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[mirror_ubuntu-jammy-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 - 2017 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 - 2017 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 if (iwl_mvm_has_new_rx_api(mvm) ||
81 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
82 return sizeof(struct iwl_mvm_add_sta_cmd);
83 else
84 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
85 }
86
87 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
88 enum nl80211_iftype iftype)
89 {
90 int sta_id;
91 u32 reserved_ids = 0;
92
93 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
94 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
95
96 lockdep_assert_held(&mvm->mutex);
97
98 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
99 if (iftype != NL80211_IFTYPE_STATION)
100 reserved_ids = BIT(0);
101
102 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
103 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
104 if (BIT(sta_id) & reserved_ids)
105 continue;
106
107 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
108 lockdep_is_held(&mvm->mutex)))
109 return sta_id;
110 }
111 return IWL_MVM_INVALID_STA;
112 }
113
114 /* send station add/update command to firmware */
115 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
116 bool update, unsigned int flags)
117 {
118 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
119 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
120 .sta_id = mvm_sta->sta_id,
121 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
122 .add_modify = update ? 1 : 0,
123 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
124 STA_FLG_MIMO_EN_MSK),
125 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
126 };
127 int ret;
128 u32 status;
129 u32 agg_size = 0, mpdu_dens = 0;
130
131 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
132 add_sta_cmd.station_type = mvm_sta->sta_type;
133
134 if (!update || (flags & STA_MODIFY_QUEUES)) {
135 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
136
137 if (!iwl_mvm_has_new_tx_api(mvm)) {
138 add_sta_cmd.tfd_queue_msk =
139 cpu_to_le32(mvm_sta->tfd_queue_msk);
140
141 if (flags & STA_MODIFY_QUEUES)
142 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
143 } else {
144 WARN_ON(flags & STA_MODIFY_QUEUES);
145 }
146 }
147
148 switch (sta->bandwidth) {
149 case IEEE80211_STA_RX_BW_160:
150 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
151 /* fall through */
152 case IEEE80211_STA_RX_BW_80:
153 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
154 /* fall through */
155 case IEEE80211_STA_RX_BW_40:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
157 /* fall through */
158 case IEEE80211_STA_RX_BW_20:
159 if (sta->ht_cap.ht_supported)
160 add_sta_cmd.station_flags |=
161 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
162 break;
163 }
164
165 switch (sta->rx_nss) {
166 case 1:
167 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
168 break;
169 case 2:
170 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
171 break;
172 case 3 ... 8:
173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
174 break;
175 }
176
177 switch (sta->smps_mode) {
178 case IEEE80211_SMPS_AUTOMATIC:
179 case IEEE80211_SMPS_NUM_MODES:
180 WARN_ON(1);
181 break;
182 case IEEE80211_SMPS_STATIC:
183 /* override NSS */
184 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
186 break;
187 case IEEE80211_SMPS_DYNAMIC:
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
189 break;
190 case IEEE80211_SMPS_OFF:
191 /* nothing */
192 break;
193 }
194
195 if (sta->ht_cap.ht_supported) {
196 add_sta_cmd.station_flags_msk |=
197 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
198 STA_FLG_AGG_MPDU_DENS_MSK);
199
200 mpdu_dens = sta->ht_cap.ampdu_density;
201 }
202
203 if (sta->vht_cap.vht_supported) {
204 agg_size = sta->vht_cap.cap &
205 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
206 agg_size >>=
207 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
208 } else if (sta->ht_cap.ht_supported) {
209 agg_size = sta->ht_cap.ampdu_factor;
210 }
211
212 add_sta_cmd.station_flags |=
213 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
214 add_sta_cmd.station_flags |=
215 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
216 if (mvm_sta->associated)
217 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
218
219 if (sta->wme) {
220 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
221
222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
223 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
225 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
226 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
227 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
229 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
230 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
231 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
232 }
233
234 status = ADD_STA_SUCCESS;
235 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
236 iwl_mvm_add_sta_cmd_size(mvm),
237 &add_sta_cmd, &status);
238 if (ret)
239 return ret;
240
241 switch (status & IWL_ADD_STA_STATUS_MASK) {
242 case ADD_STA_SUCCESS:
243 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
244 break;
245 default:
246 ret = -EIO;
247 IWL_ERR(mvm, "ADD_STA failed\n");
248 break;
249 }
250
251 return ret;
252 }
253
254 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
255 {
256 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
257 struct iwl_mvm_baid_data *ba_data;
258 struct ieee80211_sta *sta;
259 struct iwl_mvm_sta *mvm_sta;
260 unsigned long timeout;
261
262 rcu_read_lock();
263
264 ba_data = rcu_dereference(*rcu_ptr);
265
266 if (WARN_ON(!ba_data))
267 goto unlock;
268
269 if (!ba_data->timeout)
270 goto unlock;
271
272 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
273 if (time_is_after_jiffies(timeout)) {
274 mod_timer(&ba_data->session_timer, timeout);
275 goto unlock;
276 }
277
278 /* Timer expired */
279 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
280 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
281 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
282 sta->addr, ba_data->tid);
283 unlock:
284 rcu_read_unlock();
285 }
286
287 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
288 struct ieee80211_sta *sta)
289 {
290 unsigned long used_hw_queues;
291 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
292 unsigned int wdg_timeout =
293 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
294 u32 ac;
295
296 lockdep_assert_held(&mvm->mutex);
297
298 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
299
300 /* Find available queues, and allocate them to the ACs */
301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
302 u8 queue = find_first_zero_bit(&used_hw_queues,
303 mvm->first_agg_queue);
304
305 if (queue >= mvm->first_agg_queue) {
306 IWL_ERR(mvm, "Failed to allocate STA queue\n");
307 return -EBUSY;
308 }
309
310 __set_bit(queue, &used_hw_queues);
311 mvmsta->hw_queue[ac] = queue;
312 }
313
314 /* Found a place for all queues - enable them */
315 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
316 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
317 mvmsta->hw_queue[ac],
318 iwl_mvm_ac_to_tx_fifo[ac], 0,
319 wdg_timeout);
320 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
321 }
322
323 return 0;
324 }
325
326 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
327 struct ieee80211_sta *sta)
328 {
329 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
330 unsigned long sta_msk;
331 int i;
332
333 lockdep_assert_held(&mvm->mutex);
334
335 /* disable the TDLS STA-specific queues */
336 sta_msk = mvmsta->tfd_queue_msk;
337 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
338 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
339 }
340
341 /* Disable aggregations for a bitmap of TIDs for a given station */
342 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
343 unsigned long disable_agg_tids,
344 bool remove_queue)
345 {
346 struct iwl_mvm_add_sta_cmd cmd = {};
347 struct ieee80211_sta *sta;
348 struct iwl_mvm_sta *mvmsta;
349 u32 status;
350 u8 sta_id;
351 int ret;
352
353 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
354 return -EINVAL;
355
356 spin_lock_bh(&mvm->queue_info_lock);
357 sta_id = mvm->queue_info[queue].ra_sta_id;
358 spin_unlock_bh(&mvm->queue_info_lock);
359
360 rcu_read_lock();
361
362 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
363
364 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
365 rcu_read_unlock();
366 return -EINVAL;
367 }
368
369 mvmsta = iwl_mvm_sta_from_mac80211(sta);
370
371 mvmsta->tid_disable_agg |= disable_agg_tids;
372
373 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
374 cmd.sta_id = mvmsta->sta_id;
375 cmd.add_modify = STA_MODE_MODIFY;
376 cmd.modify_mask = STA_MODIFY_QUEUES;
377 if (disable_agg_tids)
378 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
379 if (remove_queue)
380 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
381 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
382 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
383
384 rcu_read_unlock();
385
386 /* Notify FW of queue removal from the STA queues */
387 status = ADD_STA_SUCCESS;
388 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
389 iwl_mvm_add_sta_cmd_size(mvm),
390 &cmd, &status);
391
392 return ret;
393 }
394
395 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
396 {
397 struct ieee80211_sta *sta;
398 struct iwl_mvm_sta *mvmsta;
399 unsigned long tid_bitmap;
400 unsigned long agg_tids = 0;
401 s8 sta_id;
402 int tid;
403
404 lockdep_assert_held(&mvm->mutex);
405
406 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
407 return -EINVAL;
408
409 spin_lock_bh(&mvm->queue_info_lock);
410 sta_id = mvm->queue_info[queue].ra_sta_id;
411 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
412 spin_unlock_bh(&mvm->queue_info_lock);
413
414 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
415 lockdep_is_held(&mvm->mutex));
416
417 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
418 return -EINVAL;
419
420 mvmsta = iwl_mvm_sta_from_mac80211(sta);
421
422 spin_lock_bh(&mvmsta->lock);
423 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
424 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
425 agg_tids |= BIT(tid);
426 }
427 spin_unlock_bh(&mvmsta->lock);
428
429 return agg_tids;
430 }
431
432 /*
433 * Remove a queue from a station's resources.
434 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
435 * doesn't disable the queue
436 */
437 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
438 {
439 struct ieee80211_sta *sta;
440 struct iwl_mvm_sta *mvmsta;
441 unsigned long tid_bitmap;
442 unsigned long disable_agg_tids = 0;
443 u8 sta_id;
444 int tid;
445
446 lockdep_assert_held(&mvm->mutex);
447
448 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
449 return -EINVAL;
450
451 spin_lock_bh(&mvm->queue_info_lock);
452 sta_id = mvm->queue_info[queue].ra_sta_id;
453 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
454 spin_unlock_bh(&mvm->queue_info_lock);
455
456 rcu_read_lock();
457
458 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
459
460 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
461 rcu_read_unlock();
462 return 0;
463 }
464
465 mvmsta = iwl_mvm_sta_from_mac80211(sta);
466
467 spin_lock_bh(&mvmsta->lock);
468 /* Unmap MAC queues and TIDs from this queue */
469 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
470 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
471 disable_agg_tids |= BIT(tid);
472 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
473 }
474
475 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
476 spin_unlock_bh(&mvmsta->lock);
477
478 rcu_read_unlock();
479
480 return disable_agg_tids;
481 }
482
483 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
484 bool same_sta)
485 {
486 struct iwl_mvm_sta *mvmsta;
487 u8 txq_curr_ac, sta_id, tid;
488 unsigned long disable_agg_tids = 0;
489 int ret;
490
491 lockdep_assert_held(&mvm->mutex);
492
493 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
494 return -EINVAL;
495
496 spin_lock_bh(&mvm->queue_info_lock);
497 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
498 sta_id = mvm->queue_info[queue].ra_sta_id;
499 tid = mvm->queue_info[queue].txq_tid;
500 spin_unlock_bh(&mvm->queue_info_lock);
501
502 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
503 if (WARN_ON(!mvmsta))
504 return -EINVAL;
505
506 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
507 /* Disable the queue */
508 if (disable_agg_tids)
509 iwl_mvm_invalidate_sta_queue(mvm, queue,
510 disable_agg_tids, false);
511
512 ret = iwl_mvm_disable_txq(mvm, queue,
513 mvmsta->vif->hw_queue[txq_curr_ac],
514 tid, 0);
515 if (ret) {
516 /* Re-mark the inactive queue as inactive */
517 spin_lock_bh(&mvm->queue_info_lock);
518 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
519 spin_unlock_bh(&mvm->queue_info_lock);
520 IWL_ERR(mvm,
521 "Failed to free inactive queue %d (ret=%d)\n",
522 queue, ret);
523
524 return ret;
525 }
526
527 /* If TXQ is allocated to another STA, update removal in FW */
528 if (!same_sta)
529 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
530
531 return 0;
532 }
533
534 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
535 unsigned long tfd_queue_mask, u8 ac)
536 {
537 int queue = 0;
538 u8 ac_to_queue[IEEE80211_NUM_ACS];
539 int i;
540
541 lockdep_assert_held(&mvm->queue_info_lock);
542 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
543 return -EINVAL;
544
545 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
546
547 /* See what ACs the existing queues for this STA have */
548 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
549 /* Only DATA queues can be shared */
550 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
551 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
552 continue;
553
554 /* Don't try and take queues being reconfigured */
555 if (mvm->queue_info[queue].status ==
556 IWL_MVM_QUEUE_RECONFIGURING)
557 continue;
558
559 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
560 }
561
562 /*
563 * The queue to share is chosen only from DATA queues as follows (in
564 * descending priority):
565 * 1. An AC_BE queue
566 * 2. Same AC queue
567 * 3. Highest AC queue that is lower than new AC
568 * 4. Any existing AC (there always is at least 1 DATA queue)
569 */
570
571 /* Priority 1: An AC_BE queue */
572 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
573 queue = ac_to_queue[IEEE80211_AC_BE];
574 /* Priority 2: Same AC queue */
575 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
576 queue = ac_to_queue[ac];
577 /* Priority 3a: If new AC is VO and VI exists - use VI */
578 else if (ac == IEEE80211_AC_VO &&
579 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
580 queue = ac_to_queue[IEEE80211_AC_VI];
581 /* Priority 3b: No BE so only AC less than the new one is BK */
582 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
583 queue = ac_to_queue[IEEE80211_AC_BK];
584 /* Priority 4a: No BE nor BK - use VI if exists */
585 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
586 queue = ac_to_queue[IEEE80211_AC_VI];
587 /* Priority 4b: No BE, BK nor VI - use VO if exists */
588 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
589 queue = ac_to_queue[IEEE80211_AC_VO];
590
591 /* Make sure queue found (or not) is legal */
592 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
593 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
594 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
595 IWL_ERR(mvm, "No DATA queues available to share\n");
596 return -ENOSPC;
597 }
598
599 /* Make sure the queue isn't in the middle of being reconfigured */
600 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
601 IWL_ERR(mvm,
602 "TXQ %d is in the middle of re-config - try again\n",
603 queue);
604 return -EBUSY;
605 }
606
607 return queue;
608 }
609
610 /*
611 * If a given queue has a higher AC than the TID stream that is being compared
612 * to, the queue needs to be redirected to the lower AC. This function does that
613 * in such a case, otherwise - if no redirection required - it does nothing,
614 * unless the %force param is true.
615 */
616 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
617 int ac, int ssn, unsigned int wdg_timeout,
618 bool force)
619 {
620 struct iwl_scd_txq_cfg_cmd cmd = {
621 .scd_queue = queue,
622 .action = SCD_CFG_DISABLE_QUEUE,
623 };
624 bool shared_queue;
625 unsigned long mq;
626 int ret;
627
628 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
629 return -EINVAL;
630
631 /*
632 * If the AC is lower than current one - FIFO needs to be redirected to
633 * the lowest one of the streams in the queue. Check if this is needed
634 * here.
635 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
636 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
637 * we need to check if the numerical value of X is LARGER than of Y.
638 */
639 spin_lock_bh(&mvm->queue_info_lock);
640 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
641 spin_unlock_bh(&mvm->queue_info_lock);
642
643 IWL_DEBUG_TX_QUEUES(mvm,
644 "No redirection needed on TXQ #%d\n",
645 queue);
646 return 0;
647 }
648
649 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
650 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
651 cmd.tid = mvm->queue_info[queue].txq_tid;
652 mq = mvm->hw_queue_to_mac80211[queue];
653 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
654 spin_unlock_bh(&mvm->queue_info_lock);
655
656 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
657 queue, iwl_mvm_ac_to_tx_fifo[ac]);
658
659 /* Stop MAC queues and wait for this queue to empty */
660 iwl_mvm_stop_mac_queues(mvm, mq);
661 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
662 if (ret) {
663 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
664 queue);
665 ret = -EIO;
666 goto out;
667 }
668
669 /* Before redirecting the queue we need to de-activate it */
670 iwl_trans_txq_disable(mvm->trans, queue, false);
671 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
672 if (ret)
673 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
674 ret);
675
676 /* Make sure the SCD wrptr is correctly set before reconfiguring */
677 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
678
679 /* Update the TID "owner" of the queue */
680 spin_lock_bh(&mvm->queue_info_lock);
681 mvm->queue_info[queue].txq_tid = tid;
682 spin_unlock_bh(&mvm->queue_info_lock);
683
684 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
685
686 /* Redirect to lower AC */
687 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
688 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
689 ssn);
690
691 /* Update AC marking of the queue */
692 spin_lock_bh(&mvm->queue_info_lock);
693 mvm->queue_info[queue].mac80211_ac = ac;
694 spin_unlock_bh(&mvm->queue_info_lock);
695
696 /*
697 * Mark queue as shared in transport if shared
698 * Note this has to be done after queue enablement because enablement
699 * can also set this value, and there is no indication there to shared
700 * queues
701 */
702 if (shared_queue)
703 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
704
705 out:
706 /* Continue using the MAC queues */
707 iwl_mvm_start_mac_queues(mvm, mq);
708
709 return ret;
710 }
711
712 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
713 struct ieee80211_sta *sta, u8 ac,
714 int tid)
715 {
716 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
717 unsigned int wdg_timeout =
718 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
719 u8 mac_queue = mvmsta->vif->hw_queue[ac];
720 int queue = -1;
721
722 lockdep_assert_held(&mvm->mutex);
723
724 IWL_DEBUG_TX_QUEUES(mvm,
725 "Allocating queue for sta %d on tid %d\n",
726 mvmsta->sta_id, tid);
727 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
728 wdg_timeout);
729 if (queue < 0)
730 return queue;
731
732 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
733
734 spin_lock_bh(&mvmsta->lock);
735 mvmsta->tid_data[tid].txq_id = queue;
736 mvmsta->tid_data[tid].is_tid_active = true;
737 mvmsta->tfd_queue_msk |= BIT(queue);
738 spin_unlock_bh(&mvmsta->lock);
739
740 return 0;
741 }
742
743 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
744 struct ieee80211_sta *sta, u8 ac, int tid,
745 struct ieee80211_hdr *hdr)
746 {
747 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
748 struct iwl_trans_txq_scd_cfg cfg = {
749 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
750 .sta_id = mvmsta->sta_id,
751 .tid = tid,
752 .frame_limit = IWL_FRAME_LIMIT,
753 };
754 unsigned int wdg_timeout =
755 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
756 u8 mac_queue = mvmsta->vif->hw_queue[ac];
757 int queue = -1;
758 bool using_inactive_queue = false, same_sta = false;
759 unsigned long disable_agg_tids = 0;
760 enum iwl_mvm_agg_state queue_state;
761 bool shared_queue = false;
762 int ssn;
763 unsigned long tfd_queue_mask;
764 int ret;
765
766 lockdep_assert_held(&mvm->mutex);
767
768 if (iwl_mvm_has_new_tx_api(mvm))
769 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
770
771 spin_lock_bh(&mvmsta->lock);
772 tfd_queue_mask = mvmsta->tfd_queue_msk;
773 spin_unlock_bh(&mvmsta->lock);
774
775 spin_lock_bh(&mvm->queue_info_lock);
776
777 /*
778 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
779 * exists
780 */
781 if (!ieee80211_is_data_qos(hdr->frame_control) ||
782 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
783 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
784 IWL_MVM_DQA_MIN_MGMT_QUEUE,
785 IWL_MVM_DQA_MAX_MGMT_QUEUE);
786 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
787 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
788 queue);
789
790 /* If no such queue is found, we'll use a DATA queue instead */
791 }
792
793 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
794 (mvm->queue_info[mvmsta->reserved_queue].status ==
795 IWL_MVM_QUEUE_RESERVED ||
796 mvm->queue_info[mvmsta->reserved_queue].status ==
797 IWL_MVM_QUEUE_INACTIVE)) {
798 queue = mvmsta->reserved_queue;
799 mvm->queue_info[queue].reserved = true;
800 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
801 }
802
803 if (queue < 0)
804 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
805 IWL_MVM_DQA_MIN_DATA_QUEUE,
806 IWL_MVM_DQA_MAX_DATA_QUEUE);
807
808 /*
809 * Check if this queue is already allocated but inactive.
810 * In such a case, we'll need to first free this queue before enabling
811 * it again, so we'll mark it as reserved to make sure no new traffic
812 * arrives on it
813 */
814 if (queue > 0 &&
815 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
816 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
817 using_inactive_queue = true;
818 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
819 IWL_DEBUG_TX_QUEUES(mvm,
820 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
821 queue, mvmsta->sta_id, tid);
822 }
823
824 /* No free queue - we'll have to share */
825 if (queue <= 0) {
826 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
827 if (queue > 0) {
828 shared_queue = true;
829 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
830 }
831 }
832
833 /*
834 * Mark TXQ as ready, even though it hasn't been fully configured yet,
835 * to make sure no one else takes it.
836 * This will allow avoiding re-acquiring the lock at the end of the
837 * configuration. On error we'll mark it back as free.
838 */
839 if ((queue > 0) && !shared_queue)
840 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
841
842 spin_unlock_bh(&mvm->queue_info_lock);
843
844 /* This shouldn't happen - out of queues */
845 if (WARN_ON(queue <= 0)) {
846 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
847 tid, cfg.sta_id);
848 return queue;
849 }
850
851 /*
852 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
853 * but for configuring the SCD to send A-MPDUs we need to mark the queue
854 * as aggregatable.
855 * Mark all DATA queues as allowing to be aggregated at some point
856 */
857 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
858 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
859
860 /*
861 * If this queue was previously inactive (idle) - we need to free it
862 * first
863 */
864 if (using_inactive_queue) {
865 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
866 if (ret)
867 return ret;
868 }
869
870 IWL_DEBUG_TX_QUEUES(mvm,
871 "Allocating %squeue #%d to sta %d on tid %d\n",
872 shared_queue ? "shared " : "", queue,
873 mvmsta->sta_id, tid);
874
875 if (shared_queue) {
876 /* Disable any open aggs on this queue */
877 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
878
879 if (disable_agg_tids) {
880 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
881 queue);
882 iwl_mvm_invalidate_sta_queue(mvm, queue,
883 disable_agg_tids, false);
884 }
885 }
886
887 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
888 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
889 wdg_timeout);
890
891 /*
892 * Mark queue as shared in transport if shared
893 * Note this has to be done after queue enablement because enablement
894 * can also set this value, and there is no indication there to shared
895 * queues
896 */
897 if (shared_queue)
898 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
899
900 spin_lock_bh(&mvmsta->lock);
901 mvmsta->tid_data[tid].txq_id = queue;
902 mvmsta->tid_data[tid].is_tid_active = true;
903 mvmsta->tfd_queue_msk |= BIT(queue);
904 queue_state = mvmsta->tid_data[tid].state;
905
906 if (mvmsta->reserved_queue == queue)
907 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
908 spin_unlock_bh(&mvmsta->lock);
909
910 if (!shared_queue) {
911 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
912 if (ret)
913 goto out_err;
914
915 /* If we need to re-enable aggregations... */
916 if (queue_state == IWL_AGG_ON) {
917 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
918 if (ret)
919 goto out_err;
920 }
921 } else {
922 /* Redirect queue, if needed */
923 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
924 wdg_timeout, false);
925 if (ret)
926 goto out_err;
927 }
928
929 return 0;
930
931 out_err:
932 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
933
934 return ret;
935 }
936
937 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
938 {
939 struct iwl_scd_txq_cfg_cmd cmd = {
940 .scd_queue = queue,
941 .action = SCD_CFG_UPDATE_QUEUE_TID,
942 };
943 int tid;
944 unsigned long tid_bitmap;
945 int ret;
946
947 lockdep_assert_held(&mvm->mutex);
948
949 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
950 return;
951
952 spin_lock_bh(&mvm->queue_info_lock);
953 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
954 spin_unlock_bh(&mvm->queue_info_lock);
955
956 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
957 return;
958
959 /* Find any TID for queue */
960 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
961 cmd.tid = tid;
962 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
963
964 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
965 if (ret) {
966 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
967 queue, ret);
968 return;
969 }
970
971 spin_lock_bh(&mvm->queue_info_lock);
972 mvm->queue_info[queue].txq_tid = tid;
973 spin_unlock_bh(&mvm->queue_info_lock);
974 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
975 queue, tid);
976 }
977
978 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
979 {
980 struct ieee80211_sta *sta;
981 struct iwl_mvm_sta *mvmsta;
982 s8 sta_id;
983 int tid = -1;
984 unsigned long tid_bitmap;
985 unsigned int wdg_timeout;
986 int ssn;
987 int ret = true;
988
989 /* queue sharing is disabled on new TX path */
990 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
991 return;
992
993 lockdep_assert_held(&mvm->mutex);
994
995 spin_lock_bh(&mvm->queue_info_lock);
996 sta_id = mvm->queue_info[queue].ra_sta_id;
997 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
998 spin_unlock_bh(&mvm->queue_info_lock);
999
1000 /* Find TID for queue, and make sure it is the only one on the queue */
1001 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1002 if (tid_bitmap != BIT(tid)) {
1003 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1004 queue, tid_bitmap);
1005 return;
1006 }
1007
1008 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1009 tid);
1010
1011 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1012 lockdep_is_held(&mvm->mutex));
1013
1014 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1015 return;
1016
1017 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1018 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1019
1020 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1021
1022 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1023 tid_to_mac80211_ac[tid], ssn,
1024 wdg_timeout, true);
1025 if (ret) {
1026 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1027 return;
1028 }
1029
1030 /* If aggs should be turned back on - do it */
1031 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1032 struct iwl_mvm_add_sta_cmd cmd = {0};
1033
1034 mvmsta->tid_disable_agg &= ~BIT(tid);
1035
1036 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1037 cmd.sta_id = mvmsta->sta_id;
1038 cmd.add_modify = STA_MODE_MODIFY;
1039 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1040 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1041 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1042
1043 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1044 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1045 if (!ret) {
1046 IWL_DEBUG_TX_QUEUES(mvm,
1047 "TXQ #%d is now aggregated again\n",
1048 queue);
1049
1050 /* Mark queue intenally as aggregating again */
1051 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1052 }
1053 }
1054
1055 spin_lock_bh(&mvm->queue_info_lock);
1056 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1057 spin_unlock_bh(&mvm->queue_info_lock);
1058 }
1059
1060 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1061 {
1062 if (tid == IWL_MAX_TID_COUNT)
1063 return IEEE80211_AC_VO; /* MGMT */
1064
1065 return tid_to_mac80211_ac[tid];
1066 }
1067
1068 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1069 struct ieee80211_sta *sta, int tid)
1070 {
1071 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1072 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1073 struct sk_buff *skb;
1074 struct ieee80211_hdr *hdr;
1075 struct sk_buff_head deferred_tx;
1076 u8 mac_queue;
1077 bool no_queue = false; /* Marks if there is a problem with the queue */
1078 u8 ac;
1079
1080 lockdep_assert_held(&mvm->mutex);
1081
1082 skb = skb_peek(&tid_data->deferred_tx_frames);
1083 if (!skb)
1084 return;
1085 hdr = (void *)skb->data;
1086
1087 ac = iwl_mvm_tid_to_ac_queue(tid);
1088 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1089
1090 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1091 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1092 IWL_ERR(mvm,
1093 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1094 mvmsta->sta_id, tid);
1095
1096 /*
1097 * Mark queue as problematic so later the deferred traffic is
1098 * freed, as we can do nothing with it
1099 */
1100 no_queue = true;
1101 }
1102
1103 __skb_queue_head_init(&deferred_tx);
1104
1105 /* Disable bottom-halves when entering TX path */
1106 local_bh_disable();
1107 spin_lock(&mvmsta->lock);
1108 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1109 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1110 spin_unlock(&mvmsta->lock);
1111
1112 while ((skb = __skb_dequeue(&deferred_tx)))
1113 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1114 ieee80211_free_txskb(mvm->hw, skb);
1115 local_bh_enable();
1116
1117 /* Wake queue */
1118 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1119 }
1120
1121 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1122 {
1123 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1124 add_stream_wk);
1125 struct ieee80211_sta *sta;
1126 struct iwl_mvm_sta *mvmsta;
1127 unsigned long deferred_tid_traffic;
1128 int queue, sta_id, tid;
1129
1130 /* Check inactivity of queues */
1131 iwl_mvm_inactivity_check(mvm);
1132
1133 mutex_lock(&mvm->mutex);
1134
1135 /* No queue reconfiguration in TVQM mode */
1136 if (iwl_mvm_has_new_tx_api(mvm))
1137 goto alloc_queues;
1138
1139 /* Reconfigure queues requiring reconfiguation */
1140 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1141 bool reconfig;
1142 bool change_owner;
1143
1144 spin_lock_bh(&mvm->queue_info_lock);
1145 reconfig = (mvm->queue_info[queue].status ==
1146 IWL_MVM_QUEUE_RECONFIGURING);
1147
1148 /*
1149 * We need to take into account a situation in which a TXQ was
1150 * allocated to TID x, and then turned shared by adding TIDs y
1151 * and z. If TID x becomes inactive and is removed from the TXQ,
1152 * ownership must be given to one of the remaining TIDs.
1153 * This is mainly because if TID x continues - a new queue can't
1154 * be allocated for it as long as it is an owner of another TXQ.
1155 */
1156 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1157 BIT(mvm->queue_info[queue].txq_tid)) &&
1158 (mvm->queue_info[queue].status ==
1159 IWL_MVM_QUEUE_SHARED);
1160 spin_unlock_bh(&mvm->queue_info_lock);
1161
1162 if (reconfig)
1163 iwl_mvm_unshare_queue(mvm, queue);
1164 else if (change_owner)
1165 iwl_mvm_change_queue_owner(mvm, queue);
1166 }
1167
1168 alloc_queues:
1169 /* Go over all stations with deferred traffic */
1170 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1171 IWL_MVM_STATION_COUNT) {
1172 clear_bit(sta_id, mvm->sta_deferred_frames);
1173 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1174 lockdep_is_held(&mvm->mutex));
1175 if (IS_ERR_OR_NULL(sta))
1176 continue;
1177
1178 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1179 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1180
1181 for_each_set_bit(tid, &deferred_tid_traffic,
1182 IWL_MAX_TID_COUNT + 1)
1183 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1184 }
1185
1186 mutex_unlock(&mvm->mutex);
1187 }
1188
1189 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1190 struct ieee80211_sta *sta,
1191 enum nl80211_iftype vif_type)
1192 {
1193 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1194 int queue;
1195 bool using_inactive_queue = false, same_sta = false;
1196
1197 /* queue reserving is disabled on new TX path */
1198 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1199 return 0;
1200
1201 /*
1202 * Check for inactive queues, so we don't reach a situation where we
1203 * can't add a STA due to a shortage in queues that doesn't really exist
1204 */
1205 iwl_mvm_inactivity_check(mvm);
1206
1207 spin_lock_bh(&mvm->queue_info_lock);
1208
1209 /* Make sure we have free resources for this STA */
1210 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1211 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1212 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1213 IWL_MVM_QUEUE_FREE))
1214 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1215 else
1216 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1217 IWL_MVM_DQA_MIN_DATA_QUEUE,
1218 IWL_MVM_DQA_MAX_DATA_QUEUE);
1219 if (queue < 0) {
1220 spin_unlock_bh(&mvm->queue_info_lock);
1221 IWL_ERR(mvm, "No available queues for new station\n");
1222 return -ENOSPC;
1223 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1224 /*
1225 * If this queue is already allocated but inactive we'll need to
1226 * first free this queue before enabling it again, we'll mark
1227 * it as reserved to make sure no new traffic arrives on it
1228 */
1229 using_inactive_queue = true;
1230 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1231 }
1232 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1233
1234 spin_unlock_bh(&mvm->queue_info_lock);
1235
1236 mvmsta->reserved_queue = queue;
1237
1238 if (using_inactive_queue)
1239 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1240
1241 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1242 queue, mvmsta->sta_id);
1243
1244 return 0;
1245 }
1246
1247 /*
1248 * In DQA mode, after a HW restart the queues should be allocated as before, in
1249 * order to avoid race conditions when there are shared queues. This function
1250 * does the re-mapping and queue allocation.
1251 *
1252 * Note that re-enabling aggregations isn't done in this function.
1253 */
1254 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1255 struct iwl_mvm_sta *mvm_sta)
1256 {
1257 unsigned int wdg_timeout =
1258 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1259 int i;
1260 struct iwl_trans_txq_scd_cfg cfg = {
1261 .sta_id = mvm_sta->sta_id,
1262 .frame_limit = IWL_FRAME_LIMIT,
1263 };
1264
1265 /* Make sure reserved queue is still marked as such (if allocated) */
1266 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1267 mvm->queue_info[mvm_sta->reserved_queue].status =
1268 IWL_MVM_QUEUE_RESERVED;
1269
1270 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1271 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1272 int txq_id = tid_data->txq_id;
1273 int ac;
1274 u8 mac_queue;
1275
1276 if (txq_id == IWL_MVM_INVALID_QUEUE)
1277 continue;
1278
1279 skb_queue_head_init(&tid_data->deferred_tx_frames);
1280
1281 ac = tid_to_mac80211_ac[i];
1282 mac_queue = mvm_sta->vif->hw_queue[ac];
1283
1284 if (iwl_mvm_has_new_tx_api(mvm)) {
1285 IWL_DEBUG_TX_QUEUES(mvm,
1286 "Re-mapping sta %d tid %d\n",
1287 mvm_sta->sta_id, i);
1288 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1289 mvm_sta->sta_id,
1290 i, wdg_timeout);
1291 tid_data->txq_id = txq_id;
1292 } else {
1293 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1294
1295 cfg.tid = i;
1296 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1297 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1298 txq_id ==
1299 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1300
1301 IWL_DEBUG_TX_QUEUES(mvm,
1302 "Re-mapping sta %d tid %d to queue %d\n",
1303 mvm_sta->sta_id, i, txq_id);
1304
1305 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1306 wdg_timeout);
1307 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1308 }
1309 }
1310
1311 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1312 }
1313
1314 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1315 struct ieee80211_vif *vif,
1316 struct ieee80211_sta *sta)
1317 {
1318 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1319 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1320 struct iwl_mvm_rxq_dup_data *dup_data;
1321 int i, ret, sta_id;
1322
1323 lockdep_assert_held(&mvm->mutex);
1324
1325 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1326 sta_id = iwl_mvm_find_free_sta_id(mvm,
1327 ieee80211_vif_type_p2p(vif));
1328 else
1329 sta_id = mvm_sta->sta_id;
1330
1331 if (sta_id == IWL_MVM_INVALID_STA)
1332 return -ENOSPC;
1333
1334 spin_lock_init(&mvm_sta->lock);
1335
1336 /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1337 if (iwl_mvm_is_dqa_supported(mvm) &&
1338 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1339 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1340 goto update_fw;
1341 }
1342
1343 mvm_sta->sta_id = sta_id;
1344 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1345 mvmvif->color);
1346 mvm_sta->vif = vif;
1347 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1348 mvm_sta->tx_protection = 0;
1349 mvm_sta->tt_tx_protection = false;
1350 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1351
1352 /* HW restart, don't assume the memory has been zeroed */
1353 atomic_set(&mvm->pending_frames[sta_id], 0);
1354 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1355 mvm_sta->tfd_queue_msk = 0;
1356
1357 /*
1358 * Allocate new queues for a TDLS station, unless we're in DQA mode,
1359 * and then they'll be allocated dynamically
1360 */
1361 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1362 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1363 if (ret)
1364 return ret;
1365 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1366 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1367 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1368 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1369 }
1370
1371 /* for HW restart - reset everything but the sequence number */
1372 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1373 u16 seq = mvm_sta->tid_data[i].seq_number;
1374 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1375 mvm_sta->tid_data[i].seq_number = seq;
1376
1377 if (!iwl_mvm_is_dqa_supported(mvm))
1378 continue;
1379
1380 /*
1381 * Mark all queues for this STA as unallocated and defer TX
1382 * frames until the queue is allocated
1383 */
1384 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1385 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1386 }
1387 mvm_sta->deferred_traffic_tid_map = 0;
1388 mvm_sta->agg_tids = 0;
1389
1390 if (iwl_mvm_has_new_rx_api(mvm) &&
1391 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1392 dup_data = kcalloc(mvm->trans->num_rx_queues,
1393 sizeof(*dup_data),
1394 GFP_KERNEL);
1395 if (!dup_data)
1396 return -ENOMEM;
1397 mvm_sta->dup_data = dup_data;
1398 }
1399
1400 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1401 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1402 ieee80211_vif_type_p2p(vif));
1403 if (ret)
1404 goto err;
1405 }
1406
1407 update_fw:
1408 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1409 if (ret)
1410 goto err;
1411
1412 if (vif->type == NL80211_IFTYPE_STATION) {
1413 if (!sta->tdls) {
1414 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1415 mvmvif->ap_sta_id = sta_id;
1416 } else {
1417 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1418 }
1419 }
1420
1421 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1422
1423 return 0;
1424
1425 err:
1426 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1427 iwl_mvm_tdls_sta_deinit(mvm, sta);
1428 return ret;
1429 }
1430
1431 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1432 bool drain)
1433 {
1434 struct iwl_mvm_add_sta_cmd cmd = {};
1435 int ret;
1436 u32 status;
1437
1438 lockdep_assert_held(&mvm->mutex);
1439
1440 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1441 cmd.sta_id = mvmsta->sta_id;
1442 cmd.add_modify = STA_MODE_MODIFY;
1443 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1444 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1445
1446 status = ADD_STA_SUCCESS;
1447 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1448 iwl_mvm_add_sta_cmd_size(mvm),
1449 &cmd, &status);
1450 if (ret)
1451 return ret;
1452
1453 switch (status & IWL_ADD_STA_STATUS_MASK) {
1454 case ADD_STA_SUCCESS:
1455 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1456 mvmsta->sta_id);
1457 break;
1458 default:
1459 ret = -EIO;
1460 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1461 mvmsta->sta_id);
1462 break;
1463 }
1464
1465 return ret;
1466 }
1467
1468 /*
1469 * Remove a station from the FW table. Before sending the command to remove
1470 * the station validate that the station is indeed known to the driver (sanity
1471 * only).
1472 */
1473 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1474 {
1475 struct ieee80211_sta *sta;
1476 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1477 .sta_id = sta_id,
1478 };
1479 int ret;
1480
1481 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1482 lockdep_is_held(&mvm->mutex));
1483
1484 /* Note: internal stations are marked as error values */
1485 if (!sta) {
1486 IWL_ERR(mvm, "Invalid station id\n");
1487 return -EINVAL;
1488 }
1489
1490 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1491 sizeof(rm_sta_cmd), &rm_sta_cmd);
1492 if (ret) {
1493 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1494 return ret;
1495 }
1496
1497 return 0;
1498 }
1499
1500 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1501 {
1502 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1503 u8 sta_id;
1504
1505 /*
1506 * The mutex is needed because of the SYNC cmd, but not only: if the
1507 * work would run concurrently with iwl_mvm_rm_sta, it would run before
1508 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1509 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1510 * that later.
1511 */
1512 mutex_lock(&mvm->mutex);
1513
1514 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1515 int ret;
1516 struct ieee80211_sta *sta =
1517 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1518 lockdep_is_held(&mvm->mutex));
1519
1520 /*
1521 * This station is in use or RCU-removed; the latter happens in
1522 * managed mode, where mac80211 removes the station before we
1523 * can remove it from firmware (we can only do that after the
1524 * MAC is marked unassociated), and possibly while the deauth
1525 * frame to disconnect from the AP is still queued. Then, the
1526 * station pointer is -ENOENT when the last skb is reclaimed.
1527 */
1528 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1529 continue;
1530
1531 if (PTR_ERR(sta) == -EINVAL) {
1532 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1533 sta_id);
1534 continue;
1535 }
1536
1537 if (!sta) {
1538 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1539 sta_id);
1540 continue;
1541 }
1542
1543 WARN_ON(PTR_ERR(sta) != -EBUSY);
1544 /* This station was removed and we waited until it got drained,
1545 * we can now proceed and remove it.
1546 */
1547 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1548 if (ret) {
1549 IWL_ERR(mvm,
1550 "Couldn't remove sta %d after it was drained\n",
1551 sta_id);
1552 continue;
1553 }
1554 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1555 clear_bit(sta_id, mvm->sta_drained);
1556
1557 if (mvm->tfd_drained[sta_id]) {
1558 unsigned long i, msk = mvm->tfd_drained[sta_id];
1559
1560 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1561 iwl_mvm_disable_txq(mvm, i, i,
1562 IWL_MAX_TID_COUNT, 0);
1563
1564 mvm->tfd_drained[sta_id] = 0;
1565 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1566 sta_id, msk);
1567 }
1568 }
1569
1570 mutex_unlock(&mvm->mutex);
1571 }
1572
1573 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1574 struct ieee80211_vif *vif,
1575 struct iwl_mvm_sta *mvm_sta)
1576 {
1577 int ac;
1578 int i;
1579
1580 lockdep_assert_held(&mvm->mutex);
1581
1582 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1583 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1584 continue;
1585
1586 ac = iwl_mvm_tid_to_ac_queue(i);
1587 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1588 vif->hw_queue[ac], i, 0);
1589 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1590 }
1591 }
1592
1593 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1594 struct ieee80211_vif *vif,
1595 struct ieee80211_sta *sta)
1596 {
1597 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1598 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1599 u8 sta_id = mvm_sta->sta_id;
1600 int ret;
1601
1602 lockdep_assert_held(&mvm->mutex);
1603
1604 if (iwl_mvm_has_new_rx_api(mvm))
1605 kfree(mvm_sta->dup_data);
1606
1607 if ((vif->type == NL80211_IFTYPE_STATION &&
1608 mvmvif->ap_sta_id == sta_id) ||
1609 iwl_mvm_is_dqa_supported(mvm)){
1610 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1611 if (ret)
1612 return ret;
1613 /* flush its queues here since we are freeing mvm_sta */
1614 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1615 if (ret)
1616 return ret;
1617 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1618 mvm_sta->tfd_queue_msk);
1619 if (ret)
1620 return ret;
1621 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1622
1623 /* If DQA is supported - the queues can be disabled now */
1624 if (iwl_mvm_is_dqa_supported(mvm)) {
1625 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1626 /*
1627 * If pending_frames is set at this point - it must be
1628 * driver internal logic error, since queues are empty
1629 * and removed successuly.
1630 * warn on it but set it to 0 anyway to avoid station
1631 * not being removed later in the function
1632 */
1633 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1634 }
1635
1636 /* If there is a TXQ still marked as reserved - free it */
1637 if (iwl_mvm_is_dqa_supported(mvm) &&
1638 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1639 u8 reserved_txq = mvm_sta->reserved_queue;
1640 enum iwl_mvm_queue_status *status;
1641
1642 /*
1643 * If no traffic has gone through the reserved TXQ - it
1644 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1645 * should be manually marked as free again
1646 */
1647 spin_lock_bh(&mvm->queue_info_lock);
1648 status = &mvm->queue_info[reserved_txq].status;
1649 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1650 (*status != IWL_MVM_QUEUE_FREE),
1651 "sta_id %d reserved txq %d status %d",
1652 sta_id, reserved_txq, *status)) {
1653 spin_unlock_bh(&mvm->queue_info_lock);
1654 return -EINVAL;
1655 }
1656
1657 *status = IWL_MVM_QUEUE_FREE;
1658 spin_unlock_bh(&mvm->queue_info_lock);
1659 }
1660
1661 if (vif->type == NL80211_IFTYPE_STATION &&
1662 mvmvif->ap_sta_id == sta_id) {
1663 /* if associated - we can't remove the AP STA now */
1664 if (vif->bss_conf.assoc)
1665 return ret;
1666
1667 /* unassoc - go ahead - remove the AP STA now */
1668 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1669
1670 /* clear d0i3_ap_sta_id if no longer relevant */
1671 if (mvm->d0i3_ap_sta_id == sta_id)
1672 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1673 }
1674 }
1675
1676 /*
1677 * This shouldn't happen - the TDLS channel switch should be canceled
1678 * before the STA is removed.
1679 */
1680 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1681 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1682 cancel_delayed_work(&mvm->tdls_cs.dwork);
1683 }
1684
1685 /*
1686 * Make sure that the tx response code sees the station as -EBUSY and
1687 * calls the drain worker.
1688 */
1689 spin_lock_bh(&mvm_sta->lock);
1690
1691 /*
1692 * There are frames pending on the AC queues for this station.
1693 * We need to wait until all the frames are drained...
1694 */
1695 if (atomic_read(&mvm->pending_frames[sta_id])) {
1696 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1697 ERR_PTR(-EBUSY));
1698 spin_unlock_bh(&mvm_sta->lock);
1699
1700 /* disable TDLS sta queues on drain complete */
1701 if (sta->tdls) {
1702 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1703 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1704 }
1705
1706 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1707 } else {
1708 spin_unlock_bh(&mvm_sta->lock);
1709
1710 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1711 iwl_mvm_tdls_sta_deinit(mvm, sta);
1712
1713 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1714 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1715 }
1716
1717 return ret;
1718 }
1719
1720 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1721 struct ieee80211_vif *vif,
1722 u8 sta_id)
1723 {
1724 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1725
1726 lockdep_assert_held(&mvm->mutex);
1727
1728 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1729 return ret;
1730 }
1731
1732 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1733 struct iwl_mvm_int_sta *sta,
1734 u32 qmask, enum nl80211_iftype iftype,
1735 enum iwl_sta_type type)
1736 {
1737 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1738 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1739 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1740 return -ENOSPC;
1741 }
1742
1743 sta->tfd_queue_msk = qmask;
1744 sta->type = type;
1745
1746 /* put a non-NULL value so iterating over the stations won't stop */
1747 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1748 return 0;
1749 }
1750
1751 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1752 {
1753 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1754 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1755 sta->sta_id = IWL_MVM_INVALID_STA;
1756 }
1757
1758 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1759 struct iwl_mvm_int_sta *sta,
1760 const u8 *addr,
1761 u16 mac_id, u16 color)
1762 {
1763 struct iwl_mvm_add_sta_cmd cmd;
1764 int ret;
1765 u32 status;
1766
1767 lockdep_assert_held(&mvm->mutex);
1768
1769 memset(&cmd, 0, sizeof(cmd));
1770 cmd.sta_id = sta->sta_id;
1771 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1772 color));
1773 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1774 cmd.station_type = sta->type;
1775
1776 if (!iwl_mvm_has_new_tx_api(mvm))
1777 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1778 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1779
1780 if (addr)
1781 memcpy(cmd.addr, addr, ETH_ALEN);
1782
1783 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1784 iwl_mvm_add_sta_cmd_size(mvm),
1785 &cmd, &status);
1786 if (ret)
1787 return ret;
1788
1789 switch (status & IWL_ADD_STA_STATUS_MASK) {
1790 case ADD_STA_SUCCESS:
1791 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1792 return 0;
1793 default:
1794 ret = -EIO;
1795 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1796 status);
1797 break;
1798 }
1799 return ret;
1800 }
1801
1802 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm)
1803 {
1804 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1805 mvm->cfg->base_params->wd_timeout :
1806 IWL_WATCHDOG_DISABLED;
1807
1808 if (iwl_mvm_has_new_tx_api(mvm)) {
1809 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1810 mvm->aux_sta.sta_id,
1811 IWL_MAX_TID_COUNT,
1812 wdg_timeout);
1813 mvm->aux_queue = queue;
1814 } else if (iwl_mvm_is_dqa_supported(mvm)) {
1815 struct iwl_trans_txq_scd_cfg cfg = {
1816 .fifo = IWL_MVM_TX_FIFO_MCAST,
1817 .sta_id = mvm->aux_sta.sta_id,
1818 .tid = IWL_MAX_TID_COUNT,
1819 .aggregate = false,
1820 .frame_limit = IWL_FRAME_LIMIT,
1821 };
1822
1823 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1824 wdg_timeout);
1825 } else {
1826 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1827 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1828 }
1829 }
1830
1831 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1832 {
1833 int ret;
1834
1835 lockdep_assert_held(&mvm->mutex);
1836
1837 /* Allocate aux station and assign to it the aux queue */
1838 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1839 NL80211_IFTYPE_UNSPECIFIED,
1840 IWL_STA_AUX_ACTIVITY);
1841 if (ret)
1842 return ret;
1843
1844 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1845 if (!iwl_mvm_has_new_tx_api(mvm))
1846 iwl_mvm_enable_aux_queue(mvm);
1847
1848 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1849 MAC_INDEX_AUX, 0);
1850 if (ret) {
1851 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1852 return ret;
1853 }
1854
1855 /*
1856 * For a000 firmware and on we cannot add queue to a station unknown
1857 * to firmware so enable queue here - after the station was added
1858 */
1859 if (iwl_mvm_has_new_tx_api(mvm))
1860 iwl_mvm_enable_aux_queue(mvm);
1861
1862 return 0;
1863 }
1864
1865 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1866 {
1867 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1868
1869 lockdep_assert_held(&mvm->mutex);
1870 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1871 mvmvif->id, 0);
1872 }
1873
1874 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1875 {
1876 int ret;
1877
1878 lockdep_assert_held(&mvm->mutex);
1879
1880 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1881 if (ret)
1882 IWL_WARN(mvm, "Failed sending remove station\n");
1883
1884 return ret;
1885 }
1886
1887 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1888 {
1889 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1890 }
1891
1892 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1893 {
1894 lockdep_assert_held(&mvm->mutex);
1895
1896 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1897 }
1898
1899 /*
1900 * Send the add station command for the vif's broadcast station.
1901 * Assumes that the station was already allocated.
1902 *
1903 * @mvm: the mvm component
1904 * @vif: the interface to which the broadcast station is added
1905 * @bsta: the broadcast station to add.
1906 */
1907 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1908 {
1909 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1910 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1911 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1912 const u8 *baddr = _baddr;
1913 int queue;
1914 int ret;
1915 unsigned int wdg_timeout =
1916 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1917 struct iwl_trans_txq_scd_cfg cfg = {
1918 .fifo = IWL_MVM_TX_FIFO_VO,
1919 .sta_id = mvmvif->bcast_sta.sta_id,
1920 .tid = IWL_MAX_TID_COUNT,
1921 .aggregate = false,
1922 .frame_limit = IWL_FRAME_LIMIT,
1923 };
1924
1925 lockdep_assert_held(&mvm->mutex);
1926
1927 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1928 if (vif->type == NL80211_IFTYPE_AP ||
1929 vif->type == NL80211_IFTYPE_ADHOC)
1930 queue = mvm->probe_queue;
1931 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1932 queue = mvm->p2p_dev_queue;
1933 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1934 return -EINVAL;
1935
1936 bsta->tfd_queue_msk |= BIT(queue);
1937
1938 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1939 &cfg, wdg_timeout);
1940 }
1941
1942 if (vif->type == NL80211_IFTYPE_ADHOC)
1943 baddr = vif->bss_conf.bssid;
1944
1945 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1946 return -ENOSPC;
1947
1948 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1949 mvmvif->id, mvmvif->color);
1950 if (ret)
1951 return ret;
1952
1953 /*
1954 * For a000 firmware and on we cannot add queue to a station unknown
1955 * to firmware so enable queue here - after the station was added
1956 */
1957 if (iwl_mvm_has_new_tx_api(mvm)) {
1958 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1959 bsta->sta_id,
1960 IWL_MAX_TID_COUNT,
1961 wdg_timeout);
1962
1963 if (vif->type == NL80211_IFTYPE_AP)
1964 mvm->probe_queue = queue;
1965 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1966 mvm->p2p_dev_queue = queue;
1967
1968 bsta->tfd_queue_msk |= BIT(queue);
1969 }
1970
1971 return 0;
1972 }
1973
1974 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1975 struct ieee80211_vif *vif)
1976 {
1977 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1978
1979 lockdep_assert_held(&mvm->mutex);
1980
1981 if (vif->type == NL80211_IFTYPE_AP ||
1982 vif->type == NL80211_IFTYPE_ADHOC)
1983 iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue,
1984 IWL_MAX_TID_COUNT, 0);
1985
1986 if (mvmvif->bcast_sta.tfd_queue_msk & BIT(mvm->probe_queue)) {
1987 iwl_mvm_disable_txq(mvm, mvm->probe_queue,
1988 vif->hw_queue[0], IWL_MAX_TID_COUNT,
1989 0);
1990 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(mvm->probe_queue);
1991 }
1992
1993 if (mvmvif->bcast_sta.tfd_queue_msk & BIT(mvm->p2p_dev_queue)) {
1994 iwl_mvm_disable_txq(mvm, mvm->p2p_dev_queue,
1995 vif->hw_queue[0], IWL_MAX_TID_COUNT,
1996 0);
1997 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(mvm->p2p_dev_queue);
1998 }
1999 }
2000
2001 /* Send the FW a request to remove the station from it's internal data
2002 * structures, but DO NOT remove the entry from the local data structures. */
2003 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2004 {
2005 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2006 int ret;
2007
2008 lockdep_assert_held(&mvm->mutex);
2009
2010 if (iwl_mvm_is_dqa_supported(mvm))
2011 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2012
2013 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2014 if (ret)
2015 IWL_WARN(mvm, "Failed sending remove station\n");
2016 return ret;
2017 }
2018
2019 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2020 {
2021 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2022 u32 qmask = 0;
2023
2024 lockdep_assert_held(&mvm->mutex);
2025
2026 if (!iwl_mvm_is_dqa_supported(mvm)) {
2027 qmask = iwl_mvm_mac_get_queues_mask(vif);
2028
2029 /*
2030 * The firmware defines the TFD queue mask to only be relevant
2031 * for *unicast* queues, so the multicast (CAB) queue shouldn't
2032 * be included. This only happens in NL80211_IFTYPE_AP vif type,
2033 * so the next line will only have an effect there.
2034 */
2035 qmask &= ~BIT(vif->cab_queue);
2036 }
2037
2038 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
2039 ieee80211_vif_type_p2p(vif),
2040 IWL_STA_GENERAL_PURPOSE);
2041 }
2042
2043 /* Allocate a new station entry for the broadcast station to the given vif,
2044 * and send it to the FW.
2045 * Note that each P2P mac should have its own broadcast station.
2046 *
2047 * @mvm: the mvm component
2048 * @vif: the interface to which the broadcast station is added
2049 * @bsta: the broadcast station to add. */
2050 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2051 {
2052 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2053 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2054 int ret;
2055
2056 lockdep_assert_held(&mvm->mutex);
2057
2058 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2059 if (ret)
2060 return ret;
2061
2062 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2063
2064 if (ret)
2065 iwl_mvm_dealloc_int_sta(mvm, bsta);
2066
2067 return ret;
2068 }
2069
2070 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2071 {
2072 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2073
2074 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2075 }
2076
2077 /*
2078 * Send the FW a request to remove the station from it's internal data
2079 * structures, and in addition remove it from the local data structure.
2080 */
2081 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2082 {
2083 int ret;
2084
2085 lockdep_assert_held(&mvm->mutex);
2086
2087 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2088
2089 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2090
2091 return ret;
2092 }
2093
2094 /*
2095 * Allocate a new station entry for the multicast station to the given vif,
2096 * and send it to the FW.
2097 * Note that each AP/GO mac should have its own multicast station.
2098 *
2099 * @mvm: the mvm component
2100 * @vif: the interface to which the multicast station is added
2101 */
2102 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2103 {
2104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2105 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2106 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2107 const u8 *maddr = _maddr;
2108 struct iwl_trans_txq_scd_cfg cfg = {
2109 .fifo = IWL_MVM_TX_FIFO_MCAST,
2110 .sta_id = msta->sta_id,
2111 .tid = IWL_MAX_TID_COUNT,
2112 .aggregate = false,
2113 .frame_limit = IWL_FRAME_LIMIT,
2114 };
2115 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2116 int ret;
2117
2118 lockdep_assert_held(&mvm->mutex);
2119
2120 if (!iwl_mvm_is_dqa_supported(mvm))
2121 return 0;
2122
2123 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2124 vif->type != NL80211_IFTYPE_ADHOC))
2125 return -ENOTSUPP;
2126
2127 /*
2128 * While in previous FWs we had to exclude cab queue from TFD queue
2129 * mask, now it is needed as any other queue.
2130 */
2131 if (!iwl_mvm_has_new_tx_api(mvm) &&
2132 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2133 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2134 &cfg, timeout);
2135 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2136 }
2137 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2138 mvmvif->id, mvmvif->color);
2139 if (ret) {
2140 iwl_mvm_dealloc_int_sta(mvm, msta);
2141 return ret;
2142 }
2143
2144 /*
2145 * Enable cab queue after the ADD_STA command is sent.
2146 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2147 * command with unknown station id, and for FW that doesn't support
2148 * station API since the cab queue is not included in the
2149 * tfd_queue_mask.
2150 */
2151 if (iwl_mvm_has_new_tx_api(mvm)) {
2152 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2153 msta->sta_id,
2154 IWL_MAX_TID_COUNT,
2155 timeout);
2156 mvmvif->cab_queue = queue;
2157 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2158 IWL_UCODE_TLV_API_STA_TYPE)) {
2159 /*
2160 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2161 * invalid, so make sure we use the queue we want.
2162 * Note that this is done here as we want to avoid making DQA
2163 * changes in mac80211 layer.
2164 */
2165 if (vif->type == NL80211_IFTYPE_ADHOC) {
2166 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2167 mvmvif->cab_queue = vif->cab_queue;
2168 }
2169 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2170 &cfg, timeout);
2171 }
2172
2173 return 0;
2174 }
2175
2176 /*
2177 * Send the FW a request to remove the station from it's internal data
2178 * structures, and in addition remove it from the local data structure.
2179 */
2180 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2181 {
2182 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2183 int ret;
2184
2185 lockdep_assert_held(&mvm->mutex);
2186
2187 if (!iwl_mvm_is_dqa_supported(mvm))
2188 return 0;
2189
2190 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2191 IWL_MAX_TID_COUNT, 0);
2192
2193 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2194 if (ret)
2195 IWL_WARN(mvm, "Failed sending remove station\n");
2196
2197 return ret;
2198 }
2199
2200 #define IWL_MAX_RX_BA_SESSIONS 16
2201
2202 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2203 {
2204 struct iwl_mvm_delba_notif notif = {
2205 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2206 .metadata.sync = 1,
2207 .delba.baid = baid,
2208 };
2209 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2210 };
2211
2212 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2213 struct iwl_mvm_baid_data *data)
2214 {
2215 int i;
2216
2217 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2218
2219 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2220 int j;
2221 struct iwl_mvm_reorder_buffer *reorder_buf =
2222 &data->reorder_buf[i];
2223
2224 spin_lock_bh(&reorder_buf->lock);
2225 if (likely(!reorder_buf->num_stored)) {
2226 spin_unlock_bh(&reorder_buf->lock);
2227 continue;
2228 }
2229
2230 /*
2231 * This shouldn't happen in regular DELBA since the internal
2232 * delBA notification should trigger a release of all frames in
2233 * the reorder buffer.
2234 */
2235 WARN_ON(1);
2236
2237 for (j = 0; j < reorder_buf->buf_size; j++)
2238 __skb_queue_purge(&reorder_buf->entries[j]);
2239 /*
2240 * Prevent timer re-arm. This prevents a very far fetched case
2241 * where we timed out on the notification. There may be prior
2242 * RX frames pending in the RX queue before the notification
2243 * that might get processed between now and the actual deletion
2244 * and we would re-arm the timer although we are deleting the
2245 * reorder buffer.
2246 */
2247 reorder_buf->removed = true;
2248 spin_unlock_bh(&reorder_buf->lock);
2249 del_timer_sync(&reorder_buf->reorder_timer);
2250 }
2251 }
2252
2253 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2254 u32 sta_id,
2255 struct iwl_mvm_baid_data *data,
2256 u16 ssn, u8 buf_size)
2257 {
2258 int i;
2259
2260 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2261 struct iwl_mvm_reorder_buffer *reorder_buf =
2262 &data->reorder_buf[i];
2263 int j;
2264
2265 reorder_buf->num_stored = 0;
2266 reorder_buf->head_sn = ssn;
2267 reorder_buf->buf_size = buf_size;
2268 /* rx reorder timer */
2269 reorder_buf->reorder_timer.function =
2270 iwl_mvm_reorder_timer_expired;
2271 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2272 init_timer(&reorder_buf->reorder_timer);
2273 spin_lock_init(&reorder_buf->lock);
2274 reorder_buf->mvm = mvm;
2275 reorder_buf->queue = i;
2276 reorder_buf->sta_id = sta_id;
2277 reorder_buf->valid = false;
2278 for (j = 0; j < reorder_buf->buf_size; j++)
2279 __skb_queue_head_init(&reorder_buf->entries[j]);
2280 }
2281 }
2282
2283 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2284 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2285 {
2286 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2287 struct iwl_mvm_add_sta_cmd cmd = {};
2288 struct iwl_mvm_baid_data *baid_data = NULL;
2289 int ret;
2290 u32 status;
2291
2292 lockdep_assert_held(&mvm->mutex);
2293
2294 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2295 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2296 return -ENOSPC;
2297 }
2298
2299 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2300 /*
2301 * Allocate here so if allocation fails we can bail out early
2302 * before starting the BA session in the firmware
2303 */
2304 baid_data = kzalloc(sizeof(*baid_data) +
2305 mvm->trans->num_rx_queues *
2306 sizeof(baid_data->reorder_buf[0]),
2307 GFP_KERNEL);
2308 if (!baid_data)
2309 return -ENOMEM;
2310 }
2311
2312 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2313 cmd.sta_id = mvm_sta->sta_id;
2314 cmd.add_modify = STA_MODE_MODIFY;
2315 if (start) {
2316 cmd.add_immediate_ba_tid = (u8) tid;
2317 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2318 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2319 } else {
2320 cmd.remove_immediate_ba_tid = (u8) tid;
2321 }
2322 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2323 STA_MODIFY_REMOVE_BA_TID;
2324
2325 status = ADD_STA_SUCCESS;
2326 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2327 iwl_mvm_add_sta_cmd_size(mvm),
2328 &cmd, &status);
2329 if (ret)
2330 goto out_free;
2331
2332 switch (status & IWL_ADD_STA_STATUS_MASK) {
2333 case ADD_STA_SUCCESS:
2334 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2335 start ? "start" : "stopp");
2336 break;
2337 case ADD_STA_IMMEDIATE_BA_FAILURE:
2338 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2339 ret = -ENOSPC;
2340 break;
2341 default:
2342 ret = -EIO;
2343 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2344 start ? "start" : "stopp", status);
2345 break;
2346 }
2347
2348 if (ret)
2349 goto out_free;
2350
2351 if (start) {
2352 u8 baid;
2353
2354 mvm->rx_ba_sessions++;
2355
2356 if (!iwl_mvm_has_new_rx_api(mvm))
2357 return 0;
2358
2359 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2360 ret = -EINVAL;
2361 goto out_free;
2362 }
2363 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2364 IWL_ADD_STA_BAID_SHIFT);
2365 baid_data->baid = baid;
2366 baid_data->timeout = timeout;
2367 baid_data->last_rx = jiffies;
2368 setup_timer(&baid_data->session_timer,
2369 iwl_mvm_rx_agg_session_expired,
2370 (unsigned long)&mvm->baid_map[baid]);
2371 baid_data->mvm = mvm;
2372 baid_data->tid = tid;
2373 baid_data->sta_id = mvm_sta->sta_id;
2374
2375 mvm_sta->tid_to_baid[tid] = baid;
2376 if (timeout)
2377 mod_timer(&baid_data->session_timer,
2378 TU_TO_EXP_TIME(timeout * 2));
2379
2380 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2381 baid_data, ssn, buf_size);
2382 /*
2383 * protect the BA data with RCU to cover a case where our
2384 * internal RX sync mechanism will timeout (not that it's
2385 * supposed to happen) and we will free the session data while
2386 * RX is being processed in parallel
2387 */
2388 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2389 mvm_sta->sta_id, tid, baid);
2390 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2391 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2392 } else {
2393 u8 baid = mvm_sta->tid_to_baid[tid];
2394
2395 if (mvm->rx_ba_sessions > 0)
2396 /* check that restart flow didn't zero the counter */
2397 mvm->rx_ba_sessions--;
2398 if (!iwl_mvm_has_new_rx_api(mvm))
2399 return 0;
2400
2401 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2402 return -EINVAL;
2403
2404 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2405 if (WARN_ON(!baid_data))
2406 return -EINVAL;
2407
2408 /* synchronize all rx queues so we can safely delete */
2409 iwl_mvm_free_reorder(mvm, baid_data);
2410 del_timer_sync(&baid_data->session_timer);
2411 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2412 kfree_rcu(baid_data, rcu_head);
2413 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2414 }
2415 return 0;
2416
2417 out_free:
2418 kfree(baid_data);
2419 return ret;
2420 }
2421
2422 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2423 int tid, u8 queue, bool start)
2424 {
2425 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2426 struct iwl_mvm_add_sta_cmd cmd = {};
2427 int ret;
2428 u32 status;
2429
2430 lockdep_assert_held(&mvm->mutex);
2431
2432 if (start) {
2433 mvm_sta->tfd_queue_msk |= BIT(queue);
2434 mvm_sta->tid_disable_agg &= ~BIT(tid);
2435 } else {
2436 /* In DQA-mode the queue isn't removed on agg termination */
2437 if (!iwl_mvm_is_dqa_supported(mvm))
2438 mvm_sta->tfd_queue_msk &= ~BIT(queue);
2439 mvm_sta->tid_disable_agg |= BIT(tid);
2440 }
2441
2442 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2443 cmd.sta_id = mvm_sta->sta_id;
2444 cmd.add_modify = STA_MODE_MODIFY;
2445 if (!iwl_mvm_has_new_tx_api(mvm))
2446 cmd.modify_mask = STA_MODIFY_QUEUES;
2447 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2448 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2449 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2450
2451 status = ADD_STA_SUCCESS;
2452 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2453 iwl_mvm_add_sta_cmd_size(mvm),
2454 &cmd, &status);
2455 if (ret)
2456 return ret;
2457
2458 switch (status & IWL_ADD_STA_STATUS_MASK) {
2459 case ADD_STA_SUCCESS:
2460 break;
2461 default:
2462 ret = -EIO;
2463 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2464 start ? "start" : "stopp", status);
2465 break;
2466 }
2467
2468 return ret;
2469 }
2470
2471 const u8 tid_to_mac80211_ac[] = {
2472 IEEE80211_AC_BE,
2473 IEEE80211_AC_BK,
2474 IEEE80211_AC_BK,
2475 IEEE80211_AC_BE,
2476 IEEE80211_AC_VI,
2477 IEEE80211_AC_VI,
2478 IEEE80211_AC_VO,
2479 IEEE80211_AC_VO,
2480 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2481 };
2482
2483 static const u8 tid_to_ucode_ac[] = {
2484 AC_BE,
2485 AC_BK,
2486 AC_BK,
2487 AC_BE,
2488 AC_VI,
2489 AC_VI,
2490 AC_VO,
2491 AC_VO,
2492 };
2493
2494 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2495 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2496 {
2497 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2498 struct iwl_mvm_tid_data *tid_data;
2499 int txq_id;
2500 int ret;
2501
2502 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2503 return -EINVAL;
2504
2505 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2506 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2507 mvmsta->tid_data[tid].state);
2508 return -ENXIO;
2509 }
2510
2511 lockdep_assert_held(&mvm->mutex);
2512
2513 spin_lock_bh(&mvmsta->lock);
2514
2515 /* possible race condition - we entered D0i3 while starting agg */
2516 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2517 spin_unlock_bh(&mvmsta->lock);
2518 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2519 return -EIO;
2520 }
2521
2522 spin_lock(&mvm->queue_info_lock);
2523
2524 /*
2525 * Note the possible cases:
2526 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2527 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2528 * one and mark it as reserved
2529 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
2530 * non-DQA mode, since the TXQ hasn't yet been allocated
2531 * Don't support case 3 for new TX path as it is not expected to happen
2532 * and aggregation will be offloaded soon anyway
2533 */
2534 txq_id = mvmsta->tid_data[tid].txq_id;
2535 if (iwl_mvm_has_new_tx_api(mvm)) {
2536 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2537 ret = -ENXIO;
2538 goto release_locks;
2539 }
2540 } else if (iwl_mvm_is_dqa_supported(mvm) &&
2541 unlikely(mvm->queue_info[txq_id].status ==
2542 IWL_MVM_QUEUE_SHARED)) {
2543 ret = -ENXIO;
2544 IWL_DEBUG_TX_QUEUES(mvm,
2545 "Can't start tid %d agg on shared queue!\n",
2546 tid);
2547 goto release_locks;
2548 } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2549 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2550 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2551 mvm->first_agg_queue,
2552 mvm->last_agg_queue);
2553 if (txq_id < 0) {
2554 ret = txq_id;
2555 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2556 goto release_locks;
2557 }
2558 /*
2559 * TXQ shouldn't be in inactive mode for non-DQA, so getting
2560 * an inactive queue from iwl_mvm_find_free_queue() is
2561 * certainly a bug
2562 */
2563 WARN_ON(mvm->queue_info[txq_id].status ==
2564 IWL_MVM_QUEUE_INACTIVE);
2565
2566 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2567 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2568 }
2569
2570 spin_unlock(&mvm->queue_info_lock);
2571
2572 IWL_DEBUG_TX_QUEUES(mvm,
2573 "AGG for tid %d will be on queue #%d\n",
2574 tid, txq_id);
2575
2576 tid_data = &mvmsta->tid_data[tid];
2577 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2578 tid_data->txq_id = txq_id;
2579 *ssn = tid_data->ssn;
2580
2581 IWL_DEBUG_TX_QUEUES(mvm,
2582 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2583 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2584 tid_data->next_reclaimed);
2585
2586 if (tid_data->ssn == tid_data->next_reclaimed) {
2587 tid_data->state = IWL_AGG_STARTING;
2588 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2589 } else {
2590 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2591 }
2592
2593 ret = 0;
2594 goto out;
2595
2596 release_locks:
2597 spin_unlock(&mvm->queue_info_lock);
2598 out:
2599 spin_unlock_bh(&mvmsta->lock);
2600
2601 return ret;
2602 }
2603
2604 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2605 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2606 bool amsdu)
2607 {
2608 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2609 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2610 unsigned int wdg_timeout =
2611 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2612 int queue, ret;
2613 bool alloc_queue = true;
2614 enum iwl_mvm_queue_status queue_status;
2615 u16 ssn;
2616
2617 struct iwl_trans_txq_scd_cfg cfg = {
2618 .sta_id = mvmsta->sta_id,
2619 .tid = tid,
2620 .frame_limit = buf_size,
2621 .aggregate = true,
2622 };
2623
2624 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2625 != IWL_MAX_TID_COUNT);
2626
2627 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2628
2629 spin_lock_bh(&mvmsta->lock);
2630 ssn = tid_data->ssn;
2631 queue = tid_data->txq_id;
2632 tid_data->state = IWL_AGG_ON;
2633 mvmsta->agg_tids |= BIT(tid);
2634 tid_data->ssn = 0xffff;
2635 tid_data->amsdu_in_ampdu_allowed = amsdu;
2636 spin_unlock_bh(&mvmsta->lock);
2637
2638 if (iwl_mvm_has_new_tx_api(mvm)) {
2639 /*
2640 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2641 * no need to check queue's status
2642 */
2643 if (buf_size < mvmsta->max_agg_bufsize)
2644 return -ENOTSUPP;
2645
2646 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2647 if (ret)
2648 return -EIO;
2649 goto out;
2650 }
2651
2652 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2653
2654 spin_lock_bh(&mvm->queue_info_lock);
2655 queue_status = mvm->queue_info[queue].status;
2656 spin_unlock_bh(&mvm->queue_info_lock);
2657
2658 /* In DQA mode, the existing queue might need to be reconfigured */
2659 if (iwl_mvm_is_dqa_supported(mvm)) {
2660 /* Maybe there is no need to even alloc a queue... */
2661 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2662 alloc_queue = false;
2663
2664 /*
2665 * Only reconfig the SCD for the queue if the window size has
2666 * changed from current (become smaller)
2667 */
2668 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2669 /*
2670 * If reconfiguring an existing queue, it first must be
2671 * drained
2672 */
2673 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2674 BIT(queue));
2675 if (ret) {
2676 IWL_ERR(mvm,
2677 "Error draining queue before reconfig\n");
2678 return ret;
2679 }
2680
2681 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2682 mvmsta->sta_id, tid,
2683 buf_size, ssn);
2684 if (ret) {
2685 IWL_ERR(mvm,
2686 "Error reconfiguring TXQ #%d\n", queue);
2687 return ret;
2688 }
2689 }
2690 }
2691
2692 if (alloc_queue)
2693 iwl_mvm_enable_txq(mvm, queue,
2694 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2695 &cfg, wdg_timeout);
2696
2697 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2698 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2699 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2700 if (ret)
2701 return -EIO;
2702 }
2703
2704 /* No need to mark as reserved */
2705 spin_lock_bh(&mvm->queue_info_lock);
2706 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2707 spin_unlock_bh(&mvm->queue_info_lock);
2708
2709 out:
2710 /*
2711 * Even though in theory the peer could have different
2712 * aggregation reorder buffer sizes for different sessions,
2713 * our ucode doesn't allow for that and has a global limit
2714 * for each station. Therefore, use the minimum of all the
2715 * aggregation sessions and our default value.
2716 */
2717 mvmsta->max_agg_bufsize =
2718 min(mvmsta->max_agg_bufsize, buf_size);
2719 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2720
2721 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2722 sta->addr, tid);
2723
2724 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2725 }
2726
2727 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2728 struct iwl_mvm_sta *mvmsta,
2729 u16 txq_id)
2730 {
2731 if (iwl_mvm_has_new_tx_api(mvm))
2732 return;
2733
2734 spin_lock_bh(&mvm->queue_info_lock);
2735 /*
2736 * The TXQ is marked as reserved only if no traffic came through yet
2737 * This means no traffic has been sent on this TID (agg'd or not), so
2738 * we no longer have use for the queue. Since it hasn't even been
2739 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2740 * free.
2741 */
2742 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2743 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2744
2745 spin_unlock_bh(&mvm->queue_info_lock);
2746 }
2747
2748 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2749 struct ieee80211_sta *sta, u16 tid)
2750 {
2751 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2752 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2753 u16 txq_id;
2754 int err;
2755
2756 /*
2757 * If mac80211 is cleaning its state, then say that we finished since
2758 * our state has been cleared anyway.
2759 */
2760 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2761 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2762 return 0;
2763 }
2764
2765 spin_lock_bh(&mvmsta->lock);
2766
2767 txq_id = tid_data->txq_id;
2768
2769 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2770 mvmsta->sta_id, tid, txq_id, tid_data->state);
2771
2772 mvmsta->agg_tids &= ~BIT(tid);
2773
2774 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2775
2776 switch (tid_data->state) {
2777 case IWL_AGG_ON:
2778 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2779
2780 IWL_DEBUG_TX_QUEUES(mvm,
2781 "ssn = %d, next_recl = %d\n",
2782 tid_data->ssn, tid_data->next_reclaimed);
2783
2784 /* There are still packets for this RA / TID in the HW */
2785 if (tid_data->ssn != tid_data->next_reclaimed) {
2786 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2787 err = 0;
2788 break;
2789 }
2790
2791 tid_data->ssn = 0xffff;
2792 tid_data->state = IWL_AGG_OFF;
2793 spin_unlock_bh(&mvmsta->lock);
2794
2795 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2796
2797 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2798
2799 if (!iwl_mvm_is_dqa_supported(mvm)) {
2800 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2801
2802 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2803 }
2804 return 0;
2805 case IWL_AGG_STARTING:
2806 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2807 /*
2808 * The agg session has been stopped before it was set up. This
2809 * can happen when the AddBA timer times out for example.
2810 */
2811
2812 /* No barriers since we are under mutex */
2813 lockdep_assert_held(&mvm->mutex);
2814
2815 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2816 tid_data->state = IWL_AGG_OFF;
2817 err = 0;
2818 break;
2819 default:
2820 IWL_ERR(mvm,
2821 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2822 mvmsta->sta_id, tid, tid_data->state);
2823 IWL_ERR(mvm,
2824 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2825 err = -EINVAL;
2826 }
2827
2828 spin_unlock_bh(&mvmsta->lock);
2829
2830 return err;
2831 }
2832
2833 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2834 struct ieee80211_sta *sta, u16 tid)
2835 {
2836 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2837 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2838 u16 txq_id;
2839 enum iwl_mvm_agg_state old_state;
2840
2841 /*
2842 * First set the agg state to OFF to avoid calling
2843 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2844 */
2845 spin_lock_bh(&mvmsta->lock);
2846 txq_id = tid_data->txq_id;
2847 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2848 mvmsta->sta_id, tid, txq_id, tid_data->state);
2849 old_state = tid_data->state;
2850 tid_data->state = IWL_AGG_OFF;
2851 mvmsta->agg_tids &= ~BIT(tid);
2852 spin_unlock_bh(&mvmsta->lock);
2853
2854 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2855
2856 if (old_state >= IWL_AGG_ON) {
2857 iwl_mvm_drain_sta(mvm, mvmsta, true);
2858 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2859 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2860 iwl_trans_wait_tx_queues_empty(mvm->trans,
2861 mvmsta->tfd_queue_msk);
2862 iwl_mvm_drain_sta(mvm, mvmsta, false);
2863
2864 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2865
2866 if (!iwl_mvm_is_dqa_supported(mvm)) {
2867 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2868
2869 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2870 tid, 0);
2871 }
2872 }
2873
2874 return 0;
2875 }
2876
2877 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2878 {
2879 int i, max = -1, max_offs = -1;
2880
2881 lockdep_assert_held(&mvm->mutex);
2882
2883 /* Pick the unused key offset with the highest 'deleted'
2884 * counter. Every time a key is deleted, all the counters
2885 * are incremented and the one that was just deleted is
2886 * reset to zero. Thus, the highest counter is the one
2887 * that was deleted longest ago. Pick that one.
2888 */
2889 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2890 if (test_bit(i, mvm->fw_key_table))
2891 continue;
2892 if (mvm->fw_key_deleted[i] > max) {
2893 max = mvm->fw_key_deleted[i];
2894 max_offs = i;
2895 }
2896 }
2897
2898 if (max_offs < 0)
2899 return STA_KEY_IDX_INVALID;
2900
2901 return max_offs;
2902 }
2903
2904 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2905 struct ieee80211_vif *vif,
2906 struct ieee80211_sta *sta)
2907 {
2908 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2909
2910 if (sta)
2911 return iwl_mvm_sta_from_mac80211(sta);
2912
2913 /*
2914 * The device expects GTKs for station interfaces to be
2915 * installed as GTKs for the AP station. If we have no
2916 * station ID, then use AP's station ID.
2917 */
2918 if (vif->type == NL80211_IFTYPE_STATION &&
2919 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2920 u8 sta_id = mvmvif->ap_sta_id;
2921
2922 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2923 lockdep_is_held(&mvm->mutex));
2924
2925 /*
2926 * It is possible that the 'sta' parameter is NULL,
2927 * for example when a GTK is removed - the sta_id will then
2928 * be the AP ID, and no station was passed by mac80211.
2929 */
2930 if (IS_ERR_OR_NULL(sta))
2931 return NULL;
2932
2933 return iwl_mvm_sta_from_mac80211(sta);
2934 }
2935
2936 return NULL;
2937 }
2938
2939 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2940 struct iwl_mvm_sta *mvm_sta,
2941 struct ieee80211_key_conf *key, bool mcast,
2942 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2943 u8 key_offset)
2944 {
2945 union {
2946 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2947 struct iwl_mvm_add_sta_key_cmd cmd;
2948 } u = {};
2949 __le16 key_flags;
2950 int ret;
2951 u32 status;
2952 u16 keyidx;
2953 u64 pn = 0;
2954 int i, size;
2955 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2956 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2957
2958 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2959 STA_KEY_FLG_KEYID_MSK;
2960 key_flags = cpu_to_le16(keyidx);
2961 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2962
2963 switch (key->cipher) {
2964 case WLAN_CIPHER_SUITE_TKIP:
2965 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2966 if (new_api) {
2967 memcpy((void *)&u.cmd.tx_mic_key,
2968 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2969 IWL_MIC_KEY_SIZE);
2970
2971 memcpy((void *)&u.cmd.rx_mic_key,
2972 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2973 IWL_MIC_KEY_SIZE);
2974 pn = atomic64_read(&key->tx_pn);
2975
2976 } else {
2977 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2978 for (i = 0; i < 5; i++)
2979 u.cmd_v1.tkip_rx_ttak[i] =
2980 cpu_to_le16(tkip_p1k[i]);
2981 }
2982 memcpy(u.cmd.common.key, key->key, key->keylen);
2983 break;
2984 case WLAN_CIPHER_SUITE_CCMP:
2985 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2986 memcpy(u.cmd.common.key, key->key, key->keylen);
2987 if (new_api)
2988 pn = atomic64_read(&key->tx_pn);
2989 break;
2990 case WLAN_CIPHER_SUITE_WEP104:
2991 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2992 /* fall through */
2993 case WLAN_CIPHER_SUITE_WEP40:
2994 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2995 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2996 break;
2997 case WLAN_CIPHER_SUITE_GCMP_256:
2998 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2999 /* fall through */
3000 case WLAN_CIPHER_SUITE_GCMP:
3001 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3002 memcpy(u.cmd.common.key, key->key, key->keylen);
3003 if (new_api)
3004 pn = atomic64_read(&key->tx_pn);
3005 break;
3006 default:
3007 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3008 memcpy(u.cmd.common.key, key->key, key->keylen);
3009 }
3010
3011 if (mcast)
3012 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3013
3014 u.cmd.common.key_offset = key_offset;
3015 u.cmd.common.key_flags = key_flags;
3016 u.cmd.common.sta_id = mvm_sta->sta_id;
3017
3018 if (new_api) {
3019 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3020 size = sizeof(u.cmd);
3021 } else {
3022 size = sizeof(u.cmd_v1);
3023 }
3024
3025 status = ADD_STA_SUCCESS;
3026 if (cmd_flags & CMD_ASYNC)
3027 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3028 &u.cmd);
3029 else
3030 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3031 &u.cmd, &status);
3032
3033 switch (status) {
3034 case ADD_STA_SUCCESS:
3035 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3036 break;
3037 default:
3038 ret = -EIO;
3039 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3040 break;
3041 }
3042
3043 return ret;
3044 }
3045
3046 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3047 struct ieee80211_key_conf *keyconf,
3048 u8 sta_id, bool remove_key)
3049 {
3050 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3051
3052 /* verify the key details match the required command's expectations */
3053 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3054 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3055 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3056 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3057 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3058 return -EINVAL;
3059
3060 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3061 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3062 return -EINVAL;
3063
3064 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3065 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3066
3067 if (remove_key) {
3068 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3069 } else {
3070 struct ieee80211_key_seq seq;
3071 const u8 *pn;
3072
3073 switch (keyconf->cipher) {
3074 case WLAN_CIPHER_SUITE_AES_CMAC:
3075 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3076 break;
3077 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3078 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3079 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3080 break;
3081 default:
3082 return -EINVAL;
3083 }
3084
3085 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3086 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3087 igtk_cmd.ctrl_flags |=
3088 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3089 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3090 pn = seq.aes_cmac.pn;
3091 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3092 ((u64) pn[4] << 8) |
3093 ((u64) pn[3] << 16) |
3094 ((u64) pn[2] << 24) |
3095 ((u64) pn[1] << 32) |
3096 ((u64) pn[0] << 40));
3097 }
3098
3099 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3100 remove_key ? "removing" : "installing",
3101 igtk_cmd.sta_id);
3102
3103 if (!iwl_mvm_has_new_rx_api(mvm)) {
3104 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3105 .ctrl_flags = igtk_cmd.ctrl_flags,
3106 .key_id = igtk_cmd.key_id,
3107 .sta_id = igtk_cmd.sta_id,
3108 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3109 };
3110
3111 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3112 ARRAY_SIZE(igtk_cmd_v1.igtk));
3113 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3114 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3115 }
3116 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3117 sizeof(igtk_cmd), &igtk_cmd);
3118 }
3119
3120
3121 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3122 struct ieee80211_vif *vif,
3123 struct ieee80211_sta *sta)
3124 {
3125 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3126
3127 if (sta)
3128 return sta->addr;
3129
3130 if (vif->type == NL80211_IFTYPE_STATION &&
3131 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3132 u8 sta_id = mvmvif->ap_sta_id;
3133 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3134 lockdep_is_held(&mvm->mutex));
3135 return sta->addr;
3136 }
3137
3138
3139 return NULL;
3140 }
3141
3142 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3143 struct ieee80211_vif *vif,
3144 struct ieee80211_sta *sta,
3145 struct ieee80211_key_conf *keyconf,
3146 u8 key_offset,
3147 bool mcast)
3148 {
3149 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3150 int ret;
3151 const u8 *addr;
3152 struct ieee80211_key_seq seq;
3153 u16 p1k[5];
3154
3155 switch (keyconf->cipher) {
3156 case WLAN_CIPHER_SUITE_TKIP:
3157 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3158 /* get phase 1 key from mac80211 */
3159 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3160 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3161 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3162 seq.tkip.iv32, p1k, 0, key_offset);
3163 break;
3164 case WLAN_CIPHER_SUITE_CCMP:
3165 case WLAN_CIPHER_SUITE_WEP40:
3166 case WLAN_CIPHER_SUITE_WEP104:
3167 case WLAN_CIPHER_SUITE_GCMP:
3168 case WLAN_CIPHER_SUITE_GCMP_256:
3169 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3170 0, NULL, 0, key_offset);
3171 break;
3172 default:
3173 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3174 0, NULL, 0, key_offset);
3175 }
3176
3177 return ret;
3178 }
3179
3180 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3181 struct ieee80211_key_conf *keyconf,
3182 bool mcast)
3183 {
3184 union {
3185 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3186 struct iwl_mvm_add_sta_key_cmd cmd;
3187 } u = {};
3188 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3189 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3190 __le16 key_flags;
3191 int ret, size;
3192 u32 status;
3193
3194 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3195 STA_KEY_FLG_KEYID_MSK);
3196 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3197 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3198
3199 if (mcast)
3200 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3201
3202 /*
3203 * The fields assigned here are in the same location at the start
3204 * of the command, so we can do this union trick.
3205 */
3206 u.cmd.common.key_flags = key_flags;
3207 u.cmd.common.key_offset = keyconf->hw_key_idx;
3208 u.cmd.common.sta_id = sta_id;
3209
3210 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3211
3212 status = ADD_STA_SUCCESS;
3213 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3214 &status);
3215
3216 switch (status) {
3217 case ADD_STA_SUCCESS:
3218 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3219 break;
3220 default:
3221 ret = -EIO;
3222 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3223 break;
3224 }
3225
3226 return ret;
3227 }
3228
3229 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3230 struct ieee80211_vif *vif,
3231 struct ieee80211_sta *sta,
3232 struct ieee80211_key_conf *keyconf,
3233 u8 key_offset)
3234 {
3235 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3236 struct iwl_mvm_sta *mvm_sta;
3237 u8 sta_id;
3238 int ret;
3239 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3240
3241 lockdep_assert_held(&mvm->mutex);
3242
3243 /* Get the station id from the mvm local station table */
3244 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3245 if (!mvm_sta) {
3246 IWL_ERR(mvm, "Failed to find station\n");
3247 return -EINVAL;
3248 }
3249 sta_id = mvm_sta->sta_id;
3250
3251 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3252 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3253 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3254 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3255 goto end;
3256 }
3257
3258 /*
3259 * It is possible that the 'sta' parameter is NULL, and thus
3260 * there is a need to retrieve the sta from the local station table.
3261 */
3262 if (!sta) {
3263 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3264 lockdep_is_held(&mvm->mutex));
3265 if (IS_ERR_OR_NULL(sta)) {
3266 IWL_ERR(mvm, "Invalid station id\n");
3267 return -EINVAL;
3268 }
3269 }
3270
3271 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3272 return -EINVAL;
3273
3274 /* If the key_offset is not pre-assigned, we need to find a
3275 * new offset to use. In normal cases, the offset is not
3276 * pre-assigned, but during HW_RESTART we want to reuse the
3277 * same indices, so we pass them when this function is called.
3278 *
3279 * In D3 entry, we need to hardcoded the indices (because the
3280 * firmware hardcodes the PTK offset to 0). In this case, we
3281 * need to make sure we don't overwrite the hw_key_idx in the
3282 * keyconf structure, because otherwise we cannot configure
3283 * the original ones back when resuming.
3284 */
3285 if (key_offset == STA_KEY_IDX_INVALID) {
3286 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3287 if (key_offset == STA_KEY_IDX_INVALID)
3288 return -ENOSPC;
3289 keyconf->hw_key_idx = key_offset;
3290 }
3291
3292 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3293 if (ret)
3294 goto end;
3295
3296 /*
3297 * For WEP, the same key is used for multicast and unicast. Upload it
3298 * again, using the same key offset, and now pointing the other one
3299 * to the same key slot (offset).
3300 * If this fails, remove the original as well.
3301 */
3302 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3303 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
3304 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3305 key_offset, !mcast);
3306 if (ret) {
3307 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3308 goto end;
3309 }
3310 }
3311
3312 __set_bit(key_offset, mvm->fw_key_table);
3313
3314 end:
3315 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3316 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3317 sta ? sta->addr : zero_addr, ret);
3318 return ret;
3319 }
3320
3321 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3322 struct ieee80211_vif *vif,
3323 struct ieee80211_sta *sta,
3324 struct ieee80211_key_conf *keyconf)
3325 {
3326 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3327 struct iwl_mvm_sta *mvm_sta;
3328 u8 sta_id = IWL_MVM_INVALID_STA;
3329 int ret, i;
3330
3331 lockdep_assert_held(&mvm->mutex);
3332
3333 /* Get the station from the mvm local station table */
3334 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3335 if (mvm_sta)
3336 sta_id = mvm_sta->sta_id;
3337
3338 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3339 keyconf->keyidx, sta_id);
3340
3341 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3342 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3343 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3344 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3345
3346 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3347 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3348 keyconf->hw_key_idx);
3349 return -ENOENT;
3350 }
3351
3352 /* track which key was deleted last */
3353 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3354 if (mvm->fw_key_deleted[i] < U8_MAX)
3355 mvm->fw_key_deleted[i]++;
3356 }
3357 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3358
3359 if (!mvm_sta) {
3360 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3361 return 0;
3362 }
3363
3364 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3365 if (ret)
3366 return ret;
3367
3368 /* delete WEP key twice to get rid of (now useless) offset */
3369 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3370 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3371 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3372
3373 return ret;
3374 }
3375
3376 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3377 struct ieee80211_vif *vif,
3378 struct ieee80211_key_conf *keyconf,
3379 struct ieee80211_sta *sta, u32 iv32,
3380 u16 *phase1key)
3381 {
3382 struct iwl_mvm_sta *mvm_sta;
3383 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3384
3385 rcu_read_lock();
3386
3387 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3388 if (WARN_ON_ONCE(!mvm_sta))
3389 goto unlock;
3390 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
3391 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3392
3393 unlock:
3394 rcu_read_unlock();
3395 }
3396
3397 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3398 struct ieee80211_sta *sta)
3399 {
3400 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3401 struct iwl_mvm_add_sta_cmd cmd = {
3402 .add_modify = STA_MODE_MODIFY,
3403 .sta_id = mvmsta->sta_id,
3404 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3405 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3406 };
3407 int ret;
3408
3409 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3410 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3411 if (ret)
3412 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3413 }
3414
3415 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3416 struct ieee80211_sta *sta,
3417 enum ieee80211_frame_release_type reason,
3418 u16 cnt, u16 tids, bool more_data,
3419 bool single_sta_queue)
3420 {
3421 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3422 struct iwl_mvm_add_sta_cmd cmd = {
3423 .add_modify = STA_MODE_MODIFY,
3424 .sta_id = mvmsta->sta_id,
3425 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3426 .sleep_tx_count = cpu_to_le16(cnt),
3427 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3428 };
3429 int tid, ret;
3430 unsigned long _tids = tids;
3431
3432 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3433 * Note that this field is reserved and unused by firmware not
3434 * supporting GO uAPSD, so it's safe to always do this.
3435 */
3436 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3437 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3438
3439 /* If we're releasing frames from aggregation or dqa queues then check
3440 * if all the queues that we're releasing frames from, combined, have:
3441 * - more frames than the service period, in which case more_data
3442 * needs to be set
3443 * - fewer than 'cnt' frames, in which case we need to adjust the
3444 * firmware command (but do that unconditionally)
3445 */
3446 if (single_sta_queue) {
3447 int remaining = cnt;
3448 int sleep_tx_count;
3449
3450 spin_lock_bh(&mvmsta->lock);
3451 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3452 struct iwl_mvm_tid_data *tid_data;
3453 u16 n_queued;
3454
3455 tid_data = &mvmsta->tid_data[tid];
3456 if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3457 tid_data->state != IWL_AGG_ON &&
3458 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3459 "TID %d state is %d\n",
3460 tid, tid_data->state)) {
3461 spin_unlock_bh(&mvmsta->lock);
3462 ieee80211_sta_eosp(sta);
3463 return;
3464 }
3465
3466 n_queued = iwl_mvm_tid_queued(tid_data);
3467 if (n_queued > remaining) {
3468 more_data = true;
3469 remaining = 0;
3470 break;
3471 }
3472 remaining -= n_queued;
3473 }
3474 sleep_tx_count = cnt - remaining;
3475 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3476 mvmsta->sleep_tx_count = sleep_tx_count;
3477 spin_unlock_bh(&mvmsta->lock);
3478
3479 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3480 if (WARN_ON(cnt - remaining == 0)) {
3481 ieee80211_sta_eosp(sta);
3482 return;
3483 }
3484 }
3485
3486 /* Note: this is ignored by firmware not supporting GO uAPSD */
3487 if (more_data)
3488 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3489
3490 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3491 mvmsta->next_status_eosp = true;
3492 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3493 } else {
3494 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3495 }
3496
3497 /* block the Tx queues until the FW updated the sleep Tx count */
3498 iwl_trans_block_txq_ptrs(mvm->trans, true);
3499
3500 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3501 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3502 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3503 if (ret)
3504 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3505 }
3506
3507 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3508 struct iwl_rx_cmd_buffer *rxb)
3509 {
3510 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3511 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3512 struct ieee80211_sta *sta;
3513 u32 sta_id = le32_to_cpu(notif->sta_id);
3514
3515 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3516 return;
3517
3518 rcu_read_lock();
3519 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3520 if (!IS_ERR_OR_NULL(sta))
3521 ieee80211_sta_eosp(sta);
3522 rcu_read_unlock();
3523 }
3524
3525 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3526 struct iwl_mvm_sta *mvmsta, bool disable)
3527 {
3528 struct iwl_mvm_add_sta_cmd cmd = {
3529 .add_modify = STA_MODE_MODIFY,
3530 .sta_id = mvmsta->sta_id,
3531 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3532 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3533 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3534 };
3535 int ret;
3536
3537 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3538 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3539 if (ret)
3540 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3541 }
3542
3543 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3544 struct ieee80211_sta *sta,
3545 bool disable)
3546 {
3547 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3548
3549 spin_lock_bh(&mvm_sta->lock);
3550
3551 if (mvm_sta->disable_tx == disable) {
3552 spin_unlock_bh(&mvm_sta->lock);
3553 return;
3554 }
3555
3556 mvm_sta->disable_tx = disable;
3557
3558 /*
3559 * Tell mac80211 to start/stop queuing tx for this station,
3560 * but don't stop queuing if there are still pending frames
3561 * for this station.
3562 */
3563 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3564 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3565
3566 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3567
3568 spin_unlock_bh(&mvm_sta->lock);
3569 }
3570
3571 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3572 struct iwl_mvm_vif *mvmvif,
3573 struct iwl_mvm_int_sta *sta,
3574 bool disable)
3575 {
3576 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3577 struct iwl_mvm_add_sta_cmd cmd = {
3578 .add_modify = STA_MODE_MODIFY,
3579 .sta_id = sta->sta_id,
3580 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3581 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3582 .mac_id_n_color = cpu_to_le32(id),
3583 };
3584 int ret;
3585
3586 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3587 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3588 if (ret)
3589 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3590 }
3591
3592 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3593 struct iwl_mvm_vif *mvmvif,
3594 bool disable)
3595 {
3596 struct ieee80211_sta *sta;
3597 struct iwl_mvm_sta *mvm_sta;
3598 int i;
3599
3600 lockdep_assert_held(&mvm->mutex);
3601
3602 /* Block/unblock all the stations of the given mvmvif */
3603 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3604 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3605 lockdep_is_held(&mvm->mutex));
3606 if (IS_ERR_OR_NULL(sta))
3607 continue;
3608
3609 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3610 if (mvm_sta->mac_id_n_color !=
3611 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3612 continue;
3613
3614 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3615 }
3616
3617 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3618 return;
3619
3620 /* Need to block/unblock also multicast station */
3621 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3622 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3623 &mvmvif->mcast_sta, disable);
3624
3625 /*
3626 * Only unblock the broadcast station (FW blocks it for immediate
3627 * quiet, not the driver)
3628 */
3629 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3630 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3631 &mvmvif->bcast_sta, disable);
3632 }
3633
3634 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3635 {
3636 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3637 struct iwl_mvm_sta *mvmsta;
3638
3639 rcu_read_lock();
3640
3641 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3642
3643 if (!WARN_ON(!mvmsta))
3644 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3645
3646 rcu_read_unlock();
3647 }
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