drivers/s390/net/qeth_core_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/compat.h>
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/log2.h>
  20 #include <linux/io.h>
  21 #include <linux/ip.h>
  22 #include <linux/tcp.h>
  23 #include <linux/mii.h>
  24 #include <linux/mm.h>
  25 #include <linux/kthread.h>
  26 #include <linux/slab.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netdev_features.h>
  30 #include <linux/rcutree.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/vmalloc.h>
  33
  34 #include <net/iucv/af_iucv.h>
  35 #include <net/dsfield.h>
  36 #include <net/sock.h>
  37
  38 #include <asm/ebcdic.h>
  39 #include <asm/chpid.h>
  40 #include <asm/sysinfo.h>
  41 #include <asm/diag.h>
  42 #include <asm/cio.h>
  43 #include <asm/ccwdev.h>
  44 #include <asm/cpcmd.h>
  45
  46 #include "qeth_core.h"
  47
  48 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  49         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  50         /*                   N  P  A    M  L  V                      H  */
  51         [QETH_DBF_SETUP] = {"qeth_setup",
  52                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  53         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  54                             &debug_sprintf_view, NULL},
  55         [QETH_DBF_CTRL]  = {"qeth_control",
  56                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  57 };
  58 EXPORT_SYMBOL_GPL(qeth_dbf);
  59
  60 static struct kmem_cache *qeth_core_header_cache;
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62 static struct kmem_cache *qeth_qaob_cache;
  63
  64 static struct device *qeth_core_root_dev;
  65 static struct dentry *qeth_debugfs_root;
  66 static struct lock_class_key qdio_out_skb_queue_key;
  67
  68 static void qeth_issue_next_read_cb(struct qeth_card *card,
  69                                     struct qeth_cmd_buffer *iob,
  70                                     unsigned int data_length);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_queues(struct qeth_card *card);
  73
  74 static const char *qeth_get_cardname(struct qeth_card *card)
  75 {
  76         if (IS_VM_NIC(card)) {
  77                 switch (card->info.type) {
  78                 case QETH_CARD_TYPE_OSD:
  79                         return " Virtual NIC QDIO";
  80                 case QETH_CARD_TYPE_IQD:
  81                         return " Virtual NIC Hiper";
  82                 case QETH_CARD_TYPE_OSM:
  83                         return " Virtual NIC QDIO - OSM";
  84                 case QETH_CARD_TYPE_OSX:
  85                         return " Virtual NIC QDIO - OSX";
  86                 default:
  87                         return " unknown";
  88                 }
  89         } else {
  90                 switch (card->info.type) {
  91                 case QETH_CARD_TYPE_OSD:
  92                         return " OSD Express";
  93                 case QETH_CARD_TYPE_IQD:
  94                         return " HiperSockets";
  95                 case QETH_CARD_TYPE_OSM:
  96                         return " OSM QDIO";
  97                 case QETH_CARD_TYPE_OSX:
  98                         return " OSX QDIO";
  99                 default:
 100                         return " unknown";
 101                 }
 102         }
 103         return " n/a";
 104 }
 105
 106 /* max length to be returned: 14 */
 107 const char *qeth_get_cardname_short(struct qeth_card *card)
 108 {
 109         if (IS_VM_NIC(card)) {
 110                 switch (card->info.type) {
 111                 case QETH_CARD_TYPE_OSD:
 112                         return "Virt.NIC QDIO";
 113                 case QETH_CARD_TYPE_IQD:
 114                         return "Virt.NIC Hiper";
 115                 case QETH_CARD_TYPE_OSM:
 116                         return "Virt.NIC OSM";
 117                 case QETH_CARD_TYPE_OSX:
 118                         return "Virt.NIC OSX";
 119                 default:
 120                         return "unknown";
 121                 }
 122         } else {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         switch (card->info.link_type) {
 126                         case QETH_LINK_TYPE_FAST_ETH:
 127                                 return "OSD_100";
 128                         case QETH_LINK_TYPE_HSTR:
 129                                 return "HSTR";
 130                         case QETH_LINK_TYPE_GBIT_ETH:
 131                                 return "OSD_1000";
 132                         case QETH_LINK_TYPE_10GBIT_ETH:
 133                                 return "OSD_10GIG";
 134                         case QETH_LINK_TYPE_25GBIT_ETH:
 135                                 return "OSD_25GIG";
 136                         case QETH_LINK_TYPE_LANE_ETH100:
 137                                 return "OSD_FE_LANE";
 138                         case QETH_LINK_TYPE_LANE_TR:
 139                                 return "OSD_TR_LANE";
 140                         case QETH_LINK_TYPE_LANE_ETH1000:
 141                                 return "OSD_GbE_LANE";
 142                         case QETH_LINK_TYPE_LANE:
 143                                 return "OSD_ATM_LANE";
 144                         default:
 145                                 return "OSD_Express";
 146                         }
 147                 case QETH_CARD_TYPE_IQD:
 148                         return "HiperSockets";
 149                 case QETH_CARD_TYPE_OSM:
 150                         return "OSM_1000";
 151                 case QETH_CARD_TYPE_OSX:
 152                         return "OSX_10GIG";
 153                 default:
 154                         return "unknown";
 155                 }
 156         }
 157         return "n/a";
 158 }
 159
 160 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 161                          int clear_start_mask)
 162 {
 163         unsigned long flags;
 164
 165         spin_lock_irqsave(&card->thread_mask_lock, flags);
 166         card->thread_allowed_mask = threads;
 167         if (clear_start_mask)
 168                 card->thread_start_mask &= threads;
 169         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 170         wake_up(&card->wait_q);
 171 }
 172 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 173
 174 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 175 {
 176         unsigned long flags;
 177         int rc = 0;
 178
 179         spin_lock_irqsave(&card->thread_mask_lock, flags);
 180         rc = (card->thread_running_mask & threads);
 181         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 182         return rc;
 183 }
 184 EXPORT_SYMBOL_GPL(qeth_threads_running);
 185
 186 static void qeth_clear_working_pool_list(struct qeth_card *card)
 187 {
 188         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 189         struct qeth_qdio_q *queue = card->qdio.in_q;
 190         unsigned int i;
 191
 192         QETH_CARD_TEXT(card, 5, "clwrklst");
 193         list_for_each_entry_safe(pool_entry, tmp,
 194                                  &card->qdio.in_buf_pool.entry_list, list)
 195                 list_del(&pool_entry->list);
 196
 197         for (i = 0; i < ARRAY_SIZE(queue->bufs); i++)
 198                 queue->bufs[i].pool_entry = NULL;
 199 }
 200
 201 static void qeth_free_pool_entry(struct qeth_buffer_pool_entry *entry)
 202 {
 203         unsigned int i;
 204
 205         for (i = 0; i < ARRAY_SIZE(entry->elements); i++) {
 206                 if (entry->elements[i])
 207                         __free_page(entry->elements[i]);
 208         }
 209
 210         kfree(entry);
 211 }
 212
 213 static void qeth_free_buffer_pool(struct qeth_card *card)
 214 {
 215         struct qeth_buffer_pool_entry *entry, *tmp;
 216
 217         list_for_each_entry_safe(entry, tmp, &card->qdio.init_pool.entry_list,
 218                                  init_list) {
 219                 list_del(&entry->init_list);
 220                 qeth_free_pool_entry(entry);
 221         }
 222 }
 223
 224 static struct qeth_buffer_pool_entry *qeth_alloc_pool_entry(unsigned int pages)
 225 {
 226         struct qeth_buffer_pool_entry *entry;
 227         unsigned int i;
 228
 229         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
 230         if (!entry)
 231                 return NULL;
 232
 233         for (i = 0; i < pages; i++) {
 234                 entry->elements[i] = __dev_alloc_page(GFP_KERNEL);
 235
 236                 if (!entry->elements[i]) {
 237                         qeth_free_pool_entry(entry);
 238                         return NULL;
 239                 }
 240         }
 241
 242         return entry;
 243 }
 244
 245 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 246 {
 247         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 248         unsigned int i;
 249
 250         QETH_CARD_TEXT(card, 5, "alocpool");
 251         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 252                 struct qeth_buffer_pool_entry *entry;
 253
 254                 entry = qeth_alloc_pool_entry(buf_elements);
 255                 if (!entry) {
 256                         qeth_free_buffer_pool(card);
 257                         return -ENOMEM;
 258                 }
 259
 260                 list_add(&entry->init_list, &card->qdio.init_pool.entry_list);
 261         }
 262         return 0;
 263 }
 264
 265 int qeth_resize_buffer_pool(struct qeth_card *card, unsigned int count)
 266 {
 267         unsigned int buf_elements = QETH_MAX_BUFFER_ELEMENTS(card);
 268         struct qeth_qdio_buffer_pool *pool = &card->qdio.init_pool;
 269         struct qeth_buffer_pool_entry *entry, *tmp;
 270         int delta = count - pool->buf_count;
 271         LIST_HEAD(entries);
 272
 273         QETH_CARD_TEXT(card, 2, "realcbp");
 274
 275         /* Defer until pool is allocated: */
 276         if (list_empty(&pool->entry_list))
 277                 goto out;
 278
 279         /* Remove entries from the pool: */
 280         while (delta < 0) {
 281                 entry = list_first_entry(&pool->entry_list,
 282                                          struct qeth_buffer_pool_entry,
 283                                          init_list);
 284                 list_del(&entry->init_list);
 285                 qeth_free_pool_entry(entry);
 286
 287                 delta++;
 288         }
 289
 290         /* Allocate additional entries: */
 291         while (delta > 0) {
 292                 entry = qeth_alloc_pool_entry(buf_elements);
 293                 if (!entry) {
 294                         list_for_each_entry_safe(entry, tmp, &entries,
 295                                                  init_list) {
 296                                 list_del(&entry->init_list);
 297                                 qeth_free_pool_entry(entry);
 298                         }
 299
 300                         return -ENOMEM;
 301                 }
 302
 303                 list_add(&entry->init_list, &entries);
 304
 305                 delta--;
 306         }
 307
 308         list_splice(&entries, &pool->entry_list);
 309
 310 out:
 311         card->qdio.in_buf_pool.buf_count = count;
 312         pool->buf_count = count;
 313         return 0;
 314 }
 315 EXPORT_SYMBOL_GPL(qeth_resize_buffer_pool);
 316
 317 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 318 {
 319         if (!q)
 320                 return;
 321
 322         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 323         kfree(q);
 324 }
 325
 326 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 327 {
 328         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 329         int i;
 330
 331         if (!q)
 332                 return NULL;
 333
 334         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 335                 kfree(q);
 336                 return NULL;
 337         }
 338
 339         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 340                 q->bufs[i].buffer = q->qdio_bufs[i];
 341
 342         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 343         return q;
 344 }
 345
 346 static int qeth_cq_init(struct qeth_card *card)
 347 {
 348         int rc;
 349
 350         if (card->options.cq == QETH_CQ_ENABLED) {
 351                 QETH_CARD_TEXT(card, 2, "cqinit");
 352                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 353                                    QDIO_MAX_BUFFERS_PER_Q);
 354                 card->qdio.c_q->next_buf_to_init = 127;
 355
 356                 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 1, 0, 127);
 357                 if (rc) {
 358                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 359                         goto out;
 360                 }
 361         }
 362         rc = 0;
 363 out:
 364         return rc;
 365 }
 366
 367 static int qeth_alloc_cq(struct qeth_card *card)
 368 {
 369         if (card->options.cq == QETH_CQ_ENABLED) {
 370                 QETH_CARD_TEXT(card, 2, "cqon");
 371                 card->qdio.c_q = qeth_alloc_qdio_queue();
 372                 if (!card->qdio.c_q) {
 373                         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 374                         return -ENOMEM;
 375                 }
 376         } else {
 377                 QETH_CARD_TEXT(card, 2, "nocq");
 378                 card->qdio.c_q = NULL;
 379         }
 380         return 0;
 381 }
 382
 383 static void qeth_free_cq(struct qeth_card *card)
 384 {
 385         if (card->qdio.c_q) {
 386                 qeth_free_qdio_queue(card->qdio.c_q);
 387                 card->qdio.c_q = NULL;
 388         }
 389 }
 390
 391 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 392                                                         int delayed)
 393 {
 394         enum iucv_tx_notify n;
 395
 396         switch (sbalf15) {
 397         case 0:
 398                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 399                 break;
 400         case 4:
 401         case 16:
 402         case 17:
 403         case 18:
 404                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 405                         TX_NOTIFY_UNREACHABLE;
 406                 break;
 407         default:
 408                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 409                         TX_NOTIFY_GENERALERROR;
 410                 break;
 411         }
 412
 413         return n;
 414 }
 415
 416 static void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 417 {
 418         if (refcount_dec_and_test(&iob->ref_count)) {
 419                 kfree(iob->data);
 420                 kfree(iob);
 421         }
 422 }
 423 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 424                            void *data)
 425 {
 426         ccw->cmd_code = cmd_code;
 427         ccw->flags = flags | CCW_FLAG_SLI;
 428         ccw->count = len;
 429         ccw->cda = virt_to_dma32(data);
 430 }
 431
 432 static int __qeth_issue_next_read(struct qeth_card *card)
 433 {
 434         struct qeth_cmd_buffer *iob = card->read_cmd;
 435         struct qeth_channel *channel = iob->channel;
 436         struct ccw1 *ccw = __ccw_from_cmd(iob);
 437         int rc;
 438
 439         QETH_CARD_TEXT(card, 5, "issnxrd");
 440         if (channel->state != CH_STATE_UP)
 441                 return -EIO;
 442
 443         memset(iob->data, 0, iob->length);
 444         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 445         iob->callback = qeth_issue_next_read_cb;
 446         /* keep the cmd alive after completion: */
 447         qeth_get_cmd(iob);
 448
 449         QETH_CARD_TEXT(card, 6, "noirqpnd");
 450         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 451         if (!rc) {
 452                 channel->active_cmd = iob;
 453         } else {
 454                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 455                                  rc, CARD_DEVID(card));
 456                 qeth_unlock_channel(card, channel);
 457                 qeth_put_cmd(iob);
 458                 card->read_or_write_problem = 1;
 459                 qeth_schedule_recovery(card);
 460         }
 461         return rc;
 462 }
 463
 464 static int qeth_issue_next_read(struct qeth_card *card)
 465 {
 466         int ret;
 467
 468         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 469         ret = __qeth_issue_next_read(card);
 470         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 471
 472         return ret;
 473 }
 474
 475 static void qeth_enqueue_cmd(struct qeth_card *card,
 476                              struct qeth_cmd_buffer *iob)
 477 {
 478         spin_lock_irq(&card->lock);
 479         list_add_tail(&iob->list_entry, &card->cmd_waiter_list);
 480         spin_unlock_irq(&card->lock);
 481 }
 482
 483 static void qeth_dequeue_cmd(struct qeth_card *card,
 484                              struct qeth_cmd_buffer *iob)
 485 {
 486         spin_lock_irq(&card->lock);
 487         list_del(&iob->list_entry);
 488         spin_unlock_irq(&card->lock);
 489 }
 490
 491 static void qeth_notify_cmd(struct qeth_cmd_buffer *iob, int reason)
 492 {
 493         iob->rc = reason;
 494         complete(&iob->done);
 495 }
 496
 497 static void qeth_flush_local_addrs4(struct qeth_card *card)
 498 {
 499         struct qeth_local_addr *addr;
 500         struct hlist_node *tmp;
 501         unsigned int i;
 502
 503         spin_lock_irq(&card->local_addrs4_lock);
 504         hash_for_each_safe(card->local_addrs4, i, tmp, addr, hnode) {
 505                 hash_del_rcu(&addr->hnode);
 506                 kfree_rcu(addr, rcu);
 507         }
 508         spin_unlock_irq(&card->local_addrs4_lock);
 509 }
 510
 511 static void qeth_flush_local_addrs6(struct qeth_card *card)
 512 {
 513         struct qeth_local_addr *addr;
 514         struct hlist_node *tmp;
 515         unsigned int i;
 516
 517         spin_lock_irq(&card->local_addrs6_lock);
 518         hash_for_each_safe(card->local_addrs6, i, tmp, addr, hnode) {
 519                 hash_del_rcu(&addr->hnode);
 520                 kfree_rcu(addr, rcu);
 521         }
 522         spin_unlock_irq(&card->local_addrs6_lock);
 523 }
 524
 525 static void qeth_flush_local_addrs(struct qeth_card *card)
 526 {
 527         qeth_flush_local_addrs4(card);
 528         qeth_flush_local_addrs6(card);
 529 }
 530
 531 static void qeth_add_local_addrs4(struct qeth_card *card,
 532                                   struct qeth_ipacmd_local_addrs4 *cmd)
 533 {
 534         unsigned int i;
 535
 536         if (cmd->addr_length !=
 537             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 538                 dev_err_ratelimited(&card->gdev->dev,
 539                                     "Dropped IPv4 ADD LOCAL ADDR event with bad length %u\n",
 540                                     cmd->addr_length);
 541                 return;
 542         }
 543
 544         spin_lock(&card->local_addrs4_lock);
 545         for (i = 0; i < cmd->count; i++) {
 546                 unsigned int key = ipv4_addr_hash(cmd->addrs[i].addr);
 547                 struct qeth_local_addr *addr;
 548                 bool duplicate = false;
 549
 550                 hash_for_each_possible(card->local_addrs4, addr, hnode, key) {
 551                         if (addr->addr.s6_addr32[3] == cmd->addrs[i].addr) {
 552                                 duplicate = true;
 553                                 break;
 554                         }
 555                 }
 556
 557                 if (duplicate)
 558                         continue;
 559
 560                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 561                 if (!addr) {
 562                         dev_err(&card->gdev->dev,
 563                                 "Failed to allocate local addr object. Traffic to %pI4 might suffer.\n",
 564                                 &cmd->addrs[i].addr);
 565                         continue;
 566                 }
 567
 568                 ipv6_addr_set(&addr->addr, 0, 0, 0, cmd->addrs[i].addr);
 569                 hash_add_rcu(card->local_addrs4, &addr->hnode, key);
 570         }
 571         spin_unlock(&card->local_addrs4_lock);
 572 }
 573
 574 static void qeth_add_local_addrs6(struct qeth_card *card,
 575                                   struct qeth_ipacmd_local_addrs6 *cmd)
 576 {
 577         unsigned int i;
 578
 579         if (cmd->addr_length !=
 580             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 581                 dev_err_ratelimited(&card->gdev->dev,
 582                                     "Dropped IPv6 ADD LOCAL ADDR event with bad length %u\n",
 583                                     cmd->addr_length);
 584                 return;
 585         }
 586
 587         spin_lock(&card->local_addrs6_lock);
 588         for (i = 0; i < cmd->count; i++) {
 589                 u32 key = ipv6_addr_hash(&cmd->addrs[i].addr);
 590                 struct qeth_local_addr *addr;
 591                 bool duplicate = false;
 592
 593                 hash_for_each_possible(card->local_addrs6, addr, hnode, key) {
 594                         if (ipv6_addr_equal(&addr->addr, &cmd->addrs[i].addr)) {
 595                                 duplicate = true;
 596                                 break;
 597                         }
 598                 }
 599
 600                 if (duplicate)
 601                         continue;
 602
 603                 addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
 604                 if (!addr) {
 605                         dev_err(&card->gdev->dev,
 606                                 "Failed to allocate local addr object. Traffic to %pI6c might suffer.\n",
 607                                 &cmd->addrs[i].addr);
 608                         continue;
 609                 }
 610
 611                 addr->addr = cmd->addrs[i].addr;
 612                 hash_add_rcu(card->local_addrs6, &addr->hnode, key);
 613         }
 614         spin_unlock(&card->local_addrs6_lock);
 615 }
 616
 617 static void qeth_del_local_addrs4(struct qeth_card *card,
 618                                   struct qeth_ipacmd_local_addrs4 *cmd)
 619 {
 620         unsigned int i;
 621
 622         if (cmd->addr_length !=
 623             sizeof_field(struct qeth_ipacmd_local_addr4, addr)) {
 624                 dev_err_ratelimited(&card->gdev->dev,
 625                                     "Dropped IPv4 DEL LOCAL ADDR event with bad length %u\n",
 626                                     cmd->addr_length);
 627                 return;
 628         }
 629
 630         spin_lock(&card->local_addrs4_lock);
 631         for (i = 0; i < cmd->count; i++) {
 632                 struct qeth_ipacmd_local_addr4 *addr = &cmd->addrs[i];
 633                 unsigned int key = ipv4_addr_hash(addr->addr);
 634                 struct qeth_local_addr *tmp;
 635
 636                 hash_for_each_possible(card->local_addrs4, tmp, hnode, key) {
 637                         if (tmp->addr.s6_addr32[3] == addr->addr) {
 638                                 hash_del_rcu(&tmp->hnode);
 639                                 kfree_rcu(tmp, rcu);
 640                                 break;
 641                         }
 642                 }
 643         }
 644         spin_unlock(&card->local_addrs4_lock);
 645 }
 646
 647 static void qeth_del_local_addrs6(struct qeth_card *card,
 648                                   struct qeth_ipacmd_local_addrs6 *cmd)
 649 {
 650         unsigned int i;
 651
 652         if (cmd->addr_length !=
 653             sizeof_field(struct qeth_ipacmd_local_addr6, addr)) {
 654                 dev_err_ratelimited(&card->gdev->dev,
 655                                     "Dropped IPv6 DEL LOCAL ADDR event with bad length %u\n",
 656                                     cmd->addr_length);
 657                 return;
 658         }
 659
 660         spin_lock(&card->local_addrs6_lock);
 661         for (i = 0; i < cmd->count; i++) {
 662                 struct qeth_ipacmd_local_addr6 *addr = &cmd->addrs[i];
 663                 u32 key = ipv6_addr_hash(&addr->addr);
 664                 struct qeth_local_addr *tmp;
 665
 666                 hash_for_each_possible(card->local_addrs6, tmp, hnode, key) {
 667                         if (ipv6_addr_equal(&tmp->addr, &addr->addr)) {
 668                                 hash_del_rcu(&tmp->hnode);
 669                                 kfree_rcu(tmp, rcu);
 670                                 break;
 671                         }
 672                 }
 673         }
 674         spin_unlock(&card->local_addrs6_lock);
 675 }
 676
 677 static bool qeth_next_hop_is_local_v4(struct qeth_card *card,
 678                                       struct sk_buff *skb)
 679 {
 680         struct qeth_local_addr *tmp;
 681         bool is_local = false;
 682         unsigned int key;
 683         __be32 next_hop;
 684
 685         if (hash_empty(card->local_addrs4))
 686                 return false;
 687
 688         rcu_read_lock();
 689         next_hop = qeth_next_hop_v4_rcu(skb,
 690                                         qeth_dst_check_rcu(skb, htons(ETH_P_IP)));
 691         key = ipv4_addr_hash(next_hop);
 692
 693         hash_for_each_possible_rcu(card->local_addrs4, tmp, hnode, key) {
 694                 if (tmp->addr.s6_addr32[3] == next_hop) {
 695                         is_local = true;
 696                         break;
 697                 }
 698         }
 699         rcu_read_unlock();
 700
 701         return is_local;
 702 }
 703
 704 static bool qeth_next_hop_is_local_v6(struct qeth_card *card,
 705                                       struct sk_buff *skb)
 706 {
 707         struct qeth_local_addr *tmp;
 708         struct in6_addr *next_hop;
 709         bool is_local = false;
 710         u32 key;
 711
 712         if (hash_empty(card->local_addrs6))
 713                 return false;
 714
 715         rcu_read_lock();
 716         next_hop = qeth_next_hop_v6_rcu(skb,
 717                                         qeth_dst_check_rcu(skb, htons(ETH_P_IPV6)));
 718         key = ipv6_addr_hash(next_hop);
 719
 720         hash_for_each_possible_rcu(card->local_addrs6, tmp, hnode, key) {
 721                 if (ipv6_addr_equal(&tmp->addr, next_hop)) {
 722                         is_local = true;
 723                         break;
 724                 }
 725         }
 726         rcu_read_unlock();
 727
 728         return is_local;
 729 }
 730
 731 static int qeth_debugfs_local_addr_show(struct seq_file *m, void *v)
 732 {
 733         struct qeth_card *card = m->private;
 734         struct qeth_local_addr *tmp;
 735         unsigned int i;
 736
 737         rcu_read_lock();
 738         hash_for_each_rcu(card->local_addrs4, i, tmp, hnode)
 739                 seq_printf(m, "%pI4\n", &tmp->addr.s6_addr32[3]);
 740         hash_for_each_rcu(card->local_addrs6, i, tmp, hnode)
 741                 seq_printf(m, "%pI6c\n", &tmp->addr);
 742         rcu_read_unlock();
 743
 744         return 0;
 745 }
 746
 747 DEFINE_SHOW_ATTRIBUTE(qeth_debugfs_local_addr);
 748
 749 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 750                 struct qeth_card *card)
 751 {
 752         const char *ipa_name;
 753         int com = cmd->hdr.command;
 754
 755         ipa_name = qeth_get_ipa_cmd_name(com);
 756
 757         if (rc)
 758                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 759                                  ipa_name, com, CARD_DEVID(card), rc,
 760                                  qeth_get_ipa_msg(rc));
 761         else
 762                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 763                                  ipa_name, com, CARD_DEVID(card));
 764 }
 765
 766 static void qeth_default_link_info(struct qeth_card *card)
 767 {
 768         struct qeth_link_info *link_info = &card->info.link_info;
 769
 770         QETH_CARD_TEXT(card, 2, "dftlinfo");
 771         link_info->duplex = DUPLEX_FULL;
 772
 773         if (IS_IQD(card) || IS_VM_NIC(card)) {
 774                 link_info->speed = SPEED_10000;
 775                 link_info->port = PORT_FIBRE;
 776                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
 777         } else {
 778                 switch (card->info.link_type) {
 779                 case QETH_LINK_TYPE_FAST_ETH:
 780                 case QETH_LINK_TYPE_LANE_ETH100:
 781                         link_info->speed = SPEED_100;
 782                         link_info->port = PORT_TP;
 783                         break;
 784                 case QETH_LINK_TYPE_GBIT_ETH:
 785                 case QETH_LINK_TYPE_LANE_ETH1000:
 786                         link_info->speed = SPEED_1000;
 787                         link_info->port = PORT_FIBRE;
 788                         break;
 789                 case QETH_LINK_TYPE_10GBIT_ETH:
 790                         link_info->speed = SPEED_10000;
 791                         link_info->port = PORT_FIBRE;
 792                         break;
 793                 case QETH_LINK_TYPE_25GBIT_ETH:
 794                         link_info->speed = SPEED_25000;
 795                         link_info->port = PORT_FIBRE;
 796                         break;
 797                 default:
 798                         dev_info(&card->gdev->dev,
 799                                  "Unknown link type %x\n",
 800                                  card->info.link_type);
 801                         link_info->speed = SPEED_UNKNOWN;
 802                         link_info->port = PORT_OTHER;
 803                 }
 804
 805                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
 806         }
 807 }
 808
 809 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 810                                                 struct qeth_ipa_cmd *cmd)
 811 {
 812         QETH_CARD_TEXT(card, 5, "chkipad");
 813
 814         if (IS_IPA_REPLY(cmd)) {
 815                 if (cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 816                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 817                 return cmd;
 818         }
 819
 820         /* handle unsolicited event: */
 821         switch (cmd->hdr.command) {
 822         case IPA_CMD_STOPLAN:
 823                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 824                         dev_err(&card->gdev->dev,
 825                                 "Adjacent port of interface %s is no longer in reflective relay mode, trigger recovery\n",
 826                                 netdev_name(card->dev));
 827                         /* Set offline, then probably fail to set online: */
 828                         qeth_schedule_recovery(card);
 829                 } else {
 830                         /* stay online for subsequent STARTLAN */
 831                         dev_warn(&card->gdev->dev,
 832                                  "The link for interface %s on CHPID 0x%X failed\n",
 833                                  netdev_name(card->dev), card->info.chpid);
 834                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 835                         netif_carrier_off(card->dev);
 836                         qeth_default_link_info(card);
 837                 }
 838                 return NULL;
 839         case IPA_CMD_STARTLAN:
 840                 dev_info(&card->gdev->dev,
 841                          "The link for %s on CHPID 0x%X has been restored\n",
 842                          netdev_name(card->dev), card->info.chpid);
 843                 if (card->info.hwtrap)
 844                         card->info.hwtrap = 2;
 845                 qeth_schedule_recovery(card);
 846                 return NULL;
 847         case IPA_CMD_SETBRIDGEPORT_IQD:
 848         case IPA_CMD_SETBRIDGEPORT_OSA:
 849         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 850                 if (card->discipline->control_event_handler(card, cmd))
 851                         return cmd;
 852                 return NULL;
 853         case IPA_CMD_REGISTER_LOCAL_ADDR:
 854                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 855                         qeth_add_local_addrs4(card, &cmd->data.local_addrs4);
 856                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 857                         qeth_add_local_addrs6(card, &cmd->data.local_addrs6);
 858
 859                 QETH_CARD_TEXT(card, 3, "irla");
 860                 return NULL;
 861         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 862                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
 863                         qeth_del_local_addrs4(card, &cmd->data.local_addrs4);
 864                 else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
 865                         qeth_del_local_addrs6(card, &cmd->data.local_addrs6);
 866
 867                 QETH_CARD_TEXT(card, 3, "urla");
 868                 return NULL;
 869         default:
 870                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 871                 return cmd;
 872         }
 873 }
 874
 875 static void qeth_clear_ipacmd_list(struct qeth_card *card)
 876 {
 877         struct qeth_cmd_buffer *iob;
 878         unsigned long flags;
 879
 880         QETH_CARD_TEXT(card, 4, "clipalst");
 881
 882         spin_lock_irqsave(&card->lock, flags);
 883         list_for_each_entry(iob, &card->cmd_waiter_list, list_entry)
 884                 qeth_notify_cmd(iob, -ECANCELED);
 885         spin_unlock_irqrestore(&card->lock, flags);
 886 }
 887
 888 static int qeth_check_idx_response(struct qeth_card *card,
 889         unsigned char *buffer)
 890 {
 891         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 892         if ((buffer[2] & QETH_IDX_TERMINATE_MASK) == QETH_IDX_TERMINATE) {
 893                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 894                                  buffer[4]);
 895                 QETH_CARD_TEXT(card, 2, "ckidxres");
 896                 QETH_CARD_TEXT(card, 2, " idxterm");
 897                 QETH_CARD_TEXT_(card, 2, "rc%x", buffer[4]);
 898                 if (buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT ||
 899                     buffer[4] == QETH_IDX_TERM_BAD_TRANSPORT_VM) {
 900                         dev_err(&card->gdev->dev,
 901                                 "The device does not support the configured transport mode\n");
 902                         return -EPROTONOSUPPORT;
 903                 }
 904                 return -EIO;
 905         }
 906         return 0;
 907 }
 908
 909 static void qeth_release_buffer_cb(struct qeth_card *card,
 910                                    struct qeth_cmd_buffer *iob,
 911                                    unsigned int data_length)
 912 {
 913         qeth_put_cmd(iob);
 914 }
 915
 916 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 917 {
 918         qeth_notify_cmd(iob, rc);
 919         qeth_put_cmd(iob);
 920 }
 921
 922 static struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 923                                               unsigned int length,
 924                                               unsigned int ccws, long timeout)
 925 {
 926         struct qeth_cmd_buffer *iob;
 927
 928         if (length > QETH_BUFSIZE)
 929                 return NULL;
 930
 931         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 932         if (!iob)
 933                 return NULL;
 934
 935         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 936                             GFP_KERNEL | GFP_DMA);
 937         if (!iob->data) {
 938                 kfree(iob);
 939                 return NULL;
 940         }
 941
 942         init_completion(&iob->done);
 943         spin_lock_init(&iob->lock);
 944         refcount_set(&iob->ref_count, 1);
 945         iob->channel = channel;
 946         iob->timeout = timeout;
 947         iob->length = length;
 948         return iob;
 949 }
 950
 951 static void qeth_issue_next_read_cb(struct qeth_card *card,
 952                                     struct qeth_cmd_buffer *iob,
 953                                     unsigned int data_length)
 954 {
 955         struct qeth_cmd_buffer *request = NULL;
 956         struct qeth_ipa_cmd *cmd = NULL;
 957         struct qeth_reply *reply = NULL;
 958         struct qeth_cmd_buffer *tmp;
 959         unsigned long flags;
 960         int rc = 0;
 961
 962         QETH_CARD_TEXT(card, 4, "sndctlcb");
 963         rc = qeth_check_idx_response(card, iob->data);
 964         switch (rc) {
 965         case 0:
 966                 break;
 967         case -EIO:
 968                 qeth_schedule_recovery(card);
 969                 fallthrough;
 970         default:
 971                 qeth_clear_ipacmd_list(card);
 972                 goto err_idx;
 973         }
 974
 975         cmd = __ipa_reply(iob);
 976         if (cmd) {
 977                 cmd = qeth_check_ipa_data(card, cmd);
 978                 if (!cmd)
 979                         goto out;
 980         }
 981
 982         /* match against pending cmd requests */
 983         spin_lock_irqsave(&card->lock, flags);
 984         list_for_each_entry(tmp, &card->cmd_waiter_list, list_entry) {
 985                 if (tmp->match && tmp->match(tmp, iob)) {
 986                         request = tmp;
 987                         /* take the object outside the lock */
 988                         qeth_get_cmd(request);
 989                         break;
 990                 }
 991         }
 992         spin_unlock_irqrestore(&card->lock, flags);
 993
 994         if (!request)
 995                 goto out;
 996
 997         reply = &request->reply;
 998         if (!reply->callback) {
 999                 rc = 0;
1000                 goto no_callback;
1001         }
1002
1003         spin_lock_irqsave(&request->lock, flags);
1004         if (request->rc)
1005                 /* Bail out when the requestor has already left: */
1006                 rc = request->rc;
1007         else
1008                 rc = reply->callback(card, reply, cmd ? (unsigned long)cmd :
1009                                                         (unsigned long)iob);
1010         spin_unlock_irqrestore(&request->lock, flags);
1011
1012 no_callback:
1013         if (rc <= 0)
1014                 qeth_notify_cmd(request, rc);
1015         qeth_put_cmd(request);
1016 out:
1017         memcpy(&card->seqno.pdu_hdr_ack,
1018                 QETH_PDU_HEADER_SEQ_NO(iob->data),
1019                 QETH_SEQ_NO_LENGTH);
1020         __qeth_issue_next_read(card);
1021 err_idx:
1022         qeth_put_cmd(iob);
1023 }
1024
1025 static int qeth_set_thread_start_bit(struct qeth_card *card,
1026                 unsigned long thread)
1027 {
1028         unsigned long flags;
1029         int rc = 0;
1030
1031         spin_lock_irqsave(&card->thread_mask_lock, flags);
1032         if (!(card->thread_allowed_mask & thread))
1033                 rc = -EPERM;
1034         else if (card->thread_start_mask & thread)
1035                 rc = -EBUSY;
1036         else
1037                 card->thread_start_mask |= thread;
1038         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1039
1040         return rc;
1041 }
1042
1043 static void qeth_clear_thread_start_bit(struct qeth_card *card,
1044                                         unsigned long thread)
1045 {
1046         unsigned long flags;
1047
1048         spin_lock_irqsave(&card->thread_mask_lock, flags);
1049         card->thread_start_mask &= ~thread;
1050         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1051         wake_up(&card->wait_q);
1052 }
1053
1054 static void qeth_clear_thread_running_bit(struct qeth_card *card,
1055                                           unsigned long thread)
1056 {
1057         unsigned long flags;
1058
1059         spin_lock_irqsave(&card->thread_mask_lock, flags);
1060         card->thread_running_mask &= ~thread;
1061         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1062         wake_up_all(&card->wait_q);
1063 }
1064
1065 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1066 {
1067         unsigned long flags;
1068         int rc = 0;
1069
1070         spin_lock_irqsave(&card->thread_mask_lock, flags);
1071         if (card->thread_start_mask & thread) {
1072                 if ((card->thread_allowed_mask & thread) &&
1073                     !(card->thread_running_mask & thread)) {
1074                         rc = 1;
1075                         card->thread_start_mask &= ~thread;
1076                         card->thread_running_mask |= thread;
1077                 } else
1078                         rc = -EPERM;
1079         }
1080         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1081         return rc;
1082 }
1083
1084 static int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
1085 {
1086         int rc = 0;
1087
1088         wait_event(card->wait_q,
1089                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
1090         return rc;
1091 }
1092
1093 int qeth_schedule_recovery(struct qeth_card *card)
1094 {
1095         int rc;
1096
1097         QETH_CARD_TEXT(card, 2, "startrec");
1098
1099         rc = qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD);
1100         if (!rc)
1101                 schedule_work(&card->kernel_thread_starter);
1102
1103         return rc;
1104 }
1105
1106 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
1107                             struct irb *irb)
1108 {
1109         int dstat, cstat;
1110         char *sense;
1111
1112         sense = (char *) irb->ecw;
1113         cstat = irb->scsw.cmd.cstat;
1114         dstat = irb->scsw.cmd.dstat;
1115
1116         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
1117                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
1118                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
1119                 QETH_CARD_TEXT(card, 2, "CGENCHK");
1120                 dev_warn(&cdev->dev, "The qeth device driver "
1121                         "failed to recover an error on the device\n");
1122                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
1123                                  CCW_DEVID(cdev), dstat, cstat);
1124                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
1125                                 16, 1, irb, 64, 1);
1126                 return -EIO;
1127         }
1128
1129         if (dstat & DEV_STAT_UNIT_CHECK) {
1130                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
1131                     SENSE_RESETTING_EVENT_FLAG) {
1132                         QETH_CARD_TEXT(card, 2, "REVIND");
1133                         return -EIO;
1134                 }
1135                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
1136                     SENSE_COMMAND_REJECT_FLAG) {
1137                         QETH_CARD_TEXT(card, 2, "CMDREJi");
1138                         return -EIO;
1139                 }
1140                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
1141                         QETH_CARD_TEXT(card, 2, "AFFE");
1142                         return -EIO;
1143                 }
1144                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
1145                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
1146                         return 0;
1147                 }
1148                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1149                 return -EIO;
1150         }
1151         return 0;
1152 }
1153
1154 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
1155                                 struct irb *irb)
1156 {
1157         if (!IS_ERR(irb))
1158                 return 0;
1159
1160         switch (PTR_ERR(irb)) {
1161         case -EIO:
1162                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1163                                  CCW_DEVID(cdev));
1164                 QETH_CARD_TEXT(card, 2, "ckirberr");
1165                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1166                 return -EIO;
1167         case -ETIMEDOUT:
1168                 dev_warn(&cdev->dev, "A hardware operation timed out"
1169                         " on the device\n");
1170                 QETH_CARD_TEXT(card, 2, "ckirberr");
1171                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1172                 return -ETIMEDOUT;
1173         default:
1174                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1175                                  PTR_ERR(irb), CCW_DEVID(cdev));
1176                 QETH_CARD_TEXT(card, 2, "ckirberr");
1177                 QETH_CARD_TEXT(card, 2, "  rc???");
1178                 return PTR_ERR(irb);
1179         }
1180 }
1181
1182 /**
1183  * qeth_irq() - qeth interrupt handler
1184  * @cdev: ccw device
1185  * @intparm: expect pointer to iob
1186  * @irb: Interruption Response Block
1187  *
1188  * In the good path:
1189  * corresponding qeth channel is locked with last used iob as active_cmd.
1190  * But this function is also called for error interrupts.
1191  *
1192  * Caller ensures that:
1193  * Interrupts are disabled; ccw device lock is held;
1194  *
1195  */
1196 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1197                 struct irb *irb)
1198 {
1199         int rc;
1200         int cstat, dstat;
1201         struct qeth_cmd_buffer *iob = NULL;
1202         struct ccwgroup_device *gdev;
1203         struct qeth_channel *channel;
1204         struct qeth_card *card;
1205
1206         /* while we hold the ccwdev lock, this stays valid: */
1207         gdev = dev_get_drvdata(&cdev->dev);
1208         card = dev_get_drvdata(&gdev->dev);
1209
1210         QETH_CARD_TEXT(card, 5, "irq");
1211
1212         if (card->read.ccwdev == cdev) {
1213                 channel = &card->read;
1214                 QETH_CARD_TEXT(card, 5, "read");
1215         } else if (card->write.ccwdev == cdev) {
1216                 channel = &card->write;
1217                 QETH_CARD_TEXT(card, 5, "write");
1218         } else {
1219                 channel = &card->data;
1220                 QETH_CARD_TEXT(card, 5, "data");
1221         }
1222
1223         if (intparm == 0) {
1224                 QETH_CARD_TEXT(card, 5, "irqunsol");
1225         } else if ((addr_t)intparm != (addr_t)channel->active_cmd) {
1226                 QETH_CARD_TEXT(card, 5, "irqunexp");
1227
1228                 dev_err(&cdev->dev,
1229                         "Received IRQ with intparm %lx, expected %px\n",
1230                         intparm, channel->active_cmd);
1231                 if (channel->active_cmd)
1232                         qeth_cancel_cmd(channel->active_cmd, -EIO);
1233         } else {
1234                 iob = (struct qeth_cmd_buffer *) (addr_t)intparm;
1235         }
1236
1237         rc = qeth_check_irb_error(card, cdev, irb);
1238         if (rc) {
1239                 /* IO was terminated, free its resources. */
1240                 qeth_unlock_channel(card, channel);
1241                 if (iob)
1242                         qeth_cancel_cmd(iob, rc);
1243                 return;
1244         }
1245
1246         if (irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
1247                 channel->state = CH_STATE_STOPPED;
1248                 wake_up(&card->wait_q);
1249         }
1250
1251         if (irb->scsw.cmd.fctl & SCSW_FCTL_HALT_FUNC) {
1252                 channel->state = CH_STATE_HALTED;
1253                 wake_up(&card->wait_q);
1254         }
1255
1256         if (iob && (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC |
1257                                           SCSW_FCTL_HALT_FUNC))) {
1258                 qeth_cancel_cmd(iob, -ECANCELED);
1259                 iob = NULL;
1260         }
1261
1262         cstat = irb->scsw.cmd.cstat;
1263         dstat = irb->scsw.cmd.dstat;
1264
1265         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1266             (dstat & DEV_STAT_UNIT_CHECK) ||
1267             (cstat)) {
1268                 if (irb->esw.esw0.erw.cons) {
1269                         dev_warn(&channel->ccwdev->dev,
1270                                 "The qeth device driver failed to recover "
1271                                 "an error on the device\n");
1272                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1273                                          CCW_DEVID(channel->ccwdev), cstat,
1274                                          dstat);
1275                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1276                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1277                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1278                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1279                 }
1280
1281                 rc = qeth_get_problem(card, cdev, irb);
1282                 if (rc) {
1283                         card->read_or_write_problem = 1;
1284                         qeth_unlock_channel(card, channel);
1285                         if (iob)
1286                                 qeth_cancel_cmd(iob, rc);
1287                         qeth_clear_ipacmd_list(card);
1288                         qeth_schedule_recovery(card);
1289                         return;
1290                 }
1291         }
1292
1293         if (scsw_cmd_is_valid_cc(&irb->scsw) && irb->scsw.cmd.cc == 1 && iob) {
1294                 /* channel command hasn't started: retry.
1295                  * active_cmd is still set to last iob
1296                  */
1297                 QETH_CARD_TEXT(card, 2, "irqcc1");
1298                 rc = ccw_device_start_timeout(cdev, __ccw_from_cmd(iob),
1299                                               (addr_t)iob, 0, 0, iob->timeout);
1300                 if (rc) {
1301                         QETH_DBF_MESSAGE(2,
1302                                          "ccw retry on %x failed, rc = %i\n",
1303                                          CARD_DEVID(card), rc);
1304                         QETH_CARD_TEXT_(card, 2, " err%d", rc);
1305                         qeth_unlock_channel(card, channel);
1306                         qeth_cancel_cmd(iob, rc);
1307                 }
1308                 return;
1309         }
1310
1311         qeth_unlock_channel(card, channel);
1312
1313         if (iob) {
1314                 /* sanity check: */
1315                 if (irb->scsw.cmd.count > iob->length) {
1316                         qeth_cancel_cmd(iob, -EIO);
1317                         return;
1318                 }
1319                 if (iob->callback)
1320                         iob->callback(card, iob,
1321                                       iob->length - irb->scsw.cmd.count);
1322         }
1323 }
1324
1325 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1326                 struct qeth_qdio_out_buffer *buf,
1327                 enum iucv_tx_notify notification)
1328 {
1329         struct sk_buff *skb;
1330
1331         skb_queue_walk(&buf->skb_list, skb) {
1332                 struct sock *sk = skb->sk;
1333
1334                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1335                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1336                 if (sk && sk->sk_family == PF_IUCV)
1337                         iucv_sk(sk)->sk_txnotify(sk, notification);
1338         }
1339 }
1340
1341 static void qeth_tx_complete_buf(struct qeth_qdio_out_q *queue,
1342                                  struct qeth_qdio_out_buffer *buf, bool error,
1343                                  int budget)
1344 {
1345         struct sk_buff *skb;
1346
1347         /* Empty buffer? */
1348         if (buf->next_element_to_fill == 0)
1349                 return;
1350
1351         QETH_TXQ_STAT_INC(queue, bufs);
1352         QETH_TXQ_STAT_ADD(queue, buf_elements, buf->next_element_to_fill);
1353         if (error) {
1354                 QETH_TXQ_STAT_ADD(queue, tx_errors, buf->frames);
1355         } else {
1356                 QETH_TXQ_STAT_ADD(queue, tx_packets, buf->frames);
1357                 QETH_TXQ_STAT_ADD(queue, tx_bytes, buf->bytes);
1358         }
1359
1360         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL) {
1361                 unsigned int bytes = qdisc_pkt_len(skb);
1362                 bool is_tso = skb_is_gso(skb);
1363                 unsigned int packets;
1364
1365                 packets = is_tso ? skb_shinfo(skb)->gso_segs : 1;
1366                 if (!error) {
1367                         if (skb->ip_summed == CHECKSUM_PARTIAL)
1368                                 QETH_TXQ_STAT_ADD(queue, skbs_csum, packets);
1369                         if (skb_is_nonlinear(skb))
1370                                 QETH_TXQ_STAT_INC(queue, skbs_sg);
1371                         if (is_tso) {
1372                                 QETH_TXQ_STAT_INC(queue, skbs_tso);
1373                                 QETH_TXQ_STAT_ADD(queue, tso_bytes, bytes);
1374                         }
1375                 }
1376
1377                 napi_consume_skb(skb, budget);
1378         }
1379 }
1380
1381 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1382                                      struct qeth_qdio_out_buffer *buf,
1383                                      bool error, int budget)
1384 {
1385         int i;
1386
1387         /* is PCI flag set on buffer? */
1388         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ) {
1389                 atomic_dec(&queue->set_pci_flags_count);
1390                 QETH_TXQ_STAT_INC(queue, completion_irq);
1391         }
1392
1393         qeth_tx_complete_buf(queue, buf, error, budget);
1394
1395         for (i = 0; i < queue->max_elements; ++i) {
1396                 void *data = dma64_to_virt(buf->buffer->element[i].addr);
1397
1398                 if (__test_and_clear_bit(i, buf->from_kmem_cache) && data)
1399                         kmem_cache_free(qeth_core_header_cache, data);
1400         }
1401
1402         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1403         buf->next_element_to_fill = 0;
1404         buf->frames = 0;
1405         buf->bytes = 0;
1406         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1407 }
1408
1409 static void qeth_free_out_buf(struct qeth_qdio_out_buffer *buf)
1410 {
1411         if (buf->aob)
1412                 kmem_cache_free(qeth_qaob_cache, buf->aob);
1413         kmem_cache_free(qeth_qdio_outbuf_cache, buf);
1414 }
1415
1416 static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
1417                                           struct qeth_qdio_out_q *queue,
1418                                           bool drain, int budget)
1419 {
1420         struct qeth_qdio_out_buffer *buf, *tmp;
1421
1422         list_for_each_entry_safe(buf, tmp, &queue->pending_bufs, list_entry) {
1423                 struct qeth_qaob_priv1 *priv;
1424                 struct qaob *aob = buf->aob;
1425                 enum iucv_tx_notify notify;
1426                 unsigned int i;
1427
1428                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
1429                 if (drain || READ_ONCE(priv->state) == QETH_QAOB_DONE) {
1430                         QETH_CARD_TEXT(card, 5, "fp");
1431                         QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
1432
1433                         notify = drain ? TX_NOTIFY_GENERALERROR :
1434                                          qeth_compute_cq_notification(aob->aorc, 1);
1435                         qeth_notify_skbs(queue, buf, notify);
1436                         qeth_tx_complete_buf(queue, buf, drain, budget);
1437
1438                         for (i = 0;
1439                              i < aob->sb_count && i < queue->max_elements;
1440                              i++) {
1441                                 void *data = dma64_to_virt(aob->sba[i]);
1442
1443                                 if (test_bit(i, buf->from_kmem_cache) && data)
1444                                         kmem_cache_free(qeth_core_header_cache,
1445                                                         data);
1446                         }
1447
1448                         list_del(&buf->list_entry);
1449                         qeth_free_out_buf(buf);
1450                 }
1451         }
1452 }
1453
1454 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1455 {
1456         int j;
1457
1458         qeth_tx_complete_pending_bufs(q->card, q, true, 0);
1459
1460         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1461                 if (!q->bufs[j])
1462                         continue;
1463
1464                 qeth_clear_output_buffer(q, q->bufs[j], true, 0);
1465                 if (free) {
1466                         qeth_free_out_buf(q->bufs[j]);
1467                         q->bufs[j] = NULL;
1468                 }
1469         }
1470 }
1471
1472 static void qeth_drain_output_queues(struct qeth_card *card)
1473 {
1474         int i;
1475
1476         QETH_CARD_TEXT(card, 2, "clearqdbf");
1477         /* clear outbound buffers to free skbs */
1478         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1479                 if (card->qdio.out_qs[i])
1480                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1481         }
1482 }
1483
1484 static void qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1485 {
1486         unsigned int max = single ? 1 : card->dev->num_tx_queues;
1487
1488         if (card->qdio.no_out_queues == max)
1489                 return;
1490
1491         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1492                 qeth_free_qdio_queues(card);
1493
1494         if (max == 1 && card->qdio.do_prio_queueing != QETH_PRIOQ_DEFAULT)
1495                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1496
1497         card->qdio.no_out_queues = max;
1498 }
1499
1500 static int qeth_update_from_chp_desc(struct qeth_card *card)
1501 {
1502         struct ccw_device *ccwdev;
1503         struct channel_path_desc_fmt0 *chp_dsc;
1504
1505         QETH_CARD_TEXT(card, 2, "chp_desc");
1506
1507         ccwdev = card->data.ccwdev;
1508         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1509         if (!chp_dsc)
1510                 return -ENOMEM;
1511
1512         card->info.func_level = 0x4100 + chp_dsc->desc;
1513
1514         if (IS_OSD(card) || IS_OSX(card))
1515                 /* CHPP field bit 6 == 1 -> single queue */
1516                 qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1517
1518         kfree(chp_dsc);
1519         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1520         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1521         return 0;
1522 }
1523
1524 static void qeth_init_qdio_info(struct qeth_card *card)
1525 {
1526         QETH_CARD_TEXT(card, 4, "intqdinf");
1527         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1528         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1529         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1530
1531         /* inbound */
1532         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1533         if (IS_IQD(card))
1534                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1535         else
1536                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1537         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1538         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1539         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1540 }
1541
1542 static void qeth_set_initial_options(struct qeth_card *card)
1543 {
1544         card->options.route4.type = NO_ROUTER;
1545         card->options.route6.type = NO_ROUTER;
1546         card->options.isolation = ISOLATION_MODE_NONE;
1547         card->options.cq = QETH_CQ_DISABLED;
1548         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1549 }
1550
1551 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1552 {
1553         unsigned long flags;
1554         int rc = 0;
1555
1556         spin_lock_irqsave(&card->thread_mask_lock, flags);
1557         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1558                         (u8) card->thread_start_mask,
1559                         (u8) card->thread_allowed_mask,
1560                         (u8) card->thread_running_mask);
1561         rc = (card->thread_start_mask & thread);
1562         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1563         return rc;
1564 }
1565
1566 static int qeth_do_reset(void *data);
1567 static void qeth_start_kernel_thread(struct work_struct *work)
1568 {
1569         struct task_struct *ts;
1570         struct qeth_card *card = container_of(work, struct qeth_card,
1571                                         kernel_thread_starter);
1572         QETH_CARD_TEXT(card, 2, "strthrd");
1573
1574         if (card->read.state != CH_STATE_UP &&
1575             card->write.state != CH_STATE_UP)
1576                 return;
1577         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1578                 ts = kthread_run(qeth_do_reset, card, "qeth_recover");
1579                 if (IS_ERR(ts)) {
1580                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1581                         qeth_clear_thread_running_bit(card,
1582                                 QETH_RECOVER_THREAD);
1583                 }
1584         }
1585 }
1586
1587 static void qeth_buffer_reclaim_work(struct work_struct *);
1588 static void qeth_setup_card(struct qeth_card *card)
1589 {
1590         QETH_CARD_TEXT(card, 2, "setupcrd");
1591
1592         card->info.type = CARD_RDEV(card)->id.driver_info;
1593         card->state = CARD_STATE_DOWN;
1594         spin_lock_init(&card->lock);
1595         spin_lock_init(&card->thread_mask_lock);
1596         mutex_init(&card->conf_mutex);
1597         mutex_init(&card->discipline_mutex);
1598         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1599         INIT_LIST_HEAD(&card->cmd_waiter_list);
1600         init_waitqueue_head(&card->wait_q);
1601         qeth_set_initial_options(card);
1602         /* IP address takeover */
1603         INIT_LIST_HEAD(&card->ipato.entries);
1604         qeth_init_qdio_info(card);
1605         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1606         hash_init(card->rx_mode_addrs);
1607         hash_init(card->local_addrs4);
1608         hash_init(card->local_addrs6);
1609         spin_lock_init(&card->local_addrs4_lock);
1610         spin_lock_init(&card->local_addrs6_lock);
1611 }
1612
1613 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1614 {
1615         struct qeth_card *card = container_of(slr, struct qeth_card,
1616                                         qeth_service_level);
1617         if (card->info.mcl_level[0])
1618                 seq_printf(m, "qeth: %s firmware level %s\n",
1619                         CARD_BUS_ID(card), card->info.mcl_level);
1620 }
1621
1622 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1623 {
1624         struct qeth_card *card;
1625
1626         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1627         card = kzalloc(sizeof(*card), GFP_KERNEL);
1628         if (!card)
1629                 goto out;
1630         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1631
1632         card->gdev = gdev;
1633         dev_set_drvdata(&gdev->dev, card);
1634         CARD_RDEV(card) = gdev->cdev[0];
1635         CARD_WDEV(card) = gdev->cdev[1];
1636         CARD_DDEV(card) = gdev->cdev[2];
1637
1638         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1639                                                  dev_name(&gdev->dev));
1640         if (!card->event_wq)
1641                 goto out_wq;
1642
1643         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1644         if (!card->read_cmd)
1645                 goto out_read_cmd;
1646
1647         card->debugfs = debugfs_create_dir(dev_name(&gdev->dev),
1648                                            qeth_debugfs_root);
1649         debugfs_create_file("local_addrs", 0400, card->debugfs, card,
1650                             &qeth_debugfs_local_addr_fops);
1651
1652         card->qeth_service_level.seq_print = qeth_core_sl_print;
1653         register_service_level(&card->qeth_service_level);
1654         return card;
1655
1656 out_read_cmd:
1657         destroy_workqueue(card->event_wq);
1658 out_wq:
1659         dev_set_drvdata(&gdev->dev, NULL);
1660         kfree(card);
1661 out:
1662         return NULL;
1663 }
1664
1665 static int qeth_clear_channel(struct qeth_card *card,
1666                               struct qeth_channel *channel)
1667 {
1668         int rc;
1669
1670         QETH_CARD_TEXT(card, 3, "clearch");
1671         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1672         rc = ccw_device_clear(channel->ccwdev, (addr_t)channel->active_cmd);
1673         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1674
1675         if (rc)
1676                 return rc;
1677         rc = wait_event_interruptible_timeout(card->wait_q,
1678                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1679         if (rc == -ERESTARTSYS)
1680                 return rc;
1681         if (channel->state != CH_STATE_STOPPED)
1682                 return -ETIME;
1683         channel->state = CH_STATE_DOWN;
1684         return 0;
1685 }
1686
1687 static int qeth_halt_channel(struct qeth_card *card,
1688                              struct qeth_channel *channel)
1689 {
1690         int rc;
1691
1692         QETH_CARD_TEXT(card, 3, "haltch");
1693         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1694         rc = ccw_device_halt(channel->ccwdev, (addr_t)channel->active_cmd);
1695         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1696
1697         if (rc)
1698                 return rc;
1699         rc = wait_event_interruptible_timeout(card->wait_q,
1700                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1701         if (rc == -ERESTARTSYS)
1702                 return rc;
1703         if (channel->state != CH_STATE_HALTED)
1704                 return -ETIME;
1705         return 0;
1706 }
1707
1708 static int qeth_stop_channel(struct qeth_channel *channel)
1709 {
1710         struct ccw_device *cdev = channel->ccwdev;
1711         int rc;
1712
1713         rc = ccw_device_set_offline(cdev);
1714
1715         spin_lock_irq(get_ccwdev_lock(cdev));
1716         if (channel->active_cmd)
1717                 dev_err(&cdev->dev, "Stopped channel while cmd %px was still active\n",
1718                         channel->active_cmd);
1719
1720         cdev->handler = NULL;
1721         spin_unlock_irq(get_ccwdev_lock(cdev));
1722
1723         return rc;
1724 }
1725
1726 static int qeth_start_channel(struct qeth_channel *channel)
1727 {
1728         struct ccw_device *cdev = channel->ccwdev;
1729         int rc;
1730
1731         channel->state = CH_STATE_DOWN;
1732         xchg(&channel->active_cmd, NULL);
1733
1734         spin_lock_irq(get_ccwdev_lock(cdev));
1735         cdev->handler = qeth_irq;
1736         spin_unlock_irq(get_ccwdev_lock(cdev));
1737
1738         rc = ccw_device_set_online(cdev);
1739         if (rc)
1740                 goto err;
1741
1742         return 0;
1743
1744 err:
1745         spin_lock_irq(get_ccwdev_lock(cdev));
1746         cdev->handler = NULL;
1747         spin_unlock_irq(get_ccwdev_lock(cdev));
1748         return rc;
1749 }
1750
1751 static int qeth_halt_channels(struct qeth_card *card)
1752 {
1753         int rc1 = 0, rc2 = 0, rc3 = 0;
1754
1755         QETH_CARD_TEXT(card, 3, "haltchs");
1756         rc1 = qeth_halt_channel(card, &card->read);
1757         rc2 = qeth_halt_channel(card, &card->write);
1758         rc3 = qeth_halt_channel(card, &card->data);
1759         if (rc1)
1760                 return rc1;
1761         if (rc2)
1762                 return rc2;
1763         return rc3;
1764 }
1765
1766 static int qeth_clear_channels(struct qeth_card *card)
1767 {
1768         int rc1 = 0, rc2 = 0, rc3 = 0;
1769
1770         QETH_CARD_TEXT(card, 3, "clearchs");
1771         rc1 = qeth_clear_channel(card, &card->read);
1772         rc2 = qeth_clear_channel(card, &card->write);
1773         rc3 = qeth_clear_channel(card, &card->data);
1774         if (rc1)
1775                 return rc1;
1776         if (rc2)
1777                 return rc2;
1778         return rc3;
1779 }
1780
1781 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1782 {
1783         int rc = 0;
1784
1785         QETH_CARD_TEXT(card, 3, "clhacrd");
1786
1787         if (halt)
1788                 rc = qeth_halt_channels(card);
1789         if (rc)
1790                 return rc;
1791         return qeth_clear_channels(card);
1792 }
1793
1794 static int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1795 {
1796         int rc = 0;
1797
1798         QETH_CARD_TEXT(card, 3, "qdioclr");
1799         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1800                 QETH_QDIO_CLEANING)) {
1801         case QETH_QDIO_ESTABLISHED:
1802                 if (IS_IQD(card))
1803                         rc = qdio_shutdown(CARD_DDEV(card),
1804                                 QDIO_FLAG_CLEANUP_USING_HALT);
1805                 else
1806                         rc = qdio_shutdown(CARD_DDEV(card),
1807                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1808                 if (rc)
1809                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1810                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1811                 break;
1812         case QETH_QDIO_CLEANING:
1813                 return rc;
1814         default:
1815                 break;
1816         }
1817         rc = qeth_clear_halt_card(card, use_halt);
1818         if (rc)
1819                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1820         return rc;
1821 }
1822
1823 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1824 {
1825         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1826         struct diag26c_vnic_resp *response = NULL;
1827         struct diag26c_vnic_req *request = NULL;
1828         struct ccw_dev_id id;
1829         char userid[80];
1830         int rc = 0;
1831
1832         QETH_CARD_TEXT(card, 2, "vmlayer");
1833
1834         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1835         if (rc)
1836                 goto out;
1837
1838         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1839         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1840         if (!request || !response) {
1841                 rc = -ENOMEM;
1842                 goto out;
1843         }
1844
1845         ccw_device_get_id(CARD_RDEV(card), &id);
1846         request->resp_buf_len = sizeof(*response);
1847         request->resp_version = DIAG26C_VERSION6_VM65918;
1848         request->req_format = DIAG26C_VNIC_INFO;
1849         ASCEBC(userid, 8);
1850         memcpy(&request->sys_name, userid, 8);
1851         request->devno = id.devno;
1852
1853         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1854         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1855         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1856         if (rc)
1857                 goto out;
1858         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1859
1860         if (request->resp_buf_len < sizeof(*response) ||
1861             response->version != request->resp_version) {
1862                 rc = -EIO;
1863                 goto out;
1864         }
1865
1866         if (response->protocol == VNIC_INFO_PROT_L2)
1867                 disc = QETH_DISCIPLINE_LAYER2;
1868         else if (response->protocol == VNIC_INFO_PROT_L3)
1869                 disc = QETH_DISCIPLINE_LAYER3;
1870
1871 out:
1872         kfree(response);
1873         kfree(request);
1874         if (rc)
1875                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1876         return disc;
1877 }
1878
1879 /* Determine whether the device requires a specific layer discipline */
1880 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1881 {
1882         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1883
1884         if (IS_OSM(card))
1885                 disc = QETH_DISCIPLINE_LAYER2;
1886         else if (IS_VM_NIC(card))
1887                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1888                                       qeth_vm_detect_layer(card);
1889
1890         switch (disc) {
1891         case QETH_DISCIPLINE_LAYER2:
1892                 QETH_CARD_TEXT(card, 3, "force l2");
1893                 break;
1894         case QETH_DISCIPLINE_LAYER3:
1895                 QETH_CARD_TEXT(card, 3, "force l3");
1896                 break;
1897         default:
1898                 QETH_CARD_TEXT(card, 3, "force no");
1899         }
1900
1901         return disc;
1902 }
1903
1904 static void qeth_set_blkt_defaults(struct qeth_card *card)
1905 {
1906         QETH_CARD_TEXT(card, 2, "cfgblkt");
1907
1908         if (card->info.use_v1_blkt) {
1909                 card->info.blkt.time_total = 0;
1910                 card->info.blkt.inter_packet = 0;
1911                 card->info.blkt.inter_packet_jumbo = 0;
1912         } else {
1913                 card->info.blkt.time_total = 250;
1914                 card->info.blkt.inter_packet = 5;
1915                 card->info.blkt.inter_packet_jumbo = 15;
1916         }
1917 }
1918
1919 static void qeth_idx_init(struct qeth_card *card)
1920 {
1921         memset(&card->seqno, 0, sizeof(card->seqno));
1922
1923         card->token.issuer_rm_w = 0x00010103UL;
1924         card->token.cm_filter_w = 0x00010108UL;
1925         card->token.cm_connection_w = 0x0001010aUL;
1926         card->token.ulp_filter_w = 0x0001010bUL;
1927         card->token.ulp_connection_w = 0x0001010dUL;
1928
1929         switch (card->info.type) {
1930         case QETH_CARD_TYPE_IQD:
1931                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1932                 break;
1933         case QETH_CARD_TYPE_OSD:
1934                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1935                 break;
1936         default:
1937                 break;
1938         }
1939 }
1940
1941 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1942                                   struct qeth_cmd_buffer *iob)
1943 {
1944         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1945                QETH_SEQ_NO_LENGTH);
1946         if (iob->channel == &card->write)
1947                 card->seqno.trans_hdr++;
1948 }
1949
1950 static int qeth_peer_func_level(int level)
1951 {
1952         if ((level & 0xff) == 8)
1953                 return (level & 0xff) + 0x400;
1954         if (((level >> 8) & 3) == 1)
1955                 return (level & 0xff) + 0x200;
1956         return level;
1957 }
1958
1959 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1960                                   struct qeth_cmd_buffer *iob)
1961 {
1962         qeth_idx_finalize_cmd(card, iob);
1963
1964         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1965                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1966         card->seqno.pdu_hdr++;
1967         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1968                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1969
1970         iob->callback = qeth_release_buffer_cb;
1971 }
1972
1973 static bool qeth_mpc_match_reply(struct qeth_cmd_buffer *iob,
1974                                  struct qeth_cmd_buffer *reply)
1975 {
1976         /* MPC cmds are issued strictly in sequence. */
1977         return !IS_IPA(reply->data);
1978 }
1979
1980 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1981                                                   const void *data,
1982                                                   unsigned int data_length)
1983 {
1984         struct qeth_cmd_buffer *iob;
1985
1986         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1987         if (!iob)
1988                 return NULL;
1989
1990         memcpy(iob->data, data, data_length);
1991         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1992                        iob->data);
1993         iob->finalize = qeth_mpc_finalize_cmd;
1994         iob->match = qeth_mpc_match_reply;
1995         return iob;
1996 }
1997
1998 /**
1999  * qeth_send_control_data() -   send control command to the card
2000  * @card:                       qeth_card structure pointer
2001  * @iob:                        qeth_cmd_buffer pointer
2002  * @reply_cb:                   callback function pointer
2003  *  cb_card:                    pointer to the qeth_card structure
2004  *  cb_reply:                   pointer to the qeth_reply structure
2005  *  cb_cmd:                     pointer to the original iob for non-IPA
2006  *                              commands, or to the qeth_ipa_cmd structure
2007  *                              for the IPA commands.
2008  * @reply_param:                private pointer passed to the callback
2009  *
2010  * Callback function gets called one or more times, with cb_cmd
2011  * pointing to the response returned by the hardware. Callback
2012  * function must return
2013  *   > 0 if more reply blocks are expected,
2014  *     0 if the last or only reply block is received, and
2015  *   < 0 on error.
2016  * Callback function can get the value of the reply_param pointer from the
2017  * field 'param' of the structure qeth_reply.
2018  */
2019
2020 static int qeth_send_control_data(struct qeth_card *card,
2021                                   struct qeth_cmd_buffer *iob,
2022                                   int (*reply_cb)(struct qeth_card *cb_card,
2023                                                   struct qeth_reply *cb_reply,
2024                                                   unsigned long cb_cmd),
2025                                   void *reply_param)
2026 {
2027         struct qeth_channel *channel = iob->channel;
2028         struct qeth_reply *reply = &iob->reply;
2029         long timeout = iob->timeout;
2030         int rc;
2031
2032         QETH_CARD_TEXT(card, 2, "sendctl");
2033
2034         reply->callback = reply_cb;
2035         reply->param = reply_param;
2036
2037         timeout = wait_event_interruptible_timeout(card->wait_q,
2038                                                    qeth_trylock_channel(channel, iob),
2039                                                    timeout);
2040         if (timeout <= 0) {
2041                 qeth_put_cmd(iob);
2042                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2043         }
2044
2045         if (iob->finalize)
2046                 iob->finalize(card, iob);
2047         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
2048
2049         qeth_enqueue_cmd(card, iob);
2050
2051         /* This pairs with iob->callback, and keeps the iob alive after IO: */
2052         qeth_get_cmd(iob);
2053
2054         QETH_CARD_TEXT(card, 6, "noirqpnd");
2055         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2056         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
2057                                       (addr_t) iob, 0, 0, timeout);
2058         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2059         if (rc) {
2060                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2061                                  CARD_DEVID(card), rc);
2062                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2063                 qeth_dequeue_cmd(card, iob);
2064                 qeth_put_cmd(iob);
2065                 qeth_unlock_channel(card, channel);
2066                 goto out;
2067         }
2068
2069         timeout = wait_for_completion_interruptible_timeout(&iob->done,
2070                                                             timeout);
2071         if (timeout <= 0)
2072                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
2073
2074         qeth_dequeue_cmd(card, iob);
2075
2076         if (reply_cb) {
2077                 /* Wait until the callback for a late reply has completed: */
2078                 spin_lock_irq(&iob->lock);
2079                 if (rc)
2080                         /* Zap any callback that's still pending: */
2081                         iob->rc = rc;
2082                 spin_unlock_irq(&iob->lock);
2083         }
2084
2085         if (!rc)
2086                 rc = iob->rc;
2087
2088 out:
2089         qeth_put_cmd(iob);
2090         return rc;
2091 }
2092
2093 struct qeth_node_desc {
2094         struct node_descriptor nd1;
2095         struct node_descriptor nd2;
2096         struct node_descriptor nd3;
2097 };
2098
2099 static void qeth_read_conf_data_cb(struct qeth_card *card,
2100                                    struct qeth_cmd_buffer *iob,
2101                                    unsigned int data_length)
2102 {
2103         struct qeth_node_desc *nd = (struct qeth_node_desc *) iob->data;
2104         int rc = 0;
2105         u8 *tag;
2106
2107         QETH_CARD_TEXT(card, 2, "cfgunit");
2108
2109         if (data_length < sizeof(*nd)) {
2110                 rc = -EINVAL;
2111                 goto out;
2112         }
2113
2114         card->info.is_vm_nic = nd->nd1.plant[0] == _ascebc['V'] &&
2115                                nd->nd1.plant[1] == _ascebc['M'];
2116         tag = (u8 *)&nd->nd1.tag;
2117         card->info.chpid = tag[0];
2118         card->info.unit_addr2 = tag[1];
2119
2120         tag = (u8 *)&nd->nd2.tag;
2121         card->info.cula = tag[1];
2122
2123         card->info.use_v1_blkt = nd->nd3.model[0] == 0xF0 &&
2124                                  nd->nd3.model[1] == 0xF0 &&
2125                                  nd->nd3.model[2] >= 0xF1 &&
2126                                  nd->nd3.model[2] <= 0xF4;
2127
2128 out:
2129         qeth_notify_cmd(iob, rc);
2130         qeth_put_cmd(iob);
2131 }
2132
2133 static int qeth_read_conf_data(struct qeth_card *card)
2134 {
2135         struct qeth_channel *channel = &card->data;
2136         struct qeth_cmd_buffer *iob;
2137         struct ciw *ciw;
2138
2139         /* scan for RCD command in extended SenseID data */
2140         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
2141         if (!ciw || ciw->cmd == 0)
2142                 return -EOPNOTSUPP;
2143         if (ciw->count < sizeof(struct qeth_node_desc))
2144                 return -EINVAL;
2145
2146         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
2147         if (!iob)
2148                 return -ENOMEM;
2149
2150         iob->callback = qeth_read_conf_data_cb;
2151         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
2152                        iob->data);
2153
2154         return qeth_send_control_data(card, iob, NULL, NULL);
2155 }
2156
2157 static int qeth_idx_check_activate_response(struct qeth_card *card,
2158                                             struct qeth_channel *channel,
2159                                             struct qeth_cmd_buffer *iob)
2160 {
2161         int rc;
2162
2163         rc = qeth_check_idx_response(card, iob->data);
2164         if (rc)
2165                 return rc;
2166
2167         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
2168                 return 0;
2169
2170         /* negative reply: */
2171         QETH_CARD_TEXT_(card, 2, "idxneg%c",
2172                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
2173
2174         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
2175         case QETH_IDX_ACT_ERR_EXCL:
2176                 dev_err(&channel->ccwdev->dev,
2177                         "The adapter is used exclusively by another host\n");
2178                 return -EBUSY;
2179         case QETH_IDX_ACT_ERR_AUTH:
2180         case QETH_IDX_ACT_ERR_AUTH_USER:
2181                 dev_err(&channel->ccwdev->dev,
2182                         "Setting the device online failed because of insufficient authorization\n");
2183                 return -EPERM;
2184         default:
2185                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
2186                                  CCW_DEVID(channel->ccwdev));
2187                 return -EIO;
2188         }
2189 }
2190
2191 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
2192                                               struct qeth_cmd_buffer *iob,
2193                                               unsigned int data_length)
2194 {
2195         struct qeth_channel *channel = iob->channel;
2196         u16 peer_level;
2197         int rc;
2198
2199         QETH_CARD_TEXT(card, 2, "idxrdcb");
2200
2201         rc = qeth_idx_check_activate_response(card, channel, iob);
2202         if (rc)
2203                 goto out;
2204
2205         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2206         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
2207                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2208                                  CCW_DEVID(channel->ccwdev),
2209                                  card->info.func_level, peer_level);
2210                 rc = -EINVAL;
2211                 goto out;
2212         }
2213
2214         memcpy(&card->token.issuer_rm_r,
2215                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2216                QETH_MPC_TOKEN_LENGTH);
2217         memcpy(&card->info.mcl_level[0],
2218                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
2219
2220 out:
2221         qeth_notify_cmd(iob, rc);
2222         qeth_put_cmd(iob);
2223 }
2224
2225 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
2226                                                struct qeth_cmd_buffer *iob,
2227                                                unsigned int data_length)
2228 {
2229         struct qeth_channel *channel = iob->channel;
2230         u16 peer_level;
2231         int rc;
2232
2233         QETH_CARD_TEXT(card, 2, "idxwrcb");
2234
2235         rc = qeth_idx_check_activate_response(card, channel, iob);
2236         if (rc)
2237                 goto out;
2238
2239         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
2240         if ((peer_level & ~0x0100) !=
2241             qeth_peer_func_level(card->info.func_level)) {
2242                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
2243                                  CCW_DEVID(channel->ccwdev),
2244                                  card->info.func_level, peer_level);
2245                 rc = -EINVAL;
2246         }
2247
2248 out:
2249         qeth_notify_cmd(iob, rc);
2250         qeth_put_cmd(iob);
2251 }
2252
2253 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
2254                                         struct qeth_cmd_buffer *iob)
2255 {
2256         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
2257         u8 port = ((u8)card->dev->dev_port) | 0x80;
2258         struct ccw1 *ccw = __ccw_from_cmd(iob);
2259
2260         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
2261                        iob->data);
2262         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
2263         iob->finalize = qeth_idx_finalize_cmd;
2264
2265         port |= QETH_IDX_ACT_INVAL_FRAME;
2266         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
2267         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
2268                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
2269         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
2270                &card->info.func_level, 2);
2271         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &card->info.ddev_devno, 2);
2272         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
2273 }
2274
2275 static int qeth_idx_activate_read_channel(struct qeth_card *card)
2276 {
2277         struct qeth_channel *channel = &card->read;
2278         struct qeth_cmd_buffer *iob;
2279         int rc;
2280
2281         QETH_CARD_TEXT(card, 2, "idxread");
2282
2283         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2284         if (!iob)
2285                 return -ENOMEM;
2286
2287         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
2288         qeth_idx_setup_activate_cmd(card, iob);
2289         iob->callback = qeth_idx_activate_read_channel_cb;
2290
2291         rc = qeth_send_control_data(card, iob, NULL, NULL);
2292         if (rc)
2293                 return rc;
2294
2295         channel->state = CH_STATE_UP;
2296         return 0;
2297 }
2298
2299 static int qeth_idx_activate_write_channel(struct qeth_card *card)
2300 {
2301         struct qeth_channel *channel = &card->write;
2302         struct qeth_cmd_buffer *iob;
2303         int rc;
2304
2305         QETH_CARD_TEXT(card, 2, "idxwrite");
2306
2307         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
2308         if (!iob)
2309                 return -ENOMEM;
2310
2311         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
2312         qeth_idx_setup_activate_cmd(card, iob);
2313         iob->callback = qeth_idx_activate_write_channel_cb;
2314
2315         rc = qeth_send_control_data(card, iob, NULL, NULL);
2316         if (rc)
2317                 return rc;
2318
2319         channel->state = CH_STATE_UP;
2320         return 0;
2321 }
2322
2323 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2324                 unsigned long data)
2325 {
2326         struct qeth_cmd_buffer *iob;
2327
2328         QETH_CARD_TEXT(card, 2, "cmenblcb");
2329
2330         iob = (struct qeth_cmd_buffer *) data;
2331         memcpy(&card->token.cm_filter_r,
2332                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2333                QETH_MPC_TOKEN_LENGTH);
2334         return 0;
2335 }
2336
2337 static int qeth_cm_enable(struct qeth_card *card)
2338 {
2339         struct qeth_cmd_buffer *iob;
2340
2341         QETH_CARD_TEXT(card, 2, "cmenable");
2342
2343         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2344         if (!iob)
2345                 return -ENOMEM;
2346
2347         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2348                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2349         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2350                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2351
2352         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2353 }
2354
2355 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2356                 unsigned long data)
2357 {
2358         struct qeth_cmd_buffer *iob;
2359
2360         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2361
2362         iob = (struct qeth_cmd_buffer *) data;
2363         memcpy(&card->token.cm_connection_r,
2364                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2365                QETH_MPC_TOKEN_LENGTH);
2366         return 0;
2367 }
2368
2369 static int qeth_cm_setup(struct qeth_card *card)
2370 {
2371         struct qeth_cmd_buffer *iob;
2372
2373         QETH_CARD_TEXT(card, 2, "cmsetup");
2374
2375         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2376         if (!iob)
2377                 return -ENOMEM;
2378
2379         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2380                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2381         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2382                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2383         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2384                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2385         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2386 }
2387
2388 static bool qeth_is_supported_link_type(struct qeth_card *card, u8 link_type)
2389 {
2390         if (link_type == QETH_LINK_TYPE_LANE_TR ||
2391             link_type == QETH_LINK_TYPE_HSTR) {
2392                 dev_err(&card->gdev->dev, "Unsupported Token Ring device\n");
2393                 return false;
2394         }
2395
2396         return true;
2397 }
2398
2399 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2400 {
2401         struct net_device *dev = card->dev;
2402         unsigned int new_mtu;
2403
2404         if (!max_mtu) {
2405                 /* IQD needs accurate max MTU to set up its RX buffers: */
2406                 if (IS_IQD(card))
2407                         return -EINVAL;
2408                 /* tolerate quirky HW: */
2409                 max_mtu = ETH_MAX_MTU;
2410         }
2411
2412         rtnl_lock();
2413         if (IS_IQD(card)) {
2414                 /* move any device with default MTU to new max MTU: */
2415                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2416
2417                 /* adjust RX buffer size to new max MTU: */
2418                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2419                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2420                         qeth_free_qdio_queues(card);
2421         } else {
2422                 if (dev->mtu)
2423                         new_mtu = dev->mtu;
2424                 /* default MTUs for first setup: */
2425                 else if (IS_LAYER2(card))
2426                         new_mtu = ETH_DATA_LEN;
2427                 else
2428                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2429         }
2430
2431         dev->max_mtu = max_mtu;
2432         dev->mtu = min(new_mtu, max_mtu);
2433         rtnl_unlock();
2434         return 0;
2435 }
2436
2437 static int qeth_get_mtu_outof_framesize(int framesize)
2438 {
2439         switch (framesize) {
2440         case 0x4000:
2441                 return 8192;
2442         case 0x6000:
2443                 return 16384;
2444         case 0xa000:
2445                 return 32768;
2446         case 0xffff:
2447                 return 57344;
2448         default:
2449                 return 0;
2450         }
2451 }
2452
2453 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2454                 unsigned long data)
2455 {
2456         __u16 mtu, framesize;
2457         __u16 len;
2458         struct qeth_cmd_buffer *iob;
2459         u8 link_type = 0;
2460
2461         QETH_CARD_TEXT(card, 2, "ulpenacb");
2462
2463         iob = (struct qeth_cmd_buffer *) data;
2464         memcpy(&card->token.ulp_filter_r,
2465                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2466                QETH_MPC_TOKEN_LENGTH);
2467         if (IS_IQD(card)) {
2468                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2469                 mtu = qeth_get_mtu_outof_framesize(framesize);
2470         } else {
2471                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2472         }
2473         *(u16 *)reply->param = mtu;
2474
2475         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2476         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2477                 memcpy(&link_type,
2478                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2479                 if (!qeth_is_supported_link_type(card, link_type))
2480                         return -EPROTONOSUPPORT;
2481         }
2482
2483         card->info.link_type = link_type;
2484         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2485         return 0;
2486 }
2487
2488 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2489 {
2490         return IS_LAYER2(card) ? QETH_MPC_PROT_L2 : QETH_MPC_PROT_L3;
2491 }
2492
2493 static int qeth_ulp_enable(struct qeth_card *card)
2494 {
2495         u8 prot_type = qeth_mpc_select_prot_type(card);
2496         struct qeth_cmd_buffer *iob;
2497         u16 max_mtu;
2498         int rc;
2499
2500         QETH_CARD_TEXT(card, 2, "ulpenabl");
2501
2502         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2503         if (!iob)
2504                 return -ENOMEM;
2505
2506         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2507         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2508         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2509                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2510         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2511                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2512         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2513         if (rc)
2514                 return rc;
2515         return qeth_update_max_mtu(card, max_mtu);
2516 }
2517
2518 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2519                 unsigned long data)
2520 {
2521         struct qeth_cmd_buffer *iob;
2522
2523         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2524
2525         iob = (struct qeth_cmd_buffer *) data;
2526         memcpy(&card->token.ulp_connection_r,
2527                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2528                QETH_MPC_TOKEN_LENGTH);
2529         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2530                      3)) {
2531                 QETH_CARD_TEXT(card, 2, "olmlimit");
2532                 dev_err(&card->gdev->dev, "A connection could not be "
2533                         "established because of an OLM limit\n");
2534                 return -EMLINK;
2535         }
2536         return 0;
2537 }
2538
2539 static int qeth_ulp_setup(struct qeth_card *card)
2540 {
2541         __u16 temp;
2542         struct qeth_cmd_buffer *iob;
2543
2544         QETH_CARD_TEXT(card, 2, "ulpsetup");
2545
2546         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2547         if (!iob)
2548                 return -ENOMEM;
2549
2550         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2551                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2552         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2553                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2554         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2555                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2556
2557         memcpy(QETH_ULP_SETUP_CUA(iob->data), &card->info.ddev_devno, 2);
2558         temp = (card->info.cula << 8) + card->info.unit_addr2;
2559         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2560         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2561 }
2562
2563 static int qeth_alloc_out_buf(struct qeth_qdio_out_q *q, unsigned int bidx,
2564                               gfp_t gfp)
2565 {
2566         struct qeth_qdio_out_buffer *newbuf;
2567
2568         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, gfp);
2569         if (!newbuf)
2570                 return -ENOMEM;
2571
2572         newbuf->buffer = q->qdio_bufs[bidx];
2573         skb_queue_head_init(&newbuf->skb_list);
2574         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2575         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2576         q->bufs[bidx] = newbuf;
2577         return 0;
2578 }
2579
2580 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2581 {
2582         if (!q)
2583                 return;
2584
2585         qeth_drain_output_queue(q, true);
2586         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2587         kfree(q);
2588 }
2589
2590 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2591 {
2592         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2593         unsigned int i;
2594
2595         if (!q)
2596                 return NULL;
2597
2598         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q))
2599                 goto err_qdio_bufs;
2600
2601         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
2602                 if (qeth_alloc_out_buf(q, i, GFP_KERNEL))
2603                         goto err_out_bufs;
2604         }
2605
2606         return q;
2607
2608 err_out_bufs:
2609         while (i > 0)
2610                 qeth_free_out_buf(q->bufs[--i]);
2611         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2612 err_qdio_bufs:
2613         kfree(q);
2614         return NULL;
2615 }
2616
2617 static void qeth_tx_completion_timer(struct timer_list *timer)
2618 {
2619         struct qeth_qdio_out_q *queue = from_timer(queue, timer, timer);
2620
2621         napi_schedule(&queue->napi);
2622         QETH_TXQ_STAT_INC(queue, completion_timer);
2623 }
2624
2625 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2626 {
2627         unsigned int i;
2628
2629         QETH_CARD_TEXT(card, 2, "allcqdbf");
2630
2631         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2632                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2633                 return 0;
2634
2635         /* inbound buffer pool */
2636         if (qeth_alloc_buffer_pool(card))
2637                 goto out_buffer_pool;
2638
2639         /* outbound */
2640         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2641                 struct qeth_qdio_out_q *queue;
2642
2643                 queue = qeth_alloc_output_queue();
2644                 if (!queue)
2645                         goto out_freeoutq;
2646                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2647                 QETH_CARD_HEX(card, 2, &queue, sizeof(void *));
2648                 card->qdio.out_qs[i] = queue;
2649                 queue->card = card;
2650                 queue->queue_no = i;
2651                 INIT_LIST_HEAD(&queue->pending_bufs);
2652                 spin_lock_init(&queue->lock);
2653                 timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
2654                 if (IS_IQD(card)) {
2655                         queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
2656                         queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
2657                         queue->rescan_usecs = QETH_TX_TIMER_USECS;
2658                 } else {
2659                         queue->coalesce_usecs = USEC_PER_SEC;
2660                         queue->max_coalesced_frames = 0;
2661                         queue->rescan_usecs = 10 * USEC_PER_SEC;
2662                 }
2663                 queue->priority = QETH_QIB_PQUE_PRIO_DEFAULT;
2664         }
2665
2666         /* completion */
2667         if (qeth_alloc_cq(card))
2668                 goto out_freeoutq;
2669
2670         return 0;
2671
2672 out_freeoutq:
2673         while (i > 0) {
2674                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2675                 card->qdio.out_qs[i] = NULL;
2676         }
2677         qeth_free_buffer_pool(card);
2678 out_buffer_pool:
2679         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2680         return -ENOMEM;
2681 }
2682
2683 static void qeth_free_qdio_queues(struct qeth_card *card)
2684 {
2685         int i, j;
2686
2687         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2688                 QETH_QDIO_UNINITIALIZED)
2689                 return;
2690
2691         qeth_free_cq(card);
2692         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2693                 if (card->qdio.in_q->bufs[j].rx_skb) {
2694                         consume_skb(card->qdio.in_q->bufs[j].rx_skb);
2695                         card->qdio.in_q->bufs[j].rx_skb = NULL;
2696                 }
2697         }
2698
2699         /* inbound buffer pool */
2700         qeth_free_buffer_pool(card);
2701         /* free outbound qdio_qs */
2702         for (i = 0; i < card->qdio.no_out_queues; i++) {
2703                 qeth_free_output_queue(card->qdio.out_qs[i]);
2704                 card->qdio.out_qs[i] = NULL;
2705         }
2706 }
2707
2708 static void qeth_fill_qib_parms(struct qeth_card *card,
2709                                 struct qeth_qib_parms *parms)
2710 {
2711         struct qeth_qdio_out_q *queue;
2712         unsigned int i;
2713
2714         parms->pcit_magic[0] = 'P';
2715         parms->pcit_magic[1] = 'C';
2716         parms->pcit_magic[2] = 'I';
2717         parms->pcit_magic[3] = 'T';
2718         ASCEBC(parms->pcit_magic, sizeof(parms->pcit_magic));
2719         parms->pcit_a = QETH_PCI_THRESHOLD_A(card);
2720         parms->pcit_b = QETH_PCI_THRESHOLD_B(card);
2721         parms->pcit_c = QETH_PCI_TIMER_VALUE(card);
2722
2723         parms->blkt_magic[0] = 'B';
2724         parms->blkt_magic[1] = 'L';
2725         parms->blkt_magic[2] = 'K';
2726         parms->blkt_magic[3] = 'T';
2727         ASCEBC(parms->blkt_magic, sizeof(parms->blkt_magic));
2728         parms->blkt_total = card->info.blkt.time_total;
2729         parms->blkt_inter_packet = card->info.blkt.inter_packet;
2730         parms->blkt_inter_packet_jumbo = card->info.blkt.inter_packet_jumbo;
2731
2732         /* Prio-queueing implicitly uses the default priorities: */
2733         if (qeth_uses_tx_prio_queueing(card) || card->qdio.no_out_queues == 1)
2734                 return;
2735
2736         parms->pque_magic[0] = 'P';
2737         parms->pque_magic[1] = 'Q';
2738         parms->pque_magic[2] = 'U';
2739         parms->pque_magic[3] = 'E';
2740         ASCEBC(parms->pque_magic, sizeof(parms->pque_magic));
2741         parms->pque_order = QETH_QIB_PQUE_ORDER_RR;
2742         parms->pque_units = QETH_QIB_PQUE_UNITS_SBAL;
2743
2744         qeth_for_each_output_queue(card, queue, i)
2745                 parms->pque_priority[i] = queue->priority;
2746 }
2747
2748 static int qeth_qdio_activate(struct qeth_card *card)
2749 {
2750         QETH_CARD_TEXT(card, 3, "qdioact");
2751         return qdio_activate(CARD_DDEV(card));
2752 }
2753
2754 static int qeth_dm_act(struct qeth_card *card)
2755 {
2756         struct qeth_cmd_buffer *iob;
2757
2758         QETH_CARD_TEXT(card, 2, "dmact");
2759
2760         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2761         if (!iob)
2762                 return -ENOMEM;
2763
2764         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2765                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2766         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2767                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2768         return qeth_send_control_data(card, iob, NULL, NULL);
2769 }
2770
2771 static int qeth_mpc_initialize(struct qeth_card *card)
2772 {
2773         int rc;
2774
2775         QETH_CARD_TEXT(card, 2, "mpcinit");
2776
2777         rc = qeth_issue_next_read(card);
2778         if (rc) {
2779                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2780                 return rc;
2781         }
2782         rc = qeth_cm_enable(card);
2783         if (rc) {
2784                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2785                 return rc;
2786         }
2787         rc = qeth_cm_setup(card);
2788         if (rc) {
2789                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2790                 return rc;
2791         }
2792         rc = qeth_ulp_enable(card);
2793         if (rc) {
2794                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2795                 return rc;
2796         }
2797         rc = qeth_ulp_setup(card);
2798         if (rc) {
2799                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2800                 return rc;
2801         }
2802         rc = qeth_alloc_qdio_queues(card);
2803         if (rc) {
2804                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2805                 return rc;
2806         }
2807         rc = qeth_qdio_establish(card);
2808         if (rc) {
2809                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2810                 qeth_free_qdio_queues(card);
2811                 return rc;
2812         }
2813         rc = qeth_qdio_activate(card);
2814         if (rc) {
2815                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2816                 return rc;
2817         }
2818         rc = qeth_dm_act(card);
2819         if (rc) {
2820                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2821                 return rc;
2822         }
2823
2824         return 0;
2825 }
2826
2827 static void qeth_print_status_message(struct qeth_card *card)
2828 {
2829         switch (card->info.type) {
2830         case QETH_CARD_TYPE_OSD:
2831         case QETH_CARD_TYPE_OSM:
2832         case QETH_CARD_TYPE_OSX:
2833                 /* VM will use a non-zero first character
2834                  * to indicate a HiperSockets like reporting
2835                  * of the level OSA sets the first character to zero
2836                  * */
2837                 if (!card->info.mcl_level[0]) {
2838                         scnprintf(card->info.mcl_level,
2839                                   sizeof(card->info.mcl_level),
2840                                   "%02x%02x",
2841                                   card->info.mcl_level[2],
2842                                   card->info.mcl_level[3]);
2843                         break;
2844                 }
2845                 fallthrough;
2846         case QETH_CARD_TYPE_IQD:
2847                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2848                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2849                                 card->info.mcl_level[0]];
2850                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2851                                 card->info.mcl_level[1]];
2852                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2853                                 card->info.mcl_level[2]];
2854                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2855                                 card->info.mcl_level[3]];
2856                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2857                 }
2858                 break;
2859         default:
2860                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2861         }
2862         dev_info(&card->gdev->dev,
2863                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2864                  qeth_get_cardname(card),
2865                  (card->info.mcl_level[0]) ? " (level: " : "",
2866                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2867                  (card->info.mcl_level[0]) ? ")" : "",
2868                  qeth_get_cardname_short(card));
2869 }
2870
2871 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2872 {
2873         struct qeth_buffer_pool_entry *entry;
2874
2875         QETH_CARD_TEXT(card, 5, "inwrklst");
2876
2877         list_for_each_entry(entry,
2878                             &card->qdio.init_pool.entry_list, init_list) {
2879                 qeth_put_buffer_pool_entry(card, entry);
2880         }
2881 }
2882
2883 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2884                                         struct qeth_card *card)
2885 {
2886         struct qeth_buffer_pool_entry *entry;
2887         int i, free;
2888
2889         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2890                 return NULL;
2891
2892         list_for_each_entry(entry, &card->qdio.in_buf_pool.entry_list, list) {
2893                 free = 1;
2894                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2895                         if (page_count(entry->elements[i]) > 1) {
2896                                 free = 0;
2897                                 break;
2898                         }
2899                 }
2900                 if (free) {
2901                         list_del_init(&entry->list);
2902                         return entry;
2903                 }
2904         }
2905
2906         /* no free buffer in pool so take first one and swap pages */
2907         entry = list_first_entry(&card->qdio.in_buf_pool.entry_list,
2908                                  struct qeth_buffer_pool_entry, list);
2909         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2910                 if (page_count(entry->elements[i]) > 1) {
2911                         struct page *page = dev_alloc_page();
2912
2913                         if (!page)
2914                                 return NULL;
2915
2916                         __free_page(entry->elements[i]);
2917                         entry->elements[i] = page;
2918                         QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2919                 }
2920         }
2921         list_del_init(&entry->list);
2922         return entry;
2923 }
2924
2925 static int qeth_init_input_buffer(struct qeth_card *card,
2926                 struct qeth_qdio_buffer *buf)
2927 {
2928         struct qeth_buffer_pool_entry *pool_entry = buf->pool_entry;
2929         int i;
2930
2931         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2932                 buf->rx_skb = netdev_alloc_skb(card->dev,
2933                                                ETH_HLEN +
2934                                                sizeof(struct ipv6hdr));
2935                 if (!buf->rx_skb)
2936                         return -ENOMEM;
2937         }
2938
2939         if (!pool_entry) {
2940                 pool_entry = qeth_find_free_buffer_pool_entry(card);
2941                 if (!pool_entry)
2942                         return -ENOBUFS;
2943
2944                 buf->pool_entry = pool_entry;
2945         }
2946
2947         /*
2948          * since the buffer is accessed only from the input_tasklet
2949          * there shouldn't be a need to synchronize; also, since we use
2950          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2951          * buffers
2952          */
2953         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2954                 buf->buffer->element[i].length = PAGE_SIZE;
2955                 buf->buffer->element[i].addr = u64_to_dma64(
2956                         page_to_phys(pool_entry->elements[i]));
2957                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2958                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2959                 else
2960                         buf->buffer->element[i].eflags = 0;
2961                 buf->buffer->element[i].sflags = 0;
2962         }
2963         return 0;
2964 }
2965
2966 static unsigned int qeth_tx_select_bulk_max(struct qeth_card *card,
2967                                             struct qeth_qdio_out_q *queue)
2968 {
2969         if (!IS_IQD(card) ||
2970             qeth_iqd_is_mcast_queue(card, queue) ||
2971             card->options.cq == QETH_CQ_ENABLED ||
2972             qdio_get_ssqd_desc(CARD_DDEV(card), &card->ssqd))
2973                 return 1;
2974
2975         return card->ssqd.mmwc ? card->ssqd.mmwc : 1;
2976 }
2977
2978 static int qeth_init_qdio_queues(struct qeth_card *card)
2979 {
2980         unsigned int rx_bufs = card->qdio.in_buf_pool.buf_count;
2981         unsigned int i;
2982         int rc;
2983
2984         QETH_CARD_TEXT(card, 2, "initqdqs");
2985
2986         /* inbound queue */
2987         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2988         memset(&card->rx, 0, sizeof(struct qeth_rx));
2989
2990         qeth_initialize_working_pool_list(card);
2991         /*give only as many buffers to hardware as we have buffer pool entries*/
2992         for (i = 0; i < rx_bufs; i++) {
2993                 rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2994                 if (rc)
2995                         return rc;
2996         }
2997
2998         card->qdio.in_q->next_buf_to_init = QDIO_BUFNR(rx_bufs);
2999         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0, 0, rx_bufs);
3000         if (rc) {
3001                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
3002                 return rc;
3003         }
3004
3005         /* completion */
3006         rc = qeth_cq_init(card);
3007         if (rc) {
3008                 return rc;
3009         }
3010
3011         /* outbound queue */
3012         for (i = 0; i < card->qdio.no_out_queues; ++i) {
3013                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
3014
3015                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
3016                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3017                 queue->next_buf_to_fill = 0;
3018                 queue->do_pack = 0;
3019                 queue->prev_hdr = NULL;
3020                 queue->coalesced_frames = 0;
3021                 queue->bulk_start = 0;
3022                 queue->bulk_count = 0;
3023                 queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
3024                 atomic_set(&queue->used_buffers, 0);
3025                 atomic_set(&queue->set_pci_flags_count, 0);
3026                 netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
3027         }
3028         return 0;
3029 }
3030
3031 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
3032                                   struct qeth_cmd_buffer *iob)
3033 {
3034         qeth_mpc_finalize_cmd(card, iob);
3035
3036         /* override with IPA-specific values: */
3037         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa++;
3038 }
3039
3040 static void qeth_prepare_ipa_cmd(struct qeth_card *card,
3041                                  struct qeth_cmd_buffer *iob, u16 cmd_length)
3042 {
3043         u8 prot_type = qeth_mpc_select_prot_type(card);
3044         u16 total_length = iob->length;
3045
3046         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
3047                        iob->data);
3048         iob->finalize = qeth_ipa_finalize_cmd;
3049
3050         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
3051         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
3052         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
3053         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
3054         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
3055         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
3056                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
3057         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
3058 }
3059
3060 static bool qeth_ipa_match_reply(struct qeth_cmd_buffer *iob,
3061                                  struct qeth_cmd_buffer *reply)
3062 {
3063         struct qeth_ipa_cmd *ipa_reply = __ipa_reply(reply);
3064
3065         return ipa_reply && (__ipa_cmd(iob)->hdr.seqno == ipa_reply->hdr.seqno);
3066 }
3067
3068 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
3069                                            enum qeth_ipa_cmds cmd_code,
3070                                            enum qeth_prot_versions prot,
3071                                            unsigned int data_length)
3072 {
3073         struct qeth_cmd_buffer *iob;
3074         struct qeth_ipacmd_hdr *hdr;
3075
3076         data_length += offsetof(struct qeth_ipa_cmd, data);
3077         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
3078                              QETH_IPA_TIMEOUT);
3079         if (!iob)
3080                 return NULL;
3081
3082         qeth_prepare_ipa_cmd(card, iob, data_length);
3083         iob->match = qeth_ipa_match_reply;
3084
3085         hdr = &__ipa_cmd(iob)->hdr;
3086         hdr->command = cmd_code;
3087         hdr->initiator = IPA_CMD_INITIATOR_HOST;
3088         /* hdr->seqno is set by qeth_send_control_data() */
3089         hdr->adapter_type = QETH_LINK_TYPE_FAST_ETH;
3090         hdr->rel_adapter_no = (u8) card->dev->dev_port;
3091         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
3092         hdr->param_count = 1;
3093         hdr->prot_version = prot;
3094         return iob;
3095 }
3096 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
3097
3098 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
3099                                 struct qeth_reply *reply, unsigned long data)
3100 {
3101         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3102
3103         return (cmd->hdr.return_code) ? -EIO : 0;
3104 }
3105
3106 /*
3107  * qeth_send_ipa_cmd() - send an IPA command
3108  *
3109  * See qeth_send_control_data() for explanation of the arguments.
3110  */
3111
3112 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
3113                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
3114                         unsigned long),
3115                 void *reply_param)
3116 {
3117         int rc;
3118
3119         QETH_CARD_TEXT(card, 4, "sendipa");
3120
3121         if (card->read_or_write_problem) {
3122                 qeth_put_cmd(iob);
3123                 return -EIO;
3124         }
3125
3126         if (reply_cb == NULL)
3127                 reply_cb = qeth_send_ipa_cmd_cb;
3128         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
3129         if (rc == -ETIME) {
3130                 qeth_clear_ipacmd_list(card);
3131                 qeth_schedule_recovery(card);
3132         }
3133         return rc;
3134 }
3135 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
3136
3137 static int qeth_send_startlan_cb(struct qeth_card *card,
3138                                  struct qeth_reply *reply, unsigned long data)
3139 {
3140         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3141
3142         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
3143                 return -ENETDOWN;
3144
3145         return (cmd->hdr.return_code) ? -EIO : 0;
3146 }
3147
3148 static int qeth_send_startlan(struct qeth_card *card)
3149 {
3150         struct qeth_cmd_buffer *iob;
3151
3152         QETH_CARD_TEXT(card, 2, "strtlan");
3153
3154         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
3155         if (!iob)
3156                 return -ENOMEM;
3157         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
3158 }
3159
3160 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
3161 {
3162         if (!cmd->hdr.return_code)
3163                 cmd->hdr.return_code =
3164                         cmd->data.setadapterparms.hdr.return_code;
3165         return cmd->hdr.return_code;
3166 }
3167
3168 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
3169                 struct qeth_reply *reply, unsigned long data)
3170 {
3171         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3172         struct qeth_query_cmds_supp *query_cmd;
3173
3174         QETH_CARD_TEXT(card, 3, "quyadpcb");
3175         if (qeth_setadpparms_inspect_rc(cmd))
3176                 return -EIO;
3177
3178         query_cmd = &cmd->data.setadapterparms.data.query_cmds_supp;
3179         if (query_cmd->lan_type & 0x7f) {
3180                 if (!qeth_is_supported_link_type(card, query_cmd->lan_type))
3181                         return -EPROTONOSUPPORT;
3182
3183                 card->info.link_type = query_cmd->lan_type;
3184                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
3185         }
3186
3187         card->options.adp.supported = query_cmd->supported_cmds;
3188         return 0;
3189 }
3190
3191 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
3192                                                     enum qeth_ipa_setadp_cmd adp_cmd,
3193                                                     unsigned int data_length)
3194 {
3195         struct qeth_ipacmd_setadpparms_hdr *hdr;
3196         struct qeth_cmd_buffer *iob;
3197
3198         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
3199                                  data_length +
3200                                  offsetof(struct qeth_ipacmd_setadpparms,
3201                                           data));
3202         if (!iob)
3203                 return NULL;
3204
3205         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
3206         hdr->cmdlength = sizeof(*hdr) + data_length;
3207         hdr->command_code = adp_cmd;
3208         hdr->used_total = 1;
3209         hdr->seq_no = 1;
3210         return iob;
3211 }
3212
3213 static int qeth_query_setadapterparms(struct qeth_card *card)
3214 {
3215         int rc;
3216         struct qeth_cmd_buffer *iob;
3217
3218         QETH_CARD_TEXT(card, 3, "queryadp");
3219         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
3220                                    SETADP_DATA_SIZEOF(query_cmds_supp));
3221         if (!iob)
3222                 return -ENOMEM;
3223         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
3224         return rc;
3225 }
3226
3227 static int qeth_query_ipassists_cb(struct qeth_card *card,
3228                 struct qeth_reply *reply, unsigned long data)
3229 {
3230         struct qeth_ipa_cmd *cmd;
3231
3232         QETH_CARD_TEXT(card, 2, "qipasscb");
3233
3234         cmd = (struct qeth_ipa_cmd *) data;
3235
3236         switch (cmd->hdr.return_code) {
3237         case IPA_RC_SUCCESS:
3238                 break;
3239         case IPA_RC_NOTSUPP:
3240         case IPA_RC_L2_UNSUPPORTED_CMD:
3241                 QETH_CARD_TEXT(card, 2, "ipaunsup");
3242                 card->options.ipa4.supported |= IPA_SETADAPTERPARMS;
3243                 card->options.ipa6.supported |= IPA_SETADAPTERPARMS;
3244                 return -EOPNOTSUPP;
3245         default:
3246                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
3247                                  CARD_DEVID(card), cmd->hdr.return_code);
3248                 return -EIO;
3249         }
3250
3251         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
3252                 card->options.ipa4 = cmd->hdr.assists;
3253         else if (cmd->hdr.prot_version == QETH_PROT_IPV6)
3254                 card->options.ipa6 = cmd->hdr.assists;
3255         else
3256                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3257                                  CARD_DEVID(card));
3258         return 0;
3259 }
3260
3261 static int qeth_query_ipassists(struct qeth_card *card,
3262                                 enum qeth_prot_versions prot)
3263 {
3264         int rc;
3265         struct qeth_cmd_buffer *iob;
3266
3267         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
3268         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
3269         if (!iob)
3270                 return -ENOMEM;
3271         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3272         return rc;
3273 }
3274
3275 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3276                                 struct qeth_reply *reply, unsigned long data)
3277 {
3278         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3279         struct qeth_query_switch_attributes *attrs;
3280         struct qeth_switch_info *sw_info;
3281
3282         QETH_CARD_TEXT(card, 2, "qswiatcb");
3283         if (qeth_setadpparms_inspect_rc(cmd))
3284                 return -EIO;
3285
3286         sw_info = (struct qeth_switch_info *)reply->param;
3287         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3288         sw_info->capabilities = attrs->capabilities;
3289         sw_info->settings = attrs->settings;
3290         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3291                         sw_info->settings);
3292         return 0;
3293 }
3294
3295 int qeth_query_switch_attributes(struct qeth_card *card,
3296                                  struct qeth_switch_info *sw_info)
3297 {
3298         struct qeth_cmd_buffer *iob;
3299
3300         QETH_CARD_TEXT(card, 2, "qswiattr");
3301         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3302                 return -EOPNOTSUPP;
3303         if (!netif_carrier_ok(card->dev))
3304                 return -ENOMEDIUM;
3305         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
3306         if (!iob)
3307                 return -ENOMEM;
3308         return qeth_send_ipa_cmd(card, iob,
3309                                 qeth_query_switch_attributes_cb, sw_info);
3310 }
3311
3312 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
3313                                           enum qeth_diags_cmds sub_cmd,
3314                                           unsigned int data_length)
3315 {
3316         struct qeth_ipacmd_diagass *cmd;
3317         struct qeth_cmd_buffer *iob;
3318
3319         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
3320                                  DIAG_HDR_LEN + data_length);
3321         if (!iob)
3322                 return NULL;
3323
3324         cmd = &__ipa_cmd(iob)->data.diagass;
3325         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
3326         cmd->subcmd = sub_cmd;
3327         return iob;
3328 }
3329 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
3330
3331 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3332                 struct qeth_reply *reply, unsigned long data)
3333 {
3334         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3335         u16 rc = cmd->hdr.return_code;
3336
3337         if (rc) {
3338                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3339                 return -EIO;
3340         }
3341
3342         card->info.diagass_support = cmd->data.diagass.ext;
3343         return 0;
3344 }
3345
3346 static int qeth_query_setdiagass(struct qeth_card *card)
3347 {
3348         struct qeth_cmd_buffer *iob;
3349
3350         QETH_CARD_TEXT(card, 2, "qdiagass");
3351         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
3352         if (!iob)
3353                 return -ENOMEM;
3354         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3355 }
3356
3357 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3358 {
3359         unsigned long info = get_zeroed_page(GFP_KERNEL);
3360         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3361         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3362         struct ccw_dev_id ccwid;
3363         int level;
3364
3365         tid->chpid = card->info.chpid;
3366         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3367         tid->ssid = ccwid.ssid;
3368         tid->devno = ccwid.devno;
3369         if (!info)
3370                 return;
3371         level = stsi(NULL, 0, 0, 0);
3372         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3373                 tid->lparnr = info222->lpar_number;
3374         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3375                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3376                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3377         }
3378         free_page(info);
3379 }
3380
3381 static int qeth_hw_trap_cb(struct qeth_card *card,
3382                 struct qeth_reply *reply, unsigned long data)
3383 {
3384         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3385         u16 rc = cmd->hdr.return_code;
3386
3387         if (rc) {
3388                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3389                 return -EIO;
3390         }
3391         return 0;
3392 }
3393
3394 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3395 {
3396         struct qeth_cmd_buffer *iob;
3397         struct qeth_ipa_cmd *cmd;
3398
3399         QETH_CARD_TEXT(card, 2, "diagtrap");
3400         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
3401         if (!iob)
3402                 return -ENOMEM;
3403         cmd = __ipa_cmd(iob);
3404         cmd->data.diagass.type = 1;
3405         cmd->data.diagass.action = action;
3406         switch (action) {
3407         case QETH_DIAGS_TRAP_ARM:
3408                 cmd->data.diagass.options = 0x0003;
3409                 cmd->data.diagass.ext = 0x00010000 +
3410                         sizeof(struct qeth_trap_id);
3411                 qeth_get_trap_id(card,
3412                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3413                 break;
3414         case QETH_DIAGS_TRAP_DISARM:
3415                 cmd->data.diagass.options = 0x0001;
3416                 break;
3417         case QETH_DIAGS_TRAP_CAPTURE:
3418                 break;
3419         }
3420         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3421 }
3422
3423 static int qeth_check_qdio_errors(struct qeth_card *card,
3424                                   struct qdio_buffer *buf,
3425                                   unsigned int qdio_error,
3426                                   const char *dbftext)
3427 {
3428         if (qdio_error) {
3429                 QETH_CARD_TEXT(card, 2, dbftext);
3430                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3431                                buf->element[15].sflags);
3432                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3433                                buf->element[14].sflags);
3434                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3435                 if ((buf->element[15].sflags) == 0x12) {
3436                         QETH_CARD_STAT_INC(card, rx_fifo_errors);
3437                         return 0;
3438                 } else
3439                         return 1;
3440         }
3441         return 0;
3442 }
3443
3444 static unsigned int qeth_rx_refill_queue(struct qeth_card *card,
3445                                          unsigned int count)
3446 {
3447         struct qeth_qdio_q *queue = card->qdio.in_q;
3448         struct list_head *lh;
3449         int i;
3450         int rc;
3451         int newcount = 0;
3452
3453         /* only requeue at a certain threshold to avoid SIGAs */
3454         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3455                 for (i = queue->next_buf_to_init;
3456                      i < queue->next_buf_to_init + count; ++i) {
3457                         if (qeth_init_input_buffer(card,
3458                                 &queue->bufs[QDIO_BUFNR(i)])) {
3459                                 break;
3460                         } else {
3461                                 newcount++;
3462                         }
3463                 }
3464
3465                 if (newcount < count) {
3466                         /* we are in memory shortage so we switch back to
3467                            traditional skb allocation and drop packages */
3468                         atomic_set(&card->force_alloc_skb, 3);
3469                         count = newcount;
3470                 } else {
3471                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3472                 }
3473
3474                 if (!count) {
3475                         i = 0;
3476                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3477                                 i++;
3478                         if (i == card->qdio.in_buf_pool.buf_count) {
3479                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3480                                 schedule_delayed_work(
3481                                         &card->buffer_reclaim_work,
3482                                         QETH_RECLAIM_WORK_TIME);
3483                         }
3484                         return 0;
3485                 }
3486
3487                 rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), 0,
3488                                                   queue->next_buf_to_init,
3489                                                   count);
3490                 if (rc) {
3491                         QETH_CARD_TEXT(card, 2, "qinberr");
3492                 }
3493                 queue->next_buf_to_init = QDIO_BUFNR(queue->next_buf_to_init +
3494                                                      count);
3495                 return count;
3496         }
3497
3498         return 0;
3499 }
3500
3501 static void qeth_buffer_reclaim_work(struct work_struct *work)
3502 {
3503         struct qeth_card *card = container_of(to_delayed_work(work),
3504                                               struct qeth_card,
3505                                               buffer_reclaim_work);
3506
3507         local_bh_disable();
3508         napi_schedule(&card->napi);
3509         /* kick-start the NAPI softirq: */
3510         local_bh_enable();
3511 }
3512
3513 static void qeth_handle_send_error(struct qeth_card *card,
3514                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3515 {
3516         int sbalf15 = buffer->buffer->element[15].sflags;
3517
3518         QETH_CARD_TEXT(card, 6, "hdsnderr");
3519         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3520
3521         if (!qdio_err)
3522                 return;
3523
3524         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3525                 return;
3526
3527         QETH_CARD_TEXT(card, 1, "lnkfail");
3528         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3529                        (u16)qdio_err, (u8)sbalf15);
3530 }
3531
3532 /**
3533  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3534  * @queue: queue to check for packing buffer
3535  *
3536  * Returns number of buffers that were prepared for flush.
3537  */
3538 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3539 {
3540         struct qeth_qdio_out_buffer *buffer;
3541
3542         buffer = queue->bufs[queue->next_buf_to_fill];
3543         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3544             (buffer->next_element_to_fill > 0)) {
3545                 /* it's a packing buffer */
3546                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3547                 queue->next_buf_to_fill =
3548                         QDIO_BUFNR(queue->next_buf_to_fill + 1);
3549                 return 1;
3550         }
3551         return 0;
3552 }
3553
3554 /*
3555  * Switched to packing state if the number of used buffers on a queue
3556  * reaches a certain limit.
3557  */
3558 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3559 {
3560         if (!queue->do_pack) {
3561                 if (atomic_read(&queue->used_buffers)
3562                     >= QETH_HIGH_WATERMARK_PACK){
3563                         /* switch non-PACKING -> PACKING */
3564                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3565                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3566                         queue->do_pack = 1;
3567                 }
3568         }
3569 }
3570
3571 /*
3572  * Switches from packing to non-packing mode. If there is a packing
3573  * buffer on the queue this buffer will be prepared to be flushed.
3574  * In that case 1 is returned to inform the caller. If no buffer
3575  * has to be flushed, zero is returned.
3576  */
3577 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3578 {
3579         if (queue->do_pack) {
3580                 if (atomic_read(&queue->used_buffers)
3581                     <= QETH_LOW_WATERMARK_PACK) {
3582                         /* switch PACKING -> non-PACKING */
3583                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3584                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3585                         queue->do_pack = 0;
3586                         return qeth_prep_flush_pack_buffer(queue);
3587                 }
3588         }
3589         return 0;
3590 }
3591
3592 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3593                                int count)
3594 {
3595         struct qeth_qdio_out_buffer *buf = queue->bufs[index];
3596         struct qeth_card *card = queue->card;
3597         unsigned int frames, usecs;
3598         struct qaob *aob = NULL;
3599         int rc;
3600         int i;
3601
3602         for (i = index; i < index + count; ++i) {
3603                 unsigned int bidx = QDIO_BUFNR(i);
3604                 struct sk_buff *skb;
3605
3606                 buf = queue->bufs[bidx];
3607                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3608                                 SBAL_EFLAGS_LAST_ENTRY;
3609                 queue->coalesced_frames += buf->frames;
3610
3611                 if (IS_IQD(card)) {
3612                         skb_queue_walk(&buf->skb_list, skb)
3613                                 skb_tx_timestamp(skb);
3614                 }
3615         }
3616
3617         if (IS_IQD(card)) {
3618                 if (card->options.cq == QETH_CQ_ENABLED &&
3619                     !qeth_iqd_is_mcast_queue(card, queue) &&
3620                     count == 1) {
3621                         if (!buf->aob)
3622                                 buf->aob = kmem_cache_zalloc(qeth_qaob_cache,
3623                                                              GFP_ATOMIC);
3624                         if (buf->aob) {
3625                                 struct qeth_qaob_priv1 *priv;
3626
3627                                 aob = buf->aob;
3628                                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
3629                                 priv->state = QETH_QAOB_ISSUED;
3630                                 priv->queue_no = queue->queue_no;
3631                         }
3632                 }
3633         } else {
3634                 if (!queue->do_pack) {
3635                         if ((atomic_read(&queue->used_buffers) >=
3636                                 (QETH_HIGH_WATERMARK_PACK -
3637                                  QETH_WATERMARK_PACK_FUZZ)) &&
3638                             !atomic_read(&queue->set_pci_flags_count)) {
3639                                 /* it's likely that we'll go to packing
3640                                  * mode soon */
3641                                 atomic_inc(&queue->set_pci_flags_count);
3642                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3643                         }
3644                 } else {
3645                         if (!atomic_read(&queue->set_pci_flags_count)) {
3646                                 /*
3647                                  * there's no outstanding PCI any more, so we
3648                                  * have to request a PCI to be sure the PCI
3649                                  * will wake at some time in the future then we
3650                                  * can flush packed buffers that might still be
3651                                  * hanging around, which can happen if no
3652                                  * further send was requested by the stack
3653                                  */
3654                                 atomic_inc(&queue->set_pci_flags_count);
3655                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3656                         }
3657                 }
3658         }
3659
3660         QETH_TXQ_STAT_INC(queue, doorbell);
3661         rc = qdio_add_bufs_to_output_queue(CARD_DDEV(card), queue->queue_no,
3662                                            index, count, aob);
3663
3664         switch (rc) {
3665         case 0:
3666         case -ENOBUFS:
3667                 /* ignore temporary SIGA errors without busy condition */
3668
3669                 /* Fake the TX completion interrupt: */
3670                 frames = READ_ONCE(queue->max_coalesced_frames);
3671                 usecs = READ_ONCE(queue->coalesce_usecs);
3672
3673                 if (frames && queue->coalesced_frames >= frames) {
3674                         napi_schedule(&queue->napi);
3675                         queue->coalesced_frames = 0;
3676                         QETH_TXQ_STAT_INC(queue, coal_frames);
3677                 } else if (qeth_use_tx_irqs(card) &&
3678                            atomic_read(&queue->used_buffers) >= 32) {
3679                         /* Old behaviour carried over from the qdio layer: */
3680                         napi_schedule(&queue->napi);
3681                         QETH_TXQ_STAT_INC(queue, coal_frames);
3682                 } else if (usecs) {
3683                         qeth_tx_arm_timer(queue, usecs);
3684                 }
3685
3686                 break;
3687         default:
3688                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3689                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3690                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3691                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3692                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3693
3694                 /* this must not happen under normal circumstances. if it
3695                  * happens something is really wrong -> recover */
3696                 qeth_schedule_recovery(queue->card);
3697         }
3698 }
3699
3700 static void qeth_flush_queue(struct qeth_qdio_out_q *queue)
3701 {
3702         qeth_flush_buffers(queue, queue->bulk_start, queue->bulk_count);
3703
3704         queue->bulk_start = QDIO_BUFNR(queue->bulk_start + queue->bulk_count);
3705         queue->prev_hdr = NULL;
3706         queue->bulk_count = 0;
3707 }
3708
3709 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3710 {
3711         /*
3712          * check if we have to switch to non-packing mode or if
3713          * we have to get a pci flag out on the queue
3714          */
3715         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3716             !atomic_read(&queue->set_pci_flags_count)) {
3717                 unsigned int index, flush_cnt;
3718
3719                 spin_lock(&queue->lock);
3720
3721                 index = queue->next_buf_to_fill;
3722
3723                 flush_cnt = qeth_switch_to_nonpacking_if_needed(queue);
3724                 if (!flush_cnt && !atomic_read(&queue->set_pci_flags_count))
3725                         flush_cnt = qeth_prep_flush_pack_buffer(queue);
3726
3727                 if (flush_cnt) {
3728                         qeth_flush_buffers(queue, index, flush_cnt);
3729                         QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3730                 }
3731
3732                 spin_unlock(&queue->lock);
3733         }
3734 }
3735
3736 static void qeth_qdio_poll(struct ccw_device *cdev, unsigned long card_ptr)
3737 {
3738         struct qeth_card *card = (struct qeth_card *)card_ptr;
3739
3740         napi_schedule_irqoff(&card->napi);
3741 }
3742
3743 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3744 {
3745         int rc;
3746
3747         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3748                 rc = -1;
3749                 goto out;
3750         } else {
3751                 if (card->options.cq == cq) {
3752                         rc = 0;
3753                         goto out;
3754                 }
3755
3756                 qeth_free_qdio_queues(card);
3757                 card->options.cq = cq;
3758                 rc = 0;
3759         }
3760 out:
3761         return rc;
3762
3763 }
3764 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3765
3766 static void qeth_qdio_handle_aob(struct qeth_card *card, struct qaob *aob)
3767 {
3768         struct qeth_qaob_priv1 *priv = (struct qeth_qaob_priv1 *)&aob->user1;
3769         unsigned int queue_no = priv->queue_no;
3770
3771         BUILD_BUG_ON(sizeof(*priv) > ARRAY_SIZE(aob->user1));
3772
3773         if (xchg(&priv->state, QETH_QAOB_DONE) == QETH_QAOB_PENDING &&
3774             queue_no < card->qdio.no_out_queues)
3775                 napi_schedule(&card->qdio.out_qs[queue_no]->napi);
3776 }
3777
3778 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3779                                  unsigned int queue, int first_element,
3780                                  int count)
3781 {
3782         struct qeth_qdio_q *cq = card->qdio.c_q;
3783         int i;
3784         int rc;
3785
3786         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3787         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3788         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3789
3790         if (qdio_err) {
3791                 netif_tx_stop_all_queues(card->dev);
3792                 qeth_schedule_recovery(card);
3793                 return;
3794         }
3795
3796         for (i = first_element; i < first_element + count; ++i) {
3797                 struct qdio_buffer *buffer = cq->qdio_bufs[QDIO_BUFNR(i)];
3798                 int e = 0;
3799
3800                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3801                        buffer->element[e].addr) {
3802                         dma64_t phys_aob_addr = buffer->element[e].addr;
3803
3804                         qeth_qdio_handle_aob(card, dma64_to_virt(phys_aob_addr));
3805                         ++e;
3806                 }
3807                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3808         }
3809         rc = qdio_add_bufs_to_input_queue(CARD_DDEV(card), queue,
3810                                           cq->next_buf_to_init, count);
3811         if (rc) {
3812                 dev_warn(&card->gdev->dev,
3813                         "QDIO reported an error, rc=%i\n", rc);
3814                 QETH_CARD_TEXT(card, 2, "qcqherr");
3815         }
3816
3817         cq->next_buf_to_init = QDIO_BUFNR(cq->next_buf_to_init + count);
3818 }
3819
3820 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3821                                     unsigned int qdio_err, int queue,
3822                                     int first_elem, int count,
3823                                     unsigned long card_ptr)
3824 {
3825         struct qeth_card *card = (struct qeth_card *)card_ptr;
3826
3827         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3828         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3829
3830         if (qdio_err)
3831                 qeth_schedule_recovery(card);
3832 }
3833
3834 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3835                                      unsigned int qdio_error, int __queue,
3836                                      int first_element, int count,
3837                                      unsigned long card_ptr)
3838 {
3839         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3840
3841         QETH_CARD_TEXT(card, 2, "achkcond");
3842         netif_tx_stop_all_queues(card->dev);
3843         qeth_schedule_recovery(card);
3844 }
3845
3846 /*
3847  * Note: Function assumes that we have 4 outbound queues.
3848  */
3849 static int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3850 {
3851         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3852         u8 tos;
3853
3854         switch (card->qdio.do_prio_queueing) {
3855         case QETH_PRIO_Q_ING_TOS:
3856         case QETH_PRIO_Q_ING_PREC:
3857                 switch (vlan_get_protocol(skb)) {
3858                 case htons(ETH_P_IP):
3859                         tos = ipv4_get_dsfield(ip_hdr(skb));
3860                         break;
3861                 case htons(ETH_P_IPV6):
3862                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3863                         break;
3864                 default:
3865                         return card->qdio.default_out_queue;
3866                 }
3867                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3868                         return ~tos >> 6 & 3;
3869                 if (tos & IPTOS_MINCOST)
3870                         return 3;
3871                 if (tos & IPTOS_RELIABILITY)
3872                         return 2;
3873                 if (tos & IPTOS_THROUGHPUT)
3874                         return 1;
3875                 if (tos & IPTOS_LOWDELAY)
3876                         return 0;
3877                 break;
3878         case QETH_PRIO_Q_ING_SKB:
3879                 if (skb->priority > 5)
3880                         return 0;
3881                 return ~skb->priority >> 1 & 3;
3882         case QETH_PRIO_Q_ING_VLAN:
3883                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3884                         return ~ntohs(veth->h_vlan_TCI) >>
3885                                (VLAN_PRIO_SHIFT + 1) & 3;
3886                 break;
3887         case QETH_PRIO_Q_ING_FIXED:
3888                 return card->qdio.default_out_queue;
3889         default:
3890                 break;
3891         }
3892         return card->qdio.default_out_queue;
3893 }
3894
3895 /**
3896  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3897  * @skb:                                SKB address
3898  *
3899  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3900  * fragmented part of the SKB. Returns zero for linear SKB.
3901  */
3902 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3903 {
3904         int cnt, elements = 0;
3905
3906         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3907                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3908
3909                 elements += qeth_get_elements_for_range(
3910                         (addr_t)skb_frag_address(frag),
3911                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3912         }
3913         return elements;
3914 }
3915
3916 /**
3917  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3918  *                              to transmit an skb.
3919  * @skb:                        the skb to operate on.
3920  * @data_offset:                skip this part of the skb's linear data
3921  *
3922  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3923  * skb's data (both its linear part and paged fragments).
3924  */
3925 static unsigned int qeth_count_elements(struct sk_buff *skb,
3926                                         unsigned int data_offset)
3927 {
3928         unsigned int elements = qeth_get_elements_for_frags(skb);
3929         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3930         addr_t start = (addr_t)skb->data + data_offset;
3931
3932         if (start != end)
3933                 elements += qeth_get_elements_for_range(start, end);
3934         return elements;
3935 }
3936
3937 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3938                                          MAX_TCP_HEADER)
3939
3940 /**
3941  * qeth_add_hw_header() - add a HW header to an skb.
3942  * @queue: TX queue that the skb will be placed on.
3943  * @skb: skb that the HW header should be added to.
3944  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3945  *       it contains a valid pointer to a qeth_hdr.
3946  * @hdr_len: length of the HW header.
3947  * @proto_len: length of protocol headers that need to be in same page as the
3948  *             HW header.
3949  * @elements: returns the required number of buffer elements for this skb.
3950  *
3951  * Returns the pushed length. If the header can't be pushed on
3952  * (eg. because it would cross a page boundary), it is allocated from
3953  * the cache instead and 0 is returned.
3954  * The number of needed buffer elements is returned in @elements.
3955  * Error to create the hdr is indicated by returning with < 0.
3956  */
3957 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3958                               struct sk_buff *skb, struct qeth_hdr **hdr,
3959                               unsigned int hdr_len, unsigned int proto_len,
3960                               unsigned int *elements)
3961 {
3962         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
3963         const unsigned int contiguous = proto_len ? proto_len : 1;
3964         const unsigned int max_elements = queue->max_elements;
3965         unsigned int __elements;
3966         addr_t start, end;
3967         bool push_ok;
3968         int rc;
3969
3970 check_layout:
3971         start = (addr_t)skb->data - hdr_len;
3972         end = (addr_t)skb->data;
3973
3974         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3975                 /* Push HW header into same page as first protocol header. */
3976                 push_ok = true;
3977                 /* ... but TSO always needs a separate element for headers: */
3978                 if (skb_is_gso(skb))
3979                         __elements = 1 + qeth_count_elements(skb, proto_len);
3980                 else
3981                         __elements = qeth_count_elements(skb, 0);
3982         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3983                 /* Push HW header into preceding page, flush with skb->data. */
3984                 push_ok = true;
3985                 __elements = 1 + qeth_count_elements(skb, 0);
3986         } else {
3987                 /* Use header cache, copy protocol headers up. */
3988                 push_ok = false;
3989                 __elements = 1 + qeth_count_elements(skb, proto_len);
3990         }
3991
3992         /* Compress skb to fit into one IO buffer: */
3993         if (__elements > max_elements) {
3994                 if (!skb_is_nonlinear(skb)) {
3995                         /* Drop it, no easy way of shrinking it further. */
3996                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3997                                          max_elements, __elements, skb->len);
3998                         return -E2BIG;
3999                 }
4000
4001                 rc = skb_linearize(skb);
4002                 if (rc) {
4003                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
4004                         return rc;
4005                 }
4006
4007                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
4008                 /* Linearization changed the layout, re-evaluate: */
4009                 goto check_layout;
4010         }
4011
4012         *elements = __elements;
4013         /* Add the header: */
4014         if (push_ok) {
4015                 *hdr = skb_push(skb, hdr_len);
4016                 return hdr_len;
4017         }
4018
4019         /* Fall back to cache element with known-good alignment: */
4020         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
4021                 return -E2BIG;
4022         *hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
4023         if (!*hdr)
4024                 return -ENOMEM;
4025         /* Copy protocol headers behind HW header: */
4026         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
4027         return 0;
4028 }
4029
4030 static bool qeth_iqd_may_bulk(struct qeth_qdio_out_q *queue,
4031                               struct sk_buff *curr_skb,
4032                               struct qeth_hdr *curr_hdr)
4033 {
4034         struct qeth_qdio_out_buffer *buffer = queue->bufs[queue->bulk_start];
4035         struct qeth_hdr *prev_hdr = queue->prev_hdr;
4036
4037         if (!prev_hdr)
4038                 return true;
4039
4040         /* All packets must have the same target: */
4041         if (curr_hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER2) {
4042                 struct sk_buff *prev_skb = skb_peek(&buffer->skb_list);
4043
4044                 return ether_addr_equal(eth_hdr(prev_skb)->h_dest,
4045                                         eth_hdr(curr_skb)->h_dest) &&
4046                        qeth_l2_same_vlan(&prev_hdr->hdr.l2, &curr_hdr->hdr.l2);
4047         }
4048
4049         return qeth_l3_same_next_hop(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3) &&
4050                qeth_l3_iqd_same_vlan(&prev_hdr->hdr.l3, &curr_hdr->hdr.l3);
4051 }
4052
4053 /**
4054  * qeth_fill_buffer() - map skb into an output buffer
4055  * @buf:        buffer to transport the skb
4056  * @skb:        skb to map into the buffer
4057  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
4058  *              from qeth_core_header_cache.
4059  * @offset:     when mapping the skb, start at skb->data + offset
4060  * @hd_len:     if > 0, build a dedicated header element of this size
4061  */
4062 static unsigned int qeth_fill_buffer(struct qeth_qdio_out_buffer *buf,
4063                                      struct sk_buff *skb, struct qeth_hdr *hdr,
4064                                      unsigned int offset, unsigned int hd_len)
4065 {
4066         struct qdio_buffer *buffer = buf->buffer;
4067         int element = buf->next_element_to_fill;
4068         int length = skb_headlen(skb) - offset;
4069         char *data = skb->data + offset;
4070         unsigned int elem_length, cnt;
4071         bool is_first_elem = true;
4072
4073         __skb_queue_tail(&buf->skb_list, skb);
4074
4075         /* build dedicated element for HW Header */
4076         if (hd_len) {
4077                 is_first_elem = false;
4078
4079                 buffer->element[element].addr = virt_to_dma64(hdr);
4080                 buffer->element[element].length = hd_len;
4081                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
4082
4083                 /* HW header is allocated from cache: */
4084                 if ((void *)hdr != skb->data)
4085                         __set_bit(element, buf->from_kmem_cache);
4086                 /* HW header was pushed and is contiguous with linear part: */
4087                 else if (length > 0 && !PAGE_ALIGNED(data) &&
4088                          (data == (char *)hdr + hd_len))
4089                         buffer->element[element].eflags |=
4090                                 SBAL_EFLAGS_CONTIGUOUS;
4091
4092                 element++;
4093         }
4094
4095         /* map linear part into buffer element(s) */
4096         while (length > 0) {
4097                 elem_length = min_t(unsigned int, length,
4098                                     PAGE_SIZE - offset_in_page(data));
4099
4100                 buffer->element[element].addr = virt_to_dma64(data);
4101                 buffer->element[element].length = elem_length;
4102                 length -= elem_length;
4103                 if (is_first_elem) {
4104                         is_first_elem = false;
4105                         if (length || skb_is_nonlinear(skb))
4106                                 /* skb needs additional elements */
4107                                 buffer->element[element].eflags =
4108                                         SBAL_EFLAGS_FIRST_FRAG;
4109                         else
4110                                 buffer->element[element].eflags = 0;
4111                 } else {
4112                         buffer->element[element].eflags =
4113                                 SBAL_EFLAGS_MIDDLE_FRAG;
4114                 }
4115
4116                 data += elem_length;
4117                 element++;
4118         }
4119
4120         /* map page frags into buffer element(s) */
4121         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
4122                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
4123
4124                 data = skb_frag_address(frag);
4125                 length = skb_frag_size(frag);
4126                 while (length > 0) {
4127                         elem_length = min_t(unsigned int, length,
4128                                             PAGE_SIZE - offset_in_page(data));
4129
4130                         buffer->element[element].addr = virt_to_dma64(data);
4131                         buffer->element[element].length = elem_length;
4132                         buffer->element[element].eflags =
4133                                 SBAL_EFLAGS_MIDDLE_FRAG;
4134
4135                         length -= elem_length;
4136                         data += elem_length;
4137                         element++;
4138                 }
4139         }
4140
4141         if (buffer->element[element - 1].eflags)
4142                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
4143         buf->next_element_to_fill = element;
4144         return element;
4145 }
4146
4147 static int __qeth_xmit(struct qeth_card *card, struct qeth_qdio_out_q *queue,
4148                        struct sk_buff *skb, unsigned int elements,
4149                        struct qeth_hdr *hdr, unsigned int offset,
4150                        unsigned int hd_len)
4151 {
4152         unsigned int bytes = qdisc_pkt_len(skb);
4153         struct qeth_qdio_out_buffer *buffer;
4154         unsigned int next_element;
4155         struct netdev_queue *txq;
4156         bool stopped = false;
4157         bool flush;
4158
4159         buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start + queue->bulk_count)];
4160         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4161
4162         /* Just a sanity check, the wake/stop logic should ensure that we always
4163          * get a free buffer.
4164          */
4165         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4166                 return -EBUSY;
4167
4168         flush = !qeth_iqd_may_bulk(queue, skb, hdr);
4169
4170         if (flush ||
4171             (buffer->next_element_to_fill + elements > queue->max_elements)) {
4172                 if (buffer->next_element_to_fill > 0) {
4173                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4174                         queue->bulk_count++;
4175                 }
4176
4177                 if (queue->bulk_count >= queue->bulk_max)
4178                         flush = true;
4179
4180                 if (flush)
4181                         qeth_flush_queue(queue);
4182
4183                 buffer = queue->bufs[QDIO_BUFNR(queue->bulk_start +
4184                                                 queue->bulk_count)];
4185
4186                 /* Sanity-check again: */
4187                 if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4188                         return -EBUSY;
4189         }
4190
4191         if (buffer->next_element_to_fill == 0 &&
4192             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4193                 /* If a TX completion happens right _here_ and misses to wake
4194                  * the txq, then our re-check below will catch the race.
4195                  */
4196                 QETH_TXQ_STAT_INC(queue, stopped);
4197                 netif_tx_stop_queue(txq);
4198                 stopped = true;
4199         }
4200
4201         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4202         buffer->bytes += bytes;
4203         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4204         queue->prev_hdr = hdr;
4205
4206         flush = __netdev_tx_sent_queue(txq, bytes,
4207                                        !stopped && netdev_xmit_more());
4208
4209         if (flush || next_element >= queue->max_elements) {
4210                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4211                 queue->bulk_count++;
4212
4213                 if (queue->bulk_count >= queue->bulk_max)
4214                         flush = true;
4215
4216                 if (flush)
4217                         qeth_flush_queue(queue);
4218         }
4219
4220         if (stopped && !qeth_out_queue_is_full(queue))
4221                 netif_tx_start_queue(txq);
4222         return 0;
4223 }
4224
4225 static int qeth_do_send_packet(struct qeth_card *card,
4226                                struct qeth_qdio_out_q *queue,
4227                                struct sk_buff *skb, struct qeth_hdr *hdr,
4228                                unsigned int offset, unsigned int hd_len,
4229                                unsigned int elements_needed)
4230 {
4231         unsigned int start_index = queue->next_buf_to_fill;
4232         struct qeth_qdio_out_buffer *buffer;
4233         unsigned int next_element;
4234         struct netdev_queue *txq;
4235         bool stopped = false;
4236         int flush_count = 0;
4237         int do_pack = 0;
4238         int rc = 0;
4239
4240         buffer = queue->bufs[queue->next_buf_to_fill];
4241
4242         /* Just a sanity check, the wake/stop logic should ensure that we always
4243          * get a free buffer.
4244          */
4245         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
4246                 return -EBUSY;
4247
4248         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
4249
4250         /* check if we need to switch packing state of this queue */
4251         qeth_switch_to_packing_if_needed(queue);
4252         if (queue->do_pack) {
4253                 do_pack = 1;
4254                 /* does packet fit in current buffer? */
4255                 if (buffer->next_element_to_fill + elements_needed >
4256                     queue->max_elements) {
4257                         /* ... no -> set state PRIMED */
4258                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4259                         flush_count++;
4260                         queue->next_buf_to_fill =
4261                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4262                         buffer = queue->bufs[queue->next_buf_to_fill];
4263
4264                         /* We stepped forward, so sanity-check again: */
4265                         if (atomic_read(&buffer->state) !=
4266                             QETH_QDIO_BUF_EMPTY) {
4267                                 qeth_flush_buffers(queue, start_index,
4268                                                            flush_count);
4269                                 rc = -EBUSY;
4270                                 goto out;
4271                         }
4272                 }
4273         }
4274
4275         if (buffer->next_element_to_fill == 0 &&
4276             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
4277                 /* If a TX completion happens right _here_ and misses to wake
4278                  * the txq, then our re-check below will catch the race.
4279                  */
4280                 QETH_TXQ_STAT_INC(queue, stopped);
4281                 netif_tx_stop_queue(txq);
4282                 stopped = true;
4283         }
4284
4285         next_element = qeth_fill_buffer(buffer, skb, hdr, offset, hd_len);
4286         buffer->bytes += qdisc_pkt_len(skb);
4287         buffer->frames += skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
4288
4289         if (queue->do_pack)
4290                 QETH_TXQ_STAT_INC(queue, skbs_pack);
4291         if (!queue->do_pack || stopped || next_element >= queue->max_elements) {
4292                 flush_count++;
4293                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4294                 queue->next_buf_to_fill =
4295                                 QDIO_BUFNR(queue->next_buf_to_fill + 1);
4296         }
4297
4298         if (flush_count)
4299                 qeth_flush_buffers(queue, start_index, flush_count);
4300
4301 out:
4302         if (do_pack)
4303                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
4304
4305         if (stopped && !qeth_out_queue_is_full(queue))
4306                 netif_tx_start_queue(txq);
4307         return rc;
4308 }
4309
4310 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
4311                               unsigned int payload_len, struct sk_buff *skb,
4312                               unsigned int proto_len)
4313 {
4314         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4315
4316         ext->hdr_tot_len = sizeof(*ext);
4317         ext->imb_hdr_no = 1;
4318         ext->hdr_type = 1;
4319         ext->hdr_version = 1;
4320         ext->hdr_len = 28;
4321         ext->payload_len = payload_len;
4322         ext->mss = skb_shinfo(skb)->gso_size;
4323         ext->dg_hdr_len = proto_len;
4324 }
4325
4326 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4327               struct qeth_qdio_out_q *queue, __be16 proto,
4328               void (*fill_header)(struct qeth_qdio_out_q *queue,
4329                                   struct qeth_hdr *hdr, struct sk_buff *skb,
4330                                   __be16 proto, unsigned int data_len))
4331 {
4332         unsigned int proto_len, hw_hdr_len;
4333         unsigned int frame_len = skb->len;
4334         bool is_tso = skb_is_gso(skb);
4335         unsigned int data_offset = 0;
4336         struct qeth_hdr *hdr = NULL;
4337         unsigned int hd_len = 0;
4338         unsigned int elements;
4339         int push_len, rc;
4340
4341         if (is_tso) {
4342                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4343                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4344         } else {
4345                 hw_hdr_len = sizeof(struct qeth_hdr);
4346                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
4347         }
4348
4349         rc = skb_cow_head(skb, hw_hdr_len);
4350         if (rc)
4351                 return rc;
4352
4353         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
4354                                       &elements);
4355         if (push_len < 0)
4356                 return push_len;
4357         if (is_tso || !push_len) {
4358                 /* HW header needs its own buffer element. */
4359                 hd_len = hw_hdr_len + proto_len;
4360                 data_offset = push_len + proto_len;
4361         }
4362         memset(hdr, 0, hw_hdr_len);
4363         fill_header(queue, hdr, skb, proto, frame_len);
4364         if (is_tso)
4365                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4366                                   frame_len - proto_len, skb, proto_len);
4367
4368         if (IS_IQD(card)) {
4369                 rc = __qeth_xmit(card, queue, skb, elements, hdr, data_offset,
4370                                  hd_len);
4371         } else {
4372                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4373                 skb_orphan(skb);
4374                 spin_lock(&queue->lock);
4375                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4376                                          hd_len, elements);
4377                 spin_unlock(&queue->lock);
4378         }
4379
4380         if (rc && !push_len)
4381                 kmem_cache_free(qeth_core_header_cache, hdr);
4382
4383         return rc;
4384 }
4385 EXPORT_SYMBOL_GPL(qeth_xmit);
4386
4387 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4388                 struct qeth_reply *reply, unsigned long data)
4389 {
4390         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4391         struct qeth_ipacmd_setadpparms *setparms;
4392
4393         QETH_CARD_TEXT(card, 4, "prmadpcb");
4394
4395         setparms = &(cmd->data.setadapterparms);
4396         if (qeth_setadpparms_inspect_rc(cmd)) {
4397                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4398                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4399         }
4400         card->info.promisc_mode = setparms->data.mode;
4401         return (cmd->hdr.return_code) ? -EIO : 0;
4402 }
4403
4404 void qeth_setadp_promisc_mode(struct qeth_card *card, bool enable)
4405 {
4406         enum qeth_ipa_promisc_modes mode = enable ? SET_PROMISC_MODE_ON :
4407                                                     SET_PROMISC_MODE_OFF;
4408         struct qeth_cmd_buffer *iob;
4409         struct qeth_ipa_cmd *cmd;
4410
4411         QETH_CARD_TEXT(card, 4, "setprom");
4412         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4413
4414         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4415                                    SETADP_DATA_SIZEOF(mode));
4416         if (!iob)
4417                 return;
4418         cmd = __ipa_cmd(iob);
4419         cmd->data.setadapterparms.data.mode = mode;
4420         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4421 }
4422 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4423
4424 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4425                 struct qeth_reply *reply, unsigned long data)
4426 {
4427         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4428         struct qeth_ipacmd_setadpparms *adp_cmd;
4429
4430         QETH_CARD_TEXT(card, 4, "chgmaccb");
4431         if (qeth_setadpparms_inspect_rc(cmd))
4432                 return -EIO;
4433
4434         adp_cmd = &cmd->data.setadapterparms;
4435         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4436                 return -EADDRNOTAVAIL;
4437
4438         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4439             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4440                 return -EADDRNOTAVAIL;
4441
4442         eth_hw_addr_set(card->dev, adp_cmd->data.change_addr.addr);
4443         return 0;
4444 }
4445
4446 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4447 {
4448         int rc;
4449         struct qeth_cmd_buffer *iob;
4450         struct qeth_ipa_cmd *cmd;
4451
4452         QETH_CARD_TEXT(card, 4, "chgmac");
4453
4454         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4455                                    SETADP_DATA_SIZEOF(change_addr));
4456         if (!iob)
4457                 return -ENOMEM;
4458         cmd = __ipa_cmd(iob);
4459         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4460         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4461         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4462                         card->dev->dev_addr);
4463         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4464                                NULL);
4465         return rc;
4466 }
4467 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4468
4469 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4470                 struct qeth_reply *reply, unsigned long data)
4471 {
4472         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4473         struct qeth_set_access_ctrl *access_ctrl_req;
4474
4475         QETH_CARD_TEXT(card, 4, "setaccb");
4476
4477         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4478         QETH_CARD_TEXT_(card, 2, "rc=%d",
4479                         cmd->data.setadapterparms.hdr.return_code);
4480         if (cmd->data.setadapterparms.hdr.return_code !=
4481                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4482                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4483                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4484                                  cmd->data.setadapterparms.hdr.return_code);
4485         switch (qeth_setadpparms_inspect_rc(cmd)) {
4486         case SET_ACCESS_CTRL_RC_SUCCESS:
4487                 if (access_ctrl_req->subcmd_code == ISOLATION_MODE_NONE)
4488                         dev_info(&card->gdev->dev,
4489                             "QDIO data connection isolation is deactivated\n");
4490                 else
4491                         dev_info(&card->gdev->dev,
4492                             "QDIO data connection isolation is activated\n");
4493                 return 0;
4494         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4495                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4496                                  CARD_DEVID(card));
4497                 return 0;
4498         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4499                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4500                                  CARD_DEVID(card));
4501                 return 0;
4502         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4503                 dev_err(&card->gdev->dev, "Adapter does not "
4504                         "support QDIO data connection isolation\n");
4505                 return -EOPNOTSUPP;
4506         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4507                 dev_err(&card->gdev->dev,
4508                         "Adapter is dedicated. "
4509                         "QDIO data connection isolation not supported\n");
4510                 return -EOPNOTSUPP;
4511         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4512                 dev_err(&card->gdev->dev,
4513                         "TSO does not permit QDIO data connection isolation\n");
4514                 return -EPERM;
4515         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4516                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4517                         "support reflective relay mode\n");
4518                 return -EOPNOTSUPP;
4519         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4520                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4521                                         "enabled at the adjacent switch port");
4522                 return -EREMOTEIO;
4523         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4524                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4525                                         "at the adjacent switch failed\n");
4526                 /* benign error while disabling ISOLATION_MODE_FWD */
4527                 return 0;
4528         default:
4529                 return -EIO;
4530         }
4531 }
4532
4533 int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4534                                      enum qeth_ipa_isolation_modes mode)
4535 {
4536         int rc;
4537         struct qeth_cmd_buffer *iob;
4538         struct qeth_ipa_cmd *cmd;
4539         struct qeth_set_access_ctrl *access_ctrl_req;
4540
4541         QETH_CARD_TEXT(card, 4, "setacctl");
4542
4543         if (!qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4544                 dev_err(&card->gdev->dev,
4545                         "Adapter does not support QDIO data connection isolation\n");
4546                 return -EOPNOTSUPP;
4547         }
4548
4549         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4550                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4551         if (!iob)
4552                 return -ENOMEM;
4553         cmd = __ipa_cmd(iob);
4554         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4555         access_ctrl_req->subcmd_code = mode;
4556
4557         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4558                                NULL);
4559         if (rc) {
4560                 QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4561                 QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4562                                  rc, CARD_DEVID(card));
4563         }
4564
4565         return rc;
4566 }
4567
4568 void qeth_tx_timeout(struct net_device *dev, unsigned int txqueue)
4569 {
4570         struct qeth_card *card;
4571
4572         card = dev->ml_priv;
4573         QETH_CARD_TEXT(card, 4, "txtimeo");
4574         qeth_schedule_recovery(card);
4575 }
4576 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4577
4578 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4579 {
4580         struct qeth_card *card = dev->ml_priv;
4581         int rc = 0;
4582
4583         switch (regnum) {
4584         case MII_BMCR: /* Basic mode control register */
4585                 rc = BMCR_FULLDPLX;
4586                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4587                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4588                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4589                         rc |= BMCR_SPEED100;
4590                 break;
4591         case MII_BMSR: /* Basic mode status register */
4592                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4593                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4594                      BMSR_100BASE4;
4595                 break;
4596         case MII_PHYSID1: /* PHYS ID 1 */
4597                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4598                      dev->dev_addr[2];
4599                 rc = (rc >> 5) & 0xFFFF;
4600                 break;
4601         case MII_PHYSID2: /* PHYS ID 2 */
4602                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4603                 break;
4604         case MII_ADVERTISE: /* Advertisement control reg */
4605                 rc = ADVERTISE_ALL;
4606                 break;
4607         case MII_LPA: /* Link partner ability reg */
4608                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4609                      LPA_100BASE4 | LPA_LPACK;
4610                 break;
4611         case MII_EXPANSION: /* Expansion register */
4612                 break;
4613         case MII_DCOUNTER: /* disconnect counter */
4614                 break;
4615         case MII_FCSCOUNTER: /* false carrier counter */
4616                 break;
4617         case MII_NWAYTEST: /* N-way auto-neg test register */
4618                 break;
4619         case MII_RERRCOUNTER: /* rx error counter */
4620                 rc = card->stats.rx_length_errors +
4621                      card->stats.rx_frame_errors +
4622                      card->stats.rx_fifo_errors;
4623                 break;
4624         case MII_SREVISION: /* silicon revision */
4625                 break;
4626         case MII_RESV1: /* reserved 1 */
4627                 break;
4628         case MII_LBRERROR: /* loopback, rx, bypass error */
4629                 break;
4630         case MII_PHYADDR: /* physical address */
4631                 break;
4632         case MII_RESV2: /* reserved 2 */
4633                 break;
4634         case MII_TPISTATUS: /* TPI status for 10mbps */
4635                 break;
4636         case MII_NCONFIG: /* network interface config */
4637                 break;
4638         default:
4639                 break;
4640         }
4641         return rc;
4642 }
4643
4644 static int qeth_snmp_command_cb(struct qeth_card *card,
4645                                 struct qeth_reply *reply, unsigned long data)
4646 {
4647         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4648         struct qeth_arp_query_info *qinfo = reply->param;
4649         struct qeth_ipacmd_setadpparms *adp_cmd;
4650         unsigned int data_len;
4651         void *snmp_data;
4652
4653         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4654
4655         if (cmd->hdr.return_code) {
4656                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4657                 return -EIO;
4658         }
4659         if (cmd->data.setadapterparms.hdr.return_code) {
4660                 cmd->hdr.return_code =
4661                         cmd->data.setadapterparms.hdr.return_code;
4662                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4663                 return -EIO;
4664         }
4665
4666         adp_cmd = &cmd->data.setadapterparms;
4667         data_len = adp_cmd->hdr.cmdlength - sizeof(adp_cmd->hdr);
4668         if (adp_cmd->hdr.seq_no == 1) {
4669                 snmp_data = &adp_cmd->data.snmp;
4670         } else {
4671                 snmp_data = &adp_cmd->data.snmp.request;
4672                 data_len -= offsetof(struct qeth_snmp_cmd, request);
4673         }
4674
4675         /* check if there is enough room in userspace */
4676         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4677                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4678                 return -ENOSPC;
4679         }
4680         QETH_CARD_TEXT_(card, 4, "snore%i",
4681                         cmd->data.setadapterparms.hdr.used_total);
4682         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4683                         cmd->data.setadapterparms.hdr.seq_no);
4684         /*copy entries to user buffer*/
4685         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4686         qinfo->udata_offset += data_len;
4687
4688         if (cmd->data.setadapterparms.hdr.seq_no <
4689             cmd->data.setadapterparms.hdr.used_total)
4690                 return 1;
4691         return 0;
4692 }
4693
4694 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4695 {
4696         struct qeth_snmp_ureq __user *ureq;
4697         struct qeth_cmd_buffer *iob;
4698         unsigned int req_len;
4699         struct qeth_arp_query_info qinfo = {0, };
4700         int rc = 0;
4701
4702         QETH_CARD_TEXT(card, 3, "snmpcmd");
4703
4704         if (IS_VM_NIC(card))
4705                 return -EOPNOTSUPP;
4706
4707         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4708             IS_LAYER3(card))
4709                 return -EOPNOTSUPP;
4710
4711         ureq = (struct qeth_snmp_ureq __user *) udata;
4712         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4713             get_user(req_len, &ureq->hdr.req_len))
4714                 return -EFAULT;
4715
4716         /* Sanitize user input, to avoid overflows in iob size calculation: */
4717         if (req_len > QETH_BUFSIZE)
4718                 return -EINVAL;
4719
4720         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4721         if (!iob)
4722                 return -ENOMEM;
4723
4724         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4725                            &ureq->cmd, req_len)) {
4726                 qeth_put_cmd(iob);
4727                 return -EFAULT;
4728         }
4729
4730         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4731         if (!qinfo.udata) {
4732                 qeth_put_cmd(iob);
4733                 return -ENOMEM;
4734         }
4735         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4736
4737         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4738         if (rc)
4739                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4740                                  CARD_DEVID(card), rc);
4741         else {
4742                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4743                         rc = -EFAULT;
4744         }
4745
4746         kfree(qinfo.udata);
4747         return rc;
4748 }
4749
4750 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4751                                          struct qeth_reply *reply,
4752                                          unsigned long data)
4753 {
4754         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4755         struct qeth_qoat_priv *priv = reply->param;
4756         int resdatalen;
4757
4758         QETH_CARD_TEXT(card, 3, "qoatcb");
4759         if (qeth_setadpparms_inspect_rc(cmd))
4760                 return -EIO;
4761
4762         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4763
4764         if (resdatalen > (priv->buffer_len - priv->response_len))
4765                 return -ENOSPC;
4766
4767         memcpy(priv->buffer + priv->response_len,
4768                &cmd->data.setadapterparms.hdr, resdatalen);
4769         priv->response_len += resdatalen;
4770
4771         if (cmd->data.setadapterparms.hdr.seq_no <
4772             cmd->data.setadapterparms.hdr.used_total)
4773                 return 1;
4774         return 0;
4775 }
4776
4777 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4778 {
4779         int rc = 0;
4780         struct qeth_cmd_buffer *iob;
4781         struct qeth_ipa_cmd *cmd;
4782         struct qeth_query_oat *oat_req;
4783         struct qeth_query_oat_data oat_data;
4784         struct qeth_qoat_priv priv;
4785         void __user *tmp;
4786
4787         QETH_CARD_TEXT(card, 3, "qoatcmd");
4788
4789         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT))
4790                 return -EOPNOTSUPP;
4791
4792         if (copy_from_user(&oat_data, udata, sizeof(oat_data)))
4793                 return -EFAULT;
4794
4795         priv.buffer_len = oat_data.buffer_len;
4796         priv.response_len = 0;
4797         priv.buffer = vzalloc(oat_data.buffer_len);
4798         if (!priv.buffer)
4799                 return -ENOMEM;
4800
4801         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4802                                    SETADP_DATA_SIZEOF(query_oat));
4803         if (!iob) {
4804                 rc = -ENOMEM;
4805                 goto out_free;
4806         }
4807         cmd = __ipa_cmd(iob);
4808         oat_req = &cmd->data.setadapterparms.data.query_oat;
4809         oat_req->subcmd_code = oat_data.command;
4810
4811         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb, &priv);
4812         if (!rc) {
4813                 tmp = is_compat_task() ? compat_ptr(oat_data.ptr) :
4814                                          u64_to_user_ptr(oat_data.ptr);
4815                 oat_data.response_len = priv.response_len;
4816
4817                 if (copy_to_user(tmp, priv.buffer, priv.response_len) ||
4818                     copy_to_user(udata, &oat_data, sizeof(oat_data)))
4819                         rc = -EFAULT;
4820         }
4821
4822 out_free:
4823         vfree(priv.buffer);
4824         return rc;
4825 }
4826
4827 static int qeth_init_link_info_oat_cb(struct qeth_card *card,
4828                                       struct qeth_reply *reply_priv,
4829                                       unsigned long data)
4830 {
4831         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4832         struct qeth_link_info *link_info = reply_priv->param;
4833         struct qeth_query_oat_physical_if *phys_if;
4834         struct qeth_query_oat_reply *reply;
4835
4836         QETH_CARD_TEXT(card, 2, "qoatincb");
4837         if (qeth_setadpparms_inspect_rc(cmd))
4838                 return -EIO;
4839
4840         /* Multi-part reply is unexpected, don't bother: */
4841         if (cmd->data.setadapterparms.hdr.used_total > 1)
4842                 return -EINVAL;
4843
4844         /* Expect the reply to start with phys_if data: */
4845         reply = &cmd->data.setadapterparms.data.query_oat.reply[0];
4846         if (reply->type != QETH_QOAT_REPLY_TYPE_PHYS_IF ||
4847             reply->length < sizeof(*reply))
4848                 return -EINVAL;
4849
4850         phys_if = &reply->phys_if;
4851
4852         switch (phys_if->speed_duplex) {
4853         case QETH_QOAT_PHYS_SPEED_10M_HALF:
4854                 link_info->speed = SPEED_10;
4855                 link_info->duplex = DUPLEX_HALF;
4856                 break;
4857         case QETH_QOAT_PHYS_SPEED_10M_FULL:
4858                 link_info->speed = SPEED_10;
4859                 link_info->duplex = DUPLEX_FULL;
4860                 break;
4861         case QETH_QOAT_PHYS_SPEED_100M_HALF:
4862                 link_info->speed = SPEED_100;
4863                 link_info->duplex = DUPLEX_HALF;
4864                 break;
4865         case QETH_QOAT_PHYS_SPEED_100M_FULL:
4866                 link_info->speed = SPEED_100;
4867                 link_info->duplex = DUPLEX_FULL;
4868                 break;
4869         case QETH_QOAT_PHYS_SPEED_1000M_HALF:
4870                 link_info->speed = SPEED_1000;
4871                 link_info->duplex = DUPLEX_HALF;
4872                 break;
4873         case QETH_QOAT_PHYS_SPEED_1000M_FULL:
4874                 link_info->speed = SPEED_1000;
4875                 link_info->duplex = DUPLEX_FULL;
4876                 break;
4877         case QETH_QOAT_PHYS_SPEED_10G_FULL:
4878                 link_info->speed = SPEED_10000;
4879                 link_info->duplex = DUPLEX_FULL;
4880                 break;
4881         case QETH_QOAT_PHYS_SPEED_25G_FULL:
4882                 link_info->speed = SPEED_25000;
4883                 link_info->duplex = DUPLEX_FULL;
4884                 break;
4885         case QETH_QOAT_PHYS_SPEED_UNKNOWN:
4886         default:
4887                 link_info->speed = SPEED_UNKNOWN;
4888                 link_info->duplex = DUPLEX_UNKNOWN;
4889                 break;
4890         }
4891
4892         switch (phys_if->media_type) {
4893         case QETH_QOAT_PHYS_MEDIA_COPPER:
4894                 link_info->port = PORT_TP;
4895                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4896                 break;
4897         case QETH_QOAT_PHYS_MEDIA_FIBRE_SHORT:
4898                 link_info->port = PORT_FIBRE;
4899                 link_info->link_mode = QETH_LINK_MODE_FIBRE_SHORT;
4900                 break;
4901         case QETH_QOAT_PHYS_MEDIA_FIBRE_LONG:
4902                 link_info->port = PORT_FIBRE;
4903                 link_info->link_mode = QETH_LINK_MODE_FIBRE_LONG;
4904                 break;
4905         default:
4906                 link_info->port = PORT_OTHER;
4907                 link_info->link_mode = QETH_LINK_MODE_UNKNOWN;
4908                 break;
4909         }
4910
4911         return 0;
4912 }
4913
4914 static void qeth_init_link_info(struct qeth_card *card)
4915 {
4916         qeth_default_link_info(card);
4917
4918         /* Get more accurate data via QUERY OAT: */
4919         if (qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4920                 struct qeth_link_info link_info;
4921                 struct qeth_cmd_buffer *iob;
4922
4923                 iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4924                                            SETADP_DATA_SIZEOF(query_oat));
4925                 if (iob) {
4926                         struct qeth_ipa_cmd *cmd = __ipa_cmd(iob);
4927                         struct qeth_query_oat *oat_req;
4928
4929                         oat_req = &cmd->data.setadapterparms.data.query_oat;
4930                         oat_req->subcmd_code = QETH_QOAT_SCOPE_INTERFACE;
4931
4932                         if (!qeth_send_ipa_cmd(card, iob,
4933                                                qeth_init_link_info_oat_cb,
4934                                                &link_info)) {
4935                                 if (link_info.speed != SPEED_UNKNOWN)
4936                                         card->info.link_info.speed = link_info.speed;
4937                                 if (link_info.duplex != DUPLEX_UNKNOWN)
4938                                         card->info.link_info.duplex = link_info.duplex;
4939                                 if (link_info.port != PORT_OTHER)
4940                                         card->info.link_info.port = link_info.port;
4941                                 if (link_info.link_mode != QETH_LINK_MODE_UNKNOWN)
4942                                         card->info.link_info.link_mode = link_info.link_mode;
4943                         }
4944                 }
4945         }
4946 }
4947
4948 /**
4949  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4950  * @card: pointer to a qeth_card
4951  *
4952  * Returns
4953  *      0, if a MAC address has been set for the card's netdevice
4954  *      a return code, for various error conditions
4955  */
4956 int qeth_vm_request_mac(struct qeth_card *card)
4957 {
4958         struct diag26c_mac_resp *response;
4959         struct diag26c_mac_req *request;
4960         int rc;
4961
4962         QETH_CARD_TEXT(card, 2, "vmreqmac");
4963
4964         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4965         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4966         if (!request || !response) {
4967                 rc = -ENOMEM;
4968                 goto out;
4969         }
4970
4971         request->resp_buf_len = sizeof(*response);
4972         request->resp_version = DIAG26C_VERSION2;
4973         request->op_code = DIAG26C_GET_MAC;
4974         request->devno = card->info.ddev_devno;
4975
4976         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4977         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4978         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4979         if (rc)
4980                 goto out;
4981         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4982
4983         if (request->resp_buf_len < sizeof(*response) ||
4984             response->version != request->resp_version) {
4985                 rc = -EIO;
4986                 QETH_CARD_TEXT(card, 2, "badresp");
4987                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4988                               sizeof(request->resp_buf_len));
4989         } else if (!is_valid_ether_addr(response->mac)) {
4990                 rc = -EINVAL;
4991                 QETH_CARD_TEXT(card, 2, "badmac");
4992                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4993         } else {
4994                 eth_hw_addr_set(card->dev, response->mac);
4995         }
4996
4997 out:
4998         kfree(response);
4999         kfree(request);
5000         return rc;
5001 }
5002 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
5003
5004 static void qeth_determine_capabilities(struct qeth_card *card)
5005 {
5006         struct qeth_channel *channel = &card->data;
5007         struct ccw_device *ddev = channel->ccwdev;
5008         int rc;
5009         int ddev_offline = 0;
5010
5011         QETH_CARD_TEXT(card, 2, "detcapab");
5012         if (!ddev->online) {
5013                 ddev_offline = 1;
5014                 rc = qeth_start_channel(channel);
5015                 if (rc) {
5016                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5017                         goto out;
5018                 }
5019         }
5020
5021         rc = qeth_read_conf_data(card);
5022         if (rc) {
5023                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
5024                                  CARD_DEVID(card), rc);
5025                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5026                 goto out_offline;
5027         }
5028
5029         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
5030         if (rc)
5031                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5032
5033         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
5034         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
5035         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
5036         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
5037         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
5038         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
5039             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
5040             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
5041                 dev_info(&card->gdev->dev,
5042                         "Completion Queueing supported\n");
5043         } else {
5044                 card->options.cq = QETH_CQ_NOTAVAILABLE;
5045         }
5046
5047 out_offline:
5048         if (ddev_offline == 1)
5049                 qeth_stop_channel(channel);
5050 out:
5051         return;
5052 }
5053
5054 static void qeth_read_ccw_conf_data(struct qeth_card *card)
5055 {
5056         struct qeth_card_info *info = &card->info;
5057         struct ccw_device *cdev = CARD_DDEV(card);
5058         struct ccw_dev_id dev_id;
5059
5060         QETH_CARD_TEXT(card, 2, "ccwconfd");
5061         ccw_device_get_id(cdev, &dev_id);
5062
5063         info->ddev_devno = dev_id.devno;
5064         info->ids_valid = !ccw_device_get_cssid(cdev, &info->cssid) &&
5065                           !ccw_device_get_iid(cdev, &info->iid) &&
5066                           !ccw_device_get_chid(cdev, 0, &info->chid);
5067         info->ssid = dev_id.ssid;
5068
5069         dev_info(&card->gdev->dev, "CHID: %x CHPID: %x\n",
5070                  info->chid, info->chpid);
5071
5072         QETH_CARD_TEXT_(card, 3, "devn%x", info->ddev_devno);
5073         QETH_CARD_TEXT_(card, 3, "cssid:%x", info->cssid);
5074         QETH_CARD_TEXT_(card, 3, "iid:%x", info->iid);
5075         QETH_CARD_TEXT_(card, 3, "ssid:%x", info->ssid);
5076         QETH_CARD_TEXT_(card, 3, "chpid:%x", info->chpid);
5077         QETH_CARD_TEXT_(card, 3, "chid:%x", info->chid);
5078         QETH_CARD_TEXT_(card, 3, "idval%x", info->ids_valid);
5079 }
5080
5081 static int qeth_qdio_establish(struct qeth_card *card)
5082 {
5083         struct qdio_buffer **out_sbal_ptrs[QETH_MAX_OUT_QUEUES];
5084         struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
5085         struct qeth_qib_parms *qib_parms = NULL;
5086         struct qdio_initialize init_data;
5087         unsigned int no_input_qs = 1;
5088         unsigned int i;
5089         int rc = 0;
5090
5091         QETH_CARD_TEXT(card, 2, "qdioest");
5092
5093         if (!IS_IQD(card) && !IS_VM_NIC(card)) {
5094                 qib_parms = kzalloc(sizeof_field(struct qib, parm), GFP_KERNEL);
5095                 if (!qib_parms)
5096                         return -ENOMEM;
5097
5098                 qeth_fill_qib_parms(card, qib_parms);
5099         }
5100
5101         in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
5102         if (card->options.cq == QETH_CQ_ENABLED) {
5103                 in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
5104                 no_input_qs++;
5105         }
5106
5107         for (i = 0; i < card->qdio.no_out_queues; i++)
5108                 out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
5109
5110         memset(&init_data, 0, sizeof(struct qdio_initialize));
5111         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
5112                                                           QDIO_QETH_QFMT;
5113         init_data.qib_param_field_format = 0;
5114         init_data.qib_param_field        = (void *)qib_parms;
5115         init_data.no_input_qs            = no_input_qs;
5116         init_data.no_output_qs           = card->qdio.no_out_queues;
5117         init_data.input_handler          = qeth_qdio_input_handler;
5118         init_data.output_handler         = qeth_qdio_output_handler;
5119         init_data.irq_poll               = qeth_qdio_poll;
5120         init_data.int_parm               = (unsigned long) card;
5121         init_data.input_sbal_addr_array  = in_sbal_ptrs;
5122         init_data.output_sbal_addr_array = out_sbal_ptrs;
5123
5124         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
5125                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
5126                 rc = qdio_allocate(CARD_DDEV(card), init_data.no_input_qs,
5127                                    init_data.no_output_qs);
5128                 if (rc) {
5129                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5130                         goto out;
5131                 }
5132                 rc = qdio_establish(CARD_DDEV(card), &init_data);
5133                 if (rc) {
5134                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5135                         qdio_free(CARD_DDEV(card));
5136                 }
5137         }
5138
5139         switch (card->options.cq) {
5140         case QETH_CQ_ENABLED:
5141                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5142                 break;
5143         case QETH_CQ_DISABLED:
5144                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5145                 break;
5146         default:
5147                 break;
5148         }
5149
5150 out:
5151         kfree(qib_parms);
5152         return rc;
5153 }
5154
5155 static void qeth_core_free_card(struct qeth_card *card)
5156 {
5157         QETH_CARD_TEXT(card, 2, "freecrd");
5158
5159         unregister_service_level(&card->qeth_service_level);
5160         debugfs_remove_recursive(card->debugfs);
5161         qeth_put_cmd(card->read_cmd);
5162         destroy_workqueue(card->event_wq);
5163         dev_set_drvdata(&card->gdev->dev, NULL);
5164         kfree(card);
5165 }
5166
5167 static void qeth_trace_features(struct qeth_card *card)
5168 {
5169         QETH_CARD_TEXT(card, 2, "features");
5170         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5171         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5172         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5173         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5174                       sizeof(card->info.diagass_support));
5175 }
5176
5177 static struct ccw_device_id qeth_ids[] = {
5178         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5179                                         .driver_info = QETH_CARD_TYPE_OSD},
5180         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5181                                         .driver_info = QETH_CARD_TYPE_IQD},
5182         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5183                                         .driver_info = QETH_CARD_TYPE_OSM},
5184 #ifdef CONFIG_QETH_OSX
5185         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5186                                         .driver_info = QETH_CARD_TYPE_OSX},
5187 #endif
5188         {},
5189 };
5190 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5191
5192 static struct ccw_driver qeth_ccw_driver = {
5193         .driver = {
5194                 .owner = THIS_MODULE,
5195                 .name = "qeth",
5196         },
5197         .ids = qeth_ids,
5198         .probe = ccwgroup_probe_ccwdev,
5199         .remove = ccwgroup_remove_ccwdev,
5200 };
5201
5202 static int qeth_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
5203 {
5204         int retries = 3;
5205         int rc;
5206
5207         QETH_CARD_TEXT(card, 2, "hrdsetup");
5208         atomic_set(&card->force_alloc_skb, 0);
5209         rc = qeth_update_from_chp_desc(card);
5210         if (rc)
5211                 return rc;
5212 retry:
5213         if (retries < 3)
5214                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5215                                  CARD_DEVID(card));
5216         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
5217         qeth_stop_channel(&card->data);
5218         qeth_stop_channel(&card->write);
5219         qeth_stop_channel(&card->read);
5220         qdio_free(CARD_DDEV(card));
5221
5222         rc = qeth_start_channel(&card->read);
5223         if (rc)
5224                 goto retriable;
5225         rc = qeth_start_channel(&card->write);
5226         if (rc)
5227                 goto retriable;
5228         rc = qeth_start_channel(&card->data);
5229         if (rc)
5230                 goto retriable;
5231 retriable:
5232         if (rc == -ERESTARTSYS) {
5233                 QETH_CARD_TEXT(card, 2, "break1");
5234                 return rc;
5235         } else if (rc) {
5236                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5237                 if (--retries < 0)
5238                         goto out;
5239                 else
5240                         goto retry;
5241         }
5242
5243         qeth_determine_capabilities(card);
5244         qeth_read_ccw_conf_data(card);
5245         qeth_idx_init(card);
5246
5247         rc = qeth_idx_activate_read_channel(card);
5248         if (rc == -EINTR) {
5249                 QETH_CARD_TEXT(card, 2, "break2");
5250                 return rc;
5251         } else if (rc) {
5252                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
5253                 if (--retries < 0)
5254                         goto out;
5255                 else
5256                         goto retry;
5257         }
5258
5259         rc = qeth_idx_activate_write_channel(card);
5260         if (rc == -EINTR) {
5261                 QETH_CARD_TEXT(card, 2, "break3");
5262                 return rc;
5263         } else if (rc) {
5264                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
5265                 if (--retries < 0)
5266                         goto out;
5267                 else
5268                         goto retry;
5269         }
5270         card->read_or_write_problem = 0;
5271         rc = qeth_mpc_initialize(card);
5272         if (rc) {
5273                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
5274                 goto out;
5275         }
5276
5277         rc = qeth_send_startlan(card);
5278         if (rc) {
5279                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
5280                 if (rc == -ENETDOWN) {
5281                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
5282                         *carrier_ok = false;
5283                 } else {
5284                         goto out;
5285                 }
5286         } else {
5287                 *carrier_ok = true;
5288         }
5289
5290         card->options.ipa4.supported = 0;
5291         card->options.ipa6.supported = 0;
5292         card->options.adp.supported = 0;
5293         card->options.sbp.supported_funcs = 0;
5294         card->info.diagass_support = 0;
5295         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5296         if (rc == -ENOMEM)
5297                 goto out;
5298         if (qeth_is_supported(card, IPA_IPV6)) {
5299                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5300                 if (rc == -ENOMEM)
5301                         goto out;
5302         }
5303         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5304                 rc = qeth_query_setadapterparms(card);
5305                 if (rc < 0) {
5306                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
5307                         goto out;
5308                 }
5309         }
5310         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5311                 rc = qeth_query_setdiagass(card);
5312                 if (rc)
5313                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
5314         }
5315
5316         qeth_trace_features(card);
5317
5318         if (!qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP) ||
5319             (card->info.hwtrap && qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM)))
5320                 card->info.hwtrap = 0;
5321
5322         if (card->options.isolation != ISOLATION_MODE_NONE) {
5323                 rc = qeth_setadpparms_set_access_ctrl(card,
5324                                                       card->options.isolation);
5325                 if (rc)
5326                         goto out;
5327         }
5328
5329         qeth_init_link_info(card);
5330
5331         rc = qeth_init_qdio_queues(card);
5332         if (rc) {
5333                 QETH_CARD_TEXT_(card, 2, "9err%d", rc);
5334                 goto out;
5335         }
5336
5337         return 0;
5338 out:
5339         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5340                 "an error on the device\n");
5341         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5342                          CARD_DEVID(card), rc);
5343         return rc;
5344 }
5345
5346 static int qeth_set_online(struct qeth_card *card,
5347                            const struct qeth_discipline *disc)
5348 {
5349         bool carrier_ok;
5350         int rc;
5351
5352         mutex_lock(&card->conf_mutex);
5353         QETH_CARD_TEXT(card, 2, "setonlin");
5354
5355         rc = qeth_hardsetup_card(card, &carrier_ok);
5356         if (rc) {
5357                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
5358                 rc = -ENODEV;
5359                 goto err_hardsetup;
5360         }
5361
5362         qeth_print_status_message(card);
5363
5364         if (card->dev->reg_state != NETREG_REGISTERED)
5365                 /* no need for locking / error handling at this early stage: */
5366                 qeth_set_real_num_tx_queues(card, qeth_tx_actual_queues(card));
5367
5368         rc = disc->set_online(card, carrier_ok);
5369         if (rc)
5370                 goto err_online;
5371
5372         /* let user_space know that device is online */
5373         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5374
5375         mutex_unlock(&card->conf_mutex);
5376         return 0;
5377
5378 err_online:
5379 err_hardsetup:
5380         qeth_qdio_clear_card(card, 0);
5381         qeth_clear_working_pool_list(card);
5382         qeth_flush_local_addrs(card);
5383
5384         qeth_stop_channel(&card->data);
5385         qeth_stop_channel(&card->write);
5386         qeth_stop_channel(&card->read);
5387         qdio_free(CARD_DDEV(card));
5388
5389         mutex_unlock(&card->conf_mutex);
5390         return rc;
5391 }
5392
5393 int qeth_set_offline(struct qeth_card *card, const struct qeth_discipline *disc,
5394                      bool resetting)
5395 {
5396         int rc, rc2, rc3;
5397
5398         mutex_lock(&card->conf_mutex);
5399         QETH_CARD_TEXT(card, 3, "setoffl");
5400
5401         if ((!resetting && card->info.hwtrap) || card->info.hwtrap == 2) {
5402                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5403                 card->info.hwtrap = 1;
5404         }
5405
5406         /* cancel any stalled cmd that might block the rtnl: */
5407         qeth_clear_ipacmd_list(card);
5408
5409         rtnl_lock();
5410         netif_device_detach(card->dev);
5411         netif_carrier_off(card->dev);
5412         rtnl_unlock();
5413
5414         cancel_work_sync(&card->rx_mode_work);
5415
5416         disc->set_offline(card);
5417
5418         qeth_qdio_clear_card(card, 0);
5419         qeth_drain_output_queues(card);
5420         qeth_clear_working_pool_list(card);
5421         qeth_flush_local_addrs(card);
5422         card->info.promisc_mode = 0;
5423         qeth_default_link_info(card);
5424
5425         rc  = qeth_stop_channel(&card->data);
5426         rc2 = qeth_stop_channel(&card->write);
5427         rc3 = qeth_stop_channel(&card->read);
5428         if (!rc)
5429                 rc = (rc2) ? rc2 : rc3;
5430         if (rc)
5431                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
5432         qdio_free(CARD_DDEV(card));
5433
5434         /* let user_space know that device is offline */
5435         kobject_uevent(&card->gdev->dev.kobj, KOBJ_CHANGE);
5436
5437         mutex_unlock(&card->conf_mutex);
5438         return 0;
5439 }
5440 EXPORT_SYMBOL_GPL(qeth_set_offline);
5441
5442 static int qeth_do_reset(void *data)
5443 {
5444         const struct qeth_discipline *disc;
5445         struct qeth_card *card = data;
5446         int rc;
5447
5448         /* Lock-free, other users will block until we are done. */
5449         disc = card->discipline;
5450
5451         QETH_CARD_TEXT(card, 2, "recover1");
5452         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
5453                 return 0;
5454         QETH_CARD_TEXT(card, 2, "recover2");
5455         dev_warn(&card->gdev->dev,
5456                  "A recovery process has been started for the device\n");
5457
5458         qeth_set_offline(card, disc, true);
5459         rc = qeth_set_online(card, disc);
5460         if (!rc) {
5461                 dev_info(&card->gdev->dev,
5462                          "Device successfully recovered!\n");
5463         } else {
5464                 qeth_set_offline(card, disc, true);
5465                 ccwgroup_set_offline(card->gdev, false);
5466                 dev_warn(&card->gdev->dev,
5467                          "The qeth device driver failed to recover an error on the device\n");
5468         }
5469         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
5470         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
5471         return 0;
5472 }
5473
5474 #if IS_ENABLED(CONFIG_QETH_L3)
5475 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
5476                                 struct qeth_hdr *hdr)
5477 {
5478         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
5479         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
5480         struct net_device *dev = skb->dev;
5481
5482         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
5483                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
5484                                 "FAKELL", skb->len);
5485                 return;
5486         }
5487
5488         if (!(l3_hdr->flags & QETH_HDR_PASSTHRU)) {
5489                 u16 prot = (l3_hdr->flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
5490                                                              ETH_P_IP;
5491                 unsigned char tg_addr[ETH_ALEN];
5492
5493                 skb_reset_network_header(skb);
5494                 switch (l3_hdr->flags & QETH_HDR_CAST_MASK) {
5495                 case QETH_CAST_MULTICAST:
5496                         if (prot == ETH_P_IP)
5497                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
5498                         else
5499                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
5500                         QETH_CARD_STAT_INC(card, rx_multicast);
5501                         break;
5502                 case QETH_CAST_BROADCAST:
5503                         ether_addr_copy(tg_addr, dev->broadcast);
5504                         QETH_CARD_STAT_INC(card, rx_multicast);
5505                         break;
5506                 default:
5507                         if (card->options.sniffer)
5508                                 skb->pkt_type = PACKET_OTHERHOST;
5509                         ether_addr_copy(tg_addr, dev->dev_addr);
5510                 }
5511
5512                 if (l3_hdr->ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
5513                         dev_hard_header(skb, dev, prot, tg_addr,
5514                                         &l3_hdr->next_hop.rx.src_mac, skb->len);
5515                 else
5516                         dev_hard_header(skb, dev, prot, tg_addr, "FAKELL",
5517                                         skb->len);
5518         }
5519
5520         /* copy VLAN tag from hdr into skb */
5521         if (!card->options.sniffer &&
5522             (l3_hdr->ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
5523                                   QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
5524                 u16 tag = (l3_hdr->ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
5525                                 l3_hdr->vlan_id :
5526                                 l3_hdr->next_hop.rx.vlan_id;
5527
5528                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
5529         }
5530 }
5531 #endif
5532
5533 static void qeth_receive_skb(struct qeth_card *card, struct sk_buff *skb,
5534                              bool uses_frags, bool is_cso)
5535 {
5536         struct napi_struct *napi = &card->napi;
5537
5538         if (is_cso && (card->dev->features & NETIF_F_RXCSUM)) {
5539                 skb->ip_summed = CHECKSUM_UNNECESSARY;
5540                 QETH_CARD_STAT_INC(card, rx_skb_csum);
5541         } else {
5542                 skb->ip_summed = CHECKSUM_NONE;
5543         }
5544
5545         QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
5546         QETH_CARD_STAT_INC(card, rx_packets);
5547         if (skb_is_nonlinear(skb)) {
5548                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5549                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5550                                    skb_shinfo(skb)->nr_frags);
5551         }
5552
5553         if (uses_frags) {
5554                 napi_gro_frags(napi);
5555         } else {
5556                 skb->protocol = eth_type_trans(skb, skb->dev);
5557                 napi_gro_receive(napi, skb);
5558         }
5559 }
5560
5561 static void qeth_create_skb_frag(struct sk_buff *skb, char *data, int data_len)
5562 {
5563         struct page *page = virt_to_page(data);
5564         unsigned int next_frag;
5565
5566         next_frag = skb_shinfo(skb)->nr_frags;
5567         get_page(page);
5568         skb_add_rx_frag(skb, next_frag, page, offset_in_page(data), data_len,
5569                         data_len);
5570 }
5571
5572 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5573 {
5574         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5575 }
5576
5577 static int qeth_extract_skb(struct qeth_card *card,
5578                             struct qeth_qdio_buffer *qethbuffer, u8 *element_no,
5579                             int *__offset)
5580 {
5581         struct qeth_priv *priv = netdev_priv(card->dev);
5582         struct qdio_buffer *buffer = qethbuffer->buffer;
5583         struct napi_struct *napi = &card->napi;
5584         struct qdio_buffer_element *element;
5585         unsigned int linear_len = 0;
5586         bool uses_frags = false;
5587         int offset = *__offset;
5588         bool use_rx_sg = false;
5589         unsigned int headroom;
5590         struct qeth_hdr *hdr;
5591         struct sk_buff *skb;
5592         int skb_len = 0;
5593         bool is_cso;
5594
5595         element = &buffer->element[*element_no];
5596
5597 next_packet:
5598         /* qeth_hdr must not cross element boundaries */
5599         while (element->length < offset + sizeof(struct qeth_hdr)) {
5600                 if (qeth_is_last_sbale(element))
5601                         return -ENODATA;
5602                 element++;
5603                 offset = 0;
5604         }
5605
5606         hdr = dma64_to_virt(element->addr) + offset;
5607         offset += sizeof(*hdr);
5608         skb = NULL;
5609
5610         switch (hdr->hdr.l2.id) {
5611         case QETH_HEADER_TYPE_LAYER2:
5612                 skb_len = hdr->hdr.l2.pkt_length;
5613                 is_cso = hdr->hdr.l2.flags[1] & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5614
5615                 linear_len = ETH_HLEN;
5616                 headroom = 0;
5617                 break;
5618         case QETH_HEADER_TYPE_LAYER3:
5619                 skb_len = hdr->hdr.l3.length;
5620                 is_cso = hdr->hdr.l3.ext_flags & QETH_HDR_EXT_CSUM_TRANSP_REQ;
5621
5622                 if (!IS_LAYER3(card)) {
5623                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5624                         goto walk_packet;
5625                 }
5626
5627                 if (hdr->hdr.l3.flags & QETH_HDR_PASSTHRU) {
5628                         linear_len = ETH_HLEN;
5629                         headroom = 0;
5630                         break;
5631                 }
5632
5633                 if (hdr->hdr.l3.flags & QETH_HDR_IPV6)
5634                         linear_len = sizeof(struct ipv6hdr);
5635                 else
5636                         linear_len = sizeof(struct iphdr);
5637                 headroom = ETH_HLEN;
5638                 break;
5639         default:
5640                 if (hdr->hdr.l2.id & QETH_HEADER_MASK_INVAL)
5641                         QETH_CARD_STAT_INC(card, rx_frame_errors);
5642                 else
5643                         QETH_CARD_STAT_INC(card, rx_dropped_notsupp);
5644
5645                 /* Can't determine packet length, drop the whole buffer. */
5646                 return -EPROTONOSUPPORT;
5647         }
5648
5649         if (skb_len < linear_len) {
5650                 QETH_CARD_STAT_INC(card, rx_dropped_runt);
5651                 goto walk_packet;
5652         }
5653
5654         use_rx_sg = (card->options.cq == QETH_CQ_ENABLED) ||
5655                     (skb_len > READ_ONCE(priv->rx_copybreak) &&
5656                      !atomic_read(&card->force_alloc_skb));
5657
5658         if (use_rx_sg) {
5659                 /* QETH_CQ_ENABLED only: */
5660                 if (qethbuffer->rx_skb &&
5661                     skb_tailroom(qethbuffer->rx_skb) >= linear_len + headroom) {
5662                         skb = qethbuffer->rx_skb;
5663                         qethbuffer->rx_skb = NULL;
5664                         goto use_skb;
5665                 }
5666
5667                 skb = napi_get_frags(napi);
5668                 if (!skb) {
5669                         /* -ENOMEM, no point in falling back further. */
5670                         QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5671                         goto walk_packet;
5672                 }
5673
5674                 if (skb_tailroom(skb) >= linear_len + headroom) {
5675                         uses_frags = true;
5676                         goto use_skb;
5677                 }
5678
5679                 netdev_info_once(card->dev,
5680                                  "Insufficient linear space in NAPI frags skb, need %u but have %u\n",
5681                                  linear_len + headroom, skb_tailroom(skb));
5682                 /* Shouldn't happen. Don't optimize, fall back to linear skb. */
5683         }
5684
5685         linear_len = skb_len;
5686         skb = napi_alloc_skb(napi, linear_len + headroom);
5687         if (!skb) {
5688                 QETH_CARD_STAT_INC(card, rx_dropped_nomem);
5689                 goto walk_packet;
5690         }
5691
5692 use_skb:
5693         if (headroom)
5694                 skb_reserve(skb, headroom);
5695 walk_packet:
5696         while (skb_len) {
5697                 int data_len = min(skb_len, (int)(element->length - offset));
5698                 char *data = dma64_to_virt(element->addr) + offset;
5699
5700                 skb_len -= data_len;
5701                 offset += data_len;
5702
5703                 /* Extract data from current element: */
5704                 if (skb && data_len) {
5705                         if (linear_len) {
5706                                 unsigned int copy_len;
5707
5708                                 copy_len = min_t(unsigned int, linear_len,
5709                                                  data_len);
5710
5711                                 skb_put_data(skb, data, copy_len);
5712                                 linear_len -= copy_len;
5713                                 data_len -= copy_len;
5714                                 data += copy_len;
5715                         }
5716
5717                         if (data_len)
5718                                 qeth_create_skb_frag(skb, data, data_len);
5719                 }
5720
5721                 /* Step forward to next element: */
5722                 if (skb_len) {
5723                         if (qeth_is_last_sbale(element)) {
5724                                 QETH_CARD_TEXT(card, 4, "unexeob");
5725                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5726                                 if (skb) {
5727                                         if (uses_frags)
5728                                                 napi_free_frags(napi);
5729                                         else
5730                                                 kfree_skb(skb);
5731                                         QETH_CARD_STAT_INC(card,
5732                                                            rx_length_errors);
5733                                 }
5734                                 return -EMSGSIZE;
5735                         }
5736                         element++;
5737                         offset = 0;
5738                 }
5739         }
5740
5741         /* This packet was skipped, go get another one: */
5742         if (!skb)
5743                 goto next_packet;
5744
5745         *element_no = element - &buffer->element[0];
5746         *__offset = offset;
5747
5748 #if IS_ENABLED(CONFIG_QETH_L3)
5749         if (hdr->hdr.l2.id == QETH_HEADER_TYPE_LAYER3)
5750                 qeth_l3_rebuild_skb(card, skb, hdr);
5751 #endif
5752
5753         qeth_receive_skb(card, skb, uses_frags, is_cso);
5754         return 0;
5755 }
5756
5757 static unsigned int qeth_extract_skbs(struct qeth_card *card, int budget,
5758                                       struct qeth_qdio_buffer *buf, bool *done)
5759 {
5760         unsigned int work_done = 0;
5761
5762         while (budget) {
5763                 if (qeth_extract_skb(card, buf, &card->rx.buf_element,
5764                                      &card->rx.e_offset)) {
5765                         *done = true;
5766                         break;
5767                 }
5768
5769                 work_done++;
5770                 budget--;
5771         }
5772
5773         return work_done;
5774 }
5775
5776 static unsigned int qeth_rx_poll(struct qeth_card *card, int budget)
5777 {
5778         struct qeth_rx *ctx = &card->rx;
5779         unsigned int work_done = 0;
5780
5781         while (budget > 0) {
5782                 struct qeth_qdio_buffer *buffer;
5783                 unsigned int skbs_done = 0;
5784                 bool done = false;
5785
5786                 /* Fetch completed RX buffers: */
5787                 if (!card->rx.b_count) {
5788                         card->rx.qdio_err = 0;
5789                         card->rx.b_count =
5790                                 qdio_inspect_input_queue(CARD_DDEV(card), 0,
5791                                                          &card->rx.b_index,
5792                                                          &card->rx.qdio_err);
5793                         if (card->rx.b_count <= 0) {
5794                                 card->rx.b_count = 0;
5795                                 break;
5796                         }
5797                 }
5798
5799                 /* Process one completed RX buffer: */
5800                 buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5801                 if (!(card->rx.qdio_err &&
5802                       qeth_check_qdio_errors(card, buffer->buffer,
5803                                              card->rx.qdio_err, "qinerr")))
5804                         skbs_done = qeth_extract_skbs(card, budget, buffer,
5805                                                       &done);
5806                 else
5807                         done = true;
5808
5809                 work_done += skbs_done;
5810                 budget -= skbs_done;
5811
5812                 if (done) {
5813                         QETH_CARD_STAT_INC(card, rx_bufs);
5814                         qeth_put_buffer_pool_entry(card, buffer->pool_entry);
5815                         buffer->pool_entry = NULL;
5816                         card->rx.b_count--;
5817                         ctx->bufs_refill++;
5818                         ctx->bufs_refill -= qeth_rx_refill_queue(card,
5819                                                                  ctx->bufs_refill);
5820
5821                         /* Step forward to next buffer: */
5822                         card->rx.b_index = QDIO_BUFNR(card->rx.b_index + 1);
5823                         card->rx.buf_element = 0;
5824                         card->rx.e_offset = 0;
5825                 }
5826         }
5827
5828         return work_done;
5829 }
5830
5831 static void qeth_cq_poll(struct qeth_card *card)
5832 {
5833         unsigned int work_done = 0;
5834
5835         while (work_done < QDIO_MAX_BUFFERS_PER_Q) {
5836                 unsigned int start, error;
5837                 int completed;
5838
5839                 completed = qdio_inspect_input_queue(CARD_DDEV(card), 1, &start,
5840                                                      &error);
5841                 if (completed <= 0)
5842                         return;
5843
5844                 qeth_qdio_cq_handler(card, error, 1, start, completed);
5845                 work_done += completed;
5846         }
5847 }
5848
5849 int qeth_poll(struct napi_struct *napi, int budget)
5850 {
5851         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5852         unsigned int work_done;
5853
5854         work_done = qeth_rx_poll(card, budget);
5855
5856         if (qeth_use_tx_irqs(card)) {
5857                 struct qeth_qdio_out_q *queue;
5858                 unsigned int i;
5859
5860                 qeth_for_each_output_queue(card, queue, i) {
5861                         if (!qeth_out_queue_is_empty(queue))
5862                                 napi_schedule(&queue->napi);
5863                 }
5864         }
5865
5866         if (card->options.cq == QETH_CQ_ENABLED)
5867                 qeth_cq_poll(card);
5868
5869         if (budget) {
5870                 struct qeth_rx *ctx = &card->rx;
5871
5872                 /* Process any substantial refill backlog: */
5873                 ctx->bufs_refill -= qeth_rx_refill_queue(card, ctx->bufs_refill);
5874
5875                 /* Exhausted the RX budget. Keep IRQ disabled, we get called again. */
5876                 if (work_done >= budget)
5877                         return work_done;
5878         }
5879
5880         if (napi_complete_done(napi, work_done) &&
5881             qdio_start_irq(CARD_DDEV(card)))
5882                 napi_schedule(napi);
5883
5884         return work_done;
5885 }
5886 EXPORT_SYMBOL_GPL(qeth_poll);
5887
5888 static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
5889                                  unsigned int bidx, unsigned int qdio_error,
5890                                  int budget)
5891 {
5892         struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
5893         u8 sflags = buffer->buffer->element[15].sflags;
5894         struct qeth_card *card = queue->card;
5895         bool error = !!qdio_error;
5896
5897         if (qdio_error == QDIO_ERROR_SLSB_PENDING) {
5898                 struct qaob *aob = buffer->aob;
5899                 struct qeth_qaob_priv1 *priv;
5900                 enum iucv_tx_notify notify;
5901
5902                 if (!aob) {
5903                         netdev_WARN_ONCE(card->dev,
5904                                          "Pending TX buffer %#x without QAOB on TX queue %u\n",
5905                                          bidx, queue->queue_no);
5906                         qeth_schedule_recovery(card);
5907                         return;
5908                 }
5909
5910                 QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
5911
5912                 priv = (struct qeth_qaob_priv1 *)&aob->user1;
5913                 /* QAOB hasn't completed yet: */
5914                 if (xchg(&priv->state, QETH_QAOB_PENDING) != QETH_QAOB_DONE) {
5915                         qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
5916
5917                         /* Prepare the queue slot for immediate re-use: */
5918                         qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
5919                         if (qeth_alloc_out_buf(queue, bidx, GFP_ATOMIC)) {
5920                                 QETH_CARD_TEXT(card, 2, "outofbuf");
5921                                 qeth_schedule_recovery(card);
5922                         }
5923
5924                         list_add(&buffer->list_entry, &queue->pending_bufs);
5925                         /* Skip clearing the buffer: */
5926                         return;
5927                 }
5928
5929                 /* QAOB already completed: */
5930                 notify = qeth_compute_cq_notification(aob->aorc, 0);
5931                 qeth_notify_skbs(queue, buffer, notify);
5932                 error = !!aob->aorc;
5933                 memset(aob, 0, sizeof(*aob));
5934         } else if (card->options.cq == QETH_CQ_ENABLED) {
5935                 qeth_notify_skbs(queue, buffer,
5936                                  qeth_compute_cq_notification(sflags, 0));
5937         }
5938
5939         qeth_clear_output_buffer(queue, buffer, error, budget);
5940 }
5941
5942 static int qeth_tx_poll(struct napi_struct *napi, int budget)
5943 {
5944         struct qeth_qdio_out_q *queue = qeth_napi_to_out_queue(napi);
5945         unsigned int queue_no = queue->queue_no;
5946         struct qeth_card *card = queue->card;
5947         struct net_device *dev = card->dev;
5948         unsigned int work_done = 0;
5949         struct netdev_queue *txq;
5950
5951         if (IS_IQD(card))
5952                 txq = netdev_get_tx_queue(dev, qeth_iqd_translate_txq(dev, queue_no));
5953         else
5954                 txq = netdev_get_tx_queue(dev, queue_no);
5955
5956         while (1) {
5957                 unsigned int start, error, i;
5958                 unsigned int packets = 0;
5959                 unsigned int bytes = 0;
5960                 int completed;
5961
5962                 qeth_tx_complete_pending_bufs(card, queue, false, budget);
5963
5964                 if (qeth_out_queue_is_empty(queue)) {
5965                         napi_complete(napi);
5966                         return 0;
5967                 }
5968
5969                 /* Give the CPU a breather: */
5970                 if (work_done >= QDIO_MAX_BUFFERS_PER_Q) {
5971                         QETH_TXQ_STAT_INC(queue, completion_yield);
5972                         if (napi_complete_done(napi, 0))
5973                                 napi_schedule(napi);
5974                         return 0;
5975                 }
5976
5977                 completed = qdio_inspect_output_queue(CARD_DDEV(card), queue_no,
5978                                                       &start, &error);
5979                 if (completed <= 0) {
5980                         /* Ensure we see TX completion for pending work: */
5981                         if (napi_complete_done(napi, 0) &&
5982                             !atomic_read(&queue->set_pci_flags_count))
5983                                 qeth_tx_arm_timer(queue, queue->rescan_usecs);
5984                         return 0;
5985                 }
5986
5987                 for (i = start; i < start + completed; i++) {
5988                         struct qeth_qdio_out_buffer *buffer;
5989                         unsigned int bidx = QDIO_BUFNR(i);
5990
5991                         buffer = queue->bufs[bidx];
5992                         packets += buffer->frames;
5993                         bytes += buffer->bytes;
5994
5995                         qeth_handle_send_error(card, buffer, error);
5996                         if (IS_IQD(card))
5997                                 qeth_iqd_tx_complete(queue, bidx, error, budget);
5998                         else
5999                                 qeth_clear_output_buffer(queue, buffer, error,
6000                                                          budget);
6001                 }
6002
6003                 atomic_sub(completed, &queue->used_buffers);
6004                 work_done += completed;
6005                 if (IS_IQD(card))
6006                         netdev_tx_completed_queue(txq, packets, bytes);
6007                 else
6008                         qeth_check_outbound_queue(queue);
6009
6010                 /* xmit may have observed the full-condition, but not yet
6011                  * stopped the txq. In which case the code below won't trigger.
6012                  * So before returning, xmit will re-check the txq's fill level
6013                  * and wake it up if needed.
6014                  */
6015                 if (netif_tx_queue_stopped(txq) &&
6016                     !qeth_out_queue_is_full(queue))
6017                         netif_tx_wake_queue(txq);
6018         }
6019 }
6020
6021 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
6022 {
6023         if (!cmd->hdr.return_code)
6024                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6025         return cmd->hdr.return_code;
6026 }
6027
6028 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
6029                                         struct qeth_reply *reply,
6030                                         unsigned long data)
6031 {
6032         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6033         struct qeth_ipa_caps *caps = reply->param;
6034
6035         if (qeth_setassparms_inspect_rc(cmd))
6036                 return -EIO;
6037
6038         caps->supported = cmd->data.setassparms.data.caps.supported;
6039         caps->enabled = cmd->data.setassparms.data.caps.enabled;
6040         return 0;
6041 }
6042
6043 int qeth_setassparms_cb(struct qeth_card *card,
6044                         struct qeth_reply *reply, unsigned long data)
6045 {
6046         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6047
6048         QETH_CARD_TEXT(card, 4, "defadpcb");
6049
6050         if (cmd->hdr.return_code)
6051                 return -EIO;
6052
6053         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
6054         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
6055                 card->options.ipa4.enabled = cmd->hdr.assists.enabled;
6056         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
6057                 card->options.ipa6.enabled = cmd->hdr.assists.enabled;
6058         return 0;
6059 }
6060 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
6061
6062 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
6063                                                  enum qeth_ipa_funcs ipa_func,
6064                                                  u16 cmd_code,
6065                                                  unsigned int data_length,
6066                                                  enum qeth_prot_versions prot)
6067 {
6068         struct qeth_ipacmd_setassparms *setassparms;
6069         struct qeth_ipacmd_setassparms_hdr *hdr;
6070         struct qeth_cmd_buffer *iob;
6071
6072         QETH_CARD_TEXT(card, 4, "getasscm");
6073         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
6074                                  data_length +
6075                                  offsetof(struct qeth_ipacmd_setassparms,
6076                                           data));
6077         if (!iob)
6078                 return NULL;
6079
6080         setassparms = &__ipa_cmd(iob)->data.setassparms;
6081         setassparms->assist_no = ipa_func;
6082
6083         hdr = &setassparms->hdr;
6084         hdr->length = sizeof(*hdr) + data_length;
6085         hdr->command_code = cmd_code;
6086         return iob;
6087 }
6088 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
6089
6090 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
6091                                       enum qeth_ipa_funcs ipa_func,
6092                                       u16 cmd_code, u32 *data,
6093                                       enum qeth_prot_versions prot)
6094 {
6095         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
6096         struct qeth_cmd_buffer *iob;
6097
6098         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
6099         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
6100         if (!iob)
6101                 return -ENOMEM;
6102
6103         if (data)
6104                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
6105         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
6106 }
6107 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
6108
6109 static void qeth_unregister_dbf_views(void)
6110 {
6111         int x;
6112
6113         for (x = 0; x < QETH_DBF_INFOS; x++) {
6114                 debug_unregister(qeth_dbf[x].id);
6115                 qeth_dbf[x].id = NULL;
6116         }
6117 }
6118
6119 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
6120 {
6121         char dbf_txt_buf[32];
6122         va_list args;
6123
6124         if (!debug_level_enabled(id, level))
6125                 return;
6126         va_start(args, fmt);
6127         vscnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
6128         va_end(args);
6129         debug_text_event(id, level, dbf_txt_buf);
6130 }
6131 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
6132
6133 static int qeth_register_dbf_views(void)
6134 {
6135         int ret;
6136         int x;
6137
6138         for (x = 0; x < QETH_DBF_INFOS; x++) {
6139                 /* register the areas */
6140                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
6141                                                 qeth_dbf[x].pages,
6142                                                 qeth_dbf[x].areas,
6143                                                 qeth_dbf[x].len);
6144                 if (qeth_dbf[x].id == NULL) {
6145                         qeth_unregister_dbf_views();
6146                         return -ENOMEM;
6147                 }
6148
6149                 /* register a view */
6150                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
6151                 if (ret) {
6152                         qeth_unregister_dbf_views();
6153                         return ret;
6154                 }
6155
6156                 /* set a passing level */
6157                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
6158         }
6159
6160         return 0;
6161 }
6162
6163 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
6164
6165 int qeth_setup_discipline(struct qeth_card *card,
6166                           enum qeth_discipline_id discipline)
6167 {
6168         int rc;
6169
6170         mutex_lock(&qeth_mod_mutex);
6171         switch (discipline) {
6172         case QETH_DISCIPLINE_LAYER3:
6173                 card->discipline = try_then_request_module(
6174                         symbol_get(qeth_l3_discipline), "qeth_l3");
6175                 break;
6176         case QETH_DISCIPLINE_LAYER2:
6177                 card->discipline = try_then_request_module(
6178                         symbol_get(qeth_l2_discipline), "qeth_l2");
6179                 break;
6180         default:
6181                 break;
6182         }
6183         mutex_unlock(&qeth_mod_mutex);
6184
6185         if (!card->discipline) {
6186                 dev_err(&card->gdev->dev, "There is no kernel module to "
6187                         "support discipline %d\n", discipline);
6188                 return -EINVAL;
6189         }
6190
6191         rc = card->discipline->setup(card->gdev);
6192         if (rc) {
6193                 if (discipline == QETH_DISCIPLINE_LAYER2)
6194                         symbol_put(qeth_l2_discipline);
6195                 else
6196                         symbol_put(qeth_l3_discipline);
6197                 card->discipline = NULL;
6198
6199                 return rc;
6200         }
6201
6202         card->options.layer = discipline;
6203         return 0;
6204 }
6205
6206 void qeth_remove_discipline(struct qeth_card *card)
6207 {
6208         card->discipline->remove(card->gdev);
6209
6210         if (IS_LAYER2(card))
6211                 symbol_put(qeth_l2_discipline);
6212         else
6213                 symbol_put(qeth_l3_discipline);
6214         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
6215         card->discipline = NULL;
6216 }
6217
6218 static const struct device_type qeth_generic_devtype = {
6219         .name = "qeth_generic",
6220 };
6221
6222 #define DBF_NAME_LEN    20
6223
6224 struct qeth_dbf_entry {
6225         char dbf_name[DBF_NAME_LEN];
6226         debug_info_t *dbf_info;
6227         struct list_head dbf_list;
6228 };
6229
6230 static LIST_HEAD(qeth_dbf_list);
6231 static DEFINE_MUTEX(qeth_dbf_list_mutex);
6232
6233 static debug_info_t *qeth_get_dbf_entry(char *name)
6234 {
6235         struct qeth_dbf_entry *entry;
6236         debug_info_t *rc = NULL;
6237
6238         mutex_lock(&qeth_dbf_list_mutex);
6239         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
6240                 if (strcmp(entry->dbf_name, name) == 0) {
6241                         rc = entry->dbf_info;
6242                         break;
6243                 }
6244         }
6245         mutex_unlock(&qeth_dbf_list_mutex);
6246         return rc;
6247 }
6248
6249 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
6250 {
6251         struct qeth_dbf_entry *new_entry;
6252
6253         card->debug = debug_register(name, 2, 1, 8);
6254         if (!card->debug) {
6255                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
6256                 goto err;
6257         }
6258         if (debug_register_view(card->debug, &debug_hex_ascii_view))
6259                 goto err_dbg;
6260         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
6261         if (!new_entry)
6262                 goto err_dbg;
6263         strscpy(new_entry->dbf_name, name, sizeof(new_entry->dbf_name));
6264         new_entry->dbf_info = card->debug;
6265         mutex_lock(&qeth_dbf_list_mutex);
6266         list_add(&new_entry->dbf_list, &qeth_dbf_list);
6267         mutex_unlock(&qeth_dbf_list_mutex);
6268
6269         return 0;
6270
6271 err_dbg:
6272         debug_unregister(card->debug);
6273 err:
6274         return -ENOMEM;
6275 }
6276
6277 static void qeth_clear_dbf_list(void)
6278 {
6279         struct qeth_dbf_entry *entry, *tmp;
6280
6281         mutex_lock(&qeth_dbf_list_mutex);
6282         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
6283                 list_del(&entry->dbf_list);
6284                 debug_unregister(entry->dbf_info);
6285                 kfree(entry);
6286         }
6287         mutex_unlock(&qeth_dbf_list_mutex);
6288 }
6289
6290 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
6291 {
6292         struct net_device *dev;
6293         struct qeth_priv *priv;
6294
6295         switch (card->info.type) {
6296         case QETH_CARD_TYPE_IQD:
6297                 dev = alloc_netdev_mqs(sizeof(*priv), "hsi%d", NET_NAME_UNKNOWN,
6298                                        ether_setup, QETH_MAX_OUT_QUEUES, 1);
6299                 break;
6300         case QETH_CARD_TYPE_OSM:
6301                 dev = alloc_etherdev(sizeof(*priv));
6302                 break;
6303         default:
6304                 dev = alloc_etherdev_mqs(sizeof(*priv), QETH_MAX_OUT_QUEUES, 1);
6305         }
6306
6307         if (!dev)
6308                 return NULL;
6309
6310         priv = netdev_priv(dev);
6311         priv->rx_copybreak = QETH_RX_COPYBREAK;
6312         priv->tx_wanted_queues = IS_IQD(card) ? QETH_IQD_MIN_TXQ : 1;
6313
6314         dev->ml_priv = card;
6315         dev->watchdog_timeo = QETH_TX_TIMEOUT;
6316         dev->min_mtu = 576;
6317          /* initialized when device first goes online: */
6318         dev->max_mtu = 0;
6319         dev->mtu = 0;
6320         SET_NETDEV_DEV(dev, &card->gdev->dev);
6321         netif_carrier_off(dev);
6322
6323         dev->ethtool_ops = &qeth_ethtool_ops;
6324         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
6325         dev->hw_features |= NETIF_F_SG;
6326         dev->vlan_features |= NETIF_F_SG;
6327         if (IS_IQD(card))
6328                 dev->features |= NETIF_F_SG;
6329
6330         return dev;
6331 }
6332
6333 struct net_device *qeth_clone_netdev(struct net_device *orig)
6334 {
6335         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
6336
6337         if (!clone)
6338                 return NULL;
6339
6340         clone->dev_port = orig->dev_port;
6341         return clone;
6342 }
6343
6344 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
6345 {
6346         struct qeth_card *card;
6347         struct device *dev;
6348         int rc;
6349         enum qeth_discipline_id enforced_disc;
6350         char dbf_name[DBF_NAME_LEN];
6351
6352         QETH_DBF_TEXT(SETUP, 2, "probedev");
6353
6354         dev = &gdev->dev;
6355         if (!get_device(dev))
6356                 return -ENODEV;
6357
6358         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
6359
6360         card = qeth_alloc_card(gdev);
6361         if (!card) {
6362                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
6363                 rc = -ENOMEM;
6364                 goto err_dev;
6365         }
6366
6367         scnprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
6368                   dev_name(&gdev->dev));
6369         card->debug = qeth_get_dbf_entry(dbf_name);
6370         if (!card->debug) {
6371                 rc = qeth_add_dbf_entry(card, dbf_name);
6372                 if (rc)
6373                         goto err_card;
6374         }
6375
6376         qeth_setup_card(card);
6377         card->dev = qeth_alloc_netdev(card);
6378         if (!card->dev) {
6379                 rc = -ENOMEM;
6380                 goto err_card;
6381         }
6382
6383         qeth_determine_capabilities(card);
6384         qeth_set_blkt_defaults(card);
6385
6386         card->qdio.in_q = qeth_alloc_qdio_queue();
6387         if (!card->qdio.in_q) {
6388                 rc = -ENOMEM;
6389                 goto err_rx_queue;
6390         }
6391
6392         card->qdio.no_out_queues = card->dev->num_tx_queues;
6393         rc = qeth_update_from_chp_desc(card);
6394         if (rc)
6395                 goto err_chp_desc;
6396
6397         gdev->dev.groups = qeth_dev_groups;
6398
6399         enforced_disc = qeth_enforce_discipline(card);
6400         switch (enforced_disc) {
6401         case QETH_DISCIPLINE_UNDETERMINED:
6402                 gdev->dev.type = &qeth_generic_devtype;
6403                 break;
6404         default:
6405                 card->info.layer_enforced = true;
6406                 /* It's so early that we don't need the discipline_mutex yet. */
6407                 rc = qeth_setup_discipline(card, enforced_disc);
6408                 if (rc)
6409                         goto err_setup_disc;
6410
6411                 break;
6412         }
6413
6414         return 0;
6415
6416 err_setup_disc:
6417 err_chp_desc:
6418         qeth_free_qdio_queue(card->qdio.in_q);
6419 err_rx_queue:
6420         free_netdev(card->dev);
6421 err_card:
6422         qeth_core_free_card(card);
6423 err_dev:
6424         put_device(dev);
6425         return rc;
6426 }
6427
6428 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
6429 {
6430         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6431
6432         QETH_CARD_TEXT(card, 2, "removedv");
6433
6434         mutex_lock(&card->discipline_mutex);
6435         if (card->discipline)
6436                 qeth_remove_discipline(card);
6437         mutex_unlock(&card->discipline_mutex);
6438
6439         qeth_free_qdio_queues(card);
6440
6441         qeth_free_qdio_queue(card->qdio.in_q);
6442         free_netdev(card->dev);
6443         qeth_core_free_card(card);
6444         put_device(&gdev->dev);
6445 }
6446
6447 static int qeth_core_set_online(struct ccwgroup_device *gdev)
6448 {
6449         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6450         int rc = 0;
6451         enum qeth_discipline_id def_discipline;
6452
6453         mutex_lock(&card->discipline_mutex);
6454         if (!card->discipline) {
6455                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
6456                                                 QETH_DISCIPLINE_LAYER2;
6457                 rc = qeth_setup_discipline(card, def_discipline);
6458                 if (rc)
6459                         goto err;
6460         }
6461
6462         rc = qeth_set_online(card, card->discipline);
6463
6464 err:
6465         mutex_unlock(&card->discipline_mutex);
6466         return rc;
6467 }
6468
6469 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
6470 {
6471         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6472         int rc;
6473
6474         mutex_lock(&card->discipline_mutex);
6475         rc = qeth_set_offline(card, card->discipline, false);
6476         mutex_unlock(&card->discipline_mutex);
6477
6478         return rc;
6479 }
6480
6481 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
6482 {
6483         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
6484
6485         qeth_set_allowed_threads(card, 0, 1);
6486         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
6487                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
6488         qeth_qdio_clear_card(card, 0);
6489         qeth_drain_output_queues(card);
6490         qdio_free(CARD_DDEV(card));
6491 }
6492
6493 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
6494                            size_t count)
6495 {
6496         int err;
6497
6498         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
6499                                   buf);
6500
6501         return err ? err : count;
6502 }
6503 static DRIVER_ATTR_WO(group);
6504
6505 static struct attribute *qeth_drv_attrs[] = {
6506         &driver_attr_group.attr,
6507         NULL,
6508 };
6509 static struct attribute_group qeth_drv_attr_group = {
6510         .attrs = qeth_drv_attrs,
6511 };
6512 static const struct attribute_group *qeth_drv_attr_groups[] = {
6513         &qeth_drv_attr_group,
6514         NULL,
6515 };
6516
6517 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
6518         .driver = {
6519                 .groups = qeth_drv_attr_groups,
6520                 .owner = THIS_MODULE,
6521                 .name = "qeth",
6522         },
6523         .ccw_driver = &qeth_ccw_driver,
6524         .setup = qeth_core_probe_device,
6525         .remove = qeth_core_remove_device,
6526         .set_online = qeth_core_set_online,
6527         .set_offline = qeth_core_set_offline,
6528         .shutdown = qeth_core_shutdown,
6529 };
6530
6531 int qeth_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
6532 {
6533         struct qeth_card *card = dev->ml_priv;
6534         int rc = 0;
6535
6536         switch (cmd) {
6537         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
6538                 rc = qeth_snmp_command(card, data);
6539                 break;
6540         case SIOC_QETH_GET_CARD_TYPE:
6541                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
6542                     !IS_VM_NIC(card))
6543                         return 1;
6544                 return 0;
6545         case SIOC_QETH_QUERY_OAT:
6546                 rc = qeth_query_oat_command(card, data);
6547                 break;
6548         default:
6549                 rc = -EOPNOTSUPP;
6550         }
6551         if (rc)
6552                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6553         return rc;
6554 }
6555 EXPORT_SYMBOL_GPL(qeth_siocdevprivate);
6556
6557 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
6558 {
6559         struct qeth_card *card = dev->ml_priv;
6560         struct mii_ioctl_data *mii_data;
6561         int rc = 0;
6562
6563         switch (cmd) {
6564         case SIOCGMIIPHY:
6565                 mii_data = if_mii(rq);
6566                 mii_data->phy_id = 0;
6567                 break;
6568         case SIOCGMIIREG:
6569                 mii_data = if_mii(rq);
6570                 if (mii_data->phy_id != 0)
6571                         rc = -EINVAL;
6572                 else
6573                         mii_data->val_out = qeth_mdio_read(dev,
6574                                 mii_data->phy_id, mii_data->reg_num);
6575                 break;
6576         default:
6577                 return -EOPNOTSUPP;
6578         }
6579         if (rc)
6580                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
6581         return rc;
6582 }
6583 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
6584
6585 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
6586                               unsigned long data)
6587 {
6588         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6589         u32 *features = reply->param;
6590
6591         if (qeth_setassparms_inspect_rc(cmd))
6592                 return -EIO;
6593
6594         *features = cmd->data.setassparms.data.flags_32bit;
6595         return 0;
6596 }
6597
6598 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6599                              enum qeth_prot_versions prot)
6600 {
6601         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
6602                                                  NULL, prot);
6603 }
6604
6605 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
6606                             enum qeth_prot_versions prot, u8 *lp2lp)
6607 {
6608         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6609         struct qeth_cmd_buffer *iob;
6610         struct qeth_ipa_caps caps;
6611         u32 features;
6612         int rc;
6613
6614         /* some L3 HW requires combined L3+L4 csum offload: */
6615         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
6616             cstype == IPA_OUTBOUND_CHECKSUM)
6617                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6618
6619         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6620                                        prot);
6621         if (!iob)
6622                 return -ENOMEM;
6623
6624         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
6625         if (rc)
6626                 return rc;
6627
6628         if ((required_features & features) != required_features) {
6629                 qeth_set_csum_off(card, cstype, prot);
6630                 return -EOPNOTSUPP;
6631         }
6632
6633         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6634                                        SETASS_DATA_SIZEOF(flags_32bit),
6635                                        prot);
6636         if (!iob) {
6637                 qeth_set_csum_off(card, cstype, prot);
6638                 return -ENOMEM;
6639         }
6640
6641         if (features & QETH_IPA_CHECKSUM_LP2LP)
6642                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
6643         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
6644         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6645         if (rc) {
6646                 qeth_set_csum_off(card, cstype, prot);
6647                 return rc;
6648         }
6649
6650         if (!qeth_ipa_caps_supported(&caps, required_features) ||
6651             !qeth_ipa_caps_enabled(&caps, required_features)) {
6652                 qeth_set_csum_off(card, cstype, prot);
6653                 return -EOPNOTSUPP;
6654         }
6655
6656         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6657                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6658
6659         if (lp2lp)
6660                 *lp2lp = qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP);
6661
6662         return 0;
6663 }
6664
6665 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6666                              enum qeth_prot_versions prot, u8 *lp2lp)
6667 {
6668         return on ? qeth_set_csum_on(card, cstype, prot, lp2lp) :
6669                     qeth_set_csum_off(card, cstype, prot);
6670 }
6671
6672 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6673                              unsigned long data)
6674 {
6675         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6676         struct qeth_tso_start_data *tso_data = reply->param;
6677
6678         if (qeth_setassparms_inspect_rc(cmd))
6679                 return -EIO;
6680
6681         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6682         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6683         return 0;
6684 }
6685
6686 static int qeth_set_tso_off(struct qeth_card *card,
6687                             enum qeth_prot_versions prot)
6688 {
6689         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6690                                                  IPA_CMD_ASS_STOP, NULL, prot);
6691 }
6692
6693 static int qeth_set_tso_on(struct qeth_card *card,
6694                            enum qeth_prot_versions prot)
6695 {
6696         struct qeth_tso_start_data tso_data;
6697         struct qeth_cmd_buffer *iob;
6698         struct qeth_ipa_caps caps;
6699         int rc;
6700
6701         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6702                                        IPA_CMD_ASS_START, 0, prot);
6703         if (!iob)
6704                 return -ENOMEM;
6705
6706         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
6707         if (rc)
6708                 return rc;
6709
6710         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6711                 qeth_set_tso_off(card, prot);
6712                 return -EOPNOTSUPP;
6713         }
6714
6715         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6716                                        IPA_CMD_ASS_ENABLE,
6717                                        SETASS_DATA_SIZEOF(caps), prot);
6718         if (!iob) {
6719                 qeth_set_tso_off(card, prot);
6720                 return -ENOMEM;
6721         }
6722
6723         /* enable TSO capability */
6724         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
6725                 QETH_IPA_LARGE_SEND_TCP;
6726         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
6727         if (rc) {
6728                 qeth_set_tso_off(card, prot);
6729                 return rc;
6730         }
6731
6732         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6733             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6734                 qeth_set_tso_off(card, prot);
6735                 return -EOPNOTSUPP;
6736         }
6737
6738         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6739                  tso_data.mss);
6740         return 0;
6741 }
6742
6743 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6744                             enum qeth_prot_versions prot)
6745 {
6746         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
6747 }
6748
6749 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6750 {
6751         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6752         int rc_ipv6;
6753
6754         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6755                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6756                                             QETH_PROT_IPV4, NULL);
6757         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6758                 /* no/one Offload Assist available, so the rc is trivial */
6759                 return rc_ipv4;
6760
6761         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6762                                     QETH_PROT_IPV6, NULL);
6763
6764         if (on)
6765                 /* enable: success if any Assist is active */
6766                 return (rc_ipv6) ? rc_ipv4 : 0;
6767
6768         /* disable: failure if any Assist is still active */
6769         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6770 }
6771
6772 /**
6773  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6774  * @dev:        a net_device
6775  */
6776 void qeth_enable_hw_features(struct net_device *dev)
6777 {
6778         struct qeth_card *card = dev->ml_priv;
6779         netdev_features_t features;
6780
6781         features = dev->features;
6782         /* force-off any feature that might need an IPA sequence.
6783          * netdev_update_features() will restart them.
6784          */
6785         dev->features &= ~dev->hw_features;
6786         /* toggle VLAN filter, so that VIDs are re-programmed: */
6787         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
6788                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
6789                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6790         }
6791         netdev_update_features(dev);
6792         if (features != dev->features)
6793                 dev_warn(&card->gdev->dev,
6794                          "Device recovery failed to restore all offload features\n");
6795 }
6796 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6797
6798 static void qeth_check_restricted_features(struct qeth_card *card,
6799                                            netdev_features_t changed,
6800                                            netdev_features_t actual)
6801 {
6802         netdev_features_t ipv6_features = NETIF_F_TSO6;
6803         netdev_features_t ipv4_features = NETIF_F_TSO;
6804
6805         if (!card->info.has_lp2lp_cso_v6)
6806                 ipv6_features |= NETIF_F_IPV6_CSUM;
6807         if (!card->info.has_lp2lp_cso_v4)
6808                 ipv4_features |= NETIF_F_IP_CSUM;
6809
6810         if ((changed & ipv6_features) && !(actual & ipv6_features))
6811                 qeth_flush_local_addrs6(card);
6812         if ((changed & ipv4_features) && !(actual & ipv4_features))
6813                 qeth_flush_local_addrs4(card);
6814 }
6815
6816 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6817 {
6818         struct qeth_card *card = dev->ml_priv;
6819         netdev_features_t changed = dev->features ^ features;
6820         int rc = 0;
6821
6822         QETH_CARD_TEXT(card, 2, "setfeat");
6823         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6824
6825         if ((changed & NETIF_F_IP_CSUM)) {
6826                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6827                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4,
6828                                        &card->info.has_lp2lp_cso_v4);
6829                 if (rc)
6830                         changed ^= NETIF_F_IP_CSUM;
6831         }
6832         if (changed & NETIF_F_IPV6_CSUM) {
6833                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6834                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6,
6835                                        &card->info.has_lp2lp_cso_v6);
6836                 if (rc)
6837                         changed ^= NETIF_F_IPV6_CSUM;
6838         }
6839         if (changed & NETIF_F_RXCSUM) {
6840                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6841                 if (rc)
6842                         changed ^= NETIF_F_RXCSUM;
6843         }
6844         if (changed & NETIF_F_TSO) {
6845                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6846                                       QETH_PROT_IPV4);
6847                 if (rc)
6848                         changed ^= NETIF_F_TSO;
6849         }
6850         if (changed & NETIF_F_TSO6) {
6851                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6852                                       QETH_PROT_IPV6);
6853                 if (rc)
6854                         changed ^= NETIF_F_TSO6;
6855         }
6856
6857         qeth_check_restricted_features(card, dev->features ^ features,
6858                                        dev->features ^ changed);
6859
6860         /* everything changed successfully? */
6861         if ((dev->features ^ features) == changed)
6862                 return 0;
6863         /* something went wrong. save changed features and return error */
6864         dev->features ^= changed;
6865         return -EIO;
6866 }
6867 EXPORT_SYMBOL_GPL(qeth_set_features);
6868
6869 netdev_features_t qeth_fix_features(struct net_device *dev,
6870                                     netdev_features_t features)
6871 {
6872         struct qeth_card *card = dev->ml_priv;
6873
6874         QETH_CARD_TEXT(card, 2, "fixfeat");
6875         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6876                 features &= ~NETIF_F_IP_CSUM;
6877         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6878                 features &= ~NETIF_F_IPV6_CSUM;
6879         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6880             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6881                 features &= ~NETIF_F_RXCSUM;
6882         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6883                 features &= ~NETIF_F_TSO;
6884         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6885                 features &= ~NETIF_F_TSO6;
6886
6887         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6888         return features;
6889 }
6890 EXPORT_SYMBOL_GPL(qeth_fix_features);
6891
6892 netdev_features_t qeth_features_check(struct sk_buff *skb,
6893                                       struct net_device *dev,
6894                                       netdev_features_t features)
6895 {
6896         struct qeth_card *card = dev->ml_priv;
6897
6898         /* Traffic with local next-hop is not eligible for some offloads: */
6899         if (skb->ip_summed == CHECKSUM_PARTIAL &&
6900             READ_ONCE(card->options.isolation) != ISOLATION_MODE_FWD) {
6901                 netdev_features_t restricted = 0;
6902
6903                 if (skb_is_gso(skb) && !netif_needs_gso(skb, features))
6904                         restricted |= NETIF_F_ALL_TSO;
6905
6906                 switch (vlan_get_protocol(skb)) {
6907                 case htons(ETH_P_IP):
6908                         if (!card->info.has_lp2lp_cso_v4)
6909                                 restricted |= NETIF_F_IP_CSUM;
6910
6911                         if (restricted && qeth_next_hop_is_local_v4(card, skb))
6912                                 features &= ~restricted;
6913                         break;
6914                 case htons(ETH_P_IPV6):
6915                         if (!card->info.has_lp2lp_cso_v6)
6916                                 restricted |= NETIF_F_IPV6_CSUM;
6917
6918                         if (restricted && qeth_next_hop_is_local_v6(card, skb))
6919                                 features &= ~restricted;
6920                         break;
6921                 default:
6922                         break;
6923                 }
6924         }
6925
6926         /* GSO segmentation builds skbs with
6927          *      a (small) linear part for the headers, and
6928          *      page frags for the data.
6929          * Compared to a linear skb, the header-only part consumes an
6930          * additional buffer element. This reduces buffer utilization, and
6931          * hurts throughput. So compress small segments into one element.
6932          */
6933         if (netif_needs_gso(skb, features)) {
6934                 /* match skb_segment(): */
6935                 unsigned int doffset = skb->data - skb_mac_header(skb);
6936                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6937                 unsigned int hroom = skb_headroom(skb);
6938
6939                 /* linearize only if resulting skb allocations are order-0: */
6940                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6941                         features &= ~NETIF_F_SG;
6942         }
6943
6944         return vlan_features_check(skb, features);
6945 }
6946 EXPORT_SYMBOL_GPL(qeth_features_check);
6947
6948 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6949 {
6950         struct qeth_card *card = dev->ml_priv;
6951         struct qeth_qdio_out_q *queue;
6952         unsigned int i;
6953
6954         QETH_CARD_TEXT(card, 5, "getstat");
6955
6956         stats->rx_packets = card->stats.rx_packets;
6957         stats->rx_bytes = card->stats.rx_bytes;
6958         stats->rx_errors = card->stats.rx_length_errors +
6959                            card->stats.rx_frame_errors +
6960                            card->stats.rx_fifo_errors;
6961         stats->rx_dropped = card->stats.rx_dropped_nomem +
6962                             card->stats.rx_dropped_notsupp +
6963                             card->stats.rx_dropped_runt;
6964         stats->multicast = card->stats.rx_multicast;
6965         stats->rx_length_errors = card->stats.rx_length_errors;
6966         stats->rx_frame_errors = card->stats.rx_frame_errors;
6967         stats->rx_fifo_errors = card->stats.rx_fifo_errors;
6968
6969         for (i = 0; i < card->qdio.no_out_queues; i++) {
6970                 queue = card->qdio.out_qs[i];
6971
6972                 stats->tx_packets += queue->stats.tx_packets;
6973                 stats->tx_bytes += queue->stats.tx_bytes;
6974                 stats->tx_errors += queue->stats.tx_errors;
6975                 stats->tx_dropped += queue->stats.tx_dropped;
6976         }
6977 }
6978 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6979
6980 #define TC_IQD_UCAST   0
6981 static void qeth_iqd_set_prio_tc_map(struct net_device *dev,
6982                                      unsigned int ucast_txqs)
6983 {
6984         unsigned int prio;
6985
6986         /* IQD requires mcast traffic to be placed on a dedicated queue, and
6987          * qeth_iqd_select_queue() deals with this.
6988          * For unicast traffic, we defer the queue selection to the stack.
6989          * By installing a trivial prio map that spans over only the unicast
6990          * queues, we can encourage the stack to spread the ucast traffic evenly
6991          * without selecting the mcast queue.
6992          */
6993
6994         /* One traffic class, spanning over all active ucast queues: */
6995         netdev_set_num_tc(dev, 1);
6996         netdev_set_tc_queue(dev, TC_IQD_UCAST, ucast_txqs,
6997                             QETH_IQD_MIN_UCAST_TXQ);
6998
6999         /* Map all priorities to this traffic class: */
7000         for (prio = 0; prio <= TC_BITMASK; prio++)
7001                 netdev_set_prio_tc_map(dev, prio, TC_IQD_UCAST);
7002 }
7003
7004 int qeth_set_real_num_tx_queues(struct qeth_card *card, unsigned int count)
7005 {
7006         struct net_device *dev = card->dev;
7007         int rc;
7008
7009         /* Per netif_setup_tc(), adjust the mapping first: */
7010         if (IS_IQD(card))
7011                 qeth_iqd_set_prio_tc_map(dev, count - 1);
7012
7013         rc = netif_set_real_num_tx_queues(dev, count);
7014
7015         if (rc && IS_IQD(card))
7016                 qeth_iqd_set_prio_tc_map(dev, dev->real_num_tx_queues - 1);
7017
7018         return rc;
7019 }
7020 EXPORT_SYMBOL_GPL(qeth_set_real_num_tx_queues);
7021
7022 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
7023                           u8 cast_type, struct net_device *sb_dev)
7024 {
7025         u16 txq;
7026
7027         if (cast_type != RTN_UNICAST)
7028                 return QETH_IQD_MCAST_TXQ;
7029         if (dev->real_num_tx_queues == QETH_IQD_MIN_TXQ)
7030                 return QETH_IQD_MIN_UCAST_TXQ;
7031
7032         txq = netdev_pick_tx(dev, skb, sb_dev);
7033         return (txq == QETH_IQD_MCAST_TXQ) ? QETH_IQD_MIN_UCAST_TXQ : txq;
7034 }
7035 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
7036
7037 u16 qeth_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
7038                           struct net_device *sb_dev)
7039 {
7040         struct qeth_card *card = dev->ml_priv;
7041
7042         if (qeth_uses_tx_prio_queueing(card))
7043                 return qeth_get_priority_queue(card, skb);
7044
7045         return netdev_pick_tx(dev, skb, sb_dev);
7046 }
7047 EXPORT_SYMBOL_GPL(qeth_osa_select_queue);
7048
7049 int qeth_open(struct net_device *dev)
7050 {
7051         struct qeth_card *card = dev->ml_priv;
7052         struct qeth_qdio_out_q *queue;
7053         unsigned int i;
7054
7055         QETH_CARD_TEXT(card, 4, "qethopen");
7056
7057         card->data.state = CH_STATE_UP;
7058         netif_tx_start_all_queues(dev);
7059
7060         local_bh_disable();
7061         qeth_for_each_output_queue(card, queue, i) {
7062                 netif_napi_add_tx(dev, &queue->napi, qeth_tx_poll);
7063                 napi_enable(&queue->napi);
7064                 napi_schedule(&queue->napi);
7065         }
7066
7067         napi_enable(&card->napi);
7068         napi_schedule(&card->napi);
7069         /* kick-start the NAPI softirq: */
7070         local_bh_enable();
7071
7072         return 0;
7073 }
7074 EXPORT_SYMBOL_GPL(qeth_open);
7075
7076 int qeth_stop(struct net_device *dev)
7077 {
7078         struct qeth_card *card = dev->ml_priv;
7079         struct qeth_qdio_out_q *queue;
7080         unsigned int i;
7081
7082         QETH_CARD_TEXT(card, 4, "qethstop");
7083
7084         napi_disable(&card->napi);
7085         cancel_delayed_work_sync(&card->buffer_reclaim_work);
7086         qdio_stop_irq(CARD_DDEV(card));
7087
7088         /* Quiesce the NAPI instances: */
7089         qeth_for_each_output_queue(card, queue, i)
7090                 napi_disable(&queue->napi);
7091
7092         /* Stop .ndo_start_xmit, might still access queue->napi. */
7093         netif_tx_disable(dev);
7094
7095         qeth_for_each_output_queue(card, queue, i) {
7096                 del_timer_sync(&queue->timer);
7097                 /* Queues may get re-allocated, so remove the NAPIs. */
7098                 netif_napi_del(&queue->napi);
7099         }
7100
7101         return 0;
7102 }
7103 EXPORT_SYMBOL_GPL(qeth_stop);
7104
7105 static int __init qeth_core_init(void)
7106 {
7107         int rc;
7108
7109         pr_info("loading core functions\n");
7110
7111         qeth_debugfs_root = debugfs_create_dir("qeth", NULL);
7112
7113         rc = qeth_register_dbf_views();
7114         if (rc)
7115                 goto dbf_err;
7116         qeth_core_root_dev = root_device_register("qeth");
7117         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
7118         if (rc)
7119                 goto register_err;
7120         qeth_core_header_cache =
7121                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
7122                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
7123                                   0, NULL);
7124         if (!qeth_core_header_cache) {
7125                 rc = -ENOMEM;
7126                 goto slab_err;
7127         }
7128         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
7129                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
7130         if (!qeth_qdio_outbuf_cache) {
7131                 rc = -ENOMEM;
7132                 goto cqslab_err;
7133         }
7134
7135         qeth_qaob_cache = kmem_cache_create("qeth_qaob",
7136                                             sizeof(struct qaob),
7137                                             sizeof(struct qaob),
7138                                             0, NULL);
7139         if (!qeth_qaob_cache) {
7140                 rc = -ENOMEM;
7141                 goto qaob_err;
7142         }
7143
7144         rc = ccw_driver_register(&qeth_ccw_driver);
7145         if (rc)
7146                 goto ccw_err;
7147         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
7148         if (rc)
7149                 goto ccwgroup_err;
7150
7151         return 0;
7152
7153 ccwgroup_err:
7154         ccw_driver_unregister(&qeth_ccw_driver);
7155 ccw_err:
7156         kmem_cache_destroy(qeth_qaob_cache);
7157 qaob_err:
7158         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7159 cqslab_err:
7160         kmem_cache_destroy(qeth_core_header_cache);
7161 slab_err:
7162         root_device_unregister(qeth_core_root_dev);
7163 register_err:
7164         qeth_unregister_dbf_views();
7165 dbf_err:
7166         debugfs_remove_recursive(qeth_debugfs_root);
7167         pr_err("Initializing the qeth device driver failed\n");
7168         return rc;
7169 }
7170
7171 static void __exit qeth_core_exit(void)
7172 {
7173         qeth_clear_dbf_list();
7174         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
7175         ccw_driver_unregister(&qeth_ccw_driver);
7176         kmem_cache_destroy(qeth_qaob_cache);
7177         kmem_cache_destroy(qeth_qdio_outbuf_cache);
7178         kmem_cache_destroy(qeth_core_header_cache);
7179         root_device_unregister(qeth_core_root_dev);
7180         qeth_unregister_dbf_views();
7181         debugfs_remove_recursive(qeth_debugfs_root);
7182         pr_info("core functions removed\n");
7183 }
7184
7185 module_init(qeth_core_init);
7186 module_exit(qeth_core_exit);
7187 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
7188 MODULE_DESCRIPTION("qeth core functions");
7189 MODULE_LICENSE("GPL");