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/ip.h>
  21 #include <linux/tcp.h>
  22 #include <linux/mii.h>
  23 #include <linux/mm.h>
  24 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_vlan.h>
  27 #include <linux/netdevice.h>
  28 #include <linux/netdev_features.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/vmalloc.h>
  31
  32 #include <net/iucv/af_iucv.h>
  33 #include <net/dsfield.h>
  34
  35 #include <asm/ebcdic.h>
  36 #include <asm/chpid.h>
  37 #include <asm/io.h>
  38 #include <asm/sysinfo.h>
  39 #include <asm/diag.h>
  40 #include <asm/cio.h>
  41 #include <asm/ccwdev.h>
  42 #include <asm/cpcmd.h>
  43
  44 #include "qeth_core.h"
  45
  46 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  47         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  48         /*                   N  P  A    M  L  V                      H  */
  49         [QETH_DBF_SETUP] = {"qeth_setup",
  50                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  51         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  52                             &debug_sprintf_view, NULL},
  53         [QETH_DBF_CTRL]  = {"qeth_control",
  54                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  55 };
  56 EXPORT_SYMBOL_GPL(qeth_dbf);
  57
  58 struct kmem_cache *qeth_core_header_cache;
  59 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  60 static struct kmem_cache *qeth_qdio_outbuf_cache;
  61
  62 static struct device *qeth_core_root_dev;
  63 static struct lock_class_key qdio_out_skb_queue_key;
  64
  65 static void qeth_issue_next_read_cb(struct qeth_card *card,
  66                                     struct qeth_cmd_buffer *iob);
  67 static void qeth_free_buffer_pool(struct qeth_card *);
  68 static int qeth_qdio_establish(struct qeth_card *);
  69 static void qeth_free_qdio_queues(struct qeth_card *card);
  70 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  71                 struct qeth_qdio_out_buffer *buf,
  72                 enum iucv_tx_notify notification);
  73 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  74 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  75
  76 static void qeth_close_dev_handler(struct work_struct *work)
  77 {
  78         struct qeth_card *card;
  79
  80         card = container_of(work, struct qeth_card, close_dev_work);
  81         QETH_CARD_TEXT(card, 2, "cldevhdl");
  82         ccwgroup_set_offline(card->gdev);
  83 }
  84
  85 static const char *qeth_get_cardname(struct qeth_card *card)
  86 {
  87         if (IS_VM_NIC(card)) {
  88                 switch (card->info.type) {
  89                 case QETH_CARD_TYPE_OSD:
  90                         return " Virtual NIC QDIO";
  91                 case QETH_CARD_TYPE_IQD:
  92                         return " Virtual NIC Hiper";
  93                 case QETH_CARD_TYPE_OSM:
  94                         return " Virtual NIC QDIO - OSM";
  95                 case QETH_CARD_TYPE_OSX:
  96                         return " Virtual NIC QDIO - OSX";
  97                 default:
  98                         return " unknown";
  99                 }
 100         } else {
 101                 switch (card->info.type) {
 102                 case QETH_CARD_TYPE_OSD:
 103                         return " OSD Express";
 104                 case QETH_CARD_TYPE_IQD:
 105                         return " HiperSockets";
 106                 case QETH_CARD_TYPE_OSN:
 107                         return " OSN QDIO";
 108                 case QETH_CARD_TYPE_OSM:
 109                         return " OSM QDIO";
 110                 case QETH_CARD_TYPE_OSX:
 111                         return " OSX QDIO";
 112                 default:
 113                         return " unknown";
 114                 }
 115         }
 116         return " n/a";
 117 }
 118
 119 /* max length to be returned: 14 */
 120 const char *qeth_get_cardname_short(struct qeth_card *card)
 121 {
 122         if (IS_VM_NIC(card)) {
 123                 switch (card->info.type) {
 124                 case QETH_CARD_TYPE_OSD:
 125                         return "Virt.NIC QDIO";
 126                 case QETH_CARD_TYPE_IQD:
 127                         return "Virt.NIC Hiper";
 128                 case QETH_CARD_TYPE_OSM:
 129                         return "Virt.NIC OSM";
 130                 case QETH_CARD_TYPE_OSX:
 131                         return "Virt.NIC OSX";
 132                 default:
 133                         return "unknown";
 134                 }
 135         } else {
 136                 switch (card->info.type) {
 137                 case QETH_CARD_TYPE_OSD:
 138                         switch (card->info.link_type) {
 139                         case QETH_LINK_TYPE_FAST_ETH:
 140                                 return "OSD_100";
 141                         case QETH_LINK_TYPE_HSTR:
 142                                 return "HSTR";
 143                         case QETH_LINK_TYPE_GBIT_ETH:
 144                                 return "OSD_1000";
 145                         case QETH_LINK_TYPE_10GBIT_ETH:
 146                                 return "OSD_10GIG";
 147                         case QETH_LINK_TYPE_25GBIT_ETH:
 148                                 return "OSD_25GIG";
 149                         case QETH_LINK_TYPE_LANE_ETH100:
 150                                 return "OSD_FE_LANE";
 151                         case QETH_LINK_TYPE_LANE_TR:
 152                                 return "OSD_TR_LANE";
 153                         case QETH_LINK_TYPE_LANE_ETH1000:
 154                                 return "OSD_GbE_LANE";
 155                         case QETH_LINK_TYPE_LANE:
 156                                 return "OSD_ATM_LANE";
 157                         default:
 158                                 return "OSD_Express";
 159                         }
 160                 case QETH_CARD_TYPE_IQD:
 161                         return "HiperSockets";
 162                 case QETH_CARD_TYPE_OSN:
 163                         return "OSN";
 164                 case QETH_CARD_TYPE_OSM:
 165                         return "OSM_1000";
 166                 case QETH_CARD_TYPE_OSX:
 167                         return "OSX_10GIG";
 168                 default:
 169                         return "unknown";
 170                 }
 171         }
 172         return "n/a";
 173 }
 174
 175 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 176                          int clear_start_mask)
 177 {
 178         unsigned long flags;
 179
 180         spin_lock_irqsave(&card->thread_mask_lock, flags);
 181         card->thread_allowed_mask = threads;
 182         if (clear_start_mask)
 183                 card->thread_start_mask &= threads;
 184         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 185         wake_up(&card->wait_q);
 186 }
 187 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 188
 189 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 190 {
 191         unsigned long flags;
 192         int rc = 0;
 193
 194         spin_lock_irqsave(&card->thread_mask_lock, flags);
 195         rc = (card->thread_running_mask & threads);
 196         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 197         return rc;
 198 }
 199 EXPORT_SYMBOL_GPL(qeth_threads_running);
 200
 201 void qeth_clear_working_pool_list(struct qeth_card *card)
 202 {
 203         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 204
 205         QETH_CARD_TEXT(card, 5, "clwrklst");
 206         list_for_each_entry_safe(pool_entry, tmp,
 207                             &card->qdio.in_buf_pool.entry_list, list){
 208                         list_del(&pool_entry->list);
 209         }
 210 }
 211 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 212
 213 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 214 {
 215         struct qeth_buffer_pool_entry *pool_entry;
 216         void *ptr;
 217         int i, j;
 218
 219         QETH_CARD_TEXT(card, 5, "alocpool");
 220         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 221                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 222                 if (!pool_entry) {
 223                         qeth_free_buffer_pool(card);
 224                         return -ENOMEM;
 225                 }
 226                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 227                         ptr = (void *) __get_free_page(GFP_KERNEL);
 228                         if (!ptr) {
 229                                 while (j > 0)
 230                                         free_page((unsigned long)
 231                                                   pool_entry->elements[--j]);
 232                                 kfree(pool_entry);
 233                                 qeth_free_buffer_pool(card);
 234                                 return -ENOMEM;
 235                         }
 236                         pool_entry->elements[j] = ptr;
 237                 }
 238                 list_add(&pool_entry->init_list,
 239                          &card->qdio.init_pool.entry_list);
 240         }
 241         return 0;
 242 }
 243
 244 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 245 {
 246         QETH_CARD_TEXT(card, 2, "realcbp");
 247
 248         if (card->state != CARD_STATE_DOWN)
 249                 return -EPERM;
 250
 251         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 252         qeth_clear_working_pool_list(card);
 253         qeth_free_buffer_pool(card);
 254         card->qdio.in_buf_pool.buf_count = bufcnt;
 255         card->qdio.init_pool.buf_count = bufcnt;
 256         return qeth_alloc_buffer_pool(card);
 257 }
 258 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 259
 260 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 261 {
 262         if (!q)
 263                 return;
 264
 265         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 266         kfree(q);
 267 }
 268
 269 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 270 {
 271         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 272         int i;
 273
 274         if (!q)
 275                 return NULL;
 276
 277         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 278                 kfree(q);
 279                 return NULL;
 280         }
 281
 282         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 283                 q->bufs[i].buffer = q->qdio_bufs[i];
 284
 285         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 286         return q;
 287 }
 288
 289 static int qeth_cq_init(struct qeth_card *card)
 290 {
 291         int rc;
 292
 293         if (card->options.cq == QETH_CQ_ENABLED) {
 294                 QETH_CARD_TEXT(card, 2, "cqinit");
 295                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 296                                    QDIO_MAX_BUFFERS_PER_Q);
 297                 card->qdio.c_q->next_buf_to_init = 127;
 298                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 299                              card->qdio.no_in_queues - 1, 0,
 300                              127);
 301                 if (rc) {
 302                         QETH_CARD_TEXT_(card, 2, "1err%d", rc);
 303                         goto out;
 304                 }
 305         }
 306         rc = 0;
 307 out:
 308         return rc;
 309 }
 310
 311 static int qeth_alloc_cq(struct qeth_card *card)
 312 {
 313         int rc;
 314
 315         if (card->options.cq == QETH_CQ_ENABLED) {
 316                 int i;
 317                 struct qdio_outbuf_state *outbuf_states;
 318
 319                 QETH_CARD_TEXT(card, 2, "cqon");
 320                 card->qdio.c_q = qeth_alloc_qdio_queue();
 321                 if (!card->qdio.c_q) {
 322                         rc = -1;
 323                         goto kmsg_out;
 324                 }
 325                 card->qdio.no_in_queues = 2;
 326                 card->qdio.out_bufstates =
 327                         kcalloc(card->qdio.no_out_queues *
 328                                         QDIO_MAX_BUFFERS_PER_Q,
 329                                 sizeof(struct qdio_outbuf_state),
 330                                 GFP_KERNEL);
 331                 outbuf_states = card->qdio.out_bufstates;
 332                 if (outbuf_states == NULL) {
 333                         rc = -1;
 334                         goto free_cq_out;
 335                 }
 336                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 337                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 338                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 339                 }
 340         } else {
 341                 QETH_CARD_TEXT(card, 2, "nocq");
 342                 card->qdio.c_q = NULL;
 343                 card->qdio.no_in_queues = 1;
 344         }
 345         QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
 346         rc = 0;
 347 out:
 348         return rc;
 349 free_cq_out:
 350         qeth_free_qdio_queue(card->qdio.c_q);
 351         card->qdio.c_q = NULL;
 352 kmsg_out:
 353         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 354         goto out;
 355 }
 356
 357 static void qeth_free_cq(struct qeth_card *card)
 358 {
 359         if (card->qdio.c_q) {
 360                 --card->qdio.no_in_queues;
 361                 qeth_free_qdio_queue(card->qdio.c_q);
 362                 card->qdio.c_q = NULL;
 363         }
 364         kfree(card->qdio.out_bufstates);
 365         card->qdio.out_bufstates = NULL;
 366 }
 367
 368 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 369                                                         int delayed)
 370 {
 371         enum iucv_tx_notify n;
 372
 373         switch (sbalf15) {
 374         case 0:
 375                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 376                 break;
 377         case 4:
 378         case 16:
 379         case 17:
 380         case 18:
 381                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 382                         TX_NOTIFY_UNREACHABLE;
 383                 break;
 384         default:
 385                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 386                         TX_NOTIFY_GENERALERROR;
 387                 break;
 388         }
 389
 390         return n;
 391 }
 392
 393 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 394                                          int forced_cleanup)
 395 {
 396         if (q->card->options.cq != QETH_CQ_ENABLED)
 397                 return;
 398
 399         if (q->bufs[bidx]->next_pending != NULL) {
 400                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 401                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 402
 403                 while (c) {
 404                         if (forced_cleanup ||
 405                             atomic_read(&c->state) ==
 406                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 407                                 struct qeth_qdio_out_buffer *f = c;
 408                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 409                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 410                                 /* release here to avoid interleaving between
 411                                    outbound tasklet and inbound tasklet
 412                                    regarding notifications and lifecycle */
 413                                 qeth_release_skbs(c);
 414
 415                                 c = f->next_pending;
 416                                 WARN_ON_ONCE(head->next_pending != f);
 417                                 head->next_pending = c;
 418                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 419                         } else {
 420                                 head = c;
 421                                 c = c->next_pending;
 422                         }
 423
 424                 }
 425         }
 426         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 427                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 428                 /* for recovery situations */
 429                 qeth_init_qdio_out_buf(q, bidx);
 430                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 431         }
 432 }
 433
 434
 435 static void qeth_qdio_handle_aob(struct qeth_card *card,
 436                                  unsigned long phys_aob_addr)
 437 {
 438         struct qaob *aob;
 439         struct qeth_qdio_out_buffer *buffer;
 440         enum iucv_tx_notify notification;
 441         unsigned int i;
 442
 443         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 444         QETH_CARD_TEXT(card, 5, "haob");
 445         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 446         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 447         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 448
 449         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 450                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 451                 notification = TX_NOTIFY_OK;
 452         } else {
 453                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 454                                                         QETH_QDIO_BUF_PENDING);
 455                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 456                 notification = TX_NOTIFY_DELAYED_OK;
 457         }
 458
 459         if (aob->aorc != 0)  {
 460                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 461                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 462         }
 463         qeth_notify_skbs(buffer->q, buffer, notification);
 464
 465         /* Free dangling allocations. The attached skbs are handled by
 466          * qeth_cleanup_handled_pending().
 467          */
 468         for (i = 0;
 469              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 470              i++) {
 471                 if (aob->sba[i] && buffer->is_header[i])
 472                         kmem_cache_free(qeth_core_header_cache,
 473                                         (void *) aob->sba[i]);
 474         }
 475         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 476
 477         qdio_release_aob(aob);
 478 }
 479
 480 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 481 {
 482         return card->options.cq == QETH_CQ_ENABLED &&
 483             card->qdio.c_q != NULL &&
 484             queue != 0 &&
 485             queue == card->qdio.no_in_queues - 1;
 486 }
 487
 488 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u8 flags, u32 len,
 489                            void *data)
 490 {
 491         ccw->cmd_code = cmd_code;
 492         ccw->flags = flags | CCW_FLAG_SLI;
 493         ccw->count = len;
 494         ccw->cda = (__u32) __pa(data);
 495 }
 496
 497 static int __qeth_issue_next_read(struct qeth_card *card)
 498 {
 499         struct qeth_cmd_buffer *iob = card->read_cmd;
 500         struct qeth_channel *channel = iob->channel;
 501         struct ccw1 *ccw = __ccw_from_cmd(iob);
 502         int rc;
 503
 504         QETH_CARD_TEXT(card, 5, "issnxrd");
 505         if (channel->state != CH_STATE_UP)
 506                 return -EIO;
 507
 508         memset(iob->data, 0, iob->length);
 509         qeth_setup_ccw(ccw, CCW_CMD_READ, 0, iob->length, iob->data);
 510         iob->callback = qeth_issue_next_read_cb;
 511         /* keep the cmd alive after completion: */
 512         qeth_get_cmd(iob);
 513
 514         QETH_CARD_TEXT(card, 6, "noirqpnd");
 515         rc = ccw_device_start(channel->ccwdev, ccw, (addr_t) iob, 0, 0);
 516         if (rc) {
 517                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 518                                  rc, CARD_DEVID(card));
 519                 atomic_set(&channel->irq_pending, 0);
 520                 qeth_put_cmd(iob);
 521                 card->read_or_write_problem = 1;
 522                 qeth_schedule_recovery(card);
 523                 wake_up(&card->wait_q);
 524         }
 525         return rc;
 526 }
 527
 528 static int qeth_issue_next_read(struct qeth_card *card)
 529 {
 530         int ret;
 531
 532         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 533         ret = __qeth_issue_next_read(card);
 534         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 535
 536         return ret;
 537 }
 538
 539 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 540 {
 541         struct qeth_reply *reply;
 542
 543         reply = kzalloc(sizeof(*reply), GFP_KERNEL);
 544         if (reply) {
 545                 refcount_set(&reply->refcnt, 1);
 546                 init_completion(&reply->received);
 547                 spin_lock_init(&reply->lock);
 548         }
 549         return reply;
 550 }
 551
 552 static void qeth_get_reply(struct qeth_reply *reply)
 553 {
 554         refcount_inc(&reply->refcnt);
 555 }
 556
 557 static void qeth_put_reply(struct qeth_reply *reply)
 558 {
 559         if (refcount_dec_and_test(&reply->refcnt))
 560                 kfree(reply);
 561 }
 562
 563 static void qeth_enqueue_reply(struct qeth_card *card, struct qeth_reply *reply)
 564 {
 565         spin_lock_irq(&card->lock);
 566         list_add_tail(&reply->list, &card->cmd_waiter_list);
 567         spin_unlock_irq(&card->lock);
 568 }
 569
 570 static void qeth_dequeue_reply(struct qeth_card *card, struct qeth_reply *reply)
 571 {
 572         spin_lock_irq(&card->lock);
 573         list_del(&reply->list);
 574         spin_unlock_irq(&card->lock);
 575 }
 576
 577 void qeth_notify_reply(struct qeth_reply *reply, int reason)
 578 {
 579         reply->rc = reason;
 580         complete(&reply->received);
 581 }
 582 EXPORT_SYMBOL_GPL(qeth_notify_reply);
 583
 584 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 585                 struct qeth_card *card)
 586 {
 587         const char *ipa_name;
 588         int com = cmd->hdr.command;
 589         ipa_name = qeth_get_ipa_cmd_name(com);
 590
 591         if (rc)
 592                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 593                                  ipa_name, com, CARD_DEVID(card), rc,
 594                                  qeth_get_ipa_msg(rc));
 595         else
 596                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 597                                  ipa_name, com, CARD_DEVID(card));
 598 }
 599
 600 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 601                                                 struct qeth_ipa_cmd *cmd)
 602 {
 603         QETH_CARD_TEXT(card, 5, "chkipad");
 604
 605         if (IS_IPA_REPLY(cmd)) {
 606                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 607                     cmd->hdr.command != IPA_CMD_DELCCID &&
 608                     cmd->hdr.command != IPA_CMD_MODCCID &&
 609                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 610                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 611                 return cmd;
 612         }
 613
 614         /* handle unsolicited event: */
 615         switch (cmd->hdr.command) {
 616         case IPA_CMD_STOPLAN:
 617                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 618                         dev_err(&card->gdev->dev,
 619                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 620                                 QETH_CARD_IFNAME(card));
 621                         schedule_work(&card->close_dev_work);
 622                 } else {
 623                         dev_warn(&card->gdev->dev,
 624                                  "The link for interface %s on CHPID 0x%X failed\n",
 625                                  QETH_CARD_IFNAME(card), card->info.chpid);
 626                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 627                         netif_carrier_off(card->dev);
 628                 }
 629                 return NULL;
 630         case IPA_CMD_STARTLAN:
 631                 dev_info(&card->gdev->dev,
 632                          "The link for %s on CHPID 0x%X has been restored\n",
 633                          QETH_CARD_IFNAME(card), card->info.chpid);
 634                 if (card->info.hwtrap)
 635                         card->info.hwtrap = 2;
 636                 qeth_schedule_recovery(card);
 637                 return NULL;
 638         case IPA_CMD_SETBRIDGEPORT_IQD:
 639         case IPA_CMD_SETBRIDGEPORT_OSA:
 640         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 641                 if (card->discipline->control_event_handler(card, cmd))
 642                         return cmd;
 643                 return NULL;
 644         case IPA_CMD_MODCCID:
 645                 return cmd;
 646         case IPA_CMD_REGISTER_LOCAL_ADDR:
 647                 QETH_CARD_TEXT(card, 3, "irla");
 648                 return NULL;
 649         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 650                 QETH_CARD_TEXT(card, 3, "urla");
 651                 return NULL;
 652         default:
 653                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 654                 return cmd;
 655         }
 656 }
 657
 658 void qeth_clear_ipacmd_list(struct qeth_card *card)
 659 {
 660         struct qeth_reply *reply;
 661         unsigned long flags;
 662
 663         QETH_CARD_TEXT(card, 4, "clipalst");
 664
 665         spin_lock_irqsave(&card->lock, flags);
 666         list_for_each_entry(reply, &card->cmd_waiter_list, list)
 667                 qeth_notify_reply(reply, -EIO);
 668         spin_unlock_irqrestore(&card->lock, flags);
 669 }
 670 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 671
 672 static int qeth_check_idx_response(struct qeth_card *card,
 673         unsigned char *buffer)
 674 {
 675         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 676         if ((buffer[2] & 0xc0) == 0xc0) {
 677                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 678                                  buffer[4]);
 679                 QETH_CARD_TEXT(card, 2, "ckidxres");
 680                 QETH_CARD_TEXT(card, 2, " idxterm");
 681                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 682                 if (buffer[4] == 0xf6) {
 683                         dev_err(&card->gdev->dev,
 684                         "The qeth device is not configured "
 685                         "for the OSI layer required by z/VM\n");
 686                         return -EPERM;
 687                 }
 688                 return -EIO;
 689         }
 690         return 0;
 691 }
 692
 693 void qeth_put_cmd(struct qeth_cmd_buffer *iob)
 694 {
 695         if (refcount_dec_and_test(&iob->ref_count)) {
 696                 if (iob->reply)
 697                         qeth_put_reply(iob->reply);
 698                 kfree(iob->data);
 699                 kfree(iob);
 700         }
 701 }
 702 EXPORT_SYMBOL_GPL(qeth_put_cmd);
 703
 704 static void qeth_release_buffer_cb(struct qeth_card *card,
 705                                    struct qeth_cmd_buffer *iob)
 706 {
 707         qeth_put_cmd(iob);
 708 }
 709
 710 static void qeth_cancel_cmd(struct qeth_cmd_buffer *iob, int rc)
 711 {
 712         struct qeth_reply *reply = iob->reply;
 713
 714         if (reply)
 715                 qeth_notify_reply(reply, rc);
 716         qeth_put_cmd(iob);
 717 }
 718
 719 struct qeth_cmd_buffer *qeth_alloc_cmd(struct qeth_channel *channel,
 720                                        unsigned int length, unsigned int ccws,
 721                                        long timeout)
 722 {
 723         struct qeth_cmd_buffer *iob;
 724
 725         if (length > QETH_BUFSIZE)
 726                 return NULL;
 727
 728         iob = kzalloc(sizeof(*iob), GFP_KERNEL);
 729         if (!iob)
 730                 return NULL;
 731
 732         iob->data = kzalloc(ALIGN(length, 8) + ccws * sizeof(struct ccw1),
 733                             GFP_KERNEL | GFP_DMA);
 734         if (!iob->data) {
 735                 kfree(iob);
 736                 return NULL;
 737         }
 738
 739         refcount_set(&iob->ref_count, 1);
 740         iob->channel = channel;
 741         iob->timeout = timeout;
 742         iob->length = length;
 743         return iob;
 744 }
 745 EXPORT_SYMBOL_GPL(qeth_alloc_cmd);
 746
 747 static void qeth_issue_next_read_cb(struct qeth_card *card,
 748                                     struct qeth_cmd_buffer *iob)
 749 {
 750         struct qeth_ipa_cmd *cmd = NULL;
 751         struct qeth_reply *reply = NULL;
 752         struct qeth_reply *r;
 753         unsigned long flags;
 754         int rc = 0;
 755
 756         QETH_CARD_TEXT(card, 4, "sndctlcb");
 757         rc = qeth_check_idx_response(card, iob->data);
 758         switch (rc) {
 759         case 0:
 760                 break;
 761         case -EIO:
 762                 qeth_clear_ipacmd_list(card);
 763                 qeth_schedule_recovery(card);
 764                 /* fall through */
 765         default:
 766                 goto out;
 767         }
 768
 769         if (IS_IPA(iob->data)) {
 770                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 771                 cmd = qeth_check_ipa_data(card, cmd);
 772                 if (!cmd)
 773                         goto out;
 774                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 775                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 776                         card->osn_info.assist_cb(card->dev, cmd);
 777                         goto out;
 778                 }
 779         } else {
 780                 /* non-IPA commands should only flow during initialization */
 781                 if (card->state != CARD_STATE_DOWN)
 782                         goto out;
 783         }
 784
 785         /* match against pending cmd requests */
 786         spin_lock_irqsave(&card->lock, flags);
 787         list_for_each_entry(r, &card->cmd_waiter_list, list) {
 788                 if ((r->seqno == QETH_IDX_COMMAND_SEQNO) ||
 789                     (cmd && (r->seqno == cmd->hdr.seqno))) {
 790                         reply = r;
 791                         /* take the object outside the lock */
 792                         qeth_get_reply(reply);
 793                         break;
 794                 }
 795         }
 796         spin_unlock_irqrestore(&card->lock, flags);
 797
 798         if (!reply)
 799                 goto out;
 800
 801         if (!reply->callback) {
 802                 rc = 0;
 803                 goto no_callback;
 804         }
 805
 806         spin_lock_irqsave(&reply->lock, flags);
 807         if (reply->rc) {
 808                 /* Bail out when the requestor has already left: */
 809                 rc = reply->rc;
 810         } else {
 811                 if (cmd) {
 812                         reply->offset = (u16)((char *)cmd - (char *)iob->data);
 813                         rc = reply->callback(card, reply, (unsigned long)cmd);
 814                 } else {
 815                         rc = reply->callback(card, reply, (unsigned long)iob);
 816                 }
 817         }
 818         spin_unlock_irqrestore(&reply->lock, flags);
 819
 820 no_callback:
 821         if (rc <= 0)
 822                 qeth_notify_reply(reply, rc);
 823         qeth_put_reply(reply);
 824
 825 out:
 826         memcpy(&card->seqno.pdu_hdr_ack,
 827                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 828                 QETH_SEQ_NO_LENGTH);
 829         qeth_put_cmd(iob);
 830         __qeth_issue_next_read(card);
 831 }
 832
 833 static int qeth_set_thread_start_bit(struct qeth_card *card,
 834                 unsigned long thread)
 835 {
 836         unsigned long flags;
 837
 838         spin_lock_irqsave(&card->thread_mask_lock, flags);
 839         if (!(card->thread_allowed_mask & thread) ||
 840               (card->thread_start_mask & thread)) {
 841                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 842                 return -EPERM;
 843         }
 844         card->thread_start_mask |= thread;
 845         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 846         return 0;
 847 }
 848
 849 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 850 {
 851         unsigned long flags;
 852
 853         spin_lock_irqsave(&card->thread_mask_lock, flags);
 854         card->thread_start_mask &= ~thread;
 855         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 856         wake_up(&card->wait_q);
 857 }
 858 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 859
 860 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 861 {
 862         unsigned long flags;
 863
 864         spin_lock_irqsave(&card->thread_mask_lock, flags);
 865         card->thread_running_mask &= ~thread;
 866         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 867         wake_up_all(&card->wait_q);
 868 }
 869 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 870
 871 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 872 {
 873         unsigned long flags;
 874         int rc = 0;
 875
 876         spin_lock_irqsave(&card->thread_mask_lock, flags);
 877         if (card->thread_start_mask & thread) {
 878                 if ((card->thread_allowed_mask & thread) &&
 879                     !(card->thread_running_mask & thread)) {
 880                         rc = 1;
 881                         card->thread_start_mask &= ~thread;
 882                         card->thread_running_mask |= thread;
 883                 } else
 884                         rc = -EPERM;
 885         }
 886         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 887         return rc;
 888 }
 889
 890 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 891 {
 892         int rc = 0;
 893
 894         wait_event(card->wait_q,
 895                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 896         return rc;
 897 }
 898 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 899
 900 void qeth_schedule_recovery(struct qeth_card *card)
 901 {
 902         QETH_CARD_TEXT(card, 2, "startrec");
 903         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 904                 schedule_work(&card->kernel_thread_starter);
 905 }
 906 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 907
 908 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 909                             struct irb *irb)
 910 {
 911         int dstat, cstat;
 912         char *sense;
 913
 914         sense = (char *) irb->ecw;
 915         cstat = irb->scsw.cmd.cstat;
 916         dstat = irb->scsw.cmd.dstat;
 917
 918         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 919                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 920                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 921                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 922                 dev_warn(&cdev->dev, "The qeth device driver "
 923                         "failed to recover an error on the device\n");
 924                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 925                                  CCW_DEVID(cdev), dstat, cstat);
 926                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 927                                 16, 1, irb, 64, 1);
 928                 return 1;
 929         }
 930
 931         if (dstat & DEV_STAT_UNIT_CHECK) {
 932                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 933                     SENSE_RESETTING_EVENT_FLAG) {
 934                         QETH_CARD_TEXT(card, 2, "REVIND");
 935                         return 1;
 936                 }
 937                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 938                     SENSE_COMMAND_REJECT_FLAG) {
 939                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 940                         return 1;
 941                 }
 942                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 943                         QETH_CARD_TEXT(card, 2, "AFFE");
 944                         return 1;
 945                 }
 946                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 947                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 948                         return 0;
 949                 }
 950                 QETH_CARD_TEXT(card, 2, "DGENCHK");
 951                         return 1;
 952         }
 953         return 0;
 954 }
 955
 956 static int qeth_check_irb_error(struct qeth_card *card, struct ccw_device *cdev,
 957                                 struct irb *irb)
 958 {
 959         if (!IS_ERR(irb))
 960                 return 0;
 961
 962         switch (PTR_ERR(irb)) {
 963         case -EIO:
 964                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
 965                                  CCW_DEVID(cdev));
 966                 QETH_CARD_TEXT(card, 2, "ckirberr");
 967                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 968                 return -EIO;
 969         case -ETIMEDOUT:
 970                 dev_warn(&cdev->dev, "A hardware operation timed out"
 971                         " on the device\n");
 972                 QETH_CARD_TEXT(card, 2, "ckirberr");
 973                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
 974                 return -ETIMEDOUT;
 975         default:
 976                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
 977                                  PTR_ERR(irb), CCW_DEVID(cdev));
 978                 QETH_CARD_TEXT(card, 2, "ckirberr");
 979                 QETH_CARD_TEXT(card, 2, "  rc???");
 980                 return PTR_ERR(irb);
 981         }
 982 }
 983
 984 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
 985                 struct irb *irb)
 986 {
 987         int rc;
 988         int cstat, dstat;
 989         struct qeth_cmd_buffer *iob = NULL;
 990         struct ccwgroup_device *gdev;
 991         struct qeth_channel *channel;
 992         struct qeth_card *card;
 993
 994         /* while we hold the ccwdev lock, this stays valid: */
 995         gdev = dev_get_drvdata(&cdev->dev);
 996         card = dev_get_drvdata(&gdev->dev);
 997         if (!card)
 998                 return;
 999
1000         QETH_CARD_TEXT(card, 5, "irq");
1001
1002         if (card->read.ccwdev == cdev) {
1003                 channel = &card->read;
1004                 QETH_CARD_TEXT(card, 5, "read");
1005         } else if (card->write.ccwdev == cdev) {
1006                 channel = &card->write;
1007                 QETH_CARD_TEXT(card, 5, "write");
1008         } else {
1009                 channel = &card->data;
1010                 QETH_CARD_TEXT(card, 5, "data");
1011         }
1012
1013         if (qeth_intparm_is_iob(intparm))
1014                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1015
1016         rc = qeth_check_irb_error(card, cdev, irb);
1017         if (rc) {
1018                 /* IO was terminated, free its resources. */
1019                 if (iob)
1020                         qeth_cancel_cmd(iob, rc);
1021                 atomic_set(&channel->irq_pending, 0);
1022                 wake_up(&card->wait_q);
1023                 return;
1024         }
1025
1026         atomic_set(&channel->irq_pending, 0);
1027
1028         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1029                 channel->state = CH_STATE_STOPPED;
1030
1031         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1032                 channel->state = CH_STATE_HALTED;
1033
1034         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1035                 QETH_CARD_TEXT(card, 6, "clrchpar");
1036                 /* we don't have to handle this further */
1037                 intparm = 0;
1038         }
1039         if (intparm == QETH_HALT_CHANNEL_PARM) {
1040                 QETH_CARD_TEXT(card, 6, "hltchpar");
1041                 /* we don't have to handle this further */
1042                 intparm = 0;
1043         }
1044
1045         cstat = irb->scsw.cmd.cstat;
1046         dstat = irb->scsw.cmd.dstat;
1047
1048         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1049             (dstat & DEV_STAT_UNIT_CHECK) ||
1050             (cstat)) {
1051                 if (irb->esw.esw0.erw.cons) {
1052                         dev_warn(&channel->ccwdev->dev,
1053                                 "The qeth device driver failed to recover "
1054                                 "an error on the device\n");
1055                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1056                                          CCW_DEVID(channel->ccwdev), cstat,
1057                                          dstat);
1058                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1059                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1060                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1061                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1062                 }
1063
1064                 rc = qeth_get_problem(card, cdev, irb);
1065                 if (rc) {
1066                         card->read_or_write_problem = 1;
1067                         if (iob)
1068                                 qeth_cancel_cmd(iob, rc);
1069                         qeth_clear_ipacmd_list(card);
1070                         qeth_schedule_recovery(card);
1071                         goto out;
1072                 }
1073         }
1074
1075         if (iob && iob->callback)
1076                 iob->callback(card, iob);
1077
1078 out:
1079         wake_up(&card->wait_q);
1080         return;
1081 }
1082
1083 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1084                 struct qeth_qdio_out_buffer *buf,
1085                 enum iucv_tx_notify notification)
1086 {
1087         struct sk_buff *skb;
1088
1089         skb_queue_walk(&buf->skb_list, skb) {
1090                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1091                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1092                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1093                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1094         }
1095 }
1096
1097 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1098 {
1099         struct sk_buff *skb;
1100
1101         /* release may never happen from within CQ tasklet scope */
1102         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1103
1104         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1105                 qeth_notify_skbs(buf->q, buf, TX_NOTIFY_GENERALERROR);
1106
1107         while ((skb = __skb_dequeue(&buf->skb_list)) != NULL)
1108                 consume_skb(skb);
1109 }
1110
1111 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1112                                      struct qeth_qdio_out_buffer *buf)
1113 {
1114         int i;
1115
1116         /* is PCI flag set on buffer? */
1117         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1118                 atomic_dec(&queue->set_pci_flags_count);
1119
1120         qeth_release_skbs(buf);
1121
1122         for (i = 0; i < queue->max_elements; ++i) {
1123                 if (buf->buffer->element[i].addr && buf->is_header[i])
1124                         kmem_cache_free(qeth_core_header_cache,
1125                                 buf->buffer->element[i].addr);
1126                 buf->is_header[i] = 0;
1127         }
1128
1129         qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
1130         buf->next_element_to_fill = 0;
1131         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1132 }
1133
1134 static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
1135 {
1136         int j;
1137
1138         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1139                 if (!q->bufs[j])
1140                         continue;
1141                 qeth_cleanup_handled_pending(q, j, 1);
1142                 qeth_clear_output_buffer(q, q->bufs[j]);
1143                 if (free) {
1144                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1145                         q->bufs[j] = NULL;
1146                 }
1147         }
1148 }
1149
1150 void qeth_drain_output_queues(struct qeth_card *card)
1151 {
1152         int i;
1153
1154         QETH_CARD_TEXT(card, 2, "clearqdbf");
1155         /* clear outbound buffers to free skbs */
1156         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1157                 if (card->qdio.out_qs[i])
1158                         qeth_drain_output_queue(card->qdio.out_qs[i], false);
1159         }
1160 }
1161 EXPORT_SYMBOL_GPL(qeth_drain_output_queues);
1162
1163 static void qeth_free_buffer_pool(struct qeth_card *card)
1164 {
1165         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1166         int i = 0;
1167         list_for_each_entry_safe(pool_entry, tmp,
1168                                  &card->qdio.init_pool.entry_list, init_list){
1169                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1170                         free_page((unsigned long)pool_entry->elements[i]);
1171                 list_del(&pool_entry->init_list);
1172                 kfree(pool_entry);
1173         }
1174 }
1175
1176 static void qeth_clean_channel(struct qeth_channel *channel)
1177 {
1178         struct ccw_device *cdev = channel->ccwdev;
1179
1180         QETH_DBF_TEXT(SETUP, 2, "freech");
1181
1182         spin_lock_irq(get_ccwdev_lock(cdev));
1183         cdev->handler = NULL;
1184         spin_unlock_irq(get_ccwdev_lock(cdev));
1185 }
1186
1187 static void qeth_setup_channel(struct qeth_channel *channel)
1188 {
1189         struct ccw_device *cdev = channel->ccwdev;
1190
1191         QETH_DBF_TEXT(SETUP, 2, "setupch");
1192
1193         channel->state = CH_STATE_DOWN;
1194         atomic_set(&channel->irq_pending, 0);
1195
1196         spin_lock_irq(get_ccwdev_lock(cdev));
1197         cdev->handler = qeth_irq;
1198         spin_unlock_irq(get_ccwdev_lock(cdev));
1199 }
1200
1201 static int qeth_osa_set_output_queues(struct qeth_card *card, bool single)
1202 {
1203         unsigned int count = single ? 1 : card->dev->num_tx_queues;
1204         int rc;
1205
1206         rtnl_lock();
1207         rc = netif_set_real_num_tx_queues(card->dev, count);
1208         rtnl_unlock();
1209
1210         if (rc)
1211                 return rc;
1212
1213         if (card->qdio.no_out_queues == count)
1214                 return 0;
1215
1216         if (atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED)
1217                 qeth_free_qdio_queues(card);
1218
1219         if (count == 1)
1220                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1221
1222         card->qdio.default_out_queue = single ? 0 : QETH_DEFAULT_QUEUE;
1223         card->qdio.no_out_queues = count;
1224         return 0;
1225 }
1226
1227 static int qeth_update_from_chp_desc(struct qeth_card *card)
1228 {
1229         struct ccw_device *ccwdev;
1230         struct channel_path_desc_fmt0 *chp_dsc;
1231         int rc = 0;
1232
1233         QETH_CARD_TEXT(card, 2, "chp_desc");
1234
1235         ccwdev = card->data.ccwdev;
1236         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1237         if (!chp_dsc)
1238                 return -ENOMEM;
1239
1240         card->info.func_level = 0x4100 + chp_dsc->desc;
1241
1242         if (IS_OSD(card) || IS_OSX(card))
1243                 /* CHPP field bit 6 == 1 -> single queue */
1244                 rc = qeth_osa_set_output_queues(card, chp_dsc->chpp & 0x02);
1245
1246         kfree(chp_dsc);
1247         QETH_CARD_TEXT_(card, 2, "nr:%x", card->qdio.no_out_queues);
1248         QETH_CARD_TEXT_(card, 2, "lvl:%02x", card->info.func_level);
1249         return rc;
1250 }
1251
1252 static void qeth_init_qdio_info(struct qeth_card *card)
1253 {
1254         QETH_CARD_TEXT(card, 4, "intqdinf");
1255         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1256         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1257         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1258
1259         /* inbound */
1260         card->qdio.no_in_queues = 1;
1261         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1262         if (IS_IQD(card))
1263                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1264         else
1265                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1266         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1267         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1268         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1269 }
1270
1271 static void qeth_set_initial_options(struct qeth_card *card)
1272 {
1273         card->options.route4.type = NO_ROUTER;
1274         card->options.route6.type = NO_ROUTER;
1275         card->options.rx_sg_cb = QETH_RX_SG_CB;
1276         card->options.isolation = ISOLATION_MODE_NONE;
1277         card->options.cq = QETH_CQ_DISABLED;
1278         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1279 }
1280
1281 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1282 {
1283         unsigned long flags;
1284         int rc = 0;
1285
1286         spin_lock_irqsave(&card->thread_mask_lock, flags);
1287         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1288                         (u8) card->thread_start_mask,
1289                         (u8) card->thread_allowed_mask,
1290                         (u8) card->thread_running_mask);
1291         rc = (card->thread_start_mask & thread);
1292         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1293         return rc;
1294 }
1295
1296 static void qeth_start_kernel_thread(struct work_struct *work)
1297 {
1298         struct task_struct *ts;
1299         struct qeth_card *card = container_of(work, struct qeth_card,
1300                                         kernel_thread_starter);
1301         QETH_CARD_TEXT(card , 2, "strthrd");
1302
1303         if (card->read.state != CH_STATE_UP &&
1304             card->write.state != CH_STATE_UP)
1305                 return;
1306         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1307                 ts = kthread_run(card->discipline->recover, (void *)card,
1308                                 "qeth_recover");
1309                 if (IS_ERR(ts)) {
1310                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1311                         qeth_clear_thread_running_bit(card,
1312                                 QETH_RECOVER_THREAD);
1313                 }
1314         }
1315 }
1316
1317 static void qeth_buffer_reclaim_work(struct work_struct *);
1318 static void qeth_setup_card(struct qeth_card *card)
1319 {
1320         QETH_CARD_TEXT(card, 2, "setupcrd");
1321
1322         card->info.type = CARD_RDEV(card)->id.driver_info;
1323         card->state = CARD_STATE_DOWN;
1324         spin_lock_init(&card->lock);
1325         spin_lock_init(&card->thread_mask_lock);
1326         mutex_init(&card->conf_mutex);
1327         mutex_init(&card->discipline_mutex);
1328         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1329         INIT_LIST_HEAD(&card->cmd_waiter_list);
1330         init_waitqueue_head(&card->wait_q);
1331         qeth_set_initial_options(card);
1332         /* IP address takeover */
1333         INIT_LIST_HEAD(&card->ipato.entries);
1334         qeth_init_qdio_info(card);
1335         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1336         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1337 }
1338
1339 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1340 {
1341         struct qeth_card *card = container_of(slr, struct qeth_card,
1342                                         qeth_service_level);
1343         if (card->info.mcl_level[0])
1344                 seq_printf(m, "qeth: %s firmware level %s\n",
1345                         CARD_BUS_ID(card), card->info.mcl_level);
1346 }
1347
1348 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1349 {
1350         struct qeth_card *card;
1351
1352         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1353         card = kzalloc(sizeof(*card), GFP_KERNEL);
1354         if (!card)
1355                 goto out;
1356         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1357
1358         card->gdev = gdev;
1359         dev_set_drvdata(&gdev->dev, card);
1360         CARD_RDEV(card) = gdev->cdev[0];
1361         CARD_WDEV(card) = gdev->cdev[1];
1362         CARD_DDEV(card) = gdev->cdev[2];
1363
1364         card->event_wq = alloc_ordered_workqueue("%s_event", 0,
1365                                                  dev_name(&gdev->dev));
1366         if (!card->event_wq)
1367                 goto out_wq;
1368
1369         card->read_cmd = qeth_alloc_cmd(&card->read, QETH_BUFSIZE, 1, 0);
1370         if (!card->read_cmd)
1371                 goto out_read_cmd;
1372
1373         qeth_setup_channel(&card->read);
1374         qeth_setup_channel(&card->write);
1375         qeth_setup_channel(&card->data);
1376         card->qeth_service_level.seq_print = qeth_core_sl_print;
1377         register_service_level(&card->qeth_service_level);
1378         return card;
1379
1380 out_read_cmd:
1381         destroy_workqueue(card->event_wq);
1382 out_wq:
1383         dev_set_drvdata(&gdev->dev, NULL);
1384         kfree(card);
1385 out:
1386         return NULL;
1387 }
1388
1389 static int qeth_clear_channel(struct qeth_card *card,
1390                               struct qeth_channel *channel)
1391 {
1392         int rc;
1393
1394         QETH_CARD_TEXT(card, 3, "clearch");
1395         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1396         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1397         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1398
1399         if (rc)
1400                 return rc;
1401         rc = wait_event_interruptible_timeout(card->wait_q,
1402                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1403         if (rc == -ERESTARTSYS)
1404                 return rc;
1405         if (channel->state != CH_STATE_STOPPED)
1406                 return -ETIME;
1407         channel->state = CH_STATE_DOWN;
1408         return 0;
1409 }
1410
1411 static int qeth_halt_channel(struct qeth_card *card,
1412                              struct qeth_channel *channel)
1413 {
1414         int rc;
1415
1416         QETH_CARD_TEXT(card, 3, "haltch");
1417         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1418         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1419         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1420
1421         if (rc)
1422                 return rc;
1423         rc = wait_event_interruptible_timeout(card->wait_q,
1424                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1425         if (rc == -ERESTARTSYS)
1426                 return rc;
1427         if (channel->state != CH_STATE_HALTED)
1428                 return -ETIME;
1429         return 0;
1430 }
1431
1432 static int qeth_halt_channels(struct qeth_card *card)
1433 {
1434         int rc1 = 0, rc2 = 0, rc3 = 0;
1435
1436         QETH_CARD_TEXT(card, 3, "haltchs");
1437         rc1 = qeth_halt_channel(card, &card->read);
1438         rc2 = qeth_halt_channel(card, &card->write);
1439         rc3 = qeth_halt_channel(card, &card->data);
1440         if (rc1)
1441                 return rc1;
1442         if (rc2)
1443                 return rc2;
1444         return rc3;
1445 }
1446
1447 static int qeth_clear_channels(struct qeth_card *card)
1448 {
1449         int rc1 = 0, rc2 = 0, rc3 = 0;
1450
1451         QETH_CARD_TEXT(card, 3, "clearchs");
1452         rc1 = qeth_clear_channel(card, &card->read);
1453         rc2 = qeth_clear_channel(card, &card->write);
1454         rc3 = qeth_clear_channel(card, &card->data);
1455         if (rc1)
1456                 return rc1;
1457         if (rc2)
1458                 return rc2;
1459         return rc3;
1460 }
1461
1462 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1463 {
1464         int rc = 0;
1465
1466         QETH_CARD_TEXT(card, 3, "clhacrd");
1467
1468         if (halt)
1469                 rc = qeth_halt_channels(card);
1470         if (rc)
1471                 return rc;
1472         return qeth_clear_channels(card);
1473 }
1474
1475 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1476 {
1477         int rc = 0;
1478
1479         QETH_CARD_TEXT(card, 3, "qdioclr");
1480         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1481                 QETH_QDIO_CLEANING)) {
1482         case QETH_QDIO_ESTABLISHED:
1483                 if (IS_IQD(card))
1484                         rc = qdio_shutdown(CARD_DDEV(card),
1485                                 QDIO_FLAG_CLEANUP_USING_HALT);
1486                 else
1487                         rc = qdio_shutdown(CARD_DDEV(card),
1488                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1489                 if (rc)
1490                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1491                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1492                 break;
1493         case QETH_QDIO_CLEANING:
1494                 return rc;
1495         default:
1496                 break;
1497         }
1498         rc = qeth_clear_halt_card(card, use_halt);
1499         if (rc)
1500                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1501         card->state = CARD_STATE_DOWN;
1502         return rc;
1503 }
1504 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1505
1506 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1507 {
1508         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1509         struct diag26c_vnic_resp *response = NULL;
1510         struct diag26c_vnic_req *request = NULL;
1511         struct ccw_dev_id id;
1512         char userid[80];
1513         int rc = 0;
1514
1515         QETH_CARD_TEXT(card, 2, "vmlayer");
1516
1517         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1518         if (rc)
1519                 goto out;
1520
1521         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1522         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1523         if (!request || !response) {
1524                 rc = -ENOMEM;
1525                 goto out;
1526         }
1527
1528         ccw_device_get_id(CARD_RDEV(card), &id);
1529         request->resp_buf_len = sizeof(*response);
1530         request->resp_version = DIAG26C_VERSION6_VM65918;
1531         request->req_format = DIAG26C_VNIC_INFO;
1532         ASCEBC(userid, 8);
1533         memcpy(&request->sys_name, userid, 8);
1534         request->devno = id.devno;
1535
1536         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1537         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1538         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1539         if (rc)
1540                 goto out;
1541         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1542
1543         if (request->resp_buf_len < sizeof(*response) ||
1544             response->version != request->resp_version) {
1545                 rc = -EIO;
1546                 goto out;
1547         }
1548
1549         if (response->protocol == VNIC_INFO_PROT_L2)
1550                 disc = QETH_DISCIPLINE_LAYER2;
1551         else if (response->protocol == VNIC_INFO_PROT_L3)
1552                 disc = QETH_DISCIPLINE_LAYER3;
1553
1554 out:
1555         kfree(response);
1556         kfree(request);
1557         if (rc)
1558                 QETH_CARD_TEXT_(card, 2, "err%x", rc);
1559         return disc;
1560 }
1561
1562 /* Determine whether the device requires a specific layer discipline */
1563 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1564 {
1565         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1566
1567         if (IS_OSM(card) || IS_OSN(card))
1568                 disc = QETH_DISCIPLINE_LAYER2;
1569         else if (IS_VM_NIC(card))
1570                 disc = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
1571                                       qeth_vm_detect_layer(card);
1572
1573         switch (disc) {
1574         case QETH_DISCIPLINE_LAYER2:
1575                 QETH_CARD_TEXT(card, 3, "force l2");
1576                 break;
1577         case QETH_DISCIPLINE_LAYER3:
1578                 QETH_CARD_TEXT(card, 3, "force l3");
1579                 break;
1580         default:
1581                 QETH_CARD_TEXT(card, 3, "force no");
1582         }
1583
1584         return disc;
1585 }
1586
1587 static void qeth_set_blkt_defaults(struct qeth_card *card)
1588 {
1589         QETH_CARD_TEXT(card, 2, "cfgblkt");
1590
1591         if (card->info.use_v1_blkt) {
1592                 card->info.blkt.time_total = 0;
1593                 card->info.blkt.inter_packet = 0;
1594                 card->info.blkt.inter_packet_jumbo = 0;
1595         } else {
1596                 card->info.blkt.time_total = 250;
1597                 card->info.blkt.inter_packet = 5;
1598                 card->info.blkt.inter_packet_jumbo = 15;
1599         }
1600 }
1601
1602 static void qeth_init_tokens(struct qeth_card *card)
1603 {
1604         card->token.issuer_rm_w = 0x00010103UL;
1605         card->token.cm_filter_w = 0x00010108UL;
1606         card->token.cm_connection_w = 0x0001010aUL;
1607         card->token.ulp_filter_w = 0x0001010bUL;
1608         card->token.ulp_connection_w = 0x0001010dUL;
1609 }
1610
1611 static void qeth_init_func_level(struct qeth_card *card)
1612 {
1613         switch (card->info.type) {
1614         case QETH_CARD_TYPE_IQD:
1615                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1616                 break;
1617         case QETH_CARD_TYPE_OSD:
1618         case QETH_CARD_TYPE_OSN:
1619                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1620                 break;
1621         default:
1622                 break;
1623         }
1624 }
1625
1626 static void qeth_idx_finalize_cmd(struct qeth_card *card,
1627                                   struct qeth_cmd_buffer *iob)
1628 {
1629         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data), &card->seqno.trans_hdr,
1630                QETH_SEQ_NO_LENGTH);
1631         if (iob->channel == &card->write)
1632                 card->seqno.trans_hdr++;
1633 }
1634
1635 static int qeth_peer_func_level(int level)
1636 {
1637         if ((level & 0xff) == 8)
1638                 return (level & 0xff) + 0x400;
1639         if (((level >> 8) & 3) == 1)
1640                 return (level & 0xff) + 0x200;
1641         return level;
1642 }
1643
1644 static void qeth_mpc_finalize_cmd(struct qeth_card *card,
1645                                   struct qeth_cmd_buffer *iob)
1646 {
1647         qeth_idx_finalize_cmd(card, iob);
1648
1649         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
1650                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
1651         card->seqno.pdu_hdr++;
1652         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
1653                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
1654
1655         iob->reply->seqno = QETH_IDX_COMMAND_SEQNO;
1656         iob->callback = qeth_release_buffer_cb;
1657 }
1658
1659 static struct qeth_cmd_buffer *qeth_mpc_alloc_cmd(struct qeth_card *card,
1660                                                   void *data,
1661                                                   unsigned int data_length)
1662 {
1663         struct qeth_cmd_buffer *iob;
1664
1665         iob = qeth_alloc_cmd(&card->write, data_length, 1, QETH_TIMEOUT);
1666         if (!iob)
1667                 return NULL;
1668
1669         memcpy(iob->data, data, data_length);
1670         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, data_length,
1671                        iob->data);
1672         iob->finalize = qeth_mpc_finalize_cmd;
1673         return iob;
1674 }
1675
1676 /**
1677  * qeth_send_control_data() -   send control command to the card
1678  * @card:                       qeth_card structure pointer
1679  * @iob:                        qeth_cmd_buffer pointer
1680  * @reply_cb:                   callback function pointer
1681  * @cb_card:                    pointer to the qeth_card structure
1682  * @cb_reply:                   pointer to the qeth_reply structure
1683  * @cb_cmd:                     pointer to the original iob for non-IPA
1684  *                              commands, or to the qeth_ipa_cmd structure
1685  *                              for the IPA commands.
1686  * @reply_param:                private pointer passed to the callback
1687  *
1688  * Callback function gets called one or more times, with cb_cmd
1689  * pointing to the response returned by the hardware. Callback
1690  * function must return
1691  *   > 0 if more reply blocks are expected,
1692  *     0 if the last or only reply block is received, and
1693  *   < 0 on error.
1694  * Callback function can get the value of the reply_param pointer from the
1695  * field 'param' of the structure qeth_reply.
1696  */
1697
1698 static int qeth_send_control_data(struct qeth_card *card,
1699                                   struct qeth_cmd_buffer *iob,
1700                                   int (*reply_cb)(struct qeth_card *cb_card,
1701                                                   struct qeth_reply *cb_reply,
1702                                                   unsigned long cb_cmd),
1703                                   void *reply_param)
1704 {
1705         struct qeth_channel *channel = iob->channel;
1706         long timeout = iob->timeout;
1707         int rc;
1708         struct qeth_reply *reply = NULL;
1709
1710         QETH_CARD_TEXT(card, 2, "sendctl");
1711
1712         reply = qeth_alloc_reply(card);
1713         if (!reply) {
1714                 qeth_put_cmd(iob);
1715                 return -ENOMEM;
1716         }
1717         reply->callback = reply_cb;
1718         reply->param = reply_param;
1719
1720         /* pairs with qeth_put_cmd(): */
1721         qeth_get_reply(reply);
1722         iob->reply = reply;
1723
1724         timeout = wait_event_interruptible_timeout(card->wait_q,
1725                                                    qeth_trylock_channel(channel),
1726                                                    timeout);
1727         if (timeout <= 0) {
1728                 qeth_put_reply(reply);
1729                 qeth_put_cmd(iob);
1730                 return (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1731         }
1732
1733         if (iob->finalize)
1734                 iob->finalize(card, iob);
1735         QETH_DBF_HEX(CTRL, 2, iob->data, min(iob->length, QETH_DBF_CTRL_LEN));
1736
1737         qeth_enqueue_reply(card, reply);
1738
1739         QETH_CARD_TEXT(card, 6, "noirqpnd");
1740         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1741         rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
1742                                       (addr_t) iob, 0, 0, timeout);
1743         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1744         if (rc) {
1745                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
1746                                  CARD_DEVID(card), rc);
1747                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1748                 qeth_dequeue_reply(card, reply);
1749                 qeth_put_reply(reply);
1750                 qeth_put_cmd(iob);
1751                 atomic_set(&channel->irq_pending, 0);
1752                 wake_up(&card->wait_q);
1753                 return rc;
1754         }
1755
1756         timeout = wait_for_completion_interruptible_timeout(&reply->received,
1757                                                             timeout);
1758         if (timeout <= 0)
1759                 rc = (timeout == -ERESTARTSYS) ? -EINTR : -ETIME;
1760
1761         qeth_dequeue_reply(card, reply);
1762
1763         if (reply_cb) {
1764                 /* Wait until the callback for a late reply has completed: */
1765                 spin_lock_irq(&reply->lock);
1766                 if (rc)
1767                         /* Zap any callback that's still pending: */
1768                         reply->rc = rc;
1769                 spin_unlock_irq(&reply->lock);
1770         }
1771
1772         if (!rc)
1773                 rc = reply->rc;
1774         qeth_put_reply(reply);
1775         return rc;
1776 }
1777
1778 static void qeth_read_conf_data_cb(struct qeth_card *card,
1779                                    struct qeth_cmd_buffer *iob)
1780 {
1781         unsigned char *prcd = iob->data;
1782
1783         QETH_CARD_TEXT(card, 2, "cfgunit");
1784         card->info.chpid = prcd[30];
1785         card->info.unit_addr2 = prcd[31];
1786         card->info.cula = prcd[63];
1787         card->info.is_vm_nic = ((prcd[0x10] == _ascebc['V']) &&
1788                                 (prcd[0x11] == _ascebc['M']));
1789         card->info.use_v1_blkt = prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1790                                  prcd[76] >= 0xF1 && prcd[76] <= 0xF4;
1791
1792         qeth_notify_reply(iob->reply, 0);
1793         qeth_put_cmd(iob);
1794 }
1795
1796 static int qeth_read_conf_data(struct qeth_card *card)
1797 {
1798         struct qeth_channel *channel = &card->data;
1799         struct qeth_cmd_buffer *iob;
1800         struct ciw *ciw;
1801
1802         /* scan for RCD command in extended SenseID data */
1803         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1804         if (!ciw || ciw->cmd == 0)
1805                 return -EOPNOTSUPP;
1806
1807         iob = qeth_alloc_cmd(channel, ciw->count, 1, QETH_RCD_TIMEOUT);
1808         if (!iob)
1809                 return -ENOMEM;
1810
1811         iob->callback = qeth_read_conf_data_cb;
1812         qeth_setup_ccw(__ccw_from_cmd(iob), ciw->cmd, 0, iob->length,
1813                        iob->data);
1814
1815         return qeth_send_control_data(card, iob, NULL, NULL);
1816 }
1817
1818 static int qeth_idx_check_activate_response(struct qeth_card *card,
1819                                             struct qeth_channel *channel,
1820                                             struct qeth_cmd_buffer *iob)
1821 {
1822         int rc;
1823
1824         rc = qeth_check_idx_response(card, iob->data);
1825         if (rc)
1826                 return rc;
1827
1828         if (QETH_IS_IDX_ACT_POS_REPLY(iob->data))
1829                 return 0;
1830
1831         /* negative reply: */
1832         QETH_CARD_TEXT_(card, 2, "idxneg%c",
1833                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1834
1835         switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1836         case QETH_IDX_ACT_ERR_EXCL:
1837                 dev_err(&channel->ccwdev->dev,
1838                         "The adapter is used exclusively by another host\n");
1839                 return -EBUSY;
1840         case QETH_IDX_ACT_ERR_AUTH:
1841         case QETH_IDX_ACT_ERR_AUTH_USER:
1842                 dev_err(&channel->ccwdev->dev,
1843                         "Setting the device online failed because of insufficient authorization\n");
1844                 return -EPERM;
1845         default:
1846                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1847                                  CCW_DEVID(channel->ccwdev));
1848                 return -EIO;
1849         }
1850 }
1851
1852 static void qeth_idx_activate_read_channel_cb(struct qeth_card *card,
1853                                               struct qeth_cmd_buffer *iob)
1854 {
1855         struct qeth_channel *channel = iob->channel;
1856         u16 peer_level;
1857         int rc;
1858
1859         QETH_CARD_TEXT(card, 2, "idxrdcb");
1860
1861         rc = qeth_idx_check_activate_response(card, channel, iob);
1862         if (rc)
1863                 goto out;
1864
1865         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1866         if (peer_level != qeth_peer_func_level(card->info.func_level)) {
1867                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1868                                  CCW_DEVID(channel->ccwdev),
1869                                  card->info.func_level, peer_level);
1870                 rc = -EINVAL;
1871                 goto out;
1872         }
1873
1874         memcpy(&card->token.issuer_rm_r,
1875                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1876                QETH_MPC_TOKEN_LENGTH);
1877         memcpy(&card->info.mcl_level[0],
1878                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1879
1880 out:
1881         qeth_notify_reply(iob->reply, rc);
1882         qeth_put_cmd(iob);
1883 }
1884
1885 static void qeth_idx_activate_write_channel_cb(struct qeth_card *card,
1886                                                struct qeth_cmd_buffer *iob)
1887 {
1888         struct qeth_channel *channel = iob->channel;
1889         u16 peer_level;
1890         int rc;
1891
1892         QETH_CARD_TEXT(card, 2, "idxwrcb");
1893
1894         rc = qeth_idx_check_activate_response(card, channel, iob);
1895         if (rc)
1896                 goto out;
1897
1898         memcpy(&peer_level, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1899         if ((peer_level & ~0x0100) !=
1900             qeth_peer_func_level(card->info.func_level)) {
1901                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1902                                  CCW_DEVID(channel->ccwdev),
1903                                  card->info.func_level, peer_level);
1904                 rc = -EINVAL;
1905         }
1906
1907 out:
1908         qeth_notify_reply(iob->reply, rc);
1909         qeth_put_cmd(iob);
1910 }
1911
1912 static void qeth_idx_setup_activate_cmd(struct qeth_card *card,
1913                                         struct qeth_cmd_buffer *iob)
1914 {
1915         u16 addr = (card->info.cula << 8) + card->info.unit_addr2;
1916         u8 port = ((u8)card->dev->dev_port) | 0x80;
1917         struct ccw1 *ccw = __ccw_from_cmd(iob);
1918         struct ccw_dev_id dev_id;
1919
1920         qeth_setup_ccw(&ccw[0], CCW_CMD_WRITE, CCW_FLAG_CC, IDX_ACTIVATE_SIZE,
1921                        iob->data);
1922         qeth_setup_ccw(&ccw[1], CCW_CMD_READ, 0, iob->length, iob->data);
1923         ccw_device_get_id(CARD_DDEV(card), &dev_id);
1924         iob->finalize = qeth_idx_finalize_cmd;
1925
1926         memcpy(QETH_IDX_ACT_PNO(iob->data), &port, 1);
1927         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1928                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1929         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1930                &card->info.func_level, 2);
1931         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &dev_id.devno, 2);
1932         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &addr, 2);
1933 }
1934
1935 static int qeth_idx_activate_read_channel(struct qeth_card *card)
1936 {
1937         struct qeth_channel *channel = &card->read;
1938         struct qeth_cmd_buffer *iob;
1939         int rc;
1940
1941         QETH_CARD_TEXT(card, 2, "idxread");
1942
1943         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1944         if (!iob)
1945                 return -ENOMEM;
1946
1947         memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1948         qeth_idx_setup_activate_cmd(card, iob);
1949         iob->callback = qeth_idx_activate_read_channel_cb;
1950
1951         rc = qeth_send_control_data(card, iob, NULL, NULL);
1952         if (rc)
1953                 return rc;
1954
1955         channel->state = CH_STATE_UP;
1956         return 0;
1957 }
1958
1959 static int qeth_idx_activate_write_channel(struct qeth_card *card)
1960 {
1961         struct qeth_channel *channel = &card->write;
1962         struct qeth_cmd_buffer *iob;
1963         int rc;
1964
1965         QETH_CARD_TEXT(card, 2, "idxwrite");
1966
1967         iob = qeth_alloc_cmd(channel, QETH_BUFSIZE, 2, QETH_TIMEOUT);
1968         if (!iob)
1969                 return -ENOMEM;
1970
1971         memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1972         qeth_idx_setup_activate_cmd(card, iob);
1973         iob->callback = qeth_idx_activate_write_channel_cb;
1974
1975         rc = qeth_send_control_data(card, iob, NULL, NULL);
1976         if (rc)
1977                 return rc;
1978
1979         channel->state = CH_STATE_UP;
1980         return 0;
1981 }
1982
1983 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
1984                 unsigned long data)
1985 {
1986         struct qeth_cmd_buffer *iob;
1987
1988         QETH_CARD_TEXT(card, 2, "cmenblcb");
1989
1990         iob = (struct qeth_cmd_buffer *) data;
1991         memcpy(&card->token.cm_filter_r,
1992                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
1993                QETH_MPC_TOKEN_LENGTH);
1994         return 0;
1995 }
1996
1997 static int qeth_cm_enable(struct qeth_card *card)
1998 {
1999         struct qeth_cmd_buffer *iob;
2000
2001         QETH_CARD_TEXT(card, 2, "cmenable");
2002
2003         iob = qeth_mpc_alloc_cmd(card, CM_ENABLE, CM_ENABLE_SIZE);
2004         if (!iob)
2005                 return -ENOMEM;
2006
2007         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2008                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2009         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2010                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2011
2012         return qeth_send_control_data(card, iob, qeth_cm_enable_cb, NULL);
2013 }
2014
2015 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2016                 unsigned long data)
2017 {
2018         struct qeth_cmd_buffer *iob;
2019
2020         QETH_CARD_TEXT(card, 2, "cmsetpcb");
2021
2022         iob = (struct qeth_cmd_buffer *) data;
2023         memcpy(&card->token.cm_connection_r,
2024                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2025                QETH_MPC_TOKEN_LENGTH);
2026         return 0;
2027 }
2028
2029 static int qeth_cm_setup(struct qeth_card *card)
2030 {
2031         struct qeth_cmd_buffer *iob;
2032
2033         QETH_CARD_TEXT(card, 2, "cmsetup");
2034
2035         iob = qeth_mpc_alloc_cmd(card, CM_SETUP, CM_SETUP_SIZE);
2036         if (!iob)
2037                 return -ENOMEM;
2038
2039         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2040                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2041         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2042                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2043         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2044                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2045         return qeth_send_control_data(card, iob, qeth_cm_setup_cb, NULL);
2046 }
2047
2048 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2049 {
2050         struct net_device *dev = card->dev;
2051         unsigned int new_mtu;
2052
2053         if (!max_mtu) {
2054                 /* IQD needs accurate max MTU to set up its RX buffers: */
2055                 if (IS_IQD(card))
2056                         return -EINVAL;
2057                 /* tolerate quirky HW: */
2058                 max_mtu = ETH_MAX_MTU;
2059         }
2060
2061         rtnl_lock();
2062         if (IS_IQD(card)) {
2063                 /* move any device with default MTU to new max MTU: */
2064                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2065
2066                 /* adjust RX buffer size to new max MTU: */
2067                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2068                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2069                         qeth_free_qdio_queues(card);
2070         } else {
2071                 if (dev->mtu)
2072                         new_mtu = dev->mtu;
2073                 /* default MTUs for first setup: */
2074                 else if (IS_LAYER2(card))
2075                         new_mtu = ETH_DATA_LEN;
2076                 else
2077                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2078         }
2079
2080         dev->max_mtu = max_mtu;
2081         dev->mtu = min(new_mtu, max_mtu);
2082         rtnl_unlock();
2083         return 0;
2084 }
2085
2086 static int qeth_get_mtu_outof_framesize(int framesize)
2087 {
2088         switch (framesize) {
2089         case 0x4000:
2090                 return 8192;
2091         case 0x6000:
2092                 return 16384;
2093         case 0xa000:
2094                 return 32768;
2095         case 0xffff:
2096                 return 57344;
2097         default:
2098                 return 0;
2099         }
2100 }
2101
2102 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2103                 unsigned long data)
2104 {
2105         __u16 mtu, framesize;
2106         __u16 len;
2107         __u8 link_type;
2108         struct qeth_cmd_buffer *iob;
2109
2110         QETH_CARD_TEXT(card, 2, "ulpenacb");
2111
2112         iob = (struct qeth_cmd_buffer *) data;
2113         memcpy(&card->token.ulp_filter_r,
2114                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2115                QETH_MPC_TOKEN_LENGTH);
2116         if (IS_IQD(card)) {
2117                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2118                 mtu = qeth_get_mtu_outof_framesize(framesize);
2119         } else {
2120                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2121         }
2122         *(u16 *)reply->param = mtu;
2123
2124         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2125         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2126                 memcpy(&link_type,
2127                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2128                 card->info.link_type = link_type;
2129         } else
2130                 card->info.link_type = 0;
2131         QETH_CARD_TEXT_(card, 2, "link%d", card->info.link_type);
2132         return 0;
2133 }
2134
2135 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2136 {
2137         if (IS_OSN(card))
2138                 return QETH_PROT_OSN2;
2139         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2140 }
2141
2142 static int qeth_ulp_enable(struct qeth_card *card)
2143 {
2144         u8 prot_type = qeth_mpc_select_prot_type(card);
2145         struct qeth_cmd_buffer *iob;
2146         u16 max_mtu;
2147         int rc;
2148
2149         QETH_CARD_TEXT(card, 2, "ulpenabl");
2150
2151         iob = qeth_mpc_alloc_cmd(card, ULP_ENABLE, ULP_ENABLE_SIZE);
2152         if (!iob)
2153                 return -ENOMEM;
2154
2155         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2156         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2157         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2158                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2159         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2160                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2161         rc = qeth_send_control_data(card, iob, qeth_ulp_enable_cb, &max_mtu);
2162         if (rc)
2163                 return rc;
2164         return qeth_update_max_mtu(card, max_mtu);
2165 }
2166
2167 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2168                 unsigned long data)
2169 {
2170         struct qeth_cmd_buffer *iob;
2171
2172         QETH_CARD_TEXT(card, 2, "ulpstpcb");
2173
2174         iob = (struct qeth_cmd_buffer *) data;
2175         memcpy(&card->token.ulp_connection_r,
2176                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2177                QETH_MPC_TOKEN_LENGTH);
2178         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2179                      3)) {
2180                 QETH_CARD_TEXT(card, 2, "olmlimit");
2181                 dev_err(&card->gdev->dev, "A connection could not be "
2182                         "established because of an OLM limit\n");
2183                 return -EMLINK;
2184         }
2185         return 0;
2186 }
2187
2188 static int qeth_ulp_setup(struct qeth_card *card)
2189 {
2190         __u16 temp;
2191         struct qeth_cmd_buffer *iob;
2192         struct ccw_dev_id dev_id;
2193
2194         QETH_CARD_TEXT(card, 2, "ulpsetup");
2195
2196         iob = qeth_mpc_alloc_cmd(card, ULP_SETUP, ULP_SETUP_SIZE);
2197         if (!iob)
2198                 return -ENOMEM;
2199
2200         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2201                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2202         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2203                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2204         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2205                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2206
2207         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2208         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2209         temp = (card->info.cula << 8) + card->info.unit_addr2;
2210         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2211         return qeth_send_control_data(card, iob, qeth_ulp_setup_cb, NULL);
2212 }
2213
2214 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2215 {
2216         struct qeth_qdio_out_buffer *newbuf;
2217
2218         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2219         if (!newbuf)
2220                 return -ENOMEM;
2221
2222         newbuf->buffer = q->qdio_bufs[bidx];
2223         skb_queue_head_init(&newbuf->skb_list);
2224         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2225         newbuf->q = q;
2226         newbuf->next_pending = q->bufs[bidx];
2227         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2228         q->bufs[bidx] = newbuf;
2229         return 0;
2230 }
2231
2232 static void qeth_free_output_queue(struct qeth_qdio_out_q *q)
2233 {
2234         if (!q)
2235                 return;
2236
2237         qeth_drain_output_queue(q, true);
2238         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2239         kfree(q);
2240 }
2241
2242 static struct qeth_qdio_out_q *qeth_alloc_output_queue(void)
2243 {
2244         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2245
2246         if (!q)
2247                 return NULL;
2248
2249         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2250                 kfree(q);
2251                 return NULL;
2252         }
2253         return q;
2254 }
2255
2256 static int qeth_alloc_qdio_queues(struct qeth_card *card)
2257 {
2258         int i, j;
2259
2260         QETH_CARD_TEXT(card, 2, "allcqdbf");
2261
2262         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2263                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2264                 return 0;
2265
2266         QETH_CARD_TEXT(card, 2, "inq");
2267         card->qdio.in_q = qeth_alloc_qdio_queue();
2268         if (!card->qdio.in_q)
2269                 goto out_nomem;
2270
2271         /* inbound buffer pool */
2272         if (qeth_alloc_buffer_pool(card))
2273                 goto out_freeinq;
2274
2275         /* outbound */
2276         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2277                 card->qdio.out_qs[i] = qeth_alloc_output_queue();
2278                 if (!card->qdio.out_qs[i])
2279                         goto out_freeoutq;
2280                 QETH_CARD_TEXT_(card, 2, "outq %i", i);
2281                 QETH_CARD_HEX(card, 2, &card->qdio.out_qs[i], sizeof(void *));
2282                 card->qdio.out_qs[i]->card = card;
2283                 card->qdio.out_qs[i]->queue_no = i;
2284                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2285                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2286                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2287                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2288                                 goto out_freeoutqbufs;
2289                 }
2290         }
2291
2292         /* completion */
2293         if (qeth_alloc_cq(card))
2294                 goto out_freeoutq;
2295
2296         return 0;
2297
2298 out_freeoutqbufs:
2299         while (j > 0) {
2300                 --j;
2301                 kmem_cache_free(qeth_qdio_outbuf_cache,
2302                                 card->qdio.out_qs[i]->bufs[j]);
2303                 card->qdio.out_qs[i]->bufs[j] = NULL;
2304         }
2305 out_freeoutq:
2306         while (i > 0) {
2307                 qeth_free_output_queue(card->qdio.out_qs[--i]);
2308                 card->qdio.out_qs[i] = NULL;
2309         }
2310         qeth_free_buffer_pool(card);
2311 out_freeinq:
2312         qeth_free_qdio_queue(card->qdio.in_q);
2313         card->qdio.in_q = NULL;
2314 out_nomem:
2315         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2316         return -ENOMEM;
2317 }
2318
2319 static void qeth_free_qdio_queues(struct qeth_card *card)
2320 {
2321         int i, j;
2322
2323         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2324                 QETH_QDIO_UNINITIALIZED)
2325                 return;
2326
2327         qeth_free_cq(card);
2328         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2329         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2330                 if (card->qdio.in_q->bufs[j].rx_skb)
2331                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2332         }
2333         qeth_free_qdio_queue(card->qdio.in_q);
2334         card->qdio.in_q = NULL;
2335         /* inbound buffer pool */
2336         qeth_free_buffer_pool(card);
2337         /* free outbound qdio_qs */
2338         for (i = 0; i < card->qdio.no_out_queues; i++) {
2339                 qeth_free_output_queue(card->qdio.out_qs[i]);
2340                 card->qdio.out_qs[i] = NULL;
2341         }
2342 }
2343
2344 static void qeth_create_qib_param_field(struct qeth_card *card,
2345                 char *param_field)
2346 {
2347
2348         param_field[0] = _ascebc['P'];
2349         param_field[1] = _ascebc['C'];
2350         param_field[2] = _ascebc['I'];
2351         param_field[3] = _ascebc['T'];
2352         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2353         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2354         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2355 }
2356
2357 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2358                 char *param_field)
2359 {
2360         param_field[16] = _ascebc['B'];
2361         param_field[17] = _ascebc['L'];
2362         param_field[18] = _ascebc['K'];
2363         param_field[19] = _ascebc['T'];
2364         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2365         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2366         *((unsigned int *) (&param_field[28])) =
2367                 card->info.blkt.inter_packet_jumbo;
2368 }
2369
2370 static int qeth_qdio_activate(struct qeth_card *card)
2371 {
2372         QETH_CARD_TEXT(card, 3, "qdioact");
2373         return qdio_activate(CARD_DDEV(card));
2374 }
2375
2376 static int qeth_dm_act(struct qeth_card *card)
2377 {
2378         struct qeth_cmd_buffer *iob;
2379
2380         QETH_CARD_TEXT(card, 2, "dmact");
2381
2382         iob = qeth_mpc_alloc_cmd(card, DM_ACT, DM_ACT_SIZE);
2383         if (!iob)
2384                 return -ENOMEM;
2385
2386         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2387                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2388         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2389                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2390         return qeth_send_control_data(card, iob, NULL, NULL);
2391 }
2392
2393 static int qeth_mpc_initialize(struct qeth_card *card)
2394 {
2395         int rc;
2396
2397         QETH_CARD_TEXT(card, 2, "mpcinit");
2398
2399         rc = qeth_issue_next_read(card);
2400         if (rc) {
2401                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2402                 return rc;
2403         }
2404         rc = qeth_cm_enable(card);
2405         if (rc) {
2406                 QETH_CARD_TEXT_(card, 2, "2err%d", rc);
2407                 goto out_qdio;
2408         }
2409         rc = qeth_cm_setup(card);
2410         if (rc) {
2411                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2412                 goto out_qdio;
2413         }
2414         rc = qeth_ulp_enable(card);
2415         if (rc) {
2416                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
2417                 goto out_qdio;
2418         }
2419         rc = qeth_ulp_setup(card);
2420         if (rc) {
2421                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2422                 goto out_qdio;
2423         }
2424         rc = qeth_alloc_qdio_queues(card);
2425         if (rc) {
2426                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
2427                 goto out_qdio;
2428         }
2429         rc = qeth_qdio_establish(card);
2430         if (rc) {
2431                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2432                 qeth_free_qdio_queues(card);
2433                 goto out_qdio;
2434         }
2435         rc = qeth_qdio_activate(card);
2436         if (rc) {
2437                 QETH_CARD_TEXT_(card, 2, "7err%d", rc);
2438                 goto out_qdio;
2439         }
2440         rc = qeth_dm_act(card);
2441         if (rc) {
2442                 QETH_CARD_TEXT_(card, 2, "8err%d", rc);
2443                 goto out_qdio;
2444         }
2445
2446         return 0;
2447 out_qdio:
2448         qeth_qdio_clear_card(card, !IS_IQD(card));
2449         qdio_free(CARD_DDEV(card));
2450         return rc;
2451 }
2452
2453 void qeth_print_status_message(struct qeth_card *card)
2454 {
2455         switch (card->info.type) {
2456         case QETH_CARD_TYPE_OSD:
2457         case QETH_CARD_TYPE_OSM:
2458         case QETH_CARD_TYPE_OSX:
2459                 /* VM will use a non-zero first character
2460                  * to indicate a HiperSockets like reporting
2461                  * of the level OSA sets the first character to zero
2462                  * */
2463                 if (!card->info.mcl_level[0]) {
2464                         sprintf(card->info.mcl_level, "%02x%02x",
2465                                 card->info.mcl_level[2],
2466                                 card->info.mcl_level[3]);
2467                         break;
2468                 }
2469                 /* fallthrough */
2470         case QETH_CARD_TYPE_IQD:
2471                 if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
2472                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2473                                 card->info.mcl_level[0]];
2474                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2475                                 card->info.mcl_level[1]];
2476                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2477                                 card->info.mcl_level[2]];
2478                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2479                                 card->info.mcl_level[3]];
2480                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2481                 }
2482                 break;
2483         default:
2484                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2485         }
2486         dev_info(&card->gdev->dev,
2487                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2488                  qeth_get_cardname(card),
2489                  (card->info.mcl_level[0]) ? " (level: " : "",
2490                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2491                  (card->info.mcl_level[0]) ? ")" : "",
2492                  qeth_get_cardname_short(card));
2493 }
2494 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2495
2496 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2497 {
2498         struct qeth_buffer_pool_entry *entry;
2499
2500         QETH_CARD_TEXT(card, 5, "inwrklst");
2501
2502         list_for_each_entry(entry,
2503                             &card->qdio.init_pool.entry_list, init_list) {
2504                 qeth_put_buffer_pool_entry(card, entry);
2505         }
2506 }
2507
2508 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2509                                         struct qeth_card *card)
2510 {
2511         struct list_head *plh;
2512         struct qeth_buffer_pool_entry *entry;
2513         int i, free;
2514         struct page *page;
2515
2516         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2517                 return NULL;
2518
2519         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2520                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2521                 free = 1;
2522                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2523                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2524                                 free = 0;
2525                                 break;
2526                         }
2527                 }
2528                 if (free) {
2529                         list_del_init(&entry->list);
2530                         return entry;
2531                 }
2532         }
2533
2534         /* no free buffer in pool so take first one and swap pages */
2535         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2536                         struct qeth_buffer_pool_entry, list);
2537         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2538                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2539                         page = alloc_page(GFP_ATOMIC);
2540                         if (!page) {
2541                                 return NULL;
2542                         } else {
2543                                 free_page((unsigned long)entry->elements[i]);
2544                                 entry->elements[i] = page_address(page);
2545                                 QETH_CARD_STAT_INC(card, rx_sg_alloc_page);
2546                         }
2547                 }
2548         }
2549         list_del_init(&entry->list);
2550         return entry;
2551 }
2552
2553 static int qeth_init_input_buffer(struct qeth_card *card,
2554                 struct qeth_qdio_buffer *buf)
2555 {
2556         struct qeth_buffer_pool_entry *pool_entry;
2557         int i;
2558
2559         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2560                 buf->rx_skb = netdev_alloc_skb(card->dev,
2561                                                QETH_RX_PULL_LEN + ETH_HLEN);
2562                 if (!buf->rx_skb)
2563                         return 1;
2564         }
2565
2566         pool_entry = qeth_find_free_buffer_pool_entry(card);
2567         if (!pool_entry)
2568                 return 1;
2569
2570         /*
2571          * since the buffer is accessed only from the input_tasklet
2572          * there shouldn't be a need to synchronize; also, since we use
2573          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2574          * buffers
2575          */
2576
2577         buf->pool_entry = pool_entry;
2578         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2579                 buf->buffer->element[i].length = PAGE_SIZE;
2580                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2581                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2582                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2583                 else
2584                         buf->buffer->element[i].eflags = 0;
2585                 buf->buffer->element[i].sflags = 0;
2586         }
2587         return 0;
2588 }
2589
2590 int qeth_init_qdio_queues(struct qeth_card *card)
2591 {
2592         unsigned int i;
2593         int rc;
2594
2595         QETH_CARD_TEXT(card, 2, "initqdqs");
2596
2597         /* inbound queue */
2598         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2599         memset(&card->rx, 0, sizeof(struct qeth_rx));
2600         qeth_initialize_working_pool_list(card);
2601         /*give only as many buffers to hardware as we have buffer pool entries*/
2602         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2603                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2604         card->qdio.in_q->next_buf_to_init =
2605                 card->qdio.in_buf_pool.buf_count - 1;
2606         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2607                      card->qdio.in_buf_pool.buf_count - 1);
2608         if (rc) {
2609                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2610                 return rc;
2611         }
2612
2613         /* completion */
2614         rc = qeth_cq_init(card);
2615         if (rc) {
2616                 return rc;
2617         }
2618
2619         /* outbound queue */
2620         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2621                 struct qeth_qdio_out_q *queue = card->qdio.out_qs[i];
2622
2623                 qdio_reset_buffers(queue->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2624                 queue->max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
2625                 queue->next_buf_to_fill = 0;
2626                 queue->do_pack = 0;
2627                 atomic_set(&queue->used_buffers, 0);
2628                 atomic_set(&queue->set_pci_flags_count, 0);
2629                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
2630         }
2631         return 0;
2632 }
2633 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2634
2635 static void qeth_ipa_finalize_cmd(struct qeth_card *card,
2636                                   struct qeth_cmd_buffer *iob)
2637 {
2638         qeth_mpc_finalize_cmd(card, iob);
2639
2640         /* override with IPA-specific values: */
2641         __ipa_cmd(iob)->hdr.seqno = card->seqno.ipa;
2642         iob->reply->seqno = card->seqno.ipa++;
2643 }
2644
2645 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2646                           u16 cmd_length)
2647 {
2648         u8 prot_type = qeth_mpc_select_prot_type(card);
2649         u16 total_length = iob->length;
2650
2651         qeth_setup_ccw(__ccw_from_cmd(iob), CCW_CMD_WRITE, 0, total_length,
2652                        iob->data);
2653         iob->finalize = qeth_ipa_finalize_cmd;
2654
2655         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2656         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &total_length, 2);
2657         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2658         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &cmd_length, 2);
2659         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &cmd_length, 2);
2660         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2661                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2662         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &cmd_length, 2);
2663 }
2664 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2665
2666 struct qeth_cmd_buffer *qeth_ipa_alloc_cmd(struct qeth_card *card,
2667                                            enum qeth_ipa_cmds cmd_code,
2668                                            enum qeth_prot_versions prot,
2669                                            unsigned int data_length)
2670 {
2671         enum qeth_link_types link_type = card->info.link_type;
2672         struct qeth_cmd_buffer *iob;
2673         struct qeth_ipacmd_hdr *hdr;
2674
2675         data_length += offsetof(struct qeth_ipa_cmd, data);
2676         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_length, 1,
2677                              QETH_IPA_TIMEOUT);
2678         if (!iob)
2679                 return NULL;
2680
2681         qeth_prepare_ipa_cmd(card, iob, data_length);
2682
2683         hdr = &__ipa_cmd(iob)->hdr;
2684         hdr->command = cmd_code;
2685         hdr->initiator = IPA_CMD_INITIATOR_HOST;
2686         /* hdr->seqno is set by qeth_send_control_data() */
2687         hdr->adapter_type = (link_type == QETH_LINK_TYPE_HSTR) ? 2 : 1;
2688         hdr->rel_adapter_no = (u8) card->dev->dev_port;
2689         hdr->prim_version_no = IS_LAYER2(card) ? 2 : 1;
2690         hdr->param_count = 1;
2691         hdr->prot_version = prot;
2692         return iob;
2693 }
2694 EXPORT_SYMBOL_GPL(qeth_ipa_alloc_cmd);
2695
2696 static int qeth_send_ipa_cmd_cb(struct qeth_card *card,
2697                                 struct qeth_reply *reply, unsigned long data)
2698 {
2699         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2700
2701         return (cmd->hdr.return_code) ? -EIO : 0;
2702 }
2703
2704 /**
2705  * qeth_send_ipa_cmd() - send an IPA command
2706  *
2707  * See qeth_send_control_data() for explanation of the arguments.
2708  */
2709
2710 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2711                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2712                         unsigned long),
2713                 void *reply_param)
2714 {
2715         int rc;
2716
2717         QETH_CARD_TEXT(card, 4, "sendipa");
2718
2719         if (card->read_or_write_problem) {
2720                 qeth_put_cmd(iob);
2721                 return -EIO;
2722         }
2723
2724         if (reply_cb == NULL)
2725                 reply_cb = qeth_send_ipa_cmd_cb;
2726         rc = qeth_send_control_data(card, iob, reply_cb, reply_param);
2727         if (rc == -ETIME) {
2728                 qeth_clear_ipacmd_list(card);
2729                 qeth_schedule_recovery(card);
2730         }
2731         return rc;
2732 }
2733 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2734
2735 static int qeth_send_startlan_cb(struct qeth_card *card,
2736                                  struct qeth_reply *reply, unsigned long data)
2737 {
2738         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2739
2740         if (cmd->hdr.return_code == IPA_RC_LAN_OFFLINE)
2741                 return -ENETDOWN;
2742
2743         return (cmd->hdr.return_code) ? -EIO : 0;
2744 }
2745
2746 static int qeth_send_startlan(struct qeth_card *card)
2747 {
2748         struct qeth_cmd_buffer *iob;
2749
2750         QETH_CARD_TEXT(card, 2, "strtlan");
2751
2752         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_STARTLAN, QETH_PROT_NONE, 0);
2753         if (!iob)
2754                 return -ENOMEM;
2755         return qeth_send_ipa_cmd(card, iob, qeth_send_startlan_cb, NULL);
2756 }
2757
2758 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2759 {
2760         if (!cmd->hdr.return_code)
2761                 cmd->hdr.return_code =
2762                         cmd->data.setadapterparms.hdr.return_code;
2763         return cmd->hdr.return_code;
2764 }
2765
2766 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2767                 struct qeth_reply *reply, unsigned long data)
2768 {
2769         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2770
2771         QETH_CARD_TEXT(card, 3, "quyadpcb");
2772         if (qeth_setadpparms_inspect_rc(cmd))
2773                 return -EIO;
2774
2775         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2776                 card->info.link_type =
2777                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2778                 QETH_CARD_TEXT_(card, 2, "lnk %d", card->info.link_type);
2779         }
2780         card->options.adp.supported_funcs =
2781                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2782         return 0;
2783 }
2784
2785 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2786                                                     enum qeth_ipa_setadp_cmd adp_cmd,
2787                                                     unsigned int data_length)
2788 {
2789         struct qeth_ipacmd_setadpparms_hdr *hdr;
2790         struct qeth_cmd_buffer *iob;
2791
2792         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETADAPTERPARMS, QETH_PROT_IPV4,
2793                                  data_length +
2794                                  offsetof(struct qeth_ipacmd_setadpparms,
2795                                           data));
2796         if (!iob)
2797                 return NULL;
2798
2799         hdr = &__ipa_cmd(iob)->data.setadapterparms.hdr;
2800         hdr->cmdlength = sizeof(*hdr) + data_length;
2801         hdr->command_code = adp_cmd;
2802         hdr->used_total = 1;
2803         hdr->seq_no = 1;
2804         return iob;
2805 }
2806
2807 static int qeth_query_setadapterparms(struct qeth_card *card)
2808 {
2809         int rc;
2810         struct qeth_cmd_buffer *iob;
2811
2812         QETH_CARD_TEXT(card, 3, "queryadp");
2813         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2814                                    SETADP_DATA_SIZEOF(query_cmds_supp));
2815         if (!iob)
2816                 return -ENOMEM;
2817         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2818         return rc;
2819 }
2820
2821 static int qeth_query_ipassists_cb(struct qeth_card *card,
2822                 struct qeth_reply *reply, unsigned long data)
2823 {
2824         struct qeth_ipa_cmd *cmd;
2825
2826         QETH_CARD_TEXT(card, 2, "qipasscb");
2827
2828         cmd = (struct qeth_ipa_cmd *) data;
2829
2830         switch (cmd->hdr.return_code) {
2831         case IPA_RC_SUCCESS:
2832                 break;
2833         case IPA_RC_NOTSUPP:
2834         case IPA_RC_L2_UNSUPPORTED_CMD:
2835                 QETH_CARD_TEXT(card, 2, "ipaunsup");
2836                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2837                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2838                 return -EOPNOTSUPP;
2839         default:
2840                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2841                                  CARD_DEVID(card), cmd->hdr.return_code);
2842                 return -EIO;
2843         }
2844
2845         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2846                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2847                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2848         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2849                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2850                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2851         } else
2852                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
2853                                  CARD_DEVID(card));
2854         return 0;
2855 }
2856
2857 static int qeth_query_ipassists(struct qeth_card *card,
2858                                 enum qeth_prot_versions prot)
2859 {
2860         int rc;
2861         struct qeth_cmd_buffer *iob;
2862
2863         QETH_CARD_TEXT_(card, 2, "qipassi%i", prot);
2864         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_QIPASSIST, prot, 0);
2865         if (!iob)
2866                 return -ENOMEM;
2867         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
2868         return rc;
2869 }
2870
2871 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
2872                                 struct qeth_reply *reply, unsigned long data)
2873 {
2874         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2875         struct qeth_query_switch_attributes *attrs;
2876         struct qeth_switch_info *sw_info;
2877
2878         QETH_CARD_TEXT(card, 2, "qswiatcb");
2879         if (qeth_setadpparms_inspect_rc(cmd))
2880                 return -EIO;
2881
2882         sw_info = (struct qeth_switch_info *)reply->param;
2883         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
2884         sw_info->capabilities = attrs->capabilities;
2885         sw_info->settings = attrs->settings;
2886         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
2887                         sw_info->settings);
2888         return 0;
2889 }
2890
2891 int qeth_query_switch_attributes(struct qeth_card *card,
2892                                  struct qeth_switch_info *sw_info)
2893 {
2894         struct qeth_cmd_buffer *iob;
2895
2896         QETH_CARD_TEXT(card, 2, "qswiattr");
2897         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
2898                 return -EOPNOTSUPP;
2899         if (!netif_carrier_ok(card->dev))
2900                 return -ENOMEDIUM;
2901         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES, 0);
2902         if (!iob)
2903                 return -ENOMEM;
2904         return qeth_send_ipa_cmd(card, iob,
2905                                 qeth_query_switch_attributes_cb, sw_info);
2906 }
2907
2908 struct qeth_cmd_buffer *qeth_get_diag_cmd(struct qeth_card *card,
2909                                           enum qeth_diags_cmds sub_cmd,
2910                                           unsigned int data_length)
2911 {
2912         struct qeth_ipacmd_diagass *cmd;
2913         struct qeth_cmd_buffer *iob;
2914
2915         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SET_DIAG_ASS, QETH_PROT_NONE,
2916                                  DIAG_HDR_LEN + data_length);
2917         if (!iob)
2918                 return NULL;
2919
2920         cmd = &__ipa_cmd(iob)->data.diagass;
2921         cmd->subcmd_len = DIAG_SUB_HDR_LEN + data_length;
2922         cmd->subcmd = sub_cmd;
2923         return iob;
2924 }
2925 EXPORT_SYMBOL_GPL(qeth_get_diag_cmd);
2926
2927 static int qeth_query_setdiagass_cb(struct qeth_card *card,
2928                 struct qeth_reply *reply, unsigned long data)
2929 {
2930         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2931         u16 rc = cmd->hdr.return_code;
2932
2933         if (rc) {
2934                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
2935                 return -EIO;
2936         }
2937
2938         card->info.diagass_support = cmd->data.diagass.ext;
2939         return 0;
2940 }
2941
2942 static int qeth_query_setdiagass(struct qeth_card *card)
2943 {
2944         struct qeth_cmd_buffer *iob;
2945
2946         QETH_CARD_TEXT(card, 2, "qdiagass");
2947         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_QUERY, 0);
2948         if (!iob)
2949                 return -ENOMEM;
2950         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
2951 }
2952
2953 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
2954 {
2955         unsigned long info = get_zeroed_page(GFP_KERNEL);
2956         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
2957         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
2958         struct ccw_dev_id ccwid;
2959         int level;
2960
2961         tid->chpid = card->info.chpid;
2962         ccw_device_get_id(CARD_RDEV(card), &ccwid);
2963         tid->ssid = ccwid.ssid;
2964         tid->devno = ccwid.devno;
2965         if (!info)
2966                 return;
2967         level = stsi(NULL, 0, 0, 0);
2968         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
2969                 tid->lparnr = info222->lpar_number;
2970         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
2971                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
2972                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
2973         }
2974         free_page(info);
2975         return;
2976 }
2977
2978 static int qeth_hw_trap_cb(struct qeth_card *card,
2979                 struct qeth_reply *reply, unsigned long data)
2980 {
2981         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2982         u16 rc = cmd->hdr.return_code;
2983
2984         if (rc) {
2985                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
2986                 return -EIO;
2987         }
2988         return 0;
2989 }
2990
2991 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
2992 {
2993         struct qeth_cmd_buffer *iob;
2994         struct qeth_ipa_cmd *cmd;
2995
2996         QETH_CARD_TEXT(card, 2, "diagtrap");
2997         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRAP, 64);
2998         if (!iob)
2999                 return -ENOMEM;
3000         cmd = __ipa_cmd(iob);
3001         cmd->data.diagass.type = 1;
3002         cmd->data.diagass.action = action;
3003         switch (action) {
3004         case QETH_DIAGS_TRAP_ARM:
3005                 cmd->data.diagass.options = 0x0003;
3006                 cmd->data.diagass.ext = 0x00010000 +
3007                         sizeof(struct qeth_trap_id);
3008                 qeth_get_trap_id(card,
3009                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3010                 break;
3011         case QETH_DIAGS_TRAP_DISARM:
3012                 cmd->data.diagass.options = 0x0001;
3013                 break;
3014         case QETH_DIAGS_TRAP_CAPTURE:
3015                 break;
3016         }
3017         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3018 }
3019 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3020
3021 static int qeth_check_qdio_errors(struct qeth_card *card,
3022                                   struct qdio_buffer *buf,
3023                                   unsigned int qdio_error,
3024                                   const char *dbftext)
3025 {
3026         if (qdio_error) {
3027                 QETH_CARD_TEXT(card, 2, dbftext);
3028                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3029                                buf->element[15].sflags);
3030                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3031                                buf->element[14].sflags);
3032                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3033                 if ((buf->element[15].sflags) == 0x12) {
3034                         QETH_CARD_STAT_INC(card, rx_dropped);
3035                         return 0;
3036                 } else
3037                         return 1;
3038         }
3039         return 0;
3040 }
3041
3042 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3043 {
3044         struct qeth_qdio_q *queue = card->qdio.in_q;
3045         struct list_head *lh;
3046         int count;
3047         int i;
3048         int rc;
3049         int newcount = 0;
3050
3051         count = (index < queue->next_buf_to_init)?
3052                 card->qdio.in_buf_pool.buf_count -
3053                 (queue->next_buf_to_init - index) :
3054                 card->qdio.in_buf_pool.buf_count -
3055                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3056         /* only requeue at a certain threshold to avoid SIGAs */
3057         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3058                 for (i = queue->next_buf_to_init;
3059                      i < queue->next_buf_to_init + count; ++i) {
3060                         if (qeth_init_input_buffer(card,
3061                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3062                                 break;
3063                         } else {
3064                                 newcount++;
3065                         }
3066                 }
3067
3068                 if (newcount < count) {
3069                         /* we are in memory shortage so we switch back to
3070                            traditional skb allocation and drop packages */
3071                         atomic_set(&card->force_alloc_skb, 3);
3072                         count = newcount;
3073                 } else {
3074                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3075                 }
3076
3077                 if (!count) {
3078                         i = 0;
3079                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3080                                 i++;
3081                         if (i == card->qdio.in_buf_pool.buf_count) {
3082                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3083                                 card->reclaim_index = index;
3084                                 schedule_delayed_work(
3085                                         &card->buffer_reclaim_work,
3086                                         QETH_RECLAIM_WORK_TIME);
3087                         }
3088                         return;
3089                 }
3090
3091                 /*
3092                  * according to old code it should be avoided to requeue all
3093                  * 128 buffers in order to benefit from PCI avoidance.
3094                  * this function keeps at least one buffer (the buffer at
3095                  * 'index') un-requeued -> this buffer is the first buffer that
3096                  * will be requeued the next time
3097                  */
3098                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3099                              queue->next_buf_to_init, count);
3100                 if (rc) {
3101                         QETH_CARD_TEXT(card, 2, "qinberr");
3102                 }
3103                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3104                                           QDIO_MAX_BUFFERS_PER_Q;
3105         }
3106 }
3107
3108 static void qeth_buffer_reclaim_work(struct work_struct *work)
3109 {
3110         struct qeth_card *card = container_of(work, struct qeth_card,
3111                 buffer_reclaim_work.work);
3112
3113         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3114         qeth_queue_input_buffer(card, card->reclaim_index);
3115 }
3116
3117 static void qeth_handle_send_error(struct qeth_card *card,
3118                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3119 {
3120         int sbalf15 = buffer->buffer->element[15].sflags;
3121
3122         QETH_CARD_TEXT(card, 6, "hdsnderr");
3123         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3124
3125         if (!qdio_err)
3126                 return;
3127
3128         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3129                 return;
3130
3131         QETH_CARD_TEXT(card, 1, "lnkfail");
3132         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3133                        (u16)qdio_err, (u8)sbalf15);
3134 }
3135
3136 /**
3137  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3138  * @queue: queue to check for packing buffer
3139  *
3140  * Returns number of buffers that were prepared for flush.
3141  */
3142 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3143 {
3144         struct qeth_qdio_out_buffer *buffer;
3145
3146         buffer = queue->bufs[queue->next_buf_to_fill];
3147         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3148             (buffer->next_element_to_fill > 0)) {
3149                 /* it's a packing buffer */
3150                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3151                 queue->next_buf_to_fill =
3152                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3153                 return 1;
3154         }
3155         return 0;
3156 }
3157
3158 /*
3159  * Switched to packing state if the number of used buffers on a queue
3160  * reaches a certain limit.
3161  */
3162 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3163 {
3164         if (!queue->do_pack) {
3165                 if (atomic_read(&queue->used_buffers)
3166                     >= QETH_HIGH_WATERMARK_PACK){
3167                         /* switch non-PACKING -> PACKING */
3168                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3169                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3170                         queue->do_pack = 1;
3171                 }
3172         }
3173 }
3174
3175 /*
3176  * Switches from packing to non-packing mode. If there is a packing
3177  * buffer on the queue this buffer will be prepared to be flushed.
3178  * In that case 1 is returned to inform the caller. If no buffer
3179  * has to be flushed, zero is returned.
3180  */
3181 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3182 {
3183         if (queue->do_pack) {
3184                 if (atomic_read(&queue->used_buffers)
3185                     <= QETH_LOW_WATERMARK_PACK) {
3186                         /* switch PACKING -> non-PACKING */
3187                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3188                         QETH_TXQ_STAT_INC(queue, packing_mode_switch);
3189                         queue->do_pack = 0;
3190                         return qeth_prep_flush_pack_buffer(queue);
3191                 }
3192         }
3193         return 0;
3194 }
3195
3196 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3197                                int count)
3198 {
3199         struct qeth_qdio_out_buffer *buf;
3200         int rc;
3201         int i;
3202         unsigned int qdio_flags;
3203
3204         for (i = index; i < index + count; ++i) {
3205                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3206                 buf = queue->bufs[bidx];
3207                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3208                                 SBAL_EFLAGS_LAST_ENTRY;
3209
3210                 if (queue->bufstates)
3211                         queue->bufstates[bidx].user = buf;
3212
3213                 if (IS_IQD(queue->card))
3214                         continue;
3215
3216                 if (!queue->do_pack) {
3217                         if ((atomic_read(&queue->used_buffers) >=
3218                                 (QETH_HIGH_WATERMARK_PACK -
3219                                  QETH_WATERMARK_PACK_FUZZ)) &&
3220                             !atomic_read(&queue->set_pci_flags_count)) {
3221                                 /* it's likely that we'll go to packing
3222                                  * mode soon */
3223                                 atomic_inc(&queue->set_pci_flags_count);
3224                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3225                         }
3226                 } else {
3227                         if (!atomic_read(&queue->set_pci_flags_count)) {
3228                                 /*
3229                                  * there's no outstanding PCI any more, so we
3230                                  * have to request a PCI to be sure the the PCI
3231                                  * will wake at some time in the future then we
3232                                  * can flush packed buffers that might still be
3233                                  * hanging around, which can happen if no
3234                                  * further send was requested by the stack
3235                                  */
3236                                 atomic_inc(&queue->set_pci_flags_count);
3237                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3238                         }
3239                 }
3240         }
3241
3242         QETH_TXQ_STAT_ADD(queue, bufs, count);
3243         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3244         if (atomic_read(&queue->set_pci_flags_count))
3245                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3246         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3247                      queue->queue_no, index, count);
3248         if (rc) {
3249                 QETH_TXQ_STAT_ADD(queue, tx_errors, count);
3250                 /* ignore temporary SIGA errors without busy condition */
3251                 if (rc == -ENOBUFS)
3252                         return;
3253                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3254                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3255                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3256                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3257                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3258
3259                 /* this must not happen under normal circumstances. if it
3260                  * happens something is really wrong -> recover */
3261                 qeth_schedule_recovery(queue->card);
3262                 return;
3263         }
3264 }
3265
3266 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3267 {
3268         int index;
3269         int flush_cnt = 0;
3270         int q_was_packing = 0;
3271
3272         /*
3273          * check if weed have to switch to non-packing mode or if
3274          * we have to get a pci flag out on the queue
3275          */
3276         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3277             !atomic_read(&queue->set_pci_flags_count)) {
3278                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3279                                 QETH_OUT_Q_UNLOCKED) {
3280                         /*
3281                          * If we get in here, there was no action in
3282                          * do_send_packet. So, we check if there is a
3283                          * packing buffer to be flushed here.
3284                          */
3285                         index = queue->next_buf_to_fill;
3286                         q_was_packing = queue->do_pack;
3287                         /* queue->do_pack may change */
3288                         barrier();
3289                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3290                         if (!flush_cnt &&
3291                             !atomic_read(&queue->set_pci_flags_count))
3292                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3293                         if (q_was_packing)
3294                                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_cnt);
3295                         if (flush_cnt)
3296                                 qeth_flush_buffers(queue, index, flush_cnt);
3297                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3298                 }
3299         }
3300 }
3301
3302 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3303                                  unsigned long card_ptr)
3304 {
3305         struct qeth_card *card = (struct qeth_card *)card_ptr;
3306
3307         if (card->dev->flags & IFF_UP)
3308                 napi_schedule(&card->napi);
3309 }
3310
3311 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3312 {
3313         int rc;
3314
3315         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3316                 rc = -1;
3317                 goto out;
3318         } else {
3319                 if (card->options.cq == cq) {
3320                         rc = 0;
3321                         goto out;
3322                 }
3323
3324                 if (card->state != CARD_STATE_DOWN) {
3325                         rc = -1;
3326                         goto out;
3327                 }
3328
3329                 qeth_free_qdio_queues(card);
3330                 card->options.cq = cq;
3331                 rc = 0;
3332         }
3333 out:
3334         return rc;
3335
3336 }
3337 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3338
3339 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3340                                  unsigned int queue, int first_element,
3341                                  int count)
3342 {
3343         struct qeth_qdio_q *cq = card->qdio.c_q;
3344         int i;
3345         int rc;
3346
3347         if (!qeth_is_cq(card, queue))
3348                 return;
3349
3350         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3351         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3352         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3353
3354         if (qdio_err) {
3355                 netif_tx_stop_all_queues(card->dev);
3356                 qeth_schedule_recovery(card);
3357                 return;
3358         }
3359
3360         for (i = first_element; i < first_element + count; ++i) {
3361                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3362                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3363                 int e = 0;
3364
3365                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3366                        buffer->element[e].addr) {
3367                         unsigned long phys_aob_addr;
3368
3369                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3370                         qeth_qdio_handle_aob(card, phys_aob_addr);
3371                         ++e;
3372                 }
3373                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3374         }
3375         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3376                     card->qdio.c_q->next_buf_to_init,
3377                     count);
3378         if (rc) {
3379                 dev_warn(&card->gdev->dev,
3380                         "QDIO reported an error, rc=%i\n", rc);
3381                 QETH_CARD_TEXT(card, 2, "qcqherr");
3382         }
3383         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3384                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3385 }
3386
3387 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3388                                     unsigned int qdio_err, int queue,
3389                                     int first_elem, int count,
3390                                     unsigned long card_ptr)
3391 {
3392         struct qeth_card *card = (struct qeth_card *)card_ptr;
3393
3394         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3395         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3396
3397         if (qeth_is_cq(card, queue))
3398                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3399         else if (qdio_err)
3400                 qeth_schedule_recovery(card);
3401 }
3402
3403 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3404                                      unsigned int qdio_error, int __queue,
3405                                      int first_element, int count,
3406                                      unsigned long card_ptr)
3407 {
3408         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3409         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3410         struct qeth_qdio_out_buffer *buffer;
3411         struct net_device *dev = card->dev;
3412         struct netdev_queue *txq;
3413         int i;
3414
3415         QETH_CARD_TEXT(card, 6, "qdouhdl");
3416         if (qdio_error & QDIO_ERROR_FATAL) {
3417                 QETH_CARD_TEXT(card, 2, "achkcond");
3418                 netif_tx_stop_all_queues(dev);
3419                 qeth_schedule_recovery(card);
3420                 return;
3421         }
3422
3423         for (i = first_element; i < (first_element + count); ++i) {
3424                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3425                 buffer = queue->bufs[bidx];
3426                 qeth_handle_send_error(card, buffer, qdio_error);
3427
3428                 if (queue->bufstates &&
3429                     (queue->bufstates[bidx].flags &
3430                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3431                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3432
3433                         if (atomic_cmpxchg(&buffer->state,
3434                                            QETH_QDIO_BUF_PRIMED,
3435                                            QETH_QDIO_BUF_PENDING) ==
3436                                 QETH_QDIO_BUF_PRIMED) {
3437                                 qeth_notify_skbs(queue, buffer,
3438                                                  TX_NOTIFY_PENDING);
3439                         }
3440                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3441
3442                         /* prepare the queue slot for re-use: */
3443                         qeth_scrub_qdio_buffer(buffer->buffer,
3444                                                queue->max_elements);
3445                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3446                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3447                                 qeth_schedule_recovery(card);
3448                         }
3449                 } else {
3450                         if (card->options.cq == QETH_CQ_ENABLED) {
3451                                 enum iucv_tx_notify n;
3452
3453                                 n = qeth_compute_cq_notification(
3454                                         buffer->buffer->element[15].sflags, 0);
3455                                 qeth_notify_skbs(queue, buffer, n);
3456                         }
3457
3458                         qeth_clear_output_buffer(queue, buffer);
3459                 }
3460                 qeth_cleanup_handled_pending(queue, bidx, 0);
3461         }
3462         atomic_sub(count, &queue->used_buffers);
3463         /* check if we need to do something on this outbound queue */
3464         if (!IS_IQD(card))
3465                 qeth_check_outbound_queue(queue);
3466
3467         if (IS_IQD(card))
3468                 __queue = qeth_iqd_translate_txq(dev, __queue);
3469         txq = netdev_get_tx_queue(dev, __queue);
3470         /* xmit may have observed the full-condition, but not yet stopped the
3471          * txq. In which case the code below won't trigger. So before returning,
3472          * xmit will re-check the txq's fill level and wake it up if needed.
3473          */
3474         if (netif_tx_queue_stopped(txq) && !qeth_out_queue_is_full(queue))
3475                 netif_tx_wake_queue(txq);
3476 }
3477
3478 /**
3479  * Note: Function assumes that we have 4 outbound queues.
3480  */
3481 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb)
3482 {
3483         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
3484         u8 tos;
3485
3486         switch (card->qdio.do_prio_queueing) {
3487         case QETH_PRIO_Q_ING_TOS:
3488         case QETH_PRIO_Q_ING_PREC:
3489                 switch (qeth_get_ip_version(skb)) {
3490                 case 4:
3491                         tos = ipv4_get_dsfield(ip_hdr(skb));
3492                         break;
3493                 case 6:
3494                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3495                         break;
3496                 default:
3497                         return card->qdio.default_out_queue;
3498                 }
3499                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3500                         return ~tos >> 6 & 3;
3501                 if (tos & IPTOS_MINCOST)
3502                         return 3;
3503                 if (tos & IPTOS_RELIABILITY)
3504                         return 2;
3505                 if (tos & IPTOS_THROUGHPUT)
3506                         return 1;
3507                 if (tos & IPTOS_LOWDELAY)
3508                         return 0;
3509                 break;
3510         case QETH_PRIO_Q_ING_SKB:
3511                 if (skb->priority > 5)
3512                         return 0;
3513                 return ~skb->priority >> 1 & 3;
3514         case QETH_PRIO_Q_ING_VLAN:
3515                 if (veth->h_vlan_proto == htons(ETH_P_8021Q))
3516                         return ~ntohs(veth->h_vlan_TCI) >>
3517                                (VLAN_PRIO_SHIFT + 1) & 3;
3518                 break;
3519         default:
3520                 break;
3521         }
3522         return card->qdio.default_out_queue;
3523 }
3524 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3525
3526 /**
3527  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3528  * @skb:                                SKB address
3529  *
3530  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3531  * fragmented part of the SKB. Returns zero for linear SKB.
3532  */
3533 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3534 {
3535         int cnt, elements = 0;
3536
3537         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3538                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3539
3540                 elements += qeth_get_elements_for_range(
3541                         (addr_t)skb_frag_address(frag),
3542                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3543         }
3544         return elements;
3545 }
3546
3547 /**
3548  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3549  *                              to transmit an skb.
3550  * @skb:                        the skb to operate on.
3551  * @data_offset:                skip this part of the skb's linear data
3552  *
3553  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3554  * skb's data (both its linear part and paged fragments).
3555  */
3556 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3557 {
3558         unsigned int elements = qeth_get_elements_for_frags(skb);
3559         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3560         addr_t start = (addr_t)skb->data + data_offset;
3561
3562         if (start != end)
3563                 elements += qeth_get_elements_for_range(start, end);
3564         return elements;
3565 }
3566 EXPORT_SYMBOL_GPL(qeth_count_elements);
3567
3568 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3569                                          MAX_TCP_HEADER)
3570
3571 /**
3572  * qeth_add_hw_header() - add a HW header to an skb.
3573  * @skb: skb that the HW header should be added to.
3574  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3575  *       it contains a valid pointer to a qeth_hdr.
3576  * @hdr_len: length of the HW header.
3577  * @proto_len: length of protocol headers that need to be in same page as the
3578  *             HW header.
3579  *
3580  * Returns the pushed length. If the header can't be pushed on
3581  * (eg. because it would cross a page boundary), it is allocated from
3582  * the cache instead and 0 is returned.
3583  * The number of needed buffer elements is returned in @elements.
3584  * Error to create the hdr is indicated by returning with < 0.
3585  */
3586 static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
3587                               struct sk_buff *skb, struct qeth_hdr **hdr,
3588                               unsigned int hdr_len, unsigned int proto_len,
3589                               unsigned int *elements)
3590 {
3591         const unsigned int contiguous = proto_len ? proto_len : 1;
3592         const unsigned int max_elements = queue->max_elements;
3593         unsigned int __elements;
3594         addr_t start, end;
3595         bool push_ok;
3596         int rc;
3597
3598 check_layout:
3599         start = (addr_t)skb->data - hdr_len;
3600         end = (addr_t)skb->data;
3601
3602         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3603                 /* Push HW header into same page as first protocol header. */
3604                 push_ok = true;
3605                 /* ... but TSO always needs a separate element for headers: */
3606                 if (skb_is_gso(skb))
3607                         __elements = 1 + qeth_count_elements(skb, proto_len);
3608                 else
3609                         __elements = qeth_count_elements(skb, 0);
3610         } else if (!proto_len && PAGE_ALIGNED(skb->data)) {
3611                 /* Push HW header into preceding page, flush with skb->data. */
3612                 push_ok = true;
3613                 __elements = 1 + qeth_count_elements(skb, 0);
3614         } else {
3615                 /* Use header cache, copy protocol headers up. */
3616                 push_ok = false;
3617                 __elements = 1 + qeth_count_elements(skb, proto_len);
3618         }
3619
3620         /* Compress skb to fit into one IO buffer: */
3621         if (__elements > max_elements) {
3622                 if (!skb_is_nonlinear(skb)) {
3623                         /* Drop it, no easy way of shrinking it further. */
3624                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3625                                          max_elements, __elements, skb->len);
3626                         return -E2BIG;
3627                 }
3628
3629                 rc = skb_linearize(skb);
3630                 if (rc) {
3631                         QETH_TXQ_STAT_INC(queue, skbs_linearized_fail);
3632                         return rc;
3633                 }
3634
3635                 QETH_TXQ_STAT_INC(queue, skbs_linearized);
3636                 /* Linearization changed the layout, re-evaluate: */
3637                 goto check_layout;
3638         }
3639
3640         *elements = __elements;
3641         /* Add the header: */
3642         if (push_ok) {
3643                 *hdr = skb_push(skb, hdr_len);
3644                 return hdr_len;
3645         }
3646         /* fall back */
3647         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3648                 return -E2BIG;
3649         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3650         if (!*hdr)
3651                 return -ENOMEM;
3652         /* Copy protocol headers behind HW header: */
3653         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3654         return 0;
3655 }
3656
3657 static void __qeth_fill_buffer(struct sk_buff *skb,
3658                                struct qeth_qdio_out_buffer *buf,
3659                                bool is_first_elem, unsigned int offset)
3660 {
3661         struct qdio_buffer *buffer = buf->buffer;
3662         int element = buf->next_element_to_fill;
3663         int length = skb_headlen(skb) - offset;
3664         char *data = skb->data + offset;
3665         unsigned int elem_length, cnt;
3666
3667         /* map linear part into buffer element(s) */
3668         while (length > 0) {
3669                 elem_length = min_t(unsigned int, length,
3670                                     PAGE_SIZE - offset_in_page(data));
3671
3672                 buffer->element[element].addr = data;
3673                 buffer->element[element].length = elem_length;
3674                 length -= elem_length;
3675                 if (is_first_elem) {
3676                         is_first_elem = false;
3677                         if (length || skb_is_nonlinear(skb))
3678                                 /* skb needs additional elements */
3679                                 buffer->element[element].eflags =
3680                                         SBAL_EFLAGS_FIRST_FRAG;
3681                         else
3682                                 buffer->element[element].eflags = 0;
3683                 } else {
3684                         buffer->element[element].eflags =
3685                                 SBAL_EFLAGS_MIDDLE_FRAG;
3686                 }
3687
3688                 data += elem_length;
3689                 element++;
3690         }
3691
3692         /* map page frags into buffer element(s) */
3693         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3694                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3695
3696                 data = skb_frag_address(frag);
3697                 length = skb_frag_size(frag);
3698                 while (length > 0) {
3699                         elem_length = min_t(unsigned int, length,
3700                                             PAGE_SIZE - offset_in_page(data));
3701
3702                         buffer->element[element].addr = data;
3703                         buffer->element[element].length = elem_length;
3704                         buffer->element[element].eflags =
3705                                 SBAL_EFLAGS_MIDDLE_FRAG;
3706
3707                         length -= elem_length;
3708                         data += elem_length;
3709                         element++;
3710                 }
3711         }
3712
3713         if (buffer->element[element - 1].eflags)
3714                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3715         buf->next_element_to_fill = element;
3716 }
3717
3718 /**
3719  * qeth_fill_buffer() - map skb into an output buffer
3720  * @queue:      QDIO queue to submit the buffer on
3721  * @buf:        buffer to transport the skb
3722  * @skb:        skb to map into the buffer
3723  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3724  *              from qeth_core_header_cache.
3725  * @offset:     when mapping the skb, start at skb->data + offset
3726  * @hd_len:     if > 0, build a dedicated header element of this size
3727  * flush:       Prepare the buffer to be flushed, regardless of its fill level.
3728  */
3729 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3730                             struct qeth_qdio_out_buffer *buf,
3731                             struct sk_buff *skb, struct qeth_hdr *hdr,
3732                             unsigned int offset, unsigned int hd_len,
3733                             bool flush)
3734 {
3735         struct qdio_buffer *buffer = buf->buffer;
3736         bool is_first_elem = true;
3737
3738         __skb_queue_tail(&buf->skb_list, skb);
3739
3740         /* build dedicated header element */
3741         if (hd_len) {
3742                 int element = buf->next_element_to_fill;
3743                 is_first_elem = false;
3744
3745                 buffer->element[element].addr = hdr;
3746                 buffer->element[element].length = hd_len;
3747                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3748                 /* remember to free cache-allocated qeth_hdr: */
3749                 buf->is_header[element] = ((void *)hdr != skb->data);
3750                 buf->next_element_to_fill++;
3751         }
3752
3753         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3754
3755         if (!queue->do_pack) {
3756                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
3757         } else {
3758                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
3759
3760                 QETH_TXQ_STAT_INC(queue, skbs_pack);
3761                 /* If the buffer still has free elements, keep using it. */
3762                 if (!flush &&
3763                     buf->next_element_to_fill < queue->max_elements)
3764                         return 0;
3765         }
3766
3767         /* flush out the buffer */
3768         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3769         queue->next_buf_to_fill = (queue->next_buf_to_fill + 1) %
3770                                   QDIO_MAX_BUFFERS_PER_Q;
3771         return 1;
3772 }
3773
3774 static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
3775                                     struct sk_buff *skb, struct qeth_hdr *hdr,
3776                                     unsigned int offset, unsigned int hd_len)
3777 {
3778         int index = queue->next_buf_to_fill;
3779         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
3780         struct netdev_queue *txq;
3781         bool stopped = false;
3782
3783         /* Just a sanity check, the wake/stop logic should ensure that we always
3784          * get a free buffer.
3785          */
3786         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3787                 return -EBUSY;
3788
3789         txq = netdev_get_tx_queue(queue->card->dev, skb_get_queue_mapping(skb));
3790
3791         if (atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3792                 /* If a TX completion happens right _here_ and misses to wake
3793                  * the txq, then our re-check below will catch the race.
3794                  */
3795                 QETH_TXQ_STAT_INC(queue, stopped);
3796                 netif_tx_stop_queue(txq);
3797                 stopped = true;
3798         }
3799
3800         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len, stopped);
3801         qeth_flush_buffers(queue, index, 1);
3802
3803         if (stopped && !qeth_out_queue_is_full(queue))
3804                 netif_tx_start_queue(txq);
3805         return 0;
3806 }
3807
3808 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3809                         struct sk_buff *skb, struct qeth_hdr *hdr,
3810                         unsigned int offset, unsigned int hd_len,
3811                         int elements_needed)
3812 {
3813         struct qeth_qdio_out_buffer *buffer;
3814         struct netdev_queue *txq;
3815         bool stopped = false;
3816         int start_index;
3817         int flush_count = 0;
3818         int do_pack = 0;
3819         int tmp;
3820         int rc = 0;
3821
3822         /* spin until we get the queue ... */
3823         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
3824                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
3825         start_index = queue->next_buf_to_fill;
3826         buffer = queue->bufs[queue->next_buf_to_fill];
3827
3828         /* Just a sanity check, the wake/stop logic should ensure that we always
3829          * get a free buffer.
3830          */
3831         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
3832                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3833                 return -EBUSY;
3834         }
3835
3836         txq = netdev_get_tx_queue(card->dev, skb_get_queue_mapping(skb));
3837
3838         /* check if we need to switch packing state of this queue */
3839         qeth_switch_to_packing_if_needed(queue);
3840         if (queue->do_pack) {
3841                 do_pack = 1;
3842                 /* does packet fit in current buffer? */
3843                 if (buffer->next_element_to_fill + elements_needed >
3844                     queue->max_elements) {
3845                         /* ... no -> set state PRIMED */
3846                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3847                         flush_count++;
3848                         queue->next_buf_to_fill =
3849                                 (queue->next_buf_to_fill + 1) %
3850                                 QDIO_MAX_BUFFERS_PER_Q;
3851                         buffer = queue->bufs[queue->next_buf_to_fill];
3852
3853                         /* We stepped forward, so sanity-check again: */
3854                         if (atomic_read(&buffer->state) !=
3855                             QETH_QDIO_BUF_EMPTY) {
3856                                 qeth_flush_buffers(queue, start_index,
3857                                                            flush_count);
3858                                 atomic_set(&queue->state,
3859                                                 QETH_OUT_Q_UNLOCKED);
3860                                 rc = -EBUSY;
3861                                 goto out;
3862                         }
3863                 }
3864         }
3865
3866         if (buffer->next_element_to_fill == 0 &&
3867             atomic_inc_return(&queue->used_buffers) >= QDIO_MAX_BUFFERS_PER_Q) {
3868                 /* If a TX completion happens right _here_ and misses to wake
3869                  * the txq, then our re-check below will catch the race.
3870                  */
3871                 QETH_TXQ_STAT_INC(queue, stopped);
3872                 netif_tx_stop_queue(txq);
3873                 stopped = true;
3874         }
3875
3876         flush_count += qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len,
3877                                         stopped);
3878         if (flush_count)
3879                 qeth_flush_buffers(queue, start_index, flush_count);
3880         else if (!atomic_read(&queue->set_pci_flags_count))
3881                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
3882         /*
3883          * queue->state will go from LOCKED -> UNLOCKED or from
3884          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
3885          * (switch packing state or flush buffer to get another pci flag out).
3886          * In that case we will enter this loop
3887          */
3888         while (atomic_dec_return(&queue->state)) {
3889                 start_index = queue->next_buf_to_fill;
3890                 /* check if we can go back to non-packing state */
3891                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
3892                 /*
3893                  * check if we need to flush a packing buffer to get a pci
3894                  * flag out on the queue
3895                  */
3896                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
3897                         tmp = qeth_prep_flush_pack_buffer(queue);
3898                 if (tmp) {
3899                         qeth_flush_buffers(queue, start_index, tmp);
3900                         flush_count += tmp;
3901                 }
3902         }
3903 out:
3904         /* at this point the queue is UNLOCKED again */
3905         if (do_pack)
3906                 QETH_TXQ_STAT_ADD(queue, bufs_pack, flush_count);
3907
3908         if (stopped && !qeth_out_queue_is_full(queue))
3909                 netif_tx_start_queue(txq);
3910         return rc;
3911 }
3912 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
3913
3914 static void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr,
3915                               unsigned int payload_len, struct sk_buff *skb,
3916                               unsigned int proto_len)
3917 {
3918         struct qeth_hdr_ext_tso *ext = &hdr->ext;
3919
3920         ext->hdr_tot_len = sizeof(*ext);
3921         ext->imb_hdr_no = 1;
3922         ext->hdr_type = 1;
3923         ext->hdr_version = 1;
3924         ext->hdr_len = 28;
3925         ext->payload_len = payload_len;
3926         ext->mss = skb_shinfo(skb)->gso_size;
3927         ext->dg_hdr_len = proto_len;
3928 }
3929
3930 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
3931               struct qeth_qdio_out_q *queue, int ipv,
3932               void (*fill_header)(struct qeth_qdio_out_q *queue,
3933                                   struct qeth_hdr *hdr, struct sk_buff *skb,
3934                                   int ipv, unsigned int data_len))
3935 {
3936         unsigned int proto_len, hw_hdr_len;
3937         unsigned int frame_len = skb->len;
3938         bool is_tso = skb_is_gso(skb);
3939         unsigned int data_offset = 0;
3940         struct qeth_hdr *hdr = NULL;
3941         unsigned int hd_len = 0;
3942         unsigned int elements;
3943         int push_len, rc;
3944         bool is_sg;
3945
3946         if (is_tso) {
3947                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
3948                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3949         } else {
3950                 hw_hdr_len = sizeof(struct qeth_hdr);
3951                 proto_len = (IS_IQD(card) && IS_LAYER2(card)) ? ETH_HLEN : 0;
3952         }
3953
3954         rc = skb_cow_head(skb, hw_hdr_len);
3955         if (rc)
3956                 return rc;
3957
3958         push_len = qeth_add_hw_header(queue, skb, &hdr, hw_hdr_len, proto_len,
3959                                       &elements);
3960         if (push_len < 0)
3961                 return push_len;
3962         if (is_tso || !push_len) {
3963                 /* HW header needs its own buffer element. */
3964                 hd_len = hw_hdr_len + proto_len;
3965                 data_offset = push_len + proto_len;
3966         }
3967         memset(hdr, 0, hw_hdr_len);
3968         fill_header(queue, hdr, skb, ipv, frame_len);
3969         if (is_tso)
3970                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
3971                                   frame_len - proto_len, skb, proto_len);
3972
3973         is_sg = skb_is_nonlinear(skb);
3974         if (IS_IQD(card)) {
3975                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
3976                                               hd_len);
3977         } else {
3978                 /* TODO: drop skb_orphan() once TX completion is fast enough */
3979                 skb_orphan(skb);
3980                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
3981                                          hd_len, elements);
3982         }
3983
3984         if (!rc) {
3985                 QETH_TXQ_STAT_ADD(queue, buf_elements, elements);
3986                 if (is_sg)
3987                         QETH_TXQ_STAT_INC(queue, skbs_sg);
3988                 if (is_tso) {
3989                         QETH_TXQ_STAT_INC(queue, skbs_tso);
3990                         QETH_TXQ_STAT_ADD(queue, tso_bytes, frame_len);
3991                 }
3992         } else {
3993                 if (!push_len)
3994                         kmem_cache_free(qeth_core_header_cache, hdr);
3995         }
3996         return rc;
3997 }
3998 EXPORT_SYMBOL_GPL(qeth_xmit);
3999
4000 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4001                 struct qeth_reply *reply, unsigned long data)
4002 {
4003         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4004         struct qeth_ipacmd_setadpparms *setparms;
4005
4006         QETH_CARD_TEXT(card, 4, "prmadpcb");
4007
4008         setparms = &(cmd->data.setadapterparms);
4009         if (qeth_setadpparms_inspect_rc(cmd)) {
4010                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4011                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4012         }
4013         card->info.promisc_mode = setparms->data.mode;
4014         return (cmd->hdr.return_code) ? -EIO : 0;
4015 }
4016
4017 void qeth_setadp_promisc_mode(struct qeth_card *card)
4018 {
4019         enum qeth_ipa_promisc_modes mode;
4020         struct net_device *dev = card->dev;
4021         struct qeth_cmd_buffer *iob;
4022         struct qeth_ipa_cmd *cmd;
4023
4024         QETH_CARD_TEXT(card, 4, "setprom");
4025
4026         if (((dev->flags & IFF_PROMISC) &&
4027              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4028             (!(dev->flags & IFF_PROMISC) &&
4029              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4030                 return;
4031         mode = SET_PROMISC_MODE_OFF;
4032         if (dev->flags & IFF_PROMISC)
4033                 mode = SET_PROMISC_MODE_ON;
4034         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4035
4036         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4037                                    SETADP_DATA_SIZEOF(mode));
4038         if (!iob)
4039                 return;
4040         cmd = __ipa_cmd(iob);
4041         cmd->data.setadapterparms.data.mode = mode;
4042         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4043 }
4044 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4045
4046 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4047                 struct qeth_reply *reply, unsigned long data)
4048 {
4049         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4050         struct qeth_ipacmd_setadpparms *adp_cmd;
4051
4052         QETH_CARD_TEXT(card, 4, "chgmaccb");
4053         if (qeth_setadpparms_inspect_rc(cmd))
4054                 return -EIO;
4055
4056         adp_cmd = &cmd->data.setadapterparms;
4057         if (!is_valid_ether_addr(adp_cmd->data.change_addr.addr))
4058                 return -EADDRNOTAVAIL;
4059
4060         if (IS_LAYER2(card) && IS_OSD(card) && !IS_VM_NIC(card) &&
4061             !(adp_cmd->hdr.flags & QETH_SETADP_FLAGS_VIRTUAL_MAC))
4062                 return -EADDRNOTAVAIL;
4063
4064         ether_addr_copy(card->dev->dev_addr, adp_cmd->data.change_addr.addr);
4065         return 0;
4066 }
4067
4068 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4069 {
4070         int rc;
4071         struct qeth_cmd_buffer *iob;
4072         struct qeth_ipa_cmd *cmd;
4073
4074         QETH_CARD_TEXT(card, 4, "chgmac");
4075
4076         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4077                                    SETADP_DATA_SIZEOF(change_addr));
4078         if (!iob)
4079                 return -ENOMEM;
4080         cmd = __ipa_cmd(iob);
4081         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4082         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4083         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4084                         card->dev->dev_addr);
4085         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4086                                NULL);
4087         return rc;
4088 }
4089 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4090
4091 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4092                 struct qeth_reply *reply, unsigned long data)
4093 {
4094         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4095         struct qeth_set_access_ctrl *access_ctrl_req;
4096         int fallback = *(int *)reply->param;
4097
4098         QETH_CARD_TEXT(card, 4, "setaccb");
4099         if (cmd->hdr.return_code)
4100                 return -EIO;
4101         qeth_setadpparms_inspect_rc(cmd);
4102
4103         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4104         QETH_CARD_TEXT_(card, 2, "rc=%d",
4105                         cmd->data.setadapterparms.hdr.return_code);
4106         if (cmd->data.setadapterparms.hdr.return_code !=
4107                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4108                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4109                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4110                                  cmd->data.setadapterparms.hdr.return_code);
4111         switch (cmd->data.setadapterparms.hdr.return_code) {
4112         case SET_ACCESS_CTRL_RC_SUCCESS:
4113                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4114                         dev_info(&card->gdev->dev,
4115                             "QDIO data connection isolation is deactivated\n");
4116                 } else {
4117                         dev_info(&card->gdev->dev,
4118                             "QDIO data connection isolation is activated\n");
4119                 }
4120                 break;
4121         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4122                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4123                                  CARD_DEVID(card));
4124                 if (fallback)
4125                         card->options.isolation = card->options.prev_isolation;
4126                 break;
4127         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4128                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4129                                  CARD_DEVID(card));
4130                 if (fallback)
4131                         card->options.isolation = card->options.prev_isolation;
4132                 break;
4133         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4134                 dev_err(&card->gdev->dev, "Adapter does not "
4135                         "support QDIO data connection isolation\n");
4136                 break;
4137         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4138                 dev_err(&card->gdev->dev,
4139                         "Adapter is dedicated. "
4140                         "QDIO data connection isolation not supported\n");
4141                 if (fallback)
4142                         card->options.isolation = card->options.prev_isolation;
4143                 break;
4144         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4145                 dev_err(&card->gdev->dev,
4146                         "TSO does not permit QDIO data connection isolation\n");
4147                 if (fallback)
4148                         card->options.isolation = card->options.prev_isolation;
4149                 break;
4150         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4151                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4152                         "support reflective relay mode\n");
4153                 if (fallback)
4154                         card->options.isolation = card->options.prev_isolation;
4155                 break;
4156         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4157                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4158                                         "enabled at the adjacent switch port");
4159                 if (fallback)
4160                         card->options.isolation = card->options.prev_isolation;
4161                 break;
4162         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4163                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4164                                         "at the adjacent switch failed\n");
4165                 break;
4166         default:
4167                 /* this should never happen */
4168                 if (fallback)
4169                         card->options.isolation = card->options.prev_isolation;
4170                 break;
4171         }
4172         return (cmd->hdr.return_code) ? -EIO : 0;
4173 }
4174
4175 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4176                 enum qeth_ipa_isolation_modes isolation, int fallback)
4177 {
4178         int rc;
4179         struct qeth_cmd_buffer *iob;
4180         struct qeth_ipa_cmd *cmd;
4181         struct qeth_set_access_ctrl *access_ctrl_req;
4182
4183         QETH_CARD_TEXT(card, 4, "setacctl");
4184
4185         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4186                                    SETADP_DATA_SIZEOF(set_access_ctrl));
4187         if (!iob)
4188                 return -ENOMEM;
4189         cmd = __ipa_cmd(iob);
4190         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4191         access_ctrl_req->subcmd_code = isolation;
4192
4193         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4194                                &fallback);
4195         QETH_CARD_TEXT_(card, 2, "rc=%d", rc);
4196         return rc;
4197 }
4198
4199 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4200 {
4201         int rc = 0;
4202
4203         QETH_CARD_TEXT(card, 4, "setactlo");
4204
4205         if ((IS_OSD(card) || IS_OSX(card)) &&
4206             qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4207                 rc = qeth_setadpparms_set_access_ctrl(card,
4208                         card->options.isolation, fallback);
4209                 if (rc) {
4210                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4211                                          rc, CARD_DEVID(card));
4212                         rc = -EOPNOTSUPP;
4213                 }
4214         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4215                 card->options.isolation = ISOLATION_MODE_NONE;
4216
4217                 dev_err(&card->gdev->dev, "Adapter does not "
4218                         "support QDIO data connection isolation\n");
4219                 rc = -EOPNOTSUPP;
4220         }
4221         return rc;
4222 }
4223 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4224
4225 void qeth_tx_timeout(struct net_device *dev)
4226 {
4227         struct qeth_card *card;
4228
4229         card = dev->ml_priv;
4230         QETH_CARD_TEXT(card, 4, "txtimeo");
4231         qeth_schedule_recovery(card);
4232 }
4233 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4234
4235 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4236 {
4237         struct qeth_card *card = dev->ml_priv;
4238         int rc = 0;
4239
4240         switch (regnum) {
4241         case MII_BMCR: /* Basic mode control register */
4242                 rc = BMCR_FULLDPLX;
4243                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4244                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4245                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH) &&
4246                     (card->info.link_type != QETH_LINK_TYPE_25GBIT_ETH))
4247                         rc |= BMCR_SPEED100;
4248                 break;
4249         case MII_BMSR: /* Basic mode status register */
4250                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4251                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4252                      BMSR_100BASE4;
4253                 break;
4254         case MII_PHYSID1: /* PHYS ID 1 */
4255                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4256                      dev->dev_addr[2];
4257                 rc = (rc >> 5) & 0xFFFF;
4258                 break;
4259         case MII_PHYSID2: /* PHYS ID 2 */
4260                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4261                 break;
4262         case MII_ADVERTISE: /* Advertisement control reg */
4263                 rc = ADVERTISE_ALL;
4264                 break;
4265         case MII_LPA: /* Link partner ability reg */
4266                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4267                      LPA_100BASE4 | LPA_LPACK;
4268                 break;
4269         case MII_EXPANSION: /* Expansion register */
4270                 break;
4271         case MII_DCOUNTER: /* disconnect counter */
4272                 break;
4273         case MII_FCSCOUNTER: /* false carrier counter */
4274                 break;
4275         case MII_NWAYTEST: /* N-way auto-neg test register */
4276                 break;
4277         case MII_RERRCOUNTER: /* rx error counter */
4278                 rc = card->stats.rx_errors;
4279                 break;
4280         case MII_SREVISION: /* silicon revision */
4281                 break;
4282         case MII_RESV1: /* reserved 1 */
4283                 break;
4284         case MII_LBRERROR: /* loopback, rx, bypass error */
4285                 break;
4286         case MII_PHYADDR: /* physical address */
4287                 break;
4288         case MII_RESV2: /* reserved 2 */
4289                 break;
4290         case MII_TPISTATUS: /* TPI status for 10mbps */
4291                 break;
4292         case MII_NCONFIG: /* network interface config */
4293                 break;
4294         default:
4295                 break;
4296         }
4297         return rc;
4298 }
4299
4300 static int qeth_snmp_command_cb(struct qeth_card *card,
4301                 struct qeth_reply *reply, unsigned long sdata)
4302 {
4303         struct qeth_ipa_cmd *cmd;
4304         struct qeth_arp_query_info *qinfo;
4305         unsigned char *data;
4306         void *snmp_data;
4307         __u16 data_len;
4308
4309         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4310
4311         cmd = (struct qeth_ipa_cmd *) sdata;
4312         data = (unsigned char *)((char *)cmd - reply->offset);
4313         qinfo = (struct qeth_arp_query_info *) reply->param;
4314
4315         if (cmd->hdr.return_code) {
4316                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4317                 return -EIO;
4318         }
4319         if (cmd->data.setadapterparms.hdr.return_code) {
4320                 cmd->hdr.return_code =
4321                         cmd->data.setadapterparms.hdr.return_code;
4322                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4323                 return -EIO;
4324         }
4325         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4326         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4327                 snmp_data = &cmd->data.setadapterparms.data.snmp;
4328                 data_len -= offsetof(struct qeth_ipa_cmd,
4329                                      data.setadapterparms.data.snmp);
4330         } else {
4331                 snmp_data = &cmd->data.setadapterparms.data.snmp.request;
4332                 data_len -= offsetof(struct qeth_ipa_cmd,
4333                                      data.setadapterparms.data.snmp.request);
4334         }
4335
4336         /* check if there is enough room in userspace */
4337         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4338                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOSPC);
4339                 return -ENOSPC;
4340         }
4341         QETH_CARD_TEXT_(card, 4, "snore%i",
4342                         cmd->data.setadapterparms.hdr.used_total);
4343         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4344                         cmd->data.setadapterparms.hdr.seq_no);
4345         /*copy entries to user buffer*/
4346         memcpy(qinfo->udata + qinfo->udata_offset, snmp_data, data_len);
4347         qinfo->udata_offset += data_len;
4348
4349         if (cmd->data.setadapterparms.hdr.seq_no <
4350             cmd->data.setadapterparms.hdr.used_total)
4351                 return 1;
4352         return 0;
4353 }
4354
4355 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4356 {
4357         struct qeth_snmp_ureq __user *ureq;
4358         struct qeth_cmd_buffer *iob;
4359         unsigned int req_len;
4360         struct qeth_arp_query_info qinfo = {0, };
4361         int rc = 0;
4362
4363         QETH_CARD_TEXT(card, 3, "snmpcmd");
4364
4365         if (IS_VM_NIC(card))
4366                 return -EOPNOTSUPP;
4367
4368         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4369             IS_LAYER3(card))
4370                 return -EOPNOTSUPP;
4371
4372         ureq = (struct qeth_snmp_ureq __user *) udata;
4373         if (get_user(qinfo.udata_len, &ureq->hdr.data_len) ||
4374             get_user(req_len, &ureq->hdr.req_len))
4375                 return -EFAULT;
4376
4377         /* Sanitize user input, to avoid overflows in iob size calculation: */
4378         if (req_len > QETH_BUFSIZE)
4379                 return -EINVAL;
4380
4381         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL, req_len);
4382         if (!iob)
4383                 return -ENOMEM;
4384
4385         if (copy_from_user(&__ipa_cmd(iob)->data.setadapterparms.data.snmp,
4386                            &ureq->cmd, req_len)) {
4387                 qeth_put_cmd(iob);
4388                 return -EFAULT;
4389         }
4390
4391         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4392         if (!qinfo.udata) {
4393                 qeth_put_cmd(iob);
4394                 return -ENOMEM;
4395         }
4396         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4397
4398         rc = qeth_send_ipa_cmd(card, iob, qeth_snmp_command_cb, &qinfo);
4399         if (rc)
4400                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4401                                  CARD_DEVID(card), rc);
4402         else {
4403                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4404                         rc = -EFAULT;
4405         }
4406
4407         kfree(qinfo.udata);
4408         return rc;
4409 }
4410
4411 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4412                 struct qeth_reply *reply, unsigned long data)
4413 {
4414         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4415         struct qeth_qoat_priv *priv;
4416         char *resdata;
4417         int resdatalen;
4418
4419         QETH_CARD_TEXT(card, 3, "qoatcb");
4420         if (qeth_setadpparms_inspect_rc(cmd))
4421                 return -EIO;
4422
4423         priv = (struct qeth_qoat_priv *)reply->param;
4424         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4425         resdata = (char *)data + 28;
4426
4427         if (resdatalen > (priv->buffer_len - priv->response_len))
4428                 return -ENOSPC;
4429
4430         memcpy((priv->buffer + priv->response_len), resdata,
4431                 resdatalen);
4432         priv->response_len += resdatalen;
4433
4434         if (cmd->data.setadapterparms.hdr.seq_no <
4435             cmd->data.setadapterparms.hdr.used_total)
4436                 return 1;
4437         return 0;
4438 }
4439
4440 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4441 {
4442         int rc = 0;
4443         struct qeth_cmd_buffer *iob;
4444         struct qeth_ipa_cmd *cmd;
4445         struct qeth_query_oat *oat_req;
4446         struct qeth_query_oat_data oat_data;
4447         struct qeth_qoat_priv priv;
4448         void __user *tmp;
4449
4450         QETH_CARD_TEXT(card, 3, "qoatcmd");
4451
4452         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4453                 rc = -EOPNOTSUPP;
4454                 goto out;
4455         }
4456
4457         if (copy_from_user(&oat_data, udata,
4458             sizeof(struct qeth_query_oat_data))) {
4459                         rc = -EFAULT;
4460                         goto out;
4461         }
4462
4463         priv.buffer_len = oat_data.buffer_len;
4464         priv.response_len = 0;
4465         priv.buffer = vzalloc(oat_data.buffer_len);
4466         if (!priv.buffer) {
4467                 rc = -ENOMEM;
4468                 goto out;
4469         }
4470
4471         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4472                                    SETADP_DATA_SIZEOF(query_oat));
4473         if (!iob) {
4474                 rc = -ENOMEM;
4475                 goto out_free;
4476         }
4477         cmd = __ipa_cmd(iob);
4478         oat_req = &cmd->data.setadapterparms.data.query_oat;
4479         oat_req->subcmd_code = oat_data.command;
4480
4481         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4482                                &priv);
4483         if (!rc) {
4484                 if (is_compat_task())
4485                         tmp = compat_ptr(oat_data.ptr);
4486                 else
4487                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4488
4489                 if (copy_to_user(tmp, priv.buffer,
4490                     priv.response_len)) {
4491                         rc = -EFAULT;
4492                         goto out_free;
4493                 }
4494
4495                 oat_data.response_len = priv.response_len;
4496
4497                 if (copy_to_user(udata, &oat_data,
4498                     sizeof(struct qeth_query_oat_data)))
4499                         rc = -EFAULT;
4500         }
4501
4502 out_free:
4503         vfree(priv.buffer);
4504 out:
4505         return rc;
4506 }
4507
4508 static int qeth_query_card_info_cb(struct qeth_card *card,
4509                                    struct qeth_reply *reply, unsigned long data)
4510 {
4511         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4512         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4513         struct qeth_query_card_info *card_info;
4514
4515         QETH_CARD_TEXT(card, 2, "qcrdincb");
4516         if (qeth_setadpparms_inspect_rc(cmd))
4517                 return -EIO;
4518
4519         card_info = &cmd->data.setadapterparms.data.card_info;
4520         carrier_info->card_type = card_info->card_type;
4521         carrier_info->port_mode = card_info->port_mode;
4522         carrier_info->port_speed = card_info->port_speed;
4523         return 0;
4524 }
4525
4526 int qeth_query_card_info(struct qeth_card *card,
4527                          struct carrier_info *carrier_info)
4528 {
4529         struct qeth_cmd_buffer *iob;
4530
4531         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4532         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4533                 return -EOPNOTSUPP;
4534         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO, 0);
4535         if (!iob)
4536                 return -ENOMEM;
4537         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4538                                         (void *)carrier_info);
4539 }
4540
4541 /**
4542  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4543  * @card: pointer to a qeth_card
4544  *
4545  * Returns
4546  *      0, if a MAC address has been set for the card's netdevice
4547  *      a return code, for various error conditions
4548  */
4549 int qeth_vm_request_mac(struct qeth_card *card)
4550 {
4551         struct diag26c_mac_resp *response;
4552         struct diag26c_mac_req *request;
4553         struct ccw_dev_id id;
4554         int rc;
4555
4556         QETH_CARD_TEXT(card, 2, "vmreqmac");
4557
4558         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4559         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4560         if (!request || !response) {
4561                 rc = -ENOMEM;
4562                 goto out;
4563         }
4564
4565         ccw_device_get_id(CARD_DDEV(card), &id);
4566         request->resp_buf_len = sizeof(*response);
4567         request->resp_version = DIAG26C_VERSION2;
4568         request->op_code = DIAG26C_GET_MAC;
4569         request->devno = id.devno;
4570
4571         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4572         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4573         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4574         if (rc)
4575                 goto out;
4576         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4577
4578         if (request->resp_buf_len < sizeof(*response) ||
4579             response->version != request->resp_version) {
4580                 rc = -EIO;
4581                 QETH_CARD_TEXT(card, 2, "badresp");
4582                 QETH_CARD_HEX(card, 2, &request->resp_buf_len,
4583                               sizeof(request->resp_buf_len));
4584         } else if (!is_valid_ether_addr(response->mac)) {
4585                 rc = -EINVAL;
4586                 QETH_CARD_TEXT(card, 2, "badmac");
4587                 QETH_CARD_HEX(card, 2, response->mac, ETH_ALEN);
4588         } else {
4589                 ether_addr_copy(card->dev->dev_addr, response->mac);
4590         }
4591
4592 out:
4593         kfree(response);
4594         kfree(request);
4595         return rc;
4596 }
4597 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4598
4599 static void qeth_determine_capabilities(struct qeth_card *card)
4600 {
4601         int rc;
4602         struct ccw_device *ddev;
4603         int ddev_offline = 0;
4604
4605         QETH_CARD_TEXT(card, 2, "detcapab");
4606         ddev = CARD_DDEV(card);
4607         if (!ddev->online) {
4608                 ddev_offline = 1;
4609                 rc = ccw_device_set_online(ddev);
4610                 if (rc) {
4611                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4612                         goto out;
4613                 }
4614         }
4615
4616         rc = qeth_read_conf_data(card);
4617         if (rc) {
4618                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4619                                  CARD_DEVID(card), rc);
4620                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4621                 goto out_offline;
4622         }
4623
4624         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4625         if (rc)
4626                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4627
4628         QETH_CARD_TEXT_(card, 2, "qfmt%d", card->ssqd.qfmt);
4629         QETH_CARD_TEXT_(card, 2, "ac1:%02x", card->ssqd.qdioac1);
4630         QETH_CARD_TEXT_(card, 2, "ac2:%04x", card->ssqd.qdioac2);
4631         QETH_CARD_TEXT_(card, 2, "ac3:%04x", card->ssqd.qdioac3);
4632         QETH_CARD_TEXT_(card, 2, "icnt%d", card->ssqd.icnt);
4633         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4634             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4635             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4636                 dev_info(&card->gdev->dev,
4637                         "Completion Queueing supported\n");
4638         } else {
4639                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4640         }
4641
4642
4643 out_offline:
4644         if (ddev_offline == 1)
4645                 ccw_device_set_offline(ddev);
4646 out:
4647         return;
4648 }
4649
4650 static void qeth_qdio_establish_cq(struct qeth_card *card,
4651                                    struct qdio_buffer **in_sbal_ptrs,
4652                                    void (**queue_start_poll)
4653                                         (struct ccw_device *, int,
4654                                          unsigned long))
4655 {
4656         int i;
4657
4658         if (card->options.cq == QETH_CQ_ENABLED) {
4659                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4660                              (card->qdio.no_in_queues - 1);
4661                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4662                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4663                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4664                 }
4665
4666                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4667         }
4668 }
4669
4670 static int qeth_qdio_establish(struct qeth_card *card)
4671 {
4672         struct qdio_initialize init_data;
4673         char *qib_param_field;
4674         struct qdio_buffer **in_sbal_ptrs;
4675         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4676         struct qdio_buffer **out_sbal_ptrs;
4677         int i, j, k;
4678         int rc = 0;
4679
4680         QETH_CARD_TEXT(card, 2, "qdioest");
4681
4682         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4683                                   GFP_KERNEL);
4684         if (!qib_param_field) {
4685                 rc =  -ENOMEM;
4686                 goto out_free_nothing;
4687         }
4688
4689         qeth_create_qib_param_field(card, qib_param_field);
4690         qeth_create_qib_param_field_blkt(card, qib_param_field);
4691
4692         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4693                                sizeof(void *),
4694                                GFP_KERNEL);
4695         if (!in_sbal_ptrs) {
4696                 rc = -ENOMEM;
4697                 goto out_free_qib_param;
4698         }
4699         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4700                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4701                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4702         }
4703
4704         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4705                                    GFP_KERNEL);
4706         if (!queue_start_poll) {
4707                 rc = -ENOMEM;
4708                 goto out_free_in_sbals;
4709         }
4710         for (i = 0; i < card->qdio.no_in_queues; ++i)
4711                 queue_start_poll[i] = qeth_qdio_start_poll;
4712
4713         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4714
4715         out_sbal_ptrs =
4716                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4717                         sizeof(void *),
4718                         GFP_KERNEL);
4719         if (!out_sbal_ptrs) {
4720                 rc = -ENOMEM;
4721                 goto out_free_queue_start_poll;
4722         }
4723         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4724                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4725                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4726                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4727                 }
4728
4729         memset(&init_data, 0, sizeof(struct qdio_initialize));
4730         init_data.cdev                   = CARD_DDEV(card);
4731         init_data.q_format               = IS_IQD(card) ? QDIO_IQDIO_QFMT :
4732                                                           QDIO_QETH_QFMT;
4733         init_data.qib_param_field_format = 0;
4734         init_data.qib_param_field        = qib_param_field;
4735         init_data.no_input_qs            = card->qdio.no_in_queues;
4736         init_data.no_output_qs           = card->qdio.no_out_queues;
4737         init_data.input_handler          = qeth_qdio_input_handler;
4738         init_data.output_handler         = qeth_qdio_output_handler;
4739         init_data.queue_start_poll_array = queue_start_poll;
4740         init_data.int_parm               = (unsigned long) card;
4741         init_data.input_sbal_addr_array  = in_sbal_ptrs;
4742         init_data.output_sbal_addr_array = out_sbal_ptrs;
4743         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4744         init_data.scan_threshold         = IS_IQD(card) ? 1 : 32;
4745
4746         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4747                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4748                 rc = qdio_allocate(&init_data);
4749                 if (rc) {
4750                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4751                         goto out;
4752                 }
4753                 rc = qdio_establish(&init_data);
4754                 if (rc) {
4755                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4756                         qdio_free(CARD_DDEV(card));
4757                 }
4758         }
4759
4760         switch (card->options.cq) {
4761         case QETH_CQ_ENABLED:
4762                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
4763                 break;
4764         case QETH_CQ_DISABLED:
4765                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
4766                 break;
4767         default:
4768                 break;
4769         }
4770 out:
4771         kfree(out_sbal_ptrs);
4772 out_free_queue_start_poll:
4773         kfree(queue_start_poll);
4774 out_free_in_sbals:
4775         kfree(in_sbal_ptrs);
4776 out_free_qib_param:
4777         kfree(qib_param_field);
4778 out_free_nothing:
4779         return rc;
4780 }
4781
4782 static void qeth_core_free_card(struct qeth_card *card)
4783 {
4784         QETH_CARD_TEXT(card, 2, "freecrd");
4785         qeth_clean_channel(&card->read);
4786         qeth_clean_channel(&card->write);
4787         qeth_clean_channel(&card->data);
4788         qeth_put_cmd(card->read_cmd);
4789         destroy_workqueue(card->event_wq);
4790         qeth_free_qdio_queues(card);
4791         unregister_service_level(&card->qeth_service_level);
4792         dev_set_drvdata(&card->gdev->dev, NULL);
4793         kfree(card);
4794 }
4795
4796 void qeth_trace_features(struct qeth_card *card)
4797 {
4798         QETH_CARD_TEXT(card, 2, "features");
4799         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
4800         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
4801         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
4802         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
4803                       sizeof(card->info.diagass_support));
4804 }
4805 EXPORT_SYMBOL_GPL(qeth_trace_features);
4806
4807 static struct ccw_device_id qeth_ids[] = {
4808         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
4809                                         .driver_info = QETH_CARD_TYPE_OSD},
4810         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
4811                                         .driver_info = QETH_CARD_TYPE_IQD},
4812         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
4813                                         .driver_info = QETH_CARD_TYPE_OSN},
4814         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
4815                                         .driver_info = QETH_CARD_TYPE_OSM},
4816         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
4817                                         .driver_info = QETH_CARD_TYPE_OSX},
4818         {},
4819 };
4820 MODULE_DEVICE_TABLE(ccw, qeth_ids);
4821
4822 static struct ccw_driver qeth_ccw_driver = {
4823         .driver = {
4824                 .owner = THIS_MODULE,
4825                 .name = "qeth",
4826         },
4827         .ids = qeth_ids,
4828         .probe = ccwgroup_probe_ccwdev,
4829         .remove = ccwgroup_remove_ccwdev,
4830 };
4831
4832 int qeth_core_hardsetup_card(struct qeth_card *card, bool *carrier_ok)
4833 {
4834         int retries = 3;
4835         int rc;
4836
4837         QETH_CARD_TEXT(card, 2, "hrdsetup");
4838         atomic_set(&card->force_alloc_skb, 0);
4839         rc = qeth_update_from_chp_desc(card);
4840         if (rc)
4841                 return rc;
4842 retry:
4843         if (retries < 3)
4844                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
4845                                  CARD_DEVID(card));
4846         rc = qeth_qdio_clear_card(card, !IS_IQD(card));
4847         ccw_device_set_offline(CARD_DDEV(card));
4848         ccw_device_set_offline(CARD_WDEV(card));
4849         ccw_device_set_offline(CARD_RDEV(card));
4850         qdio_free(CARD_DDEV(card));
4851         rc = ccw_device_set_online(CARD_RDEV(card));
4852         if (rc)
4853                 goto retriable;
4854         rc = ccw_device_set_online(CARD_WDEV(card));
4855         if (rc)
4856                 goto retriable;
4857         rc = ccw_device_set_online(CARD_DDEV(card));
4858         if (rc)
4859                 goto retriable;
4860 retriable:
4861         if (rc == -ERESTARTSYS) {
4862                 QETH_CARD_TEXT(card, 2, "break1");
4863                 return rc;
4864         } else if (rc) {
4865                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
4866                 if (--retries < 0)
4867                         goto out;
4868                 else
4869                         goto retry;
4870         }
4871         qeth_determine_capabilities(card);
4872         qeth_init_tokens(card);
4873         qeth_init_func_level(card);
4874
4875         rc = qeth_idx_activate_read_channel(card);
4876         if (rc == -EINTR) {
4877                 QETH_CARD_TEXT(card, 2, "break2");
4878                 return rc;
4879         } else if (rc) {
4880                 QETH_CARD_TEXT_(card, 2, "3err%d", rc);
4881                 if (--retries < 0)
4882                         goto out;
4883                 else
4884                         goto retry;
4885         }
4886
4887         rc = qeth_idx_activate_write_channel(card);
4888         if (rc == -EINTR) {
4889                 QETH_CARD_TEXT(card, 2, "break3");
4890                 return rc;
4891         } else if (rc) {
4892                 QETH_CARD_TEXT_(card, 2, "4err%d", rc);
4893                 if (--retries < 0)
4894                         goto out;
4895                 else
4896                         goto retry;
4897         }
4898         card->read_or_write_problem = 0;
4899         rc = qeth_mpc_initialize(card);
4900         if (rc) {
4901                 QETH_CARD_TEXT_(card, 2, "5err%d", rc);
4902                 goto out;
4903         }
4904
4905         rc = qeth_send_startlan(card);
4906         if (rc) {
4907                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
4908                 if (rc == -ENETDOWN) {
4909                         dev_warn(&card->gdev->dev, "The LAN is offline\n");
4910                         *carrier_ok = false;
4911                 } else {
4912                         goto out;
4913                 }
4914         } else {
4915                 *carrier_ok = true;
4916         }
4917
4918         card->options.ipa4.supported_funcs = 0;
4919         card->options.ipa6.supported_funcs = 0;
4920         card->options.adp.supported_funcs = 0;
4921         card->options.sbp.supported_funcs = 0;
4922         card->info.diagass_support = 0;
4923         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
4924         if (rc == -ENOMEM)
4925                 goto out;
4926         if (qeth_is_supported(card, IPA_IPV6)) {
4927                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
4928                 if (rc == -ENOMEM)
4929                         goto out;
4930         }
4931         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
4932                 rc = qeth_query_setadapterparms(card);
4933                 if (rc < 0) {
4934                         QETH_CARD_TEXT_(card, 2, "7err%d", rc);
4935                         goto out;
4936                 }
4937         }
4938         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
4939                 rc = qeth_query_setdiagass(card);
4940                 if (rc < 0) {
4941                         QETH_CARD_TEXT_(card, 2, "8err%d", rc);
4942                         goto out;
4943                 }
4944         }
4945         return 0;
4946 out:
4947         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
4948                 "an error on the device\n");
4949         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
4950                          CARD_DEVID(card), rc);
4951         return rc;
4952 }
4953 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
4954
4955 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
4956                                  struct sk_buff *skb, int offset, int data_len)
4957 {
4958         struct page *page = virt_to_page(element->addr);
4959         unsigned int next_frag;
4960
4961         /* first fill the linear space */
4962         if (!skb->len) {
4963                 unsigned int linear = min(data_len, skb_tailroom(skb));
4964
4965                 skb_put_data(skb, element->addr + offset, linear);
4966                 data_len -= linear;
4967                 if (!data_len)
4968                         return;
4969                 offset += linear;
4970                 /* fall through to add page frag for remaining data */
4971         }
4972
4973         next_frag = skb_shinfo(skb)->nr_frags;
4974         get_page(page);
4975         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
4976 }
4977
4978 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
4979 {
4980         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
4981 }
4982
4983 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
4984                 struct qeth_qdio_buffer *qethbuffer,
4985                 struct qdio_buffer_element **__element, int *__offset,
4986                 struct qeth_hdr **hdr)
4987 {
4988         struct qdio_buffer_element *element = *__element;
4989         struct qdio_buffer *buffer = qethbuffer->buffer;
4990         int offset = *__offset;
4991         struct sk_buff *skb;
4992         int skb_len = 0;
4993         void *data_ptr;
4994         int data_len;
4995         int headroom = 0;
4996         int use_rx_sg = 0;
4997
4998         /* qeth_hdr must not cross element boundaries */
4999         while (element->length < offset + sizeof(struct qeth_hdr)) {
5000                 if (qeth_is_last_sbale(element))
5001                         return NULL;
5002                 element++;
5003                 offset = 0;
5004         }
5005         *hdr = element->addr + offset;
5006
5007         offset += sizeof(struct qeth_hdr);
5008         switch ((*hdr)->hdr.l2.id) {
5009         case QETH_HEADER_TYPE_LAYER2:
5010                 skb_len = (*hdr)->hdr.l2.pkt_length;
5011                 break;
5012         case QETH_HEADER_TYPE_LAYER3:
5013                 skb_len = (*hdr)->hdr.l3.length;
5014                 headroom = ETH_HLEN;
5015                 break;
5016         case QETH_HEADER_TYPE_OSN:
5017                 skb_len = (*hdr)->hdr.osn.pdu_length;
5018                 headroom = sizeof(struct qeth_hdr);
5019                 break;
5020         default:
5021                 break;
5022         }
5023
5024         if (!skb_len)
5025                 return NULL;
5026
5027         if (((skb_len >= card->options.rx_sg_cb) &&
5028              !IS_OSN(card) &&
5029              (!atomic_read(&card->force_alloc_skb))) ||
5030             (card->options.cq == QETH_CQ_ENABLED))
5031                 use_rx_sg = 1;
5032
5033         if (use_rx_sg && qethbuffer->rx_skb) {
5034                 /* QETH_CQ_ENABLED only: */
5035                 skb = qethbuffer->rx_skb;
5036                 qethbuffer->rx_skb = NULL;
5037         } else {
5038                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5039
5040                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5041         }
5042         if (!skb)
5043                 goto no_mem;
5044         if (headroom)
5045                 skb_reserve(skb, headroom);
5046
5047         data_ptr = element->addr + offset;
5048         while (skb_len) {
5049                 data_len = min(skb_len, (int)(element->length - offset));
5050                 if (data_len) {
5051                         if (use_rx_sg)
5052                                 qeth_create_skb_frag(element, skb, offset,
5053                                                      data_len);
5054                         else
5055                                 skb_put_data(skb, data_ptr, data_len);
5056                 }
5057                 skb_len -= data_len;
5058                 if (skb_len) {
5059                         if (qeth_is_last_sbale(element)) {
5060                                 QETH_CARD_TEXT(card, 4, "unexeob");
5061                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5062                                 dev_kfree_skb_any(skb);
5063                                 QETH_CARD_STAT_INC(card, rx_errors);
5064                                 return NULL;
5065                         }
5066                         element++;
5067                         offset = 0;
5068                         data_ptr = element->addr;
5069                 } else {
5070                         offset += data_len;
5071                 }
5072         }
5073         *__element = element;
5074         *__offset = offset;
5075         if (use_rx_sg) {
5076                 QETH_CARD_STAT_INC(card, rx_sg_skbs);
5077                 QETH_CARD_STAT_ADD(card, rx_sg_frags,
5078                                    skb_shinfo(skb)->nr_frags);
5079         }
5080         return skb;
5081 no_mem:
5082         if (net_ratelimit()) {
5083                 QETH_CARD_TEXT(card, 2, "noskbmem");
5084         }
5085         QETH_CARD_STAT_INC(card, rx_dropped);
5086         return NULL;
5087 }
5088 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5089
5090 int qeth_poll(struct napi_struct *napi, int budget)
5091 {
5092         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5093         int work_done = 0;
5094         struct qeth_qdio_buffer *buffer;
5095         int done;
5096         int new_budget = budget;
5097
5098         while (1) {
5099                 if (!card->rx.b_count) {
5100                         card->rx.qdio_err = 0;
5101                         card->rx.b_count = qdio_get_next_buffers(
5102                                 card->data.ccwdev, 0, &card->rx.b_index,
5103                                 &card->rx.qdio_err);
5104                         if (card->rx.b_count <= 0) {
5105                                 card->rx.b_count = 0;
5106                                 break;
5107                         }
5108                         card->rx.b_element =
5109                                 &card->qdio.in_q->bufs[card->rx.b_index]
5110                                 .buffer->element[0];
5111                         card->rx.e_offset = 0;
5112                 }
5113
5114                 while (card->rx.b_count) {
5115                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5116                         if (!(card->rx.qdio_err &&
5117                             qeth_check_qdio_errors(card, buffer->buffer,
5118                             card->rx.qdio_err, "qinerr")))
5119                                 work_done +=
5120                                         card->discipline->process_rx_buffer(
5121                                                 card, new_budget, &done);
5122                         else
5123                                 done = 1;
5124
5125                         if (done) {
5126                                 QETH_CARD_STAT_INC(card, rx_bufs);
5127                                 qeth_put_buffer_pool_entry(card,
5128                                         buffer->pool_entry);
5129                                 qeth_queue_input_buffer(card, card->rx.b_index);
5130                                 card->rx.b_count--;
5131                                 if (card->rx.b_count) {
5132                                         card->rx.b_index =
5133                                                 (card->rx.b_index + 1) %
5134                                                 QDIO_MAX_BUFFERS_PER_Q;
5135                                         card->rx.b_element =
5136                                                 &card->qdio.in_q
5137                                                 ->bufs[card->rx.b_index]
5138                                                 .buffer->element[0];
5139                                         card->rx.e_offset = 0;
5140                                 }
5141                         }
5142
5143                         if (work_done >= budget)
5144                                 goto out;
5145                         else
5146                                 new_budget = budget - work_done;
5147                 }
5148         }
5149
5150         napi_complete_done(napi, work_done);
5151         if (qdio_start_irq(card->data.ccwdev, 0))
5152                 napi_schedule(&card->napi);
5153 out:
5154         return work_done;
5155 }
5156 EXPORT_SYMBOL_GPL(qeth_poll);
5157
5158 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5159 {
5160         if (!cmd->hdr.return_code)
5161                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5162         return cmd->hdr.return_code;
5163 }
5164
5165 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5166                                         struct qeth_reply *reply,
5167                                         unsigned long data)
5168 {
5169         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5170         struct qeth_ipa_caps *caps = reply->param;
5171
5172         if (qeth_setassparms_inspect_rc(cmd))
5173                 return -EIO;
5174
5175         caps->supported = cmd->data.setassparms.data.caps.supported;
5176         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5177         return 0;
5178 }
5179
5180 int qeth_setassparms_cb(struct qeth_card *card,
5181                         struct qeth_reply *reply, unsigned long data)
5182 {
5183         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5184
5185         QETH_CARD_TEXT(card, 4, "defadpcb");
5186
5187         if (cmd->hdr.return_code)
5188                 return -EIO;
5189
5190         cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5191         if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5192                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5193         if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5194                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5195         return 0;
5196 }
5197 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5198
5199 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5200                                                  enum qeth_ipa_funcs ipa_func,
5201                                                  u16 cmd_code,
5202                                                  unsigned int data_length,
5203                                                  enum qeth_prot_versions prot)
5204 {
5205         struct qeth_ipacmd_setassparms *setassparms;
5206         struct qeth_ipacmd_setassparms_hdr *hdr;
5207         struct qeth_cmd_buffer *iob;
5208
5209         QETH_CARD_TEXT(card, 4, "getasscm");
5210         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETASSPARMS, prot,
5211                                  data_length +
5212                                  offsetof(struct qeth_ipacmd_setassparms,
5213                                           data));
5214         if (!iob)
5215                 return NULL;
5216
5217         setassparms = &__ipa_cmd(iob)->data.setassparms;
5218         setassparms->assist_no = ipa_func;
5219
5220         hdr = &setassparms->hdr;
5221         hdr->length = sizeof(*hdr) + data_length;
5222         hdr->command_code = cmd_code;
5223         return iob;
5224 }
5225 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5226
5227 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5228                                       enum qeth_ipa_funcs ipa_func,
5229                                       u16 cmd_code, u32 *data,
5230                                       enum qeth_prot_versions prot)
5231 {
5232         unsigned int length = data ? SETASS_DATA_SIZEOF(flags_32bit) : 0;
5233         struct qeth_cmd_buffer *iob;
5234
5235         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5236         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5237         if (!iob)
5238                 return -ENOMEM;
5239
5240         if (data)
5241                 __ipa_cmd(iob)->data.setassparms.data.flags_32bit = *data;
5242         return qeth_send_ipa_cmd(card, iob, qeth_setassparms_cb, NULL);
5243 }
5244 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5245
5246 static void qeth_unregister_dbf_views(void)
5247 {
5248         int x;
5249         for (x = 0; x < QETH_DBF_INFOS; x++) {
5250                 debug_unregister(qeth_dbf[x].id);
5251                 qeth_dbf[x].id = NULL;
5252         }
5253 }
5254
5255 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5256 {
5257         char dbf_txt_buf[32];
5258         va_list args;
5259
5260         if (!debug_level_enabled(id, level))
5261                 return;
5262         va_start(args, fmt);
5263         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5264         va_end(args);
5265         debug_text_event(id, level, dbf_txt_buf);
5266 }
5267 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5268
5269 static int qeth_register_dbf_views(void)
5270 {
5271         int ret;
5272         int x;
5273
5274         for (x = 0; x < QETH_DBF_INFOS; x++) {
5275                 /* register the areas */
5276                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5277                                                 qeth_dbf[x].pages,
5278                                                 qeth_dbf[x].areas,
5279                                                 qeth_dbf[x].len);
5280                 if (qeth_dbf[x].id == NULL) {
5281                         qeth_unregister_dbf_views();
5282                         return -ENOMEM;
5283                 }
5284
5285                 /* register a view */
5286                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5287                 if (ret) {
5288                         qeth_unregister_dbf_views();
5289                         return ret;
5290                 }
5291
5292                 /* set a passing level */
5293                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5294         }
5295
5296         return 0;
5297 }
5298
5299 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5300
5301 int qeth_core_load_discipline(struct qeth_card *card,
5302                 enum qeth_discipline_id discipline)
5303 {
5304         mutex_lock(&qeth_mod_mutex);
5305         switch (discipline) {
5306         case QETH_DISCIPLINE_LAYER3:
5307                 card->discipline = try_then_request_module(
5308                         symbol_get(qeth_l3_discipline), "qeth_l3");
5309                 break;
5310         case QETH_DISCIPLINE_LAYER2:
5311                 card->discipline = try_then_request_module(
5312                         symbol_get(qeth_l2_discipline), "qeth_l2");
5313                 break;
5314         default:
5315                 break;
5316         }
5317         mutex_unlock(&qeth_mod_mutex);
5318
5319         if (!card->discipline) {
5320                 dev_err(&card->gdev->dev, "There is no kernel module to "
5321                         "support discipline %d\n", discipline);
5322                 return -EINVAL;
5323         }
5324
5325         card->options.layer = discipline;
5326         return 0;
5327 }
5328
5329 void qeth_core_free_discipline(struct qeth_card *card)
5330 {
5331         if (IS_LAYER2(card))
5332                 symbol_put(qeth_l2_discipline);
5333         else
5334                 symbol_put(qeth_l3_discipline);
5335         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5336         card->discipline = NULL;
5337 }
5338
5339 const struct device_type qeth_generic_devtype = {
5340         .name = "qeth_generic",
5341         .groups = qeth_generic_attr_groups,
5342 };
5343 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5344
5345 static const struct device_type qeth_osn_devtype = {
5346         .name = "qeth_osn",
5347         .groups = qeth_osn_attr_groups,
5348 };
5349
5350 #define DBF_NAME_LEN    20
5351
5352 struct qeth_dbf_entry {
5353         char dbf_name[DBF_NAME_LEN];
5354         debug_info_t *dbf_info;
5355         struct list_head dbf_list;
5356 };
5357
5358 static LIST_HEAD(qeth_dbf_list);
5359 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5360
5361 static debug_info_t *qeth_get_dbf_entry(char *name)
5362 {
5363         struct qeth_dbf_entry *entry;
5364         debug_info_t *rc = NULL;
5365
5366         mutex_lock(&qeth_dbf_list_mutex);
5367         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5368                 if (strcmp(entry->dbf_name, name) == 0) {
5369                         rc = entry->dbf_info;
5370                         break;
5371                 }
5372         }
5373         mutex_unlock(&qeth_dbf_list_mutex);
5374         return rc;
5375 }
5376
5377 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5378 {
5379         struct qeth_dbf_entry *new_entry;
5380
5381         card->debug = debug_register(name, 2, 1, 8);
5382         if (!card->debug) {
5383                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5384                 goto err;
5385         }
5386         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5387                 goto err_dbg;
5388         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5389         if (!new_entry)
5390                 goto err_dbg;
5391         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5392         new_entry->dbf_info = card->debug;
5393         mutex_lock(&qeth_dbf_list_mutex);
5394         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5395         mutex_unlock(&qeth_dbf_list_mutex);
5396
5397         return 0;
5398
5399 err_dbg:
5400         debug_unregister(card->debug);
5401 err:
5402         return -ENOMEM;
5403 }
5404
5405 static void qeth_clear_dbf_list(void)
5406 {
5407         struct qeth_dbf_entry *entry, *tmp;
5408
5409         mutex_lock(&qeth_dbf_list_mutex);
5410         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5411                 list_del(&entry->dbf_list);
5412                 debug_unregister(entry->dbf_info);
5413                 kfree(entry);
5414         }
5415         mutex_unlock(&qeth_dbf_list_mutex);
5416 }
5417
5418 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5419 {
5420         struct net_device *dev;
5421
5422         switch (card->info.type) {
5423         case QETH_CARD_TYPE_IQD:
5424                 dev = alloc_netdev_mqs(0, "hsi%d", NET_NAME_UNKNOWN,
5425                                        ether_setup, QETH_MAX_QUEUES, 1);
5426                 break;
5427         case QETH_CARD_TYPE_OSM:
5428                 dev = alloc_etherdev(0);
5429                 break;
5430         case QETH_CARD_TYPE_OSN:
5431                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5432                 break;
5433         default:
5434                 dev = alloc_etherdev_mqs(0, QETH_MAX_QUEUES, 1);
5435         }
5436
5437         if (!dev)
5438                 return NULL;
5439
5440         dev->ml_priv = card;
5441         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5442         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5443          /* initialized when device first goes online: */
5444         dev->max_mtu = 0;
5445         dev->mtu = 0;
5446         SET_NETDEV_DEV(dev, &card->gdev->dev);
5447         netif_carrier_off(dev);
5448
5449         if (IS_OSN(card)) {
5450                 dev->ethtool_ops = &qeth_osn_ethtool_ops;
5451         } else {
5452                 dev->ethtool_ops = &qeth_ethtool_ops;
5453                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5454                 dev->hw_features |= NETIF_F_SG;
5455                 dev->vlan_features |= NETIF_F_SG;
5456                 if (IS_IQD(card)) {
5457                         dev->features |= NETIF_F_SG;
5458                         if (netif_set_real_num_tx_queues(dev,
5459                                                          QETH_IQD_MIN_TXQ)) {
5460                                 free_netdev(dev);
5461                                 return NULL;
5462                         }
5463                 }
5464         }
5465
5466         return dev;
5467 }
5468
5469 struct net_device *qeth_clone_netdev(struct net_device *orig)
5470 {
5471         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5472
5473         if (!clone)
5474                 return NULL;
5475
5476         clone->dev_port = orig->dev_port;
5477         return clone;
5478 }
5479
5480 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5481 {
5482         struct qeth_card *card;
5483         struct device *dev;
5484         int rc;
5485         enum qeth_discipline_id enforced_disc;
5486         char dbf_name[DBF_NAME_LEN];
5487
5488         QETH_DBF_TEXT(SETUP, 2, "probedev");
5489
5490         dev = &gdev->dev;
5491         if (!get_device(dev))
5492                 return -ENODEV;
5493
5494         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5495
5496         card = qeth_alloc_card(gdev);
5497         if (!card) {
5498                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5499                 rc = -ENOMEM;
5500                 goto err_dev;
5501         }
5502
5503         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5504                 dev_name(&gdev->dev));
5505         card->debug = qeth_get_dbf_entry(dbf_name);
5506         if (!card->debug) {
5507                 rc = qeth_add_dbf_entry(card, dbf_name);
5508                 if (rc)
5509                         goto err_card;
5510         }
5511
5512         qeth_setup_card(card);
5513         card->dev = qeth_alloc_netdev(card);
5514         if (!card->dev) {
5515                 rc = -ENOMEM;
5516                 goto err_card;
5517         }
5518
5519         card->qdio.no_out_queues = card->dev->num_tx_queues;
5520         rc = qeth_update_from_chp_desc(card);
5521         if (rc)
5522                 goto err_chp_desc;
5523         qeth_determine_capabilities(card);
5524         qeth_set_blkt_defaults(card);
5525
5526         enforced_disc = qeth_enforce_discipline(card);
5527         switch (enforced_disc) {
5528         case QETH_DISCIPLINE_UNDETERMINED:
5529                 gdev->dev.type = &qeth_generic_devtype;
5530                 break;
5531         default:
5532                 card->info.layer_enforced = true;
5533                 rc = qeth_core_load_discipline(card, enforced_disc);
5534                 if (rc)
5535                         goto err_load;
5536
5537                 gdev->dev.type = IS_OSN(card) ? &qeth_osn_devtype :
5538                                                 card->discipline->devtype;
5539                 rc = card->discipline->setup(card->gdev);
5540                 if (rc)
5541                         goto err_disc;
5542                 break;
5543         }
5544
5545         return 0;
5546
5547 err_disc:
5548         qeth_core_free_discipline(card);
5549 err_load:
5550 err_chp_desc:
5551         free_netdev(card->dev);
5552 err_card:
5553         qeth_core_free_card(card);
5554 err_dev:
5555         put_device(dev);
5556         return rc;
5557 }
5558
5559 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5560 {
5561         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5562
5563         QETH_CARD_TEXT(card, 2, "removedv");
5564
5565         if (card->discipline) {
5566                 card->discipline->remove(gdev);
5567                 qeth_core_free_discipline(card);
5568         }
5569
5570         free_netdev(card->dev);
5571         qeth_core_free_card(card);
5572         put_device(&gdev->dev);
5573 }
5574
5575 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5576 {
5577         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5578         int rc = 0;
5579         enum qeth_discipline_id def_discipline;
5580
5581         if (!card->discipline) {
5582                 def_discipline = IS_IQD(card) ? QETH_DISCIPLINE_LAYER3 :
5583                                                 QETH_DISCIPLINE_LAYER2;
5584                 rc = qeth_core_load_discipline(card, def_discipline);
5585                 if (rc)
5586                         goto err;
5587                 rc = card->discipline->setup(card->gdev);
5588                 if (rc) {
5589                         qeth_core_free_discipline(card);
5590                         goto err;
5591                 }
5592         }
5593         rc = card->discipline->set_online(gdev);
5594 err:
5595         return rc;
5596 }
5597
5598 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5599 {
5600         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5601         return card->discipline->set_offline(gdev);
5602 }
5603
5604 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5605 {
5606         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5607         qeth_set_allowed_threads(card, 0, 1);
5608         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5609                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5610         qeth_qdio_clear_card(card, 0);
5611         qeth_drain_output_queues(card);
5612         qdio_free(CARD_DDEV(card));
5613 }
5614
5615 static int qeth_suspend(struct ccwgroup_device *gdev)
5616 {
5617         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5618
5619         qeth_set_allowed_threads(card, 0, 1);
5620         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
5621         if (gdev->state == CCWGROUP_OFFLINE)
5622                 return 0;
5623
5624         card->discipline->set_offline(gdev);
5625         return 0;
5626 }
5627
5628 static int qeth_resume(struct ccwgroup_device *gdev)
5629 {
5630         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5631         int rc;
5632
5633         rc = card->discipline->set_online(gdev);
5634
5635         qeth_set_allowed_threads(card, 0xffffffff, 0);
5636         if (rc)
5637                 dev_warn(&card->gdev->dev, "The qeth device driver failed to recover an error on the device\n");
5638         return rc;
5639 }
5640
5641 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5642                            size_t count)
5643 {
5644         int err;
5645
5646         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5647                                   buf);
5648
5649         return err ? err : count;
5650 }
5651 static DRIVER_ATTR_WO(group);
5652
5653 static struct attribute *qeth_drv_attrs[] = {
5654         &driver_attr_group.attr,
5655         NULL,
5656 };
5657 static struct attribute_group qeth_drv_attr_group = {
5658         .attrs = qeth_drv_attrs,
5659 };
5660 static const struct attribute_group *qeth_drv_attr_groups[] = {
5661         &qeth_drv_attr_group,
5662         NULL,
5663 };
5664
5665 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5666         .driver = {
5667                 .groups = qeth_drv_attr_groups,
5668                 .owner = THIS_MODULE,
5669                 .name = "qeth",
5670         },
5671         .ccw_driver = &qeth_ccw_driver,
5672         .setup = qeth_core_probe_device,
5673         .remove = qeth_core_remove_device,
5674         .set_online = qeth_core_set_online,
5675         .set_offline = qeth_core_set_offline,
5676         .shutdown = qeth_core_shutdown,
5677         .prepare = NULL,
5678         .complete = NULL,
5679         .freeze = qeth_suspend,
5680         .thaw = qeth_resume,
5681         .restore = qeth_resume,
5682 };
5683
5684 struct qeth_card *qeth_get_card_by_busid(char *bus_id)
5685 {
5686         struct ccwgroup_device *gdev;
5687         struct qeth_card *card;
5688
5689         gdev = get_ccwgroupdev_by_busid(&qeth_core_ccwgroup_driver, bus_id);
5690         if (!gdev)
5691                 return NULL;
5692
5693         card = dev_get_drvdata(&gdev->dev);
5694         put_device(&gdev->dev);
5695         return card;
5696 }
5697 EXPORT_SYMBOL_GPL(qeth_get_card_by_busid);
5698
5699 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5700 {
5701         struct qeth_card *card = dev->ml_priv;
5702         struct mii_ioctl_data *mii_data;
5703         int rc = 0;
5704
5705         if (!card)
5706                 return -ENODEV;
5707
5708         switch (cmd) {
5709         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5710                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5711                 break;
5712         case SIOC_QETH_GET_CARD_TYPE:
5713                 if ((IS_OSD(card) || IS_OSM(card) || IS_OSX(card)) &&
5714                     !IS_VM_NIC(card))
5715                         return 1;
5716                 return 0;
5717         case SIOCGMIIPHY:
5718                 mii_data = if_mii(rq);
5719                 mii_data->phy_id = 0;
5720                 break;
5721         case SIOCGMIIREG:
5722                 mii_data = if_mii(rq);
5723                 if (mii_data->phy_id != 0)
5724                         rc = -EINVAL;
5725                 else
5726                         mii_data->val_out = qeth_mdio_read(dev,
5727                                 mii_data->phy_id, mii_data->reg_num);
5728                 break;
5729         case SIOC_QETH_QUERY_OAT:
5730                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5731                 break;
5732         default:
5733                 if (card->discipline->do_ioctl)
5734                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5735                 else
5736                         rc = -EOPNOTSUPP;
5737         }
5738         if (rc)
5739                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5740         return rc;
5741 }
5742 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5743
5744 static int qeth_start_csum_cb(struct qeth_card *card, struct qeth_reply *reply,
5745                               unsigned long data)
5746 {
5747         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5748         u32 *features = reply->param;
5749
5750         if (qeth_setassparms_inspect_rc(cmd))
5751                 return -EIO;
5752
5753         *features = cmd->data.setassparms.data.flags_32bit;
5754         return 0;
5755 }
5756
5757 static int qeth_set_csum_off(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5758                              enum qeth_prot_versions prot)
5759 {
5760         return qeth_send_simple_setassparms_prot(card, cstype, IPA_CMD_ASS_STOP,
5761                                                  NULL, prot);
5762 }
5763
5764 static int qeth_set_csum_on(struct qeth_card *card, enum qeth_ipa_funcs cstype,
5765                             enum qeth_prot_versions prot)
5766 {
5767         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
5768         struct qeth_cmd_buffer *iob;
5769         struct qeth_ipa_caps caps;
5770         u32 features;
5771         int rc;
5772
5773         /* some L3 HW requires combined L3+L4 csum offload: */
5774         if (IS_LAYER3(card) && prot == QETH_PROT_IPV4 &&
5775             cstype == IPA_OUTBOUND_CHECKSUM)
5776                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
5777
5778         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_START, 0,
5779                                        prot);
5780         if (!iob)
5781                 return -ENOMEM;
5782
5783         rc = qeth_send_ipa_cmd(card, iob, qeth_start_csum_cb, &features);
5784         if (rc)
5785                 return rc;
5786
5787         if ((required_features & features) != required_features) {
5788                 qeth_set_csum_off(card, cstype, prot);
5789                 return -EOPNOTSUPP;
5790         }
5791
5792         iob = qeth_get_setassparms_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
5793                                        SETASS_DATA_SIZEOF(flags_32bit),
5794                                        prot);
5795         if (!iob) {
5796                 qeth_set_csum_off(card, cstype, prot);
5797                 return -ENOMEM;
5798         }
5799
5800         if (features & QETH_IPA_CHECKSUM_LP2LP)
5801                 required_features |= QETH_IPA_CHECKSUM_LP2LP;
5802         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = required_features;
5803         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5804         if (rc) {
5805                 qeth_set_csum_off(card, cstype, prot);
5806                 return rc;
5807         }
5808
5809         if (!qeth_ipa_caps_supported(&caps, required_features) ||
5810             !qeth_ipa_caps_enabled(&caps, required_features)) {
5811                 qeth_set_csum_off(card, cstype, prot);
5812                 return -EOPNOTSUPP;
5813         }
5814
5815         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
5816                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
5817         if (!qeth_ipa_caps_enabled(&caps, QETH_IPA_CHECKSUM_LP2LP) &&
5818             cstype == IPA_OUTBOUND_CHECKSUM)
5819                 dev_warn(&card->gdev->dev,
5820                          "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
5821                          QETH_CARD_IFNAME(card));
5822         return 0;
5823 }
5824
5825 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
5826                              enum qeth_prot_versions prot)
5827 {
5828         return on ? qeth_set_csum_on(card, cstype, prot) :
5829                     qeth_set_csum_off(card, cstype, prot);
5830 }
5831
5832 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
5833                              unsigned long data)
5834 {
5835         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5836         struct qeth_tso_start_data *tso_data = reply->param;
5837
5838         if (qeth_setassparms_inspect_rc(cmd))
5839                 return -EIO;
5840
5841         tso_data->mss = cmd->data.setassparms.data.tso.mss;
5842         tso_data->supported = cmd->data.setassparms.data.tso.supported;
5843         return 0;
5844 }
5845
5846 static int qeth_set_tso_off(struct qeth_card *card,
5847                             enum qeth_prot_versions prot)
5848 {
5849         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
5850                                                  IPA_CMD_ASS_STOP, NULL, prot);
5851 }
5852
5853 static int qeth_set_tso_on(struct qeth_card *card,
5854                            enum qeth_prot_versions prot)
5855 {
5856         struct qeth_tso_start_data tso_data;
5857         struct qeth_cmd_buffer *iob;
5858         struct qeth_ipa_caps caps;
5859         int rc;
5860
5861         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5862                                        IPA_CMD_ASS_START, 0, prot);
5863         if (!iob)
5864                 return -ENOMEM;
5865
5866         rc = qeth_send_ipa_cmd(card, iob, qeth_start_tso_cb, &tso_data);
5867         if (rc)
5868                 return rc;
5869
5870         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
5871                 qeth_set_tso_off(card, prot);
5872                 return -EOPNOTSUPP;
5873         }
5874
5875         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
5876                                        IPA_CMD_ASS_ENABLE,
5877                                        SETASS_DATA_SIZEOF(caps), prot);
5878         if (!iob) {
5879                 qeth_set_tso_off(card, prot);
5880                 return -ENOMEM;
5881         }
5882
5883         /* enable TSO capability */
5884         __ipa_cmd(iob)->data.setassparms.data.caps.enabled =
5885                 QETH_IPA_LARGE_SEND_TCP;
5886         rc = qeth_send_ipa_cmd(card, iob, qeth_setassparms_get_caps_cb, &caps);
5887         if (rc) {
5888                 qeth_set_tso_off(card, prot);
5889                 return rc;
5890         }
5891
5892         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
5893             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
5894                 qeth_set_tso_off(card, prot);
5895                 return -EOPNOTSUPP;
5896         }
5897
5898         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
5899                  tso_data.mss);
5900         return 0;
5901 }
5902
5903 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
5904                             enum qeth_prot_versions prot)
5905 {
5906         return on ? qeth_set_tso_on(card, prot) : qeth_set_tso_off(card, prot);
5907 }
5908
5909 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
5910 {
5911         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
5912         int rc_ipv6;
5913
5914         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
5915                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
5916                                             QETH_PROT_IPV4);
5917         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
5918                 /* no/one Offload Assist available, so the rc is trivial */
5919                 return rc_ipv4;
5920
5921         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
5922                                     QETH_PROT_IPV6);
5923
5924         if (on)
5925                 /* enable: success if any Assist is active */
5926                 return (rc_ipv6) ? rc_ipv4 : 0;
5927
5928         /* disable: failure if any Assist is still active */
5929         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
5930 }
5931
5932 /**
5933  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
5934  * @dev:        a net_device
5935  */
5936 void qeth_enable_hw_features(struct net_device *dev)
5937 {
5938         struct qeth_card *card = dev->ml_priv;
5939         netdev_features_t features;
5940
5941         features = dev->features;
5942         /* force-off any feature that might need an IPA sequence.
5943          * netdev_update_features() will restart them.
5944          */
5945         dev->features &= ~dev->hw_features;
5946         /* toggle VLAN filter, so that VIDs are re-programmed: */
5947         if (IS_LAYER2(card) && IS_VM_NIC(card)) {
5948                 dev->features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
5949                 dev->wanted_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
5950         }
5951         netdev_update_features(dev);
5952         if (features != dev->features)
5953                 dev_warn(&card->gdev->dev,
5954                          "Device recovery failed to restore all offload features\n");
5955 }
5956 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
5957
5958 int qeth_set_features(struct net_device *dev, netdev_features_t features)
5959 {
5960         struct qeth_card *card = dev->ml_priv;
5961         netdev_features_t changed = dev->features ^ features;
5962         int rc = 0;
5963
5964         QETH_CARD_TEXT(card, 2, "setfeat");
5965         QETH_CARD_HEX(card, 2, &features, sizeof(features));
5966
5967         if ((changed & NETIF_F_IP_CSUM)) {
5968                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
5969                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
5970                 if (rc)
5971                         changed ^= NETIF_F_IP_CSUM;
5972         }
5973         if (changed & NETIF_F_IPV6_CSUM) {
5974                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
5975                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
5976                 if (rc)
5977                         changed ^= NETIF_F_IPV6_CSUM;
5978         }
5979         if (changed & NETIF_F_RXCSUM) {
5980                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
5981                 if (rc)
5982                         changed ^= NETIF_F_RXCSUM;
5983         }
5984         if (changed & NETIF_F_TSO) {
5985                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
5986                                       QETH_PROT_IPV4);
5987                 if (rc)
5988                         changed ^= NETIF_F_TSO;
5989         }
5990         if (changed & NETIF_F_TSO6) {
5991                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
5992                                       QETH_PROT_IPV6);
5993                 if (rc)
5994                         changed ^= NETIF_F_TSO6;
5995         }
5996
5997         /* everything changed successfully? */
5998         if ((dev->features ^ features) == changed)
5999                 return 0;
6000         /* something went wrong. save changed features and return error */
6001         dev->features ^= changed;
6002         return -EIO;
6003 }
6004 EXPORT_SYMBOL_GPL(qeth_set_features);
6005
6006 netdev_features_t qeth_fix_features(struct net_device *dev,
6007                                     netdev_features_t features)
6008 {
6009         struct qeth_card *card = dev->ml_priv;
6010
6011         QETH_CARD_TEXT(card, 2, "fixfeat");
6012         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6013                 features &= ~NETIF_F_IP_CSUM;
6014         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6015                 features &= ~NETIF_F_IPV6_CSUM;
6016         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6017             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6018                 features &= ~NETIF_F_RXCSUM;
6019         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6020                 features &= ~NETIF_F_TSO;
6021         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6022                 features &= ~NETIF_F_TSO6;
6023
6024         QETH_CARD_HEX(card, 2, &features, sizeof(features));
6025         return features;
6026 }
6027 EXPORT_SYMBOL_GPL(qeth_fix_features);
6028
6029 netdev_features_t qeth_features_check(struct sk_buff *skb,
6030                                       struct net_device *dev,
6031                                       netdev_features_t features)
6032 {
6033         /* GSO segmentation builds skbs with
6034          *      a (small) linear part for the headers, and
6035          *      page frags for the data.
6036          * Compared to a linear skb, the header-only part consumes an
6037          * additional buffer element. This reduces buffer utilization, and
6038          * hurts throughput. So compress small segments into one element.
6039          */
6040         if (netif_needs_gso(skb, features)) {
6041                 /* match skb_segment(): */
6042                 unsigned int doffset = skb->data - skb_mac_header(skb);
6043                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6044                 unsigned int hroom = skb_headroom(skb);
6045
6046                 /* linearize only if resulting skb allocations are order-0: */
6047                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6048                         features &= ~NETIF_F_SG;
6049         }
6050
6051         return vlan_features_check(skb, features);
6052 }
6053 EXPORT_SYMBOL_GPL(qeth_features_check);
6054
6055 void qeth_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
6056 {
6057         struct qeth_card *card = dev->ml_priv;
6058         struct qeth_qdio_out_q *queue;
6059         unsigned int i;
6060
6061         QETH_CARD_TEXT(card, 5, "getstat");
6062
6063         stats->rx_packets = card->stats.rx_packets;
6064         stats->rx_bytes = card->stats.rx_bytes;
6065         stats->rx_errors = card->stats.rx_errors;
6066         stats->rx_dropped = card->stats.rx_dropped;
6067         stats->multicast = card->stats.rx_multicast;
6068
6069         for (i = 0; i < card->qdio.no_out_queues; i++) {
6070                 queue = card->qdio.out_qs[i];
6071
6072                 stats->tx_packets += queue->stats.tx_packets;
6073                 stats->tx_bytes += queue->stats.tx_bytes;
6074                 stats->tx_errors += queue->stats.tx_errors;
6075                 stats->tx_dropped += queue->stats.tx_dropped;
6076         }
6077 }
6078 EXPORT_SYMBOL_GPL(qeth_get_stats64);
6079
6080 u16 qeth_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
6081                           u8 cast_type, struct net_device *sb_dev)
6082 {
6083         if (cast_type != RTN_UNICAST)
6084                 return QETH_IQD_MCAST_TXQ;
6085         return QETH_IQD_MIN_UCAST_TXQ;
6086 }
6087 EXPORT_SYMBOL_GPL(qeth_iqd_select_queue);
6088
6089 int qeth_open(struct net_device *dev)
6090 {
6091         struct qeth_card *card = dev->ml_priv;
6092
6093         QETH_CARD_TEXT(card, 4, "qethopen");
6094
6095         if (qdio_stop_irq(CARD_DDEV(card), 0) < 0)
6096                 return -EIO;
6097
6098         card->data.state = CH_STATE_UP;
6099         netif_tx_start_all_queues(dev);
6100
6101         napi_enable(&card->napi);
6102         local_bh_disable();
6103         napi_schedule(&card->napi);
6104         /* kick-start the NAPI softirq: */
6105         local_bh_enable();
6106         return 0;
6107 }
6108 EXPORT_SYMBOL_GPL(qeth_open);
6109
6110 int qeth_stop(struct net_device *dev)
6111 {
6112         struct qeth_card *card = dev->ml_priv;
6113
6114         QETH_CARD_TEXT(card, 4, "qethstop");
6115         netif_tx_disable(dev);
6116         napi_disable(&card->napi);
6117         return 0;
6118 }
6119 EXPORT_SYMBOL_GPL(qeth_stop);
6120
6121 static int __init qeth_core_init(void)
6122 {
6123         int rc;
6124
6125         pr_info("loading core functions\n");
6126
6127         rc = qeth_register_dbf_views();
6128         if (rc)
6129                 goto dbf_err;
6130         qeth_core_root_dev = root_device_register("qeth");
6131         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6132         if (rc)
6133                 goto register_err;
6134         qeth_core_header_cache =
6135                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6136                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6137                                   0, NULL);
6138         if (!qeth_core_header_cache) {
6139                 rc = -ENOMEM;
6140                 goto slab_err;
6141         }
6142         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6143                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6144         if (!qeth_qdio_outbuf_cache) {
6145                 rc = -ENOMEM;
6146                 goto cqslab_err;
6147         }
6148         rc = ccw_driver_register(&qeth_ccw_driver);
6149         if (rc)
6150                 goto ccw_err;
6151         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6152         if (rc)
6153                 goto ccwgroup_err;
6154
6155         return 0;
6156
6157 ccwgroup_err:
6158         ccw_driver_unregister(&qeth_ccw_driver);
6159 ccw_err:
6160         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6161 cqslab_err:
6162         kmem_cache_destroy(qeth_core_header_cache);
6163 slab_err:
6164         root_device_unregister(qeth_core_root_dev);
6165 register_err:
6166         qeth_unregister_dbf_views();
6167 dbf_err:
6168         pr_err("Initializing the qeth device driver failed\n");
6169         return rc;
6170 }
6171
6172 static void __exit qeth_core_exit(void)
6173 {
6174         qeth_clear_dbf_list();
6175         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6176         ccw_driver_unregister(&qeth_ccw_driver);
6177         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6178         kmem_cache_destroy(qeth_core_header_cache);
6179         root_device_unregister(qeth_core_root_dev);
6180         qeth_unregister_dbf_views();
6181         pr_info("core functions removed\n");
6182 }
6183
6184 module_init(qeth_core_init);
6185 module_exit(qeth_core_exit);
6186 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6187 MODULE_DESCRIPTION("qeth core functions");
6188 MODULE_LICENSE("GPL");