summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/mwifiex/11n.c
blob: 34bba5234294f5b17eb56e2b77bc0f86091f2775 (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
/*
 * Marvell Wireless LAN device driver: 802.11n
 *
 * Copyright (C) 2011, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"

/*
 * Fills HT capability information field, AMPDU Parameters field, HT extended
 * capability field, and supported MCS set fields.
 *
 * HT capability information field, AMPDU Parameters field, supported MCS set
 * fields are retrieved from cfg80211 stack
 *
 * RD responder bit to set to clear in the extended capability header.
 */
void
mwifiex_fill_cap_info(struct mwifiex_private *priv, u8 radio_type,
		      struct mwifiex_ie_types_htcap *ht_cap)
{
	uint16_t ht_ext_cap = le16_to_cpu(ht_cap->ht_cap.extended_ht_cap_info);
	struct ieee80211_supported_band *sband =
					priv->wdev->wiphy->bands[radio_type];

	ht_cap->ht_cap.ampdu_params_info =
		(sband->ht_cap.ampdu_factor &
		 IEEE80211_HT_AMPDU_PARM_FACTOR)|
		((sband->ht_cap.ampdu_density <<
		 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT) &
		 IEEE80211_HT_AMPDU_PARM_DENSITY);

	memcpy((u8 *) &ht_cap->ht_cap.mcs, &sband->ht_cap.mcs,
						sizeof(sband->ht_cap.mcs));

	if (priv->bss_mode == NL80211_IFTYPE_STATION ||
			(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
		/* Set MCS32 for infra mode or ad-hoc mode with 40MHz support */
		SETHT_MCS32(ht_cap->ht_cap.mcs.rx_mask);

	/* Clear RD responder bit */
	ht_ext_cap &= ~IEEE80211_HT_EXT_CAP_RD_RESPONDER;

	ht_cap->ht_cap.cap_info = cpu_to_le16(sband->ht_cap.cap);
	ht_cap->ht_cap.extended_ht_cap_info = cpu_to_le16(ht_ext_cap);
}

/*
 * This function returns the pointer to an entry in BA Stream
 * table which matches the requested BA status.
 */
static struct mwifiex_tx_ba_stream_tbl *
mwifiex_11n_get_tx_ba_stream_status(struct mwifiex_private *priv,
				  enum mwifiex_ba_status ba_status)
{
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
	unsigned long flags;

	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
		if (tx_ba_tsr_tbl->ba_status == ba_status) {
			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
					       flags);
			return tx_ba_tsr_tbl;
		}
	}
	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
	return NULL;
}

/*
 * This function handles the command response of delete a block
 * ack request.
 *
 * The function checks the response success status and takes action
 * accordingly (send an add BA request in case of success, or recreate
 * the deleted stream in case of failure, if the add BA was also
 * initiated by us).
 */
int mwifiex_ret_11n_delba(struct mwifiex_private *priv,
			  struct host_cmd_ds_command *resp)
{
	int tid;
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;
	struct host_cmd_ds_11n_delba *del_ba =
		(struct host_cmd_ds_11n_delba *) &resp->params.del_ba;
	uint16_t del_ba_param_set = le16_to_cpu(del_ba->del_ba_param_set);

	tid = del_ba_param_set >> DELBA_TID_POS;
	if (del_ba->del_result == BA_RESULT_SUCCESS) {
		mwifiex_11n_delete_ba_stream_tbl(priv, tid,
				del_ba->peer_mac_addr, TYPE_DELBA_SENT,
				INITIATOR_BIT(del_ba_param_set));

		tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
						BA_STREAM_SETUP_INPROGRESS);
		if (tx_ba_tbl)
			mwifiex_send_addba(priv, tx_ba_tbl->tid,
					   tx_ba_tbl->ra);
	} else { /*
		  * In case of failure, recreate the deleted stream in case
		  * we initiated the ADDBA
		  */
		if (INITIATOR_BIT(del_ba_param_set)) {
			mwifiex_11n_create_tx_ba_stream_tbl(priv,
					del_ba->peer_mac_addr, tid,
					BA_STREAM_SETUP_INPROGRESS);

			tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_status(priv,
					BA_STREAM_SETUP_INPROGRESS);
			if (tx_ba_tbl)
				mwifiex_11n_delete_ba_stream_tbl(priv,
						tx_ba_tbl->tid, tx_ba_tbl->ra,
						TYPE_DELBA_SENT, true);
		}
	}

	return 0;
}

/*
 * This function handles the command response of add a block
 * ack request.
 *
 * Handling includes changing the header fields to CPU formats, checking
 * the response success status and taking actions accordingly (delete the
 * BA stream table in case of failure).
 */
int mwifiex_ret_11n_addba_req(struct mwifiex_private *priv,
			      struct host_cmd_ds_command *resp)
{
	int tid;
	struct host_cmd_ds_11n_addba_rsp *add_ba_rsp =
		(struct host_cmd_ds_11n_addba_rsp *) &resp->params.add_ba_rsp;
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tbl;

	add_ba_rsp->ssn = cpu_to_le16((le16_to_cpu(add_ba_rsp->ssn))
			& SSN_MASK);

	tid = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
		& IEEE80211_ADDBA_PARAM_TID_MASK)
		>> BLOCKACKPARAM_TID_POS;
	if (le16_to_cpu(add_ba_rsp->status_code) == BA_RESULT_SUCCESS) {
		tx_ba_tbl = mwifiex_11n_get_tx_ba_stream_tbl(priv, tid,
						add_ba_rsp->peer_mac_addr);
		if (tx_ba_tbl) {
			dev_dbg(priv->adapter->dev, "info: BA stream complete\n");
			tx_ba_tbl->ba_status = BA_STREAM_SETUP_COMPLETE;
		} else {
			dev_err(priv->adapter->dev, "BA stream not created\n");
		}
	} else {
		mwifiex_11n_delete_ba_stream_tbl(priv, tid,
						add_ba_rsp->peer_mac_addr,
						TYPE_DELBA_SENT, true);
		if (add_ba_rsp->add_rsp_result != BA_RESULT_TIMEOUT)
			priv->aggr_prio_tbl[tid].ampdu_ap =
				BA_STREAM_NOT_ALLOWED;
	}

	return 0;
}

/*
 * This function handles the command response of 11n configuration request.
 *
 * Handling includes changing the header fields into CPU format.
 */
int mwifiex_ret_11n_cfg(struct host_cmd_ds_command *resp,
			struct mwifiex_ds_11n_tx_cfg *tx_cfg)
{
	struct host_cmd_ds_11n_cfg *htcfg = &resp->params.htcfg;

	if (tx_cfg) {
		tx_cfg->tx_htcap = le16_to_cpu(htcfg->ht_tx_cap);
		tx_cfg->tx_htinfo = le16_to_cpu(htcfg->ht_tx_info);
	}
	return 0;
}

/*
 * This function prepares command of reconfigure Tx buffer.
 *
 * Preparation includes -
 *      - Setting command ID, action and proper size
 *      - Setting Tx buffer size (for SET only)
 *      - Ensuring correct endian-ness
 */
int mwifiex_cmd_recfg_tx_buf(struct mwifiex_private *priv,
			     struct host_cmd_ds_command *cmd, int cmd_action,
			     u16 *buf_size)
{
	struct host_cmd_ds_txbuf_cfg *tx_buf = &cmd->params.tx_buf;
	u16 action = (u16) cmd_action;

	cmd->command = cpu_to_le16(HostCmd_CMD_RECONFIGURE_TX_BUFF);
	cmd->size =
		cpu_to_le16(sizeof(struct host_cmd_ds_txbuf_cfg) + S_DS_GEN);
	tx_buf->action = cpu_to_le16(action);
	switch (action) {
	case HostCmd_ACT_GEN_SET:
		dev_dbg(priv->adapter->dev, "cmd: set tx_buf=%d\n", *buf_size);
		tx_buf->buff_size = cpu_to_le16(*buf_size);
		break;
	case HostCmd_ACT_GEN_GET:
	default:
		tx_buf->buff_size = 0;
		break;
	}
	return 0;
}

/*
 * This function prepares command of AMSDU aggregation control.
 *
 * Preparation includes -
 *      - Setting command ID, action and proper size
 *      - Setting AMSDU control parameters (for SET only)
 *      - Ensuring correct endian-ness
 */
int mwifiex_cmd_amsdu_aggr_ctrl(struct host_cmd_ds_command *cmd,
				int cmd_action,
				struct mwifiex_ds_11n_amsdu_aggr_ctrl *aa_ctrl)
{
	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
		&cmd->params.amsdu_aggr_ctrl;
	u16 action = (u16) cmd_action;

	cmd->command = cpu_to_le16(HostCmd_CMD_AMSDU_AGGR_CTRL);
	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_amsdu_aggr_ctrl)
				+ S_DS_GEN);
	amsdu_ctrl->action = cpu_to_le16(action);
	switch (action) {
	case HostCmd_ACT_GEN_SET:
		amsdu_ctrl->enable = cpu_to_le16(aa_ctrl->enable);
		amsdu_ctrl->curr_buf_size = 0;
		break;
	case HostCmd_ACT_GEN_GET:
	default:
		amsdu_ctrl->curr_buf_size = 0;
		break;
	}
	return 0;
}

/*
 * This function handles the command response of AMSDU aggregation
 * control request.
 *
 * Handling includes changing the header fields into CPU format.
 */
int mwifiex_ret_amsdu_aggr_ctrl(struct host_cmd_ds_command *resp,
				struct mwifiex_ds_11n_amsdu_aggr_ctrl
				*amsdu_aggr_ctrl)
{
	struct host_cmd_ds_amsdu_aggr_ctrl *amsdu_ctrl =
		&resp->params.amsdu_aggr_ctrl;

	if (amsdu_aggr_ctrl) {
		amsdu_aggr_ctrl->enable = le16_to_cpu(amsdu_ctrl->enable);
		amsdu_aggr_ctrl->curr_buf_size =
			le16_to_cpu(amsdu_ctrl->curr_buf_size);
	}
	return 0;
}

/*
 * This function prepares 11n configuration command.
 *
 * Preparation includes -
 *      - Setting command ID, action and proper size
 *      - Setting HT Tx capability and HT Tx information fields
 *      - Ensuring correct endian-ness
 */
int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
			struct mwifiex_ds_11n_tx_cfg *txcfg)
{
	struct host_cmd_ds_11n_cfg *htcfg = &cmd->params.htcfg;

	cmd->command = cpu_to_le16(HostCmd_CMD_11N_CFG);
	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_11n_cfg) + S_DS_GEN);
	htcfg->action = cpu_to_le16(cmd_action);
	htcfg->ht_tx_cap = cpu_to_le16(txcfg->tx_htcap);
	htcfg->ht_tx_info = cpu_to_le16(txcfg->tx_htinfo);
	return 0;
}

/*
 * This function appends an 11n TLV to a buffer.
 *
 * Buffer allocation is responsibility of the calling
 * function. No size validation is made here.
 *
 * The function fills up the following sections, if applicable -
 *      - HT capability IE
 *      - HT information IE (with channel list)
 *      - 20/40 BSS Coexistence IE
 *      - HT Extended Capabilities IE
 */
int
mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
			   struct mwifiex_bssdescriptor *bss_desc,
			   u8 **buffer)
{
	struct mwifiex_ie_types_htcap *ht_cap;
	struct mwifiex_ie_types_htinfo *ht_info;
	struct mwifiex_ie_types_chan_list_param_set *chan_list;
	struct mwifiex_ie_types_2040bssco *bss_co_2040;
	struct mwifiex_ie_types_extcap *ext_cap;
	int ret_len = 0;
	struct ieee80211_supported_band *sband;
	u8 radio_type;

	if (!buffer || !*buffer)
		return ret_len;

	radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
	sband = priv->wdev->wiphy->bands[radio_type];

	if (bss_desc->bcn_ht_cap) {
		ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
		memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
		ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
		ht_cap->header.len =
				cpu_to_le16(sizeof(struct ieee80211_ht_cap));
		memcpy((u8 *) ht_cap + sizeof(struct mwifiex_ie_types_header),
		       (u8 *) bss_desc->bcn_ht_cap +
		       sizeof(struct ieee_types_header),
		       le16_to_cpu(ht_cap->header.len));

		mwifiex_fill_cap_info(priv, radio_type, ht_cap);

		*buffer += sizeof(struct mwifiex_ie_types_htcap);
		ret_len += sizeof(struct mwifiex_ie_types_htcap);
	}

	if (bss_desc->bcn_ht_info) {
		if (priv->bss_mode == NL80211_IFTYPE_ADHOC) {
			ht_info = (struct mwifiex_ie_types_htinfo *) *buffer;
			memset(ht_info, 0,
			       sizeof(struct mwifiex_ie_types_htinfo));
			ht_info->header.type =
					cpu_to_le16(WLAN_EID_HT_INFORMATION);
			ht_info->header.len =
				cpu_to_le16(sizeof(struct ieee80211_ht_info));

			memcpy((u8 *) ht_info +
			       sizeof(struct mwifiex_ie_types_header),
			       (u8 *) bss_desc->bcn_ht_info +
			       sizeof(struct ieee_types_header),
			       le16_to_cpu(ht_info->header.len));

			if (!(sband->ht_cap.cap &
					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
				ht_info->ht_info.ht_param &=
					~(IEEE80211_HT_PARAM_CHAN_WIDTH_ANY |
					IEEE80211_HT_PARAM_CHA_SEC_OFFSET);

			*buffer += sizeof(struct mwifiex_ie_types_htinfo);
			ret_len += sizeof(struct mwifiex_ie_types_htinfo);
		}

		chan_list =
			(struct mwifiex_ie_types_chan_list_param_set *) *buffer;
		memset(chan_list, 0,
		       sizeof(struct mwifiex_ie_types_chan_list_param_set));
		chan_list->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
		chan_list->header.len = cpu_to_le16(
			sizeof(struct mwifiex_ie_types_chan_list_param_set) -
			sizeof(struct mwifiex_ie_types_header));
		chan_list->chan_scan_param[0].chan_number =
			bss_desc->bcn_ht_info->control_chan;
		chan_list->chan_scan_param[0].radio_type =
			mwifiex_band_to_radio_type((u8) bss_desc->bss_band);

		if ((sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
			&& (bss_desc->bcn_ht_info->ht_param &
				IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
			SET_SECONDARYCHAN(chan_list->chan_scan_param[0].
					  radio_type,
					  (bss_desc->bcn_ht_info->ht_param &
					  IEEE80211_HT_PARAM_CHA_SEC_OFFSET));

		*buffer += sizeof(struct mwifiex_ie_types_chan_list_param_set);
		ret_len += sizeof(struct mwifiex_ie_types_chan_list_param_set);
	}

	if (bss_desc->bcn_bss_co_2040) {
		bss_co_2040 = (struct mwifiex_ie_types_2040bssco *) *buffer;
		memset(bss_co_2040, 0,
		       sizeof(struct mwifiex_ie_types_2040bssco));
		bss_co_2040->header.type = cpu_to_le16(WLAN_EID_BSS_COEX_2040);
		bss_co_2040->header.len =
		       cpu_to_le16(sizeof(bss_co_2040->bss_co_2040));

		memcpy((u8 *) bss_co_2040 +
		       sizeof(struct mwifiex_ie_types_header),
		       (u8 *) bss_desc->bcn_bss_co_2040 +
		       sizeof(struct ieee_types_header),
		       le16_to_cpu(bss_co_2040->header.len));

		*buffer += sizeof(struct mwifiex_ie_types_2040bssco);
		ret_len += sizeof(struct mwifiex_ie_types_2040bssco);
	}

	if (bss_desc->bcn_ext_cap) {
		ext_cap = (struct mwifiex_ie_types_extcap *) *buffer;
		memset(ext_cap, 0, sizeof(struct mwifiex_ie_types_extcap));
		ext_cap->header.type = cpu_to_le16(WLAN_EID_EXT_CAPABILITY);
		ext_cap->header.len = cpu_to_le16(sizeof(ext_cap->ext_cap));

		memcpy((u8 *) ext_cap +
		       sizeof(struct mwifiex_ie_types_header),
		       (u8 *) bss_desc->bcn_ext_cap +
		       sizeof(struct ieee_types_header),
		       le16_to_cpu(ext_cap->header.len));

		*buffer += sizeof(struct mwifiex_ie_types_extcap);
		ret_len += sizeof(struct mwifiex_ie_types_extcap);
	}

	return ret_len;
}

/*
 * This function reconfigures the Tx buffer size in firmware.
 *
 * This function prepares a firmware command and issues it, if
 * the current Tx buffer size is different from the one requested.
 * Maximum configurable Tx buffer size is limited by the HT capability
 * field value.
 */
void
mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
		   struct mwifiex_bssdescriptor *bss_desc)
{
	u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
	u16 tx_buf, curr_tx_buf_size = 0;

	if (bss_desc->bcn_ht_cap) {
		if (le16_to_cpu(bss_desc->bcn_ht_cap->cap_info) &
				IEEE80211_HT_CAP_MAX_AMSDU)
			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
		else
			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
	}

	tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);

	dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
			max_amsdu, priv->adapter->max_tx_buf_size);

	if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
	if (curr_tx_buf_size != tx_buf)
		mwifiex_send_cmd_async(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
				       HostCmd_ACT_GEN_SET, 0, &tx_buf);
}

/*
 * This function checks if the given pointer is valid entry of
 * Tx BA Stream table.
 */
static int mwifiex_is_tx_ba_stream_ptr_valid(struct mwifiex_private *priv,
				struct mwifiex_tx_ba_stream_tbl *tx_tbl_ptr)
{
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;

	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
		if (tx_ba_tsr_tbl == tx_tbl_ptr)
			return true;
	}

	return false;
}

/*
 * This function deletes the given entry in Tx BA Stream table.
 *
 * The function also performs a validity check on the supplied
 * pointer before trying to delete.
 */
void mwifiex_11n_delete_tx_ba_stream_tbl_entry(struct mwifiex_private *priv,
				struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl)
{
	if (!tx_ba_tsr_tbl &&
			mwifiex_is_tx_ba_stream_ptr_valid(priv, tx_ba_tsr_tbl))
		return;

	dev_dbg(priv->adapter->dev, "info: tx_ba_tsr_tbl %p\n", tx_ba_tsr_tbl);

	list_del(&tx_ba_tsr_tbl->list);

	kfree(tx_ba_tsr_tbl);
}

/*
 * This function deletes all the entries in Tx BA Stream table.
 */
void mwifiex_11n_delete_all_tx_ba_stream_tbl(struct mwifiex_private *priv)
{
	int i;
	struct mwifiex_tx_ba_stream_tbl *del_tbl_ptr, *tmp_node;
	unsigned long flags;

	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
	list_for_each_entry_safe(del_tbl_ptr, tmp_node,
				 &priv->tx_ba_stream_tbl_ptr, list)
		mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, del_tbl_ptr);
	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);

	INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);

	for (i = 0; i < MAX_NUM_TID; ++i)
		priv->aggr_prio_tbl[i].ampdu_ap =
			priv->aggr_prio_tbl[i].ampdu_user;
}

/*
 * This function returns the pointer to an entry in BA Stream
 * table which matches the given RA/TID pair.
 */
struct mwifiex_tx_ba_stream_tbl *
mwifiex_11n_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
				 int tid, u8 *ra)
{
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
	unsigned long flags;

	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
		if ((!memcmp(tx_ba_tsr_tbl->ra, ra, ETH_ALEN))
		    && (tx_ba_tsr_tbl->tid == tid)) {
			spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock,
					       flags);
			return tx_ba_tsr_tbl;
		}
	}
	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
	return NULL;
}

/*
 * This function creates an entry in Tx BA stream table for the
 * given RA/TID pair.
 */
void mwifiex_11n_create_tx_ba_stream_tbl(struct mwifiex_private *priv,
					 u8 *ra, int tid,
					 enum mwifiex_ba_status ba_status)
{
	struct mwifiex_tx_ba_stream_tbl *new_node;
	unsigned long flags;

	if (!mwifiex_11n_get_tx_ba_stream_tbl(priv, tid, ra)) {
		new_node = kzalloc(sizeof(struct mwifiex_tx_ba_stream_tbl),
				   GFP_ATOMIC);
		if (!new_node) {
			dev_err(priv->adapter->dev,
				"%s: failed to alloc new_node\n", __func__);
			return;
		}

		INIT_LIST_HEAD(&new_node->list);

		new_node->tid = tid;
		new_node->ba_status = ba_status;
		memcpy(new_node->ra, ra, ETH_ALEN);

		spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
		list_add_tail(&new_node->list, &priv->tx_ba_stream_tbl_ptr);
		spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
	}
}

/*
 * This function sends an add BA request to the given TID/RA pair.
 */
int mwifiex_send_addba(struct mwifiex_private *priv, int tid, u8 *peer_mac)
{
	struct host_cmd_ds_11n_addba_req add_ba_req;
	static u8 dialog_tok;
	int ret;

	dev_dbg(priv->adapter->dev, "cmd: %s: tid %d\n", __func__, tid);

	add_ba_req.block_ack_param_set = cpu_to_le16(
		(u16) ((tid << BLOCKACKPARAM_TID_POS) |
			 (priv->add_ba_param.
			  tx_win_size << BLOCKACKPARAM_WINSIZE_POS) |
			 IMMEDIATE_BLOCK_ACK));
	add_ba_req.block_ack_tmo = cpu_to_le16((u16)priv->add_ba_param.timeout);

	++dialog_tok;

	if (dialog_tok == 0)
		dialog_tok = 1;

	add_ba_req.dialog_token = dialog_tok;
	memcpy(&add_ba_req.peer_mac_addr, peer_mac, ETH_ALEN);

	/* We don't wait for the response of this command */
	ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_ADDBA_REQ,
				     0, 0, &add_ba_req);

	return ret;
}

/*
 * This function sends a delete BA request to the given TID/RA pair.
 */
int mwifiex_send_delba(struct mwifiex_private *priv, int tid, u8 *peer_mac,
		       int initiator)
{
	struct host_cmd_ds_11n_delba delba;
	int ret;
	uint16_t del_ba_param_set;

	memset(&delba, 0, sizeof(delba));
	delba.del_ba_param_set = cpu_to_le16(tid << DELBA_TID_POS);

	del_ba_param_set = le16_to_cpu(delba.del_ba_param_set);
	if (initiator)
		del_ba_param_set |= IEEE80211_DELBA_PARAM_INITIATOR_MASK;
	else
		del_ba_param_set &= ~IEEE80211_DELBA_PARAM_INITIATOR_MASK;

	memcpy(&delba.peer_mac_addr, peer_mac, ETH_ALEN);

	/* We don't wait for the response of this command */
	ret = mwifiex_send_cmd_async(priv, HostCmd_CMD_11N_DELBA,
				     HostCmd_ACT_GEN_SET, 0, &delba);

	return ret;
}

/*
 * This function handles the command response of a delete BA request.
 */
void mwifiex_11n_delete_ba_stream(struct mwifiex_private *priv, u8 *del_ba)
{
	struct host_cmd_ds_11n_delba *cmd_del_ba =
		(struct host_cmd_ds_11n_delba *) del_ba;
	uint16_t del_ba_param_set = le16_to_cpu(cmd_del_ba->del_ba_param_set);
	int tid;

	tid = del_ba_param_set >> DELBA_TID_POS;

	mwifiex_11n_delete_ba_stream_tbl(priv, tid, cmd_del_ba->peer_mac_addr,
					 TYPE_DELBA_RECEIVE,
					 INITIATOR_BIT(del_ba_param_set));
}

/*
 * This function retrieves the Rx reordering table.
 */
int mwifiex_get_rx_reorder_tbl(struct mwifiex_private *priv,
			       struct mwifiex_ds_rx_reorder_tbl *buf)
{
	int i;
	struct mwifiex_ds_rx_reorder_tbl *rx_reo_tbl = buf;
	struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr;
	int count = 0;
	unsigned long flags;

	spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
	list_for_each_entry(rx_reorder_tbl_ptr, &priv->rx_reorder_tbl_ptr,
			    list) {
		rx_reo_tbl->tid = (u16) rx_reorder_tbl_ptr->tid;
		memcpy(rx_reo_tbl->ta, rx_reorder_tbl_ptr->ta, ETH_ALEN);
		rx_reo_tbl->start_win = rx_reorder_tbl_ptr->start_win;
		rx_reo_tbl->win_size = rx_reorder_tbl_ptr->win_size;
		for (i = 0; i < rx_reorder_tbl_ptr->win_size; ++i) {
			if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
				rx_reo_tbl->buffer[i] = true;
			else
				rx_reo_tbl->buffer[i] = false;
		}
		rx_reo_tbl++;
		count++;

		if (count >= MWIFIEX_MAX_RX_BASTREAM_SUPPORTED)
			break;
	}
	spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);

	return count;
}

/*
 * This function retrieves the Tx BA stream table.
 */
int mwifiex_get_tx_ba_stream_tbl(struct mwifiex_private *priv,
				 struct mwifiex_ds_tx_ba_stream_tbl *buf)
{
	struct mwifiex_tx_ba_stream_tbl *tx_ba_tsr_tbl;
	struct mwifiex_ds_tx_ba_stream_tbl *rx_reo_tbl = buf;
	int count = 0;
	unsigned long flags;

	spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
	list_for_each_entry(tx_ba_tsr_tbl, &priv->tx_ba_stream_tbl_ptr, list) {
		rx_reo_tbl->tid = (u16) tx_ba_tsr_tbl->tid;
		dev_dbg(priv->adapter->dev, "data: %s tid=%d\n",
						__func__, rx_reo_tbl->tid);
		memcpy(rx_reo_tbl->ra, tx_ba_tsr_tbl->ra, ETH_ALEN);
		rx_reo_tbl++;
		count++;
		if (count >= MWIFIEX_MAX_TX_BASTREAM_SUPPORTED)
			break;
	}
	spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);

	return count;
}
OpenPOWER on IntegriCloud