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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / mvm / sta.c
blob64ef3f3ba23b7d229afaf0ea7f144858abfc398c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 * Copyright(c) 2018 - 2019 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * The full GNU General Public License is included in this distribution
23 * in the file called COPYING.
24 *
25 * Contact Information:
26 * Intel Linux Wireless <linuxwifi@intel.com>
27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *
29 * BSD LICENSE
30 *
31 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
34 * Copyright(c) 2018 - 2019 Intel Corporation
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 *
41 * * Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * * Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in
45 * the documentation and/or other materials provided with the
46 * distribution.
47 * * Neither the name Intel Corporation nor the names of its
48 * contributors may be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *
63 *****************************************************************************/
64 #include <net/mac80211.h>
65
66 #include "mvm.h"
67 #include "sta.h"
68 #include "rs.h"
69
70 /*
71 * New version of ADD_STA_sta command added new fields at the end of the
72 * structure, so sending the size of the relevant API's structure is enough to
73 * support both API versions.
74 */
75 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
76 {
77 if (iwl_mvm_has_new_rx_api(mvm) ||
78 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
79 return sizeof(struct iwl_mvm_add_sta_cmd);
80 else
81 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
82 }
83
84 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
85 enum nl80211_iftype iftype)
86 {
87 int sta_id;
88 u32 reserved_ids = 0;
89
90 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
91 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
92
93 lockdep_assert_held(&mvm->mutex);
94
95 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
96 if (iftype != NL80211_IFTYPE_STATION)
97 reserved_ids = BIT(0);
98
99 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
100 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
101 if (BIT(sta_id) & reserved_ids)
102 continue;
103
104 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
105 lockdep_is_held(&mvm->mutex)))
106 return sta_id;
107 }
108 return IWL_MVM_INVALID_STA;
109 }
110
111 /* send station add/update command to firmware */
112 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
113 bool update, unsigned int flags)
114 {
115 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
116 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
117 .sta_id = mvm_sta->sta_id,
118 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
119 .add_modify = update ? 1 : 0,
120 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
121 STA_FLG_MIMO_EN_MSK |
122 STA_FLG_RTS_MIMO_PROT),
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 (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
130 add_sta_cmd.station_type = mvm_sta->sta_type;
131
132 if (!update || (flags & STA_MODIFY_QUEUES)) {
133 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
134
135 if (!iwl_mvm_has_new_tx_api(mvm)) {
136 add_sta_cmd.tfd_queue_msk =
137 cpu_to_le32(mvm_sta->tfd_queue_msk);
138
139 if (flags & STA_MODIFY_QUEUES)
140 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
141 } else {
142 WARN_ON(flags & STA_MODIFY_QUEUES);
143 }
144 }
145
146 switch (sta->bandwidth) {
147 case IEEE80211_STA_RX_BW_160:
148 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
149 /* fall through */
150 case IEEE80211_STA_RX_BW_80:
151 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
152 /* fall through */
153 case IEEE80211_STA_RX_BW_40:
154 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
155 /* fall through */
156 case IEEE80211_STA_RX_BW_20:
157 if (sta->ht_cap.ht_supported)
158 add_sta_cmd.station_flags |=
159 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
160 break;
161 }
162
163 switch (sta->rx_nss) {
164 case 1:
165 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
166 break;
167 case 2:
168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
169 break;
170 case 3 ... 8:
171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
172 break;
173 }
174
175 switch (sta->smps_mode) {
176 case IEEE80211_SMPS_AUTOMATIC:
177 case IEEE80211_SMPS_NUM_MODES:
178 WARN_ON(1);
179 break;
180 case IEEE80211_SMPS_STATIC:
181 /* override NSS */
182 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
183 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
184 break;
185 case IEEE80211_SMPS_DYNAMIC:
186 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
187 break;
188 case IEEE80211_SMPS_OFF:
189 /* nothing */
190 break;
191 }
192
193 if (sta->ht_cap.ht_supported) {
194 add_sta_cmd.station_flags_msk |=
195 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
196 STA_FLG_AGG_MPDU_DENS_MSK);
197
198 mpdu_dens = sta->ht_cap.ampdu_density;
199 }
200
201 if (sta->vht_cap.vht_supported) {
202 agg_size = sta->vht_cap.cap &
203 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
204 agg_size >>=
205 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
206 } else if (sta->ht_cap.ht_supported) {
207 agg_size = sta->ht_cap.ampdu_factor;
208 }
209
210 add_sta_cmd.station_flags |=
211 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
212 add_sta_cmd.station_flags |=
213 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
214 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
215 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
216
217 if (sta->wme) {
218 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
219
220 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
221 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
223 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
225 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
226 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
227 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
228 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
229 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
230 }
231
232 status = ADD_STA_SUCCESS;
233 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
234 iwl_mvm_add_sta_cmd_size(mvm),
235 &add_sta_cmd, &status);
236 if (ret)
237 return ret;
238
239 switch (status & IWL_ADD_STA_STATUS_MASK) {
240 case ADD_STA_SUCCESS:
241 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
242 break;
243 default:
244 ret = -EIO;
245 IWL_ERR(mvm, "ADD_STA failed\n");
246 break;
247 }
248
249 return ret;
250 }
251
252 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
253 {
254 struct iwl_mvm_baid_data *data =
255 from_timer(data, t, session_timer);
256 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
257 struct iwl_mvm_baid_data *ba_data;
258 struct ieee80211_sta *sta;
259 struct iwl_mvm_sta *mvm_sta;
260 unsigned long timeout;
261
262 rcu_read_lock();
263
264 ba_data = rcu_dereference(*rcu_ptr);
265
266 if (WARN_ON(!ba_data))
267 goto unlock;
268
269 if (!ba_data->timeout)
270 goto unlock;
271
272 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
273 if (time_is_after_jiffies(timeout)) {
274 mod_timer(&ba_data->session_timer, timeout);
275 goto unlock;
276 }
277
278 /* Timer expired */
279 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
280
281 /*
282 * sta should be valid unless the following happens:
283 * The firmware asserts which triggers a reconfig flow, but
284 * the reconfig fails before we set the pointer to sta into
285 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
286 * A-MDPU and hence the timer continues to run. Then, the
287 * timer expires and sta is NULL.
288 */
289 if (!sta)
290 goto unlock;
291
292 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
293 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
294 sta->addr, ba_data->tid);
295 unlock:
296 rcu_read_unlock();
297 }
298
299 /* Disable aggregations for a bitmap of TIDs for a given station */
300 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
301 unsigned long disable_agg_tids,
302 bool remove_queue)
303 {
304 struct iwl_mvm_add_sta_cmd cmd = {};
305 struct ieee80211_sta *sta;
306 struct iwl_mvm_sta *mvmsta;
307 u32 status;
308 u8 sta_id;
309
310 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
311 return -EINVAL;
312
313 sta_id = mvm->queue_info[queue].ra_sta_id;
314
315 rcu_read_lock();
316
317 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
318
319 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
320 rcu_read_unlock();
321 return -EINVAL;
322 }
323
324 mvmsta = iwl_mvm_sta_from_mac80211(sta);
325
326 mvmsta->tid_disable_agg |= disable_agg_tids;
327
328 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
329 cmd.sta_id = mvmsta->sta_id;
330 cmd.add_modify = STA_MODE_MODIFY;
331 cmd.modify_mask = STA_MODIFY_QUEUES;
332 if (disable_agg_tids)
333 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
334 if (remove_queue)
335 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
336 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
337 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
338
339 rcu_read_unlock();
340
341 /* Notify FW of queue removal from the STA queues */
342 status = ADD_STA_SUCCESS;
343 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
344 iwl_mvm_add_sta_cmd_size(mvm),
345 &cmd, &status);
346 }
347
348 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
349 int queue, u8 tid, u8 flags)
350 {
351 struct iwl_scd_txq_cfg_cmd cmd = {
352 .scd_queue = queue,
353 .action = SCD_CFG_DISABLE_QUEUE,
354 };
355 int ret;
356
357 if (iwl_mvm_has_new_tx_api(mvm)) {
358 iwl_trans_txq_free(mvm->trans, queue);
359
360 return 0;
361 }
362
363 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
364 return 0;
365
366 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
367
368 cmd.action = mvm->queue_info[queue].tid_bitmap ?
369 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
370 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
371 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
372
373 IWL_DEBUG_TX_QUEUES(mvm,
374 "Disabling TXQ #%d tids=0x%x\n",
375 queue,
376 mvm->queue_info[queue].tid_bitmap);
377
378 /* If the queue is still enabled - nothing left to do in this func */
379 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
380 return 0;
381
382 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
383 cmd.tid = mvm->queue_info[queue].txq_tid;
384
385 /* Make sure queue info is correct even though we overwrite it */
386 WARN(mvm->queue_info[queue].tid_bitmap,
387 "TXQ #%d info out-of-sync - tids=0x%x\n",
388 queue, mvm->queue_info[queue].tid_bitmap);
389
390 /* If we are here - the queue is freed and we can zero out these vals */
391 mvm->queue_info[queue].tid_bitmap = 0;
392
393 if (sta) {
394 struct iwl_mvm_txq *mvmtxq =
395 iwl_mvm_txq_from_tid(sta, tid);
396
397 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
398 }
399
400 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
401 mvm->queue_info[queue].reserved = false;
402
403 iwl_trans_txq_disable(mvm->trans, queue, false);
404 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
405 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
406
407 if (ret)
408 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
409 queue, ret);
410 return ret;
411 }
412
413 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
414 {
415 struct ieee80211_sta *sta;
416 struct iwl_mvm_sta *mvmsta;
417 unsigned long tid_bitmap;
418 unsigned long agg_tids = 0;
419 u8 sta_id;
420 int tid;
421
422 lockdep_assert_held(&mvm->mutex);
423
424 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
425 return -EINVAL;
426
427 sta_id = mvm->queue_info[queue].ra_sta_id;
428 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
429
430 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
431 lockdep_is_held(&mvm->mutex));
432
433 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
434 return -EINVAL;
435
436 mvmsta = iwl_mvm_sta_from_mac80211(sta);
437
438 spin_lock_bh(&mvmsta->lock);
439 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
440 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
441 agg_tids |= BIT(tid);
442 }
443 spin_unlock_bh(&mvmsta->lock);
444
445 return agg_tids;
446 }
447
448 /*
449 * Remove a queue from a station's resources.
450 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
451 * doesn't disable the queue
452 */
453 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
454 {
455 struct ieee80211_sta *sta;
456 struct iwl_mvm_sta *mvmsta;
457 unsigned long tid_bitmap;
458 unsigned long disable_agg_tids = 0;
459 u8 sta_id;
460 int tid;
461
462 lockdep_assert_held(&mvm->mutex);
463
464 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
465 return -EINVAL;
466
467 sta_id = mvm->queue_info[queue].ra_sta_id;
468 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
469
470 rcu_read_lock();
471
472 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
473
474 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
475 rcu_read_unlock();
476 return 0;
477 }
478
479 mvmsta = iwl_mvm_sta_from_mac80211(sta);
480
481 spin_lock_bh(&mvmsta->lock);
482 /* Unmap MAC queues and TIDs from this queue */
483 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
484 struct iwl_mvm_txq *mvmtxq =
485 iwl_mvm_txq_from_tid(sta, tid);
486
487 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
488 disable_agg_tids |= BIT(tid);
489 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
490
491 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
492 }
493
494 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
495 spin_unlock_bh(&mvmsta->lock);
496
497 rcu_read_unlock();
498
499 /*
500 * The TX path may have been using this TXQ_ID from the tid_data,
501 * so make sure it's no longer running so that we can safely reuse
502 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
503 * above, but nothing guarantees we've stopped using them. Thus,
504 * without this, we could get to iwl_mvm_disable_txq() and remove
505 * the queue while still sending frames to it.
506 */
507 synchronize_net();
508
509 return disable_agg_tids;
510 }
511
512 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
513 struct ieee80211_sta *old_sta,
514 u8 new_sta_id)
515 {
516 struct iwl_mvm_sta *mvmsta;
517 u8 sta_id, tid;
518 unsigned long disable_agg_tids = 0;
519 bool same_sta;
520 int ret;
521
522 lockdep_assert_held(&mvm->mutex);
523
524 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
525 return -EINVAL;
526
527 sta_id = mvm->queue_info[queue].ra_sta_id;
528 tid = mvm->queue_info[queue].txq_tid;
529
530 same_sta = sta_id == new_sta_id;
531
532 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
533 if (WARN_ON(!mvmsta))
534 return -EINVAL;
535
536 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
537 /* Disable the queue */
538 if (disable_agg_tids)
539 iwl_mvm_invalidate_sta_queue(mvm, queue,
540 disable_agg_tids, false);
541
542 ret = iwl_mvm_disable_txq(mvm, old_sta, queue, tid, 0);
543 if (ret) {
544 IWL_ERR(mvm,
545 "Failed to free inactive queue %d (ret=%d)\n",
546 queue, ret);
547
548 return ret;
549 }
550
551 /* If TXQ is allocated to another STA, update removal in FW */
552 if (!same_sta)
553 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
554
555 return 0;
556 }
557
558 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
559 unsigned long tfd_queue_mask, u8 ac)
560 {
561 int queue = 0;
562 u8 ac_to_queue[IEEE80211_NUM_ACS];
563 int i;
564
565 /*
566 * This protects us against grabbing a queue that's being reconfigured
567 * by the inactivity checker.
568 */
569 lockdep_assert_held(&mvm->mutex);
570
571 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
572 return -EINVAL;
573
574 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
575
576 /* See what ACs the existing queues for this STA have */
577 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
578 /* Only DATA queues can be shared */
579 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
580 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
581 continue;
582
583 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
584 }
585
586 /*
587 * The queue to share is chosen only from DATA queues as follows (in
588 * descending priority):
589 * 1. An AC_BE queue
590 * 2. Same AC queue
591 * 3. Highest AC queue that is lower than new AC
592 * 4. Any existing AC (there always is at least 1 DATA queue)
593 */
594
595 /* Priority 1: An AC_BE queue */
596 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
597 queue = ac_to_queue[IEEE80211_AC_BE];
598 /* Priority 2: Same AC queue */
599 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
600 queue = ac_to_queue[ac];
601 /* Priority 3a: If new AC is VO and VI exists - use VI */
602 else if (ac == IEEE80211_AC_VO &&
603 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
604 queue = ac_to_queue[IEEE80211_AC_VI];
605 /* Priority 3b: No BE so only AC less than the new one is BK */
606 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
607 queue = ac_to_queue[IEEE80211_AC_BK];
608 /* Priority 4a: No BE nor BK - use VI if exists */
609 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
610 queue = ac_to_queue[IEEE80211_AC_VI];
611 /* Priority 4b: No BE, BK nor VI - use VO if exists */
612 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
613 queue = ac_to_queue[IEEE80211_AC_VO];
614
615 /* Make sure queue found (or not) is legal */
616 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
617 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
618 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
619 IWL_ERR(mvm, "No DATA queues available to share\n");
620 return -ENOSPC;
621 }
622
623 return queue;
624 }
625
626 /*
627 * If a given queue has a higher AC than the TID stream that is being compared
628 * to, the queue needs to be redirected to the lower AC. This function does that
629 * in such a case, otherwise - if no redirection required - it does nothing,
630 * unless the %force param is true.
631 */
632 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
633 int ac, int ssn, unsigned int wdg_timeout,
634 bool force, struct iwl_mvm_txq *txq)
635 {
636 struct iwl_scd_txq_cfg_cmd cmd = {
637 .scd_queue = queue,
638 .action = SCD_CFG_DISABLE_QUEUE,
639 };
640 bool shared_queue;
641 int ret;
642
643 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
644 return -EINVAL;
645
646 /*
647 * If the AC is lower than current one - FIFO needs to be redirected to
648 * the lowest one of the streams in the queue. Check if this is needed
649 * here.
650 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
651 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
652 * we need to check if the numerical value of X is LARGER than of Y.
653 */
654 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
655 IWL_DEBUG_TX_QUEUES(mvm,
656 "No redirection needed on TXQ #%d\n",
657 queue);
658 return 0;
659 }
660
661 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
662 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
663 cmd.tid = mvm->queue_info[queue].txq_tid;
664 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
665
666 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
667 queue, iwl_mvm_ac_to_tx_fifo[ac]);
668
669 /* Stop the queue and wait for it to empty */
670 txq->stopped = true;
671
672 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
673 if (ret) {
674 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
675 queue);
676 ret = -EIO;
677 goto out;
678 }
679
680 /* Before redirecting the queue we need to de-activate it */
681 iwl_trans_txq_disable(mvm->trans, queue, false);
682 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
683 if (ret)
684 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
685 ret);
686
687 /* Make sure the SCD wrptr is correctly set before reconfiguring */
688 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
689
690 /* Update the TID "owner" of the queue */
691 mvm->queue_info[queue].txq_tid = tid;
692
693 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
694
695 /* Redirect to lower AC */
696 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
697 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
698
699 /* Update AC marking of the queue */
700 mvm->queue_info[queue].mac80211_ac = ac;
701
702 /*
703 * Mark queue as shared in transport if shared
704 * Note this has to be done after queue enablement because enablement
705 * can also set this value, and there is no indication there to shared
706 * queues
707 */
708 if (shared_queue)
709 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
710
711 out:
712 /* Continue using the queue */
713 txq->stopped = false;
714
715 return ret;
716 }
717
718 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
719 u8 minq, u8 maxq)
720 {
721 int i;
722
723 lockdep_assert_held(&mvm->mutex);
724
725 /* This should not be hit with new TX path */
726 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
727 return -ENOSPC;
728
729 /* Start by looking for a free queue */
730 for (i = minq; i <= maxq; i++)
731 if (mvm->queue_info[i].tid_bitmap == 0 &&
732 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
733 return i;
734
735 return -ENOSPC;
736 }
737
738 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
739 u8 sta_id, u8 tid, unsigned int timeout)
740 {
741 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE,
742 mvm->trans->cfg->min_256_ba_txq_size);
743
744 if (tid == IWL_MAX_TID_COUNT) {
745 tid = IWL_MGMT_TID;
746 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
747 mvm->trans->cfg->min_txq_size);
748 }
749 queue = iwl_trans_txq_alloc(mvm->trans,
750 cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE),
751 sta_id, tid, SCD_QUEUE_CFG, size, timeout);
752
753 if (queue < 0) {
754 IWL_DEBUG_TX_QUEUES(mvm,
755 "Failed allocating TXQ for sta %d tid %d, ret: %d\n",
756 sta_id, tid, queue);
757 return queue;
758 }
759
760 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
761 queue, sta_id, tid);
762
763 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d\n", queue);
764
765 return queue;
766 }
767
768 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
769 struct ieee80211_sta *sta, u8 ac,
770 int tid)
771 {
772 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
773 struct iwl_mvm_txq *mvmtxq =
774 iwl_mvm_txq_from_tid(sta, tid);
775 unsigned int wdg_timeout =
776 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
777 int queue = -1;
778
779 lockdep_assert_held(&mvm->mutex);
780
781 IWL_DEBUG_TX_QUEUES(mvm,
782 "Allocating queue for sta %d on tid %d\n",
783 mvmsta->sta_id, tid);
784 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
785 if (queue < 0)
786 return queue;
787
788 mvmtxq->txq_id = queue;
789 mvm->tvqm_info[queue].txq_tid = tid;
790 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;
791
792 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
793
794 spin_lock_bh(&mvmsta->lock);
795 mvmsta->tid_data[tid].txq_id = queue;
796 spin_unlock_bh(&mvmsta->lock);
797
798 return 0;
799 }
800
801 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
802 struct ieee80211_sta *sta,
803 int queue, u8 sta_id, u8 tid)
804 {
805 bool enable_queue = true;
806
807 /* Make sure this TID isn't already enabled */
808 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
809 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
810 queue, tid);
811 return false;
812 }
813
814 /* Update mappings and refcounts */
815 if (mvm->queue_info[queue].tid_bitmap)
816 enable_queue = false;
817
818 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
819 mvm->queue_info[queue].ra_sta_id = sta_id;
820
821 if (enable_queue) {
822 if (tid != IWL_MAX_TID_COUNT)
823 mvm->queue_info[queue].mac80211_ac =
824 tid_to_mac80211_ac[tid];
825 else
826 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
827
828 mvm->queue_info[queue].txq_tid = tid;
829 }
830
831 if (sta) {
832 struct iwl_mvm_txq *mvmtxq =
833 iwl_mvm_txq_from_tid(sta, tid);
834
835 mvmtxq->txq_id = queue;
836 }
837
838 IWL_DEBUG_TX_QUEUES(mvm,
839 "Enabling TXQ #%d tids=0x%x\n",
840 queue, mvm->queue_info[queue].tid_bitmap);
841
842 return enable_queue;
843 }
844
845 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
846 int queue, u16 ssn,
847 const struct iwl_trans_txq_scd_cfg *cfg,
848 unsigned int wdg_timeout)
849 {
850 struct iwl_scd_txq_cfg_cmd cmd = {
851 .scd_queue = queue,
852 .action = SCD_CFG_ENABLE_QUEUE,
853 .window = cfg->frame_limit,
854 .sta_id = cfg->sta_id,
855 .ssn = cpu_to_le16(ssn),
856 .tx_fifo = cfg->fifo,
857 .aggregate = cfg->aggregate,
858 .tid = cfg->tid,
859 };
860 bool inc_ssn;
861
862 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
863 return false;
864
865 /* Send the enabling command if we need to */
866 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
867 return false;
868
869 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
870 NULL, wdg_timeout);
871 if (inc_ssn)
872 le16_add_cpu(&cmd.ssn, 1);
873
874 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
875 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
876
877 return inc_ssn;
878 }
879
880 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
881 {
882 struct iwl_scd_txq_cfg_cmd cmd = {
883 .scd_queue = queue,
884 .action = SCD_CFG_UPDATE_QUEUE_TID,
885 };
886 int tid;
887 unsigned long tid_bitmap;
888 int ret;
889
890 lockdep_assert_held(&mvm->mutex);
891
892 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
893 return;
894
895 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
896
897 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
898 return;
899
900 /* Find any TID for queue */
901 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
902 cmd.tid = tid;
903 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
904
905 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
906 if (ret) {
907 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
908 queue, ret);
909 return;
910 }
911
912 mvm->queue_info[queue].txq_tid = tid;
913 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
914 queue, tid);
915 }
916
917 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
918 {
919 struct ieee80211_sta *sta;
920 struct iwl_mvm_sta *mvmsta;
921 u8 sta_id;
922 int tid = -1;
923 unsigned long tid_bitmap;
924 unsigned int wdg_timeout;
925 int ssn;
926 int ret = true;
927
928 /* queue sharing is disabled on new TX path */
929 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
930 return;
931
932 lockdep_assert_held(&mvm->mutex);
933
934 sta_id = mvm->queue_info[queue].ra_sta_id;
935 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
936
937 /* Find TID for queue, and make sure it is the only one on the queue */
938 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
939 if (tid_bitmap != BIT(tid)) {
940 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
941 queue, tid_bitmap);
942 return;
943 }
944
945 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
946 tid);
947
948 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
949 lockdep_is_held(&mvm->mutex));
950
951 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
952 return;
953
954 mvmsta = iwl_mvm_sta_from_mac80211(sta);
955 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
956
957 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
958
959 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
960 tid_to_mac80211_ac[tid], ssn,
961 wdg_timeout, true,
962 iwl_mvm_txq_from_tid(sta, tid));
963 if (ret) {
964 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
965 return;
966 }
967
968 /* If aggs should be turned back on - do it */
969 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
970 struct iwl_mvm_add_sta_cmd cmd = {0};
971
972 mvmsta->tid_disable_agg &= ~BIT(tid);
973
974 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
975 cmd.sta_id = mvmsta->sta_id;
976 cmd.add_modify = STA_MODE_MODIFY;
977 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
978 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
979 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
980
981 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
982 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
983 if (!ret) {
984 IWL_DEBUG_TX_QUEUES(mvm,
985 "TXQ #%d is now aggregated again\n",
986 queue);
987
988 /* Mark queue intenally as aggregating again */
989 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
990 }
991 }
992
993 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
994 }
995
996 /*
997 * Remove inactive TIDs of a given queue.
998 * If all queue TIDs are inactive - mark the queue as inactive
999 * If only some the queue TIDs are inactive - unmap them from the queue
1000 *
1001 * Returns %true if all TIDs were removed and the queue could be reused.
1002 */
1003 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1004 struct iwl_mvm_sta *mvmsta, int queue,
1005 unsigned long tid_bitmap,
1006 unsigned long *unshare_queues,
1007 unsigned long *changetid_queues)
1008 {
1009 int tid;
1010
1011 lockdep_assert_held(&mvmsta->lock);
1012 lockdep_assert_held(&mvm->mutex);
1013
1014 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1015 return false;
1016
1017 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1018 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1019 /* If some TFDs are still queued - don't mark TID as inactive */
1020 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1021 tid_bitmap &= ~BIT(tid);
1022
1023 /* Don't mark as inactive any TID that has an active BA */
1024 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1025 tid_bitmap &= ~BIT(tid);
1026 }
1027
1028 /* If all TIDs in the queue are inactive - return it can be reused */
1029 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1030 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1031 return true;
1032 }
1033
1034 /*
1035 * If we are here, this is a shared queue and not all TIDs timed-out.
1036 * Remove the ones that did.
1037 */
1038 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1039 u16 tid_bitmap;
1040
1041 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1042 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1043
1044 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1045
1046 /*
1047 * We need to take into account a situation in which a TXQ was
1048 * allocated to TID x, and then turned shared by adding TIDs y
1049 * and z. If TID x becomes inactive and is removed from the TXQ,
1050 * ownership must be given to one of the remaining TIDs.
1051 * This is mainly because if TID x continues - a new queue can't
1052 * be allocated for it as long as it is an owner of another TXQ.
1053 *
1054 * Mark this queue in the right bitmap, we'll send the command
1055 * to the firmware later.
1056 */
1057 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1058 set_bit(queue, changetid_queues);
1059
1060 IWL_DEBUG_TX_QUEUES(mvm,
1061 "Removing inactive TID %d from shared Q:%d\n",
1062 tid, queue);
1063 }
1064
1065 IWL_DEBUG_TX_QUEUES(mvm,
1066 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1067 mvm->queue_info[queue].tid_bitmap);
1068
1069 /*
1070 * There may be different TIDs with the same mac queues, so make
1071 * sure all TIDs have existing corresponding mac queues enabled
1072 */
1073 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1074
1075 /* If the queue is marked as shared - "unshare" it */
1076 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1077 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1078 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1079 queue);
1080 set_bit(queue, unshare_queues);
1081 }
1082
1083 return false;
1084 }
1085
1086 /*
1087 * Check for inactivity - this includes checking if any queue
1088 * can be unshared and finding one (and only one) that can be
1089 * reused.
1090 * This function is also invoked as a sort of clean-up task,
1091 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1092 *
1093 * Returns the queue number, or -ENOSPC.
1094 */
1095 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1096 {
1097 unsigned long now = jiffies;
1098 unsigned long unshare_queues = 0;
1099 unsigned long changetid_queues = 0;
1100 int i, ret, free_queue = -ENOSPC;
1101 struct ieee80211_sta *queue_owner = NULL;
1102
1103 lockdep_assert_held(&mvm->mutex);
1104
1105 if (iwl_mvm_has_new_tx_api(mvm))
1106 return -ENOSPC;
1107
1108 rcu_read_lock();
1109
1110 /* we skip the CMD queue below by starting at 1 */
1111 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1112
1113 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1114 struct ieee80211_sta *sta;
1115 struct iwl_mvm_sta *mvmsta;
1116 u8 sta_id;
1117 int tid;
1118 unsigned long inactive_tid_bitmap = 0;
1119 unsigned long queue_tid_bitmap;
1120
1121 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1122 if (!queue_tid_bitmap)
1123 continue;
1124
1125 /* If TXQ isn't in active use anyway - nothing to do here... */
1126 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1127 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1128 continue;
1129
1130 /* Check to see if there are inactive TIDs on this queue */
1131 for_each_set_bit(tid, &queue_tid_bitmap,
1132 IWL_MAX_TID_COUNT + 1) {
1133 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1134 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1135 continue;
1136
1137 inactive_tid_bitmap |= BIT(tid);
1138 }
1139
1140 /* If all TIDs are active - finish check on this queue */
1141 if (!inactive_tid_bitmap)
1142 continue;
1143
1144 /*
1145 * If we are here - the queue hadn't been served recently and is
1146 * in use
1147 */
1148
1149 sta_id = mvm->queue_info[i].ra_sta_id;
1150 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1151
1152 /*
1153 * If the STA doesn't exist anymore, it isn't an error. It could
1154 * be that it was removed since getting the queues, and in this
1155 * case it should've inactivated its queues anyway.
1156 */
1157 if (IS_ERR_OR_NULL(sta))
1158 continue;
1159
1160 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1161
1162 spin_lock_bh(&mvmsta->lock);
1163 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1164 inactive_tid_bitmap,
1165 &unshare_queues,
1166 &changetid_queues);
1167 if (ret >= 0 && free_queue < 0) {
1168 queue_owner = sta;
1169 free_queue = ret;
1170 }
1171 /* only unlock sta lock - we still need the queue info lock */
1172 spin_unlock_bh(&mvmsta->lock);
1173 }
1174
1175
1176 /* Reconfigure queues requiring reconfiguation */
1177 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1178 iwl_mvm_unshare_queue(mvm, i);
1179 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1180 iwl_mvm_change_queue_tid(mvm, i);
1181
1182 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1183 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1184 alloc_for_sta);
1185 if (ret) {
1186 rcu_read_unlock();
1187 return ret;
1188 }
1189 }
1190
1191 rcu_read_unlock();
1192
1193 return free_queue;
1194 }
1195
1196 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1197 struct ieee80211_sta *sta, u8 ac, int tid)
1198 {
1199 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1200 struct iwl_trans_txq_scd_cfg cfg = {
1201 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1202 .sta_id = mvmsta->sta_id,
1203 .tid = tid,
1204 .frame_limit = IWL_FRAME_LIMIT,
1205 };
1206 unsigned int wdg_timeout =
1207 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1208 int queue = -1;
1209 unsigned long disable_agg_tids = 0;
1210 enum iwl_mvm_agg_state queue_state;
1211 bool shared_queue = false, inc_ssn;
1212 int ssn;
1213 unsigned long tfd_queue_mask;
1214 int ret;
1215
1216 lockdep_assert_held(&mvm->mutex);
1217
1218 if (iwl_mvm_has_new_tx_api(mvm))
1219 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1220
1221 spin_lock_bh(&mvmsta->lock);
1222 tfd_queue_mask = mvmsta->tfd_queue_msk;
1223 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1224 spin_unlock_bh(&mvmsta->lock);
1225
1226 if (tid == IWL_MAX_TID_COUNT) {
1227 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1228 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1229 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1230 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1231 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1232 queue);
1233
1234 /* If no such queue is found, we'll use a DATA queue instead */
1235 }
1236
1237 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1238 (mvm->queue_info[mvmsta->reserved_queue].status ==
1239 IWL_MVM_QUEUE_RESERVED)) {
1240 queue = mvmsta->reserved_queue;
1241 mvm->queue_info[queue].reserved = true;
1242 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1243 }
1244
1245 if (queue < 0)
1246 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1247 IWL_MVM_DQA_MIN_DATA_QUEUE,
1248 IWL_MVM_DQA_MAX_DATA_QUEUE);
1249 if (queue < 0) {
1250 /* try harder - perhaps kill an inactive queue */
1251 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1252 }
1253
1254 /* No free queue - we'll have to share */
1255 if (queue <= 0) {
1256 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1257 if (queue > 0) {
1258 shared_queue = true;
1259 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1260 }
1261 }
1262
1263 /*
1264 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1265 * to make sure no one else takes it.
1266 * This will allow avoiding re-acquiring the lock at the end of the
1267 * configuration. On error we'll mark it back as free.
1268 */
1269 if (queue > 0 && !shared_queue)
1270 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1271
1272 /* This shouldn't happen - out of queues */
1273 if (WARN_ON(queue <= 0)) {
1274 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1275 tid, cfg.sta_id);
1276 return queue;
1277 }
1278
1279 /*
1280 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1281 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1282 * as aggregatable.
1283 * Mark all DATA queues as allowing to be aggregated at some point
1284 */
1285 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1286 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1287
1288 IWL_DEBUG_TX_QUEUES(mvm,
1289 "Allocating %squeue #%d to sta %d on tid %d\n",
1290 shared_queue ? "shared " : "", queue,
1291 mvmsta->sta_id, tid);
1292
1293 if (shared_queue) {
1294 /* Disable any open aggs on this queue */
1295 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1296
1297 if (disable_agg_tids) {
1298 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1299 queue);
1300 iwl_mvm_invalidate_sta_queue(mvm, queue,
1301 disable_agg_tids, false);
1302 }
1303 }
1304
1305 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1306
1307 /*
1308 * Mark queue as shared in transport if shared
1309 * Note this has to be done after queue enablement because enablement
1310 * can also set this value, and there is no indication there to shared
1311 * queues
1312 */
1313 if (shared_queue)
1314 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1315
1316 spin_lock_bh(&mvmsta->lock);
1317 /*
1318 * This looks racy, but it is not. We have only one packet for
1319 * this ra/tid in our Tx path since we stop the Qdisc when we
1320 * need to allocate a new TFD queue.
1321 */
1322 if (inc_ssn) {
1323 mvmsta->tid_data[tid].seq_number += 0x10;
1324 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1325 }
1326 mvmsta->tid_data[tid].txq_id = queue;
1327 mvmsta->tfd_queue_msk |= BIT(queue);
1328 queue_state = mvmsta->tid_data[tid].state;
1329
1330 if (mvmsta->reserved_queue == queue)
1331 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1332 spin_unlock_bh(&mvmsta->lock);
1333
1334 if (!shared_queue) {
1335 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1336 if (ret)
1337 goto out_err;
1338
1339 /* If we need to re-enable aggregations... */
1340 if (queue_state == IWL_AGG_ON) {
1341 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1342 if (ret)
1343 goto out_err;
1344 }
1345 } else {
1346 /* Redirect queue, if needed */
1347 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1348 wdg_timeout, false,
1349 iwl_mvm_txq_from_tid(sta, tid));
1350 if (ret)
1351 goto out_err;
1352 }
1353
1354 return 0;
1355
1356 out_err:
1357 iwl_mvm_disable_txq(mvm, sta, queue, tid, 0);
1358
1359 return ret;
1360 }
1361
1362 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1363 {
1364 if (tid == IWL_MAX_TID_COUNT)
1365 return IEEE80211_AC_VO; /* MGMT */
1366
1367 return tid_to_mac80211_ac[tid];
1368 }
1369
1370 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1371 {
1372 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1373 add_stream_wk);
1374
1375 mutex_lock(&mvm->mutex);
1376
1377 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1378
1379 while (!list_empty(&mvm->add_stream_txqs)) {
1380 struct iwl_mvm_txq *mvmtxq;
1381 struct ieee80211_txq *txq;
1382 u8 tid;
1383
1384 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1385 struct iwl_mvm_txq, list);
1386
1387 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1388 drv_priv);
1389 tid = txq->tid;
1390 if (tid == IEEE80211_NUM_TIDS)
1391 tid = IWL_MAX_TID_COUNT;
1392
1393 iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid);
1394 list_del_init(&mvmtxq->list);
1395 local_bh_disable();
1396 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1397 local_bh_enable();
1398 }
1399
1400 mutex_unlock(&mvm->mutex);
1401 }
1402
1403 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1404 struct ieee80211_sta *sta,
1405 enum nl80211_iftype vif_type)
1406 {
1407 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1408 int queue;
1409
1410 /* queue reserving is disabled on new TX path */
1411 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1412 return 0;
1413
1414 /* run the general cleanup/unsharing of queues */
1415 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1416
1417 /* Make sure we have free resources for this STA */
1418 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1419 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1420 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1421 IWL_MVM_QUEUE_FREE))
1422 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1423 else
1424 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1425 IWL_MVM_DQA_MIN_DATA_QUEUE,
1426 IWL_MVM_DQA_MAX_DATA_QUEUE);
1427 if (queue < 0) {
1428 /* try again - this time kick out a queue if needed */
1429 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1430 if (queue < 0) {
1431 IWL_ERR(mvm, "No available queues for new station\n");
1432 return -ENOSPC;
1433 }
1434 }
1435 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1436
1437 mvmsta->reserved_queue = queue;
1438
1439 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1440 queue, mvmsta->sta_id);
1441
1442 return 0;
1443 }
1444
1445 /*
1446 * In DQA mode, after a HW restart the queues should be allocated as before, in
1447 * order to avoid race conditions when there are shared queues. This function
1448 * does the re-mapping and queue allocation.
1449 *
1450 * Note that re-enabling aggregations isn't done in this function.
1451 */
1452 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1453 struct ieee80211_sta *sta)
1454 {
1455 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1456 unsigned int wdg =
1457 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1458 int i;
1459 struct iwl_trans_txq_scd_cfg cfg = {
1460 .sta_id = mvm_sta->sta_id,
1461 .frame_limit = IWL_FRAME_LIMIT,
1462 };
1463
1464 /* Make sure reserved queue is still marked as such (if allocated) */
1465 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1466 mvm->queue_info[mvm_sta->reserved_queue].status =
1467 IWL_MVM_QUEUE_RESERVED;
1468
1469 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1470 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1471 int txq_id = tid_data->txq_id;
1472 int ac;
1473
1474 if (txq_id == IWL_MVM_INVALID_QUEUE)
1475 continue;
1476
1477 ac = tid_to_mac80211_ac[i];
1478
1479 if (iwl_mvm_has_new_tx_api(mvm)) {
1480 IWL_DEBUG_TX_QUEUES(mvm,
1481 "Re-mapping sta %d tid %d\n",
1482 mvm_sta->sta_id, i);
1483 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
1484 i, wdg);
1485 /*
1486 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1487 * to try again later, we have no other good way of
1488 * failing here
1489 */
1490 if (txq_id < 0)
1491 txq_id = IWL_MVM_INVALID_QUEUE;
1492 tid_data->txq_id = txq_id;
1493
1494 /*
1495 * Since we don't set the seq number after reset, and HW
1496 * sets it now, FW reset will cause the seq num to start
1497 * at 0 again, so driver will need to update it
1498 * internally as well, so it keeps in sync with real val
1499 */
1500 tid_data->seq_number = 0;
1501 } else {
1502 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1503
1504 cfg.tid = i;
1505 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1506 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1507 txq_id ==
1508 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1509
1510 IWL_DEBUG_TX_QUEUES(mvm,
1511 "Re-mapping sta %d tid %d to queue %d\n",
1512 mvm_sta->sta_id, i, txq_id);
1513
1514 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1515 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1516 }
1517 }
1518 }
1519
1520 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1521 struct iwl_mvm_int_sta *sta,
1522 const u8 *addr,
1523 u16 mac_id, u16 color)
1524 {
1525 struct iwl_mvm_add_sta_cmd cmd;
1526 int ret;
1527 u32 status = ADD_STA_SUCCESS;
1528
1529 lockdep_assert_held(&mvm->mutex);
1530
1531 memset(&cmd, 0, sizeof(cmd));
1532 cmd.sta_id = sta->sta_id;
1533 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1534 color));
1535 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1536 cmd.station_type = sta->type;
1537
1538 if (!iwl_mvm_has_new_tx_api(mvm))
1539 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1540 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1541
1542 if (addr)
1543 memcpy(cmd.addr, addr, ETH_ALEN);
1544
1545 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1546 iwl_mvm_add_sta_cmd_size(mvm),
1547 &cmd, &status);
1548 if (ret)
1549 return ret;
1550
1551 switch (status & IWL_ADD_STA_STATUS_MASK) {
1552 case ADD_STA_SUCCESS:
1553 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1554 return 0;
1555 default:
1556 ret = -EIO;
1557 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1558 status);
1559 break;
1560 }
1561 return ret;
1562 }
1563
1564 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1565 struct ieee80211_vif *vif,
1566 struct ieee80211_sta *sta)
1567 {
1568 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1569 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1570 struct iwl_mvm_rxq_dup_data *dup_data;
1571 int i, ret, sta_id;
1572 bool sta_update = false;
1573 unsigned int sta_flags = 0;
1574
1575 lockdep_assert_held(&mvm->mutex);
1576
1577 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1578 sta_id = iwl_mvm_find_free_sta_id(mvm,
1579 ieee80211_vif_type_p2p(vif));
1580 else
1581 sta_id = mvm_sta->sta_id;
1582
1583 if (sta_id == IWL_MVM_INVALID_STA)
1584 return -ENOSPC;
1585
1586 spin_lock_init(&mvm_sta->lock);
1587
1588 /* if this is a HW restart re-alloc existing queues */
1589 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1590 struct iwl_mvm_int_sta tmp_sta = {
1591 .sta_id = sta_id,
1592 .type = mvm_sta->sta_type,
1593 };
1594
1595 /*
1596 * First add an empty station since allocating
1597 * a queue requires a valid station
1598 */
1599 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1600 mvmvif->id, mvmvif->color);
1601 if (ret)
1602 goto err;
1603
1604 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1605 sta_update = true;
1606 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1607 goto update_fw;
1608 }
1609
1610 mvm_sta->sta_id = sta_id;
1611 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1612 mvmvif->color);
1613 mvm_sta->vif = vif;
1614 if (!mvm->trans->trans_cfg->gen2)
1615 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1616 else
1617 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1618 mvm_sta->tx_protection = 0;
1619 mvm_sta->tt_tx_protection = false;
1620 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1621
1622 /* HW restart, don't assume the memory has been zeroed */
1623 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1624 mvm_sta->tfd_queue_msk = 0;
1625
1626 /* for HW restart - reset everything but the sequence number */
1627 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1628 u16 seq = mvm_sta->tid_data[i].seq_number;
1629 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1630 mvm_sta->tid_data[i].seq_number = seq;
1631
1632 /*
1633 * Mark all queues for this STA as unallocated and defer TX
1634 * frames until the queue is allocated
1635 */
1636 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1637 }
1638
1639 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1640 struct iwl_mvm_txq *mvmtxq =
1641 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1642
1643 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1644 INIT_LIST_HEAD(&mvmtxq->list);
1645 atomic_set(&mvmtxq->tx_request, 0);
1646 }
1647
1648 mvm_sta->agg_tids = 0;
1649
1650 if (iwl_mvm_has_new_rx_api(mvm) &&
1651 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1652 int q;
1653
1654 dup_data = kcalloc(mvm->trans->num_rx_queues,
1655 sizeof(*dup_data), GFP_KERNEL);
1656 if (!dup_data)
1657 return -ENOMEM;
1658 /*
1659 * Initialize all the last_seq values to 0xffff which can never
1660 * compare equal to the frame's seq_ctrl in the check in
1661 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1662 * number and fragmented packets don't reach that function.
1663 *
1664 * This thus allows receiving a packet with seqno 0 and the
1665 * retry bit set as the very first packet on a new TID.
1666 */
1667 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1668 memset(dup_data[q].last_seq, 0xff,
1669 sizeof(dup_data[q].last_seq));
1670 mvm_sta->dup_data = dup_data;
1671 }
1672
1673 if (!iwl_mvm_has_new_tx_api(mvm)) {
1674 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1675 ieee80211_vif_type_p2p(vif));
1676 if (ret)
1677 goto err;
1678 }
1679
1680 /*
1681 * if rs is registered with mac80211, then "add station" will be handled
1682 * via the corresponding ops, otherwise need to notify rate scaling here
1683 */
1684 if (iwl_mvm_has_tlc_offload(mvm))
1685 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1686 else
1687 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock);
1688
1689 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1690
1691 update_fw:
1692 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1693 if (ret)
1694 goto err;
1695
1696 if (vif->type == NL80211_IFTYPE_STATION) {
1697 if (!sta->tdls) {
1698 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1699 mvmvif->ap_sta_id = sta_id;
1700 } else {
1701 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1702 }
1703 }
1704
1705 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1706
1707 return 0;
1708
1709 err:
1710 return ret;
1711 }
1712
1713 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1714 bool drain)
1715 {
1716 struct iwl_mvm_add_sta_cmd cmd = {};
1717 int ret;
1718 u32 status;
1719
1720 lockdep_assert_held(&mvm->mutex);
1721
1722 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1723 cmd.sta_id = mvmsta->sta_id;
1724 cmd.add_modify = STA_MODE_MODIFY;
1725 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1726 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1727
1728 status = ADD_STA_SUCCESS;
1729 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1730 iwl_mvm_add_sta_cmd_size(mvm),
1731 &cmd, &status);
1732 if (ret)
1733 return ret;
1734
1735 switch (status & IWL_ADD_STA_STATUS_MASK) {
1736 case ADD_STA_SUCCESS:
1737 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1738 mvmsta->sta_id);
1739 break;
1740 default:
1741 ret = -EIO;
1742 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1743 mvmsta->sta_id);
1744 break;
1745 }
1746
1747 return ret;
1748 }
1749
1750 /*
1751 * Remove a station from the FW table. Before sending the command to remove
1752 * the station validate that the station is indeed known to the driver (sanity
1753 * only).
1754 */
1755 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1756 {
1757 struct ieee80211_sta *sta;
1758 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1759 .sta_id = sta_id,
1760 };
1761 int ret;
1762
1763 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1764 lockdep_is_held(&mvm->mutex));
1765
1766 /* Note: internal stations are marked as error values */
1767 if (!sta) {
1768 IWL_ERR(mvm, "Invalid station id\n");
1769 return -EINVAL;
1770 }
1771
1772 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1773 sizeof(rm_sta_cmd), &rm_sta_cmd);
1774 if (ret) {
1775 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1776 return ret;
1777 }
1778
1779 return 0;
1780 }
1781
1782 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1783 struct ieee80211_vif *vif,
1784 struct ieee80211_sta *sta)
1785 {
1786 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1787 int i;
1788
1789 lockdep_assert_held(&mvm->mutex);
1790
1791 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1792 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1793 continue;
1794
1795 iwl_mvm_disable_txq(mvm, sta, mvm_sta->tid_data[i].txq_id, i,
1796 0);
1797 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1798 }
1799
1800 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1801 struct iwl_mvm_txq *mvmtxq =
1802 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1803
1804 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1805 }
1806 }
1807
1808 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1809 struct iwl_mvm_sta *mvm_sta)
1810 {
1811 int i;
1812
1813 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1814 u16 txq_id;
1815 int ret;
1816
1817 spin_lock_bh(&mvm_sta->lock);
1818 txq_id = mvm_sta->tid_data[i].txq_id;
1819 spin_unlock_bh(&mvm_sta->lock);
1820
1821 if (txq_id == IWL_MVM_INVALID_QUEUE)
1822 continue;
1823
1824 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1825 if (ret)
1826 return ret;
1827 }
1828
1829 return 0;
1830 }
1831
1832 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1833 struct ieee80211_vif *vif,
1834 struct ieee80211_sta *sta)
1835 {
1836 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1837 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1838 u8 sta_id = mvm_sta->sta_id;
1839 int ret;
1840
1841 lockdep_assert_held(&mvm->mutex);
1842
1843 if (iwl_mvm_has_new_rx_api(mvm))
1844 kfree(mvm_sta->dup_data);
1845
1846 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1847 if (ret)
1848 return ret;
1849
1850 /* flush its queues here since we are freeing mvm_sta */
1851 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1852 if (ret)
1853 return ret;
1854 if (iwl_mvm_has_new_tx_api(mvm)) {
1855 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1856 } else {
1857 u32 q_mask = mvm_sta->tfd_queue_msk;
1858
1859 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1860 q_mask);
1861 }
1862 if (ret)
1863 return ret;
1864
1865 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1866
1867 iwl_mvm_disable_sta_queues(mvm, vif, sta);
1868
1869 /* If there is a TXQ still marked as reserved - free it */
1870 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1871 u8 reserved_txq = mvm_sta->reserved_queue;
1872 enum iwl_mvm_queue_status *status;
1873
1874 /*
1875 * If no traffic has gone through the reserved TXQ - it
1876 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1877 * should be manually marked as free again
1878 */
1879 status = &mvm->queue_info[reserved_txq].status;
1880 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1881 (*status != IWL_MVM_QUEUE_FREE),
1882 "sta_id %d reserved txq %d status %d",
1883 sta_id, reserved_txq, *status))
1884 return -EINVAL;
1885
1886 *status = IWL_MVM_QUEUE_FREE;
1887 }
1888
1889 if (vif->type == NL80211_IFTYPE_STATION &&
1890 mvmvif->ap_sta_id == sta_id) {
1891 /* if associated - we can't remove the AP STA now */
1892 if (vif->bss_conf.assoc)
1893 return ret;
1894
1895 /* unassoc - go ahead - remove the AP STA now */
1896 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1897 }
1898
1899 /*
1900 * This shouldn't happen - the TDLS channel switch should be canceled
1901 * before the STA is removed.
1902 */
1903 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1904 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1905 cancel_delayed_work(&mvm->tdls_cs.dwork);
1906 }
1907
1908 /*
1909 * Make sure that the tx response code sees the station as -EBUSY and
1910 * calls the drain worker.
1911 */
1912 spin_lock_bh(&mvm_sta->lock);
1913 spin_unlock_bh(&mvm_sta->lock);
1914
1915 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1916 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1917
1918 return ret;
1919 }
1920
1921 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1922 struct ieee80211_vif *vif,
1923 u8 sta_id)
1924 {
1925 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1926
1927 lockdep_assert_held(&mvm->mutex);
1928
1929 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1930 return ret;
1931 }
1932
1933 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1934 struct iwl_mvm_int_sta *sta,
1935 u32 qmask, enum nl80211_iftype iftype,
1936 enum iwl_sta_type type)
1937 {
1938 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1939 sta->sta_id == IWL_MVM_INVALID_STA) {
1940 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1941 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1942 return -ENOSPC;
1943 }
1944
1945 sta->tfd_queue_msk = qmask;
1946 sta->type = type;
1947
1948 /* put a non-NULL value so iterating over the stations won't stop */
1949 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1950 return 0;
1951 }
1952
1953 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1954 {
1955 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1956 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1957 sta->sta_id = IWL_MVM_INVALID_STA;
1958 }
1959
1960 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
1961 u8 sta_id, u8 fifo)
1962 {
1963 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1964 mvm->trans->trans_cfg->base_params->wd_timeout :
1965 IWL_WATCHDOG_DISABLED;
1966 struct iwl_trans_txq_scd_cfg cfg = {
1967 .fifo = fifo,
1968 .sta_id = sta_id,
1969 .tid = IWL_MAX_TID_COUNT,
1970 .aggregate = false,
1971 .frame_limit = IWL_FRAME_LIMIT,
1972 };
1973
1974 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1975
1976 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
1977 }
1978
1979 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
1980 {
1981 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1982 mvm->trans->trans_cfg->base_params->wd_timeout :
1983 IWL_WATCHDOG_DISABLED;
1984
1985 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1986
1987 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT,
1988 wdg_timeout);
1989 }
1990
1991 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
1992 int maccolor,
1993 struct iwl_mvm_int_sta *sta,
1994 u16 *queue, int fifo)
1995 {
1996 int ret;
1997
1998 /* Map queue to fifo - needs to happen before adding station */
1999 if (!iwl_mvm_has_new_tx_api(mvm))
2000 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2001
2002 ret = iwl_mvm_add_int_sta_common(mvm, sta, NULL, macidx, maccolor);
2003 if (ret) {
2004 if (!iwl_mvm_has_new_tx_api(mvm))
2005 iwl_mvm_disable_txq(mvm, NULL, *queue,
2006 IWL_MAX_TID_COUNT, 0);
2007 return ret;
2008 }
2009
2010 /*
2011 * For 22000 firmware and on we cannot add queue to a station unknown
2012 * to firmware so enable queue here - after the station was added
2013 */
2014 if (iwl_mvm_has_new_tx_api(mvm)) {
2015 int txq;
2016
2017 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2018 if (txq < 0) {
2019 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2020 return txq;
2021 }
2022
2023 *queue = txq;
2024 }
2025
2026 return 0;
2027 }
2028
2029 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
2030 {
2031 int ret;
2032
2033 lockdep_assert_held(&mvm->mutex);
2034
2035 /* Allocate aux station and assign to it the aux queue */
2036 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2037 NL80211_IFTYPE_UNSPECIFIED,
2038 IWL_STA_AUX_ACTIVITY);
2039 if (ret)
2040 return ret;
2041
2042 ret = iwl_mvm_add_int_sta_with_queue(mvm, MAC_INDEX_AUX, 0,
2043 &mvm->aux_sta, &mvm->aux_queue,
2044 IWL_MVM_TX_FIFO_MCAST);
2045 if (ret) {
2046 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2047 return ret;
2048 }
2049
2050 return 0;
2051 }
2052
2053 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2054 {
2055 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2056
2057 lockdep_assert_held(&mvm->mutex);
2058
2059 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2060 &mvm->snif_sta, &mvm->snif_queue,
2061 IWL_MVM_TX_FIFO_BE);
2062 }
2063
2064 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2065 {
2066 int ret;
2067
2068 lockdep_assert_held(&mvm->mutex);
2069
2070 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
2071 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2072 if (ret)
2073 IWL_WARN(mvm, "Failed sending remove station\n");
2074
2075 return ret;
2076 }
2077
2078 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2079 {
2080 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2081 }
2082
2083 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
2084 {
2085 lockdep_assert_held(&mvm->mutex);
2086
2087 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2088 }
2089
2090 /*
2091 * Send the add station command for the vif's broadcast station.
2092 * Assumes that the station was already allocated.
2093 *
2094 * @mvm: the mvm component
2095 * @vif: the interface to which the broadcast station is added
2096 * @bsta: the broadcast station to add.
2097 */
2098 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2099 {
2100 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2101 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2102 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2103 const u8 *baddr = _baddr;
2104 int queue;
2105 int ret;
2106 unsigned int wdg_timeout =
2107 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2108 struct iwl_trans_txq_scd_cfg cfg = {
2109 .fifo = IWL_MVM_TX_FIFO_VO,
2110 .sta_id = mvmvif->bcast_sta.sta_id,
2111 .tid = IWL_MAX_TID_COUNT,
2112 .aggregate = false,
2113 .frame_limit = IWL_FRAME_LIMIT,
2114 };
2115
2116 lockdep_assert_held(&mvm->mutex);
2117
2118 if (!iwl_mvm_has_new_tx_api(mvm)) {
2119 if (vif->type == NL80211_IFTYPE_AP ||
2120 vif->type == NL80211_IFTYPE_ADHOC) {
2121 queue = mvm->probe_queue;
2122 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2123 queue = mvm->p2p_dev_queue;
2124 } else {
2125 WARN(1, "Missing required TXQ for adding bcast STA\n");
2126 return -EINVAL;
2127 }
2128
2129 bsta->tfd_queue_msk |= BIT(queue);
2130
2131 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2132 }
2133
2134 if (vif->type == NL80211_IFTYPE_ADHOC)
2135 baddr = vif->bss_conf.bssid;
2136
2137 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2138 return -ENOSPC;
2139
2140 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2141 mvmvif->id, mvmvif->color);
2142 if (ret)
2143 return ret;
2144
2145 /*
2146 * For 22000 firmware and on we cannot add queue to a station unknown
2147 * to firmware so enable queue here - after the station was added
2148 */
2149 if (iwl_mvm_has_new_tx_api(mvm)) {
2150 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
2151 IWL_MAX_TID_COUNT,
2152 wdg_timeout);
2153 if (queue < 0) {
2154 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2155 return queue;
2156 }
2157
2158 if (vif->type == NL80211_IFTYPE_AP ||
2159 vif->type == NL80211_IFTYPE_ADHOC)
2160 mvm->probe_queue = queue;
2161 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2162 mvm->p2p_dev_queue = queue;
2163 }
2164
2165 return 0;
2166 }
2167
2168 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2169 struct ieee80211_vif *vif)
2170 {
2171 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2172 int queue;
2173
2174 lockdep_assert_held(&mvm->mutex);
2175
2176 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
2177
2178 switch (vif->type) {
2179 case NL80211_IFTYPE_AP:
2180 case NL80211_IFTYPE_ADHOC:
2181 queue = mvm->probe_queue;
2182 break;
2183 case NL80211_IFTYPE_P2P_DEVICE:
2184 queue = mvm->p2p_dev_queue;
2185 break;
2186 default:
2187 WARN(1, "Can't free bcast queue on vif type %d\n",
2188 vif->type);
2189 return;
2190 }
2191
2192 iwl_mvm_disable_txq(mvm, NULL, queue, IWL_MAX_TID_COUNT, 0);
2193 if (iwl_mvm_has_new_tx_api(mvm))
2194 return;
2195
2196 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2197 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2198 }
2199
2200 /* Send the FW a request to remove the station from it's internal data
2201 * structures, but DO NOT remove the entry from the local data structures. */
2202 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2203 {
2204 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2205 int ret;
2206
2207 lockdep_assert_held(&mvm->mutex);
2208
2209 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2210
2211 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2212 if (ret)
2213 IWL_WARN(mvm, "Failed sending remove station\n");
2214 return ret;
2215 }
2216
2217 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2218 {
2219 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2220
2221 lockdep_assert_held(&mvm->mutex);
2222
2223 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2224 ieee80211_vif_type_p2p(vif),
2225 IWL_STA_GENERAL_PURPOSE);
2226 }
2227
2228 /* Allocate a new station entry for the broadcast station to the given vif,
2229 * and send it to the FW.
2230 * Note that each P2P mac should have its own broadcast station.
2231 *
2232 * @mvm: the mvm component
2233 * @vif: the interface to which the broadcast station is added
2234 * @bsta: the broadcast station to add. */
2235 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2236 {
2237 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2238 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2239 int ret;
2240
2241 lockdep_assert_held(&mvm->mutex);
2242
2243 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2244 if (ret)
2245 return ret;
2246
2247 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2248
2249 if (ret)
2250 iwl_mvm_dealloc_int_sta(mvm, bsta);
2251
2252 return ret;
2253 }
2254
2255 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2256 {
2257 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2258
2259 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2260 }
2261
2262 /*
2263 * Send the FW a request to remove the station from it's internal data
2264 * structures, and in addition remove it from the local data structure.
2265 */
2266 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2267 {
2268 int ret;
2269
2270 lockdep_assert_held(&mvm->mutex);
2271
2272 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2273
2274 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2275
2276 return ret;
2277 }
2278
2279 /*
2280 * Allocate a new station entry for the multicast station to the given vif,
2281 * and send it to the FW.
2282 * Note that each AP/GO mac should have its own multicast station.
2283 *
2284 * @mvm: the mvm component
2285 * @vif: the interface to which the multicast station is added
2286 */
2287 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2288 {
2289 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2290 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2291 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2292 const u8 *maddr = _maddr;
2293 struct iwl_trans_txq_scd_cfg cfg = {
2294 .fifo = vif->type == NL80211_IFTYPE_AP ?
2295 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2296 .sta_id = msta->sta_id,
2297 .tid = 0,
2298 .aggregate = false,
2299 .frame_limit = IWL_FRAME_LIMIT,
2300 };
2301 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2302 int ret;
2303
2304 lockdep_assert_held(&mvm->mutex);
2305
2306 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2307 vif->type != NL80211_IFTYPE_ADHOC))
2308 return -ENOTSUPP;
2309
2310 /*
2311 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2312 * invalid, so make sure we use the queue we want.
2313 * Note that this is done here as we want to avoid making DQA
2314 * changes in mac80211 layer.
2315 */
2316 if (vif->type == NL80211_IFTYPE_ADHOC)
2317 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2318
2319 /*
2320 * While in previous FWs we had to exclude cab queue from TFD queue
2321 * mask, now it is needed as any other queue.
2322 */
2323 if (!iwl_mvm_has_new_tx_api(mvm) &&
2324 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2325 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2326 timeout);
2327 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
2328 }
2329 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2330 mvmvif->id, mvmvif->color);
2331 if (ret)
2332 goto err;
2333
2334 /*
2335 * Enable cab queue after the ADD_STA command is sent.
2336 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2337 * command with unknown station id, and for FW that doesn't support
2338 * station API since the cab queue is not included in the
2339 * tfd_queue_mask.
2340 */
2341 if (iwl_mvm_has_new_tx_api(mvm)) {
2342 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
2343 0,
2344 timeout);
2345 if (queue < 0) {
2346 ret = queue;
2347 goto err;
2348 }
2349 mvmvif->cab_queue = queue;
2350 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2351 IWL_UCODE_TLV_API_STA_TYPE))
2352 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2353 timeout);
2354
2355 return 0;
2356 err:
2357 iwl_mvm_dealloc_int_sta(mvm, msta);
2358 return ret;
2359 }
2360
2361 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2362 struct ieee80211_key_conf *keyconf,
2363 bool mcast)
2364 {
2365 union {
2366 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2367 struct iwl_mvm_add_sta_key_cmd cmd;
2368 } u = {};
2369 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2370 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2371 __le16 key_flags;
2372 int ret, size;
2373 u32 status;
2374
2375 /* This is a valid situation for GTK removal */
2376 if (sta_id == IWL_MVM_INVALID_STA)
2377 return 0;
2378
2379 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2380 STA_KEY_FLG_KEYID_MSK);
2381 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2382 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2383
2384 if (mcast)
2385 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2386
2387 /*
2388 * The fields assigned here are in the same location at the start
2389 * of the command, so we can do this union trick.
2390 */
2391 u.cmd.common.key_flags = key_flags;
2392 u.cmd.common.key_offset = keyconf->hw_key_idx;
2393 u.cmd.common.sta_id = sta_id;
2394
2395 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2396
2397 status = ADD_STA_SUCCESS;
2398 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2399 &status);
2400
2401 switch (status) {
2402 case ADD_STA_SUCCESS:
2403 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2404 break;
2405 default:
2406 ret = -EIO;
2407 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2408 break;
2409 }
2410
2411 return ret;
2412 }
2413
2414 /*
2415 * Send the FW a request to remove the station from it's internal data
2416 * structures, and in addition remove it from the local data structure.
2417 */
2418 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2419 {
2420 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2421 int ret;
2422
2423 lockdep_assert_held(&mvm->mutex);
2424
2425 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2426
2427 iwl_mvm_disable_txq(mvm, NULL, mvmvif->cab_queue, 0, 0);
2428
2429 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2430 if (ret)
2431 IWL_WARN(mvm, "Failed sending remove station\n");
2432
2433 return ret;
2434 }
2435
2436 #define IWL_MAX_RX_BA_SESSIONS 16
2437
2438 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2439 {
2440 struct iwl_mvm_rss_sync_notif notif = {
2441 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2442 .metadata.sync = 1,
2443 .delba.baid = baid,
2444 };
2445 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2446 };
2447
2448 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2449 struct iwl_mvm_baid_data *data)
2450 {
2451 int i;
2452
2453 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2454
2455 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2456 int j;
2457 struct iwl_mvm_reorder_buffer *reorder_buf =
2458 &data->reorder_buf[i];
2459 struct iwl_mvm_reorder_buf_entry *entries =
2460 &data->entries[i * data->entries_per_queue];
2461
2462 spin_lock_bh(&reorder_buf->lock);
2463 if (likely(!reorder_buf->num_stored)) {
2464 spin_unlock_bh(&reorder_buf->lock);
2465 continue;
2466 }
2467
2468 /*
2469 * This shouldn't happen in regular DELBA since the internal
2470 * delBA notification should trigger a release of all frames in
2471 * the reorder buffer.
2472 */
2473 WARN_ON(1);
2474
2475 for (j = 0; j < reorder_buf->buf_size; j++)
2476 __skb_queue_purge(&entries[j].e.frames);
2477 /*
2478 * Prevent timer re-arm. This prevents a very far fetched case
2479 * where we timed out on the notification. There may be prior
2480 * RX frames pending in the RX queue before the notification
2481 * that might get processed between now and the actual deletion
2482 * and we would re-arm the timer although we are deleting the
2483 * reorder buffer.
2484 */
2485 reorder_buf->removed = true;
2486 spin_unlock_bh(&reorder_buf->lock);
2487 del_timer_sync(&reorder_buf->reorder_timer);
2488 }
2489 }
2490
2491 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2492 struct iwl_mvm_baid_data *data,
2493 u16 ssn, u16 buf_size)
2494 {
2495 int i;
2496
2497 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2498 struct iwl_mvm_reorder_buffer *reorder_buf =
2499 &data->reorder_buf[i];
2500 struct iwl_mvm_reorder_buf_entry *entries =
2501 &data->entries[i * data->entries_per_queue];
2502 int j;
2503
2504 reorder_buf->num_stored = 0;
2505 reorder_buf->head_sn = ssn;
2506 reorder_buf->buf_size = buf_size;
2507 /* rx reorder timer */
2508 timer_setup(&reorder_buf->reorder_timer,
2509 iwl_mvm_reorder_timer_expired, 0);
2510 spin_lock_init(&reorder_buf->lock);
2511 reorder_buf->mvm = mvm;
2512 reorder_buf->queue = i;
2513 reorder_buf->valid = false;
2514 for (j = 0; j < reorder_buf->buf_size; j++)
2515 __skb_queue_head_init(&entries[j].e.frames);
2516 }
2517 }
2518
2519 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2520 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2521 {
2522 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2523 struct iwl_mvm_add_sta_cmd cmd = {};
2524 struct iwl_mvm_baid_data *baid_data = NULL;
2525 int ret;
2526 u32 status;
2527
2528 lockdep_assert_held(&mvm->mutex);
2529
2530 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2531 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2532 return -ENOSPC;
2533 }
2534
2535 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2536 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2537
2538 /* sparse doesn't like the __align() so don't check */
2539 #ifndef __CHECKER__
2540 /*
2541 * The division below will be OK if either the cache line size
2542 * can be divided by the entry size (ALIGN will round up) or if
2543 * if the entry size can be divided by the cache line size, in
2544 * which case the ALIGN() will do nothing.
2545 */
2546 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2547 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2548 #endif
2549
2550 /*
2551 * Upward align the reorder buffer size to fill an entire cache
2552 * line for each queue, to avoid sharing cache lines between
2553 * different queues.
2554 */
2555 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2556
2557 /*
2558 * Allocate here so if allocation fails we can bail out early
2559 * before starting the BA session in the firmware
2560 */
2561 baid_data = kzalloc(sizeof(*baid_data) +
2562 mvm->trans->num_rx_queues *
2563 reorder_buf_size,
2564 GFP_KERNEL);
2565 if (!baid_data)
2566 return -ENOMEM;
2567
2568 /*
2569 * This division is why we need the above BUILD_BUG_ON(),
2570 * if that doesn't hold then this will not be right.
2571 */
2572 baid_data->entries_per_queue =
2573 reorder_buf_size / sizeof(baid_data->entries[0]);
2574 }
2575
2576 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2577 cmd.sta_id = mvm_sta->sta_id;
2578 cmd.add_modify = STA_MODE_MODIFY;
2579 if (start) {
2580 cmd.add_immediate_ba_tid = (u8) tid;
2581 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2582 cmd.rx_ba_window = cpu_to_le16(buf_size);
2583 } else {
2584 cmd.remove_immediate_ba_tid = (u8) tid;
2585 }
2586 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2587 STA_MODIFY_REMOVE_BA_TID;
2588
2589 status = ADD_STA_SUCCESS;
2590 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2591 iwl_mvm_add_sta_cmd_size(mvm),
2592 &cmd, &status);
2593 if (ret)
2594 goto out_free;
2595
2596 switch (status & IWL_ADD_STA_STATUS_MASK) {
2597 case ADD_STA_SUCCESS:
2598 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2599 start ? "start" : "stopp");
2600 break;
2601 case ADD_STA_IMMEDIATE_BA_FAILURE:
2602 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2603 ret = -ENOSPC;
2604 break;
2605 default:
2606 ret = -EIO;
2607 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2608 start ? "start" : "stopp", status);
2609 break;
2610 }
2611
2612 if (ret)
2613 goto out_free;
2614
2615 if (start) {
2616 u8 baid;
2617
2618 mvm->rx_ba_sessions++;
2619
2620 if (!iwl_mvm_has_new_rx_api(mvm))
2621 return 0;
2622
2623 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2624 ret = -EINVAL;
2625 goto out_free;
2626 }
2627 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2628 IWL_ADD_STA_BAID_SHIFT);
2629 baid_data->baid = baid;
2630 baid_data->timeout = timeout;
2631 baid_data->last_rx = jiffies;
2632 baid_data->rcu_ptr = &mvm->baid_map[baid];
2633 timer_setup(&baid_data->session_timer,
2634 iwl_mvm_rx_agg_session_expired, 0);
2635 baid_data->mvm = mvm;
2636 baid_data->tid = tid;
2637 baid_data->sta_id = mvm_sta->sta_id;
2638
2639 mvm_sta->tid_to_baid[tid] = baid;
2640 if (timeout)
2641 mod_timer(&baid_data->session_timer,
2642 TU_TO_EXP_TIME(timeout * 2));
2643
2644 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2645 /*
2646 * protect the BA data with RCU to cover a case where our
2647 * internal RX sync mechanism will timeout (not that it's
2648 * supposed to happen) and we will free the session data while
2649 * RX is being processed in parallel
2650 */
2651 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2652 mvm_sta->sta_id, tid, baid);
2653 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2654 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2655 } else {
2656 u8 baid = mvm_sta->tid_to_baid[tid];
2657
2658 if (mvm->rx_ba_sessions > 0)
2659 /* check that restart flow didn't zero the counter */
2660 mvm->rx_ba_sessions--;
2661 if (!iwl_mvm_has_new_rx_api(mvm))
2662 return 0;
2663
2664 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2665 return -EINVAL;
2666
2667 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2668 if (WARN_ON(!baid_data))
2669 return -EINVAL;
2670
2671 /* synchronize all rx queues so we can safely delete */
2672 iwl_mvm_free_reorder(mvm, baid_data);
2673 del_timer_sync(&baid_data->session_timer);
2674 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2675 kfree_rcu(baid_data, rcu_head);
2676 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2677 }
2678 return 0;
2679
2680 out_free:
2681 kfree(baid_data);
2682 return ret;
2683 }
2684
2685 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2686 int tid, u8 queue, bool start)
2687 {
2688 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2689 struct iwl_mvm_add_sta_cmd cmd = {};
2690 int ret;
2691 u32 status;
2692
2693 lockdep_assert_held(&mvm->mutex);
2694
2695 if (start) {
2696 mvm_sta->tfd_queue_msk |= BIT(queue);
2697 mvm_sta->tid_disable_agg &= ~BIT(tid);
2698 } else {
2699 /* In DQA-mode the queue isn't removed on agg termination */
2700 mvm_sta->tid_disable_agg |= BIT(tid);
2701 }
2702
2703 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2704 cmd.sta_id = mvm_sta->sta_id;
2705 cmd.add_modify = STA_MODE_MODIFY;
2706 if (!iwl_mvm_has_new_tx_api(mvm))
2707 cmd.modify_mask = STA_MODIFY_QUEUES;
2708 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2709 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2710 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2711
2712 status = ADD_STA_SUCCESS;
2713 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2714 iwl_mvm_add_sta_cmd_size(mvm),
2715 &cmd, &status);
2716 if (ret)
2717 return ret;
2718
2719 switch (status & IWL_ADD_STA_STATUS_MASK) {
2720 case ADD_STA_SUCCESS:
2721 break;
2722 default:
2723 ret = -EIO;
2724 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2725 start ? "start" : "stopp", status);
2726 break;
2727 }
2728
2729 return ret;
2730 }
2731
2732 const u8 tid_to_mac80211_ac[] = {
2733 IEEE80211_AC_BE,
2734 IEEE80211_AC_BK,
2735 IEEE80211_AC_BK,
2736 IEEE80211_AC_BE,
2737 IEEE80211_AC_VI,
2738 IEEE80211_AC_VI,
2739 IEEE80211_AC_VO,
2740 IEEE80211_AC_VO,
2741 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2742 };
2743
2744 static const u8 tid_to_ucode_ac[] = {
2745 AC_BE,
2746 AC_BK,
2747 AC_BK,
2748 AC_BE,
2749 AC_VI,
2750 AC_VI,
2751 AC_VO,
2752 AC_VO,
2753 };
2754
2755 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2756 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2757 {
2758 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2759 struct iwl_mvm_tid_data *tid_data;
2760 u16 normalized_ssn;
2761 u16 txq_id;
2762 int ret;
2763
2764 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2765 return -EINVAL;
2766
2767 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2768 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2769 IWL_ERR(mvm,
2770 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2771 mvmsta->tid_data[tid].state);
2772 return -ENXIO;
2773 }
2774
2775 lockdep_assert_held(&mvm->mutex);
2776
2777 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2778 iwl_mvm_has_new_tx_api(mvm)) {
2779 u8 ac = tid_to_mac80211_ac[tid];
2780
2781 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2782 if (ret)
2783 return ret;
2784 }
2785
2786 spin_lock_bh(&mvmsta->lock);
2787
2788 /*
2789 * Note the possible cases:
2790 * 1. An enabled TXQ - TXQ needs to become agg'ed
2791 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2792 * it as reserved
2793 */
2794 txq_id = mvmsta->tid_data[tid].txq_id;
2795 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2796 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2797 IWL_MVM_DQA_MIN_DATA_QUEUE,
2798 IWL_MVM_DQA_MAX_DATA_QUEUE);
2799 if (ret < 0) {
2800 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2801 goto out;
2802 }
2803
2804 txq_id = ret;
2805
2806 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2807 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2808 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2809 ret = -ENXIO;
2810 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2811 tid, IWL_MAX_HW_QUEUES - 1);
2812 goto out;
2813
2814 } else if (unlikely(mvm->queue_info[txq_id].status ==
2815 IWL_MVM_QUEUE_SHARED)) {
2816 ret = -ENXIO;
2817 IWL_DEBUG_TX_QUEUES(mvm,
2818 "Can't start tid %d agg on shared queue!\n",
2819 tid);
2820 goto out;
2821 }
2822
2823 IWL_DEBUG_TX_QUEUES(mvm,
2824 "AGG for tid %d will be on queue #%d\n",
2825 tid, txq_id);
2826
2827 tid_data = &mvmsta->tid_data[tid];
2828 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2829 tid_data->txq_id = txq_id;
2830 *ssn = tid_data->ssn;
2831
2832 IWL_DEBUG_TX_QUEUES(mvm,
2833 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2834 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2835 tid_data->next_reclaimed);
2836
2837 /*
2838 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2839 * to align the wrap around of ssn so we compare relevant values.
2840 */
2841 normalized_ssn = tid_data->ssn;
2842 if (mvm->trans->trans_cfg->gen2)
2843 normalized_ssn &= 0xff;
2844
2845 if (normalized_ssn == tid_data->next_reclaimed) {
2846 tid_data->state = IWL_AGG_STARTING;
2847 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2848 } else {
2849 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2850 ret = 0;
2851 }
2852
2853 out:
2854 spin_unlock_bh(&mvmsta->lock);
2855
2856 return ret;
2857 }
2858
2859 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2860 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2861 bool amsdu)
2862 {
2863 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2864 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2865 unsigned int wdg_timeout =
2866 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2867 int queue, ret;
2868 bool alloc_queue = true;
2869 enum iwl_mvm_queue_status queue_status;
2870 u16 ssn;
2871
2872 struct iwl_trans_txq_scd_cfg cfg = {
2873 .sta_id = mvmsta->sta_id,
2874 .tid = tid,
2875 .frame_limit = buf_size,
2876 .aggregate = true,
2877 };
2878
2879 /*
2880 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2881 * manager, so this function should never be called in this case.
2882 */
2883 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2884 return -EINVAL;
2885
2886 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2887 != IWL_MAX_TID_COUNT);
2888
2889 spin_lock_bh(&mvmsta->lock);
2890 ssn = tid_data->ssn;
2891 queue = tid_data->txq_id;
2892 tid_data->state = IWL_AGG_ON;
2893 mvmsta->agg_tids |= BIT(tid);
2894 tid_data->ssn = 0xffff;
2895 tid_data->amsdu_in_ampdu_allowed = amsdu;
2896 spin_unlock_bh(&mvmsta->lock);
2897
2898 if (iwl_mvm_has_new_tx_api(mvm)) {
2899 /*
2900 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2901 * would have failed, so if we are here there is no need to
2902 * allocate a queue.
2903 * However, if aggregation size is different than the default
2904 * size, the scheduler should be reconfigured.
2905 * We cannot do this with the new TX API, so return unsupported
2906 * for now, until it will be offloaded to firmware..
2907 * Note that if SCD default value changes - this condition
2908 * should be updated as well.
2909 */
2910 if (buf_size < IWL_FRAME_LIMIT)
2911 return -ENOTSUPP;
2912
2913 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2914 if (ret)
2915 return -EIO;
2916 goto out;
2917 }
2918
2919 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2920
2921 queue_status = mvm->queue_info[queue].status;
2922
2923 /* Maybe there is no need to even alloc a queue... */
2924 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2925 alloc_queue = false;
2926
2927 /*
2928 * Only reconfig the SCD for the queue if the window size has
2929 * changed from current (become smaller)
2930 */
2931 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2932 /*
2933 * If reconfiguring an existing queue, it first must be
2934 * drained
2935 */
2936 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2937 BIT(queue));
2938 if (ret) {
2939 IWL_ERR(mvm,
2940 "Error draining queue before reconfig\n");
2941 return ret;
2942 }
2943
2944 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2945 mvmsta->sta_id, tid,
2946 buf_size, ssn);
2947 if (ret) {
2948 IWL_ERR(mvm,
2949 "Error reconfiguring TXQ #%d\n", queue);
2950 return ret;
2951 }
2952 }
2953
2954 if (alloc_queue)
2955 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
2956 &cfg, wdg_timeout);
2957
2958 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2959 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2960 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2961 if (ret)
2962 return -EIO;
2963 }
2964
2965 /* No need to mark as reserved */
2966 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2967
2968 out:
2969 /*
2970 * Even though in theory the peer could have different
2971 * aggregation reorder buffer sizes for different sessions,
2972 * our ucode doesn't allow for that and has a global limit
2973 * for each station. Therefore, use the minimum of all the
2974 * aggregation sessions and our default value.
2975 */
2976 mvmsta->max_agg_bufsize =
2977 min(mvmsta->max_agg_bufsize, buf_size);
2978 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2979
2980 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2981 sta->addr, tid);
2982
2983 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq);
2984 }
2985
2986 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2987 struct iwl_mvm_sta *mvmsta,
2988 struct iwl_mvm_tid_data *tid_data)
2989 {
2990 u16 txq_id = tid_data->txq_id;
2991
2992 lockdep_assert_held(&mvm->mutex);
2993
2994 if (iwl_mvm_has_new_tx_api(mvm))
2995 return;
2996
2997 /*
2998 * The TXQ is marked as reserved only if no traffic came through yet
2999 * This means no traffic has been sent on this TID (agg'd or not), so
3000 * we no longer have use for the queue. Since it hasn't even been
3001 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3002 * free.
3003 */
3004 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3005 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3006 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3007 }
3008 }
3009
3010 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3011 struct ieee80211_sta *sta, u16 tid)
3012 {
3013 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3014 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3015 u16 txq_id;
3016 int err;
3017
3018 /*
3019 * If mac80211 is cleaning its state, then say that we finished since
3020 * our state has been cleared anyway.
3021 */
3022 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3023 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3024 return 0;
3025 }
3026
3027 spin_lock_bh(&mvmsta->lock);
3028
3029 txq_id = tid_data->txq_id;
3030
3031 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3032 mvmsta->sta_id, tid, txq_id, tid_data->state);
3033
3034 mvmsta->agg_tids &= ~BIT(tid);
3035
3036 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3037
3038 switch (tid_data->state) {
3039 case IWL_AGG_ON:
3040 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3041
3042 IWL_DEBUG_TX_QUEUES(mvm,
3043 "ssn = %d, next_recl = %d\n",
3044 tid_data->ssn, tid_data->next_reclaimed);
3045
3046 tid_data->ssn = 0xffff;
3047 tid_data->state = IWL_AGG_OFF;
3048 spin_unlock_bh(&mvmsta->lock);
3049
3050 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3051
3052 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3053 return 0;
3054 case IWL_AGG_STARTING:
3055 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3056 /*
3057 * The agg session has been stopped before it was set up. This
3058 * can happen when the AddBA timer times out for example.
3059 */
3060
3061 /* No barriers since we are under mutex */
3062 lockdep_assert_held(&mvm->mutex);
3063
3064 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3065 tid_data->state = IWL_AGG_OFF;
3066 err = 0;
3067 break;
3068 default:
3069 IWL_ERR(mvm,
3070 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3071 mvmsta->sta_id, tid, tid_data->state);
3072 IWL_ERR(mvm,
3073 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3074 err = -EINVAL;
3075 }
3076
3077 spin_unlock_bh(&mvmsta->lock);
3078
3079 return err;
3080 }
3081
3082 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3083 struct ieee80211_sta *sta, u16 tid)
3084 {
3085 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3086 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3087 u16 txq_id;
3088 enum iwl_mvm_agg_state old_state;
3089
3090 /*
3091 * First set the agg state to OFF to avoid calling
3092 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3093 */
3094 spin_lock_bh(&mvmsta->lock);
3095 txq_id = tid_data->txq_id;
3096 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3097 mvmsta->sta_id, tid, txq_id, tid_data->state);
3098 old_state = tid_data->state;
3099 tid_data->state = IWL_AGG_OFF;
3100 mvmsta->agg_tids &= ~BIT(tid);
3101 spin_unlock_bh(&mvmsta->lock);
3102
3103 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3104
3105 if (old_state >= IWL_AGG_ON) {
3106 iwl_mvm_drain_sta(mvm, mvmsta, true);
3107
3108 if (iwl_mvm_has_new_tx_api(mvm)) {
3109 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3110 BIT(tid), 0))
3111 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3112 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3113 } else {
3114 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
3115 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3116 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3117 }
3118
3119 iwl_mvm_drain_sta(mvm, mvmsta, false);
3120
3121 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3122 }
3123
3124 return 0;
3125 }
3126
3127 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3128 {
3129 int i, max = -1, max_offs = -1;
3130
3131 lockdep_assert_held(&mvm->mutex);
3132
3133 /* Pick the unused key offset with the highest 'deleted'
3134 * counter. Every time a key is deleted, all the counters
3135 * are incremented and the one that was just deleted is
3136 * reset to zero. Thus, the highest counter is the one
3137 * that was deleted longest ago. Pick that one.
3138 */
3139 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3140 if (test_bit(i, mvm->fw_key_table))
3141 continue;
3142 if (mvm->fw_key_deleted[i] > max) {
3143 max = mvm->fw_key_deleted[i];
3144 max_offs = i;
3145 }
3146 }
3147
3148 if (max_offs < 0)
3149 return STA_KEY_IDX_INVALID;
3150
3151 return max_offs;
3152 }
3153
3154 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3155 struct ieee80211_vif *vif,
3156 struct ieee80211_sta *sta)
3157 {
3158 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3159
3160 if (sta)
3161 return iwl_mvm_sta_from_mac80211(sta);
3162
3163 /*
3164 * The device expects GTKs for station interfaces to be
3165 * installed as GTKs for the AP station. If we have no
3166 * station ID, then use AP's station ID.
3167 */
3168 if (vif->type == NL80211_IFTYPE_STATION &&
3169 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3170 u8 sta_id = mvmvif->ap_sta_id;
3171
3172 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3173 lockdep_is_held(&mvm->mutex));
3174
3175 /*
3176 * It is possible that the 'sta' parameter is NULL,
3177 * for example when a GTK is removed - the sta_id will then
3178 * be the AP ID, and no station was passed by mac80211.
3179 */
3180 if (IS_ERR_OR_NULL(sta))
3181 return NULL;
3182
3183 return iwl_mvm_sta_from_mac80211(sta);
3184 }
3185
3186 return NULL;
3187 }
3188
3189 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3190 u32 sta_id,
3191 struct ieee80211_key_conf *key, bool mcast,
3192 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3193 u8 key_offset, bool mfp)
3194 {
3195 union {
3196 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3197 struct iwl_mvm_add_sta_key_cmd cmd;
3198 } u = {};
3199 __le16 key_flags;
3200 int ret;
3201 u32 status;
3202 u16 keyidx;
3203 u64 pn = 0;
3204 int i, size;
3205 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3206 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3207
3208 if (sta_id == IWL_MVM_INVALID_STA)
3209 return -EINVAL;
3210
3211 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3212 STA_KEY_FLG_KEYID_MSK;
3213 key_flags = cpu_to_le16(keyidx);
3214 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3215
3216 switch (key->cipher) {
3217 case WLAN_CIPHER_SUITE_TKIP:
3218 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3219 if (new_api) {
3220 memcpy((void *)&u.cmd.tx_mic_key,
3221 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3222 IWL_MIC_KEY_SIZE);
3223
3224 memcpy((void *)&u.cmd.rx_mic_key,
3225 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3226 IWL_MIC_KEY_SIZE);
3227 pn = atomic64_read(&key->tx_pn);
3228
3229 } else {
3230 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3231 for (i = 0; i < 5; i++)
3232 u.cmd_v1.tkip_rx_ttak[i] =
3233 cpu_to_le16(tkip_p1k[i]);
3234 }
3235 memcpy(u.cmd.common.key, key->key, key->keylen);
3236 break;
3237 case WLAN_CIPHER_SUITE_CCMP:
3238 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3239 memcpy(u.cmd.common.key, key->key, key->keylen);
3240 if (new_api)
3241 pn = atomic64_read(&key->tx_pn);
3242 break;
3243 case WLAN_CIPHER_SUITE_WEP104:
3244 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3245 /* fall through */
3246 case WLAN_CIPHER_SUITE_WEP40:
3247 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3248 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3249 break;
3250 case WLAN_CIPHER_SUITE_GCMP_256:
3251 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3252 /* fall through */
3253 case WLAN_CIPHER_SUITE_GCMP:
3254 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3255 memcpy(u.cmd.common.key, key->key, key->keylen);
3256 if (new_api)
3257 pn = atomic64_read(&key->tx_pn);
3258 break;
3259 default:
3260 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3261 memcpy(u.cmd.common.key, key->key, key->keylen);
3262 }
3263
3264 if (mcast)
3265 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3266 if (mfp)
3267 key_flags |= cpu_to_le16(STA_KEY_MFP);
3268
3269 u.cmd.common.key_offset = key_offset;
3270 u.cmd.common.key_flags = key_flags;
3271 u.cmd.common.sta_id = sta_id;
3272
3273 if (new_api) {
3274 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3275 size = sizeof(u.cmd);
3276 } else {
3277 size = sizeof(u.cmd_v1);
3278 }
3279
3280 status = ADD_STA_SUCCESS;
3281 if (cmd_flags & CMD_ASYNC)
3282 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3283 &u.cmd);
3284 else
3285 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3286 &u.cmd, &status);
3287
3288 switch (status) {
3289 case ADD_STA_SUCCESS:
3290 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3291 break;
3292 default:
3293 ret = -EIO;
3294 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3295 break;
3296 }
3297
3298 return ret;
3299 }
3300
3301 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3302 struct ieee80211_key_conf *keyconf,
3303 u8 sta_id, bool remove_key)
3304 {
3305 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3306
3307 /* verify the key details match the required command's expectations */
3308 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3309 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3310 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3311 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3312 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3313 return -EINVAL;
3314
3315 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3316 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3317 return -EINVAL;
3318
3319 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3320 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3321
3322 if (remove_key) {
3323 /* This is a valid situation for IGTK */
3324 if (sta_id == IWL_MVM_INVALID_STA)
3325 return 0;
3326
3327 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3328 } else {
3329 struct ieee80211_key_seq seq;
3330 const u8 *pn;
3331
3332 switch (keyconf->cipher) {
3333 case WLAN_CIPHER_SUITE_AES_CMAC:
3334 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3335 break;
3336 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3337 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3338 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3339 break;
3340 default:
3341 return -EINVAL;
3342 }
3343
3344 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3345 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3346 igtk_cmd.ctrl_flags |=
3347 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3348 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3349 pn = seq.aes_cmac.pn;
3350 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3351 ((u64) pn[4] << 8) |
3352 ((u64) pn[3] << 16) |
3353 ((u64) pn[2] << 24) |
3354 ((u64) pn[1] << 32) |
3355 ((u64) pn[0] << 40));
3356 }
3357
3358 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3359 remove_key ? "removing" : "installing",
3360 igtk_cmd.sta_id);
3361
3362 if (!iwl_mvm_has_new_rx_api(mvm)) {
3363 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3364 .ctrl_flags = igtk_cmd.ctrl_flags,
3365 .key_id = igtk_cmd.key_id,
3366 .sta_id = igtk_cmd.sta_id,
3367 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3368 };
3369
3370 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3371 ARRAY_SIZE(igtk_cmd_v1.igtk));
3372 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3373 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3374 }
3375 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3376 sizeof(igtk_cmd), &igtk_cmd);
3377 }
3378
3379
3380 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3381 struct ieee80211_vif *vif,
3382 struct ieee80211_sta *sta)
3383 {
3384 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3385
3386 if (sta)
3387 return sta->addr;
3388
3389 if (vif->type == NL80211_IFTYPE_STATION &&
3390 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3391 u8 sta_id = mvmvif->ap_sta_id;
3392 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3393 lockdep_is_held(&mvm->mutex));
3394 return sta->addr;
3395 }
3396
3397
3398 return NULL;
3399 }
3400
3401 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3402 struct ieee80211_vif *vif,
3403 struct ieee80211_sta *sta,
3404 struct ieee80211_key_conf *keyconf,
3405 u8 key_offset,
3406 bool mcast)
3407 {
3408 int ret;
3409 const u8 *addr;
3410 struct ieee80211_key_seq seq;
3411 u16 p1k[5];
3412 u32 sta_id;
3413 bool mfp = false;
3414
3415 if (sta) {
3416 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3417
3418 sta_id = mvm_sta->sta_id;
3419 mfp = sta->mfp;
3420 } else if (vif->type == NL80211_IFTYPE_AP &&
3421 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3422 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3423
3424 sta_id = mvmvif->mcast_sta.sta_id;
3425 } else {
3426 IWL_ERR(mvm, "Failed to find station id\n");
3427 return -EINVAL;
3428 }
3429
3430 switch (keyconf->cipher) {
3431 case WLAN_CIPHER_SUITE_TKIP:
3432 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3433 /* get phase 1 key from mac80211 */
3434 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3435 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3436 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3437 seq.tkip.iv32, p1k, 0, key_offset,
3438 mfp);
3439 break;
3440 case WLAN_CIPHER_SUITE_CCMP:
3441 case WLAN_CIPHER_SUITE_WEP40:
3442 case WLAN_CIPHER_SUITE_WEP104:
3443 case WLAN_CIPHER_SUITE_GCMP:
3444 case WLAN_CIPHER_SUITE_GCMP_256:
3445 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3446 0, NULL, 0, key_offset, mfp);
3447 break;
3448 default:
3449 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3450 0, NULL, 0, key_offset, mfp);
3451 }
3452
3453 return ret;
3454 }
3455
3456 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3457 struct ieee80211_vif *vif,
3458 struct ieee80211_sta *sta,
3459 struct ieee80211_key_conf *keyconf,
3460 u8 key_offset)
3461 {
3462 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3463 struct iwl_mvm_sta *mvm_sta;
3464 u8 sta_id = IWL_MVM_INVALID_STA;
3465 int ret;
3466 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3467
3468 lockdep_assert_held(&mvm->mutex);
3469
3470 if (vif->type != NL80211_IFTYPE_AP ||
3471 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3472 /* Get the station id from the mvm local station table */
3473 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3474 if (!mvm_sta) {
3475 IWL_ERR(mvm, "Failed to find station\n");
3476 return -EINVAL;
3477 }
3478 sta_id = mvm_sta->sta_id;
3479
3480 /*
3481 * It is possible that the 'sta' parameter is NULL, and thus
3482 * there is a need to retrieve the sta from the local station
3483 * table.
3484 */
3485 if (!sta) {
3486 sta = rcu_dereference_protected(
3487 mvm->fw_id_to_mac_id[sta_id],
3488 lockdep_is_held(&mvm->mutex));
3489 if (IS_ERR_OR_NULL(sta)) {
3490 IWL_ERR(mvm, "Invalid station id\n");
3491 return -EINVAL;
3492 }
3493 }
3494
3495 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3496 return -EINVAL;
3497 } else {
3498 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3499
3500 sta_id = mvmvif->mcast_sta.sta_id;
3501 }
3502
3503 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3504 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3505 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3506 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3507 goto end;
3508 }
3509
3510 /* If the key_offset is not pre-assigned, we need to find a
3511 * new offset to use. In normal cases, the offset is not
3512 * pre-assigned, but during HW_RESTART we want to reuse the
3513 * same indices, so we pass them when this function is called.
3514 *
3515 * In D3 entry, we need to hardcoded the indices (because the
3516 * firmware hardcodes the PTK offset to 0). In this case, we
3517 * need to make sure we don't overwrite the hw_key_idx in the
3518 * keyconf structure, because otherwise we cannot configure
3519 * the original ones back when resuming.
3520 */
3521 if (key_offset == STA_KEY_IDX_INVALID) {
3522 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3523 if (key_offset == STA_KEY_IDX_INVALID)
3524 return -ENOSPC;
3525 keyconf->hw_key_idx = key_offset;
3526 }
3527
3528 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3529 if (ret)
3530 goto end;
3531
3532 /*
3533 * For WEP, the same key is used for multicast and unicast. Upload it
3534 * again, using the same key offset, and now pointing the other one
3535 * to the same key slot (offset).
3536 * If this fails, remove the original as well.
3537 */
3538 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3539 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3540 sta) {
3541 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3542 key_offset, !mcast);
3543 if (ret) {
3544 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3545 goto end;
3546 }
3547 }
3548
3549 __set_bit(key_offset, mvm->fw_key_table);
3550
3551 end:
3552 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3553 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3554 sta ? sta->addr : zero_addr, ret);
3555 return ret;
3556 }
3557
3558 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3559 struct ieee80211_vif *vif,
3560 struct ieee80211_sta *sta,
3561 struct ieee80211_key_conf *keyconf)
3562 {
3563 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3564 struct iwl_mvm_sta *mvm_sta;
3565 u8 sta_id = IWL_MVM_INVALID_STA;
3566 int ret, i;
3567
3568 lockdep_assert_held(&mvm->mutex);
3569
3570 /* Get the station from the mvm local station table */
3571 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3572 if (mvm_sta)
3573 sta_id = mvm_sta->sta_id;
3574 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3575 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3576
3577
3578 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3579 keyconf->keyidx, sta_id);
3580
3581 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3582 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3583 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3584 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3585
3586 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3587 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3588 keyconf->hw_key_idx);
3589 return -ENOENT;
3590 }
3591
3592 /* track which key was deleted last */
3593 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3594 if (mvm->fw_key_deleted[i] < U8_MAX)
3595 mvm->fw_key_deleted[i]++;
3596 }
3597 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3598
3599 if (sta && !mvm_sta) {
3600 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3601 return 0;
3602 }
3603
3604 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3605 if (ret)
3606 return ret;
3607
3608 /* delete WEP key twice to get rid of (now useless) offset */
3609 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3610 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3611 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3612
3613 return ret;
3614 }
3615
3616 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3617 struct ieee80211_vif *vif,
3618 struct ieee80211_key_conf *keyconf,
3619 struct ieee80211_sta *sta, u32 iv32,
3620 u16 *phase1key)
3621 {
3622 struct iwl_mvm_sta *mvm_sta;
3623 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3624 bool mfp = sta ? sta->mfp : false;
3625
3626 rcu_read_lock();
3627
3628 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3629 if (WARN_ON_ONCE(!mvm_sta))
3630 goto unlock;
3631 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3632 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3633 mfp);
3634
3635 unlock:
3636 rcu_read_unlock();
3637 }
3638
3639 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3640 struct ieee80211_sta *sta)
3641 {
3642 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3643 struct iwl_mvm_add_sta_cmd cmd = {
3644 .add_modify = STA_MODE_MODIFY,
3645 .sta_id = mvmsta->sta_id,
3646 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3647 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3648 };
3649 int ret;
3650
3651 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3652 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3653 if (ret)
3654 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3655 }
3656
3657 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3658 struct ieee80211_sta *sta,
3659 enum ieee80211_frame_release_type reason,
3660 u16 cnt, u16 tids, bool more_data,
3661 bool single_sta_queue)
3662 {
3663 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3664 struct iwl_mvm_add_sta_cmd cmd = {
3665 .add_modify = STA_MODE_MODIFY,
3666 .sta_id = mvmsta->sta_id,
3667 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3668 .sleep_tx_count = cpu_to_le16(cnt),
3669 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3670 };
3671 int tid, ret;
3672 unsigned long _tids = tids;
3673
3674 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3675 * Note that this field is reserved and unused by firmware not
3676 * supporting GO uAPSD, so it's safe to always do this.
3677 */
3678 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3679 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3680
3681 /* If we're releasing frames from aggregation or dqa queues then check
3682 * if all the queues that we're releasing frames from, combined, have:
3683 * - more frames than the service period, in which case more_data
3684 * needs to be set
3685 * - fewer than 'cnt' frames, in which case we need to adjust the
3686 * firmware command (but do that unconditionally)
3687 */
3688 if (single_sta_queue) {
3689 int remaining = cnt;
3690 int sleep_tx_count;
3691
3692 spin_lock_bh(&mvmsta->lock);
3693 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3694 struct iwl_mvm_tid_data *tid_data;
3695 u16 n_queued;
3696
3697 tid_data = &mvmsta->tid_data[tid];
3698
3699 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3700 if (n_queued > remaining) {
3701 more_data = true;
3702 remaining = 0;
3703 break;
3704 }
3705 remaining -= n_queued;
3706 }
3707 sleep_tx_count = cnt - remaining;
3708 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3709 mvmsta->sleep_tx_count = sleep_tx_count;
3710 spin_unlock_bh(&mvmsta->lock);
3711
3712 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3713 if (WARN_ON(cnt - remaining == 0)) {
3714 ieee80211_sta_eosp(sta);
3715 return;
3716 }
3717 }
3718
3719 /* Note: this is ignored by firmware not supporting GO uAPSD */
3720 if (more_data)
3721 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3722
3723 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3724 mvmsta->next_status_eosp = true;
3725 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3726 } else {
3727 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3728 }
3729
3730 /* block the Tx queues until the FW updated the sleep Tx count */
3731 iwl_trans_block_txq_ptrs(mvm->trans, true);
3732
3733 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3734 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3735 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3736 if (ret)
3737 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3738 }
3739
3740 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3741 struct iwl_rx_cmd_buffer *rxb)
3742 {
3743 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3744 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3745 struct ieee80211_sta *sta;
3746 u32 sta_id = le32_to_cpu(notif->sta_id);
3747
3748 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3749 return;
3750
3751 rcu_read_lock();
3752 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3753 if (!IS_ERR_OR_NULL(sta))
3754 ieee80211_sta_eosp(sta);
3755 rcu_read_unlock();
3756 }
3757
3758 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3759 struct iwl_mvm_sta *mvmsta, bool disable)
3760 {
3761 struct iwl_mvm_add_sta_cmd cmd = {
3762 .add_modify = STA_MODE_MODIFY,
3763 .sta_id = mvmsta->sta_id,
3764 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3765 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3766 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3767 };
3768 int ret;
3769
3770 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3771 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3772 if (ret)
3773 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3774 }
3775
3776 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3777 struct ieee80211_sta *sta,
3778 bool disable)
3779 {
3780 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3781
3782 spin_lock_bh(&mvm_sta->lock);
3783
3784 if (mvm_sta->disable_tx == disable) {
3785 spin_unlock_bh(&mvm_sta->lock);
3786 return;
3787 }
3788
3789 mvm_sta->disable_tx = disable;
3790
3791 /* Tell mac80211 to start/stop queuing tx for this station */
3792 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3793
3794 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3795
3796 spin_unlock_bh(&mvm_sta->lock);
3797 }
3798
3799 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3800 struct iwl_mvm_vif *mvmvif,
3801 struct iwl_mvm_int_sta *sta,
3802 bool disable)
3803 {
3804 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3805 struct iwl_mvm_add_sta_cmd cmd = {
3806 .add_modify = STA_MODE_MODIFY,
3807 .sta_id = sta->sta_id,
3808 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3809 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3810 .mac_id_n_color = cpu_to_le32(id),
3811 };
3812 int ret;
3813
3814 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3815 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3816 if (ret)
3817 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3818 }
3819
3820 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3821 struct iwl_mvm_vif *mvmvif,
3822 bool disable)
3823 {
3824 struct ieee80211_sta *sta;
3825 struct iwl_mvm_sta *mvm_sta;
3826 int i;
3827
3828 lockdep_assert_held(&mvm->mutex);
3829
3830 /* Block/unblock all the stations of the given mvmvif */
3831 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3832 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3833 lockdep_is_held(&mvm->mutex));
3834 if (IS_ERR_OR_NULL(sta))
3835 continue;
3836
3837 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3838 if (mvm_sta->mac_id_n_color !=
3839 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3840 continue;
3841
3842 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3843 }
3844
3845 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3846 return;
3847
3848 /* Need to block/unblock also multicast station */
3849 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3850 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3851 &mvmvif->mcast_sta, disable);
3852
3853 /*
3854 * Only unblock the broadcast station (FW blocks it for immediate
3855 * quiet, not the driver)
3856 */
3857 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3858 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3859 &mvmvif->bcast_sta, disable);
3860 }
3861
3862 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3863 {
3864 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3865 struct iwl_mvm_sta *mvmsta;
3866
3867 rcu_read_lock();
3868
3869 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3870
3871 if (!WARN_ON(!mvmsta))
3872 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3873
3874 rcu_read_unlock();
3875 }
3876
3877 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3878 {
3879 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3880
3881 /*
3882 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3883 * to align the wrap around of ssn so we compare relevant values.
3884 */
3885 if (mvm->trans->trans_cfg->gen2)
3886 sn &= 0xff;
3887
3888 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3889 }
Linux with added FPC-III support