summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/rt2x00/rt2x00queue.c
blob: 29edb9fbe6f172298285f6269db5b51d1c541576 (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
/*
	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	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.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00lib
	Abstract: rt2x00 queue specific routines.
 */

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>

#include "rt2x00.h"
#include "rt2x00lib.h"

struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct sk_buff *skb;
	struct skb_frame_desc *skbdesc;
	unsigned int frame_size;
	unsigned int head_size = 0;
	unsigned int tail_size = 0;

	/*
	 * The frame size includes descriptor size, because the
	 * hardware directly receive the frame into the skbuffer.
	 */
	frame_size = entry->queue->data_size + entry->queue->desc_size;

	/*
	 * The payload should be aligned to a 4-byte boundary,
	 * this means we need at least 3 bytes for moving the frame
	 * into the correct offset.
	 */
	head_size = 4;

	/*
	 * For IV/EIV/ICV assembly we must make sure there is
	 * at least 8 bytes bytes available in headroom for IV/EIV
	 * and 8 bytes for ICV data as tailroon.
	 */
	if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags)) {
		head_size += 8;
		tail_size += 8;
	}

	/*
	 * Allocate skbuffer.
	 */
	skb = dev_alloc_skb(frame_size + head_size + tail_size);
	if (!skb)
		return NULL;

	/*
	 * Make sure we not have a frame with the requested bytes
	 * available in the head and tail.
	 */
	skb_reserve(skb, head_size);
	skb_put(skb, frame_size);

	/*
	 * Populate skbdesc.
	 */
	skbdesc = get_skb_frame_desc(skb);
	memset(skbdesc, 0, sizeof(*skbdesc));
	skbdesc->entry = entry;

	if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags)) {
		skbdesc->skb_dma = dma_map_single(rt2x00dev->dev,
						  skb->data,
						  skb->len,
						  DMA_FROM_DEVICE);
		skbdesc->flags |= SKBDESC_DMA_MAPPED_RX;
	}

	return skb;
}

void rt2x00queue_map_txskb(struct queue_entry *entry)
{
	struct device *dev = entry->queue->rt2x00dev->dev;
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);

	skbdesc->skb_dma =
	    dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE);
	skbdesc->flags |= SKBDESC_DMA_MAPPED_TX;
}
EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb);

void rt2x00queue_unmap_skb(struct queue_entry *entry)
{
	struct device *dev = entry->queue->rt2x00dev->dev;
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);

	if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) {
		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
				 DMA_FROM_DEVICE);
		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX;
	} else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) {
		dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len,
				 DMA_TO_DEVICE);
		skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX;
	}
}
EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb);

void rt2x00queue_free_skb(struct queue_entry *entry)
{
	if (!entry->skb)
		return;

	rt2x00queue_unmap_skb(entry);
	dev_kfree_skb_any(entry->skb);
	entry->skb = NULL;
}

void rt2x00queue_align_frame(struct sk_buff *skb)
{
	unsigned int frame_length = skb->len;
	unsigned int align = ALIGN_SIZE(skb, 0);

	if (!align)
		return;

	skb_push(skb, align);
	memmove(skb->data, skb->data + align, frame_length);
	skb_trim(skb, frame_length);
}

void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length)
{
	unsigned int payload_length = skb->len - header_length;
	unsigned int header_align = ALIGN_SIZE(skb, 0);
	unsigned int payload_align = ALIGN_SIZE(skb, header_length);
	unsigned int l2pad = payload_length ? L2PAD_SIZE(header_length) : 0;

	/*
	 * Adjust the header alignment if the payload needs to be moved more
	 * than the header.
	 */
	if (payload_align > header_align)
		header_align += 4;

	/* There is nothing to do if no alignment is needed */
	if (!header_align)
		return;

	/* Reserve the amount of space needed in front of the frame */
	skb_push(skb, header_align);

	/*
	 * Move the header.
	 */
	memmove(skb->data, skb->data + header_align, header_length);

	/* Move the payload, if present and if required */
	if (payload_length && payload_align)
		memmove(skb->data + header_length + l2pad,
			skb->data + header_length + l2pad + payload_align,
			payload_length);

	/* Trim the skb to the correct size */
	skb_trim(skb, header_length + l2pad + payload_length);
}

void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length)
{
	/*
	 * L2 padding is only present if the skb contains more than just the
	 * IEEE 802.11 header.
	 */
	unsigned int l2pad = (skb->len > header_length) ?
				L2PAD_SIZE(header_length) : 0;

	if (!l2pad)
		return;

	memmove(skb->data + l2pad, skb->data, header_length);
	skb_pull(skb, l2pad);
}

static void rt2x00queue_create_tx_descriptor_seq(struct rt2x00_dev *rt2x00dev,
						 struct sk_buff *skb,
						 struct txentry_desc *txdesc)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif);

	if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ))
		return;

	__set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags);

	if (!test_bit(REQUIRE_SW_SEQNO, &rt2x00dev->cap_flags))
		return;

	/*
	 * The hardware is not able to insert a sequence number. Assign a
	 * software generated one here.
	 *
	 * This is wrong because beacons are not getting sequence
	 * numbers assigned properly.
	 *
	 * A secondary problem exists for drivers that cannot toggle
	 * sequence counting per-frame, since those will override the
	 * sequence counter given by mac80211.
	 */
	spin_lock(&intf->seqlock);

	if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags))
		intf->seqno += 0x10;
	hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
	hdr->seq_ctrl |= cpu_to_le16(intf->seqno);

	spin_unlock(&intf->seqlock);

}

static void rt2x00queue_create_tx_descriptor_plcp(struct rt2x00_dev *rt2x00dev,
						  struct sk_buff *skb,
						  struct txentry_desc *txdesc,
						  const struct rt2x00_rate *hwrate)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
	unsigned int data_length;
	unsigned int duration;
	unsigned int residual;

	/*
	 * Determine with what IFS priority this frame should be send.
	 * Set ifs to IFS_SIFS when the this is not the first fragment,
	 * or this fragment came after RTS/CTS.
	 */
	if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags))
		txdesc->u.plcp.ifs = IFS_BACKOFF;
	else
		txdesc->u.plcp.ifs = IFS_SIFS;

	/* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
	data_length = skb->len + 4;
	data_length += rt2x00crypto_tx_overhead(rt2x00dev, skb);

	/*
	 * PLCP setup
	 * Length calculation depends on OFDM/CCK rate.
	 */
	txdesc->u.plcp.signal = hwrate->plcp;
	txdesc->u.plcp.service = 0x04;

	if (hwrate->flags & DEV_RATE_OFDM) {
		txdesc->u.plcp.length_high = (data_length >> 6) & 0x3f;
		txdesc->u.plcp.length_low = data_length & 0x3f;
	} else {
		/*
		 * Convert length to microseconds.
		 */
		residual = GET_DURATION_RES(data_length, hwrate->bitrate);
		duration = GET_DURATION(data_length, hwrate->bitrate);

		if (residual != 0) {
			duration++;

			/*
			 * Check if we need to set the Length Extension
			 */
			if (hwrate->bitrate == 110 && residual <= 30)
				txdesc->u.plcp.service |= 0x80;
		}

		txdesc->u.plcp.length_high = (duration >> 8) & 0xff;
		txdesc->u.plcp.length_low = duration & 0xff;

		/*
		 * When preamble is enabled we should set the
		 * preamble bit for the signal.
		 */
		if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
			txdesc->u.plcp.signal |= 0x08;
	}
}

static void rt2x00queue_create_tx_descriptor_ht(struct rt2x00_dev *rt2x00dev,
						struct sk_buff *skb,
						struct txentry_desc *txdesc,
						const struct rt2x00_rate *hwrate)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;

	if (tx_info->control.sta)
		txdesc->u.ht.mpdu_density =
		    tx_info->control.sta->ht_cap.ampdu_density;

	txdesc->u.ht.ba_size = 7;	/* FIXME: What value is needed? */

	/*
	 * Only one STBC stream is supported for now.
	 */
	if (tx_info->flags & IEEE80211_TX_CTL_STBC)
		txdesc->u.ht.stbc = 1;

	/*
	 * If IEEE80211_TX_RC_MCS is set txrate->idx just contains the
	 * mcs rate to be used
	 */
	if (txrate->flags & IEEE80211_TX_RC_MCS) {
		txdesc->u.ht.mcs = txrate->idx;

		/*
		 * MIMO PS should be set to 1 for STA's using dynamic SM PS
		 * when using more then one tx stream (>MCS7).
		 */
		if (tx_info->control.sta && txdesc->u.ht.mcs > 7 &&
		    ((tx_info->control.sta->ht_cap.cap &
		      IEEE80211_HT_CAP_SM_PS) >>
		     IEEE80211_HT_CAP_SM_PS_SHIFT) ==
		    WLAN_HT_CAP_SM_PS_DYNAMIC)
			__set_bit(ENTRY_TXD_HT_MIMO_PS, &txdesc->flags);
	} else {
		txdesc->u.ht.mcs = rt2x00_get_rate_mcs(hwrate->mcs);
		if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
			txdesc->u.ht.mcs |= 0x08;
	}

	/*
	 * This frame is eligible for an AMPDU, however, don't aggregate
	 * frames that are intended to probe a specific tx rate.
	 */
	if (tx_info->flags & IEEE80211_TX_CTL_AMPDU &&
	    !(tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE))
		__set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags);

	/*
	 * Set 40Mhz mode if necessary (for legacy rates this will
	 * duplicate the frame to both channels).
	 */
	if (txrate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH ||
	    txrate->flags & IEEE80211_TX_RC_DUP_DATA)
		__set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags);
	if (txrate->flags & IEEE80211_TX_RC_SHORT_GI)
		__set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags);

	/*
	 * Determine IFS values
	 * - Use TXOP_BACKOFF for management frames except beacons
	 * - Use TXOP_SIFS for fragment bursts
	 * - Use TXOP_HTTXOP for everything else
	 *
	 * Note: rt2800 devices won't use CTS protection (if used)
	 * for frames not transmitted with TXOP_HTTXOP
	 */
	if (ieee80211_is_mgmt(hdr->frame_control) &&
	    !ieee80211_is_beacon(hdr->frame_control))
		txdesc->u.ht.txop = TXOP_BACKOFF;
	else if (!(tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT))
		txdesc->u.ht.txop = TXOP_SIFS;
	else
		txdesc->u.ht.txop = TXOP_HTTXOP;
}

static void rt2x00queue_create_tx_descriptor(struct rt2x00_dev *rt2x00dev,
					     struct sk_buff *skb,
					     struct txentry_desc *txdesc)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0];
	struct ieee80211_rate *rate;
	const struct rt2x00_rate *hwrate = NULL;

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

	/*
	 * Header and frame information.
	 */
	txdesc->length = skb->len;
	txdesc->header_length = ieee80211_get_hdrlen_from_skb(skb);

	/*
	 * Check whether this frame is to be acked.
	 */
	if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK))
		__set_bit(ENTRY_TXD_ACK, &txdesc->flags);

	/*
	 * Check if this is a RTS/CTS frame
	 */
	if (ieee80211_is_rts(hdr->frame_control) ||
	    ieee80211_is_cts(hdr->frame_control)) {
		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
		if (ieee80211_is_rts(hdr->frame_control))
			__set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags);
		else
			__set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags);
		if (tx_info->control.rts_cts_rate_idx >= 0)
			rate =
			    ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info);
	}

	/*
	 * Determine retry information.
	 */
	txdesc->retry_limit = tx_info->control.rates[0].count - 1;
	if (txdesc->retry_limit >= rt2x00dev->long_retry)
		__set_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags);

	/*
	 * Check if more fragments are pending
	 */
	if (ieee80211_has_morefrags(hdr->frame_control)) {
		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);
		__set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags);
	}

	/*
	 * Check if more frames (!= fragments) are pending
	 */
	if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES)
		__set_bit(ENTRY_TXD_BURST, &txdesc->flags);

	/*
	 * Beacons and probe responses require the tsf timestamp
	 * to be inserted into the frame.
	 */
	if (ieee80211_is_beacon(hdr->frame_control) ||
	    ieee80211_is_probe_resp(hdr->frame_control))
		__set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags);

	if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) &&
	    !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags))
		__set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags);

	/*
	 * Determine rate modulation.
	 */
	if (txrate->flags & IEEE80211_TX_RC_GREEN_FIELD)
		txdesc->rate_mode = RATE_MODE_HT_GREENFIELD;
	else if (txrate->flags & IEEE80211_TX_RC_MCS)
		txdesc->rate_mode = RATE_MODE_HT_MIX;
	else {
		rate = ieee80211_get_tx_rate(rt2x00dev->hw, tx_info);
		hwrate = rt2x00_get_rate(rate->hw_value);
		if (hwrate->flags & DEV_RATE_OFDM)
			txdesc->rate_mode = RATE_MODE_OFDM;
		else
			txdesc->rate_mode = RATE_MODE_CCK;
	}

	/*
	 * Apply TX descriptor handling by components
	 */
	rt2x00crypto_create_tx_descriptor(rt2x00dev, skb, txdesc);
	rt2x00queue_create_tx_descriptor_seq(rt2x00dev, skb, txdesc);

	if (test_bit(REQUIRE_HT_TX_DESC, &rt2x00dev->cap_flags))
		rt2x00queue_create_tx_descriptor_ht(rt2x00dev, skb, txdesc,
						    hwrate);
	else
		rt2x00queue_create_tx_descriptor_plcp(rt2x00dev, skb, txdesc,
						      hwrate);
}

static int rt2x00queue_write_tx_data(struct queue_entry *entry,
				     struct txentry_desc *txdesc)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;

	/*
	 * This should not happen, we already checked the entry
	 * was ours. When the hardware disagrees there has been
	 * a queue corruption!
	 */
	if (unlikely(rt2x00dev->ops->lib->get_entry_state &&
		     rt2x00dev->ops->lib->get_entry_state(entry))) {
		ERROR(rt2x00dev,
		      "Corrupt queue %d, accessing entry which is not ours.\n"
		      "Please file bug report to %s.\n",
		      entry->queue->qid, DRV_PROJECT);
		return -EINVAL;
	}

	/*
	 * Add the requested extra tx headroom in front of the skb.
	 */
	skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom);
	memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom);

	/*
	 * Call the driver's write_tx_data function, if it exists.
	 */
	if (rt2x00dev->ops->lib->write_tx_data)
		rt2x00dev->ops->lib->write_tx_data(entry, txdesc);

	/*
	 * Map the skb to DMA.
	 */
	if (test_bit(REQUIRE_DMA, &rt2x00dev->cap_flags))
		rt2x00queue_map_txskb(entry);

	return 0;
}

static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry,
					    struct txentry_desc *txdesc)
{
	struct data_queue *queue = entry->queue;

	queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc);

	/*
	 * All processing on the frame has been completed, this means
	 * it is now ready to be dumped to userspace through debugfs.
	 */
	rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb);
}

static void rt2x00queue_kick_tx_queue(struct data_queue *queue,
				      struct txentry_desc *txdesc)
{
	/*
	 * Check if we need to kick the queue, there are however a few rules
	 *	1) Don't kick unless this is the last in frame in a burst.
	 *	   When the burst flag is set, this frame is always followed
	 *	   by another frame which in some way are related to eachother.
	 *	   This is true for fragments, RTS or CTS-to-self frames.
	 *	2) Rule 1 can be broken when the available entries
	 *	   in the queue are less then a certain threshold.
	 */
	if (rt2x00queue_threshold(queue) ||
	    !test_bit(ENTRY_TXD_BURST, &txdesc->flags))
		queue->rt2x00dev->ops->lib->kick_queue(queue);
}

int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
			       bool local)
{
	struct ieee80211_tx_info *tx_info;
	struct queue_entry *entry;
	struct txentry_desc txdesc;
	struct skb_frame_desc *skbdesc;
	u8 rate_idx, rate_flags;
	int ret = 0;

	/*
	 * Copy all TX descriptor information into txdesc,
	 * after that we are free to use the skb->cb array
	 * for our information.
	 */
	rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc);

	/*
	 * All information is retrieved from the skb->cb array,
	 * now we should claim ownership of the driver part of that
	 * array, preserving the bitrate index and flags.
	 */
	tx_info = IEEE80211_SKB_CB(skb);
	rate_idx = tx_info->control.rates[0].idx;
	rate_flags = tx_info->control.rates[0].flags;
	skbdesc = get_skb_frame_desc(skb);
	memset(skbdesc, 0, sizeof(*skbdesc));
	skbdesc->tx_rate_idx = rate_idx;
	skbdesc->tx_rate_flags = rate_flags;

	if (local)
		skbdesc->flags |= SKBDESC_NOT_MAC80211;

	/*
	 * When hardware encryption is supported, and this frame
	 * is to be encrypted, we should strip the IV/EIV data from
	 * the frame so we can provide it to the driver separately.
	 */
	if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) &&
	    !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) {
		if (test_bit(REQUIRE_COPY_IV, &queue->rt2x00dev->cap_flags))
			rt2x00crypto_tx_copy_iv(skb, &txdesc);
		else
			rt2x00crypto_tx_remove_iv(skb, &txdesc);
	}

	/*
	 * When DMA allocation is required we should guarantee to the
	 * driver that the DMA is aligned to a 4-byte boundary.
	 * However some drivers require L2 padding to pad the payload
	 * rather then the header. This could be a requirement for
	 * PCI and USB devices, while header alignment only is valid
	 * for PCI devices.
	 */
	if (test_bit(REQUIRE_L2PAD, &queue->rt2x00dev->cap_flags))
		rt2x00queue_insert_l2pad(skb, txdesc.header_length);
	else if (test_bit(REQUIRE_DMA, &queue->rt2x00dev->cap_flags))
		rt2x00queue_align_frame(skb);

	spin_lock(&queue->tx_lock);

	if (unlikely(rt2x00queue_full(queue))) {
		ERROR(queue->rt2x00dev,
		      "Dropping frame due to full tx queue %d.\n", queue->qid);
		ret = -ENOBUFS;
		goto out;
	}

	entry = rt2x00queue_get_entry(queue, Q_INDEX);

	if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA,
				      &entry->flags))) {
		ERROR(queue->rt2x00dev,
		      "Arrived at non-free entry in the non-full queue %d.\n"
		      "Please file bug report to %s.\n",
		      queue->qid, DRV_PROJECT);
		ret = -EINVAL;
		goto out;
	}

	skbdesc->entry = entry;
	entry->skb = skb;

	/*
	 * It could be possible that the queue was corrupted and this
	 * call failed. Since we always return NETDEV_TX_OK to mac80211,
	 * this frame will simply be dropped.
	 */
	if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) {
		clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
		entry->skb = NULL;
		ret = -EIO;
		goto out;
	}

	set_bit(ENTRY_DATA_PENDING, &entry->flags);

	rt2x00queue_index_inc(entry, Q_INDEX);
	rt2x00queue_write_tx_descriptor(entry, &txdesc);
	rt2x00queue_kick_tx_queue(queue, &txdesc);

out:
	spin_unlock(&queue->tx_lock);
	return ret;
}

int rt2x00queue_clear_beacon(struct rt2x00_dev *rt2x00dev,
			     struct ieee80211_vif *vif)
{
	struct rt2x00_intf *intf = vif_to_intf(vif);

	if (unlikely(!intf->beacon))
		return -ENOBUFS;

	mutex_lock(&intf->beacon_skb_mutex);

	/*
	 * Clean up the beacon skb.
	 */
	rt2x00queue_free_skb(intf->beacon);

	/*
	 * Clear beacon (single bssid devices don't need to clear the beacon
	 * since the beacon queue will get stopped anyway).
	 */
	if (rt2x00dev->ops->lib->clear_beacon)
		rt2x00dev->ops->lib->clear_beacon(intf->beacon);

	mutex_unlock(&intf->beacon_skb_mutex);

	return 0;
}

int rt2x00queue_update_beacon_locked(struct rt2x00_dev *rt2x00dev,
				     struct ieee80211_vif *vif)
{
	struct rt2x00_intf *intf = vif_to_intf(vif);
	struct skb_frame_desc *skbdesc;
	struct txentry_desc txdesc;

	if (unlikely(!intf->beacon))
		return -ENOBUFS;

	/*
	 * Clean up the beacon skb.
	 */
	rt2x00queue_free_skb(intf->beacon);

	intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif);
	if (!intf->beacon->skb)
		return -ENOMEM;

	/*
	 * Copy all TX descriptor information into txdesc,
	 * after that we are free to use the skb->cb array
	 * for our information.
	 */
	rt2x00queue_create_tx_descriptor(rt2x00dev, intf->beacon->skb, &txdesc);

	/*
	 * Fill in skb descriptor
	 */
	skbdesc = get_skb_frame_desc(intf->beacon->skb);
	memset(skbdesc, 0, sizeof(*skbdesc));
	skbdesc->entry = intf->beacon;

	/*
	 * Send beacon to hardware.
	 */
	rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc);

	return 0;

}

int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev,
			      struct ieee80211_vif *vif)
{
	struct rt2x00_intf *intf = vif_to_intf(vif);
	int ret;

	mutex_lock(&intf->beacon_skb_mutex);
	ret = rt2x00queue_update_beacon_locked(rt2x00dev, vif);
	mutex_unlock(&intf->beacon_skb_mutex);

	return ret;
}

bool rt2x00queue_for_each_entry(struct data_queue *queue,
				enum queue_index start,
				enum queue_index end,
				void *data,
				bool (*fn)(struct queue_entry *entry,
					   void *data))
{
	unsigned long irqflags;
	unsigned int index_start;
	unsigned int index_end;
	unsigned int i;

	if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) {
		ERROR(queue->rt2x00dev,
		      "Entry requested from invalid index range (%d - %d)\n",
		      start, end);
		return true;
	}

	/*
	 * Only protect the range we are going to loop over,
	 * if during our loop a extra entry is set to pending
	 * it should not be kicked during this run, since it
	 * is part of another TX operation.
	 */
	spin_lock_irqsave(&queue->index_lock, irqflags);
	index_start = queue->index[start];
	index_end = queue->index[end];
	spin_unlock_irqrestore(&queue->index_lock, irqflags);

	/*
	 * Start from the TX done pointer, this guarantees that we will
	 * send out all frames in the correct order.
	 */
	if (index_start < index_end) {
		for (i = index_start; i < index_end; i++) {
			if (fn(&queue->entries[i], data))
				return true;
		}
	} else {
		for (i = index_start; i < queue->limit; i++) {
			if (fn(&queue->entries[i], data))
				return true;
		}

		for (i = 0; i < index_end; i++) {
			if (fn(&queue->entries[i], data))
				return true;
		}
	}

	return false;
}
EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry);

struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
					  enum queue_index index)
{
	struct queue_entry *entry;
	unsigned long irqflags;

	if (unlikely(index >= Q_INDEX_MAX)) {
		ERROR(queue->rt2x00dev,
		      "Entry requested from invalid index type (%d)\n", index);
		return NULL;
	}

	spin_lock_irqsave(&queue->index_lock, irqflags);

	entry = &queue->entries[queue->index[index]];

	spin_unlock_irqrestore(&queue->index_lock, irqflags);

	return entry;
}
EXPORT_SYMBOL_GPL(rt2x00queue_get_entry);

void rt2x00queue_index_inc(struct queue_entry *entry, enum queue_index index)
{
	struct data_queue *queue = entry->queue;
	unsigned long irqflags;

	if (unlikely(index >= Q_INDEX_MAX)) {
		ERROR(queue->rt2x00dev,
		      "Index change on invalid index type (%d)\n", index);
		return;
	}

	spin_lock_irqsave(&queue->index_lock, irqflags);

	queue->index[index]++;
	if (queue->index[index] >= queue->limit)
		queue->index[index] = 0;

	entry->last_action = jiffies;

	if (index == Q_INDEX) {
		queue->length++;
	} else if (index == Q_INDEX_DONE) {
		queue->length--;
		queue->count++;
	}

	spin_unlock_irqrestore(&queue->index_lock, irqflags);
}

void rt2x00queue_pause_queue(struct data_queue *queue)
{
	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
	    !test_bit(QUEUE_STARTED, &queue->flags) ||
	    test_and_set_bit(QUEUE_PAUSED, &queue->flags))
		return;

	switch (queue->qid) {
	case QID_AC_VO:
	case QID_AC_VI:
	case QID_AC_BE:
	case QID_AC_BK:
		/*
		 * For TX queues, we have to disable the queue
		 * inside mac80211.
		 */
		ieee80211_stop_queue(queue->rt2x00dev->hw, queue->qid);
		break;
	default:
		break;
	}
}
EXPORT_SYMBOL_GPL(rt2x00queue_pause_queue);

void rt2x00queue_unpause_queue(struct data_queue *queue)
{
	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
	    !test_bit(QUEUE_STARTED, &queue->flags) ||
	    !test_and_clear_bit(QUEUE_PAUSED, &queue->flags))
		return;

	switch (queue->qid) {
	case QID_AC_VO:
	case QID_AC_VI:
	case QID_AC_BE:
	case QID_AC_BK:
		/*
		 * For TX queues, we have to enable the queue
		 * inside mac80211.
		 */
		ieee80211_wake_queue(queue->rt2x00dev->hw, queue->qid);
		break;
	case QID_RX:
		/*
		 * For RX we need to kick the queue now in order to
		 * receive frames.
		 */
		queue->rt2x00dev->ops->lib->kick_queue(queue);
	default:
		break;
	}
}
EXPORT_SYMBOL_GPL(rt2x00queue_unpause_queue);

void rt2x00queue_start_queue(struct data_queue *queue)
{
	mutex_lock(&queue->status_lock);

	if (!test_bit(DEVICE_STATE_PRESENT, &queue->rt2x00dev->flags) ||
	    test_and_set_bit(QUEUE_STARTED, &queue->flags)) {
		mutex_unlock(&queue->status_lock);
		return;
	}

	set_bit(QUEUE_PAUSED, &queue->flags);

	queue->rt2x00dev->ops->lib->start_queue(queue);

	rt2x00queue_unpause_queue(queue);

	mutex_unlock(&queue->status_lock);
}
EXPORT_SYMBOL_GPL(rt2x00queue_start_queue);

void rt2x00queue_stop_queue(struct data_queue *queue)
{
	mutex_lock(&queue->status_lock);

	if (!test_and_clear_bit(QUEUE_STARTED, &queue->flags)) {
		mutex_unlock(&queue->status_lock);
		return;
	}

	rt2x00queue_pause_queue(queue);

	queue->rt2x00dev->ops->lib->stop_queue(queue);

	mutex_unlock(&queue->status_lock);
}
EXPORT_SYMBOL_GPL(rt2x00queue_stop_queue);

void rt2x00queue_flush_queue(struct data_queue *queue, bool drop)
{
	bool started;
	bool tx_queue =
		(queue->qid == QID_AC_VO) ||
		(queue->qid == QID_AC_VI) ||
		(queue->qid == QID_AC_BE) ||
		(queue->qid == QID_AC_BK);

	mutex_lock(&queue->status_lock);

	/*
	 * If the queue has been started, we must stop it temporarily
	 * to prevent any new frames to be queued on the device. If
	 * we are not dropping the pending frames, the queue must
	 * only be stopped in the software and not the hardware,
	 * otherwise the queue will never become empty on its own.
	 */
	started = test_bit(QUEUE_STARTED, &queue->flags);
	if (started) {
		/*
		 * Pause the queue
		 */
		rt2x00queue_pause_queue(queue);

		/*
		 * If we are not supposed to drop any pending
		 * frames, this means we must force a start (=kick)
		 * to the queue to make sure the hardware will
		 * start transmitting.
		 */
		if (!drop && tx_queue)
			queue->rt2x00dev->ops->lib->kick_queue(queue);
	}

	/*
	 * Check if driver supports flushing, if that is the case we can
	 * defer the flushing to the driver. Otherwise we must use the
	 * alternative which just waits for the queue to become empty.
	 */
	if (likely(queue->rt2x00dev->ops->lib->flush_queue))
		queue->rt2x00dev->ops->lib->flush_queue(queue, drop);

	/*
	 * The queue flush has failed...
	 */
	if (unlikely(!rt2x00queue_empty(queue)))
		WARNING(queue->rt2x00dev, "Queue %d failed to flush\n", queue->qid);

	/*
	 * Restore the queue to the previous status
	 */
	if (started)
		rt2x00queue_unpause_queue(queue);

	mutex_unlock(&queue->status_lock);
}
EXPORT_SYMBOL_GPL(rt2x00queue_flush_queue);

void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	/*
	 * rt2x00queue_start_queue will call ieee80211_wake_queue
	 * for each queue after is has been properly initialized.
	 */
	tx_queue_for_each(rt2x00dev, queue)
		rt2x00queue_start_queue(queue);

	rt2x00queue_start_queue(rt2x00dev->rx);
}
EXPORT_SYMBOL_GPL(rt2x00queue_start_queues);

void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	/*
	 * rt2x00queue_stop_queue will call ieee80211_stop_queue
	 * as well, but we are completely shutting doing everything
	 * now, so it is much safer to stop all TX queues at once,
	 * and use rt2x00queue_stop_queue for cleaning up.
	 */
	ieee80211_stop_queues(rt2x00dev->hw);

	tx_queue_for_each(rt2x00dev, queue)
		rt2x00queue_stop_queue(queue);

	rt2x00queue_stop_queue(rt2x00dev->rx);
}
EXPORT_SYMBOL_GPL(rt2x00queue_stop_queues);

void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop)
{
	struct data_queue *queue;

	tx_queue_for_each(rt2x00dev, queue)
		rt2x00queue_flush_queue(queue, drop);

	rt2x00queue_flush_queue(rt2x00dev->rx, drop);
}
EXPORT_SYMBOL_GPL(rt2x00queue_flush_queues);

static void rt2x00queue_reset(struct data_queue *queue)
{
	unsigned long irqflags;
	unsigned int i;

	spin_lock_irqsave(&queue->index_lock, irqflags);

	queue->count = 0;
	queue->length = 0;

	for (i = 0; i < Q_INDEX_MAX; i++)
		queue->index[i] = 0;

	spin_unlock_irqrestore(&queue->index_lock, irqflags);
}

void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;
	unsigned int i;

	queue_for_each(rt2x00dev, queue) {
		rt2x00queue_reset(queue);

		for (i = 0; i < queue->limit; i++)
			rt2x00dev->ops->lib->clear_entry(&queue->entries[i]);
	}
}

static int rt2x00queue_alloc_entries(struct data_queue *queue,
				     const struct data_queue_desc *qdesc)
{
	struct queue_entry *entries;
	unsigned int entry_size;
	unsigned int i;

	rt2x00queue_reset(queue);

	queue->limit = qdesc->entry_num;
	queue->threshold = DIV_ROUND_UP(qdesc->entry_num, 10);
	queue->data_size = qdesc->data_size;
	queue->desc_size = qdesc->desc_size;

	/*
	 * Allocate all queue entries.
	 */
	entry_size = sizeof(*entries) + qdesc->priv_size;
	entries = kcalloc(queue->limit, entry_size, GFP_KERNEL);
	if (!entries)
		return -ENOMEM;

#define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
	(((char *)(__base)) + ((__limit) * (__esize)) + \
	    ((__index) * (__psize)))

	for (i = 0; i < queue->limit; i++) {
		entries[i].flags = 0;
		entries[i].queue = queue;
		entries[i].skb = NULL;
		entries[i].entry_idx = i;
		entries[i].priv_data =
		    QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit,
					    sizeof(*entries), qdesc->priv_size);
	}

#undef QUEUE_ENTRY_PRIV_OFFSET

	queue->entries = entries;

	return 0;
}

static void rt2x00queue_free_skbs(struct data_queue *queue)
{
	unsigned int i;

	if (!queue->entries)
		return;

	for (i = 0; i < queue->limit; i++) {
		rt2x00queue_free_skb(&queue->entries[i]);
	}
}

static int rt2x00queue_alloc_rxskbs(struct data_queue *queue)
{
	unsigned int i;
	struct sk_buff *skb;

	for (i = 0; i < queue->limit; i++) {
		skb = rt2x00queue_alloc_rxskb(&queue->entries[i]);
		if (!skb)
			return -ENOMEM;
		queue->entries[i].skb = skb;
	}

	return 0;
}

int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;
	int status;

	status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx);
	if (status)
		goto exit;

	tx_queue_for_each(rt2x00dev, queue) {
		status = rt2x00queue_alloc_entries(queue, rt2x00dev->ops->tx);
		if (status)
			goto exit;
	}

	status = rt2x00queue_alloc_entries(rt2x00dev->bcn, rt2x00dev->ops->bcn);
	if (status)
		goto exit;

	if (test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags)) {
		status = rt2x00queue_alloc_entries(rt2x00dev->atim,
						   rt2x00dev->ops->atim);
		if (status)
			goto exit;
	}

	status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx);
	if (status)
		goto exit;

	return 0;

exit:
	ERROR(rt2x00dev, "Queue entries allocation failed.\n");

	rt2x00queue_uninitialize(rt2x00dev);

	return status;
}

void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	rt2x00queue_free_skbs(rt2x00dev->rx);

	queue_for_each(rt2x00dev, queue) {
		kfree(queue->entries);
		queue->entries = NULL;
	}
}

static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev,
			     struct data_queue *queue, enum data_queue_qid qid)
{
	mutex_init(&queue->status_lock);
	spin_lock_init(&queue->tx_lock);
	spin_lock_init(&queue->index_lock);

	queue->rt2x00dev = rt2x00dev;
	queue->qid = qid;
	queue->txop = 0;
	queue->aifs = 2;
	queue->cw_min = 5;
	queue->cw_max = 10;
}

int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;
	enum data_queue_qid qid;
	unsigned int req_atim =
	    !!test_bit(REQUIRE_ATIM_QUEUE, &rt2x00dev->cap_flags);

	/*
	 * We need the following queues:
	 * RX: 1
	 * TX: ops->tx_queues
	 * Beacon: 1
	 * Atim: 1 (if required)
	 */
	rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim;

	queue = kcalloc(rt2x00dev->data_queues, sizeof(*queue), GFP_KERNEL);
	if (!queue) {
		ERROR(rt2x00dev, "Queue allocation failed.\n");
		return -ENOMEM;
	}

	/*
	 * Initialize pointers
	 */
	rt2x00dev->rx = queue;
	rt2x00dev->tx = &queue[1];
	rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues];
	rt2x00dev->atim = req_atim ? &queue[2 + rt2x00dev->ops->tx_queues] : NULL;

	/*
	 * Initialize queue parameters.
	 * RX: qid = QID_RX
	 * TX: qid = QID_AC_VO + index
	 * TX: cw_min: 2^5 = 32.
	 * TX: cw_max: 2^10 = 1024.
	 * BCN: qid = QID_BEACON
	 * ATIM: qid = QID_ATIM
	 */
	rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX);

	qid = QID_AC_VO;
	tx_queue_for_each(rt2x00dev, queue)
		rt2x00queue_init(rt2x00dev, queue, qid++);

	rt2x00queue_init(rt2x00dev, rt2x00dev->bcn, QID_BEACON);
	if (req_atim)
		rt2x00queue_init(rt2x00dev, rt2x00dev->atim, QID_ATIM);

	return 0;
}

void rt2x00queue_free(struct rt2x00_dev *rt2x00dev)
{
	kfree(rt2x00dev->rx);
	rt2x00dev->rx = NULL;
	rt2x00dev->tx = NULL;
	rt2x00dev->bcn = NULL;
}
OpenPOWER on IntegriCloud