aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-sta.c
blob: fae5d6d528d41b9f21d35b7ccc82273a72123b26 (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
/******************************************************************************
 *
 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project, as well
 * as portions of the ieee80211 subsystem header files.
 *
 * 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 LICENSE.
 *
 * Contact Information:
 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/

#include <net/mac80211.h>
#include <linux/etherdevice.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-sta.h"
#include "iwl-io.h"
#include "iwl-helpers.h"


#define IWL_STA_DRIVER_ACTIVE		0x1     /* ucode entry is active */
#define IWL_STA_UCODE_ACTIVE		0x2     /* ucode entry is active */

u8 iwl_find_station(struct iwl_priv *priv, const u8 *addr)
{
	int i;
	int start = 0;
	int ret = IWL_INVALID_STATION;
	unsigned long flags;
	DECLARE_MAC_BUF(mac);

	if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
	    (priv->iw_mode == IEEE80211_IF_TYPE_AP))
		start = IWL_STA_ID;

	if (is_broadcast_ether_addr(addr))
		return priv->hw_params.bcast_sta_id;

	spin_lock_irqsave(&priv->sta_lock, flags);
	for (i = start; i < priv->hw_params.max_stations; i++)
		if (priv->stations[i].used &&
		    (!compare_ether_addr(priv->stations[i].sta.sta.addr,
					 addr))) {
			ret = i;
			goto out;
		}

	IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
			      print_mac(mac, addr), priv->num_stations);

 out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
}
EXPORT_SYMBOL(iwl_find_station);

static int iwl_add_sta_callback(struct iwl_priv *priv,
				   struct iwl_cmd *cmd, struct sk_buff *skb)
{
	struct iwl_rx_packet *res = NULL;

	if (!skb) {
		IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
		return 1;
	}

	res = (struct iwl_rx_packet *)skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		return 1;
	}

	switch (res->u.add_sta.status) {
	case ADD_STA_SUCCESS_MSK:
		/* FIXME: implement iwl_sta_ucode_activate(priv, addr); */
		/* fail through */
	default:
		IWL_DEBUG_HC("Received REPLY_ADD_STA:(0x%08X)\n",
			     res->u.add_sta.status);
		break;
	}

	/* We didn't cache the SKB; let the caller free it */
	return 1;
}



int iwl_send_add_sta(struct iwl_priv *priv,
		     struct iwl_addsta_cmd *sta, u8 flags)
{
	struct iwl_rx_packet *res = NULL;
	int ret = 0;
	u8 data[sizeof(*sta)];
	struct iwl_host_cmd cmd = {
		.id = REPLY_ADD_STA,
		.meta.flags = flags,
		.data = data,
	};

	if (flags & CMD_ASYNC)
		cmd.meta.u.callback = iwl_add_sta_callback;
	else
		cmd.meta.flags |= CMD_WANT_SKB;

	cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
	ret = iwl_send_cmd(priv, &cmd);

	if (ret || (flags & CMD_ASYNC))
		return ret;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
			  res->hdr.flags);
		ret = -EIO;
	}

	if (ret == 0) {
		switch (res->u.add_sta.status) {
		case ADD_STA_SUCCESS_MSK:
			IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
			break;
		default:
			ret = -EIO;
			IWL_WARNING("REPLY_ADD_STA failed\n");
			break;
		}
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return ret;
}
EXPORT_SYMBOL(iwl_send_add_sta);

static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
				   struct ieee80211_ht_info *sta_ht_inf)
{
	__le32 sta_flags;
	u8 mimo_ps_mode;

	if (!sta_ht_inf || !sta_ht_inf->ht_supported)
		goto done;

	mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;

	sta_flags = priv->stations[index].sta.station_flags;

	sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);

	switch (mimo_ps_mode) {
	case WLAN_HT_CAP_MIMO_PS_STATIC:
		sta_flags |= STA_FLG_MIMO_DIS_MSK;
		break;
	case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
		sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
		break;
	case WLAN_HT_CAP_MIMO_PS_DISABLED:
		break;
	default:
		IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
		break;
	}

	sta_flags |= cpu_to_le32(
	      (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);

	sta_flags |= cpu_to_le32(
	      (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);

	if (iwl_is_fat_tx_allowed(priv, sta_ht_inf))
		sta_flags |= STA_FLG_FAT_EN_MSK;
	else
		sta_flags &= ~STA_FLG_FAT_EN_MSK;

	priv->stations[index].sta.station_flags = sta_flags;
 done:
	return;
}

/**
 * iwl_add_station_flags - Add station to tables in driver and device
 */
u8 iwl_add_station_flags(struct iwl_priv *priv, const u8 *addr, int is_ap,
			 u8 flags, struct ieee80211_ht_info *ht_info)
{
	int i;
	int index = IWL_INVALID_STATION;
	struct iwl_station_entry *station;
	unsigned long flags_spin;
	DECLARE_MAC_BUF(mac);

	spin_lock_irqsave(&priv->sta_lock, flags_spin);
	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_params.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
			if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

			if (!priv->stations[i].used &&
			    index == IWL_INVALID_STATION)
				index = i;
		}


	/* These two conditions have the same outcome, but keep them separate
	  since they have different meanings */
	if (unlikely(index == IWL_INVALID_STATION)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}

	if (priv->stations[index].used &&
	    !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
		spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
		return index;
	}


	IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
	station = &priv->stations[index];
	station->used = 1;
	priv->num_stations++;

	/* Set up the REPLY_ADD_STA command to send to device */
	memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
	station->sta.mode = 0;
	station->sta.sta.sta_id = index;
	station->sta.station_flags = 0;

	/* BCAST station and IBSS stations do not work in HT mode */
	if (index != priv->hw_params.bcast_sta_id &&
	    priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
		iwl_set_ht_add_station(priv, index, ht_info);

	spin_unlock_irqrestore(&priv->sta_lock, flags_spin);

	/* Add station to device's station table */
	iwl_send_add_sta(priv, &station->sta, flags);
	return index;

}
EXPORT_SYMBOL(iwl_add_station_flags);


static int iwl_sta_ucode_deactivate(struct iwl_priv *priv, const char *addr)
{
	unsigned long flags;
	u8 sta_id;
	DECLARE_MAC_BUF(mac);

	sta_id = iwl_find_station(priv, addr);
	if (sta_id != IWL_INVALID_STATION) {
		IWL_DEBUG_ASSOC("Removed STA from Ucode: %s\n",
				print_mac(mac, addr));
		spin_lock_irqsave(&priv->sta_lock, flags);
		priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
		memset(&priv->stations[sta_id], 0,
			sizeof(struct iwl_station_entry));
		spin_unlock_irqrestore(&priv->sta_lock, flags);
		return 0;
	}
	return -EINVAL;
}

static int iwl_remove_sta_callback(struct iwl_priv *priv,
				   struct iwl_cmd *cmd, struct sk_buff *skb)
{
	struct iwl_rx_packet *res = NULL;
	const char *addr = cmd->cmd.rm_sta.addr;

	if (!skb) {
		IWL_ERROR("Error: Response NULL in REPLY_REMOVE_STA.\n");
		return 1;
	}

	res = (struct iwl_rx_packet *)skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
		res->hdr.flags);
		return 1;
	}

	switch (res->u.rem_sta.status) {
	case REM_STA_SUCCESS_MSK:
		iwl_sta_ucode_deactivate(priv, addr);
		break;
	default:
		break;
	}

	/* We didn't cache the SKB; let the caller free it */
	return 1;
}

static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr,
				   u8 flags)
{
	struct iwl_rx_packet *res = NULL;
	int ret;

	struct iwl_rem_sta_cmd rm_sta_cmd;

	struct iwl_host_cmd cmd = {
		.id = REPLY_REMOVE_STA,
		.len = sizeof(struct iwl_rem_sta_cmd),
		.meta.flags = flags,
		.data = &rm_sta_cmd,
	};

	memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
	rm_sta_cmd.num_sta = 1;
	memcpy(&rm_sta_cmd.addr, addr , ETH_ALEN);

	if (flags & CMD_ASYNC)
		cmd.meta.u.callback = iwl_remove_sta_callback;
	else
		cmd.meta.flags |= CMD_WANT_SKB;
	ret = iwl_send_cmd(priv, &cmd);

	if (ret || (flags & CMD_ASYNC))
		return ret;

	res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
	if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
		IWL_ERROR("Bad return from REPLY_REMOVE_STA (0x%08X)\n",
			  res->hdr.flags);
		ret = -EIO;
	}

	if (!ret) {
		switch (res->u.rem_sta.status) {
		case REM_STA_SUCCESS_MSK:
			iwl_sta_ucode_deactivate(priv, addr);
			IWL_DEBUG_ASSOC("REPLY_REMOVE_STA PASSED\n");
			break;
		default:
			ret = -EIO;
			IWL_ERROR("REPLY_REMOVE_STA failed\n");
			break;
		}
	}

	priv->alloc_rxb_skb--;
	dev_kfree_skb_any(cmd.meta.u.skb);

	return ret;
}
/**
 * iwl_remove_station - Remove driver's knowledge of station.
 *
 */
u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
	int index = IWL_INVALID_STATION;
	int i;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	if (is_ap)
		index = IWL_AP_ID;
	else if (is_broadcast_ether_addr(addr))
		index = priv->hw_params.bcast_sta_id;
	else
		for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++)
			if (priv->stations[i].used &&
			    !compare_ether_addr(priv->stations[i].sta.sta.addr,
						addr)) {
				index = i;
				break;
			}

	if (unlikely(index == IWL_INVALID_STATION))
		goto out;

	if (priv->stations[index].used) {
		priv->stations[index].used = 0;
		priv->num_stations--;
	}

	BUG_ON(priv->num_stations < 0);
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	iwl_send_remove_station(priv, addr, CMD_ASYNC);
	return index;
out:
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return 0;
}
EXPORT_SYMBOL(iwl_remove_station);
int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
{
	int i;

	for (i = 0; i < STA_KEY_MAX_NUM; i++)
		if (!test_and_set_bit(i, &priv->ucode_key_table))
			return i;

	return -1;
}

int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, u8 send_if_empty)
{
	int i, not_empty = 0;
	u8 buff[sizeof(struct iwl_wep_cmd) +
		sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
	struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
	size_t cmd_size  = sizeof(struct iwl_wep_cmd);
	struct iwl_host_cmd cmd = {
		.id = REPLY_WEPKEY,
		.data = wep_cmd,
		.meta.flags = CMD_ASYNC,
	};

	memset(wep_cmd, 0, cmd_size +
			(sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));

	for (i = 0; i < WEP_KEYS_MAX ; i++) {
		wep_cmd->key[i].key_index = i;
		if (priv->wep_keys[i].key_size) {
			wep_cmd->key[i].key_offset = i;
			not_empty = 1;
		} else {
			wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
		}

		wep_cmd->key[i].key_size = priv->wep_keys[i].key_size;
		memcpy(&wep_cmd->key[i].key[3], priv->wep_keys[i].key,
				priv->wep_keys[i].key_size);
	}

	wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
	wep_cmd->num_keys = WEP_KEYS_MAX;

	cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;

	cmd.len = cmd_size;

	if (not_empty || send_if_empty)
		return iwl_send_cmd(priv, &cmd);
	else
		return 0;
}
EXPORT_SYMBOL(iwl_send_static_wepkey_cmd);

int iwl_remove_default_wep_key(struct iwl_priv *priv,
			       struct ieee80211_key_conf *keyconf)
{
	int ret;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_lock, flags);

	if (!test_and_clear_bit(keyconf->keyidx, &priv->ucode_key_table))
		IWL_ERROR("index %d not used in uCode key table.\n",
			  keyconf->keyidx);

	priv->default_wep_key--;
	memset(&priv->wep_keys[keyconf->keyidx], 0, sizeof(priv->wep_keys[0]));
	ret = iwl_send_static_wepkey_cmd(priv, 1);
	IWL_DEBUG_WEP("Remove default WEP key: idx=%d ret=%d\n",
		      keyconf->keyidx, ret);
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	return ret;
}
EXPORT_SYMBOL(iwl_remove_default_wep_key);

int iwl_set_default_wep_key(struct iwl_priv *priv,
			    struct ieee80211_key_conf *keyconf)
{
	int ret;
	unsigned long flags;

	if (keyconf->keylen != WEP_KEY_LEN_128 &&
	    keyconf->keylen != WEP_KEY_LEN_64) {
		IWL_DEBUG_WEP("Bad WEP key length %d\n", keyconf->keylen);
		return -EINVAL;
	}

	keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;
	keyconf->hw_key_idx = HW_KEY_DEFAULT;
	priv->stations[IWL_AP_ID].keyinfo.alg = ALG_WEP;

	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->default_wep_key++;

	if (test_and_set_bit(keyconf->keyidx, &priv->ucode_key_table))
		IWL_ERROR("index %d already used in uCode key table.\n",
			keyconf->keyidx);

	priv->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
	memcpy(&priv->wep_keys[keyconf->keyidx].key, &keyconf->key,
							keyconf->keylen);

	ret = iwl_send_static_wepkey_cmd(priv, 0);
	IWL_DEBUG_WEP("Set default WEP key: len=%d idx=%d ret=%d\n",
		keyconf->keylen, keyconf->keyidx, ret);
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	return ret;
}
EXPORT_SYMBOL(iwl_set_default_wep_key);

static int iwl_set_wep_dynamic_key_info(struct iwl_priv *priv,
				struct ieee80211_key_conf *keyconf,
				u8 sta_id)
{
	unsigned long flags;
	__le16 key_flags = 0;
	int ret;

	keyconf->flags &= ~IEEE80211_KEY_FLAG_GENERATE_IV;

	key_flags |= (STA_KEY_FLG_WEP | STA_KEY_FLG_MAP_KEY_MSK);
	key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
	key_flags &= ~STA_KEY_FLG_INVALID;

	if (keyconf->keylen == WEP_KEY_LEN_128)
		key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;

	if (sta_id == priv->hw_params.bcast_sta_id)
		key_flags |= STA_KEY_MULTICAST_MSK;

	spin_lock_irqsave(&priv->sta_lock, flags);

	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
	priv->stations[sta_id].keyinfo.keyidx = keyconf->keyidx;

	memcpy(priv->stations[sta_id].keyinfo.key,
				keyconf->key, keyconf->keylen);

	memcpy(&priv->stations[sta_id].sta.key.key[3],
				keyconf->key, keyconf->keylen);

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
			== STA_KEY_FLG_NO_ENC)
		priv->stations[sta_id].sta.key.key_offset =
				 iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	 * in uCode. */

	priv->stations[sta_id].sta.key.key_flags = key_flags;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	ret = iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	return ret;
}

static int iwl_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
				   struct ieee80211_key_conf *keyconf,
				   u8 sta_id)
{
	unsigned long flags;
	__le16 key_flags = 0;

	key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
	key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
	key_flags &= ~STA_KEY_FLG_INVALID;

	if (sta_id == priv->hw_params.bcast_sta_id)
		key_flags |= STA_KEY_MULTICAST_MSK;

	keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;

	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;

	memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
	       keyconf->keylen);

	memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
	       keyconf->keylen);

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
			== STA_KEY_FLG_NO_ENC)
		priv->stations[sta_id].sta.key.key_offset =
				 iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	 * in uCode. */

	priv->stations[sta_id].sta.key.key_flags = key_flags;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
	return iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}

static int iwl_set_tkip_dynamic_key_info(struct iwl_priv *priv,
				   struct ieee80211_key_conf *keyconf,
				   u8 sta_id)
{
	unsigned long flags;
	int ret = 0;

	keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
	keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;

	spin_lock_irqsave(&priv->sta_lock, flags);

	priv->stations[sta_id].keyinfo.alg = keyconf->alg;
	priv->stations[sta_id].keyinfo.keylen = 16;

	if ((priv->stations[sta_id].sta.key.key_flags & STA_KEY_FLG_ENCRYPT_MSK)
			== STA_KEY_FLG_NO_ENC)
		priv->stations[sta_id].sta.key.key_offset =
				 iwl_get_free_ucode_key_index(priv);
	/* else, we are overriding an existing key => no need to allocated room
	 * in uCode. */

	/* This copy is acutally not needed: we get the key with each TX */
	memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);

	memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);

	spin_unlock_irqrestore(&priv->sta_lock, flags);

	return ret;
}

int iwl_remove_dynamic_key(struct iwl_priv *priv,
				struct ieee80211_key_conf *keyconf,
				u8 sta_id)
{
	unsigned long flags;
	int ret = 0;
	u16 key_flags;
	u8 keyidx;

	priv->key_mapping_key--;

	spin_lock_irqsave(&priv->sta_lock, flags);
	key_flags = le16_to_cpu(priv->stations[sta_id].sta.key.key_flags);
	keyidx = (key_flags >> STA_KEY_FLG_KEYID_POS) & 0x3;

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

	if (keyconf->keyidx != keyidx) {
		/* We need to remove a key with index different that the one
		 * in the uCode. This means that the key we need to remove has
		 * been replaced by another one with different index.
		 * Don't do anything and return ok
		 */
		spin_unlock_irqrestore(&priv->sta_lock, flags);
		return 0;
	}

	if (!test_and_clear_bit(priv->stations[sta_id].sta.key.key_offset,
		&priv->ucode_key_table))
		IWL_ERROR("index %d not used in uCode key table.\n",
			priv->stations[sta_id].sta.key.key_offset);
	memset(&priv->stations[sta_id].keyinfo, 0,
					sizeof(struct iwl_hw_key));
	memset(&priv->stations[sta_id].sta.key, 0,
					sizeof(struct iwl4965_keyinfo));
	priv->stations[sta_id].sta.key.key_flags =
			STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID;
	priv->stations[sta_id].sta.key.key_offset = WEP_INVALID_OFFSET;
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;

	ret =  iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
	spin_unlock_irqrestore(&priv->sta_lock, flags);
	return ret;
}
EXPORT_SYMBOL(iwl_remove_dynamic_key);

int iwl_set_dynamic_key(struct iwl_priv *priv,
				struct ieee80211_key_conf *keyconf, u8 sta_id)
{
	int ret;

	priv->key_mapping_key++;
	keyconf->hw_key_idx = HW_KEY_DYNAMIC;

	switch (keyconf->alg) {
	case ALG_CCMP:
		ret = iwl_set_ccmp_dynamic_key_info(priv, keyconf, sta_id);
		break;
	case ALG_TKIP:
		ret = iwl_set_tkip_dynamic_key_info(priv, keyconf, sta_id);
		break;
	case ALG_WEP:
		ret = iwl_set_wep_dynamic_key_info(priv, keyconf, sta_id);
		break;
	default:
		IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, keyconf->alg);
		ret = -EINVAL;
	}

	IWL_DEBUG_WEP("Set dynamic key: alg= %d len=%d idx=%d sta=%d ret=%d\n",
		      keyconf->alg, keyconf->keylen, keyconf->keyidx,
		      sta_id, ret);

	return ret;
}
EXPORT_SYMBOL(iwl_set_dynamic_key);

#ifdef CONFIG_IWLWIFI_DEBUG
static void iwl_dump_lq_cmd(struct iwl_priv *priv,
			   struct iwl_link_quality_cmd *lq)
{
	int i;
	IWL_DEBUG_RATE("lq station id 0x%x\n", lq->sta_id);
	IWL_DEBUG_RATE("lq dta 0x%X 0x%X\n",
		       lq->general_params.single_stream_ant_msk,
		       lq->general_params.dual_stream_ant_msk);

	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
		IWL_DEBUG_RATE("lq index %d 0x%X\n",
			       i, lq->rs_table[i].rate_n_flags);
}
#else
static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
				   struct iwl_link_quality_cmd *lq)
{
}
#endif

int iwl_send_lq_cmd(struct iwl_priv *priv,
		    struct iwl_link_quality_cmd *lq, u8 flags)
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_TX_LINK_QUALITY_CMD,
		.len = sizeof(struct iwl_link_quality_cmd),
		.meta.flags = flags,
		.data = lq,
	};

	if ((lq->sta_id == 0xFF) &&
	    (priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
		return -EINVAL;

	if (lq->sta_id == 0xFF)
		lq->sta_id = IWL_AP_ID;

	iwl_dump_lq_cmd(priv,lq);

	if (iwl_is_associated(priv) && priv->assoc_station_added &&
	    priv->lq_mngr.lq_ready)
		return  iwl_send_cmd(priv, &cmd);

	return 0;
}
EXPORT_SYMBOL(iwl_send_lq_cmd);

/**
 * iwl_sta_init_lq - Initialize a station's hardware rate table
 *
 * The uCode's station table contains a table of fallback rates
 * for automatic fallback during transmission.
 *
 * NOTE: This sets up a default set of values.  These will be replaced later
 *       if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
 *       rc80211_simple.
 *
 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
 *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
 *       which requires station table entry to exist).
 */
static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
	int i, r;
	struct iwl_link_quality_cmd link_cmd = {
		.reserved1 = 0,
	};
	u16 rate_flags;

	/* Set up the rate scaling to start at selected rate, fall back
	 * all the way down to 1M in IEEE order, and then spin on 1M */
	if (is_ap)
		r = IWL_RATE_54M_INDEX;
	else if (priv->band == IEEE80211_BAND_5GHZ)
		r = IWL_RATE_6M_INDEX;
	else
		r = IWL_RATE_1M_INDEX;

	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
		rate_flags = 0;
		if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
			rate_flags |= RATE_MCS_CCK_MSK;

		/* Use Tx antenna B only */
		rate_flags |= RATE_MCS_ANT_B_MSK; /*FIXME:RS*/

		link_cmd.rs_table[i].rate_n_flags =
			iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
		r = iwl4965_get_prev_ieee_rate(r);
	}

	link_cmd.general_params.single_stream_ant_msk = 2;
	link_cmd.general_params.dual_stream_ant_msk = 3;
	link_cmd.agg_params.agg_dis_start_th = 3;
	link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);

	/* Update the rate scaling for control frame Tx to AP */
	link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;

	iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
			       sizeof(link_cmd), &link_cmd, NULL);
}
/**
 * iwl_rxon_add_station - add station into station table.
 *
 * there is only one AP station with id= IWL_AP_ID
 * NOTE: mutex must be held before calling this fnction
 */
int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
{
	u8 sta_id;

	/* Add station to device's station table */
	struct ieee80211_conf *conf = &priv->hw->conf;
	struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;

	if ((is_ap) &&
	    (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
	    (priv->iw_mode == IEEE80211_IF_TYPE_STA))
		sta_id = iwl_add_station_flags(priv, addr, is_ap,
						   0, cur_ht_config);
	else
		sta_id = iwl_add_station_flags(priv, addr, is_ap,
						   0, NULL);

	/* Set up default rate scaling table in device's station table */
	iwl_sta_init_lq(priv, addr, is_ap);

	return sta_id;
}
EXPORT_SYMBOL(iwl_rxon_add_station);


/**
 * iwl_get_sta_id - Find station's index within station table
 *
 * If new IBSS station, create new entry in station table
 */
int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
{
	int sta_id;
	u16 fc = le16_to_cpu(hdr->frame_control);
	DECLARE_MAC_BUF(mac);

	/* If this frame is broadcast or management, use broadcast station id */
	if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
	    is_multicast_ether_addr(hdr->addr1))
		return priv->hw_params.bcast_sta_id;

	switch (priv->iw_mode) {

	/* If we are a client station in a BSS network, use the special
	 * AP station entry (that's the only station we communicate with) */
	case IEEE80211_IF_TYPE_STA:
		return IWL_AP_ID;

	/* If we are an AP, then find the station, or use BCAST */
	case IEEE80211_IF_TYPE_AP:
		sta_id = iwl_find_station(priv, hdr->addr1);
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;
		return priv->hw_params.bcast_sta_id;

	/* If this frame is going out to an IBSS network, find the station,
	 * or create a new station table entry */
	case IEEE80211_IF_TYPE_IBSS:
		sta_id = iwl_find_station(priv, hdr->addr1);
		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

		/* Create new station table entry */
		sta_id = iwl_add_station_flags(priv, hdr->addr1,
						   0, CMD_ASYNC, NULL);

		if (sta_id != IWL_INVALID_STATION)
			return sta_id;

		IWL_DEBUG_DROP("Station %s not in station map. "
			       "Defaulting to broadcast...\n",
			       print_mac(mac, hdr->addr1));
		iwl_print_hex_dump(priv, IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
		return priv->hw_params.bcast_sta_id;

	default:
		IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
		return priv->hw_params.bcast_sta_id;
	}
}
EXPORT_SYMBOL(iwl_get_sta_id);


/**
 * iwl_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
 */
void iwl_sta_modify_enable_tid_tx(struct iwl_priv *priv, int sta_id, int tid)
{
	unsigned long flags;

	/* Remove "disable" flag, to enable Tx for this TID */
	spin_lock_irqsave(&priv->sta_lock, flags);
	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
	priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
	spin_unlock_irqrestore(&priv->sta_lock, flags);

	iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
EXPORT_SYMBOL(iwl_sta_modify_enable_tid_tx);