aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/dvm/mac80211.c
blob: fa4d1b8cd9f6fb62ab56e4bdc9f1811efde7d30d (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
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
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
/******************************************************************************
 *
 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * 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.
 *
 * 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/init.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>

#include <net/ieee80211_radiotap.h>
#include <net/mac80211.h>

#include <asm/div64.h>

#include "iwl-io.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "iwl-modparams.h"

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

/*****************************************************************************
 *
 * mac80211 entry point functions
 *
 *****************************************************************************/

static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_STATION),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_AP),
	},
};

static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
	{
		.max = 2,
		.types = BIT(NL80211_IFTYPE_STATION),
	},
};

static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_STATION),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_P2P_GO) |
			 BIT(NL80211_IFTYPE_AP),
	},
};

static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
	{
		.max = 2,
		.types = BIT(NL80211_IFTYPE_STATION),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_P2P_CLIENT),
	},
};

static const struct ieee80211_iface_combination
iwlagn_iface_combinations_dualmode[] = {
	{ .num_different_channels = 1,
	  .max_interfaces = 2,
	  .beacon_int_infra_match = true,
	  .limits = iwlagn_sta_ap_limits,
	  .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
	},
	{ .num_different_channels = 1,
	  .max_interfaces = 2,
	  .limits = iwlagn_2sta_limits,
	  .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
	},
};

static const struct ieee80211_iface_combination
iwlagn_iface_combinations_p2p[] = {
	{ .num_different_channels = 1,
	  .max_interfaces = 2,
	  .beacon_int_infra_match = true,
	  .limits = iwlagn_p2p_sta_go_limits,
	  .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
	},
	{ .num_different_channels = 1,
	  .max_interfaces = 2,
	  .limits = iwlagn_p2p_2sta_limits,
	  .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
	},
};

/*
 * Not a mac80211 entry point function, but it fits in with all the
 * other mac80211 functions grouped here.
 */
int iwlagn_mac_setup_register(struct iwl_priv *priv,
			      const struct iwl_ucode_capabilities *capa)
{
	int ret;
	struct ieee80211_hw *hw = priv->hw;
	struct iwl_rxon_context *ctx;

	hw->rate_control_algorithm = "iwl-agn-rs";

	/* Tell mac80211 our characteristics */
	hw->flags = IEEE80211_HW_SIGNAL_DBM |
		    IEEE80211_HW_AMPDU_AGGREGATION |
		    IEEE80211_HW_NEED_DTIM_PERIOD |
		    IEEE80211_HW_SPECTRUM_MGMT |
		    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
		    IEEE80211_HW_QUEUE_CONTROL |
		    IEEE80211_HW_SUPPORTS_PS |
		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
		    IEEE80211_HW_WANT_MONITOR_VIF |
		    IEEE80211_HW_SCAN_WHILE_IDLE;

	hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;

	/*
	 * Including the following line will crash some AP's.  This
	 * workaround removes the stimulus which causes the crash until
	 * the AP software can be fixed.
	hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
	 */

	if (priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)
		hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
			     IEEE80211_HW_SUPPORTS_STATIC_SMPS;

#ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP
	/* enable 11w if the uCode advertise */
	if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
#endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */
		hw->flags |= IEEE80211_HW_MFP_CAPABLE;

	hw->sta_data_size = sizeof(struct iwl_station_priv);
	hw->vif_data_size = sizeof(struct iwl_vif_priv);

	for_each_context(priv, ctx) {
		hw->wiphy->interface_modes |= ctx->interface_modes;
		hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
	}

	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);

	if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
		hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
		hw->wiphy->n_iface_combinations =
			ARRAY_SIZE(iwlagn_iface_combinations_p2p);
	} else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
		hw->wiphy->iface_combinations =
			iwlagn_iface_combinations_dualmode;
		hw->wiphy->n_iface_combinations =
			ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
	}

	hw->wiphy->max_remain_on_channel_duration = 500;

	hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
			    WIPHY_FLAG_DISABLE_BEACON_HINTS |
			    WIPHY_FLAG_IBSS_RSN;

#ifdef CONFIG_PM_SLEEP
	if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
	    priv->trans->ops->wowlan_suspend &&
	    device_can_wakeup(priv->trans->dev)) {
		hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
					  WIPHY_WOWLAN_DISCONNECT |
					  WIPHY_WOWLAN_EAP_IDENTITY_REQ |
					  WIPHY_WOWLAN_RFKILL_RELEASE;
		if (!iwlwifi_mod_params.sw_crypto)
			hw->wiphy->wowlan.flags |=
				WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
				WIPHY_WOWLAN_GTK_REKEY_FAILURE;

		hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
		hw->wiphy->wowlan.pattern_min_len =
					IWLAGN_WOWLAN_MIN_PATTERN_LEN;
		hw->wiphy->wowlan.pattern_max_len =
					IWLAGN_WOWLAN_MAX_PATTERN_LEN;
	}
#endif

	if (iwlwifi_mod_params.power_save)
		hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
	else
		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;

	hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
	/* we create the 802.11 header and a max-length SSID element */
	hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;

	/*
	 * We don't use all queues: 4 and 9 are unused and any
	 * aggregation queue gets mapped down to the AC queue.
	 */
	hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;

	hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;

	if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
			&priv->eeprom_data->bands[IEEE80211_BAND_2GHZ];
	if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels)
		priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
			&priv->eeprom_data->bands[IEEE80211_BAND_5GHZ];

	hw->wiphy->hw_version = priv->trans->hw_id;

	iwl_leds_init(priv);

	ret = ieee80211_register_hw(priv->hw);
	if (ret) {
		IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
		iwl_leds_exit(priv);
		return ret;
	}
	priv->mac80211_registered = 1;

	return 0;
}

void iwlagn_mac_unregister(struct iwl_priv *priv)
{
	if (!priv->mac80211_registered)
		return;
	iwl_leds_exit(priv);
	ieee80211_unregister_hw(priv->hw);
	priv->mac80211_registered = 0;
}

static int __iwl_up(struct iwl_priv *priv)
{
	struct iwl_rxon_context *ctx;
	int ret;

	lockdep_assert_held(&priv->mutex);

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
		return -EIO;
	}

	for_each_context(priv, ctx) {
		ret = iwlagn_alloc_bcast_station(priv, ctx);
		if (ret) {
			iwl_dealloc_bcast_stations(priv);
			return ret;
		}
	}

	ret = iwl_run_init_ucode(priv);
	if (ret) {
		IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
		goto error;
	}

	ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
	if (ret) {
		IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
		goto error;
	}

	ret = iwl_alive_start(priv);
	if (ret)
		goto error;
	return 0;

 error:
	set_bit(STATUS_EXIT_PENDING, &priv->status);
	iwl_down(priv);
	clear_bit(STATUS_EXIT_PENDING, &priv->status);

	IWL_ERR(priv, "Unable to initialize device.\n");
	return ret;
}

static int iwlagn_mac_start(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	int ret;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	/* we should be verifying the device is ready to be opened */
	mutex_lock(&priv->mutex);
	ret = __iwl_up(priv);
	mutex_unlock(&priv->mutex);
	if (ret)
		return ret;

	IWL_DEBUG_INFO(priv, "Start UP work done.\n");

	/* Now we should be done, and the READY bit should be set. */
	if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
		ret = -EIO;

	iwlagn_led_enable(priv);

	priv->is_open = 1;
	IWL_DEBUG_MAC80211(priv, "leave\n");
	return 0;
}

static void iwlagn_mac_stop(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (!priv->is_open)
		return;

	priv->is_open = 0;

	mutex_lock(&priv->mutex);
	iwl_down(priv);
	mutex_unlock(&priv->mutex);

	iwl_cancel_deferred_work(priv);

	flush_workqueue(priv->workqueue);

	/* User space software may expect getting rfkill changes
	 * even if interface is down, trans->down will leave the RF
	 * kill interrupt enabled
	 */
	iwl_trans_stop_hw(priv->trans, false);

	IWL_DEBUG_MAC80211(priv, "leave\n");
}

static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct cfg80211_gtk_rekey_data *data)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	if (iwlwifi_mod_params.sw_crypto)
		return;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
		goto out;

	memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
	memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
	priv->replay_ctr =
		cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
	priv->have_rekey_data = true;

 out:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");
}

#ifdef CONFIG_PM_SLEEP

static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
			      struct cfg80211_wowlan *wowlan)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	int ret;

	if (WARN_ON(!wowlan))
		return -EINVAL;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	/* Don't attempt WoWLAN when not associated, tear down instead. */
	if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
	    !iwl_is_associated_ctx(ctx)) {
		ret = 1;
		goto out;
	}

	ret = iwlagn_suspend(priv, wowlan);
	if (ret)
		goto error;

	iwl_trans_wowlan_suspend(priv->trans);

	goto out;

 error:
	priv->wowlan = false;
	iwlagn_prepare_restart(priv);
	ieee80211_restart_hw(priv->hw);
 out:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return ret;
}

static int iwlagn_mac_resume(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	struct ieee80211_vif *vif;
	unsigned long flags;
	u32 base, status = 0xffffffff;
	int ret = -EIO;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
			  CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);

	base = priv->device_pointers.error_event_table;
	if (iwlagn_hw_valid_rtc_data_addr(base)) {
		spin_lock_irqsave(&priv->trans->reg_lock, flags);
		ret = iwl_grab_nic_access_silent(priv->trans);
		if (likely(ret == 0)) {
			iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base);
			status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
			iwl_release_nic_access(priv->trans);
		}
		spin_unlock_irqrestore(&priv->trans->reg_lock, flags);

#ifdef CONFIG_IWLWIFI_DEBUGFS
		if (ret == 0) {
			const struct fw_img *img;

			img = &(priv->fw->img[IWL_UCODE_WOWLAN]);
			if (!priv->wowlan_sram) {
				priv->wowlan_sram =
				   kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
						GFP_KERNEL);
			}

			if (priv->wowlan_sram)
				_iwl_read_targ_mem_dwords(
				      priv->trans, 0x800000,
				      priv->wowlan_sram,
				      img->sec[IWL_UCODE_SECTION_DATA].len / 4);
		}
#endif
	}

	/* we'll clear ctx->vif during iwlagn_prepare_restart() */
	vif = ctx->vif;

	priv->wowlan = false;

	iwlagn_prepare_restart(priv);

	memset((void *)&ctx->active, 0, sizeof(ctx->active));
	iwl_connection_init_rx_config(priv, ctx);
	iwlagn_set_rxon_chain(priv, ctx);

	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	ieee80211_resume_disconnect(vif);

	return 1;
}

static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	device_set_wakeup_enable(priv->trans->dev, enabled);
}
#endif

static void iwlagn_mac_tx(struct ieee80211_hw *hw,
			  struct ieee80211_tx_control *control,
			  struct sk_buff *skb)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
		     ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);

	if (iwlagn_tx_skb(priv, control->sta, skb))
		ieee80211_free_txskb(hw, skb);
}

static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       struct ieee80211_key_conf *keyconf,
				       struct ieee80211_sta *sta,
				       u32 iv32, u16 *phase1key)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
}

static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
			      struct ieee80211_vif *vif,
			      struct ieee80211_sta *sta,
			      struct ieee80211_key_conf *key)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
	struct iwl_rxon_context *ctx = vif_priv->ctx;
	int ret;
	bool is_default_wep_key = false;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (iwlwifi_mod_params.sw_crypto) {
		IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
		return -EOPNOTSUPP;
	}

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
		/* fall through */
	case WLAN_CIPHER_SUITE_CCMP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
		break;
	default:
		break;
	}

	/*
	 * We could program these keys into the hardware as well, but we
	 * don't expect much multicast traffic in IBSS and having keys
	 * for more stations is probably more useful.
	 *
	 * Mark key TX-only and return 0.
	 */
	if (vif->type == NL80211_IFTYPE_ADHOC &&
	    !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
		key->hw_key_idx = WEP_INVALID_OFFSET;
		return 0;
	}

	/* If they key was TX-only, accept deletion */
	if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
		return 0;

	mutex_lock(&priv->mutex);
	iwl_scan_cancel_timeout(priv, 100);

	BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);

	/*
	 * If we are getting WEP group key and we didn't receive any key mapping
	 * so far, we are in legacy wep mode (group key only), otherwise we are
	 * in 1X mode.
	 * In legacy wep mode, we use another host command to the uCode.
	 */
	if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	     key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
		if (cmd == SET_KEY)
			is_default_wep_key = !ctx->key_mapping_keys;
		else
			is_default_wep_key =
				key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
	}


	switch (cmd) {
	case SET_KEY:
		if (is_default_wep_key) {
			ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
			break;
		}
		ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
		if (ret) {
			/*
			 * can't add key for RX, but we don't need it
			 * in the device for TX so still return 0
			 */
			ret = 0;
			key->hw_key_idx = WEP_INVALID_OFFSET;
		}

		IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
		break;
	case DISABLE_KEY:
		if (is_default_wep_key)
			ret = iwl_remove_default_wep_key(priv, ctx, key);
		else
			ret = iwl_remove_dynamic_key(priv, ctx, key, sta);

		IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
		break;
	default:
		ret = -EINVAL;
	}

	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return ret;
}

static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
				   struct ieee80211_vif *vif,
				   enum ieee80211_ampdu_mlme_action action,
				   struct ieee80211_sta *sta, u16 tid, u16 *ssn,
				   u8 buf_size)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	int ret = -EINVAL;
	struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;

	IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
		     sta->addr, tid);

	if (!(priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE))
		return -EACCES;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
			break;
		IWL_DEBUG_HT(priv, "start Rx\n");
		ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
		break;
	case IEEE80211_AMPDU_RX_STOP:
		IWL_DEBUG_HT(priv, "stop Rx\n");
		ret = iwl_sta_rx_agg_stop(priv, sta, tid);
		break;
	case IEEE80211_AMPDU_TX_START:
		if (!priv->trans->ops->txq_enable)
			break;
		if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
			break;
		IWL_DEBUG_HT(priv, "start Tx\n");
		ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP:
		IWL_DEBUG_HT(priv, "stop Tx\n");
		ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
		if ((ret == 0) && (priv->agg_tids_count > 0)) {
			priv->agg_tids_count--;
			IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
				     priv->agg_tids_count);
		}
		if (!priv->agg_tids_count &&
		    priv->hw_params.use_rts_for_aggregation) {
			/*
			 * switch off RTS/CTS if it was previously enabled
			 */
			sta_priv->lq_sta.lq.general_params.flags &=
				~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
			iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
					&sta_priv->lq_sta.lq, CMD_ASYNC, false);
		}
		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
		break;
	}
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");
	return ret;
}

static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif,
			      struct ieee80211_sta *sta)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
	bool is_ap = vif->type == NL80211_IFTYPE_STATION;
	int ret;
	u8 sta_id;

	IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
			sta->addr);
	sta_priv->sta_id = IWL_INVALID_STATION;

	atomic_set(&sta_priv->pending_frames, 0);
	if (vif->type == NL80211_IFTYPE_AP)
		sta_priv->client = true;

	ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
				     is_ap, sta, &sta_id);
	if (ret) {
		IWL_ERR(priv, "Unable to add station %pM (%d)\n",
			sta->addr, ret);
		/* Should we return success if return code is EEXIST ? */
		return ret;
	}

	sta_priv->sta_id = sta_id;

	return 0;
}

static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
	int ret;

	IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);

	if (vif->type == NL80211_IFTYPE_STATION) {
		/*
		 * Station will be removed from device when the RXON
		 * is set to unassociated -- just deactivate it here
		 * to avoid re-programming it.
		 */
		ret = 0;
		iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
	} else {
		ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
		if (ret)
			IWL_DEBUG_QUIET_RFKILL(priv,
				"Error removing station %pM\n", sta->addr);
	}
	return ret;
}

static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif,
				struct ieee80211_sta *sta,
				enum ieee80211_sta_state old_state,
				enum ieee80211_sta_state new_state)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
	enum {
		NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
	} op = NONE;
	int ret;

	IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
			   sta->addr, old_state, new_state);

	mutex_lock(&priv->mutex);
	if (vif->type == NL80211_IFTYPE_STATION) {
		if (old_state == IEEE80211_STA_NOTEXIST &&
		    new_state == IEEE80211_STA_NONE)
			op = ADD;
		else if (old_state == IEEE80211_STA_NONE &&
			 new_state == IEEE80211_STA_NOTEXIST)
			op = REMOVE;
		else if (old_state == IEEE80211_STA_AUTH &&
			 new_state == IEEE80211_STA_ASSOC)
			op = HT_RATE_INIT;
	} else {
		if (old_state == IEEE80211_STA_AUTH &&
		    new_state == IEEE80211_STA_ASSOC)
			op = ADD_RATE_INIT;
		else if (old_state == IEEE80211_STA_ASSOC &&
			 new_state == IEEE80211_STA_AUTH)
			op = REMOVE;
	}

	switch (op) {
	case ADD:
		ret = iwlagn_mac_sta_add(hw, vif, sta);
		if (ret)
			break;
		/*
		 * Clear the in-progress flag, the AP station entry was added
		 * but we'll initialize LQ only when we've associated (which
		 * would also clear the in-progress flag). This is necessary
		 * in case we never initialize LQ because association fails.
		 */
		spin_lock_bh(&priv->sta_lock);
		priv->stations[iwl_sta_id(sta)].used &=
			~IWL_STA_UCODE_INPROGRESS;
		spin_unlock_bh(&priv->sta_lock);
		break;
	case REMOVE:
		ret = iwlagn_mac_sta_remove(hw, vif, sta);
		break;
	case ADD_RATE_INIT:
		ret = iwlagn_mac_sta_add(hw, vif, sta);
		if (ret)
			break;
		/* Initialize rate scaling */
		IWL_DEBUG_INFO(priv,
			       "Initializing rate scaling for station %pM\n",
			       sta->addr);
		iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
		ret = 0;
		break;
	case HT_RATE_INIT:
		/* Initialize rate scaling */
		ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
		if (ret)
			break;
		IWL_DEBUG_INFO(priv,
			       "Initializing rate scaling for station %pM\n",
			       sta->addr);
		iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
		ret = 0;
		break;
	default:
		ret = 0;
		break;
	}

	/*
	 * mac80211 might WARN if we fail, but due the way we
	 * (badly) handle hard rfkill, we might fail here
	 */
	if (iwl_is_rfkill(priv))
		ret = 0;

	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return ret;
}

static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
				      struct ieee80211_channel_switch *ch_switch)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct ieee80211_conf *conf = &hw->conf;
	struct ieee80211_channel *channel = ch_switch->channel;
	struct iwl_ht_config *ht_conf = &priv->current_ht_config;
	/*
	 * MULTI-FIXME
	 * When we add support for multiple interfaces, we need to
	 * revisit this. The channel switch command in the device
	 * only affects the BSS context, but what does that really
	 * mean? And what if we get a CSA on the second interface?
	 * This needs a lot of work.
	 */
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	u16 ch;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	mutex_lock(&priv->mutex);

	if (iwl_is_rfkill(priv))
		goto out;

	if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
	    test_bit(STATUS_SCANNING, &priv->status) ||
	    test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
		goto out;

	if (!iwl_is_associated_ctx(ctx))
		goto out;

	if (!priv->lib->set_channel_switch)
		goto out;

	ch = channel->hw_value;
	if (le16_to_cpu(ctx->active.channel) == ch)
		goto out;

	priv->current_ht_config.smps = conf->smps_mode;

	/* Configure HT40 channels */
	ctx->ht.enabled = conf_is_ht(conf);
	if (ctx->ht.enabled)
		iwlagn_config_ht40(conf, ctx);
	else
		ctx->ht.is_40mhz = false;

	if ((le16_to_cpu(ctx->staging.channel) != ch))
		ctx->staging.flags = 0;

	iwl_set_rxon_channel(priv, channel, ctx);
	iwl_set_rxon_ht(priv, ht_conf);
	iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);

	/*
	 * at this point, staging_rxon has the
	 * configuration for channel switch
	 */
	set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
	priv->switch_channel = cpu_to_le16(ch);
	if (priv->lib->set_channel_switch(priv, ch_switch)) {
		clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
		priv->switch_channel = 0;
		ieee80211_chswitch_done(ctx->vif, false);
	}

out:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");
}

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);
}

static void iwlagn_configure_filter(struct ieee80211_hw *hw,
				    unsigned int changed_flags,
				    unsigned int *total_flags,
				    u64 multicast)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	__le32 filter_or = 0, filter_nand = 0;
	struct iwl_rxon_context *ctx;

#define CHK(test, flag)	do { \
	if (*total_flags & (test))		\
		filter_or |= (flag);		\
	else					\
		filter_nand |= (flag);		\
	} while (0)

	IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
			changed_flags, *total_flags);

	CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
	/* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
	CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
	CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);

#undef CHK

	mutex_lock(&priv->mutex);

	for_each_context(priv, ctx) {
		ctx->staging.filter_flags &= ~filter_nand;
		ctx->staging.filter_flags |= filter_or;

		/*
		 * Not committing directly because hardware can perform a scan,
		 * but we'll eventually commit the filter flags change anyway.
		 */
	}

	mutex_unlock(&priv->mutex);

	/*
	 * Receiving all multicast frames is always enabled by the
	 * default flags setup in iwl_connection_init_rx_config()
	 * since we currently do not support programming multicast
	 * filters into the device.
	 */
	*total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
			FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
}

static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	mutex_lock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
		IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
		goto done;
	}
	if (iwl_is_rfkill(priv)) {
		IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
		goto done;
	}

	/*
	 * mac80211 will not push any more frames for transmit
	 * until the flush is completed
	 */
	if (drop) {
		IWL_DEBUG_MAC80211(priv, "send flush command\n");
		if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
			IWL_ERR(priv, "flush request fail\n");
			goto done;
		}
	}
	IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
	iwl_trans_wait_tx_queue_empty(priv->trans);
done:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");
}

static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
				     struct ieee80211_channel *channel,
				     enum nl80211_channel_type channel_type,
				     int duration)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
	int err = 0;

	if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
		return -EOPNOTSUPP;

	if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
		return -EOPNOTSUPP;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	if (test_bit(STATUS_SCAN_HW, &priv->status)) {
		/* mac80211 should not scan while ROC or ROC while scanning */
		if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) {
			err = -EBUSY;
			goto out;
		}

		iwl_scan_cancel_timeout(priv, 100);

		if (test_bit(STATUS_SCAN_HW, &priv->status)) {
			err = -EBUSY;
			goto out;
		}
	}

	priv->hw_roc_channel = channel;
	priv->hw_roc_chantype = channel_type;
	/* convert from ms to TU */
	priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024);
	priv->hw_roc_start_notified = false;
	cancel_delayed_work(&priv->hw_roc_disable_work);

	if (!ctx->is_active) {
		static const struct iwl_qos_info default_qos_data = {
			.def_qos_parm = {
				.ac[0] = {
					.cw_min = cpu_to_le16(3),
					.cw_max = cpu_to_le16(7),
					.aifsn = 2,
					.edca_txop = cpu_to_le16(1504),
				},
				.ac[1] = {
					.cw_min = cpu_to_le16(7),
					.cw_max = cpu_to_le16(15),
					.aifsn = 2,
					.edca_txop = cpu_to_le16(3008),
				},
				.ac[2] = {
					.cw_min = cpu_to_le16(15),
					.cw_max = cpu_to_le16(1023),
					.aifsn = 3,
				},
				.ac[3] = {
					.cw_min = cpu_to_le16(15),
					.cw_max = cpu_to_le16(1023),
					.aifsn = 7,
				},
			},
		};

		ctx->is_active = true;
		ctx->qos_data = default_qos_data;
		ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
		memcpy(ctx->staging.node_addr,
		       priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
		       ETH_ALEN);
		memcpy(ctx->staging.bssid_addr,
		       priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
		       ETH_ALEN);
		err = iwlagn_commit_rxon(priv, ctx);
		if (err)
			goto out;
		ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
					     RXON_FILTER_PROMISC_MSK |
					     RXON_FILTER_CTL2HOST_MSK;

		err = iwlagn_commit_rxon(priv, ctx);
		if (err) {
			iwlagn_disable_roc(priv);
			goto out;
		}
		priv->hw_roc_setup = true;
	}

	err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
	if (err)
		iwlagn_disable_roc(priv);

 out:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return err;
}

static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
		return -EOPNOTSUPP;

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);
	iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
	iwlagn_disable_roc(priv);
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return 0;
}

static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
				     enum ieee80211_rssi_event rssi_event)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	IWL_DEBUG_MAC80211(priv, "enter\n");
	mutex_lock(&priv->mutex);

	if (priv->cfg->bt_params &&
			priv->cfg->bt_params->advanced_bt_coexist) {
		if (rssi_event == RSSI_EVENT_LOW)
			priv->bt_enable_pspoll = true;
		else if (rssi_event == RSSI_EVENT_HIGH)
			priv->bt_enable_pspoll = false;

		iwlagn_send_advance_bt_config(priv);
	} else {
		IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
				"ignoring RSSI callback\n");
	}

	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");
}

static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
			      struct ieee80211_sta *sta, bool set)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	queue_work(priv->workqueue, &priv->beacon_update);

	return 0;
}

static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, u16 queue,
			      const struct ieee80211_tx_queue_params *params)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
	struct iwl_rxon_context *ctx = vif_priv->ctx;
	int q;

	if (WARN_ON(!ctx))
		return -EINVAL;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (!iwl_is_ready_rf(priv)) {
		IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
		return -EIO;
	}

	if (queue >= AC_NUM) {
		IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
		return 0;
	}

	q = AC_NUM - 1 - queue;

	mutex_lock(&priv->mutex);

	ctx->qos_data.def_qos_parm.ac[q].cw_min =
		cpu_to_le16(params->cw_min);
	ctx->qos_data.def_qos_parm.ac[q].cw_max =
		cpu_to_le16(params->cw_max);
	ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
	ctx->qos_data.def_qos_parm.ac[q].edca_txop =
			cpu_to_le16((params->txop * 32));

	ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");
	return 0;
}

static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);

	return priv->ibss_manager == IWL_IBSS_MANAGER;
}

static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
{
	iwl_connection_init_rx_config(priv, ctx);

	iwlagn_set_rxon_chain(priv, ctx);

	return iwlagn_commit_rxon(priv, ctx);
}

static int iwl_setup_interface(struct iwl_priv *priv,
			       struct iwl_rxon_context *ctx)
{
	struct ieee80211_vif *vif = ctx->vif;
	int err, ac;

	lockdep_assert_held(&priv->mutex);

	/*
	 * This variable will be correct only when there's just
	 * a single context, but all code using it is for hardware
	 * that supports only one context.
	 */
	priv->iw_mode = vif->type;

	ctx->is_active = true;

	err = iwl_set_mode(priv, ctx);
	if (err) {
		if (!ctx->always_active)
			ctx->is_active = false;
		return err;
	}

	if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
	    vif->type == NL80211_IFTYPE_ADHOC) {
		/*
		 * pretend to have high BT traffic as long as we
		 * are operating in IBSS mode, as this will cause
		 * the rate scaling etc. to behave as intended.
		 */
		priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
	}

	/* set up queue mappings */
	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
		vif->hw_queue[ac] = ctx->ac_to_queue[ac];

	if (vif->type == NL80211_IFTYPE_AP)
		vif->cab_queue = ctx->mcast_queue;
	else
		vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;

	return 0;
}

static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
	struct iwl_rxon_context *tmp, *ctx = NULL;
	int err;
	enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
	bool reset = false;

	IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
			   viftype, vif->addr);

	cancel_delayed_work_sync(&priv->hw_roc_disable_work);

	mutex_lock(&priv->mutex);

	iwlagn_disable_roc(priv);

	if (!iwl_is_ready_rf(priv)) {
		IWL_WARN(priv, "Try to add interface when device not ready\n");
		err = -EINVAL;
		goto out;
	}

	for_each_context(priv, tmp) {
		u32 possible_modes =
			tmp->interface_modes | tmp->exclusive_interface_modes;

		if (tmp->vif) {
			/* On reset we need to add the same interface again */
			if (tmp->vif == vif) {
				reset = true;
				ctx = tmp;
				break;
			}

			/* check if this busy context is exclusive */
			if (tmp->exclusive_interface_modes &
						BIT(tmp->vif->type)) {
				err = -EINVAL;
				goto out;
			}
			continue;
		}

		if (!(possible_modes & BIT(viftype)))
			continue;

		/* have maybe usable context w/o interface */
		ctx = tmp;
		break;
	}

	if (!ctx) {
		err = -EOPNOTSUPP;
		goto out;
	}

	vif_priv->ctx = ctx;
	ctx->vif = vif;

	err = iwl_setup_interface(priv, ctx);
	if (!err || reset)
		goto out;

	ctx->vif = NULL;
	priv->iw_mode = NL80211_IFTYPE_STATION;
 out:
	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");
	return err;
}

static void iwl_teardown_interface(struct iwl_priv *priv,
				   struct ieee80211_vif *vif,
				   bool mode_change)
{
	struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);

	lockdep_assert_held(&priv->mutex);

	if (priv->scan_vif == vif) {
		iwl_scan_cancel_timeout(priv, 200);
		iwl_force_scan_end(priv);
	}

	if (!mode_change) {
		iwl_set_mode(priv, ctx);
		if (!ctx->always_active)
			ctx->is_active = false;
	}

	/*
	 * When removing the IBSS interface, overwrite the
	 * BT traffic load with the stored one from the last
	 * notification, if any. If this is a device that
	 * doesn't implement this, this has no effect since
	 * both values are the same and zero.
	 */
	if (vif->type == NL80211_IFTYPE_ADHOC)
		priv->bt_traffic_load = priv->last_bt_traffic_load;
}

static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);

	IWL_DEBUG_MAC80211(priv, "enter\n");

	mutex_lock(&priv->mutex);

	if (WARN_ON(ctx->vif != vif)) {
		struct iwl_rxon_context *tmp;
		IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
		for_each_context(priv, tmp)
			IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
				tmp->ctxid, tmp, tmp->vif);
	}
	ctx->vif = NULL;

	iwl_teardown_interface(priv, vif, false);

	mutex_unlock(&priv->mutex);

	IWL_DEBUG_MAC80211(priv, "leave\n");

}

static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       enum nl80211_iftype newtype, bool newp2p)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_rxon_context *ctx, *tmp;
	enum nl80211_iftype newviftype = newtype;
	u32 interface_modes;
	int err;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	newtype = ieee80211_iftype_p2p(newtype, newp2p);

	mutex_lock(&priv->mutex);

	ctx = iwl_rxon_ctx_from_vif(vif);

	/*
	 * To simplify this code, only support changes on the
	 * BSS context. The PAN context is usually reassigned
	 * by creating/removing P2P interfaces anyway.
	 */
	if (ctx->ctxid != IWL_RXON_CTX_BSS) {
		err = -EBUSY;
		goto out;
	}

	if (!ctx->vif || !iwl_is_ready_rf(priv)) {
		/*
		 * Huh? But wait ... this can maybe happen when
		 * we're in the middle of a firmware restart!
		 */
		err = -EBUSY;
		goto out;
	}

	/* Check if the switch is supported in the same context */
	interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
	if (!(interface_modes & BIT(newtype))) {
		err = -EBUSY;
		goto out;
	}

	if (ctx->exclusive_interface_modes & BIT(newtype)) {
		for_each_context(priv, tmp) {
			if (ctx == tmp)
				continue;

			if (!tmp->is_active)
				continue;

			/*
			 * The current mode switch would be exclusive, but
			 * another context is active ... refuse the switch.
			 */
			err = -EBUSY;
			goto out;
		}
	}

	/* success */
	iwl_teardown_interface(priv, vif, true);
	vif->type = newviftype;
	vif->p2p = newp2p;
	err = iwl_setup_interface(priv, ctx);
	WARN_ON(err);
	/*
	 * We've switched internally, but submitting to the
	 * device may have failed for some reason. Mask this
	 * error, because otherwise mac80211 will not switch
	 * (and set the interface type back) and we'll be
	 * out of sync with it.
	 */
	err = 0;

 out:
	mutex_unlock(&priv->mutex);
	IWL_DEBUG_MAC80211(priv, "leave\n");

	return err;
}

static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif,
			      struct cfg80211_scan_request *req)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	int ret;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	if (req->n_channels == 0)
		return -EINVAL;

	mutex_lock(&priv->mutex);

	/*
	 * If an internal scan is in progress, just set
	 * up the scan_request as per above.
	 */
	if (priv->scan_type != IWL_SCAN_NORMAL) {
		IWL_DEBUG_SCAN(priv,
			       "SCAN request during internal scan - defer\n");
		priv->scan_request = req;
		priv->scan_vif = vif;
		ret = 0;
	} else {
		priv->scan_request = req;
		priv->scan_vif = vif;
		/*
		 * mac80211 will only ask for one band at a time
		 * so using channels[0] here is ok
		 */
		ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
					req->channels[0]->band);
		if (ret) {
			priv->scan_request = NULL;
			priv->scan_vif = NULL;
		}
	}

	IWL_DEBUG_MAC80211(priv, "leave\n");

	mutex_unlock(&priv->mutex);

	return ret;
}

static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
{
	struct iwl_addsta_cmd cmd = {
		.mode = STA_CONTROL_MODIFY_MSK,
		.station_flags_msk = STA_FLG_PWR_SAVE_MSK,
		.sta.sta_id = sta_id,
	};

	iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
}

static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
				  struct ieee80211_vif *vif,
				  enum sta_notify_cmd cmd,
				  struct ieee80211_sta *sta)
{
	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
	struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
	int sta_id;

	IWL_DEBUG_MAC80211(priv, "enter\n");

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
		WARN_ON(!sta_priv->client);
		sta_priv->asleep = true;
		if (atomic_read(&sta_priv->pending_frames) > 0)
			ieee80211_sta_block_awake(hw, sta, true);
		break;
	case STA_NOTIFY_AWAKE:
		WARN_ON(!sta_priv->client);
		if (!sta_priv->asleep)
			break;
		sta_priv->asleep = false;
		sta_id = iwl_sta_id(sta);
		if (sta_id != IWL_INVALID_STATION)
			iwl_sta_modify_ps_wake(priv, sta_id);
		break;
	default:
		break;
	}
	IWL_DEBUG_MAC80211(priv, "leave\n");
}

struct ieee80211_ops iwlagn_hw_ops = {
	.tx = iwlagn_mac_tx,
	.start = iwlagn_mac_start,
	.stop = iwlagn_mac_stop,
#ifdef CONFIG_PM_SLEEP
	.suspend = iwlagn_mac_suspend,
	.resume = iwlagn_mac_resume,
	.set_wakeup = iwlagn_mac_set_wakeup,
#endif
	.add_interface = iwlagn_mac_add_interface,
	.remove_interface = iwlagn_mac_remove_interface,
	.change_interface = iwlagn_mac_change_interface,
	.config = iwlagn_mac_config,
	.configure_filter = iwlagn_configure_filter,
	.set_key = iwlagn_mac_set_key,
	.update_tkip_key = iwlagn_mac_update_tkip_key,
	.set_rekey_data = iwlagn_mac_set_rekey_data,
	.conf_tx = iwlagn_mac_conf_tx,
	.bss_info_changed = iwlagn_bss_info_changed,
	.ampdu_action = iwlagn_mac_ampdu_action,
	.hw_scan = iwlagn_mac_hw_scan,
	.sta_notify = iwlagn_mac_sta_notify,
	.sta_state = iwlagn_mac_sta_state,
	.channel_switch = iwlagn_mac_channel_switch,
	.flush = iwlagn_mac_flush,
	.tx_last_beacon = iwlagn_mac_tx_last_beacon,
	.remain_on_channel = iwlagn_mac_remain_on_channel,
	.cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
	.rssi_callback = iwlagn_mac_rssi_callback,
	CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
	CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
	.set_tim = iwlagn_mac_set_tim,
};

/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(void)
{
	struct iwl_priv *priv;
	struct iwl_op_mode *op_mode;
	/* mac80211 allocates memory for this device instance, including
	 *   space for this driver's private structure */
	struct ieee80211_hw *hw;

	hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
				sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
	if (!hw)
		goto out;

	op_mode = hw->priv;
	priv = IWL_OP_MODE_GET_DVM(op_mode);
	priv->hw = hw;

out:
	return hw;
}