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selinux: fix overflow and 0 length allocations
[deliverable/linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / sta.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "sta.h"
71 #include "rs.h"
72
73 /*
74 * New version of ADD_STA_sta command added new fields at the end of the
75 * structure, so sending the size of the relevant API's structure is enough to
76 * support both API versions.
77 */
78 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
79 {
80 return iwl_mvm_has_new_rx_api(mvm) ?
81 sizeof(struct iwl_mvm_add_sta_cmd) :
82 sizeof(struct iwl_mvm_add_sta_cmd_v7);
83 }
84
85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
86 enum nl80211_iftype iftype)
87 {
88 int sta_id;
89 u32 reserved_ids = 0;
90
91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
93
94 lockdep_assert_held(&mvm->mutex);
95
96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
97 if (iftype != NL80211_IFTYPE_STATION)
98 reserved_ids = BIT(0);
99
100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
102 if (BIT(sta_id) & reserved_ids)
103 continue;
104
105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
106 lockdep_is_held(&mvm->mutex)))
107 return sta_id;
108 }
109 return IWL_MVM_STATION_COUNT;
110 }
111
112 /* send station add/update command to firmware */
113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
114 bool update, unsigned int flags)
115 {
116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
117 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
118 .sta_id = mvm_sta->sta_id,
119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
120 .add_modify = update ? 1 : 0,
121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
122 STA_FLG_MIMO_EN_MSK),
123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
124 };
125 int ret;
126 u32 status;
127 u32 agg_size = 0, mpdu_dens = 0;
128
129 if (!update || (flags & STA_MODIFY_QUEUES)) {
130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132
133 if (flags & STA_MODIFY_QUEUES)
134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
135 }
136
137 switch (sta->bandwidth) {
138 case IEEE80211_STA_RX_BW_160:
139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
140 /* fall through */
141 case IEEE80211_STA_RX_BW_80:
142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
143 /* fall through */
144 case IEEE80211_STA_RX_BW_40:
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
146 /* fall through */
147 case IEEE80211_STA_RX_BW_20:
148 if (sta->ht_cap.ht_supported)
149 add_sta_cmd.station_flags |=
150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
151 break;
152 }
153
154 switch (sta->rx_nss) {
155 case 1:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case 2:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
160 break;
161 case 3 ... 8:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
163 break;
164 }
165
166 switch (sta->smps_mode) {
167 case IEEE80211_SMPS_AUTOMATIC:
168 case IEEE80211_SMPS_NUM_MODES:
169 WARN_ON(1);
170 break;
171 case IEEE80211_SMPS_STATIC:
172 /* override NSS */
173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
175 break;
176 case IEEE80211_SMPS_DYNAMIC:
177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
178 break;
179 case IEEE80211_SMPS_OFF:
180 /* nothing */
181 break;
182 }
183
184 if (sta->ht_cap.ht_supported) {
185 add_sta_cmd.station_flags_msk |=
186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
187 STA_FLG_AGG_MPDU_DENS_MSK);
188
189 mpdu_dens = sta->ht_cap.ampdu_density;
190 }
191
192 if (sta->vht_cap.vht_supported) {
193 agg_size = sta->vht_cap.cap &
194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
195 agg_size >>=
196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
197 } else if (sta->ht_cap.ht_supported) {
198 agg_size = sta->ht_cap.ampdu_factor;
199 }
200
201 add_sta_cmd.station_flags |=
202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
203 add_sta_cmd.station_flags |=
204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
205
206 status = ADD_STA_SUCCESS;
207 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
208 iwl_mvm_add_sta_cmd_size(mvm),
209 &add_sta_cmd, &status);
210 if (ret)
211 return ret;
212
213 switch (status & IWL_ADD_STA_STATUS_MASK) {
214 case ADD_STA_SUCCESS:
215 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
216 break;
217 default:
218 ret = -EIO;
219 IWL_ERR(mvm, "ADD_STA failed\n");
220 break;
221 }
222
223 return ret;
224 }
225
226 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
227 {
228 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
229 struct iwl_mvm_baid_data *ba_data;
230 struct ieee80211_sta *sta;
231 struct iwl_mvm_sta *mvm_sta;
232 unsigned long timeout;
233
234 rcu_read_lock();
235
236 ba_data = rcu_dereference(*rcu_ptr);
237
238 if (WARN_ON(!ba_data))
239 goto unlock;
240
241 if (!ba_data->timeout)
242 goto unlock;
243
244 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
245 if (time_is_after_jiffies(timeout)) {
246 mod_timer(&ba_data->session_timer, timeout);
247 goto unlock;
248 }
249
250 /* Timer expired */
251 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
252 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
253 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
254 sta->addr, ba_data->tid);
255 unlock:
256 rcu_read_unlock();
257 }
258
259 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
260 struct ieee80211_sta *sta)
261 {
262 unsigned long used_hw_queues;
263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
264 unsigned int wdg_timeout =
265 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
266 u32 ac;
267
268 lockdep_assert_held(&mvm->mutex);
269
270 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
271
272 /* Find available queues, and allocate them to the ACs */
273 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
274 u8 queue = find_first_zero_bit(&used_hw_queues,
275 mvm->first_agg_queue);
276
277 if (queue >= mvm->first_agg_queue) {
278 IWL_ERR(mvm, "Failed to allocate STA queue\n");
279 return -EBUSY;
280 }
281
282 __set_bit(queue, &used_hw_queues);
283 mvmsta->hw_queue[ac] = queue;
284 }
285
286 /* Found a place for all queues - enable them */
287 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
288 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
289 mvmsta->hw_queue[ac],
290 iwl_mvm_ac_to_tx_fifo[ac], 0,
291 wdg_timeout);
292 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
293 }
294
295 return 0;
296 }
297
298 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
299 struct ieee80211_sta *sta)
300 {
301 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
302 unsigned long sta_msk;
303 int i;
304
305 lockdep_assert_held(&mvm->mutex);
306
307 /* disable the TDLS STA-specific queues */
308 sta_msk = mvmsta->tfd_queue_msk;
309 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
310 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
311 }
312
313 /* Disable aggregations for a bitmap of TIDs for a given station */
314 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
315 unsigned long disable_agg_tids,
316 bool remove_queue)
317 {
318 struct iwl_mvm_add_sta_cmd cmd = {};
319 struct ieee80211_sta *sta;
320 struct iwl_mvm_sta *mvmsta;
321 u32 status;
322 u8 sta_id;
323 int ret;
324
325 spin_lock_bh(&mvm->queue_info_lock);
326 sta_id = mvm->queue_info[queue].ra_sta_id;
327 spin_unlock_bh(&mvm->queue_info_lock);
328
329 rcu_read_lock();
330
331 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
332
333 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
334 rcu_read_unlock();
335 return -EINVAL;
336 }
337
338 mvmsta = iwl_mvm_sta_from_mac80211(sta);
339
340 mvmsta->tid_disable_agg |= disable_agg_tids;
341
342 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
343 cmd.sta_id = mvmsta->sta_id;
344 cmd.add_modify = STA_MODE_MODIFY;
345 cmd.modify_mask = STA_MODIFY_QUEUES;
346 if (disable_agg_tids)
347 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
348 if (remove_queue)
349 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
350 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
351 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
352
353 rcu_read_unlock();
354
355 /* Notify FW of queue removal from the STA queues */
356 status = ADD_STA_SUCCESS;
357 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
358 iwl_mvm_add_sta_cmd_size(mvm),
359 &cmd, &status);
360
361 return ret;
362 }
363
364 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
365 {
366 struct ieee80211_sta *sta;
367 struct iwl_mvm_sta *mvmsta;
368 unsigned long tid_bitmap;
369 unsigned long agg_tids = 0;
370 s8 sta_id;
371 int tid;
372
373 lockdep_assert_held(&mvm->mutex);
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 spin_lock_bh(&mvm->queue_info_lock);
415 sta_id = mvm->queue_info[queue].ra_sta_id;
416 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
417 spin_unlock_bh(&mvm->queue_info_lock);
418
419 rcu_read_lock();
420
421 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
422
423 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
424 rcu_read_unlock();
425 return 0;
426 }
427
428 mvmsta = iwl_mvm_sta_from_mac80211(sta);
429
430 spin_lock_bh(&mvmsta->lock);
431 /* Unmap MAC queues and TIDs from this queue */
432 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
433 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
434 disable_agg_tids |= BIT(tid);
435 mvmsta->tid_data[tid].txq_id = IEEE80211_INVAL_HW_QUEUE;
436 }
437
438 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
439 spin_unlock_bh(&mvmsta->lock);
440
441 rcu_read_unlock();
442
443 spin_lock_bh(&mvm->queue_info_lock);
444 /* Unmap MAC queues and TIDs from this queue */
445 mvm->queue_info[queue].hw_queue_to_mac80211 = 0;
446 mvm->queue_info[queue].hw_queue_refcount = 0;
447 mvm->queue_info[queue].tid_bitmap = 0;
448 spin_unlock_bh(&mvm->queue_info_lock);
449
450 return disable_agg_tids;
451 }
452
453 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
454 unsigned long tfd_queue_mask, u8 ac)
455 {
456 int queue = 0;
457 u8 ac_to_queue[IEEE80211_NUM_ACS];
458 int i;
459
460 lockdep_assert_held(&mvm->queue_info_lock);
461
462 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
463
464 /* See what ACs the existing queues for this STA have */
465 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
466 /* Only DATA queues can be shared */
467 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
468 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
469 continue;
470
471 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
472 }
473
474 /*
475 * The queue to share is chosen only from DATA queues as follows (in
476 * descending priority):
477 * 1. An AC_BE queue
478 * 2. Same AC queue
479 * 3. Highest AC queue that is lower than new AC
480 * 4. Any existing AC (there always is at least 1 DATA queue)
481 */
482
483 /* Priority 1: An AC_BE queue */
484 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
485 queue = ac_to_queue[IEEE80211_AC_BE];
486 /* Priority 2: Same AC queue */
487 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
488 queue = ac_to_queue[ac];
489 /* Priority 3a: If new AC is VO and VI exists - use VI */
490 else if (ac == IEEE80211_AC_VO &&
491 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
492 queue = ac_to_queue[IEEE80211_AC_VI];
493 /* Priority 3b: No BE so only AC less than the new one is BK */
494 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
495 queue = ac_to_queue[IEEE80211_AC_BK];
496 /* Priority 4a: No BE nor BK - use VI if exists */
497 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
498 queue = ac_to_queue[IEEE80211_AC_VI];
499 /* Priority 4b: No BE, BK nor VI - use VO if exists */
500 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
501 queue = ac_to_queue[IEEE80211_AC_VO];
502
503 /* Make sure queue found (or not) is legal */
504 if (!((queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE &&
505 queue <= IWL_MVM_DQA_MAX_MGMT_QUEUE) ||
506 (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE &&
507 queue <= IWL_MVM_DQA_MAX_DATA_QUEUE) ||
508 (queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE))) {
509 IWL_ERR(mvm, "No DATA queues available to share\n");
510 queue = -ENOSPC;
511 }
512
513 return queue;
514 }
515
516 /*
517 * If a given queue has a higher AC than the TID stream that is being added to
518 * it, the queue needs to be redirected to the lower AC. This function does that
519 * in such a case, otherwise - if no redirection required - it does nothing,
520 * unless the %force param is true.
521 */
522 static int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
523 int ac, int ssn, unsigned int wdg_timeout,
524 bool force)
525 {
526 struct iwl_scd_txq_cfg_cmd cmd = {
527 .scd_queue = queue,
528 .enable = 0,
529 };
530 bool shared_queue;
531 unsigned long mq;
532 int ret;
533
534 /*
535 * If the AC is lower than current one - FIFO needs to be redirected to
536 * the lowest one of the streams in the queue. Check if this is needed
537 * here.
538 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
539 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
540 * we need to check if the numerical value of X is LARGER than of Y.
541 */
542 spin_lock_bh(&mvm->queue_info_lock);
543 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
544 spin_unlock_bh(&mvm->queue_info_lock);
545
546 IWL_DEBUG_TX_QUEUES(mvm,
547 "No redirection needed on TXQ #%d\n",
548 queue);
549 return 0;
550 }
551
552 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
553 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
554 mq = mvm->queue_info[queue].hw_queue_to_mac80211;
555 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
556 spin_unlock_bh(&mvm->queue_info_lock);
557
558 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting shared TXQ #%d to FIFO #%d\n",
559 queue, iwl_mvm_ac_to_tx_fifo[ac]);
560
561 /* Stop MAC queues and wait for this queue to empty */
562 iwl_mvm_stop_mac_queues(mvm, mq);
563 ret = iwl_trans_wait_tx_queue_empty(mvm->trans, BIT(queue));
564 if (ret) {
565 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
566 queue);
567 ret = -EIO;
568 goto out;
569 }
570
571 /* Before redirecting the queue we need to de-activate it */
572 iwl_trans_txq_disable(mvm->trans, queue, false);
573 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
574 if (ret)
575 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
576 ret);
577
578 /* Make sure the SCD wrptr is correctly set before reconfiguring */
579 iwl_trans_txq_enable(mvm->trans, queue, iwl_mvm_ac_to_tx_fifo[ac],
580 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
581 ssn, wdg_timeout);
582
583 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
584
585 /* Redirect to lower AC */
586 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
587 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
588 ssn);
589
590 /* Update AC marking of the queue */
591 spin_lock_bh(&mvm->queue_info_lock);
592 mvm->queue_info[queue].mac80211_ac = ac;
593 spin_unlock_bh(&mvm->queue_info_lock);
594
595 /*
596 * Mark queue as shared in transport if shared
597 * Note this has to be done after queue enablement because enablement
598 * can also set this value, and there is no indication there to shared
599 * queues
600 */
601 if (shared_queue)
602 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
603
604 out:
605 /* Continue using the MAC queues */
606 iwl_mvm_start_mac_queues(mvm, mq);
607
608 return ret;
609 }
610
611 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
612 struct ieee80211_sta *sta, u8 ac, int tid,
613 struct ieee80211_hdr *hdr)
614 {
615 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
616 struct iwl_trans_txq_scd_cfg cfg = {
617 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
618 .sta_id = mvmsta->sta_id,
619 .tid = tid,
620 .frame_limit = IWL_FRAME_LIMIT,
621 };
622 unsigned int wdg_timeout =
623 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
624 u8 mac_queue = mvmsta->vif->hw_queue[ac];
625 int queue = -1;
626 bool using_inactive_queue = false;
627 unsigned long disable_agg_tids = 0;
628 enum iwl_mvm_agg_state queue_state;
629 bool shared_queue = false;
630 int ssn;
631 unsigned long tfd_queue_mask;
632 int ret;
633
634 lockdep_assert_held(&mvm->mutex);
635
636 spin_lock_bh(&mvmsta->lock);
637 tfd_queue_mask = mvmsta->tfd_queue_msk;
638 spin_unlock_bh(&mvmsta->lock);
639
640 spin_lock_bh(&mvm->queue_info_lock);
641
642 /*
643 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
644 * exists
645 */
646 if (!ieee80211_is_data_qos(hdr->frame_control) ||
647 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
648 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
649 IWL_MVM_DQA_MIN_MGMT_QUEUE,
650 IWL_MVM_DQA_MAX_MGMT_QUEUE);
651 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
652 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
653 queue);
654
655 /* If no such queue is found, we'll use a DATA queue instead */
656 }
657
658 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
659 (mvm->queue_info[mvmsta->reserved_queue].status ==
660 IWL_MVM_QUEUE_RESERVED ||
661 mvm->queue_info[mvmsta->reserved_queue].status ==
662 IWL_MVM_QUEUE_INACTIVE)) {
663 queue = mvmsta->reserved_queue;
664 mvm->queue_info[queue].reserved = true;
665 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
666 }
667
668 if (queue < 0)
669 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
670 IWL_MVM_DQA_MIN_DATA_QUEUE,
671 IWL_MVM_DQA_MAX_DATA_QUEUE);
672
673 /*
674 * Check if this queue is already allocated but inactive.
675 * In such a case, we'll need to first free this queue before enabling
676 * it again, so we'll mark it as reserved to make sure no new traffic
677 * arrives on it
678 */
679 if (queue > 0 &&
680 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
681 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
682 using_inactive_queue = true;
683 IWL_DEBUG_TX_QUEUES(mvm,
684 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
685 queue, mvmsta->sta_id, tid);
686 }
687
688 /* No free queue - we'll have to share */
689 if (queue <= 0) {
690 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
691 if (queue > 0) {
692 shared_queue = true;
693 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
694 }
695 }
696
697 /*
698 * Mark TXQ as ready, even though it hasn't been fully configured yet,
699 * to make sure no one else takes it.
700 * This will allow avoiding re-acquiring the lock at the end of the
701 * configuration. On error we'll mark it back as free.
702 */
703 if ((queue > 0) && !shared_queue)
704 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
705
706 spin_unlock_bh(&mvm->queue_info_lock);
707
708 /* This shouldn't happen - out of queues */
709 if (WARN_ON(queue <= 0)) {
710 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
711 tid, cfg.sta_id);
712 return -ENOSPC;
713 }
714
715 /*
716 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
717 * but for configuring the SCD to send A-MPDUs we need to mark the queue
718 * as aggregatable.
719 * Mark all DATA queues as allowing to be aggregated at some point
720 */
721 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
722 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
723
724 /*
725 * If this queue was previously inactive (idle) - we need to free it
726 * first
727 */
728 if (using_inactive_queue) {
729 struct iwl_scd_txq_cfg_cmd cmd = {
730 .scd_queue = queue,
731 .enable = 0,
732 };
733 u8 ac;
734
735 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
736
737 spin_lock_bh(&mvm->queue_info_lock);
738 ac = mvm->queue_info[queue].mac80211_ac;
739 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
740 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[ac];
741 spin_unlock_bh(&mvm->queue_info_lock);
742
743 /* Disable the queue */
744 iwl_mvm_invalidate_sta_queue(mvm, queue, disable_agg_tids,
745 true);
746 iwl_trans_txq_disable(mvm->trans, queue, false);
747 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd),
748 &cmd);
749 if (ret) {
750 IWL_ERR(mvm,
751 "Failed to free inactive queue %d (ret=%d)\n",
752 queue, ret);
753
754 /* Re-mark the inactive queue as inactive */
755 spin_lock_bh(&mvm->queue_info_lock);
756 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
757 spin_unlock_bh(&mvm->queue_info_lock);
758
759 return ret;
760 }
761 }
762
763 IWL_DEBUG_TX_QUEUES(mvm,
764 "Allocating %squeue #%d to sta %d on tid %d\n",
765 shared_queue ? "shared " : "", queue,
766 mvmsta->sta_id, tid);
767
768 if (shared_queue) {
769 /* Disable any open aggs on this queue */
770 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
771
772 if (disable_agg_tids) {
773 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
774 queue);
775 iwl_mvm_invalidate_sta_queue(mvm, queue,
776 disable_agg_tids, false);
777 }
778 }
779
780 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
781 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
782 wdg_timeout);
783
784 /*
785 * Mark queue as shared in transport if shared
786 * Note this has to be done after queue enablement because enablement
787 * can also set this value, and there is no indication there to shared
788 * queues
789 */
790 if (shared_queue)
791 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
792
793 spin_lock_bh(&mvmsta->lock);
794 mvmsta->tid_data[tid].txq_id = queue;
795 mvmsta->tid_data[tid].is_tid_active = true;
796 mvmsta->tfd_queue_msk |= BIT(queue);
797 queue_state = mvmsta->tid_data[tid].state;
798
799 if (mvmsta->reserved_queue == queue)
800 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
801 spin_unlock_bh(&mvmsta->lock);
802
803 if (!shared_queue) {
804 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
805 if (ret)
806 goto out_err;
807
808 /* If we need to re-enable aggregations... */
809 if (queue_state == IWL_AGG_ON) {
810 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
811 if (ret)
812 goto out_err;
813 }
814 } else {
815 /* Redirect queue, if needed */
816 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
817 wdg_timeout, false);
818 if (ret)
819 goto out_err;
820 }
821
822 return 0;
823
824 out_err:
825 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
826
827 return ret;
828 }
829
830 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
831 {
832 if (tid == IWL_MAX_TID_COUNT)
833 return IEEE80211_AC_VO; /* MGMT */
834
835 return tid_to_mac80211_ac[tid];
836 }
837
838 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
839 struct ieee80211_sta *sta, int tid)
840 {
841 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
842 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
843 struct sk_buff *skb;
844 struct ieee80211_hdr *hdr;
845 struct sk_buff_head deferred_tx;
846 u8 mac_queue;
847 bool no_queue = false; /* Marks if there is a problem with the queue */
848 u8 ac;
849
850 lockdep_assert_held(&mvm->mutex);
851
852 skb = skb_peek(&tid_data->deferred_tx_frames);
853 if (!skb)
854 return;
855 hdr = (void *)skb->data;
856
857 ac = iwl_mvm_tid_to_ac_queue(tid);
858 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
859
860 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
861 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
862 IWL_ERR(mvm,
863 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
864 mvmsta->sta_id, tid);
865
866 /*
867 * Mark queue as problematic so later the deferred traffic is
868 * freed, as we can do nothing with it
869 */
870 no_queue = true;
871 }
872
873 __skb_queue_head_init(&deferred_tx);
874
875 /* Disable bottom-halves when entering TX path */
876 local_bh_disable();
877 spin_lock(&mvmsta->lock);
878 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
879 spin_unlock(&mvmsta->lock);
880
881 while ((skb = __skb_dequeue(&deferred_tx)))
882 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
883 ieee80211_free_txskb(mvm->hw, skb);
884 local_bh_enable();
885
886 /* Wake queue */
887 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
888 }
889
890 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
891 {
892 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
893 add_stream_wk);
894 struct ieee80211_sta *sta;
895 struct iwl_mvm_sta *mvmsta;
896 unsigned long deferred_tid_traffic;
897 int sta_id, tid;
898
899 /* Check inactivity of queues */
900 iwl_mvm_inactivity_check(mvm);
901
902 mutex_lock(&mvm->mutex);
903
904 /* Go over all stations with deferred traffic */
905 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
906 IWL_MVM_STATION_COUNT) {
907 clear_bit(sta_id, mvm->sta_deferred_frames);
908 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
909 lockdep_is_held(&mvm->mutex));
910 if (IS_ERR_OR_NULL(sta))
911 continue;
912
913 mvmsta = iwl_mvm_sta_from_mac80211(sta);
914 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
915
916 for_each_set_bit(tid, &deferred_tid_traffic,
917 IWL_MAX_TID_COUNT + 1)
918 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
919 }
920
921 mutex_unlock(&mvm->mutex);
922 }
923
924 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
925 struct ieee80211_sta *sta,
926 enum nl80211_iftype vif_type)
927 {
928 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
929 int queue;
930
931 /*
932 * Check for inactive queues, so we don't reach a situation where we
933 * can't add a STA due to a shortage in queues that doesn't really exist
934 */
935 iwl_mvm_inactivity_check(mvm);
936
937 spin_lock_bh(&mvm->queue_info_lock);
938
939 /* Make sure we have free resources for this STA */
940 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
941 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
942 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
943 IWL_MVM_QUEUE_FREE))
944 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
945 else
946 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
947 IWL_MVM_DQA_MIN_DATA_QUEUE,
948 IWL_MVM_DQA_MAX_DATA_QUEUE);
949 if (queue < 0) {
950 spin_unlock_bh(&mvm->queue_info_lock);
951 IWL_ERR(mvm, "No available queues for new station\n");
952 return -ENOSPC;
953 }
954 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
955
956 spin_unlock_bh(&mvm->queue_info_lock);
957
958 mvmsta->reserved_queue = queue;
959
960 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
961 queue, mvmsta->sta_id);
962
963 return 0;
964 }
965
966 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
967 struct ieee80211_vif *vif,
968 struct ieee80211_sta *sta)
969 {
970 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
971 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
972 struct iwl_mvm_rxq_dup_data *dup_data;
973 int i, ret, sta_id;
974
975 lockdep_assert_held(&mvm->mutex);
976
977 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
978 sta_id = iwl_mvm_find_free_sta_id(mvm,
979 ieee80211_vif_type_p2p(vif));
980 else
981 sta_id = mvm_sta->sta_id;
982
983 if (sta_id == IWL_MVM_STATION_COUNT)
984 return -ENOSPC;
985
986 spin_lock_init(&mvm_sta->lock);
987
988 mvm_sta->sta_id = sta_id;
989 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
990 mvmvif->color);
991 mvm_sta->vif = vif;
992 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
993 mvm_sta->tx_protection = 0;
994 mvm_sta->tt_tx_protection = false;
995
996 /* HW restart, don't assume the memory has been zeroed */
997 atomic_set(&mvm->pending_frames[sta_id], 0);
998 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
999 mvm_sta->tfd_queue_msk = 0;
1000
1001 /*
1002 * Allocate new queues for a TDLS station, unless we're in DQA mode,
1003 * and then they'll be allocated dynamically
1004 */
1005 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1006 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1007 if (ret)
1008 return ret;
1009 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1010 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1011 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1012 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1013 }
1014
1015 /* for HW restart - reset everything but the sequence number */
1016 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1017 u16 seq = mvm_sta->tid_data[i].seq_number;
1018 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1019 mvm_sta->tid_data[i].seq_number = seq;
1020
1021 if (!iwl_mvm_is_dqa_supported(mvm))
1022 continue;
1023
1024 /*
1025 * Mark all queues for this STA as unallocated and defer TX
1026 * frames until the queue is allocated
1027 */
1028 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1029 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1030 }
1031 mvm_sta->deferred_traffic_tid_map = 0;
1032 mvm_sta->agg_tids = 0;
1033
1034 if (iwl_mvm_has_new_rx_api(mvm) &&
1035 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1036 dup_data = kcalloc(mvm->trans->num_rx_queues,
1037 sizeof(*dup_data),
1038 GFP_KERNEL);
1039 if (!dup_data)
1040 return -ENOMEM;
1041 mvm_sta->dup_data = dup_data;
1042 }
1043
1044 if (iwl_mvm_is_dqa_supported(mvm)) {
1045 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1046 ieee80211_vif_type_p2p(vif));
1047 if (ret)
1048 goto err;
1049 }
1050
1051 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1052 if (ret)
1053 goto err;
1054
1055 if (vif->type == NL80211_IFTYPE_STATION) {
1056 if (!sta->tdls) {
1057 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
1058 mvmvif->ap_sta_id = sta_id;
1059 } else {
1060 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
1061 }
1062 }
1063
1064 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1065
1066 return 0;
1067
1068 err:
1069 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1070 iwl_mvm_tdls_sta_deinit(mvm, sta);
1071 return ret;
1072 }
1073
1074 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
1075 struct ieee80211_vif *vif,
1076 struct ieee80211_sta *sta)
1077 {
1078 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
1079 }
1080
1081 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1082 bool drain)
1083 {
1084 struct iwl_mvm_add_sta_cmd cmd = {};
1085 int ret;
1086 u32 status;
1087
1088 lockdep_assert_held(&mvm->mutex);
1089
1090 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1091 cmd.sta_id = mvmsta->sta_id;
1092 cmd.add_modify = STA_MODE_MODIFY;
1093 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1094 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1095
1096 status = ADD_STA_SUCCESS;
1097 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1098 iwl_mvm_add_sta_cmd_size(mvm),
1099 &cmd, &status);
1100 if (ret)
1101 return ret;
1102
1103 switch (status & IWL_ADD_STA_STATUS_MASK) {
1104 case ADD_STA_SUCCESS:
1105 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1106 mvmsta->sta_id);
1107 break;
1108 default:
1109 ret = -EIO;
1110 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1111 mvmsta->sta_id);
1112 break;
1113 }
1114
1115 return ret;
1116 }
1117
1118 /*
1119 * Remove a station from the FW table. Before sending the command to remove
1120 * the station validate that the station is indeed known to the driver (sanity
1121 * only).
1122 */
1123 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1124 {
1125 struct ieee80211_sta *sta;
1126 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1127 .sta_id = sta_id,
1128 };
1129 int ret;
1130
1131 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1132 lockdep_is_held(&mvm->mutex));
1133
1134 /* Note: internal stations are marked as error values */
1135 if (!sta) {
1136 IWL_ERR(mvm, "Invalid station id\n");
1137 return -EINVAL;
1138 }
1139
1140 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1141 sizeof(rm_sta_cmd), &rm_sta_cmd);
1142 if (ret) {
1143 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1144 return ret;
1145 }
1146
1147 return 0;
1148 }
1149
1150 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1151 {
1152 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1153 u8 sta_id;
1154
1155 /*
1156 * The mutex is needed because of the SYNC cmd, but not only: if the
1157 * work would run concurrently with iwl_mvm_rm_sta, it would run before
1158 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1159 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1160 * that later.
1161 */
1162 mutex_lock(&mvm->mutex);
1163
1164 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1165 int ret;
1166 struct ieee80211_sta *sta =
1167 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1168 lockdep_is_held(&mvm->mutex));
1169
1170 /*
1171 * This station is in use or RCU-removed; the latter happens in
1172 * managed mode, where mac80211 removes the station before we
1173 * can remove it from firmware (we can only do that after the
1174 * MAC is marked unassociated), and possibly while the deauth
1175 * frame to disconnect from the AP is still queued. Then, the
1176 * station pointer is -ENOENT when the last skb is reclaimed.
1177 */
1178 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1179 continue;
1180
1181 if (PTR_ERR(sta) == -EINVAL) {
1182 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1183 sta_id);
1184 continue;
1185 }
1186
1187 if (!sta) {
1188 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1189 sta_id);
1190 continue;
1191 }
1192
1193 WARN_ON(PTR_ERR(sta) != -EBUSY);
1194 /* This station was removed and we waited until it got drained,
1195 * we can now proceed and remove it.
1196 */
1197 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1198 if (ret) {
1199 IWL_ERR(mvm,
1200 "Couldn't remove sta %d after it was drained\n",
1201 sta_id);
1202 continue;
1203 }
1204 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1205 clear_bit(sta_id, mvm->sta_drained);
1206
1207 if (mvm->tfd_drained[sta_id]) {
1208 unsigned long i, msk = mvm->tfd_drained[sta_id];
1209
1210 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1211 iwl_mvm_disable_txq(mvm, i, i,
1212 IWL_MAX_TID_COUNT, 0);
1213
1214 mvm->tfd_drained[sta_id] = 0;
1215 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1216 sta_id, msk);
1217 }
1218 }
1219
1220 mutex_unlock(&mvm->mutex);
1221 }
1222
1223 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1224 struct ieee80211_vif *vif,
1225 struct iwl_mvm_sta *mvm_sta)
1226 {
1227 int ac;
1228 int i;
1229
1230 lockdep_assert_held(&mvm->mutex);
1231
1232 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1233 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
1234 continue;
1235
1236 ac = iwl_mvm_tid_to_ac_queue(i);
1237 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1238 vif->hw_queue[ac], i, 0);
1239 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
1240 }
1241 }
1242
1243 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1244 struct ieee80211_vif *vif,
1245 struct ieee80211_sta *sta)
1246 {
1247 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1248 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1249 int ret;
1250
1251 lockdep_assert_held(&mvm->mutex);
1252
1253 if (iwl_mvm_has_new_rx_api(mvm))
1254 kfree(mvm_sta->dup_data);
1255
1256 if ((vif->type == NL80211_IFTYPE_STATION &&
1257 mvmvif->ap_sta_id == mvm_sta->sta_id) ||
1258 iwl_mvm_is_dqa_supported(mvm)){
1259 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1260 if (ret)
1261 return ret;
1262 /* flush its queues here since we are freeing mvm_sta */
1263 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
1264 if (ret)
1265 return ret;
1266 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1267 mvm_sta->tfd_queue_msk);
1268 if (ret)
1269 return ret;
1270 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1271
1272 /* If DQA is supported - the queues can be disabled now */
1273 if (iwl_mvm_is_dqa_supported(mvm))
1274 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1275
1276 if (vif->type == NL80211_IFTYPE_STATION &&
1277 mvmvif->ap_sta_id == mvm_sta->sta_id) {
1278 /* if associated - we can't remove the AP STA now */
1279 if (vif->bss_conf.assoc)
1280 return ret;
1281
1282 /* unassoc - go ahead - remove the AP STA now */
1283 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1284
1285 /* clear d0i3_ap_sta_id if no longer relevant */
1286 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
1287 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1288 }
1289 }
1290
1291 /*
1292 * This shouldn't happen - the TDLS channel switch should be canceled
1293 * before the STA is removed.
1294 */
1295 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
1296 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
1297 cancel_delayed_work(&mvm->tdls_cs.dwork);
1298 }
1299
1300 /*
1301 * Make sure that the tx response code sees the station as -EBUSY and
1302 * calls the drain worker.
1303 */
1304 spin_lock_bh(&mvm_sta->lock);
1305 /*
1306 * There are frames pending on the AC queues for this station.
1307 * We need to wait until all the frames are drained...
1308 */
1309 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
1310 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1311 ERR_PTR(-EBUSY));
1312 spin_unlock_bh(&mvm_sta->lock);
1313
1314 /* disable TDLS sta queues on drain complete */
1315 if (sta->tdls) {
1316 mvm->tfd_drained[mvm_sta->sta_id] =
1317 mvm_sta->tfd_queue_msk;
1318 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
1319 mvm_sta->sta_id);
1320 }
1321
1322 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1323 } else {
1324 spin_unlock_bh(&mvm_sta->lock);
1325
1326 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1327 iwl_mvm_tdls_sta_deinit(mvm, sta);
1328
1329 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1330 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1331 }
1332
1333 return ret;
1334 }
1335
1336 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1337 struct ieee80211_vif *vif,
1338 u8 sta_id)
1339 {
1340 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1341
1342 lockdep_assert_held(&mvm->mutex);
1343
1344 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1345 return ret;
1346 }
1347
1348 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1349 struct iwl_mvm_int_sta *sta,
1350 u32 qmask, enum nl80211_iftype iftype)
1351 {
1352 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1353 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1354 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
1355 return -ENOSPC;
1356 }
1357
1358 sta->tfd_queue_msk = qmask;
1359
1360 /* put a non-NULL value so iterating over the stations won't stop */
1361 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1362 return 0;
1363 }
1364
1365 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
1366 struct iwl_mvm_int_sta *sta)
1367 {
1368 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1369 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1370 sta->sta_id = IWL_MVM_STATION_COUNT;
1371 }
1372
1373 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1374 struct iwl_mvm_int_sta *sta,
1375 const u8 *addr,
1376 u16 mac_id, u16 color)
1377 {
1378 struct iwl_mvm_add_sta_cmd cmd;
1379 int ret;
1380 u32 status;
1381
1382 lockdep_assert_held(&mvm->mutex);
1383
1384 memset(&cmd, 0, sizeof(cmd));
1385 cmd.sta_id = sta->sta_id;
1386 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1387 color));
1388
1389 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1390 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1391
1392 if (addr)
1393 memcpy(cmd.addr, addr, ETH_ALEN);
1394
1395 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1396 iwl_mvm_add_sta_cmd_size(mvm),
1397 &cmd, &status);
1398 if (ret)
1399 return ret;
1400
1401 switch (status & IWL_ADD_STA_STATUS_MASK) {
1402 case ADD_STA_SUCCESS:
1403 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1404 return 0;
1405 default:
1406 ret = -EIO;
1407 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1408 status);
1409 break;
1410 }
1411 return ret;
1412 }
1413
1414 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1415 {
1416 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1417 mvm->cfg->base_params->wd_timeout :
1418 IWL_WATCHDOG_DISABLED;
1419 int ret;
1420
1421 lockdep_assert_held(&mvm->mutex);
1422
1423 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1424 if (!iwl_mvm_is_dqa_supported(mvm))
1425 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1426 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1427
1428 /* Allocate aux station and assign to it the aux queue */
1429 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1430 NL80211_IFTYPE_UNSPECIFIED);
1431 if (ret)
1432 return ret;
1433
1434 if (iwl_mvm_is_dqa_supported(mvm)) {
1435 struct iwl_trans_txq_scd_cfg cfg = {
1436 .fifo = IWL_MVM_TX_FIFO_MCAST,
1437 .sta_id = mvm->aux_sta.sta_id,
1438 .tid = IWL_MAX_TID_COUNT,
1439 .aggregate = false,
1440 .frame_limit = IWL_FRAME_LIMIT,
1441 };
1442
1443 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1444 wdg_timeout);
1445 }
1446
1447 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1448 MAC_INDEX_AUX, 0);
1449
1450 if (ret)
1451 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1452 return ret;
1453 }
1454
1455 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1456 {
1457 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1458
1459 lockdep_assert_held(&mvm->mutex);
1460 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1461 mvmvif->id, 0);
1462 }
1463
1464 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1465 {
1466 int ret;
1467
1468 lockdep_assert_held(&mvm->mutex);
1469
1470 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1471 if (ret)
1472 IWL_WARN(mvm, "Failed sending remove station\n");
1473
1474 return ret;
1475 }
1476
1477 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1478 {
1479 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1480 }
1481
1482 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1483 {
1484 lockdep_assert_held(&mvm->mutex);
1485
1486 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1487 }
1488
1489 /*
1490 * Send the add station command for the vif's broadcast station.
1491 * Assumes that the station was already allocated.
1492 *
1493 * @mvm: the mvm component
1494 * @vif: the interface to which the broadcast station is added
1495 * @bsta: the broadcast station to add.
1496 */
1497 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1498 {
1499 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1500 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1501 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1502 const u8 *baddr = _baddr;
1503
1504 lockdep_assert_held(&mvm->mutex);
1505
1506 if (iwl_mvm_is_dqa_supported(mvm)) {
1507 struct iwl_trans_txq_scd_cfg cfg = {
1508 .fifo = IWL_MVM_TX_FIFO_VO,
1509 .sta_id = mvmvif->bcast_sta.sta_id,
1510 .tid = IWL_MAX_TID_COUNT,
1511 .aggregate = false,
1512 .frame_limit = IWL_FRAME_LIMIT,
1513 };
1514 unsigned int wdg_timeout =
1515 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1516 int queue;
1517
1518 if ((vif->type == NL80211_IFTYPE_AP) &&
1519 (mvmvif->bcast_sta.tfd_queue_msk &
1520 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1521 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1522 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1523 (mvmvif->bcast_sta.tfd_queue_msk &
1524 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1525 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1526 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1527 return -EINVAL;
1528
1529 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1530 wdg_timeout);
1531 }
1532
1533 if (vif->type == NL80211_IFTYPE_ADHOC)
1534 baddr = vif->bss_conf.bssid;
1535
1536 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1537 return -ENOSPC;
1538
1539 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1540 mvmvif->id, mvmvif->color);
1541 }
1542
1543 /* Send the FW a request to remove the station from it's internal data
1544 * structures, but DO NOT remove the entry from the local data structures. */
1545 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1546 {
1547 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1548 int ret;
1549
1550 lockdep_assert_held(&mvm->mutex);
1551
1552 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1553 if (ret)
1554 IWL_WARN(mvm, "Failed sending remove station\n");
1555 return ret;
1556 }
1557
1558 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1559 {
1560 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1561 u32 qmask = 0;
1562
1563 lockdep_assert_held(&mvm->mutex);
1564
1565 if (!iwl_mvm_is_dqa_supported(mvm))
1566 qmask = iwl_mvm_mac_get_queues_mask(vif);
1567
1568 if (vif->type == NL80211_IFTYPE_AP) {
1569 /*
1570 * The firmware defines the TFD queue mask to only be relevant
1571 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1572 * be included.
1573 */
1574 qmask &= ~BIT(vif->cab_queue);
1575
1576 if (iwl_mvm_is_dqa_supported(mvm))
1577 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1578 } else if (iwl_mvm_is_dqa_supported(mvm) &&
1579 vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1580 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1581 }
1582
1583 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1584 ieee80211_vif_type_p2p(vif));
1585 }
1586
1587 /* Allocate a new station entry for the broadcast station to the given vif,
1588 * and send it to the FW.
1589 * Note that each P2P mac should have its own broadcast station.
1590 *
1591 * @mvm: the mvm component
1592 * @vif: the interface to which the broadcast station is added
1593 * @bsta: the broadcast station to add. */
1594 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1595 {
1596 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1597 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1598 int ret;
1599
1600 lockdep_assert_held(&mvm->mutex);
1601
1602 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1603 if (ret)
1604 return ret;
1605
1606 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1607
1608 if (ret)
1609 iwl_mvm_dealloc_int_sta(mvm, bsta);
1610
1611 return ret;
1612 }
1613
1614 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1615 {
1616 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1617
1618 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1619 }
1620
1621 /*
1622 * Send the FW a request to remove the station from it's internal data
1623 * structures, and in addition remove it from the local data structure.
1624 */
1625 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1626 {
1627 int ret;
1628
1629 lockdep_assert_held(&mvm->mutex);
1630
1631 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1632
1633 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1634
1635 return ret;
1636 }
1637
1638 #define IWL_MAX_RX_BA_SESSIONS 16
1639
1640 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1641 {
1642 struct iwl_mvm_delba_notif notif = {
1643 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1644 .metadata.sync = 1,
1645 .delba.baid = baid,
1646 };
1647 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1648 };
1649
1650 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1651 struct iwl_mvm_baid_data *data)
1652 {
1653 int i;
1654
1655 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1656
1657 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1658 int j;
1659 struct iwl_mvm_reorder_buffer *reorder_buf =
1660 &data->reorder_buf[i];
1661
1662 spin_lock_bh(&reorder_buf->lock);
1663 if (likely(!reorder_buf->num_stored)) {
1664 spin_unlock_bh(&reorder_buf->lock);
1665 continue;
1666 }
1667
1668 /*
1669 * This shouldn't happen in regular DELBA since the internal
1670 * delBA notification should trigger a release of all frames in
1671 * the reorder buffer.
1672 */
1673 WARN_ON(1);
1674
1675 for (j = 0; j < reorder_buf->buf_size; j++)
1676 __skb_queue_purge(&reorder_buf->entries[j]);
1677 /*
1678 * Prevent timer re-arm. This prevents a very far fetched case
1679 * where we timed out on the notification. There may be prior
1680 * RX frames pending in the RX queue before the notification
1681 * that might get processed between now and the actual deletion
1682 * and we would re-arm the timer although we are deleting the
1683 * reorder buffer.
1684 */
1685 reorder_buf->removed = true;
1686 spin_unlock_bh(&reorder_buf->lock);
1687 del_timer_sync(&reorder_buf->reorder_timer);
1688 }
1689 }
1690
1691 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1692 u32 sta_id,
1693 struct iwl_mvm_baid_data *data,
1694 u16 ssn, u8 buf_size)
1695 {
1696 int i;
1697
1698 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1699 struct iwl_mvm_reorder_buffer *reorder_buf =
1700 &data->reorder_buf[i];
1701 int j;
1702
1703 reorder_buf->num_stored = 0;
1704 reorder_buf->head_sn = ssn;
1705 reorder_buf->buf_size = buf_size;
1706 /* rx reorder timer */
1707 reorder_buf->reorder_timer.function =
1708 iwl_mvm_reorder_timer_expired;
1709 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1710 init_timer(&reorder_buf->reorder_timer);
1711 spin_lock_init(&reorder_buf->lock);
1712 reorder_buf->mvm = mvm;
1713 reorder_buf->queue = i;
1714 reorder_buf->sta_id = sta_id;
1715 for (j = 0; j < reorder_buf->buf_size; j++)
1716 __skb_queue_head_init(&reorder_buf->entries[j]);
1717 }
1718 }
1719
1720 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1721 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1722 {
1723 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1724 struct iwl_mvm_add_sta_cmd cmd = {};
1725 struct iwl_mvm_baid_data *baid_data = NULL;
1726 int ret;
1727 u32 status;
1728
1729 lockdep_assert_held(&mvm->mutex);
1730
1731 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1732 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1733 return -ENOSPC;
1734 }
1735
1736 if (iwl_mvm_has_new_rx_api(mvm) && start) {
1737 /*
1738 * Allocate here so if allocation fails we can bail out early
1739 * before starting the BA session in the firmware
1740 */
1741 baid_data = kzalloc(sizeof(*baid_data) +
1742 mvm->trans->num_rx_queues *
1743 sizeof(baid_data->reorder_buf[0]),
1744 GFP_KERNEL);
1745 if (!baid_data)
1746 return -ENOMEM;
1747 }
1748
1749 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1750 cmd.sta_id = mvm_sta->sta_id;
1751 cmd.add_modify = STA_MODE_MODIFY;
1752 if (start) {
1753 cmd.add_immediate_ba_tid = (u8) tid;
1754 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1755 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1756 } else {
1757 cmd.remove_immediate_ba_tid = (u8) tid;
1758 }
1759 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1760 STA_MODIFY_REMOVE_BA_TID;
1761
1762 status = ADD_STA_SUCCESS;
1763 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1764 iwl_mvm_add_sta_cmd_size(mvm),
1765 &cmd, &status);
1766 if (ret)
1767 goto out_free;
1768
1769 switch (status & IWL_ADD_STA_STATUS_MASK) {
1770 case ADD_STA_SUCCESS:
1771 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
1772 start ? "start" : "stopp");
1773 break;
1774 case ADD_STA_IMMEDIATE_BA_FAILURE:
1775 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1776 ret = -ENOSPC;
1777 break;
1778 default:
1779 ret = -EIO;
1780 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1781 start ? "start" : "stopp", status);
1782 break;
1783 }
1784
1785 if (ret)
1786 goto out_free;
1787
1788 if (start) {
1789 u8 baid;
1790
1791 mvm->rx_ba_sessions++;
1792
1793 if (!iwl_mvm_has_new_rx_api(mvm))
1794 return 0;
1795
1796 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1797 ret = -EINVAL;
1798 goto out_free;
1799 }
1800 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1801 IWL_ADD_STA_BAID_SHIFT);
1802 baid_data->baid = baid;
1803 baid_data->timeout = timeout;
1804 baid_data->last_rx = jiffies;
1805 init_timer(&baid_data->session_timer);
1806 baid_data->session_timer.function =
1807 iwl_mvm_rx_agg_session_expired;
1808 baid_data->session_timer.data =
1809 (unsigned long)&mvm->baid_map[baid];
1810 baid_data->mvm = mvm;
1811 baid_data->tid = tid;
1812 baid_data->sta_id = mvm_sta->sta_id;
1813
1814 mvm_sta->tid_to_baid[tid] = baid;
1815 if (timeout)
1816 mod_timer(&baid_data->session_timer,
1817 TU_TO_EXP_TIME(timeout * 2));
1818
1819 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1820 baid_data, ssn, buf_size);
1821 /*
1822 * protect the BA data with RCU to cover a case where our
1823 * internal RX sync mechanism will timeout (not that it's
1824 * supposed to happen) and we will free the session data while
1825 * RX is being processed in parallel
1826 */
1827 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
1828 mvm_sta->sta_id, tid, baid);
1829 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1830 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1831 } else {
1832 u8 baid = mvm_sta->tid_to_baid[tid];
1833
1834 if (mvm->rx_ba_sessions > 0)
1835 /* check that restart flow didn't zero the counter */
1836 mvm->rx_ba_sessions--;
1837 if (!iwl_mvm_has_new_rx_api(mvm))
1838 return 0;
1839
1840 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1841 return -EINVAL;
1842
1843 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1844 if (WARN_ON(!baid_data))
1845 return -EINVAL;
1846
1847 /* synchronize all rx queues so we can safely delete */
1848 iwl_mvm_free_reorder(mvm, baid_data);
1849 del_timer_sync(&baid_data->session_timer);
1850 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1851 kfree_rcu(baid_data, rcu_head);
1852 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
1853 }
1854 return 0;
1855
1856 out_free:
1857 kfree(baid_data);
1858 return ret;
1859 }
1860
1861 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1862 int tid, u8 queue, bool start)
1863 {
1864 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1865 struct iwl_mvm_add_sta_cmd cmd = {};
1866 int ret;
1867 u32 status;
1868
1869 lockdep_assert_held(&mvm->mutex);
1870
1871 if (start) {
1872 mvm_sta->tfd_queue_msk |= BIT(queue);
1873 mvm_sta->tid_disable_agg &= ~BIT(tid);
1874 } else {
1875 /* In DQA-mode the queue isn't removed on agg termination */
1876 if (!iwl_mvm_is_dqa_supported(mvm))
1877 mvm_sta->tfd_queue_msk &= ~BIT(queue);
1878 mvm_sta->tid_disable_agg |= BIT(tid);
1879 }
1880
1881 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1882 cmd.sta_id = mvm_sta->sta_id;
1883 cmd.add_modify = STA_MODE_MODIFY;
1884 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1885 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1886 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1887
1888 status = ADD_STA_SUCCESS;
1889 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1890 iwl_mvm_add_sta_cmd_size(mvm),
1891 &cmd, &status);
1892 if (ret)
1893 return ret;
1894
1895 switch (status & IWL_ADD_STA_STATUS_MASK) {
1896 case ADD_STA_SUCCESS:
1897 break;
1898 default:
1899 ret = -EIO;
1900 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1901 start ? "start" : "stopp", status);
1902 break;
1903 }
1904
1905 return ret;
1906 }
1907
1908 const u8 tid_to_mac80211_ac[] = {
1909 IEEE80211_AC_BE,
1910 IEEE80211_AC_BK,
1911 IEEE80211_AC_BK,
1912 IEEE80211_AC_BE,
1913 IEEE80211_AC_VI,
1914 IEEE80211_AC_VI,
1915 IEEE80211_AC_VO,
1916 IEEE80211_AC_VO,
1917 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
1918 };
1919
1920 static const u8 tid_to_ucode_ac[] = {
1921 AC_BE,
1922 AC_BK,
1923 AC_BK,
1924 AC_BE,
1925 AC_VI,
1926 AC_VI,
1927 AC_VO,
1928 AC_VO,
1929 };
1930
1931 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1932 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1933 {
1934 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1935 struct iwl_mvm_tid_data *tid_data;
1936 int txq_id;
1937 int ret;
1938
1939 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1940 return -EINVAL;
1941
1942 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1943 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1944 mvmsta->tid_data[tid].state);
1945 return -ENXIO;
1946 }
1947
1948 lockdep_assert_held(&mvm->mutex);
1949
1950 spin_lock_bh(&mvmsta->lock);
1951
1952 /* possible race condition - we entered D0i3 while starting agg */
1953 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1954 spin_unlock_bh(&mvmsta->lock);
1955 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1956 return -EIO;
1957 }
1958
1959 spin_lock_bh(&mvm->queue_info_lock);
1960
1961 /*
1962 * Note the possible cases:
1963 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
1964 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
1965 * one and mark it as reserved
1966 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
1967 * non-DQA mode, since the TXQ hasn't yet been allocated
1968 */
1969 txq_id = mvmsta->tid_data[tid].txq_id;
1970 if (!iwl_mvm_is_dqa_supported(mvm) ||
1971 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1972 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1973 mvm->first_agg_queue,
1974 mvm->last_agg_queue);
1975 if (txq_id < 0) {
1976 ret = txq_id;
1977 spin_unlock_bh(&mvm->queue_info_lock);
1978 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1979 goto release_locks;
1980 }
1981
1982 /* TXQ hasn't yet been enabled, so mark it only as reserved */
1983 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
1984 }
1985 spin_unlock_bh(&mvm->queue_info_lock);
1986
1987 IWL_DEBUG_TX_QUEUES(mvm,
1988 "AGG for tid %d will be on queue #%d\n",
1989 tid, txq_id);
1990
1991 tid_data = &mvmsta->tid_data[tid];
1992 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1993 tid_data->txq_id = txq_id;
1994 *ssn = tid_data->ssn;
1995
1996 IWL_DEBUG_TX_QUEUES(mvm,
1997 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1998 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1999 tid_data->next_reclaimed);
2000
2001 if (tid_data->ssn == tid_data->next_reclaimed) {
2002 tid_data->state = IWL_AGG_STARTING;
2003 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2004 } else {
2005 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2006 }
2007
2008 ret = 0;
2009
2010 release_locks:
2011 spin_unlock_bh(&mvmsta->lock);
2012
2013 return ret;
2014 }
2015
2016 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2017 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2018 bool amsdu)
2019 {
2020 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2021 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2022 unsigned int wdg_timeout =
2023 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2024 int queue, ret;
2025 bool alloc_queue = true;
2026 u16 ssn;
2027
2028 struct iwl_trans_txq_scd_cfg cfg = {
2029 .sta_id = mvmsta->sta_id,
2030 .tid = tid,
2031 .frame_limit = buf_size,
2032 .aggregate = true,
2033 };
2034
2035 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2036 != IWL_MAX_TID_COUNT);
2037
2038 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2039
2040 spin_lock_bh(&mvmsta->lock);
2041 ssn = tid_data->ssn;
2042 queue = tid_data->txq_id;
2043 tid_data->state = IWL_AGG_ON;
2044 mvmsta->agg_tids |= BIT(tid);
2045 tid_data->ssn = 0xffff;
2046 tid_data->amsdu_in_ampdu_allowed = amsdu;
2047 spin_unlock_bh(&mvmsta->lock);
2048
2049 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2050
2051 /* In DQA mode, the existing queue might need to be reconfigured */
2052 if (iwl_mvm_is_dqa_supported(mvm)) {
2053 spin_lock_bh(&mvm->queue_info_lock);
2054 /* Maybe there is no need to even alloc a queue... */
2055 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2056 alloc_queue = false;
2057 spin_unlock_bh(&mvm->queue_info_lock);
2058
2059 /*
2060 * Only reconfig the SCD for the queue if the window size has
2061 * changed from current (become smaller)
2062 */
2063 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2064 /*
2065 * If reconfiguring an existing queue, it first must be
2066 * drained
2067 */
2068 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
2069 BIT(queue));
2070 if (ret) {
2071 IWL_ERR(mvm,
2072 "Error draining queue before reconfig\n");
2073 return ret;
2074 }
2075
2076 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2077 mvmsta->sta_id, tid,
2078 buf_size, ssn);
2079 if (ret) {
2080 IWL_ERR(mvm,
2081 "Error reconfiguring TXQ #%d\n", queue);
2082 return ret;
2083 }
2084 }
2085 }
2086
2087 if (alloc_queue)
2088 iwl_mvm_enable_txq(mvm, queue,
2089 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2090 &cfg, wdg_timeout);
2091
2092 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2093 if (ret)
2094 return -EIO;
2095
2096 /* No need to mark as reserved */
2097 spin_lock_bh(&mvm->queue_info_lock);
2098 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2099 spin_unlock_bh(&mvm->queue_info_lock);
2100
2101 /*
2102 * Even though in theory the peer could have different
2103 * aggregation reorder buffer sizes for different sessions,
2104 * our ucode doesn't allow for that and has a global limit
2105 * for each station. Therefore, use the minimum of all the
2106 * aggregation sessions and our default value.
2107 */
2108 mvmsta->max_agg_bufsize =
2109 min(mvmsta->max_agg_bufsize, buf_size);
2110 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2111
2112 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2113 sta->addr, tid);
2114
2115 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2116 }
2117
2118 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2119 struct ieee80211_sta *sta, u16 tid)
2120 {
2121 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2122 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2123 u16 txq_id;
2124 int err;
2125
2126
2127 /*
2128 * If mac80211 is cleaning its state, then say that we finished since
2129 * our state has been cleared anyway.
2130 */
2131 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2132 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2133 return 0;
2134 }
2135
2136 spin_lock_bh(&mvmsta->lock);
2137
2138 txq_id = tid_data->txq_id;
2139
2140 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2141 mvmsta->sta_id, tid, txq_id, tid_data->state);
2142
2143 mvmsta->agg_tids &= ~BIT(tid);
2144
2145 spin_lock_bh(&mvm->queue_info_lock);
2146 /*
2147 * The TXQ is marked as reserved only if no traffic came through yet
2148 * This means no traffic has been sent on this TID (agg'd or not), so
2149 * we no longer have use for the queue. Since it hasn't even been
2150 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2151 * free.
2152 */
2153 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2154 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2155 spin_unlock_bh(&mvm->queue_info_lock);
2156
2157 switch (tid_data->state) {
2158 case IWL_AGG_ON:
2159 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2160
2161 IWL_DEBUG_TX_QUEUES(mvm,
2162 "ssn = %d, next_recl = %d\n",
2163 tid_data->ssn, tid_data->next_reclaimed);
2164
2165 /* There are still packets for this RA / TID in the HW */
2166 if (tid_data->ssn != tid_data->next_reclaimed) {
2167 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2168 err = 0;
2169 break;
2170 }
2171
2172 tid_data->ssn = 0xffff;
2173 tid_data->state = IWL_AGG_OFF;
2174 spin_unlock_bh(&mvmsta->lock);
2175
2176 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2177
2178 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2179
2180 if (!iwl_mvm_is_dqa_supported(mvm)) {
2181 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2182
2183 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2184 }
2185 return 0;
2186 case IWL_AGG_STARTING:
2187 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2188 /*
2189 * The agg session has been stopped before it was set up. This
2190 * can happen when the AddBA timer times out for example.
2191 */
2192
2193 /* No barriers since we are under mutex */
2194 lockdep_assert_held(&mvm->mutex);
2195
2196 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2197 tid_data->state = IWL_AGG_OFF;
2198 err = 0;
2199 break;
2200 default:
2201 IWL_ERR(mvm,
2202 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2203 mvmsta->sta_id, tid, tid_data->state);
2204 IWL_ERR(mvm,
2205 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2206 err = -EINVAL;
2207 }
2208
2209 spin_unlock_bh(&mvmsta->lock);
2210
2211 return err;
2212 }
2213
2214 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2215 struct ieee80211_sta *sta, u16 tid)
2216 {
2217 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2218 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2219 u16 txq_id;
2220 enum iwl_mvm_agg_state old_state;
2221
2222 /*
2223 * First set the agg state to OFF to avoid calling
2224 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2225 */
2226 spin_lock_bh(&mvmsta->lock);
2227 txq_id = tid_data->txq_id;
2228 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2229 mvmsta->sta_id, tid, txq_id, tid_data->state);
2230 old_state = tid_data->state;
2231 tid_data->state = IWL_AGG_OFF;
2232 mvmsta->agg_tids &= ~BIT(tid);
2233 spin_unlock_bh(&mvmsta->lock);
2234
2235 spin_lock_bh(&mvm->queue_info_lock);
2236 /*
2237 * The TXQ is marked as reserved only if no traffic came through yet
2238 * This means no traffic has been sent on this TID (agg'd or not), so
2239 * we no longer have use for the queue. Since it hasn't even been
2240 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2241 * free.
2242 */
2243 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2244 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2245 spin_unlock_bh(&mvm->queue_info_lock);
2246
2247 if (old_state >= IWL_AGG_ON) {
2248 iwl_mvm_drain_sta(mvm, mvmsta, true);
2249 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2250 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2251 iwl_trans_wait_tx_queue_empty(mvm->trans,
2252 mvmsta->tfd_queue_msk);
2253 iwl_mvm_drain_sta(mvm, mvmsta, false);
2254
2255 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2256
2257 if (!iwl_mvm_is_dqa_supported(mvm)) {
2258 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2259
2260 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2261 tid, 0);
2262 }
2263 }
2264
2265 return 0;
2266 }
2267
2268 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2269 {
2270 int i, max = -1, max_offs = -1;
2271
2272 lockdep_assert_held(&mvm->mutex);
2273
2274 /* Pick the unused key offset with the highest 'deleted'
2275 * counter. Every time a key is deleted, all the counters
2276 * are incremented and the one that was just deleted is
2277 * reset to zero. Thus, the highest counter is the one
2278 * that was deleted longest ago. Pick that one.
2279 */
2280 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2281 if (test_bit(i, mvm->fw_key_table))
2282 continue;
2283 if (mvm->fw_key_deleted[i] > max) {
2284 max = mvm->fw_key_deleted[i];
2285 max_offs = i;
2286 }
2287 }
2288
2289 if (max_offs < 0)
2290 return STA_KEY_IDX_INVALID;
2291
2292 return max_offs;
2293 }
2294
2295 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2296 struct ieee80211_vif *vif,
2297 struct ieee80211_sta *sta)
2298 {
2299 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2300
2301 if (sta)
2302 return iwl_mvm_sta_from_mac80211(sta);
2303
2304 /*
2305 * The device expects GTKs for station interfaces to be
2306 * installed as GTKs for the AP station. If we have no
2307 * station ID, then use AP's station ID.
2308 */
2309 if (vif->type == NL80211_IFTYPE_STATION &&
2310 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2311 u8 sta_id = mvmvif->ap_sta_id;
2312
2313 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2314 lockdep_is_held(&mvm->mutex));
2315
2316 /*
2317 * It is possible that the 'sta' parameter is NULL,
2318 * for example when a GTK is removed - the sta_id will then
2319 * be the AP ID, and no station was passed by mac80211.
2320 */
2321 if (IS_ERR_OR_NULL(sta))
2322 return NULL;
2323
2324 return iwl_mvm_sta_from_mac80211(sta);
2325 }
2326
2327 return NULL;
2328 }
2329
2330 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2331 struct iwl_mvm_sta *mvm_sta,
2332 struct ieee80211_key_conf *keyconf, bool mcast,
2333 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2334 u8 key_offset)
2335 {
2336 struct iwl_mvm_add_sta_key_cmd cmd = {};
2337 __le16 key_flags;
2338 int ret;
2339 u32 status;
2340 u16 keyidx;
2341 int i;
2342 u8 sta_id = mvm_sta->sta_id;
2343
2344 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2345 STA_KEY_FLG_KEYID_MSK;
2346 key_flags = cpu_to_le16(keyidx);
2347 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2348
2349 switch (keyconf->cipher) {
2350 case WLAN_CIPHER_SUITE_TKIP:
2351 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2352 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
2353 for (i = 0; i < 5; i++)
2354 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
2355 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2356 break;
2357 case WLAN_CIPHER_SUITE_CCMP:
2358 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2359 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2360 break;
2361 case WLAN_CIPHER_SUITE_WEP104:
2362 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2363 /* fall through */
2364 case WLAN_CIPHER_SUITE_WEP40:
2365 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2366 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
2367 break;
2368 case WLAN_CIPHER_SUITE_GCMP_256:
2369 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2370 /* fall through */
2371 case WLAN_CIPHER_SUITE_GCMP:
2372 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2373 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2374 break;
2375 default:
2376 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2377 memcpy(cmd.key, keyconf->key, keyconf->keylen);
2378 }
2379
2380 if (mcast)
2381 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2382
2383 cmd.key_offset = key_offset;
2384 cmd.key_flags = key_flags;
2385 cmd.sta_id = sta_id;
2386
2387 status = ADD_STA_SUCCESS;
2388 if (cmd_flags & CMD_ASYNC)
2389 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
2390 sizeof(cmd), &cmd);
2391 else
2392 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2393 &cmd, &status);
2394
2395 switch (status) {
2396 case ADD_STA_SUCCESS:
2397 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2398 break;
2399 default:
2400 ret = -EIO;
2401 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
2402 break;
2403 }
2404
2405 return ret;
2406 }
2407
2408 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
2409 struct ieee80211_key_conf *keyconf,
2410 u8 sta_id, bool remove_key)
2411 {
2412 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
2413
2414 /* verify the key details match the required command's expectations */
2415 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
2416 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
2417 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
2418 return -EINVAL;
2419
2420 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
2421 igtk_cmd.sta_id = cpu_to_le32(sta_id);
2422
2423 if (remove_key) {
2424 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
2425 } else {
2426 struct ieee80211_key_seq seq;
2427 const u8 *pn;
2428
2429 switch (keyconf->cipher) {
2430 case WLAN_CIPHER_SUITE_AES_CMAC:
2431 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
2432 break;
2433 default:
2434 return -EINVAL;
2435 }
2436
2437 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
2438 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2439 pn = seq.aes_cmac.pn;
2440 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
2441 ((u64) pn[4] << 8) |
2442 ((u64) pn[3] << 16) |
2443 ((u64) pn[2] << 24) |
2444 ((u64) pn[1] << 32) |
2445 ((u64) pn[0] << 40));
2446 }
2447
2448 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
2449 remove_key ? "removing" : "installing",
2450 igtk_cmd.sta_id);
2451
2452 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
2453 sizeof(igtk_cmd), &igtk_cmd);
2454 }
2455
2456
2457 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
2458 struct ieee80211_vif *vif,
2459 struct ieee80211_sta *sta)
2460 {
2461 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2462
2463 if (sta)
2464 return sta->addr;
2465
2466 if (vif->type == NL80211_IFTYPE_STATION &&
2467 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2468 u8 sta_id = mvmvif->ap_sta_id;
2469 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2470 lockdep_is_held(&mvm->mutex));
2471 return sta->addr;
2472 }
2473
2474
2475 return NULL;
2476 }
2477
2478 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2479 struct ieee80211_vif *vif,
2480 struct ieee80211_sta *sta,
2481 struct ieee80211_key_conf *keyconf,
2482 u8 key_offset,
2483 bool mcast)
2484 {
2485 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2486 int ret;
2487 const u8 *addr;
2488 struct ieee80211_key_seq seq;
2489 u16 p1k[5];
2490
2491 switch (keyconf->cipher) {
2492 case WLAN_CIPHER_SUITE_TKIP:
2493 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2494 /* get phase 1 key from mac80211 */
2495 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2496 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2497 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2498 seq.tkip.iv32, p1k, 0, key_offset);
2499 break;
2500 case WLAN_CIPHER_SUITE_CCMP:
2501 case WLAN_CIPHER_SUITE_WEP40:
2502 case WLAN_CIPHER_SUITE_WEP104:
2503 case WLAN_CIPHER_SUITE_GCMP:
2504 case WLAN_CIPHER_SUITE_GCMP_256:
2505 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2506 0, NULL, 0, key_offset);
2507 break;
2508 default:
2509 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2510 0, NULL, 0, key_offset);
2511 }
2512
2513 return ret;
2514 }
2515
2516 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2517 struct ieee80211_key_conf *keyconf,
2518 bool mcast)
2519 {
2520 struct iwl_mvm_add_sta_key_cmd cmd = {};
2521 __le16 key_flags;
2522 int ret;
2523 u32 status;
2524
2525 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2526 STA_KEY_FLG_KEYID_MSK);
2527 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2528 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2529
2530 if (mcast)
2531 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2532
2533 cmd.key_flags = key_flags;
2534 cmd.key_offset = keyconf->hw_key_idx;
2535 cmd.sta_id = sta_id;
2536
2537 status = ADD_STA_SUCCESS;
2538 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2539 &cmd, &status);
2540
2541 switch (status) {
2542 case ADD_STA_SUCCESS:
2543 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2544 break;
2545 default:
2546 ret = -EIO;
2547 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2548 break;
2549 }
2550
2551 return ret;
2552 }
2553
2554 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2555 struct ieee80211_vif *vif,
2556 struct ieee80211_sta *sta,
2557 struct ieee80211_key_conf *keyconf,
2558 u8 key_offset)
2559 {
2560 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2561 struct iwl_mvm_sta *mvm_sta;
2562 u8 sta_id;
2563 int ret;
2564 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2565
2566 lockdep_assert_held(&mvm->mutex);
2567
2568 /* Get the station id from the mvm local station table */
2569 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2570 if (!mvm_sta) {
2571 IWL_ERR(mvm, "Failed to find station\n");
2572 return -EINVAL;
2573 }
2574 sta_id = mvm_sta->sta_id;
2575
2576 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2577 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2578 goto end;
2579 }
2580
2581 /*
2582 * It is possible that the 'sta' parameter is NULL, and thus
2583 * there is a need to retrieve the sta from the local station table.
2584 */
2585 if (!sta) {
2586 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2587 lockdep_is_held(&mvm->mutex));
2588 if (IS_ERR_OR_NULL(sta)) {
2589 IWL_ERR(mvm, "Invalid station id\n");
2590 return -EINVAL;
2591 }
2592 }
2593
2594 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2595 return -EINVAL;
2596
2597 /* If the key_offset is not pre-assigned, we need to find a
2598 * new offset to use. In normal cases, the offset is not
2599 * pre-assigned, but during HW_RESTART we want to reuse the
2600 * same indices, so we pass them when this function is called.
2601 *
2602 * In D3 entry, we need to hardcoded the indices (because the
2603 * firmware hardcodes the PTK offset to 0). In this case, we
2604 * need to make sure we don't overwrite the hw_key_idx in the
2605 * keyconf structure, because otherwise we cannot configure
2606 * the original ones back when resuming.
2607 */
2608 if (key_offset == STA_KEY_IDX_INVALID) {
2609 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2610 if (key_offset == STA_KEY_IDX_INVALID)
2611 return -ENOSPC;
2612 keyconf->hw_key_idx = key_offset;
2613 }
2614
2615 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2616 if (ret)
2617 goto end;
2618
2619 /*
2620 * For WEP, the same key is used for multicast and unicast. Upload it
2621 * again, using the same key offset, and now pointing the other one
2622 * to the same key slot (offset).
2623 * If this fails, remove the original as well.
2624 */
2625 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2626 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2627 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2628 key_offset, !mcast);
2629 if (ret) {
2630 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2631 goto end;
2632 }
2633 }
2634
2635 __set_bit(key_offset, mvm->fw_key_table);
2636
2637 end:
2638 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2639 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2640 sta ? sta->addr : zero_addr, ret);
2641 return ret;
2642 }
2643
2644 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2645 struct ieee80211_vif *vif,
2646 struct ieee80211_sta *sta,
2647 struct ieee80211_key_conf *keyconf)
2648 {
2649 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2650 struct iwl_mvm_sta *mvm_sta;
2651 u8 sta_id = IWL_MVM_STATION_COUNT;
2652 int ret, i;
2653
2654 lockdep_assert_held(&mvm->mutex);
2655
2656 /* Get the station from the mvm local station table */
2657 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2658
2659 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2660 keyconf->keyidx, sta_id);
2661
2662 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2663 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2664
2665 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2666 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2667 keyconf->hw_key_idx);
2668 return -ENOENT;
2669 }
2670
2671 /* track which key was deleted last */
2672 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2673 if (mvm->fw_key_deleted[i] < U8_MAX)
2674 mvm->fw_key_deleted[i]++;
2675 }
2676 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2677
2678 if (!mvm_sta) {
2679 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2680 return 0;
2681 }
2682
2683 sta_id = mvm_sta->sta_id;
2684
2685 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2686 if (ret)
2687 return ret;
2688
2689 /* delete WEP key twice to get rid of (now useless) offset */
2690 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2691 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2692 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2693
2694 return ret;
2695 }
2696
2697 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2698 struct ieee80211_vif *vif,
2699 struct ieee80211_key_conf *keyconf,
2700 struct ieee80211_sta *sta, u32 iv32,
2701 u16 *phase1key)
2702 {
2703 struct iwl_mvm_sta *mvm_sta;
2704 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2705
2706 rcu_read_lock();
2707
2708 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2709 if (WARN_ON_ONCE(!mvm_sta))
2710 goto unlock;
2711 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2712 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2713
2714 unlock:
2715 rcu_read_unlock();
2716 }
2717
2718 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2719 struct ieee80211_sta *sta)
2720 {
2721 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2722 struct iwl_mvm_add_sta_cmd cmd = {
2723 .add_modify = STA_MODE_MODIFY,
2724 .sta_id = mvmsta->sta_id,
2725 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
2726 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2727 };
2728 int ret;
2729
2730 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2731 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2732 if (ret)
2733 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2734 }
2735
2736 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2737 struct ieee80211_sta *sta,
2738 enum ieee80211_frame_release_type reason,
2739 u16 cnt, u16 tids, bool more_data,
2740 bool agg)
2741 {
2742 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2743 struct iwl_mvm_add_sta_cmd cmd = {
2744 .add_modify = STA_MODE_MODIFY,
2745 .sta_id = mvmsta->sta_id,
2746 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2747 .sleep_tx_count = cpu_to_le16(cnt),
2748 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2749 };
2750 int tid, ret;
2751 unsigned long _tids = tids;
2752
2753 /* convert TIDs to ACs - we don't support TSPEC so that's OK
2754 * Note that this field is reserved and unused by firmware not
2755 * supporting GO uAPSD, so it's safe to always do this.
2756 */
2757 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2758 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2759
2760 /* If we're releasing frames from aggregation queues then check if the
2761 * all queues combined that we're releasing frames from have
2762 * - more frames than the service period, in which case more_data
2763 * needs to be set
2764 * - fewer than 'cnt' frames, in which case we need to adjust the
2765 * firmware command (but do that unconditionally)
2766 */
2767 if (agg) {
2768 int remaining = cnt;
2769 int sleep_tx_count;
2770
2771 spin_lock_bh(&mvmsta->lock);
2772 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2773 struct iwl_mvm_tid_data *tid_data;
2774 u16 n_queued;
2775
2776 tid_data = &mvmsta->tid_data[tid];
2777 if (WARN(tid_data->state != IWL_AGG_ON &&
2778 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2779 "TID %d state is %d\n",
2780 tid, tid_data->state)) {
2781 spin_unlock_bh(&mvmsta->lock);
2782 ieee80211_sta_eosp(sta);
2783 return;
2784 }
2785
2786 n_queued = iwl_mvm_tid_queued(tid_data);
2787 if (n_queued > remaining) {
2788 more_data = true;
2789 remaining = 0;
2790 break;
2791 }
2792 remaining -= n_queued;
2793 }
2794 sleep_tx_count = cnt - remaining;
2795 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2796 mvmsta->sleep_tx_count = sleep_tx_count;
2797 spin_unlock_bh(&mvmsta->lock);
2798
2799 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2800 if (WARN_ON(cnt - remaining == 0)) {
2801 ieee80211_sta_eosp(sta);
2802 return;
2803 }
2804 }
2805
2806 /* Note: this is ignored by firmware not supporting GO uAPSD */
2807 if (more_data)
2808 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2809
2810 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2811 mvmsta->next_status_eosp = true;
2812 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2813 } else {
2814 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2815 }
2816
2817 /* block the Tx queues until the FW updated the sleep Tx count */
2818 iwl_trans_block_txq_ptrs(mvm->trans, true);
2819
2820 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2821 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2822 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2823 if (ret)
2824 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2825 }
2826
2827 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2828 struct iwl_rx_cmd_buffer *rxb)
2829 {
2830 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2831 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2832 struct ieee80211_sta *sta;
2833 u32 sta_id = le32_to_cpu(notif->sta_id);
2834
2835 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2836 return;
2837
2838 rcu_read_lock();
2839 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2840 if (!IS_ERR_OR_NULL(sta))
2841 ieee80211_sta_eosp(sta);
2842 rcu_read_unlock();
2843 }
2844
2845 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2846 struct iwl_mvm_sta *mvmsta, bool disable)
2847 {
2848 struct iwl_mvm_add_sta_cmd cmd = {
2849 .add_modify = STA_MODE_MODIFY,
2850 .sta_id = mvmsta->sta_id,
2851 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2852 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2853 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2854 };
2855 int ret;
2856
2857 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2858 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2859 if (ret)
2860 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2861 }
2862
2863 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2864 struct ieee80211_sta *sta,
2865 bool disable)
2866 {
2867 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2868
2869 spin_lock_bh(&mvm_sta->lock);
2870
2871 if (mvm_sta->disable_tx == disable) {
2872 spin_unlock_bh(&mvm_sta->lock);
2873 return;
2874 }
2875
2876 mvm_sta->disable_tx = disable;
2877
2878 /*
2879 * Tell mac80211 to start/stop queuing tx for this station,
2880 * but don't stop queuing if there are still pending frames
2881 * for this station.
2882 */
2883 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2884 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2885
2886 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2887
2888 spin_unlock_bh(&mvm_sta->lock);
2889 }
2890
2891 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2892 struct iwl_mvm_vif *mvmvif,
2893 bool disable)
2894 {
2895 struct ieee80211_sta *sta;
2896 struct iwl_mvm_sta *mvm_sta;
2897 int i;
2898
2899 lockdep_assert_held(&mvm->mutex);
2900
2901 /* Block/unblock all the stations of the given mvmvif */
2902 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2903 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2904 lockdep_is_held(&mvm->mutex));
2905 if (IS_ERR_OR_NULL(sta))
2906 continue;
2907
2908 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2909 if (mvm_sta->mac_id_n_color !=
2910 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2911 continue;
2912
2913 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2914 }
2915 }
2916
2917 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2918 {
2919 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2920 struct iwl_mvm_sta *mvmsta;
2921
2922 rcu_read_lock();
2923
2924 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2925
2926 if (!WARN_ON(!mvmsta))
2927 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2928
2929 rcu_read_unlock();
2930 }
Linux kernel - Deliverables
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