drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 static struct kmem_cache *qeth_core_header_cache;
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62 static struct kmem_cache *qeth_qaob_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73
  74 static const char *qeth_get_cardname(struct qeth_card *card)
  75 {
  76         if (IS_VM_NIC(card)) {
  77                 switch (card->info.type) {
  78                 case QETH_CARD_TYPE_OSD:
  79                         return " Virtual NIC QDIO";
  80                 case QETH_CARD_TYPE_IQD:
  81                         return " Virtual NIC Hiper";
  82                 case QETH_CARD_TYPE_OSM:
  83                         return " Virtual NIC QDIO - OSM";
  84                 case QETH_CARD_TYPE_OSX:
  85                         return " Virtual NIC QDIO - OSX";
  86                 default:
  87                         return " unknown";
  88                 }
  89         } else {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " OSD Express";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " HiperSockets";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " OSM QDIO";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " OSX QDIO";
  99                 default:
 100                         return " unknown";
 101                 }
 102         }
 103         return " n/a";
 104 }
 105
 106 /* max length to be returned: 14 */
 107 const char *qeth_get_cardname_short(struct qeth_card *card)
 108 {
 109         if (IS_VM_NIC(card)) {
 110                 switch (card->info.type) {
 111                 case QETH_CARD_TYPE_OSD:
 112                         return "Virt.NIC QDIO";
 113                 case QETH_CARD_TYPE_IQD:
 114                         return "Virt.NIC Hiper";
 115                 case QETH_CARD_TYPE_OSM:
 116                         return "Virt.NIC OSM";
 117                 case QETH_CARD_TYPE_OSX:
 118                         return "Virt.NIC OSX";
 119                 default:
 120                         return "unknown";
 121                 }
 122         } else {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         switch (card->info.link_type) {
 126                         case QETH_LINK_TYPE_FAST_ETH:
 127                                 return "OSD_100";
 128                         case QETH_LINK_TYPE_HSTR:
 129                                 return "HSTR";
 130                         case QETH_LINK_TYPE_GBIT_ETH:
 131                                 return "OSD_1000";
 132                         case QETH_LINK_TYPE_10GBIT_ETH:
 133                                 return "OSD_10GIG";
 134                         case QETH_LINK_TYPE_25GBIT_ETH:
 135                                 return "OSD_25GIG";
 136                         case QETH_LINK_TYPE_LANE_ETH100:
 137                                 return "OSD_FE_LANE";
 138                         case QETH_LINK_TYPE_LANE_TR:
 139                                 return "OSD_TR_LANE";
 140                         case QETH_LINK_TYPE_LANE_ETH1000:
 141                                 return "OSD_GbE_LANE";
 142                         case QETH_LINK_TYPE_LANE:
 143                                 return "OSD_ATM_LANE";
 144                         default:
 145                                 return "OSD_Express";
 146                         }
 147                 case QETH_CARD_TYPE_IQD:
 148                         return "HiperSockets";
 149                 case QETH_CARD_TYPE_OSM:
 150                         return "OSM_1000";
 151                 case QETH_CARD_TYPE_OSX:
 152                         return "OSX_10GIG";
 153                 default:
 154                         return "unknown";
 155                 }
 156         }
 157         return "n/a";
 158 }
 159
 160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 161                          int clear_start_mask)
 162 {
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&card->thread_mask_lock, flags);
 166         card->thread_allowed_mask = threads;
 167         if (clear_start_mask)
 168                 card->thread_start_mask &= threads;
 169         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 170         wake_up(&card->wait_q);
 171 }
 172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 173
 174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 175 {
 176         unsigned long flags;
 177         int rc = 0;
 178
 179         spin_lock_irqsave(&card->thread_mask_lock, flags);
 180         rc = (card->thread_running_mask & threads);
 181         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 182         return rc;
 183 }
 184 EXPORT_SYMBOL_GPL(qeth_threads_running);
 185
 186 static void qeth_clear_working_pool_list(struct qeth_card *card)
 187 {
 188         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 189         struct qeth_qdio_q *queue = card->qdio.in_q;
 190         unsigned int i;
 191
 192         QETH_CARD_TEXT(card, 5, "clwrklst");
 193         list_for_each_entry_safe(pool_entry, tmp,
 194                                  &card->qdio.in_buf_pool.entry_list, list)
 195                 list_del(&pool_entry->list);
 196
 197         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 198                 queue->bufs[i].pool_entry = NULL;
 199 }
 200
 201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 202 {
 203         unsigned int i;
 204
 205         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 206                 if (entry->elements[i])
 207                         __free_page(entry->elements[i]);
 208         }
 209
 210         kfree(entry);
 211 }
 212
 213 static void qeth_free_buffer_pool(struct qeth_card *card)
 214 {
 215         struct qeth_buffer_pool_entry *entry, *tmp;
 216
 217         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 218                                  init_list) {
 219                 list_del(&entry->init_list);
 220                 qeth_free_pool_entry(entry);
 221         }
 222 }
 223
 224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 225 {
 226         struct qeth_buffer_pool_entry *entry;
 227         unsigned int i;
 228
 229         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 230         if (!entry)
 231                 return NULL;
 232
 233         for (i = 0; i < pages; i++) {
 234                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 235
 236                 if (!entry->elements[i]) {
 237                         qeth_free_pool_entry(entry);
 238                         return NULL;
 239                 }
 240         }
 241
 242         return entry;
 243 }
 244
 245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 246 {
 247         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 248         unsigned int i;
 249
 250         QETH_CARD_TEXT(card, 5, "alocpool");
 251         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 252                 struct qeth_buffer_pool_entry *entry;
 253
 254                 entry = qeth_alloc_pool_entry(buf_elements);
 255                 if (!entry) {
 256                         qeth_free_buffer_pool(card);
 257                         return -ENOMEM;
 258                 }
 259
 260                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 261         }
 262         return 0;
 263 }
 264
 265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 266 {
 267         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 268         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 269         struct qeth_buffer_pool_entry *entry, *tmp;
 270         int delta = count - pool->buf_count;
 271         LIST_HEAD(entries);
 272
 273         QETH_CARD_TEXT(card, 2, "realcbp");
 274
 275         /* Defer until pool is allocated: */
 276         if (list_empty(&pool->entry_list))
 277                 goto out;
 278
 279         /* Remove entries from the pool: */
 280         while (delta < 0) {
 281                 entry = list_first_entry(&pool->entry_list,
 282                                          struct qeth_buffer_pool_entry,
 283                                          init_list);
 284                 list_del(&entry->init_list);
 285                 qeth_free_pool_entry(entry);
 286
 287                 delta++;
 288         }
 289
 290         /* Allocate additional entries: */
 291         while (delta > 0) {
 292                 entry = qeth_alloc_pool_entry(buf_elements);
 293                 if (!entry) {
 294                         list_for_each_entry_safe(entry, tmp, &entries,
 295                                                  init_list) {
 296                                 list_del(&entry->init_list);
 297                                 qeth_free_pool_entry(entry);
 298                         }
 299
 300                         return -ENOMEM;
 301                 }
 302
 303                 list_add(&entry->init_list, &entries);
 304
 305                 delta--;
 306         }
 307
 308         list_splice(&entries, &pool->entry_list);
 309
 310 out:
 311         card->qdio.in_buf_pool.buf_count = count;
 312         pool->buf_count = count;
 313         return 0;
 314 }
 315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 316
 317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 318 {
 319         if (!q)
 320                 return;
 321
 322         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 323         kfree(q);
 324 }
 325
 326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 327 {
 328         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 329         int i;
 330
 331         if (!q)
 332                 return NULL;
 333
 334         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 335                 kfree(q);
 336                 return NULL;
 337         }
 338
 339         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 340                 q->bufs[i].buffer = q->qdio_bufs[i];
 341
 342         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 343         return q;
 344 }
 345
 346 static int qeth_cq_init(struct qeth_card *card)
 347 {
 348         int rc;
 349
 350         if (card->options.cq == QETH_CQ_ENABLED) {
 351                 QETH_CARD_TEXT(card, 2, "cqinit");
 352                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 353                                    QDIO_MAX_BUFFERS_PER_Q);
 354                 card->qdio.c_q->next_buf_to_init = 127;
 355                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 1, 0, 127,
 356                              NULL);
 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) __pa(data);
 430 }
 431
 432 static int __qeth_issue_next_read(struct qeth_card *card)
 433 {
 434         struct qeth_cmd_buffer *iob = card->read_cmd;
 435         struct qeth_channel *channel = iob->channel;
 436         struct ccw1 *ccw = __ccw_from_cmd(iob);
 437         int rc;
 438
 439         QETH_CARD_TEXT(card, 5, "issnxrd");
 440         if (channel->state != CH_STATE_UP)
 441                 return -EIO;
 442
 443         memset(iob->data, 0, iob->length);
 444         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 445         iob->callback = qeth_issue_next_read_cb;
 446         /* keep the cmd alive after completion: */
 447         qeth_get_cmd(iob);
 448
 449         QETH_CARD_TEXT(card, 6, "noirqpnd");
 450         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 451         if (!rc) {
 452                 channel->active_cmd = iob;
 453         } else {
 454                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 455                                  rc, CARD_DEVID(card));
 456                 qeth_unlock_channel(card, channel);
 457                 qeth_put_cmd(iob);
 458                 card->read_or_write_problem = 1;
 459                 qeth_schedule_recovery(card);
 460         }
 461         return rc;
 462 }
 463
 464 static int qeth_issue_next_read(struct qeth_card *card)
 465 {
 466         int ret;
 467
 468         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 469         ret = __qeth_issue_next_read(card);
 470         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 471
 472         return ret;
 473 }
 474
 475 static void qeth_enqueue_cmd(struct qeth_card *card,
 476                              struct qeth_cmd_buffer *iob)
 477 {
 478         spin_lock_irq(&card->lock);
 479         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 480         spin_unlock_irq(&card->lock);
 481 }
 482
 483 static void qeth_dequeue_cmd(struct qeth_card *card,
 484                              struct qeth_cmd_buffer *iob)
 485 {
 486         spin_lock_irq(&card->lock);
 487         list_del(&iob->list_entry);
 488         spin_unlock_irq(&card->lock);
 489 }
 490
 491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 492 {
 493         iob->rc = reason;
 494         complete(&iob->done);
 495 }
 496
 497 static void qeth_flush_local_addrs4(struct qeth_card *card)
 498 {
 499         struct qeth_local_addr *addr;
 500         struct hlist_node *tmp;
 501         unsigned int i;
 502
 503         spin_lock_irq(&card->local_addrs4_lock);
 504         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 505                 hash_del_rcu(&addr->hnode);
 506                 kfree_rcu(addr, rcu);
 507         }
 508         spin_unlock_irq(&card->local_addrs4_lock);
 509 }
 510
 511 static void qeth_flush_local_addrs6(struct qeth_card *card)
 512 {
 513         struct qeth_local_addr *addr;
 514         struct hlist_node *tmp;
 515         unsigned int i;
 516
 517         spin_lock_irq(&card->local_addrs6_lock);
 518         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 519                 hash_del_rcu(&addr->hnode);
 520                 kfree_rcu(addr, rcu);
 521         }
 522         spin_unlock_irq(&card->local_addrs6_lock);
 523 }
 524
 525 static void qeth_flush_local_addrs(struct qeth_card *card)
 526 {
 527         qeth_flush_local_addrs4(card);
 528         qeth_flush_local_addrs6(card);
 529 }
 530
 531 static void qeth_add_local_addrs4(struct qeth_card *card,
 532                                   struct qeth_ipacmd_local_addrs4 *cmd)
 533 {
 534         unsigned int i;
 535
 536         if (cmd->addr_length !=
 537             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 538                 dev_err_ratelimited(&card->gdev->dev,
 539                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 540                                     cmd->addr_length);
 541                 return;
 542         }
 543
 544         spin_lock(&card->local_addrs4_lock);
 545         for (i = 0; i < cmd->count; i++) {
 546                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 547                 struct qeth_local_addr *addr;
 548                 bool duplicate = false;
 549
 550                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 551                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 552                                 duplicate = true;
 553                                 break;
 554                         }
 555                 }
 556
 557                 if (duplicate)
 558                         continue;
 559
 560                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 561                 if (!addr) {
 562                         dev_err(&card->gdev->dev,
 563                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 564                                 &cmd->addrs[i].addr);
 565                         continue;
 566                 }
 567
 568                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 569                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 570         }
 571         spin_unlock(&card->local_addrs4_lock);
 572 }
 573
 574 static void qeth_add_local_addrs6(struct qeth_card *card,
 575                                   struct qeth_ipacmd_local_addrs6 *cmd)
 576 {
 577         unsigned int i;
 578
 579         if (cmd->addr_length !=
 580             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 581                 dev_err_ratelimited(&card->gdev->dev,
 582                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 583                                     cmd->addr_length);
 584                 return;
 585         }
 586
 587         spin_lock(&card->local_addrs6_lock);
 588         for (i = 0; i < cmd->count; i++) {
 589                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 590                 struct qeth_local_addr *addr;
 591                 bool duplicate = false;
 592
 593                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 594                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 595                                 duplicate = true;
 596                                 break;
 597                         }
 598                 }
 599
 600                 if (duplicate)
 601                         continue;
 602
 603                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 604                 if (!addr) {
 605                         dev_err(&card->gdev->dev,
 606                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 607                                 &cmd->addrs[i].addr);
 608                         continue;
 609                 }
 610
 611                 addr->addr = cmd->addrs[i].addr;
 612                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 613         }
 614         spin_unlock(&card->local_addrs6_lock);
 615 }
 616
 617 static void qeth_del_local_addrs4(struct qeth_card *card,
 618                                   struct qeth_ipacmd_local_addrs4 *cmd)
 619 {
 620         unsigned int i;
 621
 622         if (cmd->addr_length !=
 623             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 624                 dev_err_ratelimited(&card->gdev->dev,
 625                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 626                                     cmd->addr_length);
 627                 return;
 628         }
 629
 630         spin_lock(&card->local_addrs4_lock);
 631         for (i = 0; i < cmd->count; i++) {
 632                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 633                 unsigned int key = ipv4_addr_hash(addr->addr);
 634                 struct qeth_local_addr *tmp;
 635
 636                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 637                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 638                                 hash_del_rcu(&tmp->hnode);
 639                                 kfree_rcu(tmp, rcu);
 640                                 break;
 641                         }
 642                 }
 643         }
 644         spin_unlock(&card->local_addrs4_lock);
 645 }
 646
 647 static void qeth_del_local_addrs6(struct qeth_card *card,
 648                                   struct qeth_ipacmd_local_addrs6 *cmd)
 649 {
 650         unsigned int i;
 651
 652         if (cmd->addr_length !=
 653             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 654                 dev_err_ratelimited(&card->gdev->dev,
 655                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 656                                     cmd->addr_length);
 657                 return;
 658         }
 659
 660         spin_lock(&card->local_addrs6_lock);
 661         for (i = 0; i < cmd->count; i++) {
 662                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 663                 u32 key = ipv6_addr_hash(&addr->addr);
 664                 struct qeth_local_addr *tmp;
 665
 666                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 667                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 668                                 hash_del_rcu(&tmp->hnode);
 669                                 kfree_rcu(tmp, rcu);
 670                                 break;
 671                         }
 672                 }
 673         }
 674         spin_unlock(&card->local_addrs6_lock);
 675 }
 676
 677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 678                                       struct sk_buff *skb)
 679 {
 680         struct qeth_local_addr *tmp;
 681         bool is_local = false;
 682         unsigned int key;
 683         __be32 next_hop;
 684
 685         if (hash_empty(card->local_addrs4))
 686                 return false;
 687
 688         rcu_read_lock();
 689         next_hop = qeth_next_hop_v4_rcu(skb,
 690                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 691         key = ipv4_addr_hash(next_hop);
 692
 693         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 694                 if (tmp->addr.s6_addr32[3] == next_hop) {
 695                         is_local = true;
 696                         break;
 697                 }
 698         }
 699         rcu_read_unlock();
 700
 701         return is_local;
 702 }
 703
 704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 705                                       struct sk_buff *skb)
 706 {
 707         struct qeth_local_addr *tmp;
 708         struct in6_addr *next_hop;
 709         bool is_local = false;
 710         u32 key;
 711
 712         if (hash_empty(card->local_addrs6))
 713                 return false;
 714
 715         rcu_read_lock();
 716         next_hop = qeth_next_hop_v6_rcu(skb,
 717                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 718         key = ipv6_addr_hash(next_hop);
 719
 720         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 721                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 722                         is_local = true;
 723                         break;
 724                 }
 725         }
 726         rcu_read_unlock();
 727
 728         return is_local;
 729 }
 730
 731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 732 {
 733         struct qeth_card *card = m->private;
 734         struct qeth_local_addr *tmp;
 735         unsigned int i;
 736
 737         rcu_read_lock();
 738         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 739                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 740         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 741                 seq_printf(m, "%pI6c\n", &tmp->addr);
 742         rcu_read_unlock();
 743
 744         return 0;
 745 }
 746
 747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 748
 749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 750                 struct qeth_card *card)
 751 {
 752         const char *ipa_name;
 753         int com = cmd->hdr.command;
 754
 755         ipa_name = qeth_get_ipa_cmd_name(com);
 756
 757         if (rc)
 758                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 759                                  ipa_name, com, CARD_DEVID(card), rc,
 760                                  qeth_get_ipa_msg(rc));
 761         else
 762                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 763                                  ipa_name, com, CARD_DEVID(card));
 764 }
 765
 766 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 767                                                 struct qeth_ipa_cmd *cmd)
 768 {
 769         QETH_CARD_TEXT(card, 5, "chkipad");
 770
 771         if (IS_IPA_REPLY(cmd)) {
 772                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 773                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 774                 return cmd;
 775         }
 776
 777         /* handle unsolicited event: */
 778         switch (cmd->hdr.command) {
 779         case IPA_CMD_STOPLAN:
 780                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 781                         dev_err(&card->gdev->dev,
 782                                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
 783                                 netdev_name(card->dev));
 784                         /* Set offline, then probably fail to set online: */
 785                         qeth_schedule_recovery(card);
 786                 } else {
 787                         /* stay online for subsequent STARTLAN */
 788                         dev_warn(&card->gdev->dev,
 789                                  "The link for interface %s on CHPID 0x%X failed\n",
 790                                  netdev_name(card->dev), card->info.chpid);
 791                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 792                         netif_carrier_off(card->dev);
 793                 }
 794                 return NULL;
 795         case IPA_CMD_STARTLAN:
 796                 dev_info(&card->gdev->dev,
 797                          "The link for %s on CHPID 0x%X has been restored\n",
 798                          netdev_name(card->dev), card->info.chpid);
 799                 if (card->info.hwtrap)
 800                         card->info.hwtrap = 2;
 801                 qeth_schedule_recovery(card);
 802                 return NULL;
 803         case IPA_CMD_SETBRIDGEPORT_IQD:
 804         case IPA_CMD_SETBRIDGEPORT_OSA:
 805         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 806                 if (card->discipline->control_event_handler(card, cmd))
 807                         return cmd;
 808                 return NULL;
 809         case IPA_CMD_REGISTER_LOCAL_ADDR:
 810                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 811                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 812                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 813                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 814
 815                 QETH_CARD_TEXT(card, 3, "irla");
 816                 return NULL;
 817         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 818                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 819                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 820                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 821                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 822
 823                 QETH_CARD_TEXT(card, 3, "urla");
 824                 return NULL;
 825         default:
 826                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 827                 return cmd;
 828         }
 829 }
 830
 831 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 832 {
 833         struct qeth_cmd_buffer *iob;
 834         unsigned long flags;
 835
 836         QETH_CARD_TEXT(card, 4, "clipalst");
 837
 838         spin_lock_irqsave(&card->lock, flags);
 839         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 840                 qeth_notify_cmd(iob, -ECANCELED);
 841         spin_unlock_irqrestore(&card->lock, flags);
 842 }
 843
 844 static int qeth_check_idx_response(struct qeth_card *card,
 845         unsigned char *buffer)
 846 {
 847         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 848         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 849                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 850                                  buffer[4]);
 851                 QETH_CARD_TEXT(card, 2, "ckidxres");
 852                 QETH_CARD_TEXT(card, 2, " idxterm");
 853                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 854                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 855                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 856                         dev_err(&card->gdev->dev,
 857                                 "The device does not support the configured transport mode\n");
 858                         return -EPROTONOSUPPORT;
 859                 }
 860                 return -EIO;
 861         }
 862         return 0;
 863 }
 864
 865 static void qeth_release_buffer_cb(struct qeth_card *card,
 866                                    struct qeth_cmd_buffer *iob,
 867                                    unsigned int data_length)
 868 {
 869         qeth_put_cmd(iob);
 870 }
 871
 872 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 873 {
 874         qeth_notify_cmd(iob, rc);
 875         qeth_put_cmd(iob);
 876 }
 877
 878 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 879                                               unsigned int length,
 880                                               unsigned int ccws, long timeout)
 881 {
 882         struct qeth_cmd_buffer *iob;
 883
 884         if (length > QETH_BUFSIZE)
 885                 return NULL;
 886
 887         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 888         if (!iob)
 889                 return NULL;
 890
 891         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 892                             GFP_KERNEL | GFP_DMA);
 893         if (!iob->data) {
 894                 kfree(iob);
 895                 return NULL;
 896         }
 897
 898         init_completion(&iob->done);
 899         spin_lock_init(&iob->lock);
 900         refcount_set(&iob->ref_count, 1);
 901         iob->channel = channel;
 902         iob->timeout = timeout;
 903         iob->length = length;
 904         return iob;
 905 }
 906
 907 static void qeth_issue_next_read_cb(struct qeth_card *card,
 908                                     struct qeth_cmd_buffer *iob,
 909                                     unsigned int data_length)
 910 {
 911         struct qeth_cmd_buffer *request = NULL;
 912         struct qeth_ipa_cmd *cmd = NULL;
 913         struct qeth_reply *reply = NULL;
 914         struct qeth_cmd_buffer *tmp;
 915         unsigned long flags;
 916         int rc = 0;
 917
 918         QETH_CARD_TEXT(card, 4, "sndctlcb");
 919         rc = qeth_check_idx_response(card, iob->data);
 920         switch (rc) {
 921         case 0:
 922                 break;
 923         case -EIO:
 924                 qeth_schedule_recovery(card);
 925                 fallthrough;
 926         default:
 927                 qeth_clear_ipacmd_list(card);
 928                 goto err_idx;
 929         }
 930
 931         cmd = __ipa_reply(iob);
 932         if (cmd) {
 933                 cmd = qeth_check_ipa_data(card, cmd);
 934                 if (!cmd)
 935                         goto out;
 936         }
 937
 938         /* match against pending cmd requests */
 939         spin_lock_irqsave(&card->lock, flags);
 940         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 941                 if (tmp->match && tmp->match(tmp, iob)) {
 942                         request = tmp;
 943                         /* take the object outside the lock */
 944                         qeth_get_cmd(request);
 945                         break;
 946                 }
 947         }
 948         spin_unlock_irqrestore(&card->lock, flags);
 949
 950         if (!request)
 951                 goto out;
 952
 953         reply = &request->reply;
 954         if (!reply->callback) {
 955                 rc = 0;
 956                 goto no_callback;
 957         }
 958
 959         spin_lock_irqsave(&request->lock, flags);
 960         if (request->rc)
 961                 /* Bail out when the requestor has already left: */
 962                 rc = request->rc;
 963         else
 964                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 965                                                         (unsigned long)iob);
 966         spin_unlock_irqrestore(&request->lock, flags);
 967
 968 no_callback:
 969         if (rc <= 0)
 970                 qeth_notify_cmd(request, rc);
 971         qeth_put_cmd(request);
 972 out:
 973         memcpy(&card->seqno.pdu_hdr_ack,
 974                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 975                 QETH_SEQ_NO_LENGTH);
 976         __qeth_issue_next_read(card);
 977 err_idx:
 978         qeth_put_cmd(iob);
 979 }
 980
 981 static int qeth_set_thread_start_bit(struct qeth_card *card,
 982                 unsigned long thread)
 983 {
 984         unsigned long flags;
 985         int rc = 0;
 986
 987         spin_lock_irqsave(&card->thread_mask_lock, flags);
 988         if (!(card->thread_allowed_mask & thread))
 989                 rc = -EPERM;
 990         else if (card->thread_start_mask & thread)
 991                 rc = -EBUSY;
 992         else
 993                 card->thread_start_mask |= thread;
 994         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 995
 996         return rc;
 997 }
 998
 999 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1000                                         unsigned long thread)
1001 {
1002         unsigned long flags;
1003
1004         spin_lock_irqsave(&card->thread_mask_lock, flags);
1005         card->thread_start_mask &= ~thread;
1006         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1007         wake_up(&card->wait_q);
1008 }
1009
1010 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1011                                           unsigned long thread)
1012 {
1013         unsigned long flags;
1014
1015         spin_lock_irqsave(&card->thread_mask_lock, flags);
1016         card->thread_running_mask &= ~thread;
1017         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1018         wake_up_all(&card->wait_q);
1019 }
1020
1021 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1022 {
1023         unsigned long flags;
1024         int rc = 0;
1025
1026         spin_lock_irqsave(&card->thread_mask_lock, flags);
1027         if (card->thread_start_mask & thread) {
1028                 if ((card->thread_allowed_mask & thread) &&
1029                     !(card->thread_running_mask & thread)) {
1030                         rc = 1;
1031                         card->thread_start_mask &= ~thread;
1032                         card->thread_running_mask |= thread;
1033                 } else
1034                         rc = -EPERM;
1035         }
1036         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1037         return rc;
1038 }
1039
1040 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1041 {
1042         int rc = 0;
1043
1044         wait_event(card->wait_q,
1045                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1046         return rc;
1047 }
1048
1049 int qeth_schedule_recovery(struct qeth_card *card)
1050 {
1051         int rc;
1052
1053         QETH_CARD_TEXT(card, 2, "startrec");
1054
1055         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1056         if (!rc)
1057                 schedule_work(&card->kernel_thread_starter);
1058
1059         return rc;
1060 }
1061
1062 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1063                             struct irb *irb)
1064 {
1065         int dstat, cstat;
1066         char *sense;
1067
1068         sense = (char *) irb->ecw;
1069         cstat = irb->scsw.cmd.cstat;
1070         dstat = irb->scsw.cmd.dstat;
1071
1072         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1073                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1074                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1075                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1076                 dev_warn(&cdev->dev, "The qeth device driver "
1077                         "failed to recover an error on the device\n");
1078                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1079                                  CCW_DEVID(cdev), dstat, cstat);
1080                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1081                                 16, 1, irb, 64, 1);
1082                 return -EIO;
1083         }
1084
1085         if (dstat & DEV_STAT_UNIT_CHECK) {
1086                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1087                     SENSE_RESETTING_EVENT_FLAG) {
1088                         QETH_CARD_TEXT(card, 2, "REVIND");
1089                         return -EIO;
1090                 }
1091                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1092                     SENSE_COMMAND_REJECT_FLAG) {
1093                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1094                         return -EIO;
1095                 }
1096                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1097                         QETH_CARD_TEXT(card, 2, "AFFE");
1098                         return -EIO;
1099                 }
1100                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1101                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1102                         return 0;
1103                 }
1104                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1105                 return -EIO;
1106         }
1107         return 0;
1108 }
1109
1110 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1111                                 struct irb *irb)
1112 {
1113         if (!IS_ERR(irb))
1114                 return 0;
1115
1116         switch (PTR_ERR(irb)) {
1117         case -EIO:
1118                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1119                                  CCW_DEVID(cdev));
1120                 QETH_CARD_TEXT(card, 2, "ckirberr");
1121                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1122                 return -EIO;
1123         case -ETIMEDOUT:
1124                 dev_warn(&cdev->dev, "A hardware operation timed out"
1125                         " on the device\n");
1126                 QETH_CARD_TEXT(card, 2, "ckirberr");
1127                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1128                 return -ETIMEDOUT;
1129         default:
1130                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1131                                  PTR_ERR(irb), CCW_DEVID(cdev));
1132                 QETH_CARD_TEXT(card, 2, "ckirberr");
1133                 QETH_CARD_TEXT(card, 2, "  rc???");
1134                 return PTR_ERR(irb);
1135         }
1136 }
1137
1138 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1139                 struct irb *irb)
1140 {
1141         int rc;
1142         int cstat, dstat;
1143         struct qeth_cmd_buffer *iob = NULL;
1144         struct ccwgroup_device *gdev;
1145         struct qeth_channel *channel;
1146         struct qeth_card *card;
1147
1148         /* while we hold the ccwdev lock, this stays valid: */
1149         gdev = dev_get_drvdata(&cdev->dev);
1150         card = dev_get_drvdata(&gdev->dev);
1151
1152         QETH_CARD_TEXT(card, 5, "irq");
1153
1154         if (card->read.ccwdev == cdev) {
1155                 channel = &card->read;
1156                 QETH_CARD_TEXT(card, 5, "read");
1157         } else if (card->write.ccwdev == cdev) {
1158                 channel = &card->write;
1159                 QETH_CARD_TEXT(card, 5, "write");
1160         } else {
1161                 channel = &card->data;
1162                 QETH_CARD_TEXT(card, 5, "data");
1163         }
1164
1165         if (intparm == 0) {
1166                 QETH_CARD_TEXT(card, 5, "irqunsol");
1167         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1168                 QETH_CARD_TEXT(card, 5, "irqunexp");
1169
1170                 dev_err(&cdev->dev,
1171                         "Received IRQ with intparm %lx, expected %px\n",
1172                         intparm, channel->active_cmd);
1173                 if (channel->active_cmd)
1174                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1175         } else {
1176                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1177         }
1178
1179         qeth_unlock_channel(card, channel);
1180
1181         rc = qeth_check_irb_error(card, cdev, irb);
1182         if (rc) {
1183                 /* IO was terminated, free its resources. */
1184                 if (iob)
1185                         qeth_cancel_cmd(iob, rc);
1186                 return;
1187         }
1188
1189         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1190                 channel->state = CH_STATE_STOPPED;
1191                 wake_up(&card->wait_q);
1192         }
1193
1194         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1195                 channel->state = CH_STATE_HALTED;
1196                 wake_up(&card->wait_q);
1197         }
1198
1199         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1200                                           SCSW_FCTL_HALT_FUNC))) {
1201                 qeth_cancel_cmd(iob, -ECANCELED);
1202                 iob = NULL;
1203         }
1204
1205         cstat = irb->scsw.cmd.cstat;
1206         dstat = irb->scsw.cmd.dstat;
1207
1208         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1209             (dstat & DEV_STAT_UNIT_CHECK) ||
1210             (cstat)) {
1211                 if (irb->esw.esw0.erw.cons) {
1212                         dev_warn(&channel->ccwdev->dev,
1213                                 "The qeth device driver failed to recover "
1214                                 "an error on the device\n");
1215                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1216                                          CCW_DEVID(channel->ccwdev), cstat,
1217                                          dstat);
1218                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1219                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1220                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1221                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1222                 }
1223
1224                 rc = qeth_get_problem(card, cdev, irb);
1225                 if (rc) {
1226                         card->read_or_write_problem = 1;
1227                         if (iob)
1228                                 qeth_cancel_cmd(iob, rc);
1229                         qeth_clear_ipacmd_list(card);
1230                         qeth_schedule_recovery(card);
1231                         return;
1232                 }
1233         }
1234
1235         if (iob) {
1236                 /* sanity check: */
1237                 if (irb->scsw.cmd.count > iob->length) {
1238                         qeth_cancel_cmd(iob, -EIO);
1239                         return;
1240                 }
1241                 if (iob->callback)
1242                         iob->callback(card, iob,
1243                                       iob->length - irb->scsw.cmd.count);
1244         }
1245 }
1246
1247 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1248                 struct qeth_qdio_out_buffer *buf,
1249                 enum iucv_tx_notify notification)
1250 {
1251         struct sk_buff *skb;
1252
1253         skb_queue_walk(&buf->skb_list, skb) {
1254                 struct sock *sk = skb->sk;
1255
1256                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1257                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1258                 if (sk && sk->sk_family == PF_IUCV)
1259                         iucv_sk(sk)->sk_txnotify(sk, notification);
1260         }
1261 }
1262
1263 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1264                                  struct qeth_qdio_out_buffer *buf, bool error,
1265                                  int budget)
1266 {
1267         struct sk_buff *skb;
1268
1269         /* Empty buffer? */
1270         if (buf->next_element_to_fill == 0)
1271                 return;
1272
1273         QETH_TXQ_STAT_INC(queue, bufs);
1274         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1275         if (error) {
1276                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1277         } else {
1278                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1279                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1280         }
1281
1282         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1283                 unsigned int bytes = qdisc_pkt_len(skb);
1284                 bool is_tso = skb_is_gso(skb);
1285                 unsigned int packets;
1286
1287                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1288                 if (!error) {
1289                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1290                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1291                         if (skb_is_nonlinear(skb))
1292                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1293                         if (is_tso) {
1294                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1295                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1296                         }
1297                 }
1298
1299                 napi_consume_skb(skb, budget);
1300         }
1301 }
1302
1303 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1304                                      struct qeth_qdio_out_buffer *buf,
1305                                      bool error, int budget)
1306 {
1307         int i;
1308
1309         /* is PCI flag set on buffer? */
1310         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1311                 atomic_dec(&queue->set_pci_flags_count);
1312                 QETH_TXQ_STAT_INC(queue, completion_irq);
1313         }
1314
1315         qeth_tx_complete_buf(queue, buf, error, budget);
1316
1317         for (i = 0; i < queue->max_elements; ++i) {
1318                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1319
1320                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1321                         kmem_cache_free(qeth_core_header_cache, data);
1322         }
1323
1324         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1325         buf->next_element_to_fill = 0;
1326         buf->frames = 0;
1327         buf->bytes = 0;
1328         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1329 }
1330
1331 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1332 {
1333         if (buf->aob)
1334                 kmem_cache_free(qeth_qaob_cache, buf->aob);
1335         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1336 }
1337
1338 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1339                                           struct qeth_qdio_out_q *queue,
1340                                           bool drain, int budget)
1341 {
1342         struct qeth_qdio_out_buffer *buf, *tmp;
1343
1344         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1345                 struct qeth_qaob_priv1 *priv;
1346                 struct qaob *aob = buf->aob;
1347                 enum iucv_tx_notify notify;
1348                 unsigned int i;
1349
1350                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1351                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1352                         QETH_CARD_TEXT(card, 5, "fp");
1353                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1354
1355                         notify = drain ? TX_NOTIFY_GENERALERROR :
1356                                          qeth_compute_cq_notification(aob->aorc, 1);
1357                         qeth_notify_skbs(queue, buf, notify);
1358                         qeth_tx_complete_buf(queue, buf, drain, budget);
1359
1360                         for (i = 0;
1361                              i < aob->sb_count && i < queue->max_elements;
1362                              i++) {
1363                                 void *data = phys_to_virt(aob->sba[i]);
1364
1365                                 if (test_bit(i, buf->from_kmem_cache) && data)
1366                                         kmem_cache_free(qeth_core_header_cache,
1367                                                         data);
1368                         }
1369
1370                         list_del(&buf->list_entry);
1371                         qeth_free_out_buf(buf);
1372                 }
1373         }
1374 }
1375
1376 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1377 {
1378         int j;
1379
1380         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1381
1382         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1383                 if (!q->bufs[j])
1384                         continue;
1385
1386                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1387                 if (free) {
1388                         qeth_free_out_buf(q->bufs[j]);
1389                         q->bufs[j] = NULL;
1390                 }
1391         }
1392 }
1393
1394 static void qeth_drain_output_queues(struct qeth_card *card)
1395 {
1396         int i;
1397
1398         QETH_CARD_TEXT(card, 2, "clearqdbf");
1399         /* clear outbound buffers to free skbs */
1400         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1401                 if (card->qdio.out_qs[i])
1402                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1403         }
1404 }
1405
1406 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1407 {
1408         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1409
1410         if (card->qdio.no_out_queues == max)
1411                 return;
1412
1413         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1414                 qeth_free_qdio_queues(card);
1415
1416         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1417                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1418
1419         card->qdio.no_out_queues = max;
1420 }
1421
1422 static int qeth_update_from_chp_desc(struct qeth_card *card)
1423 {
1424         struct ccw_device *ccwdev;
1425         struct channel_path_desc_fmt0 *chp_dsc;
1426
1427         QETH_CARD_TEXT(card, 2, "chp_desc");
1428
1429         ccwdev = card->data.ccwdev;
1430         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1431         if (!chp_dsc)
1432                 return -ENOMEM;
1433
1434         card->info.func_level = 0x4100 + chp_dsc->desc;
1435
1436         if (IS_OSD(card) || IS_OSX(card))
1437                 /* CHPP field bit 6 == 1 -> single queue */
1438                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1439
1440         kfree(chp_dsc);
1441         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1442         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1443         return 0;
1444 }
1445
1446 static void qeth_init_qdio_info(struct qeth_card *card)
1447 {
1448         QETH_CARD_TEXT(card, 4, "intqdinf");
1449         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1450         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1451         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1452
1453         /* inbound */
1454         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1455         if (IS_IQD(card))
1456                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1457         else
1458                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1459         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1460         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1461         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1462 }
1463
1464 static void qeth_set_initial_options(struct qeth_card *card)
1465 {
1466         card->options.route4.type = NO_ROUTER;
1467         card->options.route6.type = NO_ROUTER;
1468         card->options.isolation = ISOLATION_MODE_NONE;
1469         card->options.cq = QETH_CQ_DISABLED;
1470         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1471 }
1472
1473 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1474 {
1475         unsigned long flags;
1476         int rc = 0;
1477
1478         spin_lock_irqsave(&card->thread_mask_lock, flags);
1479         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1480                         (u8) card->thread_start_mask,
1481                         (u8) card->thread_allowed_mask,
1482                         (u8) card->thread_running_mask);
1483         rc = (card->thread_start_mask & thread);
1484         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1485         return rc;
1486 }
1487
1488 static int qeth_do_reset(void *data);
1489 static void qeth_start_kernel_thread(struct work_struct *work)
1490 {
1491         struct task_struct *ts;
1492         struct qeth_card *card = container_of(work, struct qeth_card,
1493                                         kernel_thread_starter);
1494         QETH_CARD_TEXT(card, 2, "strthrd");
1495
1496         if (card->read.state != CH_STATE_UP &&
1497             card->write.state != CH_STATE_UP)
1498                 return;
1499         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1500                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1501                 if (IS_ERR(ts)) {
1502                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1503                         qeth_clear_thread_running_bit(card,
1504                                 QETH_RECOVER_THREAD);
1505                 }
1506         }
1507 }
1508
1509 static void qeth_buffer_reclaim_work(struct work_struct *);
1510 static void qeth_setup_card(struct qeth_card *card)
1511 {
1512         QETH_CARD_TEXT(card, 2, "setupcrd");
1513
1514         card->info.type = CARD_RDEV(card)->id.driver_info;
1515         card->state = CARD_STATE_DOWN;
1516         spin_lock_init(&card->lock);
1517         spin_lock_init(&card->thread_mask_lock);
1518         mutex_init(&card->conf_mutex);
1519         mutex_init(&card->discipline_mutex);
1520         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1521         INIT_LIST_HEAD(&card->cmd_waiter_list);
1522         init_waitqueue_head(&card->wait_q);
1523         qeth_set_initial_options(card);
1524         /* IP address takeover */
1525         INIT_LIST_HEAD(&card->ipato.entries);
1526         qeth_init_qdio_info(card);
1527         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1528         hash_init(card->rx_mode_addrs);
1529         hash_init(card->local_addrs4);
1530         hash_init(card->local_addrs6);
1531         spin_lock_init(&card->local_addrs4_lock);
1532         spin_lock_init(&card->local_addrs6_lock);
1533 }
1534
1535 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1536 {
1537         struct qeth_card *card = container_of(slr, struct qeth_card,
1538                                         qeth_service_level);
1539         if (card->info.mcl_level[0])
1540                 seq_printf(m, "qeth: %s firmware level %s\n",
1541                         CARD_BUS_ID(card), card->info.mcl_level);
1542 }
1543
1544 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1545 {
1546         struct qeth_card *card;
1547
1548         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1549         card = kzalloc(sizeof(*card), GFP_KERNEL);
1550         if (!card)
1551                 goto out;
1552         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1553
1554         card->gdev = gdev;
1555         dev_set_drvdata(&gdev->dev, card);
1556         CARD_RDEV(card) = gdev->cdev[0];
1557         CARD_WDEV(card) = gdev->cdev[1];
1558         CARD_DDEV(card) = gdev->cdev[2];
1559
1560         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1561                                                  dev_name(&gdev->dev));
1562         if (!card->event_wq)
1563                 goto out_wq;
1564
1565         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1566         if (!card->read_cmd)
1567                 goto out_read_cmd;
1568
1569         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1570                                            qeth_debugfs_root);
1571         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1572                             &qeth_debugfs_local_addr_fops);
1573
1574         card->qeth_service_level.seq_print = qeth_core_sl_print;
1575         register_service_level(&card->qeth_service_level);
1576         return card;
1577
1578 out_read_cmd:
1579         destroy_workqueue(card->event_wq);
1580 out_wq:
1581         dev_set_drvdata(&gdev->dev, NULL);
1582         kfree(card);
1583 out:
1584         return NULL;
1585 }
1586
1587 static int qeth_clear_channel(struct qeth_card *card,
1588                               struct qeth_channel *channel)
1589 {
1590         int rc;
1591
1592         QETH_CARD_TEXT(card, 3, "clearch");
1593         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1594         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1595         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1596
1597         if (rc)
1598                 return rc;
1599         rc = wait_event_interruptible_timeout(card->wait_q,
1600                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1601         if (rc == -ERESTARTSYS)
1602                 return rc;
1603         if (channel->state != CH_STATE_STOPPED)
1604                 return -ETIME;
1605         channel->state = CH_STATE_DOWN;
1606         return 0;
1607 }
1608
1609 static int qeth_halt_channel(struct qeth_card *card,
1610                              struct qeth_channel *channel)
1611 {
1612         int rc;
1613
1614         QETH_CARD_TEXT(card, 3, "haltch");
1615         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1616         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1617         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1618
1619         if (rc)
1620                 return rc;
1621         rc = wait_event_interruptible_timeout(card->wait_q,
1622                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1623         if (rc == -ERESTARTSYS)
1624                 return rc;
1625         if (channel->state != CH_STATE_HALTED)
1626                 return -ETIME;
1627         return 0;
1628 }
1629
1630 static int qeth_stop_channel(struct qeth_channel *channel)
1631 {
1632         struct ccw_device *cdev = channel->ccwdev;
1633         int rc;
1634
1635         rc = ccw_device_set_offline(cdev);
1636
1637         spin_lock_irq(get_ccwdev_lock(cdev));
1638         if (channel->active_cmd)
1639                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1640                         channel->active_cmd);
1641
1642         cdev->handler = NULL;
1643         spin_unlock_irq(get_ccwdev_lock(cdev));
1644
1645         return rc;
1646 }
1647
1648 static int qeth_start_channel(struct qeth_channel *channel)
1649 {
1650         struct ccw_device *cdev = channel->ccwdev;
1651         int rc;
1652
1653         channel->state = CH_STATE_DOWN;
1654         xchg(&channel->active_cmd, NULL);
1655
1656         spin_lock_irq(get_ccwdev_lock(cdev));
1657         cdev->handler = qeth_irq;
1658         spin_unlock_irq(get_ccwdev_lock(cdev));
1659
1660         rc = ccw_device_set_online(cdev);
1661         if (rc)
1662                 goto err;
1663
1664         return 0;
1665
1666 err:
1667         spin_lock_irq(get_ccwdev_lock(cdev));
1668         cdev->handler = NULL;
1669         spin_unlock_irq(get_ccwdev_lock(cdev));
1670         return rc;
1671 }
1672
1673 static int qeth_halt_channels(struct qeth_card *card)
1674 {
1675         int rc1 = 0, rc2 = 0, rc3 = 0;
1676
1677         QETH_CARD_TEXT(card, 3, "haltchs");
1678         rc1 = qeth_halt_channel(card, &card->read);
1679         rc2 = qeth_halt_channel(card, &card->write);
1680         rc3 = qeth_halt_channel(card, &card->data);
1681         if (rc1)
1682                 return rc1;
1683         if (rc2)
1684                 return rc2;
1685         return rc3;
1686 }
1687
1688 static int qeth_clear_channels(struct qeth_card *card)
1689 {
1690         int rc1 = 0, rc2 = 0, rc3 = 0;
1691
1692         QETH_CARD_TEXT(card, 3, "clearchs");
1693         rc1 = qeth_clear_channel(card, &card->read);
1694         rc2 = qeth_clear_channel(card, &card->write);
1695         rc3 = qeth_clear_channel(card, &card->data);
1696         if (rc1)
1697                 return rc1;
1698         if (rc2)
1699                 return rc2;
1700         return rc3;
1701 }
1702
1703 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1704 {
1705         int rc = 0;
1706
1707         QETH_CARD_TEXT(card, 3, "clhacrd");
1708
1709         if (halt)
1710                 rc = qeth_halt_channels(card);
1711         if (rc)
1712                 return rc;
1713         return qeth_clear_channels(card);
1714 }
1715
1716 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1717 {
1718         int rc = 0;
1719
1720         QETH_CARD_TEXT(card, 3, "qdioclr");
1721         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1722                 QETH_QDIO_CLEANING)) {
1723         case QETH_QDIO_ESTABLISHED:
1724                 if (IS_IQD(card))
1725                         rc = qdio_shutdown(CARD_DDEV(card),
1726                                 QDIO_FLAG_CLEANUP_USING_HALT);
1727                 else
1728                         rc = qdio_shutdown(CARD_DDEV(card),
1729                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1730                 if (rc)
1731                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1732                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1733                 break;
1734         case QETH_QDIO_CLEANING:
1735                 return rc;
1736         default:
1737                 break;
1738         }
1739         rc = qeth_clear_halt_card(card, use_halt);
1740         if (rc)
1741                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1742         return rc;
1743 }
1744
1745 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1746 {
1747         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1748         struct diag26c_vnic_resp *response = NULL;
1749         struct diag26c_vnic_req *request = NULL;
1750         struct ccw_dev_id id;
1751         char userid[80];
1752         int rc = 0;
1753
1754         QETH_CARD_TEXT(card, 2, "vmlayer");
1755
1756         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1757         if (rc)
1758                 goto out;
1759
1760         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1761         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1762         if (!request || !response) {
1763                 rc = -ENOMEM;
1764                 goto out;
1765         }
1766
1767         ccw_device_get_id(CARD_RDEV(card), &id);
1768         request->resp_buf_len = sizeof(*response);
1769         request->resp_version = DIAG26C_VERSION6_VM65918;
1770         request->req_format = DIAG26C_VNIC_INFO;
1771         ASCEBC(userid, 8);
1772         memcpy(&request->sys_name, userid, 8);
1773         request->devno = id.devno;
1774
1775         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1776         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1777         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1778         if (rc)
1779                 goto out;
1780         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1781
1782         if (request->resp_buf_len < sizeof(*response) ||
1783             response->version != request->resp_version) {
1784                 rc = -EIO;
1785                 goto out;
1786         }
1787
1788         if (response->protocol == VNIC_INFO_PROT_L2)
1789                 disc = QETH_DISCIPLINE_LAYER2;
1790         else if (response->protocol == VNIC_INFO_PROT_L3)
1791                 disc = QETH_DISCIPLINE_LAYER3;
1792
1793 out:
1794         kfree(response);
1795         kfree(request);
1796         if (rc)
1797                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1798         return disc;
1799 }
1800
1801 /* Determine whether the device requires a specific layer discipline */
1802 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1803 {
1804         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1805
1806         if (IS_OSM(card))
1807                 disc = QETH_DISCIPLINE_LAYER2;
1808         else if (IS_VM_NIC(card))
1809                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1810                                       qeth_vm_detect_layer(card);
1811
1812         switch (disc) {
1813         case QETH_DISCIPLINE_LAYER2:
1814                 QETH_CARD_TEXT(card, 3, "force l2");
1815                 break;
1816         case QETH_DISCIPLINE_LAYER3:
1817                 QETH_CARD_TEXT(card, 3, "force l3");
1818                 break;
1819         default:
1820                 QETH_CARD_TEXT(card, 3, "force no");
1821         }
1822
1823         return disc;
1824 }
1825
1826 static void qeth_set_blkt_defaults(struct qeth_card *card)
1827 {
1828         QETH_CARD_TEXT(card, 2, "cfgblkt");
1829
1830         if (card->info.use_v1_blkt) {
1831                 card->info.blkt.time_total = 0;
1832                 card->info.blkt.inter_packet = 0;
1833                 card->info.blkt.inter_packet_jumbo = 0;
1834         } else {
1835                 card->info.blkt.time_total = 250;
1836                 card->info.blkt.inter_packet = 5;
1837                 card->info.blkt.inter_packet_jumbo = 15;
1838         }
1839 }
1840
1841 static void qeth_idx_init(struct qeth_card *card)
1842 {
1843         memset(&card->seqno, 0, sizeof(card->seqno));
1844
1845         card->token.issuer_rm_w = 0x00010103UL;
1846         card->token.cm_filter_w = 0x00010108UL;
1847         card->token.cm_connection_w = 0x0001010aUL;
1848         card->token.ulp_filter_w = 0x0001010bUL;
1849         card->token.ulp_connection_w = 0x0001010dUL;
1850
1851         switch (card->info.type) {
1852         case QETH_CARD_TYPE_IQD:
1853                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1854                 break;
1855         case QETH_CARD_TYPE_OSD:
1856                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1857                 break;
1858         default:
1859                 break;
1860         }
1861 }
1862
1863 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1864                                   struct qeth_cmd_buffer *iob)
1865 {
1866         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1867                QETH_SEQ_NO_LENGTH);
1868         if (iob->channel == &card->write)
1869                 card->seqno.trans_hdr++;
1870 }
1871
1872 static int qeth_peer_func_level(int level)
1873 {
1874         if ((level & 0xff) == 8)
1875                 return (level & 0xff) + 0x400;
1876         if (((level >> 8) & 3) == 1)
1877                 return (level & 0xff) + 0x200;
1878         return level;
1879 }
1880
1881 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1882                                   struct qeth_cmd_buffer *iob)
1883 {
1884         qeth_idx_finalize_cmd(card, iob);
1885
1886         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1887                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1888         card->seqno.pdu_hdr++;
1889         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1890                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1891
1892         iob->callback = qeth_release_buffer_cb;
1893 }
1894
1895 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1896                                  struct qeth_cmd_buffer *reply)
1897 {
1898         /* MPC cmds are issued strictly in sequence. */
1899         return !IS_IPA(reply->data);
1900 }
1901
1902 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1903                                                   const void *data,
1904                                                   unsigned int data_length)
1905 {
1906         struct qeth_cmd_buffer *iob;
1907
1908         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1909         if (!iob)
1910                 return NULL;
1911
1912         memcpy(iob->data, data, data_length);
1913         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1914                        iob->data);
1915         iob->finalize = qeth_mpc_finalize_cmd;
1916         iob->match = qeth_mpc_match_reply;
1917         return iob;
1918 }
1919
1920 /**
1921  * qeth_send_control_data() -   send control command to the card
1922  * @card:                       qeth_card structure pointer
1923  * @iob:                        qeth_cmd_buffer pointer
1924  * @reply_cb:                   callback function pointer
1925  *  cb_card:                    pointer to the qeth_card structure
1926  *  cb_reply:                   pointer to the qeth_reply structure
1927  *  cb_cmd:                     pointer to the original iob for non-IPA
1928  *                              commands, or to the qeth_ipa_cmd structure
1929  *                              for the IPA commands.
1930  * @reply_param:                private pointer passed to the callback
1931  *
1932  * Callback function gets called one or more times, with cb_cmd
1933  * pointing to the response returned by the hardware. Callback
1934  * function must return
1935  *   > 0 if more reply blocks are expected,
1936  *     0 if the last or only reply block is received, and
1937  *   < 0 on error.
1938  * Callback function can get the value of the reply_param pointer from the
1939  * field 'param' of the structure qeth_reply.
1940  */
1941
1942 static int qeth_send_control_data(struct qeth_card *card,
1943                                   struct qeth_cmd_buffer *iob,
1944                                   int (*reply_cb)(struct qeth_card *cb_card,
1945                                                   struct qeth_reply *cb_reply,
1946                                                   unsigned long cb_cmd),
1947                                   void *reply_param)
1948 {
1949         struct qeth_channel *channel = iob->channel;
1950         struct qeth_reply *reply = &iob->reply;
1951         long timeout = iob->timeout;
1952         int rc;
1953
1954         QETH_CARD_TEXT(card, 2, "sendctl");
1955
1956         reply->callback = reply_cb;
1957         reply->param = reply_param;
1958
1959         timeout = wait_event_interruptible_timeout(card->wait_q,
1960                                                    qeth_trylock_channel(channel, iob),
1961                                                    timeout);
1962         if (timeout <= 0) {
1963                 qeth_put_cmd(iob);
1964                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1965         }
1966
1967         if (iob->finalize)
1968                 iob->finalize(card, iob);
1969         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1970
1971         qeth_enqueue_cmd(card, iob);
1972
1973         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1974         qeth_get_cmd(iob);
1975
1976         QETH_CARD_TEXT(card, 6, "noirqpnd");
1977         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1978         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1979                                       (addr_t) iob, 0, 0, timeout);
1980         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1981         if (rc) {
1982                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1983                                  CARD_DEVID(card), rc);
1984                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1985                 qeth_dequeue_cmd(card, iob);
1986                 qeth_put_cmd(iob);
1987                 qeth_unlock_channel(card, channel);
1988                 goto out;
1989         }
1990
1991         timeout = wait_for_completion_interruptible_timeout(&iob->done,
1992                                                             timeout);
1993         if (timeout <= 0)
1994                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1995
1996         qeth_dequeue_cmd(card, iob);
1997
1998         if (reply_cb) {
1999                 /* Wait until the callback for a late reply has completed: */
2000                 spin_lock_irq(&iob->lock);
2001                 if (rc)
2002                         /* Zap any callback that's still pending: */
2003                         iob->rc = rc;
2004                 spin_unlock_irq(&iob->lock);
2005         }
2006
2007         if (!rc)
2008                 rc = iob->rc;
2009
2010 out:
2011         qeth_put_cmd(iob);
2012         return rc;
2013 }
2014
2015 struct qeth_node_desc {
2016         struct node_descriptor nd1;
2017         struct node_descriptor nd2;
2018         struct node_descriptor nd3;
2019 };
2020
2021 static void qeth_read_conf_data_cb(struct qeth_card *card,
2022                                    struct qeth_cmd_buffer *iob,
2023                                    unsigned int data_length)
2024 {
2025         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2026         int rc = 0;
2027         u8 *tag;
2028
2029         QETH_CARD_TEXT(card, 2, "cfgunit");
2030
2031         if (data_length < sizeof(*nd)) {
2032                 rc = -EINVAL;
2033                 goto out;
2034         }
2035
2036         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2037                                nd->nd1.plant[1] == _ascebc['M'];
2038         tag = (u8 *)&nd->nd1.tag;
2039         card->info.chpid = tag[0];
2040         card->info.unit_addr2 = tag[1];
2041
2042         tag = (u8 *)&nd->nd2.tag;
2043         card->info.cula = tag[1];
2044
2045         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2046                                  nd->nd3.model[1] == 0xF0 &&
2047                                  nd->nd3.model[2] >= 0xF1 &&
2048                                  nd->nd3.model[2] <= 0xF4;
2049
2050 out:
2051         qeth_notify_cmd(iob, rc);
2052         qeth_put_cmd(iob);
2053 }
2054
2055 static int qeth_read_conf_data(struct qeth_card *card)
2056 {
2057         struct qeth_channel *channel = &card->data;
2058         struct qeth_cmd_buffer *iob;
2059         struct ciw *ciw;
2060
2061         /* scan for RCD command in extended SenseID data */
2062         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2063         if (!ciw || ciw->cmd == 0)
2064                 return -EOPNOTSUPP;
2065         if (ciw->count < sizeof(struct qeth_node_desc))
2066                 return -EINVAL;
2067
2068         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2069         if (!iob)
2070                 return -ENOMEM;
2071
2072         iob->callback = qeth_read_conf_data_cb;
2073         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2074                        iob->data);
2075
2076         return qeth_send_control_data(card, iob, NULL, NULL);
2077 }
2078
2079 static int qeth_idx_check_activate_response(struct qeth_card *card,
2080                                             struct qeth_channel *channel,
2081                                             struct qeth_cmd_buffer *iob)
2082 {
2083         int rc;
2084
2085         rc = qeth_check_idx_response(card, iob->data);
2086         if (rc)
2087                 return rc;
2088
2089         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2090                 return 0;
2091
2092         /* negative reply: */
2093         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2094                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2095
2096         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2097         case QETH_IDX_ACT_ERR_EXCL:
2098                 dev_err(&channel->ccwdev->dev,
2099                         "The adapter is used exclusively by another host\n");
2100                 return -EBUSY;
2101         case QETH_IDX_ACT_ERR_AUTH:
2102         case QETH_IDX_ACT_ERR_AUTH_USER:
2103                 dev_err(&channel->ccwdev->dev,
2104                         "Setting the device online failed because of insufficient authorization\n");
2105                 return -EPERM;
2106         default:
2107                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2108                                  CCW_DEVID(channel->ccwdev));
2109                 return -EIO;
2110         }
2111 }
2112
2113 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2114                                               struct qeth_cmd_buffer *iob,
2115                                               unsigned int data_length)
2116 {
2117         struct qeth_channel *channel = iob->channel;
2118         u16 peer_level;
2119         int rc;
2120
2121         QETH_CARD_TEXT(card, 2, "idxrdcb");
2122
2123         rc = qeth_idx_check_activate_response(card, channel, iob);
2124         if (rc)
2125                 goto out;
2126
2127         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2128         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2129                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2130                                  CCW_DEVID(channel->ccwdev),
2131                                  card->info.func_level, peer_level);
2132                 rc = -EINVAL;
2133                 goto out;
2134         }
2135
2136         memcpy(&card->token.issuer_rm_r,
2137                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2138                QETH_MPC_TOKEN_LENGTH);
2139         memcpy(&card->info.mcl_level[0],
2140                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2141
2142 out:
2143         qeth_notify_cmd(iob, rc);
2144         qeth_put_cmd(iob);
2145 }
2146
2147 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2148                                                struct qeth_cmd_buffer *iob,
2149                                                unsigned int data_length)
2150 {
2151         struct qeth_channel *channel = iob->channel;
2152         u16 peer_level;
2153         int rc;
2154
2155         QETH_CARD_TEXT(card, 2, "idxwrcb");
2156
2157         rc = qeth_idx_check_activate_response(card, channel, iob);
2158         if (rc)
2159                 goto out;
2160
2161         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2162         if ((peer_level & ~0x0100) !=
2163             qeth_peer_func_level(card->info.func_level)) {
2164                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2165                                  CCW_DEVID(channel->ccwdev),
2166                                  card->info.func_level, peer_level);
2167                 rc = -EINVAL;
2168         }
2169
2170 out:
2171         qeth_notify_cmd(iob, rc);
2172         qeth_put_cmd(iob);
2173 }
2174
2175 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2176                                         struct qeth_cmd_buffer *iob)
2177 {
2178         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2179         u8 port = ((u8)card->dev->dev_port) | 0x80;
2180         struct ccw1 *ccw = __ccw_from_cmd(iob);
2181
2182         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2183                        iob->data);
2184         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2185         iob->finalize = qeth_idx_finalize_cmd;
2186
2187         port |= QETH_IDX_ACT_INVAL_FRAME;
2188         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2189         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2190                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2191         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2192                &card->info.func_level, 2);
2193         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2194         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2195 }
2196
2197 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2198 {
2199         struct qeth_channel *channel = &card->read;
2200         struct qeth_cmd_buffer *iob;
2201         int rc;
2202
2203         QETH_CARD_TEXT(card, 2, "idxread");
2204
2205         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2206         if (!iob)
2207                 return -ENOMEM;
2208
2209         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2210         qeth_idx_setup_activate_cmd(card, iob);
2211         iob->callback = qeth_idx_activate_read_channel_cb;
2212
2213         rc = qeth_send_control_data(card, iob, NULL, NULL);
2214         if (rc)
2215                 return rc;
2216
2217         channel->state = CH_STATE_UP;
2218         return 0;
2219 }
2220
2221 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2222 {
2223         struct qeth_channel *channel = &card->write;
2224         struct qeth_cmd_buffer *iob;
2225         int rc;
2226
2227         QETH_CARD_TEXT(card, 2, "idxwrite");
2228
2229         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2230         if (!iob)
2231                 return -ENOMEM;
2232
2233         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2234         qeth_idx_setup_activate_cmd(card, iob);
2235         iob->callback = qeth_idx_activate_write_channel_cb;
2236
2237         rc = qeth_send_control_data(card, iob, NULL, NULL);
2238         if (rc)
2239                 return rc;
2240
2241         channel->state = CH_STATE_UP;
2242         return 0;
2243 }
2244
2245 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2246                 unsigned long data)
2247 {
2248         struct qeth_cmd_buffer *iob;
2249
2250         QETH_CARD_TEXT(card, 2, "cmenblcb");
2251
2252         iob = (struct qeth_cmd_buffer *) data;
2253         memcpy(&card->token.cm_filter_r,
2254                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2255                QETH_MPC_TOKEN_LENGTH);
2256         return 0;
2257 }
2258
2259 static int qeth_cm_enable(struct qeth_card *card)
2260 {
2261         struct qeth_cmd_buffer *iob;
2262
2263         QETH_CARD_TEXT(card, 2, "cmenable");
2264
2265         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2266         if (!iob)
2267                 return -ENOMEM;
2268
2269         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2270                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2271         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2272                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2273
2274         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2275 }
2276
2277 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2278                 unsigned long data)
2279 {
2280         struct qeth_cmd_buffer *iob;
2281
2282         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2283
2284         iob = (struct qeth_cmd_buffer *) data;
2285         memcpy(&card->token.cm_connection_r,
2286                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2287                QETH_MPC_TOKEN_LENGTH);
2288         return 0;
2289 }
2290
2291 static int qeth_cm_setup(struct qeth_card *card)
2292 {
2293         struct qeth_cmd_buffer *iob;
2294
2295         QETH_CARD_TEXT(card, 2, "cmsetup");
2296
2297         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2298         if (!iob)
2299                 return -ENOMEM;
2300
2301         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2302                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2303         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2304                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2305         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2306                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2307         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2308 }
2309
2310 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2311 {
2312         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2313             link_type == QETH_LINK_TYPE_HSTR) {
2314                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2315                 return false;
2316         }
2317
2318         return true;
2319 }
2320
2321 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2322 {
2323         struct net_device *dev = card->dev;
2324         unsigned int new_mtu;
2325
2326         if (!max_mtu) {
2327                 /* IQD needs accurate max MTU to set up its RX buffers: */
2328                 if (IS_IQD(card))
2329                         return -EINVAL;
2330                 /* tolerate quirky HW: */
2331                 max_mtu = ETH_MAX_MTU;
2332         }
2333
2334         rtnl_lock();
2335         if (IS_IQD(card)) {
2336                 /* move any device with default MTU to new max MTU: */
2337                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2338
2339                 /* adjust RX buffer size to new max MTU: */
2340                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2341                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2342                         qeth_free_qdio_queues(card);
2343         } else {
2344                 if (dev->mtu)
2345                         new_mtu = dev->mtu;
2346                 /* default MTUs for first setup: */
2347                 else if (IS_LAYER2(card))
2348                         new_mtu = ETH_DATA_LEN;
2349                 else
2350                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2351         }
2352
2353         dev->max_mtu = max_mtu;
2354         dev->mtu = min(new_mtu, max_mtu);
2355         rtnl_unlock();
2356         return 0;
2357 }
2358
2359 static int qeth_get_mtu_outof_framesize(int framesize)
2360 {
2361         switch (framesize) {
2362         case 0x4000:
2363                 return 8192;
2364         case 0x6000:
2365                 return 16384;
2366         case 0xa000:
2367                 return 32768;
2368         case 0xffff:
2369                 return 57344;
2370         default:
2371                 return 0;
2372         }
2373 }
2374
2375 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2376                 unsigned long data)
2377 {
2378         __u16 mtu, framesize;
2379         __u16 len;
2380         struct qeth_cmd_buffer *iob;
2381         u8 link_type = 0;
2382
2383         QETH_CARD_TEXT(card, 2, "ulpenacb");
2384
2385         iob = (struct qeth_cmd_buffer *) data;
2386         memcpy(&card->token.ulp_filter_r,
2387                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2388                QETH_MPC_TOKEN_LENGTH);
2389         if (IS_IQD(card)) {
2390                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2391                 mtu = qeth_get_mtu_outof_framesize(framesize);
2392         } else {
2393                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2394         }
2395         *(u16 *)reply->param = mtu;
2396
2397         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2398         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2399                 memcpy(&link_type,
2400                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2401                 if (!qeth_is_supported_link_type(card, link_type))
2402                         return -EPROTONOSUPPORT;
2403         }
2404
2405         card->info.link_type = link_type;
2406         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2407         return 0;
2408 }
2409
2410 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2411 {
2412         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2413 }
2414
2415 static int qeth_ulp_enable(struct qeth_card *card)
2416 {
2417         u8 prot_type = qeth_mpc_select_prot_type(card);
2418         struct qeth_cmd_buffer *iob;
2419         u16 max_mtu;
2420         int rc;
2421
2422         QETH_CARD_TEXT(card, 2, "ulpenabl");
2423
2424         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2425         if (!iob)
2426                 return -ENOMEM;
2427
2428         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2429         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2430         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2431                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2432         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2433                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2434         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2435         if (rc)
2436                 return rc;
2437         return qeth_update_max_mtu(card, max_mtu);
2438 }
2439
2440 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2441                 unsigned long data)
2442 {
2443         struct qeth_cmd_buffer *iob;
2444
2445         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2446
2447         iob = (struct qeth_cmd_buffer *) data;
2448         memcpy(&card->token.ulp_connection_r,
2449                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2450                QETH_MPC_TOKEN_LENGTH);
2451         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2452                      3)) {
2453                 QETH_CARD_TEXT(card, 2, "olmlimit");
2454                 dev_err(&card->gdev->dev, "A connection could not be "
2455                         "established because of an OLM limit\n");
2456                 return -EMLINK;
2457         }
2458         return 0;
2459 }
2460
2461 static int qeth_ulp_setup(struct qeth_card *card)
2462 {
2463         __u16 temp;
2464         struct qeth_cmd_buffer *iob;
2465
2466         QETH_CARD_TEXT(card, 2, "ulpsetup");
2467
2468         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2469         if (!iob)
2470                 return -ENOMEM;
2471
2472         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2473                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2474         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2475                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2476         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2477                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2478
2479         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2480         temp = (card->info.cula << 8) + card->info.unit_addr2;
2481         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2482         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2483 }
2484
2485 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2486                               gfp_t gfp)
2487 {
2488         struct qeth_qdio_out_buffer *newbuf;
2489
2490         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2491         if (!newbuf)
2492                 return -ENOMEM;
2493
2494         newbuf->buffer = q->qdio_bufs[bidx];
2495         skb_queue_head_init(&newbuf->skb_list);
2496         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2497         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2498         q->bufs[bidx] = newbuf;
2499         return 0;
2500 }
2501
2502 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2503 {
2504         if (!q)
2505                 return;
2506
2507         qeth_drain_output_queue(q, true);
2508         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2509         kfree(q);
2510 }
2511
2512 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2513 {
2514         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2515         unsigned int i;
2516
2517         if (!q)
2518                 return NULL;
2519
2520         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2521                 goto err_qdio_bufs;
2522
2523         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2524                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2525                         goto err_out_bufs;
2526         }
2527
2528         return q;
2529
2530 err_out_bufs:
2531         while (i > 0)
2532                 qeth_free_out_buf(q->bufs[--i]);
2533         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2534 err_qdio_bufs:
2535         kfree(q);
2536         return NULL;
2537 }
2538
2539 static void qeth_tx_completion_timer(struct timer_list *timer)
2540 {
2541         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2542
2543         napi_schedule(&queue->napi);
2544         QETH_TXQ_STAT_INC(queue, completion_timer);
2545 }
2546
2547 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2548 {
2549         unsigned int i;
2550
2551         QETH_CARD_TEXT(card, 2, "allcqdbf");
2552
2553         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2554                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2555                 return 0;
2556
2557         /* inbound buffer pool */
2558         if (qeth_alloc_buffer_pool(card))
2559                 goto out_buffer_pool;
2560
2561         /* outbound */
2562         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2563                 struct qeth_qdio_out_q *queue;
2564
2565                 queue = qeth_alloc_output_queue();
2566                 if (!queue)
2567                         goto out_freeoutq;
2568                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2569                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2570                 card->qdio.out_qs[i] = queue;
2571                 queue->card = card;
2572                 queue->queue_no = i;
2573                 INIT_LIST_HEAD(&queue->pending_bufs);
2574                 spin_lock_init(&queue->lock);
2575                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2576                 if (IS_IQD(card)) {
2577                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2578                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2579                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2580                 } else {
2581                         queue->coalesce_usecs = USEC_PER_SEC;
2582                         queue->max_coalesced_frames = 0;
2583                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2584                 }
2585                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2586         }
2587
2588         /* completion */
2589         if (qeth_alloc_cq(card))
2590                 goto out_freeoutq;
2591
2592         return 0;
2593
2594 out_freeoutq:
2595         while (i > 0) {
2596                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2597                 card->qdio.out_qs[i] = NULL;
2598         }
2599         qeth_free_buffer_pool(card);
2600 out_buffer_pool:
2601         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2602         return -ENOMEM;
2603 }
2604
2605 static void qeth_free_qdio_queues(struct qeth_card *card)
2606 {
2607         int i, j;
2608
2609         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2610                 QETH_QDIO_UNINITIALIZED)
2611                 return;
2612
2613         qeth_free_cq(card);
2614         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2615                 if (card->qdio.in_q->bufs[j].rx_skb) {
2616                         consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2617                         card->qdio.in_q->bufs[j].rx_skb = NULL;
2618                 }
2619         }
2620
2621         /* inbound buffer pool */
2622         qeth_free_buffer_pool(card);
2623         /* free outbound qdio_qs */
2624         for (i = 0; i < card->qdio.no_out_queues; i++) {
2625                 qeth_free_output_queue(card->qdio.out_qs[i]);
2626                 card->qdio.out_qs[i] = NULL;
2627         }
2628 }
2629
2630 static void qeth_fill_qib_parms(struct qeth_card *card,
2631                                 struct qeth_qib_parms *parms)
2632 {
2633         struct qeth_qdio_out_q *queue;
2634         unsigned int i;
2635
2636         parms->pcit_magic[0] = 'P';
2637         parms->pcit_magic[1] = 'C';
2638         parms->pcit_magic[2] = 'I';
2639         parms->pcit_magic[3] = 'T';
2640         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2641         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2642         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2643         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2644
2645         parms->blkt_magic[0] = 'B';
2646         parms->blkt_magic[1] = 'L';
2647         parms->blkt_magic[2] = 'K';
2648         parms->blkt_magic[3] = 'T';
2649         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2650         parms->blkt_total = card->info.blkt.time_total;
2651         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2652         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2653
2654         /* Prio-queueing implicitly uses the default priorities: */
2655         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2656                 return;
2657
2658         parms->pque_magic[0] = 'P';
2659         parms->pque_magic[1] = 'Q';
2660         parms->pque_magic[2] = 'U';
2661         parms->pque_magic[3] = 'E';
2662         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2663         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2664         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2665
2666         qeth_for_each_output_queue(card, queue, i)
2667                 parms->pque_priority[i] = queue->priority;
2668 }
2669
2670 static int qeth_qdio_activate(struct qeth_card *card)
2671 {
2672         QETH_CARD_TEXT(card, 3, "qdioact");
2673         return qdio_activate(CARD_DDEV(card));
2674 }
2675
2676 static int qeth_dm_act(struct qeth_card *card)
2677 {
2678         struct qeth_cmd_buffer *iob;
2679
2680         QETH_CARD_TEXT(card, 2, "dmact");
2681
2682         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2683         if (!iob)
2684                 return -ENOMEM;
2685
2686         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2687                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2688         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2689                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2690         return qeth_send_control_data(card, iob, NULL, NULL);
2691 }
2692
2693 static int qeth_mpc_initialize(struct qeth_card *card)
2694 {
2695         int rc;
2696
2697         QETH_CARD_TEXT(card, 2, "mpcinit");
2698
2699         rc = qeth_issue_next_read(card);
2700         if (rc) {
2701                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2702                 return rc;
2703         }
2704         rc = qeth_cm_enable(card);
2705         if (rc) {
2706                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2707                 return rc;
2708         }
2709         rc = qeth_cm_setup(card);
2710         if (rc) {
2711                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2712                 return rc;
2713         }
2714         rc = qeth_ulp_enable(card);
2715         if (rc) {
2716                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2717                 return rc;
2718         }
2719         rc = qeth_ulp_setup(card);
2720         if (rc) {
2721                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2722                 return rc;
2723         }
2724         rc = qeth_alloc_qdio_queues(card);
2725         if (rc) {
2726                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2727                 return rc;
2728         }
2729         rc = qeth_qdio_establish(card);
2730         if (rc) {
2731                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2732                 qeth_free_qdio_queues(card);
2733                 return rc;
2734         }
2735         rc = qeth_qdio_activate(card);
2736         if (rc) {
2737                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2738                 return rc;
2739         }
2740         rc = qeth_dm_act(card);
2741         if (rc) {
2742                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2743                 return rc;
2744         }
2745
2746         return 0;
2747 }
2748
2749 static void qeth_print_status_message(struct qeth_card *card)
2750 {
2751         switch (card->info.type) {
2752         case QETH_CARD_TYPE_OSD:
2753         case QETH_CARD_TYPE_OSM:
2754         case QETH_CARD_TYPE_OSX:
2755                 /* VM will use a non-zero first character
2756                  * to indicate a HiperSockets like reporting
2757                  * of the level OSA sets the first character to zero
2758                  * */
2759                 if (!card->info.mcl_level[0]) {
2760                         sprintf(card->info.mcl_level, "%02x%02x",
2761                                 card->info.mcl_level[2],
2762                                 card->info.mcl_level[3]);
2763                         break;
2764                 }
2765                 fallthrough;
2766         case QETH_CARD_TYPE_IQD:
2767                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2768                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2769                                 card->info.mcl_level[0]];
2770                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2771                                 card->info.mcl_level[1]];
2772                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2773                                 card->info.mcl_level[2]];
2774                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2775                                 card->info.mcl_level[3]];
2776                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2777                 }
2778                 break;
2779         default:
2780                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2781         }
2782         dev_info(&card->gdev->dev,
2783                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2784                  qeth_get_cardname(card),
2785                  (card->info.mcl_level[0]) ? " (level: " : "",
2786                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2787                  (card->info.mcl_level[0]) ? ")" : "",
2788                  qeth_get_cardname_short(card));
2789 }
2790
2791 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2792 {
2793         struct qeth_buffer_pool_entry *entry;
2794
2795         QETH_CARD_TEXT(card, 5, "inwrklst");
2796
2797         list_for_each_entry(entry,
2798                             &card->qdio.init_pool.entry_list, init_list) {
2799                 qeth_put_buffer_pool_entry(card, entry);
2800         }
2801 }
2802
2803 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2804                                         struct qeth_card *card)
2805 {
2806         struct qeth_buffer_pool_entry *entry;
2807         int i, free;
2808
2809         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2810                 return NULL;
2811
2812         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2813                 free = 1;
2814                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2815                         if (page_count(entry->elements[i]) > 1) {
2816                                 free = 0;
2817                                 break;
2818                         }
2819                 }
2820                 if (free) {
2821                         list_del_init(&entry->list);
2822                         return entry;
2823                 }
2824         }
2825
2826         /* no free buffer in pool so take first one and swap pages */
2827         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2828                                  struct qeth_buffer_pool_entry, list);
2829         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2830                 if (page_count(entry->elements[i]) > 1) {
2831                         struct page *page = dev_alloc_page();
2832
2833                         if (!page)
2834                                 return NULL;
2835
2836                         __free_page(entry->elements[i]);
2837                         entry->elements[i] = page;
2838                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2839                 }
2840         }
2841         list_del_init(&entry->list);
2842         return entry;
2843 }
2844
2845 static int qeth_init_input_buffer(struct qeth_card *card,
2846                 struct qeth_qdio_buffer *buf)
2847 {
2848         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2849         int i;
2850
2851         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2852                 buf->rx_skb = netdev_alloc_skb(card->dev,
2853                                                ETH_HLEN +
2854                                                sizeof(struct ipv6hdr));
2855                 if (!buf->rx_skb)
2856                         return -ENOMEM;
2857         }
2858
2859         if (!pool_entry) {
2860                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2861                 if (!pool_entry)
2862                         return -ENOBUFS;
2863
2864                 buf->pool_entry = pool_entry;
2865         }
2866
2867         /*
2868          * since the buffer is accessed only from the input_tasklet
2869          * there shouldn't be a need to synchronize; also, since we use
2870          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2871          * buffers
2872          */
2873         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2874                 buf->buffer->element[i].length = PAGE_SIZE;
2875                 buf->buffer->element[i].addr =
2876                         page_to_phys(pool_entry->elements[i]);
2877                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2878                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2879                 else
2880                         buf->buffer->element[i].eflags = 0;
2881                 buf->buffer->element[i].sflags = 0;
2882         }
2883         return 0;
2884 }
2885
2886 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2887                                             struct qeth_qdio_out_q *queue)
2888 {
2889         if (!IS_IQD(card) ||
2890             qeth_iqd_is_mcast_queue(card, queue) ||
2891             card->options.cq == QETH_CQ_ENABLED ||
2892             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2893                 return 1;
2894
2895         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2896 }
2897
2898 static int qeth_init_qdio_queues(struct qeth_card *card)
2899 {
2900         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2901         unsigned int i;
2902         int rc;
2903
2904         QETH_CARD_TEXT(card, 2, "initqdqs");
2905
2906         /* inbound queue */
2907         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2908         memset(&card->rx, 0, sizeof(struct qeth_rx));
2909
2910         qeth_initialize_working_pool_list(card);
2911         /*give only as many buffers to hardware as we have buffer pool entries*/
2912         for (i = 0; i < rx_bufs; i++) {
2913                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2914                 if (rc)
2915                         return rc;
2916         }
2917
2918         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2919         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs,
2920                      NULL);
2921         if (rc) {
2922                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2923                 return rc;
2924         }
2925
2926         /* completion */
2927         rc = qeth_cq_init(card);
2928         if (rc) {
2929                 return rc;
2930         }
2931
2932         /* outbound queue */
2933         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2934                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2935
2936                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2937                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2938                 queue->next_buf_to_fill = 0;
2939                 queue->do_pack = 0;
2940                 queue->prev_hdr = NULL;
2941                 queue->coalesced_frames = 0;
2942                 queue->bulk_start = 0;
2943                 queue->bulk_count = 0;
2944                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2945                 atomic_set(&queue->used_buffers, 0);
2946                 atomic_set(&queue->set_pci_flags_count, 0);
2947                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2948         }
2949         return 0;
2950 }
2951
2952 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2953                                   struct qeth_cmd_buffer *iob)
2954 {
2955         qeth_mpc_finalize_cmd(card, iob);
2956
2957         /* override with IPA-specific values: */
2958         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2959 }
2960
2961 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
2962                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
2963 {
2964         u8 prot_type = qeth_mpc_select_prot_type(card);
2965         u16 total_length = iob->length;
2966
2967         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2968                        iob->data);
2969         iob->finalize = qeth_ipa_finalize_cmd;
2970
2971         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2972         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2973         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2974         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2975         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2976         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2977                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2978         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2979 }
2980
2981 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
2982                                  struct qeth_cmd_buffer *reply)
2983 {
2984         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
2985
2986         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
2987 }
2988
2989 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2990                                            enum qeth_ipa_cmds cmd_code,
2991                                            enum qeth_prot_versions prot,
2992                                            unsigned int data_length)
2993 {
2994         struct qeth_cmd_buffer *iob;
2995         struct qeth_ipacmd_hdr *hdr;
2996
2997         data_length += offsetof(struct qeth_ipa_cmd, data);
2998         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2999                              QETH_IPA_TIMEOUT);
3000         if (!iob)
3001                 return NULL;
3002
3003         qeth_prepare_ipa_cmd(card, iob, data_length);
3004         iob->match = qeth_ipa_match_reply;
3005
3006         hdr = &__ipa_cmd(iob)->hdr;
3007         hdr->command = cmd_code;
3008         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3009         /* hdr->seqno is set by qeth_send_control_data() */
3010         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3011         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3012         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3013         hdr->param_count = 1;
3014         hdr->prot_version = prot;
3015         return iob;
3016 }
3017 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3018
3019 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3020                                 struct qeth_reply *reply, unsigned long data)
3021 {
3022         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3023
3024         return (cmd->hdr.return_code) ? -EIO : 0;
3025 }
3026
3027 /*
3028  * qeth_send_ipa_cmd() - send an IPA command
3029  *
3030  * See qeth_send_control_data() for explanation of the arguments.
3031  */
3032
3033 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3034                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3035                         unsigned long),
3036                 void *reply_param)
3037 {
3038         int rc;
3039
3040         QETH_CARD_TEXT(card, 4, "sendipa");
3041
3042         if (card->read_or_write_problem) {
3043                 qeth_put_cmd(iob);
3044                 return -EIO;
3045         }
3046
3047         if (reply_cb == NULL)
3048                 reply_cb = qeth_send_ipa_cmd_cb;
3049         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3050         if (rc == -ETIME) {
3051                 qeth_clear_ipacmd_list(card);
3052                 qeth_schedule_recovery(card);
3053         }
3054         return rc;
3055 }
3056 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3057
3058 static int qeth_send_startlan_cb(struct qeth_card *card,
3059                                  struct qeth_reply *reply, unsigned long data)
3060 {
3061         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3062
3063         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3064                 return -ENETDOWN;
3065
3066         return (cmd->hdr.return_code) ? -EIO : 0;
3067 }
3068
3069 static int qeth_send_startlan(struct qeth_card *card)
3070 {
3071         struct qeth_cmd_buffer *iob;
3072
3073         QETH_CARD_TEXT(card, 2, "strtlan");
3074
3075         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3076         if (!iob)
3077                 return -ENOMEM;
3078         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3079 }
3080
3081 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3082 {
3083         if (!cmd->hdr.return_code)
3084                 cmd->hdr.return_code =
3085                         cmd->data.setadapterparms.hdr.return_code;
3086         return cmd->hdr.return_code;
3087 }
3088
3089 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3090                 struct qeth_reply *reply, unsigned long data)
3091 {
3092         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3093         struct qeth_query_cmds_supp *query_cmd;
3094
3095         QETH_CARD_TEXT(card, 3, "quyadpcb");
3096         if (qeth_setadpparms_inspect_rc(cmd))
3097                 return -EIO;
3098
3099         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3100         if (query_cmd->lan_type & 0x7f) {
3101                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3102                         return -EPROTONOSUPPORT;
3103
3104                 card->info.link_type = query_cmd->lan_type;
3105                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3106         }
3107
3108         card->options.adp.supported = query_cmd->supported_cmds;
3109         return 0;
3110 }
3111
3112 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3113                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3114                                                     unsigned int data_length)
3115 {
3116         struct qeth_ipacmd_setadpparms_hdr *hdr;
3117         struct qeth_cmd_buffer *iob;
3118
3119         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3120                                  data_length +
3121                                  offsetof(struct qeth_ipacmd_setadpparms,
3122                                           data));
3123         if (!iob)
3124                 return NULL;
3125
3126         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3127         hdr->cmdlength = sizeof(*hdr) + data_length;
3128         hdr->command_code = adp_cmd;
3129         hdr->used_total = 1;
3130         hdr->seq_no = 1;
3131         return iob;
3132 }
3133
3134 static int qeth_query_setadapterparms(struct qeth_card *card)
3135 {
3136         int rc;
3137         struct qeth_cmd_buffer *iob;
3138
3139         QETH_CARD_TEXT(card, 3, "queryadp");
3140         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3141                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3142         if (!iob)
3143                 return -ENOMEM;
3144         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3145         return rc;
3146 }
3147
3148 static int qeth_query_ipassists_cb(struct qeth_card *card,
3149                 struct qeth_reply *reply, unsigned long data)
3150 {
3151         struct qeth_ipa_cmd *cmd;
3152
3153         QETH_CARD_TEXT(card, 2, "qipasscb");
3154
3155         cmd = (struct qeth_ipa_cmd *) data;
3156
3157         switch (cmd->hdr.return_code) {
3158         case IPA_RC_SUCCESS:
3159                 break;
3160         case IPA_RC_NOTSUPP:
3161         case IPA_RC_L2_UNSUPPORTED_CMD:
3162                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3163                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3164                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3165                 return -EOPNOTSUPP;
3166         default:
3167                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3168                                  CARD_DEVID(card), cmd->hdr.return_code);
3169                 return -EIO;
3170         }
3171
3172         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3173                 card->options.ipa4 = cmd->hdr.assists;
3174         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3175                 card->options.ipa6 = cmd->hdr.assists;
3176         else
3177                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3178                                  CARD_DEVID(card));
3179         return 0;
3180 }
3181
3182 static int qeth_query_ipassists(struct qeth_card *card,
3183                                 enum qeth_prot_versions prot)
3184 {
3185         int rc;
3186         struct qeth_cmd_buffer *iob;
3187
3188         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3189         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3190         if (!iob)
3191                 return -ENOMEM;
3192         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3193         return rc;
3194 }
3195
3196 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3197                                 struct qeth_reply *reply, unsigned long data)
3198 {
3199         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3200         struct qeth_query_switch_attributes *attrs;
3201         struct qeth_switch_info *sw_info;
3202
3203         QETH_CARD_TEXT(card, 2, "qswiatcb");
3204         if (qeth_setadpparms_inspect_rc(cmd))
3205                 return -EIO;
3206
3207         sw_info = (struct qeth_switch_info *)reply->param;
3208         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3209         sw_info->capabilities = attrs->capabilities;
3210         sw_info->settings = attrs->settings;
3211         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3212                         sw_info->settings);
3213         return 0;
3214 }
3215
3216 int qeth_query_switch_attributes(struct qeth_card *card,
3217                                  struct qeth_switch_info *sw_info)
3218 {
3219         struct qeth_cmd_buffer *iob;
3220
3221         QETH_CARD_TEXT(card, 2, "qswiattr");
3222         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3223                 return -EOPNOTSUPP;
3224         if (!netif_carrier_ok(card->dev))
3225                 return -ENOMEDIUM;
3226         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3227         if (!iob)
3228                 return -ENOMEM;
3229         return qeth_send_ipa_cmd(card, iob,
3230                                 qeth_query_switch_attributes_cb, sw_info);
3231 }
3232
3233 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3234                                           enum qeth_diags_cmds sub_cmd,
3235                                           unsigned int data_length)
3236 {
3237         struct qeth_ipacmd_diagass *cmd;
3238         struct qeth_cmd_buffer *iob;
3239
3240         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3241                                  DIAG_HDR_LEN + data_length);
3242         if (!iob)
3243                 return NULL;
3244
3245         cmd = &__ipa_cmd(iob)->data.diagass;
3246         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3247         cmd->subcmd = sub_cmd;
3248         return iob;
3249 }
3250 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3251
3252 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3253                 struct qeth_reply *reply, unsigned long data)
3254 {
3255         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3256         u16 rc = cmd->hdr.return_code;
3257
3258         if (rc) {
3259                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3260                 return -EIO;
3261         }
3262
3263         card->info.diagass_support = cmd->data.diagass.ext;
3264         return 0;
3265 }
3266
3267 static int qeth_query_setdiagass(struct qeth_card *card)
3268 {
3269         struct qeth_cmd_buffer *iob;
3270
3271         QETH_CARD_TEXT(card, 2, "qdiagass");
3272         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3273         if (!iob)
3274                 return -ENOMEM;
3275         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3276 }
3277
3278 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3279 {
3280         unsigned long info = get_zeroed_page(GFP_KERNEL);
3281         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3282         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3283         struct ccw_dev_id ccwid;
3284         int level;
3285
3286         tid->chpid = card->info.chpid;
3287         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3288         tid->ssid = ccwid.ssid;
3289         tid->devno = ccwid.devno;
3290         if (!info)
3291                 return;
3292         level = stsi(NULL, 0, 0, 0);
3293         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3294                 tid->lparnr = info222->lpar_number;
3295         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3296                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3297                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3298         }
3299         free_page(info);
3300 }
3301
3302 static int qeth_hw_trap_cb(struct qeth_card *card,
3303                 struct qeth_reply *reply, unsigned long data)
3304 {
3305         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3306         u16 rc = cmd->hdr.return_code;
3307
3308         if (rc) {
3309                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3310                 return -EIO;
3311         }
3312         return 0;
3313 }
3314
3315 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3316 {
3317         struct qeth_cmd_buffer *iob;
3318         struct qeth_ipa_cmd *cmd;
3319
3320         QETH_CARD_TEXT(card, 2, "diagtrap");
3321         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3322         if (!iob)
3323                 return -ENOMEM;
3324         cmd = __ipa_cmd(iob);
3325         cmd->data.diagass.type = 1;
3326         cmd->data.diagass.action = action;
3327         switch (action) {
3328         case QETH_DIAGS_TRAP_ARM:
3329                 cmd->data.diagass.options = 0x0003;
3330                 cmd->data.diagass.ext = 0x00010000 +
3331                         sizeof(struct qeth_trap_id);
3332                 qeth_get_trap_id(card,
3333                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3334                 break;
3335         case QETH_DIAGS_TRAP_DISARM:
3336                 cmd->data.diagass.options = 0x0001;
3337                 break;
3338         case QETH_DIAGS_TRAP_CAPTURE:
3339                 break;
3340         }
3341         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3342 }
3343
3344 static int qeth_check_qdio_errors(struct qeth_card *card,
3345                                   struct qdio_buffer *buf,
3346                                   unsigned int qdio_error,
3347                                   const char *dbftext)
3348 {
3349         if (qdio_error) {
3350                 QETH_CARD_TEXT(card, 2, dbftext);
3351                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3352                                buf->element[15].sflags);
3353                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3354                                buf->element[14].sflags);
3355                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3356                 if ((buf->element[15].sflags) == 0x12) {
3357                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3358                         return 0;
3359                 } else
3360                         return 1;
3361         }
3362         return 0;
3363 }
3364
3365 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3366                                          unsigned int count)
3367 {
3368         struct qeth_qdio_q *queue = card->qdio.in_q;
3369         struct list_head *lh;
3370         int i;
3371         int rc;
3372         int newcount = 0;
3373
3374         /* only requeue at a certain threshold to avoid SIGAs */
3375         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3376                 for (i = queue->next_buf_to_init;
3377                      i < queue->next_buf_to_init + count; ++i) {
3378                         if (qeth_init_input_buffer(card,
3379                                 &queue->bufs[QDIO_BUFNR(i)])) {
3380                                 break;
3381                         } else {
3382                                 newcount++;
3383                         }
3384                 }
3385
3386                 if (newcount < count) {
3387                         /* we are in memory shortage so we switch back to
3388                            traditional skb allocation and drop packages */
3389                         atomic_set(&card->force_alloc_skb, 3);
3390                         count = newcount;
3391                 } else {
3392                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3393                 }
3394
3395                 if (!count) {
3396                         i = 0;
3397                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3398                                 i++;
3399                         if (i == card->qdio.in_buf_pool.buf_count) {
3400                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3401                                 schedule_delayed_work(
3402                                         &card->buffer_reclaim_work,
3403                                         QETH_RECLAIM_WORK_TIME);
3404                         }
3405                         return 0;
3406                 }
3407
3408                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3409                              queue->next_buf_to_init, count, NULL);
3410                 if (rc) {
3411                         QETH_CARD_TEXT(card, 2, "qinberr");
3412                 }
3413                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3414                                                      count);
3415                 return count;
3416         }
3417
3418         return 0;
3419 }
3420
3421 static void qeth_buffer_reclaim_work(struct work_struct *work)
3422 {
3423         struct qeth_card *card = container_of(to_delayed_work(work),
3424                                               struct qeth_card,
3425                                               buffer_reclaim_work);
3426
3427         local_bh_disable();
3428         napi_schedule(&card->napi);
3429         /* kick-start the NAPI softirq: */
3430         local_bh_enable();
3431 }
3432
3433 static void qeth_handle_send_error(struct qeth_card *card,
3434                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3435 {
3436         int sbalf15 = buffer->buffer->element[15].sflags;
3437
3438         QETH_CARD_TEXT(card, 6, "hdsnderr");
3439         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3440
3441         if (!qdio_err)
3442                 return;
3443
3444         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3445                 return;
3446
3447         QETH_CARD_TEXT(card, 1, "lnkfail");
3448         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3449                        (u16)qdio_err, (u8)sbalf15);
3450 }
3451
3452 /**
3453  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3454  * @queue: queue to check for packing buffer
3455  *
3456  * Returns number of buffers that were prepared for flush.
3457  */
3458 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3459 {
3460         struct qeth_qdio_out_buffer *buffer;
3461
3462         buffer = queue->bufs[queue->next_buf_to_fill];
3463         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3464             (buffer->next_element_to_fill > 0)) {
3465                 /* it's a packing buffer */
3466                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3467                 queue->next_buf_to_fill =
3468                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3469                 return 1;
3470         }
3471         return 0;
3472 }
3473
3474 /*
3475  * Switched to packing state if the number of used buffers on a queue
3476  * reaches a certain limit.
3477  */
3478 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3479 {
3480         if (!queue->do_pack) {
3481                 if (atomic_read(&queue->used_buffers)
3482                     >= QETH_HIGH_WATERMARK_PACK){
3483                         /* switch non-PACKING -> PACKING */
3484                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3485                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3486                         queue->do_pack = 1;
3487                 }
3488         }
3489 }
3490
3491 /*
3492  * Switches from packing to non-packing mode. If there is a packing
3493  * buffer on the queue this buffer will be prepared to be flushed.
3494  * In that case 1 is returned to inform the caller. If no buffer
3495  * has to be flushed, zero is returned.
3496  */
3497 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3498 {
3499         if (queue->do_pack) {
3500                 if (atomic_read(&queue->used_buffers)
3501                     <= QETH_LOW_WATERMARK_PACK) {
3502                         /* switch PACKING -> non-PACKING */
3503                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3504                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3505                         queue->do_pack = 0;
3506                         return qeth_prep_flush_pack_buffer(queue);
3507                 }
3508         }
3509         return 0;
3510 }
3511
3512 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3513                                int count)
3514 {
3515         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3516         struct qeth_card *card = queue->card;
3517         unsigned int frames, usecs;
3518         struct qaob *aob = NULL;
3519         int rc;
3520         int i;
3521
3522         for (i = index; i < index + count; ++i) {
3523                 unsigned int bidx = QDIO_BUFNR(i);
3524                 struct sk_buff *skb;
3525
3526                 buf = queue->bufs[bidx];
3527                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3528                                 SBAL_EFLAGS_LAST_ENTRY;
3529                 queue->coalesced_frames += buf->frames;
3530
3531                 if (IS_IQD(card)) {
3532                         skb_queue_walk(&buf->skb_list, skb)
3533                                 skb_tx_timestamp(skb);
3534                 }
3535         }
3536
3537         if (IS_IQD(card)) {
3538                 if (card->options.cq == QETH_CQ_ENABLED &&
3539                     !qeth_iqd_is_mcast_queue(card, queue) &&
3540                     count == 1) {
3541                         if (!buf->aob)
3542                                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3543                                                              GFP_ATOMIC);
3544                         if (buf->aob) {
3545                                 struct qeth_qaob_priv1 *priv;
3546
3547                                 aob = buf->aob;
3548                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3549                                 priv->state = QETH_QAOB_ISSUED;
3550                                 priv->queue_no = queue->queue_no;
3551                         }
3552                 }
3553         } else {
3554                 if (!queue->do_pack) {
3555                         if ((atomic_read(&queue->used_buffers) >=
3556                                 (QETH_HIGH_WATERMARK_PACK -
3557                                  QETH_WATERMARK_PACK_FUZZ)) &&
3558                             !atomic_read(&queue->set_pci_flags_count)) {
3559                                 /* it's likely that we'll go to packing
3560                                  * mode soon */
3561                                 atomic_inc(&queue->set_pci_flags_count);
3562                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3563                         }
3564                 } else {
3565                         if (!atomic_read(&queue->set_pci_flags_count)) {
3566                                 /*
3567                                  * there's no outstanding PCI any more, so we
3568                                  * have to request a PCI to be sure the the PCI
3569                                  * will wake at some time in the future then we
3570                                  * can flush packed buffers that might still be
3571                                  * hanging around, which can happen if no
3572                                  * further send was requested by the stack
3573                                  */
3574                                 atomic_inc(&queue->set_pci_flags_count);
3575                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3576                         }
3577                 }
3578         }
3579
3580         QETH_TXQ_STAT_INC(queue, doorbell);
3581         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_OUTPUT, queue->queue_no,
3582                      index, count, aob);
3583
3584         switch (rc) {
3585         case 0:
3586         case -ENOBUFS:
3587                 /* ignore temporary SIGA errors without busy condition */
3588
3589                 /* Fake the TX completion interrupt: */
3590                 frames = READ_ONCE(queue->max_coalesced_frames);
3591                 usecs = READ_ONCE(queue->coalesce_usecs);
3592
3593                 if (frames && queue->coalesced_frames >= frames) {
3594                         napi_schedule(&queue->napi);
3595                         queue->coalesced_frames = 0;
3596                         QETH_TXQ_STAT_INC(queue, coal_frames);
3597                 } else if (qeth_use_tx_irqs(card) &&
3598                            atomic_read(&queue->used_buffers) >= 32) {
3599                         /* Old behaviour carried over from the qdio layer: */
3600                         napi_schedule(&queue->napi);
3601                         QETH_TXQ_STAT_INC(queue, coal_frames);
3602                 } else if (usecs) {
3603                         qeth_tx_arm_timer(queue, usecs);
3604                 }
3605
3606                 break;
3607         default:
3608                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3609                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3610                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3611                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3612                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3613
3614                 /* this must not happen under normal circumstances. if it
3615                  * happens something is really wrong -> recover */
3616                 qeth_schedule_recovery(queue->card);
3617         }
3618 }
3619
3620 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3621 {
3622         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3623
3624         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3625         queue->prev_hdr = NULL;
3626         queue->bulk_count = 0;
3627 }
3628
3629 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3630 {
3631         /*
3632          * check if weed have to switch to non-packing mode or if
3633          * we have to get a pci flag out on the queue
3634          */
3635         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3636             !atomic_read(&queue->set_pci_flags_count)) {
3637                 unsigned int index, flush_cnt;
3638                 bool q_was_packing;
3639
3640                 spin_lock(&queue->lock);
3641
3642                 index = queue->next_buf_to_fill;
3643                 q_was_packing = queue->do_pack;
3644
3645                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3646                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3647                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3648
3649                 if (flush_cnt) {
3650                         qeth_flush_buffers(queue, index, flush_cnt);
3651                         if (q_was_packing)
3652                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3653                 }
3654
3655                 spin_unlock(&queue->lock);
3656         }
3657 }
3658
3659 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3660 {
3661         struct qeth_card *card = (struct qeth_card *)card_ptr;
3662
3663         napi_schedule_irqoff(&card->napi);
3664 }
3665
3666 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3667 {
3668         int rc;
3669
3670         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3671                 rc = -1;
3672                 goto out;
3673         } else {
3674                 if (card->options.cq == cq) {
3675                         rc = 0;
3676                         goto out;
3677                 }
3678
3679                 qeth_free_qdio_queues(card);
3680                 card->options.cq = cq;
3681                 rc = 0;
3682         }
3683 out:
3684         return rc;
3685
3686 }
3687 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3688
3689 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3690 {
3691         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3692         unsigned int queue_no = priv->queue_no;
3693
3694         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3695
3696         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3697             queue_no < card->qdio.no_out_queues)
3698                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3699 }
3700
3701 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3702                                  unsigned int queue, int first_element,
3703                                  int count)
3704 {
3705         struct qeth_qdio_q *cq = card->qdio.c_q;
3706         int i;
3707         int rc;
3708
3709         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3710         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3711         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3712
3713         if (qdio_err) {
3714                 netif_tx_stop_all_queues(card->dev);
3715                 qeth_schedule_recovery(card);
3716                 return;
3717         }
3718
3719         for (i = first_element; i < first_element + count; ++i) {
3720                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3721                 int e = 0;
3722
3723                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3724                        buffer->element[e].addr) {
3725                         unsigned long phys_aob_addr = buffer->element[e].addr;
3726
3727                         qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3728                         ++e;
3729                 }
3730                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3731         }
3732         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3733                      cq->next_buf_to_init, count, NULL);
3734         if (rc) {
3735                 dev_warn(&card->gdev->dev,
3736                         "QDIO reported an error, rc=%i\n", rc);
3737                 QETH_CARD_TEXT(card, 2, "qcqherr");
3738         }
3739
3740         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3741 }
3742
3743 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3744                                     unsigned int qdio_err, int queue,
3745                                     int first_elem, int count,
3746                                     unsigned long card_ptr)
3747 {
3748         struct qeth_card *card = (struct qeth_card *)card_ptr;
3749
3750         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3751         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3752
3753         if (qdio_err)
3754                 qeth_schedule_recovery(card);
3755 }
3756
3757 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3758                                      unsigned int qdio_error, int __queue,
3759                                      int first_element, int count,
3760                                      unsigned long card_ptr)
3761 {
3762         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3763
3764         QETH_CARD_TEXT(card, 2, "achkcond");
3765         netif_tx_stop_all_queues(card->dev);
3766         qeth_schedule_recovery(card);
3767 }
3768
3769 /*
3770  * Note: Function assumes that we have 4 outbound queues.
3771  */
3772 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3773 {
3774         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3775         u8 tos;
3776
3777         switch (card->qdio.do_prio_queueing) {
3778         case QETH_PRIO_Q_ING_TOS:
3779         case QETH_PRIO_Q_ING_PREC:
3780                 switch (vlan_get_protocol(skb)) {
3781                 case htons(ETH_P_IP):
3782                         tos = ipv4_get_dsfield(ip_hdr(skb));
3783                         break;
3784                 case htons(ETH_P_IPV6):
3785                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3786                         break;
3787                 default:
3788                         return card->qdio.default_out_queue;
3789                 }
3790                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3791                         return ~tos >> 6 & 3;
3792                 if (tos & IPTOS_MINCOST)
3793                         return 3;
3794                 if (tos & IPTOS_RELIABILITY)
3795                         return 2;
3796                 if (tos & IPTOS_THROUGHPUT)
3797                         return 1;
3798                 if (tos & IPTOS_LOWDELAY)
3799                         return 0;
3800                 break;
3801         case QETH_PRIO_Q_ING_SKB:
3802                 if (skb->priority > 5)
3803                         return 0;
3804                 return ~skb->priority >> 1 & 3;
3805         case QETH_PRIO_Q_ING_VLAN:
3806                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3807                         return ~ntohs(veth->h_vlan_TCI) >>
3808                                (VLAN_PRIO_SHIFT + 1) & 3;
3809                 break;
3810         case QETH_PRIO_Q_ING_FIXED:
3811                 return card->qdio.default_out_queue;
3812         default:
3813                 break;
3814         }
3815         return card->qdio.default_out_queue;
3816 }
3817
3818 /**
3819  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3820  * @skb:                                SKB address
3821  *
3822  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3823  * fragmented part of the SKB. Returns zero for linear SKB.
3824  */
3825 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3826 {
3827         int cnt, elements = 0;
3828
3829         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3830                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3831
3832                 elements += qeth_get_elements_for_range(
3833                         (addr_t)skb_frag_address(frag),
3834                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3835         }
3836         return elements;
3837 }
3838
3839 /**
3840  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3841  *                              to transmit an skb.
3842  * @skb:                        the skb to operate on.
3843  * @data_offset:                skip this part of the skb's linear data
3844  *
3845  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3846  * skb's data (both its linear part and paged fragments).
3847  */
3848 static unsigned int qeth_count_elements(struct sk_buff *skb,
3849                                         unsigned int data_offset)
3850 {
3851         unsigned int elements = qeth_get_elements_for_frags(skb);
3852         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3853         addr_t start = (addr_t)skb->data + data_offset;
3854
3855         if (start != end)
3856                 elements += qeth_get_elements_for_range(start, end);
3857         return elements;
3858 }
3859
3860 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3861                                          MAX_TCP_HEADER)
3862
3863 /**
3864  * qeth_add_hw_header() - add a HW header to an skb.
3865  * @queue: TX queue that the skb will be placed on.
3866  * @skb: skb that the HW header should be added to.
3867  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3868  *       it contains a valid pointer to a qeth_hdr.
3869  * @hdr_len: length of the HW header.
3870  * @proto_len: length of protocol headers that need to be in same page as the
3871  *             HW header.
3872  * @elements: returns the required number of buffer elements for this skb.
3873  *
3874  * Returns the pushed length. If the header can't be pushed on
3875  * (eg. because it would cross a page boundary), it is allocated from
3876  * the cache instead and 0 is returned.
3877  * The number of needed buffer elements is returned in @elements.
3878  * Error to create the hdr is indicated by returning with < 0.
3879  */
3880 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3881                               struct sk_buff *skb, struct qeth_hdr **hdr,
3882                               unsigned int hdr_len, unsigned int proto_len,
3883                               unsigned int *elements)
3884 {
3885         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3886         const unsigned int contiguous = proto_len ? proto_len : 1;
3887         const unsigned int max_elements = queue->max_elements;
3888         unsigned int __elements;
3889         addr_t start, end;
3890         bool push_ok;
3891         int rc;
3892
3893 check_layout:
3894         start = (addr_t)skb->data - hdr_len;
3895         end = (addr_t)skb->data;
3896
3897         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3898                 /* Push HW header into same page as first protocol header. */
3899                 push_ok = true;
3900                 /* ... but TSO always needs a separate element for headers: */
3901                 if (skb_is_gso(skb))
3902                         __elements = 1 + qeth_count_elements(skb, proto_len);
3903                 else
3904                         __elements = qeth_count_elements(skb, 0);
3905         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3906                 /* Push HW header into preceding page, flush with skb->data. */
3907                 push_ok = true;
3908                 __elements = 1 + qeth_count_elements(skb, 0);
3909         } else {
3910                 /* Use header cache, copy protocol headers up. */
3911                 push_ok = false;
3912                 __elements = 1 + qeth_count_elements(skb, proto_len);
3913         }
3914
3915         /* Compress skb to fit into one IO buffer: */
3916         if (__elements > max_elements) {
3917                 if (!skb_is_nonlinear(skb)) {
3918                         /* Drop it, no easy way of shrinking it further. */
3919                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3920                                          max_elements, __elements, skb->len);
3921                         return -E2BIG;
3922                 }
3923
3924                 rc = skb_linearize(skb);
3925                 if (rc) {
3926                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3927                         return rc;
3928                 }
3929
3930                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3931                 /* Linearization changed the layout, re-evaluate: */
3932                 goto check_layout;
3933         }
3934
3935         *elements = __elements;
3936         /* Add the header: */
3937         if (push_ok) {
3938                 *hdr = skb_push(skb, hdr_len);
3939                 return hdr_len;
3940         }
3941
3942         /* Fall back to cache element with known-good alignment: */
3943         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3944                 return -E2BIG;
3945         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3946         if (!*hdr)
3947                 return -ENOMEM;
3948         /* Copy protocol headers behind HW header: */
3949         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3950         return 0;
3951 }
3952
3953 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3954                               struct sk_buff *curr_skb,
3955                               struct qeth_hdr *curr_hdr)
3956 {
3957         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3958         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3959
3960         if (!prev_hdr)
3961                 return true;
3962
3963         /* All packets must have the same target: */
3964         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3965                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3966
3967                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3968                                         eth_hdr(curr_skb)->h_dest) &&
3969                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3970         }
3971
3972         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3973                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3974 }
3975
3976 /**
3977  * qeth_fill_buffer() - map skb into an output buffer
3978  * @buf:        buffer to transport the skb
3979  * @skb:        skb to map into the buffer
3980  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3981  *              from qeth_core_header_cache.
3982  * @offset:     when mapping the skb, start at skb->data + offset
3983  * @hd_len:     if > 0, build a dedicated header element of this size
3984  */
3985 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
3986                                      struct sk_buff *skb, struct qeth_hdr *hdr,
3987                                      unsigned int offset, unsigned int hd_len)
3988 {
3989         struct qdio_buffer *buffer = buf->buffer;
3990         int element = buf->next_element_to_fill;
3991         int length = skb_headlen(skb) - offset;
3992         char *data = skb->data + offset;
3993         unsigned int elem_length, cnt;
3994         bool is_first_elem = true;
3995
3996         __skb_queue_tail(&buf->skb_list, skb);
3997
3998         /* build dedicated element for HW Header */
3999         if (hd_len) {
4000                 is_first_elem = false;
4001
4002                 buffer->element[element].addr = virt_to_phys(hdr);
4003                 buffer->element[element].length = hd_len;
4004                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4005
4006                 /* HW header is allocated from cache: */
4007                 if ((void *)hdr != skb->data)
4008                         __set_bit(element, buf->from_kmem_cache);
4009                 /* HW header was pushed and is contiguous with linear part: */
4010                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4011                          (data == (char *)hdr + hd_len))
4012                         buffer->element[element].eflags |=
4013                                 SBAL_EFLAGS_CONTIGUOUS;
4014
4015                 element++;
4016         }
4017
4018         /* map linear part into buffer element(s) */
4019         while (length > 0) {
4020                 elem_length = min_t(unsigned int, length,
4021                                     PAGE_SIZE - offset_in_page(data));
4022
4023                 buffer->element[element].addr = virt_to_phys(data);
4024                 buffer->element[element].length = elem_length;
4025                 length -= elem_length;
4026                 if (is_first_elem) {
4027                         is_first_elem = false;
4028                         if (length || skb_is_nonlinear(skb))
4029                                 /* skb needs additional elements */
4030                                 buffer->element[element].eflags =
4031                                         SBAL_EFLAGS_FIRST_FRAG;
4032                         else
4033                                 buffer->element[element].eflags = 0;
4034                 } else {
4035                         buffer->element[element].eflags =
4036                                 SBAL_EFLAGS_MIDDLE_FRAG;
4037                 }
4038
4039                 data += elem_length;
4040                 element++;
4041         }
4042
4043         /* map page frags into buffer element(s) */
4044         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4045                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4046
4047                 data = skb_frag_address(frag);
4048                 length = skb_frag_size(frag);
4049                 while (length > 0) {
4050                         elem_length = min_t(unsigned int, length,
4051                                             PAGE_SIZE - offset_in_page(data));
4052
4053                         buffer->element[element].addr = virt_to_phys(data);
4054                         buffer->element[element].length = elem_length;
4055                         buffer->element[element].eflags =
4056                                 SBAL_EFLAGS_MIDDLE_FRAG;
4057
4058                         length -= elem_length;
4059                         data += elem_length;
4060                         element++;
4061                 }
4062         }
4063
4064         if (buffer->element[element - 1].eflags)
4065                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4066         buf->next_element_to_fill = element;
4067         return element;
4068 }
4069
4070 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4071                        struct sk_buff *skb, unsigned int elements,
4072                        struct qeth_hdr *hdr, unsigned int offset,
4073                        unsigned int hd_len)
4074 {
4075         unsigned int bytes = qdisc_pkt_len(skb);
4076         struct qeth_qdio_out_buffer *buffer;
4077         unsigned int next_element;
4078         struct netdev_queue *txq;
4079         bool stopped = false;
4080         bool flush;
4081
4082         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4083         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4084
4085         /* Just a sanity check, the wake/stop logic should ensure that we always
4086          * get a free buffer.
4087          */
4088         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4089                 return -EBUSY;
4090
4091         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4092
4093         if (flush ||
4094             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4095                 if (buffer->next_element_to_fill > 0) {
4096                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4097                         queue->bulk_count++;
4098                 }
4099
4100                 if (queue->bulk_count >= queue->bulk_max)
4101                         flush = true;
4102
4103                 if (flush)
4104                         qeth_flush_queue(queue);
4105
4106                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4107                                                 queue->bulk_count)];
4108
4109                 /* Sanity-check again: */
4110                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4111                         return -EBUSY;
4112         }
4113
4114         if (buffer->next_element_to_fill == 0 &&
4115             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4116                 /* If a TX completion happens right _here_ and misses to wake
4117                  * the txq, then our re-check below will catch the race.
4118                  */
4119                 QETH_TXQ_STAT_INC(queue, stopped);
4120                 netif_tx_stop_queue(txq);
4121                 stopped = true;
4122         }
4123
4124         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4125         buffer->bytes += bytes;
4126         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4127         queue->prev_hdr = hdr;
4128
4129         flush = __netdev_tx_sent_queue(txq, bytes,
4130                                        !stopped && netdev_xmit_more());
4131
4132         if (flush || next_element >= queue->max_elements) {
4133                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4134                 queue->bulk_count++;
4135
4136                 if (queue->bulk_count >= queue->bulk_max)
4137                         flush = true;
4138
4139                 if (flush)
4140                         qeth_flush_queue(queue);
4141         }
4142
4143         if (stopped && !qeth_out_queue_is_full(queue))
4144                 netif_tx_start_queue(txq);
4145         return 0;
4146 }
4147
4148 static int qeth_do_send_packet(struct qeth_card *card,
4149                                struct qeth_qdio_out_q *queue,
4150                                struct sk_buff *skb, struct qeth_hdr *hdr,
4151                                unsigned int offset, unsigned int hd_len,
4152                                unsigned int elements_needed)
4153 {
4154         unsigned int start_index = queue->next_buf_to_fill;
4155         struct qeth_qdio_out_buffer *buffer;
4156         unsigned int next_element;
4157         struct netdev_queue *txq;
4158         bool stopped = false;
4159         int flush_count = 0;
4160         int do_pack = 0;
4161         int rc = 0;
4162
4163         buffer = queue->bufs[queue->next_buf_to_fill];
4164
4165         /* Just a sanity check, the wake/stop logic should ensure that we always
4166          * get a free buffer.
4167          */
4168         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4169                 return -EBUSY;
4170
4171         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4172
4173         /* check if we need to switch packing state of this queue */
4174         qeth_switch_to_packing_if_needed(queue);
4175         if (queue->do_pack) {
4176                 do_pack = 1;
4177                 /* does packet fit in current buffer? */
4178                 if (buffer->next_element_to_fill + elements_needed >
4179                     queue->max_elements) {
4180                         /* ... no -> set state PRIMED */
4181                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4182                         flush_count++;
4183                         queue->next_buf_to_fill =
4184                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4185                         buffer = queue->bufs[queue->next_buf_to_fill];
4186
4187                         /* We stepped forward, so sanity-check again: */
4188                         if (atomic_read(&buffer->state) !=
4189                             QETH_QDIO_BUF_EMPTY) {
4190                                 qeth_flush_buffers(queue, start_index,
4191                                                            flush_count);
4192                                 rc = -EBUSY;
4193                                 goto out;
4194                         }
4195                 }
4196         }
4197
4198         if (buffer->next_element_to_fill == 0 &&
4199             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4200                 /* If a TX completion happens right _here_ and misses to wake
4201                  * the txq, then our re-check below will catch the race.
4202                  */
4203                 QETH_TXQ_STAT_INC(queue, stopped);
4204                 netif_tx_stop_queue(txq);
4205                 stopped = true;
4206         }
4207
4208         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4209         buffer->bytes += qdisc_pkt_len(skb);
4210         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4211
4212         if (queue->do_pack)
4213                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4214         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4215                 flush_count++;
4216                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4217                 queue->next_buf_to_fill =
4218                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4219         }
4220
4221         if (flush_count)
4222                 qeth_flush_buffers(queue, start_index, flush_count);
4223
4224 out:
4225         if (do_pack)
4226                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4227
4228         if (stopped && !qeth_out_queue_is_full(queue))
4229                 netif_tx_start_queue(txq);
4230         return rc;
4231 }
4232
4233 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4234                               unsigned int payload_len, struct sk_buff *skb,
4235                               unsigned int proto_len)
4236 {
4237         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4238
4239         ext->hdr_tot_len = sizeof(*ext);
4240         ext->imb_hdr_no = 1;
4241         ext->hdr_type = 1;
4242         ext->hdr_version = 1;
4243         ext->hdr_len = 28;
4244         ext->payload_len = payload_len;
4245         ext->mss = skb_shinfo(skb)->gso_size;
4246         ext->dg_hdr_len = proto_len;
4247 }
4248
4249 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4250               struct qeth_qdio_out_q *queue, __be16 proto,
4251               void (*fill_header)(struct qeth_qdio_out_q *queue,
4252                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4253                                   __be16 proto, unsigned int data_len))
4254 {
4255         unsigned int proto_len, hw_hdr_len;
4256         unsigned int frame_len = skb->len;
4257         bool is_tso = skb_is_gso(skb);
4258         unsigned int data_offset = 0;
4259         struct qeth_hdr *hdr = NULL;
4260         unsigned int hd_len = 0;
4261         unsigned int elements;
4262         int push_len, rc;
4263
4264         if (is_tso) {
4265                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4266                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4267         } else {
4268                 hw_hdr_len = sizeof(struct qeth_hdr);
4269                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4270         }
4271
4272         rc = skb_cow_head(skb, hw_hdr_len);
4273         if (rc)
4274                 return rc;
4275
4276         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4277                                       &elements);
4278         if (push_len < 0)
4279                 return push_len;
4280         if (is_tso || !push_len) {
4281                 /* HW header needs its own buffer element. */
4282                 hd_len = hw_hdr_len + proto_len;
4283                 data_offset = push_len + proto_len;
4284         }
4285         memset(hdr, 0, hw_hdr_len);
4286         fill_header(queue, hdr, skb, proto, frame_len);
4287         if (is_tso)
4288                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4289                                   frame_len - proto_len, skb, proto_len);
4290
4291         if (IS_IQD(card)) {
4292                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4293                                  hd_len);
4294         } else {
4295                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4296                 skb_orphan(skb);
4297                 spin_lock(&queue->lock);
4298                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4299                                          hd_len, elements);
4300                 spin_unlock(&queue->lock);
4301         }
4302
4303         if (rc && !push_len)
4304                 kmem_cache_free(qeth_core_header_cache, hdr);
4305
4306         return rc;
4307 }
4308 EXPORT_SYMBOL_GPL(qeth_xmit);
4309
4310 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4311                 struct qeth_reply *reply, unsigned long data)
4312 {
4313         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4314         struct qeth_ipacmd_setadpparms *setparms;
4315
4316         QETH_CARD_TEXT(card, 4, "prmadpcb");
4317
4318         setparms = &(cmd->data.setadapterparms);
4319         if (qeth_setadpparms_inspect_rc(cmd)) {
4320                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4321                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4322         }
4323         card->info.promisc_mode = setparms->data.mode;
4324         return (cmd->hdr.return_code) ? -EIO : 0;
4325 }
4326
4327 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4328 {
4329         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4330                                                     SET_PROMISC_MODE_OFF;
4331         struct qeth_cmd_buffer *iob;
4332         struct qeth_ipa_cmd *cmd;
4333
4334         QETH_CARD_TEXT(card, 4, "setprom");
4335         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4336
4337         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4338                                    SETADP_DATA_SIZEOF(mode));
4339         if (!iob)
4340                 return;
4341         cmd = __ipa_cmd(iob);
4342         cmd->data.setadapterparms.data.mode = mode;
4343         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4344 }
4345 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4346
4347 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4348                 struct qeth_reply *reply, unsigned long data)
4349 {
4350         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4351         struct qeth_ipacmd_setadpparms *adp_cmd;
4352
4353         QETH_CARD_TEXT(card, 4, "chgmaccb");
4354         if (qeth_setadpparms_inspect_rc(cmd))
4355                 return -EIO;
4356
4357         adp_cmd = &cmd->data.setadapterparms;
4358         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4359                 return -EADDRNOTAVAIL;
4360
4361         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4362             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4363                 return -EADDRNOTAVAIL;
4364
4365         eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4366         return 0;
4367 }
4368
4369 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4370 {
4371         int rc;
4372         struct qeth_cmd_buffer *iob;
4373         struct qeth_ipa_cmd *cmd;
4374
4375         QETH_CARD_TEXT(card, 4, "chgmac");
4376
4377         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4378                                    SETADP_DATA_SIZEOF(change_addr));
4379         if (!iob)
4380                 return -ENOMEM;
4381         cmd = __ipa_cmd(iob);
4382         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4383         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4384         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4385                         card->dev->dev_addr);
4386         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4387                                NULL);
4388         return rc;
4389 }
4390 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4391
4392 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4393                 struct qeth_reply *reply, unsigned long data)
4394 {
4395         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4396         struct qeth_set_access_ctrl *access_ctrl_req;
4397
4398         QETH_CARD_TEXT(card, 4, "setaccb");
4399
4400         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4401         QETH_CARD_TEXT_(card, 2, "rc=%d",
4402                         cmd->data.setadapterparms.hdr.return_code);
4403         if (cmd->data.setadapterparms.hdr.return_code !=
4404                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4405                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4406                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4407                                  cmd->data.setadapterparms.hdr.return_code);
4408         switch (qeth_setadpparms_inspect_rc(cmd)) {
4409         case SET_ACCESS_CTRL_RC_SUCCESS:
4410                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4411                         dev_info(&card->gdev->dev,
4412                             "QDIO data connection isolation is deactivated\n");
4413                 else
4414                         dev_info(&card->gdev->dev,
4415                             "QDIO data connection isolation is activated\n");
4416                 return 0;
4417         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4418                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4419                                  CARD_DEVID(card));
4420                 return 0;
4421         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4422                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4423                                  CARD_DEVID(card));
4424                 return 0;
4425         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4426                 dev_err(&card->gdev->dev, "Adapter does not "
4427                         "support QDIO data connection isolation\n");
4428                 return -EOPNOTSUPP;
4429         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4430                 dev_err(&card->gdev->dev,
4431                         "Adapter is dedicated. "
4432                         "QDIO data connection isolation not supported\n");
4433                 return -EOPNOTSUPP;
4434         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4435                 dev_err(&card->gdev->dev,
4436                         "TSO does not permit QDIO data connection isolation\n");
4437                 return -EPERM;
4438         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4439                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4440                         "support reflective relay mode\n");
4441                 return -EOPNOTSUPP;
4442         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4443                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4444                                         "enabled at the adjacent switch port");
4445                 return -EREMOTEIO;
4446         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4447                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4448                                         "at the adjacent switch failed\n");
4449                 /* benign error while disabling ISOLATION_MODE_FWD */
4450                 return 0;
4451         default:
4452                 return -EIO;
4453         }
4454 }
4455
4456 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4457                                      enum qeth_ipa_isolation_modes mode)
4458 {
4459         int rc;
4460         struct qeth_cmd_buffer *iob;
4461         struct qeth_ipa_cmd *cmd;
4462         struct qeth_set_access_ctrl *access_ctrl_req;
4463
4464         QETH_CARD_TEXT(card, 4, "setacctl");
4465
4466         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4467                 dev_err(&card->gdev->dev,
4468                         "Adapter does not support QDIO data connection isolation\n");
4469                 return -EOPNOTSUPP;
4470         }
4471
4472         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4473                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4474         if (!iob)
4475                 return -ENOMEM;
4476         cmd = __ipa_cmd(iob);
4477         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4478         access_ctrl_req->subcmd_code = mode;
4479
4480         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4481                                NULL);
4482         if (rc) {
4483                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4484                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4485                                  rc, CARD_DEVID(card));
4486         }
4487
4488         return rc;
4489 }
4490
4491 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4492 {
4493         struct qeth_card *card;
4494
4495         card = dev->ml_priv;
4496         QETH_CARD_TEXT(card, 4, "txtimeo");
4497         qeth_schedule_recovery(card);
4498 }
4499 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4500
4501 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4502 {
4503         struct qeth_card *card = dev->ml_priv;
4504         int rc = 0;
4505
4506         switch (regnum) {
4507         case MII_BMCR: /* Basic mode control register */
4508                 rc = BMCR_FULLDPLX;
4509                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4510                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4511                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4512                         rc |= BMCR_SPEED100;
4513                 break;
4514         case MII_BMSR: /* Basic mode status register */
4515                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4516                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4517                      BMSR_100BASE4;
4518                 break;
4519         case MII_PHYSID1: /* PHYS ID 1 */
4520                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4521                      dev->dev_addr[2];
4522                 rc = (rc >> 5) & 0xFFFF;
4523                 break;
4524         case MII_PHYSID2: /* PHYS ID 2 */
4525                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4526                 break;
4527         case MII_ADVERTISE: /* Advertisement control reg */
4528                 rc = ADVERTISE_ALL;
4529                 break;
4530         case MII_LPA: /* Link partner ability reg */
4531                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4532                      LPA_100BASE4 | LPA_LPACK;
4533                 break;
4534         case MII_EXPANSION: /* Expansion register */
4535                 break;
4536         case MII_DCOUNTER: /* disconnect counter */
4537                 break;
4538         case MII_FCSCOUNTER: /* false carrier counter */
4539                 break;
4540         case MII_NWAYTEST: /* N-way auto-neg test register */
4541                 break;
4542         case MII_RERRCOUNTER: /* rx error counter */
4543                 rc = card->stats.rx_length_errors +
4544                      card->stats.rx_frame_errors +
4545                      card->stats.rx_fifo_errors;
4546                 break;
4547         case MII_SREVISION: /* silicon revision */
4548                 break;
4549         case MII_RESV1: /* reserved 1 */
4550                 break;
4551         case MII_LBRERROR: /* loopback, rx, bypass error */
4552                 break;
4553         case MII_PHYADDR: /* physical address */
4554                 break;
4555         case MII_RESV2: /* reserved 2 */
4556                 break;
4557         case MII_TPISTATUS: /* TPI status for 10mbps */
4558                 break;
4559         case MII_NCONFIG: /* network interface config */
4560                 break;
4561         default:
4562                 break;
4563         }
4564         return rc;
4565 }
4566
4567 static int qeth_snmp_command_cb(struct qeth_card *card,
4568                                 struct qeth_reply *reply, unsigned long data)
4569 {
4570         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4571         struct qeth_arp_query_info *qinfo = reply->param;
4572         struct qeth_ipacmd_setadpparms *adp_cmd;
4573         unsigned int data_len;
4574         void *snmp_data;
4575
4576         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4577
4578         if (cmd->hdr.return_code) {
4579                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4580                 return -EIO;
4581         }
4582         if (cmd->data.setadapterparms.hdr.return_code) {
4583                 cmd->hdr.return_code =
4584                         cmd->data.setadapterparms.hdr.return_code;
4585                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4586                 return -EIO;
4587         }
4588
4589         adp_cmd = &cmd->data.setadapterparms;
4590         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4591         if (adp_cmd->hdr.seq_no == 1) {
4592                 snmp_data = &adp_cmd->data.snmp;
4593         } else {
4594                 snmp_data = &adp_cmd->data.snmp.request;
4595                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4596         }
4597
4598         /* check if there is enough room in userspace */
4599         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4600                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4601                 return -ENOSPC;
4602         }
4603         QETH_CARD_TEXT_(card, 4, "snore%i",
4604                         cmd->data.setadapterparms.hdr.used_total);
4605         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4606                         cmd->data.setadapterparms.hdr.seq_no);
4607         /*copy entries to user buffer*/
4608         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4609         qinfo->udata_offset += data_len;
4610
4611         if (cmd->data.setadapterparms.hdr.seq_no <
4612             cmd->data.setadapterparms.hdr.used_total)
4613                 return 1;
4614         return 0;
4615 }
4616
4617 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4618 {
4619         struct qeth_snmp_ureq __user *ureq;
4620         struct qeth_cmd_buffer *iob;
4621         unsigned int req_len;
4622         struct qeth_arp_query_info qinfo = {0, };
4623         int rc = 0;
4624
4625         QETH_CARD_TEXT(card, 3, "snmpcmd");
4626
4627         if (IS_VM_NIC(card))
4628                 return -EOPNOTSUPP;
4629
4630         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4631             IS_LAYER3(card))
4632                 return -EOPNOTSUPP;
4633
4634         ureq = (struct qeth_snmp_ureq __user *) udata;
4635         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4636             get_user(req_len, &ureq->hdr.req_len))
4637                 return -EFAULT;
4638
4639         /* Sanitize user input, to avoid overflows in iob size calculation: */
4640         if (req_len > QETH_BUFSIZE)
4641                 return -EINVAL;
4642
4643         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4644         if (!iob)
4645                 return -ENOMEM;
4646
4647         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4648                            &ureq->cmd, req_len)) {
4649                 qeth_put_cmd(iob);
4650                 return -EFAULT;
4651         }
4652
4653         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4654         if (!qinfo.udata) {
4655                 qeth_put_cmd(iob);
4656                 return -ENOMEM;
4657         }
4658         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4659
4660         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4661         if (rc)
4662                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4663                                  CARD_DEVID(card), rc);
4664         else {
4665                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4666                         rc = -EFAULT;
4667         }
4668
4669         kfree(qinfo.udata);
4670         return rc;
4671 }
4672
4673 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4674                                          struct qeth_reply *reply,
4675                                          unsigned long data)
4676 {
4677         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4678         struct qeth_qoat_priv *priv = reply->param;
4679         int resdatalen;
4680
4681         QETH_CARD_TEXT(card, 3, "qoatcb");
4682         if (qeth_setadpparms_inspect_rc(cmd))
4683                 return -EIO;
4684
4685         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4686
4687         if (resdatalen > (priv->buffer_len - priv->response_len))
4688                 return -ENOSPC;
4689
4690         memcpy(priv->buffer + priv->response_len,
4691                &cmd->data.setadapterparms.hdr, resdatalen);
4692         priv->response_len += resdatalen;
4693
4694         if (cmd->data.setadapterparms.hdr.seq_no <
4695             cmd->data.setadapterparms.hdr.used_total)
4696                 return 1;
4697         return 0;
4698 }
4699
4700 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4701 {
4702         int rc = 0;
4703         struct qeth_cmd_buffer *iob;
4704         struct qeth_ipa_cmd *cmd;
4705         struct qeth_query_oat *oat_req;
4706         struct qeth_query_oat_data oat_data;
4707         struct qeth_qoat_priv priv;
4708         void __user *tmp;
4709
4710         QETH_CARD_TEXT(card, 3, "qoatcmd");
4711
4712         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4713                 return -EOPNOTSUPP;
4714
4715         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4716                 return -EFAULT;
4717
4718         priv.buffer_len = oat_data.buffer_len;
4719         priv.response_len = 0;
4720         priv.buffer = vzalloc(oat_data.buffer_len);
4721         if (!priv.buffer)
4722                 return -ENOMEM;
4723
4724         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4725                                    SETADP_DATA_SIZEOF(query_oat));
4726         if (!iob) {
4727                 rc = -ENOMEM;
4728                 goto out_free;
4729         }
4730         cmd = __ipa_cmd(iob);
4731         oat_req = &cmd->data.setadapterparms.data.query_oat;
4732         oat_req->subcmd_code = oat_data.command;
4733
4734         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4735         if (!rc) {
4736                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4737                                          u64_to_user_ptr(oat_data.ptr);
4738                 oat_data.response_len = priv.response_len;
4739
4740                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4741                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4742                         rc = -EFAULT;
4743         }
4744
4745 out_free:
4746         vfree(priv.buffer);
4747         return rc;
4748 }
4749
4750 static int qeth_query_card_info_cb(struct qeth_card *card,
4751                                    struct qeth_reply *reply, unsigned long data)
4752 {
4753         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4754         struct qeth_link_info *link_info = reply->param;
4755         struct qeth_query_card_info *card_info;
4756
4757         QETH_CARD_TEXT(card, 2, "qcrdincb");
4758         if (qeth_setadpparms_inspect_rc(cmd))
4759                 return -EIO;
4760
4761         card_info = &cmd->data.setadapterparms.data.card_info;
4762         netdev_dbg(card->dev,
4763                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4764                    card_info->card_type, card_info->port_mode,
4765                    card_info->port_speed);
4766
4767         switch (card_info->port_mode) {
4768         case CARD_INFO_PORTM_FULLDUPLEX:
4769                 link_info->duplex = DUPLEX_FULL;
4770                 break;
4771         case CARD_INFO_PORTM_HALFDUPLEX:
4772                 link_info->duplex = DUPLEX_HALF;
4773                 break;
4774         default:
4775                 link_info->duplex = DUPLEX_UNKNOWN;
4776         }
4777
4778         switch (card_info->card_type) {
4779         case CARD_INFO_TYPE_1G_COPPER_A:
4780         case CARD_INFO_TYPE_1G_COPPER_B:
4781                 link_info->speed = SPEED_1000;
4782                 link_info->port = PORT_TP;
4783                 break;
4784         case CARD_INFO_TYPE_1G_FIBRE_A:
4785         case CARD_INFO_TYPE_1G_FIBRE_B:
4786                 link_info->speed = SPEED_1000;
4787                 link_info->port = PORT_FIBRE;
4788                 break;
4789         case CARD_INFO_TYPE_10G_FIBRE_A:
4790         case CARD_INFO_TYPE_10G_FIBRE_B:
4791                 link_info->speed = SPEED_10000;
4792                 link_info->port = PORT_FIBRE;
4793                 break;
4794         default:
4795                 switch (card_info->port_speed) {
4796                 case CARD_INFO_PORTS_10M:
4797                         link_info->speed = SPEED_10;
4798                         break;
4799                 case CARD_INFO_PORTS_100M:
4800                         link_info->speed = SPEED_100;
4801                         break;
4802                 case CARD_INFO_PORTS_1G:
4803                         link_info->speed = SPEED_1000;
4804                         break;
4805                 case CARD_INFO_PORTS_10G:
4806                         link_info->speed = SPEED_10000;
4807                         break;
4808                 case CARD_INFO_PORTS_25G:
4809                         link_info->speed = SPEED_25000;
4810                         break;
4811                 default:
4812                         link_info->speed = SPEED_UNKNOWN;
4813                 }
4814
4815                 link_info->port = PORT_OTHER;
4816         }
4817
4818         return 0;
4819 }
4820
4821 int qeth_query_card_info(struct qeth_card *card,
4822                          struct qeth_link_info *link_info)
4823 {
4824         struct qeth_cmd_buffer *iob;
4825
4826         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4827         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4828                 return -EOPNOTSUPP;
4829         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4830         if (!iob)
4831                 return -ENOMEM;
4832
4833         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4834 }
4835
4836 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4837                                       struct qeth_reply *reply_priv,
4838                                       unsigned long data)
4839 {
4840         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4841         struct qeth_link_info *link_info = reply_priv->param;
4842         struct qeth_query_oat_physical_if *phys_if;
4843         struct qeth_query_oat_reply *reply;
4844
4845         if (qeth_setadpparms_inspect_rc(cmd))
4846                 return -EIO;
4847
4848         /* Multi-part reply is unexpected, don't bother: */
4849         if (cmd->data.setadapterparms.hdr.used_total > 1)
4850                 return -EINVAL;
4851
4852         /* Expect the reply to start with phys_if data: */
4853         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4854         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4855             reply->length < sizeof(*reply))
4856                 return -EINVAL;
4857
4858         phys_if = &reply->phys_if;
4859
4860         switch (phys_if->speed_duplex) {
4861         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4862                 link_info->speed = SPEED_10;
4863                 link_info->duplex = DUPLEX_HALF;
4864                 break;
4865         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4866                 link_info->speed = SPEED_10;
4867                 link_info->duplex = DUPLEX_FULL;
4868                 break;
4869         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4870                 link_info->speed = SPEED_100;
4871                 link_info->duplex = DUPLEX_HALF;
4872                 break;
4873         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4874                 link_info->speed = SPEED_100;
4875                 link_info->duplex = DUPLEX_FULL;
4876                 break;
4877         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4878                 link_info->speed = SPEED_1000;
4879                 link_info->duplex = DUPLEX_HALF;
4880                 break;
4881         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4882                 link_info->speed = SPEED_1000;
4883                 link_info->duplex = DUPLEX_FULL;
4884                 break;
4885         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4886                 link_info->speed = SPEED_10000;
4887                 link_info->duplex = DUPLEX_FULL;
4888                 break;
4889         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4890                 link_info->speed = SPEED_25000;
4891                 link_info->duplex = DUPLEX_FULL;
4892                 break;
4893         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4894         default:
4895                 link_info->speed = SPEED_UNKNOWN;
4896                 link_info->duplex = DUPLEX_UNKNOWN;
4897                 break;
4898         }
4899
4900         switch (phys_if->media_type) {
4901         case QETH_QOAT_PHYS_MEDIA_COPPER:
4902                 link_info->port = PORT_TP;
4903                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4904                 break;
4905         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4906                 link_info->port = PORT_FIBRE;
4907                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4908                 break;
4909         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4910                 link_info->port = PORT_FIBRE;
4911                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4912                 break;
4913         default:
4914                 link_info->port = PORT_OTHER;
4915                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4916                 break;
4917         }
4918
4919         return 0;
4920 }
4921
4922 static void qeth_init_link_info(struct qeth_card *card)
4923 {
4924         card->info.link_info.duplex = DUPLEX_FULL;
4925
4926         if (IS_IQD(card) || IS_VM_NIC(card)) {
4927                 card->info.link_info.speed = SPEED_10000;
4928                 card->info.link_info.port = PORT_FIBRE;
4929                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4930         } else {
4931                 switch (card->info.link_type) {
4932                 case QETH_LINK_TYPE_FAST_ETH:
4933                 case QETH_LINK_TYPE_LANE_ETH100:
4934                         card->info.link_info.speed = SPEED_100;
4935                         card->info.link_info.port = PORT_TP;
4936                         break;
4937                 case QETH_LINK_TYPE_GBIT_ETH:
4938                 case QETH_LINK_TYPE_LANE_ETH1000:
4939                         card->info.link_info.speed = SPEED_1000;
4940                         card->info.link_info.port = PORT_FIBRE;
4941                         break;
4942                 case QETH_LINK_TYPE_10GBIT_ETH:
4943                         card->info.link_info.speed = SPEED_10000;
4944                         card->info.link_info.port = PORT_FIBRE;
4945                         break;
4946                 case QETH_LINK_TYPE_25GBIT_ETH:
4947                         card->info.link_info.speed = SPEED_25000;
4948                         card->info.link_info.port = PORT_FIBRE;
4949                         break;
4950                 default:
4951                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
4952                                  card->info.link_type);
4953                         card->info.link_info.speed = SPEED_UNKNOWN;
4954                         card->info.link_info.port = PORT_OTHER;
4955                 }
4956
4957                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
4958         }
4959
4960         /* Get more accurate data via QUERY OAT: */
4961         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4962                 struct qeth_link_info link_info;
4963                 struct qeth_cmd_buffer *iob;
4964
4965                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4966                                            SETADP_DATA_SIZEOF(query_oat));
4967                 if (iob) {
4968                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4969                         struct qeth_query_oat *oat_req;
4970
4971                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4972                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4973
4974                         if (!qeth_send_ipa_cmd(card, iob,
4975                                                qeth_init_link_info_oat_cb,
4976                                                &link_info)) {
4977                                 if (link_info.speed != SPEED_UNKNOWN)
4978                                         card->info.link_info.speed = link_info.speed;
4979                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4980                                         card->info.link_info.duplex = link_info.duplex;
4981                                 if (link_info.port != PORT_OTHER)
4982                                         card->info.link_info.port = link_info.port;
4983                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4984                                         card->info.link_info.link_mode = link_info.link_mode;
4985                         }
4986                 }
4987         }
4988 }
4989
4990 /**
4991  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4992  * @card: pointer to a qeth_card
4993  *
4994  * Returns
4995  *      0, if a MAC address has been set for the card's netdevice
4996  *      a return code, for various error conditions
4997  */
4998 int qeth_vm_request_mac(struct qeth_card *card)
4999 {
5000         struct diag26c_mac_resp *response;
5001         struct diag26c_mac_req *request;
5002         int rc;
5003
5004         QETH_CARD_TEXT(card, 2, "vmreqmac");
5005
5006         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5007         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5008         if (!request || !response) {
5009                 rc = -ENOMEM;
5010                 goto out;
5011         }
5012
5013         request->resp_buf_len = sizeof(*response);
5014         request->resp_version = DIAG26C_VERSION2;
5015         request->op_code = DIAG26C_GET_MAC;
5016         request->devno = card->info.ddev_devno;
5017
5018         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5019         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5020         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5021         if (rc)
5022                 goto out;
5023         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5024
5025         if (request->resp_buf_len < sizeof(*response) ||
5026             response->version != request->resp_version) {
5027                 rc = -EIO;
5028                 QETH_CARD_TEXT(card, 2, "badresp");
5029                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5030                               sizeof(request->resp_buf_len));
5031         } else if (!is_valid_ether_addr(response->mac)) {
5032                 rc = -EINVAL;
5033                 QETH_CARD_TEXT(card, 2, "badmac");
5034                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5035         } else {
5036                 eth_hw_addr_set(card->dev, response->mac);
5037         }
5038
5039 out:
5040         kfree(response);
5041         kfree(request);
5042         return rc;
5043 }
5044 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5045
5046 static void qeth_determine_capabilities(struct qeth_card *card)
5047 {
5048         struct qeth_channel *channel = &card->data;
5049         struct ccw_device *ddev = channel->ccwdev;
5050         int rc;
5051         int ddev_offline = 0;
5052
5053         QETH_CARD_TEXT(card, 2, "detcapab");
5054         if (!ddev->online) {
5055                 ddev_offline = 1;
5056                 rc = qeth_start_channel(channel);
5057                 if (rc) {
5058                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5059                         goto out;
5060                 }
5061         }
5062
5063         rc = qeth_read_conf_data(card);
5064         if (rc) {
5065                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5066                                  CARD_DEVID(card), rc);
5067                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5068                 goto out_offline;
5069         }
5070
5071         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5072         if (rc)
5073                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5074
5075         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5076         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5077         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5078         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5079         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5080         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5081             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5082             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5083                 dev_info(&card->gdev->dev,
5084                         "Completion Queueing supported\n");
5085         } else {
5086                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5087         }
5088
5089 out_offline:
5090         if (ddev_offline == 1)
5091                 qeth_stop_channel(channel);
5092 out:
5093         return;
5094 }
5095
5096 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5097 {
5098         struct qeth_card_info *info = &card->info;
5099         struct ccw_device *cdev = CARD_DDEV(card);
5100         struct ccw_dev_id dev_id;
5101
5102         QETH_CARD_TEXT(card, 2, "ccwconfd");
5103         ccw_device_get_id(cdev, &dev_id);
5104
5105         info->ddev_devno = dev_id.devno;
5106         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5107                           !ccw_device_get_iid(cdev, &info->iid) &&
5108                           !ccw_device_get_chid(cdev, 0, &info->chid);
5109         info->ssid = dev_id.ssid;
5110
5111         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5112                  info->chid, info->chpid);
5113
5114         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5115         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5116         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5117         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5118         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5119         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5120         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5121 }
5122
5123 static int qeth_qdio_establish(struct qeth_card *card)
5124 {
5125         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5126         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5127         struct qeth_qib_parms *qib_parms = NULL;
5128         struct qdio_initialize init_data;
5129         unsigned int no_input_qs = 1;
5130         unsigned int i;
5131         int rc = 0;
5132
5133         QETH_CARD_TEXT(card, 2, "qdioest");
5134
5135         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5136                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5137                 if (!qib_parms)
5138                         return -ENOMEM;
5139
5140                 qeth_fill_qib_parms(card, qib_parms);
5141         }
5142
5143         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5144         if (card->options.cq == QETH_CQ_ENABLED) {
5145                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5146                 no_input_qs++;
5147         }
5148
5149         for (i = 0; i < card->qdio.no_out_queues; i++)
5150                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5151
5152         memset(&init_data, 0, sizeof(struct qdio_initialize));
5153         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5154                                                           QDIO_QETH_QFMT;
5155         init_data.qib_param_field_format = 0;
5156         init_data.qib_param_field        = (void *)qib_parms;
5157         init_data.no_input_qs            = no_input_qs;
5158         init_data.no_output_qs           = card->qdio.no_out_queues;
5159         init_data.input_handler          = qeth_qdio_input_handler;
5160         init_data.output_handler         = qeth_qdio_output_handler;
5161         init_data.irq_poll               = qeth_qdio_poll;
5162         init_data.int_parm               = (unsigned long) card;
5163         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5164         init_data.output_sbal_addr_array = out_sbal_ptrs;
5165
5166         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5167                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5168                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5169                                    init_data.no_output_qs);
5170                 if (rc) {
5171                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5172                         goto out;
5173                 }
5174                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5175                 if (rc) {
5176                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5177                         qdio_free(CARD_DDEV(card));
5178                 }
5179         }
5180
5181         switch (card->options.cq) {
5182         case QETH_CQ_ENABLED:
5183                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5184                 break;
5185         case QETH_CQ_DISABLED:
5186                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5187                 break;
5188         default:
5189                 break;
5190         }
5191
5192 out:
5193         kfree(qib_parms);
5194         return rc;
5195 }
5196
5197 static void qeth_core_free_card(struct qeth_card *card)
5198 {
5199         QETH_CARD_TEXT(card, 2, "freecrd");
5200
5201         unregister_service_level(&card->qeth_service_level);
5202         debugfs_remove_recursive(card->debugfs);
5203         qeth_put_cmd(card->read_cmd);
5204         destroy_workqueue(card->event_wq);
5205         dev_set_drvdata(&card->gdev->dev, NULL);
5206         kfree(card);
5207 }
5208
5209 static void qeth_trace_features(struct qeth_card *card)
5210 {
5211         QETH_CARD_TEXT(card, 2, "features");
5212         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5213         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5214         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5215         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5216                       sizeof(card->info.diagass_support));
5217 }
5218
5219 static struct ccw_device_id qeth_ids[] = {
5220         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5221                                         .driver_info = QETH_CARD_TYPE_OSD},
5222         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5223                                         .driver_info = QETH_CARD_TYPE_IQD},
5224         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5225                                         .driver_info = QETH_CARD_TYPE_OSM},
5226 #ifdef CONFIG_QETH_OSX
5227         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5228                                         .driver_info = QETH_CARD_TYPE_OSX},
5229 #endif
5230         {},
5231 };
5232 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5233
5234 static struct ccw_driver qeth_ccw_driver = {
5235         .driver = {
5236                 .owner = THIS_MODULE,
5237                 .name = "qeth",
5238         },
5239         .ids = qeth_ids,
5240         .probe = ccwgroup_probe_ccwdev,
5241         .remove = ccwgroup_remove_ccwdev,
5242 };
5243
5244 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5245 {
5246         int retries = 3;
5247         int rc;
5248
5249         QETH_CARD_TEXT(card, 2, "hrdsetup");
5250         atomic_set(&card->force_alloc_skb, 0);
5251         rc = qeth_update_from_chp_desc(card);
5252         if (rc)
5253                 return rc;
5254 retry:
5255         if (retries < 3)
5256                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5257                                  CARD_DEVID(card));
5258         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5259         qeth_stop_channel(&card->data);
5260         qeth_stop_channel(&card->write);
5261         qeth_stop_channel(&card->read);
5262         qdio_free(CARD_DDEV(card));
5263
5264         rc = qeth_start_channel(&card->read);
5265         if (rc)
5266                 goto retriable;
5267         rc = qeth_start_channel(&card->write);
5268         if (rc)
5269                 goto retriable;
5270         rc = qeth_start_channel(&card->data);
5271         if (rc)
5272                 goto retriable;
5273 retriable:
5274         if (rc == -ERESTARTSYS) {
5275                 QETH_CARD_TEXT(card, 2, "break1");
5276                 return rc;
5277         } else if (rc) {
5278                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5279                 if (--retries < 0)
5280                         goto out;
5281                 else
5282                         goto retry;
5283         }
5284
5285         qeth_determine_capabilities(card);
5286         qeth_read_ccw_conf_data(card);
5287         qeth_idx_init(card);
5288
5289         rc = qeth_idx_activate_read_channel(card);
5290         if (rc == -EINTR) {
5291                 QETH_CARD_TEXT(card, 2, "break2");
5292                 return rc;
5293         } else if (rc) {
5294                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5295                 if (--retries < 0)
5296                         goto out;
5297                 else
5298                         goto retry;
5299         }
5300
5301         rc = qeth_idx_activate_write_channel(card);
5302         if (rc == -EINTR) {
5303                 QETH_CARD_TEXT(card, 2, "break3");
5304                 return rc;
5305         } else if (rc) {
5306                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5307                 if (--retries < 0)
5308                         goto out;
5309                 else
5310                         goto retry;
5311         }
5312         card->read_or_write_problem = 0;
5313         rc = qeth_mpc_initialize(card);
5314         if (rc) {
5315                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5316                 goto out;
5317         }
5318
5319         rc = qeth_send_startlan(card);
5320         if (rc) {
5321                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5322                 if (rc == -ENETDOWN) {
5323                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5324                         *carrier_ok = false;
5325                 } else {
5326                         goto out;
5327                 }
5328         } else {
5329                 *carrier_ok = true;
5330         }
5331
5332         card->options.ipa4.supported = 0;
5333         card->options.ipa6.supported = 0;
5334         card->options.adp.supported = 0;
5335         card->options.sbp.supported_funcs = 0;
5336         card->info.diagass_support = 0;
5337         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5338         if (rc == -ENOMEM)
5339                 goto out;
5340         if (qeth_is_supported(card, IPA_IPV6)) {
5341                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5342                 if (rc == -ENOMEM)
5343                         goto out;
5344         }
5345         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5346                 rc = qeth_query_setadapterparms(card);
5347                 if (rc < 0) {
5348                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5349                         goto out;
5350                 }
5351         }
5352         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5353                 rc = qeth_query_setdiagass(card);
5354                 if (rc)
5355                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5356         }
5357
5358         qeth_trace_features(card);
5359
5360         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5361             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5362                 card->info.hwtrap = 0;
5363
5364         if (card->options.isolation != ISOLATION_MODE_NONE) {
5365                 rc = qeth_setadpparms_set_access_ctrl(card,
5366                                                       card->options.isolation);
5367                 if (rc)
5368                         goto out;
5369         }
5370
5371         qeth_init_link_info(card);
5372
5373         rc = qeth_init_qdio_queues(card);
5374         if (rc) {
5375                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5376                 goto out;
5377         }
5378
5379         return 0;
5380 out:
5381         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5382                 "an error on the device\n");
5383         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5384                          CARD_DEVID(card), rc);
5385         return rc;
5386 }
5387
5388 static int qeth_set_online(struct qeth_card *card,
5389                            const struct qeth_discipline *disc)
5390 {
5391         bool carrier_ok;
5392         int rc;
5393
5394         mutex_lock(&card->conf_mutex);
5395         QETH_CARD_TEXT(card, 2, "setonlin");
5396
5397         rc = qeth_hardsetup_card(card, &carrier_ok);
5398         if (rc) {
5399                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5400                 rc = -ENODEV;
5401                 goto err_hardsetup;
5402         }
5403
5404         qeth_print_status_message(card);
5405
5406         if (card->dev->reg_state != NETREG_REGISTERED)
5407                 /* no need for locking / error handling at this early stage: */
5408                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5409
5410         rc = disc->set_online(card, carrier_ok);
5411         if (rc)
5412                 goto err_online;
5413
5414         /* let user_space know that device is online */
5415         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5416
5417         mutex_unlock(&card->conf_mutex);
5418         return 0;
5419
5420 err_online:
5421 err_hardsetup:
5422         qeth_qdio_clear_card(card, 0);
5423         qeth_clear_working_pool_list(card);
5424         qeth_flush_local_addrs(card);
5425
5426         qeth_stop_channel(&card->data);
5427         qeth_stop_channel(&card->write);
5428         qeth_stop_channel(&card->read);
5429         qdio_free(CARD_DDEV(card));
5430
5431         mutex_unlock(&card->conf_mutex);
5432         return rc;
5433 }
5434
5435 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5436                      bool resetting)
5437 {
5438         int rc, rc2, rc3;
5439
5440         mutex_lock(&card->conf_mutex);
5441         QETH_CARD_TEXT(card, 3, "setoffl");
5442
5443         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5444                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5445                 card->info.hwtrap = 1;
5446         }
5447
5448         /* cancel any stalled cmd that might block the rtnl: */
5449         qeth_clear_ipacmd_list(card);
5450
5451         rtnl_lock();
5452         card->info.open_when_online = card->dev->flags & IFF_UP;
5453         dev_close(card->dev);
5454         netif_device_detach(card->dev);
5455         netif_carrier_off(card->dev);
5456         rtnl_unlock();
5457
5458         cancel_work_sync(&card->rx_mode_work);
5459
5460         disc->set_offline(card);
5461
5462         qeth_qdio_clear_card(card, 0);
5463         qeth_drain_output_queues(card);
5464         qeth_clear_working_pool_list(card);
5465         qeth_flush_local_addrs(card);
5466         card->info.promisc_mode = 0;
5467
5468         rc  = qeth_stop_channel(&card->data);
5469         rc2 = qeth_stop_channel(&card->write);
5470         rc3 = qeth_stop_channel(&card->read);
5471         if (!rc)
5472                 rc = (rc2) ? rc2 : rc3;
5473         if (rc)
5474                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5475         qdio_free(CARD_DDEV(card));
5476
5477         /* let user_space know that device is offline */
5478         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5479
5480         mutex_unlock(&card->conf_mutex);
5481         return 0;
5482 }
5483 EXPORT_SYMBOL_GPL(qeth_set_offline);
5484
5485 static int qeth_do_reset(void *data)
5486 {
5487         const struct qeth_discipline *disc;
5488         struct qeth_card *card = data;
5489         int rc;
5490
5491         /* Lock-free, other users will block until we are done. */
5492         disc = card->discipline;
5493
5494         QETH_CARD_TEXT(card, 2, "recover1");
5495         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5496                 return 0;
5497         QETH_CARD_TEXT(card, 2, "recover2");
5498         dev_warn(&card->gdev->dev,
5499                  "A recovery process has been started for the device\n");
5500
5501         qeth_set_offline(card, disc, true);
5502         rc = qeth_set_online(card, disc);
5503         if (!rc) {
5504                 dev_info(&card->gdev->dev,
5505                          "Device successfully recovered!\n");
5506         } else {
5507                 qeth_set_offline(card, disc, true);
5508                 ccwgroup_set_offline(card->gdev, false);
5509                 dev_warn(&card->gdev->dev,
5510                          "The qeth device driver failed to recover an error on the device\n");
5511         }
5512         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5513         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5514         return 0;
5515 }
5516
5517 #if IS_ENABLED(CONFIG_QETH_L3)
5518 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5519                                 struct qeth_hdr *hdr)
5520 {
5521         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5522         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5523         struct net_device *dev = skb->dev;
5524
5525         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5526                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5527                                 "FAKELL", skb->len);
5528                 return;
5529         }
5530
5531         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5532                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5533                                                              ETH_P_IP;
5534                 unsigned char tg_addr[ETH_ALEN];
5535
5536                 skb_reset_network_header(skb);
5537                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5538                 case QETH_CAST_MULTICAST:
5539                         if (prot == ETH_P_IP)
5540                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5541                         else
5542                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5543                         QETH_CARD_STAT_INC(card, rx_multicast);
5544                         break;
5545                 case QETH_CAST_BROADCAST:
5546                         ether_addr_copy(tg_addr, dev->broadcast);
5547                         QETH_CARD_STAT_INC(card, rx_multicast);
5548                         break;
5549                 default:
5550                         if (card->options.sniffer)
5551                                 skb->pkt_type = PACKET_OTHERHOST;
5552                         ether_addr_copy(tg_addr, dev->dev_addr);
5553                 }
5554
5555                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5556                         dev_hard_header(skb, dev, prot, tg_addr,
5557                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5558                 else
5559                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5560                                         skb->len);
5561         }
5562
5563         /* copy VLAN tag from hdr into skb */
5564         if (!card->options.sniffer &&
5565             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5566                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5567                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5568                                 l3_hdr->vlan_id :
5569                                 l3_hdr->next_hop.rx.vlan_id;
5570
5571                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5572         }
5573 }
5574 #endif
5575
5576 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5577                              bool uses_frags, bool is_cso)
5578 {
5579         struct napi_struct *napi = &card->napi;
5580
5581         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5582                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5583                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5584         } else {
5585                 skb->ip_summed = CHECKSUM_NONE;
5586         }
5587
5588         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5589         QETH_CARD_STAT_INC(card, rx_packets);
5590         if (skb_is_nonlinear(skb)) {
5591                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5592                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5593                                    skb_shinfo(skb)->nr_frags);
5594         }
5595
5596         if (uses_frags) {
5597                 napi_gro_frags(napi);
5598         } else {
5599                 skb->protocol = eth_type_trans(skb, skb->dev);
5600                 napi_gro_receive(napi, skb);
5601         }
5602 }
5603
5604 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5605 {
5606         struct page *page = virt_to_page(data);
5607         unsigned int next_frag;
5608
5609         next_frag = skb_shinfo(skb)->nr_frags;
5610         get_page(page);
5611         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5612                         data_len);
5613 }
5614
5615 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5616 {
5617         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5618 }
5619
5620 static int qeth_extract_skb(struct qeth_card *card,
5621                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5622                             int *__offset)
5623 {
5624         struct qeth_priv *priv = netdev_priv(card->dev);
5625         struct qdio_buffer *buffer = qethbuffer->buffer;
5626         struct napi_struct *napi = &card->napi;
5627         struct qdio_buffer_element *element;
5628         unsigned int linear_len = 0;
5629         bool uses_frags = false;
5630         int offset = *__offset;
5631         bool use_rx_sg = false;
5632         unsigned int headroom;
5633         struct qeth_hdr *hdr;
5634         struct sk_buff *skb;
5635         int skb_len = 0;
5636         bool is_cso;
5637
5638         element = &buffer->element[*element_no];
5639
5640 next_packet:
5641         /* qeth_hdr must not cross element boundaries */
5642         while (element->length < offset + sizeof(struct qeth_hdr)) {
5643                 if (qeth_is_last_sbale(element))
5644                         return -ENODATA;
5645                 element++;
5646                 offset = 0;
5647         }
5648
5649         hdr = phys_to_virt(element->addr) + offset;
5650         offset += sizeof(*hdr);
5651         skb = NULL;
5652
5653         switch (hdr->hdr.l2.id) {
5654         case QETH_HEADER_TYPE_LAYER2:
5655                 skb_len = hdr->hdr.l2.pkt_length;
5656                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5657
5658                 linear_len = ETH_HLEN;
5659                 headroom = 0;
5660                 break;
5661         case QETH_HEADER_TYPE_LAYER3:
5662                 skb_len = hdr->hdr.l3.length;
5663                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5664
5665                 if (!IS_LAYER3(card)) {
5666                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5667                         goto walk_packet;
5668                 }
5669
5670                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5671                         linear_len = ETH_HLEN;
5672                         headroom = 0;
5673                         break;
5674                 }
5675
5676                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5677                         linear_len = sizeof(struct ipv6hdr);
5678                 else
5679                         linear_len = sizeof(struct iphdr);
5680                 headroom = ETH_HLEN;
5681                 break;
5682         default:
5683                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5684                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5685                 else
5686                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5687
5688                 /* Can't determine packet length, drop the whole buffer. */
5689                 return -EPROTONOSUPPORT;
5690         }
5691
5692         if (skb_len < linear_len) {
5693                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5694                 goto walk_packet;
5695         }
5696
5697         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5698                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5699                      !atomic_read(&card->force_alloc_skb));
5700
5701         if (use_rx_sg) {
5702                 /* QETH_CQ_ENABLED only: */
5703                 if (qethbuffer->rx_skb &&
5704                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5705                         skb = qethbuffer->rx_skb;
5706                         qethbuffer->rx_skb = NULL;
5707                         goto use_skb;
5708                 }
5709
5710                 skb = napi_get_frags(napi);
5711                 if (!skb) {
5712                         /* -ENOMEM, no point in falling back further. */
5713                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5714                         goto walk_packet;
5715                 }
5716
5717                 if (skb_tailroom(skb) >= linear_len + headroom) {
5718                         uses_frags = true;
5719                         goto use_skb;
5720                 }
5721
5722                 netdev_info_once(card->dev,
5723                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5724                                  linear_len + headroom, skb_tailroom(skb));
5725                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5726         }
5727
5728         linear_len = skb_len;
5729         skb = napi_alloc_skb(napi, linear_len + headroom);
5730         if (!skb) {
5731                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5732                 goto walk_packet;
5733         }
5734
5735 use_skb:
5736         if (headroom)
5737                 skb_reserve(skb, headroom);
5738 walk_packet:
5739         while (skb_len) {
5740                 int data_len = min(skb_len, (int)(element->length - offset));
5741                 char *data = phys_to_virt(element->addr) + offset;
5742
5743                 skb_len -= data_len;
5744                 offset += data_len;
5745
5746                 /* Extract data from current element: */
5747                 if (skb && data_len) {
5748                         if (linear_len) {
5749                                 unsigned int copy_len;
5750
5751                                 copy_len = min_t(unsigned int, linear_len,
5752                                                  data_len);
5753
5754                                 skb_put_data(skb, data, copy_len);
5755                                 linear_len -= copy_len;
5756                                 data_len -= copy_len;
5757                                 data += copy_len;
5758                         }
5759
5760                         if (data_len)
5761                                 qeth_create_skb_frag(skb, data, data_len);
5762                 }
5763
5764                 /* Step forward to next element: */
5765                 if (skb_len) {
5766                         if (qeth_is_last_sbale(element)) {
5767                                 QETH_CARD_TEXT(card, 4, "unexeob");
5768                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5769                                 if (skb) {
5770                                         if (uses_frags)
5771                                                 napi_free_frags(napi);
5772                                         else
5773                                                 kfree_skb(skb);
5774                                         QETH_CARD_STAT_INC(card,
5775                                                            rx_length_errors);
5776                                 }
5777                                 return -EMSGSIZE;
5778                         }
5779                         element++;
5780                         offset = 0;
5781                 }
5782         }
5783
5784         /* This packet was skipped, go get another one: */
5785         if (!skb)
5786                 goto next_packet;
5787
5788         *element_no = element - &buffer->element[0];
5789         *__offset = offset;
5790
5791 #if IS_ENABLED(CONFIG_QETH_L3)
5792         if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5793                 qeth_l3_rebuild_skb(card, skb, hdr);
5794 #endif
5795
5796         qeth_receive_skb(card, skb, uses_frags, is_cso);
5797         return 0;
5798 }
5799
5800 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5801                                       struct qeth_qdio_buffer *buf, bool *done)
5802 {
5803         unsigned int work_done = 0;
5804
5805         while (budget) {
5806                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5807                                      &card->rx.e_offset)) {
5808                         *done = true;
5809                         break;
5810                 }
5811
5812                 work_done++;
5813                 budget--;
5814         }
5815
5816         return work_done;
5817 }
5818
5819 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5820 {
5821         struct qeth_rx *ctx = &card->rx;
5822         unsigned int work_done = 0;
5823
5824         while (budget > 0) {
5825                 struct qeth_qdio_buffer *buffer;
5826                 unsigned int skbs_done = 0;
5827                 bool done = false;
5828
5829                 /* Fetch completed RX buffers: */
5830                 if (!card->rx.b_count) {
5831                         card->rx.qdio_err = 0;
5832                         card->rx.b_count = qdio_inspect_queue(CARD_DDEV(card),
5833                                                               0, true,
5834                                                               &card->rx.b_index,
5835                                                               &card->rx.qdio_err);
5836                         if (card->rx.b_count <= 0) {
5837                                 card->rx.b_count = 0;
5838                                 break;
5839                         }
5840                 }
5841
5842                 /* Process one completed RX buffer: */
5843                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5844                 if (!(card->rx.qdio_err &&
5845                       qeth_check_qdio_errors(card, buffer->buffer,
5846                                              card->rx.qdio_err, "qinerr")))
5847                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5848                                                       &done);
5849                 else
5850                         done = true;
5851
5852                 work_done += skbs_done;
5853                 budget -= skbs_done;
5854
5855                 if (done) {
5856                         QETH_CARD_STAT_INC(card, rx_bufs);
5857                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5858                         buffer->pool_entry = NULL;
5859                         card->rx.b_count--;
5860                         ctx->bufs_refill++;
5861                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5862                                                                  ctx->bufs_refill);
5863
5864                         /* Step forward to next buffer: */
5865                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5866                         card->rx.buf_element = 0;
5867                         card->rx.e_offset = 0;
5868                 }
5869         }
5870
5871         return work_done;
5872 }
5873
5874 static void qeth_cq_poll(struct qeth_card *card)
5875 {
5876         unsigned int work_done = 0;
5877
5878         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5879                 unsigned int start, error;
5880                 int completed;
5881
5882                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5883                                                &error);
5884                 if (completed <= 0)
5885                         return;
5886
5887                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5888                 work_done += completed;
5889         }
5890 }
5891
5892 int qeth_poll(struct napi_struct *napi, int budget)
5893 {
5894         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5895         unsigned int work_done;
5896
5897         work_done = qeth_rx_poll(card, budget);
5898
5899         if (qeth_use_tx_irqs(card)) {
5900                 struct qeth_qdio_out_q *queue;
5901                 unsigned int i;
5902
5903                 qeth_for_each_output_queue(card, queue, i) {
5904                         if (!qeth_out_queue_is_empty(queue))
5905                                 napi_schedule(&queue->napi);
5906                 }
5907         }
5908
5909         if (card->options.cq == QETH_CQ_ENABLED)
5910                 qeth_cq_poll(card);
5911
5912         if (budget) {
5913                 struct qeth_rx *ctx = &card->rx;
5914
5915                 /* Process any substantial refill backlog: */
5916                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5917
5918                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5919                 if (work_done >= budget)
5920                         return work_done;
5921         }
5922
5923         if (napi_complete_done(napi, work_done) &&
5924             qdio_start_irq(CARD_DDEV(card)))
5925                 napi_schedule(napi);
5926
5927         return work_done;
5928 }
5929 EXPORT_SYMBOL_GPL(qeth_poll);
5930
5931 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5932                                  unsigned int bidx, unsigned int qdio_error,
5933                                  int budget)
5934 {
5935         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5936         u8 sflags = buffer->buffer->element[15].sflags;
5937         struct qeth_card *card = queue->card;
5938         bool error = !!qdio_error;
5939
5940         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5941                 struct qaob *aob = buffer->aob;
5942                 struct qeth_qaob_priv1 *priv;
5943                 enum iucv_tx_notify notify;
5944
5945                 if (!aob) {
5946                         netdev_WARN_ONCE(card->dev,
5947                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5948                                          bidx, queue->queue_no);
5949                         qeth_schedule_recovery(card);
5950                         return;
5951                 }
5952
5953                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5954
5955                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5956                 /* QAOB hasn't completed yet: */
5957                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5958                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5959
5960                         /* Prepare the queue slot for immediate re-use: */
5961                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5962                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5963                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5964                                 qeth_schedule_recovery(card);
5965                         }
5966
5967                         list_add(&buffer->list_entry, &queue->pending_bufs);
5968                         /* Skip clearing the buffer: */
5969                         return;
5970                 }
5971
5972                 /* QAOB already completed: */
5973                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5974                 qeth_notify_skbs(queue, buffer, notify);
5975                 error = !!aob->aorc;
5976                 memset(aob, 0, sizeof(*aob));
5977         } else if (card->options.cq == QETH_CQ_ENABLED) {
5978                 qeth_notify_skbs(queue, buffer,
5979                                  qeth_compute_cq_notification(sflags, 0));
5980         }
5981
5982         qeth_clear_output_buffer(queue, buffer, error, budget);
5983 }
5984
5985 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5986 {
5987         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5988         unsigned int queue_no = queue->queue_no;
5989         struct qeth_card *card = queue->card;
5990         struct net_device *dev = card->dev;
5991         unsigned int work_done = 0;
5992         struct netdev_queue *txq;
5993
5994         if (IS_IQD(card))
5995                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5996         else
5997                 txq = netdev_get_tx_queue(dev, queue_no);
5998
5999         while (1) {
6000                 unsigned int start, error, i;
6001                 unsigned int packets = 0;
6002                 unsigned int bytes = 0;
6003                 int completed;
6004
6005                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6006
6007                 if (qeth_out_queue_is_empty(queue)) {
6008                         napi_complete(napi);
6009                         return 0;
6010                 }
6011
6012                 /* Give the CPU a breather: */
6013                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6014                         QETH_TXQ_STAT_INC(queue, completion_yield);
6015                         if (napi_complete_done(napi, 0))
6016                                 napi_schedule(napi);
6017                         return 0;
6018                 }
6019
6020                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6021                                                &start, &error);
6022                 if (completed <= 0) {
6023                         /* Ensure we see TX completion for pending work: */
6024                         if (napi_complete_done(napi, 0) &&
6025                             !atomic_read(&queue->set_pci_flags_count))
6026                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
6027                         return 0;
6028                 }
6029
6030                 for (i = start; i < start + completed; i++) {
6031                         struct qeth_qdio_out_buffer *buffer;
6032                         unsigned int bidx = QDIO_BUFNR(i);
6033
6034                         buffer = queue->bufs[bidx];
6035                         packets += buffer->frames;
6036                         bytes += buffer->bytes;
6037
6038                         qeth_handle_send_error(card, buffer, error);
6039                         if (IS_IQD(card))
6040                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
6041                         else
6042                                 qeth_clear_output_buffer(queue, buffer, error,
6043                                                          budget);
6044                 }
6045
6046                 atomic_sub(completed, &queue->used_buffers);
6047                 work_done += completed;
6048                 if (IS_IQD(card))
6049                         netdev_tx_completed_queue(txq, packets, bytes);
6050                 else
6051                         qeth_check_outbound_queue(queue);
6052
6053                 /* xmit may have observed the full-condition, but not yet
6054                  * stopped the txq. In which case the code below won't trigger.
6055                  * So before returning, xmit will re-check the txq's fill level
6056                  * and wake it up if needed.
6057                  */
6058                 if (netif_tx_queue_stopped(txq) &&
6059                     !qeth_out_queue_is_full(queue))
6060                         netif_tx_wake_queue(txq);
6061         }
6062 }
6063
6064 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6065 {
6066         if (!cmd->hdr.return_code)
6067                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6068         return cmd->hdr.return_code;
6069 }
6070
6071 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6072                                         struct qeth_reply *reply,
6073                                         unsigned long data)
6074 {
6075         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6076         struct qeth_ipa_caps *caps = reply->param;
6077
6078         if (qeth_setassparms_inspect_rc(cmd))
6079                 return -EIO;
6080
6081         caps->supported = cmd->data.setassparms.data.caps.supported;
6082         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6083         return 0;
6084 }
6085
6086 int qeth_setassparms_cb(struct qeth_card *card,
6087                         struct qeth_reply *reply, unsigned long data)
6088 {
6089         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6090
6091         QETH_CARD_TEXT(card, 4, "defadpcb");
6092
6093         if (cmd->hdr.return_code)
6094                 return -EIO;
6095
6096         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6097         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6098                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6099         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6100                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6101         return 0;
6102 }
6103 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6104
6105 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6106                                                  enum qeth_ipa_funcs ipa_func,
6107                                                  u16 cmd_code,
6108                                                  unsigned int data_length,
6109                                                  enum qeth_prot_versions prot)
6110 {
6111         struct qeth_ipacmd_setassparms *setassparms;
6112         struct qeth_ipacmd_setassparms_hdr *hdr;
6113         struct qeth_cmd_buffer *iob;
6114
6115         QETH_CARD_TEXT(card, 4, "getasscm");
6116         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6117                                  data_length +
6118                                  offsetof(struct qeth_ipacmd_setassparms,
6119                                           data));
6120         if (!iob)
6121                 return NULL;
6122
6123         setassparms = &__ipa_cmd(iob)->data.setassparms;
6124         setassparms->assist_no = ipa_func;
6125
6126         hdr = &setassparms->hdr;
6127         hdr->length = sizeof(*hdr) + data_length;
6128         hdr->command_code = cmd_code;
6129         return iob;
6130 }
6131 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6132
6133 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6134                                       enum qeth_ipa_funcs ipa_func,
6135                                       u16 cmd_code, u32 *data,
6136                                       enum qeth_prot_versions prot)
6137 {
6138         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6139         struct qeth_cmd_buffer *iob;
6140
6141         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6142         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6143         if (!iob)
6144                 return -ENOMEM;
6145
6146         if (data)
6147                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6148         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6149 }
6150 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6151
6152 static void qeth_unregister_dbf_views(void)
6153 {
6154         int x;
6155
6156         for (x = 0; x < QETH_DBF_INFOS; x++) {
6157                 debug_unregister(qeth_dbf[x].id);
6158                 qeth_dbf[x].id = NULL;
6159         }
6160 }
6161
6162 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6163 {
6164         char dbf_txt_buf[32];
6165         va_list args;
6166
6167         if (!debug_level_enabled(id, level))
6168                 return;
6169         va_start(args, fmt);
6170         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6171         va_end(args);
6172         debug_text_event(id, level, dbf_txt_buf);
6173 }
6174 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6175
6176 static int qeth_register_dbf_views(void)
6177 {
6178         int ret;
6179         int x;
6180
6181         for (x = 0; x < QETH_DBF_INFOS; x++) {
6182                 /* register the areas */
6183                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6184                                                 qeth_dbf[x].pages,
6185                                                 qeth_dbf[x].areas,
6186                                                 qeth_dbf[x].len);
6187                 if (qeth_dbf[x].id == NULL) {
6188                         qeth_unregister_dbf_views();
6189                         return -ENOMEM;
6190                 }
6191
6192                 /* register a view */
6193                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6194                 if (ret) {
6195                         qeth_unregister_dbf_views();
6196                         return ret;
6197                 }
6198
6199                 /* set a passing level */
6200                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6201         }
6202
6203         return 0;
6204 }
6205
6206 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6207
6208 int qeth_setup_discipline(struct qeth_card *card,
6209                           enum qeth_discipline_id discipline)
6210 {
6211         int rc;
6212
6213         mutex_lock(&qeth_mod_mutex);
6214         switch (discipline) {
6215         case QETH_DISCIPLINE_LAYER3:
6216                 card->discipline = try_then_request_module(
6217                         symbol_get(qeth_l3_discipline), "qeth_l3");
6218                 break;
6219         case QETH_DISCIPLINE_LAYER2:
6220                 card->discipline = try_then_request_module(
6221                         symbol_get(qeth_l2_discipline), "qeth_l2");
6222                 break;
6223         default:
6224                 break;
6225         }
6226         mutex_unlock(&qeth_mod_mutex);
6227
6228         if (!card->discipline) {
6229                 dev_err(&card->gdev->dev, "There is no kernel module to "
6230                         "support discipline %d\n", discipline);
6231                 return -EINVAL;
6232         }
6233
6234         rc = card->discipline->setup(card->gdev);
6235         if (rc) {
6236                 if (discipline == QETH_DISCIPLINE_LAYER2)
6237                         symbol_put(qeth_l2_discipline);
6238                 else
6239                         symbol_put(qeth_l3_discipline);
6240                 card->discipline = NULL;
6241
6242                 return rc;
6243         }
6244
6245         card->options.layer = discipline;
6246         return 0;
6247 }
6248
6249 void qeth_remove_discipline(struct qeth_card *card)
6250 {
6251         card->discipline->remove(card->gdev);
6252
6253         if (IS_LAYER2(card))
6254                 symbol_put(qeth_l2_discipline);
6255         else
6256                 symbol_put(qeth_l3_discipline);
6257         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6258         card->discipline = NULL;
6259 }
6260
6261 static const struct device_type qeth_generic_devtype = {
6262         .name = "qeth_generic",
6263 };
6264
6265 #define DBF_NAME_LEN    20
6266
6267 struct qeth_dbf_entry {
6268         char dbf_name[DBF_NAME_LEN];
6269         debug_info_t *dbf_info;
6270         struct list_head dbf_list;
6271 };
6272
6273 static LIST_HEAD(qeth_dbf_list);
6274 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6275
6276 static debug_info_t *qeth_get_dbf_entry(char *name)
6277 {
6278         struct qeth_dbf_entry *entry;
6279         debug_info_t *rc = NULL;
6280
6281         mutex_lock(&qeth_dbf_list_mutex);
6282         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6283                 if (strcmp(entry->dbf_name, name) == 0) {
6284                         rc = entry->dbf_info;
6285                         break;
6286                 }
6287         }
6288         mutex_unlock(&qeth_dbf_list_mutex);
6289         return rc;
6290 }
6291
6292 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6293 {
6294         struct qeth_dbf_entry *new_entry;
6295
6296         card->debug = debug_register(name, 2, 1, 8);
6297         if (!card->debug) {
6298                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6299                 goto err;
6300         }
6301         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6302                 goto err_dbg;
6303         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6304         if (!new_entry)
6305                 goto err_dbg;
6306         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6307         new_entry->dbf_info = card->debug;
6308         mutex_lock(&qeth_dbf_list_mutex);
6309         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6310         mutex_unlock(&qeth_dbf_list_mutex);
6311
6312         return 0;
6313
6314 err_dbg:
6315         debug_unregister(card->debug);
6316 err:
6317         return -ENOMEM;
6318 }
6319
6320 static void qeth_clear_dbf_list(void)
6321 {
6322         struct qeth_dbf_entry *entry, *tmp;
6323
6324         mutex_lock(&qeth_dbf_list_mutex);
6325         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6326                 list_del(&entry->dbf_list);
6327                 debug_unregister(entry->dbf_info);
6328                 kfree(entry);
6329         }
6330         mutex_unlock(&qeth_dbf_list_mutex);
6331 }
6332
6333 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6334 {
6335         struct net_device *dev;
6336         struct qeth_priv *priv;
6337
6338         switch (card->info.type) {
6339         case QETH_CARD_TYPE_IQD:
6340                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6341                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6342                 break;
6343         case QETH_CARD_TYPE_OSM:
6344                 dev = alloc_etherdev(sizeof(*priv));
6345                 break;
6346         default:
6347                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6348         }
6349
6350         if (!dev)
6351                 return NULL;
6352
6353         priv = netdev_priv(dev);
6354         priv->rx_copybreak = QETH_RX_COPYBREAK;
6355         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6356
6357         dev->ml_priv = card;
6358         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6359         dev->min_mtu = 576;
6360          /* initialized when device first goes online: */
6361         dev->max_mtu = 0;
6362         dev->mtu = 0;
6363         SET_NETDEV_DEV(dev, &card->gdev->dev);
6364         netif_carrier_off(dev);
6365
6366         dev->ethtool_ops = &qeth_ethtool_ops;
6367         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6368         dev->hw_features |= NETIF_F_SG;
6369         dev->vlan_features |= NETIF_F_SG;
6370         if (IS_IQD(card))
6371                 dev->features |= NETIF_F_SG;
6372
6373         return dev;
6374 }
6375
6376 struct net_device *qeth_clone_netdev(struct net_device *orig)
6377 {
6378         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6379
6380         if (!clone)
6381                 return NULL;
6382
6383         clone->dev_port = orig->dev_port;
6384         return clone;
6385 }
6386
6387 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6388 {
6389         struct qeth_card *card;
6390         struct device *dev;
6391         int rc;
6392         enum qeth_discipline_id enforced_disc;
6393         char dbf_name[DBF_NAME_LEN];
6394
6395         QETH_DBF_TEXT(SETUP, 2, "probedev");
6396
6397         dev = &gdev->dev;
6398         if (!get_device(dev))
6399                 return -ENODEV;
6400
6401         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6402
6403         card = qeth_alloc_card(gdev);
6404         if (!card) {
6405                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6406                 rc = -ENOMEM;
6407                 goto err_dev;
6408         }
6409
6410         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6411                 dev_name(&gdev->dev));
6412         card->debug = qeth_get_dbf_entry(dbf_name);
6413         if (!card->debug) {
6414                 rc = qeth_add_dbf_entry(card, dbf_name);
6415                 if (rc)
6416                         goto err_card;
6417         }
6418
6419         qeth_setup_card(card);
6420         card->dev = qeth_alloc_netdev(card);
6421         if (!card->dev) {
6422                 rc = -ENOMEM;
6423                 goto err_card;
6424         }
6425
6426         qeth_determine_capabilities(card);
6427         qeth_set_blkt_defaults(card);
6428
6429         card->qdio.in_q = qeth_alloc_qdio_queue();
6430         if (!card->qdio.in_q) {
6431                 rc = -ENOMEM;
6432                 goto err_rx_queue;
6433         }
6434
6435         card->qdio.no_out_queues = card->dev->num_tx_queues;
6436         rc = qeth_update_from_chp_desc(card);
6437         if (rc)
6438                 goto err_chp_desc;
6439
6440         gdev->dev.groups = qeth_dev_groups;
6441
6442         enforced_disc = qeth_enforce_discipline(card);
6443         switch (enforced_disc) {
6444         case QETH_DISCIPLINE_UNDETERMINED:
6445                 gdev->dev.type = &qeth_generic_devtype;
6446                 break;
6447         default:
6448                 card->info.layer_enforced = true;
6449                 /* It's so early that we don't need the discipline_mutex yet. */
6450                 rc = qeth_setup_discipline(card, enforced_disc);
6451                 if (rc)
6452                         goto err_setup_disc;
6453
6454                 break;
6455         }
6456
6457         return 0;
6458
6459 err_setup_disc:
6460 err_chp_desc:
6461         qeth_free_qdio_queue(card->qdio.in_q);
6462 err_rx_queue:
6463         free_netdev(card->dev);
6464 err_card:
6465         qeth_core_free_card(card);
6466 err_dev:
6467         put_device(dev);
6468         return rc;
6469 }
6470
6471 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6472 {
6473         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6474
6475         QETH_CARD_TEXT(card, 2, "removedv");
6476
6477         mutex_lock(&card->discipline_mutex);
6478         if (card->discipline)
6479                 qeth_remove_discipline(card);
6480         mutex_unlock(&card->discipline_mutex);
6481
6482         qeth_free_qdio_queues(card);
6483
6484         qeth_free_qdio_queue(card->qdio.in_q);
6485         free_netdev(card->dev);
6486         qeth_core_free_card(card);
6487         put_device(&gdev->dev);
6488 }
6489
6490 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6491 {
6492         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6493         int rc = 0;
6494         enum qeth_discipline_id def_discipline;
6495
6496         mutex_lock(&card->discipline_mutex);
6497         if (!card->discipline) {
6498                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6499                                                 QETH_DISCIPLINE_LAYER2;
6500                 rc = qeth_setup_discipline(card, def_discipline);
6501                 if (rc)
6502                         goto err;
6503         }
6504
6505         rc = qeth_set_online(card, card->discipline);
6506
6507 err:
6508         mutex_unlock(&card->discipline_mutex);
6509         return rc;
6510 }
6511
6512 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6513 {
6514         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6515         int rc;
6516
6517         mutex_lock(&card->discipline_mutex);
6518         rc = qeth_set_offline(card, card->discipline, false);
6519         mutex_unlock(&card->discipline_mutex);
6520
6521         return rc;
6522 }
6523
6524 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6525 {
6526         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6527
6528         qeth_set_allowed_threads(card, 0, 1);
6529         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6530                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6531         qeth_qdio_clear_card(card, 0);
6532         qeth_drain_output_queues(card);
6533         qdio_free(CARD_DDEV(card));
6534 }
6535
6536 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6537                            size_t count)
6538 {
6539         int err;
6540
6541         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6542                                   buf);
6543
6544         return err ? err : count;
6545 }
6546 static DRIVER_ATTR_WO(group);
6547
6548 static struct attribute *qeth_drv_attrs[] = {
6549         &driver_attr_group.attr,
6550         NULL,
6551 };
6552 static struct attribute_group qeth_drv_attr_group = {
6553         .attrs = qeth_drv_attrs,
6554 };
6555 static const struct attribute_group *qeth_drv_attr_groups[] = {
6556         &qeth_drv_attr_group,
6557         NULL,
6558 };
6559
6560 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6561         .driver = {
6562                 .groups = qeth_drv_attr_groups,
6563                 .owner = THIS_MODULE,
6564                 .name = "qeth",
6565         },
6566         .ccw_driver = &qeth_ccw_driver,
6567         .setup = qeth_core_probe_device,
6568         .remove = qeth_core_remove_device,
6569         .set_online = qeth_core_set_online,
6570         .set_offline = qeth_core_set_offline,
6571         .shutdown = qeth_core_shutdown,
6572 };
6573
6574 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6575 {
6576         struct qeth_card *card = dev->ml_priv;
6577         int rc = 0;
6578
6579         switch (cmd) {
6580         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6581                 rc = qeth_snmp_command(card, data);
6582                 break;
6583         case SIOC_QETH_GET_CARD_TYPE:
6584                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6585                     !IS_VM_NIC(card))
6586                         return 1;
6587                 return 0;
6588         case SIOC_QETH_QUERY_OAT:
6589                 rc = qeth_query_oat_command(card, data);
6590                 break;
6591         default:
6592                 rc = -EOPNOTSUPP;
6593         }
6594         if (rc)
6595                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6596         return rc;
6597 }
6598 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6599
6600 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6601 {
6602         struct qeth_card *card = dev->ml_priv;
6603         struct mii_ioctl_data *mii_data;
6604         int rc = 0;
6605
6606         switch (cmd) {
6607         case SIOCGMIIPHY:
6608                 mii_data = if_mii(rq);
6609                 mii_data->phy_id = 0;
6610                 break;
6611         case SIOCGMIIREG:
6612                 mii_data = if_mii(rq);
6613                 if (mii_data->phy_id != 0)
6614                         rc = -EINVAL;
6615                 else
6616                         mii_data->val_out = qeth_mdio_read(dev,
6617                                 mii_data->phy_id, mii_data->reg_num);
6618                 break;
6619         default:
6620                 return -EOPNOTSUPP;
6621         }
6622         if (rc)
6623                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6624         return rc;
6625 }
6626 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6627
6628 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6629                               unsigned long data)
6630 {
6631         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6632         u32 *features = reply->param;
6633
6634         if (qeth_setassparms_inspect_rc(cmd))
6635                 return -EIO;
6636
6637         *features = cmd->data.setassparms.data.flags_32bit;
6638         return 0;
6639 }
6640
6641 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6642                              enum qeth_prot_versions prot)
6643 {
6644         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6645                                                  NULL, prot);
6646 }
6647
6648 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6649                             enum qeth_prot_versions prot, u8 *lp2lp)
6650 {
6651         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6652         struct qeth_cmd_buffer *iob;
6653         struct qeth_ipa_caps caps;
6654         u32 features;
6655         int rc;
6656
6657         /* some L3 HW requires combined L3+L4 csum offload: */
6658         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6659             cstype == IPA_OUTBOUND_CHECKSUM)
6660                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6661
6662         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6663                                        prot);
6664         if (!iob)
6665                 return -ENOMEM;
6666
6667         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6668         if (rc)
6669                 return rc;
6670
6671         if ((required_features & features) != required_features) {
6672                 qeth_set_csum_off(card, cstype, prot);
6673                 return -EOPNOTSUPP;
6674         }
6675
6676         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6677                                        SETASS_DATA_SIZEOF(flags_32bit),
6678                                        prot);
6679         if (!iob) {
6680                 qeth_set_csum_off(card, cstype, prot);
6681                 return -ENOMEM;
6682         }
6683
6684         if (features & QETH_IPA_CHECKSUM_LP2LP)
6685                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6686         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6687         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6688         if (rc) {
6689                 qeth_set_csum_off(card, cstype, prot);
6690                 return rc;
6691         }
6692
6693         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6694             !qeth_ipa_caps_enabled(&caps, required_features)) {
6695                 qeth_set_csum_off(card, cstype, prot);
6696                 return -EOPNOTSUPP;
6697         }
6698
6699         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6700                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6701
6702         if (lp2lp)
6703                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6704
6705         return 0;
6706 }
6707
6708 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6709                              enum qeth_prot_versions prot, u8 *lp2lp)
6710 {
6711         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6712                     qeth_set_csum_off(card, cstype, prot);
6713 }
6714
6715 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6716                              unsigned long data)
6717 {
6718         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6719         struct qeth_tso_start_data *tso_data = reply->param;
6720
6721         if (qeth_setassparms_inspect_rc(cmd))
6722                 return -EIO;
6723
6724         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6725         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6726         return 0;
6727 }
6728
6729 static int qeth_set_tso_off(struct qeth_card *card,
6730                             enum qeth_prot_versions prot)
6731 {
6732         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6733                                                  IPA_CMD_ASS_STOP, NULL, prot);
6734 }
6735
6736 static int qeth_set_tso_on(struct qeth_card *card,
6737                            enum qeth_prot_versions prot)
6738 {
6739         struct qeth_tso_start_data tso_data;
6740         struct qeth_cmd_buffer *iob;
6741         struct qeth_ipa_caps caps;
6742         int rc;
6743
6744         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6745                                        IPA_CMD_ASS_START, 0, prot);
6746         if (!iob)
6747                 return -ENOMEM;
6748
6749         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6750         if (rc)
6751                 return rc;
6752
6753         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6754                 qeth_set_tso_off(card, prot);
6755                 return -EOPNOTSUPP;
6756         }
6757
6758         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6759                                        IPA_CMD_ASS_ENABLE,
6760                                        SETASS_DATA_SIZEOF(caps), prot);
6761         if (!iob) {
6762                 qeth_set_tso_off(card, prot);
6763                 return -ENOMEM;
6764         }
6765
6766         /* enable TSO capability */
6767         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6768                 QETH_IPA_LARGE_SEND_TCP;
6769         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6770         if (rc) {
6771                 qeth_set_tso_off(card, prot);
6772                 return rc;
6773         }
6774
6775         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6776             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6777                 qeth_set_tso_off(card, prot);
6778                 return -EOPNOTSUPP;
6779         }
6780
6781         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6782                  tso_data.mss);
6783         return 0;
6784 }
6785
6786 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6787                             enum qeth_prot_versions prot)
6788 {
6789         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6790 }
6791
6792 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6793 {
6794         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6795         int rc_ipv6;
6796
6797         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6798                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6799                                             QETH_PROT_IPV4, NULL);
6800         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6801                 /* no/one Offload Assist available, so the rc is trivial */
6802                 return rc_ipv4;
6803
6804         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6805                                     QETH_PROT_IPV6, NULL);
6806
6807         if (on)
6808                 /* enable: success if any Assist is active */
6809                 return (rc_ipv6) ? rc_ipv4 : 0;
6810
6811         /* disable: failure if any Assist is still active */
6812         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6813 }
6814
6815 /**
6816  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6817  * @dev:        a net_device
6818  */
6819 void qeth_enable_hw_features(struct net_device *dev)
6820 {
6821         struct qeth_card *card = dev->ml_priv;
6822         netdev_features_t features;
6823
6824         features = dev->features;
6825         /* force-off any feature that might need an IPA sequence.
6826          * netdev_update_features() will restart them.
6827          */
6828         dev->features &= ~dev->hw_features;
6829         /* toggle VLAN filter, so that VIDs are re-programmed: */
6830         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6831                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6832                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6833         }
6834         netdev_update_features(dev);
6835         if (features != dev->features)
6836                 dev_warn(&card->gdev->dev,
6837                          "Device recovery failed to restore all offload features\n");
6838 }
6839 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6840
6841 static void qeth_check_restricted_features(struct qeth_card *card,
6842                                            netdev_features_t changed,
6843                                            netdev_features_t actual)
6844 {
6845         netdev_features_t ipv6_features = NETIF_F_TSO6;
6846         netdev_features_t ipv4_features = NETIF_F_TSO;
6847
6848         if (!card->info.has_lp2lp_cso_v6)
6849                 ipv6_features |= NETIF_F_IPV6_CSUM;
6850         if (!card->info.has_lp2lp_cso_v4)
6851                 ipv4_features |= NETIF_F_IP_CSUM;
6852
6853         if ((changed & ipv6_features) && !(actual & ipv6_features))
6854                 qeth_flush_local_addrs6(card);
6855         if ((changed & ipv4_features) && !(actual & ipv4_features))
6856                 qeth_flush_local_addrs4(card);
6857 }
6858
6859 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6860 {
6861         struct qeth_card *card = dev->ml_priv;
6862         netdev_features_t changed = dev->features ^ features;
6863         int rc = 0;
6864
6865         QETH_CARD_TEXT(card, 2, "setfeat");
6866         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6867
6868         if ((changed & NETIF_F_IP_CSUM)) {
6869                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6870                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6871                                        &card->info.has_lp2lp_cso_v4);
6872                 if (rc)
6873                         changed ^= NETIF_F_IP_CSUM;
6874         }
6875         if (changed & NETIF_F_IPV6_CSUM) {
6876                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6877                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6878                                        &card->info.has_lp2lp_cso_v6);
6879                 if (rc)
6880                         changed ^= NETIF_F_IPV6_CSUM;
6881         }
6882         if (changed & NETIF_F_RXCSUM) {
6883                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6884                 if (rc)
6885                         changed ^= NETIF_F_RXCSUM;
6886         }
6887         if (changed & NETIF_F_TSO) {
6888                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6889                                       QETH_PROT_IPV4);
6890                 if (rc)
6891                         changed ^= NETIF_F_TSO;
6892         }
6893         if (changed & NETIF_F_TSO6) {
6894                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6895                                       QETH_PROT_IPV6);
6896                 if (rc)
6897                         changed ^= NETIF_F_TSO6;
6898         }
6899
6900         qeth_check_restricted_features(card, dev->features ^ features,
6901                                        dev->features ^ changed);
6902
6903         /* everything changed successfully? */
6904         if ((dev->features ^ features) == changed)
6905                 return 0;
6906         /* something went wrong. save changed features and return error */
6907         dev->features ^= changed;
6908         return -EIO;
6909 }
6910 EXPORT_SYMBOL_GPL(qeth_set_features);
6911
6912 netdev_features_t qeth_fix_features(struct net_device *dev,
6913                                     netdev_features_t features)
6914 {
6915         struct qeth_card *card = dev->ml_priv;
6916
6917         QETH_CARD_TEXT(card, 2, "fixfeat");
6918         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6919                 features &= ~NETIF_F_IP_CSUM;
6920         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6921                 features &= ~NETIF_F_IPV6_CSUM;
6922         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6923             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6924                 features &= ~NETIF_F_RXCSUM;
6925         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6926                 features &= ~NETIF_F_TSO;
6927         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6928                 features &= ~NETIF_F_TSO6;
6929
6930         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6931         return features;
6932 }
6933 EXPORT_SYMBOL_GPL(qeth_fix_features);
6934
6935 netdev_features_t qeth_features_check(struct sk_buff *skb,
6936                                       struct net_device *dev,
6937                                       netdev_features_t features)
6938 {
6939         struct qeth_card *card = dev->ml_priv;
6940
6941         /* Traffic with local next-hop is not eligible for some offloads: */
6942         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6943             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6944                 netdev_features_t restricted = 0;
6945
6946                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6947                         restricted |= NETIF_F_ALL_TSO;
6948
6949                 switch (vlan_get_protocol(skb)) {
6950                 case htons(ETH_P_IP):
6951                         if (!card->info.has_lp2lp_cso_v4)
6952                                 restricted |= NETIF_F_IP_CSUM;
6953
6954                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6955                                 features &= ~restricted;
6956                         break;
6957                 case htons(ETH_P_IPV6):
6958                         if (!card->info.has_lp2lp_cso_v6)
6959                                 restricted |= NETIF_F_IPV6_CSUM;
6960
6961                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6962                                 features &= ~restricted;
6963                         break;
6964                 default:
6965                         break;
6966                 }
6967         }
6968
6969         /* GSO segmentation builds skbs with
6970          *      a (small) linear part for the headers, and
6971          *      page frags for the data.
6972          * Compared to a linear skb, the header-only part consumes an
6973          * additional buffer element. This reduces buffer utilization, and
6974          * hurts throughput. So compress small segments into one element.
6975          */
6976         if (netif_needs_gso(skb, features)) {
6977                 /* match skb_segment(): */
6978                 unsigned int doffset = skb->data - skb_mac_header(skb);
6979                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6980                 unsigned int hroom = skb_headroom(skb);
6981
6982                 /* linearize only if resulting skb allocations are order-0: */
6983                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6984                         features &= ~NETIF_F_SG;
6985         }
6986
6987         return vlan_features_check(skb, features);
6988 }
6989 EXPORT_SYMBOL_GPL(qeth_features_check);
6990
6991 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6992 {
6993         struct qeth_card *card = dev->ml_priv;
6994         struct qeth_qdio_out_q *queue;
6995         unsigned int i;
6996
6997         QETH_CARD_TEXT(card, 5, "getstat");
6998
6999         stats->rx_packets = card->stats.rx_packets;
7000         stats->rx_bytes = card->stats.rx_bytes;
7001         stats->rx_errors = card->stats.rx_length_errors +
7002                            card->stats.rx_frame_errors +
7003                            card->stats.rx_fifo_errors;
7004         stats->rx_dropped = card->stats.rx_dropped_nomem +
7005                             card->stats.rx_dropped_notsupp +
7006                             card->stats.rx_dropped_runt;
7007         stats->multicast = card->stats.rx_multicast;
7008         stats->rx_length_errors = card->stats.rx_length_errors;
7009         stats->rx_frame_errors = card->stats.rx_frame_errors;
7010         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7011
7012         for (i = 0; i < card->qdio.no_out_queues; i++) {
7013                 queue = card->qdio.out_qs[i];
7014
7015                 stats->tx_packets += queue->stats.tx_packets;
7016                 stats->tx_bytes += queue->stats.tx_bytes;
7017                 stats->tx_errors += queue->stats.tx_errors;
7018                 stats->tx_dropped += queue->stats.tx_dropped;
7019         }
7020 }
7021 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7022
7023 #define TC_IQD_UCAST   0
7024 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7025                                      unsigned int ucast_txqs)
7026 {
7027         unsigned int prio;
7028
7029         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7030          * qeth_iqd_select_queue() deals with this.
7031          * For unicast traffic, we defer the queue selection to the stack.
7032          * By installing a trivial prio map that spans over only the unicast
7033          * queues, we can encourage the stack to spread the ucast traffic evenly
7034          * without selecting the mcast queue.
7035          */
7036
7037         /* One traffic class, spanning over all active ucast queues: */
7038         netdev_set_num_tc(dev, 1);
7039         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7040                             QETH_IQD_MIN_UCAST_TXQ);
7041
7042         /* Map all priorities to this traffic class: */
7043         for (prio = 0; prio <= TC_BITMASK; prio++)
7044                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7045 }
7046
7047 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7048 {
7049         struct net_device *dev = card->dev;
7050         int rc;
7051
7052         /* Per netif_setup_tc(), adjust the mapping first: */
7053         if (IS_IQD(card))
7054                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7055
7056         rc = netif_set_real_num_tx_queues(dev, count);
7057
7058         if (rc && IS_IQD(card))
7059                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7060
7061         return rc;
7062 }
7063 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7064
7065 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7066                           u8 cast_type, struct net_device *sb_dev)
7067 {
7068         u16 txq;
7069
7070         if (cast_type != RTN_UNICAST)
7071                 return QETH_IQD_MCAST_TXQ;
7072         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7073                 return QETH_IQD_MIN_UCAST_TXQ;
7074
7075         txq = netdev_pick_tx(dev, skb, sb_dev);
7076         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7077 }
7078 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7079
7080 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7081                           struct net_device *sb_dev)
7082 {
7083         struct qeth_card *card = dev->ml_priv;
7084
7085         if (qeth_uses_tx_prio_queueing(card))
7086                 return qeth_get_priority_queue(card, skb);
7087
7088         return netdev_pick_tx(dev, skb, sb_dev);
7089 }
7090 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7091
7092 int qeth_open(struct net_device *dev)
7093 {
7094         struct qeth_card *card = dev->ml_priv;
7095         struct qeth_qdio_out_q *queue;
7096         unsigned int i;
7097
7098         QETH_CARD_TEXT(card, 4, "qethopen");
7099
7100         card->data.state = CH_STATE_UP;
7101         netif_tx_start_all_queues(dev);
7102
7103         local_bh_disable();
7104         qeth_for_each_output_queue(card, queue, i) {
7105                 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7106                                   QETH_NAPI_WEIGHT);
7107                 napi_enable(&queue->napi);
7108                 napi_schedule(&queue->napi);
7109         }
7110
7111         napi_enable(&card->napi);
7112         napi_schedule(&card->napi);
7113         /* kick-start the NAPI softirq: */
7114         local_bh_enable();
7115
7116         return 0;
7117 }
7118 EXPORT_SYMBOL_GPL(qeth_open);
7119
7120 int qeth_stop(struct net_device *dev)
7121 {
7122         struct qeth_card *card = dev->ml_priv;
7123         struct qeth_qdio_out_q *queue;
7124         unsigned int i;
7125
7126         QETH_CARD_TEXT(card, 4, "qethstop");
7127
7128         napi_disable(&card->napi);
7129         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7130         qdio_stop_irq(CARD_DDEV(card));
7131
7132         /* Quiesce the NAPI instances: */
7133         qeth_for_each_output_queue(card, queue, i)
7134                 napi_disable(&queue->napi);
7135
7136         /* Stop .ndo_start_xmit, might still access queue->napi. */
7137         netif_tx_disable(dev);
7138
7139         qeth_for_each_output_queue(card, queue, i) {
7140                 del_timer_sync(&queue->timer);
7141                 /* Queues may get re-allocated, so remove the NAPIs. */
7142                 netif_napi_del(&queue->napi);
7143         }
7144
7145         return 0;
7146 }
7147 EXPORT_SYMBOL_GPL(qeth_stop);
7148
7149 static int __init qeth_core_init(void)
7150 {
7151         int rc;
7152
7153         pr_info("loading core functions\n");
7154
7155         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7156
7157         rc = qeth_register_dbf_views();
7158         if (rc)
7159                 goto dbf_err;
7160         qeth_core_root_dev = root_device_register("qeth");
7161         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7162         if (rc)
7163                 goto register_err;
7164         qeth_core_header_cache =
7165                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7166                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7167                                   0, NULL);
7168         if (!qeth_core_header_cache) {
7169                 rc = -ENOMEM;
7170                 goto slab_err;
7171         }
7172         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7173                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7174         if (!qeth_qdio_outbuf_cache) {
7175                 rc = -ENOMEM;
7176                 goto cqslab_err;
7177         }
7178
7179         qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7180                                             sizeof(struct qaob),
7181                                             sizeof(struct qaob),
7182                                             0, NULL);
7183         if (!qeth_qaob_cache) {
7184                 rc = -ENOMEM;
7185                 goto qaob_err;
7186         }
7187
7188         rc = ccw_driver_register(&qeth_ccw_driver);
7189         if (rc)
7190                 goto ccw_err;
7191         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7192         if (rc)
7193                 goto ccwgroup_err;
7194
7195         return 0;
7196
7197 ccwgroup_err:
7198         ccw_driver_unregister(&qeth_ccw_driver);
7199 ccw_err:
7200         kmem_cache_destroy(qeth_qaob_cache);
7201 qaob_err:
7202         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7203 cqslab_err:
7204         kmem_cache_destroy(qeth_core_header_cache);
7205 slab_err:
7206         root_device_unregister(qeth_core_root_dev);
7207 register_err:
7208         qeth_unregister_dbf_views();
7209 dbf_err:
7210         debugfs_remove_recursive(qeth_debugfs_root);
7211         pr_err("Initializing the qeth device driver failed\n");
7212         return rc;
7213 }
7214
7215 static void __exit qeth_core_exit(void)
7216 {
7217         qeth_clear_dbf_list();
7218         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7219         ccw_driver_unregister(&qeth_ccw_driver);
7220         kmem_cache_destroy(qeth_qaob_cache);
7221         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7222         kmem_cache_destroy(qeth_core_header_cache);
7223         root_device_unregister(qeth_core_root_dev);
7224         qeth_unregister_dbf_views();
7225         debugfs_remove_recursive(qeth_debugfs_root);
7226         pr_info("core functions removed\n");
7227 }
7228
7229 module_init(qeth_core_init);
7230 module_exit(qeth_core_exit);
7231 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7232 MODULE_DESCRIPTION("qeth core functions");
7233 MODULE_LICENSE("GPL");