summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/marvell/mwifiex/main.c
blob: 12e73995033229d8dee1ad002a4ea4c4dfd462ef (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
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
/*
 * Marvell Wireless LAN device driver: major functions
 *
 * Copyright (C) 2011-2014, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include <linux/suspend.h>

#include "main.h"
#include "wmm.h"
#include "cfg80211.h"
#include "11n.h"

#define VERSION	"1.0"
#define MFG_FIRMWARE	"mwifiex_mfg.bin"

static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK;
module_param(debug_mask, uint, 0);
MODULE_PARM_DESC(debug_mask, "bitmap for debug flags");

const char driver_version[] = "mwifiex " VERSION " (%s) ";
static char *cal_data_cfg;
module_param(cal_data_cfg, charp, 0);

static unsigned short driver_mode;
module_param(driver_mode, ushort, 0);
MODULE_PARM_DESC(driver_mode,
		 "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7");

bool mfg_mode;
module_param(mfg_mode, bool, 0);
MODULE_PARM_DESC(mfg_mode, "manufacturing mode enable:1, disable:0");

bool aggr_ctrl;
module_param(aggr_ctrl, bool, 0000);
MODULE_PARM_DESC(aggr_ctrl, "usb tx aggregation enable:1, disable:0");

/*
 * This function registers the device and performs all the necessary
 * initializations.
 *
 * The following initialization operations are performed -
 *      - Allocate adapter structure
 *      - Save interface specific operations table in adapter
 *      - Call interface specific initialization routine
 *      - Allocate private structures
 *      - Set default adapter structure parameters
 *      - Initialize locks
 *
 * In case of any errors during inittialization, this function also ensures
 * proper cleanup before exiting.
 */
static int mwifiex_register(void *card, struct device *dev,
			    struct mwifiex_if_ops *if_ops, void **padapter)
{
	struct mwifiex_adapter *adapter;
	int i;

	adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
	if (!adapter)
		return -ENOMEM;

	*padapter = adapter;
	adapter->dev = dev;
	adapter->card = card;

	/* Save interface specific operations in adapter */
	memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
	adapter->debug_mask = debug_mask;

	/* card specific initialization has been deferred until now .. */
	if (adapter->if_ops.init_if)
		if (adapter->if_ops.init_if(adapter))
			goto error;

	adapter->priv_num = 0;

	for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) {
		/* Allocate memory for private structure */
		adapter->priv[i] =
			kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL);
		if (!adapter->priv[i])
			goto error;

		adapter->priv[i]->adapter = adapter;
		adapter->priv_num++;
	}
	mwifiex_init_lock_list(adapter);

	timer_setup(&adapter->cmd_timer, mwifiex_cmd_timeout_func, 0);

	return 0;

error:
	mwifiex_dbg(adapter, ERROR,
		    "info: leave mwifiex_register with error\n");

	for (i = 0; i < adapter->priv_num; i++)
		kfree(adapter->priv[i]);

	kfree(adapter);

	return -1;
}

/*
 * This function unregisters the device and performs all the necessary
 * cleanups.
 *
 * The following cleanup operations are performed -
 *      - Free the timers
 *      - Free beacon buffers
 *      - Free private structures
 *      - Free adapter structure
 */
static int mwifiex_unregister(struct mwifiex_adapter *adapter)
{
	s32 i;

	if (adapter->if_ops.cleanup_if)
		adapter->if_ops.cleanup_if(adapter);

	del_timer_sync(&adapter->cmd_timer);

	/* Free private structures */
	for (i = 0; i < adapter->priv_num; i++) {
		if (adapter->priv[i]) {
			mwifiex_free_curr_bcn(adapter->priv[i]);
			kfree(adapter->priv[i]);
		}
	}

	if (adapter->nd_info) {
		for (i = 0 ; i < adapter->nd_info->n_matches ; i++)
			kfree(adapter->nd_info->matches[i]);
		kfree(adapter->nd_info);
		adapter->nd_info = NULL;
	}

	kfree(adapter->regd);

	kfree(adapter);
	return 0;
}

void mwifiex_queue_main_work(struct mwifiex_adapter *adapter)
{
	unsigned long flags;

	spin_lock_irqsave(&adapter->main_proc_lock, flags);
	if (adapter->mwifiex_processing) {
		adapter->more_task_flag = true;
		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
	} else {
		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
		queue_work(adapter->workqueue, &adapter->main_work);
	}
}
EXPORT_SYMBOL_GPL(mwifiex_queue_main_work);

static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter)
{
	unsigned long flags;

	spin_lock_irqsave(&adapter->rx_proc_lock, flags);
	if (adapter->rx_processing) {
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
	} else {
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
		queue_work(adapter->rx_workqueue, &adapter->rx_work);
	}
}

static int mwifiex_process_rx(struct mwifiex_adapter *adapter)
{
	unsigned long flags;
	struct sk_buff *skb;
	struct mwifiex_rxinfo *rx_info;

	spin_lock_irqsave(&adapter->rx_proc_lock, flags);
	if (adapter->rx_processing || adapter->rx_locked) {
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
		goto exit_rx_proc;
	} else {
		adapter->rx_processing = true;
		spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);
	}

	/* Check for Rx data */
	while ((skb = skb_dequeue(&adapter->rx_data_q))) {
		atomic_dec(&adapter->rx_pending);
		if ((adapter->delay_main_work ||
		     adapter->iface_type == MWIFIEX_USB) &&
		    (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) {
			if (adapter->if_ops.submit_rem_rx_urbs)
				adapter->if_ops.submit_rem_rx_urbs(adapter);
			adapter->delay_main_work = false;
			mwifiex_queue_main_work(adapter);
		}
		rx_info = MWIFIEX_SKB_RXCB(skb);
		if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) {
			if (adapter->if_ops.deaggr_pkt)
				adapter->if_ops.deaggr_pkt(adapter, skb);
			dev_kfree_skb_any(skb);
		} else {
			mwifiex_handle_rx_packet(adapter, skb);
		}
	}
	spin_lock_irqsave(&adapter->rx_proc_lock, flags);
	adapter->rx_processing = false;
	spin_unlock_irqrestore(&adapter->rx_proc_lock, flags);

exit_rx_proc:
	return 0;
}

/*
 * The main process.
 *
 * This function is the main procedure of the driver and handles various driver
 * operations. It runs in a loop and provides the core functionalities.
 *
 * The main responsibilities of this function are -
 *      - Ensure concurrency control
 *      - Handle pending interrupts and call interrupt handlers
 *      - Wake up the card if required
 *      - Handle command responses and call response handlers
 *      - Handle events and call event handlers
 *      - Execute pending commands
 *      - Transmit pending data packets
 */
int mwifiex_main_process(struct mwifiex_adapter *adapter)
{
	int ret = 0;
	unsigned long flags;

	spin_lock_irqsave(&adapter->main_proc_lock, flags);

	/* Check if already processing */
	if (adapter->mwifiex_processing || adapter->main_locked) {
		adapter->more_task_flag = true;
		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
		return 0;
	} else {
		adapter->mwifiex_processing = true;
		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
	}
process_start:
	do {
		if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
			break;

		/* For non-USB interfaces, If we process interrupts first, it
		 * would increase RX pending even further. Avoid this by
		 * checking if rx_pending has crossed high threshold and
		 * schedule rx work queue and then process interrupts.
		 * For USB interface, there are no interrupts. We already have
		 * HIGH_RX_PENDING check in usb.c
		 */
		if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING &&
		    adapter->iface_type != MWIFIEX_USB) {
			adapter->delay_main_work = true;
			mwifiex_queue_rx_work(adapter);
			break;
		}

		/* Handle pending interrupt if any */
		if (adapter->int_status) {
			if (adapter->hs_activated)
				mwifiex_process_hs_config(adapter);
			if (adapter->if_ops.process_int_status)
				adapter->if_ops.process_int_status(adapter);
		}

		if (adapter->rx_work_enabled && adapter->data_received)
			mwifiex_queue_rx_work(adapter);

		/* Need to wake up the card ? */
		if ((adapter->ps_state == PS_STATE_SLEEP) &&
		    (adapter->pm_wakeup_card_req &&
		     !adapter->pm_wakeup_fw_try) &&
		    (is_command_pending(adapter) ||
		     !skb_queue_empty(&adapter->tx_data_q) ||
		     !mwifiex_bypass_txlist_empty(adapter) ||
		     !mwifiex_wmm_lists_empty(adapter))) {
			adapter->pm_wakeup_fw_try = true;
			mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3));
			adapter->if_ops.wakeup(adapter);
			continue;
		}

		if (IS_CARD_RX_RCVD(adapter)) {
			adapter->data_received = false;
			adapter->pm_wakeup_fw_try = false;
			del_timer(&adapter->wakeup_timer);
			if (adapter->ps_state == PS_STATE_SLEEP)
				adapter->ps_state = PS_STATE_AWAKE;
		} else {
			/* We have tried to wakeup the card already */
			if (adapter->pm_wakeup_fw_try)
				break;
			if (adapter->ps_state == PS_STATE_PRE_SLEEP)
				mwifiex_check_ps_cond(adapter);

			if (adapter->ps_state != PS_STATE_AWAKE)
				break;
			if (adapter->tx_lock_flag) {
				if (adapter->iface_type == MWIFIEX_USB) {
					if (!adapter->usb_mc_setup)
						break;
				} else
					break;
			}

			if ((!adapter->scan_chan_gap_enabled &&
			     adapter->scan_processing) || adapter->data_sent ||
			     mwifiex_is_tdls_chan_switching
			     (mwifiex_get_priv(adapter,
					       MWIFIEX_BSS_ROLE_STA)) ||
			    (mwifiex_wmm_lists_empty(adapter) &&
			     mwifiex_bypass_txlist_empty(adapter) &&
			     skb_queue_empty(&adapter->tx_data_q))) {
				if (adapter->cmd_sent || adapter->curr_cmd ||
					!mwifiex_is_send_cmd_allowed
						(mwifiex_get_priv(adapter,
						MWIFIEX_BSS_ROLE_STA)) ||
				    (!is_command_pending(adapter)))
					break;
			}
		}

		/* Check for event */
		if (adapter->event_received) {
			adapter->event_received = false;
			mwifiex_process_event(adapter);
		}

		/* Check for Cmd Resp */
		if (adapter->cmd_resp_received) {
			adapter->cmd_resp_received = false;
			mwifiex_process_cmdresp(adapter);

			/* call mwifiex back when init_fw is done */
			if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
				adapter->hw_status = MWIFIEX_HW_STATUS_READY;
				mwifiex_init_fw_complete(adapter);
			}
		}

		/* Check if we need to confirm Sleep Request
		   received previously */
		if (adapter->ps_state == PS_STATE_PRE_SLEEP)
			mwifiex_check_ps_cond(adapter);

		/* * The ps_state may have been changed during processing of
		 * Sleep Request event.
		 */
		if ((adapter->ps_state == PS_STATE_SLEEP) ||
		    (adapter->ps_state == PS_STATE_PRE_SLEEP) ||
		    (adapter->ps_state == PS_STATE_SLEEP_CFM)) {
			continue;
		}

		if (adapter->tx_lock_flag) {
			if (adapter->iface_type == MWIFIEX_USB) {
				if (!adapter->usb_mc_setup)
					continue;
			} else
				continue;
		}

		if (!adapter->cmd_sent && !adapter->curr_cmd &&
		    mwifiex_is_send_cmd_allowed
		    (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
			if (mwifiex_exec_next_cmd(adapter) == -1) {
				ret = -1;
				break;
			}
		}

		/** If USB Multi channel setup ongoing,
		 *  wait for ready to tx data.
		 */
		if (adapter->iface_type == MWIFIEX_USB &&
		    adapter->usb_mc_setup)
			continue;

		if ((adapter->scan_chan_gap_enabled ||
		     !adapter->scan_processing) &&
		    !adapter->data_sent &&
		    !skb_queue_empty(&adapter->tx_data_q)) {
			mwifiex_process_tx_queue(adapter);
			if (adapter->hs_activated) {
				adapter->is_hs_configured = false;
				mwifiex_hs_activated_event
					(mwifiex_get_priv
					(adapter, MWIFIEX_BSS_ROLE_ANY),
					false);
			}
		}

		if ((adapter->scan_chan_gap_enabled ||
		     !adapter->scan_processing) &&
		    !adapter->data_sent &&
		    !mwifiex_bypass_txlist_empty(adapter) &&
		    !mwifiex_is_tdls_chan_switching
			(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
			mwifiex_process_bypass_tx(adapter);
			if (adapter->hs_activated) {
				adapter->is_hs_configured = false;
				mwifiex_hs_activated_event
					(mwifiex_get_priv
					 (adapter, MWIFIEX_BSS_ROLE_ANY),
					 false);
			}
		}

		if ((adapter->scan_chan_gap_enabled ||
		     !adapter->scan_processing) &&
		    !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) &&
		    !mwifiex_is_tdls_chan_switching
			(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) {
			mwifiex_wmm_process_tx(adapter);
			if (adapter->hs_activated) {
				adapter->is_hs_configured = false;
				mwifiex_hs_activated_event
					(mwifiex_get_priv
					 (adapter, MWIFIEX_BSS_ROLE_ANY),
					 false);
			}
		}

		if (adapter->delay_null_pkt && !adapter->cmd_sent &&
		    !adapter->curr_cmd && !is_command_pending(adapter) &&
		    (mwifiex_wmm_lists_empty(adapter) &&
		     mwifiex_bypass_txlist_empty(adapter) &&
		     skb_queue_empty(&adapter->tx_data_q))) {
			if (!mwifiex_send_null_packet
			    (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
			     MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
			     MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
				adapter->delay_null_pkt = false;
				adapter->ps_state = PS_STATE_SLEEP;
			}
			break;
		}
	} while (true);

	spin_lock_irqsave(&adapter->main_proc_lock, flags);
	if (adapter->more_task_flag) {
		adapter->more_task_flag = false;
		spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
		goto process_start;
	}
	adapter->mwifiex_processing = false;
	spin_unlock_irqrestore(&adapter->main_proc_lock, flags);

	return ret;
}
EXPORT_SYMBOL_GPL(mwifiex_main_process);

/*
 * This function frees the adapter structure.
 *
 * Additionally, this closes the netlink socket, frees the timers
 * and private structures.
 */
static void mwifiex_free_adapter(struct mwifiex_adapter *adapter)
{
	if (!adapter) {
		pr_err("%s: adapter is NULL\n", __func__);
		return;
	}

	mwifiex_unregister(adapter);
	pr_debug("info: %s: free adapter\n", __func__);
}

/*
 * This function cancels all works in the queue and destroys
 * the main workqueue.
 */
static void mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
{
	if (adapter->workqueue) {
		flush_workqueue(adapter->workqueue);
		destroy_workqueue(adapter->workqueue);
		adapter->workqueue = NULL;
	}

	if (adapter->rx_workqueue) {
		flush_workqueue(adapter->rx_workqueue);
		destroy_workqueue(adapter->rx_workqueue);
		adapter->rx_workqueue = NULL;
	}
}

/*
 * This function gets firmware and initializes it.
 *
 * The main initialization steps followed are -
 *      - Download the correct firmware to card
 *      - Issue the init commands to firmware
 */
static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
{
	int ret;
	char fmt[64];
	struct mwifiex_adapter *adapter = context;
	struct mwifiex_fw_image fw;
	bool init_failed = false;
	struct wireless_dev *wdev;
	struct completion *fw_done = adapter->fw_done;

	if (!firmware) {
		mwifiex_dbg(adapter, ERROR,
			    "Failed to get firmware %s\n", adapter->fw_name);
		goto err_dnld_fw;
	}

	memset(&fw, 0, sizeof(struct mwifiex_fw_image));
	adapter->firmware = firmware;
	fw.fw_buf = (u8 *) adapter->firmware->data;
	fw.fw_len = adapter->firmware->size;

	if (adapter->if_ops.dnld_fw) {
		ret = adapter->if_ops.dnld_fw(adapter, &fw);
	} else {
		ret = mwifiex_dnld_fw(adapter, &fw);
	}

	if (ret == -1)
		goto err_dnld_fw;

	mwifiex_dbg(adapter, MSG, "WLAN FW is active\n");

	if (cal_data_cfg) {
		if ((request_firmware(&adapter->cal_data, cal_data_cfg,
				      adapter->dev)) < 0)
			mwifiex_dbg(adapter, ERROR,
				    "Cal data request_firmware() failed\n");
	}

	/* enable host interrupt after fw dnld is successful */
	if (adapter->if_ops.enable_int) {
		if (adapter->if_ops.enable_int(adapter))
			goto err_dnld_fw;
	}

	adapter->init_wait_q_woken = false;
	ret = mwifiex_init_fw(adapter);
	if (ret == -1) {
		goto err_init_fw;
	} else if (!ret) {
		adapter->hw_status = MWIFIEX_HW_STATUS_READY;
		goto done;
	}
	/* Wait for mwifiex_init to complete */
	if (!adapter->mfg_mode) {
		wait_event_interruptible(adapter->init_wait_q,
					 adapter->init_wait_q_woken);
		if (adapter->hw_status != MWIFIEX_HW_STATUS_READY)
			goto err_init_fw;
	}

	if (!adapter->wiphy) {
		if (mwifiex_register_cfg80211(adapter)) {
			mwifiex_dbg(adapter, ERROR,
				    "cannot register with cfg80211\n");
			goto err_init_fw;
		}
	}

	if (mwifiex_init_channel_scan_gap(adapter)) {
		mwifiex_dbg(adapter, ERROR,
			    "could not init channel stats table\n");
		goto err_init_chan_scan;
	}

	if (driver_mode) {
		driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK;
		driver_mode |= MWIFIEX_DRIVER_MODE_STA;
	}

	rtnl_lock();
	/* Create station interface by default */
	wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM,
					NL80211_IFTYPE_STATION, NULL);
	if (IS_ERR(wdev)) {
		mwifiex_dbg(adapter, ERROR,
			    "cannot create default STA interface\n");
		rtnl_unlock();
		goto err_add_intf;
	}

	if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) {
		wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM,
						NL80211_IFTYPE_AP, NULL);
		if (IS_ERR(wdev)) {
			mwifiex_dbg(adapter, ERROR,
				    "cannot create AP interface\n");
			rtnl_unlock();
			goto err_add_intf;
		}
	}

	if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) {
		wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM,
						NL80211_IFTYPE_P2P_CLIENT, NULL);
		if (IS_ERR(wdev)) {
			mwifiex_dbg(adapter, ERROR,
				    "cannot create p2p client interface\n");
			rtnl_unlock();
			goto err_add_intf;
		}
	}
	rtnl_unlock();

	mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1);
	mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt);
	goto done;

err_add_intf:
	vfree(adapter->chan_stats);
err_init_chan_scan:
	wiphy_unregister(adapter->wiphy);
	wiphy_free(adapter->wiphy);
err_init_fw:
	if (adapter->if_ops.disable_int)
		adapter->if_ops.disable_int(adapter);
err_dnld_fw:
	mwifiex_dbg(adapter, ERROR,
		    "info: %s: unregister device\n", __func__);
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);

	adapter->surprise_removed = true;
	mwifiex_terminate_workqueue(adapter);

	if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
		pr_debug("info: %s: shutdown mwifiex\n", __func__);
		mwifiex_shutdown_drv(adapter);
		mwifiex_free_cmd_buffers(adapter);
	}

	init_failed = true;
done:
	if (adapter->cal_data) {
		release_firmware(adapter->cal_data);
		adapter->cal_data = NULL;
	}
	if (adapter->firmware) {
		release_firmware(adapter->firmware);
		adapter->firmware = NULL;
	}
	if (init_failed) {
		if (adapter->irq_wakeup >= 0)
			device_init_wakeup(adapter->dev, false);
		mwifiex_free_adapter(adapter);
	}
	/* Tell all current and future waiters we're finished */
	complete_all(fw_done);

	return init_failed ? -EIO : 0;
}

static void mwifiex_fw_dpc(const struct firmware *firmware, void *context)
{
	_mwifiex_fw_dpc(firmware, context);
}

/*
 * This function gets the firmware and (if called asynchronously) kicks off the
 * HW init when done.
 */
static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter,
			      bool req_fw_nowait)
{
	int ret;

	/* Override default firmware with manufacturing one if
	 * manufacturing mode is enabled
	 */
	if (mfg_mode) {
		if (strlcpy(adapter->fw_name, MFG_FIRMWARE,
			    sizeof(adapter->fw_name)) >=
			    sizeof(adapter->fw_name)) {
			pr_err("%s: fw_name too long!\n", __func__);
			return -1;
		}
	}

	if (req_fw_nowait) {
		ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name,
					      adapter->dev, GFP_KERNEL, adapter,
					      mwifiex_fw_dpc);
	} else {
		ret = request_firmware(&adapter->firmware,
				       adapter->fw_name,
				       adapter->dev);
	}

	if (ret < 0)
		mwifiex_dbg(adapter, ERROR, "request_firmware%s error %d\n",
			    req_fw_nowait ? "_nowait" : "", ret);
	return ret;
}

/*
 * CFG802.11 network device handler for open.
 *
 * Starts the data queue.
 */
static int
mwifiex_open(struct net_device *dev)
{
	netif_carrier_off(dev);

	return 0;
}

/*
 * CFG802.11 network device handler for close.
 */
static int
mwifiex_close(struct net_device *dev)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

	if (priv->scan_request) {
		struct cfg80211_scan_info info = {
			.aborted = true,
		};

		mwifiex_dbg(priv->adapter, INFO,
			    "aborting scan on ndo_stop\n");
		cfg80211_scan_done(priv->scan_request, &info);
		priv->scan_request = NULL;
		priv->scan_aborting = true;
	}

	if (priv->sched_scanning) {
		mwifiex_dbg(priv->adapter, INFO,
			    "aborting bgscan on ndo_stop\n");
		mwifiex_stop_bg_scan(priv);
		cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0);
	}

	return 0;
}

static bool
mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
			struct sk_buff *skb)
{
	struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;

	if (ntohs(eth_hdr->h_proto) == ETH_P_PAE ||
	    mwifiex_is_skb_mgmt_frame(skb) ||
	    (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
	     ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
	     (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
		mwifiex_dbg(priv->adapter, DATA,
			    "bypass txqueue; eth type %#x, mgmt %d\n",
			     ntohs(eth_hdr->h_proto),
			     mwifiex_is_skb_mgmt_frame(skb));
		return true;
	}

	return false;
}
/*
 * Add buffer into wmm tx queue and queue work to transmit it.
 */
int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb)
{
	struct netdev_queue *txq;
	int index = mwifiex_1d_to_wmm_queue[skb->priority];

	if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) {
		txq = netdev_get_tx_queue(priv->netdev, index);
		if (!netif_tx_queue_stopped(txq)) {
			netif_tx_stop_queue(txq);
			mwifiex_dbg(priv->adapter, DATA,
				    "stop queue: %d\n", index);
		}
	}

	if (mwifiex_bypass_tx_queue(priv, skb)) {
		atomic_inc(&priv->adapter->tx_pending);
		atomic_inc(&priv->adapter->bypass_tx_pending);
		mwifiex_wmm_add_buf_bypass_txqueue(priv, skb);
	 } else {
		atomic_inc(&priv->adapter->tx_pending);
		mwifiex_wmm_add_buf_txqueue(priv, skb);
	 }

	mwifiex_queue_main_work(priv->adapter);

	return 0;
}

struct sk_buff *
mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
				struct sk_buff *skb, u8 flag, u64 *cookie)
{
	struct sk_buff *orig_skb = skb;
	struct mwifiex_txinfo *tx_info, *orig_tx_info;

	skb = skb_clone(skb, GFP_ATOMIC);
	if (skb) {
		unsigned long flags;
		int id;

		spin_lock_irqsave(&priv->ack_status_lock, flags);
		id = idr_alloc(&priv->ack_status_frames, orig_skb,
			       1, 0x10, GFP_ATOMIC);
		spin_unlock_irqrestore(&priv->ack_status_lock, flags);

		if (id >= 0) {
			tx_info = MWIFIEX_SKB_TXCB(skb);
			tx_info->ack_frame_id = id;
			tx_info->flags |= flag;
			orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb);
			orig_tx_info->ack_frame_id = id;
			orig_tx_info->flags |= flag;

			if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie)
				orig_tx_info->cookie = *cookie;

		} else if (skb_shared(skb)) {
			kfree_skb(orig_skb);
		} else {
			kfree_skb(skb);
			skb = orig_skb;
		}
	} else {
		/* couldn't clone -- lose tx status ... */
		skb = orig_skb;
	}

	return skb;
}

/*
 * CFG802.11 network device handler for data transmission.
 */
static int
mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
	struct sk_buff *new_skb;
	struct mwifiex_txinfo *tx_info;
	bool multicast;

	mwifiex_dbg(priv->adapter, DATA,
		    "data: %lu BSS(%d-%d): Data <= kernel\n",
		    jiffies, priv->bss_type, priv->bss_num);

	if (priv->adapter->surprise_removed) {
		kfree_skb(skb);
		priv->stats.tx_dropped++;
		return 0;
	}
	if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "Tx: bad skb len %d\n", skb->len);
		kfree_skb(skb);
		priv->stats.tx_dropped++;
		return 0;
	}
	if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
		mwifiex_dbg(priv->adapter, DATA,
			    "data: Tx: insufficient skb headroom %d\n",
			    skb_headroom(skb));
		/* Insufficient skb headroom - allocate a new skb */
		new_skb =
			skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
		if (unlikely(!new_skb)) {
			mwifiex_dbg(priv->adapter, ERROR,
				    "Tx: cannot alloca new_skb\n");
			kfree_skb(skb);
			priv->stats.tx_dropped++;
			return 0;
		}
		kfree_skb(skb);
		skb = new_skb;
		mwifiex_dbg(priv->adapter, INFO,
			    "info: new skb headroomd %d\n",
			    skb_headroom(skb));
	}

	tx_info = MWIFIEX_SKB_TXCB(skb);
	memset(tx_info, 0, sizeof(*tx_info));
	tx_info->bss_num = priv->bss_num;
	tx_info->bss_type = priv->bss_type;
	tx_info->pkt_len = skb->len;

	multicast = is_multicast_ether_addr(skb->data);

	if (unlikely(!multicast && skb->sk &&
		     skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS &&
		     priv->adapter->fw_api_ver == MWIFIEX_FW_V15))
		skb = mwifiex_clone_skb_for_tx_status(priv,
						      skb,
					MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL);

	/* Record the current time the packet was queued; used to
	 * determine the amount of time the packet was queued in
	 * the driver before it was sent to the firmware.
	 * The delay is then sent along with the packet to the
	 * firmware for aggregate delay calculation for stats and
	 * MSDU lifetime expiry.
	 */
	__net_timestamp(skb);

	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
	    priv->bss_type == MWIFIEX_BSS_TYPE_STA &&
	    !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) {
		if (priv->adapter->auto_tdls && priv->check_tdls_tx)
			mwifiex_tdls_check_tx(priv, skb);
	}

	mwifiex_queue_tx_pkt(priv, skb);

	return 0;
}

int mwifiex_set_mac_address(struct mwifiex_private *priv,
			    struct net_device *dev)
{
	int ret;
	u64 mac_addr;

	if (priv->bss_type != MWIFIEX_BSS_TYPE_P2P)
		goto done;

	mac_addr = ether_addr_to_u64(priv->curr_addr);
	mac_addr |= BIT_ULL(MWIFIEX_MAC_LOCAL_ADMIN_BIT);
	u64_to_ether_addr(mac_addr, priv->curr_addr);

	/* Send request to firmware */
	ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
			       HostCmd_ACT_GEN_SET, 0, NULL, true);

	if (ret) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "set mac address failed: ret=%d\n", ret);
		return ret;
	}

done:
	memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
	return 0;
}

/* CFG802.11 network device handler for setting MAC address.
 */
static int
mwifiex_ndo_set_mac_address(struct net_device *dev, void *addr)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
	struct sockaddr *hw_addr = addr;

	memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
	return mwifiex_set_mac_address(priv, dev);
}

/*
 * CFG802.11 network device handler for setting multicast list.
 */
static void mwifiex_set_multicast_list(struct net_device *dev)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
	struct mwifiex_multicast_list mcast_list;

	if (dev->flags & IFF_PROMISC) {
		mcast_list.mode = MWIFIEX_PROMISC_MODE;
	} else if (dev->flags & IFF_ALLMULTI ||
		   netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
		mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
	} else {
		mcast_list.mode = MWIFIEX_MULTICAST_MODE;
		mcast_list.num_multicast_addr =
			mwifiex_copy_mcast_addr(&mcast_list, dev);
	}
	mwifiex_request_set_multicast_list(priv, &mcast_list);
}

/*
 * CFG802.11 network device handler for transmission timeout.
 */
static void
mwifiex_tx_timeout(struct net_device *dev)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

	priv->num_tx_timeout++;
	priv->tx_timeout_cnt++;
	mwifiex_dbg(priv->adapter, ERROR,
		    "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n",
		    jiffies, priv->tx_timeout_cnt, priv->bss_type,
		    priv->bss_num);
	mwifiex_set_trans_start(dev);

	if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD &&
	    priv->adapter->if_ops.card_reset) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "tx_timeout_cnt exceeds threshold.\t"
			    "Triggering card reset!\n");
		priv->adapter->if_ops.card_reset(priv->adapter);
	}
}

void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter)
{
	struct usb_card_rec *card = adapter->card;
	struct mwifiex_private *priv;
	u16 tx_buf_size;
	int i, ret;

	card->mc_resync_flag = true;
	for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
		if (atomic_read(&card->port[i].tx_data_urb_pending)) {
			mwifiex_dbg(adapter, WARN, "pending data urb in sys\n");
			return;
		}
	}

	card->mc_resync_flag = false;
	tx_buf_size = 0xffff;
	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
	ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
			       HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false);
	if (ret)
		mwifiex_dbg(adapter, ERROR,
			    "send reconfig tx buf size cmd err\n");
}
EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync);

void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
{
	/* Dump all the memory data into single file, a userspace script will
	 * be used to split all the memory data to multiple files
	 */
	mwifiex_dbg(adapter, MSG,
		    "== mwifiex dump information to /sys/class/devcoredump start\n");
	dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len,
		      GFP_KERNEL);
	mwifiex_dbg(adapter, MSG,
		    "== mwifiex dump information to /sys/class/devcoredump end\n");

	/* Device dump data will be freed in device coredump release function
	 * after 5 min. Here reset adapter->devdump_data and ->devdump_len
	 * to avoid it been accidentally reused.
	 */
	adapter->devdump_data = NULL;
	adapter->devdump_len = 0;
}
EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);

void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
{
	char *p;
	char drv_version[64];
	struct usb_card_rec *cardp;
	struct sdio_mmc_card *sdio_card;
	struct mwifiex_private *priv;
	int i, idx;
	struct netdev_queue *txq;
	struct mwifiex_debug_info *debug_info;

	mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n");

	p = adapter->devdump_data;
	strcpy(p, "========Start dump driverinfo========\n");
	p += strlen("========Start dump driverinfo========\n");
	p += sprintf(p, "driver_name = " "\"mwifiex\"\n");

	mwifiex_drv_get_driver_version(adapter, drv_version,
				       sizeof(drv_version) - 1);
	p += sprintf(p, "driver_version = %s\n", drv_version);

	if (adapter->iface_type == MWIFIEX_USB) {
		cardp = (struct usb_card_rec *)adapter->card;
		p += sprintf(p, "tx_cmd_urb_pending = %d\n",
			     atomic_read(&cardp->tx_cmd_urb_pending));
		p += sprintf(p, "tx_data_urb_pending_port_0 = %d\n",
			     atomic_read(&cardp->port[0].tx_data_urb_pending));
		p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n",
			     atomic_read(&cardp->port[1].tx_data_urb_pending));
		p += sprintf(p, "rx_cmd_urb_pending = %d\n",
			     atomic_read(&cardp->rx_cmd_urb_pending));
		p += sprintf(p, "rx_data_urb_pending = %d\n",
			     atomic_read(&cardp->rx_data_urb_pending));
	}

	p += sprintf(p, "tx_pending = %d\n",
		     atomic_read(&adapter->tx_pending));
	p += sprintf(p, "rx_pending = %d\n",
		     atomic_read(&adapter->rx_pending));

	if (adapter->iface_type == MWIFIEX_SDIO) {
		sdio_card = (struct sdio_mmc_card *)adapter->card;
		p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n",
			     sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port);
		p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n",
			     sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port);
	}

	for (i = 0; i < adapter->priv_num; i++) {
		if (!adapter->priv[i] || !adapter->priv[i]->netdev)
			continue;
		priv = adapter->priv[i];
		p += sprintf(p, "\n[interface  : \"%s\"]\n",
			     priv->netdev->name);
		p += sprintf(p, "wmm_tx_pending[0] = %d\n",
			     atomic_read(&priv->wmm_tx_pending[0]));
		p += sprintf(p, "wmm_tx_pending[1] = %d\n",
			     atomic_read(&priv->wmm_tx_pending[1]));
		p += sprintf(p, "wmm_tx_pending[2] = %d\n",
			     atomic_read(&priv->wmm_tx_pending[2]));
		p += sprintf(p, "wmm_tx_pending[3] = %d\n",
			     atomic_read(&priv->wmm_tx_pending[3]));
		p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ?
			     "Disconnected" : "Connected");
		p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev)
			     ? "on" : "off"));
		for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) {
			txq = netdev_get_tx_queue(priv->netdev, idx);
			p += sprintf(p, "tx queue %d:%s  ", idx,
				     netif_tx_queue_stopped(txq) ?
				     "stopped" : "started");
		}
		p += sprintf(p, "\n%s: num_tx_timeout = %d\n",
			     priv->netdev->name, priv->num_tx_timeout);
	}

	if (adapter->iface_type == MWIFIEX_SDIO ||
	    adapter->iface_type == MWIFIEX_PCIE) {
		p += sprintf(p, "\n=== %s register dump===\n",
			     adapter->iface_type == MWIFIEX_SDIO ?
							"SDIO" : "PCIE");
		if (adapter->if_ops.reg_dump)
			p += adapter->if_ops.reg_dump(adapter, p);
	}
	p += sprintf(p, "\n=== more debug information\n");
	debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL);
	if (debug_info) {
		for (i = 0; i < adapter->priv_num; i++) {
			if (!adapter->priv[i] || !adapter->priv[i]->netdev)
				continue;
			priv = adapter->priv[i];
			mwifiex_get_debug_info(priv, debug_info);
			p += mwifiex_debug_info_to_buffer(priv, p, debug_info);
			break;
		}
		kfree(debug_info);
	}

	strcpy(p, "\n========End dump========\n");
	p += strlen("\n========End dump========\n");
	mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n");
	adapter->devdump_len = p - (char *)adapter->devdump_data;
}
EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);

void mwifiex_prepare_fw_dump_info(struct mwifiex_adapter *adapter)
{
	u8 idx;
	char *fw_dump_ptr;
	u32 dump_len = 0;

	for (idx = 0; idx < adapter->num_mem_types; idx++) {
		struct memory_type_mapping *entry =
				&adapter->mem_type_mapping_tbl[idx];

		if (entry->mem_ptr) {
			dump_len += (strlen("========Start dump ") +
					strlen(entry->mem_name) +
					strlen("========\n") +
					(entry->mem_size + 1) +
					strlen("\n========End dump========\n"));
		}
	}

	if (dump_len + 1 + adapter->devdump_len > MWIFIEX_FW_DUMP_SIZE) {
		/* Realloc in case buffer overflow */
		fw_dump_ptr = vzalloc(dump_len + 1 + adapter->devdump_len);
		mwifiex_dbg(adapter, MSG, "Realloc device dump data.\n");
		if (!fw_dump_ptr) {
			vfree(adapter->devdump_data);
			mwifiex_dbg(adapter, ERROR,
				    "vzalloc devdump data failure!\n");
			return;
		}

		memmove(fw_dump_ptr, adapter->devdump_data,
			adapter->devdump_len);
		vfree(adapter->devdump_data);
		adapter->devdump_data = fw_dump_ptr;
	}

	fw_dump_ptr = (char *)adapter->devdump_data + adapter->devdump_len;

	for (idx = 0; idx < adapter->num_mem_types; idx++) {
		struct memory_type_mapping *entry =
					&adapter->mem_type_mapping_tbl[idx];

		if (entry->mem_ptr) {
			strcpy(fw_dump_ptr, "========Start dump ");
			fw_dump_ptr += strlen("========Start dump ");

			strcpy(fw_dump_ptr, entry->mem_name);
			fw_dump_ptr += strlen(entry->mem_name);

			strcpy(fw_dump_ptr, "========\n");
			fw_dump_ptr += strlen("========\n");

			memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
			fw_dump_ptr += entry->mem_size;

			strcpy(fw_dump_ptr, "\n========End dump========\n");
			fw_dump_ptr += strlen("\n========End dump========\n");
		}
	}

	adapter->devdump_len = fw_dump_ptr - (char *)adapter->devdump_data;

	for (idx = 0; idx < adapter->num_mem_types; idx++) {
		struct memory_type_mapping *entry =
			&adapter->mem_type_mapping_tbl[idx];

		vfree(entry->mem_ptr);
		entry->mem_ptr = NULL;
		entry->mem_size = 0;
	}
}
EXPORT_SYMBOL_GPL(mwifiex_prepare_fw_dump_info);

/*
 * CFG802.11 network device handler for statistics retrieval.
 */
static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
{
	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

	return &priv->stats;
}

static u16
mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb,
				void *accel_priv, select_queue_fallback_t fallback)
{
	skb->priority = cfg80211_classify8021d(skb, NULL);
	return mwifiex_1d_to_wmm_queue[skb->priority];
}

/* Network device handlers */
static const struct net_device_ops mwifiex_netdev_ops = {
	.ndo_open = mwifiex_open,
	.ndo_stop = mwifiex_close,
	.ndo_start_xmit = mwifiex_hard_start_xmit,
	.ndo_set_mac_address = mwifiex_ndo_set_mac_address,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_tx_timeout = mwifiex_tx_timeout,
	.ndo_get_stats = mwifiex_get_stats,
	.ndo_set_rx_mode = mwifiex_set_multicast_list,
	.ndo_select_queue = mwifiex_netdev_select_wmm_queue,
};

/*
 * This function initializes the private structure parameters.
 *
 * The following wait queues are initialized -
 *      - IOCTL wait queue
 *      - Command wait queue
 *      - Statistics wait queue
 *
 * ...and the following default parameters are set -
 *      - Current key index     : Set to 0
 *      - Rate index            : Set to auto
 *      - Media connected       : Set to disconnected
 *      - Adhoc link sensed     : Set to false
 *      - Nick name             : Set to null
 *      - Number of Tx timeout  : Set to 0
 *      - Device address        : Set to current address
 *      - Rx histogram statistc : Set to 0
 *
 * In addition, the CFG80211 work queue is also created.
 */
void mwifiex_init_priv_params(struct mwifiex_private *priv,
			      struct net_device *dev)
{
	dev->netdev_ops = &mwifiex_netdev_ops;
	dev->needs_free_netdev = true;
	/* Initialize private structure */
	priv->current_key_index = 0;
	priv->media_connected = false;
	memset(priv->mgmt_ie, 0,
	       sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX);
	priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK;
	priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK;
	priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK;
	priv->gen_idx = MWIFIEX_AUTO_IDX_MASK;
	priv->num_tx_timeout = 0;
	ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr);

	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
	    GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
		priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL);
		if (priv->hist_data)
			mwifiex_hist_data_reset(priv);
	}
}

/*
 * This function check if command is pending.
 */
int is_command_pending(struct mwifiex_adapter *adapter)
{
	unsigned long flags;
	int is_cmd_pend_q_empty;

	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
	is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);

	return !is_cmd_pend_q_empty;
}

/*
 * This is the RX work queue function.
 *
 * It handles the RX operations.
 */
static void mwifiex_rx_work_queue(struct work_struct *work)
{
	struct mwifiex_adapter *adapter =
		container_of(work, struct mwifiex_adapter, rx_work);

	if (adapter->surprise_removed)
		return;
	mwifiex_process_rx(adapter);
}

/*
 * This is the main work queue function.
 *
 * It handles the main process, which in turn handles the complete
 * driver operations.
 */
static void mwifiex_main_work_queue(struct work_struct *work)
{
	struct mwifiex_adapter *adapter =
		container_of(work, struct mwifiex_adapter, main_work);

	if (adapter->surprise_removed)
		return;
	mwifiex_main_process(adapter);
}

/* Common teardown code used for both device removal and reset */
static void mwifiex_uninit_sw(struct mwifiex_adapter *adapter)
{
	struct mwifiex_private *priv;
	int i;

	/* We can no longer handle interrupts once we start doing the teardown
	 * below.
	 */
	if (adapter->if_ops.disable_int)
		adapter->if_ops.disable_int(adapter);

	adapter->surprise_removed = true;
	mwifiex_terminate_workqueue(adapter);
	adapter->int_status = 0;

	/* Stop data */
	for (i = 0; i < adapter->priv_num; i++) {
		priv = adapter->priv[i];
		if (priv && priv->netdev) {
			mwifiex_stop_net_dev_queue(priv->netdev, adapter);
			if (netif_carrier_ok(priv->netdev))
				netif_carrier_off(priv->netdev);
			netif_device_detach(priv->netdev);
		}
	}

	mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n");
	mwifiex_shutdown_drv(adapter);
	mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n");

	if (atomic_read(&adapter->rx_pending) ||
	    atomic_read(&adapter->tx_pending) ||
	    atomic_read(&adapter->cmd_pending)) {
		mwifiex_dbg(adapter, ERROR,
			    "rx_pending=%d, tx_pending=%d,\t"
			    "cmd_pending=%d\n",
			    atomic_read(&adapter->rx_pending),
			    atomic_read(&adapter->tx_pending),
			    atomic_read(&adapter->cmd_pending));
	}

	for (i = 0; i < adapter->priv_num; i++) {
		priv = adapter->priv[i];
		if (!priv)
			continue;
		rtnl_lock();
		if (priv->netdev &&
		    priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
			mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
		rtnl_unlock();
	}

	wiphy_unregister(adapter->wiphy);
	wiphy_free(adapter->wiphy);
	adapter->wiphy = NULL;

	vfree(adapter->chan_stats);
	mwifiex_free_cmd_buffers(adapter);
}

/*
 * This function gets called during PCIe function level reset.
 */
int mwifiex_shutdown_sw(struct mwifiex_adapter *adapter)
{
	struct mwifiex_private *priv;

	if (!adapter)
		return 0;

	wait_for_completion(adapter->fw_done);
	/* Caller should ensure we aren't suspending while this happens */
	reinit_completion(adapter->fw_done);

	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
	mwifiex_deauthenticate(priv, NULL);

	mwifiex_uninit_sw(adapter);

	if (adapter->if_ops.down_dev)
		adapter->if_ops.down_dev(adapter);

	return 0;
}
EXPORT_SYMBOL_GPL(mwifiex_shutdown_sw);

/* This function gets called during PCIe function level reset. Required
 * code is extracted from mwifiex_add_card()
 */
int
mwifiex_reinit_sw(struct mwifiex_adapter *adapter)
{
	int ret;

	mwifiex_init_lock_list(adapter);
	if (adapter->if_ops.up_dev)
		adapter->if_ops.up_dev(adapter);

	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
	adapter->surprise_removed = false;
	init_waitqueue_head(&adapter->init_wait_q);
	adapter->is_suspended = false;
	adapter->hs_activated = false;
	adapter->is_cmd_timedout = 0;
	init_waitqueue_head(&adapter->hs_activate_wait_q);
	init_waitqueue_head(&adapter->cmd_wait_q.wait);
	adapter->cmd_wait_q.status = 0;
	adapter->scan_wait_q_woken = false;

	if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
		adapter->rx_work_enabled = true;

	adapter->workqueue =
		alloc_workqueue("MWIFIEX_WORK_QUEUE",
				WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
	if (!adapter->workqueue)
		goto err_kmalloc;

	INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);

	if (adapter->rx_work_enabled) {
		adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
							WQ_HIGHPRI |
							WQ_MEM_RECLAIM |
							WQ_UNBOUND, 1);
		if (!adapter->rx_workqueue)
			goto err_kmalloc;
		INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
	}

	/* Register the device. Fill up the private data structure with
	 * relevant information from the card. Some code extracted from
	 * mwifiex_register_dev()
	 */
	mwifiex_dbg(adapter, INFO, "%s, mwifiex_init_hw_fw()...\n", __func__);

	if (mwifiex_init_hw_fw(adapter, false)) {
		mwifiex_dbg(adapter, ERROR,
			    "%s: firmware init failed\n", __func__);
		goto err_init_fw;
	}

	/* _mwifiex_fw_dpc() does its own cleanup */
	ret = _mwifiex_fw_dpc(adapter->firmware, adapter);
	if (ret) {
		pr_err("Failed to bring up adapter: %d\n", ret);
		return ret;
	}
	mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);

	return 0;

err_init_fw:
	mwifiex_dbg(adapter, ERROR, "info: %s: unregister device\n", __func__);
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);

err_kmalloc:
	adapter->surprise_removed = true;
	mwifiex_terminate_workqueue(adapter);
	if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
		mwifiex_dbg(adapter, ERROR,
			    "info: %s: shutdown mwifiex\n", __func__);
		mwifiex_shutdown_drv(adapter);
		mwifiex_free_cmd_buffers(adapter);
	}

	complete_all(adapter->fw_done);
	mwifiex_dbg(adapter, INFO, "%s, error\n", __func__);

	return -1;
}
EXPORT_SYMBOL_GPL(mwifiex_reinit_sw);

static irqreturn_t mwifiex_irq_wakeup_handler(int irq, void *priv)
{
	struct mwifiex_adapter *adapter = priv;

	dev_dbg(adapter->dev, "%s: wake by wifi", __func__);
	adapter->wake_by_wifi = true;
	disable_irq_nosync(irq);

	/* Notify PM core we are wakeup source */
	pm_wakeup_event(adapter->dev, 0);
	pm_system_wakeup();

	return IRQ_HANDLED;
}

static void mwifiex_probe_of(struct mwifiex_adapter *adapter)
{
	int ret;
	struct device *dev = adapter->dev;

	if (!dev->of_node)
		goto err_exit;

	adapter->dt_node = dev->of_node;
	adapter->irq_wakeup = irq_of_parse_and_map(adapter->dt_node, 0);
	if (!adapter->irq_wakeup) {
		dev_dbg(dev, "fail to parse irq_wakeup from device tree\n");
		goto err_exit;
	}

	ret = devm_request_irq(dev, adapter->irq_wakeup,
			       mwifiex_irq_wakeup_handler, IRQF_TRIGGER_LOW,
			       "wifi_wake", adapter);
	if (ret) {
		dev_err(dev, "Failed to request irq_wakeup %d (%d)\n",
			adapter->irq_wakeup, ret);
		goto err_exit;
	}

	disable_irq(adapter->irq_wakeup);
	if (device_init_wakeup(dev, true)) {
		dev_err(dev, "fail to init wakeup for mwifiex\n");
		goto err_exit;
	}
	return;

err_exit:
	adapter->irq_wakeup = -1;
}

/*
 * This function adds the card.
 *
 * This function follows the following major steps to set up the device -
 *      - Initialize software. This includes probing the card, registering
 *        the interface operations table, and allocating/initializing the
 *        adapter structure
 *      - Set up the netlink socket
 *      - Create and start the main work queue
 *      - Register the device
 *      - Initialize firmware and hardware
 *      - Add logical interfaces
 */
int
mwifiex_add_card(void *card, struct completion *fw_done,
		 struct mwifiex_if_ops *if_ops, u8 iface_type,
		 struct device *dev)
{
	struct mwifiex_adapter *adapter;

	if (mwifiex_register(card, dev, if_ops, (void **)&adapter)) {
		pr_err("%s: software init failed\n", __func__);
		goto err_init_sw;
	}

	mwifiex_probe_of(adapter);

	adapter->iface_type = iface_type;
	adapter->fw_done = fw_done;

	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
	adapter->surprise_removed = false;
	init_waitqueue_head(&adapter->init_wait_q);
	adapter->is_suspended = false;
	adapter->hs_activated = false;
	init_waitqueue_head(&adapter->hs_activate_wait_q);
	init_waitqueue_head(&adapter->cmd_wait_q.wait);
	adapter->cmd_wait_q.status = 0;
	adapter->scan_wait_q_woken = false;

	if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB)
		adapter->rx_work_enabled = true;

	adapter->workqueue =
		alloc_workqueue("MWIFIEX_WORK_QUEUE",
				WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
	if (!adapter->workqueue)
		goto err_kmalloc;

	INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);

	if (adapter->rx_work_enabled) {
		adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE",
							WQ_HIGHPRI |
							WQ_MEM_RECLAIM |
							WQ_UNBOUND, 1);
		if (!adapter->rx_workqueue)
			goto err_kmalloc;

		INIT_WORK(&adapter->rx_work, mwifiex_rx_work_queue);
	}

	/* Register the device. Fill up the private data structure with relevant
	   information from the card. */
	if (adapter->if_ops.register_dev(adapter)) {
		pr_err("%s: failed to register mwifiex device\n", __func__);
		goto err_registerdev;
	}

	if (mwifiex_init_hw_fw(adapter, true)) {
		pr_err("%s: firmware init failed\n", __func__);
		goto err_init_fw;
	}

	return 0;

err_init_fw:
	pr_debug("info: %s: unregister device\n", __func__);
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);
err_registerdev:
	adapter->surprise_removed = true;
	mwifiex_terminate_workqueue(adapter);
	if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) {
		pr_debug("info: %s: shutdown mwifiex\n", __func__);
		mwifiex_shutdown_drv(adapter);
		mwifiex_free_cmd_buffers(adapter);
	}
err_kmalloc:
	if (adapter->irq_wakeup >= 0)
		device_init_wakeup(adapter->dev, false);
	mwifiex_free_adapter(adapter);

err_init_sw:

	return -1;
}
EXPORT_SYMBOL_GPL(mwifiex_add_card);

/*
 * This function removes the card.
 *
 * This function follows the following major steps to remove the device -
 *      - Stop data traffic
 *      - Shutdown firmware
 *      - Remove the logical interfaces
 *      - Terminate the work queue
 *      - Unregister the device
 *      - Free the adapter structure
 */
int mwifiex_remove_card(struct mwifiex_adapter *adapter)
{
	if (!adapter)
		return 0;

	mwifiex_uninit_sw(adapter);

	if (adapter->irq_wakeup >= 0)
		device_init_wakeup(adapter->dev, false);

	/* Unregister device */
	mwifiex_dbg(adapter, INFO,
		    "info: unregister device\n");
	if (adapter->if_ops.unregister_dev)
		adapter->if_ops.unregister_dev(adapter);
	/* Free adapter structure */
	mwifiex_dbg(adapter, INFO,
		    "info: free adapter\n");
	mwifiex_free_adapter(adapter);

	return 0;
}
EXPORT_SYMBOL_GPL(mwifiex_remove_card);

void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask,
		  const char *fmt, ...)
{
	struct va_format vaf;
	va_list args;

	if (!(adapter->debug_mask & mask))
		return;

	va_start(args, fmt);

	vaf.fmt = fmt;
	vaf.va = &args;

	if (adapter->dev)
		dev_info(adapter->dev, "%pV", &vaf);
	else
		pr_info("%pV", &vaf);

	va_end(args);
}
EXPORT_SYMBOL_GPL(_mwifiex_dbg);

/*
 * This function initializes the module.
 *
 * The debug FS is also initialized if configured.
 */
static int
mwifiex_init_module(void)
{
#ifdef CONFIG_DEBUG_FS
	mwifiex_debugfs_init();
#endif
	return 0;
}

/*
 * This function cleans up the module.
 *
 * The debug FS is removed if available.
 */
static void
mwifiex_cleanup_module(void)
{
#ifdef CONFIG_DEBUG_FS
	mwifiex_debugfs_remove();
#endif
}

module_init(mwifiex_init_module);
module_exit(mwifiex_cleanup_module);

MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL v2");