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iwlwifi: mvm: Allow TKIP for AP mode
[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 * Copyright(c) 2018 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 *****************************************************************************/
64 #include <net/mac80211.h>
65
66 #include "mvm.h"
67 #include "sta.h"
68 #include "rs.h"
69
70 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm);
71
72 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
73 u32 sta_id,
74 struct ieee80211_key_conf *key, bool mcast,
75 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
76 u8 key_offset, bool mfp);
77
78 /*
79 * New version of ADD_STA_sta command added new fields at the end of the
80 * structure, so sending the size of the relevant API's structure is enough to
81 * support both API versions.
82 */
83 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
84 {
85 if (iwl_mvm_has_new_rx_api(mvm) ||
86 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
87 return sizeof(struct iwl_mvm_add_sta_cmd);
88 else
89 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
90 }
91
92 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
93 enum nl80211_iftype iftype)
94 {
95 int sta_id;
96 u32 reserved_ids = 0;
97
98 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
99 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
100
101 lockdep_assert_held(&mvm->mutex);
102
103 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
104 if (iftype != NL80211_IFTYPE_STATION)
105 reserved_ids = BIT(0);
106
107 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
108 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
109 if (BIT(sta_id) & reserved_ids)
110 continue;
111
112 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
113 lockdep_is_held(&mvm->mutex)))
114 return sta_id;
115 }
116 return IWL_MVM_INVALID_STA;
117 }
118
119 /* send station add/update command to firmware */
120 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
121 bool update, unsigned int flags)
122 {
123 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
124 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
125 .sta_id = mvm_sta->sta_id,
126 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
127 .add_modify = update ? 1 : 0,
128 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
129 STA_FLG_MIMO_EN_MSK |
130 STA_FLG_RTS_MIMO_PROT),
131 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
132 };
133 int ret;
134 u32 status;
135 u32 agg_size = 0, mpdu_dens = 0;
136
137 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
138 add_sta_cmd.station_type = mvm_sta->sta_type;
139
140 if (!update || (flags & STA_MODIFY_QUEUES)) {
141 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
142
143 if (!iwl_mvm_has_new_tx_api(mvm)) {
144 add_sta_cmd.tfd_queue_msk =
145 cpu_to_le32(mvm_sta->tfd_queue_msk);
146
147 if (flags & STA_MODIFY_QUEUES)
148 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
149 } else {
150 WARN_ON(flags & STA_MODIFY_QUEUES);
151 }
152 }
153
154 switch (sta->bandwidth) {
155 case IEEE80211_STA_RX_BW_160:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
157 /* fall through */
158 case IEEE80211_STA_RX_BW_80:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
160 /* fall through */
161 case IEEE80211_STA_RX_BW_40:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
163 /* fall through */
164 case IEEE80211_STA_RX_BW_20:
165 if (sta->ht_cap.ht_supported)
166 add_sta_cmd.station_flags |=
167 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
168 break;
169 }
170
171 switch (sta->rx_nss) {
172 case 1:
173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
174 break;
175 case 2:
176 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
177 break;
178 case 3 ... 8:
179 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
180 break;
181 }
182
183 switch (sta->smps_mode) {
184 case IEEE80211_SMPS_AUTOMATIC:
185 case IEEE80211_SMPS_NUM_MODES:
186 WARN_ON(1);
187 break;
188 case IEEE80211_SMPS_STATIC:
189 /* override NSS */
190 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
192 break;
193 case IEEE80211_SMPS_DYNAMIC:
194 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
195 break;
196 case IEEE80211_SMPS_OFF:
197 /* nothing */
198 break;
199 }
200
201 if (sta->ht_cap.ht_supported) {
202 add_sta_cmd.station_flags_msk |=
203 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
204 STA_FLG_AGG_MPDU_DENS_MSK);
205
206 mpdu_dens = sta->ht_cap.ampdu_density;
207 }
208
209 if (sta->vht_cap.vht_supported) {
210 agg_size = sta->vht_cap.cap &
211 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
212 agg_size >>=
213 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
214 } else if (sta->ht_cap.ht_supported) {
215 agg_size = sta->ht_cap.ampdu_factor;
216 }
217
218 add_sta_cmd.station_flags |=
219 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
220 add_sta_cmd.station_flags |=
221 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
222 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
223 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
224
225 if (sta->wme) {
226 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
227
228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
229 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
230 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
231 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
232 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
233 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
234 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
235 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
236 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
237 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
238 }
239
240 status = ADD_STA_SUCCESS;
241 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
242 iwl_mvm_add_sta_cmd_size(mvm),
243 &add_sta_cmd, &status);
244 if (ret)
245 return ret;
246
247 switch (status & IWL_ADD_STA_STATUS_MASK) {
248 case ADD_STA_SUCCESS:
249 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
250 break;
251 default:
252 ret = -EIO;
253 IWL_ERR(mvm, "ADD_STA failed\n");
254 break;
255 }
256
257 return ret;
258 }
259
260 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
261 {
262 struct iwl_mvm_baid_data *data =
263 from_timer(data, t, session_timer);
264 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
265 struct iwl_mvm_baid_data *ba_data;
266 struct ieee80211_sta *sta;
267 struct iwl_mvm_sta *mvm_sta;
268 unsigned long timeout;
269
270 rcu_read_lock();
271
272 ba_data = rcu_dereference(*rcu_ptr);
273
274 if (WARN_ON(!ba_data))
275 goto unlock;
276
277 if (!ba_data->timeout)
278 goto unlock;
279
280 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
281 if (time_is_after_jiffies(timeout)) {
282 mod_timer(&ba_data->session_timer, timeout);
283 goto unlock;
284 }
285
286 /* Timer expired */
287 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
288
289 /*
290 * sta should be valid unless the following happens:
291 * The firmware asserts which triggers a reconfig flow, but
292 * the reconfig fails before we set the pointer to sta into
293 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
294 * A-MDPU and hence the timer continues to run. Then, the
295 * timer expires and sta is NULL.
296 */
297 if (!sta)
298 goto unlock;
299
300 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
301 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
302 sta->addr, ba_data->tid);
303 unlock:
304 rcu_read_unlock();
305 }
306
307 /* Disable aggregations for a bitmap of TIDs for a given station */
308 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
309 unsigned long disable_agg_tids,
310 bool remove_queue)
311 {
312 struct iwl_mvm_add_sta_cmd cmd = {};
313 struct ieee80211_sta *sta;
314 struct iwl_mvm_sta *mvmsta;
315 u32 status;
316 u8 sta_id;
317 int ret;
318
319 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
320 return -EINVAL;
321
322 spin_lock_bh(&mvm->queue_info_lock);
323 sta_id = mvm->queue_info[queue].ra_sta_id;
324 spin_unlock_bh(&mvm->queue_info_lock);
325
326 rcu_read_lock();
327
328 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
329
330 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
331 rcu_read_unlock();
332 return -EINVAL;
333 }
334
335 mvmsta = iwl_mvm_sta_from_mac80211(sta);
336
337 mvmsta->tid_disable_agg |= disable_agg_tids;
338
339 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
340 cmd.sta_id = mvmsta->sta_id;
341 cmd.add_modify = STA_MODE_MODIFY;
342 cmd.modify_mask = STA_MODIFY_QUEUES;
343 if (disable_agg_tids)
344 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
345 if (remove_queue)
346 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
347 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
348 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
349
350 rcu_read_unlock();
351
352 /* Notify FW of queue removal from the STA queues */
353 status = ADD_STA_SUCCESS;
354 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
355 iwl_mvm_add_sta_cmd_size(mvm),
356 &cmd, &status);
357
358 return ret;
359 }
360
361 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
362 {
363 struct ieee80211_sta *sta;
364 struct iwl_mvm_sta *mvmsta;
365 unsigned long tid_bitmap;
366 unsigned long agg_tids = 0;
367 u8 sta_id;
368 int tid;
369
370 lockdep_assert_held(&mvm->mutex);
371
372 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
373 return -EINVAL;
374
375 spin_lock_bh(&mvm->queue_info_lock);
376 sta_id = mvm->queue_info[queue].ra_sta_id;
377 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
378 spin_unlock_bh(&mvm->queue_info_lock);
379
380 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
381 lockdep_is_held(&mvm->mutex));
382
383 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
384 return -EINVAL;
385
386 mvmsta = iwl_mvm_sta_from_mac80211(sta);
387
388 spin_lock_bh(&mvmsta->lock);
389 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
390 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
391 agg_tids |= BIT(tid);
392 }
393 spin_unlock_bh(&mvmsta->lock);
394
395 return agg_tids;
396 }
397
398 /*
399 * Remove a queue from a station's resources.
400 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
401 * doesn't disable the queue
402 */
403 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
404 {
405 struct ieee80211_sta *sta;
406 struct iwl_mvm_sta *mvmsta;
407 unsigned long tid_bitmap;
408 unsigned long disable_agg_tids = 0;
409 u8 sta_id;
410 int tid;
411
412 lockdep_assert_held(&mvm->mutex);
413
414 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
415 return -EINVAL;
416
417 spin_lock_bh(&mvm->queue_info_lock);
418 sta_id = mvm->queue_info[queue].ra_sta_id;
419 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
420 spin_unlock_bh(&mvm->queue_info_lock);
421
422 rcu_read_lock();
423
424 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
425
426 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
427 rcu_read_unlock();
428 return 0;
429 }
430
431 mvmsta = iwl_mvm_sta_from_mac80211(sta);
432
433 spin_lock_bh(&mvmsta->lock);
434 /* Unmap MAC queues and TIDs from this queue */
435 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
436 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
437 disable_agg_tids |= BIT(tid);
438 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
439 }
440
441 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
442 spin_unlock_bh(&mvmsta->lock);
443
444 rcu_read_unlock();
445
446 return disable_agg_tids;
447 }
448
449 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
450 bool same_sta)
451 {
452 struct iwl_mvm_sta *mvmsta;
453 u8 txq_curr_ac, sta_id, tid;
454 unsigned long disable_agg_tids = 0;
455 int ret;
456
457 lockdep_assert_held(&mvm->mutex);
458
459 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
460 return -EINVAL;
461
462 spin_lock_bh(&mvm->queue_info_lock);
463 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
464 sta_id = mvm->queue_info[queue].ra_sta_id;
465 tid = mvm->queue_info[queue].txq_tid;
466 spin_unlock_bh(&mvm->queue_info_lock);
467
468 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
469 if (WARN_ON(!mvmsta))
470 return -EINVAL;
471
472 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
473 /* Disable the queue */
474 if (disable_agg_tids)
475 iwl_mvm_invalidate_sta_queue(mvm, queue,
476 disable_agg_tids, false);
477
478 ret = iwl_mvm_disable_txq(mvm, queue,
479 mvmsta->vif->hw_queue[txq_curr_ac],
480 tid, 0);
481 if (ret) {
482 /* Re-mark the inactive queue as inactive */
483 spin_lock_bh(&mvm->queue_info_lock);
484 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
485 spin_unlock_bh(&mvm->queue_info_lock);
486 IWL_ERR(mvm,
487 "Failed to free inactive queue %d (ret=%d)\n",
488 queue, ret);
489
490 return ret;
491 }
492
493 /* If TXQ is allocated to another STA, update removal in FW */
494 if (!same_sta)
495 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
496
497 return 0;
498 }
499
500 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
501 unsigned long tfd_queue_mask, u8 ac)
502 {
503 int queue = 0;
504 u8 ac_to_queue[IEEE80211_NUM_ACS];
505 int i;
506
507 lockdep_assert_held(&mvm->queue_info_lock);
508 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
509 return -EINVAL;
510
511 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
512
513 /* See what ACs the existing queues for this STA have */
514 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
515 /* Only DATA queues can be shared */
516 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
517 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
518 continue;
519
520 /* Don't try and take queues being reconfigured */
521 if (mvm->queue_info[queue].status ==
522 IWL_MVM_QUEUE_RECONFIGURING)
523 continue;
524
525 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
526 }
527
528 /*
529 * The queue to share is chosen only from DATA queues as follows (in
530 * descending priority):
531 * 1. An AC_BE queue
532 * 2. Same AC queue
533 * 3. Highest AC queue that is lower than new AC
534 * 4. Any existing AC (there always is at least 1 DATA queue)
535 */
536
537 /* Priority 1: An AC_BE queue */
538 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
539 queue = ac_to_queue[IEEE80211_AC_BE];
540 /* Priority 2: Same AC queue */
541 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
542 queue = ac_to_queue[ac];
543 /* Priority 3a: If new AC is VO and VI exists - use VI */
544 else if (ac == IEEE80211_AC_VO &&
545 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
546 queue = ac_to_queue[IEEE80211_AC_VI];
547 /* Priority 3b: No BE so only AC less than the new one is BK */
548 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
549 queue = ac_to_queue[IEEE80211_AC_BK];
550 /* Priority 4a: No BE nor BK - use VI if exists */
551 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
552 queue = ac_to_queue[IEEE80211_AC_VI];
553 /* Priority 4b: No BE, BK nor VI - use VO if exists */
554 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
555 queue = ac_to_queue[IEEE80211_AC_VO];
556
557 /* Make sure queue found (or not) is legal */
558 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
559 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
560 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
561 IWL_ERR(mvm, "No DATA queues available to share\n");
562 return -ENOSPC;
563 }
564
565 /* Make sure the queue isn't in the middle of being reconfigured */
566 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
567 IWL_ERR(mvm,
568 "TXQ %d is in the middle of re-config - try again\n",
569 queue);
570 return -EBUSY;
571 }
572
573 return queue;
574 }
575
576 /*
577 * If a given queue has a higher AC than the TID stream that is being compared
578 * to, the queue needs to be redirected to the lower AC. This function does that
579 * in such a case, otherwise - if no redirection required - it does nothing,
580 * unless the %force param is true.
581 */
582 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
583 int ac, int ssn, unsigned int wdg_timeout,
584 bool force)
585 {
586 struct iwl_scd_txq_cfg_cmd cmd = {
587 .scd_queue = queue,
588 .action = SCD_CFG_DISABLE_QUEUE,
589 };
590 bool shared_queue;
591 unsigned long mq;
592 int ret;
593
594 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
595 return -EINVAL;
596
597 /*
598 * If the AC is lower than current one - FIFO needs to be redirected to
599 * the lowest one of the streams in the queue. Check if this is needed
600 * here.
601 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
602 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
603 * we need to check if the numerical value of X is LARGER than of Y.
604 */
605 spin_lock_bh(&mvm->queue_info_lock);
606 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
607 spin_unlock_bh(&mvm->queue_info_lock);
608
609 IWL_DEBUG_TX_QUEUES(mvm,
610 "No redirection needed on TXQ #%d\n",
611 queue);
612 return 0;
613 }
614
615 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
616 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
617 cmd.tid = mvm->queue_info[queue].txq_tid;
618 mq = mvm->hw_queue_to_mac80211[queue];
619 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
620 spin_unlock_bh(&mvm->queue_info_lock);
621
622 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
623 queue, iwl_mvm_ac_to_tx_fifo[ac]);
624
625 /* Stop MAC queues and wait for this queue to empty */
626 iwl_mvm_stop_mac_queues(mvm, mq);
627 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
628 if (ret) {
629 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
630 queue);
631 ret = -EIO;
632 goto out;
633 }
634
635 /* Before redirecting the queue we need to de-activate it */
636 iwl_trans_txq_disable(mvm->trans, queue, false);
637 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
638 if (ret)
639 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
640 ret);
641
642 /* Make sure the SCD wrptr is correctly set before reconfiguring */
643 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
644
645 /* Update the TID "owner" of the queue */
646 spin_lock_bh(&mvm->queue_info_lock);
647 mvm->queue_info[queue].txq_tid = tid;
648 spin_unlock_bh(&mvm->queue_info_lock);
649
650 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
651
652 /* Redirect to lower AC */
653 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
654 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
655
656 /* Update AC marking of the queue */
657 spin_lock_bh(&mvm->queue_info_lock);
658 mvm->queue_info[queue].mac80211_ac = ac;
659 spin_unlock_bh(&mvm->queue_info_lock);
660
661 /*
662 * Mark queue as shared in transport if shared
663 * Note this has to be done after queue enablement because enablement
664 * can also set this value, and there is no indication there to shared
665 * queues
666 */
667 if (shared_queue)
668 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
669
670 out:
671 /* Continue using the MAC queues */
672 iwl_mvm_start_mac_queues(mvm, mq);
673
674 return ret;
675 }
676
677 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
678 struct ieee80211_sta *sta, u8 ac,
679 int tid)
680 {
681 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
682 unsigned int wdg_timeout =
683 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
684 u8 mac_queue = mvmsta->vif->hw_queue[ac];
685 int queue = -1;
686
687 lockdep_assert_held(&mvm->mutex);
688
689 IWL_DEBUG_TX_QUEUES(mvm,
690 "Allocating queue for sta %d on tid %d\n",
691 mvmsta->sta_id, tid);
692 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
693 wdg_timeout);
694 if (queue < 0)
695 return queue;
696
697 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
698
699 spin_lock_bh(&mvmsta->lock);
700 mvmsta->tid_data[tid].txq_id = queue;
701 mvmsta->tid_data[tid].is_tid_active = true;
702 spin_unlock_bh(&mvmsta->lock);
703
704 return 0;
705 }
706
707 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
708 struct ieee80211_sta *sta, u8 ac, int tid,
709 struct ieee80211_hdr *hdr)
710 {
711 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
712 struct iwl_trans_txq_scd_cfg cfg = {
713 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
714 .sta_id = mvmsta->sta_id,
715 .tid = tid,
716 .frame_limit = IWL_FRAME_LIMIT,
717 };
718 unsigned int wdg_timeout =
719 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
720 u8 mac_queue = mvmsta->vif->hw_queue[ac];
721 int queue = -1;
722 bool using_inactive_queue = false, same_sta = false;
723 unsigned long disable_agg_tids = 0;
724 enum iwl_mvm_agg_state queue_state;
725 bool shared_queue = false, inc_ssn;
726 int ssn;
727 unsigned long tfd_queue_mask;
728 int ret;
729
730 lockdep_assert_held(&mvm->mutex);
731
732 if (iwl_mvm_has_new_tx_api(mvm))
733 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
734
735 spin_lock_bh(&mvmsta->lock);
736 tfd_queue_mask = mvmsta->tfd_queue_msk;
737 spin_unlock_bh(&mvmsta->lock);
738
739 spin_lock_bh(&mvm->queue_info_lock);
740
741 /*
742 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
743 * exists
744 */
745 if (!ieee80211_is_data_qos(hdr->frame_control) ||
746 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
747 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
748 IWL_MVM_DQA_MIN_MGMT_QUEUE,
749 IWL_MVM_DQA_MAX_MGMT_QUEUE);
750 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
751 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
752 queue);
753
754 /* If no such queue is found, we'll use a DATA queue instead */
755 }
756
757 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
758 (mvm->queue_info[mvmsta->reserved_queue].status ==
759 IWL_MVM_QUEUE_RESERVED ||
760 mvm->queue_info[mvmsta->reserved_queue].status ==
761 IWL_MVM_QUEUE_INACTIVE)) {
762 queue = mvmsta->reserved_queue;
763 mvm->queue_info[queue].reserved = true;
764 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
765 }
766
767 if (queue < 0)
768 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
769 IWL_MVM_DQA_MIN_DATA_QUEUE,
770 IWL_MVM_DQA_MAX_DATA_QUEUE);
771
772 /*
773 * Check if this queue is already allocated but inactive.
774 * In such a case, we'll need to first free this queue before enabling
775 * it again, so we'll mark it as reserved to make sure no new traffic
776 * arrives on it
777 */
778 if (queue > 0 &&
779 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
780 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
781 using_inactive_queue = true;
782 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
783 IWL_DEBUG_TX_QUEUES(mvm,
784 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
785 queue, mvmsta->sta_id, tid);
786 }
787
788 /* No free queue - we'll have to share */
789 if (queue <= 0) {
790 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
791 if (queue > 0) {
792 shared_queue = true;
793 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
794 }
795 }
796
797 /*
798 * Mark TXQ as ready, even though it hasn't been fully configured yet,
799 * to make sure no one else takes it.
800 * This will allow avoiding re-acquiring the lock at the end of the
801 * configuration. On error we'll mark it back as free.
802 */
803 if ((queue > 0) && !shared_queue)
804 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
805
806 spin_unlock_bh(&mvm->queue_info_lock);
807
808 /* This shouldn't happen - out of queues */
809 if (WARN_ON(queue <= 0)) {
810 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
811 tid, cfg.sta_id);
812 return queue;
813 }
814
815 /*
816 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
817 * but for configuring the SCD to send A-MPDUs we need to mark the queue
818 * as aggregatable.
819 * Mark all DATA queues as allowing to be aggregated at some point
820 */
821 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
822 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
823
824 /*
825 * If this queue was previously inactive (idle) - we need to free it
826 * first
827 */
828 if (using_inactive_queue) {
829 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
830 if (ret)
831 return ret;
832 }
833
834 IWL_DEBUG_TX_QUEUES(mvm,
835 "Allocating %squeue #%d to sta %d on tid %d\n",
836 shared_queue ? "shared " : "", queue,
837 mvmsta->sta_id, tid);
838
839 if (shared_queue) {
840 /* Disable any open aggs on this queue */
841 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
842
843 if (disable_agg_tids) {
844 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
845 queue);
846 iwl_mvm_invalidate_sta_queue(mvm, queue,
847 disable_agg_tids, false);
848 }
849 }
850
851 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
852 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
853 ssn, &cfg, wdg_timeout);
854 if (inc_ssn) {
855 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
856 le16_add_cpu(&hdr->seq_ctrl, 0x10);
857 }
858
859 /*
860 * Mark queue as shared in transport if shared
861 * Note this has to be done after queue enablement because enablement
862 * can also set this value, and there is no indication there to shared
863 * queues
864 */
865 if (shared_queue)
866 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
867
868 spin_lock_bh(&mvmsta->lock);
869 /*
870 * This looks racy, but it is not. We have only one packet for
871 * this ra/tid in our Tx path since we stop the Qdisc when we
872 * need to allocate a new TFD queue.
873 */
874 if (inc_ssn)
875 mvmsta->tid_data[tid].seq_number += 0x10;
876 mvmsta->tid_data[tid].txq_id = queue;
877 mvmsta->tid_data[tid].is_tid_active = true;
878 mvmsta->tfd_queue_msk |= BIT(queue);
879 queue_state = mvmsta->tid_data[tid].state;
880
881 if (mvmsta->reserved_queue == queue)
882 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
883 spin_unlock_bh(&mvmsta->lock);
884
885 if (!shared_queue) {
886 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
887 if (ret)
888 goto out_err;
889
890 /* If we need to re-enable aggregations... */
891 if (queue_state == IWL_AGG_ON) {
892 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
893 if (ret)
894 goto out_err;
895 }
896 } else {
897 /* Redirect queue, if needed */
898 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
899 wdg_timeout, false);
900 if (ret)
901 goto out_err;
902 }
903
904 return 0;
905
906 out_err:
907 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
908
909 return ret;
910 }
911
912 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
913 {
914 struct iwl_scd_txq_cfg_cmd cmd = {
915 .scd_queue = queue,
916 .action = SCD_CFG_UPDATE_QUEUE_TID,
917 };
918 int tid;
919 unsigned long tid_bitmap;
920 int ret;
921
922 lockdep_assert_held(&mvm->mutex);
923
924 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
925 return;
926
927 spin_lock_bh(&mvm->queue_info_lock);
928 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
929 spin_unlock_bh(&mvm->queue_info_lock);
930
931 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
932 return;
933
934 /* Find any TID for queue */
935 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
936 cmd.tid = tid;
937 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
938
939 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
940 if (ret) {
941 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
942 queue, ret);
943 return;
944 }
945
946 spin_lock_bh(&mvm->queue_info_lock);
947 mvm->queue_info[queue].txq_tid = tid;
948 spin_unlock_bh(&mvm->queue_info_lock);
949 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
950 queue, tid);
951 }
952
953 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
954 {
955 struct ieee80211_sta *sta;
956 struct iwl_mvm_sta *mvmsta;
957 u8 sta_id;
958 int tid = -1;
959 unsigned long tid_bitmap;
960 unsigned int wdg_timeout;
961 int ssn;
962 int ret = true;
963
964 /* queue sharing is disabled on new TX path */
965 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
966 return;
967
968 lockdep_assert_held(&mvm->mutex);
969
970 spin_lock_bh(&mvm->queue_info_lock);
971 sta_id = mvm->queue_info[queue].ra_sta_id;
972 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
973 spin_unlock_bh(&mvm->queue_info_lock);
974
975 /* Find TID for queue, and make sure it is the only one on the queue */
976 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
977 if (tid_bitmap != BIT(tid)) {
978 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
979 queue, tid_bitmap);
980 return;
981 }
982
983 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
984 tid);
985
986 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
987 lockdep_is_held(&mvm->mutex));
988
989 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
990 return;
991
992 mvmsta = iwl_mvm_sta_from_mac80211(sta);
993 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
994
995 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
996
997 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
998 tid_to_mac80211_ac[tid], ssn,
999 wdg_timeout, true);
1000 if (ret) {
1001 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1002 return;
1003 }
1004
1005 /* If aggs should be turned back on - do it */
1006 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1007 struct iwl_mvm_add_sta_cmd cmd = {0};
1008
1009 mvmsta->tid_disable_agg &= ~BIT(tid);
1010
1011 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1012 cmd.sta_id = mvmsta->sta_id;
1013 cmd.add_modify = STA_MODE_MODIFY;
1014 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1015 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1016 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1017
1018 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1019 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1020 if (!ret) {
1021 IWL_DEBUG_TX_QUEUES(mvm,
1022 "TXQ #%d is now aggregated again\n",
1023 queue);
1024
1025 /* Mark queue intenally as aggregating again */
1026 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1027 }
1028 }
1029
1030 spin_lock_bh(&mvm->queue_info_lock);
1031 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1032 spin_unlock_bh(&mvm->queue_info_lock);
1033 }
1034
1035 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1036 {
1037 if (tid == IWL_MAX_TID_COUNT)
1038 return IEEE80211_AC_VO; /* MGMT */
1039
1040 return tid_to_mac80211_ac[tid];
1041 }
1042
1043 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1044 struct ieee80211_sta *sta, int tid)
1045 {
1046 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1047 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1048 struct sk_buff *skb;
1049 struct ieee80211_hdr *hdr;
1050 struct sk_buff_head deferred_tx;
1051 u8 mac_queue;
1052 bool no_queue = false; /* Marks if there is a problem with the queue */
1053 u8 ac;
1054
1055 lockdep_assert_held(&mvm->mutex);
1056
1057 skb = skb_peek(&tid_data->deferred_tx_frames);
1058 if (!skb)
1059 return;
1060 hdr = (void *)skb->data;
1061
1062 ac = iwl_mvm_tid_to_ac_queue(tid);
1063 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1064
1065 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1066 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1067 IWL_ERR(mvm,
1068 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1069 mvmsta->sta_id, tid);
1070
1071 /*
1072 * Mark queue as problematic so later the deferred traffic is
1073 * freed, as we can do nothing with it
1074 */
1075 no_queue = true;
1076 }
1077
1078 __skb_queue_head_init(&deferred_tx);
1079
1080 /* Disable bottom-halves when entering TX path */
1081 local_bh_disable();
1082 spin_lock(&mvmsta->lock);
1083 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1084 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1085 spin_unlock(&mvmsta->lock);
1086
1087 while ((skb = __skb_dequeue(&deferred_tx)))
1088 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1089 ieee80211_free_txskb(mvm->hw, skb);
1090 local_bh_enable();
1091
1092 /* Wake queue */
1093 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1094 }
1095
1096 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1097 {
1098 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1099 add_stream_wk);
1100 struct ieee80211_sta *sta;
1101 struct iwl_mvm_sta *mvmsta;
1102 unsigned long deferred_tid_traffic;
1103 int queue, sta_id, tid;
1104
1105 /* Check inactivity of queues */
1106 iwl_mvm_inactivity_check(mvm);
1107
1108 mutex_lock(&mvm->mutex);
1109
1110 /* No queue reconfiguration in TVQM mode */
1111 if (iwl_mvm_has_new_tx_api(mvm))
1112 goto alloc_queues;
1113
1114 /* Reconfigure queues requiring reconfiguation */
1115 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1116 bool reconfig;
1117 bool change_owner;
1118
1119 spin_lock_bh(&mvm->queue_info_lock);
1120 reconfig = (mvm->queue_info[queue].status ==
1121 IWL_MVM_QUEUE_RECONFIGURING);
1122
1123 /*
1124 * We need to take into account a situation in which a TXQ was
1125 * allocated to TID x, and then turned shared by adding TIDs y
1126 * and z. If TID x becomes inactive and is removed from the TXQ,
1127 * ownership must be given to one of the remaining TIDs.
1128 * This is mainly because if TID x continues - a new queue can't
1129 * be allocated for it as long as it is an owner of another TXQ.
1130 */
1131 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1132 BIT(mvm->queue_info[queue].txq_tid)) &&
1133 (mvm->queue_info[queue].status ==
1134 IWL_MVM_QUEUE_SHARED);
1135 spin_unlock_bh(&mvm->queue_info_lock);
1136
1137 if (reconfig)
1138 iwl_mvm_unshare_queue(mvm, queue);
1139 else if (change_owner)
1140 iwl_mvm_change_queue_owner(mvm, queue);
1141 }
1142
1143 alloc_queues:
1144 /* Go over all stations with deferred traffic */
1145 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1146 IWL_MVM_STATION_COUNT) {
1147 clear_bit(sta_id, mvm->sta_deferred_frames);
1148 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1149 lockdep_is_held(&mvm->mutex));
1150 if (IS_ERR_OR_NULL(sta))
1151 continue;
1152
1153 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1154 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1155
1156 for_each_set_bit(tid, &deferred_tid_traffic,
1157 IWL_MAX_TID_COUNT + 1)
1158 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1159 }
1160
1161 mutex_unlock(&mvm->mutex);
1162 }
1163
1164 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1165 struct ieee80211_sta *sta,
1166 enum nl80211_iftype vif_type)
1167 {
1168 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1169 int queue;
1170 bool using_inactive_queue = false, same_sta = false;
1171
1172 /* queue reserving is disabled on new TX path */
1173 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1174 return 0;
1175
1176 /*
1177 * Check for inactive queues, so we don't reach a situation where we
1178 * can't add a STA due to a shortage in queues that doesn't really exist
1179 */
1180 iwl_mvm_inactivity_check(mvm);
1181
1182 spin_lock_bh(&mvm->queue_info_lock);
1183
1184 /* Make sure we have free resources for this STA */
1185 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1186 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1187 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1188 IWL_MVM_QUEUE_FREE))
1189 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1190 else
1191 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1192 IWL_MVM_DQA_MIN_DATA_QUEUE,
1193 IWL_MVM_DQA_MAX_DATA_QUEUE);
1194 if (queue < 0) {
1195 spin_unlock_bh(&mvm->queue_info_lock);
1196 IWL_ERR(mvm, "No available queues for new station\n");
1197 return -ENOSPC;
1198 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1199 /*
1200 * If this queue is already allocated but inactive we'll need to
1201 * first free this queue before enabling it again, we'll mark
1202 * it as reserved to make sure no new traffic arrives on it
1203 */
1204 using_inactive_queue = true;
1205 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1206 }
1207 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1208
1209 spin_unlock_bh(&mvm->queue_info_lock);
1210
1211 mvmsta->reserved_queue = queue;
1212
1213 if (using_inactive_queue)
1214 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1215
1216 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1217 queue, mvmsta->sta_id);
1218
1219 return 0;
1220 }
1221
1222 /*
1223 * In DQA mode, after a HW restart the queues should be allocated as before, in
1224 * order to avoid race conditions when there are shared queues. This function
1225 * does the re-mapping and queue allocation.
1226 *
1227 * Note that re-enabling aggregations isn't done in this function.
1228 */
1229 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1230 struct iwl_mvm_sta *mvm_sta)
1231 {
1232 unsigned int wdg_timeout =
1233 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1234 int i;
1235 struct iwl_trans_txq_scd_cfg cfg = {
1236 .sta_id = mvm_sta->sta_id,
1237 .frame_limit = IWL_FRAME_LIMIT,
1238 };
1239
1240 /* Make sure reserved queue is still marked as such (if allocated) */
1241 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1242 mvm->queue_info[mvm_sta->reserved_queue].status =
1243 IWL_MVM_QUEUE_RESERVED;
1244
1245 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1246 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1247 int txq_id = tid_data->txq_id;
1248 int ac;
1249 u8 mac_queue;
1250
1251 if (txq_id == IWL_MVM_INVALID_QUEUE)
1252 continue;
1253
1254 skb_queue_head_init(&tid_data->deferred_tx_frames);
1255
1256 ac = tid_to_mac80211_ac[i];
1257 mac_queue = mvm_sta->vif->hw_queue[ac];
1258
1259 if (iwl_mvm_has_new_tx_api(mvm)) {
1260 IWL_DEBUG_TX_QUEUES(mvm,
1261 "Re-mapping sta %d tid %d\n",
1262 mvm_sta->sta_id, i);
1263 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1264 mvm_sta->sta_id,
1265 i, wdg_timeout);
1266 tid_data->txq_id = txq_id;
1267
1268 /*
1269 * Since we don't set the seq number after reset, and HW
1270 * sets it now, FW reset will cause the seq num to start
1271 * at 0 again, so driver will need to update it
1272 * internally as well, so it keeps in sync with real val
1273 */
1274 tid_data->seq_number = 0;
1275 } else {
1276 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1277
1278 cfg.tid = i;
1279 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1280 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1281 txq_id ==
1282 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1283
1284 IWL_DEBUG_TX_QUEUES(mvm,
1285 "Re-mapping sta %d tid %d to queue %d\n",
1286 mvm_sta->sta_id, i, txq_id);
1287
1288 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1289 wdg_timeout);
1290 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1291 }
1292 }
1293 }
1294
1295 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1296 struct iwl_mvm_int_sta *sta,
1297 const u8 *addr,
1298 u16 mac_id, u16 color)
1299 {
1300 struct iwl_mvm_add_sta_cmd cmd;
1301 int ret;
1302 u32 status = ADD_STA_SUCCESS;
1303
1304 lockdep_assert_held(&mvm->mutex);
1305
1306 memset(&cmd, 0, sizeof(cmd));
1307 cmd.sta_id = sta->sta_id;
1308 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1309 color));
1310 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1311 cmd.station_type = sta->type;
1312
1313 if (!iwl_mvm_has_new_tx_api(mvm))
1314 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1315 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1316
1317 if (addr)
1318 memcpy(cmd.addr, addr, ETH_ALEN);
1319
1320 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1321 iwl_mvm_add_sta_cmd_size(mvm),
1322 &cmd, &status);
1323 if (ret)
1324 return ret;
1325
1326 switch (status & IWL_ADD_STA_STATUS_MASK) {
1327 case ADD_STA_SUCCESS:
1328 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1329 return 0;
1330 default:
1331 ret = -EIO;
1332 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1333 status);
1334 break;
1335 }
1336 return ret;
1337 }
1338
1339 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1340 struct ieee80211_vif *vif,
1341 struct ieee80211_sta *sta)
1342 {
1343 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1344 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1345 struct iwl_mvm_rxq_dup_data *dup_data;
1346 int i, ret, sta_id;
1347 bool sta_update = false;
1348 unsigned int sta_flags = 0;
1349
1350 lockdep_assert_held(&mvm->mutex);
1351
1352 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1353 sta_id = iwl_mvm_find_free_sta_id(mvm,
1354 ieee80211_vif_type_p2p(vif));
1355 else
1356 sta_id = mvm_sta->sta_id;
1357
1358 if (sta_id == IWL_MVM_INVALID_STA)
1359 return -ENOSPC;
1360
1361 spin_lock_init(&mvm_sta->lock);
1362
1363 /* if this is a HW restart re-alloc existing queues */
1364 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1365 struct iwl_mvm_int_sta tmp_sta = {
1366 .sta_id = sta_id,
1367 .type = mvm_sta->sta_type,
1368 };
1369
1370 /*
1371 * First add an empty station since allocating
1372 * a queue requires a valid station
1373 */
1374 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1375 mvmvif->id, mvmvif->color);
1376 if (ret)
1377 goto err;
1378
1379 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1380 sta_update = true;
1381 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1382 goto update_fw;
1383 }
1384
1385 mvm_sta->sta_id = sta_id;
1386 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1387 mvmvif->color);
1388 mvm_sta->vif = vif;
1389 if (!mvm->trans->cfg->gen2)
1390 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1391 else
1392 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1393 mvm_sta->tx_protection = 0;
1394 mvm_sta->tt_tx_protection = false;
1395 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1396
1397 /* HW restart, don't assume the memory has been zeroed */
1398 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1399 mvm_sta->tfd_queue_msk = 0;
1400
1401 /* for HW restart - reset everything but the sequence number */
1402 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1403 u16 seq = mvm_sta->tid_data[i].seq_number;
1404 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1405 mvm_sta->tid_data[i].seq_number = seq;
1406
1407 /*
1408 * Mark all queues for this STA as unallocated and defer TX
1409 * frames until the queue is allocated
1410 */
1411 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1412 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1413 }
1414 mvm_sta->deferred_traffic_tid_map = 0;
1415 mvm_sta->agg_tids = 0;
1416
1417 if (iwl_mvm_has_new_rx_api(mvm) &&
1418 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1419 int q;
1420
1421 dup_data = kcalloc(mvm->trans->num_rx_queues,
1422 sizeof(*dup_data), GFP_KERNEL);
1423 if (!dup_data)
1424 return -ENOMEM;
1425 /*
1426 * Initialize all the last_seq values to 0xffff which can never
1427 * compare equal to the frame's seq_ctrl in the check in
1428 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1429 * number and fragmented packets don't reach that function.
1430 *
1431 * This thus allows receiving a packet with seqno 0 and the
1432 * retry bit set as the very first packet on a new TID.
1433 */
1434 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1435 memset(dup_data[q].last_seq, 0xff,
1436 sizeof(dup_data[q].last_seq));
1437 mvm_sta->dup_data = dup_data;
1438 }
1439
1440 if (!iwl_mvm_has_new_tx_api(mvm)) {
1441 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1442 ieee80211_vif_type_p2p(vif));
1443 if (ret)
1444 goto err;
1445 }
1446
1447 /*
1448 * if rs is registered with mac80211, then "add station" will be handled
1449 * via the corresponding ops, otherwise need to notify rate scaling here
1450 */
1451 if (iwl_mvm_has_tlc_offload(mvm))
1452 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1453
1454 update_fw:
1455 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1456 if (ret)
1457 goto err;
1458
1459 if (vif->type == NL80211_IFTYPE_STATION) {
1460 if (!sta->tdls) {
1461 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1462 mvmvif->ap_sta_id = sta_id;
1463 } else {
1464 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1465 }
1466 }
1467
1468 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1469
1470 return 0;
1471
1472 err:
1473 return ret;
1474 }
1475
1476 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1477 bool drain)
1478 {
1479 struct iwl_mvm_add_sta_cmd cmd = {};
1480 int ret;
1481 u32 status;
1482
1483 lockdep_assert_held(&mvm->mutex);
1484
1485 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1486 cmd.sta_id = mvmsta->sta_id;
1487 cmd.add_modify = STA_MODE_MODIFY;
1488 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1489 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1490
1491 status = ADD_STA_SUCCESS;
1492 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1493 iwl_mvm_add_sta_cmd_size(mvm),
1494 &cmd, &status);
1495 if (ret)
1496 return ret;
1497
1498 switch (status & IWL_ADD_STA_STATUS_MASK) {
1499 case ADD_STA_SUCCESS:
1500 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1501 mvmsta->sta_id);
1502 break;
1503 default:
1504 ret = -EIO;
1505 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1506 mvmsta->sta_id);
1507 break;
1508 }
1509
1510 return ret;
1511 }
1512
1513 /*
1514 * Remove a station from the FW table. Before sending the command to remove
1515 * the station validate that the station is indeed known to the driver (sanity
1516 * only).
1517 */
1518 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1519 {
1520 struct ieee80211_sta *sta;
1521 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1522 .sta_id = sta_id,
1523 };
1524 int ret;
1525
1526 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1527 lockdep_is_held(&mvm->mutex));
1528
1529 /* Note: internal stations are marked as error values */
1530 if (!sta) {
1531 IWL_ERR(mvm, "Invalid station id\n");
1532 return -EINVAL;
1533 }
1534
1535 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1536 sizeof(rm_sta_cmd), &rm_sta_cmd);
1537 if (ret) {
1538 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1539 return ret;
1540 }
1541
1542 return 0;
1543 }
1544
1545 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1546 struct ieee80211_vif *vif,
1547 struct iwl_mvm_sta *mvm_sta)
1548 {
1549 int ac;
1550 int i;
1551
1552 lockdep_assert_held(&mvm->mutex);
1553
1554 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1555 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1556 continue;
1557
1558 ac = iwl_mvm_tid_to_ac_queue(i);
1559 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1560 vif->hw_queue[ac], i, 0);
1561 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1562 }
1563 }
1564
1565 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1566 struct iwl_mvm_sta *mvm_sta)
1567 {
1568 int i;
1569
1570 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1571 u16 txq_id;
1572 int ret;
1573
1574 spin_lock_bh(&mvm_sta->lock);
1575 txq_id = mvm_sta->tid_data[i].txq_id;
1576 spin_unlock_bh(&mvm_sta->lock);
1577
1578 if (txq_id == IWL_MVM_INVALID_QUEUE)
1579 continue;
1580
1581 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1582 if (ret)
1583 return ret;
1584 }
1585
1586 return 0;
1587 }
1588
1589 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1590 struct ieee80211_vif *vif,
1591 struct ieee80211_sta *sta)
1592 {
1593 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1594 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1595 u8 sta_id = mvm_sta->sta_id;
1596 int ret;
1597
1598 lockdep_assert_held(&mvm->mutex);
1599
1600 if (iwl_mvm_has_new_rx_api(mvm))
1601 kfree(mvm_sta->dup_data);
1602
1603 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1604 if (ret)
1605 return ret;
1606
1607 /* flush its queues here since we are freeing mvm_sta */
1608 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1609 if (ret)
1610 return ret;
1611 if (iwl_mvm_has_new_tx_api(mvm)) {
1612 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1613 } else {
1614 u32 q_mask = mvm_sta->tfd_queue_msk;
1615
1616 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1617 q_mask);
1618 }
1619 if (ret)
1620 return ret;
1621
1622 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1623
1624 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1625
1626 /* If there is a TXQ still marked as reserved - free it */
1627 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1628 u8 reserved_txq = mvm_sta->reserved_queue;
1629 enum iwl_mvm_queue_status *status;
1630
1631 /*
1632 * If no traffic has gone through the reserved TXQ - it
1633 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1634 * should be manually marked as free again
1635 */
1636 spin_lock_bh(&mvm->queue_info_lock);
1637 status = &mvm->queue_info[reserved_txq].status;
1638 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1639 (*status != IWL_MVM_QUEUE_FREE),
1640 "sta_id %d reserved txq %d status %d",
1641 sta_id, reserved_txq, *status)) {
1642 spin_unlock_bh(&mvm->queue_info_lock);
1643 return -EINVAL;
1644 }
1645
1646 *status = IWL_MVM_QUEUE_FREE;
1647 spin_unlock_bh(&mvm->queue_info_lock);
1648 }
1649
1650 if (vif->type == NL80211_IFTYPE_STATION &&
1651 mvmvif->ap_sta_id == sta_id) {
1652 /* if associated - we can't remove the AP STA now */
1653 if (vif->bss_conf.assoc)
1654 return ret;
1655
1656 /* unassoc - go ahead - remove the AP STA now */
1657 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1658
1659 /* clear d0i3_ap_sta_id if no longer relevant */
1660 if (mvm->d0i3_ap_sta_id == sta_id)
1661 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1662 }
1663
1664 /*
1665 * This shouldn't happen - the TDLS channel switch should be canceled
1666 * before the STA is removed.
1667 */
1668 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1669 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1670 cancel_delayed_work(&mvm->tdls_cs.dwork);
1671 }
1672
1673 /*
1674 * Make sure that the tx response code sees the station as -EBUSY and
1675 * calls the drain worker.
1676 */
1677 spin_lock_bh(&mvm_sta->lock);
1678 spin_unlock_bh(&mvm_sta->lock);
1679
1680 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1681 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1682
1683 return ret;
1684 }
1685
1686 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1687 struct ieee80211_vif *vif,
1688 u8 sta_id)
1689 {
1690 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1691
1692 lockdep_assert_held(&mvm->mutex);
1693
1694 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1695 return ret;
1696 }
1697
1698 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1699 struct iwl_mvm_int_sta *sta,
1700 u32 qmask, enum nl80211_iftype iftype,
1701 enum iwl_sta_type type)
1702 {
1703 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1704 sta->sta_id == IWL_MVM_INVALID_STA) {
1705 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1706 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1707 return -ENOSPC;
1708 }
1709
1710 sta->tfd_queue_msk = qmask;
1711 sta->type = type;
1712
1713 /* put a non-NULL value so iterating over the stations won't stop */
1714 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1715 return 0;
1716 }
1717
1718 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1719 {
1720 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1721 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1722 sta->sta_id = IWL_MVM_INVALID_STA;
1723 }
1724
1725 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
1726 u8 sta_id, u8 fifo)
1727 {
1728 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1729 mvm->cfg->base_params->wd_timeout :
1730 IWL_WATCHDOG_DISABLED;
1731
1732 if (iwl_mvm_has_new_tx_api(mvm)) {
1733 int tvqm_queue =
1734 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
1735 IWL_MAX_TID_COUNT,
1736 wdg_timeout);
1737 *queue = tvqm_queue;
1738 } else {
1739 struct iwl_trans_txq_scd_cfg cfg = {
1740 .fifo = fifo,
1741 .sta_id = sta_id,
1742 .tid = IWL_MAX_TID_COUNT,
1743 .aggregate = false,
1744 .frame_limit = IWL_FRAME_LIMIT,
1745 };
1746
1747 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
1748 }
1749 }
1750
1751 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1752 {
1753 int ret;
1754
1755 lockdep_assert_held(&mvm->mutex);
1756
1757 /* Allocate aux station and assign to it the aux queue */
1758 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1759 NL80211_IFTYPE_UNSPECIFIED,
1760 IWL_STA_AUX_ACTIVITY);
1761 if (ret)
1762 return ret;
1763
1764 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1765 if (!iwl_mvm_has_new_tx_api(mvm))
1766 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1767 mvm->aux_sta.sta_id,
1768 IWL_MVM_TX_FIFO_MCAST);
1769
1770 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1771 MAC_INDEX_AUX, 0);
1772 if (ret) {
1773 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1774 return ret;
1775 }
1776
1777 /*
1778 * For 22000 firmware and on we cannot add queue to a station unknown
1779 * to firmware so enable queue here - after the station was added
1780 */
1781 if (iwl_mvm_has_new_tx_api(mvm))
1782 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1783 mvm->aux_sta.sta_id,
1784 IWL_MVM_TX_FIFO_MCAST);
1785
1786 return 0;
1787 }
1788
1789 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1790 {
1791 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1792 int ret;
1793
1794 lockdep_assert_held(&mvm->mutex);
1795
1796 /* Map snif queue to fifo - must happen before adding snif station */
1797 if (!iwl_mvm_has_new_tx_api(mvm))
1798 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1799 mvm->snif_sta.sta_id,
1800 IWL_MVM_TX_FIFO_BE);
1801
1802 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1803 mvmvif->id, 0);
1804 if (ret)
1805 return ret;
1806
1807 /*
1808 * For 22000 firmware and on we cannot add queue to a station unknown
1809 * to firmware so enable queue here - after the station was added
1810 */
1811 if (iwl_mvm_has_new_tx_api(mvm))
1812 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1813 mvm->snif_sta.sta_id,
1814 IWL_MVM_TX_FIFO_BE);
1815
1816 return 0;
1817 }
1818
1819 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1820 {
1821 int ret;
1822
1823 lockdep_assert_held(&mvm->mutex);
1824
1825 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
1826 IWL_MAX_TID_COUNT, 0);
1827 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1828 if (ret)
1829 IWL_WARN(mvm, "Failed sending remove station\n");
1830
1831 return ret;
1832 }
1833
1834 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1835 {
1836 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1837 }
1838
1839 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1840 {
1841 lockdep_assert_held(&mvm->mutex);
1842
1843 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1844 }
1845
1846 /*
1847 * Send the add station command for the vif's broadcast station.
1848 * Assumes that the station was already allocated.
1849 *
1850 * @mvm: the mvm component
1851 * @vif: the interface to which the broadcast station is added
1852 * @bsta: the broadcast station to add.
1853 */
1854 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1855 {
1856 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1857 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1858 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1859 const u8 *baddr = _baddr;
1860 int queue;
1861 int ret;
1862 unsigned int wdg_timeout =
1863 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1864 struct iwl_trans_txq_scd_cfg cfg = {
1865 .fifo = IWL_MVM_TX_FIFO_VO,
1866 .sta_id = mvmvif->bcast_sta.sta_id,
1867 .tid = IWL_MAX_TID_COUNT,
1868 .aggregate = false,
1869 .frame_limit = IWL_FRAME_LIMIT,
1870 };
1871
1872 lockdep_assert_held(&mvm->mutex);
1873
1874 if (!iwl_mvm_has_new_tx_api(mvm)) {
1875 if (vif->type == NL80211_IFTYPE_AP ||
1876 vif->type == NL80211_IFTYPE_ADHOC)
1877 queue = mvm->probe_queue;
1878 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1879 queue = mvm->p2p_dev_queue;
1880 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1881 return -EINVAL;
1882
1883 bsta->tfd_queue_msk |= BIT(queue);
1884
1885 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1886 &cfg, wdg_timeout);
1887 }
1888
1889 if (vif->type == NL80211_IFTYPE_ADHOC)
1890 baddr = vif->bss_conf.bssid;
1891
1892 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1893 return -ENOSPC;
1894
1895 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1896 mvmvif->id, mvmvif->color);
1897 if (ret)
1898 return ret;
1899
1900 /*
1901 * For 22000 firmware and on we cannot add queue to a station unknown
1902 * to firmware so enable queue here - after the station was added
1903 */
1904 if (iwl_mvm_has_new_tx_api(mvm)) {
1905 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1906 bsta->sta_id,
1907 IWL_MAX_TID_COUNT,
1908 wdg_timeout);
1909
1910 if (vif->type == NL80211_IFTYPE_AP ||
1911 vif->type == NL80211_IFTYPE_ADHOC)
1912 mvm->probe_queue = queue;
1913 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1914 mvm->p2p_dev_queue = queue;
1915 }
1916
1917 return 0;
1918 }
1919
1920 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1921 struct ieee80211_vif *vif)
1922 {
1923 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1924 int queue;
1925
1926 lockdep_assert_held(&mvm->mutex);
1927
1928 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1929
1930 switch (vif->type) {
1931 case NL80211_IFTYPE_AP:
1932 case NL80211_IFTYPE_ADHOC:
1933 queue = mvm->probe_queue;
1934 break;
1935 case NL80211_IFTYPE_P2P_DEVICE:
1936 queue = mvm->p2p_dev_queue;
1937 break;
1938 default:
1939 WARN(1, "Can't free bcast queue on vif type %d\n",
1940 vif->type);
1941 return;
1942 }
1943
1944 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1945 if (iwl_mvm_has_new_tx_api(mvm))
1946 return;
1947
1948 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1949 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1950 }
1951
1952 /* Send the FW a request to remove the station from it's internal data
1953 * structures, but DO NOT remove the entry from the local data structures. */
1954 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1955 {
1956 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1957 int ret;
1958
1959 lockdep_assert_held(&mvm->mutex);
1960
1961 iwl_mvm_free_bcast_sta_queues(mvm, vif);
1962
1963 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1964 if (ret)
1965 IWL_WARN(mvm, "Failed sending remove station\n");
1966 return ret;
1967 }
1968
1969 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1970 {
1971 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1972
1973 lockdep_assert_held(&mvm->mutex);
1974
1975 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1976 ieee80211_vif_type_p2p(vif),
1977 IWL_STA_GENERAL_PURPOSE);
1978 }
1979
1980 /* Allocate a new station entry for the broadcast station to the given vif,
1981 * and send it to the FW.
1982 * Note that each P2P mac should have its own broadcast station.
1983 *
1984 * @mvm: the mvm component
1985 * @vif: the interface to which the broadcast station is added
1986 * @bsta: the broadcast station to add. */
1987 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1988 {
1989 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1990 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1991 int ret;
1992
1993 lockdep_assert_held(&mvm->mutex);
1994
1995 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1996 if (ret)
1997 return ret;
1998
1999 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2000
2001 if (ret)
2002 iwl_mvm_dealloc_int_sta(mvm, bsta);
2003
2004 return ret;
2005 }
2006
2007 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2008 {
2009 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2010
2011 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2012 }
2013
2014 /*
2015 * Send the FW a request to remove the station from it's internal data
2016 * structures, and in addition remove it from the local data structure.
2017 */
2018 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2019 {
2020 int ret;
2021
2022 lockdep_assert_held(&mvm->mutex);
2023
2024 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2025
2026 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2027
2028 return ret;
2029 }
2030
2031 /*
2032 * Allocate a new station entry for the multicast station to the given vif,
2033 * and send it to the FW.
2034 * Note that each AP/GO mac should have its own multicast station.
2035 *
2036 * @mvm: the mvm component
2037 * @vif: the interface to which the multicast station is added
2038 */
2039 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2040 {
2041 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2042 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2043 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2044 const u8 *maddr = _maddr;
2045 struct iwl_trans_txq_scd_cfg cfg = {
2046 .fifo = IWL_MVM_TX_FIFO_MCAST,
2047 .sta_id = msta->sta_id,
2048 .tid = 0,
2049 .aggregate = false,
2050 .frame_limit = IWL_FRAME_LIMIT,
2051 };
2052 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2053 int ret;
2054
2055 lockdep_assert_held(&mvm->mutex);
2056
2057 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2058 vif->type != NL80211_IFTYPE_ADHOC))
2059 return -ENOTSUPP;
2060
2061 /*
2062 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2063 * invalid, so make sure we use the queue we want.
2064 * Note that this is done here as we want to avoid making DQA
2065 * changes in mac80211 layer.
2066 */
2067 if (vif->type == NL80211_IFTYPE_ADHOC) {
2068 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2069 mvmvif->cab_queue = vif->cab_queue;
2070 }
2071
2072 /*
2073 * While in previous FWs we had to exclude cab queue from TFD queue
2074 * mask, now it is needed as any other queue.
2075 */
2076 if (!iwl_mvm_has_new_tx_api(mvm) &&
2077 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2078 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2079 &cfg, timeout);
2080 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2081 }
2082 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2083 mvmvif->id, mvmvif->color);
2084 if (ret) {
2085 iwl_mvm_dealloc_int_sta(mvm, msta);
2086 return ret;
2087 }
2088
2089 /*
2090 * Enable cab queue after the ADD_STA command is sent.
2091 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2092 * command with unknown station id, and for FW that doesn't support
2093 * station API since the cab queue is not included in the
2094 * tfd_queue_mask.
2095 */
2096 if (iwl_mvm_has_new_tx_api(mvm)) {
2097 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2098 msta->sta_id,
2099 0,
2100 timeout);
2101 mvmvif->cab_queue = queue;
2102 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2103 IWL_UCODE_TLV_API_STA_TYPE))
2104 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2105 &cfg, timeout);
2106
2107 if (mvmvif->ap_wep_key) {
2108 u8 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2109
2110 if (key_offset == STA_KEY_IDX_INVALID)
2111 return -ENOSPC;
2112
2113 ret = iwl_mvm_send_sta_key(mvm, mvmvif->mcast_sta.sta_id,
2114 mvmvif->ap_wep_key, 1, 0, NULL, 0,
2115 key_offset, 0);
2116 if (ret)
2117 return ret;
2118 }
2119
2120 return 0;
2121 }
2122
2123 /*
2124 * Send the FW a request to remove the station from it's internal data
2125 * structures, and in addition remove it from the local data structure.
2126 */
2127 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2128 {
2129 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2130 int ret;
2131
2132 lockdep_assert_held(&mvm->mutex);
2133
2134 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2135
2136 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2137 0, 0);
2138
2139 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2140 if (ret)
2141 IWL_WARN(mvm, "Failed sending remove station\n");
2142
2143 return ret;
2144 }
2145
2146 #define IWL_MAX_RX_BA_SESSIONS 16
2147
2148 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2149 {
2150 struct iwl_mvm_delba_notif notif = {
2151 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2152 .metadata.sync = 1,
2153 .delba.baid = baid,
2154 };
2155 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2156 };
2157
2158 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2159 struct iwl_mvm_baid_data *data)
2160 {
2161 int i;
2162
2163 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2164
2165 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2166 int j;
2167 struct iwl_mvm_reorder_buffer *reorder_buf =
2168 &data->reorder_buf[i];
2169 struct iwl_mvm_reorder_buf_entry *entries =
2170 &data->entries[i * data->entries_per_queue];
2171
2172 spin_lock_bh(&reorder_buf->lock);
2173 if (likely(!reorder_buf->num_stored)) {
2174 spin_unlock_bh(&reorder_buf->lock);
2175 continue;
2176 }
2177
2178 /*
2179 * This shouldn't happen in regular DELBA since the internal
2180 * delBA notification should trigger a release of all frames in
2181 * the reorder buffer.
2182 */
2183 WARN_ON(1);
2184
2185 for (j = 0; j < reorder_buf->buf_size; j++)
2186 __skb_queue_purge(&entries[j].e.frames);
2187 /*
2188 * Prevent timer re-arm. This prevents a very far fetched case
2189 * where we timed out on the notification. There may be prior
2190 * RX frames pending in the RX queue before the notification
2191 * that might get processed between now and the actual deletion
2192 * and we would re-arm the timer although we are deleting the
2193 * reorder buffer.
2194 */
2195 reorder_buf->removed = true;
2196 spin_unlock_bh(&reorder_buf->lock);
2197 del_timer_sync(&reorder_buf->reorder_timer);
2198 }
2199 }
2200
2201 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2202 struct iwl_mvm_baid_data *data,
2203 u16 ssn, u16 buf_size)
2204 {
2205 int i;
2206
2207 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2208 struct iwl_mvm_reorder_buffer *reorder_buf =
2209 &data->reorder_buf[i];
2210 struct iwl_mvm_reorder_buf_entry *entries =
2211 &data->entries[i * data->entries_per_queue];
2212 int j;
2213
2214 reorder_buf->num_stored = 0;
2215 reorder_buf->head_sn = ssn;
2216 reorder_buf->buf_size = buf_size;
2217 /* rx reorder timer */
2218 timer_setup(&reorder_buf->reorder_timer,
2219 iwl_mvm_reorder_timer_expired, 0);
2220 spin_lock_init(&reorder_buf->lock);
2221 reorder_buf->mvm = mvm;
2222 reorder_buf->queue = i;
2223 reorder_buf->valid = false;
2224 for (j = 0; j < reorder_buf->buf_size; j++)
2225 __skb_queue_head_init(&entries[j].e.frames);
2226 }
2227 }
2228
2229 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2230 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2231 {
2232 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2233 struct iwl_mvm_add_sta_cmd cmd = {};
2234 struct iwl_mvm_baid_data *baid_data = NULL;
2235 int ret;
2236 u32 status;
2237
2238 lockdep_assert_held(&mvm->mutex);
2239
2240 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2241 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2242 return -ENOSPC;
2243 }
2244
2245 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2246 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2247
2248 /* sparse doesn't like the __align() so don't check */
2249 #ifndef __CHECKER__
2250 /*
2251 * The division below will be OK if either the cache line size
2252 * can be divided by the entry size (ALIGN will round up) or if
2253 * if the entry size can be divided by the cache line size, in
2254 * which case the ALIGN() will do nothing.
2255 */
2256 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2257 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2258 #endif
2259
2260 /*
2261 * Upward align the reorder buffer size to fill an entire cache
2262 * line for each queue, to avoid sharing cache lines between
2263 * different queues.
2264 */
2265 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2266
2267 /*
2268 * Allocate here so if allocation fails we can bail out early
2269 * before starting the BA session in the firmware
2270 */
2271 baid_data = kzalloc(sizeof(*baid_data) +
2272 mvm->trans->num_rx_queues *
2273 reorder_buf_size,
2274 GFP_KERNEL);
2275 if (!baid_data)
2276 return -ENOMEM;
2277
2278 /*
2279 * This division is why we need the above BUILD_BUG_ON(),
2280 * if that doesn't hold then this will not be right.
2281 */
2282 baid_data->entries_per_queue =
2283 reorder_buf_size / sizeof(baid_data->entries[0]);
2284 }
2285
2286 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2287 cmd.sta_id = mvm_sta->sta_id;
2288 cmd.add_modify = STA_MODE_MODIFY;
2289 if (start) {
2290 cmd.add_immediate_ba_tid = (u8) tid;
2291 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2292 cmd.rx_ba_window = cpu_to_le16(buf_size);
2293 } else {
2294 cmd.remove_immediate_ba_tid = (u8) tid;
2295 }
2296 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2297 STA_MODIFY_REMOVE_BA_TID;
2298
2299 status = ADD_STA_SUCCESS;
2300 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2301 iwl_mvm_add_sta_cmd_size(mvm),
2302 &cmd, &status);
2303 if (ret)
2304 goto out_free;
2305
2306 switch (status & IWL_ADD_STA_STATUS_MASK) {
2307 case ADD_STA_SUCCESS:
2308 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2309 start ? "start" : "stopp");
2310 break;
2311 case ADD_STA_IMMEDIATE_BA_FAILURE:
2312 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2313 ret = -ENOSPC;
2314 break;
2315 default:
2316 ret = -EIO;
2317 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2318 start ? "start" : "stopp", status);
2319 break;
2320 }
2321
2322 if (ret)
2323 goto out_free;
2324
2325 if (start) {
2326 u8 baid;
2327
2328 mvm->rx_ba_sessions++;
2329
2330 if (!iwl_mvm_has_new_rx_api(mvm))
2331 return 0;
2332
2333 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2334 ret = -EINVAL;
2335 goto out_free;
2336 }
2337 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2338 IWL_ADD_STA_BAID_SHIFT);
2339 baid_data->baid = baid;
2340 baid_data->timeout = timeout;
2341 baid_data->last_rx = jiffies;
2342 baid_data->rcu_ptr = &mvm->baid_map[baid];
2343 timer_setup(&baid_data->session_timer,
2344 iwl_mvm_rx_agg_session_expired, 0);
2345 baid_data->mvm = mvm;
2346 baid_data->tid = tid;
2347 baid_data->sta_id = mvm_sta->sta_id;
2348
2349 mvm_sta->tid_to_baid[tid] = baid;
2350 if (timeout)
2351 mod_timer(&baid_data->session_timer,
2352 TU_TO_EXP_TIME(timeout * 2));
2353
2354 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2355 /*
2356 * protect the BA data with RCU to cover a case where our
2357 * internal RX sync mechanism will timeout (not that it's
2358 * supposed to happen) and we will free the session data while
2359 * RX is being processed in parallel
2360 */
2361 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2362 mvm_sta->sta_id, tid, baid);
2363 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2364 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2365 } else {
2366 u8 baid = mvm_sta->tid_to_baid[tid];
2367
2368 if (mvm->rx_ba_sessions > 0)
2369 /* check that restart flow didn't zero the counter */
2370 mvm->rx_ba_sessions--;
2371 if (!iwl_mvm_has_new_rx_api(mvm))
2372 return 0;
2373
2374 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2375 return -EINVAL;
2376
2377 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2378 if (WARN_ON(!baid_data))
2379 return -EINVAL;
2380
2381 /* synchronize all rx queues so we can safely delete */
2382 iwl_mvm_free_reorder(mvm, baid_data);
2383 del_timer_sync(&baid_data->session_timer);
2384 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2385 kfree_rcu(baid_data, rcu_head);
2386 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2387 }
2388 return 0;
2389
2390 out_free:
2391 kfree(baid_data);
2392 return ret;
2393 }
2394
2395 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2396 int tid, u8 queue, bool start)
2397 {
2398 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2399 struct iwl_mvm_add_sta_cmd cmd = {};
2400 int ret;
2401 u32 status;
2402
2403 lockdep_assert_held(&mvm->mutex);
2404
2405 if (start) {
2406 mvm_sta->tfd_queue_msk |= BIT(queue);
2407 mvm_sta->tid_disable_agg &= ~BIT(tid);
2408 } else {
2409 /* In DQA-mode the queue isn't removed on agg termination */
2410 mvm_sta->tid_disable_agg |= BIT(tid);
2411 }
2412
2413 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2414 cmd.sta_id = mvm_sta->sta_id;
2415 cmd.add_modify = STA_MODE_MODIFY;
2416 if (!iwl_mvm_has_new_tx_api(mvm))
2417 cmd.modify_mask = STA_MODIFY_QUEUES;
2418 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2419 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2420 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2421
2422 status = ADD_STA_SUCCESS;
2423 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2424 iwl_mvm_add_sta_cmd_size(mvm),
2425 &cmd, &status);
2426 if (ret)
2427 return ret;
2428
2429 switch (status & IWL_ADD_STA_STATUS_MASK) {
2430 case ADD_STA_SUCCESS:
2431 break;
2432 default:
2433 ret = -EIO;
2434 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2435 start ? "start" : "stopp", status);
2436 break;
2437 }
2438
2439 return ret;
2440 }
2441
2442 const u8 tid_to_mac80211_ac[] = {
2443 IEEE80211_AC_BE,
2444 IEEE80211_AC_BK,
2445 IEEE80211_AC_BK,
2446 IEEE80211_AC_BE,
2447 IEEE80211_AC_VI,
2448 IEEE80211_AC_VI,
2449 IEEE80211_AC_VO,
2450 IEEE80211_AC_VO,
2451 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2452 };
2453
2454 static const u8 tid_to_ucode_ac[] = {
2455 AC_BE,
2456 AC_BK,
2457 AC_BK,
2458 AC_BE,
2459 AC_VI,
2460 AC_VI,
2461 AC_VO,
2462 AC_VO,
2463 };
2464
2465 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2466 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2467 {
2468 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2469 struct iwl_mvm_tid_data *tid_data;
2470 u16 normalized_ssn;
2471 int txq_id;
2472 int ret;
2473
2474 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2475 return -EINVAL;
2476
2477 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2478 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2479 IWL_ERR(mvm,
2480 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2481 mvmsta->tid_data[tid].state);
2482 return -ENXIO;
2483 }
2484
2485 lockdep_assert_held(&mvm->mutex);
2486
2487 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2488 iwl_mvm_has_new_tx_api(mvm)) {
2489 u8 ac = tid_to_mac80211_ac[tid];
2490
2491 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2492 if (ret)
2493 return ret;
2494 }
2495
2496 spin_lock_bh(&mvmsta->lock);
2497
2498 /* possible race condition - we entered D0i3 while starting agg */
2499 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2500 spin_unlock_bh(&mvmsta->lock);
2501 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2502 return -EIO;
2503 }
2504
2505 spin_lock(&mvm->queue_info_lock);
2506
2507 /*
2508 * Note the possible cases:
2509 * 1. An enabled TXQ - TXQ needs to become agg'ed
2510 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2511 * it as reserved
2512 */
2513 txq_id = mvmsta->tid_data[tid].txq_id;
2514 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2515 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2516 IWL_MVM_DQA_MIN_DATA_QUEUE,
2517 IWL_MVM_DQA_MAX_DATA_QUEUE);
2518 if (txq_id < 0) {
2519 ret = txq_id;
2520 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2521 goto release_locks;
2522 }
2523
2524 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2526 } else if (unlikely(mvm->queue_info[txq_id].status ==
2527 IWL_MVM_QUEUE_SHARED)) {
2528 ret = -ENXIO;
2529 IWL_DEBUG_TX_QUEUES(mvm,
2530 "Can't start tid %d agg on shared queue!\n",
2531 tid);
2532 goto release_locks;
2533 }
2534
2535 spin_unlock(&mvm->queue_info_lock);
2536
2537 IWL_DEBUG_TX_QUEUES(mvm,
2538 "AGG for tid %d will be on queue #%d\n",
2539 tid, txq_id);
2540
2541 tid_data = &mvmsta->tid_data[tid];
2542 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2543 tid_data->txq_id = txq_id;
2544 *ssn = tid_data->ssn;
2545
2546 IWL_DEBUG_TX_QUEUES(mvm,
2547 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2548 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2549 tid_data->next_reclaimed);
2550
2551 /*
2552 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2553 * to align the wrap around of ssn so we compare relevant values.
2554 */
2555 normalized_ssn = tid_data->ssn;
2556 if (mvm->trans->cfg->gen2)
2557 normalized_ssn &= 0xff;
2558
2559 if (normalized_ssn == tid_data->next_reclaimed) {
2560 tid_data->state = IWL_AGG_STARTING;
2561 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2562 } else {
2563 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2564 }
2565
2566 ret = 0;
2567 goto out;
2568
2569 release_locks:
2570 spin_unlock(&mvm->queue_info_lock);
2571 out:
2572 spin_unlock_bh(&mvmsta->lock);
2573
2574 return ret;
2575 }
2576
2577 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2578 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2579 bool amsdu)
2580 {
2581 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2582 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2583 unsigned int wdg_timeout =
2584 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2585 int queue, ret;
2586 bool alloc_queue = true;
2587 enum iwl_mvm_queue_status queue_status;
2588 u16 ssn;
2589
2590 struct iwl_trans_txq_scd_cfg cfg = {
2591 .sta_id = mvmsta->sta_id,
2592 .tid = tid,
2593 .frame_limit = buf_size,
2594 .aggregate = true,
2595 };
2596
2597 /*
2598 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2599 * manager, so this function should never be called in this case.
2600 */
2601 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2602 return -EINVAL;
2603
2604 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2605 != IWL_MAX_TID_COUNT);
2606
2607 spin_lock_bh(&mvmsta->lock);
2608 ssn = tid_data->ssn;
2609 queue = tid_data->txq_id;
2610 tid_data->state = IWL_AGG_ON;
2611 mvmsta->agg_tids |= BIT(tid);
2612 tid_data->ssn = 0xffff;
2613 tid_data->amsdu_in_ampdu_allowed = amsdu;
2614 spin_unlock_bh(&mvmsta->lock);
2615
2616 if (iwl_mvm_has_new_tx_api(mvm)) {
2617 /*
2618 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2619 * would have failed, so if we are here there is no need to
2620 * allocate a queue.
2621 * However, if aggregation size is different than the default
2622 * size, the scheduler should be reconfigured.
2623 * We cannot do this with the new TX API, so return unsupported
2624 * for now, until it will be offloaded to firmware..
2625 * Note that if SCD default value changes - this condition
2626 * should be updated as well.
2627 */
2628 if (buf_size < IWL_FRAME_LIMIT)
2629 return -ENOTSUPP;
2630
2631 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2632 if (ret)
2633 return -EIO;
2634 goto out;
2635 }
2636
2637 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2638
2639 spin_lock_bh(&mvm->queue_info_lock);
2640 queue_status = mvm->queue_info[queue].status;
2641 spin_unlock_bh(&mvm->queue_info_lock);
2642
2643 /* Maybe there is no need to even alloc a queue... */
2644 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2645 alloc_queue = false;
2646
2647 /*
2648 * Only reconfig the SCD for the queue if the window size has
2649 * changed from current (become smaller)
2650 */
2651 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2652 /*
2653 * If reconfiguring an existing queue, it first must be
2654 * drained
2655 */
2656 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2657 BIT(queue));
2658 if (ret) {
2659 IWL_ERR(mvm,
2660 "Error draining queue before reconfig\n");
2661 return ret;
2662 }
2663
2664 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2665 mvmsta->sta_id, tid,
2666 buf_size, ssn);
2667 if (ret) {
2668 IWL_ERR(mvm,
2669 "Error reconfiguring TXQ #%d\n", queue);
2670 return ret;
2671 }
2672 }
2673
2674 if (alloc_queue)
2675 iwl_mvm_enable_txq(mvm, queue,
2676 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2677 &cfg, wdg_timeout);
2678
2679 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2680 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2681 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2682 if (ret)
2683 return -EIO;
2684 }
2685
2686 /* No need to mark as reserved */
2687 spin_lock_bh(&mvm->queue_info_lock);
2688 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2689 spin_unlock_bh(&mvm->queue_info_lock);
2690
2691 out:
2692 /*
2693 * Even though in theory the peer could have different
2694 * aggregation reorder buffer sizes for different sessions,
2695 * our ucode doesn't allow for that and has a global limit
2696 * for each station. Therefore, use the minimum of all the
2697 * aggregation sessions and our default value.
2698 */
2699 mvmsta->max_agg_bufsize =
2700 min(mvmsta->max_agg_bufsize, buf_size);
2701 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2702
2703 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2704 sta->addr, tid);
2705
2706 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
2707 }
2708
2709 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2710 struct iwl_mvm_sta *mvmsta,
2711 struct iwl_mvm_tid_data *tid_data)
2712 {
2713 u16 txq_id = tid_data->txq_id;
2714
2715 if (iwl_mvm_has_new_tx_api(mvm))
2716 return;
2717
2718 spin_lock_bh(&mvm->queue_info_lock);
2719 /*
2720 * The TXQ is marked as reserved only if no traffic came through yet
2721 * This means no traffic has been sent on this TID (agg'd or not), so
2722 * we no longer have use for the queue. Since it hasn't even been
2723 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2724 * free.
2725 */
2726 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
2727 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2728 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
2729 }
2730
2731 spin_unlock_bh(&mvm->queue_info_lock);
2732 }
2733
2734 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2735 struct ieee80211_sta *sta, u16 tid)
2736 {
2737 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2738 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2739 u16 txq_id;
2740 int err;
2741
2742 /*
2743 * If mac80211 is cleaning its state, then say that we finished since
2744 * our state has been cleared anyway.
2745 */
2746 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2747 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2748 return 0;
2749 }
2750
2751 spin_lock_bh(&mvmsta->lock);
2752
2753 txq_id = tid_data->txq_id;
2754
2755 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2756 mvmsta->sta_id, tid, txq_id, tid_data->state);
2757
2758 mvmsta->agg_tids &= ~BIT(tid);
2759
2760 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2761
2762 switch (tid_data->state) {
2763 case IWL_AGG_ON:
2764 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2765
2766 IWL_DEBUG_TX_QUEUES(mvm,
2767 "ssn = %d, next_recl = %d\n",
2768 tid_data->ssn, tid_data->next_reclaimed);
2769
2770 tid_data->ssn = 0xffff;
2771 tid_data->state = IWL_AGG_OFF;
2772 spin_unlock_bh(&mvmsta->lock);
2773
2774 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2775
2776 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2777 return 0;
2778 case IWL_AGG_STARTING:
2779 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2780 /*
2781 * The agg session has been stopped before it was set up. This
2782 * can happen when the AddBA timer times out for example.
2783 */
2784
2785 /* No barriers since we are under mutex */
2786 lockdep_assert_held(&mvm->mutex);
2787
2788 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2789 tid_data->state = IWL_AGG_OFF;
2790 err = 0;
2791 break;
2792 default:
2793 IWL_ERR(mvm,
2794 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2795 mvmsta->sta_id, tid, tid_data->state);
2796 IWL_ERR(mvm,
2797 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2798 err = -EINVAL;
2799 }
2800
2801 spin_unlock_bh(&mvmsta->lock);
2802
2803 return err;
2804 }
2805
2806 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2807 struct ieee80211_sta *sta, u16 tid)
2808 {
2809 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2810 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2811 u16 txq_id;
2812 enum iwl_mvm_agg_state old_state;
2813
2814 /*
2815 * First set the agg state to OFF to avoid calling
2816 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2817 */
2818 spin_lock_bh(&mvmsta->lock);
2819 txq_id = tid_data->txq_id;
2820 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2821 mvmsta->sta_id, tid, txq_id, tid_data->state);
2822 old_state = tid_data->state;
2823 tid_data->state = IWL_AGG_OFF;
2824 mvmsta->agg_tids &= ~BIT(tid);
2825 spin_unlock_bh(&mvmsta->lock);
2826
2827 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2828
2829 if (old_state >= IWL_AGG_ON) {
2830 iwl_mvm_drain_sta(mvm, mvmsta, true);
2831
2832 if (iwl_mvm_has_new_tx_api(mvm)) {
2833 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2834 BIT(tid), 0))
2835 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2836 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2837 } else {
2838 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2839 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2840 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2841 }
2842
2843 iwl_mvm_drain_sta(mvm, mvmsta, false);
2844
2845 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2846 }
2847
2848 return 0;
2849 }
2850
2851 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2852 {
2853 int i, max = -1, max_offs = -1;
2854
2855 lockdep_assert_held(&mvm->mutex);
2856
2857 /* Pick the unused key offset with the highest 'deleted'
2858 * counter. Every time a key is deleted, all the counters
2859 * are incremented and the one that was just deleted is
2860 * reset to zero. Thus, the highest counter is the one
2861 * that was deleted longest ago. Pick that one.
2862 */
2863 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2864 if (test_bit(i, mvm->fw_key_table))
2865 continue;
2866 if (mvm->fw_key_deleted[i] > max) {
2867 max = mvm->fw_key_deleted[i];
2868 max_offs = i;
2869 }
2870 }
2871
2872 if (max_offs < 0)
2873 return STA_KEY_IDX_INVALID;
2874
2875 return max_offs;
2876 }
2877
2878 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2879 struct ieee80211_vif *vif,
2880 struct ieee80211_sta *sta)
2881 {
2882 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2883
2884 if (sta)
2885 return iwl_mvm_sta_from_mac80211(sta);
2886
2887 /*
2888 * The device expects GTKs for station interfaces to be
2889 * installed as GTKs for the AP station. If we have no
2890 * station ID, then use AP's station ID.
2891 */
2892 if (vif->type == NL80211_IFTYPE_STATION &&
2893 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2894 u8 sta_id = mvmvif->ap_sta_id;
2895
2896 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2897 lockdep_is_held(&mvm->mutex));
2898
2899 /*
2900 * It is possible that the 'sta' parameter is NULL,
2901 * for example when a GTK is removed - the sta_id will then
2902 * be the AP ID, and no station was passed by mac80211.
2903 */
2904 if (IS_ERR_OR_NULL(sta))
2905 return NULL;
2906
2907 return iwl_mvm_sta_from_mac80211(sta);
2908 }
2909
2910 return NULL;
2911 }
2912
2913 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2914 u32 sta_id,
2915 struct ieee80211_key_conf *key, bool mcast,
2916 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2917 u8 key_offset, bool mfp)
2918 {
2919 union {
2920 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2921 struct iwl_mvm_add_sta_key_cmd cmd;
2922 } u = {};
2923 __le16 key_flags;
2924 int ret;
2925 u32 status;
2926 u16 keyidx;
2927 u64 pn = 0;
2928 int i, size;
2929 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2930 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2931
2932 if (sta_id == IWL_MVM_INVALID_STA)
2933 return -EINVAL;
2934
2935 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2936 STA_KEY_FLG_KEYID_MSK;
2937 key_flags = cpu_to_le16(keyidx);
2938 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2939
2940 switch (key->cipher) {
2941 case WLAN_CIPHER_SUITE_TKIP:
2942 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2943 if (new_api) {
2944 memcpy((void *)&u.cmd.tx_mic_key,
2945 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2946 IWL_MIC_KEY_SIZE);
2947
2948 memcpy((void *)&u.cmd.rx_mic_key,
2949 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2950 IWL_MIC_KEY_SIZE);
2951 pn = atomic64_read(&key->tx_pn);
2952
2953 } else {
2954 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2955 for (i = 0; i < 5; i++)
2956 u.cmd_v1.tkip_rx_ttak[i] =
2957 cpu_to_le16(tkip_p1k[i]);
2958 }
2959 memcpy(u.cmd.common.key, key->key, key->keylen);
2960 break;
2961 case WLAN_CIPHER_SUITE_CCMP:
2962 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2963 memcpy(u.cmd.common.key, key->key, key->keylen);
2964 if (new_api)
2965 pn = atomic64_read(&key->tx_pn);
2966 break;
2967 case WLAN_CIPHER_SUITE_WEP104:
2968 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2969 /* fall through */
2970 case WLAN_CIPHER_SUITE_WEP40:
2971 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2972 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2973 break;
2974 case WLAN_CIPHER_SUITE_GCMP_256:
2975 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2976 /* fall through */
2977 case WLAN_CIPHER_SUITE_GCMP:
2978 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2979 memcpy(u.cmd.common.key, key->key, key->keylen);
2980 if (new_api)
2981 pn = atomic64_read(&key->tx_pn);
2982 break;
2983 default:
2984 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2985 memcpy(u.cmd.common.key, key->key, key->keylen);
2986 }
2987
2988 if (mcast)
2989 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2990 if (mfp)
2991 key_flags |= cpu_to_le16(STA_KEY_MFP);
2992
2993 u.cmd.common.key_offset = key_offset;
2994 u.cmd.common.key_flags = key_flags;
2995 u.cmd.common.sta_id = sta_id;
2996
2997 if (new_api) {
2998 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2999 size = sizeof(u.cmd);
3000 } else {
3001 size = sizeof(u.cmd_v1);
3002 }
3003
3004 status = ADD_STA_SUCCESS;
3005 if (cmd_flags & CMD_ASYNC)
3006 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3007 &u.cmd);
3008 else
3009 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3010 &u.cmd, &status);
3011
3012 switch (status) {
3013 case ADD_STA_SUCCESS:
3014 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3015 break;
3016 default:
3017 ret = -EIO;
3018 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3019 break;
3020 }
3021
3022 return ret;
3023 }
3024
3025 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3026 struct ieee80211_key_conf *keyconf,
3027 u8 sta_id, bool remove_key)
3028 {
3029 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3030
3031 /* verify the key details match the required command's expectations */
3032 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3033 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3034 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3035 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3036 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3037 return -EINVAL;
3038
3039 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3040 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3041 return -EINVAL;
3042
3043 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3044 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3045
3046 if (remove_key) {
3047 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3048 } else {
3049 struct ieee80211_key_seq seq;
3050 const u8 *pn;
3051
3052 switch (keyconf->cipher) {
3053 case WLAN_CIPHER_SUITE_AES_CMAC:
3054 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3055 break;
3056 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3057 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3058 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3059 break;
3060 default:
3061 return -EINVAL;
3062 }
3063
3064 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3065 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3066 igtk_cmd.ctrl_flags |=
3067 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3068 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3069 pn = seq.aes_cmac.pn;
3070 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3071 ((u64) pn[4] << 8) |
3072 ((u64) pn[3] << 16) |
3073 ((u64) pn[2] << 24) |
3074 ((u64) pn[1] << 32) |
3075 ((u64) pn[0] << 40));
3076 }
3077
3078 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3079 remove_key ? "removing" : "installing",
3080 igtk_cmd.sta_id);
3081
3082 if (!iwl_mvm_has_new_rx_api(mvm)) {
3083 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3084 .ctrl_flags = igtk_cmd.ctrl_flags,
3085 .key_id = igtk_cmd.key_id,
3086 .sta_id = igtk_cmd.sta_id,
3087 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3088 };
3089
3090 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3091 ARRAY_SIZE(igtk_cmd_v1.igtk));
3092 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3093 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3094 }
3095 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3096 sizeof(igtk_cmd), &igtk_cmd);
3097 }
3098
3099
3100 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3101 struct ieee80211_vif *vif,
3102 struct ieee80211_sta *sta)
3103 {
3104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3105
3106 if (sta)
3107 return sta->addr;
3108
3109 if (vif->type == NL80211_IFTYPE_STATION &&
3110 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3111 u8 sta_id = mvmvif->ap_sta_id;
3112 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3113 lockdep_is_held(&mvm->mutex));
3114 return sta->addr;
3115 }
3116
3117
3118 return NULL;
3119 }
3120
3121 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3122 struct ieee80211_vif *vif,
3123 struct ieee80211_sta *sta,
3124 struct ieee80211_key_conf *keyconf,
3125 u8 key_offset,
3126 bool mcast)
3127 {
3128 int ret;
3129 const u8 *addr;
3130 struct ieee80211_key_seq seq;
3131 u16 p1k[5];
3132 u32 sta_id;
3133 bool mfp = false;
3134
3135 if (sta) {
3136 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3137
3138 sta_id = mvm_sta->sta_id;
3139 mfp = sta->mfp;
3140 } else if (vif->type == NL80211_IFTYPE_AP &&
3141 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3142 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3143
3144 sta_id = mvmvif->mcast_sta.sta_id;
3145 } else {
3146 IWL_ERR(mvm, "Failed to find station id\n");
3147 return -EINVAL;
3148 }
3149
3150 switch (keyconf->cipher) {
3151 case WLAN_CIPHER_SUITE_TKIP:
3152 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3153 /* get phase 1 key from mac80211 */
3154 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3155 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3156 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3157 seq.tkip.iv32, p1k, 0, key_offset,
3158 mfp);
3159 break;
3160 case WLAN_CIPHER_SUITE_CCMP:
3161 case WLAN_CIPHER_SUITE_WEP40:
3162 case WLAN_CIPHER_SUITE_WEP104:
3163 case WLAN_CIPHER_SUITE_GCMP:
3164 case WLAN_CIPHER_SUITE_GCMP_256:
3165 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3166 0, NULL, 0, key_offset, mfp);
3167 break;
3168 default:
3169 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3170 0, NULL, 0, key_offset, mfp);
3171 }
3172
3173 return ret;
3174 }
3175
3176 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3177 struct ieee80211_key_conf *keyconf,
3178 bool mcast)
3179 {
3180 union {
3181 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3182 struct iwl_mvm_add_sta_key_cmd cmd;
3183 } u = {};
3184 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3185 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3186 __le16 key_flags;
3187 int ret, size;
3188 u32 status;
3189
3190 /* This is a valid situation for GTK removal */
3191 if (sta_id == IWL_MVM_INVALID_STA)
3192 return 0;
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 = IWL_MVM_INVALID_STA;
3238 int ret;
3239 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3240
3241 lockdep_assert_held(&mvm->mutex);
3242
3243 if (vif->type != NL80211_IFTYPE_AP ||
3244 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3245 /* Get the station id from the mvm local station table */
3246 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3247 if (!mvm_sta) {
3248 IWL_ERR(mvm, "Failed to find station\n");
3249 return -EINVAL;
3250 }
3251 sta_id = mvm_sta->sta_id;
3252
3253 /*
3254 * It is possible that the 'sta' parameter is NULL, and thus
3255 * there is a need to retrieve the sta from the local station
3256 * table.
3257 */
3258 if (!sta) {
3259 sta = rcu_dereference_protected(
3260 mvm->fw_id_to_mac_id[sta_id],
3261 lockdep_is_held(&mvm->mutex));
3262 if (IS_ERR_OR_NULL(sta)) {
3263 IWL_ERR(mvm, "Invalid station id\n");
3264 return -EINVAL;
3265 }
3266 }
3267
3268 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3269 return -EINVAL;
3270 } else {
3271 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3272
3273 sta_id = mvmvif->mcast_sta.sta_id;
3274 }
3275
3276 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3277 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3278 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3279 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3280 goto end;
3281 }
3282
3283 /* If the key_offset is not pre-assigned, we need to find a
3284 * new offset to use. In normal cases, the offset is not
3285 * pre-assigned, but during HW_RESTART we want to reuse the
3286 * same indices, so we pass them when this function is called.
3287 *
3288 * In D3 entry, we need to hardcoded the indices (because the
3289 * firmware hardcodes the PTK offset to 0). In this case, we
3290 * need to make sure we don't overwrite the hw_key_idx in the
3291 * keyconf structure, because otherwise we cannot configure
3292 * the original ones back when resuming.
3293 */
3294 if (key_offset == STA_KEY_IDX_INVALID) {
3295 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3296 if (key_offset == STA_KEY_IDX_INVALID)
3297 return -ENOSPC;
3298 keyconf->hw_key_idx = key_offset;
3299 }
3300
3301 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3302 if (ret)
3303 goto end;
3304
3305 /*
3306 * For WEP, the same key is used for multicast and unicast. Upload it
3307 * again, using the same key offset, and now pointing the other one
3308 * to the same key slot (offset).
3309 * If this fails, remove the original as well.
3310 */
3311 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3312 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3313 sta) {
3314 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3315 key_offset, !mcast);
3316 if (ret) {
3317 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3318 goto end;
3319 }
3320 }
3321
3322 __set_bit(key_offset, mvm->fw_key_table);
3323
3324 end:
3325 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3326 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3327 sta ? sta->addr : zero_addr, ret);
3328 return ret;
3329 }
3330
3331 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3332 struct ieee80211_vif *vif,
3333 struct ieee80211_sta *sta,
3334 struct ieee80211_key_conf *keyconf)
3335 {
3336 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3337 struct iwl_mvm_sta *mvm_sta;
3338 u8 sta_id = IWL_MVM_INVALID_STA;
3339 int ret, i;
3340
3341 lockdep_assert_held(&mvm->mutex);
3342
3343 /* Get the station from the mvm local station table */
3344 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3345 if (mvm_sta)
3346 sta_id = mvm_sta->sta_id;
3347 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3348 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3349
3350
3351 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3352 keyconf->keyidx, sta_id);
3353
3354 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3355 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3356 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3357 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3358
3359 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3360 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3361 keyconf->hw_key_idx);
3362 return -ENOENT;
3363 }
3364
3365 /* track which key was deleted last */
3366 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3367 if (mvm->fw_key_deleted[i] < U8_MAX)
3368 mvm->fw_key_deleted[i]++;
3369 }
3370 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3371
3372 if (sta && !mvm_sta) {
3373 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3374 return 0;
3375 }
3376
3377 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3378 if (ret)
3379 return ret;
3380
3381 /* delete WEP key twice to get rid of (now useless) offset */
3382 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3383 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3384 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3385
3386 return ret;
3387 }
3388
3389 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3390 struct ieee80211_vif *vif,
3391 struct ieee80211_key_conf *keyconf,
3392 struct ieee80211_sta *sta, u32 iv32,
3393 u16 *phase1key)
3394 {
3395 struct iwl_mvm_sta *mvm_sta;
3396 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3397 bool mfp = sta ? sta->mfp : false;
3398
3399 rcu_read_lock();
3400
3401 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3402 if (WARN_ON_ONCE(!mvm_sta))
3403 goto unlock;
3404 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3405 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3406 mfp);
3407
3408 unlock:
3409 rcu_read_unlock();
3410 }
3411
3412 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3413 struct ieee80211_sta *sta)
3414 {
3415 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3416 struct iwl_mvm_add_sta_cmd cmd = {
3417 .add_modify = STA_MODE_MODIFY,
3418 .sta_id = mvmsta->sta_id,
3419 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3420 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3421 };
3422 int ret;
3423
3424 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3425 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3426 if (ret)
3427 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3428 }
3429
3430 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3431 struct ieee80211_sta *sta,
3432 enum ieee80211_frame_release_type reason,
3433 u16 cnt, u16 tids, bool more_data,
3434 bool single_sta_queue)
3435 {
3436 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3437 struct iwl_mvm_add_sta_cmd cmd = {
3438 .add_modify = STA_MODE_MODIFY,
3439 .sta_id = mvmsta->sta_id,
3440 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3441 .sleep_tx_count = cpu_to_le16(cnt),
3442 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3443 };
3444 int tid, ret;
3445 unsigned long _tids = tids;
3446
3447 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3448 * Note that this field is reserved and unused by firmware not
3449 * supporting GO uAPSD, so it's safe to always do this.
3450 */
3451 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3452 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3453
3454 /* If we're releasing frames from aggregation or dqa queues then check
3455 * if all the queues that we're releasing frames from, combined, have:
3456 * - more frames than the service period, in which case more_data
3457 * needs to be set
3458 * - fewer than 'cnt' frames, in which case we need to adjust the
3459 * firmware command (but do that unconditionally)
3460 */
3461 if (single_sta_queue) {
3462 int remaining = cnt;
3463 int sleep_tx_count;
3464
3465 spin_lock_bh(&mvmsta->lock);
3466 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3467 struct iwl_mvm_tid_data *tid_data;
3468 u16 n_queued;
3469
3470 tid_data = &mvmsta->tid_data[tid];
3471
3472 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3473 if (n_queued > remaining) {
3474 more_data = true;
3475 remaining = 0;
3476 break;
3477 }
3478 remaining -= n_queued;
3479 }
3480 sleep_tx_count = cnt - remaining;
3481 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3482 mvmsta->sleep_tx_count = sleep_tx_count;
3483 spin_unlock_bh(&mvmsta->lock);
3484
3485 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3486 if (WARN_ON(cnt - remaining == 0)) {
3487 ieee80211_sta_eosp(sta);
3488 return;
3489 }
3490 }
3491
3492 /* Note: this is ignored by firmware not supporting GO uAPSD */
3493 if (more_data)
3494 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3495
3496 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3497 mvmsta->next_status_eosp = true;
3498 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3499 } else {
3500 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3501 }
3502
3503 /* block the Tx queues until the FW updated the sleep Tx count */
3504 iwl_trans_block_txq_ptrs(mvm->trans, true);
3505
3506 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3507 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3508 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3509 if (ret)
3510 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3511 }
3512
3513 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3514 struct iwl_rx_cmd_buffer *rxb)
3515 {
3516 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3517 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3518 struct ieee80211_sta *sta;
3519 u32 sta_id = le32_to_cpu(notif->sta_id);
3520
3521 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3522 return;
3523
3524 rcu_read_lock();
3525 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3526 if (!IS_ERR_OR_NULL(sta))
3527 ieee80211_sta_eosp(sta);
3528 rcu_read_unlock();
3529 }
3530
3531 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3532 struct iwl_mvm_sta *mvmsta, bool disable)
3533 {
3534 struct iwl_mvm_add_sta_cmd cmd = {
3535 .add_modify = STA_MODE_MODIFY,
3536 .sta_id = mvmsta->sta_id,
3537 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3538 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3539 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3540 };
3541 int ret;
3542
3543 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3544 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3545 if (ret)
3546 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3547 }
3548
3549 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3550 struct ieee80211_sta *sta,
3551 bool disable)
3552 {
3553 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3554
3555 spin_lock_bh(&mvm_sta->lock);
3556
3557 if (mvm_sta->disable_tx == disable) {
3558 spin_unlock_bh(&mvm_sta->lock);
3559 return;
3560 }
3561
3562 mvm_sta->disable_tx = disable;
3563
3564 /* Tell mac80211 to start/stop queuing tx for this station */
3565 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3566
3567 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3568
3569 spin_unlock_bh(&mvm_sta->lock);
3570 }
3571
3572 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3573 struct iwl_mvm_vif *mvmvif,
3574 struct iwl_mvm_int_sta *sta,
3575 bool disable)
3576 {
3577 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3578 struct iwl_mvm_add_sta_cmd cmd = {
3579 .add_modify = STA_MODE_MODIFY,
3580 .sta_id = sta->sta_id,
3581 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3582 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3583 .mac_id_n_color = cpu_to_le32(id),
3584 };
3585 int ret;
3586
3587 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3588 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3589 if (ret)
3590 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3591 }
3592
3593 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3594 struct iwl_mvm_vif *mvmvif,
3595 bool disable)
3596 {
3597 struct ieee80211_sta *sta;
3598 struct iwl_mvm_sta *mvm_sta;
3599 int i;
3600
3601 lockdep_assert_held(&mvm->mutex);
3602
3603 /* Block/unblock all the stations of the given mvmvif */
3604 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3605 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3606 lockdep_is_held(&mvm->mutex));
3607 if (IS_ERR_OR_NULL(sta))
3608 continue;
3609
3610 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3611 if (mvm_sta->mac_id_n_color !=
3612 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3613 continue;
3614
3615 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3616 }
3617
3618 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3619 return;
3620
3621 /* Need to block/unblock also multicast station */
3622 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3623 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3624 &mvmvif->mcast_sta, disable);
3625
3626 /*
3627 * Only unblock the broadcast station (FW blocks it for immediate
3628 * quiet, not the driver)
3629 */
3630 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3631 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3632 &mvmvif->bcast_sta, disable);
3633 }
3634
3635 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3636 {
3637 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3638 struct iwl_mvm_sta *mvmsta;
3639
3640 rcu_read_lock();
3641
3642 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3643
3644 if (!WARN_ON(!mvmsta))
3645 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3646
3647 rcu_read_unlock();
3648 }
3649
3650 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3651 {
3652 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3653
3654 /*
3655 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3656 * to align the wrap around of ssn so we compare relevant values.
3657 */
3658 if (mvm->trans->cfg->gen2)
3659 sn &= 0xff;
3660
3661 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3662 }
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