buffer() - map skb into an output buffer
3989  * @buf:        buffer to transport the skb
3990  * @skb:        skb to map into the buffer
3991  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3992  *              from qeth_core_header_cache.
3993  * @offset:     when mapping the skb, start at skb->data + offset
3994  * @hd_len:     if > 0, build a dedicated header element of this size
3995  */
3996 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3997                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3998                                      unsigned int offset, unsigned int hd_len)
3999 {
4000         struct qdio_buffer *buffer = buf->buffer;
4001         int element = buf->next_element_to_fill;
4002         int length = skb_headlen(skb) - offset;
4003         char *data = skb->data + offset;
4004         unsigned int elem_length, cnt;
4005         bool is_first_elem = true;
4006
4007         __skb_queue_tail(&buf->skb_list, skb);
4008
4009         /* build dedicated element for HW Header */
4010         if (hd_len) {
4011                 is_first_elem = false;
4012
4013                 buffer->element[element].addr = virt_to_phys(hdr);
4014                 buffer->element[element].length = hd_len;
4015                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4016
4017                 /* HW header is allocated from cache: */
4018                 if ((void *)hdr != skb->data)
4019                         __set_bit(element, buf->from_kmem_cache);
4020                 /* HW header was pushed and is contiguous with linear part: */
4021                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4022                          (data == (char *)hdr + hd_len))
4023                         buffer->element[element].eflags |=
4024                                 SBAL_EFLAGS_CONTIGUOUS;
4025
4026                 element++;
4027         }
4028
4029         /* map linear part into buffer element(s) */
4030         while (length > 0) {
4031                 elem_length = min_t(unsigned int, length,
4032                                     PAGE_SIZE - offset_in_page(data));
4033
4034                 buffer->element[element].addr = virt_to_phys(data);
4035                 buffer->element[element].length = elem_length;
4036                 length -= elem_length;
4037                 if (is_first_elem) {
4038                         is_first_elem = false;
4039                         if (length || skb_is_nonlinear(skb))
4040                                 /* skb needs additional elements */
4041                                 buffer->element[element].eflags =
4042                                         SBAL_EFLAGS_FIRST_FRAG;
4043                         else
4044                                 buffer->element[element].eflags = 0;
4045                 } else {
4046                         buffer->element[element].eflags =
4047                                 SBAL_EFLAGS_MIDDLE_FRAG;
4048                 }
4049
4050                 data += elem_length;
4051                 element++;
4052         }
4053
4054         /* map page frags into buffer element(s) */
4055         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4056                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4057
4058                 data = skb_frag_address(frag);
4059                 length = skb_frag_size(frag);
4060                 while (length > 0) {
4061                         elem_length = min_t(unsigned int, length,
4062                                             PAGE_SIZE - offset_in_page(data));
4063
4064                         buffer->element[element].addr = virt_to_phys(data);
4065                         buffer->element[element].length = elem_length;
4066                         buffer->element[element].eflags =
4067                                 SBAL_EFLAGS_MIDDLE_FRAG;
4068
4069                         length -= elem_length;
4070                         data += elem_length;
4071                         element++;
4072                 }
4073         }
4074
4075         if (buffer->element[element - 1].eflags)
4076                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4077         buf->next_element_to_fill = element;
4078         return element;
4079 }
4080
4081 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4082                        struct sk_buff *skb, unsigned int elements,
4083                        struct qeth_hdr *hdr, unsigned int offset,
4084                        unsigned int hd_len)
4085 {
4086         unsigned int bytes = qdisc_pkt_len(skb);
4087         struct qeth_qdio_out_buffer *buffer;
4088         unsigned int next_element;
4089         struct netdev_queue *txq;
4090         bool stopped = false;
4091         bool flush;
4092
4093         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4094         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4095
4096         /* Just a sanity check, the wake/stop logic should ensure that we always
4097          * get a free buffer.
4098          */
4099         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4100                 return -EBUSY;
4101
4102         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4103
4104         if (flush ||
4105             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4106                 if (buffer->next_element_to_fill > 0) {
4107                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4108                         queue->bulk_count++;
4109                 }
4110
4111                 if (queue->bulk_count >= queue->bulk_max)
4112                         flush = true;
4113
4114                 if (flush)
4115                         qeth_flush_queue(queue);
4116
4117                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4118                                                 queue->bulk_count)];
4119
4120                 /* Sanity-check again: */
4121                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4122                         return -EBUSY;
4123         }
4124
4125         if (buffer->next_element_to_fill == 0 &&
4126             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4127                 /* If a TX completion happens right _here_ and misses to wake
4128                  * the txq, then our re-check below will catch the race.
4129                  */
4130                 QETH_TXQ_STAT_INC(queue, stopped);
4131                 netif_tx_stop_queue(txq);
4132                 stopped = true;
4133         }
4134
4135         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4136         buffer->bytes += bytes;
4137         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4138         queue->prev_hdr = hdr;
4139
4140         flush = __netdev_tx_sent_queue(txq, bytes,
4141                                        !stopped && netdev_xmit_more());
4142
4143         if (flush || next_element >= queue->max_elements) {
4144                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4145                 queue->bulk_count++;
4146
4147                 if (queue->bulk_count >= queue->bulk_max)
4148                         flush = true;
4149
4150                 if (flush)
4151                         qeth_flush_queue(queue);
4152         }
4153
4154         if (stopped && !qeth_out_queue_is_full(queue))
4155                 netif_tx_start_queue(txq);
4156         return 0;
4157 }
4158
4159 static int qeth_do_send_packet(struct qeth_card *card,
4160                                struct qeth_qdio_out_q *queue,
4161                                struct sk_buff *skb, struct qeth_hdr *hdr,
4162                                unsigned int offset, unsigned int hd_len,
4163                                unsigned int elements_needed)
4164 {
4165         unsigned int start_index = queue->next_buf_to_fill;
4166         struct qeth_qdio_out_buffer *buffer;
4167         unsigned int next_element;
4168         struct netdev_queue *txq;
4169         bool stopped = false;
4170         int flush_count = 0;
4171         int do_pack = 0;
4172         int rc = 0;
4173
4174         buffer = queue->bufs[queue->next_buf_to_fill];
4175
4176         /* Just a sanity check, the wake/stop logic should ensure that we always
4177          * get a free buffer.
4178          */
4179         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4180                 return -EBUSY;
4181
4182         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4183
4184         /* check if we need to switch packing state of this queue */
4185         qeth_switch_to_packing_if_needed(queue);
4186         if (queue->do_pack) {
4187                 do_pack = 1;
4188                 /* does packet fit in current buffer? */
4189                 if (buffer->next_element_to_fill + elements_needed >
4190                     queue->max_elements) {
4191                         /* ... no -> set state PRIMED */
4192                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4193                         flush_count++;
4194                         queue->next_buf_to_fill =
4195                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4196                         buffer = queue->bufs[queue->next_buf_to_fill];
4197
4198                         /* We stepped forward, so sanity-check again: */
4199                         if (atomic_read(&buffer->state) !=
4200                             QETH_QDIO_BUF_EMPTY) {
4201                                 qeth_flush_buffers(queue, start_index,
4202                                                            flush_count);
4203                                 rc = -EBUSY;
4204                                 goto out;
4205                         }
4206                 }
4207         }
4208
4209         if (buffer->next_element_to_fill == 0 &&
4210             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4211                 /* If a TX completion happens right _here_ and misses to wake
4212                  * the txq, then our re-check below will catch the race.
4213                  */
4214                 QETH_TXQ_STAT_INC(queue, stopped);
4215                 netif_tx_stop_queue(txq);
4216                 stopped = true;
4217         }
4218
4219         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4220         buffer->bytes += qdisc_pkt_len(skb);
4221         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4222
4223         if (queue->do_pack)
4224                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4225         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4226                 flush_count++;
4227                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4228                 queue->next_buf_to_fill =
4229                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4230         }
4231
4232         if (flush_count)
4233                 qeth_flush_buffers(queue, start_index, flush_count);
4234
4235 out:
4236         if (do_pack)
4237                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4238
4239         if (stopped && !qeth_out_queue_is_full(queue))
4240                 netif_tx_start_queue(txq);
4241         return rc;
4242 }
4243
4244 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4245                               unsigned int payload_len, struct sk_buff *skb,
4246                               unsigned int proto_len)
4247 {
4248         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4249
4250         ext->hdr_tot_len = sizeof(*ext);
4251         ext->imb_hdr_no = 1;
4252         ext->hdr_type = 1;
4253         ext->hdr_version = 1;
4254         ext->hdr_len = 28;
4255         ext->payload_len = payload_len;
4256         ext->mss = skb_shinfo(skb)->gso_size;
4257         ext->dg_hdr_len = proto_len;
4258 }
4259
4260 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4261               struct qeth_qdio_out_q *queue, __be16 proto,
4262               void (*fill_header)(struct qeth_qdio_out_q *queue,
4263                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4264                                   __be16 proto, unsigned int data_len))
4265 {
4266         unsigned int proto_len, hw_hdr_len;
4267         unsigned int frame_len = skb->len;
4268         bool is_tso = skb_is_gso(skb);
4269         unsigned int data_offset = 0;
4270         struct qeth_hdr *hdr = NULL;
4271         unsigned int hd_len = 0;
4272         unsigned int elements;
4273         int push_len, rc;
4274
4275         if (is_tso) {
4276                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4277                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4278         } else {
4279                 hw_hdr_len = sizeof(struct qeth_hdr);
4280                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4281         }
4282
4283         rc = skb_cow_head(skb, hw_hdr_len);
4284         if (rc)
4285                 return rc;
4286
4287         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4288                                       &elements);
4289         if (push_len < 0)
4290                 return push_len;
4291         if (is_tso || !push_len) {
4292                 /* HW header needs its own buffer element. */
4293                 hd_len = hw_hdr_len + proto_len;
4294                 data_offset = push_len + proto_len;
4295         }
4296         memset(hdr, 0, hw_hdr_len);
4297         fill_header(queue, hdr, skb, proto, frame_len);
4298         if (is_tso)
4299                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4300                                   frame_len - proto_len, skb, proto_len);
4301
4302         if (IS_IQD(card)) {
4303                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4304                                  hd_len);
4305         } else {
4306                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4307                 skb_orphan(skb);
4308                 spin_lock(&queue->lock);
4309                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4310                                          hd_len, elements);
4311                 spin_unlock(&queue->lock);
4312         }
4313
4314         if (rc && !push_len)
4315                 kmem_cache_free(qeth_core_header_cache, hdr);
4316
4317         return rc;
4318 }
4319 EXPORT_SYMBOL_GPL(qeth_xmit);
4320
4321 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4322                 struct qeth_reply *reply, unsigned long data)
4323 {
4324         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4325         struct qeth_ipacmd_setadpparms *setparms;
4326
4327         QETH_CARD_TEXT(card, 4, "prmadpcb");
4328
4329         setparms = &(cmd->data.setadapterparms);
4330         if (qeth_setadpparms_inspect_rc(cmd)) {
4331                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4332                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4333         }
4334         card->info.promisc_mode = setparms->data.mode;
4335         return (cmd->hdr.return_code) ? -EIO : 0;
4336 }
4337
4338 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4339 {
4340         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4341                                                     SET_PROMISC_MODE_OFF;
4342         struct qeth_cmd_buffer *iob;
4343         struct qeth_ipa_cmd *cmd;
4344
4345         QETH_CARD_TEXT(card, 4, "setprom");
4346         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4347
4348         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4349                                    SETADP_DATA_SIZEOF(mode));
4350         if (!iob)
4351                 return;
4352         cmd = __ipa_cmd(iob);
4353         cmd->data.setadapterparms.data.mode = mode;
4354         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4355 }
4356 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4357
4358 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4359                 struct qeth_reply *reply, unsigned long data)
4360 {
4361         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4362         struct qeth_ipacmd_setadpparms *adp_cmd;
4363
4364         QETH_CARD_TEXT(card, 4, "chgmaccb");
4365         if (qeth_setadpparms_inspect_rc(cmd))
4366                 return -EIO;
4367
4368         adp_cmd = &cmd->data.setadapterparms;
4369         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4370                 return -EADDRNOTAVAIL;
4371
4372         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4373             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4374                 return -EADDRNOTAVAIL;
4375
4376         eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4377         return 0;
4378 }
4379
4380 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4381 {
4382         int rc;
4383         struct qeth_cmd_buffer *iob;
4384         struct qeth_ipa_cmd *cmd;
4385
4386         QETH_CARD_TEXT(card, 4, "chgmac");
4387
4388         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4389                                    SETADP_DATA_SIZEOF(change_addr));
4390         if (!iob)
4391                 return -ENOMEM;
4392         cmd = __ipa_cmd(iob);
4393         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4394         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4395         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4396                         card->dev->dev_addr);
4397         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4398                                NULL);
4399         return rc;
4400 }
4401 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4402
4403 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4404                 struct qeth_reply *reply, unsigned long data)
4405 {
4406         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4407         struct qeth_set_access_ctrl *access_ctrl_req;
4408
4409         QETH_CARD_TEXT(card, 4, "setaccb");
4410
4411         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4412         QETH_CARD_TEXT_(card, 2, "rc=%d",
4413                         cmd->data.setadapterparms.hdr.return_code);
4414         if (cmd->data.setadapterparms.hdr.return_code !=
4415                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4416                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4417                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4418                                  cmd->data.setadapterparms.hdr.return_code);
4419         switch (qeth_setadpparms_inspect_rc(cmd)) {
4420         case SET_ACCESS_CTRL_RC_SUCCESS:
4421                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4422                         dev_info(&card->gdev->dev,
4423                             "QDIO data connection isolation is deactivated\n");
4424                 else
4425                         dev_info(&card->gdev->dev,
4426                             "QDIO data connection isolation is activated\n");
4427                 return 0;
4428         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4429                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4430                                  CARD_DEVID(card));
4431                 return 0;
4432         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4433                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4434                                  CARD_DEVID(card));
4435                 return 0;
4436         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4437                 dev_err(&card->gdev->dev, "Adapter does not "
4438                         "support QDIO data connection isolation\n");
4439                 return -EOPNOTSUPP;
4440         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4441                 dev_err(&card->gdev->dev,
4442                         "Adapter is dedicated. "
4443                         "QDIO data connection isolation not supported\n");
4444                 return -EOPNOTSUPP;
4445         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4446                 dev_err(&card->gdev->dev,
4447                         "TSO does not permit QDIO data connection isolation\n");
4448                 return -EPERM;
4449         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4450                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4451                         "support reflective relay mode\n");
4452                 return -EOPNOTSUPP;
4453         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4454                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4455                                         "enabled at the adjacent switch port");
4456                 return -EREMOTEIO;
4457         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4458                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4459                                         "at the adjacent switch failed\n");
4460                 /* benign error while disabling ISOLATION_MODE_FWD */
4461                 return 0;
4462         default:
4463                 return -EIO;
4464         }
4465 }
4466
4467 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4468                                      enum qeth_ipa_isolation_modes mode)
4469 {
4470         int rc;
4471         struct qeth_cmd_buffer *iob;
4472         struct qeth_ipa_cmd *cmd;
4473         struct qeth_set_access_ctrl *access_ctrl_req;
4474
4475         QETH_CARD_TEXT(card, 4, "setacctl");
4476
4477         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4478                 dev_err(&card->gdev->dev,
4479                         "Adapter does not support QDIO data connection isolation\n");
4480                 return -EOPNOTSUPP;
4481         }
4482
4483         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4484                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4485         if (!iob)
4486                 return -ENOMEM;
4487         cmd = __ipa_cmd(iob);
4488         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4489         access_ctrl_req->subcmd_code = mode;
4490
4491         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4492                                NULL);
4493         if (rc) {
4494                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4495                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4496                                  rc, CARD_DEVID(card));
4497         }
4498
4499         return rc;
4500 }
4501
4502 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4503 {
4504         struct qeth_card *card;
4505
4506         card = dev->ml_priv;
4507         QETH_CARD_TEXT(card, 4, "txtimeo");
4508         qeth_schedule_recovery(card);
4509 }
4510 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4511
4512 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4513 {
4514         struct qeth_card *card = dev->ml_priv;
4515         int rc = 0;
4516
4517         switch (regnum) {
4518         case MII_BMCR: /* Basic mode control register */
4519                 rc = BMCR_FULLDPLX;
4520                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4521                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4522                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4523                         rc |= BMCR_SPEED100;
4524                 break;
4525         case MII_BMSR: /* Basic mode status register */
4526                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4527                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4528                      BMSR_100BASE4;
4529                 break;
4530         case MII_PHYSID1: /* PHYS ID 1 */
4531                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4532                      dev->dev_addr[2];
4533                 rc = (rc >> 5) & 0xFFFF;
4534                 break;
4535         case MII_PHYSID2: /* PHYS ID 2 */
4536                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4537                 break;
4538         case MII_ADVERTISE: /* Advertisement control reg */
4539                 rc = ADVERTISE_ALL;
4540                 break;
4541         case MII_LPA: /* Link partner ability reg */
4542                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4543                      LPA_100BASE4 | LPA_LPACK;
4544                 break;
4545         case MII_EXPANSION: /* Expansion register */
4546                 break;
4547         case MII_DCOUNTER: /* disconnect counter */
4548                 break;
4549         case MII_FCSCOUNTER: /* false carrier counter */
4550                 break;
4551         case MII_NWAYTEST: /* N-way auto-neg test register */
4552                 break;
4553         case MII_RERRCOUNTER: /* rx error counter */
4554                 rc = card->stats.rx_length_errors +
4555                      card->stats.rx_frame_errors +
4556                      card->stats.rx_fifo_errors;
4557                 break;
4558         case MII_SREVISION: /* silicon revision */
4559                 break;
4560         case MII_RESV1: /* reserved 1 */
4561                 break;
4562         case MII_LBRERROR: /* loopback, rx, bypass error */
4563                 break;
4564         case MII_PHYADDR: /* physical address */
4565                 break;
4566         case MII_RESV2: /* reserved 2 */
4567                 break;
4568         case MII_TPISTATUS: /* TPI status for 10mbps */
4569                 break;
4570         case MII_NCONFIG: /* network interface config */
4571                 break;
4572         default:
4573                 break;
4574         }
4575         return rc;
4576 }
4577
4578 static int qeth_snmp_command_cb(struct qeth_card *card,
4579                                 struct qeth_reply *reply, unsigned long data)
4580 {
4581         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4582         struct qeth_arp_query_info *qinfo = reply->param;
4583         struct qeth_ipacmd_setadpparms *adp_cmd;
4584         unsigned int data_len;
4585         void *snmp_data;
4586
4587         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4588
4589         if (cmd->hdr.return_code) {
4590                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4591                 return -EIO;
4592         }
4593         if (cmd->data.setadapterparms.hdr.return_code) {
4594                 cmd->hdr.return_code =
4595                         cmd->data.setadapterparms.hdr.return_code;
4596                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4597                 return -EIO;
4598         }
4599
4600         adp_cmd = &cmd->data.setadapterparms;
4601         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4602         if (adp_cmd->hdr.seq_no == 1) {
4603                 snmp_data = &adp_cmd->data.snmp;
4604         } else {
4605                 snmp_data = &adp_cmd->data.snmp.request;
4606                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4607         }
4608
4609         /* check if there is enough room in userspace */
4610         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4611                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4612                 return -ENOSPC;
4613         }
4614         QETH_CARD_TEXT_(card, 4, "snore%i",
4615                         cmd->data.setadapterparms.hdr.used_total);
4616         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4617                         cmd->data.setadapterparms.hdr.seq_no);
4618         /*copy entries to user buffer*/
4619         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4620         qinfo->udata_offset += data_len;
4621
4622         if (cmd->data.setadapterparms.hdr.seq_no <
4623             cmd->data.setadapterparms.hdr.used_total)
4624                 return 1;
4625         return 0;
4626 }
4627
4628 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4629 {
4630         struct qeth_snmp_ureq __user *ureq;
4631         struct qeth_cmd_buffer *iob;
4632         unsigned int req_len;
4633         struct qeth_arp_query_info qinfo = {0, };
4634         int rc = 0;
4635
4636         QETH_CARD_TEXT(card, 3, "snmpcmd");
4637
4638         if (IS_VM_NIC(card))
4639                 return -EOPNOTSUPP;
4640
4641         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4642             IS_LAYER3(card))
4643                 return -EOPNOTSUPP;
4644
4645         ureq = (struct qeth_snmp_ureq __user *) udata;
4646         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4647             get_user(req_len, &ureq->hdr.req_len))
4648                 return -EFAULT;
4649
4650         /* Sanitize user input, to avoid overflows in iob size calculation: */
4651         if (req_len > QETH_BUFSIZE)
4652                 return -EINVAL;
4653
4654         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4655         if (!iob)
4656                 return -ENOMEM;
4657
4658         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4659                            &ureq->cmd, req_len)) {
4660                 qeth_put_cmd(iob);
4661                 return -EFAULT;
4662         }
4663
4664         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4665         if (!qinfo.udata) {
4666                 qeth_put_cmd(iob);
4667                 return -ENOMEM;
4668         }
4669         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4670
4671         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4672         if (rc)
4673                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4674                                  CARD_DEVID(card), rc);
4675         else {
4676                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4677                         rc = -EFAULT;
4678         }
4679
4680         kfree(qinfo.udata);
4681         return rc;
4682 }
4683
4684 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4685                                          struct qeth_reply *reply,
4686                                          unsigned long data)
4687 {
4688         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4689         struct qeth_qoat_priv *priv = reply->param;
4690         int resdatalen;
4691
4692         QETH_CARD_TEXT(card, 3, "qoatcb");
4693         if (qeth_setadpparms_inspect_rc(cmd))
4694                 return -EIO;
4695
4696         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4697
4698         if (resdatalen > (priv->buffer_len - priv->response_len))
4699                 return -ENOSPC;
4700
4701         memcpy(priv->buffer + priv->response_len,
4702                &cmd->data.setadapterparms.hdr, resdatalen);
4703         priv->response_len += resdatalen;
4704
4705         if (cmd->data.setadapterparms.hdr.seq_no <
4706             cmd->data.setadapterparms.hdr.used_total)
4707                 return 1;
4708         return 0;
4709 }
4710
4711 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4712 {
4713         int rc = 0;
4714         struct qeth_cmd_buffer *iob;
4715         struct qeth_ipa_cmd *cmd;
4716         struct qeth_query_oat *oat_req;
4717         struct qeth_query_oat_data oat_data;
4718         struct qeth_qoat_priv priv;
4719         void __user *tmp;
4720
4721         QETH_CARD_TEXT(card, 3, "qoatcmd");
4722
4723         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4724                 return -EOPNOTSUPP;
4725
4726         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4727                 return -EFAULT;
4728
4729         priv.buffer_len = oat_data.buffer_len;
4730         priv.response_len = 0;
4731         priv.buffer = vzalloc(oat_data.buffer_len);
4732         if (!priv.buffer)
4733                 return -ENOMEM;
4734
4735         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4736                                    SETADP_DATA_SIZEOF(query_oat));
4737         if (!iob) {
4738                 rc = -ENOMEM;
4739                 goto out_free;
4740         }
4741         cmd = __ipa_cmd(iob);
4742         oat_req = &cmd->data.setadapterparms.data.query_oat;
4743         oat_req->subcmd_code = oat_data.command;
4744
4745         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4746         if (!rc) {
4747                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4748                                          u64_to_user_ptr(oat_data.ptr);
4749                 oat_data.response_len = priv.response_len;
4750
4751                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4752                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4753                         rc = -EFAULT;
4754         }
4755
4756 out_free:
4757         vfree(priv.buffer);
4758         return rc;
4759 }
4760
4761 static int qeth_query_card_info_cb(struct qeth_card *card,
4762                                    struct qeth_reply *reply, unsigned long data)
4763 {
4764         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4765         struct qeth_link_info *link_info = reply->param;
4766         struct qeth_query_card_info *card_info;
4767
4768         QETH_CARD_TEXT(card, 2, "qcrdincb");
4769         if (qeth_setadpparms_inspect_rc(cmd))
4770                 return -EIO;
4771
4772         card_info = &cmd->data.setadapterparms.data.card_info;
4773         netdev_dbg(card->dev,
4774                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4775                    card_info->card_type, card_info->port_mode,
4776                    card_info->port_speed);
4777
4778         switch (card_info->port_mode) {
4779         case CARD_INFO_PORTM_FULLDUPLEX:
4780                 link_info->duplex = DUPLEX_FULL;
4781                 break;
4782         case CARD_INFO_PORTM_HALFDUPLEX:
4783                 link_info->duplex = DUPLEX_HALF;
4784                 break;
4785         default:
4786                 link_info->duplex = DUPLEX_UNKNOWN;
4787         }
4788
4789         switch (card_info->card_type) {
4790         case CARD_INFO_TYPE_1G_COPPER_A:
4791         case CARD_INFO_TYPE_1G_COPPER_B:
4792                 link_info->speed = SPEED_1000;
4793                 link_info->port = PORT_TP;
4794                 break;
4795         case CARD_INFO_TYPE_1G_FIBRE_A:
4796         case CARD_INFO_TYPE_1G_FIBRE_B:
4797                 link_info->speed = SPEED_1000;
4798                 link_info->port = PORT_FIBRE;
4799                 break;
4800         case CARD_INFO_TYPE_10G_FIBRE_A:
4801         case CARD_INFO_TYPE_10G_FIBRE_B:
4802                 link_info->speed = SPEED_10000;
4803                 link_info->port = PORT_FIBRE;
4804                 break;
4805         default:
4806                 switch (card_info->port_speed) {
4807                 case CARD_INFO_PORTS_10M:
4808                         link_info->speed = SPEED_10;
4809                         break;
4810                 case CARD_INFO_PORTS_100M:
4811                         link_info->speed = SPEED_100;
4812                         break;
4813                 case CARD_INFO_PORTS_1G:
4814                         link_info->speed = SPEED_1000;
4815                         break;
4816                 case CARD_INFO_PORTS_10G:
4817                         link_info->speed = SPEED_10000;
4818                         break;
4819                 case CARD_INFO_PORTS_25G:
4820                         link_info->speed = SPEED_25000;
4821                         break;
4822                 default:
4823                         link_info->speed = SPEED_UNKNOWN;
4824                 }
4825
4826                 link_info->port = PORT_OTHER;
4827         }
4828
4829         return 0;
4830 }
4831
4832 int qeth_query_card_info(struct qeth_card *card,
4833                          struct qeth_link_info *link_info)
4834 {
4835         struct qeth_cmd_buffer *iob;
4836
4837         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4838         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4839                 return -EOPNOTSUPP;
4840         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4841         if (!iob)
4842                 return -ENOMEM;
4843
4844         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4845 }
4846
4847 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4848                                       struct qeth_reply *reply_priv,
4849                                       unsigned long data)
4850 {
4851         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4852         struct qeth_link_info *link_info = reply_priv->param;
4853         struct qeth_query_oat_physical_if *phys_if;
4854         struct qeth_query_oat_reply *reply;
4855
4856         if (qeth_setadpparms_inspect_rc(cmd))
4857                 return -EIO;
4858
4859         /* Multi-part reply is unexpected, don't bother: */
4860         if (cmd->data.setadapterparms.hdr.used_total > 1)
4861                 return -EINVAL;
4862
4863         /* Expect the reply to start with phys_if data: */
4864         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4865         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4866             reply->length < sizeof(*reply))
4867                 return -EINVAL;
4868
4869         phys_if = &reply->phys_if;
4870
4871         switch (phys_if->speed_duplex) {
4872         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4873                 link_info->speed = SPEED_10;
4874                 link_info->duplex = DUPLEX_HALF;
4875                 break;
4876         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4877                 link_info->speed = SPEED_10;
4878                 link_info->duplex = DUPLEX_FULL;
4879                 break;
4880         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4881                 link_info->speed = SPEED_100;
4882                 link_info->duplex = DUPLEX_HALF;
4883                 break;
4884         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4885                 link_info->speed = SPEED_100;
4886                 link_info->duplex = DUPLEX_FULL;
4887                 break;
4888         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4889                 link_info->speed = SPEED_1000;
4890                 link_info->duplex = DUPLEX_HALF;
4891                 break;
4892         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4893                 link_info->speed = SPEED_1000;
4894                 link_info->duplex = DUPLEX_FULL;
4895                 break;
4896         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4897                 link_info->speed = SPEED_10000;
4898                 link_info->duplex = DUPLEX_FULL;
4899                 break;
4900         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4901                 link_info->speed = SPEED_25000;
4902                 link_info->duplex = DUPLEX_FULL;
4903                 break;
4904         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4905         default:
4906                 link_info->speed = SPEED_UNKNOWN;
4907                 link_info->duplex = DUPLEX_UNKNOWN;
4908                 break;
4909         }
4910
4911         switch (phys_if->media_type) {
4912         case QETH_QOAT_PHYS_MEDIA_COPPER:
4913                 link_info->port = PORT_TP;
4914                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4915                 break;
4916         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4917                 link_info->port = PORT_FIBRE;
4918                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4919                 break;
4920         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4921                 link_info->port = PORT_FIBRE;
4922                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4923                 break;
4924         default:
4925                 link_info->port = PORT_OTHER;
4926                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4927                 break;
4928         }
4929
4930         return 0;
4931 }
4932
4933 static void qeth_init_link_info(struct qeth_card *card)
4934 {
4935         card->info.link_info.duplex = DUPLEX_FULL;
4936
4937         if (IS_IQD(card) || IS_VM_NIC(card)) {
4938                 card->info.link_info.speed = SPEED_10000;
4939                 card->info.link_info.port = PORT_FIBRE;
4940                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4941         } else {
4942                 switch (card->info.link_type) {
4943                 case QETH_LINK_TYPE_FAST_ETH:
4944                 case QETH_LINK_TYPE_LANE_ETH100:
4945                         card->info.link_info.speed = SPEED_100;
4946                         card->info.link_info.port = PORT_TP;
4947                         break;
4948                 case QETH_LINK_TYPE_GBIT_ETH:
4949                 case QETH_LINK_TYPE_LANE_ETH1000:
4950                         card->info.link_info.speed = SPEED_1000;
4951                         card->info.link_info.port = PORT_FIBRE;
4952                         break;
4953                 case QETH_LINK_TYPE_10GBIT_ETH:
4954                         card->info.link_info.speed = SPEED_10000;
4955                         card->info.link_info.port = PORT_FIBRE;
4956                         break;
4957                 case QETH_LINK_TYPE_25GBIT_ETH:
4958                         card->info.link_info.speed = SPEED_25000;
4959                         card->info.link_info.port = PORT_FIBRE;
4960                         break;
4961                 default:
4962                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
4963                                  card->info.link_type);
4964                         card->info.link_info.speed = SPEED_UNKNOWN;
4965                         card->info.link_info.port = PORT_OTHER;
4966                 }
4967
4968                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
4969         }
4970
4971         /* Get more accurate data via QUERY OAT: */
4972         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4973                 struct qeth_link_info link_info;
4974                 struct qeth_cmd_buffer *iob;
4975
4976                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4977                                            SETADP_DATA_SIZEOF(query_oat));
4978                 if (iob) {
4979                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4980                         struct qeth_query_oat *oat_req;
4981
4982                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4983                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4984
4985                         if (!qeth_send_ipa_cmd(card, iob,
4986                                                qeth_init_link_info_oat_cb,
4987                                                &link_info)) {
4988                                 if (link_info.speed != SPEED_UNKNOWN)
4989                                         card->info.link_info.speed = link_info.speed;
4990                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4991                                         card->info.link_info.duplex = link_info.duplex;
4992                                 if (link_info.port != PORT_OTHER)
4993                                         card->info.link_info.port = link_info.port;
4994                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4995                                         card->info.link_info.link_mode = link_info.link_mode;
4996                         }
4997                 }
4998         }
4999 }
5000
5001 /**
5002  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5003  * @card: pointer to a qeth_card
5004  *
5005  * Returns
5006  *      0, if a MAC address has been set for the card's netdevice
5007  *      a return code, for various error conditions
5008  */
5009 int qeth_vm_request_mac(struct qeth_card *card)
5010 {
5011         struct diag26c_mac_resp *response;
5012         struct diag26c_mac_req *request;
5013         int rc;
5014
5015         QETH_CARD_TEXT(card, 2, "vmreqmac");
5016
5017         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5018         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5019         if (!request || !response) {
5020                 rc = -ENOMEM;
5021                 goto out;
5022         }
5023
5024         request->resp_buf_len = sizeof(*response);
5025         request->resp_version = DIAG26C_VERSION2;
5026         request->op_code = DIAG26C_GET_MAC;
5027         request->devno = card->info.ddev_devno;
5028
5029         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5030         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5031         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5032         if (rc)
5033                 goto out;
5034         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5035
5036         if (request->resp_buf_len < sizeof(*response) ||
5037             response->version != request->resp_version) {
5038                 rc = -EIO;
5039                 QETH_CARD_TEXT(card, 2, "badresp");
5040                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5041                               sizeof(request->resp_buf_len));
5042         } else if (!is_valid_ether_addr(response->mac)) {
5043                 rc = -EINVAL;
5044                 QETH_CARD_TEXT(card, 2, "badmac");
5045                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5046         } else {
5047                 eth_hw_addr_set(card->dev, response->mac);
5048         }
5049
5050 out:
5051         kfree(response);
5052         kfree(request);
5053         return rc;
5054 }
5055 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5056
5057 static void qeth_determine_capabilities(struct qeth_card *card)
5058 {
5059         struct qeth_channel *channel = &card->data;
5060         struct ccw_device *ddev = channel->ccwdev;
5061         int rc;
5062         int ddev_offline = 0;
5063
5064         QETH_CARD_TEXT(card, 2, "detcapab");
5065         if (!ddev->online) {
5066                 ddev_offline = 1;
5067                 rc = qeth_start_channel(channel);
5068                 if (rc) {
5069                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5070                         goto out;
5071                 }
5072         }
5073
5074         rc = qeth_read_conf_data(card);
5075         if (rc) {
5076                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5077                                  CARD_DEVID(card), rc);
5078                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5079                 goto out_offline;
5080         }
5081
5082         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5083         if (rc)
5084                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5085
5086         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5087         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5088         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5089         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5090         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5091         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5092             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5093             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5094                 dev_info(&card->gdev->dev,
5095                         "Completion Queueing supported\n");
5096         } else {
5097                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5098         }
5099
5100 out_offline:
5101         if (ddev_offline == 1)
5102                 qeth_stop_channel(channel);
5103 out:
5104         return;
5105 }
5106
5107 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5108 {
5109         struct qeth_card_info *info = &card->info;
5110         struct ccw_device *cdev = CARD_DDEV(card);
5111         struct ccw_dev_id dev_id;
5112
5113         QETH_CARD_TEXT(card, 2, "ccwconfd");
5114         ccw_device_get_id(cdev, &dev_id);
5115
5116         info->ddev_devno = dev_id.devno;
5117         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5118                           !ccw_device_get_iid(cdev, &info->iid) &&
5119                           !ccw_device_get_chid(cdev, 0, &info->chid);
5120         info->ssid = dev_id.ssid;
5121
5122         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5123                  info->chid, info->chpid);
5124
5125         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5126         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5127         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5128         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5129         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5130         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5131         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5132 }
5133
5134 static int qeth_qdio_establish(struct qeth_card *card)
5135 {
5136         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5137         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5138         struct qeth_qib_parms *qib_parms = NULL;
5139         struct qdio_initialize init_data;
5140         unsigned int no_input_qs = 1;
5141         unsigned int i;
5142         int rc = 0;
5143
5144         QETH_CARD_TEXT(card, 2, "qdioest");
5145
5146         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5147                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5148                 if (!qib_parms)
5149                         return -ENOMEM;
5150
5151                 qeth_fill_qib_parms(card, qib_parms);
5152         }
5153
5154         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5155         if (card->options.cq == QETH_CQ_ENABLED) {
5156                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5157                 no_input_qs++;
5158         }
5159
5160         for (i = 0; i < card->qdio.no_out_queues; i++)
5161                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5162
5163         memset(&init_data, 0, sizeof(struct qdio_initialize));
5164         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5165                                                           QDIO_QETH_QFMT;
5166         init_data.qib_param_field_format = 0;
5167         init_data.qib_param_field        = (void *)qib_parms;
5168         init_data.no_input_qs            = no_input_qs;
5169         init_data.no_output_qs           = card->qdio.no_out_queues;
5170         init_data.input_handler          = qeth_qdio_input_handler;
5171         init_data.output_handler         = qeth_qdio_output_handler;
5172         init_data.irq_poll               = qeth_qdio_poll;
5173         init_data.int_parm               = (unsigned long) card;
5174         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5175         init_data.output_sbal_addr_array = out_sbal_ptrs;
5176
5177         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5178                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5179                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5180                                    init_data.no_output_qs);
5181                 if (rc) {
5182                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5183                         goto out;
5184                 }
5185                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5186                 if (rc) {
5187                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5188                         qdio_free(CARD_DDEV(card));
5189                 }
5190         }
5191
5192         switch (card->options.cq) {
5193         case QETH_CQ_ENABLED:
5194                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5195                 break;
5196         case QETH_CQ_DISABLED:
5197                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5198                 break;
5199         default:
5200                 break;
5201         }
5202
5203 out:
5204         kfree(qib_parms);
5205         return rc;
5206 }
5207
5208 static void qeth_core_free_card(struct qeth_card *card)
5209 {
5210         QETH_CARD_TEXT(card, 2, "freecrd");
5211
5212         unregister_service_level(&card->qeth_service_level);
5213         debugfs_remove_recursive(card->debugfs);
5214         qeth_put_cmd(card->read_cmd);
5215         destroy_workqueue(card->event_wq);
5216         dev_set_drvdata(&card->gdev->dev, NULL);
5217         kfree(card);
5218 }
5219
5220 static void qeth_trace_features(struct qeth_card *card)
5221 {
5222         QETH_CARD_TEXT(card, 2, "features");
5223         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5224         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5225         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5226         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5227                       sizeof(card->info.diagass_support));
5228 }
5229
5230 static struct ccw_device_id qeth_ids[] = {
5231         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5232                                         .driver_info = QETH_CARD_TYPE_OSD},
5233         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5234                                         .driver_info = QETH_CARD_TYPE_IQD},
5235         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5236                                         .driver_info = QETH_CARD_TYPE_OSM},
5237 #ifdef CONFIG_QETH_OSX
5238         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5239                                         .driver_info = QETH_CARD_TYPE_OSX},
5240 #endif
5241         {},
5242 };
5243 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5244
5245 static struct ccw_driver qeth_ccw_driver = {
5246         .driver = {
5247                 .owner = THIS_MODULE,
5248                 .name = "qeth",
5249         },
5250         .ids = qeth_ids,
5251         .probe = ccwgroup_probe_ccwdev,
5252         .remove = ccwgroup_remove_ccwdev,
5253 };
5254
5255 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5256 {
5257         int retries = 3;
5258         int rc;
5259
5260         QETH_CARD_TEXT(card, 2, "hrdsetup");
5261         atomic_set(&card->force_alloc_skb, 0);
5262         rc = qeth_update_from_chp_desc(card);
5263         if (rc)
5264                 return rc;
5265 retry:
5266         if (retries < 3)
5267                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5268                                  CARD_DEVID(card));
5269         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5270         qeth_stop_channel(&card->data);
5271         qeth_stop_channel(&card->write);
5272         qeth_stop_channel(&card->read);
5273         qdio_free(CARD_DDEV(card));
5274
5275         rc = qeth_start_channel(&card->read);
5276         if (rc)
5277                 goto retriable;
5278         rc = qeth_start_channel(&card->write);
5279         if (rc)
5280                 goto retriable;
5281         rc = qeth_start_channel(&card->data);
5282         if (rc)
5283                 goto retriable;
5284 retriable:
5285         if (rc == -ERESTARTSYS) {
5286                 QETH_CARD_TEXT(card, 2, "break1");
5287                 return rc;
5288         } else if (rc) {
5289                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5290                 if (--retries < 0)
5291                         goto out;
5292                 else
5293                         goto retry;
5294         }
5295
5296         qeth_determine_capabilities(card);
5297         qeth_read_ccw_conf_data(card);
5298         qeth_idx_init(card);
5299
5300         rc = qeth_idx_activate_read_channel(card);
5301         if (rc == -EINTR) {
5302                 QETH_CARD_TEXT(card, 2, "break2");
5303                 return rc;
5304         } else if (rc) {
5305                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5306                 if (--retries < 0)
5307                         goto out;
5308                 else
5309                         goto retry;
5310         }
5311
5312         rc = qeth_idx_activate_write_channel(card);
5313         if (rc == -EINTR) {
5314                 QETH_CARD_TEXT(card, 2, "break3");
5315                 return rc;
5316         } else if (rc) {
5317                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5318                 if (--retries < 0)
5319                         goto out;
5320                 else
5321                         goto retry;
5322         }
5323         card->read_or_write_problem = 0;
5324         rc = qeth_mpc_initialize(card);
5325         if (rc) {
5326                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5327                 goto out;
5328         }
5329
5330         rc = qeth_send_startlan(card);
5331         if (rc) {
5332                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5333                 if (rc == -ENETDOWN) {
5334                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5335                         *carrier_ok = false;
5336                 } else {
5337                         goto out;
5338                 }
5339         } else {
5340                 *carrier_ok = true;
5341         }
5342
5343         card->options.ipa4.supported = 0;
5344         card->options.ipa6.supported = 0;
5345         card->options.adp.supported = 0;
5346         card->options.sbp.supported_funcs = 0;
5347         card->info.diagass_support = 0;
5348         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5349         if (rc == -ENOMEM)
5350                 goto out;
5351         if (qeth_is_supported(card, IPA_IPV6)) {
5352                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5353                 if (rc == -ENOMEM)
5354                         goto out;
5355         }
5356         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5357                 rc = qeth_query_setadapterparms(card);
5358                 if (rc < 0) {
5359                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5360                         goto out;
5361                 }
5362         }
5363         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5364                 rc = qeth_query_setdiagass(card);
5365                 if (rc)
5366                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5367         }
5368
5369         qeth_trace_features(card);
5370
5371         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5372             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5373                 card->info.hwtrap = 0;
5374
5375         if (card->options.isolation != ISOLATION_MODE_NONE) {
5376                 rc = qeth_setadpparms_set_access_ctrl(card,
5377                                                       card->options.isolation);
5378                 if (rc)
5379                         goto out;
5380         }
5381
5382         qeth_init_link_info(card);
5383
5384         rc = qeth_init_qdio_queues(card);
5385         if (rc) {
5386                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5387                 goto out;
5388         }
5389
5390         return 0;
5391 out:
5392         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5393                 "an error on the device\n");
5394         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5395                          CARD_DEVID(card), rc);
5396         return rc;
5397 }
5398
5399 static int qeth_set_online(struct qeth_card *card,
5400                            const struct qeth_discipline *disc)
5401 {
5402         bool carrier_ok;
5403         int rc;
5404
5405         mutex_lock(&card->conf_mutex);
5406         QETH_CARD_TEXT(card, 2, "setonlin");
5407
5408         rc = qeth_hardsetup_card(card, &carrier_ok);
5409         if (rc) {
5410                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5411                 rc = -ENODEV;
5412                 goto err_hardsetup;
5413         }
5414
5415         qeth_print_status_message(card);
5416
5417         if (card->dev->reg_state != NETREG_REGISTERED)
5418                 /* no need for locking / error handling at this early stage: */
5419                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5420
5421         rc = disc->set_online(card, carrier_ok);
5422         if (rc)
5423                 goto err_online;
5424
5425         /* let user_space know that device is online */
5426         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5427
5428         mutex_unlock(&card->conf_mutex);
5429         return 0;
5430
5431 err_online:
5432 err_hardsetup:
5433         qeth_qdio_clear_card(card, 0);
5434         qeth_clear_working_pool_list(card);
5435         qeth_flush_local_addrs(card);
5436
5437         qeth_stop_channel(&card->data);
5438         qeth_stop_channel(&card->write);
5439         qeth_stop_channel(&card->read);
5440         qdio_free(CARD_DDEV(card));
5441
5442         mutex_unlock(&card->conf_mutex);
5443         return rc;
5444 }
5445
5446 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5447                      bool resetting)
5448 {
5449         int rc, rc2, rc3;
5450
5451         mutex_lock(&card->conf_mutex);
5452         QETH_CARD_TEXT(card, 3, "setoffl");
5453
5454         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5455                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5456                 card->info.hwtrap = 1;
5457         }
5458
5459         /* cancel any stalled cmd that might block the rtnl: */
5460         qeth_clear_ipacmd_list(card);
5461
5462         rtnl_lock();
5463         card->info.open_when_online = card->dev->flags & IFF_UP;
5464         dev_close(card->dev);
5465         netif_device_detach(card->dev);
5466         netif_carrier_off(card->dev);
5467         rtnl_unlock();
5468
5469         cancel_work_sync(&card->rx_mode_work);
5470
5471         disc->set_offline(card);
5472
5473         qeth_qdio_clear_card(card, 0);
5474         qeth_drain_output_queues(card);
5475         qeth_clear_working_pool_list(card);
5476         qeth_flush_local_addrs(card);
5477         card->info.promisc_mode = 0;
5478
5479         rc  = qeth_stop_channel(&card->data);
5480         rc2 = qeth_stop_channel(&card->write);
5481         rc3 = qeth_stop_channel(&card->read);
5482         if (!rc)
5483                 rc = (rc2) ? rc2 : rc3;
5484         if (rc)
5485                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5486         qdio_free(CARD_DDEV(card));
5487
5488         /* let user_space know that device is offline */
5489         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5490
5491         mutex_unlock(&card->conf_mutex);
5492         return 0;
5493 }
5494 EXPORT_SYMBOL_GPL(qeth_set_offline);
5495
5496 static int qeth_do_reset(void *data)
5497 {
5498         const struct qeth_discipline *disc;
5499         struct qeth_card *card = data;
5500         int rc;
5501
5502         /* Lock-free, other users will block until we are done. */
5503         disc = card->discipline;
5504
5505         QETH_CARD_TEXT(card, 2, "recover1");
5506         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5507                 return 0;
5508         QETH_CARD_TEXT(card, 2, "recover2");
5509         dev_warn(&card->gdev->dev,
5510                  "A recovery process has been started for the device\n");
5511
5512         qeth_set_offline(card, disc, true);
5513         rc = qeth_set_online(card, disc);
5514         if (!rc) {
5515                 dev_info(&card->gdev->dev,
5516                          "Device successfully recovered!\n");
5517         } else {
5518                 qeth_set_offline(card, disc, true);
5519                 ccwgroup_set_offline(card->gdev, false);
5520                 dev_warn(&card->gdev->dev,
5521                          "The qeth device driver failed to recover an error on the device\n");
5522         }
5523         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5524         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5525         return 0;
5526 }
5527
5528 #if IS_ENABLED(CONFIG_QETH_L3)
5529 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5530                                 struct qeth_hdr *hdr)
5531 {
5532         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5533         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5534         struct net_device *dev = skb->dev;
5535
5536         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5537                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5538                                 "FAKELL", skb->len);
5539                 return;
5540         }
5541
5542         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5543                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5544                                                              ETH_P_IP;
5545                 unsigned char tg_addr[ETH_ALEN];
5546
5547                 skb_reset_network_header(skb);
5548                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5549                 case QETH_CAST_MULTICAST:
5550                         if (prot == ETH_P_IP)
5551                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5552                         else
5553                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5554                         QETH_CARD_STAT_INC(card, rx_multicast);
5555                         break;
5556                 case QETH_CAST_BROADCAST:
5557                         ether_addr_copy(tg_addr, dev->broadcast);
5558                         QETH_CARD_STAT_INC(card, rx_multicast);
5559                         break;
5560                 default:
5561                         if (card->options.sniffer)
5562                                 skb->pkt_type = PACKET_OTHERHOST;
5563                         ether_addr_copy(tg_addr, dev->dev_addr);
5564                 }
5565
5566                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5567                         dev_hard_header(skb, dev, prot, tg_addr,
5568                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5569                 else
5570                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5571                                         skb->len);
5572         }
5573
5574         /* copy VLAN tag from hdr into skb */
5575         if (!card->options.sniffer &&
5576             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5577                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5578                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5579                                 l3_hdr->vlan_id :
5580                                 l3_hdr->next_hop.rx.vlan_id;
5581
5582                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5583         }
5584 }
5585 #endif
5586
5587 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5588                              struct qeth_hdr *hdr, bool uses_frags)
5589 {
5590         struct napi_struct *napi = &card->napi;
5591         bool is_cso;
5592
5593         switch (hdr->hdr.l2.id) {
5594 #if IS_ENABLED(CONFIG_QETH_L3)
5595         case QETH_HEADER_TYPE_LAYER3:
5596                 qeth_l3_rebuild_skb(card, skb, hdr);
5597                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5598                 break;
5599 #endif
5600         case QETH_HEADER_TYPE_LAYER2:
5601                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5602                 break;
5603         default:
5604                 /* never happens */
5605                 if (uses_frags)
5606                         napi_free_frags(napi);
5607                 else
5608                         kfree_skb(skb);
5609                 return;
5610         }
5611
5612         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5613                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5614                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5615         } else {
5616                 skb->ip_summed = CHECKSUM_NONE;
5617         }
5618
5619         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5620         QETH_CARD_STAT_INC(card, rx_packets);
5621         if (skb_is_nonlinear(skb)) {
5622                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5623                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5624                                    skb_shinfo(skb)->nr_frags);
5625         }
5626
5627         if (uses_frags) {
5628                 napi_gro_frags(napi);
5629         } else {
5630                 skb->protocol = eth_type_trans(skb, skb->dev);
5631                 napi_gro_receive(napi, skb);
5632         }
5633 }
5634
5635 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5636 {
5637         struct page *page = virt_to_page(data);
5638         unsigned int next_frag;
5639
5640         next_frag = skb_shinfo(skb)->nr_frags;
5641         get_page(page);
5642         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5643                         data_len);
5644 }
5645
5646 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5647 {
5648         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5649 }
5650
5651 static int qeth_extract_skb(struct qeth_card *card,
5652                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5653                             int *__offset)
5654 {
5655         struct qeth_priv *priv = netdev_priv(card->dev);
5656         struct qdio_buffer *buffer = qethbuffer->buffer;
5657         struct napi_struct *napi = &card->napi;
5658         struct qdio_buffer_element *element;
5659         unsigned int linear_len = 0;
5660         bool uses_frags = false;
5661         int offset = *__offset;
5662         bool use_rx_sg = false;
5663         unsigned int headroom;
5664         struct qeth_hdr *hdr;
5665         struct sk_buff *skb;
5666         int skb_len = 0;
5667
5668         element = &buffer->element[*element_no];
5669
5670 next_packet:
5671         /* qeth_hdr must not cross element boundaries */
5672         while (element->length < offset + sizeof(struct qeth_hdr)) {
5673                 if (qeth_is_last_sbale(element))
5674                         return -ENODATA;
5675                 element++;
5676                 offset = 0;
5677         }
5678
5679         hdr = phys_to_virt(element->addr) + offset;
5680         offset += sizeof(*hdr);
5681         skb = NULL;
5682
5683         switch (hdr->hdr.l2.id) {
5684         case QETH_HEADER_TYPE_LAYER2:
5685                 skb_len = hdr->hdr.l2.pkt_length;
5686                 linear_len = ETH_HLEN;
5687                 headroom = 0;
5688                 break;
5689         case QETH_HEADER_TYPE_LAYER3:
5690                 skb_len = hdr->hdr.l3.length;
5691                 if (!IS_LAYER3(card)) {
5692                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5693                         goto walk_packet;
5694                 }
5695
5696                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5697                         linear_len = ETH_HLEN;
5698                         headroom = 0;
5699                         break;
5700                 }
5701
5702                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5703                         linear_len = sizeof(struct ipv6hdr);
5704                 else
5705                         linear_len = sizeof(struct iphdr);
5706                 headroom = ETH_HLEN;
5707                 break;
5708         default:
5709                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5710                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5711                 else
5712                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5713
5714                 /* Can't determine packet length, drop the whole buffer. */
5715                 return -EPROTONOSUPPORT;
5716         }
5717
5718         if (skb_len < linear_len) {
5719                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5720                 goto walk_packet;
5721         }
5722
5723         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5724                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5725                      !atomic_read(&card->force_alloc_skb));
5726
5727         if (use_rx_sg) {
5728                 /* QETH_CQ_ENABLED only: */
5729                 if (qethbuffer->rx_skb &&
5730                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5731                         skb = qethbuffer->rx_skb;
5732                         qethbuffer->rx_skb = NULL;
5733                         goto use_skb;
5734                 }
5735
5736                 skb = napi_get_frags(napi);
5737                 if (!skb) {
5738                         /* -ENOMEM, no point in falling back further. */
5739                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5740                         goto walk_packet;
5741                 }
5742
5743                 if (skb_tailroom(skb) >= linear_len + headroom) {
5744                         uses_frags = true;
5745                         goto use_skb;
5746                 }
5747
5748                 netdev_info_once(card->dev,
5749                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5750                                  linear_len + headroom, skb_tailroom(skb));
5751                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5752         }
5753
5754         linear_len = skb_len;
5755         skb = napi_alloc_skb(napi, linear_len + headroom);
5756         if (!skb) {
5757                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5758                 goto walk_packet;
5759         }
5760
5761 use_skb:
5762         if (headroom)
5763                 skb_reserve(skb, headroom);
5764 walk_packet:
5765         while (skb_len) {
5766                 int data_len = min(skb_len, (int)(element->length - offset));
5767                 char *data = phys_to_virt(element->addr) + offset;
5768
5769                 skb_len -= data_len;
5770                 offset += data_len;
5771
5772                 /* Extract data from current element: */
5773                 if (skb && data_len) {
5774                         if (linear_len) {
5775                                 unsigned int copy_len;
5776
5777                                 copy_len = min_t(unsigned int, linear_len,
5778                                                  data_len);
5779
5780                                 skb_put_data(skb, data, copy_len);
5781                                 linear_len -= copy_len;
5782                                 data_len -= copy_len;
5783                                 data += copy_len;
5784                         }
5785
5786                         if (data_len)
5787                                 qeth_create_skb_frag(skb, data, data_len);
5788                 }
5789
5790                 /* Step forward to next element: */
5791                 if (skb_len) {
5792                         if (qeth_is_last_sbale(element)) {
5793                                 QETH_CARD_TEXT(card, 4, "unexeob");
5794                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5795                                 if (skb) {
5796                                         if (uses_frags)
5797                                                 napi_free_frags(napi);
5798                                         else
5799                                                 kfree_skb(skb);
5800                                         QETH_CARD_STAT_INC(card,
5801                                                            rx_length_errors);
5802                                 }
5803                                 return -EMSGSIZE;
5804                         }
5805                         element++;
5806                         offset = 0;
5807                 }
5808         }
5809
5810         /* This packet was skipped, go get another one: */
5811         if (!skb)
5812                 goto next_packet;
5813
5814         *element_no = element - &buffer->element[0];
5815         *__offset = offset;
5816
5817         qeth_receive_skb(card, skb, hdr, uses_frags);
5818         return 0;
5819 }
5820
5821 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5822                                       struct qeth_qdio_buffer *buf, bool *done)
5823 {
5824         unsigned int work_done = 0;
5825
5826         while (budget) {
5827                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5828                                      &card->rx.e_offset)) {
5829                         *done = true;
5830                         break;
5831                 }
5832
5833                 work_done++;
5834                 budget--;
5835         }
5836
5837         return work_done;
5838 }
5839
5840 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5841 {
5842         struct qeth_rx *ctx = &card->rx;
5843         unsigned int work_done = 0;
5844
5845         while (budget > 0) {
5846                 struct qeth_qdio_buffer *buffer;
5847                 unsigned int skbs_done = 0;
5848                 bool done = false;
5849
5850                 /* Fetch completed RX buffers: */
5851                 if (!card->rx.b_count) {
5852                         card->rx.qdio_err = 0;
5853                         card->rx.b_count = qdio_inspect_queue(CARD_DDEV(card),
5854                                                               0, true,
5855                                                               &card->rx.b_index,
5856                                                               &card->rx.qdio_err);
5857                         if (card->rx.b_count <= 0) {
5858                                 card->rx.b_count = 0;
5859                                 break;
5860                         }
5861                 }
5862
5863                 /* Process one completed RX buffer: */
5864                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5865                 if (!(card->rx.qdio_err &&
5866                       qeth_check_qdio_errors(card, buffer->buffer,
5867                                              card->rx.qdio_err, "qinerr")))
5868                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5869                                                       &done);
5870                 else
5871                         done = true;
5872
5873                 work_done += skbs_done;
5874                 budget -= skbs_done;
5875
5876                 if (done) {
5877                         QETH_CARD_STAT_INC(card, rx_bufs);
5878                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5879                         buffer->pool_entry = NULL;
5880                         card->rx.b_count--;
5881                         ctx->bufs_refill++;
5882                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5883                                                                  ctx->bufs_refill);
5884
5885                         /* Step forward to next buffer: */
5886                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5887                         card->rx.buf_element = 0;
5888                         card->rx.e_offset = 0;
5889                 }
5890         }
5891
5892         return work_done;
5893 }
5894
5895 static void qeth_cq_poll(struct qeth_card *card)
5896 {
5897         unsigned int work_done = 0;
5898
5899         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5900                 unsigned int start, error;
5901                 int completed;
5902
5903                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5904                                                &error);
5905                 if (completed <= 0)
5906                         return;
5907
5908                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5909                 work_done += completed;
5910         }
5911 }
5912
5913 int qeth_poll(struct napi_struct *napi, int budget)
5914 {
5915         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5916         unsigned int work_done;
5917
5918         work_done = qeth_rx_poll(card, budget);
5919
5920         if (qeth_use_tx_irqs(card)) {
5921                 struct qeth_qdio_out_q *queue;
5922                 unsigned int i;
5923
5924                 qeth_for_each_output_queue(card, queue, i) {
5925                         if (!qeth_out_queue_is_empty(queue))
5926                                 napi_schedule(&queue->napi);
5927                 }
5928         }
5929
5930         if (card->options.cq == QETH_CQ_ENABLED)
5931                 qeth_cq_poll(card);
5932
5933         if (budget) {
5934                 struct qeth_rx *ctx = &card->rx;
5935
5936                 /* Process any substantial refill backlog: */
5937                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5938
5939                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5940                 if (work_done >= budget)
5941                         return work_done;
5942         }
5943
5944         if (napi_complete_done(napi, work_done) &&
5945             qdio_start_irq(CARD_DDEV(card)))
5946                 napi_schedule(napi);
5947
5948         return work_done;
5949 }
5950 EXPORT_SYMBOL_GPL(qeth_poll);
5951
5952 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5953                                  unsigned int bidx, unsigned int qdio_error,
5954                                  int budget)
5955 {
5956         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5957         u8 sflags = buffer->buffer->element[15].sflags;
5958         struct qeth_card *card = queue->card;
5959         bool error = !!qdio_error;
5960
5961         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5962                 struct qaob *aob = buffer->aob;
5963                 struct qeth_qaob_priv1 *priv;
5964                 enum iucv_tx_notify notify;
5965
5966                 if (!aob) {
5967                         netdev_WARN_ONCE(card->dev,
5968                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5969                                          bidx, queue->queue_no);
5970                         qeth_schedule_recovery(card);
5971                         return;
5972                 }
5973
5974                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5975
5976                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5977                 /* QAOB hasn't completed yet: */
5978                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5979                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5980
5981                         /* Prepare the queue slot for immediate re-use: */
5982                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5983                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5984                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5985                                 qeth_schedule_recovery(card);
5986                         }
5987
5988                         list_add(&buffer->list_entry, &queue->pending_bufs);
5989                         /* Skip clearing the buffer: */
5990                         return;
5991                 }
5992
5993                 /* QAOB already completed: */
5994                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5995                 qeth_notify_skbs(queue, buffer, notify);
5996                 error = !!aob->aorc;
5997                 memset(aob, 0, sizeof(*aob));
5998         } else if (card->options.cq == QETH_CQ_ENABLED) {
5999                 qeth_notify_skbs(queue, buffer,
6000                                  qeth_compute_cq_notification(sflags, 0));
6001         }
6002
6003         qeth_clear_output_buffer(queue, buffer, error, budget);
6004 }
6005
6006 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6007 {
6008         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6009         unsigned int queue_no = queue->queue_no;
6010         struct qeth_card *card = queue->card;
6011         struct net_device *dev = card->dev;
6012         unsigned int work_done = 0;
6013         struct netdev_queue *txq;
6014
6015         if (IS_IQD(card))
6016                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6017         else
6018                 txq = netdev_get_tx_queue(dev, queue_no);
6019
6020         while (1) {
6021                 unsigned int start, error, i;
6022                 unsigned int packets = 0;
6023                 unsigned int bytes = 0;
6024                 int completed;
6025
6026                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6027
6028                 if (qeth_out_queue_is_empty(queue)) {
6029                         napi_complete(napi);
6030                         return 0;
6031                 }
6032
6033                 /* Give the CPU a breather: */
6034                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6035                         QETH_TXQ_STAT_INC(queue, completion_yield);
6036                         if (napi_complete_done(napi, 0))
6037                                 napi_schedule(napi);
6038                         return 0;
6039                 }
6040
6041                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6042                                                &start, &error);
6043                 if (completed <= 0) {
6044                         /* Ensure we see TX completion for pending work: */
6045                         if (napi_complete_done(napi, 0) &&
6046                             !atomic_read(&queue->set_pci_flags_count))
6047                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
6048                         return 0;
6049                 }
6050
6051                 for (i = start; i < start + completed; i++) {
6052                         struct qeth_qdio_out_buffer *buffer;
6053                         unsigned int bidx = QDIO_BUFNR(i);
6054
6055                         buffer = queue->bufs[bidx];
6056                         packets += buffer->frames;
6057                         bytes += buffer->bytes;
6058
6059                         qeth_handle_send_error(card, buffer, error);
6060                         if (IS_IQD(card))
6061                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
6062                         else
6063                                 qeth_clear_output_buffer(queue, buffer, error,
6064                                                          budget);
6065                 }
6066
6067                 atomic_sub(completed, &queue->used_buffers);
6068                 work_done += completed;
6069                 if (IS_IQD(card))
6070                         netdev_tx_completed_queue(txq, packets, bytes);
6071                 else
6072                         qeth_check_outbound_queue(queue);
6073
6074                 /* xmit may have observed the full-condition, but not yet
6075                  * stopped the txq. In which case the code below won't trigger.
6076                  * So before returning, xmit will re-check the txq's fill level
6077                  * and wake it up if needed.
6078                  */
6079                 if (netif_tx_queue_stopped(txq) &&
6080                     !qeth_out_queue_is_full(queue))
6081                         netif_tx_wake_queue(txq);
6082         }
6083 }
6084
6085 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6086 {
6087         if (!cmd->hdr.return_code)
6088                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6089         return cmd->hdr.return_code;
6090 }
6091
6092 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6093                                         struct qeth_reply *reply,
6094                                         unsigned long data)
6095 {
6096         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6097         struct qeth_ipa_caps *caps = reply->param;
6098
6099         if (qeth_setassparms_inspect_rc(cmd))
6100                 return -EIO;
6101
6102         caps->supported = cmd->data.setassparms.data.caps.supported;
6103         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6104         return 0;
6105 }
6106
6107 int qeth_setassparms_cb(struct qeth_card *card,
6108                         struct qeth_reply *reply, unsigned long data)
6109 {
6110         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6111
6112         QETH_CARD_TEXT(card, 4, "defadpcb");
6113
6114         if (cmd->hdr.return_code)
6115                 return -EIO;
6116
6117         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6118         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6119                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6120         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6121                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6122         return 0;
6123 }
6124 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6125
6126 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6127                                                  enum qeth_ipa_funcs ipa_func,
6128                                                  u16 cmd_code,
6129                                                  unsigned int data_length,
6130                                                  enum qeth_prot_versions prot)
6131 {
6132         struct qeth_ipacmd_setassparms *setassparms;
6133         struct qeth_ipacmd_setassparms_hdr *hdr;
6134         struct qeth_cmd_buffer *iob;
6135
6136         QETH_CARD_TEXT(card, 4, "getasscm");
6137         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6138                                  data_length +
6139                                  offsetof(struct qeth_ipacmd_setassparms,
6140                                           data));
6141         if (!iob)
6142                 return NULL;
6143
6144         setassparms = &__ipa_cmd(iob)->data.setassparms;
6145         setassparms->assist_no = ipa_func;
6146
6147         hdr = &setassparms->hdr;
6148         hdr->length = sizeof(*hdr) + data_length;
6149         hdr->command_code = cmd_code;
6150         return iob;
6151 }
6152 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6153
6154 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6155                                       enum qeth_ipa_funcs ipa_func,
6156                                       u16 cmd_code, u32 *data,
6157                                       enum qeth_prot_versions prot)
6158 {
6159         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6160         struct qeth_cmd_buffer *iob;
6161
6162         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6163         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6164         if (!iob)
6165                 return -ENOMEM;
6166
6167         if (data)
6168                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6169         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6170 }
6171 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6172
6173 static void qeth_unregister_dbf_views(void)
6174 {
6175         int x;
6176
6177         for (x = 0; x < QETH_DBF_INFOS; x++) {
6178                 debug_unregister(qeth_dbf[x].id);
6179                 qeth_dbf[x].id = NULL;
6180         }
6181 }
6182
6183 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6184 {
6185         char dbf_txt_buf[32];
6186         va_list args;
6187
6188         if (!debug_level_enabled(id, level))
6189                 return;
6190         va_start(args, fmt);
6191         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6192         va_end(args);
6193         debug_text_event(id, level, dbf_txt_buf);
6194 }
6195 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6196
6197 static int qeth_register_dbf_views(void)
6198 {
6199         int ret;
6200         int x;
6201
6202         for (x = 0; x < QETH_DBF_INFOS; x++) {
6203                 /* register the areas */
6204                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6205                                                 qeth_dbf[x].pages,
6206                                                 qeth_dbf[x].areas,
6207                                                 qeth_dbf[x].len);
6208                 if (qeth_dbf[x].id == NULL) {
6209                         qeth_unregister_dbf_views();
6210                         return -ENOMEM;
6211                 }
6212
6213                 /* register a view */
6214                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6215                 if (ret) {
6216                         qeth_unregister_dbf_views();
6217                         return ret;
6218                 }
6219
6220                 /* set a passing level */
6221                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6222         }
6223
6224         return 0;
6225 }
6226
6227 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6228
6229 int qeth_setup_discipline(struct qeth_card *card,
6230                           enum qeth_discipline_id discipline)
6231 {
6232         int rc;
6233
6234         mutex_lock(&qeth_mod_mutex);
6235         switch (discipline) {
6236         case QETH_DISCIPLINE_LAYER3:
6237                 card->discipline = try_then_request_module(
6238                         symbol_get(qeth_l3_discipline), "qeth_l3");
6239                 break;
6240         case QETH_DISCIPLINE_LAYER2:
6241                 card->discipline = try_then_request_module(
6242                         symbol_get(qeth_l2_discipline), "qeth_l2");
6243                 break;
6244         default:
6245                 break;
6246         }
6247         mutex_unlock(&qeth_mod_mutex);
6248
6249         if (!card->discipline) {
6250                 dev_err(&card->gdev->dev, "There is no kernel module to "
6251                         "support discipline %d\n", discipline);
6252                 return -EINVAL;
6253         }
6254
6255         rc = card->discipline->setup(card->gdev);
6256         if (rc) {
6257                 if (discipline == QETH_DISCIPLINE_LAYER2)
6258                         symbol_put(qeth_l2_discipline);
6259                 else
6260                         symbol_put(qeth_l3_discipline);
6261                 card->discipline = NULL;
6262
6263                 return rc;
6264         }
6265
6266         card->options.layer = discipline;
6267         return 0;
6268 }
6269
6270 void qeth_remove_discipline(struct qeth_card *card)
6271 {
6272         card->discipline->remove(card->gdev);
6273
6274         if (IS_LAYER2(card))
6275                 symbol_put(qeth_l2_discipline);
6276         else
6277                 symbol_put(qeth_l3_discipline);
6278         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6279         card->discipline = NULL;
6280 }
6281
6282 static const struct device_type qeth_generic_devtype = {
6283         .name = "qeth_generic",
6284 };
6285
6286 #define DBF_NAME_LEN    20
6287
6288 struct qeth_dbf_entry {
6289         char dbf_name[DBF_NAME_LEN];
6290         debug_info_t *dbf_info;
6291         struct list_head dbf_list;
6292 };
6293
6294 static LIST_HEAD(qeth_dbf_list);
6295 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6296
6297 static debug_info_t *qeth_get_dbf_entry(char *name)
6298 {
6299         struct qeth_dbf_entry *entry;
6300         debug_info_t *rc = NULL;
6301
6302         mutex_lock(&qeth_dbf_list_mutex);
6303         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6304                 if (strcmp(entry->dbf_name, name) == 0) {
6305                         rc = entry->dbf_info;
6306                         break;
6307                 }
6308         }
6309         mutex_unlock(&qeth_dbf_list_mutex);
6310         return rc;
6311 }
6312
6313 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6314 {
6315         struct qeth_dbf_entry *new_entry;
6316
6317         card->debug = debug_register(name, 2, 1, 8);
6318         if (!card->debug) {
6319                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6320                 goto err;
6321         }
6322         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6323                 goto err_dbg;
6324         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6325         if (!new_entry)
6326                 goto err_dbg;
6327         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6328         new_entry->dbf_info = card->debug;
6329         mutex_lock(&qeth_dbf_list_mutex);
6330         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6331         mutex_unlock(&qeth_dbf_list_mutex);
6332
6333         return 0;
6334
6335 err_dbg:
6336         debug_unregister(card->debug);
6337 err:
6338         return -ENOMEM;
6339 }
6340
6341 static void qeth_clear_dbf_list(void)
6342 {
6343         struct qeth_dbf_entry *entry, *tmp;
6344
6345         mutex_lock(&qeth_dbf_list_mutex);
6346         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6347                 list_del(&entry->dbf_list);
6348                 debug_unregister(entry->dbf_info);
6349                 kfree(entry);
6350         }
6351         mutex_unlock(&qeth_dbf_list_mutex);
6352 }
6353
6354 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6355 {
6356         struct net_device *dev;
6357         struct qeth_priv *priv;
6358
6359         switch (card->info.type) {
6360         case QETH_CARD_TYPE_IQD:
6361                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6362                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6363                 break;
6364         case QETH_CARD_TYPE_OSM:
6365                 dev = alloc_etherdev(sizeof(*priv));
6366                 break;
6367         default:
6368                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6369         }
6370
6371         if (!dev)
6372                 return NULL;
6373
6374         priv = netdev_priv(dev);
6375         priv->rx_copybreak = QETH_RX_COPYBREAK;
6376         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6377
6378         dev->ml_priv = card;
6379         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6380         dev->min_mtu = 576;
6381          /* initialized when device first goes online: */
6382         dev->max_mtu = 0;
6383         dev->mtu = 0;
6384         SET_NETDEV_DEV(dev, &card->gdev->dev);
6385         netif_carrier_off(dev);
6386
6387         dev->ethtool_ops = &qeth_ethtool_ops;
6388         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6389         dev->hw_features |= NETIF_F_SG;
6390         dev->vlan_features |= NETIF_F_SG;
6391         if (IS_IQD(card))
6392                 dev->features |= NETIF_F_SG;
6393
6394         return dev;
6395 }
6396
6397 struct net_device *qeth_clone_netdev(struct net_device *orig)
6398 {
6399         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6400
6401         if (!clone)
6402                 return NULL;
6403
6404         clone->dev_port = orig->dev_port;
6405         return clone;
6406 }
6407
6408 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6409 {
6410         struct qeth_card *card;
6411         struct device *dev;
6412         int rc;
6413         enum qeth_discipline_id enforced_disc;
6414         char dbf_name[DBF_NAME_LEN];
6415
6416         QETH_DBF_TEXT(SETUP, 2, "probedev");
6417
6418         dev = &gdev->dev;
6419         if (!get_device(dev))
6420                 return -ENODEV;
6421
6422         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6423
6424         card = qeth_alloc_card(gdev);
6425         if (!card) {
6426                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6427                 rc = -ENOMEM;
6428                 goto err_dev;
6429         }
6430
6431         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6432                 dev_name(&gdev->dev));
6433         card->debug = qeth_get_dbf_entry(dbf_name);
6434         if (!card->debug) {
6435                 rc = qeth_add_dbf_entry(card, dbf_name);
6436                 if (rc)
6437                         goto err_card;
6438         }
6439
6440         qeth_setup_card(card);
6441         card->dev = qeth_alloc_netdev(card);
6442         if (!card->dev) {
6443                 rc = -ENOMEM;
6444                 goto err_card;
6445         }
6446
6447         qeth_determine_capabilities(card);
6448         qeth_set_blkt_defaults(card);
6449
6450         card->qdio.no_out_queues = card->dev->num_tx_queues;
6451         rc = qeth_update_from_chp_desc(card);
6452         if (rc)
6453                 goto err_chp_desc;
6454
6455         gdev->dev.groups = qeth_dev_groups;
6456
6457         enforced_disc = qeth_enforce_discipline(card);
6458         switch (enforced_disc) {
6459         case QETH_DISCIPLINE_UNDETERMINED:
6460                 gdev->dev.type = &qeth_generic_devtype;
6461                 break;
6462         default:
6463                 card->info.layer_enforced = true;
6464                 /* It's so early that we don't need the discipline_mutex yet. */
6465                 rc = qeth_setup_discipline(card, enforced_disc);
6466                 if (rc)
6467                         goto err_setup_disc;
6468
6469                 break;
6470         }
6471
6472         return 0;
6473
6474 err_setup_disc:
6475 err_chp_desc:
6476         free_netdev(card->dev);
6477 err_card:
6478         qeth_core_free_card(card);
6479 err_dev:
6480         put_device(dev);
6481         return rc;
6482 }
6483
6484 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6485 {
6486         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6487
6488         QETH_CARD_TEXT(card, 2, "removedv");
6489
6490         mutex_lock(&card->discipline_mutex);
6491         if (card->discipline)
6492                 qeth_remove_discipline(card);
6493         mutex_unlock(&card->discipline_mutex);
6494
6495         qeth_free_qdio_queues(card);
6496
6497         free_netdev(card->dev);
6498         qeth_core_free_card(card);
6499         put_device(&gdev->dev);
6500 }
6501
6502 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6503 {
6504         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6505         int rc = 0;
6506         enum qeth_discipline_id def_discipline;
6507
6508         mutex_lock(&card->discipline_mutex);
6509         if (!card->discipline) {
6510                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6511                                                 QETH_DISCIPLINE_LAYER2;
6512                 rc = qeth_setup_discipline(card, def_discipline);
6513                 if (rc)
6514                         goto err;
6515         }
6516
6517         rc = qeth_set_online(card, card->discipline);
6518
6519 err:
6520         mutex_unlock(&card->discipline_mutex);
6521         return rc;
6522 }
6523
6524 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6525 {
6526         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6527         int rc;
6528
6529         mutex_lock(&card->discipline_mutex);
6530         rc = qeth_set_offline(card, card->discipline, false);
6531         mutex_unlock(&card->discipline_mutex);
6532
6533         return rc;
6534 }
6535
6536 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6537 {
6538         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6539
6540         qeth_set_allowed_threads(card, 0, 1);
6541         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6542                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6543         qeth_qdio_clear_card(card, 0);
6544         qeth_drain_output_queues(card);
6545         qdio_free(CARD_DDEV(card));
6546 }
6547
6548 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6549                            size_t count)
6550 {
6551         int err;
6552
6553         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6554                                   buf);
6555
6556         return err ? err : count;
6557 }
6558 static DRIVER_ATTR_WO(group);
6559
6560 static struct attribute *qeth_drv_attrs[] = {
6561         &driver_attr_group.attr,
6562         NULL,
6563 };
6564 static struct attribute_group qeth_drv_attr_group = {
6565         .attrs = qeth_drv_attrs,
6566 };
6567 static const struct attribute_group *qeth_drv_attr_groups[] = {
6568         &qeth_drv_attr_group,
6569         NULL,
6570 };
6571
6572 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6573         .driver = {
6574                 .groups = qeth_drv_attr_groups,
6575                 .owner = THIS_MODULE,
6576                 .name = "qeth",
6577         },
6578         .ccw_driver = &qeth_ccw_driver,
6579         .setup = qeth_core_probe_device,
6580         .remove = qeth_core_remove_device,
6581         .set_online = qeth_core_set_online,
6582         .set_offline = qeth_core_set_offline,
6583         .shutdown = qeth_core_shutdown,
6584 };
6585
6586 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6587 {
6588         struct qeth_card *card = dev->ml_priv;
6589         int rc = 0;
6590
6591         switch (cmd) {
6592         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6593                 rc = qeth_snmp_command(card, data);
6594                 break;
6595         case SIOC_QETH_GET_CARD_TYPE:
6596                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6597                     !IS_VM_NIC(card))
6598                         return 1;
6599                 return 0;
6600         case SIOC_QETH_QUERY_OAT:
6601                 rc = qeth_query_oat_command(card, data);
6602                 break;
6603         default:
6604                 rc = -EOPNOTSUPP;
6605         }
6606         if (rc)
6607                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6608         return rc;
6609 }
6610 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6611
6612 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6613 {
6614         struct qeth_card *card = dev->ml_priv;
6615         struct mii_ioctl_data *mii_data;
6616         int rc = 0;
6617
6618         switch (cmd) {
6619         case SIOCGMIIPHY:
6620                 mii_data = if_mii(rq);
6621                 mii_data->phy_id = 0;
6622                 break;
6623         case SIOCGMIIREG:
6624                 mii_data = if_mii(rq);
6625                 if (mii_data->phy_id != 0)
6626                         rc = -EINVAL;
6627                 else
6628                         mii_data->val_out = qeth_mdio_read(dev,
6629                                 mii_data->phy_id, mii_data->reg_num);
6630                 break;
6631         default:
6632                 return -EOPNOTSUPP;
6633         }
6634         if (rc)
6635                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6636         return rc;
6637 }
6638 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6639
6640 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6641                               unsigned long data)
6642 {
6643         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6644         u32 *features = reply->param;
6645
6646         if (qeth_setassparms_inspect_rc(cmd))
6647                 return -EIO;
6648
6649         *features = cmd->data.setassparms.data.flags_32bit;
6650         return 0;
6651 }
6652
6653 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6654                              enum qeth_prot_versions prot)
6655 {
6656         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6657                                                  NULL, prot);
6658 }
6659
6660 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6661                             enum qeth_prot_versions prot, u8 *lp2lp)
6662 {
6663         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6664         struct qeth_cmd_buffer *iob;
6665         struct qeth_ipa_caps caps;
6666         u32 features;
6667         int rc;
6668
6669         /* some L3 HW requires combined L3+L4 csum offload: */
6670         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6671             cstype == IPA_OUTBOUND_CHECKSUM)
6672                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6673
6674         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6675                                        prot);
6676         if (!iob)
6677                 return -ENOMEM;
6678
6679         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6680         if (rc)
6681                 return rc;
6682
6683         if ((required_features & features) != required_features) {
6684                 qeth_set_csum_off(card, cstype, prot);
6685                 return -EOPNOTSUPP;
6686         }
6687
6688         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6689                                        SETASS_DATA_SIZEOF(flags_32bit),
6690                                        prot);
6691         if (!iob) {
6692                 qeth_set_csum_off(card, cstype, prot);
6693                 return -ENOMEM;
6694         }
6695
6696         if (features & QETH_IPA_CHECKSUM_LP2LP)
6697                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6698         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6699         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6700         if (rc) {
6701                 qeth_set_csum_off(card, cstype, prot);
6702                 return rc;
6703         }
6704
6705         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6706             !qeth_ipa_caps_enabled(&caps, required_features)) {
6707                 qeth_set_csum_off(card, cstype, prot);
6708                 return -EOPNOTSUPP;
6709         }
6710
6711         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6712                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6713
6714         if (lp2lp)
6715                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6716
6717         return 0;
6718 }
6719
6720 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6721                              enum qeth_prot_versions prot, u8 *lp2lp)
6722 {
6723         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6724                     qeth_set_csum_off(card, cstype, prot);
6725 }
6726
6727 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6728                              unsigned long data)
6729 {
6730         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6731         struct qeth_tso_start_data *tso_data = reply->param;
6732
6733         if (qeth_setassparms_inspect_rc(cmd))
6734                 return -EIO;
6735
6736         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6737         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6738         return 0;
6739 }
6740
6741 static int qeth_set_tso_off(struct qeth_card *card,
6742                             enum qeth_prot_versions prot)
6743 {
6744         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6745                                                  IPA_CMD_ASS_STOP, NULL, prot);
6746 }
6747
6748 static int qeth_set_tso_on(struct qeth_card *card,
6749                            enum qeth_prot_versions prot)
6750 {
6751         struct qeth_tso_start_data tso_data;
6752         struct qeth_cmd_buffer *iob;
6753         struct qeth_ipa_caps caps;
6754         int rc;
6755
6756         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6757                                        IPA_CMD_ASS_START, 0, prot);
6758         if (!iob)
6759                 return -ENOMEM;
6760
6761         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6762         if (rc)
6763                 return rc;
6764
6765         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6766                 qeth_set_tso_off(card, prot);
6767                 return -EOPNOTSUPP;
6768         }
6769
6770         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6771                                        IPA_CMD_ASS_ENABLE,
6772                                        SETASS_DATA_SIZEOF(caps), prot);
6773         if (!iob) {
6774                 qeth_set_tso_off(card, prot);
6775                 return -ENOMEM;
6776         }
6777
6778         /* enable TSO capability */
6779         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6780                 QETH_IPA_LARGE_SEND_TCP;
6781         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6782         if (rc) {
6783                 qeth_set_tso_off(card, prot);
6784                 return rc;
6785         }
6786
6787         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6788             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6789                 qeth_set_tso_off(card, prot);
6790                 return -EOPNOTSUPP;
6791         }
6792
6793         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6794                  tso_data.mss);
6795         return 0;
6796 }
6797
6798 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6799                             enum qeth_prot_versions prot)
6800 {
6801         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6802 }
6803
6804 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6805 {
6806         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6807         int rc_ipv6;
6808
6809         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6810                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6811                                             QETH_PROT_IPV4, NULL);
6812         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6813                 /* no/one Offload Assist available, so the rc is trivial */
6814                 return rc_ipv4;
6815
6816         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6817                                     QETH_PROT_IPV6, NULL);
6818
6819         if (on)
6820                 /* enable: success if any Assist is active */
6821                 return (rc_ipv6) ? rc_ipv4 : 0;
6822
6823         /* disable: failure if any Assist is still active */
6824         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6825 }
6826
6827 /**
6828  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6829  * @dev:        a net_device
6830  */
6831 void qeth_enable_hw_features(struct net_device *dev)
6832 {
6833         struct qeth_card *card = dev->ml_priv;
6834         netdev_features_t features;
6835
6836         features = dev->features;
6837         /* force-off any feature that might need an IPA sequence.
6838          * netdev_update_features() will restart them.
6839          */
6840         dev->features &= ~dev->hw_features;
6841         /* toggle VLAN filter, so that VIDs are re-programmed: */
6842         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6843                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6844                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6845         }
6846         netdev_update_features(dev);
6847         if (features != dev->features)
6848                 dev_warn(&card->gdev->dev,
6849                          "Device recovery failed to restore all offload features\n");
6850 }
6851 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6852
6853 static void qeth_check_restricted_features(struct qeth_card *card,
6854                                            netdev_features_t changed,
6855                                            netdev_features_t actual)
6856 {
6857         netdev_features_t ipv6_features = NETIF_F_TSO6;
6858         netdev_features_t ipv4_features = NETIF_F_TSO;
6859
6860         if (!card->info.has_lp2lp_cso_v6)
6861                 ipv6_features |= NETIF_F_IPV6_CSUM;
6862         if (!card->info.has_lp2lp_cso_v4)
6863                 ipv4_features |= NETIF_F_IP_CSUM;
6864
6865         if ((changed & ipv6_features) && !(actual & ipv6_features))
6866                 qeth_flush_local_addrs6(card);
6867         if ((changed & ipv4_features) && !(actual & ipv4_features))
6868                 qeth_flush_local_addrs4(card);
6869 }
6870
6871 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6872 {
6873         struct qeth_card *card = dev->ml_priv;
6874         netdev_features_t changed = dev->features ^ features;
6875         int rc = 0;
6876
6877         QETH_CARD_TEXT(card, 2, "setfeat");
6878         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6879
6880         if ((changed & NETIF_F_IP_CSUM)) {
6881                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6882                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6883                                        &card->info.has_lp2lp_cso_v4);
6884                 if (rc)
6885                         changed ^= NETIF_F_IP_CSUM;
6886         }
6887         if (changed & NETIF_F_IPV6_CSUM) {
6888                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6889                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6890                                        &card->info.has_lp2lp_cso_v6);
6891                 if (rc)
6892                         changed ^= NETIF_F_IPV6_CSUM;
6893         }
6894         if (changed & NETIF_F_RXCSUM) {
6895                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6896                 if (rc)
6897                         changed ^= NETIF_F_RXCSUM;
6898         }
6899         if (changed & NETIF_F_TSO) {
6900                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6901                                       QETH_PROT_IPV4);
6902                 if (rc)
6903                         changed ^= NETIF_F_TSO;
6904         }
6905         if (changed & NETIF_F_TSO6) {
6906                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6907                                       QETH_PROT_IPV6);
6908                 if (rc)
6909                         changed ^= NETIF_F_TSO6;
6910         }
6911
6912         qeth_check_restricted_features(card, dev->features ^ features,
6913                                        dev->features ^ changed);
6914
6915         /* everything changed successfully? */
6916         if ((dev->features ^ features) == changed)
6917                 return 0;
6918         /* something went wrong. save changed features and return error */
6919         dev->features ^= changed;
6920         return -EIO;
6921 }
6922 EXPORT_SYMBOL_GPL(qeth_set_features);
6923
6924 netdev_features_t qeth_fix_features(struct net_device *dev,
6925                                     netdev_features_t features)
6926 {
6927         struct qeth_card *card = dev->ml_priv;
6928
6929         QETH_CARD_TEXT(card, 2, "fixfeat");
6930         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6931                 features &= ~NETIF_F_IP_CSUM;
6932         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6933                 features &= ~NETIF_F_IPV6_CSUM;
6934         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6935             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6936                 features &= ~NETIF_F_RXCSUM;
6937         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6938                 features &= ~NETIF_F_TSO;
6939         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6940                 features &= ~NETIF_F_TSO6;
6941
6942         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6943         return features;
6944 }
6945 EXPORT_SYMBOL_GPL(qeth_fix_features);
6946
6947 netdev_features_t qeth_features_check(struct sk_buff *skb,
6948                                       struct net_device *dev,
6949                                       netdev_features_t features)
6950 {
6951         struct qeth_card *card = dev->ml_priv;
6952
6953         /* Traffic with local next-hop is not eligible for some offloads: */
6954         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6955             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6956                 netdev_features_t restricted = 0;
6957
6958                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6959                         restricted |= NETIF_F_ALL_TSO;
6960
6961                 switch (vlan_get_protocol(skb)) {
6962                 case htons(ETH_P_IP):
6963                         if (!card->info.has_lp2lp_cso_v4)
6964                                 restricted |= NETIF_F_IP_CSUM;
6965
6966                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6967                                 features &= ~restricted;
6968                         break;
6969                 case htons(ETH_P_IPV6):
6970                         if (!card->info.has_lp2lp_cso_v6)
6971                                 restricted |= NETIF_F_IPV6_CSUM;
6972
6973                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6974                                 features &= ~restricted;
6975                         break;
6976                 default:
6977                         break;
6978                 }
6979         }
6980
6981         /* GSO segmentation builds skbs with
6982          *      a (small) linear part for the headers, and
6983          *      page frags for the data.
6984          * Compared to a linear skb, the header-only part consumes an
6985          * additional buffer element. This reduces buffer utilization, and
6986          * hurts throughput. So compress small segments into one element.
6987          */
6988         if (netif_needs_gso(skb, features)) {
6989                 /* match skb_segment(): */
6990                 unsigned int doffset = skb->data - skb_mac_header(skb);
6991                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6992                 unsigned int hroom = skb_headroom(skb);
6993
6994                 /* linearize only if resulting skb allocations are order-0: */
6995                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6996                         features &= ~NETIF_F_SG;
6997         }
6998
6999         return vlan_features_check(skb, features);
7000 }
7001 EXPORT_SYMBOL_GPL(qeth_features_check);
7002
7003 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7004 {
7005         struct qeth_card *card = dev->ml_priv;
7006         struct qeth_qdio_out_q *queue;
7007         unsigned int i;
7008
7009         QETH_CARD_TEXT(card, 5, "getstat");
7010
7011         stats->rx_packets = card->stats.rx_packets;
7012         stats->rx_bytes = card->stats.rx_bytes;
7013         stats->rx_errors = card->stats.rx_length_errors +
7014                            card->stats.rx_frame_errors +
7015                            card->stats.rx_fifo_errors;
7016         stats->rx_dropped = card->stats.rx_dropped_nomem +
7017                             card->stats.rx_dropped_notsupp +
7018                             card->stats.rx_dropped_runt;
7019         stats->multicast = card->stats.rx_multicast;
7020         stats->rx_length_errors = card->stats.rx_length_errors;
7021         stats->rx_frame_errors = card->stats.rx_frame_errors;
7022         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7023
7024         for (i = 0; i < card->qdio.no_out_queues; i++) {
7025                 queue = card->qdio.out_qs[i];
7026
7027                 stats->tx_packets += queue->stats.tx_packets;
7028                 stats->tx_bytes += queue->stats.tx_bytes;
7029                 stats->tx_errors += queue->stats.tx_errors;
7030                 stats->tx_dropped += queue->stats.tx_dropped;
7031         }
7032 }
7033 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7034
7035 #define TC_IQD_UCAST   0
7036 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7037                                      unsigned int ucast_txqs)
7038 {
7039         unsigned int prio;
7040
7041         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7042          * qeth_iqd_select_queue() deals with this.
7043          * For unicast traffic, we defer the queue selection to the stack.
7044          * By installing a trivial prio map that spans over only the unicast
7045          * queues, we can encourage the stack to spread the ucast traffic evenly
7046          * without selecting the mcast queue.
7047          */
7048
7049         /* One traffic class, spanning over all active ucast queues: */
7050         netdev_set_num_tc(dev, 1);
7051         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7052                             QETH_IQD_MIN_UCAST_TXQ);
7053
7054         /* Map all priorities to this traffic class: */
7055         for (prio = 0; prio <= TC_BITMASK; prio++)
7056                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7057 }
7058
7059 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7060 {
7061         struct net_device *dev = card->dev;
7062         int rc;
7063
7064         /* Per netif_setup_tc(), adjust the mapping first: */
7065         if (IS_IQD(card))
7066                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7067
7068         rc = netif_set_real_num_tx_queues(dev, count);
7069
7070         if (rc && IS_IQD(card))
7071                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7072
7073         return rc;
7074 }
7075 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7076
7077 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7078                           u8 cast_type, struct net_device *sb_dev)
7079 {
7080         u16 txq;
7081
7082         if (cast_type != RTN_UNICAST)
7083                 return QETH_IQD_MCAST_TXQ;
7084         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7085                 return QETH_IQD_MIN_UCAST_TXQ;
7086
7087         txq = netdev_pick_tx(dev, skb, sb_dev);
7088         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7089 }
7090 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7091
7092 int qeth_open(struct net_device *dev)
7093 {
7094         struct qeth_card *card = dev->ml_priv;
7095         struct qeth_qdio_out_q *queue;
7096         unsigned int i;
7097
7098         QETH_CARD_TEXT(card, 4, "qethopen");
7099
7100         card->data.state = CH_STATE_UP;
7101         netif_tx_start_all_queues(dev);
7102
7103         local_bh_disable();
7104         qeth_for_each_output_queue(card, queue, i) {
7105                 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7106                                   QETH_NAPI_WEIGHT);
7107                 napi_enable(&queue->napi);
7108                 napi_schedule(&queue->napi);
7109         }
7110
7111         napi_enable(&card->napi);
7112         napi_schedule(&card->napi);
7113         /* kick-start the NAPI softirq: */
7114         local_bh_enable();
7115
7116         return 0;
7117 }
7118 EXPORT_SYMBOL_GPL(qeth_open);
7119
7120 int qeth_stop(struct net_device *dev)
7121 {
7122         struct qeth_card *card = dev->ml_priv;
7123         struct qeth_qdio_out_q *queue;
7124         unsigned int i;
7125
7126         QETH_CARD_TEXT(card, 4, "qethstop");
7127
7128         napi_disable(&card->napi);
7129         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7130         qdio_stop_irq(CARD_DDEV(card));
7131
7132         /* Quiesce the NAPI instances: */
7133         qeth_for_each_output_queue(card, queue, i)
7134                 napi_disable(&queue->napi);
7135
7136         /* Stop .ndo_start_xmit, might still access queue->napi. */
7137         netif_tx_disable(dev);
7138
7139         qeth_for_each_output_queue(card, queue, i) {
7140                 del_timer_sync(&queue->timer);
7141                 /* Queues may get re-allocated, so remove the NAPIs. */
7142                 netif_napi_del(&queue->napi);
7143         }
7144
7145         return 0;
7146 }
7147 EXPORT_SYMBOL_GPL(qeth_stop);
7148
7149 static int __init qeth_core_init(void)
7150 {
7151         int rc;
7152
7153         pr_info("loading core functions\n");
7154
7155         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7156
7157         rc = qeth_register_dbf_views();
7158         if (rc)
7159                 goto dbf_err;
7160         qeth_core_root_dev = root_device_register("qeth");
7161         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7162         if (rc)
7163                 goto register_err;
7164         qeth_core_header_cache =
7165                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7166                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7167                                   0, NULL);
7168         if (!qeth_core_header_cache) {
7169                 rc = -ENOMEM;
7170                 goto slab_err;
7171         }
7172         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7173                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7174         if (!qeth_qdio_outbuf_cache) {
7175                 rc = -ENOMEM;
7176                 goto cqslab_err;
7177         }
7178
7179         qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7180                                             sizeof(struct qaob),
7181                                             sizeof(struct qaob),
7182                                             0, NULL);
7183         if (!qeth_qaob_cache) {
7184                 rc = -ENOMEM;
7185                 goto qaob_err;
7186         }
7187
7188         rc = ccw_driver_register(&qeth_ccw_driver);
7189         if (rc)
7190                 goto ccw_err;
7191         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7192         if (rc)
7193                 goto ccwgroup_err;
7194
7195         return 0;
7196
7197 ccwgroup_err:
7198         ccw_driver_unregister(&qeth_ccw_driver);
7199 ccw_err:
7200         kmem_cache_destroy(qeth_qaob_cache);
7201 qaob_err:
7202         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7203 cqslab_err:
7204         kmem_cache_destroy(qeth_core_header_cache);
7205 slab_err:
7206         root_device_unregister(qeth_core_root_dev);
7207 register_err:
7208         qeth_unregister_dbf_views();
7209 dbf_err:
7210         debugfs_remove_recursive(qeth_debugfs_root);
7211         pr_err("Initializing the qeth device driver failed\n");
7212         return rc;
7213 }
7214
7215 static void __exit qeth_core_exit(void)
7216 {
7217         qeth_clear_dbf_list();
7218         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7219         ccw_driver_unregister(&qeth_ccw_driver);
7220         kmem_cache_destroy(qeth_qaob_cache);
7221         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7222         kmem_cache_destroy(qeth_core_header_cache);
7223         root_device_unregister(qeth_core_root_dev);
7224         qeth_unregister_dbf_views();
7225         debugfs_remove_recursive(qeth_debugfs_root);
7226         pr_info("core functions removed\n");
7227 }
7228
7229 module_init(qeth_core_init);
7230 module_exit(qeth_core_exit);
7231 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
7232 MODULE_DESCRIPTION("qeth core functions");
7233 MODULE_LICENSE("GPL");