linux/drivers/isdn/hardware/eicon/um_idi.c
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   1/* $Id: um_idi.c,v 1.14 2004/03/21 17:54:37 armin 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   -------------------------------------------------------------------------- */
  19extern void diva_os_wakeup_read(void *os_context);
  20extern void diva_os_wakeup_close(void *os_context);
  21/* --------------------------------------------------------------------------
  22                LOCALS
  23   -------------------------------------------------------------------------- */
  24static LIST_HEAD(adapter_q);
  25static diva_os_spin_lock_t adapter_lock;
  26
  27static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr);
  28static void cleanup_adapter(diva_um_idi_adapter_t * a);
  29static void cleanup_entity(divas_um_idi_entity_t * e);
  30static int diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t * a,
  31                                               diva_um_idi_adapter_features_t
  32                                               * features);
  33static int process_idi_request(divas_um_idi_entity_t * e,
  34                               const diva_um_idi_req_hdr_t * req);
  35static int process_idi_rc(divas_um_idi_entity_t * e, byte rc);
  36static int process_idi_ind(divas_um_idi_entity_t * e, byte ind);
  37static int write_return_code(divas_um_idi_entity_t * e, byte rc);
  38
  39/* --------------------------------------------------------------------------
  40                MAIN
  41   -------------------------------------------------------------------------- */
  42int 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   -------------------------------------------------------------------------- */
  51static int
  52diva_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   -------------------------------------------------------------------------- */
  83void 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   -------------------------------------------------------------------------- */
 103void 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         ------------------------------------------------------------------------- */
 121int 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   ------------------------------------------------------------------------ */
 150static 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   ------------------------------------------------------------------------ */
 169static 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   ------------------------------------------------------------------------ */
 189static 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   ------------------------------------------------------------------------ */
 208void *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   ------------------------------------------------------------------------ */
 272int 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         -------------------------------------------------------------------------- */
 301int 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
 381int 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         -------------------------------------------------------------------------- */
 491static 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
 532static 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
 624static 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
 677static 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         -------------------------------------------------------------------------- */
 733static 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         -------------------------------------------------------------------------- */
 759int 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
 799void *diva_um_id_get_os_context(void *entity)
 800{
 801        return (((divas_um_idi_entity_t *) entity)->os_context);
 802}
 803
 804int 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
 835int 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}
 886
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