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