Free Electrons

Embedded Linux Experts

   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
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
/*********************************************************************
 *
 * Filename:      irlap.c
 * Version:       1.0
 * Description:   IrLAP implementation for Linux
 * Status:        Stable
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Mon Aug  4 20:40:53 1997
 * Modified at:   Tue Dec 14 09:26:44 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, write to the Free Software
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *     MA 02111-1307 USA
 *
 ********************************************************************/

#include <linux/slab.h>
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/random.h>
#include <linux/module.h>
#include <linux/seq_file.h>

#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include <net/irda/irqueue.h>
#include <net/irda/irlmp.h>
#include <net/irda/irlmp_frame.h>
#include <net/irda/irlap_frame.h>
#include <net/irda/irlap.h>
#include <net/irda/timer.h>
#include <net/irda/qos.h>

static hashbin_t *irlap = NULL;
int sysctl_slot_timeout = SLOT_TIMEOUT * 1000 / HZ;

/* This is the delay of missed pf period before generating an event
 * to the application. The spec mandate 3 seconds, but in some cases
 * it's way too long. - Jean II */
int sysctl_warn_noreply_time = 3;

extern void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb);
static void __irlap_close(struct irlap_cb *self);
static void irlap_init_qos_capabilities(struct irlap_cb *self,
					struct qos_info *qos_user);

#ifdef CONFIG_IRDA_DEBUG
static const char *const lap_reasons[] = {
	"ERROR, NOT USED",
	"LAP_DISC_INDICATION",
	"LAP_NO_RESPONSE",
	"LAP_RESET_INDICATION",
	"LAP_FOUND_NONE",
	"LAP_MEDIA_BUSY",
	"LAP_PRIMARY_CONFLICT",
	"ERROR, NOT USED",
};
#endif	/* CONFIG_IRDA_DEBUG */

int __init irlap_init(void)
{
	/* Check if the compiler did its job properly.
	 * May happen on some ARM configuration, check with Russell King. */
	IRDA_ASSERT(sizeof(struct xid_frame) == 14, ;);
	IRDA_ASSERT(sizeof(struct test_frame) == 10, ;);
	IRDA_ASSERT(sizeof(struct ua_frame) == 10, ;);
	IRDA_ASSERT(sizeof(struct snrm_frame) == 11, ;);

	/* Allocate master array */
	irlap = hashbin_new(HB_LOCK);
	if (irlap == NULL) {
		IRDA_ERROR("%s: can't allocate irlap hashbin!\n",
			   __func__);
		return -ENOMEM;
	}

	return 0;
}

void irlap_cleanup(void)
{
	IRDA_ASSERT(irlap != NULL, return;);

	hashbin_delete(irlap, (FREE_FUNC) __irlap_close);
}

/*
 * Function irlap_open (driver)
 *
 *    Initialize IrLAP layer
 *
 */
struct irlap_cb *irlap_open(struct net_device *dev, struct qos_info *qos,
			    const char *hw_name)
{
	struct irlap_cb *self;

	IRDA_DEBUG(4, "%s()\n", __func__);

	/* Initialize the irlap structure. */
	self = kzalloc(sizeof(struct irlap_cb), GFP_KERNEL);
	if (self == NULL)
		return NULL;

	self->magic = LAP_MAGIC;

	/* Make a binding between the layers */
	self->netdev = dev;
	self->qos_dev = qos;
	/* Copy hardware name */
	if(hw_name != NULL) {
		strlcpy(self->hw_name, hw_name, sizeof(self->hw_name));
	} else {
		self->hw_name[0] = '\0';
	}

	/* FIXME: should we get our own field? */
	dev->atalk_ptr = self;

	self->state = LAP_OFFLINE;

	/* Initialize transmit queue */
	skb_queue_head_init(&self->txq);
	skb_queue_head_init(&self->txq_ultra);
	skb_queue_head_init(&self->wx_list);

	/* My unique IrLAP device address! */
	/* We don't want the broadcast address, neither the NULL address
	 * (most often used to signify "invalid"), and we don't want an
	 * address already in use (otherwise connect won't be able
	 * to select the proper link). - Jean II */
	do {
		get_random_bytes(&self->saddr, sizeof(self->saddr));
	} while ((self->saddr == 0x0) || (self->saddr == BROADCAST) ||
		 (hashbin_lock_find(irlap, self->saddr, NULL)) );
	/* Copy to the driver */
	memcpy(dev->dev_addr, &self->saddr, 4);

	init_timer(&self->slot_timer);
	init_timer(&self->query_timer);
	init_timer(&self->discovery_timer);
	init_timer(&self->final_timer);
	init_timer(&self->poll_timer);
	init_timer(&self->wd_timer);
	init_timer(&self->backoff_timer);
	init_timer(&self->media_busy_timer);

	irlap_apply_default_connection_parameters(self);

	self->N3 = 3; /* # connections attempts to try before giving up */

	self->state = LAP_NDM;

	hashbin_insert(irlap, (irda_queue_t *) self, self->saddr, NULL);

	irlmp_register_link(self, self->saddr, &self->notify);

	return self;
}
EXPORT_SYMBOL(irlap_open);

/*
 * Function __irlap_close (self)
 *
 *    Remove IrLAP and all allocated memory. Stop any pending timers.
 *
 */
static void __irlap_close(struct irlap_cb *self)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Stop timers */
	del_timer(&self->slot_timer);
	del_timer(&self->query_timer);
	del_timer(&self->discovery_timer);
	del_timer(&self->final_timer);
	del_timer(&self->poll_timer);
	del_timer(&self->wd_timer);
	del_timer(&self->backoff_timer);
	del_timer(&self->media_busy_timer);

	irlap_flush_all_queues(self);

	self->magic = 0;

	kfree(self);
}

/*
 * Function irlap_close (self)
 *
 *    Remove IrLAP instance
 *
 */
void irlap_close(struct irlap_cb *self)
{
	struct irlap_cb *lap;

	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* We used to send a LAP_DISC_INDICATION here, but this was
	 * racy. This has been move within irlmp_unregister_link()
	 * itself. Jean II */

	/* Kill the LAP and all LSAPs on top of it */
	irlmp_unregister_link(self->saddr);
	self->notify.instance = NULL;

	/* Be sure that we manage to remove ourself from the hash */
	lap = hashbin_remove(irlap, self->saddr, NULL);
	if (!lap) {
		IRDA_DEBUG(1, "%s(), Didn't find myself!\n", __func__);
		return;
	}
	__irlap_close(lap);
}
EXPORT_SYMBOL(irlap_close);

/*
 * Function irlap_connect_indication (self, skb)
 *
 *    Another device is attempting to make a connection
 *
 */
void irlap_connect_indication(struct irlap_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	irlap_init_qos_capabilities(self, NULL); /* No user QoS! */

	irlmp_link_connect_indication(self->notify.instance, self->saddr,
				      self->daddr, &self->qos_tx, skb);
}

/*
 * Function irlap_connect_response (self, skb)
 *
 *    Service user has accepted incoming connection
 *
 */
void irlap_connect_response(struct irlap_cb *self, struct sk_buff *userdata)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	irlap_do_event(self, CONNECT_RESPONSE, userdata, NULL);
}

/*
 * Function irlap_connect_request (self, daddr, qos_user, sniff)
 *
 *    Request connection with another device, sniffing is not implemented
 *    yet.
 *
 */
void irlap_connect_request(struct irlap_cb *self, __u32 daddr,
			   struct qos_info *qos_user, int sniff)
{
	IRDA_DEBUG(3, "%s(), daddr=0x%08x\n", __func__, daddr);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	self->daddr = daddr;

	/*
	 *  If the service user specifies QoS values for this connection,
	 *  then use them
	 */
	irlap_init_qos_capabilities(self, qos_user);

	if ((self->state == LAP_NDM) && !self->media_busy)
		irlap_do_event(self, CONNECT_REQUEST, NULL, NULL);
	else
		self->connect_pending = TRUE;
}

/*
 * Function irlap_connect_confirm (self, skb)
 *
 *    Connection request has been accepted
 *
 */
void irlap_connect_confirm(struct irlap_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	irlmp_link_connect_confirm(self->notify.instance, &self->qos_tx, skb);
}

/*
 * Function irlap_data_indication (self, skb)
 *
 *    Received data frames from IR-port, so we just pass them up to
 *    IrLMP for further processing
 *
 */
void irlap_data_indication(struct irlap_cb *self, struct sk_buff *skb,
			   int unreliable)
{
	/* Hide LAP header from IrLMP layer */
	skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER);

	irlmp_link_data_indication(self->notify.instance, skb, unreliable);
}


/*
 * Function irlap_data_request (self, skb)
 *
 *    Queue data for transmission, must wait until XMIT state
 *
 */
void irlap_data_request(struct irlap_cb *self, struct sk_buff *skb,
			int unreliable)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	IRDA_DEBUG(3, "%s()\n", __func__);

	IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER),
		    return;);
	skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER);

	/*
	 *  Must set frame format now so that the rest of the code knows
	 *  if its dealing with an I or an UI frame
	 */
	if (unreliable)
		skb->data[1] = UI_FRAME;
	else
		skb->data[1] = I_FRAME;

	/* Don't forget to refcount it - see irlmp_connect_request(). */
	skb_get(skb);

	/* Add at the end of the queue (keep ordering) - Jean II */
	skb_queue_tail(&self->txq, skb);

	/*
	 *  Send event if this frame only if we are in the right state
	 *  FIXME: udata should be sent first! (skb_queue_head?)
	 */
	if ((self->state == LAP_XMIT_P) || (self->state == LAP_XMIT_S)) {
		/* If we are not already processing the Tx queue, trigger
		 * transmission immediately - Jean II */
		if((skb_queue_len(&self->txq) <= 1) && (!self->local_busy))
			irlap_do_event(self, DATA_REQUEST, skb, NULL);
		/* Otherwise, the packets will be sent normally at the
		 * next pf-poll - Jean II */
	}
}

/*
 * Function irlap_unitdata_request (self, skb)
 *
 *    Send Ultra data. This is data that must be sent outside any connection
 *
 */
#ifdef CONFIG_IRDA_ULTRA
void irlap_unitdata_request(struct irlap_cb *self, struct sk_buff *skb)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	IRDA_DEBUG(3, "%s()\n", __func__);

	IRDA_ASSERT(skb_headroom(skb) >= (LAP_ADDR_HEADER+LAP_CTRL_HEADER),
	       return;);
	skb_push(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER);

	skb->data[0] = CBROADCAST;
	skb->data[1] = UI_FRAME;

	/* Don't need to refcount, see irlmp_connless_data_request() */

	skb_queue_tail(&self->txq_ultra, skb);

	irlap_do_event(self, SEND_UI_FRAME, NULL, NULL);
}
#endif /*CONFIG_IRDA_ULTRA */

/*
 * Function irlap_udata_indication (self, skb)
 *
 *    Receive Ultra data. This is data that is received outside any connection
 *
 */
#ifdef CONFIG_IRDA_ULTRA
void irlap_unitdata_indication(struct irlap_cb *self, struct sk_buff *skb)
{
	IRDA_DEBUG(1, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
	IRDA_ASSERT(skb != NULL, return;);

	/* Hide LAP header from IrLMP layer */
	skb_pull(skb, LAP_ADDR_HEADER+LAP_CTRL_HEADER);

	irlmp_link_unitdata_indication(self->notify.instance, skb);
}
#endif /* CONFIG_IRDA_ULTRA */

/*
 * Function irlap_disconnect_request (void)
 *
 *    Request to disconnect connection by service user
 */
void irlap_disconnect_request(struct irlap_cb *self)
{
	IRDA_DEBUG(3, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Don't disconnect until all data frames are successfully sent */
	if (!skb_queue_empty(&self->txq)) {
		self->disconnect_pending = TRUE;
		return;
	}

	/* Check if we are in the right state for disconnecting */
	switch (self->state) {
	case LAP_XMIT_P:        /* FALLTHROUGH */
	case LAP_XMIT_S:        /* FALLTHROUGH */
	case LAP_CONN:          /* FALLTHROUGH */
	case LAP_RESET_WAIT:    /* FALLTHROUGH */
	case LAP_RESET_CHECK:
		irlap_do_event(self, DISCONNECT_REQUEST, NULL, NULL);
		break;
	default:
		IRDA_DEBUG(2, "%s(), disconnect pending!\n", __func__);
		self->disconnect_pending = TRUE;
		break;
	}
}

/*
 * Function irlap_disconnect_indication (void)
 *
 *    Disconnect request from other device
 *
 */
void irlap_disconnect_indication(struct irlap_cb *self, LAP_REASON reason)
{
	IRDA_DEBUG(1, "%s(), reason=%s\n", __func__, lap_reasons[reason]);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Flush queues */
	irlap_flush_all_queues(self);

	switch (reason) {
	case LAP_RESET_INDICATION:
		IRDA_DEBUG(1, "%s(), Sending reset request!\n", __func__);
		irlap_do_event(self, RESET_REQUEST, NULL, NULL);
		break;
	case LAP_NO_RESPONSE:	   /* FALLTHROUGH */
	case LAP_DISC_INDICATION:  /* FALLTHROUGH */
	case LAP_FOUND_NONE:       /* FALLTHROUGH */
	case LAP_MEDIA_BUSY:
		irlmp_link_disconnect_indication(self->notify.instance, self,
						 reason, NULL);
		break;
	default:
		IRDA_ERROR("%s: Unknown reason %d\n", __func__, reason);
	}
}

/*
 * Function irlap_discovery_request (gen_addr_bit)
 *
 *    Start one single discovery operation.
 *
 */
void irlap_discovery_request(struct irlap_cb *self, discovery_t *discovery)
{
	struct irlap_info info;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
	IRDA_ASSERT(discovery != NULL, return;);

	IRDA_DEBUG(4, "%s(), nslots = %d\n", __func__, discovery->nslots);

	IRDA_ASSERT((discovery->nslots == 1) || (discovery->nslots == 6) ||
		    (discovery->nslots == 8) || (discovery->nslots == 16),
		    return;);

	/* Discovery is only possible in NDM mode */
	if (self->state != LAP_NDM) {
		IRDA_DEBUG(4, "%s(), discovery only possible in NDM mode\n",
			   __func__);
		irlap_discovery_confirm(self, NULL);
		/* Note : in theory, if we are not in NDM, we could postpone
		 * the discovery like we do for connection request.
		 * In practice, it's not worth it. If the media was busy,
		 * it's likely next time around it won't be busy. If we are
		 * in REPLY state, we will get passive discovery info & event.
		 * Jean II */
		return;
	}

	/* Check if last discovery request finished in time, or if
	 * it was aborted due to the media busy flag. */
	if (self->discovery_log != NULL) {
		hashbin_delete(self->discovery_log, (FREE_FUNC) kfree);
		self->discovery_log = NULL;
	}

	/* All operations will occur at predictable time, no need to lock */
	self->discovery_log = hashbin_new(HB_NOLOCK);

	if (self->discovery_log == NULL) {
		IRDA_WARNING("%s(), Unable to allocate discovery log!\n",
			     __func__);
		return;
	}

	info.S = discovery->nslots; /* Number of slots */
	info.s = 0; /* Current slot */

	self->discovery_cmd = discovery;
	info.discovery = discovery;

	/* sysctl_slot_timeout bounds are checked in irsysctl.c - Jean II */
	self->slot_timeout = sysctl_slot_timeout * HZ / 1000;

	irlap_do_event(self, DISCOVERY_REQUEST, NULL, &info);
}

/*
 * Function irlap_discovery_confirm (log)
 *
 *    A device has been discovered in front of this station, we
 *    report directly to LMP.
 */
void irlap_discovery_confirm(struct irlap_cb *self, hashbin_t *discovery_log)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	IRDA_ASSERT(self->notify.instance != NULL, return;);

	/*
	 * Check for successful discovery, since we are then allowed to clear
	 * the media busy condition (IrLAP 6.13.4 - p.94). This should allow
	 * us to make connection attempts much faster and easier (i.e. no
	 * collisions).
	 * Setting media busy to false will also generate an event allowing
	 * to process pending events in NDM state machine.
	 * Note : the spec doesn't define what's a successful discovery is.
	 * If we want Ultra to work, it's successful even if there is
	 * nobody discovered - Jean II
	 */
	if (discovery_log)
		irda_device_set_media_busy(self->netdev, FALSE);

	/* Inform IrLMP */
	irlmp_link_discovery_confirm(self->notify.instance, discovery_log);
}

/*
 * Function irlap_discovery_indication (log)
 *
 *    Somebody is trying to discover us!
 *
 */
void irlap_discovery_indication(struct irlap_cb *self, discovery_t *discovery)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
	IRDA_ASSERT(discovery != NULL, return;);

	IRDA_ASSERT(self->notify.instance != NULL, return;);

	/* A device is very likely to connect immediately after it performs
	 * a successful discovery. This means that in our case, we are much
	 * more likely to receive a connection request over the medium.
	 * So, we backoff to avoid collisions.
	 * IrLAP spec 6.13.4 suggest 100ms...
	 * Note : this little trick actually make a *BIG* difference. If I set
	 * my Linux box with discovery enabled and one Ultra frame sent every
	 * second, my Palm has no trouble connecting to it every time !
	 * Jean II */
	irda_device_set_media_busy(self->netdev, SMALL);

	irlmp_link_discovery_indication(self->notify.instance, discovery);
}

/*
 * Function irlap_status_indication (quality_of_link)
 */
void irlap_status_indication(struct irlap_cb *self, int quality_of_link)
{
	switch (quality_of_link) {
	case STATUS_NO_ACTIVITY:
		IRDA_MESSAGE("IrLAP, no activity on link!\n");
		break;
	case STATUS_NOISY:
		IRDA_MESSAGE("IrLAP, noisy link!\n");
		break;
	default:
		break;
	}
	irlmp_status_indication(self->notify.instance,
				quality_of_link, LOCK_NO_CHANGE);
}

/*
 * Function irlap_reset_indication (void)
 */
void irlap_reset_indication(struct irlap_cb *self)
{
	IRDA_DEBUG(1, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	if (self->state == LAP_RESET_WAIT)
		irlap_do_event(self, RESET_REQUEST, NULL, NULL);
	else
		irlap_do_event(self, RESET_RESPONSE, NULL, NULL);
}

/*
 * Function irlap_reset_confirm (void)
 */
void irlap_reset_confirm(void)
{
	IRDA_DEBUG(1, "%s()\n", __func__);
}

/*
 * Function irlap_generate_rand_time_slot (S, s)
 *
 *    Generate a random time slot between s and S-1 where
 *    S = Number of slots (0 -> S-1)
 *    s = Current slot
 */
int irlap_generate_rand_time_slot(int S, int s)
{
	static int rand;
	int slot;

	IRDA_ASSERT((S - s) > 0, return 0;);

	rand += jiffies;
	rand ^= (rand << 12);
	rand ^= (rand >> 20);

	slot = s + rand % (S-s);

	IRDA_ASSERT((slot >= s) || (slot < S), return 0;);

	return slot;
}

/*
 * Function irlap_update_nr_received (nr)
 *
 *    Remove all acknowledged frames in current window queue. This code is
 *    not intuitive and you should not try to change it. If you think it
 *    contains bugs, please mail a patch to the author instead.
 */
void irlap_update_nr_received(struct irlap_cb *self, int nr)
{
	struct sk_buff *skb = NULL;
	int count = 0;

	/*
	 * Remove all the ack-ed frames from the window queue.
	 */

	/*
	 *  Optimize for the common case. It is most likely that the receiver
	 *  will acknowledge all the frames we have sent! So in that case we
	 *  delete all frames stored in window.
	 */
	if (nr == self->vs) {
		while ((skb = skb_dequeue(&self->wx_list)) != NULL) {
			dev_kfree_skb(skb);
		}
		/* The last acked frame is the next to send minus one */
		self->va = nr - 1;
	} else {
		/* Remove all acknowledged frames in current window */
		while ((skb_peek(&self->wx_list) != NULL) &&
		       (((self->va+1) % 8) != nr))
		{
			skb = skb_dequeue(&self->wx_list);
			dev_kfree_skb(skb);

			self->va = (self->va + 1) % 8;
			count++;
		}
	}

	/* Advance window */
	self->window = self->window_size - skb_queue_len(&self->wx_list);
}

/*
 * Function irlap_validate_ns_received (ns)
 *
 *    Validate the next to send (ns) field from received frame.
 */
int irlap_validate_ns_received(struct irlap_cb *self, int ns)
{
	/*  ns as expected?  */
	if (ns == self->vr)
		return NS_EXPECTED;
	/*
	 *  Stations are allowed to treat invalid NS as unexpected NS
	 *  IrLAP, Recv ... with-invalid-Ns. p. 84
	 */
	return NS_UNEXPECTED;

	/* return NR_INVALID; */
}
/*
 * Function irlap_validate_nr_received (nr)
 *
 *    Validate the next to receive (nr) field from received frame.
 *
 */
int irlap_validate_nr_received(struct irlap_cb *self, int nr)
{
	/*  nr as expected?  */
	if (nr == self->vs) {
		IRDA_DEBUG(4, "%s(), expected!\n", __func__);
		return NR_EXPECTED;
	}

	/*
	 *  unexpected nr? (but within current window), first we check if the
	 *  ns numbers of the frames in the current window wrap.
	 */
	if (self->va < self->vs) {
		if ((nr >= self->va) && (nr <= self->vs))
			return NR_UNEXPECTED;
	} else {
		if ((nr >= self->va) || (nr <= self->vs))
			return NR_UNEXPECTED;
	}

	/* Invalid nr!  */
	return NR_INVALID;
}

/*
 * Function irlap_initiate_connection_state ()
 *
 *    Initialize the connection state parameters
 *
 */
void irlap_initiate_connection_state(struct irlap_cb *self)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Next to send and next to receive */
	self->vs = self->vr = 0;

	/* Last frame which got acked (0 - 1) % 8 */
	self->va = 7;

	self->window = 1;

	self->remote_busy = FALSE;
	self->retry_count = 0;
}

/*
 * Function irlap_wait_min_turn_around (self, qos)
 *
 *    Wait negotiated minimum turn around time, this function actually sets
 *    the number of BOS's that must be sent before the next transmitted
 *    frame in order to delay for the specified amount of time. This is
 *    done to avoid using timers, and the forbidden udelay!
 */
void irlap_wait_min_turn_around(struct irlap_cb *self, struct qos_info *qos)
{
	__u32 min_turn_time;
	__u32 speed;

	/* Get QoS values.  */
	speed = qos->baud_rate.value;
	min_turn_time = qos->min_turn_time.value;

	/* No need to calculate XBOFs for speeds over 115200 bps */
	if (speed > 115200) {
		self->mtt_required = min_turn_time;
		return;
	}

	/*
	 *  Send additional BOF's for the next frame for the requested
	 *  min turn time, so now we must calculate how many chars (XBOF's) we
	 *  must send for the requested time period (min turn time)
	 */
	self->xbofs_delay = irlap_min_turn_time_in_bytes(speed, min_turn_time);
}

/*
 * Function irlap_flush_all_queues (void)
 *
 *    Flush all queues
 *
 */
void irlap_flush_all_queues(struct irlap_cb *self)
{
	struct sk_buff* skb;

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Free transmission queue */
	while ((skb = skb_dequeue(&self->txq)) != NULL)
		dev_kfree_skb(skb);

	while ((skb = skb_dequeue(&self->txq_ultra)) != NULL)
		dev_kfree_skb(skb);

	/* Free sliding window buffered packets */
	while ((skb = skb_dequeue(&self->wx_list)) != NULL)
		dev_kfree_skb(skb);
}

/*
 * Function irlap_setspeed (self, speed)
 *
 *    Change the speed of the IrDA port
 *
 */
static void irlap_change_speed(struct irlap_cb *self, __u32 speed, int now)
{
	struct sk_buff *skb;

	IRDA_DEBUG(0, "%s(), setting speed to %d\n", __func__, speed);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	self->speed = speed;

	/* Change speed now, or just piggyback speed on frames */
	if (now) {
		/* Send down empty frame to trigger speed change */
		skb = alloc_skb(0, GFP_ATOMIC);
		if (skb)
			irlap_queue_xmit(self, skb);
	}
}

/*
 * Function irlap_init_qos_capabilities (self, qos)
 *
 *    Initialize QoS for this IrLAP session, What we do is to compute the
 *    intersection of the QoS capabilities for the user, driver and for
 *    IrLAP itself. Normally, IrLAP will not specify any values, but it can
 *    be used to restrict certain values.
 */
static void irlap_init_qos_capabilities(struct irlap_cb *self,
					struct qos_info *qos_user)
{
	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
	IRDA_ASSERT(self->netdev != NULL, return;);

	/* Start out with the maximum QoS support possible */
	irda_init_max_qos_capabilies(&self->qos_rx);

	/* Apply drivers QoS capabilities */
	irda_qos_compute_intersection(&self->qos_rx, self->qos_dev);

	/*
	 *  Check for user supplied QoS parameters. The service user is only
	 *  allowed to supply these values. We check each parameter since the
	 *  user may not have set all of them.
	 */
	if (qos_user) {
		IRDA_DEBUG(1, "%s(), Found user specified QoS!\n", __func__);

		if (qos_user->baud_rate.bits)
			self->qos_rx.baud_rate.bits &= qos_user->baud_rate.bits;

		if (qos_user->max_turn_time.bits)
			self->qos_rx.max_turn_time.bits &= qos_user->max_turn_time.bits;
		if (qos_user->data_size.bits)
			self->qos_rx.data_size.bits &= qos_user->data_size.bits;

		if (qos_user->link_disc_time.bits)
			self->qos_rx.link_disc_time.bits &= qos_user->link_disc_time.bits;
	}

	/* Use 500ms in IrLAP for now */
	self->qos_rx.max_turn_time.bits &= 0x01;

	/* Set data size */
	/*self->qos_rx.data_size.bits &= 0x03;*/

	irda_qos_bits_to_value(&self->qos_rx);
}

/*
 * Function irlap_apply_default_connection_parameters (void, now)
 *
 *    Use the default connection and transmission parameters
 */
void irlap_apply_default_connection_parameters(struct irlap_cb *self)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* xbofs : Default value in NDM */
	self->next_bofs   = 12;
	self->bofs_count  = 12;

	/* NDM Speed is 9600 */
	irlap_change_speed(self, 9600, TRUE);

	/* Set mbusy when going to NDM state */
	irda_device_set_media_busy(self->netdev, TRUE);

	/*
	 * Generate random connection address for this session, which must
	 * be 7 bits wide and different from 0x00 and 0xfe
	 */
	while ((self->caddr == 0x00) || (self->caddr == 0xfe)) {
		get_random_bytes(&self->caddr, sizeof(self->caddr));
		self->caddr &= 0xfe;
	}

	/* Use default values until connection has been negitiated */
	self->slot_timeout = sysctl_slot_timeout;
	self->final_timeout = FINAL_TIMEOUT;
	self->poll_timeout = POLL_TIMEOUT;
	self->wd_timeout = WD_TIMEOUT;

	/* Set some default values */
	self->qos_tx.baud_rate.value = 9600;
	self->qos_rx.baud_rate.value = 9600;
	self->qos_tx.max_turn_time.value = 0;
	self->qos_rx.max_turn_time.value = 0;
	self->qos_tx.min_turn_time.value = 0;
	self->qos_rx.min_turn_time.value = 0;
	self->qos_tx.data_size.value = 64;
	self->qos_rx.data_size.value = 64;
	self->qos_tx.window_size.value = 1;
	self->qos_rx.window_size.value = 1;
	self->qos_tx.additional_bofs.value = 12;
	self->qos_rx.additional_bofs.value = 12;
	self->qos_tx.link_disc_time.value = 0;
	self->qos_rx.link_disc_time.value = 0;

	irlap_flush_all_queues(self);

	self->disconnect_pending = FALSE;
	self->connect_pending = FALSE;
}

/*
 * Function irlap_apply_connection_parameters (qos, now)
 *
 *    Initialize IrLAP with the negotiated QoS values
 *
 * If 'now' is false, the speed and xbofs will be changed after the next
 * frame is sent.
 * If 'now' is true, the speed and xbofs is changed immediately
 */
void irlap_apply_connection_parameters(struct irlap_cb *self, int now)
{
	IRDA_DEBUG(4, "%s()\n", __func__);

	IRDA_ASSERT(self != NULL, return;);
	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);

	/* Set the negotiated xbofs value */
	self->next_bofs   = self->qos_tx.additional_bofs.value;
	if (now)
		self->bofs_count = self->next_bofs;

	/* Set the negotiated link speed (may need the new xbofs value) */
	irlap_change_speed(self, self->qos_tx.baud_rate.value, now);

	self->window_size = self->qos_tx.window_size.value;
	self->window      = self->qos_tx.window_size.value;

#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
	/*
	 *  Calculate how many bytes it is possible to transmit before the
	 *  link must be turned around
	 */
	self->line_capacity =
		irlap_max_line_capacity(self->qos_tx.baud_rate.value,
					self->qos_tx.max_turn_time.value);
	self->bytes_left = self->line_capacity;
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */


	/*
	 *  Initialize timeout values, some of the rules are listed on
	 *  page 92 in IrLAP.
	 */
	IRDA_ASSERT(self->qos_tx.max_turn_time.value != 0, return;);
	IRDA_ASSERT(self->qos_rx.max_turn_time.value != 0, return;);
	/* The poll timeout applies only to the primary station.
	 * It defines the maximum time the primary stay in XMIT mode
	 * before timeout and turning the link around (sending a RR).
	 * Or, this is how much we can keep the pf bit in primary mode.
	 * Therefore, it must be lower or equal than our *OWN* max turn around.
	 * Jean II */
	self->poll_timeout = self->qos_tx.max_turn_time.value * HZ / 1000;
	/* The Final timeout applies only to the primary station.
	 * It defines the maximum time the primary wait (mostly in RECV mode)
	 * for an answer from the secondary station before polling it again.
	 * Therefore, it must be greater or equal than our *PARTNER*
	 * max turn around time - Jean II */
	self->final_timeout = self->qos_rx.max_turn_time.value * HZ / 1000;
	/* The Watchdog Bit timeout applies only to the secondary station.
	 * It defines the maximum time the secondary wait (mostly in RECV mode)
	 * for poll from the primary station before getting annoyed.
	 * Therefore, it must be greater or equal than our *PARTNER*
	 * max turn around time - Jean II */
	self->wd_timeout = self->final_timeout * 2;

	/*
	 * N1 and N2 are maximum retry count for *both* the final timer
	 * and the wd timer (with a factor 2) as defined above.
	 * After N1 retry of a timer, we give a warning to the user.
	 * After N2 retry, we consider the link dead and disconnect it.
	 * Jean II
	 */

	/*
	 *  Set N1 to 0 if Link Disconnect/Threshold Time = 3 and set it to
	 *  3 seconds otherwise. See page 71 in IrLAP for more details.
	 *  Actually, it's not always 3 seconds, as we allow to set
	 *  it via sysctl... Max maxtt is 500ms, and N1 need to be multiple
	 *  of 2, so 1 second is minimum we can allow. - Jean II
	 */
	if (self->qos_tx.link_disc_time.value == sysctl_warn_noreply_time)
		/*
		 * If we set N1 to 0, it will trigger immediately, which is
		 * not what we want. What we really want is to disable it,
		 * Jean II
		 */
		self->N1 = -2; /* Disable - Need to be multiple of 2*/
	else
		self->N1 = sysctl_warn_noreply_time * 1000 /
		  self->qos_rx.max_turn_time.value;

	IRDA_DEBUG(4, "Setting N1 = %d\n", self->N1);

	/* Set N2 to match our own disconnect time */
	self->N2 = self->qos_tx.link_disc_time.value * 1000 /
		self->qos_rx.max_turn_time.value;
	IRDA_DEBUG(4, "Setting N2 = %d\n", self->N2);
}

#ifdef CONFIG_PROC_FS
struct irlap_iter_state {
	int id;
};

static void *irlap_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct irlap_iter_state *iter = seq->private;
	struct irlap_cb *self;

	/* Protect our access to the tsap list */
	spin_lock_irq(&irlap->hb_spinlock);
	iter->id = 0;

	for (self = (struct irlap_cb *) hashbin_get_first(irlap);
	     self; self = (struct irlap_cb *) hashbin_get_next(irlap)) {
		if (iter->id == *pos)
			break;
		++iter->id;
	}

	return self;
}

static void *irlap_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct irlap_iter_state *iter = seq->private;

	++*pos;
	++iter->id;
	return (void *) hashbin_get_next(irlap);
}

static void irlap_seq_stop(struct seq_file *seq, void *v)
{
	spin_unlock_irq(&irlap->hb_spinlock);
}

static int irlap_seq_show(struct seq_file *seq, void *v)
{
	const struct irlap_iter_state *iter = seq->private;
	const struct irlap_cb *self = v;

	IRDA_ASSERT(self->magic == LAP_MAGIC, return -EINVAL;);

	seq_printf(seq, "irlap%d ", iter->id);
	seq_printf(seq, "state: %s\n",
		   irlap_state[self->state]);

	seq_printf(seq, "  device name: %s, ",
		   (self->netdev) ? self->netdev->name : "bug");
	seq_printf(seq, "hardware name: %s\n", self->hw_name);

	seq_printf(seq, "  caddr: %#02x, ", self->caddr);
	seq_printf(seq, "saddr: %#08x, ", self->saddr);
	seq_printf(seq, "daddr: %#08x\n", self->daddr);

	seq_printf(seq, "  win size: %d, ",
		   self->window_size);
	seq_printf(seq, "win: %d, ", self->window);
#ifdef CONFIG_IRDA_DYNAMIC_WINDOW
	seq_printf(seq, "line capacity: %d, ",
		   self->line_capacity);
	seq_printf(seq, "bytes left: %d\n", self->bytes_left);
#endif /* CONFIG_IRDA_DYNAMIC_WINDOW */
	seq_printf(seq, "  tx queue len: %d ",
		   skb_queue_len(&self->txq));
	seq_printf(seq, "win queue len: %d ",
		   skb_queue_len(&self->wx_list));
	seq_printf(seq, "rbusy: %s", self->remote_busy ?
		   "TRUE" : "FALSE");
	seq_printf(seq, " mbusy: %s\n", self->media_busy ?
		   "TRUE" : "FALSE");

	seq_printf(seq, "  retrans: %d ", self->retry_count);
	seq_printf(seq, "vs: %d ", self->vs);
	seq_printf(seq, "vr: %d ", self->vr);
	seq_printf(seq, "va: %d\n", self->va);

	seq_printf(seq, "  qos\tbps\tmaxtt\tdsize\twinsize\taddbofs\tmintt\tldisc\tcomp\n");

	seq_printf(seq, "  tx\t%d\t",
		   self->qos_tx.baud_rate.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.max_turn_time.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.data_size.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.window_size.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.additional_bofs.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.min_turn_time.value);
	seq_printf(seq, "%d\t",
		   self->qos_tx.link_disc_time.value);
	seq_printf(seq, "\n");

	seq_printf(seq, "  rx\t%d\t",
		   self->qos_rx.baud_rate.value);
	seq_printf(seq, "%d\t",
		   self->qos_rx.max_turn_time.value);
	seq_printf(seq, "%d\t",
		   self->qos_rx.data_size.value);
	seq_printf(seq, "%d\t",
		   self->qos_rx.window_size.value);
	seq_printf(seq, "%d\t",
		   self->qos_rx.additional_bofs.value);
	seq_printf(seq, "%d\t",
		   self->qos_rx.min_turn_time.value);
	seq_printf(seq, "%d\n",
		   self->qos_rx.link_disc_time.value);

	return 0;
}

static const struct seq_operations irlap_seq_ops = {
	.start  = irlap_seq_start,
	.next   = irlap_seq_next,
	.stop   = irlap_seq_stop,
	.show   = irlap_seq_show,
};

static int irlap_seq_open(struct inode *inode, struct file *file)
{
	if (irlap == NULL)
		return -EINVAL;

	return seq_open_private(file, &irlap_seq_ops,
			sizeof(struct irlap_iter_state));
}

const struct file_operations irlap_seq_fops = {
	.owner		= THIS_MODULE,
	.open           = irlap_seq_open,
	.read           = seq_read,
	.llseek         = seq_lseek,
	.release	= seq_release_private,
};

#endif /* CONFIG_PROC_FS */