release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/isdn/hardware/eicon/um_idi.c

   1 /* $Id: um_idi.c,v 1.14 2004/03/21 17:54:37 Exp $ */
   2
   3 #include "platform.h"
   4 #include "di_defs.h"
   5 #include "pc.h"
   6 #include "dqueue.h"
   7 #include "adapter.h"
   8 #include "entity.h"
   9 #include "um_xdi.h"
  10 #include "um_idi.h"
  11 #include "debuglib.h"
  12 #include "divasync.h"
  13
  14 #define DIVAS_MAX_XDI_ADAPTERS  64
  15
  16 /* --------------------------------------------------------------------------
  17                 IMPORTS
  18    -------------------------------------------------------------------------- */
  19 extern void diva_os_wakeup_read(void *os_context);
  20 extern void diva_os_wakeup_close(void *os_context);
  21 /* --------------------------------------------------------------------------
  22                 LOCALS
  23    -------------------------------------------------------------------------- */
  24 static LIST_HEAD(adapter_q);
  25 static diva_os_spin_lock_t adapter_lock;
  26
  27 static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr);
  28 static void cleanup_adapter(diva_um_idi_adapter_t * a);
  29 static void cleanup_entity(divas_um_idi_entity_t * e);
  30 static int diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t * a,
  31                                                diva_um_idi_adapter_features_t
  32                                                * features);
  33 static int process_idi_request(divas_um_idi_entity_t * e,
  34                                const diva_um_idi_req_hdr_t * req);
  35 static int process_idi_rc(divas_um_idi_entity_t * e, byte rc);
  36 static int process_idi_ind(divas_um_idi_entity_t * e, byte ind);
  37 static int write_return_code(divas_um_idi_entity_t * e, byte rc);
  38
  39 /* --------------------------------------------------------------------------
  40                 MAIN
  41    -------------------------------------------------------------------------- */
  42 int diva_user_mode_idi_init(void)
  43 {
  44         diva_os_initialize_spin_lock(&adapter_lock, "adapter");
  45         return (0);
  46 }
  47
  48 /* --------------------------------------------------------------------------
  49                 Copy adapter features to user supplied buffer
  50    -------------------------------------------------------------------------- */
  51 static int
  52 diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t * a,
  53                                     diva_um_idi_adapter_features_t *
  54                                     features)
  55 {
  56         IDI_SYNC_REQ sync_req;
  57
  58         if ((a) && (a->d.request)) {
  59                 features->type = a->d.type;
  60                 features->features = a->d.features;
  61                 features->channels = a->d.channels;
  62                 memset(features->name, 0, sizeof(features->name));
  63
  64                 sync_req.GetName.Req = 0;
  65                 sync_req.GetName.Rc = IDI_SYNC_REQ_GET_NAME;
  66                 (*(a->d.request)) ((ENTITY *) & sync_req);
  67                 strlcpy(features->name, sync_req.GetName.name,
  68                         sizeof(features->name));
  69
  70                 sync_req.GetSerial.Req = 0;
  71                 sync_req.GetSerial.Rc = IDI_SYNC_REQ_GET_SERIAL;
  72                 sync_req.GetSerial.serial = 0;
  73                 (*(a->d.request)) ((ENTITY *) & sync_req);
  74                 features->serial_number = sync_req.GetSerial.serial;
  75         }
  76
  77         return ((a) ? 0 : -1);
  78 }
  79
  80 /* --------------------------------------------------------------------------
  81                 REMOVE ADAPTER
  82    -------------------------------------------------------------------------- */
  83 void diva_user_mode_idi_remove_adapter(int adapter_nr)
  84 {
  85         struct list_head *tmp;
  86         diva_um_idi_adapter_t *a;
  87
  88         list_for_each(tmp, &adapter_q) {
  89                 a = list_entry(tmp, diva_um_idi_adapter_t, link);
  90                 if (a->adapter_nr == adapter_nr) {
  91                         list_del(tmp);
  92                         cleanup_adapter(a);
  93                         DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
  94                         diva_os_free(0, a);
  95                         break;
  96                 }
  97         }
  98 }
  99
 100 /* --------------------------------------------------------------------------
 101                 CALLED ON DRIVER EXIT (UNLOAD)
 102    -------------------------------------------------------------------------- */
 103 void diva_user_mode_idi_finit(void)
 104 {
 105         struct list_head *tmp, *safe;
 106         diva_um_idi_adapter_t *a;
 107
 108         list_for_each_safe(tmp, safe, &adapter_q) {
 109                 a = list_entry(tmp, diva_um_idi_adapter_t, link);
 110                 list_del(tmp);
 111                 cleanup_adapter(a);
 112                 DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
 113                 diva_os_free(0, a);
 114         }
 115         diva_os_destroy_spin_lock(&adapter_lock, "adapter");
 116 }
 117
 118 /* -------------------------------------------------------------------------
 119                 CREATE AND INIT IDI ADAPTER
 120          ------------------------------------------------------------------------- */
 121 int diva_user_mode_idi_create_adapter(const DESCRIPTOR * d, int adapter_nr)
 122 {
 123         diva_os_spin_lock_magic_t old_irql;
 124         diva_um_idi_adapter_t *a =
 125             (diva_um_idi_adapter_t *) diva_os_malloc(0,
 126                                                      sizeof
 127                                                      (diva_um_idi_adapter_t));
 128
 129         if (!a) {
 130                 return (-1);
 131         }
 132         memset(a, 0x00, sizeof(*a));
 133         INIT_LIST_HEAD(&a->entity_q);
 134
 135         a->d = *d;
 136         a->adapter_nr = adapter_nr;
 137
 138         DBG_LOG(("DIDD_ADD A(%d), type:%02x, features:%04x, channels:%d",
 139                  adapter_nr, a->d.type, a->d.features, a->d.channels));
 140
 141         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_adapter");
 142         list_add_tail(&a->link, &adapter_q);
 143         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_adapter");
 144         return (0);
 145 }
 146
 147 /* ------------------------------------------------------------------------
 148                         Find adapter by Adapter number
 149    ------------------------------------------------------------------------ */
 150 static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr)
 151 {
 152         diva_um_idi_adapter_t *a = NULL;
 153         struct list_head *tmp;
 154
 155         list_for_each(tmp, &adapter_q) {
 156                 a = list_entry(tmp, diva_um_idi_adapter_t, link);
 157                 DBG_TRC(("find_adapter: (%d)-(%d)", nr, a->adapter_nr));
 158                 if (a->adapter_nr == (int)nr)
 159                         break;
 160                 a = NULL;
 161         }
 162         return(a);
 163 }
 164
 165 /* ------------------------------------------------------------------------
 166                 Cleanup this adapter and cleanup/delete all entities assigned
 167                 to this adapter
 168    ------------------------------------------------------------------------ */
 169 static void cleanup_adapter(diva_um_idi_adapter_t * a)
 170 {
 171         struct list_head *tmp, *safe;
 172         divas_um_idi_entity_t *e;
 173
 174         list_for_each_safe(tmp, safe, &a->entity_q) {
 175                 e = list_entry(tmp, divas_um_idi_entity_t, link);
 176                 list_del(tmp);
 177                 cleanup_entity(e);
 178                 if (e->os_context) {
 179                         diva_os_wakeup_read(e->os_context);
 180                         diva_os_wakeup_close(e->os_context);
 181                 }
 182         }
 183         memset(&a->d, 0x00, sizeof(DESCRIPTOR));
 184 }
 185
 186 /* ------------------------------------------------------------------------
 187                 Cleanup, but NOT delete this entity
 188    ------------------------------------------------------------------------ */
 189 static void cleanup_entity(divas_um_idi_entity_t * e)
 190 {
 191         e->os_ref = NULL;
 192         e->status = 0;
 193         e->adapter = NULL;
 194         e->e.Id = 0;
 195         e->rc_count = 0;
 196
 197         e->status |= DIVA_UM_IDI_REMOVED;
 198         e->status |= DIVA_UM_IDI_REMOVE_PENDING;
 199
 200         diva_data_q_finit(&e->data);
 201         diva_data_q_finit(&e->rc);
 202 }
 203
 204
 205 /* ------------------------------------------------------------------------
 206                 Create ENTITY, link it to the adapter and remove pointer to entity
 207    ------------------------------------------------------------------------ */
 208 void *divas_um_idi_create_entity(dword adapter_nr, void *file)
 209 {
 210         divas_um_idi_entity_t *e;
 211         diva_um_idi_adapter_t *a;
 212         diva_os_spin_lock_magic_t old_irql;
 213
 214         if ((e = (divas_um_idi_entity_t *) diva_os_malloc(0, sizeof(*e)))) {
 215                 memset(e, 0x00, sizeof(*e));
 216                 if (!
 217                     (e->os_context =
 218                      diva_os_malloc(0, diva_os_get_context_size()))) {
 219                         DBG_LOG(("E(%08x) no memory for os context", e));
 220                         diva_os_free(0, e);
 221                         return NULL;
 222                 }
 223                 memset(e->os_context, 0x00, diva_os_get_context_size());
 224
 225                 if ((diva_data_q_init(&e->data, 2048 + 512, 16))) {
 226                         diva_os_free(0, e->os_context);
 227                         diva_os_free(0, e);
 228                         return NULL;
 229                 }
 230                 if ((diva_data_q_init(&e->rc, sizeof(diva_um_idi_ind_hdr_t), 2))) {
 231                         diva_data_q_finit(&e->data);
 232                         diva_os_free(0, e->os_context);
 233                         diva_os_free(0, e);
 234                         return NULL;
 235                 }
 236
 237                 diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_entity");
 238                 /*
 239                    Look for Adapter requested
 240                  */
 241                 if (!(a = diva_um_idi_find_adapter(adapter_nr))) {
 242                         /*
 243                            No adapter was found, or this adapter was removed
 244                          */
 245                         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");
 246
 247                         DBG_LOG(("A: no adapter(%ld)", adapter_nr));
 248
 249                         cleanup_entity(e);
 250                         diva_os_free(0, e->os_context);
 251                         diva_os_free(0, e);
 252
 253                         return NULL;
 254                 }
 255
 256                 e->os_ref = file;       /* link to os handle */
 257                 e->adapter = a; /* link to adapter   */
 258
 259                 list_add_tail(&e->link, &a->entity_q);  /* link from adapter */
 260
 261                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");
 262
 263                 DBG_LOG(("A(%ld), create E(%08x)", adapter_nr, e));
 264         }
 265
 266         return (e);
 267 }
 268
 269 /* ------------------------------------------------------------------------
 270                 Unlink entity and free memory
 271    ------------------------------------------------------------------------ */
 272 int divas_um_idi_delete_entity(int adapter_nr, void *entity)
 273 {
 274         divas_um_idi_entity_t *e;
 275         diva_um_idi_adapter_t *a;
 276         diva_os_spin_lock_magic_t old_irql;
 277
 278         if (!(e = (divas_um_idi_entity_t *) entity))
 279                 return (-1);
 280
 281         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "delete_entity");
 282         if ((a = e->adapter)) {
 283                 list_del(&e->link);
 284         }
 285         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "delete_entity");
 286
 287         diva_um_idi_stop_wdog(entity);
 288         cleanup_entity(e);
 289         diva_os_free(0, e->os_context);
 290         memset(e, 0x00, sizeof(*e));
 291         diva_os_free(0, e);
 292
 293         DBG_LOG(("A(%d) remove E:%08x", adapter_nr, e));
 294
 295         return (0);
 296 }
 297
 298 /* --------------------------------------------------------------------------
 299                 Called by application to read data from IDI
 300          -------------------------------------------------------------------------- */
 301 int diva_um_idi_read(void *entity,
 302                      void *os_handle,
 303                      void *dst,
 304                      int max_length, divas_um_idi_copy_to_user_fn_t cp_fn)
 305 {
 306         divas_um_idi_entity_t *e;
 307         diva_um_idi_adapter_t *a;
 308         const void *data;
 309         int length, ret = 0;
 310         diva_um_idi_data_queue_t *q;
 311         diva_os_spin_lock_magic_t old_irql;
 312
 313         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "read");
 314
 315         e = (divas_um_idi_entity_t *) entity;
 316         if (!e || (!(a = e->adapter)) ||
 317             (e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
 318             (e->status & DIVA_UM_IDI_REMOVED) ||
 319             (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
 320                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");
 321                 DBG_ERR(("E(%08x) read failed - adapter removed", e))
 322                 return (-1);
 323         }
 324
 325         DBG_TRC(("A(%d) E(%08x) read(%d)", a->adapter_nr, e, max_length));
 326
 327         /*
 328            Try to read return code first
 329          */
 330         data = diva_data_q_get_segment4read(&e->rc);
 331         q = &e->rc;
 332
 333         /*
 334            No return codes available, read indications now
 335          */
 336         if (!data) {
 337                 if (!(e->status & DIVA_UM_IDI_RC_PENDING)) {
 338                         DBG_TRC(("A(%d) E(%08x) read data", a->adapter_nr, e));
 339                         data = diva_data_q_get_segment4read(&e->data);
 340                         q = &e->data;
 341                 }
 342         } else {
 343                 e->status &= ~DIVA_UM_IDI_RC_PENDING;
 344                 DBG_TRC(("A(%d) E(%08x) read rc", a->adapter_nr, e));
 345         }
 346
 347         if (data) {
 348                 if ((length = diva_data_q_get_segment_length(q)) >
 349                     max_length) {
 350                         /*
 351                            Not enough space to read message
 352                          */
 353                         DBG_ERR(("A: A(%d) E(%08x) read small buffer",
 354                                  a->adapter_nr, e, ret));
 355                         diva_os_leave_spin_lock(&adapter_lock, &old_irql,
 356                                                 "read");
 357                         return (-2);
 358                 }
 359                 /*
 360                    Copy it to user, this function does access ONLY locked an verified
 361                    memory, also we can access it witch spin lock held
 362                  */
 363
 364                 if ((ret = (*cp_fn) (os_handle, dst, data, length)) >= 0) {
 365                         /*
 366                            Acknowledge only if read was successfull
 367                          */
 368                         diva_data_q_ack_segment4read(q);
 369                 }
 370         }
 371
 372
 373         DBG_TRC(("A(%d) E(%08x) read=%d", a->adapter_nr, e, ret));
 374
 375         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");
 376
 377         return (ret);
 378 }
 379
 380
 381 int diva_um_idi_write(void *entity,
 382                       void *os_handle,
 383                       const void *src,
 384                       int length, divas_um_idi_copy_from_user_fn_t cp_fn)
 385 {
 386         divas_um_idi_entity_t *e;
 387         diva_um_idi_adapter_t *a;
 388         diva_um_idi_req_hdr_t *req;
 389         void *data;
 390         int ret = 0;
 391         diva_os_spin_lock_magic_t old_irql;
 392
 393         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "write");
 394
 395         e = (divas_um_idi_entity_t *) entity;
 396         if (!e || (!(a = e->adapter)) ||
 397             (e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
 398             (e->status & DIVA_UM_IDI_REMOVED) ||
 399             (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
 400                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 401                 DBG_ERR(("E(%08x) write failed - adapter removed", e))
 402                 return (-1);
 403         }
 404
 405         DBG_TRC(("A(%d) E(%08x) write(%d)", a->adapter_nr, e, length));
 406
 407         if ((length < sizeof(*req)) || (length > sizeof(e->buffer))) {
 408                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 409                 return (-2);
 410         }
 411
 412         if (e->status & DIVA_UM_IDI_RC_PENDING) {
 413                 DBG_ERR(("A: A(%d) E(%08x) rc pending", a->adapter_nr, e));
 414                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 415                 return (-1);    /* should wait for RC code first */
 416         }
 417
 418         /*
 419            Copy function does access only locked verified memory,
 420            also it can be called with spin lock held
 421          */
 422         if ((ret = (*cp_fn) (os_handle, e->buffer, src, length)) < 0) {
 423                 DBG_TRC(("A: A(%d) E(%08x) write error=%d", a->adapter_nr,
 424                          e, ret));
 425                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 426                 return (ret);
 427         }
 428
 429         req = (diva_um_idi_req_hdr_t *) & e->buffer[0];
 430
 431         switch (req->type) {
 432         case DIVA_UM_IDI_GET_FEATURES:{
 433                         DBG_LOG(("A(%d) get_features", a->adapter_nr));
 434                         if (!(data =
 435                              diva_data_q_get_segment4write(&e->data))) {
 436                                 DBG_ERR(("A(%d) get_features, no free buffer",
 437                                          a->adapter_nr));
 438                                 diva_os_leave_spin_lock(&adapter_lock,
 439                                                         &old_irql,
 440                                                         "write");
 441                                 return (0);
 442                         }
 443                         diva_user_mode_idi_adapter_features(a, &(((diva_um_idi_ind_hdr_t
 444                                                                 *) data)->hdr.features));
 445                         ((diva_um_idi_ind_hdr_t *) data)->type =
 446                             DIVA_UM_IDI_IND_FEATURES;
 447                         ((diva_um_idi_ind_hdr_t *) data)->data_length = 0;
 448                         diva_data_q_ack_segment4write(&e->data,
 449                                                       sizeof(diva_um_idi_ind_hdr_t));
 450
 451                         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 452
 453                         diva_os_wakeup_read(e->os_context);
 454                 }
 455                 break;
 456
 457         case DIVA_UM_IDI_REQ:
 458         case DIVA_UM_IDI_REQ_MAN:
 459         case DIVA_UM_IDI_REQ_SIG:
 460         case DIVA_UM_IDI_REQ_NET:
 461                 DBG_TRC(("A(%d) REQ(%02d)-(%02d)-(%08x)", a->adapter_nr,
 462                          req->Req, req->ReqCh,
 463                          req->type & DIVA_UM_IDI_REQ_TYPE_MASK));
 464                 switch (process_idi_request(e, req)) {
 465                 case -1:
 466                         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 467                         return (-1);
 468                 case -2:
 469                         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 470                         diva_os_wakeup_read(e->os_context);
 471                         break;
 472                 default:
 473                         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 474                         break;
 475                 }
 476                 break;
 477
 478         default:
 479                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
 480                 return (-1);
 481         }
 482
 483         DBG_TRC(("A(%d) E(%08x) write=%d", a->adapter_nr, e, ret));
 484
 485         return (ret);
 486 }
 487
 488 /* --------------------------------------------------------------------------
 489                         CALLBACK FROM XDI
 490          -------------------------------------------------------------------------- */
 491 static void diva_um_idi_xdi_callback(ENTITY * entity)
 492 {
 493         divas_um_idi_entity_t *e = DIVAS_CONTAINING_RECORD(entity,
 494                                                            divas_um_idi_entity_t,
 495                                                            e);
 496         diva_os_spin_lock_magic_t old_irql;
 497         int call_wakeup = 0;
 498
 499         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
 500
 501         if (e->e.complete == 255) {
 502                 if (!(e->status & DIVA_UM_IDI_REMOVE_PENDING)) {
 503                         diva_um_idi_stop_wdog(e);
 504                 }
 505                 if ((call_wakeup = process_idi_rc(e, e->e.Rc))) {
 506                         if (e->rc_count) {
 507                                 e->rc_count--;
 508                         }
 509                 }
 510                 e->e.Rc = 0;
 511                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
 512
 513                 if (call_wakeup) {
 514                         diva_os_wakeup_read(e->os_context);
 515                         diva_os_wakeup_close(e->os_context);
 516                 }
 517         } else {
 518                 if (e->status & DIVA_UM_IDI_REMOVE_PENDING) {
 519                         e->e.RNum = 0;
 520                         e->e.RNR = 2;
 521                 } else {
 522                         call_wakeup = process_idi_ind(e, e->e.Ind);
 523                 }
 524                 e->e.Ind = 0;
 525                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
 526                 if (call_wakeup) {
 527                         diva_os_wakeup_read(e->os_context);
 528                 }
 529         }
 530 }
 531
 532 static int process_idi_request(divas_um_idi_entity_t * e,
 533                                const diva_um_idi_req_hdr_t * req)
 534 {
 535         int assign = 0;
 536         byte Req = (byte) req->Req;
 537         dword type = req->type & DIVA_UM_IDI_REQ_TYPE_MASK;
 538
 539         if (!e->e.Id || !e->e.callback) {       /* not assigned */
 540                 if (Req != ASSIGN) {
 541                         DBG_ERR(("A: A(%d) E(%08x) not assigned",
 542                                  e->adapter->adapter_nr, e));
 543                         return (-1);    /* NOT ASSIGNED */
 544                 } else {
 545                         switch (type) {
 546                         case DIVA_UM_IDI_REQ_TYPE_MAN:
 547                                 e->e.Id = MAN_ID;
 548                                 DBG_TRC(("A(%d) E(%08x) assign MAN",
 549                                          e->adapter->adapter_nr, e));
 550                                 break;
 551
 552                         case DIVA_UM_IDI_REQ_TYPE_SIG:
 553                                 e->e.Id = DSIG_ID;
 554                                 DBG_TRC(("A(%d) E(%08x) assign SIG",
 555                                          e->adapter->adapter_nr, e));
 556                                 break;
 557
 558                         case DIVA_UM_IDI_REQ_TYPE_NET:
 559                                 e->e.Id = NL_ID;
 560                                 DBG_TRC(("A(%d) E(%08x) assign NET",
 561                                          e->adapter->adapter_nr, e));
 562                                 break;
 563
 564                         default:
 565                                 DBG_ERR(("A: A(%d) E(%08x) unknown type=%08x",
 566                                          e->adapter->adapter_nr, e,
 567                                          type));
 568                                 return (-1);
 569                         }
 570                 }
 571                 e->e.XNum = 1;
 572                 e->e.RNum = 1;
 573                 e->e.callback = diva_um_idi_xdi_callback;
 574                 e->e.X = &e->XData;
 575                 e->e.R = &e->RData;
 576                 assign = 1;
 577         }
 578         e->status |= DIVA_UM_IDI_RC_PENDING;
 579         e->e.Req = Req;
 580         e->e.ReqCh = (byte) req->ReqCh;
 581         e->e.X->PLength = (word) req->data_length;
 582         e->e.X->P = (byte *) & req[1];  /* Our buffer is safe */
 583
 584         DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
 585                  e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
 586                  e->e.ReqCh, e->e.X->PLength));
 587
 588         e->rc_count++;
 589
 590         if (e->adapter && e->adapter->d.request) {
 591                 diva_um_idi_start_wdog(e);
 592                 (*(e->adapter->d.request)) (&e->e);
 593         }
 594
 595         if (assign) {
 596                 if (e->e.Rc == OUT_OF_RESOURCES) {
 597                         /*
 598                            XDI has no entities more, call was not forwarded to the card,
 599                            no callback will be scheduled
 600                          */
 601                         DBG_ERR(("A: A(%d) E(%08x) XDI out of entities",
 602                                  e->adapter->adapter_nr, e));
 603
 604                         e->e.Id = 0;
 605                         e->e.ReqCh = 0;
 606                         e->e.RcCh = 0;
 607                         e->e.Ind = 0;
 608                         e->e.IndCh = 0;
 609                         e->e.XNum = 0;
 610                         e->e.RNum = 0;
 611                         e->e.callback = NULL;
 612                         e->e.X = NULL;
 613                         e->e.R = NULL;
 614                         write_return_code(e, ASSIGN_RC | OUT_OF_RESOURCES);
 615                         return (-2);
 616                 } else {
 617                         e->status |= DIVA_UM_IDI_ASSIGN_PENDING;
 618                 }
 619         }
 620
 621         return (0);
 622 }
 623
 624 static int process_idi_rc(divas_um_idi_entity_t * e, byte rc)
 625 {
 626         DBG_TRC(("A(%d) E(%08x) rc(%02x-%02x-%02x)",
 627                  e->adapter->adapter_nr, e, e->e.Id, rc, e->e.RcCh));
 628
 629         if (e->status & DIVA_UM_IDI_ASSIGN_PENDING) {
 630                 e->status &= ~DIVA_UM_IDI_ASSIGN_PENDING;
 631                 if (rc != ASSIGN_OK) {
 632                         DBG_ERR(("A: A(%d) E(%08x) ASSIGN failed",
 633                                  e->adapter->adapter_nr, e));
 634                         e->e.callback = NULL;
 635                         e->e.Id = 0;
 636                         e->e.Req = 0;
 637                         e->e.ReqCh = 0;
 638                         e->e.Rc = 0;
 639                         e->e.RcCh = 0;
 640                         e->e.Ind = 0;
 641                         e->e.IndCh = 0;
 642                         e->e.X = NULL;
 643                         e->e.R = NULL;
 644                         e->e.XNum = 0;
 645                         e->e.RNum = 0;
 646                 }
 647         }
 648         if ((e->e.Req == REMOVE) && e->e.Id && (rc == 0xff)) {
 649                 DBG_ERR(("A: A(%d) E(%08x)  discard OK in REMOVE",
 650                          e->adapter->adapter_nr, e));
 651                 return (0);     /* let us do it in the driver */
 652         }
 653         if ((e->e.Req == REMOVE) && (!e->e.Id)) {       /* REMOVE COMPLETE */
 654                 e->e.callback = NULL;
 655                 e->e.Id = 0;
 656                 e->e.Req = 0;
 657                 e->e.ReqCh = 0;
 658                 e->e.Rc = 0;
 659                 e->e.RcCh = 0;
 660                 e->e.Ind = 0;
 661                 e->e.IndCh = 0;
 662                 e->e.X = NULL;
 663                 e->e.R = NULL;
 664                 e->e.XNum = 0;
 665                 e->e.RNum = 0;
 666                 e->rc_count = 0;
 667         }
 668         if ((e->e.Req == REMOVE) && (rc != 0xff)) {     /* REMOVE FAILED */
 669                 DBG_ERR(("A: A(%d) E(%08x)  REMOVE FAILED",
 670                          e->adapter->adapter_nr, e));
 671         }
 672         write_return_code(e, rc);
 673
 674         return (1);
 675 }
 676
 677 static int process_idi_ind(divas_um_idi_entity_t * e, byte ind)
 678 {
 679         int do_wakeup = 0;
 680
 681         if (e->e.complete != 0x02) {
 682                 diva_um_idi_ind_hdr_t *pind =
 683                     (diva_um_idi_ind_hdr_t *)
 684                     diva_data_q_get_segment4write(&e->data);
 685                 if (pind) {
 686                         e->e.RNum = 1;
 687                         e->e.R->P = (byte *) & pind[1];
 688                         e->e.R->PLength =
 689                             (word) (diva_data_q_get_max_length(&e->data) -
 690                                     sizeof(*pind));
 691                         DBG_TRC(("A(%d) E(%08x) ind_1(%02x-%02x-%02x)-[%d-%d]",
 692                                  e->adapter->adapter_nr, e, e->e.Id, ind,
 693                                  e->e.IndCh, e->e.RLength,
 694                                  e->e.R->PLength));
 695
 696                 } else {
 697                         DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-RNR",
 698                                  e->adapter->adapter_nr, e, e->e.Id, ind,
 699                                  e->e.IndCh));
 700                         e->e.RNum = 0;
 701                         e->e.RNR = 1;
 702                         do_wakeup = 1;
 703                 }
 704         } else {
 705                 diva_um_idi_ind_hdr_t *pind =
 706                     (diva_um_idi_ind_hdr_t *) (e->e.R->P);
 707
 708                 DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-[%d]",
 709                          e->adapter->adapter_nr, e, e->e.Id, ind,
 710                          e->e.IndCh, e->e.R->PLength));
 711
 712                 pind--;
 713                 pind->type = DIVA_UM_IDI_IND;
 714                 pind->hdr.ind.Ind = ind;
 715                 pind->hdr.ind.IndCh = e->e.IndCh;
 716                 pind->data_length = e->e.R->PLength;
 717                 diva_data_q_ack_segment4write(&e->data,
 718                                               (int) (sizeof(*pind) +
 719                                                      e->e.R->PLength));
 720                 do_wakeup = 1;
 721         }
 722
 723         if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
 724                 do_wakeup = 0;
 725         }
 726
 727         return (do_wakeup);
 728 }
 729
 730 /* --------------------------------------------------------------------------
 731                 Write return code to the return code queue of entity
 732          -------------------------------------------------------------------------- */
 733 static int write_return_code(divas_um_idi_entity_t * e, byte rc)
 734 {
 735         diva_um_idi_ind_hdr_t *prc;
 736
 737         if (!(prc =
 738              (diva_um_idi_ind_hdr_t *) diva_data_q_get_segment4write(&e->rc)))
 739         {
 740                 DBG_ERR(("A: A(%d) E(%08x) rc(%02x) lost",
 741                          e->adapter->adapter_nr, e, rc));
 742                 e->status &= ~DIVA_UM_IDI_RC_PENDING;
 743                 return (-1);
 744         }
 745
 746         prc->type = DIVA_UM_IDI_IND_RC;
 747         prc->hdr.rc.Rc = rc;
 748         prc->hdr.rc.RcCh = e->e.RcCh;
 749         prc->data_length = 0;
 750         diva_data_q_ack_segment4write(&e->rc, sizeof(*prc));
 751
 752         return (0);
 753 }
 754
 755 /* --------------------------------------------------------------------------
 756                 Return amount of entries that can be bead from this entity or
 757                 -1 if adapter was removed
 758          -------------------------------------------------------------------------- */
 759 int diva_user_mode_idi_ind_ready(void *entity, void *os_handle)
 760 {
 761         divas_um_idi_entity_t *e;
 762         diva_um_idi_adapter_t *a;
 763         diva_os_spin_lock_magic_t old_irql;
 764         int ret;
 765
 766         if (!entity)
 767                 return (-1);
 768         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "ind_ready");
 769         e = (divas_um_idi_entity_t *) entity;
 770         a = e->adapter;
 771
 772         if ((!a) || (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
 773                 /*
 774                    Adapter was unloaded
 775                  */
 776                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
 777                 return (-1);    /* adapter was removed */
 778         }
 779         if (e->status & DIVA_UM_IDI_REMOVED) {
 780                 /*
 781                    entity was removed as result of adapter removal
 782                    user should assign this entity again
 783                  */
 784                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
 785                 return (-1);
 786         }
 787
 788         ret = e->rc.count + e->data.count;
 789
 790         if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
 791                 ret = 0;
 792         }
 793
 794         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
 795
 796         return (ret);
 797 }
 798
 799 void *diva_um_id_get_os_context(void *entity)
 800 {
 801         return (((divas_um_idi_entity_t *) entity)->os_context);
 802 }
 803
 804 int divas_um_idi_entity_assigned(void *entity)
 805 {
 806         divas_um_idi_entity_t *e;
 807         diva_um_idi_adapter_t *a;
 808         int ret;
 809         diva_os_spin_lock_magic_t old_irql;
 810
 811         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "assigned?");
 812
 813
 814         e = (divas_um_idi_entity_t *) entity;
 815         if (!e || (!(a = e->adapter)) ||
 816             (e->status & DIVA_UM_IDI_REMOVED) ||
 817             (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
 818                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");
 819                 return (0);
 820         }
 821
 822         e->status |= DIVA_UM_IDI_REMOVE_PENDING;
 823
 824         ret = (e->e.Id || e->rc_count
 825                || (e->status & DIVA_UM_IDI_ASSIGN_PENDING));
 826
 827         DBG_TRC(("Id:%02x, rc_count:%d, status:%08x", e->e.Id, e->rc_count,
 828                  e->status))
 829
 830         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");
 831
 832         return (ret);
 833 }
 834
 835 int divas_um_idi_entity_start_remove(void *entity)
 836 {
 837         divas_um_idi_entity_t *e;
 838         diva_um_idi_adapter_t *a;
 839         diva_os_spin_lock_magic_t old_irql;
 840
 841         diva_os_enter_spin_lock(&adapter_lock, &old_irql, "start_remove");
 842
 843         e = (divas_um_idi_entity_t *) entity;
 844         if (!e || (!(a = e->adapter)) ||
 845             (e->status & DIVA_UM_IDI_REMOVED) ||
 846             (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
 847                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
 848                 return (0);
 849         }
 850
 851         if (e->rc_count) {
 852                 /*
 853                    Entity BUSY
 854                  */
 855                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
 856                 return (1);
 857         }
 858
 859         if (!e->e.Id) {
 860                 /*
 861                    Remove request was already pending, and arrived now
 862                  */
 863                 diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
 864                 return (0);     /* REMOVE was pending */
 865         }
 866
 867         /*
 868            Now send remove request
 869          */
 870         e->e.Req = REMOVE;
 871         e->e.ReqCh = 0;
 872
 873         e->rc_count++;
 874
 875         DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
 876                  e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
 877                  e->e.ReqCh, e->e.X->PLength));
 878
 879         if (a->d.request)
 880                 (*(a->d.request)) (&e->e);
 881
 882         diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
 883
 884         return (0);
 885 }