summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
blob: 6f2e2af23219a27f856b9bb0bd3ce7cf0647856d (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
/******************************************************************************
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
 * 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 <linux/ieee80211.h>
#include <linux/etherdevice.h>
#include <linux/tcp.h>
#include <net/ip.h>
#include <net/ipv6.h>

#include "iwl-trans.h"
#include "iwl-eeprom-parse.h"
#include "mvm.h"
#include "sta.h"

static void
iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
			  u16 tid, u16 ssn)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_ba *ba_trig;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
	ba_trig = (void *)trig->data;

	if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
		return;

	if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
		return;

	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
				"BAR sent to %pM, tid %d, ssn %d",
				addr, tid, ssn);
}

#define OPT_HDR(type, skb, off) \
	(type *)(skb_network_header(skb) + (off))

static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
			   struct ieee80211_hdr *hdr,
			   struct ieee80211_tx_info *info,
			   u16 offload_assist)
{
#if IS_ENABLED(CONFIG_INET)
	u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
	u8 protocol = 0;

	/*
	 * Do not compute checksum if already computed or if transport will
	 * compute it
	 */
	if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD)
		goto out;

	/* We do not expect to be requested to csum stuff we do not support */
	if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
		      (skb->protocol != htons(ETH_P_IP) &&
		       skb->protocol != htons(ETH_P_IPV6)),
		      "No support for requested checksum\n")) {
		skb_checksum_help(skb);
		goto out;
	}

	if (skb->protocol == htons(ETH_P_IP)) {
		protocol = ip_hdr(skb)->protocol;
	} else {
#if IS_ENABLED(CONFIG_IPV6)
		struct ipv6hdr *ipv6h =
			(struct ipv6hdr *)skb_network_header(skb);
		unsigned int off = sizeof(*ipv6h);

		protocol = ipv6h->nexthdr;
		while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
			struct ipv6_opt_hdr *hp;

			/* only supported extension headers */
			if (protocol != NEXTHDR_ROUTING &&
			    protocol != NEXTHDR_HOP &&
			    protocol != NEXTHDR_DEST) {
				skb_checksum_help(skb);
				goto out;
			}

			hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
			protocol = hp->nexthdr;
			off += ipv6_optlen(hp);
		}
		/* if we get here - protocol now should be TCP/UDP */
#endif
	}

	if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
		WARN_ON_ONCE(1);
		skb_checksum_help(skb);
		goto out;
	}

	/* enable L4 csum */
	offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);

	/*
	 * Set offset to IP header (snap).
	 * We don't support tunneling so no need to take care of inner header.
	 * Size is in words.
	 */
	offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);

	/* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
	if (skb->protocol == htons(ETH_P_IP) &&
	    (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
		ip_hdr(skb)->check = 0;
		offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
	}

	/* reset UDP/TCP header csum */
	if (protocol == IPPROTO_TCP)
		tcp_hdr(skb)->check = 0;
	else
		udp_hdr(skb)->check = 0;

	/*
	 * mac header len should include IV, size is in words unless
	 * the IV is added by the firmware like in WEP.
	 * In new Tx API, the IV is always added by the firmware.
	 */
	if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
		mh_len += info->control.hw_key->iv_len;
	mh_len /= 2;
	offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;

out:
#endif
	return offload_assist;
}

/*
 * Sets most of the Tx cmd's fields
 */
void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
			struct iwl_tx_cmd *tx_cmd,
			struct ieee80211_tx_info *info, u8 sta_id)
{
	struct ieee80211_hdr *hdr = (void *)skb->data;
	__le16 fc = hdr->frame_control;
	u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
	u32 len = skb->len + FCS_LEN;
	u16 offload_assist = 0;
	u8 ac;

	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
		tx_flags |= TX_CMD_FLG_ACK;
	else
		tx_flags &= ~TX_CMD_FLG_ACK;

	if (ieee80211_is_probe_resp(fc))
		tx_flags |= TX_CMD_FLG_TSF;

	if (ieee80211_has_morefrags(fc))
		tx_flags |= TX_CMD_FLG_MORE_FRAG;

	if (ieee80211_is_data_qos(fc)) {
		u8 *qc = ieee80211_get_qos_ctl(hdr);
		tx_cmd->tid_tspec = qc[0] & 0xf;
		tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
		if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
			offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
	} else if (ieee80211_is_back_req(fc)) {
		struct ieee80211_bar *bar = (void *)skb->data;
		u16 control = le16_to_cpu(bar->control);
		u16 ssn = le16_to_cpu(bar->start_seq_num);

		tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
		tx_cmd->tid_tspec = (control &
				     IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
			IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
		WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
		iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
					  ssn);
	} else {
		tx_cmd->tid_tspec = IWL_TID_NON_QOS;
		if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
			tx_flags |= TX_CMD_FLG_SEQ_CTL;
		else
			tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
	}

	/* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
	if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
		ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
	else
		ac = tid_to_mac80211_ac[0];

	tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
			TX_CMD_FLG_BT_PRIO_POS;

	if (ieee80211_is_mgmt(fc)) {
		if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
		else if (ieee80211_is_action(fc))
			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
		else
			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);

		/* The spec allows Action frames in A-MPDU, we don't support
		 * it
		 */
		WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
	} else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
	} else {
		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
	}

	if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
	    !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
		tx_flags |= TX_CMD_FLG_PROT_REQUIRE;

	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
	    ieee80211_action_contains_tpc(skb))
		tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;

	tx_cmd->tx_flags = cpu_to_le32(tx_flags);
	/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
	tx_cmd->len = cpu_to_le16((u16)skb->len);
	tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
	tx_cmd->sta_id = sta_id;

	/* padding is inserted later in transport */
	if (ieee80211_hdrlen(fc) % 4 &&
	    !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
		offload_assist |= BIT(TX_CMD_OFFLD_PAD);

	tx_cmd->offload_assist |=
		cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
					    offload_assist));
}

static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
			       struct ieee80211_tx_info *info,
			       struct ieee80211_sta *sta)
{
	int rate_idx;
	u8 rate_plcp;
	u32 rate_flags;

	/* HT rate doesn't make sense for a non data frame */
	WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
		  "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
		  info->control.rates[0].flags,
		  info->control.rates[0].idx);

	rate_idx = info->control.rates[0].idx;
	/* if the rate isn't a well known legacy rate, take the lowest one */
	if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
		rate_idx = rate_lowest_index(
				&mvm->nvm_data->bands[info->band], sta);

	/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
	if (info->band == NL80211_BAND_5GHZ)
		rate_idx += IWL_FIRST_OFDM_RATE;

	/* For 2.4 GHZ band, check that there is no need to remap */
	BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);

	/* Get PLCP rate for tx_cmd->rate_n_flags */
	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);

	if (info->band == NL80211_BAND_2GHZ &&
	    !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
		rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
	else
		rate_flags =
			BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;

	/* Set CCK flag as needed */
	if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
		rate_flags |= RATE_MCS_CCK_MSK;

	return (u32)rate_plcp | rate_flags;
}

/*
 * Sets the fields in the Tx cmd that are rate related
 */
void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
			    struct ieee80211_tx_info *info,
			    struct ieee80211_sta *sta, __le16 fc)
{
	/* Set retry limit on RTS packets */
	tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;

	/* Set retry limit on DATA packets and Probe Responses*/
	if (ieee80211_is_probe_resp(fc)) {
		tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
		tx_cmd->rts_retry_limit =
			min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
	} else if (ieee80211_is_back_req(fc)) {
		tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
	} else {
		tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
	}

	/*
	 * for data packets, rate info comes from the table inside the fw. This
	 * table is controlled by LINK_QUALITY commands
	 */

	if (ieee80211_is_data(fc) && sta) {
		tx_cmd->initial_rate_index = 0;
		tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
		return;
	} else if (ieee80211_is_back_req(fc)) {
		tx_cmd->tx_flags |=
			cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
	}

	mvm->mgmt_last_antenna_idx =
		iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
				     mvm->mgmt_last_antenna_idx);

	/* Set the rate in the TX cmd */
	tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));
}

static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
					 u8 *crypto_hdr)
{
	struct ieee80211_key_conf *keyconf = info->control.hw_key;
	u64 pn;

	pn = atomic64_inc_return(&keyconf->tx_pn);
	crypto_hdr[0] = pn;
	crypto_hdr[2] = 0;
	crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
	crypto_hdr[1] = pn >> 8;
	crypto_hdr[4] = pn >> 16;
	crypto_hdr[5] = pn >> 24;
	crypto_hdr[6] = pn >> 32;
	crypto_hdr[7] = pn >> 40;
}

/*
 * Sets the fields in the Tx cmd that are crypto related
 */
static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
				      struct ieee80211_tx_info *info,
				      struct iwl_tx_cmd *tx_cmd,
				      struct sk_buff *skb_frag,
				      int hdrlen)
{
	struct ieee80211_key_conf *keyconf = info->control.hw_key;
	u8 *crypto_hdr = skb_frag->data + hdrlen;
	u64 pn;

	switch (keyconf->cipher) {
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
		iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
		break;

	case WLAN_CIPHER_SUITE_TKIP:
		tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
		pn = atomic64_inc_return(&keyconf->tx_pn);
		ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
		ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
		break;

	case WLAN_CIPHER_SUITE_WEP104:
		tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
		/* fall through */
	case WLAN_CIPHER_SUITE_WEP40:
		tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
			((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
			  TX_CMD_SEC_WEP_KEY_IDX_MSK);

		memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
		break;
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
		/* TODO: Taking the key from the table might introduce a race
		 * when PTK rekeying is done, having an old packets with a PN
		 * based on the old key but the message encrypted with a new
		 * one.
		 * Need to handle this.
		 */
		tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE;
		tx_cmd->key[0] = keyconf->hw_key_idx;
		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
		break;
	default:
		tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
	}
}

/*
 * Allocates and sets the Tx cmd the driver data pointers in the skb
 */
static struct iwl_device_cmd *
iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
		      struct ieee80211_tx_info *info, int hdrlen,
		      struct ieee80211_sta *sta, u8 sta_id)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct iwl_device_cmd *dev_cmd;
	struct iwl_tx_cmd *tx_cmd;

	dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);

	if (unlikely(!dev_cmd))
		return NULL;

	/* Make sure we zero enough of dev_cmd */
	BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));

	memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
	dev_cmd->hdr.cmd = TX_CMD;

	if (iwl_mvm_has_new_tx_api(mvm)) {
		struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
		u16 offload_assist = 0;

		if (ieee80211_is_data_qos(hdr->frame_control)) {
			u8 *qc = ieee80211_get_qos_ctl(hdr);

			if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
				offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
		}

		offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
						 offload_assist);

		/* padding is inserted later in transport */
		if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
		    !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
			offload_assist |= BIT(TX_CMD_OFFLD_PAD);

		cmd->offload_assist |= cpu_to_le16(offload_assist);

		/* Total # bytes to be transmitted */
		cmd->len = cpu_to_le16((u16)skb->len);

		/* Copy MAC header from skb into command buffer */
		memcpy(cmd->hdr, hdr, hdrlen);

		if (!info->control.hw_key)
			cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS);

		/* For data packets rate info comes from the fw */
		if (ieee80211_is_data(hdr->frame_control) && sta)
			goto out;

		cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE);
		cmd->rate_n_flags =
			cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta));

		goto out;
	}

	tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;

	if (info->control.hw_key)
		iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);

	iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);

	iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);

	/* Copy MAC header from skb into command buffer */
	memcpy(tx_cmd->hdr, hdr, hdrlen);

out:
	return dev_cmd;
}

static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
				       struct iwl_device_cmd *cmd)
{
	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);

	memset(&skb_info->status, 0, sizeof(skb_info->status));
	memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));

	skb_info->driver_data[1] = cmd;
}

static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
				      struct ieee80211_tx_info *info, __le16 fc)
{
	struct iwl_mvm_vif *mvmvif;

	mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);

	switch (info->control.vif->type) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_ADHOC:
		/*
		 * Non-bufferable frames use the broadcast station, thus they
		 * use the probe queue.
		 * Also take care of the case where we send a deauth to a
		 * station that we don't have, or similarly an association
		 * response (with non-success status) for a station we can't
		 * accept.
		 * Also, disassociate frames might happen, particular with
		 * reason 7 ("Class 3 frame received from nonassociated STA").
		 */
		if (ieee80211_is_mgmt(fc) &&
		    (!ieee80211_is_bufferable_mmpdu(fc) ||
		     ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
			return mvm->probe_queue;
		if (info->hw_queue == info->control.vif->cab_queue)
			return mvmvif->cab_queue;

		WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
			  "fc=0x%02x", le16_to_cpu(fc));
		return mvm->probe_queue;
	case NL80211_IFTYPE_P2P_DEVICE:
		if (ieee80211_is_mgmt(fc))
			return mvm->p2p_dev_queue;
		if (info->hw_queue == info->control.vif->cab_queue)
			return mvmvif->cab_queue;

		WARN_ON_ONCE(1);
		return mvm->p2p_dev_queue;
	default:
		WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
		return -1;
	}
}

int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_info info;
	struct iwl_device_cmd *dev_cmd;
	u8 sta_id;
	int hdrlen = ieee80211_hdrlen(hdr->frame_control);
	int queue;

	/* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
	 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
	 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
	 * and hence needs to be sent on the aux queue
	 */
	if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
	    skb_info->control.vif->type == NL80211_IFTYPE_STATION)
		skb_info->hw_queue = mvm->aux_queue;

	memcpy(&info, skb->cb, sizeof(info));

	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
		return -1;

	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
			 (!info.control.vif ||
			  info.hw_queue != info.control.vif->cab_queue)))
		return -1;

	queue = info.hw_queue;

	/*
	 * If the interface on which the frame is sent is the P2P_DEVICE
	 * or an AP/GO interface use the broadcast station associated
	 * with it; otherwise if the interface is a managed interface
	 * use the AP station associated with it for multicast traffic
	 * (this is not possible for unicast packets as a TLDS discovery
	 * response are sent without a station entry); otherwise use the
	 * AUX station.
	 */
	sta_id = mvm->aux_sta.sta_id;
	if (info.control.vif) {
		struct iwl_mvm_vif *mvmvif =
			iwl_mvm_vif_from_mac80211(info.control.vif);

		if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
		    info.control.vif->type == NL80211_IFTYPE_AP ||
		    info.control.vif->type == NL80211_IFTYPE_ADHOC) {
			sta_id = mvmvif->bcast_sta.sta_id;
			queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
							   hdr->frame_control);
			if (queue < 0)
				return -1;
		} else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
			   is_multicast_ether_addr(hdr->addr1)) {
			u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);

			if (ap_sta_id != IWL_MVM_INVALID_STA)
				sta_id = ap_sta_id;
		} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
			queue = mvm->aux_queue;
		}
	}

	IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);

	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
	if (!dev_cmd)
		return -1;

	/* From now on, we cannot access info->control */
	iwl_mvm_skb_prepare_status(skb, dev_cmd);

	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
		return -1;
	}

	return 0;
}

#ifdef CONFIG_INET
static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
			  struct ieee80211_tx_info *info,
			  struct ieee80211_sta *sta,
			  struct sk_buff_head *mpdus_skb)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct ieee80211_hdr *hdr = (void *)skb->data;
	unsigned int mss = skb_shinfo(skb)->gso_size;
	struct sk_buff *tmp, *next;
	char cb[sizeof(skb->cb)];
	unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
	bool ipv4 = (skb->protocol == htons(ETH_P_IP));
	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
	u16 snap_ip_tcp, pad, i = 0;
	unsigned int dbg_max_amsdu_len;
	netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
	u8 *qc, tid, txf;

	snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
		tcp_hdrlen(skb);

	dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);

	if (!sta->max_amsdu_len ||
	    !ieee80211_is_data_qos(hdr->frame_control) ||
	    (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
		num_subframes = 1;
		pad = 0;
		goto segment;
	}

	qc = ieee80211_get_qos_ctl(hdr);
	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
		return -EINVAL;

	/*
	 * Do not build AMSDU for IPv6 with extension headers.
	 * ask stack to segment and checkum the generated MPDUs for us.
	 */
	if (skb->protocol == htons(ETH_P_IPV6) &&
	    ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
	    IPPROTO_TCP) {
		num_subframes = 1;
		pad = 0;
		netdev_features &= ~NETIF_F_CSUM_MASK;
		goto segment;
	}

	/*
	 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
	 * during an BA session.
	 */
	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
	    !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
		num_subframes = 1;
		pad = 0;
		goto segment;
	}

	max_amsdu_len = sta->max_amsdu_len;

	/* the Tx FIFO to which this A-MSDU will be routed */
	txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, tid_to_mac80211_ac[tid]);

	/*
	 * Don't send an AMSDU that will be longer than the TXF.
	 * Add a security margin of 256 for the TX command + headers.
	 * We also want to have the start of the next packet inside the
	 * fifo to be able to send bursts.
	 */
	max_amsdu_len = min_t(unsigned int, max_amsdu_len,
			      mvm->fwrt.smem_cfg.lmac[0].txfifo_size[txf] -
			      256);

	if (unlikely(dbg_max_amsdu_len))
		max_amsdu_len = min_t(unsigned int, max_amsdu_len,
				      dbg_max_amsdu_len);

	/*
	 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
	 * supported. This is a spec requirement (IEEE 802.11-2015
	 * section 8.7.3 NOTE 3).
	 */
	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
	    !sta->vht_cap.vht_supported)
		max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);

	/* Sub frame header + SNAP + IP header + TCP header + MSS */
	subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
	pad = (4 - subf_len) & 0x3;

	/*
	 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
	 * N * subf_len + (N - 1) * pad.
	 */
	num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
	if (num_subframes > 1)
		*qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;

	tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
		tcp_hdrlen(skb) + skb->data_len;

	/*
	 * Make sure we have enough TBs for the A-MSDU:
	 *	2 for each subframe
	 *	1 more for each fragment
	 *	1 more for the potential data in the header
	 */
	num_subframes =
		min_t(unsigned int, num_subframes,
		      (mvm->trans->max_skb_frags - 1 -
		       skb_shinfo(skb)->nr_frags) / 2);

	/* This skb fits in one single A-MSDU */
	if (num_subframes * mss >= tcp_payload_len) {
		__skb_queue_tail(mpdus_skb, skb);
		return 0;
	}

	/*
	 * Trick the segmentation function to make it
	 * create SKBs that can fit into one A-MSDU.
	 */
segment:
	skb_shinfo(skb)->gso_size = num_subframes * mss;
	memcpy(cb, skb->cb, sizeof(cb));

	next = skb_gso_segment(skb, netdev_features);
	skb_shinfo(skb)->gso_size = mss;
	if (WARN_ON_ONCE(IS_ERR(next)))
		return -EINVAL;
	else if (next)
		consume_skb(skb);

	while (next) {
		tmp = next;
		next = tmp->next;

		memcpy(tmp->cb, cb, sizeof(tmp->cb));
		/*
		 * Compute the length of all the data added for the A-MSDU.
		 * This will be used to compute the length to write in the TX
		 * command. We have: SNAP + IP + TCP for n -1 subframes and
		 * ETH header for n subframes.
		 */
		tcp_payload_len = skb_tail_pointer(tmp) -
			skb_transport_header(tmp) -
			tcp_hdrlen(tmp) + tmp->data_len;

		if (ipv4)
			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);

		if (tcp_payload_len > mss) {
			skb_shinfo(tmp)->gso_size = mss;
		} else {
			if (ieee80211_is_data_qos(hdr->frame_control)) {
				qc = ieee80211_get_qos_ctl((void *)tmp->data);

				if (ipv4)
					ip_send_check(ip_hdr(tmp));
				*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
			}
			skb_shinfo(tmp)->gso_size = 0;
		}

		tmp->prev = NULL;
		tmp->next = NULL;

		__skb_queue_tail(mpdus_skb, tmp);
		i++;
	}

	return 0;
}
#else /* CONFIG_INET */
static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
			  struct ieee80211_tx_info *info,
			  struct ieee80211_sta *sta,
			  struct sk_buff_head *mpdus_skb)
{
	/* Impossible to get TSO with CONFIG_INET */
	WARN_ON(1);

	return -1;
}
#endif

static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
				  struct iwl_mvm_sta *mvm_sta, u8 tid,
				  struct sk_buff *skb)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	u8 mac_queue = info->hw_queue;
	struct sk_buff_head *deferred_tx_frames;

	lockdep_assert_held(&mvm_sta->lock);

	mvm_sta->deferred_traffic_tid_map |= BIT(tid);
	set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);

	deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;

	skb_queue_tail(deferred_tx_frames, skb);

	/*
	 * The first deferred frame should've stopped the MAC queues, so we
	 * should never get a second deferred frame for the RA/TID.
	 */
	if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
		  "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
		  skb_queue_len(deferred_tx_frames))) {
		iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
		schedule_work(&mvm->add_stream_wk);
	}
}

/* Check if there are any timed-out TIDs on a given shared TXQ */
static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
{
	unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
	unsigned long now = jiffies;
	int tid;

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

	for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
		if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
				IWL_MVM_DQA_QUEUE_TIMEOUT, now))
			return true;
	}

	return false;
}

/*
 * Sets the fields in the Tx cmd that are crypto related
 */
static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
			   struct ieee80211_tx_info *info,
			   struct ieee80211_sta *sta)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct iwl_mvm_sta *mvmsta;
	struct iwl_device_cmd *dev_cmd;
	__le16 fc;
	u16 seq_number = 0;
	u8 tid = IWL_MAX_TID_COUNT;
	u16 txq_id = info->hw_queue;
	bool is_ampdu = false;
	int hdrlen;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	fc = hdr->frame_control;
	hdrlen = ieee80211_hdrlen(fc);

	if (WARN_ON_ONCE(!mvmsta))
		return -1;

	if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
		return -1;

	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
					sta, mvmsta->sta_id);
	if (!dev_cmd)
		goto drop;

	/*
	 * we handle that entirely ourselves -- for uAPSD the firmware
	 * will always send a notification, and for PS-Poll responses
	 * we'll notify mac80211 when getting frame status
	 */
	info->flags &= ~IEEE80211_TX_STATUS_EOSP;

	spin_lock(&mvmsta->lock);

	/* nullfunc frames should go to the MGMT queue regardless of QOS,
	 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
	 * assignment of MGMT TID
	 */
	if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
		u8 *qc = NULL;
		qc = ieee80211_get_qos_ctl(hdr);
		tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
		if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
			goto drop_unlock_sta;

		is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
		if (WARN_ON_ONCE(is_ampdu &&
				 mvmsta->tid_data[tid].state != IWL_AGG_ON))
			goto drop_unlock_sta;

		seq_number = mvmsta->tid_data[tid].seq_number;
		seq_number &= IEEE80211_SCTL_SEQ;

		if (!iwl_mvm_has_new_tx_api(mvm)) {
			struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;

			hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
			hdr->seq_ctrl |= cpu_to_le16(seq_number);
			/* update the tx_cmd hdr as it was already copied */
			tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
		}
	}

	txq_id = mvmsta->tid_data[tid].txq_id;

	WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);

	/* Check if TXQ needs to be allocated or re-activated */
	if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE ||
		     !mvmsta->tid_data[tid].is_tid_active)) {
		/* If TXQ needs to be allocated... */
		if (txq_id == IWL_MVM_INVALID_QUEUE) {
			iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);

			/*
			 * The frame is now deferred, and the worker scheduled
			 * will re-allocate it, so we can free it for now.
			 */
			iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
			spin_unlock(&mvmsta->lock);
			return 0;
		}

		/* queue should always be active in new TX path */
		WARN_ON(iwl_mvm_has_new_tx_api(mvm));

		/* If we are here - TXQ exists and needs to be re-activated */
		spin_lock(&mvm->queue_info_lock);
		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
		mvmsta->tid_data[tid].is_tid_active = true;
		spin_unlock(&mvm->queue_info_lock);

		IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
				    txq_id);
	}

	if (!iwl_mvm_has_new_tx_api(mvm)) {
		/* Keep track of the time of the last frame for this RA/TID */
		mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;

		/*
		 * If we have timed-out TIDs - schedule the worker that will
		 * reconfig the queues and update them
		 *
		 * Note that the mvm->queue_info_lock isn't being taken here in
		 * order to not serialize the TX flow. This isn't dangerous
		 * because scheduling mvm->add_stream_wk can't ruin the state,
		 * and if we DON'T schedule it due to some race condition then
		 * next TX we get here we will.
		 */
		if (unlikely(mvm->queue_info[txq_id].status ==
			     IWL_MVM_QUEUE_SHARED &&
			     iwl_mvm_txq_should_update(mvm, txq_id)))
			schedule_work(&mvm->add_stream_wk);
	}

	IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
		     tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));

	/* From now on, we cannot access info->control */
	iwl_mvm_skb_prepare_status(skb, dev_cmd);

	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
		goto drop_unlock_sta;

	if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
		mvmsta->tid_data[tid].seq_number = seq_number + 0x10;

	spin_unlock(&mvmsta->lock);

	return 0;

drop_unlock_sta:
	iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
	spin_unlock(&mvmsta->lock);
drop:
	return -1;
}

int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
		   struct ieee80211_sta *sta)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct ieee80211_tx_info info;
	struct sk_buff_head mpdus_skbs;
	unsigned int payload_len;
	int ret;

	if (WARN_ON_ONCE(!mvmsta))
		return -1;

	if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
		return -1;

	memcpy(&info, skb->cb, sizeof(info));

	if (!skb_is_gso(skb))
		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);

	payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
		tcp_hdrlen(skb) + skb->data_len;

	if (payload_len <= skb_shinfo(skb)->gso_size)
		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);

	__skb_queue_head_init(&mpdus_skbs);

	ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
	if (ret)
		return ret;

	if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
		return ret;

	while (!skb_queue_empty(&mpdus_skbs)) {
		skb = __skb_dequeue(&mpdus_skbs);

		ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
		if (ret) {
			__skb_queue_purge(&mpdus_skbs);
			return ret;
		}
	}

	return 0;
}

static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
				      struct ieee80211_sta *sta, u8 tid)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
	struct ieee80211_vif *vif = mvmsta->vif;
	u16 normalized_ssn;

	lockdep_assert_held(&mvmsta->lock);

	if ((tid_data->state == IWL_AGG_ON ||
	     tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
	    iwl_mvm_tid_queued(mvm, tid_data) == 0) {
		/*
		 * Now that this aggregation or DQA queue is empty tell
		 * mac80211 so it knows we no longer have frames buffered for
		 * the station on this TID (for the TIM bitmap calculation.)
		 */
		ieee80211_sta_set_buffered(sta, tid, false);
	}

	/*
	 * In A000 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)
		return;

	switch (tid_data->state) {
	case IWL_EMPTYING_HW_QUEUE_ADDBA:
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Can continue addBA flow ssn = next_recl = %d\n",
				    tid_data->next_reclaimed);
		tid_data->state = IWL_AGG_STARTING;
		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;

	case IWL_EMPTYING_HW_QUEUE_DELBA:
		IWL_DEBUG_TX_QUEUES(mvm,
				    "Can continue DELBA flow ssn = next_recl = %d\n",
				    tid_data->next_reclaimed);
		tid_data->state = IWL_AGG_OFF;
		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
		break;

	default:
		break;
	}
}

#ifdef CONFIG_IWLWIFI_DEBUG
const char *iwl_mvm_get_tx_fail_reason(u32 status)
{
#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x

	switch (status & TX_STATUS_MSK) {
	case TX_STATUS_SUCCESS:
		return "SUCCESS";
	TX_STATUS_POSTPONE(DELAY);
	TX_STATUS_POSTPONE(FEW_BYTES);
	TX_STATUS_POSTPONE(BT_PRIO);
	TX_STATUS_POSTPONE(QUIET_PERIOD);
	TX_STATUS_POSTPONE(CALC_TTAK);
	TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
	TX_STATUS_FAIL(SHORT_LIMIT);
	TX_STATUS_FAIL(LONG_LIMIT);
	TX_STATUS_FAIL(UNDERRUN);
	TX_STATUS_FAIL(DRAIN_FLOW);
	TX_STATUS_FAIL(RFKILL_FLUSH);
	TX_STATUS_FAIL(LIFE_EXPIRE);
	TX_STATUS_FAIL(DEST_PS);
	TX_STATUS_FAIL(HOST_ABORTED);
	TX_STATUS_FAIL(BT_RETRY);
	TX_STATUS_FAIL(STA_INVALID);
	TX_STATUS_FAIL(FRAG_DROPPED);
	TX_STATUS_FAIL(TID_DISABLE);
	TX_STATUS_FAIL(FIFO_FLUSHED);
	TX_STATUS_FAIL(SMALL_CF_POLL);
	TX_STATUS_FAIL(FW_DROP);
	TX_STATUS_FAIL(STA_COLOR_MISMATCH);
	}

	return "UNKNOWN";

#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CONFIG_IWLWIFI_DEBUG */

void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
			       enum nl80211_band band,
			       struct ieee80211_tx_rate *r)
{
	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
	case RATE_MCS_CHAN_WIDTH_20:
		break;
	case RATE_MCS_CHAN_WIDTH_40:
		r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
		break;
	case RATE_MCS_CHAN_WIDTH_80:
		r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
		break;
	case RATE_MCS_CHAN_WIDTH_160:
		r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
		break;
	}
	if (rate_n_flags & RATE_MCS_SGI_MSK)
		r->flags |= IEEE80211_TX_RC_SHORT_GI;
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		r->flags |= IEEE80211_TX_RC_MCS;
		r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
	} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
		ieee80211_rate_set_vht(
			r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
			((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
						RATE_VHT_MCS_NSS_POS) + 1);
		r->flags |= IEEE80211_TX_RC_VHT_MCS;
	} else {
		r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
							     band);
	}
}

/**
 * translate ucode response to mac80211 tx status control values
 */
static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
					struct ieee80211_tx_info *info)
{
	struct ieee80211_tx_rate *r = &info->status.rates[0];

	info->status.antenna =
		((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
	iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
}

static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
					    u32 status)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_tx_status *status_trig;
	int i;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
	status_trig = (void *)trig->data;

	if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, NULL, trig))
		return;

	for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
		/* don't collect on status 0 */
		if (!status_trig->statuses[i].status)
			break;

		if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
			continue;

		iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
					"Tx status %d was received",
					status & TX_STATUS_MSK);
		break;
	}
}

/**
 * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
 * @tx_resp: the Tx response from the fw (agg or non-agg)
 *
 * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
 * it can't know that everything will go well until the end of the AMPDU, it
 * can't know in advance the number of MPDUs that will be sent in the current
 * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
 * Hence, it can't know in advance what the SSN of the SCD will be at the end
 * of the batch. This is why the SSN of the SCD is written at the end of the
 * whole struct at a variable offset. This function knows how to cope with the
 * variable offset and returns the SSN of the SCD.
 */
static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
				      struct iwl_mvm_tx_resp *tx_resp)
{
	return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
			    tx_resp->frame_count) & 0xfff;
}

static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
				     struct iwl_rx_packet *pkt)
{
	struct ieee80211_sta *sta;
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	/* struct iwl_mvm_tx_resp_v3 is almost the same */
	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
	struct agg_tx_status *agg_status =
		iwl_mvm_get_agg_status(mvm, tx_resp);
	u32 status = le16_to_cpu(agg_status->status);
	u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
	struct iwl_mvm_sta *mvmsta;
	struct sk_buff_head skbs;
	u8 skb_freed = 0;
	u8 lq_color;
	u16 next_reclaimed, seq_ctl;
	bool is_ndp = false;

	__skb_queue_head_init(&skbs);

	if (iwl_mvm_has_new_tx_api(mvm))
		txq_id = le16_to_cpu(tx_resp->tx_queue);

	seq_ctl = le16_to_cpu(tx_resp->seq_ctl);

	/* we can free until ssn % q.n_bd not inclusive */
	iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);

	while (!skb_queue_empty(&skbs)) {
		struct sk_buff *skb = __skb_dequeue(&skbs);
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
		bool flushed = false;

		skb_freed++;

		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);

		memset(&info->status, 0, sizeof(info->status));

		/* inform mac80211 about what happened with the frame */
		switch (status & TX_STATUS_MSK) {
		case TX_STATUS_SUCCESS:
		case TX_STATUS_DIRECT_DONE:
			info->flags |= IEEE80211_TX_STAT_ACK;
			break;
		case TX_STATUS_FAIL_FIFO_FLUSHED:
		case TX_STATUS_FAIL_DRAIN_FLOW:
			flushed = true;
			break;
		case TX_STATUS_FAIL_DEST_PS:
			/* the FW should have stopped the queue and not
			 * return this status
			 */
			WARN_ON(1);
			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
			break;
		default:
			break;
		}

		iwl_mvm_tx_status_check_trigger(mvm, status);

		info->status.rates[0].count = tx_resp->failure_frame + 1;
		iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
					    info);
		info->status.status_driver_data[1] =
			(void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);

		/* Single frame failure in an AMPDU queue => send BAR */
		if (info->flags & IEEE80211_TX_CTL_AMPDU &&
		    !(info->flags & IEEE80211_TX_STAT_ACK) &&
		    !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
		info->flags &= ~IEEE80211_TX_CTL_AMPDU;

		/* W/A FW bug: seq_ctl is wrong when the status isn't success */
		if (status != TX_STATUS_SUCCESS) {
			struct ieee80211_hdr *hdr = (void *)skb->data;
			seq_ctl = le16_to_cpu(hdr->seq_ctrl);
		}

		if (unlikely(!seq_ctl)) {
			struct ieee80211_hdr *hdr = (void *)skb->data;

			/*
			 * If it is an NDP, we can't update next_reclaim since
			 * its sequence control is 0. Note that for that same
			 * reason, NDPs are never sent to A-MPDU'able queues
			 * so that we can never have more than one freed frame
			 * for a single Tx resonse (see WARN_ON below).
			 */
			if (ieee80211_is_qos_nullfunc(hdr->frame_control))
				is_ndp = true;
		}

		/*
		 * TODO: this is not accurate if we are freeing more than one
		 * packet.
		 */
		info->status.tx_time =
			le16_to_cpu(tx_resp->wireless_media_time);
		BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
		lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
		info->status.status_driver_data[0] =
			RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);

		ieee80211_tx_status(mvm->hw, skb);
	}

	/* This is an aggregation queue or might become one, so we use
	 * the ssn since: ssn = wifi seq_num % 256.
	 * The seq_ctl is the sequence control of the packet to which
	 * this Tx response relates. But if there is a hole in the
	 * bitmap of the BA we received, this Tx response may allow to
	 * reclaim the hole and all the subsequent packets that were
	 * already acked. In that case, seq_ctl != ssn, and the next
	 * packet to be reclaimed will be ssn and not seq_ctl. In that
	 * case, several packets will be reclaimed even if
	 * frame_count = 1.
	 *
	 * The ssn is the index (% 256) of the latest packet that has
	 * treated (acked / dropped) + 1.
	 */
	next_reclaimed = ssn;

	IWL_DEBUG_TX_REPLY(mvm,
			   "TXQ %d status %s (0x%08x)\n",
			   txq_id, iwl_mvm_get_tx_fail_reason(status), status);

	IWL_DEBUG_TX_REPLY(mvm,
			   "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
			   le32_to_cpu(tx_resp->initial_rate),
			   tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
			   ssn, next_reclaimed, seq_ctl);

	rcu_read_lock();

	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
	/*
	 * sta can't be NULL otherwise it'd mean that the sta has been freed in
	 * the firmware while we still have packets for it in the Tx queues.
	 */
	if (WARN_ON_ONCE(!sta))
		goto out;

	if (!IS_ERR(sta)) {
		mvmsta = iwl_mvm_sta_from_mac80211(sta);

		if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) {
			struct iwl_mvm_tid_data *tid_data =
				&mvmsta->tid_data[tid];
			bool send_eosp_ndp = false;

			spin_lock_bh(&mvmsta->lock);

			if (!is_ndp) {
				tid_data->next_reclaimed = next_reclaimed;
				IWL_DEBUG_TX_REPLY(mvm,
						   "Next reclaimed packet:%d\n",
						   next_reclaimed);
			} else {
				IWL_DEBUG_TX_REPLY(mvm,
						   "NDP - don't update next_reclaimed\n");
			}

			iwl_mvm_check_ratid_empty(mvm, sta, tid);

			if (mvmsta->sleep_tx_count) {
				mvmsta->sleep_tx_count--;
				if (mvmsta->sleep_tx_count &&
				    !iwl_mvm_tid_queued(mvm, tid_data)) {
					/*
					 * The number of frames in the queue
					 * dropped to 0 even if we sent less
					 * frames than we thought we had on the
					 * Tx queue.
					 * This means we had holes in the BA
					 * window that we just filled, ask
					 * mac80211 to send EOSP since the
					 * firmware won't know how to do that.
					 * Send NDP and the firmware will send
					 * EOSP notification that will trigger
					 * a call to ieee80211_sta_eosp().
					 */
					send_eosp_ndp = true;
				}
			}

			spin_unlock_bh(&mvmsta->lock);
			if (send_eosp_ndp) {
				iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
					IEEE80211_FRAME_RELEASE_UAPSD,
					1, tid, false, false);
				mvmsta->sleep_tx_count = 0;
				ieee80211_send_eosp_nullfunc(sta, tid);
			}
		}

		if (mvmsta->next_status_eosp) {
			mvmsta->next_status_eosp = false;
			ieee80211_sta_eosp(sta);
		}
	} else {
		mvmsta = NULL;
	}

out:
	rcu_read_unlock();
}

#ifdef CONFIG_IWLWIFI_DEBUG
#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
static const char *iwl_get_agg_tx_status(u16 status)
{
	switch (status & AGG_TX_STATE_STATUS_MSK) {
	AGG_TX_STATE_(TRANSMITTED);
	AGG_TX_STATE_(UNDERRUN);
	AGG_TX_STATE_(BT_PRIO);
	AGG_TX_STATE_(FEW_BYTES);
	AGG_TX_STATE_(ABORT);
	AGG_TX_STATE_(TX_ON_AIR_DROP);
	AGG_TX_STATE_(LAST_SENT_TRY_CNT);
	AGG_TX_STATE_(LAST_SENT_BT_KILL);
	AGG_TX_STATE_(SCD_QUERY);
	AGG_TX_STATE_(TEST_BAD_CRC32);
	AGG_TX_STATE_(RESPONSE);
	AGG_TX_STATE_(DUMP_TX);
	AGG_TX_STATE_(DELAY_TX);
	}

	return "UNKNOWN";
}

static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
				      struct iwl_rx_packet *pkt)
{
	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
	struct agg_tx_status *frame_status =
		iwl_mvm_get_agg_status(mvm, tx_resp);
	int i;

	for (i = 0; i < tx_resp->frame_count; i++) {
		u16 fstatus = le16_to_cpu(frame_status[i].status);

		IWL_DEBUG_TX_REPLY(mvm,
				   "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
				   iwl_get_agg_tx_status(fstatus),
				   fstatus & AGG_TX_STATE_STATUS_MSK,
				   (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
					AGG_TX_STATE_TRY_CNT_POS,
				   le16_to_cpu(frame_status[i].sequence));
	}
}
#else
static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
				      struct iwl_rx_packet *pkt)
{}
#endif /* CONFIG_IWLWIFI_DEBUG */

static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
				  struct iwl_rx_packet *pkt)
{
	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	struct iwl_mvm_sta *mvmsta;
	int queue = SEQ_TO_QUEUE(sequence);

	if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
			 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
		return;

	if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
		return;

	iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);

	rcu_read_lock();

	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);

	if (!WARN_ON_ONCE(!mvmsta)) {
		mvmsta->tid_data[tid].rate_n_flags =
			le32_to_cpu(tx_resp->initial_rate);
		mvmsta->tid_data[tid].tx_time =
			le16_to_cpu(tx_resp->wireless_media_time);
		mvmsta->tid_data[tid].lq_color =
			(tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >>
			TX_RES_RATE_TABLE_COLOR_POS;
	}

	rcu_read_unlock();
}

void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;

	if (tx_resp->frame_count == 1)
		iwl_mvm_rx_tx_cmd_single(mvm, pkt);
	else
		iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
}

static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
			       int txq, int index,
			       struct ieee80211_tx_info *ba_info, u32 rate)
{
	struct sk_buff_head reclaimed_skbs;
	struct iwl_mvm_tid_data *tid_data;
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	struct sk_buff *skb;
	int freed;

	if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
		      tid >= IWL_MAX_TID_COUNT,
		      "sta_id %d tid %d", sta_id, tid))
		return;

	rcu_read_lock();

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

	/* Reclaiming frames for a station that has been deleted ? */
	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
		rcu_read_unlock();
		return;
	}

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	tid_data = &mvmsta->tid_data[tid];

	if (tid_data->txq_id != txq) {
		IWL_ERR(mvm,
			"invalid BA notification: Q %d, tid %d\n",
			tid_data->txq_id, tid);
		rcu_read_unlock();
		return;
	}

	spin_lock_bh(&mvmsta->lock);

	__skb_queue_head_init(&reclaimed_skbs);

	/*
	 * Release all TFDs before the SSN, i.e. all TFDs in front of
	 * block-ack window (we assume that they've been successfully
	 * transmitted ... if not, it's too late anyway).
	 */
	iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);

	tid_data->next_reclaimed = index;

	iwl_mvm_check_ratid_empty(mvm, sta, tid);

	freed = 0;

	/* pack lq color from tid_data along the reduced txp */
	ba_info->status.status_driver_data[0] =
		RS_DRV_DATA_PACK(tid_data->lq_color,
				 ba_info->status.status_driver_data[0]);
	ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;

	skb_queue_walk(&reclaimed_skbs, skb) {
		struct ieee80211_hdr *hdr = (void *)skb->data;
		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);

		if (ieee80211_is_data_qos(hdr->frame_control))
			freed++;
		else
			WARN_ON_ONCE(1);

		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);

		memset(&info->status, 0, sizeof(info->status));
		/* Packet was transmitted successfully, failures come as single
		 * frames because before failing a frame the firmware transmits
		 * it without aggregation at least once.
		 */
		info->flags |= IEEE80211_TX_STAT_ACK;

		/* this is the first skb we deliver in this batch */
		/* put the rate scaling data there */
		if (freed == 1) {
			info->flags |= IEEE80211_TX_STAT_AMPDU;
			memcpy(&info->status, &ba_info->status,
			       sizeof(ba_info->status));
			iwl_mvm_hwrate_to_tx_status(rate, info);
		}
	}

	spin_unlock_bh(&mvmsta->lock);

	/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
	 * possible (i.e. first MPDU in the aggregation wasn't acked)
	 * Still it's important to update RS about sent vs. acked.
	 */
	if (skb_queue_empty(&reclaimed_skbs)) {
		struct ieee80211_chanctx_conf *chanctx_conf = NULL;

		if (mvmsta->vif)
			chanctx_conf =
				rcu_dereference(mvmsta->vif->chanctx_conf);

		if (WARN_ON_ONCE(!chanctx_conf))
			goto out;

		ba_info->band = chanctx_conf->def.chan->band;
		iwl_mvm_hwrate_to_tx_status(rate, ba_info);

		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
		iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
	}

out:
	rcu_read_unlock();

	while (!skb_queue_empty(&reclaimed_skbs)) {
		skb = __skb_dequeue(&reclaimed_skbs);
		ieee80211_tx_status(mvm->hw, skb);
	}
}

void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	int sta_id, tid, txq, index;
	struct ieee80211_tx_info ba_info = {};
	struct iwl_mvm_ba_notif *ba_notif;
	struct iwl_mvm_tid_data *tid_data;
	struct iwl_mvm_sta *mvmsta;

	ba_info.flags = IEEE80211_TX_STAT_AMPDU;

	if (iwl_mvm_has_new_tx_api(mvm)) {
		struct iwl_mvm_compressed_ba_notif *ba_res =
			(void *)pkt->data;
		int i;

		sta_id = ba_res->sta_id;
		ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
		ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
		ba_info.status.tx_time =
			(u16)le32_to_cpu(ba_res->wireless_time);
		ba_info.status.status_driver_data[0] =
			(void *)(uintptr_t)ba_res->reduced_txp;

		if (!le16_to_cpu(ba_res->tfd_cnt))
			goto out;

		/* Free per TID */
		for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
			struct iwl_mvm_compressed_ba_tfd *ba_tfd =
				&ba_res->tfd[i];

			iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid,
					   (int)(le16_to_cpu(ba_tfd->q_num)),
					   le16_to_cpu(ba_tfd->tfd_index),
					   &ba_info,
					   le32_to_cpu(ba_res->tx_rate));
		}

out:
		IWL_DEBUG_TX_REPLY(mvm,
				   "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
				   sta_id, le32_to_cpu(ba_res->flags),
				   le16_to_cpu(ba_res->txed),
				   le16_to_cpu(ba_res->done));
		return;
	}

	ba_notif = (void *)pkt->data;
	sta_id = ba_notif->sta_id;
	tid = ba_notif->tid;
	/* "flow" corresponds to Tx queue */
	txq = le16_to_cpu(ba_notif->scd_flow);
	/* "ssn" is start of block-ack Tx window, corresponds to index
	 * (in Tx queue's circular buffer) of first TFD/frame in window */
	index = le16_to_cpu(ba_notif->scd_ssn);

	rcu_read_lock();
	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
	if (WARN_ON_ONCE(!mvmsta)) {
		rcu_read_unlock();
		return;
	}

	tid_data = &mvmsta->tid_data[tid];

	ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
	ba_info.status.ampdu_len = ba_notif->txed;
	ba_info.status.tx_time = tid_data->tx_time;
	ba_info.status.status_driver_data[0] =
		(void *)(uintptr_t)ba_notif->reduced_txp;

	rcu_read_unlock();

	iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
			   tid_data->rate_n_flags);

	IWL_DEBUG_TX_REPLY(mvm,
			   "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
			   ba_notif->sta_addr, ba_notif->sta_id);

	IWL_DEBUG_TX_REPLY(mvm,
			   "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
			   ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
			   le64_to_cpu(ba_notif->bitmap), txq, index,
			   ba_notif->txed, ba_notif->txed_2_done);

	IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
			   ba_notif->reduced_txp);
}

/*
 * Note that there are transports that buffer frames before they reach
 * the firmware. This means that after flush_tx_path is called, the
 * queue might not be empty. The race-free way to handle this is to:
 * 1) set the station as draining
 * 2) flush the Tx path
 * 3) wait for the transport queues to be empty
 */
int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
{
	int ret;
	struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
		.queues_ctl = cpu_to_le32(tfd_msk),
		.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
	};

	WARN_ON(iwl_mvm_has_new_tx_api(mvm));

	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
				   sizeof(flush_cmd), &flush_cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
	return ret;
}

int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id,
			   u16 tids, u32 flags)
{
	int ret;
	struct iwl_tx_path_flush_cmd flush_cmd = {
		.sta_id = cpu_to_le32(sta_id),
		.tid_mask = cpu_to_le16(tids),
	};

	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));

	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
				   sizeof(flush_cmd), &flush_cmd);
	if (ret)
		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
	return ret;
}

int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags)
{
	struct iwl_mvm_int_sta *int_sta = sta;
	struct iwl_mvm_sta *mvm_sta = sta;

	if (iwl_mvm_has_new_tx_api(mvm)) {
		if (internal)
			return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id,
						      BIT(IWL_MGMT_TID), flags);

		return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id,
					      0xFF, flags);
	}

	if (internal)
		return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk,
					     flags);

	return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
}