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 /*
444 * The TX path may have been using this TXQ_ID from the tid_data,
445 * so make sure it's no longer running so that we can safely reuse
446 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
447 * above, but nothing guarantees we've stopped using them. Thus,
448 * without this, we could get to iwl_mvm_disable_txq() and remove
449 * the queue while still sending frames to it.
450 */
451 synchronize_net();
452
453 return disable_agg_tids;
454 }
455
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,bool same_sta)456 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
457 bool same_sta)
458 {
459 struct iwl_mvm_sta *mvmsta;
460 u8 txq_curr_ac, sta_id, tid;
461 unsigned long disable_agg_tids = 0;
462 int ret;
463
464 lockdep_assert_held(&mvm->mutex);
465
466 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
467 return -EINVAL;
468
469 spin_lock_bh(&mvm->queue_info_lock);
470 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
471 sta_id = mvm->queue_info[queue].ra_sta_id;
472 tid = mvm->queue_info[queue].txq_tid;
473 spin_unlock_bh(&mvm->queue_info_lock);
474
475 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
476 if (WARN_ON(!mvmsta))
477 return -EINVAL;
478
479 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
480 /* Disable the queue */
481 if (disable_agg_tids)
482 iwl_mvm_invalidate_sta_queue(mvm, queue,
483 disable_agg_tids, false);
484
485 ret = iwl_mvm_disable_txq(mvm, queue,
486 mvmsta->vif->hw_queue[txq_curr_ac],
487 tid, 0);
488 if (ret) {
489 /* Re-mark the inactive queue as inactive */
490 spin_lock_bh(&mvm->queue_info_lock);
491 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
492 spin_unlock_bh(&mvm->queue_info_lock);
493 IWL_ERR(mvm,
494 "Failed to free inactive queue %d (ret=%d)\n",
495 queue, ret);
496
497 return ret;
498 }
499
500 /* If TXQ is allocated to another STA, update removal in FW */
501 if (!same_sta)
502 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
503
504 return 0;
505 }
506
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)507 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
508 unsigned long tfd_queue_mask, u8 ac)
509 {
510 int queue = 0;
511 u8 ac_to_queue[IEEE80211_NUM_ACS];
512 int i;
513
514 lockdep_assert_held(&mvm->queue_info_lock);
515 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
516 return -EINVAL;
517
518 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
519
520 /* See what ACs the existing queues for this STA have */
521 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
522 /* Only DATA queues can be shared */
523 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
524 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
525 continue;
526
527 /* Don't try and take queues being reconfigured */
528 if (mvm->queue_info[queue].status ==
529 IWL_MVM_QUEUE_RECONFIGURING)
530 continue;
531
532 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
533 }
534
535 /*
536 * The queue to share is chosen only from DATA queues as follows (in
537 * descending priority):
538 * 1. An AC_BE queue
539 * 2. Same AC queue
540 * 3. Highest AC queue that is lower than new AC
541 * 4. Any existing AC (there always is at least 1 DATA queue)
542 */
543
544 /* Priority 1: An AC_BE queue */
545 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
546 queue = ac_to_queue[IEEE80211_AC_BE];
547 /* Priority 2: Same AC queue */
548 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
549 queue = ac_to_queue[ac];
550 /* Priority 3a: If new AC is VO and VI exists - use VI */
551 else if (ac == IEEE80211_AC_VO &&
552 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
553 queue = ac_to_queue[IEEE80211_AC_VI];
554 /* Priority 3b: No BE so only AC less than the new one is BK */
555 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
556 queue = ac_to_queue[IEEE80211_AC_BK];
557 /* Priority 4a: No BE nor BK - use VI if exists */
558 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
559 queue = ac_to_queue[IEEE80211_AC_VI];
560 /* Priority 4b: No BE, BK nor VI - use VO if exists */
561 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
562 queue = ac_to_queue[IEEE80211_AC_VO];
563
564 /* Make sure queue found (or not) is legal */
565 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
566 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
567 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
568 IWL_ERR(mvm, "No DATA queues available to share\n");
569 return -ENOSPC;
570 }
571
572 /* Make sure the queue isn't in the middle of being reconfigured */
573 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
574 IWL_ERR(mvm,
575 "TXQ %d is in the middle of re-config - try again\n",
576 queue);
577 return -EBUSY;
578 }
579
580 return queue;
581 }
582
583 /*
584 * If a given queue has a higher AC than the TID stream that is being compared
585 * to, the queue needs to be redirected to the lower AC. This function does that
586 * in such a case, otherwise - if no redirection required - it does nothing,
587 * unless the %force param is true.
588 */
iwl_mvm_scd_queue_redirect(struct iwl_mvm * mvm,int queue,int tid,int ac,int ssn,unsigned int wdg_timeout,bool force)589 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
590 int ac, int ssn, unsigned int wdg_timeout,
591 bool force)
592 {
593 struct iwl_scd_txq_cfg_cmd cmd = {
594 .scd_queue = queue,
595 .action = SCD_CFG_DISABLE_QUEUE,
596 };
597 bool shared_queue;
598 unsigned long mq;
599 int ret;
600
601 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
602 return -EINVAL;
603
604 /*
605 * If the AC is lower than current one - FIFO needs to be redirected to
606 * the lowest one of the streams in the queue. Check if this is needed
607 * here.
608 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
609 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
610 * we need to check if the numerical value of X is LARGER than of Y.
611 */
612 spin_lock_bh(&mvm->queue_info_lock);
613 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
614 spin_unlock_bh(&mvm->queue_info_lock);
615
616 IWL_DEBUG_TX_QUEUES(mvm,
617 "No redirection needed on TXQ #%d\n",
618 queue);
619 return 0;
620 }
621
622 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
623 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
624 cmd.tid = mvm->queue_info[queue].txq_tid;
625 mq = mvm->hw_queue_to_mac80211[queue];
626 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
627 spin_unlock_bh(&mvm->queue_info_lock);
628
629 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
630 queue, iwl_mvm_ac_to_tx_fifo[ac]);
631
632 /* Stop MAC queues and wait for this queue to empty */
633 iwl_mvm_stop_mac_queues(mvm, mq);
634 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
635 if (ret) {
636 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
637 queue);
638 ret = -EIO;
639 goto out;
640 }
641
642 /* Before redirecting the queue we need to de-activate it */
643 iwl_trans_txq_disable(mvm->trans, queue, false);
644 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
645 if (ret)
646 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
647 ret);
648
649 /* Make sure the SCD wrptr is correctly set before reconfiguring */
650 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
651
652 /* Update the TID "owner" of the queue */
653 spin_lock_bh(&mvm->queue_info_lock);
654 mvm->queue_info[queue].txq_tid = tid;
655 spin_unlock_bh(&mvm->queue_info_lock);
656
657 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
658
659 /* Redirect to lower AC */
660 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
661 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
662
663 /* Update AC marking of the queue */
664 spin_lock_bh(&mvm->queue_info_lock);
665 mvm->queue_info[queue].mac80211_ac = ac;
666 spin_unlock_bh(&mvm->queue_info_lock);
667
668 /*
669 * Mark queue as shared in transport if shared
670 * Note this has to be done after queue enablement because enablement
671 * can also set this value, and there is no indication there to shared
672 * queues
673 */
674 if (shared_queue)
675 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
676
677 out:
678 /* Continue using the MAC queues */
679 iwl_mvm_start_mac_queues(mvm, mq);
680
681 return ret;
682 }
683
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)684 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
685 struct ieee80211_sta *sta, u8 ac,
686 int tid)
687 {
688 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
689 unsigned int wdg_timeout =
690 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
691 u8 mac_queue = mvmsta->vif->hw_queue[ac];
692 int queue = -1;
693
694 lockdep_assert_held(&mvm->mutex);
695
696 IWL_DEBUG_TX_QUEUES(mvm,
697 "Allocating queue for sta %d on tid %d\n",
698 mvmsta->sta_id, tid);
699 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
700 wdg_timeout);
701 if (queue < 0)
702 return queue;
703
704 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
705
706 spin_lock_bh(&mvmsta->lock);
707 mvmsta->tid_data[tid].txq_id = queue;
708 mvmsta->tid_data[tid].is_tid_active = true;
709 spin_unlock_bh(&mvmsta->lock);
710
711 return 0;
712 }
713
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid,struct ieee80211_hdr * hdr)714 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
715 struct ieee80211_sta *sta, u8 ac, int tid,
716 struct ieee80211_hdr *hdr)
717 {
718 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
719 struct iwl_trans_txq_scd_cfg cfg = {
720 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
721 .sta_id = mvmsta->sta_id,
722 .tid = tid,
723 .frame_limit = IWL_FRAME_LIMIT,
724 };
725 unsigned int wdg_timeout =
726 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
727 u8 mac_queue = mvmsta->vif->hw_queue[ac];
728 int queue = -1;
729 bool using_inactive_queue = false, same_sta = false;
730 unsigned long disable_agg_tids = 0;
731 enum iwl_mvm_agg_state queue_state;
732 bool shared_queue = false, inc_ssn;
733 int ssn;
734 unsigned long tfd_queue_mask;
735 int ret;
736
737 lockdep_assert_held(&mvm->mutex);
738
739 if (iwl_mvm_has_new_tx_api(mvm))
740 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
741
742 spin_lock_bh(&mvmsta->lock);
743 tfd_queue_mask = mvmsta->tfd_queue_msk;
744 spin_unlock_bh(&mvmsta->lock);
745
746 spin_lock_bh(&mvm->queue_info_lock);
747
748 /*
749 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
750 * exists
751 */
752 if (!ieee80211_is_data_qos(hdr->frame_control) ||
753 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
754 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
755 IWL_MVM_DQA_MIN_MGMT_QUEUE,
756 IWL_MVM_DQA_MAX_MGMT_QUEUE);
757 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
758 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
759 queue);
760
761 /* If no such queue is found, we'll use a DATA queue instead */
762 }
763
764 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
765 (mvm->queue_info[mvmsta->reserved_queue].status ==
766 IWL_MVM_QUEUE_RESERVED ||
767 mvm->queue_info[mvmsta->reserved_queue].status ==
768 IWL_MVM_QUEUE_INACTIVE)) {
769 queue = mvmsta->reserved_queue;
770 mvm->queue_info[queue].reserved = true;
771 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
772 }
773
774 if (queue < 0)
775 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
776 IWL_MVM_DQA_MIN_DATA_QUEUE,
777 IWL_MVM_DQA_MAX_DATA_QUEUE);
778
779 /*
780 * Check if this queue is already allocated but inactive.
781 * In such a case, we'll need to first free this queue before enabling
782 * it again, so we'll mark it as reserved to make sure no new traffic
783 * arrives on it
784 */
785 if (queue > 0 &&
786 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
787 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
788 using_inactive_queue = true;
789 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
790 IWL_DEBUG_TX_QUEUES(mvm,
791 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
792 queue, mvmsta->sta_id, tid);
793 }
794
795 /* No free queue - we'll have to share */
796 if (queue <= 0) {
797 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
798 if (queue > 0) {
799 shared_queue = true;
800 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
801 }
802 }
803
804 /*
805 * Mark TXQ as ready, even though it hasn't been fully configured yet,
806 * to make sure no one else takes it.
807 * This will allow avoiding re-acquiring the lock at the end of the
808 * configuration. On error we'll mark it back as free.
809 */
810 if ((queue > 0) && !shared_queue)
811 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
812
813 spin_unlock_bh(&mvm->queue_info_lock);
814
815 /* This shouldn't happen - out of queues */
816 if (WARN_ON(queue <= 0)) {
817 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
818 tid, cfg.sta_id);
819 return queue;
820 }
821
822 /*
823 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
824 * but for configuring the SCD to send A-MPDUs we need to mark the queue
825 * as aggregatable.
826 * Mark all DATA queues as allowing to be aggregated at some point
827 */
828 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
829 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
830
831 /*
832 * If this queue was previously inactive (idle) - we need to free it
833 * first
834 */
835 if (using_inactive_queue) {
836 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
837 if (ret)
838 return ret;
839 }
840
841 IWL_DEBUG_TX_QUEUES(mvm,
842 "Allocating %squeue #%d to sta %d on tid %d\n",
843 shared_queue ? "shared " : "", queue,
844 mvmsta->sta_id, tid);
845
846 if (shared_queue) {
847 /* Disable any open aggs on this queue */
848 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
849
850 if (disable_agg_tids) {
851 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
852 queue);
853 iwl_mvm_invalidate_sta_queue(mvm, queue,
854 disable_agg_tids, false);
855 }
856 }
857
858 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
859 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
860 ssn, &cfg, wdg_timeout);
861 if (inc_ssn) {
862 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
863 le16_add_cpu(&hdr->seq_ctrl, 0x10);
864 }
865
866 /*
867 * Mark queue as shared in transport if shared
868 * Note this has to be done after queue enablement because enablement
869 * can also set this value, and there is no indication there to shared
870 * queues
871 */
872 if (shared_queue)
873 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
874
875 spin_lock_bh(&mvmsta->lock);
876 /*
877 * This looks racy, but it is not. We have only one packet for
878 * this ra/tid in our Tx path since we stop the Qdisc when we
879 * need to allocate a new TFD queue.
880 */
881 if (inc_ssn)
882 mvmsta->tid_data[tid].seq_number += 0x10;
883 mvmsta->tid_data[tid].txq_id = queue;
884 mvmsta->tid_data[tid].is_tid_active = true;
885 mvmsta->tfd_queue_msk |= BIT(queue);
886 queue_state = mvmsta->tid_data[tid].state;
887
888 if (mvmsta->reserved_queue == queue)
889 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
890 spin_unlock_bh(&mvmsta->lock);
891
892 if (!shared_queue) {
893 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
894 if (ret)
895 goto out_err;
896
897 /* If we need to re-enable aggregations... */
898 if (queue_state == IWL_AGG_ON) {
899 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
900 if (ret)
901 goto out_err;
902 }
903 } else {
904 /* Redirect queue, if needed */
905 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
906 wdg_timeout, false);
907 if (ret)
908 goto out_err;
909 }
910
911 return 0;
912
913 out_err:
914 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
915
916 return ret;
917 }
918
iwl_mvm_change_queue_owner(struct iwl_mvm * mvm,int queue)919 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
920 {
921 struct iwl_scd_txq_cfg_cmd cmd = {
922 .scd_queue = queue,
923 .action = SCD_CFG_UPDATE_QUEUE_TID,
924 };
925 int tid;
926 unsigned long tid_bitmap;
927 int ret;
928
929 lockdep_assert_held(&mvm->mutex);
930
931 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
932 return;
933
934 spin_lock_bh(&mvm->queue_info_lock);
935 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
936 spin_unlock_bh(&mvm->queue_info_lock);
937
938 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
939 return;
940
941 /* Find any TID for queue */
942 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
943 cmd.tid = tid;
944 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
945
946 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
947 if (ret) {
948 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
949 queue, ret);
950 return;
951 }
952
953 spin_lock_bh(&mvm->queue_info_lock);
954 mvm->queue_info[queue].txq_tid = tid;
955 spin_unlock_bh(&mvm->queue_info_lock);
956 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
957 queue, tid);
958 }
959
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)960 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
961 {
962 struct ieee80211_sta *sta;
963 struct iwl_mvm_sta *mvmsta;
964 u8 sta_id;
965 int tid = -1;
966 unsigned long tid_bitmap;
967 unsigned int wdg_timeout;
968 int ssn;
969 int ret = true;
970
971 /* queue sharing is disabled on new TX path */
972 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
973 return;
974
975 lockdep_assert_held(&mvm->mutex);
976
977 spin_lock_bh(&mvm->queue_info_lock);
978 sta_id = mvm->queue_info[queue].ra_sta_id;
979 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
980 spin_unlock_bh(&mvm->queue_info_lock);
981
982 /* Find TID for queue, and make sure it is the only one on the queue */
983 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
984 if (tid_bitmap != BIT(tid)) {
985 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
986 queue, tid_bitmap);
987 return;
988 }
989
990 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
991 tid);
992
993 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
994 lockdep_is_held(&mvm->mutex));
995
996 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
997 return;
998
999 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1000 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1001
1002 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1003
1004 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1005 tid_to_mac80211_ac[tid], ssn,
1006 wdg_timeout, true);
1007 if (ret) {
1008 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1009 return;
1010 }
1011
1012 /* If aggs should be turned back on - do it */
1013 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1014 struct iwl_mvm_add_sta_cmd cmd = {0};
1015
1016 mvmsta->tid_disable_agg &= ~BIT(tid);
1017
1018 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1019 cmd.sta_id = mvmsta->sta_id;
1020 cmd.add_modify = STA_MODE_MODIFY;
1021 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1022 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1023 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1024
1025 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1026 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1027 if (!ret) {
1028 IWL_DEBUG_TX_QUEUES(mvm,
1029 "TXQ #%d is now aggregated again\n",
1030 queue);
1031
1032 /* Mark queue intenally as aggregating again */
1033 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1034 }
1035 }
1036
1037 spin_lock_bh(&mvm->queue_info_lock);
1038 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1039 spin_unlock_bh(&mvm->queue_info_lock);
1040 }
1041
iwl_mvm_tid_to_ac_queue(int tid)1042 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1043 {
1044 if (tid == IWL_MAX_TID_COUNT)
1045 return IEEE80211_AC_VO; /* MGMT */
1046
1047 return tid_to_mac80211_ac[tid];
1048 }
1049
iwl_mvm_tx_deferred_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid)1050 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1051 struct ieee80211_sta *sta, int tid)
1052 {
1053 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1054 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1055 struct sk_buff *skb;
1056 struct ieee80211_hdr *hdr;
1057 struct sk_buff_head deferred_tx;
1058 u8 mac_queue;
1059 bool no_queue = false; /* Marks if there is a problem with the queue */
1060 u8 ac;
1061
1062 lockdep_assert_held(&mvm->mutex);
1063
1064 skb = skb_peek(&tid_data->deferred_tx_frames);
1065 if (!skb)
1066 return;
1067 hdr = (void *)skb->data;
1068
1069 ac = iwl_mvm_tid_to_ac_queue(tid);
1070 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1071
1072 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1073 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1074 IWL_ERR(mvm,
1075 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1076 mvmsta->sta_id, tid);
1077
1078 /*
1079 * Mark queue as problematic so later the deferred traffic is
1080 * freed, as we can do nothing with it
1081 */
1082 no_queue = true;
1083 }
1084
1085 __skb_queue_head_init(&deferred_tx);
1086
1087 /* Disable bottom-halves when entering TX path */
1088 local_bh_disable();
1089 spin_lock(&mvmsta->lock);
1090 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1091 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1092 spin_unlock(&mvmsta->lock);
1093
1094 while ((skb = __skb_dequeue(&deferred_tx)))
1095 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1096 ieee80211_free_txskb(mvm->hw, skb);
1097 local_bh_enable();
1098
1099 /* Wake queue */
1100 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1101 }
1102
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1103 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1104 {
1105 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1106 add_stream_wk);
1107 struct ieee80211_sta *sta;
1108 struct iwl_mvm_sta *mvmsta;
1109 unsigned long deferred_tid_traffic;
1110 int queue, sta_id, tid;
1111
1112 /* Check inactivity of queues */
1113 iwl_mvm_inactivity_check(mvm);
1114
1115 mutex_lock(&mvm->mutex);
1116
1117 /* No queue reconfiguration in TVQM mode */
1118 if (iwl_mvm_has_new_tx_api(mvm))
1119 goto alloc_queues;
1120
1121 /* Reconfigure queues requiring reconfiguation */
1122 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1123 bool reconfig;
1124 bool change_owner;
1125
1126 spin_lock_bh(&mvm->queue_info_lock);
1127 reconfig = (mvm->queue_info[queue].status ==
1128 IWL_MVM_QUEUE_RECONFIGURING);
1129
1130 /*
1131 * We need to take into account a situation in which a TXQ was
1132 * allocated to TID x, and then turned shared by adding TIDs y
1133 * and z. If TID x becomes inactive and is removed from the TXQ,
1134 * ownership must be given to one of the remaining TIDs.
1135 * This is mainly because if TID x continues - a new queue can't
1136 * be allocated for it as long as it is an owner of another TXQ.
1137 */
1138 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1139 BIT(mvm->queue_info[queue].txq_tid)) &&
1140 (mvm->queue_info[queue].status ==
1141 IWL_MVM_QUEUE_SHARED);
1142 spin_unlock_bh(&mvm->queue_info_lock);
1143
1144 if (reconfig)
1145 iwl_mvm_unshare_queue(mvm, queue);
1146 else if (change_owner)
1147 iwl_mvm_change_queue_owner(mvm, queue);
1148 }
1149
1150 alloc_queues:
1151 /* Go over all stations with deferred traffic */
1152 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1153 IWL_MVM_STATION_COUNT) {
1154 clear_bit(sta_id, mvm->sta_deferred_frames);
1155 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1156 lockdep_is_held(&mvm->mutex));
1157 if (IS_ERR_OR_NULL(sta))
1158 continue;
1159
1160 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1161 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1162
1163 for_each_set_bit(tid, &deferred_tid_traffic,
1164 IWL_MAX_TID_COUNT + 1)
1165 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1166 }
1167
1168 mutex_unlock(&mvm->mutex);
1169 }
1170
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1171 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1172 struct ieee80211_sta *sta,
1173 enum nl80211_iftype vif_type)
1174 {
1175 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1176 int queue;
1177 bool using_inactive_queue = false, same_sta = false;
1178
1179 /* queue reserving is disabled on new TX path */
1180 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1181 return 0;
1182
1183 /*
1184 * Check for inactive queues, so we don't reach a situation where we
1185 * can't add a STA due to a shortage in queues that doesn't really exist
1186 */
1187 iwl_mvm_inactivity_check(mvm);
1188
1189 spin_lock_bh(&mvm->queue_info_lock);
1190
1191 /* Make sure we have free resources for this STA */
1192 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1193 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1194 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1195 IWL_MVM_QUEUE_FREE))
1196 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1197 else
1198 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1199 IWL_MVM_DQA_MIN_DATA_QUEUE,
1200 IWL_MVM_DQA_MAX_DATA_QUEUE);
1201 if (queue < 0) {
1202 spin_unlock_bh(&mvm->queue_info_lock);
1203 IWL_ERR(mvm, "No available queues for new station\n");
1204 return -ENOSPC;
1205 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1206 /*
1207 * If this queue is already allocated but inactive we'll need to
1208 * first free this queue before enabling it again, we'll mark
1209 * it as reserved to make sure no new traffic arrives on it
1210 */
1211 using_inactive_queue = true;
1212 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1213 }
1214 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1215
1216 spin_unlock_bh(&mvm->queue_info_lock);
1217
1218 mvmsta->reserved_queue = queue;
1219
1220 if (using_inactive_queue)
1221 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1222
1223 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1224 queue, mvmsta->sta_id);
1225
1226 return 0;
1227 }
1228
1229 /*
1230 * In DQA mode, after a HW restart the queues should be allocated as before, in
1231 * order to avoid race conditions when there are shared queues. This function
1232 * does the re-mapping and queue allocation.
1233 *
1234 * Note that re-enabling aggregations isn't done in this function.
1235 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1236 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1237 struct iwl_mvm_sta *mvm_sta)
1238 {
1239 unsigned int wdg_timeout =
1240 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1241 int i;
1242 struct iwl_trans_txq_scd_cfg cfg = {
1243 .sta_id = mvm_sta->sta_id,
1244 .frame_limit = IWL_FRAME_LIMIT,
1245 };
1246
1247 /* Make sure reserved queue is still marked as such (if allocated) */
1248 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1249 mvm->queue_info[mvm_sta->reserved_queue].status =
1250 IWL_MVM_QUEUE_RESERVED;
1251
1252 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1253 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1254 int txq_id = tid_data->txq_id;
1255 int ac;
1256 u8 mac_queue;
1257
1258 if (txq_id == IWL_MVM_INVALID_QUEUE)
1259 continue;
1260
1261 skb_queue_head_init(&tid_data->deferred_tx_frames);
1262
1263 ac = tid_to_mac80211_ac[i];
1264 mac_queue = mvm_sta->vif->hw_queue[ac];
1265
1266 if (iwl_mvm_has_new_tx_api(mvm)) {
1267 IWL_DEBUG_TX_QUEUES(mvm,
1268 "Re-mapping sta %d tid %d\n",
1269 mvm_sta->sta_id, i);
1270 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1271 mvm_sta->sta_id,
1272 i, wdg_timeout);
1273 tid_data->txq_id = txq_id;
1274
1275 /*
1276 * Since we don't set the seq number after reset, and HW
1277 * sets it now, FW reset will cause the seq num to start
1278 * at 0 again, so driver will need to update it
1279 * internally as well, so it keeps in sync with real val
1280 */
1281 tid_data->seq_number = 0;
1282 } else {
1283 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1284
1285 cfg.tid = i;
1286 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1287 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1288 txq_id ==
1289 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1290
1291 IWL_DEBUG_TX_QUEUES(mvm,
1292 "Re-mapping sta %d tid %d to queue %d\n",
1293 mvm_sta->sta_id, i, txq_id);
1294
1295 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1296 wdg_timeout);
1297 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1298 }
1299 }
1300 }
1301
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1302 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1303 struct iwl_mvm_int_sta *sta,
1304 const u8 *addr,
1305 u16 mac_id, u16 color)
1306 {
1307 struct iwl_mvm_add_sta_cmd cmd;
1308 int ret;
1309 u32 status = ADD_STA_SUCCESS;
1310
1311 lockdep_assert_held(&mvm->mutex);
1312
1313 memset(&cmd, 0, sizeof(cmd));
1314 cmd.sta_id = sta->sta_id;
1315 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1316 color));
1317 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1318 cmd.station_type = sta->type;
1319
1320 if (!iwl_mvm_has_new_tx_api(mvm))
1321 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1322 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1323
1324 if (addr)
1325 memcpy(cmd.addr, addr, ETH_ALEN);
1326
1327 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1328 iwl_mvm_add_sta_cmd_size(mvm),
1329 &cmd, &status);
1330 if (ret)
1331 return ret;
1332
1333 switch (status & IWL_ADD_STA_STATUS_MASK) {
1334 case ADD_STA_SUCCESS:
1335 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1336 return 0;
1337 default:
1338 ret = -EIO;
1339 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1340 status);
1341 break;
1342 }
1343 return ret;
1344 }
1345
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1346 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1347 struct ieee80211_vif *vif,
1348 struct ieee80211_sta *sta)
1349 {
1350 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1351 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1352 struct iwl_mvm_rxq_dup_data *dup_data;
1353 int i, ret, sta_id;
1354 bool sta_update = false;
1355 unsigned int sta_flags = 0;
1356
1357 lockdep_assert_held(&mvm->mutex);
1358
1359 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1360 sta_id = iwl_mvm_find_free_sta_id(mvm,
1361 ieee80211_vif_type_p2p(vif));
1362 else
1363 sta_id = mvm_sta->sta_id;
1364
1365 if (sta_id == IWL_MVM_INVALID_STA)
1366 return -ENOSPC;
1367
1368 spin_lock_init(&mvm_sta->lock);
1369
1370 /* if this is a HW restart re-alloc existing queues */
1371 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1372 struct iwl_mvm_int_sta tmp_sta = {
1373 .sta_id = sta_id,
1374 .type = mvm_sta->sta_type,
1375 };
1376
1377 /*
1378 * First add an empty station since allocating
1379 * a queue requires a valid station
1380 */
1381 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1382 mvmvif->id, mvmvif->color);
1383 if (ret)
1384 goto err;
1385
1386 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1387 sta_update = true;
1388 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1389 goto update_fw;
1390 }
1391
1392 mvm_sta->sta_id = sta_id;
1393 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1394 mvmvif->color);
1395 mvm_sta->vif = vif;
1396 if (!mvm->trans->cfg->gen2)
1397 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1398 else
1399 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1400 mvm_sta->tx_protection = 0;
1401 mvm_sta->tt_tx_protection = false;
1402 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1403
1404 /* HW restart, don't assume the memory has been zeroed */
1405 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1406 mvm_sta->tfd_queue_msk = 0;
1407
1408 /* for HW restart - reset everything but the sequence number */
1409 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1410 u16 seq = mvm_sta->tid_data[i].seq_number;
1411 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1412 mvm_sta->tid_data[i].seq_number = seq;
1413
1414 /*
1415 * Mark all queues for this STA as unallocated and defer TX
1416 * frames until the queue is allocated
1417 */
1418 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1419 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1420 }
1421 mvm_sta->deferred_traffic_tid_map = 0;
1422 mvm_sta->agg_tids = 0;
1423
1424 if (iwl_mvm_has_new_rx_api(mvm) &&
1425 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1426 int q;
1427
1428 dup_data = kcalloc(mvm->trans->num_rx_queues,
1429 sizeof(*dup_data), GFP_KERNEL);
1430 if (!dup_data)
1431 return -ENOMEM;
1432 /*
1433 * Initialize all the last_seq values to 0xffff which can never
1434 * compare equal to the frame's seq_ctrl in the check in
1435 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1436 * number and fragmented packets don't reach that function.
1437 *
1438 * This thus allows receiving a packet with seqno 0 and the
1439 * retry bit set as the very first packet on a new TID.
1440 */
1441 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1442 memset(dup_data[q].last_seq, 0xff,
1443 sizeof(dup_data[q].last_seq));
1444 mvm_sta->dup_data = dup_data;
1445 }
1446
1447 if (!iwl_mvm_has_new_tx_api(mvm)) {
1448 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1449 ieee80211_vif_type_p2p(vif));
1450 if (ret)
1451 goto err;
1452 }
1453
1454 /*
1455 * if rs is registered with mac80211, then "add station" will be handled
1456 * via the corresponding ops, otherwise need to notify rate scaling here
1457 */
1458 if (iwl_mvm_has_tlc_offload(mvm))
1459 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1460
1461 update_fw:
1462 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1463 if (ret)
1464 goto err;
1465
1466 if (vif->type == NL80211_IFTYPE_STATION) {
1467 if (!sta->tdls) {
1468 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1469 mvmvif->ap_sta_id = sta_id;
1470 } else {
1471 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1472 }
1473 }
1474
1475 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1476
1477 return 0;
1478
1479 err:
1480 return ret;
1481 }
1482
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1483 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1484 bool drain)
1485 {
1486 struct iwl_mvm_add_sta_cmd cmd = {};
1487 int ret;
1488 u32 status;
1489
1490 lockdep_assert_held(&mvm->mutex);
1491
1492 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1493 cmd.sta_id = mvmsta->sta_id;
1494 cmd.add_modify = STA_MODE_MODIFY;
1495 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1496 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1497
1498 status = ADD_STA_SUCCESS;
1499 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1500 iwl_mvm_add_sta_cmd_size(mvm),
1501 &cmd, &status);
1502 if (ret)
1503 return ret;
1504
1505 switch (status & IWL_ADD_STA_STATUS_MASK) {
1506 case ADD_STA_SUCCESS:
1507 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1508 mvmsta->sta_id);
1509 break;
1510 default:
1511 ret = -EIO;
1512 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1513 mvmsta->sta_id);
1514 break;
1515 }
1516
1517 return ret;
1518 }
1519
1520 /*
1521 * Remove a station from the FW table. Before sending the command to remove
1522 * the station validate that the station is indeed known to the driver (sanity
1523 * only).
1524 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1525 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1526 {
1527 struct ieee80211_sta *sta;
1528 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1529 .sta_id = sta_id,
1530 };
1531 int ret;
1532
1533 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1534 lockdep_is_held(&mvm->mutex));
1535
1536 /* Note: internal stations are marked as error values */
1537 if (!sta) {
1538 IWL_ERR(mvm, "Invalid station id\n");
1539 return -EINVAL;
1540 }
1541
1542 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1543 sizeof(rm_sta_cmd), &rm_sta_cmd);
1544 if (ret) {
1545 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1546 return ret;
1547 }
1548
1549 return 0;
1550 }
1551
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_sta * mvm_sta)1552 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1553 struct ieee80211_vif *vif,
1554 struct iwl_mvm_sta *mvm_sta)
1555 {
1556 int ac;
1557 int i;
1558
1559 lockdep_assert_held(&mvm->mutex);
1560
1561 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1562 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1563 continue;
1564
1565 ac = iwl_mvm_tid_to_ac_queue(i);
1566 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1567 vif->hw_queue[ac], i, 0);
1568 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1569 }
1570 }
1571
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1572 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1573 struct iwl_mvm_sta *mvm_sta)
1574 {
1575 int i;
1576
1577 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1578 u16 txq_id;
1579 int ret;
1580
1581 spin_lock_bh(&mvm_sta->lock);
1582 txq_id = mvm_sta->tid_data[i].txq_id;
1583 spin_unlock_bh(&mvm_sta->lock);
1584
1585 if (txq_id == IWL_MVM_INVALID_QUEUE)
1586 continue;
1587
1588 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1589 if (ret)
1590 return ret;
1591 }
1592
1593 return 0;
1594 }
1595
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1596 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1597 struct ieee80211_vif *vif,
1598 struct ieee80211_sta *sta)
1599 {
1600 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1601 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1602 u8 sta_id = mvm_sta->sta_id;
1603 int ret;
1604
1605 lockdep_assert_held(&mvm->mutex);
1606
1607 if (iwl_mvm_has_new_rx_api(mvm))
1608 kfree(mvm_sta->dup_data);
1609
1610 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1611 if (ret)
1612 return ret;
1613
1614 /* flush its queues here since we are freeing mvm_sta */
1615 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1616 if (ret)
1617 return ret;
1618 if (iwl_mvm_has_new_tx_api(mvm)) {
1619 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1620 } else {
1621 u32 q_mask = mvm_sta->tfd_queue_msk;
1622
1623 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1624 q_mask);
1625 }
1626 if (ret)
1627 return ret;
1628
1629 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1630
1631 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1632
1633 /* If there is a TXQ still marked as reserved - free it */
1634 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1635 u8 reserved_txq = mvm_sta->reserved_queue;
1636 enum iwl_mvm_queue_status *status;
1637
1638 /*
1639 * If no traffic has gone through the reserved TXQ - it
1640 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1641 * should be manually marked as free again
1642 */
1643 spin_lock_bh(&mvm->queue_info_lock);
1644 status = &mvm->queue_info[reserved_txq].status;
1645 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1646 (*status != IWL_MVM_QUEUE_FREE),
1647 "sta_id %d reserved txq %d status %d",
1648 sta_id, reserved_txq, *status)) {
1649 spin_unlock_bh(&mvm->queue_info_lock);
1650 return -EINVAL;
1651 }
1652
1653 *status = IWL_MVM_QUEUE_FREE;
1654 spin_unlock_bh(&mvm->queue_info_lock);
1655 }
1656
1657 if (vif->type == NL80211_IFTYPE_STATION &&
1658 mvmvif->ap_sta_id == sta_id) {
1659 /* if associated - we can't remove the AP STA now */
1660 if (vif->bss_conf.assoc)
1661 return ret;
1662
1663 /* unassoc - go ahead - remove the AP STA now */
1664 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1665
1666 /* clear d0i3_ap_sta_id if no longer relevant */
1667 if (mvm->d0i3_ap_sta_id == sta_id)
1668 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1669 }
1670
1671 /*
1672 * This shouldn't happen - the TDLS channel switch should be canceled
1673 * before the STA is removed.
1674 */
1675 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1676 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1677 cancel_delayed_work(&mvm->tdls_cs.dwork);
1678 }
1679
1680 /*
1681 * Make sure that the tx response code sees the station as -EBUSY and
1682 * calls the drain worker.
1683 */
1684 spin_lock_bh(&mvm_sta->lock);
1685 spin_unlock_bh(&mvm_sta->lock);
1686
1687 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1688 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1689
1690 return ret;
1691 }
1692
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)1693 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1694 struct ieee80211_vif *vif,
1695 u8 sta_id)
1696 {
1697 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1698
1699 lockdep_assert_held(&mvm->mutex);
1700
1701 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1702 return ret;
1703 }
1704
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)1705 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1706 struct iwl_mvm_int_sta *sta,
1707 u32 qmask, enum nl80211_iftype iftype,
1708 enum iwl_sta_type type)
1709 {
1710 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1711 sta->sta_id == IWL_MVM_INVALID_STA) {
1712 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1713 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1714 return -ENOSPC;
1715 }
1716
1717 sta->tfd_queue_msk = qmask;
1718 sta->type = type;
1719
1720 /* put a non-NULL value so iterating over the stations won't stop */
1721 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1722 return 0;
1723 }
1724
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)1725 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1726 {
1727 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1728 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1729 sta->sta_id = IWL_MVM_INVALID_STA;
1730 }
1731
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 * queue,u8 sta_id,u8 fifo)1732 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 *queue,
1733 u8 sta_id, u8 fifo)
1734 {
1735 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1736 mvm->cfg->base_params->wd_timeout :
1737 IWL_WATCHDOG_DISABLED;
1738
1739 if (iwl_mvm_has_new_tx_api(mvm)) {
1740 int tvqm_queue =
1741 iwl_mvm_tvqm_enable_txq(mvm, *queue, sta_id,
1742 IWL_MAX_TID_COUNT,
1743 wdg_timeout);
1744 *queue = tvqm_queue;
1745 } else {
1746 struct iwl_trans_txq_scd_cfg cfg = {
1747 .fifo = fifo,
1748 .sta_id = sta_id,
1749 .tid = IWL_MAX_TID_COUNT,
1750 .aggregate = false,
1751 .frame_limit = IWL_FRAME_LIMIT,
1752 };
1753
1754 iwl_mvm_enable_txq(mvm, *queue, *queue, 0, &cfg, wdg_timeout);
1755 }
1756 }
1757
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm)1758 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1759 {
1760 int ret;
1761
1762 lockdep_assert_held(&mvm->mutex);
1763
1764 /* Allocate aux station and assign to it the aux queue */
1765 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1766 NL80211_IFTYPE_UNSPECIFIED,
1767 IWL_STA_AUX_ACTIVITY);
1768 if (ret)
1769 return ret;
1770
1771 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1772 if (!iwl_mvm_has_new_tx_api(mvm))
1773 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1774 mvm->aux_sta.sta_id,
1775 IWL_MVM_TX_FIFO_MCAST);
1776
1777 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1778 MAC_INDEX_AUX, 0);
1779 if (ret) {
1780 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1781 return ret;
1782 }
1783
1784 /*
1785 * For 22000 firmware and on we cannot add queue to a station unknown
1786 * to firmware so enable queue here - after the station was added
1787 */
1788 if (iwl_mvm_has_new_tx_api(mvm))
1789 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->aux_queue,
1790 mvm->aux_sta.sta_id,
1791 IWL_MVM_TX_FIFO_MCAST);
1792
1793 return 0;
1794 }
1795
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1796 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1797 {
1798 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1799 int ret;
1800
1801 lockdep_assert_held(&mvm->mutex);
1802
1803 /* Map snif queue to fifo - must happen before adding snif station */
1804 if (!iwl_mvm_has_new_tx_api(mvm))
1805 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1806 mvm->snif_sta.sta_id,
1807 IWL_MVM_TX_FIFO_BE);
1808
1809 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1810 mvmvif->id, 0);
1811 if (ret)
1812 return ret;
1813
1814 /*
1815 * For 22000 firmware and on we cannot add queue to a station unknown
1816 * to firmware so enable queue here - after the station was added
1817 */
1818 if (iwl_mvm_has_new_tx_api(mvm))
1819 iwl_mvm_enable_aux_snif_queue(mvm, &mvm->snif_queue,
1820 mvm->snif_sta.sta_id,
1821 IWL_MVM_TX_FIFO_BE);
1822
1823 return 0;
1824 }
1825
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1826 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1827 {
1828 int ret;
1829
1830 lockdep_assert_held(&mvm->mutex);
1831
1832 iwl_mvm_disable_txq(mvm, mvm->snif_queue, mvm->snif_queue,
1833 IWL_MAX_TID_COUNT, 0);
1834 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1835 if (ret)
1836 IWL_WARN(mvm, "Failed sending remove station\n");
1837
1838 return ret;
1839 }
1840
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)1841 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1842 {
1843 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1844 }
1845
iwl_mvm_del_aux_sta(struct iwl_mvm * mvm)1846 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1847 {
1848 lockdep_assert_held(&mvm->mutex);
1849
1850 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1851 }
1852
1853 /*
1854 * Send the add station command for the vif's broadcast station.
1855 * Assumes that the station was already allocated.
1856 *
1857 * @mvm: the mvm component
1858 * @vif: the interface to which the broadcast station is added
1859 * @bsta: the broadcast station to add.
1860 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1861 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1862 {
1863 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1864 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1865 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1866 const u8 *baddr = _baddr;
1867 int queue;
1868 int ret;
1869 unsigned int wdg_timeout =
1870 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1871 struct iwl_trans_txq_scd_cfg cfg = {
1872 .fifo = IWL_MVM_TX_FIFO_VO,
1873 .sta_id = mvmvif->bcast_sta.sta_id,
1874 .tid = IWL_MAX_TID_COUNT,
1875 .aggregate = false,
1876 .frame_limit = IWL_FRAME_LIMIT,
1877 };
1878
1879 lockdep_assert_held(&mvm->mutex);
1880
1881 if (!iwl_mvm_has_new_tx_api(mvm)) {
1882 if (vif->type == NL80211_IFTYPE_AP ||
1883 vif->type == NL80211_IFTYPE_ADHOC)
1884 queue = mvm->probe_queue;
1885 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1886 queue = mvm->p2p_dev_queue;
1887 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
1888 return -EINVAL;
1889
1890 bsta->tfd_queue_msk |= BIT(queue);
1891
1892 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
1893 &cfg, wdg_timeout);
1894 }
1895
1896 if (vif->type == NL80211_IFTYPE_ADHOC)
1897 baddr = vif->bss_conf.bssid;
1898
1899 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
1900 return -ENOSPC;
1901
1902 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1903 mvmvif->id, mvmvif->color);
1904 if (ret)
1905 return ret;
1906
1907 /*
1908 * For 22000 firmware and on we cannot add queue to a station unknown
1909 * to firmware so enable queue here - after the station was added
1910 */
1911 if (iwl_mvm_has_new_tx_api(mvm)) {
1912 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
1913 bsta->sta_id,
1914 IWL_MAX_TID_COUNT,
1915 wdg_timeout);
1916
1917 if (vif->type == NL80211_IFTYPE_AP ||
1918 vif->type == NL80211_IFTYPE_ADHOC)
1919 mvm->probe_queue = queue;
1920 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1921 mvm->p2p_dev_queue = queue;
1922 }
1923
1924 return 0;
1925 }
1926
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1927 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
1928 struct ieee80211_vif *vif)
1929 {
1930 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1931 int queue;
1932
1933 lockdep_assert_held(&mvm->mutex);
1934
1935 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
1936
1937 switch (vif->type) {
1938 case NL80211_IFTYPE_AP:
1939 case NL80211_IFTYPE_ADHOC:
1940 queue = mvm->probe_queue;
1941 break;
1942 case NL80211_IFTYPE_P2P_DEVICE:
1943 queue = mvm->p2p_dev_queue;
1944 break;
1945 default:
1946 WARN(1, "Can't free bcast queue on vif type %d\n",
1947 vif->type);
1948 return;
1949 }
1950
1951 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
1952 if (iwl_mvm_has_new_tx_api(mvm))
1953 return;
1954
1955 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
1956 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
1957 }
1958
1959 /* Send the FW a request to remove the station from it's internal data
1960 * 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)1961 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1962 {
1963 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1964 int ret;
1965
1966 lockdep_assert_held(&mvm->mutex);
1967
1968 iwl_mvm_free_bcast_sta_queues(mvm, vif);
1969
1970 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1971 if (ret)
1972 IWL_WARN(mvm, "Failed sending remove station\n");
1973 return ret;
1974 }
1975
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1976 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1977 {
1978 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1979
1980 lockdep_assert_held(&mvm->mutex);
1981
1982 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
1983 ieee80211_vif_type_p2p(vif),
1984 IWL_STA_GENERAL_PURPOSE);
1985 }
1986
1987 /* Allocate a new station entry for the broadcast station to the given vif,
1988 * and send it to the FW.
1989 * Note that each P2P mac should have its own broadcast station.
1990 *
1991 * @mvm: the mvm component
1992 * @vif: the interface to which the broadcast station is added
1993 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)1994 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1995 {
1996 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1997 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1998 int ret;
1999
2000 lockdep_assert_held(&mvm->mutex);
2001
2002 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2003 if (ret)
2004 return ret;
2005
2006 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2007
2008 if (ret)
2009 iwl_mvm_dealloc_int_sta(mvm, bsta);
2010
2011 return ret;
2012 }
2013
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2014 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2015 {
2016 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2017
2018 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2019 }
2020
2021 /*
2022 * Send the FW a request to remove the station from it's internal data
2023 * structures, and in addition remove it from the local data structure.
2024 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2025 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2026 {
2027 int ret;
2028
2029 lockdep_assert_held(&mvm->mutex);
2030
2031 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2032
2033 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2034
2035 return ret;
2036 }
2037
2038 /*
2039 * Allocate a new station entry for the multicast station to the given vif,
2040 * and send it to the FW.
2041 * Note that each AP/GO mac should have its own multicast station.
2042 *
2043 * @mvm: the mvm component
2044 * @vif: the interface to which the multicast station is added
2045 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2046 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2047 {
2048 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2049 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2050 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2051 const u8 *maddr = _maddr;
2052 struct iwl_trans_txq_scd_cfg cfg = {
2053 .fifo = IWL_MVM_TX_FIFO_MCAST,
2054 .sta_id = msta->sta_id,
2055 .tid = 0,
2056 .aggregate = false,
2057 .frame_limit = IWL_FRAME_LIMIT,
2058 };
2059 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2060 int ret;
2061
2062 lockdep_assert_held(&mvm->mutex);
2063
2064 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2065 vif->type != NL80211_IFTYPE_ADHOC))
2066 return -ENOTSUPP;
2067
2068 /*
2069 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2070 * invalid, so make sure we use the queue we want.
2071 * Note that this is done here as we want to avoid making DQA
2072 * changes in mac80211 layer.
2073 */
2074 if (vif->type == NL80211_IFTYPE_ADHOC) {
2075 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2076 mvmvif->cab_queue = vif->cab_queue;
2077 }
2078
2079 /*
2080 * While in previous FWs we had to exclude cab queue from TFD queue
2081 * mask, now it is needed as any other queue.
2082 */
2083 if (!iwl_mvm_has_new_tx_api(mvm) &&
2084 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2085 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2086 &cfg, timeout);
2087 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2088 }
2089 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2090 mvmvif->id, mvmvif->color);
2091 if (ret) {
2092 iwl_mvm_dealloc_int_sta(mvm, msta);
2093 return ret;
2094 }
2095
2096 /*
2097 * Enable cab queue after the ADD_STA command is sent.
2098 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2099 * command with unknown station id, and for FW that doesn't support
2100 * station API since the cab queue is not included in the
2101 * tfd_queue_mask.
2102 */
2103 if (iwl_mvm_has_new_tx_api(mvm)) {
2104 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2105 msta->sta_id,
2106 0,
2107 timeout);
2108 mvmvif->cab_queue = queue;
2109 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2110 IWL_UCODE_TLV_API_STA_TYPE))
2111 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2112 &cfg, timeout);
2113
2114 return 0;
2115 }
2116
2117 /*
2118 * Send the FW a request to remove the station from it's internal data
2119 * structures, and in addition remove it from the local data structure.
2120 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2121 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2122 {
2123 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2124 int ret;
2125
2126 lockdep_assert_held(&mvm->mutex);
2127
2128 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2129
2130 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2131 0, 0);
2132
2133 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2134 if (ret)
2135 IWL_WARN(mvm, "Failed sending remove station\n");
2136
2137 return ret;
2138 }
2139
2140 #define IWL_MAX_RX_BA_SESSIONS 16
2141
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2142 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2143 {
2144 struct iwl_mvm_delba_notif notif = {
2145 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2146 .metadata.sync = 1,
2147 .delba.baid = baid,
2148 };
2149 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif));
2150 };
2151
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2152 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2153 struct iwl_mvm_baid_data *data)
2154 {
2155 int i;
2156
2157 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2158
2159 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2160 int j;
2161 struct iwl_mvm_reorder_buffer *reorder_buf =
2162 &data->reorder_buf[i];
2163 struct iwl_mvm_reorder_buf_entry *entries =
2164 &data->entries[i * data->entries_per_queue];
2165
2166 spin_lock_bh(&reorder_buf->lock);
2167 if (likely(!reorder_buf->num_stored)) {
2168 spin_unlock_bh(&reorder_buf->lock);
2169 continue;
2170 }
2171
2172 /*
2173 * This shouldn't happen in regular DELBA since the internal
2174 * delBA notification should trigger a release of all frames in
2175 * the reorder buffer.
2176 */
2177 WARN_ON(1);
2178
2179 for (j = 0; j < reorder_buf->buf_size; j++)
2180 __skb_queue_purge(&entries[j].e.frames);
2181 /*
2182 * Prevent timer re-arm. This prevents a very far fetched case
2183 * where we timed out on the notification. There may be prior
2184 * RX frames pending in the RX queue before the notification
2185 * that might get processed between now and the actual deletion
2186 * and we would re-arm the timer although we are deleting the
2187 * reorder buffer.
2188 */
2189 reorder_buf->removed = true;
2190 spin_unlock_bh(&reorder_buf->lock);
2191 del_timer_sync(&reorder_buf->reorder_timer);
2192 }
2193 }
2194
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2195 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2196 struct iwl_mvm_baid_data *data,
2197 u16 ssn, u16 buf_size)
2198 {
2199 int i;
2200
2201 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2202 struct iwl_mvm_reorder_buffer *reorder_buf =
2203 &data->reorder_buf[i];
2204 struct iwl_mvm_reorder_buf_entry *entries =
2205 &data->entries[i * data->entries_per_queue];
2206 int j;
2207
2208 reorder_buf->num_stored = 0;
2209 reorder_buf->head_sn = ssn;
2210 reorder_buf->buf_size = buf_size;
2211 /* rx reorder timer */
2212 timer_setup(&reorder_buf->reorder_timer,
2213 iwl_mvm_reorder_timer_expired, 0);
2214 spin_lock_init(&reorder_buf->lock);
2215 reorder_buf->mvm = mvm;
2216 reorder_buf->queue = i;
2217 reorder_buf->valid = false;
2218 for (j = 0; j < reorder_buf->buf_size; j++)
2219 __skb_queue_head_init(&entries[j].e.frames);
2220 }
2221 }
2222
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2223 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2224 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2225 {
2226 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2227 struct iwl_mvm_add_sta_cmd cmd = {};
2228 struct iwl_mvm_baid_data *baid_data = NULL;
2229 int ret;
2230 u32 status;
2231
2232 lockdep_assert_held(&mvm->mutex);
2233
2234 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2235 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2236 return -ENOSPC;
2237 }
2238
2239 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2240 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2241
2242 /* sparse doesn't like the __align() so don't check */
2243 #ifndef __CHECKER__
2244 /*
2245 * The division below will be OK if either the cache line size
2246 * can be divided by the entry size (ALIGN will round up) or if
2247 * if the entry size can be divided by the cache line size, in
2248 * which case the ALIGN() will do nothing.
2249 */
2250 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2251 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2252 #endif
2253
2254 /*
2255 * Upward align the reorder buffer size to fill an entire cache
2256 * line for each queue, to avoid sharing cache lines between
2257 * different queues.
2258 */
2259 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2260
2261 /*
2262 * Allocate here so if allocation fails we can bail out early
2263 * before starting the BA session in the firmware
2264 */
2265 baid_data = kzalloc(sizeof(*baid_data) +
2266 mvm->trans->num_rx_queues *
2267 reorder_buf_size,
2268 GFP_KERNEL);
2269 if (!baid_data)
2270 return -ENOMEM;
2271
2272 /*
2273 * This division is why we need the above BUILD_BUG_ON(),
2274 * if that doesn't hold then this will not be right.
2275 */
2276 baid_data->entries_per_queue =
2277 reorder_buf_size / sizeof(baid_data->entries[0]);
2278 }
2279
2280 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2281 cmd.sta_id = mvm_sta->sta_id;
2282 cmd.add_modify = STA_MODE_MODIFY;
2283 if (start) {
2284 cmd.add_immediate_ba_tid = (u8) tid;
2285 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2286 cmd.rx_ba_window = cpu_to_le16(buf_size);
2287 } else {
2288 cmd.remove_immediate_ba_tid = (u8) tid;
2289 }
2290 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2291 STA_MODIFY_REMOVE_BA_TID;
2292
2293 status = ADD_STA_SUCCESS;
2294 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2295 iwl_mvm_add_sta_cmd_size(mvm),
2296 &cmd, &status);
2297 if (ret)
2298 goto out_free;
2299
2300 switch (status & IWL_ADD_STA_STATUS_MASK) {
2301 case ADD_STA_SUCCESS:
2302 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2303 start ? "start" : "stopp");
2304 break;
2305 case ADD_STA_IMMEDIATE_BA_FAILURE:
2306 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2307 ret = -ENOSPC;
2308 break;
2309 default:
2310 ret = -EIO;
2311 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2312 start ? "start" : "stopp", status);
2313 break;
2314 }
2315
2316 if (ret)
2317 goto out_free;
2318
2319 if (start) {
2320 u8 baid;
2321
2322 mvm->rx_ba_sessions++;
2323
2324 if (!iwl_mvm_has_new_rx_api(mvm))
2325 return 0;
2326
2327 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2328 ret = -EINVAL;
2329 goto out_free;
2330 }
2331 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2332 IWL_ADD_STA_BAID_SHIFT);
2333 baid_data->baid = baid;
2334 baid_data->timeout = timeout;
2335 baid_data->last_rx = jiffies;
2336 baid_data->rcu_ptr = &mvm->baid_map[baid];
2337 timer_setup(&baid_data->session_timer,
2338 iwl_mvm_rx_agg_session_expired, 0);
2339 baid_data->mvm = mvm;
2340 baid_data->tid = tid;
2341 baid_data->sta_id = mvm_sta->sta_id;
2342
2343 mvm_sta->tid_to_baid[tid] = baid;
2344 if (timeout)
2345 mod_timer(&baid_data->session_timer,
2346 TU_TO_EXP_TIME(timeout * 2));
2347
2348 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2349 /*
2350 * protect the BA data with RCU to cover a case where our
2351 * internal RX sync mechanism will timeout (not that it's
2352 * supposed to happen) and we will free the session data while
2353 * RX is being processed in parallel
2354 */
2355 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2356 mvm_sta->sta_id, tid, baid);
2357 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2358 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2359 } else {
2360 u8 baid = mvm_sta->tid_to_baid[tid];
2361
2362 if (mvm->rx_ba_sessions > 0)
2363 /* check that restart flow didn't zero the counter */
2364 mvm->rx_ba_sessions--;
2365 if (!iwl_mvm_has_new_rx_api(mvm))
2366 return 0;
2367
2368 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2369 return -EINVAL;
2370
2371 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2372 if (WARN_ON(!baid_data))
2373 return -EINVAL;
2374
2375 /* synchronize all rx queues so we can safely delete */
2376 iwl_mvm_free_reorder(mvm, baid_data);
2377 del_timer_sync(&baid_data->session_timer);
2378 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2379 kfree_rcu(baid_data, rcu_head);
2380 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2381 }
2382 return 0;
2383
2384 out_free:
2385 kfree(baid_data);
2386 return ret;
2387 }
2388
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)2389 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2390 int tid, u8 queue, bool start)
2391 {
2392 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2393 struct iwl_mvm_add_sta_cmd cmd = {};
2394 int ret;
2395 u32 status;
2396
2397 lockdep_assert_held(&mvm->mutex);
2398
2399 if (start) {
2400 mvm_sta->tfd_queue_msk |= BIT(queue);
2401 mvm_sta->tid_disable_agg &= ~BIT(tid);
2402 } else {
2403 /* In DQA-mode the queue isn't removed on agg termination */
2404 mvm_sta->tid_disable_agg |= BIT(tid);
2405 }
2406
2407 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2408 cmd.sta_id = mvm_sta->sta_id;
2409 cmd.add_modify = STA_MODE_MODIFY;
2410 if (!iwl_mvm_has_new_tx_api(mvm))
2411 cmd.modify_mask = STA_MODIFY_QUEUES;
2412 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2413 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2414 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2415
2416 status = ADD_STA_SUCCESS;
2417 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2418 iwl_mvm_add_sta_cmd_size(mvm),
2419 &cmd, &status);
2420 if (ret)
2421 return ret;
2422
2423 switch (status & IWL_ADD_STA_STATUS_MASK) {
2424 case ADD_STA_SUCCESS:
2425 break;
2426 default:
2427 ret = -EIO;
2428 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2429 start ? "start" : "stopp", status);
2430 break;
2431 }
2432
2433 return ret;
2434 }
2435
2436 const u8 tid_to_mac80211_ac[] = {
2437 IEEE80211_AC_BE,
2438 IEEE80211_AC_BK,
2439 IEEE80211_AC_BK,
2440 IEEE80211_AC_BE,
2441 IEEE80211_AC_VI,
2442 IEEE80211_AC_VI,
2443 IEEE80211_AC_VO,
2444 IEEE80211_AC_VO,
2445 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2446 };
2447
2448 static const u8 tid_to_ucode_ac[] = {
2449 AC_BE,
2450 AC_BK,
2451 AC_BK,
2452 AC_BE,
2453 AC_VI,
2454 AC_VI,
2455 AC_VO,
2456 AC_VO,
2457 };
2458
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)2459 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2460 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2461 {
2462 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2463 struct iwl_mvm_tid_data *tid_data;
2464 u16 normalized_ssn;
2465 u16 txq_id;
2466 int ret;
2467
2468 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2469 return -EINVAL;
2470
2471 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2472 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2473 IWL_ERR(mvm,
2474 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2475 mvmsta->tid_data[tid].state);
2476 return -ENXIO;
2477 }
2478
2479 lockdep_assert_held(&mvm->mutex);
2480
2481 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2482 iwl_mvm_has_new_tx_api(mvm)) {
2483 u8 ac = tid_to_mac80211_ac[tid];
2484
2485 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2486 if (ret)
2487 return ret;
2488 }
2489
2490 spin_lock_bh(&mvmsta->lock);
2491
2492 /* possible race condition - we entered D0i3 while starting agg */
2493 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2494 spin_unlock_bh(&mvmsta->lock);
2495 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2496 return -EIO;
2497 }
2498
2499 spin_lock(&mvm->queue_info_lock);
2500
2501 /*
2502 * Note the possible cases:
2503 * 1. An enabled TXQ - TXQ needs to become agg'ed
2504 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2505 * it as reserved
2506 */
2507 txq_id = mvmsta->tid_data[tid].txq_id;
2508 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2509 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2510 IWL_MVM_DQA_MIN_DATA_QUEUE,
2511 IWL_MVM_DQA_MAX_DATA_QUEUE);
2512 if (ret < 0) {
2513 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2514 goto release_locks;
2515 }
2516
2517 txq_id = ret;
2518
2519 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2520 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2521 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2522 ret = -ENXIO;
2523 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2524 tid, IWL_MAX_HW_QUEUES - 1);
2525 goto out;
2526
2527 } else if (unlikely(mvm->queue_info[txq_id].status ==
2528 IWL_MVM_QUEUE_SHARED)) {
2529 ret = -ENXIO;
2530 IWL_DEBUG_TX_QUEUES(mvm,
2531 "Can't start tid %d agg on shared queue!\n",
2532 tid);
2533 goto release_locks;
2534 }
2535
2536 spin_unlock(&mvm->queue_info_lock);
2537
2538 IWL_DEBUG_TX_QUEUES(mvm,
2539 "AGG for tid %d will be on queue #%d\n",
2540 tid, txq_id);
2541
2542 tid_data = &mvmsta->tid_data[tid];
2543 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2544 tid_data->txq_id = txq_id;
2545 *ssn = tid_data->ssn;
2546
2547 IWL_DEBUG_TX_QUEUES(mvm,
2548 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2549 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2550 tid_data->next_reclaimed);
2551
2552 /*
2553 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2554 * to align the wrap around of ssn so we compare relevant values.
2555 */
2556 normalized_ssn = tid_data->ssn;
2557 if (mvm->trans->cfg->gen2)
2558 normalized_ssn &= 0xff;
2559
2560 if (normalized_ssn == tid_data->next_reclaimed) {
2561 tid_data->state = IWL_AGG_STARTING;
2562 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2563 } else {
2564 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2565 }
2566
2567 ret = 0;
2568 goto out;
2569
2570 release_locks:
2571 spin_unlock(&mvm->queue_info_lock);
2572 out:
2573 spin_unlock_bh(&mvmsta->lock);
2574
2575 return ret;
2576 }
2577
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)2578 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2579 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2580 bool amsdu)
2581 {
2582 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2583 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2584 unsigned int wdg_timeout =
2585 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2586 int queue, ret;
2587 bool alloc_queue = true;
2588 enum iwl_mvm_queue_status queue_status;
2589 u16 ssn;
2590
2591 struct iwl_trans_txq_scd_cfg cfg = {
2592 .sta_id = mvmsta->sta_id,
2593 .tid = tid,
2594 .frame_limit = buf_size,
2595 .aggregate = true,
2596 };
2597
2598 /*
2599 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2600 * manager, so this function should never be called in this case.
2601 */
2602 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2603 return -EINVAL;
2604
2605 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2606 != IWL_MAX_TID_COUNT);
2607
2608 spin_lock_bh(&mvmsta->lock);
2609 ssn = tid_data->ssn;
2610 queue = tid_data->txq_id;
2611 tid_data->state = IWL_AGG_ON;
2612 mvmsta->agg_tids |= BIT(tid);
2613 tid_data->ssn = 0xffff;
2614 tid_data->amsdu_in_ampdu_allowed = amsdu;
2615 spin_unlock_bh(&mvmsta->lock);
2616
2617 if (iwl_mvm_has_new_tx_api(mvm)) {
2618 /*
2619 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2620 * would have failed, so if we are here there is no need to
2621 * allocate a queue.
2622 * However, if aggregation size is different than the default
2623 * size, the scheduler should be reconfigured.
2624 * We cannot do this with the new TX API, so return unsupported
2625 * for now, until it will be offloaded to firmware..
2626 * Note that if SCD default value changes - this condition
2627 * should be updated as well.
2628 */
2629 if (buf_size < IWL_FRAME_LIMIT)
2630 return -ENOTSUPP;
2631
2632 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2633 if (ret)
2634 return -EIO;
2635 goto out;
2636 }
2637
2638 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2639
2640 spin_lock_bh(&mvm->queue_info_lock);
2641 queue_status = mvm->queue_info[queue].status;
2642 spin_unlock_bh(&mvm->queue_info_lock);
2643
2644 /* Maybe there is no need to even alloc a queue... */
2645 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2646 alloc_queue = false;
2647
2648 /*
2649 * Only reconfig the SCD for the queue if the window size has
2650 * changed from current (become smaller)
2651 */
2652 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2653 /*
2654 * If reconfiguring an existing queue, it first must be
2655 * drained
2656 */
2657 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2658 BIT(queue));
2659 if (ret) {
2660 IWL_ERR(mvm,
2661 "Error draining queue before reconfig\n");
2662 return ret;
2663 }
2664
2665 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2666 mvmsta->sta_id, tid,
2667 buf_size, ssn);
2668 if (ret) {
2669 IWL_ERR(mvm,
2670 "Error reconfiguring TXQ #%d\n", queue);
2671 return ret;
2672 }
2673 }
2674
2675 if (alloc_queue)
2676 iwl_mvm_enable_txq(mvm, queue,
2677 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2678 &cfg, wdg_timeout);
2679
2680 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2681 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2682 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2683 if (ret)
2684 return -EIO;
2685 }
2686
2687 /* No need to mark as reserved */
2688 spin_lock_bh(&mvm->queue_info_lock);
2689 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2690 spin_unlock_bh(&mvm->queue_info_lock);
2691
2692 out:
2693 /*
2694 * Even though in theory the peer could have different
2695 * aggregation reorder buffer sizes for different sessions,
2696 * our ucode doesn't allow for that and has a global limit
2697 * for each station. Therefore, use the minimum of all the
2698 * aggregation sessions and our default value.
2699 */
2700 mvmsta->max_agg_bufsize =
2701 min(mvmsta->max_agg_bufsize, buf_size);
2702 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2703
2704 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2705 sta->addr, tid);
2706
2707 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq, false);
2708 }
2709
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)2710 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2711 struct iwl_mvm_sta *mvmsta,
2712 struct iwl_mvm_tid_data *tid_data)
2713 {
2714 u16 txq_id = tid_data->txq_id;
2715
2716 if (iwl_mvm_has_new_tx_api(mvm))
2717 return;
2718
2719 spin_lock_bh(&mvm->queue_info_lock);
2720 /*
2721 * The TXQ is marked as reserved only if no traffic came through yet
2722 * This means no traffic has been sent on this TID (agg'd or not), so
2723 * we no longer have use for the queue. Since it hasn't even been
2724 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2725 * free.
2726 */
2727 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
2728 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2729 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
2730 }
2731
2732 spin_unlock_bh(&mvm->queue_info_lock);
2733 }
2734
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)2735 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2736 struct ieee80211_sta *sta, u16 tid)
2737 {
2738 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2739 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2740 u16 txq_id;
2741 int err;
2742
2743 /*
2744 * If mac80211 is cleaning its state, then say that we finished since
2745 * our state has been cleared anyway.
2746 */
2747 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2748 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2749 return 0;
2750 }
2751
2752 spin_lock_bh(&mvmsta->lock);
2753
2754 txq_id = tid_data->txq_id;
2755
2756 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2757 mvmsta->sta_id, tid, txq_id, tid_data->state);
2758
2759 mvmsta->agg_tids &= ~BIT(tid);
2760
2761 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2762
2763 switch (tid_data->state) {
2764 case IWL_AGG_ON:
2765 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2766
2767 IWL_DEBUG_TX_QUEUES(mvm,
2768 "ssn = %d, next_recl = %d\n",
2769 tid_data->ssn, tid_data->next_reclaimed);
2770
2771 tid_data->ssn = 0xffff;
2772 tid_data->state = IWL_AGG_OFF;
2773 spin_unlock_bh(&mvmsta->lock);
2774
2775 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2776
2777 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2778 return 0;
2779 case IWL_AGG_STARTING:
2780 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2781 /*
2782 * The agg session has been stopped before it was set up. This
2783 * can happen when the AddBA timer times out for example.
2784 */
2785
2786 /* No barriers since we are under mutex */
2787 lockdep_assert_held(&mvm->mutex);
2788
2789 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2790 tid_data->state = IWL_AGG_OFF;
2791 err = 0;
2792 break;
2793 default:
2794 IWL_ERR(mvm,
2795 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2796 mvmsta->sta_id, tid, tid_data->state);
2797 IWL_ERR(mvm,
2798 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2799 err = -EINVAL;
2800 }
2801
2802 spin_unlock_bh(&mvmsta->lock);
2803
2804 return err;
2805 }
2806
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)2807 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2808 struct ieee80211_sta *sta, u16 tid)
2809 {
2810 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2811 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2812 u16 txq_id;
2813 enum iwl_mvm_agg_state old_state;
2814
2815 /*
2816 * First set the agg state to OFF to avoid calling
2817 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2818 */
2819 spin_lock_bh(&mvmsta->lock);
2820 txq_id = tid_data->txq_id;
2821 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2822 mvmsta->sta_id, tid, txq_id, tid_data->state);
2823 old_state = tid_data->state;
2824 tid_data->state = IWL_AGG_OFF;
2825 mvmsta->agg_tids &= ~BIT(tid);
2826 spin_unlock_bh(&mvmsta->lock);
2827
2828 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
2829
2830 if (old_state >= IWL_AGG_ON) {
2831 iwl_mvm_drain_sta(mvm, mvmsta, true);
2832
2833 if (iwl_mvm_has_new_tx_api(mvm)) {
2834 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2835 BIT(tid), 0))
2836 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2837 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2838 } else {
2839 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2840 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2841 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2842 }
2843
2844 iwl_mvm_drain_sta(mvm, mvmsta, false);
2845
2846 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2847 }
2848
2849 return 0;
2850 }
2851
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)2852 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2853 {
2854 int i, max = -1, max_offs = -1;
2855
2856 lockdep_assert_held(&mvm->mutex);
2857
2858 /* Pick the unused key offset with the highest 'deleted'
2859 * counter. Every time a key is deleted, all the counters
2860 * are incremented and the one that was just deleted is
2861 * reset to zero. Thus, the highest counter is the one
2862 * that was deleted longest ago. Pick that one.
2863 */
2864 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2865 if (test_bit(i, mvm->fw_key_table))
2866 continue;
2867 if (mvm->fw_key_deleted[i] > max) {
2868 max = mvm->fw_key_deleted[i];
2869 max_offs = i;
2870 }
2871 }
2872
2873 if (max_offs < 0)
2874 return STA_KEY_IDX_INVALID;
2875
2876 return max_offs;
2877 }
2878
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2879 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
2880 struct ieee80211_vif *vif,
2881 struct ieee80211_sta *sta)
2882 {
2883 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2884
2885 if (sta)
2886 return iwl_mvm_sta_from_mac80211(sta);
2887
2888 /*
2889 * The device expects GTKs for station interfaces to be
2890 * installed as GTKs for the AP station. If we have no
2891 * station ID, then use AP's station ID.
2892 */
2893 if (vif->type == NL80211_IFTYPE_STATION &&
2894 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
2895 u8 sta_id = mvmvif->ap_sta_id;
2896
2897 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
2898 lockdep_is_held(&mvm->mutex));
2899
2900 /*
2901 * It is possible that the 'sta' parameter is NULL,
2902 * for example when a GTK is removed - the sta_id will then
2903 * be the AP ID, and no station was passed by mac80211.
2904 */
2905 if (IS_ERR_OR_NULL(sta))
2906 return NULL;
2907
2908 return iwl_mvm_sta_from_mac80211(sta);
2909 }
2910
2911 return NULL;
2912 }
2913
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)2914 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
2915 u32 sta_id,
2916 struct ieee80211_key_conf *key, bool mcast,
2917 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
2918 u8 key_offset, bool mfp)
2919 {
2920 union {
2921 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2922 struct iwl_mvm_add_sta_key_cmd cmd;
2923 } u = {};
2924 __le16 key_flags;
2925 int ret;
2926 u32 status;
2927 u16 keyidx;
2928 u64 pn = 0;
2929 int i, size;
2930 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2931 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2932
2933 if (sta_id == IWL_MVM_INVALID_STA)
2934 return -EINVAL;
2935
2936 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
2937 STA_KEY_FLG_KEYID_MSK;
2938 key_flags = cpu_to_le16(keyidx);
2939 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
2940
2941 switch (key->cipher) {
2942 case WLAN_CIPHER_SUITE_TKIP:
2943 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
2944 if (new_api) {
2945 memcpy((void *)&u.cmd.tx_mic_key,
2946 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
2947 IWL_MIC_KEY_SIZE);
2948
2949 memcpy((void *)&u.cmd.rx_mic_key,
2950 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
2951 IWL_MIC_KEY_SIZE);
2952 pn = atomic64_read(&key->tx_pn);
2953
2954 } else {
2955 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
2956 for (i = 0; i < 5; i++)
2957 u.cmd_v1.tkip_rx_ttak[i] =
2958 cpu_to_le16(tkip_p1k[i]);
2959 }
2960 memcpy(u.cmd.common.key, key->key, key->keylen);
2961 break;
2962 case WLAN_CIPHER_SUITE_CCMP:
2963 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
2964 memcpy(u.cmd.common.key, key->key, key->keylen);
2965 if (new_api)
2966 pn = atomic64_read(&key->tx_pn);
2967 break;
2968 case WLAN_CIPHER_SUITE_WEP104:
2969 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
2970 /* fall through */
2971 case WLAN_CIPHER_SUITE_WEP40:
2972 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
2973 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
2974 break;
2975 case WLAN_CIPHER_SUITE_GCMP_256:
2976 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
2977 /* fall through */
2978 case WLAN_CIPHER_SUITE_GCMP:
2979 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
2980 memcpy(u.cmd.common.key, key->key, key->keylen);
2981 if (new_api)
2982 pn = atomic64_read(&key->tx_pn);
2983 break;
2984 default:
2985 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
2986 memcpy(u.cmd.common.key, key->key, key->keylen);
2987 }
2988
2989 if (mcast)
2990 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2991 if (mfp)
2992 key_flags |= cpu_to_le16(STA_KEY_MFP);
2993
2994 u.cmd.common.key_offset = key_offset;
2995 u.cmd.common.key_flags = key_flags;
2996 u.cmd.common.sta_id = sta_id;
2997
2998 if (new_api) {
2999 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3000 size = sizeof(u.cmd);
3001 } else {
3002 size = sizeof(u.cmd_v1);
3003 }
3004
3005 status = ADD_STA_SUCCESS;
3006 if (cmd_flags & CMD_ASYNC)
3007 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3008 &u.cmd);
3009 else
3010 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3011 &u.cmd, &status);
3012
3013 switch (status) {
3014 case ADD_STA_SUCCESS:
3015 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3016 break;
3017 default:
3018 ret = -EIO;
3019 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3020 break;
3021 }
3022
3023 return ret;
3024 }
3025
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3026 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3027 struct ieee80211_key_conf *keyconf,
3028 u8 sta_id, bool remove_key)
3029 {
3030 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3031
3032 /* verify the key details match the required command's expectations */
3033 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3034 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3035 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3036 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3037 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3038 return -EINVAL;
3039
3040 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3041 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3042 return -EINVAL;
3043
3044 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3045 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3046
3047 if (remove_key) {
3048 /* This is a valid situation for IGTK */
3049 if (sta_id == IWL_MVM_INVALID_STA)
3050 return 0;
3051
3052 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3053 } else {
3054 struct ieee80211_key_seq seq;
3055 const u8 *pn;
3056
3057 switch (keyconf->cipher) {
3058 case WLAN_CIPHER_SUITE_AES_CMAC:
3059 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3060 break;
3061 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3062 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3063 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3064 break;
3065 default:
3066 return -EINVAL;
3067 }
3068
3069 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3070 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3071 igtk_cmd.ctrl_flags |=
3072 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3073 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3074 pn = seq.aes_cmac.pn;
3075 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3076 ((u64) pn[4] << 8) |
3077 ((u64) pn[3] << 16) |
3078 ((u64) pn[2] << 24) |
3079 ((u64) pn[1] << 32) |
3080 ((u64) pn[0] << 40));
3081 }
3082
3083 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3084 remove_key ? "removing" : "installing",
3085 igtk_cmd.sta_id);
3086
3087 if (!iwl_mvm_has_new_rx_api(mvm)) {
3088 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3089 .ctrl_flags = igtk_cmd.ctrl_flags,
3090 .key_id = igtk_cmd.key_id,
3091 .sta_id = igtk_cmd.sta_id,
3092 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3093 };
3094
3095 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3096 ARRAY_SIZE(igtk_cmd_v1.igtk));
3097 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3098 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3099 }
3100 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3101 sizeof(igtk_cmd), &igtk_cmd);
3102 }
3103
3104
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3105 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3106 struct ieee80211_vif *vif,
3107 struct ieee80211_sta *sta)
3108 {
3109 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3110
3111 if (sta)
3112 return sta->addr;
3113
3114 if (vif->type == NL80211_IFTYPE_STATION &&
3115 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3116 u8 sta_id = mvmvif->ap_sta_id;
3117 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3118 lockdep_is_held(&mvm->mutex));
3119 return sta->addr;
3120 }
3121
3122
3123 return NULL;
3124 }
3125
__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)3126 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3127 struct ieee80211_vif *vif,
3128 struct ieee80211_sta *sta,
3129 struct ieee80211_key_conf *keyconf,
3130 u8 key_offset,
3131 bool mcast)
3132 {
3133 int ret;
3134 const u8 *addr;
3135 struct ieee80211_key_seq seq;
3136 u16 p1k[5];
3137 u32 sta_id;
3138 bool mfp = false;
3139
3140 if (sta) {
3141 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3142
3143 sta_id = mvm_sta->sta_id;
3144 mfp = sta->mfp;
3145 } else if (vif->type == NL80211_IFTYPE_AP &&
3146 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3147 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3148
3149 sta_id = mvmvif->mcast_sta.sta_id;
3150 } else {
3151 IWL_ERR(mvm, "Failed to find station id\n");
3152 return -EINVAL;
3153 }
3154
3155 switch (keyconf->cipher) {
3156 case WLAN_CIPHER_SUITE_TKIP:
3157 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3158 /* get phase 1 key from mac80211 */
3159 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3160 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3161 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3162 seq.tkip.iv32, p1k, 0, key_offset,
3163 mfp);
3164 break;
3165 case WLAN_CIPHER_SUITE_CCMP:
3166 case WLAN_CIPHER_SUITE_WEP40:
3167 case WLAN_CIPHER_SUITE_WEP104:
3168 case WLAN_CIPHER_SUITE_GCMP:
3169 case WLAN_CIPHER_SUITE_GCMP_256:
3170 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3171 0, NULL, 0, key_offset, mfp);
3172 break;
3173 default:
3174 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3175 0, NULL, 0, key_offset, mfp);
3176 }
3177
3178 return ret;
3179 }
3180
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)3181 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3182 struct ieee80211_key_conf *keyconf,
3183 bool mcast)
3184 {
3185 union {
3186 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3187 struct iwl_mvm_add_sta_key_cmd cmd;
3188 } u = {};
3189 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3190 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3191 __le16 key_flags;
3192 int ret, size;
3193 u32 status;
3194
3195 /* This is a valid situation for GTK removal */
3196 if (sta_id == IWL_MVM_INVALID_STA)
3197 return 0;
3198
3199 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3200 STA_KEY_FLG_KEYID_MSK);
3201 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3202 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3203
3204 if (mcast)
3205 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3206
3207 /*
3208 * The fields assigned here are in the same location at the start
3209 * of the command, so we can do this union trick.
3210 */
3211 u.cmd.common.key_flags = key_flags;
3212 u.cmd.common.key_offset = keyconf->hw_key_idx;
3213 u.cmd.common.sta_id = sta_id;
3214
3215 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3216
3217 status = ADD_STA_SUCCESS;
3218 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3219 &status);
3220
3221 switch (status) {
3222 case ADD_STA_SUCCESS:
3223 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3224 break;
3225 default:
3226 ret = -EIO;
3227 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3228 break;
3229 }
3230
3231 return ret;
3232 }
3233
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)3234 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3235 struct ieee80211_vif *vif,
3236 struct ieee80211_sta *sta,
3237 struct ieee80211_key_conf *keyconf,
3238 u8 key_offset)
3239 {
3240 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3241 struct iwl_mvm_sta *mvm_sta;
3242 u8 sta_id = IWL_MVM_INVALID_STA;
3243 int ret;
3244 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3245
3246 lockdep_assert_held(&mvm->mutex);
3247
3248 if (vif->type != NL80211_IFTYPE_AP ||
3249 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3250 /* Get the station id from the mvm local station table */
3251 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3252 if (!mvm_sta) {
3253 IWL_ERR(mvm, "Failed to find station\n");
3254 return -EINVAL;
3255 }
3256 sta_id = mvm_sta->sta_id;
3257
3258 /*
3259 * It is possible that the 'sta' parameter is NULL, and thus
3260 * there is a need to retrieve the sta from the local station
3261 * table.
3262 */
3263 if (!sta) {
3264 sta = rcu_dereference_protected(
3265 mvm->fw_id_to_mac_id[sta_id],
3266 lockdep_is_held(&mvm->mutex));
3267 if (IS_ERR_OR_NULL(sta)) {
3268 IWL_ERR(mvm, "Invalid station id\n");
3269 return -EINVAL;
3270 }
3271 }
3272
3273 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3274 return -EINVAL;
3275 } else {
3276 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3277
3278 sta_id = mvmvif->mcast_sta.sta_id;
3279 }
3280
3281 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3282 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3283 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3284 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3285 goto end;
3286 }
3287
3288 /* If the key_offset is not pre-assigned, we need to find a
3289 * new offset to use. In normal cases, the offset is not
3290 * pre-assigned, but during HW_RESTART we want to reuse the
3291 * same indices, so we pass them when this function is called.
3292 *
3293 * In D3 entry, we need to hardcoded the indices (because the
3294 * firmware hardcodes the PTK offset to 0). In this case, we
3295 * need to make sure we don't overwrite the hw_key_idx in the
3296 * keyconf structure, because otherwise we cannot configure
3297 * the original ones back when resuming.
3298 */
3299 if (key_offset == STA_KEY_IDX_INVALID) {
3300 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3301 if (key_offset == STA_KEY_IDX_INVALID)
3302 return -ENOSPC;
3303 keyconf->hw_key_idx = key_offset;
3304 }
3305
3306 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3307 if (ret)
3308 goto end;
3309
3310 /*
3311 * For WEP, the same key is used for multicast and unicast. Upload it
3312 * again, using the same key offset, and now pointing the other one
3313 * to the same key slot (offset).
3314 * If this fails, remove the original as well.
3315 */
3316 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3317 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3318 sta) {
3319 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3320 key_offset, !mcast);
3321 if (ret) {
3322 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3323 goto end;
3324 }
3325 }
3326
3327 __set_bit(key_offset, mvm->fw_key_table);
3328
3329 end:
3330 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3331 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3332 sta ? sta->addr : zero_addr, ret);
3333 return ret;
3334 }
3335
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3336 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3337 struct ieee80211_vif *vif,
3338 struct ieee80211_sta *sta,
3339 struct ieee80211_key_conf *keyconf)
3340 {
3341 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3342 struct iwl_mvm_sta *mvm_sta;
3343 u8 sta_id = IWL_MVM_INVALID_STA;
3344 int ret, i;
3345
3346 lockdep_assert_held(&mvm->mutex);
3347
3348 /* Get the station from the mvm local station table */
3349 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3350 if (mvm_sta)
3351 sta_id = mvm_sta->sta_id;
3352 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3353 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3354
3355
3356 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3357 keyconf->keyidx, sta_id);
3358
3359 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3360 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3361 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3362 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3363
3364 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3365 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3366 keyconf->hw_key_idx);
3367 return -ENOENT;
3368 }
3369
3370 /* track which key was deleted last */
3371 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3372 if (mvm->fw_key_deleted[i] < U8_MAX)
3373 mvm->fw_key_deleted[i]++;
3374 }
3375 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3376
3377 if (sta && !mvm_sta) {
3378 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3379 return 0;
3380 }
3381
3382 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3383 if (ret)
3384 return ret;
3385
3386 /* delete WEP key twice to get rid of (now useless) offset */
3387 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3388 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3389 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3390
3391 return ret;
3392 }
3393
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)3394 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3395 struct ieee80211_vif *vif,
3396 struct ieee80211_key_conf *keyconf,
3397 struct ieee80211_sta *sta, u32 iv32,
3398 u16 *phase1key)
3399 {
3400 struct iwl_mvm_sta *mvm_sta;
3401 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3402 bool mfp = sta ? sta->mfp : false;
3403
3404 rcu_read_lock();
3405
3406 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3407 if (WARN_ON_ONCE(!mvm_sta))
3408 goto unlock;
3409 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3410 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3411 mfp);
3412
3413 unlock:
3414 rcu_read_unlock();
3415 }
3416
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)3417 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3418 struct ieee80211_sta *sta)
3419 {
3420 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3421 struct iwl_mvm_add_sta_cmd cmd = {
3422 .add_modify = STA_MODE_MODIFY,
3423 .sta_id = mvmsta->sta_id,
3424 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3425 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3426 };
3427 int ret;
3428
3429 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3430 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3431 if (ret)
3432 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3433 }
3434
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)3435 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3436 struct ieee80211_sta *sta,
3437 enum ieee80211_frame_release_type reason,
3438 u16 cnt, u16 tids, bool more_data,
3439 bool single_sta_queue)
3440 {
3441 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3442 struct iwl_mvm_add_sta_cmd cmd = {
3443 .add_modify = STA_MODE_MODIFY,
3444 .sta_id = mvmsta->sta_id,
3445 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3446 .sleep_tx_count = cpu_to_le16(cnt),
3447 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3448 };
3449 int tid, ret;
3450 unsigned long _tids = tids;
3451
3452 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3453 * Note that this field is reserved and unused by firmware not
3454 * supporting GO uAPSD, so it's safe to always do this.
3455 */
3456 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3457 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3458
3459 /* If we're releasing frames from aggregation or dqa queues then check
3460 * if all the queues that we're releasing frames from, combined, have:
3461 * - more frames than the service period, in which case more_data
3462 * needs to be set
3463 * - fewer than 'cnt' frames, in which case we need to adjust the
3464 * firmware command (but do that unconditionally)
3465 */
3466 if (single_sta_queue) {
3467 int remaining = cnt;
3468 int sleep_tx_count;
3469
3470 spin_lock_bh(&mvmsta->lock);
3471 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3472 struct iwl_mvm_tid_data *tid_data;
3473 u16 n_queued;
3474
3475 tid_data = &mvmsta->tid_data[tid];
3476
3477 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3478 if (n_queued > remaining) {
3479 more_data = true;
3480 remaining = 0;
3481 break;
3482 }
3483 remaining -= n_queued;
3484 }
3485 sleep_tx_count = cnt - remaining;
3486 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3487 mvmsta->sleep_tx_count = sleep_tx_count;
3488 spin_unlock_bh(&mvmsta->lock);
3489
3490 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3491 if (WARN_ON(cnt - remaining == 0)) {
3492 ieee80211_sta_eosp(sta);
3493 return;
3494 }
3495 }
3496
3497 /* Note: this is ignored by firmware not supporting GO uAPSD */
3498 if (more_data)
3499 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3500
3501 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3502 mvmsta->next_status_eosp = true;
3503 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3504 } else {
3505 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3506 }
3507
3508 /* block the Tx queues until the FW updated the sleep Tx count */
3509 iwl_trans_block_txq_ptrs(mvm->trans, true);
3510
3511 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3512 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3513 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3514 if (ret)
3515 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3516 }
3517
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3518 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3519 struct iwl_rx_cmd_buffer *rxb)
3520 {
3521 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3522 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3523 struct ieee80211_sta *sta;
3524 u32 sta_id = le32_to_cpu(notif->sta_id);
3525
3526 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3527 return;
3528
3529 rcu_read_lock();
3530 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3531 if (!IS_ERR_OR_NULL(sta))
3532 ieee80211_sta_eosp(sta);
3533 rcu_read_unlock();
3534 }
3535
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)3536 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3537 struct iwl_mvm_sta *mvmsta, bool disable)
3538 {
3539 struct iwl_mvm_add_sta_cmd cmd = {
3540 .add_modify = STA_MODE_MODIFY,
3541 .sta_id = mvmsta->sta_id,
3542 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3543 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3544 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3545 };
3546 int ret;
3547
3548 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3549 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3550 if (ret)
3551 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3552 }
3553
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)3554 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3555 struct ieee80211_sta *sta,
3556 bool disable)
3557 {
3558 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3559
3560 spin_lock_bh(&mvm_sta->lock);
3561
3562 if (mvm_sta->disable_tx == disable) {
3563 spin_unlock_bh(&mvm_sta->lock);
3564 return;
3565 }
3566
3567 mvm_sta->disable_tx = disable;
3568
3569 /* Tell mac80211 to start/stop queuing tx for this station */
3570 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3571
3572 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3573
3574 spin_unlock_bh(&mvm_sta->lock);
3575 }
3576
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)3577 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3578 struct iwl_mvm_vif *mvmvif,
3579 struct iwl_mvm_int_sta *sta,
3580 bool disable)
3581 {
3582 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3583 struct iwl_mvm_add_sta_cmd cmd = {
3584 .add_modify = STA_MODE_MODIFY,
3585 .sta_id = sta->sta_id,
3586 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3587 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3588 .mac_id_n_color = cpu_to_le32(id),
3589 };
3590 int ret;
3591
3592 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3593 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3594 if (ret)
3595 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3596 }
3597
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)3598 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3599 struct iwl_mvm_vif *mvmvif,
3600 bool disable)
3601 {
3602 struct ieee80211_sta *sta;
3603 struct iwl_mvm_sta *mvm_sta;
3604 int i;
3605
3606 lockdep_assert_held(&mvm->mutex);
3607
3608 /* Block/unblock all the stations of the given mvmvif */
3609 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3610 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3611 lockdep_is_held(&mvm->mutex));
3612 if (IS_ERR_OR_NULL(sta))
3613 continue;
3614
3615 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3616 if (mvm_sta->mac_id_n_color !=
3617 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3618 continue;
3619
3620 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3621 }
3622
3623 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3624 return;
3625
3626 /* Need to block/unblock also multicast station */
3627 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3628 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3629 &mvmvif->mcast_sta, disable);
3630
3631 /*
3632 * Only unblock the broadcast station (FW blocks it for immediate
3633 * quiet, not the driver)
3634 */
3635 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3636 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3637 &mvmvif->bcast_sta, disable);
3638 }
3639
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)3640 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3641 {
3642 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3643 struct iwl_mvm_sta *mvmsta;
3644
3645 rcu_read_lock();
3646
3647 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3648
3649 if (!WARN_ON(!mvmsta))
3650 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3651
3652 rcu_read_unlock();
3653 }
3654
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)3655 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3656 {
3657 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3658
3659 /*
3660 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3661 * to align the wrap around of ssn so we compare relevant values.
3662 */
3663 if (mvm->trans->cfg->gen2)
3664 sn &= 0xff;
3665
3666 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3667 }
3668