summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
blob: 498c315291cfac599bd23df37fad6c3e28541201 (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
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 * Copyright(c) 2018 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 * Copyright(c) 2018 Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <net/mac80211.h>

#include "mvm.h"
#include "sta.h"
#include "rs.h"

static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm);

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				u32 sta_id,
				struct ieee80211_key_conf *key, bool mcast,
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset, bool mfp);

/*
 * New version of ADD_STA_sta command added new fields at the end of the
 * structure, so sending the size of the relevant API's structure is enough to
 * support both API versions.
 */
static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
{
	if (iwl_mvm_has_new_rx_api(mvm) ||
	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
		return sizeof(struct iwl_mvm_add_sta_cmd);
	else
		return sizeof(struct iwl_mvm_add_sta_cmd_v7);
}

static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
				    enum nl80211_iftype iftype)
{
	int sta_id;
	u32 reserved_ids = 0;

	BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));

	lockdep_assert_held(&mvm->mutex);

	/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
	if (iftype != NL80211_IFTYPE_STATION)
		reserved_ids = BIT(0);

	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
	for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
		if (BIT(sta_id) & reserved_ids)
			continue;

		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					       lockdep_is_held(&mvm->mutex)))
			return sta_id;
	}
	return IWL_MVM_INVALID_STA;
}

/* send station add/update command to firmware */
int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			   bool update, unsigned int flags)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_add_sta_cmd add_sta_cmd = {
		.sta_id = mvm_sta->sta_id,
		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
		.add_modify = update ? 1 : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
						 STA_FLG_MIMO_EN_MSK |
						 STA_FLG_RTS_MIMO_PROT),
		.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
	};
	int ret;
	u32 status;
	u32 agg_size = 0, mpdu_dens = 0;

	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
		add_sta_cmd.station_type = mvm_sta->sta_type;

	if (!update || (flags & STA_MODIFY_QUEUES)) {
		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);

		if (!iwl_mvm_has_new_tx_api(mvm)) {
			add_sta_cmd.tfd_queue_msk =
				cpu_to_le32(mvm_sta->tfd_queue_msk);

			if (flags & STA_MODIFY_QUEUES)
				add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
		} else {
			WARN_ON(flags & STA_MODIFY_QUEUES);
		}
	}

	switch (sta->bandwidth) {
	case IEEE80211_STA_RX_BW_160:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_80:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_40:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
		/* fall through */
	case IEEE80211_STA_RX_BW_20:
		if (sta->ht_cap.ht_supported)
			add_sta_cmd.station_flags |=
				cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
		break;
	}

	switch (sta->rx_nss) {
	case 1:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case 2:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
		break;
	case 3 ... 8:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
		break;
	}

	switch (sta->smps_mode) {
	case IEEE80211_SMPS_AUTOMATIC:
	case IEEE80211_SMPS_NUM_MODES:
		WARN_ON(1);
		break;
	case IEEE80211_SMPS_STATIC:
		/* override NSS */
		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
		break;
	case IEEE80211_SMPS_DYNAMIC:
		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
		break;
	case IEEE80211_SMPS_OFF:
		/* nothing */
		break;
	}

	if (sta->ht_cap.ht_supported) {
		add_sta_cmd.station_flags_msk |=
			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
				    STA_FLG_AGG_MPDU_DENS_MSK);

		mpdu_dens = sta->ht_cap.ampdu_density;
	}

	if (sta->vht_cap.vht_supported) {
		agg_size = sta->vht_cap.cap &
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
		agg_size >>=
			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
	} else if (sta->ht_cap.ht_supported) {
		agg_size = sta->ht_cap.ampdu_factor;
	}

	add_sta_cmd.station_flags |=
		cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
	add_sta_cmd.station_flags |=
		cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
	if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
		add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);

	if (sta->wme) {
		add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;

		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
			add_sta_cmd.uapsd_acs |= BIT(AC_BK);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
			add_sta_cmd.uapsd_acs |= BIT(AC_BE);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
			add_sta_cmd.uapsd_acs |= BIT(AC_VI);
		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
			add_sta_cmd.uapsd_acs |= BIT(AC_VO);
		add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
		add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
	}

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &add_sta_cmd, &status);
	if (ret)
		return ret;

	switch (status & IWL_ADD_STA_STATUS_MASK) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "ADD_STA failed\n");
		break;
	}

	return ret;
}

static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
{
	struct iwl_mvm_baid_data *data =
		from_timer(data, t, session_timer);
	struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
	struct iwl_mvm_baid_data *ba_data;
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	unsigned long timeout;

	rcu_read_lock();

	ba_data = rcu_dereference(*rcu_ptr);

	if (WARN_ON(!ba_data))
		goto unlock;

	if (!ba_data->timeout)
		goto unlock;

	timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
	if (time_is_after_jiffies(timeout)) {
		mod_timer(&ba_data->session_timer, timeout);
		goto unlock;
	}

	/* Timer expired */
	sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);

	/*
	 * sta should be valid unless the following happens:
	 * The firmware asserts which triggers a reconfig flow, but
	 * the reconfig fails before we set the pointer to sta into
	 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
	 * A-MDPU and hence the timer continues to run. Then, the
	 * timer expires and sta is NULL.
	 */
	if (!sta)
		goto unlock;

	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	ieee80211_rx_ba_timer_expired(mvm_sta->vif,
				      sta->addr, ba_data->tid);
unlock:
	rcu_read_unlock();
}

/* Disable aggregations for a bitmap of TIDs for a given station */
static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
					unsigned long disable_agg_tids,
					bool remove_queue)
{
	struct iwl_mvm_add_sta_cmd cmd = {};
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	u32 status;
	u8 sta_id;

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	sta_id = mvm->queue_info[queue].ra_sta_id;

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return -EINVAL;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	mvmsta->tid_disable_agg |= disable_agg_tids;

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.modify_mask = STA_MODIFY_QUEUES;
	if (disable_agg_tids)
		cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
	if (remove_queue)
		cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
	cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

	rcu_read_unlock();

	/* Notify FW of queue removal from the STA queues */
	status = ADD_STA_SUCCESS;
	return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					   iwl_mvm_add_sta_cmd_size(mvm),
					   &cmd, &status);
}

static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			       int queue, u8 tid, u8 flags)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_DISABLE_QUEUE,
	};
	int ret;

	if (iwl_mvm_has_new_tx_api(mvm)) {
		iwl_trans_txq_free(mvm->trans, queue);

		return 0;
	}

	if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
		return 0;

	mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);

	cmd.action = mvm->queue_info[queue].tid_bitmap ?
		SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
	if (cmd.action == SCD_CFG_DISABLE_QUEUE)
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Disabling TXQ #%d tids=0x%x\n",
			    queue,
			    mvm->queue_info[queue].tid_bitmap);

	/* If the queue is still enabled - nothing left to do in this func */
	if (cmd.action == SCD_CFG_ENABLE_QUEUE)
		return 0;

	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
	cmd.tid = mvm->queue_info[queue].txq_tid;

	/* Make sure queue info is correct even though we overwrite it */
	WARN(mvm->queue_info[queue].tid_bitmap,
	     "TXQ #%d info out-of-sync - tids=0x%x\n",
	     queue, mvm->queue_info[queue].tid_bitmap);

	/* If we are here - the queue is freed and we can zero out these vals */
	mvm->queue_info[queue].tid_bitmap = 0;

	if (sta) {
		struct iwl_mvm_txq *mvmtxq =
			iwl_mvm_txq_from_tid(sta, tid);

		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
	}

	/* Regardless if this is a reserved TXQ for a STA - mark it as false */
	mvm->queue_info[queue].reserved = false;

	iwl_trans_txq_disable(mvm->trans, queue, false);
	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
				   sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);

	if (ret)
		IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
			queue, ret);
	return ret;
}

static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long agg_tids = 0;
	u8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
		return -EINVAL;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			agg_tids |= BIT(tid);
	}
	spin_unlock_bh(&mvmsta->lock);

	return agg_tids;
}

/*
 * Remove a queue from a station's resources.
 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
 * doesn't disable the queue
 */
static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	unsigned long tid_bitmap;
	unsigned long disable_agg_tids = 0;
	u8 sta_id;
	int tid;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return 0;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvmsta->lock);
	/* Unmap MAC queues and TIDs from this queue */
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		struct iwl_mvm_txq *mvmtxq =
			iwl_mvm_txq_from_tid(sta, tid);

		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
			disable_agg_tids |= BIT(tid);
		mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;

		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
	}

	mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
	spin_unlock_bh(&mvmsta->lock);

	rcu_read_unlock();

	/*
	 * The TX path may have been using this TXQ_ID from the tid_data,
	 * so make sure it's no longer running so that we can safely reuse
	 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
	 * above, but nothing guarantees we've stopped using them. Thus,
	 * without this, we could get to iwl_mvm_disable_txq() and remove
	 * the queue while still sending frames to it.
	 */
	synchronize_net();

	return disable_agg_tids;
}

static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
				       struct ieee80211_sta *old_sta,
				       u8 new_sta_id)
{
	struct iwl_mvm_sta *mvmsta;
	u8 sta_id, tid;
	unsigned long disable_agg_tids = 0;
	bool same_sta;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid = mvm->queue_info[queue].txq_tid;

	same_sta = sta_id == new_sta_id;

	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
	if (WARN_ON(!mvmsta))
		return -EINVAL;

	disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
	/* Disable the queue */
	if (disable_agg_tids)
		iwl_mvm_invalidate_sta_queue(mvm, queue,
					     disable_agg_tids, false);

	ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0);
	if (ret) {
		IWL_ERR(mvm,
			"Failed to free inactive queue %d (ret=%d)\n",
			queue, ret);

		return ret;
	}

	/* If TXQ is allocated to another STA, update removal in FW */
	if (!same_sta)
		iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);

	return 0;
}

static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
				    unsigned long tfd_queue_mask, u8 ac)
{
	int queue = 0;
	u8 ac_to_queue[IEEE80211_NUM_ACS];
	int i;

	/*
	 * This protects us against grabbing a queue that's being reconfigured
	 * by the inactivity checker.
	 */
	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));

	/* See what ACs the existing queues for this STA have */
	for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
		/* Only DATA queues can be shared */
		if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
		    i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
			continue;

		ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
	}

	/*
	 * The queue to share is chosen only from DATA queues as follows (in
	 * descending priority):
	 * 1. An AC_BE queue
	 * 2. Same AC queue
	 * 3. Highest AC queue that is lower than new AC
	 * 4. Any existing AC (there always is at least 1 DATA queue)
	 */

	/* Priority 1: An AC_BE queue */
	if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BE];
	/* Priority 2: Same AC queue */
	else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[ac];
	/* Priority 3a: If new AC is VO and VI exists - use VI */
	else if (ac == IEEE80211_AC_VO &&
		 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 3b: No BE so only AC less than the new one is BK */
	else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_BK];
	/* Priority 4a: No BE nor BK - use VI if exists */
	else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VI];
	/* Priority 4b: No BE, BK nor VI - use VO if exists */
	else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
		queue = ac_to_queue[IEEE80211_AC_VO];

	/* Make sure queue found (or not) is legal */
	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
		IWL_ERR(mvm, "No DATA queues available to share\n");
		return -ENOSPC;
	}

	return queue;
}

/*
 * If a given queue has a higher AC than the TID stream that is being compared
 * to, the queue needs to be redirected to the lower AC. This function does that
 * in such a case, otherwise - if no redirection required - it does nothing,
 * unless the %force param is true.
 */
static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
				  int ac, int ssn, unsigned int wdg_timeout,
				  bool force, struct iwl_mvm_txq *txq)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_DISABLE_QUEUE,
	};
	bool shared_queue;
	int ret;

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -EINVAL;

	/*
	 * If the AC is lower than current one - FIFO needs to be redirected to
	 * the lowest one of the streams in the queue. Check if this is needed
	 * here.
	 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
	 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
	 * we need to check if the numerical value of X is LARGER than of Y.
	 */
	if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
		IWL_DEBUG_TX_QUEUES(mvm,
				    "No redirection needed on TXQ #%d\n",
				    queue);
		return 0;
	}

	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
	cmd.tid = mvm->queue_info[queue].txq_tid;
	shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;

	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
			    queue, iwl_mvm_ac_to_tx_fifo[ac]);

	/* Stop the queue and wait for it to empty */
	txq->stopped = true;

	ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
	if (ret) {
		IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
			queue);
		ret = -EIO;
		goto out;
	}

	/* Before redirecting the queue we need to de-activate it */
	iwl_trans_txq_disable(mvm->trans, queue, false);
	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
			ret);

	/* Make sure the SCD wrptr is correctly set before reconfiguring */
	iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);

	/* Update the TID "owner" of the queue */
	mvm->queue_info[queue].txq_tid = tid;

	/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */

	/* Redirect to lower AC */
	iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
			     cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);

	/* Update AC marking of the queue */
	mvm->queue_info[queue].mac80211_ac = ac;

	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

out:
	/* Continue using the queue */
	txq->stopped = false;

	return ret;
}

static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
				   u8 minq, u8 maxq)
{
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* This should not be hit with new TX path */
	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return -ENOSPC;

	/* Start by looking for a free queue */
	for (i = minq; i <= maxq; i++)
		if (mvm->queue_info[i].tid_bitmap == 0 &&
		    mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
			return i;

	return -ENOSPC;
}

static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
				   u8 sta_id, u8 tid, unsigned int timeout)
{
	int queue, size = IWL_DEFAULT_QUEUE_SIZE;

	if (tid == IWL_MAX_TID_COUNT) {
		tid = IWL_MGMT_TID;
		size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
			     mvm->trans->cfg->min_txq_size);
	}
	queue = iwl_trans_txq_alloc(mvm->trans,
				    cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE),
				    sta_id, tid, SCD_QUEUE_CFG, size, timeout);

	if (queue < 0) {
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Failed allocating TXQ for sta %d tid %d, ret: %d\n",
				    sta_id, tid, queue);
		return queue;
	}

	IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
			    queue, sta_id, tid);

	IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue);

	return queue;
}

static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
					struct ieee80211_sta *sta, u8 ac,
					int tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_txq *mvmtxq =
		iwl_mvm_txq_from_tid(sta, tid);
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
	int queue = -1;

	lockdep_assert_held(&mvm->mutex);

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Allocating queue for sta %d on tid %d\n",
			    mvmsta->sta_id, tid);
	queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
	if (queue < 0)
		return queue;

	mvmtxq->txq_id = queue;
	mvm->tvqm_info[queue].txq_tid = tid;
	mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;

	IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);

	spin_lock_bh(&mvmsta->lock);
	mvmsta->tid_data[tid].txq_id = queue;
	spin_unlock_bh(&mvmsta->lock);

	return 0;
}

static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
				       int queue, u8 sta_id, u8 tid)
{
	bool enable_queue = true;

	/* Make sure this TID isn't already enabled */
	if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
		IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
			queue, tid);
		return false;
	}

	/* Update mappings and refcounts */
	if (mvm->queue_info[queue].tid_bitmap)
		enable_queue = false;

	mvm->queue_info[queue].tid_bitmap |= BIT(tid);
	mvm->queue_info[queue].ra_sta_id = sta_id;

	if (enable_queue) {
		if (tid != IWL_MAX_TID_COUNT)
			mvm->queue_info[queue].mac80211_ac =
				tid_to_mac80211_ac[tid];
		else
			mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;

		mvm->queue_info[queue].txq_tid = tid;
	}

	if (sta) {
		struct iwl_mvm_txq *mvmtxq =
			iwl_mvm_txq_from_tid(sta, tid);

		mvmtxq->txq_id = queue;
	}

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Enabling TXQ #%d tids=0x%x\n",
			    queue, mvm->queue_info[queue].tid_bitmap);

	return enable_queue;
}

static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			       int queue, u16 ssn,
			       const struct iwl_trans_txq_scd_cfg *cfg,
			       unsigned int wdg_timeout)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_ENABLE_QUEUE,
		.window = cfg->frame_limit,
		.sta_id = cfg->sta_id,
		.ssn = cpu_to_le16(ssn),
		.tx_fifo = cfg->fifo,
		.aggregate = cfg->aggregate,
		.tid = cfg->tid,
	};
	bool inc_ssn;

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return false;

	/* Send the enabling command if we need to */
	if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
		return false;

	inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
					   NULL, wdg_timeout);
	if (inc_ssn)
		le16_add_cpu(&cmd.ssn, 1);

	WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
	     "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);

	return inc_ssn;
}

static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
{
	struct iwl_scd_txq_cfg_cmd cmd = {
		.scd_queue = queue,
		.action = SCD_CFG_UPDATE_QUEUE_TID,
	};
	int tid;
	unsigned long tid_bitmap;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return;

	tid_bitmap = mvm->queue_info[queue].tid_bitmap;

	if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
		return;

	/* Find any TID for queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	cmd.tid = tid;
	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];

	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
	if (ret) {
		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
			queue, ret);
		return;
	}

	mvm->queue_info[queue].txq_tid = tid;
	IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
			    queue, tid);
}

static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	u8 sta_id;
	int tid = -1;
	unsigned long tid_bitmap;
	unsigned int wdg_timeout;
	int ssn;
	int ret = true;

	/* queue sharing is disabled on new TX path */
	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return;

	lockdep_assert_held(&mvm->mutex);

	sta_id = mvm->queue_info[queue].ra_sta_id;
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;

	/* Find TID for queue, and make sure it is the only one on the queue */
	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
	if (tid_bitmap != BIT(tid)) {
		IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
			queue, tid_bitmap);
		return;
	}

	IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
			    tid);

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
		return;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);

	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);

	ret = iwl_mvm_redirect_queue(mvm, queue, tid,
				     tid_to_mac80211_ac[tid], ssn,
				     wdg_timeout, true,
				     iwl_mvm_txq_from_tid(sta, tid));
	if (ret) {
		IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
		return;
	}

	/* If aggs should be turned back on - do it */
	if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
		struct iwl_mvm_add_sta_cmd cmd = {0};

		mvmsta->tid_disable_agg &= ~BIT(tid);

		cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
		cmd.sta_id = mvmsta->sta_id;
		cmd.add_modify = STA_MODE_MODIFY;
		cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
		cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
		cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);

		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
					   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
		if (!ret) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "TXQ #%d is now aggregated again\n",
					    queue);

			/* Mark queue intenally as aggregating again */
			iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
		}
	}

	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
}

/*
 * Remove inactive TIDs of a given queue.
 * If all queue TIDs are inactive - mark the queue as inactive
 * If only some the queue TIDs are inactive - unmap them from the queue
 *
 * Returns %true if all TIDs were removed and the queue could be reused.
 */
static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
					 struct iwl_mvm_sta *mvmsta, int queue,
					 unsigned long tid_bitmap,
					 unsigned long *unshare_queues,
					 unsigned long *changetid_queues)
{
	int tid;

	lockdep_assert_held(&mvmsta->lock);
	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return false;

	/* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		/* If some TFDs are still queued - don't mark TID as inactive */
		if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
			tid_bitmap &= ~BIT(tid);

		/* Don't mark as inactive any TID that has an active BA */
		if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
			tid_bitmap &= ~BIT(tid);
	}

	/* If all TIDs in the queue are inactive - return it can be reused */
	if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
		IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
		return true;
	}

	/*
	 * If we are here, this is a shared queue and not all TIDs timed-out.
	 * Remove the ones that did.
	 */
	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		u16 tid_bitmap;

		mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
		mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);

		tid_bitmap = mvm->queue_info[queue].tid_bitmap;

		/*
		 * We need to take into account a situation in which a TXQ was
		 * allocated to TID x, and then turned shared by adding TIDs y
		 * and z. If TID x becomes inactive and is removed from the TXQ,
		 * ownership must be given to one of the remaining TIDs.
		 * This is mainly because if TID x continues - a new queue can't
		 * be allocated for it as long as it is an owner of another TXQ.
		 *
		 * Mark this queue in the right bitmap, we'll send the command
		 * to the firmware later.
		 */
		if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
			set_bit(queue, changetid_queues);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "Removing inactive TID %d from shared Q:%d\n",
				    tid, queue);
	}

	IWL_DEBUG_TX_QUEUES(mvm,
			    "TXQ #%d left with tid bitmap 0x%x\n", queue,
			    mvm->queue_info[queue].tid_bitmap);

	/*
	 * There may be different TIDs with the same mac queues, so make
	 * sure all TIDs have existing corresponding mac queues enabled
	 */
	tid_bitmap = mvm->queue_info[queue].tid_bitmap;

	/* If the queue is marked as shared - "unshare" it */
	if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
	    mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
		IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
				    queue);
		set_bit(queue, unshare_queues);
	}

	return false;
}

/*
 * Check for inactivity - this includes checking if any queue
 * can be unshared and finding one (and only one) that can be
 * reused.
 * This function is also invoked as a sort of clean-up task,
 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
 *
 * Returns the queue number, or -ENOSPC.
 */
static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
{
	unsigned long now = jiffies;
	unsigned long unshare_queues = 0;
	unsigned long changetid_queues = 0;
	int i, ret, free_queue = -ENOSPC;
	struct ieee80211_sta *queue_owner  = NULL;

	lockdep_assert_held(&mvm->mutex);

	if (iwl_mvm_has_new_tx_api(mvm))
		return -ENOSPC;

	rcu_read_lock();

	/* we skip the CMD queue below by starting at 1 */
	BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);

	for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
		struct ieee80211_sta *sta;
		struct iwl_mvm_sta *mvmsta;
		u8 sta_id;
		int tid;
		unsigned long inactive_tid_bitmap = 0;
		unsigned long queue_tid_bitmap;

		queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
		if (!queue_tid_bitmap)
			continue;

		/* If TXQ isn't in active use anyway - nothing to do here... */
		if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
		    mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
			continue;

		/* Check to see if there are inactive TIDs on this queue */
		for_each_set_bit(tid, &queue_tid_bitmap,
				 IWL_MAX_TID_COUNT + 1) {
			if (time_after(mvm->queue_info[i].last_frame_time[tid] +
				       IWL_MVM_DQA_QUEUE_TIMEOUT, now))
				continue;

			inactive_tid_bitmap |= BIT(tid);
		}

		/* If all TIDs are active - finish check on this queue */
		if (!inactive_tid_bitmap)
			continue;

		/*
		 * If we are here - the queue hadn't been served recently and is
		 * in use
		 */

		sta_id = mvm->queue_info[i].ra_sta_id;
		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);

		/*
		 * If the STA doesn't exist anymore, it isn't an error. It could
		 * be that it was removed since getting the queues, and in this
		 * case it should've inactivated its queues anyway.
		 */
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvmsta = iwl_mvm_sta_from_mac80211(sta);

		spin_lock_bh(&mvmsta->lock);
		ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
						   inactive_tid_bitmap,
						   &unshare_queues,
						   &changetid_queues);
		if (ret >= 0 && free_queue < 0) {
			queue_owner = sta;
			free_queue = ret;
		}
		/* only unlock sta lock - we still need the queue info lock */
		spin_unlock_bh(&mvmsta->lock);
	}


	/* Reconfigure queues requiring reconfiguation */
	for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
		iwl_mvm_unshare_queue(mvm, i);
	for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
		iwl_mvm_change_queue_tid(mvm, i);

	if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
		ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
						  alloc_for_sta);
		if (ret) {
			rcu_read_unlock();
			return ret;
		}
	}

	rcu_read_unlock();

	return free_queue;
}

static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
				   struct ieee80211_sta *sta, u8 ac, int tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = IWL_FRAME_LIMIT,
	};
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
	int queue = -1;
	unsigned long disable_agg_tids = 0;
	enum iwl_mvm_agg_state queue_state;
	bool shared_queue = false, inc_ssn;
	int ssn;
	unsigned long tfd_queue_mask;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	if (iwl_mvm_has_new_tx_api(mvm))
		return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);

	spin_lock_bh(&mvmsta->lock);
	tfd_queue_mask = mvmsta->tfd_queue_msk;
	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
	spin_unlock_bh(&mvmsta->lock);

	if (tid == IWL_MAX_TID_COUNT) {
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_MGMT_QUEUE,
						IWL_MVM_DQA_MAX_MGMT_QUEUE);
		if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
			IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
					    queue);

		/* If no such queue is found, we'll use a DATA queue instead */
	}

	if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
	    (mvm->queue_info[mvmsta->reserved_queue].status ==
			IWL_MVM_QUEUE_RESERVED)) {
		queue = mvmsta->reserved_queue;
		mvm->queue_info[queue].reserved = true;
		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
	}

	if (queue < 0)
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
						IWL_MVM_DQA_MAX_DATA_QUEUE);
	if (queue < 0) {
		/* try harder - perhaps kill an inactive queue */
		queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
	}

	/* No free queue - we'll have to share */
	if (queue <= 0) {
		queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
		if (queue > 0) {
			shared_queue = true;
			mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
		}
	}

	/*
	 * Mark TXQ as ready, even though it hasn't been fully configured yet,
	 * to make sure no one else takes it.
	 * This will allow avoiding re-acquiring the lock at the end of the
	 * configuration. On error we'll mark it back as free.
	 */
	if (queue > 0 && !shared_queue)
		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;

	/* This shouldn't happen - out of queues */
	if (WARN_ON(queue <= 0)) {
		IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
			tid, cfg.sta_id);
		return queue;
	}

	/*
	 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
	 * but for configuring the SCD to send A-MPDUs we need to mark the queue
	 * as aggregatable.
	 * Mark all DATA queues as allowing to be aggregated at some point
	 */
	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Allocating %squeue #%d to sta %d on tid %d\n",
			    shared_queue ? "shared " : "", queue,
			    mvmsta->sta_id, tid);

	if (shared_queue) {
		/* Disable any open aggs on this queue */
		disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);

		if (disable_agg_tids) {
			IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
					    queue);
			iwl_mvm_invalidate_sta_queue(mvm, queue,
						     disable_agg_tids, false);
		}
	}

	inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);

	/*
	 * Mark queue as shared in transport if shared
	 * Note this has to be done after queue enablement because enablement
	 * can also set this value, and there is no indication there to shared
	 * queues
	 */
	if (shared_queue)
		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);

	spin_lock_bh(&mvmsta->lock);
	/*
	 * This looks racy, but it is not. We have only one packet for
	 * this ra/tid in our Tx path since we stop the Qdisc when we
	 * need to allocate a new TFD queue.
	 */
	if (inc_ssn) {
		mvmsta->tid_data[tid].seq_number += 0x10;
		ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
	}
	mvmsta->tid_data[tid].txq_id = queue;
	mvmsta->tfd_queue_msk |= BIT(queue);
	queue_state = mvmsta->tid_data[tid].state;

	if (mvmsta->reserved_queue == queue)
		mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
	spin_unlock_bh(&mvmsta->lock);

	if (!shared_queue) {
		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
		if (ret)
			goto out_err;

		/* If we need to re-enable aggregations... */
		if (queue_state == IWL_AGG_ON) {
			ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
			if (ret)
				goto out_err;
		}
	} else {
		/* Redirect queue, if needed */
		ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
					     wdg_timeout, false,
					     iwl_mvm_txq_from_tid(sta, tid));
		if (ret)
			goto out_err;
	}

	return 0;

out_err:
	iwl_mvm_disable_txq(mvm, sta, queue, tid, 0);

	return ret;
}

static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
{
	if (tid == IWL_MAX_TID_COUNT)
		return IEEE80211_AC_VO; /* MGMT */

	return tid_to_mac80211_ac[tid];
}

void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
{
	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
					   add_stream_wk);

	mutex_lock(&mvm->mutex);

	iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);

	while (!list_empty(&mvm->add_stream_txqs)) {
		struct iwl_mvm_txq *mvmtxq;
		struct ieee80211_txq *txq;
		u8 tid;

		mvmtxq = list_first_entry(&mvm->add_stream_txqs,
					  struct iwl_mvm_txq, list);

		txq = container_of((void *)mvmtxq, struct ieee80211_txq,
				   drv_priv);
		tid = txq->tid;
		if (tid == IEEE80211_NUM_TIDS)
			tid = IWL_MAX_TID_COUNT;

		iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid);
		list_del_init(&mvmtxq->list);
		iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
	}

	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta,
				      enum nl80211_iftype vif_type)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	int queue;

	/* queue reserving is disabled on new TX path */
	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
		return 0;

	/* run the general cleanup/unsharing of queues */
	iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);

	/* Make sure we have free resources for this STA */
	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
	     IWL_MVM_QUEUE_FREE))
		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
	else
		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
						IWL_MVM_DQA_MIN_DATA_QUEUE,
						IWL_MVM_DQA_MAX_DATA_QUEUE);
	if (queue < 0) {
		/* try again - this time kick out a queue if needed */
		queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
		if (queue < 0) {
			IWL_ERR(mvm, "No available queues for new station\n");
			return -ENOSPC;
		}
	}
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;

	mvmsta->reserved_queue = queue;

	IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
			    queue, mvmsta->sta_id);

	return 0;
}

/*
 * In DQA mode, after a HW restart the queues should be allocated as before, in
 * order to avoid race conditions when there are shared queues. This function
 * does the re-mapping and queue allocation.
 *
 * Note that re-enabling aggregations isn't done in this function.
 */
static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
						 struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	unsigned int wdg =
		iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
	int i;
	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvm_sta->sta_id,
		.frame_limit = IWL_FRAME_LIMIT,
	};

	/* Make sure reserved queue is still marked as such (if allocated) */
	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
		mvm->queue_info[mvm_sta->reserved_queue].status =
			IWL_MVM_QUEUE_RESERVED;

	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
		struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
		int txq_id = tid_data->txq_id;
		int ac;

		if (txq_id == IWL_MVM_INVALID_QUEUE)
			continue;

		ac = tid_to_mac80211_ac[i];

		if (iwl_mvm_has_new_tx_api(mvm)) {
			IWL_DEBUG_TX_QUEUES(mvm,
					    "Re-mapping sta %d tid %d\n",
					    mvm_sta->sta_id, i);
			txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
							 i, wdg);
			tid_data->txq_id = txq_id;

			/*
			 * Since we don't set the seq number after reset, and HW
			 * sets it now, FW reset will cause the seq num to start
			 * at 0 again, so driver will need to update it
			 * internally as well, so it keeps in sync with real val
			 */
			tid_data->seq_number = 0;
		} else {
			u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);

			cfg.tid = i;
			cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
			cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
					 txq_id ==
					 IWL_MVM_DQA_BSS_CLIENT_QUEUE);

			IWL_DEBUG_TX_QUEUES(mvm,
					    "Re-mapping sta %d tid %d to queue %d\n",
					    mvm_sta->sta_id, i, txq_id);

			iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
			mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
		}
	}
}

static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
				      struct iwl_mvm_int_sta *sta,
				      const u8 *addr,
				      u16 mac_id, u16 color)
{
	struct iwl_mvm_add_sta_cmd cmd;
	int ret;
	u32 status = ADD_STA_SUCCESS;

	lockdep_assert_held(&mvm->mutex);

	memset(&cmd, 0, sizeof(cmd));
	cmd.sta_id = sta->sta_id;
	cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
							     color));
	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
		cmd.station_type = sta->type;

	if (!iwl_mvm_has_new_tx_api(mvm))
		cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(0xffff);

	if (addr)
		memcpy(cmd.addr, addr, ETH_ALEN);

	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);
	if (ret)
		return ret;

	switch (status & IWL_ADD_STA_STATUS_MASK) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
		return 0;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
			status);
		break;
	}
	return ret;
}

int iwl_mvm_add_sta(struct iwl_mvm *mvm,
		    struct ieee80211_vif *vif,
		    struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_rxq_dup_data *dup_data;
	int i, ret, sta_id;
	bool sta_update = false;
	unsigned int sta_flags = 0;

	lockdep_assert_held(&mvm->mutex);

	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
		sta_id = iwl_mvm_find_free_sta_id(mvm,
						  ieee80211_vif_type_p2p(vif));
	else
		sta_id = mvm_sta->sta_id;

	if (sta_id == IWL_MVM_INVALID_STA)
		return -ENOSPC;

	spin_lock_init(&mvm_sta->lock);

	/* if this is a HW restart re-alloc existing queues */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		struct iwl_mvm_int_sta tmp_sta = {
			.sta_id = sta_id,
			.type = mvm_sta->sta_type,
		};

		/*
		 * First add an empty station since allocating
		 * a queue requires a valid station
		 */
		ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
						 mvmvif->id, mvmvif->color);
		if (ret)
			goto err;

		iwl_mvm_realloc_queues_after_restart(mvm, sta);
		sta_update = true;
		sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
		goto update_fw;
	}

	mvm_sta->sta_id = sta_id;
	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
						      mvmvif->color);
	mvm_sta->vif = vif;
	if (!mvm->trans->cfg->gen2)
		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
	else
		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
	mvm_sta->tx_protection = 0;
	mvm_sta->tt_tx_protection = false;
	mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;

	/* HW restart, don't assume the memory has been zeroed */
	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
	mvm_sta->tfd_queue_msk = 0;

	/* for HW restart - reset everything but the sequence number */
	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
		u16 seq = mvm_sta->tid_data[i].seq_number;
		memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
		mvm_sta->tid_data[i].seq_number = seq;

		/*
		 * Mark all queues for this STA as unallocated and defer TX
		 * frames until the queue is allocated
		 */
		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
	}

	for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
		struct iwl_mvm_txq *mvmtxq =
			iwl_mvm_txq_from_mac80211(sta->txq[i]);

		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
		INIT_LIST_HEAD(&mvmtxq->list);
		atomic_set(&mvmtxq->tx_request, 0);
	}

	mvm_sta->agg_tids = 0;

	if (iwl_mvm_has_new_rx_api(mvm) &&
	    !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		int q;

		dup_data = kcalloc(mvm->trans->num_rx_queues,
				   sizeof(*dup_data), GFP_KERNEL);
		if (!dup_data)
			return -ENOMEM;
		/*
		 * Initialize all the last_seq values to 0xffff which can never
		 * compare equal to the frame's seq_ctrl in the check in
		 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
		 * number and fragmented packets don't reach that function.
		 *
		 * This thus allows receiving a packet with seqno 0 and the
		 * retry bit set as the very first packet on a new TID.
		 */
		for (q = 0; q < mvm->trans->num_rx_queues; q++)
			memset(dup_data[q].last_seq, 0xff,
			       sizeof(dup_data[q].last_seq));
		mvm_sta->dup_data = dup_data;
	}

	if (!iwl_mvm_has_new_tx_api(mvm)) {
		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
						 ieee80211_vif_type_p2p(vif));
		if (ret)
			goto err;
	}

	/*
	 * if rs is registered with mac80211, then "add station" will be handled
	 * via the corresponding ops, otherwise need to notify rate scaling here
	 */
	if (iwl_mvm_has_tlc_offload(mvm))
		iwl_mvm_rs_add_sta(mvm, mvm_sta);

	iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);

update_fw:
	ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
	if (ret)
		goto err;

	if (vif->type == NL80211_IFTYPE_STATION) {
		if (!sta->tdls) {
			WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
			mvmvif->ap_sta_id = sta_id;
		} else {
			WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
		}
	}

	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);

	return 0;

err:
	return ret;
}

int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
		      bool drain)
{
	struct iwl_mvm_add_sta_cmd cmd = {};
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
	cmd.sta_id = mvmsta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
	cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);
	if (ret)
		return ret;

	switch (status & IWL_ADD_STA_STATUS_MASK) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
			       mvmsta->sta_id);
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
			mvmsta->sta_id);
		break;
	}

	return ret;
}

/*
 * Remove a station from the FW table. Before sending the command to remove
 * the station validate that the station is indeed known to the driver (sanity
 * only).
 */
static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
		.sta_id = sta_id,
	};
	int ret;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	/* Note: internal stations are marked as error values */
	if (!sta) {
		IWL_ERR(mvm, "Invalid station id\n");
		return -EINVAL;
	}

	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
				   sizeof(rm_sta_cmd), &rm_sta_cmd);
	if (ret) {
		IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
		return ret;
	}

	return 0;
}

static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	int i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
		if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
			continue;

		iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i,
				    0);
		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
	}

	for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
		struct iwl_mvm_txq *mvmtxq =
			iwl_mvm_txq_from_mac80211(sta->txq[i]);

		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
	}
}

int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
				  struct iwl_mvm_sta *mvm_sta)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
		u16 txq_id;
		int ret;

		spin_lock_bh(&mvm_sta->lock);
		txq_id = mvm_sta->tid_data[i].txq_id;
		spin_unlock_bh(&mvm_sta->lock);

		if (txq_id == IWL_MVM_INVALID_QUEUE)
			continue;

		ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
		if (ret)
			return ret;
	}

	return 0;
}

int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
		   struct ieee80211_vif *vif,
		   struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	u8 sta_id = mvm_sta->sta_id;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	if (iwl_mvm_has_new_rx_api(mvm))
		kfree(mvm_sta->dup_data);

	ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
	if (ret)
		return ret;

	/* flush its queues here since we are freeing mvm_sta */
	ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
	if (ret)
		return ret;
	if (iwl_mvm_has_new_tx_api(mvm)) {
		ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
	} else {
		u32 q_mask = mvm_sta->tfd_queue_msk;

		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
						     q_mask);
	}
	if (ret)
		return ret;

	ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);

	iwl_mvm_disable_sta_queues(mvm, vif, sta);

	/* If there is a TXQ still marked as reserved - free it */
	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
		u8 reserved_txq = mvm_sta->reserved_queue;
		enum iwl_mvm_queue_status *status;

		/*
		 * If no traffic has gone through the reserved TXQ - it
		 * is still marked as IWL_MVM_QUEUE_RESERVED, and
		 * should be manually marked as free again
		 */
		status = &mvm->queue_info[reserved_txq].status;
		if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
			 (*status != IWL_MVM_QUEUE_FREE),
			 "sta_id %d reserved txq %d status %d",
			 sta_id, reserved_txq, *status))
			return -EINVAL;

		*status = IWL_MVM_QUEUE_FREE;
	}

	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id == sta_id) {
		/* if associated - we can't remove the AP STA now */
		if (vif->bss_conf.assoc)
			return ret;

		/* unassoc - go ahead - remove the AP STA now */
		mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;

		/* clear d0i3_ap_sta_id if no longer relevant */
		if (mvm->d0i3_ap_sta_id == sta_id)
			mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
	}

	/*
	 * This shouldn't happen - the TDLS channel switch should be canceled
	 * before the STA is removed.
	 */
	if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
		mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
		cancel_delayed_work(&mvm->tdls_cs.dwork);
	}

	/*
	 * Make sure that the tx response code sees the station as -EBUSY and
	 * calls the drain worker.
	 */
	spin_lock_bh(&mvm_sta->lock);
	spin_unlock_bh(&mvm_sta->lock);

	ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);

	return ret;
}

int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
		      struct ieee80211_vif *vif,
		      u8 sta_id)
{
	int ret = iwl_mvm_rm_sta_common(mvm, sta_id);

	lockdep_assert_held(&mvm->mutex);

	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
	return ret;
}

int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
			     struct iwl_mvm_int_sta *sta,
			     u32 qmask, enum nl80211_iftype iftype,
			     enum iwl_sta_type type)
{
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
	    sta->sta_id == IWL_MVM_INVALID_STA) {
		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
			return -ENOSPC;
	}

	sta->tfd_queue_msk = qmask;
	sta->type = type;

	/* put a non-NULL value so iterating over the stations won't stop */
	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
	return 0;
}

void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
{
	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
	sta->sta_id = IWL_MVM_INVALID_STA;
}

static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
					  u8 sta_id, u8 fifo)
{
	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
					mvm->cfg->base_params->wd_timeout :
					IWL_WATCHDOG_DISABLED;

	if (iwl_mvm_has_new_tx_api(mvm)) {
		int tvqm_queue =
			iwl_mvm_tvqm_enable_txq(mvm, sta_id,
						IWL_MAX_TID_COUNT,
						wdg_timeout);
		*queue = tvqm_queue;
	} else {
		struct iwl_trans_txq_scd_cfg cfg = {
			.fifo = fifo,
			.sta_id = sta_id,
			.tid = IWL_MAX_TID_COUNT,
			.aggregate = false,
			.frame_limit = IWL_FRAME_LIMIT,
		};

		iwl_mvm_enable_txq(mvm, NULL, *queue, 0, &cfg, wdg_timeout);
	}
}

int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

	/* Allocate aux station and assign to it the aux queue */
	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
				       NL80211_IFTYPE_UNSPECIFIED,
				       IWL_STA_AUX_ACTIVITY);
	if (ret)
		return ret;

	/* Map Aux queue to fifo - needs to happen before adding Aux station */
	if (!iwl_mvm_has_new_tx_api(mvm))
		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
					      mvm->aux_sta.sta_id,
					      IWL_MVM_TX_FIFO_MCAST);

	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
					 MAC_INDEX_AUX, 0);
	if (ret) {
		iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
		return ret;
	}

	/*
	 * For 22000 firmware and on we cannot add queue to a station unknown
	 * to firmware so enable queue here - after the station was added
	 */
	if (iwl_mvm_has_new_tx_api(mvm))
		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
					      mvm->aux_sta.sta_id,
					      IWL_MVM_TX_FIFO_MCAST);

	return 0;
}

int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	lockdep_assert_held(&mvm->mutex);

	/* Map snif queue to fifo - must happen before adding snif station */
	if (!iwl_mvm_has_new_tx_api(mvm))
		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
					      mvm->snif_sta.sta_id,
					      IWL_MVM_TX_FIFO_BE);

	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
					 mvmvif->id, 0);
	if (ret)
		return ret;

	/*
	 * For 22000 firmware and on we cannot add queue to a station unknown
	 * to firmware so enable queue here - after the station was added
	 */
	if (iwl_mvm_has_new_tx_api(mvm))
		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
					      mvm->snif_sta.sta_id,
					      IWL_MVM_TX_FIFO_BE);

	return 0;
}

int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
	ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");

	return ret;
}

void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
{
	iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
}

void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
{
	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
}

/*
 * Send the add station command for the vif's broadcast station.
 * Assumes that the station was already allocated.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add.
 */
int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
	const u8 *baddr = _baddr;
	int queue;
	int ret;
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, false, false);
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = IWL_MVM_TX_FIFO_VO,
		.sta_id = mvmvif->bcast_sta.sta_id,
		.tid = IWL_MAX_TID_COUNT,
		.aggregate = false,
		.frame_limit = IWL_FRAME_LIMIT,
	};

	lockdep_assert_held(&mvm->mutex);

	if (!iwl_mvm_has_new_tx_api(mvm)) {
		if (vif->type == NL80211_IFTYPE_AP ||
		    vif->type == NL80211_IFTYPE_ADHOC)
			queue = mvm->probe_queue;
		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
			queue = mvm->p2p_dev_queue;
		else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
			return -EINVAL;

		bsta->tfd_queue_msk |= BIT(queue);

		iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
	}

	if (vif->type == NL80211_IFTYPE_ADHOC)
		baddr = vif->bss_conf.bssid;

	if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
		return -ENOSPC;

	ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
					 mvmvif->id, mvmvif->color);
	if (ret)
		return ret;

	/*
	 * For 22000 firmware and on we cannot add queue to a station unknown
	 * to firmware so enable queue here - after the station was added
	 */
	if (iwl_mvm_has_new_tx_api(mvm)) {
		queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
						IWL_MAX_TID_COUNT,
						wdg_timeout);

		if (vif->type == NL80211_IFTYPE_AP ||
		    vif->type == NL80211_IFTYPE_ADHOC)
			mvm->probe_queue = queue;
		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
			mvm->p2p_dev_queue = queue;
	}

	return 0;
}

static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
					  struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int queue;

	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_ADHOC:
		queue = mvm->probe_queue;
		break;
	case NL80211_IFTYPE_P2P_DEVICE:
		queue = mvm->p2p_dev_queue;
		break;
	default:
		WARN(1, "Can't free bcast queue on vif type %d\n",
		     vif->type);
		return;
	}

	iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0);
	if (iwl_mvm_has_new_tx_api(mvm))
		return;

	WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
	mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
}

/* Send the FW a request to remove the station from it's internal data
 * structures, but DO NOT remove the entry from the local data structures. */
int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_free_bcast_sta_queues(mvm, vif);

	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");
	return ret;
}

int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	lockdep_assert_held(&mvm->mutex);

	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
					ieee80211_vif_type_p2p(vif),
					IWL_STA_GENERAL_PURPOSE);
}

/* Allocate a new station entry for the broadcast station to the given vif,
 * and send it to the FW.
 * Note that each P2P mac should have its own broadcast station.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the broadcast station is added
 * @bsta: the broadcast station to add. */
int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
	int ret;

	lockdep_assert_held(&mvm->mutex);

	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
	if (ret)
		return ret;

	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);

	if (ret)
		iwl_mvm_dealloc_int_sta(mvm, bsta);

	return ret;
}

void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
}

/*
 * Send the FW a request to remove the station from it's internal data
 * structures, and in addition remove it from the local data structure.
 */
int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	int ret;

	lockdep_assert_held(&mvm->mutex);

	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);

	iwl_mvm_dealloc_bcast_sta(mvm, vif);

	return ret;
}

/*
 * Allocate a new station entry for the multicast station to the given vif,
 * and send it to the FW.
 * Note that each AP/GO mac should have its own multicast station.
 *
 * @mvm: the mvm component
 * @vif: the interface to which the multicast station is added
 */
int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
	static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
	const u8 *maddr = _maddr;
	struct iwl_trans_txq_scd_cfg cfg = {
		.fifo = IWL_MVM_TX_FIFO_MCAST,
		.sta_id = msta->sta_id,
		.tid = 0,
		.aggregate = false,
		.frame_limit = IWL_FRAME_LIMIT,
	};
	unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
	int ret;

	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
		    vif->type != NL80211_IFTYPE_ADHOC))
		return -ENOTSUPP;

	/*
	 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
	 * invalid, so make sure we use the queue we want.
	 * Note that this is done here as we want to avoid making DQA
	 * changes in mac80211 layer.
	 */
	if (vif->type == NL80211_IFTYPE_ADHOC)
		mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;

	/*
	 * While in previous FWs we had to exclude cab queue from TFD queue
	 * mask, now it is needed as any other queue.
	 */
	if (!iwl_mvm_has_new_tx_api(mvm) &&
	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
		iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
				   timeout);
		msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
	}
	ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
					 mvmvif->id, mvmvif->color);
	if (ret) {
		iwl_mvm_dealloc_int_sta(mvm, msta);
		return ret;
	}

	/*
	 * Enable cab queue after the ADD_STA command is sent.
	 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
	 * command with unknown station id, and for FW that doesn't support
	 * station API since the cab queue is not included in the
	 * tfd_queue_mask.
	 */
	if (iwl_mvm_has_new_tx_api(mvm)) {
		int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
						    0,
						    timeout);
		mvmvif->cab_queue = queue;
	} else if (!fw_has_api(&mvm->fw->ucode_capa,
			       IWL_UCODE_TLV_API_STA_TYPE))
		iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
				   timeout);

	if (mvmvif->ap_wep_key) {
		u8 key_offset = iwl_mvm_set_fw_key_idx(mvm);

		__set_bit(key_offset, mvm->fw_key_table);

		if (key_offset == STA_KEY_IDX_INVALID)
			return -ENOSPC;

		ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id,
					   mvmvif->ap_wep_key, true, 0, NULL, 0,
					   key_offset, 0);
		if (ret)
			return ret;
	}

	return 0;
}

static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
				    struct ieee80211_key_conf *keyconf,
				    bool mcast)
{
	union {
		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
		struct iwl_mvm_add_sta_key_cmd cmd;
	} u = {};
	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
	__le16 key_flags;
	int ret, size;
	u32 status;

	/* This is a valid situation for GTK removal */
	if (sta_id == IWL_MVM_INVALID_STA)
		return 0;

	key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
				 STA_KEY_FLG_KEYID_MSK);
	key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
	key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);

	if (mcast)
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);

	/*
	 * The fields assigned here are in the same location at the start
	 * of the command, so we can do this union trick.
	 */
	u.cmd.common.key_flags = key_flags;
	u.cmd.common.key_offset = keyconf->hw_key_idx;
	u.cmd.common.sta_id = sta_id;

	size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
					  &status);

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
		break;
	}

	return ret;
}

/*
 * Send the FW a request to remove the station from it's internal data
 * structures, and in addition remove it from the local data structure.
 */
int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);

	iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0);

	if (mvmvif->ap_wep_key) {
		int i;

		if (!__test_and_clear_bit(mvmvif->ap_wep_key->hw_key_idx,
					  mvm->fw_key_table)) {
			IWL_ERR(mvm, "offset %d not used in fw key table.\n",
				mvmvif->ap_wep_key->hw_key_idx);
			return -ENOENT;
		}

		/* track which key was deleted last */
		for (i = 0; i < STA_KEY_MAX_NUM; i++) {
			if (mvm->fw_key_deleted[i] < U8_MAX)
				mvm->fw_key_deleted[i]++;
		}
		mvm->fw_key_deleted[mvmvif->ap_wep_key->hw_key_idx] = 0;
		ret = __iwl_mvm_remove_sta_key(mvm, mvmvif->mcast_sta.sta_id,
					       mvmvif->ap_wep_key, true);
		if (ret)
			return ret;
	}

	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
	if (ret)
		IWL_WARN(mvm, "Failed sending remove station\n");

	return ret;
}

#define IWL_MAX_RX_BA_SESSIONS 16

static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
{
	struct iwl_mvm_delba_notif notif = {
		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
		.metadata.sync = 1,
		.delba.baid = baid,
	};
	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
};

static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
				 struct iwl_mvm_baid_data *data)
{
	int i;

	iwl_mvm_sync_rxq_del_ba(mvm, data->baid);

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		int j;
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];
		struct iwl_mvm_reorder_buf_entry *entries =
			&data->entries[i * data->entries_per_queue];

		spin_lock_bh(&reorder_buf->lock);
		if (likely(!reorder_buf->num_stored)) {
			spin_unlock_bh(&reorder_buf->lock);
			continue;
		}

		/*
		 * This shouldn't happen in regular DELBA since the internal
		 * delBA notification should trigger a release of all frames in
		 * the reorder buffer.
		 */
		WARN_ON(1);

		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_purge(&entries[j].e.frames);
		/*
		 * Prevent timer re-arm. This prevents a very far fetched case
		 * where we timed out on the notification. There may be prior
		 * RX frames pending in the RX queue before the notification
		 * that might get processed between now and the actual deletion
		 * and we would re-arm the timer although we are deleting the
		 * reorder buffer.
		 */
		reorder_buf->removed = true;
		spin_unlock_bh(&reorder_buf->lock);
		del_timer_sync(&reorder_buf->reorder_timer);
	}
}

static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
					struct iwl_mvm_baid_data *data,
					u16 ssn, u16 buf_size)
{
	int i;

	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
		struct iwl_mvm_reorder_buffer *reorder_buf =
			&data->reorder_buf[i];
		struct iwl_mvm_reorder_buf_entry *entries =
			&data->entries[i * data->entries_per_queue];
		int j;

		reorder_buf->num_stored = 0;
		reorder_buf->head_sn = ssn;
		reorder_buf->buf_size = buf_size;
		/* rx reorder timer */
		timer_setup(&reorder_buf->reorder_timer,
			    iwl_mvm_reorder_timer_expired, 0);
		spin_lock_init(&reorder_buf->lock);
		reorder_buf->mvm = mvm;
		reorder_buf->queue = i;
		reorder_buf->valid = false;
		for (j = 0; j < reorder_buf->buf_size; j++)
			__skb_queue_head_init(&entries[j].e.frames);
	}
}

int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
		       int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_add_sta_cmd cmd = {};
	struct iwl_mvm_baid_data *baid_data = NULL;
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
		return -ENOSPC;
	}

	if (iwl_mvm_has_new_rx_api(mvm) && start) {
		u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);

		/* sparse doesn't like the __align() so don't check */
#ifndef __CHECKER__
		/*
		 * The division below will be OK if either the cache line size
		 * can be divided by the entry size (ALIGN will round up) or if
		 * if the entry size can be divided by the cache line size, in
		 * which case the ALIGN() will do nothing.
		 */
		BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
			     sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
#endif

		/*
		 * Upward align the reorder buffer size to fill an entire cache
		 * line for each queue, to avoid sharing cache lines between
		 * different queues.
		 */
		reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);

		/*
		 * Allocate here so if allocation fails we can bail out early
		 * before starting the BA session in the firmware
		 */
		baid_data = kzalloc(sizeof(*baid_data) +
				    mvm->trans->num_rx_queues *
				    reorder_buf_size,
				    GFP_KERNEL);
		if (!baid_data)
			return -ENOMEM;

		/*
		 * This division is why we need the above BUILD_BUG_ON(),
		 * if that doesn't hold then this will not be right.
		 */
		baid_data->entries_per_queue =
			reorder_buf_size / sizeof(baid_data->entries[0]);
	}

	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	if (start) {
		cmd.add_immediate_ba_tid = (u8) tid;
		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
		cmd.rx_ba_window = cpu_to_le16(buf_size);
	} else {
		cmd.remove_immediate_ba_tid = (u8) tid;
	}
	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
				  STA_MODIFY_REMOVE_BA_TID;

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);
	if (ret)
		goto out_free;

	switch (status & IWL_ADD_STA_STATUS_MASK) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
			     start ? "start" : "stopp");
		break;
	case ADD_STA_IMMEDIATE_BA_FAILURE:
		IWL_WARN(mvm, "RX BA Session refused by fw\n");
		ret = -ENOSPC;
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

	if (ret)
		goto out_free;

	if (start) {
		u8 baid;

		mvm->rx_ba_sessions++;

		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
			ret = -EINVAL;
			goto out_free;
		}
		baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
			    IWL_ADD_STA_BAID_SHIFT);
		baid_data->baid = baid;
		baid_data->timeout = timeout;
		baid_data->last_rx = jiffies;
		baid_data->rcu_ptr = &mvm->baid_map[baid];
		timer_setup(&baid_data->session_timer,
			    iwl_mvm_rx_agg_session_expired, 0);
		baid_data->mvm = mvm;
		baid_data->tid = tid;
		baid_data->sta_id = mvm_sta->sta_id;

		mvm_sta->tid_to_baid[tid] = baid;
		if (timeout)
			mod_timer(&baid_data->session_timer,
				  TU_TO_EXP_TIME(timeout * 2));

		iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
		/*
		 * protect the BA data with RCU to cover a case where our
		 * internal RX sync mechanism will timeout (not that it's
		 * supposed to happen) and we will free the session data while
		 * RX is being processed in parallel
		 */
		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
			     mvm_sta->sta_id, tid, baid);
		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
	} else  {
		u8 baid = mvm_sta->tid_to_baid[tid];

		if (mvm->rx_ba_sessions > 0)
			/* check that restart flow didn't zero the counter */
			mvm->rx_ba_sessions--;
		if (!iwl_mvm_has_new_rx_api(mvm))
			return 0;

		if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
			return -EINVAL;

		baid_data = rcu_access_pointer(mvm->baid_map[baid]);
		if (WARN_ON(!baid_data))
			return -EINVAL;

		/* synchronize all rx queues so we can safely delete */
		iwl_mvm_free_reorder(mvm, baid_data);
		del_timer_sync(&baid_data->session_timer);
		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
		kfree_rcu(baid_data, rcu_head);
		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
	}
	return 0;

out_free:
	kfree(baid_data);
	return ret;
}

int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
		       int tid, u8 queue, bool start)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_add_sta_cmd cmd = {};
	int ret;
	u32 status;

	lockdep_assert_held(&mvm->mutex);

	if (start) {
		mvm_sta->tfd_queue_msk |= BIT(queue);
		mvm_sta->tid_disable_agg &= ~BIT(tid);
	} else {
		/* In DQA-mode the queue isn't removed on agg termination */
		mvm_sta->tid_disable_agg |= BIT(tid);
	}

	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
	cmd.sta_id = mvm_sta->sta_id;
	cmd.add_modify = STA_MODE_MODIFY;
	if (!iwl_mvm_has_new_tx_api(mvm))
		cmd.modify_mask = STA_MODIFY_QUEUES;
	cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
	cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
	cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);

	status = ADD_STA_SUCCESS;
	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
					  iwl_mvm_add_sta_cmd_size(mvm),
					  &cmd, &status);
	if (ret)
		return ret;

	switch (status & IWL_ADD_STA_STATUS_MASK) {
	case ADD_STA_SUCCESS:
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
			start ? "start" : "stopp", status);
		break;
	}

	return ret;
}

const u8 tid_to_mac80211_ac[] = {
	IEEE80211_AC_BE,
	IEEE80211_AC_BK,
	IEEE80211_AC_BK,
	IEEE80211_AC_BE,
	IEEE80211_AC_VI,
	IEEE80211_AC_VI,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO,
	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
};

static const u8 tid_to_ucode_ac[] = {
	AC_BE,
	AC_BK,
	AC_BK,
	AC_BE,
	AC_VI,
	AC_VI,
	AC_VO,
	AC_VO,
};

int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data;
	u16 normalized_ssn;
	u16 txq_id;
	int ret;

	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
		return -EINVAL;

	if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
	    mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
		IWL_ERR(mvm,
			"Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
			mvmsta->tid_data[tid].state);
		return -ENXIO;
	}

	lockdep_assert_held(&mvm->mutex);

	if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
	    iwl_mvm_has_new_tx_api(mvm)) {
		u8 ac = tid_to_mac80211_ac[tid];

		ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
		if (ret)
			return ret;
	}

	spin_lock_bh(&mvmsta->lock);

	/* possible race condition - we entered D0i3 while starting agg */
	if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
		spin_unlock_bh(&mvmsta->lock);
		IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
		return -EIO;
	}

	/*
	 * Note the possible cases:
	 *  1. An enabled TXQ - TXQ needs to become agg'ed
	 *  2. The TXQ hasn't yet been enabled, so find a free one and mark
	 *	it as reserved
	 */
	txq_id = mvmsta->tid_data[tid].txq_id;
	if (txq_id == IWL_MVM_INVALID_QUEUE) {
		ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
					      IWL_MVM_DQA_MIN_DATA_QUEUE,
					      IWL_MVM_DQA_MAX_DATA_QUEUE);
		if (ret < 0) {
			IWL_ERR(mvm, "Failed to allocate agg queue\n");
			goto out;
		}

		txq_id = ret;

		/* TXQ hasn't yet been enabled, so mark it only as reserved */
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
	} else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
		ret = -ENXIO;
		IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
			tid, IWL_MAX_HW_QUEUES - 1);
		goto out;

	} else if (unlikely(mvm->queue_info[txq_id].status ==
			    IWL_MVM_QUEUE_SHARED)) {
		ret = -ENXIO;
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Can't start tid %d agg on shared queue!\n",
				    tid);
		goto out;
	}

	IWL_DEBUG_TX_QUEUES(mvm,
			    "AGG for tid %d will be on queue #%d\n",
			    tid, txq_id);

	tid_data = &mvmsta->tid_data[tid];
	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
	tid_data->txq_id = txq_id;
	*ssn = tid_data->ssn;

	IWL_DEBUG_TX_QUEUES(mvm,
			    "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->ssn,
			    tid_data->next_reclaimed);

	/*
	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
	 * to align the wrap around of ssn so we compare relevant values.
	 */
	normalized_ssn = tid_data->ssn;
	if (mvm->trans->cfg->gen2)
		normalized_ssn &= 0xff;

	if (normalized_ssn == tid_data->next_reclaimed) {
		tid_data->state = IWL_AGG_STARTING;
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
	} else {
		tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
	}

	ret = 0;

out:
	spin_unlock_bh(&mvmsta->lock);

	return ret;
}

int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid, u16 buf_size,
			    bool amsdu)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	unsigned int wdg_timeout =
		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
	int queue, ret;
	bool alloc_queue = true;
	enum iwl_mvm_queue_status queue_status;
	u16 ssn;

	struct iwl_trans_txq_scd_cfg cfg = {
		.sta_id = mvmsta->sta_id,
		.tid = tid,
		.frame_limit = buf_size,
		.aggregate = true,
	};

	/*
	 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
	 * manager, so this function should never be called in this case.
	 */
	if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
		return -EINVAL;

	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
		     != IWL_MAX_TID_COUNT);

	spin_lock_bh(&mvmsta->lock);
	ssn = tid_data->ssn;
	queue = tid_data->txq_id;
	tid_data->state = IWL_AGG_ON;
	mvmsta->agg_tids |= BIT(tid);
	tid_data->ssn = 0xffff;
	tid_data->amsdu_in_ampdu_allowed = amsdu;
	spin_unlock_bh(&mvmsta->lock);

	if (iwl_mvm_has_new_tx_api(mvm)) {
		/*
		 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
		 * would have failed, so if we are here there is no need to
		 * allocate a queue.
		 * However, if aggregation size is different than the default
		 * size, the scheduler should be reconfigured.
		 * We cannot do this with the new TX API, so return unsupported
		 * for now, until it will be offloaded to firmware..
		 * Note that if SCD default value changes - this condition
		 * should be updated as well.
		 */
		if (buf_size < IWL_FRAME_LIMIT)
			return -ENOTSUPP;

		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
		if (ret)
			return -EIO;
		goto out;
	}

	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];

	queue_status = mvm->queue_info[queue].status;

	/* Maybe there is no need to even alloc a queue... */
	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
		alloc_queue = false;

	/*
	 * Only reconfig the SCD for the queue if the window size has
	 * changed from current (become smaller)
	 */
	if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
		/*
		 * If reconfiguring an existing queue, it first must be
		 * drained
		 */
		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
						     BIT(queue));
		if (ret) {
			IWL_ERR(mvm,
				"Error draining queue before reconfig\n");
			return ret;
		}

		ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
					   mvmsta->sta_id, tid,
					   buf_size, ssn);
		if (ret) {
			IWL_ERR(mvm,
				"Error reconfiguring TXQ #%d\n", queue);
			return ret;
		}
	}

	if (alloc_queue)
		iwl_mvm_enable_txq(mvm, sta, queue, ssn,
				   &cfg, wdg_timeout);

	/* Send ADD_STA command to enable aggs only if the queue isn't shared */
	if (queue_status != IWL_MVM_QUEUE_SHARED) {
		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
		if (ret)
			return -EIO;
	}

	/* No need to mark as reserved */
	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;

out:
	/*
	 * Even though in theory the peer could have different
	 * aggregation reorder buffer sizes for different sessions,
	 * our ucode doesn't allow for that and has a global limit
	 * for each station. Therefore, use the minimum of all the
	 * aggregation sessions and our default value.
	 */
	mvmsta->max_agg_bufsize =
		min(mvmsta->max_agg_bufsize, buf_size);
	mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;

	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
		     sta->addr, tid);

	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
}

static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
					struct iwl_mvm_sta *mvmsta,
					struct iwl_mvm_tid_data *tid_data)
{
	u16 txq_id = tid_data->txq_id;

	lockdep_assert_held(&mvm->mutex);

	if (iwl_mvm_has_new_tx_api(mvm))
		return;

	/*
	 * The TXQ is marked as reserved only if no traffic came through yet
	 * This means no traffic has been sent on this TID (agg'd or not), so
	 * we no longer have use for the queue. Since it hasn't even been
	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
	 * free.
	 */
	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
		tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
	}
}

int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	int err;

	/*
	 * If mac80211 is cleaning its state, then say that we finished since
	 * our state has been cleared anyway.
	 */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		return 0;
	}

	spin_lock_bh(&mvmsta->lock);

	txq_id = tid_data->txq_id;

	IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);

	mvmsta->agg_tids &= ~BIT(tid);

	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);

	switch (tid_data->state) {
	case IWL_AGG_ON:
		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);

		IWL_DEBUG_TX_QUEUES(mvm,
				    "ssn = %d, next_recl = %d\n",
				    tid_data->ssn, tid_data->next_reclaimed);

		tid_data->ssn = 0xffff;
		tid_data->state = IWL_AGG_OFF;
		spin_unlock_bh(&mvmsta->lock);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);

		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
		return 0;
	case IWL_AGG_STARTING:
	case IWL_EMPTYING_HW_QUEUE_ADDBA:
		/*
		 * The agg session has been stopped before it was set up. This
		 * can happen when the AddBA timer times out for example.
		 */

		/* No barriers since we are under mutex */
		lockdep_assert_held(&mvm->mutex);

		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		tid_data->state = IWL_AGG_OFF;
		err = 0;
		break;
	default:
		IWL_ERR(mvm,
			"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
			mvmsta->sta_id, tid, tid_data->state);
		IWL_ERR(mvm,
			"\ttid_data->txq_id = %d\n", tid_data->txq_id);
		err = -EINVAL;
	}

	spin_unlock_bh(&mvmsta->lock);

	return err;
}

int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	u16 txq_id;
	enum iwl_mvm_agg_state old_state;

	/*
	 * First set the agg state to OFF to avoid calling
	 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
	 */
	spin_lock_bh(&mvmsta->lock);
	txq_id = tid_data->txq_id;
	IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
			    mvmsta->sta_id, tid, txq_id, tid_data->state);
	old_state = tid_data->state;
	tid_data->state = IWL_AGG_OFF;
	mvmsta->agg_tids &= ~BIT(tid);
	spin_unlock_bh(&mvmsta->lock);

	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);

	if (old_state >= IWL_AGG_ON) {
		iwl_mvm_drain_sta(mvm, mvmsta, true);

		if (iwl_mvm_has_new_tx_api(mvm)) {
			if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
						   BIT(tid), 0))
				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
			iwl_trans_wait_txq_empty(mvm->trans, txq_id);
		} else {
			if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
			iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
		}

		iwl_mvm_drain_sta(mvm, mvmsta, false);

		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
	}

	return 0;
}

static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
{
	int i, max = -1, max_offs = -1;

	lockdep_assert_held(&mvm->mutex);

	/* Pick the unused key offset with the highest 'deleted'
	 * counter. Every time a key is deleted, all the counters
	 * are incremented and the one that was just deleted is
	 * reset to zero. Thus, the highest counter is the one
	 * that was deleted longest ago. Pick that one.
	 */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (test_bit(i, mvm->fw_key_table))
			continue;
		if (mvm->fw_key_deleted[i] > max) {
			max = mvm->fw_key_deleted[i];
			max_offs = i;
		}
	}

	if (max_offs < 0)
		return STA_KEY_IDX_INVALID;

	return max_offs;
}

static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
					       struct ieee80211_vif *vif,
					       struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (sta)
		return iwl_mvm_sta_from_mac80211(sta);

	/*
	 * The device expects GTKs for station interfaces to be
	 * installed as GTKs for the AP station. If we have no
	 * station ID, then use AP's station ID.
	 */
	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
		u8 sta_id = mvmvif->ap_sta_id;

		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
					    lockdep_is_held(&mvm->mutex));

		/*
		 * It is possible that the 'sta' parameter is NULL,
		 * for example when a GTK is removed - the sta_id will then
		 * be the AP ID, and no station was passed by mac80211.
		 */
		if (IS_ERR_OR_NULL(sta))
			return NULL;

		return iwl_mvm_sta_from_mac80211(sta);
	}

	return NULL;
}

static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
				u32 sta_id,
				struct ieee80211_key_conf *key, bool mcast,
				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
				u8 key_offset, bool mfp)
{
	union {
		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
		struct iwl_mvm_add_sta_key_cmd cmd;
	} u = {};
	__le16 key_flags;
	int ret;
	u32 status;
	u16 keyidx;
	u64 pn = 0;
	int i, size;
	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);

	if (sta_id == IWL_MVM_INVALID_STA)
		return -EINVAL;

	keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
		 STA_KEY_FLG_KEYID_MSK;
	key_flags = cpu_to_le16(keyidx);
	key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
		if (new_api) {
			memcpy((void *)&u.cmd.tx_mic_key,
			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
			       IWL_MIC_KEY_SIZE);

			memcpy((void *)&u.cmd.rx_mic_key,
			       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
			       IWL_MIC_KEY_SIZE);
			pn = atomic64_read(&key->tx_pn);

		} else {
			u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
			for (i = 0; i < 5; i++)
				u.cmd_v1.tkip_rx_ttak[i] =
					cpu_to_le16(tkip_p1k[i]);
		}
		memcpy(u.cmd.common.key, key->key, key->keylen);
		break;
	case WLAN_CIPHER_SUITE_CCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
		memcpy(u.cmd.common.key, key->key, key->keylen);
		if (new_api)
			pn = atomic64_read(&key->tx_pn);
		break;
	case WLAN_CIPHER_SUITE_WEP104:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
		/* fall through */
	case WLAN_CIPHER_SUITE_WEP40:
		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
		memcpy(u.cmd.common.key + 3, key->key, key->keylen);
		break;
	case WLAN_CIPHER_SUITE_GCMP_256:
		key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
		/* fall through */
	case WLAN_CIPHER_SUITE_GCMP:
		key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
		memcpy(u.cmd.common.key, key->key, key->keylen);
		if (new_api)
			pn = atomic64_read(&key->tx_pn);
		break;
	default:
		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
		memcpy(u.cmd.common.key, key->key, key->keylen);
	}

	if (mcast)
		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
	if (mfp)
		key_flags |= cpu_to_le16(STA_KEY_MFP);

	u.cmd.common.key_offset = key_offset;
	u.cmd.common.key_flags = key_flags;
	u.cmd.common.sta_id = sta_id;

	if (new_api) {
		u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
		size = sizeof(u.cmd);
	} else {
		size = sizeof(u.cmd_v1);
	}

	status = ADD_STA_SUCCESS;
	if (cmd_flags & CMD_ASYNC)
		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
					   &u.cmd);
	else
		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
						  &u.cmd, &status);

	switch (status) {
	case ADD_STA_SUCCESS:
		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
		break;
	default:
		ret = -EIO;
		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
		break;
	}

	return ret;
}

static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
				 struct ieee80211_key_conf *keyconf,
				 u8 sta_id, bool remove_key)
{
	struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};

	/* verify the key details match the required command's expectations */
	if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
		    (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
		    (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
		return -EINVAL;

	if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
		    keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
		return -EINVAL;

	igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
	igtk_cmd.sta_id = cpu_to_le32(sta_id);

	if (remove_key) {
		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
	} else {
		struct ieee80211_key_seq seq;
		const u8 *pn;

		switch (keyconf->cipher) {
		case WLAN_CIPHER_SUITE_AES_CMAC:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
			break;
		case WLAN_CIPHER_SUITE_BIP_GMAC_128:
		case WLAN_CIPHER_SUITE_BIP_GMAC_256:
			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
			break;
		default:
			return -EINVAL;
		}

		memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
		if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
			igtk_cmd.ctrl_flags |=
				cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		pn = seq.aes_cmac.pn;
		igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
						       ((u64) pn[4] << 8) |
						       ((u64) pn[3] << 16) |
						       ((u64) pn[2] << 24) |
						       ((u64) pn[1] << 32) |
						       ((u64) pn[0] << 40));
	}

	IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
		       remove_key ? "removing" : "installing",
		       igtk_cmd.sta_id);

	if (!iwl_mvm_has_new_rx_api(mvm)) {
		struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
			.ctrl_flags = igtk_cmd.ctrl_flags,
			.key_id = igtk_cmd.key_id,
			.sta_id = igtk_cmd.sta_id,
			.receive_seq_cnt = igtk_cmd.receive_seq_cnt
		};

		memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
		       ARRAY_SIZE(igtk_cmd_v1.igtk));
		return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
					    sizeof(igtk_cmd_v1), &igtk_cmd_v1);
	}
	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
				    sizeof(igtk_cmd), &igtk_cmd);
}


static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	if (sta)
		return sta->addr;

	if (vif->type == NL80211_IFTYPE_STATION &&
	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
		u8 sta_id = mvmvif->ap_sta_id;
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
						lockdep_is_held(&mvm->mutex));
		return sta->addr;
	}


	return NULL;
}

static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
				 struct ieee80211_key_conf *keyconf,
				 u8 key_offset,
				 bool mcast)
{
	int ret;
	const u8 *addr;
	struct ieee80211_key_seq seq;
	u16 p1k[5];
	u32 sta_id;
	bool mfp = false;

	if (sta) {
		struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);

		sta_id = mvm_sta->sta_id;
		mfp = sta->mfp;
	} else if (vif->type == NL80211_IFTYPE_AP &&
		   !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

		sta_id = mvmvif->mcast_sta.sta_id;
	} else {
		IWL_ERR(mvm, "Failed to find station id\n");
		return -EINVAL;
	}

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
		/* get phase 1 key from mac80211 */
		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
					   seq.tkip.iv32, p1k, 0, key_offset,
					   mfp);
		break;
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
					   0, NULL, 0, key_offset, mfp);
		break;
	default:
		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
					   0, NULL, 0, key_offset, mfp);
	}

	return ret;
}

int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
			struct ieee80211_vif *vif,
			struct ieee80211_sta *sta,
			struct ieee80211_key_conf *keyconf,
			u8 key_offset)
{
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_INVALID_STA;
	int ret;
	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};

	lockdep_assert_held(&mvm->mutex);

	if (vif->type != NL80211_IFTYPE_AP ||
	    keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
		/* Get the station id from the mvm local station table */
		mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
		if (!mvm_sta) {
			IWL_ERR(mvm, "Failed to find station\n");
			return -EINVAL;
		}
		sta_id = mvm_sta->sta_id;

		/*
		 * It is possible that the 'sta' parameter is NULL, and thus
		 * there is a need to retrieve the sta from the local station
		 * table.
		 */
		if (!sta) {
			sta = rcu_dereference_protected(
				mvm->fw_id_to_mac_id[sta_id],
				lockdep_is_held(&mvm->mutex));
			if (IS_ERR_OR_NULL(sta)) {
				IWL_ERR(mvm, "Invalid station id\n");
				return -EINVAL;
			}
		}

		if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
			return -EINVAL;
	} else {
		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

		sta_id = mvmvif->mcast_sta.sta_id;
	}

	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
		ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
		goto end;
	}

	/* If the key_offset is not pre-assigned, we need to find a
	 * new offset to use.  In normal cases, the offset is not
	 * pre-assigned, but during HW_RESTART we want to reuse the
	 * same indices, so we pass them when this function is called.
	 *
	 * In D3 entry, we need to hardcoded the indices (because the
	 * firmware hardcodes the PTK offset to 0).  In this case, we
	 * need to make sure we don't overwrite the hw_key_idx in the
	 * keyconf structure, because otherwise we cannot configure
	 * the original ones back when resuming.
	 */
	if (key_offset == STA_KEY_IDX_INVALID) {
		key_offset  = iwl_mvm_set_fw_key_idx(mvm);
		if (key_offset == STA_KEY_IDX_INVALID)
			return -ENOSPC;
		keyconf->hw_key_idx = key_offset;
	}

	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
	if (ret)
		goto end;

	/*
	 * For WEP, the same key is used for multicast and unicast. Upload it
	 * again, using the same key offset, and now pointing the other one
	 * to the same key slot (offset).
	 * If this fails, remove the original as well.
	 */
	if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	     keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
	    sta) {
		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
					    key_offset, !mcast);
		if (ret) {
			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
			goto end;
		}
	}

	__set_bit(key_offset, mvm->fw_key_table);

end:
	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
		      sta ? sta->addr : zero_addr, ret);
	return ret;
}

int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
			   struct ieee80211_vif *vif,
			   struct ieee80211_sta *sta,
			   struct ieee80211_key_conf *keyconf)
{
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
	struct iwl_mvm_sta *mvm_sta;
	u8 sta_id = IWL_MVM_INVALID_STA;
	int ret, i;

	lockdep_assert_held(&mvm->mutex);

	/* Get the station from the mvm local station table */
	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (mvm_sta)
		sta_id = mvm_sta->sta_id;
	else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
		sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;


	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
		      keyconf->keyidx, sta_id);

	if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);

	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
			keyconf->hw_key_idx);
		return -ENOENT;
	}

	/* track which key was deleted last */
	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
		if (mvm->fw_key_deleted[i] < U8_MAX)
			mvm->fw_key_deleted[i]++;
	}
	mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;

	if (sta && !mvm_sta) {
		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
		return 0;
	}

	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
	if (ret)
		return ret;

	/* delete WEP key twice to get rid of (now useless) offset */
	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
		ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);

	return ret;
}

void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
			     struct ieee80211_vif *vif,
			     struct ieee80211_key_conf *keyconf,
			     struct ieee80211_sta *sta, u32 iv32,
			     u16 *phase1key)
{
	struct iwl_mvm_sta *mvm_sta;
	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
	bool mfp = sta ? sta->mfp : false;

	rcu_read_lock();

	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
	if (WARN_ON_ONCE(!mvm_sta))
		goto unlock;
	iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
			     mfp);

 unlock:
	rcu_read_unlock();
}

void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = mvmsta->sta_id,
		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
	};
	int ret;

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
				       struct ieee80211_sta *sta,
				       enum ieee80211_frame_release_type reason,
				       u16 cnt, u16 tids, bool more_data,
				       bool single_sta_queue)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = mvmsta->sta_id,
		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
		.sleep_tx_count = cpu_to_le16(cnt),
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
	};
	int tid, ret;
	unsigned long _tids = tids;

	/* convert TIDs to ACs - we don't support TSPEC so that's OK
	 * Note that this field is reserved and unused by firmware not
	 * supporting GO uAPSD, so it's safe to always do this.
	 */
	for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
		cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);

	/* If we're releasing frames from aggregation or dqa queues then check
	 * if all the queues that we're releasing frames from, combined, have:
	 *  - more frames than the service period, in which case more_data
	 *    needs to be set
	 *  - fewer than 'cnt' frames, in which case we need to adjust the
	 *    firmware command (but do that unconditionally)
	 */
	if (single_sta_queue) {
		int remaining = cnt;
		int sleep_tx_count;

		spin_lock_bh(&mvmsta->lock);
		for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
			struct iwl_mvm_tid_data *tid_data;
			u16 n_queued;

			tid_data = &mvmsta->tid_data[tid];

			n_queued = iwl_mvm_tid_queued(mvm, tid_data);
			if (n_queued > remaining) {
				more_data = true;
				remaining = 0;
				break;
			}
			remaining -= n_queued;
		}
		sleep_tx_count = cnt - remaining;
		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
			mvmsta->sleep_tx_count = sleep_tx_count;
		spin_unlock_bh(&mvmsta->lock);

		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
		if (WARN_ON(cnt - remaining == 0)) {
			ieee80211_sta_eosp(sta);
			return;
		}
	}

	/* Note: this is ignored by firmware not supporting GO uAPSD */
	if (more_data)
		cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;

	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
		mvmsta->next_status_eosp = true;
		cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
	} else {
		cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
	}

	/* block the Tx queues until the FW updated the sleep Tx count */
	iwl_trans_block_txq_ptrs(mvm->trans, true);

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
				   CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
			   struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
	struct ieee80211_sta *sta;
	u32 sta_id = le32_to_cpu(notif->sta_id);

	if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
		return;

	rcu_read_lock();
	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
	if (!IS_ERR_OR_NULL(sta))
		ieee80211_sta_eosp(sta);
	rcu_read_unlock();
}

void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
				   struct iwl_mvm_sta *mvmsta, bool disable)
{
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = mvmsta->sta_id,
		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
	};
	int ret;

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta,
				      bool disable)
{
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);

	spin_lock_bh(&mvm_sta->lock);

	if (mvm_sta->disable_tx == disable) {
		spin_unlock_bh(&mvm_sta->lock);
		return;
	}

	mvm_sta->disable_tx = disable;

	/* Tell mac80211 to start/stop queuing tx for this station */
	ieee80211_sta_block_awake(mvm->hw, sta, disable);

	iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);

	spin_unlock_bh(&mvm_sta->lock);
}

static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
					      struct iwl_mvm_vif *mvmvif,
					      struct iwl_mvm_int_sta *sta,
					      bool disable)
{
	u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
	struct iwl_mvm_add_sta_cmd cmd = {
		.add_modify = STA_MODE_MODIFY,
		.sta_id = sta->sta_id,
		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
		.mac_id_n_color = cpu_to_le32(id),
	};
	int ret;

	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
}

void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
				       struct iwl_mvm_vif *mvmvif,
				       bool disable)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvm_sta;
	int i;

	lockdep_assert_held(&mvm->mutex);

	/* Block/unblock all the stations of the given mvmvif */
	for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvm_sta = iwl_mvm_sta_from_mac80211(sta);
		if (mvm_sta->mac_id_n_color !=
		    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
			continue;

		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
	}

	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
		return;

	/* Need to block/unblock also multicast station */
	if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
						  &mvmvif->mcast_sta, disable);

	/*
	 * Only unblock the broadcast station (FW blocks it for immediate
	 * quiet, not the driver)
	 */
	if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
						  &mvmvif->bcast_sta, disable);
}

void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvmsta;

	rcu_read_lock();

	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);

	if (!WARN_ON(!mvmsta))
		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);

	rcu_read_unlock();
}

u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
{
	u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);

	/*
	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
	 * to align the wrap around of ssn so we compare relevant values.
	 */
	if (mvm->trans->cfg->gen2)
		sn &= 0xff;

	return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
}