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iwlwifi: mvm: use helpers to get iwl_mvm_sta
[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 *
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41 * modification, are permitted provided that the following conditions
42 * are met:
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44 * * Redistributions of source code must retain the above copyright
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48 * the documentation and/or other materials provided with the
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60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
314 struct ieee80211_sta *sta, u8 ac, int tid,
315 struct ieee80211_hdr *hdr)
316 {
317 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
318 struct iwl_trans_txq_scd_cfg cfg = {
319 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
320 .sta_id = mvmsta->sta_id,
321 .tid = tid,
322 .frame_limit = IWL_FRAME_LIMIT,
323 };
324 unsigned int wdg_timeout =
325 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
326 u8 mac_queue = mvmsta->vif->hw_queue[ac];
327 int queue = -1;
328 int ssn;
329
330 lockdep_assert_held(&mvm->mutex);
331
332 spin_lock_bh(&mvm->queue_info_lock);
333
334 /*
335 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
336 * exists
337 */
338 if (!ieee80211_is_data_qos(hdr->frame_control) ||
339 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
340 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE,
341 IWL_MVM_DQA_MAX_MGMT_QUEUE);
342 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
343 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
344 queue);
345
346 /* If no such queue is found, we'll use a DATA queue instead */
347 }
348
349 if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
350 queue = mvmsta->reserved_queue;
351 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
352 }
353
354 if (queue < 0)
355 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
356 IWL_MVM_DQA_MAX_DATA_QUEUE);
357 if (queue >= 0)
358 mvm->queue_info[queue].setup_reserved = false;
359
360 spin_unlock_bh(&mvm->queue_info_lock);
361
362 /* TODO: support shared queues for same RA */
363 if (queue < 0)
364 return -ENOSPC;
365
366 /*
367 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
368 * but for configuring the SCD to send A-MPDUs we need to mark the queue
369 * as aggregatable.
370 * Mark all DATA queues as allowing to be aggregated at some point
371 */
372 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
373 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
374
375 IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n",
376 queue, mvmsta->sta_id, tid);
377
378 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
379 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
380 wdg_timeout);
381
382 spin_lock_bh(&mvmsta->lock);
383 mvmsta->tid_data[tid].txq_id = queue;
384 mvmsta->tfd_queue_msk |= BIT(queue);
385
386 if (mvmsta->reserved_queue == queue)
387 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
388 spin_unlock_bh(&mvmsta->lock);
389
390 return iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
391 }
392
393 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
394 {
395 if (tid == IWL_MAX_TID_COUNT)
396 return IEEE80211_AC_VO; /* MGMT */
397
398 return tid_to_mac80211_ac[tid];
399 }
400
401 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
402 struct ieee80211_sta *sta, int tid)
403 {
404 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
405 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
406 struct sk_buff *skb;
407 struct ieee80211_hdr *hdr;
408 struct sk_buff_head deferred_tx;
409 u8 mac_queue;
410 bool no_queue = false; /* Marks if there is a problem with the queue */
411 u8 ac;
412
413 lockdep_assert_held(&mvm->mutex);
414
415 skb = skb_peek(&tid_data->deferred_tx_frames);
416 if (!skb)
417 return;
418 hdr = (void *)skb->data;
419
420 ac = iwl_mvm_tid_to_ac_queue(tid);
421 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
422
423 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
424 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
425 IWL_ERR(mvm,
426 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
427 mvmsta->sta_id, tid);
428
429 /*
430 * Mark queue as problematic so later the deferred traffic is
431 * freed, as we can do nothing with it
432 */
433 no_queue = true;
434 }
435
436 __skb_queue_head_init(&deferred_tx);
437
438 /* Disable bottom-halves when entering TX path */
439 local_bh_disable();
440 spin_lock(&mvmsta->lock);
441 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
442 spin_unlock(&mvmsta->lock);
443
444 while ((skb = __skb_dequeue(&deferred_tx)))
445 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
446 ieee80211_free_txskb(mvm->hw, skb);
447 local_bh_enable();
448
449 /* Wake queue */
450 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
451 }
452
453 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
454 {
455 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
456 add_stream_wk);
457 struct ieee80211_sta *sta;
458 struct iwl_mvm_sta *mvmsta;
459 unsigned long deferred_tid_traffic;
460 int sta_id, tid;
461
462 mutex_lock(&mvm->mutex);
463
464 /* Go over all stations with deferred traffic */
465 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
466 IWL_MVM_STATION_COUNT) {
467 clear_bit(sta_id, mvm->sta_deferred_frames);
468 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
469 lockdep_is_held(&mvm->mutex));
470 if (IS_ERR_OR_NULL(sta))
471 continue;
472
473 mvmsta = iwl_mvm_sta_from_mac80211(sta);
474 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
475
476 for_each_set_bit(tid, &deferred_tid_traffic,
477 IWL_MAX_TID_COUNT + 1)
478 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
479 }
480
481 mutex_unlock(&mvm->mutex);
482 }
483
484 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
485 struct ieee80211_sta *sta,
486 enum nl80211_iftype vif_type)
487 {
488 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
489 int queue;
490
491 spin_lock_bh(&mvm->queue_info_lock);
492
493 /* Make sure we have free resources for this STA */
494 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
495 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
496 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].setup_reserved)
497 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
498 else
499 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
500 IWL_MVM_DQA_MAX_DATA_QUEUE);
501 if (queue < 0) {
502 spin_unlock_bh(&mvm->queue_info_lock);
503 IWL_ERR(mvm, "No available queues for new station\n");
504 return -ENOSPC;
505 }
506 mvm->queue_info[queue].setup_reserved = true;
507
508 spin_unlock_bh(&mvm->queue_info_lock);
509
510 mvmsta->reserved_queue = queue;
511
512 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
513 queue, mvmsta->sta_id);
514
515 return 0;
516 }
517
518 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
519 struct ieee80211_vif *vif,
520 struct ieee80211_sta *sta)
521 {
522 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
523 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
524 struct iwl_mvm_rxq_dup_data *dup_data;
525 int i, ret, sta_id;
526
527 lockdep_assert_held(&mvm->mutex);
528
529 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
530 sta_id = iwl_mvm_find_free_sta_id(mvm,
531 ieee80211_vif_type_p2p(vif));
532 else
533 sta_id = mvm_sta->sta_id;
534
535 if (sta_id == IWL_MVM_STATION_COUNT)
536 return -ENOSPC;
537
538 spin_lock_init(&mvm_sta->lock);
539
540 mvm_sta->sta_id = sta_id;
541 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
542 mvmvif->color);
543 mvm_sta->vif = vif;
544 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
545 mvm_sta->tx_protection = 0;
546 mvm_sta->tt_tx_protection = false;
547
548 /* HW restart, don't assume the memory has been zeroed */
549 atomic_set(&mvm->pending_frames[sta_id], 0);
550 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
551 mvm_sta->tfd_queue_msk = 0;
552
553 /* allocate new queues for a TDLS station */
554 if (sta->tdls) {
555 ret = iwl_mvm_tdls_sta_init(mvm, sta);
556 if (ret)
557 return ret;
558 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
559 for (i = 0; i < IEEE80211_NUM_ACS; i++)
560 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
561 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
562 }
563
564 /* for HW restart - reset everything but the sequence number */
565 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
566 u16 seq = mvm_sta->tid_data[i].seq_number;
567 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
568 mvm_sta->tid_data[i].seq_number = seq;
569
570 if (!iwl_mvm_is_dqa_supported(mvm))
571 continue;
572
573 /*
574 * Mark all queues for this STA as unallocated and defer TX
575 * frames until the queue is allocated
576 */
577 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
578 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
579 }
580 mvm_sta->deferred_traffic_tid_map = 0;
581 mvm_sta->agg_tids = 0;
582
583 if (iwl_mvm_has_new_rx_api(mvm) &&
584 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
585 dup_data = kcalloc(mvm->trans->num_rx_queues,
586 sizeof(*dup_data),
587 GFP_KERNEL);
588 if (!dup_data)
589 return -ENOMEM;
590 mvm_sta->dup_data = dup_data;
591 }
592
593 if (iwl_mvm_is_dqa_supported(mvm)) {
594 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
595 ieee80211_vif_type_p2p(vif));
596 if (ret)
597 goto err;
598 }
599
600 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
601 if (ret)
602 goto err;
603
604 if (vif->type == NL80211_IFTYPE_STATION) {
605 if (!sta->tdls) {
606 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
607 mvmvif->ap_sta_id = sta_id;
608 } else {
609 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
610 }
611 }
612
613 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
614
615 return 0;
616
617 err:
618 iwl_mvm_tdls_sta_deinit(mvm, sta);
619 return ret;
620 }
621
622 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
623 struct ieee80211_vif *vif,
624 struct ieee80211_sta *sta)
625 {
626 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
627 }
628
629 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
630 bool drain)
631 {
632 struct iwl_mvm_add_sta_cmd cmd = {};
633 int ret;
634 u32 status;
635
636 lockdep_assert_held(&mvm->mutex);
637
638 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
639 cmd.sta_id = mvmsta->sta_id;
640 cmd.add_modify = STA_MODE_MODIFY;
641 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
642 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
643
644 status = ADD_STA_SUCCESS;
645 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
646 iwl_mvm_add_sta_cmd_size(mvm),
647 &cmd, &status);
648 if (ret)
649 return ret;
650
651 switch (status & IWL_ADD_STA_STATUS_MASK) {
652 case ADD_STA_SUCCESS:
653 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
654 mvmsta->sta_id);
655 break;
656 default:
657 ret = -EIO;
658 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
659 mvmsta->sta_id);
660 break;
661 }
662
663 return ret;
664 }
665
666 /*
667 * Remove a station from the FW table. Before sending the command to remove
668 * the station validate that the station is indeed known to the driver (sanity
669 * only).
670 */
671 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
672 {
673 struct ieee80211_sta *sta;
674 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
675 .sta_id = sta_id,
676 };
677 int ret;
678
679 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
680 lockdep_is_held(&mvm->mutex));
681
682 /* Note: internal stations are marked as error values */
683 if (!sta) {
684 IWL_ERR(mvm, "Invalid station id\n");
685 return -EINVAL;
686 }
687
688 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
689 sizeof(rm_sta_cmd), &rm_sta_cmd);
690 if (ret) {
691 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
692 return ret;
693 }
694
695 return 0;
696 }
697
698 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
699 {
700 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
701 u8 sta_id;
702
703 /*
704 * The mutex is needed because of the SYNC cmd, but not only: if the
705 * work would run concurrently with iwl_mvm_rm_sta, it would run before
706 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
707 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
708 * that later.
709 */
710 mutex_lock(&mvm->mutex);
711
712 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
713 int ret;
714 struct ieee80211_sta *sta =
715 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
716 lockdep_is_held(&mvm->mutex));
717
718 /*
719 * This station is in use or RCU-removed; the latter happens in
720 * managed mode, where mac80211 removes the station before we
721 * can remove it from firmware (we can only do that after the
722 * MAC is marked unassociated), and possibly while the deauth
723 * frame to disconnect from the AP is still queued. Then, the
724 * station pointer is -ENOENT when the last skb is reclaimed.
725 */
726 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
727 continue;
728
729 if (PTR_ERR(sta) == -EINVAL) {
730 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
731 sta_id);
732 continue;
733 }
734
735 if (!sta) {
736 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
737 sta_id);
738 continue;
739 }
740
741 WARN_ON(PTR_ERR(sta) != -EBUSY);
742 /* This station was removed and we waited until it got drained,
743 * we can now proceed and remove it.
744 */
745 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
746 if (ret) {
747 IWL_ERR(mvm,
748 "Couldn't remove sta %d after it was drained\n",
749 sta_id);
750 continue;
751 }
752 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
753 clear_bit(sta_id, mvm->sta_drained);
754
755 if (mvm->tfd_drained[sta_id]) {
756 unsigned long i, msk = mvm->tfd_drained[sta_id];
757
758 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
759 iwl_mvm_disable_txq(mvm, i, i,
760 IWL_MAX_TID_COUNT, 0);
761
762 mvm->tfd_drained[sta_id] = 0;
763 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
764 sta_id, msk);
765 }
766 }
767
768 mutex_unlock(&mvm->mutex);
769 }
770
771 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
772 struct ieee80211_vif *vif,
773 struct iwl_mvm_sta *mvm_sta)
774 {
775 int ac;
776 int i;
777
778 lockdep_assert_held(&mvm->mutex);
779
780 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
781 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
782 continue;
783
784 ac = iwl_mvm_tid_to_ac_queue(i);
785 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
786 vif->hw_queue[ac], i, 0);
787 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
788 }
789 }
790
791 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
792 struct ieee80211_vif *vif,
793 struct ieee80211_sta *sta)
794 {
795 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
796 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
797 int ret;
798
799 lockdep_assert_held(&mvm->mutex);
800
801 if (iwl_mvm_has_new_rx_api(mvm))
802 kfree(mvm_sta->dup_data);
803
804 if (vif->type == NL80211_IFTYPE_STATION &&
805 mvmvif->ap_sta_id == mvm_sta->sta_id) {
806 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
807 if (ret)
808 return ret;
809 /* flush its queues here since we are freeing mvm_sta */
810 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
811 if (ret)
812 return ret;
813 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
814 mvm_sta->tfd_queue_msk);
815 if (ret)
816 return ret;
817 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
818
819 /* If DQA is supported - the queues can be disabled now */
820 if (iwl_mvm_is_dqa_supported(mvm))
821 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
822
823 /* if we are associated - we can't remove the AP STA now */
824 if (vif->bss_conf.assoc)
825 return ret;
826
827 /* unassoc - go ahead - remove the AP STA now */
828 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
829
830 /* clear d0i3_ap_sta_id if no longer relevant */
831 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
832 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
833 }
834
835 /*
836 * This shouldn't happen - the TDLS channel switch should be canceled
837 * before the STA is removed.
838 */
839 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
840 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
841 cancel_delayed_work(&mvm->tdls_cs.dwork);
842 }
843
844 /*
845 * Make sure that the tx response code sees the station as -EBUSY and
846 * calls the drain worker.
847 */
848 spin_lock_bh(&mvm_sta->lock);
849 /*
850 * There are frames pending on the AC queues for this station.
851 * We need to wait until all the frames are drained...
852 */
853 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
854 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
855 ERR_PTR(-EBUSY));
856 spin_unlock_bh(&mvm_sta->lock);
857
858 /* disable TDLS sta queues on drain complete */
859 if (sta->tdls) {
860 mvm->tfd_drained[mvm_sta->sta_id] =
861 mvm_sta->tfd_queue_msk;
862 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
863 mvm_sta->sta_id);
864 }
865
866 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
867 } else {
868 spin_unlock_bh(&mvm_sta->lock);
869
870 if (sta->tdls)
871 iwl_mvm_tdls_sta_deinit(mvm, sta);
872
873 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
874 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
875 }
876
877 return ret;
878 }
879
880 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
881 struct ieee80211_vif *vif,
882 u8 sta_id)
883 {
884 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
885
886 lockdep_assert_held(&mvm->mutex);
887
888 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
889 return ret;
890 }
891
892 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
893 struct iwl_mvm_int_sta *sta,
894 u32 qmask, enum nl80211_iftype iftype)
895 {
896 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
897 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
898 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
899 return -ENOSPC;
900 }
901
902 sta->tfd_queue_msk = qmask;
903
904 /* put a non-NULL value so iterating over the stations won't stop */
905 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
906 return 0;
907 }
908
909 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
910 struct iwl_mvm_int_sta *sta)
911 {
912 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
913 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
914 sta->sta_id = IWL_MVM_STATION_COUNT;
915 }
916
917 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
918 struct iwl_mvm_int_sta *sta,
919 const u8 *addr,
920 u16 mac_id, u16 color)
921 {
922 struct iwl_mvm_add_sta_cmd cmd;
923 int ret;
924 u32 status;
925
926 lockdep_assert_held(&mvm->mutex);
927
928 memset(&cmd, 0, sizeof(cmd));
929 cmd.sta_id = sta->sta_id;
930 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
931 color));
932
933 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
934 cmd.tid_disable_tx = cpu_to_le16(0xffff);
935
936 if (addr)
937 memcpy(cmd.addr, addr, ETH_ALEN);
938
939 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
940 iwl_mvm_add_sta_cmd_size(mvm),
941 &cmd, &status);
942 if (ret)
943 return ret;
944
945 switch (status & IWL_ADD_STA_STATUS_MASK) {
946 case ADD_STA_SUCCESS:
947 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
948 return 0;
949 default:
950 ret = -EIO;
951 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
952 status);
953 break;
954 }
955 return ret;
956 }
957
958 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
959 {
960 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
961 mvm->cfg->base_params->wd_timeout :
962 IWL_WATCHDOG_DISABLED;
963 int ret;
964
965 lockdep_assert_held(&mvm->mutex);
966
967 /* Map Aux queue to fifo - needs to happen before adding Aux station */
968 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
969 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
970
971 /* Allocate aux station and assign to it the aux queue */
972 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
973 NL80211_IFTYPE_UNSPECIFIED);
974 if (ret)
975 return ret;
976
977 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
978 MAC_INDEX_AUX, 0);
979
980 if (ret)
981 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
982 return ret;
983 }
984
985 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
986 {
987 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
988
989 lockdep_assert_held(&mvm->mutex);
990 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
991 mvmvif->id, 0);
992 }
993
994 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
995 {
996 int ret;
997
998 lockdep_assert_held(&mvm->mutex);
999
1000 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1001 if (ret)
1002 IWL_WARN(mvm, "Failed sending remove station\n");
1003
1004 return ret;
1005 }
1006
1007 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1008 {
1009 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1010 }
1011
1012 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1013 {
1014 lockdep_assert_held(&mvm->mutex);
1015
1016 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1017 }
1018
1019 /*
1020 * Send the add station command for the vif's broadcast station.
1021 * Assumes that the station was already allocated.
1022 *
1023 * @mvm: the mvm component
1024 * @vif: the interface to which the broadcast station is added
1025 * @bsta: the broadcast station to add.
1026 */
1027 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1028 {
1029 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1030 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1031 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1032 const u8 *baddr = _baddr;
1033
1034 lockdep_assert_held(&mvm->mutex);
1035
1036 if (iwl_mvm_is_dqa_supported(mvm)) {
1037 struct iwl_trans_txq_scd_cfg cfg = {
1038 .fifo = IWL_MVM_TX_FIFO_VO,
1039 .sta_id = mvmvif->bcast_sta.sta_id,
1040 .tid = IWL_MAX_TID_COUNT,
1041 .aggregate = false,
1042 .frame_limit = IWL_FRAME_LIMIT,
1043 };
1044 unsigned int wdg_timeout =
1045 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1046 int queue;
1047
1048 if ((vif->type == NL80211_IFTYPE_AP) &&
1049 (mvmvif->bcast_sta.tfd_queue_msk &
1050 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1051 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1052 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1053 (mvmvif->bcast_sta.tfd_queue_msk &
1054 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1055 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1056 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1057 return -EINVAL;
1058
1059 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1060 wdg_timeout);
1061 }
1062
1063 if (vif->type == NL80211_IFTYPE_ADHOC)
1064 baddr = vif->bss_conf.bssid;
1065
1066 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1067 return -ENOSPC;
1068
1069 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1070 mvmvif->id, mvmvif->color);
1071 }
1072
1073 /* Send the FW a request to remove the station from it's internal data
1074 * structures, but DO NOT remove the entry from the local data structures. */
1075 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1076 {
1077 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1078 int ret;
1079
1080 lockdep_assert_held(&mvm->mutex);
1081
1082 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1083 if (ret)
1084 IWL_WARN(mvm, "Failed sending remove station\n");
1085 return ret;
1086 }
1087
1088 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1089 {
1090 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1091 u32 qmask = 0;
1092
1093 lockdep_assert_held(&mvm->mutex);
1094
1095 if (!iwl_mvm_is_dqa_supported(mvm))
1096 qmask = iwl_mvm_mac_get_queues_mask(vif);
1097
1098 if (vif->type == NL80211_IFTYPE_AP) {
1099 /*
1100 * The firmware defines the TFD queue mask to only be relevant
1101 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1102 * be included.
1103 */
1104 qmask &= ~BIT(vif->cab_queue);
1105
1106 if (iwl_mvm_is_dqa_supported(mvm))
1107 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1108 } else if (iwl_mvm_is_dqa_supported(mvm) &&
1109 vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1110 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1111 }
1112
1113 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1114 ieee80211_vif_type_p2p(vif));
1115 }
1116
1117 /* Allocate a new station entry for the broadcast station to the given vif,
1118 * and send it to the FW.
1119 * Note that each P2P mac should have its own broadcast station.
1120 *
1121 * @mvm: the mvm component
1122 * @vif: the interface to which the broadcast station is added
1123 * @bsta: the broadcast station to add. */
1124 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1125 {
1126 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1127 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1128 int ret;
1129
1130 lockdep_assert_held(&mvm->mutex);
1131
1132 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1133 if (ret)
1134 return ret;
1135
1136 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1137
1138 if (ret)
1139 iwl_mvm_dealloc_int_sta(mvm, bsta);
1140
1141 return ret;
1142 }
1143
1144 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1145 {
1146 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1147
1148 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1149 }
1150
1151 /*
1152 * Send the FW a request to remove the station from it's internal data
1153 * structures, and in addition remove it from the local data structure.
1154 */
1155 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1156 {
1157 int ret;
1158
1159 lockdep_assert_held(&mvm->mutex);
1160
1161 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1162
1163 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1164
1165 return ret;
1166 }
1167
1168 #define IWL_MAX_RX_BA_SESSIONS 16
1169
1170 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1171 {
1172 struct iwl_mvm_delba_notif notif = {
1173 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1174 .metadata.sync = 1,
1175 .delba.baid = baid,
1176 };
1177 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1178 };
1179
1180 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1181 struct iwl_mvm_baid_data *data)
1182 {
1183 int i;
1184
1185 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1186
1187 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1188 int j;
1189 struct iwl_mvm_reorder_buffer *reorder_buf =
1190 &data->reorder_buf[i];
1191
1192 spin_lock_bh(&reorder_buf->lock);
1193 if (likely(!reorder_buf->num_stored)) {
1194 spin_unlock_bh(&reorder_buf->lock);
1195 continue;
1196 }
1197
1198 /*
1199 * This shouldn't happen in regular DELBA since the internal
1200 * delBA notification should trigger a release of all frames in
1201 * the reorder buffer.
1202 */
1203 WARN_ON(1);
1204
1205 for (j = 0; j < reorder_buf->buf_size; j++)
1206 __skb_queue_purge(&reorder_buf->entries[j]);
1207 /*
1208 * Prevent timer re-arm. This prevents a very far fetched case
1209 * where we timed out on the notification. There may be prior
1210 * RX frames pending in the RX queue before the notification
1211 * that might get processed between now and the actual deletion
1212 * and we would re-arm the timer although we are deleting the
1213 * reorder buffer.
1214 */
1215 reorder_buf->removed = true;
1216 spin_unlock_bh(&reorder_buf->lock);
1217 del_timer_sync(&reorder_buf->reorder_timer);
1218 }
1219 }
1220
1221 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1222 u32 sta_id,
1223 struct iwl_mvm_baid_data *data,
1224 u16 ssn, u8 buf_size)
1225 {
1226 int i;
1227
1228 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1229 struct iwl_mvm_reorder_buffer *reorder_buf =
1230 &data->reorder_buf[i];
1231 int j;
1232
1233 reorder_buf->num_stored = 0;
1234 reorder_buf->head_sn = ssn;
1235 reorder_buf->buf_size = buf_size;
1236 /* rx reorder timer */
1237 reorder_buf->reorder_timer.function =
1238 iwl_mvm_reorder_timer_expired;
1239 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1240 init_timer(&reorder_buf->reorder_timer);
1241 spin_lock_init(&reorder_buf->lock);
1242 reorder_buf->mvm = mvm;
1243 reorder_buf->queue = i;
1244 reorder_buf->sta_id = sta_id;
1245 for (j = 0; j < reorder_buf->buf_size; j++)
1246 __skb_queue_head_init(&reorder_buf->entries[j]);
1247 }
1248 }
1249
1250 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1251 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1252 {
1253 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1254 struct iwl_mvm_add_sta_cmd cmd = {};
1255 struct iwl_mvm_baid_data *baid_data = NULL;
1256 int ret;
1257 u32 status;
1258
1259 lockdep_assert_held(&mvm->mutex);
1260
1261 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1262 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1263 return -ENOSPC;
1264 }
1265
1266 if (iwl_mvm_has_new_rx_api(mvm) && start) {
1267 /*
1268 * Allocate here so if allocation fails we can bail out early
1269 * before starting the BA session in the firmware
1270 */
1271 baid_data = kzalloc(sizeof(*baid_data) +
1272 mvm->trans->num_rx_queues *
1273 sizeof(baid_data->reorder_buf[0]),
1274 GFP_KERNEL);
1275 if (!baid_data)
1276 return -ENOMEM;
1277 }
1278
1279 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1280 cmd.sta_id = mvm_sta->sta_id;
1281 cmd.add_modify = STA_MODE_MODIFY;
1282 if (start) {
1283 cmd.add_immediate_ba_tid = (u8) tid;
1284 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1285 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1286 } else {
1287 cmd.remove_immediate_ba_tid = (u8) tid;
1288 }
1289 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1290 STA_MODIFY_REMOVE_BA_TID;
1291
1292 status = ADD_STA_SUCCESS;
1293 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1294 iwl_mvm_add_sta_cmd_size(mvm),
1295 &cmd, &status);
1296 if (ret)
1297 goto out_free;
1298
1299 switch (status & IWL_ADD_STA_STATUS_MASK) {
1300 case ADD_STA_SUCCESS:
1301 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1302 start ? "start" : "stopp");
1303 break;
1304 case ADD_STA_IMMEDIATE_BA_FAILURE:
1305 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1306 ret = -ENOSPC;
1307 break;
1308 default:
1309 ret = -EIO;
1310 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1311 start ? "start" : "stopp", status);
1312 break;
1313 }
1314
1315 if (ret)
1316 goto out_free;
1317
1318 if (start) {
1319 u8 baid;
1320
1321 mvm->rx_ba_sessions++;
1322
1323 if (!iwl_mvm_has_new_rx_api(mvm))
1324 return 0;
1325
1326 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1327 ret = -EINVAL;
1328 goto out_free;
1329 }
1330 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1331 IWL_ADD_STA_BAID_SHIFT);
1332 baid_data->baid = baid;
1333 baid_data->timeout = timeout;
1334 baid_data->last_rx = jiffies;
1335 init_timer(&baid_data->session_timer);
1336 baid_data->session_timer.function =
1337 iwl_mvm_rx_agg_session_expired;
1338 baid_data->session_timer.data =
1339 (unsigned long)&mvm->baid_map[baid];
1340 baid_data->mvm = mvm;
1341 baid_data->tid = tid;
1342 baid_data->sta_id = mvm_sta->sta_id;
1343
1344 mvm_sta->tid_to_baid[tid] = baid;
1345 if (timeout)
1346 mod_timer(&baid_data->session_timer,
1347 TU_TO_EXP_TIME(timeout * 2));
1348
1349 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1350 baid_data, ssn, buf_size);
1351 /*
1352 * protect the BA data with RCU to cover a case where our
1353 * internal RX sync mechanism will timeout (not that it's
1354 * supposed to happen) and we will free the session data while
1355 * RX is being processed in parallel
1356 */
1357 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1358 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1359 } else if (mvm->rx_ba_sessions > 0) {
1360 u8 baid = mvm_sta->tid_to_baid[tid];
1361
1362 /* check that restart flow didn't zero the counter */
1363 mvm->rx_ba_sessions--;
1364 if (!iwl_mvm_has_new_rx_api(mvm))
1365 return 0;
1366
1367 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1368 return -EINVAL;
1369
1370 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1371 if (WARN_ON(!baid_data))
1372 return -EINVAL;
1373
1374 /* synchronize all rx queues so we can safely delete */
1375 iwl_mvm_free_reorder(mvm, baid_data);
1376 del_timer_sync(&baid_data->session_timer);
1377 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1378 kfree_rcu(baid_data, rcu_head);
1379 }
1380 return 0;
1381
1382 out_free:
1383 kfree(baid_data);
1384 return ret;
1385 }
1386
1387 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1388 int tid, u8 queue, bool start)
1389 {
1390 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1391 struct iwl_mvm_add_sta_cmd cmd = {};
1392 int ret;
1393 u32 status;
1394
1395 lockdep_assert_held(&mvm->mutex);
1396
1397 if (start) {
1398 mvm_sta->tfd_queue_msk |= BIT(queue);
1399 mvm_sta->tid_disable_agg &= ~BIT(tid);
1400 } else {
1401 mvm_sta->tfd_queue_msk &= ~BIT(queue);
1402 mvm_sta->tid_disable_agg |= BIT(tid);
1403 }
1404
1405 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1406 cmd.sta_id = mvm_sta->sta_id;
1407 cmd.add_modify = STA_MODE_MODIFY;
1408 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1409 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1410 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1411
1412 status = ADD_STA_SUCCESS;
1413 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1414 iwl_mvm_add_sta_cmd_size(mvm),
1415 &cmd, &status);
1416 if (ret)
1417 return ret;
1418
1419 switch (status & IWL_ADD_STA_STATUS_MASK) {
1420 case ADD_STA_SUCCESS:
1421 break;
1422 default:
1423 ret = -EIO;
1424 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1425 start ? "start" : "stopp", status);
1426 break;
1427 }
1428
1429 return ret;
1430 }
1431
1432 const u8 tid_to_mac80211_ac[] = {
1433 IEEE80211_AC_BE,
1434 IEEE80211_AC_BK,
1435 IEEE80211_AC_BK,
1436 IEEE80211_AC_BE,
1437 IEEE80211_AC_VI,
1438 IEEE80211_AC_VI,
1439 IEEE80211_AC_VO,
1440 IEEE80211_AC_VO,
1441 };
1442
1443 static const u8 tid_to_ucode_ac[] = {
1444 AC_BE,
1445 AC_BK,
1446 AC_BK,
1447 AC_BE,
1448 AC_VI,
1449 AC_VI,
1450 AC_VO,
1451 AC_VO,
1452 };
1453
1454 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1455 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1456 {
1457 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1458 struct iwl_mvm_tid_data *tid_data;
1459 int txq_id;
1460 int ret;
1461
1462 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1463 return -EINVAL;
1464
1465 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1466 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1467 mvmsta->tid_data[tid].state);
1468 return -ENXIO;
1469 }
1470
1471 lockdep_assert_held(&mvm->mutex);
1472
1473 spin_lock_bh(&mvmsta->lock);
1474
1475 /* possible race condition - we entered D0i3 while starting agg */
1476 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1477 spin_unlock_bh(&mvmsta->lock);
1478 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1479 return -EIO;
1480 }
1481
1482 spin_lock_bh(&mvm->queue_info_lock);
1483
1484 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1485 mvm->last_agg_queue);
1486 if (txq_id < 0) {
1487 ret = txq_id;
1488 spin_unlock_bh(&mvm->queue_info_lock);
1489 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1490 goto release_locks;
1491 }
1492 mvm->queue_info[txq_id].setup_reserved = true;
1493 spin_unlock_bh(&mvm->queue_info_lock);
1494
1495 tid_data = &mvmsta->tid_data[tid];
1496 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1497 tid_data->txq_id = txq_id;
1498 *ssn = tid_data->ssn;
1499
1500 IWL_DEBUG_TX_QUEUES(mvm,
1501 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1502 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1503 tid_data->next_reclaimed);
1504
1505 if (tid_data->ssn == tid_data->next_reclaimed) {
1506 tid_data->state = IWL_AGG_STARTING;
1507 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1508 } else {
1509 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1510 }
1511
1512 ret = 0;
1513
1514 release_locks:
1515 spin_unlock_bh(&mvmsta->lock);
1516
1517 return ret;
1518 }
1519
1520 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1521 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1522 bool amsdu)
1523 {
1524 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1525 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1526 unsigned int wdg_timeout =
1527 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1528 int queue, ret;
1529 u16 ssn;
1530
1531 struct iwl_trans_txq_scd_cfg cfg = {
1532 .sta_id = mvmsta->sta_id,
1533 .tid = tid,
1534 .frame_limit = buf_size,
1535 .aggregate = true,
1536 };
1537
1538 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1539 != IWL_MAX_TID_COUNT);
1540
1541 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1542
1543 spin_lock_bh(&mvmsta->lock);
1544 ssn = tid_data->ssn;
1545 queue = tid_data->txq_id;
1546 tid_data->state = IWL_AGG_ON;
1547 mvmsta->agg_tids |= BIT(tid);
1548 tid_data->ssn = 0xffff;
1549 tid_data->amsdu_in_ampdu_allowed = amsdu;
1550 spin_unlock_bh(&mvmsta->lock);
1551
1552 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1553
1554 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[tid_to_mac80211_ac[tid]],
1555 ssn, &cfg, wdg_timeout);
1556
1557 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1558 if (ret)
1559 return -EIO;
1560
1561 /* No need to mark as reserved */
1562 spin_lock_bh(&mvm->queue_info_lock);
1563 mvm->queue_info[queue].setup_reserved = false;
1564 spin_unlock_bh(&mvm->queue_info_lock);
1565
1566 /*
1567 * Even though in theory the peer could have different
1568 * aggregation reorder buffer sizes for different sessions,
1569 * our ucode doesn't allow for that and has a global limit
1570 * for each station. Therefore, use the minimum of all the
1571 * aggregation sessions and our default value.
1572 */
1573 mvmsta->max_agg_bufsize =
1574 min(mvmsta->max_agg_bufsize, buf_size);
1575 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1576
1577 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1578 sta->addr, tid);
1579
1580 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1581 }
1582
1583 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1584 struct ieee80211_sta *sta, u16 tid)
1585 {
1586 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1587 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1588 u16 txq_id;
1589 int err;
1590
1591
1592 /*
1593 * If mac80211 is cleaning its state, then say that we finished since
1594 * our state has been cleared anyway.
1595 */
1596 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1597 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1598 return 0;
1599 }
1600
1601 spin_lock_bh(&mvmsta->lock);
1602
1603 txq_id = tid_data->txq_id;
1604
1605 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1606 mvmsta->sta_id, tid, txq_id, tid_data->state);
1607
1608 mvmsta->agg_tids &= ~BIT(tid);
1609
1610 /* No need to mark as reserved anymore */
1611 spin_lock_bh(&mvm->queue_info_lock);
1612 mvm->queue_info[txq_id].setup_reserved = false;
1613 spin_unlock_bh(&mvm->queue_info_lock);
1614
1615 switch (tid_data->state) {
1616 case IWL_AGG_ON:
1617 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1618
1619 IWL_DEBUG_TX_QUEUES(mvm,
1620 "ssn = %d, next_recl = %d\n",
1621 tid_data->ssn, tid_data->next_reclaimed);
1622
1623 /* There are still packets for this RA / TID in the HW */
1624 if (tid_data->ssn != tid_data->next_reclaimed) {
1625 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1626 err = 0;
1627 break;
1628 }
1629
1630 tid_data->ssn = 0xffff;
1631 tid_data->state = IWL_AGG_OFF;
1632 spin_unlock_bh(&mvmsta->lock);
1633
1634 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1635
1636 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1637
1638 iwl_mvm_disable_txq(mvm, txq_id,
1639 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1640 0);
1641 return 0;
1642 case IWL_AGG_STARTING:
1643 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1644 /*
1645 * The agg session has been stopped before it was set up. This
1646 * can happen when the AddBA timer times out for example.
1647 */
1648
1649 /* No barriers since we are under mutex */
1650 lockdep_assert_held(&mvm->mutex);
1651
1652 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1653 tid_data->state = IWL_AGG_OFF;
1654 err = 0;
1655 break;
1656 default:
1657 IWL_ERR(mvm,
1658 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1659 mvmsta->sta_id, tid, tid_data->state);
1660 IWL_ERR(mvm,
1661 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1662 err = -EINVAL;
1663 }
1664
1665 spin_unlock_bh(&mvmsta->lock);
1666
1667 return err;
1668 }
1669
1670 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1671 struct ieee80211_sta *sta, u16 tid)
1672 {
1673 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1674 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1675 u16 txq_id;
1676 enum iwl_mvm_agg_state old_state;
1677
1678 /*
1679 * First set the agg state to OFF to avoid calling
1680 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1681 */
1682 spin_lock_bh(&mvmsta->lock);
1683 txq_id = tid_data->txq_id;
1684 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1685 mvmsta->sta_id, tid, txq_id, tid_data->state);
1686 old_state = tid_data->state;
1687 tid_data->state = IWL_AGG_OFF;
1688 mvmsta->agg_tids &= ~BIT(tid);
1689 spin_unlock_bh(&mvmsta->lock);
1690
1691 /* No need to mark as reserved */
1692 spin_lock_bh(&mvm->queue_info_lock);
1693 mvm->queue_info[txq_id].setup_reserved = false;
1694 spin_unlock_bh(&mvm->queue_info_lock);
1695
1696 if (old_state >= IWL_AGG_ON) {
1697 iwl_mvm_drain_sta(mvm, mvmsta, true);
1698 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1699 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1700 iwl_trans_wait_tx_queue_empty(mvm->trans,
1701 mvmsta->tfd_queue_msk);
1702 iwl_mvm_drain_sta(mvm, mvmsta, false);
1703
1704 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1705
1706 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1707 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1708 0);
1709 }
1710
1711 return 0;
1712 }
1713
1714 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1715 {
1716 int i, max = -1, max_offs = -1;
1717
1718 lockdep_assert_held(&mvm->mutex);
1719
1720 /* Pick the unused key offset with the highest 'deleted'
1721 * counter. Every time a key is deleted, all the counters
1722 * are incremented and the one that was just deleted is
1723 * reset to zero. Thus, the highest counter is the one
1724 * that was deleted longest ago. Pick that one.
1725 */
1726 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1727 if (test_bit(i, mvm->fw_key_table))
1728 continue;
1729 if (mvm->fw_key_deleted[i] > max) {
1730 max = mvm->fw_key_deleted[i];
1731 max_offs = i;
1732 }
1733 }
1734
1735 if (max_offs < 0)
1736 return STA_KEY_IDX_INVALID;
1737
1738 return max_offs;
1739 }
1740
1741 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1742 struct ieee80211_vif *vif,
1743 struct ieee80211_sta *sta)
1744 {
1745 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1746
1747 if (sta)
1748 return iwl_mvm_sta_from_mac80211(sta);
1749
1750 /*
1751 * The device expects GTKs for station interfaces to be
1752 * installed as GTKs for the AP station. If we have no
1753 * station ID, then use AP's station ID.
1754 */
1755 if (vif->type == NL80211_IFTYPE_STATION &&
1756 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1757 u8 sta_id = mvmvif->ap_sta_id;
1758
1759 /*
1760 * It is possible that the 'sta' parameter is NULL,
1761 * for example when a GTK is removed - the sta_id will then
1762 * be the AP ID, and no station was passed by mac80211.
1763 */
1764 return iwl_mvm_sta_from_staid_protected(mvm, sta_id);
1765 }
1766
1767 return NULL;
1768 }
1769
1770 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1771 struct iwl_mvm_sta *mvm_sta,
1772 struct ieee80211_key_conf *keyconf, bool mcast,
1773 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1774 u8 key_offset)
1775 {
1776 struct iwl_mvm_add_sta_key_cmd cmd = {};
1777 __le16 key_flags;
1778 int ret;
1779 u32 status;
1780 u16 keyidx;
1781 int i;
1782 u8 sta_id = mvm_sta->sta_id;
1783
1784 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1785 STA_KEY_FLG_KEYID_MSK;
1786 key_flags = cpu_to_le16(keyidx);
1787 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1788
1789 switch (keyconf->cipher) {
1790 case WLAN_CIPHER_SUITE_TKIP:
1791 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1792 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1793 for (i = 0; i < 5; i++)
1794 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1795 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1796 break;
1797 case WLAN_CIPHER_SUITE_CCMP:
1798 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1799 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1800 break;
1801 case WLAN_CIPHER_SUITE_WEP104:
1802 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1803 /* fall through */
1804 case WLAN_CIPHER_SUITE_WEP40:
1805 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1806 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1807 break;
1808 default:
1809 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1810 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1811 }
1812
1813 if (mcast)
1814 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1815
1816 cmd.key_offset = key_offset;
1817 cmd.key_flags = key_flags;
1818 cmd.sta_id = sta_id;
1819
1820 status = ADD_STA_SUCCESS;
1821 if (cmd_flags & CMD_ASYNC)
1822 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1823 sizeof(cmd), &cmd);
1824 else
1825 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1826 &cmd, &status);
1827
1828 switch (status) {
1829 case ADD_STA_SUCCESS:
1830 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1831 break;
1832 default:
1833 ret = -EIO;
1834 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1835 break;
1836 }
1837
1838 return ret;
1839 }
1840
1841 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1842 struct ieee80211_key_conf *keyconf,
1843 u8 sta_id, bool remove_key)
1844 {
1845 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1846
1847 /* verify the key details match the required command's expectations */
1848 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1849 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1850 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1851 return -EINVAL;
1852
1853 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1854 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1855
1856 if (remove_key) {
1857 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1858 } else {
1859 struct ieee80211_key_seq seq;
1860 const u8 *pn;
1861
1862 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1863 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1864 pn = seq.aes_cmac.pn;
1865 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1866 ((u64) pn[4] << 8) |
1867 ((u64) pn[3] << 16) |
1868 ((u64) pn[2] << 24) |
1869 ((u64) pn[1] << 32) |
1870 ((u64) pn[0] << 40));
1871 }
1872
1873 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1874 remove_key ? "removing" : "installing",
1875 igtk_cmd.sta_id);
1876
1877 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1878 sizeof(igtk_cmd), &igtk_cmd);
1879 }
1880
1881
1882 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1883 struct ieee80211_vif *vif,
1884 struct ieee80211_sta *sta)
1885 {
1886 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1887
1888 if (sta)
1889 return sta->addr;
1890
1891 if (vif->type == NL80211_IFTYPE_STATION &&
1892 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1893 u8 sta_id = mvmvif->ap_sta_id;
1894 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1895 lockdep_is_held(&mvm->mutex));
1896 return sta->addr;
1897 }
1898
1899
1900 return NULL;
1901 }
1902
1903 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1904 struct ieee80211_vif *vif,
1905 struct ieee80211_sta *sta,
1906 struct ieee80211_key_conf *keyconf,
1907 u8 key_offset,
1908 bool mcast)
1909 {
1910 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1911 int ret;
1912 const u8 *addr;
1913 struct ieee80211_key_seq seq;
1914 u16 p1k[5];
1915
1916 switch (keyconf->cipher) {
1917 case WLAN_CIPHER_SUITE_TKIP:
1918 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
1919 /* get phase 1 key from mac80211 */
1920 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1921 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1922 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1923 seq.tkip.iv32, p1k, 0, key_offset);
1924 break;
1925 case WLAN_CIPHER_SUITE_CCMP:
1926 case WLAN_CIPHER_SUITE_WEP40:
1927 case WLAN_CIPHER_SUITE_WEP104:
1928 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1929 0, NULL, 0, key_offset);
1930 break;
1931 default:
1932 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
1933 0, NULL, 0, key_offset);
1934 }
1935
1936 return ret;
1937 }
1938
1939 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
1940 struct ieee80211_key_conf *keyconf,
1941 bool mcast)
1942 {
1943 struct iwl_mvm_add_sta_key_cmd cmd = {};
1944 __le16 key_flags;
1945 int ret;
1946 u32 status;
1947
1948 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1949 STA_KEY_FLG_KEYID_MSK);
1950 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
1951 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
1952
1953 if (mcast)
1954 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1955
1956 cmd.key_flags = key_flags;
1957 cmd.key_offset = keyconf->hw_key_idx;
1958 cmd.sta_id = sta_id;
1959
1960 status = ADD_STA_SUCCESS;
1961 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1962 &cmd, &status);
1963
1964 switch (status) {
1965 case ADD_STA_SUCCESS:
1966 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
1967 break;
1968 default:
1969 ret = -EIO;
1970 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
1971 break;
1972 }
1973
1974 return ret;
1975 }
1976
1977 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
1978 struct ieee80211_vif *vif,
1979 struct ieee80211_sta *sta,
1980 struct ieee80211_key_conf *keyconf,
1981 u8 key_offset)
1982 {
1983 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
1984 struct iwl_mvm_sta *mvm_sta;
1985 u8 sta_id;
1986 int ret;
1987 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
1988
1989 lockdep_assert_held(&mvm->mutex);
1990
1991 /* Get the station id from the mvm local station table */
1992 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
1993 if (!mvm_sta) {
1994 IWL_ERR(mvm, "Failed to find station\n");
1995 return -EINVAL;
1996 }
1997 sta_id = mvm_sta->sta_id;
1998
1999 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2000 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2001 goto end;
2002 }
2003
2004 /*
2005 * It is possible that the 'sta' parameter is NULL, and thus
2006 * there is a need to retrieve the sta from the local station table.
2007 */
2008 if (!sta) {
2009 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2010 lockdep_is_held(&mvm->mutex));
2011 if (IS_ERR_OR_NULL(sta)) {
2012 IWL_ERR(mvm, "Invalid station id\n");
2013 return -EINVAL;
2014 }
2015 }
2016
2017 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2018 return -EINVAL;
2019
2020 /* If the key_offset is not pre-assigned, we need to find a
2021 * new offset to use. In normal cases, the offset is not
2022 * pre-assigned, but during HW_RESTART we want to reuse the
2023 * same indices, so we pass them when this function is called.
2024 *
2025 * In D3 entry, we need to hardcoded the indices (because the
2026 * firmware hardcodes the PTK offset to 0). In this case, we
2027 * need to make sure we don't overwrite the hw_key_idx in the
2028 * keyconf structure, because otherwise we cannot configure
2029 * the original ones back when resuming.
2030 */
2031 if (key_offset == STA_KEY_IDX_INVALID) {
2032 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2033 if (key_offset == STA_KEY_IDX_INVALID)
2034 return -ENOSPC;
2035 keyconf->hw_key_idx = key_offset;
2036 }
2037
2038 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2039 if (ret)
2040 goto end;
2041
2042 /*
2043 * For WEP, the same key is used for multicast and unicast. Upload it
2044 * again, using the same key offset, and now pointing the other one
2045 * to the same key slot (offset).
2046 * If this fails, remove the original as well.
2047 */
2048 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2049 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2050 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2051 key_offset, !mcast);
2052 if (ret) {
2053 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2054 goto end;
2055 }
2056 }
2057
2058 __set_bit(key_offset, mvm->fw_key_table);
2059
2060 end:
2061 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2062 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2063 sta ? sta->addr : zero_addr, ret);
2064 return ret;
2065 }
2066
2067 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2068 struct ieee80211_vif *vif,
2069 struct ieee80211_sta *sta,
2070 struct ieee80211_key_conf *keyconf)
2071 {
2072 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2073 struct iwl_mvm_sta *mvm_sta;
2074 u8 sta_id = IWL_MVM_STATION_COUNT;
2075 int ret, i;
2076
2077 lockdep_assert_held(&mvm->mutex);
2078
2079 /* Get the station from the mvm local station table */
2080 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2081
2082 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2083 keyconf->keyidx, sta_id);
2084
2085 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2086 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2087
2088 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2089 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2090 keyconf->hw_key_idx);
2091 return -ENOENT;
2092 }
2093
2094 /* track which key was deleted last */
2095 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2096 if (mvm->fw_key_deleted[i] < U8_MAX)
2097 mvm->fw_key_deleted[i]++;
2098 }
2099 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2100
2101 if (!mvm_sta) {
2102 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2103 return 0;
2104 }
2105
2106 sta_id = mvm_sta->sta_id;
2107
2108 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2109 if (ret)
2110 return ret;
2111
2112 /* delete WEP key twice to get rid of (now useless) offset */
2113 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2114 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2115 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2116
2117 return ret;
2118 }
2119
2120 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2121 struct ieee80211_vif *vif,
2122 struct ieee80211_key_conf *keyconf,
2123 struct ieee80211_sta *sta, u32 iv32,
2124 u16 *phase1key)
2125 {
2126 struct iwl_mvm_sta *mvm_sta;
2127 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2128
2129 rcu_read_lock();
2130
2131 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2132 if (WARN_ON_ONCE(!mvm_sta))
2133 goto unlock;
2134 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2135 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2136
2137 unlock:
2138 rcu_read_unlock();
2139 }
2140
2141 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2142 struct ieee80211_sta *sta)
2143 {
2144 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2145 struct iwl_mvm_add_sta_cmd cmd = {
2146 .add_modify = STA_MODE_MODIFY,
2147 .sta_id = mvmsta->sta_id,
2148 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
2149 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2150 };
2151 int ret;
2152
2153 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2154 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2155 if (ret)
2156 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2157 }
2158
2159 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2160 struct ieee80211_sta *sta,
2161 enum ieee80211_frame_release_type reason,
2162 u16 cnt, u16 tids, bool more_data,
2163 bool agg)
2164 {
2165 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2166 struct iwl_mvm_add_sta_cmd cmd = {
2167 .add_modify = STA_MODE_MODIFY,
2168 .sta_id = mvmsta->sta_id,
2169 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2170 .sleep_tx_count = cpu_to_le16(cnt),
2171 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2172 };
2173 int tid, ret;
2174 unsigned long _tids = tids;
2175
2176 /* convert TIDs to ACs - we don't support TSPEC so that's OK
2177 * Note that this field is reserved and unused by firmware not
2178 * supporting GO uAPSD, so it's safe to always do this.
2179 */
2180 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2181 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2182
2183 /* If we're releasing frames from aggregation queues then check if the
2184 * all queues combined that we're releasing frames from have
2185 * - more frames than the service period, in which case more_data
2186 * needs to be set
2187 * - fewer than 'cnt' frames, in which case we need to adjust the
2188 * firmware command (but do that unconditionally)
2189 */
2190 if (agg) {
2191 int remaining = cnt;
2192 int sleep_tx_count;
2193
2194 spin_lock_bh(&mvmsta->lock);
2195 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2196 struct iwl_mvm_tid_data *tid_data;
2197 u16 n_queued;
2198
2199 tid_data = &mvmsta->tid_data[tid];
2200 if (WARN(tid_data->state != IWL_AGG_ON &&
2201 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2202 "TID %d state is %d\n",
2203 tid, tid_data->state)) {
2204 spin_unlock_bh(&mvmsta->lock);
2205 ieee80211_sta_eosp(sta);
2206 return;
2207 }
2208
2209 n_queued = iwl_mvm_tid_queued(tid_data);
2210 if (n_queued > remaining) {
2211 more_data = true;
2212 remaining = 0;
2213 break;
2214 }
2215 remaining -= n_queued;
2216 }
2217 sleep_tx_count = cnt - remaining;
2218 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2219 mvmsta->sleep_tx_count = sleep_tx_count;
2220 spin_unlock_bh(&mvmsta->lock);
2221
2222 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2223 if (WARN_ON(cnt - remaining == 0)) {
2224 ieee80211_sta_eosp(sta);
2225 return;
2226 }
2227 }
2228
2229 /* Note: this is ignored by firmware not supporting GO uAPSD */
2230 if (more_data)
2231 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2232
2233 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2234 mvmsta->next_status_eosp = true;
2235 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2236 } else {
2237 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2238 }
2239
2240 /* block the Tx queues until the FW updated the sleep Tx count */
2241 iwl_trans_block_txq_ptrs(mvm->trans, true);
2242
2243 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2244 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2245 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2246 if (ret)
2247 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2248 }
2249
2250 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2251 struct iwl_rx_cmd_buffer *rxb)
2252 {
2253 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2254 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2255 struct ieee80211_sta *sta;
2256 u32 sta_id = le32_to_cpu(notif->sta_id);
2257
2258 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2259 return;
2260
2261 rcu_read_lock();
2262 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2263 if (!IS_ERR_OR_NULL(sta))
2264 ieee80211_sta_eosp(sta);
2265 rcu_read_unlock();
2266 }
2267
2268 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2269 struct iwl_mvm_sta *mvmsta, bool disable)
2270 {
2271 struct iwl_mvm_add_sta_cmd cmd = {
2272 .add_modify = STA_MODE_MODIFY,
2273 .sta_id = mvmsta->sta_id,
2274 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2275 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2276 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2277 };
2278 int ret;
2279
2280 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2281 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2282 if (ret)
2283 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2284 }
2285
2286 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2287 struct ieee80211_sta *sta,
2288 bool disable)
2289 {
2290 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2291
2292 spin_lock_bh(&mvm_sta->lock);
2293
2294 if (mvm_sta->disable_tx == disable) {
2295 spin_unlock_bh(&mvm_sta->lock);
2296 return;
2297 }
2298
2299 mvm_sta->disable_tx = disable;
2300
2301 /*
2302 * Tell mac80211 to start/stop queuing tx for this station,
2303 * but don't stop queuing if there are still pending frames
2304 * for this station.
2305 */
2306 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2307 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2308
2309 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2310
2311 spin_unlock_bh(&mvm_sta->lock);
2312 }
2313
2314 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2315 struct iwl_mvm_vif *mvmvif,
2316 bool disable)
2317 {
2318 struct ieee80211_sta *sta;
2319 struct iwl_mvm_sta *mvm_sta;
2320 int i;
2321
2322 lockdep_assert_held(&mvm->mutex);
2323
2324 /* Block/unblock all the stations of the given mvmvif */
2325 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2326 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2327 lockdep_is_held(&mvm->mutex));
2328 if (IS_ERR_OR_NULL(sta))
2329 continue;
2330
2331 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2332 if (mvm_sta->mac_id_n_color !=
2333 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2334 continue;
2335
2336 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2337 }
2338 }
2339
2340 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2341 {
2342 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2343 struct iwl_mvm_sta *mvmsta;
2344
2345 rcu_read_lock();
2346
2347 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2348
2349 if (!WARN_ON(!mvmsta))
2350 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2351
2352 rcu_read_unlock();
2353 }
Linux kernel - Deliverables
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