summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
blob: 1799469268ea8e8a24d8d3fd33b0221b92ccfcd3 (plain)
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
/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2008 - 2014 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 COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <net/mac80211.h>

#include "iwl-io.h"
#include "iwl-agn-hw.h"
#include "iwl-trans.h"
#include "iwl-modparams.h"

#include "dev.h"
#include "agn.h"

int iwlagn_hw_valid_rtc_data_addr(u32 addr)
{
	return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
		(addr < IWLAGN_RTC_DATA_UPPER_BOUND);
}

int iwlagn_send_tx_power(struct iwl_priv *priv)
{
	struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
	u8 tx_ant_cfg_cmd;

	if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
		      "TX Power requested while scanning!\n"))
		return -EAGAIN;

	/* half dBm need to multiply */
	tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);

	if (tx_power_cmd.global_lmt > priv->nvm_data->max_tx_pwr_half_dbm) {
		/*
		 * For the newer devices which using enhanced/extend tx power
		 * table in EEPROM, the format is in half dBm. driver need to
		 * convert to dBm format before report to mac80211.
		 * By doing so, there is a possibility of 1/2 dBm resolution
		 * lost. driver will perform "round-up" operation before
		 * reporting, but it will cause 1/2 dBm tx power over the
		 * regulatory limit. Perform the checking here, if the
		 * "tx_power_user_lmt" is higher than EEPROM value (in
		 * half-dBm format), lower the tx power based on EEPROM
		 */
		tx_power_cmd.global_lmt =
			priv->nvm_data->max_tx_pwr_half_dbm;
	}
	tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
	tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;

	if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
	else
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;

	return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, 0,
			sizeof(tx_power_cmd), &tx_power_cmd);
}

void iwlagn_temperature(struct iwl_priv *priv)
{
	lockdep_assert_held(&priv->statistics.lock);

	/* store temperature from correct statistics (in Celsius) */
	priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
	iwl_tt_handler(priv);
}

int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
	int idx = 0;
	int band_offset = 0;

	/* HT rate format: mac80211 wants an MCS number, which is just LSB */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);
		return idx;
	/* Legacy rate format, search for match in table */
	} else {
		if (band == IEEE80211_BAND_5GHZ)
			band_offset = IWL_FIRST_OFDM_RATE;
		for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx - band_offset;
	}

	return -1;
}

int iwlagn_manage_ibss_station(struct iwl_priv *priv,
			       struct ieee80211_vif *vif, bool add)
{
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;

	if (add)
		return iwlagn_add_bssid_station(priv, vif_priv->ctx,
						vif->bss_conf.bssid,
						&vif_priv->ibss_bssid_sta_id);
	return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
				  vif->bss_conf.bssid);
}

/**
 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
 *
 * pre-requirements:
 *  1. acquire mutex before calling
 *  2. make sure rf is on and not in exit state
 */
int iwlagn_txfifo_flush(struct iwl_priv *priv, u32 scd_q_msk)
{
	struct iwl_txfifo_flush_cmd_v3 flush_cmd_v3 = {
		.flush_control = cpu_to_le16(IWL_DROP_ALL),
	};
	struct iwl_txfifo_flush_cmd_v2 flush_cmd_v2 = {
		.flush_control = cpu_to_le16(IWL_DROP_ALL),
	};

	u32 queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
			    IWL_SCD_BE_MSK | IWL_SCD_BK_MSK | IWL_SCD_MGMT_MSK;

	if ((priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
		queue_control |= IWL_PAN_SCD_VO_MSK | IWL_PAN_SCD_VI_MSK |
				 IWL_PAN_SCD_BE_MSK | IWL_PAN_SCD_BK_MSK |
				 IWL_PAN_SCD_MGMT_MSK |
				 IWL_PAN_SCD_MULTICAST_MSK;

	if (priv->nvm_data->sku_cap_11n_enable)
		queue_control |= IWL_AGG_TX_QUEUE_MSK;

	if (scd_q_msk)
		queue_control = scd_q_msk;

	IWL_DEBUG_INFO(priv, "queue control: 0x%x\n", queue_control);
	flush_cmd_v3.queue_control = cpu_to_le32(queue_control);
	flush_cmd_v2.queue_control = cpu_to_le16((u16)queue_control);

	if (IWL_UCODE_API(priv->fw->ucode_ver) > 2)
		return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
					    sizeof(flush_cmd_v3),
					    &flush_cmd_v3);
	return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
				    sizeof(flush_cmd_v2), &flush_cmd_v2);
}

void iwlagn_dev_txfifo_flush(struct iwl_priv *priv)
{
	mutex_lock(&priv->mutex);
	ieee80211_stop_queues(priv->hw);
	if (iwlagn_txfifo_flush(priv, 0)) {
		IWL_ERR(priv, "flush request fail\n");
		goto done;
	}
	IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
	iwl_trans_wait_tx_queue_empty(priv->trans, 0xffffffff);
done:
	ieee80211_wake_queues(priv->hw);
	mutex_unlock(&priv->mutex);
}

/*
 * BT coex
 */
/* Notmal TDM */
static const __le32 iwlagn_def_3w_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaeaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xc0004000),
	cpu_to_le32(0x00004000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};


/* Loose Coex */
static const __le32 iwlagn_loose_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaeaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};

/* Full concurrency */
static const __le32 iwlagn_concurrent_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
};

void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
{
	struct iwl_basic_bt_cmd basic = {
		.max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
		.bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
		.bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
		.bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
	};
	struct iwl_bt_cmd_v1 bt_cmd_v1;
	struct iwl_bt_cmd_v2 bt_cmd_v2;
	int ret;

	BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
			sizeof(basic.bt3_lookup_table));

	if (priv->lib->bt_params) {
		/*
		 * newer generation of devices (2000 series and newer)
		 * use the version 2 of the bt command
		 * we need to make sure sending the host command
		 * with correct data structure to avoid uCode assert
		 */
		if (priv->lib->bt_params->bt_session_2) {
			bt_cmd_v2.prio_boost = cpu_to_le32(
				priv->lib->bt_params->bt_prio_boost);
			bt_cmd_v2.tx_prio_boost = 0;
			bt_cmd_v2.rx_prio_boost = 0;
		} else {
			/* older version only has 8 bits */
			WARN_ON(priv->lib->bt_params->bt_prio_boost & ~0xFF);
			bt_cmd_v1.prio_boost =
				priv->lib->bt_params->bt_prio_boost;
			bt_cmd_v1.tx_prio_boost = 0;
			bt_cmd_v1.rx_prio_boost = 0;
		}
	} else {
		IWL_ERR(priv, "failed to construct BT Coex Config\n");
		return;
	}

	/*
	 * Possible situations when BT needs to take over for receive,
	 * at the same time where STA needs to response to AP's frame(s),
	 * reduce the tx power of the required response frames, by that,
	 * allow the concurrent BT receive & WiFi transmit
	 * (BT - ANT A, WiFi -ANT B), without interference to one another
	 *
	 * Reduced tx power apply to control frames only (ACK/Back/CTS)
	 * when indicated by the BT config command
	 */
	basic.kill_ack_mask = priv->kill_ack_mask;
	basic.kill_cts_mask = priv->kill_cts_mask;
	if (priv->reduced_txpower)
		basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR;
	basic.valid = priv->bt_valid;

	/*
	 * Configure BT coex mode to "no coexistence" when the
	 * user disabled BT coexistence, we have no interface
	 * (might be in monitor mode), or the interface is in
	 * IBSS mode (no proper uCode support for coex then).
	 */
	if (!iwlwifi_mod_params.bt_coex_active ||
	    priv->iw_mode == NL80211_IFTYPE_ADHOC) {
		basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
	} else {
		basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
					IWLAGN_BT_FLAG_COEX_MODE_SHIFT;

		if (!priv->bt_enable_pspoll)
			basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
		else
			basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;

		if (priv->bt_ch_announce)
			basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
		IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
	}
	priv->bt_enable_flag = basic.flags;
	if (priv->bt_full_concurrent)
		memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
			sizeof(iwlagn_concurrent_lookup));
	else
		memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
			sizeof(iwlagn_def_3w_lookup));

	IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
		       basic.flags ? "active" : "disabled",
		       priv->bt_full_concurrent ?
		       "full concurrency" : "3-wire");

	if (priv->lib->bt_params->bt_session_2) {
		memcpy(&bt_cmd_v2.basic, &basic,
			sizeof(basic));
		ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
			0, sizeof(bt_cmd_v2), &bt_cmd_v2);
	} else {
		memcpy(&bt_cmd_v1.basic, &basic,
			sizeof(basic));
		ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
			0, sizeof(bt_cmd_v1), &bt_cmd_v1);
	}
	if (ret)
		IWL_ERR(priv, "failed to send BT Coex Config\n");

}

void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
{
	struct iwl_rxon_context *ctx, *found_ctx = NULL;
	bool found_ap = false;

	lockdep_assert_held(&priv->mutex);

	/* Check whether AP or GO mode is active. */
	if (rssi_ena) {
		for_each_context(priv, ctx) {
			if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
			    iwl_is_associated_ctx(ctx)) {
				found_ap = true;
				break;
			}
		}
	}

	/*
	 * If disable was received or If GO/AP mode, disable RSSI
	 * measurements.
	 */
	if (!rssi_ena || found_ap) {
		if (priv->cur_rssi_ctx) {
			ctx = priv->cur_rssi_ctx;
			ieee80211_disable_rssi_reports(ctx->vif);
			priv->cur_rssi_ctx = NULL;
		}
		return;
	}

	/*
	 * If rssi measurements need to be enabled, consider all cases now.
	 * Figure out how many contexts are active.
	 */
	for_each_context(priv, ctx) {
		if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
		    iwl_is_associated_ctx(ctx)) {
			found_ctx = ctx;
			break;
		}
	}

	/*
	 * rssi monitor already enabled for the correct interface...nothing
	 * to do.
	 */
	if (found_ctx == priv->cur_rssi_ctx)
		return;

	/*
	 * Figure out if rssi monitor is currently enabled, and needs
	 * to be changed. If rssi monitor is already enabled, disable
	 * it first else just enable rssi measurements on the
	 * interface found above.
	 */
	if (priv->cur_rssi_ctx) {
		ctx = priv->cur_rssi_ctx;
		if (ctx->vif)
			ieee80211_disable_rssi_reports(ctx->vif);
	}

	priv->cur_rssi_ctx = found_ctx;

	if (!found_ctx)
		return;

	ieee80211_enable_rssi_reports(found_ctx->vif,
			IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
			IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
}

static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
{
	return (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
		BT_UART_MSG_FRAME3SCOESCO_POS;
}

static void iwlagn_bt_traffic_change_work(struct work_struct *work)
{
	struct iwl_priv *priv =
		container_of(work, struct iwl_priv, bt_traffic_change_work);
	struct iwl_rxon_context *ctx;
	int smps_request = -1;

	if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
		/* bt coex disabled */
		return;
	}

	/*
	 * Note: bt_traffic_load can be overridden by scan complete and
	 * coex profile notifications. Ignore that since only bad consequence
	 * can be not matching debug print with actual state.
	 */
	IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
		       priv->bt_traffic_load);

	switch (priv->bt_traffic_load) {
	case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
		if (priv->bt_status)
			smps_request = IEEE80211_SMPS_DYNAMIC;
		else
			smps_request = IEEE80211_SMPS_AUTOMATIC;
		break;
	case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
		smps_request = IEEE80211_SMPS_DYNAMIC;
		break;
	case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
	case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
		smps_request = IEEE80211_SMPS_STATIC;
		break;
	default:
		IWL_ERR(priv, "Invalid BT traffic load: %d\n",
			priv->bt_traffic_load);
		break;
	}

	mutex_lock(&priv->mutex);

	/*
	 * We can not send command to firmware while scanning. When the scan
	 * complete we will schedule this work again. We do check with mutex
	 * locked to prevent new scan request to arrive. We do not check
	 * STATUS_SCANNING to avoid race when queue_work two times from
	 * different notifications, but quit and not perform any work at all.
	 */
	if (test_bit(STATUS_SCAN_HW, &priv->status))
		goto out;

	iwl_update_chain_flags(priv);

	if (smps_request != -1) {
		priv->current_ht_config.smps = smps_request;
		for_each_context(priv, ctx) {
			if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
				ieee80211_request_smps(ctx->vif, smps_request);
		}
	}

	/*
	 * Dynamic PS poll related functionality. Adjust RSSI measurements if
	 * necessary.
	 */
	iwlagn_bt_coex_rssi_monitor(priv);
out:
	mutex_unlock(&priv->mutex);
}

/*
 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
 * correct interface or disable it if this is the last interface to be
 * removed.
 */
void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
{
	if (priv->bt_is_sco &&
	    priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
		iwlagn_bt_adjust_rssi_monitor(priv, true);
	else
		iwlagn_bt_adjust_rssi_monitor(priv, false);
}

static void iwlagn_print_uartmsg(struct iwl_priv *priv,
				struct iwl_bt_uart_msg *uart_msg)
{
	IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
			"Update Req = 0x%X\n",
		(BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
			BT_UART_MSG_FRAME1MSGTYPE_POS,
		(BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
			BT_UART_MSG_FRAME1SSN_POS,
		(BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
			BT_UART_MSG_FRAME1UPDATEREQ_POS);

	IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
			"Chl_SeqN = 0x%X, In band = 0x%X\n",
		(BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
			BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
		(BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
			BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
		(BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
			BT_UART_MSG_FRAME2CHLSEQN_POS,
		(BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
			BT_UART_MSG_FRAME2INBAND_POS);

	IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
			"ACL = 0x%X, Master = 0x%X, OBEX = 0x%X\n",
		(BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3SCOESCO_POS,
		(BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3SNIFF_POS,
		(BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3A2DP_POS,
		(BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3ACL_POS,
		(BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3MASTER_POS,
		(BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
			BT_UART_MSG_FRAME3OBEX_POS);

	IWL_DEBUG_COEX(priv, "Idle duration = 0x%X\n",
		(BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
			BT_UART_MSG_FRAME4IDLEDURATION_POS);

	IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
			"eSCO Retransmissions = 0x%X\n",
		(BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
			BT_UART_MSG_FRAME5TXACTIVITY_POS,
		(BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
			BT_UART_MSG_FRAME5RXACTIVITY_POS,
		(BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
			BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);

	IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X\n",
		(BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
			BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
		(BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
			BT_UART_MSG_FRAME6DISCOVERABLE_POS);

	IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
			"0x%X, Inquiry = 0x%X, Connectable = 0x%X\n",
		(BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
			BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
		(BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
			BT_UART_MSG_FRAME7PAGE_POS,
		(BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
			BT_UART_MSG_FRAME7INQUIRY_POS,
		(BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
			BT_UART_MSG_FRAME7CONNECTABLE_POS);
}

static bool iwlagn_set_kill_msk(struct iwl_priv *priv,
				struct iwl_bt_uart_msg *uart_msg)
{
	bool need_update = false;
	u8 kill_msk = IWL_BT_KILL_REDUCE;
	static const __le32 bt_kill_ack_msg[3] = {
		IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
		IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
		IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
	static const __le32 bt_kill_cts_msg[3] = {
		IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
		IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
		IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};

	if (!priv->reduced_txpower)
		kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
			? IWL_BT_KILL_OVERRIDE : IWL_BT_KILL_DEFAULT;
	if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
	    priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
		priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
		priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
		priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
		priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
		need_update = true;
	}
	return need_update;
}

/*
 * Upon RSSI changes, sends a bt config command with following changes
 *  1. enable/disable "reduced control frames tx power
 *  2. update the "kill)ack_mask" and "kill_cts_mask"
 *
 * If "reduced tx power" is enabled, uCode shall
 *  1. ACK/Back/CTS rate shall reduced to 6Mbps
 *  2. not use duplciate 20/40MHz mode
 */
static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
				struct iwl_bt_uart_msg *uart_msg)
{
	bool need_update = false;
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	int ave_rssi;

	if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
		IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
		return false;
	}

	ave_rssi = ieee80211_ave_rssi(ctx->vif);
	if (!ave_rssi) {
		/* no rssi data, no changes to reduce tx power */
		IWL_DEBUG_COEX(priv, "no rssi data available\n");
		return need_update;
	}
	if (!priv->reduced_txpower &&
	    !iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
	    (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) &&
	    (uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
	    BT_UART_MSG_FRAME3OBEX_MSK)) &&
	    !(uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
	    BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK))) {
		/* enabling reduced tx power */
		priv->reduced_txpower = true;
		priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
		need_update = true;
	} else if (priv->reduced_txpower &&
		   (iwl_is_associated(priv, IWL_RXON_CTX_PAN) ||
		   (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) ||
		   (uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
		   BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK)) ||
		   !(uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
		   BT_UART_MSG_FRAME3OBEX_MSK)))) {
		/* disable reduced tx power */
		priv->reduced_txpower = false;
		priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
		need_update = true;
	}

	return need_update;
}

static void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
					 struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_bt_coex_profile_notif *coex = (void *)pkt->data;
	struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;

	if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
		/* bt coex disabled */
		return;
	}

	IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
	IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
	IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
	IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
			coex->bt_ci_compliance);
	iwlagn_print_uartmsg(priv, uart_msg);

	priv->last_bt_traffic_load = priv->bt_traffic_load;
	priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);

	if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
		if (priv->bt_status != coex->bt_status ||
		    priv->last_bt_traffic_load != coex->bt_traffic_load) {
			if (coex->bt_status) {
				/* BT on */
				if (!priv->bt_ch_announce)
					priv->bt_traffic_load =
						IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
				else
					priv->bt_traffic_load =
						coex->bt_traffic_load;
			} else {
				/* BT off */
				priv->bt_traffic_load =
					IWL_BT_COEX_TRAFFIC_LOAD_NONE;
			}
			priv->bt_status = coex->bt_status;
			queue_work(priv->workqueue,
				   &priv->bt_traffic_change_work);
		}
	}

	/* schedule to send runtime bt_config */
	/* check reduce power before change ack/cts kill mask */
	if (iwlagn_fill_txpower_mode(priv, uart_msg) ||
	    iwlagn_set_kill_msk(priv, uart_msg))
		queue_work(priv->workqueue, &priv->bt_runtime_config);


	/* FIXME: based on notification, adjust the prio_boost */

	priv->bt_ci_compliance = coex->bt_ci_compliance;
}

void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
{
	priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
		iwlagn_bt_coex_profile_notif;
}

void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
{
	INIT_WORK(&priv->bt_traffic_change_work,
		  iwlagn_bt_traffic_change_work);
}

void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
{
	cancel_work_sync(&priv->bt_traffic_change_work);
}

static bool is_single_rx_stream(struct iwl_priv *priv)
{
	return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
	       priv->current_ht_config.single_chain_sufficient;
}

#define IWL_NUM_RX_CHAINS_MULTIPLE	3
#define IWL_NUM_RX_CHAINS_SINGLE	2
#define IWL_NUM_IDLE_CHAINS_DUAL	2
#define IWL_NUM_IDLE_CHAINS_SINGLE	1

/*
 * Determine how many receiver/antenna chains to use.
 *
 * More provides better reception via diversity.  Fewer saves power
 * at the expense of throughput, but only when not in powersave to
 * start with.
 *
 * MIMO (dual stream) requires at least 2, but works better with 3.
 * This does not determine *which* chains to use, just how many.
 */
static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
{
	if (priv->lib->bt_params &&
	    priv->lib->bt_params->advanced_bt_coexist &&
	    (priv->bt_full_concurrent ||
	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
		/*
		 * only use chain 'A' in bt high traffic load or
		 * full concurrency mode
		 */
		return IWL_NUM_RX_CHAINS_SINGLE;
	}
	/* # of Rx chains to use when expecting MIMO. */
	if (is_single_rx_stream(priv))
		return IWL_NUM_RX_CHAINS_SINGLE;
	else
		return IWL_NUM_RX_CHAINS_MULTIPLE;
}

/*
 * When we are in power saving mode, unless device support spatial
 * multiplexing power save, use the active count for rx chain count.
 */
static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
{
	/* # Rx chains when idling, depending on SMPS mode */
	switch (priv->current_ht_config.smps) {
	case IEEE80211_SMPS_STATIC:
	case IEEE80211_SMPS_DYNAMIC:
		return IWL_NUM_IDLE_CHAINS_SINGLE;
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_OFF:
		return active_cnt;
	default:
		WARN(1, "invalid SMPS mode %d",
		     priv->current_ht_config.smps);
		return active_cnt;
	}
}

/* up to 4 chains */
static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
{
	u8 res;
	res = (chain_bitmap & BIT(0)) >> 0;
	res += (chain_bitmap & BIT(1)) >> 1;
	res += (chain_bitmap & BIT(2)) >> 2;
	res += (chain_bitmap & BIT(3)) >> 3;
	return res;
}

/**
 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 *
 * Selects how many and which Rx receivers/antennas/chains to use.
 * This should not be used for scan command ... it puts data in wrong place.
 */
void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	bool is_single = is_single_rx_stream(priv);
	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
	u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
	u32 active_chains;
	u16 rx_chain;

	/* Tell uCode which antennas are actually connected.
	 * Before first association, we assume all antennas are connected.
	 * Just after first association, iwl_chain_noise_calibration()
	 *    checks which antennas actually *are* connected. */
	if (priv->chain_noise_data.active_chains)
		active_chains = priv->chain_noise_data.active_chains;
	else
		active_chains = priv->nvm_data->valid_rx_ant;

	if (priv->lib->bt_params &&
	    priv->lib->bt_params->advanced_bt_coexist &&
	    (priv->bt_full_concurrent ||
	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
		/*
		 * only use chain 'A' in bt high traffic load or
		 * full concurrency mode
		 */
		active_chains = first_antenna(active_chains);
	}

	rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;

	/* How many receivers should we use? */
	active_rx_cnt = iwl_get_active_rx_chain_count(priv);
	idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);


	/* correct rx chain count according hw settings
	 * and chain noise calibration
	 */
	valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
	if (valid_rx_cnt < active_rx_cnt)
		active_rx_cnt = valid_rx_cnt;

	if (valid_rx_cnt < idle_rx_cnt)
		idle_rx_cnt = valid_rx_cnt;

	rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
	rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;

	ctx->staging.rx_chain = cpu_to_le16(rx_chain);

	if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
		ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
	else
		ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;

	IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
			ctx->staging.rx_chain,
			active_rx_cnt, idle_rx_cnt);

	WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
		active_rx_cnt < idle_rx_cnt);
}

u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
{
	int i;
	u8 ind = ant;

	if (priv->band == IEEE80211_BAND_2GHZ &&
	    priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
		return 0;

	for (i = 0; i < RATE_ANT_NUM - 1; i++) {
		ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
		if (valid & BIT(ind))
			return ind;
	}
	return ant;
}

#ifdef CONFIG_PM_SLEEP
static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
{
	int i;

	for (i = 0; i < IWLAGN_P1K_SIZE; i++)
		out[i] = cpu_to_le16(p1k[i]);
}

struct wowlan_key_data {
	struct iwl_rxon_context *ctx;
	struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
	struct iwlagn_wowlan_tkip_params_cmd *tkip;
	const u8 *bssid;
	bool error, use_rsc_tsc, use_tkip;
};


static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
			       struct ieee80211_sta *sta,
			       struct ieee80211_key_conf *key,
			       void *_data)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct wowlan_key_data *data = _data;
	struct iwl_rxon_context *ctx = data->ctx;
	struct aes_sc *aes_sc, *aes_tx_sc = NULL;
	struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
	struct iwlagn_p1k_cache *rx_p1ks;
	u8 *rx_mic_key;
	struct ieee80211_key_seq seq;
	u32 cur_rx_iv32 = 0;
	u16 p1k[IWLAGN_P1K_SIZE];
	int ret, i;

	mutex_lock(&priv->mutex);

	if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	     key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
	     !sta && !ctx->key_mapping_keys)
		ret = iwl_set_default_wep_key(priv, ctx, key);
	else
		ret = iwl_set_dynamic_key(priv, ctx, key, sta);

	if (ret) {
		IWL_ERR(priv, "Error setting key during suspend!\n");
		data->error = true;
	}

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		if (sta) {
			u64 pn64;

			tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
			tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;

			rx_p1ks = data->tkip->rx_uni;

			pn64 = atomic64_read(&key->tx_pn);
			tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
			tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));

			ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
			iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);

			memcpy(data->tkip->mic_keys.tx,
			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
			       IWLAGN_MIC_KEY_SIZE);

			rx_mic_key = data->tkip->mic_keys.rx_unicast;
		} else {
			tkip_sc =
				data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
			rx_p1ks = data->tkip->rx_multi;
			rx_mic_key = data->tkip->mic_keys.rx_mcast;
		}

		/*
		 * For non-QoS this relies on the fact that both the uCode and
		 * mac80211 use TID 0 (as they need to to avoid replay attacks)
		 * for checking the IV in the frames.
		 */
		for (i = 0; i < IWLAGN_NUM_RSC; i++) {
			ieee80211_get_key_rx_seq(key, i, &seq);
			tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
			tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
			/* wrapping isn't allowed, AP must rekey */
			if (seq.tkip.iv32 > cur_rx_iv32)
				cur_rx_iv32 = seq.tkip.iv32;
		}

		ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
		iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
		ieee80211_get_tkip_rx_p1k(key, data->bssid,
					  cur_rx_iv32 + 1, p1k);
		iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);

		memcpy(rx_mic_key,
		       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
		       IWLAGN_MIC_KEY_SIZE);

		data->use_tkip = true;
		data->use_rsc_tsc = true;
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		if (sta) {
			u64 pn64;

			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
			aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;

			pn64 = atomic64_read(&key->tx_pn);
			aes_tx_sc->pn = cpu_to_le64(pn64);
		} else
			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;

		/*
		 * For non-QoS this relies on the fact that both the uCode and
		 * mac80211 use TID 0 for checking the IV in the frames.
		 */
		for (i = 0; i < IWLAGN_NUM_RSC; i++) {
			u8 *pn = seq.ccmp.pn;

			ieee80211_get_key_rx_seq(key, i, &seq);
			aes_sc[i].pn = cpu_to_le64(
					(u64)pn[5] |
					((u64)pn[4] << 8) |
					((u64)pn[3] << 16) |
					((u64)pn[2] << 24) |
					((u64)pn[1] << 32) |
					((u64)pn[0] << 40));
		}
		data->use_rsc_tsc = true;
		break;
	}

	mutex_unlock(&priv->mutex);
}

int iwlagn_send_patterns(struct iwl_priv *priv,
			struct cfg80211_wowlan *wowlan)
{
	struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
	struct iwl_host_cmd cmd = {
		.id = REPLY_WOWLAN_PATTERNS,
		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
	};
	int i, err;

	if (!wowlan->n_patterns)
		return 0;

	cmd.len[0] = sizeof(*pattern_cmd) +
		wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);

	pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
	if (!pattern_cmd)
		return -ENOMEM;

	pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);

	for (i = 0; i < wowlan->n_patterns; i++) {
		int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);

		memcpy(&pattern_cmd->patterns[i].mask,
			wowlan->patterns[i].mask, mask_len);
		memcpy(&pattern_cmd->patterns[i].pattern,
			wowlan->patterns[i].pattern,
			wowlan->patterns[i].pattern_len);
		pattern_cmd->patterns[i].mask_size = mask_len;
		pattern_cmd->patterns[i].pattern_size =
			wowlan->patterns[i].pattern_len;
	}

	cmd.data[0] = pattern_cmd;
	err = iwl_dvm_send_cmd(priv, &cmd);
	kfree(pattern_cmd);
	return err;
}

int iwlagn_suspend(struct iwl_priv *priv, struct cfg80211_wowlan *wowlan)
{
	struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
	struct iwl_rxon_cmd rxon;
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
	struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
	struct iwlagn_d3_config_cmd d3_cfg_cmd = {
		/*
		 * Program the minimum sleep time to 10 seconds, as many
		 * platforms have issues processing a wakeup signal while
		 * still being in the process of suspending.
		 */
		.min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
	};
	struct wowlan_key_data key_data = {
		.ctx = ctx,
		.bssid = ctx->active.bssid_addr,
		.use_rsc_tsc = false,
		.tkip = &tkip_cmd,
		.use_tkip = false,
	};
	int ret, i;
	u16 seq;

	key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
	if (!key_data.rsc_tsc)
		return -ENOMEM;

	memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));

	/*
	 * We know the last used seqno, and the uCode expects to know that
	 * one, it will increment before TX.
	 */
	seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
	wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);

	/*
	 * For QoS counters, we store the one to use next, so subtract 0x10
	 * since the uCode will add 0x10 before using the value.
	 */
	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
		seq = priv->tid_data[IWL_AP_ID][i].seq_number;
		seq -= 0x10;
		wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
	}

	if (wowlan->disconnect)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
				    IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
	if (wowlan->magic_pkt)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
	if (wowlan->gtk_rekey_failure)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
	if (wowlan->eap_identity_req)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
	if (wowlan->four_way_handshake)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
	if (wowlan->n_patterns)
		wakeup_filter_cmd.enabled |=
			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);

	if (wowlan->rfkill_release)
		d3_cfg_cmd.wakeup_flags |=
			cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);

	iwl_scan_cancel_timeout(priv, 200);

	memcpy(&rxon, &ctx->active, sizeof(rxon));

	priv->ucode_loaded = false;
	iwl_trans_stop_device(priv->trans);
	ret = iwl_trans_start_hw(priv->trans);
	if (ret)
		goto out;

	priv->wowlan = true;

	ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
	if (ret)
		goto out;

	/* now configure WoWLAN ucode */
	ret = iwl_alive_start(priv);
	if (ret)
		goto out;

	memcpy(&ctx->staging, &rxon, sizeof(rxon));
	ret = iwlagn_commit_rxon(priv, ctx);
	if (ret)
		goto out;

	ret = iwl_power_update_mode(priv, true);
	if (ret)
		goto out;

	if (!iwlwifi_mod_params.sw_crypto) {
		/* mark all keys clear */
		priv->ucode_key_table = 0;
		ctx->key_mapping_keys = 0;

		/*
		 * This needs to be unlocked due to lock ordering
		 * constraints. Since we're in the suspend path
		 * that isn't really a problem though.
		 */
		mutex_unlock(&priv->mutex);
		ieee80211_iter_keys(priv->hw, ctx->vif,
				    iwlagn_wowlan_program_keys,
				    &key_data);
		mutex_lock(&priv->mutex);
		if (key_data.error) {
			ret = -EIO;
			goto out;
		}

		if (key_data.use_rsc_tsc) {
			struct iwl_host_cmd rsc_tsc_cmd = {
				.id = REPLY_WOWLAN_TSC_RSC_PARAMS,
				.data[0] = key_data.rsc_tsc,
				.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
				.len[0] = sizeof(*key_data.rsc_tsc),
			};

			ret = iwl_dvm_send_cmd(priv, &rsc_tsc_cmd);
			if (ret)
				goto out;
		}

		if (key_data.use_tkip) {
			ret = iwl_dvm_send_cmd_pdu(priv,
						 REPLY_WOWLAN_TKIP_PARAMS,
						 0, sizeof(tkip_cmd),
						 &tkip_cmd);
			if (ret)
				goto out;
		}

		if (priv->have_rekey_data) {
			memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
			memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
			kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
			memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
			kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
			kek_kck_cmd.replay_ctr = priv->replay_ctr;

			ret = iwl_dvm_send_cmd_pdu(priv,
						 REPLY_WOWLAN_KEK_KCK_MATERIAL,
						 0, sizeof(kek_kck_cmd),
						 &kek_kck_cmd);
			if (ret)
				goto out;
		}
	}

	ret = iwl_dvm_send_cmd_pdu(priv, REPLY_D3_CONFIG, 0,
				     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
	if (ret)
		goto out;

	ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_WAKEUP_FILTER,
				 0, sizeof(wakeup_filter_cmd),
				 &wakeup_filter_cmd);
	if (ret)
		goto out;

	ret = iwlagn_send_patterns(priv, wowlan);
 out:
	kfree(key_data.rsc_tsc);
	return ret;
}
#endif

int iwl_dvm_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
{
	if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
		IWL_WARN(priv, "Not sending command - %s KILL\n",
			 iwl_is_rfkill(priv) ? "RF" : "CT");
		return -EIO;
	}

	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
		IWL_ERR(priv, "Command %s failed: FW Error\n",
			iwl_get_cmd_string(priv->trans, cmd->id));
		return -EIO;
	}

	/*
	 * This can happen upon FW ASSERT: we clear the STATUS_FW_ERROR flag
	 * in iwl_down but cancel the workers only later.
	 */
	if (!priv->ucode_loaded) {
		IWL_ERR(priv, "Fw not loaded - dropping CMD: %x\n", cmd->id);
		return -EIO;
	}

	/*
	 * Synchronous commands from this op-mode must hold
	 * the mutex, this ensures we don't try to send two
	 * (or more) synchronous commands at a time.
	 */
	if (!(cmd->flags & CMD_ASYNC))
		lockdep_assert_held(&priv->mutex);

	return iwl_trans_send_cmd(priv->trans, cmd);
}

int iwl_dvm_send_cmd_pdu(struct iwl_priv *priv, u8 id,
			 u32 flags, u16 len, const void *data)
{
	struct iwl_host_cmd cmd = {
		.id = id,
		.len = { len, },
		.data = { data, },
		.flags = flags,
	};

	return iwl_dvm_send_cmd(priv, &cmd);
}