aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/isdn/hardware/eicon/um_idi.c
blob: 6563db998d061388afea1eda81f68af3fcd43838 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
/* $Id: um_idi.c,v 1.14 2004/03/21 17:54:37 armin Exp $ */

#include "platform.h"
#include "di_defs.h"
#include "pc.h"
#include "dqueue.h"
#include "adapter.h"
#include "entity.h"
#include "um_xdi.h"
#include "um_idi.h"
#include "debuglib.h"
#include "divasync.h"

#define DIVAS_MAX_XDI_ADAPTERS	64

/* --------------------------------------------------------------------------
		IMPORTS
   -------------------------------------------------------------------------- */
extern void diva_os_wakeup_read(void *os_context);
extern void diva_os_wakeup_close(void *os_context);
/* --------------------------------------------------------------------------
		LOCALS
   -------------------------------------------------------------------------- */
static LIST_HEAD(adapter_q);
static diva_os_spin_lock_t adapter_lock;

static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr);
static void cleanup_adapter(diva_um_idi_adapter_t * a);
static void cleanup_entity(divas_um_idi_entity_t * e);
static int diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t * a,
					       diva_um_idi_adapter_features_t
					       * features);
static int process_idi_request(divas_um_idi_entity_t * e,
			       const diva_um_idi_req_hdr_t * req);
static int process_idi_rc(divas_um_idi_entity_t * e, byte rc);
static int process_idi_ind(divas_um_idi_entity_t * e, byte ind);
static int write_return_code(divas_um_idi_entity_t * e, byte rc);

/* --------------------------------------------------------------------------
		MAIN
   -------------------------------------------------------------------------- */
int diva_user_mode_idi_init(void)
{
	diva_os_initialize_spin_lock(&adapter_lock, "adapter");
	return (0);
}

/* --------------------------------------------------------------------------
		Copy adapter features to user supplied buffer
   -------------------------------------------------------------------------- */
static int
diva_user_mode_idi_adapter_features(diva_um_idi_adapter_t * a,
				    diva_um_idi_adapter_features_t *
				    features)
{
	IDI_SYNC_REQ sync_req;

	if ((a) && (a->d.request)) {
		features->type = a->d.type;
		features->features = a->d.features;
		features->channels = a->d.channels;
		memset(features->name, 0, sizeof(features->name));

		sync_req.GetName.Req = 0;
		sync_req.GetName.Rc = IDI_SYNC_REQ_GET_NAME;
		(*(a->d.request)) ((ENTITY *) & sync_req);
		strlcpy(features->name, sync_req.GetName.name,
			sizeof(features->name));

		sync_req.GetSerial.Req = 0;
		sync_req.GetSerial.Rc = IDI_SYNC_REQ_GET_SERIAL;
		sync_req.GetSerial.serial = 0;
		(*(a->d.request)) ((ENTITY *) & sync_req);
		features->serial_number = sync_req.GetSerial.serial;
	}

	return ((a) ? 0 : -1);
}

/* --------------------------------------------------------------------------
		REMOVE ADAPTER
   -------------------------------------------------------------------------- */
void diva_user_mode_idi_remove_adapter(int adapter_nr)
{
	struct list_head *tmp;
	diva_um_idi_adapter_t *a;

	list_for_each(tmp, &adapter_q) {
		a = list_entry(tmp, diva_um_idi_adapter_t, link);
		if (a->adapter_nr == adapter_nr) {
			list_del(tmp);
			cleanup_adapter(a);
			DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
			diva_os_free(0, a);
			break;
		}
	}
}

/* --------------------------------------------------------------------------
		CALLED ON DRIVER EXIT (UNLOAD)
   -------------------------------------------------------------------------- */
void diva_user_mode_idi_finit(void)
{
	struct list_head *tmp, *safe;
	diva_um_idi_adapter_t *a;

	list_for_each_safe(tmp, safe, &adapter_q) {
		a = list_entry(tmp, diva_um_idi_adapter_t, link);
		list_del(tmp);
		cleanup_adapter(a);
		DBG_LOG(("DIDD: del adapter(%d)", a->adapter_nr));
		diva_os_free(0, a);
	}
	diva_os_destroy_spin_lock(&adapter_lock, "adapter");
}

/* -------------------------------------------------------------------------
		CREATE AND INIT IDI ADAPTER
	 ------------------------------------------------------------------------- */
int diva_user_mode_idi_create_adapter(const DESCRIPTOR * d, int adapter_nr)
{
	diva_os_spin_lock_magic_t old_irql;
	diva_um_idi_adapter_t *a =
	    (diva_um_idi_adapter_t *) diva_os_malloc(0,
						     sizeof
						     (diva_um_idi_adapter_t));

	if (!a) {
		return (-1);
	}
	memset(a, 0x00, sizeof(*a));
	INIT_LIST_HEAD(&a->entity_q);

	a->d = *d;
	a->adapter_nr = adapter_nr;

	DBG_LOG(("DIDD_ADD A(%d), type:%02x, features:%04x, channels:%d",
		 adapter_nr, a->d.type, a->d.features, a->d.channels));

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_adapter");
	list_add_tail(&a->link, &adapter_q);
	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_adapter");
	return (0);
}

/* ------------------------------------------------------------------------
			Find adapter by Adapter number
   ------------------------------------------------------------------------ */
static diva_um_idi_adapter_t *diva_um_idi_find_adapter(dword nr)
{
	diva_um_idi_adapter_t *a = NULL;
	struct list_head *tmp;

	list_for_each(tmp, &adapter_q) {
		a = list_entry(tmp, diva_um_idi_adapter_t, link);
		DBG_TRC(("find_adapter: (%d)-(%d)", nr, a->adapter_nr));
		if (a->adapter_nr == (int)nr)
			break;
		a = NULL;
	}
	return(a);
}

/* ------------------------------------------------------------------------
		Cleanup this adapter and cleanup/delete all entities assigned
		to this adapter
   ------------------------------------------------------------------------ */
static void cleanup_adapter(diva_um_idi_adapter_t * a)
{
	struct list_head *tmp, *safe;
	divas_um_idi_entity_t *e;

	list_for_each_safe(tmp, safe, &a->entity_q) {
		e = list_entry(tmp, divas_um_idi_entity_t, link);
		list_del(tmp);
		cleanup_entity(e);
		if (e->os_context) {
			diva_os_wakeup_read(e->os_context);
			diva_os_wakeup_close(e->os_context);
		}
	}
	memset(&a->d, 0x00, sizeof(DESCRIPTOR));
}

/* ------------------------------------------------------------------------
		Cleanup, but NOT delete this entity
   ------------------------------------------------------------------------ */
static void cleanup_entity(divas_um_idi_entity_t * e)
{
	e->os_ref = NULL;
	e->status = 0;
	e->adapter = NULL;
	e->e.Id = 0;
	e->rc_count = 0;

	e->status |= DIVA_UM_IDI_REMOVED;
	e->status |= DIVA_UM_IDI_REMOVE_PENDING;

	diva_data_q_finit(&e->data);
	diva_data_q_finit(&e->rc);
}


/* ------------------------------------------------------------------------
		Create ENTITY, link it to the adapter and remove pointer to entity
   ------------------------------------------------------------------------ */
void *divas_um_idi_create_entity(dword adapter_nr, void *file)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	diva_os_spin_lock_magic_t old_irql;

	if ((e = (divas_um_idi_entity_t *) diva_os_malloc(0, sizeof(*e)))) {
		memset(e, 0x00, sizeof(*e));
		if (!
		    (e->os_context =
		     diva_os_malloc(0, diva_os_get_context_size()))) {
			DBG_LOG(("E(%08x) no memory for os context", e));
			diva_os_free(0, e);
			return NULL;
		}
		memset(e->os_context, 0x00, diva_os_get_context_size());

		if ((diva_data_q_init(&e->data, 2048 + 512, 16))) {
			diva_os_free(0, e->os_context);
			diva_os_free(0, e);
			return NULL;
		}
		if ((diva_data_q_init(&e->rc, sizeof(diva_um_idi_ind_hdr_t), 2))) {
			diva_data_q_finit(&e->data);
			diva_os_free(0, e->os_context);
			diva_os_free(0, e);
			return NULL;
		}

		diva_os_enter_spin_lock(&adapter_lock, &old_irql, "create_entity");
		/*
		   Look for Adapter requested
		 */
		if (!(a = diva_um_idi_find_adapter(adapter_nr))) {
			/*
			   No adapter was found, or this adapter was removed
			 */
			diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");

			DBG_LOG(("A: no adapter(%ld)", adapter_nr));

			cleanup_entity(e);
			diva_os_free(0, e->os_context);
			diva_os_free(0, e);

			return NULL;
		}

		e->os_ref = file;	/* link to os handle */
		e->adapter = a;	/* link to adapter   */

		list_add_tail(&e->link, &a->entity_q);	/* link from adapter */

		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "create_entity");

		DBG_LOG(("A(%ld), create E(%08x)", adapter_nr, e));
	}

	return (e);
}

/* ------------------------------------------------------------------------
		Unlink entity and free memory 
   ------------------------------------------------------------------------ */
int divas_um_idi_delete_entity(int adapter_nr, void *entity)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	diva_os_spin_lock_magic_t old_irql;

	if (!(e = (divas_um_idi_entity_t *) entity))
		return (-1);

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "delete_entity");
	if ((a = e->adapter)) {
		list_del(&e->link);
	}
	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "delete_entity");

	diva_um_idi_stop_wdog(entity);
	cleanup_entity(e);
	diva_os_free(0, e->os_context);
	memset(e, 0x00, sizeof(*e));
	diva_os_free(0, e);

	DBG_LOG(("A(%d) remove E:%08x", adapter_nr, e));

	return (0);
}

/* --------------------------------------------------------------------------
		Called by application to read data from IDI
	 -------------------------------------------------------------------------- */
int diva_um_idi_read(void *entity,
		     void *os_handle,
		     void *dst,
		     int max_length, divas_um_idi_copy_to_user_fn_t cp_fn)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	const void *data;
	int length, ret = 0;
	diva_um_idi_data_queue_t *q;
	diva_os_spin_lock_magic_t old_irql;

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "read");

	e = (divas_um_idi_entity_t *) entity;
	if (!e || (!(a = e->adapter)) ||
	    (e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
	    (e->status & DIVA_UM_IDI_REMOVED) ||
	    (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");
		DBG_ERR(("E(%08x) read failed - adapter removed", e))
		return (-1);
	}

	DBG_TRC(("A(%d) E(%08x) read(%d)", a->adapter_nr, e, max_length));

	/*
	   Try to read return code first
	 */
	data = diva_data_q_get_segment4read(&e->rc);
	q = &e->rc;

	/*
	   No return codes available, read indications now
	 */
	if (!data) {
		if (!(e->status & DIVA_UM_IDI_RC_PENDING)) {
			DBG_TRC(("A(%d) E(%08x) read data", a->adapter_nr, e));
			data = diva_data_q_get_segment4read(&e->data);
			q = &e->data;
		}
	} else {
		e->status &= ~DIVA_UM_IDI_RC_PENDING;
		DBG_TRC(("A(%d) E(%08x) read rc", a->adapter_nr, e));
	}

	if (data) {
		if ((length = diva_data_q_get_segment_length(q)) >
		    max_length) {
			/*
			   Not enough space to read message
			 */
			DBG_ERR(("A: A(%d) E(%08x) read small buffer",
				 a->adapter_nr, e, ret));
			diva_os_leave_spin_lock(&adapter_lock, &old_irql,
						"read");
			return (-2);
		}
		/*
		   Copy it to user, this function does access ONLY locked an verified
		   memory, also we can access it witch spin lock held
		 */

		if ((ret = (*cp_fn) (os_handle, dst, data, length)) >= 0) {
			/*
			   Acknowledge only if read was successfull
			 */
			diva_data_q_ack_segment4read(q);
		}
	}


	DBG_TRC(("A(%d) E(%08x) read=%d", a->adapter_nr, e, ret));

	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "read");

	return (ret);
}


int diva_um_idi_write(void *entity,
		      void *os_handle,
		      const void *src,
		      int length, divas_um_idi_copy_from_user_fn_t cp_fn)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	diva_um_idi_req_hdr_t *req;
	void *data;
	int ret = 0;
	diva_os_spin_lock_magic_t old_irql;

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "write");

	e = (divas_um_idi_entity_t *) entity;
	if (!e || (!(a = e->adapter)) ||
	    (e->status & DIVA_UM_IDI_REMOVE_PENDING) ||
	    (e->status & DIVA_UM_IDI_REMOVED) ||
	    (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
		DBG_ERR(("E(%08x) write failed - adapter removed", e))
		return (-1);
	}

	DBG_TRC(("A(%d) E(%08x) write(%d)", a->adapter_nr, e, length));

	if ((length < sizeof(*req)) || (length > sizeof(e->buffer))) {
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
		return (-2);
	}

	if (e->status & DIVA_UM_IDI_RC_PENDING) {
		DBG_ERR(("A: A(%d) E(%08x) rc pending", a->adapter_nr, e));
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
		return (-1);	/* should wait for RC code first */
	}

	/*
	   Copy function does access only locked verified memory,
	   also it can be called with spin lock held
	 */
	if ((ret = (*cp_fn) (os_handle, e->buffer, src, length)) < 0) {
		DBG_TRC(("A: A(%d) E(%08x) write error=%d", a->adapter_nr,
			 e, ret));
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
		return (ret);
	}

	req = (diva_um_idi_req_hdr_t *) & e->buffer[0];

	switch (req->type) {
	case DIVA_UM_IDI_GET_FEATURES:{
			DBG_LOG(("A(%d) get_features", a->adapter_nr));
			if (!(data =
			     diva_data_q_get_segment4write(&e->data))) {
				DBG_ERR(("A(%d) get_features, no free buffer",
					 a->adapter_nr));
				diva_os_leave_spin_lock(&adapter_lock,
							&old_irql,
							"write");
				return (0);
			}
			diva_user_mode_idi_adapter_features(a, &(((diva_um_idi_ind_hdr_t
								*) data)->hdr.features));
			((diva_um_idi_ind_hdr_t *) data)->type =
			    DIVA_UM_IDI_IND_FEATURES;
			((diva_um_idi_ind_hdr_t *) data)->data_length = 0;
			diva_data_q_ack_segment4write(&e->data,
						      sizeof(diva_um_idi_ind_hdr_t));

			diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");

			diva_os_wakeup_read(e->os_context);
		}
		break;

	case DIVA_UM_IDI_REQ:
	case DIVA_UM_IDI_REQ_MAN:
	case DIVA_UM_IDI_REQ_SIG:
	case DIVA_UM_IDI_REQ_NET:
		DBG_TRC(("A(%d) REQ(%02d)-(%02d)-(%08x)", a->adapter_nr,
			 req->Req, req->ReqCh,
			 req->type & DIVA_UM_IDI_REQ_TYPE_MASK));
		switch (process_idi_request(e, req)) {
		case -1:
			diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
			return (-1);
		case -2:
			diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
			diva_os_wakeup_read(e->os_context);
			break;
		default:
			diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
			break;
		}
		break;

	default:
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "write");
		return (-1);
	}

	DBG_TRC(("A(%d) E(%08x) write=%d", a->adapter_nr, e, ret));

	return (ret);
}

/* --------------------------------------------------------------------------
			CALLBACK FROM XDI
	 -------------------------------------------------------------------------- */
static void diva_um_idi_xdi_callback(ENTITY * entity)
{
	divas_um_idi_entity_t *e = DIVAS_CONTAINING_RECORD(entity,
							   divas_um_idi_entity_t,
							   e);
	diva_os_spin_lock_magic_t old_irql;
	int call_wakeup = 0;

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "xdi_callback");

	if (e->e.complete == 255) {
		if (!(e->status & DIVA_UM_IDI_REMOVE_PENDING)) {
			diva_um_idi_stop_wdog(e);
		}
		if ((call_wakeup = process_idi_rc(e, e->e.Rc))) {
			if (e->rc_count) {
				e->rc_count--;
			}
		}
		e->e.Rc = 0;
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");

		if (call_wakeup) {
			diva_os_wakeup_read(e->os_context);
			diva_os_wakeup_close(e->os_context);
		}
	} else {
		if (e->status & DIVA_UM_IDI_REMOVE_PENDING) {
			e->e.RNum = 0;
			e->e.RNR = 2;
		} else {
			call_wakeup = process_idi_ind(e, e->e.Ind);
		}
		e->e.Ind = 0;
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "xdi_callback");
		if (call_wakeup) {
			diva_os_wakeup_read(e->os_context);
		}
	}
}

static int process_idi_request(divas_um_idi_entity_t * e,
			       const diva_um_idi_req_hdr_t * req)
{
	int assign = 0;
	byte Req = (byte) req->Req;
	dword type = req->type & DIVA_UM_IDI_REQ_TYPE_MASK;

	if (!e->e.Id || !e->e.callback) {	/* not assigned */
		if (Req != ASSIGN) {
			DBG_ERR(("A: A(%d) E(%08x) not assigned",
				 e->adapter->adapter_nr, e));
			return (-1);	/* NOT ASSIGNED */
		} else {
			switch (type) {
			case DIVA_UM_IDI_REQ_TYPE_MAN:
				e->e.Id = MAN_ID;
				DBG_TRC(("A(%d) E(%08x) assign MAN",
					 e->adapter->adapter_nr, e));
				break;

			case DIVA_UM_IDI_REQ_TYPE_SIG:
				e->e.Id = DSIG_ID;
				DBG_TRC(("A(%d) E(%08x) assign SIG",
					 e->adapter->adapter_nr, e));
				break;

			case DIVA_UM_IDI_REQ_TYPE_NET:
				e->e.Id = NL_ID;
				DBG_TRC(("A(%d) E(%08x) assign NET",
					 e->adapter->adapter_nr, e));
				break;

			default:
				DBG_ERR(("A: A(%d) E(%08x) unknown type=%08x",
					 e->adapter->adapter_nr, e,
					 type));
				return (-1);
			}
		}
		e->e.XNum = 1;
		e->e.RNum = 1;
		e->e.callback = diva_um_idi_xdi_callback;
		e->e.X = &e->XData;
		e->e.R = &e->RData;
		assign = 1;
	}
	e->status |= DIVA_UM_IDI_RC_PENDING;
	e->e.Req = Req;
	e->e.ReqCh = (byte) req->ReqCh;
	e->e.X->PLength = (word) req->data_length;
	e->e.X->P = (byte *) & req[1];	/* Our buffer is safe */

	DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
		 e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
		 e->e.ReqCh, e->e.X->PLength));

	e->rc_count++;

	if (e->adapter && e->adapter->d.request) {
		diva_um_idi_start_wdog(e);
		(*(e->adapter->d.request)) (&e->e);
	}

	if (assign) {
		if (e->e.Rc == OUT_OF_RESOURCES) {
			/*
			   XDI has no entities more, call was not forwarded to the card,
			   no callback will be scheduled
			 */
			DBG_ERR(("A: A(%d) E(%08x) XDI out of entities",
				 e->adapter->adapter_nr, e));

			e->e.Id = 0;
			e->e.ReqCh = 0;
			e->e.RcCh = 0;
			e->e.Ind = 0;
			e->e.IndCh = 0;
			e->e.XNum = 0;
			e->e.RNum = 0;
			e->e.callback = NULL;
			e->e.X = NULL;
			e->e.R = NULL;
			write_return_code(e, ASSIGN_RC | OUT_OF_RESOURCES);
			return (-2);
		} else {
			e->status |= DIVA_UM_IDI_ASSIGN_PENDING;
		}
	}

	return (0);
}

static int process_idi_rc(divas_um_idi_entity_t * e, byte rc)
{
	DBG_TRC(("A(%d) E(%08x) rc(%02x-%02x-%02x)",
		 e->adapter->adapter_nr, e, e->e.Id, rc, e->e.RcCh));

	if (e->status & DIVA_UM_IDI_ASSIGN_PENDING) {
		e->status &= ~DIVA_UM_IDI_ASSIGN_PENDING;
		if (rc != ASSIGN_OK) {
			DBG_ERR(("A: A(%d) E(%08x) ASSIGN failed",
				 e->adapter->adapter_nr, e));
			e->e.callback = NULL;
			e->e.Id = 0;
			e->e.Req = 0;
			e->e.ReqCh = 0;
			e->e.Rc = 0;
			e->e.RcCh = 0;
			e->e.Ind = 0;
			e->e.IndCh = 0;
			e->e.X = NULL;
			e->e.R = NULL;
			e->e.XNum = 0;
			e->e.RNum = 0;
		}
	}
	if ((e->e.Req == REMOVE) && e->e.Id && (rc == 0xff)) {
		DBG_ERR(("A: A(%d) E(%08x)  discard OK in REMOVE",
			 e->adapter->adapter_nr, e));
		return (0);	/* let us do it in the driver */
	}
	if ((e->e.Req == REMOVE) && (!e->e.Id)) {	/* REMOVE COMPLETE */
		e->e.callback = NULL;
		e->e.Id = 0;
		e->e.Req = 0;
		e->e.ReqCh = 0;
		e->e.Rc = 0;
		e->e.RcCh = 0;
		e->e.Ind = 0;
		e->e.IndCh = 0;
		e->e.X = NULL;
		e->e.R = NULL;
		e->e.XNum = 0;
		e->e.RNum = 0;
		e->rc_count = 0;
	}
	if ((e->e.Req == REMOVE) && (rc != 0xff)) {	/* REMOVE FAILED */
		DBG_ERR(("A: A(%d) E(%08x)  REMOVE FAILED",
			 e->adapter->adapter_nr, e));
	}
	write_return_code(e, rc);

	return (1);
}

static int process_idi_ind(divas_um_idi_entity_t * e, byte ind)
{
	int do_wakeup = 0;

	if (e->e.complete != 0x02) {
		diva_um_idi_ind_hdr_t *pind =
		    (diva_um_idi_ind_hdr_t *)
		    diva_data_q_get_segment4write(&e->data);
		if (pind) {
			e->e.RNum = 1;
			e->e.R->P = (byte *) & pind[1];
			e->e.R->PLength =
			    (word) (diva_data_q_get_max_length(&e->data) -
				    sizeof(*pind));
			DBG_TRC(("A(%d) E(%08x) ind_1(%02x-%02x-%02x)-[%d-%d]",
				 e->adapter->adapter_nr, e, e->e.Id, ind,
				 e->e.IndCh, e->e.RLength,
				 e->e.R->PLength));

		} else {
			DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-RNR",
				 e->adapter->adapter_nr, e, e->e.Id, ind,
				 e->e.IndCh));
			e->e.RNum = 0;
			e->e.RNR = 1;
			do_wakeup = 1;
		}
	} else {
		diva_um_idi_ind_hdr_t *pind =
		    (diva_um_idi_ind_hdr_t *) (e->e.R->P);

		DBG_TRC(("A(%d) E(%08x) ind(%02x-%02x-%02x)-[%d]",
			 e->adapter->adapter_nr, e, e->e.Id, ind,
			 e->e.IndCh, e->e.R->PLength));

		pind--;
		pind->type = DIVA_UM_IDI_IND;
		pind->hdr.ind.Ind = ind;
		pind->hdr.ind.IndCh = e->e.IndCh;
		pind->data_length = e->e.R->PLength;
		diva_data_q_ack_segment4write(&e->data,
					      (int) (sizeof(*pind) +
						     e->e.R->PLength));
		do_wakeup = 1;
	}

	if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
		do_wakeup = 0;
	}

	return (do_wakeup);
}

/* --------------------------------------------------------------------------
		Write return code to the return code queue of entity
	 -------------------------------------------------------------------------- */
static int write_return_code(divas_um_idi_entity_t * e, byte rc)
{
	diva_um_idi_ind_hdr_t *prc;

	if (!(prc =
	     (diva_um_idi_ind_hdr_t *) diva_data_q_get_segment4write(&e->rc)))
	{
		DBG_ERR(("A: A(%d) E(%08x) rc(%02x) lost",
			 e->adapter->adapter_nr, e, rc));
		e->status &= ~DIVA_UM_IDI_RC_PENDING;
		return (-1);
	}

	prc->type = DIVA_UM_IDI_IND_RC;
	prc->hdr.rc.Rc = rc;
	prc->hdr.rc.RcCh = e->e.RcCh;
	prc->data_length = 0;
	diva_data_q_ack_segment4write(&e->rc, sizeof(*prc));

	return (0);
}

/* --------------------------------------------------------------------------
		Return amount of entries that can be bead from this entity or
		-1 if adapter was removed
	 -------------------------------------------------------------------------- */
int diva_user_mode_idi_ind_ready(void *entity, void *os_handle)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	diva_os_spin_lock_magic_t old_irql;
	int ret;

	if (!entity)
		return (-1);
	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "ind_ready");
	e = (divas_um_idi_entity_t *) entity;
	a = e->adapter;

	if ((!a) || (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
		/*
		   Adapter was unloaded
		 */
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
		return (-1);	/* adapter was removed */
	}
	if (e->status & DIVA_UM_IDI_REMOVED) {
		/*
		   entity was removed as result of adapter removal
		   user should assign this entity again
		 */
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");
		return (-1);
	}

	ret = e->rc.count + e->data.count;

	if ((e->status & DIVA_UM_IDI_RC_PENDING) && !e->rc.count) {
		ret = 0;
	}

	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "ind_ready");

	return (ret);
}

void *diva_um_id_get_os_context(void *entity)
{
	return (((divas_um_idi_entity_t *) entity)->os_context);
}

int divas_um_idi_entity_assigned(void *entity)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	int ret;
	diva_os_spin_lock_magic_t old_irql;

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "assigned?");


	e = (divas_um_idi_entity_t *) entity;
	if (!e || (!(a = e->adapter)) ||
	    (e->status & DIVA_UM_IDI_REMOVED) ||
	    (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");
		return (0);
	}

	e->status |= DIVA_UM_IDI_REMOVE_PENDING;

	ret = (e->e.Id || e->rc_count
	       || (e->status & DIVA_UM_IDI_ASSIGN_PENDING));

	DBG_TRC(("Id:%02x, rc_count:%d, status:%08x", e->e.Id, e->rc_count,
		 e->status))

	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "assigned?");

	return (ret);
}

int divas_um_idi_entity_start_remove(void *entity)
{
	divas_um_idi_entity_t *e;
	diva_um_idi_adapter_t *a;
	diva_os_spin_lock_magic_t old_irql;

	diva_os_enter_spin_lock(&adapter_lock, &old_irql, "start_remove");

	e = (divas_um_idi_entity_t *) entity;
	if (!e || (!(a = e->adapter)) ||
	    (e->status & DIVA_UM_IDI_REMOVED) ||
	    (a->status & DIVA_UM_IDI_ADAPTER_REMOVED)) {
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
		return (0);
	}

	if (e->rc_count) {
		/*
		   Entity BUSY
		 */
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
		return (1);
	}

	if (!e->e.Id) {
		/*
		   Remove request was already pending, and arrived now
		 */
		diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");
		return (0);	/* REMOVE was pending */
	}

	/*
	   Now send remove request
	 */
	e->e.Req = REMOVE;
	e->e.ReqCh = 0;

	e->rc_count++;

	DBG_TRC(("A(%d) E(%08x) request(%02x-%02x-%02x (%d))",
		 e->adapter->adapter_nr, e, e->e.Id, e->e.Req,
		 e->e.ReqCh, e->e.X->PLength));

	if (a->d.request)
		(*(a->d.request)) (&e->e);

	diva_os_leave_spin_lock(&adapter_lock, &old_irql, "start_remove");

	return (0);
}