summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/rx.c
blob: 263e8a8576b73268e064be161f7784fbd646010d (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
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2016 Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "iwl-trans.h"
#include "mvm.h"
#include "fw-api.h"
#include "fw-dbg.h"

/*
 * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
 *
 * Copies the phy information in mvm->last_phy_info, it will be used when the
 * actual data will come from the fw in the next packet.
 */
void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);

	memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
	mvm->ampdu_ref++;

#ifdef CONFIG_IWLWIFI_DEBUGFS
	if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
		spin_lock(&mvm->drv_stats_lock);
		mvm->drv_rx_stats.ampdu_count++;
		spin_unlock(&mvm->drv_stats_lock);
	}
#endif
}

/*
 * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
 *
 * Adds the rxb to a new skb and give it to mac80211
 */
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
					    struct napi_struct *napi,
					    struct sk_buff *skb,
					    struct ieee80211_hdr *hdr, u16 len,
					    u32 ampdu_status, u8 crypt_len,
					    struct iwl_rx_cmd_buffer *rxb)
{
	unsigned int hdrlen, fraglen;

	/* If frame is small enough to fit in skb->head, pull it completely.
	 * If not, only pull ieee80211_hdr (including crypto if present, and
	 * an additional 8 bytes for SNAP/ethertype, see below) so that
	 * splice() or TCP coalesce are more efficient.
	 *
	 * Since, in addition, ieee80211_data_to_8023() always pull in at
	 * least 8 bytes (possibly more for mesh) we can do the same here
	 * to save the cost of doing it later. That still doesn't pull in
	 * the actual IP header since the typical case has a SNAP header.
	 * If the latter changes (there are efforts in the standards group
	 * to do so) we should revisit this and ieee80211_data_to_8023().
	 */
	hdrlen = (len <= skb_tailroom(skb)) ? len :
					      sizeof(*hdr) + crypt_len + 8;

	memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
	fraglen = len - hdrlen;

	if (fraglen) {
		int offset = (void *)hdr + hdrlen -
			     rxb_addr(rxb) + rxb_offset(rxb);

		skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
				fraglen, rxb->truesize);
	}

	ieee80211_rx_napi(mvm->hw, NULL, skb, napi);
}

/*
 * iwl_mvm_get_signal_strength - use new rx PHY INFO API
 * values are reported by the fw as positive values - need to negate
 * to obtain their dBM.  Account for missing antennas by replacing 0
 * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
 */
static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
					struct iwl_rx_phy_info *phy_info,
					struct ieee80211_rx_status *rx_status)
{
	int energy_a, energy_b, energy_c, max_energy;
	u32 val;

	val =
	    le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
	energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
						IWL_RX_INFO_ENERGY_ANT_A_POS;
	energy_a = energy_a ? -energy_a : S8_MIN;
	energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
						IWL_RX_INFO_ENERGY_ANT_B_POS;
	energy_b = energy_b ? -energy_b : S8_MIN;
	energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
						IWL_RX_INFO_ENERGY_ANT_C_POS;
	energy_c = energy_c ? -energy_c : S8_MIN;
	max_energy = max(energy_a, energy_b);
	max_energy = max(max_energy, energy_c);

	IWL_DEBUG_STATS(mvm, "energy In A %d B %d C %d , and max %d\n",
			energy_a, energy_b, energy_c, max_energy);

	rx_status->signal = max_energy;
	rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
				RX_RES_PHY_FLAGS_ANTENNA)
					>> RX_RES_PHY_FLAGS_ANTENNA_POS;
	rx_status->chain_signal[0] = energy_a;
	rx_status->chain_signal[1] = energy_b;
	rx_status->chain_signal[2] = energy_c;
}

/*
 * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
 * @mvm: the mvm object
 * @hdr: 80211 header
 * @stats: status in mac80211's format
 * @rx_pkt_status: status coming from fw
 *
 * returns non 0 value if the packet should be dropped
 */
static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
					struct ieee80211_hdr *hdr,
					struct ieee80211_rx_status *stats,
					u32 rx_pkt_status,
					u8 *crypt_len)
{
	if (!ieee80211_has_protected(hdr->frame_control) ||
	    (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
			     RX_MPDU_RES_STATUS_SEC_NO_ENC)
		return 0;

	/* packet was encrypted with unknown alg */
	if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
					RX_MPDU_RES_STATUS_SEC_ENC_ERR)
		return 0;

	switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
	case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
		/* alg is CCM: check MIC only */
		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
			return -1;

		stats->flag |= RX_FLAG_DECRYPTED;
		*crypt_len = IEEE80211_CCMP_HDR_LEN;
		return 0;

	case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
		/* Don't drop the frame and decrypt it in SW */
		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
			return 0;
		*crypt_len = IEEE80211_TKIP_IV_LEN;
		/* fall through if TTAK OK */

	case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
			return -1;

		stats->flag |= RX_FLAG_DECRYPTED;
		if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
				RX_MPDU_RES_STATUS_SEC_WEP_ENC)
			*crypt_len = IEEE80211_WEP_IV_LEN;
		return 0;

	case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
			return -1;
		stats->flag |= RX_FLAG_DECRYPTED;
		return 0;

	default:
		IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
	}

	return 0;
}

static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
			    struct sk_buff *skb,
			    u32 status)
{
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);

	if (mvmvif->features & NETIF_F_RXCSUM &&
	    status & RX_MPDU_RES_STATUS_CSUM_DONE &&
	    status & RX_MPDU_RES_STATUS_CSUM_OK)
		skb->ip_summed = CHECKSUM_UNNECESSARY;
}

/*
 * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
 *
 * Handles the actual data of the Rx packet from the fw
 */
void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
			struct iwl_rx_cmd_buffer *rxb)
{
	struct ieee80211_hdr *hdr;
	struct ieee80211_rx_status *rx_status;
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_rx_phy_info *phy_info;
	struct iwl_rx_mpdu_res_start *rx_res;
	struct ieee80211_sta *sta = NULL;
	struct sk_buff *skb;
	u32 len;
	u32 ampdu_status;
	u32 rate_n_flags;
	u32 rx_pkt_status;
	u8 crypt_len = 0;

	phy_info = &mvm->last_phy_info;
	rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
	hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
	len = le16_to_cpu(rx_res->byte_count);
	rx_pkt_status = le32_to_cpup((__le32 *)
		(pkt->data + sizeof(*rx_res) + len));

	/* Dont use dev_alloc_skb(), we'll have enough headroom once
	 * ieee80211_hdr pulled.
	 */
	skb = alloc_skb(128, GFP_ATOMIC);
	if (!skb) {
		IWL_ERR(mvm, "alloc_skb failed\n");
		return;
	}

	rx_status = IEEE80211_SKB_RXCB(skb);

	/*
	 * drop the packet if it has failed being decrypted by HW
	 */
	if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
					 &crypt_len)) {
		IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
			       rx_pkt_status);
		kfree_skb(skb);
		return;
	}

	/*
	 * Keep packets with CRC errors (and with overrun) for monitor mode
	 * (otherwise the firmware discards them) but mark them as bad.
	 */
	if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
	    !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
		IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
	}

	/* This will be used in several places later */
	rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);

	/* rx_status carries information about the packet to mac80211 */
	rx_status->mactime = le64_to_cpu(phy_info->timestamp);
	rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
	rx_status->band =
		(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
				NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
	rx_status->freq =
		ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
					       rx_status->band);

	/* TSF as indicated by the firmware  is at INA time */
	rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;

	iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);

	IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
			      (unsigned long long)rx_status->mactime);

	rcu_read_lock();
	if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
		u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;

		id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;

		if (!WARN_ON_ONCE(id >= IWL_MVM_STATION_COUNT)) {
			sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
			if (IS_ERR(sta))
				sta = NULL;
		}
	} else if (!is_multicast_ether_addr(hdr->addr2)) {
		/* This is fine since we prevent two stations with the same
		 * address from being added.
		 */
		sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
	}

	if (sta) {
		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);

		/* We have tx blocked stations (with CS bit). If we heard
		 * frames from a blocked station on a new channel we can
		 * TX to it again.
		 */
		if (unlikely(mvm->csa_tx_block_bcn_timeout))
			iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, false);

		rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);

		if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
		    ieee80211_is_beacon(hdr->frame_control)) {
			struct iwl_fw_dbg_trigger_tlv *trig;
			struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
			bool trig_check;
			s32 rssi;

			trig = iwl_fw_dbg_get_trigger(mvm->fw,
						      FW_DBG_TRIGGER_RSSI);
			rssi_trig = (void *)trig->data;
			rssi = le32_to_cpu(rssi_trig->rssi);

			trig_check =
				iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
							      trig);
			if (trig_check && rx_status->signal < rssi)
				iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
		}

		if (ieee80211_is_data(hdr->frame_control))
			iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
	}
	rcu_read_unlock();

	/* set the preamble flag if appropriate */
	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
		rx_status->flag |= RX_FLAG_SHORTPRE;

	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
		/*
		 * We know which subframes of an A-MPDU belong
		 * together since we get a single PHY response
		 * from the firmware for all of them
		 */
		rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
		rx_status->ampdu_reference = mvm->ampdu_ref;
	}

	/* Set up the HT phy flags */
	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
	case RATE_MCS_CHAN_WIDTH_20:
		break;
	case RATE_MCS_CHAN_WIDTH_40:
		rx_status->flag |= RX_FLAG_40MHZ;
		break;
	case RATE_MCS_CHAN_WIDTH_80:
		rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
		break;
	case RATE_MCS_CHAN_WIDTH_160:
		rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
		break;
	}
	if (rate_n_flags & RATE_MCS_SGI_MSK)
		rx_status->flag |= RX_FLAG_SHORT_GI;
	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
		rx_status->flag |= RX_FLAG_HT_GF;
	if (rate_n_flags & RATE_MCS_LDPC_MSK)
		rx_status->flag |= RX_FLAG_LDPC;
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
				RATE_MCS_STBC_POS;
		rx_status->flag |= RX_FLAG_HT;
		rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
		rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
	} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
		u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
				RATE_MCS_STBC_POS;
		rx_status->vht_nss =
			((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
						RATE_VHT_MCS_NSS_POS) + 1;
		rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
		rx_status->flag |= RX_FLAG_VHT;
		rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
		if (rate_n_flags & RATE_MCS_BF_MSK)
			rx_status->vht_flag |= RX_VHT_FLAG_BF;
	} else {
		rx_status->rate_idx =
			iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
							    rx_status->band);
	}

#ifdef CONFIG_IWLWIFI_DEBUGFS
	iwl_mvm_update_frame_stats(mvm, rate_n_flags,
				   rx_status->flag & RX_FLAG_AMPDU_DETAILS);
#endif

	if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
		      ieee80211_is_probe_resp(hdr->frame_control)) &&
		     mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;

	iwl_mvm_pass_packet_to_mac80211(mvm, napi, skb, hdr, len, ampdu_status,
					crypt_len, rxb);
}

static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
					 struct mvm_statistics_rx *rx_stats)
{
	lockdep_assert_held(&mvm->mutex);

	mvm->rx_stats = *rx_stats;
}

struct iwl_mvm_stat_data {
	struct iwl_mvm *mvm;
	__le32 mac_id;
	u8 beacon_filter_average_energy;
	struct mvm_statistics_general_v8 *general;
};

static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
				  struct ieee80211_vif *vif)
{
	struct iwl_mvm_stat_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	int sig = -data->beacon_filter_average_energy;
	int last_event;
	int thold = vif->bss_conf.cqm_rssi_thold;
	int hyst = vif->bss_conf.cqm_rssi_hyst;
	u16 id = le32_to_cpu(data->mac_id);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	/* This doesn't need the MAC ID check since it's not taking the
	 * data copied into the "data" struct, but rather the data from
	 * the notification directly.
	 */
	if (data->general) {
		mvmvif->beacon_stats.num_beacons =
			le32_to_cpu(data->general->beacon_counter[mvmvif->id]);
		mvmvif->beacon_stats.avg_signal =
			-data->general->beacon_average_energy[mvmvif->id];
	}

	if (mvmvif->id != id)
		return;

	if (vif->type != NL80211_IFTYPE_STATION)
		return;

	if (sig == 0) {
		IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
		return;
	}

	mvmvif->bf_data.ave_beacon_signal = sig;

	/* BT Coex */
	if (mvmvif->bf_data.bt_coex_min_thold !=
	    mvmvif->bf_data.bt_coex_max_thold) {
		last_event = mvmvif->bf_data.last_bt_coex_event;
		if (sig > mvmvif->bf_data.bt_coex_max_thold &&
		    (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
		     last_event == 0)) {
			mvmvif->bf_data.last_bt_coex_event = sig;
			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
				     sig);
			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
		} else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
			   (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
			    last_event == 0)) {
			mvmvif->bf_data.last_bt_coex_event = sig;
			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
				     sig);
			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
		}
	}

	if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
		return;

	/* CQM Notification */
	last_event = mvmvif->bf_data.last_cqm_event;
	if (thold && sig < thold && (last_event == 0 ||
				     sig < last_event - hyst)) {
		mvmvif->bf_data.last_cqm_event = sig;
		IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
			     sig);
		ieee80211_cqm_rssi_notify(
			vif,
			NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
			GFP_KERNEL);
	} else if (sig > thold &&
		   (last_event == 0 || sig > last_event + hyst)) {
		mvmvif->bf_data.last_cqm_event = sig;
		IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
			     sig);
		ieee80211_cqm_rssi_notify(
			vif,
			NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
			GFP_KERNEL);
	}
}

static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_stats *trig_stats;
	u32 trig_offset, trig_thold;

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

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_STATS);
	trig_stats = (void *)trig->data;

	if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
		return;

	trig_offset = le32_to_cpu(trig_stats->stop_offset);
	trig_thold = le32_to_cpu(trig_stats->stop_threshold);

	if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
		return;

	if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
		return;

	iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL);
}

void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
				  struct iwl_rx_packet *pkt)
{
	struct iwl_notif_statistics_v10 *stats = (void *)&pkt->data;
	struct iwl_mvm_stat_data data = {
		.mvm = mvm,
	};
	u32 temperature;

	if (iwl_rx_packet_payload_len(pkt) != sizeof(*stats))
		goto invalid;

	temperature = le32_to_cpu(stats->general.radio_temperature);
	data.mac_id = stats->rx.general.mac_id;
	data.beacon_filter_average_energy =
		stats->general.beacon_filter_average_energy;

	iwl_mvm_update_rx_statistics(mvm, &stats->rx);

	mvm->radio_stats.rx_time = le64_to_cpu(stats->general.rx_time);
	mvm->radio_stats.tx_time = le64_to_cpu(stats->general.tx_time);
	mvm->radio_stats.on_time_rf =
		le64_to_cpu(stats->general.on_time_rf);
	mvm->radio_stats.on_time_scan =
		le64_to_cpu(stats->general.on_time_scan);

	data.general = &stats->general;

	iwl_mvm_rx_stats_check_trigger(mvm, pkt);

	ieee80211_iterate_active_interfaces(mvm->hw,
					    IEEE80211_IFACE_ITER_NORMAL,
					    iwl_mvm_stat_iterator,
					    &data);
	return;
 invalid:
	IWL_ERR(mvm, "received invalid statistics size (%d)!\n",
		iwl_rx_packet_payload_len(pkt));
}

void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
{
	iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
}

void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
				 struct iwl_rx_cmd_buffer *rxb)
{
	struct iwl_rx_packet *pkt = rxb_addr(rxb);
	struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
	int i;
	u32 pkt_len = iwl_rx_packet_payload_len(pkt);

	if (WARN_ONCE(pkt_len != sizeof(*notif),
		      "Received window status notification of wrong size (%u)\n",
		      pkt_len))
		return;

	rcu_read_lock();
	for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
		struct ieee80211_sta *sta;
		u8 sta_id, tid;
		u64 bitmap;
		u32 ssn;
		u16 ratid;
		u16 received_mpdu;

		ratid = le16_to_cpu(notif->ra_tid[i]);
		/* check that this TID is valid */
		if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
			continue;

		received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
		if (received_mpdu == 0)
			continue;

		tid = ratid & BA_WINDOW_STATUS_TID_MSK;
		/* get the station */
		sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
			 >> BA_WINDOW_STATUS_STA_ID_POS;
		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
		if (IS_ERR_OR_NULL(sta))
			continue;
		bitmap = le64_to_cpu(notif->bitmap[i]);
		ssn = le32_to_cpu(notif->start_seq_num[i]);

		/* update mac80211 with the bitmap for the reordering buffer */
		ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
						     received_mpdu);
	}
	rcu_read_unlock();
}