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[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / sta.c
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 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "sta.h"
71 #include "rs.h"
72
73 /*
74 * New version of ADD_STA_sta command added new fields at the end of the
75 * structure, so sending the size of the relevant API's structure is enough to
76 * support both API versions.
77 */
78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
79 {
80 return iwl_mvm_has_new_rx_api(mvm) ?
81 sizeof(struct iwl_mvm_add_sta_cmd) :
82 sizeof(struct iwl_mvm_add_sta_cmd_v7);
83 }
84
85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
86 enum nl80211_iftype iftype)
87 {
88 int sta_id;
89 u32 reserved_ids = 0;
90
91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
93
94 lockdep_assert_held(&mvm->mutex);
95
96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
97 if (iftype != NL80211_IFTYPE_STATION)
98 reserved_ids = BIT(0);
99
100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
102 if (BIT(sta_id) & reserved_ids)
103 continue;
104
105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
106 lockdep_is_held(&mvm->mutex)))
107 return sta_id;
108 }
109 return IWL_MVM_STATION_COUNT;
110 }
111
112 /* send station add/update command to firmware */
113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
114 bool update, unsigned int flags)
115 {
116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
117 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
118 .sta_id = mvm_sta->sta_id,
119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
120 .add_modify = update ? 1 : 0,
121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
122 STA_FLG_MIMO_EN_MSK),
123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
124 };
125 int ret;
126 u32 status;
127 u32 agg_size = 0, mpdu_dens = 0;
128
129 if (!update || (flags & STA_MODIFY_QUEUES)) {
130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132
133 if (flags & STA_MODIFY_QUEUES)
134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
135 }
136
137 switch (sta->bandwidth) {
138 case IEEE80211_STA_RX_BW_160:
139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
140 /* fall through */
141 case IEEE80211_STA_RX_BW_80:
142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
143 /* fall through */
144 case IEEE80211_STA_RX_BW_40:
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
146 /* fall through */
147 case IEEE80211_STA_RX_BW_20:
148 if (sta->ht_cap.ht_supported)
149 add_sta_cmd.station_flags |=
150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
151 break;
152 }
153
154 switch (sta->rx_nss) {
155 case 1:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case 2:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
160 break;
161 case 3 ... 8:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
163 break;
164 }
165
166 switch (sta->smps_mode) {
167 case IEEE80211_SMPS_AUTOMATIC:
168 case IEEE80211_SMPS_NUM_MODES:
169 WARN_ON(1);
170 break;
171 case IEEE80211_SMPS_STATIC:
172 /* override NSS */
173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
175 break;
176 case IEEE80211_SMPS_DYNAMIC:
177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
178 break;
179 case IEEE80211_SMPS_OFF:
180 /* nothing */
181 break;
182 }
183
184 if (sta->ht_cap.ht_supported) {
185 add_sta_cmd.station_flags_msk |=
186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
187 STA_FLG_AGG_MPDU_DENS_MSK);
188
189 mpdu_dens = sta->ht_cap.ampdu_density;
190 }
191
192 if (sta->vht_cap.vht_supported) {
193 agg_size = sta->vht_cap.cap &
194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
195 agg_size >>=
196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
197 } else if (sta->ht_cap.ht_supported) {
198 agg_size = sta->ht_cap.ampdu_factor;
199 }
200
201 add_sta_cmd.station_flags |=
202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
203 add_sta_cmd.station_flags |=
204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
205 if (mvm_sta->associated)
206 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
207
208 if (sta->wme) {
209 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
210
211 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
212 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BK);
213 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
214 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_BE);
215 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
216 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VI);
217 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
218 add_sta_cmd.uapsd_trigger_acs |= BIT(AC_VO);
219 }
220
221 status = ADD_STA_SUCCESS;
222 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
223 iwl_mvm_add_sta_cmd_size(mvm),
224 &add_sta_cmd, &status);
225 if (ret)
226 return ret;
227
228 switch (status & IWL_ADD_STA_STATUS_MASK) {
229 case ADD_STA_SUCCESS:
230 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
231 break;
232 default:
233 ret = -EIO;
234 IWL_ERR(mvm, "ADD_STA failed\n");
235 break;
236 }
237
238 return ret;
239 }
240
241 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
242 {
243 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
244 struct iwl_mvm_baid_data *ba_data;
245 struct ieee80211_sta *sta;
246 struct iwl_mvm_sta *mvm_sta;
247 unsigned long timeout;
248
249 rcu_read_lock();
250
251 ba_data = rcu_dereference(*rcu_ptr);
252
253 if (WARN_ON(!ba_data))
254 goto unlock;
255
256 if (!ba_data->timeout)
257 goto unlock;
258
259 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
260 if (time_is_after_jiffies(timeout)) {
261 mod_timer(&ba_data->session_timer, timeout);
262 goto unlock;
263 }
264
265 /* Timer expired */
266 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
267 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
268 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
269 sta->addr, ba_data->tid);
270 unlock:
271 rcu_read_unlock();
272 }
273
274 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
275 struct ieee80211_sta *sta)
276 {
277 unsigned long used_hw_queues;
278 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
279 unsigned int wdg_timeout =
280 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
281 u32 ac;
282
283 lockdep_assert_held(&mvm->mutex);
284
285 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
286
287 /* Find available queues, and allocate them to the ACs */
288 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
289 u8 queue = find_first_zero_bit(&used_hw_queues,
290 mvm->first_agg_queue);
291
292 if (queue >= mvm->first_agg_queue) {
293 IWL_ERR(mvm, "Failed to allocate STA queue\n");
294 return -EBUSY;
295 }
296
297 __set_bit(queue, &used_hw_queues);
298 mvmsta->hw_queue[ac] = queue;
299 }
300
301 /* Found a place for all queues - enable them */
302 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
303 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
304 mvmsta->hw_queue[ac],
305 iwl_mvm_ac_to_tx_fifo[ac], 0,
306 wdg_timeout);
307 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
308 }
309
310 return 0;
311 }
312
313 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
314 struct ieee80211_sta *sta)
315 {
316 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
317 unsigned long sta_msk;
318 int i;
319
320 lockdep_assert_held(&mvm->mutex);
321
322 /* disable the TDLS STA-specific queues */
323 sta_msk = mvmsta->tfd_queue_msk;
324 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
325 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
326 }
327
328 /* Disable aggregations for a bitmap of TIDs for a given station */
329 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
330 unsigned long disable_agg_tids,
331 bool remove_queue)
332 {
333 struct iwl_mvm_add_sta_cmd cmd = {};
334 struct ieee80211_sta *sta;
335 struct iwl_mvm_sta *mvmsta;
336 u32 status;
337 u8 sta_id;
338 int ret;
339
340 spin_lock_bh(&mvm->queue_info_lock);
341 sta_id = mvm->queue_info[queue].ra_sta_id;
342 spin_unlock_bh(&mvm->queue_info_lock);
343
344 rcu_read_lock();
345
346 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
347
348 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
349 rcu_read_unlock();
350 return -EINVAL;
351 }
352
353 mvmsta = iwl_mvm_sta_from_mac80211(sta);
354
355 mvmsta->tid_disable_agg |= disable_agg_tids;
356
357 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
358 cmd.sta_id = mvmsta->sta_id;
359 cmd.add_modify = STA_MODE_MODIFY;
360 cmd.modify_mask = STA_MODIFY_QUEUES;
361 if (disable_agg_tids)
362 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
363 if (remove_queue)
364 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
365 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
366 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
367
368 rcu_read_unlock();
369
370 /* Notify FW of queue removal from the STA queues */
371 status = ADD_STA_SUCCESS;
372 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
373 iwl_mvm_add_sta_cmd_size(mvm),
374 &cmd, &status);
375
376 return ret;
377 }
378
379 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
380 {
381 struct ieee80211_sta *sta;
382 struct iwl_mvm_sta *mvmsta;
383 unsigned long tid_bitmap;
384 unsigned long agg_tids = 0;
385 s8 sta_id;
386 int tid;
387
388 lockdep_assert_held(&mvm->mutex);
389
390 spin_lock_bh(&mvm->queue_info_lock);
391 sta_id = mvm->queue_info[queue].ra_sta_id;
392 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
393 spin_unlock_bh(&mvm->queue_info_lock);
394
395 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
396 lockdep_is_held(&mvm->mutex));
397
398 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
399 return -EINVAL;
400
401 mvmsta = iwl_mvm_sta_from_mac80211(sta);
402
403 spin_lock_bh(&mvmsta->lock);
404 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
405 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
406 agg_tids |= BIT(tid);
407 }
408 spin_unlock_bh(&mvmsta->lock);
409
410 return agg_tids;
411 }
412
413 /*
414 * Remove a queue from a station's resources.
415 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
416 * doesn't disable the queue
417 */
418 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
419 {
420 struct ieee80211_sta *sta;
421 struct iwl_mvm_sta *mvmsta;
422 unsigned long tid_bitmap;
423 unsigned long disable_agg_tids = 0;
424 u8 sta_id;
425 int tid;
426
427 lockdep_assert_held(&mvm->mutex);
428
429 spin_lock_bh(&mvm->queue_info_lock);
430 sta_id = mvm->queue_info[queue].ra_sta_id;
431 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
432 spin_unlock_bh(&mvm->queue_info_lock);
433
434 rcu_read_lock();
435
436 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
437
438 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
439 rcu_read_unlock();
440 return 0;
441 }
442
443 mvmsta = iwl_mvm_sta_from_mac80211(sta);
444
445 spin_lock_bh(&mvmsta->lock);
446 /* Unmap MAC queues and TIDs from this queue */
447 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
448 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
449 disable_agg_tids |= BIT(tid);
450 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
451 }
452
453 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
454 spin_unlock_bh(&mvmsta->lock);
455
456 rcu_read_unlock();
457
458 return disable_agg_tids;
459 }
460
461 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
462 bool same_sta)
463 {
464 struct iwl_mvm_sta *mvmsta;
465 u8 txq_curr_ac, sta_id, tid;
466 unsigned long disable_agg_tids = 0;
467 int ret;
468
469 lockdep_assert_held(&mvm->mutex);
470
471 spin_lock_bh(&mvm->queue_info_lock);
472 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
473 sta_id = mvm->queue_info[queue].ra_sta_id;
474 tid = mvm->queue_info[queue].txq_tid;
475 spin_unlock_bh(&mvm->queue_info_lock);
476
477 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
478
479 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
480 /* Disable the queue */
481 if (disable_agg_tids)
482 iwl_mvm_invalidate_sta_queue(mvm, queue,
483 disable_agg_tids, false);
484
485 ret = iwl_mvm_disable_txq(mvm, queue,
486 mvmsta->vif->hw_queue[txq_curr_ac],
487 tid, 0);
488 if (ret) {
489 /* Re-mark the inactive queue as inactive */
490 spin_lock_bh(&mvm->queue_info_lock);
491 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
492 spin_unlock_bh(&mvm->queue_info_lock);
493 IWL_ERR(mvm,
494 "Failed to free inactive queue %d (ret=%d)\n",
495 queue, ret);
496
497 return ret;
498 }
499
500 /* If TXQ is allocated to another STA, update removal in FW */
501 if (!same_sta)
502 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
503
504 return 0;
505 }
506
507 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
508 unsigned long tfd_queue_mask, u8 ac)
509 {
510 int queue = 0;
511 u8 ac_to_queue[IEEE80211_NUM_ACS];
512 int i;
513
514 lockdep_assert_held(&mvm->queue_info_lock);
515
516 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
517
518 /* See what ACs the existing queues for this STA have */
519 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
520 /* Only DATA queues can be shared */
521 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
522 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
523 continue;
524
525 /* Don't try and take queues being reconfigured */
526 if (mvm->queue_info[queue].status ==
527 IWL_MVM_QUEUE_RECONFIGURING)
528 continue;
529
530 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
531 }
532
533 /*
534 * The queue to share is chosen only from DATA queues as follows (in
535 * descending priority):
536 * 1. An AC_BE queue
537 * 2. Same AC queue
538 * 3. Highest AC queue that is lower than new AC
539 * 4. Any existing AC (there always is at least 1 DATA queue)
540 */
541
542 /* Priority 1: An AC_BE queue */
543 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
544 queue = ac_to_queue[IEEE80211_AC_BE];
545 /* Priority 2: Same AC queue */
546 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
547 queue = ac_to_queue[ac];
548 /* Priority 3a: If new AC is VO and VI exists - use VI */
549 else if (ac == IEEE80211_AC_VO &&
550 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
551 queue = ac_to_queue[IEEE80211_AC_VI];
552 /* Priority 3b: No BE so only AC less than the new one is BK */
553 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
554 queue = ac_to_queue[IEEE80211_AC_BK];
555 /* Priority 4a: No BE nor BK - use VI if exists */
556 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
557 queue = ac_to_queue[IEEE80211_AC_VI];
558 /* Priority 4b: No BE, BK nor VI - use VO if exists */
559 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
560 queue = ac_to_queue[IEEE80211_AC_VO];
561
562 /* Make sure queue found (or not) is legal */
563 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
564 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
565 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
566 IWL_ERR(mvm, "No DATA queues available to share\n");
567 return -ENOSPC;
568 }
569
570 /* Make sure the queue isn't in the middle of being reconfigured */
571 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
572 IWL_ERR(mvm,
573 "TXQ %d is in the middle of re-config - try again\n",
574 queue);
575 return -EBUSY;
576 }
577
578 return queue;
579 }
580
581 /*
582 * If a given queue has a higher AC than the TID stream that is being compared
583 * to, the queue needs to be redirected to the lower AC. This function does that
584 * in such a case, otherwise - if no redirection required - it does nothing,
585 * unless the %force param is true.
586 */
587 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
588 int ac, int ssn, unsigned int wdg_timeout,
589 bool force)
590 {
591 struct iwl_scd_txq_cfg_cmd cmd = {
592 .scd_queue = queue,
593 .action = SCD_CFG_DISABLE_QUEUE,
594 };
595 bool shared_queue;
596 unsigned long mq;
597 int ret;
598
599 /*
600 * If the AC is lower than current one - FIFO needs to be redirected to
601 * the lowest one of the streams in the queue. Check if this is needed
602 * here.
603 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
604 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
605 * we need to check if the numerical value of X is LARGER than of Y.
606 */
607 spin_lock_bh(&mvm->queue_info_lock);
608 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
609 spin_unlock_bh(&mvm->queue_info_lock);
610
611 IWL_DEBUG_TX_QUEUES(mvm,
612 "No redirection needed on TXQ #%d\n",
613 queue);
614 return 0;
615 }
616
617 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
618 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
619 cmd.tid = mvm->queue_info[queue].txq_tid;
620 mq = mvm->queue_info[queue].hw_queue_to_mac80211;
621 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
622 spin_unlock_bh(&mvm->queue_info_lock);
623
624 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
625 queue, iwl_mvm_ac_to_tx_fifo[ac]);
626
627 /* Stop MAC queues and wait for this queue to empty */
628 iwl_mvm_stop_mac_queues(mvm, mq);
629 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
630 if (ret) {
631 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
632 queue);
633 ret = -EIO;
634 goto out;
635 }
636
637 /* Before redirecting the queue we need to de-activate it */
638 iwl_trans_txq_disable(mvm->trans, queue, false);
639 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
640 if (ret)
641 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
642 ret);
643
644 /* Make sure the SCD wrptr is correctly set before reconfiguring */
645 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
646
647 /* Update the TID "owner" of the queue */
648 spin_lock_bh(&mvm->queue_info_lock);
649 mvm->queue_info[queue].txq_tid = tid;
650 spin_unlock_bh(&mvm->queue_info_lock);
651
652 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
653
654 /* Redirect to lower AC */
655 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
656 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
657 ssn);
658
659 /* Update AC marking of the queue */
660 spin_lock_bh(&mvm->queue_info_lock);
661 mvm->queue_info[queue].mac80211_ac = ac;
662 spin_unlock_bh(&mvm->queue_info_lock);
663
664 /*
665 * Mark queue as shared in transport if shared
666 * Note this has to be done after queue enablement because enablement
667 * can also set this value, and there is no indication there to shared
668 * queues
669 */
670 if (shared_queue)
671 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
672
673 out:
674 /* Continue using the MAC queues */
675 iwl_mvm_start_mac_queues(mvm, mq);
676
677 return ret;
678 }
679
680 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
681 struct ieee80211_sta *sta, u8 ac, int tid,
682 struct ieee80211_hdr *hdr)
683 {
684 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
685 struct iwl_trans_txq_scd_cfg cfg = {
686 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
687 .sta_id = mvmsta->sta_id,
688 .tid = tid,
689 .frame_limit = IWL_FRAME_LIMIT,
690 };
691 unsigned int wdg_timeout =
692 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
693 u8 mac_queue = mvmsta->vif->hw_queue[ac];
694 int queue = -1;
695 bool using_inactive_queue = false, same_sta = false;
696 unsigned long disable_agg_tids = 0;
697 enum iwl_mvm_agg_state queue_state;
698 bool shared_queue = false;
699 int ssn;
700 unsigned long tfd_queue_mask;
701 int ret;
702
703 lockdep_assert_held(&mvm->mutex);
704
705 spin_lock_bh(&mvmsta->lock);
706 tfd_queue_mask = mvmsta->tfd_queue_msk;
707 spin_unlock_bh(&mvmsta->lock);
708
709 spin_lock_bh(&mvm->queue_info_lock);
710
711 /*
712 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
713 * exists
714 */
715 if (!ieee80211_is_data_qos(hdr->frame_control) ||
716 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
717 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
718 IWL_MVM_DQA_MIN_MGMT_QUEUE,
719 IWL_MVM_DQA_MAX_MGMT_QUEUE);
720 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
721 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
722 queue);
723
724 /* If no such queue is found, we'll use a DATA queue instead */
725 }
726
727 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
728 (mvm->queue_info[mvmsta->reserved_queue].status ==
729 IWL_MVM_QUEUE_RESERVED ||
730 mvm->queue_info[mvmsta->reserved_queue].status ==
731 IWL_MVM_QUEUE_INACTIVE)) {
732 queue = mvmsta->reserved_queue;
733 mvm->queue_info[queue].reserved = true;
734 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
735 }
736
737 if (queue < 0)
738 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
739 IWL_MVM_DQA_MIN_DATA_QUEUE,
740 IWL_MVM_DQA_MAX_DATA_QUEUE);
741
742 /*
743 * Check if this queue is already allocated but inactive.
744 * In such a case, we'll need to first free this queue before enabling
745 * it again, so we'll mark it as reserved to make sure no new traffic
746 * arrives on it
747 */
748 if (queue > 0 &&
749 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
750 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
751 using_inactive_queue = true;
752 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
753 IWL_DEBUG_TX_QUEUES(mvm,
754 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
755 queue, mvmsta->sta_id, tid);
756 }
757
758 /* No free queue - we'll have to share */
759 if (queue <= 0) {
760 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
761 if (queue > 0) {
762 shared_queue = true;
763 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
764 }
765 }
766
767 /*
768 * Mark TXQ as ready, even though it hasn't been fully configured yet,
769 * to make sure no one else takes it.
770 * This will allow avoiding re-acquiring the lock at the end of the
771 * configuration. On error we'll mark it back as free.
772 */
773 if ((queue > 0) && !shared_queue)
774 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
775
776 spin_unlock_bh(&mvm->queue_info_lock);
777
778 /* This shouldn't happen - out of queues */
779 if (WARN_ON(queue <= 0)) {
780 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
781 tid, cfg.sta_id);
782 return queue;
783 }
784
785 /*
786 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
787 * but for configuring the SCD to send A-MPDUs we need to mark the queue
788 * as aggregatable.
789 * Mark all DATA queues as allowing to be aggregated at some point
790 */
791 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
792 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
793
794 /*
795 * If this queue was previously inactive (idle) - we need to free it
796 * first
797 */
798 if (using_inactive_queue) {
799 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
800 if (ret)
801 return ret;
802 }
803
804 IWL_DEBUG_TX_QUEUES(mvm,
805 "Allocating %squeue #%d to sta %d on tid %d\n",
806 shared_queue ? "shared " : "", queue,
807 mvmsta->sta_id, tid);
808
809 if (shared_queue) {
810 /* Disable any open aggs on this queue */
811 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
812
813 if (disable_agg_tids) {
814 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
815 queue);
816 iwl_mvm_invalidate_sta_queue(mvm, queue,
817 disable_agg_tids, false);
818 }
819 }
820
821 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
822 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
823 wdg_timeout);
824
825 /*
826 * Mark queue as shared in transport if shared
827 * Note this has to be done after queue enablement because enablement
828 * can also set this value, and there is no indication there to shared
829 * queues
830 */
831 if (shared_queue)
832 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
833
834 spin_lock_bh(&mvmsta->lock);
835 mvmsta->tid_data[tid].txq_id = queue;
836 mvmsta->tid_data[tid].is_tid_active = true;
837 mvmsta->tfd_queue_msk |= BIT(queue);
838 queue_state = mvmsta->tid_data[tid].state;
839
840 if (mvmsta->reserved_queue == queue)
841 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
842 spin_unlock_bh(&mvmsta->lock);
843
844 if (!shared_queue) {
845 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
846 if (ret)
847 goto out_err;
848
849 /* If we need to re-enable aggregations... */
850 if (queue_state == IWL_AGG_ON) {
851 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
852 if (ret)
853 goto out_err;
854 }
855 } else {
856 /* Redirect queue, if needed */
857 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
858 wdg_timeout, false);
859 if (ret)
860 goto out_err;
861 }
862
863 return 0;
864
865 out_err:
866 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
867
868 return ret;
869 }
870
871 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
872 {
873 struct iwl_scd_txq_cfg_cmd cmd = {
874 .scd_queue = queue,
875 .action = SCD_CFG_UPDATE_QUEUE_TID,
876 };
877 int tid;
878 unsigned long tid_bitmap;
879 int ret;
880
881 lockdep_assert_held(&mvm->mutex);
882
883 spin_lock_bh(&mvm->queue_info_lock);
884 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
885 spin_unlock_bh(&mvm->queue_info_lock);
886
887 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
888 return;
889
890 /* Find any TID for queue */
891 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
892 cmd.tid = tid;
893 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
894
895 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
896 if (ret) {
897 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
898 queue, ret);
899 return;
900 }
901
902 spin_lock_bh(&mvm->queue_info_lock);
903 mvm->queue_info[queue].txq_tid = tid;
904 spin_unlock_bh(&mvm->queue_info_lock);
905 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
906 queue, tid);
907 }
908
909 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
910 {
911 struct ieee80211_sta *sta;
912 struct iwl_mvm_sta *mvmsta;
913 s8 sta_id;
914 int tid = -1;
915 unsigned long tid_bitmap;
916 unsigned int wdg_timeout;
917 int ssn;
918 int ret = true;
919
920 lockdep_assert_held(&mvm->mutex);
921
922 spin_lock_bh(&mvm->queue_info_lock);
923 sta_id = mvm->queue_info[queue].ra_sta_id;
924 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
925 spin_unlock_bh(&mvm->queue_info_lock);
926
927 /* Find TID for queue, and make sure it is the only one on the queue */
928 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
929 if (tid_bitmap != BIT(tid)) {
930 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
931 queue, tid_bitmap);
932 return;
933 }
934
935 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
936 tid);
937
938 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
939 lockdep_is_held(&mvm->mutex));
940
941 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
942 return;
943
944 mvmsta = iwl_mvm_sta_from_mac80211(sta);
945 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
946
947 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
948
949 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
950 tid_to_mac80211_ac[tid], ssn,
951 wdg_timeout, true);
952 if (ret) {
953 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
954 return;
955 }
956
957 /* If aggs should be turned back on - do it */
958 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
959 struct iwl_mvm_add_sta_cmd cmd = {0};
960
961 mvmsta->tid_disable_agg &= ~BIT(tid);
962
963 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
964 cmd.sta_id = mvmsta->sta_id;
965 cmd.add_modify = STA_MODE_MODIFY;
966 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
967 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
968 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
969
970 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
971 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
972 if (!ret) {
973 IWL_DEBUG_TX_QUEUES(mvm,
974 "TXQ #%d is now aggregated again\n",
975 queue);
976
977 /* Mark queue intenally as aggregating again */
978 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
979 }
980 }
981
982 spin_lock_bh(&mvm->queue_info_lock);
983 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
984 spin_unlock_bh(&mvm->queue_info_lock);
985 }
986
987 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
988 {
989 if (tid == IWL_MAX_TID_COUNT)
990 return IEEE80211_AC_VO; /* MGMT */
991
992 return tid_to_mac80211_ac[tid];
993 }
994
995 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
996 struct ieee80211_sta *sta, int tid)
997 {
998 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
999 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1000 struct sk_buff *skb;
1001 struct ieee80211_hdr *hdr;
1002 struct sk_buff_head deferred_tx;
1003 u8 mac_queue;
1004 bool no_queue = false; /* Marks if there is a problem with the queue */
1005 u8 ac;
1006
1007 lockdep_assert_held(&mvm->mutex);
1008
1009 skb = skb_peek(&tid_data->deferred_tx_frames);
1010 if (!skb)
1011 return;
1012 hdr = (void *)skb->data;
1013
1014 ac = iwl_mvm_tid_to_ac_queue(tid);
1015 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1016
1017 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
1018 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1019 IWL_ERR(mvm,
1020 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1021 mvmsta->sta_id, tid);
1022
1023 /*
1024 * Mark queue as problematic so later the deferred traffic is
1025 * freed, as we can do nothing with it
1026 */
1027 no_queue = true;
1028 }
1029
1030 __skb_queue_head_init(&deferred_tx);
1031
1032 /* Disable bottom-halves when entering TX path */
1033 local_bh_disable();
1034 spin_lock(&mvmsta->lock);
1035 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1036 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1037 spin_unlock(&mvmsta->lock);
1038
1039 while ((skb = __skb_dequeue(&deferred_tx)))
1040 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1041 ieee80211_free_txskb(mvm->hw, skb);
1042 local_bh_enable();
1043
1044 /* Wake queue */
1045 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1046 }
1047
1048 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1049 {
1050 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1051 add_stream_wk);
1052 struct ieee80211_sta *sta;
1053 struct iwl_mvm_sta *mvmsta;
1054 unsigned long deferred_tid_traffic;
1055 int queue, sta_id, tid;
1056
1057 /* Check inactivity of queues */
1058 iwl_mvm_inactivity_check(mvm);
1059
1060 mutex_lock(&mvm->mutex);
1061
1062 /* Reconfigure queues requiring reconfiguation */
1063 for (queue = 0; queue < IWL_MAX_HW_QUEUES; queue++) {
1064 bool reconfig;
1065 bool change_owner;
1066
1067 spin_lock_bh(&mvm->queue_info_lock);
1068 reconfig = (mvm->queue_info[queue].status ==
1069 IWL_MVM_QUEUE_RECONFIGURING);
1070
1071 /*
1072 * We need to take into account a situation in which a TXQ was
1073 * allocated to TID x, and then turned shared by adding TIDs y
1074 * and z. If TID x becomes inactive and is removed from the TXQ,
1075 * ownership must be given to one of the remaining TIDs.
1076 * This is mainly because if TID x continues - a new queue can't
1077 * be allocated for it as long as it is an owner of another TXQ.
1078 */
1079 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1080 BIT(mvm->queue_info[queue].txq_tid)) &&
1081 (mvm->queue_info[queue].status ==
1082 IWL_MVM_QUEUE_SHARED);
1083 spin_unlock_bh(&mvm->queue_info_lock);
1084
1085 if (reconfig)
1086 iwl_mvm_unshare_queue(mvm, queue);
1087 else if (change_owner)
1088 iwl_mvm_change_queue_owner(mvm, queue);
1089 }
1090
1091 /* Go over all stations with deferred traffic */
1092 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1093 IWL_MVM_STATION_COUNT) {
1094 clear_bit(sta_id, mvm->sta_deferred_frames);
1095 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1096 lockdep_is_held(&mvm->mutex));
1097 if (IS_ERR_OR_NULL(sta))
1098 continue;
1099
1100 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1101 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1102
1103 for_each_set_bit(tid, &deferred_tid_traffic,
1104 IWL_MAX_TID_COUNT + 1)
1105 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1106 }
1107
1108 mutex_unlock(&mvm->mutex);
1109 }
1110
1111 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1112 struct ieee80211_sta *sta,
1113 enum nl80211_iftype vif_type)
1114 {
1115 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1116 int queue;
1117 bool using_inactive_queue = false, same_sta = false;
1118
1119 /*
1120 * Check for inactive queues, so we don't reach a situation where we
1121 * can't add a STA due to a shortage in queues that doesn't really exist
1122 */
1123 iwl_mvm_inactivity_check(mvm);
1124
1125 spin_lock_bh(&mvm->queue_info_lock);
1126
1127 /* Make sure we have free resources for this STA */
1128 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1129 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1130 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1131 IWL_MVM_QUEUE_FREE))
1132 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1133 else
1134 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1135 IWL_MVM_DQA_MIN_DATA_QUEUE,
1136 IWL_MVM_DQA_MAX_DATA_QUEUE);
1137 if (queue < 0) {
1138 spin_unlock_bh(&mvm->queue_info_lock);
1139 IWL_ERR(mvm, "No available queues for new station\n");
1140 return -ENOSPC;
1141 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1142 /*
1143 * If this queue is already allocated but inactive we'll need to
1144 * first free this queue before enabling it again, we'll mark
1145 * it as reserved to make sure no new traffic arrives on it
1146 */
1147 using_inactive_queue = true;
1148 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1149 }
1150 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1151
1152 spin_unlock_bh(&mvm->queue_info_lock);
1153
1154 mvmsta->reserved_queue = queue;
1155
1156 if (using_inactive_queue)
1157 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1158
1159 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1160 queue, mvmsta->sta_id);
1161
1162 return 0;
1163 }
1164
1165 /*
1166 * In DQA mode, after a HW restart the queues should be allocated as before, in
1167 * order to avoid race conditions when there are shared queues. This function
1168 * does the re-mapping and queue allocation.
1169 *
1170 * Note that re-enabling aggregations isn't done in this function.
1171 */
1172 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1173 struct iwl_mvm_sta *mvm_sta)
1174 {
1175 unsigned int wdg_timeout =
1176 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1177 int i;
1178 struct iwl_trans_txq_scd_cfg cfg = {
1179 .sta_id = mvm_sta->sta_id,
1180 .frame_limit = IWL_FRAME_LIMIT,
1181 };
1182
1183 /* Make sure reserved queue is still marked as such (if allocated) */
1184 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1185 mvm->queue_info[mvm_sta->reserved_queue].status =
1186 IWL_MVM_QUEUE_RESERVED;
1187
1188 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1189 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1190 int txq_id = tid_data->txq_id;
1191 int ac;
1192 u8 mac_queue;
1193
1194 if (txq_id == IEEE80211_INVAL_HW_QUEUE)
1195 continue;
1196
1197 skb_queue_head_init(&tid_data->deferred_tx_frames);
1198
1199 ac = tid_to_mac80211_ac[i];
1200 mac_queue = mvm_sta->vif->hw_queue[ac];
1201
1202 cfg.tid = i;
1203 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1204 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1205 txq_id == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1206
1207 IWL_DEBUG_TX_QUEUES(mvm,
1208 "Re-mapping sta %d tid %d to queue %d\n",
1209 mvm_sta->sta_id, i, txq_id);
1210
1211 iwl_mvm_enable_txq(mvm, txq_id, mac_queue,
1212 IEEE80211_SEQ_TO_SN(tid_data->seq_number),
1213 &cfg, wdg_timeout);
1214
1215 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1216 }
1217
1218 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1219 }
1220
1221 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1222 struct ieee80211_vif *vif,
1223 struct ieee80211_sta *sta)
1224 {
1225 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1226 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1227 struct iwl_mvm_rxq_dup_data *dup_data;
1228 int i, ret, sta_id;
1229
1230 lockdep_assert_held(&mvm->mutex);
1231
1232 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1233 sta_id = iwl_mvm_find_free_sta_id(mvm,
1234 ieee80211_vif_type_p2p(vif));
1235 else
1236 sta_id = mvm_sta->sta_id;
1237
1238 if (sta_id == IWL_MVM_STATION_COUNT)
1239 return -ENOSPC;
1240
1241 spin_lock_init(&mvm_sta->lock);
1242
1243 /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1244 if (iwl_mvm_is_dqa_supported(mvm) &&
1245 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1246 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1247 goto update_fw;
1248 }
1249
1250 mvm_sta->sta_id = sta_id;
1251 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1252 mvmvif->color);
1253 mvm_sta->vif = vif;
1254 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1255 mvm_sta->tx_protection = 0;
1256 mvm_sta->tt_tx_protection = false;
1257
1258 /* HW restart, don't assume the memory has been zeroed */
1259 atomic_set(&mvm->pending_frames[sta_id], 0);
1260 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1261 mvm_sta->tfd_queue_msk = 0;
1262
1263 /*
1264 * Allocate new queues for a TDLS station, unless we're in DQA mode,
1265 * and then they'll be allocated dynamically
1266 */
1267 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1268 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1269 if (ret)
1270 return ret;
1271 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1272 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1273 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1274 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1275 }
1276
1277 /* for HW restart - reset everything but the sequence number */
1278 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1279 u16 seq = mvm_sta->tid_data[i].seq_number;
1280 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1281 mvm_sta->tid_data[i].seq_number = seq;
1282
1283 if (!iwl_mvm_is_dqa_supported(mvm))
1284 continue;
1285
1286 /*
1287 * Mark all queues for this STA as unallocated and defer TX
1288 * frames until the queue is allocated
1289 */
1290 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1291 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1292 }
1293 mvm_sta->deferred_traffic_tid_map = 0;
1294 mvm_sta->agg_tids = 0;
1295
1296 if (iwl_mvm_has_new_rx_api(mvm) &&
1297 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1298 dup_data = kcalloc(mvm->trans->num_rx_queues,
1299 sizeof(*dup_data),
1300 GFP_KERNEL);
1301 if (!dup_data)
1302 return -ENOMEM;
1303 mvm_sta->dup_data = dup_data;
1304 }
1305
1306 if (iwl_mvm_is_dqa_supported(mvm)) {
1307 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1308 ieee80211_vif_type_p2p(vif));
1309 if (ret)
1310 goto err;
1311 }
1312
1313 update_fw:
1314 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1315 if (ret)
1316 goto err;
1317
1318 if (vif->type == NL80211_IFTYPE_STATION) {
1319 if (!sta->tdls) {
1320 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
1321 mvmvif->ap_sta_id = sta_id;
1322 } else {
1323 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
1324 }
1325 }
1326
1327 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1328
1329 return 0;
1330
1331 err:
1332 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1333 iwl_mvm_tdls_sta_deinit(mvm, sta);
1334 return ret;
1335 }
1336
1337 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1338 bool drain)
1339 {
1340 struct iwl_mvm_add_sta_cmd cmd = {};
1341 int ret;
1342 u32 status;
1343
1344 lockdep_assert_held(&mvm->mutex);
1345
1346 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1347 cmd.sta_id = mvmsta->sta_id;
1348 cmd.add_modify = STA_MODE_MODIFY;
1349 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1350 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1351
1352 status = ADD_STA_SUCCESS;
1353 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1354 iwl_mvm_add_sta_cmd_size(mvm),
1355 &cmd, &status);
1356 if (ret)
1357 return ret;
1358
1359 switch (status & IWL_ADD_STA_STATUS_MASK) {
1360 case ADD_STA_SUCCESS:
1361 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1362 mvmsta->sta_id);
1363 break;
1364 default:
1365 ret = -EIO;
1366 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1367 mvmsta->sta_id);
1368 break;
1369 }
1370
1371 return ret;
1372 }
1373
1374 /*
1375 * Remove a station from the FW table. Before sending the command to remove
1376 * the station validate that the station is indeed known to the driver (sanity
1377 * only).
1378 */
1379 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1380 {
1381 struct ieee80211_sta *sta;
1382 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1383 .sta_id = sta_id,
1384 };
1385 int ret;
1386
1387 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1388 lockdep_is_held(&mvm->mutex));
1389
1390 /* Note: internal stations are marked as error values */
1391 if (!sta) {
1392 IWL_ERR(mvm, "Invalid station id\n");
1393 return -EINVAL;
1394 }
1395
1396 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1397 sizeof(rm_sta_cmd), &rm_sta_cmd);
1398 if (ret) {
1399 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1400 return ret;
1401 }
1402
1403 return 0;
1404 }
1405
1406 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1407 {
1408 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1409 u8 sta_id;
1410
1411 /*
1412 * The mutex is needed because of the SYNC cmd, but not only: if the
1413 * work would run concurrently with iwl_mvm_rm_sta, it would run before
1414 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1415 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1416 * that later.
1417 */
1418 mutex_lock(&mvm->mutex);
1419
1420 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1421 int ret;
1422 struct ieee80211_sta *sta =
1423 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1424 lockdep_is_held(&mvm->mutex));
1425
1426 /*
1427 * This station is in use or RCU-removed; the latter happens in
1428 * managed mode, where mac80211 removes the station before we
1429 * can remove it from firmware (we can only do that after the
1430 * MAC is marked unassociated), and possibly while the deauth
1431 * frame to disconnect from the AP is still queued. Then, the
1432 * station pointer is -ENOENT when the last skb is reclaimed.
1433 */
1434 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1435 continue;
1436
1437 if (PTR_ERR(sta) == -EINVAL) {
1438 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1439 sta_id);
1440 continue;
1441 }
1442
1443 if (!sta) {
1444 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1445 sta_id);
1446 continue;
1447 }
1448
1449 WARN_ON(PTR_ERR(sta) != -EBUSY);
1450 /* This station was removed and we waited until it got drained,
1451 * we can now proceed and remove it.
1452 */
1453 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1454 if (ret) {
1455 IWL_ERR(mvm,
1456 "Couldn't remove sta %d after it was drained\n",
1457 sta_id);
1458 continue;
1459 }
1460 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1461 clear_bit(sta_id, mvm->sta_drained);
1462
1463 if (mvm->tfd_drained[sta_id]) {
1464 unsigned long i, msk = mvm->tfd_drained[sta_id];
1465
1466 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1467 iwl_mvm_disable_txq(mvm, i, i,
1468 IWL_MAX_TID_COUNT, 0);
1469
1470 mvm->tfd_drained[sta_id] = 0;
1471 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1472 sta_id, msk);
1473 }
1474 }
1475
1476 mutex_unlock(&mvm->mutex);
1477 }
1478
1479 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1480 struct ieee80211_vif *vif,
1481 struct iwl_mvm_sta *mvm_sta)
1482 {
1483 int ac;
1484 int i;
1485
1486 lockdep_assert_held(&mvm->mutex);
1487
1488 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1489 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
1490 continue;
1491
1492 ac = iwl_mvm_tid_to_ac_queue(i);
1493 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1494 vif->hw_queue[ac], i, 0);
1495 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1496 }
1497 }
1498
1499 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1500 struct ieee80211_vif *vif,
1501 struct ieee80211_sta *sta)
1502 {
1503 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1504 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1505 u8 sta_id = mvm_sta->sta_id;
1506 int ret;
1507
1508 lockdep_assert_held(&mvm->mutex);
1509
1510 if (iwl_mvm_has_new_rx_api(mvm))
1511 kfree(mvm_sta->dup_data);
1512
1513 if ((vif->type == NL80211_IFTYPE_STATION &&
1514 mvmvif->ap_sta_id == sta_id) ||
1515 iwl_mvm_is_dqa_supported(mvm)){
1516 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1517 if (ret)
1518 return ret;
1519 /* flush its queues here since we are freeing mvm_sta */
1520 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1521 if (ret)
1522 return ret;
1523 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1524 mvm_sta->tfd_queue_msk);
1525 if (ret)
1526 return ret;
1527 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1528
1529 /* If DQA is supported - the queues can be disabled now */
1530 if (iwl_mvm_is_dqa_supported(mvm)) {
1531 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1532 /*
1533 * If pending_frames is set at this point - it must be
1534 * driver internal logic error, since queues are empty
1535 * and removed successuly.
1536 * warn on it but set it to 0 anyway to avoid station
1537 * not being removed later in the function
1538 */
1539 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1540 }
1541
1542 /* If there is a TXQ still marked as reserved - free it */
1543 if (iwl_mvm_is_dqa_supported(mvm) &&
1544 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1545 u8 reserved_txq = mvm_sta->reserved_queue;
1546 enum iwl_mvm_queue_status *status;
1547
1548 /*
1549 * If no traffic has gone through the reserved TXQ - it
1550 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1551 * should be manually marked as free again
1552 */
1553 spin_lock_bh(&mvm->queue_info_lock);
1554 status = &mvm->queue_info[reserved_txq].status;
1555 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1556 (*status != IWL_MVM_QUEUE_FREE),
1557 "sta_id %d reserved txq %d status %d",
1558 sta_id, reserved_txq, *status)) {
1559 spin_unlock_bh(&mvm->queue_info_lock);
1560 return -EINVAL;
1561 }
1562
1563 *status = IWL_MVM_QUEUE_FREE;
1564 spin_unlock_bh(&mvm->queue_info_lock);
1565 }
1566
1567 if (vif->type == NL80211_IFTYPE_STATION &&
1568 mvmvif->ap_sta_id == sta_id) {
1569 /* if associated - we can't remove the AP STA now */
1570 if (vif->bss_conf.assoc)
1571 return ret;
1572
1573 /* unassoc - go ahead - remove the AP STA now */
1574 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1575
1576 /* clear d0i3_ap_sta_id if no longer relevant */
1577 if (mvm->d0i3_ap_sta_id == sta_id)
1578 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1579 }
1580 }
1581
1582 /*
1583 * This shouldn't happen - the TDLS channel switch should be canceled
1584 * before the STA is removed.
1585 */
1586 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1587 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
1588 cancel_delayed_work(&mvm->tdls_cs.dwork);
1589 }
1590
1591 /*
1592 * Make sure that the tx response code sees the station as -EBUSY and
1593 * calls the drain worker.
1594 */
1595 spin_lock_bh(&mvm_sta->lock);
1596
1597 /*
1598 * There are frames pending on the AC queues for this station.
1599 * We need to wait until all the frames are drained...
1600 */
1601 if (atomic_read(&mvm->pending_frames[sta_id])) {
1602 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1603 ERR_PTR(-EBUSY));
1604 spin_unlock_bh(&mvm_sta->lock);
1605
1606 /* disable TDLS sta queues on drain complete */
1607 if (sta->tdls) {
1608 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1609 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1610 }
1611
1612 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1613 } else {
1614 spin_unlock_bh(&mvm_sta->lock);
1615
1616 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1617 iwl_mvm_tdls_sta_deinit(mvm, sta);
1618
1619 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1620 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1621 }
1622
1623 return ret;
1624 }
1625
1626 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1627 struct ieee80211_vif *vif,
1628 u8 sta_id)
1629 {
1630 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1631
1632 lockdep_assert_held(&mvm->mutex);
1633
1634 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1635 return ret;
1636 }
1637
1638 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1639 struct iwl_mvm_int_sta *sta,
1640 u32 qmask, enum nl80211_iftype iftype)
1641 {
1642 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1643 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1644 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
1645 return -ENOSPC;
1646 }
1647
1648 sta->tfd_queue_msk = qmask;
1649
1650 /* put a non-NULL value so iterating over the stations won't stop */
1651 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1652 return 0;
1653 }
1654
1655 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
1656 struct iwl_mvm_int_sta *sta)
1657 {
1658 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1659 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1660 sta->sta_id = IWL_MVM_STATION_COUNT;
1661 }
1662
1663 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1664 struct iwl_mvm_int_sta *sta,
1665 const u8 *addr,
1666 u16 mac_id, u16 color)
1667 {
1668 struct iwl_mvm_add_sta_cmd cmd;
1669 int ret;
1670 u32 status;
1671
1672 lockdep_assert_held(&mvm->mutex);
1673
1674 memset(&cmd, 0, sizeof(cmd));
1675 cmd.sta_id = sta->sta_id;
1676 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1677 color));
1678
1679 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1680 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1681
1682 if (addr)
1683 memcpy(cmd.addr, addr, ETH_ALEN);
1684
1685 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1686 iwl_mvm_add_sta_cmd_size(mvm),
1687 &cmd, &status);
1688 if (ret)
1689 return ret;
1690
1691 switch (status & IWL_ADD_STA_STATUS_MASK) {
1692 case ADD_STA_SUCCESS:
1693 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1694 return 0;
1695 default:
1696 ret = -EIO;
1697 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1698 status);
1699 break;
1700 }
1701 return ret;
1702 }
1703
1704 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1705 {
1706 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1707 mvm->cfg->base_params->wd_timeout :
1708 IWL_WATCHDOG_DISABLED;
1709 int ret;
1710
1711 lockdep_assert_held(&mvm->mutex);
1712
1713 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1714 if (!iwl_mvm_is_dqa_supported(mvm))
1715 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1716 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1717
1718 /* Allocate aux station and assign to it the aux queue */
1719 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1720 NL80211_IFTYPE_UNSPECIFIED);
1721 if (ret)
1722 return ret;
1723
1724 if (iwl_mvm_is_dqa_supported(mvm)) {
1725 struct iwl_trans_txq_scd_cfg cfg = {
1726 .fifo = IWL_MVM_TX_FIFO_MCAST,
1727 .sta_id = mvm->aux_sta.sta_id,
1728 .tid = IWL_MAX_TID_COUNT,
1729 .aggregate = false,
1730 .frame_limit = IWL_FRAME_LIMIT,
1731 };
1732
1733 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1734 wdg_timeout);
1735 }
1736
1737 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1738 MAC_INDEX_AUX, 0);
1739
1740 if (ret)
1741 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1742 return ret;
1743 }
1744
1745 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1746 {
1747 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1748
1749 lockdep_assert_held(&mvm->mutex);
1750 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1751 mvmvif->id, 0);
1752 }
1753
1754 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1755 {
1756 int ret;
1757
1758 lockdep_assert_held(&mvm->mutex);
1759
1760 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1761 if (ret)
1762 IWL_WARN(mvm, "Failed sending remove station\n");
1763
1764 return ret;
1765 }
1766
1767 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1768 {
1769 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1770 }
1771
1772 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1773 {
1774 lockdep_assert_held(&mvm->mutex);
1775
1776 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1777 }
1778
1779 /*
1780 * Send the add station command for the vif's broadcast station.
1781 * Assumes that the station was already allocated.
1782 *
1783 * @mvm: the mvm component
1784 * @vif: the interface to which the broadcast station is added
1785 * @bsta: the broadcast station to add.
1786 */
1787 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1788 {
1789 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1790 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1791 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1792 const u8 *baddr = _baddr;
1793 int ret;
1794
1795 lockdep_assert_held(&mvm->mutex);
1796
1797 if (iwl_mvm_is_dqa_supported(mvm)) {
1798 struct iwl_trans_txq_scd_cfg cfg = {
1799 .fifo = IWL_MVM_TX_FIFO_VO,
1800 .sta_id = mvmvif->bcast_sta.sta_id,
1801 .tid = IWL_MAX_TID_COUNT,
1802 .aggregate = false,
1803 .frame_limit = IWL_FRAME_LIMIT,
1804 };
1805 unsigned int wdg_timeout =
1806 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1807 int queue;
1808
1809 if (vif->type == NL80211_IFTYPE_AP ||
1810 vif->type == NL80211_IFTYPE_ADHOC)
1811 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1812 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1813 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1814 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1815 return -EINVAL;
1816
1817 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1818 wdg_timeout);
1819 bsta->tfd_queue_msk |= BIT(queue);
1820 }
1821
1822 if (vif->type == NL80211_IFTYPE_ADHOC)
1823 baddr = vif->bss_conf.bssid;
1824
1825 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1826 return -ENOSPC;
1827
1828 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1829 mvmvif->id, mvmvif->color);
1830 if (ret)
1831 return ret;
1832
1833 /*
1834 * In AP vif type, we also need to enable the cab_queue. However, we
1835 * have to enable it after the ADD_STA command is sent, otherwise the
1836 * FW will throw an assert once we send the ADD_STA command (it'll
1837 * detect a mismatch in the tfd_queue_msk, as we can't add the
1838 * enabled-cab_queue to the mask)
1839 */
1840 if (iwl_mvm_is_dqa_supported(mvm) &&
1841 (vif->type == NL80211_IFTYPE_AP ||
1842 vif->type == NL80211_IFTYPE_ADHOC)) {
1843 struct iwl_trans_txq_scd_cfg cfg = {
1844 .fifo = IWL_MVM_TX_FIFO_MCAST,
1845 .sta_id = mvmvif->bcast_sta.sta_id,
1846 .tid = IWL_MAX_TID_COUNT,
1847 .aggregate = false,
1848 .frame_limit = IWL_FRAME_LIMIT,
1849 };
1850 unsigned int wdg_timeout =
1851 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1852
1853 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue,
1854 0, &cfg, wdg_timeout);
1855 }
1856
1857 return 0;
1858 }
1859
1860 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1861 struct ieee80211_vif *vif)
1862 {
1863 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1864
1865 lockdep_assert_held(&mvm->mutex);
1866
1867 if (vif->type == NL80211_IFTYPE_AP ||
1868 vif->type == NL80211_IFTYPE_ADHOC)
1869 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
1870 IWL_MAX_TID_COUNT, 0);
1871
1872 if (mvmvif->bcast_sta.tfd_queue_msk &
1873 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)) {
1874 iwl_mvm_disable_txq(mvm,
1875 IWL_MVM_DQA_AP_PROBE_RESP_QUEUE,
1876 vif->hw_queue[0], IWL_MAX_TID_COUNT,
1877 0);
1878 mvmvif->bcast_sta.tfd_queue_msk &=
1879 ~BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1880 }
1881
1882 if (mvmvif->bcast_sta.tfd_queue_msk &
1883 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)) {
1884 iwl_mvm_disable_txq(mvm,
1885 IWL_MVM_DQA_P2P_DEVICE_QUEUE,
1886 vif->hw_queue[0], IWL_MAX_TID_COUNT,
1887 0);
1888 mvmvif->bcast_sta.tfd_queue_msk &=
1889 ~BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1890 }
1891 }
1892
1893 /* Send the FW a request to remove the station from it's internal data
1894 * structures, but DO NOT remove the entry from the local data structures. */
1895 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1896 {
1897 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1898 int ret;
1899
1900 lockdep_assert_held(&mvm->mutex);
1901
1902 if (iwl_mvm_is_dqa_supported(mvm))
1903 iwl_mvm_free_bcast_sta_queues(mvm, vif);
1904
1905 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1906 if (ret)
1907 IWL_WARN(mvm, "Failed sending remove station\n");
1908 return ret;
1909 }
1910
1911 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1912 {
1913 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1914 u32 qmask = 0;
1915
1916 lockdep_assert_held(&mvm->mutex);
1917
1918 if (!iwl_mvm_is_dqa_supported(mvm)) {
1919 qmask = iwl_mvm_mac_get_queues_mask(vif);
1920
1921 /*
1922 * The firmware defines the TFD queue mask to only be relevant
1923 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1924 * be included. This only happens in NL80211_IFTYPE_AP vif type,
1925 * so the next line will only have an effect there.
1926 */
1927 qmask &= ~BIT(vif->cab_queue);
1928 }
1929
1930 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1931 ieee80211_vif_type_p2p(vif));
1932 }
1933
1934 /* Allocate a new station entry for the broadcast station to the given vif,
1935 * and send it to the FW.
1936 * Note that each P2P mac should have its own broadcast station.
1937 *
1938 * @mvm: the mvm component
1939 * @vif: the interface to which the broadcast station is added
1940 * @bsta: the broadcast station to add. */
1941 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1942 {
1943 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1944 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1945 int ret;
1946
1947 lockdep_assert_held(&mvm->mutex);
1948
1949 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1950 if (ret)
1951 return ret;
1952
1953 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1954
1955 if (ret)
1956 iwl_mvm_dealloc_int_sta(mvm, bsta);
1957
1958 return ret;
1959 }
1960
1961 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1962 {
1963 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1964
1965 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1966 }
1967
1968 /*
1969 * Send the FW a request to remove the station from it's internal data
1970 * structures, and in addition remove it from the local data structure.
1971 */
1972 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1973 {
1974 int ret;
1975
1976 lockdep_assert_held(&mvm->mutex);
1977
1978 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1979
1980 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1981
1982 return ret;
1983 }
1984
1985 #define IWL_MAX_RX_BA_SESSIONS 16
1986
1987 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1988 {
1989 struct iwl_mvm_delba_notif notif = {
1990 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1991 .metadata.sync = 1,
1992 .delba.baid = baid,
1993 };
1994 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1995 };
1996
1997 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1998 struct iwl_mvm_baid_data *data)
1999 {
2000 int i;
2001
2002 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2003
2004 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2005 int j;
2006 struct iwl_mvm_reorder_buffer *reorder_buf =
2007 &data->reorder_buf[i];
2008
2009 spin_lock_bh(&reorder_buf->lock);
2010 if (likely(!reorder_buf->num_stored)) {
2011 spin_unlock_bh(&reorder_buf->lock);
2012 continue;
2013 }
2014
2015 /*
2016 * This shouldn't happen in regular DELBA since the internal
2017 * delBA notification should trigger a release of all frames in
2018 * the reorder buffer.
2019 */
2020 WARN_ON(1);
2021
2022 for (j = 0; j < reorder_buf->buf_size; j++)
2023 __skb_queue_purge(&reorder_buf->entries[j]);
2024 /*
2025 * Prevent timer re-arm. This prevents a very far fetched case
2026 * where we timed out on the notification. There may be prior
2027 * RX frames pending in the RX queue before the notification
2028 * that might get processed between now and the actual deletion
2029 * and we would re-arm the timer although we are deleting the
2030 * reorder buffer.
2031 */
2032 reorder_buf->removed = true;
2033 spin_unlock_bh(&reorder_buf->lock);
2034 del_timer_sync(&reorder_buf->reorder_timer);
2035 }
2036 }
2037
2038 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2039 u32 sta_id,
2040 struct iwl_mvm_baid_data *data,
2041 u16 ssn, u8 buf_size)
2042 {
2043 int i;
2044
2045 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2046 struct iwl_mvm_reorder_buffer *reorder_buf =
2047 &data->reorder_buf[i];
2048 int j;
2049
2050 reorder_buf->num_stored = 0;
2051 reorder_buf->head_sn = ssn;
2052 reorder_buf->buf_size = buf_size;
2053 /* rx reorder timer */
2054 reorder_buf->reorder_timer.function =
2055 iwl_mvm_reorder_timer_expired;
2056 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2057 init_timer(&reorder_buf->reorder_timer);
2058 spin_lock_init(&reorder_buf->lock);
2059 reorder_buf->mvm = mvm;
2060 reorder_buf->queue = i;
2061 reorder_buf->sta_id = sta_id;
2062 for (j = 0; j < reorder_buf->buf_size; j++)
2063 __skb_queue_head_init(&reorder_buf->entries[j]);
2064 }
2065 }
2066
2067 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2068 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2069 {
2070 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2071 struct iwl_mvm_add_sta_cmd cmd = {};
2072 struct iwl_mvm_baid_data *baid_data = NULL;
2073 int ret;
2074 u32 status;
2075
2076 lockdep_assert_held(&mvm->mutex);
2077
2078 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2079 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2080 return -ENOSPC;
2081 }
2082
2083 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2084 /*
2085 * Allocate here so if allocation fails we can bail out early
2086 * before starting the BA session in the firmware
2087 */
2088 baid_data = kzalloc(sizeof(*baid_data) +
2089 mvm->trans->num_rx_queues *
2090 sizeof(baid_data->reorder_buf[0]),
2091 GFP_KERNEL);
2092 if (!baid_data)
2093 return -ENOMEM;
2094 }
2095
2096 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2097 cmd.sta_id = mvm_sta->sta_id;
2098 cmd.add_modify = STA_MODE_MODIFY;
2099 if (start) {
2100 cmd.add_immediate_ba_tid = (u8) tid;
2101 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2102 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2103 } else {
2104 cmd.remove_immediate_ba_tid = (u8) tid;
2105 }
2106 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2107 STA_MODIFY_REMOVE_BA_TID;
2108
2109 status = ADD_STA_SUCCESS;
2110 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2111 iwl_mvm_add_sta_cmd_size(mvm),
2112 &cmd, &status);
2113 if (ret)
2114 goto out_free;
2115
2116 switch (status & IWL_ADD_STA_STATUS_MASK) {
2117 case ADD_STA_SUCCESS:
2118 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2119 start ? "start" : "stopp");
2120 break;
2121 case ADD_STA_IMMEDIATE_BA_FAILURE:
2122 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2123 ret = -ENOSPC;
2124 break;
2125 default:
2126 ret = -EIO;
2127 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2128 start ? "start" : "stopp", status);
2129 break;
2130 }
2131
2132 if (ret)
2133 goto out_free;
2134
2135 if (start) {
2136 u8 baid;
2137
2138 mvm->rx_ba_sessions++;
2139
2140 if (!iwl_mvm_has_new_rx_api(mvm))
2141 return 0;
2142
2143 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2144 ret = -EINVAL;
2145 goto out_free;
2146 }
2147 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2148 IWL_ADD_STA_BAID_SHIFT);
2149 baid_data->baid = baid;
2150 baid_data->timeout = timeout;
2151 baid_data->last_rx = jiffies;
2152 setup_timer(&baid_data->session_timer,
2153 iwl_mvm_rx_agg_session_expired,
2154 (unsigned long)&mvm->baid_map[baid]);
2155 baid_data->mvm = mvm;
2156 baid_data->tid = tid;
2157 baid_data->sta_id = mvm_sta->sta_id;
2158
2159 mvm_sta->tid_to_baid[tid] = baid;
2160 if (timeout)
2161 mod_timer(&baid_data->session_timer,
2162 TU_TO_EXP_TIME(timeout * 2));
2163
2164 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2165 baid_data, ssn, buf_size);
2166 /*
2167 * protect the BA data with RCU to cover a case where our
2168 * internal RX sync mechanism will timeout (not that it's
2169 * supposed to happen) and we will free the session data while
2170 * RX is being processed in parallel
2171 */
2172 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2173 mvm_sta->sta_id, tid, baid);
2174 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2175 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2176 } else {
2177 u8 baid = mvm_sta->tid_to_baid[tid];
2178
2179 if (mvm->rx_ba_sessions > 0)
2180 /* check that restart flow didn't zero the counter */
2181 mvm->rx_ba_sessions--;
2182 if (!iwl_mvm_has_new_rx_api(mvm))
2183 return 0;
2184
2185 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2186 return -EINVAL;
2187
2188 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2189 if (WARN_ON(!baid_data))
2190 return -EINVAL;
2191
2192 /* synchronize all rx queues so we can safely delete */
2193 iwl_mvm_free_reorder(mvm, baid_data);
2194 del_timer_sync(&baid_data->session_timer);
2195 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2196 kfree_rcu(baid_data, rcu_head);
2197 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2198 }
2199 return 0;
2200
2201 out_free:
2202 kfree(baid_data);
2203 return ret;
2204 }
2205
2206 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2207 int tid, u8 queue, bool start)
2208 {
2209 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2210 struct iwl_mvm_add_sta_cmd cmd = {};
2211 int ret;
2212 u32 status;
2213
2214 lockdep_assert_held(&mvm->mutex);
2215
2216 if (start) {
2217 mvm_sta->tfd_queue_msk |= BIT(queue);
2218 mvm_sta->tid_disable_agg &= ~BIT(tid);
2219 } else {
2220 /* In DQA-mode the queue isn't removed on agg termination */
2221 if (!iwl_mvm_is_dqa_supported(mvm))
2222 mvm_sta->tfd_queue_msk &= ~BIT(queue);
2223 mvm_sta->tid_disable_agg |= BIT(tid);
2224 }
2225
2226 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2227 cmd.sta_id = mvm_sta->sta_id;
2228 cmd.add_modify = STA_MODE_MODIFY;
2229 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
2230 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2231 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2232
2233 status = ADD_STA_SUCCESS;
2234 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2235 iwl_mvm_add_sta_cmd_size(mvm),
2236 &cmd, &status);
2237 if (ret)
2238 return ret;
2239
2240 switch (status & IWL_ADD_STA_STATUS_MASK) {
2241 case ADD_STA_SUCCESS:
2242 break;
2243 default:
2244 ret = -EIO;
2245 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2246 start ? "start" : "stopp", status);
2247 break;
2248 }
2249
2250 return ret;
2251 }
2252
2253 const u8 tid_to_mac80211_ac[] = {
2254 IEEE80211_AC_BE,
2255 IEEE80211_AC_BK,
2256 IEEE80211_AC_BK,
2257 IEEE80211_AC_BE,
2258 IEEE80211_AC_VI,
2259 IEEE80211_AC_VI,
2260 IEEE80211_AC_VO,
2261 IEEE80211_AC_VO,
2262 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2263 };
2264
2265 static const u8 tid_to_ucode_ac[] = {
2266 AC_BE,
2267 AC_BK,
2268 AC_BK,
2269 AC_BE,
2270 AC_VI,
2271 AC_VI,
2272 AC_VO,
2273 AC_VO,
2274 };
2275
2276 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2277 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2278 {
2279 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2280 struct iwl_mvm_tid_data *tid_data;
2281 int txq_id;
2282 int ret;
2283
2284 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2285 return -EINVAL;
2286
2287 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2288 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2289 mvmsta->tid_data[tid].state);
2290 return -ENXIO;
2291 }
2292
2293 lockdep_assert_held(&mvm->mutex);
2294
2295 spin_lock_bh(&mvmsta->lock);
2296
2297 /* possible race condition - we entered D0i3 while starting agg */
2298 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2299 spin_unlock_bh(&mvmsta->lock);
2300 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2301 return -EIO;
2302 }
2303
2304 spin_lock(&mvm->queue_info_lock);
2305
2306 /*
2307 * Note the possible cases:
2308 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2309 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2310 * one and mark it as reserved
2311 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
2312 * non-DQA mode, since the TXQ hasn't yet been allocated
2313 */
2314 txq_id = mvmsta->tid_data[tid].txq_id;
2315 if (iwl_mvm_is_dqa_supported(mvm) &&
2316 unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED)) {
2317 ret = -ENXIO;
2318 IWL_DEBUG_TX_QUEUES(mvm,
2319 "Can't start tid %d agg on shared queue!\n",
2320 tid);
2321 goto release_locks;
2322 } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2323 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2324 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2325 mvm->first_agg_queue,
2326 mvm->last_agg_queue);
2327 if (txq_id < 0) {
2328 ret = txq_id;
2329 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2330 goto release_locks;
2331 }
2332 /*
2333 * TXQ shouldn't be in inactive mode for non-DQA, so getting
2334 * an inactive queue from iwl_mvm_find_free_queue() is
2335 * certainly a bug
2336 */
2337 WARN_ON(mvm->queue_info[txq_id].status ==
2338 IWL_MVM_QUEUE_INACTIVE);
2339
2340 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2341 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2342 }
2343
2344 spin_unlock(&mvm->queue_info_lock);
2345
2346 IWL_DEBUG_TX_QUEUES(mvm,
2347 "AGG for tid %d will be on queue #%d\n",
2348 tid, txq_id);
2349
2350 tid_data = &mvmsta->tid_data[tid];
2351 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2352 tid_data->txq_id = txq_id;
2353 *ssn = tid_data->ssn;
2354
2355 IWL_DEBUG_TX_QUEUES(mvm,
2356 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2357 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2358 tid_data->next_reclaimed);
2359
2360 if (tid_data->ssn == tid_data->next_reclaimed) {
2361 tid_data->state = IWL_AGG_STARTING;
2362 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2363 } else {
2364 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2365 }
2366
2367 ret = 0;
2368 goto out;
2369
2370 release_locks:
2371 spin_unlock(&mvm->queue_info_lock);
2372 out:
2373 spin_unlock_bh(&mvmsta->lock);
2374
2375 return ret;
2376 }
2377
2378 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2379 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2380 bool amsdu)
2381 {
2382 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2383 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2384 unsigned int wdg_timeout =
2385 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2386 int queue, ret;
2387 bool alloc_queue = true;
2388 enum iwl_mvm_queue_status queue_status;
2389 u16 ssn;
2390
2391 struct iwl_trans_txq_scd_cfg cfg = {
2392 .sta_id = mvmsta->sta_id,
2393 .tid = tid,
2394 .frame_limit = buf_size,
2395 .aggregate = true,
2396 };
2397
2398 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2399 != IWL_MAX_TID_COUNT);
2400
2401 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2402
2403 spin_lock_bh(&mvmsta->lock);
2404 ssn = tid_data->ssn;
2405 queue = tid_data->txq_id;
2406 tid_data->state = IWL_AGG_ON;
2407 mvmsta->agg_tids |= BIT(tid);
2408 tid_data->ssn = 0xffff;
2409 tid_data->amsdu_in_ampdu_allowed = amsdu;
2410 spin_unlock_bh(&mvmsta->lock);
2411
2412 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2413
2414 spin_lock_bh(&mvm->queue_info_lock);
2415 queue_status = mvm->queue_info[queue].status;
2416 spin_unlock_bh(&mvm->queue_info_lock);
2417
2418 /* In DQA mode, the existing queue might need to be reconfigured */
2419 if (iwl_mvm_is_dqa_supported(mvm)) {
2420 /* Maybe there is no need to even alloc a queue... */
2421 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2422 alloc_queue = false;
2423
2424 /*
2425 * Only reconfig the SCD for the queue if the window size has
2426 * changed from current (become smaller)
2427 */
2428 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2429 /*
2430 * If reconfiguring an existing queue, it first must be
2431 * drained
2432 */
2433 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
2434 BIT(queue));
2435 if (ret) {
2436 IWL_ERR(mvm,
2437 "Error draining queue before reconfig\n");
2438 return ret;
2439 }
2440
2441 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2442 mvmsta->sta_id, tid,
2443 buf_size, ssn);
2444 if (ret) {
2445 IWL_ERR(mvm,
2446 "Error reconfiguring TXQ #%d\n", queue);
2447 return ret;
2448 }
2449 }
2450 }
2451
2452 if (alloc_queue)
2453 iwl_mvm_enable_txq(mvm, queue,
2454 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2455 &cfg, wdg_timeout);
2456
2457 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2458 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2459 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2460 if (ret)
2461 return -EIO;
2462 }
2463
2464 /* No need to mark as reserved */
2465 spin_lock_bh(&mvm->queue_info_lock);
2466 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2467 spin_unlock_bh(&mvm->queue_info_lock);
2468
2469 /*
2470 * Even though in theory the peer could have different
2471 * aggregation reorder buffer sizes for different sessions,
2472 * our ucode doesn't allow for that and has a global limit
2473 * for each station. Therefore, use the minimum of all the
2474 * aggregation sessions and our default value.
2475 */
2476 mvmsta->max_agg_bufsize =
2477 min(mvmsta->max_agg_bufsize, buf_size);
2478 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2479
2480 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2481 sta->addr, tid);
2482
2483 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2484 }
2485
2486 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2487 struct ieee80211_sta *sta, u16 tid)
2488 {
2489 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2490 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2491 u16 txq_id;
2492 int err;
2493
2494 /*
2495 * If mac80211 is cleaning its state, then say that we finished since
2496 * our state has been cleared anyway.
2497 */
2498 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2499 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2500 return 0;
2501 }
2502
2503 spin_lock_bh(&mvmsta->lock);
2504
2505 txq_id = tid_data->txq_id;
2506
2507 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2508 mvmsta->sta_id, tid, txq_id, tid_data->state);
2509
2510 mvmsta->agg_tids &= ~BIT(tid);
2511
2512 spin_lock_bh(&mvm->queue_info_lock);
2513 /*
2514 * The TXQ is marked as reserved only if no traffic came through yet
2515 * This means no traffic has been sent on this TID (agg'd or not), so
2516 * we no longer have use for the queue. Since it hasn't even been
2517 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2518 * free.
2519 */
2520 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2521 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2522
2523 spin_unlock_bh(&mvm->queue_info_lock);
2524
2525 switch (tid_data->state) {
2526 case IWL_AGG_ON:
2527 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2528
2529 IWL_DEBUG_TX_QUEUES(mvm,
2530 "ssn = %d, next_recl = %d\n",
2531 tid_data->ssn, tid_data->next_reclaimed);
2532
2533 /* There are still packets for this RA / TID in the HW */
2534 if (tid_data->ssn != tid_data->next_reclaimed) {
2535 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2536 err = 0;
2537 break;
2538 }
2539
2540 tid_data->ssn = 0xffff;
2541 tid_data->state = IWL_AGG_OFF;
2542 spin_unlock_bh(&mvmsta->lock);
2543
2544 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2545
2546 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2547
2548 if (!iwl_mvm_is_dqa_supported(mvm)) {
2549 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2550
2551 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2552 }
2553 return 0;
2554 case IWL_AGG_STARTING:
2555 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2556 /*
2557 * The agg session has been stopped before it was set up. This
2558 * can happen when the AddBA timer times out for example.
2559 */
2560
2561 /* No barriers since we are under mutex */
2562 lockdep_assert_held(&mvm->mutex);
2563
2564 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2565 tid_data->state = IWL_AGG_OFF;
2566 err = 0;
2567 break;
2568 default:
2569 IWL_ERR(mvm,
2570 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2571 mvmsta->sta_id, tid, tid_data->state);
2572 IWL_ERR(mvm,
2573 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2574 err = -EINVAL;
2575 }
2576
2577 spin_unlock_bh(&mvmsta->lock);
2578
2579 return err;
2580 }
2581
2582 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2583 struct ieee80211_sta *sta, u16 tid)
2584 {
2585 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2586 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2587 u16 txq_id;
2588 enum iwl_mvm_agg_state old_state;
2589
2590 /*
2591 * First set the agg state to OFF to avoid calling
2592 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2593 */
2594 spin_lock_bh(&mvmsta->lock);
2595 txq_id = tid_data->txq_id;
2596 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2597 mvmsta->sta_id, tid, txq_id, tid_data->state);
2598 old_state = tid_data->state;
2599 tid_data->state = IWL_AGG_OFF;
2600 mvmsta->agg_tids &= ~BIT(tid);
2601 spin_unlock_bh(&mvmsta->lock);
2602
2603 spin_lock_bh(&mvm->queue_info_lock);
2604 /*
2605 * The TXQ is marked as reserved only if no traffic came through yet
2606 * This means no traffic has been sent on this TID (agg'd or not), so
2607 * we no longer have use for the queue. Since it hasn't even been
2608 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2609 * free.
2610 */
2611 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2612 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2613 spin_unlock_bh(&mvm->queue_info_lock);
2614
2615 if (old_state >= IWL_AGG_ON) {
2616 iwl_mvm_drain_sta(mvm, mvmsta, true);
2617 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2618 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2619 iwl_trans_wait_tx_queue_empty(mvm->trans,
2620 mvmsta->tfd_queue_msk);
2621 iwl_mvm_drain_sta(mvm, mvmsta, false);
2622
2623 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2624
2625 if (!iwl_mvm_is_dqa_supported(mvm)) {
2626 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2627
2628 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2629 tid, 0);
2630 }
2631 }
2632
2633 return 0;
2634 }
2635
2636 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2637 {
2638 int i, max = -1, max_offs = -1;
2639
2640 lockdep_assert_held(&mvm->mutex);
2641
2642 /* Pick the unused key offset with the highest 'deleted'
2643 * counter. Every time a key is deleted, all the counters
2644 * are incremented and the one that was just deleted is
2645 * reset to zero. Thus, the highest counter is the one
2646 * that was deleted longest ago. Pick that one.
2647 */
2648 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2649 if (test_bit(i, mvm->fw_key_table))
2650 continue;
2651 if (mvm->fw_key_deleted[i] > max) {
2652 max = mvm->fw_key_deleted[i];
2653 max_offs = i;
2654 }
2655 }
2656
2657 if (max_offs < 0)
2658 return STA_KEY_IDX_INVALID;
2659
2660 return max_offs;
2661 }
2662
2663 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2664 struct ieee80211_vif *vif,
2665 struct ieee80211_sta *sta)
2666 {
2667 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2668
2669 if (sta)
2670 return iwl_mvm_sta_from_mac80211(sta);
2671
2672 /*
2673 * The device expects GTKs for station interfaces to be
2674 * installed as GTKs for the AP station. If we have no
2675 * station ID, then use AP's station ID.
2676 */
2677 if (vif->type == NL80211_IFTYPE_STATION &&
2678 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2679 u8 sta_id = mvmvif->ap_sta_id;
2680
2681 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2682 lockdep_is_held(&mvm->mutex));
2683
2684 /*
2685 * It is possible that the 'sta' parameter is NULL,
2686 * for example when a GTK is removed - the sta_id will then
2687 * be the AP ID, and no station was passed by mac80211.
2688 */
2689 if (IS_ERR_OR_NULL(sta))
2690 return NULL;
2691
2692 return iwl_mvm_sta_from_mac80211(sta);
2693 }
2694
2695 return NULL;
2696 }
2697
2698 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2699 struct iwl_mvm_sta *mvm_sta,
2700 struct ieee80211_key_conf *keyconf, bool mcast,
2701 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2702 u8 key_offset)
2703 {
2704 struct iwl_mvm_add_sta_key_cmd cmd = {};
2705 __le16 key_flags;
2706 int ret;
2707 u32 status;
2708 u16 keyidx;
2709 int i;
2710 u8 sta_id = mvm_sta->sta_id;
2711
2712 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2713 STA_KEY_FLG_KEYID_MSK;
2714 key_flags = cpu_to_le16(keyidx);
2715 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2716
2717 switch (keyconf->cipher) {
2718 case WLAN_CIPHER_SUITE_TKIP:
2719 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2720 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
2721 for (i = 0; i < 5; i++)
2722 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
2723 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2724 break;
2725 case WLAN_CIPHER_SUITE_CCMP:
2726 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2727 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2728 break;
2729 case WLAN_CIPHER_SUITE_WEP104:
2730 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2731 /* fall through */
2732 case WLAN_CIPHER_SUITE_WEP40:
2733 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2734 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
2735 break;
2736 case WLAN_CIPHER_SUITE_GCMP_256:
2737 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2738 /* fall through */
2739 case WLAN_CIPHER_SUITE_GCMP:
2740 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2741 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2742 break;
2743 default:
2744 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2745 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2746 }
2747
2748 if (mcast)
2749 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2750
2751 cmd.key_offset = key_offset;
2752 cmd.key_flags = key_flags;
2753 cmd.sta_id = sta_id;
2754
2755 status = ADD_STA_SUCCESS;
2756 if (cmd_flags & CMD_ASYNC)
2757 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
2758 sizeof(cmd), &cmd);
2759 else
2760 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2761 &cmd, &status);
2762
2763 switch (status) {
2764 case ADD_STA_SUCCESS:
2765 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2766 break;
2767 default:
2768 ret = -EIO;
2769 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2770 break;
2771 }
2772
2773 return ret;
2774 }
2775
2776 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2777 struct ieee80211_key_conf *keyconf,
2778 u8 sta_id, bool remove_key)
2779 {
2780 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2781
2782 /* verify the key details match the required command's expectations */
2783 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2784 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
2785 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
2786 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
2787 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
2788 return -EINVAL;
2789
2790 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
2791 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
2792 return -EINVAL;
2793
2794 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2795 igtk_cmd.sta_id = cpu_to_le32(sta_id);
2796
2797 if (remove_key) {
2798 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2799 } else {
2800 struct ieee80211_key_seq seq;
2801 const u8 *pn;
2802
2803 switch (keyconf->cipher) {
2804 case WLAN_CIPHER_SUITE_AES_CMAC:
2805 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2806 break;
2807 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2808 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2809 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
2810 break;
2811 default:
2812 return -EINVAL;
2813 }
2814
2815 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
2816 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
2817 igtk_cmd.ctrl_flags |=
2818 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
2819 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2820 pn = seq.aes_cmac.pn;
2821 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
2822 ((u64) pn[4] << 8) |
2823 ((u64) pn[3] << 16) |
2824 ((u64) pn[2] << 24) |
2825 ((u64) pn[1] << 32) |
2826 ((u64) pn[0] << 40));
2827 }
2828
2829 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
2830 remove_key ? "removing" : "installing",
2831 igtk_cmd.sta_id);
2832
2833 if (!iwl_mvm_has_new_rx_api(mvm)) {
2834 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
2835 .ctrl_flags = igtk_cmd.ctrl_flags,
2836 .key_id = igtk_cmd.key_id,
2837 .sta_id = igtk_cmd.sta_id,
2838 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
2839 };
2840
2841 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
2842 ARRAY_SIZE(igtk_cmd_v1.igtk));
2843 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2844 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
2845 }
2846 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2847 sizeof(igtk_cmd), &igtk_cmd);
2848 }
2849
2850
2851 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
2852 struct ieee80211_vif *vif,
2853 struct ieee80211_sta *sta)
2854 {
2855 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2856
2857 if (sta)
2858 return sta->addr;
2859
2860 if (vif->type == NL80211_IFTYPE_STATION &&
2861 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2862 u8 sta_id = mvmvif->ap_sta_id;
2863 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2864 lockdep_is_held(&mvm->mutex));
2865 return sta->addr;
2866 }
2867
2868
2869 return NULL;
2870 }
2871
2872 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2873 struct ieee80211_vif *vif,
2874 struct ieee80211_sta *sta,
2875 struct ieee80211_key_conf *keyconf,
2876 u8 key_offset,
2877 bool mcast)
2878 {
2879 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2880 int ret;
2881 const u8 *addr;
2882 struct ieee80211_key_seq seq;
2883 u16 p1k[5];
2884
2885 switch (keyconf->cipher) {
2886 case WLAN_CIPHER_SUITE_TKIP:
2887 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2888 /* get phase 1 key from mac80211 */
2889 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2890 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2891 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2892 seq.tkip.iv32, p1k, 0, key_offset);
2893 break;
2894 case WLAN_CIPHER_SUITE_CCMP:
2895 case WLAN_CIPHER_SUITE_WEP40:
2896 case WLAN_CIPHER_SUITE_WEP104:
2897 case WLAN_CIPHER_SUITE_GCMP:
2898 case WLAN_CIPHER_SUITE_GCMP_256:
2899 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2900 0, NULL, 0, key_offset);
2901 break;
2902 default:
2903 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2904 0, NULL, 0, key_offset);
2905 }
2906
2907 return ret;
2908 }
2909
2910 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2911 struct ieee80211_key_conf *keyconf,
2912 bool mcast)
2913 {
2914 struct iwl_mvm_add_sta_key_cmd cmd = {};
2915 __le16 key_flags;
2916 int ret;
2917 u32 status;
2918
2919 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2920 STA_KEY_FLG_KEYID_MSK);
2921 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2922 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2923
2924 if (mcast)
2925 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2926
2927 cmd.key_flags = key_flags;
2928 cmd.key_offset = keyconf->hw_key_idx;
2929 cmd.sta_id = sta_id;
2930
2931 status = ADD_STA_SUCCESS;
2932 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2933 &cmd, &status);
2934
2935 switch (status) {
2936 case ADD_STA_SUCCESS:
2937 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2938 break;
2939 default:
2940 ret = -EIO;
2941 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2942 break;
2943 }
2944
2945 return ret;
2946 }
2947
2948 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2949 struct ieee80211_vif *vif,
2950 struct ieee80211_sta *sta,
2951 struct ieee80211_key_conf *keyconf,
2952 u8 key_offset)
2953 {
2954 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2955 struct iwl_mvm_sta *mvm_sta;
2956 u8 sta_id;
2957 int ret;
2958 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2959
2960 lockdep_assert_held(&mvm->mutex);
2961
2962 /* Get the station id from the mvm local station table */
2963 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2964 if (!mvm_sta) {
2965 IWL_ERR(mvm, "Failed to find station\n");
2966 return -EINVAL;
2967 }
2968 sta_id = mvm_sta->sta_id;
2969
2970 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
2971 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
2972 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
2973 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2974 goto end;
2975 }
2976
2977 /*
2978 * It is possible that the 'sta' parameter is NULL, and thus
2979 * there is a need to retrieve the sta from the local station table.
2980 */
2981 if (!sta) {
2982 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2983 lockdep_is_held(&mvm->mutex));
2984 if (IS_ERR_OR_NULL(sta)) {
2985 IWL_ERR(mvm, "Invalid station id\n");
2986 return -EINVAL;
2987 }
2988 }
2989
2990 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2991 return -EINVAL;
2992
2993 /* If the key_offset is not pre-assigned, we need to find a
2994 * new offset to use. In normal cases, the offset is not
2995 * pre-assigned, but during HW_RESTART we want to reuse the
2996 * same indices, so we pass them when this function is called.
2997 *
2998 * In D3 entry, we need to hardcoded the indices (because the
2999 * firmware hardcodes the PTK offset to 0). In this case, we
3000 * need to make sure we don't overwrite the hw_key_idx in the
3001 * keyconf structure, because otherwise we cannot configure
3002 * the original ones back when resuming.
3003 */
3004 if (key_offset == STA_KEY_IDX_INVALID) {
3005 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3006 if (key_offset == STA_KEY_IDX_INVALID)
3007 return -ENOSPC;
3008 keyconf->hw_key_idx = key_offset;
3009 }
3010
3011 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3012 if (ret)
3013 goto end;
3014
3015 /*
3016 * For WEP, the same key is used for multicast and unicast. Upload it
3017 * again, using the same key offset, and now pointing the other one
3018 * to the same key slot (offset).
3019 * If this fails, remove the original as well.
3020 */
3021 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3022 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
3023 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3024 key_offset, !mcast);
3025 if (ret) {
3026 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3027 goto end;
3028 }
3029 }
3030
3031 __set_bit(key_offset, mvm->fw_key_table);
3032
3033 end:
3034 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3035 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3036 sta ? sta->addr : zero_addr, ret);
3037 return ret;
3038 }
3039
3040 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3041 struct ieee80211_vif *vif,
3042 struct ieee80211_sta *sta,
3043 struct ieee80211_key_conf *keyconf)
3044 {
3045 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3046 struct iwl_mvm_sta *mvm_sta;
3047 u8 sta_id = IWL_MVM_STATION_COUNT;
3048 int ret, i;
3049
3050 lockdep_assert_held(&mvm->mutex);
3051
3052 /* Get the station from the mvm local station table */
3053 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3054 if (!mvm_sta) {
3055 IWL_ERR(mvm, "Failed to find station\n");
3056 return -EINVAL;
3057 }
3058 sta_id = mvm_sta->sta_id;
3059
3060 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3061 keyconf->keyidx, sta_id);
3062
3063 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3064 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3065 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3066 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3067
3068 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3069 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3070 keyconf->hw_key_idx);
3071 return -ENOENT;
3072 }
3073
3074 /* track which key was deleted last */
3075 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3076 if (mvm->fw_key_deleted[i] < U8_MAX)
3077 mvm->fw_key_deleted[i]++;
3078 }
3079 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3080
3081 if (!mvm_sta) {
3082 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3083 return 0;
3084 }
3085
3086 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3087 if (ret)
3088 return ret;
3089
3090 /* delete WEP key twice to get rid of (now useless) offset */
3091 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3092 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3093 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3094
3095 return ret;
3096 }
3097
3098 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3099 struct ieee80211_vif *vif,
3100 struct ieee80211_key_conf *keyconf,
3101 struct ieee80211_sta *sta, u32 iv32,
3102 u16 *phase1key)
3103 {
3104 struct iwl_mvm_sta *mvm_sta;
3105 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3106
3107 rcu_read_lock();
3108
3109 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3110 if (WARN_ON_ONCE(!mvm_sta))
3111 goto unlock;
3112 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3113 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3114
3115 unlock:
3116 rcu_read_unlock();
3117 }
3118
3119 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3120 struct ieee80211_sta *sta)
3121 {
3122 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3123 struct iwl_mvm_add_sta_cmd cmd = {
3124 .add_modify = STA_MODE_MODIFY,
3125 .sta_id = mvmsta->sta_id,
3126 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3127 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3128 };
3129 int ret;
3130
3131 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3132 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3133 if (ret)
3134 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3135 }
3136
3137 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3138 struct ieee80211_sta *sta,
3139 enum ieee80211_frame_release_type reason,
3140 u16 cnt, u16 tids, bool more_data,
3141 bool single_sta_queue)
3142 {
3143 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3144 struct iwl_mvm_add_sta_cmd cmd = {
3145 .add_modify = STA_MODE_MODIFY,
3146 .sta_id = mvmsta->sta_id,
3147 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3148 .sleep_tx_count = cpu_to_le16(cnt),
3149 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3150 };
3151 int tid, ret;
3152 unsigned long _tids = tids;
3153
3154 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3155 * Note that this field is reserved and unused by firmware not
3156 * supporting GO uAPSD, so it's safe to always do this.
3157 */
3158 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3159 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3160
3161 /* If we're releasing frames from aggregation or dqa queues then check
3162 * if all the queues that we're releasing frames from, combined, have:
3163 * - more frames than the service period, in which case more_data
3164 * needs to be set
3165 * - fewer than 'cnt' frames, in which case we need to adjust the
3166 * firmware command (but do that unconditionally)
3167 */
3168 if (single_sta_queue) {
3169 int remaining = cnt;
3170 int sleep_tx_count;
3171
3172 spin_lock_bh(&mvmsta->lock);
3173 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3174 struct iwl_mvm_tid_data *tid_data;
3175 u16 n_queued;
3176
3177 tid_data = &mvmsta->tid_data[tid];
3178 if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3179 tid_data->state != IWL_AGG_ON &&
3180 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3181 "TID %d state is %d\n",
3182 tid, tid_data->state)) {
3183 spin_unlock_bh(&mvmsta->lock);
3184 ieee80211_sta_eosp(sta);
3185 return;
3186 }
3187
3188 n_queued = iwl_mvm_tid_queued(tid_data);
3189 if (n_queued > remaining) {
3190 more_data = true;
3191 remaining = 0;
3192 break;
3193 }
3194 remaining -= n_queued;
3195 }
3196 sleep_tx_count = cnt - remaining;
3197 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3198 mvmsta->sleep_tx_count = sleep_tx_count;
3199 spin_unlock_bh(&mvmsta->lock);
3200
3201 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3202 if (WARN_ON(cnt - remaining == 0)) {
3203 ieee80211_sta_eosp(sta);
3204 return;
3205 }
3206 }
3207
3208 /* Note: this is ignored by firmware not supporting GO uAPSD */
3209 if (more_data)
3210 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
3211
3212 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3213 mvmsta->next_status_eosp = true;
3214 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
3215 } else {
3216 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
3217 }
3218
3219 /* block the Tx queues until the FW updated the sleep Tx count */
3220 iwl_trans_block_txq_ptrs(mvm->trans, true);
3221
3222 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3223 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3224 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3225 if (ret)
3226 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3227 }
3228
3229 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3230 struct iwl_rx_cmd_buffer *rxb)
3231 {
3232 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3233 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3234 struct ieee80211_sta *sta;
3235 u32 sta_id = le32_to_cpu(notif->sta_id);
3236
3237 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3238 return;
3239
3240 rcu_read_lock();
3241 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3242 if (!IS_ERR_OR_NULL(sta))
3243 ieee80211_sta_eosp(sta);
3244 rcu_read_unlock();
3245 }
3246
3247 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3248 struct iwl_mvm_sta *mvmsta, bool disable)
3249 {
3250 struct iwl_mvm_add_sta_cmd cmd = {
3251 .add_modify = STA_MODE_MODIFY,
3252 .sta_id = mvmsta->sta_id,
3253 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3254 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3255 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3256 };
3257 int ret;
3258
3259 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3260 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3261 if (ret)
3262 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3263 }
3264
3265 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3266 struct ieee80211_sta *sta,
3267 bool disable)
3268 {
3269 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3270
3271 spin_lock_bh(&mvm_sta->lock);
3272
3273 if (mvm_sta->disable_tx == disable) {
3274 spin_unlock_bh(&mvm_sta->lock);
3275 return;
3276 }
3277
3278 mvm_sta->disable_tx = disable;
3279
3280 /*
3281 * Tell mac80211 to start/stop queuing tx for this station,
3282 * but don't stop queuing if there are still pending frames
3283 * for this station.
3284 */
3285 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3286 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3287
3288 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3289
3290 spin_unlock_bh(&mvm_sta->lock);
3291 }
3292
3293 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3294 struct iwl_mvm_vif *mvmvif,
3295 bool disable)
3296 {
3297 struct ieee80211_sta *sta;
3298 struct iwl_mvm_sta *mvm_sta;
3299 int i;
3300
3301 lockdep_assert_held(&mvm->mutex);
3302
3303 /* Block/unblock all the stations of the given mvmvif */
3304 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3305 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3306 lockdep_is_held(&mvm->mutex));
3307 if (IS_ERR_OR_NULL(sta))
3308 continue;
3309
3310 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3311 if (mvm_sta->mac_id_n_color !=
3312 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3313 continue;
3314
3315 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3316 }
3317 }
3318
3319 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3320 {
3321 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3322 struct iwl_mvm_sta *mvmsta;
3323
3324 rcu_read_lock();
3325
3326 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3327
3328 if (!WARN_ON(!mvmsta))
3329 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3330
3331 rcu_read_unlock();
3332 }
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