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/kthread.h>
  24 #include <linux/slab.h>
  25 #include <linux/if_vlan.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/netdev_features.h>
  28 #include <linux/skbuff.h>
  29 #include <linux/vmalloc.h>
  30
  31 #include <net/iucv/af_iucv.h>
  32 #include <net/dsfield.h>
  33
  34 #include <asm/ebcdic.h>
  35 #include <asm/chpid.h>
  36 #include <asm/io.h>
  37 #include <asm/sysinfo.h>
  38 #include <asm/diag.h>
  39 #include <asm/cio.h>
  40 #include <asm/ccwdev.h>
  41 #include <asm/cpcmd.h>
  42
  43 #include "qeth_core.h"
  44
  45 struct qeth_dbf_info qeth_dbf[QETH_DBF_INFOS] = {
  46         /* define dbf - Name, Pages, Areas, Maxlen, Level, View, Handle */
  47         /*                   N  P  A    M  L  V                      H  */
  48         [QETH_DBF_SETUP] = {"qeth_setup",
  49                                 8, 1,   8, 5, &debug_hex_ascii_view, NULL},
  50         [QETH_DBF_MSG]   = {"qeth_msg", 8, 1, 11 * sizeof(long), 3,
  51                             &debug_sprintf_view, NULL},
  52         [QETH_DBF_CTRL]  = {"qeth_control",
  53                 8, 1, QETH_DBF_CTRL_LEN, 5, &debug_hex_ascii_view, NULL},
  54 };
  55 EXPORT_SYMBOL_GPL(qeth_dbf);
  56
  57 struct qeth_card_list_struct qeth_core_card_list;
  58 EXPORT_SYMBOL_GPL(qeth_core_card_list);
  59 struct kmem_cache *qeth_core_header_cache;
  60 EXPORT_SYMBOL_GPL(qeth_core_header_cache);
  61 static struct kmem_cache *qeth_qdio_outbuf_cache;
  62
  63 static struct device *qeth_core_root_dev;
  64 static struct lock_class_key qdio_out_skb_queue_key;
  65
  66 static void qeth_send_control_data_cb(struct qeth_card *card,
  67                                       struct qeth_channel *channel,
  68                                       struct qeth_cmd_buffer *iob);
  69 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *);
  70 static void qeth_free_buffer_pool(struct qeth_card *);
  71 static int qeth_qdio_establish(struct qeth_card *);
  72 static void qeth_free_qdio_buffers(struct qeth_card *);
  73 static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
  74                 struct qeth_qdio_out_buffer *buf,
  75                 enum iucv_tx_notify notification);
  76 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf);
  77 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
  78
  79 struct workqueue_struct *qeth_wq;
  80 EXPORT_SYMBOL_GPL(qeth_wq);
  81
  82 int qeth_card_hw_is_reachable(struct qeth_card *card)
  83 {
  84         return (card->state == CARD_STATE_SOFTSETUP) ||
  85                 (card->state == CARD_STATE_UP);
  86 }
  87 EXPORT_SYMBOL_GPL(qeth_card_hw_is_reachable);
  88
  89 static void qeth_close_dev_handler(struct work_struct *work)
  90 {
  91         struct qeth_card *card;
  92
  93         card = container_of(work, struct qeth_card, close_dev_work);
  94         QETH_CARD_TEXT(card, 2, "cldevhdl");
  95         rtnl_lock();
  96         dev_close(card->dev);
  97         rtnl_unlock();
  98         ccwgroup_set_offline(card->gdev);
  99 }
 100
 101 void qeth_close_dev(struct qeth_card *card)
 102 {
 103         QETH_CARD_TEXT(card, 2, "cldevsubm");
 104         queue_work(qeth_wq, &card->close_dev_work);
 105 }
 106 EXPORT_SYMBOL_GPL(qeth_close_dev);
 107
 108 static const char *qeth_get_cardname(struct qeth_card *card)
 109 {
 110         if (card->info.guestlan) {
 111                 switch (card->info.type) {
 112                 case QETH_CARD_TYPE_OSD:
 113                         return " Virtual NIC QDIO";
 114                 case QETH_CARD_TYPE_IQD:
 115                         return " Virtual NIC Hiper";
 116                 case QETH_CARD_TYPE_OSM:
 117                         return " Virtual NIC QDIO - OSM";
 118                 case QETH_CARD_TYPE_OSX:
 119                         return " Virtual NIC QDIO - OSX";
 120                 default:
 121                         return " unknown";
 122                 }
 123         } else {
 124                 switch (card->info.type) {
 125                 case QETH_CARD_TYPE_OSD:
 126                         return " OSD Express";
 127                 case QETH_CARD_TYPE_IQD:
 128                         return " HiperSockets";
 129                 case QETH_CARD_TYPE_OSN:
 130                         return " OSN QDIO";
 131                 case QETH_CARD_TYPE_OSM:
 132                         return " OSM QDIO";
 133                 case QETH_CARD_TYPE_OSX:
 134                         return " OSX QDIO";
 135                 default:
 136                         return " unknown";
 137                 }
 138         }
 139         return " n/a";
 140 }
 141
 142 /* max length to be returned: 14 */
 143 const char *qeth_get_cardname_short(struct qeth_card *card)
 144 {
 145         if (card->info.guestlan) {
 146                 switch (card->info.type) {
 147                 case QETH_CARD_TYPE_OSD:
 148                         return "Virt.NIC QDIO";
 149                 case QETH_CARD_TYPE_IQD:
 150                         return "Virt.NIC Hiper";
 151                 case QETH_CARD_TYPE_OSM:
 152                         return "Virt.NIC OSM";
 153                 case QETH_CARD_TYPE_OSX:
 154                         return "Virt.NIC OSX";
 155                 default:
 156                         return "unknown";
 157                 }
 158         } else {
 159                 switch (card->info.type) {
 160                 case QETH_CARD_TYPE_OSD:
 161                         switch (card->info.link_type) {
 162                         case QETH_LINK_TYPE_FAST_ETH:
 163                                 return "OSD_100";
 164                         case QETH_LINK_TYPE_HSTR:
 165                                 return "HSTR";
 166                         case QETH_LINK_TYPE_GBIT_ETH:
 167                                 return "OSD_1000";
 168                         case QETH_LINK_TYPE_10GBIT_ETH:
 169                                 return "OSD_10GIG";
 170                         case QETH_LINK_TYPE_LANE_ETH100:
 171                                 return "OSD_FE_LANE";
 172                         case QETH_LINK_TYPE_LANE_TR:
 173                                 return "OSD_TR_LANE";
 174                         case QETH_LINK_TYPE_LANE_ETH1000:
 175                                 return "OSD_GbE_LANE";
 176                         case QETH_LINK_TYPE_LANE:
 177                                 return "OSD_ATM_LANE";
 178                         default:
 179                                 return "OSD_Express";
 180                         }
 181                 case QETH_CARD_TYPE_IQD:
 182                         return "HiperSockets";
 183                 case QETH_CARD_TYPE_OSN:
 184                         return "OSN";
 185                 case QETH_CARD_TYPE_OSM:
 186                         return "OSM_1000";
 187                 case QETH_CARD_TYPE_OSX:
 188                         return "OSX_10GIG";
 189                 default:
 190                         return "unknown";
 191                 }
 192         }
 193         return "n/a";
 194 }
 195
 196 void qeth_set_recovery_task(struct qeth_card *card)
 197 {
 198         card->recovery_task = current;
 199 }
 200 EXPORT_SYMBOL_GPL(qeth_set_recovery_task);
 201
 202 void qeth_clear_recovery_task(struct qeth_card *card)
 203 {
 204         card->recovery_task = NULL;
 205 }
 206 EXPORT_SYMBOL_GPL(qeth_clear_recovery_task);
 207
 208 static bool qeth_is_recovery_task(const struct qeth_card *card)
 209 {
 210         return card->recovery_task == current;
 211 }
 212
 213 void qeth_set_allowed_threads(struct qeth_card *card, unsigned long threads,
 214                          int clear_start_mask)
 215 {
 216         unsigned long flags;
 217
 218         spin_lock_irqsave(&card->thread_mask_lock, flags);
 219         card->thread_allowed_mask = threads;
 220         if (clear_start_mask)
 221                 card->thread_start_mask &= threads;
 222         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 223         wake_up(&card->wait_q);
 224 }
 225 EXPORT_SYMBOL_GPL(qeth_set_allowed_threads);
 226
 227 int qeth_threads_running(struct qeth_card *card, unsigned long threads)
 228 {
 229         unsigned long flags;
 230         int rc = 0;
 231
 232         spin_lock_irqsave(&card->thread_mask_lock, flags);
 233         rc = (card->thread_running_mask & threads);
 234         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 235         return rc;
 236 }
 237 EXPORT_SYMBOL_GPL(qeth_threads_running);
 238
 239 int qeth_wait_for_threads(struct qeth_card *card, unsigned long threads)
 240 {
 241         if (qeth_is_recovery_task(card))
 242                 return 0;
 243         return wait_event_interruptible(card->wait_q,
 244                         qeth_threads_running(card, threads) == 0);
 245 }
 246 EXPORT_SYMBOL_GPL(qeth_wait_for_threads);
 247
 248 void qeth_clear_working_pool_list(struct qeth_card *card)
 249 {
 250         struct qeth_buffer_pool_entry *pool_entry, *tmp;
 251
 252         QETH_CARD_TEXT(card, 5, "clwrklst");
 253         list_for_each_entry_safe(pool_entry, tmp,
 254                             &card->qdio.in_buf_pool.entry_list, list){
 255                         list_del(&pool_entry->list);
 256         }
 257 }
 258 EXPORT_SYMBOL_GPL(qeth_clear_working_pool_list);
 259
 260 static int qeth_alloc_buffer_pool(struct qeth_card *card)
 261 {
 262         struct qeth_buffer_pool_entry *pool_entry;
 263         void *ptr;
 264         int i, j;
 265
 266         QETH_CARD_TEXT(card, 5, "alocpool");
 267         for (i = 0; i < card->qdio.init_pool.buf_count; ++i) {
 268                 pool_entry = kzalloc(sizeof(*pool_entry), GFP_KERNEL);
 269                 if (!pool_entry) {
 270                         qeth_free_buffer_pool(card);
 271                         return -ENOMEM;
 272                 }
 273                 for (j = 0; j < QETH_MAX_BUFFER_ELEMENTS(card); ++j) {
 274                         ptr = (void *) __get_free_page(GFP_KERNEL);
 275                         if (!ptr) {
 276                                 while (j > 0)
 277                                         free_page((unsigned long)
 278                                                   pool_entry->elements[--j]);
 279                                 kfree(pool_entry);
 280                                 qeth_free_buffer_pool(card);
 281                                 return -ENOMEM;
 282                         }
 283                         pool_entry->elements[j] = ptr;
 284                 }
 285                 list_add(&pool_entry->init_list,
 286                          &card->qdio.init_pool.entry_list);
 287         }
 288         return 0;
 289 }
 290
 291 int qeth_realloc_buffer_pool(struct qeth_card *card, int bufcnt)
 292 {
 293         QETH_CARD_TEXT(card, 2, "realcbp");
 294
 295         if ((card->state != CARD_STATE_DOWN) &&
 296             (card->state != CARD_STATE_RECOVER))
 297                 return -EPERM;
 298
 299         /* TODO: steel/add buffers from/to a running card's buffer pool (?) */
 300         qeth_clear_working_pool_list(card);
 301         qeth_free_buffer_pool(card);
 302         card->qdio.in_buf_pool.buf_count = bufcnt;
 303         card->qdio.init_pool.buf_count = bufcnt;
 304         return qeth_alloc_buffer_pool(card);
 305 }
 306 EXPORT_SYMBOL_GPL(qeth_realloc_buffer_pool);
 307
 308 static void qeth_free_qdio_queue(struct qeth_qdio_q *q)
 309 {
 310         if (!q)
 311                 return;
 312
 313         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
 314         kfree(q);
 315 }
 316
 317 static struct qeth_qdio_q *qeth_alloc_qdio_queue(void)
 318 {
 319         struct qeth_qdio_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
 320         int i;
 321
 322         if (!q)
 323                 return NULL;
 324
 325         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
 326                 kfree(q);
 327                 return NULL;
 328         }
 329
 330         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i)
 331                 q->bufs[i].buffer = q->qdio_bufs[i];
 332
 333         QETH_DBF_HEX(SETUP, 2, &q, sizeof(void *));
 334         return q;
 335 }
 336
 337 static int qeth_cq_init(struct qeth_card *card)
 338 {
 339         int rc;
 340
 341         if (card->options.cq == QETH_CQ_ENABLED) {
 342                 QETH_DBF_TEXT(SETUP, 2, "cqinit");
 343                 qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
 344                                    QDIO_MAX_BUFFERS_PER_Q);
 345                 card->qdio.c_q->next_buf_to_init = 127;
 346                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
 347                              card->qdio.no_in_queues - 1, 0,
 348                              127);
 349                 if (rc) {
 350                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 351                         goto out;
 352                 }
 353         }
 354         rc = 0;
 355 out:
 356         return rc;
 357 }
 358
 359 static int qeth_alloc_cq(struct qeth_card *card)
 360 {
 361         int rc;
 362
 363         if (card->options.cq == QETH_CQ_ENABLED) {
 364                 int i;
 365                 struct qdio_outbuf_state *outbuf_states;
 366
 367                 QETH_DBF_TEXT(SETUP, 2, "cqon");
 368                 card->qdio.c_q = qeth_alloc_qdio_queue();
 369                 if (!card->qdio.c_q) {
 370                         rc = -1;
 371                         goto kmsg_out;
 372                 }
 373                 card->qdio.no_in_queues = 2;
 374                 card->qdio.out_bufstates =
 375                         kcalloc(card->qdio.no_out_queues *
 376                                         QDIO_MAX_BUFFERS_PER_Q,
 377                                 sizeof(struct qdio_outbuf_state),
 378                                 GFP_KERNEL);
 379                 outbuf_states = card->qdio.out_bufstates;
 380                 if (outbuf_states == NULL) {
 381                         rc = -1;
 382                         goto free_cq_out;
 383                 }
 384                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
 385                         card->qdio.out_qs[i]->bufstates = outbuf_states;
 386                         outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
 387                 }
 388         } else {
 389                 QETH_DBF_TEXT(SETUP, 2, "nocq");
 390                 card->qdio.c_q = NULL;
 391                 card->qdio.no_in_queues = 1;
 392         }
 393         QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
 394         rc = 0;
 395 out:
 396         return rc;
 397 free_cq_out:
 398         qeth_free_qdio_queue(card->qdio.c_q);
 399         card->qdio.c_q = NULL;
 400 kmsg_out:
 401         dev_err(&card->gdev->dev, "Failed to create completion queue\n");
 402         goto out;
 403 }
 404
 405 static void qeth_free_cq(struct qeth_card *card)
 406 {
 407         if (card->qdio.c_q) {
 408                 --card->qdio.no_in_queues;
 409                 qeth_free_qdio_queue(card->qdio.c_q);
 410                 card->qdio.c_q = NULL;
 411         }
 412         kfree(card->qdio.out_bufstates);
 413         card->qdio.out_bufstates = NULL;
 414 }
 415
 416 static enum iucv_tx_notify qeth_compute_cq_notification(int sbalf15,
 417                                                         int delayed)
 418 {
 419         enum iucv_tx_notify n;
 420
 421         switch (sbalf15) {
 422         case 0:
 423                 n = delayed ? TX_NOTIFY_DELAYED_OK : TX_NOTIFY_OK;
 424                 break;
 425         case 4:
 426         case 16:
 427         case 17:
 428         case 18:
 429                 n = delayed ? TX_NOTIFY_DELAYED_UNREACHABLE :
 430                         TX_NOTIFY_UNREACHABLE;
 431                 break;
 432         default:
 433                 n = delayed ? TX_NOTIFY_DELAYED_GENERALERROR :
 434                         TX_NOTIFY_GENERALERROR;
 435                 break;
 436         }
 437
 438         return n;
 439 }
 440
 441 static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
 442                                          int forced_cleanup)
 443 {
 444         if (q->card->options.cq != QETH_CQ_ENABLED)
 445                 return;
 446
 447         if (q->bufs[bidx]->next_pending != NULL) {
 448                 struct qeth_qdio_out_buffer *head = q->bufs[bidx];
 449                 struct qeth_qdio_out_buffer *c = q->bufs[bidx]->next_pending;
 450
 451                 while (c) {
 452                         if (forced_cleanup ||
 453                             atomic_read(&c->state) ==
 454                               QETH_QDIO_BUF_HANDLED_DELAYED) {
 455                                 struct qeth_qdio_out_buffer *f = c;
 456                                 QETH_CARD_TEXT(f->q->card, 5, "fp");
 457                                 QETH_CARD_TEXT_(f->q->card, 5, "%lx", (long) f);
 458                                 /* release here to avoid interleaving between
 459                                    outbound tasklet and inbound tasklet
 460                                    regarding notifications and lifecycle */
 461                                 qeth_release_skbs(c);
 462
 463                                 c = f->next_pending;
 464                                 WARN_ON_ONCE(head->next_pending != f);
 465                                 head->next_pending = c;
 466                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
 467                         } else {
 468                                 head = c;
 469                                 c = c->next_pending;
 470                         }
 471
 472                 }
 473         }
 474         if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
 475                                         QETH_QDIO_BUF_HANDLED_DELAYED)) {
 476                 /* for recovery situations */
 477                 qeth_init_qdio_out_buf(q, bidx);
 478                 QETH_CARD_TEXT(q->card, 2, "clprecov");
 479         }
 480 }
 481
 482
 483 static void qeth_qdio_handle_aob(struct qeth_card *card,
 484                                  unsigned long phys_aob_addr)
 485 {
 486         struct qaob *aob;
 487         struct qeth_qdio_out_buffer *buffer;
 488         enum iucv_tx_notify notification;
 489         unsigned int i;
 490
 491         aob = (struct qaob *) phys_to_virt(phys_aob_addr);
 492         QETH_CARD_TEXT(card, 5, "haob");
 493         QETH_CARD_TEXT_(card, 5, "%lx", phys_aob_addr);
 494         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 495         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 496
 497         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
 498                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
 499                 notification = TX_NOTIFY_OK;
 500         } else {
 501                 WARN_ON_ONCE(atomic_read(&buffer->state) !=
 502                                                         QETH_QDIO_BUF_PENDING);
 503                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
 504                 notification = TX_NOTIFY_DELAYED_OK;
 505         }
 506
 507         if (aob->aorc != 0)  {
 508                 QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 509                 notification = qeth_compute_cq_notification(aob->aorc, 1);
 510         }
 511         qeth_notify_skbs(buffer->q, buffer, notification);
 512
 513         /* Free dangling allocations. The attached skbs are handled by
 514          * qeth_cleanup_handled_pending().
 515          */
 516         for (i = 0;
 517              i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
 518              i++) {
 519                 if (aob->sba[i] && buffer->is_header[i])
 520                         kmem_cache_free(qeth_core_header_cache,
 521                                         (void *) aob->sba[i]);
 522         }
 523         atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 524
 525         qdio_release_aob(aob);
 526 }
 527
 528 static inline int qeth_is_cq(struct qeth_card *card, unsigned int queue)
 529 {
 530         return card->options.cq == QETH_CQ_ENABLED &&
 531             card->qdio.c_q != NULL &&
 532             queue != 0 &&
 533             queue == card->qdio.no_in_queues - 1;
 534 }
 535
 536 static void qeth_setup_ccw(struct ccw1 *ccw, u8 cmd_code, u32 len, void *data)
 537 {
 538         ccw->cmd_code = cmd_code;
 539         ccw->flags = CCW_FLAG_SLI;
 540         ccw->count = len;
 541         ccw->cda = (__u32) __pa(data);
 542 }
 543
 544 static int __qeth_issue_next_read(struct qeth_card *card)
 545 {
 546         struct qeth_channel *channel = &card->read;
 547         struct qeth_cmd_buffer *iob;
 548         int rc;
 549
 550         QETH_CARD_TEXT(card, 5, "issnxrd");
 551         if (channel->state != CH_STATE_UP)
 552                 return -EIO;
 553         iob = qeth_get_buffer(channel);
 554         if (!iob) {
 555                 dev_warn(&card->gdev->dev, "The qeth device driver "
 556                         "failed to recover an error on the device\n");
 557                 QETH_DBF_MESSAGE(2, "issue_next_read on device %x failed: no iob available\n",
 558                                  CARD_DEVID(card));
 559                 return -ENOMEM;
 560         }
 561         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
 562         QETH_CARD_TEXT(card, 6, "noirqpnd");
 563         rc = ccw_device_start(channel->ccwdev, channel->ccw,
 564                               (addr_t) iob, 0, 0);
 565         if (rc) {
 566                 QETH_DBF_MESSAGE(2, "error %i on device %x when starting next read ccw!\n",
 567                                  rc, CARD_DEVID(card));
 568                 atomic_set(&channel->irq_pending, 0);
 569                 card->read_or_write_problem = 1;
 570                 qeth_schedule_recovery(card);
 571                 wake_up(&card->wait_q);
 572         }
 573         return rc;
 574 }
 575
 576 static int qeth_issue_next_read(struct qeth_card *card)
 577 {
 578         int ret;
 579
 580         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 581         ret = __qeth_issue_next_read(card);
 582         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 583
 584         return ret;
 585 }
 586
 587 static struct qeth_reply *qeth_alloc_reply(struct qeth_card *card)
 588 {
 589         struct qeth_reply *reply;
 590
 591         reply = kzalloc(sizeof(struct qeth_reply), GFP_ATOMIC);
 592         if (reply) {
 593                 refcount_set(&reply->refcnt, 1);
 594                 atomic_set(&reply->received, 0);
 595         }
 596         return reply;
 597 }
 598
 599 static void qeth_get_reply(struct qeth_reply *reply)
 600 {
 601         refcount_inc(&reply->refcnt);
 602 }
 603
 604 static void qeth_put_reply(struct qeth_reply *reply)
 605 {
 606         if (refcount_dec_and_test(&reply->refcnt))
 607                 kfree(reply);
 608 }
 609
 610 static void qeth_issue_ipa_msg(struct qeth_ipa_cmd *cmd, int rc,
 611                 struct qeth_card *card)
 612 {
 613         const char *ipa_name;
 614         int com = cmd->hdr.command;
 615         ipa_name = qeth_get_ipa_cmd_name(com);
 616
 617         if (rc)
 618                 QETH_DBF_MESSAGE(2, "IPA: %s(%#x) for device %x returned %#x \"%s\"\n",
 619                                  ipa_name, com, CARD_DEVID(card), rc,
 620                                  qeth_get_ipa_msg(rc));
 621         else
 622                 QETH_DBF_MESSAGE(5, "IPA: %s(%#x) for device %x succeeded\n",
 623                                  ipa_name, com, CARD_DEVID(card));
 624 }
 625
 626 static struct qeth_ipa_cmd *qeth_check_ipa_data(struct qeth_card *card,
 627                                                 struct qeth_ipa_cmd *cmd)
 628 {
 629         QETH_CARD_TEXT(card, 5, "chkipad");
 630
 631         if (IS_IPA_REPLY(cmd)) {
 632                 if (cmd->hdr.command != IPA_CMD_SETCCID &&
 633                     cmd->hdr.command != IPA_CMD_DELCCID &&
 634                     cmd->hdr.command != IPA_CMD_MODCCID &&
 635                     cmd->hdr.command != IPA_CMD_SET_DIAG_ASS)
 636                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 637                 return cmd;
 638         }
 639
 640         /* handle unsolicited event: */
 641         switch (cmd->hdr.command) {
 642         case IPA_CMD_STOPLAN:
 643                 if (cmd->hdr.return_code == IPA_RC_VEPA_TO_VEB_TRANSITION) {
 644                         dev_err(&card->gdev->dev,
 645                                 "Interface %s is down because the adjacent port is no longer in reflective relay mode\n",
 646                                 QETH_CARD_IFNAME(card));
 647                         qeth_close_dev(card);
 648                 } else {
 649                         dev_warn(&card->gdev->dev,
 650                                  "The link for interface %s on CHPID 0x%X failed\n",
 651                                  QETH_CARD_IFNAME(card), card->info.chpid);
 652                         qeth_issue_ipa_msg(cmd, cmd->hdr.return_code, card);
 653                         netif_carrier_off(card->dev);
 654                 }
 655                 return NULL;
 656         case IPA_CMD_STARTLAN:
 657                 dev_info(&card->gdev->dev,
 658                          "The link for %s on CHPID 0x%X has been restored\n",
 659                          QETH_CARD_IFNAME(card), card->info.chpid);
 660                 if (card->info.hwtrap)
 661                         card->info.hwtrap = 2;
 662                 qeth_schedule_recovery(card);
 663                 return NULL;
 664         case IPA_CMD_SETBRIDGEPORT_IQD:
 665         case IPA_CMD_SETBRIDGEPORT_OSA:
 666         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 667                 if (card->discipline->control_event_handler(card, cmd))
 668                         return cmd;
 669                 return NULL;
 670         case IPA_CMD_MODCCID:
 671                 return cmd;
 672         case IPA_CMD_REGISTER_LOCAL_ADDR:
 673                 QETH_CARD_TEXT(card, 3, "irla");
 674                 return NULL;
 675         case IPA_CMD_UNREGISTER_LOCAL_ADDR:
 676                 QETH_CARD_TEXT(card, 3, "urla");
 677                 return NULL;
 678         default:
 679                 QETH_DBF_MESSAGE(2, "Received data is IPA but not a reply!\n");
 680                 return cmd;
 681         }
 682 }
 683
 684 void qeth_clear_ipacmd_list(struct qeth_card *card)
 685 {
 686         struct qeth_reply *reply, *r;
 687         unsigned long flags;
 688
 689         QETH_CARD_TEXT(card, 4, "clipalst");
 690
 691         spin_lock_irqsave(&card->lock, flags);
 692         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 693                 qeth_get_reply(reply);
 694                 reply->rc = -EIO;
 695                 atomic_inc(&reply->received);
 696                 list_del_init(&reply->list);
 697                 wake_up(&reply->wait_q);
 698                 qeth_put_reply(reply);
 699         }
 700         spin_unlock_irqrestore(&card->lock, flags);
 701 }
 702 EXPORT_SYMBOL_GPL(qeth_clear_ipacmd_list);
 703
 704 static int qeth_check_idx_response(struct qeth_card *card,
 705         unsigned char *buffer)
 706 {
 707         if (!buffer)
 708                 return 0;
 709
 710         QETH_DBF_HEX(CTRL, 2, buffer, QETH_DBF_CTRL_LEN);
 711         if ((buffer[2] & 0xc0) == 0xc0) {
 712                 QETH_DBF_MESSAGE(2, "received an IDX TERMINATE with cause code %#04x\n",
 713                                  buffer[4]);
 714                 QETH_CARD_TEXT(card, 2, "ckidxres");
 715                 QETH_CARD_TEXT(card, 2, " idxterm");
 716                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
 717                 if (buffer[4] == 0xf6) {
 718                         dev_err(&card->gdev->dev,
 719                         "The qeth device is not configured "
 720                         "for the OSI layer required by z/VM\n");
 721                         return -EPERM;
 722                 }
 723                 return -EIO;
 724         }
 725         return 0;
 726 }
 727
 728 static struct qeth_cmd_buffer *__qeth_get_buffer(struct qeth_channel *channel)
 729 {
 730         __u8 index;
 731
 732         index = channel->io_buf_no;
 733         do {
 734                 if (channel->iob[index].state == BUF_STATE_FREE) {
 735                         channel->iob[index].state = BUF_STATE_LOCKED;
 736                         channel->io_buf_no = (channel->io_buf_no + 1) %
 737                                 QETH_CMD_BUFFER_NO;
 738                         memset(channel->iob[index].data, 0, QETH_BUFSIZE);
 739                         return channel->iob + index;
 740                 }
 741                 index = (index + 1) % QETH_CMD_BUFFER_NO;
 742         } while (index != channel->io_buf_no);
 743
 744         return NULL;
 745 }
 746
 747 void qeth_release_buffer(struct qeth_channel *channel,
 748                 struct qeth_cmd_buffer *iob)
 749 {
 750         unsigned long flags;
 751
 752         spin_lock_irqsave(&channel->iob_lock, flags);
 753         iob->state = BUF_STATE_FREE;
 754         iob->callback = qeth_send_control_data_cb;
 755         iob->rc = 0;
 756         spin_unlock_irqrestore(&channel->iob_lock, flags);
 757         wake_up(&channel->wait_q);
 758 }
 759 EXPORT_SYMBOL_GPL(qeth_release_buffer);
 760
 761 static void qeth_release_buffer_cb(struct qeth_card *card,
 762                                    struct qeth_channel *channel,
 763                                    struct qeth_cmd_buffer *iob)
 764 {
 765         qeth_release_buffer(channel, iob);
 766 }
 767
 768 static struct qeth_cmd_buffer *qeth_get_buffer(struct qeth_channel *channel)
 769 {
 770         struct qeth_cmd_buffer *buffer = NULL;
 771         unsigned long flags;
 772
 773         spin_lock_irqsave(&channel->iob_lock, flags);
 774         buffer = __qeth_get_buffer(channel);
 775         spin_unlock_irqrestore(&channel->iob_lock, flags);
 776         return buffer;
 777 }
 778
 779 struct qeth_cmd_buffer *qeth_wait_for_buffer(struct qeth_channel *channel)
 780 {
 781         struct qeth_cmd_buffer *buffer;
 782         wait_event(channel->wait_q,
 783                    ((buffer = qeth_get_buffer(channel)) != NULL));
 784         return buffer;
 785 }
 786 EXPORT_SYMBOL_GPL(qeth_wait_for_buffer);
 787
 788 void qeth_clear_cmd_buffers(struct qeth_channel *channel)
 789 {
 790         int cnt;
 791
 792         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
 793                 qeth_release_buffer(channel, &channel->iob[cnt]);
 794         channel->io_buf_no = 0;
 795 }
 796 EXPORT_SYMBOL_GPL(qeth_clear_cmd_buffers);
 797
 798 static void qeth_send_control_data_cb(struct qeth_card *card,
 799                                       struct qeth_channel *channel,
 800                                       struct qeth_cmd_buffer *iob)
 801 {
 802         struct qeth_ipa_cmd *cmd = NULL;
 803         struct qeth_reply *reply, *r;
 804         unsigned long flags;
 805         int keep_reply;
 806         int rc = 0;
 807
 808         QETH_CARD_TEXT(card, 4, "sndctlcb");
 809         rc = qeth_check_idx_response(card, iob->data);
 810         switch (rc) {
 811         case 0:
 812                 break;
 813         case -EIO:
 814                 qeth_clear_ipacmd_list(card);
 815                 qeth_schedule_recovery(card);
 816                 /* fall through */
 817         default:
 818                 goto out;
 819         }
 820
 821         if (IS_IPA(iob->data)) {
 822                 cmd = (struct qeth_ipa_cmd *) PDU_ENCAPSULATION(iob->data);
 823                 cmd = qeth_check_ipa_data(card, cmd);
 824                 if (!cmd)
 825                         goto out;
 826                 if (IS_OSN(card) && card->osn_info.assist_cb &&
 827                     cmd->hdr.command != IPA_CMD_STARTLAN) {
 828                         card->osn_info.assist_cb(card->dev, cmd);
 829                         goto out;
 830                 }
 831         } else {
 832                 /* non-IPA commands should only flow during initialization */
 833                 if (card->state != CARD_STATE_DOWN)
 834                         goto out;
 835         }
 836
 837         spin_lock_irqsave(&card->lock, flags);
 838         list_for_each_entry_safe(reply, r, &card->cmd_waiter_list, list) {
 839                 if ((reply->seqno == QETH_IDX_COMMAND_SEQNO) ||
 840                     ((cmd) && (reply->seqno == cmd->hdr.seqno))) {
 841                         qeth_get_reply(reply);
 842                         list_del_init(&reply->list);
 843                         spin_unlock_irqrestore(&card->lock, flags);
 844                         keep_reply = 0;
 845                         if (reply->callback != NULL) {
 846                                 if (cmd) {
 847                                         reply->offset = (__u16)((char *)cmd -
 848                                                         (char *)iob->data);
 849                                         keep_reply = reply->callback(card,
 850                                                         reply,
 851                                                         (unsigned long)cmd);
 852                                 } else
 853                                         keep_reply = reply->callback(card,
 854                                                         reply,
 855                                                         (unsigned long)iob);
 856                         }
 857                         if (cmd)
 858                                 reply->rc = (u16) cmd->hdr.return_code;
 859                         else if (iob->rc)
 860                                 reply->rc = iob->rc;
 861                         if (keep_reply) {
 862                                 spin_lock_irqsave(&card->lock, flags);
 863                                 list_add_tail(&reply->list,
 864                                               &card->cmd_waiter_list);
 865                                 spin_unlock_irqrestore(&card->lock, flags);
 866                         } else {
 867                                 atomic_inc(&reply->received);
 868                                 wake_up(&reply->wait_q);
 869                         }
 870                         qeth_put_reply(reply);
 871                         goto out;
 872                 }
 873         }
 874         spin_unlock_irqrestore(&card->lock, flags);
 875 out:
 876         memcpy(&card->seqno.pdu_hdr_ack,
 877                 QETH_PDU_HEADER_SEQ_NO(iob->data),
 878                 QETH_SEQ_NO_LENGTH);
 879         qeth_release_buffer(channel, iob);
 880 }
 881
 882 static int qeth_set_thread_start_bit(struct qeth_card *card,
 883                 unsigned long thread)
 884 {
 885         unsigned long flags;
 886
 887         spin_lock_irqsave(&card->thread_mask_lock, flags);
 888         if (!(card->thread_allowed_mask & thread) ||
 889               (card->thread_start_mask & thread)) {
 890                 spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 891                 return -EPERM;
 892         }
 893         card->thread_start_mask |= thread;
 894         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 895         return 0;
 896 }
 897
 898 void qeth_clear_thread_start_bit(struct qeth_card *card, unsigned long thread)
 899 {
 900         unsigned long flags;
 901
 902         spin_lock_irqsave(&card->thread_mask_lock, flags);
 903         card->thread_start_mask &= ~thread;
 904         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 905         wake_up(&card->wait_q);
 906 }
 907 EXPORT_SYMBOL_GPL(qeth_clear_thread_start_bit);
 908
 909 void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
 910 {
 911         unsigned long flags;
 912
 913         spin_lock_irqsave(&card->thread_mask_lock, flags);
 914         card->thread_running_mask &= ~thread;
 915         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 916         wake_up_all(&card->wait_q);
 917 }
 918 EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);
 919
 920 static int __qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 921 {
 922         unsigned long flags;
 923         int rc = 0;
 924
 925         spin_lock_irqsave(&card->thread_mask_lock, flags);
 926         if (card->thread_start_mask & thread) {
 927                 if ((card->thread_allowed_mask & thread) &&
 928                     !(card->thread_running_mask & thread)) {
 929                         rc = 1;
 930                         card->thread_start_mask &= ~thread;
 931                         card->thread_running_mask |= thread;
 932                 } else
 933                         rc = -EPERM;
 934         }
 935         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
 936         return rc;
 937 }
 938
 939 int qeth_do_run_thread(struct qeth_card *card, unsigned long thread)
 940 {
 941         int rc = 0;
 942
 943         wait_event(card->wait_q,
 944                    (rc = __qeth_do_run_thread(card, thread)) >= 0);
 945         return rc;
 946 }
 947 EXPORT_SYMBOL_GPL(qeth_do_run_thread);
 948
 949 void qeth_schedule_recovery(struct qeth_card *card)
 950 {
 951         QETH_CARD_TEXT(card, 2, "startrec");
 952         if (qeth_set_thread_start_bit(card, QETH_RECOVER_THREAD) == 0)
 953                 schedule_work(&card->kernel_thread_starter);
 954 }
 955 EXPORT_SYMBOL_GPL(qeth_schedule_recovery);
 956
 957 static int qeth_get_problem(struct qeth_card *card, struct ccw_device *cdev,
 958                             struct irb *irb)
 959 {
 960         int dstat, cstat;
 961         char *sense;
 962
 963         sense = (char *) irb->ecw;
 964         cstat = irb->scsw.cmd.cstat;
 965         dstat = irb->scsw.cmd.dstat;
 966
 967         if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
 968                      SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
 969                      SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
 970                 QETH_CARD_TEXT(card, 2, "CGENCHK");
 971                 dev_warn(&cdev->dev, "The qeth device driver "
 972                         "failed to recover an error on the device\n");
 973                 QETH_DBF_MESSAGE(2, "check on channel %x with dstat=%#x, cstat=%#x\n",
 974                                  CCW_DEVID(cdev), dstat, cstat);
 975                 print_hex_dump(KERN_WARNING, "qeth: irb ", DUMP_PREFIX_OFFSET,
 976                                 16, 1, irb, 64, 1);
 977                 return 1;
 978         }
 979
 980         if (dstat & DEV_STAT_UNIT_CHECK) {
 981                 if (sense[SENSE_RESETTING_EVENT_BYTE] &
 982                     SENSE_RESETTING_EVENT_FLAG) {
 983                         QETH_CARD_TEXT(card, 2, "REVIND");
 984                         return 1;
 985                 }
 986                 if (sense[SENSE_COMMAND_REJECT_BYTE] &
 987                     SENSE_COMMAND_REJECT_FLAG) {
 988                         QETH_CARD_TEXT(card, 2, "CMDREJi");
 989                         return 1;
 990                 }
 991                 if ((sense[2] == 0xaf) && (sense[3] == 0xfe)) {
 992                         QETH_CARD_TEXT(card, 2, "AFFE");
 993                         return 1;
 994                 }
 995                 if ((!sense[0]) && (!sense[1]) && (!sense[2]) && (!sense[3])) {
 996                         QETH_CARD_TEXT(card, 2, "ZEROSEN");
 997                         return 0;
 998                 }
 999                 QETH_CARD_TEXT(card, 2, "DGENCHK");
1000                         return 1;
1001         }
1002         return 0;
1003 }
1004
1005 static long qeth_check_irb_error(struct qeth_card *card,
1006                                  struct ccw_device *cdev, unsigned long intparm,
1007                                  struct irb *irb)
1008 {
1009         if (!IS_ERR(irb))
1010                 return 0;
1011
1012         switch (PTR_ERR(irb)) {
1013         case -EIO:
1014                 QETH_DBF_MESSAGE(2, "i/o-error on channel %x\n",
1015                                  CCW_DEVID(cdev));
1016                 QETH_CARD_TEXT(card, 2, "ckirberr");
1017                 QETH_CARD_TEXT_(card, 2, "  rc%d", -EIO);
1018                 break;
1019         case -ETIMEDOUT:
1020                 dev_warn(&cdev->dev, "A hardware operation timed out"
1021                         " on the device\n");
1022                 QETH_CARD_TEXT(card, 2, "ckirberr");
1023                 QETH_CARD_TEXT_(card, 2, "  rc%d", -ETIMEDOUT);
1024                 if (intparm == QETH_RCD_PARM) {
1025                         if (card->data.ccwdev == cdev) {
1026                                 card->data.state = CH_STATE_DOWN;
1027                                 wake_up(&card->wait_q);
1028                         }
1029                 }
1030                 break;
1031         default:
1032                 QETH_DBF_MESSAGE(2, "unknown error %ld on channel %x\n",
1033                                  PTR_ERR(irb), CCW_DEVID(cdev));
1034                 QETH_CARD_TEXT(card, 2, "ckirberr");
1035                 QETH_CARD_TEXT(card, 2, "  rc???");
1036         }
1037         return PTR_ERR(irb);
1038 }
1039
1040 static void qeth_irq(struct ccw_device *cdev, unsigned long intparm,
1041                 struct irb *irb)
1042 {
1043         int rc;
1044         int cstat, dstat;
1045         struct qeth_cmd_buffer *iob = NULL;
1046         struct ccwgroup_device *gdev;
1047         struct qeth_channel *channel;
1048         struct qeth_card *card;
1049
1050         /* while we hold the ccwdev lock, this stays valid: */
1051         gdev = dev_get_drvdata(&cdev->dev);
1052         card = dev_get_drvdata(&gdev->dev);
1053         if (!card)
1054                 return;
1055
1056         QETH_CARD_TEXT(card, 5, "irq");
1057
1058         if (card->read.ccwdev == cdev) {
1059                 channel = &card->read;
1060                 QETH_CARD_TEXT(card, 5, "read");
1061         } else if (card->write.ccwdev == cdev) {
1062                 channel = &card->write;
1063                 QETH_CARD_TEXT(card, 5, "write");
1064         } else {
1065                 channel = &card->data;
1066                 QETH_CARD_TEXT(card, 5, "data");
1067         }
1068
1069         if (qeth_intparm_is_iob(intparm))
1070                 iob = (struct qeth_cmd_buffer *) __va((addr_t)intparm);
1071
1072         if (qeth_check_irb_error(card, cdev, intparm, irb)) {
1073                 /* IO was terminated, free its resources. */
1074                 if (iob)
1075                         qeth_release_buffer(iob->channel, iob);
1076                 atomic_set(&channel->irq_pending, 0);
1077                 wake_up(&card->wait_q);
1078                 return;
1079         }
1080
1081         atomic_set(&channel->irq_pending, 0);
1082
1083         if (irb->scsw.cmd.fctl & (SCSW_FCTL_CLEAR_FUNC))
1084                 channel->state = CH_STATE_STOPPED;
1085
1086         if (irb->scsw.cmd.fctl & (SCSW_FCTL_HALT_FUNC))
1087                 channel->state = CH_STATE_HALTED;
1088
1089         /*let's wake up immediately on data channel*/
1090         if ((channel == &card->data) && (intparm != 0) &&
1091             (intparm != QETH_RCD_PARM))
1092                 goto out;
1093
1094         if (intparm == QETH_CLEAR_CHANNEL_PARM) {
1095                 QETH_CARD_TEXT(card, 6, "clrchpar");
1096                 /* we don't have to handle this further */
1097                 intparm = 0;
1098         }
1099         if (intparm == QETH_HALT_CHANNEL_PARM) {
1100                 QETH_CARD_TEXT(card, 6, "hltchpar");
1101                 /* we don't have to handle this further */
1102                 intparm = 0;
1103         }
1104
1105         cstat = irb->scsw.cmd.cstat;
1106         dstat = irb->scsw.cmd.dstat;
1107
1108         if ((dstat & DEV_STAT_UNIT_EXCEP) ||
1109             (dstat & DEV_STAT_UNIT_CHECK) ||
1110             (cstat)) {
1111                 if (irb->esw.esw0.erw.cons) {
1112                         dev_warn(&channel->ccwdev->dev,
1113                                 "The qeth device driver failed to recover "
1114                                 "an error on the device\n");
1115                         QETH_DBF_MESSAGE(2, "sense data available on channel %x: cstat %#X dstat %#X\n",
1116                                          CCW_DEVID(channel->ccwdev), cstat,
1117                                          dstat);
1118                         print_hex_dump(KERN_WARNING, "qeth: irb ",
1119                                 DUMP_PREFIX_OFFSET, 16, 1, irb, 32, 1);
1120                         print_hex_dump(KERN_WARNING, "qeth: sense data ",
1121                                 DUMP_PREFIX_OFFSET, 16, 1, irb->ecw, 32, 1);
1122                 }
1123                 if (intparm == QETH_RCD_PARM) {
1124                         channel->state = CH_STATE_DOWN;
1125                         goto out;
1126                 }
1127                 rc = qeth_get_problem(card, cdev, irb);
1128                 if (rc) {
1129                         card->read_or_write_problem = 1;
1130                         qeth_clear_ipacmd_list(card);
1131                         qeth_schedule_recovery(card);
1132                         goto out;
1133                 }
1134         }
1135
1136         if (intparm == QETH_RCD_PARM) {
1137                 channel->state = CH_STATE_RCD_DONE;
1138                 goto out;
1139         }
1140         if (channel == &card->data)
1141                 return;
1142         if (channel == &card->read &&
1143             channel->state == CH_STATE_UP)
1144                 __qeth_issue_next_read(card);
1145
1146         if (iob && iob->callback)
1147                 iob->callback(card, iob->channel, iob);
1148
1149 out:
1150         wake_up(&card->wait_q);
1151         return;
1152 }
1153
1154 static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
1155                 struct qeth_qdio_out_buffer *buf,
1156                 enum iucv_tx_notify notification)
1157 {
1158         struct sk_buff *skb;
1159
1160         skb_queue_walk(&buf->skb_list, skb) {
1161                 QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
1162                 QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
1163                 if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
1164                         iucv_sk(skb->sk)->sk_txnotify(skb, notification);
1165         }
1166 }
1167
1168 static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
1169 {
1170         /* release may never happen from within CQ tasklet scope */
1171         WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
1172
1173         if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
1174                 qeth_notify_skbs(buf->q, buf, TX_NOTIFY_GENERALERROR);
1175
1176         __skb_queue_purge(&buf->skb_list);
1177 }
1178
1179 static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
1180                                      struct qeth_qdio_out_buffer *buf)
1181 {
1182         int i;
1183
1184         /* is PCI flag set on buffer? */
1185         if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
1186                 atomic_dec(&queue->set_pci_flags_count);
1187
1188         qeth_release_skbs(buf);
1189
1190         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(queue->card); ++i) {
1191                 if (buf->buffer->element[i].addr && buf->is_header[i])
1192                         kmem_cache_free(qeth_core_header_cache,
1193                                 buf->buffer->element[i].addr);
1194                 buf->is_header[i] = 0;
1195         }
1196
1197         qeth_scrub_qdio_buffer(buf->buffer,
1198                                QETH_MAX_BUFFER_ELEMENTS(queue->card));
1199         buf->next_element_to_fill = 0;
1200         atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
1201 }
1202
1203 static void qeth_clear_outq_buffers(struct qeth_qdio_out_q *q, int free)
1204 {
1205         int j;
1206
1207         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
1208                 if (!q->bufs[j])
1209                         continue;
1210                 qeth_cleanup_handled_pending(q, j, 1);
1211                 qeth_clear_output_buffer(q, q->bufs[j]);
1212                 if (free) {
1213                         kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
1214                         q->bufs[j] = NULL;
1215                 }
1216         }
1217 }
1218
1219 void qeth_clear_qdio_buffers(struct qeth_card *card)
1220 {
1221         int i;
1222
1223         QETH_CARD_TEXT(card, 2, "clearqdbf");
1224         /* clear outbound buffers to free skbs */
1225         for (i = 0; i < card->qdio.no_out_queues; ++i) {
1226                 if (card->qdio.out_qs[i]) {
1227                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 0);
1228                 }
1229         }
1230 }
1231 EXPORT_SYMBOL_GPL(qeth_clear_qdio_buffers);
1232
1233 static void qeth_free_buffer_pool(struct qeth_card *card)
1234 {
1235         struct qeth_buffer_pool_entry *pool_entry, *tmp;
1236         int i = 0;
1237         list_for_each_entry_safe(pool_entry, tmp,
1238                                  &card->qdio.init_pool.entry_list, init_list){
1239                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i)
1240                         free_page((unsigned long)pool_entry->elements[i]);
1241                 list_del(&pool_entry->init_list);
1242                 kfree(pool_entry);
1243         }
1244 }
1245
1246 static void qeth_clean_channel(struct qeth_channel *channel)
1247 {
1248         struct ccw_device *cdev = channel->ccwdev;
1249         int cnt;
1250
1251         QETH_DBF_TEXT(SETUP, 2, "freech");
1252
1253         spin_lock_irq(get_ccwdev_lock(cdev));
1254         cdev->handler = NULL;
1255         spin_unlock_irq(get_ccwdev_lock(cdev));
1256
1257         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++)
1258                 kfree(channel->iob[cnt].data);
1259         kfree(channel->ccw);
1260 }
1261
1262 static int qeth_setup_channel(struct qeth_channel *channel, bool alloc_buffers)
1263 {
1264         struct ccw_device *cdev = channel->ccwdev;
1265         int cnt;
1266
1267         QETH_DBF_TEXT(SETUP, 2, "setupch");
1268
1269         channel->ccw = kmalloc(sizeof(struct ccw1), GFP_KERNEL | GFP_DMA);
1270         if (!channel->ccw)
1271                 return -ENOMEM;
1272         channel->state = CH_STATE_DOWN;
1273         atomic_set(&channel->irq_pending, 0);
1274         init_waitqueue_head(&channel->wait_q);
1275
1276         spin_lock_irq(get_ccwdev_lock(cdev));
1277         cdev->handler = qeth_irq;
1278         spin_unlock_irq(get_ccwdev_lock(cdev));
1279
1280         if (!alloc_buffers)
1281                 return 0;
1282
1283         for (cnt = 0; cnt < QETH_CMD_BUFFER_NO; cnt++) {
1284                 channel->iob[cnt].data = kmalloc(QETH_BUFSIZE,
1285                                                  GFP_KERNEL | GFP_DMA);
1286                 if (channel->iob[cnt].data == NULL)
1287                         break;
1288                 channel->iob[cnt].state = BUF_STATE_FREE;
1289                 channel->iob[cnt].channel = channel;
1290                 channel->iob[cnt].callback = qeth_send_control_data_cb;
1291                 channel->iob[cnt].rc = 0;
1292         }
1293         if (cnt < QETH_CMD_BUFFER_NO) {
1294                 qeth_clean_channel(channel);
1295                 return -ENOMEM;
1296         }
1297         channel->io_buf_no = 0;
1298         spin_lock_init(&channel->iob_lock);
1299
1300         return 0;
1301 }
1302
1303 static void qeth_set_single_write_queues(struct qeth_card *card)
1304 {
1305         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1306             (card->qdio.no_out_queues == 4))
1307                 qeth_free_qdio_buffers(card);
1308
1309         card->qdio.no_out_queues = 1;
1310         if (card->qdio.default_out_queue != 0)
1311                 dev_info(&card->gdev->dev, "Priority Queueing not supported\n");
1312
1313         card->qdio.default_out_queue = 0;
1314 }
1315
1316 static void qeth_set_multiple_write_queues(struct qeth_card *card)
1317 {
1318         if ((atomic_read(&card->qdio.state) != QETH_QDIO_UNINITIALIZED) &&
1319             (card->qdio.no_out_queues == 1)) {
1320                 qeth_free_qdio_buffers(card);
1321                 card->qdio.default_out_queue = 2;
1322         }
1323         card->qdio.no_out_queues = 4;
1324 }
1325
1326 static void qeth_update_from_chp_desc(struct qeth_card *card)
1327 {
1328         struct ccw_device *ccwdev;
1329         struct channel_path_desc_fmt0 *chp_dsc;
1330
1331         QETH_DBF_TEXT(SETUP, 2, "chp_desc");
1332
1333         ccwdev = card->data.ccwdev;
1334         chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
1335         if (!chp_dsc)
1336                 goto out;
1337
1338         card->info.func_level = 0x4100 + chp_dsc->desc;
1339         if (card->info.type == QETH_CARD_TYPE_IQD)
1340                 goto out;
1341
1342         /* CHPP field bit 6 == 1 -> single queue */
1343         if ((chp_dsc->chpp & 0x02) == 0x02)
1344                 qeth_set_single_write_queues(card);
1345         else
1346                 qeth_set_multiple_write_queues(card);
1347 out:
1348         kfree(chp_dsc);
1349         QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
1350         QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
1351 }
1352
1353 static void qeth_init_qdio_info(struct qeth_card *card)
1354 {
1355         QETH_DBF_TEXT(SETUP, 4, "intqdinf");
1356         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
1357         card->qdio.do_prio_queueing = QETH_PRIOQ_DEFAULT;
1358         card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
1359         card->qdio.no_out_queues = QETH_MAX_QUEUES;
1360
1361         /* inbound */
1362         card->qdio.no_in_queues = 1;
1363         card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
1364         if (card->info.type == QETH_CARD_TYPE_IQD)
1365                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
1366         else
1367                 card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_DEFAULT;
1368         card->qdio.in_buf_pool.buf_count = card->qdio.init_pool.buf_count;
1369         INIT_LIST_HEAD(&card->qdio.in_buf_pool.entry_list);
1370         INIT_LIST_HEAD(&card->qdio.init_pool.entry_list);
1371 }
1372
1373 static void qeth_set_initial_options(struct qeth_card *card)
1374 {
1375         card->options.route4.type = NO_ROUTER;
1376         card->options.route6.type = NO_ROUTER;
1377         card->options.rx_sg_cb = QETH_RX_SG_CB;
1378         card->options.isolation = ISOLATION_MODE_NONE;
1379         card->options.cq = QETH_CQ_DISABLED;
1380         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
1381 }
1382
1383 static int qeth_do_start_thread(struct qeth_card *card, unsigned long thread)
1384 {
1385         unsigned long flags;
1386         int rc = 0;
1387
1388         spin_lock_irqsave(&card->thread_mask_lock, flags);
1389         QETH_CARD_TEXT_(card, 4, "  %02x%02x%02x",
1390                         (u8) card->thread_start_mask,
1391                         (u8) card->thread_allowed_mask,
1392                         (u8) card->thread_running_mask);
1393         rc = (card->thread_start_mask & thread);
1394         spin_unlock_irqrestore(&card->thread_mask_lock, flags);
1395         return rc;
1396 }
1397
1398 static void qeth_start_kernel_thread(struct work_struct *work)
1399 {
1400         struct task_struct *ts;
1401         struct qeth_card *card = container_of(work, struct qeth_card,
1402                                         kernel_thread_starter);
1403         QETH_CARD_TEXT(card , 2, "strthrd");
1404
1405         if (card->read.state != CH_STATE_UP &&
1406             card->write.state != CH_STATE_UP)
1407                 return;
1408         if (qeth_do_start_thread(card, QETH_RECOVER_THREAD)) {
1409                 ts = kthread_run(card->discipline->recover, (void *)card,
1410                                 "qeth_recover");
1411                 if (IS_ERR(ts)) {
1412                         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1413                         qeth_clear_thread_running_bit(card,
1414                                 QETH_RECOVER_THREAD);
1415                 }
1416         }
1417 }
1418
1419 static void qeth_buffer_reclaim_work(struct work_struct *);
1420 static void qeth_setup_card(struct qeth_card *card)
1421 {
1422         QETH_DBF_TEXT(SETUP, 2, "setupcrd");
1423         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1424
1425         card->info.type = CARD_RDEV(card)->id.driver_info;
1426         card->state = CARD_STATE_DOWN;
1427         spin_lock_init(&card->mclock);
1428         spin_lock_init(&card->lock);
1429         spin_lock_init(&card->ip_lock);
1430         spin_lock_init(&card->thread_mask_lock);
1431         mutex_init(&card->conf_mutex);
1432         mutex_init(&card->discipline_mutex);
1433         mutex_init(&card->vid_list_mutex);
1434         INIT_WORK(&card->kernel_thread_starter, qeth_start_kernel_thread);
1435         INIT_LIST_HEAD(&card->cmd_waiter_list);
1436         init_waitqueue_head(&card->wait_q);
1437         qeth_set_initial_options(card);
1438         /* IP address takeover */
1439         INIT_LIST_HEAD(&card->ipato.entries);
1440         qeth_init_qdio_info(card);
1441         INIT_DELAYED_WORK(&card->buffer_reclaim_work, qeth_buffer_reclaim_work);
1442         INIT_WORK(&card->close_dev_work, qeth_close_dev_handler);
1443 }
1444
1445 static void qeth_core_sl_print(struct seq_file *m, struct service_level *slr)
1446 {
1447         struct qeth_card *card = container_of(slr, struct qeth_card,
1448                                         qeth_service_level);
1449         if (card->info.mcl_level[0])
1450                 seq_printf(m, "qeth: %s firmware level %s\n",
1451                         CARD_BUS_ID(card), card->info.mcl_level);
1452 }
1453
1454 static struct qeth_card *qeth_alloc_card(struct ccwgroup_device *gdev)
1455 {
1456         struct qeth_card *card;
1457
1458         QETH_DBF_TEXT(SETUP, 2, "alloccrd");
1459         card = kzalloc(sizeof(*card), GFP_KERNEL);
1460         if (!card)
1461                 goto out;
1462         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1463
1464         card->gdev = gdev;
1465         dev_set_drvdata(&gdev->dev, card);
1466         CARD_RDEV(card) = gdev->cdev[0];
1467         CARD_WDEV(card) = gdev->cdev[1];
1468         CARD_DDEV(card) = gdev->cdev[2];
1469         if (qeth_setup_channel(&card->read, true))
1470                 goto out_ip;
1471         if (qeth_setup_channel(&card->write, true))
1472                 goto out_channel;
1473         if (qeth_setup_channel(&card->data, false))
1474                 goto out_data;
1475         card->qeth_service_level.seq_print = qeth_core_sl_print;
1476         register_service_level(&card->qeth_service_level);
1477         return card;
1478
1479 out_data:
1480         qeth_clean_channel(&card->write);
1481 out_channel:
1482         qeth_clean_channel(&card->read);
1483 out_ip:
1484         dev_set_drvdata(&gdev->dev, NULL);
1485         kfree(card);
1486 out:
1487         return NULL;
1488 }
1489
1490 static int qeth_clear_channel(struct qeth_card *card,
1491                               struct qeth_channel *channel)
1492 {
1493         int rc;
1494
1495         QETH_CARD_TEXT(card, 3, "clearch");
1496         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1497         rc = ccw_device_clear(channel->ccwdev, QETH_CLEAR_CHANNEL_PARM);
1498         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1499
1500         if (rc)
1501                 return rc;
1502         rc = wait_event_interruptible_timeout(card->wait_q,
1503                         channel->state == CH_STATE_STOPPED, QETH_TIMEOUT);
1504         if (rc == -ERESTARTSYS)
1505                 return rc;
1506         if (channel->state != CH_STATE_STOPPED)
1507                 return -ETIME;
1508         channel->state = CH_STATE_DOWN;
1509         return 0;
1510 }
1511
1512 static int qeth_halt_channel(struct qeth_card *card,
1513                              struct qeth_channel *channel)
1514 {
1515         int rc;
1516
1517         QETH_CARD_TEXT(card, 3, "haltch");
1518         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1519         rc = ccw_device_halt(channel->ccwdev, QETH_HALT_CHANNEL_PARM);
1520         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1521
1522         if (rc)
1523                 return rc;
1524         rc = wait_event_interruptible_timeout(card->wait_q,
1525                         channel->state == CH_STATE_HALTED, QETH_TIMEOUT);
1526         if (rc == -ERESTARTSYS)
1527                 return rc;
1528         if (channel->state != CH_STATE_HALTED)
1529                 return -ETIME;
1530         return 0;
1531 }
1532
1533 static int qeth_halt_channels(struct qeth_card *card)
1534 {
1535         int rc1 = 0, rc2 = 0, rc3 = 0;
1536
1537         QETH_CARD_TEXT(card, 3, "haltchs");
1538         rc1 = qeth_halt_channel(card, &card->read);
1539         rc2 = qeth_halt_channel(card, &card->write);
1540         rc3 = qeth_halt_channel(card, &card->data);
1541         if (rc1)
1542                 return rc1;
1543         if (rc2)
1544                 return rc2;
1545         return rc3;
1546 }
1547
1548 static int qeth_clear_channels(struct qeth_card *card)
1549 {
1550         int rc1 = 0, rc2 = 0, rc3 = 0;
1551
1552         QETH_CARD_TEXT(card, 3, "clearchs");
1553         rc1 = qeth_clear_channel(card, &card->read);
1554         rc2 = qeth_clear_channel(card, &card->write);
1555         rc3 = qeth_clear_channel(card, &card->data);
1556         if (rc1)
1557                 return rc1;
1558         if (rc2)
1559                 return rc2;
1560         return rc3;
1561 }
1562
1563 static int qeth_clear_halt_card(struct qeth_card *card, int halt)
1564 {
1565         int rc = 0;
1566
1567         QETH_CARD_TEXT(card, 3, "clhacrd");
1568
1569         if (halt)
1570                 rc = qeth_halt_channels(card);
1571         if (rc)
1572                 return rc;
1573         return qeth_clear_channels(card);
1574 }
1575
1576 int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
1577 {
1578         int rc = 0;
1579
1580         QETH_CARD_TEXT(card, 3, "qdioclr");
1581         switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
1582                 QETH_QDIO_CLEANING)) {
1583         case QETH_QDIO_ESTABLISHED:
1584                 if (card->info.type == QETH_CARD_TYPE_IQD)
1585                         rc = qdio_shutdown(CARD_DDEV(card),
1586                                 QDIO_FLAG_CLEANUP_USING_HALT);
1587                 else
1588                         rc = qdio_shutdown(CARD_DDEV(card),
1589                                 QDIO_FLAG_CLEANUP_USING_CLEAR);
1590                 if (rc)
1591                         QETH_CARD_TEXT_(card, 3, "1err%d", rc);
1592                 atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
1593                 break;
1594         case QETH_QDIO_CLEANING:
1595                 return rc;
1596         default:
1597                 break;
1598         }
1599         rc = qeth_clear_halt_card(card, use_halt);
1600         if (rc)
1601                 QETH_CARD_TEXT_(card, 3, "2err%d", rc);
1602         card->state = CARD_STATE_DOWN;
1603         return rc;
1604 }
1605 EXPORT_SYMBOL_GPL(qeth_qdio_clear_card);
1606
1607 static int qeth_read_conf_data(struct qeth_card *card, void **buffer,
1608                                int *length)
1609 {
1610         struct ciw *ciw;
1611         char *rcd_buf;
1612         int ret;
1613         struct qeth_channel *channel = &card->data;
1614
1615         /*
1616          * scan for RCD command in extended SenseID data
1617          */
1618         ciw = ccw_device_get_ciw(channel->ccwdev, CIW_TYPE_RCD);
1619         if (!ciw || ciw->cmd == 0)
1620                 return -EOPNOTSUPP;
1621         rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA);
1622         if (!rcd_buf)
1623                 return -ENOMEM;
1624
1625         qeth_setup_ccw(channel->ccw, ciw->cmd, ciw->count, rcd_buf);
1626         channel->state = CH_STATE_RCD;
1627         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1628         ret = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1629                                        QETH_RCD_PARM, LPM_ANYPATH, 0,
1630                                        QETH_RCD_TIMEOUT);
1631         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1632         if (!ret)
1633                 wait_event(card->wait_q,
1634                            (channel->state == CH_STATE_RCD_DONE ||
1635                             channel->state == CH_STATE_DOWN));
1636         if (channel->state == CH_STATE_DOWN)
1637                 ret = -EIO;
1638         else
1639                 channel->state = CH_STATE_DOWN;
1640         if (ret) {
1641                 kfree(rcd_buf);
1642                 *buffer = NULL;
1643                 *length = 0;
1644         } else {
1645                 *length = ciw->count;
1646                 *buffer = rcd_buf;
1647         }
1648         return ret;
1649 }
1650
1651 static void qeth_configure_unitaddr(struct qeth_card *card, char *prcd)
1652 {
1653         QETH_DBF_TEXT(SETUP, 2, "cfgunit");
1654         card->info.chpid = prcd[30];
1655         card->info.unit_addr2 = prcd[31];
1656         card->info.cula = prcd[63];
1657         card->info.guestlan = ((prcd[0x10] == _ascebc['V']) &&
1658                                (prcd[0x11] == _ascebc['M']));
1659 }
1660
1661 static enum qeth_discipline_id qeth_vm_detect_layer(struct qeth_card *card)
1662 {
1663         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1664         struct diag26c_vnic_resp *response = NULL;
1665         struct diag26c_vnic_req *request = NULL;
1666         struct ccw_dev_id id;
1667         char userid[80];
1668         int rc = 0;
1669
1670         QETH_DBF_TEXT(SETUP, 2, "vmlayer");
1671
1672         cpcmd("QUERY USERID", userid, sizeof(userid), &rc);
1673         if (rc)
1674                 goto out;
1675
1676         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
1677         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
1678         if (!request || !response) {
1679                 rc = -ENOMEM;
1680                 goto out;
1681         }
1682
1683         ccw_device_get_id(CARD_RDEV(card), &id);
1684         request->resp_buf_len = sizeof(*response);
1685         request->resp_version = DIAG26C_VERSION6_VM65918;
1686         request->req_format = DIAG26C_VNIC_INFO;
1687         ASCEBC(userid, 8);
1688         memcpy(&request->sys_name, userid, 8);
1689         request->devno = id.devno;
1690
1691         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1692         rc = diag26c(request, response, DIAG26C_PORT_VNIC);
1693         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
1694         if (rc)
1695                 goto out;
1696         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
1697
1698         if (request->resp_buf_len < sizeof(*response) ||
1699             response->version != request->resp_version) {
1700                 rc = -EIO;
1701                 goto out;
1702         }
1703
1704         if (response->protocol == VNIC_INFO_PROT_L2)
1705                 disc = QETH_DISCIPLINE_LAYER2;
1706         else if (response->protocol == VNIC_INFO_PROT_L3)
1707                 disc = QETH_DISCIPLINE_LAYER3;
1708
1709 out:
1710         kfree(response);
1711         kfree(request);
1712         if (rc)
1713                 QETH_DBF_TEXT_(SETUP, 2, "err%x", rc);
1714         return disc;
1715 }
1716
1717 /* Determine whether the device requires a specific layer discipline */
1718 static enum qeth_discipline_id qeth_enforce_discipline(struct qeth_card *card)
1719 {
1720         enum qeth_discipline_id disc = QETH_DISCIPLINE_UNDETERMINED;
1721
1722         if (card->info.type == QETH_CARD_TYPE_OSM ||
1723             card->info.type == QETH_CARD_TYPE_OSN)
1724                 disc = QETH_DISCIPLINE_LAYER2;
1725         else if (card->info.guestlan)
1726                 disc = (card->info.type == QETH_CARD_TYPE_IQD) ?
1727                                 QETH_DISCIPLINE_LAYER3 :
1728                                 qeth_vm_detect_layer(card);
1729
1730         switch (disc) {
1731         case QETH_DISCIPLINE_LAYER2:
1732                 QETH_DBF_TEXT(SETUP, 3, "force l2");
1733                 break;
1734         case QETH_DISCIPLINE_LAYER3:
1735                 QETH_DBF_TEXT(SETUP, 3, "force l3");
1736                 break;
1737         default:
1738                 QETH_DBF_TEXT(SETUP, 3, "force no");
1739         }
1740
1741         return disc;
1742 }
1743
1744 static void qeth_configure_blkt_default(struct qeth_card *card, char *prcd)
1745 {
1746         QETH_DBF_TEXT(SETUP, 2, "cfgblkt");
1747
1748         if (prcd[74] == 0xF0 && prcd[75] == 0xF0 &&
1749             prcd[76] >= 0xF1 && prcd[76] <= 0xF4) {
1750                 card->info.blkt.time_total = 0;
1751                 card->info.blkt.inter_packet = 0;
1752                 card->info.blkt.inter_packet_jumbo = 0;
1753         } else {
1754                 card->info.blkt.time_total = 250;
1755                 card->info.blkt.inter_packet = 5;
1756                 card->info.blkt.inter_packet_jumbo = 15;
1757         }
1758 }
1759
1760 static void qeth_init_tokens(struct qeth_card *card)
1761 {
1762         card->token.issuer_rm_w = 0x00010103UL;
1763         card->token.cm_filter_w = 0x00010108UL;
1764         card->token.cm_connection_w = 0x0001010aUL;
1765         card->token.ulp_filter_w = 0x0001010bUL;
1766         card->token.ulp_connection_w = 0x0001010dUL;
1767 }
1768
1769 static void qeth_init_func_level(struct qeth_card *card)
1770 {
1771         switch (card->info.type) {
1772         case QETH_CARD_TYPE_IQD:
1773                 card->info.func_level = QETH_IDX_FUNC_LEVEL_IQD;
1774                 break;
1775         case QETH_CARD_TYPE_OSD:
1776         case QETH_CARD_TYPE_OSN:
1777                 card->info.func_level = QETH_IDX_FUNC_LEVEL_OSD;
1778                 break;
1779         default:
1780                 break;
1781         }
1782 }
1783
1784 static int qeth_idx_activate_get_answer(struct qeth_card *card,
1785                                         struct qeth_channel *channel,
1786                                         void (*reply_cb)(struct qeth_card *,
1787                                                          struct qeth_channel *,
1788                                                          struct qeth_cmd_buffer *))
1789 {
1790         struct qeth_cmd_buffer *iob;
1791         int rc;
1792
1793         QETH_DBF_TEXT(SETUP, 2, "idxanswr");
1794         iob = qeth_get_buffer(channel);
1795         if (!iob)
1796                 return -ENOMEM;
1797         iob->callback = reply_cb;
1798         qeth_setup_ccw(channel->ccw, CCW_CMD_READ, QETH_BUFSIZE, iob->data);
1799
1800         wait_event(card->wait_q,
1801                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1802         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1803         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1804         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1805                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1806         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1807
1808         if (rc) {
1809                 QETH_DBF_MESSAGE(2, "Error2 in activating channel rc=%d\n", rc);
1810                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1811                 atomic_set(&channel->irq_pending, 0);
1812                 wake_up(&card->wait_q);
1813                 return rc;
1814         }
1815         rc = wait_event_interruptible_timeout(card->wait_q,
1816                          channel->state == CH_STATE_UP, QETH_TIMEOUT);
1817         if (rc == -ERESTARTSYS)
1818                 return rc;
1819         if (channel->state != CH_STATE_UP) {
1820                 rc = -ETIME;
1821                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
1822         } else
1823                 rc = 0;
1824         return rc;
1825 }
1826
1827 static int qeth_idx_activate_channel(struct qeth_card *card,
1828                                      struct qeth_channel *channel,
1829                                      void (*reply_cb)(struct qeth_card *,
1830                                                       struct qeth_channel *,
1831                                                       struct qeth_cmd_buffer *))
1832 {
1833         struct qeth_cmd_buffer *iob;
1834         __u16 temp;
1835         __u8 tmp;
1836         int rc;
1837         struct ccw_dev_id temp_devid;
1838
1839         QETH_DBF_TEXT(SETUP, 2, "idxactch");
1840
1841         iob = qeth_get_buffer(channel);
1842         if (!iob)
1843                 return -ENOMEM;
1844         iob->callback = reply_cb;
1845         qeth_setup_ccw(channel->ccw, CCW_CMD_WRITE, IDX_ACTIVATE_SIZE,
1846                        iob->data);
1847         if (channel == &card->write) {
1848                 memcpy(iob->data, IDX_ACTIVATE_WRITE, IDX_ACTIVATE_SIZE);
1849                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1850                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1851                 card->seqno.trans_hdr++;
1852         } else {
1853                 memcpy(iob->data, IDX_ACTIVATE_READ, IDX_ACTIVATE_SIZE);
1854                 memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
1855                        &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
1856         }
1857         tmp = ((u8)card->dev->dev_port) | 0x80;
1858         memcpy(QETH_IDX_ACT_PNO(iob->data), &tmp, 1);
1859         memcpy(QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1860                &card->token.issuer_rm_w, QETH_MPC_TOKEN_LENGTH);
1861         memcpy(QETH_IDX_ACT_FUNC_LEVEL(iob->data),
1862                &card->info.func_level, sizeof(__u16));
1863         ccw_device_get_id(CARD_DDEV(card), &temp_devid);
1864         memcpy(QETH_IDX_ACT_QDIO_DEV_CUA(iob->data), &temp_devid.devno, 2);
1865         temp = (card->info.cula << 8) + card->info.unit_addr2;
1866         memcpy(QETH_IDX_ACT_QDIO_DEV_REALADDR(iob->data), &temp, 2);
1867
1868         wait_event(card->wait_q,
1869                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1870         QETH_DBF_TEXT(SETUP, 6, "noirqpnd");
1871         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1872         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1873                                       (addr_t) iob, 0, 0, QETH_TIMEOUT);
1874         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1875
1876         if (rc) {
1877                 QETH_DBF_MESSAGE(2, "Error1 in activating channel. rc=%d\n",
1878                         rc);
1879                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1880                 atomic_set(&channel->irq_pending, 0);
1881                 wake_up(&card->wait_q);
1882                 return rc;
1883         }
1884         rc = wait_event_interruptible_timeout(card->wait_q,
1885                         channel->state == CH_STATE_ACTIVATING, QETH_TIMEOUT);
1886         if (rc == -ERESTARTSYS)
1887                 return rc;
1888         if (channel->state != CH_STATE_ACTIVATING) {
1889                 dev_warn(&channel->ccwdev->dev, "The qeth device driver"
1890                         " failed to recover an error on the device\n");
1891                 QETH_DBF_MESSAGE(2, "IDX activate timed out on channel %x\n",
1892                                  CCW_DEVID(channel->ccwdev));
1893                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", -ETIME);
1894                 return -ETIME;
1895         }
1896         return qeth_idx_activate_get_answer(card, channel, reply_cb);
1897 }
1898
1899 static int qeth_peer_func_level(int level)
1900 {
1901         if ((level & 0xff) == 8)
1902                 return (level & 0xff) + 0x400;
1903         if (((level >> 8) & 3) == 1)
1904                 return (level & 0xff) + 0x200;
1905         return level;
1906 }
1907
1908 static void qeth_idx_write_cb(struct qeth_card *card,
1909                               struct qeth_channel *channel,
1910                               struct qeth_cmd_buffer *iob)
1911 {
1912         __u16 temp;
1913
1914         QETH_DBF_TEXT(SETUP , 2, "idxwrcb");
1915
1916         if (channel->state == CH_STATE_DOWN) {
1917                 channel->state = CH_STATE_ACTIVATING;
1918                 goto out;
1919         }
1920
1921         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1922                 if (QETH_IDX_ACT_CAUSE_CODE(iob->data) == QETH_IDX_ACT_ERR_EXCL)
1923                         dev_err(&channel->ccwdev->dev,
1924                                 "The adapter is used exclusively by another "
1925                                 "host\n");
1926                 else
1927                         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1928                                          CCW_DEVID(channel->ccwdev));
1929                 goto out;
1930         }
1931         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1932         if ((temp & ~0x0100) != qeth_peer_func_level(card->info.func_level)) {
1933                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1934                                  CCW_DEVID(channel->ccwdev),
1935                                  card->info.func_level, temp);
1936                 goto out;
1937         }
1938         channel->state = CH_STATE_UP;
1939 out:
1940         qeth_release_buffer(channel, iob);
1941 }
1942
1943 static void qeth_idx_read_cb(struct qeth_card *card,
1944                              struct qeth_channel *channel,
1945                              struct qeth_cmd_buffer *iob)
1946 {
1947         __u16 temp;
1948
1949         QETH_DBF_TEXT(SETUP , 2, "idxrdcb");
1950         if (channel->state == CH_STATE_DOWN) {
1951                 channel->state = CH_STATE_ACTIVATING;
1952                 goto out;
1953         }
1954
1955         if (qeth_check_idx_response(card, iob->data))
1956                         goto out;
1957
1958         if (!(QETH_IS_IDX_ACT_POS_REPLY(iob->data))) {
1959                 switch (QETH_IDX_ACT_CAUSE_CODE(iob->data)) {
1960                 case QETH_IDX_ACT_ERR_EXCL:
1961                         dev_err(&channel->ccwdev->dev,
1962                                 "The adapter is used exclusively by another "
1963                                 "host\n");
1964                         break;
1965                 case QETH_IDX_ACT_ERR_AUTH:
1966                 case QETH_IDX_ACT_ERR_AUTH_USER:
1967                         dev_err(&channel->ccwdev->dev,
1968                                 "Setting the device online failed because of "
1969                                 "insufficient authorization\n");
1970                         break;
1971                 default:
1972                         QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: negative reply\n",
1973                                          CCW_DEVID(channel->ccwdev));
1974                 }
1975                 QETH_CARD_TEXT_(card, 2, "idxread%c",
1976                         QETH_IDX_ACT_CAUSE_CODE(iob->data));
1977                 goto out;
1978         }
1979
1980         memcpy(&temp, QETH_IDX_ACT_FUNC_LEVEL(iob->data), 2);
1981         if (temp != qeth_peer_func_level(card->info.func_level)) {
1982                 QETH_DBF_MESSAGE(2, "IDX_ACTIVATE on channel %x: function level mismatch (sent: %#x, received: %#x)\n",
1983                                  CCW_DEVID(channel->ccwdev),
1984                                  card->info.func_level, temp);
1985                 goto out;
1986         }
1987         memcpy(&card->token.issuer_rm_r,
1988                QETH_IDX_ACT_ISSUER_RM_TOKEN(iob->data),
1989                QETH_MPC_TOKEN_LENGTH);
1990         memcpy(&card->info.mcl_level[0],
1991                QETH_IDX_REPLY_LEVEL(iob->data), QETH_MCL_LENGTH);
1992         channel->state = CH_STATE_UP;
1993 out:
1994         qeth_release_buffer(channel, iob);
1995 }
1996
1997 void qeth_prepare_control_data(struct qeth_card *card, int len,
1998                 struct qeth_cmd_buffer *iob)
1999 {
2000         qeth_setup_ccw(iob->channel->ccw, CCW_CMD_WRITE, len, iob->data);
2001         iob->callback = qeth_release_buffer_cb;
2002
2003         memcpy(QETH_TRANSPORT_HEADER_SEQ_NO(iob->data),
2004                &card->seqno.trans_hdr, QETH_SEQ_NO_LENGTH);
2005         card->seqno.trans_hdr++;
2006         memcpy(QETH_PDU_HEADER_SEQ_NO(iob->data),
2007                &card->seqno.pdu_hdr, QETH_SEQ_NO_LENGTH);
2008         card->seqno.pdu_hdr++;
2009         memcpy(QETH_PDU_HEADER_ACK_SEQ_NO(iob->data),
2010                &card->seqno.pdu_hdr_ack, QETH_SEQ_NO_LENGTH);
2011         QETH_DBF_HEX(CTRL, 2, iob->data, QETH_DBF_CTRL_LEN);
2012 }
2013 EXPORT_SYMBOL_GPL(qeth_prepare_control_data);
2014
2015 /**
2016  * qeth_send_control_data() -   send control command to the card
2017  * @card:                       qeth_card structure pointer
2018  * @len:                        size of the command buffer
2019  * @iob:                        qeth_cmd_buffer pointer
2020  * @reply_cb:                   callback function pointer
2021  * @cb_card:                    pointer to the qeth_card structure
2022  * @cb_reply:                   pointer to the qeth_reply structure
2023  * @cb_cmd:                     pointer to the original iob for non-IPA
2024  *                              commands, or to the qeth_ipa_cmd structure
2025  *                              for the IPA commands.
2026  * @reply_param:                private pointer passed to the callback
2027  *
2028  * Returns the value of the `return_code' field of the response
2029  * block returned from the hardware, or other error indication.
2030  * Value of zero indicates successful execution of the command.
2031  *
2032  * Callback function gets called one or more times, with cb_cmd
2033  * pointing to the response returned by the hardware. Callback
2034  * function must return non-zero if more reply blocks are expected,
2035  * and zero if the last or only reply block is received. Callback
2036  * function can get the value of the reply_param pointer from the
2037  * field 'param' of the structure qeth_reply.
2038  */
2039
2040 int qeth_send_control_data(struct qeth_card *card, int len,
2041                 struct qeth_cmd_buffer *iob,
2042                 int (*reply_cb)(struct qeth_card *cb_card,
2043                                 struct qeth_reply *cb_reply,
2044                                 unsigned long cb_cmd),
2045                 void *reply_param)
2046 {
2047         struct qeth_channel *channel = iob->channel;
2048         int rc;
2049         struct qeth_reply *reply = NULL;
2050         unsigned long timeout, event_timeout;
2051         struct qeth_ipa_cmd *cmd = NULL;
2052
2053         QETH_CARD_TEXT(card, 2, "sendctl");
2054
2055         if (card->read_or_write_problem) {
2056                 qeth_release_buffer(channel, iob);
2057                 return -EIO;
2058         }
2059         reply = qeth_alloc_reply(card);
2060         if (!reply) {
2061                 return -ENOMEM;
2062         }
2063         reply->callback = reply_cb;
2064         reply->param = reply_param;
2065
2066         init_waitqueue_head(&reply->wait_q);
2067
2068         while (atomic_cmpxchg(&channel->irq_pending, 0, 1)) ;
2069
2070         if (IS_IPA(iob->data)) {
2071                 cmd = __ipa_cmd(iob);
2072                 cmd->hdr.seqno = card->seqno.ipa++;
2073                 reply->seqno = cmd->hdr.seqno;
2074                 event_timeout = QETH_IPA_TIMEOUT;
2075         } else {
2076                 reply->seqno = QETH_IDX_COMMAND_SEQNO;
2077                 event_timeout = QETH_TIMEOUT;
2078         }
2079         qeth_prepare_control_data(card, len, iob);
2080
2081         spin_lock_irq(&card->lock);
2082         list_add_tail(&reply->list, &card->cmd_waiter_list);
2083         spin_unlock_irq(&card->lock);
2084
2085         timeout = jiffies + event_timeout;
2086
2087         QETH_CARD_TEXT(card, 6, "noirqpnd");
2088         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
2089         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
2090                                       (addr_t) iob, 0, 0, event_timeout);
2091         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
2092         if (rc) {
2093                 QETH_DBF_MESSAGE(2, "qeth_send_control_data on device %x: ccw_device_start rc = %i\n",
2094                                  CARD_DEVID(card), rc);
2095                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
2096                 spin_lock_irq(&card->lock);
2097                 list_del_init(&reply->list);
2098                 qeth_put_reply(reply);
2099                 spin_unlock_irq(&card->lock);
2100                 qeth_release_buffer(channel, iob);
2101                 atomic_set(&channel->irq_pending, 0);
2102                 wake_up(&card->wait_q);
2103                 return rc;
2104         }
2105
2106         /* we have only one long running ipassist, since we can ensure
2107            process context of this command we can sleep */
2108         if (cmd && cmd->hdr.command == IPA_CMD_SETIP &&
2109             cmd->hdr.prot_version == QETH_PROT_IPV4) {
2110                 if (!wait_event_timeout(reply->wait_q,
2111                     atomic_read(&reply->received), event_timeout))
2112                         goto time_err;
2113         } else {
2114                 while (!atomic_read(&reply->received)) {
2115                         if (time_after(jiffies, timeout))
2116                                 goto time_err;
2117                         cpu_relax();
2118                 }
2119         }
2120
2121         rc = reply->rc;
2122         qeth_put_reply(reply);
2123         return rc;
2124
2125 time_err:
2126         reply->rc = -ETIME;
2127         spin_lock_irq(&card->lock);
2128         list_del_init(&reply->list);
2129         spin_unlock_irq(&card->lock);
2130         atomic_inc(&reply->received);
2131         rc = reply->rc;
2132         qeth_put_reply(reply);
2133         return rc;
2134 }
2135 EXPORT_SYMBOL_GPL(qeth_send_control_data);
2136
2137 static int qeth_cm_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2138                 unsigned long data)
2139 {
2140         struct qeth_cmd_buffer *iob;
2141
2142         QETH_DBF_TEXT(SETUP, 2, "cmenblcb");
2143
2144         iob = (struct qeth_cmd_buffer *) data;
2145         memcpy(&card->token.cm_filter_r,
2146                QETH_CM_ENABLE_RESP_FILTER_TOKEN(iob->data),
2147                QETH_MPC_TOKEN_LENGTH);
2148         return 0;
2149 }
2150
2151 static int qeth_cm_enable(struct qeth_card *card)
2152 {
2153         int rc;
2154         struct qeth_cmd_buffer *iob;
2155
2156         QETH_DBF_TEXT(SETUP, 2, "cmenable");
2157
2158         iob = qeth_wait_for_buffer(&card->write);
2159         memcpy(iob->data, CM_ENABLE, CM_ENABLE_SIZE);
2160         memcpy(QETH_CM_ENABLE_ISSUER_RM_TOKEN(iob->data),
2161                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2162         memcpy(QETH_CM_ENABLE_FILTER_TOKEN(iob->data),
2163                &card->token.cm_filter_w, QETH_MPC_TOKEN_LENGTH);
2164
2165         rc = qeth_send_control_data(card, CM_ENABLE_SIZE, iob,
2166                                     qeth_cm_enable_cb, NULL);
2167         return rc;
2168 }
2169
2170 static int qeth_cm_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2171                 unsigned long data)
2172 {
2173         struct qeth_cmd_buffer *iob;
2174
2175         QETH_DBF_TEXT(SETUP, 2, "cmsetpcb");
2176
2177         iob = (struct qeth_cmd_buffer *) data;
2178         memcpy(&card->token.cm_connection_r,
2179                QETH_CM_SETUP_RESP_DEST_ADDR(iob->data),
2180                QETH_MPC_TOKEN_LENGTH);
2181         return 0;
2182 }
2183
2184 static int qeth_cm_setup(struct qeth_card *card)
2185 {
2186         int rc;
2187         struct qeth_cmd_buffer *iob;
2188
2189         QETH_DBF_TEXT(SETUP, 2, "cmsetup");
2190
2191         iob = qeth_wait_for_buffer(&card->write);
2192         memcpy(iob->data, CM_SETUP, CM_SETUP_SIZE);
2193         memcpy(QETH_CM_SETUP_DEST_ADDR(iob->data),
2194                &card->token.issuer_rm_r, QETH_MPC_TOKEN_LENGTH);
2195         memcpy(QETH_CM_SETUP_CONNECTION_TOKEN(iob->data),
2196                &card->token.cm_connection_w, QETH_MPC_TOKEN_LENGTH);
2197         memcpy(QETH_CM_SETUP_FILTER_TOKEN(iob->data),
2198                &card->token.cm_filter_r, QETH_MPC_TOKEN_LENGTH);
2199         rc = qeth_send_control_data(card, CM_SETUP_SIZE, iob,
2200                                     qeth_cm_setup_cb, NULL);
2201         return rc;
2202 }
2203
2204 static int qeth_update_max_mtu(struct qeth_card *card, unsigned int max_mtu)
2205 {
2206         struct net_device *dev = card->dev;
2207         unsigned int new_mtu;
2208
2209         if (!max_mtu) {
2210                 /* IQD needs accurate max MTU to set up its RX buffers: */
2211                 if (IS_IQD(card))
2212                         return -EINVAL;
2213                 /* tolerate quirky HW: */
2214                 max_mtu = ETH_MAX_MTU;
2215         }
2216
2217         rtnl_lock();
2218         if (IS_IQD(card)) {
2219                 /* move any device with default MTU to new max MTU: */
2220                 new_mtu = (dev->mtu == dev->max_mtu) ? max_mtu : dev->mtu;
2221
2222                 /* adjust RX buffer size to new max MTU: */
2223                 card->qdio.in_buf_size = max_mtu + 2 * PAGE_SIZE;
2224                 if (dev->max_mtu && dev->max_mtu != max_mtu)
2225                         qeth_free_qdio_buffers(card);
2226         } else {
2227                 if (dev->mtu)
2228                         new_mtu = dev->mtu;
2229                 /* default MTUs for first setup: */
2230                 else if (IS_LAYER2(card))
2231                         new_mtu = ETH_DATA_LEN;
2232                 else
2233                         new_mtu = ETH_DATA_LEN - 8; /* allow for LLC + SNAP */
2234         }
2235
2236         dev->max_mtu = max_mtu;
2237         dev->mtu = min(new_mtu, max_mtu);
2238         rtnl_unlock();
2239         return 0;
2240 }
2241
2242 static int qeth_get_mtu_outof_framesize(int framesize)
2243 {
2244         switch (framesize) {
2245         case 0x4000:
2246                 return 8192;
2247         case 0x6000:
2248                 return 16384;
2249         case 0xa000:
2250                 return 32768;
2251         case 0xffff:
2252                 return 57344;
2253         default:
2254                 return 0;
2255         }
2256 }
2257
2258 static int qeth_ulp_enable_cb(struct qeth_card *card, struct qeth_reply *reply,
2259                 unsigned long data)
2260 {
2261         __u16 mtu, framesize;
2262         __u16 len;
2263         __u8 link_type;
2264         struct qeth_cmd_buffer *iob;
2265
2266         QETH_DBF_TEXT(SETUP, 2, "ulpenacb");
2267
2268         iob = (struct qeth_cmd_buffer *) data;
2269         memcpy(&card->token.ulp_filter_r,
2270                QETH_ULP_ENABLE_RESP_FILTER_TOKEN(iob->data),
2271                QETH_MPC_TOKEN_LENGTH);
2272         if (card->info.type == QETH_CARD_TYPE_IQD) {
2273                 memcpy(&framesize, QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data), 2);
2274                 mtu = qeth_get_mtu_outof_framesize(framesize);
2275         } else {
2276                 mtu = *(__u16 *)QETH_ULP_ENABLE_RESP_MAX_MTU(iob->data);
2277         }
2278         *(u16 *)reply->param = mtu;
2279
2280         memcpy(&len, QETH_ULP_ENABLE_RESP_DIFINFO_LEN(iob->data), 2);
2281         if (len >= QETH_MPC_DIFINFO_LEN_INDICATES_LINK_TYPE) {
2282                 memcpy(&link_type,
2283                        QETH_ULP_ENABLE_RESP_LINK_TYPE(iob->data), 1);
2284                 card->info.link_type = link_type;
2285         } else
2286                 card->info.link_type = 0;
2287         QETH_DBF_TEXT_(SETUP, 2, "link%d", card->info.link_type);
2288         return 0;
2289 }
2290
2291 static u8 qeth_mpc_select_prot_type(struct qeth_card *card)
2292 {
2293         if (IS_OSN(card))
2294                 return QETH_PROT_OSN2;
2295         return IS_LAYER2(card) ? QETH_PROT_LAYER2 : QETH_PROT_TCPIP;
2296 }
2297
2298 static int qeth_ulp_enable(struct qeth_card *card)
2299 {
2300         u8 prot_type = qeth_mpc_select_prot_type(card);
2301         struct qeth_cmd_buffer *iob;
2302         u16 max_mtu;
2303         int rc;
2304
2305         /*FIXME: trace view callbacks*/
2306         QETH_DBF_TEXT(SETUP, 2, "ulpenabl");
2307
2308         iob = qeth_wait_for_buffer(&card->write);
2309         memcpy(iob->data, ULP_ENABLE, ULP_ENABLE_SIZE);
2310
2311         *(QETH_ULP_ENABLE_LINKNUM(iob->data)) = (u8) card->dev->dev_port;
2312         memcpy(QETH_ULP_ENABLE_PROT_TYPE(iob->data), &prot_type, 1);
2313         memcpy(QETH_ULP_ENABLE_DEST_ADDR(iob->data),
2314                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2315         memcpy(QETH_ULP_ENABLE_FILTER_TOKEN(iob->data),
2316                &card->token.ulp_filter_w, QETH_MPC_TOKEN_LENGTH);
2317         rc = qeth_send_control_data(card, ULP_ENABLE_SIZE, iob,
2318                                     qeth_ulp_enable_cb, &max_mtu);
2319         if (rc)
2320                 return rc;
2321         return qeth_update_max_mtu(card, max_mtu);
2322 }
2323
2324 static int qeth_ulp_setup_cb(struct qeth_card *card, struct qeth_reply *reply,
2325                 unsigned long data)
2326 {
2327         struct qeth_cmd_buffer *iob;
2328
2329         QETH_DBF_TEXT(SETUP, 2, "ulpstpcb");
2330
2331         iob = (struct qeth_cmd_buffer *) data;
2332         memcpy(&card->token.ulp_connection_r,
2333                QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2334                QETH_MPC_TOKEN_LENGTH);
2335         if (!strncmp("00S", QETH_ULP_SETUP_RESP_CONNECTION_TOKEN(iob->data),
2336                      3)) {
2337                 QETH_DBF_TEXT(SETUP, 2, "olmlimit");
2338                 dev_err(&card->gdev->dev, "A connection could not be "
2339                         "established because of an OLM limit\n");
2340                 iob->rc = -EMLINK;
2341         }
2342         QETH_DBF_TEXT_(SETUP, 2, "  rc%d", iob->rc);
2343         return 0;
2344 }
2345
2346 static int qeth_ulp_setup(struct qeth_card *card)
2347 {
2348         int rc;
2349         __u16 temp;
2350         struct qeth_cmd_buffer *iob;
2351         struct ccw_dev_id dev_id;
2352
2353         QETH_DBF_TEXT(SETUP, 2, "ulpsetup");
2354
2355         iob = qeth_wait_for_buffer(&card->write);
2356         memcpy(iob->data, ULP_SETUP, ULP_SETUP_SIZE);
2357
2358         memcpy(QETH_ULP_SETUP_DEST_ADDR(iob->data),
2359                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2360         memcpy(QETH_ULP_SETUP_CONNECTION_TOKEN(iob->data),
2361                &card->token.ulp_connection_w, QETH_MPC_TOKEN_LENGTH);
2362         memcpy(QETH_ULP_SETUP_FILTER_TOKEN(iob->data),
2363                &card->token.ulp_filter_r, QETH_MPC_TOKEN_LENGTH);
2364
2365         ccw_device_get_id(CARD_DDEV(card), &dev_id);
2366         memcpy(QETH_ULP_SETUP_CUA(iob->data), &dev_id.devno, 2);
2367         temp = (card->info.cula << 8) + card->info.unit_addr2;
2368         memcpy(QETH_ULP_SETUP_REAL_DEVADDR(iob->data), &temp, 2);
2369         rc = qeth_send_control_data(card, ULP_SETUP_SIZE, iob,
2370                                     qeth_ulp_setup_cb, NULL);
2371         return rc;
2372 }
2373
2374 static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *q, int bidx)
2375 {
2376         struct qeth_qdio_out_buffer *newbuf;
2377
2378         newbuf = kmem_cache_zalloc(qeth_qdio_outbuf_cache, GFP_ATOMIC);
2379         if (!newbuf)
2380                 return -ENOMEM;
2381
2382         newbuf->buffer = q->qdio_bufs[bidx];
2383         skb_queue_head_init(&newbuf->skb_list);
2384         lockdep_set_class(&newbuf->skb_list.lock, &qdio_out_skb_queue_key);
2385         newbuf->q = q;
2386         newbuf->next_pending = q->bufs[bidx];
2387         atomic_set(&newbuf->state, QETH_QDIO_BUF_EMPTY);
2388         q->bufs[bidx] = newbuf;
2389         return 0;
2390 }
2391
2392 static void qeth_free_qdio_out_buf(struct qeth_qdio_out_q *q)
2393 {
2394         if (!q)
2395                 return;
2396
2397         qdio_free_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2398         kfree(q);
2399 }
2400
2401 static struct qeth_qdio_out_q *qeth_alloc_qdio_out_buf(void)
2402 {
2403         struct qeth_qdio_out_q *q = kzalloc(sizeof(*q), GFP_KERNEL);
2404
2405         if (!q)
2406                 return NULL;
2407
2408         if (qdio_alloc_buffers(q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q)) {
2409                 kfree(q);
2410                 return NULL;
2411         }
2412         return q;
2413 }
2414
2415 static int qeth_alloc_qdio_buffers(struct qeth_card *card)
2416 {
2417         int i, j;
2418
2419         QETH_DBF_TEXT(SETUP, 2, "allcqdbf");
2420
2421         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED,
2422                 QETH_QDIO_ALLOCATED) != QETH_QDIO_UNINITIALIZED)
2423                 return 0;
2424
2425         QETH_DBF_TEXT(SETUP, 2, "inq");
2426         card->qdio.in_q = qeth_alloc_qdio_queue();
2427         if (!card->qdio.in_q)
2428                 goto out_nomem;
2429
2430         /* inbound buffer pool */
2431         if (qeth_alloc_buffer_pool(card))
2432                 goto out_freeinq;
2433
2434         /* outbound */
2435         card->qdio.out_qs =
2436                 kcalloc(card->qdio.no_out_queues,
2437                         sizeof(struct qeth_qdio_out_q *),
2438                         GFP_KERNEL);
2439         if (!card->qdio.out_qs)
2440                 goto out_freepool;
2441         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2442                 card->qdio.out_qs[i] = qeth_alloc_qdio_out_buf();
2443                 if (!card->qdio.out_qs[i])
2444                         goto out_freeoutq;
2445                 QETH_DBF_TEXT_(SETUP, 2, "outq %i", i);
2446                 QETH_DBF_HEX(SETUP, 2, &card->qdio.out_qs[i], sizeof(void *));
2447                 card->qdio.out_qs[i]->queue_no = i;
2448                 /* give outbound qeth_qdio_buffers their qdio_buffers */
2449                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2450                         WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
2451                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
2452                                 goto out_freeoutqbufs;
2453                 }
2454         }
2455
2456         /* completion */
2457         if (qeth_alloc_cq(card))
2458                 goto out_freeoutq;
2459
2460         return 0;
2461
2462 out_freeoutqbufs:
2463         while (j > 0) {
2464                 --j;
2465                 kmem_cache_free(qeth_qdio_outbuf_cache,
2466                                 card->qdio.out_qs[i]->bufs[j]);
2467                 card->qdio.out_qs[i]->bufs[j] = NULL;
2468         }
2469 out_freeoutq:
2470         while (i > 0) {
2471                 qeth_free_qdio_out_buf(card->qdio.out_qs[--i]);
2472                 qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2473         }
2474         kfree(card->qdio.out_qs);
2475         card->qdio.out_qs = NULL;
2476 out_freepool:
2477         qeth_free_buffer_pool(card);
2478 out_freeinq:
2479         qeth_free_qdio_queue(card->qdio.in_q);
2480         card->qdio.in_q = NULL;
2481 out_nomem:
2482         atomic_set(&card->qdio.state, QETH_QDIO_UNINITIALIZED);
2483         return -ENOMEM;
2484 }
2485
2486 static void qeth_free_qdio_buffers(struct qeth_card *card)
2487 {
2488         int i, j;
2489
2490         if (atomic_xchg(&card->qdio.state, QETH_QDIO_UNINITIALIZED) ==
2491                 QETH_QDIO_UNINITIALIZED)
2492                 return;
2493
2494         qeth_free_cq(card);
2495         cancel_delayed_work_sync(&card->buffer_reclaim_work);
2496         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2497                 if (card->qdio.in_q->bufs[j].rx_skb)
2498                         dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb);
2499         }
2500         qeth_free_qdio_queue(card->qdio.in_q);
2501         card->qdio.in_q = NULL;
2502         /* inbound buffer pool */
2503         qeth_free_buffer_pool(card);
2504         /* free outbound qdio_qs */
2505         if (card->qdio.out_qs) {
2506                 for (i = 0; i < card->qdio.no_out_queues; ++i) {
2507                         qeth_clear_outq_buffers(card->qdio.out_qs[i], 1);
2508                         qeth_free_qdio_out_buf(card->qdio.out_qs[i]);
2509                 }
2510                 kfree(card->qdio.out_qs);
2511                 card->qdio.out_qs = NULL;
2512         }
2513 }
2514
2515 static void qeth_create_qib_param_field(struct qeth_card *card,
2516                 char *param_field)
2517 {
2518
2519         param_field[0] = _ascebc['P'];
2520         param_field[1] = _ascebc['C'];
2521         param_field[2] = _ascebc['I'];
2522         param_field[3] = _ascebc['T'];
2523         *((unsigned int *) (&param_field[4])) = QETH_PCI_THRESHOLD_A(card);
2524         *((unsigned int *) (&param_field[8])) = QETH_PCI_THRESHOLD_B(card);
2525         *((unsigned int *) (&param_field[12])) = QETH_PCI_TIMER_VALUE(card);
2526 }
2527
2528 static void qeth_create_qib_param_field_blkt(struct qeth_card *card,
2529                 char *param_field)
2530 {
2531         param_field[16] = _ascebc['B'];
2532         param_field[17] = _ascebc['L'];
2533         param_field[18] = _ascebc['K'];
2534         param_field[19] = _ascebc['T'];
2535         *((unsigned int *) (&param_field[20])) = card->info.blkt.time_total;
2536         *((unsigned int *) (&param_field[24])) = card->info.blkt.inter_packet;
2537         *((unsigned int *) (&param_field[28])) =
2538                 card->info.blkt.inter_packet_jumbo;
2539 }
2540
2541 static int qeth_qdio_activate(struct qeth_card *card)
2542 {
2543         QETH_DBF_TEXT(SETUP, 3, "qdioact");
2544         return qdio_activate(CARD_DDEV(card));
2545 }
2546
2547 static int qeth_dm_act(struct qeth_card *card)
2548 {
2549         int rc;
2550         struct qeth_cmd_buffer *iob;
2551
2552         QETH_DBF_TEXT(SETUP, 2, "dmact");
2553
2554         iob = qeth_wait_for_buffer(&card->write);
2555         memcpy(iob->data, DM_ACT, DM_ACT_SIZE);
2556
2557         memcpy(QETH_DM_ACT_DEST_ADDR(iob->data),
2558                &card->token.cm_connection_r, QETH_MPC_TOKEN_LENGTH);
2559         memcpy(QETH_DM_ACT_CONNECTION_TOKEN(iob->data),
2560                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2561         rc = qeth_send_control_data(card, DM_ACT_SIZE, iob, NULL, NULL);
2562         return rc;
2563 }
2564
2565 static int qeth_mpc_initialize(struct qeth_card *card)
2566 {
2567         int rc;
2568
2569         QETH_DBF_TEXT(SETUP, 2, "mpcinit");
2570
2571         rc = qeth_issue_next_read(card);
2572         if (rc) {
2573                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2574                 return rc;
2575         }
2576         rc = qeth_cm_enable(card);
2577         if (rc) {
2578                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
2579                 goto out_qdio;
2580         }
2581         rc = qeth_cm_setup(card);
2582         if (rc) {
2583                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
2584                 goto out_qdio;
2585         }
2586         rc = qeth_ulp_enable(card);
2587         if (rc) {
2588                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
2589                 goto out_qdio;
2590         }
2591         rc = qeth_ulp_setup(card);
2592         if (rc) {
2593                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2594                 goto out_qdio;
2595         }
2596         rc = qeth_alloc_qdio_buffers(card);
2597         if (rc) {
2598                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
2599                 goto out_qdio;
2600         }
2601         rc = qeth_qdio_establish(card);
2602         if (rc) {
2603                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
2604                 qeth_free_qdio_buffers(card);
2605                 goto out_qdio;
2606         }
2607         rc = qeth_qdio_activate(card);
2608         if (rc) {
2609                 QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
2610                 goto out_qdio;
2611         }
2612         rc = qeth_dm_act(card);
2613         if (rc) {
2614                 QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
2615                 goto out_qdio;
2616         }
2617
2618         return 0;
2619 out_qdio:
2620         qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
2621         qdio_free(CARD_DDEV(card));
2622         return rc;
2623 }
2624
2625 void qeth_print_status_message(struct qeth_card *card)
2626 {
2627         switch (card->info.type) {
2628         case QETH_CARD_TYPE_OSD:
2629         case QETH_CARD_TYPE_OSM:
2630         case QETH_CARD_TYPE_OSX:
2631                 /* VM will use a non-zero first character
2632                  * to indicate a HiperSockets like reporting
2633                  * of the level OSA sets the first character to zero
2634                  * */
2635                 if (!card->info.mcl_level[0]) {
2636                         sprintf(card->info.mcl_level, "%02x%02x",
2637                                 card->info.mcl_level[2],
2638                                 card->info.mcl_level[3]);
2639                         break;
2640                 }
2641                 /* fallthrough */
2642         case QETH_CARD_TYPE_IQD:
2643                 if ((card->info.guestlan) ||
2644                     (card->info.mcl_level[0] & 0x80)) {
2645                         card->info.mcl_level[0] = (char) _ebcasc[(__u8)
2646                                 card->info.mcl_level[0]];
2647                         card->info.mcl_level[1] = (char) _ebcasc[(__u8)
2648                                 card->info.mcl_level[1]];
2649                         card->info.mcl_level[2] = (char) _ebcasc[(__u8)
2650                                 card->info.mcl_level[2]];
2651                         card->info.mcl_level[3] = (char) _ebcasc[(__u8)
2652                                 card->info.mcl_level[3]];
2653                         card->info.mcl_level[QETH_MCL_LENGTH] = 0;
2654                 }
2655                 break;
2656         default:
2657                 memset(&card->info.mcl_level[0], 0, QETH_MCL_LENGTH + 1);
2658         }
2659         dev_info(&card->gdev->dev,
2660                  "Device is a%s card%s%s%s\nwith link type %s.\n",
2661                  qeth_get_cardname(card),
2662                  (card->info.mcl_level[0]) ? " (level: " : "",
2663                  (card->info.mcl_level[0]) ? card->info.mcl_level : "",
2664                  (card->info.mcl_level[0]) ? ")" : "",
2665                  qeth_get_cardname_short(card));
2666 }
2667 EXPORT_SYMBOL_GPL(qeth_print_status_message);
2668
2669 static void qeth_initialize_working_pool_list(struct qeth_card *card)
2670 {
2671         struct qeth_buffer_pool_entry *entry;
2672
2673         QETH_CARD_TEXT(card, 5, "inwrklst");
2674
2675         list_for_each_entry(entry,
2676                             &card->qdio.init_pool.entry_list, init_list) {
2677                 qeth_put_buffer_pool_entry(card, entry);
2678         }
2679 }
2680
2681 static struct qeth_buffer_pool_entry *qeth_find_free_buffer_pool_entry(
2682                                         struct qeth_card *card)
2683 {
2684         struct list_head *plh;
2685         struct qeth_buffer_pool_entry *entry;
2686         int i, free;
2687         struct page *page;
2688
2689         if (list_empty(&card->qdio.in_buf_pool.entry_list))
2690                 return NULL;
2691
2692         list_for_each(plh, &card->qdio.in_buf_pool.entry_list) {
2693                 entry = list_entry(plh, struct qeth_buffer_pool_entry, list);
2694                 free = 1;
2695                 for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2696                         if (page_count(virt_to_page(entry->elements[i])) > 1) {
2697                                 free = 0;
2698                                 break;
2699                         }
2700                 }
2701                 if (free) {
2702                         list_del_init(&entry->list);
2703                         return entry;
2704                 }
2705         }
2706
2707         /* no free buffer in pool so take first one and swap pages */
2708         entry = list_entry(card->qdio.in_buf_pool.entry_list.next,
2709                         struct qeth_buffer_pool_entry, list);
2710         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2711                 if (page_count(virt_to_page(entry->elements[i])) > 1) {
2712                         page = alloc_page(GFP_ATOMIC);
2713                         if (!page) {
2714                                 return NULL;
2715                         } else {
2716                                 free_page((unsigned long)entry->elements[i]);
2717                                 entry->elements[i] = page_address(page);
2718                                 if (card->options.performance_stats)
2719                                         card->perf_stats.sg_alloc_page_rx++;
2720                         }
2721                 }
2722         }
2723         list_del_init(&entry->list);
2724         return entry;
2725 }
2726
2727 static int qeth_init_input_buffer(struct qeth_card *card,
2728                 struct qeth_qdio_buffer *buf)
2729 {
2730         struct qeth_buffer_pool_entry *pool_entry;
2731         int i;
2732
2733         if ((card->options.cq == QETH_CQ_ENABLED) && (!buf->rx_skb)) {
2734                 buf->rx_skb = netdev_alloc_skb(card->dev,
2735                                                QETH_RX_PULL_LEN + ETH_HLEN);
2736                 if (!buf->rx_skb)
2737                         return 1;
2738         }
2739
2740         pool_entry = qeth_find_free_buffer_pool_entry(card);
2741         if (!pool_entry)
2742                 return 1;
2743
2744         /*
2745          * since the buffer is accessed only from the input_tasklet
2746          * there shouldn't be a need to synchronize; also, since we use
2747          * the QETH_IN_BUF_REQUEUE_THRESHOLD we should never run  out off
2748          * buffers
2749          */
2750
2751         buf->pool_entry = pool_entry;
2752         for (i = 0; i < QETH_MAX_BUFFER_ELEMENTS(card); ++i) {
2753                 buf->buffer->element[i].length = PAGE_SIZE;
2754                 buf->buffer->element[i].addr =  pool_entry->elements[i];
2755                 if (i == QETH_MAX_BUFFER_ELEMENTS(card) - 1)
2756                         buf->buffer->element[i].eflags = SBAL_EFLAGS_LAST_ENTRY;
2757                 else
2758                         buf->buffer->element[i].eflags = 0;
2759                 buf->buffer->element[i].sflags = 0;
2760         }
2761         return 0;
2762 }
2763
2764 int qeth_init_qdio_queues(struct qeth_card *card)
2765 {
2766         int i, j;
2767         int rc;
2768
2769         QETH_DBF_TEXT(SETUP, 2, "initqdqs");
2770
2771         /* inbound queue */
2772         qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q);
2773         memset(&card->rx, 0, sizeof(struct qeth_rx));
2774         qeth_initialize_working_pool_list(card);
2775         /*give only as many buffers to hardware as we have buffer pool entries*/
2776         for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i)
2777                 qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]);
2778         card->qdio.in_q->next_buf_to_init =
2779                 card->qdio.in_buf_pool.buf_count - 1;
2780         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,
2781                      card->qdio.in_buf_pool.buf_count - 1);
2782         if (rc) {
2783                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
2784                 return rc;
2785         }
2786
2787         /* completion */
2788         rc = qeth_cq_init(card);
2789         if (rc) {
2790                 return rc;
2791         }
2792
2793         /* outbound queue */
2794         for (i = 0; i < card->qdio.no_out_queues; ++i) {
2795                 qdio_reset_buffers(card->qdio.out_qs[i]->qdio_bufs,
2796                                    QDIO_MAX_BUFFERS_PER_Q);
2797                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
2798                         qeth_clear_output_buffer(card->qdio.out_qs[i],
2799                                                  card->qdio.out_qs[i]->bufs[j]);
2800                 }
2801                 card->qdio.out_qs[i]->card = card;
2802                 card->qdio.out_qs[i]->next_buf_to_fill = 0;
2803                 card->qdio.out_qs[i]->do_pack = 0;
2804                 atomic_set(&card->qdio.out_qs[i]->used_buffers, 0);
2805                 atomic_set(&card->qdio.out_qs[i]->set_pci_flags_count, 0);
2806                 atomic_set(&card->qdio.out_qs[i]->state,
2807                            QETH_OUT_Q_UNLOCKED);
2808         }
2809         return 0;
2810 }
2811 EXPORT_SYMBOL_GPL(qeth_init_qdio_queues);
2812
2813 static __u8 qeth_get_ipa_adp_type(enum qeth_link_types link_type)
2814 {
2815         switch (link_type) {
2816         case QETH_LINK_TYPE_HSTR:
2817                 return 2;
2818         default:
2819                 return 1;
2820         }
2821 }
2822
2823 static void qeth_fill_ipacmd_header(struct qeth_card *card,
2824                                     struct qeth_ipa_cmd *cmd,
2825                                     enum qeth_ipa_cmds command,
2826                                     enum qeth_prot_versions prot)
2827 {
2828         cmd->hdr.command = command;
2829         cmd->hdr.initiator = IPA_CMD_INITIATOR_HOST;
2830         /* cmd->hdr.seqno is set by qeth_send_control_data() */
2831         cmd->hdr.adapter_type = qeth_get_ipa_adp_type(card->info.link_type);
2832         cmd->hdr.rel_adapter_no = (u8) card->dev->dev_port;
2833         cmd->hdr.prim_version_no = IS_LAYER2(card) ? 2 : 1;
2834         cmd->hdr.param_count = 1;
2835         cmd->hdr.prot_version = prot;
2836 }
2837
2838 struct qeth_cmd_buffer *qeth_get_ipacmd_buffer(struct qeth_card *card,
2839                 enum qeth_ipa_cmds ipacmd, enum qeth_prot_versions prot)
2840 {
2841         struct qeth_cmd_buffer *iob;
2842
2843         iob = qeth_get_buffer(&card->write);
2844         if (iob) {
2845                 qeth_fill_ipacmd_header(card, __ipa_cmd(iob), ipacmd, prot);
2846         } else {
2847                 dev_warn(&card->gdev->dev,
2848                          "The qeth driver ran out of channel command buffers\n");
2849                 QETH_DBF_MESSAGE(1, "device %x ran out of channel command buffers",
2850                                  CARD_DEVID(card));
2851         }
2852
2853         return iob;
2854 }
2855 EXPORT_SYMBOL_GPL(qeth_get_ipacmd_buffer);
2856
2857 void qeth_prepare_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob)
2858 {
2859         u8 prot_type = qeth_mpc_select_prot_type(card);
2860
2861         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
2862         memcpy(QETH_IPA_CMD_PROT_TYPE(iob->data), &prot_type, 1);
2863         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
2864                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
2865 }
2866 EXPORT_SYMBOL_GPL(qeth_prepare_ipa_cmd);
2867
2868 /**
2869  * qeth_send_ipa_cmd() - send an IPA command
2870  *
2871  * See qeth_send_control_data() for explanation of the arguments.
2872  */
2873
2874 int qeth_send_ipa_cmd(struct qeth_card *card, struct qeth_cmd_buffer *iob,
2875                 int (*reply_cb)(struct qeth_card *, struct qeth_reply*,
2876                         unsigned long),
2877                 void *reply_param)
2878 {
2879         int rc;
2880
2881         QETH_CARD_TEXT(card, 4, "sendipa");
2882         qeth_prepare_ipa_cmd(card, iob);
2883         rc = qeth_send_control_data(card, IPA_CMD_LENGTH,
2884                                                 iob, reply_cb, reply_param);
2885         if (rc == -ETIME) {
2886                 qeth_clear_ipacmd_list(card);
2887                 qeth_schedule_recovery(card);
2888         }
2889         return rc;
2890 }
2891 EXPORT_SYMBOL_GPL(qeth_send_ipa_cmd);
2892
2893 static int qeth_send_startlan(struct qeth_card *card)
2894 {
2895         int rc;
2896         struct qeth_cmd_buffer *iob;
2897
2898         QETH_DBF_TEXT(SETUP, 2, "strtlan");
2899
2900         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_STARTLAN, 0);
2901         if (!iob)
2902                 return -ENOMEM;
2903         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
2904         return rc;
2905 }
2906
2907 static int qeth_setadpparms_inspect_rc(struct qeth_ipa_cmd *cmd)
2908 {
2909         if (!cmd->hdr.return_code)
2910                 cmd->hdr.return_code =
2911                         cmd->data.setadapterparms.hdr.return_code;
2912         return cmd->hdr.return_code;
2913 }
2914
2915 static int qeth_query_setadapterparms_cb(struct qeth_card *card,
2916                 struct qeth_reply *reply, unsigned long data)
2917 {
2918         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2919
2920         QETH_CARD_TEXT(card, 3, "quyadpcb");
2921         if (qeth_setadpparms_inspect_rc(cmd))
2922                 return 0;
2923
2924         if (cmd->data.setadapterparms.data.query_cmds_supp.lan_type & 0x7f) {
2925                 card->info.link_type =
2926                       cmd->data.setadapterparms.data.query_cmds_supp.lan_type;
2927                 QETH_DBF_TEXT_(SETUP, 2, "lnk %d", card->info.link_type);
2928         }
2929         card->options.adp.supported_funcs =
2930                 cmd->data.setadapterparms.data.query_cmds_supp.supported_cmds;
2931         return 0;
2932 }
2933
2934 static struct qeth_cmd_buffer *qeth_get_adapter_cmd(struct qeth_card *card,
2935                 __u32 command, __u32 cmdlen)
2936 {
2937         struct qeth_cmd_buffer *iob;
2938         struct qeth_ipa_cmd *cmd;
2939
2940         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETADAPTERPARMS,
2941                                      QETH_PROT_IPV4);
2942         if (iob) {
2943                 cmd = __ipa_cmd(iob);
2944                 cmd->data.setadapterparms.hdr.cmdlength = cmdlen;
2945                 cmd->data.setadapterparms.hdr.command_code = command;
2946                 cmd->data.setadapterparms.hdr.used_total = 1;
2947                 cmd->data.setadapterparms.hdr.seq_no = 1;
2948         }
2949
2950         return iob;
2951 }
2952
2953 static int qeth_query_setadapterparms(struct qeth_card *card)
2954 {
2955         int rc;
2956         struct qeth_cmd_buffer *iob;
2957
2958         QETH_CARD_TEXT(card, 3, "queryadp");
2959         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_COMMANDS_SUPPORTED,
2960                                    sizeof(struct qeth_ipacmd_setadpparms));
2961         if (!iob)
2962                 return -ENOMEM;
2963         rc = qeth_send_ipa_cmd(card, iob, qeth_query_setadapterparms_cb, NULL);
2964         return rc;
2965 }
2966
2967 static int qeth_query_ipassists_cb(struct qeth_card *card,
2968                 struct qeth_reply *reply, unsigned long data)
2969 {
2970         struct qeth_ipa_cmd *cmd;
2971
2972         QETH_DBF_TEXT(SETUP, 2, "qipasscb");
2973
2974         cmd = (struct qeth_ipa_cmd *) data;
2975
2976         switch (cmd->hdr.return_code) {
2977         case IPA_RC_NOTSUPP:
2978         case IPA_RC_L2_UNSUPPORTED_CMD:
2979                 QETH_DBF_TEXT(SETUP, 2, "ipaunsup");
2980                 card->options.ipa4.supported_funcs |= IPA_SETADAPTERPARMS;
2981                 card->options.ipa6.supported_funcs |= IPA_SETADAPTERPARMS;
2982                 return 0;
2983         default:
2984                 if (cmd->hdr.return_code) {
2985                         QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Unhandled rc=%#x\n",
2986                                          CARD_DEVID(card),
2987                                          cmd->hdr.return_code);
2988                         return 0;
2989                 }
2990         }
2991
2992         if (cmd->hdr.prot_version == QETH_PROT_IPV4) {
2993                 card->options.ipa4.supported_funcs = cmd->hdr.ipa_supported;
2994                 card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
2995         } else if (cmd->hdr.prot_version == QETH_PROT_IPV6) {
2996                 card->options.ipa6.supported_funcs = cmd->hdr.ipa_supported;
2997                 card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
2998         } else
2999                 QETH_DBF_MESSAGE(1, "IPA_CMD_QIPASSIST on device %x: Flawed LIC detected\n",
3000                                  CARD_DEVID(card));
3001         return 0;
3002 }
3003
3004 static int qeth_query_ipassists(struct qeth_card *card,
3005                                 enum qeth_prot_versions prot)
3006 {
3007         int rc;
3008         struct qeth_cmd_buffer *iob;
3009
3010         QETH_DBF_TEXT_(SETUP, 2, "qipassi%i", prot);
3011         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_QIPASSIST, prot);
3012         if (!iob)
3013                 return -ENOMEM;
3014         rc = qeth_send_ipa_cmd(card, iob, qeth_query_ipassists_cb, NULL);
3015         return rc;
3016 }
3017
3018 static int qeth_query_switch_attributes_cb(struct qeth_card *card,
3019                                 struct qeth_reply *reply, unsigned long data)
3020 {
3021         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
3022         struct qeth_query_switch_attributes *attrs;
3023         struct qeth_switch_info *sw_info;
3024
3025         QETH_CARD_TEXT(card, 2, "qswiatcb");
3026         if (qeth_setadpparms_inspect_rc(cmd))
3027                 return 0;
3028
3029         sw_info = (struct qeth_switch_info *)reply->param;
3030         attrs = &cmd->data.setadapterparms.data.query_switch_attributes;
3031         sw_info->capabilities = attrs->capabilities;
3032         sw_info->settings = attrs->settings;
3033         QETH_CARD_TEXT_(card, 2, "%04x%04x", sw_info->capabilities,
3034                         sw_info->settings);
3035         return 0;
3036 }
3037
3038 int qeth_query_switch_attributes(struct qeth_card *card,
3039                                  struct qeth_switch_info *sw_info)
3040 {
3041         struct qeth_cmd_buffer *iob;
3042
3043         QETH_CARD_TEXT(card, 2, "qswiattr");
3044         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES))
3045                 return -EOPNOTSUPP;
3046         if (!netif_carrier_ok(card->dev))
3047                 return -ENOMEDIUM;
3048         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_SWITCH_ATTRIBUTES,
3049                                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
3050         if (!iob)
3051                 return -ENOMEM;
3052         return qeth_send_ipa_cmd(card, iob,
3053                                 qeth_query_switch_attributes_cb, sw_info);
3054 }
3055
3056 static int qeth_query_setdiagass_cb(struct qeth_card *card,
3057                 struct qeth_reply *reply, unsigned long data)
3058 {
3059         struct qeth_ipa_cmd *cmd;
3060         __u16 rc;
3061
3062         cmd = (struct qeth_ipa_cmd *)data;
3063         rc = cmd->hdr.return_code;
3064         if (rc)
3065                 QETH_CARD_TEXT_(card, 2, "diagq:%x", rc);
3066         else
3067                 card->info.diagass_support = cmd->data.diagass.ext;
3068         return 0;
3069 }
3070
3071 static int qeth_query_setdiagass(struct qeth_card *card)
3072 {
3073         struct qeth_cmd_buffer *iob;
3074         struct qeth_ipa_cmd    *cmd;
3075
3076         QETH_DBF_TEXT(SETUP, 2, "qdiagass");
3077         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3078         if (!iob)
3079                 return -ENOMEM;
3080         cmd = __ipa_cmd(iob);
3081         cmd->data.diagass.subcmd_len = 16;
3082         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_QUERY;
3083         return qeth_send_ipa_cmd(card, iob, qeth_query_setdiagass_cb, NULL);
3084 }
3085
3086 static void qeth_get_trap_id(struct qeth_card *card, struct qeth_trap_id *tid)
3087 {
3088         unsigned long info = get_zeroed_page(GFP_KERNEL);
3089         struct sysinfo_2_2_2 *info222 = (struct sysinfo_2_2_2 *)info;
3090         struct sysinfo_3_2_2 *info322 = (struct sysinfo_3_2_2 *)info;
3091         struct ccw_dev_id ccwid;
3092         int level;
3093
3094         tid->chpid = card->info.chpid;
3095         ccw_device_get_id(CARD_RDEV(card), &ccwid);
3096         tid->ssid = ccwid.ssid;
3097         tid->devno = ccwid.devno;
3098         if (!info)
3099                 return;
3100         level = stsi(NULL, 0, 0, 0);
3101         if ((level >= 2) && (stsi(info222, 2, 2, 2) == 0))
3102                 tid->lparnr = info222->lpar_number;
3103         if ((level >= 3) && (stsi(info322, 3, 2, 2) == 0)) {
3104                 EBCASC(info322->vm[0].name, sizeof(info322->vm[0].name));
3105                 memcpy(tid->vmname, info322->vm[0].name, sizeof(tid->vmname));
3106         }
3107         free_page(info);
3108         return;
3109 }
3110
3111 static int qeth_hw_trap_cb(struct qeth_card *card,
3112                 struct qeth_reply *reply, unsigned long data)
3113 {
3114         struct qeth_ipa_cmd *cmd;
3115         __u16 rc;
3116
3117         cmd = (struct qeth_ipa_cmd *)data;
3118         rc = cmd->hdr.return_code;
3119         if (rc)
3120                 QETH_CARD_TEXT_(card, 2, "trapc:%x", rc);
3121         return 0;
3122 }
3123
3124 int qeth_hw_trap(struct qeth_card *card, enum qeth_diags_trap_action action)
3125 {
3126         struct qeth_cmd_buffer *iob;
3127         struct qeth_ipa_cmd *cmd;
3128
3129         QETH_DBF_TEXT(SETUP, 2, "diagtrap");
3130         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SET_DIAG_ASS, 0);
3131         if (!iob)
3132                 return -ENOMEM;
3133         cmd = __ipa_cmd(iob);
3134         cmd->data.diagass.subcmd_len = 80;
3135         cmd->data.diagass.subcmd = QETH_DIAGS_CMD_TRAP;
3136         cmd->data.diagass.type = 1;
3137         cmd->data.diagass.action = action;
3138         switch (action) {
3139         case QETH_DIAGS_TRAP_ARM:
3140                 cmd->data.diagass.options = 0x0003;
3141                 cmd->data.diagass.ext = 0x00010000 +
3142                         sizeof(struct qeth_trap_id);
3143                 qeth_get_trap_id(card,
3144                         (struct qeth_trap_id *)cmd->data.diagass.cdata);
3145                 break;
3146         case QETH_DIAGS_TRAP_DISARM:
3147                 cmd->data.diagass.options = 0x0001;
3148                 break;
3149         case QETH_DIAGS_TRAP_CAPTURE:
3150                 break;
3151         }
3152         return qeth_send_ipa_cmd(card, iob, qeth_hw_trap_cb, NULL);
3153 }
3154 EXPORT_SYMBOL_GPL(qeth_hw_trap);
3155
3156 static int qeth_check_qdio_errors(struct qeth_card *card,
3157                                   struct qdio_buffer *buf,
3158                                   unsigned int qdio_error,
3159                                   const char *dbftext)
3160 {
3161         if (qdio_error) {
3162                 QETH_CARD_TEXT(card, 2, dbftext);
3163                 QETH_CARD_TEXT_(card, 2, " F15=%02X",
3164                                buf->element[15].sflags);
3165                 QETH_CARD_TEXT_(card, 2, " F14=%02X",
3166                                buf->element[14].sflags);
3167                 QETH_CARD_TEXT_(card, 2, " qerr=%X", qdio_error);
3168                 if ((buf->element[15].sflags) == 0x12) {
3169                         card->stats.rx_dropped++;
3170                         return 0;
3171                 } else
3172                         return 1;
3173         }
3174         return 0;
3175 }
3176
3177 static void qeth_queue_input_buffer(struct qeth_card *card, int index)
3178 {
3179         struct qeth_qdio_q *queue = card->qdio.in_q;
3180         struct list_head *lh;
3181         int count;
3182         int i;
3183         int rc;
3184         int newcount = 0;
3185
3186         count = (index < queue->next_buf_to_init)?
3187                 card->qdio.in_buf_pool.buf_count -
3188                 (queue->next_buf_to_init - index) :
3189                 card->qdio.in_buf_pool.buf_count -
3190                 (queue->next_buf_to_init + QDIO_MAX_BUFFERS_PER_Q - index);
3191         /* only requeue at a certain threshold to avoid SIGAs */
3192         if (count >= QETH_IN_BUF_REQUEUE_THRESHOLD(card)) {
3193                 for (i = queue->next_buf_to_init;
3194                      i < queue->next_buf_to_init + count; ++i) {
3195                         if (qeth_init_input_buffer(card,
3196                                 &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q])) {
3197                                 break;
3198                         } else {
3199                                 newcount++;
3200                         }
3201                 }
3202
3203                 if (newcount < count) {
3204                         /* we are in memory shortage so we switch back to
3205                            traditional skb allocation and drop packages */
3206                         atomic_set(&card->force_alloc_skb, 3);
3207                         count = newcount;
3208                 } else {
3209                         atomic_add_unless(&card->force_alloc_skb, -1, 0);
3210                 }
3211
3212                 if (!count) {
3213                         i = 0;
3214                         list_for_each(lh, &card->qdio.in_buf_pool.entry_list)
3215                                 i++;
3216                         if (i == card->qdio.in_buf_pool.buf_count) {
3217                                 QETH_CARD_TEXT(card, 2, "qsarbw");
3218                                 card->reclaim_index = index;
3219                                 schedule_delayed_work(
3220                                         &card->buffer_reclaim_work,
3221                                         QETH_RECLAIM_WORK_TIME);
3222                         }
3223                         return;
3224                 }
3225
3226                 /*
3227                  * according to old code it should be avoided to requeue all
3228                  * 128 buffers in order to benefit from PCI avoidance.
3229                  * this function keeps at least one buffer (the buffer at
3230                  * 'index') un-requeued -> this buffer is the first buffer that
3231                  * will be requeued the next time
3232                  */
3233                 if (card->options.performance_stats) {
3234                         card->perf_stats.inbound_do_qdio_cnt++;
3235                         card->perf_stats.inbound_do_qdio_start_time =
3236                                 qeth_get_micros();
3237                 }
3238                 rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0,
3239                              queue->next_buf_to_init, count);
3240                 if (card->options.performance_stats)
3241                         card->perf_stats.inbound_do_qdio_time +=
3242                                 qeth_get_micros() -
3243                                 card->perf_stats.inbound_do_qdio_start_time;
3244                 if (rc) {
3245                         QETH_CARD_TEXT(card, 2, "qinberr");
3246                 }
3247                 queue->next_buf_to_init = (queue->next_buf_to_init + count) %
3248                                           QDIO_MAX_BUFFERS_PER_Q;
3249         }
3250 }
3251
3252 static void qeth_buffer_reclaim_work(struct work_struct *work)
3253 {
3254         struct qeth_card *card = container_of(work, struct qeth_card,
3255                 buffer_reclaim_work.work);
3256
3257         QETH_CARD_TEXT_(card, 2, "brw:%x", card->reclaim_index);
3258         qeth_queue_input_buffer(card, card->reclaim_index);
3259 }
3260
3261 static void qeth_handle_send_error(struct qeth_card *card,
3262                 struct qeth_qdio_out_buffer *buffer, unsigned int qdio_err)
3263 {
3264         int sbalf15 = buffer->buffer->element[15].sflags;
3265
3266         QETH_CARD_TEXT(card, 6, "hdsnderr");
3267         if (card->info.type == QETH_CARD_TYPE_IQD) {
3268                 if (sbalf15 == 0) {
3269                         qdio_err = 0;
3270                 } else {
3271                         qdio_err = 1;
3272                 }
3273         }
3274         qeth_check_qdio_errors(card, buffer->buffer, qdio_err, "qouterr");
3275
3276         if (!qdio_err)
3277                 return;
3278
3279         if ((sbalf15 >= 15) && (sbalf15 <= 31))
3280                 return;
3281
3282         QETH_CARD_TEXT(card, 1, "lnkfail");
3283         QETH_CARD_TEXT_(card, 1, "%04x %02x",
3284                        (u16)qdio_err, (u8)sbalf15);
3285 }
3286
3287 /**
3288  * qeth_prep_flush_pack_buffer - Prepares flushing of a packing buffer.
3289  * @queue: queue to check for packing buffer
3290  *
3291  * Returns number of buffers that were prepared for flush.
3292  */
3293 static int qeth_prep_flush_pack_buffer(struct qeth_qdio_out_q *queue)
3294 {
3295         struct qeth_qdio_out_buffer *buffer;
3296
3297         buffer = queue->bufs[queue->next_buf_to_fill];
3298         if ((atomic_read(&buffer->state) == QETH_QDIO_BUF_EMPTY) &&
3299             (buffer->next_element_to_fill > 0)) {
3300                 /* it's a packing buffer */
3301                 atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
3302                 queue->next_buf_to_fill =
3303                         (queue->next_buf_to_fill + 1) % QDIO_MAX_BUFFERS_PER_Q;
3304                 return 1;
3305         }
3306         return 0;
3307 }
3308
3309 /*
3310  * Switched to packing state if the number of used buffers on a queue
3311  * reaches a certain limit.
3312  */
3313 static void qeth_switch_to_packing_if_needed(struct qeth_qdio_out_q *queue)
3314 {
3315         if (!queue->do_pack) {
3316                 if (atomic_read(&queue->used_buffers)
3317                     >= QETH_HIGH_WATERMARK_PACK){
3318                         /* switch non-PACKING -> PACKING */
3319                         QETH_CARD_TEXT(queue->card, 6, "np->pack");
3320                         if (queue->card->options.performance_stats)
3321                                 queue->card->perf_stats.sc_dp_p++;
3322                         queue->do_pack = 1;
3323                 }
3324         }
3325 }
3326
3327 /*
3328  * Switches from packing to non-packing mode. If there is a packing
3329  * buffer on the queue this buffer will be prepared to be flushed.
3330  * In that case 1 is returned to inform the caller. If no buffer
3331  * has to be flushed, zero is returned.
3332  */
3333 static int qeth_switch_to_nonpacking_if_needed(struct qeth_qdio_out_q *queue)
3334 {
3335         if (queue->do_pack) {
3336                 if (atomic_read(&queue->used_buffers)
3337                     <= QETH_LOW_WATERMARK_PACK) {
3338                         /* switch PACKING -> non-PACKING */
3339                         QETH_CARD_TEXT(queue->card, 6, "pack->np");
3340                         if (queue->card->options.performance_stats)
3341                                 queue->card->perf_stats.sc_p_dp++;
3342                         queue->do_pack = 0;
3343                         return qeth_prep_flush_pack_buffer(queue);
3344                 }
3345         }
3346         return 0;
3347 }
3348
3349 static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
3350                                int count)
3351 {
3352         struct qeth_qdio_out_buffer *buf;
3353         int rc;
3354         int i;
3355         unsigned int qdio_flags;
3356
3357         for (i = index; i < index + count; ++i) {
3358                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3359                 buf = queue->bufs[bidx];
3360                 buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
3361                                 SBAL_EFLAGS_LAST_ENTRY;
3362
3363                 if (queue->bufstates)
3364                         queue->bufstates[bidx].user = buf;
3365
3366                 if (queue->card->info.type == QETH_CARD_TYPE_IQD)
3367                         continue;
3368
3369                 if (!queue->do_pack) {
3370                         if ((atomic_read(&queue->used_buffers) >=
3371                                 (QETH_HIGH_WATERMARK_PACK -
3372                                  QETH_WATERMARK_PACK_FUZZ)) &&
3373                             !atomic_read(&queue->set_pci_flags_count)) {
3374                                 /* it's likely that we'll go to packing
3375                                  * mode soon */
3376                                 atomic_inc(&queue->set_pci_flags_count);
3377                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3378                         }
3379                 } else {
3380                         if (!atomic_read(&queue->set_pci_flags_count)) {
3381                                 /*
3382                                  * there's no outstanding PCI any more, so we
3383                                  * have to request a PCI to be sure the the PCI
3384                                  * will wake at some time in the future then we
3385                                  * can flush packed buffers that might still be
3386                                  * hanging around, which can happen if no
3387                                  * further send was requested by the stack
3388                                  */
3389                                 atomic_inc(&queue->set_pci_flags_count);
3390                                 buf->buffer->element[0].sflags |= SBAL_SFLAGS0_PCI_REQ;
3391                         }
3392                 }
3393         }
3394
3395         netif_trans_update(queue->card->dev);
3396         if (queue->card->options.performance_stats) {
3397                 queue->card->perf_stats.outbound_do_qdio_cnt++;
3398                 queue->card->perf_stats.outbound_do_qdio_start_time =
3399                         qeth_get_micros();
3400         }
3401         qdio_flags = QDIO_FLAG_SYNC_OUTPUT;
3402         if (atomic_read(&queue->set_pci_flags_count))
3403                 qdio_flags |= QDIO_FLAG_PCI_OUT;
3404         atomic_add(count, &queue->used_buffers);
3405
3406         rc = do_QDIO(CARD_DDEV(queue->card), qdio_flags,
3407                      queue->queue_no, index, count);
3408         if (queue->card->options.performance_stats)
3409                 queue->card->perf_stats.outbound_do_qdio_time +=
3410                         qeth_get_micros() -
3411                         queue->card->perf_stats.outbound_do_qdio_start_time;
3412         if (rc) {
3413                 queue->card->stats.tx_errors += count;
3414                 /* ignore temporary SIGA errors without busy condition */
3415                 if (rc == -ENOBUFS)
3416                         return;
3417                 QETH_CARD_TEXT(queue->card, 2, "flushbuf");
3418                 QETH_CARD_TEXT_(queue->card, 2, " q%d", queue->queue_no);
3419                 QETH_CARD_TEXT_(queue->card, 2, " idx%d", index);
3420                 QETH_CARD_TEXT_(queue->card, 2, " c%d", count);
3421                 QETH_CARD_TEXT_(queue->card, 2, " err%d", rc);
3422
3423                 /* this must not happen under normal circumstances. if it
3424                  * happens something is really wrong -> recover */
3425                 qeth_schedule_recovery(queue->card);
3426                 return;
3427         }
3428         if (queue->card->options.performance_stats)
3429                 queue->card->perf_stats.bufs_sent += count;
3430 }
3431
3432 static void qeth_check_outbound_queue(struct qeth_qdio_out_q *queue)
3433 {
3434         int index;
3435         int flush_cnt = 0;
3436         int q_was_packing = 0;
3437
3438         /*
3439          * check if weed have to switch to non-packing mode or if
3440          * we have to get a pci flag out on the queue
3441          */
3442         if ((atomic_read(&queue->used_buffers) <= QETH_LOW_WATERMARK_PACK) ||
3443             !atomic_read(&queue->set_pci_flags_count)) {
3444                 if (atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH) ==
3445                                 QETH_OUT_Q_UNLOCKED) {
3446                         /*
3447                          * If we get in here, there was no action in
3448                          * do_send_packet. So, we check if there is a
3449                          * packing buffer to be flushed here.
3450                          */
3451                         netif_stop_queue(queue->card->dev);
3452                         index = queue->next_buf_to_fill;
3453                         q_was_packing = queue->do_pack;
3454                         /* queue->do_pack may change */
3455                         barrier();
3456                         flush_cnt += qeth_switch_to_nonpacking_if_needed(queue);
3457                         if (!flush_cnt &&
3458                             !atomic_read(&queue->set_pci_flags_count))
3459                                 flush_cnt += qeth_prep_flush_pack_buffer(queue);
3460                         if (queue->card->options.performance_stats &&
3461                             q_was_packing)
3462                                 queue->card->perf_stats.bufs_sent_pack +=
3463                                         flush_cnt;
3464                         if (flush_cnt)
3465                                 qeth_flush_buffers(queue, index, flush_cnt);
3466                         atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
3467                 }
3468         }
3469 }
3470
3471 static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
3472                                  unsigned long card_ptr)
3473 {
3474         struct qeth_card *card = (struct qeth_card *)card_ptr;
3475
3476         if (card->dev->flags & IFF_UP)
3477                 napi_schedule(&card->napi);
3478 }
3479
3480 int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
3481 {
3482         int rc;
3483
3484         if (card->options.cq ==  QETH_CQ_NOTAVAILABLE) {
3485                 rc = -1;
3486                 goto out;
3487         } else {
3488                 if (card->options.cq == cq) {
3489                         rc = 0;
3490                         goto out;
3491                 }
3492
3493                 if (card->state != CARD_STATE_DOWN &&
3494                     card->state != CARD_STATE_RECOVER) {
3495                         rc = -1;
3496                         goto out;
3497                 }
3498
3499                 qeth_free_qdio_buffers(card);
3500                 card->options.cq = cq;
3501                 rc = 0;
3502         }
3503 out:
3504         return rc;
3505
3506 }
3507 EXPORT_SYMBOL_GPL(qeth_configure_cq);
3508
3509 static void qeth_qdio_cq_handler(struct qeth_card *card, unsigned int qdio_err,
3510                                  unsigned int queue, int first_element,
3511                                  int count)
3512 {
3513         struct qeth_qdio_q *cq = card->qdio.c_q;
3514         int i;
3515         int rc;
3516
3517         if (!qeth_is_cq(card, queue))
3518                 goto out;
3519
3520         QETH_CARD_TEXT_(card, 5, "qcqhe%d", first_element);
3521         QETH_CARD_TEXT_(card, 5, "qcqhc%d", count);
3522         QETH_CARD_TEXT_(card, 5, "qcqherr%d", qdio_err);
3523
3524         if (qdio_err) {
3525                 netif_stop_queue(card->dev);
3526                 qeth_schedule_recovery(card);
3527                 goto out;
3528         }
3529
3530         if (card->options.performance_stats) {
3531                 card->perf_stats.cq_cnt++;
3532                 card->perf_stats.cq_start_time = qeth_get_micros();
3533         }
3534
3535         for (i = first_element; i < first_element + count; ++i) {
3536                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3537                 struct qdio_buffer *buffer = cq->qdio_bufs[bidx];
3538                 int e = 0;
3539
3540                 while ((e < QDIO_MAX_ELEMENTS_PER_BUFFER) &&
3541                        buffer->element[e].addr) {
3542                         unsigned long phys_aob_addr;
3543
3544                         phys_aob_addr = (unsigned long) buffer->element[e].addr;
3545                         qeth_qdio_handle_aob(card, phys_aob_addr);
3546                         ++e;
3547                 }
3548                 qeth_scrub_qdio_buffer(buffer, QDIO_MAX_ELEMENTS_PER_BUFFER);
3549         }
3550         rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, queue,
3551                     card->qdio.c_q->next_buf_to_init,
3552                     count);
3553         if (rc) {
3554                 dev_warn(&card->gdev->dev,
3555                         "QDIO reported an error, rc=%i\n", rc);
3556                 QETH_CARD_TEXT(card, 2, "qcqherr");
3557         }
3558         card->qdio.c_q->next_buf_to_init = (card->qdio.c_q->next_buf_to_init
3559                                    + count) % QDIO_MAX_BUFFERS_PER_Q;
3560
3561         netif_wake_queue(card->dev);
3562
3563         if (card->options.performance_stats) {
3564                 int delta_t = qeth_get_micros();
3565                 delta_t -= card->perf_stats.cq_start_time;
3566                 card->perf_stats.cq_time += delta_t;
3567         }
3568 out:
3569         return;
3570 }
3571
3572 static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
3573                                     unsigned int qdio_err, int queue,
3574                                     int first_elem, int count,
3575                                     unsigned long card_ptr)
3576 {
3577         struct qeth_card *card = (struct qeth_card *)card_ptr;
3578
3579         QETH_CARD_TEXT_(card, 2, "qihq%d", queue);
3580         QETH_CARD_TEXT_(card, 2, "qiec%d", qdio_err);
3581
3582         if (qeth_is_cq(card, queue))
3583                 qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
3584         else if (qdio_err)
3585                 qeth_schedule_recovery(card);
3586 }
3587
3588 static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
3589                                      unsigned int qdio_error, int __queue,
3590                                      int first_element, int count,
3591                                      unsigned long card_ptr)
3592 {
3593         struct qeth_card *card        = (struct qeth_card *) card_ptr;
3594         struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
3595         struct qeth_qdio_out_buffer *buffer;
3596         int i;
3597
3598         QETH_CARD_TEXT(card, 6, "qdouhdl");
3599         if (qdio_error & QDIO_ERROR_FATAL) {
3600                 QETH_CARD_TEXT(card, 2, "achkcond");
3601                 netif_stop_queue(card->dev);
3602                 qeth_schedule_recovery(card);
3603                 return;
3604         }
3605         if (card->options.performance_stats) {
3606                 card->perf_stats.outbound_handler_cnt++;
3607                 card->perf_stats.outbound_handler_start_time =
3608                         qeth_get_micros();
3609         }
3610         for (i = first_element; i < (first_element + count); ++i) {
3611                 int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
3612                 buffer = queue->bufs[bidx];
3613                 qeth_handle_send_error(card, buffer, qdio_error);
3614
3615                 if (queue->bufstates &&
3616                     (queue->bufstates[bidx].flags &
3617                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
3618                         WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
3619
3620                         if (atomic_cmpxchg(&buffer->state,
3621                                            QETH_QDIO_BUF_PRIMED,
3622                                            QETH_QDIO_BUF_PENDING) ==
3623                                 QETH_QDIO_BUF_PRIMED) {
3624                                 qeth_notify_skbs(queue, buffer,
3625                                                  TX_NOTIFY_PENDING);
3626                         }
3627                         QETH_CARD_TEXT_(queue->card, 5, "pel%d", bidx);
3628
3629                         /* prepare the queue slot for re-use: */
3630                         qeth_scrub_qdio_buffer(buffer->buffer,
3631                                                QETH_MAX_BUFFER_ELEMENTS(card));
3632                         if (qeth_init_qdio_out_buf(queue, bidx)) {
3633                                 QETH_CARD_TEXT(card, 2, "outofbuf");
3634                                 qeth_schedule_recovery(card);
3635                         }
3636                 } else {
3637                         if (card->options.cq == QETH_CQ_ENABLED) {
3638                                 enum iucv_tx_notify n;
3639
3640                                 n = qeth_compute_cq_notification(
3641                                         buffer->buffer->element[15].sflags, 0);
3642                                 qeth_notify_skbs(queue, buffer, n);
3643                         }
3644
3645                         qeth_clear_output_buffer(queue, buffer);
3646                 }
3647                 qeth_cleanup_handled_pending(queue, bidx, 0);
3648         }
3649         atomic_sub(count, &queue->used_buffers);
3650         /* check if we need to do something on this outbound queue */
3651         if (card->info.type != QETH_CARD_TYPE_IQD)
3652                 qeth_check_outbound_queue(queue);
3653
3654         netif_wake_queue(queue->card->dev);
3655         if (card->options.performance_stats)
3656                 card->perf_stats.outbound_handler_time += qeth_get_micros() -
3657                         card->perf_stats.outbound_handler_start_time;
3658 }
3659
3660 /* We cannot use outbound queue 3 for unicast packets on HiperSockets */
3661 static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
3662 {
3663         if ((card->info.type == QETH_CARD_TYPE_IQD) && (queue_num == 3))
3664                 return 2;
3665         return queue_num;
3666 }
3667
3668 /**
3669  * Note: Function assumes that we have 4 outbound queues.
3670  */
3671 int qeth_get_priority_queue(struct qeth_card *card, struct sk_buff *skb,
3672                             int ipv)
3673 {
3674         __be16 *tci;
3675         u8 tos;
3676
3677         switch (card->qdio.do_prio_queueing) {
3678         case QETH_PRIO_Q_ING_TOS:
3679         case QETH_PRIO_Q_ING_PREC:
3680                 switch (ipv) {
3681                 case 4:
3682                         tos = ipv4_get_dsfield(ip_hdr(skb));
3683                         break;
3684                 case 6:
3685                         tos = ipv6_get_dsfield(ipv6_hdr(skb));
3686                         break;
3687                 default:
3688                         return card->qdio.default_out_queue;
3689                 }
3690                 if (card->qdio.do_prio_queueing == QETH_PRIO_Q_ING_PREC)
3691                         return qeth_cut_iqd_prio(card, ~tos >> 6 & 3);
3692                 if (tos & IPTOS_MINCOST)
3693                         return qeth_cut_iqd_prio(card, 3);
3694                 if (tos & IPTOS_RELIABILITY)
3695                         return 2;
3696                 if (tos & IPTOS_THROUGHPUT)
3697                         return 1;
3698                 if (tos & IPTOS_LOWDELAY)
3699                         return 0;
3700                 break;
3701         case QETH_PRIO_Q_ING_SKB:
3702                 if (skb->priority > 5)
3703                         return 0;
3704                 return qeth_cut_iqd_prio(card, ~skb->priority >> 1 & 3);
3705         case QETH_PRIO_Q_ING_VLAN:
3706                 tci = &((struct ethhdr *)skb->data)->h_proto;
3707                 if (be16_to_cpu(*tci) == ETH_P_8021Q)
3708                         return qeth_cut_iqd_prio(card,
3709                         ~be16_to_cpu(*(tci + 1)) >> (VLAN_PRIO_SHIFT + 1) & 3);
3710                 break;
3711         default:
3712                 break;
3713         }
3714         return card->qdio.default_out_queue;
3715 }
3716 EXPORT_SYMBOL_GPL(qeth_get_priority_queue);
3717
3718 /**
3719  * qeth_get_elements_for_frags() -      find number of SBALEs for skb frags.
3720  * @skb:                                SKB address
3721  *
3722  * Returns the number of pages, and thus QDIO buffer elements, needed to cover
3723  * fragmented part of the SKB. Returns zero for linear SKB.
3724  */
3725 static int qeth_get_elements_for_frags(struct sk_buff *skb)
3726 {
3727         int cnt, elements = 0;
3728
3729         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3730                 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[cnt];
3731
3732                 elements += qeth_get_elements_for_range(
3733                         (addr_t)skb_frag_address(frag),
3734                         (addr_t)skb_frag_address(frag) + skb_frag_size(frag));
3735         }
3736         return elements;
3737 }
3738
3739 /**
3740  * qeth_count_elements() -      Counts the number of QDIO buffer elements needed
3741  *                              to transmit an skb.
3742  * @skb:                        the skb to operate on.
3743  * @data_offset:                skip this part of the skb's linear data
3744  *
3745  * Returns the number of pages, and thus QDIO buffer elements, needed to map the
3746  * skb's data (both its linear part and paged fragments).
3747  */
3748 unsigned int qeth_count_elements(struct sk_buff *skb, unsigned int data_offset)
3749 {
3750         unsigned int elements = qeth_get_elements_for_frags(skb);
3751         addr_t end = (addr_t)skb->data + skb_headlen(skb);
3752         addr_t start = (addr_t)skb->data + data_offset;
3753
3754         if (start != end)
3755                 elements += qeth_get_elements_for_range(start, end);
3756         return elements;
3757 }
3758 EXPORT_SYMBOL_GPL(qeth_count_elements);
3759
3760 #define QETH_HDR_CACHE_OBJ_SIZE         (sizeof(struct qeth_hdr_tso) + \
3761                                          MAX_TCP_HEADER)
3762
3763 /**
3764  * qeth_add_hw_header() - add a HW header to an skb.
3765  * @skb: skb that the HW header should be added to.
3766  * @hdr: double pointer to a qeth_hdr. When returning with >= 0,
3767  *       it contains a valid pointer to a qeth_hdr.
3768  * @hdr_len: length of the HW header.
3769  * @proto_len: length of protocol headers that need to be in same page as the
3770  *             HW header.
3771  *
3772  * Returns the pushed length. If the header can't be pushed on
3773  * (eg. because it would cross a page boundary), it is allocated from
3774  * the cache instead and 0 is returned.
3775  * The number of needed buffer elements is returned in @elements.
3776  * Error to create the hdr is indicated by returning with < 0.
3777  */
3778 int qeth_add_hw_header(struct qeth_card *card, struct sk_buff *skb,
3779                        struct qeth_hdr **hdr, unsigned int hdr_len,
3780                        unsigned int proto_len, unsigned int *elements)
3781 {
3782         const unsigned int max_elements = QETH_MAX_BUFFER_ELEMENTS(card);
3783         const unsigned int contiguous = proto_len ? proto_len : 1;
3784         unsigned int __elements;
3785         addr_t start, end;
3786         bool push_ok;
3787         int rc;
3788
3789 check_layout:
3790         start = (addr_t)skb->data - hdr_len;
3791         end = (addr_t)skb->data;
3792
3793         if (qeth_get_elements_for_range(start, end + contiguous) == 1) {
3794                 /* Push HW header into same page as first protocol header. */
3795                 push_ok = true;
3796                 /* ... but TSO always needs a separate element for headers: */
3797                 if (skb_is_gso(skb))
3798                         __elements = 1 + qeth_count_elements(skb, proto_len);
3799                 else
3800                         __elements = qeth_count_elements(skb, 0);
3801         } else if (!proto_len && qeth_get_elements_for_range(start, end) == 1) {
3802                 /* Push HW header into a new page. */
3803                 push_ok = true;
3804                 __elements = 1 + qeth_count_elements(skb, 0);
3805         } else {
3806                 /* Use header cache, copy protocol headers up. */
3807                 push_ok = false;
3808                 __elements = 1 + qeth_count_elements(skb, proto_len);
3809         }
3810
3811         /* Compress skb to fit into one IO buffer: */
3812         if (__elements > max_elements) {
3813                 if (!skb_is_nonlinear(skb)) {
3814                         /* Drop it, no easy way of shrinking it further. */
3815                         QETH_DBF_MESSAGE(2, "Dropped an oversized skb (Max Elements=%u / Actual=%u / Length=%u).\n",
3816                                          max_elements, __elements, skb->len);
3817                         return -E2BIG;
3818                 }
3819
3820                 rc = skb_linearize(skb);
3821                 if (card->options.performance_stats) {
3822                         if (rc)
3823                                 card->perf_stats.tx_linfail++;
3824                         else
3825                                 card->perf_stats.tx_lin++;
3826                 }
3827                 if (rc)
3828                         return rc;
3829
3830                 /* Linearization changed the layout, re-evaluate: */
3831                 goto check_layout;
3832         }
3833
3834         *elements = __elements;
3835         /* Add the header: */
3836         if (push_ok) {
3837                 *hdr = skb_push(skb, hdr_len);
3838                 return hdr_len;
3839         }
3840         /* fall back */
3841         if (hdr_len + proto_len > QETH_HDR_CACHE_OBJ_SIZE)
3842                 return -E2BIG;
3843         *hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
3844         if (!*hdr)
3845                 return -ENOMEM;
3846         /* Copy protocol headers behind HW header: */
3847         skb_copy_from_linear_data(skb, ((char *)*hdr) + hdr_len, proto_len);
3848         return 0;
3849 }
3850 EXPORT_SYMBOL_GPL(qeth_add_hw_header);
3851
3852 static void __qeth_fill_buffer(struct sk_buff *skb,
3853                                struct qeth_qdio_out_buffer *buf,
3854                                bool is_first_elem, unsigned int offset)
3855 {
3856         struct qdio_buffer *buffer = buf->buffer;
3857         int element = buf->next_element_to_fill;
3858         int length = skb_headlen(skb) - offset;
3859         char *data = skb->data + offset;
3860         int length_here, cnt;
3861
3862         /* map linear part into buffer element(s) */
3863         while (length > 0) {
3864                 /* length_here is the remaining amount of data in this page */
3865                 length_here = PAGE_SIZE - ((unsigned long) data % PAGE_SIZE);
3866                 if (length < length_here)
3867                         length_here = length;
3868
3869                 buffer->element[element].addr = data;
3870                 buffer->element[element].length = length_here;
3871                 length -= length_here;
3872                 if (is_first_elem) {
3873                         is_first_elem = false;
3874                         if (length || skb_is_nonlinear(skb))
3875                                 /* skb needs additional elements */
3876                                 buffer->element[element].eflags =
3877                                         SBAL_EFLAGS_FIRST_FRAG;
3878                         else
3879                                 buffer->element[element].eflags = 0;
3880                 } else {
3881                         buffer->element[element].eflags =
3882                                 SBAL_EFLAGS_MIDDLE_FRAG;
3883                 }
3884                 data += length_here;
3885                 element++;
3886         }
3887
3888         /* map page frags into buffer element(s) */
3889         for (cnt = 0; cnt < skb_shinfo(skb)->nr_frags; cnt++) {
3890                 skb_frag_t *frag = &skb_shinfo(skb)->frags[cnt];
3891
3892                 data = skb_frag_address(frag);
3893                 length = skb_frag_size(frag);
3894                 while (length > 0) {
3895                         length_here = PAGE_SIZE -
3896                                 ((unsigned long) data % PAGE_SIZE);
3897                         if (length < length_here)
3898                                 length_here = length;
3899
3900                         buffer->element[element].addr = data;
3901                         buffer->element[element].length = length_here;
3902                         buffer->element[element].eflags =
3903                                 SBAL_EFLAGS_MIDDLE_FRAG;
3904                         length -= length_here;
3905                         data += length_here;
3906                         element++;
3907                 }
3908         }
3909
3910         if (buffer->element[element - 1].eflags)
3911                 buffer->element[element - 1].eflags = SBAL_EFLAGS_LAST_FRAG;
3912         buf->next_element_to_fill = element;
3913 }
3914
3915 /**
3916  * qeth_fill_buffer() - map skb into an output buffer
3917  * @queue:      QDIO queue to submit the buffer on
3918  * @buf:        buffer to transport the skb
3919  * @skb:        skb to map into the buffer
3920  * @hdr:        qeth_hdr for this skb. Either at skb->data, or allocated
3921  *              from qeth_core_header_cache.
3922  * @offset:     when mapping the skb, start at skb->data + offset
3923  * @hd_len:     if > 0, build a dedicated header element of this size
3924  */
3925 static int qeth_fill_buffer(struct qeth_qdio_out_q *queue,
3926                             struct qeth_qdio_out_buffer *buf,
3927                             struct sk_buff *skb, struct qeth_hdr *hdr,
3928                             unsigned int offset, unsigned int hd_len)
3929 {
3930         struct qdio_buffer *buffer = buf->buffer;
3931         bool is_first_elem = true;
3932         int flush_cnt = 0;
3933
3934         __skb_queue_tail(&buf->skb_list, skb);
3935
3936         /* build dedicated header element */
3937         if (hd_len) {
3938                 int element = buf->next_element_to_fill;
3939                 is_first_elem = false;
3940
3941                 buffer->element[element].addr = hdr;
3942                 buffer->element[element].length = hd_len;
3943                 buffer->element[element].eflags = SBAL_EFLAGS_FIRST_FRAG;
3944                 /* remember to free cache-allocated qeth_hdr: */
3945                 buf->is_header[element] = ((void *)hdr != skb->data);
3946                 buf->next_element_to_fill++;
3947         }
3948
3949         __qeth_fill_buffer(skb, buf, is_first_elem, offset);
3950
3951         if (!queue->do_pack) {
3952                 QETH_CARD_TEXT(queue->card, 6, "fillbfnp");
3953                 /* set state to PRIMED -> will be flushed */
3954                 atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3955                 flush_cnt = 1;
3956         } else {
3957                 QETH_CARD_TEXT(queue->card, 6, "fillbfpa");
3958                 if (queue->card->options.performance_stats)
3959                         queue->card->perf_stats.skbs_sent_pack++;
3960                 if (buf->next_element_to_fill >=
3961                                 QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
3962                         /*
3963                          * packed buffer if full -> set state PRIMED
3964                          * -> will be flushed
3965                          */
3966                         atomic_set(&buf->state, QETH_QDIO_BUF_PRIMED);
3967                         flush_cnt = 1;
3968                 }
3969         }
3970         return flush_cnt;
3971 }
3972
3973 int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue, struct sk_buff *skb,
3974                              struct qeth_hdr *hdr, unsigned int offset,
3975                              unsigned int hd_len)
3976 {
3977         int index = queue->next_buf_to_fill;
3978         struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
3979
3980         /*
3981          * check if buffer is empty to make sure that we do not 'overtake'
3982          * ourselves and try to fill a buffer that is already primed
3983          */
3984         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY)
3985                 return -EBUSY;
3986         queue->next_buf_to_fill = (index + 1) % QDIO_MAX_BUFFERS_PER_Q;
3987         qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
3988         qeth_flush_buffers(queue, index, 1);
3989         return 0;
3990 }
3991 EXPORT_SYMBOL_GPL(qeth_do_send_packet_fast);
3992
3993 int qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue,
3994                         struct sk_buff *skb, struct qeth_hdr *hdr,
3995                         unsigned int offset, unsigned int hd_len,
3996                         int elements_needed)
3997 {
3998         struct qeth_qdio_out_buffer *buffer;
3999         int start_index;
4000         int flush_count = 0;
4001         int do_pack = 0;
4002         int tmp;
4003         int rc = 0;
4004
4005         /* spin until we get the queue ... */
4006         while (atomic_cmpxchg(&queue->state, QETH_OUT_Q_UNLOCKED,
4007                               QETH_OUT_Q_LOCKED) != QETH_OUT_Q_UNLOCKED);
4008         start_index = queue->next_buf_to_fill;
4009         buffer = queue->bufs[queue->next_buf_to_fill];
4010         /*
4011          * check if buffer is empty to make sure that we do not 'overtake'
4012          * ourselves and try to fill a buffer that is already primed
4013          */
4014         if (atomic_read(&buffer->state) != QETH_QDIO_BUF_EMPTY) {
4015                 atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
4016                 return -EBUSY;
4017         }
4018         /* check if we need to switch packing state of this queue */
4019         qeth_switch_to_packing_if_needed(queue);
4020         if (queue->do_pack) {
4021                 do_pack = 1;
4022                 /* does packet fit in current buffer? */
4023                 if ((QETH_MAX_BUFFER_ELEMENTS(card) -
4024                     buffer->next_element_to_fill) < elements_needed) {
4025                         /* ... no -> set state PRIMED */
4026                         atomic_set(&buffer->state, QETH_QDIO_BUF_PRIMED);
4027                         flush_count++;
4028                         queue->next_buf_to_fill =
4029                                 (queue->next_buf_to_fill + 1) %
4030                                 QDIO_MAX_BUFFERS_PER_Q;
4031                         buffer = queue->bufs[queue->next_buf_to_fill];
4032                         /* we did a step forward, so check buffer state
4033                          * again */
4034                         if (atomic_read(&buffer->state) !=
4035                             QETH_QDIO_BUF_EMPTY) {
4036                                 qeth_flush_buffers(queue, start_index,
4037                                                            flush_count);
4038                                 atomic_set(&queue->state,
4039                                                 QETH_OUT_Q_UNLOCKED);
4040                                 rc = -EBUSY;
4041                                 goto out;
4042                         }
4043                 }
4044         }
4045         tmp = qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len);
4046         queue->next_buf_to_fill = (queue->next_buf_to_fill + tmp) %
4047                                   QDIO_MAX_BUFFERS_PER_Q;
4048         flush_count += tmp;
4049         if (flush_count)
4050                 qeth_flush_buffers(queue, start_index, flush_count);
4051         else if (!atomic_read(&queue->set_pci_flags_count))
4052                 atomic_xchg(&queue->state, QETH_OUT_Q_LOCKED_FLUSH);
4053         /*
4054          * queue->state will go from LOCKED -> UNLOCKED or from
4055          * LOCKED_FLUSH -> LOCKED if output_handler wanted to 'notify' us
4056          * (switch packing state or flush buffer to get another pci flag out).
4057          * In that case we will enter this loop
4058          */
4059         while (atomic_dec_return(&queue->state)) {
4060                 start_index = queue->next_buf_to_fill;
4061                 /* check if we can go back to non-packing state */
4062                 tmp = qeth_switch_to_nonpacking_if_needed(queue);
4063                 /*
4064                  * check if we need to flush a packing buffer to get a pci
4065                  * flag out on the queue
4066                  */
4067                 if (!tmp && !atomic_read(&queue->set_pci_flags_count))
4068                         tmp = qeth_prep_flush_pack_buffer(queue);
4069                 if (tmp) {
4070                         qeth_flush_buffers(queue, start_index, tmp);
4071                         flush_count += tmp;
4072                 }
4073         }
4074 out:
4075         /* at this point the queue is UNLOCKED again */
4076         if (queue->card->options.performance_stats && do_pack)
4077                 queue->card->perf_stats.bufs_sent_pack += flush_count;
4078
4079         return rc;
4080 }
4081 EXPORT_SYMBOL_GPL(qeth_do_send_packet);
4082
4083 void qeth_fill_tso_ext(struct qeth_hdr_tso *hdr, unsigned int payload_len,
4084                        struct sk_buff *skb, unsigned int proto_len)
4085 {
4086         struct qeth_hdr_ext_tso *ext = &hdr->ext;
4087
4088         ext->hdr_tot_len = sizeof(*ext);
4089         ext->imb_hdr_no = 1;
4090         ext->hdr_type = 1;
4091         ext->hdr_version = 1;
4092         ext->hdr_len = 28;
4093         ext->payload_len = payload_len;
4094         ext->mss = skb_shinfo(skb)->gso_size;
4095         ext->dg_hdr_len = proto_len;
4096 }
4097 EXPORT_SYMBOL_GPL(qeth_fill_tso_ext);
4098
4099 int qeth_xmit(struct qeth_card *card, struct sk_buff *skb,
4100               struct qeth_qdio_out_q *queue, int ipv, int cast_type,
4101               void (*fill_header)(struct qeth_card *card, struct qeth_hdr *hdr,
4102                                   struct sk_buff *skb, int ipv, int cast_type,
4103                                   unsigned int data_len))
4104 {
4105         unsigned int proto_len, hw_hdr_len;
4106         unsigned int frame_len = skb->len;
4107         bool is_tso = skb_is_gso(skb);
4108         unsigned int data_offset = 0;
4109         struct qeth_hdr *hdr = NULL;
4110         unsigned int hd_len = 0;
4111         unsigned int elements;
4112         int push_len, rc;
4113         bool is_sg;
4114
4115         if (is_tso) {
4116                 hw_hdr_len = sizeof(struct qeth_hdr_tso);
4117                 proto_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4118         } else {
4119                 hw_hdr_len = sizeof(struct qeth_hdr);
4120                 proto_len = IS_IQD(card) ? ETH_HLEN : 0;
4121         }
4122
4123         rc = skb_cow_head(skb, hw_hdr_len);
4124         if (rc)
4125                 return rc;
4126
4127         push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
4128                                       &elements);
4129         if (push_len < 0)
4130                 return push_len;
4131         if (is_tso || !push_len) {
4132                 /* HW header needs its own buffer element. */
4133                 hd_len = hw_hdr_len + proto_len;
4134                 data_offset = push_len + proto_len;
4135         }
4136         memset(hdr, 0, hw_hdr_len);
4137         fill_header(card, hdr, skb, ipv, cast_type, frame_len);
4138         if (is_tso)
4139                 qeth_fill_tso_ext((struct qeth_hdr_tso *) hdr,
4140                                   frame_len - proto_len, skb, proto_len);
4141
4142         is_sg = skb_is_nonlinear(skb);
4143         if (IS_IQD(card)) {
4144                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
4145                                               hd_len);
4146         } else {
4147                 /* TODO: drop skb_orphan() once TX completion is fast enough */
4148                 skb_orphan(skb);
4149                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
4150                                          hd_len, elements);
4151         }
4152
4153         if (!rc) {
4154                 if (card->options.performance_stats) {
4155                         card->perf_stats.buf_elements_sent += elements;
4156                         if (is_sg)
4157                                 card->perf_stats.sg_skbs_sent++;
4158                         if (is_tso) {
4159                                 card->perf_stats.large_send_bytes += frame_len;
4160                                 card->perf_stats.large_send_cnt++;
4161                         }
4162                 }
4163         } else {
4164                 if (!push_len)
4165                         kmem_cache_free(qeth_core_header_cache, hdr);
4166                 if (rc == -EBUSY)
4167                         /* roll back to ETH header */
4168                         skb_pull(skb, push_len);
4169         }
4170         return rc;
4171 }
4172 EXPORT_SYMBOL_GPL(qeth_xmit);
4173
4174 static int qeth_setadp_promisc_mode_cb(struct qeth_card *card,
4175                 struct qeth_reply *reply, unsigned long data)
4176 {
4177         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4178         struct qeth_ipacmd_setadpparms *setparms;
4179
4180         QETH_CARD_TEXT(card, 4, "prmadpcb");
4181
4182         setparms = &(cmd->data.setadapterparms);
4183         if (qeth_setadpparms_inspect_rc(cmd)) {
4184                 QETH_CARD_TEXT_(card, 4, "prmrc%x", cmd->hdr.return_code);
4185                 setparms->data.mode = SET_PROMISC_MODE_OFF;
4186         }
4187         card->info.promisc_mode = setparms->data.mode;
4188         return 0;
4189 }
4190
4191 void qeth_setadp_promisc_mode(struct qeth_card *card)
4192 {
4193         enum qeth_ipa_promisc_modes mode;
4194         struct net_device *dev = card->dev;
4195         struct qeth_cmd_buffer *iob;
4196         struct qeth_ipa_cmd *cmd;
4197
4198         QETH_CARD_TEXT(card, 4, "setprom");
4199
4200         if (((dev->flags & IFF_PROMISC) &&
4201              (card->info.promisc_mode == SET_PROMISC_MODE_ON)) ||
4202             (!(dev->flags & IFF_PROMISC) &&
4203              (card->info.promisc_mode == SET_PROMISC_MODE_OFF)))
4204                 return;
4205         mode = SET_PROMISC_MODE_OFF;
4206         if (dev->flags & IFF_PROMISC)
4207                 mode = SET_PROMISC_MODE_ON;
4208         QETH_CARD_TEXT_(card, 4, "mode:%x", mode);
4209
4210         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_PROMISC_MODE,
4211                         sizeof(struct qeth_ipacmd_setadpparms_hdr) + 8);
4212         if (!iob)
4213                 return;
4214         cmd = __ipa_cmd(iob);
4215         cmd->data.setadapterparms.data.mode = mode;
4216         qeth_send_ipa_cmd(card, iob, qeth_setadp_promisc_mode_cb, NULL);
4217 }
4218 EXPORT_SYMBOL_GPL(qeth_setadp_promisc_mode);
4219
4220 struct net_device_stats *qeth_get_stats(struct net_device *dev)
4221 {
4222         struct qeth_card *card;
4223
4224         card = dev->ml_priv;
4225
4226         QETH_CARD_TEXT(card, 5, "getstat");
4227
4228         return &card->stats;
4229 }
4230 EXPORT_SYMBOL_GPL(qeth_get_stats);
4231
4232 static int qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
4233                 struct qeth_reply *reply, unsigned long data)
4234 {
4235         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4236
4237         QETH_CARD_TEXT(card, 4, "chgmaccb");
4238         if (qeth_setadpparms_inspect_rc(cmd))
4239                 return 0;
4240
4241         if (IS_LAYER3(card) || !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
4242                 ether_addr_copy(card->dev->dev_addr,
4243                                 cmd->data.setadapterparms.data.change_addr.addr);
4244                 card->info.mac_bits |= QETH_LAYER2_MAC_READ;
4245         }
4246         return 0;
4247 }
4248
4249 int qeth_setadpparms_change_macaddr(struct qeth_card *card)
4250 {
4251         int rc;
4252         struct qeth_cmd_buffer *iob;
4253         struct qeth_ipa_cmd *cmd;
4254
4255         QETH_CARD_TEXT(card, 4, "chgmac");
4256
4257         iob = qeth_get_adapter_cmd(card, IPA_SETADP_ALTER_MAC_ADDRESS,
4258                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4259                                    sizeof(struct qeth_change_addr));
4260         if (!iob)
4261                 return -ENOMEM;
4262         cmd = __ipa_cmd(iob);
4263         cmd->data.setadapterparms.data.change_addr.cmd = CHANGE_ADDR_READ_MAC;
4264         cmd->data.setadapterparms.data.change_addr.addr_size = ETH_ALEN;
4265         ether_addr_copy(cmd->data.setadapterparms.data.change_addr.addr,
4266                         card->dev->dev_addr);
4267         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_change_macaddr_cb,
4268                                NULL);
4269         return rc;
4270 }
4271 EXPORT_SYMBOL_GPL(qeth_setadpparms_change_macaddr);
4272
4273 static int qeth_setadpparms_set_access_ctrl_cb(struct qeth_card *card,
4274                 struct qeth_reply *reply, unsigned long data)
4275 {
4276         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
4277         struct qeth_set_access_ctrl *access_ctrl_req;
4278         int fallback = *(int *)reply->param;
4279
4280         QETH_CARD_TEXT(card, 4, "setaccb");
4281         if (cmd->hdr.return_code)
4282                 return 0;
4283         qeth_setadpparms_inspect_rc(cmd);
4284
4285         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4286         QETH_DBF_TEXT_(SETUP, 2, "setaccb");
4287         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4288         QETH_DBF_TEXT_(SETUP, 2, "rc=%d",
4289                 cmd->data.setadapterparms.hdr.return_code);
4290         if (cmd->data.setadapterparms.hdr.return_code !=
4291                                                 SET_ACCESS_CTRL_RC_SUCCESS)
4292                 QETH_DBF_MESSAGE(3, "ERR:SET_ACCESS_CTRL(%#x) on device %x: %#x\n",
4293                                  access_ctrl_req->subcmd_code, CARD_DEVID(card),
4294                                  cmd->data.setadapterparms.hdr.return_code);
4295         switch (cmd->data.setadapterparms.hdr.return_code) {
4296         case SET_ACCESS_CTRL_RC_SUCCESS:
4297                 if (card->options.isolation == ISOLATION_MODE_NONE) {
4298                         dev_info(&card->gdev->dev,
4299                             "QDIO data connection isolation is deactivated\n");
4300                 } else {
4301                         dev_info(&card->gdev->dev,
4302                             "QDIO data connection isolation is activated\n");
4303                 }
4304                 break;
4305         case SET_ACCESS_CTRL_RC_ALREADY_NOT_ISOLATED:
4306                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already deactivated\n",
4307                                  CARD_DEVID(card));
4308                 if (fallback)
4309                         card->options.isolation = card->options.prev_isolation;
4310                 break;
4311         case SET_ACCESS_CTRL_RC_ALREADY_ISOLATED:
4312                 QETH_DBF_MESSAGE(2, "QDIO data connection isolation on device %x already activated\n",
4313                                  CARD_DEVID(card));
4314                 if (fallback)
4315                         card->options.isolation = card->options.prev_isolation;
4316                 break;
4317         case SET_ACCESS_CTRL_RC_NOT_SUPPORTED:
4318                 dev_err(&card->gdev->dev, "Adapter does not "
4319                         "support QDIO data connection isolation\n");
4320                 break;
4321         case SET_ACCESS_CTRL_RC_NONE_SHARED_ADAPTER:
4322                 dev_err(&card->gdev->dev,
4323                         "Adapter is dedicated. "
4324                         "QDIO data connection isolation not supported\n");
4325                 if (fallback)
4326                         card->options.isolation = card->options.prev_isolation;
4327                 break;
4328         case SET_ACCESS_CTRL_RC_ACTIVE_CHECKSUM_OFF:
4329                 dev_err(&card->gdev->dev,
4330                         "TSO does not permit QDIO data connection isolation\n");
4331                 if (fallback)
4332                         card->options.isolation = card->options.prev_isolation;
4333                 break;
4334         case SET_ACCESS_CTRL_RC_REFLREL_UNSUPPORTED:
4335                 dev_err(&card->gdev->dev, "The adjacent switch port does not "
4336                         "support reflective relay mode\n");
4337                 if (fallback)
4338                         card->options.isolation = card->options.prev_isolation;
4339                 break;
4340         case SET_ACCESS_CTRL_RC_REFLREL_FAILED:
4341                 dev_err(&card->gdev->dev, "The reflective relay mode cannot be "
4342                                         "enabled at the adjacent switch port");
4343                 if (fallback)
4344                         card->options.isolation = card->options.prev_isolation;
4345                 break;
4346         case SET_ACCESS_CTRL_RC_REFLREL_DEACT_FAILED:
4347                 dev_warn(&card->gdev->dev, "Turning off reflective relay mode "
4348                                         "at the adjacent switch failed\n");
4349                 break;
4350         default:
4351                 /* this should never happen */
4352                 if (fallback)
4353                         card->options.isolation = card->options.prev_isolation;
4354                 break;
4355         }
4356         return 0;
4357 }
4358
4359 static int qeth_setadpparms_set_access_ctrl(struct qeth_card *card,
4360                 enum qeth_ipa_isolation_modes isolation, int fallback)
4361 {
4362         int rc;
4363         struct qeth_cmd_buffer *iob;
4364         struct qeth_ipa_cmd *cmd;
4365         struct qeth_set_access_ctrl *access_ctrl_req;
4366
4367         QETH_CARD_TEXT(card, 4, "setacctl");
4368
4369         QETH_DBF_TEXT_(SETUP, 2, "setacctl");
4370         QETH_DBF_TEXT_(SETUP, 2, "%s", card->gdev->dev.kobj.name);
4371
4372         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_ACCESS_CONTROL,
4373                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4374                                    sizeof(struct qeth_set_access_ctrl));
4375         if (!iob)
4376                 return -ENOMEM;
4377         cmd = __ipa_cmd(iob);
4378         access_ctrl_req = &cmd->data.setadapterparms.data.set_access_ctrl;
4379         access_ctrl_req->subcmd_code = isolation;
4380
4381         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_set_access_ctrl_cb,
4382                                &fallback);
4383         QETH_DBF_TEXT_(SETUP, 2, "rc=%d", rc);
4384         return rc;
4385 }
4386
4387 int qeth_set_access_ctrl_online(struct qeth_card *card, int fallback)
4388 {
4389         int rc = 0;
4390
4391         QETH_CARD_TEXT(card, 4, "setactlo");
4392
4393         if ((card->info.type == QETH_CARD_TYPE_OSD ||
4394              card->info.type == QETH_CARD_TYPE_OSX) &&
4395              qeth_adp_supported(card, IPA_SETADP_SET_ACCESS_CONTROL)) {
4396                 rc = qeth_setadpparms_set_access_ctrl(card,
4397                         card->options.isolation, fallback);
4398                 if (rc) {
4399                         QETH_DBF_MESSAGE(3, "IPA(SET_ACCESS_CTRL(%d) on device %x: sent failed\n",
4400                                          rc, CARD_DEVID(card));
4401                         rc = -EOPNOTSUPP;
4402                 }
4403         } else if (card->options.isolation != ISOLATION_MODE_NONE) {
4404                 card->options.isolation = ISOLATION_MODE_NONE;
4405
4406                 dev_err(&card->gdev->dev, "Adapter does not "
4407                         "support QDIO data connection isolation\n");
4408                 rc = -EOPNOTSUPP;
4409         }
4410         return rc;
4411 }
4412 EXPORT_SYMBOL_GPL(qeth_set_access_ctrl_online);
4413
4414 void qeth_tx_timeout(struct net_device *dev)
4415 {
4416         struct qeth_card *card;
4417
4418         card = dev->ml_priv;
4419         QETH_CARD_TEXT(card, 4, "txtimeo");
4420         card->stats.tx_errors++;
4421         qeth_schedule_recovery(card);
4422 }
4423 EXPORT_SYMBOL_GPL(qeth_tx_timeout);
4424
4425 static int qeth_mdio_read(struct net_device *dev, int phy_id, int regnum)
4426 {
4427         struct qeth_card *card = dev->ml_priv;
4428         int rc = 0;
4429
4430         switch (regnum) {
4431         case MII_BMCR: /* Basic mode control register */
4432                 rc = BMCR_FULLDPLX;
4433                 if ((card->info.link_type != QETH_LINK_TYPE_GBIT_ETH) &&
4434                     (card->info.link_type != QETH_LINK_TYPE_OSN) &&
4435                     (card->info.link_type != QETH_LINK_TYPE_10GBIT_ETH))
4436                         rc |= BMCR_SPEED100;
4437                 break;
4438         case MII_BMSR: /* Basic mode status register */
4439                 rc = BMSR_ERCAP | BMSR_ANEGCOMPLETE | BMSR_LSTATUS |
4440                      BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | BMSR_100FULL |
4441                      BMSR_100BASE4;
4442                 break;
4443         case MII_PHYSID1: /* PHYS ID 1 */
4444                 rc = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 8) |
4445                      dev->dev_addr[2];
4446                 rc = (rc >> 5) & 0xFFFF;
4447                 break;
4448         case MII_PHYSID2: /* PHYS ID 2 */
4449                 rc = (dev->dev_addr[2] << 10) & 0xFFFF;
4450                 break;
4451         case MII_ADVERTISE: /* Advertisement control reg */
4452                 rc = ADVERTISE_ALL;
4453                 break;
4454         case MII_LPA: /* Link partner ability reg */
4455                 rc = LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL |
4456                      LPA_100BASE4 | LPA_LPACK;
4457                 break;
4458         case MII_EXPANSION: /* Expansion register */
4459                 break;
4460         case MII_DCOUNTER: /* disconnect counter */
4461                 break;
4462         case MII_FCSCOUNTER: /* false carrier counter */
4463                 break;
4464         case MII_NWAYTEST: /* N-way auto-neg test register */
4465                 break;
4466         case MII_RERRCOUNTER: /* rx error counter */
4467                 rc = card->stats.rx_errors;
4468                 break;
4469         case MII_SREVISION: /* silicon revision */
4470                 break;
4471         case MII_RESV1: /* reserved 1 */
4472                 break;
4473         case MII_LBRERROR: /* loopback, rx, bypass error */
4474                 break;
4475         case MII_PHYADDR: /* physical address */
4476                 break;
4477         case MII_RESV2: /* reserved 2 */
4478                 break;
4479         case MII_TPISTATUS: /* TPI status for 10mbps */
4480                 break;
4481         case MII_NCONFIG: /* network interface config */
4482                 break;
4483         default:
4484                 break;
4485         }
4486         return rc;
4487 }
4488
4489 static int qeth_send_ipa_snmp_cmd(struct qeth_card *card,
4490                 struct qeth_cmd_buffer *iob, int len,
4491                 int (*reply_cb)(struct qeth_card *, struct qeth_reply *,
4492                         unsigned long),
4493                 void *reply_param)
4494 {
4495         u16 s1, s2;
4496
4497         QETH_CARD_TEXT(card, 4, "sendsnmp");
4498
4499         memcpy(iob->data, IPA_PDU_HEADER, IPA_PDU_HEADER_SIZE);
4500         memcpy(QETH_IPA_CMD_DEST_ADDR(iob->data),
4501                &card->token.ulp_connection_r, QETH_MPC_TOKEN_LENGTH);
4502         /* adjust PDU length fields in IPA_PDU_HEADER */
4503         s1 = (u32) IPA_PDU_HEADER_SIZE + len;
4504         s2 = (u32) len;
4505         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
4506         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
4507         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
4508         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
4509         return qeth_send_control_data(card, IPA_PDU_HEADER_SIZE + len, iob,
4510                                       reply_cb, reply_param);
4511 }
4512
4513 static int qeth_snmp_command_cb(struct qeth_card *card,
4514                 struct qeth_reply *reply, unsigned long sdata)
4515 {
4516         struct qeth_ipa_cmd *cmd;
4517         struct qeth_arp_query_info *qinfo;
4518         struct qeth_snmp_cmd *snmp;
4519         unsigned char *data;
4520         __u16 data_len;
4521
4522         QETH_CARD_TEXT(card, 3, "snpcmdcb");
4523
4524         cmd = (struct qeth_ipa_cmd *) sdata;
4525         data = (unsigned char *)((char *)cmd - reply->offset);
4526         qinfo = (struct qeth_arp_query_info *) reply->param;
4527         snmp = &cmd->data.setadapterparms.data.snmp;
4528
4529         if (cmd->hdr.return_code) {
4530                 QETH_CARD_TEXT_(card, 4, "scer1%x", cmd->hdr.return_code);
4531                 return 0;
4532         }
4533         if (cmd->data.setadapterparms.hdr.return_code) {
4534                 cmd->hdr.return_code =
4535                         cmd->data.setadapterparms.hdr.return_code;
4536                 QETH_CARD_TEXT_(card, 4, "scer2%x", cmd->hdr.return_code);
4537                 return 0;
4538         }
4539         data_len = *((__u16 *)QETH_IPA_PDU_LEN_PDU1(data));
4540         if (cmd->data.setadapterparms.hdr.seq_no == 1)
4541                 data_len -= (__u16)((char *)&snmp->data - (char *)cmd);
4542         else
4543                 data_len -= (__u16)((char *)&snmp->request - (char *)cmd);
4544
4545         /* check if there is enough room in userspace */
4546         if ((qinfo->udata_len - qinfo->udata_offset) < data_len) {
4547                 QETH_CARD_TEXT_(card, 4, "scer3%i", -ENOMEM);
4548                 cmd->hdr.return_code = IPA_RC_ENOMEM;
4549                 return 0;
4550         }
4551         QETH_CARD_TEXT_(card, 4, "snore%i",
4552                        cmd->data.setadapterparms.hdr.used_total);
4553         QETH_CARD_TEXT_(card, 4, "sseqn%i",
4554                 cmd->data.setadapterparms.hdr.seq_no);
4555         /*copy entries to user buffer*/
4556         if (cmd->data.setadapterparms.hdr.seq_no == 1) {
4557                 memcpy(qinfo->udata + qinfo->udata_offset,
4558                        (char *)snmp,
4559                        data_len + offsetof(struct qeth_snmp_cmd, data));
4560                 qinfo->udata_offset += offsetof(struct qeth_snmp_cmd, data);
4561         } else {
4562                 memcpy(qinfo->udata + qinfo->udata_offset,
4563                        (char *)&snmp->request, data_len);
4564         }
4565         qinfo->udata_offset += data_len;
4566         /* check if all replies received ... */
4567                 QETH_CARD_TEXT_(card, 4, "srtot%i",
4568                                cmd->data.setadapterparms.hdr.used_total);
4569                 QETH_CARD_TEXT_(card, 4, "srseq%i",
4570                                cmd->data.setadapterparms.hdr.seq_no);
4571         if (cmd->data.setadapterparms.hdr.seq_no <
4572             cmd->data.setadapterparms.hdr.used_total)
4573                 return 1;
4574         return 0;
4575 }
4576
4577 static int qeth_snmp_command(struct qeth_card *card, char __user *udata)
4578 {
4579         struct qeth_cmd_buffer *iob;
4580         struct qeth_ipa_cmd *cmd;
4581         struct qeth_snmp_ureq *ureq;
4582         unsigned int req_len;
4583         struct qeth_arp_query_info qinfo = {0, };
4584         int rc = 0;
4585
4586         QETH_CARD_TEXT(card, 3, "snmpcmd");
4587
4588         if (card->info.guestlan)
4589                 return -EOPNOTSUPP;
4590
4591         if ((!qeth_adp_supported(card, IPA_SETADP_SET_SNMP_CONTROL)) &&
4592             IS_LAYER3(card))
4593                 return -EOPNOTSUPP;
4594
4595         /* skip 4 bytes (data_len struct member) to get req_len */
4596         if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int)))
4597                 return -EFAULT;
4598         if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE -
4599                        sizeof(struct qeth_ipacmd_hdr) -
4600                        sizeof(struct qeth_ipacmd_setadpparms_hdr)))
4601                 return -EINVAL;
4602         ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr));
4603         if (IS_ERR(ureq)) {
4604                 QETH_CARD_TEXT(card, 2, "snmpnome");
4605                 return PTR_ERR(ureq);
4606         }
4607         qinfo.udata_len = ureq->hdr.data_len;
4608         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
4609         if (!qinfo.udata) {
4610                 kfree(ureq);
4611                 return -ENOMEM;
4612         }
4613         qinfo.udata_offset = sizeof(struct qeth_snmp_ureq_hdr);
4614
4615         iob = qeth_get_adapter_cmd(card, IPA_SETADP_SET_SNMP_CONTROL,
4616                                    QETH_SNMP_SETADP_CMDLENGTH + req_len);
4617         if (!iob) {
4618                 rc = -ENOMEM;
4619                 goto out;
4620         }
4621         cmd = __ipa_cmd(iob);
4622         memcpy(&cmd->data.setadapterparms.data.snmp, &ureq->cmd, req_len);
4623         rc = qeth_send_ipa_snmp_cmd(card, iob, QETH_SETADP_BASE_LEN + req_len,
4624                                     qeth_snmp_command_cb, (void *)&qinfo);
4625         if (rc)
4626                 QETH_DBF_MESSAGE(2, "SNMP command failed on device %x: (%#x)\n",
4627                                  CARD_DEVID(card), rc);
4628         else {
4629                 if (copy_to_user(udata, qinfo.udata, qinfo.udata_len))
4630                         rc = -EFAULT;
4631         }
4632 out:
4633         kfree(ureq);
4634         kfree(qinfo.udata);
4635         return rc;
4636 }
4637
4638 static int qeth_setadpparms_query_oat_cb(struct qeth_card *card,
4639                 struct qeth_reply *reply, unsigned long data)
4640 {
4641         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4642         struct qeth_qoat_priv *priv;
4643         char *resdata;
4644         int resdatalen;
4645
4646         QETH_CARD_TEXT(card, 3, "qoatcb");
4647         if (qeth_setadpparms_inspect_rc(cmd))
4648                 return 0;
4649
4650         priv = (struct qeth_qoat_priv *)reply->param;
4651         resdatalen = cmd->data.setadapterparms.hdr.cmdlength;
4652         resdata = (char *)data + 28;
4653
4654         if (resdatalen > (priv->buffer_len - priv->response_len)) {
4655                 cmd->hdr.return_code = IPA_RC_FFFF;
4656                 return 0;
4657         }
4658
4659         memcpy((priv->buffer + priv->response_len), resdata,
4660                 resdatalen);
4661         priv->response_len += resdatalen;
4662
4663         if (cmd->data.setadapterparms.hdr.seq_no <
4664             cmd->data.setadapterparms.hdr.used_total)
4665                 return 1;
4666         return 0;
4667 }
4668
4669 static int qeth_query_oat_command(struct qeth_card *card, char __user *udata)
4670 {
4671         int rc = 0;
4672         struct qeth_cmd_buffer *iob;
4673         struct qeth_ipa_cmd *cmd;
4674         struct qeth_query_oat *oat_req;
4675         struct qeth_query_oat_data oat_data;
4676         struct qeth_qoat_priv priv;
4677         void __user *tmp;
4678
4679         QETH_CARD_TEXT(card, 3, "qoatcmd");
4680
4681         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_OAT)) {
4682                 rc = -EOPNOTSUPP;
4683                 goto out;
4684         }
4685
4686         if (copy_from_user(&oat_data, udata,
4687             sizeof(struct qeth_query_oat_data))) {
4688                         rc = -EFAULT;
4689                         goto out;
4690         }
4691
4692         priv.buffer_len = oat_data.buffer_len;
4693         priv.response_len = 0;
4694         priv.buffer = vzalloc(oat_data.buffer_len);
4695         if (!priv.buffer) {
4696                 rc = -ENOMEM;
4697                 goto out;
4698         }
4699
4700         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_OAT,
4701                                    sizeof(struct qeth_ipacmd_setadpparms_hdr) +
4702                                    sizeof(struct qeth_query_oat));
4703         if (!iob) {
4704                 rc = -ENOMEM;
4705                 goto out_free;
4706         }
4707         cmd = __ipa_cmd(iob);
4708         oat_req = &cmd->data.setadapterparms.data.query_oat;
4709         oat_req->subcmd_code = oat_data.command;
4710
4711         rc = qeth_send_ipa_cmd(card, iob, qeth_setadpparms_query_oat_cb,
4712                                &priv);
4713         if (!rc) {
4714                 if (is_compat_task())
4715                         tmp = compat_ptr(oat_data.ptr);
4716                 else
4717                         tmp = (void __user *)(unsigned long)oat_data.ptr;
4718
4719                 if (copy_to_user(tmp, priv.buffer,
4720                     priv.response_len)) {
4721                         rc = -EFAULT;
4722                         goto out_free;
4723                 }
4724
4725                 oat_data.response_len = priv.response_len;
4726
4727                 if (copy_to_user(udata, &oat_data,
4728                     sizeof(struct qeth_query_oat_data)))
4729                         rc = -EFAULT;
4730         } else
4731                 if (rc == IPA_RC_FFFF)
4732                         rc = -EFAULT;
4733
4734 out_free:
4735         vfree(priv.buffer);
4736 out:
4737         return rc;
4738 }
4739
4740 static int qeth_query_card_info_cb(struct qeth_card *card,
4741                                    struct qeth_reply *reply, unsigned long data)
4742 {
4743         struct carrier_info *carrier_info = (struct carrier_info *)reply->param;
4744         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
4745         struct qeth_query_card_info *card_info;
4746
4747         QETH_CARD_TEXT(card, 2, "qcrdincb");
4748         if (qeth_setadpparms_inspect_rc(cmd))
4749                 return 0;
4750
4751         card_info = &cmd->data.setadapterparms.data.card_info;
4752         carrier_info->card_type = card_info->card_type;
4753         carrier_info->port_mode = card_info->port_mode;
4754         carrier_info->port_speed = card_info->port_speed;
4755         return 0;
4756 }
4757
4758 static int qeth_query_card_info(struct qeth_card *card,
4759                                 struct carrier_info *carrier_info)
4760 {
4761         struct qeth_cmd_buffer *iob;
4762
4763         QETH_CARD_TEXT(card, 2, "qcrdinfo");
4764         if (!qeth_adp_supported(card, IPA_SETADP_QUERY_CARD_INFO))
4765                 return -EOPNOTSUPP;
4766         iob = qeth_get_adapter_cmd(card, IPA_SETADP_QUERY_CARD_INFO,
4767                 sizeof(struct qeth_ipacmd_setadpparms_hdr));
4768         if (!iob)
4769                 return -ENOMEM;
4770         return qeth_send_ipa_cmd(card, iob, qeth_query_card_info_cb,
4771                                         (void *)carrier_info);
4772 }
4773
4774 /**
4775  * qeth_vm_request_mac() - Request a hypervisor-managed MAC address
4776  * @card: pointer to a qeth_card
4777  *
4778  * Returns
4779  *      0, if a MAC address has been set for the card's netdevice
4780  *      a return code, for various error conditions
4781  */
4782 int qeth_vm_request_mac(struct qeth_card *card)
4783 {
4784         struct diag26c_mac_resp *response;
4785         struct diag26c_mac_req *request;
4786         struct ccw_dev_id id;
4787         int rc;
4788
4789         QETH_DBF_TEXT(SETUP, 2, "vmreqmac");
4790
4791         request = kzalloc(sizeof(*request), GFP_KERNEL | GFP_DMA);
4792         response = kzalloc(sizeof(*response), GFP_KERNEL | GFP_DMA);
4793         if (!request || !response) {
4794                 rc = -ENOMEM;
4795                 goto out;
4796         }
4797
4798         ccw_device_get_id(CARD_DDEV(card), &id);
4799         request->resp_buf_len = sizeof(*response);
4800         request->resp_version = DIAG26C_VERSION2;
4801         request->op_code = DIAG26C_GET_MAC;
4802         request->devno = id.devno;
4803
4804         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4805         rc = diag26c(request, response, DIAG26C_MAC_SERVICES);
4806         QETH_DBF_HEX(CTRL, 2, request, sizeof(*request));
4807         if (rc)
4808                 goto out;
4809         QETH_DBF_HEX(CTRL, 2, response, sizeof(*response));
4810
4811         if (request->resp_buf_len < sizeof(*response) ||
4812             response->version != request->resp_version) {
4813                 rc = -EIO;
4814                 QETH_DBF_TEXT(SETUP, 2, "badresp");
4815                 QETH_DBF_HEX(SETUP, 2, &request->resp_buf_len,
4816                              sizeof(request->resp_buf_len));
4817         } else if (!is_valid_ether_addr(response->mac)) {
4818                 rc = -EINVAL;
4819                 QETH_DBF_TEXT(SETUP, 2, "badmac");
4820                 QETH_DBF_HEX(SETUP, 2, response->mac, ETH_ALEN);
4821         } else {
4822                 ether_addr_copy(card->dev->dev_addr, response->mac);
4823         }
4824
4825 out:
4826         kfree(response);
4827         kfree(request);
4828         return rc;
4829 }
4830 EXPORT_SYMBOL_GPL(qeth_vm_request_mac);
4831
4832 static int qeth_get_qdio_q_format(struct qeth_card *card)
4833 {
4834         if (card->info.type == QETH_CARD_TYPE_IQD)
4835                 return QDIO_IQDIO_QFMT;
4836         else
4837                 return QDIO_QETH_QFMT;
4838 }
4839
4840 static void qeth_determine_capabilities(struct qeth_card *card)
4841 {
4842         int rc;
4843         int length;
4844         char *prcd;
4845         struct ccw_device *ddev;
4846         int ddev_offline = 0;
4847
4848         QETH_DBF_TEXT(SETUP, 2, "detcapab");
4849         ddev = CARD_DDEV(card);
4850         if (!ddev->online) {
4851                 ddev_offline = 1;
4852                 rc = ccw_device_set_online(ddev);
4853                 if (rc) {
4854                         QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
4855                         goto out;
4856                 }
4857         }
4858
4859         rc = qeth_read_conf_data(card, (void **) &prcd, &length);
4860         if (rc) {
4861                 QETH_DBF_MESSAGE(2, "qeth_read_conf_data on device %x returned %i\n",
4862                                  CARD_DEVID(card), rc);
4863                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
4864                 goto out_offline;
4865         }
4866         qeth_configure_unitaddr(card, prcd);
4867         if (ddev_offline)
4868                 qeth_configure_blkt_default(card, prcd);
4869         kfree(prcd);
4870
4871         rc = qdio_get_ssqd_desc(ddev, &card->ssqd);
4872         if (rc)
4873                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
4874
4875         QETH_DBF_TEXT_(SETUP, 2, "qfmt%d", card->ssqd.qfmt);
4876         QETH_DBF_TEXT_(SETUP, 2, "ac1:%02x", card->ssqd.qdioac1);
4877         QETH_DBF_TEXT_(SETUP, 2, "ac2:%04x", card->ssqd.qdioac2);
4878         QETH_DBF_TEXT_(SETUP, 2, "ac3:%04x", card->ssqd.qdioac3);
4879         QETH_DBF_TEXT_(SETUP, 2, "icnt%d", card->ssqd.icnt);
4880         if (!((card->ssqd.qfmt != QDIO_IQDIO_QFMT) ||
4881             ((card->ssqd.qdioac1 & CHSC_AC1_INITIATE_INPUTQ) == 0) ||
4882             ((card->ssqd.qdioac3 & CHSC_AC3_FORMAT2_CQ_AVAILABLE) == 0))) {
4883                 dev_info(&card->gdev->dev,
4884                         "Completion Queueing supported\n");
4885         } else {
4886                 card->options.cq = QETH_CQ_NOTAVAILABLE;
4887         }
4888
4889
4890 out_offline:
4891         if (ddev_offline == 1)
4892                 ccw_device_set_offline(ddev);
4893 out:
4894         return;
4895 }
4896
4897 static void qeth_qdio_establish_cq(struct qeth_card *card,
4898                                    struct qdio_buffer **in_sbal_ptrs,
4899                                    void (**queue_start_poll)
4900                                         (struct ccw_device *, int,
4901                                          unsigned long))
4902 {
4903         int i;
4904
4905         if (card->options.cq == QETH_CQ_ENABLED) {
4906                 int offset = QDIO_MAX_BUFFERS_PER_Q *
4907                              (card->qdio.no_in_queues - 1);
4908                 for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4909                         in_sbal_ptrs[offset + i] = (struct qdio_buffer *)
4910                                 virt_to_phys(card->qdio.c_q->bufs[i].buffer);
4911                 }
4912
4913                 queue_start_poll[card->qdio.no_in_queues - 1] = NULL;
4914         }
4915 }
4916
4917 static int qeth_qdio_establish(struct qeth_card *card)
4918 {
4919         struct qdio_initialize init_data;
4920         char *qib_param_field;
4921         struct qdio_buffer **in_sbal_ptrs;
4922         void (**queue_start_poll) (struct ccw_device *, int, unsigned long);
4923         struct qdio_buffer **out_sbal_ptrs;
4924         int i, j, k;
4925         int rc = 0;
4926
4927         QETH_DBF_TEXT(SETUP, 2, "qdioest");
4928
4929         qib_param_field = kzalloc(QDIO_MAX_BUFFERS_PER_Q,
4930                                   GFP_KERNEL);
4931         if (!qib_param_field) {
4932                 rc =  -ENOMEM;
4933                 goto out_free_nothing;
4934         }
4935
4936         qeth_create_qib_param_field(card, qib_param_field);
4937         qeth_create_qib_param_field_blkt(card, qib_param_field);
4938
4939         in_sbal_ptrs = kcalloc(card->qdio.no_in_queues * QDIO_MAX_BUFFERS_PER_Q,
4940                                sizeof(void *),
4941                                GFP_KERNEL);
4942         if (!in_sbal_ptrs) {
4943                 rc = -ENOMEM;
4944                 goto out_free_qib_param;
4945         }
4946         for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
4947                 in_sbal_ptrs[i] = (struct qdio_buffer *)
4948                         virt_to_phys(card->qdio.in_q->bufs[i].buffer);
4949         }
4950
4951         queue_start_poll = kcalloc(card->qdio.no_in_queues, sizeof(void *),
4952                                    GFP_KERNEL);
4953         if (!queue_start_poll) {
4954                 rc = -ENOMEM;
4955                 goto out_free_in_sbals;
4956         }
4957         for (i = 0; i < card->qdio.no_in_queues; ++i)
4958                 queue_start_poll[i] = qeth_qdio_start_poll;
4959
4960         qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
4961
4962         out_sbal_ptrs =
4963                 kcalloc(card->qdio.no_out_queues * QDIO_MAX_BUFFERS_PER_Q,
4964                         sizeof(void *),
4965                         GFP_KERNEL);
4966         if (!out_sbal_ptrs) {
4967                 rc = -ENOMEM;
4968                 goto out_free_queue_start_poll;
4969         }
4970         for (i = 0, k = 0; i < card->qdio.no_out_queues; ++i)
4971                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j, ++k) {
4972                         out_sbal_ptrs[k] = (struct qdio_buffer *)virt_to_phys(
4973                                 card->qdio.out_qs[i]->bufs[j]->buffer);
4974                 }
4975
4976         memset(&init_data, 0, sizeof(struct qdio_initialize));
4977         init_data.cdev                   = CARD_DDEV(card);
4978         init_data.q_format               = qeth_get_qdio_q_format(card);
4979         init_data.qib_param_field_format = 0;
4980         init_data.qib_param_field        = qib_param_field;
4981         init_data.no_input_qs            = card->qdio.no_in_queues;
4982         init_data.no_output_qs           = card->qdio.no_out_queues;
4983         init_data.input_handler          = qeth_qdio_input_handler;
4984         init_data.output_handler         = qeth_qdio_output_handler;
4985         init_data.queue_start_poll_array = queue_start_poll;
4986         init_data.int_parm               = (unsigned long) card;
4987         init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
4988         init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
4989         init_data.output_sbal_state_array = card->qdio.out_bufstates;
4990         init_data.scan_threshold =
4991                 (card->info.type == QETH_CARD_TYPE_IQD) ? 1 : 32;
4992
4993         if (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ALLOCATED,
4994                 QETH_QDIO_ESTABLISHED) == QETH_QDIO_ALLOCATED) {
4995                 rc = qdio_allocate(&init_data);
4996                 if (rc) {
4997                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
4998                         goto out;
4999                 }
5000                 rc = qdio_establish(&init_data);
5001                 if (rc) {
5002                         atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
5003                         qdio_free(CARD_DDEV(card));
5004                 }
5005         }
5006
5007         switch (card->options.cq) {
5008         case QETH_CQ_ENABLED:
5009                 dev_info(&card->gdev->dev, "Completion Queue support enabled");
5010                 break;
5011         case QETH_CQ_DISABLED:
5012                 dev_info(&card->gdev->dev, "Completion Queue support disabled");
5013                 break;
5014         default:
5015                 break;
5016         }
5017 out:
5018         kfree(out_sbal_ptrs);
5019 out_free_queue_start_poll:
5020         kfree(queue_start_poll);
5021 out_free_in_sbals:
5022         kfree(in_sbal_ptrs);
5023 out_free_qib_param:
5024         kfree(qib_param_field);
5025 out_free_nothing:
5026         return rc;
5027 }
5028
5029 static void qeth_core_free_card(struct qeth_card *card)
5030 {
5031         QETH_DBF_TEXT(SETUP, 2, "freecrd");
5032         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
5033         qeth_clean_channel(&card->read);
5034         qeth_clean_channel(&card->write);
5035         qeth_clean_channel(&card->data);
5036         qeth_free_qdio_buffers(card);
5037         unregister_service_level(&card->qeth_service_level);
5038         dev_set_drvdata(&card->gdev->dev, NULL);
5039         kfree(card);
5040 }
5041
5042 void qeth_trace_features(struct qeth_card *card)
5043 {
5044         QETH_CARD_TEXT(card, 2, "features");
5045         QETH_CARD_HEX(card, 2, &card->options.ipa4, sizeof(card->options.ipa4));
5046         QETH_CARD_HEX(card, 2, &card->options.ipa6, sizeof(card->options.ipa6));
5047         QETH_CARD_HEX(card, 2, &card->options.adp, sizeof(card->options.adp));
5048         QETH_CARD_HEX(card, 2, &card->info.diagass_support,
5049                       sizeof(card->info.diagass_support));
5050 }
5051 EXPORT_SYMBOL_GPL(qeth_trace_features);
5052
5053 static struct ccw_device_id qeth_ids[] = {
5054         {CCW_DEVICE_DEVTYPE(0x1731, 0x01, 0x1732, 0x01),
5055                                         .driver_info = QETH_CARD_TYPE_OSD},
5056         {CCW_DEVICE_DEVTYPE(0x1731, 0x05, 0x1732, 0x05),
5057                                         .driver_info = QETH_CARD_TYPE_IQD},
5058         {CCW_DEVICE_DEVTYPE(0x1731, 0x06, 0x1732, 0x06),
5059                                         .driver_info = QETH_CARD_TYPE_OSN},
5060         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x03),
5061                                         .driver_info = QETH_CARD_TYPE_OSM},
5062         {CCW_DEVICE_DEVTYPE(0x1731, 0x02, 0x1732, 0x02),
5063                                         .driver_info = QETH_CARD_TYPE_OSX},
5064         {},
5065 };
5066 MODULE_DEVICE_TABLE(ccw, qeth_ids);
5067
5068 static struct ccw_driver qeth_ccw_driver = {
5069         .driver = {
5070                 .owner = THIS_MODULE,
5071                 .name = "qeth",
5072         },
5073         .ids = qeth_ids,
5074         .probe = ccwgroup_probe_ccwdev,
5075         .remove = ccwgroup_remove_ccwdev,
5076 };
5077
5078 int qeth_core_hardsetup_card(struct qeth_card *card)
5079 {
5080         int retries = 3;
5081         int rc;
5082
5083         QETH_DBF_TEXT(SETUP, 2, "hrdsetup");
5084         atomic_set(&card->force_alloc_skb, 0);
5085         qeth_update_from_chp_desc(card);
5086 retry:
5087         if (retries < 3)
5088                 QETH_DBF_MESSAGE(2, "Retrying to do IDX activates on device %x.\n",
5089                                  CARD_DEVID(card));
5090         rc = qeth_qdio_clear_card(card, card->info.type != QETH_CARD_TYPE_IQD);
5091         ccw_device_set_offline(CARD_DDEV(card));
5092         ccw_device_set_offline(CARD_WDEV(card));
5093         ccw_device_set_offline(CARD_RDEV(card));
5094         qdio_free(CARD_DDEV(card));
5095         rc = ccw_device_set_online(CARD_RDEV(card));
5096         if (rc)
5097                 goto retriable;
5098         rc = ccw_device_set_online(CARD_WDEV(card));
5099         if (rc)
5100                 goto retriable;
5101         rc = ccw_device_set_online(CARD_DDEV(card));
5102         if (rc)
5103                 goto retriable;
5104 retriable:
5105         if (rc == -ERESTARTSYS) {
5106                 QETH_DBF_TEXT(SETUP, 2, "break1");
5107                 return rc;
5108         } else if (rc) {
5109                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
5110                 if (--retries < 0)
5111                         goto out;
5112                 else
5113                         goto retry;
5114         }
5115         qeth_determine_capabilities(card);
5116         qeth_init_tokens(card);
5117         qeth_init_func_level(card);
5118         rc = qeth_idx_activate_channel(card, &card->read, qeth_idx_read_cb);
5119         if (rc == -ERESTARTSYS) {
5120                 QETH_DBF_TEXT(SETUP, 2, "break2");
5121                 return rc;
5122         } else if (rc) {
5123                 QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
5124                 if (--retries < 0)
5125                         goto out;
5126                 else
5127                         goto retry;
5128         }
5129         rc = qeth_idx_activate_channel(card, &card->write, qeth_idx_write_cb);
5130         if (rc == -ERESTARTSYS) {
5131                 QETH_DBF_TEXT(SETUP, 2, "break3");
5132                 return rc;
5133         } else if (rc) {
5134                 QETH_DBF_TEXT_(SETUP, 2, "4err%d", rc);
5135                 if (--retries < 0)
5136                         goto out;
5137                 else
5138                         goto retry;
5139         }
5140         card->read_or_write_problem = 0;
5141         rc = qeth_mpc_initialize(card);
5142         if (rc) {
5143                 QETH_DBF_TEXT_(SETUP, 2, "5err%d", rc);
5144                 goto out;
5145         }
5146
5147         rc = qeth_send_startlan(card);
5148         if (rc) {
5149                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
5150                 if (rc == IPA_RC_LAN_OFFLINE) {
5151                         dev_warn(&card->gdev->dev,
5152                                 "The LAN is offline\n");
5153                         netif_carrier_off(card->dev);
5154                 } else {
5155                         rc = -ENODEV;
5156                         goto out;
5157                 }
5158         } else {
5159                 netif_carrier_on(card->dev);
5160         }
5161
5162         card->options.ipa4.supported_funcs = 0;
5163         card->options.ipa6.supported_funcs = 0;
5164         card->options.adp.supported_funcs = 0;
5165         card->options.sbp.supported_funcs = 0;
5166         card->info.diagass_support = 0;
5167         rc = qeth_query_ipassists(card, QETH_PROT_IPV4);
5168         if (rc == -ENOMEM)
5169                 goto out;
5170         if (qeth_is_supported(card, IPA_IPV6)) {
5171                 rc = qeth_query_ipassists(card, QETH_PROT_IPV6);
5172                 if (rc == -ENOMEM)
5173                         goto out;
5174         }
5175         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
5176                 rc = qeth_query_setadapterparms(card);
5177                 if (rc < 0) {
5178                         QETH_DBF_TEXT_(SETUP, 2, "7err%d", rc);
5179                         goto out;
5180                 }
5181         }
5182         if (qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
5183                 rc = qeth_query_setdiagass(card);
5184                 if (rc < 0) {
5185                         QETH_DBF_TEXT_(SETUP, 2, "8err%d", rc);
5186                         goto out;
5187                 }
5188         }
5189         return 0;
5190 out:
5191         dev_warn(&card->gdev->dev, "The qeth device driver failed to recover "
5192                 "an error on the device\n");
5193         QETH_DBF_MESSAGE(2, "Initialization for device %x failed in hardsetup! rc=%d\n",
5194                          CARD_DEVID(card), rc);
5195         return rc;
5196 }
5197 EXPORT_SYMBOL_GPL(qeth_core_hardsetup_card);
5198
5199 static void qeth_create_skb_frag(struct qdio_buffer_element *element,
5200                                  struct sk_buff *skb, int offset, int data_len)
5201 {
5202         struct page *page = virt_to_page(element->addr);
5203         unsigned int next_frag;
5204
5205         /* first fill the linear space */
5206         if (!skb->len) {
5207                 unsigned int linear = min(data_len, skb_tailroom(skb));
5208
5209                 skb_put_data(skb, element->addr + offset, linear);
5210                 data_len -= linear;
5211                 if (!data_len)
5212                         return;
5213                 offset += linear;
5214                 /* fall through to add page frag for remaining data */
5215         }
5216
5217         next_frag = skb_shinfo(skb)->nr_frags;
5218         get_page(page);
5219         skb_add_rx_frag(skb, next_frag, page, offset, data_len, data_len);
5220 }
5221
5222 static inline int qeth_is_last_sbale(struct qdio_buffer_element *sbale)
5223 {
5224         return (sbale->eflags & SBAL_EFLAGS_LAST_ENTRY);
5225 }
5226
5227 struct sk_buff *qeth_core_get_next_skb(struct qeth_card *card,
5228                 struct qeth_qdio_buffer *qethbuffer,
5229                 struct qdio_buffer_element **__element, int *__offset,
5230                 struct qeth_hdr **hdr)
5231 {
5232         struct qdio_buffer_element *element = *__element;
5233         struct qdio_buffer *buffer = qethbuffer->buffer;
5234         int offset = *__offset;
5235         struct sk_buff *skb;
5236         int skb_len = 0;
5237         void *data_ptr;
5238         int data_len;
5239         int headroom = 0;
5240         int use_rx_sg = 0;
5241
5242         /* qeth_hdr must not cross element boundaries */
5243         while (element->length < offset + sizeof(struct qeth_hdr)) {
5244                 if (qeth_is_last_sbale(element))
5245                         return NULL;
5246                 element++;
5247                 offset = 0;
5248         }
5249         *hdr = element->addr + offset;
5250
5251         offset += sizeof(struct qeth_hdr);
5252         switch ((*hdr)->hdr.l2.id) {
5253         case QETH_HEADER_TYPE_LAYER2:
5254                 skb_len = (*hdr)->hdr.l2.pkt_length;
5255                 break;
5256         case QETH_HEADER_TYPE_LAYER3:
5257                 skb_len = (*hdr)->hdr.l3.length;
5258                 headroom = ETH_HLEN;
5259                 break;
5260         case QETH_HEADER_TYPE_OSN:
5261                 skb_len = (*hdr)->hdr.osn.pdu_length;
5262                 headroom = sizeof(struct qeth_hdr);
5263                 break;
5264         default:
5265                 break;
5266         }
5267
5268         if (!skb_len)
5269                 return NULL;
5270
5271         if (((skb_len >= card->options.rx_sg_cb) &&
5272              (!(card->info.type == QETH_CARD_TYPE_OSN)) &&
5273              (!atomic_read(&card->force_alloc_skb))) ||
5274             (card->options.cq == QETH_CQ_ENABLED))
5275                 use_rx_sg = 1;
5276
5277         if (use_rx_sg && qethbuffer->rx_skb) {
5278                 /* QETH_CQ_ENABLED only: */
5279                 skb = qethbuffer->rx_skb;
5280                 qethbuffer->rx_skb = NULL;
5281         } else {
5282                 unsigned int linear = (use_rx_sg) ? QETH_RX_PULL_LEN : skb_len;
5283
5284                 skb = napi_alloc_skb(&card->napi, linear + headroom);
5285         }
5286         if (!skb)
5287                 goto no_mem;
5288         if (headroom)
5289                 skb_reserve(skb, headroom);
5290
5291         data_ptr = element->addr + offset;
5292         while (skb_len) {
5293                 data_len = min(skb_len, (int)(element->length - offset));
5294                 if (data_len) {
5295                         if (use_rx_sg)
5296                                 qeth_create_skb_frag(element, skb, offset,
5297                                                      data_len);
5298                         else
5299                                 skb_put_data(skb, data_ptr, data_len);
5300                 }
5301                 skb_len -= data_len;
5302                 if (skb_len) {
5303                         if (qeth_is_last_sbale(element)) {
5304                                 QETH_CARD_TEXT(card, 4, "unexeob");
5305                                 QETH_CARD_HEX(card, 2, buffer, sizeof(void *));
5306                                 dev_kfree_skb_any(skb);
5307                                 card->stats.rx_errors++;
5308                                 return NULL;
5309                         }
5310                         element++;
5311                         offset = 0;
5312                         data_ptr = element->addr;
5313                 } else {
5314                         offset += data_len;
5315                 }
5316         }
5317         *__element = element;
5318         *__offset = offset;
5319         if (use_rx_sg && card->options.performance_stats) {
5320                 card->perf_stats.sg_skbs_rx++;
5321                 card->perf_stats.sg_frags_rx += skb_shinfo(skb)->nr_frags;
5322         }
5323         return skb;
5324 no_mem:
5325         if (net_ratelimit()) {
5326                 QETH_CARD_TEXT(card, 2, "noskbmem");
5327         }
5328         card->stats.rx_dropped++;
5329         return NULL;
5330 }
5331 EXPORT_SYMBOL_GPL(qeth_core_get_next_skb);
5332
5333 int qeth_poll(struct napi_struct *napi, int budget)
5334 {
5335         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
5336         int work_done = 0;
5337         struct qeth_qdio_buffer *buffer;
5338         int done;
5339         int new_budget = budget;
5340
5341         if (card->options.performance_stats) {
5342                 card->perf_stats.inbound_cnt++;
5343                 card->perf_stats.inbound_start_time = qeth_get_micros();
5344         }
5345
5346         while (1) {
5347                 if (!card->rx.b_count) {
5348                         card->rx.qdio_err = 0;
5349                         card->rx.b_count = qdio_get_next_buffers(
5350                                 card->data.ccwdev, 0, &card->rx.b_index,
5351                                 &card->rx.qdio_err);
5352                         if (card->rx.b_count <= 0) {
5353                                 card->rx.b_count = 0;
5354                                 break;
5355                         }
5356                         card->rx.b_element =
5357                                 &card->qdio.in_q->bufs[card->rx.b_index]
5358                                 .buffer->element[0];
5359                         card->rx.e_offset = 0;
5360                 }
5361
5362                 while (card->rx.b_count) {
5363                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
5364                         if (!(card->rx.qdio_err &&
5365                             qeth_check_qdio_errors(card, buffer->buffer,
5366                             card->rx.qdio_err, "qinerr")))
5367                                 work_done +=
5368                                         card->discipline->process_rx_buffer(
5369                                                 card, new_budget, &done);
5370                         else
5371                                 done = 1;
5372
5373                         if (done) {
5374                                 if (card->options.performance_stats)
5375                                         card->perf_stats.bufs_rec++;
5376                                 qeth_put_buffer_pool_entry(card,
5377                                         buffer->pool_entry);
5378                                 qeth_queue_input_buffer(card, card->rx.b_index);
5379                                 card->rx.b_count--;
5380                                 if (card->rx.b_count) {
5381                                         card->rx.b_index =
5382                                                 (card->rx.b_index + 1) %
5383                                                 QDIO_MAX_BUFFERS_PER_Q;
5384                                         card->rx.b_element =
5385                                                 &card->qdio.in_q
5386                                                 ->bufs[card->rx.b_index]
5387                                                 .buffer->element[0];
5388                                         card->rx.e_offset = 0;
5389                                 }
5390                         }
5391
5392                         if (work_done >= budget)
5393                                 goto out;
5394                         else
5395                                 new_budget = budget - work_done;
5396                 }
5397         }
5398
5399         napi_complete_done(napi, work_done);
5400         if (qdio_start_irq(card->data.ccwdev, 0))
5401                 napi_schedule(&card->napi);
5402 out:
5403         if (card->options.performance_stats)
5404                 card->perf_stats.inbound_time += qeth_get_micros() -
5405                         card->perf_stats.inbound_start_time;
5406         return work_done;
5407 }
5408 EXPORT_SYMBOL_GPL(qeth_poll);
5409
5410 static int qeth_setassparms_inspect_rc(struct qeth_ipa_cmd *cmd)
5411 {
5412         if (!cmd->hdr.return_code)
5413                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5414         return cmd->hdr.return_code;
5415 }
5416
5417 static int qeth_setassparms_get_caps_cb(struct qeth_card *card,
5418                                         struct qeth_reply *reply,
5419                                         unsigned long data)
5420 {
5421         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
5422         struct qeth_ipa_caps *caps = reply->param;
5423
5424         if (qeth_setassparms_inspect_rc(cmd))
5425                 return 0;
5426
5427         caps->supported = cmd->data.setassparms.data.caps.supported;
5428         caps->enabled = cmd->data.setassparms.data.caps.enabled;
5429         return 0;
5430 }
5431
5432 int qeth_setassparms_cb(struct qeth_card *card,
5433                         struct qeth_reply *reply, unsigned long data)
5434 {
5435         struct qeth_ipa_cmd *cmd;
5436
5437         QETH_CARD_TEXT(card, 4, "defadpcb");
5438
5439         cmd = (struct qeth_ipa_cmd *) data;
5440         if (cmd->hdr.return_code == 0) {
5441                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
5442                 if (cmd->hdr.prot_version == QETH_PROT_IPV4)
5443                         card->options.ipa4.enabled_funcs = cmd->hdr.ipa_enabled;
5444                 if (cmd->hdr.prot_version == QETH_PROT_IPV6)
5445                         card->options.ipa6.enabled_funcs = cmd->hdr.ipa_enabled;
5446         }
5447         return 0;
5448 }
5449 EXPORT_SYMBOL_GPL(qeth_setassparms_cb);
5450
5451 struct qeth_cmd_buffer *qeth_get_setassparms_cmd(struct qeth_card *card,
5452                                                  enum qeth_ipa_funcs ipa_func,
5453                                                  __u16 cmd_code, __u16 len,
5454                                                  enum qeth_prot_versions prot)
5455 {
5456         struct qeth_cmd_buffer *iob;
5457         struct qeth_ipa_cmd *cmd;
5458
5459         QETH_CARD_TEXT(card, 4, "getasscm");
5460         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_SETASSPARMS, prot);
5461
5462         if (iob) {
5463                 cmd = __ipa_cmd(iob);
5464                 cmd->data.setassparms.hdr.assist_no = ipa_func;
5465                 cmd->data.setassparms.hdr.length = 8 + len;
5466                 cmd->data.setassparms.hdr.command_code = cmd_code;
5467         }
5468
5469         return iob;
5470 }
5471 EXPORT_SYMBOL_GPL(qeth_get_setassparms_cmd);
5472
5473 int qeth_send_setassparms(struct qeth_card *card,
5474                           struct qeth_cmd_buffer *iob, __u16 len, long data,
5475                           int (*reply_cb)(struct qeth_card *,
5476                                           struct qeth_reply *, unsigned long),
5477                           void *reply_param)
5478 {
5479         int rc;
5480         struct qeth_ipa_cmd *cmd;
5481
5482         QETH_CARD_TEXT(card, 4, "sendassp");
5483
5484         cmd = __ipa_cmd(iob);
5485         if (len <= sizeof(__u32))
5486                 cmd->data.setassparms.data.flags_32bit = (__u32) data;
5487         else   /* (len > sizeof(__u32)) */
5488                 memcpy(&cmd->data.setassparms.data, (void *) data, len);
5489
5490         rc = qeth_send_ipa_cmd(card, iob, reply_cb, reply_param);
5491         return rc;
5492 }
5493 EXPORT_SYMBOL_GPL(qeth_send_setassparms);
5494
5495 int qeth_send_simple_setassparms_prot(struct qeth_card *card,
5496                                       enum qeth_ipa_funcs ipa_func,
5497                                       u16 cmd_code, long data,
5498                                       enum qeth_prot_versions prot)
5499 {
5500         int rc;
5501         int length = 0;
5502         struct qeth_cmd_buffer *iob;
5503
5504         QETH_CARD_TEXT_(card, 4, "simassp%i", prot);
5505         if (data)
5506                 length = sizeof(__u32);
5507         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code, length, prot);
5508         if (!iob)
5509                 return -ENOMEM;
5510         rc = qeth_send_setassparms(card, iob, length, data,
5511                                    qeth_setassparms_cb, NULL);
5512         return rc;
5513 }
5514 EXPORT_SYMBOL_GPL(qeth_send_simple_setassparms_prot);
5515
5516 static void qeth_unregister_dbf_views(void)
5517 {
5518         int x;
5519         for (x = 0; x < QETH_DBF_INFOS; x++) {
5520                 debug_unregister(qeth_dbf[x].id);
5521                 qeth_dbf[x].id = NULL;
5522         }
5523 }
5524
5525 void qeth_dbf_longtext(debug_info_t *id, int level, char *fmt, ...)
5526 {
5527         char dbf_txt_buf[32];
5528         va_list args;
5529
5530         if (!debug_level_enabled(id, level))
5531                 return;
5532         va_start(args, fmt);
5533         vsnprintf(dbf_txt_buf, sizeof(dbf_txt_buf), fmt, args);
5534         va_end(args);
5535         debug_text_event(id, level, dbf_txt_buf);
5536 }
5537 EXPORT_SYMBOL_GPL(qeth_dbf_longtext);
5538
5539 static int qeth_register_dbf_views(void)
5540 {
5541         int ret;
5542         int x;
5543
5544         for (x = 0; x < QETH_DBF_INFOS; x++) {
5545                 /* register the areas */
5546                 qeth_dbf[x].id = debug_register(qeth_dbf[x].name,
5547                                                 qeth_dbf[x].pages,
5548                                                 qeth_dbf[x].areas,
5549                                                 qeth_dbf[x].len);
5550                 if (qeth_dbf[x].id == NULL) {
5551                         qeth_unregister_dbf_views();
5552                         return -ENOMEM;
5553                 }
5554
5555                 /* register a view */
5556                 ret = debug_register_view(qeth_dbf[x].id, qeth_dbf[x].view);
5557                 if (ret) {
5558                         qeth_unregister_dbf_views();
5559                         return ret;
5560                 }
5561
5562                 /* set a passing level */
5563                 debug_set_level(qeth_dbf[x].id, qeth_dbf[x].level);
5564         }
5565
5566         return 0;
5567 }
5568
5569 static DEFINE_MUTEX(qeth_mod_mutex);    /* for synchronized module loading */
5570
5571 int qeth_core_load_discipline(struct qeth_card *card,
5572                 enum qeth_discipline_id discipline)
5573 {
5574         mutex_lock(&qeth_mod_mutex);
5575         switch (discipline) {
5576         case QETH_DISCIPLINE_LAYER3:
5577                 card->discipline = try_then_request_module(
5578                         symbol_get(qeth_l3_discipline), "qeth_l3");
5579                 break;
5580         case QETH_DISCIPLINE_LAYER2:
5581                 card->discipline = try_then_request_module(
5582                         symbol_get(qeth_l2_discipline), "qeth_l2");
5583                 break;
5584         default:
5585                 break;
5586         }
5587         mutex_unlock(&qeth_mod_mutex);
5588
5589         if (!card->discipline) {
5590                 dev_err(&card->gdev->dev, "There is no kernel module to "
5591                         "support discipline %d\n", discipline);
5592                 return -EINVAL;
5593         }
5594
5595         card->options.layer = discipline;
5596         return 0;
5597 }
5598
5599 void qeth_core_free_discipline(struct qeth_card *card)
5600 {
5601         if (IS_LAYER2(card))
5602                 symbol_put(qeth_l2_discipline);
5603         else
5604                 symbol_put(qeth_l3_discipline);
5605         card->options.layer = QETH_DISCIPLINE_UNDETERMINED;
5606         card->discipline = NULL;
5607 }
5608
5609 const struct device_type qeth_generic_devtype = {
5610         .name = "qeth_generic",
5611         .groups = qeth_generic_attr_groups,
5612 };
5613 EXPORT_SYMBOL_GPL(qeth_generic_devtype);
5614
5615 static const struct device_type qeth_osn_devtype = {
5616         .name = "qeth_osn",
5617         .groups = qeth_osn_attr_groups,
5618 };
5619
5620 #define DBF_NAME_LEN    20
5621
5622 struct qeth_dbf_entry {
5623         char dbf_name[DBF_NAME_LEN];
5624         debug_info_t *dbf_info;
5625         struct list_head dbf_list;
5626 };
5627
5628 static LIST_HEAD(qeth_dbf_list);
5629 static DEFINE_MUTEX(qeth_dbf_list_mutex);
5630
5631 static debug_info_t *qeth_get_dbf_entry(char *name)
5632 {
5633         struct qeth_dbf_entry *entry;
5634         debug_info_t *rc = NULL;
5635
5636         mutex_lock(&qeth_dbf_list_mutex);
5637         list_for_each_entry(entry, &qeth_dbf_list, dbf_list) {
5638                 if (strcmp(entry->dbf_name, name) == 0) {
5639                         rc = entry->dbf_info;
5640                         break;
5641                 }
5642         }
5643         mutex_unlock(&qeth_dbf_list_mutex);
5644         return rc;
5645 }
5646
5647 static int qeth_add_dbf_entry(struct qeth_card *card, char *name)
5648 {
5649         struct qeth_dbf_entry *new_entry;
5650
5651         card->debug = debug_register(name, 2, 1, 8);
5652         if (!card->debug) {
5653                 QETH_DBF_TEXT_(SETUP, 2, "%s", "qcdbf");
5654                 goto err;
5655         }
5656         if (debug_register_view(card->debug, &debug_hex_ascii_view))
5657                 goto err_dbg;
5658         new_entry = kzalloc(sizeof(struct qeth_dbf_entry), GFP_KERNEL);
5659         if (!new_entry)
5660                 goto err_dbg;
5661         strncpy(new_entry->dbf_name, name, DBF_NAME_LEN);
5662         new_entry->dbf_info = card->debug;
5663         mutex_lock(&qeth_dbf_list_mutex);
5664         list_add(&new_entry->dbf_list, &qeth_dbf_list);
5665         mutex_unlock(&qeth_dbf_list_mutex);
5666
5667         return 0;
5668
5669 err_dbg:
5670         debug_unregister(card->debug);
5671 err:
5672         return -ENOMEM;
5673 }
5674
5675 static void qeth_clear_dbf_list(void)
5676 {
5677         struct qeth_dbf_entry *entry, *tmp;
5678
5679         mutex_lock(&qeth_dbf_list_mutex);
5680         list_for_each_entry_safe(entry, tmp, &qeth_dbf_list, dbf_list) {
5681                 list_del(&entry->dbf_list);
5682                 debug_unregister(entry->dbf_info);
5683                 kfree(entry);
5684         }
5685         mutex_unlock(&qeth_dbf_list_mutex);
5686 }
5687
5688 static struct net_device *qeth_alloc_netdev(struct qeth_card *card)
5689 {
5690         struct net_device *dev;
5691
5692         switch (card->info.type) {
5693         case QETH_CARD_TYPE_IQD:
5694                 dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN, ether_setup);
5695                 break;
5696         case QETH_CARD_TYPE_OSN:
5697                 dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN, ether_setup);
5698                 break;
5699         default:
5700                 dev = alloc_etherdev(0);
5701         }
5702
5703         if (!dev)
5704                 return NULL;
5705
5706         dev->ml_priv = card;
5707         dev->watchdog_timeo = QETH_TX_TIMEOUT;
5708         dev->min_mtu = IS_OSN(card) ? 64 : 576;
5709          /* initialized when device first goes online: */
5710         dev->max_mtu = 0;
5711         dev->mtu = 0;
5712         SET_NETDEV_DEV(dev, &card->gdev->dev);
5713         netif_carrier_off(dev);
5714
5715         if (!IS_OSN(card)) {
5716                 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
5717                 dev->hw_features |= NETIF_F_SG;
5718                 dev->vlan_features |= NETIF_F_SG;
5719                 if (IS_IQD(card))
5720                         dev->features |= NETIF_F_SG;
5721         }
5722
5723         return dev;
5724 }
5725
5726 struct net_device *qeth_clone_netdev(struct net_device *orig)
5727 {
5728         struct net_device *clone = qeth_alloc_netdev(orig->ml_priv);
5729
5730         if (!clone)
5731                 return NULL;
5732
5733         clone->dev_port = orig->dev_port;
5734         return clone;
5735 }
5736
5737 static int qeth_core_probe_device(struct ccwgroup_device *gdev)
5738 {
5739         struct qeth_card *card;
5740         struct device *dev;
5741         int rc;
5742         enum qeth_discipline_id enforced_disc;
5743         char dbf_name[DBF_NAME_LEN];
5744
5745         QETH_DBF_TEXT(SETUP, 2, "probedev");
5746
5747         dev = &gdev->dev;
5748         if (!get_device(dev))
5749                 return -ENODEV;
5750
5751         QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));
5752
5753         card = qeth_alloc_card(gdev);
5754         if (!card) {
5755                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
5756                 rc = -ENOMEM;
5757                 goto err_dev;
5758         }
5759
5760         snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
5761                 dev_name(&gdev->dev));
5762         card->debug = qeth_get_dbf_entry(dbf_name);
5763         if (!card->debug) {
5764                 rc = qeth_add_dbf_entry(card, dbf_name);
5765                 if (rc)
5766                         goto err_card;
5767         }
5768
5769         qeth_setup_card(card);
5770         qeth_update_from_chp_desc(card);
5771
5772         card->dev = qeth_alloc_netdev(card);
5773         if (!card->dev) {
5774                 rc = -ENOMEM;
5775                 goto err_card;
5776         }
5777
5778         qeth_determine_capabilities(card);
5779         enforced_disc = qeth_enforce_discipline(card);
5780         switch (enforced_disc) {
5781         case QETH_DISCIPLINE_UNDETERMINED:
5782                 gdev->dev.type = &qeth_generic_devtype;
5783                 break;
5784         default:
5785                 card->info.layer_enforced = true;
5786                 rc = qeth_core_load_discipline(card, enforced_disc);
5787                 if (rc)
5788                         goto err_load;
5789
5790                 gdev->dev.type = (card->info.type != QETH_CARD_TYPE_OSN)
5791                                         ? card->discipline->devtype
5792                                         : &qeth_osn_devtype;
5793                 rc = card->discipline->setup(card->gdev);
5794                 if (rc)
5795                         goto err_disc;
5796                 break;
5797         }
5798
5799         write_lock_irq(&qeth_core_card_list.rwlock);
5800         list_add_tail(&card->list, &qeth_core_card_list.list);
5801         write_unlock_irq(&qeth_core_card_list.rwlock);
5802         return 0;
5803
5804 err_disc:
5805         qeth_core_free_discipline(card);
5806 err_load:
5807         free_netdev(card->dev);
5808 err_card:
5809         qeth_core_free_card(card);
5810 err_dev:
5811         put_device(dev);
5812         return rc;
5813 }
5814
5815 static void qeth_core_remove_device(struct ccwgroup_device *gdev)
5816 {
5817         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5818
5819         QETH_DBF_TEXT(SETUP, 2, "removedv");
5820
5821         if (card->discipline) {
5822                 card->discipline->remove(gdev);
5823                 qeth_core_free_discipline(card);
5824         }
5825
5826         write_lock_irq(&qeth_core_card_list.rwlock);
5827         list_del(&card->list);
5828         write_unlock_irq(&qeth_core_card_list.rwlock);
5829         free_netdev(card->dev);
5830         qeth_core_free_card(card);
5831         put_device(&gdev->dev);
5832 }
5833
5834 static int qeth_core_set_online(struct ccwgroup_device *gdev)
5835 {
5836         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5837         int rc = 0;
5838         enum qeth_discipline_id def_discipline;
5839
5840         if (!card->discipline) {
5841                 if (card->info.type == QETH_CARD_TYPE_IQD)
5842                         def_discipline = QETH_DISCIPLINE_LAYER3;
5843                 else
5844                         def_discipline = QETH_DISCIPLINE_LAYER2;
5845                 rc = qeth_core_load_discipline(card, def_discipline);
5846                 if (rc)
5847                         goto err;
5848                 rc = card->discipline->setup(card->gdev);
5849                 if (rc) {
5850                         qeth_core_free_discipline(card);
5851                         goto err;
5852                 }
5853         }
5854         rc = card->discipline->set_online(gdev);
5855 err:
5856         return rc;
5857 }
5858
5859 static int qeth_core_set_offline(struct ccwgroup_device *gdev)
5860 {
5861         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5862         return card->discipline->set_offline(gdev);
5863 }
5864
5865 static void qeth_core_shutdown(struct ccwgroup_device *gdev)
5866 {
5867         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5868         qeth_set_allowed_threads(card, 0, 1);
5869         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
5870                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
5871         qeth_qdio_clear_card(card, 0);
5872         qeth_clear_qdio_buffers(card);
5873         qdio_free(CARD_DDEV(card));
5874 }
5875
5876 static int qeth_core_freeze(struct ccwgroup_device *gdev)
5877 {
5878         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5879         if (card->discipline && card->discipline->freeze)
5880                 return card->discipline->freeze(gdev);
5881         return 0;
5882 }
5883
5884 static int qeth_core_thaw(struct ccwgroup_device *gdev)
5885 {
5886         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5887         if (card->discipline && card->discipline->thaw)
5888                 return card->discipline->thaw(gdev);
5889         return 0;
5890 }
5891
5892 static int qeth_core_restore(struct ccwgroup_device *gdev)
5893 {
5894         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
5895         if (card->discipline && card->discipline->restore)
5896                 return card->discipline->restore(gdev);
5897         return 0;
5898 }
5899
5900 static ssize_t group_store(struct device_driver *ddrv, const char *buf,
5901                            size_t count)
5902 {
5903         int err;
5904
5905         err = ccwgroup_create_dev(qeth_core_root_dev, to_ccwgroupdrv(ddrv), 3,
5906                                   buf);
5907
5908         return err ? err : count;
5909 }
5910 static DRIVER_ATTR_WO(group);
5911
5912 static struct attribute *qeth_drv_attrs[] = {
5913         &driver_attr_group.attr,
5914         NULL,
5915 };
5916 static struct attribute_group qeth_drv_attr_group = {
5917         .attrs = qeth_drv_attrs,
5918 };
5919 static const struct attribute_group *qeth_drv_attr_groups[] = {
5920         &qeth_drv_attr_group,
5921         NULL,
5922 };
5923
5924 static struct ccwgroup_driver qeth_core_ccwgroup_driver = {
5925         .driver = {
5926                 .groups = qeth_drv_attr_groups,
5927                 .owner = THIS_MODULE,
5928                 .name = "qeth",
5929         },
5930         .ccw_driver = &qeth_ccw_driver,
5931         .setup = qeth_core_probe_device,
5932         .remove = qeth_core_remove_device,
5933         .set_online = qeth_core_set_online,
5934         .set_offline = qeth_core_set_offline,
5935         .shutdown = qeth_core_shutdown,
5936         .prepare = NULL,
5937         .complete = NULL,
5938         .freeze = qeth_core_freeze,
5939         .thaw = qeth_core_thaw,
5940         .restore = qeth_core_restore,
5941 };
5942
5943 int qeth_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
5944 {
5945         struct qeth_card *card = dev->ml_priv;
5946         struct mii_ioctl_data *mii_data;
5947         int rc = 0;
5948
5949         if (!card)
5950                 return -ENODEV;
5951
5952         if (!qeth_card_hw_is_reachable(card))
5953                 return -ENODEV;
5954
5955         if (card->info.type == QETH_CARD_TYPE_OSN)
5956                 return -EPERM;
5957
5958         switch (cmd) {
5959         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
5960                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
5961                 break;
5962         case SIOC_QETH_GET_CARD_TYPE:
5963                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
5964                      card->info.type == QETH_CARD_TYPE_OSM ||
5965                      card->info.type == QETH_CARD_TYPE_OSX) &&
5966                     !card->info.guestlan)
5967                         return 1;
5968                 else
5969                         return 0;
5970         case SIOCGMIIPHY:
5971                 mii_data = if_mii(rq);
5972                 mii_data->phy_id = 0;
5973                 break;
5974         case SIOCGMIIREG:
5975                 mii_data = if_mii(rq);
5976                 if (mii_data->phy_id != 0)
5977                         rc = -EINVAL;
5978                 else
5979                         mii_data->val_out = qeth_mdio_read(dev,
5980                                 mii_data->phy_id, mii_data->reg_num);
5981                 break;
5982         case SIOC_QETH_QUERY_OAT:
5983                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
5984                 break;
5985         default:
5986                 if (card->discipline->do_ioctl)
5987                         rc = card->discipline->do_ioctl(dev, rq, cmd);
5988                 else
5989                         rc = -EOPNOTSUPP;
5990         }
5991         if (rc)
5992                 QETH_CARD_TEXT_(card, 2, "ioce%x", rc);
5993         return rc;
5994 }
5995 EXPORT_SYMBOL_GPL(qeth_do_ioctl);
5996
5997 static struct {
5998         const char str[ETH_GSTRING_LEN];
5999 } qeth_ethtool_stats_keys[] = {
6000 /*  0 */{"rx skbs"},
6001         {"rx buffers"},
6002         {"tx skbs"},
6003         {"tx buffers"},
6004         {"tx skbs no packing"},
6005         {"tx buffers no packing"},
6006         {"tx skbs packing"},
6007         {"tx buffers packing"},
6008         {"tx sg skbs"},
6009         {"tx buffer elements"},
6010 /* 10 */{"rx sg skbs"},
6011         {"rx sg frags"},
6012         {"rx sg page allocs"},
6013         {"tx large kbytes"},
6014         {"tx large count"},
6015         {"tx pk state ch n->p"},
6016         {"tx pk state ch p->n"},
6017         {"tx pk watermark low"},
6018         {"tx pk watermark high"},
6019         {"queue 0 buffer usage"},
6020 /* 20 */{"queue 1 buffer usage"},
6021         {"queue 2 buffer usage"},
6022         {"queue 3 buffer usage"},
6023         {"rx poll time"},
6024         {"rx poll count"},
6025         {"rx do_QDIO time"},
6026         {"rx do_QDIO count"},
6027         {"tx handler time"},
6028         {"tx handler count"},
6029         {"tx time"},
6030 /* 30 */{"tx count"},
6031         {"tx do_QDIO time"},
6032         {"tx do_QDIO count"},
6033         {"tx csum"},
6034         {"tx lin"},
6035         {"tx linfail"},
6036         {"cq handler count"},
6037         {"cq handler time"},
6038         {"rx csum"}
6039 };
6040
6041 int qeth_core_get_sset_count(struct net_device *dev, int stringset)
6042 {
6043         switch (stringset) {
6044         case ETH_SS_STATS:
6045                 return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
6046         default:
6047                 return -EINVAL;
6048         }
6049 }
6050 EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
6051
6052 void qeth_core_get_ethtool_stats(struct net_device *dev,
6053                 struct ethtool_stats *stats, u64 *data)
6054 {
6055         struct qeth_card *card = dev->ml_priv;
6056         data[0] = card->stats.rx_packets -
6057                                 card->perf_stats.initial_rx_packets;
6058         data[1] = card->perf_stats.bufs_rec;
6059         data[2] = card->stats.tx_packets -
6060                                 card->perf_stats.initial_tx_packets;
6061         data[3] = card->perf_stats.bufs_sent;
6062         data[4] = card->stats.tx_packets - card->perf_stats.initial_tx_packets
6063                         - card->perf_stats.skbs_sent_pack;
6064         data[5] = card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack;
6065         data[6] = card->perf_stats.skbs_sent_pack;
6066         data[7] = card->perf_stats.bufs_sent_pack;
6067         data[8] = card->perf_stats.sg_skbs_sent;
6068         data[9] = card->perf_stats.buf_elements_sent;
6069         data[10] = card->perf_stats.sg_skbs_rx;
6070         data[11] = card->perf_stats.sg_frags_rx;
6071         data[12] = card->perf_stats.sg_alloc_page_rx;
6072         data[13] = (card->perf_stats.large_send_bytes >> 10);
6073         data[14] = card->perf_stats.large_send_cnt;
6074         data[15] = card->perf_stats.sc_dp_p;
6075         data[16] = card->perf_stats.sc_p_dp;
6076         data[17] = QETH_LOW_WATERMARK_PACK;
6077         data[18] = QETH_HIGH_WATERMARK_PACK;
6078         data[19] = atomic_read(&card->qdio.out_qs[0]->used_buffers);
6079         data[20] = (card->qdio.no_out_queues > 1) ?
6080                         atomic_read(&card->qdio.out_qs[1]->used_buffers) : 0;
6081         data[21] = (card->qdio.no_out_queues > 2) ?
6082                         atomic_read(&card->qdio.out_qs[2]->used_buffers) : 0;
6083         data[22] = (card->qdio.no_out_queues > 3) ?
6084                         atomic_read(&card->qdio.out_qs[3]->used_buffers) : 0;
6085         data[23] = card->perf_stats.inbound_time;
6086         data[24] = card->perf_stats.inbound_cnt;
6087         data[25] = card->perf_stats.inbound_do_qdio_time;
6088         data[26] = card->perf_stats.inbound_do_qdio_cnt;
6089         data[27] = card->perf_stats.outbound_handler_time;
6090         data[28] = card->perf_stats.outbound_handler_cnt;
6091         data[29] = card->perf_stats.outbound_time;
6092         data[30] = card->perf_stats.outbound_cnt;
6093         data[31] = card->perf_stats.outbound_do_qdio_time;
6094         data[32] = card->perf_stats.outbound_do_qdio_cnt;
6095         data[33] = card->perf_stats.tx_csum;
6096         data[34] = card->perf_stats.tx_lin;
6097         data[35] = card->perf_stats.tx_linfail;
6098         data[36] = card->perf_stats.cq_cnt;
6099         data[37] = card->perf_stats.cq_time;
6100         data[38] = card->perf_stats.rx_csum;
6101 }
6102 EXPORT_SYMBOL_GPL(qeth_core_get_ethtool_stats);
6103
6104 void qeth_core_get_strings(struct net_device *dev, u32 stringset, u8 *data)
6105 {
6106         switch (stringset) {
6107         case ETH_SS_STATS:
6108                 memcpy(data, &qeth_ethtool_stats_keys,
6109                         sizeof(qeth_ethtool_stats_keys));
6110                 break;
6111         default:
6112                 WARN_ON(1);
6113                 break;
6114         }
6115 }
6116 EXPORT_SYMBOL_GPL(qeth_core_get_strings);
6117
6118 void qeth_core_get_drvinfo(struct net_device *dev,
6119                 struct ethtool_drvinfo *info)
6120 {
6121         struct qeth_card *card = dev->ml_priv;
6122
6123         strlcpy(info->driver, IS_LAYER2(card) ? "qeth_l2" : "qeth_l3",
6124                 sizeof(info->driver));
6125         strlcpy(info->version, "1.0", sizeof(info->version));
6126         strlcpy(info->fw_version, card->info.mcl_level,
6127                 sizeof(info->fw_version));
6128         snprintf(info->bus_info, sizeof(info->bus_info), "%s/%s/%s",
6129                  CARD_RDEV_ID(card), CARD_WDEV_ID(card), CARD_DDEV_ID(card));
6130 }
6131 EXPORT_SYMBOL_GPL(qeth_core_get_drvinfo);
6132
6133 /* Helper function to fill 'advertising' and 'supported' which are the same. */
6134 /* Autoneg and full-duplex are supported and advertised unconditionally.     */
6135 /* Always advertise and support all speeds up to specified, and only one     */
6136 /* specified port type.                                                      */
6137 static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
6138                                 int maxspeed, int porttype)
6139 {
6140         ethtool_link_ksettings_zero_link_mode(cmd, supported);
6141         ethtool_link_ksettings_zero_link_mode(cmd, advertising);
6142         ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
6143
6144         ethtool_link_ksettings_add_link_mode(cmd, supported, Autoneg);
6145         ethtool_link_ksettings_add_link_mode(cmd, advertising, Autoneg);
6146
6147         switch (porttype) {
6148         case PORT_TP:
6149                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6150                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6151                 break;
6152         case PORT_FIBRE:
6153                 ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
6154                 ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
6155                 break;
6156         default:
6157                 ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
6158                 ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
6159                 WARN_ON_ONCE(1);
6160         }
6161
6162         /* fallthrough from high to low, to select all legal speeds: */
6163         switch (maxspeed) {
6164         case SPEED_10000:
6165                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6166                                                      10000baseT_Full);
6167                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6168                                                      10000baseT_Full);
6169         case SPEED_1000:
6170                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6171                                                      1000baseT_Full);
6172                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6173                                                      1000baseT_Full);
6174                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6175                                                      1000baseT_Half);
6176                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6177                                                      1000baseT_Half);
6178         case SPEED_100:
6179                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6180                                                      100baseT_Full);
6181                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6182                                                      100baseT_Full);
6183                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6184                                                      100baseT_Half);
6185                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6186                                                      100baseT_Half);
6187         case SPEED_10:
6188                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6189                                                      10baseT_Full);
6190                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6191                                                      10baseT_Full);
6192                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6193                                                      10baseT_Half);
6194                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6195                                                      10baseT_Half);
6196                 /* end fallthrough */
6197                 break;
6198         default:
6199                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6200                                                      10baseT_Full);
6201                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6202                                                      10baseT_Full);
6203                 ethtool_link_ksettings_add_link_mode(cmd, supported,
6204                                                      10baseT_Half);
6205                 ethtool_link_ksettings_add_link_mode(cmd, advertising,
6206                                                      10baseT_Half);
6207                 WARN_ON_ONCE(1);
6208         }
6209 }
6210
6211 int qeth_core_ethtool_get_link_ksettings(struct net_device *netdev,
6212                 struct ethtool_link_ksettings *cmd)
6213 {
6214         struct qeth_card *card = netdev->ml_priv;
6215         enum qeth_link_types link_type;
6216         struct carrier_info carrier_info;
6217         int rc;
6218
6219         if ((card->info.type == QETH_CARD_TYPE_IQD) || (card->info.guestlan))
6220                 link_type = QETH_LINK_TYPE_10GBIT_ETH;
6221         else
6222                 link_type = card->info.link_type;
6223
6224         cmd->base.duplex = DUPLEX_FULL;
6225         cmd->base.autoneg = AUTONEG_ENABLE;
6226         cmd->base.phy_address = 0;
6227         cmd->base.mdio_support = 0;
6228         cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
6229         cmd->base.eth_tp_mdix_ctrl = ETH_TP_MDI_INVALID;
6230
6231         switch (link_type) {
6232         case QETH_LINK_TYPE_FAST_ETH:
6233         case QETH_LINK_TYPE_LANE_ETH100:
6234                 cmd->base.speed = SPEED_100;
6235                 cmd->base.port = PORT_TP;
6236                 break;
6237         case QETH_LINK_TYPE_GBIT_ETH:
6238         case QETH_LINK_TYPE_LANE_ETH1000:
6239                 cmd->base.speed = SPEED_1000;
6240                 cmd->base.port = PORT_FIBRE;
6241                 break;
6242         case QETH_LINK_TYPE_10GBIT_ETH:
6243                 cmd->base.speed = SPEED_10000;
6244                 cmd->base.port = PORT_FIBRE;
6245                 break;
6246         default:
6247                 cmd->base.speed = SPEED_10;
6248                 cmd->base.port = PORT_TP;
6249         }
6250         qeth_set_cmd_adv_sup(cmd, cmd->base.speed, cmd->base.port);
6251
6252         /* Check if we can obtain more accurate information.     */
6253         /* If QUERY_CARD_INFO command is not supported or fails, */
6254         /* just return the heuristics that was filled above.     */
6255         if (!qeth_card_hw_is_reachable(card))
6256                 return -ENODEV;
6257         rc = qeth_query_card_info(card, &carrier_info);
6258         if (rc == -EOPNOTSUPP) /* for old hardware, return heuristic */
6259                 return 0;
6260         if (rc) /* report error from the hardware operation */
6261                 return rc;
6262         /* on success, fill in the information got from the hardware */
6263
6264         netdev_dbg(netdev,
6265         "card info: card_type=0x%02x, port_mode=0x%04x, port_speed=0x%08x\n",
6266                         carrier_info.card_type,
6267                         carrier_info.port_mode,
6268                         carrier_info.port_speed);
6269
6270         /* Update attributes for which we've obtained more authoritative */
6271         /* information, leave the rest the way they where filled above.  */
6272         switch (carrier_info.card_type) {
6273         case CARD_INFO_TYPE_1G_COPPER_A:
6274         case CARD_INFO_TYPE_1G_COPPER_B:
6275                 cmd->base.port = PORT_TP;
6276                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6277                 break;
6278         case CARD_INFO_TYPE_1G_FIBRE_A:
6279         case CARD_INFO_TYPE_1G_FIBRE_B:
6280                 cmd->base.port = PORT_FIBRE;
6281                 qeth_set_cmd_adv_sup(cmd, SPEED_1000, cmd->base.port);
6282                 break;
6283         case CARD_INFO_TYPE_10G_FIBRE_A:
6284         case CARD_INFO_TYPE_10G_FIBRE_B:
6285                 cmd->base.port = PORT_FIBRE;
6286                 qeth_set_cmd_adv_sup(cmd, SPEED_10000, cmd->base.port);
6287                 break;
6288         }
6289
6290         switch (carrier_info.port_mode) {
6291         case CARD_INFO_PORTM_FULLDUPLEX:
6292                 cmd->base.duplex = DUPLEX_FULL;
6293                 break;
6294         case CARD_INFO_PORTM_HALFDUPLEX:
6295                 cmd->base.duplex = DUPLEX_HALF;
6296                 break;
6297         }
6298
6299         switch (carrier_info.port_speed) {
6300         case CARD_INFO_PORTS_10M:
6301                 cmd->base.speed = SPEED_10;
6302                 break;
6303         case CARD_INFO_PORTS_100M:
6304                 cmd->base.speed = SPEED_100;
6305                 break;
6306         case CARD_INFO_PORTS_1G:
6307                 cmd->base.speed = SPEED_1000;
6308                 break;
6309         case CARD_INFO_PORTS_10G:
6310                 cmd->base.speed = SPEED_10000;
6311                 break;
6312         }
6313
6314         return 0;
6315 }
6316 EXPORT_SYMBOL_GPL(qeth_core_ethtool_get_link_ksettings);
6317
6318 /* Callback to handle checksum offload command reply from OSA card.
6319  * Verify that required features have been enabled on the card.
6320  * Return error in hdr->return_code as this value is checked by caller.
6321  *
6322  * Always returns zero to indicate no further messages from the OSA card.
6323  */
6324 static int qeth_ipa_checksum_run_cmd_cb(struct qeth_card *card,
6325                                         struct qeth_reply *reply,
6326                                         unsigned long data)
6327 {
6328         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6329         struct qeth_checksum_cmd *chksum_cb =
6330                                 (struct qeth_checksum_cmd *)reply->param;
6331
6332         QETH_CARD_TEXT(card, 4, "chkdoccb");
6333         if (qeth_setassparms_inspect_rc(cmd))
6334                 return 0;
6335
6336         memset(chksum_cb, 0, sizeof(*chksum_cb));
6337         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_START) {
6338                 chksum_cb->supported =
6339                                 cmd->data.setassparms.data.chksum.supported;
6340                 QETH_CARD_TEXT_(card, 3, "strt:%x", chksum_cb->supported);
6341         }
6342         if (cmd->data.setassparms.hdr.command_code == IPA_CMD_ASS_ENABLE) {
6343                 chksum_cb->supported =
6344                                 cmd->data.setassparms.data.chksum.supported;
6345                 chksum_cb->enabled =
6346                                 cmd->data.setassparms.data.chksum.enabled;
6347                 QETH_CARD_TEXT_(card, 3, "supp:%x", chksum_cb->supported);
6348                 QETH_CARD_TEXT_(card, 3, "enab:%x", chksum_cb->enabled);
6349         }
6350         return 0;
6351 }
6352
6353 /* Send command to OSA card and check results. */
6354 static int qeth_ipa_checksum_run_cmd(struct qeth_card *card,
6355                                      enum qeth_ipa_funcs ipa_func,
6356                                      __u16 cmd_code, long data,
6357                                      struct qeth_checksum_cmd *chksum_cb,
6358                                      enum qeth_prot_versions prot)
6359 {
6360         struct qeth_cmd_buffer *iob;
6361         int rc = -ENOMEM;
6362
6363         QETH_CARD_TEXT(card, 4, "chkdocmd");
6364         iob = qeth_get_setassparms_cmd(card, ipa_func, cmd_code,
6365                                        sizeof(__u32), prot);
6366         if (iob)
6367                 rc = qeth_send_setassparms(card, iob, sizeof(__u32), data,
6368                                            qeth_ipa_checksum_run_cmd_cb,
6369                                            chksum_cb);
6370         return rc;
6371 }
6372
6373 static int qeth_send_checksum_on(struct qeth_card *card, int cstype,
6374                                  enum qeth_prot_versions prot)
6375 {
6376         u32 required_features = QETH_IPA_CHECKSUM_UDP | QETH_IPA_CHECKSUM_TCP;
6377         struct qeth_checksum_cmd chksum_cb;
6378         int rc;
6379
6380         if (prot == QETH_PROT_IPV4)
6381                 required_features |= QETH_IPA_CHECKSUM_IP_HDR;
6382         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_START, 0,
6383                                        &chksum_cb, prot);
6384         if (!rc) {
6385                 if ((required_features & chksum_cb.supported) !=
6386                     required_features)
6387                         rc = -EIO;
6388                 else if (!(QETH_IPA_CHECKSUM_LP2LP & chksum_cb.supported) &&
6389                          cstype == IPA_INBOUND_CHECKSUM)
6390                         dev_warn(&card->gdev->dev,
6391                                  "Hardware checksumming is performed only if %s and its peer use different OSA Express 3 ports\n",
6392                                  QETH_CARD_IFNAME(card));
6393         }
6394         if (rc) {
6395                 qeth_send_simple_setassparms_prot(card, cstype,
6396                                                   IPA_CMD_ASS_STOP, 0, prot);
6397                 dev_warn(&card->gdev->dev,
6398                          "Starting HW IPv%d checksumming for %s failed, using SW checksumming\n",
6399                          prot, QETH_CARD_IFNAME(card));
6400                 return rc;
6401         }
6402         rc = qeth_ipa_checksum_run_cmd(card, cstype, IPA_CMD_ASS_ENABLE,
6403                                        chksum_cb.supported, &chksum_cb,
6404                                        prot);
6405         if (!rc) {
6406                 if ((required_features & chksum_cb.enabled) !=
6407                     required_features)
6408                         rc = -EIO;
6409         }
6410         if (rc) {
6411                 qeth_send_simple_setassparms_prot(card, cstype,
6412                                                   IPA_CMD_ASS_STOP, 0, prot);
6413                 dev_warn(&card->gdev->dev,
6414                          "Enabling HW IPv%d checksumming for %s failed, using SW checksumming\n",
6415                          prot, QETH_CARD_IFNAME(card));
6416                 return rc;
6417         }
6418
6419         dev_info(&card->gdev->dev, "HW Checksumming (%sbound IPv%d) enabled\n",
6420                  cstype == IPA_INBOUND_CHECKSUM ? "in" : "out", prot);
6421         return 0;
6422 }
6423
6424 static int qeth_set_ipa_csum(struct qeth_card *card, bool on, int cstype,
6425                              enum qeth_prot_versions prot)
6426 {
6427         int rc = (on) ? qeth_send_checksum_on(card, cstype, prot)
6428                       : qeth_send_simple_setassparms_prot(card, cstype,
6429                                                           IPA_CMD_ASS_STOP, 0,
6430                                                           prot);
6431         return rc ? -EIO : 0;
6432 }
6433
6434 static int qeth_start_tso_cb(struct qeth_card *card, struct qeth_reply *reply,
6435                              unsigned long data)
6436 {
6437         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
6438         struct qeth_tso_start_data *tso_data = reply->param;
6439
6440         if (qeth_setassparms_inspect_rc(cmd))
6441                 return 0;
6442
6443         tso_data->mss = cmd->data.setassparms.data.tso.mss;
6444         tso_data->supported = cmd->data.setassparms.data.tso.supported;
6445         return 0;
6446 }
6447
6448 static int qeth_set_tso_off(struct qeth_card *card,
6449                             enum qeth_prot_versions prot)
6450 {
6451         return qeth_send_simple_setassparms_prot(card, IPA_OUTBOUND_TSO,
6452                                                  IPA_CMD_ASS_STOP, 0, prot);
6453 }
6454
6455 static int qeth_set_tso_on(struct qeth_card *card,
6456                            enum qeth_prot_versions prot)
6457 {
6458         struct qeth_tso_start_data tso_data;
6459         struct qeth_cmd_buffer *iob;
6460         struct qeth_ipa_caps caps;
6461         int rc;
6462
6463         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6464                                        IPA_CMD_ASS_START, 0, prot);
6465         if (!iob)
6466                 return -ENOMEM;
6467
6468         rc = qeth_send_setassparms(card, iob, 0, 0 /* unused */,
6469                                    qeth_start_tso_cb, &tso_data);
6470         if (rc)
6471                 return rc;
6472
6473         if (!tso_data.mss || !(tso_data.supported & QETH_IPA_LARGE_SEND_TCP)) {
6474                 qeth_set_tso_off(card, prot);
6475                 return -EOPNOTSUPP;
6476         }
6477
6478         iob = qeth_get_setassparms_cmd(card, IPA_OUTBOUND_TSO,
6479                                        IPA_CMD_ASS_ENABLE, sizeof(caps), prot);
6480         if (!iob) {
6481                 qeth_set_tso_off(card, prot);
6482                 return -ENOMEM;
6483         }
6484
6485         /* enable TSO capability */
6486         caps.supported = 0;
6487         caps.enabled = QETH_IPA_LARGE_SEND_TCP;
6488         rc = qeth_send_setassparms(card, iob, sizeof(caps), (long) &caps,
6489                                    qeth_setassparms_get_caps_cb, &caps);
6490         if (rc) {
6491                 qeth_set_tso_off(card, prot);
6492                 return rc;
6493         }
6494
6495         if (!qeth_ipa_caps_supported(&caps, QETH_IPA_LARGE_SEND_TCP) ||
6496             !qeth_ipa_caps_enabled(&caps, QETH_IPA_LARGE_SEND_TCP)) {
6497                 qeth_set_tso_off(card, prot);
6498                 return -EOPNOTSUPP;
6499         }
6500
6501         dev_info(&card->gdev->dev, "TSOv%u enabled (MSS: %u)\n", prot,
6502                  tso_data.mss);
6503         return 0;
6504 }
6505
6506 static int qeth_set_ipa_tso(struct qeth_card *card, bool on,
6507                             enum qeth_prot_versions prot)
6508 {
6509         int rc = on ? qeth_set_tso_on(card, prot) :
6510                       qeth_set_tso_off(card, prot);
6511
6512         return rc ? -EIO : 0;
6513 }
6514
6515 static int qeth_set_ipa_rx_csum(struct qeth_card *card, bool on)
6516 {
6517         int rc_ipv4 = (on) ? -EOPNOTSUPP : 0;
6518         int rc_ipv6;
6519
6520         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
6521                 rc_ipv4 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6522                                             QETH_PROT_IPV4);
6523         if (!qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6524                 /* no/one Offload Assist available, so the rc is trivial */
6525                 return rc_ipv4;
6526
6527         rc_ipv6 = qeth_set_ipa_csum(card, on, IPA_INBOUND_CHECKSUM,
6528                                     QETH_PROT_IPV6);
6529
6530         if (on)
6531                 /* enable: success if any Assist is active */
6532                 return (rc_ipv6) ? rc_ipv4 : 0;
6533
6534         /* disable: failure if any Assist is still active */
6535         return (rc_ipv6) ? rc_ipv6 : rc_ipv4;
6536 }
6537
6538 #define QETH_HW_FEATURES (NETIF_F_RXCSUM | NETIF_F_IP_CSUM | NETIF_F_TSO | \
6539                           NETIF_F_IPV6_CSUM | NETIF_F_TSO6)
6540 /**
6541  * qeth_enable_hw_features() - (Re-)Enable HW functions for device features
6542  * @dev:        a net_device
6543  */
6544 void qeth_enable_hw_features(struct net_device *dev)
6545 {
6546         struct qeth_card *card = dev->ml_priv;
6547         netdev_features_t features;
6548
6549         rtnl_lock();
6550         features = dev->features;
6551         /* force-off any feature that needs an IPA sequence.
6552          * netdev_update_features() will restart them.
6553          */
6554         dev->features &= ~QETH_HW_FEATURES;
6555         netdev_update_features(dev);
6556         if (features != dev->features)
6557                 dev_warn(&card->gdev->dev,
6558                          "Device recovery failed to restore all offload features\n");
6559         rtnl_unlock();
6560 }
6561 EXPORT_SYMBOL_GPL(qeth_enable_hw_features);
6562
6563 int qeth_set_features(struct net_device *dev, netdev_features_t features)
6564 {
6565         struct qeth_card *card = dev->ml_priv;
6566         netdev_features_t changed = dev->features ^ features;
6567         int rc = 0;
6568
6569         QETH_DBF_TEXT(SETUP, 2, "setfeat");
6570         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6571
6572         if ((changed & NETIF_F_IP_CSUM)) {
6573                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IP_CSUM,
6574                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV4);
6575                 if (rc)
6576                         changed ^= NETIF_F_IP_CSUM;
6577         }
6578         if (changed & NETIF_F_IPV6_CSUM) {
6579                 rc = qeth_set_ipa_csum(card, features & NETIF_F_IPV6_CSUM,
6580                                        IPA_OUTBOUND_CHECKSUM, QETH_PROT_IPV6);
6581                 if (rc)
6582                         changed ^= NETIF_F_IPV6_CSUM;
6583         }
6584         if (changed & NETIF_F_RXCSUM) {
6585                 rc = qeth_set_ipa_rx_csum(card, features & NETIF_F_RXCSUM);
6586                 if (rc)
6587                         changed ^= NETIF_F_RXCSUM;
6588         }
6589         if (changed & NETIF_F_TSO) {
6590                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO,
6591                                       QETH_PROT_IPV4);
6592                 if (rc)
6593                         changed ^= NETIF_F_TSO;
6594         }
6595         if (changed & NETIF_F_TSO6) {
6596                 rc = qeth_set_ipa_tso(card, features & NETIF_F_TSO6,
6597                                       QETH_PROT_IPV6);
6598                 if (rc)
6599                         changed ^= NETIF_F_TSO6;
6600         }
6601
6602         /* everything changed successfully? */
6603         if ((dev->features ^ features) == changed)
6604                 return 0;
6605         /* something went wrong. save changed features and return error */
6606         dev->features ^= changed;
6607         return -EIO;
6608 }
6609 EXPORT_SYMBOL_GPL(qeth_set_features);
6610
6611 netdev_features_t qeth_fix_features(struct net_device *dev,
6612                                     netdev_features_t features)
6613 {
6614         struct qeth_card *card = dev->ml_priv;
6615
6616         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
6617         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
6618                 features &= ~NETIF_F_IP_CSUM;
6619         if (!qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6))
6620                 features &= ~NETIF_F_IPV6_CSUM;
6621         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM) &&
6622             !qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6))
6623                 features &= ~NETIF_F_RXCSUM;
6624         if (!qeth_is_supported(card, IPA_OUTBOUND_TSO))
6625                 features &= ~NETIF_F_TSO;
6626         if (!qeth_is_supported6(card, IPA_OUTBOUND_TSO))
6627                 features &= ~NETIF_F_TSO6;
6628         /* if the card isn't up, remove features that require hw changes */
6629         if (card->state == CARD_STATE_DOWN ||
6630             card->state == CARD_STATE_RECOVER)
6631                 features &= ~QETH_HW_FEATURES;
6632         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
6633         return features;
6634 }
6635 EXPORT_SYMBOL_GPL(qeth_fix_features);
6636
6637 netdev_features_t qeth_features_check(struct sk_buff *skb,
6638                                       struct net_device *dev,
6639                                       netdev_features_t features)
6640 {
6641         /* GSO segmentation builds skbs with
6642          *      a (small) linear part for the headers, and
6643          *      page frags for the data.
6644          * Compared to a linear skb, the header-only part consumes an
6645          * additional buffer element. This reduces buffer utilization, and
6646          * hurts throughput. So compress small segments into one element.
6647          */
6648         if (netif_needs_gso(skb, features)) {
6649                 /* match skb_segment(): */
6650                 unsigned int doffset = skb->data - skb_mac_header(skb);
6651                 unsigned int hsize = skb_shinfo(skb)->gso_size;
6652                 unsigned int hroom = skb_headroom(skb);
6653
6654                 /* linearize only if resulting skb allocations are order-0: */
6655                 if (SKB_DATA_ALIGN(hroom + doffset + hsize) <= SKB_MAX_HEAD(0))
6656                         features &= ~NETIF_F_SG;
6657         }
6658
6659         return vlan_features_check(skb, features);
6660 }
6661 EXPORT_SYMBOL_GPL(qeth_features_check);
6662
6663 static int __init qeth_core_init(void)
6664 {
6665         int rc;
6666
6667         pr_info("loading core functions\n");
6668         INIT_LIST_HEAD(&qeth_core_card_list.list);
6669         rwlock_init(&qeth_core_card_list.rwlock);
6670
6671         qeth_wq = create_singlethread_workqueue("qeth_wq");
6672         if (!qeth_wq) {
6673                 rc = -ENOMEM;
6674                 goto out_err;
6675         }
6676
6677         rc = qeth_register_dbf_views();
6678         if (rc)
6679                 goto dbf_err;
6680         qeth_core_root_dev = root_device_register("qeth");
6681         rc = PTR_ERR_OR_ZERO(qeth_core_root_dev);
6682         if (rc)
6683                 goto register_err;
6684         qeth_core_header_cache =
6685                 kmem_cache_create("qeth_hdr", QETH_HDR_CACHE_OBJ_SIZE,
6686                                   roundup_pow_of_two(QETH_HDR_CACHE_OBJ_SIZE),
6687                                   0, NULL);
6688         if (!qeth_core_header_cache) {
6689                 rc = -ENOMEM;
6690                 goto slab_err;
6691         }
6692         qeth_qdio_outbuf_cache = kmem_cache_create("qeth_buf",
6693                         sizeof(struct qeth_qdio_out_buffer), 0, 0, NULL);
6694         if (!qeth_qdio_outbuf_cache) {
6695                 rc = -ENOMEM;
6696                 goto cqslab_err;
6697         }
6698         rc = ccw_driver_register(&qeth_ccw_driver);
6699         if (rc)
6700                 goto ccw_err;
6701         rc = ccwgroup_driver_register(&qeth_core_ccwgroup_driver);
6702         if (rc)
6703                 goto ccwgroup_err;
6704
6705         return 0;
6706
6707 ccwgroup_err:
6708         ccw_driver_unregister(&qeth_ccw_driver);
6709 ccw_err:
6710         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6711 cqslab_err:
6712         kmem_cache_destroy(qeth_core_header_cache);
6713 slab_err:
6714         root_device_unregister(qeth_core_root_dev);
6715 register_err:
6716         qeth_unregister_dbf_views();
6717 dbf_err:
6718         destroy_workqueue(qeth_wq);
6719 out_err:
6720         pr_err("Initializing the qeth device driver failed\n");
6721         return rc;
6722 }
6723
6724 static void __exit qeth_core_exit(void)
6725 {
6726         qeth_clear_dbf_list();
6727         destroy_workqueue(qeth_wq);
6728         ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver);
6729         ccw_driver_unregister(&qeth_ccw_driver);
6730         kmem_cache_destroy(qeth_qdio_outbuf_cache);
6731         kmem_cache_destroy(qeth_core_header_cache);
6732         root_device_unregister(qeth_core_root_dev);
6733         qeth_unregister_dbf_views();
6734         pr_info("core functions removed\n");
6735 }
6736
6737 module_init(qeth_core_init);
6738 module_exit(qeth_core_exit);
6739 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
6740 MODULE_DESCRIPTION("qeth core functions");
6741 MODULE_LICENSE("GPL");