1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2022 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 (!mvm->monitor_on)
193 			IWL_ERR(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
194 	}
195 
196 	return 0;
197 }
198 
199 static void iwl_mvm_rx_handle_tcm(struct iwl_mvm *mvm,
200 				  struct ieee80211_sta *sta,
201 				  struct ieee80211_hdr *hdr, u32 len,
202 				  struct iwl_rx_phy_info *phy_info,
203 				  u32 rate_n_flags)
204 {
205 	struct iwl_mvm_sta *mvmsta;
206 	struct iwl_mvm_tcm_mac *mdata;
207 	int mac;
208 	int ac = IEEE80211_AC_BE; /* treat non-QoS as BE */
209 	struct iwl_mvm_vif *mvmvif;
210 	/* expected throughput in 100Kbps, single stream, 20 MHz */
211 	static const u8 thresh_tpt[] = {
212 		9, 18, 30, 42, 60, 78, 90, 96, 120, 135,
213 	};
214 	u16 thr;
215 
216 	if (ieee80211_is_data_qos(hdr->frame_control))
217 		ac = tid_to_mac80211_ac[ieee80211_get_tid(hdr)];
218 
219 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
220 	mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
221 
222 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
223 		schedule_delayed_work(&mvm->tcm.work, 0);
224 	mdata = &mvm->tcm.data[mac];
225 	mdata->rx.pkts[ac]++;
226 
227 	/* count the airtime only once for each ampdu */
228 	if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
229 		mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
230 		mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
231 	}
232 
233 	if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
234 		return;
235 
236 	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
237 
238 	if (mdata->opened_rx_ba_sessions ||
239 	    mdata->uapsd_nonagg_detect.detected ||
240 	    (!mvmvif->queue_params[IEEE80211_AC_VO].uapsd &&
241 	     !mvmvif->queue_params[IEEE80211_AC_VI].uapsd &&
242 	     !mvmvif->queue_params[IEEE80211_AC_BE].uapsd &&
243 	     !mvmvif->queue_params[IEEE80211_AC_BK].uapsd) ||
244 	    mvmsta->sta_id != mvmvif->ap_sta_id)
245 		return;
246 
247 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
248 		thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
249 		thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
250 					RATE_HT_MCS_NSS_POS_V1);
251 	} else {
252 		if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
253 				ARRAY_SIZE(thresh_tpt)))
254 			return;
255 		thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
256 		thr *= 1 + ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
257 					RATE_VHT_MCS_NSS_POS);
258 	}
259 
260 	thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
261 				RATE_MCS_CHAN_WIDTH_POS);
262 
263 	mdata->uapsd_nonagg_detect.rx_bytes += len;
264 	ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
265 }
266 
267 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
268 			    struct sk_buff *skb,
269 			    u32 status)
270 {
271 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
272 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
273 
274 	if (mvmvif->features & NETIF_F_RXCSUM &&
275 	    status & RX_MPDU_RES_STATUS_CSUM_DONE &&
276 	    status & RX_MPDU_RES_STATUS_CSUM_OK)
277 		skb->ip_summed = CHECKSUM_UNNECESSARY;
278 }
279 
280 /*
281  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
282  *
283  * Handles the actual data of the Rx packet from the fw
284  */
285 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
286 			struct iwl_rx_cmd_buffer *rxb)
287 {
288 	struct ieee80211_hdr *hdr;
289 	struct ieee80211_rx_status *rx_status;
290 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
291 	struct iwl_rx_phy_info *phy_info;
292 	struct iwl_rx_mpdu_res_start *rx_res;
293 	struct ieee80211_sta *sta = NULL;
294 	struct sk_buff *skb;
295 	u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
296 	u32 rate_n_flags;
297 	u32 rx_pkt_status;
298 	u8 crypt_len = 0;
299 
300 	if (unlikely(pkt_len < sizeof(*rx_res))) {
301 		IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
302 		return;
303 	}
304 
305 	phy_info = &mvm->last_phy_info;
306 	rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
307 	hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
308 	len = le16_to_cpu(rx_res->byte_count);
309 
310 	if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
311 		IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
312 		return;
313 	}
314 
315 	rx_pkt_status = get_unaligned_le32((__le32 *)
316 		(pkt->data + sizeof(*rx_res) + len));
317 
318 	/* Dont use dev_alloc_skb(), we'll have enough headroom once
319 	 * ieee80211_hdr pulled.
320 	 */
321 	skb = alloc_skb(128, GFP_ATOMIC);
322 	if (!skb) {
323 		IWL_ERR(mvm, "alloc_skb failed\n");
324 		return;
325 	}
326 
327 	rx_status = IEEE80211_SKB_RXCB(skb);
328 
329 	/*
330 	 * Keep packets with CRC errors (and with overrun) for monitor mode
331 	 * (otherwise the firmware discards them) but mark them as bad.
332 	 */
333 	if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
334 	    !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
335 		IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
336 		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
337 	}
338 
339 	/* This will be used in several places later */
340 	rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
341 
342 	/* rx_status carries information about the packet to mac80211 */
343 	rx_status->mactime = le64_to_cpu(phy_info->timestamp);
344 	rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
345 	rx_status->band =
346 		(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
347 				NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
348 	rx_status->freq =
349 		ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
350 					       rx_status->band);
351 
352 	/* TSF as indicated by the firmware  is at INA time */
353 	rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
354 
355 	iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
356 
357 	IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
358 			      (unsigned long long)rx_status->mactime);
359 
360 	rcu_read_lock();
361 	if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
362 		u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
363 
364 		id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
365 
366 		if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
367 			sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
368 			if (IS_ERR(sta))
369 				sta = NULL;
370 		}
371 	} else if (!is_multicast_ether_addr(hdr->addr2)) {
372 		/* This is fine since we prevent two stations with the same
373 		 * address from being added.
374 		 */
375 		sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
376 	}
377 
378 	if (sta) {
379 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
380 		struct ieee80211_vif *vif = mvmsta->vif;
381 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
382 
383 		/*
384 		 * Don't even try to decrypt a MCAST frame that was received
385 		 * before the managed vif is authorized, we'd fail anyway.
386 		 */
387 		if (vif->type == NL80211_IFTYPE_STATION &&
388 		    !mvmvif->authorized &&
389 		    is_multicast_ether_addr(hdr->addr1)) {
390 			IWL_DEBUG_DROP(mvm, "MCAST before the vif is authorized\n");
391 			kfree_skb(skb);
392 			rcu_read_unlock();
393 			return;
394 		}
395 	}
396 
397 	/*
398 	 * drop the packet if it has failed being decrypted by HW
399 	 */
400 	if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
401 					 &crypt_len)) {
402 		IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
403 			       rx_pkt_status);
404 		kfree_skb(skb);
405 		rcu_read_unlock();
406 		return;
407 	}
408 
409 	if (sta) {
410 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
411 		struct ieee80211_vif *tx_blocked_vif =
412 			rcu_dereference(mvm->csa_tx_blocked_vif);
413 		struct iwl_fw_dbg_trigger_tlv *trig;
414 		struct ieee80211_vif *vif = mvmsta->vif;
415 
416 		/* We have tx blocked stations (with CS bit). If we heard
417 		 * frames from a blocked station on a new channel we can
418 		 * TX to it again.
419 		 */
420 		if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
421 			struct iwl_mvm_vif *mvmvif =
422 				iwl_mvm_vif_from_mac80211(tx_blocked_vif);
423 
424 			if (mvmvif->csa_target_freq == rx_status->freq)
425 				iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
426 								 false);
427 		}
428 
429 		rs_update_last_rssi(mvm, mvmsta, rx_status);
430 
431 		trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
432 					     ieee80211_vif_to_wdev(vif),
433 					     FW_DBG_TRIGGER_RSSI);
434 
435 		if (trig && ieee80211_is_beacon(hdr->frame_control)) {
436 			struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
437 			s32 rssi;
438 
439 			rssi_trig = (void *)trig->data;
440 			rssi = le32_to_cpu(rssi_trig->rssi);
441 
442 			if (rx_status->signal < rssi)
443 				iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
444 							NULL);
445 		}
446 
447 		if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
448 		    !is_multicast_ether_addr(hdr->addr1) &&
449 		    ieee80211_is_data(hdr->frame_control))
450 			iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
451 					      rate_n_flags);
452 
453 		if (ieee80211_is_data(hdr->frame_control))
454 			iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
455 	}
456 	rcu_read_unlock();
457 
458 	/* set the preamble flag if appropriate */
459 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
460 		rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
461 
462 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
463 		/*
464 		 * We know which subframes of an A-MPDU belong
465 		 * together since we get a single PHY response
466 		 * from the firmware for all of them
467 		 */
468 		rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
469 		rx_status->ampdu_reference = mvm->ampdu_ref;
470 	}
471 
472 	/* Set up the HT phy flags */
473 	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
474 	case RATE_MCS_CHAN_WIDTH_20:
475 		break;
476 	case RATE_MCS_CHAN_WIDTH_40:
477 		rx_status->bw = RATE_INFO_BW_40;
478 		break;
479 	case RATE_MCS_CHAN_WIDTH_80:
480 		rx_status->bw = RATE_INFO_BW_80;
481 		break;
482 	case RATE_MCS_CHAN_WIDTH_160:
483 		rx_status->bw = RATE_INFO_BW_160;
484 		break;
485 	}
486 	if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
487 	    rate_n_flags & RATE_MCS_SGI_MSK_V1)
488 		rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
489 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
490 		rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
491 	if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
492 		rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
493 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
494 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
495 				RATE_MCS_STBC_POS;
496 		rx_status->encoding = RX_ENC_HT;
497 		rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
498 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
499 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
500 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
501 				RATE_MCS_STBC_POS;
502 		rx_status->nss =
503 			((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
504 						RATE_VHT_MCS_NSS_POS) + 1;
505 		rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
506 		rx_status->encoding = RX_ENC_VHT;
507 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
508 		if (rate_n_flags & RATE_MCS_BF_MSK)
509 			rx_status->enc_flags |= RX_ENC_FLAG_BF;
510 	} else {
511 		int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
512 							       rx_status->band);
513 
514 		if (WARN(rate < 0 || rate > 0xFF,
515 			 "Invalid rate flags 0x%x, band %d,\n",
516 			 rate_n_flags, rx_status->band)) {
517 			kfree_skb(skb);
518 			return;
519 		}
520 		rx_status->rate_idx = rate;
521 	}
522 
523 #ifdef CONFIG_IWLWIFI_DEBUGFS
524 	iwl_mvm_update_frame_stats(mvm, rate_n_flags,
525 				   rx_status->flag & RX_FLAG_AMPDU_DETAILS);
526 #endif
527 
528 	if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
529 		      ieee80211_is_probe_resp(hdr->frame_control)) &&
530 		     mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
531 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
532 
533 	if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
534 		     ieee80211_is_probe_resp(hdr->frame_control)))
535 		rx_status->boottime_ns = ktime_get_boottime_ns();
536 
537 	iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
538 					crypt_len, rxb);
539 }
540 
541 struct iwl_mvm_stat_data {
542 	struct iwl_mvm *mvm;
543 	__le32 flags;
544 	__le32 mac_id;
545 	u8 beacon_filter_average_energy;
546 	__le32 *beacon_counter;
547 	u8 *beacon_average_energy;
548 };
549 
550 struct iwl_mvm_stat_data_all_macs {
551 	struct iwl_mvm *mvm;
552 	__le32 flags;
553 	struct iwl_statistics_ntfy_per_mac *per_mac_stats;
554 };
555 
556 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
557 {
558 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
559 	struct iwl_mvm *mvm = mvmvif->mvm;
560 	int thold = vif->bss_conf.cqm_rssi_thold;
561 	int hyst = vif->bss_conf.cqm_rssi_hyst;
562 	int last_event;
563 
564 	if (sig == 0) {
565 		IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
566 		return;
567 	}
568 
569 	mvmvif->bf_data.ave_beacon_signal = sig;
570 
571 	/* BT Coex */
572 	if (mvmvif->bf_data.bt_coex_min_thold !=
573 	    mvmvif->bf_data.bt_coex_max_thold) {
574 		last_event = mvmvif->bf_data.last_bt_coex_event;
575 		if (sig > mvmvif->bf_data.bt_coex_max_thold &&
576 		    (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
577 		     last_event == 0)) {
578 			mvmvif->bf_data.last_bt_coex_event = sig;
579 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
580 				     sig);
581 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
582 		} else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
583 			   (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
584 			    last_event == 0)) {
585 			mvmvif->bf_data.last_bt_coex_event = sig;
586 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
587 				     sig);
588 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
589 		}
590 	}
591 
592 	if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
593 		return;
594 
595 	/* CQM Notification */
596 	last_event = mvmvif->bf_data.last_cqm_event;
597 	if (thold && sig < thold && (last_event == 0 ||
598 				     sig < last_event - hyst)) {
599 		mvmvif->bf_data.last_cqm_event = sig;
600 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
601 			     sig);
602 		ieee80211_cqm_rssi_notify(
603 			vif,
604 			NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
605 			sig,
606 			GFP_KERNEL);
607 	} else if (sig > thold &&
608 		   (last_event == 0 || sig > last_event + hyst)) {
609 		mvmvif->bf_data.last_cqm_event = sig;
610 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
611 			     sig);
612 		ieee80211_cqm_rssi_notify(
613 			vif,
614 			NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
615 			sig,
616 			GFP_KERNEL);
617 	}
618 }
619 
620 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
621 				  struct ieee80211_vif *vif)
622 {
623 	struct iwl_mvm_stat_data *data = _data;
624 	int sig = -data->beacon_filter_average_energy;
625 	u16 id = le32_to_cpu(data->mac_id);
626 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
627 	u16 vif_id = mvmvif->id;
628 
629 	/* This doesn't need the MAC ID check since it's not taking the
630 	 * data copied into the "data" struct, but rather the data from
631 	 * the notification directly.
632 	 */
633 	mvmvif->beacon_stats.num_beacons =
634 		le32_to_cpu(data->beacon_counter[vif_id]);
635 	mvmvif->beacon_stats.avg_signal =
636 		-data->beacon_average_energy[vif_id];
637 
638 	if (mvmvif->id != id)
639 		return;
640 
641 	if (vif->type != NL80211_IFTYPE_STATION)
642 		return;
643 
644 	/* make sure that beacon statistics don't go backwards with TCM
645 	 * request to clear statistics
646 	 */
647 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
648 		mvmvif->beacon_stats.accu_num_beacons +=
649 			mvmvif->beacon_stats.num_beacons;
650 
651 	iwl_mvm_update_vif_sig(vif, sig);
652 }
653 
654 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
655 					   struct ieee80211_vif *vif)
656 {
657 	struct iwl_mvm_stat_data_all_macs *data = _data;
658 	struct iwl_statistics_ntfy_per_mac *mac_stats;
659 	int sig;
660 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
661 	u16 vif_id = mvmvif->id;
662 
663 	if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
664 		return;
665 
666 	if (vif->type != NL80211_IFTYPE_STATION)
667 		return;
668 
669 	mac_stats = &data->per_mac_stats[vif_id];
670 
671 	mvmvif->beacon_stats.num_beacons =
672 		le32_to_cpu(mac_stats->beacon_counter);
673 	mvmvif->beacon_stats.avg_signal =
674 		-le32_to_cpu(mac_stats->beacon_average_energy);
675 
676 	/* make sure that beacon statistics don't go backwards with TCM
677 	 * request to clear statistics
678 	 */
679 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
680 		mvmvif->beacon_stats.accu_num_beacons +=
681 			mvmvif->beacon_stats.num_beacons;
682 
683 	sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
684 	iwl_mvm_update_vif_sig(vif, sig);
685 }
686 
687 static inline void
688 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
689 {
690 	struct iwl_fw_dbg_trigger_tlv *trig;
691 	struct iwl_fw_dbg_trigger_stats *trig_stats;
692 	u32 trig_offset, trig_thold;
693 
694 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
695 	if (!trig)
696 		return;
697 
698 	trig_stats = (void *)trig->data;
699 
700 	trig_offset = le32_to_cpu(trig_stats->stop_offset);
701 	trig_thold = le32_to_cpu(trig_stats->stop_threshold);
702 
703 	if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
704 		return;
705 
706 	if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
707 		return;
708 
709 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
710 }
711 
712 static void iwl_mvm_stats_energy_iter(void *_data,
713 				      struct ieee80211_sta *sta)
714 {
715 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
716 	u8 *energy = _data;
717 	u32 sta_id = mvmsta->sta_id;
718 
719 	if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
720 		      sta_id, IWL_MVM_STATION_COUNT_MAX))
721 		return;
722 
723 	if (energy[sta_id])
724 		mvmsta->avg_energy = energy[sta_id];
725 
726 }
727 
728 static void
729 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
730 			      __le32 *rx_bytes_le)
731 {
732 	int i;
733 
734 	spin_lock(&mvm->tcm.lock);
735 	for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
736 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
737 		u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
738 		u32 airtime = le32_to_cpu(air_time_le[i]);
739 
740 		mdata->rx.airtime += airtime;
741 		mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
742 		if (airtime) {
743 			/* re-init every time to store rate from FW */
744 			ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
745 			ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
746 				      rx_bytes * 8 / airtime);
747 		}
748 	}
749 	spin_unlock(&mvm->tcm.lock);
750 }
751 
752 static void
753 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
754 		     struct iwl_statistics_operational_ntfy *stats)
755 {
756 	struct iwl_mvm_stat_data_all_macs data = {
757 		.mvm = mvm,
758 		.flags = stats->flags,
759 		.per_mac_stats = stats->per_mac_stats,
760 	};
761 
762 	ieee80211_iterate_active_interfaces(mvm->hw,
763 					    IEEE80211_IFACE_ITER_NORMAL,
764 					    iwl_mvm_stat_iterator_all_macs,
765 					    &data);
766 }
767 
768 static void
769 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
770 		     struct iwl_statistics_operational_ntfy_ver_14 *stats)
771 {
772 	struct iwl_mvm_stat_data data = {
773 		.mvm = mvm,
774 	};
775 
776 	u8 beacon_average_energy[MAC_INDEX_AUX];
777 	__le32 flags;
778 	int i;
779 
780 	flags = stats->flags;
781 
782 	data.mac_id = stats->mac_id;
783 	data.beacon_filter_average_energy =
784 		le32_to_cpu(stats->beacon_filter_average_energy);
785 	data.flags = flags;
786 	data.beacon_counter = stats->beacon_counter;
787 
788 	for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
789 		beacon_average_energy[i] =
790 			le32_to_cpu(stats->beacon_average_energy[i]);
791 
792 	data.beacon_average_energy = beacon_average_energy;
793 
794 	ieee80211_iterate_active_interfaces(mvm->hw,
795 					    IEEE80211_IFACE_ITER_NORMAL,
796 					    iwl_mvm_stat_iterator,
797 					    &data);
798 }
799 
800 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
801 				     struct iwl_rx_packet *pkt,
802 				     u32 expected_size)
803 {
804 	struct iwl_statistics_ntfy_hdr *hdr;
805 
806 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
807 		      "received invalid statistics size (%d)!, expected_size: %d\n",
808 		      iwl_rx_packet_payload_len(pkt), expected_size))
809 		return false;
810 
811 	hdr = (void *)&pkt->data;
812 
813 	if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
814 		      hdr->version !=
815 		      iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
816 		      "received unsupported hdr type %d, version %d\n",
817 		      hdr->type, hdr->version))
818 		return false;
819 
820 	if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
821 		      "received invalid statistics size in header (%d)!, expected_size: %d\n",
822 		      le16_to_cpu(hdr->size), expected_size))
823 		return false;
824 
825 	return true;
826 }
827 
828 static void
829 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
830 				 struct iwl_rx_packet *pkt)
831 {
832 	u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
833 	__le32 air_time[MAC_INDEX_AUX];
834 	__le32 rx_bytes[MAC_INDEX_AUX];
835 	__le32 flags = 0;
836 	int i;
837 	u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
838 					      STATISTICS_NOTIFICATION, 0);
839 
840 	if (WARN_ONCE(notif_ver > 15,
841 		      "invalid statistics version id: %d\n", notif_ver))
842 		return;
843 
844 	if (notif_ver == 14) {
845 		struct iwl_statistics_operational_ntfy_ver_14 *stats =
846 			(void *)pkt->data;
847 
848 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
849 			return;
850 
851 		iwl_mvm_stats_ver_14(mvm, stats);
852 
853 		flags = stats->flags;
854 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
855 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
856 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
857 		mvm->radio_stats.on_time_scan =
858 			le64_to_cpu(stats->on_time_scan);
859 
860 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
861 			average_energy[i] = le32_to_cpu(stats->average_energy[i]);
862 
863 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
864 			air_time[i] = stats->air_time[i];
865 			rx_bytes[i] = stats->rx_bytes[i];
866 		}
867 	}
868 
869 	if (notif_ver == 15) {
870 		struct iwl_statistics_operational_ntfy *stats =
871 			(void *)pkt->data;
872 
873 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
874 			return;
875 
876 		iwl_mvm_stats_ver_15(mvm, stats);
877 
878 		flags = stats->flags;
879 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
880 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
881 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
882 		mvm->radio_stats.on_time_scan =
883 			le64_to_cpu(stats->on_time_scan);
884 
885 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
886 			average_energy[i] =
887 				le32_to_cpu(stats->per_sta_stats[i].average_energy);
888 
889 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
890 			air_time[i] = stats->per_mac_stats[i].air_time;
891 			rx_bytes[i] = stats->per_mac_stats[i].rx_bytes;
892 		}
893 	}
894 
895 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
896 
897 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
898 					  average_energy);
899 	/*
900 	 * Don't update in case the statistics are not cleared, since
901 	 * we will end up counting twice the same airtime, once in TCM
902 	 * request and once in statistics notification.
903 	 */
904 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
905 		iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
906 }
907 
908 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
909 				  struct iwl_rx_packet *pkt)
910 {
911 	struct iwl_mvm_stat_data data = {
912 		.mvm = mvm,
913 	};
914 	__le32 *bytes, *air_time, flags;
915 	int expected_size;
916 	u8 *energy;
917 
918 	/* From ver 14 and up we use TLV statistics format */
919 	if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
920 				    STATISTICS_NOTIFICATION, 0) >= 14)
921 		return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
922 
923 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
924 		if (iwl_mvm_has_new_rx_api(mvm))
925 			expected_size = sizeof(struct iwl_notif_statistics_v11);
926 		else
927 			expected_size = sizeof(struct iwl_notif_statistics_v10);
928 	} else {
929 		expected_size = sizeof(struct iwl_notif_statistics);
930 	}
931 
932 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
933 		      "received invalid statistics size (%d)!\n",
934 		      iwl_rx_packet_payload_len(pkt)))
935 		return;
936 
937 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
938 		struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
939 
940 		data.mac_id = stats->rx.general.mac_id;
941 		data.beacon_filter_average_energy =
942 			stats->general.common.beacon_filter_average_energy;
943 
944 		mvm->rx_stats_v3 = stats->rx;
945 
946 		mvm->radio_stats.rx_time =
947 			le64_to_cpu(stats->general.common.rx_time);
948 		mvm->radio_stats.tx_time =
949 			le64_to_cpu(stats->general.common.tx_time);
950 		mvm->radio_stats.on_time_rf =
951 			le64_to_cpu(stats->general.common.on_time_rf);
952 		mvm->radio_stats.on_time_scan =
953 			le64_to_cpu(stats->general.common.on_time_scan);
954 
955 		data.beacon_counter = stats->general.beacon_counter;
956 		data.beacon_average_energy =
957 			stats->general.beacon_average_energy;
958 		flags = stats->flag;
959 	} else {
960 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
961 
962 		data.mac_id = stats->rx.general.mac_id;
963 		data.beacon_filter_average_energy =
964 			stats->general.common.beacon_filter_average_energy;
965 
966 		mvm->rx_stats = stats->rx;
967 
968 		mvm->radio_stats.rx_time =
969 			le64_to_cpu(stats->general.common.rx_time);
970 		mvm->radio_stats.tx_time =
971 			le64_to_cpu(stats->general.common.tx_time);
972 		mvm->radio_stats.on_time_rf =
973 			le64_to_cpu(stats->general.common.on_time_rf);
974 		mvm->radio_stats.on_time_scan =
975 			le64_to_cpu(stats->general.common.on_time_scan);
976 
977 		data.beacon_counter = stats->general.beacon_counter;
978 		data.beacon_average_energy =
979 			stats->general.beacon_average_energy;
980 		flags = stats->flag;
981 	}
982 	data.flags = flags;
983 
984 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
985 
986 	ieee80211_iterate_active_interfaces(mvm->hw,
987 					    IEEE80211_IFACE_ITER_NORMAL,
988 					    iwl_mvm_stat_iterator,
989 					    &data);
990 
991 	if (!iwl_mvm_has_new_rx_api(mvm))
992 		return;
993 
994 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
995 		struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
996 
997 		energy = (void *)&v11->load_stats.avg_energy;
998 		bytes = (void *)&v11->load_stats.byte_count;
999 		air_time = (void *)&v11->load_stats.air_time;
1000 	} else {
1001 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
1002 
1003 		energy = (void *)&stats->load_stats.avg_energy;
1004 		bytes = (void *)&stats->load_stats.byte_count;
1005 		air_time = (void *)&stats->load_stats.air_time;
1006 	}
1007 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
1008 					  energy);
1009 
1010 	/*
1011 	 * Don't update in case the statistics are not cleared, since
1012 	 * we will end up counting twice the same airtime, once in TCM
1013 	 * request and once in statistics notification.
1014 	 */
1015 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1016 		iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
1017 
1018 }
1019 
1020 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1021 {
1022 	iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
1023 }
1024 
1025 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
1026 				 struct iwl_rx_cmd_buffer *rxb)
1027 {
1028 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1029 	struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
1030 	int i;
1031 
1032 	BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
1033 	BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
1034 	BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
1035 	BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
1036 
1037 	rcu_read_lock();
1038 	for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
1039 		struct ieee80211_sta *sta;
1040 		u8 sta_id, tid;
1041 		u64 bitmap;
1042 		u32 ssn;
1043 		u16 ratid;
1044 		u16 received_mpdu;
1045 
1046 		ratid = le16_to_cpu(notif->ra_tid[i]);
1047 		/* check that this TID is valid */
1048 		if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
1049 			continue;
1050 
1051 		received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
1052 		if (received_mpdu == 0)
1053 			continue;
1054 
1055 		tid = ratid & BA_WINDOW_STATUS_TID_MSK;
1056 		/* get the station */
1057 		sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
1058 			 >> BA_WINDOW_STATUS_STA_ID_POS;
1059 		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1060 		if (IS_ERR_OR_NULL(sta))
1061 			continue;
1062 		bitmap = le64_to_cpu(notif->bitmap[i]);
1063 		ssn = le32_to_cpu(notif->start_seq_num[i]);
1064 
1065 		/* update mac80211 with the bitmap for the reordering buffer */
1066 		ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
1067 						     received_mpdu);
1068 	}
1069 	rcu_read_unlock();
1070 }
1071