1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2015, 2018-2022 Intel Corporation
4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
6  */
7 #include <net/mac80211.h>
8 
9 #include "mvm.h"
10 #include "sta.h"
11 #include "rs.h"
12 
13 /*
14  * New version of ADD_STA_sta command added new fields at the end of the
15  * structure, so sending the size of the relevant API's structure is enough to
16  * support both API versions.
17  */
18 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
19 {
20 	if (iwl_mvm_has_new_rx_api(mvm) ||
21 	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
22 		return sizeof(struct iwl_mvm_add_sta_cmd);
23 	else
24 		return sizeof(struct iwl_mvm_add_sta_cmd_v7);
25 }
26 
27 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
28 				    enum nl80211_iftype iftype)
29 {
30 	int sta_id;
31 	u32 reserved_ids = 0;
32 
33 	BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
34 	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
35 
36 	lockdep_assert_held(&mvm->mutex);
37 
38 	/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
39 	if (iftype != NL80211_IFTYPE_STATION)
40 		reserved_ids = BIT(0);
41 
42 	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
43 	for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
44 		if (BIT(sta_id) & reserved_ids)
45 			continue;
46 
47 		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
48 					       lockdep_is_held(&mvm->mutex)))
49 			return sta_id;
50 	}
51 	return IWL_MVM_INVALID_STA;
52 }
53 
54 /* send station add/update command to firmware */
55 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
56 			   bool update, unsigned int flags)
57 {
58 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
59 	struct iwl_mvm_add_sta_cmd add_sta_cmd = {
60 		.sta_id = mvm_sta->sta_id,
61 		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
62 		.add_modify = update ? 1 : 0,
63 		.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
64 						 STA_FLG_MIMO_EN_MSK |
65 						 STA_FLG_RTS_MIMO_PROT),
66 		.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
67 	};
68 	int ret;
69 	u32 status;
70 	u32 agg_size = 0, mpdu_dens = 0;
71 
72 	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
73 		add_sta_cmd.station_type = mvm_sta->sta_type;
74 
75 	if (!update || (flags & STA_MODIFY_QUEUES)) {
76 		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
77 
78 		if (!iwl_mvm_has_new_tx_api(mvm)) {
79 			add_sta_cmd.tfd_queue_msk =
80 				cpu_to_le32(mvm_sta->tfd_queue_msk);
81 
82 			if (flags & STA_MODIFY_QUEUES)
83 				add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
84 		} else {
85 			WARN_ON(flags & STA_MODIFY_QUEUES);
86 		}
87 	}
88 
89 	switch (sta->deflink.bandwidth) {
90 	case IEEE80211_STA_RX_BW_320:
91 	case IEEE80211_STA_RX_BW_160:
92 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
93 		fallthrough;
94 	case IEEE80211_STA_RX_BW_80:
95 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
96 		fallthrough;
97 	case IEEE80211_STA_RX_BW_40:
98 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
99 		fallthrough;
100 	case IEEE80211_STA_RX_BW_20:
101 		if (sta->deflink.ht_cap.ht_supported)
102 			add_sta_cmd.station_flags |=
103 				cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
104 		break;
105 	}
106 
107 	switch (sta->deflink.rx_nss) {
108 	case 1:
109 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
110 		break;
111 	case 2:
112 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
113 		break;
114 	case 3 ... 8:
115 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
116 		break;
117 	}
118 
119 	switch (sta->deflink.smps_mode) {
120 	case IEEE80211_SMPS_AUTOMATIC:
121 	case IEEE80211_SMPS_NUM_MODES:
122 		WARN_ON(1);
123 		break;
124 	case IEEE80211_SMPS_STATIC:
125 		/* override NSS */
126 		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
127 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
128 		break;
129 	case IEEE80211_SMPS_DYNAMIC:
130 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
131 		break;
132 	case IEEE80211_SMPS_OFF:
133 		/* nothing */
134 		break;
135 	}
136 
137 	if (sta->deflink.ht_cap.ht_supported) {
138 		add_sta_cmd.station_flags_msk |=
139 			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
140 				    STA_FLG_AGG_MPDU_DENS_MSK);
141 
142 		mpdu_dens = sta->deflink.ht_cap.ampdu_density;
143 	}
144 
145 	if (mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) {
146 		add_sta_cmd.station_flags_msk |=
147 			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
148 				    STA_FLG_AGG_MPDU_DENS_MSK);
149 
150 		mpdu_dens = le16_get_bits(sta->deflink.he_6ghz_capa.capa,
151 					  IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
152 		agg_size = le16_get_bits(sta->deflink.he_6ghz_capa.capa,
153 					 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
154 	} else if (sta->deflink.vht_cap.vht_supported) {
155 		agg_size = sta->deflink.vht_cap.cap &
156 			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
157 		agg_size >>=
158 			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
159 	} else if (sta->deflink.ht_cap.ht_supported) {
160 		agg_size = sta->deflink.ht_cap.ampdu_factor;
161 	}
162 
163 	/* D6.0 10.12.2 A-MPDU length limit rules
164 	 * A STA indicates the maximum length of the A-MPDU preEOF padding
165 	 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
166 	 * Exponent field in its HT Capabilities, VHT Capabilities,
167 	 * and HE 6 GHz Band Capabilities elements (if present) and the
168 	 * Maximum AMPDU Length Exponent Extension field in its HE
169 	 * Capabilities element
170 	 */
171 	if (sta->deflink.he_cap.has_he)
172 		agg_size += u8_get_bits(sta->deflink.he_cap.he_cap_elem.mac_cap_info[3],
173 					IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
174 
175 	/* Limit to max A-MPDU supported by FW */
176 	if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT))
177 		agg_size = (STA_FLG_MAX_AGG_SIZE_4M >>
178 			    STA_FLG_MAX_AGG_SIZE_SHIFT);
179 
180 	add_sta_cmd.station_flags |=
181 		cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
182 	add_sta_cmd.station_flags |=
183 		cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
184 	if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
185 		add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
186 
187 	if (sta->wme) {
188 		add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
189 
190 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
191 			add_sta_cmd.uapsd_acs |= BIT(AC_BK);
192 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
193 			add_sta_cmd.uapsd_acs |= BIT(AC_BE);
194 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
195 			add_sta_cmd.uapsd_acs |= BIT(AC_VI);
196 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
197 			add_sta_cmd.uapsd_acs |= BIT(AC_VO);
198 		add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
199 		add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
200 	}
201 
202 	status = ADD_STA_SUCCESS;
203 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
204 					  iwl_mvm_add_sta_cmd_size(mvm),
205 					  &add_sta_cmd, &status);
206 	if (ret)
207 		return ret;
208 
209 	switch (status & IWL_ADD_STA_STATUS_MASK) {
210 	case ADD_STA_SUCCESS:
211 		IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
212 		break;
213 	default:
214 		ret = -EIO;
215 		IWL_ERR(mvm, "ADD_STA failed\n");
216 		break;
217 	}
218 
219 	return ret;
220 }
221 
222 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
223 {
224 	struct iwl_mvm_baid_data *data =
225 		from_timer(data, t, session_timer);
226 	struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
227 	struct iwl_mvm_baid_data *ba_data;
228 	struct ieee80211_sta *sta;
229 	struct iwl_mvm_sta *mvm_sta;
230 	unsigned long timeout;
231 
232 	rcu_read_lock();
233 
234 	ba_data = rcu_dereference(*rcu_ptr);
235 
236 	if (WARN_ON(!ba_data))
237 		goto unlock;
238 
239 	if (!ba_data->timeout)
240 		goto unlock;
241 
242 	timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
243 	if (time_is_after_jiffies(timeout)) {
244 		mod_timer(&ba_data->session_timer, timeout);
245 		goto unlock;
246 	}
247 
248 	/* Timer expired */
249 	sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
250 
251 	/*
252 	 * sta should be valid unless the following happens:
253 	 * The firmware asserts which triggers a reconfig flow, but
254 	 * the reconfig fails before we set the pointer to sta into
255 	 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
256 	 * A-MDPU and hence the timer continues to run. Then, the
257 	 * timer expires and sta is NULL.
258 	 */
259 	if (!sta)
260 		goto unlock;
261 
262 	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
263 	ieee80211_rx_ba_timer_expired(mvm_sta->vif,
264 				      sta->addr, ba_data->tid);
265 unlock:
266 	rcu_read_unlock();
267 }
268 
269 /* Disable aggregations for a bitmap of TIDs for a given station */
270 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
271 					unsigned long disable_agg_tids,
272 					bool remove_queue)
273 {
274 	struct iwl_mvm_add_sta_cmd cmd = {};
275 	struct ieee80211_sta *sta;
276 	struct iwl_mvm_sta *mvmsta;
277 	u32 status;
278 	u8 sta_id;
279 
280 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
281 		return -EINVAL;
282 
283 	sta_id = mvm->queue_info[queue].ra_sta_id;
284 
285 	rcu_read_lock();
286 
287 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
288 
289 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
290 		rcu_read_unlock();
291 		return -EINVAL;
292 	}
293 
294 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
295 
296 	mvmsta->tid_disable_agg |= disable_agg_tids;
297 
298 	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
299 	cmd.sta_id = mvmsta->sta_id;
300 	cmd.add_modify = STA_MODE_MODIFY;
301 	cmd.modify_mask = STA_MODIFY_QUEUES;
302 	if (disable_agg_tids)
303 		cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
304 	if (remove_queue)
305 		cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
306 	cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
307 	cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
308 
309 	rcu_read_unlock();
310 
311 	/* Notify FW of queue removal from the STA queues */
312 	status = ADD_STA_SUCCESS;
313 	return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
314 					   iwl_mvm_add_sta_cmd_size(mvm),
315 					   &cmd, &status);
316 }
317 
318 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
319 			       int sta_id, u16 *queueptr, u8 tid)
320 {
321 	int queue = *queueptr;
322 	struct iwl_scd_txq_cfg_cmd cmd = {
323 		.scd_queue = queue,
324 		.action = SCD_CFG_DISABLE_QUEUE,
325 	};
326 	int ret;
327 
328 	lockdep_assert_held(&mvm->mutex);
329 
330 	if (iwl_mvm_has_new_tx_api(mvm)) {
331 		if (mvm->sta_remove_requires_queue_remove) {
332 			u32 cmd_id = WIDE_ID(DATA_PATH_GROUP,
333 					     SCD_QUEUE_CONFIG_CMD);
334 			struct iwl_scd_queue_cfg_cmd remove_cmd = {
335 				.operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE),
336 				.u.remove.tid = cpu_to_le32(tid),
337 				.u.remove.sta_mask = cpu_to_le32(BIT(sta_id)),
338 			};
339 
340 			ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0,
341 						   sizeof(remove_cmd),
342 						   &remove_cmd);
343 		} else {
344 			ret = 0;
345 		}
346 
347 		iwl_trans_txq_free(mvm->trans, queue);
348 		*queueptr = IWL_MVM_INVALID_QUEUE;
349 
350 		return ret;
351 	}
352 
353 	if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
354 		return 0;
355 
356 	mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
357 
358 	cmd.action = mvm->queue_info[queue].tid_bitmap ?
359 		SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
360 	if (cmd.action == SCD_CFG_DISABLE_QUEUE)
361 		mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
362 
363 	IWL_DEBUG_TX_QUEUES(mvm,
364 			    "Disabling TXQ #%d tids=0x%x\n",
365 			    queue,
366 			    mvm->queue_info[queue].tid_bitmap);
367 
368 	/* If the queue is still enabled - nothing left to do in this func */
369 	if (cmd.action == SCD_CFG_ENABLE_QUEUE)
370 		return 0;
371 
372 	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
373 	cmd.tid = mvm->queue_info[queue].txq_tid;
374 
375 	/* Make sure queue info is correct even though we overwrite it */
376 	WARN(mvm->queue_info[queue].tid_bitmap,
377 	     "TXQ #%d info out-of-sync - tids=0x%x\n",
378 	     queue, mvm->queue_info[queue].tid_bitmap);
379 
380 	/* If we are here - the queue is freed and we can zero out these vals */
381 	mvm->queue_info[queue].tid_bitmap = 0;
382 
383 	if (sta) {
384 		struct iwl_mvm_txq *mvmtxq =
385 			iwl_mvm_txq_from_tid(sta, tid);
386 
387 		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
388 		list_del_init(&mvmtxq->list);
389 	}
390 
391 	/* Regardless if this is a reserved TXQ for a STA - mark it as false */
392 	mvm->queue_info[queue].reserved = false;
393 
394 	iwl_trans_txq_disable(mvm->trans, queue, false);
395 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0,
396 				   sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
397 
398 	if (ret)
399 		IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
400 			queue, ret);
401 	return ret;
402 }
403 
404 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
405 {
406 	struct ieee80211_sta *sta;
407 	struct iwl_mvm_sta *mvmsta;
408 	unsigned long tid_bitmap;
409 	unsigned long agg_tids = 0;
410 	u8 sta_id;
411 	int tid;
412 
413 	lockdep_assert_held(&mvm->mutex);
414 
415 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
416 		return -EINVAL;
417 
418 	sta_id = mvm->queue_info[queue].ra_sta_id;
419 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
420 
421 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
422 					lockdep_is_held(&mvm->mutex));
423 
424 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
425 		return -EINVAL;
426 
427 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
428 
429 	spin_lock_bh(&mvmsta->lock);
430 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
431 		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
432 			agg_tids |= BIT(tid);
433 	}
434 	spin_unlock_bh(&mvmsta->lock);
435 
436 	return agg_tids;
437 }
438 
439 /*
440  * Remove a queue from a station's resources.
441  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
442  * doesn't disable the queue
443  */
444 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
445 {
446 	struct ieee80211_sta *sta;
447 	struct iwl_mvm_sta *mvmsta;
448 	unsigned long tid_bitmap;
449 	unsigned long disable_agg_tids = 0;
450 	u8 sta_id;
451 	int tid;
452 
453 	lockdep_assert_held(&mvm->mutex);
454 
455 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
456 		return -EINVAL;
457 
458 	sta_id = mvm->queue_info[queue].ra_sta_id;
459 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
460 
461 	rcu_read_lock();
462 
463 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
464 
465 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
466 		rcu_read_unlock();
467 		return 0;
468 	}
469 
470 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
471 
472 	spin_lock_bh(&mvmsta->lock);
473 	/* Unmap MAC queues and TIDs from this queue */
474 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
475 		struct iwl_mvm_txq *mvmtxq =
476 			iwl_mvm_txq_from_tid(sta, tid);
477 
478 		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
479 			disable_agg_tids |= BIT(tid);
480 		mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
481 
482 		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
483 		list_del_init(&mvmtxq->list);
484 	}
485 
486 	mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
487 	spin_unlock_bh(&mvmsta->lock);
488 
489 	rcu_read_unlock();
490 
491 	/*
492 	 * The TX path may have been using this TXQ_ID from the tid_data,
493 	 * so make sure it's no longer running so that we can safely reuse
494 	 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
495 	 * above, but nothing guarantees we've stopped using them. Thus,
496 	 * without this, we could get to iwl_mvm_disable_txq() and remove
497 	 * the queue while still sending frames to it.
498 	 */
499 	synchronize_net();
500 
501 	return disable_agg_tids;
502 }
503 
504 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
505 				       struct ieee80211_sta *old_sta,
506 				       u8 new_sta_id)
507 {
508 	struct iwl_mvm_sta *mvmsta;
509 	u8 sta_id, tid;
510 	unsigned long disable_agg_tids = 0;
511 	bool same_sta;
512 	u16 queue_tmp = queue;
513 	int ret;
514 
515 	lockdep_assert_held(&mvm->mutex);
516 
517 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
518 		return -EINVAL;
519 
520 	sta_id = mvm->queue_info[queue].ra_sta_id;
521 	tid = mvm->queue_info[queue].txq_tid;
522 
523 	same_sta = sta_id == new_sta_id;
524 
525 	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
526 	if (WARN_ON(!mvmsta))
527 		return -EINVAL;
528 
529 	disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
530 	/* Disable the queue */
531 	if (disable_agg_tids)
532 		iwl_mvm_invalidate_sta_queue(mvm, queue,
533 					     disable_agg_tids, false);
534 
535 	ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid);
536 	if (ret) {
537 		IWL_ERR(mvm,
538 			"Failed to free inactive queue %d (ret=%d)\n",
539 			queue, ret);
540 
541 		return ret;
542 	}
543 
544 	/* If TXQ is allocated to another STA, update removal in FW */
545 	if (!same_sta)
546 		iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
547 
548 	return 0;
549 }
550 
551 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
552 				    unsigned long tfd_queue_mask, u8 ac)
553 {
554 	int queue = 0;
555 	u8 ac_to_queue[IEEE80211_NUM_ACS];
556 	int i;
557 
558 	/*
559 	 * This protects us against grabbing a queue that's being reconfigured
560 	 * by the inactivity checker.
561 	 */
562 	lockdep_assert_held(&mvm->mutex);
563 
564 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
565 		return -EINVAL;
566 
567 	memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
568 
569 	/* See what ACs the existing queues for this STA have */
570 	for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
571 		/* Only DATA queues can be shared */
572 		if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
573 		    i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
574 			continue;
575 
576 		ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
577 	}
578 
579 	/*
580 	 * The queue to share is chosen only from DATA queues as follows (in
581 	 * descending priority):
582 	 * 1. An AC_BE queue
583 	 * 2. Same AC queue
584 	 * 3. Highest AC queue that is lower than new AC
585 	 * 4. Any existing AC (there always is at least 1 DATA queue)
586 	 */
587 
588 	/* Priority 1: An AC_BE queue */
589 	if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
590 		queue = ac_to_queue[IEEE80211_AC_BE];
591 	/* Priority 2: Same AC queue */
592 	else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
593 		queue = ac_to_queue[ac];
594 	/* Priority 3a: If new AC is VO and VI exists - use VI */
595 	else if (ac == IEEE80211_AC_VO &&
596 		 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
597 		queue = ac_to_queue[IEEE80211_AC_VI];
598 	/* Priority 3b: No BE so only AC less than the new one is BK */
599 	else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
600 		queue = ac_to_queue[IEEE80211_AC_BK];
601 	/* Priority 4a: No BE nor BK - use VI if exists */
602 	else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
603 		queue = ac_to_queue[IEEE80211_AC_VI];
604 	/* Priority 4b: No BE, BK nor VI - use VO if exists */
605 	else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
606 		queue = ac_to_queue[IEEE80211_AC_VO];
607 
608 	/* Make sure queue found (or not) is legal */
609 	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
610 	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
611 	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
612 		IWL_ERR(mvm, "No DATA queues available to share\n");
613 		return -ENOSPC;
614 	}
615 
616 	return queue;
617 }
618 
619 /* Re-configure the SCD for a queue that has already been configured */
620 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo,
621 				int sta_id, int tid, int frame_limit, u16 ssn)
622 {
623 	struct iwl_scd_txq_cfg_cmd cmd = {
624 		.scd_queue = queue,
625 		.action = SCD_CFG_ENABLE_QUEUE,
626 		.window = frame_limit,
627 		.sta_id = sta_id,
628 		.ssn = cpu_to_le16(ssn),
629 		.tx_fifo = fifo,
630 		.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
631 			      queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
632 		.tid = tid,
633 	};
634 	int ret;
635 
636 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
637 		return -EINVAL;
638 
639 	if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
640 		 "Trying to reconfig unallocated queue %d\n", queue))
641 		return -ENXIO;
642 
643 	IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
644 
645 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
646 	WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
647 		  queue, fifo, ret);
648 
649 	return ret;
650 }
651 
652 /*
653  * If a given queue has a higher AC than the TID stream that is being compared
654  * to, the queue needs to be redirected to the lower AC. This function does that
655  * in such a case, otherwise - if no redirection required - it does nothing,
656  * unless the %force param is true.
657  */
658 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
659 				  int ac, int ssn, unsigned int wdg_timeout,
660 				  bool force, struct iwl_mvm_txq *txq)
661 {
662 	struct iwl_scd_txq_cfg_cmd cmd = {
663 		.scd_queue = queue,
664 		.action = SCD_CFG_DISABLE_QUEUE,
665 	};
666 	bool shared_queue;
667 	int ret;
668 
669 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
670 		return -EINVAL;
671 
672 	/*
673 	 * If the AC is lower than current one - FIFO needs to be redirected to
674 	 * the lowest one of the streams in the queue. Check if this is needed
675 	 * here.
676 	 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
677 	 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
678 	 * we need to check if the numerical value of X is LARGER than of Y.
679 	 */
680 	if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
681 		IWL_DEBUG_TX_QUEUES(mvm,
682 				    "No redirection needed on TXQ #%d\n",
683 				    queue);
684 		return 0;
685 	}
686 
687 	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
688 	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
689 	cmd.tid = mvm->queue_info[queue].txq_tid;
690 	shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
691 
692 	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
693 			    queue, iwl_mvm_ac_to_tx_fifo[ac]);
694 
695 	/* Stop the queue and wait for it to empty */
696 	txq->stopped = true;
697 
698 	ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
699 	if (ret) {
700 		IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
701 			queue);
702 		ret = -EIO;
703 		goto out;
704 	}
705 
706 	/* Before redirecting the queue we need to de-activate it */
707 	iwl_trans_txq_disable(mvm->trans, queue, false);
708 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
709 	if (ret)
710 		IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
711 			ret);
712 
713 	/* Make sure the SCD wrptr is correctly set before reconfiguring */
714 	iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
715 
716 	/* Update the TID "owner" of the queue */
717 	mvm->queue_info[queue].txq_tid = tid;
718 
719 	/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
720 
721 	/* Redirect to lower AC */
722 	iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
723 			     cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
724 
725 	/* Update AC marking of the queue */
726 	mvm->queue_info[queue].mac80211_ac = ac;
727 
728 	/*
729 	 * Mark queue as shared in transport if shared
730 	 * Note this has to be done after queue enablement because enablement
731 	 * can also set this value, and there is no indication there to shared
732 	 * queues
733 	 */
734 	if (shared_queue)
735 		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
736 
737 out:
738 	/* Continue using the queue */
739 	txq->stopped = false;
740 
741 	return ret;
742 }
743 
744 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
745 				   u8 minq, u8 maxq)
746 {
747 	int i;
748 
749 	lockdep_assert_held(&mvm->mutex);
750 
751 	if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
752 		 "max queue %d >= num_of_queues (%d)", maxq,
753 		 mvm->trans->trans_cfg->base_params->num_of_queues))
754 		maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
755 
756 	/* This should not be hit with new TX path */
757 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
758 		return -ENOSPC;
759 
760 	/* Start by looking for a free queue */
761 	for (i = minq; i <= maxq; i++)
762 		if (mvm->queue_info[i].tid_bitmap == 0 &&
763 		    mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
764 			return i;
765 
766 	return -ENOSPC;
767 }
768 
769 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
770 				   u8 sta_id, u8 tid, unsigned int timeout)
771 {
772 	int queue, size;
773 
774 	if (tid == IWL_MAX_TID_COUNT) {
775 		tid = IWL_MGMT_TID;
776 		size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
777 			     mvm->trans->cfg->min_txq_size);
778 	} else {
779 		struct ieee80211_sta *sta;
780 
781 		rcu_read_lock();
782 		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
783 
784 		/* this queue isn't used for traffic (cab_queue) */
785 		if (IS_ERR_OR_NULL(sta)) {
786 			size = IWL_MGMT_QUEUE_SIZE;
787 		} else if (sta->deflink.he_cap.has_he) {
788 			/* support for 256 ba size */
789 			size = IWL_DEFAULT_QUEUE_SIZE_HE;
790 		} else {
791 			size = IWL_DEFAULT_QUEUE_SIZE;
792 		}
793 
794 		rcu_read_unlock();
795 	}
796 
797 	/* take the min with bc tbl entries allowed */
798 	size = min_t(u32, size, mvm->trans->txqs.bc_tbl_size / sizeof(u16));
799 
800 	/* size needs to be power of 2 values for calculating read/write pointers */
801 	size = rounddown_pow_of_two(size);
802 
803 	do {
804 		queue = iwl_trans_txq_alloc(mvm->trans, 0, BIT(sta_id),
805 					    tid, size, timeout);
806 
807 		if (queue < 0)
808 			IWL_DEBUG_TX_QUEUES(mvm,
809 					    "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n",
810 					    size, sta_id, tid, queue);
811 		size /= 2;
812 	} while (queue < 0 && size >= 16);
813 
814 	if (queue < 0)
815 		return queue;
816 
817 	IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
818 			    queue, sta_id, tid);
819 
820 	return queue;
821 }
822 
823 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
824 					struct ieee80211_sta *sta, u8 ac,
825 					int tid)
826 {
827 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
828 	struct iwl_mvm_txq *mvmtxq =
829 		iwl_mvm_txq_from_tid(sta, tid);
830 	unsigned int wdg_timeout =
831 		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
832 	int queue = -1;
833 
834 	lockdep_assert_held(&mvm->mutex);
835 
836 	IWL_DEBUG_TX_QUEUES(mvm,
837 			    "Allocating queue for sta %d on tid %d\n",
838 			    mvmsta->sta_id, tid);
839 	queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
840 	if (queue < 0)
841 		return queue;
842 
843 	mvmtxq->txq_id = queue;
844 	mvm->tvqm_info[queue].txq_tid = tid;
845 	mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;
846 
847 	IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
848 
849 	spin_lock_bh(&mvmsta->lock);
850 	mvmsta->tid_data[tid].txq_id = queue;
851 	spin_unlock_bh(&mvmsta->lock);
852 
853 	return 0;
854 }
855 
856 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
857 				       struct ieee80211_sta *sta,
858 				       int queue, u8 sta_id, u8 tid)
859 {
860 	bool enable_queue = true;
861 
862 	/* Make sure this TID isn't already enabled */
863 	if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
864 		IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
865 			queue, tid);
866 		return false;
867 	}
868 
869 	/* Update mappings and refcounts */
870 	if (mvm->queue_info[queue].tid_bitmap)
871 		enable_queue = false;
872 
873 	mvm->queue_info[queue].tid_bitmap |= BIT(tid);
874 	mvm->queue_info[queue].ra_sta_id = sta_id;
875 
876 	if (enable_queue) {
877 		if (tid != IWL_MAX_TID_COUNT)
878 			mvm->queue_info[queue].mac80211_ac =
879 				tid_to_mac80211_ac[tid];
880 		else
881 			mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
882 
883 		mvm->queue_info[queue].txq_tid = tid;
884 	}
885 
886 	if (sta) {
887 		struct iwl_mvm_txq *mvmtxq =
888 			iwl_mvm_txq_from_tid(sta, tid);
889 
890 		mvmtxq->txq_id = queue;
891 	}
892 
893 	IWL_DEBUG_TX_QUEUES(mvm,
894 			    "Enabling TXQ #%d tids=0x%x\n",
895 			    queue, mvm->queue_info[queue].tid_bitmap);
896 
897 	return enable_queue;
898 }
899 
900 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
901 			       int queue, u16 ssn,
902 			       const struct iwl_trans_txq_scd_cfg *cfg,
903 			       unsigned int wdg_timeout)
904 {
905 	struct iwl_scd_txq_cfg_cmd cmd = {
906 		.scd_queue = queue,
907 		.action = SCD_CFG_ENABLE_QUEUE,
908 		.window = cfg->frame_limit,
909 		.sta_id = cfg->sta_id,
910 		.ssn = cpu_to_le16(ssn),
911 		.tx_fifo = cfg->fifo,
912 		.aggregate = cfg->aggregate,
913 		.tid = cfg->tid,
914 	};
915 	bool inc_ssn;
916 
917 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
918 		return false;
919 
920 	/* Send the enabling command if we need to */
921 	if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
922 		return false;
923 
924 	inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
925 					   NULL, wdg_timeout);
926 	if (inc_ssn)
927 		le16_add_cpu(&cmd.ssn, 1);
928 
929 	WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
930 	     "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
931 
932 	return inc_ssn;
933 }
934 
935 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
936 {
937 	struct iwl_scd_txq_cfg_cmd cmd = {
938 		.scd_queue = queue,
939 		.action = SCD_CFG_UPDATE_QUEUE_TID,
940 	};
941 	int tid;
942 	unsigned long tid_bitmap;
943 	int ret;
944 
945 	lockdep_assert_held(&mvm->mutex);
946 
947 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
948 		return;
949 
950 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
951 
952 	if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
953 		return;
954 
955 	/* Find any TID for queue */
956 	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
957 	cmd.tid = tid;
958 	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
959 
960 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
961 	if (ret) {
962 		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
963 			queue, ret);
964 		return;
965 	}
966 
967 	mvm->queue_info[queue].txq_tid = tid;
968 	IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
969 			    queue, tid);
970 }
971 
972 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
973 {
974 	struct ieee80211_sta *sta;
975 	struct iwl_mvm_sta *mvmsta;
976 	u8 sta_id;
977 	int tid = -1;
978 	unsigned long tid_bitmap;
979 	unsigned int wdg_timeout;
980 	int ssn;
981 	int ret = true;
982 
983 	/* queue sharing is disabled on new TX path */
984 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
985 		return;
986 
987 	lockdep_assert_held(&mvm->mutex);
988 
989 	sta_id = mvm->queue_info[queue].ra_sta_id;
990 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
991 
992 	/* Find TID for queue, and make sure it is the only one on the queue */
993 	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
994 	if (tid_bitmap != BIT(tid)) {
995 		IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
996 			queue, tid_bitmap);
997 		return;
998 	}
999 
1000 	IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1001 			    tid);
1002 
1003 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1004 					lockdep_is_held(&mvm->mutex));
1005 
1006 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1007 		return;
1008 
1009 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1010 	wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1011 
1012 	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1013 
1014 	ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1015 				     tid_to_mac80211_ac[tid], ssn,
1016 				     wdg_timeout, true,
1017 				     iwl_mvm_txq_from_tid(sta, tid));
1018 	if (ret) {
1019 		IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1020 		return;
1021 	}
1022 
1023 	/* If aggs should be turned back on - do it */
1024 	if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1025 		struct iwl_mvm_add_sta_cmd cmd = {0};
1026 
1027 		mvmsta->tid_disable_agg &= ~BIT(tid);
1028 
1029 		cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1030 		cmd.sta_id = mvmsta->sta_id;
1031 		cmd.add_modify = STA_MODE_MODIFY;
1032 		cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1033 		cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1034 		cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1035 
1036 		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1037 					   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1038 		if (!ret) {
1039 			IWL_DEBUG_TX_QUEUES(mvm,
1040 					    "TXQ #%d is now aggregated again\n",
1041 					    queue);
1042 
1043 			/* Mark queue intenally as aggregating again */
1044 			iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1045 		}
1046 	}
1047 
1048 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1049 }
1050 
1051 /*
1052  * Remove inactive TIDs of a given queue.
1053  * If all queue TIDs are inactive - mark the queue as inactive
1054  * If only some the queue TIDs are inactive - unmap them from the queue
1055  *
1056  * Returns %true if all TIDs were removed and the queue could be reused.
1057  */
1058 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1059 					 struct iwl_mvm_sta *mvmsta, int queue,
1060 					 unsigned long tid_bitmap,
1061 					 unsigned long *unshare_queues,
1062 					 unsigned long *changetid_queues)
1063 {
1064 	unsigned int tid;
1065 
1066 	lockdep_assert_held(&mvmsta->lock);
1067 	lockdep_assert_held(&mvm->mutex);
1068 
1069 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1070 		return false;
1071 
1072 	/* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1073 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1074 		/* If some TFDs are still queued - don't mark TID as inactive */
1075 		if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1076 			tid_bitmap &= ~BIT(tid);
1077 
1078 		/* Don't mark as inactive any TID that has an active BA */
1079 		if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1080 			tid_bitmap &= ~BIT(tid);
1081 	}
1082 
1083 	/* If all TIDs in the queue are inactive - return it can be reused */
1084 	if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1085 		IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1086 		return true;
1087 	}
1088 
1089 	/*
1090 	 * If we are here, this is a shared queue and not all TIDs timed-out.
1091 	 * Remove the ones that did.
1092 	 */
1093 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1094 		u16 q_tid_bitmap;
1095 
1096 		mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1097 		mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1098 
1099 		q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1100 
1101 		/*
1102 		 * We need to take into account a situation in which a TXQ was
1103 		 * allocated to TID x, and then turned shared by adding TIDs y
1104 		 * and z. If TID x becomes inactive and is removed from the TXQ,
1105 		 * ownership must be given to one of the remaining TIDs.
1106 		 * This is mainly because if TID x continues - a new queue can't
1107 		 * be allocated for it as long as it is an owner of another TXQ.
1108 		 *
1109 		 * Mark this queue in the right bitmap, we'll send the command
1110 		 * to the firmware later.
1111 		 */
1112 		if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1113 			set_bit(queue, changetid_queues);
1114 
1115 		IWL_DEBUG_TX_QUEUES(mvm,
1116 				    "Removing inactive TID %d from shared Q:%d\n",
1117 				    tid, queue);
1118 	}
1119 
1120 	IWL_DEBUG_TX_QUEUES(mvm,
1121 			    "TXQ #%d left with tid bitmap 0x%x\n", queue,
1122 			    mvm->queue_info[queue].tid_bitmap);
1123 
1124 	/*
1125 	 * There may be different TIDs with the same mac queues, so make
1126 	 * sure all TIDs have existing corresponding mac queues enabled
1127 	 */
1128 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1129 
1130 	/* If the queue is marked as shared - "unshare" it */
1131 	if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1132 	    mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1133 		IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1134 				    queue);
1135 		set_bit(queue, unshare_queues);
1136 	}
1137 
1138 	return false;
1139 }
1140 
1141 /*
1142  * Check for inactivity - this includes checking if any queue
1143  * can be unshared and finding one (and only one) that can be
1144  * reused.
1145  * This function is also invoked as a sort of clean-up task,
1146  * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1147  *
1148  * Returns the queue number, or -ENOSPC.
1149  */
1150 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1151 {
1152 	unsigned long now = jiffies;
1153 	unsigned long unshare_queues = 0;
1154 	unsigned long changetid_queues = 0;
1155 	int i, ret, free_queue = -ENOSPC;
1156 	struct ieee80211_sta *queue_owner  = NULL;
1157 
1158 	lockdep_assert_held(&mvm->mutex);
1159 
1160 	if (iwl_mvm_has_new_tx_api(mvm))
1161 		return -ENOSPC;
1162 
1163 	rcu_read_lock();
1164 
1165 	/* we skip the CMD queue below by starting at 1 */
1166 	BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1167 
1168 	for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1169 		struct ieee80211_sta *sta;
1170 		struct iwl_mvm_sta *mvmsta;
1171 		u8 sta_id;
1172 		int tid;
1173 		unsigned long inactive_tid_bitmap = 0;
1174 		unsigned long queue_tid_bitmap;
1175 
1176 		queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1177 		if (!queue_tid_bitmap)
1178 			continue;
1179 
1180 		/* If TXQ isn't in active use anyway - nothing to do here... */
1181 		if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1182 		    mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1183 			continue;
1184 
1185 		/* Check to see if there are inactive TIDs on this queue */
1186 		for_each_set_bit(tid, &queue_tid_bitmap,
1187 				 IWL_MAX_TID_COUNT + 1) {
1188 			if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1189 				       IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1190 				continue;
1191 
1192 			inactive_tid_bitmap |= BIT(tid);
1193 		}
1194 
1195 		/* If all TIDs are active - finish check on this queue */
1196 		if (!inactive_tid_bitmap)
1197 			continue;
1198 
1199 		/*
1200 		 * If we are here - the queue hadn't been served recently and is
1201 		 * in use
1202 		 */
1203 
1204 		sta_id = mvm->queue_info[i].ra_sta_id;
1205 		sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1206 
1207 		/*
1208 		 * If the STA doesn't exist anymore, it isn't an error. It could
1209 		 * be that it was removed since getting the queues, and in this
1210 		 * case it should've inactivated its queues anyway.
1211 		 */
1212 		if (IS_ERR_OR_NULL(sta))
1213 			continue;
1214 
1215 		mvmsta = iwl_mvm_sta_from_mac80211(sta);
1216 
1217 		spin_lock_bh(&mvmsta->lock);
1218 		ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1219 						   inactive_tid_bitmap,
1220 						   &unshare_queues,
1221 						   &changetid_queues);
1222 		if (ret && free_queue < 0) {
1223 			queue_owner = sta;
1224 			free_queue = i;
1225 		}
1226 		/* only unlock sta lock - we still need the queue info lock */
1227 		spin_unlock_bh(&mvmsta->lock);
1228 	}
1229 
1230 
1231 	/* Reconfigure queues requiring reconfiguation */
1232 	for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1233 		iwl_mvm_unshare_queue(mvm, i);
1234 	for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1235 		iwl_mvm_change_queue_tid(mvm, i);
1236 
1237 	rcu_read_unlock();
1238 
1239 	if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1240 		ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1241 						  alloc_for_sta);
1242 		if (ret)
1243 			return ret;
1244 	}
1245 
1246 	return free_queue;
1247 }
1248 
1249 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1250 				   struct ieee80211_sta *sta, u8 ac, int tid)
1251 {
1252 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1253 	struct iwl_trans_txq_scd_cfg cfg = {
1254 		.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1255 		.sta_id = mvmsta->sta_id,
1256 		.tid = tid,
1257 		.frame_limit = IWL_FRAME_LIMIT,
1258 	};
1259 	unsigned int wdg_timeout =
1260 		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1261 	int queue = -1;
1262 	u16 queue_tmp;
1263 	unsigned long disable_agg_tids = 0;
1264 	enum iwl_mvm_agg_state queue_state;
1265 	bool shared_queue = false, inc_ssn;
1266 	int ssn;
1267 	unsigned long tfd_queue_mask;
1268 	int ret;
1269 
1270 	lockdep_assert_held(&mvm->mutex);
1271 
1272 	if (iwl_mvm_has_new_tx_api(mvm))
1273 		return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1274 
1275 	spin_lock_bh(&mvmsta->lock);
1276 	tfd_queue_mask = mvmsta->tfd_queue_msk;
1277 	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1278 	spin_unlock_bh(&mvmsta->lock);
1279 
1280 	if (tid == IWL_MAX_TID_COUNT) {
1281 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1282 						IWL_MVM_DQA_MIN_MGMT_QUEUE,
1283 						IWL_MVM_DQA_MAX_MGMT_QUEUE);
1284 		if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1285 			IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1286 					    queue);
1287 
1288 		/* If no such queue is found, we'll use a DATA queue instead */
1289 	}
1290 
1291 	if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1292 	    (mvm->queue_info[mvmsta->reserved_queue].status ==
1293 			IWL_MVM_QUEUE_RESERVED)) {
1294 		queue = mvmsta->reserved_queue;
1295 		mvm->queue_info[queue].reserved = true;
1296 		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1297 	}
1298 
1299 	if (queue < 0)
1300 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1301 						IWL_MVM_DQA_MIN_DATA_QUEUE,
1302 						IWL_MVM_DQA_MAX_DATA_QUEUE);
1303 	if (queue < 0) {
1304 		/* try harder - perhaps kill an inactive queue */
1305 		queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1306 	}
1307 
1308 	/* No free queue - we'll have to share */
1309 	if (queue <= 0) {
1310 		queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1311 		if (queue > 0) {
1312 			shared_queue = true;
1313 			mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1314 		}
1315 	}
1316 
1317 	/*
1318 	 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1319 	 * to make sure no one else takes it.
1320 	 * This will allow avoiding re-acquiring the lock at the end of the
1321 	 * configuration. On error we'll mark it back as free.
1322 	 */
1323 	if (queue > 0 && !shared_queue)
1324 		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1325 
1326 	/* This shouldn't happen - out of queues */
1327 	if (WARN_ON(queue <= 0)) {
1328 		IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1329 			tid, cfg.sta_id);
1330 		return queue;
1331 	}
1332 
1333 	/*
1334 	 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1335 	 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1336 	 * as aggregatable.
1337 	 * Mark all DATA queues as allowing to be aggregated at some point
1338 	 */
1339 	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1340 			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1341 
1342 	IWL_DEBUG_TX_QUEUES(mvm,
1343 			    "Allocating %squeue #%d to sta %d on tid %d\n",
1344 			    shared_queue ? "shared " : "", queue,
1345 			    mvmsta->sta_id, tid);
1346 
1347 	if (shared_queue) {
1348 		/* Disable any open aggs on this queue */
1349 		disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1350 
1351 		if (disable_agg_tids) {
1352 			IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1353 					    queue);
1354 			iwl_mvm_invalidate_sta_queue(mvm, queue,
1355 						     disable_agg_tids, false);
1356 		}
1357 	}
1358 
1359 	inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1360 
1361 	/*
1362 	 * Mark queue as shared in transport if shared
1363 	 * Note this has to be done after queue enablement because enablement
1364 	 * can also set this value, and there is no indication there to shared
1365 	 * queues
1366 	 */
1367 	if (shared_queue)
1368 		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1369 
1370 	spin_lock_bh(&mvmsta->lock);
1371 	/*
1372 	 * This looks racy, but it is not. We have only one packet for
1373 	 * this ra/tid in our Tx path since we stop the Qdisc when we
1374 	 * need to allocate a new TFD queue.
1375 	 */
1376 	if (inc_ssn) {
1377 		mvmsta->tid_data[tid].seq_number += 0x10;
1378 		ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1379 	}
1380 	mvmsta->tid_data[tid].txq_id = queue;
1381 	mvmsta->tfd_queue_msk |= BIT(queue);
1382 	queue_state = mvmsta->tid_data[tid].state;
1383 
1384 	if (mvmsta->reserved_queue == queue)
1385 		mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1386 	spin_unlock_bh(&mvmsta->lock);
1387 
1388 	if (!shared_queue) {
1389 		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1390 		if (ret)
1391 			goto out_err;
1392 
1393 		/* If we need to re-enable aggregations... */
1394 		if (queue_state == IWL_AGG_ON) {
1395 			ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1396 			if (ret)
1397 				goto out_err;
1398 		}
1399 	} else {
1400 		/* Redirect queue, if needed */
1401 		ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1402 					     wdg_timeout, false,
1403 					     iwl_mvm_txq_from_tid(sta, tid));
1404 		if (ret)
1405 			goto out_err;
1406 	}
1407 
1408 	return 0;
1409 
1410 out_err:
1411 	queue_tmp = queue;
1412 	iwl_mvm_disable_txq(mvm, sta, mvmsta->sta_id, &queue_tmp, tid);
1413 
1414 	return ret;
1415 }
1416 
1417 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1418 {
1419 	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1420 					   add_stream_wk);
1421 
1422 	mutex_lock(&mvm->mutex);
1423 
1424 	iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1425 
1426 	while (!list_empty(&mvm->add_stream_txqs)) {
1427 		struct iwl_mvm_txq *mvmtxq;
1428 		struct ieee80211_txq *txq;
1429 		u8 tid;
1430 
1431 		mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1432 					  struct iwl_mvm_txq, list);
1433 
1434 		txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1435 				   drv_priv);
1436 		tid = txq->tid;
1437 		if (tid == IEEE80211_NUM_TIDS)
1438 			tid = IWL_MAX_TID_COUNT;
1439 
1440 		/*
1441 		 * We can't really do much here, but if this fails we can't
1442 		 * transmit anyway - so just don't transmit the frame etc.
1443 		 * and let them back up ... we've tried our best to allocate
1444 		 * a queue in the function itself.
1445 		 */
1446 		if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1447 			list_del_init(&mvmtxq->list);
1448 			continue;
1449 		}
1450 
1451 		list_del_init(&mvmtxq->list);
1452 		local_bh_disable();
1453 		iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1454 		local_bh_enable();
1455 	}
1456 
1457 	mutex_unlock(&mvm->mutex);
1458 }
1459 
1460 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1461 				      struct ieee80211_sta *sta,
1462 				      enum nl80211_iftype vif_type)
1463 {
1464 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1465 	int queue;
1466 
1467 	/* queue reserving is disabled on new TX path */
1468 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1469 		return 0;
1470 
1471 	/* run the general cleanup/unsharing of queues */
1472 	iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1473 
1474 	/* Make sure we have free resources for this STA */
1475 	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1476 	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1477 	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1478 	     IWL_MVM_QUEUE_FREE))
1479 		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1480 	else
1481 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1482 						IWL_MVM_DQA_MIN_DATA_QUEUE,
1483 						IWL_MVM_DQA_MAX_DATA_QUEUE);
1484 	if (queue < 0) {
1485 		/* try again - this time kick out a queue if needed */
1486 		queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1487 		if (queue < 0) {
1488 			IWL_ERR(mvm, "No available queues for new station\n");
1489 			return -ENOSPC;
1490 		}
1491 	}
1492 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1493 
1494 	mvmsta->reserved_queue = queue;
1495 
1496 	IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1497 			    queue, mvmsta->sta_id);
1498 
1499 	return 0;
1500 }
1501 
1502 /*
1503  * In DQA mode, after a HW restart the queues should be allocated as before, in
1504  * order to avoid race conditions when there are shared queues. This function
1505  * does the re-mapping and queue allocation.
1506  *
1507  * Note that re-enabling aggregations isn't done in this function.
1508  */
1509 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1510 						 struct ieee80211_sta *sta)
1511 {
1512 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1513 	unsigned int wdg =
1514 		iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1515 	int i;
1516 	struct iwl_trans_txq_scd_cfg cfg = {
1517 		.sta_id = mvm_sta->sta_id,
1518 		.frame_limit = IWL_FRAME_LIMIT,
1519 	};
1520 
1521 	/* Make sure reserved queue is still marked as such (if allocated) */
1522 	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1523 		mvm->queue_info[mvm_sta->reserved_queue].status =
1524 			IWL_MVM_QUEUE_RESERVED;
1525 
1526 	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1527 		struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1528 		int txq_id = tid_data->txq_id;
1529 		int ac;
1530 
1531 		if (txq_id == IWL_MVM_INVALID_QUEUE)
1532 			continue;
1533 
1534 		ac = tid_to_mac80211_ac[i];
1535 
1536 		if (iwl_mvm_has_new_tx_api(mvm)) {
1537 			IWL_DEBUG_TX_QUEUES(mvm,
1538 					    "Re-mapping sta %d tid %d\n",
1539 					    mvm_sta->sta_id, i);
1540 			txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
1541 							 i, wdg);
1542 			/*
1543 			 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1544 			 * to try again later, we have no other good way of
1545 			 * failing here
1546 			 */
1547 			if (txq_id < 0)
1548 				txq_id = IWL_MVM_INVALID_QUEUE;
1549 			tid_data->txq_id = txq_id;
1550 
1551 			/*
1552 			 * Since we don't set the seq number after reset, and HW
1553 			 * sets it now, FW reset will cause the seq num to start
1554 			 * at 0 again, so driver will need to update it
1555 			 * internally as well, so it keeps in sync with real val
1556 			 */
1557 			tid_data->seq_number = 0;
1558 		} else {
1559 			u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1560 
1561 			cfg.tid = i;
1562 			cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1563 			cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1564 					 txq_id ==
1565 					 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1566 
1567 			IWL_DEBUG_TX_QUEUES(mvm,
1568 					    "Re-mapping sta %d tid %d to queue %d\n",
1569 					    mvm_sta->sta_id, i, txq_id);
1570 
1571 			iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1572 			mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1573 		}
1574 	}
1575 }
1576 
1577 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1578 				      struct iwl_mvm_int_sta *sta,
1579 				      const u8 *addr,
1580 				      u16 mac_id, u16 color)
1581 {
1582 	struct iwl_mvm_add_sta_cmd cmd;
1583 	int ret;
1584 	u32 status = ADD_STA_SUCCESS;
1585 
1586 	lockdep_assert_held(&mvm->mutex);
1587 
1588 	memset(&cmd, 0, sizeof(cmd));
1589 	cmd.sta_id = sta->sta_id;
1590 
1591 	if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12 &&
1592 	    sta->type == IWL_STA_AUX_ACTIVITY)
1593 		cmd.mac_id_n_color = cpu_to_le32(mac_id);
1594 	else
1595 		cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1596 								     color));
1597 
1598 	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1599 		cmd.station_type = sta->type;
1600 
1601 	if (!iwl_mvm_has_new_tx_api(mvm))
1602 		cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1603 	cmd.tid_disable_tx = cpu_to_le16(0xffff);
1604 
1605 	if (addr)
1606 		memcpy(cmd.addr, addr, ETH_ALEN);
1607 
1608 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1609 					  iwl_mvm_add_sta_cmd_size(mvm),
1610 					  &cmd, &status);
1611 	if (ret)
1612 		return ret;
1613 
1614 	switch (status & IWL_ADD_STA_STATUS_MASK) {
1615 	case ADD_STA_SUCCESS:
1616 		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1617 		return 0;
1618 	default:
1619 		ret = -EIO;
1620 		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1621 			status);
1622 		break;
1623 	}
1624 	return ret;
1625 }
1626 
1627 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1628 		    struct ieee80211_vif *vif,
1629 		    struct ieee80211_sta *sta)
1630 {
1631 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1632 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1633 	struct iwl_mvm_rxq_dup_data *dup_data;
1634 	int i, ret, sta_id;
1635 	bool sta_update = false;
1636 	unsigned int sta_flags = 0;
1637 
1638 	lockdep_assert_held(&mvm->mutex);
1639 
1640 	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1641 		sta_id = iwl_mvm_find_free_sta_id(mvm,
1642 						  ieee80211_vif_type_p2p(vif));
1643 	else
1644 		sta_id = mvm_sta->sta_id;
1645 
1646 	if (sta_id == IWL_MVM_INVALID_STA)
1647 		return -ENOSPC;
1648 
1649 	spin_lock_init(&mvm_sta->lock);
1650 
1651 	/* if this is a HW restart re-alloc existing queues */
1652 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1653 		struct iwl_mvm_int_sta tmp_sta = {
1654 			.sta_id = sta_id,
1655 			.type = mvm_sta->sta_type,
1656 		};
1657 
1658 		/*
1659 		 * First add an empty station since allocating
1660 		 * a queue requires a valid station
1661 		 */
1662 		ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1663 						 mvmvif->id, mvmvif->color);
1664 		if (ret)
1665 			goto err;
1666 
1667 		iwl_mvm_realloc_queues_after_restart(mvm, sta);
1668 		sta_update = true;
1669 		sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1670 		goto update_fw;
1671 	}
1672 
1673 	mvm_sta->sta_id = sta_id;
1674 	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1675 						      mvmvif->color);
1676 	mvm_sta->vif = vif;
1677 	if (!mvm->trans->trans_cfg->gen2)
1678 		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1679 	else
1680 		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1681 	mvm_sta->tx_protection = 0;
1682 	mvm_sta->tt_tx_protection = false;
1683 	mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1684 
1685 	/* HW restart, don't assume the memory has been zeroed */
1686 	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1687 	mvm_sta->tfd_queue_msk = 0;
1688 
1689 	/* for HW restart - reset everything but the sequence number */
1690 	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1691 		u16 seq = mvm_sta->tid_data[i].seq_number;
1692 		memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1693 		mvm_sta->tid_data[i].seq_number = seq;
1694 
1695 		/*
1696 		 * Mark all queues for this STA as unallocated and defer TX
1697 		 * frames until the queue is allocated
1698 		 */
1699 		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1700 	}
1701 
1702 	for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1703 		struct iwl_mvm_txq *mvmtxq =
1704 			iwl_mvm_txq_from_mac80211(sta->txq[i]);
1705 
1706 		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1707 		INIT_LIST_HEAD(&mvmtxq->list);
1708 		atomic_set(&mvmtxq->tx_request, 0);
1709 	}
1710 
1711 	mvm_sta->agg_tids = 0;
1712 
1713 	if (iwl_mvm_has_new_rx_api(mvm) &&
1714 	    !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1715 		int q;
1716 
1717 		dup_data = kcalloc(mvm->trans->num_rx_queues,
1718 				   sizeof(*dup_data), GFP_KERNEL);
1719 		if (!dup_data)
1720 			return -ENOMEM;
1721 		/*
1722 		 * Initialize all the last_seq values to 0xffff which can never
1723 		 * compare equal to the frame's seq_ctrl in the check in
1724 		 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1725 		 * number and fragmented packets don't reach that function.
1726 		 *
1727 		 * This thus allows receiving a packet with seqno 0 and the
1728 		 * retry bit set as the very first packet on a new TID.
1729 		 */
1730 		for (q = 0; q < mvm->trans->num_rx_queues; q++)
1731 			memset(dup_data[q].last_seq, 0xff,
1732 			       sizeof(dup_data[q].last_seq));
1733 		mvm_sta->dup_data = dup_data;
1734 	}
1735 
1736 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1737 		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1738 						 ieee80211_vif_type_p2p(vif));
1739 		if (ret)
1740 			goto err;
1741 	}
1742 
1743 	/*
1744 	 * if rs is registered with mac80211, then "add station" will be handled
1745 	 * via the corresponding ops, otherwise need to notify rate scaling here
1746 	 */
1747 	if (iwl_mvm_has_tlc_offload(mvm))
1748 		iwl_mvm_rs_add_sta(mvm, mvm_sta);
1749 	else
1750 		spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock);
1751 
1752 	iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1753 
1754 update_fw:
1755 	ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1756 	if (ret)
1757 		goto err;
1758 
1759 	if (vif->type == NL80211_IFTYPE_STATION) {
1760 		if (!sta->tdls) {
1761 			WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1762 			mvmvif->ap_sta_id = sta_id;
1763 		} else {
1764 			WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1765 		}
1766 	}
1767 
1768 	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1769 
1770 	return 0;
1771 
1772 err:
1773 	return ret;
1774 }
1775 
1776 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1777 		      bool drain)
1778 {
1779 	struct iwl_mvm_add_sta_cmd cmd = {};
1780 	int ret;
1781 	u32 status;
1782 
1783 	lockdep_assert_held(&mvm->mutex);
1784 
1785 	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1786 	cmd.sta_id = mvmsta->sta_id;
1787 	cmd.add_modify = STA_MODE_MODIFY;
1788 	cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1789 	cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1790 
1791 	status = ADD_STA_SUCCESS;
1792 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1793 					  iwl_mvm_add_sta_cmd_size(mvm),
1794 					  &cmd, &status);
1795 	if (ret)
1796 		return ret;
1797 
1798 	switch (status & IWL_ADD_STA_STATUS_MASK) {
1799 	case ADD_STA_SUCCESS:
1800 		IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1801 			       mvmsta->sta_id);
1802 		break;
1803 	default:
1804 		ret = -EIO;
1805 		IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1806 			mvmsta->sta_id);
1807 		break;
1808 	}
1809 
1810 	return ret;
1811 }
1812 
1813 /*
1814  * Remove a station from the FW table. Before sending the command to remove
1815  * the station validate that the station is indeed known to the driver (sanity
1816  * only).
1817  */
1818 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1819 {
1820 	struct ieee80211_sta *sta;
1821 	struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1822 		.sta_id = sta_id,
1823 	};
1824 	int ret;
1825 
1826 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1827 					lockdep_is_held(&mvm->mutex));
1828 
1829 	/* Note: internal stations are marked as error values */
1830 	if (!sta) {
1831 		IWL_ERR(mvm, "Invalid station id\n");
1832 		return -EINVAL;
1833 	}
1834 
1835 	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1836 				   sizeof(rm_sta_cmd), &rm_sta_cmd);
1837 	if (ret) {
1838 		IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1839 		return ret;
1840 	}
1841 
1842 	return 0;
1843 }
1844 
1845 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1846 				       struct ieee80211_vif *vif,
1847 				       struct ieee80211_sta *sta)
1848 {
1849 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1850 	int i;
1851 
1852 	lockdep_assert_held(&mvm->mutex);
1853 
1854 	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1855 		if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1856 			continue;
1857 
1858 		iwl_mvm_disable_txq(mvm, sta, mvm_sta->sta_id,
1859 				    &mvm_sta->tid_data[i].txq_id, i);
1860 		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1861 	}
1862 
1863 	for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1864 		struct iwl_mvm_txq *mvmtxq =
1865 			iwl_mvm_txq_from_mac80211(sta->txq[i]);
1866 
1867 		mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1868 		list_del_init(&mvmtxq->list);
1869 	}
1870 }
1871 
1872 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1873 				  struct iwl_mvm_sta *mvm_sta)
1874 {
1875 	int i;
1876 
1877 	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1878 		u16 txq_id;
1879 		int ret;
1880 
1881 		spin_lock_bh(&mvm_sta->lock);
1882 		txq_id = mvm_sta->tid_data[i].txq_id;
1883 		spin_unlock_bh(&mvm_sta->lock);
1884 
1885 		if (txq_id == IWL_MVM_INVALID_QUEUE)
1886 			continue;
1887 
1888 		ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1889 		if (ret)
1890 			return ret;
1891 	}
1892 
1893 	return 0;
1894 }
1895 
1896 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1897 		   struct ieee80211_vif *vif,
1898 		   struct ieee80211_sta *sta)
1899 {
1900 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1901 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1902 	u8 sta_id = mvm_sta->sta_id;
1903 	int ret;
1904 
1905 	lockdep_assert_held(&mvm->mutex);
1906 
1907 	if (iwl_mvm_has_new_rx_api(mvm))
1908 		kfree(mvm_sta->dup_data);
1909 
1910 	ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1911 	if (ret)
1912 		return ret;
1913 
1914 	/* flush its queues here since we are freeing mvm_sta */
1915 	ret = iwl_mvm_flush_sta(mvm, mvm_sta, false);
1916 	if (ret)
1917 		return ret;
1918 	if (iwl_mvm_has_new_tx_api(mvm)) {
1919 		ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1920 	} else {
1921 		u32 q_mask = mvm_sta->tfd_queue_msk;
1922 
1923 		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1924 						     q_mask);
1925 	}
1926 	if (ret)
1927 		return ret;
1928 
1929 	ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1930 
1931 	iwl_mvm_disable_sta_queues(mvm, vif, sta);
1932 
1933 	/* If there is a TXQ still marked as reserved - free it */
1934 	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1935 		u8 reserved_txq = mvm_sta->reserved_queue;
1936 		enum iwl_mvm_queue_status *status;
1937 
1938 		/*
1939 		 * If no traffic has gone through the reserved TXQ - it
1940 		 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1941 		 * should be manually marked as free again
1942 		 */
1943 		status = &mvm->queue_info[reserved_txq].status;
1944 		if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1945 			 (*status != IWL_MVM_QUEUE_FREE),
1946 			 "sta_id %d reserved txq %d status %d",
1947 			 sta_id, reserved_txq, *status))
1948 			return -EINVAL;
1949 
1950 		*status = IWL_MVM_QUEUE_FREE;
1951 	}
1952 
1953 	if (vif->type == NL80211_IFTYPE_STATION &&
1954 	    mvmvif->ap_sta_id == sta_id) {
1955 		/* if associated - we can't remove the AP STA now */
1956 		if (vif->cfg.assoc)
1957 			return ret;
1958 
1959 		/* first remove remaining keys */
1960 		iwl_mvm_sec_key_remove_ap(mvm, vif);
1961 
1962 		/* unassoc - go ahead - remove the AP STA now */
1963 		mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1964 	}
1965 
1966 	/*
1967 	 * This shouldn't happen - the TDLS channel switch should be canceled
1968 	 * before the STA is removed.
1969 	 */
1970 	if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1971 		mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1972 		cancel_delayed_work(&mvm->tdls_cs.dwork);
1973 	}
1974 
1975 	/*
1976 	 * Make sure that the tx response code sees the station as -EBUSY and
1977 	 * calls the drain worker.
1978 	 */
1979 	spin_lock_bh(&mvm_sta->lock);
1980 	spin_unlock_bh(&mvm_sta->lock);
1981 
1982 	ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1983 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1984 
1985 	return ret;
1986 }
1987 
1988 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1989 		      struct ieee80211_vif *vif,
1990 		      u8 sta_id)
1991 {
1992 	int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1993 
1994 	lockdep_assert_held(&mvm->mutex);
1995 
1996 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1997 	return ret;
1998 }
1999 
2000 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2001 			     struct iwl_mvm_int_sta *sta,
2002 			     u32 qmask, enum nl80211_iftype iftype,
2003 			     enum iwl_sta_type type)
2004 {
2005 	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2006 	    sta->sta_id == IWL_MVM_INVALID_STA) {
2007 		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2008 		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2009 			return -ENOSPC;
2010 	}
2011 
2012 	sta->tfd_queue_msk = qmask;
2013 	sta->type = type;
2014 
2015 	/* put a non-NULL value so iterating over the stations won't stop */
2016 	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2017 	return 0;
2018 }
2019 
2020 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2021 {
2022 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2023 	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2024 	sta->sta_id = IWL_MVM_INVALID_STA;
2025 }
2026 
2027 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2028 					  u8 sta_id, u8 fifo)
2029 {
2030 	unsigned int wdg_timeout =
2031 		mvm->trans->trans_cfg->base_params->wd_timeout;
2032 	struct iwl_trans_txq_scd_cfg cfg = {
2033 		.fifo = fifo,
2034 		.sta_id = sta_id,
2035 		.tid = IWL_MAX_TID_COUNT,
2036 		.aggregate = false,
2037 		.frame_limit = IWL_FRAME_LIMIT,
2038 	};
2039 
2040 	WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2041 
2042 	iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2043 }
2044 
2045 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2046 {
2047 	unsigned int wdg_timeout =
2048 		mvm->trans->trans_cfg->base_params->wd_timeout;
2049 
2050 	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2051 
2052 	return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT,
2053 				       wdg_timeout);
2054 }
2055 
2056 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2057 					  int maccolor, u8 *addr,
2058 					  struct iwl_mvm_int_sta *sta,
2059 					  u16 *queue, int fifo)
2060 {
2061 	int ret;
2062 
2063 	/* Map queue to fifo - needs to happen before adding station */
2064 	if (!iwl_mvm_has_new_tx_api(mvm))
2065 		iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2066 
2067 	ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2068 	if (ret) {
2069 		if (!iwl_mvm_has_new_tx_api(mvm))
2070 			iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2071 					    IWL_MAX_TID_COUNT);
2072 		return ret;
2073 	}
2074 
2075 	/*
2076 	 * For 22000 firmware and on we cannot add queue to a station unknown
2077 	 * to firmware so enable queue here - after the station was added
2078 	 */
2079 	if (iwl_mvm_has_new_tx_api(mvm)) {
2080 		int txq;
2081 
2082 		txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2083 		if (txq < 0) {
2084 			iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2085 			return txq;
2086 		}
2087 
2088 		*queue = txq;
2089 	}
2090 
2091 	return 0;
2092 }
2093 
2094 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2095 {
2096 	int ret;
2097 
2098 	lockdep_assert_held(&mvm->mutex);
2099 
2100 	/* Allocate aux station and assign to it the aux queue */
2101 	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2102 				       NL80211_IFTYPE_UNSPECIFIED,
2103 				       IWL_STA_AUX_ACTIVITY);
2104 	if (ret)
2105 		return ret;
2106 
2107 	/*
2108 	 * In CDB NICs we need to specify which lmac to use for aux activity
2109 	 * using the mac_id argument place to send lmac_id to the function
2110 	 */
2111 	ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2112 					     &mvm->aux_sta, &mvm->aux_queue,
2113 					     IWL_MVM_TX_FIFO_MCAST);
2114 	if (ret) {
2115 		iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2116 		return ret;
2117 	}
2118 
2119 	return 0;
2120 }
2121 
2122 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2123 {
2124 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2125 
2126 	lockdep_assert_held(&mvm->mutex);
2127 
2128 	return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2129 					      NULL, &mvm->snif_sta,
2130 					      &mvm->snif_queue,
2131 					      IWL_MVM_TX_FIFO_BE);
2132 }
2133 
2134 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2135 {
2136 	int ret;
2137 
2138 	lockdep_assert_held(&mvm->mutex);
2139 
2140 	if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2141 		return -EINVAL;
2142 
2143 	iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2144 			    &mvm->snif_queue, IWL_MAX_TID_COUNT);
2145 	ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2146 	if (ret)
2147 		IWL_WARN(mvm, "Failed sending remove station\n");
2148 
2149 	return ret;
2150 }
2151 
2152 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2153 {
2154 	int ret;
2155 
2156 	lockdep_assert_held(&mvm->mutex);
2157 
2158 	if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2159 		return -EINVAL;
2160 
2161 	iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2162 			    &mvm->aux_queue, IWL_MAX_TID_COUNT);
2163 	ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2164 	if (ret)
2165 		IWL_WARN(mvm, "Failed sending remove station\n");
2166 	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2167 
2168 	return ret;
2169 }
2170 
2171 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2172 {
2173 	iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2174 }
2175 
2176 /*
2177  * Send the add station command for the vif's broadcast station.
2178  * Assumes that the station was already allocated.
2179  *
2180  * @mvm: the mvm component
2181  * @vif: the interface to which the broadcast station is added
2182  * @bsta: the broadcast station to add.
2183  */
2184 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2185 {
2186 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2187 	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2188 	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2189 	const u8 *baddr = _baddr;
2190 	int queue;
2191 	int ret;
2192 	unsigned int wdg_timeout =
2193 		iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2194 	struct iwl_trans_txq_scd_cfg cfg = {
2195 		.fifo = IWL_MVM_TX_FIFO_VO,
2196 		.sta_id = mvmvif->bcast_sta.sta_id,
2197 		.tid = IWL_MAX_TID_COUNT,
2198 		.aggregate = false,
2199 		.frame_limit = IWL_FRAME_LIMIT,
2200 	};
2201 
2202 	lockdep_assert_held(&mvm->mutex);
2203 
2204 	if (!iwl_mvm_has_new_tx_api(mvm)) {
2205 		if (vif->type == NL80211_IFTYPE_AP ||
2206 		    vif->type == NL80211_IFTYPE_ADHOC) {
2207 			queue = mvm->probe_queue;
2208 		} else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2209 			queue = mvm->p2p_dev_queue;
2210 		} else {
2211 			WARN(1, "Missing required TXQ for adding bcast STA\n");
2212 			return -EINVAL;
2213 		}
2214 
2215 		bsta->tfd_queue_msk |= BIT(queue);
2216 
2217 		iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2218 	}
2219 
2220 	if (vif->type == NL80211_IFTYPE_ADHOC)
2221 		baddr = vif->bss_conf.bssid;
2222 
2223 	if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2224 		return -ENOSPC;
2225 
2226 	ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2227 					 mvmvif->id, mvmvif->color);
2228 	if (ret)
2229 		return ret;
2230 
2231 	/*
2232 	 * For 22000 firmware and on we cannot add queue to a station unknown
2233 	 * to firmware so enable queue here - after the station was added
2234 	 */
2235 	if (iwl_mvm_has_new_tx_api(mvm)) {
2236 		queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
2237 						IWL_MAX_TID_COUNT,
2238 						wdg_timeout);
2239 		if (queue < 0) {
2240 			iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2241 			return queue;
2242 		}
2243 
2244 		if (vif->type == NL80211_IFTYPE_AP ||
2245 		    vif->type == NL80211_IFTYPE_ADHOC)
2246 			mvm->probe_queue = queue;
2247 		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2248 			mvm->p2p_dev_queue = queue;
2249 	}
2250 
2251 	return 0;
2252 }
2253 
2254 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2255 					  struct ieee80211_vif *vif)
2256 {
2257 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2258 	u16 *queueptr, queue;
2259 
2260 	lockdep_assert_held(&mvm->mutex);
2261 
2262 	iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true);
2263 
2264 	switch (vif->type) {
2265 	case NL80211_IFTYPE_AP:
2266 	case NL80211_IFTYPE_ADHOC:
2267 		queueptr = &mvm->probe_queue;
2268 		break;
2269 	case NL80211_IFTYPE_P2P_DEVICE:
2270 		queueptr = &mvm->p2p_dev_queue;
2271 		break;
2272 	default:
2273 		WARN(1, "Can't free bcast queue on vif type %d\n",
2274 		     vif->type);
2275 		return;
2276 	}
2277 
2278 	queue = *queueptr;
2279 	iwl_mvm_disable_txq(mvm, NULL, mvmvif->bcast_sta.sta_id,
2280 			    queueptr, IWL_MAX_TID_COUNT);
2281 	if (iwl_mvm_has_new_tx_api(mvm))
2282 		return;
2283 
2284 	WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2285 	mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2286 }
2287 
2288 /* Send the FW a request to remove the station from it's internal data
2289  * structures, but DO NOT remove the entry from the local data structures. */
2290 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2291 {
2292 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2293 	int ret;
2294 
2295 	lockdep_assert_held(&mvm->mutex);
2296 
2297 	iwl_mvm_free_bcast_sta_queues(mvm, vif);
2298 
2299 	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2300 	if (ret)
2301 		IWL_WARN(mvm, "Failed sending remove station\n");
2302 	return ret;
2303 }
2304 
2305 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2306 {
2307 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2308 
2309 	lockdep_assert_held(&mvm->mutex);
2310 
2311 	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2312 					ieee80211_vif_type_p2p(vif),
2313 					IWL_STA_GENERAL_PURPOSE);
2314 }
2315 
2316 /* Allocate a new station entry for the broadcast station to the given vif,
2317  * and send it to the FW.
2318  * Note that each P2P mac should have its own broadcast station.
2319  *
2320  * @mvm: the mvm component
2321  * @vif: the interface to which the broadcast station is added
2322  * @bsta: the broadcast station to add. */
2323 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2324 {
2325 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2326 	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2327 	int ret;
2328 
2329 	lockdep_assert_held(&mvm->mutex);
2330 
2331 	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2332 	if (ret)
2333 		return ret;
2334 
2335 	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2336 
2337 	if (ret)
2338 		iwl_mvm_dealloc_int_sta(mvm, bsta);
2339 
2340 	return ret;
2341 }
2342 
2343 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2344 {
2345 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2346 
2347 	iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2348 }
2349 
2350 /*
2351  * Send the FW a request to remove the station from it's internal data
2352  * structures, and in addition remove it from the local data structure.
2353  */
2354 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2355 {
2356 	int ret;
2357 
2358 	lockdep_assert_held(&mvm->mutex);
2359 
2360 	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2361 
2362 	iwl_mvm_dealloc_bcast_sta(mvm, vif);
2363 
2364 	return ret;
2365 }
2366 
2367 /*
2368  * Allocate a new station entry for the multicast station to the given vif,
2369  * and send it to the FW.
2370  * Note that each AP/GO mac should have its own multicast station.
2371  *
2372  * @mvm: the mvm component
2373  * @vif: the interface to which the multicast station is added
2374  */
2375 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2376 {
2377 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2378 	struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2379 	static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2380 	const u8 *maddr = _maddr;
2381 	struct iwl_trans_txq_scd_cfg cfg = {
2382 		.fifo = vif->type == NL80211_IFTYPE_AP ?
2383 			IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2384 		.sta_id = msta->sta_id,
2385 		.tid = 0,
2386 		.aggregate = false,
2387 		.frame_limit = IWL_FRAME_LIMIT,
2388 	};
2389 	unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2390 	int ret;
2391 
2392 	lockdep_assert_held(&mvm->mutex);
2393 
2394 	if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2395 		    vif->type != NL80211_IFTYPE_ADHOC))
2396 		return -ENOTSUPP;
2397 
2398 	/*
2399 	 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2400 	 * invalid, so make sure we use the queue we want.
2401 	 * Note that this is done here as we want to avoid making DQA
2402 	 * changes in mac80211 layer.
2403 	 */
2404 	if (vif->type == NL80211_IFTYPE_ADHOC)
2405 		mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2406 
2407 	/*
2408 	 * While in previous FWs we had to exclude cab queue from TFD queue
2409 	 * mask, now it is needed as any other queue.
2410 	 */
2411 	if (!iwl_mvm_has_new_tx_api(mvm) &&
2412 	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2413 		iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2414 				   timeout);
2415 		msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
2416 	}
2417 	ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2418 					 mvmvif->id, mvmvif->color);
2419 	if (ret)
2420 		goto err;
2421 
2422 	/*
2423 	 * Enable cab queue after the ADD_STA command is sent.
2424 	 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2425 	 * command with unknown station id, and for FW that doesn't support
2426 	 * station API since the cab queue is not included in the
2427 	 * tfd_queue_mask.
2428 	 */
2429 	if (iwl_mvm_has_new_tx_api(mvm)) {
2430 		int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
2431 						    0,
2432 						    timeout);
2433 		if (queue < 0) {
2434 			ret = queue;
2435 			goto err;
2436 		}
2437 		mvmvif->cab_queue = queue;
2438 	} else if (!fw_has_api(&mvm->fw->ucode_capa,
2439 			       IWL_UCODE_TLV_API_STA_TYPE))
2440 		iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2441 				   timeout);
2442 
2443 	return 0;
2444 err:
2445 	iwl_mvm_dealloc_int_sta(mvm, msta);
2446 	return ret;
2447 }
2448 
2449 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2450 				    struct ieee80211_key_conf *keyconf,
2451 				    bool mcast)
2452 {
2453 	union {
2454 		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2455 		struct iwl_mvm_add_sta_key_cmd cmd;
2456 	} u = {};
2457 	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2458 				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2459 	__le16 key_flags;
2460 	int ret, size;
2461 	u32 status;
2462 
2463 	/* This is a valid situation for GTK removal */
2464 	if (sta_id == IWL_MVM_INVALID_STA)
2465 		return 0;
2466 
2467 	key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2468 				 STA_KEY_FLG_KEYID_MSK);
2469 	key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2470 	key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2471 
2472 	if (mcast)
2473 		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2474 
2475 	/*
2476 	 * The fields assigned here are in the same location at the start
2477 	 * of the command, so we can do this union trick.
2478 	 */
2479 	u.cmd.common.key_flags = key_flags;
2480 	u.cmd.common.key_offset = keyconf->hw_key_idx;
2481 	u.cmd.common.sta_id = sta_id;
2482 
2483 	size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2484 
2485 	status = ADD_STA_SUCCESS;
2486 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2487 					  &status);
2488 
2489 	switch (status) {
2490 	case ADD_STA_SUCCESS:
2491 		IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2492 		break;
2493 	default:
2494 		ret = -EIO;
2495 		IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2496 		break;
2497 	}
2498 
2499 	return ret;
2500 }
2501 
2502 /*
2503  * Send the FW a request to remove the station from it's internal data
2504  * structures, and in addition remove it from the local data structure.
2505  */
2506 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2507 {
2508 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2509 	int ret;
2510 
2511 	lockdep_assert_held(&mvm->mutex);
2512 
2513 	iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true);
2514 
2515 	iwl_mvm_disable_txq(mvm, NULL, mvmvif->mcast_sta.sta_id,
2516 			    &mvmvif->cab_queue, 0);
2517 
2518 	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2519 	if (ret)
2520 		IWL_WARN(mvm, "Failed sending remove station\n");
2521 
2522 	return ret;
2523 }
2524 
2525 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2526 {
2527 	struct iwl_mvm_delba_data notif = {
2528 		.baid = baid,
2529 	};
2530 
2531 	iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2532 					&notif, sizeof(notif));
2533 };
2534 
2535 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2536 				 struct iwl_mvm_baid_data *data)
2537 {
2538 	int i;
2539 
2540 	iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2541 
2542 	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2543 		int j;
2544 		struct iwl_mvm_reorder_buffer *reorder_buf =
2545 			&data->reorder_buf[i];
2546 		struct iwl_mvm_reorder_buf_entry *entries =
2547 			&data->entries[i * data->entries_per_queue];
2548 
2549 		spin_lock_bh(&reorder_buf->lock);
2550 		if (likely(!reorder_buf->num_stored)) {
2551 			spin_unlock_bh(&reorder_buf->lock);
2552 			continue;
2553 		}
2554 
2555 		/*
2556 		 * This shouldn't happen in regular DELBA since the internal
2557 		 * delBA notification should trigger a release of all frames in
2558 		 * the reorder buffer.
2559 		 */
2560 		WARN_ON(1);
2561 
2562 		for (j = 0; j < reorder_buf->buf_size; j++)
2563 			__skb_queue_purge(&entries[j].e.frames);
2564 		/*
2565 		 * Prevent timer re-arm. This prevents a very far fetched case
2566 		 * where we timed out on the notification. There may be prior
2567 		 * RX frames pending in the RX queue before the notification
2568 		 * that might get processed between now and the actual deletion
2569 		 * and we would re-arm the timer although we are deleting the
2570 		 * reorder buffer.
2571 		 */
2572 		reorder_buf->removed = true;
2573 		spin_unlock_bh(&reorder_buf->lock);
2574 		del_timer_sync(&reorder_buf->reorder_timer);
2575 	}
2576 }
2577 
2578 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2579 					struct iwl_mvm_baid_data *data,
2580 					u16 ssn, u16 buf_size)
2581 {
2582 	int i;
2583 
2584 	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2585 		struct iwl_mvm_reorder_buffer *reorder_buf =
2586 			&data->reorder_buf[i];
2587 		struct iwl_mvm_reorder_buf_entry *entries =
2588 			&data->entries[i * data->entries_per_queue];
2589 		int j;
2590 
2591 		reorder_buf->num_stored = 0;
2592 		reorder_buf->head_sn = ssn;
2593 		reorder_buf->buf_size = buf_size;
2594 		/* rx reorder timer */
2595 		timer_setup(&reorder_buf->reorder_timer,
2596 			    iwl_mvm_reorder_timer_expired, 0);
2597 		spin_lock_init(&reorder_buf->lock);
2598 		reorder_buf->mvm = mvm;
2599 		reorder_buf->queue = i;
2600 		reorder_buf->valid = false;
2601 		for (j = 0; j < reorder_buf->buf_size; j++)
2602 			__skb_queue_head_init(&entries[j].e.frames);
2603 	}
2604 }
2605 
2606 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2607 				  struct iwl_mvm_sta *mvm_sta,
2608 				  bool start, int tid, u16 ssn,
2609 				  u16 buf_size)
2610 {
2611 	struct iwl_mvm_add_sta_cmd cmd = {
2612 		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2613 		.sta_id = mvm_sta->sta_id,
2614 		.add_modify = STA_MODE_MODIFY,
2615 	};
2616 	u32 status;
2617 	int ret;
2618 
2619 	if (start) {
2620 		cmd.add_immediate_ba_tid = tid;
2621 		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2622 		cmd.rx_ba_window = cpu_to_le16(buf_size);
2623 		cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2624 	} else {
2625 		cmd.remove_immediate_ba_tid = tid;
2626 		cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2627 	}
2628 
2629 	status = ADD_STA_SUCCESS;
2630 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2631 					  iwl_mvm_add_sta_cmd_size(mvm),
2632 					  &cmd, &status);
2633 	if (ret)
2634 		return ret;
2635 
2636 	switch (status & IWL_ADD_STA_STATUS_MASK) {
2637 	case ADD_STA_SUCCESS:
2638 		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2639 			     start ? "start" : "stopp");
2640 		if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2641 			    !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2642 			return -EINVAL;
2643 		return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2644 	case ADD_STA_IMMEDIATE_BA_FAILURE:
2645 		IWL_WARN(mvm, "RX BA Session refused by fw\n");
2646 		return -ENOSPC;
2647 	default:
2648 		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2649 			start ? "start" : "stopp", status);
2650 		return -EIO;
2651 	}
2652 }
2653 
2654 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2655 				  struct iwl_mvm_sta *mvm_sta,
2656 				  bool start, int tid, u16 ssn,
2657 				  u16 buf_size, int baid)
2658 {
2659 	struct iwl_rx_baid_cfg_cmd cmd = {
2660 		.action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2661 				  cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2662 	};
2663 	u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD);
2664 	int ret;
2665 
2666 	BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2667 
2668 	if (start) {
2669 		cmd.alloc.sta_id_mask = cpu_to_le32(BIT(mvm_sta->sta_id));
2670 		cmd.alloc.tid = tid;
2671 		cmd.alloc.ssn = cpu_to_le16(ssn);
2672 		cmd.alloc.win_size = cpu_to_le16(buf_size);
2673 		baid = -EIO;
2674 	} else if (iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 1) == 1) {
2675 		cmd.remove_v1.baid = cpu_to_le32(baid);
2676 		BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2677 	} else {
2678 		cmd.remove.sta_id_mask = cpu_to_le32(BIT(mvm_sta->sta_id));
2679 		cmd.remove.tid = cpu_to_le32(tid);
2680 	}
2681 
2682 	ret = iwl_mvm_send_cmd_pdu_status(mvm, cmd_id, sizeof(cmd),
2683 					  &cmd, &baid);
2684 	if (ret)
2685 		return ret;
2686 
2687 	if (!start) {
2688 		/* ignore firmware baid on remove */
2689 		baid = 0;
2690 	}
2691 
2692 	IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2693 		     start ? "start" : "stopp");
2694 
2695 	if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2696 		return -EINVAL;
2697 
2698 	return baid;
2699 }
2700 
2701 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvm_sta,
2702 			      bool start, int tid, u16 ssn, u16 buf_size,
2703 			      int baid)
2704 {
2705 	if (fw_has_capa(&mvm->fw->ucode_capa,
2706 			IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2707 		return iwl_mvm_fw_baid_op_cmd(mvm, mvm_sta, start,
2708 					      tid, ssn, buf_size, baid);
2709 
2710 	return iwl_mvm_fw_baid_op_sta(mvm, mvm_sta, start,
2711 				      tid, ssn, buf_size);
2712 }
2713 
2714 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2715 		       int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2716 {
2717 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2718 	struct iwl_mvm_baid_data *baid_data = NULL;
2719 	int ret, baid;
2720 	u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2721 							       IWL_MAX_BAID_OLD;
2722 
2723 	lockdep_assert_held(&mvm->mutex);
2724 
2725 	if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2726 		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2727 		return -ENOSPC;
2728 	}
2729 
2730 	if (iwl_mvm_has_new_rx_api(mvm) && start) {
2731 		u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2732 
2733 		/* sparse doesn't like the __align() so don't check */
2734 #ifndef __CHECKER__
2735 		/*
2736 		 * The division below will be OK if either the cache line size
2737 		 * can be divided by the entry size (ALIGN will round up) or if
2738 		 * if the entry size can be divided by the cache line size, in
2739 		 * which case the ALIGN() will do nothing.
2740 		 */
2741 		BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2742 			     sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2743 #endif
2744 
2745 		/*
2746 		 * Upward align the reorder buffer size to fill an entire cache
2747 		 * line for each queue, to avoid sharing cache lines between
2748 		 * different queues.
2749 		 */
2750 		reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2751 
2752 		/*
2753 		 * Allocate here so if allocation fails we can bail out early
2754 		 * before starting the BA session in the firmware
2755 		 */
2756 		baid_data = kzalloc(sizeof(*baid_data) +
2757 				    mvm->trans->num_rx_queues *
2758 				    reorder_buf_size,
2759 				    GFP_KERNEL);
2760 		if (!baid_data)
2761 			return -ENOMEM;
2762 
2763 		/*
2764 		 * This division is why we need the above BUILD_BUG_ON(),
2765 		 * if that doesn't hold then this will not be right.
2766 		 */
2767 		baid_data->entries_per_queue =
2768 			reorder_buf_size / sizeof(baid_data->entries[0]);
2769 	}
2770 
2771 	if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2772 		baid = mvm_sta->tid_to_baid[tid];
2773 	} else {
2774 		/* we don't really need it in this case */
2775 		baid = -1;
2776 	}
2777 
2778 	/* Don't send command to remove (start=0) BAID during restart */
2779 	if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2780 		baid = iwl_mvm_fw_baid_op(mvm, mvm_sta, start, tid, ssn, buf_size,
2781 					  baid);
2782 
2783 	if (baid < 0) {
2784 		ret = baid;
2785 		goto out_free;
2786 	}
2787 
2788 	if (start) {
2789 		mvm->rx_ba_sessions++;
2790 
2791 		if (!iwl_mvm_has_new_rx_api(mvm))
2792 			return 0;
2793 
2794 		baid_data->baid = baid;
2795 		baid_data->timeout = timeout;
2796 		baid_data->last_rx = jiffies;
2797 		baid_data->rcu_ptr = &mvm->baid_map[baid];
2798 		timer_setup(&baid_data->session_timer,
2799 			    iwl_mvm_rx_agg_session_expired, 0);
2800 		baid_data->mvm = mvm;
2801 		baid_data->tid = tid;
2802 		baid_data->sta_id = mvm_sta->sta_id;
2803 
2804 		mvm_sta->tid_to_baid[tid] = baid;
2805 		if (timeout)
2806 			mod_timer(&baid_data->session_timer,
2807 				  TU_TO_EXP_TIME(timeout * 2));
2808 
2809 		iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2810 		/*
2811 		 * protect the BA data with RCU to cover a case where our
2812 		 * internal RX sync mechanism will timeout (not that it's
2813 		 * supposed to happen) and we will free the session data while
2814 		 * RX is being processed in parallel
2815 		 */
2816 		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2817 			     mvm_sta->sta_id, tid, baid);
2818 		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2819 		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2820 	} else  {
2821 		baid = mvm_sta->tid_to_baid[tid];
2822 
2823 		if (mvm->rx_ba_sessions > 0)
2824 			/* check that restart flow didn't zero the counter */
2825 			mvm->rx_ba_sessions--;
2826 		if (!iwl_mvm_has_new_rx_api(mvm))
2827 			return 0;
2828 
2829 		if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2830 			return -EINVAL;
2831 
2832 		baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2833 		if (WARN_ON(!baid_data))
2834 			return -EINVAL;
2835 
2836 		/* synchronize all rx queues so we can safely delete */
2837 		iwl_mvm_free_reorder(mvm, baid_data);
2838 		timer_shutdown_sync(&baid_data->session_timer);
2839 		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2840 		kfree_rcu(baid_data, rcu_head);
2841 		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2842 
2843 		/*
2844 		 * After we've deleted it, do another queue sync
2845 		 * so if an IWL_MVM_RXQ_NSSN_SYNC was concurrently
2846 		 * running it won't find a new session in the old
2847 		 * BAID. It can find the NULL pointer for the BAID,
2848 		 * but we must not have it find a different session.
2849 		 */
2850 		iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_EMPTY,
2851 						true, NULL, 0);
2852 	}
2853 	return 0;
2854 
2855 out_free:
2856 	kfree(baid_data);
2857 	return ret;
2858 }
2859 
2860 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2861 		       int tid, u8 queue, bool start)
2862 {
2863 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2864 	struct iwl_mvm_add_sta_cmd cmd = {};
2865 	int ret;
2866 	u32 status;
2867 
2868 	lockdep_assert_held(&mvm->mutex);
2869 
2870 	if (start) {
2871 		mvm_sta->tfd_queue_msk |= BIT(queue);
2872 		mvm_sta->tid_disable_agg &= ~BIT(tid);
2873 	} else {
2874 		/* In DQA-mode the queue isn't removed on agg termination */
2875 		mvm_sta->tid_disable_agg |= BIT(tid);
2876 	}
2877 
2878 	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2879 	cmd.sta_id = mvm_sta->sta_id;
2880 	cmd.add_modify = STA_MODE_MODIFY;
2881 	if (!iwl_mvm_has_new_tx_api(mvm))
2882 		cmd.modify_mask = STA_MODIFY_QUEUES;
2883 	cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2884 	cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2885 	cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2886 
2887 	status = ADD_STA_SUCCESS;
2888 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2889 					  iwl_mvm_add_sta_cmd_size(mvm),
2890 					  &cmd, &status);
2891 	if (ret)
2892 		return ret;
2893 
2894 	switch (status & IWL_ADD_STA_STATUS_MASK) {
2895 	case ADD_STA_SUCCESS:
2896 		break;
2897 	default:
2898 		ret = -EIO;
2899 		IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2900 			start ? "start" : "stopp", status);
2901 		break;
2902 	}
2903 
2904 	return ret;
2905 }
2906 
2907 const u8 tid_to_mac80211_ac[] = {
2908 	IEEE80211_AC_BE,
2909 	IEEE80211_AC_BK,
2910 	IEEE80211_AC_BK,
2911 	IEEE80211_AC_BE,
2912 	IEEE80211_AC_VI,
2913 	IEEE80211_AC_VI,
2914 	IEEE80211_AC_VO,
2915 	IEEE80211_AC_VO,
2916 	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2917 };
2918 
2919 static const u8 tid_to_ucode_ac[] = {
2920 	AC_BE,
2921 	AC_BK,
2922 	AC_BK,
2923 	AC_BE,
2924 	AC_VI,
2925 	AC_VI,
2926 	AC_VO,
2927 	AC_VO,
2928 };
2929 
2930 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2931 			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2932 {
2933 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2934 	struct iwl_mvm_tid_data *tid_data;
2935 	u16 normalized_ssn;
2936 	u16 txq_id;
2937 	int ret;
2938 
2939 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2940 		return -EINVAL;
2941 
2942 	if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2943 	    mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2944 		IWL_ERR(mvm,
2945 			"Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2946 			mvmsta->tid_data[tid].state);
2947 		return -ENXIO;
2948 	}
2949 
2950 	lockdep_assert_held(&mvm->mutex);
2951 
2952 	if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2953 	    iwl_mvm_has_new_tx_api(mvm)) {
2954 		u8 ac = tid_to_mac80211_ac[tid];
2955 
2956 		ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2957 		if (ret)
2958 			return ret;
2959 	}
2960 
2961 	spin_lock_bh(&mvmsta->lock);
2962 
2963 	/*
2964 	 * Note the possible cases:
2965 	 *  1. An enabled TXQ - TXQ needs to become agg'ed
2966 	 *  2. The TXQ hasn't yet been enabled, so find a free one and mark
2967 	 *	it as reserved
2968 	 */
2969 	txq_id = mvmsta->tid_data[tid].txq_id;
2970 	if (txq_id == IWL_MVM_INVALID_QUEUE) {
2971 		ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2972 					      IWL_MVM_DQA_MIN_DATA_QUEUE,
2973 					      IWL_MVM_DQA_MAX_DATA_QUEUE);
2974 		if (ret < 0) {
2975 			IWL_ERR(mvm, "Failed to allocate agg queue\n");
2976 			goto out;
2977 		}
2978 
2979 		txq_id = ret;
2980 
2981 		/* TXQ hasn't yet been enabled, so mark it only as reserved */
2982 		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2983 	} else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2984 		ret = -ENXIO;
2985 		IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2986 			tid, IWL_MAX_HW_QUEUES - 1);
2987 		goto out;
2988 
2989 	} else if (unlikely(mvm->queue_info[txq_id].status ==
2990 			    IWL_MVM_QUEUE_SHARED)) {
2991 		ret = -ENXIO;
2992 		IWL_DEBUG_TX_QUEUES(mvm,
2993 				    "Can't start tid %d agg on shared queue!\n",
2994 				    tid);
2995 		goto out;
2996 	}
2997 
2998 	IWL_DEBUG_TX_QUEUES(mvm,
2999 			    "AGG for tid %d will be on queue #%d\n",
3000 			    tid, txq_id);
3001 
3002 	tid_data = &mvmsta->tid_data[tid];
3003 	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3004 	tid_data->txq_id = txq_id;
3005 	*ssn = tid_data->ssn;
3006 
3007 	IWL_DEBUG_TX_QUEUES(mvm,
3008 			    "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3009 			    mvmsta->sta_id, tid, txq_id, tid_data->ssn,
3010 			    tid_data->next_reclaimed);
3011 
3012 	/*
3013 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3014 	 * to align the wrap around of ssn so we compare relevant values.
3015 	 */
3016 	normalized_ssn = tid_data->ssn;
3017 	if (mvm->trans->trans_cfg->gen2)
3018 		normalized_ssn &= 0xff;
3019 
3020 	if (normalized_ssn == tid_data->next_reclaimed) {
3021 		tid_data->state = IWL_AGG_STARTING;
3022 		ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3023 	} else {
3024 		tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3025 		ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3026 	}
3027 
3028 out:
3029 	spin_unlock_bh(&mvmsta->lock);
3030 
3031 	return ret;
3032 }
3033 
3034 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3035 			    struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3036 			    bool amsdu)
3037 {
3038 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3039 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3040 	unsigned int wdg_timeout =
3041 		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
3042 	int queue, ret;
3043 	bool alloc_queue = true;
3044 	enum iwl_mvm_queue_status queue_status;
3045 	u16 ssn;
3046 
3047 	struct iwl_trans_txq_scd_cfg cfg = {
3048 		.sta_id = mvmsta->sta_id,
3049 		.tid = tid,
3050 		.frame_limit = buf_size,
3051 		.aggregate = true,
3052 	};
3053 
3054 	/*
3055 	 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3056 	 * manager, so this function should never be called in this case.
3057 	 */
3058 	if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3059 		return -EINVAL;
3060 
3061 	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3062 		     != IWL_MAX_TID_COUNT);
3063 
3064 	spin_lock_bh(&mvmsta->lock);
3065 	ssn = tid_data->ssn;
3066 	queue = tid_data->txq_id;
3067 	tid_data->state = IWL_AGG_ON;
3068 	mvmsta->agg_tids |= BIT(tid);
3069 	tid_data->ssn = 0xffff;
3070 	tid_data->amsdu_in_ampdu_allowed = amsdu;
3071 	spin_unlock_bh(&mvmsta->lock);
3072 
3073 	if (iwl_mvm_has_new_tx_api(mvm)) {
3074 		/*
3075 		 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3076 		 * would have failed, so if we are here there is no need to
3077 		 * allocate a queue.
3078 		 * However, if aggregation size is different than the default
3079 		 * size, the scheduler should be reconfigured.
3080 		 * We cannot do this with the new TX API, so return unsupported
3081 		 * for now, until it will be offloaded to firmware..
3082 		 * Note that if SCD default value changes - this condition
3083 		 * should be updated as well.
3084 		 */
3085 		if (buf_size < IWL_FRAME_LIMIT)
3086 			return -ENOTSUPP;
3087 
3088 		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3089 		if (ret)
3090 			return -EIO;
3091 		goto out;
3092 	}
3093 
3094 	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3095 
3096 	queue_status = mvm->queue_info[queue].status;
3097 
3098 	/* Maybe there is no need to even alloc a queue... */
3099 	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3100 		alloc_queue = false;
3101 
3102 	/*
3103 	 * Only reconfig the SCD for the queue if the window size has
3104 	 * changed from current (become smaller)
3105 	 */
3106 	if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3107 		/*
3108 		 * If reconfiguring an existing queue, it first must be
3109 		 * drained
3110 		 */
3111 		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3112 						     BIT(queue));
3113 		if (ret) {
3114 			IWL_ERR(mvm,
3115 				"Error draining queue before reconfig\n");
3116 			return ret;
3117 		}
3118 
3119 		ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3120 					   mvmsta->sta_id, tid,
3121 					   buf_size, ssn);
3122 		if (ret) {
3123 			IWL_ERR(mvm,
3124 				"Error reconfiguring TXQ #%d\n", queue);
3125 			return ret;
3126 		}
3127 	}
3128 
3129 	if (alloc_queue)
3130 		iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3131 				   &cfg, wdg_timeout);
3132 
3133 	/* Send ADD_STA command to enable aggs only if the queue isn't shared */
3134 	if (queue_status != IWL_MVM_QUEUE_SHARED) {
3135 		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3136 		if (ret)
3137 			return -EIO;
3138 	}
3139 
3140 	/* No need to mark as reserved */
3141 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3142 
3143 out:
3144 	/*
3145 	 * Even though in theory the peer could have different
3146 	 * aggregation reorder buffer sizes for different sessions,
3147 	 * our ucode doesn't allow for that and has a global limit
3148 	 * for each station. Therefore, use the minimum of all the
3149 	 * aggregation sessions and our default value.
3150 	 */
3151 	mvmsta->max_agg_bufsize =
3152 		min(mvmsta->max_agg_bufsize, buf_size);
3153 	mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3154 
3155 	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3156 		     sta->addr, tid);
3157 
3158 	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq);
3159 }
3160 
3161 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3162 					struct iwl_mvm_sta *mvmsta,
3163 					struct iwl_mvm_tid_data *tid_data)
3164 {
3165 	u16 txq_id = tid_data->txq_id;
3166 
3167 	lockdep_assert_held(&mvm->mutex);
3168 
3169 	if (iwl_mvm_has_new_tx_api(mvm))
3170 		return;
3171 
3172 	/*
3173 	 * The TXQ is marked as reserved only if no traffic came through yet
3174 	 * This means no traffic has been sent on this TID (agg'd or not), so
3175 	 * we no longer have use for the queue. Since it hasn't even been
3176 	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3177 	 * free.
3178 	 */
3179 	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3180 		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3181 		tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3182 	}
3183 }
3184 
3185 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3186 			    struct ieee80211_sta *sta, u16 tid)
3187 {
3188 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3189 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3190 	u16 txq_id;
3191 	int err;
3192 
3193 	/*
3194 	 * If mac80211 is cleaning its state, then say that we finished since
3195 	 * our state has been cleared anyway.
3196 	 */
3197 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3198 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3199 		return 0;
3200 	}
3201 
3202 	spin_lock_bh(&mvmsta->lock);
3203 
3204 	txq_id = tid_data->txq_id;
3205 
3206 	IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3207 			    mvmsta->sta_id, tid, txq_id, tid_data->state);
3208 
3209 	mvmsta->agg_tids &= ~BIT(tid);
3210 
3211 	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3212 
3213 	switch (tid_data->state) {
3214 	case IWL_AGG_ON:
3215 		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3216 
3217 		IWL_DEBUG_TX_QUEUES(mvm,
3218 				    "ssn = %d, next_recl = %d\n",
3219 				    tid_data->ssn, tid_data->next_reclaimed);
3220 
3221 		tid_data->ssn = 0xffff;
3222 		tid_data->state = IWL_AGG_OFF;
3223 		spin_unlock_bh(&mvmsta->lock);
3224 
3225 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3226 
3227 		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3228 		return 0;
3229 	case IWL_AGG_STARTING:
3230 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
3231 		/*
3232 		 * The agg session has been stopped before it was set up. This
3233 		 * can happen when the AddBA timer times out for example.
3234 		 */
3235 
3236 		/* No barriers since we are under mutex */
3237 		lockdep_assert_held(&mvm->mutex);
3238 
3239 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3240 		tid_data->state = IWL_AGG_OFF;
3241 		err = 0;
3242 		break;
3243 	default:
3244 		IWL_ERR(mvm,
3245 			"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3246 			mvmsta->sta_id, tid, tid_data->state);
3247 		IWL_ERR(mvm,
3248 			"\ttid_data->txq_id = %d\n", tid_data->txq_id);
3249 		err = -EINVAL;
3250 	}
3251 
3252 	spin_unlock_bh(&mvmsta->lock);
3253 
3254 	return err;
3255 }
3256 
3257 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3258 			    struct ieee80211_sta *sta, u16 tid)
3259 {
3260 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3261 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3262 	u16 txq_id;
3263 	enum iwl_mvm_agg_state old_state;
3264 
3265 	/*
3266 	 * First set the agg state to OFF to avoid calling
3267 	 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3268 	 */
3269 	spin_lock_bh(&mvmsta->lock);
3270 	txq_id = tid_data->txq_id;
3271 	IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3272 			    mvmsta->sta_id, tid, txq_id, tid_data->state);
3273 	old_state = tid_data->state;
3274 	tid_data->state = IWL_AGG_OFF;
3275 	mvmsta->agg_tids &= ~BIT(tid);
3276 	spin_unlock_bh(&mvmsta->lock);
3277 
3278 	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3279 
3280 	if (old_state >= IWL_AGG_ON) {
3281 		iwl_mvm_drain_sta(mvm, mvmsta, true);
3282 
3283 		if (iwl_mvm_has_new_tx_api(mvm)) {
3284 			if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3285 						   BIT(tid)))
3286 				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3287 			iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3288 		} else {
3289 			if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3290 				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3291 			iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3292 		}
3293 
3294 		iwl_mvm_drain_sta(mvm, mvmsta, false);
3295 
3296 		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3297 	}
3298 
3299 	return 0;
3300 }
3301 
3302 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3303 {
3304 	int i, max = -1, max_offs = -1;
3305 
3306 	lockdep_assert_held(&mvm->mutex);
3307 
3308 	/* Pick the unused key offset with the highest 'deleted'
3309 	 * counter. Every time a key is deleted, all the counters
3310 	 * are incremented and the one that was just deleted is
3311 	 * reset to zero. Thus, the highest counter is the one
3312 	 * that was deleted longest ago. Pick that one.
3313 	 */
3314 	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3315 		if (test_bit(i, mvm->fw_key_table))
3316 			continue;
3317 		if (mvm->fw_key_deleted[i] > max) {
3318 			max = mvm->fw_key_deleted[i];
3319 			max_offs = i;
3320 		}
3321 	}
3322 
3323 	if (max_offs < 0)
3324 		return STA_KEY_IDX_INVALID;
3325 
3326 	return max_offs;
3327 }
3328 
3329 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3330 					       struct ieee80211_vif *vif,
3331 					       struct ieee80211_sta *sta)
3332 {
3333 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3334 
3335 	if (sta)
3336 		return iwl_mvm_sta_from_mac80211(sta);
3337 
3338 	/*
3339 	 * The device expects GTKs for station interfaces to be
3340 	 * installed as GTKs for the AP station. If we have no
3341 	 * station ID, then use AP's station ID.
3342 	 */
3343 	if (vif->type == NL80211_IFTYPE_STATION &&
3344 	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3345 		u8 sta_id = mvmvif->ap_sta_id;
3346 
3347 		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3348 					    lockdep_is_held(&mvm->mutex));
3349 
3350 		/*
3351 		 * It is possible that the 'sta' parameter is NULL,
3352 		 * for example when a GTK is removed - the sta_id will then
3353 		 * be the AP ID, and no station was passed by mac80211.
3354 		 */
3355 		if (IS_ERR_OR_NULL(sta))
3356 			return NULL;
3357 
3358 		return iwl_mvm_sta_from_mac80211(sta);
3359 	}
3360 
3361 	return NULL;
3362 }
3363 
3364 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3365 {
3366 	int i;
3367 
3368 	for (i = len - 1; i >= 0; i--) {
3369 		if (pn1[i] > pn2[i])
3370 			return 1;
3371 		if (pn1[i] < pn2[i])
3372 			return -1;
3373 	}
3374 
3375 	return 0;
3376 }
3377 
3378 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3379 				u32 sta_id,
3380 				struct ieee80211_key_conf *key, bool mcast,
3381 				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3382 				u8 key_offset, bool mfp)
3383 {
3384 	union {
3385 		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3386 		struct iwl_mvm_add_sta_key_cmd cmd;
3387 	} u = {};
3388 	__le16 key_flags;
3389 	int ret;
3390 	u32 status;
3391 	u16 keyidx;
3392 	u64 pn = 0;
3393 	int i, size;
3394 	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3395 				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3396 	int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3397 					    new_api ? 2 : 1);
3398 
3399 	if (sta_id == IWL_MVM_INVALID_STA)
3400 		return -EINVAL;
3401 
3402 	keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3403 		 STA_KEY_FLG_KEYID_MSK;
3404 	key_flags = cpu_to_le16(keyidx);
3405 	key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3406 
3407 	switch (key->cipher) {
3408 	case WLAN_CIPHER_SUITE_TKIP:
3409 		key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3410 		if (api_ver >= 2) {
3411 			memcpy((void *)&u.cmd.tx_mic_key,
3412 			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3413 			       IWL_MIC_KEY_SIZE);
3414 
3415 			memcpy((void *)&u.cmd.rx_mic_key,
3416 			       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3417 			       IWL_MIC_KEY_SIZE);
3418 			pn = atomic64_read(&key->tx_pn);
3419 
3420 		} else {
3421 			u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3422 			for (i = 0; i < 5; i++)
3423 				u.cmd_v1.tkip_rx_ttak[i] =
3424 					cpu_to_le16(tkip_p1k[i]);
3425 		}
3426 		memcpy(u.cmd.common.key, key->key, key->keylen);
3427 		break;
3428 	case WLAN_CIPHER_SUITE_CCMP:
3429 		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3430 		memcpy(u.cmd.common.key, key->key, key->keylen);
3431 		if (api_ver >= 2)
3432 			pn = atomic64_read(&key->tx_pn);
3433 		break;
3434 	case WLAN_CIPHER_SUITE_WEP104:
3435 		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3436 		fallthrough;
3437 	case WLAN_CIPHER_SUITE_WEP40:
3438 		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3439 		memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3440 		break;
3441 	case WLAN_CIPHER_SUITE_GCMP_256:
3442 		key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3443 		fallthrough;
3444 	case WLAN_CIPHER_SUITE_GCMP:
3445 		key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3446 		memcpy(u.cmd.common.key, key->key, key->keylen);
3447 		if (api_ver >= 2)
3448 			pn = atomic64_read(&key->tx_pn);
3449 		break;
3450 	default:
3451 		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3452 		memcpy(u.cmd.common.key, key->key, key->keylen);
3453 	}
3454 
3455 	if (mcast)
3456 		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3457 	if (mfp)
3458 		key_flags |= cpu_to_le16(STA_KEY_MFP);
3459 
3460 	u.cmd.common.key_offset = key_offset;
3461 	u.cmd.common.key_flags = key_flags;
3462 	u.cmd.common.sta_id = sta_id;
3463 
3464 	if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3465 		i = 0;
3466 	else
3467 		i = -1;
3468 
3469 	for (; i < IEEE80211_NUM_TIDS; i++) {
3470 		struct ieee80211_key_seq seq = {};
3471 		u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3472 		int rx_pn_len = 8;
3473 		/* there's a hole at 2/3 in FW format depending on version */
3474 		int hole = api_ver >= 3 ? 0 : 2;
3475 
3476 		ieee80211_get_key_rx_seq(key, i, &seq);
3477 
3478 		if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3479 			rx_pn[0] = seq.tkip.iv16;
3480 			rx_pn[1] = seq.tkip.iv16 >> 8;
3481 			rx_pn[2 + hole] = seq.tkip.iv32;
3482 			rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3483 			rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3484 			rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3485 		} else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3486 			rx_pn = seq.hw.seq;
3487 			rx_pn_len = seq.hw.seq_len;
3488 		} else {
3489 			rx_pn[0] = seq.ccmp.pn[0];
3490 			rx_pn[1] = seq.ccmp.pn[1];
3491 			rx_pn[2 + hole] = seq.ccmp.pn[2];
3492 			rx_pn[3 + hole] = seq.ccmp.pn[3];
3493 			rx_pn[4 + hole] = seq.ccmp.pn[4];
3494 			rx_pn[5 + hole] = seq.ccmp.pn[5];
3495 		}
3496 
3497 		if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3498 				   rx_pn_len) > 0)
3499 			memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3500 			       rx_pn_len);
3501 	}
3502 
3503 	if (api_ver >= 2) {
3504 		u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3505 		size = sizeof(u.cmd);
3506 	} else {
3507 		size = sizeof(u.cmd_v1);
3508 	}
3509 
3510 	status = ADD_STA_SUCCESS;
3511 	if (cmd_flags & CMD_ASYNC)
3512 		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3513 					   &u.cmd);
3514 	else
3515 		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3516 						  &u.cmd, &status);
3517 
3518 	switch (status) {
3519 	case ADD_STA_SUCCESS:
3520 		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3521 		break;
3522 	default:
3523 		ret = -EIO;
3524 		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3525 		break;
3526 	}
3527 
3528 	return ret;
3529 }
3530 
3531 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3532 				 struct ieee80211_key_conf *keyconf,
3533 				 u8 sta_id, bool remove_key)
3534 {
3535 	struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3536 
3537 	/* verify the key details match the required command's expectations */
3538 	if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3539 		    (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3540 		     keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3541 		    (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3542 		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3543 		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3544 		return -EINVAL;
3545 
3546 	if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3547 		    keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3548 		return -EINVAL;
3549 
3550 	igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3551 	igtk_cmd.sta_id = cpu_to_le32(sta_id);
3552 
3553 	if (remove_key) {
3554 		/* This is a valid situation for IGTK */
3555 		if (sta_id == IWL_MVM_INVALID_STA)
3556 			return 0;
3557 
3558 		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3559 	} else {
3560 		struct ieee80211_key_seq seq;
3561 		const u8 *pn;
3562 
3563 		switch (keyconf->cipher) {
3564 		case WLAN_CIPHER_SUITE_AES_CMAC:
3565 			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3566 			break;
3567 		case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3568 		case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3569 			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3570 			break;
3571 		default:
3572 			return -EINVAL;
3573 		}
3574 
3575 		memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3576 		if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3577 			igtk_cmd.ctrl_flags |=
3578 				cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3579 		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3580 		pn = seq.aes_cmac.pn;
3581 		igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3582 						       ((u64) pn[4] << 8) |
3583 						       ((u64) pn[3] << 16) |
3584 						       ((u64) pn[2] << 24) |
3585 						       ((u64) pn[1] << 32) |
3586 						       ((u64) pn[0] << 40));
3587 	}
3588 
3589 	IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3590 		       remove_key ? "removing" : "installing",
3591 		       keyconf->keyidx >= 6 ? "B" : "",
3592 		       keyconf->keyidx, igtk_cmd.sta_id);
3593 
3594 	if (!iwl_mvm_has_new_rx_api(mvm)) {
3595 		struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3596 			.ctrl_flags = igtk_cmd.ctrl_flags,
3597 			.key_id = igtk_cmd.key_id,
3598 			.sta_id = igtk_cmd.sta_id,
3599 			.receive_seq_cnt = igtk_cmd.receive_seq_cnt
3600 		};
3601 
3602 		memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3603 		       ARRAY_SIZE(igtk_cmd_v1.igtk));
3604 		return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3605 					    sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3606 	}
3607 	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3608 				    sizeof(igtk_cmd), &igtk_cmd);
3609 }
3610 
3611 
3612 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3613 				       struct ieee80211_vif *vif,
3614 				       struct ieee80211_sta *sta)
3615 {
3616 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3617 
3618 	if (sta)
3619 		return sta->addr;
3620 
3621 	if (vif->type == NL80211_IFTYPE_STATION &&
3622 	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3623 		u8 sta_id = mvmvif->ap_sta_id;
3624 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3625 						lockdep_is_held(&mvm->mutex));
3626 		return sta->addr;
3627 	}
3628 
3629 
3630 	return NULL;
3631 }
3632 
3633 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3634 				 struct ieee80211_vif *vif,
3635 				 struct ieee80211_sta *sta,
3636 				 struct ieee80211_key_conf *keyconf,
3637 				 u8 key_offset,
3638 				 bool mcast)
3639 {
3640 	const u8 *addr;
3641 	struct ieee80211_key_seq seq;
3642 	u16 p1k[5];
3643 	u32 sta_id;
3644 	bool mfp = false;
3645 
3646 	if (sta) {
3647 		struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3648 
3649 		sta_id = mvm_sta->sta_id;
3650 		mfp = sta->mfp;
3651 	} else if (vif->type == NL80211_IFTYPE_AP &&
3652 		   !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3653 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3654 
3655 		sta_id = mvmvif->mcast_sta.sta_id;
3656 	} else {
3657 		IWL_ERR(mvm, "Failed to find station id\n");
3658 		return -EINVAL;
3659 	}
3660 
3661 	if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3662 		addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3663 		/* get phase 1 key from mac80211 */
3664 		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3665 		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3666 
3667 		return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3668 					    seq.tkip.iv32, p1k, 0, key_offset,
3669 					    mfp);
3670 	}
3671 
3672 	return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3673 				    0, NULL, 0, key_offset, mfp);
3674 }
3675 
3676 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3677 			struct ieee80211_vif *vif,
3678 			struct ieee80211_sta *sta,
3679 			struct ieee80211_key_conf *keyconf,
3680 			u8 key_offset)
3681 {
3682 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3683 	struct iwl_mvm_sta *mvm_sta;
3684 	u8 sta_id = IWL_MVM_INVALID_STA;
3685 	int ret;
3686 	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3687 
3688 	lockdep_assert_held(&mvm->mutex);
3689 
3690 	if (vif->type != NL80211_IFTYPE_AP ||
3691 	    keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3692 		/* Get the station id from the mvm local station table */
3693 		mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3694 		if (!mvm_sta) {
3695 			IWL_ERR(mvm, "Failed to find station\n");
3696 			return -EINVAL;
3697 		}
3698 		sta_id = mvm_sta->sta_id;
3699 
3700 		/*
3701 		 * It is possible that the 'sta' parameter is NULL, and thus
3702 		 * there is a need to retrieve the sta from the local station
3703 		 * table.
3704 		 */
3705 		if (!sta) {
3706 			sta = rcu_dereference_protected(
3707 				mvm->fw_id_to_mac_id[sta_id],
3708 				lockdep_is_held(&mvm->mutex));
3709 			if (IS_ERR_OR_NULL(sta)) {
3710 				IWL_ERR(mvm, "Invalid station id\n");
3711 				return -EINVAL;
3712 			}
3713 		}
3714 
3715 		if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3716 			return -EINVAL;
3717 	} else {
3718 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3719 
3720 		sta_id = mvmvif->mcast_sta.sta_id;
3721 	}
3722 
3723 	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3724 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3725 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3726 		ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3727 		goto end;
3728 	}
3729 
3730 	/* If the key_offset is not pre-assigned, we need to find a
3731 	 * new offset to use.  In normal cases, the offset is not
3732 	 * pre-assigned, but during HW_RESTART we want to reuse the
3733 	 * same indices, so we pass them when this function is called.
3734 	 *
3735 	 * In D3 entry, we need to hardcoded the indices (because the
3736 	 * firmware hardcodes the PTK offset to 0).  In this case, we
3737 	 * need to make sure we don't overwrite the hw_key_idx in the
3738 	 * keyconf structure, because otherwise we cannot configure
3739 	 * the original ones back when resuming.
3740 	 */
3741 	if (key_offset == STA_KEY_IDX_INVALID) {
3742 		key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3743 		if (key_offset == STA_KEY_IDX_INVALID)
3744 			return -ENOSPC;
3745 		keyconf->hw_key_idx = key_offset;
3746 	}
3747 
3748 	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3749 	if (ret)
3750 		goto end;
3751 
3752 	/*
3753 	 * For WEP, the same key is used for multicast and unicast. Upload it
3754 	 * again, using the same key offset, and now pointing the other one
3755 	 * to the same key slot (offset).
3756 	 * If this fails, remove the original as well.
3757 	 */
3758 	if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3759 	     keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3760 	    sta) {
3761 		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3762 					    key_offset, !mcast);
3763 		if (ret) {
3764 			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3765 			goto end;
3766 		}
3767 	}
3768 
3769 	__set_bit(key_offset, mvm->fw_key_table);
3770 
3771 end:
3772 	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3773 		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3774 		      sta ? sta->addr : zero_addr, ret);
3775 	return ret;
3776 }
3777 
3778 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3779 			   struct ieee80211_vif *vif,
3780 			   struct ieee80211_sta *sta,
3781 			   struct ieee80211_key_conf *keyconf)
3782 {
3783 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3784 	struct iwl_mvm_sta *mvm_sta;
3785 	u8 sta_id = IWL_MVM_INVALID_STA;
3786 	int ret, i;
3787 
3788 	lockdep_assert_held(&mvm->mutex);
3789 
3790 	/* Get the station from the mvm local station table */
3791 	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3792 	if (mvm_sta)
3793 		sta_id = mvm_sta->sta_id;
3794 	else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3795 		sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3796 
3797 
3798 	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3799 		      keyconf->keyidx, sta_id);
3800 
3801 	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3802 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3803 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3804 		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3805 
3806 	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3807 		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3808 			keyconf->hw_key_idx);
3809 		return -ENOENT;
3810 	}
3811 
3812 	/* track which key was deleted last */
3813 	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3814 		if (mvm->fw_key_deleted[i] < U8_MAX)
3815 			mvm->fw_key_deleted[i]++;
3816 	}
3817 	mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3818 
3819 	if (sta && !mvm_sta) {
3820 		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3821 		return 0;
3822 	}
3823 
3824 	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3825 	if (ret)
3826 		return ret;
3827 
3828 	/* delete WEP key twice to get rid of (now useless) offset */
3829 	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3830 	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3831 		ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3832 
3833 	return ret;
3834 }
3835 
3836 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3837 			     struct ieee80211_vif *vif,
3838 			     struct ieee80211_key_conf *keyconf,
3839 			     struct ieee80211_sta *sta, u32 iv32,
3840 			     u16 *phase1key)
3841 {
3842 	struct iwl_mvm_sta *mvm_sta;
3843 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3844 	bool mfp = sta ? sta->mfp : false;
3845 
3846 	rcu_read_lock();
3847 
3848 	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3849 	if (WARN_ON_ONCE(!mvm_sta))
3850 		goto unlock;
3851 	iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3852 			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3853 			     mfp);
3854 
3855  unlock:
3856 	rcu_read_unlock();
3857 }
3858 
3859 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3860 				struct ieee80211_sta *sta)
3861 {
3862 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3863 	struct iwl_mvm_add_sta_cmd cmd = {
3864 		.add_modify = STA_MODE_MODIFY,
3865 		.sta_id = mvmsta->sta_id,
3866 		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
3867 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3868 	};
3869 	int ret;
3870 
3871 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3872 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3873 	if (ret)
3874 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3875 }
3876 
3877 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3878 				       struct ieee80211_sta *sta,
3879 				       enum ieee80211_frame_release_type reason,
3880 				       u16 cnt, u16 tids, bool more_data,
3881 				       bool single_sta_queue)
3882 {
3883 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3884 	struct iwl_mvm_add_sta_cmd cmd = {
3885 		.add_modify = STA_MODE_MODIFY,
3886 		.sta_id = mvmsta->sta_id,
3887 		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3888 		.sleep_tx_count = cpu_to_le16(cnt),
3889 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3890 	};
3891 	int tid, ret;
3892 	unsigned long _tids = tids;
3893 
3894 	/* convert TIDs to ACs - we don't support TSPEC so that's OK
3895 	 * Note that this field is reserved and unused by firmware not
3896 	 * supporting GO uAPSD, so it's safe to always do this.
3897 	 */
3898 	for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3899 		cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3900 
3901 	/* If we're releasing frames from aggregation or dqa queues then check
3902 	 * if all the queues that we're releasing frames from, combined, have:
3903 	 *  - more frames than the service period, in which case more_data
3904 	 *    needs to be set
3905 	 *  - fewer than 'cnt' frames, in which case we need to adjust the
3906 	 *    firmware command (but do that unconditionally)
3907 	 */
3908 	if (single_sta_queue) {
3909 		int remaining = cnt;
3910 		int sleep_tx_count;
3911 
3912 		spin_lock_bh(&mvmsta->lock);
3913 		for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3914 			struct iwl_mvm_tid_data *tid_data;
3915 			u16 n_queued;
3916 
3917 			tid_data = &mvmsta->tid_data[tid];
3918 
3919 			n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3920 			if (n_queued > remaining) {
3921 				more_data = true;
3922 				remaining = 0;
3923 				break;
3924 			}
3925 			remaining -= n_queued;
3926 		}
3927 		sleep_tx_count = cnt - remaining;
3928 		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3929 			mvmsta->sleep_tx_count = sleep_tx_count;
3930 		spin_unlock_bh(&mvmsta->lock);
3931 
3932 		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3933 		if (WARN_ON(cnt - remaining == 0)) {
3934 			ieee80211_sta_eosp(sta);
3935 			return;
3936 		}
3937 	}
3938 
3939 	/* Note: this is ignored by firmware not supporting GO uAPSD */
3940 	if (more_data)
3941 		cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3942 
3943 	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3944 		mvmsta->next_status_eosp = true;
3945 		cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3946 	} else {
3947 		cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3948 	}
3949 
3950 	/* block the Tx queues until the FW updated the sleep Tx count */
3951 	iwl_trans_block_txq_ptrs(mvm->trans, true);
3952 
3953 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3954 				   CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3955 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3956 	if (ret)
3957 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3958 }
3959 
3960 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3961 			   struct iwl_rx_cmd_buffer *rxb)
3962 {
3963 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
3964 	struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3965 	struct ieee80211_sta *sta;
3966 	u32 sta_id = le32_to_cpu(notif->sta_id);
3967 
3968 	if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
3969 		return;
3970 
3971 	rcu_read_lock();
3972 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3973 	if (!IS_ERR_OR_NULL(sta))
3974 		ieee80211_sta_eosp(sta);
3975 	rcu_read_unlock();
3976 }
3977 
3978 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3979 				   struct iwl_mvm_sta *mvmsta, bool disable)
3980 {
3981 	struct iwl_mvm_add_sta_cmd cmd = {
3982 		.add_modify = STA_MODE_MODIFY,
3983 		.sta_id = mvmsta->sta_id,
3984 		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3985 		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3986 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3987 	};
3988 	int ret;
3989 
3990 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3991 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3992 	if (ret)
3993 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3994 }
3995 
3996 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3997 				      struct ieee80211_sta *sta,
3998 				      bool disable)
3999 {
4000 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4001 
4002 	spin_lock_bh(&mvm_sta->lock);
4003 
4004 	if (mvm_sta->disable_tx == disable) {
4005 		spin_unlock_bh(&mvm_sta->lock);
4006 		return;
4007 	}
4008 
4009 	mvm_sta->disable_tx = disable;
4010 
4011 	/*
4012 	 * If sta PS state is handled by mac80211, tell it to start/stop
4013 	 * queuing tx for this station.
4014 	 */
4015 	if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4016 		ieee80211_sta_block_awake(mvm->hw, sta, disable);
4017 
4018 	iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4019 
4020 	spin_unlock_bh(&mvm_sta->lock);
4021 }
4022 
4023 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4024 					      struct iwl_mvm_vif *mvmvif,
4025 					      struct iwl_mvm_int_sta *sta,
4026 					      bool disable)
4027 {
4028 	u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4029 	struct iwl_mvm_add_sta_cmd cmd = {
4030 		.add_modify = STA_MODE_MODIFY,
4031 		.sta_id = sta->sta_id,
4032 		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4033 		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4034 		.mac_id_n_color = cpu_to_le32(id),
4035 	};
4036 	int ret;
4037 
4038 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4039 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4040 	if (ret)
4041 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4042 }
4043 
4044 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4045 				       struct iwl_mvm_vif *mvmvif,
4046 				       bool disable)
4047 {
4048 	struct ieee80211_sta *sta;
4049 	struct iwl_mvm_sta *mvm_sta;
4050 	int i;
4051 
4052 	rcu_read_lock();
4053 
4054 	/* Block/unblock all the stations of the given mvmvif */
4055 	for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4056 		sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4057 		if (IS_ERR_OR_NULL(sta))
4058 			continue;
4059 
4060 		mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4061 		if (mvm_sta->mac_id_n_color !=
4062 		    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4063 			continue;
4064 
4065 		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4066 	}
4067 
4068 	rcu_read_unlock();
4069 
4070 	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4071 		return;
4072 
4073 	/* Need to block/unblock also multicast station */
4074 	if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
4075 		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4076 						  &mvmvif->mcast_sta, disable);
4077 
4078 	/*
4079 	 * Only unblock the broadcast station (FW blocks it for immediate
4080 	 * quiet, not the driver)
4081 	 */
4082 	if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4083 		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4084 						  &mvmvif->bcast_sta, disable);
4085 }
4086 
4087 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4088 {
4089 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4090 	struct iwl_mvm_sta *mvmsta;
4091 
4092 	rcu_read_lock();
4093 
4094 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
4095 
4096 	if (mvmsta)
4097 		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4098 
4099 	rcu_read_unlock();
4100 }
4101 
4102 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4103 {
4104 	u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4105 
4106 	/*
4107 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4108 	 * to align the wrap around of ssn so we compare relevant values.
4109 	 */
4110 	if (mvm->trans->trans_cfg->gen2)
4111 		sn &= 0xff;
4112 
4113 	return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4114 }
4115 
4116 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4117 			 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4118 			 u8 *key, u32 key_len)
4119 {
4120 	int ret;
4121 	u16 queue;
4122 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4123 	struct ieee80211_key_conf *keyconf;
4124 
4125 	ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4126 				       NL80211_IFTYPE_UNSPECIFIED,
4127 				       IWL_STA_LINK);
4128 	if (ret)
4129 		return ret;
4130 
4131 	ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
4132 					     addr, sta, &queue,
4133 					     IWL_MVM_TX_FIFO_BE);
4134 	if (ret)
4135 		goto out;
4136 
4137 	keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL);
4138 	if (!keyconf) {
4139 		ret = -ENOBUFS;
4140 		goto out;
4141 	}
4142 
4143 	keyconf->cipher = cipher;
4144 	memcpy(keyconf->key, key, key_len);
4145 	keyconf->keylen = key_len;
4146 
4147 	ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4148 				   0, NULL, 0, 0, true);
4149 	kfree(keyconf);
4150 	return 0;
4151 out:
4152 	iwl_mvm_dealloc_int_sta(mvm, sta);
4153 	return ret;
4154 }
4155 
4156 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4157 				   struct ieee80211_vif *vif,
4158 				   u32 mac_id)
4159 {
4160 	struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4161 		.mac_id = cpu_to_le32(mac_id),
4162 	};
4163 	int ret;
4164 
4165 	ret = iwl_mvm_send_cmd_pdu(mvm,
4166 				   WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4167 				   CMD_ASYNC,
4168 				   sizeof(cancel_channel_switch_cmd),
4169 				   &cancel_channel_switch_cmd);
4170 	if (ret)
4171 		IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4172 }
4173