aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
blob: e9bdfdb95d8f06915fc734dd27053a3e092c046e (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
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * 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 <linux/types.h>
#include <linux/module.h>
#include <linux/if_ether.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/err.h>
#include <linux/jiffies.h>
#include <net/cfg80211.h>

#include <brcmu_utils.h>
#include <brcmu_wifi.h>
#include "dhd.h"
#include "dhd_dbg.h"
#include "dhd_bus.h"
#include "fwil.h"
#include "fwil_types.h"
#include "fweh.h"
#include "fwsignal.h"
#include "p2p.h"
#include "wl_cfg80211.h"
#include "proto.h"

/**
 * DOC: Firmware Signalling
 *
 * Firmware can send signals to host and vice versa, which are passed in the
 * data packets using TLV based header. This signalling layer is on top of the
 * BDC bus protocol layer.
 */

/*
 * single definition for firmware-driver flow control tlv's.
 *
 * each tlv is specified by BRCMF_FWS_TLV_DEF(name, ID, length).
 * A length value 0 indicates variable length tlv.
 */
#define BRCMF_FWS_TLV_DEFLIST \
	BRCMF_FWS_TLV_DEF(MAC_OPEN, 1, 1) \
	BRCMF_FWS_TLV_DEF(MAC_CLOSE, 2, 1) \
	BRCMF_FWS_TLV_DEF(MAC_REQUEST_CREDIT, 3, 2) \
	BRCMF_FWS_TLV_DEF(TXSTATUS, 4, 4) \
	BRCMF_FWS_TLV_DEF(PKTTAG, 5, 4) \
	BRCMF_FWS_TLV_DEF(MACDESC_ADD,	6, 8) \
	BRCMF_FWS_TLV_DEF(MACDESC_DEL, 7, 8) \
	BRCMF_FWS_TLV_DEF(RSSI, 8, 1) \
	BRCMF_FWS_TLV_DEF(INTERFACE_OPEN, 9, 1) \
	BRCMF_FWS_TLV_DEF(INTERFACE_CLOSE, 10, 1) \
	BRCMF_FWS_TLV_DEF(FIFO_CREDITBACK, 11, 6) \
	BRCMF_FWS_TLV_DEF(PENDING_TRAFFIC_BMP, 12, 2) \
	BRCMF_FWS_TLV_DEF(MAC_REQUEST_PACKET, 13, 3) \
	BRCMF_FWS_TLV_DEF(HOST_REORDER_RXPKTS, 14, 10) \
	BRCMF_FWS_TLV_DEF(TRANS_ID, 18, 6) \
	BRCMF_FWS_TLV_DEF(COMP_TXSTATUS, 19, 1) \
	BRCMF_FWS_TLV_DEF(FILLER, 255, 0)

/*
 * enum brcmf_fws_tlv_type - definition of tlv identifiers.
 */
#define BRCMF_FWS_TLV_DEF(name, id, len) \
	BRCMF_FWS_TYPE_ ## name =  id,
enum brcmf_fws_tlv_type {
	BRCMF_FWS_TLV_DEFLIST
	BRCMF_FWS_TYPE_INVALID
};
#undef BRCMF_FWS_TLV_DEF

/*
 * enum brcmf_fws_tlv_len - definition of tlv lengths.
 */
#define BRCMF_FWS_TLV_DEF(name, id, len) \
	BRCMF_FWS_TYPE_ ## name ## _LEN = (len),
enum brcmf_fws_tlv_len {
	BRCMF_FWS_TLV_DEFLIST
};
#undef BRCMF_FWS_TLV_DEF

#ifdef DEBUG
/*
 * brcmf_fws_tlv_names - array of tlv names.
 */
#define BRCMF_FWS_TLV_DEF(name, id, len) \
	{ id, #name },
static struct {
	enum brcmf_fws_tlv_type id;
	const char *name;
} brcmf_fws_tlv_names[] = {
	BRCMF_FWS_TLV_DEFLIST
};
#undef BRCMF_FWS_TLV_DEF


static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(brcmf_fws_tlv_names); i++)
		if (brcmf_fws_tlv_names[i].id == id)
			return brcmf_fws_tlv_names[i].name;

	return "INVALID";
}
#else
static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
{
	return "NODEBUG";
}
#endif /* DEBUG */

/*
 * The PKTTAG tlv has additional bytes when firmware-signalling
 * mode has REUSESEQ flag set.
 */
#define BRCMF_FWS_TYPE_SEQ_LEN				2

/*
 * flags used to enable tlv signalling from firmware.
 */
#define BRCMF_FWS_FLAGS_RSSI_SIGNALS			0x0001
#define BRCMF_FWS_FLAGS_XONXOFF_SIGNALS			0x0002
#define BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS		0x0004
#define BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE	0x0008
#define BRCMF_FWS_FLAGS_PSQ_GENERATIONFSM_ENABLE	0x0010
#define BRCMF_FWS_FLAGS_PSQ_ZERO_BUFFER_ENABLE		0x0020
#define BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE		0x0040

#define BRCMF_FWS_MAC_DESC_TABLE_SIZE			32
#define BRCMF_FWS_MAC_DESC_ID_INVALID			0xff

#define BRCMF_FWS_HOSTIF_FLOWSTATE_OFF			0
#define BRCMF_FWS_HOSTIF_FLOWSTATE_ON			1
#define BRCMF_FWS_FLOWCONTROL_HIWATER			128
#define BRCMF_FWS_FLOWCONTROL_LOWATER			64

#define BRCMF_FWS_PSQ_PREC_COUNT		((BRCMF_FWS_FIFO_COUNT + 1) * 2)
#define BRCMF_FWS_PSQ_LEN				256

#define BRCMF_FWS_HTOD_FLAG_PKTFROMHOST			0x01
#define BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED		0x02

#define BRCMF_FWS_RET_OK_NOSCHEDULE			0
#define BRCMF_FWS_RET_OK_SCHEDULE			1

#define BRCMF_FWS_MODE_REUSESEQ_SHIFT			3	/* seq reuse */
#define BRCMF_FWS_MODE_SET_REUSESEQ(x, val)	((x) = \
		((x) & ~(1 << BRCMF_FWS_MODE_REUSESEQ_SHIFT)) | \
		(((val) & 1) << BRCMF_FWS_MODE_REUSESEQ_SHIFT))
#define BRCMF_FWS_MODE_GET_REUSESEQ(x)	\
		(((x) >> BRCMF_FWS_MODE_REUSESEQ_SHIFT) & 1)

/**
 * enum brcmf_fws_skb_state - indicates processing state of skb.
 *
 * @BRCMF_FWS_SKBSTATE_NEW: sk_buff is newly arrived in the driver.
 * @BRCMF_FWS_SKBSTATE_DELAYED: sk_buff had to wait on queue.
 * @BRCMF_FWS_SKBSTATE_SUPPRESSED: sk_buff has been suppressed by firmware.
 * @BRCMF_FWS_SKBSTATE_TIM: allocated for TIM update info.
 */
enum brcmf_fws_skb_state {
	BRCMF_FWS_SKBSTATE_NEW,
	BRCMF_FWS_SKBSTATE_DELAYED,
	BRCMF_FWS_SKBSTATE_SUPPRESSED,
	BRCMF_FWS_SKBSTATE_TIM
};

/**
 * struct brcmf_skbuff_cb - control buffer associated with skbuff.
 *
 * @bus_flags: 2 bytes reserved for bus specific parameters
 * @if_flags: holds interface index and packet related flags.
 * @htod: host to device packet identifier (used in PKTTAG tlv).
 * @htod_seq: this 16-bit is original seq number for every suppress packet.
 * @state: transmit state of the packet.
 * @mac: descriptor related to destination for this packet.
 *
 * This information is stored in control buffer struct sk_buff::cb, which
 * provides 48 bytes of storage so this structure should not exceed that.
 */
struct brcmf_skbuff_cb {
	u16 bus_flags;
	u16 if_flags;
	u32 htod;
	u16 htod_seq;
	enum brcmf_fws_skb_state state;
	struct brcmf_fws_mac_descriptor *mac;
};

/*
 * macro casting skbuff control buffer to struct brcmf_skbuff_cb.
 */
#define brcmf_skbcb(skb)	((struct brcmf_skbuff_cb *)((skb)->cb))

/*
 * sk_buff control if flags
 *
 *	b[11]  - packet sent upon firmware request.
 *	b[10]  - packet only contains signalling data.
 *	b[9]   - packet is a tx packet.
 *	b[8]   - packet used requested credit
 *	b[7]   - interface in AP mode.
 *	b[3:0] - interface index.
 */
#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK	0x0800
#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT	11
#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK	0x0400
#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT	10
#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK        0x0200
#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT	9
#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_MASK	0x0100
#define BRCMF_SKB_IF_FLAGS_REQ_CREDIT_SHIFT	8
#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK		0x0080
#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT		7
#define BRCMF_SKB_IF_FLAGS_INDEX_MASK		0x000f
#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT		0

#define brcmf_skb_if_flags_set_field(skb, field, value) \
	brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
			BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
			BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
#define brcmf_skb_if_flags_get_field(skb, field) \
	brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
			BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
			BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)

/*
 * sk_buff control packet identifier
 *
 * 32-bit packet identifier used in PKTTAG tlv from host to dongle.
 *
 * - Generated at the host (e.g. dhd)
 * - Seen as a generic sequence number by firmware except for the flags field.
 *
 * Generation	: b[31]	=> generation number for this packet [host->fw]
 *			   OR, current generation number [fw->host]
 * Flags	: b[30:27] => command, status flags
 * FIFO-AC	: b[26:24] => AC-FIFO id
 * h-slot	: b[23:8] => hanger-slot
 * freerun	: b[7:0] => A free running counter
 */
#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK		0x80000000
#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT		31
#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK			0x78000000
#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT			27
#define BRCMF_SKB_HTOD_TAG_FIFO_MASK			0x07000000
#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT			24
#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK			0x00ffff00
#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT			8
#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK			0x000000ff
#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT		0

#define brcmf_skb_htod_tag_set_field(skb, field, value) \
	brcmu_maskset32(&(brcmf_skbcb(skb)->htod), \
			BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
			BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
#define brcmf_skb_htod_tag_get_field(skb, field) \
	brcmu_maskget32(brcmf_skbcb(skb)->htod, \
			BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
			BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)

#define BRCMF_SKB_HTOD_SEQ_FROMFW_MASK			0x2000
#define BRCMF_SKB_HTOD_SEQ_FROMFW_SHIFT			13
#define BRCMF_SKB_HTOD_SEQ_FROMDRV_MASK			0x1000
#define BRCMF_SKB_HTOD_SEQ_FROMDRV_SHIFT		12
#define BRCMF_SKB_HTOD_SEQ_NR_MASK			0x0fff
#define BRCMF_SKB_HTOD_SEQ_NR_SHIFT			0

#define brcmf_skb_htod_seq_set_field(skb, field, value) \
	brcmu_maskset16(&(brcmf_skbcb(skb)->htod_seq), \
			BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
			BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT, (value))
#define brcmf_skb_htod_seq_get_field(skb, field) \
	brcmu_maskget16(brcmf_skbcb(skb)->htod_seq, \
			BRCMF_SKB_HTOD_SEQ_ ## field ## _MASK, \
			BRCMF_SKB_HTOD_SEQ_ ## field ## _SHIFT)

#define BRCMF_FWS_TXSTAT_GENERATION_MASK	0x80000000
#define BRCMF_FWS_TXSTAT_GENERATION_SHIFT	31
#define BRCMF_FWS_TXSTAT_FLAGS_MASK		0x78000000
#define BRCMF_FWS_TXSTAT_FLAGS_SHIFT		27
#define BRCMF_FWS_TXSTAT_FIFO_MASK		0x07000000
#define BRCMF_FWS_TXSTAT_FIFO_SHIFT		24
#define BRCMF_FWS_TXSTAT_HSLOT_MASK		0x00FFFF00
#define BRCMF_FWS_TXSTAT_HSLOT_SHIFT		8
#define BRCMF_FWS_TXSTAT_FREERUN_MASK		0x000000FF
#define BRCMF_FWS_TXSTAT_FREERUN_SHIFT		0

#define brcmf_txstatus_get_field(txs, field) \
	brcmu_maskget32(txs, BRCMF_FWS_TXSTAT_ ## field ## _MASK, \
			BRCMF_FWS_TXSTAT_ ## field ## _SHIFT)

/* How long to defer borrowing in jiffies */
#define BRCMF_FWS_BORROW_DEFER_PERIOD		(HZ / 10)

/**
 * enum brcmf_fws_fifo - fifo indices used by dongle firmware.
 *
 * @BRCMF_FWS_FIFO_FIRST: first fifo, ie. background.
 * @BRCMF_FWS_FIFO_AC_BK: fifo for background traffic.
 * @BRCMF_FWS_FIFO_AC_BE: fifo for best-effort traffic.
 * @BRCMF_FWS_FIFO_AC_VI: fifo for video traffic.
 * @BRCMF_FWS_FIFO_AC_VO: fifo for voice traffic.
 * @BRCMF_FWS_FIFO_BCMC: fifo for broadcast/multicast (AP only).
 * @BRCMF_FWS_FIFO_ATIM: fifo for ATIM (AP only).
 * @BRCMF_FWS_FIFO_COUNT: number of fifos.
 */
enum brcmf_fws_fifo {
	BRCMF_FWS_FIFO_FIRST,
	BRCMF_FWS_FIFO_AC_BK = BRCMF_FWS_FIFO_FIRST,
	BRCMF_FWS_FIFO_AC_BE,
	BRCMF_FWS_FIFO_AC_VI,
	BRCMF_FWS_FIFO_AC_VO,
	BRCMF_FWS_FIFO_BCMC,
	BRCMF_FWS_FIFO_ATIM,
	BRCMF_FWS_FIFO_COUNT
};

/**
 * enum brcmf_fws_txstatus - txstatus flag values.
 *
 * @BRCMF_FWS_TXSTATUS_DISCARD:
 *	host is free to discard the packet.
 * @BRCMF_FWS_TXSTATUS_CORE_SUPPRESS:
 *	802.11 core suppressed the packet.
 * @BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS:
 *	firmware suppress the packet as device is already in PS mode.
 * @BRCMF_FWS_TXSTATUS_FW_TOSSED:
 *	firmware tossed the packet.
 * @BRCMF_FWS_TXSTATUS_HOST_TOSSED:
 *	host tossed the packet.
 */
enum brcmf_fws_txstatus {
	BRCMF_FWS_TXSTATUS_DISCARD,
	BRCMF_FWS_TXSTATUS_CORE_SUPPRESS,
	BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS,
	BRCMF_FWS_TXSTATUS_FW_TOSSED,
	BRCMF_FWS_TXSTATUS_HOST_TOSSED
};

enum brcmf_fws_fcmode {
	BRCMF_FWS_FCMODE_NONE,
	BRCMF_FWS_FCMODE_IMPLIED_CREDIT,
	BRCMF_FWS_FCMODE_EXPLICIT_CREDIT
};

enum brcmf_fws_mac_desc_state {
	BRCMF_FWS_STATE_OPEN = 1,
	BRCMF_FWS_STATE_CLOSE
};

/**
 * struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
 *
 * @occupied: slot is in use.
 * @mac_handle: handle for mac entry determined by firmware.
 * @interface_id: interface index.
 * @state: current state.
 * @suppressed: mac entry is suppressed.
 * @generation: generation bit.
 * @ac_bitmap: ac queue bitmap.
 * @requested_credit: credits requested by firmware.
 * @ea: ethernet address.
 * @seq: per-node free-running sequence.
 * @psq: power-save queue.
 * @transit_count: packet in transit to firmware.
 */
struct brcmf_fws_mac_descriptor {
	char name[16];
	u8 occupied;
	u8 mac_handle;
	u8 interface_id;
	u8 state;
	bool suppressed;
	u8 generation;
	u8 ac_bitmap;
	u8 requested_credit;
	u8 requested_packet;
	u8 ea[ETH_ALEN];
	u8 seq[BRCMF_FWS_FIFO_COUNT];
	struct pktq psq;
	int transit_count;
	int suppr_transit_count;
	bool send_tim_signal;
	u8 traffic_pending_bmp;
	u8 traffic_lastreported_bmp;
};

#define BRCMF_FWS_HANGER_MAXITEMS	1024

/**
 * enum brcmf_fws_hanger_item_state - state of hanger item.
 *
 * @BRCMF_FWS_HANGER_ITEM_STATE_FREE: item is free for use.
 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE: item is in use.
 * @BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED: item was suppressed.
 */
enum brcmf_fws_hanger_item_state {
	BRCMF_FWS_HANGER_ITEM_STATE_FREE = 1,
	BRCMF_FWS_HANGER_ITEM_STATE_INUSE,
	BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED
};


/**
 * struct brcmf_fws_hanger_item - single entry for tx pending packet.
 *
 * @state: entry is either free or occupied.
 * @pkt: packet itself.
 */
struct brcmf_fws_hanger_item {
	enum brcmf_fws_hanger_item_state state;
	struct sk_buff *pkt;
};

/**
 * struct brcmf_fws_hanger - holds packets awaiting firmware txstatus.
 *
 * @pushed: packets pushed to await txstatus.
 * @popped: packets popped upon handling txstatus.
 * @failed_to_push: packets that could not be pushed.
 * @failed_to_pop: packets that could not be popped.
 * @failed_slotfind: packets for which failed to find an entry.
 * @slot_pos: last returned item index for a free entry.
 * @items: array of hanger items.
 */
struct brcmf_fws_hanger {
	u32 pushed;
	u32 popped;
	u32 failed_to_push;
	u32 failed_to_pop;
	u32 failed_slotfind;
	u32 slot_pos;
	struct brcmf_fws_hanger_item items[BRCMF_FWS_HANGER_MAXITEMS];
};

struct brcmf_fws_macdesc_table {
	struct brcmf_fws_mac_descriptor nodes[BRCMF_FWS_MAC_DESC_TABLE_SIZE];
	struct brcmf_fws_mac_descriptor iface[BRCMF_MAX_IFS];
	struct brcmf_fws_mac_descriptor other;
};

struct brcmf_fws_info {
	struct brcmf_pub *drvr;
	spinlock_t spinlock;
	ulong flags;
	struct brcmf_fws_stats stats;
	struct brcmf_fws_hanger hanger;
	enum brcmf_fws_fcmode fcmode;
	bool fw_signals;
	bool bcmc_credit_check;
	struct brcmf_fws_macdesc_table desc;
	struct workqueue_struct *fws_wq;
	struct work_struct fws_dequeue_work;
	u32 fifo_enqpkt[BRCMF_FWS_FIFO_COUNT];
	int fifo_credit[BRCMF_FWS_FIFO_COUNT];
	int credits_borrowed[BRCMF_FWS_FIFO_AC_VO + 1];
	int deq_node_pos[BRCMF_FWS_FIFO_COUNT];
	u32 fifo_credit_map;
	u32 fifo_delay_map;
	unsigned long borrow_defer_timestamp;
	bool bus_flow_blocked;
	bool creditmap_received;
	u8 mode;
};

/*
 * brcmf_fws_prio2fifo - mapping from 802.1d priority to firmware fifo index.
 */
static const int brcmf_fws_prio2fifo[] = {
	BRCMF_FWS_FIFO_AC_BE,
	BRCMF_FWS_FIFO_AC_BK,
	BRCMF_FWS_FIFO_AC_BK,
	BRCMF_FWS_FIFO_AC_BE,
	BRCMF_FWS_FIFO_AC_VI,
	BRCMF_FWS_FIFO_AC_VI,
	BRCMF_FWS_FIFO_AC_VO,
	BRCMF_FWS_FIFO_AC_VO
};

static int fcmode;
module_param(fcmode, int, S_IRUSR);
MODULE_PARM_DESC(fcmode, "mode of firmware signalled flow control");

#define BRCMF_FWS_TLV_DEF(name, id, len) \
	case BRCMF_FWS_TYPE_ ## name: \
		return len;

/**
 * brcmf_fws_get_tlv_len() - returns defined length for given tlv id.
 *
 * @fws: firmware-signalling information.
 * @id: identifier of the TLV.
 *
 * Return: the specified length for the given TLV; Otherwise -EINVAL.
 */
static int brcmf_fws_get_tlv_len(struct brcmf_fws_info *fws,
				 enum brcmf_fws_tlv_type id)
{
	switch (id) {
	BRCMF_FWS_TLV_DEFLIST
	default:
		fws->stats.tlv_invalid_type++;
		break;
	}
	return -EINVAL;
}
#undef BRCMF_FWS_TLV_DEF

static void brcmf_fws_lock(struct brcmf_fws_info *fws)
		__acquires(&fws->spinlock)
{
	spin_lock_irqsave(&fws->spinlock, fws->flags);
}

static void brcmf_fws_unlock(struct brcmf_fws_info *fws)
		__releases(&fws->spinlock)
{
	spin_unlock_irqrestore(&fws->spinlock, fws->flags);
}

static bool brcmf_fws_ifidx_match(struct sk_buff *skb, void *arg)
{
	u32 ifidx = brcmf_skb_if_flags_get_field(skb, INDEX);
	return ifidx == *(int *)arg;
}

static void brcmf_fws_psq_flush(struct brcmf_fws_info *fws, struct pktq *q,
				int ifidx)
{
	bool (*matchfn)(struct sk_buff *, void *) = NULL;
	struct sk_buff *skb;
	int prec;

	if (ifidx != -1)
		matchfn = brcmf_fws_ifidx_match;
	for (prec = 0; prec < q->num_prec; prec++) {
		skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
		while (skb) {
			brcmu_pkt_buf_free_skb(skb);
			skb = brcmu_pktq_pdeq_match(q, prec, matchfn, &ifidx);
		}
	}
}

static void brcmf_fws_hanger_init(struct brcmf_fws_hanger *hanger)
{
	int i;

	memset(hanger, 0, sizeof(*hanger));
	for (i = 0; i < ARRAY_SIZE(hanger->items); i++)
		hanger->items[i].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
}

static u32 brcmf_fws_hanger_get_free_slot(struct brcmf_fws_hanger *h)
{
	u32 i;

	i = (h->slot_pos + 1) % BRCMF_FWS_HANGER_MAXITEMS;

	while (i != h->slot_pos) {
		if (h->items[i].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
			h->slot_pos = i;
			goto done;
		}
		i++;
		if (i == BRCMF_FWS_HANGER_MAXITEMS)
			i = 0;
	}
	brcmf_err("all slots occupied\n");
	h->failed_slotfind++;
	i = BRCMF_FWS_HANGER_MAXITEMS;
done:
	return i;
}

static int brcmf_fws_hanger_pushpkt(struct brcmf_fws_hanger *h,
				    struct sk_buff *pkt, u32 slot_id)
{
	if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
		return -ENOENT;

	if (h->items[slot_id].state != BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
		brcmf_err("slot is not free\n");
		h->failed_to_push++;
		return -EINVAL;
	}

	h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE;
	h->items[slot_id].pkt = pkt;
	h->pushed++;
	return 0;
}

static int brcmf_fws_hanger_poppkt(struct brcmf_fws_hanger *h,
					  u32 slot_id, struct sk_buff **pktout,
					  bool remove_item)
{
	if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
		return -ENOENT;

	if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
		brcmf_err("entry not in use\n");
		h->failed_to_pop++;
		return -EINVAL;
	}

	*pktout = h->items[slot_id].pkt;
	if (remove_item) {
		h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
		h->items[slot_id].pkt = NULL;
		h->popped++;
	}
	return 0;
}

static int brcmf_fws_hanger_mark_suppressed(struct brcmf_fws_hanger *h,
					    u32 slot_id)
{
	if (slot_id >= BRCMF_FWS_HANGER_MAXITEMS)
		return -ENOENT;

	if (h->items[slot_id].state == BRCMF_FWS_HANGER_ITEM_STATE_FREE) {
		brcmf_err("entry not in use\n");
		return -EINVAL;
	}

	h->items[slot_id].state = BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED;
	return 0;
}

static void brcmf_fws_hanger_cleanup(struct brcmf_fws_info *fws,
				     bool (*fn)(struct sk_buff *, void *),
				     int ifidx)
{
	struct brcmf_fws_hanger *h = &fws->hanger;
	struct sk_buff *skb;
	int i;
	enum brcmf_fws_hanger_item_state s;

	for (i = 0; i < ARRAY_SIZE(h->items); i++) {
		s = h->items[i].state;
		if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE ||
		    s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE_SUPPRESSED) {
			skb = h->items[i].pkt;
			if (fn == NULL || fn(skb, &ifidx)) {
				/* suppress packets freed from psq */
				if (s == BRCMF_FWS_HANGER_ITEM_STATE_INUSE)
					brcmu_pkt_buf_free_skb(skb);
				h->items[i].state =
					BRCMF_FWS_HANGER_ITEM_STATE_FREE;
			}
		}
	}
}

static void brcmf_fws_macdesc_set_name(struct brcmf_fws_info *fws,
				       struct brcmf_fws_mac_descriptor *desc)
{
	if (desc == &fws->desc.other)
		strlcpy(desc->name, "MAC-OTHER", sizeof(desc->name));
	else if (desc->mac_handle)
		scnprintf(desc->name, sizeof(desc->name), "MAC-%d:%d",
			  desc->mac_handle, desc->interface_id);
	else
		scnprintf(desc->name, sizeof(desc->name), "MACIF:%d",
			  desc->interface_id);
}

static void brcmf_fws_macdesc_init(struct brcmf_fws_mac_descriptor *desc,
				   u8 *addr, u8 ifidx)
{
	brcmf_dbg(TRACE,
		  "enter: desc %p ea=%pM, ifidx=%u\n", desc, addr, ifidx);
	desc->occupied = 1;
	desc->state = BRCMF_FWS_STATE_OPEN;
	desc->requested_credit = 0;
	desc->requested_packet = 0;
	/* depending on use may need ifp->bssidx instead */
	desc->interface_id = ifidx;
	desc->ac_bitmap = 0xff; /* update this when handling APSD */
	if (addr)
		memcpy(&desc->ea[0], addr, ETH_ALEN);
}

static
void brcmf_fws_macdesc_deinit(struct brcmf_fws_mac_descriptor *desc)
{
	brcmf_dbg(TRACE,
		  "enter: ea=%pM, ifidx=%u\n", desc->ea, desc->interface_id);
	desc->occupied = 0;
	desc->state = BRCMF_FWS_STATE_CLOSE;
	desc->requested_credit = 0;
	desc->requested_packet = 0;
}

static struct brcmf_fws_mac_descriptor *
brcmf_fws_macdesc_lookup(struct brcmf_fws_info *fws, u8 *ea)
{
	struct brcmf_fws_mac_descriptor *entry;
	int i;

	if (ea == NULL)
		return ERR_PTR(-EINVAL);

	entry = &fws->desc.nodes[0];
	for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++) {
		if (entry->occupied && !memcmp(entry->ea, ea, ETH_ALEN))
			return entry;
		entry++;
	}

	return ERR_PTR(-ENOENT);
}

static struct brcmf_fws_mac_descriptor*
brcmf_fws_macdesc_find(struct brcmf_fws_info *fws, struct brcmf_if *ifp, u8 *da)
{
	struct brcmf_fws_mac_descriptor *entry = &fws->desc.other;
	bool multicast;

	multicast = is_multicast_ether_addr(da);

	/* Multicast destination, STA and P2P clients get the interface entry.
	 * STA/GC gets the Mac Entry for TDLS destinations, TDLS destinations
	 * have their own entry.
	 */
	if (multicast && ifp->fws_desc) {
		entry = ifp->fws_desc;
		goto done;
	}

	entry = brcmf_fws_macdesc_lookup(fws, da);
	if (IS_ERR(entry))
		entry = ifp->fws_desc;

done:
	return entry;
}

static bool brcmf_fws_macdesc_closed(struct brcmf_fws_info *fws,
				     struct brcmf_fws_mac_descriptor *entry,
				     int fifo)
{
	struct brcmf_fws_mac_descriptor *if_entry;
	bool closed;

	/* for unique destination entries the related interface
	 * may be closed.
	 */
	if (entry->mac_handle) {
		if_entry = &fws->desc.iface[entry->interface_id];
		if (if_entry->state == BRCMF_FWS_STATE_CLOSE)
			return true;
	}
	/* an entry is closed when the state is closed and
	 * the firmware did not request anything.
	 */
	closed = entry->state == BRCMF_FWS_STATE_CLOSE &&
		 !entry->requested_credit && !entry->requested_packet;

	/* Or firmware does not allow traffic for given fifo */
	return closed || !(entry->ac_bitmap & BIT(fifo));
}

static void brcmf_fws_macdesc_cleanup(struct brcmf_fws_info *fws,
				      struct brcmf_fws_mac_descriptor *entry,
				      int ifidx)
{
	if (entry->occupied && (ifidx == -1 || ifidx == entry->interface_id)) {
		brcmf_fws_psq_flush(fws, &entry->psq, ifidx);
		entry->occupied = !!(entry->psq.len);
	}
}

static void brcmf_fws_bus_txq_cleanup(struct brcmf_fws_info *fws,
				      bool (*fn)(struct sk_buff *, void *),
				      int ifidx)
{
	struct brcmf_fws_hanger_item *hi;
	struct pktq *txq;
	struct sk_buff *skb;
	int prec;
	u32 hslot;

	txq = brcmf_bus_gettxq(fws->drvr->bus_if);
	if (IS_ERR(txq)) {
		brcmf_dbg(TRACE, "no txq to clean up\n");
		return;
	}

	for (prec = 0; prec < txq->num_prec; prec++) {
		skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
		while (skb) {
			hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
			hi = &fws->hanger.items[hslot];
			WARN_ON(skb != hi->pkt);
			hi->state = BRCMF_FWS_HANGER_ITEM_STATE_FREE;
			brcmu_pkt_buf_free_skb(skb);
			skb = brcmu_pktq_pdeq_match(txq, prec, fn, &ifidx);
		}
	}
}

static void brcmf_fws_cleanup(struct brcmf_fws_info *fws, int ifidx)
{
	int i;
	struct brcmf_fws_mac_descriptor *table;
	bool (*matchfn)(struct sk_buff *, void *) = NULL;

	if (fws == NULL)
		return;

	if (ifidx != -1)
		matchfn = brcmf_fws_ifidx_match;

	/* cleanup individual nodes */
	table = &fws->desc.nodes[0];
	for (i = 0; i < ARRAY_SIZE(fws->desc.nodes); i++)
		brcmf_fws_macdesc_cleanup(fws, &table[i], ifidx);

	brcmf_fws_macdesc_cleanup(fws, &fws->desc.other, ifidx);
	brcmf_fws_bus_txq_cleanup(fws, matchfn, ifidx);
	brcmf_fws_hanger_cleanup(fws, matchfn, ifidx);
}

static int brcmf_fws_hdrpush(struct brcmf_fws_info *fws, struct sk_buff *skb)
{
	struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
	u8 *wlh;
	u16 data_offset = 0;
	u8 fillers;
	__le32 pkttag = cpu_to_le32(brcmf_skbcb(skb)->htod);
	__le16 pktseq = cpu_to_le16(brcmf_skbcb(skb)->htod_seq);

	brcmf_dbg(TRACE, "enter: %s, idx=%d hslot=%d htod %X seq %X\n",
		  entry->name, brcmf_skb_if_flags_get_field(skb, INDEX),
		  (le32_to_cpu(pkttag) >> 8) & 0xffff,
		  brcmf_skbcb(skb)->htod, brcmf_skbcb(skb)->htod_seq);
	if (entry->send_tim_signal)
		data_offset += 2 + BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
	if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode))
		data_offset += BRCMF_FWS_TYPE_SEQ_LEN;
	/* +2 is for Type[1] and Len[1] in TLV, plus TIM signal */
	data_offset += 2 + BRCMF_FWS_TYPE_PKTTAG_LEN;
	fillers = round_up(data_offset, 4) - data_offset;
	data_offset += fillers;

	skb_push(skb, data_offset);
	wlh = skb->data;

	wlh[0] = BRCMF_FWS_TYPE_PKTTAG;
	wlh[1] = BRCMF_FWS_TYPE_PKTTAG_LEN;
	memcpy(&wlh[2], &pkttag, sizeof(pkttag));
	if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
		wlh[1] += BRCMF_FWS_TYPE_SEQ_LEN;
		memcpy(&wlh[2 + BRCMF_FWS_TYPE_PKTTAG_LEN], &pktseq,
		       sizeof(pktseq));
	}
	wlh += wlh[1] + 2;

	if (entry->send_tim_signal) {
		entry->send_tim_signal = 0;
		wlh[0] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP;
		wlh[1] = BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN;
		wlh[2] = entry->mac_handle;
		wlh[3] = entry->traffic_pending_bmp;
		brcmf_dbg(TRACE, "adding TIM info: handle %d bmp 0x%X\n",
			  entry->mac_handle, entry->traffic_pending_bmp);
		wlh += BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2;
		entry->traffic_lastreported_bmp = entry->traffic_pending_bmp;
	}
	if (fillers)
		memset(wlh, BRCMF_FWS_TYPE_FILLER, fillers);

	brcmf_proto_hdrpush(fws->drvr, brcmf_skb_if_flags_get_field(skb, INDEX),
			    data_offset >> 2, skb);
	return 0;
}

static bool brcmf_fws_tim_update(struct brcmf_fws_info *fws,
				 struct brcmf_fws_mac_descriptor *entry,
				 int fifo, bool send_immediately)
{
	struct sk_buff *skb;
	struct brcmf_bus *bus;
	struct brcmf_skbuff_cb *skcb;
	s32 err;
	u32 len;

	/* check delayedQ and suppressQ in one call using bitmap */
	if (brcmu_pktq_mlen(&entry->psq, 3 << (fifo * 2)) == 0)
		entry->traffic_pending_bmp &= ~NBITVAL(fifo);
	else
		entry->traffic_pending_bmp |= NBITVAL(fifo);

	entry->send_tim_signal = false;
	if (entry->traffic_lastreported_bmp != entry->traffic_pending_bmp)
		entry->send_tim_signal = true;
	if (send_immediately && entry->send_tim_signal &&
	    entry->state == BRCMF_FWS_STATE_CLOSE) {
		/* create a dummy packet and sent that. The traffic          */
		/* bitmap info will automatically be attached to that packet */
		len = BRCMF_FWS_TYPE_PKTTAG_LEN + 2 +
		      BRCMF_FWS_TYPE_SEQ_LEN +
		      BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP_LEN + 2 +
		      4 + fws->drvr->hdrlen;
		skb = brcmu_pkt_buf_get_skb(len);
		if (skb == NULL)
			return false;
		skb_pull(skb, len);
		skcb = brcmf_skbcb(skb);
		skcb->mac = entry;
		skcb->state = BRCMF_FWS_SKBSTATE_TIM;
		skcb->htod = 0;
		skcb->htod_seq = 0;
		bus = fws->drvr->bus_if;
		err = brcmf_fws_hdrpush(fws, skb);
		if (err == 0) {
			brcmf_fws_unlock(fws);
			err = brcmf_bus_txdata(bus, skb);
			brcmf_fws_lock(fws);
		}
		if (err)
			brcmu_pkt_buf_free_skb(skb);
		return true;
	}
	return false;
}

static void
brcmf_fws_flow_control_check(struct brcmf_fws_info *fws, struct pktq *pq,
			     u8 if_id)
{
	struct brcmf_if *ifp = fws->drvr->iflist[!if_id ? 0 : if_id + 1];

	if (WARN_ON(!ifp))
		return;

	if ((ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
	    pq->len <= BRCMF_FWS_FLOWCONTROL_LOWATER)
		brcmf_txflowblock_if(ifp,
				     BRCMF_NETIF_STOP_REASON_FWS_FC, false);
	if (!(ifp->netif_stop & BRCMF_NETIF_STOP_REASON_FWS_FC) &&
	    pq->len >= BRCMF_FWS_FLOWCONTROL_HIWATER) {
		fws->stats.fws_flow_block++;
		brcmf_txflowblock_if(ifp, BRCMF_NETIF_STOP_REASON_FWS_FC, true);
	}
	return;
}

static int brcmf_fws_rssi_indicate(struct brcmf_fws_info *fws, s8 rssi)
{
	brcmf_dbg(CTL, "rssi %d\n", rssi);
	return 0;
}

static
int brcmf_fws_macdesc_indicate(struct brcmf_fws_info *fws, u8 type, u8 *data)
{
	struct brcmf_fws_mac_descriptor *entry, *existing;
	u8 mac_handle;
	u8 ifidx;
	u8 *addr;

	mac_handle = *data++;
	ifidx = *data++;
	addr = data;

	entry = &fws->desc.nodes[mac_handle & 0x1F];
	if (type == BRCMF_FWS_TYPE_MACDESC_DEL) {
		if (entry->occupied) {
			brcmf_dbg(TRACE, "deleting %s mac %pM\n",
				  entry->name, addr);
			brcmf_fws_lock(fws);
			brcmf_fws_macdesc_cleanup(fws, entry, -1);
			brcmf_fws_macdesc_deinit(entry);
			brcmf_fws_unlock(fws);
		} else
			fws->stats.mac_update_failed++;
		return 0;
	}

	existing = brcmf_fws_macdesc_lookup(fws, addr);
	if (IS_ERR(existing)) {
		if (!entry->occupied) {
			brcmf_fws_lock(fws);
			entry->mac_handle = mac_handle;
			brcmf_fws_macdesc_init(entry, addr, ifidx);
			brcmf_fws_macdesc_set_name(fws, entry);
			brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
					BRCMF_FWS_PSQ_LEN);
			brcmf_fws_unlock(fws);
			brcmf_dbg(TRACE, "add %s mac %pM\n", entry->name, addr);
		} else {
			fws->stats.mac_update_failed++;
		}
	} else {
		if (entry != existing) {
			brcmf_dbg(TRACE, "copy mac %s\n", existing->name);
			brcmf_fws_lock(fws);
			memcpy(entry, existing,
			       offsetof(struct brcmf_fws_mac_descriptor, psq));
			entry->mac_handle = mac_handle;
			brcmf_fws_macdesc_deinit(existing);
			brcmf_fws_macdesc_set_name(fws, entry);
			brcmf_fws_unlock(fws);
			brcmf_dbg(TRACE, "relocate %s mac %pM\n", entry->name,
				  addr);
		} else {
			brcmf_dbg(TRACE, "use existing\n");
			WARN_ON(entry->mac_handle != mac_handle);
			/* TODO: what should we do here: continue, reinit, .. */
		}
	}
	return 0;
}

static int brcmf_fws_macdesc_state_indicate(struct brcmf_fws_info *fws,
					    u8 type, u8 *data)
{
	struct brcmf_fws_mac_descriptor *entry;
	u8 mac_handle;
	int ret;

	mac_handle = data[0];
	entry = &fws->desc.nodes[mac_handle & 0x1F];
	if (!entry->occupied) {
		fws->stats.mac_ps_update_failed++;
		return -ESRCH;
	}
	brcmf_fws_lock(fws);
	/* a state update should wipe old credits */
	entry->requested_credit = 0;
	entry->requested_packet = 0;
	if (type == BRCMF_FWS_TYPE_MAC_OPEN) {
		entry->state = BRCMF_FWS_STATE_OPEN;
		ret = BRCMF_FWS_RET_OK_SCHEDULE;
	} else {
		entry->state = BRCMF_FWS_STATE_CLOSE;
		brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BK, false);
		brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_BE, false);
		brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VI, false);
		brcmf_fws_tim_update(fws, entry, BRCMF_FWS_FIFO_AC_VO, true);
		ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
	}
	brcmf_fws_unlock(fws);
	return ret;
}

static int brcmf_fws_interface_state_indicate(struct brcmf_fws_info *fws,
					      u8 type, u8 *data)
{
	struct brcmf_fws_mac_descriptor *entry;
	u8 ifidx;
	int ret;

	ifidx = data[0];

	if (ifidx >= BRCMF_MAX_IFS) {
		ret = -ERANGE;
		goto fail;
	}

	entry = &fws->desc.iface[ifidx];
	if (!entry->occupied) {
		ret = -ESRCH;
		goto fail;
	}

	brcmf_dbg(TRACE, "%s (%d): %s\n", brcmf_fws_get_tlv_name(type), type,
		  entry->name);
	brcmf_fws_lock(fws);
	switch (type) {
	case BRCMF_FWS_TYPE_INTERFACE_OPEN:
		entry->state = BRCMF_FWS_STATE_OPEN;
		ret = BRCMF_FWS_RET_OK_SCHEDULE;
		break;
	case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
		entry->state = BRCMF_FWS_STATE_CLOSE;
		ret = BRCMF_FWS_RET_OK_NOSCHEDULE;
		break;
	default:
		ret = -EINVAL;
		brcmf_fws_unlock(fws);
		goto fail;
	}
	brcmf_fws_unlock(fws);
	return ret;

fail:
	fws->stats.if_update_failed++;
	return ret;
}

static int brcmf_fws_request_indicate(struct brcmf_fws_info *fws, u8 type,
				      u8 *data)
{
	struct brcmf_fws_mac_descriptor *entry;

	entry = &fws->desc.nodes[data[1] & 0x1F];
	if (!entry->occupied) {
		if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
			fws->stats.credit_request_failed++;
		else
			fws->stats.packet_request_failed++;
		return -ESRCH;
	}

	brcmf_dbg(TRACE, "%s (%d): %s cnt %d bmp %d\n",
		  brcmf_fws_get_tlv_name(type), type, entry->name,
		  data[0], data[2]);
	brcmf_fws_lock(fws);
	if (type == BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT)
		entry->requested_credit = data[0];
	else
		entry->requested_packet = data[0];

	entry->ac_bitmap = data[2];
	brcmf_fws_unlock(fws);
	return BRCMF_FWS_RET_OK_SCHEDULE;
}

static void
brcmf_fws_macdesc_use_req_credit(struct brcmf_fws_mac_descriptor *entry,
				 struct sk_buff *skb)
{
	if (entry->requested_credit > 0) {
		entry->requested_credit--;
		brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
		brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 1);
		if (entry->state != BRCMF_FWS_STATE_CLOSE)
			brcmf_err("requested credit set while mac not closed!\n");
	} else if (entry->requested_packet > 0) {
		entry->requested_packet--;
		brcmf_skb_if_flags_set_field(skb, REQUESTED, 1);
		brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
		if (entry->state != BRCMF_FWS_STATE_CLOSE)
			brcmf_err("requested packet set while mac not closed!\n");
	} else {
		brcmf_skb_if_flags_set_field(skb, REQUESTED, 0);
		brcmf_skb_if_flags_set_field(skb, REQ_CREDIT, 0);
	}
}

static void brcmf_fws_macdesc_return_req_credit(struct sk_buff *skb)
{
	struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;

	if ((brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) &&
	    (entry->state == BRCMF_FWS_STATE_CLOSE))
		entry->requested_credit++;
}

static void brcmf_fws_return_credits(struct brcmf_fws_info *fws,
				     u8 fifo, u8 credits)
{
	int lender_ac;
	int *borrowed;
	int *fifo_credit;

	if (!credits)
		return;

	fws->fifo_credit_map |= 1 << fifo;

	if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
	    (fws->credits_borrowed[0])) {
		for (lender_ac = BRCMF_FWS_FIFO_AC_VO; lender_ac >= 0;
		     lender_ac--) {
			borrowed = &fws->credits_borrowed[lender_ac];
			if (*borrowed) {
				fws->fifo_credit_map |= (1 << lender_ac);
				fifo_credit = &fws->fifo_credit[lender_ac];
				if (*borrowed >= credits) {
					*borrowed -= credits;
					*fifo_credit += credits;
					return;
				} else {
					credits -= *borrowed;
					*fifo_credit += *borrowed;
					*borrowed = 0;
				}
			}
		}
	}

	fws->fifo_credit[fifo] += credits;
}

static void brcmf_fws_schedule_deq(struct brcmf_fws_info *fws)
{
	/* only schedule dequeue when there are credits for delayed traffic */
	if ((fws->fifo_credit_map & fws->fifo_delay_map) ||
	    (!brcmf_fws_fc_active(fws) && fws->fifo_delay_map))
		queue_work(fws->fws_wq, &fws->fws_dequeue_work);
}

static int brcmf_fws_enq(struct brcmf_fws_info *fws,
			 enum brcmf_fws_skb_state state, int fifo,
			 struct sk_buff *p)
{
	int prec = 2 * fifo;
	u32 *qfull_stat = &fws->stats.delayq_full_error;
	struct brcmf_fws_mac_descriptor *entry;
	struct pktq *pq;
	struct sk_buff_head *queue;
	struct sk_buff *p_head;
	struct sk_buff *p_tail;
	u32 fr_new;
	u32 fr_compare;

	entry = brcmf_skbcb(p)->mac;
	if (entry == NULL) {
		brcmf_err("no mac descriptor found for skb %p\n", p);
		return -ENOENT;
	}

	brcmf_dbg(DATA, "enter: fifo %d skb %p\n", fifo, p);
	if (state == BRCMF_FWS_SKBSTATE_SUPPRESSED) {
		prec += 1;
		qfull_stat = &fws->stats.supprq_full_error;

		/* Fix out of order delivery of frames. Dont assume frame    */
		/* can be inserted at the end, but look for correct position */
		pq = &entry->psq;
		if (pktq_full(pq) || pktq_pfull(pq, prec)) {
			*qfull_stat += 1;
			return -ENFILE;
		}
		queue = &pq->q[prec].skblist;

		p_head = skb_peek(queue);
		p_tail = skb_peek_tail(queue);
		fr_new = brcmf_skb_htod_tag_get_field(p, FREERUN);

		while (p_head != p_tail) {
			fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
								  FREERUN);
			/* be sure to handle wrap of 256 */
			if (((fr_new > fr_compare) &&
			     ((fr_new - fr_compare) < 128)) ||
			    ((fr_new < fr_compare) &&
			     ((fr_compare - fr_new) > 128)))
				break;
			p_tail = skb_queue_prev(queue, p_tail);
		}
		/* Position found. Determine what to do */
		if (p_tail == NULL) {
			/* empty list */
			__skb_queue_tail(queue, p);
		} else {
			fr_compare = brcmf_skb_htod_tag_get_field(p_tail,
								  FREERUN);
			if (((fr_new > fr_compare) &&
			     ((fr_new - fr_compare) < 128)) ||
			    ((fr_new < fr_compare) &&
			     ((fr_compare - fr_new) > 128))) {
				/* After tail */
				__skb_queue_after(queue, p_tail, p);
			} else {
				/* Before tail */
				__skb_insert(p, p_tail->prev, p_tail, queue);
			}
		}

		/* Complete the counters and statistics */
		pq->len++;
		if (pq->hi_prec < prec)
			pq->hi_prec = (u8) prec;
	} else if (brcmu_pktq_penq(&entry->psq, prec, p) == NULL) {
		*qfull_stat += 1;
		return -ENFILE;
	}

	/* increment total enqueued packet count */
	fws->fifo_delay_map |= 1 << fifo;
	fws->fifo_enqpkt[fifo]++;

	/* update the sk_buff state */
	brcmf_skbcb(p)->state = state;

	/*
	 * A packet has been pushed so update traffic
	 * availability bitmap, if applicable
	 */
	brcmf_fws_tim_update(fws, entry, fifo, true);
	brcmf_fws_flow_control_check(fws, &entry->psq,
				     brcmf_skb_if_flags_get_field(p, INDEX));
	return 0;
}

static struct sk_buff *brcmf_fws_deq(struct brcmf_fws_info *fws, int fifo)
{
	struct brcmf_fws_mac_descriptor *table;
	struct brcmf_fws_mac_descriptor *entry;
	struct sk_buff *p;
	int num_nodes;
	int node_pos;
	int prec_out;
	int pmsk;
	int i;

	table = (struct brcmf_fws_mac_descriptor *)&fws->desc;
	num_nodes = sizeof(fws->desc) / sizeof(struct brcmf_fws_mac_descriptor);
	node_pos = fws->deq_node_pos[fifo];

	for (i = 0; i < num_nodes; i++) {
		entry = &table[(node_pos + i) % num_nodes];
		if (!entry->occupied ||
		    brcmf_fws_macdesc_closed(fws, entry, fifo))
			continue;

		if (entry->suppressed)
			pmsk = 2;
		else
			pmsk = 3;
		p = brcmu_pktq_mdeq(&entry->psq, pmsk << (fifo * 2), &prec_out);
		if (p == NULL) {
			if (entry->suppressed) {
				if (entry->suppr_transit_count)
					continue;
				entry->suppressed = false;
				p = brcmu_pktq_mdeq(&entry->psq,
						    1 << (fifo * 2), &prec_out);
			}
		}
		if  (p == NULL)
			continue;

		brcmf_fws_macdesc_use_req_credit(entry, p);

		/* move dequeue position to ensure fair round-robin */
		fws->deq_node_pos[fifo] = (node_pos + i + 1) % num_nodes;
		brcmf_fws_flow_control_check(fws, &entry->psq,
					     brcmf_skb_if_flags_get_field(p,
									  INDEX)
					     );
		/*
		 * A packet has been picked up, update traffic
		 * availability bitmap, if applicable
		 */
		brcmf_fws_tim_update(fws, entry, fifo, false);

		/*
		 * decrement total enqueued fifo packets and
		 * clear delay bitmap if done.
		 */
		fws->fifo_enqpkt[fifo]--;
		if (fws->fifo_enqpkt[fifo] == 0)
			fws->fifo_delay_map &= ~(1 << fifo);
		goto done;
	}
	p = NULL;
done:
	brcmf_dbg(DATA, "exit: fifo %d skb %p\n", fifo, p);
	return p;
}

static int brcmf_fws_txstatus_suppressed(struct brcmf_fws_info *fws, int fifo,
					 struct sk_buff *skb, u32 genbit,
					 u16 seq)
{
	struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
	u32 hslot;
	int ret;
	u8 ifidx;

	hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);

	/* this packet was suppressed */
	if (!entry->suppressed) {
		entry->suppressed = true;
		entry->suppr_transit_count = entry->transit_count;
		brcmf_dbg(DATA, "suppress %s: transit %d\n",
			  entry->name, entry->transit_count);
	}

	entry->generation = genbit;

	ret = brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
	if (ret == 0)
		brcmf_skb_htod_tag_set_field(skb, GENERATION, genbit);
		brcmf_skbcb(skb)->htod_seq = seq;
		if (brcmf_skb_htod_seq_get_field(skb, FROMFW)) {
			brcmf_skb_htod_seq_set_field(skb, FROMDRV, 1);
			brcmf_skb_htod_seq_set_field(skb, FROMFW, 0);
		} else {
			brcmf_skb_htod_seq_set_field(skb, FROMDRV, 0);
		}
		ret = brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_SUPPRESSED, fifo,
				    skb);
	if (ret != 0) {
		/* suppress q is full or hdrpull failed, drop this packet */
		brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
					true);
	} else {
		/*
		 * Mark suppressed to avoid a double free during
		 * wlfc cleanup
		 */
		brcmf_fws_hanger_mark_suppressed(&fws->hanger, hslot);
	}

	return ret;
}

static int
brcmf_fws_txs_process(struct brcmf_fws_info *fws, u8 flags, u32 hslot,
		      u32 genbit, u16 seq)
{
	u32 fifo;
	int ret;
	bool remove_from_hanger = true;
	struct sk_buff *skb;
	struct brcmf_skbuff_cb *skcb;
	struct brcmf_fws_mac_descriptor *entry = NULL;

	brcmf_dbg(DATA, "flags %d\n", flags);

	if (flags == BRCMF_FWS_TXSTATUS_DISCARD)
		fws->stats.txs_discard++;
	else if (flags == BRCMF_FWS_TXSTATUS_CORE_SUPPRESS) {
		fws->stats.txs_supp_core++;
		remove_from_hanger = false;
	} else if (flags == BRCMF_FWS_TXSTATUS_FW_PS_SUPPRESS) {
		fws->stats.txs_supp_ps++;
		remove_from_hanger = false;
	} else if (flags == BRCMF_FWS_TXSTATUS_FW_TOSSED)
		fws->stats.txs_tossed++;
	else if (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)
		fws->stats.txs_host_tossed++;
	else
		brcmf_err("unexpected txstatus\n");

	ret = brcmf_fws_hanger_poppkt(&fws->hanger, hslot, &skb,
				      remove_from_hanger);
	if (ret != 0) {
		brcmf_err("no packet in hanger slot: hslot=%d\n", hslot);
		return ret;
	}

	skcb = brcmf_skbcb(skb);
	entry = skcb->mac;
	if (WARN_ON(!entry)) {
		brcmu_pkt_buf_free_skb(skb);
		return -EINVAL;
	}
	entry->transit_count--;
	if (entry->suppressed && entry->suppr_transit_count)
		entry->suppr_transit_count--;

	brcmf_dbg(DATA, "%s flags %d htod %X seq %X\n", entry->name, flags,
		  skcb->htod, seq);

	/* pick up the implicit credit from this packet */
	fifo = brcmf_skb_htod_tag_get_field(skb, FIFO);
	if ((fws->fcmode == BRCMF_FWS_FCMODE_IMPLIED_CREDIT) ||
	    (brcmf_skb_if_flags_get_field(skb, REQ_CREDIT)) ||
	    (flags == BRCMF_FWS_TXSTATUS_HOST_TOSSED)) {
		brcmf_fws_return_credits(fws, fifo, 1);
		brcmf_fws_schedule_deq(fws);
	}
	brcmf_fws_macdesc_return_req_credit(skb);

	if (!remove_from_hanger)
		ret = brcmf_fws_txstatus_suppressed(fws, fifo, skb, genbit,
						    seq);

	if (remove_from_hanger || ret)
		brcmf_txfinalize(fws->drvr, skb, true);

	return 0;
}

static int brcmf_fws_fifocreditback_indicate(struct brcmf_fws_info *fws,
					     u8 *data)
{
	int i;

	if (fws->fcmode != BRCMF_FWS_FCMODE_EXPLICIT_CREDIT) {
		brcmf_dbg(INFO, "ignored\n");
		return BRCMF_FWS_RET_OK_NOSCHEDULE;
	}

	brcmf_dbg(DATA, "enter: data %pM\n", data);
	brcmf_fws_lock(fws);
	for (i = 0; i < BRCMF_FWS_FIFO_COUNT; i++)
		brcmf_fws_return_credits(fws, i, data[i]);

	brcmf_dbg(DATA, "map: credit %x delay %x\n", fws->fifo_credit_map,
		  fws->fifo_delay_map);
	brcmf_fws_unlock(fws);
	return BRCMF_FWS_RET_OK_SCHEDULE;
}

static int brcmf_fws_txstatus_indicate(struct brcmf_fws_info *fws, u8 *data)
{
	__le32 status_le;
	__le16 seq_le;
	u32 status;
	u32 hslot;
	u32 genbit;
	u8 flags;
	u16 seq;

	fws->stats.txs_indicate++;
	memcpy(&status_le, data, sizeof(status_le));
	status = le32_to_cpu(status_le);
	flags = brcmf_txstatus_get_field(status, FLAGS);
	hslot = brcmf_txstatus_get_field(status, HSLOT);
	genbit = brcmf_txstatus_get_field(status, GENERATION);
	if (BRCMF_FWS_MODE_GET_REUSESEQ(fws->mode)) {
		memcpy(&seq_le, &data[BRCMF_FWS_TYPE_PKTTAG_LEN],
		       sizeof(seq_le));
		seq = le16_to_cpu(seq_le);
	} else {
		seq = 0;
	}

	brcmf_fws_lock(fws);
	brcmf_fws_txs_process(fws, flags, hslot, genbit, seq);
	brcmf_fws_unlock(fws);
	return BRCMF_FWS_RET_OK_NOSCHEDULE;
}

static int brcmf_fws_dbg_seqnum_check(struct brcmf_fws_info *fws, u8 *data)
{
	__le32 timestamp;

	memcpy(&timestamp, &data[2], sizeof(timestamp));
	brcmf_dbg(CTL, "received: seq %d, timestamp %d\n", data[1],
		  le32_to_cpu(timestamp));
	return 0;
}

static int brcmf_fws_notify_credit_map(struct brcmf_if *ifp,
				       const struct brcmf_event_msg *e,
				       void *data)
{
	struct brcmf_fws_info *fws = ifp->drvr->fws;
	int i;
	u8 *credits = data;

	if (e->datalen < BRCMF_FWS_FIFO_COUNT) {
		brcmf_err("event payload too small (%d)\n", e->datalen);
		return -EINVAL;
	}
	if (fws->creditmap_received)
		return 0;

	fws->creditmap_received = true;

	brcmf_dbg(TRACE, "enter: credits %pM\n", credits);
	brcmf_fws_lock(fws);
	for (i = 0; i < ARRAY_SIZE(fws->fifo_credit); i++) {
		if (*credits)
			fws->fifo_credit_map |= 1 << i;
		else
			fws->fifo_credit_map &= ~(1 << i);
		fws->fifo_credit[i] = *credits++;
	}
	brcmf_fws_schedule_deq(fws);
	brcmf_fws_unlock(fws);
	return 0;
}

static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
						const struct brcmf_event_msg *e,
						void *data)
{
	struct brcmf_fws_info *fws = ifp->drvr->fws;

	brcmf_fws_lock(fws);
	if (fws)
		fws->bcmc_credit_check = true;
	brcmf_fws_unlock(fws);
	return 0;
}

int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len,
		      struct sk_buff *skb)
{
	struct brcmf_skb_reorder_data *rd;
	struct brcmf_fws_info *fws = drvr->fws;
	u8 *signal_data;
	s16 data_len;
	u8 type;
	u8 len;
	u8 *data;
	s32 status;
	s32 err;

	brcmf_dbg(HDRS, "enter: ifidx %d, skblen %u, sig %d\n",
		  ifidx, skb->len, signal_len);

	WARN_ON(signal_len > skb->len);

	if (!signal_len)
		return 0;
	/* if flow control disabled, skip to packet data and leave */
	if (!fws->fw_signals) {
		skb_pull(skb, signal_len);
		return 0;
	}

	fws->stats.header_pulls++;
	data_len = signal_len;
	signal_data = skb->data;

	status = BRCMF_FWS_RET_OK_NOSCHEDULE;
	while (data_len > 0) {
		/* extract tlv info */
		type = signal_data[0];

		/* FILLER type is actually not a TLV, but
		 * a single byte that can be skipped.
		 */
		if (type == BRCMF_FWS_TYPE_FILLER) {
			signal_data += 1;
			data_len -= 1;
			continue;
		}
		len = signal_data[1];
		data = signal_data + 2;

		brcmf_dbg(HDRS, "tlv type=%s (%d), len=%d (%d)\n",
			  brcmf_fws_get_tlv_name(type), type, len,
			  brcmf_fws_get_tlv_len(fws, type));

		/* abort parsing when length invalid */
		if (data_len < len + 2)
			break;

		if (len < brcmf_fws_get_tlv_len(fws, type))
			break;

		err = BRCMF_FWS_RET_OK_NOSCHEDULE;
		switch (type) {
		case BRCMF_FWS_TYPE_COMP_TXSTATUS:
			break;
		case BRCMF_FWS_TYPE_HOST_REORDER_RXPKTS:
			rd = (struct brcmf_skb_reorder_data *)skb->cb;
			rd->reorder = data;
			break;
		case BRCMF_FWS_TYPE_MACDESC_ADD:
		case BRCMF_FWS_TYPE_MACDESC_DEL:
			brcmf_fws_macdesc_indicate(fws, type, data);
			break;
		case BRCMF_FWS_TYPE_MAC_OPEN:
		case BRCMF_FWS_TYPE_MAC_CLOSE:
			err = brcmf_fws_macdesc_state_indicate(fws, type, data);
			break;
		case BRCMF_FWS_TYPE_INTERFACE_OPEN:
		case BRCMF_FWS_TYPE_INTERFACE_CLOSE:
			err = brcmf_fws_interface_state_indicate(fws, type,
								 data);
			break;
		case BRCMF_FWS_TYPE_MAC_REQUEST_CREDIT:
		case BRCMF_FWS_TYPE_MAC_REQUEST_PACKET:
			err = brcmf_fws_request_indicate(fws, type, data);
			break;
		case BRCMF_FWS_TYPE_TXSTATUS:
			brcmf_fws_txstatus_indicate(fws, data);
			break;
		case BRCMF_FWS_TYPE_FIFO_CREDITBACK:
			err = brcmf_fws_fifocreditback_indicate(fws, data);
			break;
		case BRCMF_FWS_TYPE_RSSI:
			brcmf_fws_rssi_indicate(fws, *data);
			break;
		case BRCMF_FWS_TYPE_TRANS_ID:
			brcmf_fws_dbg_seqnum_check(fws, data);
			break;
		case BRCMF_FWS_TYPE_PKTTAG:
		case BRCMF_FWS_TYPE_PENDING_TRAFFIC_BMP:
		default:
			fws->stats.tlv_invalid_type++;
			break;
		}
		if (err == BRCMF_FWS_RET_OK_SCHEDULE)
			status = BRCMF_FWS_RET_OK_SCHEDULE;
		signal_data += len + 2;
		data_len -= len + 2;
	}

	if (data_len != 0)
		fws->stats.tlv_parse_failed++;

	if (status == BRCMF_FWS_RET_OK_SCHEDULE)
		brcmf_fws_schedule_deq(fws);

	/* signalling processing result does
	 * not affect the actual ethernet packet.
	 */
	skb_pull(skb, signal_len);

	/* this may be a signal-only packet
	 */
	if (skb->len == 0)
		fws->stats.header_only_pkt++;

	return 0;
}

static void brcmf_fws_precommit_skb(struct brcmf_fws_info *fws, int fifo,
				   struct sk_buff *p)
{
	struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
	struct brcmf_fws_mac_descriptor *entry = skcb->mac;
	u8 flags;

	if (skcb->state != BRCMF_FWS_SKBSTATE_SUPPRESSED)
		brcmf_skb_htod_tag_set_field(p, GENERATION, entry->generation);
	flags = BRCMF_FWS_HTOD_FLAG_PKTFROMHOST;
	if (brcmf_skb_if_flags_get_field(p, REQUESTED)) {
		/*
		 * Indicate that this packet is being sent in response to an
		 * explicit request from the firmware side.
		 */
		flags |= BRCMF_FWS_HTOD_FLAG_PKT_REQUESTED;
	}
	brcmf_skb_htod_tag_set_field(p, FLAGS, flags);
	brcmf_fws_hdrpush(fws, p);
}

static void brcmf_fws_rollback_toq(struct brcmf_fws_info *fws,
				   struct sk_buff *skb, int fifo)
{
	struct brcmf_fws_mac_descriptor *entry;
	struct sk_buff *pktout;
	int qidx, hslot;
	int rc = 0;

	entry = brcmf_skbcb(skb)->mac;
	if (entry->occupied) {
		qidx = 2 * fifo;
		if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_SUPPRESSED)
			qidx++;

		pktout = brcmu_pktq_penq_head(&entry->psq, qidx, skb);
		if (pktout == NULL) {
			brcmf_err("%s queue %d full\n", entry->name, qidx);
			rc = -ENOSPC;
		}
	} else {
		brcmf_err("%s entry removed\n", entry->name);
		rc = -ENOENT;
	}

	if (rc) {
		fws->stats.rollback_failed++;
		hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
		brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED,
				      hslot, 0, 0);
	} else {
		fws->stats.rollback_success++;
		brcmf_fws_return_credits(fws, fifo, 1);
		brcmf_fws_macdesc_return_req_credit(skb);
	}
}

static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
{
	int lender_ac;

	if (time_after(fws->borrow_defer_timestamp, jiffies)) {
		fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
		return -ENAVAIL;
	}

	for (lender_ac = 0; lender_ac <= BRCMF_FWS_FIFO_AC_VO; lender_ac++) {
		if (fws->fifo_credit[lender_ac]) {
			fws->credits_borrowed[lender_ac]++;
			fws->fifo_credit[lender_ac]--;
			if (fws->fifo_credit[lender_ac] == 0)
				fws->fifo_credit_map &= ~(1 << lender_ac);
			fws->fifo_credit_map |= (1 << BRCMF_FWS_FIFO_AC_BE);
			brcmf_dbg(DATA, "borrow credit from: %d\n", lender_ac);
			return 0;
		}
	}
	fws->fifo_credit_map &= ~(1 << BRCMF_FWS_FIFO_AC_BE);
	return -ENAVAIL;
}

static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
				struct sk_buff *skb)
{
	struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
	struct brcmf_fws_mac_descriptor *entry;
	struct brcmf_bus *bus = fws->drvr->bus_if;
	int rc;
	u8 ifidx;

	entry = skcb->mac;
	if (IS_ERR(entry))
		return PTR_ERR(entry);

	brcmf_fws_precommit_skb(fws, fifo, skb);
	entry->transit_count++;
	if (entry->suppressed)
		entry->suppr_transit_count++;
	brcmf_fws_unlock(fws);
	rc = brcmf_bus_txdata(bus, skb);
	brcmf_fws_lock(fws);
	brcmf_dbg(DATA, "%s flags %X htod %X bus_tx %d\n", entry->name,
		  skcb->if_flags, skcb->htod, rc);
	if (rc < 0) {
		entry->transit_count--;
		if (entry->suppressed)
			entry->suppr_transit_count--;
		brcmf_proto_hdrpull(fws->drvr, false, &ifidx, skb);
		goto rollback;
	}

	fws->stats.pkt2bus++;
	fws->stats.send_pkts[fifo]++;
	if (brcmf_skb_if_flags_get_field(skb, REQUESTED))
		fws->stats.requested_sent[fifo]++;

	return rc;

rollback:
	brcmf_fws_rollback_toq(fws, skb, fifo);
	return rc;
}

static int brcmf_fws_assign_htod(struct brcmf_fws_info *fws, struct sk_buff *p,
				  int fifo)
{
	struct brcmf_skbuff_cb *skcb = brcmf_skbcb(p);
	int rc, hslot;

	skcb->htod = 0;
	skcb->htod_seq = 0;
	hslot = brcmf_fws_hanger_get_free_slot(&fws->hanger);
	brcmf_skb_htod_tag_set_field(p, HSLOT, hslot);
	brcmf_skb_htod_tag_set_field(p, FREERUN, skcb->mac->seq[fifo]);
	brcmf_skb_htod_tag_set_field(p, FIFO, fifo);
	rc = brcmf_fws_hanger_pushpkt(&fws->hanger, p, hslot);
	if (!rc)
		skcb->mac->seq[fifo]++;
	else
		fws->stats.generic_error++;
	return rc;
}

int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
{
	struct brcmf_pub *drvr = ifp->drvr;
	struct brcmf_fws_info *fws = drvr->fws;
	struct brcmf_skbuff_cb *skcb = brcmf_skbcb(skb);
	struct ethhdr *eh = (struct ethhdr *)(skb->data);
	int fifo = BRCMF_FWS_FIFO_BCMC;
	bool multicast = is_multicast_ether_addr(eh->h_dest);
	bool pae = eh->h_proto == htons(ETH_P_PAE);

	brcmf_dbg(DATA, "tx proto=0x%X\n", ntohs(eh->h_proto));
	/* determine the priority */
	if (!skb->priority)
		skb->priority = cfg80211_classify8021d(skb);

	drvr->tx_multicast += !!multicast;
	if (pae)
		atomic_inc(&ifp->pend_8021x_cnt);

	/* set control buffer information */
	skcb->if_flags = 0;
	skcb->state = BRCMF_FWS_SKBSTATE_NEW;
	brcmf_skb_if_flags_set_field(skb, INDEX, ifp->ifidx);
	if (!multicast)
		fifo = brcmf_fws_prio2fifo[skb->priority];

	brcmf_fws_lock(fws);
	if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
		fws->borrow_defer_timestamp = jiffies +
					      BRCMF_FWS_BORROW_DEFER_PERIOD;

	skcb->mac = brcmf_fws_macdesc_find(fws, ifp, eh->h_dest);
	brcmf_dbg(DATA, "%s mac %pM multi %d fifo %d\n", skcb->mac->name,
		  eh->h_dest, multicast, fifo);
	if (!brcmf_fws_assign_htod(fws, skb, fifo)) {
		brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
		brcmf_fws_schedule_deq(fws);
	} else {
		brcmf_err("drop skb: no hanger slot\n");
		if (pae) {
			atomic_dec(&ifp->pend_8021x_cnt);
			if (waitqueue_active(&ifp->pend_8021x_wait))
				wake_up(&ifp->pend_8021x_wait);
		}
		brcmu_pkt_buf_free_skb(skb);
	}
	brcmf_fws_unlock(fws);
	return 0;
}

void brcmf_fws_reset_interface(struct brcmf_if *ifp)
{
	struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;

	brcmf_dbg(TRACE, "enter: idx=%d\n", ifp->bssidx);
	if (!entry)
		return;

	brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
}

void brcmf_fws_add_interface(struct brcmf_if *ifp)
{
	struct brcmf_fws_info *fws = ifp->drvr->fws;
	struct brcmf_fws_mac_descriptor *entry;

	if (!ifp->ndev)
		return;

	entry = &fws->desc.iface[ifp->ifidx];
	ifp->fws_desc = entry;
	brcmf_fws_macdesc_init(entry, ifp->mac_addr, ifp->ifidx);
	brcmf_fws_macdesc_set_name(fws, entry);
	brcmu_pktq_init(&entry->psq, BRCMF_FWS_PSQ_PREC_COUNT,
			BRCMF_FWS_PSQ_LEN);
	brcmf_dbg(TRACE, "added %s\n", entry->name);
}

void brcmf_fws_del_interface(struct brcmf_if *ifp)
{
	struct brcmf_fws_mac_descriptor *entry = ifp->fws_desc;

	if (!entry)
		return;

	brcmf_fws_lock(ifp->drvr->fws);
	ifp->fws_desc = NULL;
	brcmf_dbg(TRACE, "deleting %s\n", entry->name);
	brcmf_fws_macdesc_deinit(entry);
	brcmf_fws_cleanup(ifp->drvr->fws, ifp->ifidx);
	brcmf_fws_unlock(ifp->drvr->fws);
}

static void brcmf_fws_dequeue_worker(struct work_struct *worker)
{
	struct brcmf_fws_info *fws;
	struct brcmf_pub *drvr;
	struct sk_buff *skb;
	int fifo;
	u32 hslot;
	u32 ifidx;
	int ret;

	fws = container_of(worker, struct brcmf_fws_info, fws_dequeue_work);
	drvr = fws->drvr;

	brcmf_fws_lock(fws);
	for (fifo = BRCMF_FWS_FIFO_BCMC; fifo >= 0 && !fws->bus_flow_blocked;
	     fifo--) {
		if (!brcmf_fws_fc_active(fws)) {
			while ((skb = brcmf_fws_deq(fws, fifo)) != NULL) {
				hslot = brcmf_skb_htod_tag_get_field(skb,
								     HSLOT);
				brcmf_fws_hanger_poppkt(&fws->hanger, hslot,
							&skb, true);
				ifidx = brcmf_skb_if_flags_get_field(skb,
								     INDEX);
				brcmf_proto_hdrpush(drvr, ifidx, 0, skb);
				/* Use bus module to send data frame */
				brcmf_fws_unlock(fws);
				ret = brcmf_bus_txdata(drvr->bus_if, skb);
				brcmf_fws_lock(fws);
				if (ret < 0)
					brcmf_txfinalize(drvr, skb, false);
				if (fws->bus_flow_blocked)
					break;
			}
			continue;
		}
		while ((fws->fifo_credit[fifo]) || ((!fws->bcmc_credit_check) &&
		       (fifo == BRCMF_FWS_FIFO_BCMC))) {
			skb = brcmf_fws_deq(fws, fifo);
			if (!skb)
				break;
			fws->fifo_credit[fifo]--;
			if (brcmf_fws_commit_skb(fws, fifo, skb))
				break;
			if (fws->bus_flow_blocked)
				break;
		}
		if ((fifo == BRCMF_FWS_FIFO_AC_BE) &&
		    (fws->fifo_credit[fifo] == 0) &&
		    (!fws->bus_flow_blocked)) {
			while (brcmf_fws_borrow_credit(fws) == 0) {
				skb = brcmf_fws_deq(fws, fifo);
				if (!skb) {
					brcmf_fws_return_credits(fws, fifo, 1);
					break;
				}
				if (brcmf_fws_commit_skb(fws, fifo, skb))
					break;
				if (fws->bus_flow_blocked)
					break;
			}
		}
	}
	brcmf_fws_unlock(fws);
}

int brcmf_fws_init(struct brcmf_pub *drvr)
{
	struct brcmf_fws_info *fws;
	u32 tlv = BRCMF_FWS_FLAGS_RSSI_SIGNALS;
	int rc;
	u32 mode;

	drvr->fws = kzalloc(sizeof(*(drvr->fws)), GFP_KERNEL);
	if (!drvr->fws) {
		rc = -ENOMEM;
		goto fail;
	}

	fws = drvr->fws;

	spin_lock_init(&fws->spinlock);

	/* set linkage back */
	fws->drvr = drvr;
	fws->fcmode = fcmode;

	fws->fws_wq = create_singlethread_workqueue("brcmf_fws_wq");
	if (fws->fws_wq == NULL) {
		brcmf_err("workqueue creation failed\n");
		rc = -EBADF;
		goto fail;
	}
	INIT_WORK(&fws->fws_dequeue_work, brcmf_fws_dequeue_worker);

	/* enable firmware signalling if fcmode active */
	if (fws->fcmode != BRCMF_FWS_FCMODE_NONE)
		tlv |= BRCMF_FWS_FLAGS_XONXOFF_SIGNALS |
		       BRCMF_FWS_FLAGS_CREDIT_STATUS_SIGNALS |
		       BRCMF_FWS_FLAGS_HOST_PROPTXSTATUS_ACTIVE |
		       BRCMF_FWS_FLAGS_HOST_RXREORDER_ACTIVE;

	rc = brcmf_fweh_register(drvr, BRCMF_E_FIFO_CREDIT_MAP,
				 brcmf_fws_notify_credit_map);
	if (rc < 0) {
		brcmf_err("register credit map handler failed\n");
		goto fail;
	}
	rc = brcmf_fweh_register(drvr, BRCMF_E_BCMC_CREDIT_SUPPORT,
				 brcmf_fws_notify_bcmc_credit_support);
	if (rc < 0) {
		brcmf_err("register bcmc credit handler failed\n");
		brcmf_fweh_unregister(drvr, BRCMF_E_FIFO_CREDIT_MAP);
		goto fail;
	}

	/* Setting the iovar may fail if feature is unsupported
	 * so leave the rc as is so driver initialization can
	 * continue. Set mode back to none indicating not enabled.
	 */
	fws->fw_signals = true;
	if (brcmf_fil_iovar_int_set(drvr->iflist[0], "tlv", tlv)) {
		brcmf_err("failed to set bdcv2 tlv signaling\n");
		fws->fcmode = BRCMF_FWS_FCMODE_NONE;
		fws->fw_signals = false;
	}

	if (brcmf_fil_iovar_int_set(drvr->iflist[0], "ampdu_hostreorder", 1))
		brcmf_dbg(INFO, "enabling AMPDU host-reorder failed\n");

	/* Enable seq number reuse, if supported */
	if (brcmf_fil_iovar_int_get(drvr->iflist[0], "wlfc_mode", &mode) == 0) {
		if (BRCMF_FWS_MODE_GET_REUSESEQ(mode)) {
			mode = 0;
			BRCMF_FWS_MODE_SET_REUSESEQ(mode, 1);
			if (brcmf_fil_iovar_int_set(drvr->iflist[0],
						    "wlfc_mode", mode) == 0) {
				BRCMF_FWS_MODE_SET_REUSESEQ(fws->mode, 1);
			}
		}
	}

	brcmf_fws_hanger_init(&fws->hanger);
	brcmf_fws_macdesc_init(&fws->desc.other, NULL, 0);
	brcmf_fws_macdesc_set_name(fws, &fws->desc.other);
	brcmu_pktq_init(&fws->desc.other.psq, BRCMF_FWS_PSQ_PREC_COUNT,
			BRCMF_FWS_PSQ_LEN);

	/* create debugfs file for statistics */
	brcmf_debugfs_create_fws_stats(drvr, &fws->stats);

	brcmf_dbg(INFO, "%s bdcv2 tlv signaling [%x]\n",
		  fws->fw_signals ? "enabled" : "disabled", tlv);
	return 0;

fail:
	brcmf_fws_deinit(drvr);
	return rc;
}

void brcmf_fws_deinit(struct brcmf_pub *drvr)
{
	struct brcmf_fws_info *fws = drvr->fws;

	if (!fws)
		return;

	if (drvr->fws->fws_wq)
		destroy_workqueue(drvr->fws->fws_wq);

	/* cleanup */
	brcmf_fws_lock(fws);
	brcmf_fws_cleanup(fws, -1);
	drvr->fws = NULL;
	brcmf_fws_unlock(fws);

	/* free top structure */
	kfree(fws);
}

bool brcmf_fws_fc_active(struct brcmf_fws_info *fws)
{
	if (!fws->creditmap_received)
		return false;

	return fws->fcmode != BRCMF_FWS_FCMODE_NONE;
}

void brcmf_fws_bustxfail(struct brcmf_fws_info *fws, struct sk_buff *skb)
{
	u32 hslot;

	if (brcmf_skbcb(skb)->state == BRCMF_FWS_SKBSTATE_TIM) {
		brcmu_pkt_buf_free_skb(skb);
		return;
	}
	brcmf_fws_lock(fws);
	hslot = brcmf_skb_htod_tag_get_field(skb, HSLOT);
	brcmf_fws_txs_process(fws, BRCMF_FWS_TXSTATUS_HOST_TOSSED, hslot, 0, 0);
	brcmf_fws_unlock(fws);
}

void brcmf_fws_bus_blocked(struct brcmf_pub *drvr, bool flow_blocked)
{
	struct brcmf_fws_info *fws = drvr->fws;

	fws->bus_flow_blocked = flow_blocked;
	if (!flow_blocked)
		brcmf_fws_schedule_deq(fws);
	else
		fws->stats.bus_flow_block++;
}