1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2023 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  */
iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)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  */
iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct napi_struct * napi,struct sk_buff * skb,struct ieee80211_hdr * hdr,u16 len,u8 crypt_len,struct iwl_rx_cmd_buffer * rxb)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  */
iwl_mvm_get_signal_strength(struct iwl_mvm * mvm,struct iwl_rx_phy_info * phy_info,struct ieee80211_rx_status * rx_status)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  */
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)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_WARN(mvm, "Unhandled alg: 0x%x\n", rx_pkt_status);
194 	}
195 
196 	return 0;
197 }
198 
iwl_mvm_rx_handle_tcm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,struct ieee80211_hdr * hdr,u32 len,struct iwl_rx_phy_info * phy_info,u32 rate_n_flags)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 		u8 tid = ieee80211_get_tid(hdr);
218 
219 		if (tid < IWL_MAX_TID_COUNT)
220 			ac = tid_to_mac80211_ac[tid];
221 	}
222 
223 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
224 	mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
225 
226 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
227 		schedule_delayed_work(&mvm->tcm.work, 0);
228 	mdata = &mvm->tcm.data[mac];
229 	mdata->rx.pkts[ac]++;
230 
231 	/* count the airtime only once for each ampdu */
232 	if (mdata->rx.last_ampdu_ref != mvm->ampdu_ref) {
233 		mdata->rx.last_ampdu_ref = mvm->ampdu_ref;
234 		mdata->rx.airtime += le16_to_cpu(phy_info->frame_time);
235 	}
236 
237 	if (!(rate_n_flags & (RATE_MCS_HT_MSK_V1 | RATE_MCS_VHT_MSK_V1)))
238 		return;
239 
240 	mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
241 
242 	if (mdata->opened_rx_ba_sessions ||
243 	    mdata->uapsd_nonagg_detect.detected ||
244 	    (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
245 	     !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
246 	     !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
247 	     !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd) ||
248 	    mvmsta->deflink.sta_id != mvmvif->deflink.ap_sta_id)
249 		return;
250 
251 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
252 		thr = thresh_tpt[rate_n_flags & RATE_HT_MCS_RATE_CODE_MSK_V1];
253 		thr *= 1 + ((rate_n_flags & RATE_HT_MCS_NSS_MSK_V1) >>
254 					RATE_HT_MCS_NSS_POS_V1);
255 	} else {
256 		if (WARN_ON((rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK) >=
257 				ARRAY_SIZE(thresh_tpt)))
258 			return;
259 		thr = thresh_tpt[rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK];
260 		thr *= 1 + FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags);
261 	}
262 
263 	thr <<= ((rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) >>
264 				RATE_MCS_CHAN_WIDTH_POS);
265 
266 	mdata->uapsd_nonagg_detect.rx_bytes += len;
267 	ewma_rate_add(&mdata->uapsd_nonagg_detect.rate, thr);
268 }
269 
iwl_mvm_rx_csum(struct ieee80211_sta * sta,struct sk_buff * skb,u32 status)270 static void iwl_mvm_rx_csum(struct ieee80211_sta *sta,
271 			    struct sk_buff *skb,
272 			    u32 status)
273 {
274 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
275 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
276 
277 	if (mvmvif->features & NETIF_F_RXCSUM &&
278 	    status & RX_MPDU_RES_STATUS_CSUM_DONE &&
279 	    status & RX_MPDU_RES_STATUS_CSUM_OK)
280 		skb->ip_summed = CHECKSUM_UNNECESSARY;
281 }
282 
283 /*
284  * iwl_mvm_rx_rx_mpdu - REPLY_RX_MPDU_CMD handler
285  *
286  * Handles the actual data of the Rx packet from the fw
287  */
iwl_mvm_rx_rx_mpdu(struct iwl_mvm * mvm,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)288 void iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct napi_struct *napi,
289 			struct iwl_rx_cmd_buffer *rxb)
290 {
291 	struct ieee80211_hdr *hdr;
292 	struct ieee80211_rx_status *rx_status;
293 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
294 	struct iwl_rx_phy_info *phy_info;
295 	struct iwl_rx_mpdu_res_start *rx_res;
296 	struct ieee80211_sta *sta = NULL;
297 	struct sk_buff *skb;
298 	u32 len, pkt_len = iwl_rx_packet_payload_len(pkt);
299 	u32 rate_n_flags;
300 	u32 rx_pkt_status;
301 	u8 crypt_len = 0;
302 
303 	if (unlikely(pkt_len < sizeof(*rx_res))) {
304 		IWL_DEBUG_DROP(mvm, "Bad REPLY_RX_MPDU_CMD size\n");
305 		return;
306 	}
307 
308 	phy_info = &mvm->last_phy_info;
309 	rx_res = (struct iwl_rx_mpdu_res_start *)pkt->data;
310 	hdr = (struct ieee80211_hdr *)(pkt->data + sizeof(*rx_res));
311 	len = le16_to_cpu(rx_res->byte_count);
312 
313 	if (unlikely(len + sizeof(*rx_res) + sizeof(__le32) > pkt_len)) {
314 		IWL_DEBUG_DROP(mvm, "FW lied about packet len\n");
315 		return;
316 	}
317 
318 	rx_pkt_status = get_unaligned_le32((__le32 *)
319 		(pkt->data + sizeof(*rx_res) + len));
320 
321 	/* Dont use dev_alloc_skb(), we'll have enough headroom once
322 	 * ieee80211_hdr pulled.
323 	 */
324 	skb = alloc_skb(128, GFP_ATOMIC);
325 	if (!skb) {
326 		IWL_ERR(mvm, "alloc_skb failed\n");
327 		return;
328 	}
329 
330 	rx_status = IEEE80211_SKB_RXCB(skb);
331 
332 	/*
333 	 * Keep packets with CRC errors (and with overrun) for monitor mode
334 	 * (otherwise the firmware discards them) but mark them as bad.
335 	 */
336 	if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
337 	    !(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
338 		IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
339 		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
340 	}
341 
342 	/* This will be used in several places later */
343 	rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
344 
345 	/* rx_status carries information about the packet to mac80211 */
346 	rx_status->mactime = le64_to_cpu(phy_info->timestamp);
347 	rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
348 	rx_status->band =
349 		(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
350 				NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
351 	rx_status->freq =
352 		ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
353 					       rx_status->band);
354 
355 	/* TSF as indicated by the firmware  is at INA time */
356 	rx_status->flag |= RX_FLAG_MACTIME_PLCP_START;
357 
358 	iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
359 
360 	IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
361 			      (unsigned long long)rx_status->mactime);
362 
363 	rcu_read_lock();
364 	if (rx_pkt_status & RX_MPDU_RES_STATUS_SRC_STA_FOUND) {
365 		u32 id = rx_pkt_status & RX_MPDU_RES_STATUS_STA_ID_MSK;
366 
367 		id >>= RX_MDPU_RES_STATUS_STA_ID_SHIFT;
368 
369 		if (!WARN_ON_ONCE(id >= mvm->fw->ucode_capa.num_stations)) {
370 			sta = rcu_dereference(mvm->fw_id_to_mac_id[id]);
371 			if (IS_ERR(sta))
372 				sta = NULL;
373 		}
374 	} else if (!is_multicast_ether_addr(hdr->addr2)) {
375 		/* This is fine since we prevent two stations with the same
376 		 * address from being added.
377 		 */
378 		sta = ieee80211_find_sta_by_ifaddr(mvm->hw, hdr->addr2, NULL);
379 	}
380 
381 	if (sta) {
382 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
383 		struct ieee80211_vif *vif = mvmsta->vif;
384 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
385 
386 		/*
387 		 * Don't even try to decrypt a MCAST frame that was received
388 		 * before the managed vif is authorized, we'd fail anyway.
389 		 */
390 		if (is_multicast_ether_addr(hdr->addr1) &&
391 		    vif->type == NL80211_IFTYPE_STATION &&
392 		    !mvmvif->authorized &&
393 		    ieee80211_has_protected(hdr->frame_control)) {
394 			IWL_DEBUG_DROP(mvm, "MCAST before the vif is authorized\n");
395 			kfree_skb(skb);
396 			rcu_read_unlock();
397 			return;
398 		}
399 	}
400 
401 	/*
402 	 * drop the packet if it has failed being decrypted by HW
403 	 */
404 	if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status,
405 					 &crypt_len)) {
406 		IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
407 			       rx_pkt_status);
408 		kfree_skb(skb);
409 		rcu_read_unlock();
410 		return;
411 	}
412 
413 	if (sta) {
414 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
415 		struct ieee80211_vif *tx_blocked_vif =
416 			rcu_dereference(mvm->csa_tx_blocked_vif);
417 		struct iwl_fw_dbg_trigger_tlv *trig;
418 		struct ieee80211_vif *vif = mvmsta->vif;
419 
420 		/* We have tx blocked stations (with CS bit). If we heard
421 		 * frames from a blocked station on a new channel we can
422 		 * TX to it again.
423 		 */
424 		if (unlikely(tx_blocked_vif) && vif == tx_blocked_vif) {
425 			struct iwl_mvm_vif *mvmvif =
426 				iwl_mvm_vif_from_mac80211(tx_blocked_vif);
427 
428 			if (mvmvif->csa_target_freq == rx_status->freq)
429 				iwl_mvm_sta_modify_disable_tx_ap(mvm, sta,
430 								 false);
431 		}
432 
433 		rs_update_last_rssi(mvm, mvmsta, rx_status);
434 
435 		trig = iwl_fw_dbg_trigger_on(&mvm->fwrt,
436 					     ieee80211_vif_to_wdev(vif),
437 					     FW_DBG_TRIGGER_RSSI);
438 
439 		if (trig && ieee80211_is_beacon(hdr->frame_control)) {
440 			struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
441 			s32 rssi;
442 
443 			rssi_trig = (void *)trig->data;
444 			rssi = le32_to_cpu(rssi_trig->rssi);
445 
446 			if (rx_status->signal < rssi)
447 				iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
448 							NULL);
449 		}
450 
451 		if (!mvm->tcm.paused && len >= sizeof(*hdr) &&
452 		    !is_multicast_ether_addr(hdr->addr1) &&
453 		    ieee80211_is_data(hdr->frame_control))
454 			iwl_mvm_rx_handle_tcm(mvm, sta, hdr, len, phy_info,
455 					      rate_n_flags);
456 
457 		if (ieee80211_is_data(hdr->frame_control))
458 			iwl_mvm_rx_csum(sta, skb, rx_pkt_status);
459 	}
460 	rcu_read_unlock();
461 
462 	/* set the preamble flag if appropriate */
463 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
464 		rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
465 
466 	if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
467 		/*
468 		 * We know which subframes of an A-MPDU belong
469 		 * together since we get a single PHY response
470 		 * from the firmware for all of them
471 		 */
472 		rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
473 		rx_status->ampdu_reference = mvm->ampdu_ref;
474 	}
475 
476 	/* Set up the HT phy flags */
477 	switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK_V1) {
478 	case RATE_MCS_CHAN_WIDTH_20:
479 		break;
480 	case RATE_MCS_CHAN_WIDTH_40:
481 		rx_status->bw = RATE_INFO_BW_40;
482 		break;
483 	case RATE_MCS_CHAN_WIDTH_80:
484 		rx_status->bw = RATE_INFO_BW_80;
485 		break;
486 	case RATE_MCS_CHAN_WIDTH_160:
487 		rx_status->bw = RATE_INFO_BW_160;
488 		break;
489 	}
490 	if (!(rate_n_flags & RATE_MCS_CCK_MSK_V1) &&
491 	    rate_n_flags & RATE_MCS_SGI_MSK_V1)
492 		rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
493 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
494 		rx_status->enc_flags |= RX_ENC_FLAG_HT_GF;
495 	if (rate_n_flags & RATE_MCS_LDPC_MSK_V1)
496 		rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
497 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
498 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
499 				RATE_MCS_STBC_POS;
500 		rx_status->encoding = RX_ENC_HT;
501 		rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
502 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
503 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
504 		u8 stbc = (rate_n_flags & RATE_MCS_STBC_MSK) >>
505 				RATE_MCS_STBC_POS;
506 		rx_status->nss =
507 			FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1;
508 		rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
509 		rx_status->encoding = RX_ENC_VHT;
510 		rx_status->enc_flags |= stbc << RX_ENC_FLAG_STBC_SHIFT;
511 		if (rate_n_flags & RATE_MCS_BF_MSK)
512 			rx_status->enc_flags |= RX_ENC_FLAG_BF;
513 	} else {
514 		int rate = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
515 							       rx_status->band);
516 
517 		if (WARN(rate < 0 || rate > 0xFF,
518 			 "Invalid rate flags 0x%x, band %d,\n",
519 			 rate_n_flags, rx_status->band)) {
520 			kfree_skb(skb);
521 			return;
522 		}
523 		rx_status->rate_idx = rate;
524 	}
525 
526 #ifdef CONFIG_IWLWIFI_DEBUGFS
527 	iwl_mvm_update_frame_stats(mvm, rate_n_flags,
528 				   rx_status->flag & RX_FLAG_AMPDU_DETAILS);
529 #endif
530 
531 	if (unlikely((ieee80211_is_beacon(hdr->frame_control) ||
532 		      ieee80211_is_probe_resp(hdr->frame_control)) &&
533 		     mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED))
534 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_FOUND;
535 
536 	if (unlikely(ieee80211_is_beacon(hdr->frame_control) ||
537 		     ieee80211_is_probe_resp(hdr->frame_control)))
538 		rx_status->boottime_ns = ktime_get_boottime_ns();
539 
540 	iwl_mvm_pass_packet_to_mac80211(mvm, sta, napi, skb, hdr, len,
541 					crypt_len, rxb);
542 }
543 
544 struct iwl_mvm_stat_data {
545 	struct iwl_mvm *mvm;
546 	__le32 flags;
547 	__le32 mac_id;
548 	u8 beacon_filter_average_energy;
549 	__le32 *beacon_counter;
550 	u8 *beacon_average_energy;
551 };
552 
553 struct iwl_mvm_stat_data_all_macs {
554 	struct iwl_mvm *mvm;
555 	__le32 flags;
556 	struct iwl_statistics_ntfy_per_mac *per_mac_stats;
557 };
558 
iwl_mvm_update_vif_sig(struct ieee80211_vif * vif,int sig)559 static void iwl_mvm_update_vif_sig(struct ieee80211_vif *vif, int sig)
560 {
561 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
562 	struct iwl_mvm *mvm = mvmvif->mvm;
563 	int thold = vif->bss_conf.cqm_rssi_thold;
564 	int hyst = vif->bss_conf.cqm_rssi_hyst;
565 	int last_event;
566 
567 	if (sig == 0) {
568 		IWL_DEBUG_RX(mvm, "RSSI is 0 - skip signal based decision\n");
569 		return;
570 	}
571 
572 	mvmvif->bf_data.ave_beacon_signal = sig;
573 
574 	/* BT Coex */
575 	if (mvmvif->bf_data.bt_coex_min_thold !=
576 	    mvmvif->bf_data.bt_coex_max_thold) {
577 		last_event = mvmvif->bf_data.last_bt_coex_event;
578 		if (sig > mvmvif->bf_data.bt_coex_max_thold &&
579 		    (last_event <= mvmvif->bf_data.bt_coex_min_thold ||
580 		     last_event == 0)) {
581 			mvmvif->bf_data.last_bt_coex_event = sig;
582 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex high %d\n",
583 				     sig);
584 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_HIGH);
585 		} else if (sig < mvmvif->bf_data.bt_coex_min_thold &&
586 			   (last_event >= mvmvif->bf_data.bt_coex_max_thold ||
587 			    last_event == 0)) {
588 			mvmvif->bf_data.last_bt_coex_event = sig;
589 			IWL_DEBUG_RX(mvm, "cqm_iterator bt coex low %d\n",
590 				     sig);
591 			iwl_mvm_bt_rssi_event(mvm, vif, RSSI_EVENT_LOW);
592 		}
593 	}
594 
595 	if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
596 		return;
597 
598 	/* CQM Notification */
599 	last_event = mvmvif->bf_data.last_cqm_event;
600 	if (thold && sig < thold && (last_event == 0 ||
601 				     sig < last_event - hyst)) {
602 		mvmvif->bf_data.last_cqm_event = sig;
603 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
604 			     sig);
605 		ieee80211_cqm_rssi_notify(
606 			vif,
607 			NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
608 			sig,
609 			GFP_KERNEL);
610 	} else if (sig > thold &&
611 		   (last_event == 0 || sig > last_event + hyst)) {
612 		mvmvif->bf_data.last_cqm_event = sig;
613 		IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
614 			     sig);
615 		ieee80211_cqm_rssi_notify(
616 			vif,
617 			NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
618 			sig,
619 			GFP_KERNEL);
620 	}
621 }
622 
iwl_mvm_stat_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)623 static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
624 				  struct ieee80211_vif *vif)
625 {
626 	struct iwl_mvm_stat_data *data = _data;
627 	int sig = -data->beacon_filter_average_energy;
628 	u16 id = le32_to_cpu(data->mac_id);
629 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
630 	u16 vif_id = mvmvif->id;
631 
632 	/* This doesn't need the MAC ID check since it's not taking the
633 	 * data copied into the "data" struct, but rather the data from
634 	 * the notification directly.
635 	 */
636 	mvmvif->deflink.beacon_stats.num_beacons =
637 		le32_to_cpu(data->beacon_counter[vif_id]);
638 	mvmvif->deflink.beacon_stats.avg_signal =
639 		-data->beacon_average_energy[vif_id];
640 
641 	if (mvmvif->id != id)
642 		return;
643 
644 	if (vif->type != NL80211_IFTYPE_STATION)
645 		return;
646 
647 	/* make sure that beacon statistics don't go backwards with TCM
648 	 * request to clear statistics
649 	 */
650 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
651 		mvmvif->deflink.beacon_stats.accu_num_beacons +=
652 			mvmvif->deflink.beacon_stats.num_beacons;
653 
654 	iwl_mvm_update_vif_sig(vif, sig);
655 }
656 
iwl_mvm_stat_iterator_all_macs(void * _data,u8 * mac,struct ieee80211_vif * vif)657 static void iwl_mvm_stat_iterator_all_macs(void *_data, u8 *mac,
658 					   struct ieee80211_vif *vif)
659 {
660 	struct iwl_mvm_stat_data_all_macs *data = _data;
661 	struct iwl_statistics_ntfy_per_mac *mac_stats;
662 	int sig;
663 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
664 	u16 vif_id = mvmvif->id;
665 
666 	if (WARN_ONCE(vif_id >= MAC_INDEX_AUX, "invalid vif id: %d", vif_id))
667 		return;
668 
669 	if (vif->type != NL80211_IFTYPE_STATION)
670 		return;
671 
672 	mac_stats = &data->per_mac_stats[vif_id];
673 
674 	mvmvif->deflink.beacon_stats.num_beacons =
675 		le32_to_cpu(mac_stats->beacon_counter);
676 	mvmvif->deflink.beacon_stats.avg_signal =
677 		-le32_to_cpu(mac_stats->beacon_average_energy);
678 
679 	/* make sure that beacon statistics don't go backwards with TCM
680 	 * request to clear statistics
681 	 */
682 	if (le32_to_cpu(data->flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
683 		mvmvif->deflink.beacon_stats.accu_num_beacons +=
684 			mvmvif->deflink.beacon_stats.num_beacons;
685 
686 	sig = -le32_to_cpu(mac_stats->beacon_filter_average_energy);
687 	iwl_mvm_update_vif_sig(vif, sig);
688 }
689 
690 static inline void
iwl_mvm_rx_stats_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)691 iwl_mvm_rx_stats_check_trigger(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
692 {
693 	struct iwl_fw_dbg_trigger_tlv *trig;
694 	struct iwl_fw_dbg_trigger_stats *trig_stats;
695 	u32 trig_offset, trig_thold;
696 
697 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_STATS);
698 	if (!trig)
699 		return;
700 
701 	trig_stats = (void *)trig->data;
702 
703 	trig_offset = le32_to_cpu(trig_stats->stop_offset);
704 	trig_thold = le32_to_cpu(trig_stats->stop_threshold);
705 
706 	if (WARN_ON_ONCE(trig_offset >= iwl_rx_packet_payload_len(pkt)))
707 		return;
708 
709 	if (le32_to_cpup((__le32 *) (pkt->data + trig_offset)) < trig_thold)
710 		return;
711 
712 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, NULL);
713 }
714 
iwl_mvm_stats_energy_iter(void * _data,struct ieee80211_sta * sta)715 static void iwl_mvm_stats_energy_iter(void *_data,
716 				      struct ieee80211_sta *sta)
717 {
718 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
719 	u8 *energy = _data;
720 	u32 sta_id = mvmsta->deflink.sta_id;
721 
722 	if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT_MAX, "sta_id %d >= %d",
723 		      sta_id, IWL_MVM_STATION_COUNT_MAX))
724 		return;
725 
726 	if (energy[sta_id])
727 		mvmsta->deflink.avg_energy = energy[sta_id];
728 
729 }
730 
731 static void
iwl_mvm_update_tcm_from_stats(struct iwl_mvm * mvm,__le32 * air_time_le,__le32 * rx_bytes_le)732 iwl_mvm_update_tcm_from_stats(struct iwl_mvm *mvm, __le32 *air_time_le,
733 			      __le32 *rx_bytes_le)
734 {
735 	int i;
736 
737 	spin_lock(&mvm->tcm.lock);
738 	for (i = 0; i < NUM_MAC_INDEX_DRIVER; i++) {
739 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[i];
740 		u32 rx_bytes = le32_to_cpu(rx_bytes_le[i]);
741 		u32 airtime = le32_to_cpu(air_time_le[i]);
742 
743 		mdata->rx.airtime += airtime;
744 		mdata->uapsd_nonagg_detect.rx_bytes += rx_bytes;
745 		if (airtime) {
746 			/* re-init every time to store rate from FW */
747 			ewma_rate_init(&mdata->uapsd_nonagg_detect.rate);
748 			ewma_rate_add(&mdata->uapsd_nonagg_detect.rate,
749 				      rx_bytes * 8 / airtime);
750 		}
751 	}
752 	spin_unlock(&mvm->tcm.lock);
753 }
754 
755 static void
iwl_mvm_stats_ver_15(struct iwl_mvm * mvm,struct iwl_statistics_operational_ntfy * stats)756 iwl_mvm_stats_ver_15(struct iwl_mvm *mvm,
757 		     struct iwl_statistics_operational_ntfy *stats)
758 {
759 	struct iwl_mvm_stat_data_all_macs data = {
760 		.mvm = mvm,
761 		.flags = stats->flags,
762 		.per_mac_stats = stats->per_mac_stats,
763 	};
764 
765 	ieee80211_iterate_active_interfaces(mvm->hw,
766 					    IEEE80211_IFACE_ITER_NORMAL,
767 					    iwl_mvm_stat_iterator_all_macs,
768 					    &data);
769 }
770 
771 static void
iwl_mvm_stats_ver_14(struct iwl_mvm * mvm,struct iwl_statistics_operational_ntfy_ver_14 * stats)772 iwl_mvm_stats_ver_14(struct iwl_mvm *mvm,
773 		     struct iwl_statistics_operational_ntfy_ver_14 *stats)
774 {
775 	struct iwl_mvm_stat_data data = {
776 		.mvm = mvm,
777 	};
778 
779 	u8 beacon_average_energy[MAC_INDEX_AUX];
780 	__le32 flags;
781 	int i;
782 
783 	flags = stats->flags;
784 
785 	data.mac_id = stats->mac_id;
786 	data.beacon_filter_average_energy =
787 		le32_to_cpu(stats->beacon_filter_average_energy);
788 	data.flags = flags;
789 	data.beacon_counter = stats->beacon_counter;
790 
791 	for (i = 0; i < ARRAY_SIZE(beacon_average_energy); i++)
792 		beacon_average_energy[i] =
793 			le32_to_cpu(stats->beacon_average_energy[i]);
794 
795 	data.beacon_average_energy = beacon_average_energy;
796 
797 	ieee80211_iterate_active_interfaces(mvm->hw,
798 					    IEEE80211_IFACE_ITER_NORMAL,
799 					    iwl_mvm_stat_iterator,
800 					    &data);
801 }
802 
iwl_mvm_verify_stats_len(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt,u32 expected_size)803 static bool iwl_mvm_verify_stats_len(struct iwl_mvm *mvm,
804 				     struct iwl_rx_packet *pkt,
805 				     u32 expected_size)
806 {
807 	struct iwl_statistics_ntfy_hdr *hdr;
808 
809 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) < expected_size,
810 		      "received invalid statistics size (%d)!, expected_size: %d\n",
811 		      iwl_rx_packet_payload_len(pkt), expected_size))
812 		return false;
813 
814 	hdr = (void *)&pkt->data;
815 
816 	if (WARN_ONCE((hdr->type & IWL_STATISTICS_TYPE_MSK) != FW_STATISTICS_OPERATIONAL ||
817 		      hdr->version !=
818 		      iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP, STATISTICS_NOTIFICATION, 0),
819 		      "received unsupported hdr type %d, version %d\n",
820 		      hdr->type, hdr->version))
821 		return false;
822 
823 	if (WARN_ONCE(le16_to_cpu(hdr->size) != expected_size,
824 		      "received invalid statistics size in header (%d)!, expected_size: %d\n",
825 		      le16_to_cpu(hdr->size), expected_size))
826 		return false;
827 
828 	return true;
829 }
830 
831 static void
iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)832 iwl_mvm_handle_rx_statistics_tlv(struct iwl_mvm *mvm,
833 				 struct iwl_rx_packet *pkt)
834 {
835 	u8 average_energy[IWL_MVM_STATION_COUNT_MAX];
836 	__le32 air_time[MAC_INDEX_AUX];
837 	__le32 rx_bytes[MAC_INDEX_AUX];
838 	__le32 flags = 0;
839 	int i;
840 	u32 notif_ver = iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
841 					      STATISTICS_NOTIFICATION, 0);
842 
843 	if (WARN_ONCE(notif_ver > 15,
844 		      "invalid statistics version id: %d\n", notif_ver))
845 		return;
846 
847 	if (notif_ver == 14) {
848 		struct iwl_statistics_operational_ntfy_ver_14 *stats =
849 			(void *)pkt->data;
850 
851 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
852 			return;
853 
854 		iwl_mvm_stats_ver_14(mvm, stats);
855 
856 		flags = stats->flags;
857 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
858 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
859 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
860 		mvm->radio_stats.on_time_scan =
861 			le64_to_cpu(stats->on_time_scan);
862 
863 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
864 			average_energy[i] = le32_to_cpu(stats->average_energy[i]);
865 
866 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
867 			air_time[i] = stats->air_time[i];
868 			rx_bytes[i] = stats->rx_bytes[i];
869 		}
870 	}
871 
872 	if (notif_ver == 15) {
873 		struct iwl_statistics_operational_ntfy *stats =
874 			(void *)pkt->data;
875 
876 		if (!iwl_mvm_verify_stats_len(mvm, pkt, sizeof(*stats)))
877 			return;
878 
879 		iwl_mvm_stats_ver_15(mvm, stats);
880 
881 		flags = stats->flags;
882 		mvm->radio_stats.rx_time = le64_to_cpu(stats->rx_time);
883 		mvm->radio_stats.tx_time = le64_to_cpu(stats->tx_time);
884 		mvm->radio_stats.on_time_rf = le64_to_cpu(stats->on_time_rf);
885 		mvm->radio_stats.on_time_scan =
886 			le64_to_cpu(stats->on_time_scan);
887 
888 		for (i = 0; i < ARRAY_SIZE(average_energy); i++)
889 			average_energy[i] =
890 				le32_to_cpu(stats->per_sta_stats[i].average_energy);
891 
892 		for (i = 0; i < ARRAY_SIZE(air_time); i++) {
893 			air_time[i] = stats->per_mac_stats[i].air_time;
894 			rx_bytes[i] = stats->per_mac_stats[i].rx_bytes;
895 		}
896 	}
897 
898 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
899 
900 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
901 					  average_energy);
902 	/*
903 	 * Don't update in case the statistics are not cleared, since
904 	 * we will end up counting twice the same airtime, once in TCM
905 	 * request and once in statistics notification.
906 	 */
907 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
908 		iwl_mvm_update_tcm_from_stats(mvm, air_time, rx_bytes);
909 }
910 
iwl_mvm_handle_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)911 void iwl_mvm_handle_rx_statistics(struct iwl_mvm *mvm,
912 				  struct iwl_rx_packet *pkt)
913 {
914 	struct iwl_mvm_stat_data data = {
915 		.mvm = mvm,
916 	};
917 	__le32 *bytes, *air_time, flags;
918 	int expected_size;
919 	u8 *energy;
920 
921 	/* From ver 14 and up we use TLV statistics format */
922 	if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
923 				    STATISTICS_NOTIFICATION, 0) >= 14)
924 		return iwl_mvm_handle_rx_statistics_tlv(mvm, pkt);
925 
926 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
927 		if (iwl_mvm_has_new_rx_api(mvm))
928 			expected_size = sizeof(struct iwl_notif_statistics_v11);
929 		else
930 			expected_size = sizeof(struct iwl_notif_statistics_v10);
931 	} else {
932 		expected_size = sizeof(struct iwl_notif_statistics);
933 	}
934 
935 	if (WARN_ONCE(iwl_rx_packet_payload_len(pkt) != expected_size,
936 		      "received invalid statistics size (%d)!\n",
937 		      iwl_rx_packet_payload_len(pkt)))
938 		return;
939 
940 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
941 		struct iwl_notif_statistics_v11 *stats = (void *)&pkt->data;
942 
943 		data.mac_id = stats->rx.general.mac_id;
944 		data.beacon_filter_average_energy =
945 			stats->general.common.beacon_filter_average_energy;
946 
947 		mvm->rx_stats_v3 = stats->rx;
948 
949 		mvm->radio_stats.rx_time =
950 			le64_to_cpu(stats->general.common.rx_time);
951 		mvm->radio_stats.tx_time =
952 			le64_to_cpu(stats->general.common.tx_time);
953 		mvm->radio_stats.on_time_rf =
954 			le64_to_cpu(stats->general.common.on_time_rf);
955 		mvm->radio_stats.on_time_scan =
956 			le64_to_cpu(stats->general.common.on_time_scan);
957 
958 		data.beacon_counter = stats->general.beacon_counter;
959 		data.beacon_average_energy =
960 			stats->general.beacon_average_energy;
961 		flags = stats->flag;
962 	} else {
963 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
964 
965 		data.mac_id = stats->rx.general.mac_id;
966 		data.beacon_filter_average_energy =
967 			stats->general.common.beacon_filter_average_energy;
968 
969 		mvm->rx_stats = stats->rx;
970 
971 		mvm->radio_stats.rx_time =
972 			le64_to_cpu(stats->general.common.rx_time);
973 		mvm->radio_stats.tx_time =
974 			le64_to_cpu(stats->general.common.tx_time);
975 		mvm->radio_stats.on_time_rf =
976 			le64_to_cpu(stats->general.common.on_time_rf);
977 		mvm->radio_stats.on_time_scan =
978 			le64_to_cpu(stats->general.common.on_time_scan);
979 
980 		data.beacon_counter = stats->general.beacon_counter;
981 		data.beacon_average_energy =
982 			stats->general.beacon_average_energy;
983 		flags = stats->flag;
984 	}
985 	data.flags = flags;
986 
987 	iwl_mvm_rx_stats_check_trigger(mvm, pkt);
988 
989 	ieee80211_iterate_active_interfaces(mvm->hw,
990 					    IEEE80211_IFACE_ITER_NORMAL,
991 					    iwl_mvm_stat_iterator,
992 					    &data);
993 
994 	if (!iwl_mvm_has_new_rx_api(mvm))
995 		return;
996 
997 	if (!iwl_mvm_has_new_rx_stats_api(mvm)) {
998 		struct iwl_notif_statistics_v11 *v11 = (void *)&pkt->data;
999 
1000 		energy = (void *)&v11->load_stats.avg_energy;
1001 		bytes = (void *)&v11->load_stats.byte_count;
1002 		air_time = (void *)&v11->load_stats.air_time;
1003 	} else {
1004 		struct iwl_notif_statistics *stats = (void *)&pkt->data;
1005 
1006 		energy = (void *)&stats->load_stats.avg_energy;
1007 		bytes = (void *)&stats->load_stats.byte_count;
1008 		air_time = (void *)&stats->load_stats.air_time;
1009 	}
1010 	ieee80211_iterate_stations_atomic(mvm->hw, iwl_mvm_stats_energy_iter,
1011 					  energy);
1012 
1013 	/*
1014 	 * Don't update in case the statistics are not cleared, since
1015 	 * we will end up counting twice the same airtime, once in TCM
1016 	 * request and once in statistics notification.
1017 	 */
1018 	if (le32_to_cpu(flags) & IWL_STATISTICS_REPLY_FLG_CLEAR)
1019 		iwl_mvm_update_tcm_from_stats(mvm, air_time, bytes);
1020 
1021 }
1022 
iwl_mvm_rx_statistics(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1023 void iwl_mvm_rx_statistics(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1024 {
1025 	iwl_mvm_handle_rx_statistics(mvm, rxb_addr(rxb));
1026 }
1027 
iwl_mvm_window_status_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1028 void iwl_mvm_window_status_notif(struct iwl_mvm *mvm,
1029 				 struct iwl_rx_cmd_buffer *rxb)
1030 {
1031 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1032 	struct iwl_ba_window_status_notif *notif = (void *)pkt->data;
1033 	int i;
1034 
1035 	BUILD_BUG_ON(ARRAY_SIZE(notif->ra_tid) != BA_WINDOW_STREAMS_MAX);
1036 	BUILD_BUG_ON(ARRAY_SIZE(notif->mpdu_rx_count) != BA_WINDOW_STREAMS_MAX);
1037 	BUILD_BUG_ON(ARRAY_SIZE(notif->bitmap) != BA_WINDOW_STREAMS_MAX);
1038 	BUILD_BUG_ON(ARRAY_SIZE(notif->start_seq_num) != BA_WINDOW_STREAMS_MAX);
1039 
1040 	rcu_read_lock();
1041 	for (i = 0; i < BA_WINDOW_STREAMS_MAX; i++) {
1042 		struct ieee80211_sta *sta;
1043 		u8 sta_id, tid;
1044 		u64 bitmap;
1045 		u32 ssn;
1046 		u16 ratid;
1047 		u16 received_mpdu;
1048 
1049 		ratid = le16_to_cpu(notif->ra_tid[i]);
1050 		/* check that this TID is valid */
1051 		if (!(ratid & BA_WINDOW_STATUS_VALID_MSK))
1052 			continue;
1053 
1054 		received_mpdu = le16_to_cpu(notif->mpdu_rx_count[i]);
1055 		if (received_mpdu == 0)
1056 			continue;
1057 
1058 		tid = ratid & BA_WINDOW_STATUS_TID_MSK;
1059 		/* get the station */
1060 		sta_id = (ratid & BA_WINDOW_STATUS_STA_ID_MSK)
1061 			 >> BA_WINDOW_STATUS_STA_ID_POS;
1062 		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1063 		if (IS_ERR_OR_NULL(sta))
1064 			continue;
1065 		bitmap = le64_to_cpu(notif->bitmap[i]);
1066 		ssn = le32_to_cpu(notif->start_seq_num[i]);
1067 
1068 		/* update mac80211 with the bitmap for the reordering buffer */
1069 		ieee80211_mark_rx_ba_filtered_frames(sta, tid, ssn, bitmap,
1070 						     received_mpdu);
1071 	}
1072 	rcu_read_unlock();
1073 }
1074