iwl-agn-lib.c 58.6 KB
Newer Older
1
2
3
4
/******************************************************************************
 *
 * GPL LICENSE SUMMARY
 *
Wey-Yi Guy's avatar
Wey-Yi Guy committed
5
 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 *
 * 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.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
29
#include <linux/etherdevice.h>
30
31
32
33
34
35
36
37
38
39
40
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>

#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-agn-hw.h"
#include "iwl-agn.h"
41
#include "iwl-sta.h"
42
#include "iwl-trans.h"
43
#include "iwl-shared.h"
44

Wey-Yi Guy's avatar
Wey-Yi Guy committed
45
static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp)
46
47
48
49
50
{
	return le32_to_cpup((__le32 *)&tx_resp->status +
			    tx_resp->frame_count) & MAX_SN;
}

51
52
53
54
55
56
static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status)
{
	status &= TX_STATUS_MSK;

	switch (status) {
	case TX_STATUS_POSTPONE_DELAY:
57
		priv->reply_tx_stats.pp_delay++;
58
59
		break;
	case TX_STATUS_POSTPONE_FEW_BYTES:
60
		priv->reply_tx_stats.pp_few_bytes++;
61
62
		break;
	case TX_STATUS_POSTPONE_BT_PRIO:
63
		priv->reply_tx_stats.pp_bt_prio++;
64
65
		break;
	case TX_STATUS_POSTPONE_QUIET_PERIOD:
66
		priv->reply_tx_stats.pp_quiet_period++;
67
68
		break;
	case TX_STATUS_POSTPONE_CALC_TTAK:
69
		priv->reply_tx_stats.pp_calc_ttak++;
70
71
		break;
	case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY:
72
		priv->reply_tx_stats.int_crossed_retry++;
73
74
		break;
	case TX_STATUS_FAIL_SHORT_LIMIT:
75
		priv->reply_tx_stats.short_limit++;
76
77
		break;
	case TX_STATUS_FAIL_LONG_LIMIT:
78
		priv->reply_tx_stats.long_limit++;
79
80
		break;
	case TX_STATUS_FAIL_FIFO_UNDERRUN:
81
		priv->reply_tx_stats.fifo_underrun++;
82
83
		break;
	case TX_STATUS_FAIL_DRAIN_FLOW:
84
		priv->reply_tx_stats.drain_flow++;
85
86
		break;
	case TX_STATUS_FAIL_RFKILL_FLUSH:
87
		priv->reply_tx_stats.rfkill_flush++;
88
89
		break;
	case TX_STATUS_FAIL_LIFE_EXPIRE:
90
		priv->reply_tx_stats.life_expire++;
91
92
		break;
	case TX_STATUS_FAIL_DEST_PS:
93
		priv->reply_tx_stats.dest_ps++;
94
95
		break;
	case TX_STATUS_FAIL_HOST_ABORTED:
96
		priv->reply_tx_stats.host_abort++;
97
98
		break;
	case TX_STATUS_FAIL_BT_RETRY:
99
		priv->reply_tx_stats.bt_retry++;
100
101
		break;
	case TX_STATUS_FAIL_STA_INVALID:
102
		priv->reply_tx_stats.sta_invalid++;
103
104
		break;
	case TX_STATUS_FAIL_FRAG_DROPPED:
105
		priv->reply_tx_stats.frag_drop++;
106
107
		break;
	case TX_STATUS_FAIL_TID_DISABLE:
108
		priv->reply_tx_stats.tid_disable++;
109
110
		break;
	case TX_STATUS_FAIL_FIFO_FLUSHED:
111
		priv->reply_tx_stats.fifo_flush++;
112
113
		break;
	case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL:
114
		priv->reply_tx_stats.insuff_cf_poll++;
115
		break;
116
	case TX_STATUS_FAIL_PASSIVE_NO_RX:
117
		priv->reply_tx_stats.fail_hw_drop++;
118
		break;
119
	case TX_STATUS_FAIL_NO_BEACON_ON_RADAR:
120
		priv->reply_tx_stats.sta_color_mismatch++;
121
122
		break;
	default:
123
		priv->reply_tx_stats.unknown++;
124
125
126
127
		break;
	}
}

128
129
130
131
132
133
static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status)
{
	status &= AGG_TX_STATUS_MSK;

	switch (status) {
	case AGG_TX_STATE_UNDERRUN_MSK:
134
		priv->reply_agg_tx_stats.underrun++;
135
136
		break;
	case AGG_TX_STATE_BT_PRIO_MSK:
137
		priv->reply_agg_tx_stats.bt_prio++;
138
139
		break;
	case AGG_TX_STATE_FEW_BYTES_MSK:
140
		priv->reply_agg_tx_stats.few_bytes++;
141
142
		break;
	case AGG_TX_STATE_ABORT_MSK:
143
		priv->reply_agg_tx_stats.abort++;
144
145
		break;
	case AGG_TX_STATE_LAST_SENT_TTL_MSK:
146
		priv->reply_agg_tx_stats.last_sent_ttl++;
147
148
		break;
	case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK:
149
		priv->reply_agg_tx_stats.last_sent_try++;
150
151
		break;
	case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK:
152
		priv->reply_agg_tx_stats.last_sent_bt_kill++;
153
154
		break;
	case AGG_TX_STATE_SCD_QUERY_MSK:
155
		priv->reply_agg_tx_stats.scd_query++;
156
157
		break;
	case AGG_TX_STATE_TEST_BAD_CRC32_MSK:
158
		priv->reply_agg_tx_stats.bad_crc32++;
159
160
		break;
	case AGG_TX_STATE_RESPONSE_MSK:
161
		priv->reply_agg_tx_stats.response++;
162
163
		break;
	case AGG_TX_STATE_DUMP_TX_MSK:
164
		priv->reply_agg_tx_stats.dump_tx++;
165
166
		break;
	case AGG_TX_STATE_DELAY_TX_MSK:
167
		priv->reply_agg_tx_stats.delay_tx++;
168
169
		break;
	default:
170
		priv->reply_agg_tx_stats.unknown++;
171
172
173
174
		break;
	}
}

Wey-Yi Guy's avatar
Wey-Yi Guy committed
175
176
static void iwlagn_set_tx_status(struct iwl_priv *priv,
				 struct ieee80211_tx_info *info,
177
				 struct iwl_rxon_context *ctx,
Wey-Yi Guy's avatar
Wey-Yi Guy committed
178
				 struct iwlagn_tx_resp *tx_resp,
Wey-Yi Guy's avatar
Wey-Yi Guy committed
179
180
181
182
183
184
185
186
187
188
				 int txq_id, bool is_agg)
{
	u16  status = le16_to_cpu(tx_resp->status.status);

	info->status.rates[0].count = tx_resp->failure_frame + 1;
	if (is_agg)
		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
	info->flags |= iwl_tx_status_to_mac80211(status);
	iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
				    info);
189
190
	if (!iwl_is_tx_success(status))
		iwlagn_count_tx_err_status(priv, status);
Wey-Yi Guy's avatar
Wey-Yi Guy committed
191

192
193
194
195
196
197
198
	if (status == TX_STATUS_FAIL_PASSIVE_NO_RX &&
	    iwl_is_associated_ctx(ctx) && ctx->vif &&
	    ctx->vif->type == NL80211_IFTYPE_STATION) {
		ctx->last_tx_rejected = true;
		iwl_stop_queue(priv, &priv->txq[txq_id]);
	}

Wey-Yi Guy's avatar
Wey-Yi Guy committed
199
200
201
202
203
204
205
206
	IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags "
			   "0x%x retries %d\n",
			   txq_id,
			   iwl_get_tx_fail_reason(status), status,
			   le32_to_cpu(tx_resp->rate_n_flags),
			   tx_resp->failure_frame);
}

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
#ifdef CONFIG_IWLWIFI_DEBUG
#define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x

const char *iwl_get_agg_tx_fail_reason(u16 status)
{
	status &= AGG_TX_STATUS_MSK;
	switch (status) {
	case AGG_TX_STATE_TRANSMITTED:
		return "SUCCESS";
		AGG_TX_STATE_FAIL(UNDERRUN_MSK);
		AGG_TX_STATE_FAIL(BT_PRIO_MSK);
		AGG_TX_STATE_FAIL(FEW_BYTES_MSK);
		AGG_TX_STATE_FAIL(ABORT_MSK);
		AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK);
		AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK);
		AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK);
		AGG_TX_STATE_FAIL(SCD_QUERY_MSK);
		AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK);
		AGG_TX_STATE_FAIL(RESPONSE_MSK);
		AGG_TX_STATE_FAIL(DUMP_TX_MSK);
		AGG_TX_STATE_FAIL(DELAY_TX_MSK);
	}

	return "UNKNOWN";
}
#endif /* CONFIG_IWLWIFI_DEBUG */

234
235
static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv,
				      struct iwl_ht_agg *agg,
Wey-Yi Guy's avatar
Wey-Yi Guy committed
236
				      struct iwlagn_tx_resp *tx_resp,
237
238
239
240
241
242
243
244
245
246
247
248
249
				      int txq_id, u16 start_idx)
{
	u16 status;
	struct agg_tx_status *frame_status = &tx_resp->status;
	struct ieee80211_hdr *hdr = NULL;
	int i, sh, idx;
	u16 seq;

	if (agg->wait_for_ba)
		IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");

	agg->frame_count = tx_resp->frame_count;
	agg->start_idx = start_idx;
Wey-Yi Guy's avatar
Wey-Yi Guy committed
250
	agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
251
252
253
254
	agg->bitmap = 0;

	/* # frames attempted by Tx command */
	if (agg->frame_count == 1) {
255
256
		struct iwl_tx_info *txb;

257
258
259
260
261
		/* Only one frame was attempted; no block-ack will arrive */
		idx = start_idx;

		IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
				   agg->frame_count, agg->start_idx, idx);
262
263
264
		txb = &priv->txq[txq_id].txb[idx];
		iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(txb->skb),
				     txb->ctx, tx_resp, txq_id, true);
265
266
267
268
		agg->wait_for_ba = 0;
	} else {
		/* Two or more frames were attempted; expect block-ack */
		u64 bitmap = 0;
269
270
271
272
273
274

		/*
		 * Start is the lowest frame sent. It may not be the first
		 * frame in the batch; we figure this out dynamically during
		 * the following loop.
		 */
275
276
277
278
279
280
281
282
283
284
		int start = agg->start_idx;

		/* Construct bit-map of pending frames within Tx window */
		for (i = 0; i < agg->frame_count; i++) {
			u16 sc;
			status = le16_to_cpu(frame_status[i].status);
			seq  = le16_to_cpu(frame_status[i].sequence);
			idx = SEQ_TO_INDEX(seq);
			txq_id = SEQ_TO_QUEUE(seq);

285
286
287
			if (status & AGG_TX_STATUS_MSK)
				iwlagn_count_agg_tx_err_status(priv, status);

288
289
290
291
292
293
			if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
				      AGG_TX_STATE_ABORT_MSK))
				continue;

			IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
					   agg->frame_count, txq_id, idx);
294
295
296
297
298
			IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), "
					   "try-count (0x%08x)\n",
					   iwl_get_agg_tx_fail_reason(status),
					   status & AGG_TX_STATUS_MSK,
					   status & AGG_TX_TRY_MSK);
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320

			hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
			if (!hdr) {
				IWL_ERR(priv,
					"BUG_ON idx doesn't point to valid skb"
					" idx=%d, txq_id=%d\n", idx, txq_id);
				return -1;
			}

			sc = le16_to_cpu(hdr->seq_ctrl);
			if (idx != (SEQ_TO_SN(sc) & 0xff)) {
				IWL_ERR(priv,
					"BUG_ON idx doesn't match seq control"
					" idx=%d, seq_idx=%d, seq=%d\n",
					  idx, SEQ_TO_SN(sc),
					  hdr->seq_ctrl);
				return -1;
			}

			IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
					   i, idx, SEQ_TO_SN(sc));

321
322
323
324
325
326
327
328
329
			/*
			 * sh -> how many frames ahead of the starting frame is
			 * the current one?
			 *
			 * Note that all frames sent in the batch must be in a
			 * 64-frame window, so this number should be in [0,63].
			 * If outside of this window, then we've found a new
			 * "first" frame in the batch and need to change start.
			 */
330
			sh = idx - start;
331
332
333
334
335
336
337
338
339
340

			/*
			 * If >= 64, out of window. start must be at the front
			 * of the circular buffer, idx must be near the end of
			 * the buffer, and idx is the new "first" frame. Shift
			 * the indices around.
			 */
			if (sh >= 64) {
				/* Shift bitmap by start - idx, wrapped */
				sh = 0x100 - idx + start;
341
				bitmap = bitmap << sh;
342
				/* Now idx is the new start so sh = 0 */
343
344
				sh = 0;
				start = idx;
345
346
347
348
349
350
351
352
353
354
355
356
			/*
			 * If <= -64 then wraps the 256-pkt circular buffer
			 * (e.g., start = 255 and idx = 0, sh should be 1)
			 */
			} else if (sh <= -64) {
				sh  = 0x100 - start + idx;
			/*
			 * If < 0 but > -64, out of window. idx is before start
			 * but not wrapped. Shift the indices around.
			 */
			} else if (sh < 0) {
				/* Shift by how far start is ahead of idx */
357
358
				sh = start - idx;
				bitmap = bitmap << sh;
359
360
				/* Now idx is the new start so sh = 0 */
				start = idx;
361
362
				sh = 0;
			}
363
			/* Sequence number start + sh was sent in this batch */
364
365
366
367
368
			bitmap |= 1ULL << sh;
			IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
					   start, (unsigned long long)bitmap);
		}

369
370
371
372
		/*
		 * Store the bitmap and possibly the new start, if we wrapped
		 * the buffer above
		 */
373
374
375
376
377
378
379
380
381
382
383
384
		agg->bitmap = bitmap;
		agg->start_idx = start;
		IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
				   agg->frame_count, agg->start_idx,
				   (unsigned long long)agg->bitmap);

		if (bitmap)
			agg->wait_for_ba = 1;
	}
	return 0;
}

385
386
387
388
void iwl_check_abort_status(struct iwl_priv *priv,
			    u8 frame_count, u32 status)
{
	if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) {
389
		IWL_ERR(priv, "Tx flush command to flush out all frames\n");
390
		if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
391
			queue_work(priv->shrd->workqueue, &priv->tx_flush);
392
393
394
	}
}

395
void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
396
397
398
399
400
401
402
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
	int txq_id = SEQ_TO_QUEUE(sequence);
	int index = SEQ_TO_INDEX(sequence);
	struct iwl_tx_queue *txq = &priv->txq[txq_id];
	struct ieee80211_tx_info *info;
Wey-Yi Guy's avatar
Wey-Yi Guy committed
403
	struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
Johannes Berg's avatar
Johannes Berg committed
404
	struct ieee80211_hdr *hdr;
405
406
	struct iwl_tx_info *txb;
	u32 status = le16_to_cpu(tx_resp->status.status);
407
408
409
	int tid;
	int sta_id;
	int freed;
410
	unsigned long flags;
411
412

	if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
413
414
415
		IWL_ERR(priv, "%s: Read index for DMA queue txq_id (%d) "
			  "index %d is out of range [0-%d] %d %d\n", __func__,
			  txq_id, index, txq->q.n_bd, txq->q.write_ptr,
416
417
418
419
			  txq->q.read_ptr);
		return;
	}

420
	txq->time_stamp = jiffies;
421
422
	txb = &txq->txb[txq->q.read_ptr];
	info = IEEE80211_SKB_CB(txb->skb);
423
424
	memset(&info->status, 0, sizeof(info->status));

Wey-Yi Guy's avatar
Wey-Yi Guy committed
425
426
427
428
	tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >>
		IWLAGN_TX_RES_TID_POS;
	sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >>
		IWLAGN_TX_RES_RA_POS;
429

430
	spin_lock_irqsave(&priv->shrd->sta_lock, flags);
Johannes Berg's avatar
Johannes Berg committed
431
432
433
434
435

	hdr = (void *)txb->skb->data;
	if (!ieee80211_is_data_qos(hdr->frame_control))
		priv->last_seq_ctl = tx_resp->seq_ctl;

436
437
	if (txq->sched_retry) {
		const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp);
438
		struct iwl_ht_agg *agg;
439
440

		agg = &priv->stations[sta_id].tid[tid].agg;
441
442
443
444
445
		/*
		 * If the BT kill count is non-zero, we'll get this
		 * notification again.
		 */
		if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 &&
446
447
		    priv->cfg->bt_params &&
		    priv->cfg->bt_params->advanced_bt_coexist) {
448
			IWL_DEBUG_COEX(priv, "receive reply tx with bt_kill\n");
449
		}
450
451
452
453
454
455
456
457
458
459
460
461
		iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);

		/* check if BAR is needed */
		if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status))
			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;

		if (txq->q.read_ptr != (scd_ssn & 0xff)) {
			index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
			IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim "
					"scd_ssn=%d idx=%d txq=%d swq=%d\n",
					scd_ssn , index, txq_id, txq->swq_id);

462
			freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
463
464
465
466
			iwl_free_tfds_in_queue(priv, sta_id, tid, freed);

			if (priv->mac80211_registered &&
			    (iwl_queue_space(&txq->q) > txq->q.low_mark) &&
467
			    (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
468
				iwl_wake_queue(priv, txq);
469
470
		}
	} else {
471
472
		iwlagn_set_tx_status(priv, info, txb->ctx, tx_resp,
				     txq_id, false);
473
		freed = iwlagn_tx_queue_reclaim(priv, txq_id, index);
474
475
476
		iwl_free_tfds_in_queue(priv, sta_id, tid, freed);

		if (priv->mac80211_registered &&
477
478
		    iwl_queue_space(&txq->q) > txq->q.low_mark &&
		    status != TX_STATUS_FAIL_PASSIVE_NO_RX)
479
			iwl_wake_queue(priv, txq);
480
481
	}

482
	iwlagn_txq_check_empty(priv, sta_id, tid, txq_id);
483

484
	iwl_check_abort_status(priv, tx_resp->frame_count, status);
485
	spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
486
487
488
489
490
491
492
493
494
495
}

int iwlagn_hw_valid_rtc_data_addr(u32 addr)
{
	return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
		(addr < IWLAGN_RTC_DATA_UPPER_BOUND);
}

int iwlagn_send_tx_power(struct iwl_priv *priv)
{
496
	struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
497
498
	u8 tx_ant_cfg_cmd;

499
	if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->shrd->status),
500
501
502
		      "TX Power requested while scanning!\n"))
		return -EAGAIN;

503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
	/* half dBm need to multiply */
	tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);

	if (priv->tx_power_lmt_in_half_dbm &&
	    priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
		/*
		 * For the newer devices which using enhanced/extend tx power
		 * table in EEPROM, the format is in half dBm. driver need to
		 * convert to dBm format before report to mac80211.
		 * By doing so, there is a possibility of 1/2 dBm resolution
		 * lost. driver will perform "round-up" operation before
		 * reporting, but it will cause 1/2 dBm tx power over the
		 * regulatory limit. Perform the checking here, if the
		 * "tx_power_user_lmt" is higher than EEPROM value (in
		 * half-dBm format), lower the tx power based on EEPROM
		 */
		tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
	}
521
522
	tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
	tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
523
524
525
526
527
528

	if (IWL_UCODE_API(priv->ucode_ver) == 1)
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
	else
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;

529
	return iwl_trans_send_cmd_pdu(trans(priv), tx_ant_cfg_cmd, CMD_SYNC,
530
			sizeof(tx_power_cmd), &tx_power_cmd);
531
532
533
534
}

void iwlagn_temperature(struct iwl_priv *priv)
{
535
	/* store temperature from correct statistics (in Celsius) */
536
	priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
537
538
539
540
541
542
543
544
545
546
547
548
	iwl_tt_handler(priv);
}

u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
{
	struct iwl_eeprom_calib_hdr {
		u8 version;
		u8 pa_type;
		u16 voltage;
	} *hdr;

	hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
549
							EEPROM_CALIB_ALL);
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
	return hdr->version;

}

/*
 * EEPROM
 */
static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
{
	u16 offset = 0;

	if ((address & INDIRECT_ADDRESS) == 0)
		return address;

	switch (address & INDIRECT_TYPE_MSK) {
	case INDIRECT_HOST:
566
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
567
568
		break;
	case INDIRECT_GENERAL:
569
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
570
571
		break;
	case INDIRECT_REGULATORY:
572
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
573
		break;
574
575
576
577
578
579
	case INDIRECT_TXP_LIMIT:
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
		break;
	case INDIRECT_TXP_LIMIT_SIZE:
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
		break;
580
	case INDIRECT_CALIBRATION:
581
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
582
583
		break;
	case INDIRECT_PROCESS_ADJST:
584
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
585
586
		break;
	case INDIRECT_OTHERS:
587
		offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
588
589
590
591
592
593
594
595
596
597
598
		break;
	default:
		IWL_ERR(priv, "illegal indirect type: 0x%X\n",
		address & INDIRECT_TYPE_MSK);
		break;
	}

	/* translate the offset from words to byte */
	return (address & ADDRESS_MSK) + (offset << 1);
}

599
const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
600
601
{
	u32 address = eeprom_indirect_address(priv, offset);
602
	BUG_ON(address >= priv->cfg->base_params->eeprom_size);
603
604
	return &priv->eeprom[address];
}
605
606
607
608

struct iwl_mod_params iwlagn_mod_params = {
	.amsdu_size_8K = 1,
	.restart_fw = 1,
609
	.plcp_check = true,
610
	.bt_coex_active = true,
611
	.no_sleep_autoadjust = true,
612
	.power_level = IWL_POWER_INDEX_1,
613
	.bt_ch_announce = true,
614
	.wanted_ucode_alternative = 1,
615
	.auto_agg = true,
616
617
	/* the rest are 0 by default */
};
618

619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
{
	int idx = 0;
	int band_offset = 0;

	/* HT rate format: mac80211 wants an MCS number, which is just LSB */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);
		return idx;
	/* Legacy rate format, search for match in table */
	} else {
		if (band == IEEE80211_BAND_5GHZ)
			band_offset = IWL_FIRST_OFDM_RATE;
		for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx - band_offset;
	}

	return -1;
}

640
static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
641
642
643
					   struct ieee80211_vif *vif,
					   enum ieee80211_band band,
					   struct iwl_scan_channel *scan_ch)
644
645
646
647
{
	const struct ieee80211_supported_band *sband;
	u16 passive_dwell = 0;
	u16 active_dwell = 0;
Abhijeet Kolekar's avatar
Abhijeet Kolekar committed
648
	int added = 0;
649
650
651
652
653
654
655
656
657
	u16 channel = 0;

	sband = iwl_get_hw_mode(priv, band);
	if (!sband) {
		IWL_ERR(priv, "invalid band\n");
		return added;
	}

	active_dwell = iwl_get_active_dwell_time(priv, band, 0);
658
	passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
659
660
661
662

	if (passive_dwell <= active_dwell)
		passive_dwell = active_dwell + 1;

Abhijeet Kolekar's avatar
Abhijeet Kolekar committed
663
	channel = iwl_get_single_channel_number(priv, band);
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
	if (channel) {
		scan_ch->channel = cpu_to_le16(channel);
		scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
		scan_ch->active_dwell = cpu_to_le16(active_dwell);
		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
		/* Set txpower levels to defaults */
		scan_ch->dsp_atten = 110;
		if (band == IEEE80211_BAND_5GHZ)
			scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
		else
			scan_ch->tx_gain = ((1 << 5) | (5 << 3));
		added++;
	} else
		IWL_ERR(priv, "no valid channel found\n");
	return added;
}

static int iwl_get_channels_for_scan(struct iwl_priv *priv,
682
				     struct ieee80211_vif *vif,
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
				     enum ieee80211_band band,
				     u8 is_active, u8 n_probes,
				     struct iwl_scan_channel *scan_ch)
{
	struct ieee80211_channel *chan;
	const struct ieee80211_supported_band *sband;
	const struct iwl_channel_info *ch_info;
	u16 passive_dwell = 0;
	u16 active_dwell = 0;
	int added, i;
	u16 channel;

	sband = iwl_get_hw_mode(priv, band);
	if (!sband)
		return 0;

	active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
700
	passive_dwell = iwl_get_passive_dwell_time(priv, band, vif);
701
702
703
704
705
706
707
708
709
710

	if (passive_dwell <= active_dwell)
		passive_dwell = active_dwell + 1;

	for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
		chan = priv->scan_request->channels[i];

		if (chan->band != band)
			continue;

711
		channel = chan->hw_value;
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
		scan_ch->channel = cpu_to_le16(channel);

		ch_info = iwl_get_channel_info(priv, band, channel);
		if (!is_channel_valid(ch_info)) {
			IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
					channel);
			continue;
		}

		if (!is_active || is_channel_passive(ch_info) ||
		    (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
			scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
		else
			scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;

		if (n_probes)
			scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);

		scan_ch->active_dwell = cpu_to_le16(active_dwell);
		scan_ch->passive_dwell = cpu_to_le16(passive_dwell);

		/* Set txpower levels to defaults */
		scan_ch->dsp_atten = 110;

		/* NOTE: if we were doing 6Mb OFDM for scans we'd use
		 * power level:
		 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
		 */
		if (band == IEEE80211_BAND_5GHZ)
			scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
		else
			scan_ch->tx_gain = ((1 << 5) | (5 << 3));

		IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
			       channel, le32_to_cpu(scan_ch->type),
			       (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
				"ACTIVE" : "PASSIVE",
			       (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
			       active_dwell : passive_dwell);

		scan_ch++;
		added++;
	}

	IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
	return added;
}

760
int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
761
762
763
{
	struct iwl_host_cmd cmd = {
		.id = REPLY_SCAN_CMD,
764
		.len = { sizeof(struct iwl_scan_cmd), },
765
		.flags = CMD_SYNC,
766
767
	};
	struct iwl_scan_cmd *scan;
768
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
769
770
771
772
773
	u32 rate_flags = 0;
	u16 cmd_len;
	u16 rx_chain = 0;
	enum ieee80211_band band;
	u8 n_probes = 0;
774
	u8 rx_ant = hw_params(priv).valid_rx_ant;
775
776
777
778
	u8 rate;
	bool is_active = false;
	int  chan_mod;
	u8 active_chains;
779
	u8 scan_tx_antennas = hw_params(priv).valid_tx_ant;
780
781
	int ret;

782
	lockdep_assert_held(&priv->shrd->mutex);
783

784
785
786
	if (vif)
		ctx = iwl_rxon_ctx_from_vif(vif);

787
788
789
790
791
792
	if (!priv->scan_cmd) {
		priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
					 IWL_MAX_SCAN_SIZE, GFP_KERNEL);
		if (!priv->scan_cmd) {
			IWL_DEBUG_SCAN(priv,
				       "fail to allocate memory for scan\n");
793
			return -ENOMEM;
794
795
796
797
798
799
800
801
		}
	}
	scan = priv->scan_cmd;
	memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);

	scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
	scan->quiet_time = IWL_ACTIVE_QUIET_TIME;

802
	if (priv->scan_type != IWL_SCAN_ROC &&
Johannes Berg's avatar
Johannes Berg committed
803
	    iwl_is_any_associated(priv)) {
804
805
806
807
808
809
		u16 interval = 0;
		u32 extra;
		u32 suspend_time = 100;
		u32 scan_suspend_time = 100;

		IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
Johannes Berg's avatar
Johannes Berg committed
810
		switch (priv->scan_type) {
811
		case IWL_SCAN_ROC:
Johannes Berg's avatar
Johannes Berg committed
812
813
814
			WARN_ON(1);
			break;
		case IWL_SCAN_RADIO_RESET:
815
			interval = 0;
Johannes Berg's avatar
Johannes Berg committed
816
817
			break;
		case IWL_SCAN_NORMAL:
818
			interval = vif->bss_conf.beacon_int;
Johannes Berg's avatar
Johannes Berg committed
819
820
			break;
		}
821
822
823
824
825
826
827
828
829
830
831
832

		scan->suspend_time = 0;
		scan->max_out_time = cpu_to_le32(200 * 1024);
		if (!interval)
			interval = suspend_time;

		extra = (suspend_time / interval) << 22;
		scan_suspend_time = (extra |
		    ((suspend_time % interval) * 1024));
		scan->suspend_time = cpu_to_le32(scan_suspend_time);
		IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
			       scan_suspend_time, interval);
833
	} else if (priv->scan_type == IWL_SCAN_ROC) {
Johannes Berg's avatar
Johannes Berg committed
834
		scan->suspend_time = 0;
835
836
837
		scan->max_out_time = 0;
		scan->quiet_time = 0;
		scan->quiet_plcp_th = 0;
838
839
	}

Johannes Berg's avatar
Johannes Berg committed
840
841
	switch (priv->scan_type) {
	case IWL_SCAN_RADIO_RESET:
842
		IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
Johannes Berg's avatar
Johannes Berg committed
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
		break;
	case IWL_SCAN_NORMAL:
		if (priv->scan_request->n_ssids) {
			int i, p = 0;
			IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
			for (i = 0; i < priv->scan_request->n_ssids; i++) {
				/* always does wildcard anyway */
				if (!priv->scan_request->ssids[i].ssid_len)
					continue;
				scan->direct_scan[p].id = WLAN_EID_SSID;
				scan->direct_scan[p].len =
					priv->scan_request->ssids[i].ssid_len;
				memcpy(scan->direct_scan[p].ssid,
				       priv->scan_request->ssids[i].ssid,
				       priv->scan_request->ssids[i].ssid_len);
				n_probes++;
				p++;
			}
			is_active = true;
		} else
			IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
		break;
865
866
	case IWL_SCAN_ROC:
		IWL_DEBUG_SCAN(priv, "Start ROC scan.\n");
Johannes Berg's avatar
Johannes Berg committed
867
868
		break;
	}
869
870

	scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
871
	scan->tx_cmd.sta_id = ctx->bcast_sta_id;
872
873
874
875
876
	scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;

	switch (priv->scan_band) {
	case IEEE80211_BAND_2GHZ:
		scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
877
878
879
		chan_mod = le32_to_cpu(
			priv->contexts[IWL_RXON_CTX_BSS].active.flags &
						RXON_FLG_CHANNEL_MODE_MSK)
880
881
882
883
884
885
886
				       >> RXON_FLG_CHANNEL_MODE_POS;
		if (chan_mod == CHANNEL_MODE_PURE_40) {
			rate = IWL_RATE_6M_PLCP;
		} else {
			rate = IWL_RATE_1M_PLCP;
			rate_flags = RATE_MCS_CCK_MSK;
		}
887
888
889
890
		/*
		 * Internal scans are passive, so we can indiscriminately set
		 * the BT ignore flag on 2.4 GHz since it applies to TX only.
		 */
891
892
		if (priv->cfg->bt_params &&
		    priv->cfg->bt_params->advanced_bt_coexist)
893
			scan->tx_cmd.tx_flags |= TX_CMD_FLG_IGNORE_BT;
894
895
896
897
898
		break;
	case IEEE80211_BAND_5GHZ:
		rate = IWL_RATE_6M_PLCP;
		break;
	default:
899
900
		IWL_WARN(priv, "Invalid scan band\n");
		return -EIO;
901
902
	}

903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
	/*
	 * If active scanning is requested but a certain channel is
	 * marked passive, we can do active scanning if we detect
	 * transmissions.
	 *
	 * There is an issue with some firmware versions that triggers
	 * a sysassert on a "good CRC threshold" of zero (== disabled),
	 * on a radar channel even though this means that we should NOT
	 * send probes.
	 *
	 * The "good CRC threshold" is the number of frames that we
	 * need to receive during our dwell time on a channel before
	 * sending out probes -- setting this to a huge value will
	 * mean we never reach it, but at the same time work around
	 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
	 * here instead of IWL_GOOD_CRC_TH_DISABLED.
919
920
921
922
	 *
	 * This was fixed in later versions along with some other
	 * scan changes, and the threshold behaves as a flag in those
	 * versions.
923
	 */
924
925
926
927
928
929
	if (priv->new_scan_threshold_behaviour)
		scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
						IWL_GOOD_CRC_TH_DISABLED;
	else
		scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
						IWL_GOOD_CRC_TH_NEVER;
930

931
932
	band = priv->scan_band;

933
934
	if (priv->cfg->scan_rx_antennas[band])
		rx_ant = priv->cfg->scan_rx_antennas[band];
935

936
937
938
939
940
	if (band == IEEE80211_BAND_2GHZ &&
	    priv->cfg->bt_params &&
	    priv->cfg->bt_params->advanced_bt_coexist) {
		/* transmit 2.4 GHz probes only on first antenna */
		scan_tx_antennas = first_antenna(scan_tx_antennas);
941
942
	}

943
944
	priv->scan_tx_ant[band] = iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band],
						    scan_tx_antennas);
945
946
947
948
	rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
	scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);

	/* In power save mode use one chain, otherwise use all chains */
949
	if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
950
951
952
953
954
955
956
957
958
959
960
		/* rx_ant has been set to all valid chains previously */
		active_chains = rx_ant &
				((u8)(priv->chain_noise_data.active_chains));
		if (!active_chains)
			active_chains = rx_ant;

		IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
				priv->chain_noise_data.active_chains);

		rx_ant = first_antenna(active_chains);
	}
961
962
963
	if (priv->cfg->bt_params &&
	    priv->cfg->bt_params->advanced_bt_coexist &&
	    priv->bt_full_concurrent) {
964
965
966
967
		/* operated as 1x1 in full concurrency mode */
		rx_ant = first_antenna(rx_ant);
	}

968
	/* MIMO is not used here, but value is required */
969
970
	rx_chain |=
		hw_params(priv).valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
971
972
973
974
	rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
	rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
	rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
	scan->rx_chain = cpu_to_le16(rx_chain);
Johannes Berg's avatar
Johannes Berg committed
975
976
	switch (priv->scan_type) {
	case IWL_SCAN_NORMAL:
977
978
		cmd_len = iwl_fill_probe_req(priv,
					(struct ieee80211_mgmt *)scan->data,
979
					vif->addr,
980
981
982
					priv->scan_request->ie,
					priv->scan_request->ie_len,
					IWL_MAX_SCAN_SIZE - sizeof(*scan));
Johannes Berg's avatar
Johannes Berg committed
983
984
		break;
	case IWL_SCAN_RADIO_RESET:
985
	case IWL_SCAN_ROC:
986
		/* use bcast addr, will not be transmitted but must be valid */
987
988
		cmd_len = iwl_fill_probe_req(priv,
					(struct ieee80211_mgmt *)scan->data,
989
					iwl_bcast_addr, NULL, 0,
990
					IWL_MAX_SCAN_SIZE - sizeof(*scan));
Johannes Berg's avatar
Johannes Berg committed
991
992
993
		break;
	default:
		BUG();
994
995
996
997
998
999
	}
	scan->tx_cmd.len = cpu_to_le16(cmd_len);

	scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
			       RXON_FILTER_BCON_AWARE_MSK);

Johannes Berg's avatar
Johannes Berg committed
1000
1001
	switch (priv->scan_type) {
	case IWL_SCAN_RADIO_RESET:
1002
		scan->channel_count =
1003
			iwl_get_single_channel_for_scan(priv, vif, band,
Johannes Berg's avatar
Johannes Berg committed
1004
1005
1006
				(void *)&scan->data[cmd_len]);
		break;
	case IWL_SCAN_NORMAL:
1007
		scan->channel_count =
1008
			iwl_get_channels_for_scan(priv, vif, band,
1009
				is_active, n_probes,
Johannes Berg's avatar
Johannes Berg committed
1010
1011
				(void *)&scan->data[cmd_len]);
		break;
1012
	case IWL_SCAN_ROC: {
Johannes Berg's avatar
Johannes Berg committed
1013
1014
1015
1016
1017
		struct iwl_scan_channel *scan_ch;

		scan->channel_count = 1;

		scan_ch = (void *)&scan->data[cmd_len];
1018
		scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
Johannes Berg's avatar
Johannes Berg committed
1019
		scan_ch->channel =
1020
			cpu_to_le16(priv->hw_roc_channel->hw_value);
Johannes Berg's avatar
Johannes Berg committed
1021
		scan_ch->active_dwell =
1022
1023
		scan_ch->passive_dwell =
			cpu_to_le16(priv->hw_roc_duration);
Johannes Berg's avatar
Johannes Berg committed
1024
1025
1026
1027
1028
1029
1030
1031

		/* Set txpower levels to defaults */
		scan_ch->dsp_atten = 110;

		/* NOTE: if we were doing 6Mb OFDM for scans we'd use
		 * power level:
		 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
		 */
1032
		if (priv->hw_roc_channel->band == IEEE80211_BAND_5GHZ)
Johannes Berg's avatar
Johannes Berg committed
1033
1034
1035
1036
1037
			scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
		else
			scan_ch->tx_gain = ((1 << 5) | (5 << 3));
		}
		break;
1038
	}
Johannes Berg's avatar
Johannes Berg committed
1039

1040
1041
	if (scan->channel_count == 0) {
		IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
1042
		return -EIO;
1043
1044
	}

1045
	cmd.len[0] += le16_to_cpu(scan->tx_cmd.len) +
1046
	    scan->channel_count * sizeof(struct iwl_scan_channel);
1047
	cmd.data[0] = scan;
1048
	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1049
	scan->len = cpu_to_le16(cmd.len[0]);
1050

1051
	/* set scan bit here for PAN params */
1052
	set_bit(STATUS_SCAN_HW, &priv->shrd->status);
1053

Wey-Yi Guy's avatar
Wey-Yi Guy committed
1054
1055
1056
	ret = iwlagn_set_pan_params(priv);
	if (ret)
		return ret;
1057

1058
	ret = iwl_trans_send_cmd(trans(priv), &cmd);
1059
	if (ret) {
1060
		clear_bit(STATUS_SCAN_HW, &priv->shrd->status);
Wey-Yi Guy's avatar
Wey-Yi Guy committed
1061
		iwlagn_set_pan_params(priv);
1062
	}
1063

1064
	return ret;
1065
}
1066
1067
1068
1069

int iwlagn_manage_ibss_station(struct iwl_priv *priv,
			       struct ieee80211_vif *vif, bool add)
{
Johannes Berg's avatar
Johannes Berg committed
1070
1071
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;

1072
	if (add)
1073
1074
1075
		return iwlagn_add_bssid_station(priv, vif_priv->ctx,
						vif->bss_conf.bssid,
						&vif_priv->ibss_bssid_sta_id);
Johannes Berg's avatar
Johannes Berg committed
1076
1077
	return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
				  vif->bss_conf.bssid);
1078
}
1079
1080
1081
1082

void iwl_free_tfds_in_queue(struct iwl_priv *priv,
			    int sta_id, int tid, int freed)
{
1083
	lockdep_assert_held(&priv->shrd->sta_lock);
1084

1085
1086
1087
1088
1089
1090
1091
1092
1093
	if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed)
		priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
	else {
		IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n",
			priv->stations[sta_id].tid[tid].tfds_in_queue,
			freed);
		priv->stations[sta_id].tid[tid].tfds_in_queue = 0;
	}
}
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105

#define IWL_FLUSH_WAIT_MS	2000

int iwlagn_wait_tx_queue_empty(struct iwl_priv *priv)
{
	struct iwl_tx_queue *txq;
	struct iwl_queue *q;
	int cnt;
	unsigned long now = jiffies;
	int ret = 0;

	/* waiting for all the tx frames complete might take a while */
1106
	for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++) {
1107
		if (cnt == priv->shrd->cmd_queue)
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
			continue;
		txq = &priv->txq[cnt];
		q = &txq->q;
		while (q->read_ptr != q->write_ptr && !time_after(jiffies,
		       now + msecs_to_jiffies(IWL_FLUSH_WAIT_MS)))
				msleep(1);

		if (q->read_ptr != q->write_ptr) {
			IWL_ERR(priv, "fail to flush all tx fifo queues\n");
			ret = -ETIMEDOUT;
			break;
		}
	}
	return ret;
}

#define IWL_TX_QUEUE_MSK	0xfffff

/**
 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
 *
 * pre-requirements:
 *  1. acquire mutex before calling
 *  2. make sure rf is on and not in exit state
 */
int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
{
	struct iwl_txfifo_flush_cmd flush_cmd;
	struct iwl_host_cmd cmd = {
		.id = REPLY_TXFIFO_FLUSH,
1138
		.len = { sizeof(struct iwl_txfifo_flush_cmd), },
1139
		.flags = CMD_SYNC,
1140
		.data = { &flush_cmd, },
1141
1142
1143
1144
1145
	};

	might_sleep();

	memset(&flush_cmd, 0, sizeof(flush_cmd));
1146
1147
	if (flush_control & BIT(IWL_RXON_CTX_BSS))
		flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
Wey-Yi Guy's avatar
Wey-Yi Guy committed
1148
1149
				 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
				 IWL_SCD_MGMT_MSK;
1150
1151
	if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
	    (priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
Wey-Yi Guy's avatar
Wey-Yi Guy committed
1152
1153
1154
1155
1156
		flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
				IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
				IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
				IWL_PAN_SCD_MULTICAST_MSK;

1157
	if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
1158
1159
1160
1161
1162
1163
		flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;

	IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
		       flush_cmd.fifo_control);
	flush_cmd.flush_control = cpu_to_le16(flush_control);

1164
	return iwl_trans_send_cmd(trans(priv), &cmd);
1165
}
1166
1167
1168

void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
{
1169
	mutex_lock(&priv->shrd->mutex);
1170
	ieee80211_stop_queues(priv->hw);
1171
	if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1172
1173
1174
1175
1176
1177
1178
		IWL_ERR(priv, "flush request fail\n");
		goto done;
	}
	IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
	iwlagn_wait_tx_queue_empty(priv);
done:
	ieee80211_wake_queues(priv->hw);
1179
	mutex_unlock(&priv->shrd->mutex);
1180
}
Wey-Yi Guy's avatar
Wey-Yi Guy committed
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196