1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 * Copyright(c) 2018 Intel Corporation
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * USA
26 *
27 * The full GNU General Public License is included in this distribution
28 * in the file called COPYING.
29 *
30 * Contact Information:
31 * Intel Linux Wireless <linuxwifi@intel.com>
32 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 *
34 * BSD LICENSE
35 *
36 * Copyright(c) 2012 - 2015 Intel Corporation. All rights reserved.
37 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
38 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
39 * Copyright(c) 2018 Intel Corporation
40 * All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 *
46 * * Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * * Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in
50 * the documentation and/or other materials provided with the
51 * distribution.
52 * * Neither the name Intel Corporation nor the names of its
53 * contributors may be used to endorse or promote products derived
54 * from this software without specific prior written permission.
55 *
56 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
57 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
58 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
59 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
60 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
62 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
66 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
67 *
68 *****************************************************************************/
69 #include <net/mac80211.h>
70
71 #include "mvm.h"
72 #include "sta.h"
73 #include "rs.h"
74
75 /*
76 * New version of ADD_STA_sta command added new fields at the end of the
77 * structure, so sending the size of the relevant API's structure is enough to
78 * support both API versions.
79 */
iwl_mvm_add_sta_cmd_size(struct iwl_mvm * mvm)80 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
81 {
82 if (iwl_mvm_has_new_rx_api(mvm) ||
83 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
84 return sizeof(struct iwl_mvm_add_sta_cmd);
85 else
86 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
87 }
88
iwl_mvm_find_free_sta_id(struct iwl_mvm * mvm,enum nl80211_iftype iftype)89 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
90 enum nl80211_iftype iftype)
91 {
92 int sta_id;
93 u32 reserved_ids = 0;
94
95 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
96 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
97
98 lockdep_assert_held(&mvm->mutex);
99
100 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
101 if (iftype != NL80211_IFTYPE_STATION)
102 reserved_ids = BIT(0);
103
104 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
105 for (sta_id = 0; sta_id < ARRAY_SIZE(mvm->fw_id_to_mac_id); sta_id++) {
106 if (BIT(sta_id) & reserved_ids)
107 continue;
108
109 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
110 lockdep_is_held(&mvm->mutex)))
111 return sta_id;
112 }
113 return IWL_MVM_INVALID_STA;
114 }
115
116 /* send station add/update command to firmware */
iwl_mvm_sta_send_to_fw(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool update,unsigned int flags)117 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
118 bool update, unsigned int flags)
119 {
120 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
121 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
122 .sta_id = mvm_sta->sta_id,
123 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
124 .add_modify = update ? 1 : 0,
125 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
126 STA_FLG_MIMO_EN_MSK |
127 STA_FLG_RTS_MIMO_PROT),
128 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
129 };
130 int ret;
131 u32 status;
132 u32 agg_size = 0, mpdu_dens = 0;
133
134 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
135 add_sta_cmd.station_type = mvm_sta->sta_type;
136
137 if (!update || (flags & STA_MODIFY_QUEUES)) {
138 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
139
140 if (!iwl_mvm_has_new_tx_api(mvm)) {
141 add_sta_cmd.tfd_queue_msk =
142 cpu_to_le32(mvm_sta->tfd_queue_msk);
143
144 if (flags & STA_MODIFY_QUEUES)
145 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
146 } else {
147 WARN_ON(flags & STA_MODIFY_QUEUES);
148 }
149 }
150
151 switch (sta->bandwidth) {
152 case IEEE80211_STA_RX_BW_160:
153 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
154 /* fall through */
155 case IEEE80211_STA_RX_BW_80:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
157 /* fall through */
158 case IEEE80211_STA_RX_BW_40:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
160 /* fall through */
161 case IEEE80211_STA_RX_BW_20:
162 if (sta->ht_cap.ht_supported)
163 add_sta_cmd.station_flags |=
164 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
165 break;
166 }
167
168 switch (sta->rx_nss) {
169 case 1:
170 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
171 break;
172 case 2:
173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
174 break;
175 case 3 ... 8:
176 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
177 break;
178 }
179
180 switch (sta->smps_mode) {
181 case IEEE80211_SMPS_AUTOMATIC:
182 case IEEE80211_SMPS_NUM_MODES:
183 WARN_ON(1);
184 break;
185 case IEEE80211_SMPS_STATIC:
186 /* override NSS */
187 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
189 break;
190 case IEEE80211_SMPS_DYNAMIC:
191 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
192 break;
193 case IEEE80211_SMPS_OFF:
194 /* nothing */
195 break;
196 }
197
198 if (sta->ht_cap.ht_supported) {
199 add_sta_cmd.station_flags_msk |=
200 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
201 STA_FLG_AGG_MPDU_DENS_MSK);
202
203 mpdu_dens = sta->ht_cap.ampdu_density;
204 }
205
206 if (sta->vht_cap.vht_supported) {
207 agg_size = sta->vht_cap.cap &
208 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
209 agg_size >>=
210 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
211 } else if (sta->ht_cap.ht_supported) {
212 agg_size = sta->ht_cap.ampdu_factor;
213 }
214
215 add_sta_cmd.station_flags |=
216 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
217 add_sta_cmd.station_flags |=
218 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
219 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
220 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
221
222 if (sta->wme) {
223 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
224
225 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
226 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
227 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
228 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
229 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
230 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
231 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
232 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
233 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
234 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
235 }
236
237 status = ADD_STA_SUCCESS;
238 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
239 iwl_mvm_add_sta_cmd_size(mvm),
240 &add_sta_cmd, &status);
241 if (ret)
242 return ret;
243
244 switch (status & IWL_ADD_STA_STATUS_MASK) {
245 case ADD_STA_SUCCESS:
246 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
247 break;
248 default:
249 ret = -EIO;
250 IWL_ERR(mvm, "ADD_STA failed\n");
251 break;
252 }
253
254 return ret;
255 }
256
iwl_mvm_rx_agg_session_expired(struct timer_list * t)257 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
258 {
259 struct iwl_mvm_baid_data *data =
260 from_timer(data, t, session_timer);
261 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
262 struct iwl_mvm_baid_data *ba_data;
263 struct ieee80211_sta *sta;
264 struct iwl_mvm_sta *mvm_sta;
265 unsigned long timeout;
266
267 rcu_read_lock();
268
269 ba_data = rcu_dereference(*rcu_ptr);
270
271 if (WARN_ON(!ba_data))
272 goto unlock;
273
274 if (!ba_data->timeout)
275 goto unlock;
276
277 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
278 if (time_is_after_jiffies(timeout)) {
279 mod_timer(&ba_data->session_timer, timeout);
280 goto unlock;
281 }
282
283 /* Timer expired */
284 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
285
286 /*
287 * sta should be valid unless the following happens:
288 * The firmware asserts which triggers a reconfig flow, but
289 * the reconfig fails before we set the pointer to sta into
290 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
291 * A-MDPU and hence the timer continues to run. Then, the
292 * timer expires and sta is NULL.
293 */
294 if (!sta)
295 goto unlock;
296
297 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
298 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
299 sta->addr, ba_data->tid);
300 unlock:
301 rcu_read_unlock();
302 }
303
304 /* Disable aggregations for a bitmap of TIDs for a given station */
iwl_mvm_invalidate_sta_queue(struct iwl_mvm * mvm,int queue,unsigned long disable_agg_tids,bool remove_queue)305 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
306 unsigned long disable_agg_tids,
307 bool remove_queue)
308 {
309 struct iwl_mvm_add_sta_cmd cmd = {};
310 struct ieee80211_sta *sta;
311 struct iwl_mvm_sta *mvmsta;
312 u32 status;
313 u8 sta_id;
314 int ret;
315
316 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
317 return -EINVAL;
318
319 spin_lock_bh(&mvm->queue_info_lock);
320 sta_id = mvm->queue_info[queue].ra_sta_id;
321 spin_unlock_bh(&mvm->queue_info_lock);
322
323 rcu_read_lock();
324
325 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
326
327 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
328 rcu_read_unlock();
329 return -EINVAL;
330 }
331
332 mvmsta = iwl_mvm_sta_from_mac80211(sta);
333
334 mvmsta->tid_disable_agg |= disable_agg_tids;
335
336 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
337 cmd.sta_id = mvmsta->sta_id;
338 cmd.add_modify = STA_MODE_MODIFY;
339 cmd.modify_mask = STA_MODIFY_QUEUES;
340 if (disable_agg_tids)
341 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
342 if (remove_queue)
343 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
344 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
345 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
346
347 rcu_read_unlock();
348
349 /* Notify FW of queue removal from the STA queues */
350 status = ADD_STA_SUCCESS;
351 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
352 iwl_mvm_add_sta_cmd_size(mvm),
353 &cmd, &status);
354
355 return ret;
356 }
357
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)358 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
359 {
360 struct ieee80211_sta *sta;
361 struct iwl_mvm_sta *mvmsta;
362 unsigned long tid_bitmap;
363 unsigned long agg_tids = 0;
364 u8 sta_id;
365 int tid;
366
367 lockdep_assert_held(&mvm->mutex);
368
369 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
370 return -EINVAL;
371
372 spin_lock_bh(&mvm->queue_info_lock);
373 sta_id = mvm->queue_info[queue].ra_sta_id;
374 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
375 spin_unlock_bh(&mvm->queue_info_lock);
376
377 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
378 lockdep_is_held(&mvm->mutex));
379
380 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
381 return -EINVAL;
382
383 mvmsta = iwl_mvm_sta_from_mac80211(sta);
384
385 spin_lock_bh(&mvmsta->lock);
386 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
387 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
388 agg_tids |= BIT(tid);
389 }
390 spin_unlock_bh(&mvmsta->lock);
391
392 return agg_tids;
393 }
394
395 /*
396 * Remove a queue from a station's resources.
397 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
398 * doesn't disable the queue
399 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)400 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
401 {
402 struct ieee80211_sta *sta;
403 struct iwl_mvm_sta *mvmsta;
404 unsigned long tid_bitmap;
405 unsigned long disable_agg_tids = 0;
406 u8 sta_id;
407 int tid;
408
409 lockdep_assert_held(&mvm->mutex);
410
411 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
412 return -EINVAL;
413
414 spin_lock_bh(&mvm->queue_info_lock);
415 sta_id = mvm->queue_info[queue].ra_sta_id;
416 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
417 spin_unlock_bh(&mvm->queue_info_lock);
418
419 rcu_read_lock();
420
421 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
422
423 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
424 rcu_read_unlock();
425 return 0;
426 }
427
428 mvmsta = iwl_mvm_sta_from_mac80211(sta);
429
430 spin_lock_bh(&mvmsta->lock);
431 /* Unmap MAC queues and TIDs from this queue */
432 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
433 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
434 disable_agg_tids |= BIT(tid);
435 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
436 }
437
438 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
439 spin_unlock_bh(&mvmsta->lock);
440
441 rcu_read_unlock();
442
443 return disable_agg_tids;
444 }
445
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,bool same_sta)446 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
447 bool same_sta)
448 {
449 struct iwl_mvm_sta *mvmsta;
450 u8 txq_curr_ac, sta_id, tid;
451 unsigned long disable_agg_tids = 0;
452 int ret;
453
454 lockdep_assert_held(&mvm->mutex);
455
456 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
457 return -EINVAL;
458
459 spin_lock_bh(&mvm->queue_info_lock);
460 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
461 sta_id = mvm->queue_info[queue].ra_sta_id;
462 tid = mvm->queue_info[queue].txq_tid;
463 spin_unlock_bh(&mvm->queue_info_lock);
464
465 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
466 if (WARN_ON(!mvmsta))
467 return -EINVAL;
468
469 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
470 /* Disable the queue */
471 if (disable_agg_tids)
472 iwl_mvm_invalidate_sta_queue(mvm, queue,
473 disable_agg_tids, false);
474
475 ret = iwl_mvm_disable_txq(mvm, queue,
476 mvmsta->vif->hw_queue[txq_curr_ac],
477 tid, 0);
478 if (ret) {
479 /* Re-mark the inactive queue as inactive */
480 spin_lock_bh(&mvm->queue_info_lock);
481 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
482 spin_unlock_bh(&mvm->queue_info_lock);
483 IWL_ERR(mvm,
484 "Failed to free inactive queue %d (ret=%d)\n",
485 queue, ret);
486
487 return ret;
488 }
489
490 /* If TXQ is allocated to another STA, update removal in FW */
491 if (!same_sta)
492 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
493
494 return 0;
495 }
496
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)497 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
498 unsigned long tfd_queue_mask, u8 ac)
499 {
500 int queue = 0;
501 u8 ac_to_queue[IEEE80211_NUM_ACS];
502 int i;
503
504 lockdep_assert_held(&mvm->queue_info_lock);
505 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
506 return -EINVAL;
507
508 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
509
510 /* See what ACs the existing queues for this STA have */
511 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
512 /* Only DATA queues can be shared */
513 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
514 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
515 continue;
516
517 /* Don't try and take queues being reconfigured */
518 if (mvm->queue_info[queue].status ==
519 IWL_MVM_QUEUE_RECONFIGURING)
520 continue;
521
522 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
523 }
524
525 /*
526 * The queue to share is chosen only from DATA queues as follows (in
527 * descending priority):
528 * 1. An AC_BE queue
529 * 2. Same AC queue
530 * 3. Highest AC queue that is lower than new AC
531 * 4. Any existing AC (there always is at least 1 DATA queue)
532 */
533
534 /* Priority 1: An AC_BE queue */
535 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
536 queue = ac_to_queue[IEEE80211_AC_BE];
537 /* Priority 2: Same AC queue */
538 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
539 queue = ac_to_queue[ac];
540 /* Priority 3a: If new AC is VO and VI exists - use VI */
541 else if (ac == IEEE80211_AC_VO &&
542 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
543 queue = ac_to_queue[IEEE80211_AC_VI];
544 /* Priority 3b: No BE so only AC less than the new one is BK */
545 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
546 queue = ac_to_queue[IEEE80211_AC_BK];
547 /* Priority 4a: No BE nor BK - use VI if exists */
548 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
549 queue = ac_to_queue[IEEE80211_AC_VI];
550 /* Priority 4b: No BE, BK nor VI - use VO if exists */
551 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
552 queue = ac_to_queue[IEEE80211_AC_VO];
553
554 /* Make sure queue found (or not) is legal */
555 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
556 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
557 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
558 IWL_ERR(mvm, "No DATA queues available to share\n");
559 return -ENOSPC;
560 }
561
562 /* Make sure the queue isn't in the middle of being reconfigured */
563 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
564 IWL_ERR(mvm,
565 "TXQ %d is in the middle of re-config - try again\n",
566 queue);
567 return -EBUSY;
568 }
569
570 return queue;
571 }
572
573 /*
574 * If a given queue has a higher AC than the TID stream that is being compared
575 * to, the queue needs to be redirected to the lower AC. This function does that
576 * in such a case, otherwise - if no redirection required - it does nothing,
577 * unless the %force param is true.
578 */
iwl_mvm_scd_queue_redirect(struct iwl_mvm * mvm,int queue,int tid,int ac,int ssn,unsigned int wdg_timeout,bool force)579 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
580 int ac, int ssn, unsigned int wdg_timeout,
581 bool force)
582 {
583 struct iwl_scd_txq_cfg_cmd cmd = {
584 .scd_queue = queue,
585 .action = SCD_CFG_DISABLE_QUEUE,
586 };
587 bool shared_queue;
588 unsigned long mq;
589 int ret;
590
591 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
592 return -EINVAL;
593
594 /*
595 * If the AC is lower than current one - FIFO needs to be redirected to
596 * the lowest one of the streams in the queue. Check if this is needed
597 * here.
598 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
599 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
600 * we need to check if the numerical value of X is LARGER than of Y.
601 */
602 spin_lock_bh(&mvm->queue_info_lock);
603 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
604 spin_unlock_bh(&mvm->queue_info_lock);
605
606 IWL_DEBUG_TX_QUEUES(mvm,
607 "No redirection needed on TXQ #%d\n",
608 queue);
609 return 0;
610 }
611
612 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
613 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
614 cmd.tid = mvm->queue_info[queue].txq_tid;
615 mq = mvm->hw_queue_to_mac80211[queue];
616 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
617 spin_unlock_bh(&mvm->queue_info_lock);
618
619 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
620 queue, iwl_mvm_ac_to_tx_fifo[ac]);
621
622 /* Stop MAC queues and wait for this queue to empty */
623 iwl_mvm_stop_mac_queues(mvm, mq);
624 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
625 if (ret) {
626 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
627 queue);
628 ret = -EIO;
629 goto out;
630 }
631
632 /* Before redirecting the queue we need to de-activate it */
633 iwl_trans_txq_disable(mvm->trans, queue, false);
634 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
635 if (ret)
636 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
637 ret);
638
639 /* Make sure the SCD wrptr is correctly set before reconfiguring */
640 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
641
642 /* Update the TID "owner" of the queue */
643 spin_lock_bh(&mvm->queue_info_lock);
644 mvm->queue_info[queue].txq_tid = tid;
645 spin_unlock_bh(&mvm->queue_info_lock);
646
647 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
648
649 /* Redirect to lower AC */
650 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
651 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
652
653 /* Update AC marking of the queue */
654 spin_lock_bh(&mvm->queue_info_lock);
655 mvm->queue_info[queue].mac80211_ac = ac;
656 spin_unlock_bh(&mvm->queue_info_lock);
657
658 /*
659 * Mark queue as shared in transport if shared
660 * Note this has to be done after queue enablement because enablement
661 * can also set this value, and there is no indication there to shared
662 * queues
663 */
664 if (shared_queue)
665 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
666
667 out:
668 /* Continue using the MAC queues */
669 iwl_mvm_start_mac_queues(mvm, mq);
670
671 return ret;
672 }
673
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)674 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
675 struct ieee80211_sta *sta, u8 ac,
676 int tid)
677 {
678 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
679 unsigned int wdg_timeout =
680 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
681 u8 mac_queue = mvmsta->vif->hw_queue[ac];
682 int queue = -1;
683
684 lockdep_assert_held(&mvm->mutex);
685
686 IWL_DEBUG_TX_QUEUES(mvm,
687 "Allocating queue for sta %d on tid %d\n",
688 mvmsta->sta_id, tid);
689 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
690 wdg_timeout);
691 if (queue < 0)
692 return queue;
693
694 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
695
696 spin_lock_bh(&mvmsta->lock);
697 mvmsta->tid_data[tid].txq_id = queue;
698 mvmsta->tid_data[tid].is_tid_active = true;
699 spin_unlock_bh(&mvmsta->lock);
700
701 return 0;
702 }
703
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid,struct ieee80211_hdr * hdr)704 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
705 struct ieee80211_sta *sta, u8 ac, int tid,
706 struct ieee80211_hdr *hdr)
707 {
708 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
709 struct iwl_trans_txq_scd_cfg cfg = {
710 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
711 .sta_id = mvmsta->sta_id,
712 .tid = tid,
713 .frame_limit = IWL_FRAME_LIMIT,
714 };
715 unsigned int wdg_timeout =
716 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
717 u8 mac_queue = mvmsta->vif->hw_queue[ac];
718 int queue = -1;
719 bool using_inactive_queue = false, same_sta = false;
720 unsigned long disable_agg_tids = 0;
721 enum iwl_mvm_agg_state queue_state;
722 bool shared_queue = false, inc_ssn;
723 int ssn;
724 unsigned long tfd_queue_mask;
725 int ret;
726
727 lockdep_assert_held(&mvm->mutex);
728
729 if (iwl_mvm_has_new_tx_api(mvm))
730 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
731
732 spin_lock_bh(&mvmsta->lock);
733 tfd_queue_mask = mvmsta->tfd_queue_msk;
734 spin_unlock_bh(&mvmsta->lock);
735
736 spin_lock_bh(&mvm->queue_info_lock);
737
738 /*
739 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
740 * exists
741 */
742 if (!ieee80211_is_data_qos(hdr->frame_control) ||
743 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
744 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
745 IWL_MVM_DQA_MIN_MGMT_QUEUE,
746 IWL_MVM_DQA_MAX_MGMT_QUEUE);
747 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
748 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
749 queue);
750
751 /* If no such queue is found, we'll use a DATA queue instead */
752 }
753
754 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
755 (mvm->queue_info[mvmsta->reserved_queue].status ==
756 IWL_MVM_QUEUE_RESERVED ||
757 mvm->queue_info[mvmsta->reserved_queue].status ==
758 IWL_MVM_QUEUE_INACTIVE)) {
759 queue = mvmsta->reserved_queue;
760 mvm->queue_info[queue].reserved = true;
761 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
762 }
763
764 if (queue < 0)
765 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
766 IWL_MVM_DQA_MIN_DATA_QUEUE,
767 IWL_MVM_DQA_MAX_DATA_QUEUE);
768
769 /*
770 * Check if this queue is already allocated but inactive.
771 * In such a case, we'll need to first free this queue before enabling
772 * it again, so we'll mark it as reserved to make sure no new traffic
773 * arrives on it
774 */
775 if (queue > 0 &&
776 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
777 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
778 using_inactive_queue = true;
779 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
780 IWL_DEBUG_TX_QUEUES(mvm,
781 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
782 queue, mvmsta->sta_id, tid);
783 }
784
785 /* No free queue - we'll have to share */
786 if (queue <= 0) {
787 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
788 if (queue > 0) {
789 shared_queue = true;
790 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
791 }
792 }
793
794 /*
795 * Mark TXQ as ready, even though it hasn't been fully configured yet,
796 * to make sure no one else takes it.
797 * This will allow avoiding re-acquiring the lock at the end of the
798 * configuration. On error we'll mark it back as free.
799 */
800 if ((queue > 0) && !shared_queue)
801 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
802
803 spin_unlock_bh(&mvm->queue_info_lock);
804
805 /* This shouldn't happen - out of queues */
806 if (WARN_ON(queue <= 0)) {
807 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
808 tid, cfg.sta_id);
809 return queue;
810 }
811
812 /*
813 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
814 * but for configuring the SCD to send A-MPDUs we need to mark the queue
815 * as aggregatable.
816 * Mark all DATA queues as allowing to be aggregated at some point
817 */
818 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
819 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
820
821 /*
822 * If this queue was previously inactive (idle) - we need to free it
823 * first
824 */
825 if (using_inactive_queue) {
826 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
827 if (ret)
828 return ret;
829 }
830
831 IWL_DEBUG_TX_QUEUES(mvm,
832 "Allocating %squeue #%d to sta %d on tid %d\n",
833 shared_queue ? "shared " : "", queue,
834 mvmsta->sta_id, tid);
835
836 if (shared_queue) {
837 /* Disable any open aggs on this queue */
838 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
839
840 if (disable_agg_tids) {
841 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
842 queue);
843 iwl_mvm_invalidate_sta_queue(mvm, queue,
844 disable_agg_tids, false);
845 }
846 }
847
848 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
849 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
850 ssn, &cfg, wdg_timeout);
851 if (inc_ssn) {
852 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
853 le16_add_cpu(&hdr->seq_ctrl, 0x10);
854 }
855
856 /*
857 * Mark queue as shared in transport if shared
858 * Note this has to be done after queue enablement because enablement
859 * can also set this value, and there is no indication there to shared
860 * queues
861 */
862 if (shared_queue)
863 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
864
865 spin_lock_bh(&mvmsta->lock);
866 /*
867 * This looks racy, but it is not. We have only one packet for
868 * this ra/tid in our Tx path since we stop the Qdisc when we
869 * need to allocate a new TFD queue.
870 */
871 if (inc_ssn)
872 mvmsta->tid_data[tid].seq_number += 0x10;
873 mvmsta->tid_data[tid].txq_id = queue;
874 mvmsta->tid_data[tid].is_tid_active = true;
875 mvmsta->tfd_queue_msk |= BIT(queue);
876 queue_state = mvmsta->tid_data[tid].state;
877
878 if (mvmsta->reserved_queue == queue)
879 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
880 spin_unlock_bh(&mvmsta->lock);
881
882 if (!shared_queue) {
883 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
884 if (ret)
885 goto out_err;
886
887 /* If we need to re-enable aggregations... */
888 if (queue_state == IWL_AGG_ON) {
889 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
890 if (ret)
891 goto out_err;
892 }
893 } else {
894 /* Redirect queue, if needed */
895 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
896 wdg_timeout, false);
897 if (ret)
898 goto out_err;
899 }
900
901 return 0;
902
903 out_err:
904 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
905
906 return ret;
907 }
908
iwl_mvm_change_queue_owner(struct iwl_mvm * mvm,int queue)909 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
910 {
911 struct iwl_scd_txq_cfg_cmd cmd = {
912 .scd_queue = queue,
913 .action = SCD_CFG_UPDATE_QUEUE_TID,
914 };
915 int tid;
916 unsigned long tid_bitmap;
917 int ret;
918
919 lockdep_assert_held(&mvm->mutex);
920
921 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
922 return;
923
924 spin_lock_bh(&mvm->queue_info_lock);
925 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
926 spin_unlock_bh(&mvm->queue_info_lock);
927
928 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
929 return;
930
931 /* Find any TID for queue */
932 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
933 cmd.tid = tid;
934 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
935
936 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
937 if (ret) {
938 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
939 queue, ret);
940 return;
941 }
942
943 spin_lock_bh(&mvm->queue_info_lock);
944 mvm->queue_info[queue].txq_tid = tid;
945 spin_unlock_bh(&mvm->queue_info_lock);
946 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
947 queue, tid);
948 }
949
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)950 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
951 {
952 struct ieee80211_sta *sta;
953 struct iwl_mvm_sta *mvmsta;
954 u8 sta_id;
955 int tid = -1;
956 unsigned long tid_bitmap;
957 unsigned int wdg_timeout;
958 int ssn;
959 int ret = true;
960
961 /* queue sharing is disabled on new TX path */
962 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
963 return;
964
965 lockdep_assert_held(&mvm->mutex);
966
967 spin_lock_bh(&mvm->queue_info_lock);
968 sta_id = mvm->queue_info[queue].ra_sta_id;
969 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
970 spin_unlock_bh(&mvm->queue_info_lock);
971
972 /* Find TID for queue, and make sure it is the only one on the queue */
973 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
974 if (tid_bitmap != BIT(tid)) {
975 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
976 queue, tid_bitmap);
977 return;
978 }
979
980 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
981 tid);
982
983 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
984 lockdep_is_held(&mvm->mutex));
985
986 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
987 return;
988
989 mvmsta = iwl_mvm_sta_from_mac80211(sta);
990 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
991
992 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
993
994 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
995 tid_to_mac80211_ac[tid], ssn,
996 wdg_timeout, true);
997 if (ret) {
998 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
999 return;
1000 }
1001
1002 /* If aggs should be turned back on - do it */
1003 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1004 struct iwl_mvm_add_sta_cmd cmd = {0};
1005
1006 mvmsta->tid_disable_agg &= ~BIT(tid);
1007
1008 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1009 cmd.sta_id = mvmsta->sta_id;
1010 cmd.add_modify = STA_MODE_MODIFY;
1011 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1012 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1013 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1014
1015 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1016 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1017 if (!ret) {
1018 IWL_DEBUG_TX_QUEUES(mvm,
1019 "TXQ #%d is now aggregated again\n",
1020 queue);
1021
1022 /* Mark queue intenally as aggregating again */
1023 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1024 }
1025 }
1026
1027 spin_lock_bh(&mvm->queue_info_lock);
1028 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1029 spin_unlock_bh(&mvm->queue_info_lock);
1030 }
1031
iwl_mvm_tid_to_ac_queue(int tid)1032 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1033 {
1034 if (tid == IWL_MAX_TID_COUNT)
1035 return IEEE80211_AC_VO; /* MGMT */
1036
1037 return tid_to_mac80211_ac[tid];
1038 }
1039
iwl_mvm_tx_deferred_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid)1040 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1041 struct ieee80211_sta *sta, int tid)
1042 {
1043 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1044 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1045 struct sk_buff *skb;
1046 struct ieee80211_hdr *hdr;
1047 struct sk_buff_head deferred_tx;
1048 u8 mac_queue;
1049 bool no_queue = false; /* Marks if there is a problem with the queue */
1050 u8 ac;
1051
1052 lockdep_assert_held(&mvm->mutex);
1053
1054 skb = skb_peek(&tid_data->deferred_tx_frames);
1055 if (!skb)
1056 return;
1057 hdr = (void *)skb->data;
1058
1059 ac = iwl_mvm_tid_to_ac_queue(tid);
1060 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1061
1062 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1063 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1064 IWL_ERR(mvm,
1065 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1066 mvmsta->sta_id, tid);
1067
1068 /*
1069 * Mark queue as problematic so later the deferred traffic is
1070 * freed, as we can do nothing with it
1071 */
1072 no_queue = true;
1073 }
1074
1075 __skb_queue_head_init(&deferred_tx);
1076
1077 /* Disable bottom-halves when entering TX path */
1078 local_bh_disable();
1079 spin_lock(&mvmsta->lock);
1080 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1081 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1082 spin_unlock(&mvmsta->lock);
1083
1084 while ((skb = __skb_dequeue(&deferred_tx)))
1085 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1086 ieee80211_free_txskb(mvm->hw, skb);
1087 local_bh_enable();
1088
1089 /* Wake queue */
1090 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1091 }
1092
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1093 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1094 {
1095 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1096 add_stream_wk);
1097 struct ieee80211_sta *sta;
1098 struct iwl_mvm_sta *mvmsta;
1099 unsigned long deferred_tid_traffic;
1100 int queue, sta_id, tid;
1101
1102 /* Check inactivity of queues */
1103 iwl_mvm_inactivity_check(mvm);
1104
1105 mutex_lock(&mvm->mutex);
1106
1107 /* No queue reconfiguration in TVQM mode */
1108 if (iwl_mvm_has_new_tx_api(mvm))
1109 goto alloc_queues;
1110
1111 /* Reconfigure queues requiring reconfiguation */
1112 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1113 bool reconfig;
1114 bool change_owner;
1115
1116 spin_lock_bh(&mvm->queue_info_lock);
1117 reconfig = (mvm->queue_info[queue].status ==
1118 IWL_MVM_QUEUE_RECONFIGURING);
1119
1120 /*
1121 * We need to take into account a situation in which a TXQ was
1122 * allocated to TID x, and then turned shared by adding TIDs y
1123 * and z. If TID x becomes inactive and is removed from the TXQ,
1124 * ownership must be given to one of the remaining TIDs.
1125 * This is mainly because if TID x continues - a new queue can't
1126 * be allocated for it as long as it is an owner of another TXQ.
1127 */
1128 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1129 BIT(mvm->queue_info[queue].txq_tid)) &&
1130 (mvm->queue_info[queue].status ==
1131 IWL_MVM_QUEUE_SHARED);
1132 spin_unlock_bh(&mvm->queue_info_lock);
1133
1134 if (reconfig)
1135 iwl_mvm_unshare_queue(mvm, queue);
1136 else if (change_owner)
1137 iwl_mvm_change_queue_owner(mvm, queue);
1138 }
1139
1140 alloc_queues:
1141 /* Go over all stations with deferred traffic */
1142 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1143 IWL_MVM_STATION_COUNT) {
1144 clear_bit(sta_id, mvm->sta_deferred_frames);
1145 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1146 lockdep_is_held(&mvm->mutex));
1147 if (IS_ERR_OR_NULL(sta))
1148 continue;
1149
1150 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1151 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1152
1153 for_each_set_bit(tid, &deferred_tid_traffic,
1154 IWL_MAX_TID_COUNT + 1)
1155 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1156 }
1157
1158 mutex_unlock(&mvm->mutex);
1159 }
1160
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1161 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1162 struct ieee80211_sta *sta,
1163 enum nl80211_iftype vif_type)
1164 {
1165 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1166 int queue;
1167 bool using_inactive_queue = false, same_sta = false;
1168
1169 /* queue reserving is disabled on new TX path */
1170 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1171 return 0;
1172
1173 /*
1174 * Check for inactive queues, so we don't reach a situation where we
1175 * can't add a STA due to a shortage in queues that doesn't really exist
1176 */
1177 iwl_mvm_inactivity_check(mvm);
1178
1179 spin_lock_bh(&mvm->queue_info_lock);
1180
1181 /* Make sure we have free resources for this STA */
1182 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1183 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1184 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1185 IWL_MVM_QUEUE_FREE))
1186 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1187 else
1188 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1189 IWL_MVM_DQA_MIN_DATA_QUEUE,
1190 IWL_MVM_DQA_MAX_DATA_QUEUE);
1191 if (queue < 0) {
1192 spin_unlock_bh(&mvm->queue_info_lock);
1193 IWL_ERR(mvm, "No available queues for new station\n");
1194 return -ENOSPC;
1195 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1196 /*
1197 * If this queue is already allocated but inactive we'll need to
1198 * first free this queue before enabling it again, we'll mark
1199 * it as reserved to make sure no new traffic arrives on it
1200 */
1201 using_inactive_queue = true;
1202 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1203 }
1204 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1205
1206 spin_unlock_bh(&mvm->queue_info_lock);
1207
1208 mvmsta->reserved_queue = queue;
1209
1210 if (using_inactive_queue)
1211 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1212
1213 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1214 queue, mvmsta->sta_id);
1215
1216 return 0;
1217 }
1218
1219 /*
1220 * In DQA mode, after a HW restart the queues should be allocated as before, in
1221 * order to avoid race conditions when there are shared queues. This function
1222 * does the re-mapping and queue allocation.
1223 *
1224 * Note that re-enabling aggregations isn't done in this function.
1225 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1226 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1227 struct iwl_mvm_sta *mvm_sta)
1228 {
1229 unsigned int wdg_timeout =
1230 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1231 int i;
1232 struct iwl_trans_txq_scd_cfg cfg = {
1233 .sta_id = mvm_sta->sta_id,
1234 .frame_limit = IWL_FRAME_LIMIT,
1235 };
1236
1237 /* Make sure reserved queue is still marked as such (if allocated) */
1238 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1239 mvm->queue_info[mvm_sta->reserved_queue].status =
1240 IWL_MVM_QUEUE_RESERVED;
1241
1242 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1243 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1244 int txq_id = tid_data->txq_id;
1245 int ac;
1246 u8 mac_queue;
1247
1248 if (txq_id == IWL_MVM_INVALID_QUEUE)
1249 continue;
1250
1251 skb_queue_head_init(&tid_data->deferred_tx_frames);
1252
1253 ac = tid_to_mac80211_ac[i];
1254 mac_queue = mvm_sta->vif->hw_queue[ac];
1255
1256 if (iwl_mvm_has_new_tx_api(mvm)) {
1257 IWL_DEBUG_TX_QUEUES(mvm,
1258 "Re-mapping sta %d tid %d\n",
1259 mvm_sta->sta_id, i);
1260 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1261 mvm_sta->sta_id,
1262 i, wdg_timeout);
1263 tid_data->txq_id = txq_id;
1264
1265 /*
1266 * Since we don't set the seq number after reset, and HW
1267 * sets it now, FW reset will cause the seq num to start
1268 * at 0 again, so driver will need to update it
1269 * internally as well, so it keeps in sync with real val
1270 */
1271 tid_data->seq_number = 0;
1272 } else {
1273 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1274
1275 cfg.tid = i;
1276 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1277 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1278 txq_id ==
1279 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1280
1281 IWL_DEBUG_TX_QUEUES(mvm,
1282 "Re-mapping sta %d tid %d to queue %d\n",
1283 mvm_sta->sta_id, i, txq_id);
1284
1285 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1286 wdg_timeout);
1287 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1288 }
1289 }
1290 }
1291
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1292 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1293 struct iwl_mvm_int_sta *sta,
1294 const u8 *addr,
1295 u16 mac_id, u16 color)
1296 {
1297 struct iwl_mvm_add_sta_cmd cmd;
1298 int ret;
1299 u32 status = ADD_STA_SUCCESS;
1300
1301 lockdep_assert_held(&mvm->mutex);
1302
1303 memset(&cmd, 0, sizeof(cmd));
1304 cmd.sta_id = sta->sta_id;
1305 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1306 color));
1307 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1308 cmd.station_type = sta->type;
1309
1310 if (!iwl_mvm_has_new_tx_api(mvm))
1311 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1312 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1313
1314 if (addr)
1315 memcpy(cmd.addr, addr, ETH_ALEN);
1316
1317 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1318 iwl_mvm_add_sta_cmd_size(mvm),
1319 &cmd, &status);
1320 if (ret)
1321 return ret;
1322
1323 switch (status & IWL_ADD_STA_STATUS_MASK) {
1324 case ADD_STA_SUCCESS:
1325 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1326 return 0;
1327 default:
1328 ret = -EIO;
1329 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1330 status);
1331 break;
1332 }
1333 return ret;
1334 }
1335
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1336 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1337 struct ieee80211_vif *vif,
1338 struct ieee80211_sta *sta)
1339 {
1340 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1341 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1342 struct iwl_mvm_rxq_dup_data *dup_data;
1343 int i, ret, sta_id;
1344 bool sta_update = false;
1345 unsigned int sta_flags = 0;
1346
1347 lockdep_assert_held(&mvm->mutex);
1348
1349 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1350 sta_id = iwl_mvm_find_free_sta_id(mvm,
1351 ieee80211_vif_type_p2p(vif));
1352 else
1353 sta_id = mvm_sta->sta_id;
1354
1355 if (sta_id == IWL_MVM_INVALID_STA)
1356 return -ENOSPC;
1357
1358 spin_lock_init(&mvm_sta->lock);
1359
1360 /* if this is a HW restart re-alloc existing queues */
1361 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1362 struct iwl_mvm_int_sta tmp_sta = {
1363 .sta_id = sta_id,
1364 .type = mvm_sta->sta_type,
1365 };
1366
1367 /*
1368 * First add an empty station since allocating
1369 * a queue requires a valid station
1370 */
1371 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1372 mvmvif->id, mvmvif->color);
1373 if (ret)
1374 goto err;
1375
1376 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1377 sta_update = true;
1378 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1379 goto update_fw;
1380 }
1381
1382 mvm_sta->sta_id = sta_id;
1383 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1384 mvmvif->color);
1385 mvm_sta->vif = vif;
1386 if (!mvm->trans->cfg->gen2)
1387 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1388 else
1389 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1390 mvm_sta->tx_protection = 0;
1391 mvm_sta->tt_tx_protection = false;
1392 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1393
1394 /* HW restart, don't assume the memory has been zeroed */
1395 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1396 mvm_sta->tfd_queue_msk = 0;
1397
1398 /* for HW restart - reset everything but the sequence number */
1399 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1400 u16 seq = mvm_sta->tid_data[i].seq_number;
1401 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1402 mvm_sta->tid_data[i].seq_number = seq;
1403
1404 /*
1405 * Mark all queues for this STA as unallocated and defer TX
1406 * frames until the queue is allocated
1407 */
1408 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1409 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1410 }
1411 mvm_sta->deferred_traffic_tid_map = 0;
1412 mvm_sta->agg_tids = 0;
1413
1414 if (iwl_mvm_has_new_rx_api(mvm) &&
1415 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1416 int q;
1417
1418 dup_data = kcalloc(mvm->trans->num_rx_queues,
1419 sizeof(*dup_data), GFP_KERNEL);
1420 if (!dup_data)
1421 return -ENOMEM;
1422 /*
1423 * Initialize all the last_seq values to 0xffff which can never
1424 * compare equal to the frame's seq_ctrl in the check in
1425 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1426 * number and fragmented packets don't reach that function.
1427 *
1428 * This thus allows receiving a packet with seqno 0 and the
1429 * retry bit set as the very first packet on a new TID.
1430 */
1431 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1432 memset(dup_data[q].last_seq, 0xff,
1433 sizeof(dup_data[q].last_seq));
1434 mvm_sta->dup_data = dup_data;
1435 }
1436
1437 if (!iwl_mvm_has_new_tx_api(mvm)) {
1438 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1439 ieee80211_vif_type_p2p(vif));
1440 if (ret)
1441 goto err;
1442 }
1443
1444 /*
1445 * if rs is registered with mac80211, then "add station" will be handled
1446 * via the corresponding ops, otherwise need to notify rate scaling here
1447 */
1448 if (iwl_mvm_has_tlc_offload(mvm))
1449 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1450
1451 update_fw:
1452 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1453 if (ret)
1454 goto err;
1455
1456 if (vif->type == NL80211_IFTYPE_STATION) {
1457 if (!sta->tdls) {
1458 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1459 mvmvif->ap_sta_id = sta_id;
1460 } else {
1461 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1462 }
1463 }
1464
1465 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1466
1467 return 0;
1468
1469 err:
1470 return ret;
1471 }
1472
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1473 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1474 bool drain)
1475 {
1476 struct iwl_mvm_add_sta_cmd cmd = {};
1477 int ret;
1478 u32 status;
1479
1480 lockdep_assert_held(&mvm->mutex);
1481
1482 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1483 cmd.sta_id = mvmsta->sta_id;
1484 cmd.add_modify = STA_MODE_MODIFY;
1485 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1486 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1487
1488 status = ADD_STA_SUCCESS;
1489 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1490 iwl_mvm_add_sta_cmd_size(mvm),
1491 &cmd, &status);
1492 if (ret)
1493 return ret;
1494
1495 switch (status & IWL_ADD_STA_STATUS_MASK) {
1496 case ADD_STA_SUCCESS:
1497 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1498 mvmsta->sta_id);
1499 break;
1500 default:
1501 ret = -EIO;
1502 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1503 mvmsta->sta_id);
1504 break;
1505 }
1506
1507 return ret;
1508 }
1509
1510 /*
1511 * Remove a station from the FW table. Before sending the command to remove
1512 * the station validate that the station is indeed known to the driver (sanity
1513 * only).
1514 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1515 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1516 {
1517 struct ieee80211_sta *sta;
1518 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1519 .sta_id = sta_id,
1520 };
1521 int ret;
1522
1523 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1524 lockdep_is_held(&mvm->mutex));
1525
1526 /* Note: internal stations are marked as error values */
1527 if (!sta) {
1528 IWL_ERR(mvm, "Invalid station id\n");
1529 return -EINVAL;
1530 }
1531
1532 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1533 sizeof(rm_sta_cmd), &rm_sta_cmd);
1534 if (ret) {
1535 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1536 return ret;
1537 }
1538
1539 return 0;
1540 }
1541
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_sta * mvm_sta)1542 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1543 struct ieee80211_vif *vif,
1544 struct iwl_mvm_sta *mvm_sta)
1545 {
1546 int ac;
1547 int i;
1548
1549 lockdep_assert_held(&mvm->mutex);
1550
1551 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1552 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1553 continue;
1554
1555 ac = iwl_mvm_tid_to_ac_queue(i);
1556 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1557 vif->hw_queue[ac], i, 0);
1558 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1559 }
1560 }
1561
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1562 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1563 struct iwl_mvm_sta *mvm_sta)
1564 {
1565 int i;
1566
1567 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1568 u16 txq_id;
1569 int ret;
1570
1571 spin_lock_bh(&mvm_sta->lock);
1572 txq_id = mvm_sta->tid_data[i].txq_id;
1573 spin_unlock_bh(&mvm_sta->lock);
1574
1575 if (txq_id == IWL_MVM_INVALID_QUEUE)
1576 continue;
1577
1578 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1579 if (ret)
1580 return ret;
1581 }
1582
1583 return 0;
1584 }
1585
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1586 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1587 struct ieee80211_vif *vif,
1588 struct ieee80211_sta *sta)
1589 {
1590 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1591 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1592 u8 sta_id = mvm_sta->sta_id;
1593 int ret;
1594
1595 lockdep_assert_held(&mvm->mutex);
1596
1597 if (iwl_mvm_has_new_rx_api(mvm))
1598 kfree(mvm_sta->dup_data);
1599
1600 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1601 if (ret)
1602 return ret;
1603
1604 /* flush its queues here since we are freeing mvm_sta */
1605 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1606 if (ret)
1607 return ret;
1608 if (iwl_mvm_has_new_tx_api(mvm)) {
1609 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1610 } else {
1611 u32 q_mask = mvm_sta->tfd_queue_msk;
1612
1613 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1614 q_mask);
1615 }
1616 if (ret)
1617 return ret;
1618
1619 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1620
1621 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1622
1623 /* If there is a TXQ still marked as reserved - free it */
1624 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1625 u8 reserved_txq = mvm_sta->reserved_queue;
1626 enum iwl_mvm_queue_status *status;
1627
1628 /*
1629 * If no traffic has gone through the reserved TXQ - it
1630 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1631 * should be manually marked as free again
1632 */
1633 spin_lock_bh(&mvm->queue_info_lock);
1634 status = &mvm->queue_info[reserved_txq].status;
1635 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1636 (*status != IWL_MVM_QUEUE_FREE),
1637 "sta_id %d reserved txq %d status %d",
1638 sta_id, reserved_txq, *status)) {
1639 spin_unlock_bh(&mvm->queue_info_lock);
1640 return -EINVAL;
1641 }
1642
1643 *status = IWL_MVM_QUEUE_FREE;
1644 spin_unlock_bh(&mvm->queue_info_lock);
1645 }
1646
1647 if (vif->type == NL80211_IFTYPE_STATION &&
1648 mvmvif->ap_sta_id == sta_id) {
1649 /* if associated - we can't remove the AP STA now */
1650 if (vif->bss_conf.assoc)
1651 return ret;
1652
1653 /* unassoc - go ahead - remove the AP STA now */
1654 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1655
1656 /* clear d0i3_ap_sta_id if no longer relevant */
1657 if (mvm->d0i3_ap_sta_id == sta_id)
1658 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1659 }
1660
1661 /*
1662 * This shouldn't happen - the TDLS channel switch should be canceled
1663 * before the STA is removed.
1664 */
1665 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1666 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1667 cancel_delayed_work(&mvm->tdls_cs.dwork);
1668 }
1669
1670 /*
1671 * Make sure that the tx response code sees the station as -EBUSY and
1672 * calls the drain worker.
1673 */
1674 spin_lock_bh(&mvm_sta->lock);
1675 spin_unlock_bh(&mvm_sta->lock);
1676
1677 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1678 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1679
1680 return ret;
1681 }
1682
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)1683 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1684 struct ieee80211_vif *vif,
1685 u8 sta_id)
1686 {
1687 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1688
1689 lockdep_assert_held(&mvm->mutex);
1690
1691 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1692 return ret;
1693 }
1694
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,enum iwl_sta_type type)1695 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1696 struct iwl_mvm_int_sta *sta,
1697 u32 qmask, enum nl80211_iftype iftype,
1698 enum iwl_sta_type type)
1699 {
1700 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1701 sta->sta_id == IWL_MVM_INVALID_STA) {
1702 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1703 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1704 return -ENOSPC;
1705 }
1706
1707 sta->tfd_queue_msk = qmask;
1708 sta->type = type;
1709
1710 /* put a non-NULL value so iterating over the stations won't stop */
1711 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1712 return 0;
1713 }
1714
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)1715 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1716 {
1717 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1718 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1719 sta->sta_id = IWL_MVM_INVALID_STA;
1720 }
1721
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 * queue,u8 sta_id,u8 fifo)1722 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
1723 u8 sta_id, u8 fifo)
1724 {
1725 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1726 mvm->cfg->base_params->wd_timeout :
1727 IWL_WATCHDOG_DISABLED;
1728
1729 if (iwl_mvm_has_new_tx_api(mvm)) {
1730 int tvqm_queue =
1731 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
1732 IWL_MAX_TID_COUNT,
1733 wdg_timeout);
1734 *queue = tvqm_queue;
1735 } else {
1736 struct iwl_trans_txq_scd_cfg cfg = {
1737 .fifo = fifo,
1738 .sta_id = sta_id,
1739 .tid = IWL_MAX_TID_COUNT,
1740 .aggregate = false,
1741 .frame_limit = IWL_FRAME_LIMIT,
1742 };
1743
1744 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
1745 }
1746 }
1747
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm)1748 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1749 {
1750 int ret;
1751
1752 lockdep_assert_held(&mvm->mutex);
1753
1754 /* Allocate aux station and assign to it the aux queue */
1755 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1756 NL80211_IFTYPE_UNSPECIFIED,
1757 IWL_STA_AUX_ACTIVITY);
1758 if (ret)
1759 return ret;
1760
1761 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1762 if (!iwl_mvm_has_new_tx_api(mvm))
1763 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1764 mvm->aux_sta.sta_id,
1765 IWL_MVM_TX_FIFO_MCAST);
1766
1767 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1768 MAC_INDEX_AUX, 0);
1769 if (ret) {
1770 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1771 return ret;
1772 }
1773
1774 /*
1775 * For 22000 firmware and on we cannot add queue to a station unknown
1776 * to firmware so enable queue here - after the station was added
1777 */
1778 if (iwl_mvm_has_new_tx_api(mvm))
1779 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1780 mvm->aux_sta.sta_id,
1781 IWL_MVM_TX_FIFO_MCAST);
1782
1783 return 0;
1784 }
1785
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1786 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1787 {
1788 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1789 int ret;
1790
1791 lockdep_assert_held(&mvm->mutex);
1792
1793 /* Map snif queue to fifo - must happen before adding snif station */
1794 if (!iwl_mvm_has_new_tx_api(mvm))
1795 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1796 mvm->snif_sta.sta_id,
1797 IWL_MVM_TX_FIFO_BE);
1798
1799 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1800 mvmvif->id, 0);
1801 if (ret)
1802 return ret;
1803
1804 /*
1805 * For 22000 firmware and on we cannot add queue to a station unknown
1806 * to firmware so enable queue here - after the station was added
1807 */
1808 if (iwl_mvm_has_new_tx_api(mvm))
1809 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1810 mvm->snif_sta.sta_id,
1811 IWL_MVM_TX_FIFO_BE);
1812
1813 return 0;
1814 }
1815
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1816 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1817 {
1818 int ret;
1819
1820 lockdep_assert_held(&mvm->mutex);
1821
1822 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
1823 IWL_MAX_TID_COUNT, 0);
1824 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1825 if (ret)
1826 IWL_WARN(mvm, "Failed sending remove station\n");
1827
1828 return ret;
1829 }
1830
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)1831 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1832 {
1833 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1834 }
1835
iwl_mvm_del_aux_sta(struct iwl_mvm * mvm)1836 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1837 {
1838 lockdep_assert_held(&mvm->mutex);
1839
1840 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1841 }
1842
1843 /*
1844 * Send the add station command for the vif's broadcast station.
1845 * Assumes that the station was already allocated.
1846 *
1847 * @mvm: the mvm component
1848 * @vif: the interface to which the broadcast station is added
1849 * @bsta: the broadcast station to add.
1850 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1851 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1852 {
1853 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1854 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1855 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1856 const u8 *baddr = _baddr;
1857 int queue;
1858 int ret;
1859 unsigned int wdg_timeout =
1860 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1861 struct iwl_trans_txq_scd_cfg cfg = {
1862 .fifo = IWL_MVM_TX_FIFO_VO,
1863 .sta_id = mvmvif->bcast_sta.sta_id,
1864 .tid = IWL_MAX_TID_COUNT,
1865 .aggregate = false,
1866 .frame_limit = IWL_FRAME_LIMIT,
1867 };
1868
1869 lockdep_assert_held(&mvm->mutex);
1870
1871 if (!iwl_mvm_has_new_tx_api(mvm)) {
1872 if (vif->type == NL80211_IFTYPE_AP ||
1873 vif->type == NL80211_IFTYPE_ADHOC)
1874 queue = mvm->probe_queue;
1875 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1876 queue = mvm->p2p_dev_queue;
1877 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1878 return -EINVAL;
1879
1880 bsta->tfd_queue_msk |= BIT(queue);
1881
1882 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1883 &cfg, wdg_timeout);
1884 }
1885
1886 if (vif->type == NL80211_IFTYPE_ADHOC)
1887 baddr = vif->bss_conf.bssid;
1888
1889 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1890 return -ENOSPC;
1891
1892 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1893 mvmvif->id, mvmvif->color);
1894 if (ret)
1895 return ret;
1896
1897 /*
1898 * For 22000 firmware and on we cannot add queue to a station unknown
1899 * to firmware so enable queue here - after the station was added
1900 */
1901 if (iwl_mvm_has_new_tx_api(mvm)) {
1902 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1903 bsta->sta_id,
1904 IWL_MAX_TID_COUNT,
1905 wdg_timeout);
1906
1907 if (vif->type == NL80211_IFTYPE_AP ||
1908 vif->type == NL80211_IFTYPE_ADHOC)
1909 mvm->probe_queue = queue;
1910 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1911 mvm->p2p_dev_queue = queue;
1912 }
1913
1914 return 0;
1915 }
1916
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1917 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1918 struct ieee80211_vif *vif)
1919 {
1920 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1921 int queue;
1922
1923 lockdep_assert_held(&mvm->mutex);
1924
1925 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1926
1927 switch (vif->type) {
1928 case NL80211_IFTYPE_AP:
1929 case NL80211_IFTYPE_ADHOC:
1930 queue = mvm->probe_queue;
1931 break;
1932 case NL80211_IFTYPE_P2P_DEVICE:
1933 queue = mvm->p2p_dev_queue;
1934 break;
1935 default:
1936 WARN(1, "Can't free bcast queue on vif type %d\n",
1937 vif->type);
1938 return;
1939 }
1940
1941 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1942 if (iwl_mvm_has_new_tx_api(mvm))
1943 return;
1944
1945 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1946 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1947 }
1948
1949 /* Send the FW a request to remove the station from it's internal data
1950 * structures, but DO NOT remove the entry from the local data structures. */
iwl_mvm_send_rm_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1951 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1952 {
1953 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1954 int ret;
1955
1956 lockdep_assert_held(&mvm->mutex);
1957
1958 iwl_mvm_free_bcast_sta_queues(mvm, vif);
1959
1960 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1961 if (ret)
1962 IWL_WARN(mvm, "Failed sending remove station\n");
1963 return ret;
1964 }
1965
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1966 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1967 {
1968 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1969
1970 lockdep_assert_held(&mvm->mutex);
1971
1972 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1973 ieee80211_vif_type_p2p(vif),
1974 IWL_STA_GENERAL_PURPOSE);
1975 }
1976
1977 /* Allocate a new station entry for the broadcast station to the given vif,
1978 * and send it to the FW.
1979 * Note that each P2P mac should have its own broadcast station.
1980 *
1981 * @mvm: the mvm component
1982 * @vif: the interface to which the broadcast station is added
1983 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1984 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1985 {
1986 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1987 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1988 int ret;
1989
1990 lockdep_assert_held(&mvm->mutex);
1991
1992 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1993 if (ret)
1994 return ret;
1995
1996 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1997
1998 if (ret)
1999 iwl_mvm_dealloc_int_sta(mvm, bsta);
2000
2001 return ret;
2002 }
2003
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2004 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2005 {
2006 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2007
2008 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2009 }
2010
2011 /*
2012 * Send the FW a request to remove the station from it's internal data
2013 * structures, and in addition remove it from the local data structure.
2014 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2015 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2016 {
2017 int ret;
2018
2019 lockdep_assert_held(&mvm->mutex);
2020
2021 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2022
2023 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2024
2025 return ret;
2026 }
2027
2028 /*
2029 * Allocate a new station entry for the multicast station to the given vif,
2030 * and send it to the FW.
2031 * Note that each AP/GO mac should have its own multicast station.
2032 *
2033 * @mvm: the mvm component
2034 * @vif: the interface to which the multicast station is added
2035 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2036 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2037 {
2038 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2039 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2040 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2041 const u8 *maddr = _maddr;
2042 struct iwl_trans_txq_scd_cfg cfg = {
2043 .fifo = IWL_MVM_TX_FIFO_MCAST,
2044 .sta_id = msta->sta_id,
2045 .tid = 0,
2046 .aggregate = false,
2047 .frame_limit = IWL_FRAME_LIMIT,
2048 };
2049 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2050 int ret;
2051
2052 lockdep_assert_held(&mvm->mutex);
2053
2054 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2055 vif->type != NL80211_IFTYPE_ADHOC))
2056 return -ENOTSUPP;
2057
2058 /*
2059 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2060 * invalid, so make sure we use the queue we want.
2061 * Note that this is done here as we want to avoid making DQA
2062 * changes in mac80211 layer.
2063 */
2064 if (vif->type == NL80211_IFTYPE_ADHOC) {
2065 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2066 mvmvif->cab_queue = vif->cab_queue;
2067 }
2068
2069 /*
2070 * While in previous FWs we had to exclude cab queue from TFD queue
2071 * mask, now it is needed as any other queue.
2072 */
2073 if (!iwl_mvm_has_new_tx_api(mvm) &&
2074 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2075 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2076 &cfg, timeout);
2077 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2078 }
2079 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2080 mvmvif->id, mvmvif->color);
2081 if (ret) {
2082 iwl_mvm_dealloc_int_sta(mvm, msta);
2083 return ret;
2084 }
2085
2086 /*
2087 * Enable cab queue after the ADD_STA command is sent.
2088 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2089 * command with unknown station id, and for FW that doesn't support
2090 * station API since the cab queue is not included in the
2091 * tfd_queue_mask.
2092 */
2093 if (iwl_mvm_has_new_tx_api(mvm)) {
2094 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2095 msta->sta_id,
2096 0,
2097 timeout);
2098 mvmvif->cab_queue = queue;
2099 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2100 IWL_UCODE_TLV_API_STA_TYPE))
2101 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2102 &cfg, timeout);
2103
2104 return 0;
2105 }
2106
2107 /*
2108 * Send the FW a request to remove the station from it's internal data
2109 * structures, and in addition remove it from the local data structure.
2110 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2111 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2112 {
2113 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2114 int ret;
2115
2116 lockdep_assert_held(&mvm->mutex);
2117
2118 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2119
2120 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2121 0, 0);
2122
2123 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2124 if (ret)
2125 IWL_WARN(mvm, "Failed sending remove station\n");
2126
2127 return ret;
2128 }
2129
2130 #define IWL_MAX_RX_BA_SESSIONS 16
2131
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2132 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2133 {
2134 struct iwl_mvm_delba_notif notif = {
2135 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2136 .metadata.sync = 1,
2137 .delba.baid = baid,
2138 };
2139 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif));
2140 };
2141
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2142 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2143 struct iwl_mvm_baid_data *data)
2144 {
2145 int i;
2146
2147 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2148
2149 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2150 int j;
2151 struct iwl_mvm_reorder_buffer *reorder_buf =
2152 &data->reorder_buf[i];
2153 struct iwl_mvm_reorder_buf_entry *entries =
2154 &data->entries[i * data->entries_per_queue];
2155
2156 spin_lock_bh(&reorder_buf->lock);
2157 if (likely(!reorder_buf->num_stored)) {
2158 spin_unlock_bh(&reorder_buf->lock);
2159 continue;
2160 }
2161
2162 /*
2163 * This shouldn't happen in regular DELBA since the internal
2164 * delBA notification should trigger a release of all frames in
2165 * the reorder buffer.
2166 */
2167 WARN_ON(1);
2168
2169 for (j = 0; j < reorder_buf->buf_size; j++)
2170 __skb_queue_purge(&entries[j].e.frames);
2171 /*
2172 * Prevent timer re-arm. This prevents a very far fetched case
2173 * where we timed out on the notification. There may be prior
2174 * RX frames pending in the RX queue before the notification
2175 * that might get processed between now and the actual deletion
2176 * and we would re-arm the timer although we are deleting the
2177 * reorder buffer.
2178 */
2179 reorder_buf->removed = true;
2180 spin_unlock_bh(&reorder_buf->lock);
2181 del_timer_sync(&reorder_buf->reorder_timer);
2182 }
2183 }
2184
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2185 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2186 struct iwl_mvm_baid_data *data,
2187 u16 ssn, u16 buf_size)
2188 {
2189 int i;
2190
2191 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2192 struct iwl_mvm_reorder_buffer *reorder_buf =
2193 &data->reorder_buf[i];
2194 struct iwl_mvm_reorder_buf_entry *entries =
2195 &data->entries[i * data->entries_per_queue];
2196 int j;
2197
2198 reorder_buf->num_stored = 0;
2199 reorder_buf->head_sn = ssn;
2200 reorder_buf->buf_size = buf_size;
2201 /* rx reorder timer */
2202 timer_setup(&reorder_buf->reorder_timer,
2203 iwl_mvm_reorder_timer_expired, 0);
2204 spin_lock_init(&reorder_buf->lock);
2205 reorder_buf->mvm = mvm;
2206 reorder_buf->queue = i;
2207 reorder_buf->valid = false;
2208 for (j = 0; j < reorder_buf->buf_size; j++)
2209 __skb_queue_head_init(&entries[j].e.frames);
2210 }
2211 }
2212
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2213 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2214 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2215 {
2216 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2217 struct iwl_mvm_add_sta_cmd cmd = {};
2218 struct iwl_mvm_baid_data *baid_data = NULL;
2219 int ret;
2220 u32 status;
2221
2222 lockdep_assert_held(&mvm->mutex);
2223
2224 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2225 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2226 return -ENOSPC;
2227 }
2228
2229 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2230 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2231
2232 /* sparse doesn't like the __align() so don't check */
2233 #ifndef __CHECKER__
2234 /*
2235 * The division below will be OK if either the cache line size
2236 * can be divided by the entry size (ALIGN will round up) or if
2237 * if the entry size can be divided by the cache line size, in
2238 * which case the ALIGN() will do nothing.
2239 */
2240 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2241 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2242 #endif
2243
2244 /*
2245 * Upward align the reorder buffer size to fill an entire cache
2246 * line for each queue, to avoid sharing cache lines between
2247 * different queues.
2248 */
2249 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2250
2251 /*
2252 * Allocate here so if allocation fails we can bail out early
2253 * before starting the BA session in the firmware
2254 */
2255 baid_data = kzalloc(sizeof(*baid_data) +
2256 mvm->trans->num_rx_queues *
2257 reorder_buf_size,
2258 GFP_KERNEL);
2259 if (!baid_data)
2260 return -ENOMEM;
2261
2262 /*
2263 * This division is why we need the above BUILD_BUG_ON(),
2264 * if that doesn't hold then this will not be right.
2265 */
2266 baid_data->entries_per_queue =
2267 reorder_buf_size / sizeof(baid_data->entries[0]);
2268 }
2269
2270 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2271 cmd.sta_id = mvm_sta->sta_id;
2272 cmd.add_modify = STA_MODE_MODIFY;
2273 if (start) {
2274 cmd.add_immediate_ba_tid = (u8) tid;
2275 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2276 cmd.rx_ba_window = cpu_to_le16(buf_size);
2277 } else {
2278 cmd.remove_immediate_ba_tid = (u8) tid;
2279 }
2280 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2281 STA_MODIFY_REMOVE_BA_TID;
2282
2283 status = ADD_STA_SUCCESS;
2284 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2285 iwl_mvm_add_sta_cmd_size(mvm),
2286 &cmd, &status);
2287 if (ret)
2288 goto out_free;
2289
2290 switch (status & IWL_ADD_STA_STATUS_MASK) {
2291 case ADD_STA_SUCCESS:
2292 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2293 start ? "start" : "stopp");
2294 break;
2295 case ADD_STA_IMMEDIATE_BA_FAILURE:
2296 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2297 ret = -ENOSPC;
2298 break;
2299 default:
2300 ret = -EIO;
2301 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2302 start ? "start" : "stopp", status);
2303 break;
2304 }
2305
2306 if (ret)
2307 goto out_free;
2308
2309 if (start) {
2310 u8 baid;
2311
2312 mvm->rx_ba_sessions++;
2313
2314 if (!iwl_mvm_has_new_rx_api(mvm))
2315 return 0;
2316
2317 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2318 ret = -EINVAL;
2319 goto out_free;
2320 }
2321 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2322 IWL_ADD_STA_BAID_SHIFT);
2323 baid_data->baid = baid;
2324 baid_data->timeout = timeout;
2325 baid_data->last_rx = jiffies;
2326 baid_data->rcu_ptr = &mvm->baid_map[baid];
2327 timer_setup(&baid_data->session_timer,
2328 iwl_mvm_rx_agg_session_expired, 0);
2329 baid_data->mvm = mvm;
2330 baid_data->tid = tid;
2331 baid_data->sta_id = mvm_sta->sta_id;
2332
2333 mvm_sta->tid_to_baid[tid] = baid;
2334 if (timeout)
2335 mod_timer(&baid_data->session_timer,
2336 TU_TO_EXP_TIME(timeout * 2));
2337
2338 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2339 /*
2340 * protect the BA data with RCU to cover a case where our
2341 * internal RX sync mechanism will timeout (not that it's
2342 * supposed to happen) and we will free the session data while
2343 * RX is being processed in parallel
2344 */
2345 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2346 mvm_sta->sta_id, tid, baid);
2347 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2348 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2349 } else {
2350 u8 baid = mvm_sta->tid_to_baid[tid];
2351
2352 if (mvm->rx_ba_sessions > 0)
2353 /* check that restart flow didn't zero the counter */
2354 mvm->rx_ba_sessions--;
2355 if (!iwl_mvm_has_new_rx_api(mvm))
2356 return 0;
2357
2358 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2359 return -EINVAL;
2360
2361 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2362 if (WARN_ON(!baid_data))
2363 return -EINVAL;
2364
2365 /* synchronize all rx queues so we can safely delete */
2366 iwl_mvm_free_reorder(mvm, baid_data);
2367 del_timer_sync(&baid_data->session_timer);
2368 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2369 kfree_rcu(baid_data, rcu_head);
2370 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2371 }
2372 return 0;
2373
2374 out_free:
2375 kfree(baid_data);
2376 return ret;
2377 }
2378
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)2379 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2380 int tid, u8 queue, bool start)
2381 {
2382 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2383 struct iwl_mvm_add_sta_cmd cmd = {};
2384 int ret;
2385 u32 status;
2386
2387 lockdep_assert_held(&mvm->mutex);
2388
2389 if (start) {
2390 mvm_sta->tfd_queue_msk |= BIT(queue);
2391 mvm_sta->tid_disable_agg &= ~BIT(tid);
2392 } else {
2393 /* In DQA-mode the queue isn't removed on agg termination */
2394 mvm_sta->tid_disable_agg |= BIT(tid);
2395 }
2396
2397 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2398 cmd.sta_id = mvm_sta->sta_id;
2399 cmd.add_modify = STA_MODE_MODIFY;
2400 if (!iwl_mvm_has_new_tx_api(mvm))
2401 cmd.modify_mask = STA_MODIFY_QUEUES;
2402 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2403 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2404 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2405
2406 status = ADD_STA_SUCCESS;
2407 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2408 iwl_mvm_add_sta_cmd_size(mvm),
2409 &cmd, &status);
2410 if (ret)
2411 return ret;
2412
2413 switch (status & IWL_ADD_STA_STATUS_MASK) {
2414 case ADD_STA_SUCCESS:
2415 break;
2416 default:
2417 ret = -EIO;
2418 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2419 start ? "start" : "stopp", status);
2420 break;
2421 }
2422
2423 return ret;
2424 }
2425
2426 const u8 tid_to_mac80211_ac[] = {
2427 IEEE80211_AC_BE,
2428 IEEE80211_AC_BK,
2429 IEEE80211_AC_BK,
2430 IEEE80211_AC_BE,
2431 IEEE80211_AC_VI,
2432 IEEE80211_AC_VI,
2433 IEEE80211_AC_VO,
2434 IEEE80211_AC_VO,
2435 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2436 };
2437
2438 static const u8 tid_to_ucode_ac[] = {
2439 AC_BE,
2440 AC_BK,
2441 AC_BK,
2442 AC_BE,
2443 AC_VI,
2444 AC_VI,
2445 AC_VO,
2446 AC_VO,
2447 };
2448
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)2449 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2450 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2451 {
2452 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2453 struct iwl_mvm_tid_data *tid_data;
2454 u16 normalized_ssn;
2455 int txq_id;
2456 int ret;
2457
2458 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2459 return -EINVAL;
2460
2461 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2462 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2463 IWL_ERR(mvm,
2464 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2465 mvmsta->tid_data[tid].state);
2466 return -ENXIO;
2467 }
2468
2469 lockdep_assert_held(&mvm->mutex);
2470
2471 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2472 iwl_mvm_has_new_tx_api(mvm)) {
2473 u8 ac = tid_to_mac80211_ac[tid];
2474
2475 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2476 if (ret)
2477 return ret;
2478 }
2479
2480 spin_lock_bh(&mvmsta->lock);
2481
2482 /* possible race condition - we entered D0i3 while starting agg */
2483 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2484 spin_unlock_bh(&mvmsta->lock);
2485 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2486 return -EIO;
2487 }
2488
2489 spin_lock(&mvm->queue_info_lock);
2490
2491 /*
2492 * Note the possible cases:
2493 * 1. An enabled TXQ - TXQ needs to become agg'ed
2494 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2495 * it as reserved
2496 */
2497 txq_id = mvmsta->tid_data[tid].txq_id;
2498 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2499 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2500 IWL_MVM_DQA_MIN_DATA_QUEUE,
2501 IWL_MVM_DQA_MAX_DATA_QUEUE);
2502 if (txq_id < 0) {
2503 ret = txq_id;
2504 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2505 goto release_locks;
2506 }
2507
2508 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2509 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2510 } else if (unlikely(mvm->queue_info[txq_id].status ==
2511 IWL_MVM_QUEUE_SHARED)) {
2512 ret = -ENXIO;
2513 IWL_DEBUG_TX_QUEUES(mvm,
2514 "Can't start tid %d agg on shared queue!\n",
2515 tid);
2516 goto release_locks;
2517 }
2518
2519 spin_unlock(&mvm->queue_info_lock);
2520
2521 IWL_DEBUG_TX_QUEUES(mvm,
2522 "AGG for tid %d will be on queue #%d\n",
2523 tid, txq_id);
2524
2525 tid_data = &mvmsta->tid_data[tid];
2526 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2527 tid_data->txq_id = txq_id;
2528 *ssn = tid_data->ssn;
2529
2530 IWL_DEBUG_TX_QUEUES(mvm,
2531 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2532 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2533 tid_data->next_reclaimed);
2534
2535 /*
2536 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2537 * to align the wrap around of ssn so we compare relevant values.
2538 */
2539 normalized_ssn = tid_data->ssn;
2540 if (mvm->trans->cfg->gen2)
2541 normalized_ssn &= 0xff;
2542
2543 if (normalized_ssn == tid_data->next_reclaimed) {
2544 tid_data->state = IWL_AGG_STARTING;
2545 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2546 } else {
2547 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2548 }
2549
2550 ret = 0;
2551 goto out;
2552
2553 release_locks:
2554 spin_unlock(&mvm->queue_info_lock);
2555 out:
2556 spin_unlock_bh(&mvmsta->lock);
2557
2558 return ret;
2559 }
2560
iwl_mvm_sta_tx_agg_oper(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 buf_size,bool amsdu)2561 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2562 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2563 bool amsdu)
2564 {
2565 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2566 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2567 unsigned int wdg_timeout =
2568 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2569 int queue, ret;
2570 bool alloc_queue = true;
2571 enum iwl_mvm_queue_status queue_status;
2572 u16 ssn;
2573
2574 struct iwl_trans_txq_scd_cfg cfg = {
2575 .sta_id = mvmsta->sta_id,
2576 .tid = tid,
2577 .frame_limit = buf_size,
2578 .aggregate = true,
2579 };
2580
2581 /*
2582 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2583 * manager, so this function should never be called in this case.
2584 */
2585 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2586 return -EINVAL;
2587
2588 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2589 != IWL_MAX_TID_COUNT);
2590
2591 spin_lock_bh(&mvmsta->lock);
2592 ssn = tid_data->ssn;
2593 queue = tid_data->txq_id;
2594 tid_data->state = IWL_AGG_ON;
2595 mvmsta->agg_tids |= BIT(tid);
2596 tid_data->ssn = 0xffff;
2597 tid_data->amsdu_in_ampdu_allowed = amsdu;
2598 spin_unlock_bh(&mvmsta->lock);
2599
2600 if (iwl_mvm_has_new_tx_api(mvm)) {
2601 /*
2602 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2603 * would have failed, so if we are here there is no need to
2604 * allocate a queue.
2605 * However, if aggregation size is different than the default
2606 * size, the scheduler should be reconfigured.
2607 * We cannot do this with the new TX API, so return unsupported
2608 * for now, until it will be offloaded to firmware..
2609 * Note that if SCD default value changes - this condition
2610 * should be updated as well.
2611 */
2612 if (buf_size < IWL_FRAME_LIMIT)
2613 return -ENOTSUPP;
2614
2615 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2616 if (ret)
2617 return -EIO;
2618 goto out;
2619 }
2620
2621 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2622
2623 spin_lock_bh(&mvm->queue_info_lock);
2624 queue_status = mvm->queue_info[queue].status;
2625 spin_unlock_bh(&mvm->queue_info_lock);
2626
2627 /* Maybe there is no need to even alloc a queue... */
2628 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2629 alloc_queue = false;
2630
2631 /*
2632 * Only reconfig the SCD for the queue if the window size has
2633 * changed from current (become smaller)
2634 */
2635 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2636 /*
2637 * If reconfiguring an existing queue, it first must be
2638 * drained
2639 */
2640 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2641 BIT(queue));
2642 if (ret) {
2643 IWL_ERR(mvm,
2644 "Error draining queue before reconfig\n");
2645 return ret;
2646 }
2647
2648 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2649 mvmsta->sta_id, tid,
2650 buf_size, ssn);
2651 if (ret) {
2652 IWL_ERR(mvm,
2653 "Error reconfiguring TXQ #%d\n", queue);
2654 return ret;
2655 }
2656 }
2657
2658 if (alloc_queue)
2659 iwl_mvm_enable_txq(mvm, queue,
2660 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2661 &cfg, wdg_timeout);
2662
2663 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2664 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2665 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2666 if (ret)
2667 return -EIO;
2668 }
2669
2670 /* No need to mark as reserved */
2671 spin_lock_bh(&mvm->queue_info_lock);
2672 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2673 spin_unlock_bh(&mvm->queue_info_lock);
2674
2675 out:
2676 /*
2677 * Even though in theory the peer could have different
2678 * aggregation reorder buffer sizes for different sessions,
2679 * our ucode doesn't allow for that and has a global limit
2680 * for each station. Therefore, use the minimum of all the
2681 * aggregation sessions and our default value.
2682 */
2683 mvmsta->max_agg_bufsize =
2684 min(mvmsta->max_agg_bufsize, buf_size);
2685 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2686
2687 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2688 sta->addr, tid);
2689
2690 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
2691 }
2692
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)2693 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2694 struct iwl_mvm_sta *mvmsta,
2695 struct iwl_mvm_tid_data *tid_data)
2696 {
2697 u16 txq_id = tid_data->txq_id;
2698
2699 if (iwl_mvm_has_new_tx_api(mvm))
2700 return;
2701
2702 spin_lock_bh(&mvm->queue_info_lock);
2703 /*
2704 * The TXQ is marked as reserved only if no traffic came through yet
2705 * This means no traffic has been sent on this TID (agg'd or not), so
2706 * we no longer have use for the queue. Since it hasn't even been
2707 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2708 * free.
2709 */
2710 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
2711 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2712 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
2713 }
2714
2715 spin_unlock_bh(&mvm->queue_info_lock);
2716 }
2717
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)2718 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2719 struct ieee80211_sta *sta, u16 tid)
2720 {
2721 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2722 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2723 u16 txq_id;
2724 int err;
2725
2726 /*
2727 * If mac80211 is cleaning its state, then say that we finished since
2728 * our state has been cleared anyway.
2729 */
2730 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2731 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2732 return 0;
2733 }
2734
2735 spin_lock_bh(&mvmsta->lock);
2736
2737 txq_id = tid_data->txq_id;
2738
2739 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2740 mvmsta->sta_id, tid, txq_id, tid_data->state);
2741
2742 mvmsta->agg_tids &= ~BIT(tid);
2743
2744 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2745
2746 switch (tid_data->state) {
2747 case IWL_AGG_ON:
2748 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2749
2750 IWL_DEBUG_TX_QUEUES(mvm,
2751 "ssn = %d, next_recl = %d\n",
2752 tid_data->ssn, tid_data->next_reclaimed);
2753
2754 tid_data->ssn = 0xffff;
2755 tid_data->state = IWL_AGG_OFF;
2756 spin_unlock_bh(&mvmsta->lock);
2757
2758 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2759
2760 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2761 return 0;
2762 case IWL_AGG_STARTING:
2763 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2764 /*
2765 * The agg session has been stopped before it was set up. This
2766 * can happen when the AddBA timer times out for example.
2767 */
2768
2769 /* No barriers since we are under mutex */
2770 lockdep_assert_held(&mvm->mutex);
2771
2772 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2773 tid_data->state = IWL_AGG_OFF;
2774 err = 0;
2775 break;
2776 default:
2777 IWL_ERR(mvm,
2778 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2779 mvmsta->sta_id, tid, tid_data->state);
2780 IWL_ERR(mvm,
2781 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2782 err = -EINVAL;
2783 }
2784
2785 spin_unlock_bh(&mvmsta->lock);
2786
2787 return err;
2788 }
2789
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)2790 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2791 struct ieee80211_sta *sta, u16 tid)
2792 {
2793 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2794 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2795 u16 txq_id;
2796 enum iwl_mvm_agg_state old_state;
2797
2798 /*
2799 * First set the agg state to OFF to avoid calling
2800 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2801 */
2802 spin_lock_bh(&mvmsta->lock);
2803 txq_id = tid_data->txq_id;
2804 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2805 mvmsta->sta_id, tid, txq_id, tid_data->state);
2806 old_state = tid_data->state;
2807 tid_data->state = IWL_AGG_OFF;
2808 mvmsta->agg_tids &= ~BIT(tid);
2809 spin_unlock_bh(&mvmsta->lock);
2810
2811 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2812
2813 if (old_state >= IWL_AGG_ON) {
2814 iwl_mvm_drain_sta(mvm, mvmsta, true);
2815
2816 if (iwl_mvm_has_new_tx_api(mvm)) {
2817 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2818 BIT(tid), 0))
2819 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2820 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2821 } else {
2822 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2823 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2824 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2825 }
2826
2827 iwl_mvm_drain_sta(mvm, mvmsta, false);
2828
2829 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2830 }
2831
2832 return 0;
2833 }
2834
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)2835 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2836 {
2837 int i, max = -1, max_offs = -1;
2838
2839 lockdep_assert_held(&mvm->mutex);
2840
2841 /* Pick the unused key offset with the highest 'deleted'
2842 * counter. Every time a key is deleted, all the counters
2843 * are incremented and the one that was just deleted is
2844 * reset to zero. Thus, the highest counter is the one
2845 * that was deleted longest ago. Pick that one.
2846 */
2847 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2848 if (test_bit(i, mvm->fw_key_table))
2849 continue;
2850 if (mvm->fw_key_deleted[i] > max) {
2851 max = mvm->fw_key_deleted[i];
2852 max_offs = i;
2853 }
2854 }
2855
2856 if (max_offs < 0)
2857 return STA_KEY_IDX_INVALID;
2858
2859 return max_offs;
2860 }
2861
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2862 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2863 struct ieee80211_vif *vif,
2864 struct ieee80211_sta *sta)
2865 {
2866 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2867
2868 if (sta)
2869 return iwl_mvm_sta_from_mac80211(sta);
2870
2871 /*
2872 * The device expects GTKs for station interfaces to be
2873 * installed as GTKs for the AP station. If we have no
2874 * station ID, then use AP's station ID.
2875 */
2876 if (vif->type == NL80211_IFTYPE_STATION &&
2877 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2878 u8 sta_id = mvmvif->ap_sta_id;
2879
2880 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2881 lockdep_is_held(&mvm->mutex));
2882
2883 /*
2884 * It is possible that the 'sta' parameter is NULL,
2885 * for example when a GTK is removed - the sta_id will then
2886 * be the AP ID, and no station was passed by mac80211.
2887 */
2888 if (IS_ERR_OR_NULL(sta))
2889 return NULL;
2890
2891 return iwl_mvm_sta_from_mac80211(sta);
2892 }
2893
2894 return NULL;
2895 }
2896
iwl_mvm_send_sta_key(struct iwl_mvm * mvm,u32 sta_id,struct ieee80211_key_conf * key,bool mcast,u32 tkip_iv32,u16 * tkip_p1k,u32 cmd_flags,u8 key_offset,bool mfp)2897 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2898 u32 sta_id,
2899 struct ieee80211_key_conf *key, bool mcast,
2900 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2901 u8 key_offset, bool mfp)
2902 {
2903 union {
2904 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2905 struct iwl_mvm_add_sta_key_cmd cmd;
2906 } u = {};
2907 __le16 key_flags;
2908 int ret;
2909 u32 status;
2910 u16 keyidx;
2911 u64 pn = 0;
2912 int i, size;
2913 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2914 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2915
2916 if (sta_id == IWL_MVM_INVALID_STA)
2917 return -EINVAL;
2918
2919 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2920 STA_KEY_FLG_KEYID_MSK;
2921 key_flags = cpu_to_le16(keyidx);
2922 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2923
2924 switch (key->cipher) {
2925 case WLAN_CIPHER_SUITE_TKIP:
2926 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2927 if (new_api) {
2928 memcpy((void *)&u.cmd.tx_mic_key,
2929 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2930 IWL_MIC_KEY_SIZE);
2931
2932 memcpy((void *)&u.cmd.rx_mic_key,
2933 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2934 IWL_MIC_KEY_SIZE);
2935 pn = atomic64_read(&key->tx_pn);
2936
2937 } else {
2938 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2939 for (i = 0; i < 5; i++)
2940 u.cmd_v1.tkip_rx_ttak[i] =
2941 cpu_to_le16(tkip_p1k[i]);
2942 }
2943 memcpy(u.cmd.common.key, key->key, key->keylen);
2944 break;
2945 case WLAN_CIPHER_SUITE_CCMP:
2946 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2947 memcpy(u.cmd.common.key, key->key, key->keylen);
2948 if (new_api)
2949 pn = atomic64_read(&key->tx_pn);
2950 break;
2951 case WLAN_CIPHER_SUITE_WEP104:
2952 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2953 /* fall through */
2954 case WLAN_CIPHER_SUITE_WEP40:
2955 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2956 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2957 break;
2958 case WLAN_CIPHER_SUITE_GCMP_256:
2959 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2960 /* fall through */
2961 case WLAN_CIPHER_SUITE_GCMP:
2962 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2963 memcpy(u.cmd.common.key, key->key, key->keylen);
2964 if (new_api)
2965 pn = atomic64_read(&key->tx_pn);
2966 break;
2967 default:
2968 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2969 memcpy(u.cmd.common.key, key->key, key->keylen);
2970 }
2971
2972 if (mcast)
2973 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2974 if (mfp)
2975 key_flags |= cpu_to_le16(STA_KEY_MFP);
2976
2977 u.cmd.common.key_offset = key_offset;
2978 u.cmd.common.key_flags = key_flags;
2979 u.cmd.common.sta_id = sta_id;
2980
2981 if (new_api) {
2982 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
2983 size = sizeof(u.cmd);
2984 } else {
2985 size = sizeof(u.cmd_v1);
2986 }
2987
2988 status = ADD_STA_SUCCESS;
2989 if (cmd_flags & CMD_ASYNC)
2990 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
2991 &u.cmd);
2992 else
2993 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
2994 &u.cmd, &status);
2995
2996 switch (status) {
2997 case ADD_STA_SUCCESS:
2998 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
2999 break;
3000 default:
3001 ret = -EIO;
3002 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3003 break;
3004 }
3005
3006 return ret;
3007 }
3008
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3009 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3010 struct ieee80211_key_conf *keyconf,
3011 u8 sta_id, bool remove_key)
3012 {
3013 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3014
3015 /* verify the key details match the required command's expectations */
3016 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3017 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3018 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3019 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3020 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3021 return -EINVAL;
3022
3023 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3024 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3025 return -EINVAL;
3026
3027 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3028 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3029
3030 if (remove_key) {
3031 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3032 } else {
3033 struct ieee80211_key_seq seq;
3034 const u8 *pn;
3035
3036 switch (keyconf->cipher) {
3037 case WLAN_CIPHER_SUITE_AES_CMAC:
3038 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3039 break;
3040 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3041 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3042 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3043 break;
3044 default:
3045 return -EINVAL;
3046 }
3047
3048 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3049 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3050 igtk_cmd.ctrl_flags |=
3051 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3052 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3053 pn = seq.aes_cmac.pn;
3054 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3055 ((u64) pn[4] << 8) |
3056 ((u64) pn[3] << 16) |
3057 ((u64) pn[2] << 24) |
3058 ((u64) pn[1] << 32) |
3059 ((u64) pn[0] << 40));
3060 }
3061
3062 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3063 remove_key ? "removing" : "installing",
3064 igtk_cmd.sta_id);
3065
3066 if (!iwl_mvm_has_new_rx_api(mvm)) {
3067 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3068 .ctrl_flags = igtk_cmd.ctrl_flags,
3069 .key_id = igtk_cmd.key_id,
3070 .sta_id = igtk_cmd.sta_id,
3071 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3072 };
3073
3074 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3075 ARRAY_SIZE(igtk_cmd_v1.igtk));
3076 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3077 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3078 }
3079 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3080 sizeof(igtk_cmd), &igtk_cmd);
3081 }
3082
3083
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3084 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3085 struct ieee80211_vif *vif,
3086 struct ieee80211_sta *sta)
3087 {
3088 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3089
3090 if (sta)
3091 return sta->addr;
3092
3093 if (vif->type == NL80211_IFTYPE_STATION &&
3094 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3095 u8 sta_id = mvmvif->ap_sta_id;
3096 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3097 lockdep_is_held(&mvm->mutex));
3098 return sta->addr;
3099 }
3100
3101
3102 return NULL;
3103 }
3104
__iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset,bool mcast)3105 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3106 struct ieee80211_vif *vif,
3107 struct ieee80211_sta *sta,
3108 struct ieee80211_key_conf *keyconf,
3109 u8 key_offset,
3110 bool mcast)
3111 {
3112 int ret;
3113 const u8 *addr;
3114 struct ieee80211_key_seq seq;
3115 u16 p1k[5];
3116 u32 sta_id;
3117 bool mfp = false;
3118
3119 if (sta) {
3120 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3121
3122 sta_id = mvm_sta->sta_id;
3123 mfp = sta->mfp;
3124 } else if (vif->type == NL80211_IFTYPE_AP &&
3125 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3126 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3127
3128 sta_id = mvmvif->mcast_sta.sta_id;
3129 } else {
3130 IWL_ERR(mvm, "Failed to find station id\n");
3131 return -EINVAL;
3132 }
3133
3134 switch (keyconf->cipher) {
3135 case WLAN_CIPHER_SUITE_TKIP:
3136 if (vif->type == NL80211_IFTYPE_AP) {
3137 ret = -EINVAL;
3138 break;
3139 }
3140 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3141 /* get phase 1 key from mac80211 */
3142 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3143 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3144 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3145 seq.tkip.iv32, p1k, 0, key_offset,
3146 mfp);
3147 break;
3148 case WLAN_CIPHER_SUITE_CCMP:
3149 case WLAN_CIPHER_SUITE_WEP40:
3150 case WLAN_CIPHER_SUITE_WEP104:
3151 case WLAN_CIPHER_SUITE_GCMP:
3152 case WLAN_CIPHER_SUITE_GCMP_256:
3153 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3154 0, NULL, 0, key_offset, mfp);
3155 break;
3156 default:
3157 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3158 0, NULL, 0, key_offset, mfp);
3159 }
3160
3161 return ret;
3162 }
3163
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)3164 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3165 struct ieee80211_key_conf *keyconf,
3166 bool mcast)
3167 {
3168 union {
3169 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3170 struct iwl_mvm_add_sta_key_cmd cmd;
3171 } u = {};
3172 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3173 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3174 __le16 key_flags;
3175 int ret, size;
3176 u32 status;
3177
3178 /* This is a valid situation for GTK removal */
3179 if (sta_id == IWL_MVM_INVALID_STA)
3180 return 0;
3181
3182 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3183 STA_KEY_FLG_KEYID_MSK);
3184 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3185 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3186
3187 if (mcast)
3188 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3189
3190 /*
3191 * The fields assigned here are in the same location at the start
3192 * of the command, so we can do this union trick.
3193 */
3194 u.cmd.common.key_flags = key_flags;
3195 u.cmd.common.key_offset = keyconf->hw_key_idx;
3196 u.cmd.common.sta_id = sta_id;
3197
3198 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3199
3200 status = ADD_STA_SUCCESS;
3201 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3202 &status);
3203
3204 switch (status) {
3205 case ADD_STA_SUCCESS:
3206 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3207 break;
3208 default:
3209 ret = -EIO;
3210 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3211 break;
3212 }
3213
3214 return ret;
3215 }
3216
iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset)3217 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3218 struct ieee80211_vif *vif,
3219 struct ieee80211_sta *sta,
3220 struct ieee80211_key_conf *keyconf,
3221 u8 key_offset)
3222 {
3223 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3224 struct iwl_mvm_sta *mvm_sta;
3225 u8 sta_id = IWL_MVM_INVALID_STA;
3226 int ret;
3227 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3228
3229 lockdep_assert_held(&mvm->mutex);
3230
3231 if (vif->type != NL80211_IFTYPE_AP ||
3232 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3233 /* Get the station id from the mvm local station table */
3234 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3235 if (!mvm_sta) {
3236 IWL_ERR(mvm, "Failed to find station\n");
3237 return -EINVAL;
3238 }
3239 sta_id = mvm_sta->sta_id;
3240
3241 /*
3242 * It is possible that the 'sta' parameter is NULL, and thus
3243 * there is a need to retrieve the sta from the local station
3244 * table.
3245 */
3246 if (!sta) {
3247 sta = rcu_dereference_protected(
3248 mvm->fw_id_to_mac_id[sta_id],
3249 lockdep_is_held(&mvm->mutex));
3250 if (IS_ERR_OR_NULL(sta)) {
3251 IWL_ERR(mvm, "Invalid station id\n");
3252 return -EINVAL;
3253 }
3254 }
3255
3256 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3257 return -EINVAL;
3258 } else {
3259 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3260
3261 sta_id = mvmvif->mcast_sta.sta_id;
3262 }
3263
3264 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3265 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3266 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3267 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3268 goto end;
3269 }
3270
3271 /* If the key_offset is not pre-assigned, we need to find a
3272 * new offset to use. In normal cases, the offset is not
3273 * pre-assigned, but during HW_RESTART we want to reuse the
3274 * same indices, so we pass them when this function is called.
3275 *
3276 * In D3 entry, we need to hardcoded the indices (because the
3277 * firmware hardcodes the PTK offset to 0). In this case, we
3278 * need to make sure we don't overwrite the hw_key_idx in the
3279 * keyconf structure, because otherwise we cannot configure
3280 * the original ones back when resuming.
3281 */
3282 if (key_offset == STA_KEY_IDX_INVALID) {
3283 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3284 if (key_offset == STA_KEY_IDX_INVALID)
3285 return -ENOSPC;
3286 keyconf->hw_key_idx = key_offset;
3287 }
3288
3289 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3290 if (ret)
3291 goto end;
3292
3293 /*
3294 * For WEP, the same key is used for multicast and unicast. Upload it
3295 * again, using the same key offset, and now pointing the other one
3296 * to the same key slot (offset).
3297 * If this fails, remove the original as well.
3298 */
3299 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3300 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3301 sta) {
3302 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3303 key_offset, !mcast);
3304 if (ret) {
3305 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3306 goto end;
3307 }
3308 }
3309
3310 __set_bit(key_offset, mvm->fw_key_table);
3311
3312 end:
3313 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3314 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3315 sta ? sta->addr : zero_addr, ret);
3316 return ret;
3317 }
3318
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3319 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3320 struct ieee80211_vif *vif,
3321 struct ieee80211_sta *sta,
3322 struct ieee80211_key_conf *keyconf)
3323 {
3324 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3325 struct iwl_mvm_sta *mvm_sta;
3326 u8 sta_id = IWL_MVM_INVALID_STA;
3327 int ret, i;
3328
3329 lockdep_assert_held(&mvm->mutex);
3330
3331 /* Get the station from the mvm local station table */
3332 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3333 if (mvm_sta)
3334 sta_id = mvm_sta->sta_id;
3335 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3336 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3337
3338
3339 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3340 keyconf->keyidx, sta_id);
3341
3342 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3343 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3344 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3345 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3346
3347 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3348 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3349 keyconf->hw_key_idx);
3350 return -ENOENT;
3351 }
3352
3353 /* track which key was deleted last */
3354 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3355 if (mvm->fw_key_deleted[i] < U8_MAX)
3356 mvm->fw_key_deleted[i]++;
3357 }
3358 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3359
3360 if (sta && !mvm_sta) {
3361 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3362 return 0;
3363 }
3364
3365 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3366 if (ret)
3367 return ret;
3368
3369 /* delete WEP key twice to get rid of (now useless) offset */
3370 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3371 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3372 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3373
3374 return ret;
3375 }
3376
iwl_mvm_update_tkip_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)3377 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3378 struct ieee80211_vif *vif,
3379 struct ieee80211_key_conf *keyconf,
3380 struct ieee80211_sta *sta, u32 iv32,
3381 u16 *phase1key)
3382 {
3383 struct iwl_mvm_sta *mvm_sta;
3384 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3385 bool mfp = sta ? sta->mfp : false;
3386
3387 rcu_read_lock();
3388
3389 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3390 if (WARN_ON_ONCE(!mvm_sta))
3391 goto unlock;
3392 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3393 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3394 mfp);
3395
3396 unlock:
3397 rcu_read_unlock();
3398 }
3399
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)3400 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3401 struct ieee80211_sta *sta)
3402 {
3403 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3404 struct iwl_mvm_add_sta_cmd cmd = {
3405 .add_modify = STA_MODE_MODIFY,
3406 .sta_id = mvmsta->sta_id,
3407 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3408 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3409 };
3410 int ret;
3411
3412 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3413 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3414 if (ret)
3415 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3416 }
3417
iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum ieee80211_frame_release_type reason,u16 cnt,u16 tids,bool more_data,bool single_sta_queue)3418 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3419 struct ieee80211_sta *sta,
3420 enum ieee80211_frame_release_type reason,
3421 u16 cnt, u16 tids, bool more_data,
3422 bool single_sta_queue)
3423 {
3424 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3425 struct iwl_mvm_add_sta_cmd cmd = {
3426 .add_modify = STA_MODE_MODIFY,
3427 .sta_id = mvmsta->sta_id,
3428 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3429 .sleep_tx_count = cpu_to_le16(cnt),
3430 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3431 };
3432 int tid, ret;
3433 unsigned long _tids = tids;
3434
3435 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3436 * Note that this field is reserved and unused by firmware not
3437 * supporting GO uAPSD, so it's safe to always do this.
3438 */
3439 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3440 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3441
3442 /* If we're releasing frames from aggregation or dqa queues then check
3443 * if all the queues that we're releasing frames from, combined, have:
3444 * - more frames than the service period, in which case more_data
3445 * needs to be set
3446 * - fewer than 'cnt' frames, in which case we need to adjust the
3447 * firmware command (but do that unconditionally)
3448 */
3449 if (single_sta_queue) {
3450 int remaining = cnt;
3451 int sleep_tx_count;
3452
3453 spin_lock_bh(&mvmsta->lock);
3454 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3455 struct iwl_mvm_tid_data *tid_data;
3456 u16 n_queued;
3457
3458 tid_data = &mvmsta->tid_data[tid];
3459
3460 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3461 if (n_queued > remaining) {
3462 more_data = true;
3463 remaining = 0;
3464 break;
3465 }
3466 remaining -= n_queued;
3467 }
3468 sleep_tx_count = cnt - remaining;
3469 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3470 mvmsta->sleep_tx_count = sleep_tx_count;
3471 spin_unlock_bh(&mvmsta->lock);
3472
3473 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3474 if (WARN_ON(cnt - remaining == 0)) {
3475 ieee80211_sta_eosp(sta);
3476 return;
3477 }
3478 }
3479
3480 /* Note: this is ignored by firmware not supporting GO uAPSD */
3481 if (more_data)
3482 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3483
3484 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3485 mvmsta->next_status_eosp = true;
3486 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3487 } else {
3488 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3489 }
3490
3491 /* block the Tx queues until the FW updated the sleep Tx count */
3492 iwl_trans_block_txq_ptrs(mvm->trans, true);
3493
3494 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3495 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3496 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3497 if (ret)
3498 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3499 }
3500
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3501 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3502 struct iwl_rx_cmd_buffer *rxb)
3503 {
3504 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3505 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3506 struct ieee80211_sta *sta;
3507 u32 sta_id = le32_to_cpu(notif->sta_id);
3508
3509 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3510 return;
3511
3512 rcu_read_lock();
3513 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3514 if (!IS_ERR_OR_NULL(sta))
3515 ieee80211_sta_eosp(sta);
3516 rcu_read_unlock();
3517 }
3518
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)3519 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3520 struct iwl_mvm_sta *mvmsta, bool disable)
3521 {
3522 struct iwl_mvm_add_sta_cmd cmd = {
3523 .add_modify = STA_MODE_MODIFY,
3524 .sta_id = mvmsta->sta_id,
3525 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3526 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3527 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3528 };
3529 int ret;
3530
3531 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3532 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3533 if (ret)
3534 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3535 }
3536
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)3537 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3538 struct ieee80211_sta *sta,
3539 bool disable)
3540 {
3541 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3542
3543 spin_lock_bh(&mvm_sta->lock);
3544
3545 if (mvm_sta->disable_tx == disable) {
3546 spin_unlock_bh(&mvm_sta->lock);
3547 return;
3548 }
3549
3550 mvm_sta->disable_tx = disable;
3551
3552 /* Tell mac80211 to start/stop queuing tx for this station */
3553 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3554
3555 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3556
3557 spin_unlock_bh(&mvm_sta->lock);
3558 }
3559
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)3560 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3561 struct iwl_mvm_vif *mvmvif,
3562 struct iwl_mvm_int_sta *sta,
3563 bool disable)
3564 {
3565 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3566 struct iwl_mvm_add_sta_cmd cmd = {
3567 .add_modify = STA_MODE_MODIFY,
3568 .sta_id = sta->sta_id,
3569 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3570 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3571 .mac_id_n_color = cpu_to_le32(id),
3572 };
3573 int ret;
3574
3575 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3576 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3577 if (ret)
3578 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3579 }
3580
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)3581 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3582 struct iwl_mvm_vif *mvmvif,
3583 bool disable)
3584 {
3585 struct ieee80211_sta *sta;
3586 struct iwl_mvm_sta *mvm_sta;
3587 int i;
3588
3589 lockdep_assert_held(&mvm->mutex);
3590
3591 /* Block/unblock all the stations of the given mvmvif */
3592 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3593 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3594 lockdep_is_held(&mvm->mutex));
3595 if (IS_ERR_OR_NULL(sta))
3596 continue;
3597
3598 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3599 if (mvm_sta->mac_id_n_color !=
3600 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3601 continue;
3602
3603 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3604 }
3605
3606 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3607 return;
3608
3609 /* Need to block/unblock also multicast station */
3610 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3611 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3612 &mvmvif->mcast_sta, disable);
3613
3614 /*
3615 * Only unblock the broadcast station (FW blocks it for immediate
3616 * quiet, not the driver)
3617 */
3618 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3619 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3620 &mvmvif->bcast_sta, disable);
3621 }
3622
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)3623 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3624 {
3625 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3626 struct iwl_mvm_sta *mvmsta;
3627
3628 rcu_read_lock();
3629
3630 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3631
3632 if (!WARN_ON(!mvmsta))
3633 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3634
3635 rcu_read_unlock();
3636 }
3637
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)3638 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3639 {
3640 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3641
3642 /*
3643 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3644 * to align the wrap around of ssn so we compare relevant values.
3645 */
3646 if (mvm->trans->cfg->gen2)
3647 sn &= 0xff;
3648
3649 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3650 }
3651
