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
  63 static struct device *qeth_core_root_dev;
  64 static struct dentry *qeth_debugfs_root;
  65 static struct lock_class_key qdio_out_skb_queue_key;
  66
  67 static void qeth_issue_next_read_cb(struct qeth_card *card,
  68                                     struct qeth_cmd_buffer *iob,
  69                                     unsigned int data_length);
  70 static int qeth_qdio_establish(struct qeth_card *);
  71 static void qeth_free_qdio_queues(struct qeth_card *card);
  72
  73 static void qeth_close_dev_handler(struct work_struct *work)
  74 {
  75         struct qeth_card *card;
  76
  77         card = container_of(work, struct qeth_card, close_dev_work);
  78         QETH_CARD_TEXT(card, 2, "cldevhdl");
  79         ccwgroup_set_offline(card->gdev);
  80 }
  81
  82 static const char *qeth_get_cardname(struct qeth_card *card)
  83 {
  84         if (IS_VM_NIC(card)) {
  85                 switch (card->info.type) {
  86                 case QETH_CARD_TYPE_OSD:
  87                         return " Virtual NIC QDIO";
  88                 case QETH_CARD_TYPE_IQD:
  89                         return " Virtual NIC Hiper";
  90                 case QETH_CARD_TYPE_OSM:
  91                         return " Virtual NIC QDIO - OSM";
  92                 case QETH_CARD_TYPE_OSX:
  93                         return " Virtual NIC QDIO - OSX";
  94                 default:
  95                         return " unknown";
  96                 }
  97         } else {
  98                 switch (card->info.type) {
  99                 case QETH_CARD_TYPE_OSD:
 100                         return " OSD Express";
 101                 case QETH_CARD_TYPE_IQD:
 102                         return " HiperSockets";
 103                 case QETH_CARD_TYPE_OSM:
 104                         return " OSM QDIO";
 105                 case QETH_CARD_TYPE_OSX:
 106                         return " OSX QDIO";
 107                 default:
 108                         return " unknown";
 109                 }
 110         }
 111         return " n/a";
 112 }
 113
 114 /* max length to be returned: 14 */
 115 const char *qeth_get_cardname_short(struct qeth_card *card)
 116 {
 117         if (IS_VM_NIC(card)) {
 118                 switch (card->info.type) {
 119                 case QETH_CARD_TYPE_OSD:
 120                         return "Virt.NIC QDIO";
 121                 case QETH_CARD_TYPE_IQD:
 122                         return "Virt.NIC Hiper";
 123                 case QETH_CARD_TYPE_OSM:
 124                         return "Virt.NIC OSM";
 125                 case QETH_CARD_TYPE_OSX:
 126                         return "Virt.NIC OSX";
 127                 default:
 128                         return "unknown";
 129                 }
 130         } else {
 131                 switch (card->info.type) {
 132                 case QETH_CARD_TYPE_OSD:
 133                         switch (card->info.link_type) {
 134                         case QETH_LINK_TYPE_FAST_ETH:
 135                                 return "OSD_100";
 136                         case QETH_LINK_TYPE_HSTR:
 137                                 return "HSTR";
 138                         case QETH_LINK_TYPE_GBIT_ETH:
 139                                 return "OSD_1000";
 140                         case QETH_LINK_TYPE_10GBIT_ETH:
 141                                 return "OSD_10GIG";
 142                         case QETH_LINK_TYPE_25GBIT_ETH:
 143                                 return "OSD_25GIG";
 144                         case QETH_LINK_TYPE_LANE_ETH100:
 145                                 return "OSD_FE_LANE";
 146                         case QETH_LINK_TYPE_LANE_TR:
 147                                 return "OSD_TR_LANE";
 148                         case QETH_LINK_TYPE_LANE_ETH1000:
 149                                 return "OSD_GbE_LANE";
 150                         case QETH_LINK_TYPE_LANE:
 151                                 return "OSD_ATM_LANE";
 152                         default:
 153                                 return "OSD_Express";
 154                         }
 155                 case QETH_CARD_TYPE_IQD:
 156                         return "HiperSockets";
 157                 case QETH_CARD_TYPE_OSM:
 158                         return "OSM_1000";
 159                 case QETH_CARD_TYPE_OSX:
 160                         return "OSX_10GIG";
 161                 default:
 162                         return "unknown";
 163                 }
 164         }
 165         return "n/a";
 166 }
 167
 168 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 169                          int clear_start_mask)
 170 {
 171         unsigned long flags;
 172
 173         spin_lock_irqsave(&card->thread_mask_lock, flags);
 174         card->thread_allowed_mask = threads;
 175         if (clear_start_mask)
 176                 card->thread_start_mask &= threads;
 177         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 178         wake_up(&card->wait_q);
 179 }
 180 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 181
 182 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 183 {
 184         unsigned long flags;
 185         int rc = 0;
 186
 187         spin_lock_irqsave(&card->thread_mask_lock, flags);
 188         rc = (card->thread_running_mask & threads);
 189         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 190         return rc;
 191 }
 192 EXPORT_SYMBOL_GPL(qeth_threads_running);
 193
 194 static void qeth_clear_working_pool_list(struct qeth_card *card)
 195 {
 196         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 197         struct qeth_qdio_q *queue = card->qdio.in_q;
 198         unsigned int i;
 199
 200         QETH_CARD_TEXT(card, 5, "clwrklst");
 201         list_for_each_entry_safe(pool_entry, tmp,
 202                                  &card->qdio.in_buf_pool.entry_list, list)
 203                 list_del(&pool_entry->list);
 204
 205         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 206                 queue->bufs[i].pool_entry = NULL;
 207 }
 208
 209 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 210 {
 211         unsigned int i;
 212
 213         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 214                 if (entry->elements[i])
 215                         __free_page(entry->elements[i]);
 216         }
 217
 218         kfree(entry);
 219 }
 220
 221 static void qeth_free_buffer_pool(struct qeth_card *card)
 222 {
 223         struct qeth_buffer_pool_entry *entry, *tmp;
 224
 225         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 226                                  init_list) {
 227                 list_del(&entry->init_list);
 228                 qeth_free_pool_entry(entry);
 229         }
 230 }
 231
 232 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 233 {
 234         struct qeth_buffer_pool_entry *entry;
 235         unsigned int i;
 236
 237         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 238         if (!entry)
 239                 return NULL;
 240
 241         for (i = 0; i < pages; i++) {
 242                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 243
 244                 if (!entry->elements[i]) {
 245                         qeth_free_pool_entry(entry);
 246                         return NULL;
 247                 }
 248         }
 249
 250         return entry;
 251 }
 252
 253 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 254 {
 255         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 256         unsigned int i;
 257
 258         QETH_CARD_TEXT(card, 5, "alocpool");
 259         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 260                 struct qeth_buffer_pool_entry *entry;
 261
 262                 entry = qeth_alloc_pool_entry(buf_elements);
 263                 if (!entry) {
 264                         qeth_free_buffer_pool(card);
 265                         return -ENOMEM;
 266                 }
 267
 268                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 269         }
 270         return 0;
 271 }
 272
 273 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 274 {
 275         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 276         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 277         struct qeth_buffer_pool_entry *entry, *tmp;
 278         int delta = count - pool->buf_count;
 279         LIST_HEAD(entries);
 280
 281         QETH_CARD_TEXT(card, 2, "realcbp");
 282
 283         /* Defer until queue is allocated: */
 284         if (!card->qdio.in_q)
 285                 goto out;
 286
 287         /* Remove entries from the pool: */
 288         while (delta < 0) {
 289                 entry = list_first_entry(&pool->entry_list,
 290                                          struct qeth_buffer_pool_entry,
 291                                          init_list);
 292                 list_del(&entry->init_list);
 293                 qeth_free_pool_entry(entry);
 294
 295                 delta++;
 296         }
 297
 298         /* Allocate additional entries: */
 299         while (delta > 0) {
 300                 entry = qeth_alloc_pool_entry(buf_elements);
 301                 if (!entry) {
 302                         list_for_each_entry_safe(entry, tmp, &entries,
 303                                                  init_list) {
 304                                 list_del(&entry->init_list);
 305                                 qeth_free_pool_entry(entry);
 306                         }
 307
 308                         return -ENOMEM;
 309                 }
 310
 311                 list_add(&entry->init_list, &entries);
 312
 313                 delta--;
 314         }
 315
 316         list_splice(&entries, &pool->entry_list);
 317
 318 out:
 319         card->qdio.in_buf_pool.buf_count = count;
 320         pool->buf_count = count;
 321         return 0;
 322 }
 323 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 324
 325 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 326 {
 327         if (!q)
 328                 return;
 329
 330         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 331         kfree(q);
 332 }
 333
 334 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 335 {
 336         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 337         int i;
 338
 339         if (!q)
 340                 return NULL;
 341
 342         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 343                 kfree(q);
 344                 return NULL;
 345         }
 346
 347         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 348                 q->bufs[i].buffer = q->qdio_bufs[i];
 349
 350         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 351         return q;
 352 }
 353
 354 static int qeth_cq_init(struct qeth_card *card)
 355 {
 356         int rc;
 357
 358         if (card->options.cq == QETH_CQ_ENABLED) {
 359                 QETH_CARD_TEXT(card, 2, "cqinit");
 360                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 361                                    QDIO_MAX_BUFFERS_PER_Q);
 362                 card->qdio.c_q->next_buf_to_init = 127;
 363                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 364                              card->qdio.no_in_queues - 1, 0, 127, NULL);
 365                 if (rc) {
 366                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 367                         goto out;
 368                 }
 369         }
 370         rc = 0;
 371 out:
 372         return rc;
 373 }
 374
 375 static int qeth_alloc_cq(struct qeth_card *card)
 376 {
 377         if (card->options.cq == QETH_CQ_ENABLED) {
 378                 QETH_CARD_TEXT(card, 2, "cqon");
 379                 card->qdio.c_q = qeth_alloc_qdio_queue();
 380                 if (!card->qdio.c_q) {
 381                         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 382                         return -ENOMEM;
 383                 }
 384
 385                 card->qdio.no_in_queues = 2;
 386         } else {
 387                 QETH_CARD_TEXT(card, 2, "nocq");
 388                 card->qdio.c_q = NULL;
 389                 card->qdio.no_in_queues = 1;
 390         }
 391         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 392         return 0;
 393 }
 394
 395 static void qeth_free_cq(struct qeth_card *card)
 396 {
 397         if (card->qdio.c_q) {
 398                 --card->qdio.no_in_queues;
 399                 qeth_free_qdio_queue(card->qdio.c_q);
 400                 card->qdio.c_q = NULL;
 401         }
 402 }
 403
 404 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 405                                                         int delayed)
 406 {
 407         enum iucv_tx_notify n;
 408
 409         switch (sbalf15) {
 410         case 0:
 411                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 412                 break;
 413         case 4:
 414         case 16:
 415         case 17:
 416         case 18:
 417                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 418                         TX_NOTIFY_UNREACHABLE;
 419                 break;
 420         default:
 421                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 422                         TX_NOTIFY_GENERALERROR;
 423                 break;
 424         }
 425
 426         return n;
 427 }
 428
 429 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 430 {
 431         if (refcount_dec_and_test(&iob->ref_count)) {
 432                 kfree(iob->data);
 433                 kfree(iob);
 434         }
 435 }
 436 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 437                            void *data)
 438 {
 439         ccw->cmd_code = cmd_code;
 440         ccw->flags = flags | CCW_FLAG_SLI;
 441         ccw->count = len;
 442         ccw->cda = (__u32) __pa(data);
 443 }
 444
 445 static int __qeth_issue_next_read(struct qeth_card *card)
 446 {
 447         struct qeth_cmd_buffer *iob = card->read_cmd;
 448         struct qeth_channel *channel = iob->channel;
 449         struct ccw1 *ccw = __ccw_from_cmd(iob);
 450         int rc;
 451
 452         QETH_CARD_TEXT(card, 5, "issnxrd");
 453         if (channel->state != CH_STATE_UP)
 454                 return -EIO;
 455
 456         memset(iob->data, 0, iob->length);
 457         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 458         iob->callback = qeth_issue_next_read_cb;
 459         /* keep the cmd alive after completion: */
 460         qeth_get_cmd(iob);
 461
 462         QETH_CARD_TEXT(card, 6, "noirqpnd");
 463         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 464         if (!rc) {
 465                 channel->active_cmd = iob;
 466         } else {
 467                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 468                                  rc, CARD_DEVID(card));
 469                 qeth_unlock_channel(card, channel);
 470                 qeth_put_cmd(iob);
 471                 card->read_or_write_problem = 1;
 472                 qeth_schedule_recovery(card);
 473         }
 474         return rc;
 475 }
 476
 477 static int qeth_issue_next_read(struct qeth_card *card)
 478 {
 479         int ret;
 480
 481         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 482         ret = __qeth_issue_next_read(card);
 483         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 484
 485         return ret;
 486 }
 487
 488 static void qeth_enqueue_cmd(struct qeth_card *card,
 489                              struct qeth_cmd_buffer *iob)
 490 {
 491         spin_lock_irq(&card->lock);
 492         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 493         spin_unlock_irq(&card->lock);
 494 }
 495
 496 static void qeth_dequeue_cmd(struct qeth_card *card,
 497                              struct qeth_cmd_buffer *iob)
 498 {
 499         spin_lock_irq(&card->lock);
 500         list_del(&iob->list_entry);
 501         spin_unlock_irq(&card->lock);
 502 }
 503
 504 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 505 {
 506         iob->rc = reason;
 507         complete(&iob->done);
 508 }
 509
 510 static void qeth_flush_local_addrs4(struct qeth_card *card)
 511 {
 512         struct qeth_local_addr *addr;
 513         struct hlist_node *tmp;
 514         unsigned int i;
 515
 516         spin_lock_irq(&card->local_addrs4_lock);
 517         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 518                 hash_del_rcu(&addr->hnode);
 519                 kfree_rcu(addr, rcu);
 520         }
 521         spin_unlock_irq(&card->local_addrs4_lock);
 522 }
 523
 524 static void qeth_flush_local_addrs6(struct qeth_card *card)
 525 {
 526         struct qeth_local_addr *addr;
 527         struct hlist_node *tmp;
 528         unsigned int i;
 529
 530         spin_lock_irq(&card->local_addrs6_lock);
 531         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 532                 hash_del_rcu(&addr->hnode);
 533                 kfree_rcu(addr, rcu);
 534         }
 535         spin_unlock_irq(&card->local_addrs6_lock);
 536 }
 537
 538 static void qeth_flush_local_addrs(struct qeth_card *card)
 539 {
 540         qeth_flush_local_addrs4(card);
 541         qeth_flush_local_addrs6(card);
 542 }
 543
 544 static void qeth_add_local_addrs4(struct qeth_card *card,
 545                                   struct qeth_ipacmd_local_addrs4 *cmd)
 546 {
 547         unsigned int i;
 548
 549         if (cmd->addr_length !=
 550             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 551                 dev_err_ratelimited(&card->gdev->dev,
 552                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 553                                     cmd->addr_length);
 554                 return;
 555         }
 556
 557         spin_lock(&card->local_addrs4_lock);
 558         for (i = 0; i < cmd->count; i++) {
 559                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 560                 struct qeth_local_addr *addr;
 561                 bool duplicate = false;
 562
 563                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 564                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 565                                 duplicate = true;
 566                                 break;
 567                         }
 568                 }
 569
 570                 if (duplicate)
 571                         continue;
 572
 573                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 574                 if (!addr) {
 575                         dev_err(&card->gdev->dev,
 576                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 577                                 &cmd->addrs[i].addr);
 578                         continue;
 579                 }
 580
 581                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 582                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 583         }
 584         spin_unlock(&card->local_addrs4_lock);
 585 }
 586
 587 static void qeth_add_local_addrs6(struct qeth_card *card,
 588                                   struct qeth_ipacmd_local_addrs6 *cmd)
 589 {
 590         unsigned int i;
 591
 592         if (cmd->addr_length !=
 593             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 594                 dev_err_ratelimited(&card->gdev->dev,
 595                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 596                                     cmd->addr_length);
 597                 return;
 598         }
 599
 600         spin_lock(&card->local_addrs6_lock);
 601         for (i = 0; i < cmd->count; i++) {
 602                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 603                 struct qeth_local_addr *addr;
 604                 bool duplicate = false;
 605
 606                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 607                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 608                                 duplicate = true;
 609                                 break;
 610                         }
 611                 }
 612
 613                 if (duplicate)
 614                         continue;
 615
 616                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 617                 if (!addr) {
 618                         dev_err(&card->gdev->dev,
 619                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 620                                 &cmd->addrs[i].addr);
 621                         continue;
 622                 }
 623
 624                 addr->addr = cmd->addrs[i].addr;
 625                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 626         }
 627         spin_unlock(&card->local_addrs6_lock);
 628 }
 629
 630 static void qeth_del_local_addrs4(struct qeth_card *card,
 631                                   struct qeth_ipacmd_local_addrs4 *cmd)
 632 {
 633         unsigned int i;
 634
 635         if (cmd->addr_length !=
 636             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 637                 dev_err_ratelimited(&card->gdev->dev,
 638                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 639                                     cmd->addr_length);
 640                 return;
 641         }
 642
 643         spin_lock(&card->local_addrs4_lock);
 644         for (i = 0; i < cmd->count; i++) {
 645                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 646                 unsigned int key = ipv4_addr_hash(addr->addr);
 647                 struct qeth_local_addr *tmp;
 648
 649                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 650                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 651                                 hash_del_rcu(&tmp->hnode);
 652                                 kfree_rcu(tmp, rcu);
 653                                 break;
 654                         }
 655                 }
 656         }
 657         spin_unlock(&card->local_addrs4_lock);
 658 }
 659
 660 static void qeth_del_local_addrs6(struct qeth_card *card,
 661                                   struct qeth_ipacmd_local_addrs6 *cmd)
 662 {
 663         unsigned int i;
 664
 665         if (cmd->addr_length !=
 666             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 667                 dev_err_ratelimited(&card->gdev->dev,
 668                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 669                                     cmd->addr_length);
 670                 return;
 671         }
 672
 673         spin_lock(&card->local_addrs6_lock);
 674         for (i = 0; i < cmd->count; i++) {
 675                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 676                 u32 key = ipv6_addr_hash(&addr->addr);
 677                 struct qeth_local_addr *tmp;
 678
 679                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 680                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 681                                 hash_del_rcu(&tmp->hnode);
 682                                 kfree_rcu(tmp, rcu);
 683                                 break;
 684                         }
 685                 }
 686         }
 687         spin_unlock(&card->local_addrs6_lock);
 688 }
 689
 690 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 691                                       struct sk_buff *skb)
 692 {
 693         struct qeth_local_addr *tmp;
 694         bool is_local = false;
 695         unsigned int key;
 696         __be32 next_hop;
 697
 698         if (hash_empty(card->local_addrs4))
 699                 return false;
 700
 701         rcu_read_lock();
 702         next_hop = qeth_next_hop_v4_rcu(skb,
 703                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 704         key = ipv4_addr_hash(next_hop);
 705
 706         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 707                 if (tmp->addr.s6_addr32[3] == next_hop) {
 708                         is_local = true;
 709                         break;
 710                 }
 711         }
 712         rcu_read_unlock();
 713
 714         return is_local;
 715 }
 716
 717 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 718                                       struct sk_buff *skb)
 719 {
 720         struct qeth_local_addr *tmp;
 721         struct in6_addr *next_hop;
 722         bool is_local = false;
 723         u32 key;
 724
 725         if (hash_empty(card->local_addrs6))
 726                 return false;
 727
 728         rcu_read_lock();
 729         next_hop = qeth_next_hop_v6_rcu(skb,
 730                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 731         key = ipv6_addr_hash(next_hop);
 732
 733         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 734                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 735                         is_local = true;
 736                         break;
 737                 }
 738         }
 739         rcu_read_unlock();
 740
 741         return is_local;
 742 }
 743
 744 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 745 {
 746         struct qeth_card *card = m->private;
 747         struct qeth_local_addr *tmp;
 748         unsigned int i;
 749
 750         rcu_read_lock();
 751         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 752                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 753         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 754                 seq_printf(m, "%pI6c\n", &tmp->addr);
 755         rcu_read_unlock();
 756
 757         return 0;
 758 }
 759
 760 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 761
 762 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 763                 struct qeth_card *card)
 764 {
 765         const char *ipa_name;
 766         int com = cmd->hdr.command;
 767
 768         ipa_name = qeth_get_ipa_cmd_name(com);
 769
 770         if (rc)
 771                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 772                                  ipa_name, com, CARD_DEVID(card), rc,
 773                                  qeth_get_ipa_msg(rc));
 774         else
 775                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 776                                  ipa_name, com, CARD_DEVID(card));
 777 }
 778
 779 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 780                                                 struct qeth_ipa_cmd *cmd)
 781 {
 782         QETH_CARD_TEXT(card, 5, "chkipad");
 783
 784         if (IS_IPA_REPLY(cmd)) {
 785                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 786                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 787                 return cmd;
 788         }
 789
 790         /* handle unsolicited event: */
 791         switch (cmd->hdr.command) {
 792         case IPA_CMD_STOPLAN:
 793                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 794                         dev_err(&card->gdev->dev,
 795                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 796                                 netdev_name(card->dev));
 797                         schedule_work(&card->close_dev_work);
 798                 } else {
 799                         dev_warn(&card->gdev->dev,
 800                                  "The link for interface %s on CHPID 0x%X failed\n",
 801                                  netdev_name(card->dev), card->info.chpid);
 802                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 803                         netif_carrier_off(card->dev);
 804                 }
 805                 return NULL;
 806         case IPA_CMD_STARTLAN:
 807                 dev_info(&card->gdev->dev,
 808                          "The link for %s on CHPID 0x%X has been restored\n",
 809                          netdev_name(card->dev), card->info.chpid);
 810                 if (card->info.hwtrap)
 811                         card->info.hwtrap = 2;
 812                 qeth_schedule_recovery(card);
 813                 return NULL;
 814         case IPA_CMD_SETBRIDGEPORT_IQD:
 815         case IPA_CMD_SETBRIDGEPORT_OSA:
 816         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 817                 if (card->discipline->control_event_handler(card, cmd))
 818                         return cmd;
 819                 return NULL;
 820         case IPA_CMD_REGISTER_LOCAL_ADDR:
 821                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 822                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 823                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 824                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 825
 826                 QETH_CARD_TEXT(card, 3, "irla");
 827                 return NULL;
 828         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 829                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 830                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 831                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 832                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 833
 834                 QETH_CARD_TEXT(card, 3, "urla");
 835                 return NULL;
 836         default:
 837                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 838                 return cmd;
 839         }
 840 }
 841
 842 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 843 {
 844         struct qeth_cmd_buffer *iob;
 845         unsigned long flags;
 846
 847         QETH_CARD_TEXT(card, 4, "clipalst");
 848
 849         spin_lock_irqsave(&card->lock, flags);
 850         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 851                 qeth_notify_cmd(iob, -ECANCELED);
 852         spin_unlock_irqrestore(&card->lock, flags);
 853 }
 854
 855 static int qeth_check_idx_response(struct qeth_card *card,
 856         unsigned char *buffer)
 857 {
 858         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 859         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 860                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 861                                  buffer[4]);
 862                 QETH_CARD_TEXT(card, 2, "ckidxres");
 863                 QETH_CARD_TEXT(card, 2, " idxterm");
 864                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 865                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 866                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 867                         dev_err(&card->gdev->dev,
 868                                 "The device does not support the configured transport mode\n");
 869                         return -EPROTONOSUPPORT;
 870                 }
 871                 return -EIO;
 872         }
 873         return 0;
 874 }
 875
 876 static void qeth_release_buffer_cb(struct qeth_card *card,
 877                                    struct qeth_cmd_buffer *iob,
 878                                    unsigned int data_length)
 879 {
 880         qeth_put_cmd(iob);
 881 }
 882
 883 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 884 {
 885         qeth_notify_cmd(iob, rc);
 886         qeth_put_cmd(iob);
 887 }
 888
 889 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 890                                               unsigned int length,
 891                                               unsigned int ccws, long timeout)
 892 {
 893         struct qeth_cmd_buffer *iob;
 894
 895         if (length > QETH_BUFSIZE)
 896                 return NULL;
 897
 898         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 899         if (!iob)
 900                 return NULL;
 901
 902         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 903                             GFP_KERNEL | GFP_DMA);
 904         if (!iob->data) {
 905                 kfree(iob);
 906                 return NULL;
 907         }
 908
 909         init_completion(&iob->done);
 910         spin_lock_init(&iob->lock);
 911         refcount_set(&iob->ref_count, 1);
 912         iob->channel = channel;
 913         iob->timeout = timeout;
 914         iob->length = length;
 915         return iob;
 916 }
 917
 918 static void qeth_issue_next_read_cb(struct qeth_card *card,
 919                                     struct qeth_cmd_buffer *iob,
 920                                     unsigned int data_length)
 921 {
 922         struct qeth_cmd_buffer *request = NULL;
 923         struct qeth_ipa_cmd *cmd = NULL;
 924         struct qeth_reply *reply = NULL;
 925         struct qeth_cmd_buffer *tmp;
 926         unsigned long flags;
 927         int rc = 0;
 928
 929         QETH_CARD_TEXT(card, 4, "sndctlcb");
 930         rc = qeth_check_idx_response(card, iob->data);
 931         switch (rc) {
 932         case 0:
 933                 break;
 934         case -EIO:
 935                 qeth_schedule_recovery(card);
 936                 fallthrough;
 937         default:
 938                 qeth_clear_ipacmd_list(card);
 939                 goto err_idx;
 940         }
 941
 942         cmd = __ipa_reply(iob);
 943         if (cmd) {
 944                 cmd = qeth_check_ipa_data(card, cmd);
 945                 if (!cmd)
 946                         goto out;
 947         }
 948
 949         /* match against pending cmd requests */
 950         spin_lock_irqsave(&card->lock, flags);
 951         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 952                 if (tmp->match && tmp->match(tmp, iob)) {
 953                         request = tmp;
 954                         /* take the object outside the lock */
 955                         qeth_get_cmd(request);
 956                         break;
 957                 }
 958         }
 959         spin_unlock_irqrestore(&card->lock, flags);
 960
 961         if (!request)
 962                 goto out;
 963
 964         reply = &request->reply;
 965         if (!reply->callback) {
 966                 rc = 0;
 967                 goto no_callback;
 968         }
 969
 970         spin_lock_irqsave(&request->lock, flags);
 971         if (request->rc)
 972                 /* Bail out when the requestor has already left: */
 973                 rc = request->rc;
 974         else
 975                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
 976                                                         (unsigned long)iob);
 977         spin_unlock_irqrestore(&request->lock, flags);
 978
 979 no_callback:
 980         if (rc <= 0)
 981                 qeth_notify_cmd(request, rc);
 982         qeth_put_cmd(request);
 983 out:
 984         memcpy(&card->seqno.pdu_hdr_ack,
 985                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 986                 QETH_SEQ_NO_LENGTH);
 987         __qeth_issue_next_read(card);
 988 err_idx:
 989         qeth_put_cmd(iob);
 990 }
 991
 992 static int qeth_set_thread_start_bit(struct qeth_card *card,
 993                 unsigned long thread)
 994 {
 995         unsigned long flags;
 996         int rc = 0;
 997
 998         spin_lock_irqsave(&card->thread_mask_lock, flags);
 999         if (!(card->thread_allowed_mask & thread))
1000                 rc = -EPERM;
1001         else if (card->thread_start_mask & thread)
1002                 rc = -EBUSY;
1003         else
1004                 card->thread_start_mask |= thread;
1005         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1006
1007         return rc;
1008 }
1009
1010 static void qeth_clear_thread_start_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_start_mask &= ~thread;
1017         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1018         wake_up(&card->wait_q);
1019 }
1020
1021 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1022                                           unsigned long thread)
1023 {
1024         unsigned long flags;
1025
1026         spin_lock_irqsave(&card->thread_mask_lock, flags);
1027         card->thread_running_mask &= ~thread;
1028         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1029         wake_up_all(&card->wait_q);
1030 }
1031
1032 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1033 {
1034         unsigned long flags;
1035         int rc = 0;
1036
1037         spin_lock_irqsave(&card->thread_mask_lock, flags);
1038         if (card->thread_start_mask & thread) {
1039                 if ((card->thread_allowed_mask & thread) &&
1040                     !(card->thread_running_mask & thread)) {
1041                         rc = 1;
1042                         card->thread_start_mask &= ~thread;
1043                         card->thread_running_mask |= thread;
1044                 } else
1045                         rc = -EPERM;
1046         }
1047         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1048         return rc;
1049 }
1050
1051 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1052 {
1053         int rc = 0;
1054
1055         wait_event(card->wait_q,
1056                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1057         return rc;
1058 }
1059
1060 int qeth_schedule_recovery(struct qeth_card *card)
1061 {
1062         int rc;
1063
1064         QETH_CARD_TEXT(card, 2, "startrec");
1065
1066         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1067         if (!rc)
1068                 schedule_work(&card->kernel_thread_starter);
1069
1070         return rc;
1071 }
1072
1073 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1074                             struct irb *irb)
1075 {
1076         int dstat, cstat;
1077         char *sense;
1078
1079         sense = (char *) irb->ecw;
1080         cstat = irb->scsw.cmd.cstat;
1081         dstat = irb->scsw.cmd.dstat;
1082
1083         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1084                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1085                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1086                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1087                 dev_warn(&cdev->dev, "The qeth device driver "
1088                         "failed to recover an error on the device\n");
1089                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1090                                  CCW_DEVID(cdev), dstat, cstat);
1091                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1092                                 16, 1, irb, 64, 1);
1093                 return -EIO;
1094         }
1095
1096         if (dstat & DEV_STAT_UNIT_CHECK) {
1097                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1098                     SENSE_RESETTING_EVENT_FLAG) {
1099                         QETH_CARD_TEXT(card, 2, "REVIND");
1100                         return -EIO;
1101                 }
1102                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1103                     SENSE_COMMAND_REJECT_FLAG) {
1104                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1105                         return -EIO;
1106                 }
1107                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1108                         QETH_CARD_TEXT(card, 2, "AFFE");
1109                         return -EIO;
1110                 }
1111                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1112                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1113                         return 0;
1114                 }
1115                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1116                 return -EIO;
1117         }
1118         return 0;
1119 }
1120
1121 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1122                                 struct irb *irb)
1123 {
1124         if (!IS_ERR(irb))
1125                 return 0;
1126
1127         switch (PTR_ERR(irb)) {
1128         case -EIO:
1129                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1130                                  CCW_DEVID(cdev));
1131                 QETH_CARD_TEXT(card, 2, "ckirberr");
1132                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1133                 return -EIO;
1134         case -ETIMEDOUT:
1135                 dev_warn(&cdev->dev, "A hardware operation timed out"
1136                         " on the device\n");
1137                 QETH_CARD_TEXT(card, 2, "ckirberr");
1138                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1139                 return -ETIMEDOUT;
1140         default:
1141                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1142                                  PTR_ERR(irb), CCW_DEVID(cdev));
1143                 QETH_CARD_TEXT(card, 2, "ckirberr");
1144                 QETH_CARD_TEXT(card, 2, "  rc???");
1145                 return PTR_ERR(irb);
1146         }
1147 }
1148
1149 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1150                 struct irb *irb)
1151 {
1152         int rc;
1153         int cstat, dstat;
1154         struct qeth_cmd_buffer *iob = NULL;
1155         struct ccwgroup_device *gdev;
1156         struct qeth_channel *channel;
1157         struct qeth_card *card;
1158
1159         /* while we hold the ccwdev lock, this stays valid: */
1160         gdev = dev_get_drvdata(&cdev->dev);
1161         card = dev_get_drvdata(&gdev->dev);
1162
1163         QETH_CARD_TEXT(card, 5, "irq");
1164
1165         if (card->read.ccwdev == cdev) {
1166                 channel = &card->read;
1167                 QETH_CARD_TEXT(card, 5, "read");
1168         } else if (card->write.ccwdev == cdev) {
1169                 channel = &card->write;
1170                 QETH_CARD_TEXT(card, 5, "write");
1171         } else {
1172                 channel = &card->data;
1173                 QETH_CARD_TEXT(card, 5, "data");
1174         }
1175
1176         if (intparm == 0) {
1177                 QETH_CARD_TEXT(card, 5, "irqunsol");
1178         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1179                 QETH_CARD_TEXT(card, 5, "irqunexp");
1180
1181                 dev_err(&cdev->dev,
1182                         "Received IRQ with intparm %lx, expected %px\n",
1183                         intparm, channel->active_cmd);
1184                 if (channel->active_cmd)
1185                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1186         } else {
1187                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1188         }
1189
1190         qeth_unlock_channel(card, channel);
1191
1192         rc = qeth_check_irb_error(card, cdev, irb);
1193         if (rc) {
1194                 /* IO was terminated, free its resources. */
1195                 if (iob)
1196                         qeth_cancel_cmd(iob, rc);
1197                 return;
1198         }
1199
1200         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1201                 channel->state = CH_STATE_STOPPED;
1202                 wake_up(&card->wait_q);
1203         }
1204
1205         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1206                 channel->state = CH_STATE_HALTED;
1207                 wake_up(&card->wait_q);
1208         }
1209
1210         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1211                                           SCSW_FCTL_HALT_FUNC))) {
1212                 qeth_cancel_cmd(iob, -ECANCELED);
1213                 iob = NULL;
1214         }
1215
1216         cstat = irb->scsw.cmd.cstat;
1217         dstat = irb->scsw.cmd.dstat;
1218
1219         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1220             (dstat & DEV_STAT_UNIT_CHECK) ||
1221             (cstat)) {
1222                 if (irb->esw.esw0.erw.cons) {
1223                         dev_warn(&channel->ccwdev->dev,
1224                                 "The qeth device driver failed to recover "
1225                                 "an error on the device\n");
1226                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1227                                          CCW_DEVID(channel->ccwdev), cstat,
1228                                          dstat);
1229                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1230                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1231                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1232                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1233                 }
1234
1235                 rc = qeth_get_problem(card, cdev, irb);
1236                 if (rc) {
1237                         card->read_or_write_problem = 1;
1238                         if (iob)
1239                                 qeth_cancel_cmd(iob, rc);
1240                         qeth_clear_ipacmd_list(card);
1241                         qeth_schedule_recovery(card);
1242                         return;
1243                 }
1244         }
1245
1246         if (iob) {
1247                 /* sanity check: */
1248                 if (irb->scsw.cmd.count > iob->length) {
1249                         qeth_cancel_cmd(iob, -EIO);
1250                         return;
1251                 }
1252                 if (iob->callback)
1253                         iob->callback(card, iob,
1254                                       iob->length - irb->scsw.cmd.count);
1255         }
1256 }
1257
1258 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1259                 struct qeth_qdio_out_buffer *buf,
1260                 enum iucv_tx_notify notification)
1261 {
1262         struct sk_buff *skb;
1263
1264         skb_queue_walk(&buf->skb_list, skb) {
1265                 struct sock *sk = skb->sk;
1266
1267                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1268                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1269                 if (sk && sk->sk_family == PF_IUCV)
1270                         iucv_sk(sk)->sk_txnotify(sk, notification);
1271         }
1272 }
1273
1274 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1275                                  struct qeth_qdio_out_buffer *buf, bool error,
1276                                  int budget)
1277 {
1278         struct sk_buff *skb;
1279
1280         /* Empty buffer? */
1281         if (buf->next_element_to_fill == 0)
1282                 return;
1283
1284         QETH_TXQ_STAT_INC(queue, bufs);
1285         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1286         if (error) {
1287                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1288         } else {
1289                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1290                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1291         }
1292
1293         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1294                 unsigned int bytes = qdisc_pkt_len(skb);
1295                 bool is_tso = skb_is_gso(skb);
1296                 unsigned int packets;
1297
1298                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1299                 if (!error) {
1300                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1301                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1302                         if (skb_is_nonlinear(skb))
1303                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1304                         if (is_tso) {
1305                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1306                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1307                         }
1308                 }
1309
1310                 napi_consume_skb(skb, budget);
1311         }
1312 }
1313
1314 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1315                                      struct qeth_qdio_out_buffer *buf,
1316                                      bool error, int budget)
1317 {
1318         int i;
1319
1320         /* is PCI flag set on buffer? */
1321         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1322                 atomic_dec(&queue->set_pci_flags_count);
1323                 QETH_TXQ_STAT_INC(queue, completion_irq);
1324         }
1325
1326         qeth_tx_complete_buf(queue, buf, error, budget);
1327
1328         for (i = 0; i < queue->max_elements; ++i) {
1329                 void *data = phys_to_virt(buf->buffer->element[i].addr);
1330
1331                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1332                         kmem_cache_free(qeth_core_header_cache, data);
1333         }
1334
1335         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1336         buf->next_element_to_fill = 0;
1337         buf->frames = 0;
1338         buf->bytes = 0;
1339         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1340 }
1341
1342 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1343 {
1344         if (buf->aob)
1345                 qdio_release_aob(buf->aob);
1346         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1347 }
1348
1349 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1350                                           struct qeth_qdio_out_q *queue,
1351                                           bool drain, int budget)
1352 {
1353         struct qeth_qdio_out_buffer *buf, *tmp;
1354
1355         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1356                 struct qeth_qaob_priv1 *priv;
1357                 struct qaob *aob = buf->aob;
1358                 enum iucv_tx_notify notify;
1359                 unsigned int i;
1360
1361                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1362                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1363                         QETH_CARD_TEXT(card, 5, "fp");
1364                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1365
1366                         notify = drain ? TX_NOTIFY_GENERALERROR :
1367                                          qeth_compute_cq_notification(aob->aorc, 1);
1368                         qeth_notify_skbs(queue, buf, notify);
1369                         qeth_tx_complete_buf(queue, buf, drain, budget);
1370
1371                         for (i = 0;
1372                              i < aob->sb_count && i < queue->max_elements;
1373                              i++) {
1374                                 void *data = phys_to_virt(aob->sba[i]);
1375
1376                                 if (test_bit(i, buf->from_kmem_cache) && data)
1377                                         kmem_cache_free(qeth_core_header_cache,
1378                                                         data);
1379                         }
1380
1381                         list_del(&buf->list_entry);
1382                         qeth_free_out_buf(buf);
1383                 }
1384         }
1385 }
1386
1387 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1388 {
1389         int j;
1390
1391         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1392
1393         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1394                 if (!q->bufs[j])
1395                         continue;
1396
1397                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1398                 if (free) {
1399                         qeth_free_out_buf(q->bufs[j]);
1400                         q->bufs[j] = NULL;
1401                 }
1402         }
1403 }
1404
1405 static void qeth_drain_output_queues(struct qeth_card *card)
1406 {
1407         int i;
1408
1409         QETH_CARD_TEXT(card, 2, "clearqdbf");
1410         /* clear outbound buffers to free skbs */
1411         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1412                 if (card->qdio.out_qs[i])
1413                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1414         }
1415 }
1416
1417 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1418 {
1419         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1420
1421         if (card->qdio.no_out_queues == max)
1422                 return;
1423
1424         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1425                 qeth_free_qdio_queues(card);
1426
1427         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1428                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1429
1430         card->qdio.no_out_queues = max;
1431 }
1432
1433 static int qeth_update_from_chp_desc(struct qeth_card *card)
1434 {
1435         struct ccw_device *ccwdev;
1436         struct channel_path_desc_fmt0 *chp_dsc;
1437
1438         QETH_CARD_TEXT(card, 2, "chp_desc");
1439
1440         ccwdev = card->data.ccwdev;
1441         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1442         if (!chp_dsc)
1443                 return -ENOMEM;
1444
1445         card->info.func_level = 0x4100 + chp_dsc->desc;
1446
1447         if (IS_OSD(card) || IS_OSX(card))
1448                 /* CHPP field bit 6 == 1 -> single queue */
1449                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1450
1451         kfree(chp_dsc);
1452         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1453         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1454         return 0;
1455 }
1456
1457 static void qeth_init_qdio_info(struct qeth_card *card)
1458 {
1459         QETH_CARD_TEXT(card, 4, "intqdinf");
1460         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1461         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1462         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1463
1464         /* inbound */
1465         card->qdio.no_in_queues = 1;
1466         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1467         if (IS_IQD(card))
1468                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1469         else
1470                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1471         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1472         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1473         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1474 }
1475
1476 static void qeth_set_initial_options(struct qeth_card *card)
1477 {
1478         card->options.route4.type = NO_ROUTER;
1479         card->options.route6.type = NO_ROUTER;
1480         card->options.isolation = ISOLATION_MODE_NONE;
1481         card->options.cq = QETH_CQ_DISABLED;
1482         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1483 }
1484
1485 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1486 {
1487         unsigned long flags;
1488         int rc = 0;
1489
1490         spin_lock_irqsave(&card->thread_mask_lock, flags);
1491         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1492                         (u8) card->thread_start_mask,
1493                         (u8) card->thread_allowed_mask,
1494                         (u8) card->thread_running_mask);
1495         rc = (card->thread_start_mask & thread);
1496         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1497         return rc;
1498 }
1499
1500 static int qeth_do_reset(void *data);
1501 static void qeth_start_kernel_thread(struct work_struct *work)
1502 {
1503         struct task_struct *ts;
1504         struct qeth_card *card = container_of(work, struct qeth_card,
1505                                         kernel_thread_starter);
1506         QETH_CARD_TEXT(card, 2, "strthrd");
1507
1508         if (card->read.state != CH_STATE_UP &&
1509             card->write.state != CH_STATE_UP)
1510                 return;
1511         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1512                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1513                 if (IS_ERR(ts)) {
1514                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1515                         qeth_clear_thread_running_bit(card,
1516                                 QETH_RECOVER_THREAD);
1517                 }
1518         }
1519 }
1520
1521 static void qeth_buffer_reclaim_work(struct work_struct *);
1522 static void qeth_setup_card(struct qeth_card *card)
1523 {
1524         QETH_CARD_TEXT(card, 2, "setupcrd");
1525
1526         card->info.type = CARD_RDEV(card)->id.driver_info;
1527         card->state = CARD_STATE_DOWN;
1528         spin_lock_init(&card->lock);
1529         spin_lock_init(&card->thread_mask_lock);
1530         mutex_init(&card->conf_mutex);
1531         mutex_init(&card->discipline_mutex);
1532         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1533         INIT_LIST_HEAD(&card->cmd_waiter_list);
1534         init_waitqueue_head(&card->wait_q);
1535         qeth_set_initial_options(card);
1536         /* IP address takeover */
1537         INIT_LIST_HEAD(&card->ipato.entries);
1538         qeth_init_qdio_info(card);
1539         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1540         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1541         hash_init(card->rx_mode_addrs);
1542         hash_init(card->local_addrs4);
1543         hash_init(card->local_addrs6);
1544         spin_lock_init(&card->local_addrs4_lock);
1545         spin_lock_init(&card->local_addrs6_lock);
1546 }
1547
1548 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1549 {
1550         struct qeth_card *card = container_of(slr, struct qeth_card,
1551                                         qeth_service_level);
1552         if (card->info.mcl_level[0])
1553                 seq_printf(m, "qeth: %s firmware level %s\n",
1554                         CARD_BUS_ID(card), card->info.mcl_level);
1555 }
1556
1557 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1558 {
1559         struct qeth_card *card;
1560
1561         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1562         card = kzalloc(sizeof(*card), GFP_KERNEL);
1563         if (!card)
1564                 goto out;
1565         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1566
1567         card->gdev = gdev;
1568         dev_set_drvdata(&gdev->dev, card);
1569         CARD_RDEV(card) = gdev->cdev[0];
1570         CARD_WDEV(card) = gdev->cdev[1];
1571         CARD_DDEV(card) = gdev->cdev[2];
1572
1573         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1574                                                  dev_name(&gdev->dev));
1575         if (!card->event_wq)
1576                 goto out_wq;
1577
1578         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1579         if (!card->read_cmd)
1580                 goto out_read_cmd;
1581
1582         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1583                                            qeth_debugfs_root);
1584         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1585                             &qeth_debugfs_local_addr_fops);
1586
1587         card->qeth_service_level.seq_print = qeth_core_sl_print;
1588         register_service_level(&card->qeth_service_level);
1589         return card;
1590
1591 out_read_cmd:
1592         destroy_workqueue(card->event_wq);
1593 out_wq:
1594         dev_set_drvdata(&gdev->dev, NULL);
1595         kfree(card);
1596 out:
1597         return NULL;
1598 }
1599
1600 static int qeth_clear_channel(struct qeth_card *card,
1601                               struct qeth_channel *channel)
1602 {
1603         int rc;
1604
1605         QETH_CARD_TEXT(card, 3, "clearch");
1606         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1607         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1608         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1609
1610         if (rc)
1611                 return rc;
1612         rc = wait_event_interruptible_timeout(card->wait_q,
1613                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1614         if (rc == -ERESTARTSYS)
1615                 return rc;
1616         if (channel->state != CH_STATE_STOPPED)
1617                 return -ETIME;
1618         channel->state = CH_STATE_DOWN;
1619         return 0;
1620 }
1621
1622 static int qeth_halt_channel(struct qeth_card *card,
1623                              struct qeth_channel *channel)
1624 {
1625         int rc;
1626
1627         QETH_CARD_TEXT(card, 3, "haltch");
1628         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1629         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1630         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1631
1632         if (rc)
1633                 return rc;
1634         rc = wait_event_interruptible_timeout(card->wait_q,
1635                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1636         if (rc == -ERESTARTSYS)
1637                 return rc;
1638         if (channel->state != CH_STATE_HALTED)
1639                 return -ETIME;
1640         return 0;
1641 }
1642
1643 static int qeth_stop_channel(struct qeth_channel *channel)
1644 {
1645         struct ccw_device *cdev = channel->ccwdev;
1646         int rc;
1647
1648         rc = ccw_device_set_offline(cdev);
1649
1650         spin_lock_irq(get_ccwdev_lock(cdev));
1651         if (channel->active_cmd)
1652                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1653                         channel->active_cmd);
1654
1655         cdev->handler = NULL;
1656         spin_unlock_irq(get_ccwdev_lock(cdev));
1657
1658         return rc;
1659 }
1660
1661 static int qeth_start_channel(struct qeth_channel *channel)
1662 {
1663         struct ccw_device *cdev = channel->ccwdev;
1664         int rc;
1665
1666         channel->state = CH_STATE_DOWN;
1667         xchg(&channel->active_cmd, NULL);
1668
1669         spin_lock_irq(get_ccwdev_lock(cdev));
1670         cdev->handler = qeth_irq;
1671         spin_unlock_irq(get_ccwdev_lock(cdev));
1672
1673         rc = ccw_device_set_online(cdev);
1674         if (rc)
1675                 goto err;
1676
1677         return 0;
1678
1679 err:
1680         spin_lock_irq(get_ccwdev_lock(cdev));
1681         cdev->handler = NULL;
1682         spin_unlock_irq(get_ccwdev_lock(cdev));
1683         return rc;
1684 }
1685
1686 static int qeth_halt_channels(struct qeth_card *card)
1687 {
1688         int rc1 = 0, rc2 = 0, rc3 = 0;
1689
1690         QETH_CARD_TEXT(card, 3, "haltchs");
1691         rc1 = qeth_halt_channel(card, &card->read);
1692         rc2 = qeth_halt_channel(card, &card->write);
1693         rc3 = qeth_halt_channel(card, &card->data);
1694         if (rc1)
1695                 return rc1;
1696         if (rc2)
1697                 return rc2;
1698         return rc3;
1699 }
1700
1701 static int qeth_clear_channels(struct qeth_card *card)
1702 {
1703         int rc1 = 0, rc2 = 0, rc3 = 0;
1704
1705         QETH_CARD_TEXT(card, 3, "clearchs");
1706         rc1 = qeth_clear_channel(card, &card->read);
1707         rc2 = qeth_clear_channel(card, &card->write);
1708         rc3 = qeth_clear_channel(card, &card->data);
1709         if (rc1)
1710                 return rc1;
1711         if (rc2)
1712                 return rc2;
1713         return rc3;
1714 }
1715
1716 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1717 {
1718         int rc = 0;
1719
1720         QETH_CARD_TEXT(card, 3, "clhacrd");
1721
1722         if (halt)
1723                 rc = qeth_halt_channels(card);
1724         if (rc)
1725                 return rc;
1726         return qeth_clear_channels(card);
1727 }
1728
1729 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1730 {
1731         int rc = 0;
1732
1733         QETH_CARD_TEXT(card, 3, "qdioclr");
1734         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1735                 QETH_QDIO_CLEANING)) {
1736         case QETH_QDIO_ESTABLISHED:
1737                 if (IS_IQD(card))
1738                         rc = qdio_shutdown(CARD_DDEV(card),
1739                                 QDIO_FLAG_CLEANUP_USING_HALT);
1740                 else
1741                         rc = qdio_shutdown(CARD_DDEV(card),
1742                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1743                 if (rc)
1744                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1745                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1746                 break;
1747         case QETH_QDIO_CLEANING:
1748                 return rc;
1749         default:
1750                 break;
1751         }
1752         rc = qeth_clear_halt_card(card, use_halt);
1753         if (rc)
1754                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1755         return rc;
1756 }
1757
1758 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1759 {
1760         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1761         struct diag26c_vnic_resp *response = NULL;
1762         struct diag26c_vnic_req *request = NULL;
1763         struct ccw_dev_id id;
1764         char userid[80];
1765         int rc = 0;
1766
1767         QETH_CARD_TEXT(card, 2, "vmlayer");
1768
1769         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1770         if (rc)
1771                 goto out;
1772
1773         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1774         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1775         if (!request || !response) {
1776                 rc = -ENOMEM;
1777                 goto out;
1778         }
1779
1780         ccw_device_get_id(CARD_RDEV(card), &id);
1781         request->resp_buf_len = sizeof(*response);
1782         request->resp_version = DIAG26C_VERSION6_VM65918;
1783         request->req_format = DIAG26C_VNIC_INFO;
1784         ASCEBC(userid, 8);
1785         memcpy(&request->sys_name, userid, 8);
1786         request->devno = id.devno;
1787
1788         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1789         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1790         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1791         if (rc)
1792                 goto out;
1793         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1794
1795         if (request->resp_buf_len < sizeof(*response) ||
1796             response->version != request->resp_version) {
1797                 rc = -EIO;
1798                 goto out;
1799         }
1800
1801         if (response->protocol == VNIC_INFO_PROT_L2)
1802                 disc = QETH_DISCIPLINE_LAYER2;
1803         else if (response->protocol == VNIC_INFO_PROT_L3)
1804                 disc = QETH_DISCIPLINE_LAYER3;
1805
1806 out:
1807         kfree(response);
1808         kfree(request);
1809         if (rc)
1810                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1811         return disc;
1812 }
1813
1814 /* Determine whether the device requires a specific layer discipline */
1815 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1816 {
1817         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1818
1819         if (IS_OSM(card))
1820                 disc = QETH_DISCIPLINE_LAYER2;
1821         else if (IS_VM_NIC(card))
1822                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1823                                       qeth_vm_detect_layer(card);
1824
1825         switch (disc) {
1826         case QETH_DISCIPLINE_LAYER2:
1827                 QETH_CARD_TEXT(card, 3, "force l2");
1828                 break;
1829         case QETH_DISCIPLINE_LAYER3:
1830                 QETH_CARD_TEXT(card, 3, "force l3");
1831                 break;
1832         default:
1833                 QETH_CARD_TEXT(card, 3, "force no");
1834         }
1835
1836         return disc;
1837 }
1838
1839 static void qeth_set_blkt_defaults(struct qeth_card *card)
1840 {
1841         QETH_CARD_TEXT(card, 2, "cfgblkt");
1842
1843         if (card->info.use_v1_blkt) {
1844                 card->info.blkt.time_total = 0;
1845                 card->info.blkt.inter_packet = 0;
1846                 card->info.blkt.inter_packet_jumbo = 0;
1847         } else {
1848                 card->info.blkt.time_total = 250;
1849                 card->info.blkt.inter_packet = 5;
1850                 card->info.blkt.inter_packet_jumbo = 15;
1851         }
1852 }
1853
1854 static void qeth_idx_init(struct qeth_card *card)
1855 {
1856         memset(&card->seqno, 0, sizeof(card->seqno));
1857
1858         card->token.issuer_rm_w = 0x00010103UL;
1859         card->token.cm_filter_w = 0x00010108UL;
1860         card->token.cm_connection_w = 0x0001010aUL;
1861         card->token.ulp_filter_w = 0x0001010bUL;
1862         card->token.ulp_connection_w = 0x0001010dUL;
1863
1864         switch (card->info.type) {
1865         case QETH_CARD_TYPE_IQD:
1866                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1867                 break;
1868         case QETH_CARD_TYPE_OSD:
1869                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1870                 break;
1871         default:
1872                 break;
1873         }
1874 }
1875
1876 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1877                                   struct qeth_cmd_buffer *iob)
1878 {
1879         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1880                QETH_SEQ_NO_LENGTH);
1881         if (iob->channel == &card->write)
1882                 card->seqno.trans_hdr++;
1883 }
1884
1885 static int qeth_peer_func_level(int level)
1886 {
1887         if ((level & 0xff) == 8)
1888                 return (level & 0xff) + 0x400;
1889         if (((level >> 8) & 3) == 1)
1890                 return (level & 0xff) + 0x200;
1891         return level;
1892 }
1893
1894 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1895                                   struct qeth_cmd_buffer *iob)
1896 {
1897         qeth_idx_finalize_cmd(card, iob);
1898
1899         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1900                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1901         card->seqno.pdu_hdr++;
1902         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1903                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1904
1905         iob->callback = qeth_release_buffer_cb;
1906 }
1907
1908 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1909                                  struct qeth_cmd_buffer *reply)
1910 {
1911         /* MPC cmds are issued strictly in sequence. */
1912         return !IS_IPA(reply->data);
1913 }
1914
1915 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1916                                                   const void *data,
1917                                                   unsigned int data_length)
1918 {
1919         struct qeth_cmd_buffer *iob;
1920
1921         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1922         if (!iob)
1923                 return NULL;
1924
1925         memcpy(iob->data, data, data_length);
1926         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1927                        iob->data);
1928         iob->finalize = qeth_mpc_finalize_cmd;
1929         iob->match = qeth_mpc_match_reply;
1930         return iob;
1931 }
1932
1933 /**
1934  * qeth_send_control_data() -   send control command to the card
1935  * @card:                       qeth_card structure pointer
1936  * @iob:                        qeth_cmd_buffer pointer
1937  * @reply_cb:                   callback function pointer
1938  * @cb_card:                    pointer to the qeth_card structure
1939  * @cb_reply:                   pointer to the qeth_reply structure
1940  * @cb_cmd:                     pointer to the original iob for non-IPA
1941  *                              commands, or to the qeth_ipa_cmd structure
1942  *                              for the IPA commands.
1943  * @reply_param:                private pointer passed to the callback
1944  *
1945  * Callback function gets called one or more times, with cb_cmd
1946  * pointing to the response returned by the hardware. Callback
1947  * function must return
1948  *   > 0 if more reply blocks are expected,
1949  *     0 if the last or only reply block is received, and
1950  *   < 0 on error.
1951  * Callback function can get the value of the reply_param pointer from the
1952  * field 'param' of the structure qeth_reply.
1953  */
1954
1955 static int qeth_send_control_data(struct qeth_card *card,
1956                                   struct qeth_cmd_buffer *iob,
1957                                   int (*reply_cb)(struct qeth_card *cb_card,
1958                                                   struct qeth_reply *cb_reply,
1959                                                   unsigned long cb_cmd),
1960                                   void *reply_param)
1961 {
1962         struct qeth_channel *channel = iob->channel;
1963         struct qeth_reply *reply = &iob->reply;
1964         long timeout = iob->timeout;
1965         int rc;
1966
1967         QETH_CARD_TEXT(card, 2, "sendctl");
1968
1969         reply->callback = reply_cb;
1970         reply->param = reply_param;
1971
1972         timeout = wait_event_interruptible_timeout(card->wait_q,
1973                                                    qeth_trylock_channel(channel, iob),
1974                                                    timeout);
1975         if (timeout <= 0) {
1976                 qeth_put_cmd(iob);
1977                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1978         }
1979
1980         if (iob->finalize)
1981                 iob->finalize(card, iob);
1982         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1983
1984         qeth_enqueue_cmd(card, iob);
1985
1986         /* This pairs with iob->callback, and keeps the iob alive after IO: */
1987         qeth_get_cmd(iob);
1988
1989         QETH_CARD_TEXT(card, 6, "noirqpnd");
1990         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1991         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1992                                       (addr_t) iob, 0, 0, timeout);
1993         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1994         if (rc) {
1995                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1996                                  CARD_DEVID(card), rc);
1997                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1998                 qeth_dequeue_cmd(card, iob);
1999                 qeth_put_cmd(iob);
2000                 qeth_unlock_channel(card, channel);
2001                 goto out;
2002         }
2003
2004         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2005                                                             timeout);
2006         if (timeout <= 0)
2007                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2008
2009         qeth_dequeue_cmd(card, iob);
2010
2011         if (reply_cb) {
2012                 /* Wait until the callback for a late reply has completed: */
2013                 spin_lock_irq(&iob->lock);
2014                 if (rc)
2015                         /* Zap any callback that's still pending: */
2016                         iob->rc = rc;
2017                 spin_unlock_irq(&iob->lock);
2018         }
2019
2020         if (!rc)
2021                 rc = iob->rc;
2022
2023 out:
2024         qeth_put_cmd(iob);
2025         return rc;
2026 }
2027
2028 struct qeth_node_desc {
2029         struct node_descriptor nd1;
2030         struct node_descriptor nd2;
2031         struct node_descriptor nd3;
2032 };
2033
2034 static void qeth_read_conf_data_cb(struct qeth_card *card,
2035                                    struct qeth_cmd_buffer *iob,
2036                                    unsigned int data_length)
2037 {
2038         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2039         int rc = 0;
2040         u8 *tag;
2041
2042         QETH_CARD_TEXT(card, 2, "cfgunit");
2043
2044         if (data_length < sizeof(*nd)) {
2045                 rc = -EINVAL;
2046                 goto out;
2047         }
2048
2049         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2050                                nd->nd1.plant[1] == _ascebc['M'];
2051         tag = (u8 *)&nd->nd1.tag;
2052         card->info.chpid = tag[0];
2053         card->info.unit_addr2 = tag[1];
2054
2055         tag = (u8 *)&nd->nd2.tag;
2056         card->info.cula = tag[1];
2057
2058         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2059                                  nd->nd3.model[1] == 0xF0 &&
2060                                  nd->nd3.model[2] >= 0xF1 &&
2061                                  nd->nd3.model[2] <= 0xF4;
2062
2063 out:
2064         qeth_notify_cmd(iob, rc);
2065         qeth_put_cmd(iob);
2066 }
2067
2068 static int qeth_read_conf_data(struct qeth_card *card)
2069 {
2070         struct qeth_channel *channel = &card->data;
2071         struct qeth_cmd_buffer *iob;
2072         struct ciw *ciw;
2073
2074         /* scan for RCD command in extended SenseID data */
2075         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2076         if (!ciw || ciw->cmd == 0)
2077                 return -EOPNOTSUPP;
2078         if (ciw->count < sizeof(struct qeth_node_desc))
2079                 return -EINVAL;
2080
2081         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2082         if (!iob)
2083                 return -ENOMEM;
2084
2085         iob->callback = qeth_read_conf_data_cb;
2086         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2087                        iob->data);
2088
2089         return qeth_send_control_data(card, iob, NULL, NULL);
2090 }
2091
2092 static int qeth_idx_check_activate_response(struct qeth_card *card,
2093                                             struct qeth_channel *channel,
2094                                             struct qeth_cmd_buffer *iob)
2095 {
2096         int rc;
2097
2098         rc = qeth_check_idx_response(card, iob->data);
2099         if (rc)
2100                 return rc;
2101
2102         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2103                 return 0;
2104
2105         /* negative reply: */
2106         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2107                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2108
2109         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2110         case QETH_IDX_ACT_ERR_EXCL:
2111                 dev_err(&channel->ccwdev->dev,
2112                         "The adapter is used exclusively by another host\n");
2113                 return -EBUSY;
2114         case QETH_IDX_ACT_ERR_AUTH:
2115         case QETH_IDX_ACT_ERR_AUTH_USER:
2116                 dev_err(&channel->ccwdev->dev,
2117                         "Setting the device online failed because of insufficient authorization\n");
2118                 return -EPERM;
2119         default:
2120                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2121                                  CCW_DEVID(channel->ccwdev));
2122                 return -EIO;
2123         }
2124 }
2125
2126 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2127                                               struct qeth_cmd_buffer *iob,
2128                                               unsigned int data_length)
2129 {
2130         struct qeth_channel *channel = iob->channel;
2131         u16 peer_level;
2132         int rc;
2133
2134         QETH_CARD_TEXT(card, 2, "idxrdcb");
2135
2136         rc = qeth_idx_check_activate_response(card, channel, iob);
2137         if (rc)
2138                 goto out;
2139
2140         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2141         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2142                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2143                                  CCW_DEVID(channel->ccwdev),
2144                                  card->info.func_level, peer_level);
2145                 rc = -EINVAL;
2146                 goto out;
2147         }
2148
2149         memcpy(&card->token.issuer_rm_r,
2150                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2151                QETH_MPC_TOKEN_LENGTH);
2152         memcpy(&card->info.mcl_level[0],
2153                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2154
2155 out:
2156         qeth_notify_cmd(iob, rc);
2157         qeth_put_cmd(iob);
2158 }
2159
2160 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2161                                                struct qeth_cmd_buffer *iob,
2162                                                unsigned int data_length)
2163 {
2164         struct qeth_channel *channel = iob->channel;
2165         u16 peer_level;
2166         int rc;
2167
2168         QETH_CARD_TEXT(card, 2, "idxwrcb");
2169
2170         rc = qeth_idx_check_activate_response(card, channel, iob);
2171         if (rc)
2172                 goto out;
2173
2174         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2175         if ((peer_level & ~0x0100) !=
2176             qeth_peer_func_level(card->info.func_level)) {
2177                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2178                                  CCW_DEVID(channel->ccwdev),
2179                                  card->info.func_level, peer_level);
2180                 rc = -EINVAL;
2181         }
2182
2183 out:
2184         qeth_notify_cmd(iob, rc);
2185         qeth_put_cmd(iob);
2186 }
2187
2188 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2189                                         struct qeth_cmd_buffer *iob)
2190 {
2191         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2192         u8 port = ((u8)card->dev->dev_port) | 0x80;
2193         struct ccw1 *ccw = __ccw_from_cmd(iob);
2194
2195         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2196                        iob->data);
2197         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2198         iob->finalize = qeth_idx_finalize_cmd;
2199
2200         port |= QETH_IDX_ACT_INVAL_FRAME;
2201         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2202         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2203                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2204         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2205                &card->info.func_level, 2);
2206         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2207         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2208 }
2209
2210 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2211 {
2212         struct qeth_channel *channel = &card->read;
2213         struct qeth_cmd_buffer *iob;
2214         int rc;
2215
2216         QETH_CARD_TEXT(card, 2, "idxread");
2217
2218         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2219         if (!iob)
2220                 return -ENOMEM;
2221
2222         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2223         qeth_idx_setup_activate_cmd(card, iob);
2224         iob->callback = qeth_idx_activate_read_channel_cb;
2225
2226         rc = qeth_send_control_data(card, iob, NULL, NULL);
2227         if (rc)
2228                 return rc;
2229
2230         channel->state = CH_STATE_UP;
2231         return 0;
2232 }
2233
2234 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2235 {
2236         struct qeth_channel *channel = &card->write;
2237         struct qeth_cmd_buffer *iob;
2238         int rc;
2239
2240         QETH_CARD_TEXT(card, 2, "idxwrite");
2241
2242         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2243         if (!iob)
2244                 return -ENOMEM;
2245
2246         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2247         qeth_idx_setup_activate_cmd(card, iob);
2248         iob->callback = qeth_idx_activate_write_channel_cb;
2249
2250         rc = qeth_send_control_data(card, iob, NULL, NULL);
2251         if (rc)
2252                 return rc;
2253
2254         channel->state = CH_STATE_UP;
2255         return 0;
2256 }
2257
2258 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2259                 unsigned long data)
2260 {
2261         struct qeth_cmd_buffer *iob;
2262
2263         QETH_CARD_TEXT(card, 2, "cmenblcb");
2264
2265         iob = (struct qeth_cmd_buffer *) data;
2266         memcpy(&card->token.cm_filter_r,
2267                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2268                QETH_MPC_TOKEN_LENGTH);
2269         return 0;
2270 }
2271
2272 static int qeth_cm_enable(struct qeth_card *card)
2273 {
2274         struct qeth_cmd_buffer *iob;
2275
2276         QETH_CARD_TEXT(card, 2, "cmenable");
2277
2278         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2279         if (!iob)
2280                 return -ENOMEM;
2281
2282         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2283                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2284         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2285                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2286
2287         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2288 }
2289
2290 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2291                 unsigned long data)
2292 {
2293         struct qeth_cmd_buffer *iob;
2294
2295         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2296
2297         iob = (struct qeth_cmd_buffer *) data;
2298         memcpy(&card->token.cm_connection_r,
2299                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2300                QETH_MPC_TOKEN_LENGTH);
2301         return 0;
2302 }
2303
2304 static int qeth_cm_setup(struct qeth_card *card)
2305 {
2306         struct qeth_cmd_buffer *iob;
2307
2308         QETH_CARD_TEXT(card, 2, "cmsetup");
2309
2310         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2311         if (!iob)
2312                 return -ENOMEM;
2313
2314         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2315                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2316         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2317                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2318         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2319                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2320         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2321 }
2322
2323 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2324 {
2325         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2326             link_type == QETH_LINK_TYPE_HSTR) {
2327                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2328                 return false;
2329         }
2330
2331         return true;
2332 }
2333
2334 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2335 {
2336         struct net_device *dev = card->dev;
2337         unsigned int new_mtu;
2338
2339         if (!max_mtu) {
2340                 /* IQD needs accurate max MTU to set up its RX buffers: */
2341                 if (IS_IQD(card))
2342                         return -EINVAL;
2343                 /* tolerate quirky HW: */
2344                 max_mtu = ETH_MAX_MTU;
2345         }
2346
2347         rtnl_lock();
2348         if (IS_IQD(card)) {
2349                 /* move any device with default MTU to new max MTU: */
2350                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2351
2352                 /* adjust RX buffer size to new max MTU: */
2353                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2354                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2355                         qeth_free_qdio_queues(card);
2356         } else {
2357                 if (dev->mtu)
2358                         new_mtu = dev->mtu;
2359                 /* default MTUs for first setup: */
2360                 else if (IS_LAYER2(card))
2361                         new_mtu = ETH_DATA_LEN;
2362                 else
2363                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2364         }
2365
2366         dev->max_mtu = max_mtu;
2367         dev->mtu = min(new_mtu, max_mtu);
2368         rtnl_unlock();
2369         return 0;
2370 }
2371
2372 static int qeth_get_mtu_outof_framesize(int framesize)
2373 {
2374         switch (framesize) {
2375         case 0x4000:
2376                 return 8192;
2377         case 0x6000:
2378                 return 16384;
2379         case 0xa000:
2380                 return 32768;
2381         case 0xffff:
2382                 return 57344;
2383         default:
2384                 return 0;
2385         }
2386 }
2387
2388 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2389                 unsigned long data)
2390 {
2391         __u16 mtu, framesize;
2392         __u16 len;
2393         struct qeth_cmd_buffer *iob;
2394         u8 link_type = 0;
2395
2396         QETH_CARD_TEXT(card, 2, "ulpenacb");
2397
2398         iob = (struct qeth_cmd_buffer *) data;
2399         memcpy(&card->token.ulp_filter_r,
2400                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2401                QETH_MPC_TOKEN_LENGTH);
2402         if (IS_IQD(card)) {
2403                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2404                 mtu = qeth_get_mtu_outof_framesize(framesize);
2405         } else {
2406                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2407         }
2408         *(u16 *)reply->param = mtu;
2409
2410         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2411         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2412                 memcpy(&link_type,
2413                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2414                 if (!qeth_is_supported_link_type(card, link_type))
2415                         return -EPROTONOSUPPORT;
2416         }
2417
2418         card->info.link_type = link_type;
2419         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2420         return 0;
2421 }
2422
2423 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2424 {
2425         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2426 }
2427
2428 static int qeth_ulp_enable(struct qeth_card *card)
2429 {
2430         u8 prot_type = qeth_mpc_select_prot_type(card);
2431         struct qeth_cmd_buffer *iob;
2432         u16 max_mtu;
2433         int rc;
2434
2435         QETH_CARD_TEXT(card, 2, "ulpenabl");
2436
2437         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2438         if (!iob)
2439                 return -ENOMEM;
2440
2441         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2442         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2443         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2444                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2445         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2446                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2447         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2448         if (rc)
2449                 return rc;
2450         return qeth_update_max_mtu(card, max_mtu);
2451 }
2452
2453 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2454                 unsigned long data)
2455 {
2456         struct qeth_cmd_buffer *iob;
2457
2458         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2459
2460         iob = (struct qeth_cmd_buffer *) data;
2461         memcpy(&card->token.ulp_connection_r,
2462                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2463                QETH_MPC_TOKEN_LENGTH);
2464         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2465                      3)) {
2466                 QETH_CARD_TEXT(card, 2, "olmlimit");
2467                 dev_err(&card->gdev->dev, "A connection could not be "
2468                         "established because of an OLM limit\n");
2469                 return -EMLINK;
2470         }
2471         return 0;
2472 }
2473
2474 static int qeth_ulp_setup(struct qeth_card *card)
2475 {
2476         __u16 temp;
2477         struct qeth_cmd_buffer *iob;
2478
2479         QETH_CARD_TEXT(card, 2, "ulpsetup");
2480
2481         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2482         if (!iob)
2483                 return -ENOMEM;
2484
2485         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2486                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2487         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2488                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2489         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2490                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2491
2492         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2493         temp = (card->info.cula << 8) + card->info.unit_addr2;
2494         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2495         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2496 }
2497
2498 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2499                               gfp_t gfp)
2500 {
2501         struct qeth_qdio_out_buffer *newbuf;
2502
2503         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2504         if (!newbuf)
2505                 return -ENOMEM;
2506
2507         newbuf->buffer = q->qdio_bufs[bidx];
2508         skb_queue_head_init(&newbuf->skb_list);
2509         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2510         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2511         q->bufs[bidx] = newbuf;
2512         return 0;
2513 }
2514
2515 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2516 {
2517         if (!q)
2518                 return;
2519
2520         qeth_drain_output_queue(q, true);
2521         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2522         kfree(q);
2523 }
2524
2525 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2526 {
2527         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2528         unsigned int i;
2529
2530         if (!q)
2531                 return NULL;
2532
2533         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2534                 goto err_qdio_bufs;
2535
2536         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2537                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2538                         goto err_out_bufs;
2539         }
2540
2541         return q;
2542
2543 err_out_bufs:
2544         while (i > 0)
2545                 qeth_free_out_buf(q->bufs[--i]);
2546         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2547 err_qdio_bufs:
2548         kfree(q);
2549         return NULL;
2550 }
2551
2552 static void qeth_tx_completion_timer(struct timer_list *timer)
2553 {
2554         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2555
2556         napi_schedule(&queue->napi);
2557         QETH_TXQ_STAT_INC(queue, completion_timer);
2558 }
2559
2560 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2561 {
2562         unsigned int i;
2563
2564         QETH_CARD_TEXT(card, 2, "allcqdbf");
2565
2566         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2567                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2568                 return 0;
2569
2570         QETH_CARD_TEXT(card, 2, "inq");
2571         card->qdio.in_q = qeth_alloc_qdio_queue();
2572         if (!card->qdio.in_q)
2573                 goto out_nomem;
2574
2575         /* inbound buffer pool */
2576         if (qeth_alloc_buffer_pool(card))
2577                 goto out_freeinq;
2578
2579         /* outbound */
2580         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2581                 struct qeth_qdio_out_q *queue;
2582
2583                 queue = qeth_alloc_output_queue();
2584                 if (!queue)
2585                         goto out_freeoutq;
2586                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2587                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2588                 card->qdio.out_qs[i] = queue;
2589                 queue->card = card;
2590                 queue->queue_no = i;
2591                 INIT_LIST_HEAD(&queue->pending_bufs);
2592                 spin_lock_init(&queue->lock);
2593                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2594                 if (IS_IQD(card)) {
2595                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2596                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2597                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2598                 } else {
2599                         queue->coalesce_usecs = USEC_PER_SEC;
2600                         queue->max_coalesced_frames = 0;
2601                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2602                 }
2603                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2604         }
2605
2606         /* completion */
2607         if (qeth_alloc_cq(card))
2608                 goto out_freeoutq;
2609
2610         return 0;
2611
2612 out_freeoutq:
2613         while (i > 0) {
2614                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2615                 card->qdio.out_qs[i] = NULL;
2616         }
2617         qeth_free_buffer_pool(card);
2618 out_freeinq:
2619         qeth_free_qdio_queue(card->qdio.in_q);
2620         card->qdio.in_q = NULL;
2621 out_nomem:
2622         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2623         return -ENOMEM;
2624 }
2625
2626 static void qeth_free_qdio_queues(struct qeth_card *card)
2627 {
2628         int i, j;
2629
2630         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2631                 QETH_QDIO_UNINITIALIZED)
2632                 return;
2633
2634         qeth_free_cq(card);
2635         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2636                 if (card->qdio.in_q->bufs[j].rx_skb)
2637                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2638         }
2639         qeth_free_qdio_queue(card->qdio.in_q);
2640         card->qdio.in_q = NULL;
2641         /* inbound buffer pool */
2642         qeth_free_buffer_pool(card);
2643         /* free outbound qdio_qs */
2644         for (i = 0; i < card->qdio.no_out_queues; i++) {
2645                 qeth_free_output_queue(card->qdio.out_qs[i]);
2646                 card->qdio.out_qs[i] = NULL;
2647         }
2648 }
2649
2650 static void qeth_fill_qib_parms(struct qeth_card *card,
2651                                 struct qeth_qib_parms *parms)
2652 {
2653         struct qeth_qdio_out_q *queue;
2654         unsigned int i;
2655
2656         parms->pcit_magic[0] = 'P';
2657         parms->pcit_magic[1] = 'C';
2658         parms->pcit_magic[2] = 'I';
2659         parms->pcit_magic[3] = 'T';
2660         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2661         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2662         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2663         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2664
2665         parms->blkt_magic[0] = 'B';
2666         parms->blkt_magic[1] = 'L';
2667         parms->blkt_magic[2] = 'K';
2668         parms->blkt_magic[3] = 'T';
2669         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2670         parms->blkt_total = card->info.blkt.time_total;
2671         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2672         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2673
2674         /* Prio-queueing implicitly uses the default priorities: */
2675         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2676                 return;
2677
2678         parms->pque_magic[0] = 'P';
2679         parms->pque_magic[1] = 'Q';
2680         parms->pque_magic[2] = 'U';
2681         parms->pque_magic[3] = 'E';
2682         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2683         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2684         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2685
2686         qeth_for_each_output_queue(card, queue, i)
2687                 parms->pque_priority[i] = queue->priority;
2688 }
2689
2690 static int qeth_qdio_activate(struct qeth_card *card)
2691 {
2692         QETH_CARD_TEXT(card, 3, "qdioact");
2693         return qdio_activate(CARD_DDEV(card));
2694 }
2695
2696 static int qeth_dm_act(struct qeth_card *card)
2697 {
2698         struct qeth_cmd_buffer *iob;
2699
2700         QETH_CARD_TEXT(card, 2, "dmact");
2701
2702         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2703         if (!iob)
2704                 return -ENOMEM;
2705
2706         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2707                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2708         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2709                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2710         return qeth_send_control_data(card, iob, NULL, NULL);
2711 }
2712
2713 static int qeth_mpc_initialize(struct qeth_card *card)
2714 {
2715         int rc;
2716
2717         QETH_CARD_TEXT(card, 2, "mpcinit");
2718
2719         rc = qeth_issue_next_read(card);
2720         if (rc) {
2721                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2722                 return rc;
2723         }
2724         rc = qeth_cm_enable(card);
2725         if (rc) {
2726                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2727                 return rc;
2728         }
2729         rc = qeth_cm_setup(card);
2730         if (rc) {
2731                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2732                 return rc;
2733         }
2734         rc = qeth_ulp_enable(card);
2735         if (rc) {
2736                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2737                 return rc;
2738         }
2739         rc = qeth_ulp_setup(card);
2740         if (rc) {
2741                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2742                 return rc;
2743         }
2744         rc = qeth_alloc_qdio_queues(card);
2745         if (rc) {
2746                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2747                 return rc;
2748         }
2749         rc = qeth_qdio_establish(card);
2750         if (rc) {
2751                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2752                 qeth_free_qdio_queues(card);
2753                 return rc;
2754         }
2755         rc = qeth_qdio_activate(card);
2756         if (rc) {
2757                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2758                 return rc;
2759         }
2760         rc = qeth_dm_act(card);
2761         if (rc) {
2762                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2763                 return rc;
2764         }
2765
2766         return 0;
2767 }
2768
2769 static void qeth_print_status_message(struct qeth_card *card)
2770 {
2771         switch (card->info.type) {
2772         case QETH_CARD_TYPE_OSD:
2773         case QETH_CARD_TYPE_OSM:
2774         case QETH_CARD_TYPE_OSX:
2775                 /* VM will use a non-zero first character
2776                  * to indicate a HiperSockets like reporting
2777                  * of the level OSA sets the first character to zero
2778                  * */
2779                 if (!card->info.mcl_level[0]) {
2780                         sprintf(card->info.mcl_level, "%02x%02x",
2781                                 card->info.mcl_level[2],
2782                                 card->info.mcl_level[3]);
2783                         break;
2784                 }
2785                 fallthrough;
2786         case QETH_CARD_TYPE_IQD:
2787                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2788                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2789                                 card->info.mcl_level[0]];
2790                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2791                                 card->info.mcl_level[1]];
2792                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2793                                 card->info.mcl_level[2]];
2794                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2795                                 card->info.mcl_level[3]];
2796                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2797                 }
2798                 break;
2799         default:
2800                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2801         }
2802         dev_info(&card->gdev->dev,
2803                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2804                  qeth_get_cardname(card),
2805                  (card->info.mcl_level[0]) ? " (level: " : "",
2806                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2807                  (card->info.mcl_level[0]) ? ")" : "",
2808                  qeth_get_cardname_short(card));
2809 }
2810
2811 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2812 {
2813         struct qeth_buffer_pool_entry *entry;
2814
2815         QETH_CARD_TEXT(card, 5, "inwrklst");
2816
2817         list_for_each_entry(entry,
2818                             &card->qdio.init_pool.entry_list, init_list) {
2819                 qeth_put_buffer_pool_entry(card, entry);
2820         }
2821 }
2822
2823 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2824                                         struct qeth_card *card)
2825 {
2826         struct qeth_buffer_pool_entry *entry;
2827         int i, free;
2828
2829         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2830                 return NULL;
2831
2832         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2833                 free = 1;
2834                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2835                         if (page_count(entry->elements[i]) > 1) {
2836                                 free = 0;
2837                                 break;
2838                         }
2839                 }
2840                 if (free) {
2841                         list_del_init(&entry->list);
2842                         return entry;
2843                 }
2844         }
2845
2846         /* no free buffer in pool so take first one and swap pages */
2847         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2848                                  struct qeth_buffer_pool_entry, list);
2849         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2850                 if (page_count(entry->elements[i]) > 1) {
2851                         struct page *page = dev_alloc_page();
2852
2853                         if (!page)
2854                                 return NULL;
2855
2856                         __free_page(entry->elements[i]);
2857                         entry->elements[i] = page;
2858                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2859                 }
2860         }
2861         list_del_init(&entry->list);
2862         return entry;
2863 }
2864
2865 static int qeth_init_input_buffer(struct qeth_card *card,
2866                 struct qeth_qdio_buffer *buf)
2867 {
2868         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2869         int i;
2870
2871         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2872                 buf->rx_skb = netdev_alloc_skb(card->dev,
2873                                                ETH_HLEN +
2874                                                sizeof(struct ipv6hdr));
2875                 if (!buf->rx_skb)
2876                         return -ENOMEM;
2877         }
2878
2879         if (!pool_entry) {
2880                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2881                 if (!pool_entry)
2882                         return -ENOBUFS;
2883
2884                 buf->pool_entry = pool_entry;
2885         }
2886
2887         /*
2888          * since the buffer is accessed only from the input_tasklet
2889          * there shouldn't be a need to synchronize; also, since we use
2890          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2891          * buffers
2892          */
2893         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2894                 buf->buffer->element[i].length = PAGE_SIZE;
2895                 buf->buffer->element[i].addr =
2896                         page_to_phys(pool_entry->elements[i]);
2897                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2898                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2899                 else
2900                         buf->buffer->element[i].eflags = 0;
2901                 buf->buffer->element[i].sflags = 0;
2902         }
2903         return 0;
2904 }
2905
2906 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2907                                             struct qeth_qdio_out_q *queue)
2908 {
2909         if (!IS_IQD(card) ||
2910             qeth_iqd_is_mcast_queue(card, queue) ||
2911             card->options.cq == QETH_CQ_ENABLED ||
2912             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2913                 return 1;
2914
2915         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2916 }
2917
2918 static int qeth_init_qdio_queues(struct qeth_card *card)
2919 {
2920         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2921         unsigned int i;
2922         int rc;
2923
2924         QETH_CARD_TEXT(card, 2, "initqdqs");
2925
2926         /* inbound queue */
2927         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2928         memset(&card->rx, 0, sizeof(struct qeth_rx));
2929
2930         qeth_initialize_working_pool_list(card);
2931         /*give only as many buffers to hardware as we have buffer pool entries*/
2932         for (i = 0; i < rx_bufs; i++) {
2933                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2934                 if (rc)
2935                         return rc;
2936         }
2937
2938         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2939         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0, rx_bufs,
2940                      NULL);
2941         if (rc) {
2942                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2943                 return rc;
2944         }
2945
2946         /* completion */
2947         rc = qeth_cq_init(card);
2948         if (rc) {
2949                 return rc;
2950         }
2951
2952         /* outbound queue */
2953         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2954                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2955
2956                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2957                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2958                 queue->next_buf_to_fill = 0;
2959                 queue->do_pack = 0;
2960                 queue->prev_hdr = NULL;
2961                 queue->coalesced_frames = 0;
2962                 queue->bulk_start = 0;
2963                 queue->bulk_count = 0;
2964                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
2965                 atomic_set(&queue->used_buffers, 0);
2966                 atomic_set(&queue->set_pci_flags_count, 0);
2967                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
2968         }
2969         return 0;
2970 }
2971
2972 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2973                                   struct qeth_cmd_buffer *iob)
2974 {
2975         qeth_mpc_finalize_cmd(card, iob);
2976
2977         /* override with IPA-specific values: */
2978         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
2979 }
2980
2981 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
2982                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
2983 {
2984         u8 prot_type = qeth_mpc_select_prot_type(card);
2985         u16 total_length = iob->length;
2986
2987         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2988                        iob->data);
2989         iob->finalize = qeth_ipa_finalize_cmd;
2990
2991         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2992         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2993         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2994         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2995         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2996         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2997                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2998         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2999 }
3000
3001 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3002                                  struct qeth_cmd_buffer *reply)
3003 {
3004         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3005
3006         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3007 }
3008
3009 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3010                                            enum qeth_ipa_cmds cmd_code,
3011                                            enum qeth_prot_versions prot,
3012                                            unsigned int data_length)
3013 {
3014         struct qeth_cmd_buffer *iob;
3015         struct qeth_ipacmd_hdr *hdr;
3016
3017         data_length += offsetof(struct qeth_ipa_cmd, data);
3018         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3019                              QETH_IPA_TIMEOUT);
3020         if (!iob)
3021                 return NULL;
3022
3023         qeth_prepare_ipa_cmd(card, iob, data_length);
3024         iob->match = qeth_ipa_match_reply;
3025
3026         hdr = &__ipa_cmd(iob)->hdr;
3027         hdr->command = cmd_code;
3028         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3029         /* hdr->seqno is set by qeth_send_control_data() */
3030         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3031         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3032         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3033         hdr->param_count = 1;
3034         hdr->prot_version = prot;
3035         return iob;
3036 }
3037 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3038
3039 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3040                                 struct qeth_reply *reply, unsigned long data)
3041 {
3042         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3043
3044         return (cmd->hdr.return_code) ? -EIO : 0;
3045 }
3046
3047 /**
3048  * qeth_send_ipa_cmd() - send an IPA command
3049  *
3050  * See qeth_send_control_data() for explanation of the arguments.
3051  */
3052
3053 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3054                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3055                         unsigned long),
3056                 void *reply_param)
3057 {
3058         int rc;
3059
3060         QETH_CARD_TEXT(card, 4, "sendipa");
3061
3062         if (card->read_or_write_problem) {
3063                 qeth_put_cmd(iob);
3064                 return -EIO;
3065         }
3066
3067         if (reply_cb == NULL)
3068                 reply_cb = qeth_send_ipa_cmd_cb;
3069         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3070         if (rc == -ETIME) {
3071                 qeth_clear_ipacmd_list(card);
3072                 qeth_schedule_recovery(card);
3073         }
3074         return rc;
3075 }
3076 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3077
3078 static int qeth_send_startlan_cb(struct qeth_card *card,
3079                                  struct qeth_reply *reply, unsigned long data)
3080 {
3081         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3082
3083         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3084                 return -ENETDOWN;
3085
3086         return (cmd->hdr.return_code) ? -EIO : 0;
3087 }
3088
3089 static int qeth_send_startlan(struct qeth_card *card)
3090 {
3091         struct qeth_cmd_buffer *iob;
3092
3093         QETH_CARD_TEXT(card, 2, "strtlan");
3094
3095         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3096         if (!iob)
3097                 return -ENOMEM;
3098         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3099 }
3100
3101 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3102 {
3103         if (!cmd->hdr.return_code)
3104                 cmd->hdr.return_code =
3105                         cmd->data.setadapterparms.hdr.return_code;
3106         return cmd->hdr.return_code;
3107 }
3108
3109 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3110                 struct qeth_reply *reply, unsigned long data)
3111 {
3112         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3113         struct qeth_query_cmds_supp *query_cmd;
3114
3115         QETH_CARD_TEXT(card, 3, "quyadpcb");
3116         if (qeth_setadpparms_inspect_rc(cmd))
3117                 return -EIO;
3118
3119         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3120         if (query_cmd->lan_type & 0x7f) {
3121                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3122                         return -EPROTONOSUPPORT;
3123
3124                 card->info.link_type = query_cmd->lan_type;
3125                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3126         }
3127
3128         card->options.adp.supported = query_cmd->supported_cmds;
3129         return 0;
3130 }
3131
3132 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3133                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3134                                                     unsigned int data_length)
3135 {
3136         struct qeth_ipacmd_setadpparms_hdr *hdr;
3137         struct qeth_cmd_buffer *iob;
3138
3139         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3140                                  data_length +
3141                                  offsetof(struct qeth_ipacmd_setadpparms,
3142                                           data));
3143         if (!iob)
3144                 return NULL;
3145
3146         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3147         hdr->cmdlength = sizeof(*hdr) + data_length;
3148         hdr->command_code = adp_cmd;
3149         hdr->used_total = 1;
3150         hdr->seq_no = 1;
3151         return iob;
3152 }
3153
3154 static int qeth_query_setadapterparms(struct qeth_card *card)
3155 {
3156         int rc;
3157         struct qeth_cmd_buffer *iob;
3158
3159         QETH_CARD_TEXT(card, 3, "queryadp");
3160         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3161                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3162         if (!iob)
3163                 return -ENOMEM;
3164         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3165         return rc;
3166 }
3167
3168 static int qeth_query_ipassists_cb(struct qeth_card *card,
3169                 struct qeth_reply *reply, unsigned long data)
3170 {
3171         struct qeth_ipa_cmd *cmd;
3172
3173         QETH_CARD_TEXT(card, 2, "qipasscb");
3174
3175         cmd = (struct qeth_ipa_cmd *) data;
3176
3177         switch (cmd->hdr.return_code) {
3178         case IPA_RC_SUCCESS:
3179                 break;
3180         case IPA_RC_NOTSUPP:
3181         case IPA_RC_L2_UNSUPPORTED_CMD:
3182                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3183                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3184                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3185                 return -EOPNOTSUPP;
3186         default:
3187                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3188                                  CARD_DEVID(card), cmd->hdr.return_code);
3189                 return -EIO;
3190         }
3191
3192         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3193                 card->options.ipa4 = cmd->hdr.assists;
3194         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3195                 card->options.ipa6 = cmd->hdr.assists;
3196         else
3197                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3198                                  CARD_DEVID(card));
3199         return 0;
3200 }
3201
3202 static int qeth_query_ipassists(struct qeth_card *card,
3203                                 enum qeth_prot_versions prot)
3204 {
3205         int rc;
3206         struct qeth_cmd_buffer *iob;
3207
3208         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3209         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3210         if (!iob)
3211                 return -ENOMEM;
3212         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3213         return rc;
3214 }
3215
3216 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3217                                 struct qeth_reply *reply, unsigned long data)
3218 {
3219         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3220         struct qeth_query_switch_attributes *attrs;
3221         struct qeth_switch_info *sw_info;
3222
3223         QETH_CARD_TEXT(card, 2, "qswiatcb");
3224         if (qeth_setadpparms_inspect_rc(cmd))
3225                 return -EIO;
3226
3227         sw_info = (struct qeth_switch_info *)reply->param;
3228         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3229         sw_info->capabilities = attrs->capabilities;
3230         sw_info->settings = attrs->settings;
3231         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3232                         sw_info->settings);
3233         return 0;
3234 }
3235
3236 int qeth_query_switch_attributes(struct qeth_card *card,
3237                                  struct qeth_switch_info *sw_info)
3238 {
3239         struct qeth_cmd_buffer *iob;
3240
3241         QETH_CARD_TEXT(card, 2, "qswiattr");
3242         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3243                 return -EOPNOTSUPP;
3244         if (!netif_carrier_ok(card->dev))
3245                 return -ENOMEDIUM;
3246         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3247         if (!iob)
3248                 return -ENOMEM;
3249         return qeth_send_ipa_cmd(card, iob,
3250                                 qeth_query_switch_attributes_cb, sw_info);
3251 }
3252
3253 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3254                                           enum qeth_diags_cmds sub_cmd,
3255                                           unsigned int data_length)
3256 {
3257         struct qeth_ipacmd_diagass *cmd;
3258         struct qeth_cmd_buffer *iob;
3259
3260         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3261                                  DIAG_HDR_LEN + data_length);
3262         if (!iob)
3263                 return NULL;
3264
3265         cmd = &__ipa_cmd(iob)->data.diagass;
3266         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3267         cmd->subcmd = sub_cmd;
3268         return iob;
3269 }
3270 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3271
3272 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3273                 struct qeth_reply *reply, unsigned long data)
3274 {
3275         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3276         u16 rc = cmd->hdr.return_code;
3277
3278         if (rc) {
3279                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3280                 return -EIO;
3281         }
3282
3283         card->info.diagass_support = cmd->data.diagass.ext;
3284         return 0;
3285 }
3286
3287 static int qeth_query_setdiagass(struct qeth_card *card)
3288 {
3289         struct qeth_cmd_buffer *iob;
3290
3291         QETH_CARD_TEXT(card, 2, "qdiagass");
3292         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3293         if (!iob)
3294                 return -ENOMEM;
3295         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3296 }
3297
3298 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3299 {
3300         unsigned long info = get_zeroed_page(GFP_KERNEL);
3301         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3302         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3303         struct ccw_dev_id ccwid;
3304         int level;
3305
3306         tid->chpid = card->info.chpid;
3307         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3308         tid->ssid = ccwid.ssid;
3309         tid->devno = ccwid.devno;
3310         if (!info)
3311                 return;
3312         level = stsi(NULL, 0, 0, 0);
3313         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3314                 tid->lparnr = info222->lpar_number;
3315         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3316                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3317                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3318         }
3319         free_page(info);
3320 }
3321
3322 static int qeth_hw_trap_cb(struct qeth_card *card,
3323                 struct qeth_reply *reply, unsigned long data)
3324 {
3325         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3326         u16 rc = cmd->hdr.return_code;
3327
3328         if (rc) {
3329                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3330                 return -EIO;
3331         }
3332         return 0;
3333 }
3334
3335 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3336 {
3337         struct qeth_cmd_buffer *iob;
3338         struct qeth_ipa_cmd *cmd;
3339
3340         QETH_CARD_TEXT(card, 2, "diagtrap");
3341         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3342         if (!iob)
3343                 return -ENOMEM;
3344         cmd = __ipa_cmd(iob);
3345         cmd->data.diagass.type = 1;
3346         cmd->data.diagass.action = action;
3347         switch (action) {
3348         case QETH_DIAGS_TRAP_ARM:
3349                 cmd->data.diagass.options = 0x0003;
3350                 cmd->data.diagass.ext = 0x00010000 +
3351                         sizeof(struct qeth_trap_id);
3352                 qeth_get_trap_id(card,
3353                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3354                 break;
3355         case QETH_DIAGS_TRAP_DISARM:
3356                 cmd->data.diagass.options = 0x0001;
3357                 break;
3358         case QETH_DIAGS_TRAP_CAPTURE:
3359                 break;
3360         }
3361         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3362 }
3363
3364 static int qeth_check_qdio_errors(struct qeth_card *card,
3365                                   struct qdio_buffer *buf,
3366                                   unsigned int qdio_error,
3367                                   const char *dbftext)
3368 {
3369         if (qdio_error) {
3370                 QETH_CARD_TEXT(card, 2, dbftext);
3371                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3372                                buf->element[15].sflags);
3373                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3374                                buf->element[14].sflags);
3375                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3376                 if ((buf->element[15].sflags) == 0x12) {
3377                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3378                         return 0;
3379                 } else
3380                         return 1;
3381         }
3382         return 0;
3383 }
3384
3385 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3386                                          unsigned int count)
3387 {
3388         struct qeth_qdio_q *queue = card->qdio.in_q;
3389         struct list_head *lh;
3390         int i;
3391         int rc;
3392         int newcount = 0;
3393
3394         /* only requeue at a certain threshold to avoid SIGAs */
3395         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3396                 for (i = queue->next_buf_to_init;
3397                      i < queue->next_buf_to_init + count; ++i) {
3398                         if (qeth_init_input_buffer(card,
3399                                 &queue->bufs[QDIO_BUFNR(i)])) {
3400                                 break;
3401                         } else {
3402                                 newcount++;
3403                         }
3404                 }
3405
3406                 if (newcount < count) {
3407                         /* we are in memory shortage so we switch back to
3408                            traditional skb allocation and drop packages */
3409                         atomic_set(&card->force_alloc_skb, 3);
3410                         count = newcount;
3411                 } else {
3412                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3413                 }
3414
3415                 if (!count) {
3416                         i = 0;
3417                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3418                                 i++;
3419                         if (i == card->qdio.in_buf_pool.buf_count) {
3420                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3421                                 schedule_delayed_work(
3422                                         &card->buffer_reclaim_work,
3423                                         QETH_RECLAIM_WORK_TIME);
3424                         }
3425                         return 0;
3426                 }
3427
3428                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3429                              queue->next_buf_to_init, count, NULL);
3430                 if (rc) {
3431                         QETH_CARD_TEXT(card, 2, "qinberr");
3432                 }
3433                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3434                                                      count);
3435                 return count;
3436         }
3437
3438         return 0;
3439 }
3440
3441 static void qeth_buffer_reclaim_work(struct work_struct *work)
3442 {
3443         struct qeth_card *card = container_of(to_delayed_work(work),
3444                                               struct qeth_card,
3445                                               buffer_reclaim_work);
3446
3447         local_bh_disable();
3448         napi_schedule(&card->napi);
3449         /* kick-start the NAPI softirq: */
3450         local_bh_enable();
3451 }
3452
3453 static void qeth_handle_send_error(struct qeth_card *card,
3454                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3455 {
3456         int sbalf15 = buffer->buffer->element[15].sflags;
3457
3458         QETH_CARD_TEXT(card, 6, "hdsnderr");
3459         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3460
3461         if (!qdio_err)
3462                 return;
3463
3464         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3465                 return;
3466
3467         QETH_CARD_TEXT(card, 1, "lnkfail");
3468         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3469                        (u16)qdio_err, (u8)sbalf15);
3470 }
3471
3472 /**
3473  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3474  * @queue: queue to check for packing buffer
3475  *
3476  * Returns number of buffers that were prepared for flush.
3477  */
3478 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3479 {
3480         struct qeth_qdio_out_buffer *buffer;
3481
3482         buffer = queue->bufs[queue->next_buf_to_fill];
3483         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3484             (buffer->next_element_to_fill > 0)) {
3485                 /* it's a packing buffer */
3486                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3487                 queue->next_buf_to_fill =
3488                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3489                 return 1;
3490         }
3491         return 0;
3492 }
3493
3494 /*
3495  * Switched to packing state if the number of used buffers on a queue
3496  * reaches a certain limit.
3497  */
3498 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3499 {
3500         if (!queue->do_pack) {
3501                 if (atomic_read(&queue->used_buffers)
3502                     >= QETH_HIGH_WATERMARK_PACK){
3503                         /* switch non-PACKING -> PACKING */
3504                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3505                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3506                         queue->do_pack = 1;
3507                 }
3508         }
3509 }
3510
3511 /*
3512  * Switches from packing to non-packing mode. If there is a packing
3513  * buffer on the queue this buffer will be prepared to be flushed.
3514  * In that case 1 is returned to inform the caller. If no buffer
3515  * has to be flushed, zero is returned.
3516  */
3517 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3518 {
3519         if (queue->do_pack) {
3520                 if (atomic_read(&queue->used_buffers)
3521                     <= QETH_LOW_WATERMARK_PACK) {
3522                         /* switch PACKING -> non-PACKING */
3523                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3524                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3525                         queue->do_pack = 0;
3526                         return qeth_prep_flush_pack_buffer(queue);
3527                 }
3528         }
3529         return 0;
3530 }
3531
3532 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3533                                int count)
3534 {
3535         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3536         struct qeth_card *card = queue->card;
3537         unsigned int frames, usecs;
3538         struct qaob *aob = NULL;
3539         int rc;
3540         int i;
3541
3542         for (i = index; i < index + count; ++i) {
3543                 unsigned int bidx = QDIO_BUFNR(i);
3544                 struct sk_buff *skb;
3545
3546                 buf = queue->bufs[bidx];
3547                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3548                                 SBAL_EFLAGS_LAST_ENTRY;
3549                 queue->coalesced_frames += buf->frames;
3550
3551                 if (IS_IQD(card)) {
3552                         skb_queue_walk(&buf->skb_list, skb)
3553                                 skb_tx_timestamp(skb);
3554                 }
3555         }
3556
3557         if (IS_IQD(card)) {
3558                 if (card->options.cq == QETH_CQ_ENABLED &&
3559                     !qeth_iqd_is_mcast_queue(card, queue) &&
3560                     count == 1) {
3561                         if (!buf->aob)
3562                                 buf->aob = qdio_allocate_aob();
3563                         if (buf->aob) {
3564                                 struct qeth_qaob_priv1 *priv;
3565
3566                                 aob = buf->aob;
3567                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3568                                 priv->state = QETH_QAOB_ISSUED;
3569                                 priv->queue_no = queue->queue_no;
3570                         }
3571                 }
3572         } else {
3573                 if (!queue->do_pack) {
3574                         if ((atomic_read(&queue->used_buffers) >=
3575                                 (QETH_HIGH_WATERMARK_PACK -
3576                                  QETH_WATERMARK_PACK_FUZZ)) &&
3577                             !atomic_read(&queue->set_pci_flags_count)) {
3578                                 /* it's likely that we'll go to packing
3579                                  * mode soon */
3580                                 atomic_inc(&queue->set_pci_flags_count);
3581                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3582                         }
3583                 } else {
3584                         if (!atomic_read(&queue->set_pci_flags_count)) {
3585                                 /*
3586                                  * there's no outstanding PCI any more, so we
3587                                  * have to request a PCI to be sure the the PCI
3588                                  * will wake at some time in the future then we
3589                                  * can flush packed buffers that might still be
3590                                  * hanging around, which can happen if no
3591                                  * further send was requested by the stack
3592                                  */
3593                                 atomic_inc(&queue->set_pci_flags_count);
3594                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3595                         }
3596                 }
3597         }
3598
3599         QETH_TXQ_STAT_INC(queue, doorbell);
3600         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_OUTPUT, queue->queue_no,
3601                      index, count, aob);
3602
3603         switch (rc) {
3604         case 0:
3605         case -ENOBUFS:
3606                 /* ignore temporary SIGA errors without busy condition */
3607
3608                 /* Fake the TX completion interrupt: */
3609                 frames = READ_ONCE(queue->max_coalesced_frames);
3610                 usecs = READ_ONCE(queue->coalesce_usecs);
3611
3612                 if (frames && queue->coalesced_frames >= frames) {
3613                         napi_schedule(&queue->napi);
3614                         queue->coalesced_frames = 0;
3615                         QETH_TXQ_STAT_INC(queue, coal_frames);
3616                 } else if (qeth_use_tx_irqs(card) &&
3617                            atomic_read(&queue->used_buffers) >= 32) {
3618                         /* Old behaviour carried over from the qdio layer: */
3619                         napi_schedule(&queue->napi);
3620                         QETH_TXQ_STAT_INC(queue, coal_frames);
3621                 } else if (usecs) {
3622                         qeth_tx_arm_timer(queue, usecs);
3623                 }
3624
3625                 break;
3626         default:
3627                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3628                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3629                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3630                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3631                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3632
3633                 /* this must not happen under normal circumstances. if it
3634                  * happens something is really wrong -> recover */
3635                 qeth_schedule_recovery(queue->card);
3636         }
3637 }
3638
3639 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3640 {
3641         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3642
3643         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3644         queue->prev_hdr = NULL;
3645         queue->bulk_count = 0;
3646 }
3647
3648 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3649 {
3650         /*
3651          * check if weed have to switch to non-packing mode or if
3652          * we have to get a pci flag out on the queue
3653          */
3654         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3655             !atomic_read(&queue->set_pci_flags_count)) {
3656                 unsigned int index, flush_cnt;
3657                 bool q_was_packing;
3658
3659                 spin_lock(&queue->lock);
3660
3661                 index = queue->next_buf_to_fill;
3662                 q_was_packing = queue->do_pack;
3663
3664                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3665                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3666                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3667
3668                 if (flush_cnt) {
3669                         qeth_flush_buffers(queue, index, flush_cnt);
3670                         if (q_was_packing)
3671                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3672                 }
3673
3674                 spin_unlock(&queue->lock);
3675         }
3676 }
3677
3678 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3679 {
3680         struct qeth_card *card = (struct qeth_card *)card_ptr;
3681
3682         napi_schedule_irqoff(&card->napi);
3683 }
3684
3685 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3686 {
3687         int rc;
3688
3689         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3690                 rc = -1;
3691                 goto out;
3692         } else {
3693                 if (card->options.cq == cq) {
3694                         rc = 0;
3695                         goto out;
3696                 }
3697
3698                 qeth_free_qdio_queues(card);
3699                 card->options.cq = cq;
3700                 rc = 0;
3701         }
3702 out:
3703         return rc;
3704
3705 }
3706 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3707
3708 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3709 {
3710         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3711         unsigned int queue_no = priv->queue_no;
3712
3713         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3714
3715         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3716             queue_no < card->qdio.no_out_queues)
3717                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3718 }
3719
3720 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3721                                  unsigned int queue, int first_element,
3722                                  int count)
3723 {
3724         struct qeth_qdio_q *cq = card->qdio.c_q;
3725         int i;
3726         int rc;
3727
3728         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3729         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3730         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3731
3732         if (qdio_err) {
3733                 netif_tx_stop_all_queues(card->dev);
3734                 qeth_schedule_recovery(card);
3735                 return;
3736         }
3737
3738         for (i = first_element; i < first_element + count; ++i) {
3739                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3740                 int e = 0;
3741
3742                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3743                        buffer->element[e].addr) {
3744                         unsigned long phys_aob_addr = buffer->element[e].addr;
3745
3746                         qeth_qdio_handle_aob(card, phys_to_virt(phys_aob_addr));
3747                         ++e;
3748                 }
3749                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3750         }
3751         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3752                      cq->next_buf_to_init, count, NULL);
3753         if (rc) {
3754                 dev_warn(&card->gdev->dev,
3755                         "QDIO reported an error, rc=%i\n", rc);
3756                 QETH_CARD_TEXT(card, 2, "qcqherr");
3757         }
3758
3759         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3760 }
3761
3762 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3763                                     unsigned int qdio_err, int queue,
3764                                     int first_elem, int count,
3765                                     unsigned long card_ptr)
3766 {
3767         struct qeth_card *card = (struct qeth_card *)card_ptr;
3768
3769         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3770         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3771
3772         if (qdio_err)
3773                 qeth_schedule_recovery(card);
3774 }
3775
3776 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3777                                      unsigned int qdio_error, int __queue,
3778                                      int first_element, int count,
3779                                      unsigned long card_ptr)
3780 {
3781         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3782
3783         QETH_CARD_TEXT(card, 2, "achkcond");
3784         netif_tx_stop_all_queues(card->dev);
3785         qeth_schedule_recovery(card);
3786 }
3787
3788 /**
3789  * Note: Function assumes that we have 4 outbound queues.
3790  */
3791 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3792 {
3793         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3794         u8 tos;
3795
3796         switch (card->qdio.do_prio_queueing) {
3797         case QETH_PRIO_Q_ING_TOS:
3798         case QETH_PRIO_Q_ING_PREC:
3799                 switch (vlan_get_protocol(skb)) {
3800                 case htons(ETH_P_IP):
3801                         tos = ipv4_get_dsfield(ip_hdr(skb));
3802                         break;
3803                 case htons(ETH_P_IPV6):
3804                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3805                         break;
3806                 default:
3807                         return card->qdio.default_out_queue;
3808                 }
3809                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3810                         return ~tos >> 6 & 3;
3811                 if (tos & IPTOS_MINCOST)
3812                         return 3;
3813                 if (tos & IPTOS_RELIABILITY)
3814                         return 2;
3815                 if (tos & IPTOS_THROUGHPUT)
3816                         return 1;
3817                 if (tos & IPTOS_LOWDELAY)
3818                         return 0;
3819                 break;
3820         case QETH_PRIO_Q_ING_SKB:
3821                 if (skb->priority > 5)
3822                         return 0;
3823                 return ~skb->priority >> 1 & 3;
3824         case QETH_PRIO_Q_ING_VLAN:
3825                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3826                         return ~ntohs(veth->h_vlan_TCI) >>
3827                                (VLAN_PRIO_SHIFT + 1) & 3;
3828                 break;
3829         case QETH_PRIO_Q_ING_FIXED:
3830                 return card->qdio.default_out_queue;
3831         default:
3832                 break;
3833         }
3834         return card->qdio.default_out_queue;
3835 }
3836 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3837
3838 /**
3839  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3840  * @skb:                                SKB address
3841  *
3842  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3843  * fragmented part of the SKB. Returns zero for linear SKB.
3844  */
3845 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3846 {
3847         int cnt, elements = 0;
3848
3849         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3850                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3851
3852                 elements += qeth_get_elements_for_range(
3853                         (addr_t)skb_frag_address(frag),
3854                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3855         }
3856         return elements;
3857 }
3858
3859 /**
3860  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3861  *                              to transmit an skb.
3862  * @skb:                        the skb to operate on.
3863  * @data_offset:                skip this part of the skb's linear data
3864  *
3865  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3866  * skb's data (both its linear part and paged fragments).
3867  */
3868 static unsigned int qeth_count_elements(struct sk_buff *skb,
3869                                         unsigned int data_offset)
3870 {
3871         unsigned int elements = qeth_get_elements_for_frags(skb);
3872         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3873         addr_t start = (addr_t)skb->data + data_offset;
3874
3875         if (start != end)
3876                 elements += qeth_get_elements_for_range(start, end);
3877         return elements;
3878 }
3879
3880 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3881                                          MAX_TCP_HEADER)
3882
3883 /**
3884  * qeth_add_hw_header() - add a HW header to an skb.
3885  * @skb: skb that the HW header should be added to.
3886  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3887  *       it contains a valid pointer to a qeth_hdr.
3888  * @hdr_len: length of the HW header.
3889  * @proto_len: length of protocol headers that need to be in same page as the
3890  *             HW header.
3891  *
3892  * Returns the pushed length. If the header can't be pushed on
3893  * (eg. because it would cross a page boundary), it is allocated from
3894  * the cache instead and 0 is returned.
3895  * The number of needed buffer elements is returned in @elements.
3896  * Error to create the hdr is indicated by returning with < 0.
3897  */
3898 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3899                               struct sk_buff *skb, struct qeth_hdr **hdr,
3900                               unsigned int hdr_len, unsigned int proto_len,
3901                               unsigned int *elements)
3902 {
3903         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3904         const unsigned int contiguous = proto_len ? proto_len : 1;
3905         const unsigned int max_elements = queue->max_elements;
3906         unsigned int __elements;
3907         addr_t start, end;
3908         bool push_ok;
3909         int rc;
3910
3911 check_layout:
3912         start = (addr_t)skb->data - hdr_len;
3913         end = (addr_t)skb->data;
3914
3915         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3916                 /* Push HW header into same page as first protocol header. */
3917                 push_ok = true;
3918                 /* ... but TSO always needs a separate element for headers: */
3919                 if (skb_is_gso(skb))
3920                         __elements = 1 + qeth_count_elements(skb, proto_len);
3921                 else
3922                         __elements = qeth_count_elements(skb, 0);
3923         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3924                 /* Push HW header into preceding page, flush with skb->data. */
3925                 push_ok = true;
3926                 __elements = 1 + qeth_count_elements(skb, 0);
3927         } else {
3928                 /* Use header cache, copy protocol headers up. */
3929                 push_ok = false;
3930                 __elements = 1 + qeth_count_elements(skb, proto_len);
3931         }
3932
3933         /* Compress skb to fit into one IO buffer: */
3934         if (__elements > max_elements) {
3935                 if (!skb_is_nonlinear(skb)) {
3936                         /* Drop it, no easy way of shrinking it further. */
3937                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3938                                          max_elements, __elements, skb->len);
3939                         return -E2BIG;
3940                 }
3941
3942                 rc = skb_linearize(skb);
3943                 if (rc) {
3944                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3945                         return rc;
3946                 }
3947
3948                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3949                 /* Linearization changed the layout, re-evaluate: */
3950                 goto check_layout;
3951         }
3952
3953         *elements = __elements;
3954         /* Add the header: */
3955         if (push_ok) {
3956                 *hdr = skb_push(skb, hdr_len);
3957                 return hdr_len;
3958         }
3959
3960         /* Fall back to cache element with known-good alignment: */
3961         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3962                 return -E2BIG;
3963         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
3964         if (!*hdr)
3965                 return -ENOMEM;
3966         /* Copy protocol headers behind HW header: */
3967         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3968         return 0;
3969 }
3970
3971 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
3972                               struct sk_buff *curr_skb,
3973                               struct qeth_hdr *curr_hdr)
3974 {
3975         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
3976         struct qeth_hdr *prev_hdr = queue->prev_hdr;
3977
3978         if (!prev_hdr)
3979                 return true;
3980
3981         /* All packets must have the same target: */
3982         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
3983                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
3984
3985                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
3986                                         eth_hdr(curr_skb)->h_dest) &&
3987                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
3988         }
3989
3990         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
3991                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
3992 }
3993
3994 /**
3995  * qeth_fill_buffer() - map skb into an output buffer
3996  * @buf:        buffer to transport the skb
3997  * @skb:        skb to map into the buffer
3998  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3999  *              from qeth_core_header_cache.
4000  * @offset:     when mapping the skb, start at skb->data + offset
4001  * @hd_len:     if > 0, build a dedicated header element of this size
4002  */
4003 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4004                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4005                                      unsigned int offset, unsigned int hd_len)
4006 {
4007         struct qdio_buffer *buffer = buf->buffer;
4008         int element = buf->next_element_to_fill;
4009         int length = skb_headlen(skb) - offset;
4010         char *data = skb->data + offset;
4011         unsigned int elem_length, cnt;
4012         bool is_first_elem = true;
4013
4014         __skb_queue_tail(&buf->skb_list, skb);
4015
4016         /* build dedicated element for HW Header */
4017         if (hd_len) {
4018                 is_first_elem = false;
4019
4020                 buffer->element[element].addr = virt_to_phys(hdr);
4021                 buffer->element[element].length = hd_len;
4022                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4023
4024                 /* HW header is allocated from cache: */
4025                 if ((void *)hdr != skb->data)
4026                         __set_bit(element, buf->from_kmem_cache);
4027                 /* HW header was pushed and is contiguous with linear part: */
4028                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4029                          (data == (char *)hdr + hd_len))
4030                         buffer->element[element].eflags |=
4031                                 SBAL_EFLAGS_CONTIGUOUS;
4032
4033                 element++;
4034         }
4035
4036         /* map linear part into buffer element(s) */
4037         while (length > 0) {
4038                 elem_length = min_t(unsigned int, length,
4039                                     PAGE_SIZE - offset_in_page(data));
4040
4041                 buffer->element[element].addr = virt_to_phys(data);
4042                 buffer->element[element].length = elem_length;
4043                 length -= elem_length;
4044                 if (is_first_elem) {
4045                         is_first_elem = false;
4046                         if (length || skb_is_nonlinear(skb))
4047                                 /* skb needs additional elements */
4048                                 buffer->element[element].eflags =
4049                                         SBAL_EFLAGS_FIRST_FRAG;
4050                         else
4051                                 buffer->element[element].eflags = 0;
4052                 } else {
4053                         buffer->element[element].eflags =
4054                                 SBAL_EFLAGS_MIDDLE_FRAG;
4055                 }
4056
4057                 data += elem_length;
4058                 element++;
4059         }
4060
4061         /* map page frags into buffer element(s) */
4062         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4063                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4064
4065                 data = skb_frag_address(frag);
4066                 length = skb_frag_size(frag);
4067                 while (length > 0) {
4068                         elem_length = min_t(unsigned int, length,
4069                                             PAGE_SIZE - offset_in_page(data));
4070
4071                         buffer->element[element].addr = virt_to_phys(data);
4072                         buffer->element[element].length = elem_length;
4073                         buffer->element[element].eflags =
4074                                 SBAL_EFLAGS_MIDDLE_FRAG;
4075
4076                         length -= elem_length;
4077                         data += elem_length;
4078                         element++;
4079                 }
4080         }
4081
4082         if (buffer->element[element - 1].eflags)
4083                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4084         buf->next_element_to_fill = element;
4085         return element;
4086 }
4087
4088 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4089                        struct sk_buff *skb, unsigned int elements,
4090                        struct qeth_hdr *hdr, unsigned int offset,
4091                        unsigned int hd_len)
4092 {
4093         unsigned int bytes = qdisc_pkt_len(skb);
4094         struct qeth_qdio_out_buffer *buffer;
4095         unsigned int next_element;
4096         struct netdev_queue *txq;
4097         bool stopped = false;
4098         bool flush;
4099
4100         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4101         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4102
4103         /* Just a sanity check, the wake/stop logic should ensure that we always
4104          * get a free buffer.
4105          */
4106         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4107                 return -EBUSY;
4108
4109         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4110
4111         if (flush ||
4112             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4113                 if (buffer->next_element_to_fill > 0) {
4114                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4115                         queue->bulk_count++;
4116                 }
4117
4118                 if (queue->bulk_count >= queue->bulk_max)
4119                         flush = true;
4120
4121                 if (flush)
4122                         qeth_flush_queue(queue);
4123
4124                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4125                                                 queue->bulk_count)];
4126
4127                 /* Sanity-check again: */
4128                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4129                         return -EBUSY;
4130         }
4131
4132         if (buffer->next_element_to_fill == 0 &&
4133             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4134                 /* If a TX completion happens right _here_ and misses to wake
4135                  * the txq, then our re-check below will catch the race.
4136                  */
4137                 QETH_TXQ_STAT_INC(queue, stopped);
4138                 netif_tx_stop_queue(txq);
4139                 stopped = true;
4140         }
4141
4142         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4143         buffer->bytes += bytes;
4144         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4145         queue->prev_hdr = hdr;
4146
4147         flush = __netdev_tx_sent_queue(txq, bytes,
4148                                        !stopped && netdev_xmit_more());
4149
4150         if (flush || next_element >= queue->max_elements) {
4151                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4152                 queue->bulk_count++;
4153
4154                 if (queue->bulk_count >= queue->bulk_max)
4155                         flush = true;
4156
4157                 if (flush)
4158                         qeth_flush_queue(queue);
4159         }
4160
4161         if (stopped && !qeth_out_queue_is_full(queue))
4162                 netif_tx_start_queue(txq);
4163         return 0;
4164 }
4165
4166 static int qeth_do_send_packet(struct qeth_card *card,
4167                                struct qeth_qdio_out_q *queue,
4168                                struct sk_buff *skb, struct qeth_hdr *hdr,
4169                                unsigned int offset, unsigned int hd_len,
4170                                unsigned int elements_needed)
4171 {
4172         unsigned int start_index = queue->next_buf_to_fill;
4173         struct qeth_qdio_out_buffer *buffer;
4174         unsigned int next_element;
4175         struct netdev_queue *txq;
4176         bool stopped = false;
4177         int flush_count = 0;
4178         int do_pack = 0;
4179         int rc = 0;
4180
4181         buffer = queue->bufs[queue->next_buf_to_fill];
4182
4183         /* Just a sanity check, the wake/stop logic should ensure that we always
4184          * get a free buffer.
4185          */
4186         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4187                 return -EBUSY;
4188
4189         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4190
4191         /* check if we need to switch packing state of this queue */
4192         qeth_switch_to_packing_if_needed(queue);
4193         if (queue->do_pack) {
4194                 do_pack = 1;
4195                 /* does packet fit in current buffer? */
4196                 if (buffer->next_element_to_fill + elements_needed >
4197                     queue->max_elements) {
4198                         /* ... no -> set state PRIMED */
4199                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4200                         flush_count++;
4201                         queue->next_buf_to_fill =
4202                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4203                         buffer = queue->bufs[queue->next_buf_to_fill];
4204
4205                         /* We stepped forward, so sanity-check again: */
4206                         if (atomic_read(&buffer->state) !=
4207                             QETH_QDIO_BUF_EMPTY) {
4208                                 qeth_flush_buffers(queue, start_index,
4209                                                            flush_count);
4210                                 rc = -EBUSY;
4211                                 goto out;
4212                         }
4213                 }
4214         }
4215
4216         if (buffer->next_element_to_fill == 0 &&
4217             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4218                 /* If a TX completion happens right _here_ and misses to wake
4219                  * the txq, then our re-check below will catch the race.
4220                  */
4221                 QETH_TXQ_STAT_INC(queue, stopped);
4222                 netif_tx_stop_queue(txq);
4223                 stopped = true;
4224         }
4225
4226         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4227         buffer->bytes += qdisc_pkt_len(skb);
4228         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4229
4230         if (queue->do_pack)
4231                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4232         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4233                 flush_count++;
4234                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4235                 queue->next_buf_to_fill =
4236                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4237         }
4238
4239         if (flush_count)
4240                 qeth_flush_buffers(queue, start_index, flush_count);
4241
4242 out:
4243         if (do_pack)
4244                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4245
4246         if (stopped && !qeth_out_queue_is_full(queue))
4247                 netif_tx_start_queue(txq);
4248         return rc;
4249 }
4250
4251 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4252                               unsigned int payload_len, struct sk_buff *skb,
4253                               unsigned int proto_len)
4254 {
4255         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4256
4257         ext->hdr_tot_len = sizeof(*ext);
4258         ext->imb_hdr_no = 1;
4259         ext->hdr_type = 1;
4260         ext->hdr_version = 1;
4261         ext->hdr_len = 28;
4262         ext->payload_len = payload_len;
4263         ext->mss = skb_shinfo(skb)->gso_size;
4264         ext->dg_hdr_len = proto_len;
4265 }
4266
4267 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4268               struct qeth_qdio_out_q *queue, __be16 proto,
4269               void (*fill_header)(struct qeth_qdio_out_q *queue,
4270                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4271                                   __be16 proto, unsigned int data_len))
4272 {
4273         unsigned int proto_len, hw_hdr_len;
4274         unsigned int frame_len = skb->len;
4275         bool is_tso = skb_is_gso(skb);
4276         unsigned int data_offset = 0;
4277         struct qeth_hdr *hdr = NULL;
4278         unsigned int hd_len = 0;
4279         unsigned int elements;
4280         int push_len, rc;
4281
4282         if (is_tso) {
4283                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4284                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4285         } else {
4286                 hw_hdr_len = sizeof(struct qeth_hdr);
4287                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4288         }
4289
4290         rc = skb_cow_head(skb, hw_hdr_len);
4291         if (rc)
4292                 return rc;
4293
4294         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4295                                       &elements);
4296         if (push_len < 0)
4297                 return push_len;
4298         if (is_tso || !push_len) {
4299                 /* HW header needs its own buffer element. */
4300                 hd_len = hw_hdr_len + proto_len;
4301                 data_offset = push_len + proto_len;
4302         }
4303         memset(hdr, 0, hw_hdr_len);
4304         fill_header(queue, hdr, skb, proto, frame_len);
4305         if (is_tso)
4306                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4307                                   frame_len - proto_len, skb, proto_len);
4308
4309         if (IS_IQD(card)) {
4310                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4311                                  hd_len);
4312         } else {
4313                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4314                 skb_orphan(skb);
4315                 spin_lock(&queue->lock);
4316                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4317                                          hd_len, elements);
4318                 spin_unlock(&queue->lock);
4319         }
4320
4321         if (rc && !push_len)
4322                 kmem_cache_free(qeth_core_header_cache, hdr);
4323
4324         return rc;
4325 }
4326 EXPORT_SYMBOL_GPL(qeth_xmit);
4327
4328 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4329                 struct qeth_reply *reply, unsigned long data)
4330 {
4331         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4332         struct qeth_ipacmd_setadpparms *setparms;
4333
4334         QETH_CARD_TEXT(card, 4, "prmadpcb");
4335
4336         setparms = &(cmd->data.setadapterparms);
4337         if (qeth_setadpparms_inspect_rc(cmd)) {
4338                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4339                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4340         }
4341         card->info.promisc_mode = setparms->data.mode;
4342         return (cmd->hdr.return_code) ? -EIO : 0;
4343 }
4344
4345 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4346 {
4347         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4348                                                     SET_PROMISC_MODE_OFF;
4349         struct qeth_cmd_buffer *iob;
4350         struct qeth_ipa_cmd *cmd;
4351
4352         QETH_CARD_TEXT(card, 4, "setprom");
4353         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4354
4355         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4356                                    SETADP_DATA_SIZEOF(mode));
4357         if (!iob)
4358                 return;
4359         cmd = __ipa_cmd(iob);
4360         cmd->data.setadapterparms.data.mode = mode;
4361         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4362 }
4363 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4364
4365 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4366                 struct qeth_reply *reply, unsigned long data)
4367 {
4368         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4369         struct qeth_ipacmd_setadpparms *adp_cmd;
4370
4371         QETH_CARD_TEXT(card, 4, "chgmaccb");
4372         if (qeth_setadpparms_inspect_rc(cmd))
4373                 return -EIO;
4374
4375         adp_cmd = &cmd->data.setadapterparms;
4376         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4377                 return -EADDRNOTAVAIL;
4378
4379         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4380             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4381                 return -EADDRNOTAVAIL;
4382
4383         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4384         return 0;
4385 }
4386
4387 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4388 {
4389         int rc;
4390         struct qeth_cmd_buffer *iob;
4391         struct qeth_ipa_cmd *cmd;
4392
4393         QETH_CARD_TEXT(card, 4, "chgmac");
4394
4395         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4396                                    SETADP_DATA_SIZEOF(change_addr));
4397         if (!iob)
4398                 return -ENOMEM;
4399         cmd = __ipa_cmd(iob);
4400         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4401         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4402         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4403                         card->dev->dev_addr);
4404         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4405                                NULL);
4406         return rc;
4407 }
4408 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4409
4410 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4411                 struct qeth_reply *reply, unsigned long data)
4412 {
4413         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4414         struct qeth_set_access_ctrl *access_ctrl_req;
4415
4416         QETH_CARD_TEXT(card, 4, "setaccb");
4417
4418         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4419         QETH_CARD_TEXT_(card, 2, "rc=%d",
4420                         cmd->data.setadapterparms.hdr.return_code);
4421         if (cmd->data.setadapterparms.hdr.return_code !=
4422                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4423                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4424                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4425                                  cmd->data.setadapterparms.hdr.return_code);
4426         switch (qeth_setadpparms_inspect_rc(cmd)) {
4427         case SET_ACCESS_CTRL_RC_SUCCESS:
4428                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4429                         dev_info(&card->gdev->dev,
4430                             "QDIO data connection isolation is deactivated\n");
4431                 else
4432                         dev_info(&card->gdev->dev,
4433                             "QDIO data connection isolation is activated\n");
4434                 return 0;
4435         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4436                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4437                                  CARD_DEVID(card));
4438                 return 0;
4439         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4440                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4441                                  CARD_DEVID(card));
4442                 return 0;
4443         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4444                 dev_err(&card->gdev->dev, "Adapter does not "
4445                         "support QDIO data connection isolation\n");
4446                 return -EOPNOTSUPP;
4447         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4448                 dev_err(&card->gdev->dev,
4449                         "Adapter is dedicated. "
4450                         "QDIO data connection isolation not supported\n");
4451                 return -EOPNOTSUPP;
4452         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4453                 dev_err(&card->gdev->dev,
4454                         "TSO does not permit QDIO data connection isolation\n");
4455                 return -EPERM;
4456         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4457                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4458                         "support reflective relay mode\n");
4459                 return -EOPNOTSUPP;
4460         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4461                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4462                                         "enabled at the adjacent switch port");
4463                 return -EREMOTEIO;
4464         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4465                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4466                                         "at the adjacent switch failed\n");
4467                 /* benign error while disabling ISOLATION_MODE_FWD */
4468                 return 0;
4469         default:
4470                 return -EIO;
4471         }
4472 }
4473
4474 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4475                                      enum qeth_ipa_isolation_modes mode)
4476 {
4477         int rc;
4478         struct qeth_cmd_buffer *iob;
4479         struct qeth_ipa_cmd *cmd;
4480         struct qeth_set_access_ctrl *access_ctrl_req;
4481
4482         QETH_CARD_TEXT(card, 4, "setacctl");
4483
4484         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4485                 dev_err(&card->gdev->dev,
4486                         "Adapter does not support QDIO data connection isolation\n");
4487                 return -EOPNOTSUPP;
4488         }
4489
4490         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4491                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4492         if (!iob)
4493                 return -ENOMEM;
4494         cmd = __ipa_cmd(iob);
4495         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4496         access_ctrl_req->subcmd_code = mode;
4497
4498         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4499                                NULL);
4500         if (rc) {
4501                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4502                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4503                                  rc, CARD_DEVID(card));
4504         }
4505
4506         return rc;
4507 }
4508
4509 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4510 {
4511         struct qeth_card *card;
4512
4513         card = dev->ml_priv;
4514         QETH_CARD_TEXT(card, 4, "txtimeo");
4515         qeth_schedule_recovery(card);
4516 }
4517 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4518
4519 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4520 {
4521         struct qeth_card *card = dev->ml_priv;
4522         int rc = 0;
4523
4524         switch (regnum) {
4525         case MII_BMCR: /* Basic mode control register */
4526                 rc = BMCR_FULLDPLX;
4527                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4528                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4529                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4530                         rc |= BMCR_SPEED100;
4531                 break;
4532         case MII_BMSR: /* Basic mode status register */
4533                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4534                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4535                      BMSR_100BASE4;
4536                 break;
4537         case MII_PHYSID1: /* PHYS ID 1 */
4538                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4539                      dev->dev_addr[2];
4540                 rc = (rc >> 5) & 0xFFFF;
4541                 break;
4542         case MII_PHYSID2: /* PHYS ID 2 */
4543                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4544                 break;
4545         case MII_ADVERTISE: /* Advertisement control reg */
4546                 rc = ADVERTISE_ALL;
4547                 break;
4548         case MII_LPA: /* Link partner ability reg */
4549                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4550                      LPA_100BASE4 | LPA_LPACK;
4551                 break;
4552         case MII_EXPANSION: /* Expansion register */
4553                 break;
4554         case MII_DCOUNTER: /* disconnect counter */
4555                 break;
4556         case MII_FCSCOUNTER: /* false carrier counter */
4557                 break;
4558         case MII_NWAYTEST: /* N-way auto-neg test register */
4559                 break;
4560         case MII_RERRCOUNTER: /* rx error counter */
4561                 rc = card->stats.rx_length_errors +
4562                      card->stats.rx_frame_errors +
4563                      card->stats.rx_fifo_errors;
4564                 break;
4565         case MII_SREVISION: /* silicon revision */
4566                 break;
4567         case MII_RESV1: /* reserved 1 */
4568                 break;
4569         case MII_LBRERROR: /* loopback, rx, bypass error */
4570                 break;
4571         case MII_PHYADDR: /* physical address */
4572                 break;
4573         case MII_RESV2: /* reserved 2 */
4574                 break;
4575         case MII_TPISTATUS: /* TPI status for 10mbps */
4576                 break;
4577         case MII_NCONFIG: /* network interface config */
4578                 break;
4579         default:
4580                 break;
4581         }
4582         return rc;
4583 }
4584
4585 static int qeth_snmp_command_cb(struct qeth_card *card,
4586                                 struct qeth_reply *reply, unsigned long data)
4587 {
4588         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4589         struct qeth_arp_query_info *qinfo = reply->param;
4590         struct qeth_ipacmd_setadpparms *adp_cmd;
4591         unsigned int data_len;
4592         void *snmp_data;
4593
4594         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4595
4596         if (cmd->hdr.return_code) {
4597                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4598                 return -EIO;
4599         }
4600         if (cmd->data.setadapterparms.hdr.return_code) {
4601                 cmd->hdr.return_code =
4602                         cmd->data.setadapterparms.hdr.return_code;
4603                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4604                 return -EIO;
4605         }
4606
4607         adp_cmd = &cmd->data.setadapterparms;
4608         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4609         if (adp_cmd->hdr.seq_no == 1) {
4610                 snmp_data = &adp_cmd->data.snmp;
4611         } else {
4612                 snmp_data = &adp_cmd->data.snmp.request;
4613                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4614         }
4615
4616         /* check if there is enough room in userspace */
4617         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4618                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4619                 return -ENOSPC;
4620         }
4621         QETH_CARD_TEXT_(card, 4, "snore%i",
4622                         cmd->data.setadapterparms.hdr.used_total);
4623         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4624                         cmd->data.setadapterparms.hdr.seq_no);
4625         /*copy entries to user buffer*/
4626         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4627         qinfo->udata_offset += data_len;
4628
4629         if (cmd->data.setadapterparms.hdr.seq_no <
4630             cmd->data.setadapterparms.hdr.used_total)
4631                 return 1;
4632         return 0;
4633 }
4634
4635 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4636 {
4637         struct qeth_snmp_ureq __user *ureq;
4638         struct qeth_cmd_buffer *iob;
4639         unsigned int req_len;
4640         struct qeth_arp_query_info qinfo = {0, };
4641         int rc = 0;
4642
4643         QETH_CARD_TEXT(card, 3, "snmpcmd");
4644
4645         if (IS_VM_NIC(card))
4646                 return -EOPNOTSUPP;
4647
4648         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4649             IS_LAYER3(card))
4650                 return -EOPNOTSUPP;
4651
4652         ureq = (struct qeth_snmp_ureq __user *) udata;
4653         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4654             get_user(req_len, &ureq->hdr.req_len))
4655                 return -EFAULT;
4656
4657         /* Sanitize user input, to avoid overflows in iob size calculation: */
4658         if (req_len > QETH_BUFSIZE)
4659                 return -EINVAL;
4660
4661         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4662         if (!iob)
4663                 return -ENOMEM;
4664
4665         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4666                            &ureq->cmd, req_len)) {
4667                 qeth_put_cmd(iob);
4668                 return -EFAULT;
4669         }
4670
4671         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4672         if (!qinfo.udata) {
4673                 qeth_put_cmd(iob);
4674                 return -ENOMEM;
4675         }
4676         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4677
4678         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4679         if (rc)
4680                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4681                                  CARD_DEVID(card), rc);
4682         else {
4683                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4684                         rc = -EFAULT;
4685         }
4686
4687         kfree(qinfo.udata);
4688         return rc;
4689 }
4690
4691 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4692                                          struct qeth_reply *reply,
4693                                          unsigned long data)
4694 {
4695         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4696         struct qeth_qoat_priv *priv = reply->param;
4697         int resdatalen;
4698
4699         QETH_CARD_TEXT(card, 3, "qoatcb");
4700         if (qeth_setadpparms_inspect_rc(cmd))
4701                 return -EIO;
4702
4703         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4704
4705         if (resdatalen > (priv->buffer_len - priv->response_len))
4706                 return -ENOSPC;
4707
4708         memcpy(priv->buffer + priv->response_len,
4709                &cmd->data.setadapterparms.hdr, resdatalen);
4710         priv->response_len += resdatalen;
4711
4712         if (cmd->data.setadapterparms.hdr.seq_no <
4713             cmd->data.setadapterparms.hdr.used_total)
4714                 return 1;
4715         return 0;
4716 }
4717
4718 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4719 {
4720         int rc = 0;
4721         struct qeth_cmd_buffer *iob;
4722         struct qeth_ipa_cmd *cmd;
4723         struct qeth_query_oat *oat_req;
4724         struct qeth_query_oat_data oat_data;
4725         struct qeth_qoat_priv priv;
4726         void __user *tmp;
4727
4728         QETH_CARD_TEXT(card, 3, "qoatcmd");
4729
4730         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4731                 return -EOPNOTSUPP;
4732
4733         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4734                 return -EFAULT;
4735
4736         priv.buffer_len = oat_data.buffer_len;
4737         priv.response_len = 0;
4738         priv.buffer = vzalloc(oat_data.buffer_len);
4739         if (!priv.buffer)
4740                 return -ENOMEM;
4741
4742         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4743                                    SETADP_DATA_SIZEOF(query_oat));
4744         if (!iob) {
4745                 rc = -ENOMEM;
4746                 goto out_free;
4747         }
4748         cmd = __ipa_cmd(iob);
4749         oat_req = &cmd->data.setadapterparms.data.query_oat;
4750         oat_req->subcmd_code = oat_data.command;
4751
4752         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4753         if (!rc) {
4754                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4755                                          u64_to_user_ptr(oat_data.ptr);
4756                 oat_data.response_len = priv.response_len;
4757
4758                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4759                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4760                         rc = -EFAULT;
4761         }
4762
4763 out_free:
4764         vfree(priv.buffer);
4765         return rc;
4766 }
4767
4768 static int qeth_query_card_info_cb(struct qeth_card *card,
4769                                    struct qeth_reply *reply, unsigned long data)
4770 {
4771         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4772         struct qeth_link_info *link_info = reply->param;
4773         struct qeth_query_card_info *card_info;
4774
4775         QETH_CARD_TEXT(card, 2, "qcrdincb");
4776         if (qeth_setadpparms_inspect_rc(cmd))
4777                 return -EIO;
4778
4779         card_info = &cmd->data.setadapterparms.data.card_info;
4780         netdev_dbg(card->dev,
4781                    "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
4782                    card_info->card_type, card_info->port_mode,
4783                    card_info->port_speed);
4784
4785         switch (card_info->port_mode) {
4786         case CARD_INFO_PORTM_FULLDUPLEX:
4787                 link_info->duplex = DUPLEX_FULL;
4788                 break;
4789         case CARD_INFO_PORTM_HALFDUPLEX:
4790                 link_info->duplex = DUPLEX_HALF;
4791                 break;
4792         default:
4793                 link_info->duplex = DUPLEX_UNKNOWN;
4794         }
4795
4796         switch (card_info->card_type) {
4797         case CARD_INFO_TYPE_1G_COPPER_A:
4798         case CARD_INFO_TYPE_1G_COPPER_B:
4799                 link_info->speed = SPEED_1000;
4800                 link_info->port = PORT_TP;
4801                 break;
4802         case CARD_INFO_TYPE_1G_FIBRE_A:
4803         case CARD_INFO_TYPE_1G_FIBRE_B:
4804                 link_info->speed = SPEED_1000;
4805                 link_info->port = PORT_FIBRE;
4806                 break;
4807         case CARD_INFO_TYPE_10G_FIBRE_A:
4808         case CARD_INFO_TYPE_10G_FIBRE_B:
4809                 link_info->speed = SPEED_10000;
4810                 link_info->port = PORT_FIBRE;
4811                 break;
4812         default:
4813                 switch (card_info->port_speed) {
4814                 case CARD_INFO_PORTS_10M:
4815                         link_info->speed = SPEED_10;
4816                         break;
4817                 case CARD_INFO_PORTS_100M:
4818                         link_info->speed = SPEED_100;
4819                         break;
4820                 case CARD_INFO_PORTS_1G:
4821                         link_info->speed = SPEED_1000;
4822                         break;
4823                 case CARD_INFO_PORTS_10G:
4824                         link_info->speed = SPEED_10000;
4825                         break;
4826                 case CARD_INFO_PORTS_25G:
4827                         link_info->speed = SPEED_25000;
4828                         break;
4829                 default:
4830                         link_info->speed = SPEED_UNKNOWN;
4831                 }
4832
4833                 link_info->port = PORT_OTHER;
4834         }
4835
4836         return 0;
4837 }
4838
4839 int qeth_query_card_info(struct qeth_card *card,
4840                          struct qeth_link_info *link_info)
4841 {
4842         struct qeth_cmd_buffer *iob;
4843
4844         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4845         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4846                 return -EOPNOTSUPP;
4847         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4848         if (!iob)
4849                 return -ENOMEM;
4850
4851         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb, link_info);
4852 }
4853
4854 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4855                                       struct qeth_reply *reply_priv,
4856                                       unsigned long data)
4857 {
4858         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4859         struct qeth_link_info *link_info = reply_priv->param;
4860         struct qeth_query_oat_physical_if *phys_if;
4861         struct qeth_query_oat_reply *reply;
4862
4863         if (qeth_setadpparms_inspect_rc(cmd))
4864                 return -EIO;
4865
4866         /* Multi-part reply is unexpected, don't bother: */
4867         if (cmd->data.setadapterparms.hdr.used_total > 1)
4868                 return -EINVAL;
4869
4870         /* Expect the reply to start with phys_if data: */
4871         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4872         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4873             reply->length < sizeof(*reply))
4874                 return -EINVAL;
4875
4876         phys_if = &reply->phys_if;
4877
4878         switch (phys_if->speed_duplex) {
4879         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4880                 link_info->speed = SPEED_10;
4881                 link_info->duplex = DUPLEX_HALF;
4882                 break;
4883         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4884                 link_info->speed = SPEED_10;
4885                 link_info->duplex = DUPLEX_FULL;
4886                 break;
4887         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4888                 link_info->speed = SPEED_100;
4889                 link_info->duplex = DUPLEX_HALF;
4890                 break;
4891         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4892                 link_info->speed = SPEED_100;
4893                 link_info->duplex = DUPLEX_FULL;
4894                 break;
4895         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4896                 link_info->speed = SPEED_1000;
4897                 link_info->duplex = DUPLEX_HALF;
4898                 break;
4899         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4900                 link_info->speed = SPEED_1000;
4901                 link_info->duplex = DUPLEX_FULL;
4902                 break;
4903         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4904                 link_info->speed = SPEED_10000;
4905                 link_info->duplex = DUPLEX_FULL;
4906                 break;
4907         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4908                 link_info->speed = SPEED_25000;
4909                 link_info->duplex = DUPLEX_FULL;
4910                 break;
4911         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4912         default:
4913                 link_info->speed = SPEED_UNKNOWN;
4914                 link_info->duplex = DUPLEX_UNKNOWN;
4915                 break;
4916         }
4917
4918         switch (phys_if->media_type) {
4919         case QETH_QOAT_PHYS_MEDIA_COPPER:
4920                 link_info->port = PORT_TP;
4921                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4922                 break;
4923         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4924                 link_info->port = PORT_FIBRE;
4925                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4926                 break;
4927         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4928                 link_info->port = PORT_FIBRE;
4929                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4930                 break;
4931         default:
4932                 link_info->port = PORT_OTHER;
4933                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4934                 break;
4935         }
4936
4937         return 0;
4938 }
4939
4940 static void qeth_init_link_info(struct qeth_card *card)
4941 {
4942         card->info.link_info.duplex = DUPLEX_FULL;
4943
4944         if (IS_IQD(card) || IS_VM_NIC(card)) {
4945                 card->info.link_info.speed = SPEED_10000;
4946                 card->info.link_info.port = PORT_FIBRE;
4947                 card->info.link_info.link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4948         } else {
4949                 switch (card->info.link_type) {
4950                 case QETH_LINK_TYPE_FAST_ETH:
4951                 case QETH_LINK_TYPE_LANE_ETH100:
4952                         card->info.link_info.speed = SPEED_100;
4953                         card->info.link_info.port = PORT_TP;
4954                         break;
4955                 case QETH_LINK_TYPE_GBIT_ETH:
4956                 case QETH_LINK_TYPE_LANE_ETH1000:
4957                         card->info.link_info.speed = SPEED_1000;
4958                         card->info.link_info.port = PORT_FIBRE;
4959                         break;
4960                 case QETH_LINK_TYPE_10GBIT_ETH:
4961                         card->info.link_info.speed = SPEED_10000;
4962                         card->info.link_info.port = PORT_FIBRE;
4963                         break;
4964                 case QETH_LINK_TYPE_25GBIT_ETH:
4965                         card->info.link_info.speed = SPEED_25000;
4966                         card->info.link_info.port = PORT_FIBRE;
4967                         break;
4968                 default:
4969                         dev_info(&card->gdev->dev, "Unknown link type %x\n",
4970                                  card->info.link_type);
4971                         card->info.link_info.speed = SPEED_UNKNOWN;
4972                         card->info.link_info.port = PORT_OTHER;
4973                 }
4974
4975                 card->info.link_info.link_mode = QETH_LINK_MODE_UNKNOWN;
4976         }
4977
4978         /* Get more accurate data via QUERY OAT: */
4979         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4980                 struct qeth_link_info link_info;
4981                 struct qeth_cmd_buffer *iob;
4982
4983                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4984                                            SETADP_DATA_SIZEOF(query_oat));
4985                 if (iob) {
4986                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4987                         struct qeth_query_oat *oat_req;
4988
4989                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4990                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4991
4992                         if (!qeth_send_ipa_cmd(card, iob,
4993                                                qeth_init_link_info_oat_cb,
4994                                                &link_info)) {
4995                                 if (link_info.speed != SPEED_UNKNOWN)
4996                                         card->info.link_info.speed = link_info.speed;
4997                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4998                                         card->info.link_info.duplex = link_info.duplex;
4999                                 if (link_info.port != PORT_OTHER)
5000                                         card->info.link_info.port = link_info.port;
5001                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
5002                                         card->info.link_info.link_mode = link_info.link_mode;
5003                         }
5004                 }
5005         }
5006 }
5007
5008 /**
5009  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
5010  * @card: pointer to a qeth_card
5011  *
5012  * Returns
5013  *      0, if a MAC address has been set for the card's netdevice
5014  *      a return code, for various error conditions
5015  */
5016 int qeth_vm_request_mac(struct qeth_card *card)
5017 {
5018         struct diag26c_mac_resp *response;
5019         struct diag26c_mac_req *request;
5020         int rc;
5021
5022         QETH_CARD_TEXT(card, 2, "vmreqmac");
5023
5024         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
5025         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
5026         if (!request || !response) {
5027                 rc = -ENOMEM;
5028                 goto out;
5029         }
5030
5031         request->resp_buf_len = sizeof(*response);
5032         request->resp_version = DIAG26C_VERSION2;
5033         request->op_code = DIAG26C_GET_MAC;
5034         request->devno = card->info.ddev_devno;
5035
5036         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5037         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
5038         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
5039         if (rc)
5040                 goto out;
5041         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
5042
5043         if (request->resp_buf_len < sizeof(*response) ||
5044             response->version != request->resp_version) {
5045                 rc = -EIO;
5046                 QETH_CARD_TEXT(card, 2, "badresp");
5047                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
5048                               sizeof(request->resp_buf_len));
5049         } else if (!is_valid_ether_addr(response->mac)) {
5050                 rc = -EINVAL;
5051                 QETH_CARD_TEXT(card, 2, "badmac");
5052                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
5053         } else {
5054                 ether_addr_copy(card->dev->dev_addr, response->mac);
5055         }
5056
5057 out:
5058         kfree(response);
5059         kfree(request);
5060         return rc;
5061 }
5062 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5063
5064 static void qeth_determine_capabilities(struct qeth_card *card)
5065 {
5066         struct qeth_channel *channel = &card->data;
5067         struct ccw_device *ddev = channel->ccwdev;
5068         int rc;
5069         int ddev_offline = 0;
5070
5071         QETH_CARD_TEXT(card, 2, "detcapab");
5072         if (!ddev->online) {
5073                 ddev_offline = 1;
5074                 rc = qeth_start_channel(channel);
5075                 if (rc) {
5076                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5077                         goto out;
5078                 }
5079         }
5080
5081         rc = qeth_read_conf_data(card);
5082         if (rc) {
5083                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5084                                  CARD_DEVID(card), rc);
5085                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5086                 goto out_offline;
5087         }
5088
5089         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5090         if (rc)
5091                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5092
5093         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5094         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5095         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5096         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5097         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5098         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5099             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5100             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5101                 dev_info(&card->gdev->dev,
5102                         "Completion Queueing supported\n");
5103         } else {
5104                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5105         }
5106
5107 out_offline:
5108         if (ddev_offline == 1)
5109                 qeth_stop_channel(channel);
5110 out:
5111         return;
5112 }
5113
5114 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5115 {
5116         struct qeth_card_info *info = &card->info;
5117         struct ccw_device *cdev = CARD_DDEV(card);
5118         struct ccw_dev_id dev_id;
5119
5120         QETH_CARD_TEXT(card, 2, "ccwconfd");
5121         ccw_device_get_id(cdev, &dev_id);
5122
5123         info->ddev_devno = dev_id.devno;
5124         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5125                           !ccw_device_get_iid(cdev, &info->iid) &&
5126                           !ccw_device_get_chid(cdev, 0, &info->chid);
5127         info->ssid = dev_id.ssid;
5128
5129         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5130                  info->chid, info->chpid);
5131
5132         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5133         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5134         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5135         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5136         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5137         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5138         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5139 }
5140
5141 static int qeth_qdio_establish(struct qeth_card *card)
5142 {
5143         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5144         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5145         struct qeth_qib_parms *qib_parms = NULL;
5146         struct qdio_initialize init_data;
5147         unsigned int i;
5148         int rc = 0;
5149
5150         QETH_CARD_TEXT(card, 2, "qdioest");
5151
5152         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5153                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5154                 if (!qib_parms)
5155                         return -ENOMEM;
5156
5157                 qeth_fill_qib_parms(card, qib_parms);
5158         }
5159
5160         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5161         if (card->options.cq == QETH_CQ_ENABLED)
5162                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5163
5164         for (i = 0; i < card->qdio.no_out_queues; i++)
5165                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5166
5167         memset(&init_data, 0, sizeof(struct qdio_initialize));
5168         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5169                                                           QDIO_QETH_QFMT;
5170         init_data.qib_param_field_format = 0;
5171         init_data.qib_param_field        = (void *)qib_parms;
5172         init_data.no_input_qs            = card->qdio.no_in_queues;
5173         init_data.no_output_qs           = card->qdio.no_out_queues;
5174         init_data.input_handler          = qeth_qdio_input_handler;
5175         init_data.output_handler         = qeth_qdio_output_handler;
5176         init_data.irq_poll               = qeth_qdio_poll;
5177         init_data.int_parm               = (unsigned long) card;
5178         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5179         init_data.output_sbal_addr_array = out_sbal_ptrs;
5180
5181         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5182                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5183                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5184                                    init_data.no_output_qs);
5185                 if (rc) {
5186                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5187                         goto out;
5188                 }
5189                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5190                 if (rc) {
5191                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5192                         qdio_free(CARD_DDEV(card));
5193                 }
5194         }
5195
5196         switch (card->options.cq) {
5197         case QETH_CQ_ENABLED:
5198                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5199                 break;
5200         case QETH_CQ_DISABLED:
5201                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5202                 break;
5203         default:
5204                 break;
5205         }
5206
5207 out:
5208         kfree(qib_parms);
5209         return rc;
5210 }
5211
5212 static void qeth_core_free_card(struct qeth_card *card)
5213 {
5214         QETH_CARD_TEXT(card, 2, "freecrd");
5215
5216         unregister_service_level(&card->qeth_service_level);
5217         debugfs_remove_recursive(card->debugfs);
5218         qeth_put_cmd(card->read_cmd);
5219         destroy_workqueue(card->event_wq);
5220         dev_set_drvdata(&card->gdev->dev, NULL);
5221         kfree(card);
5222 }
5223
5224 static void qeth_trace_features(struct qeth_card *card)
5225 {
5226         QETH_CARD_TEXT(card, 2, "features");
5227         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5228         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5229         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5230         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5231                       sizeof(card->info.diagass_support));
5232 }
5233
5234 static struct ccw_device_id qeth_ids[] = {
5235         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5236                                         .driver_info = QETH_CARD_TYPE_OSD},
5237         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5238                                         .driver_info = QETH_CARD_TYPE_IQD},
5239         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5240                                         .driver_info = QETH_CARD_TYPE_OSM},
5241 #ifdef CONFIG_QETH_OSX
5242         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5243                                         .driver_info = QETH_CARD_TYPE_OSX},
5244 #endif
5245         {},
5246 };
5247 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5248
5249 static struct ccw_driver qeth_ccw_driver = {
5250         .driver = {
5251                 .owner = THIS_MODULE,
5252                 .name = "qeth",
5253         },
5254         .ids = qeth_ids,
5255         .probe = ccwgroup_probe_ccwdev,
5256         .remove = ccwgroup_remove_ccwdev,
5257 };
5258
5259 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5260 {
5261         int retries = 3;
5262         int rc;
5263
5264         QETH_CARD_TEXT(card, 2, "hrdsetup");
5265         atomic_set(&card->force_alloc_skb, 0);
5266         rc = qeth_update_from_chp_desc(card);
5267         if (rc)
5268                 return rc;
5269 retry:
5270         if (retries < 3)
5271                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5272                                  CARD_DEVID(card));
5273         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5274         qeth_stop_channel(&card->data);
5275         qeth_stop_channel(&card->write);
5276         qeth_stop_channel(&card->read);
5277         qdio_free(CARD_DDEV(card));
5278
5279         rc = qeth_start_channel(&card->read);
5280         if (rc)
5281                 goto retriable;
5282         rc = qeth_start_channel(&card->write);
5283         if (rc)
5284                 goto retriable;
5285         rc = qeth_start_channel(&card->data);
5286         if (rc)
5287                 goto retriable;
5288 retriable:
5289         if (rc == -ERESTARTSYS) {
5290                 QETH_CARD_TEXT(card, 2, "break1");
5291                 return rc;
5292         } else if (rc) {
5293                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5294                 if (--retries < 0)
5295                         goto out;
5296                 else
5297                         goto retry;
5298         }
5299
5300         qeth_determine_capabilities(card);
5301         qeth_read_ccw_conf_data(card);
5302         qeth_idx_init(card);
5303
5304         rc = qeth_idx_activate_read_channel(card);
5305         if (rc == -EINTR) {
5306                 QETH_CARD_TEXT(card, 2, "break2");
5307                 return rc;
5308         } else if (rc) {
5309                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5310                 if (--retries < 0)
5311                         goto out;
5312                 else
5313                         goto retry;
5314         }
5315
5316         rc = qeth_idx_activate_write_channel(card);
5317         if (rc == -EINTR) {
5318                 QETH_CARD_TEXT(card, 2, "break3");
5319                 return rc;
5320         } else if (rc) {
5321                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5322                 if (--retries < 0)
5323                         goto out;
5324                 else
5325                         goto retry;
5326         }
5327         card->read_or_write_problem = 0;
5328         rc = qeth_mpc_initialize(card);
5329         if (rc) {
5330                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5331                 goto out;
5332         }
5333
5334         rc = qeth_send_startlan(card);
5335         if (rc) {
5336                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5337                 if (rc == -ENETDOWN) {
5338                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5339                         *carrier_ok = false;
5340                 } else {
5341                         goto out;
5342                 }
5343         } else {
5344                 *carrier_ok = true;
5345         }
5346
5347         card->options.ipa4.supported = 0;
5348         card->options.ipa6.supported = 0;
5349         card->options.adp.supported = 0;
5350         card->options.sbp.supported_funcs = 0;
5351         card->info.diagass_support = 0;
5352         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5353         if (rc == -ENOMEM)
5354                 goto out;
5355         if (qeth_is_supported(card, IPA_IPV6)) {
5356                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5357                 if (rc == -ENOMEM)
5358                         goto out;
5359         }
5360         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5361                 rc = qeth_query_setadapterparms(card);
5362                 if (rc < 0) {
5363                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5364                         goto out;
5365                 }
5366         }
5367         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5368                 rc = qeth_query_setdiagass(card);
5369                 if (rc)
5370                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5371         }
5372
5373         qeth_trace_features(card);
5374
5375         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5376             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5377                 card->info.hwtrap = 0;
5378
5379         if (card->options.isolation != ISOLATION_MODE_NONE) {
5380                 rc = qeth_setadpparms_set_access_ctrl(card,
5381                                                       card->options.isolation);
5382                 if (rc)
5383                         goto out;
5384         }
5385
5386         qeth_init_link_info(card);
5387
5388         rc = qeth_init_qdio_queues(card);
5389         if (rc) {
5390                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5391                 goto out;
5392         }
5393
5394         return 0;
5395 out:
5396         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5397                 "an error on the device\n");
5398         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5399                          CARD_DEVID(card), rc);
5400         return rc;
5401 }
5402
5403 static int qeth_set_online(struct qeth_card *card,
5404                            const struct qeth_discipline *disc)
5405 {
5406         bool carrier_ok;
5407         int rc;
5408
5409         mutex_lock(&card->conf_mutex);
5410         QETH_CARD_TEXT(card, 2, "setonlin");
5411
5412         rc = qeth_hardsetup_card(card, &carrier_ok);
5413         if (rc) {
5414                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5415                 rc = -ENODEV;
5416                 goto err_hardsetup;
5417         }
5418
5419         qeth_print_status_message(card);
5420
5421         if (card->dev->reg_state != NETREG_REGISTERED)
5422                 /* no need for locking / error handling at this early stage: */
5423                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5424
5425         rc = disc->set_online(card, carrier_ok);
5426         if (rc)
5427                 goto err_online;
5428
5429         /* let user_space know that device is online */
5430         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5431
5432         mutex_unlock(&card->conf_mutex);
5433         return 0;
5434
5435 err_online:
5436 err_hardsetup:
5437         qeth_qdio_clear_card(card, 0);
5438         qeth_clear_working_pool_list(card);
5439         qeth_flush_local_addrs(card);
5440
5441         qeth_stop_channel(&card->data);
5442         qeth_stop_channel(&card->write);
5443         qeth_stop_channel(&card->read);
5444         qdio_free(CARD_DDEV(card));
5445
5446         mutex_unlock(&card->conf_mutex);
5447         return rc;
5448 }
5449
5450 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5451                      bool resetting)
5452 {
5453         int rc, rc2, rc3;
5454
5455         mutex_lock(&card->conf_mutex);
5456         QETH_CARD_TEXT(card, 3, "setoffl");
5457
5458         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5459                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5460                 card->info.hwtrap = 1;
5461         }
5462
5463         /* cancel any stalled cmd that might block the rtnl: */
5464         qeth_clear_ipacmd_list(card);
5465
5466         rtnl_lock();
5467         card->info.open_when_online = card->dev->flags & IFF_UP;
5468         dev_close(card->dev);
5469         netif_device_detach(card->dev);
5470         netif_carrier_off(card->dev);
5471         rtnl_unlock();
5472
5473         cancel_work_sync(&card->rx_mode_work);
5474
5475         disc->set_offline(card);
5476
5477         qeth_qdio_clear_card(card, 0);
5478         qeth_drain_output_queues(card);
5479         qeth_clear_working_pool_list(card);
5480         qeth_flush_local_addrs(card);
5481         card->info.promisc_mode = 0;
5482
5483         rc  = qeth_stop_channel(&card->data);
5484         rc2 = qeth_stop_channel(&card->write);
5485         rc3 = qeth_stop_channel(&card->read);
5486         if (!rc)
5487                 rc = (rc2) ? rc2 : rc3;
5488         if (rc)
5489                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5490         qdio_free(CARD_DDEV(card));
5491
5492         /* let user_space know that device is offline */
5493         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5494
5495         mutex_unlock(&card->conf_mutex);
5496         return 0;
5497 }
5498 EXPORT_SYMBOL_GPL(qeth_set_offline);
5499
5500 static int qeth_do_reset(void *data)
5501 {
5502         const struct qeth_discipline *disc;
5503         struct qeth_card *card = data;
5504         int rc;
5505
5506         /* Lock-free, other users will block until we are done. */
5507         disc = card->discipline;
5508
5509         QETH_CARD_TEXT(card, 2, "recover1");
5510         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5511                 return 0;
5512         QETH_CARD_TEXT(card, 2, "recover2");
5513         dev_warn(&card->gdev->dev,
5514                  "A recovery process has been started for the device\n");
5515
5516         qeth_set_offline(card, disc, true);
5517         rc = qeth_set_online(card, disc);
5518         if (!rc) {
5519                 dev_info(&card->gdev->dev,
5520                          "Device successfully recovered!\n");
5521         } else {
5522                 ccwgroup_set_offline(card->gdev);
5523                 dev_warn(&card->gdev->dev,
5524                          "The qeth device driver failed to recover an error on the device\n");
5525         }
5526         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5527         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5528         return 0;
5529 }
5530
5531 #if IS_ENABLED(CONFIG_QETH_L3)
5532 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5533                                 struct qeth_hdr *hdr)
5534 {
5535         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5536         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5537         struct net_device *dev = skb->dev;
5538
5539         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5540                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5541                                 "FAKELL", skb->len);
5542                 return;
5543         }
5544
5545         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5546                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5547                                                              ETH_P_IP;
5548                 unsigned char tg_addr[ETH_ALEN];
5549
5550                 skb_reset_network_header(skb);
5551                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5552                 case QETH_CAST_MULTICAST:
5553                         if (prot == ETH_P_IP)
5554                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5555                         else
5556                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5557                         QETH_CARD_STAT_INC(card, rx_multicast);
5558                         break;
5559                 case QETH_CAST_BROADCAST:
5560                         ether_addr_copy(tg_addr, dev->broadcast);
5561                         QETH_CARD_STAT_INC(card, rx_multicast);
5562                         break;
5563                 default:
5564                         if (card->options.sniffer)
5565                                 skb->pkt_type = PACKET_OTHERHOST;
5566                         ether_addr_copy(tg_addr, dev->dev_addr);
5567                 }
5568
5569                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5570                         dev_hard_header(skb, dev, prot, tg_addr,
5571                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5572                 else
5573                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5574                                         skb->len);
5575         }
5576
5577         /* copy VLAN tag from hdr into skb */
5578         if (!card->options.sniffer &&
5579             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5580                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5581                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5582                                 l3_hdr->vlan_id :
5583                                 l3_hdr->next_hop.rx.vlan_id;
5584
5585                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5586         }
5587 }
5588 #endif
5589
5590 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5591                              struct qeth_hdr *hdr, bool uses_frags)
5592 {
5593         struct napi_struct *napi = &card->napi;
5594         bool is_cso;
5595
5596         switch (hdr->hdr.l2.id) {
5597 #if IS_ENABLED(CONFIG_QETH_L3)
5598         case QETH_HEADER_TYPE_LAYER3:
5599                 qeth_l3_rebuild_skb(card, skb, hdr);
5600                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5601                 break;
5602 #endif
5603         case QETH_HEADER_TYPE_LAYER2:
5604                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5605                 break;
5606         default:
5607                 /* never happens */
5608                 if (uses_frags)
5609                         napi_free_frags(napi);
5610                 else
5611                         dev_kfree_skb_any(skb);
5612                 return;
5613         }
5614
5615         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5616                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5617                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5618         } else {
5619                 skb->ip_summed = CHECKSUM_NONE;
5620         }
5621
5622         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5623         QETH_CARD_STAT_INC(card, rx_packets);
5624         if (skb_is_nonlinear(skb)) {
5625                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5626                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5627                                    skb_shinfo(skb)->nr_frags);
5628         }
5629
5630         if (uses_frags) {
5631                 napi_gro_frags(napi);
5632         } else {
5633                 skb->protocol = eth_type_trans(skb, skb->dev);
5634                 napi_gro_receive(napi, skb);
5635         }
5636 }
5637
5638 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5639 {
5640         struct page *page = virt_to_page(data);
5641         unsigned int next_frag;
5642
5643         next_frag = skb_shinfo(skb)->nr_frags;
5644         get_page(page);
5645         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5646                         data_len);
5647 }
5648
5649 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5650 {
5651         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5652 }
5653
5654 static int qeth_extract_skb(struct qeth_card *card,
5655                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5656                             int *__offset)
5657 {
5658         struct qeth_priv *priv = netdev_priv(card->dev);
5659         struct qdio_buffer *buffer = qethbuffer->buffer;
5660         struct napi_struct *napi = &card->napi;
5661         struct qdio_buffer_element *element;
5662         unsigned int linear_len = 0;
5663         bool uses_frags = false;
5664         int offset = *__offset;
5665         bool use_rx_sg = false;
5666         unsigned int headroom;
5667         struct qeth_hdr *hdr;
5668         struct sk_buff *skb;
5669         int skb_len = 0;
5670
5671         element = &buffer->element[*element_no];
5672
5673 next_packet:
5674         /* qeth_hdr must not cross element boundaries */
5675         while (element->length < offset + sizeof(struct qeth_hdr)) {
5676                 if (qeth_is_last_sbale(element))
5677                         return -ENODATA;
5678                 element++;
5679                 offset = 0;
5680         }
5681
5682         hdr = phys_to_virt(element->addr) + offset;
5683         offset += sizeof(*hdr);
5684         skb = NULL;
5685
5686         switch (hdr->hdr.l2.id) {
5687         case QETH_HEADER_TYPE_LAYER2:
5688                 skb_len = hdr->hdr.l2.pkt_length;
5689                 linear_len = ETH_HLEN;
5690                 headroom = 0;
5691                 break;
5692         case QETH_HEADER_TYPE_LAYER3:
5693                 skb_len = hdr->hdr.l3.length;
5694                 if (!IS_LAYER3(card)) {
5695                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5696                         goto walk_packet;
5697                 }
5698
5699                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5700                         linear_len = ETH_HLEN;
5701                         headroom = 0;
5702                         break;
5703                 }
5704
5705                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5706                         linear_len = sizeof(struct ipv6hdr);
5707                 else
5708                         linear_len = sizeof(struct iphdr);
5709                 headroom = ETH_HLEN;
5710                 break;
5711         default:
5712                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5713                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5714                 else
5715                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5716
5717                 /* Can't determine packet length, drop the whole buffer. */
5718                 return -EPROTONOSUPPORT;
5719         }
5720
5721         if (skb_len < linear_len) {
5722                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5723                 goto walk_packet;
5724         }
5725
5726         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5727                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5728                      !atomic_read(&card->force_alloc_skb));
5729
5730         if (use_rx_sg) {
5731                 /* QETH_CQ_ENABLED only: */
5732                 if (qethbuffer->rx_skb &&
5733                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5734                         skb = qethbuffer->rx_skb;
5735                         qethbuffer->rx_skb = NULL;
5736                         goto use_skb;
5737                 }
5738
5739                 skb = napi_get_frags(napi);
5740                 if (!skb) {
5741                         /* -ENOMEM, no point in falling back further. */
5742                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5743                         goto walk_packet;
5744                 }
5745
5746                 if (skb_tailroom(skb) >= linear_len + headroom) {
5747                         uses_frags = true;
5748                         goto use_skb;
5749                 }
5750
5751                 netdev_info_once(card->dev,
5752                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5753                                  linear_len + headroom, skb_tailroom(skb));
5754                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5755         }
5756
5757         linear_len = skb_len;
5758         skb = napi_alloc_skb(napi, linear_len + headroom);
5759         if (!skb) {
5760                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5761                 goto walk_packet;
5762         }
5763
5764 use_skb:
5765         if (headroom)
5766                 skb_reserve(skb, headroom);
5767 walk_packet:
5768         while (skb_len) {
5769                 int data_len = min(skb_len, (int)(element->length - offset));
5770                 char *data = phys_to_virt(element->addr) + offset;
5771
5772                 skb_len -= data_len;
5773                 offset += data_len;
5774
5775                 /* Extract data from current element: */
5776                 if (skb && data_len) {
5777                         if (linear_len) {
5778                                 unsigned int copy_len;
5779
5780                                 copy_len = min_t(unsigned int, linear_len,
5781                                                  data_len);
5782
5783                                 skb_put_data(skb, data, copy_len);
5784                                 linear_len -= copy_len;
5785                                 data_len -= copy_len;
5786                                 data += copy_len;
5787                         }
5788
5789                         if (data_len)
5790                                 qeth_create_skb_frag(skb, data, data_len);
5791                 }
5792
5793                 /* Step forward to next element: */
5794                 if (skb_len) {
5795                         if (qeth_is_last_sbale(element)) {
5796                                 QETH_CARD_TEXT(card, 4, "unexeob");
5797                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5798                                 if (skb) {
5799                                         if (uses_frags)
5800                                                 napi_free_frags(napi);
5801                                         else
5802                                                 dev_kfree_skb_any(skb);
5803                                         QETH_CARD_STAT_INC(card,
5804                                                            rx_length_errors);
5805                                 }
5806                                 return -EMSGSIZE;
5807                         }
5808                         element++;
5809                         offset = 0;
5810                 }
5811         }
5812
5813         /* This packet was skipped, go get another one: */
5814         if (!skb)
5815                 goto next_packet;
5816
5817         *element_no = element - &buffer->element[0];
5818         *__offset = offset;
5819
5820         qeth_receive_skb(card, skb, hdr, uses_frags);
5821         return 0;
5822 }
5823
5824 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5825                                       struct qeth_qdio_buffer *buf, bool *done)
5826 {
5827         unsigned int work_done = 0;
5828
5829         while (budget) {
5830                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5831                                      &card->rx.e_offset)) {
5832                         *done = true;
5833                         break;
5834                 }
5835
5836                 work_done++;
5837                 budget--;
5838         }
5839
5840         return work_done;
5841 }
5842
5843 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5844 {
5845         struct qeth_rx *ctx = &card->rx;
5846         unsigned int work_done = 0;
5847
5848         while (budget > 0) {
5849                 struct qeth_qdio_buffer *buffer;
5850                 unsigned int skbs_done = 0;
5851                 bool done = false;
5852
5853                 /* Fetch completed RX buffers: */
5854                 if (!card->rx.b_count) {
5855                         card->rx.qdio_err = 0;
5856                         card->rx.b_count = qdio_inspect_queue(CARD_DDEV(card),
5857                                                               0, true,
5858                                                               &card->rx.b_index,
5859                                                               &card->rx.qdio_err);
5860                         if (card->rx.b_count <= 0) {
5861                                 card->rx.b_count = 0;
5862                                 break;
5863                         }
5864                 }
5865
5866                 /* Process one completed RX buffer: */
5867                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5868                 if (!(card->rx.qdio_err &&
5869                       qeth_check_qdio_errors(card, buffer->buffer,
5870                                              card->rx.qdio_err, "qinerr")))
5871                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5872                                                       &done);
5873                 else
5874                         done = true;
5875
5876                 work_done += skbs_done;
5877                 budget -= skbs_done;
5878
5879                 if (done) {
5880                         QETH_CARD_STAT_INC(card, rx_bufs);
5881                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5882                         buffer->pool_entry = NULL;
5883                         card->rx.b_count--;
5884                         ctx->bufs_refill++;
5885                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5886                                                                  ctx->bufs_refill);
5887
5888                         /* Step forward to next buffer: */
5889                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5890                         card->rx.buf_element = 0;
5891                         card->rx.e_offset = 0;
5892                 }
5893         }
5894
5895         return work_done;
5896 }
5897
5898 static void qeth_cq_poll(struct qeth_card *card)
5899 {
5900         unsigned int work_done = 0;
5901
5902         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5903                 unsigned int start, error;
5904                 int completed;
5905
5906                 completed = qdio_inspect_queue(CARD_DDEV(card), 1, true, &start,
5907                                                &error);
5908                 if (completed <= 0)
5909                         return;
5910
5911                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5912                 work_done += completed;
5913         }
5914 }
5915
5916 int qeth_poll(struct napi_struct *napi, int budget)
5917 {
5918         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5919         unsigned int work_done;
5920
5921         work_done = qeth_rx_poll(card, budget);
5922
5923         if (qeth_use_tx_irqs(card)) {
5924                 struct qeth_qdio_out_q *queue;
5925                 unsigned int i;
5926
5927                 qeth_for_each_output_queue(card, queue, i) {
5928                         if (!qeth_out_queue_is_empty(queue))
5929                                 napi_schedule(&queue->napi);
5930                 }
5931         }
5932
5933         if (card->options.cq == QETH_CQ_ENABLED)
5934                 qeth_cq_poll(card);
5935
5936         if (budget) {
5937                 struct qeth_rx *ctx = &card->rx;
5938
5939                 /* Process any substantial refill backlog: */
5940                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5941
5942                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5943                 if (work_done >= budget)
5944                         return work_done;
5945         }
5946
5947         if (napi_complete_done(napi, work_done) &&
5948             qdio_start_irq(CARD_DDEV(card)))
5949                 napi_schedule(napi);
5950
5951         return work_done;
5952 }
5953 EXPORT_SYMBOL_GPL(qeth_poll);
5954
5955 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5956                                  unsigned int bidx, unsigned int qdio_error,
5957                                  int budget)
5958 {
5959         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5960         u8 sflags = buffer->buffer->element[15].sflags;
5961         struct qeth_card *card = queue->card;
5962         bool error = !!qdio_error;
5963
5964         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5965                 struct qaob *aob = buffer->aob;
5966                 struct qeth_qaob_priv1 *priv;
5967                 enum iucv_tx_notify notify;
5968
5969                 if (!aob) {
5970                         netdev_WARN_ONCE(card->dev,
5971                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5972                                          bidx, queue->queue_no);
5973                         qeth_schedule_recovery(card);
5974                         return;
5975                 }
5976
5977                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5978
5979                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5980                 /* QAOB hasn't completed yet: */
5981                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5982                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5983
5984                         /* Prepare the queue slot for immediate re-use: */
5985                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5986                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5987                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5988                                 qeth_schedule_recovery(card);
5989                         }
5990
5991                         list_add(&buffer->list_entry, &queue->pending_bufs);
5992                         /* Skip clearing the buffer: */
5993                         return;
5994                 }
5995
5996                 /* QAOB already completed: */
5997                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5998                 qeth_notify_skbs(queue, buffer, notify);
5999                 error = !!aob->aorc;
6000                 memset(aob, 0, sizeof(*aob));
6001         } else if (card->options.cq == QETH_CQ_ENABLED) {
6002                 qeth_notify_skbs(queue, buffer,
6003                                  qeth_compute_cq_notification(sflags, 0));
6004         }
6005
6006         qeth_clear_output_buffer(queue, buffer, error, budget);
6007 }
6008
6009 static int qeth_tx_poll(struct napi_struct *napi, int budget)
6010 {
6011         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
6012         unsigned int queue_no = queue->queue_no;
6013         struct qeth_card *card = queue->card;
6014         struct net_device *dev = card->dev;
6015         unsigned int work_done = 0;
6016         struct netdev_queue *txq;
6017
6018         if (IS_IQD(card))
6019                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
6020         else
6021                 txq = netdev_get_tx_queue(dev, queue_no);
6022
6023         while (1) {
6024                 unsigned int start, error, i;
6025                 unsigned int packets = 0;
6026                 unsigned int bytes = 0;
6027                 int completed;
6028
6029                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
6030
6031                 if (qeth_out_queue_is_empty(queue)) {
6032                         napi_complete(napi);
6033                         return 0;
6034                 }
6035
6036                 /* Give the CPU a breather: */
6037                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
6038                         QETH_TXQ_STAT_INC(queue, completion_yield);
6039                         if (napi_complete_done(napi, 0))
6040                                 napi_schedule(napi);
6041                         return 0;
6042                 }
6043
6044                 completed = qdio_inspect_queue(CARD_DDEV(card), queue_no, false,
6045                                                &start, &error);
6046                 if (completed <= 0) {
6047                         /* Ensure we see TX completion for pending work: */
6048                         if (napi_complete_done(napi, 0) &&
6049                             !atomic_read(&queue->set_pci_flags_count))
6050                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
6051                         return 0;
6052                 }
6053
6054                 for (i = start; i < start + completed; i++) {
6055                         struct qeth_qdio_out_buffer *buffer;
6056                         unsigned int bidx = QDIO_BUFNR(i);
6057
6058                         buffer = queue->bufs[bidx];
6059                         packets += buffer->frames;
6060                         bytes += buffer->bytes;
6061
6062                         qeth_handle_send_error(card, buffer, error);
6063                         if (IS_IQD(card))
6064                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
6065                         else
6066                                 qeth_clear_output_buffer(queue, buffer, error,
6067                                                          budget);
6068                 }
6069
6070                 atomic_sub(completed, &queue->used_buffers);
6071                 work_done += completed;
6072                 if (IS_IQD(card))
6073                         netdev_tx_completed_queue(txq, packets, bytes);
6074                 else
6075                         qeth_check_outbound_queue(queue);
6076
6077                 /* xmit may have observed the full-condition, but not yet
6078                  * stopped the txq. In which case the code below won't trigger.
6079                  * So before returning, xmit will re-check the txq's fill level
6080                  * and wake it up if needed.
6081                  */
6082                 if (netif_tx_queue_stopped(txq) &&
6083                     !qeth_out_queue_is_full(queue))
6084                         netif_tx_wake_queue(txq);
6085         }
6086 }
6087
6088 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6089 {
6090         if (!cmd->hdr.return_code)
6091                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6092         return cmd->hdr.return_code;
6093 }
6094
6095 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6096                                         struct qeth_reply *reply,
6097                                         unsigned long data)
6098 {
6099         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6100         struct qeth_ipa_caps *caps = reply->param;
6101
6102         if (qeth_setassparms_inspect_rc(cmd))
6103                 return -EIO;
6104
6105         caps->supported = cmd->data.setassparms.data.caps.supported;
6106         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6107         return 0;
6108 }
6109
6110 int qeth_setassparms_cb(struct qeth_card *card,
6111                         struct qeth_reply *reply, unsigned long data)
6112 {
6113         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6114
6115         QETH_CARD_TEXT(card, 4, "defadpcb");
6116
6117         if (cmd->hdr.return_code)
6118                 return -EIO;
6119
6120         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6121         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6122                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6123         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6124                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6125         return 0;
6126 }
6127 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6128
6129 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6130                                                  enum qeth_ipa_funcs ipa_func,
6131                                                  u16 cmd_code,
6132                                                  unsigned int data_length,
6133                                                  enum qeth_prot_versions prot)
6134 {
6135         struct qeth_ipacmd_setassparms *setassparms;
6136         struct qeth_ipacmd_setassparms_hdr *hdr;
6137         struct qeth_cmd_buffer *iob;
6138
6139         QETH_CARD_TEXT(card, 4, "getasscm");
6140         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6141                                  data_length +
6142                                  offsetof(struct qeth_ipacmd_setassparms,
6143                                           data));
6144         if (!iob)
6145                 return NULL;
6146
6147         setassparms = &__ipa_cmd(iob)->data.setassparms;
6148         setassparms->assist_no = ipa_func;
6149
6150         hdr = &setassparms->hdr;
6151         hdr->length = sizeof(*hdr) + data_length;
6152         hdr->command_code = cmd_code;
6153         return iob;
6154 }
6155 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6156
6157 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6158                                       enum qeth_ipa_funcs ipa_func,
6159                                       u16 cmd_code, u32 *data,
6160                                       enum qeth_prot_versions prot)
6161 {
6162         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6163         struct qeth_cmd_buffer *iob;
6164
6165         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6166         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6167         if (!iob)
6168                 return -ENOMEM;
6169
6170         if (data)
6171                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6172         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6173 }
6174 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6175
6176 static void qeth_unregister_dbf_views(void)
6177 {
6178         int x;
6179
6180         for (x = 0; x < QETH_DBF_INFOS; x++) {
6181                 debug_unregister(qeth_dbf[x].id);
6182                 qeth_dbf[x].id = NULL;
6183         }
6184 }
6185
6186 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6187 {
6188         char dbf_txt_buf[32];
6189         va_list args;
6190
6191         if (!debug_level_enabled(id, level))
6192                 return;
6193         va_start(args, fmt);
6194         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6195         va_end(args);
6196         debug_text_event(id, level, dbf_txt_buf);
6197 }
6198 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6199
6200 static int qeth_register_dbf_views(void)
6201 {
6202         int ret;
6203         int x;
6204
6205         for (x = 0; x < QETH_DBF_INFOS; x++) {
6206                 /* register the areas */
6207                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6208                                                 qeth_dbf[x].pages,
6209                                                 qeth_dbf[x].areas,
6210                                                 qeth_dbf[x].len);
6211                 if (qeth_dbf[x].id == NULL) {
6212                         qeth_unregister_dbf_views();
6213                         return -ENOMEM;
6214                 }
6215
6216                 /* register a view */
6217                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6218                 if (ret) {
6219                         qeth_unregister_dbf_views();
6220                         return ret;
6221                 }
6222
6223                 /* set a passing level */
6224                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6225         }
6226
6227         return 0;
6228 }
6229
6230 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6231
6232 int qeth_setup_discipline(struct qeth_card *card,
6233                           enum qeth_discipline_id discipline)
6234 {
6235         int rc;
6236
6237         mutex_lock(&qeth_mod_mutex);
6238         switch (discipline) {
6239         case QETH_DISCIPLINE_LAYER3:
6240                 card->discipline = try_then_request_module(
6241                         symbol_get(qeth_l3_discipline), "qeth_l3");
6242                 break;
6243         case QETH_DISCIPLINE_LAYER2:
6244                 card->discipline = try_then_request_module(
6245                         symbol_get(qeth_l2_discipline), "qeth_l2");
6246                 break;
6247         default:
6248                 break;
6249         }
6250         mutex_unlock(&qeth_mod_mutex);
6251
6252         if (!card->discipline) {
6253                 dev_err(&card->gdev->dev, "There is no kernel module to "
6254                         "support discipline %d\n", discipline);
6255                 return -EINVAL;
6256         }
6257
6258         rc = card->discipline->setup(card->gdev);
6259         if (rc) {
6260                 if (discipline == QETH_DISCIPLINE_LAYER2)
6261                         symbol_put(qeth_l2_discipline);
6262                 else
6263                         symbol_put(qeth_l3_discipline);
6264                 card->discipline = NULL;
6265
6266                 return rc;
6267         }
6268
6269         card->options.layer = discipline;
6270         return 0;
6271 }
6272
6273 void qeth_remove_discipline(struct qeth_card *card)
6274 {
6275         card->discipline->remove(card->gdev);
6276
6277         if (IS_LAYER2(card))
6278                 symbol_put(qeth_l2_discipline);
6279         else
6280                 symbol_put(qeth_l3_discipline);
6281         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6282         card->discipline = NULL;
6283 }
6284
6285 static const struct device_type qeth_generic_devtype = {
6286         .name = "qeth_generic",
6287 };
6288
6289 #define DBF_NAME_LEN    20
6290
6291 struct qeth_dbf_entry {
6292         char dbf_name[DBF_NAME_LEN];
6293         debug_info_t *dbf_info;
6294         struct list_head dbf_list;
6295 };
6296
6297 static LIST_HEAD(qeth_dbf_list);
6298 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6299
6300 static debug_info_t *qeth_get_dbf_entry(char *name)
6301 {
6302         struct qeth_dbf_entry *entry;
6303         debug_info_t *rc = NULL;
6304
6305         mutex_lock(&qeth_dbf_list_mutex);
6306         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6307                 if (strcmp(entry->dbf_name, name) == 0) {
6308                         rc = entry->dbf_info;
6309                         break;
6310                 }
6311         }
6312         mutex_unlock(&qeth_dbf_list_mutex);
6313         return rc;
6314 }
6315
6316 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6317 {
6318         struct qeth_dbf_entry *new_entry;
6319
6320         card->debug = debug_register(name, 2, 1, 8);
6321         if (!card->debug) {
6322                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6323                 goto err;
6324         }
6325         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6326                 goto err_dbg;
6327         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6328         if (!new_entry)
6329                 goto err_dbg;
6330         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
6331         new_entry->dbf_info = card->debug;
6332         mutex_lock(&qeth_dbf_list_mutex);
6333         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6334         mutex_unlock(&qeth_dbf_list_mutex);
6335
6336         return 0;
6337
6338 err_dbg:
6339         debug_unregister(card->debug);
6340 err:
6341         return -ENOMEM;
6342 }
6343
6344 static void qeth_clear_dbf_list(void)
6345 {
6346         struct qeth_dbf_entry *entry, *tmp;
6347
6348         mutex_lock(&qeth_dbf_list_mutex);
6349         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6350                 list_del(&entry->dbf_list);
6351                 debug_unregister(entry->dbf_info);
6352                 kfree(entry);
6353         }
6354         mutex_unlock(&qeth_dbf_list_mutex);
6355 }
6356
6357 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6358 {
6359         struct net_device *dev;
6360         struct qeth_priv *priv;
6361
6362         switch (card->info.type) {
6363         case QETH_CARD_TYPE_IQD:
6364                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6365                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6366                 break;
6367         case QETH_CARD_TYPE_OSM:
6368                 dev = alloc_etherdev(sizeof(*priv));
6369                 break;
6370         default:
6371                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6372         }
6373
6374         if (!dev)
6375                 return NULL;
6376
6377         priv = netdev_priv(dev);
6378         priv->rx_copybreak = QETH_RX_COPYBREAK;
6379         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6380
6381         dev->ml_priv = card;
6382         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6383         dev->min_mtu = 576;
6384          /* initialized when device first goes online: */
6385         dev->max_mtu = 0;
6386         dev->mtu = 0;
6387         SET_NETDEV_DEV(dev, &card->gdev->dev);
6388         netif_carrier_off(dev);
6389
6390         dev->ethtool_ops = &qeth_ethtool_ops;
6391         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6392         dev->hw_features |= NETIF_F_SG;
6393         dev->vlan_features |= NETIF_F_SG;
6394         if (IS_IQD(card))
6395                 dev->features |= NETIF_F_SG;
6396
6397         return dev;
6398 }
6399
6400 struct net_device *qeth_clone_netdev(struct net_device *orig)
6401 {
6402         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6403
6404         if (!clone)
6405                 return NULL;
6406
6407         clone->dev_port = orig->dev_port;
6408         return clone;
6409 }
6410
6411 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6412 {
6413         struct qeth_card *card;
6414         struct device *dev;
6415         int rc;
6416         enum qeth_discipline_id enforced_disc;
6417         char dbf_name[DBF_NAME_LEN];
6418
6419         QETH_DBF_TEXT(SETUP, 2, "probedev");
6420
6421         dev = &gdev->dev;
6422         if (!get_device(dev))
6423                 return -ENODEV;
6424
6425         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6426
6427         card = qeth_alloc_card(gdev);
6428         if (!card) {
6429                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6430                 rc = -ENOMEM;
6431                 goto err_dev;
6432         }
6433
6434         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6435                 dev_name(&gdev->dev));
6436         card->debug = qeth_get_dbf_entry(dbf_name);
6437         if (!card->debug) {
6438                 rc = qeth_add_dbf_entry(card, dbf_name);
6439                 if (rc)
6440                         goto err_card;
6441         }
6442
6443         qeth_setup_card(card);
6444         card->dev = qeth_alloc_netdev(card);
6445         if (!card->dev) {
6446                 rc = -ENOMEM;
6447                 goto err_card;
6448         }
6449
6450         qeth_determine_capabilities(card);
6451         qeth_set_blkt_defaults(card);
6452
6453         card->qdio.no_out_queues = card->dev->num_tx_queues;
6454         rc = qeth_update_from_chp_desc(card);
6455         if (rc)
6456                 goto err_chp_desc;
6457
6458         gdev->dev.groups = qeth_dev_groups;
6459
6460         enforced_disc = qeth_enforce_discipline(card);
6461         switch (enforced_disc) {
6462         case QETH_DISCIPLINE_UNDETERMINED:
6463                 gdev->dev.type = &qeth_generic_devtype;
6464                 break;
6465         default:
6466                 card->info.layer_enforced = true;
6467                 /* It's so early that we don't need the discipline_mutex yet. */
6468                 rc = qeth_setup_discipline(card, enforced_disc);
6469                 if (rc)
6470                         goto err_setup_disc;
6471
6472                 break;
6473         }
6474
6475         return 0;
6476
6477 err_setup_disc:
6478 err_chp_desc:
6479         free_netdev(card->dev);
6480 err_card:
6481         qeth_core_free_card(card);
6482 err_dev:
6483         put_device(dev);
6484         return rc;
6485 }
6486
6487 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6488 {
6489         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6490
6491         QETH_CARD_TEXT(card, 2, "removedv");
6492
6493         mutex_lock(&card->discipline_mutex);
6494         if (card->discipline)
6495                 qeth_remove_discipline(card);
6496         mutex_unlock(&card->discipline_mutex);
6497
6498         qeth_free_qdio_queues(card);
6499
6500         free_netdev(card->dev);
6501         qeth_core_free_card(card);
6502         put_device(&gdev->dev);
6503 }
6504
6505 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6506 {
6507         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6508         int rc = 0;
6509         enum qeth_discipline_id def_discipline;
6510
6511         mutex_lock(&card->discipline_mutex);
6512         if (!card->discipline) {
6513                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6514                                                 QETH_DISCIPLINE_LAYER2;
6515                 rc = qeth_setup_discipline(card, def_discipline);
6516                 if (rc)
6517                         goto err;
6518         }
6519
6520         rc = qeth_set_online(card, card->discipline);
6521
6522 err:
6523         mutex_unlock(&card->discipline_mutex);
6524         return rc;
6525 }
6526
6527 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6528 {
6529         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6530         int rc;
6531
6532         mutex_lock(&card->discipline_mutex);
6533         rc = qeth_set_offline(card, card->discipline, false);
6534         mutex_unlock(&card->discipline_mutex);
6535
6536         return rc;
6537 }
6538
6539 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6540 {
6541         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6542
6543         qeth_set_allowed_threads(card, 0, 1);
6544         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6545                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6546         qeth_qdio_clear_card(card, 0);
6547         qeth_drain_output_queues(card);
6548         qdio_free(CARD_DDEV(card));
6549 }
6550
6551 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6552                            size_t count)
6553 {
6554         int err;
6555
6556         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6557                                   buf);
6558
6559         return err ? err : count;
6560 }
6561 static DRIVER_ATTR_WO(group);
6562
6563 static struct attribute *qeth_drv_attrs[] = {
6564         &driver_attr_group.attr,
6565         NULL,
6566 };
6567 static struct attribute_group qeth_drv_attr_group = {
6568         .attrs = qeth_drv_attrs,
6569 };
6570 static const struct attribute_group *qeth_drv_attr_groups[] = {
6571         &qeth_drv_attr_group,
6572         NULL,
6573 };
6574
6575 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6576         .driver = {
6577                 .groups = qeth_drv_attr_groups,
6578                 .owner = THIS_MODULE,
6579                 .name = "qeth",
6580         },
6581         .ccw_driver = &qeth_ccw_driver,
6582         .setup = qeth_core_probe_device,
6583         .remove = qeth_core_remove_device,
6584         .set_online = qeth_core_set_online,
6585         .set_offline = qeth_core_set_offline,
6586         .shutdown = qeth_core_shutdown,
6587 };
6588
6589 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6590 {
6591         struct qeth_card *card = dev->ml_priv;
6592         int rc = 0;
6593
6594         switch (cmd) {
6595         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6596                 rc = qeth_snmp_command(card, data);
6597                 break;
6598         case SIOC_QETH_GET_CARD_TYPE:
6599                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6600                     !IS_VM_NIC(card))
6601                         return 1;
6602                 return 0;
6603         case SIOC_QETH_QUERY_OAT:
6604                 rc = qeth_query_oat_command(card, data);
6605                 break;
6606         default:
6607                 if (card->discipline->do_ioctl)
6608                         rc = card->discipline->do_ioctl(dev, rq, data, cmd);
6609                 else
6610                         rc = -EOPNOTSUPP;
6611         }
6612         if (rc)
6613                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6614         return rc;
6615 }
6616 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6617
6618 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6619 {
6620         struct qeth_card *card = dev->ml_priv;
6621         struct mii_ioctl_data *mii_data;
6622         int rc = 0;
6623
6624         switch (cmd) {
6625         case SIOCGMIIPHY:
6626                 mii_data = if_mii(rq);
6627                 mii_data->phy_id = 0;
6628                 break;
6629         case SIOCGMIIREG:
6630                 mii_data = if_mii(rq);
6631                 if (mii_data->phy_id != 0)
6632                         rc = -EINVAL;
6633                 else
6634                         mii_data->val_out = qeth_mdio_read(dev,
6635                                 mii_data->phy_id, mii_data->reg_num);
6636                 break;
6637         default:
6638                 return -EOPNOTSUPP;
6639         }
6640         if (rc)
6641                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6642         return rc;
6643 }
6644 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6645
6646 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6647                               unsigned long data)
6648 {
6649         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6650         u32 *features = reply->param;
6651
6652         if (qeth_setassparms_inspect_rc(cmd))
6653                 return -EIO;
6654
6655         *features = cmd->data.setassparms.data.flags_32bit;
6656         return 0;
6657 }
6658
6659 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6660                              enum qeth_prot_versions prot)
6661 {
6662         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6663                                                  NULL, prot);
6664 }
6665
6666 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6667                             enum qeth_prot_versions prot, u8 *lp2lp)
6668 {
6669         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6670         struct qeth_cmd_buffer *iob;
6671         struct qeth_ipa_caps caps;
6672         u32 features;
6673         int rc;
6674
6675         /* some L3 HW requires combined L3+L4 csum offload: */
6676         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6677             cstype == IPA_OUTBOUND_CHECKSUM)
6678                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6679
6680         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6681                                        prot);
6682         if (!iob)
6683                 return -ENOMEM;
6684
6685         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6686         if (rc)
6687                 return rc;
6688
6689         if ((required_features & features) != required_features) {
6690                 qeth_set_csum_off(card, cstype, prot);
6691                 return -EOPNOTSUPP;
6692         }
6693
6694         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6695                                        SETASS_DATA_SIZEOF(flags_32bit),
6696                                        prot);
6697         if (!iob) {
6698                 qeth_set_csum_off(card, cstype, prot);
6699                 return -ENOMEM;
6700         }
6701
6702         if (features & QETH_IPA_CHECKSUM_LP2LP)
6703                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6704         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6705         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6706         if (rc) {
6707                 qeth_set_csum_off(card, cstype, prot);
6708                 return rc;
6709         }
6710
6711         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6712             !qeth_ipa_caps_enabled(&caps, required_features)) {
6713                 qeth_set_csum_off(card, cstype, prot);
6714                 return -EOPNOTSUPP;
6715         }
6716
6717         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6718                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6719
6720         if (lp2lp)
6721                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6722
6723         return 0;
6724 }
6725
6726 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6727                              enum qeth_prot_versions prot, u8 *lp2lp)
6728 {
6729         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6730                     qeth_set_csum_off(card, cstype, prot);
6731 }
6732
6733 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6734                              unsigned long data)
6735 {
6736         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6737         struct qeth_tso_start_data *tso_data = reply->param;
6738
6739         if (qeth_setassparms_inspect_rc(cmd))
6740                 return -EIO;
6741
6742         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6743         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6744         return 0;
6745 }
6746
6747 static int qeth_set_tso_off(struct qeth_card *card,
6748                             enum qeth_prot_versions prot)
6749 {
6750         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6751                                                  IPA_CMD_ASS_STOP, NULL, prot);
6752 }
6753
6754 static int qeth_set_tso_on(struct qeth_card *card,
6755                            enum qeth_prot_versions prot)
6756 {
6757         struct qeth_tso_start_data tso_data;
6758         struct qeth_cmd_buffer *iob;
6759         struct qeth_ipa_caps caps;
6760         int rc;
6761
6762         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6763                                        IPA_CMD_ASS_START, 0, prot);
6764         if (!iob)
6765                 return -ENOMEM;
6766
6767         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6768         if (rc)
6769                 return rc;
6770
6771         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6772                 qeth_set_tso_off(card, prot);
6773                 return -EOPNOTSUPP;
6774         }
6775
6776         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6777                                        IPA_CMD_ASS_ENABLE,
6778                                        SETASS_DATA_SIZEOF(caps), prot);
6779         if (!iob) {
6780                 qeth_set_tso_off(card, prot);
6781                 return -ENOMEM;
6782         }
6783
6784         /* enable TSO capability */
6785         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6786                 QETH_IPA_LARGE_SEND_TCP;
6787         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6788         if (rc) {
6789                 qeth_set_tso_off(card, prot);
6790                 return rc;
6791         }
6792
6793         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6794             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6795                 qeth_set_tso_off(card, prot);
6796                 return -EOPNOTSUPP;
6797         }
6798
6799         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6800                  tso_data.mss);
6801         return 0;
6802 }
6803
6804 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6805                             enum qeth_prot_versions prot)
6806 {
6807         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6808 }
6809
6810 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6811 {
6812         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6813         int rc_ipv6;
6814
6815         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6816                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6817                                             QETH_PROT_IPV4, NULL);
6818         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6819                 /* no/one Offload Assist available, so the rc is trivial */
6820                 return rc_ipv4;
6821
6822         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6823                                     QETH_PROT_IPV6, NULL);
6824
6825         if (on)
6826                 /* enable: success if any Assist is active */
6827                 return (rc_ipv6) ? rc_ipv4 : 0;
6828
6829         /* disable: failure if any Assist is still active */
6830         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6831 }
6832
6833 /**
6834  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6835  * @dev:        a net_device
6836  */
6837 void qeth_enable_hw_features(struct net_device *dev)
6838 {
6839         struct qeth_card *card = dev->ml_priv;
6840         netdev_features_t features;
6841
6842         features = dev->features;
6843         /* force-off any feature that might need an IPA sequence.
6844          * netdev_update_features() will restart them.
6845          */
6846         dev->features &= ~dev->hw_features;
6847         /* toggle VLAN filter, so that VIDs are re-programmed: */
6848         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6849                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6850                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6851         }
6852         netdev_update_features(dev);
6853         if (features != dev->features)
6854                 dev_warn(&card->gdev->dev,
6855                          "Device recovery failed to restore all offload features\n");
6856 }
6857 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6858
6859 static void qeth_check_restricted_features(struct qeth_card *card,
6860                                            netdev_features_t changed,
6861                                            netdev_features_t actual)
6862 {
6863         netdev_features_t ipv6_features = NETIF_F_TSO6;
6864         netdev_features_t ipv4_features = NETIF_F_TSO;
6865
6866         if (!card->info.has_lp2lp_cso_v6)
6867                 ipv6_features |= NETIF_F_IPV6_CSUM;
6868         if (!card->info.has_lp2lp_cso_v4)
6869                 ipv4_features |= NETIF_F_IP_CSUM;
6870
6871         if ((changed & ipv6_features) && !(actual & ipv6_features))
6872                 qeth_flush_local_addrs6(card);
6873         if ((changed & ipv4_features) && !(actual & ipv4_features))
6874                 qeth_flush_local_addrs4(card);
6875 }
6876
6877 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6878 {
6879         struct qeth_card *card = dev->ml_priv;
6880         netdev_features_t changed = dev->features ^ features;
6881         int rc = 0;
6882
6883         QETH_CARD_TEXT(card, 2, "setfeat");
6884         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6885
6886         if ((changed & NETIF_F_IP_CSUM)) {
6887                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6888                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6889                                        &card->info.has_lp2lp_cso_v4);
6890                 if (rc)
6891                         changed ^= NETIF_F_IP_CSUM;
6892         }
6893         if (changed & NETIF_F_IPV6_CSUM) {
6894                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6895                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6896                                        &card->info.has_lp2lp_cso_v6);
6897                 if (rc)
6898                         changed ^= NETIF_F_IPV6_CSUM;
6899         }
6900         if (changed & NETIF_F_RXCSUM) {
6901                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6902                 if (rc)
6903                         changed ^= NETIF_F_RXCSUM;
6904         }
6905         if (changed & NETIF_F_TSO) {
6906                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6907                                       QETH_PROT_IPV4);
6908                 if (rc)
6909                         changed ^= NETIF_F_TSO;
6910         }
6911         if (changed & NETIF_F_TSO6) {
6912                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6913                                       QETH_PROT_IPV6);
6914                 if (rc)
6915                         changed ^= NETIF_F_TSO6;
6916         }
6917
6918         qeth_check_restricted_features(card, dev->features ^ features,
6919                                        dev->features ^ changed);
6920
6921         /* everything changed successfully? */
6922         if ((dev->features ^ features) == changed)
6923                 return 0;
6924         /* something went wrong. save changed features and return error */
6925         dev->features ^= changed;
6926         return -EIO;
6927 }
6928 EXPORT_SYMBOL_GPL(qeth_set_features);
6929
6930 netdev_features_t qeth_fix_features(struct net_device *dev,
6931                                     netdev_features_t features)
6932 {
6933         struct qeth_card *card = dev->ml_priv;
6934
6935         QETH_CARD_TEXT(card, 2, "fixfeat");
6936         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6937                 features &= ~NETIF_F_IP_CSUM;
6938         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6939                 features &= ~NETIF_F_IPV6_CSUM;
6940         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6941             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6942                 features &= ~NETIF_F_RXCSUM;
6943         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6944                 features &= ~NETIF_F_TSO;
6945         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6946                 features &= ~NETIF_F_TSO6;
6947
6948         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6949         return features;
6950 }
6951 EXPORT_SYMBOL_GPL(qeth_fix_features);
6952
6953 netdev_features_t qeth_features_check(struct sk_buff *skb,
6954                                       struct net_device *dev,
6955                                       netdev_features_t features)
6956 {
6957         struct qeth_card *card = dev->ml_priv;
6958
6959         /* Traffic with local next-hop is not eligible for some offloads: */
6960         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6961             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6962                 netdev_features_t restricted = 0;
6963
6964                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6965                         restricted |= NETIF_F_ALL_TSO;
6966
6967                 switch (vlan_get_protocol(skb)) {
6968                 case htons(ETH_P_IP):
6969                         if (!card->info.has_lp2lp_cso_v4)
6970                                 restricted |= NETIF_F_IP_CSUM;
6971
6972                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6973                                 features &= ~restricted;
6974                         break;
6975                 case htons(ETH_P_IPV6):
6976                         if (!card->info.has_lp2lp_cso_v6)
6977                                 restricted |= NETIF_F_IPV6_CSUM;
6978
6979                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6980                                 features &= ~restricted;
6981                         break;
6982                 default:
6983                         break;
6984                 }
6985         }
6986
6987         /* GSO segmentation builds skbs with
6988          *      a (small) linear part for the headers, and
6989          *      page frags for the data.
6990          * Compared to a linear skb, the header-only part consumes an
6991          * additional buffer element. This reduces buffer utilization, and
6992          * hurts throughput. So compress small segments into one element.
6993          */
6994         if (netif_needs_gso(skb, features)) {
6995                 /* match skb_segment(): */
6996                 unsigned int doffset = skb->data - skb_mac_header(skb);
6997                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6998                 unsigned int hroom = skb_headroom(skb);
6999
7000                 /* linearize only if resulting skb allocations are order-0: */
7001                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
7002                         features &= ~NETIF_F_SG;
7003         }
7004
7005         return vlan_features_check(skb, features);
7006 }
7007 EXPORT_SYMBOL_GPL(qeth_features_check);
7008
7009 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
7010 {
7011         struct qeth_card *card = dev->ml_priv;
7012         struct qeth_qdio_out_q *queue;
7013         unsigned int i;
7014
7015         QETH_CARD_TEXT(card, 5, "getstat");
7016
7017         stats->rx_packets = card->stats.rx_packets;
7018         stats->rx_bytes = card->stats.rx_bytes;
7019         stats->rx_errors = card->stats.rx_length_errors +
7020                            card->stats.rx_frame_errors +
7021                            card->stats.rx_fifo_errors;
7022         stats->rx_dropped = card->stats.rx_dropped_nomem +
7023                             card->stats.rx_dropped_notsupp +
7024                             card->stats.rx_dropped_runt;
7025         stats->multicast = card->stats.rx_multicast;
7026         stats->rx_length_errors = card->stats.rx_length_errors;
7027         stats->rx_frame_errors = card->stats.rx_frame_errors;
7028         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
7029
7030         for (i = 0; i < card->qdio.no_out_queues; i++) {
7031                 queue = card->qdio.out_qs[i];
7032
7033                 stats->tx_packets += queue->stats.tx_packets;
7034                 stats->tx_bytes += queue->stats.tx_bytes;
7035                 stats->tx_errors += queue->stats.tx_errors;
7036                 stats->tx_dropped += queue->stats.tx_dropped;
7037         }
7038 }
7039 EXPORT_SYMBOL_GPL(qeth_get_stats64);
7040
7041 #define TC_IQD_UCAST   0
7042 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
7043                                      unsigned int ucast_txqs)
7044 {
7045         unsigned int prio;
7046
7047         /* IQD requires mcast traffic to be placed on a dedicated queue, and
7048          * qeth_iqd_select_queue() deals with this.
7049          * For unicast traffic, we defer the queue selection to the stack.
7050          * By installing a trivial prio map that spans over only the unicast
7051          * queues, we can encourage the stack to spread the ucast traffic evenly
7052          * without selecting the mcast queue.
7053          */
7054
7055         /* One traffic class, spanning over all active ucast queues: */
7056         netdev_set_num_tc(dev, 1);
7057         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
7058                             QETH_IQD_MIN_UCAST_TXQ);
7059
7060         /* Map all priorities to this traffic class: */
7061         for (prio = 0; prio <= TC_BITMASK; prio++)
7062                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7063 }
7064
7065 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7066 {
7067         struct net_device *dev = card->dev;
7068         int rc;
7069
7070         /* Per netif_setup_tc(), adjust the mapping first: */
7071         if (IS_IQD(card))
7072                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7073
7074         rc = netif_set_real_num_tx_queues(dev, count);
7075
7076         if (rc && IS_IQD(card))
7077                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7078
7079         return rc;
7080 }
7081 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7082
7083 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7084                           u8 cast_type, struct net_device *sb_dev)
7085 {
7086         u16 txq;
7087
7088         if (cast_type != RTN_UNICAST)
7089                 return QETH_IQD_MCAST_TXQ;
7090         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7091                 return QETH_IQD_MIN_UCAST_TXQ;
7092
7093         txq = netdev_pick_tx(dev, skb, sb_dev);
7094         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7095 }
7096 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7097
7098 int qeth_open(struct net_device *dev)
7099 {
7100         struct qeth_card *card = dev->ml_priv;
7101         struct qeth_qdio_out_q *queue;
7102         unsigned int i;
7103
7104         QETH_CARD_TEXT(card, 4, "qethopen");
7105
7106         card->data.state = CH_STATE_UP;
7107         netif_tx_start_all_queues(dev);
7108
7109         local_bh_disable();
7110         qeth_for_each_output_queue(card, queue, i) {
7111                 netif_tx_napi_add(dev, &queue->napi, qeth_tx_poll,
7112                                   QETH_NAPI_WEIGHT);
7113                 napi_enable(&queue->napi);
7114                 napi_schedule(&queue->napi);
7115         }
7116
7117         napi_enable(&card->napi);
7118         napi_schedule(&card->napi);
7119         /* kick-start the NAPI softirq: */
7120         local_bh_enable();
7121
7122         return 0;
7123 }
7124 EXPORT_SYMBOL_GPL(qeth_open);
7125
7126 int qeth_stop(struct net_device *dev)
7127 {
7128         struct qeth_card *card = dev->ml_priv;
7129         struct qeth_qdio_out_q *queue;
7130         unsigned int i;
7131
7132         QETH_CARD_TEXT(card, 4, "qethstop");
7133
7134         napi_disable(&card->napi);
7135         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7136         qdio_stop_irq(CARD_DDEV(card));
7137
7138         /* Quiesce the NAPI instances: */
7139         qeth_for_each_output_queue(card, queue, i)
7140                 napi_disable(&queue->napi);
7141
7142         /* Stop .ndo_start_xmit, might still access queue->napi. */
7143         netif_tx_disable(dev);
7144
7145         qeth_for_each_output_queue(card, queue, i) {
7146                 del_timer_sync(&queue->timer);
7147                 /* Queues may get re-allocated, so remove the NAPIs. */
7148                 netif_napi_del(&queue->napi);
7149         }
7150
7151         return 0;
7152 }
7153 EXPORT_SYMBOL_GPL(qeth_stop);
7154
7155 static int __init qeth_core_init(void)
7156 {
7157         int rc;
7158
7159         pr_info("loading core functions\n");
7160
7161         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7162
7163         rc = qeth_register_dbf_views();
7164         if (rc)
7165                 goto dbf_err;
7166         qeth_core_root_dev = root_device_register("qeth");
7167         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7168         if (rc)
7169                 goto register_err;
7170         qeth_core_header_cache =
7171                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7172                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7173                                   0, NULL);
7174         if (!qeth_core_header_cache) {
7175                 rc = -ENOMEM;
7176                 goto slab_err;
7177         }
7178         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7179                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7180         if (!qeth_qdio_outbuf_cache) {
7181                 rc = -ENOMEM;
7182                 goto cqslab_err;
7183         }
7184         rc = ccw_driver_register(&qeth_ccw_driver);
7185         if (rc)
7186                 goto ccw_err;
7187         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7188         if (rc)
7189                 goto ccwgroup_err;
7190
7191         return 0;
7192
7193 ccwgroup_err:
7194         ccw_driver_unregister(&qeth_ccw_driver);
7195 ccw_err:
7196         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7197 cqslab_err:
7198         kmem_cache_destroy(qeth_core_header_cache);
7199 slab_err:
7200         root_device_unregister(qeth_core_root_dev);
7201 register_err:
7202         qeth_unregister_dbf_views();
7203 dbf_err:
7204         debugfs_remove_recursive(qeth_debugfs_root);
7205         pr_err("Initializing the qeth device driver failed\n");
7206         return rc;
7207 }
7208
7209 static void __exit qeth_core_exit(void)
7210 {
7211         qeth_clear_dbf_list();
7212         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7213         ccw_driver_unregister(&qeth_ccw_driver);
7214         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7215         kmem_cache_destroy(qeth_core_header_cache);
7216         root_device_unregister(qeth_core_root_dev);
7217         qeth_unregister_dbf_views();
7218         debugfs_remove_recursive(qeth_debugfs_root);
7219         pr_info("core functions removed\n");
7220 }
7221
7222 module_init(qeth_core_init);
7223 module_exit(qeth_core_exit);
7224 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7225 MODULE_DESCRIPTION("qeth core functions");
7226 MODULE_LICENSE("GPL");