summaryrefslogtreecommitdiffstats
path: root/net/mac80211/util.c
blob: 259698de569ffa6a93c2738f85d6fd6af142eb9a (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
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright (C) 2015-2017	Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * utilities for mac80211
 */

#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/export.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
#include <linux/crc32.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>

#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
#include "led.h"
#include "wep.h"

/* privid for wiphys to determine whether they belong to us or not */
const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;

struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
	struct ieee80211_local *local;
	BUG_ON(!wiphy);

	local = wiphy_priv(wiphy);
	return &local->hw;
}
EXPORT_SYMBOL(wiphy_to_ieee80211_hw);

void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
{
	struct sk_buff *skb;
	struct ieee80211_hdr *hdr;

	skb_queue_walk(&tx->skbs, skb) {
		hdr = (struct ieee80211_hdr *) skb->data;
		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	}
}

int ieee80211_frame_duration(enum nl80211_band band, size_t len,
			     int rate, int erp, int short_preamble,
			     int shift)
{
	int dur;

	/* calculate duration (in microseconds, rounded up to next higher
	 * integer if it includes a fractional microsecond) to send frame of
	 * len bytes (does not include FCS) at the given rate. Duration will
	 * also include SIFS.
	 *
	 * rate is in 100 kbps, so divident is multiplied by 10 in the
	 * DIV_ROUND_UP() operations.
	 *
	 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
	 * is assumed to be 0 otherwise.
	 */

	if (band == NL80211_BAND_5GHZ || erp) {
		/*
		 * OFDM:
		 *
		 * N_DBPS = DATARATE x 4
		 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
		 *	(16 = SIGNAL time, 6 = tail bits)
		 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
		 *
		 * T_SYM = 4 usec
		 * 802.11a - 18.5.2: aSIFSTime = 16 usec
		 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
		 *	signal ext = 6 usec
		 */
		dur = 16; /* SIFS + signal ext */
		dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
		dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */

		/* IEEE 802.11-2012 18.3.2.4: all values above are:
		 *  * times 4 for 5 MHz
		 *  * times 2 for 10 MHz
		 */
		dur *= 1 << shift;

		/* rates should already consider the channel bandwidth,
		 * don't apply divisor again.
		 */
		dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
					4 * rate); /* T_SYM x N_SYM */
	} else {
		/*
		 * 802.11b or 802.11g with 802.11b compatibility:
		 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
		 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
		 *
		 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
		 * aSIFSTime = 10 usec
		 * aPreambleLength = 144 usec or 72 usec with short preamble
		 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
		 */
		dur = 10; /* aSIFSTime = 10 usec */
		dur += short_preamble ? (72 + 24) : (144 + 48);

		dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
	}

	return dur;
}

/* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
					enum nl80211_band band,
					size_t frame_len,
					struct ieee80211_rate *rate)
{
	struct ieee80211_sub_if_data *sdata;
	u16 dur;
	int erp, shift = 0;
	bool short_preamble = false;

	erp = 0;
	if (vif) {
		sdata = vif_to_sdata(vif);
		short_preamble = sdata->vif.bss_conf.use_short_preamble;
		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
		shift = ieee80211_vif_get_shift(vif);
	}

	dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
				       short_preamble, shift);

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);

__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, size_t frame_len,
			      const struct ieee80211_tx_info *frame_txctl)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
	struct ieee80211_sub_if_data *sdata;
	bool short_preamble;
	int erp, shift = 0, bitrate;
	u16 dur;
	struct ieee80211_supported_band *sband;

	sband = local->hw.wiphy->bands[frame_txctl->band];

	short_preamble = false;

	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];

	erp = 0;
	if (vif) {
		sdata = vif_to_sdata(vif);
		short_preamble = sdata->vif.bss_conf.use_short_preamble;
		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
		shift = ieee80211_vif_get_shift(vif);
	}

	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);

	/* CTS duration */
	dur = ieee80211_frame_duration(sband->band, 10, bitrate,
				       erp, short_preamble, shift);
	/* Data frame duration */
	dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
					erp, short_preamble, shift);
	/* ACK duration */
	dur += ieee80211_frame_duration(sband->band, 10, bitrate,
					erp, short_preamble, shift);

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);

__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    size_t frame_len,
				    const struct ieee80211_tx_info *frame_txctl)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
	struct ieee80211_sub_if_data *sdata;
	bool short_preamble;
	int erp, shift = 0, bitrate;
	u16 dur;
	struct ieee80211_supported_band *sband;

	sband = local->hw.wiphy->bands[frame_txctl->band];

	short_preamble = false;

	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
	erp = 0;
	if (vif) {
		sdata = vif_to_sdata(vif);
		short_preamble = sdata->vif.bss_conf.use_short_preamble;
		if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
			erp = rate->flags & IEEE80211_RATE_ERP_G;
		shift = ieee80211_vif_get_shift(vif);
	}

	bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);

	/* Data frame duration */
	dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
				       erp, short_preamble, shift);
	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
		/* ACK duration */
		dur += ieee80211_frame_duration(sband->band, 10, bitrate,
						erp, short_preamble, shift);
	}

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);

void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
{
	struct ieee80211_sub_if_data *sdata;
	int n_acs = IEEE80211_NUM_ACS;

	if (local->ops->wake_tx_queue)
		return;

	if (local->hw.queues < IEEE80211_NUM_ACS)
		n_acs = 1;

	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		int ac;

		if (!sdata->dev)
			continue;

		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
		    local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
			continue;

		for (ac = 0; ac < n_acs; ac++) {
			int ac_queue = sdata->vif.hw_queue[ac];

			if (ac_queue == queue ||
			    (sdata->vif.cab_queue == queue &&
			     local->queue_stop_reasons[ac_queue] == 0 &&
			     skb_queue_empty(&local->pending[ac_queue])))
				netif_wake_subqueue(sdata->dev, ac);
		}
	}
}

static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
				   enum queue_stop_reason reason,
				   bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);

	trace_wake_queue(local, queue, reason);

	if (WARN_ON(queue >= hw->queues))
		return;

	if (!test_bit(reason, &local->queue_stop_reasons[queue]))
		return;

	if (!refcounted) {
		local->q_stop_reasons[queue][reason] = 0;
	} else {
		local->q_stop_reasons[queue][reason]--;
		if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
			local->q_stop_reasons[queue][reason] = 0;
	}

	if (local->q_stop_reasons[queue][reason] == 0)
		__clear_bit(reason, &local->queue_stop_reasons[queue]);

	if (local->queue_stop_reasons[queue] != 0)
		/* someone still has this queue stopped */
		return;

	if (skb_queue_empty(&local->pending[queue])) {
		rcu_read_lock();
		ieee80211_propagate_queue_wake(local, queue);
		rcu_read_unlock();
	} else
		tasklet_schedule(&local->tx_pending_tasklet);
}

void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason,
				    bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_wake_queue(hw, queue, reason, refcounted);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
	ieee80211_wake_queue_by_reason(hw, queue,
				       IEEE80211_QUEUE_STOP_REASON_DRIVER,
				       false);
}
EXPORT_SYMBOL(ieee80211_wake_queue);

static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
				   enum queue_stop_reason reason,
				   bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;
	int n_acs = IEEE80211_NUM_ACS;

	trace_stop_queue(local, queue, reason);

	if (WARN_ON(queue >= hw->queues))
		return;

	if (!refcounted)
		local->q_stop_reasons[queue][reason] = 1;
	else
		local->q_stop_reasons[queue][reason]++;

	if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
		return;

	if (local->ops->wake_tx_queue)
		return;

	if (local->hw.queues < IEEE80211_NUM_ACS)
		n_acs = 1;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		int ac;

		if (!sdata->dev)
			continue;

		for (ac = 0; ac < n_acs; ac++) {
			if (sdata->vif.hw_queue[ac] == queue ||
			    sdata->vif.cab_queue == queue)
				netif_stop_subqueue(sdata->dev, ac);
		}
	}
	rcu_read_unlock();
}

void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
				    enum queue_stop_reason reason,
				    bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_stop_queue(hw, queue, reason, refcounted);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
	ieee80211_stop_queue_by_reason(hw, queue,
				       IEEE80211_QUEUE_STOP_REASON_DRIVER,
				       false);
}
EXPORT_SYMBOL(ieee80211_stop_queue);

void ieee80211_add_pending_skb(struct ieee80211_local *local,
			       struct sk_buff *skb)
{
	struct ieee80211_hw *hw = &local->hw;
	unsigned long flags;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	int queue = info->hw_queue;

	if (WARN_ON(!info->control.vif)) {
		ieee80211_free_txskb(&local->hw, skb);
		return;
	}

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
			       false);
	__skb_queue_tail(&local->pending[queue], skb);
	__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
			       false);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_add_pending_skbs(struct ieee80211_local *local,
				struct sk_buff_head *skbs)
{
	struct ieee80211_hw *hw = &local->hw;
	struct sk_buff *skb;
	unsigned long flags;
	int queue, i;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	while ((skb = skb_dequeue(skbs))) {
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

		if (WARN_ON(!info->control.vif)) {
			ieee80211_free_txskb(&local->hw, skb);
			continue;
		}

		queue = info->hw_queue;

		__ieee80211_stop_queue(hw, queue,
				IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
				false);

		__skb_queue_tail(&local->pending[queue], skb);
	}

	for (i = 0; i < hw->queues; i++)
		__ieee80211_wake_queue(hw, i,
			IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
			false);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
				     unsigned long queues,
				     enum queue_stop_reason reason,
				     bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;
	int i;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

	for_each_set_bit(i, &queues, hw->queues)
		__ieee80211_stop_queue(hw, i, reason, refcounted);

	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_DRIVER,
					false);
}
EXPORT_SYMBOL(ieee80211_stop_queues);

int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;
	int ret;

	if (WARN_ON(queue >= hw->queues))
		return true;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
		       &local->queue_stop_reasons[queue]);
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
	return ret;
}
EXPORT_SYMBOL(ieee80211_queue_stopped);

void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
				     unsigned long queues,
				     enum queue_stop_reason reason,
				     bool refcounted)
{
	struct ieee80211_local *local = hw_to_local(hw);
	unsigned long flags;
	int i;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);

	for_each_set_bit(i, &queues, hw->queues)
		__ieee80211_wake_queue(hw, i, reason, refcounted);

	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}

void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_DRIVER,
					false);
}
EXPORT_SYMBOL(ieee80211_wake_queues);

static unsigned int
ieee80211_get_vif_queues(struct ieee80211_local *local,
			 struct ieee80211_sub_if_data *sdata)
{
	unsigned int queues;

	if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
		int ac;

		queues = 0;

		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
			queues |= BIT(sdata->vif.hw_queue[ac]);
		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
			queues |= BIT(sdata->vif.cab_queue);
	} else {
		/* all queues */
		queues = BIT(local->hw.queues) - 1;
	}

	return queues;
}

void __ieee80211_flush_queues(struct ieee80211_local *local,
			      struct ieee80211_sub_if_data *sdata,
			      unsigned int queues, bool drop)
{
	if (!local->ops->flush)
		return;

	/*
	 * If no queue was set, or if the HW doesn't support
	 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
	 */
	if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
		queues = ieee80211_get_vif_queues(local, sdata);

	ieee80211_stop_queues_by_reason(&local->hw, queues,
					IEEE80211_QUEUE_STOP_REASON_FLUSH,
					false);

	drv_flush(local, sdata, queues, drop);

	ieee80211_wake_queues_by_reason(&local->hw, queues,
					IEEE80211_QUEUE_STOP_REASON_FLUSH,
					false);
}

void ieee80211_flush_queues(struct ieee80211_local *local,
			    struct ieee80211_sub_if_data *sdata, bool drop)
{
	__ieee80211_flush_queues(local, sdata, 0, drop);
}

void ieee80211_stop_vif_queues(struct ieee80211_local *local,
			       struct ieee80211_sub_if_data *sdata,
			       enum queue_stop_reason reason)
{
	ieee80211_stop_queues_by_reason(&local->hw,
					ieee80211_get_vif_queues(local, sdata),
					reason, true);
}

void ieee80211_wake_vif_queues(struct ieee80211_local *local,
			       struct ieee80211_sub_if_data *sdata,
			       enum queue_stop_reason reason)
{
	ieee80211_wake_queues_by_reason(&local->hw,
					ieee80211_get_vif_queues(local, sdata),
					reason, true);
}

static void __iterate_interfaces(struct ieee80211_local *local,
				 u32 iter_flags,
				 void (*iterator)(void *data, u8 *mac,
						  struct ieee80211_vif *vif),
				 void *data)
{
	struct ieee80211_sub_if_data *sdata;
	bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;

	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		switch (sdata->vif.type) {
		case NL80211_IFTYPE_MONITOR:
			if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
				continue;
			break;
		case NL80211_IFTYPE_AP_VLAN:
			continue;
		default:
			break;
		}
		if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
		    active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
			continue;
		if (ieee80211_sdata_running(sdata) || !active_only)
			iterator(data, sdata->vif.addr,
				 &sdata->vif);
	}

	sdata = rcu_dereference_check(local->monitor_sdata,
				      lockdep_is_held(&local->iflist_mtx) ||
				      lockdep_rtnl_is_held());
	if (sdata &&
	    (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
	     sdata->flags & IEEE80211_SDATA_IN_DRIVER))
		iterator(data, sdata->vif.addr, &sdata->vif);
}

void ieee80211_iterate_interfaces(
	struct ieee80211_hw *hw, u32 iter_flags,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);

	mutex_lock(&local->iflist_mtx);
	__iterate_interfaces(local, iter_flags, iterator, data);
	mutex_unlock(&local->iflist_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);

void ieee80211_iterate_active_interfaces_atomic(
	struct ieee80211_hw *hw, u32 iter_flags,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);

	rcu_read_lock();
	__iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
			     iterator, data);
	rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);

void ieee80211_iterate_active_interfaces_rtnl(
	struct ieee80211_hw *hw, u32 iter_flags,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);

	ASSERT_RTNL();

	__iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
			     iterator, data);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);

static void __iterate_stations(struct ieee80211_local *local,
			       void (*iterator)(void *data,
						struct ieee80211_sta *sta),
			       void *data)
{
	struct sta_info *sta;

	list_for_each_entry_rcu(sta, &local->sta_list, list) {
		if (!sta->uploaded)
			continue;

		iterator(data, &sta->sta);
	}
}

void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
			void (*iterator)(void *data,
					 struct ieee80211_sta *sta),
			void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);

	rcu_read_lock();
	__iterate_stations(local, iterator, data);
	rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);

struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);

	if (!ieee80211_sdata_running(sdata) ||
	    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
		return NULL;
	return &sdata->vif;
}
EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);

struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata;

	if (!vif)
		return NULL;

	sdata = vif_to_sdata(vif);

	if (!ieee80211_sdata_running(sdata) ||
	    !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
		return NULL;

	return &sdata->wdev;
}
EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);

/*
 * Nothing should have been stuffed into the workqueue during
 * the suspend->resume cycle. Since we can't check each caller
 * of this function if we are already quiescing / suspended,
 * check here and don't WARN since this can actually happen when
 * the rx path (for example) is racing against __ieee80211_suspend
 * and suspending / quiescing was set after the rx path checked
 * them.
 */
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
{
	if (local->quiescing || (local->suspended && !local->resuming)) {
		pr_warn("queueing ieee80211 work while going to suspend\n");
		return false;
	}

	return true;
}

void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
{
	struct ieee80211_local *local = hw_to_local(hw);

	if (!ieee80211_can_queue_work(local))
		return;

	queue_work(local->workqueue, work);
}
EXPORT_SYMBOL(ieee80211_queue_work);

void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
				  struct delayed_work *dwork,
				  unsigned long delay)
{
	struct ieee80211_local *local = hw_to_local(hw);

	if (!ieee80211_can_queue_work(local))
		return;

	queue_delayed_work(local->workqueue, dwork, delay);
}
EXPORT_SYMBOL(ieee80211_queue_delayed_work);

u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
			       struct ieee802_11_elems *elems,
			       u64 filter, u32 crc)
{
	size_t left = len;
	const u8 *pos = start;
	bool calc_crc = filter != 0;
	DECLARE_BITMAP(seen_elems, 256);
	const u8 *ie;

	bitmap_zero(seen_elems, 256);
	memset(elems, 0, sizeof(*elems));
	elems->ie_start = start;
	elems->total_len = len;

	while (left >= 2) {
		u8 id, elen;
		bool elem_parse_failed;

		id = *pos++;
		elen = *pos++;
		left -= 2;

		if (elen > left) {
			elems->parse_error = true;
			break;
		}

		switch (id) {
		case WLAN_EID_SSID:
		case WLAN_EID_SUPP_RATES:
		case WLAN_EID_FH_PARAMS:
		case WLAN_EID_DS_PARAMS:
		case WLAN_EID_CF_PARAMS:
		case WLAN_EID_TIM:
		case WLAN_EID_IBSS_PARAMS:
		case WLAN_EID_CHALLENGE:
		case WLAN_EID_RSN:
		case WLAN_EID_ERP_INFO:
		case WLAN_EID_EXT_SUPP_RATES:
		case WLAN_EID_HT_CAPABILITY:
		case WLAN_EID_HT_OPERATION:
		case WLAN_EID_VHT_CAPABILITY:
		case WLAN_EID_VHT_OPERATION:
		case WLAN_EID_MESH_ID:
		case WLAN_EID_MESH_CONFIG:
		case WLAN_EID_PEER_MGMT:
		case WLAN_EID_PREQ:
		case WLAN_EID_PREP:
		case WLAN_EID_PERR:
		case WLAN_EID_RANN:
		case WLAN_EID_CHANNEL_SWITCH:
		case WLAN_EID_EXT_CHANSWITCH_ANN:
		case WLAN_EID_COUNTRY:
		case WLAN_EID_PWR_CONSTRAINT:
		case WLAN_EID_TIMEOUT_INTERVAL:
		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
		case WLAN_EID_CHAN_SWITCH_PARAM:
		case WLAN_EID_EXT_CAPABILITY:
		case WLAN_EID_CHAN_SWITCH_TIMING:
		case WLAN_EID_LINK_ID:
		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
		/*
		 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
		 * that if the content gets bigger it might be needed more than once
		 */
			if (test_bit(id, seen_elems)) {
				elems->parse_error = true;
				left -= elen;
				pos += elen;
				continue;
			}
			break;
		}

		if (calc_crc && id < 64 && (filter & (1ULL << id)))
			crc = crc32_be(crc, pos - 2, elen + 2);

		elem_parse_failed = false;

		switch (id) {
		case WLAN_EID_LINK_ID:
			if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
				elem_parse_failed = true;
				break;
			}
			elems->lnk_id = (void *)(pos - 2);
			break;
		case WLAN_EID_CHAN_SWITCH_TIMING:
			if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
				elem_parse_failed = true;
				break;
			}
			elems->ch_sw_timing = (void *)pos;
			break;
		case WLAN_EID_EXT_CAPABILITY:
			elems->ext_capab = pos;
			elems->ext_capab_len = elen;
			break;
		case WLAN_EID_SSID:
			elems->ssid = pos;
			elems->ssid_len = elen;
			break;
		case WLAN_EID_SUPP_RATES:
			elems->supp_rates = pos;
			elems->supp_rates_len = elen;
			break;
		case WLAN_EID_DS_PARAMS:
			if (elen >= 1)
				elems->ds_params = pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_TIM:
			if (elen >= sizeof(struct ieee80211_tim_ie)) {
				elems->tim = (void *)pos;
				elems->tim_len = elen;
			} else
				elem_parse_failed = true;
			break;
		case WLAN_EID_CHALLENGE:
			elems->challenge = pos;
			elems->challenge_len = elen;
			break;
		case WLAN_EID_VENDOR_SPECIFIC:
			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
			    pos[2] == 0xf2) {
				/* Microsoft OUI (00:50:F2) */

				if (calc_crc)
					crc = crc32_be(crc, pos - 2, elen + 2);

				if (elen >= 5 && pos[3] == 2) {
					/* OUI Type 2 - WMM IE */
					if (pos[4] == 0) {
						elems->wmm_info = pos;
						elems->wmm_info_len = elen;
					} else if (pos[4] == 1) {
						elems->wmm_param = pos;
						elems->wmm_param_len = elen;
					}
				}
			}
			break;
		case WLAN_EID_RSN:
			elems->rsn = pos;
			elems->rsn_len = elen;
			break;
		case WLAN_EID_ERP_INFO:
			if (elen >= 1)
				elems->erp_info = pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_EXT_SUPP_RATES:
			elems->ext_supp_rates = pos;
			elems->ext_supp_rates_len = elen;
			break;
		case WLAN_EID_HT_CAPABILITY:
			if (elen >= sizeof(struct ieee80211_ht_cap))
				elems->ht_cap_elem = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_HT_OPERATION:
			if (elen >= sizeof(struct ieee80211_ht_operation))
				elems->ht_operation = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_VHT_CAPABILITY:
			if (elen >= sizeof(struct ieee80211_vht_cap))
				elems->vht_cap_elem = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_VHT_OPERATION:
			if (elen >= sizeof(struct ieee80211_vht_operation))
				elems->vht_operation = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_OPMODE_NOTIF:
			if (elen > 0)
				elems->opmode_notif = pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_MESH_ID:
			elems->mesh_id = pos;
			elems->mesh_id_len = elen;
			break;
		case WLAN_EID_MESH_CONFIG:
			if (elen >= sizeof(struct ieee80211_meshconf_ie))
				elems->mesh_config = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_PEER_MGMT:
			elems->peering = pos;
			elems->peering_len = elen;
			break;
		case WLAN_EID_MESH_AWAKE_WINDOW:
			if (elen >= 2)
				elems->awake_window = (void *)pos;
			break;
		case WLAN_EID_PREQ:
			elems->preq = pos;
			elems->preq_len = elen;
			break;
		case WLAN_EID_PREP:
			elems->prep = pos;
			elems->prep_len = elen;
			break;
		case WLAN_EID_PERR:
			elems->perr = pos;
			elems->perr_len = elen;
			break;
		case WLAN_EID_RANN:
			if (elen >= sizeof(struct ieee80211_rann_ie))
				elems->rann = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_CHANNEL_SWITCH:
			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->ch_switch_ie = (void *)pos;
			break;
		case WLAN_EID_EXT_CHANSWITCH_ANN:
			if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->ext_chansw_ie = (void *)pos;
			break;
		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
			if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->sec_chan_offs = (void *)pos;
			break;
		case WLAN_EID_CHAN_SWITCH_PARAM:
			if (elen !=
			    sizeof(*elems->mesh_chansw_params_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->mesh_chansw_params_ie = (void *)pos;
			break;
		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
			if (!action ||
			    elen != sizeof(*elems->wide_bw_chansw_ie)) {
				elem_parse_failed = true;
				break;
			}
			elems->wide_bw_chansw_ie = (void *)pos;
			break;
		case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
			if (action) {
				elem_parse_failed = true;
				break;
			}
			/*
			 * This is a bit tricky, but as we only care about
			 * the wide bandwidth channel switch element, so
			 * just parse it out manually.
			 */
			ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
					      pos, elen);
			if (ie) {
				if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
					elems->wide_bw_chansw_ie =
						(void *)(ie + 2);
				else
					elem_parse_failed = true;
			}
			break;
		case WLAN_EID_COUNTRY:
			elems->country_elem = pos;
			elems->country_elem_len = elen;
			break;
		case WLAN_EID_PWR_CONSTRAINT:
			if (elen != 1) {
				elem_parse_failed = true;
				break;
			}
			elems->pwr_constr_elem = pos;
			break;
		case WLAN_EID_CISCO_VENDOR_SPECIFIC:
			/* Lots of different options exist, but we only care
			 * about the Dynamic Transmit Power Control element.
			 * First check for the Cisco OUI, then for the DTPC
			 * tag (0x00).
			 */
			if (elen < 4) {
				elem_parse_failed = true;
				break;
			}

			if (pos[0] != 0x00 || pos[1] != 0x40 ||
			    pos[2] != 0x96 || pos[3] != 0x00)
				break;

			if (elen != 6) {
				elem_parse_failed = true;
				break;
			}

			if (calc_crc)
				crc = crc32_be(crc, pos - 2, elen + 2);

			elems->cisco_dtpc_elem = pos;
			break;
		case WLAN_EID_TIMEOUT_INTERVAL:
			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
				elems->timeout_int = (void *)pos;
			else
				elem_parse_failed = true;
			break;
		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
			if (elen >= sizeof(*elems->max_idle_period_ie))
				elems->max_idle_period_ie = (void *)pos;
			break;
		default:
			break;
		}

		if (elem_parse_failed)
			elems->parse_error = true;
		else
			__set_bit(id, seen_elems);

		left -= elen;
		pos += elen;
	}

	if (left != 0)
		elems->parse_error = true;

	return crc;
}

void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
			       bool bss_notify, bool enable_qos)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_tx_queue_params qparam;
	struct ieee80211_chanctx_conf *chanctx_conf;
	int ac;
	bool use_11b;
	bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
	int aCWmin, aCWmax;

	if (!local->ops->conf_tx)
		return;

	if (local->hw.queues < IEEE80211_NUM_ACS)
		return;

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

	rcu_read_lock();
	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
	use_11b = (chanctx_conf &&
		   chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
		 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
	rcu_read_unlock();

	is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);

	/* Set defaults according to 802.11-2007 Table 7-37 */
	aCWmax = 1023;
	if (use_11b)
		aCWmin = 31;
	else
		aCWmin = 15;

	/* Confiure old 802.11b/g medium access rules. */
	qparam.cw_max = aCWmax;
	qparam.cw_min = aCWmin;
	qparam.txop = 0;
	qparam.aifs = 2;

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
		/* Update if QoS is enabled. */
		if (enable_qos) {
			switch (ac) {
			case IEEE80211_AC_BK:
				qparam.cw_max = aCWmax;
				qparam.cw_min = aCWmin;
				qparam.txop = 0;
				if (is_ocb)
					qparam.aifs = 9;
				else
					qparam.aifs = 7;
				break;
			/* never happens but let's not leave undefined */
			default:
			case IEEE80211_AC_BE:
				qparam.cw_max = aCWmax;
				qparam.cw_min = aCWmin;
				qparam.txop = 0;
				if (is_ocb)
					qparam.aifs = 6;
				else
					qparam.aifs = 3;
				break;
			case IEEE80211_AC_VI:
				qparam.cw_max = aCWmin;
				qparam.cw_min = (aCWmin + 1) / 2 - 1;
				if (is_ocb)
					qparam.txop = 0;
				else if (use_11b)
					qparam.txop = 6016/32;
				else
					qparam.txop = 3008/32;

				if (is_ocb)
					qparam.aifs = 3;
				else
					qparam.aifs = 2;
				break;
			case IEEE80211_AC_VO:
				qparam.cw_max = (aCWmin + 1) / 2 - 1;
				qparam.cw_min = (aCWmin + 1) / 4 - 1;
				if (is_ocb)
					qparam.txop = 0;
				else if (use_11b)
					qparam.txop = 3264/32;
				else
					qparam.txop = 1504/32;
				qparam.aifs = 2;
				break;
			}
		}

		qparam.uapsd = false;

		sdata->tx_conf[ac] = qparam;
		drv_conf_tx(local, sdata, ac, &qparam);
	}

	if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
	    sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
	    sdata->vif.type != NL80211_IFTYPE_NAN) {
		sdata->vif.bss_conf.qos = enable_qos;
		if (bss_notify)
			ieee80211_bss_info_change_notify(sdata,
							 BSS_CHANGED_QOS);
	}
}

void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
			 u16 transaction, u16 auth_alg, u16 status,
			 const u8 *extra, size_t extra_len, const u8 *da,
			 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
			 u32 tx_flags)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	int err;

	/* 24 + 6 = header + auth_algo + auth_transaction + status_code */
	skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
			    24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
	if (!skb)
		return;

	skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);

	mgmt = skb_put_zero(skb, 24 + 6);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_AUTH);
	memcpy(mgmt->da, da, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, bssid, ETH_ALEN);
	mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
	mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
	mgmt->u.auth.status_code = cpu_to_le16(status);
	if (extra)
		skb_put_data(skb, extra, extra_len);

	if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
		mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
		err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
		WARN_ON(err);
	}

	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
					tx_flags;
	ieee80211_tx_skb(sdata, skb);
}

void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
				    const u8 *bssid, u16 stype, u16 reason,
				    bool send_frame, u8 *frame_buf)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt = (void *)frame_buf;

	/* build frame */
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
	mgmt->duration = 0; /* initialize only */
	mgmt->seq_ctrl = 0; /* initialize only */
	memcpy(mgmt->da, bssid, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, bssid, ETH_ALEN);
	/* u.deauth.reason_code == u.disassoc.reason_code */
	mgmt->u.deauth.reason_code = cpu_to_le16(reason);

	if (send_frame) {
		skb = dev_alloc_skb(local->hw.extra_tx_headroom +
				    IEEE80211_DEAUTH_FRAME_LEN);
		if (!skb)
			return;

		skb_reserve(skb, local->hw.extra_tx_headroom);

		/* copy in frame */
		skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);

		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
		    !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
			IEEE80211_SKB_CB(skb)->flags |=
				IEEE80211_TX_INTFL_DONT_ENCRYPT;

		ieee80211_tx_skb(sdata, skb);
	}
}

static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
					 u8 *buffer, size_t buffer_len,
					 const u8 *ie, size_t ie_len,
					 enum nl80211_band band,
					 u32 rate_mask,
					 struct cfg80211_chan_def *chandef,
					 size_t *offset)
{
	struct ieee80211_supported_band *sband;
	u8 *pos = buffer, *end = buffer + buffer_len;
	size_t noffset;
	int supp_rates_len, i;
	u8 rates[32];
	int num_rates;
	int ext_rates_len;
	int shift;
	u32 rate_flags;
	bool have_80mhz = false;

	*offset = 0;

	sband = local->hw.wiphy->bands[band];
	if (WARN_ON_ONCE(!sband))
		return 0;

	rate_flags = ieee80211_chandef_rate_flags(chandef);
	shift = ieee80211_chandef_get_shift(chandef);

	num_rates = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if ((BIT(i) & rate_mask) == 0)
			continue; /* skip rate */
		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
			continue;

		rates[num_rates++] =
			(u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
					  (1 << shift) * 5);
	}

	supp_rates_len = min_t(int, num_rates, 8);

	if (end - pos < 2 + supp_rates_len)
		goto out_err;
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos++ = supp_rates_len;
	memcpy(pos, rates, supp_rates_len);
	pos += supp_rates_len;

	/* insert "request information" if in custom IEs */
	if (ie && ie_len) {
		static const u8 before_extrates[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_REQUEST,
		};
		noffset = ieee80211_ie_split(ie, ie_len,
					     before_extrates,
					     ARRAY_SIZE(before_extrates),
					     *offset);
		if (end - pos < noffset - *offset)
			goto out_err;
		memcpy(pos, ie + *offset, noffset - *offset);
		pos += noffset - *offset;
		*offset = noffset;
	}

	ext_rates_len = num_rates - supp_rates_len;
	if (ext_rates_len > 0) {
		if (end - pos < 2 + ext_rates_len)
			goto out_err;
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
		*pos++ = ext_rates_len;
		memcpy(pos, rates + supp_rates_len, ext_rates_len);
		pos += ext_rates_len;
	}

	if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
		if (end - pos < 3)
			goto out_err;
		*pos++ = WLAN_EID_DS_PARAMS;
		*pos++ = 1;
		*pos++ = ieee80211_frequency_to_channel(
				chandef->chan->center_freq);
	}

	/* insert custom IEs that go before HT */
	if (ie && ie_len) {
		static const u8 before_ht[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_REQUEST,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_DS_PARAMS,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
		noffset = ieee80211_ie_split(ie, ie_len,
					     before_ht, ARRAY_SIZE(before_ht),
					     *offset);
		if (end - pos < noffset - *offset)
			goto out_err;
		memcpy(pos, ie + *offset, noffset - *offset);
		pos += noffset - *offset;
		*offset = noffset;
	}

	if (sband->ht_cap.ht_supported) {
		if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
			goto out_err;
		pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
						sband->ht_cap.cap);
	}

	/*
	 * If adding more here, adjust code in main.c
	 * that calculates local->scan_ies_len.
	 */

	/* insert custom IEs that go before VHT */
	if (ie && ie_len) {
		static const u8 before_vht[] = {
			WLAN_EID_SSID,
			WLAN_EID_SUPP_RATES,
			WLAN_EID_REQUEST,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_DS_PARAMS,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_HT_CAPABILITY,
			WLAN_EID_BSS_COEX_2040,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_SSID_LIST,
			WLAN_EID_CHANNEL_USAGE,
			WLAN_EID_INTERWORKING,
			/* mesh ID can't happen here */
			/* 60 GHz can't happen here right now */
		};
		noffset = ieee80211_ie_split(ie, ie_len,
					     before_vht, ARRAY_SIZE(before_vht),
					     *offset);
		if (end - pos < noffset - *offset)
			goto out_err;
		memcpy(pos, ie + *offset, noffset - *offset);
		pos += noffset - *offset;
		*offset = noffset;
	}

	/* Check if any channel in this sband supports at least 80 MHz */
	for (i = 0; i < sband->n_channels; i++) {
		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
						IEEE80211_CHAN_NO_80MHZ))
			continue;

		have_80mhz = true;
		break;
	}

	if (sband->vht_cap.vht_supported && have_80mhz) {
		if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
			goto out_err;
		pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
						 sband->vht_cap.cap);
	}

	return pos - buffer;
 out_err:
	WARN_ONCE(1, "not enough space for preq IEs\n");
	return pos - buffer;
}

int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
			     size_t buffer_len,
			     struct ieee80211_scan_ies *ie_desc,
			     const u8 *ie, size_t ie_len,
			     u8 bands_used, u32 *rate_masks,
			     struct cfg80211_chan_def *chandef)
{
	size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
	int i;

	memset(ie_desc, 0, sizeof(*ie_desc));

	for (i = 0; i < NUM_NL80211_BANDS; i++) {
		if (bands_used & BIT(i)) {
			pos += ieee80211_build_preq_ies_band(local,
							     buffer + pos,
							     buffer_len - pos,
							     ie, ie_len, i,
							     rate_masks[i],
							     chandef,
							     &custom_ie_offset);
			ie_desc->ies[i] = buffer + old_pos;
			ie_desc->len[i] = pos - old_pos;
			old_pos = pos;
		}
	}

	/* add any remaining custom IEs */
	if (ie && ie_len) {
		if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
			      "not enough space for preq custom IEs\n"))
			return pos;
		memcpy(buffer + pos, ie + custom_ie_offset,
		       ie_len - custom_ie_offset);
		ie_desc->common_ies = buffer + pos;
		ie_desc->common_ie_len = ie_len - custom_ie_offset;
		pos += ie_len - custom_ie_offset;
	}

	return pos;
};

struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
					  const u8 *src, const u8 *dst,
					  u32 ratemask,
					  struct ieee80211_channel *chan,
					  const u8 *ssid, size_t ssid_len,
					  const u8 *ie, size_t ie_len,
					  bool directed)
{
	struct ieee80211_local *local = sdata->local;
	struct cfg80211_chan_def chandef;
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	int ies_len;
	u32 rate_masks[NUM_NL80211_BANDS] = {};
	struct ieee80211_scan_ies dummy_ie_desc;

	/*
	 * Do not send DS Channel parameter for directed probe requests
	 * in order to maximize the chance that we get a response.  Some
	 * badly-behaved APs don't respond when this parameter is included.
	 */
	chandef.width = sdata->vif.bss_conf.chandef.width;
	if (directed)
		chandef.chan = NULL;
	else
		chandef.chan = chan;

	skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
				     100 + ie_len);
	if (!skb)
		return NULL;

	rate_masks[chan->band] = ratemask;
	ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
					   skb_tailroom(skb), &dummy_ie_desc,
					   ie, ie_len, BIT(chan->band),
					   rate_masks, &chandef);
	skb_put(skb, ies_len);

	if (dst) {
		mgmt = (struct ieee80211_mgmt *) skb->data;
		memcpy(mgmt->da, dst, ETH_ALEN);
		memcpy(mgmt->bssid, dst, ETH_ALEN);
	}

	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;

	return skb;
}

void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
			      const u8 *src, const u8 *dst,
			      const u8 *ssid, size_t ssid_len,
			      const u8 *ie, size_t ie_len,
			      u32 ratemask, bool directed, u32 tx_flags,
			      struct ieee80211_channel *channel, bool scan)
{
	struct sk_buff *skb;

	skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
					ssid, ssid_len,
					ie, ie_len, directed);
	if (skb) {
		IEEE80211_SKB_CB(skb)->flags |= tx_flags;
		if (scan)
			ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
		else
			ieee80211_tx_skb(sdata, skb);
	}
}

u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
			    struct ieee802_11_elems *elems,
			    enum nl80211_band band, u32 *basic_rates)
{
	struct ieee80211_supported_band *sband;
	size_t num_rates;
	u32 supp_rates, rate_flags;
	int i, j, shift;

	sband = sdata->local->hw.wiphy->bands[band];
	if (WARN_ON(!sband))
		return 1;

	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
	shift = ieee80211_vif_get_shift(&sdata->vif);

	num_rates = sband->n_bitrates;
	supp_rates = 0;
	for (i = 0; i < elems->supp_rates_len +
		     elems->ext_supp_rates_len; i++) {
		u8 rate = 0;
		int own_rate;
		bool is_basic;
		if (i < elems->supp_rates_len)
			rate = elems->supp_rates[i];
		else if (elems->ext_supp_rates)
			rate = elems->ext_supp_rates
				[i - elems->supp_rates_len];
		own_rate = 5 * (rate & 0x7f);
		is_basic = !!(rate & 0x80);

		if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
			continue;

		for (j = 0; j < num_rates; j++) {
			int brate;
			if ((rate_flags & sband->bitrates[j].flags)
			    != rate_flags)
				continue;

			brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
					     1 << shift);

			if (brate == own_rate) {
				supp_rates |= BIT(j);
				if (basic_rates && is_basic)
					*basic_rates |= BIT(j);
			}
		}
	}
	return supp_rates;
}

void ieee80211_stop_device(struct ieee80211_local *local)
{
	ieee80211_led_radio(local, false);
	ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);

	cancel_work_sync(&local->reconfig_filter);

	flush_workqueue(local->workqueue);
	drv_stop(local);
}

static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
					   bool aborted)
{
	/* It's possible that we don't handle the scan completion in
	 * time during suspend, so if it's still marked as completed
	 * here, queue the work and flush it to clean things up.
	 * Instead of calling the worker function directly here, we
	 * really queue it to avoid potential races with other flows
	 * scheduling the same work.
	 */
	if (test_bit(SCAN_COMPLETED, &local->scanning)) {
		/* If coming from reconfiguration failure, abort the scan so
		 * we don't attempt to continue a partial HW scan - which is
		 * possible otherwise if (e.g.) the 2.4 GHz portion was the
		 * completed scan, and a 5 GHz portion is still pending.
		 */
		if (aborted)
			set_bit(SCAN_ABORTED, &local->scanning);
		ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
		flush_delayed_work(&local->scan_work);
	}
}

static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_chanctx *ctx;

	/*
	 * We get here if during resume the device can't be restarted properly.
	 * We might also get here if this happens during HW reset, which is a
	 * slightly different situation and we need to drop all connections in
	 * the latter case.
	 *
	 * Ask cfg80211 to turn off all interfaces, this will result in more
	 * warnings but at least we'll then get into a clean stopped state.
	 */

	local->resuming = false;
	local->suspended = false;
	local->in_reconfig = false;

	ieee80211_flush_completed_scan(local, true);

	/* scheduled scan clearly can't be running any more, but tell
	 * cfg80211 and clear local state
	 */
	ieee80211_sched_scan_end(local);

	list_for_each_entry(sdata, &local->interfaces, list)
		sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;

	/* Mark channel contexts as not being in the driver any more to avoid
	 * removing them from the driver during the shutdown process...
	 */
	mutex_lock(&local->chanctx_mtx);
	list_for_each_entry(ctx, &local->chanctx_list, list)
		ctx->driver_present = false;
	mutex_unlock(&local->chanctx_mtx);

	cfg80211_shutdown_all_interfaces(local->hw.wiphy);
}

static void ieee80211_assign_chanctx(struct ieee80211_local *local,
				     struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_chanctx_conf *conf;
	struct ieee80211_chanctx *ctx;

	if (!local->use_chanctx)
		return;

	mutex_lock(&local->chanctx_mtx);
	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					 lockdep_is_held(&local->chanctx_mtx));
	if (conf) {
		ctx = container_of(conf, struct ieee80211_chanctx, conf);
		drv_assign_vif_chanctx(local, sdata, ctx);
	}
	mutex_unlock(&local->chanctx_mtx);
}

static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;

	/* add STAs back */
	mutex_lock(&local->sta_mtx);
	list_for_each_entry(sta, &local->sta_list, list) {
		enum ieee80211_sta_state state;

		if (!sta->uploaded || sta->sdata != sdata)
			continue;

		for (state = IEEE80211_STA_NOTEXIST;
		     state < sta->sta_state; state++)
			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
					      state + 1));
	}
	mutex_unlock(&local->sta_mtx);
}

static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
{
	struct cfg80211_nan_func *func, **funcs;
	int res, id, i = 0;

	res = drv_start_nan(sdata->local, sdata,
			    &sdata->u.nan.conf);
	if (WARN_ON(res))
		return res;

	funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
			sizeof(*funcs), GFP_KERNEL);
	if (!funcs)
		return -ENOMEM;

	/* Add all the functions:
	 * This is a little bit ugly. We need to call a potentially sleeping
	 * callback for each NAN function, so we can't hold the spinlock.
	 */
	spin_lock_bh(&sdata->u.nan.func_lock);

	idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
		funcs[i++] = func;

	spin_unlock_bh(&sdata->u.nan.func_lock);

	for (i = 0; funcs[i]; i++) {
		res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
		if (WARN_ON(res))
			ieee80211_nan_func_terminated(&sdata->vif,
						      funcs[i]->instance_id,
						      NL80211_NAN_FUNC_TERM_REASON_ERROR,
						      GFP_KERNEL);
	}

	kfree(funcs);

	return 0;
}

int ieee80211_reconfig(struct ieee80211_local *local)
{
	struct ieee80211_hw *hw = &local->hw;
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_chanctx *ctx;
	struct sta_info *sta;
	int res, i;
	bool reconfig_due_to_wowlan = false;
	struct ieee80211_sub_if_data *sched_scan_sdata;
	struct cfg80211_sched_scan_request *sched_scan_req;
	bool sched_scan_stopped = false;
	bool suspended = local->suspended;

	/* nothing to do if HW shouldn't run */
	if (!local->open_count)
		goto wake_up;

#ifdef CONFIG_PM
	if (suspended)
		local->resuming = true;

	if (local->wowlan) {
		/*
		 * In the wowlan case, both mac80211 and the device
		 * are functional when the resume op is called, so
		 * clear local->suspended so the device could operate
		 * normally (e.g. pass rx frames).
		 */
		local->suspended = false;
		res = drv_resume(local);
		local->wowlan = false;
		if (res < 0) {
			local->resuming = false;
			return res;
		}
		if (res == 0)
			goto wake_up;
		WARN_ON(res > 1);
		/*
		 * res is 1, which means the driver requested
		 * to go through a regular reset on wakeup.
		 * restore local->suspended in this case.
		 */
		reconfig_due_to_wowlan = true;
		local->suspended = true;
	}
#endif

	/*
	 * In case of hw_restart during suspend (without wowlan),
	 * cancel restart work, as we are reconfiguring the device
	 * anyway.
	 * Note that restart_work is scheduled on a frozen workqueue,
	 * so we can't deadlock in this case.
	 */
	if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
		cancel_work_sync(&local->restart_work);

	local->started = false;

	/*
	 * Upon resume hardware can sometimes be goofy due to
	 * various platform / driver / bus issues, so restarting
	 * the device may at times not work immediately. Propagate
	 * the error.
	 */
	res = drv_start(local);
	if (res) {
		if (suspended)
			WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
		else
			WARN(1, "Hardware became unavailable during restart.\n");
		ieee80211_handle_reconfig_failure(local);
		return res;
	}

	/* setup fragmentation threshold */
	drv_set_frag_threshold(local, hw->wiphy->frag_threshold);

	/* setup RTS threshold */
	drv_set_rts_threshold(local, hw->wiphy->rts_threshold);

	/* reset coverage class */
	drv_set_coverage_class(local, hw->wiphy->coverage_class);

	ieee80211_led_radio(local, true);
	ieee80211_mod_tpt_led_trig(local,
				   IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);

	/* add interfaces */
	sdata = rtnl_dereference(local->monitor_sdata);
	if (sdata) {
		/* in HW restart it exists already */
		WARN_ON(local->resuming);
		res = drv_add_interface(local, sdata);
		if (WARN_ON(res)) {
			RCU_INIT_POINTER(local->monitor_sdata, NULL);
			synchronize_net();
			kfree(sdata);
		}
	}

	list_for_each_entry(sdata, &local->interfaces, list) {
		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
		    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
		    ieee80211_sdata_running(sdata)) {
			res = drv_add_interface(local, sdata);
			if (WARN_ON(res))
				break;
		}
	}

	/* If adding any of the interfaces failed above, roll back and
	 * report failure.
	 */
	if (res) {
		list_for_each_entry_continue_reverse(sdata, &local->interfaces,
						     list)
			if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
			    sdata->vif.type != NL80211_IFTYPE_MONITOR &&
			    ieee80211_sdata_running(sdata))
				drv_remove_interface(local, sdata);
		ieee80211_handle_reconfig_failure(local);
		return res;
	}

	/* add channel contexts */
	if (local->use_chanctx) {
		mutex_lock(&local->chanctx_mtx);
		list_for_each_entry(ctx, &local->chanctx_list, list)
			if (ctx->replace_state !=
			    IEEE80211_CHANCTX_REPLACES_OTHER)
				WARN_ON(drv_add_chanctx(local, ctx));
		mutex_unlock(&local->chanctx_mtx);

		sdata = rtnl_dereference(local->monitor_sdata);
		if (sdata && ieee80211_sdata_running(sdata))
			ieee80211_assign_chanctx(local, sdata);
	}

	/* reconfigure hardware */
	ieee80211_hw_config(local, ~0);

	ieee80211_configure_filter(local);

	/* Finally also reconfigure all the BSS information */
	list_for_each_entry(sdata, &local->interfaces, list) {
		u32 changed;

		if (!ieee80211_sdata_running(sdata))
			continue;

		ieee80211_assign_chanctx(local, sdata);

		switch (sdata->vif.type) {
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_MONITOR:
			break;
		default:
			ieee80211_reconfig_stations(sdata);
			/* fall through */
		case NL80211_IFTYPE_AP: /* AP stations are handled later */
			for (i = 0; i < IEEE80211_NUM_ACS; i++)
				drv_conf_tx(local, sdata, i,
					    &sdata->tx_conf[i]);
			break;
		}

		/* common change flags for all interface types */
		changed = BSS_CHANGED_ERP_CTS_PROT |
			  BSS_CHANGED_ERP_PREAMBLE |
			  BSS_CHANGED_ERP_SLOT |
			  BSS_CHANGED_HT |
			  BSS_CHANGED_BASIC_RATES |
			  BSS_CHANGED_BEACON_INT |
			  BSS_CHANGED_BSSID |
			  BSS_CHANGED_CQM |
			  BSS_CHANGED_QOS |
			  BSS_CHANGED_IDLE |
			  BSS_CHANGED_TXPOWER;

		if (sdata->vif.mu_mimo_owner)
			changed |= BSS_CHANGED_MU_GROUPS;

		switch (sdata->vif.type) {
		case NL80211_IFTYPE_STATION:
			changed |= BSS_CHANGED_ASSOC |
				   BSS_CHANGED_ARP_FILTER |
				   BSS_CHANGED_PS;

			/* Re-send beacon info report to the driver */
			if (sdata->u.mgd.have_beacon)
				changed |= BSS_CHANGED_BEACON_INFO;

			if (sdata->vif.bss_conf.max_idle_period ||
			    sdata->vif.bss_conf.protected_keep_alive)
				changed |= BSS_CHANGED_KEEP_ALIVE;

			sdata_lock(sdata);
			ieee80211_bss_info_change_notify(sdata, changed);
			sdata_unlock(sdata);
			break;
		case NL80211_IFTYPE_OCB:
			changed |= BSS_CHANGED_OCB;
			ieee80211_bss_info_change_notify(sdata, changed);
			break;
		case NL80211_IFTYPE_ADHOC:
			changed |= BSS_CHANGED_IBSS;
			/* fall through */
		case NL80211_IFTYPE_AP:
			changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;

			if (sdata->vif.type == NL80211_IFTYPE_AP) {
				changed |= BSS_CHANGED_AP_PROBE_RESP;

				if (rcu_access_pointer(sdata->u.ap.beacon))
					drv_start_ap(local, sdata);
			}

			/* fall through */
		case NL80211_IFTYPE_MESH_POINT:
			if (sdata->vif.bss_conf.enable_beacon) {
				changed |= BSS_CHANGED_BEACON |
					   BSS_CHANGED_BEACON_ENABLED;
				ieee80211_bss_info_change_notify(sdata, changed);
			}
			break;
		case NL80211_IFTYPE_NAN:
			res = ieee80211_reconfig_nan(sdata);
			if (res < 0) {
				ieee80211_handle_reconfig_failure(local);
				return res;
			}
			break;
		case NL80211_IFTYPE_WDS:
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_P2P_DEVICE:
			/* nothing to do */
			break;
		case NL80211_IFTYPE_UNSPECIFIED:
		case NUM_NL80211_IFTYPES:
		case NL80211_IFTYPE_P2P_CLIENT:
		case NL80211_IFTYPE_P2P_GO:
			WARN_ON(1);
			break;
		}
	}

	ieee80211_recalc_ps(local);

	/*
	 * The sta might be in psm against the ap (e.g. because
	 * this was the state before a hw restart), so we
	 * explicitly send a null packet in order to make sure
	 * it'll sync against the ap (and get out of psm).
	 */
	if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
		list_for_each_entry(sdata, &local->interfaces, list) {
			if (sdata->vif.type != NL80211_IFTYPE_STATION)
				continue;
			if (!sdata->u.mgd.associated)
				continue;

			ieee80211_send_nullfunc(local, sdata, false);
		}
	}

	/* APs are now beaconing, add back stations */
	mutex_lock(&local->sta_mtx);
	list_for_each_entry(sta, &local->sta_list, list) {
		enum ieee80211_sta_state state;

		if (!sta->uploaded)
			continue;

		if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
			continue;

		for (state = IEEE80211_STA_NOTEXIST;
		     state < sta->sta_state; state++)
			WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
					      state + 1));
	}
	mutex_unlock(&local->sta_mtx);

	/* add back keys */
	list_for_each_entry(sdata, &local->interfaces, list)
		ieee80211_reset_crypto_tx_tailroom(sdata);

	list_for_each_entry(sdata, &local->interfaces, list)
		if (ieee80211_sdata_running(sdata))
			ieee80211_enable_keys(sdata);

	/* Reconfigure sched scan if it was interrupted by FW restart */
	mutex_lock(&local->mtx);
	sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
						lockdep_is_held(&local->mtx));
	sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
						lockdep_is_held(&local->mtx));
	if (sched_scan_sdata && sched_scan_req)
		/*
		 * Sched scan stopped, but we don't want to report it. Instead,
		 * we're trying to reschedule. However, if more than one scan
		 * plan was set, we cannot reschedule since we don't know which
		 * scan plan was currently running (and some scan plans may have
		 * already finished).
		 */
		if (sched_scan_req->n_scan_plans > 1 ||
		    __ieee80211_request_sched_scan_start(sched_scan_sdata,
							 sched_scan_req)) {
			RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
			RCU_INIT_POINTER(local->sched_scan_req, NULL);
			sched_scan_stopped = true;
		}
	mutex_unlock(&local->mtx);

	if (sched_scan_stopped)
		cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);

 wake_up:
	if (local->in_reconfig) {
		local->in_reconfig = false;
		barrier();

		/* Restart deferred ROCs */
		mutex_lock(&local->mtx);
		ieee80211_start_next_roc(local);
		mutex_unlock(&local->mtx);
	}

	if (local->monitors == local->open_count && local->monitors > 0)
		ieee80211_add_virtual_monitor(local);

	/*
	 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
	 * sessions can be established after a resume.
	 *
	 * Also tear down aggregation sessions since reconfiguring
	 * them in a hardware restart scenario is not easily done
	 * right now, and the hardware will have lost information
	 * about the sessions, but we and the AP still think they
	 * are active. This is really a workaround though.
	 */
	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
		mutex_lock(&local->sta_mtx);

		list_for_each_entry(sta, &local->sta_list, list) {
			if (!local->resuming)
				ieee80211_sta_tear_down_BA_sessions(
						sta, AGG_STOP_LOCAL_REQUEST);
			clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
		}

		mutex_unlock(&local->sta_mtx);
	}

	ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
					false);

	/*
	 * If this is for hw restart things are still running.
	 * We may want to change that later, however.
	 */
	if (local->open_count && (!suspended || reconfig_due_to_wowlan))
		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);

	if (!suspended)
		return 0;

#ifdef CONFIG_PM
	/* first set suspended false, then resuming */
	local->suspended = false;
	mb();
	local->resuming = false;

	ieee80211_flush_completed_scan(local, false);

	if (local->open_count && !reconfig_due_to_wowlan)
		drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);

	list_for_each_entry(sdata, &local->interfaces, list) {
		if (!ieee80211_sdata_running(sdata))
			continue;
		if (sdata->vif.type == NL80211_IFTYPE_STATION)
			ieee80211_sta_restart(sdata);
	}

	mod_timer(&local->sta_cleanup, jiffies + 1);
#else
	WARN_ON(1);
#endif

	return 0;
}

void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_local *local;
	struct ieee80211_key *key;

	if (WARN_ON(!vif))
		return;

	sdata = vif_to_sdata(vif);
	local = sdata->local;

	if (WARN_ON(!local->resuming))
		return;

	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
		return;

	sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;

	mutex_lock(&local->key_mtx);
	list_for_each_entry(key, &sdata->key_list, list)
		key->flags |= KEY_FLAG_TAINTED;
	mutex_unlock(&local->key_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);

void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_chanctx *chanctx;

	mutex_lock(&local->chanctx_mtx);

	chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					lockdep_is_held(&local->chanctx_mtx));

	/*
	 * This function can be called from a work, thus it may be possible
	 * that the chanctx_conf is removed (due to a disconnection, for
	 * example).
	 * So nothing should be done in such case.
	 */
	if (!chanctx_conf)
		goto unlock;

	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
	ieee80211_recalc_smps_chanctx(local, chanctx);
 unlock:
	mutex_unlock(&local->chanctx_mtx);
}

void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *chanctx_conf;
	struct ieee80211_chanctx *chanctx;

	mutex_lock(&local->chanctx_mtx);

	chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					lockdep_is_held(&local->chanctx_mtx));

	if (WARN_ON_ONCE(!chanctx_conf))
		goto unlock;

	chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
	ieee80211_recalc_chanctx_min_def(local, chanctx);
 unlock:
	mutex_unlock(&local->chanctx_mtx);
}

size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
{
	size_t pos = offset;

	while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
		pos += 2 + ies[pos + 1];

	return pos;
}

static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
					    int rssi_min_thold,
					    int rssi_max_thold)
{
	trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);

	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
		return;

	/*
	 * Scale up threshold values before storing it, as the RSSI averaging
	 * algorithm uses a scaled up value as well. Change this scaling
	 * factor if the RSSI averaging algorithm changes.
	 */
	sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
	sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
}

void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
				    int rssi_min_thold,
				    int rssi_max_thold)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	WARN_ON(rssi_min_thold == rssi_max_thold ||
		rssi_min_thold > rssi_max_thold);

	_ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
				       rssi_max_thold);
}
EXPORT_SYMBOL(ieee80211_enable_rssi_reports);

void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	_ieee80211_enable_rssi_reports(sdata, 0, 0);
}
EXPORT_SYMBOL(ieee80211_disable_rssi_reports);

u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
			      u16 cap)
{
	__le16 tmp;

	*pos++ = WLAN_EID_HT_CAPABILITY;
	*pos++ = sizeof(struct ieee80211_ht_cap);
	memset(pos, 0, sizeof(struct ieee80211_ht_cap));

	/* capability flags */
	tmp = cpu_to_le16(cap);
	memcpy(pos, &tmp, sizeof(u16));
	pos += sizeof(u16);

	/* AMPDU parameters */
	*pos++ = ht_cap->ampdu_factor |
		 (ht_cap->ampdu_density <<
			IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);

	/* MCS set */
	memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
	pos += sizeof(ht_cap->mcs);

	/* extended capabilities */
	pos += sizeof(__le16);

	/* BF capabilities */
	pos += sizeof(__le32);

	/* antenna selection */
	pos += sizeof(u8);

	return pos;
}

u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
			       u32 cap)
{
	__le32 tmp;

	*pos++ = WLAN_EID_VHT_CAPABILITY;
	*pos++ = sizeof(struct ieee80211_vht_cap);
	memset(pos, 0, sizeof(struct ieee80211_vht_cap));

	/* capability flags */
	tmp = cpu_to_le32(cap);
	memcpy(pos, &tmp, sizeof(u32));
	pos += sizeof(u32);

	/* VHT MCS set */
	memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
	pos += sizeof(vht_cap->vht_mcs);

	return pos;
}

u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
			       const struct cfg80211_chan_def *chandef,
			       u16 prot_mode, bool rifs_mode)
{
	struct ieee80211_ht_operation *ht_oper;
	/* Build HT Information */
	*pos++ = WLAN_EID_HT_OPERATION;
	*pos++ = sizeof(struct ieee80211_ht_operation);
	ht_oper = (struct ieee80211_ht_operation *)pos;
	ht_oper->primary_chan = ieee80211_frequency_to_channel(
					chandef->chan->center_freq);
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_160:
	case NL80211_CHAN_WIDTH_80P80:
	case NL80211_CHAN_WIDTH_80:
	case NL80211_CHAN_WIDTH_40:
		if (chandef->center_freq1 > chandef->chan->center_freq)
			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
		else
			ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
		break;
	default:
		ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
		break;
	}
	if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
	    chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
	    chandef->width != NL80211_CHAN_WIDTH_20)
		ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;

	if (rifs_mode)
		ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;

	ht_oper->operation_mode = cpu_to_le16(prot_mode);
	ht_oper->stbc_param = 0x0000;

	/* It seems that Basic MCS set and Supported MCS set
	   are identical for the first 10 bytes */
	memset(&ht_oper->basic_set, 0, 16);
	memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);

	return pos + sizeof(struct ieee80211_ht_operation);
}

void ieee80211_ie_build_wide_bw_cs(u8 *pos,
				   const struct cfg80211_chan_def *chandef)
{
	*pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;	/* EID */
	*pos++ = 3;					/* IE length */
	/* New channel width */
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_80:
		*pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
		break;
	case NL80211_CHAN_WIDTH_160:
		*pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
		break;
	case NL80211_CHAN_WIDTH_80P80:
		*pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
		break;
	default:
		*pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
	}

	/* new center frequency segment 0 */
	*pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
	/* new center frequency segment 1 */
	if (chandef->center_freq2)
		*pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
	else
		*pos++ = 0;
}

u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
				const struct cfg80211_chan_def *chandef)
{
	struct ieee80211_vht_operation *vht_oper;

	*pos++ = WLAN_EID_VHT_OPERATION;
	*pos++ = sizeof(struct ieee80211_vht_operation);
	vht_oper = (struct ieee80211_vht_operation *)pos;
	vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
							chandef->center_freq1);
	if (chandef->center_freq2)
		vht_oper->center_freq_seg1_idx =
			ieee80211_frequency_to_channel(chandef->center_freq2);
	else
		vht_oper->center_freq_seg1_idx = 0x00;

	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_160:
		/*
		 * Convert 160 MHz channel width to new style as interop
		 * workaround.
		 */
		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
		vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
		if (chandef->chan->center_freq < chandef->center_freq1)
			vht_oper->center_freq_seg0_idx -= 8;
		else
			vht_oper->center_freq_seg0_idx += 8;
		break;
	case NL80211_CHAN_WIDTH_80P80:
		/*
		 * Convert 80+80 MHz channel width to new style as interop
		 * workaround.
		 */
		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
		break;
	case NL80211_CHAN_WIDTH_80:
		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
		break;
	default:
		vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
		break;
	}

	/* don't require special VHT peer rates */
	vht_oper->basic_mcs_set = cpu_to_le16(0xffff);

	return pos + sizeof(struct ieee80211_vht_operation);
}

bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
			       struct cfg80211_chan_def *chandef)
{
	enum nl80211_channel_type channel_type;

	if (!ht_oper)
		return false;

	switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
	case IEEE80211_HT_PARAM_CHA_SEC_NONE:
		channel_type = NL80211_CHAN_HT20;
		break;
	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
		channel_type = NL80211_CHAN_HT40PLUS;
		break;
	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
		channel_type = NL80211_CHAN_HT40MINUS;
		break;
	default:
		channel_type = NL80211_CHAN_NO_HT;
		return false;
	}

	cfg80211_chandef_create(chandef, chandef->chan, channel_type);
	return true;
}

bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
				struct cfg80211_chan_def *chandef)
{
	struct cfg80211_chan_def new = *chandef;
	int cf1, cf2;

	if (!oper)
		return false;

	cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
					     chandef->chan->band);
	cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
					     chandef->chan->band);

	switch (oper->chan_width) {
	case IEEE80211_VHT_CHANWIDTH_USE_HT:
		break;
	case IEEE80211_VHT_CHANWIDTH_80MHZ:
		new.width = NL80211_CHAN_WIDTH_80;
		new.center_freq1 = cf1;
		/* If needed, adjust based on the newer interop workaround. */
		if (oper->center_freq_seg1_idx) {
			unsigned int diff;

			diff = abs(oper->center_freq_seg1_idx -
				   oper->center_freq_seg0_idx);
			if (diff == 8) {
				new.width = NL80211_CHAN_WIDTH_160;
				new.center_freq1 = cf2;
			} else if (diff > 8) {
				new.width = NL80211_CHAN_WIDTH_80P80;
				new.center_freq2 = cf2;
			}
		}
		break;
	case IEEE80211_VHT_CHANWIDTH_160MHZ:
		new.width = NL80211_CHAN_WIDTH_160;
		new.center_freq1 = cf1;
		break;
	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
		new.width = NL80211_CHAN_WIDTH_80P80;
		new.center_freq1 = cf1;
		new.center_freq2 = cf2;
		break;
	default:
		return false;
	}

	if (!cfg80211_chandef_valid(&new))
		return false;

	*chandef = new;
	return true;
}

int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
			     const struct ieee80211_supported_band *sband,
			     const u8 *srates, int srates_len, u32 *rates)
{
	u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
	int shift = ieee80211_chandef_get_shift(chandef);
	struct ieee80211_rate *br;
	int brate, rate, i, j, count = 0;

	*rates = 0;

	for (i = 0; i < srates_len; i++) {
		rate = srates[i] & 0x7f;

		for (j = 0; j < sband->n_bitrates; j++) {
			br = &sband->bitrates[j];
			if ((rate_flags & br->flags) != rate_flags)
				continue;

			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
			if (brate == rate) {
				*rates |= BIT(j);
				count++;
				break;
			}
		}
	}
	return count;
}

int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
			    struct sk_buff *skb, bool need_basic,
			    enum nl80211_band band)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_supported_band *sband;
	int rate, shift;
	u8 i, rates, *pos;
	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
	u32 rate_flags;

	shift = ieee80211_vif_get_shift(&sdata->vif);
	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
	sband = local->hw.wiphy->bands[band];
	rates = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
			continue;
		rates++;
	}
	if (rates > 8)
		rates = 8;

	if (skb_tailroom(skb) < rates + 2)
		return -ENOMEM;

	pos = skb_put(skb, rates + 2);
	*pos++ = WLAN_EID_SUPP_RATES;
	*pos++ = rates;
	for (i = 0; i < rates; i++) {
		u8 basic = 0;
		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
			continue;

		if (need_basic && basic_rates & BIT(i))
			basic = 0x80;
		rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
				    5 * (1 << shift));
		*pos++ = basic | (u8) rate;
	}

	return 0;
}

int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
				struct sk_buff *skb, bool need_basic,
				enum nl80211_band band)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_supported_band *sband;
	int rate, shift;
	u8 i, exrates, *pos;
	u32 basic_rates = sdata->vif.bss_conf.basic_rates;
	u32 rate_flags;

	rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
	shift = ieee80211_vif_get_shift(&sdata->vif);

	sband = local->hw.wiphy->bands[band];
	exrates = 0;
	for (i = 0; i < sband->n_bitrates; i++) {
		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
			continue;
		exrates++;
	}

	if (exrates > 8)
		exrates -= 8;
	else
		exrates = 0;

	if (skb_tailroom(skb) < exrates + 2)
		return -ENOMEM;

	if (exrates) {
		pos = skb_put(skb, exrates + 2);
		*pos++ = WLAN_EID_EXT_SUPP_RATES;
		*pos++ = exrates;
		for (i = 8; i < sband->n_bitrates; i++) {
			u8 basic = 0;
			if ((rate_flags & sband->bitrates[i].flags)
			    != rate_flags)
				continue;
			if (need_basic && basic_rates & BIT(i))
				basic = 0x80;
			rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
					    5 * (1 << shift));
			*pos++ = basic | (u8) rate;
		}
	}
	return 0;
}

int ieee80211_ave_rssi(struct ieee80211_vif *vif)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;

	if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
		/* non-managed type inferfaces */
		return 0;
	}
	return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
}
EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);

u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
{
	if (!mcs)
		return 1;

	/* TODO: consider rx_highest */

	if (mcs->rx_mask[3])
		return 4;
	if (mcs->rx_mask[2])
		return 3;
	if (mcs->rx_mask[1])
		return 2;
	return 1;
}

/**
 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
 * @local: mac80211 hw info struct
 * @status: RX status
 * @mpdu_len: total MPDU length (including FCS)
 * @mpdu_offset: offset into MPDU to calculate timestamp at
 *
 * This function calculates the RX timestamp at the given MPDU offset, taking
 * into account what the RX timestamp was. An offset of 0 will just normalize
 * the timestamp to TSF at beginning of MPDU reception.
 */
u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
				     struct ieee80211_rx_status *status,
				     unsigned int mpdu_len,
				     unsigned int mpdu_offset)
{
	u64 ts = status->mactime;
	struct rate_info ri;
	u16 rate;

	if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
		return 0;

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

	/* Fill cfg80211 rate info */
	switch (status->encoding) {
	case RX_ENC_HT:
		ri.mcs = status->rate_idx;
		ri.flags |= RATE_INFO_FLAGS_MCS;
		ri.bw = status->bw;
		if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
		break;
	case RX_ENC_VHT:
		ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
		ri.mcs = status->rate_idx;
		ri.nss = status->nss;
		ri.bw = status->bw;
		if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
			ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
		break;
	default:
		WARN_ON(1);
		/* fall through */
	case RX_ENC_LEGACY: {
		struct ieee80211_supported_band *sband;
		int shift = 0;
		int bitrate;

		ri.bw = status->bw;

		switch (status->bw) {
		case RATE_INFO_BW_10:
			shift = 1;
			break;
		case RATE_INFO_BW_5:
			shift = 2;
			break;
		}

		sband = local->hw.wiphy->bands[status->band];
		bitrate = sband->bitrates[status->rate_idx].bitrate;
		ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));

		if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
			/* TODO: handle HT/VHT preambles */
			if (status->band == NL80211_BAND_5GHZ) {
				ts += 20 << shift;
				mpdu_offset += 2;
			} else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
				ts += 96;
			} else {
				ts += 192;
			}
		}
		break;
		}
	}

	rate = cfg80211_calculate_bitrate(&ri);
	if (WARN_ONCE(!rate,
		      "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
		      (unsigned long long)status->flag, status->rate_idx,
		      status->nss))
		return 0;

	/* rewind from end of MPDU */
	if (status->flag & RX_FLAG_MACTIME_END)
		ts -= mpdu_len * 8 * 10 / rate;

	ts += mpdu_offset * 8 * 10 / rate;

	return ts;
}

void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
{
	struct ieee80211_sub_if_data *sdata;
	struct cfg80211_chan_def chandef;

	/* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
	ASSERT_RTNL();

	mutex_lock(&local->mtx);
	list_for_each_entry(sdata, &local->interfaces, list) {
		/* it might be waiting for the local->mtx, but then
		 * by the time it gets it, sdata->wdev.cac_started
		 * will no longer be true
		 */
		cancel_delayed_work(&sdata->dfs_cac_timer_work);

		if (sdata->wdev.cac_started) {
			chandef = sdata->vif.bss_conf.chandef;
			ieee80211_vif_release_channel(sdata);
			cfg80211_cac_event(sdata->dev,
					   &chandef,
					   NL80211_RADAR_CAC_ABORTED,
					   GFP_KERNEL);
		}
	}
	mutex_unlock(&local->mtx);
}

void ieee80211_dfs_radar_detected_work(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local, radar_detected_work);
	struct cfg80211_chan_def chandef = local->hw.conf.chandef;
	struct ieee80211_chanctx *ctx;
	int num_chanctx = 0;

	mutex_lock(&local->chanctx_mtx);
	list_for_each_entry(ctx, &local->chanctx_list, list) {
		if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
			continue;

		num_chanctx++;
		chandef = ctx->conf.def;
	}
	mutex_unlock(&local->chanctx_mtx);

	rtnl_lock();
	ieee80211_dfs_cac_cancel(local);
	rtnl_unlock();

	if (num_chanctx > 1)
		/* XXX: multi-channel is not supported yet */
		WARN_ON(1);
	else
		cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
}

void ieee80211_radar_detected(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	trace_api_radar_detected(local);

	schedule_work(&local->radar_detected_work);
}
EXPORT_SYMBOL(ieee80211_radar_detected);

u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
{
	u32 ret;
	int tmp;

	switch (c->width) {
	case NL80211_CHAN_WIDTH_20:
		c->width = NL80211_CHAN_WIDTH_20_NOHT;
		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
		break;
	case NL80211_CHAN_WIDTH_40:
		c->width = NL80211_CHAN_WIDTH_20;
		c->center_freq1 = c->chan->center_freq;
		ret = IEEE80211_STA_DISABLE_40MHZ |
		      IEEE80211_STA_DISABLE_VHT;
		break;
	case NL80211_CHAN_WIDTH_80:
		tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
		/* n_P40 */
		tmp /= 2;
		/* freq_P40 */
		c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
		c->width = NL80211_CHAN_WIDTH_40;
		ret = IEEE80211_STA_DISABLE_VHT;
		break;
	case NL80211_CHAN_WIDTH_80P80:
		c->center_freq2 = 0;
		c->width = NL80211_CHAN_WIDTH_80;
		ret = IEEE80211_STA_DISABLE_80P80MHZ |
		      IEEE80211_STA_DISABLE_160MHZ;
		break;
	case NL80211_CHAN_WIDTH_160:
		/* n_P20 */
		tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
		/* n_P80 */
		tmp /= 4;
		c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
		c->width = NL80211_CHAN_WIDTH_80;
		ret = IEEE80211_STA_DISABLE_80P80MHZ |
		      IEEE80211_STA_DISABLE_160MHZ;
		break;
	default:
	case NL80211_CHAN_WIDTH_20_NOHT:
		WARN_ON_ONCE(1);
		c->width = NL80211_CHAN_WIDTH_20_NOHT;
		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
		break;
	case NL80211_CHAN_WIDTH_5:
	case NL80211_CHAN_WIDTH_10:
		WARN_ON_ONCE(1);
		/* keep c->width */
		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
		break;
	}

	WARN_ON_ONCE(!cfg80211_chandef_valid(c));

	return ret;
}

/*
 * Returns true if smps_mode_new is strictly more restrictive than
 * smps_mode_old.
 */
bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
				   enum ieee80211_smps_mode smps_mode_new)
{
	if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
			 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
		return false;

	switch (smps_mode_old) {
	case IEEE80211_SMPS_STATIC:
		return false;
	case IEEE80211_SMPS_DYNAMIC:
		return smps_mode_new == IEEE80211_SMPS_STATIC;
	case IEEE80211_SMPS_OFF:
		return smps_mode_new != IEEE80211_SMPS_OFF;
	default:
		WARN_ON(1);
	}

	return false;
}

int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
			      struct cfg80211_csa_settings *csa_settings)
{
	struct sk_buff *skb;
	struct ieee80211_mgmt *mgmt;
	struct ieee80211_local *local = sdata->local;
	int freq;
	int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
			       sizeof(mgmt->u.action.u.chan_switch);
	u8 *pos;

	if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
	    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
		return -EOPNOTSUPP;

	skb = dev_alloc_skb(local->tx_headroom + hdr_len +
			    5 + /* channel switch announcement element */
			    3 + /* secondary channel offset element */
			    5 + /* wide bandwidth channel switch announcement */
			    8); /* mesh channel switch parameters element */
	if (!skb)
		return -ENOMEM;

	skb_reserve(skb, local->tx_headroom);
	mgmt = skb_put_zero(skb, hdr_len);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);

	eth_broadcast_addr(mgmt->da);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	if (ieee80211_vif_is_mesh(&sdata->vif)) {
		memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
	} else {
		struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
		memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
	}
	mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
	mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
	pos = skb_put(skb, 5);
	*pos++ = WLAN_EID_CHANNEL_SWITCH;			/* EID */
	*pos++ = 3;						/* IE length */
	*pos++ = csa_settings->block_tx ? 1 : 0;		/* CSA mode */
	freq = csa_settings->chandef.chan->center_freq;
	*pos++ = ieee80211_frequency_to_channel(freq);		/* channel */
	*pos++ = csa_settings->count;				/* count */

	if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
		enum nl80211_channel_type ch_type;

		skb_put(skb, 3);
		*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;	/* EID */
		*pos++ = 1;					/* IE length */
		ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
		if (ch_type == NL80211_CHAN_HT40PLUS)
			*pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
		else
			*pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
	}

	if (ieee80211_vif_is_mesh(&sdata->vif)) {
		struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

		skb_put(skb, 8);
		*pos++ = WLAN_EID_CHAN_SWITCH_PARAM;		/* EID */
		*pos++ = 6;					/* IE length */
		*pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;	/* Mesh TTL */
		*pos = 0x00;	/* Mesh Flag: Tx Restrict, Initiator, Reason */
		*pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
		*pos++ |= csa_settings->block_tx ?
			  WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
		put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
		pos += 2;
		put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
		pos += 2;
	}

	if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
	    csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
	    csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
		skb_put(skb, 5);
		ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
	}

	ieee80211_tx_skb(sdata, skb);
	return 0;
}

bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
{
	return !(cs == NULL || cs->cipher == 0 ||
		 cs->hdr_len < cs->pn_len + cs->pn_off ||
		 cs->hdr_len <= cs->key_idx_off ||
		 cs->key_idx_shift > 7 ||
		 cs->key_idx_mask == 0);
}

bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
{
	int i;

	/* Ensure we have enough iftype bitmap space for all iftype values */
	WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));

	for (i = 0; i < n; i++)
		if (!ieee80211_cs_valid(&cs[i]))
			return false;

	return true;
}

const struct ieee80211_cipher_scheme *
ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
		 enum nl80211_iftype iftype)
{
	const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
	int n = local->hw.n_cipher_schemes;
	int i;
	const struct ieee80211_cipher_scheme *cs = NULL;

	for (i = 0; i < n; i++) {
		if (l[i].cipher == cipher) {
			cs = &l[i];
			break;
		}
	}

	if (!cs || !(cs->iftype & BIT(iftype)))
		return NULL;

	return cs;
}

int ieee80211_cs_headroom(struct ieee80211_local *local,
			  struct cfg80211_crypto_settings *crypto,
			  enum nl80211_iftype iftype)
{
	const struct ieee80211_cipher_scheme *cs;
	int headroom = IEEE80211_ENCRYPT_HEADROOM;
	int i;

	for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
		cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
				      iftype);

		if (cs && headroom < cs->hdr_len)
			headroom = cs->hdr_len;
	}

	cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
	if (cs && headroom < cs->hdr_len)
		headroom = cs->hdr_len;

	return headroom;
}

static bool
ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
{
	s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
	int skip;

	if (end > 0)
		return false;

	/* One shot NOA  */
	if (data->count[i] == 1)
		return false;

	if (data->desc[i].interval == 0)
		return false;

	/* End time is in the past, check for repetitions */
	skip = DIV_ROUND_UP(-end, data->desc[i].interval);
	if (data->count[i] < 255) {
		if (data->count[i] <= skip) {
			data->count[i] = 0;
			return false;
		}

		data->count[i] -= skip;
	}

	data->desc[i].start += skip * data->desc[i].interval;

	return true;
}

static bool
ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
			     s32 *offset)
{
	bool ret = false;
	int i;

	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
		s32 cur;

		if (!data->count[i])
			continue;

		if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
			ret = true;

		cur = data->desc[i].start - tsf;
		if (cur > *offset)
			continue;

		cur = data->desc[i].start + data->desc[i].duration - tsf;
		if (cur > *offset)
			*offset = cur;
	}

	return ret;
}

static u32
ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
{
	s32 offset = 0;
	int tries = 0;
	/*
	 * arbitrary limit, used to avoid infinite loops when combined NoA
	 * descriptors cover the full time period.
	 */
	int max_tries = 5;

	ieee80211_extend_absent_time(data, tsf, &offset);
	do {
		if (!ieee80211_extend_absent_time(data, tsf, &offset))
			break;

		tries++;
	} while (tries < max_tries);

	return offset;
}

void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
{
	u32 next_offset = BIT(31) - 1;
	int i;

	data->absent = 0;
	data->has_next_tsf = false;
	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
		s32 start;

		if (!data->count[i])
			continue;

		ieee80211_extend_noa_desc(data, tsf, i);
		start = data->desc[i].start - tsf;
		if (start <= 0)
			data->absent |= BIT(i);

		if (next_offset > start)
			next_offset = start;

		data->has_next_tsf = true;
	}

	if (data->absent)
		next_offset = ieee80211_get_noa_absent_time(data, tsf);

	data->next_tsf = tsf + next_offset;
}
EXPORT_SYMBOL(ieee80211_update_p2p_noa);

int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
			    struct ieee80211_noa_data *data, u32 tsf)
{
	int ret = 0;
	int i;

	memset(data, 0, sizeof(*data));

	for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
		const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];

		if (!desc->count || !desc->duration)
			continue;

		data->count[i] = desc->count;
		data->desc[i].start = le32_to_cpu(desc->start_time);
		data->desc[i].duration = le32_to_cpu(desc->duration);
		data->desc[i].interval = le32_to_cpu(desc->interval);

		if (data->count[i] > 1 &&
		    data->desc[i].interval < data->desc[i].duration)
			continue;

		ieee80211_extend_noa_desc(data, tsf, i);
		ret++;
	}

	if (ret)
		ieee80211_update_p2p_noa(data, tsf);

	return ret;
}
EXPORT_SYMBOL(ieee80211_parse_p2p_noa);

void ieee80211_recalc_dtim(struct ieee80211_local *local,
			   struct ieee80211_sub_if_data *sdata)
{
	u64 tsf = drv_get_tsf(local, sdata);
	u64 dtim_count = 0;
	u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
	u8 dtim_period = sdata->vif.bss_conf.dtim_period;
	struct ps_data *ps;
	u8 bcns_from_dtim;

	if (tsf == -1ULL || !beacon_int || !dtim_period)
		return;

	if (sdata->vif.type == NL80211_IFTYPE_AP ||
	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
		if (!sdata->bss)
			return;

		ps = &sdata->bss->ps;
	} else if (ieee80211_vif_is_mesh(&sdata->vif)) {
		ps = &sdata->u.mesh.ps;
	} else {
		return;
	}

	/*
	 * actually finds last dtim_count, mac80211 will update in
	 * __beacon_add_tim().
	 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
	 */
	do_div(tsf, beacon_int);
	bcns_from_dtim = do_div(tsf, dtim_period);
	/* just had a DTIM */
	if (!bcns_from_dtim)
		dtim_count = 0;
	else
		dtim_count = dtim_period - bcns_from_dtim;

	ps->dtim_count = dtim_count;
}

static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
					 struct ieee80211_chanctx *ctx)
{
	struct ieee80211_sub_if_data *sdata;
	u8 radar_detect = 0;

	lockdep_assert_held(&local->chanctx_mtx);

	if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
		return 0;

	list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
		if (sdata->reserved_radar_required)
			radar_detect |= BIT(sdata->reserved_chandef.width);

	/*
	 * An in-place reservation context should not have any assigned vifs
	 * until it replaces the other context.
	 */
	WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
		!list_empty(&ctx->assigned_vifs));

	list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
		if (sdata->radar_required)
			radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);

	return radar_detect;
}

int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
				 const struct cfg80211_chan_def *chandef,
				 enum ieee80211_chanctx_mode chanmode,
				 u8 radar_detect)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_sub_if_data *sdata_iter;
	enum nl80211_iftype iftype = sdata->wdev.iftype;
	struct ieee80211_chanctx *ctx;
	int total = 1;
	struct iface_combination_params params = {
		.radar_detect = radar_detect,
	};

	lockdep_assert_held(&local->chanctx_mtx);

	if (WARN_ON(hweight32(radar_detect) > 1))
		return -EINVAL;

	if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
		    !chandef->chan))
		return -EINVAL;

	if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
		return -EINVAL;

	if (sdata->vif.type == NL80211_IFTYPE_AP ||
	    sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
		/*
		 * always passing this is harmless, since it'll be the
		 * same value that cfg80211 finds if it finds the same
		 * interface ... and that's always allowed
		 */
		params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
	}

	/* Always allow software iftypes */
	if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
		if (radar_detect)
			return -EINVAL;
		return 0;
	}

	if (chandef)
		params.num_different_channels = 1;

	if (iftype != NL80211_IFTYPE_UNSPECIFIED)
		params.iftype_num[iftype] = 1;

	list_for_each_entry(ctx, &local->chanctx_list, list) {
		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
			continue;
		params.radar_detect |=
			ieee80211_chanctx_radar_detect(local, ctx);
		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
			params.num_different_channels++;
			continue;
		}
		if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
		    cfg80211_chandef_compatible(chandef,
						&ctx->conf.def))
			continue;
		params.num_different_channels++;
	}

	list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
		struct wireless_dev *wdev_iter;

		wdev_iter = &sdata_iter->wdev;

		if (sdata_iter == sdata ||
		    !ieee80211_sdata_running(sdata_iter) ||
		    local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
			continue;

		params.iftype_num[wdev_iter->iftype]++;
		total++;
	}

	if (total == 1 && !params.radar_detect)
		return 0;

	return cfg80211_check_combinations(local->hw.wiphy, &params);
}

static void
ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
			 void *data)
{
	u32 *max_num_different_channels = data;

	*max_num_different_channels = max(*max_num_different_channels,
					  c->num_different_channels);
}

int ieee80211_max_num_channels(struct ieee80211_local *local)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_chanctx *ctx;
	u32 max_num_different_channels = 1;
	int err;
	struct iface_combination_params params = {0};

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(ctx, &local->chanctx_list, list) {
		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
			continue;

		params.num_different_channels++;

		params.radar_detect |=
			ieee80211_chanctx_radar_detect(local, ctx);
	}

	list_for_each_entry_rcu(sdata, &local->interfaces, list)
		params.iftype_num[sdata->wdev.iftype]++;

	err = cfg80211_iter_combinations(local->hw.wiphy, &params,
					 ieee80211_iter_max_chans,
					 &max_num_different_channels);
	if (err < 0)
		return err;

	return max_num_different_channels;
}

u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
{
	*buf++ = WLAN_EID_VENDOR_SPECIFIC;
	*buf++ = 7; /* len */
	*buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
	*buf++ = 0x50;
	*buf++ = 0xf2;
	*buf++ = 2; /* WME */
	*buf++ = 0; /* WME info */
	*buf++ = 1; /* WME ver */
	*buf++ = qosinfo; /* U-APSD no in use */

	return buf;
}

void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
			     unsigned long *frame_cnt,
			     unsigned long *byte_cnt)
{
	struct txq_info *txqi = to_txq_info(txq);
	u32 frag_cnt = 0, frag_bytes = 0;
	struct sk_buff *skb;

	skb_queue_walk(&txqi->frags, skb) {
		frag_cnt++;
		frag_bytes += skb->len;
	}

	if (frame_cnt)
		*frame_cnt = txqi->tin.backlog_packets + frag_cnt;

	if (byte_cnt)
		*byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
}
EXPORT_SYMBOL(ieee80211_txq_get_depth);

const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
	IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
	IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
	IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
	IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
};