summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath6kl/main.c
blob: 30b5a53db9ed061dd6ba60a790a7ccde0ba8fc23 (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
/*
 * Copyright (c) 2004-2011 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "core.h"
#include "hif-ops.h"
#include "cfg80211.h"
#include "target.h"
#include "debug.h"

struct ath6kl_sta *ath6kl_find_sta(struct ath6kl *ar, u8 *node_addr)
{
	struct ath6kl_sta *conn = NULL;
	u8 i, max_conn;

	max_conn = (ar->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;

	for (i = 0; i < max_conn; i++) {
		if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
			conn = &ar->sta_list[i];
			break;
		}
	}

	return conn;
}

struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
{
	struct ath6kl_sta *conn = NULL;
	u8 ctr;

	for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
		if (ar->sta_list[ctr].aid == aid) {
			conn = &ar->sta_list[ctr];
			break;
		}
	}
	return conn;
}

static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie,
			u8 ielen, u8 keymgmt, u8 ucipher, u8 auth)
{
	struct ath6kl_sta *sta;
	u8 free_slot;

	free_slot = aid - 1;

	sta = &ar->sta_list[free_slot];
	memcpy(sta->mac, mac, ETH_ALEN);
	if (ielen <= ATH6KL_MAX_IE)
		memcpy(sta->wpa_ie, wpaie, ielen);
	sta->aid = aid;
	sta->keymgmt = keymgmt;
	sta->ucipher = ucipher;
	sta->auth = auth;

	ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
	ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
}

static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
{
	struct ath6kl_sta *sta = &ar->sta_list[i];

	/* empty the queued pkts in the PS queue if any */
	spin_lock_bh(&sta->psq_lock);
	skb_queue_purge(&sta->psq);
	spin_unlock_bh(&sta->psq_lock);

	memset(&ar->ap_stats.sta[sta->aid - 1], 0,
	       sizeof(struct wmi_per_sta_stat));
	memset(sta->mac, 0, ETH_ALEN);
	memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
	sta->aid = 0;
	sta->sta_flags = 0;

	ar->sta_list_index = ar->sta_list_index & ~(1 << i);

}

static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
{
	u8 i, removed = 0;

	if (is_zero_ether_addr(mac))
		return removed;

	if (is_broadcast_ether_addr(mac)) {
		ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");

		for (i = 0; i < AP_MAX_NUM_STA; i++) {
			if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
				ath6kl_sta_cleanup(ar, i);
				removed = 1;
			}
		}
	} else {
		for (i = 0; i < AP_MAX_NUM_STA; i++) {
			if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
				ath6kl_dbg(ATH6KL_DBG_TRC,
					   "deleting station %pM aid=%d reason=%d\n",
					   mac, ar->sta_list[i].aid, reason);
				ath6kl_sta_cleanup(ar, i);
				removed = 1;
				break;
			}
		}
	}

	return removed;
}

enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
{
	struct ath6kl *ar = devt;
	return ar->ac2ep_map[ac];
}

struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
{
	struct ath6kl_cookie *cookie;

	cookie = ar->cookie_list;
	if (cookie != NULL) {
		ar->cookie_list = cookie->arc_list_next;
		ar->cookie_count--;
	}

	return cookie;
}

void ath6kl_cookie_init(struct ath6kl *ar)
{
	u32 i;

	ar->cookie_list = NULL;
	ar->cookie_count = 0;

	memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));

	for (i = 0; i < MAX_COOKIE_NUM; i++)
		ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
}

void ath6kl_cookie_cleanup(struct ath6kl *ar)
{
	ar->cookie_list = NULL;
	ar->cookie_count = 0;
}

void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
{
	/* Insert first */

	if (!ar || !cookie)
		return;

	cookie->arc_list_next = ar->cookie_list;
	ar->cookie_list = cookie;
	ar->cookie_count++;
}

/* set the window address register (using 4-byte register access ). */
static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr)
{
	int status;
	s32 i;
	__le32 addr_val;

	/*
	 * Write bytes 1,2,3 of the register to set the upper address bytes,
	 * the LSB is written last to initiate the access cycle
	 */

	for (i = 1; i <= 3; i++) {
		/*
		 * Fill the buffer with the address byte value we want to
		 * hit 4 times. No need to worry about endianness as the
		 * same byte is copied to all four bytes of addr_val at
		 * any time.
		 */
		memset((u8 *)&addr_val, ((u8 *)&addr)[i], 4);

		/*
		 * Hit each byte of the register address with a 4-byte
		 * write operation to the same address, this is a harmless
		 * operation.
		 */
		status = hif_read_write_sync(ar, reg_addr + i, (u8 *)&addr_val,
					     4, HIF_WR_SYNC_BYTE_FIX);
		if (status)
			break;
	}

	if (status) {
		ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n",
			   addr, reg_addr);
		return status;
	}

	/*
	 * Write the address register again, this time write the whole
	 * 4-byte value. The effect here is that the LSB write causes the
	 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no
	 * effect since we are writing the same values again
	 */
	addr_val = cpu_to_le32(addr);
	status = hif_read_write_sync(ar, reg_addr,
				     (u8 *)&(addr_val),
				     4, HIF_WR_SYNC_BYTE_INC);

	if (status) {
		ath6kl_err("failed to write 0x%x to window reg: 0x%X\n",
			   addr, reg_addr);
		return status;
	}

	return 0;
}

/*
 * Read from the hardware through its diagnostic window. No cooperation
 * from the firmware is required for this.
 */
int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
{
	int ret;

	/* set window register to start read cycle */
	ret = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, address);
	if (ret)
		return ret;

	/* read the data */
	ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) value,
				  sizeof(*value), HIF_RD_SYNC_BYTE_INC);
	if (ret) {
		ath6kl_warn("failed to read32 through diagnose window: %d\n",
			    ret);
		return ret;
	}

	return 0;
}

/*
 * Write to the ATH6KL through its diagnostic window. No cooperation from
 * the Target is required for this.
 */
int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
{
	int ret;

	/* set write data */
	ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) &value,
				  sizeof(value), HIF_WR_SYNC_BYTE_INC);
	if (ret) {
		ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n",
			   address, value);
		return ret;
	}

	/* set window register, which starts the write cycle */
	return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS,
				      address);
}

int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
{
	u32 count, *buf = data;
	int ret;

	if (WARN_ON(length % 4))
		return -EINVAL;

	for (count = 0; count < length / 4; count++, address += 4) {
		ret = ath6kl_diag_read32(ar, address, &buf[count]);
		if (ret)
			return ret;
	}

	return 0;
}

int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
{
	u32 count;
	__le32 *buf = data;
	int ret;

	if (WARN_ON(length % 4))
		return -EINVAL;

	for (count = 0; count < length / 4; count++, address += 4) {
		ret = ath6kl_diag_write32(ar, address, buf[count]);
		if (ret)
			return ret;
	}

	return 0;
}

int ath6kl_read_fwlogs(struct ath6kl *ar)
{
	struct ath6kl_dbglog_hdr debug_hdr;
	struct ath6kl_dbglog_buf debug_buf;
	u32 address, length, dropped, firstbuf, debug_hdr_addr;
	int ret = 0, loop;
	u8 *buf;

	buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	address = TARG_VTOP(ar->target_type,
			    ath6kl_get_hi_item_addr(ar,
						    HI_ITEM(hi_dbglog_hdr)));

	ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
	if (ret)
		goto out;

	/* Get the contents of the ring buffer */
	if (debug_hdr_addr == 0) {
		ath6kl_warn("Invalid address for debug_hdr_addr\n");
		ret = -EINVAL;
		goto out;
	}

	address = TARG_VTOP(ar->target_type, debug_hdr_addr);
	ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));

	address = TARG_VTOP(ar->target_type,
			    le32_to_cpu(debug_hdr.dbuf_addr));
	firstbuf = address;
	dropped = le32_to_cpu(debug_hdr.dropped);
	ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));

	loop = 100;

	do {
		address = TARG_VTOP(ar->target_type,
				    le32_to_cpu(debug_buf.buffer_addr));
		length = le32_to_cpu(debug_buf.length);

		if (length != 0 && (le32_to_cpu(debug_buf.length) <=
				    le32_to_cpu(debug_buf.bufsize))) {
			length = ALIGN(length, 4);

			ret = ath6kl_diag_read(ar, address,
					       buf, length);
			if (ret)
				goto out;

			ath6kl_debug_fwlog_event(ar, buf, length);
		}

		address = TARG_VTOP(ar->target_type,
				    le32_to_cpu(debug_buf.next));
		ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
		if (ret)
			goto out;

		loop--;

		if (WARN_ON(loop == 0)) {
			ret = -ETIMEDOUT;
			goto out;
		}
	} while (address != firstbuf);

out:
	kfree(buf);

	return ret;
}

/* FIXME: move to a better place, target.h? */
#define AR6003_RESET_CONTROL_ADDRESS 0x00004000
#define AR6004_RESET_CONTROL_ADDRESS 0x00004000

static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type,
				bool wait_fot_compltn, bool cold_reset)
{
	int status = 0;
	u32 address;
	__le32 data;

	if (target_type != TARGET_TYPE_AR6003 &&
		target_type != TARGET_TYPE_AR6004)
		return;

	data = cold_reset ? cpu_to_le32(RESET_CONTROL_COLD_RST) :
			    cpu_to_le32(RESET_CONTROL_MBOX_RST);

	switch (target_type) {
	case TARGET_TYPE_AR6003:
		address = AR6003_RESET_CONTROL_ADDRESS;
		break;
	case TARGET_TYPE_AR6004:
		address = AR6004_RESET_CONTROL_ADDRESS;
		break;
	default:
		address = AR6003_RESET_CONTROL_ADDRESS;
		break;
	}

	status = ath6kl_diag_write32(ar, address, data);

	if (status)
		ath6kl_err("failed to reset target\n");
}

void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile,
			  bool get_dbglogs)
{
	struct ath6kl *ar = ath6kl_priv(dev);
	static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	bool discon_issued;

	netif_stop_queue(dev);

	/* disable the target and the interrupts associated with it */
	if (test_bit(WMI_READY, &ar->flag)) {
		discon_issued = (test_bit(CONNECTED, &ar->flag) ||
				 test_bit(CONNECT_PEND, &ar->flag));
		ath6kl_disconnect(ar);
		if (!keep_profile)
			ath6kl_init_profile_info(ar);

		del_timer(&ar->disconnect_timer);

		clear_bit(WMI_READY, &ar->flag);
		ath6kl_wmi_shutdown(ar->wmi);
		clear_bit(WMI_ENABLED, &ar->flag);
		ar->wmi = NULL;

		/*
		 * After wmi_shudown all WMI events will be dropped. We
		 * need to cleanup the buffers allocated in AP mode and
		 * give disconnect notification to stack, which usually
		 * happens in the disconnect_event. Simulate the disconnect
		 * event by calling the function directly. Sometimes
		 * disconnect_event will be received when the debug logs
		 * are collected.
		 */
		if (discon_issued)
			ath6kl_disconnect_event(ar, DISCONNECT_CMD,
						(ar->nw_type & AP_NETWORK) ?
						bcast_mac : ar->bssid,
						0, NULL, 0);

		ar->user_key_ctrl = 0;

	} else {
		ath6kl_dbg(ATH6KL_DBG_TRC,
			   "%s: wmi is not ready 0x%p 0x%p\n",
			   __func__, ar, ar->wmi);

		/* Shut down WMI if we have started it */
		if (test_bit(WMI_ENABLED, &ar->flag)) {
			ath6kl_dbg(ATH6KL_DBG_TRC,
				   "%s: shut down wmi\n", __func__);
			ath6kl_wmi_shutdown(ar->wmi);
			clear_bit(WMI_ENABLED, &ar->flag);
			ar->wmi = NULL;
		}
	}

	if (ar->htc_target) {
		ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__);
		ath6kl_htc_stop(ar->htc_target);
	}

	/*
	 * Try to reset the device if we can. The driver may have been
	 * configure NOT to reset the target during a debug session.
	 */
	ath6kl_dbg(ATH6KL_DBG_TRC,
		   "attempting to reset target on instance destroy\n");
	ath6kl_reset_device(ar, ar->target_type, true, true);
}

static void ath6kl_install_static_wep_keys(struct ath6kl *ar)
{
	u8 index;
	u8 keyusage;

	for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) {
		if (ar->wep_key_list[index].key_len) {
			keyusage = GROUP_USAGE;
			if (index == ar->def_txkey_index)
				keyusage |= TX_USAGE;

			ath6kl_wmi_addkey_cmd(ar->wmi,
					      index,
					      WEP_CRYPT,
					      keyusage,
					      ar->wep_key_list[index].key_len,
					      NULL,
					      ar->wep_key_list[index].key,
					      KEY_OP_INIT_VAL, NULL,
					      NO_SYNC_WMIFLAG);
		}
	}
}

void ath6kl_connect_ap_mode_bss(struct ath6kl *ar, u16 channel)
{
	struct ath6kl_req_key *ik;
	int res;
	u8 key_rsc[ATH6KL_KEY_SEQ_LEN];

	ik = &ar->ap_mode_bkey;

	ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);

	switch (ar->auth_mode) {
	case NONE_AUTH:
		if (ar->prwise_crypto == WEP_CRYPT)
			ath6kl_install_static_wep_keys(ar);
		break;
	case WPA_PSK_AUTH:
	case WPA2_PSK_AUTH:
	case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
		if (!ik->valid)
			break;

		ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed addkey for "
			   "the initial group key for AP mode\n");
		memset(key_rsc, 0, sizeof(key_rsc));
		res = ath6kl_wmi_addkey_cmd(
			ar->wmi, ik->key_index, ik->key_type,
			GROUP_USAGE, ik->key_len, key_rsc, ik->key,
			KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
		if (res) {
			ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed "
				   "addkey failed: %d\n", res);
		}
		break;
	}

	ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
	set_bit(CONNECTED, &ar->flag);
	netif_carrier_on(ar->net_dev);
}

void ath6kl_connect_ap_mode_sta(struct ath6kl *ar, u16 aid, u8 *mac_addr,
				u8 keymgmt, u8 ucipher, u8 auth,
				u8 assoc_req_len, u8 *assoc_info)
{
	u8 *ies = NULL, *wpa_ie = NULL, *pos;
	size_t ies_len = 0;
	struct station_info sinfo;

	ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);

	if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
		struct ieee80211_mgmt *mgmt =
			(struct ieee80211_mgmt *) assoc_info;
		if (ieee80211_is_assoc_req(mgmt->frame_control) &&
		    assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
		    sizeof(mgmt->u.assoc_req)) {
			ies = mgmt->u.assoc_req.variable;
			ies_len = assoc_info + assoc_req_len - ies;
		} else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
			   assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
			   + sizeof(mgmt->u.reassoc_req)) {
			ies = mgmt->u.reassoc_req.variable;
			ies_len = assoc_info + assoc_req_len - ies;
		}
	}

	pos = ies;
	while (pos && pos + 1 < ies + ies_len) {
		if (pos + 2 + pos[1] > ies + ies_len)
			break;
		if (pos[0] == WLAN_EID_RSN)
			wpa_ie = pos; /* RSN IE */
		else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
			 pos[1] >= 4 &&
			 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
			if (pos[5] == 0x01)
				wpa_ie = pos; /* WPA IE */
			else if (pos[5] == 0x04) {
				wpa_ie = pos; /* WPS IE */
				break; /* overrides WPA/RSN IE */
			}
		}
		pos += 2 + pos[1];
	}

	ath6kl_add_new_sta(ar, mac_addr, aid, wpa_ie,
			   wpa_ie ? 2 + wpa_ie[1] : 0,
			   keymgmt, ucipher, auth);

	/* send event to application */
	memset(&sinfo, 0, sizeof(sinfo));

	/* TODO: sinfo.generation */

	sinfo.assoc_req_ies = ies;
	sinfo.assoc_req_ies_len = ies_len;
	sinfo.filled |= STATION_INFO_ASSOC_REQ_IES;

	cfg80211_new_sta(ar->net_dev, mac_addr, &sinfo, GFP_KERNEL);

	netif_wake_queue(ar->net_dev);
}

/* Functions for Tx credit handling */
void ath6k_credit_init(struct htc_credit_state_info *cred_info,
		       struct list_head *ep_list,
		       int tot_credits)
{
	struct htc_endpoint_credit_dist *cur_ep_dist;
	int count;

	cred_info->cur_free_credits = tot_credits;
	cred_info->total_avail_credits = tot_credits;

	list_for_each_entry(cur_ep_dist, ep_list, list) {
		if (cur_ep_dist->endpoint == ENDPOINT_0)
			continue;

		cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;

		if (tot_credits > 4)
			if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
			    (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
				ath6kl_deposit_credit_to_ep(cred_info,
						cur_ep_dist,
						cur_ep_dist->cred_min);
				cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
			}

		if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
			ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
						    cur_ep_dist->cred_min);
			/*
			 * Control service is always marked active, it
			 * never goes inactive EVER.
			 */
			cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
		} else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
			/* this is the lowest priority data endpoint */
			cred_info->lowestpri_ep_dist = cur_ep_dist->list;

		/*
		 * Streams have to be created (explicit | implicit) for all
		 * kinds of traffic. BE endpoints are also inactive in the
		 * beginning. When BE traffic starts it creates implicit
		 * streams that redistributes credits.
		 *
		 * Note: all other endpoints have minimums set but are
		 * initially given NO credits. credits will be distributed
		 * as traffic activity demands
		 */
	}

	WARN_ON(cred_info->cur_free_credits <= 0);

	list_for_each_entry(cur_ep_dist, ep_list, list) {
		if (cur_ep_dist->endpoint == ENDPOINT_0)
			continue;

		if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
			cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
		else {
			/*
			 * For the remaining data endpoints, we assume that
			 * each cred_per_msg are the same. We use a simple
			 * calculation here, we take the remaining credits
			 * and determine how many max messages this can
			 * cover and then set each endpoint's normal value
			 * equal to 3/4 this amount.
			 */
			count = (cred_info->cur_free_credits /
				 cur_ep_dist->cred_per_msg)
				* cur_ep_dist->cred_per_msg;
			count = (count * 3) >> 2;
			count = max(count, cur_ep_dist->cred_per_msg);
			cur_ep_dist->cred_norm = count;

		}
	}
}

/* initialize and setup credit distribution */
int ath6k_setup_credit_dist(void *htc_handle,
			    struct htc_credit_state_info *cred_info)
{
	u16 servicepriority[5];

	memset(cred_info, 0, sizeof(struct htc_credit_state_info));

	servicepriority[0] = WMI_CONTROL_SVC;  /* highest */
	servicepriority[1] = WMI_DATA_VO_SVC;
	servicepriority[2] = WMI_DATA_VI_SVC;
	servicepriority[3] = WMI_DATA_BE_SVC;
	servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */

	/* set priority list */
	ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);

	return 0;
}

/* reduce an ep's credits back to a set limit */
static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info,
				 struct htc_endpoint_credit_dist  *ep_dist,
				 int limit)
{
	int credits;

	ep_dist->cred_assngd = limit;

	if (ep_dist->credits <= limit)
		return;

	credits = ep_dist->credits - limit;
	ep_dist->credits -= credits;
	cred_info->cur_free_credits += credits;
}

static void ath6k_credit_update(struct htc_credit_state_info *cred_info,
				struct list_head *epdist_list)
{
	struct htc_endpoint_credit_dist *cur_dist_list;

	list_for_each_entry(cur_dist_list, epdist_list, list) {
		if (cur_dist_list->endpoint == ENDPOINT_0)
			continue;

		if (cur_dist_list->cred_to_dist > 0) {
			cur_dist_list->credits +=
					cur_dist_list->cred_to_dist;
			cur_dist_list->cred_to_dist = 0;
			if (cur_dist_list->credits >
			    cur_dist_list->cred_assngd)
				ath6k_reduce_credits(cred_info,
						cur_dist_list,
						cur_dist_list->cred_assngd);

			if (cur_dist_list->credits >
			    cur_dist_list->cred_norm)
				ath6k_reduce_credits(cred_info, cur_dist_list,
						     cur_dist_list->cred_norm);

			if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
				if (cur_dist_list->txq_depth == 0)
					ath6k_reduce_credits(cred_info,
							     cur_dist_list, 0);
			}
		}
	}
}

/*
 * HTC has an endpoint that needs credits, ep_dist is the endpoint in
 * question.
 */
void ath6k_seek_credits(struct htc_credit_state_info *cred_info,
			struct htc_endpoint_credit_dist *ep_dist)
{
	struct htc_endpoint_credit_dist *curdist_list;
	int credits = 0;
	int need;

	if (ep_dist->svc_id == WMI_CONTROL_SVC)
		goto out;

	if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
	    (ep_dist->svc_id == WMI_DATA_VO_SVC))
		if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
			goto out;

	/*
	 * For all other services, we follow a simple algorithm of:
	 *
	 * 1. checking the free pool for credits
	 * 2. checking lower priority endpoints for credits to take
	 */

	credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);

	if (credits >= ep_dist->seek_cred)
		goto out;

	/*
	 * We don't have enough in the free pool, try taking away from
	 * lower priority services The rule for taking away credits:
	 *
	 *   1. Only take from lower priority endpoints
	 *   2. Only take what is allocated above the minimum (never
	 *      starve an endpoint completely)
	 *   3. Only take what you need.
	 */

	list_for_each_entry_reverse(curdist_list,
				    &cred_info->lowestpri_ep_dist,
				    list) {
		if (curdist_list == ep_dist)
			break;

		need = ep_dist->seek_cred - cred_info->cur_free_credits;

		if ((curdist_list->cred_assngd - need) >=
		     curdist_list->cred_min) {
			/*
			 * The current one has been allocated more than
			 * it's minimum and it has enough credits assigned
			 * above it's minimum to fulfill our need try to
			 * take away just enough to fulfill our need.
			 */
			ath6k_reduce_credits(cred_info, curdist_list,
					curdist_list->cred_assngd - need);

			if (cred_info->cur_free_credits >=
			    ep_dist->seek_cred)
				break;
		}

		if (curdist_list->endpoint == ENDPOINT_0)
			break;
	}

	credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);

out:
	/* did we find some credits? */
	if (credits)
		ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);

	ep_dist->seek_cred = 0;
}

/* redistribute credits based on activity change */
static void ath6k_redistribute_credits(struct htc_credit_state_info *info,
				       struct list_head *ep_dist_list)
{
	struct htc_endpoint_credit_dist *curdist_list;

	list_for_each_entry(curdist_list, ep_dist_list, list) {
		if (curdist_list->endpoint == ENDPOINT_0)
			continue;

		if ((curdist_list->svc_id == WMI_DATA_BK_SVC)  ||
		    (curdist_list->svc_id == WMI_DATA_BE_SVC))
			curdist_list->dist_flags |= HTC_EP_ACTIVE;

		if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
		    !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
			if (curdist_list->txq_depth == 0)
				ath6k_reduce_credits(info,
						curdist_list, 0);
			else
				ath6k_reduce_credits(info,
						curdist_list,
						curdist_list->cred_min);
		}
	}
}

/*
 *
 * This function is invoked whenever endpoints require credit
 * distributions. A lock is held while this function is invoked, this
 * function shall NOT block. The ep_dist_list is a list of distribution
 * structures in prioritized order as defined by the call to the
 * htc_set_credit_dist() api.
 */
void ath6k_credit_distribute(struct htc_credit_state_info *cred_info,
			     struct list_head *ep_dist_list,
			     enum htc_credit_dist_reason reason)
{
	switch (reason) {
	case HTC_CREDIT_DIST_SEND_COMPLETE:
		ath6k_credit_update(cred_info, ep_dist_list);
		break;
	case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
		ath6k_redistribute_credits(cred_info, ep_dist_list);
		break;
	default:
		break;
	}

	WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
	WARN_ON(cred_info->cur_free_credits < 0);
}

void disconnect_timer_handler(unsigned long ptr)
{
	struct net_device *dev = (struct net_device *)ptr;
	struct ath6kl *ar = ath6kl_priv(dev);

	ath6kl_init_profile_info(ar);
	ath6kl_disconnect(ar);
}

void ath6kl_disconnect(struct ath6kl *ar)
{
	if (test_bit(CONNECTED, &ar->flag) ||
	    test_bit(CONNECT_PEND, &ar->flag)) {
		ath6kl_wmi_disconnect_cmd(ar->wmi);
		/*
		 * Disconnect command is issued, clear the connect pending
		 * flag. The connected flag will be cleared in
		 * disconnect event notification.
		 */
		clear_bit(CONNECT_PEND, &ar->flag);
	}
}

void ath6kl_deep_sleep_enable(struct ath6kl *ar)
{
	switch (ar->sme_state) {
	case SME_CONNECTING:
		cfg80211_connect_result(ar->net_dev, ar->bssid, NULL, 0,
					NULL, 0,
					WLAN_STATUS_UNSPECIFIED_FAILURE,
					GFP_KERNEL);
		break;
	case SME_CONNECTED:
	default:
		/*
		 * FIXME: oddly enough smeState is in DISCONNECTED during
		 * suspend, why? Need to send disconnected event in that
		 * state.
		 */
		cfg80211_disconnected(ar->net_dev, 0, NULL, 0, GFP_KERNEL);
		break;
	}

	if (test_bit(CONNECTED, &ar->flag) ||
	    test_bit(CONNECT_PEND, &ar->flag))
		ath6kl_wmi_disconnect_cmd(ar->wmi);

	ar->sme_state = SME_DISCONNECTED;

	/* disable scanning */
	if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 0,
				      0, 0) != 0)
		printk(KERN_WARNING "ath6kl: failed to disable scan "
		       "during suspend\n");

	ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);
}

/* WMI Event handlers */

static const char *get_hw_id_string(u32 id)
{
	switch (id) {
	case AR6003_REV1_VERSION:
		return "1.0";
	case AR6003_REV2_VERSION:
		return "2.0";
	case AR6003_REV3_VERSION:
		return "2.1.1";
	default:
		return "unknown";
	}
}

void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver)
{
	struct ath6kl *ar = devt;
	struct net_device *dev = ar->net_dev;

	memcpy(dev->dev_addr, datap, ETH_ALEN);
	ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n",
		   __func__, dev->dev_addr);

	ar->version.wlan_ver = sw_ver;
	ar->version.abi_ver = abi_ver;

	snprintf(ar->wdev->wiphy->fw_version,
		 sizeof(ar->wdev->wiphy->fw_version),
		 "%u.%u.%u.%u",
		 (ar->version.wlan_ver & 0xf0000000) >> 28,
		 (ar->version.wlan_ver & 0x0f000000) >> 24,
		 (ar->version.wlan_ver & 0x00ff0000) >> 16,
		 (ar->version.wlan_ver & 0x0000ffff));

	/* indicate to the waiting thread that the ready event was received */
	set_bit(WMI_READY, &ar->flag);
	wake_up(&ar->event_wq);

	ath6kl_info("hw %s fw %s%s\n",
		    get_hw_id_string(ar->wdev->wiphy->hw_version),
		    ar->wdev->wiphy->fw_version,
		    test_bit(TESTMODE, &ar->flag) ? " testmode" : "");
}

void ath6kl_scan_complete_evt(struct ath6kl *ar, int status)
{
	ath6kl_cfg80211_scan_complete_event(ar, status);

	if (!ar->usr_bss_filter) {
		clear_bit(CLEAR_BSSFILTER_ON_BEACON, &ar->flag);
		ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
	}

	ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status);
}

void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid,
			  u16 listen_int, u16 beacon_int,
			  enum network_type net_type, u8 beacon_ie_len,
			  u8 assoc_req_len, u8 assoc_resp_len,
			  u8 *assoc_info)
{
	unsigned long flags;

	ath6kl_cfg80211_connect_event(ar, channel, bssid,
				      listen_int, beacon_int,
				      net_type, beacon_ie_len,
				      assoc_req_len, assoc_resp_len,
				      assoc_info);

	memcpy(ar->bssid, bssid, sizeof(ar->bssid));
	ar->bss_ch = channel;

	if ((ar->nw_type == INFRA_NETWORK))
		ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t,
					      ar->listen_intvl_b);

	netif_wake_queue(ar->net_dev);

	/* Update connect & link status atomically */
	spin_lock_irqsave(&ar->lock, flags);
	set_bit(CONNECTED, &ar->flag);
	clear_bit(CONNECT_PEND, &ar->flag);
	netif_carrier_on(ar->net_dev);
	spin_unlock_irqrestore(&ar->lock, flags);

	aggr_reset_state(ar->aggr_cntxt);
	ar->reconnect_flag = 0;

	if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
		memset(ar->node_map, 0, sizeof(ar->node_map));
		ar->node_num = 0;
		ar->next_ep_id = ENDPOINT_2;
	}

	if (!ar->usr_bss_filter) {
		set_bit(CLEAR_BSSFILTER_ON_BEACON, &ar->flag);
		ath6kl_wmi_bssfilter_cmd(ar->wmi, CURRENT_BSS_FILTER, 0);
	}
}

void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast)
{
	struct ath6kl_sta *sta;
	u8 tsc[6];
	/*
	 * For AP case, keyid will have aid of STA which sent pkt with
	 * MIC error. Use this aid to get MAC & send it to hostapd.
	 */
	if (ar->nw_type == AP_NETWORK) {
		sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
		if (!sta)
			return;

		ath6kl_dbg(ATH6KL_DBG_TRC,
			   "ap tkip mic error received from aid=%d\n", keyid);

		memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
		cfg80211_michael_mic_failure(ar->net_dev, sta->mac,
					     NL80211_KEYTYPE_PAIRWISE, keyid,
					     tsc, GFP_KERNEL);
	} else
		ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast);

}

static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len)
{
	struct wmi_target_stats *tgt_stats =
		(struct wmi_target_stats *) ptr;
	struct target_stats *stats = &ar->target_stats;
	struct tkip_ccmp_stats *ccmp_stats;
	u8 ac;

	if (len < sizeof(*tgt_stats))
		return;

	ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");

	stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
	stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
	stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
	stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
	stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
	stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
	stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
	stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
	stats->tx_rts_success_cnt +=
		le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);

	for (ac = 0; ac < WMM_NUM_AC; ac++)
		stats->tx_pkt_per_ac[ac] +=
			le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);

	stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
	stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
	stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
	stats->tx_mult_retry_cnt +=
		le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
	stats->tx_rts_fail_cnt +=
		le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
	stats->tx_ucast_rate =
	    ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate));

	stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
	stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
	stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
	stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
	stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
	stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
	stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
	stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
	stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
	stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
	stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
	stats->rx_key_cache_miss +=
		le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
	stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
	stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
	stats->rx_ucast_rate =
	    ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate));

	ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;

	stats->tkip_local_mic_fail +=
		le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
	stats->tkip_cnter_measures_invoked +=
		le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
	stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);

	stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
	stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);

	stats->pwr_save_fail_cnt +=
		le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
	stats->noise_floor_calib =
		a_sle32_to_cpu(tgt_stats->noise_floor_calib);

	stats->cs_bmiss_cnt +=
		le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
	stats->cs_low_rssi_cnt +=
		le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
	stats->cs_connect_cnt +=
		le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
	stats->cs_discon_cnt +=
		le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);

	stats->cs_ave_beacon_rssi =
		a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);

	stats->cs_last_roam_msec =
		tgt_stats->cserv_stats.cs_last_roam_msec;
	stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
	stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);

	stats->lq_val = le32_to_cpu(tgt_stats->lq_val);

	stats->wow_pkt_dropped +=
		le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
	stats->wow_host_pkt_wakeups +=
		tgt_stats->wow_stats.wow_host_pkt_wakeups;
	stats->wow_host_evt_wakeups +=
		tgt_stats->wow_stats.wow_host_evt_wakeups;
	stats->wow_evt_discarded +=
		le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);

	if (test_bit(STATS_UPDATE_PEND, &ar->flag)) {
		clear_bit(STATS_UPDATE_PEND, &ar->flag);
		wake_up(&ar->event_wq);
	}
}

static void ath6kl_add_le32(__le32 *var, __le32 val)
{
	*var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
}

void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len)
{
	struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
	struct wmi_ap_mode_stat *ap = &ar->ap_stats;
	struct wmi_per_sta_stat *st_ap, *st_p;
	u8 ac;

	if (ar->nw_type == AP_NETWORK) {
		if (len < sizeof(*p))
			return;

		for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
			st_ap = &ap->sta[ac];
			st_p = &p->sta[ac];

			ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
			ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
			ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
			ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
			ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
			ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
			ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
			ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
		}

	} else {
		ath6kl_update_target_stats(ar, ptr, len);
	}
}

void ath6kl_wakeup_event(void *dev)
{
	struct ath6kl *ar = (struct ath6kl *) dev;

	wake_up(&ar->event_wq);
}

void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
{
	struct ath6kl *ar = (struct ath6kl *) devt;

	ar->tx_pwr = tx_pwr;
	wake_up(&ar->event_wq);
}

void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid)
{
	struct ath6kl_sta *conn;
	struct sk_buff *skb;
	bool psq_empty = false;

	conn = ath6kl_find_sta_by_aid(ar, aid);

	if (!conn)
		return;
	/*
	 * Send out a packet queued on ps queue. When the ps queue
	 * becomes empty update the PVB for this station.
	 */
	spin_lock_bh(&conn->psq_lock);
	psq_empty  = skb_queue_empty(&conn->psq);
	spin_unlock_bh(&conn->psq_lock);

	if (psq_empty)
		/* TODO: Send out a NULL data frame */
		return;

	spin_lock_bh(&conn->psq_lock);
	skb = skb_dequeue(&conn->psq);
	spin_unlock_bh(&conn->psq_lock);

	conn->sta_flags |= STA_PS_POLLED;
	ath6kl_data_tx(skb, ar->net_dev);
	conn->sta_flags &= ~STA_PS_POLLED;

	spin_lock_bh(&conn->psq_lock);
	psq_empty  = skb_queue_empty(&conn->psq);
	spin_unlock_bh(&conn->psq_lock);

	if (psq_empty)
		ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0);
}

void ath6kl_dtimexpiry_event(struct ath6kl *ar)
{
	bool mcastq_empty = false;
	struct sk_buff *skb;

	/*
	 * If there are no associated STAs, ignore the DTIM expiry event.
	 * There can be potential race conditions where the last associated
	 * STA may disconnect & before the host could clear the 'Indicate
	 * DTIM' request to the firmware, the firmware would have just
	 * indicated a DTIM expiry event. The race is between 'clear DTIM
	 * expiry cmd' going from the host to the firmware & the DTIM
	 * expiry event happening from the firmware to the host.
	 */
	if (!ar->sta_list_index)
		return;

	spin_lock_bh(&ar->mcastpsq_lock);
	mcastq_empty = skb_queue_empty(&ar->mcastpsq);
	spin_unlock_bh(&ar->mcastpsq_lock);

	if (mcastq_empty)
		return;

	/* set the STA flag to dtim_expired for the frame to go out */
	set_bit(DTIM_EXPIRED, &ar->flag);

	spin_lock_bh(&ar->mcastpsq_lock);
	while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
		spin_unlock_bh(&ar->mcastpsq_lock);

		ath6kl_data_tx(skb, ar->net_dev);

		spin_lock_bh(&ar->mcastpsq_lock);
	}
	spin_unlock_bh(&ar->mcastpsq_lock);

	clear_bit(DTIM_EXPIRED, &ar->flag);

	/* clear the LSB of the BitMapCtl field of the TIM IE */
	ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
}

void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid,
			     u8 assoc_resp_len, u8 *assoc_info,
			     u16 prot_reason_status)
{
	unsigned long flags;

	if (ar->nw_type == AP_NETWORK) {
		if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
			return;

		/* if no more associated STAs, empty the mcast PS q */
		if (ar->sta_list_index == 0) {
			spin_lock_bh(&ar->mcastpsq_lock);
			skb_queue_purge(&ar->mcastpsq);
			spin_unlock_bh(&ar->mcastpsq_lock);

			/* clear the LSB of the TIM IE's BitMapCtl field */
			if (test_bit(WMI_READY, &ar->flag))
				ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0);
		}

		if (!is_broadcast_ether_addr(bssid)) {
			/* send event to application */
			cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL);
		}

		if (memcmp(ar->net_dev->dev_addr, bssid, ETH_ALEN) == 0) {
			memset(ar->wep_key_list, 0, sizeof(ar->wep_key_list));
			clear_bit(CONNECTED, &ar->flag);
		}
		return;
	}

	ath6kl_cfg80211_disconnect_event(ar, reason, bssid,
				       assoc_resp_len, assoc_info,
				       prot_reason_status);

	aggr_reset_state(ar->aggr_cntxt);

	del_timer(&ar->disconnect_timer);

	ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT,
		   "disconnect reason is %d\n", reason);

	/*
	 * If the event is due to disconnect cmd from the host, only they
	 * the target would stop trying to connect. Under any other
	 * condition, target would keep trying to connect.
	 */
	if (reason == DISCONNECT_CMD) {
		if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
			ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0);
	} else {
		set_bit(CONNECT_PEND, &ar->flag);
		if (((reason == ASSOC_FAILED) &&
		    (prot_reason_status == 0x11)) ||
		    ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0)
		     && (ar->reconnect_flag == 1))) {
			set_bit(CONNECTED, &ar->flag);
			return;
		}
	}

	/* update connect & link status atomically */
	spin_lock_irqsave(&ar->lock, flags);
	clear_bit(CONNECTED, &ar->flag);
	netif_carrier_off(ar->net_dev);
	spin_unlock_irqrestore(&ar->lock, flags);

	if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1))
		ar->reconnect_flag = 0;

	if (reason != CSERV_DISCONNECT)
		ar->user_key_ctrl = 0;

	netif_stop_queue(ar->net_dev);
	memset(ar->bssid, 0, sizeof(ar->bssid));
	ar->bss_ch = 0;

	ath6kl_tx_data_cleanup(ar);
}

static int ath6kl_open(struct net_device *dev)
{
	struct ath6kl *ar = ath6kl_priv(dev);
	unsigned long flags;

	spin_lock_irqsave(&ar->lock, flags);

	set_bit(WLAN_ENABLED, &ar->flag);

	if (test_bit(CONNECTED, &ar->flag)) {
		netif_carrier_on(dev);
		netif_wake_queue(dev);
	} else
		netif_carrier_off(dev);

	spin_unlock_irqrestore(&ar->lock, flags);

	return 0;
}

static int ath6kl_close(struct net_device *dev)
{
	struct ath6kl *ar = ath6kl_priv(dev);

	netif_stop_queue(dev);

	ath6kl_disconnect(ar);

	if (test_bit(WMI_READY, &ar->flag)) {
		if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0,
					      0, 0, 0))
			return -EIO;

		clear_bit(WLAN_ENABLED, &ar->flag);
	}

	ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED);

	return 0;
}

static struct net_device_stats *ath6kl_get_stats(struct net_device *dev)
{
	struct ath6kl *ar = ath6kl_priv(dev);

	return &ar->net_stats;
}

static struct net_device_ops ath6kl_netdev_ops = {
	.ndo_open               = ath6kl_open,
	.ndo_stop               = ath6kl_close,
	.ndo_start_xmit         = ath6kl_data_tx,
	.ndo_get_stats          = ath6kl_get_stats,
};

void init_netdev(struct net_device *dev)
{
	dev->netdev_ops = &ath6kl_netdev_ops;
	dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;

	dev->needed_headroom = ETH_HLEN;
	dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) +
				sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH
				+ WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES;

	return;
}