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