xref: /freebsd/sys/contrib/dev/iwlwifi/mvm/rx.c (revision 924226fba12cc9a228c73b956e1b7fa24c60b055)
1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2021 Intel Corporation
4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
6  */
7 #include <asm/unaligned.h>
8 #include <linux/etherdevice.h>
9 #include <linux/skbuff.h>
10 #include "iwl-trans.h"
11 #include "mvm.h"
12 #include "fw-api.h"
13 
14 /*
15  * iwl_mvm_rx_rx_phy_cmd - REPLY_RX_PHY_CMD handler
16  *
17  * Copies the phy information in mvm->last_phy_info, it will be used when the
18  * actual data will come from the fw in the next packet.
19  */
20 void iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
21 {
22 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
23 	unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
24 
25 	if (unlikely(pkt_len < sizeof(mvm->last_phy_info)))
26 		return;
27 
28 	memcpy(&mvm->last_phy_info, pkt->data, sizeof(mvm->last_phy_info));
29 	mvm->ampdu_ref++;
30 
31 #ifdef CONFIG_IWLWIFI_DEBUGFS
32 	if (mvm->last_phy_info.phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
33 		spin_lock(&mvm->drv_stats_lock);
34 		mvm->drv_rx_stats.ampdu_count++;
35 		spin_unlock(&mvm->drv_stats_lock);
36 	}
37 #endif
38 }
39 
40 /*
41  * iwl_mvm_pass_packet_to_mac80211 - builds the packet for mac80211
42  *
43  * Adds the rxb to a new skb and give it to mac80211
44  */
45 static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
46 					    struct ieee80211_sta *sta,
47 					    struct napi_struct *napi,
48 					    struct sk_buff *skb,
49 					    struct ieee80211_hdr *hdr, u16 len,
50 					    u8 crypt_len,
51 					    struct iwl_rx_cmd_buffer *rxb)
52 {
53 	unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
54 	unsigned int fraglen;
55 
56 	/*
57 	 * The 'hdrlen' (plus the 8 bytes for the SNAP and the crypt_len,
58 	 * but those are all multiples of 4 long) all goes away, but we
59 	 * want the *end* of it, which is going to be the start of the IP
60 	 * header, to be aligned when it gets pulled in.
61 	 * The beginning of the skb->data is aligned on at least a 4-byte
62 	 * boundary after allocation. Everything here is aligned at least
63 	 * on a 2-byte boundary so we can just take hdrlen & 3 and pad by
64 	 * the result.
65 	 */
66 	skb_reserve(skb, hdrlen & 3);
67 
68 	/* If frame is small enough to fit in skb->head, pull it completely.
69 	 * If not, only pull ieee80211_hdr (including crypto if present, and
70 	 * an additional 8 bytes for SNAP/ethertype, see below) so that
71 	 * splice() or TCP coalesce are more efficient.
72 	 *
73 	 * Since, in addition, ieee80211_data_to_8023() always pull in at
74 	 * least 8 bytes (possibly more for mesh) we can do the same here
75 	 * to save the cost of doing it later. That still doesn't pull in
76 	 * the actual IP header since the typical case has a SNAP header.
77 	 * If the latter changes (there are efforts in the standards group
78 	 * to do so) we should revisit this and ieee80211_data_to_8023().
79 	 */
80 	hdrlen = (len <= skb_tailroom(skb)) ? len : hdrlen + crypt_len + 8;
81 
82 	skb_put_data(skb, hdr, hdrlen);
83 	fraglen = len - hdrlen;
84 
85 	if (fraglen) {
86 		int offset = (u8 *)hdr + hdrlen -
87 			     (u8 *)rxb_addr(rxb) + rxb_offset(rxb);
88 
89 		skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
90 				fraglen, rxb->truesize);
91 	}
92 
93 	ieee80211_rx_napi(mvm->hw, sta, skb, napi);
94 }
95 
96 /*
97  * iwl_mvm_get_signal_strength - use new rx PHY INFO API
98  * values are reported by the fw as positive values - need to negate
99  * to obtain their dBM.  Account for missing antennas by replacing 0
100  * values by -256dBm: practically 0 power and a non-feasible 8 bit value.
101  */
102 static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
103 					struct iwl_rx_phy_info *phy_info,
104 					struct ieee80211_rx_status *rx_status)
105 {
106 	int energy_a, energy_b, max_energy;
107 	u32 val;
108 
109 	val =
110 	    le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
111 	energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
112 						IWL_RX_INFO_ENERGY_ANT_A_POS;
113 	energy_a = energy_a ? -energy_a : S8_MIN;
114 	energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
115 						IWL_RX_INFO_ENERGY_ANT_B_POS;
116 	energy_b = energy_b ? -energy_b : S8_MIN;
117 	max_energy = max(energy_a, energy_b);
118 
119 	IWL_DEBUG_STATS(mvm, "energy In A %d B %d  , and max %d\n",
120 			energy_a, energy_b, max_energy);
121 
122 	rx_status->signal = max_energy;
123 	rx_status->chains = (le16_to_cpu(phy_info->phy_flags) &
124 				RX_RES_PHY_FLAGS_ANTENNA)
125 					>> RX_RES_PHY_FLAGS_ANTENNA_POS;
126 	rx_status->chain_signal[0] = energy_a;
127 	rx_status->chain_signal[1] = energy_b;
128 }
129 
130 /*
131  * iwl_mvm_set_mac80211_rx_flag - translate fw status to mac80211 format
132  * @mvm: the mvm object
133  * @hdr: 80211 header
134  * @stats: status in mac80211's format
135  * @rx_pkt_status: status coming from fw
136  *
137  * returns non 0 value if the packet should be dropped
138  */
139 static u32 iwl_mvm_set_mac80211_rx_flag(struct iwl_mvm *mvm,
140 					struct ieee80211_hdr *hdr,
141 					struct ieee80211_rx_status *stats,
142 					u32 rx_pkt_status,
143 					u8 *crypt_len)
144 {
145 	if (!ieee80211_has_protected(hdr->frame_control) ||
146 	    (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
147 			     RX_MPDU_RES_STATUS_SEC_NO_ENC)
148 		return 0;
149 
150 	/* packet was encrypted with unknown alg */
151 	if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
152 					RX_MPDU_RES_STATUS_SEC_ENC_ERR)
153 		return 0;
154 
155 	switch (rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) {
156 	case RX_MPDU_RES_STATUS_SEC_CCM_ENC:
157 		/* alg is CCM: check MIC only */
158 		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
159 			return -1;
160 
161 		stats->flag |= RX_FLAG_DECRYPTED;
162 		*crypt_len = IEEE80211_CCMP_HDR_LEN;
163 		return 0;
164 
165 	case RX_MPDU_RES_STATUS_SEC_TKIP_ENC:
166 		/* Don't drop the frame and decrypt it in SW */
167 		if (!fw_has_api(&mvm->fw->ucode_capa,
168 				IWL_UCODE_TLV_API_DEPRECATE_TTAK) &&
169 		    !(rx_pkt_status & RX_MPDU_RES_STATUS_TTAK_OK))
170 			return 0;
171 		*crypt_len = IEEE80211_TKIP_IV_LEN;
172 		fallthrough;
173 
174 	case RX_MPDU_RES_STATUS_SEC_WEP_ENC:
175 		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_ICV_OK))
176 			return -1;
177 
178 		stats->flag |= RX_FLAG_DECRYPTED;
179 		if ((rx_pkt_status & RX_MPDU_RES_STATUS_SEC_ENC_MSK) ==
180 				RX_MPDU_RES_STATUS_SEC_WEP_ENC)
181 			*crypt_len = IEEE80211_WEP_IV_LEN;
182 		return 0;
183 
184 	case RX_MPDU_RES_STATUS_SEC_EXT_ENC:
185 		if (!(rx_pkt_status & RX_MPDU_RES_STATUS_MIC_OK))
186 			return -1;
187 		stats->flag |= RX_FLAG_DECRYPTED;
188 		return 0;
189 
190 	default:
191 		/* Expected in monitor (not having the keys) */
192 #if defined(__linux__)
193 		if (!mvm->monitor_on)
194 			IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
195 #elif defined(__FreeBSD__)
196 		if (!mvm->monitor_on && net_ratelimit())
197 			IWL_ERR(mvm, "%s: Unhandled alg: 0x%x\n",
198 			    __func__, rx_pkt_status);
199 #endif
200 	}
201 
202 	return 0;
203 }
204 
205 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
206 				  struct ieee80211_sta *sta,
207 				  struct ieee80211_hdr *hdr, u32 len,
208 				  struct iwl_rx_phy_info *phy_info,
209 				  u32 rate_n_flags)
210 {
211 	struct iwl_mvm_sta *mvmsta;
212 	struct iwl_mvm_tcm_mac *mdata;
213 	int mac;
214 	int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
215 	struct iwl_mvm_vif *mvmvif;
216 	/* expected throughput in 100Kbps, single stream, 20 MHz */
217 	static const u8 thresh_tpt[] = {
218 		9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
219 	};
220 	u16 thr;
221 
222 	if (ieee80211_is_data_qos(hdr->frame_control))
223 		ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)];
224 
225 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
226 	mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
227 
228 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
229 		schedule_delayed_work(&mvm->tcm.work, 0);
230 	mdata = &mvm->tcm.data[mac];
231 	mdata->rx.pkts[ac]++;
232 
233 	/* count the airtime only once for each ampdu */
234 	if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
235 		mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
236 		mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
237 	}
238 
239 	if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
240 		return;
241 
242 	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
243 
244 	if (mdata->opened_rx_ba_sessions ||
245 	    mdata->uapsd_nonagg_detect.detected ||
246 	    (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
247 	     !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
248 	     !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
249 	     !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) ||
250 	    mvmsta->sta_id != mvmvif->ap_sta_id)
251 		return;
252 
253 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
254 		thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
255 		thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
256 					RATE_HT_MCS_NSS_POS_V1);
257 	} else {
258 		if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
259 				ARRAY_SIZE(thresh_tpt)))
260 			return;
261 		thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
262 		thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
263 					RATE_VHT_MCS_NSS_POS);
264 	}
265 
266 	thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
267 				RATE_MCS_CHAN_WIDTH_POS);
268 
269 	mdata->uapsd_nonagg_detect.rx_bytes += len;
270 	ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
271 }
272 
273 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
274 			    struct sk_buff *skb,
275 			    u32 status)
276 {
277 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
278 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
279 
280 	if (mvmvif->features & NETIF_F_RXCSUM &&
281 	    status & RX_MPDU_RES_STATUS_CSUM_DONE &&
282 	    status & RX_MPDU_RES_STATUS_CSUM_OK)
283 		skb->ip_summed = CHECKSUM_UNNECESSARY;
284 }
285 
286 /*
287  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
288  *
289  * Handles the actual data of the Rx packet from the fw
290  */
291 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
292 			struct iwl_rx_cmd_buffer *rxb)
293 {
294 	struct ieee80211_hdr *hdr;
295 	struct ieee80211_rx_status *rx_status;
296 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
297 	struct iwl_rx_phy_info *phy_info;
298 	struct iwl_rx_mpdu_res_start *rx_res;
299 	struct ieee80211_sta *sta = NULL;
300 	struct sk_buff *skb;
301 	u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
302 	u32 rate_n_flags;
303 	u32 rx_pkt_status;
304 	u8 crypt_len = 0;
305 
306 	if (unlikely(pkt_len < sizeof(*rx_res))) {
307 		IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
308 		return;
309 	}
310 
311 	phy_info = &mvm->last_phy_info;
312 	rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
313 	hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
314 	len = le16_to_cpu(rx_res->byte_count);
315 
316 	if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
317 		IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
318 		return;
319 	}
320 
321 	rx_pkt_status = get_unaligned_le32((__le32 *)
322 		(pkt->data + sizeof(*rx_res) + len));
323 
324 	/* Dont use dev_alloc_skb(), we'll have enough headroom once
325 	 * ieee80211_hdr pulled.
326 	 */
327 	skb = alloc_skb(128, GFP_ATOMIC);
328 	if (!skb) {
329 		IWL_ERR(mvm, "alloc_skb failed\n");
330 		return;
331 	}
332 
333 	rx_status = IEEE80211_SKB_RXCB(skb);
334 
335 	/*
336 	 * drop the packet if it has failed being decrypted by HW
337 	 */
338 	if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
339 					 &crypt_len)) {
340 		IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
341 			       rx_pkt_status);
342 		kfree_skb(skb);
343 		return;
344 	}
345 
346 	/*
347 	 * Keep packets with CRC errors (and with overrun) for monitor mode
348 	 * (otherwise the firmware discards them) but mark them as bad.
349 	 */
350 	if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
351 	    !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
352 		IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
353 		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
354 	}
355 
356 	/* This will be used in several places later */
357 	rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
358 
359 	/* rx_status carries information about the packet to mac80211 */
360 	rx_status->mactime = le64_to_cpu(phy_info->timestamp);
361 	rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
362 	rx_status->band =
363 		(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
364 				NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
365 	rx_status->freq =
366 		ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
367 					       rx_status->band);
368 
369 	/* TSF as indicated by the firmware  is at INA time */
370 	rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
371 
372 	iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
373 
374 	IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
375 			      (unsigned long long)rx_status->mactime);
376 
377 	rcu_read_lock();
378 	if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
379 		u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
380 
381 		id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
382 
383 		if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
384 			sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
385 			if (IS_ERR(sta))
386 				sta = NULL;
387 		}
388 	} else if (!is_multicast_ether_addr(hdr->addr2)) {
389 		/* This is fine since we prevent two stations with the same
390 		 * address from being added.
391 		 */
392 		sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
393 	}
394 
395 	if (sta) {
396 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
397 		struct ieee80211_vif *tx_blocked_vif =
398 			rcu_dereference(mvm->csa_tx_blocked_vif);
399 		struct iwl_fw_dbg_trigger_tlv *trig;
400 		struct ieee80211_vif *vif = mvmsta->vif;
401 
402 		/* We have tx blocked stations (with CS bit). If we heard
403 		 * frames from a blocked station on a new channel we can
404 		 * TX to it again.
405 		 */
406 		if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
407 			struct iwl_mvm_vif *mvmvif =
408 				iwl_mvm_vif_from_mac80211(tx_blocked_vif);
409 
410 			if (mvmvif->csa_target_freq == rx_status->freq)
411 				iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
412 								 false);
413 		}
414 
415 		rs_update_last_rssi(mvm, mvmsta, rx_status);
416 
417 		trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
418 					     ieee80211_vif_to_wdev(vif),
419 					     FW_DBG_TRIGGER_RSSI);
420 
421 		if (trig && ieee80211_is_beacon(hdr->frame_control)) {
422 			struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
423 			s32 rssi;
424 
425 			rssi_trig = (void *)trig->data;
426 			rssi = le32_to_cpu(rssi_trig->rssi);
427 
428 			if (rx_status->signal < rssi)
429 				iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
430 							NULL);
431 		}
432 
433 		if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
434 		    !is_multicast_ether_addr(hdr->addr1) &&
435 		    ieee80211_is_data(hdr->frame_control))
436 			iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
437 					      rate_n_flags);
438 
439 		if (ieee80211_is_data(hdr->frame_control))
440 			iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
441 	}
442 	rcu_read_unlock();
443 
444 	/* set the preamble flag if appropriate */
445 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
446 		rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
447 
448 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
449 		/*
450 		 * We know which subframes of an A-MPDU belong
451 		 * together since we get a single PHY response
452 		 * from the firmware for all of them
453 		 */
454 		rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
455 		rx_status->ampdu_reference = mvm->ampdu_ref;
456 	}
457 
458 	/* Set up the HT phy flags */
459 	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
460 	case RATE_MCS_CHAN_WIDTH_20:
461 		break;
462 	case RATE_MCS_CHAN_WIDTH_40:
463 		rx_status->bw = RATE_INFO_BW_40;
464 		break;
465 	case RATE_MCS_CHAN_WIDTH_80:
466 		rx_status->bw = RATE_INFO_BW_80;
467 		break;
468 	case RATE_MCS_CHAN_WIDTH_160:
469 		rx_status->bw = RATE_INFO_BW_160;
470 		break;
471 	}
472 	if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
473 	    rate_n_flags & RATE_MCS_SGI_MSK_V1)
474 		rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
475 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
476 		rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
477 	if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
478 		rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
479 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
480 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
481 				RATE_MCS_STBC_POS;
482 		rx_status->encoding = RX_ENC_HT;
483 		rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
484 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
485 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
486 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
487 				RATE_MCS_STBC_POS;
488 		rx_status->nss =
489 			((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
490 						RATE_VHT_MCS_NSS_POS) + 1;
491 		rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
492 		rx_status->encoding = RX_ENC_VHT;
493 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
494 		if (rate_n_flags & RATE_MCS_BF_MSK)
495 			rx_status->enc_flags |= RX_ENC_FLAG_BF;
496 	} else {
497 		int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
498 							       rx_status->band);
499 
500 		if (WARN(rate < 0 || rate > 0xFF,
501 			 "Invalid rate flags 0x%x, band %d,\n",
502 			 rate_n_flags, rx_status->band)) {
503 			kfree_skb(skb);
504 			return;
505 		}
506 		rx_status->rate_idx = rate;
507 	}
508 
509 #ifdef CONFIG_IWLWIFI_DEBUGFS
510 	iwl_mvm_update_frame_stats(mvm, rate_n_flags,
511 				   rx_status->flag & RX_FLAG_AMPDU_DETAILS);
512 #endif
513 
514 	if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
515 		      ieee80211_is_probe_resp(hdr->frame_control)) &&
516 		     mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
517 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
518 
519 	if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
520 		     ieee80211_is_probe_resp(hdr->frame_control)))
521 		rx_status->boottime_ns = ktime_get_boottime_ns();
522 
523 	iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
524 					crypt_len, rxb);
525 }
526 
527 struct iwl_mvm_stat_data {
528 	struct iwl_mvm *mvm;
529 	__le32 flags;
530 	__le32 mac_id;
531 	u8 beacon_filter_average_energy;
532 	__le32 *beacon_counter;
533 	u8 *beacon_average_energy;
534 };
535 
536 struct iwl_mvm_stat_data_all_macs {
537 	struct iwl_mvm *mvm;
538 	__le32 flags;
539 	struct iwl_statistics_ntfy_per_mac *per_mac_stats;
540 };
541 
542 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
543 {
544 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
545 	struct iwl_mvm *mvm = mvmvif->mvm;
546 	int thold = vif->bss_conf.cqm_rssi_thold;
547 	int hyst = vif->bss_conf.cqm_rssi_hyst;
548 	int last_event;
549 
550 	if (sig == 0) {
551 		IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
552 		return;
553 	}
554 
555 	mvmvif->bf_data.ave_beacon_signal = sig;
556 
557 	/* BT Coex */
558 	if (mvmvif->bf_data.bt_coex_min_thold !=
559 	    mvmvif->bf_data.bt_coex_max_thold) {
560 		last_event = mvmvif->bf_data.last_bt_coex_event;
561 		if (sig > mvmvif->bf_data.bt_coex_max_thold &&
562 		    (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
563 		     last_event == 0)) {
564 			mvmvif->bf_data.last_bt_coex_event = sig;
565 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
566 				     sig);
567 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
568 		} else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
569 			   (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
570 			    last_event == 0)) {
571 			mvmvif->bf_data.last_bt_coex_event = sig;
572 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
573 				     sig);
574 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
575 		}
576 	}
577 
578 	if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
579 		return;
580 
581 	/* CQM Notification */
582 	last_event = mvmvif->bf_data.last_cqm_event;
583 	if (thold && sig < thold && (last_event == 0 ||
584 				     sig < last_event - hyst)) {
585 		mvmvif->bf_data.last_cqm_event = sig;
586 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
587 			     sig);
588 		ieee80211_cqm_rssi_notify(
589 			vif,
590 			NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
591 			sig,
592 			GFP_KERNEL);
593 	} else if (sig > thold &&
594 		   (last_event == 0 || sig > last_event + hyst)) {
595 		mvmvif->bf_data.last_cqm_event = sig;
596 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
597 			     sig);
598 		ieee80211_cqm_rssi_notify(
599 			vif,
600 			NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
601 			sig,
602 			GFP_KERNEL);
603 	}
604 }
605 
606 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
607 				  struct ieee80211_vif *vif)
608 {
609 	struct iwl_mvm_stat_data *data = _data;
610 	int sig = -data->beacon_filter_average_energy;
611 	u16 id = le32_to_cpu(data->mac_id);
612 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
613 	u16 vif_id = mvmvif->id;
614 
615 	/* This doesn't need the MAC ID check since it's not taking the
616 	 * data copied into the "data" struct, but rather the data from
617 	 * the notification directly.
618 	 */
619 	mvmvif->beacon_stats.num_beacons =
620 		le32_to_cpu(data->beacon_counter[vif_id]);
621 	mvmvif->beacon_stats.avg_signal =
622 		-data->beacon_average_energy[vif_id];
623 
624 	if (mvmvif->id != id)
625 		return;
626 
627 	if (vif->type != NL80211_IFTYPE_STATION)
628 		return;
629 
630 	/* make sure that beacon statistics don't go backwards with TCM
631 	 * request to clear statistics
632 	 */
633 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
634 		mvmvif->beacon_stats.accu_num_beacons +=
635 			mvmvif->beacon_stats.num_beacons;
636 
637 	iwl_mvm_update_vif_sig(vif, sig);
638 }
639 
640 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
641 					   struct ieee80211_vif *vif)
642 {
643 	struct iwl_mvm_stat_data_all_macs *data = _data;
644 	struct iwl_statistics_ntfy_per_mac *mac_stats;
645 	int sig;
646 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
647 	u16 vif_id = mvmvif->id;
648 
649 	if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
650 		return;
651 
652 	if (vif->type != NL80211_IFTYPE_STATION)
653 		return;
654 
655 	mac_stats = &data->per_mac_stats[vif_id];
656 
657 	mvmvif->beacon_stats.num_beacons =
658 		le32_to_cpu(mac_stats->beacon_counter);
659 	mvmvif->beacon_stats.avg_signal =
660 		-le32_to_cpu(mac_stats->beacon_average_energy);
661 
662 	/* make sure that beacon statistics don't go backwards with TCM
663 	 * request to clear statistics
664 	 */
665 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
666 		mvmvif->beacon_stats.accu_num_beacons +=
667 			mvmvif->beacon_stats.num_beacons;
668 
669 	sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
670 	iwl_mvm_update_vif_sig(vif, sig);
671 }
672 
673 static inline void
674 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
675 {
676 	struct iwl_fw_dbg_trigger_tlv *trig;
677 	struct iwl_fw_dbg_trigger_stats *trig_stats;
678 	u32 trig_offset, trig_thold;
679 
680 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
681 	if (!trig)
682 		return;
683 
684 	trig_stats = (void *)trig->data;
685 
686 	trig_offset = le32_to_cpu(trig_stats->stop_offset);
687 	trig_thold = le32_to_cpu(trig_stats->stop_threshold);
688 
689 	if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
690 		return;
691 
692 	if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
693 		return;
694 
695 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
696 }
697 
698 static void iwl_mvm_stats_energy_iter(void *_data,
699 				      struct ieee80211_sta *sta)
700 {
701 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
702 	u8 *energy = _data;
703 	u32 sta_id = mvmsta->sta_id;
704 
705 	if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
706 		      sta_id, IWL_MVM_STATION_COUNT_MAX))
707 		return;
708 
709 	if (energy[sta_id])
710 		mvmsta->avg_energy = energy[sta_id];
711 
712 }
713 
714 static void
715 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
716 			      __le32 *rx_bytes_le)
717 {
718 	int i;
719 
720 	spin_lock(&mvm->tcm.lock);
721 	for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
722 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
723 		u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
724 		u32 airtime = le32_to_cpu(air_time_le[i]);
725 
726 		mdata->rx.airtime += airtime;
727 		mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
728 		if (airtime) {
729 			/* re-init every time to store rate from FW */
730 			ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
731 			ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
732 				      rx_bytes * 8 / airtime);
733 		}
734 	}
735 	spin_unlock(&mvm->tcm.lock);
736 }
737 
738 static void
739 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
740 		     struct iwl_statistics_operational_ntfy *stats)
741 {
742 	struct iwl_mvm_stat_data_all_macs data = {
743 		.mvm = mvm,
744 		.flags = stats->flags,
745 		.per_mac_stats = stats->per_mac_stats,
746 	};
747 
748 	ieee80211_iterate_active_interfaces(mvm->hw,
749 					    IEEE80211_IFACE_ITER_NORMAL,
750 					    iwl_mvm_stat_iterator_all_macs,
751 					    &data);
752 }
753 
754 static void
755 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
756 		     struct iwl_statistics_operational_ntfy_ver_14 *stats)
757 {
758 	struct iwl_mvm_stat_data data = {
759 		.mvm = mvm,
760 	};
761 
762 	u8 beacon_average_energy[MAC_INDEX_AUX];
763 	__le32 flags;
764 	int i;
765 
766 	flags = stats->flags;
767 
768 	data.mac_id = stats->mac_id;
769 	data.beacon_filter_average_energy =
770 		le32_to_cpu(stats->beacon_filter_average_energy);
771 	data.flags = flags;
772 	data.beacon_counter = stats->beacon_counter;
773 
774 	for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
775 		beacon_average_energy[i] =
776 			le32_to_cpu(stats->beacon_average_energy[i]);
777 
778 	data.beacon_average_energy = beacon_average_energy;
779 
780 	ieee80211_iterate_active_interfaces(mvm->hw,
781 					    IEEE80211_IFACE_ITER_NORMAL,
782 					    iwl_mvm_stat_iterator,
783 					    &data);
784 }
785 
786 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
787 				     struct iwl_rx_packet *pkt,
788 				     u32 expected_size)
789 {
790 	struct iwl_statistics_ntfy_hdr *hdr;
791 
792 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
793 		      "received invalid statistics size (%d)!, expected_size: %d\n",
794 		      iwl_rx_packet_payload_len(pkt), expected_size))
795 		return false;
796 
797 	hdr = (void *)&pkt->data;
798 
799 	if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
800 		      hdr->version !=
801 		      iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
802 		      "received unsupported hdr type %d, version %d\n",
803 		      hdr->type, hdr->version))
804 		return false;
805 
806 	if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
807 		      "received invalid statistics size in header (%d)!, expected_size: %d\n",
808 		      le16_to_cpu(hdr->size), expected_size))
809 		return false;
810 
811 	return true;
812 }
813 
814 static void
815 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
816 				 struct iwl_rx_packet *pkt)
817 {
818 	u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
819 	__le32 air_time[MAC_INDEX_AUX];
820 	__le32 rx_bytes[MAC_INDEX_AUX];
821 	__le32 flags = 0;
822 	int i;
823 	u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
824 					      STATISTICS_NOTIFICATION, 0);
825 
826 	if (WARN_ONCE(notif_ver > 15,
827 		      "invalid statistics version id: %d\n", notif_ver))
828 		return;
829 
830 	if (notif_ver == 14) {
831 		struct iwl_statistics_operational_ntfy_ver_14 *stats =
832 			(void *)pkt->data;
833 
834 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
835 			return;
836 
837 		iwl_mvm_stats_ver_14(mvm, stats);
838 
839 		flags = stats->flags;
840 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
841 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
842 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
843 		mvm->radio_stats.on_time_scan =
844 			le64_to_cpu(stats->on_time_scan);
845 
846 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
847 			average_energy[i] = le32_to_cpu(stats->average_energy[i]);
848 
849 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
850 			air_time[i] = stats->air_time[i];
851 			rx_bytes[i] = stats->rx_bytes[i];
852 		}
853 	}
854 
855 	if (notif_ver == 15) {
856 		struct iwl_statistics_operational_ntfy *stats =
857 			(void *)pkt->data;
858 
859 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
860 			return;
861 
862 		iwl_mvm_stats_ver_15(mvm, stats);
863 
864 		flags = stats->flags;
865 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
866 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
867 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
868 		mvm->radio_stats.on_time_scan =
869 			le64_to_cpu(stats->on_time_scan);
870 
871 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
872 			average_energy[i] =
873 				le32_to_cpu(stats->per_sta_stats[i].average_energy);
874 
875 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
876 			air_time[i] = stats->per_mac_stats[i].air_time;
877 			rx_bytes[i] = stats->per_mac_stats[i].rx_bytes;
878 		}
879 	}
880 
881 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
882 
883 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
884 					  average_energy);
885 	/*
886 	 * Don't update in case the statistics are not cleared, since
887 	 * we will end up counting twice the same airtime, once in TCM
888 	 * request and once in statistics notification.
889 	 */
890 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
891 		iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
892 }
893 
894 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
895 				  struct iwl_rx_packet *pkt)
896 {
897 	struct iwl_mvm_stat_data data = {
898 		.mvm = mvm,
899 	};
900 	__le32 *bytes, *air_time, flags;
901 	int expected_size;
902 	u8 *energy;
903 
904 	/* From ver 14 and up we use TLV statistics format */
905 	if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
906 				    STATISTICS_NOTIFICATION, 0) >= 14)
907 		return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
908 
909 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
910 		if (iwl_mvm_has_new_rx_api(mvm))
911 			expected_size = sizeof(struct iwl_notif_statistics_v11);
912 		else
913 			expected_size = sizeof(struct iwl_notif_statistics_v10);
914 	} else {
915 		expected_size = sizeof(struct iwl_notif_statistics);
916 	}
917 
918 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
919 		      "received invalid statistics size (%d)!\n",
920 		      iwl_rx_packet_payload_len(pkt)))
921 		return;
922 
923 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
924 		struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
925 
926 		data.mac_id = stats->rx.general.mac_id;
927 		data.beacon_filter_average_energy =
928 			stats->general.common.beacon_filter_average_energy;
929 
930 		mvm->rx_stats_v3 = stats->rx;
931 
932 		mvm->radio_stats.rx_time =
933 			le64_to_cpu(stats->general.common.rx_time);
934 		mvm->radio_stats.tx_time =
935 			le64_to_cpu(stats->general.common.tx_time);
936 		mvm->radio_stats.on_time_rf =
937 			le64_to_cpu(stats->general.common.on_time_rf);
938 		mvm->radio_stats.on_time_scan =
939 			le64_to_cpu(stats->general.common.on_time_scan);
940 
941 		data.beacon_counter = stats->general.beacon_counter;
942 		data.beacon_average_energy =
943 			stats->general.beacon_average_energy;
944 		flags = stats->flag;
945 	} else {
946 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
947 
948 		data.mac_id = stats->rx.general.mac_id;
949 		data.beacon_filter_average_energy =
950 			stats->general.common.beacon_filter_average_energy;
951 
952 		mvm->rx_stats = stats->rx;
953 
954 		mvm->radio_stats.rx_time =
955 			le64_to_cpu(stats->general.common.rx_time);
956 		mvm->radio_stats.tx_time =
957 			le64_to_cpu(stats->general.common.tx_time);
958 		mvm->radio_stats.on_time_rf =
959 			le64_to_cpu(stats->general.common.on_time_rf);
960 		mvm->radio_stats.on_time_scan =
961 			le64_to_cpu(stats->general.common.on_time_scan);
962 
963 		data.beacon_counter = stats->general.beacon_counter;
964 		data.beacon_average_energy =
965 			stats->general.beacon_average_energy;
966 		flags = stats->flag;
967 	}
968 	data.flags = flags;
969 
970 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
971 
972 	ieee80211_iterate_active_interfaces(mvm->hw,
973 					    IEEE80211_IFACE_ITER_NORMAL,
974 					    iwl_mvm_stat_iterator,
975 					    &data);
976 
977 	if (!iwl_mvm_has_new_rx_api(mvm))
978 		return;
979 
980 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
981 		struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
982 
983 		energy = (void *)&v11->load_stats.avg_energy;
984 		bytes = (void *)&v11->load_stats.byte_count;
985 		air_time = (void *)&v11->load_stats.air_time;
986 	} else {
987 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
988 
989 		energy = (void *)&stats->load_stats.avg_energy;
990 		bytes = (void *)&stats->load_stats.byte_count;
991 		air_time = (void *)&stats->load_stats.air_time;
992 	}
993 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
994 					  energy);
995 
996 	/*
997 	 * Don't update in case the statistics are not cleared, since
998 	 * we will end up counting twice the same airtime, once in TCM
999 	 * request and once in statistics notification.
1000 	 */
1001 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1002 		iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
1003 
1004 }
1005 
1006 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1007 {
1008 	iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
1009 }
1010 
1011 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
1012 				 struct iwl_rx_cmd_buffer *rxb)
1013 {
1014 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1015 	struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
1016 	int i;
1017 
1018 	BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
1019 	BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
1020 	BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
1021 	BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
1022 
1023 	rcu_read_lock();
1024 	for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
1025 		struct ieee80211_sta *sta;
1026 		u8 sta_id, tid;
1027 		u64 bitmap;
1028 		u32 ssn;
1029 		u16 ratid;
1030 		u16 received_mpdu;
1031 
1032 		ratid = le16_to_cpu(notif->ra_tid[i]);
1033 		/* check that this TID is valid */
1034 		if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
1035 			continue;
1036 
1037 		received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
1038 		if (received_mpdu == 0)
1039 			continue;
1040 
1041 		tid = ratid & BA_WINDOW_STATUS_TID_MSK;
1042 		/* get the station */
1043 		sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
1044 			 >> BA_WINDOW_STATUS_STA_ID_POS;
1045 		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1046 		if (IS_ERR_OR_NULL(sta))
1047 			continue;
1048 		bitmap = le64_to_cpu(notif->bitmap[i]);
1049 		ssn = le32_to_cpu(notif->start_seq_num[i]);
1050 
1051 		/* update mac80211 with the bitmap for the reordering buffer */
1052 		ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
1053 						     received_mpdu);
1054 	}
1055 	rcu_read_unlock();
1056 }
1057