1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11  * Copyright(c) 2018 Intel Corporation
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of version 2 of the GNU General Public License as
15  * published by the Free Software Foundation.
16  *
17  * This program is distributed in the hope that it will be useful, but
18  * WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
20  * General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25  * USA
26  *
27  * The full GNU General Public License is included in this distribution
28  * in the file called COPYING.
29  *
30  * Contact Information:
31  *  Intel Linux Wireless <linuxwifi@intel.com>
32  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33  *
34  * BSD LICENSE
35  *
36  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
37  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
38  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
39  * Copyright(c) 2018 Intel Corporation
40  * All rights reserved.
41  *
42  * Redistribution and use in source and binary forms, with or without
43  * modification, are permitted provided that the following conditions
44  * are met:
45  *
46  *  * Redistributions of source code must retain the above copyright
47  *    notice, this list of conditions and the following disclaimer.
48  *  * Redistributions in binary form must reproduce the above copyright
49  *    notice, this list of conditions and the following disclaimer in
50  *    the documentation and/or other materials provided with the
51  *    distribution.
52  *  * Neither the name Intel Corporation nor the names of its
53  *    contributors may be used to endorse or promote products derived
54  *    from this software without specific prior written permission.
55  *
56  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
57  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
58  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
59  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
60  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
61  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
62  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
66  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
67  *
68  *****************************************************************************/
69 #include <net/mac80211.h>
70 
71 #include "mvm.h"
72 #include "sta.h"
73 #include "rs.h"
74 
75 /*
76  * New version of ADD_STA_sta command added new fields at the end of the
77  * structure, so sending the size of the relevant API's structure is enough to
78  * support both API versions.
79  */
80 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
81 {
82 	if (iwl_mvm_has_new_rx_api(mvm) ||
83 	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
84 		return sizeof(struct iwl_mvm_add_sta_cmd);
85 	else
86 		return sizeof(struct iwl_mvm_add_sta_cmd_v7);
87 }
88 
89 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
90 				    enum nl80211_iftype iftype)
91 {
92 	int sta_id;
93 	u32 reserved_ids = 0;
94 
95 	BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
96 	WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
97 
98 	lockdep_assert_held(&mvm->mutex);
99 
100 	/* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
101 	if (iftype != NL80211_IFTYPE_STATION)
102 		reserved_ids = BIT(0);
103 
104 	/* Don't take rcu_read_lock() since we are protected by mvm->mutex */
105 	for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
106 		if (BIT(sta_id) & reserved_ids)
107 			continue;
108 
109 		if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
110 					       lockdep_is_held(&mvm->mutex)))
111 			return sta_id;
112 	}
113 	return IWL_MVM_INVALID_STA;
114 }
115 
116 /* send station add/update command to firmware */
117 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
118 			   bool update, unsigned int flags)
119 {
120 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
121 	struct iwl_mvm_add_sta_cmd add_sta_cmd = {
122 		.sta_id = mvm_sta->sta_id,
123 		.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
124 		.add_modify = update ? 1 : 0,
125 		.station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
126 						 STA_FLG_MIMO_EN_MSK |
127 						 STA_FLG_RTS_MIMO_PROT),
128 		.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
129 	};
130 	int ret;
131 	u32 status;
132 	u32 agg_size = 0, mpdu_dens = 0;
133 
134 	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
135 		add_sta_cmd.station_type = mvm_sta->sta_type;
136 
137 	if (!update || (flags & STA_MODIFY_QUEUES)) {
138 		memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
139 
140 		if (!iwl_mvm_has_new_tx_api(mvm)) {
141 			add_sta_cmd.tfd_queue_msk =
142 				cpu_to_le32(mvm_sta->tfd_queue_msk);
143 
144 			if (flags & STA_MODIFY_QUEUES)
145 				add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
146 		} else {
147 			WARN_ON(flags & STA_MODIFY_QUEUES);
148 		}
149 	}
150 
151 	switch (sta->bandwidth) {
152 	case IEEE80211_STA_RX_BW_160:
153 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
154 		/* fall through */
155 	case IEEE80211_STA_RX_BW_80:
156 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
157 		/* fall through */
158 	case IEEE80211_STA_RX_BW_40:
159 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
160 		/* fall through */
161 	case IEEE80211_STA_RX_BW_20:
162 		if (sta->ht_cap.ht_supported)
163 			add_sta_cmd.station_flags |=
164 				cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
165 		break;
166 	}
167 
168 	switch (sta->rx_nss) {
169 	case 1:
170 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
171 		break;
172 	case 2:
173 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
174 		break;
175 	case 3 ... 8:
176 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
177 		break;
178 	}
179 
180 	switch (sta->smps_mode) {
181 	case IEEE80211_SMPS_AUTOMATIC:
182 	case IEEE80211_SMPS_NUM_MODES:
183 		WARN_ON(1);
184 		break;
185 	case IEEE80211_SMPS_STATIC:
186 		/* override NSS */
187 		add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
188 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
189 		break;
190 	case IEEE80211_SMPS_DYNAMIC:
191 		add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
192 		break;
193 	case IEEE80211_SMPS_OFF:
194 		/* nothing */
195 		break;
196 	}
197 
198 	if (sta->ht_cap.ht_supported) {
199 		add_sta_cmd.station_flags_msk |=
200 			cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
201 				    STA_FLG_AGG_MPDU_DENS_MSK);
202 
203 		mpdu_dens = sta->ht_cap.ampdu_density;
204 	}
205 
206 	if (sta->vht_cap.vht_supported) {
207 		agg_size = sta->vht_cap.cap &
208 			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
209 		agg_size >>=
210 			IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
211 	} else if (sta->ht_cap.ht_supported) {
212 		agg_size = sta->ht_cap.ampdu_factor;
213 	}
214 
215 	add_sta_cmd.station_flags |=
216 		cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
217 	add_sta_cmd.station_flags |=
218 		cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
219 	if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
220 		add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
221 
222 	if (sta->wme) {
223 		add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
224 
225 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
226 			add_sta_cmd.uapsd_acs |= BIT(AC_BK);
227 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
228 			add_sta_cmd.uapsd_acs |= BIT(AC_BE);
229 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
230 			add_sta_cmd.uapsd_acs |= BIT(AC_VI);
231 		if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
232 			add_sta_cmd.uapsd_acs |= BIT(AC_VO);
233 		add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
234 		add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
235 	}
236 
237 	status = ADD_STA_SUCCESS;
238 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
239 					  iwl_mvm_add_sta_cmd_size(mvm),
240 					  &add_sta_cmd, &status);
241 	if (ret)
242 		return ret;
243 
244 	switch (status & IWL_ADD_STA_STATUS_MASK) {
245 	case ADD_STA_SUCCESS:
246 		IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
247 		break;
248 	default:
249 		ret = -EIO;
250 		IWL_ERR(mvm, "ADD_STA failed\n");
251 		break;
252 	}
253 
254 	return ret;
255 }
256 
257 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
258 {
259 	struct iwl_mvm_baid_data *data =
260 		from_timer(data, t, session_timer);
261 	struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
262 	struct iwl_mvm_baid_data *ba_data;
263 	struct ieee80211_sta *sta;
264 	struct iwl_mvm_sta *mvm_sta;
265 	unsigned long timeout;
266 
267 	rcu_read_lock();
268 
269 	ba_data = rcu_dereference(*rcu_ptr);
270 
271 	if (WARN_ON(!ba_data))
272 		goto unlock;
273 
274 	if (!ba_data->timeout)
275 		goto unlock;
276 
277 	timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
278 	if (time_is_after_jiffies(timeout)) {
279 		mod_timer(&ba_data->session_timer, timeout);
280 		goto unlock;
281 	}
282 
283 	/* Timer expired */
284 	sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
285 
286 	/*
287 	 * sta should be valid unless the following happens:
288 	 * The firmware asserts which triggers a reconfig flow, but
289 	 * the reconfig fails before we set the pointer to sta into
290 	 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
291 	 * A-MDPU and hence the timer continues to run. Then, the
292 	 * timer expires and sta is NULL.
293 	 */
294 	if (!sta)
295 		goto unlock;
296 
297 	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
298 	ieee80211_rx_ba_timer_expired(mvm_sta->vif,
299 				      sta->addr, ba_data->tid);
300 unlock:
301 	rcu_read_unlock();
302 }
303 
304 /* Disable aggregations for a bitmap of TIDs for a given station */
305 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
306 					unsigned long disable_agg_tids,
307 					bool remove_queue)
308 {
309 	struct iwl_mvm_add_sta_cmd cmd = {};
310 	struct ieee80211_sta *sta;
311 	struct iwl_mvm_sta *mvmsta;
312 	u32 status;
313 	u8 sta_id;
314 	int ret;
315 
316 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
317 		return -EINVAL;
318 
319 	spin_lock_bh(&mvm->queue_info_lock);
320 	sta_id = mvm->queue_info[queue].ra_sta_id;
321 	spin_unlock_bh(&mvm->queue_info_lock);
322 
323 	rcu_read_lock();
324 
325 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
326 
327 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
328 		rcu_read_unlock();
329 		return -EINVAL;
330 	}
331 
332 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
333 
334 	mvmsta->tid_disable_agg |= disable_agg_tids;
335 
336 	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
337 	cmd.sta_id = mvmsta->sta_id;
338 	cmd.add_modify = STA_MODE_MODIFY;
339 	cmd.modify_mask = STA_MODIFY_QUEUES;
340 	if (disable_agg_tids)
341 		cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
342 	if (remove_queue)
343 		cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
344 	cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
345 	cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
346 
347 	rcu_read_unlock();
348 
349 	/* Notify FW of queue removal from the STA queues */
350 	status = ADD_STA_SUCCESS;
351 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
352 					  iwl_mvm_add_sta_cmd_size(mvm),
353 					  &cmd, &status);
354 
355 	return ret;
356 }
357 
358 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
359 {
360 	struct ieee80211_sta *sta;
361 	struct iwl_mvm_sta *mvmsta;
362 	unsigned long tid_bitmap;
363 	unsigned long agg_tids = 0;
364 	u8 sta_id;
365 	int tid;
366 
367 	lockdep_assert_held(&mvm->mutex);
368 
369 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
370 		return -EINVAL;
371 
372 	spin_lock_bh(&mvm->queue_info_lock);
373 	sta_id = mvm->queue_info[queue].ra_sta_id;
374 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
375 	spin_unlock_bh(&mvm->queue_info_lock);
376 
377 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
378 					lockdep_is_held(&mvm->mutex));
379 
380 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
381 		return -EINVAL;
382 
383 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
384 
385 	spin_lock_bh(&mvmsta->lock);
386 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
387 		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
388 			agg_tids |= BIT(tid);
389 	}
390 	spin_unlock_bh(&mvmsta->lock);
391 
392 	return agg_tids;
393 }
394 
395 /*
396  * Remove a queue from a station's resources.
397  * Note that this only marks as free. It DOESN'T delete a BA agreement, and
398  * doesn't disable the queue
399  */
400 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
401 {
402 	struct ieee80211_sta *sta;
403 	struct iwl_mvm_sta *mvmsta;
404 	unsigned long tid_bitmap;
405 	unsigned long disable_agg_tids = 0;
406 	u8 sta_id;
407 	int tid;
408 
409 	lockdep_assert_held(&mvm->mutex);
410 
411 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
412 		return -EINVAL;
413 
414 	spin_lock_bh(&mvm->queue_info_lock);
415 	sta_id = mvm->queue_info[queue].ra_sta_id;
416 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
417 	spin_unlock_bh(&mvm->queue_info_lock);
418 
419 	rcu_read_lock();
420 
421 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
422 
423 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
424 		rcu_read_unlock();
425 		return 0;
426 	}
427 
428 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
429 
430 	spin_lock_bh(&mvmsta->lock);
431 	/* Unmap MAC queues and TIDs from this queue */
432 	for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
433 		if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
434 			disable_agg_tids |= BIT(tid);
435 		mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
436 	}
437 
438 	mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
439 	spin_unlock_bh(&mvmsta->lock);
440 
441 	rcu_read_unlock();
442 
443 	return disable_agg_tids;
444 }
445 
446 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
447 				       bool same_sta)
448 {
449 	struct iwl_mvm_sta *mvmsta;
450 	u8 txq_curr_ac, sta_id, tid;
451 	unsigned long disable_agg_tids = 0;
452 	int ret;
453 
454 	lockdep_assert_held(&mvm->mutex);
455 
456 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
457 		return -EINVAL;
458 
459 	spin_lock_bh(&mvm->queue_info_lock);
460 	txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
461 	sta_id = mvm->queue_info[queue].ra_sta_id;
462 	tid = mvm->queue_info[queue].txq_tid;
463 	spin_unlock_bh(&mvm->queue_info_lock);
464 
465 	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
466 	if (WARN_ON(!mvmsta))
467 		return -EINVAL;
468 
469 	disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
470 	/* Disable the queue */
471 	if (disable_agg_tids)
472 		iwl_mvm_invalidate_sta_queue(mvm, queue,
473 					     disable_agg_tids, false);
474 
475 	ret = iwl_mvm_disable_txq(mvm, queue,
476 				  mvmsta->vif->hw_queue[txq_curr_ac],
477 				  tid, 0);
478 	if (ret) {
479 		/* Re-mark the inactive queue as inactive */
480 		spin_lock_bh(&mvm->queue_info_lock);
481 		mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
482 		spin_unlock_bh(&mvm->queue_info_lock);
483 		IWL_ERR(mvm,
484 			"Failed to free inactive queue %d (ret=%d)\n",
485 			queue, ret);
486 
487 		return ret;
488 	}
489 
490 	/* If TXQ is allocated to another STA, update removal in FW */
491 	if (!same_sta)
492 		iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
493 
494 	return 0;
495 }
496 
497 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
498 				    unsigned long tfd_queue_mask, u8 ac)
499 {
500 	int queue = 0;
501 	u8 ac_to_queue[IEEE80211_NUM_ACS];
502 	int i;
503 
504 	lockdep_assert_held(&mvm->queue_info_lock);
505 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
506 		return -EINVAL;
507 
508 	memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
509 
510 	/* See what ACs the existing queues for this STA have */
511 	for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
512 		/* Only DATA queues can be shared */
513 		if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
514 		    i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
515 			continue;
516 
517 		/* Don't try and take queues being reconfigured */
518 		if (mvm->queue_info[queue].status ==
519 		    IWL_MVM_QUEUE_RECONFIGURING)
520 			continue;
521 
522 		ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
523 	}
524 
525 	/*
526 	 * The queue to share is chosen only from DATA queues as follows (in
527 	 * descending priority):
528 	 * 1. An AC_BE queue
529 	 * 2. Same AC queue
530 	 * 3. Highest AC queue that is lower than new AC
531 	 * 4. Any existing AC (there always is at least 1 DATA queue)
532 	 */
533 
534 	/* Priority 1: An AC_BE queue */
535 	if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
536 		queue = ac_to_queue[IEEE80211_AC_BE];
537 	/* Priority 2: Same AC queue */
538 	else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
539 		queue = ac_to_queue[ac];
540 	/* Priority 3a: If new AC is VO and VI exists - use VI */
541 	else if (ac == IEEE80211_AC_VO &&
542 		 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
543 		queue = ac_to_queue[IEEE80211_AC_VI];
544 	/* Priority 3b: No BE so only AC less than the new one is BK */
545 	else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
546 		queue = ac_to_queue[IEEE80211_AC_BK];
547 	/* Priority 4a: No BE nor BK - use VI if exists */
548 	else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
549 		queue = ac_to_queue[IEEE80211_AC_VI];
550 	/* Priority 4b: No BE, BK nor VI - use VO if exists */
551 	else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
552 		queue = ac_to_queue[IEEE80211_AC_VO];
553 
554 	/* Make sure queue found (or not) is legal */
555 	if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
556 	    !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
557 	    (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
558 		IWL_ERR(mvm, "No DATA queues available to share\n");
559 		return -ENOSPC;
560 	}
561 
562 	/* Make sure the queue isn't in the middle of being reconfigured */
563 	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
564 		IWL_ERR(mvm,
565 			"TXQ %d is in the middle of re-config - try again\n",
566 			queue);
567 		return -EBUSY;
568 	}
569 
570 	return queue;
571 }
572 
573 /*
574  * If a given queue has a higher AC than the TID stream that is being compared
575  * to, the queue needs to be redirected to the lower AC. This function does that
576  * in such a case, otherwise - if no redirection required - it does nothing,
577  * unless the %force param is true.
578  */
579 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
580 			       int ac, int ssn, unsigned int wdg_timeout,
581 			       bool force)
582 {
583 	struct iwl_scd_txq_cfg_cmd cmd = {
584 		.scd_queue = queue,
585 		.action = SCD_CFG_DISABLE_QUEUE,
586 	};
587 	bool shared_queue;
588 	unsigned long mq;
589 	int ret;
590 
591 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
592 		return -EINVAL;
593 
594 	/*
595 	 * If the AC is lower than current one - FIFO needs to be redirected to
596 	 * the lowest one of the streams in the queue. Check if this is needed
597 	 * here.
598 	 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
599 	 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
600 	 * we need to check if the numerical value of X is LARGER than of Y.
601 	 */
602 	spin_lock_bh(&mvm->queue_info_lock);
603 	if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
604 		spin_unlock_bh(&mvm->queue_info_lock);
605 
606 		IWL_DEBUG_TX_QUEUES(mvm,
607 				    "No redirection needed on TXQ #%d\n",
608 				    queue);
609 		return 0;
610 	}
611 
612 	cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
613 	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
614 	cmd.tid = mvm->queue_info[queue].txq_tid;
615 	mq = mvm->hw_queue_to_mac80211[queue];
616 	shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
617 	spin_unlock_bh(&mvm->queue_info_lock);
618 
619 	IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
620 			    queue, iwl_mvm_ac_to_tx_fifo[ac]);
621 
622 	/* Stop MAC queues and wait for this queue to empty */
623 	iwl_mvm_stop_mac_queues(mvm, mq);
624 	ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
625 	if (ret) {
626 		IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
627 			queue);
628 		ret = -EIO;
629 		goto out;
630 	}
631 
632 	/* Before redirecting the queue we need to de-activate it */
633 	iwl_trans_txq_disable(mvm->trans, queue, false);
634 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
635 	if (ret)
636 		IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
637 			ret);
638 
639 	/* Make sure the SCD wrptr is correctly set before reconfiguring */
640 	iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
641 
642 	/* Update the TID "owner" of the queue */
643 	spin_lock_bh(&mvm->queue_info_lock);
644 	mvm->queue_info[queue].txq_tid = tid;
645 	spin_unlock_bh(&mvm->queue_info_lock);
646 
647 	/* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
648 
649 	/* Redirect to lower AC */
650 	iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
651 			     cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
652 
653 	/* Update AC marking of the queue */
654 	spin_lock_bh(&mvm->queue_info_lock);
655 	mvm->queue_info[queue].mac80211_ac = ac;
656 	spin_unlock_bh(&mvm->queue_info_lock);
657 
658 	/*
659 	 * Mark queue as shared in transport if shared
660 	 * Note this has to be done after queue enablement because enablement
661 	 * can also set this value, and there is no indication there to shared
662 	 * queues
663 	 */
664 	if (shared_queue)
665 		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
666 
667 out:
668 	/* Continue using the MAC queues */
669 	iwl_mvm_start_mac_queues(mvm, mq);
670 
671 	return ret;
672 }
673 
674 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
675 					struct ieee80211_sta *sta, u8 ac,
676 					int tid)
677 {
678 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
679 	unsigned int wdg_timeout =
680 		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
681 	u8 mac_queue = mvmsta->vif->hw_queue[ac];
682 	int queue = -1;
683 
684 	lockdep_assert_held(&mvm->mutex);
685 
686 	IWL_DEBUG_TX_QUEUES(mvm,
687 			    "Allocating queue for sta %d on tid %d\n",
688 			    mvmsta->sta_id, tid);
689 	queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
690 					wdg_timeout);
691 	if (queue < 0)
692 		return queue;
693 
694 	IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
695 
696 	spin_lock_bh(&mvmsta->lock);
697 	mvmsta->tid_data[tid].txq_id = queue;
698 	mvmsta->tid_data[tid].is_tid_active = true;
699 	spin_unlock_bh(&mvmsta->lock);
700 
701 	return 0;
702 }
703 
704 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
705 				   struct ieee80211_sta *sta, u8 ac, int tid,
706 				   struct ieee80211_hdr *hdr)
707 {
708 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
709 	struct iwl_trans_txq_scd_cfg cfg = {
710 		.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
711 		.sta_id = mvmsta->sta_id,
712 		.tid = tid,
713 		.frame_limit = IWL_FRAME_LIMIT,
714 	};
715 	unsigned int wdg_timeout =
716 		iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
717 	u8 mac_queue = mvmsta->vif->hw_queue[ac];
718 	int queue = -1;
719 	bool using_inactive_queue = false, same_sta = false;
720 	unsigned long disable_agg_tids = 0;
721 	enum iwl_mvm_agg_state queue_state;
722 	bool shared_queue = false, inc_ssn;
723 	int ssn;
724 	unsigned long tfd_queue_mask;
725 	int ret;
726 
727 	lockdep_assert_held(&mvm->mutex);
728 
729 	if (iwl_mvm_has_new_tx_api(mvm))
730 		return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
731 
732 	spin_lock_bh(&mvmsta->lock);
733 	tfd_queue_mask = mvmsta->tfd_queue_msk;
734 	spin_unlock_bh(&mvmsta->lock);
735 
736 	spin_lock_bh(&mvm->queue_info_lock);
737 
738 	/*
739 	 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
740 	 * exists
741 	 */
742 	if (!ieee80211_is_data_qos(hdr->frame_control) ||
743 	    ieee80211_is_qos_nullfunc(hdr->frame_control)) {
744 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
745 						IWL_MVM_DQA_MIN_MGMT_QUEUE,
746 						IWL_MVM_DQA_MAX_MGMT_QUEUE);
747 		if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
748 			IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
749 					    queue);
750 
751 		/* If no such queue is found, we'll use a DATA queue instead */
752 	}
753 
754 	if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
755 	    (mvm->queue_info[mvmsta->reserved_queue].status ==
756 	     IWL_MVM_QUEUE_RESERVED ||
757 	     mvm->queue_info[mvmsta->reserved_queue].status ==
758 	     IWL_MVM_QUEUE_INACTIVE)) {
759 		queue = mvmsta->reserved_queue;
760 		mvm->queue_info[queue].reserved = true;
761 		IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
762 	}
763 
764 	if (queue < 0)
765 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
766 						IWL_MVM_DQA_MIN_DATA_QUEUE,
767 						IWL_MVM_DQA_MAX_DATA_QUEUE);
768 
769 	/*
770 	 * Check if this queue is already allocated but inactive.
771 	 * In such a case, we'll need to first free this queue before enabling
772 	 * it again, so we'll mark it as reserved to make sure no new traffic
773 	 * arrives on it
774 	 */
775 	if (queue > 0 &&
776 	    mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
777 		mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
778 		using_inactive_queue = true;
779 		same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
780 		IWL_DEBUG_TX_QUEUES(mvm,
781 				    "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
782 				    queue, mvmsta->sta_id, tid);
783 	}
784 
785 	/* No free queue - we'll have to share */
786 	if (queue <= 0) {
787 		queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
788 		if (queue > 0) {
789 			shared_queue = true;
790 			mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
791 		}
792 	}
793 
794 	/*
795 	 * Mark TXQ as ready, even though it hasn't been fully configured yet,
796 	 * to make sure no one else takes it.
797 	 * This will allow avoiding re-acquiring the lock at the end of the
798 	 * configuration. On error we'll mark it back as free.
799 	 */
800 	if ((queue > 0) && !shared_queue)
801 		mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
802 
803 	spin_unlock_bh(&mvm->queue_info_lock);
804 
805 	/* This shouldn't happen - out of queues */
806 	if (WARN_ON(queue <= 0)) {
807 		IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
808 			tid, cfg.sta_id);
809 		return queue;
810 	}
811 
812 	/*
813 	 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
814 	 * but for configuring the SCD to send A-MPDUs we need to mark the queue
815 	 * as aggregatable.
816 	 * Mark all DATA queues as allowing to be aggregated at some point
817 	 */
818 	cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
819 			 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
820 
821 	/*
822 	 * If this queue was previously inactive (idle) - we need to free it
823 	 * first
824 	 */
825 	if (using_inactive_queue) {
826 		ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
827 		if (ret)
828 			return ret;
829 	}
830 
831 	IWL_DEBUG_TX_QUEUES(mvm,
832 			    "Allocating %squeue #%d to sta %d on tid %d\n",
833 			    shared_queue ? "shared " : "", queue,
834 			    mvmsta->sta_id, tid);
835 
836 	if (shared_queue) {
837 		/* Disable any open aggs on this queue */
838 		disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
839 
840 		if (disable_agg_tids) {
841 			IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
842 					    queue);
843 			iwl_mvm_invalidate_sta_queue(mvm, queue,
844 						     disable_agg_tids, false);
845 		}
846 	}
847 
848 	ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
849 	inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
850 				     ssn, &cfg, wdg_timeout);
851 	if (inc_ssn) {
852 		ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
853 		le16_add_cpu(&hdr->seq_ctrl, 0x10);
854 	}
855 
856 	/*
857 	 * Mark queue as shared in transport if shared
858 	 * Note this has to be done after queue enablement because enablement
859 	 * can also set this value, and there is no indication there to shared
860 	 * queues
861 	 */
862 	if (shared_queue)
863 		iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
864 
865 	spin_lock_bh(&mvmsta->lock);
866 	/*
867 	 * This looks racy, but it is not. We have only one packet for
868 	 * this ra/tid in our Tx path since we stop the Qdisc when we
869 	 * need to allocate a new TFD queue.
870 	 */
871 	if (inc_ssn)
872 		mvmsta->tid_data[tid].seq_number += 0x10;
873 	mvmsta->tid_data[tid].txq_id = queue;
874 	mvmsta->tid_data[tid].is_tid_active = true;
875 	mvmsta->tfd_queue_msk |= BIT(queue);
876 	queue_state = mvmsta->tid_data[tid].state;
877 
878 	if (mvmsta->reserved_queue == queue)
879 		mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
880 	spin_unlock_bh(&mvmsta->lock);
881 
882 	if (!shared_queue) {
883 		ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
884 		if (ret)
885 			goto out_err;
886 
887 		/* If we need to re-enable aggregations... */
888 		if (queue_state == IWL_AGG_ON) {
889 			ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
890 			if (ret)
891 				goto out_err;
892 		}
893 	} else {
894 		/* Redirect queue, if needed */
895 		ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
896 						 wdg_timeout, false);
897 		if (ret)
898 			goto out_err;
899 	}
900 
901 	return 0;
902 
903 out_err:
904 	iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
905 
906 	return ret;
907 }
908 
909 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
910 {
911 	struct iwl_scd_txq_cfg_cmd cmd = {
912 		.scd_queue = queue,
913 		.action = SCD_CFG_UPDATE_QUEUE_TID,
914 	};
915 	int tid;
916 	unsigned long tid_bitmap;
917 	int ret;
918 
919 	lockdep_assert_held(&mvm->mutex);
920 
921 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
922 		return;
923 
924 	spin_lock_bh(&mvm->queue_info_lock);
925 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
926 	spin_unlock_bh(&mvm->queue_info_lock);
927 
928 	if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
929 		return;
930 
931 	/* Find any TID for queue */
932 	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
933 	cmd.tid = tid;
934 	cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
935 
936 	ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
937 	if (ret) {
938 		IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
939 			queue, ret);
940 		return;
941 	}
942 
943 	spin_lock_bh(&mvm->queue_info_lock);
944 	mvm->queue_info[queue].txq_tid = tid;
945 	spin_unlock_bh(&mvm->queue_info_lock);
946 	IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
947 			    queue, tid);
948 }
949 
950 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
951 {
952 	struct ieee80211_sta *sta;
953 	struct iwl_mvm_sta *mvmsta;
954 	u8 sta_id;
955 	int tid = -1;
956 	unsigned long tid_bitmap;
957 	unsigned int wdg_timeout;
958 	int ssn;
959 	int ret = true;
960 
961 	/* queue sharing is disabled on new TX path */
962 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
963 		return;
964 
965 	lockdep_assert_held(&mvm->mutex);
966 
967 	spin_lock_bh(&mvm->queue_info_lock);
968 	sta_id = mvm->queue_info[queue].ra_sta_id;
969 	tid_bitmap = mvm->queue_info[queue].tid_bitmap;
970 	spin_unlock_bh(&mvm->queue_info_lock);
971 
972 	/* Find TID for queue, and make sure it is the only one on the queue */
973 	tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
974 	if (tid_bitmap != BIT(tid)) {
975 		IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
976 			queue, tid_bitmap);
977 		return;
978 	}
979 
980 	IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
981 			    tid);
982 
983 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
984 					lockdep_is_held(&mvm->mutex));
985 
986 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
987 		return;
988 
989 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
990 	wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
991 
992 	ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
993 
994 	ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
995 					 tid_to_mac80211_ac[tid], ssn,
996 					 wdg_timeout, true);
997 	if (ret) {
998 		IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
999 		return;
1000 	}
1001 
1002 	/* If aggs should be turned back on - do it */
1003 	if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1004 		struct iwl_mvm_add_sta_cmd cmd = {0};
1005 
1006 		mvmsta->tid_disable_agg &= ~BIT(tid);
1007 
1008 		cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1009 		cmd.sta_id = mvmsta->sta_id;
1010 		cmd.add_modify = STA_MODE_MODIFY;
1011 		cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1012 		cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1013 		cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1014 
1015 		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1016 					   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1017 		if (!ret) {
1018 			IWL_DEBUG_TX_QUEUES(mvm,
1019 					    "TXQ #%d is now aggregated again\n",
1020 					    queue);
1021 
1022 			/* Mark queue intenally as aggregating again */
1023 			iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1024 		}
1025 	}
1026 
1027 	spin_lock_bh(&mvm->queue_info_lock);
1028 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1029 	spin_unlock_bh(&mvm->queue_info_lock);
1030 }
1031 
1032 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1033 {
1034 	if (tid == IWL_MAX_TID_COUNT)
1035 		return IEEE80211_AC_VO; /* MGMT */
1036 
1037 	return tid_to_mac80211_ac[tid];
1038 }
1039 
1040 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1041 				       struct ieee80211_sta *sta, int tid)
1042 {
1043 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1044 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1045 	struct sk_buff *skb;
1046 	struct ieee80211_hdr *hdr;
1047 	struct sk_buff_head deferred_tx;
1048 	u8 mac_queue;
1049 	bool no_queue = false; /* Marks if there is a problem with the queue */
1050 	u8 ac;
1051 
1052 	lockdep_assert_held(&mvm->mutex);
1053 
1054 	skb = skb_peek(&tid_data->deferred_tx_frames);
1055 	if (!skb)
1056 		return;
1057 	hdr = (void *)skb->data;
1058 
1059 	ac = iwl_mvm_tid_to_ac_queue(tid);
1060 	mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1061 
1062 	if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1063 	    iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1064 		IWL_ERR(mvm,
1065 			"Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1066 			mvmsta->sta_id, tid);
1067 
1068 		/*
1069 		 * Mark queue as problematic so later the deferred traffic is
1070 		 * freed, as we can do nothing with it
1071 		 */
1072 		no_queue = true;
1073 	}
1074 
1075 	__skb_queue_head_init(&deferred_tx);
1076 
1077 	/* Disable bottom-halves when entering TX path */
1078 	local_bh_disable();
1079 	spin_lock(&mvmsta->lock);
1080 	skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1081 	mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1082 	spin_unlock(&mvmsta->lock);
1083 
1084 	while ((skb = __skb_dequeue(&deferred_tx)))
1085 		if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1086 			ieee80211_free_txskb(mvm->hw, skb);
1087 	local_bh_enable();
1088 
1089 	/* Wake queue */
1090 	iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1091 }
1092 
1093 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1094 {
1095 	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1096 					   add_stream_wk);
1097 	struct ieee80211_sta *sta;
1098 	struct iwl_mvm_sta *mvmsta;
1099 	unsigned long deferred_tid_traffic;
1100 	int queue, sta_id, tid;
1101 
1102 	/* Check inactivity of queues */
1103 	iwl_mvm_inactivity_check(mvm);
1104 
1105 	mutex_lock(&mvm->mutex);
1106 
1107 	/* No queue reconfiguration in TVQM mode */
1108 	if (iwl_mvm_has_new_tx_api(mvm))
1109 		goto alloc_queues;
1110 
1111 	/* Reconfigure queues requiring reconfiguation */
1112 	for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1113 		bool reconfig;
1114 		bool change_owner;
1115 
1116 		spin_lock_bh(&mvm->queue_info_lock);
1117 		reconfig = (mvm->queue_info[queue].status ==
1118 			    IWL_MVM_QUEUE_RECONFIGURING);
1119 
1120 		/*
1121 		 * We need to take into account a situation in which a TXQ was
1122 		 * allocated to TID x, and then turned shared by adding TIDs y
1123 		 * and z. If TID x becomes inactive and is removed from the TXQ,
1124 		 * ownership must be given to one of the remaining TIDs.
1125 		 * This is mainly because if TID x continues - a new queue can't
1126 		 * be allocated for it as long as it is an owner of another TXQ.
1127 		 */
1128 		change_owner = !(mvm->queue_info[queue].tid_bitmap &
1129 				 BIT(mvm->queue_info[queue].txq_tid)) &&
1130 			       (mvm->queue_info[queue].status ==
1131 				IWL_MVM_QUEUE_SHARED);
1132 		spin_unlock_bh(&mvm->queue_info_lock);
1133 
1134 		if (reconfig)
1135 			iwl_mvm_unshare_queue(mvm, queue);
1136 		else if (change_owner)
1137 			iwl_mvm_change_queue_owner(mvm, queue);
1138 	}
1139 
1140 alloc_queues:
1141 	/* Go over all stations with deferred traffic */
1142 	for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1143 			 IWL_MVM_STATION_COUNT) {
1144 		clear_bit(sta_id, mvm->sta_deferred_frames);
1145 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1146 						lockdep_is_held(&mvm->mutex));
1147 		if (IS_ERR_OR_NULL(sta))
1148 			continue;
1149 
1150 		mvmsta = iwl_mvm_sta_from_mac80211(sta);
1151 		deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1152 
1153 		for_each_set_bit(tid, &deferred_tid_traffic,
1154 				 IWL_MAX_TID_COUNT + 1)
1155 			iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1156 	}
1157 
1158 	mutex_unlock(&mvm->mutex);
1159 }
1160 
1161 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1162 				      struct ieee80211_sta *sta,
1163 				      enum nl80211_iftype vif_type)
1164 {
1165 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1166 	int queue;
1167 	bool using_inactive_queue = false, same_sta = false;
1168 
1169 	/* queue reserving is disabled on new TX path */
1170 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1171 		return 0;
1172 
1173 	/*
1174 	 * Check for inactive queues, so we don't reach a situation where we
1175 	 * can't add a STA due to a shortage in queues that doesn't really exist
1176 	 */
1177 	iwl_mvm_inactivity_check(mvm);
1178 
1179 	spin_lock_bh(&mvm->queue_info_lock);
1180 
1181 	/* Make sure we have free resources for this STA */
1182 	if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1183 	    !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1184 	    (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1185 	     IWL_MVM_QUEUE_FREE))
1186 		queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1187 	else
1188 		queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1189 						IWL_MVM_DQA_MIN_DATA_QUEUE,
1190 						IWL_MVM_DQA_MAX_DATA_QUEUE);
1191 	if (queue < 0) {
1192 		spin_unlock_bh(&mvm->queue_info_lock);
1193 		IWL_ERR(mvm, "No available queues for new station\n");
1194 		return -ENOSPC;
1195 	} else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1196 		/*
1197 		 * If this queue is already allocated but inactive we'll need to
1198 		 * first free this queue before enabling it again, we'll mark
1199 		 * it as reserved to make sure no new traffic arrives on it
1200 		 */
1201 		using_inactive_queue = true;
1202 		same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1203 	}
1204 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1205 
1206 	spin_unlock_bh(&mvm->queue_info_lock);
1207 
1208 	mvmsta->reserved_queue = queue;
1209 
1210 	if (using_inactive_queue)
1211 		iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1212 
1213 	IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1214 			    queue, mvmsta->sta_id);
1215 
1216 	return 0;
1217 }
1218 
1219 /*
1220  * In DQA mode, after a HW restart the queues should be allocated as before, in
1221  * order to avoid race conditions when there are shared queues. This function
1222  * does the re-mapping and queue allocation.
1223  *
1224  * Note that re-enabling aggregations isn't done in this function.
1225  */
1226 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1227 						 struct iwl_mvm_sta *mvm_sta)
1228 {
1229 	unsigned int wdg_timeout =
1230 			iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1231 	int i;
1232 	struct iwl_trans_txq_scd_cfg cfg = {
1233 		.sta_id = mvm_sta->sta_id,
1234 		.frame_limit = IWL_FRAME_LIMIT,
1235 	};
1236 
1237 	/* Make sure reserved queue is still marked as such (if allocated) */
1238 	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1239 		mvm->queue_info[mvm_sta->reserved_queue].status =
1240 			IWL_MVM_QUEUE_RESERVED;
1241 
1242 	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1243 		struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1244 		int txq_id = tid_data->txq_id;
1245 		int ac;
1246 		u8 mac_queue;
1247 
1248 		if (txq_id == IWL_MVM_INVALID_QUEUE)
1249 			continue;
1250 
1251 		skb_queue_head_init(&tid_data->deferred_tx_frames);
1252 
1253 		ac = tid_to_mac80211_ac[i];
1254 		mac_queue = mvm_sta->vif->hw_queue[ac];
1255 
1256 		if (iwl_mvm_has_new_tx_api(mvm)) {
1257 			IWL_DEBUG_TX_QUEUES(mvm,
1258 					    "Re-mapping sta %d tid %d\n",
1259 					    mvm_sta->sta_id, i);
1260 			txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1261 							 mvm_sta->sta_id,
1262 							 i, wdg_timeout);
1263 			tid_data->txq_id = txq_id;
1264 
1265 			/*
1266 			 * Since we don't set the seq number after reset, and HW
1267 			 * sets it now, FW reset will cause the seq num to start
1268 			 * at 0 again, so driver will need to update it
1269 			 * internally as well, so it keeps in sync with real val
1270 			 */
1271 			tid_data->seq_number = 0;
1272 		} else {
1273 			u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1274 
1275 			cfg.tid = i;
1276 			cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1277 			cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1278 					 txq_id ==
1279 					 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1280 
1281 			IWL_DEBUG_TX_QUEUES(mvm,
1282 					    "Re-mapping sta %d tid %d to queue %d\n",
1283 					    mvm_sta->sta_id, i, txq_id);
1284 
1285 			iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1286 					   wdg_timeout);
1287 			mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1288 		}
1289 	}
1290 }
1291 
1292 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1293 				      struct iwl_mvm_int_sta *sta,
1294 				      const u8 *addr,
1295 				      u16 mac_id, u16 color)
1296 {
1297 	struct iwl_mvm_add_sta_cmd cmd;
1298 	int ret;
1299 	u32 status = ADD_STA_SUCCESS;
1300 
1301 	lockdep_assert_held(&mvm->mutex);
1302 
1303 	memset(&cmd, 0, sizeof(cmd));
1304 	cmd.sta_id = sta->sta_id;
1305 	cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1306 							     color));
1307 	if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1308 		cmd.station_type = sta->type;
1309 
1310 	if (!iwl_mvm_has_new_tx_api(mvm))
1311 		cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1312 	cmd.tid_disable_tx = cpu_to_le16(0xffff);
1313 
1314 	if (addr)
1315 		memcpy(cmd.addr, addr, ETH_ALEN);
1316 
1317 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1318 					  iwl_mvm_add_sta_cmd_size(mvm),
1319 					  &cmd, &status);
1320 	if (ret)
1321 		return ret;
1322 
1323 	switch (status & IWL_ADD_STA_STATUS_MASK) {
1324 	case ADD_STA_SUCCESS:
1325 		IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1326 		return 0;
1327 	default:
1328 		ret = -EIO;
1329 		IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1330 			status);
1331 		break;
1332 	}
1333 	return ret;
1334 }
1335 
1336 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1337 		    struct ieee80211_vif *vif,
1338 		    struct ieee80211_sta *sta)
1339 {
1340 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1341 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1342 	struct iwl_mvm_rxq_dup_data *dup_data;
1343 	int i, ret, sta_id;
1344 	bool sta_update = false;
1345 	unsigned int sta_flags = 0;
1346 
1347 	lockdep_assert_held(&mvm->mutex);
1348 
1349 	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1350 		sta_id = iwl_mvm_find_free_sta_id(mvm,
1351 						  ieee80211_vif_type_p2p(vif));
1352 	else
1353 		sta_id = mvm_sta->sta_id;
1354 
1355 	if (sta_id == IWL_MVM_INVALID_STA)
1356 		return -ENOSPC;
1357 
1358 	spin_lock_init(&mvm_sta->lock);
1359 
1360 	/* if this is a HW restart re-alloc existing queues */
1361 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1362 		struct iwl_mvm_int_sta tmp_sta = {
1363 			.sta_id = sta_id,
1364 			.type = mvm_sta->sta_type,
1365 		};
1366 
1367 		/*
1368 		 * First add an empty station since allocating
1369 		 * a queue requires a valid station
1370 		 */
1371 		ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1372 						 mvmvif->id, mvmvif->color);
1373 		if (ret)
1374 			goto err;
1375 
1376 		iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1377 		sta_update = true;
1378 		sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1379 		goto update_fw;
1380 	}
1381 
1382 	mvm_sta->sta_id = sta_id;
1383 	mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1384 						      mvmvif->color);
1385 	mvm_sta->vif = vif;
1386 	if (!mvm->trans->cfg->gen2)
1387 		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1388 	else
1389 		mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1390 	mvm_sta->tx_protection = 0;
1391 	mvm_sta->tt_tx_protection = false;
1392 	mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1393 
1394 	/* HW restart, don't assume the memory has been zeroed */
1395 	mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1396 	mvm_sta->tfd_queue_msk = 0;
1397 
1398 	/* for HW restart - reset everything but the sequence number */
1399 	for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1400 		u16 seq = mvm_sta->tid_data[i].seq_number;
1401 		memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1402 		mvm_sta->tid_data[i].seq_number = seq;
1403 
1404 		/*
1405 		 * Mark all queues for this STA as unallocated and defer TX
1406 		 * frames until the queue is allocated
1407 		 */
1408 		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1409 		skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1410 	}
1411 	mvm_sta->deferred_traffic_tid_map = 0;
1412 	mvm_sta->agg_tids = 0;
1413 
1414 	if (iwl_mvm_has_new_rx_api(mvm) &&
1415 	    !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1416 		int q;
1417 
1418 		dup_data = kcalloc(mvm->trans->num_rx_queues,
1419 				   sizeof(*dup_data), GFP_KERNEL);
1420 		if (!dup_data)
1421 			return -ENOMEM;
1422 		/*
1423 		 * Initialize all the last_seq values to 0xffff which can never
1424 		 * compare equal to the frame's seq_ctrl in the check in
1425 		 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1426 		 * number and fragmented packets don't reach that function.
1427 		 *
1428 		 * This thus allows receiving a packet with seqno 0 and the
1429 		 * retry bit set as the very first packet on a new TID.
1430 		 */
1431 		for (q = 0; q < mvm->trans->num_rx_queues; q++)
1432 			memset(dup_data[q].last_seq, 0xff,
1433 			       sizeof(dup_data[q].last_seq));
1434 		mvm_sta->dup_data = dup_data;
1435 	}
1436 
1437 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1438 		ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1439 						 ieee80211_vif_type_p2p(vif));
1440 		if (ret)
1441 			goto err;
1442 	}
1443 
1444 	/*
1445 	 * if rs is registered with mac80211, then "add station" will be handled
1446 	 * via the corresponding ops, otherwise need to notify rate scaling here
1447 	 */
1448 	if (iwl_mvm_has_tlc_offload(mvm))
1449 		iwl_mvm_rs_add_sta(mvm, mvm_sta);
1450 
1451 update_fw:
1452 	ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1453 	if (ret)
1454 		goto err;
1455 
1456 	if (vif->type == NL80211_IFTYPE_STATION) {
1457 		if (!sta->tdls) {
1458 			WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1459 			mvmvif->ap_sta_id = sta_id;
1460 		} else {
1461 			WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1462 		}
1463 	}
1464 
1465 	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1466 
1467 	return 0;
1468 
1469 err:
1470 	return ret;
1471 }
1472 
1473 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1474 		      bool drain)
1475 {
1476 	struct iwl_mvm_add_sta_cmd cmd = {};
1477 	int ret;
1478 	u32 status;
1479 
1480 	lockdep_assert_held(&mvm->mutex);
1481 
1482 	cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1483 	cmd.sta_id = mvmsta->sta_id;
1484 	cmd.add_modify = STA_MODE_MODIFY;
1485 	cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1486 	cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1487 
1488 	status = ADD_STA_SUCCESS;
1489 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1490 					  iwl_mvm_add_sta_cmd_size(mvm),
1491 					  &cmd, &status);
1492 	if (ret)
1493 		return ret;
1494 
1495 	switch (status & IWL_ADD_STA_STATUS_MASK) {
1496 	case ADD_STA_SUCCESS:
1497 		IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1498 			       mvmsta->sta_id);
1499 		break;
1500 	default:
1501 		ret = -EIO;
1502 		IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1503 			mvmsta->sta_id);
1504 		break;
1505 	}
1506 
1507 	return ret;
1508 }
1509 
1510 /*
1511  * Remove a station from the FW table. Before sending the command to remove
1512  * the station validate that the station is indeed known to the driver (sanity
1513  * only).
1514  */
1515 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1516 {
1517 	struct ieee80211_sta *sta;
1518 	struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1519 		.sta_id = sta_id,
1520 	};
1521 	int ret;
1522 
1523 	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1524 					lockdep_is_held(&mvm->mutex));
1525 
1526 	/* Note: internal stations are marked as error values */
1527 	if (!sta) {
1528 		IWL_ERR(mvm, "Invalid station id\n");
1529 		return -EINVAL;
1530 	}
1531 
1532 	ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1533 				   sizeof(rm_sta_cmd), &rm_sta_cmd);
1534 	if (ret) {
1535 		IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1536 		return ret;
1537 	}
1538 
1539 	return 0;
1540 }
1541 
1542 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1543 				       struct ieee80211_vif *vif,
1544 				       struct iwl_mvm_sta *mvm_sta)
1545 {
1546 	int ac;
1547 	int i;
1548 
1549 	lockdep_assert_held(&mvm->mutex);
1550 
1551 	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1552 		if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1553 			continue;
1554 
1555 		ac = iwl_mvm_tid_to_ac_queue(i);
1556 		iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1557 				    vif->hw_queue[ac], i, 0);
1558 		mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1559 	}
1560 }
1561 
1562 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1563 				  struct iwl_mvm_sta *mvm_sta)
1564 {
1565 	int i;
1566 
1567 	for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1568 		u16 txq_id;
1569 		int ret;
1570 
1571 		spin_lock_bh(&mvm_sta->lock);
1572 		txq_id = mvm_sta->tid_data[i].txq_id;
1573 		spin_unlock_bh(&mvm_sta->lock);
1574 
1575 		if (txq_id == IWL_MVM_INVALID_QUEUE)
1576 			continue;
1577 
1578 		ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1579 		if (ret)
1580 			return ret;
1581 	}
1582 
1583 	return 0;
1584 }
1585 
1586 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1587 		   struct ieee80211_vif *vif,
1588 		   struct ieee80211_sta *sta)
1589 {
1590 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1591 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1592 	u8 sta_id = mvm_sta->sta_id;
1593 	int ret;
1594 
1595 	lockdep_assert_held(&mvm->mutex);
1596 
1597 	if (iwl_mvm_has_new_rx_api(mvm))
1598 		kfree(mvm_sta->dup_data);
1599 
1600 	ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1601 	if (ret)
1602 		return ret;
1603 
1604 	/* flush its queues here since we are freeing mvm_sta */
1605 	ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1606 	if (ret)
1607 		return ret;
1608 	if (iwl_mvm_has_new_tx_api(mvm)) {
1609 		ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1610 	} else {
1611 		u32 q_mask = mvm_sta->tfd_queue_msk;
1612 
1613 		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1614 						     q_mask);
1615 	}
1616 	if (ret)
1617 		return ret;
1618 
1619 	ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1620 
1621 	iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1622 
1623 	/* If there is a TXQ still marked as reserved - free it */
1624 	if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1625 		u8 reserved_txq = mvm_sta->reserved_queue;
1626 		enum iwl_mvm_queue_status *status;
1627 
1628 		/*
1629 		 * If no traffic has gone through the reserved TXQ - it
1630 		 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1631 		 * should be manually marked as free again
1632 		 */
1633 		spin_lock_bh(&mvm->queue_info_lock);
1634 		status = &mvm->queue_info[reserved_txq].status;
1635 		if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1636 			 (*status != IWL_MVM_QUEUE_FREE),
1637 			 "sta_id %d reserved txq %d status %d",
1638 			 sta_id, reserved_txq, *status)) {
1639 			spin_unlock_bh(&mvm->queue_info_lock);
1640 			return -EINVAL;
1641 		}
1642 
1643 		*status = IWL_MVM_QUEUE_FREE;
1644 		spin_unlock_bh(&mvm->queue_info_lock);
1645 	}
1646 
1647 	if (vif->type == NL80211_IFTYPE_STATION &&
1648 	    mvmvif->ap_sta_id == sta_id) {
1649 		/* if associated - we can't remove the AP STA now */
1650 		if (vif->bss_conf.assoc)
1651 			return ret;
1652 
1653 		/* unassoc - go ahead - remove the AP STA now */
1654 		mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1655 
1656 		/* clear d0i3_ap_sta_id if no longer relevant */
1657 		if (mvm->d0i3_ap_sta_id == sta_id)
1658 			mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1659 	}
1660 
1661 	/*
1662 	 * This shouldn't happen - the TDLS channel switch should be canceled
1663 	 * before the STA is removed.
1664 	 */
1665 	if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1666 		mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1667 		cancel_delayed_work(&mvm->tdls_cs.dwork);
1668 	}
1669 
1670 	/*
1671 	 * Make sure that the tx response code sees the station as -EBUSY and
1672 	 * calls the drain worker.
1673 	 */
1674 	spin_lock_bh(&mvm_sta->lock);
1675 	spin_unlock_bh(&mvm_sta->lock);
1676 
1677 	ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1678 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1679 
1680 	return ret;
1681 }
1682 
1683 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1684 		      struct ieee80211_vif *vif,
1685 		      u8 sta_id)
1686 {
1687 	int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1688 
1689 	lockdep_assert_held(&mvm->mutex);
1690 
1691 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1692 	return ret;
1693 }
1694 
1695 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1696 			     struct iwl_mvm_int_sta *sta,
1697 			     u32 qmask, enum nl80211_iftype iftype,
1698 			     enum iwl_sta_type type)
1699 {
1700 	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1701 	    sta->sta_id == IWL_MVM_INVALID_STA) {
1702 		sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1703 		if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1704 			return -ENOSPC;
1705 	}
1706 
1707 	sta->tfd_queue_msk = qmask;
1708 	sta->type = type;
1709 
1710 	/* put a non-NULL value so iterating over the stations won't stop */
1711 	rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1712 	return 0;
1713 }
1714 
1715 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1716 {
1717 	RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1718 	memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1719 	sta->sta_id = IWL_MVM_INVALID_STA;
1720 }
1721 
1722 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
1723 					  u8 sta_id, u8 fifo)
1724 {
1725 	unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1726 					mvm->cfg->base_params->wd_timeout :
1727 					IWL_WATCHDOG_DISABLED;
1728 
1729 	if (iwl_mvm_has_new_tx_api(mvm)) {
1730 		int tvqm_queue =
1731 			iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
1732 						IWL_MAX_TID_COUNT,
1733 						wdg_timeout);
1734 		*queue = tvqm_queue;
1735 	} else {
1736 		struct iwl_trans_txq_scd_cfg cfg = {
1737 			.fifo = fifo,
1738 			.sta_id = sta_id,
1739 			.tid = IWL_MAX_TID_COUNT,
1740 			.aggregate = false,
1741 			.frame_limit = IWL_FRAME_LIMIT,
1742 		};
1743 
1744 		iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
1745 	}
1746 }
1747 
1748 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1749 {
1750 	int ret;
1751 
1752 	lockdep_assert_held(&mvm->mutex);
1753 
1754 	/* Allocate aux station and assign to it the aux queue */
1755 	ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1756 				       NL80211_IFTYPE_UNSPECIFIED,
1757 				       IWL_STA_AUX_ACTIVITY);
1758 	if (ret)
1759 		return ret;
1760 
1761 	/* Map Aux queue to fifo - needs to happen before adding Aux station */
1762 	if (!iwl_mvm_has_new_tx_api(mvm))
1763 		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1764 					      mvm->aux_sta.sta_id,
1765 					      IWL_MVM_TX_FIFO_MCAST);
1766 
1767 	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1768 					 MAC_INDEX_AUX, 0);
1769 	if (ret) {
1770 		iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1771 		return ret;
1772 	}
1773 
1774 	/*
1775 	 * For 22000 firmware and on we cannot add queue to a station unknown
1776 	 * to firmware so enable queue here - after the station was added
1777 	 */
1778 	if (iwl_mvm_has_new_tx_api(mvm))
1779 		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1780 					      mvm->aux_sta.sta_id,
1781 					      IWL_MVM_TX_FIFO_MCAST);
1782 
1783 	return 0;
1784 }
1785 
1786 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1787 {
1788 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1789 	int ret;
1790 
1791 	lockdep_assert_held(&mvm->mutex);
1792 
1793 	/* Map snif queue to fifo - must happen before adding snif station */
1794 	if (!iwl_mvm_has_new_tx_api(mvm))
1795 		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1796 					      mvm->snif_sta.sta_id,
1797 					      IWL_MVM_TX_FIFO_BE);
1798 
1799 	ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1800 					 mvmvif->id, 0);
1801 	if (ret)
1802 		return ret;
1803 
1804 	/*
1805 	 * For 22000 firmware and on we cannot add queue to a station unknown
1806 	 * to firmware so enable queue here - after the station was added
1807 	 */
1808 	if (iwl_mvm_has_new_tx_api(mvm))
1809 		iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1810 					      mvm->snif_sta.sta_id,
1811 					      IWL_MVM_TX_FIFO_BE);
1812 
1813 	return 0;
1814 }
1815 
1816 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1817 {
1818 	int ret;
1819 
1820 	lockdep_assert_held(&mvm->mutex);
1821 
1822 	iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
1823 			    IWL_MAX_TID_COUNT, 0);
1824 	ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1825 	if (ret)
1826 		IWL_WARN(mvm, "Failed sending remove station\n");
1827 
1828 	return ret;
1829 }
1830 
1831 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1832 {
1833 	iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1834 }
1835 
1836 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1837 {
1838 	lockdep_assert_held(&mvm->mutex);
1839 
1840 	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1841 }
1842 
1843 /*
1844  * Send the add station command for the vif's broadcast station.
1845  * Assumes that the station was already allocated.
1846  *
1847  * @mvm: the mvm component
1848  * @vif: the interface to which the broadcast station is added
1849  * @bsta: the broadcast station to add.
1850  */
1851 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1852 {
1853 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1854 	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1855 	static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1856 	const u8 *baddr = _baddr;
1857 	int queue;
1858 	int ret;
1859 	unsigned int wdg_timeout =
1860 		iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1861 	struct iwl_trans_txq_scd_cfg cfg = {
1862 		.fifo = IWL_MVM_TX_FIFO_VO,
1863 		.sta_id = mvmvif->bcast_sta.sta_id,
1864 		.tid = IWL_MAX_TID_COUNT,
1865 		.aggregate = false,
1866 		.frame_limit = IWL_FRAME_LIMIT,
1867 	};
1868 
1869 	lockdep_assert_held(&mvm->mutex);
1870 
1871 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1872 		if (vif->type == NL80211_IFTYPE_AP ||
1873 		    vif->type == NL80211_IFTYPE_ADHOC)
1874 			queue = mvm->probe_queue;
1875 		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1876 			queue = mvm->p2p_dev_queue;
1877 		else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1878 			return -EINVAL;
1879 
1880 		bsta->tfd_queue_msk |= BIT(queue);
1881 
1882 		iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1883 				   &cfg, wdg_timeout);
1884 	}
1885 
1886 	if (vif->type == NL80211_IFTYPE_ADHOC)
1887 		baddr = vif->bss_conf.bssid;
1888 
1889 	if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1890 		return -ENOSPC;
1891 
1892 	ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1893 					 mvmvif->id, mvmvif->color);
1894 	if (ret)
1895 		return ret;
1896 
1897 	/*
1898 	 * For 22000 firmware and on we cannot add queue to a station unknown
1899 	 * to firmware so enable queue here - after the station was added
1900 	 */
1901 	if (iwl_mvm_has_new_tx_api(mvm)) {
1902 		queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1903 						bsta->sta_id,
1904 						IWL_MAX_TID_COUNT,
1905 						wdg_timeout);
1906 
1907 		if (vif->type == NL80211_IFTYPE_AP ||
1908 		    vif->type == NL80211_IFTYPE_ADHOC)
1909 			mvm->probe_queue = queue;
1910 		else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1911 			mvm->p2p_dev_queue = queue;
1912 	}
1913 
1914 	return 0;
1915 }
1916 
1917 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1918 					  struct ieee80211_vif *vif)
1919 {
1920 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1921 	int queue;
1922 
1923 	lockdep_assert_held(&mvm->mutex);
1924 
1925 	iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1926 
1927 	switch (vif->type) {
1928 	case NL80211_IFTYPE_AP:
1929 	case NL80211_IFTYPE_ADHOC:
1930 		queue = mvm->probe_queue;
1931 		break;
1932 	case NL80211_IFTYPE_P2P_DEVICE:
1933 		queue = mvm->p2p_dev_queue;
1934 		break;
1935 	default:
1936 		WARN(1, "Can't free bcast queue on vif type %d\n",
1937 		     vif->type);
1938 		return;
1939 	}
1940 
1941 	iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1942 	if (iwl_mvm_has_new_tx_api(mvm))
1943 		return;
1944 
1945 	WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1946 	mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1947 }
1948 
1949 /* Send the FW a request to remove the station from it's internal data
1950  * structures, but DO NOT remove the entry from the local data structures. */
1951 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1952 {
1953 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1954 	int ret;
1955 
1956 	lockdep_assert_held(&mvm->mutex);
1957 
1958 	iwl_mvm_free_bcast_sta_queues(mvm, vif);
1959 
1960 	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1961 	if (ret)
1962 		IWL_WARN(mvm, "Failed sending remove station\n");
1963 	return ret;
1964 }
1965 
1966 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1967 {
1968 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1969 
1970 	lockdep_assert_held(&mvm->mutex);
1971 
1972 	return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1973 					ieee80211_vif_type_p2p(vif),
1974 					IWL_STA_GENERAL_PURPOSE);
1975 }
1976 
1977 /* Allocate a new station entry for the broadcast station to the given vif,
1978  * and send it to the FW.
1979  * Note that each P2P mac should have its own broadcast station.
1980  *
1981  * @mvm: the mvm component
1982  * @vif: the interface to which the broadcast station is added
1983  * @bsta: the broadcast station to add. */
1984 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1985 {
1986 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1987 	struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1988 	int ret;
1989 
1990 	lockdep_assert_held(&mvm->mutex);
1991 
1992 	ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1993 	if (ret)
1994 		return ret;
1995 
1996 	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1997 
1998 	if (ret)
1999 		iwl_mvm_dealloc_int_sta(mvm, bsta);
2000 
2001 	return ret;
2002 }
2003 
2004 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2005 {
2006 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2007 
2008 	iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2009 }
2010 
2011 /*
2012  * Send the FW a request to remove the station from it's internal data
2013  * structures, and in addition remove it from the local data structure.
2014  */
2015 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2016 {
2017 	int ret;
2018 
2019 	lockdep_assert_held(&mvm->mutex);
2020 
2021 	ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2022 
2023 	iwl_mvm_dealloc_bcast_sta(mvm, vif);
2024 
2025 	return ret;
2026 }
2027 
2028 /*
2029  * Allocate a new station entry for the multicast station to the given vif,
2030  * and send it to the FW.
2031  * Note that each AP/GO mac should have its own multicast station.
2032  *
2033  * @mvm: the mvm component
2034  * @vif: the interface to which the multicast station is added
2035  */
2036 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2037 {
2038 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2039 	struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2040 	static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2041 	const u8 *maddr = _maddr;
2042 	struct iwl_trans_txq_scd_cfg cfg = {
2043 		.fifo = IWL_MVM_TX_FIFO_MCAST,
2044 		.sta_id = msta->sta_id,
2045 		.tid = 0,
2046 		.aggregate = false,
2047 		.frame_limit = IWL_FRAME_LIMIT,
2048 	};
2049 	unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2050 	int ret;
2051 
2052 	lockdep_assert_held(&mvm->mutex);
2053 
2054 	if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2055 		    vif->type != NL80211_IFTYPE_ADHOC))
2056 		return -ENOTSUPP;
2057 
2058 	/*
2059 	 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2060 	 * invalid, so make sure we use the queue we want.
2061 	 * Note that this is done here as we want to avoid making DQA
2062 	 * changes in mac80211 layer.
2063 	 */
2064 	if (vif->type == NL80211_IFTYPE_ADHOC) {
2065 		vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2066 		mvmvif->cab_queue = vif->cab_queue;
2067 	}
2068 
2069 	/*
2070 	 * While in previous FWs we had to exclude cab queue from TFD queue
2071 	 * mask, now it is needed as any other queue.
2072 	 */
2073 	if (!iwl_mvm_has_new_tx_api(mvm) &&
2074 	    fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2075 		iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2076 				   &cfg, timeout);
2077 		msta->tfd_queue_msk |= BIT(vif->cab_queue);
2078 	}
2079 	ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2080 					 mvmvif->id, mvmvif->color);
2081 	if (ret) {
2082 		iwl_mvm_dealloc_int_sta(mvm, msta);
2083 		return ret;
2084 	}
2085 
2086 	/*
2087 	 * Enable cab queue after the ADD_STA command is sent.
2088 	 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2089 	 * command with unknown station id, and for FW that doesn't support
2090 	 * station API since the cab queue is not included in the
2091 	 * tfd_queue_mask.
2092 	 */
2093 	if (iwl_mvm_has_new_tx_api(mvm)) {
2094 		int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2095 						    msta->sta_id,
2096 						    0,
2097 						    timeout);
2098 		mvmvif->cab_queue = queue;
2099 	} else if (!fw_has_api(&mvm->fw->ucode_capa,
2100 			       IWL_UCODE_TLV_API_STA_TYPE))
2101 		iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2102 				   &cfg, timeout);
2103 
2104 	return 0;
2105 }
2106 
2107 /*
2108  * Send the FW a request to remove the station from it's internal data
2109  * structures, and in addition remove it from the local data structure.
2110  */
2111 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2112 {
2113 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2114 	int ret;
2115 
2116 	lockdep_assert_held(&mvm->mutex);
2117 
2118 	iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2119 
2120 	iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2121 			    0, 0);
2122 
2123 	ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2124 	if (ret)
2125 		IWL_WARN(mvm, "Failed sending remove station\n");
2126 
2127 	return ret;
2128 }
2129 
2130 #define IWL_MAX_RX_BA_SESSIONS 16
2131 
2132 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2133 {
2134 	struct iwl_mvm_delba_notif notif = {
2135 		.metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2136 		.metadata.sync = 1,
2137 		.delba.baid = baid,
2138 	};
2139 	iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2140 };
2141 
2142 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2143 				 struct iwl_mvm_baid_data *data)
2144 {
2145 	int i;
2146 
2147 	iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2148 
2149 	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2150 		int j;
2151 		struct iwl_mvm_reorder_buffer *reorder_buf =
2152 			&data->reorder_buf[i];
2153 		struct iwl_mvm_reorder_buf_entry *entries =
2154 			&data->entries[i * data->entries_per_queue];
2155 
2156 		spin_lock_bh(&reorder_buf->lock);
2157 		if (likely(!reorder_buf->num_stored)) {
2158 			spin_unlock_bh(&reorder_buf->lock);
2159 			continue;
2160 		}
2161 
2162 		/*
2163 		 * This shouldn't happen in regular DELBA since the internal
2164 		 * delBA notification should trigger a release of all frames in
2165 		 * the reorder buffer.
2166 		 */
2167 		WARN_ON(1);
2168 
2169 		for (j = 0; j < reorder_buf->buf_size; j++)
2170 			__skb_queue_purge(&entries[j].e.frames);
2171 		/*
2172 		 * Prevent timer re-arm. This prevents a very far fetched case
2173 		 * where we timed out on the notification. There may be prior
2174 		 * RX frames pending in the RX queue before the notification
2175 		 * that might get processed between now and the actual deletion
2176 		 * and we would re-arm the timer although we are deleting the
2177 		 * reorder buffer.
2178 		 */
2179 		reorder_buf->removed = true;
2180 		spin_unlock_bh(&reorder_buf->lock);
2181 		del_timer_sync(&reorder_buf->reorder_timer);
2182 	}
2183 }
2184 
2185 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2186 					struct iwl_mvm_baid_data *data,
2187 					u16 ssn, u16 buf_size)
2188 {
2189 	int i;
2190 
2191 	for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2192 		struct iwl_mvm_reorder_buffer *reorder_buf =
2193 			&data->reorder_buf[i];
2194 		struct iwl_mvm_reorder_buf_entry *entries =
2195 			&data->entries[i * data->entries_per_queue];
2196 		int j;
2197 
2198 		reorder_buf->num_stored = 0;
2199 		reorder_buf->head_sn = ssn;
2200 		reorder_buf->buf_size = buf_size;
2201 		/* rx reorder timer */
2202 		timer_setup(&reorder_buf->reorder_timer,
2203 			    iwl_mvm_reorder_timer_expired, 0);
2204 		spin_lock_init(&reorder_buf->lock);
2205 		reorder_buf->mvm = mvm;
2206 		reorder_buf->queue = i;
2207 		reorder_buf->valid = false;
2208 		for (j = 0; j < reorder_buf->buf_size; j++)
2209 			__skb_queue_head_init(&entries[j].e.frames);
2210 	}
2211 }
2212 
2213 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2214 		       int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2215 {
2216 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2217 	struct iwl_mvm_add_sta_cmd cmd = {};
2218 	struct iwl_mvm_baid_data *baid_data = NULL;
2219 	int ret;
2220 	u32 status;
2221 
2222 	lockdep_assert_held(&mvm->mutex);
2223 
2224 	if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2225 		IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2226 		return -ENOSPC;
2227 	}
2228 
2229 	if (iwl_mvm_has_new_rx_api(mvm) && start) {
2230 		u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2231 
2232 		/* sparse doesn't like the __align() so don't check */
2233 #ifndef __CHECKER__
2234 		/*
2235 		 * The division below will be OK if either the cache line size
2236 		 * can be divided by the entry size (ALIGN will round up) or if
2237 		 * if the entry size can be divided by the cache line size, in
2238 		 * which case the ALIGN() will do nothing.
2239 		 */
2240 		BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2241 			     sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2242 #endif
2243 
2244 		/*
2245 		 * Upward align the reorder buffer size to fill an entire cache
2246 		 * line for each queue, to avoid sharing cache lines between
2247 		 * different queues.
2248 		 */
2249 		reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2250 
2251 		/*
2252 		 * Allocate here so if allocation fails we can bail out early
2253 		 * before starting the BA session in the firmware
2254 		 */
2255 		baid_data = kzalloc(sizeof(*baid_data) +
2256 				    mvm->trans->num_rx_queues *
2257 				    reorder_buf_size,
2258 				    GFP_KERNEL);
2259 		if (!baid_data)
2260 			return -ENOMEM;
2261 
2262 		/*
2263 		 * This division is why we need the above BUILD_BUG_ON(),
2264 		 * if that doesn't hold then this will not be right.
2265 		 */
2266 		baid_data->entries_per_queue =
2267 			reorder_buf_size / sizeof(baid_data->entries[0]);
2268 	}
2269 
2270 	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2271 	cmd.sta_id = mvm_sta->sta_id;
2272 	cmd.add_modify = STA_MODE_MODIFY;
2273 	if (start) {
2274 		cmd.add_immediate_ba_tid = (u8) tid;
2275 		cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2276 		cmd.rx_ba_window = cpu_to_le16(buf_size);
2277 	} else {
2278 		cmd.remove_immediate_ba_tid = (u8) tid;
2279 	}
2280 	cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2281 				  STA_MODIFY_REMOVE_BA_TID;
2282 
2283 	status = ADD_STA_SUCCESS;
2284 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2285 					  iwl_mvm_add_sta_cmd_size(mvm),
2286 					  &cmd, &status);
2287 	if (ret)
2288 		goto out_free;
2289 
2290 	switch (status & IWL_ADD_STA_STATUS_MASK) {
2291 	case ADD_STA_SUCCESS:
2292 		IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2293 			     start ? "start" : "stopp");
2294 		break;
2295 	case ADD_STA_IMMEDIATE_BA_FAILURE:
2296 		IWL_WARN(mvm, "RX BA Session refused by fw\n");
2297 		ret = -ENOSPC;
2298 		break;
2299 	default:
2300 		ret = -EIO;
2301 		IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2302 			start ? "start" : "stopp", status);
2303 		break;
2304 	}
2305 
2306 	if (ret)
2307 		goto out_free;
2308 
2309 	if (start) {
2310 		u8 baid;
2311 
2312 		mvm->rx_ba_sessions++;
2313 
2314 		if (!iwl_mvm_has_new_rx_api(mvm))
2315 			return 0;
2316 
2317 		if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2318 			ret = -EINVAL;
2319 			goto out_free;
2320 		}
2321 		baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2322 			    IWL_ADD_STA_BAID_SHIFT);
2323 		baid_data->baid = baid;
2324 		baid_data->timeout = timeout;
2325 		baid_data->last_rx = jiffies;
2326 		baid_data->rcu_ptr = &mvm->baid_map[baid];
2327 		timer_setup(&baid_data->session_timer,
2328 			    iwl_mvm_rx_agg_session_expired, 0);
2329 		baid_data->mvm = mvm;
2330 		baid_data->tid = tid;
2331 		baid_data->sta_id = mvm_sta->sta_id;
2332 
2333 		mvm_sta->tid_to_baid[tid] = baid;
2334 		if (timeout)
2335 			mod_timer(&baid_data->session_timer,
2336 				  TU_TO_EXP_TIME(timeout * 2));
2337 
2338 		iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2339 		/*
2340 		 * protect the BA data with RCU to cover a case where our
2341 		 * internal RX sync mechanism will timeout (not that it's
2342 		 * supposed to happen) and we will free the session data while
2343 		 * RX is being processed in parallel
2344 		 */
2345 		IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2346 			     mvm_sta->sta_id, tid, baid);
2347 		WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2348 		rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2349 	} else  {
2350 		u8 baid = mvm_sta->tid_to_baid[tid];
2351 
2352 		if (mvm->rx_ba_sessions > 0)
2353 			/* check that restart flow didn't zero the counter */
2354 			mvm->rx_ba_sessions--;
2355 		if (!iwl_mvm_has_new_rx_api(mvm))
2356 			return 0;
2357 
2358 		if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2359 			return -EINVAL;
2360 
2361 		baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2362 		if (WARN_ON(!baid_data))
2363 			return -EINVAL;
2364 
2365 		/* synchronize all rx queues so we can safely delete */
2366 		iwl_mvm_free_reorder(mvm, baid_data);
2367 		del_timer_sync(&baid_data->session_timer);
2368 		RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2369 		kfree_rcu(baid_data, rcu_head);
2370 		IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2371 	}
2372 	return 0;
2373 
2374 out_free:
2375 	kfree(baid_data);
2376 	return ret;
2377 }
2378 
2379 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2380 		       int tid, u8 queue, bool start)
2381 {
2382 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2383 	struct iwl_mvm_add_sta_cmd cmd = {};
2384 	int ret;
2385 	u32 status;
2386 
2387 	lockdep_assert_held(&mvm->mutex);
2388 
2389 	if (start) {
2390 		mvm_sta->tfd_queue_msk |= BIT(queue);
2391 		mvm_sta->tid_disable_agg &= ~BIT(tid);
2392 	} else {
2393 		/* In DQA-mode the queue isn't removed on agg termination */
2394 		mvm_sta->tid_disable_agg |= BIT(tid);
2395 	}
2396 
2397 	cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2398 	cmd.sta_id = mvm_sta->sta_id;
2399 	cmd.add_modify = STA_MODE_MODIFY;
2400 	if (!iwl_mvm_has_new_tx_api(mvm))
2401 		cmd.modify_mask = STA_MODIFY_QUEUES;
2402 	cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2403 	cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2404 	cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2405 
2406 	status = ADD_STA_SUCCESS;
2407 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2408 					  iwl_mvm_add_sta_cmd_size(mvm),
2409 					  &cmd, &status);
2410 	if (ret)
2411 		return ret;
2412 
2413 	switch (status & IWL_ADD_STA_STATUS_MASK) {
2414 	case ADD_STA_SUCCESS:
2415 		break;
2416 	default:
2417 		ret = -EIO;
2418 		IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2419 			start ? "start" : "stopp", status);
2420 		break;
2421 	}
2422 
2423 	return ret;
2424 }
2425 
2426 const u8 tid_to_mac80211_ac[] = {
2427 	IEEE80211_AC_BE,
2428 	IEEE80211_AC_BK,
2429 	IEEE80211_AC_BK,
2430 	IEEE80211_AC_BE,
2431 	IEEE80211_AC_VI,
2432 	IEEE80211_AC_VI,
2433 	IEEE80211_AC_VO,
2434 	IEEE80211_AC_VO,
2435 	IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2436 };
2437 
2438 static const u8 tid_to_ucode_ac[] = {
2439 	AC_BE,
2440 	AC_BK,
2441 	AC_BK,
2442 	AC_BE,
2443 	AC_VI,
2444 	AC_VI,
2445 	AC_VO,
2446 	AC_VO,
2447 };
2448 
2449 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2450 			     struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2451 {
2452 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2453 	struct iwl_mvm_tid_data *tid_data;
2454 	u16 normalized_ssn;
2455 	int txq_id;
2456 	int ret;
2457 
2458 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2459 		return -EINVAL;
2460 
2461 	if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2462 	    mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2463 		IWL_ERR(mvm,
2464 			"Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2465 			mvmsta->tid_data[tid].state);
2466 		return -ENXIO;
2467 	}
2468 
2469 	lockdep_assert_held(&mvm->mutex);
2470 
2471 	if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2472 	    iwl_mvm_has_new_tx_api(mvm)) {
2473 		u8 ac = tid_to_mac80211_ac[tid];
2474 
2475 		ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2476 		if (ret)
2477 			return ret;
2478 	}
2479 
2480 	spin_lock_bh(&mvmsta->lock);
2481 
2482 	/* possible race condition - we entered D0i3 while starting agg */
2483 	if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2484 		spin_unlock_bh(&mvmsta->lock);
2485 		IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2486 		return -EIO;
2487 	}
2488 
2489 	spin_lock(&mvm->queue_info_lock);
2490 
2491 	/*
2492 	 * Note the possible cases:
2493 	 *  1. An enabled TXQ - TXQ needs to become agg'ed
2494 	 *  2. The TXQ hasn't yet been enabled, so find a free one and mark
2495 	 *	it as reserved
2496 	 */
2497 	txq_id = mvmsta->tid_data[tid].txq_id;
2498 	if (txq_id == IWL_MVM_INVALID_QUEUE) {
2499 		txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2500 						 IWL_MVM_DQA_MIN_DATA_QUEUE,
2501 						 IWL_MVM_DQA_MAX_DATA_QUEUE);
2502 		if (txq_id < 0) {
2503 			ret = txq_id;
2504 			IWL_ERR(mvm, "Failed to allocate agg queue\n");
2505 			goto release_locks;
2506 		}
2507 
2508 		/* TXQ hasn't yet been enabled, so mark it only as reserved */
2509 		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2510 	} else if (unlikely(mvm->queue_info[txq_id].status ==
2511 			    IWL_MVM_QUEUE_SHARED)) {
2512 		ret = -ENXIO;
2513 		IWL_DEBUG_TX_QUEUES(mvm,
2514 				    "Can't start tid %d agg on shared queue!\n",
2515 				    tid);
2516 		goto release_locks;
2517 	}
2518 
2519 	spin_unlock(&mvm->queue_info_lock);
2520 
2521 	IWL_DEBUG_TX_QUEUES(mvm,
2522 			    "AGG for tid %d will be on queue #%d\n",
2523 			    tid, txq_id);
2524 
2525 	tid_data = &mvmsta->tid_data[tid];
2526 	tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2527 	tid_data->txq_id = txq_id;
2528 	*ssn = tid_data->ssn;
2529 
2530 	IWL_DEBUG_TX_QUEUES(mvm,
2531 			    "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2532 			    mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2533 			    tid_data->next_reclaimed);
2534 
2535 	/*
2536 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2537 	 * to align the wrap around of ssn so we compare relevant values.
2538 	 */
2539 	normalized_ssn = tid_data->ssn;
2540 	if (mvm->trans->cfg->gen2)
2541 		normalized_ssn &= 0xff;
2542 
2543 	if (normalized_ssn == tid_data->next_reclaimed) {
2544 		tid_data->state = IWL_AGG_STARTING;
2545 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2546 	} else {
2547 		tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2548 	}
2549 
2550 	ret = 0;
2551 	goto out;
2552 
2553 release_locks:
2554 	spin_unlock(&mvm->queue_info_lock);
2555 out:
2556 	spin_unlock_bh(&mvmsta->lock);
2557 
2558 	return ret;
2559 }
2560 
2561 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2562 			    struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2563 			    bool amsdu)
2564 {
2565 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2566 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2567 	unsigned int wdg_timeout =
2568 		iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2569 	int queue, ret;
2570 	bool alloc_queue = true;
2571 	enum iwl_mvm_queue_status queue_status;
2572 	u16 ssn;
2573 
2574 	struct iwl_trans_txq_scd_cfg cfg = {
2575 		.sta_id = mvmsta->sta_id,
2576 		.tid = tid,
2577 		.frame_limit = buf_size,
2578 		.aggregate = true,
2579 	};
2580 
2581 	/*
2582 	 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2583 	 * manager, so this function should never be called in this case.
2584 	 */
2585 	if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2586 		return -EINVAL;
2587 
2588 	BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2589 		     != IWL_MAX_TID_COUNT);
2590 
2591 	spin_lock_bh(&mvmsta->lock);
2592 	ssn = tid_data->ssn;
2593 	queue = tid_data->txq_id;
2594 	tid_data->state = IWL_AGG_ON;
2595 	mvmsta->agg_tids |= BIT(tid);
2596 	tid_data->ssn = 0xffff;
2597 	tid_data->amsdu_in_ampdu_allowed = amsdu;
2598 	spin_unlock_bh(&mvmsta->lock);
2599 
2600 	if (iwl_mvm_has_new_tx_api(mvm)) {
2601 		/*
2602 		 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2603 		 * would have failed, so if we are here there is no need to
2604 		 * allocate a queue.
2605 		 * However, if aggregation size is different than the default
2606 		 * size, the scheduler should be reconfigured.
2607 		 * We cannot do this with the new TX API, so return unsupported
2608 		 * for now, until it will be offloaded to firmware..
2609 		 * Note that if SCD default value changes - this condition
2610 		 * should be updated as well.
2611 		 */
2612 		if (buf_size < IWL_FRAME_LIMIT)
2613 			return -ENOTSUPP;
2614 
2615 		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2616 		if (ret)
2617 			return -EIO;
2618 		goto out;
2619 	}
2620 
2621 	cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2622 
2623 	spin_lock_bh(&mvm->queue_info_lock);
2624 	queue_status = mvm->queue_info[queue].status;
2625 	spin_unlock_bh(&mvm->queue_info_lock);
2626 
2627 	/* Maybe there is no need to even alloc a queue... */
2628 	if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2629 		alloc_queue = false;
2630 
2631 	/*
2632 	 * Only reconfig the SCD for the queue if the window size has
2633 	 * changed from current (become smaller)
2634 	 */
2635 	if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2636 		/*
2637 		 * If reconfiguring an existing queue, it first must be
2638 		 * drained
2639 		 */
2640 		ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2641 						     BIT(queue));
2642 		if (ret) {
2643 			IWL_ERR(mvm,
2644 				"Error draining queue before reconfig\n");
2645 			return ret;
2646 		}
2647 
2648 		ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2649 					   mvmsta->sta_id, tid,
2650 					   buf_size, ssn);
2651 		if (ret) {
2652 			IWL_ERR(mvm,
2653 				"Error reconfiguring TXQ #%d\n", queue);
2654 			return ret;
2655 		}
2656 	}
2657 
2658 	if (alloc_queue)
2659 		iwl_mvm_enable_txq(mvm, queue,
2660 				   vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2661 				   &cfg, wdg_timeout);
2662 
2663 	/* Send ADD_STA command to enable aggs only if the queue isn't shared */
2664 	if (queue_status != IWL_MVM_QUEUE_SHARED) {
2665 		ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2666 		if (ret)
2667 			return -EIO;
2668 	}
2669 
2670 	/* No need to mark as reserved */
2671 	spin_lock_bh(&mvm->queue_info_lock);
2672 	mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2673 	spin_unlock_bh(&mvm->queue_info_lock);
2674 
2675 out:
2676 	/*
2677 	 * Even though in theory the peer could have different
2678 	 * aggregation reorder buffer sizes for different sessions,
2679 	 * our ucode doesn't allow for that and has a global limit
2680 	 * for each station. Therefore, use the minimum of all the
2681 	 * aggregation sessions and our default value.
2682 	 */
2683 	mvmsta->max_agg_bufsize =
2684 		min(mvmsta->max_agg_bufsize, buf_size);
2685 	mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2686 
2687 	IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2688 		     sta->addr, tid);
2689 
2690 	return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
2691 }
2692 
2693 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2694 					struct iwl_mvm_sta *mvmsta,
2695 					struct iwl_mvm_tid_data *tid_data)
2696 {
2697 	u16 txq_id = tid_data->txq_id;
2698 
2699 	if (iwl_mvm_has_new_tx_api(mvm))
2700 		return;
2701 
2702 	spin_lock_bh(&mvm->queue_info_lock);
2703 	/*
2704 	 * The TXQ is marked as reserved only if no traffic came through yet
2705 	 * This means no traffic has been sent on this TID (agg'd or not), so
2706 	 * we no longer have use for the queue. Since it hasn't even been
2707 	 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2708 	 * free.
2709 	 */
2710 	if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
2711 		mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2712 		tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
2713 	}
2714 
2715 	spin_unlock_bh(&mvm->queue_info_lock);
2716 }
2717 
2718 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2719 			    struct ieee80211_sta *sta, u16 tid)
2720 {
2721 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2722 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2723 	u16 txq_id;
2724 	int err;
2725 
2726 	/*
2727 	 * If mac80211 is cleaning its state, then say that we finished since
2728 	 * our state has been cleared anyway.
2729 	 */
2730 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2731 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2732 		return 0;
2733 	}
2734 
2735 	spin_lock_bh(&mvmsta->lock);
2736 
2737 	txq_id = tid_data->txq_id;
2738 
2739 	IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2740 			    mvmsta->sta_id, tid, txq_id, tid_data->state);
2741 
2742 	mvmsta->agg_tids &= ~BIT(tid);
2743 
2744 	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2745 
2746 	switch (tid_data->state) {
2747 	case IWL_AGG_ON:
2748 		tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2749 
2750 		IWL_DEBUG_TX_QUEUES(mvm,
2751 				    "ssn = %d, next_recl = %d\n",
2752 				    tid_data->ssn, tid_data->next_reclaimed);
2753 
2754 		tid_data->ssn = 0xffff;
2755 		tid_data->state = IWL_AGG_OFF;
2756 		spin_unlock_bh(&mvmsta->lock);
2757 
2758 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2759 
2760 		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2761 		return 0;
2762 	case IWL_AGG_STARTING:
2763 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
2764 		/*
2765 		 * The agg session has been stopped before it was set up. This
2766 		 * can happen when the AddBA timer times out for example.
2767 		 */
2768 
2769 		/* No barriers since we are under mutex */
2770 		lockdep_assert_held(&mvm->mutex);
2771 
2772 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2773 		tid_data->state = IWL_AGG_OFF;
2774 		err = 0;
2775 		break;
2776 	default:
2777 		IWL_ERR(mvm,
2778 			"Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2779 			mvmsta->sta_id, tid, tid_data->state);
2780 		IWL_ERR(mvm,
2781 			"\ttid_data->txq_id = %d\n", tid_data->txq_id);
2782 		err = -EINVAL;
2783 	}
2784 
2785 	spin_unlock_bh(&mvmsta->lock);
2786 
2787 	return err;
2788 }
2789 
2790 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2791 			    struct ieee80211_sta *sta, u16 tid)
2792 {
2793 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2794 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2795 	u16 txq_id;
2796 	enum iwl_mvm_agg_state old_state;
2797 
2798 	/*
2799 	 * First set the agg state to OFF to avoid calling
2800 	 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2801 	 */
2802 	spin_lock_bh(&mvmsta->lock);
2803 	txq_id = tid_data->txq_id;
2804 	IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2805 			    mvmsta->sta_id, tid, txq_id, tid_data->state);
2806 	old_state = tid_data->state;
2807 	tid_data->state = IWL_AGG_OFF;
2808 	mvmsta->agg_tids &= ~BIT(tid);
2809 	spin_unlock_bh(&mvmsta->lock);
2810 
2811 	iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2812 
2813 	if (old_state >= IWL_AGG_ON) {
2814 		iwl_mvm_drain_sta(mvm, mvmsta, true);
2815 
2816 		if (iwl_mvm_has_new_tx_api(mvm)) {
2817 			if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2818 						   BIT(tid), 0))
2819 				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2820 			iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2821 		} else {
2822 			if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2823 				IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2824 			iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2825 		}
2826 
2827 		iwl_mvm_drain_sta(mvm, mvmsta, false);
2828 
2829 		iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2830 	}
2831 
2832 	return 0;
2833 }
2834 
2835 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2836 {
2837 	int i, max = -1, max_offs = -1;
2838 
2839 	lockdep_assert_held(&mvm->mutex);
2840 
2841 	/* Pick the unused key offset with the highest 'deleted'
2842 	 * counter. Every time a key is deleted, all the counters
2843 	 * are incremented and the one that was just deleted is
2844 	 * reset to zero. Thus, the highest counter is the one
2845 	 * that was deleted longest ago. Pick that one.
2846 	 */
2847 	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2848 		if (test_bit(i, mvm->fw_key_table))
2849 			continue;
2850 		if (mvm->fw_key_deleted[i] > max) {
2851 			max = mvm->fw_key_deleted[i];
2852 			max_offs = i;
2853 		}
2854 	}
2855 
2856 	if (max_offs < 0)
2857 		return STA_KEY_IDX_INVALID;
2858 
2859 	return max_offs;
2860 }
2861 
2862 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2863 					       struct ieee80211_vif *vif,
2864 					       struct ieee80211_sta *sta)
2865 {
2866 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2867 
2868 	if (sta)
2869 		return iwl_mvm_sta_from_mac80211(sta);
2870 
2871 	/*
2872 	 * The device expects GTKs for station interfaces to be
2873 	 * installed as GTKs for the AP station. If we have no
2874 	 * station ID, then use AP's station ID.
2875 	 */
2876 	if (vif->type == NL80211_IFTYPE_STATION &&
2877 	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2878 		u8 sta_id = mvmvif->ap_sta_id;
2879 
2880 		sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2881 					    lockdep_is_held(&mvm->mutex));
2882 
2883 		/*
2884 		 * It is possible that the 'sta' parameter is NULL,
2885 		 * for example when a GTK is removed - the sta_id will then
2886 		 * be the AP ID, and no station was passed by mac80211.
2887 		 */
2888 		if (IS_ERR_OR_NULL(sta))
2889 			return NULL;
2890 
2891 		return iwl_mvm_sta_from_mac80211(sta);
2892 	}
2893 
2894 	return NULL;
2895 }
2896 
2897 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2898 				u32 sta_id,
2899 				struct ieee80211_key_conf *key, bool mcast,
2900 				u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2901 				u8 key_offset, bool mfp)
2902 {
2903 	union {
2904 		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2905 		struct iwl_mvm_add_sta_key_cmd cmd;
2906 	} u = {};
2907 	__le16 key_flags;
2908 	int ret;
2909 	u32 status;
2910 	u16 keyidx;
2911 	u64 pn = 0;
2912 	int i, size;
2913 	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2914 				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2915 
2916 	if (sta_id == IWL_MVM_INVALID_STA)
2917 		return -EINVAL;
2918 
2919 	keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2920 		 STA_KEY_FLG_KEYID_MSK;
2921 	key_flags = cpu_to_le16(keyidx);
2922 	key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2923 
2924 	switch (key->cipher) {
2925 	case WLAN_CIPHER_SUITE_TKIP:
2926 		key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2927 		if (new_api) {
2928 			memcpy((void *)&u.cmd.tx_mic_key,
2929 			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2930 			       IWL_MIC_KEY_SIZE);
2931 
2932 			memcpy((void *)&u.cmd.rx_mic_key,
2933 			       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2934 			       IWL_MIC_KEY_SIZE);
2935 			pn = atomic64_read(&key->tx_pn);
2936 
2937 		} else {
2938 			u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2939 			for (i = 0; i < 5; i++)
2940 				u.cmd_v1.tkip_rx_ttak[i] =
2941 					cpu_to_le16(tkip_p1k[i]);
2942 		}
2943 		memcpy(u.cmd.common.key, key->key, key->keylen);
2944 		break;
2945 	case WLAN_CIPHER_SUITE_CCMP:
2946 		key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2947 		memcpy(u.cmd.common.key, key->key, key->keylen);
2948 		if (new_api)
2949 			pn = atomic64_read(&key->tx_pn);
2950 		break;
2951 	case WLAN_CIPHER_SUITE_WEP104:
2952 		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2953 		/* fall through */
2954 	case WLAN_CIPHER_SUITE_WEP40:
2955 		key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2956 		memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2957 		break;
2958 	case WLAN_CIPHER_SUITE_GCMP_256:
2959 		key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2960 		/* fall through */
2961 	case WLAN_CIPHER_SUITE_GCMP:
2962 		key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2963 		memcpy(u.cmd.common.key, key->key, key->keylen);
2964 		if (new_api)
2965 			pn = atomic64_read(&key->tx_pn);
2966 		break;
2967 	default:
2968 		key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2969 		memcpy(u.cmd.common.key, key->key, key->keylen);
2970 	}
2971 
2972 	if (mcast)
2973 		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2974 	if (mfp)
2975 		key_flags |= cpu_to_le16(STA_KEY_MFP);
2976 
2977 	u.cmd.common.key_offset = key_offset;
2978 	u.cmd.common.key_flags = key_flags;
2979 	u.cmd.common.sta_id = sta_id;
2980 
2981 	if (new_api) {
2982 		u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2983 		size = sizeof(u.cmd);
2984 	} else {
2985 		size = sizeof(u.cmd_v1);
2986 	}
2987 
2988 	status = ADD_STA_SUCCESS;
2989 	if (cmd_flags & CMD_ASYNC)
2990 		ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
2991 					   &u.cmd);
2992 	else
2993 		ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
2994 						  &u.cmd, &status);
2995 
2996 	switch (status) {
2997 	case ADD_STA_SUCCESS:
2998 		IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2999 		break;
3000 	default:
3001 		ret = -EIO;
3002 		IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3003 		break;
3004 	}
3005 
3006 	return ret;
3007 }
3008 
3009 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3010 				 struct ieee80211_key_conf *keyconf,
3011 				 u8 sta_id, bool remove_key)
3012 {
3013 	struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3014 
3015 	/* verify the key details match the required command's expectations */
3016 	if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3017 		    (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3018 		    (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3019 		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3020 		     keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3021 		return -EINVAL;
3022 
3023 	if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3024 		    keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3025 		return -EINVAL;
3026 
3027 	igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3028 	igtk_cmd.sta_id = cpu_to_le32(sta_id);
3029 
3030 	if (remove_key) {
3031 		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3032 	} else {
3033 		struct ieee80211_key_seq seq;
3034 		const u8 *pn;
3035 
3036 		switch (keyconf->cipher) {
3037 		case WLAN_CIPHER_SUITE_AES_CMAC:
3038 			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3039 			break;
3040 		case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3041 		case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3042 			igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3043 			break;
3044 		default:
3045 			return -EINVAL;
3046 		}
3047 
3048 		memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3049 		if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3050 			igtk_cmd.ctrl_flags |=
3051 				cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3052 		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3053 		pn = seq.aes_cmac.pn;
3054 		igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3055 						       ((u64) pn[4] << 8) |
3056 						       ((u64) pn[3] << 16) |
3057 						       ((u64) pn[2] << 24) |
3058 						       ((u64) pn[1] << 32) |
3059 						       ((u64) pn[0] << 40));
3060 	}
3061 
3062 	IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3063 		       remove_key ? "removing" : "installing",
3064 		       igtk_cmd.sta_id);
3065 
3066 	if (!iwl_mvm_has_new_rx_api(mvm)) {
3067 		struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3068 			.ctrl_flags = igtk_cmd.ctrl_flags,
3069 			.key_id = igtk_cmd.key_id,
3070 			.sta_id = igtk_cmd.sta_id,
3071 			.receive_seq_cnt = igtk_cmd.receive_seq_cnt
3072 		};
3073 
3074 		memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3075 		       ARRAY_SIZE(igtk_cmd_v1.igtk));
3076 		return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3077 					    sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3078 	}
3079 	return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3080 				    sizeof(igtk_cmd), &igtk_cmd);
3081 }
3082 
3083 
3084 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3085 				       struct ieee80211_vif *vif,
3086 				       struct ieee80211_sta *sta)
3087 {
3088 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3089 
3090 	if (sta)
3091 		return sta->addr;
3092 
3093 	if (vif->type == NL80211_IFTYPE_STATION &&
3094 	    mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3095 		u8 sta_id = mvmvif->ap_sta_id;
3096 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3097 						lockdep_is_held(&mvm->mutex));
3098 		return sta->addr;
3099 	}
3100 
3101 
3102 	return NULL;
3103 }
3104 
3105 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3106 				 struct ieee80211_vif *vif,
3107 				 struct ieee80211_sta *sta,
3108 				 struct ieee80211_key_conf *keyconf,
3109 				 u8 key_offset,
3110 				 bool mcast)
3111 {
3112 	int ret;
3113 	const u8 *addr;
3114 	struct ieee80211_key_seq seq;
3115 	u16 p1k[5];
3116 	u32 sta_id;
3117 	bool mfp = false;
3118 
3119 	if (sta) {
3120 		struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3121 
3122 		sta_id = mvm_sta->sta_id;
3123 		mfp = sta->mfp;
3124 	} else if (vif->type == NL80211_IFTYPE_AP &&
3125 		   !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3126 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3127 
3128 		sta_id = mvmvif->mcast_sta.sta_id;
3129 	} else {
3130 		IWL_ERR(mvm, "Failed to find station id\n");
3131 		return -EINVAL;
3132 	}
3133 
3134 	switch (keyconf->cipher) {
3135 	case WLAN_CIPHER_SUITE_TKIP:
3136 		if (vif->type == NL80211_IFTYPE_AP) {
3137 			ret = -EINVAL;
3138 			break;
3139 		}
3140 		addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3141 		/* get phase 1 key from mac80211 */
3142 		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3143 		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3144 		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3145 					   seq.tkip.iv32, p1k, 0, key_offset,
3146 					   mfp);
3147 		break;
3148 	case WLAN_CIPHER_SUITE_CCMP:
3149 	case WLAN_CIPHER_SUITE_WEP40:
3150 	case WLAN_CIPHER_SUITE_WEP104:
3151 	case WLAN_CIPHER_SUITE_GCMP:
3152 	case WLAN_CIPHER_SUITE_GCMP_256:
3153 		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3154 					   0, NULL, 0, key_offset, mfp);
3155 		break;
3156 	default:
3157 		ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3158 					   0, NULL, 0, key_offset, mfp);
3159 	}
3160 
3161 	return ret;
3162 }
3163 
3164 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3165 				    struct ieee80211_key_conf *keyconf,
3166 				    bool mcast)
3167 {
3168 	union {
3169 		struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3170 		struct iwl_mvm_add_sta_key_cmd cmd;
3171 	} u = {};
3172 	bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3173 				  IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3174 	__le16 key_flags;
3175 	int ret, size;
3176 	u32 status;
3177 
3178 	/* This is a valid situation for GTK removal */
3179 	if (sta_id == IWL_MVM_INVALID_STA)
3180 		return 0;
3181 
3182 	key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3183 				 STA_KEY_FLG_KEYID_MSK);
3184 	key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3185 	key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3186 
3187 	if (mcast)
3188 		key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3189 
3190 	/*
3191 	 * The fields assigned here are in the same location at the start
3192 	 * of the command, so we can do this union trick.
3193 	 */
3194 	u.cmd.common.key_flags = key_flags;
3195 	u.cmd.common.key_offset = keyconf->hw_key_idx;
3196 	u.cmd.common.sta_id = sta_id;
3197 
3198 	size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3199 
3200 	status = ADD_STA_SUCCESS;
3201 	ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3202 					  &status);
3203 
3204 	switch (status) {
3205 	case ADD_STA_SUCCESS:
3206 		IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3207 		break;
3208 	default:
3209 		ret = -EIO;
3210 		IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3211 		break;
3212 	}
3213 
3214 	return ret;
3215 }
3216 
3217 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3218 			struct ieee80211_vif *vif,
3219 			struct ieee80211_sta *sta,
3220 			struct ieee80211_key_conf *keyconf,
3221 			u8 key_offset)
3222 {
3223 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3224 	struct iwl_mvm_sta *mvm_sta;
3225 	u8 sta_id = IWL_MVM_INVALID_STA;
3226 	int ret;
3227 	static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3228 
3229 	lockdep_assert_held(&mvm->mutex);
3230 
3231 	if (vif->type != NL80211_IFTYPE_AP ||
3232 	    keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3233 		/* Get the station id from the mvm local station table */
3234 		mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3235 		if (!mvm_sta) {
3236 			IWL_ERR(mvm, "Failed to find station\n");
3237 			return -EINVAL;
3238 		}
3239 		sta_id = mvm_sta->sta_id;
3240 
3241 		/*
3242 		 * It is possible that the 'sta' parameter is NULL, and thus
3243 		 * there is a need to retrieve the sta from the local station
3244 		 * table.
3245 		 */
3246 		if (!sta) {
3247 			sta = rcu_dereference_protected(
3248 				mvm->fw_id_to_mac_id[sta_id],
3249 				lockdep_is_held(&mvm->mutex));
3250 			if (IS_ERR_OR_NULL(sta)) {
3251 				IWL_ERR(mvm, "Invalid station id\n");
3252 				return -EINVAL;
3253 			}
3254 		}
3255 
3256 		if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3257 			return -EINVAL;
3258 	} else {
3259 		struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3260 
3261 		sta_id = mvmvif->mcast_sta.sta_id;
3262 	}
3263 
3264 	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3265 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3266 	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3267 		ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3268 		goto end;
3269 	}
3270 
3271 	/* If the key_offset is not pre-assigned, we need to find a
3272 	 * new offset to use.  In normal cases, the offset is not
3273 	 * pre-assigned, but during HW_RESTART we want to reuse the
3274 	 * same indices, so we pass them when this function is called.
3275 	 *
3276 	 * In D3 entry, we need to hardcoded the indices (because the
3277 	 * firmware hardcodes the PTK offset to 0).  In this case, we
3278 	 * need to make sure we don't overwrite the hw_key_idx in the
3279 	 * keyconf structure, because otherwise we cannot configure
3280 	 * the original ones back when resuming.
3281 	 */
3282 	if (key_offset == STA_KEY_IDX_INVALID) {
3283 		key_offset  = iwl_mvm_set_fw_key_idx(mvm);
3284 		if (key_offset == STA_KEY_IDX_INVALID)
3285 			return -ENOSPC;
3286 		keyconf->hw_key_idx = key_offset;
3287 	}
3288 
3289 	ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3290 	if (ret)
3291 		goto end;
3292 
3293 	/*
3294 	 * For WEP, the same key is used for multicast and unicast. Upload it
3295 	 * again, using the same key offset, and now pointing the other one
3296 	 * to the same key slot (offset).
3297 	 * If this fails, remove the original as well.
3298 	 */
3299 	if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3300 	     keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3301 	    sta) {
3302 		ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3303 					    key_offset, !mcast);
3304 		if (ret) {
3305 			__iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3306 			goto end;
3307 		}
3308 	}
3309 
3310 	__set_bit(key_offset, mvm->fw_key_table);
3311 
3312 end:
3313 	IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3314 		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3315 		      sta ? sta->addr : zero_addr, ret);
3316 	return ret;
3317 }
3318 
3319 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3320 			   struct ieee80211_vif *vif,
3321 			   struct ieee80211_sta *sta,
3322 			   struct ieee80211_key_conf *keyconf)
3323 {
3324 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3325 	struct iwl_mvm_sta *mvm_sta;
3326 	u8 sta_id = IWL_MVM_INVALID_STA;
3327 	int ret, i;
3328 
3329 	lockdep_assert_held(&mvm->mutex);
3330 
3331 	/* Get the station from the mvm local station table */
3332 	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3333 	if (mvm_sta)
3334 		sta_id = mvm_sta->sta_id;
3335 	else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3336 		sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3337 
3338 
3339 	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3340 		      keyconf->keyidx, sta_id);
3341 
3342 	if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3343 			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3344 			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3345 		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3346 
3347 	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3348 		IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3349 			keyconf->hw_key_idx);
3350 		return -ENOENT;
3351 	}
3352 
3353 	/* track which key was deleted last */
3354 	for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3355 		if (mvm->fw_key_deleted[i] < U8_MAX)
3356 			mvm->fw_key_deleted[i]++;
3357 	}
3358 	mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3359 
3360 	if (sta && !mvm_sta) {
3361 		IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3362 		return 0;
3363 	}
3364 
3365 	ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3366 	if (ret)
3367 		return ret;
3368 
3369 	/* delete WEP key twice to get rid of (now useless) offset */
3370 	if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3371 	    keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3372 		ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3373 
3374 	return ret;
3375 }
3376 
3377 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3378 			     struct ieee80211_vif *vif,
3379 			     struct ieee80211_key_conf *keyconf,
3380 			     struct ieee80211_sta *sta, u32 iv32,
3381 			     u16 *phase1key)
3382 {
3383 	struct iwl_mvm_sta *mvm_sta;
3384 	bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3385 	bool mfp = sta ? sta->mfp : false;
3386 
3387 	rcu_read_lock();
3388 
3389 	mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3390 	if (WARN_ON_ONCE(!mvm_sta))
3391 		goto unlock;
3392 	iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3393 			     iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3394 			     mfp);
3395 
3396  unlock:
3397 	rcu_read_unlock();
3398 }
3399 
3400 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3401 				struct ieee80211_sta *sta)
3402 {
3403 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3404 	struct iwl_mvm_add_sta_cmd cmd = {
3405 		.add_modify = STA_MODE_MODIFY,
3406 		.sta_id = mvmsta->sta_id,
3407 		.station_flags_msk = cpu_to_le32(STA_FLG_PS),
3408 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3409 	};
3410 	int ret;
3411 
3412 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3413 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3414 	if (ret)
3415 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3416 }
3417 
3418 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3419 				       struct ieee80211_sta *sta,
3420 				       enum ieee80211_frame_release_type reason,
3421 				       u16 cnt, u16 tids, bool more_data,
3422 				       bool single_sta_queue)
3423 {
3424 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3425 	struct iwl_mvm_add_sta_cmd cmd = {
3426 		.add_modify = STA_MODE_MODIFY,
3427 		.sta_id = mvmsta->sta_id,
3428 		.modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3429 		.sleep_tx_count = cpu_to_le16(cnt),
3430 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3431 	};
3432 	int tid, ret;
3433 	unsigned long _tids = tids;
3434 
3435 	/* convert TIDs to ACs - we don't support TSPEC so that's OK
3436 	 * Note that this field is reserved and unused by firmware not
3437 	 * supporting GO uAPSD, so it's safe to always do this.
3438 	 */
3439 	for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3440 		cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3441 
3442 	/* If we're releasing frames from aggregation or dqa queues then check
3443 	 * if all the queues that we're releasing frames from, combined, have:
3444 	 *  - more frames than the service period, in which case more_data
3445 	 *    needs to be set
3446 	 *  - fewer than 'cnt' frames, in which case we need to adjust the
3447 	 *    firmware command (but do that unconditionally)
3448 	 */
3449 	if (single_sta_queue) {
3450 		int remaining = cnt;
3451 		int sleep_tx_count;
3452 
3453 		spin_lock_bh(&mvmsta->lock);
3454 		for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3455 			struct iwl_mvm_tid_data *tid_data;
3456 			u16 n_queued;
3457 
3458 			tid_data = &mvmsta->tid_data[tid];
3459 
3460 			n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3461 			if (n_queued > remaining) {
3462 				more_data = true;
3463 				remaining = 0;
3464 				break;
3465 			}
3466 			remaining -= n_queued;
3467 		}
3468 		sleep_tx_count = cnt - remaining;
3469 		if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3470 			mvmsta->sleep_tx_count = sleep_tx_count;
3471 		spin_unlock_bh(&mvmsta->lock);
3472 
3473 		cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3474 		if (WARN_ON(cnt - remaining == 0)) {
3475 			ieee80211_sta_eosp(sta);
3476 			return;
3477 		}
3478 	}
3479 
3480 	/* Note: this is ignored by firmware not supporting GO uAPSD */
3481 	if (more_data)
3482 		cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3483 
3484 	if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3485 		mvmsta->next_status_eosp = true;
3486 		cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3487 	} else {
3488 		cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3489 	}
3490 
3491 	/* block the Tx queues until the FW updated the sleep Tx count */
3492 	iwl_trans_block_txq_ptrs(mvm->trans, true);
3493 
3494 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3495 				   CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3496 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3497 	if (ret)
3498 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3499 }
3500 
3501 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3502 			   struct iwl_rx_cmd_buffer *rxb)
3503 {
3504 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
3505 	struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3506 	struct ieee80211_sta *sta;
3507 	u32 sta_id = le32_to_cpu(notif->sta_id);
3508 
3509 	if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3510 		return;
3511 
3512 	rcu_read_lock();
3513 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3514 	if (!IS_ERR_OR_NULL(sta))
3515 		ieee80211_sta_eosp(sta);
3516 	rcu_read_unlock();
3517 }
3518 
3519 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3520 				   struct iwl_mvm_sta *mvmsta, bool disable)
3521 {
3522 	struct iwl_mvm_add_sta_cmd cmd = {
3523 		.add_modify = STA_MODE_MODIFY,
3524 		.sta_id = mvmsta->sta_id,
3525 		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3526 		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3527 		.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3528 	};
3529 	int ret;
3530 
3531 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3532 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3533 	if (ret)
3534 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3535 }
3536 
3537 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3538 				      struct ieee80211_sta *sta,
3539 				      bool disable)
3540 {
3541 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3542 
3543 	spin_lock_bh(&mvm_sta->lock);
3544 
3545 	if (mvm_sta->disable_tx == disable) {
3546 		spin_unlock_bh(&mvm_sta->lock);
3547 		return;
3548 	}
3549 
3550 	mvm_sta->disable_tx = disable;
3551 
3552 	/* Tell mac80211 to start/stop queuing tx for this station */
3553 	ieee80211_sta_block_awake(mvm->hw, sta, disable);
3554 
3555 	iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3556 
3557 	spin_unlock_bh(&mvm_sta->lock);
3558 }
3559 
3560 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3561 					      struct iwl_mvm_vif *mvmvif,
3562 					      struct iwl_mvm_int_sta *sta,
3563 					      bool disable)
3564 {
3565 	u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3566 	struct iwl_mvm_add_sta_cmd cmd = {
3567 		.add_modify = STA_MODE_MODIFY,
3568 		.sta_id = sta->sta_id,
3569 		.station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3570 		.station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3571 		.mac_id_n_color = cpu_to_le32(id),
3572 	};
3573 	int ret;
3574 
3575 	ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3576 				   iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3577 	if (ret)
3578 		IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3579 }
3580 
3581 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3582 				       struct iwl_mvm_vif *mvmvif,
3583 				       bool disable)
3584 {
3585 	struct ieee80211_sta *sta;
3586 	struct iwl_mvm_sta *mvm_sta;
3587 	int i;
3588 
3589 	lockdep_assert_held(&mvm->mutex);
3590 
3591 	/* Block/unblock all the stations of the given mvmvif */
3592 	for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3593 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3594 						lockdep_is_held(&mvm->mutex));
3595 		if (IS_ERR_OR_NULL(sta))
3596 			continue;
3597 
3598 		mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3599 		if (mvm_sta->mac_id_n_color !=
3600 		    FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3601 			continue;
3602 
3603 		iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3604 	}
3605 
3606 	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3607 		return;
3608 
3609 	/* Need to block/unblock also multicast station */
3610 	if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3611 		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3612 						  &mvmvif->mcast_sta, disable);
3613 
3614 	/*
3615 	 * Only unblock the broadcast station (FW blocks it for immediate
3616 	 * quiet, not the driver)
3617 	 */
3618 	if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3619 		iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3620 						  &mvmvif->bcast_sta, disable);
3621 }
3622 
3623 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3624 {
3625 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3626 	struct iwl_mvm_sta *mvmsta;
3627 
3628 	rcu_read_lock();
3629 
3630 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3631 
3632 	if (!WARN_ON(!mvmsta))
3633 		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3634 
3635 	rcu_read_unlock();
3636 }
3637 
3638 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3639 {
3640 	u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3641 
3642 	/*
3643 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3644 	 * to align the wrap around of ssn so we compare relevant values.
3645 	 */
3646 	if (mvm->trans->cfg->gen2)
3647 		sn &= 0xff;
3648 
3649 	return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3650 }
3651