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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  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
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21  * along with this program; if not, write to the Free Software
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23  * USA
24  *
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26  * in the file called COPYING.
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28  * Contact Information:
29  *  Intel Linux Wireless <ilw@linux.intel.com>
30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31  *
32  * BSD LICENSE
33  *
34  * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36  * All rights reserved.
37  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  *
42  *  * Redistributions of source code must retain the above copyright
43  *    notice, this list of conditions and the following disclaimer.
44  *  * Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in
46  *    the documentation and/or other materials provided with the
47  *    distribution.
48  *  * Neither the name Intel Corporation nor the names of its
49  *    contributors may be used to endorse or promote products derived
50  *    from this software without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63  *
64  *****************************************************************************/
65 #include <net/mac80211.h>
66
67 #include "mvm.h"
68 #include "sta.h"
69 #include "rs.h"
70
71 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
72                                     enum nl80211_iftype iftype)
73 {
74         int sta_id;
75         u32 reserved_ids = 0;
76
77         BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
78         WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
79
80         lockdep_assert_held(&mvm->mutex);
81
82         /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
83         if (iftype != NL80211_IFTYPE_STATION)
84                 reserved_ids = BIT(0);
85
86         /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
87         for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
88                 if (BIT(sta_id) & reserved_ids)
89                         continue;
90
91                 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
92                                                lockdep_is_held(&mvm->mutex)))
93                         return sta_id;
94         }
95         return IWL_MVM_STATION_COUNT;
96 }
97
98 /* send station add/update command to firmware */
99 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
100                            bool update)
101 {
102         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
103         struct iwl_mvm_add_sta_cmd add_sta_cmd = {
104                 .sta_id = mvm_sta->sta_id,
105                 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
106                 .add_modify = update ? 1 : 0,
107                 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
108                                                  STA_FLG_MIMO_EN_MSK),
109         };
110         int ret;
111         u32 status;
112         u32 agg_size = 0, mpdu_dens = 0;
113
114         if (!update) {
115                 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
116                 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
117         }
118
119         switch (sta->bandwidth) {
120         case IEEE80211_STA_RX_BW_160:
121                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
122                 /* fall through */
123         case IEEE80211_STA_RX_BW_80:
124                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
125                 /* fall through */
126         case IEEE80211_STA_RX_BW_40:
127                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
128                 /* fall through */
129         case IEEE80211_STA_RX_BW_20:
130                 if (sta->ht_cap.ht_supported)
131                         add_sta_cmd.station_flags |=
132                                 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
133                 break;
134         }
135
136         switch (sta->rx_nss) {
137         case 1:
138                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
139                 break;
140         case 2:
141                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
142                 break;
143         case 3 ... 8:
144                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
145                 break;
146         }
147
148         switch (sta->smps_mode) {
149         case IEEE80211_SMPS_AUTOMATIC:
150         case IEEE80211_SMPS_NUM_MODES:
151                 WARN_ON(1);
152                 break;
153         case IEEE80211_SMPS_STATIC:
154                 /* override NSS */
155                 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
156                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157                 break;
158         case IEEE80211_SMPS_DYNAMIC:
159                 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
160                 break;
161         case IEEE80211_SMPS_OFF:
162                 /* nothing */
163                 break;
164         }
165
166         if (sta->ht_cap.ht_supported) {
167                 add_sta_cmd.station_flags_msk |=
168                         cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
169                                     STA_FLG_AGG_MPDU_DENS_MSK);
170
171                 mpdu_dens = sta->ht_cap.ampdu_density;
172         }
173
174         if (sta->vht_cap.vht_supported) {
175                 agg_size = sta->vht_cap.cap &
176                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
177                 agg_size >>=
178                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
179         } else if (sta->ht_cap.ht_supported) {
180                 agg_size = sta->ht_cap.ampdu_factor;
181         }
182
183         add_sta_cmd.station_flags |=
184                 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
185         add_sta_cmd.station_flags |=
186                 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
187
188         status = ADD_STA_SUCCESS;
189         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd),
190                                           &add_sta_cmd, &status);
191         if (ret)
192                 return ret;
193
194         switch (status) {
195         case ADD_STA_SUCCESS:
196                 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
197                 break;
198         default:
199                 ret = -EIO;
200                 IWL_ERR(mvm, "ADD_STA failed\n");
201                 break;
202         }
203
204         return ret;
205 }
206
207 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
208                                  struct ieee80211_sta *sta)
209 {
210         unsigned long used_hw_queues;
211         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
212         unsigned int wdg_timeout =
213                 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
214         u32 ac;
215
216         lockdep_assert_held(&mvm->mutex);
217
218         used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
219
220         /* Find available queues, and allocate them to the ACs */
221         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
222                 u8 queue = find_first_zero_bit(&used_hw_queues,
223                                                mvm->first_agg_queue);
224
225                 if (queue >= mvm->first_agg_queue) {
226                         IWL_ERR(mvm, "Failed to allocate STA queue\n");
227                         return -EBUSY;
228                 }
229
230                 __set_bit(queue, &used_hw_queues);
231                 mvmsta->hw_queue[ac] = queue;
232         }
233
234         /* Found a place for all queues - enable them */
235         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
236                 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
237                                       mvmsta->hw_queue[ac],
238                                       iwl_mvm_ac_to_tx_fifo[ac], 0,
239                                       wdg_timeout);
240                 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
241         }
242
243         return 0;
244 }
245
246 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
247                                     struct ieee80211_sta *sta)
248 {
249         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
250         unsigned long sta_msk;
251         int i;
252
253         lockdep_assert_held(&mvm->mutex);
254
255         /* disable the TDLS STA-specific queues */
256         sta_msk = mvmsta->tfd_queue_msk;
257         for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
258                 iwl_mvm_disable_txq(mvm, i, i, 0, 0);
259 }
260
261 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
262                     struct ieee80211_vif *vif,
263                     struct ieee80211_sta *sta)
264 {
265         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
266         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
267         int i, ret, sta_id;
268
269         lockdep_assert_held(&mvm->mutex);
270
271         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
272                 sta_id = iwl_mvm_find_free_sta_id(mvm,
273                                                   ieee80211_vif_type_p2p(vif));
274         else
275                 sta_id = mvm_sta->sta_id;
276
277         if (sta_id == IWL_MVM_STATION_COUNT)
278                 return -ENOSPC;
279
280         if (vif->type == NL80211_IFTYPE_AP) {
281                 mvmvif->ap_assoc_sta_count++;
282                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
283         }
284
285         spin_lock_init(&mvm_sta->lock);
286
287         mvm_sta->sta_id = sta_id;
288         mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
289                                                       mvmvif->color);
290         mvm_sta->vif = vif;
291         mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
292         mvm_sta->tx_protection = 0;
293         mvm_sta->tt_tx_protection = false;
294
295         /* HW restart, don't assume the memory has been zeroed */
296         atomic_set(&mvm->pending_frames[sta_id], 0);
297         mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
298         mvm_sta->tfd_queue_msk = 0;
299
300         /* allocate new queues for a TDLS station */
301         if (sta->tdls) {
302                 ret = iwl_mvm_tdls_sta_init(mvm, sta);
303                 if (ret)
304                         return ret;
305         } else {
306                 for (i = 0; i < IEEE80211_NUM_ACS; i++)
307                         if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
308                                 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
309         }
310
311         /* for HW restart - reset everything but the sequence number */
312         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
313                 u16 seq = mvm_sta->tid_data[i].seq_number;
314                 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
315                 mvm_sta->tid_data[i].seq_number = seq;
316         }
317         mvm_sta->agg_tids = 0;
318
319         ret = iwl_mvm_sta_send_to_fw(mvm, sta, false);
320         if (ret)
321                 goto err;
322
323         if (vif->type == NL80211_IFTYPE_STATION) {
324                 if (!sta->tdls) {
325                         WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
326                         mvmvif->ap_sta_id = sta_id;
327                 } else {
328                         WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
329                 }
330         }
331
332         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
333
334         return 0;
335
336 err:
337         iwl_mvm_tdls_sta_deinit(mvm, sta);
338         return ret;
339 }
340
341 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
342                        struct ieee80211_vif *vif,
343                        struct ieee80211_sta *sta)
344 {
345         return iwl_mvm_sta_send_to_fw(mvm, sta, true);
346 }
347
348 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
349                       bool drain)
350 {
351         struct iwl_mvm_add_sta_cmd cmd = {};
352         int ret;
353         u32 status;
354
355         lockdep_assert_held(&mvm->mutex);
356
357         cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
358         cmd.sta_id = mvmsta->sta_id;
359         cmd.add_modify = STA_MODE_MODIFY;
360         cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
361         cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
362
363         status = ADD_STA_SUCCESS;
364         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
365                                           &cmd, &status);
366         if (ret)
367                 return ret;
368
369         switch (status) {
370         case ADD_STA_SUCCESS:
371                 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
372                                mvmsta->sta_id);
373                 break;
374         default:
375                 ret = -EIO;
376                 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
377                         mvmsta->sta_id);
378                 break;
379         }
380
381         return ret;
382 }
383
384 /*
385  * Remove a station from the FW table. Before sending the command to remove
386  * the station validate that the station is indeed known to the driver (sanity
387  * only).
388  */
389 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
390 {
391         struct ieee80211_sta *sta;
392         struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
393                 .sta_id = sta_id,
394         };
395         int ret;
396
397         sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
398                                         lockdep_is_held(&mvm->mutex));
399
400         /* Note: internal stations are marked as error values */
401         if (!sta) {
402                 IWL_ERR(mvm, "Invalid station id\n");
403                 return -EINVAL;
404         }
405
406         ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
407                                    sizeof(rm_sta_cmd), &rm_sta_cmd);
408         if (ret) {
409                 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
410                 return ret;
411         }
412
413         return 0;
414 }
415
416 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
417 {
418         struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
419         u8 sta_id;
420
421         /*
422          * The mutex is needed because of the SYNC cmd, but not only: if the
423          * work would run concurrently with iwl_mvm_rm_sta, it would run before
424          * iwl_mvm_rm_sta sets the station as busy, and exit. Then
425          * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
426          * that later.
427          */
428         mutex_lock(&mvm->mutex);
429
430         for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
431                 int ret;
432                 struct ieee80211_sta *sta =
433                         rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
434                                                   lockdep_is_held(&mvm->mutex));
435
436                 /*
437                  * This station is in use or RCU-removed; the latter happens in
438                  * managed mode, where mac80211 removes the station before we
439                  * can remove it from firmware (we can only do that after the
440                  * MAC is marked unassociated), and possibly while the deauth
441                  * frame to disconnect from the AP is still queued. Then, the
442                  * station pointer is -ENOENT when the last skb is reclaimed.
443                  */
444                 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
445                         continue;
446
447                 if (PTR_ERR(sta) == -EINVAL) {
448                         IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
449                                 sta_id);
450                         continue;
451                 }
452
453                 if (!sta) {
454                         IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
455                                 sta_id);
456                         continue;
457                 }
458
459                 WARN_ON(PTR_ERR(sta) != -EBUSY);
460                 /* This station was removed and we waited until it got drained,
461                  * we can now proceed and remove it.
462                  */
463                 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
464                 if (ret) {
465                         IWL_ERR(mvm,
466                                 "Couldn't remove sta %d after it was drained\n",
467                                 sta_id);
468                         continue;
469                 }
470                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
471                 clear_bit(sta_id, mvm->sta_drained);
472
473                 if (mvm->tfd_drained[sta_id]) {
474                         unsigned long i, msk = mvm->tfd_drained[sta_id];
475
476                         for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
477                                 iwl_mvm_disable_txq(mvm, i, i, 0, 0);
478
479                         mvm->tfd_drained[sta_id] = 0;
480                         IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
481                                        sta_id, msk);
482                 }
483         }
484
485         mutex_unlock(&mvm->mutex);
486 }
487
488 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
489                    struct ieee80211_vif *vif,
490                    struct ieee80211_sta *sta)
491 {
492         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
493         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
494         int ret;
495
496         lockdep_assert_held(&mvm->mutex);
497
498         if (vif->type == NL80211_IFTYPE_STATION &&
499             mvmvif->ap_sta_id == mvm_sta->sta_id) {
500                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
501                 if (ret)
502                         return ret;
503                 /* flush its queues here since we are freeing mvm_sta */
504                 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true);
505                 if (ret)
506                         return ret;
507                 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
508                                                     mvm_sta->tfd_queue_msk);
509                 if (ret)
510                         return ret;
511                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
512
513                 /* if we are associated - we can't remove the AP STA now */
514                 if (vif->bss_conf.assoc)
515                         return ret;
516
517                 /* unassoc - go ahead - remove the AP STA now */
518                 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
519
520                 /* clear d0i3_ap_sta_id if no longer relevant */
521                 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
522                         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
523         }
524
525         /*
526          * This shouldn't happen - the TDLS channel switch should be canceled
527          * before the STA is removed.
528          */
529         if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
530                 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
531                 cancel_delayed_work(&mvm->tdls_cs.dwork);
532         }
533
534         /*
535          * Make sure that the tx response code sees the station as -EBUSY and
536          * calls the drain worker.
537          */
538         spin_lock_bh(&mvm_sta->lock);
539         /*
540          * There are frames pending on the AC queues for this station.
541          * We need to wait until all the frames are drained...
542          */
543         if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
544                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
545                                    ERR_PTR(-EBUSY));
546                 spin_unlock_bh(&mvm_sta->lock);
547
548                 /* disable TDLS sta queues on drain complete */
549                 if (sta->tdls) {
550                         mvm->tfd_drained[mvm_sta->sta_id] =
551                                                         mvm_sta->tfd_queue_msk;
552                         IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
553                                        mvm_sta->sta_id);
554                 }
555
556                 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
557         } else {
558                 spin_unlock_bh(&mvm_sta->lock);
559
560                 if (sta->tdls)
561                         iwl_mvm_tdls_sta_deinit(mvm, sta);
562
563                 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
564                 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
565         }
566
567         return ret;
568 }
569
570 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
571                       struct ieee80211_vif *vif,
572                       u8 sta_id)
573 {
574         int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
575
576         lockdep_assert_held(&mvm->mutex);
577
578         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
579         return ret;
580 }
581
582 static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
583                                     struct iwl_mvm_int_sta *sta,
584                                     u32 qmask, enum nl80211_iftype iftype)
585 {
586         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
587                 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
588                 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
589                         return -ENOSPC;
590         }
591
592         sta->tfd_queue_msk = qmask;
593
594         /* put a non-NULL value so iterating over the stations won't stop */
595         rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
596         return 0;
597 }
598
599 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
600                                     struct iwl_mvm_int_sta *sta)
601 {
602         RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
603         memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
604         sta->sta_id = IWL_MVM_STATION_COUNT;
605 }
606
607 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
608                                       struct iwl_mvm_int_sta *sta,
609                                       const u8 *addr,
610                                       u16 mac_id, u16 color)
611 {
612         struct iwl_mvm_add_sta_cmd cmd;
613         int ret;
614         u32 status;
615
616         lockdep_assert_held(&mvm->mutex);
617
618         memset(&cmd, 0, sizeof(cmd));
619         cmd.sta_id = sta->sta_id;
620         cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
621                                                              color));
622
623         cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
624
625         if (addr)
626                 memcpy(cmd.addr, addr, ETH_ALEN);
627
628         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
629                                           &cmd, &status);
630         if (ret)
631                 return ret;
632
633         switch (status) {
634         case ADD_STA_SUCCESS:
635                 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
636                 return 0;
637         default:
638                 ret = -EIO;
639                 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
640                         status);
641                 break;
642         }
643         return ret;
644 }
645
646 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
647 {
648         unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
649                                         mvm->cfg->base_params->wd_timeout :
650                                         IWL_WATCHDOG_DISABLED;
651         int ret;
652
653         lockdep_assert_held(&mvm->mutex);
654
655         /* Map Aux queue to fifo - needs to happen before adding Aux station */
656         iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
657                               IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
658
659         /* Allocate aux station and assign to it the aux queue */
660         ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
661                                        NL80211_IFTYPE_UNSPECIFIED);
662         if (ret)
663                 return ret;
664
665         ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
666                                          MAC_INDEX_AUX, 0);
667
668         if (ret)
669                 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
670         return ret;
671 }
672
673 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
674 {
675         lockdep_assert_held(&mvm->mutex);
676
677         iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
678 }
679
680 /*
681  * Send the add station command for the vif's broadcast station.
682  * Assumes that the station was already allocated.
683  *
684  * @mvm: the mvm component
685  * @vif: the interface to which the broadcast station is added
686  * @bsta: the broadcast station to add.
687  */
688 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
689 {
690         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
691         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
692         static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
693         const u8 *baddr = _baddr;
694
695         lockdep_assert_held(&mvm->mutex);
696
697         if (vif->type == NL80211_IFTYPE_ADHOC)
698                 baddr = vif->bss_conf.bssid;
699
700         if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
701                 return -ENOSPC;
702
703         return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
704                                           mvmvif->id, mvmvif->color);
705 }
706
707 /* Send the FW a request to remove the station from it's internal data
708  * structures, but DO NOT remove the entry from the local data structures. */
709 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
710 {
711         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
712         int ret;
713
714         lockdep_assert_held(&mvm->mutex);
715
716         ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
717         if (ret)
718                 IWL_WARN(mvm, "Failed sending remove station\n");
719         return ret;
720 }
721
722 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
723 {
724         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
725         u32 qmask;
726
727         lockdep_assert_held(&mvm->mutex);
728
729         qmask = iwl_mvm_mac_get_queues_mask(vif);
730
731         /*
732          * The firmware defines the TFD queue mask to only be relevant
733          * for *unicast* queues, so the multicast (CAB) queue shouldn't
734          * be included.
735          */
736         if (vif->type == NL80211_IFTYPE_AP)
737                 qmask &= ~BIT(vif->cab_queue);
738
739         return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
740                                         ieee80211_vif_type_p2p(vif));
741 }
742
743 /* Allocate a new station entry for the broadcast station to the given vif,
744  * and send it to the FW.
745  * Note that each P2P mac should have its own broadcast station.
746  *
747  * @mvm: the mvm component
748  * @vif: the interface to which the broadcast station is added
749  * @bsta: the broadcast station to add. */
750 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
751 {
752         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
753         struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
754         int ret;
755
756         lockdep_assert_held(&mvm->mutex);
757
758         ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
759         if (ret)
760                 return ret;
761
762         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
763
764         if (ret)
765                 iwl_mvm_dealloc_int_sta(mvm, bsta);
766
767         return ret;
768 }
769
770 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
771 {
772         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
773
774         iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
775 }
776
777 /*
778  * Send the FW a request to remove the station from it's internal data
779  * structures, and in addition remove it from the local data structure.
780  */
781 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
782 {
783         int ret;
784
785         lockdep_assert_held(&mvm->mutex);
786
787         ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
788
789         iwl_mvm_dealloc_bcast_sta(mvm, vif);
790
791         return ret;
792 }
793
794 #define IWL_MAX_RX_BA_SESSIONS 16
795
796 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
797                        int tid, u16 ssn, bool start)
798 {
799         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
800         struct iwl_mvm_add_sta_cmd cmd = {};
801         int ret;
802         u32 status;
803
804         lockdep_assert_held(&mvm->mutex);
805
806         if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
807                 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
808                 return -ENOSPC;
809         }
810
811         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
812         cmd.sta_id = mvm_sta->sta_id;
813         cmd.add_modify = STA_MODE_MODIFY;
814         if (start) {
815                 cmd.add_immediate_ba_tid = (u8) tid;
816                 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
817         } else {
818                 cmd.remove_immediate_ba_tid = (u8) tid;
819         }
820         cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
821                                   STA_MODIFY_REMOVE_BA_TID;
822
823         status = ADD_STA_SUCCESS;
824         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
825                                           &cmd, &status);
826         if (ret)
827                 return ret;
828
829         switch (status) {
830         case ADD_STA_SUCCESS:
831                 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
832                                start ? "start" : "stopp");
833                 break;
834         case ADD_STA_IMMEDIATE_BA_FAILURE:
835                 IWL_WARN(mvm, "RX BA Session refused by fw\n");
836                 ret = -ENOSPC;
837                 break;
838         default:
839                 ret = -EIO;
840                 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
841                         start ? "start" : "stopp", status);
842                 break;
843         }
844
845         if (!ret) {
846                 if (start)
847                         mvm->rx_ba_sessions++;
848                 else if (mvm->rx_ba_sessions > 0)
849                         /* check that restart flow didn't zero the counter */
850                         mvm->rx_ba_sessions--;
851         }
852
853         return ret;
854 }
855
856 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
857                               int tid, u8 queue, bool start)
858 {
859         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
860         struct iwl_mvm_add_sta_cmd cmd = {};
861         int ret;
862         u32 status;
863
864         lockdep_assert_held(&mvm->mutex);
865
866         if (start) {
867                 mvm_sta->tfd_queue_msk |= BIT(queue);
868                 mvm_sta->tid_disable_agg &= ~BIT(tid);
869         } else {
870                 mvm_sta->tfd_queue_msk &= ~BIT(queue);
871                 mvm_sta->tid_disable_agg |= BIT(tid);
872         }
873
874         cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
875         cmd.sta_id = mvm_sta->sta_id;
876         cmd.add_modify = STA_MODE_MODIFY;
877         cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
878         cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
879         cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
880
881         status = ADD_STA_SUCCESS;
882         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd),
883                                           &cmd, &status);
884         if (ret)
885                 return ret;
886
887         switch (status) {
888         case ADD_STA_SUCCESS:
889                 break;
890         default:
891                 ret = -EIO;
892                 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
893                         start ? "start" : "stopp", status);
894                 break;
895         }
896
897         return ret;
898 }
899
900 const u8 tid_to_mac80211_ac[] = {
901         IEEE80211_AC_BE,
902         IEEE80211_AC_BK,
903         IEEE80211_AC_BK,
904         IEEE80211_AC_BE,
905         IEEE80211_AC_VI,
906         IEEE80211_AC_VI,
907         IEEE80211_AC_VO,
908         IEEE80211_AC_VO,
909 };
910
911 static const u8 tid_to_ucode_ac[] = {
912         AC_BE,
913         AC_BK,
914         AC_BK,
915         AC_BE,
916         AC_VI,
917         AC_VI,
918         AC_VO,
919         AC_VO,
920 };
921
922 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
923                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
924 {
925         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
926         struct iwl_mvm_tid_data *tid_data;
927         int txq_id;
928         int ret;
929
930         if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
931                 return -EINVAL;
932
933         if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
934                 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
935                         mvmsta->tid_data[tid].state);
936                 return -ENXIO;
937         }
938
939         lockdep_assert_held(&mvm->mutex);
940
941         spin_lock_bh(&mvmsta->lock);
942
943         /* possible race condition - we entered D0i3 while starting agg */
944         if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
945                 spin_unlock_bh(&mvmsta->lock);
946                 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
947                 return -EIO;
948         }
949
950         spin_lock_bh(&mvm->queue_info_lock);
951
952         txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
953                                          mvm->last_agg_queue);
954         if (txq_id < 0) {
955                 ret = txq_id;
956                 spin_unlock_bh(&mvm->queue_info_lock);
957                 IWL_ERR(mvm, "Failed to allocate agg queue\n");
958                 goto release_locks;
959         }
960         mvm->queue_info[txq_id].setup_reserved = true;
961         spin_unlock_bh(&mvm->queue_info_lock);
962
963         tid_data = &mvmsta->tid_data[tid];
964         tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
965         tid_data->txq_id = txq_id;
966         *ssn = tid_data->ssn;
967
968         IWL_DEBUG_TX_QUEUES(mvm,
969                             "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
970                             mvmsta->sta_id, tid, txq_id, tid_data->ssn,
971                             tid_data->next_reclaimed);
972
973         if (tid_data->ssn == tid_data->next_reclaimed) {
974                 tid_data->state = IWL_AGG_STARTING;
975                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
976         } else {
977                 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
978         }
979
980         ret = 0;
981
982 release_locks:
983         spin_unlock_bh(&mvmsta->lock);
984
985         return ret;
986 }
987
988 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
989                             struct ieee80211_sta *sta, u16 tid, u8 buf_size)
990 {
991         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
992         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
993         unsigned int wdg_timeout =
994                 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
995         int queue, fifo, ret;
996         u16 ssn;
997
998         BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
999                      != IWL_MAX_TID_COUNT);
1000
1001         buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1002
1003         spin_lock_bh(&mvmsta->lock);
1004         ssn = tid_data->ssn;
1005         queue = tid_data->txq_id;
1006         tid_data->state = IWL_AGG_ON;
1007         mvmsta->agg_tids |= BIT(tid);
1008         tid_data->ssn = 0xffff;
1009         spin_unlock_bh(&mvmsta->lock);
1010
1011         fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1012
1013         iwl_mvm_enable_agg_txq(mvm, queue,
1014                                vif->hw_queue[tid_to_mac80211_ac[tid]], fifo,
1015                                mvmsta->sta_id, tid, buf_size, ssn, wdg_timeout);
1016
1017         ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1018         if (ret)
1019                 return -EIO;
1020
1021         /* No need to mark as reserved */
1022         spin_lock_bh(&mvm->queue_info_lock);
1023         mvm->queue_info[queue].setup_reserved = false;
1024         spin_unlock_bh(&mvm->queue_info_lock);
1025
1026         /*
1027          * Even though in theory the peer could have different
1028          * aggregation reorder buffer sizes for different sessions,
1029          * our ucode doesn't allow for that and has a global limit
1030          * for each station. Therefore, use the minimum of all the
1031          * aggregation sessions and our default value.
1032          */
1033         mvmsta->max_agg_bufsize =
1034                 min(mvmsta->max_agg_bufsize, buf_size);
1035         mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1036
1037         IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1038                      sta->addr, tid);
1039
1040         return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1041 }
1042
1043 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1044                             struct ieee80211_sta *sta, u16 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         u16 txq_id;
1049         int err;
1050
1051
1052         /*
1053          * If mac80211 is cleaning its state, then say that we finished since
1054          * our state has been cleared anyway.
1055          */
1056         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1057                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1058                 return 0;
1059         }
1060
1061         spin_lock_bh(&mvmsta->lock);
1062
1063         txq_id = tid_data->txq_id;
1064
1065         IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1066                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1067
1068         mvmsta->agg_tids &= ~BIT(tid);
1069
1070         /* No need to mark as reserved anymore */
1071         spin_lock_bh(&mvm->queue_info_lock);
1072         mvm->queue_info[txq_id].setup_reserved = false;
1073         spin_unlock_bh(&mvm->queue_info_lock);
1074
1075         switch (tid_data->state) {
1076         case IWL_AGG_ON:
1077                 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1078
1079                 IWL_DEBUG_TX_QUEUES(mvm,
1080                                     "ssn = %d, next_recl = %d\n",
1081                                     tid_data->ssn, tid_data->next_reclaimed);
1082
1083                 /* There are still packets for this RA / TID in the HW */
1084                 if (tid_data->ssn != tid_data->next_reclaimed) {
1085                         tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1086                         err = 0;
1087                         break;
1088                 }
1089
1090                 tid_data->ssn = 0xffff;
1091                 tid_data->state = IWL_AGG_OFF;
1092                 spin_unlock_bh(&mvmsta->lock);
1093
1094                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1095
1096                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1097
1098                 iwl_mvm_disable_txq(mvm, txq_id,
1099                                     vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1100                                     0);
1101                 return 0;
1102         case IWL_AGG_STARTING:
1103         case IWL_EMPTYING_HW_QUEUE_ADDBA:
1104                 /*
1105                  * The agg session has been stopped before it was set up. This
1106                  * can happen when the AddBA timer times out for example.
1107                  */
1108
1109                 /* No barriers since we are under mutex */
1110                 lockdep_assert_held(&mvm->mutex);
1111
1112                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1113                 tid_data->state = IWL_AGG_OFF;
1114                 err = 0;
1115                 break;
1116         default:
1117                 IWL_ERR(mvm,
1118                         "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1119                         mvmsta->sta_id, tid, tid_data->state);
1120                 IWL_ERR(mvm,
1121                         "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1122                 err = -EINVAL;
1123         }
1124
1125         spin_unlock_bh(&mvmsta->lock);
1126
1127         return err;
1128 }
1129
1130 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1131                             struct ieee80211_sta *sta, u16 tid)
1132 {
1133         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1134         struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1135         u16 txq_id;
1136         enum iwl_mvm_agg_state old_state;
1137
1138         /*
1139          * First set the agg state to OFF to avoid calling
1140          * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1141          */
1142         spin_lock_bh(&mvmsta->lock);
1143         txq_id = tid_data->txq_id;
1144         IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1145                             mvmsta->sta_id, tid, txq_id, tid_data->state);
1146         old_state = tid_data->state;
1147         tid_data->state = IWL_AGG_OFF;
1148         mvmsta->agg_tids &= ~BIT(tid);
1149         spin_unlock_bh(&mvmsta->lock);
1150
1151         /* No need to mark as reserved */
1152         spin_lock_bh(&mvm->queue_info_lock);
1153         mvm->queue_info[txq_id].setup_reserved = false;
1154         spin_unlock_bh(&mvm->queue_info_lock);
1155
1156         if (old_state >= IWL_AGG_ON) {
1157                 iwl_mvm_drain_sta(mvm, mvmsta, true);
1158                 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true))
1159                         IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1160                 iwl_trans_wait_tx_queue_empty(mvm->trans,
1161                                               mvmsta->tfd_queue_msk);
1162                 iwl_mvm_drain_sta(mvm, mvmsta, false);
1163
1164                 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1165
1166                 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1167                                     vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1168                                     0);
1169         }
1170
1171         return 0;
1172 }
1173
1174 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1175 {
1176         int i, max = -1, max_offs = -1;
1177
1178         lockdep_assert_held(&mvm->mutex);
1179
1180         /* Pick the unused key offset with the highest 'deleted'
1181          * counter. Every time a key is deleted, all the counters
1182          * are incremented and the one that was just deleted is
1183          * reset to zero. Thus, the highest counter is the one
1184          * that was deleted longest ago. Pick that one.
1185          */
1186         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1187                 if (test_bit(i, mvm->fw_key_table))
1188                         continue;
1189                 if (mvm->fw_key_deleted[i] > max) {
1190                         max = mvm->fw_key_deleted[i];
1191                         max_offs = i;
1192                 }
1193         }
1194
1195         if (max_offs < 0)
1196                 return STA_KEY_IDX_INVALID;
1197
1198         __set_bit(max_offs, mvm->fw_key_table);
1199
1200         return max_offs;
1201 }
1202
1203 static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif,
1204                                  struct ieee80211_sta *sta)
1205 {
1206         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1207
1208         if (sta) {
1209                 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1210
1211                 return mvm_sta->sta_id;
1212         }
1213
1214         /*
1215          * The device expects GTKs for station interfaces to be
1216          * installed as GTKs for the AP station. If we have no
1217          * station ID, then use AP's station ID.
1218          */
1219         if (vif->type == NL80211_IFTYPE_STATION &&
1220             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT)
1221                 return mvmvif->ap_sta_id;
1222
1223         return IWL_MVM_STATION_COUNT;
1224 }
1225
1226 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1227                                 struct iwl_mvm_sta *mvm_sta,
1228                                 struct ieee80211_key_conf *keyconf, bool mcast,
1229                                 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags)
1230 {
1231         struct iwl_mvm_add_sta_key_cmd cmd = {};
1232         __le16 key_flags;
1233         int ret;
1234         u32 status;
1235         u16 keyidx;
1236         int i;
1237         u8 sta_id = mvm_sta->sta_id;
1238
1239         keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1240                  STA_KEY_FLG_KEYID_MSK;
1241         key_flags = cpu_to_le16(keyidx);
1242         key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1243
1244         switch (keyconf->cipher) {
1245         case WLAN_CIPHER_SUITE_TKIP:
1246                 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1247                 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1248                 for (i = 0; i < 5; i++)
1249                         cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1250                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1251                 break;
1252         case WLAN_CIPHER_SUITE_CCMP:
1253                 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1254                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1255                 break;
1256         case WLAN_CIPHER_SUITE_WEP104:
1257                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1258                 /* fall through */
1259         case WLAN_CIPHER_SUITE_WEP40:
1260                 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1261                 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1262                 break;
1263         default:
1264                 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1265                 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1266         }
1267
1268         if (mcast)
1269                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1270
1271         cmd.key_offset = keyconf->hw_key_idx;
1272         cmd.key_flags = key_flags;
1273         cmd.sta_id = sta_id;
1274
1275         status = ADD_STA_SUCCESS;
1276         if (cmd_flags & CMD_ASYNC)
1277                 ret =  iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1278                                             sizeof(cmd), &cmd);
1279         else
1280                 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1281                                                   &cmd, &status);
1282
1283         switch (status) {
1284         case ADD_STA_SUCCESS:
1285                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1286                 break;
1287         default:
1288                 ret = -EIO;
1289                 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1290                 break;
1291         }
1292
1293         return ret;
1294 }
1295
1296 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1297                                  struct ieee80211_key_conf *keyconf,
1298                                  u8 sta_id, bool remove_key)
1299 {
1300         struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1301
1302         /* verify the key details match the required command's expectations */
1303         if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1304                     (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1305                     (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1306                 return -EINVAL;
1307
1308         igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1309         igtk_cmd.sta_id = cpu_to_le32(sta_id);
1310
1311         if (remove_key) {
1312                 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1313         } else {
1314                 struct ieee80211_key_seq seq;
1315                 const u8 *pn;
1316
1317                 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1318                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1319                 pn = seq.aes_cmac.pn;
1320                 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1321                                                        ((u64) pn[4] << 8) |
1322                                                        ((u64) pn[3] << 16) |
1323                                                        ((u64) pn[2] << 24) |
1324                                                        ((u64) pn[1] << 32) |
1325                                                        ((u64) pn[0] << 40));
1326         }
1327
1328         IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1329                        remove_key ? "removing" : "installing",
1330                        igtk_cmd.sta_id);
1331
1332         return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1333                                     sizeof(igtk_cmd), &igtk_cmd);
1334 }
1335
1336
1337 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1338                                        struct ieee80211_vif *vif,
1339                                        struct ieee80211_sta *sta)
1340 {
1341         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1342
1343         if (sta)
1344                 return sta->addr;
1345
1346         if (vif->type == NL80211_IFTYPE_STATION &&
1347             mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1348                 u8 sta_id = mvmvif->ap_sta_id;
1349                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1350                                                 lockdep_is_held(&mvm->mutex));
1351                 return sta->addr;
1352         }
1353
1354
1355         return NULL;
1356 }
1357
1358 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1359                                  struct ieee80211_vif *vif,
1360                                  struct ieee80211_sta *sta,
1361                                  struct ieee80211_key_conf *keyconf,
1362                                  bool mcast)
1363 {
1364         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1365         int ret;
1366         const u8 *addr;
1367         struct ieee80211_key_seq seq;
1368         u16 p1k[5];
1369
1370         switch (keyconf->cipher) {
1371         case WLAN_CIPHER_SUITE_TKIP:
1372                 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1373                 /* get phase 1 key from mac80211 */
1374                 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1375                 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1376                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1377                                            seq.tkip.iv32, p1k, 0);
1378                 break;
1379         case WLAN_CIPHER_SUITE_CCMP:
1380         case WLAN_CIPHER_SUITE_WEP40:
1381         case WLAN_CIPHER_SUITE_WEP104:
1382                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1383                                            0, NULL, 0);
1384                 break;
1385         default:
1386                 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1387                                            0, NULL, 0);
1388         }
1389
1390         return ret;
1391 }
1392
1393 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1394                                     struct ieee80211_key_conf *keyconf,
1395                                     bool mcast)
1396 {
1397         struct iwl_mvm_add_sta_key_cmd cmd = {};
1398         __le16 key_flags;
1399         int ret;
1400         u32 status;
1401
1402         key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1403                                  STA_KEY_FLG_KEYID_MSK);
1404         key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1405         key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1406
1407         if (mcast)
1408                 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1409
1410         cmd.key_flags = key_flags;
1411         cmd.key_offset = keyconf->hw_key_idx;
1412         cmd.sta_id = sta_id;
1413
1414         status = ADD_STA_SUCCESS;
1415         ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1416                                           &cmd, &status);
1417
1418         switch (status) {
1419         case ADD_STA_SUCCESS:
1420                 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1421                 break;
1422         default:
1423                 ret = -EIO;
1424                 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1425                 break;
1426         }
1427
1428         return ret;
1429 }
1430
1431 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1432                         struct ieee80211_vif *vif,
1433                         struct ieee80211_sta *sta,
1434                         struct ieee80211_key_conf *keyconf,
1435                         bool have_key_offset)
1436 {
1437         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1438         u8 sta_id;
1439         int ret;
1440         static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
1441
1442         lockdep_assert_held(&mvm->mutex);
1443
1444         /* Get the station id from the mvm local station table */
1445         sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1446         if (sta_id == IWL_MVM_STATION_COUNT) {
1447                 IWL_ERR(mvm, "Failed to find station id\n");
1448                 return -EINVAL;
1449         }
1450
1451         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
1452                 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
1453                 goto end;
1454         }
1455
1456         /*
1457          * It is possible that the 'sta' parameter is NULL, and thus
1458          * there is a need to retrieve  the sta from the local station table.
1459          */
1460         if (!sta) {
1461                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1462                                                 lockdep_is_held(&mvm->mutex));
1463                 if (IS_ERR_OR_NULL(sta)) {
1464                         IWL_ERR(mvm, "Invalid station id\n");
1465                         return -EINVAL;
1466                 }
1467         }
1468
1469         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1470                 return -EINVAL;
1471
1472         if (!have_key_offset) {
1473                 /*
1474                  * The D3 firmware hardcodes the PTK offset to 0, so we have to
1475                  * configure it there. As a result, this workaround exists to
1476                  * let the caller set the key offset (hw_key_idx), see d3.c.
1477                  */
1478                 keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm);
1479                 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
1480                         return -ENOSPC;
1481         }
1482
1483         ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, mcast);
1484         if (ret) {
1485                 __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1486                 goto end;
1487         }
1488
1489         /*
1490          * For WEP, the same key is used for multicast and unicast. Upload it
1491          * again, using the same key offset, and now pointing the other one
1492          * to the same key slot (offset).
1493          * If this fails, remove the original as well.
1494          */
1495         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1496             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
1497                 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, !mcast);
1498                 if (ret) {
1499                         __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table);
1500                         __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1501                 }
1502         }
1503
1504 end:
1505         IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1506                       keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1507                       sta ? sta->addr : zero_addr, ret);
1508         return ret;
1509 }
1510
1511 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
1512                            struct ieee80211_vif *vif,
1513                            struct ieee80211_sta *sta,
1514                            struct ieee80211_key_conf *keyconf)
1515 {
1516         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1517         u8 sta_id;
1518         int ret, i;
1519
1520         lockdep_assert_held(&mvm->mutex);
1521
1522         /* Get the station id from the mvm local station table */
1523         sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1524
1525         IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
1526                       keyconf->keyidx, sta_id);
1527
1528         if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
1529                 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
1530
1531         if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
1532                 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
1533                         keyconf->hw_key_idx);
1534                 return -ENOENT;
1535         }
1536
1537         /* track which key was deleted last */
1538         for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1539                 if (mvm->fw_key_deleted[i] < U8_MAX)
1540                         mvm->fw_key_deleted[i]++;
1541         }
1542         mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
1543
1544         if (sta_id == IWL_MVM_STATION_COUNT) {
1545                 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
1546                 return 0;
1547         }
1548
1549         /*
1550          * It is possible that the 'sta' parameter is NULL, and thus
1551          * there is a need to retrieve the sta from the local station table,
1552          * for example when a GTK is removed (where the sta_id will then be
1553          * the AP ID, and no station was passed by mac80211.)
1554          */
1555         if (!sta) {
1556                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1557                                                 lockdep_is_held(&mvm->mutex));
1558                 if (!sta) {
1559                         IWL_ERR(mvm, "Invalid station id\n");
1560                         return -EINVAL;
1561                 }
1562         }
1563
1564         if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
1565                 return -EINVAL;
1566
1567         ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
1568         if (ret)
1569                 return ret;
1570
1571         /* delete WEP key twice to get rid of (now useless) offset */
1572         if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
1573             keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
1574                 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
1575
1576         return ret;
1577 }
1578
1579 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
1580                              struct ieee80211_vif *vif,
1581                              struct ieee80211_key_conf *keyconf,
1582                              struct ieee80211_sta *sta, u32 iv32,
1583                              u16 *phase1key)
1584 {
1585         struct iwl_mvm_sta *mvm_sta;
1586         u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta);
1587         bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1588
1589         if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT))
1590                 return;
1591
1592         rcu_read_lock();
1593
1594         if (!sta) {
1595                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1596                 if (WARN_ON(IS_ERR_OR_NULL(sta))) {
1597                         rcu_read_unlock();
1598                         return;
1599                 }
1600         }
1601
1602         mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1603         iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1604                              iv32, phase1key, CMD_ASYNC);
1605         rcu_read_unlock();
1606 }
1607
1608 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
1609                                 struct ieee80211_sta *sta)
1610 {
1611         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1612         struct iwl_mvm_add_sta_cmd cmd = {
1613                 .add_modify = STA_MODE_MODIFY,
1614                 .sta_id = mvmsta->sta_id,
1615                 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
1616                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1617         };
1618         int ret;
1619
1620         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1621         if (ret)
1622                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1623 }
1624
1625 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
1626                                        struct ieee80211_sta *sta,
1627                                        enum ieee80211_frame_release_type reason,
1628                                        u16 cnt, u16 tids, bool more_data,
1629                                        bool agg)
1630 {
1631         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1632         struct iwl_mvm_add_sta_cmd cmd = {
1633                 .add_modify = STA_MODE_MODIFY,
1634                 .sta_id = mvmsta->sta_id,
1635                 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
1636                 .sleep_tx_count = cpu_to_le16(cnt),
1637                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1638         };
1639         int tid, ret;
1640         unsigned long _tids = tids;
1641
1642         /* convert TIDs to ACs - we don't support TSPEC so that's OK
1643          * Note that this field is reserved and unused by firmware not
1644          * supporting GO uAPSD, so it's safe to always do this.
1645          */
1646         for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
1647                 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
1648
1649         /* If we're releasing frames from aggregation queues then check if the
1650          * all queues combined that we're releasing frames from have
1651          *  - more frames than the service period, in which case more_data
1652          *    needs to be set
1653          *  - fewer than 'cnt' frames, in which case we need to adjust the
1654          *    firmware command (but do that unconditionally)
1655          */
1656         if (agg) {
1657                 int remaining = cnt;
1658
1659                 spin_lock_bh(&mvmsta->lock);
1660                 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
1661                         struct iwl_mvm_tid_data *tid_data;
1662                         u16 n_queued;
1663
1664                         tid_data = &mvmsta->tid_data[tid];
1665                         if (WARN(tid_data->state != IWL_AGG_ON &&
1666                                  tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
1667                                  "TID %d state is %d\n",
1668                                  tid, tid_data->state)) {
1669                                 spin_unlock_bh(&mvmsta->lock);
1670                                 ieee80211_sta_eosp(sta);
1671                                 return;
1672                         }
1673
1674                         n_queued = iwl_mvm_tid_queued(tid_data);
1675                         if (n_queued > remaining) {
1676                                 more_data = true;
1677                                 remaining = 0;
1678                                 break;
1679                         }
1680                         remaining -= n_queued;
1681                 }
1682                 spin_unlock_bh(&mvmsta->lock);
1683
1684                 cmd.sleep_tx_count = cpu_to_le16(cnt - remaining);
1685                 if (WARN_ON(cnt - remaining == 0)) {
1686                         ieee80211_sta_eosp(sta);
1687                         return;
1688                 }
1689         }
1690
1691         /* Note: this is ignored by firmware not supporting GO uAPSD */
1692         if (more_data)
1693                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
1694
1695         if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
1696                 mvmsta->next_status_eosp = true;
1697                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
1698         } else {
1699                 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
1700         }
1701
1702         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1703         if (ret)
1704                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1705 }
1706
1707 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
1708                            struct iwl_rx_cmd_buffer *rxb)
1709 {
1710         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1711         struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
1712         struct ieee80211_sta *sta;
1713         u32 sta_id = le32_to_cpu(notif->sta_id);
1714
1715         if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
1716                 return;
1717
1718         rcu_read_lock();
1719         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1720         if (!IS_ERR_OR_NULL(sta))
1721                 ieee80211_sta_eosp(sta);
1722         rcu_read_unlock();
1723 }
1724
1725 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
1726                                    struct iwl_mvm_sta *mvmsta, bool disable)
1727 {
1728         struct iwl_mvm_add_sta_cmd cmd = {
1729                 .add_modify = STA_MODE_MODIFY,
1730                 .sta_id = mvmsta->sta_id,
1731                 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
1732                 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
1733                 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
1734         };
1735         int ret;
1736
1737         ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd);
1738         if (ret)
1739                 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
1740 }
1741
1742 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
1743                                       struct ieee80211_sta *sta,
1744                                       bool disable)
1745 {
1746         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1747
1748         spin_lock_bh(&mvm_sta->lock);
1749
1750         if (mvm_sta->disable_tx == disable) {
1751                 spin_unlock_bh(&mvm_sta->lock);
1752                 return;
1753         }
1754
1755         mvm_sta->disable_tx = disable;
1756
1757         /*
1758          * Tell mac80211 to start/stop queuing tx for this station,
1759          * but don't stop queuing if there are still pending frames
1760          * for this station.
1761          */
1762         if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
1763                 ieee80211_sta_block_awake(mvm->hw, sta, disable);
1764
1765         iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
1766
1767         spin_unlock_bh(&mvm_sta->lock);
1768 }
1769
1770 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
1771                                        struct iwl_mvm_vif *mvmvif,
1772                                        bool disable)
1773 {
1774         struct ieee80211_sta *sta;
1775         struct iwl_mvm_sta *mvm_sta;
1776         int i;
1777
1778         lockdep_assert_held(&mvm->mutex);
1779
1780         /* Block/unblock all the stations of the given mvmvif */
1781         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1782                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1783                                                 lockdep_is_held(&mvm->mutex));
1784                 if (IS_ERR_OR_NULL(sta))
1785                         continue;
1786
1787                 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1788                 if (mvm_sta->mac_id_n_color !=
1789                     FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
1790                         continue;
1791
1792                 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
1793         }
1794 }
1795
1796 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1797 {
1798         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1799         struct iwl_mvm_sta *mvmsta;
1800
1801         rcu_read_lock();
1802
1803         mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
1804
1805         if (!WARN_ON(!mvmsta))
1806                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
1807
1808         rcu_read_unlock();
1809 }