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
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *****************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <net/mac80211.h>

#include "iwl-eeprom.h"
#include "iwl-debug.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-power.h"
#include "iwl-shared.h"
#include "iwl-agn.h"
#include "iwl-trans.h"

const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
			      struct ieee80211_sta_ht_cap *ht_info,
			      enum ieee80211_band band)
{
	u16 max_bit_rate = 0;
	u8 rx_chains_num = hw_params(priv).rx_chains_num;
	u8 tx_chains_num = hw_params(priv).tx_chains_num;

	ht_info->cap = 0;
	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));

	ht_info->ht_supported = true;

	if (cfg(priv)->ht_params &&
	    cfg(priv)->ht_params->ht_greenfield_support)
		ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
	ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
	max_bit_rate = MAX_BIT_RATE_20_MHZ;
	if (hw_params(priv).ht40_channel & BIT(band)) {
		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
		ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
		ht_info->mcs.rx_mask[4] = 0x01;
		max_bit_rate = MAX_BIT_RATE_40_MHZ;
	}

	if (iwlagn_mod_params.amsdu_size_8K)
		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;

	ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
	ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;

	ht_info->mcs.rx_mask[0] = 0xFF;
	if (rx_chains_num >= 2)
		ht_info->mcs.rx_mask[1] = 0xFF;
	if (rx_chains_num >= 3)
		ht_info->mcs.rx_mask[2] = 0xFF;

	/* Highest supported Rx data rate */
	max_bit_rate *= rx_chains_num;
	WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
	ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);

	/* Tx MCS capabilities */
	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
	if (tx_chains_num != rx_chains_num) {
		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
		ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
	}
}

/**
 * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
 */
int iwl_init_geos(struct iwl_priv *priv)
{
	struct iwl_channel_info *ch;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *channels;
	struct ieee80211_channel *geo_ch;
	struct ieee80211_rate *rates;
	int i = 0;
	s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;

	if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
	    priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
		IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
		set_bit(STATUS_GEO_CONFIGURED, &priv->status);
		return 0;
	}

	channels = kcalloc(priv->channel_count,
			   sizeof(struct ieee80211_channel), GFP_KERNEL);
	if (!channels)
		return -ENOMEM;

	rates = kcalloc(IWL_RATE_COUNT_LEGACY, sizeof(struct ieee80211_rate),
			GFP_KERNEL);
	if (!rates) {
		kfree(channels);
		return -ENOMEM;
	}

	/* 5.2GHz channels start after the 2.4GHz channels */
	sband = &priv->bands[IEEE80211_BAND_5GHZ];
	sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
	/* just OFDM */
	sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
	sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;

	if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
		iwl_init_ht_hw_capab(priv, &sband->ht_cap,
					 IEEE80211_BAND_5GHZ);

	sband = &priv->bands[IEEE80211_BAND_2GHZ];
	sband->channels = channels;
	/* OFDM & CCK */
	sband->bitrates = rates;
	sband->n_bitrates = IWL_RATE_COUNT_LEGACY;

	if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
		iwl_init_ht_hw_capab(priv, &sband->ht_cap,
					 IEEE80211_BAND_2GHZ);

	priv->ieee_channels = channels;
	priv->ieee_rates = rates;

	for (i = 0;  i < priv->channel_count; i++) {
		ch = &priv->channel_info[i];

		/* FIXME: might be removed if scan is OK */
		if (!is_channel_valid(ch))
			continue;

		sband =  &priv->bands[ch->band];

		geo_ch = &sband->channels[sband->n_channels++];

		geo_ch->center_freq =
			ieee80211_channel_to_frequency(ch->channel, ch->band);
		geo_ch->max_power = ch->max_power_avg;
		geo_ch->max_antenna_gain = 0xff;
		geo_ch->hw_value = ch->channel;

		if (is_channel_valid(ch)) {
			if (!(ch->flags & EEPROM_CHANNEL_IBSS))
				geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;

			if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
				geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;

			if (ch->flags & EEPROM_CHANNEL_RADAR)
				geo_ch->flags |= IEEE80211_CHAN_RADAR;

			geo_ch->flags |= ch->ht40_extension_channel;

			if (ch->max_power_avg > max_tx_power)
				max_tx_power = ch->max_power_avg;
		} else {
			geo_ch->flags |= IEEE80211_CHAN_DISABLED;
		}

		IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
				ch->channel, geo_ch->center_freq,
				is_channel_a_band(ch) ?  "5.2" : "2.4",
				geo_ch->flags & IEEE80211_CHAN_DISABLED ?
				"restricted" : "valid",
				 geo_ch->flags);
	}

	priv->tx_power_device_lmt = max_tx_power;
	priv->tx_power_user_lmt = max_tx_power;
	priv->tx_power_next = max_tx_power;

	if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
	     hw_params(priv).sku & EEPROM_SKU_CAP_BAND_52GHZ) {
		IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
			"Please send your %s to maintainer.\n",
			trans(priv)->hw_id_str);
		hw_params(priv).sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
	}

	IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
		   priv->bands[IEEE80211_BAND_2GHZ].n_channels,
		   priv->bands[IEEE80211_BAND_5GHZ].n_channels);

	set_bit(STATUS_GEO_CONFIGURED, &priv->status);

	return 0;
}

/*
 * iwl_free_geos - undo allocations in iwl_init_geos
 */
void iwl_free_geos(struct iwl_priv *priv)
{
	kfree(priv->ieee_channels);
	kfree(priv->ieee_rates);
	clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}

static bool iwl_is_channel_extension(struct iwl_priv *priv,
				     enum ieee80211_band band,
				     u16 channel, u8 extension_chan_offset)
{
	const struct iwl_channel_info *ch_info;

	ch_info = iwl_get_channel_info(priv, band, channel);
	if (!is_channel_valid(ch_info))
		return false;

	if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
		return !(ch_info->ht40_extension_channel &
					IEEE80211_CHAN_NO_HT40PLUS);
	else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
		return !(ch_info->ht40_extension_channel &
					IEEE80211_CHAN_NO_HT40MINUS);

	return false;
}

bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
			    struct iwl_rxon_context *ctx,
			    struct ieee80211_sta_ht_cap *ht_cap)
{
	if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
		return false;

	/*
	 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
	 * the bit will not set if it is pure 40MHz case
	 */
	if (ht_cap && !ht_cap->ht_supported)
		return false;

#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (priv->disable_ht40)
		return false;
#endif

	return iwl_is_channel_extension(priv, priv->band,
			le16_to_cpu(ctx->staging.channel),
			ctx->ht.extension_chan_offset);
}

static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
{
	u16 new_val;
	u16 beacon_factor;

	/*
	 * If mac80211 hasn't given us a beacon interval, program
	 * the default into the device (not checking this here
	 * would cause the adjustment below to return the maximum
	 * value, which may break PAN.)
	 */
	if (!beacon_val)
		return DEFAULT_BEACON_INTERVAL;

	/*
	 * If the beacon interval we obtained from the peer
	 * is too large, we'll have to wake up more often
	 * (and in IBSS case, we'll beacon too much)
	 *
	 * For example, if max_beacon_val is 4096, and the
	 * requested beacon interval is 7000, we'll have to
	 * use 3500 to be able to wake up on the beacons.
	 *
	 * This could badly influence beacon detection stats.
	 */

	beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
	new_val = beacon_val / beacon_factor;

	if (!new_val)
		new_val = max_beacon_val;

	return new_val;
}

int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	u64 tsf;
	s32 interval_tm, rem;
	struct ieee80211_conf *conf = NULL;
	u16 beacon_int;
	struct ieee80211_vif *vif = ctx->vif;

	conf = &priv->hw->conf;

	lockdep_assert_held(&priv->mutex);

	memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));

	ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
	ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);

	beacon_int = vif ? vif->bss_conf.beacon_int : 0;

	/*
	 * TODO: For IBSS we need to get atim_window from mac80211,
	 *	 for now just always use 0
	 */
	ctx->timing.atim_window = 0;

	if (ctx->ctxid == IWL_RXON_CTX_PAN &&
	    (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
	    iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
	    priv->contexts[IWL_RXON_CTX_BSS].vif &&
	    priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
		ctx->timing.beacon_interval =
			priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
		beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
	} else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
		   iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
		   priv->contexts[IWL_RXON_CTX_PAN].vif &&
		   priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
		   (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
		    !ctx->vif->bss_conf.beacon_int)) {
		ctx->timing.beacon_interval =
			priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
		beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
	} else {
		beacon_int = iwl_adjust_beacon_interval(beacon_int,
			IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
		ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
	}

	ctx->beacon_int = beacon_int;

	tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
	interval_tm = beacon_int * TIME_UNIT;
	rem = do_div(tsf, interval_tm);
	ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);

	ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;

	IWL_DEBUG_ASSOC(priv,
			"beacon interval %d beacon timer %d beacon tim %d\n",
			le16_to_cpu(ctx->timing.beacon_interval),
			le32_to_cpu(ctx->timing.beacon_init_val),
			le16_to_cpu(ctx->timing.atim_window));

	return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
				CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
}

void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
			   int hw_decrypt)
{
	struct iwl_rxon_cmd *rxon = &ctx->staging;

	if (hw_decrypt)
		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
	else
		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;

}

/* validate RXON structure is valid */
int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	struct iwl_rxon_cmd *rxon = &ctx->staging;
	u32 errors = 0;

	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
		if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
			IWL_WARN(priv, "check 2.4G: wrong narrow\n");
			errors |= BIT(0);
		}
		if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
			IWL_WARN(priv, "check 2.4G: wrong radar\n");
			errors |= BIT(1);
		}
	} else {
		if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
			IWL_WARN(priv, "check 5.2G: not short slot!\n");
			errors |= BIT(2);
		}
		if (rxon->flags & RXON_FLG_CCK_MSK) {
			IWL_WARN(priv, "check 5.2G: CCK!\n");
			errors |= BIT(3);
		}
	}
	if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
		IWL_WARN(priv, "mac/bssid mcast!\n");
		errors |= BIT(4);
	}

	/* make sure basic rates 6Mbps and 1Mbps are supported */
	if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
	    (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
		IWL_WARN(priv, "neither 1 nor 6 are basic\n");
		errors |= BIT(5);
	}

	if (le16_to_cpu(rxon->assoc_id) > 2007) {
		IWL_WARN(priv, "aid > 2007\n");
		errors |= BIT(6);
	}

	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
		IWL_WARN(priv, "CCK and short slot\n");
		errors |= BIT(7);
	}

	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
			== (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
		IWL_WARN(priv, "CCK and auto detect");
		errors |= BIT(8);
	}

	if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
			    RXON_FLG_TGG_PROTECT_MSK)) ==
			    RXON_FLG_TGG_PROTECT_MSK) {
		IWL_WARN(priv, "TGg but no auto-detect\n");
		errors |= BIT(9);
	}

	if (rxon->channel == 0) {
		IWL_WARN(priv, "zero channel is invalid\n");
		errors |= BIT(10);
	}

	WARN(errors, "Invalid RXON (%#x), channel %d",
	     errors, le16_to_cpu(rxon->channel));

	return errors ? -EINVAL : 0;
}

/**
 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 * @priv: staging_rxon is compared to active_rxon
 *
 * If the RXON structure is changing enough to require a new tune,
 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 */
int iwl_full_rxon_required(struct iwl_priv *priv,
			   struct iwl_rxon_context *ctx)
{
	const struct iwl_rxon_cmd *staging = &ctx->staging;
	const struct iwl_rxon_cmd *active = &ctx->active;

#define CHK(cond)							\
	if ((cond)) {							\
		IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");	\
		return 1;						\
	}

#define CHK_NEQ(c1, c2)						\
	if ((c1) != (c2)) {					\
		IWL_DEBUG_INFO(priv, "need full RXON - "	\
			       #c1 " != " #c2 " - %d != %d\n",	\
			       (c1), (c2));			\
		return 1;					\
	}

	/* These items are only settable from the full RXON command */
	CHK(!iwl_is_associated_ctx(ctx));
	CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
	CHK(compare_ether_addr(staging->node_addr, active->node_addr));
	CHK(compare_ether_addr(staging->wlap_bssid_addr,
				active->wlap_bssid_addr));
	CHK_NEQ(staging->dev_type, active->dev_type);
	CHK_NEQ(staging->channel, active->channel);
	CHK_NEQ(staging->air_propagation, active->air_propagation);
	CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
		active->ofdm_ht_single_stream_basic_rates);
	CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
		active->ofdm_ht_dual_stream_basic_rates);
	CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
		active->ofdm_ht_triple_stream_basic_rates);
	CHK_NEQ(staging->assoc_id, active->assoc_id);

	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
	 * be updated with the RXON_ASSOC command -- however only some
	 * flag transitions are allowed using RXON_ASSOC */

	/* Check if we are not switching bands */
	CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
		active->flags & RXON_FLG_BAND_24G_MSK);

	/* Check if we are switching association toggle */
	CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
		active->filter_flags & RXON_FILTER_ASSOC_MSK);

#undef CHK
#undef CHK_NEQ

	return 0;
}

static void _iwl_set_rxon_ht(struct iwl_priv *priv,
			     struct iwl_ht_config *ht_conf,
			     struct iwl_rxon_context *ctx)
{
	struct iwl_rxon_cmd *rxon = &ctx->staging;

	if (!ctx->ht.enabled) {
		rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
			RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
			RXON_FLG_HT40_PROT_MSK |
			RXON_FLG_HT_PROT_MSK);
		return;
	}

	/* FIXME: if the definition of ht.protection changed, the "translation"
	 * will be needed for rxon->flags
	 */
	rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);

	/* Set up channel bandwidth:
	 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
	/* clear the HT channel mode before set the mode */
	rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
			 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
	if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
		/* pure ht40 */
		if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
			rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
			/* Note: control channel is opposite of extension channel */
			switch (ctx->ht.extension_chan_offset) {
			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
				rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				break;
			}
		} else {
			/* Note: control channel is opposite of extension channel */
			switch (ctx->ht.extension_chan_offset) {
			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
				rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
				break;
			case IEEE80211_HT_PARAM_CHA_SEC_NONE:
			default:
				/* channel location only valid if in Mixed mode */
				IWL_ERR(priv, "invalid extension channel offset\n");
				break;
			}
		}
	} else {
		rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
	}

	iwlagn_set_rxon_chain(priv, ctx);

	IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
			"extension channel offset 0x%x\n",
			le32_to_cpu(rxon->flags), ctx->ht.protection,
			ctx->ht.extension_chan_offset);
}

void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
{
	struct iwl_rxon_context *ctx;

	for_each_context(priv, ctx)
		_iwl_set_rxon_ht(priv, ht_conf, ctx);
}

/* Return valid, unused, channel for a passive scan to reset the RF */
u8 iwl_get_single_channel_number(struct iwl_priv *priv,
				 enum ieee80211_band band)
{
	const struct iwl_channel_info *ch_info;
	int i;
	u8 channel = 0;
	u8 min, max;
	struct iwl_rxon_context *ctx;

	if (band == IEEE80211_BAND_5GHZ) {
		min = 14;
		max = priv->channel_count;
	} else {
		min = 0;
		max = 14;
	}

	for (i = min; i < max; i++) {
		bool busy = false;

		for_each_context(priv, ctx) {
			busy = priv->channel_info[i].channel ==
				le16_to_cpu(ctx->staging.channel);
			if (busy)
				break;
		}

		if (busy)
			continue;

		channel = priv->channel_info[i].channel;
		ch_info = iwl_get_channel_info(priv, band, channel);
		if (is_channel_valid(ch_info))
			break;
	}

	return channel;
}

/**
 * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 * @ch: requested channel as a pointer to struct ieee80211_channel

 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 * in the staging RXON flag structure based on the ch->band
 */
void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
			 struct iwl_rxon_context *ctx)
{
	enum ieee80211_band band = ch->band;
	u16 channel = ch->hw_value;

	if ((le16_to_cpu(ctx->staging.channel) == channel) &&
	    (priv->band == band))
		return;

	ctx->staging.channel = cpu_to_le16(channel);
	if (band == IEEE80211_BAND_5GHZ)
		ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
	else
		ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;

	priv->band = band;

	IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);

}

void iwl_set_flags_for_band(struct iwl_priv *priv,
			    struct iwl_rxon_context *ctx,
			    enum ieee80211_band band,
			    struct ieee80211_vif *vif)
{
	if (band == IEEE80211_BAND_5GHZ) {
		ctx->staging.flags &=
		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
		      | RXON_FLG_CCK_MSK);
		ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
	} else {
		/* Copied from iwl_post_associate() */
		if (vif && vif->bss_conf.use_short_slot)
			ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
		else
			ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;

		ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
		ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
		ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
	}
}

/*
 * initialize rxon structure with default values from eeprom
 */
void iwl_connection_init_rx_config(struct iwl_priv *priv,
				   struct iwl_rxon_context *ctx)
{
	const struct iwl_channel_info *ch_info;

	memset(&ctx->staging, 0, sizeof(ctx->staging));

	if (!ctx->vif) {
		ctx->staging.dev_type = ctx->unused_devtype;
	} else switch (ctx->vif->type) {
	case NL80211_IFTYPE_AP:
		ctx->staging.dev_type = ctx->ap_devtype;
		break;

	case NL80211_IFTYPE_STATION:
		ctx->staging.dev_type = ctx->station_devtype;
		ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	case NL80211_IFTYPE_ADHOC:
		ctx->staging.dev_type = ctx->ibss_devtype;
		ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
		ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
						  RXON_FILTER_ACCEPT_GRP_MSK;
		break;

	default:
		IWL_ERR(priv, "Unsupported interface type %d\n",
			ctx->vif->type);
		break;
	}

#if 0
	/* TODO:  Figure out when short_preamble would be set and cache from
	 * that */
	if (!hw_to_local(priv->hw)->short_preamble)
		ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
	else
		ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
#endif

	ch_info = iwl_get_channel_info(priv, priv->band,
				       le16_to_cpu(ctx->active.channel));

	if (!ch_info)
		ch_info = &priv->channel_info[0];

	ctx->staging.channel = cpu_to_le16(ch_info->channel);
	priv->band = ch_info->band;

	iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);

	ctx->staging.ofdm_basic_rates =
	    (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	ctx->staging.cck_basic_rates =
	    (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

	/* clear both MIX and PURE40 mode flag */
	ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
					RXON_FLG_CHANNEL_MODE_PURE_40);
	if (ctx->vif)
		memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);

	ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
	ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
	ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
}

void iwl_set_rate(struct iwl_priv *priv)
{
	const struct ieee80211_supported_band *hw = NULL;
	struct ieee80211_rate *rate;
	struct iwl_rxon_context *ctx;
	int i;

	hw = iwl_get_hw_mode(priv, priv->band);
	if (!hw) {
		IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
		return;
	}

	priv->active_rate = 0;

	for (i = 0; i < hw->n_bitrates; i++) {
		rate = &(hw->bitrates[i]);
		if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
			priv->active_rate |= (1 << rate->hw_value);
	}

	IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);

	for_each_context(priv, ctx) {
		ctx->staging.cck_basic_rates =
		    (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;

		ctx->staging.ofdm_basic_rates =
		   (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
	}
}

void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
{
	/*
	 * MULTI-FIXME
	 * See iwlagn_mac_channel_switch.
	 */
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
		ieee80211_chswitch_done(ctx->vif, is_success);
}

#ifdef CONFIG_IWLWIFI_DEBUG
void iwl_print_rx_config_cmd(struct iwl_priv *priv,
			     enum iwl_rxon_context_id ctxid)
{
	struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
	struct iwl_rxon_cmd *rxon = &ctx->staging;

	IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
	iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
	IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
	IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
	IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
			le32_to_cpu(rxon->filter_flags));
	IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
	IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
			rxon->ofdm_basic_rates);
	IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
	IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
	IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
	IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
}
#endif

static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
{
	unsigned int reload_msec;
	unsigned long reload_jiffies;

#ifdef CONFIG_IWLWIFI_DEBUG
	if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
		iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
#endif

	/* uCode is no longer loaded. */
	priv->ucode_loaded = false;

	/* Set the FW error flag -- cleared on iwl_down */
	set_bit(STATUS_FW_ERROR, &priv->shrd->status);

	/* Cancel currently queued command. */
	clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);

	iwl_abort_notification_waits(&priv->notif_wait);

	/* Keep the restart process from trying to send host
	 * commands by clearing the ready bit */
	clear_bit(STATUS_READY, &priv->status);

	wake_up(&trans(priv)->wait_command_queue);

	if (!ondemand) {
		/*
		 * If firmware keep reloading, then it indicate something
		 * serious wrong and firmware having problem to recover
		 * from it. Instead of keep trying which will fill the syslog
		 * and hang the system, let's just stop it
		 */
		reload_jiffies = jiffies;
		reload_msec = jiffies_to_msecs((long) reload_jiffies -
					(long) priv->reload_jiffies);
		priv->reload_jiffies = reload_jiffies;
		if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
			priv->reload_count++;
			if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
				IWL_ERR(priv, "BUG_ON, Stop restarting\n");
				return;
			}
		} else
			priv->reload_count = 0;
	}

	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		if (iwlagn_mod_params.restart_fw) {
			IWL_DEBUG_FW_ERRORS(priv,
				  "Restarting adapter due to uCode error.\n");
			queue_work(priv->workqueue, &priv->restart);
		} else
			IWL_DEBUG_FW_ERRORS(priv,
				  "Detected FW error, but not restarting\n");
	}
}

int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
	int ret;
	s8 prev_tx_power;
	bool defer;
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];

	lockdep_assert_held(&priv->mutex);

	if (priv->tx_power_user_lmt == tx_power && !force)
		return 0;

	if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
		IWL_WARN(priv,
			 "Requested user TXPOWER %d below lower limit %d.\n",
			 tx_power,
			 IWLAGN_TX_POWER_TARGET_POWER_MIN);
		return -EINVAL;
	}

	if (tx_power > priv->tx_power_device_lmt) {
		IWL_WARN(priv,
			"Requested user TXPOWER %d above upper limit %d.\n",
			 tx_power, priv->tx_power_device_lmt);
		return -EINVAL;
	}

	if (!iwl_is_ready_rf(priv))
		return -EIO;

	/* scan complete and commit_rxon use tx_power_next value,
	 * it always need to be updated for newest request */
	priv->tx_power_next = tx_power;

	/* do not set tx power when scanning or channel changing */
	defer = test_bit(STATUS_SCANNING, &priv->status) ||
		memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
	if (defer && !force) {
		IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
		return 0;
	}

	prev_tx_power = priv->tx_power_user_lmt;
	priv->tx_power_user_lmt = tx_power;

	ret = iwlagn_send_tx_power(priv);

	/* if fail to set tx_power, restore the orig. tx power */
	if (ret) {
		priv->tx_power_user_lmt = prev_tx_power;
		priv->tx_power_next = prev_tx_power;
	}
	return ret;
}

void iwl_send_bt_config(struct iwl_priv *priv)
{
	struct iwl_bt_cmd bt_cmd = {
		.lead_time = BT_LEAD_TIME_DEF,
		.max_kill = BT_MAX_KILL_DEF,
		.kill_ack_mask = 0,
		.kill_cts_mask = 0,
	};

	if (!iwlagn_mod_params.bt_coex_active)
		bt_cmd.flags = BT_COEX_DISABLE;
	else
		bt_cmd.flags = BT_COEX_ENABLE;

	priv->bt_enable_flag = bt_cmd.flags;
	IWL_DEBUG_INFO(priv, "BT coex %s\n",
		(bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");

	if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
			     CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
		IWL_ERR(priv, "failed to send BT Coex Config\n");
}

int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
{
	struct iwl_statistics_cmd statistics_cmd = {
		.configuration_flags =
			clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
	};

	if (flags & CMD_ASYNC)
		return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
					      CMD_ASYNC,
					       sizeof(struct iwl_statistics_cmd),
					       &statistics_cmd);
	else
		return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
					CMD_SYNC,
					sizeof(struct iwl_statistics_cmd),
					&statistics_cmd);
}




#ifdef CONFIG_IWLWIFI_DEBUGFS

#define IWL_TRAFFIC_DUMP_SIZE	(IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)

void iwl_reset_traffic_log(struct iwl_priv *priv)
{
	priv->tx_traffic_idx = 0;
	priv->rx_traffic_idx = 0;
	if (priv->tx_traffic)
		memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
	if (priv->rx_traffic)
		memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
}

int iwl_alloc_traffic_mem(struct iwl_priv *priv)
{
	u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;

	if (iwl_have_debug_level(IWL_DL_TX)) {
		if (!priv->tx_traffic) {
			priv->tx_traffic =
				kzalloc(traffic_size, GFP_KERNEL);
			if (!priv->tx_traffic)
				return -ENOMEM;
		}
	}
	if (iwl_have_debug_level(IWL_DL_RX)) {
		if (!priv->rx_traffic) {
			priv->rx_traffic =
				kzalloc(traffic_size, GFP_KERNEL);
			if (!priv->rx_traffic)
				return -ENOMEM;
		}
	}
	iwl_reset_traffic_log(priv);
	return 0;
}

void iwl_free_traffic_mem(struct iwl_priv *priv)
{
	kfree(priv->tx_traffic);
	priv->tx_traffic = NULL;

	kfree(priv->rx_traffic);
	priv->rx_traffic = NULL;
}

void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
		      u16 length, struct ieee80211_hdr *header)
{
	__le16 fc;
	u16 len;

	if (likely(!iwl_have_debug_level(IWL_DL_TX)))
		return;

	if (!priv->tx_traffic)
		return;

	fc = header->frame_control;
	if (ieee80211_is_data(fc)) {
		len = (length > IWL_TRAFFIC_ENTRY_SIZE)
		       ? IWL_TRAFFIC_ENTRY_SIZE : length;
		memcpy((priv->tx_traffic +
		       (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
		       header, len);
		priv->tx_traffic_idx =
			(priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
	}
}

void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
		      u16 length, struct ieee80211_hdr *header)
{
	__le16 fc;
	u16 len;

	if (likely(!iwl_have_debug_level(IWL_DL_RX)))
		return;

	if (!priv->rx_traffic)
		return;

	fc = header->frame_control;
	if (ieee80211_is_data(fc)) {
		len = (length > IWL_TRAFFIC_ENTRY_SIZE)
		       ? IWL_TRAFFIC_ENTRY_SIZE : length;
		memcpy((priv->rx_traffic +
		       (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
		       header, len);
		priv->rx_traffic_idx =
			(priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
	}
}

const char *get_mgmt_string(int cmd)
{
	switch (cmd) {
		IWL_CMD(MANAGEMENT_ASSOC_REQ);
		IWL_CMD(MANAGEMENT_ASSOC_RESP);
		IWL_CMD(MANAGEMENT_REASSOC_REQ);
		IWL_CMD(MANAGEMENT_REASSOC_RESP);
		IWL_CMD(MANAGEMENT_PROBE_REQ);
		IWL_CMD(MANAGEMENT_PROBE_RESP);
		IWL_CMD(MANAGEMENT_BEACON);
		IWL_CMD(MANAGEMENT_ATIM);
		IWL_CMD(MANAGEMENT_DISASSOC);
		IWL_CMD(MANAGEMENT_AUTH);
		IWL_CMD(MANAGEMENT_DEAUTH);
		IWL_CMD(MANAGEMENT_ACTION);
	default:
		return "UNKNOWN";

	}
}

const char *get_ctrl_string(int cmd)
{
	switch (cmd) {
		IWL_CMD(CONTROL_BACK_REQ);
		IWL_CMD(CONTROL_BACK);
		IWL_CMD(CONTROL_PSPOLL);
		IWL_CMD(CONTROL_RTS);
		IWL_CMD(CONTROL_CTS);
		IWL_CMD(CONTROL_ACK);
		IWL_CMD(CONTROL_CFEND);
		IWL_CMD(CONTROL_CFENDACK);
	default:
		return "UNKNOWN";

	}
}

void iwl_clear_traffic_stats(struct iwl_priv *priv)
{
	memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
	memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
}

/*
 * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
 * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
 * Use debugFs to display the rx/rx_statistics
 * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
 * information will be recorded, but DATA pkt still will be recorded
 * for the reason of iwl_led.c need to control the led blinking based on
 * number of tx and rx data.
 *
 */
void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
{
	struct traffic_stats	*stats;

	if (is_tx)
		stats = &priv->tx_stats;
	else
		stats = &priv->rx_stats;

	if (ieee80211_is_mgmt(fc)) {
		switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
		case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
			stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
			stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
			stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
			stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
			stats->mgmt[MANAGEMENT_PROBE_REQ]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
			stats->mgmt[MANAGEMENT_PROBE_RESP]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_BEACON):
			stats->mgmt[MANAGEMENT_BEACON]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_ATIM):
			stats->mgmt[MANAGEMENT_ATIM]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
			stats->mgmt[MANAGEMENT_DISASSOC]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_AUTH):
			stats->mgmt[MANAGEMENT_AUTH]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
			stats->mgmt[MANAGEMENT_DEAUTH]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_ACTION):
			stats->mgmt[MANAGEMENT_ACTION]++;
			break;
		}
	} else if (ieee80211_is_ctl(fc)) {
		switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
		case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
			stats->ctrl[CONTROL_BACK_REQ]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_BACK):
			stats->ctrl[CONTROL_BACK]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
			stats->ctrl[CONTROL_PSPOLL]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_RTS):
			stats->ctrl[CONTROL_RTS]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_CTS):
			stats->ctrl[CONTROL_CTS]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_ACK):
			stats->ctrl[CONTROL_ACK]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_CFEND):
			stats->ctrl[CONTROL_CFEND]++;
			break;
		case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
			stats->ctrl[CONTROL_CFENDACK]++;
			break;
		}
	} else {
		/* data */
		stats->data_cnt++;
		stats->data_bytes += len;
	}
}
#endif

static void iwl_force_rf_reset(struct iwl_priv *priv)
{
	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	if (!iwl_is_any_associated(priv)) {
		IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
		return;
	}
	/*
	 * There is no easy and better way to force reset the radio,
	 * the only known method is switching channel which will force to
	 * reset and tune the radio.
	 * Use internal short scan (single channel) operation to should
	 * achieve this objective.
	 * Driver should reset the radio when number of consecutive missed
	 * beacon, or any other uCode error condition detected.
	 */
	IWL_DEBUG_INFO(priv, "perform radio reset.\n");
	iwl_internal_short_hw_scan(priv);
}


int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
{
	struct iwl_force_reset *force_reset;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return -EINVAL;

	if (mode >= IWL_MAX_FORCE_RESET) {
		IWL_DEBUG_INFO(priv, "invalid reset request.\n");
		return -EINVAL;
	}
	force_reset = &priv->force_reset[mode];
	force_reset->reset_request_count++;
	if (!external) {
		if (force_reset->last_force_reset_jiffies &&
		    time_after(force_reset->last_force_reset_jiffies +
		    force_reset->reset_duration, jiffies)) {
			IWL_DEBUG_INFO(priv, "force reset rejected\n");
			force_reset->reset_reject_count++;
			return -EAGAIN;
		}
	}
	force_reset->reset_success_count++;
	force_reset->last_force_reset_jiffies = jiffies;
	IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
	switch (mode) {
	case IWL_RF_RESET:
		iwl_force_rf_reset(priv);
		break;
	case IWL_FW_RESET:
		/*
		 * if the request is from external(ex: debugfs),
		 * then always perform the request in regardless the module
		 * parameter setting
		 * if the request is from internal (uCode error or driver
		 * detect failure), then fw_restart module parameter
		 * need to be check before performing firmware reload
		 */
		if (!external && !iwlagn_mod_params.restart_fw) {
			IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
				       "module parameter setting\n");
			break;
		}
		IWL_ERR(priv, "On demand firmware reload\n");
		iwlagn_fw_error(priv, true);
		break;
	}
	return 0;
}


int iwl_cmd_echo_test(struct iwl_priv *priv)
{
	int ret;
	struct iwl_host_cmd cmd = {
		.id = REPLY_ECHO,
		.len = { 0 },
		.flags = CMD_SYNC,
	};

	ret = iwl_dvm_send_cmd(priv, &cmd);
	if (ret)
		IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
	else
		IWL_DEBUG_INFO(priv, "echo testing pass\n");
	return ret;
}

static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
{
	if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
		int ret;
		ret = iwl_force_reset(priv, IWL_FW_RESET, false);
		return (ret == -EAGAIN) ? 0 : 1;
	}
	return 0;
}

/*
 * Making watchdog tick be a quarter of timeout assure we will
 * discover the queue hung between timeout and 1.25*timeout
 */
#define IWL_WD_TICK(timeout) ((timeout) / 4)

/*
 * Watchdog timer callback, we check each tx queue for stuck, if if hung
 * we reset the firmware. If everything is fine just rearm the timer.
 */
void iwl_bg_watchdog(unsigned long data)
{
	struct iwl_priv *priv = (struct iwl_priv *)data;
	int cnt;
	unsigned long timeout;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
		return;

	if (iwl_is_rfkill(priv))
		return;

	timeout = hw_params(priv).wd_timeout;
	if (timeout == 0)
		return;

	/* monitor and check for stuck queues */
	for (cnt = 0; cnt < cfg(priv)->base_params->num_of_queues; cnt++)
		if (iwl_check_stuck_queue(priv, cnt))
			return;

	mod_timer(&priv->watchdog, jiffies +
		  msecs_to_jiffies(IWL_WD_TICK(timeout)));
}

void iwl_setup_watchdog(struct iwl_priv *priv)
{
	unsigned int timeout = hw_params(priv).wd_timeout;

	if (!iwlagn_mod_params.wd_disable) {
		/* use system default */
		if (timeout && !cfg(priv)->base_params->wd_disable)
			mod_timer(&priv->watchdog,
				jiffies +
				msecs_to_jiffies(IWL_WD_TICK(timeout)));
		else
			del_timer(&priv->watchdog);
	} else {
		/* module parameter overwrite default configuration */
		if (timeout && iwlagn_mod_params.wd_disable == 2)
			mod_timer(&priv->watchdog,
				jiffies +
				msecs_to_jiffies(IWL_WD_TICK(timeout)));
		else
			del_timer(&priv->watchdog);
	}
}

/**
 * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
 * @priv -- pointer to iwl_priv data structure
 * @tsf_bits -- number of bits need to shift for masking)
 */
static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
					   u16 tsf_bits)
{
	return (1 << tsf_bits) - 1;
}

/**
 * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
 * @priv -- pointer to iwl_priv data structure
 * @tsf_bits -- number of bits need to shift for masking)
 */
static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
					    u16 tsf_bits)
{
	return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
}

/*
 * extended beacon time format
 * time in usec will be changed into a 32-bit value in extended:internal format
 * the extended part is the beacon counts
 * the internal part is the time in usec within one beacon interval
 */
u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
{
	u32 quot;
	u32 rem;
	u32 interval = beacon_interval * TIME_UNIT;

	if (!interval || !usec)
		return 0;

	quot = (usec / interval) &
		(iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
		IWLAGN_EXT_BEACON_TIME_POS);
	rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
				   IWLAGN_EXT_BEACON_TIME_POS);

	return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
}

/* base is usually what we get from ucode with each received frame,
 * the same as HW timer counter counting down
 */
__le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
			   u32 addon, u32 beacon_interval)
{
	u32 base_low = base & iwl_beacon_time_mask_low(priv,
				IWLAGN_EXT_BEACON_TIME_POS);
	u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
				IWLAGN_EXT_BEACON_TIME_POS);
	u32 interval = beacon_interval * TIME_UNIT;
	u32 res = (base & iwl_beacon_time_mask_high(priv,
				IWLAGN_EXT_BEACON_TIME_POS)) +
				(addon & iwl_beacon_time_mask_high(priv,
				IWLAGN_EXT_BEACON_TIME_POS));

	if (base_low > addon_low)
		res += base_low - addon_low;
	else if (base_low < addon_low) {
		res += interval + base_low - addon_low;
		res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
	} else
		res += (1 << IWLAGN_EXT_BEACON_TIME_POS);

	return cpu_to_le32(res);
}

void iwl_nic_error(struct iwl_op_mode *op_mode)
{
	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

	iwlagn_fw_error(priv, false);
}

void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
{
	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);

	if (state)
		set_bit(STATUS_RF_KILL_HW, &priv->status);
	else
		clear_bit(STATUS_RF_KILL_HW, &priv->status);

	wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
}

void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
{
	struct ieee80211_tx_info *info;

	info = IEEE80211_SKB_CB(skb);
	kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
	dev_kfree_skb_any(skb);
}