1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
4  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5  * Copyright (C) 2015-2017 Intel Deutschland GmbH
6  */
7 #include <net/mac80211.h>
8 
9 #include "iwl-debug.h"
10 #include "iwl-io.h"
11 #include "iwl-prph.h"
12 #include "iwl-csr.h"
13 #include "mvm.h"
14 #include "fw/api/rs.h"
15 #include "fw/img.h"
16 
17 /*
18  * Will return 0 even if the cmd failed when RFKILL is asserted unless
19  * CMD_WANT_SKB is set in cmd->flags.
20  */
21 int iwl_mvm_send_cmd(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd)
22 {
23 	int ret;
24 
25 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
26 	if (WARN_ON(mvm->d3_test_active))
27 		return -EIO;
28 #endif
29 
30 	/*
31 	 * Synchronous commands from this op-mode must hold
32 	 * the mutex, this ensures we don't try to send two
33 	 * (or more) synchronous commands at a time.
34 	 */
35 	if (!(cmd->flags & CMD_ASYNC))
36 		lockdep_assert_held(&mvm->mutex);
37 
38 	ret = iwl_trans_send_cmd(mvm->trans, cmd);
39 
40 	/*
41 	 * If the caller wants the SKB, then don't hide any problems, the
42 	 * caller might access the response buffer which will be NULL if
43 	 * the command failed.
44 	 */
45 	if (cmd->flags & CMD_WANT_SKB)
46 		return ret;
47 
48 	/*
49 	 * Silently ignore failures if RFKILL is asserted or
50 	 * we are in suspend\resume process
51 	 */
52 	if (!ret || ret == -ERFKILL || ret == -EHOSTDOWN)
53 		return 0;
54 	return ret;
55 }
56 
57 int iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u32 id,
58 			 u32 flags, u16 len, const void *data)
59 {
60 	struct iwl_host_cmd cmd = {
61 		.id = id,
62 		.len = { len, },
63 		.data = { data, },
64 		.flags = flags,
65 	};
66 
67 	return iwl_mvm_send_cmd(mvm, &cmd);
68 }
69 
70 /*
71  * We assume that the caller set the status to the success value
72  */
73 int iwl_mvm_send_cmd_status(struct iwl_mvm *mvm, struct iwl_host_cmd *cmd,
74 			    u32 *status)
75 {
76 	struct iwl_rx_packet *pkt;
77 	struct iwl_cmd_response *resp;
78 	int ret, resp_len;
79 
80 	lockdep_assert_held(&mvm->mutex);
81 
82 #if defined(CONFIG_IWLWIFI_DEBUGFS) && defined(CONFIG_PM_SLEEP)
83 	if (WARN_ON(mvm->d3_test_active))
84 		return -EIO;
85 #endif
86 
87 	/*
88 	 * Only synchronous commands can wait for status,
89 	 * we use WANT_SKB so the caller can't.
90 	 */
91 	if (WARN_ONCE(cmd->flags & (CMD_ASYNC | CMD_WANT_SKB),
92 		      "cmd flags %x", cmd->flags))
93 		return -EINVAL;
94 
95 	cmd->flags |= CMD_WANT_SKB;
96 
97 	ret = iwl_trans_send_cmd(mvm->trans, cmd);
98 	if (ret == -ERFKILL) {
99 		/*
100 		 * The command failed because of RFKILL, don't update
101 		 * the status, leave it as success and return 0.
102 		 */
103 		return 0;
104 	} else if (ret) {
105 		return ret;
106 	}
107 
108 	pkt = cmd->resp_pkt;
109 
110 	resp_len = iwl_rx_packet_payload_len(pkt);
111 	if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
112 		ret = -EIO;
113 		goto out_free_resp;
114 	}
115 
116 	resp = (void *)pkt->data;
117 	*status = le32_to_cpu(resp->status);
118  out_free_resp:
119 	iwl_free_resp(cmd);
120 	return ret;
121 }
122 
123 /*
124  * We assume that the caller set the status to the sucess value
125  */
126 int iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u32 id, u16 len,
127 				const void *data, u32 *status)
128 {
129 	struct iwl_host_cmd cmd = {
130 		.id = id,
131 		.len = { len, },
132 		.data = { data, },
133 	};
134 
135 	return iwl_mvm_send_cmd_status(mvm, &cmd, status);
136 }
137 
138 int iwl_mvm_legacy_hw_idx_to_mac80211_idx(u32 rate_n_flags,
139 					  enum nl80211_band band)
140 {
141 	int format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
142 	int rate = rate_n_flags & RATE_LEGACY_RATE_MSK;
143 	bool is_LB = band == NL80211_BAND_2GHZ;
144 
145 	if (format == RATE_MCS_LEGACY_OFDM_MSK)
146 		return is_LB ? rate + IWL_FIRST_OFDM_RATE :
147 			rate;
148 
149 	/* CCK is not allowed in HB */
150 	return is_LB ? rate : -1;
151 }
152 
153 int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
154 					enum nl80211_band band)
155 {
156 	int rate = rate_n_flags & RATE_LEGACY_RATE_MSK_V1;
157 	int idx;
158 	int band_offset = 0;
159 
160 	/* Legacy rate format, search for match in table */
161 	if (band != NL80211_BAND_2GHZ)
162 		band_offset = IWL_FIRST_OFDM_RATE;
163 	for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
164 		if (iwl_fw_rate_idx_to_plcp(idx) == rate)
165 			return idx - band_offset;
166 
167 	return -1;
168 }
169 
170 u8 iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw *fw, int rate_idx)
171 {
172 	if (iwl_fw_lookup_cmd_ver(fw, TX_CMD, 0) > 8)
173 		/* In the new rate legacy rates are indexed:
174 		 * 0 - 3 for CCK and 0 - 7 for OFDM.
175 		 */
176 		return (rate_idx >= IWL_FIRST_OFDM_RATE ?
177 			rate_idx - IWL_FIRST_OFDM_RATE :
178 			rate_idx);
179 
180 	return iwl_fw_rate_idx_to_plcp(rate_idx);
181 }
182 
183 u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac)
184 {
185 	static const u8 mac80211_ac_to_ucode_ac[] = {
186 		AC_VO,
187 		AC_VI,
188 		AC_BE,
189 		AC_BK
190 	};
191 
192 	return mac80211_ac_to_ucode_ac[ac];
193 }
194 
195 void iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
196 {
197 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
198 	struct iwl_error_resp *err_resp = (void *)pkt->data;
199 
200 	IWL_ERR(mvm, "FW Error notification: type 0x%08X cmd_id 0x%02X\n",
201 		le32_to_cpu(err_resp->error_type), err_resp->cmd_id);
202 	IWL_ERR(mvm, "FW Error notification: seq 0x%04X service 0x%08X\n",
203 		le16_to_cpu(err_resp->bad_cmd_seq_num),
204 		le32_to_cpu(err_resp->error_service));
205 	IWL_ERR(mvm, "FW Error notification: timestamp 0x%016llX\n",
206 		le64_to_cpu(err_resp->timestamp));
207 }
208 
209 /*
210  * Returns the first antenna as ANT_[ABC], as defined in iwl-config.h.
211  * The parameter should also be a combination of ANT_[ABC].
212  */
213 u8 first_antenna(u8 mask)
214 {
215 	BUILD_BUG_ON(ANT_A != BIT(0)); /* using ffs is wrong if not */
216 	if (WARN_ON_ONCE(!mask)) /* ffs will return 0 if mask is zeroed */
217 		return BIT(0);
218 	return BIT(ffs(mask) - 1);
219 }
220 
221 #define MAX_ANT_NUM 2
222 /*
223  * Toggles between TX antennas to send the probe request on.
224  * Receives the bitmask of valid TX antennas and the *index* used
225  * for the last TX, and returns the next valid *index* to use.
226  * In order to set it in the tx_cmd, must do BIT(idx).
227  */
228 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx)
229 {
230 	u8 ind = last_idx;
231 	int i;
232 
233 	for (i = 0; i < MAX_ANT_NUM; i++) {
234 		ind = (ind + 1) % MAX_ANT_NUM;
235 		if (valid & BIT(ind))
236 			return ind;
237 	}
238 
239 	WARN_ONCE(1, "Failed to toggle between antennas 0x%x", valid);
240 	return last_idx;
241 }
242 
243 /**
244  * iwl_mvm_send_lq_cmd() - Send link quality command
245  * @mvm: Driver data.
246  * @lq: Link quality command to send.
247  *
248  * The link quality command is sent as the last step of station creation.
249  * This is the special case in which init is set and we call a callback in
250  * this case to clear the state indicating that station creation is in
251  * progress.
252  */
253 int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq)
254 {
255 	struct iwl_host_cmd cmd = {
256 		.id = LQ_CMD,
257 		.len = { sizeof(struct iwl_lq_cmd), },
258 		.flags = CMD_ASYNC,
259 		.data = { lq, },
260 	};
261 
262 	if (WARN_ON(lq->sta_id == IWL_MVM_INVALID_STA ||
263 		    iwl_mvm_has_tlc_offload(mvm)))
264 		return -EINVAL;
265 
266 	return iwl_mvm_send_cmd(mvm, &cmd);
267 }
268 
269 /**
270  * iwl_mvm_update_smps - Get a request to change the SMPS mode
271  * @mvm: Driver data.
272  * @vif: Pointer to the ieee80211_vif structure
273  * @req_type: The part of the driver who call for a change.
274  * @smps_request: The request to change the SMPS mode.
275  * @link_id: for MLO link_id, otherwise 0 (deflink)
276  *
277  * Get a requst to change the SMPS mode,
278  * and change it according to all other requests in the driver.
279  */
280 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
281 			 enum iwl_mvm_smps_type_request req_type,
282 			 enum ieee80211_smps_mode smps_request,
283 			 unsigned int link_id)
284 {
285 	struct iwl_mvm_vif *mvmvif;
286 	enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
287 	int i;
288 
289 	lockdep_assert_held(&mvm->mutex);
290 
291 	/* SMPS is irrelevant for NICs that don't have at least 2 RX antenna */
292 	if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
293 		return;
294 
295 	if (vif->type != NL80211_IFTYPE_STATION)
296 		return;
297 
298 	mvmvif = iwl_mvm_vif_from_mac80211(vif);
299 
300 	if (WARN_ON_ONCE(!mvmvif->link[link_id]))
301 		return;
302 
303 	mvmvif->link[link_id]->smps_requests[req_type] = smps_request;
304 	for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
305 		if (mvmvif->link[link_id]->smps_requests[i] ==
306 		    IEEE80211_SMPS_STATIC) {
307 			smps_mode = IEEE80211_SMPS_STATIC;
308 			break;
309 		}
310 		if (mvmvif->link[link_id]->smps_requests[i] ==
311 		    IEEE80211_SMPS_DYNAMIC)
312 			smps_mode = IEEE80211_SMPS_DYNAMIC;
313 	}
314 
315 	/* SMPS is disabled in eSR */
316 	if (mvmvif->esr_active)
317 		smps_mode = IEEE80211_SMPS_OFF;
318 
319 	ieee80211_request_smps(vif, link_id, smps_mode);
320 }
321 
322 void iwl_mvm_update_smps_on_active_links(struct iwl_mvm *mvm,
323 					 struct ieee80211_vif *vif,
324 					 enum iwl_mvm_smps_type_request req_type,
325 					 enum ieee80211_smps_mode smps_request)
326 {
327 	struct ieee80211_bss_conf *link_conf;
328 	unsigned int link_id;
329 
330 	rcu_read_lock();
331 	for_each_vif_active_link(vif, link_conf, link_id)
332 		iwl_mvm_update_smps(mvm, vif, req_type, smps_request,
333 				    link_id);
334 	rcu_read_unlock();
335 }
336 
337 static bool iwl_wait_stats_complete(struct iwl_notif_wait_data *notif_wait,
338 				    struct iwl_rx_packet *pkt, void *data)
339 {
340 	WARN_ON(pkt->hdr.cmd != STATISTICS_NOTIFICATION);
341 
342 	return true;
343 }
344 
345 int iwl_mvm_request_statistics(struct iwl_mvm *mvm, bool clear)
346 {
347 	struct iwl_statistics_cmd scmd = {
348 		.flags = clear ? cpu_to_le32(IWL_STATISTICS_FLG_CLEAR) : 0,
349 	};
350 
351 	struct iwl_host_cmd cmd = {
352 		.id = STATISTICS_CMD,
353 		.len[0] = sizeof(scmd),
354 		.data[0] = &scmd,
355 	};
356 	int ret;
357 
358 	/* From version 15 - STATISTICS_NOTIFICATION, the reply for
359 	 * STATISTICS_CMD is empty, and the response is with
360 	 * STATISTICS_NOTIFICATION notification
361 	 */
362 	if (iwl_fw_lookup_notif_ver(mvm->fw, LEGACY_GROUP,
363 				    STATISTICS_NOTIFICATION, 0) < 15) {
364 		cmd.flags = CMD_WANT_SKB;
365 
366 		ret = iwl_mvm_send_cmd(mvm, &cmd);
367 		if (ret)
368 			return ret;
369 
370 		iwl_mvm_handle_rx_statistics(mvm, cmd.resp_pkt);
371 		iwl_free_resp(&cmd);
372 	} else {
373 		struct iwl_notification_wait stats_wait;
374 		static const u16 stats_complete[] = {
375 			STATISTICS_NOTIFICATION,
376 		};
377 
378 		iwl_init_notification_wait(&mvm->notif_wait, &stats_wait,
379 					   stats_complete, ARRAY_SIZE(stats_complete),
380 					   iwl_wait_stats_complete, NULL);
381 
382 		ret = iwl_mvm_send_cmd(mvm, &cmd);
383 		if (ret) {
384 			iwl_remove_notification(&mvm->notif_wait, &stats_wait);
385 			return ret;
386 		}
387 
388 		/* 200ms should be enough for FW to collect data from all
389 		 * LMACs and send STATISTICS_NOTIFICATION to host
390 		 */
391 		ret = iwl_wait_notification(&mvm->notif_wait, &stats_wait, HZ / 5);
392 		if (ret)
393 			return ret;
394 	}
395 
396 	if (clear)
397 		iwl_mvm_accu_radio_stats(mvm);
398 
399 	return 0;
400 }
401 
402 void iwl_mvm_accu_radio_stats(struct iwl_mvm *mvm)
403 {
404 	mvm->accu_radio_stats.rx_time += mvm->radio_stats.rx_time;
405 	mvm->accu_radio_stats.tx_time += mvm->radio_stats.tx_time;
406 	mvm->accu_radio_stats.on_time_rf += mvm->radio_stats.on_time_rf;
407 	mvm->accu_radio_stats.on_time_scan += mvm->radio_stats.on_time_scan;
408 }
409 
410 struct iwl_mvm_diversity_iter_data {
411 	struct iwl_mvm_phy_ctxt *ctxt;
412 	bool result;
413 };
414 
415 static void iwl_mvm_diversity_iter(void *_data, u8 *mac,
416 				   struct ieee80211_vif *vif)
417 {
418 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
419 	struct iwl_mvm_diversity_iter_data *data = _data;
420 	int i, link_id;
421 
422 	for_each_mvm_vif_valid_link(mvmvif, link_id) {
423 		struct iwl_mvm_vif_link_info *link_info = mvmvif->link[link_id];
424 
425 		if (link_info->phy_ctxt != data->ctxt)
426 			continue;
427 
428 		for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) {
429 			if (link_info->smps_requests[i] == IEEE80211_SMPS_STATIC ||
430 			    link_info->smps_requests[i] == IEEE80211_SMPS_DYNAMIC) {
431 				data->result = false;
432 				break;
433 			}
434 		}
435 	}
436 }
437 
438 bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm,
439 				  struct iwl_mvm_phy_ctxt *ctxt)
440 {
441 	struct iwl_mvm_diversity_iter_data data = {
442 		.ctxt = ctxt,
443 		.result = true,
444 	};
445 
446 	lockdep_assert_held(&mvm->mutex);
447 
448 	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
449 		return false;
450 
451 	if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
452 		return false;
453 
454 	if (mvm->cfg->rx_with_siso_diversity)
455 		return false;
456 
457 	ieee80211_iterate_active_interfaces_atomic(
458 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
459 			iwl_mvm_diversity_iter, &data);
460 
461 	return data.result;
462 }
463 
464 void iwl_mvm_send_low_latency_cmd(struct iwl_mvm *mvm,
465 				  bool low_latency, u16 mac_id)
466 {
467 	struct iwl_mac_low_latency_cmd cmd = {
468 		.mac_id = cpu_to_le32(mac_id)
469 	};
470 
471 	if (!fw_has_capa(&mvm->fw->ucode_capa,
472 			 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
473 		return;
474 
475 	if (low_latency) {
476 		/* currently we don't care about the direction */
477 		cmd.low_latency_rx = 1;
478 		cmd.low_latency_tx = 1;
479 	}
480 
481 	if (iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, LOW_LATENCY_CMD),
482 				 0, sizeof(cmd), &cmd))
483 		IWL_ERR(mvm, "Failed to send low latency command\n");
484 }
485 
486 int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
487 			       bool low_latency,
488 			       enum iwl_mvm_low_latency_cause cause)
489 {
490 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
491 	int res;
492 	bool prev;
493 
494 	lockdep_assert_held(&mvm->mutex);
495 
496 	prev = iwl_mvm_vif_low_latency(mvmvif);
497 	iwl_mvm_vif_set_low_latency(mvmvif, low_latency, cause);
498 
499 	low_latency = iwl_mvm_vif_low_latency(mvmvif);
500 
501 	if (low_latency == prev)
502 		return 0;
503 
504 	iwl_mvm_send_low_latency_cmd(mvm, low_latency, mvmvif->id);
505 
506 	res = iwl_mvm_update_quotas(mvm, false, NULL);
507 	if (res)
508 		return res;
509 
510 	iwl_mvm_bt_coex_vif_change(mvm);
511 
512 	return iwl_mvm_power_update_mac(mvm);
513 }
514 
515 struct iwl_mvm_low_latency_iter {
516 	bool result;
517 	bool result_per_band[NUM_NL80211_BANDS];
518 };
519 
520 static void iwl_mvm_ll_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
521 {
522 	struct iwl_mvm_low_latency_iter *result = _data;
523 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
524 	enum nl80211_band band;
525 
526 	if (iwl_mvm_vif_low_latency(mvmvif)) {
527 		result->result = true;
528 
529 		if (!mvmvif->deflink.phy_ctxt)
530 			return;
531 
532 		band = mvmvif->deflink.phy_ctxt->channel->band;
533 		result->result_per_band[band] = true;
534 	}
535 }
536 
537 bool iwl_mvm_low_latency(struct iwl_mvm *mvm)
538 {
539 	struct iwl_mvm_low_latency_iter data = {};
540 
541 	ieee80211_iterate_active_interfaces_atomic(
542 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
543 			iwl_mvm_ll_iter, &data);
544 
545 	return data.result;
546 }
547 
548 bool iwl_mvm_low_latency_band(struct iwl_mvm *mvm, enum nl80211_band band)
549 {
550 	struct iwl_mvm_low_latency_iter data = {};
551 
552 	ieee80211_iterate_active_interfaces_atomic(
553 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
554 			iwl_mvm_ll_iter, &data);
555 
556 	return data.result_per_band[band];
557 }
558 
559 struct iwl_bss_iter_data {
560 	struct ieee80211_vif *vif;
561 	bool error;
562 };
563 
564 static void iwl_mvm_bss_iface_iterator(void *_data, u8 *mac,
565 				       struct ieee80211_vif *vif)
566 {
567 	struct iwl_bss_iter_data *data = _data;
568 
569 	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
570 		return;
571 
572 	if (data->vif) {
573 		data->error = true;
574 		return;
575 	}
576 
577 	data->vif = vif;
578 }
579 
580 struct ieee80211_vif *iwl_mvm_get_bss_vif(struct iwl_mvm *mvm)
581 {
582 	struct iwl_bss_iter_data bss_iter_data = {};
583 
584 	ieee80211_iterate_active_interfaces_atomic(
585 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
586 		iwl_mvm_bss_iface_iterator, &bss_iter_data);
587 
588 	if (bss_iter_data.error) {
589 		IWL_ERR(mvm, "More than one managed interface active!\n");
590 		return ERR_PTR(-EINVAL);
591 	}
592 
593 	return bss_iter_data.vif;
594 }
595 
596 struct iwl_bss_find_iter_data {
597 	struct ieee80211_vif *vif;
598 	u32 macid;
599 };
600 
601 static void iwl_mvm_bss_find_iface_iterator(void *_data, u8 *mac,
602 					    struct ieee80211_vif *vif)
603 {
604 	struct iwl_bss_find_iter_data *data = _data;
605 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
606 
607 	if (mvmvif->id == data->macid)
608 		data->vif = vif;
609 }
610 
611 struct ieee80211_vif *iwl_mvm_get_vif_by_macid(struct iwl_mvm *mvm, u32 macid)
612 {
613 	struct iwl_bss_find_iter_data data = {
614 		.macid = macid,
615 	};
616 
617 	lockdep_assert_held(&mvm->mutex);
618 
619 	ieee80211_iterate_active_interfaces_atomic(
620 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
621 		iwl_mvm_bss_find_iface_iterator, &data);
622 
623 	return data.vif;
624 }
625 
626 struct iwl_sta_iter_data {
627 	bool assoc;
628 };
629 
630 static void iwl_mvm_sta_iface_iterator(void *_data, u8 *mac,
631 				       struct ieee80211_vif *vif)
632 {
633 	struct iwl_sta_iter_data *data = _data;
634 
635 	if (vif->type != NL80211_IFTYPE_STATION)
636 		return;
637 
638 	if (vif->cfg.assoc)
639 		data->assoc = true;
640 }
641 
642 bool iwl_mvm_is_vif_assoc(struct iwl_mvm *mvm)
643 {
644 	struct iwl_sta_iter_data data = {
645 		.assoc = false,
646 	};
647 
648 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
649 						   IEEE80211_IFACE_ITER_NORMAL,
650 						   iwl_mvm_sta_iface_iterator,
651 						   &data);
652 	return data.assoc;
653 }
654 
655 unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
656 				    struct ieee80211_vif *vif,
657 				    bool tdls, bool cmd_q)
658 {
659 	struct iwl_fw_dbg_trigger_tlv *trigger;
660 	struct iwl_fw_dbg_trigger_txq_timer *txq_timer;
661 	unsigned int default_timeout = cmd_q ?
662 		IWL_DEF_WD_TIMEOUT :
663 		mvm->trans->trans_cfg->base_params->wd_timeout;
664 
665 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS)) {
666 		/*
667 		 * We can't know when the station is asleep or awake, so we
668 		 * must disable the queue hang detection.
669 		 */
670 		if (fw_has_capa(&mvm->fw->ucode_capa,
671 				IWL_UCODE_TLV_CAPA_STA_PM_NOTIF) &&
672 		    vif && vif->type == NL80211_IFTYPE_AP)
673 			return IWL_WATCHDOG_DISABLED;
674 		return default_timeout;
675 	}
676 
677 	trigger = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TXQ_TIMERS);
678 	txq_timer = (void *)trigger->data;
679 
680 	if (tdls)
681 		return le32_to_cpu(txq_timer->tdls);
682 
683 	if (cmd_q)
684 		return le32_to_cpu(txq_timer->command_queue);
685 
686 	if (WARN_ON(!vif))
687 		return default_timeout;
688 
689 	switch (ieee80211_vif_type_p2p(vif)) {
690 	case NL80211_IFTYPE_ADHOC:
691 		return le32_to_cpu(txq_timer->ibss);
692 	case NL80211_IFTYPE_STATION:
693 		return le32_to_cpu(txq_timer->bss);
694 	case NL80211_IFTYPE_AP:
695 		return le32_to_cpu(txq_timer->softap);
696 	case NL80211_IFTYPE_P2P_CLIENT:
697 		return le32_to_cpu(txq_timer->p2p_client);
698 	case NL80211_IFTYPE_P2P_GO:
699 		return le32_to_cpu(txq_timer->p2p_go);
700 	case NL80211_IFTYPE_P2P_DEVICE:
701 		return le32_to_cpu(txq_timer->p2p_device);
702 	case NL80211_IFTYPE_MONITOR:
703 		return default_timeout;
704 	default:
705 		WARN_ON(1);
706 		return mvm->trans->trans_cfg->base_params->wd_timeout;
707 	}
708 }
709 
710 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
711 			     const char *errmsg)
712 {
713 	struct iwl_fw_dbg_trigger_tlv *trig;
714 	struct iwl_fw_dbg_trigger_mlme *trig_mlme;
715 
716 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
717 				     FW_DBG_TRIGGER_MLME);
718 	if (!trig)
719 		goto out;
720 
721 	trig_mlme = (void *)trig->data;
722 
723 	if (trig_mlme->stop_connection_loss &&
724 	    --trig_mlme->stop_connection_loss)
725 		goto out;
726 
727 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "%s", errmsg);
728 
729 out:
730 	ieee80211_connection_loss(vif);
731 }
732 
733 void iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
734 					  struct ieee80211_vif *vif,
735 					  const struct ieee80211_sta *sta,
736 					  u16 tid)
737 {
738 	struct iwl_fw_dbg_trigger_tlv *trig;
739 	struct iwl_fw_dbg_trigger_ba *ba_trig;
740 
741 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
742 				     FW_DBG_TRIGGER_BA);
743 	if (!trig)
744 		return;
745 
746 	ba_trig = (void *)trig->data;
747 
748 	if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(tid)))
749 		return;
750 
751 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
752 				"Frame from %pM timed out, tid %d",
753 				sta->addr, tid);
754 }
755 
756 u8 iwl_mvm_tcm_load_percentage(u32 airtime, u32 elapsed)
757 {
758 	if (!elapsed)
759 		return 0;
760 
761 	return (100 * airtime / elapsed) / USEC_PER_MSEC;
762 }
763 
764 static enum iwl_mvm_traffic_load
765 iwl_mvm_tcm_load(struct iwl_mvm *mvm, u32 airtime, unsigned long elapsed)
766 {
767 	u8 load = iwl_mvm_tcm_load_percentage(airtime, elapsed);
768 
769 	if (load > IWL_MVM_TCM_LOAD_HIGH_THRESH)
770 		return IWL_MVM_TRAFFIC_HIGH;
771 	if (load > IWL_MVM_TCM_LOAD_MEDIUM_THRESH)
772 		return IWL_MVM_TRAFFIC_MEDIUM;
773 
774 	return IWL_MVM_TRAFFIC_LOW;
775 }
776 
777 static void iwl_mvm_tcm_iter(void *_data, u8 *mac, struct ieee80211_vif *vif)
778 {
779 	struct iwl_mvm *mvm = _data;
780 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
781 	bool low_latency, prev = mvmvif->low_latency & LOW_LATENCY_TRAFFIC;
782 
783 	if (mvmvif->id >= NUM_MAC_INDEX_DRIVER)
784 		return;
785 
786 	low_latency = mvm->tcm.result.low_latency[mvmvif->id];
787 
788 	if (!mvm->tcm.result.change[mvmvif->id] &&
789 	    prev == low_latency) {
790 		iwl_mvm_update_quotas(mvm, false, NULL);
791 		return;
792 	}
793 
794 	if (prev != low_latency) {
795 		/* this sends traffic load and updates quota as well */
796 		iwl_mvm_update_low_latency(mvm, vif, low_latency,
797 					   LOW_LATENCY_TRAFFIC);
798 	} else {
799 		iwl_mvm_update_quotas(mvm, false, NULL);
800 	}
801 }
802 
803 static void iwl_mvm_tcm_results(struct iwl_mvm *mvm)
804 {
805 	mutex_lock(&mvm->mutex);
806 
807 	ieee80211_iterate_active_interfaces(
808 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
809 		iwl_mvm_tcm_iter, mvm);
810 
811 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
812 		iwl_mvm_config_scan(mvm);
813 
814 	mutex_unlock(&mvm->mutex);
815 }
816 
817 static void iwl_mvm_tcm_uapsd_nonagg_detected_wk(struct work_struct *wk)
818 {
819 	struct iwl_mvm *mvm;
820 	struct iwl_mvm_vif *mvmvif;
821 	struct ieee80211_vif *vif;
822 
823 	mvmvif = container_of(wk, struct iwl_mvm_vif,
824 			      uapsd_nonagg_detected_wk.work);
825 	vif = container_of((void *)mvmvif, struct ieee80211_vif, drv_priv);
826 	mvm = mvmvif->mvm;
827 
828 	if (mvm->tcm.data[mvmvif->id].opened_rx_ba_sessions)
829 		return;
830 
831 	/* remember that this AP is broken */
832 	memcpy(mvm->uapsd_noagg_bssids[mvm->uapsd_noagg_bssid_write_idx].addr,
833 	       vif->bss_conf.bssid, ETH_ALEN);
834 	mvm->uapsd_noagg_bssid_write_idx++;
835 	if (mvm->uapsd_noagg_bssid_write_idx >= IWL_MVM_UAPSD_NOAGG_LIST_LEN)
836 		mvm->uapsd_noagg_bssid_write_idx = 0;
837 
838 	iwl_mvm_connection_loss(mvm, vif,
839 				"AP isn't using AMPDU with uAPSD enabled");
840 }
841 
842 static void iwl_mvm_uapsd_agg_disconnect(struct iwl_mvm *mvm,
843 					 struct ieee80211_vif *vif)
844 {
845 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
846 
847 	if (vif->type != NL80211_IFTYPE_STATION)
848 		return;
849 
850 	if (!vif->cfg.assoc)
851 		return;
852 
853 	if (!mvmvif->deflink.queue_params[IEEE80211_AC_VO].uapsd &&
854 	    !mvmvif->deflink.queue_params[IEEE80211_AC_VI].uapsd &&
855 	    !mvmvif->deflink.queue_params[IEEE80211_AC_BE].uapsd &&
856 	    !mvmvif->deflink.queue_params[IEEE80211_AC_BK].uapsd)
857 		return;
858 
859 	if (mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected)
860 		return;
861 
862 	mvm->tcm.data[mvmvif->id].uapsd_nonagg_detect.detected = true;
863 	IWL_INFO(mvm,
864 		 "detected AP should do aggregation but isn't, likely due to U-APSD\n");
865 	schedule_delayed_work(&mvmvif->uapsd_nonagg_detected_wk,
866 			      15 * HZ);
867 }
868 
869 static void iwl_mvm_check_uapsd_agg_expected_tpt(struct iwl_mvm *mvm,
870 						 unsigned int elapsed,
871 						 int mac)
872 {
873 	u64 bytes = mvm->tcm.data[mac].uapsd_nonagg_detect.rx_bytes;
874 	u64 tpt;
875 	unsigned long rate;
876 	struct ieee80211_vif *vif;
877 
878 	rate = ewma_rate_read(&mvm->tcm.data[mac].uapsd_nonagg_detect.rate);
879 
880 	if (!rate || mvm->tcm.data[mac].opened_rx_ba_sessions ||
881 	    mvm->tcm.data[mac].uapsd_nonagg_detect.detected)
882 		return;
883 
884 	if (iwl_mvm_has_new_rx_api(mvm)) {
885 		tpt = 8 * bytes; /* kbps */
886 		do_div(tpt, elapsed);
887 		rate *= 1000; /* kbps */
888 		if (tpt < 22 * rate / 100)
889 			return;
890 	} else {
891 		/*
892 		 * the rate here is actually the threshold, in 100Kbps units,
893 		 * so do the needed conversion from bytes to 100Kbps:
894 		 * 100kb = bits / (100 * 1000),
895 		 * 100kbps = 100kb / (msecs / 1000) ==
896 		 *           (bits / (100 * 1000)) / (msecs / 1000) ==
897 		 *           bits / (100 * msecs)
898 		 */
899 		tpt = (8 * bytes);
900 		do_div(tpt, elapsed * 100);
901 		if (tpt < rate)
902 			return;
903 	}
904 
905 	rcu_read_lock();
906 	vif = rcu_dereference(mvm->vif_id_to_mac[mac]);
907 	if (vif)
908 		iwl_mvm_uapsd_agg_disconnect(mvm, vif);
909 	rcu_read_unlock();
910 }
911 
912 static void iwl_mvm_tcm_iterator(void *_data, u8 *mac,
913 				 struct ieee80211_vif *vif)
914 {
915 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
916 	u32 *band = _data;
917 
918 	if (!mvmvif->deflink.phy_ctxt)
919 		return;
920 
921 	band[mvmvif->id] = mvmvif->deflink.phy_ctxt->channel->band;
922 }
923 
924 static unsigned long iwl_mvm_calc_tcm_stats(struct iwl_mvm *mvm,
925 					    unsigned long ts,
926 					    bool handle_uapsd)
927 {
928 	unsigned int elapsed = jiffies_to_msecs(ts - mvm->tcm.ts);
929 	unsigned int uapsd_elapsed =
930 		jiffies_to_msecs(ts - mvm->tcm.uapsd_nonagg_ts);
931 	u32 total_airtime = 0;
932 	u32 band_airtime[NUM_NL80211_BANDS] = {0};
933 	u32 band[NUM_MAC_INDEX_DRIVER] = {0};
934 	int ac, mac, i;
935 	bool low_latency = false;
936 	enum iwl_mvm_traffic_load load, band_load;
937 	bool handle_ll = time_after(ts, mvm->tcm.ll_ts + MVM_LL_PERIOD);
938 
939 	if (handle_ll)
940 		mvm->tcm.ll_ts = ts;
941 	if (handle_uapsd)
942 		mvm->tcm.uapsd_nonagg_ts = ts;
943 
944 	mvm->tcm.result.elapsed = elapsed;
945 
946 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
947 						   IEEE80211_IFACE_ITER_NORMAL,
948 						   iwl_mvm_tcm_iterator,
949 						   &band);
950 
951 	for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
952 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
953 		u32 vo_vi_pkts = 0;
954 		u32 airtime = mdata->rx.airtime + mdata->tx.airtime;
955 
956 		total_airtime += airtime;
957 		band_airtime[band[mac]] += airtime;
958 
959 		load = iwl_mvm_tcm_load(mvm, airtime, elapsed);
960 		mvm->tcm.result.change[mac] = load != mvm->tcm.result.load[mac];
961 		mvm->tcm.result.load[mac] = load;
962 		mvm->tcm.result.airtime[mac] = airtime;
963 
964 		for (ac = IEEE80211_AC_VO; ac <= IEEE80211_AC_VI; ac++)
965 			vo_vi_pkts += mdata->rx.pkts[ac] +
966 				      mdata->tx.pkts[ac];
967 
968 		/* enable immediately with enough packets but defer disabling */
969 		if (vo_vi_pkts > IWL_MVM_TCM_LOWLAT_ENABLE_THRESH)
970 			mvm->tcm.result.low_latency[mac] = true;
971 		else if (handle_ll)
972 			mvm->tcm.result.low_latency[mac] = false;
973 
974 		if (handle_ll) {
975 			/* clear old data */
976 			memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
977 			memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
978 		}
979 		low_latency |= mvm->tcm.result.low_latency[mac];
980 
981 		if (!mvm->tcm.result.low_latency[mac] && handle_uapsd)
982 			iwl_mvm_check_uapsd_agg_expected_tpt(mvm, uapsd_elapsed,
983 							     mac);
984 		/* clear old data */
985 		if (handle_uapsd)
986 			mdata->uapsd_nonagg_detect.rx_bytes = 0;
987 		memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
988 		memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
989 	}
990 
991 	load = iwl_mvm_tcm_load(mvm, total_airtime, elapsed);
992 	mvm->tcm.result.global_load = load;
993 
994 	for (i = 0; i < NUM_NL80211_BANDS; i++) {
995 		band_load = iwl_mvm_tcm_load(mvm, band_airtime[i], elapsed);
996 		mvm->tcm.result.band_load[i] = band_load;
997 	}
998 
999 	/*
1000 	 * If the current load isn't low we need to force re-evaluation
1001 	 * in the TCM period, so that we can return to low load if there
1002 	 * was no traffic at all (and thus iwl_mvm_recalc_tcm didn't get
1003 	 * triggered by traffic).
1004 	 */
1005 	if (load != IWL_MVM_TRAFFIC_LOW)
1006 		return MVM_TCM_PERIOD;
1007 	/*
1008 	 * If low-latency is active we need to force re-evaluation after
1009 	 * (the longer) MVM_LL_PERIOD, so that we can disable low-latency
1010 	 * when there's no traffic at all.
1011 	 */
1012 	if (low_latency)
1013 		return MVM_LL_PERIOD;
1014 	/*
1015 	 * Otherwise, we don't need to run the work struct because we're
1016 	 * in the default "idle" state - traffic indication is low (which
1017 	 * also covers the "no traffic" case) and low-latency is disabled
1018 	 * so there's no state that may need to be disabled when there's
1019 	 * no traffic at all.
1020 	 *
1021 	 * Note that this has no impact on the regular scheduling of the
1022 	 * updates triggered by traffic - those happen whenever one of the
1023 	 * two timeouts expire (if there's traffic at all.)
1024 	 */
1025 	return 0;
1026 }
1027 
1028 void iwl_mvm_recalc_tcm(struct iwl_mvm *mvm)
1029 {
1030 	unsigned long ts = jiffies;
1031 	bool handle_uapsd =
1032 		time_after(ts, mvm->tcm.uapsd_nonagg_ts +
1033 			       msecs_to_jiffies(IWL_MVM_UAPSD_NONAGG_PERIOD));
1034 
1035 	spin_lock(&mvm->tcm.lock);
1036 	if (mvm->tcm.paused || !time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1037 		spin_unlock(&mvm->tcm.lock);
1038 		return;
1039 	}
1040 	spin_unlock(&mvm->tcm.lock);
1041 
1042 	if (handle_uapsd && iwl_mvm_has_new_rx_api(mvm)) {
1043 		mutex_lock(&mvm->mutex);
1044 		if (iwl_mvm_request_statistics(mvm, true))
1045 			handle_uapsd = false;
1046 		mutex_unlock(&mvm->mutex);
1047 	}
1048 
1049 	spin_lock(&mvm->tcm.lock);
1050 	/* re-check if somebody else won the recheck race */
1051 	if (!mvm->tcm.paused && time_after(ts, mvm->tcm.ts + MVM_TCM_PERIOD)) {
1052 		/* calculate statistics */
1053 		unsigned long work_delay = iwl_mvm_calc_tcm_stats(mvm, ts,
1054 								  handle_uapsd);
1055 
1056 		/* the memset needs to be visible before the timestamp */
1057 		smp_mb();
1058 		mvm->tcm.ts = ts;
1059 		if (work_delay)
1060 			schedule_delayed_work(&mvm->tcm.work, work_delay);
1061 	}
1062 	spin_unlock(&mvm->tcm.lock);
1063 
1064 	iwl_mvm_tcm_results(mvm);
1065 }
1066 
1067 void iwl_mvm_tcm_work(struct work_struct *work)
1068 {
1069 	struct delayed_work *delayed_work = to_delayed_work(work);
1070 	struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1071 					   tcm.work);
1072 
1073 	iwl_mvm_recalc_tcm(mvm);
1074 }
1075 
1076 void iwl_mvm_pause_tcm(struct iwl_mvm *mvm, bool with_cancel)
1077 {
1078 	spin_lock_bh(&mvm->tcm.lock);
1079 	mvm->tcm.paused = true;
1080 	spin_unlock_bh(&mvm->tcm.lock);
1081 	if (with_cancel)
1082 		cancel_delayed_work_sync(&mvm->tcm.work);
1083 }
1084 
1085 void iwl_mvm_resume_tcm(struct iwl_mvm *mvm)
1086 {
1087 	int mac;
1088 	bool low_latency = false;
1089 
1090 	spin_lock_bh(&mvm->tcm.lock);
1091 	mvm->tcm.ts = jiffies;
1092 	mvm->tcm.ll_ts = jiffies;
1093 	for (mac = 0; mac < NUM_MAC_INDEX_DRIVER; mac++) {
1094 		struct iwl_mvm_tcm_mac *mdata = &mvm->tcm.data[mac];
1095 
1096 		memset(&mdata->rx.pkts, 0, sizeof(mdata->rx.pkts));
1097 		memset(&mdata->tx.pkts, 0, sizeof(mdata->tx.pkts));
1098 		memset(&mdata->rx.airtime, 0, sizeof(mdata->rx.airtime));
1099 		memset(&mdata->tx.airtime, 0, sizeof(mdata->tx.airtime));
1100 
1101 		if (mvm->tcm.result.low_latency[mac])
1102 			low_latency = true;
1103 	}
1104 	/* The TCM data needs to be reset before "paused" flag changes */
1105 	smp_mb();
1106 	mvm->tcm.paused = false;
1107 
1108 	/*
1109 	 * if the current load is not low or low latency is active, force
1110 	 * re-evaluation to cover the case of no traffic.
1111 	 */
1112 	if (mvm->tcm.result.global_load > IWL_MVM_TRAFFIC_LOW)
1113 		schedule_delayed_work(&mvm->tcm.work, MVM_TCM_PERIOD);
1114 	else if (low_latency)
1115 		schedule_delayed_work(&mvm->tcm.work, MVM_LL_PERIOD);
1116 
1117 	spin_unlock_bh(&mvm->tcm.lock);
1118 }
1119 
1120 void iwl_mvm_tcm_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1121 {
1122 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1123 
1124 	INIT_DELAYED_WORK(&mvmvif->uapsd_nonagg_detected_wk,
1125 			  iwl_mvm_tcm_uapsd_nonagg_detected_wk);
1126 }
1127 
1128 void iwl_mvm_tcm_rm_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1129 {
1130 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1131 
1132 	cancel_delayed_work_sync(&mvmvif->uapsd_nonagg_detected_wk);
1133 }
1134 
1135 u32 iwl_mvm_get_systime(struct iwl_mvm *mvm)
1136 {
1137 	u32 reg_addr = DEVICE_SYSTEM_TIME_REG;
1138 
1139 	if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_22000 &&
1140 	    mvm->trans->cfg->gp2_reg_addr)
1141 		reg_addr = mvm->trans->cfg->gp2_reg_addr;
1142 
1143 	return iwl_read_prph(mvm->trans, reg_addr);
1144 }
1145 
1146 void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, int clock_type,
1147 			   u32 *gp2, u64 *boottime, ktime_t *realtime)
1148 {
1149 	bool ps_disabled;
1150 
1151 	lockdep_assert_held(&mvm->mutex);
1152 
1153 	/* Disable power save when reading GP2 */
1154 	ps_disabled = mvm->ps_disabled;
1155 	if (!ps_disabled) {
1156 		mvm->ps_disabled = true;
1157 		iwl_mvm_power_update_device(mvm);
1158 	}
1159 
1160 	*gp2 = iwl_mvm_get_systime(mvm);
1161 
1162 	if (clock_type == CLOCK_BOOTTIME && boottime)
1163 		*boottime = ktime_get_boottime_ns();
1164 	else if (clock_type == CLOCK_REALTIME && realtime)
1165 		*realtime = ktime_get_real();
1166 
1167 	if (!ps_disabled) {
1168 		mvm->ps_disabled = ps_disabled;
1169 		iwl_mvm_power_update_device(mvm);
1170 	}
1171 }
1172 
1173 /* Find if at least two links from different vifs use same channel
1174  * FIXME: consider having a refcount array in struct iwl_mvm_vif for
1175  * used phy_ctxt ids.
1176  */
1177 bool iwl_mvm_have_links_same_channel(struct iwl_mvm_vif *vif1,
1178 				     struct iwl_mvm_vif *vif2)
1179 {
1180 	unsigned int i, j;
1181 
1182 	for_each_mvm_vif_valid_link(vif1, i) {
1183 		for_each_mvm_vif_valid_link(vif2, j) {
1184 			if (vif1->link[i]->phy_ctxt == vif2->link[j]->phy_ctxt)
1185 				return true;
1186 		}
1187 	}
1188 
1189 	return false;
1190 }
1191 
1192 bool iwl_mvm_vif_is_active(struct iwl_mvm_vif *mvmvif)
1193 {
1194 	unsigned int i;
1195 
1196 	/* FIXME: can it fail when phy_ctxt is assigned? */
1197 	for_each_mvm_vif_valid_link(mvmvif, i) {
1198 		if (mvmvif->link[i]->phy_ctxt &&
1199 		    mvmvif->link[i]->phy_ctxt->id < NUM_PHY_CTX)
1200 			return true;
1201 	}
1202 
1203 	return false;
1204 }
1205