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[mirror_ubuntu-bionic-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 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
126 };
127 int ret;
128 u32 status;
129 u32 agg_size = 0, mpdu_dens = 0;
130
131 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
132 add_sta_cmd.station_type = mvm_sta->sta_type;
133
134 if (!update || (flags & STA_MODIFY_QUEUES)) {
135 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
136
137 if (!iwl_mvm_has_new_tx_api(mvm)) {
138 add_sta_cmd.tfd_queue_msk =
139 cpu_to_le32(mvm_sta->tfd_queue_msk);
140
141 if (flags & STA_MODIFY_QUEUES)
142 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
143 } else {
144 WARN_ON(flags & STA_MODIFY_QUEUES);
145 }
146 }
147
148 switch (sta->bandwidth) {
149 case IEEE80211_STA_RX_BW_160:
150 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
151 /* fall through */
152 case IEEE80211_STA_RX_BW_80:
153 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
154 /* fall through */
155 case IEEE80211_STA_RX_BW_40:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
157 /* fall through */
158 case IEEE80211_STA_RX_BW_20:
159 if (sta->ht_cap.ht_supported)
160 add_sta_cmd.station_flags |=
161 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
162 break;
163 }
164
165 switch (sta->rx_nss) {
166 case 1:
167 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
168 break;
169 case 2:
170 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
171 break;
172 case 3 ... 8:
173 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
174 break;
175 }
176
177 switch (sta->smps_mode) {
178 case IEEE80211_SMPS_AUTOMATIC:
179 case IEEE80211_SMPS_NUM_MODES:
180 WARN_ON(1);
181 break;
182 case IEEE80211_SMPS_STATIC:
183 /* override NSS */
184 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
186 break;
187 case IEEE80211_SMPS_DYNAMIC:
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
189 break;
190 case IEEE80211_SMPS_OFF:
191 /* nothing */
192 break;
193 }
194
195 if (sta->ht_cap.ht_supported) {
196 add_sta_cmd.station_flags_msk |=
197 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
198 STA_FLG_AGG_MPDU_DENS_MSK);
199
200 mpdu_dens = sta->ht_cap.ampdu_density;
201 }
202
203 if (sta->vht_cap.vht_supported) {
204 agg_size = sta->vht_cap.cap &
205 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
206 agg_size >>=
207 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
208 } else if (sta->ht_cap.ht_supported) {
209 agg_size = sta->ht_cap.ampdu_factor;
210 }
211
212 add_sta_cmd.station_flags |=
213 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
214 add_sta_cmd.station_flags |=
215 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
216 if (mvm_sta->associated)
217 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
218
219 if (sta->wme) {
220 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
221
222 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
223 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
224 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
225 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
226 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
227 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
228 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
229 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
230 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
231 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
232 }
233
234 status = ADD_STA_SUCCESS;
235 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
236 iwl_mvm_add_sta_cmd_size(mvm),
237 &add_sta_cmd, &status);
238 if (ret)
239 return ret;
240
241 switch (status & IWL_ADD_STA_STATUS_MASK) {
242 case ADD_STA_SUCCESS:
243 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
244 break;
245 default:
246 ret = -EIO;
247 IWL_ERR(mvm, "ADD_STA failed\n");
248 break;
249 }
250
251 return ret;
252 }
253
254 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
255 {
256 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
257 struct iwl_mvm_baid_data *ba_data;
258 struct ieee80211_sta *sta;
259 struct iwl_mvm_sta *mvm_sta;
260 unsigned long timeout;
261
262 rcu_read_lock();
263
264 ba_data = rcu_dereference(*rcu_ptr);
265
266 if (WARN_ON(!ba_data))
267 goto unlock;
268
269 if (!ba_data->timeout)
270 goto unlock;
271
272 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
273 if (time_is_after_jiffies(timeout)) {
274 mod_timer(&ba_data->session_timer, timeout);
275 goto unlock;
276 }
277
278 /* Timer expired */
279 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
280
281 /*
282 * sta should be valid unless the following happens:
283 * The firmware asserts which triggers a reconfig flow, but
284 * the reconfig fails before we set the pointer to sta into
285 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
286 * A-MDPU and hence the timer continues to run. Then, the
287 * timer expires and sta is NULL.
288 */
289 if (!sta)
290 goto unlock;
291
292 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
293 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
294 sta->addr, ba_data->tid);
295 unlock:
296 rcu_read_unlock();
297 }
298
299 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
300 struct ieee80211_sta *sta)
301 {
302 unsigned long used_hw_queues;
303 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
304 unsigned int wdg_timeout =
305 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
306 u32 ac;
307
308 lockdep_assert_held(&mvm->mutex);
309
310 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
311
312 /* Find available queues, and allocate them to the ACs */
313 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
314 u8 queue = find_first_zero_bit(&used_hw_queues,
315 mvm->first_agg_queue);
316
317 if (queue >= mvm->first_agg_queue) {
318 IWL_ERR(mvm, "Failed to allocate STA queue\n");
319 return -EBUSY;
320 }
321
322 __set_bit(queue, &used_hw_queues);
323 mvmsta->hw_queue[ac] = queue;
324 }
325
326 /* Found a place for all queues - enable them */
327 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
328 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
329 mvmsta->hw_queue[ac],
330 iwl_mvm_ac_to_tx_fifo[ac], 0,
331 wdg_timeout);
332 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
333 }
334
335 return 0;
336 }
337
338 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
339 struct ieee80211_sta *sta)
340 {
341 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
342 unsigned long sta_msk;
343 int i;
344
345 lockdep_assert_held(&mvm->mutex);
346
347 /* disable the TDLS STA-specific queues */
348 sta_msk = mvmsta->tfd_queue_msk;
349 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
350 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
351 }
352
353 /* Disable aggregations for a bitmap of TIDs for a given station */
354 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
355 unsigned long disable_agg_tids,
356 bool remove_queue)
357 {
358 struct iwl_mvm_add_sta_cmd cmd = {};
359 struct ieee80211_sta *sta;
360 struct iwl_mvm_sta *mvmsta;
361 u32 status;
362 u8 sta_id;
363 int ret;
364
365 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
366 return -EINVAL;
367
368 spin_lock_bh(&mvm->queue_info_lock);
369 sta_id = mvm->queue_info[queue].ra_sta_id;
370 spin_unlock_bh(&mvm->queue_info_lock);
371
372 rcu_read_lock();
373
374 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
375
376 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
377 rcu_read_unlock();
378 return -EINVAL;
379 }
380
381 mvmsta = iwl_mvm_sta_from_mac80211(sta);
382
383 mvmsta->tid_disable_agg |= disable_agg_tids;
384
385 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
386 cmd.sta_id = mvmsta->sta_id;
387 cmd.add_modify = STA_MODE_MODIFY;
388 cmd.modify_mask = STA_MODIFY_QUEUES;
389 if (disable_agg_tids)
390 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
391 if (remove_queue)
392 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
393 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
394 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
395
396 rcu_read_unlock();
397
398 /* Notify FW of queue removal from the STA queues */
399 status = ADD_STA_SUCCESS;
400 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
401 iwl_mvm_add_sta_cmd_size(mvm),
402 &cmd, &status);
403
404 return ret;
405 }
406
407 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
408 {
409 struct ieee80211_sta *sta;
410 struct iwl_mvm_sta *mvmsta;
411 unsigned long tid_bitmap;
412 unsigned long agg_tids = 0;
413 u8 sta_id;
414 int tid;
415
416 lockdep_assert_held(&mvm->mutex);
417
418 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
419 return -EINVAL;
420
421 spin_lock_bh(&mvm->queue_info_lock);
422 sta_id = mvm->queue_info[queue].ra_sta_id;
423 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
424 spin_unlock_bh(&mvm->queue_info_lock);
425
426 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
427 lockdep_is_held(&mvm->mutex));
428
429 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
430 return -EINVAL;
431
432 mvmsta = iwl_mvm_sta_from_mac80211(sta);
433
434 spin_lock_bh(&mvmsta->lock);
435 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
436 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
437 agg_tids |= BIT(tid);
438 }
439 spin_unlock_bh(&mvmsta->lock);
440
441 return agg_tids;
442 }
443
444 /*
445 * Remove a queue from a station's resources.
446 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
447 * doesn't disable the queue
448 */
449 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
450 {
451 struct ieee80211_sta *sta;
452 struct iwl_mvm_sta *mvmsta;
453 unsigned long tid_bitmap;
454 unsigned long disable_agg_tids = 0;
455 u8 sta_id;
456 int tid;
457
458 lockdep_assert_held(&mvm->mutex);
459
460 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
461 return -EINVAL;
462
463 spin_lock_bh(&mvm->queue_info_lock);
464 sta_id = mvm->queue_info[queue].ra_sta_id;
465 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
466 spin_unlock_bh(&mvm->queue_info_lock);
467
468 rcu_read_lock();
469
470 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
471
472 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
473 rcu_read_unlock();
474 return 0;
475 }
476
477 mvmsta = iwl_mvm_sta_from_mac80211(sta);
478
479 spin_lock_bh(&mvmsta->lock);
480 /* Unmap MAC queues and TIDs from this queue */
481 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
482 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
483 disable_agg_tids |= BIT(tid);
484 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
485 }
486
487 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
488 spin_unlock_bh(&mvmsta->lock);
489
490 rcu_read_unlock();
491
492 return disable_agg_tids;
493 }
494
495 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
496 bool same_sta)
497 {
498 struct iwl_mvm_sta *mvmsta;
499 u8 txq_curr_ac, sta_id, tid;
500 unsigned long disable_agg_tids = 0;
501 int ret;
502
503 lockdep_assert_held(&mvm->mutex);
504
505 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
506 return -EINVAL;
507
508 spin_lock_bh(&mvm->queue_info_lock);
509 txq_curr_ac = mvm->queue_info[queue].mac80211_ac;
510 sta_id = mvm->queue_info[queue].ra_sta_id;
511 tid = mvm->queue_info[queue].txq_tid;
512 spin_unlock_bh(&mvm->queue_info_lock);
513
514 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
515 if (WARN_ON(!mvmsta))
516 return -EINVAL;
517
518 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
519 /* Disable the queue */
520 if (disable_agg_tids)
521 iwl_mvm_invalidate_sta_queue(mvm, queue,
522 disable_agg_tids, false);
523
524 ret = iwl_mvm_disable_txq(mvm, queue,
525 mvmsta->vif->hw_queue[txq_curr_ac],
526 tid, 0);
527 if (ret) {
528 /* Re-mark the inactive queue as inactive */
529 spin_lock_bh(&mvm->queue_info_lock);
530 mvm->queue_info[queue].status = IWL_MVM_QUEUE_INACTIVE;
531 spin_unlock_bh(&mvm->queue_info_lock);
532 IWL_ERR(mvm,
533 "Failed to free inactive queue %d (ret=%d)\n",
534 queue, ret);
535
536 return ret;
537 }
538
539 /* If TXQ is allocated to another STA, update removal in FW */
540 if (!same_sta)
541 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
542
543 return 0;
544 }
545
546 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
547 unsigned long tfd_queue_mask, u8 ac)
548 {
549 int queue = 0;
550 u8 ac_to_queue[IEEE80211_NUM_ACS];
551 int i;
552
553 lockdep_assert_held(&mvm->queue_info_lock);
554 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
555 return -EINVAL;
556
557 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
558
559 /* See what ACs the existing queues for this STA have */
560 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
561 /* Only DATA queues can be shared */
562 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
563 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
564 continue;
565
566 /* Don't try and take queues being reconfigured */
567 if (mvm->queue_info[queue].status ==
568 IWL_MVM_QUEUE_RECONFIGURING)
569 continue;
570
571 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
572 }
573
574 /*
575 * The queue to share is chosen only from DATA queues as follows (in
576 * descending priority):
577 * 1. An AC_BE queue
578 * 2. Same AC queue
579 * 3. Highest AC queue that is lower than new AC
580 * 4. Any existing AC (there always is at least 1 DATA queue)
581 */
582
583 /* Priority 1: An AC_BE queue */
584 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
585 queue = ac_to_queue[IEEE80211_AC_BE];
586 /* Priority 2: Same AC queue */
587 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
588 queue = ac_to_queue[ac];
589 /* Priority 3a: If new AC is VO and VI exists - use VI */
590 else if (ac == IEEE80211_AC_VO &&
591 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
592 queue = ac_to_queue[IEEE80211_AC_VI];
593 /* Priority 3b: No BE so only AC less than the new one is BK */
594 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
595 queue = ac_to_queue[IEEE80211_AC_BK];
596 /* Priority 4a: No BE nor BK - use VI if exists */
597 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
598 queue = ac_to_queue[IEEE80211_AC_VI];
599 /* Priority 4b: No BE, BK nor VI - use VO if exists */
600 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
601 queue = ac_to_queue[IEEE80211_AC_VO];
602
603 /* Make sure queue found (or not) is legal */
604 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
605 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
606 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
607 IWL_ERR(mvm, "No DATA queues available to share\n");
608 return -ENOSPC;
609 }
610
611 /* Make sure the queue isn't in the middle of being reconfigured */
612 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_RECONFIGURING) {
613 IWL_ERR(mvm,
614 "TXQ %d is in the middle of re-config - try again\n",
615 queue);
616 return -EBUSY;
617 }
618
619 return queue;
620 }
621
622 /*
623 * If a given queue has a higher AC than the TID stream that is being compared
624 * to, the queue needs to be redirected to the lower AC. This function does that
625 * in such a case, otherwise - if no redirection required - it does nothing,
626 * unless the %force param is true.
627 */
628 int iwl_mvm_scd_queue_redirect(struct iwl_mvm *mvm, int queue, int tid,
629 int ac, int ssn, unsigned int wdg_timeout,
630 bool force)
631 {
632 struct iwl_scd_txq_cfg_cmd cmd = {
633 .scd_queue = queue,
634 .action = SCD_CFG_DISABLE_QUEUE,
635 };
636 bool shared_queue;
637 unsigned long mq;
638 int ret;
639
640 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
641 return -EINVAL;
642
643 /*
644 * If the AC is lower than current one - FIFO needs to be redirected to
645 * the lowest one of the streams in the queue. Check if this is needed
646 * here.
647 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
648 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
649 * we need to check if the numerical value of X is LARGER than of Y.
650 */
651 spin_lock_bh(&mvm->queue_info_lock);
652 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
653 spin_unlock_bh(&mvm->queue_info_lock);
654
655 IWL_DEBUG_TX_QUEUES(mvm,
656 "No redirection needed on TXQ #%d\n",
657 queue);
658 return 0;
659 }
660
661 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
662 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
663 cmd.tid = mvm->queue_info[queue].txq_tid;
664 mq = mvm->hw_queue_to_mac80211[queue];
665 shared_queue = (mvm->queue_info[queue].hw_queue_refcount > 1);
666 spin_unlock_bh(&mvm->queue_info_lock);
667
668 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
669 queue, iwl_mvm_ac_to_tx_fifo[ac]);
670
671 /* Stop MAC queues and wait for this queue to empty */
672 iwl_mvm_stop_mac_queues(mvm, mq);
673 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
674 if (ret) {
675 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
676 queue);
677 ret = -EIO;
678 goto out;
679 }
680
681 /* Before redirecting the queue we need to de-activate it */
682 iwl_trans_txq_disable(mvm->trans, queue, false);
683 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
684 if (ret)
685 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
686 ret);
687
688 /* Make sure the SCD wrptr is correctly set before reconfiguring */
689 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
690
691 /* Update the TID "owner" of the queue */
692 spin_lock_bh(&mvm->queue_info_lock);
693 mvm->queue_info[queue].txq_tid = tid;
694 spin_unlock_bh(&mvm->queue_info_lock);
695
696 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
697
698 /* Redirect to lower AC */
699 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
700 cmd.sta_id, tid, LINK_QUAL_AGG_FRAME_LIMIT_DEF,
701 ssn);
702
703 /* Update AC marking of the queue */
704 spin_lock_bh(&mvm->queue_info_lock);
705 mvm->queue_info[queue].mac80211_ac = ac;
706 spin_unlock_bh(&mvm->queue_info_lock);
707
708 /*
709 * Mark queue as shared in transport if shared
710 * Note this has to be done after queue enablement because enablement
711 * can also set this value, and there is no indication there to shared
712 * queues
713 */
714 if (shared_queue)
715 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
716
717 out:
718 /* Continue using the MAC queues */
719 iwl_mvm_start_mac_queues(mvm, mq);
720
721 return ret;
722 }
723
724 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
725 struct ieee80211_sta *sta, u8 ac,
726 int tid)
727 {
728 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
729 unsigned int wdg_timeout =
730 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
731 u8 mac_queue = mvmsta->vif->hw_queue[ac];
732 int queue = -1;
733
734 lockdep_assert_held(&mvm->mutex);
735
736 IWL_DEBUG_TX_QUEUES(mvm,
737 "Allocating queue for sta %d on tid %d\n",
738 mvmsta->sta_id, tid);
739 queue = iwl_mvm_tvqm_enable_txq(mvm, mac_queue, mvmsta->sta_id, tid,
740 wdg_timeout);
741 if (queue < 0)
742 return queue;
743
744 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
745
746 spin_lock_bh(&mvmsta->lock);
747 mvmsta->tid_data[tid].txq_id = queue;
748 mvmsta->tid_data[tid].is_tid_active = true;
749 spin_unlock_bh(&mvmsta->lock);
750
751 return 0;
752 }
753
754 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
755 struct ieee80211_sta *sta, u8 ac, int tid,
756 struct ieee80211_hdr *hdr)
757 {
758 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
759 struct iwl_trans_txq_scd_cfg cfg = {
760 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
761 .sta_id = mvmsta->sta_id,
762 .tid = tid,
763 .frame_limit = IWL_FRAME_LIMIT,
764 };
765 unsigned int wdg_timeout =
766 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
767 u8 mac_queue = mvmsta->vif->hw_queue[ac];
768 int queue = -1;
769 bool using_inactive_queue = false, same_sta = false;
770 unsigned long disable_agg_tids = 0;
771 enum iwl_mvm_agg_state queue_state;
772 bool shared_queue = false, inc_ssn;
773 int ssn;
774 unsigned long tfd_queue_mask;
775 int ret;
776
777 lockdep_assert_held(&mvm->mutex);
778
779 if (iwl_mvm_has_new_tx_api(mvm))
780 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
781
782 spin_lock_bh(&mvmsta->lock);
783 tfd_queue_mask = mvmsta->tfd_queue_msk;
784 spin_unlock_bh(&mvmsta->lock);
785
786 spin_lock_bh(&mvm->queue_info_lock);
787
788 /*
789 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
790 * exists
791 */
792 if (!ieee80211_is_data_qos(hdr->frame_control) ||
793 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
794 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
795 IWL_MVM_DQA_MIN_MGMT_QUEUE,
796 IWL_MVM_DQA_MAX_MGMT_QUEUE);
797 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
798 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
799 queue);
800
801 /* If no such queue is found, we'll use a DATA queue instead */
802 }
803
804 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
805 (mvm->queue_info[mvmsta->reserved_queue].status ==
806 IWL_MVM_QUEUE_RESERVED ||
807 mvm->queue_info[mvmsta->reserved_queue].status ==
808 IWL_MVM_QUEUE_INACTIVE)) {
809 queue = mvmsta->reserved_queue;
810 mvm->queue_info[queue].reserved = true;
811 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
812 }
813
814 if (queue < 0)
815 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
816 IWL_MVM_DQA_MIN_DATA_QUEUE,
817 IWL_MVM_DQA_MAX_DATA_QUEUE);
818
819 /*
820 * Check if this queue is already allocated but inactive.
821 * In such a case, we'll need to first free this queue before enabling
822 * it again, so we'll mark it as reserved to make sure no new traffic
823 * arrives on it
824 */
825 if (queue > 0 &&
826 mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
827 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
828 using_inactive_queue = true;
829 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
830 IWL_DEBUG_TX_QUEUES(mvm,
831 "Re-assigning TXQ %d: sta_id=%d, tid=%d\n",
832 queue, mvmsta->sta_id, tid);
833 }
834
835 /* No free queue - we'll have to share */
836 if (queue <= 0) {
837 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
838 if (queue > 0) {
839 shared_queue = true;
840 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
841 }
842 }
843
844 /*
845 * Mark TXQ as ready, even though it hasn't been fully configured yet,
846 * to make sure no one else takes it.
847 * This will allow avoiding re-acquiring the lock at the end of the
848 * configuration. On error we'll mark it back as free.
849 */
850 if ((queue > 0) && !shared_queue)
851 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
852
853 spin_unlock_bh(&mvm->queue_info_lock);
854
855 /* This shouldn't happen - out of queues */
856 if (WARN_ON(queue <= 0)) {
857 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
858 tid, cfg.sta_id);
859 return queue;
860 }
861
862 /*
863 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
864 * but for configuring the SCD to send A-MPDUs we need to mark the queue
865 * as aggregatable.
866 * Mark all DATA queues as allowing to be aggregated at some point
867 */
868 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
869 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
870
871 /*
872 * If this queue was previously inactive (idle) - we need to free it
873 * first
874 */
875 if (using_inactive_queue) {
876 ret = iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
877 if (ret)
878 return ret;
879 }
880
881 IWL_DEBUG_TX_QUEUES(mvm,
882 "Allocating %squeue #%d to sta %d on tid %d\n",
883 shared_queue ? "shared " : "", queue,
884 mvmsta->sta_id, tid);
885
886 if (shared_queue) {
887 /* Disable any open aggs on this queue */
888 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
889
890 if (disable_agg_tids) {
891 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
892 queue);
893 iwl_mvm_invalidate_sta_queue(mvm, queue,
894 disable_agg_tids, false);
895 }
896 }
897
898 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
899 inc_ssn = iwl_mvm_enable_txq(mvm, queue, mac_queue,
900 ssn, &cfg, wdg_timeout);
901 if (inc_ssn) {
902 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
903 le16_add_cpu(&hdr->seq_ctrl, 0x10);
904 }
905
906 /*
907 * Mark queue as shared in transport if shared
908 * Note this has to be done after queue enablement because enablement
909 * can also set this value, and there is no indication there to shared
910 * queues
911 */
912 if (shared_queue)
913 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
914
915 spin_lock_bh(&mvmsta->lock);
916 /*
917 * This looks racy, but it is not. We have only one packet for
918 * this ra/tid in our Tx path since we stop the Qdisc when we
919 * need to allocate a new TFD queue.
920 */
921 if (inc_ssn)
922 mvmsta->tid_data[tid].seq_number += 0x10;
923 mvmsta->tid_data[tid].txq_id = queue;
924 mvmsta->tid_data[tid].is_tid_active = true;
925 mvmsta->tfd_queue_msk |= BIT(queue);
926 queue_state = mvmsta->tid_data[tid].state;
927
928 if (mvmsta->reserved_queue == queue)
929 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
930 spin_unlock_bh(&mvmsta->lock);
931
932 if (!shared_queue) {
933 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
934 if (ret)
935 goto out_err;
936
937 /* If we need to re-enable aggregations... */
938 if (queue_state == IWL_AGG_ON) {
939 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
940 if (ret)
941 goto out_err;
942 }
943 } else {
944 /* Redirect queue, if needed */
945 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid, ac, ssn,
946 wdg_timeout, false);
947 if (ret)
948 goto out_err;
949 }
950
951 return 0;
952
953 out_err:
954 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
955
956 return ret;
957 }
958
959 static void iwl_mvm_change_queue_owner(struct iwl_mvm *mvm, int queue)
960 {
961 struct iwl_scd_txq_cfg_cmd cmd = {
962 .scd_queue = queue,
963 .action = SCD_CFG_UPDATE_QUEUE_TID,
964 };
965 int tid;
966 unsigned long tid_bitmap;
967 int ret;
968
969 lockdep_assert_held(&mvm->mutex);
970
971 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
972 return;
973
974 spin_lock_bh(&mvm->queue_info_lock);
975 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
976 spin_unlock_bh(&mvm->queue_info_lock);
977
978 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
979 return;
980
981 /* Find any TID for queue */
982 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
983 cmd.tid = tid;
984 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
985
986 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
987 if (ret) {
988 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
989 queue, ret);
990 return;
991 }
992
993 spin_lock_bh(&mvm->queue_info_lock);
994 mvm->queue_info[queue].txq_tid = tid;
995 spin_unlock_bh(&mvm->queue_info_lock);
996 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
997 queue, tid);
998 }
999
1000 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1001 {
1002 struct ieee80211_sta *sta;
1003 struct iwl_mvm_sta *mvmsta;
1004 u8 sta_id;
1005 int tid = -1;
1006 unsigned long tid_bitmap;
1007 unsigned int wdg_timeout;
1008 int ssn;
1009 int ret = true;
1010
1011 /* queue sharing is disabled on new TX path */
1012 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1013 return;
1014
1015 lockdep_assert_held(&mvm->mutex);
1016
1017 spin_lock_bh(&mvm->queue_info_lock);
1018 sta_id = mvm->queue_info[queue].ra_sta_id;
1019 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1020 spin_unlock_bh(&mvm->queue_info_lock);
1021
1022 /* Find TID for queue, and make sure it is the only one on the queue */
1023 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1024 if (tid_bitmap != BIT(tid)) {
1025 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1026 queue, tid_bitmap);
1027 return;
1028 }
1029
1030 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1031 tid);
1032
1033 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1034 lockdep_is_held(&mvm->mutex));
1035
1036 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1037 return;
1038
1039 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1040 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1041
1042 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1043
1044 ret = iwl_mvm_scd_queue_redirect(mvm, queue, tid,
1045 tid_to_mac80211_ac[tid], ssn,
1046 wdg_timeout, true);
1047 if (ret) {
1048 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1049 return;
1050 }
1051
1052 /* If aggs should be turned back on - do it */
1053 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1054 struct iwl_mvm_add_sta_cmd cmd = {0};
1055
1056 mvmsta->tid_disable_agg &= ~BIT(tid);
1057
1058 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1059 cmd.sta_id = mvmsta->sta_id;
1060 cmd.add_modify = STA_MODE_MODIFY;
1061 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1062 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1063 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1064
1065 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1066 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1067 if (!ret) {
1068 IWL_DEBUG_TX_QUEUES(mvm,
1069 "TXQ #%d is now aggregated again\n",
1070 queue);
1071
1072 /* Mark queue intenally as aggregating again */
1073 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1074 }
1075 }
1076
1077 spin_lock_bh(&mvm->queue_info_lock);
1078 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1079 spin_unlock_bh(&mvm->queue_info_lock);
1080 }
1081
1082 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
1083 {
1084 if (tid == IWL_MAX_TID_COUNT)
1085 return IEEE80211_AC_VO; /* MGMT */
1086
1087 return tid_to_mac80211_ac[tid];
1088 }
1089
1090 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
1091 struct ieee80211_sta *sta, int tid)
1092 {
1093 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1094 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1095 struct sk_buff *skb;
1096 struct ieee80211_hdr *hdr;
1097 struct sk_buff_head deferred_tx;
1098 u8 mac_queue;
1099 bool no_queue = false; /* Marks if there is a problem with the queue */
1100 u8 ac;
1101
1102 lockdep_assert_held(&mvm->mutex);
1103
1104 skb = skb_peek(&tid_data->deferred_tx_frames);
1105 if (!skb)
1106 return;
1107 hdr = (void *)skb->data;
1108
1109 ac = iwl_mvm_tid_to_ac_queue(tid);
1110 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
1111
1112 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE &&
1113 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
1114 IWL_ERR(mvm,
1115 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
1116 mvmsta->sta_id, tid);
1117
1118 /*
1119 * Mark queue as problematic so later the deferred traffic is
1120 * freed, as we can do nothing with it
1121 */
1122 no_queue = true;
1123 }
1124
1125 __skb_queue_head_init(&deferred_tx);
1126
1127 /* Disable bottom-halves when entering TX path */
1128 local_bh_disable();
1129 spin_lock(&mvmsta->lock);
1130 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
1131 mvmsta->deferred_traffic_tid_map &= ~BIT(tid);
1132 spin_unlock(&mvmsta->lock);
1133
1134 while ((skb = __skb_dequeue(&deferred_tx)))
1135 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
1136 ieee80211_free_txskb(mvm->hw, skb);
1137 local_bh_enable();
1138
1139 /* Wake queue */
1140 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
1141 }
1142
1143 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1144 {
1145 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1146 add_stream_wk);
1147 struct ieee80211_sta *sta;
1148 struct iwl_mvm_sta *mvmsta;
1149 unsigned long deferred_tid_traffic;
1150 int queue, sta_id, tid;
1151
1152 /* Check inactivity of queues */
1153 iwl_mvm_inactivity_check(mvm);
1154
1155 mutex_lock(&mvm->mutex);
1156
1157 /* No queue reconfiguration in TVQM mode */
1158 if (iwl_mvm_has_new_tx_api(mvm))
1159 goto alloc_queues;
1160
1161 /* Reconfigure queues requiring reconfiguation */
1162 for (queue = 0; queue < ARRAY_SIZE(mvm->queue_info); queue++) {
1163 bool reconfig;
1164 bool change_owner;
1165
1166 spin_lock_bh(&mvm->queue_info_lock);
1167 reconfig = (mvm->queue_info[queue].status ==
1168 IWL_MVM_QUEUE_RECONFIGURING);
1169
1170 /*
1171 * We need to take into account a situation in which a TXQ was
1172 * allocated to TID x, and then turned shared by adding TIDs y
1173 * and z. If TID x becomes inactive and is removed from the TXQ,
1174 * ownership must be given to one of the remaining TIDs.
1175 * This is mainly because if TID x continues - a new queue can't
1176 * be allocated for it as long as it is an owner of another TXQ.
1177 */
1178 change_owner = !(mvm->queue_info[queue].tid_bitmap &
1179 BIT(mvm->queue_info[queue].txq_tid)) &&
1180 (mvm->queue_info[queue].status ==
1181 IWL_MVM_QUEUE_SHARED);
1182 spin_unlock_bh(&mvm->queue_info_lock);
1183
1184 if (reconfig)
1185 iwl_mvm_unshare_queue(mvm, queue);
1186 else if (change_owner)
1187 iwl_mvm_change_queue_owner(mvm, queue);
1188 }
1189
1190 alloc_queues:
1191 /* Go over all stations with deferred traffic */
1192 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
1193 IWL_MVM_STATION_COUNT) {
1194 clear_bit(sta_id, mvm->sta_deferred_frames);
1195 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1196 lockdep_is_held(&mvm->mutex));
1197 if (IS_ERR_OR_NULL(sta))
1198 continue;
1199
1200 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1201 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
1202
1203 for_each_set_bit(tid, &deferred_tid_traffic,
1204 IWL_MAX_TID_COUNT + 1)
1205 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
1206 }
1207
1208 mutex_unlock(&mvm->mutex);
1209 }
1210
1211 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1212 struct ieee80211_sta *sta,
1213 enum nl80211_iftype vif_type)
1214 {
1215 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1216 int queue;
1217 bool using_inactive_queue = false, same_sta = false;
1218
1219 /* queue reserving is disabled on new TX path */
1220 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1221 return 0;
1222
1223 /*
1224 * Check for inactive queues, so we don't reach a situation where we
1225 * can't add a STA due to a shortage in queues that doesn't really exist
1226 */
1227 iwl_mvm_inactivity_check(mvm);
1228
1229 spin_lock_bh(&mvm->queue_info_lock);
1230
1231 /* Make sure we have free resources for this STA */
1232 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1233 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
1234 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1235 IWL_MVM_QUEUE_FREE))
1236 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1237 else
1238 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1239 IWL_MVM_DQA_MIN_DATA_QUEUE,
1240 IWL_MVM_DQA_MAX_DATA_QUEUE);
1241 if (queue < 0) {
1242 spin_unlock_bh(&mvm->queue_info_lock);
1243 IWL_ERR(mvm, "No available queues for new station\n");
1244 return -ENOSPC;
1245 } else if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_INACTIVE) {
1246 /*
1247 * If this queue is already allocated but inactive we'll need to
1248 * first free this queue before enabling it again, we'll mark
1249 * it as reserved to make sure no new traffic arrives on it
1250 */
1251 using_inactive_queue = true;
1252 same_sta = mvm->queue_info[queue].ra_sta_id == mvmsta->sta_id;
1253 }
1254 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1255
1256 spin_unlock_bh(&mvm->queue_info_lock);
1257
1258 mvmsta->reserved_queue = queue;
1259
1260 if (using_inactive_queue)
1261 iwl_mvm_free_inactive_queue(mvm, queue, same_sta);
1262
1263 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1264 queue, mvmsta->sta_id);
1265
1266 return 0;
1267 }
1268
1269 /*
1270 * In DQA mode, after a HW restart the queues should be allocated as before, in
1271 * order to avoid race conditions when there are shared queues. This function
1272 * does the re-mapping and queue allocation.
1273 *
1274 * Note that re-enabling aggregations isn't done in this function.
1275 */
1276 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1277 struct iwl_mvm_sta *mvm_sta)
1278 {
1279 unsigned int wdg_timeout =
1280 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1281 int i;
1282 struct iwl_trans_txq_scd_cfg cfg = {
1283 .sta_id = mvm_sta->sta_id,
1284 .frame_limit = IWL_FRAME_LIMIT,
1285 };
1286
1287 /* Make sure reserved queue is still marked as such (if allocated) */
1288 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1289 mvm->queue_info[mvm_sta->reserved_queue].status =
1290 IWL_MVM_QUEUE_RESERVED;
1291
1292 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1293 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1294 int txq_id = tid_data->txq_id;
1295 int ac;
1296 u8 mac_queue;
1297
1298 if (txq_id == IWL_MVM_INVALID_QUEUE)
1299 continue;
1300
1301 skb_queue_head_init(&tid_data->deferred_tx_frames);
1302
1303 ac = tid_to_mac80211_ac[i];
1304 mac_queue = mvm_sta->vif->hw_queue[ac];
1305
1306 if (iwl_mvm_has_new_tx_api(mvm)) {
1307 IWL_DEBUG_TX_QUEUES(mvm,
1308 "Re-mapping sta %d tid %d\n",
1309 mvm_sta->sta_id, i);
1310 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mac_queue,
1311 mvm_sta->sta_id,
1312 i, wdg_timeout);
1313 tid_data->txq_id = txq_id;
1314 } else {
1315 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1316
1317 cfg.tid = i;
1318 cfg.fifo = iwl_mvm_ac_to_tx_fifo[ac];
1319 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1320 txq_id ==
1321 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1322
1323 IWL_DEBUG_TX_QUEUES(mvm,
1324 "Re-mapping sta %d tid %d to queue %d\n",
1325 mvm_sta->sta_id, i, txq_id);
1326
1327 iwl_mvm_enable_txq(mvm, txq_id, mac_queue, seq, &cfg,
1328 wdg_timeout);
1329 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1330 }
1331 }
1332
1333 atomic_set(&mvm->pending_frames[mvm_sta->sta_id], 0);
1334 }
1335
1336 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1337 struct ieee80211_vif *vif,
1338 struct ieee80211_sta *sta)
1339 {
1340 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1341 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1342 struct iwl_mvm_rxq_dup_data *dup_data;
1343 int i, ret, sta_id;
1344
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 /* In DQA mode, if this is a HW restart, re-alloc existing queues */
1359 if (iwl_mvm_is_dqa_supported(mvm) &&
1360 test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1361 iwl_mvm_realloc_queues_after_restart(mvm, mvm_sta);
1362 goto update_fw;
1363 }
1364
1365 mvm_sta->sta_id = sta_id;
1366 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1367 mvmvif->color);
1368 mvm_sta->vif = vif;
1369 if (!mvm->trans->cfg->gen2)
1370 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1371 else
1372 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1373 mvm_sta->tx_protection = 0;
1374 mvm_sta->tt_tx_protection = false;
1375 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1376
1377 /* HW restart, don't assume the memory has been zeroed */
1378 atomic_set(&mvm->pending_frames[sta_id], 0);
1379 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1380 mvm_sta->tfd_queue_msk = 0;
1381
1382 /*
1383 * Allocate new queues for a TDLS station, unless we're in DQA mode,
1384 * and then they'll be allocated dynamically
1385 */
1386 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls) {
1387 ret = iwl_mvm_tdls_sta_init(mvm, sta);
1388 if (ret)
1389 return ret;
1390 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
1391 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1392 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
1393 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
1394 }
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 if (!iwl_mvm_is_dqa_supported(mvm))
1403 continue;
1404
1405 /*
1406 * Mark all queues for this STA as unallocated and defer TX
1407 * frames until the queue is allocated
1408 */
1409 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1410 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
1411 }
1412 mvm_sta->deferred_traffic_tid_map = 0;
1413 mvm_sta->agg_tids = 0;
1414
1415 if (iwl_mvm_has_new_rx_api(mvm) &&
1416 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1417 int q;
1418
1419 dup_data = kcalloc(mvm->trans->num_rx_queues,
1420 sizeof(*dup_data), GFP_KERNEL);
1421 if (!dup_data)
1422 return -ENOMEM;
1423 /*
1424 * Initialize all the last_seq values to 0xffff which can never
1425 * compare equal to the frame's seq_ctrl in the check in
1426 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1427 * number and fragmented packets don't reach that function.
1428 *
1429 * This thus allows receiving a packet with seqno 0 and the
1430 * retry bit set as the very first packet on a new TID.
1431 */
1432 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1433 memset(dup_data[q].last_seq, 0xff,
1434 sizeof(dup_data[q].last_seq));
1435 mvm_sta->dup_data = dup_data;
1436 }
1437
1438 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1439 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1440 ieee80211_vif_type_p2p(vif));
1441 if (ret)
1442 goto err;
1443 }
1444
1445 update_fw:
1446 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
1447 if (ret)
1448 goto err;
1449
1450 if (vif->type == NL80211_IFTYPE_STATION) {
1451 if (!sta->tdls) {
1452 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1453 mvmvif->ap_sta_id = sta_id;
1454 } else {
1455 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1456 }
1457 }
1458
1459 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1460
1461 return 0;
1462
1463 err:
1464 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1465 iwl_mvm_tdls_sta_deinit(mvm, sta);
1466 return ret;
1467 }
1468
1469 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1470 bool drain)
1471 {
1472 struct iwl_mvm_add_sta_cmd cmd = {};
1473 int ret;
1474 u32 status;
1475
1476 lockdep_assert_held(&mvm->mutex);
1477
1478 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1479 cmd.sta_id = mvmsta->sta_id;
1480 cmd.add_modify = STA_MODE_MODIFY;
1481 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1482 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1483
1484 status = ADD_STA_SUCCESS;
1485 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1486 iwl_mvm_add_sta_cmd_size(mvm),
1487 &cmd, &status);
1488 if (ret)
1489 return ret;
1490
1491 switch (status & IWL_ADD_STA_STATUS_MASK) {
1492 case ADD_STA_SUCCESS:
1493 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1494 mvmsta->sta_id);
1495 break;
1496 default:
1497 ret = -EIO;
1498 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1499 mvmsta->sta_id);
1500 break;
1501 }
1502
1503 return ret;
1504 }
1505
1506 /*
1507 * Remove a station from the FW table. Before sending the command to remove
1508 * the station validate that the station is indeed known to the driver (sanity
1509 * only).
1510 */
1511 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1512 {
1513 struct ieee80211_sta *sta;
1514 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1515 .sta_id = sta_id,
1516 };
1517 int ret;
1518
1519 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1520 lockdep_is_held(&mvm->mutex));
1521
1522 /* Note: internal stations are marked as error values */
1523 if (!sta) {
1524 IWL_ERR(mvm, "Invalid station id\n");
1525 return -EINVAL;
1526 }
1527
1528 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1529 sizeof(rm_sta_cmd), &rm_sta_cmd);
1530 if (ret) {
1531 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1532 return ret;
1533 }
1534
1535 return 0;
1536 }
1537
1538 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
1539 {
1540 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
1541 u8 sta_id;
1542
1543 /*
1544 * The mutex is needed because of the SYNC cmd, but not only: if the
1545 * work would run concurrently with iwl_mvm_rm_sta, it would run before
1546 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
1547 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
1548 * that later.
1549 */
1550 mutex_lock(&mvm->mutex);
1551
1552 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
1553 int ret;
1554 struct ieee80211_sta *sta =
1555 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1556 lockdep_is_held(&mvm->mutex));
1557
1558 /*
1559 * This station is in use or RCU-removed; the latter happens in
1560 * managed mode, where mac80211 removes the station before we
1561 * can remove it from firmware (we can only do that after the
1562 * MAC is marked unassociated), and possibly while the deauth
1563 * frame to disconnect from the AP is still queued. Then, the
1564 * station pointer is -ENOENT when the last skb is reclaimed.
1565 */
1566 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
1567 continue;
1568
1569 if (PTR_ERR(sta) == -EINVAL) {
1570 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
1571 sta_id);
1572 continue;
1573 }
1574
1575 if (!sta) {
1576 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
1577 sta_id);
1578 continue;
1579 }
1580
1581 WARN_ON(PTR_ERR(sta) != -EBUSY);
1582 /* This station was removed and we waited until it got drained,
1583 * we can now proceed and remove it.
1584 */
1585 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1586 if (ret) {
1587 IWL_ERR(mvm,
1588 "Couldn't remove sta %d after it was drained\n",
1589 sta_id);
1590 continue;
1591 }
1592 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1593 clear_bit(sta_id, mvm->sta_drained);
1594
1595 if (mvm->tfd_drained[sta_id]) {
1596 unsigned long i, msk = mvm->tfd_drained[sta_id];
1597
1598 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
1599 iwl_mvm_disable_txq(mvm, i, i,
1600 IWL_MAX_TID_COUNT, 0);
1601
1602 mvm->tfd_drained[sta_id] = 0;
1603 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
1604 sta_id, msk);
1605 }
1606 }
1607
1608 mutex_unlock(&mvm->mutex);
1609 }
1610
1611 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1612 struct ieee80211_vif *vif,
1613 struct iwl_mvm_sta *mvm_sta)
1614 {
1615 int ac;
1616 int i;
1617
1618 lockdep_assert_held(&mvm->mutex);
1619
1620 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1621 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1622 continue;
1623
1624 ac = iwl_mvm_tid_to_ac_queue(i);
1625 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
1626 vif->hw_queue[ac], i, 0);
1627 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1628 }
1629 }
1630
1631 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1632 struct iwl_mvm_sta *mvm_sta)
1633 {
1634 int i, ret;
1635
1636 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1637 u16 txq_id;
1638
1639 spin_lock_bh(&mvm_sta->lock);
1640 txq_id = mvm_sta->tid_data[i].txq_id;
1641 spin_unlock_bh(&mvm_sta->lock);
1642
1643 if (txq_id == IWL_MVM_INVALID_QUEUE)
1644 continue;
1645
1646 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1647 if (ret)
1648 break;
1649 }
1650
1651 return ret;
1652 }
1653
1654 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1655 struct ieee80211_vif *vif,
1656 struct ieee80211_sta *sta)
1657 {
1658 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1659 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1660 u8 sta_id = mvm_sta->sta_id;
1661 int ret;
1662
1663 lockdep_assert_held(&mvm->mutex);
1664
1665 if (iwl_mvm_has_new_rx_api(mvm))
1666 kfree(mvm_sta->dup_data);
1667
1668 if ((vif->type == NL80211_IFTYPE_STATION &&
1669 mvmvif->ap_sta_id == sta_id) ||
1670 iwl_mvm_is_dqa_supported(mvm)){
1671 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1672 if (ret)
1673 return ret;
1674 /* flush its queues here since we are freeing mvm_sta */
1675 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false, 0);
1676 if (ret)
1677 return ret;
1678 if (iwl_mvm_has_new_tx_api(mvm)) {
1679 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1680 } else {
1681 u32 q_mask = mvm_sta->tfd_queue_msk;
1682
1683 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1684 q_mask);
1685 }
1686 if (ret)
1687 return ret;
1688 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1689
1690 /* If DQA is supported - the queues can be disabled now */
1691 if (iwl_mvm_is_dqa_supported(mvm)) {
1692 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
1693 /*
1694 * If pending_frames is set at this point - it must be
1695 * driver internal logic error, since queues are empty
1696 * and removed successuly.
1697 * warn on it but set it to 0 anyway to avoid station
1698 * not being removed later in the function
1699 */
1700 WARN_ON(atomic_xchg(&mvm->pending_frames[sta_id], 0));
1701 }
1702
1703 /* If there is a TXQ still marked as reserved - free it */
1704 if (iwl_mvm_is_dqa_supported(mvm) &&
1705 mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1706 u8 reserved_txq = mvm_sta->reserved_queue;
1707 enum iwl_mvm_queue_status *status;
1708
1709 /*
1710 * If no traffic has gone through the reserved TXQ - it
1711 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1712 * should be manually marked as free again
1713 */
1714 spin_lock_bh(&mvm->queue_info_lock);
1715 status = &mvm->queue_info[reserved_txq].status;
1716 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1717 (*status != IWL_MVM_QUEUE_FREE),
1718 "sta_id %d reserved txq %d status %d",
1719 sta_id, reserved_txq, *status)) {
1720 spin_unlock_bh(&mvm->queue_info_lock);
1721 return -EINVAL;
1722 }
1723
1724 *status = IWL_MVM_QUEUE_FREE;
1725 spin_unlock_bh(&mvm->queue_info_lock);
1726 }
1727
1728 if (vif->type == NL80211_IFTYPE_STATION &&
1729 mvmvif->ap_sta_id == sta_id) {
1730 /* if associated - we can't remove the AP STA now */
1731 if (vif->bss_conf.assoc)
1732 return ret;
1733
1734 /* unassoc - go ahead - remove the AP STA now */
1735 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1736
1737 /* clear d0i3_ap_sta_id if no longer relevant */
1738 if (mvm->d0i3_ap_sta_id == sta_id)
1739 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA;
1740 }
1741 }
1742
1743 /*
1744 * This shouldn't happen - the TDLS channel switch should be canceled
1745 * before the STA is removed.
1746 */
1747 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1748 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1749 cancel_delayed_work(&mvm->tdls_cs.dwork);
1750 }
1751
1752 /*
1753 * Make sure that the tx response code sees the station as -EBUSY and
1754 * calls the drain worker.
1755 */
1756 spin_lock_bh(&mvm_sta->lock);
1757
1758 /*
1759 * There are frames pending on the AC queues for this station.
1760 * We need to wait until all the frames are drained...
1761 */
1762 if (atomic_read(&mvm->pending_frames[sta_id])) {
1763 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id],
1764 ERR_PTR(-EBUSY));
1765 spin_unlock_bh(&mvm_sta->lock);
1766
1767 /* disable TDLS sta queues on drain complete */
1768 if (sta->tdls) {
1769 mvm->tfd_drained[sta_id] = mvm_sta->tfd_queue_msk;
1770 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", sta_id);
1771 }
1772
1773 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1774 } else {
1775 spin_unlock_bh(&mvm_sta->lock);
1776
1777 if (!iwl_mvm_is_dqa_supported(mvm) && sta->tdls)
1778 iwl_mvm_tdls_sta_deinit(mvm, sta);
1779
1780 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1781 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1782 }
1783
1784 return ret;
1785 }
1786
1787 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1788 struct ieee80211_vif *vif,
1789 u8 sta_id)
1790 {
1791 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1792
1793 lockdep_assert_held(&mvm->mutex);
1794
1795 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1796 return ret;
1797 }
1798
1799 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1800 struct iwl_mvm_int_sta *sta,
1801 u32 qmask, enum nl80211_iftype iftype,
1802 enum iwl_sta_type type)
1803 {
1804 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1805 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1806 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1807 return -ENOSPC;
1808 }
1809
1810 sta->tfd_queue_msk = qmask;
1811 sta->type = type;
1812
1813 /* put a non-NULL value so iterating over the stations won't stop */
1814 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1815 return 0;
1816 }
1817
1818 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1819 {
1820 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1821 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1822 sta->sta_id = IWL_MVM_INVALID_STA;
1823 }
1824
1825 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1826 struct iwl_mvm_int_sta *sta,
1827 const u8 *addr,
1828 u16 mac_id, u16 color)
1829 {
1830 struct iwl_mvm_add_sta_cmd cmd;
1831 int ret;
1832 u32 status;
1833
1834 lockdep_assert_held(&mvm->mutex);
1835
1836 memset(&cmd, 0, sizeof(cmd));
1837 cmd.sta_id = sta->sta_id;
1838 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1839 color));
1840 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1841 cmd.station_type = sta->type;
1842
1843 if (!iwl_mvm_has_new_tx_api(mvm))
1844 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1845 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1846
1847 if (addr)
1848 memcpy(cmd.addr, addr, ETH_ALEN);
1849
1850 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1851 iwl_mvm_add_sta_cmd_size(mvm),
1852 &cmd, &status);
1853 if (ret)
1854 return ret;
1855
1856 switch (status & IWL_ADD_STA_STATUS_MASK) {
1857 case ADD_STA_SUCCESS:
1858 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1859 return 0;
1860 default:
1861 ret = -EIO;
1862 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1863 status);
1864 break;
1865 }
1866 return ret;
1867 }
1868
1869 static void iwl_mvm_enable_aux_queue(struct iwl_mvm *mvm)
1870 {
1871 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
1872 mvm->cfg->base_params->wd_timeout :
1873 IWL_WATCHDOG_DISABLED;
1874
1875 if (iwl_mvm_has_new_tx_api(mvm)) {
1876 int queue = iwl_mvm_tvqm_enable_txq(mvm, mvm->aux_queue,
1877 mvm->aux_sta.sta_id,
1878 IWL_MAX_TID_COUNT,
1879 wdg_timeout);
1880 mvm->aux_queue = queue;
1881 } else if (iwl_mvm_is_dqa_supported(mvm)) {
1882 struct iwl_trans_txq_scd_cfg cfg = {
1883 .fifo = IWL_MVM_TX_FIFO_MCAST,
1884 .sta_id = mvm->aux_sta.sta_id,
1885 .tid = IWL_MAX_TID_COUNT,
1886 .aggregate = false,
1887 .frame_limit = IWL_FRAME_LIMIT,
1888 };
1889
1890 iwl_mvm_enable_txq(mvm, mvm->aux_queue, mvm->aux_queue, 0, &cfg,
1891 wdg_timeout);
1892 } else {
1893 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
1894 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
1895 }
1896 }
1897
1898 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
1899 {
1900 int ret;
1901
1902 lockdep_assert_held(&mvm->mutex);
1903
1904 /* Allocate aux station and assign to it the aux queue */
1905 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
1906 NL80211_IFTYPE_UNSPECIFIED,
1907 IWL_STA_AUX_ACTIVITY);
1908 if (ret)
1909 return ret;
1910
1911 /* Map Aux queue to fifo - needs to happen before adding Aux station */
1912 if (!iwl_mvm_has_new_tx_api(mvm))
1913 iwl_mvm_enable_aux_queue(mvm);
1914
1915 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
1916 MAC_INDEX_AUX, 0);
1917 if (ret) {
1918 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1919 return ret;
1920 }
1921
1922 /*
1923 * For a000 firmware and on we cannot add queue to a station unknown
1924 * to firmware so enable queue here - after the station was added
1925 */
1926 if (iwl_mvm_has_new_tx_api(mvm))
1927 iwl_mvm_enable_aux_queue(mvm);
1928
1929 return 0;
1930 }
1931
1932 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1933 {
1934 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1935
1936 lockdep_assert_held(&mvm->mutex);
1937 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1938 mvmvif->id, 0);
1939 }
1940
1941 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1942 {
1943 int ret;
1944
1945 lockdep_assert_held(&mvm->mutex);
1946
1947 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1948 if (ret)
1949 IWL_WARN(mvm, "Failed sending remove station\n");
1950
1951 return ret;
1952 }
1953
1954 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1955 {
1956 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1957 }
1958
1959 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1960 {
1961 lockdep_assert_held(&mvm->mutex);
1962
1963 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1964 }
1965
1966 /*
1967 * Send the add station command for the vif's broadcast station.
1968 * Assumes that the station was already allocated.
1969 *
1970 * @mvm: the mvm component
1971 * @vif: the interface to which the broadcast station is added
1972 * @bsta: the broadcast station to add.
1973 */
1974 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1975 {
1976 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1977 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1978 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1979 const u8 *baddr = _baddr;
1980 int queue;
1981 int ret;
1982 unsigned int wdg_timeout =
1983 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1984 struct iwl_trans_txq_scd_cfg cfg = {
1985 .fifo = IWL_MVM_TX_FIFO_VO,
1986 .sta_id = mvmvif->bcast_sta.sta_id,
1987 .tid = IWL_MAX_TID_COUNT,
1988 .aggregate = false,
1989 .frame_limit = IWL_FRAME_LIMIT,
1990 };
1991
1992 lockdep_assert_held(&mvm->mutex);
1993
1994 if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) {
1995 if (vif->type == NL80211_IFTYPE_AP ||
1996 vif->type == NL80211_IFTYPE_ADHOC)
1997 queue = mvm->probe_queue;
1998 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
1999 queue = mvm->p2p_dev_queue;
2000 else if (WARN(1, "Missing required TXQ for adding bcast STA\n"))
2001 return -EINVAL;
2002
2003 bsta->tfd_queue_msk |= BIT(queue);
2004
2005 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0,
2006 &cfg, wdg_timeout);
2007 }
2008
2009 if (vif->type == NL80211_IFTYPE_ADHOC)
2010 baddr = vif->bss_conf.bssid;
2011
2012 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2013 return -ENOSPC;
2014
2015 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2016 mvmvif->id, mvmvif->color);
2017 if (ret)
2018 return ret;
2019
2020 /*
2021 * For a000 firmware and on we cannot add queue to a station unknown
2022 * to firmware so enable queue here - after the station was added
2023 */
2024 if (iwl_mvm_has_new_tx_api(mvm)) {
2025 queue = iwl_mvm_tvqm_enable_txq(mvm, vif->hw_queue[0],
2026 bsta->sta_id,
2027 IWL_MAX_TID_COUNT,
2028 wdg_timeout);
2029
2030 if (vif->type == NL80211_IFTYPE_AP ||
2031 vif->type == NL80211_IFTYPE_ADHOC)
2032 mvm->probe_queue = queue;
2033 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2034 mvm->p2p_dev_queue = queue;
2035 }
2036
2037 return 0;
2038 }
2039
2040 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2041 struct ieee80211_vif *vif)
2042 {
2043 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2044 int queue;
2045
2046 lockdep_assert_held(&mvm->mutex);
2047
2048 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 0);
2049
2050 switch (vif->type) {
2051 case NL80211_IFTYPE_AP:
2052 case NL80211_IFTYPE_ADHOC:
2053 queue = mvm->probe_queue;
2054 break;
2055 case NL80211_IFTYPE_P2P_DEVICE:
2056 queue = mvm->p2p_dev_queue;
2057 break;
2058 default:
2059 WARN(1, "Can't free bcast queue on vif type %d\n",
2060 vif->type);
2061 return;
2062 }
2063
2064 iwl_mvm_disable_txq(mvm, queue, vif->hw_queue[0], IWL_MAX_TID_COUNT, 0);
2065 if (iwl_mvm_has_new_tx_api(mvm))
2066 return;
2067
2068 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2069 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2070 }
2071
2072 /* Send the FW a request to remove the station from it's internal data
2073 * structures, but DO NOT remove the entry from the local data structures. */
2074 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2075 {
2076 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2077 int ret;
2078
2079 lockdep_assert_held(&mvm->mutex);
2080
2081 if (iwl_mvm_is_dqa_supported(mvm))
2082 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2083
2084 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2085 if (ret)
2086 IWL_WARN(mvm, "Failed sending remove station\n");
2087 return ret;
2088 }
2089
2090 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2091 {
2092 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2093 u32 qmask = 0;
2094
2095 lockdep_assert_held(&mvm->mutex);
2096
2097 if (!iwl_mvm_is_dqa_supported(mvm)) {
2098 qmask = iwl_mvm_mac_get_queues_mask(vif);
2099
2100 /*
2101 * The firmware defines the TFD queue mask to only be relevant
2102 * for *unicast* queues, so the multicast (CAB) queue shouldn't
2103 * be included. This only happens in NL80211_IFTYPE_AP vif type,
2104 * so the next line will only have an effect there.
2105 */
2106 qmask &= ~BIT(vif->cab_queue);
2107 }
2108
2109 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
2110 ieee80211_vif_type_p2p(vif),
2111 IWL_STA_GENERAL_PURPOSE);
2112 }
2113
2114 /* Allocate a new station entry for the broadcast station to the given vif,
2115 * and send it to the FW.
2116 * Note that each P2P mac should have its own broadcast station.
2117 *
2118 * @mvm: the mvm component
2119 * @vif: the interface to which the broadcast station is added
2120 * @bsta: the broadcast station to add. */
2121 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2122 {
2123 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2124 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2125 int ret;
2126
2127 lockdep_assert_held(&mvm->mutex);
2128
2129 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2130 if (ret)
2131 return ret;
2132
2133 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2134
2135 if (ret)
2136 iwl_mvm_dealloc_int_sta(mvm, bsta);
2137
2138 return ret;
2139 }
2140
2141 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2142 {
2143 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2144
2145 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2146 }
2147
2148 /*
2149 * Send the FW a request to remove the station from it's internal data
2150 * structures, and in addition remove it from the local data structure.
2151 */
2152 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2153 {
2154 int ret;
2155
2156 lockdep_assert_held(&mvm->mutex);
2157
2158 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2159
2160 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2161
2162 return ret;
2163 }
2164
2165 /*
2166 * Allocate a new station entry for the multicast station to the given vif,
2167 * and send it to the FW.
2168 * Note that each AP/GO mac should have its own multicast station.
2169 *
2170 * @mvm: the mvm component
2171 * @vif: the interface to which the multicast station is added
2172 */
2173 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2174 {
2175 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2176 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2177 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2178 const u8 *maddr = _maddr;
2179 struct iwl_trans_txq_scd_cfg cfg = {
2180 .fifo = IWL_MVM_TX_FIFO_MCAST,
2181 .sta_id = msta->sta_id,
2182 .tid = IWL_MAX_TID_COUNT,
2183 .aggregate = false,
2184 .frame_limit = IWL_FRAME_LIMIT,
2185 };
2186 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2187 int ret;
2188
2189 lockdep_assert_held(&mvm->mutex);
2190
2191 if (!iwl_mvm_is_dqa_supported(mvm))
2192 return 0;
2193
2194 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2195 vif->type != NL80211_IFTYPE_ADHOC))
2196 return -ENOTSUPP;
2197
2198 /*
2199 * While in previous FWs we had to exclude cab queue from TFD queue
2200 * mask, now it is needed as any other queue.
2201 */
2202 if (!iwl_mvm_has_new_tx_api(mvm) &&
2203 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2204 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2205 &cfg, timeout);
2206 msta->tfd_queue_msk |= BIT(vif->cab_queue);
2207 }
2208 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2209 mvmvif->id, mvmvif->color);
2210 if (ret) {
2211 iwl_mvm_dealloc_int_sta(mvm, msta);
2212 return ret;
2213 }
2214
2215 /*
2216 * Enable cab queue after the ADD_STA command is sent.
2217 * This is needed for a000 firmware which won't accept SCD_QUEUE_CFG
2218 * command with unknown station id, and for FW that doesn't support
2219 * station API since the cab queue is not included in the
2220 * tfd_queue_mask.
2221 */
2222 if (iwl_mvm_has_new_tx_api(mvm)) {
2223 int queue = iwl_mvm_tvqm_enable_txq(mvm, vif->cab_queue,
2224 msta->sta_id,
2225 IWL_MAX_TID_COUNT,
2226 timeout);
2227 mvmvif->cab_queue = queue;
2228 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2229 IWL_UCODE_TLV_API_STA_TYPE)) {
2230 /*
2231 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2232 * invalid, so make sure we use the queue we want.
2233 * Note that this is done here as we want to avoid making DQA
2234 * changes in mac80211 layer.
2235 */
2236 if (vif->type == NL80211_IFTYPE_ADHOC) {
2237 vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2238 mvmvif->cab_queue = vif->cab_queue;
2239 }
2240 iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0,
2241 &cfg, timeout);
2242 }
2243
2244 return 0;
2245 }
2246
2247 /*
2248 * Send the FW a request to remove the station from it's internal data
2249 * structures, and in addition remove it from the local data structure.
2250 */
2251 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2252 {
2253 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2254 int ret;
2255
2256 lockdep_assert_held(&mvm->mutex);
2257
2258 if (!iwl_mvm_is_dqa_supported(mvm))
2259 return 0;
2260
2261 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true, 0);
2262
2263 iwl_mvm_disable_txq(mvm, mvmvif->cab_queue, vif->cab_queue,
2264 IWL_MAX_TID_COUNT, 0);
2265
2266 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2267 if (ret)
2268 IWL_WARN(mvm, "Failed sending remove station\n");
2269
2270 return ret;
2271 }
2272
2273 #define IWL_MAX_RX_BA_SESSIONS 16
2274
2275 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2276 {
2277 struct iwl_mvm_delba_notif notif = {
2278 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2279 .metadata.sync = 1,
2280 .delba.baid = baid,
2281 };
2282 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
2283 };
2284
2285 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2286 struct iwl_mvm_baid_data *data)
2287 {
2288 int i;
2289
2290 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2291
2292 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2293 int j;
2294 struct iwl_mvm_reorder_buffer *reorder_buf =
2295 &data->reorder_buf[i];
2296
2297 spin_lock_bh(&reorder_buf->lock);
2298 if (likely(!reorder_buf->num_stored)) {
2299 spin_unlock_bh(&reorder_buf->lock);
2300 continue;
2301 }
2302
2303 /*
2304 * This shouldn't happen in regular DELBA since the internal
2305 * delBA notification should trigger a release of all frames in
2306 * the reorder buffer.
2307 */
2308 WARN_ON(1);
2309
2310 for (j = 0; j < reorder_buf->buf_size; j++)
2311 __skb_queue_purge(&reorder_buf->entries[j]);
2312 /*
2313 * Prevent timer re-arm. This prevents a very far fetched case
2314 * where we timed out on the notification. There may be prior
2315 * RX frames pending in the RX queue before the notification
2316 * that might get processed between now and the actual deletion
2317 * and we would re-arm the timer although we are deleting the
2318 * reorder buffer.
2319 */
2320 reorder_buf->removed = true;
2321 spin_unlock_bh(&reorder_buf->lock);
2322 del_timer_sync(&reorder_buf->reorder_timer);
2323 }
2324 }
2325
2326 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2327 u32 sta_id,
2328 struct iwl_mvm_baid_data *data,
2329 u16 ssn, u8 buf_size)
2330 {
2331 int i;
2332
2333 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2334 struct iwl_mvm_reorder_buffer *reorder_buf =
2335 &data->reorder_buf[i];
2336 int j;
2337
2338 reorder_buf->num_stored = 0;
2339 reorder_buf->head_sn = ssn;
2340 reorder_buf->buf_size = buf_size;
2341 /* rx reorder timer */
2342 reorder_buf->reorder_timer.function =
2343 iwl_mvm_reorder_timer_expired;
2344 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
2345 init_timer(&reorder_buf->reorder_timer);
2346 spin_lock_init(&reorder_buf->lock);
2347 reorder_buf->mvm = mvm;
2348 reorder_buf->queue = i;
2349 reorder_buf->sta_id = sta_id;
2350 reorder_buf->valid = false;
2351 for (j = 0; j < reorder_buf->buf_size; j++)
2352 __skb_queue_head_init(&reorder_buf->entries[j]);
2353 }
2354 }
2355
2356 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2357 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
2358 {
2359 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2360 struct iwl_mvm_add_sta_cmd cmd = {};
2361 struct iwl_mvm_baid_data *baid_data = NULL;
2362 int ret;
2363 u32 status;
2364
2365 lockdep_assert_held(&mvm->mutex);
2366
2367 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2368 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2369 return -ENOSPC;
2370 }
2371
2372 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2373 /*
2374 * Allocate here so if allocation fails we can bail out early
2375 * before starting the BA session in the firmware
2376 */
2377 baid_data = kzalloc(sizeof(*baid_data) +
2378 mvm->trans->num_rx_queues *
2379 sizeof(baid_data->reorder_buf[0]),
2380 GFP_KERNEL);
2381 if (!baid_data)
2382 return -ENOMEM;
2383 }
2384
2385 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2386 cmd.sta_id = mvm_sta->sta_id;
2387 cmd.add_modify = STA_MODE_MODIFY;
2388 if (start) {
2389 cmd.add_immediate_ba_tid = (u8) tid;
2390 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2391 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
2392 } else {
2393 cmd.remove_immediate_ba_tid = (u8) tid;
2394 }
2395 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2396 STA_MODIFY_REMOVE_BA_TID;
2397
2398 status = ADD_STA_SUCCESS;
2399 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2400 iwl_mvm_add_sta_cmd_size(mvm),
2401 &cmd, &status);
2402 if (ret)
2403 goto out_free;
2404
2405 switch (status & IWL_ADD_STA_STATUS_MASK) {
2406 case ADD_STA_SUCCESS:
2407 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2408 start ? "start" : "stopp");
2409 break;
2410 case ADD_STA_IMMEDIATE_BA_FAILURE:
2411 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2412 ret = -ENOSPC;
2413 break;
2414 default:
2415 ret = -EIO;
2416 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2417 start ? "start" : "stopp", status);
2418 break;
2419 }
2420
2421 if (ret)
2422 goto out_free;
2423
2424 if (start) {
2425 u8 baid;
2426
2427 mvm->rx_ba_sessions++;
2428
2429 if (!iwl_mvm_has_new_rx_api(mvm))
2430 return 0;
2431
2432 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2433 ret = -EINVAL;
2434 goto out_free;
2435 }
2436 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2437 IWL_ADD_STA_BAID_SHIFT);
2438 baid_data->baid = baid;
2439 baid_data->timeout = timeout;
2440 baid_data->last_rx = jiffies;
2441 setup_timer(&baid_data->session_timer,
2442 iwl_mvm_rx_agg_session_expired,
2443 (unsigned long)&mvm->baid_map[baid]);
2444 baid_data->mvm = mvm;
2445 baid_data->tid = tid;
2446 baid_data->sta_id = mvm_sta->sta_id;
2447
2448 mvm_sta->tid_to_baid[tid] = baid;
2449 if (timeout)
2450 mod_timer(&baid_data->session_timer,
2451 TU_TO_EXP_TIME(timeout * 2));
2452
2453 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
2454 baid_data, ssn, buf_size);
2455 /*
2456 * protect the BA data with RCU to cover a case where our
2457 * internal RX sync mechanism will timeout (not that it's
2458 * supposed to happen) and we will free the session data while
2459 * RX is being processed in parallel
2460 */
2461 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2462 mvm_sta->sta_id, tid, baid);
2463 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2464 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2465 } else {
2466 u8 baid = mvm_sta->tid_to_baid[tid];
2467
2468 if (mvm->rx_ba_sessions > 0)
2469 /* check that restart flow didn't zero the counter */
2470 mvm->rx_ba_sessions--;
2471 if (!iwl_mvm_has_new_rx_api(mvm))
2472 return 0;
2473
2474 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2475 return -EINVAL;
2476
2477 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2478 if (WARN_ON(!baid_data))
2479 return -EINVAL;
2480
2481 /* synchronize all rx queues so we can safely delete */
2482 iwl_mvm_free_reorder(mvm, baid_data);
2483 del_timer_sync(&baid_data->session_timer);
2484 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2485 kfree_rcu(baid_data, rcu_head);
2486 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2487 }
2488 return 0;
2489
2490 out_free:
2491 kfree(baid_data);
2492 return ret;
2493 }
2494
2495 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2496 int tid, u8 queue, bool start)
2497 {
2498 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2499 struct iwl_mvm_add_sta_cmd cmd = {};
2500 int ret;
2501 u32 status;
2502
2503 lockdep_assert_held(&mvm->mutex);
2504
2505 if (start) {
2506 mvm_sta->tfd_queue_msk |= BIT(queue);
2507 mvm_sta->tid_disable_agg &= ~BIT(tid);
2508 } else {
2509 /* In DQA-mode the queue isn't removed on agg termination */
2510 if (!iwl_mvm_is_dqa_supported(mvm))
2511 mvm_sta->tfd_queue_msk &= ~BIT(queue);
2512 mvm_sta->tid_disable_agg |= BIT(tid);
2513 }
2514
2515 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2516 cmd.sta_id = mvm_sta->sta_id;
2517 cmd.add_modify = STA_MODE_MODIFY;
2518 if (!iwl_mvm_has_new_tx_api(mvm))
2519 cmd.modify_mask = STA_MODIFY_QUEUES;
2520 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2521 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2522 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2523
2524 status = ADD_STA_SUCCESS;
2525 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2526 iwl_mvm_add_sta_cmd_size(mvm),
2527 &cmd, &status);
2528 if (ret)
2529 return ret;
2530
2531 switch (status & IWL_ADD_STA_STATUS_MASK) {
2532 case ADD_STA_SUCCESS:
2533 break;
2534 default:
2535 ret = -EIO;
2536 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2537 start ? "start" : "stopp", status);
2538 break;
2539 }
2540
2541 return ret;
2542 }
2543
2544 const u8 tid_to_mac80211_ac[] = {
2545 IEEE80211_AC_BE,
2546 IEEE80211_AC_BK,
2547 IEEE80211_AC_BK,
2548 IEEE80211_AC_BE,
2549 IEEE80211_AC_VI,
2550 IEEE80211_AC_VI,
2551 IEEE80211_AC_VO,
2552 IEEE80211_AC_VO,
2553 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2554 };
2555
2556 static const u8 tid_to_ucode_ac[] = {
2557 AC_BE,
2558 AC_BK,
2559 AC_BK,
2560 AC_BE,
2561 AC_VI,
2562 AC_VI,
2563 AC_VO,
2564 AC_VO,
2565 };
2566
2567 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2568 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2569 {
2570 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2571 struct iwl_mvm_tid_data *tid_data;
2572 u16 normalized_ssn;
2573 int txq_id;
2574 int ret;
2575
2576 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2577 return -EINVAL;
2578
2579 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2580 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
2581 mvmsta->tid_data[tid].state);
2582 return -ENXIO;
2583 }
2584
2585 lockdep_assert_held(&mvm->mutex);
2586
2587 spin_lock_bh(&mvmsta->lock);
2588
2589 /* possible race condition - we entered D0i3 while starting agg */
2590 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
2591 spin_unlock_bh(&mvmsta->lock);
2592 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
2593 return -EIO;
2594 }
2595
2596 spin_lock(&mvm->queue_info_lock);
2597
2598 /*
2599 * Note the possible cases:
2600 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
2601 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
2602 * one and mark it as reserved
2603 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
2604 * non-DQA mode, since the TXQ hasn't yet been allocated
2605 * Don't support case 3 for new TX path as it is not expected to happen
2606 * and aggregation will be offloaded soon anyway
2607 */
2608 txq_id = mvmsta->tid_data[tid].txq_id;
2609 if (iwl_mvm_has_new_tx_api(mvm)) {
2610 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2611 ret = -ENXIO;
2612 goto release_locks;
2613 }
2614 } else if (iwl_mvm_is_dqa_supported(mvm) &&
2615 unlikely(mvm->queue_info[txq_id].status ==
2616 IWL_MVM_QUEUE_SHARED)) {
2617 ret = -ENXIO;
2618 IWL_DEBUG_TX_QUEUES(mvm,
2619 "Can't start tid %d agg on shared queue!\n",
2620 tid);
2621 goto release_locks;
2622 } else if (!iwl_mvm_is_dqa_supported(mvm) ||
2623 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
2624 txq_id = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2625 mvm->first_agg_queue,
2626 mvm->last_agg_queue);
2627 if (txq_id < 0) {
2628 ret = txq_id;
2629 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2630 goto release_locks;
2631 }
2632 /*
2633 * TXQ shouldn't be in inactive mode for non-DQA, so getting
2634 * an inactive queue from iwl_mvm_find_free_queue() is
2635 * certainly a bug
2636 */
2637 WARN_ON(mvm->queue_info[txq_id].status ==
2638 IWL_MVM_QUEUE_INACTIVE);
2639
2640 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2641 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2642 }
2643
2644 spin_unlock(&mvm->queue_info_lock);
2645
2646 IWL_DEBUG_TX_QUEUES(mvm,
2647 "AGG for tid %d will be on queue #%d\n",
2648 tid, txq_id);
2649
2650 tid_data = &mvmsta->tid_data[tid];
2651 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2652 tid_data->txq_id = txq_id;
2653 *ssn = tid_data->ssn;
2654
2655 IWL_DEBUG_TX_QUEUES(mvm,
2656 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2657 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2658 tid_data->next_reclaimed);
2659
2660 /*
2661 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
2662 * to align the wrap around of ssn so we compare relevant values.
2663 */
2664 normalized_ssn = tid_data->ssn;
2665 if (mvm->trans->cfg->gen2)
2666 normalized_ssn &= 0xff;
2667
2668 if (normalized_ssn == tid_data->next_reclaimed) {
2669 tid_data->state = IWL_AGG_STARTING;
2670 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2671 } else {
2672 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2673 }
2674
2675 ret = 0;
2676 goto out;
2677
2678 release_locks:
2679 spin_unlock(&mvm->queue_info_lock);
2680 out:
2681 spin_unlock_bh(&mvmsta->lock);
2682
2683 return ret;
2684 }
2685
2686 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2687 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
2688 bool amsdu)
2689 {
2690 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2691 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2692 unsigned int wdg_timeout =
2693 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2694 int queue, ret;
2695 bool alloc_queue = true;
2696 enum iwl_mvm_queue_status queue_status;
2697 u16 ssn;
2698
2699 struct iwl_trans_txq_scd_cfg cfg = {
2700 .sta_id = mvmsta->sta_id,
2701 .tid = tid,
2702 .frame_limit = buf_size,
2703 .aggregate = true,
2704 };
2705
2706 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2707 != IWL_MAX_TID_COUNT);
2708
2709 if (!mvm->trans->cfg->gen2)
2710 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
2711 else
2712 buf_size = min_t(int, buf_size,
2713 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF);
2714
2715 spin_lock_bh(&mvmsta->lock);
2716 ssn = tid_data->ssn;
2717 queue = tid_data->txq_id;
2718 tid_data->state = IWL_AGG_ON;
2719 mvmsta->agg_tids |= BIT(tid);
2720 tid_data->ssn = 0xffff;
2721 tid_data->amsdu_in_ampdu_allowed = amsdu;
2722 spin_unlock_bh(&mvmsta->lock);
2723
2724 if (iwl_mvm_has_new_tx_api(mvm)) {
2725 /*
2726 * If no queue iwl_mvm_sta_tx_agg_start() would have failed so
2727 * no need to check queue's status
2728 */
2729 if (buf_size < mvmsta->max_agg_bufsize)
2730 return -ENOTSUPP;
2731
2732 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2733 if (ret)
2734 return -EIO;
2735 goto out;
2736 }
2737
2738 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2739
2740 spin_lock_bh(&mvm->queue_info_lock);
2741 queue_status = mvm->queue_info[queue].status;
2742 spin_unlock_bh(&mvm->queue_info_lock);
2743
2744 /* In DQA mode, the existing queue might need to be reconfigured */
2745 if (iwl_mvm_is_dqa_supported(mvm)) {
2746 /* Maybe there is no need to even alloc a queue... */
2747 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2748 alloc_queue = false;
2749
2750 /*
2751 * Only reconfig the SCD for the queue if the window size has
2752 * changed from current (become smaller)
2753 */
2754 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
2755 /*
2756 * If reconfiguring an existing queue, it first must be
2757 * drained
2758 */
2759 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2760 BIT(queue));
2761 if (ret) {
2762 IWL_ERR(mvm,
2763 "Error draining queue before reconfig\n");
2764 return ret;
2765 }
2766
2767 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2768 mvmsta->sta_id, tid,
2769 buf_size, ssn);
2770 if (ret) {
2771 IWL_ERR(mvm,
2772 "Error reconfiguring TXQ #%d\n", queue);
2773 return ret;
2774 }
2775 }
2776 }
2777
2778 if (alloc_queue)
2779 iwl_mvm_enable_txq(mvm, queue,
2780 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
2781 &cfg, wdg_timeout);
2782
2783 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2784 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2785 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2786 if (ret)
2787 return -EIO;
2788 }
2789
2790 /* No need to mark as reserved */
2791 spin_lock_bh(&mvm->queue_info_lock);
2792 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2793 spin_unlock_bh(&mvm->queue_info_lock);
2794
2795 out:
2796 /*
2797 * Even though in theory the peer could have different
2798 * aggregation reorder buffer sizes for different sessions,
2799 * our ucode doesn't allow for that and has a global limit
2800 * for each station. Therefore, use the minimum of all the
2801 * aggregation sessions and our default value.
2802 */
2803 mvmsta->max_agg_bufsize =
2804 min(mvmsta->max_agg_bufsize, buf_size);
2805 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2806
2807 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2808 sta->addr, tid);
2809
2810 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
2811 }
2812
2813 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2814 struct iwl_mvm_sta *mvmsta,
2815 u16 txq_id)
2816 {
2817 if (iwl_mvm_has_new_tx_api(mvm))
2818 return;
2819
2820 spin_lock_bh(&mvm->queue_info_lock);
2821 /*
2822 * The TXQ is marked as reserved only if no traffic came through yet
2823 * This means no traffic has been sent on this TID (agg'd or not), so
2824 * we no longer have use for the queue. Since it hasn't even been
2825 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
2826 * free.
2827 */
2828 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
2829 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
2830
2831 spin_unlock_bh(&mvm->queue_info_lock);
2832 }
2833
2834 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2835 struct ieee80211_sta *sta, u16 tid)
2836 {
2837 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2838 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2839 u16 txq_id;
2840 int err;
2841
2842 /*
2843 * If mac80211 is cleaning its state, then say that we finished since
2844 * our state has been cleared anyway.
2845 */
2846 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
2847 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2848 return 0;
2849 }
2850
2851 spin_lock_bh(&mvmsta->lock);
2852
2853 txq_id = tid_data->txq_id;
2854
2855 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
2856 mvmsta->sta_id, tid, txq_id, tid_data->state);
2857
2858 mvmsta->agg_tids &= ~BIT(tid);
2859
2860 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2861
2862 switch (tid_data->state) {
2863 case IWL_AGG_ON:
2864 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2865
2866 IWL_DEBUG_TX_QUEUES(mvm,
2867 "ssn = %d, next_recl = %d\n",
2868 tid_data->ssn, tid_data->next_reclaimed);
2869
2870 /*
2871 * There are still packets for this RA / TID in the HW.
2872 * Not relevant for DQA mode, since there is no need to disable
2873 * the queue.
2874 */
2875 if (!iwl_mvm_is_dqa_supported(mvm) &&
2876 tid_data->ssn != tid_data->next_reclaimed) {
2877 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
2878 err = 0;
2879 break;
2880 }
2881
2882 tid_data->ssn = 0xffff;
2883 tid_data->state = IWL_AGG_OFF;
2884 spin_unlock_bh(&mvmsta->lock);
2885
2886 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2887
2888 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2889
2890 if (!iwl_mvm_is_dqa_supported(mvm)) {
2891 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2892
2893 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
2894 }
2895 return 0;
2896 case IWL_AGG_STARTING:
2897 case IWL_EMPTYING_HW_QUEUE_ADDBA:
2898 /*
2899 * The agg session has been stopped before it was set up. This
2900 * can happen when the AddBA timer times out for example.
2901 */
2902
2903 /* No barriers since we are under mutex */
2904 lockdep_assert_held(&mvm->mutex);
2905
2906 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2907 tid_data->state = IWL_AGG_OFF;
2908 err = 0;
2909 break;
2910 default:
2911 IWL_ERR(mvm,
2912 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
2913 mvmsta->sta_id, tid, tid_data->state);
2914 IWL_ERR(mvm,
2915 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
2916 err = -EINVAL;
2917 }
2918
2919 spin_unlock_bh(&mvmsta->lock);
2920
2921 return err;
2922 }
2923
2924 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2925 struct ieee80211_sta *sta, u16 tid)
2926 {
2927 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2928 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2929 u16 txq_id;
2930 enum iwl_mvm_agg_state old_state;
2931
2932 /*
2933 * First set the agg state to OFF to avoid calling
2934 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
2935 */
2936 spin_lock_bh(&mvmsta->lock);
2937 txq_id = tid_data->txq_id;
2938 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
2939 mvmsta->sta_id, tid, txq_id, tid_data->state);
2940 old_state = tid_data->state;
2941 tid_data->state = IWL_AGG_OFF;
2942 mvmsta->agg_tids &= ~BIT(tid);
2943 spin_unlock_bh(&mvmsta->lock);
2944
2945 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, txq_id);
2946
2947 if (old_state >= IWL_AGG_ON) {
2948 iwl_mvm_drain_sta(mvm, mvmsta, true);
2949
2950 if (iwl_mvm_has_new_tx_api(mvm)) {
2951 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
2952 BIT(tid), 0))
2953 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2954 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2955 } else {
2956 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
2957 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
2958 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
2959 }
2960
2961 iwl_mvm_drain_sta(mvm, mvmsta, false);
2962
2963 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
2964
2965 if (!iwl_mvm_is_dqa_supported(mvm)) {
2966 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
2967
2968 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
2969 tid, 0);
2970 }
2971 }
2972
2973 return 0;
2974 }
2975
2976 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
2977 {
2978 int i, max = -1, max_offs = -1;
2979
2980 lockdep_assert_held(&mvm->mutex);
2981
2982 /* Pick the unused key offset with the highest 'deleted'
2983 * counter. Every time a key is deleted, all the counters
2984 * are incremented and the one that was just deleted is
2985 * reset to zero. Thus, the highest counter is the one
2986 * that was deleted longest ago. Pick that one.
2987 */
2988 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2989 if (test_bit(i, mvm->fw_key_table))
2990 continue;
2991 if (mvm->fw_key_deleted[i] > max) {
2992 max = mvm->fw_key_deleted[i];
2993 max_offs = i;
2994 }
2995 }
2996
2997 if (max_offs < 0)
2998 return STA_KEY_IDX_INVALID;
2999
3000 return max_offs;
3001 }
3002
3003 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3004 struct ieee80211_vif *vif,
3005 struct ieee80211_sta *sta)
3006 {
3007 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3008
3009 if (sta)
3010 return iwl_mvm_sta_from_mac80211(sta);
3011
3012 /*
3013 * The device expects GTKs for station interfaces to be
3014 * installed as GTKs for the AP station. If we have no
3015 * station ID, then use AP's station ID.
3016 */
3017 if (vif->type == NL80211_IFTYPE_STATION &&
3018 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3019 u8 sta_id = mvmvif->ap_sta_id;
3020
3021 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3022 lockdep_is_held(&mvm->mutex));
3023
3024 /*
3025 * It is possible that the 'sta' parameter is NULL,
3026 * for example when a GTK is removed - the sta_id will then
3027 * be the AP ID, and no station was passed by mac80211.
3028 */
3029 if (IS_ERR_OR_NULL(sta))
3030 return NULL;
3031
3032 return iwl_mvm_sta_from_mac80211(sta);
3033 }
3034
3035 return NULL;
3036 }
3037
3038 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3039 u32 sta_id,
3040 struct ieee80211_key_conf *key, bool mcast,
3041 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3042 u8 key_offset)
3043 {
3044 union {
3045 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3046 struct iwl_mvm_add_sta_key_cmd cmd;
3047 } u = {};
3048 __le16 key_flags;
3049 int ret;
3050 u32 status;
3051 u16 keyidx;
3052 u64 pn = 0;
3053 int i, size;
3054 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3055 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3056
3057 if (sta_id == IWL_MVM_INVALID_STA)
3058 return -EINVAL;
3059
3060 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3061 STA_KEY_FLG_KEYID_MSK;
3062 key_flags = cpu_to_le16(keyidx);
3063 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3064
3065 switch (key->cipher) {
3066 case WLAN_CIPHER_SUITE_TKIP:
3067 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3068 if (new_api) {
3069 memcpy((void *)&u.cmd.tx_mic_key,
3070 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3071 IWL_MIC_KEY_SIZE);
3072
3073 memcpy((void *)&u.cmd.rx_mic_key,
3074 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3075 IWL_MIC_KEY_SIZE);
3076 pn = atomic64_read(&key->tx_pn);
3077
3078 } else {
3079 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3080 for (i = 0; i < 5; i++)
3081 u.cmd_v1.tkip_rx_ttak[i] =
3082 cpu_to_le16(tkip_p1k[i]);
3083 }
3084 memcpy(u.cmd.common.key, key->key, key->keylen);
3085 break;
3086 case WLAN_CIPHER_SUITE_CCMP:
3087 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3088 memcpy(u.cmd.common.key, key->key, key->keylen);
3089 if (new_api)
3090 pn = atomic64_read(&key->tx_pn);
3091 break;
3092 case WLAN_CIPHER_SUITE_WEP104:
3093 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3094 /* fall through */
3095 case WLAN_CIPHER_SUITE_WEP40:
3096 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3097 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3098 break;
3099 case WLAN_CIPHER_SUITE_GCMP_256:
3100 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3101 /* fall through */
3102 case WLAN_CIPHER_SUITE_GCMP:
3103 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3104 memcpy(u.cmd.common.key, key->key, key->keylen);
3105 if (new_api)
3106 pn = atomic64_read(&key->tx_pn);
3107 break;
3108 default:
3109 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3110 memcpy(u.cmd.common.key, key->key, key->keylen);
3111 }
3112
3113 if (mcast)
3114 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3115
3116 u.cmd.common.key_offset = key_offset;
3117 u.cmd.common.key_flags = key_flags;
3118 u.cmd.common.sta_id = sta_id;
3119
3120 if (new_api) {
3121 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3122 size = sizeof(u.cmd);
3123 } else {
3124 size = sizeof(u.cmd_v1);
3125 }
3126
3127 status = ADD_STA_SUCCESS;
3128 if (cmd_flags & CMD_ASYNC)
3129 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3130 &u.cmd);
3131 else
3132 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3133 &u.cmd, &status);
3134
3135 switch (status) {
3136 case ADD_STA_SUCCESS:
3137 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3138 break;
3139 default:
3140 ret = -EIO;
3141 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3142 break;
3143 }
3144
3145 return ret;
3146 }
3147
3148 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3149 struct ieee80211_key_conf *keyconf,
3150 u8 sta_id, bool remove_key)
3151 {
3152 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3153
3154 /* verify the key details match the required command's expectations */
3155 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3156 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3157 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3158 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3159 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3160 return -EINVAL;
3161
3162 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3163 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3164 return -EINVAL;
3165
3166 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3167 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3168
3169 if (remove_key) {
3170 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3171 } else {
3172 struct ieee80211_key_seq seq;
3173 const u8 *pn;
3174
3175 switch (keyconf->cipher) {
3176 case WLAN_CIPHER_SUITE_AES_CMAC:
3177 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3178 break;
3179 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3180 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3181 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3182 break;
3183 default:
3184 return -EINVAL;
3185 }
3186
3187 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3188 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3189 igtk_cmd.ctrl_flags |=
3190 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3191 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3192 pn = seq.aes_cmac.pn;
3193 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3194 ((u64) pn[4] << 8) |
3195 ((u64) pn[3] << 16) |
3196 ((u64) pn[2] << 24) |
3197 ((u64) pn[1] << 32) |
3198 ((u64) pn[0] << 40));
3199 }
3200
3201 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3202 remove_key ? "removing" : "installing",
3203 igtk_cmd.sta_id);
3204
3205 if (!iwl_mvm_has_new_rx_api(mvm)) {
3206 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3207 .ctrl_flags = igtk_cmd.ctrl_flags,
3208 .key_id = igtk_cmd.key_id,
3209 .sta_id = igtk_cmd.sta_id,
3210 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3211 };
3212
3213 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3214 ARRAY_SIZE(igtk_cmd_v1.igtk));
3215 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3216 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3217 }
3218 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3219 sizeof(igtk_cmd), &igtk_cmd);
3220 }
3221
3222
3223 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3224 struct ieee80211_vif *vif,
3225 struct ieee80211_sta *sta)
3226 {
3227 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3228
3229 if (sta)
3230 return sta->addr;
3231
3232 if (vif->type == NL80211_IFTYPE_STATION &&
3233 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3234 u8 sta_id = mvmvif->ap_sta_id;
3235 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3236 lockdep_is_held(&mvm->mutex));
3237 return sta->addr;
3238 }
3239
3240
3241 return NULL;
3242 }
3243
3244 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3245 struct ieee80211_vif *vif,
3246 struct ieee80211_sta *sta,
3247 struct ieee80211_key_conf *keyconf,
3248 u8 key_offset,
3249 bool mcast)
3250 {
3251 int ret;
3252 const u8 *addr;
3253 struct ieee80211_key_seq seq;
3254 u16 p1k[5];
3255 u32 sta_id;
3256
3257 if (sta) {
3258 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3259
3260 sta_id = mvm_sta->sta_id;
3261 } else if (vif->type == NL80211_IFTYPE_AP &&
3262 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3263 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3264
3265 sta_id = mvmvif->mcast_sta.sta_id;
3266 } else {
3267 IWL_ERR(mvm, "Failed to find station id\n");
3268 return -EINVAL;
3269 }
3270
3271 switch (keyconf->cipher) {
3272 case WLAN_CIPHER_SUITE_TKIP:
3273 if (vif->type == NL80211_IFTYPE_AP) {
3274 ret = -EINVAL;
3275 break;
3276 }
3277 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3278 /* get phase 1 key from mac80211 */
3279 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3280 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3281 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3282 seq.tkip.iv32, p1k, 0, key_offset);
3283 break;
3284 case WLAN_CIPHER_SUITE_CCMP:
3285 case WLAN_CIPHER_SUITE_WEP40:
3286 case WLAN_CIPHER_SUITE_WEP104:
3287 case WLAN_CIPHER_SUITE_GCMP:
3288 case WLAN_CIPHER_SUITE_GCMP_256:
3289 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3290 0, NULL, 0, key_offset);
3291 break;
3292 default:
3293 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3294 0, NULL, 0, key_offset);
3295 }
3296
3297 return ret;
3298 }
3299
3300 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
3301 struct ieee80211_key_conf *keyconf,
3302 bool mcast)
3303 {
3304 union {
3305 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3306 struct iwl_mvm_add_sta_key_cmd cmd;
3307 } u = {};
3308 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3309 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3310 __le16 key_flags;
3311 int ret, size;
3312 u32 status;
3313
3314 if (sta_id == IWL_MVM_INVALID_STA)
3315 return -EINVAL;
3316
3317 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
3318 STA_KEY_FLG_KEYID_MSK);
3319 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
3320 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
3321
3322 if (mcast)
3323 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3324
3325 /*
3326 * The fields assigned here are in the same location at the start
3327 * of the command, so we can do this union trick.
3328 */
3329 u.cmd.common.key_flags = key_flags;
3330 u.cmd.common.key_offset = keyconf->hw_key_idx;
3331 u.cmd.common.sta_id = sta_id;
3332
3333 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
3334
3335 status = ADD_STA_SUCCESS;
3336 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
3337 &status);
3338
3339 switch (status) {
3340 case ADD_STA_SUCCESS:
3341 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
3342 break;
3343 default:
3344 ret = -EIO;
3345 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
3346 break;
3347 }
3348
3349 return ret;
3350 }
3351
3352 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3353 struct ieee80211_vif *vif,
3354 struct ieee80211_sta *sta,
3355 struct ieee80211_key_conf *keyconf,
3356 u8 key_offset)
3357 {
3358 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3359 struct iwl_mvm_sta *mvm_sta;
3360 u8 sta_id = IWL_MVM_INVALID_STA;
3361 int ret;
3362 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3363
3364 lockdep_assert_held(&mvm->mutex);
3365
3366 if (vif->type != NL80211_IFTYPE_AP ||
3367 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3368 /* Get the station id from the mvm local station table */
3369 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3370 if (!mvm_sta) {
3371 IWL_ERR(mvm, "Failed to find station\n");
3372 return -EINVAL;
3373 }
3374 sta_id = mvm_sta->sta_id;
3375
3376 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3377 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3378 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3379 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
3380 false);
3381 goto end;
3382 }
3383
3384 /*
3385 * It is possible that the 'sta' parameter is NULL, and thus
3386 * there is a need to retrieve the sta from the local station
3387 * table.
3388 */
3389 if (!sta) {
3390 sta = rcu_dereference_protected(
3391 mvm->fw_id_to_mac_id[sta_id],
3392 lockdep_is_held(&mvm->mutex));
3393 if (IS_ERR_OR_NULL(sta)) {
3394 IWL_ERR(mvm, "Invalid station id\n");
3395 return -EINVAL;
3396 }
3397 }
3398
3399 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3400 return -EINVAL;
3401 }
3402
3403 /* If the key_offset is not pre-assigned, we need to find a
3404 * new offset to use. In normal cases, the offset is not
3405 * pre-assigned, but during HW_RESTART we want to reuse the
3406 * same indices, so we pass them when this function is called.
3407 *
3408 * In D3 entry, we need to hardcoded the indices (because the
3409 * firmware hardcodes the PTK offset to 0). In this case, we
3410 * need to make sure we don't overwrite the hw_key_idx in the
3411 * keyconf structure, because otherwise we cannot configure
3412 * the original ones back when resuming.
3413 */
3414 if (key_offset == STA_KEY_IDX_INVALID) {
3415 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3416 if (key_offset == STA_KEY_IDX_INVALID)
3417 return -ENOSPC;
3418 keyconf->hw_key_idx = key_offset;
3419 }
3420
3421 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3422 if (ret)
3423 goto end;
3424
3425 /*
3426 * For WEP, the same key is used for multicast and unicast. Upload it
3427 * again, using the same key offset, and now pointing the other one
3428 * to the same key slot (offset).
3429 * If this fails, remove the original as well.
3430 */
3431 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3432 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3433 sta) {
3434 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3435 key_offset, !mcast);
3436 if (ret) {
3437 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3438 goto end;
3439 }
3440 }
3441
3442 __set_bit(key_offset, mvm->fw_key_table);
3443
3444 end:
3445 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3446 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3447 sta ? sta->addr : zero_addr, ret);
3448 return ret;
3449 }
3450
3451 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3452 struct ieee80211_vif *vif,
3453 struct ieee80211_sta *sta,
3454 struct ieee80211_key_conf *keyconf)
3455 {
3456 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3457 struct iwl_mvm_sta *mvm_sta;
3458 u8 sta_id = IWL_MVM_INVALID_STA;
3459 int ret, i;
3460
3461 lockdep_assert_held(&mvm->mutex);
3462
3463 /* Get the station from the mvm local station table */
3464 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3465 if (mvm_sta)
3466 sta_id = mvm_sta->sta_id;
3467 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3468 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3469
3470
3471 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3472 keyconf->keyidx, sta_id);
3473
3474 if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3475 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3476 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
3477 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3478
3479 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3480 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3481 keyconf->hw_key_idx);
3482 return -ENOENT;
3483 }
3484
3485 /* track which key was deleted last */
3486 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3487 if (mvm->fw_key_deleted[i] < U8_MAX)
3488 mvm->fw_key_deleted[i]++;
3489 }
3490 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3491
3492 if (sta && !mvm_sta) {
3493 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3494 return 0;
3495 }
3496
3497 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3498 if (ret)
3499 return ret;
3500
3501 /* delete WEP key twice to get rid of (now useless) offset */
3502 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3503 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3504 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3505
3506 return ret;
3507 }
3508
3509 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3510 struct ieee80211_vif *vif,
3511 struct ieee80211_key_conf *keyconf,
3512 struct ieee80211_sta *sta, u32 iv32,
3513 u16 *phase1key)
3514 {
3515 struct iwl_mvm_sta *mvm_sta;
3516 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3517
3518 rcu_read_lock();
3519
3520 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3521 if (WARN_ON_ONCE(!mvm_sta))
3522 goto unlock;
3523 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3524 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
3525
3526 unlock:
3527 rcu_read_unlock();
3528 }
3529
3530 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3531 struct ieee80211_sta *sta)
3532 {
3533 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3534 struct iwl_mvm_add_sta_cmd cmd = {
3535 .add_modify = STA_MODE_MODIFY,
3536 .sta_id = mvmsta->sta_id,
3537 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3538 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3539 };
3540 int ret;
3541
3542 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3543 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3544 if (ret)
3545 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3546 }
3547
3548 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3549 struct ieee80211_sta *sta,
3550 enum ieee80211_frame_release_type reason,
3551 u16 cnt, u16 tids, bool more_data,
3552 bool single_sta_queue)
3553 {
3554 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3555 struct iwl_mvm_add_sta_cmd cmd = {
3556 .add_modify = STA_MODE_MODIFY,
3557 .sta_id = mvmsta->sta_id,
3558 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3559 .sleep_tx_count = cpu_to_le16(cnt),
3560 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3561 };
3562 int tid, ret;
3563 unsigned long _tids = tids;
3564
3565 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3566 * Note that this field is reserved and unused by firmware not
3567 * supporting GO uAPSD, so it's safe to always do this.
3568 */
3569 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3570 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3571
3572 /* If we're releasing frames from aggregation or dqa queues then check
3573 * if all the queues that we're releasing frames from, combined, have:
3574 * - more frames than the service period, in which case more_data
3575 * needs to be set
3576 * - fewer than 'cnt' frames, in which case we need to adjust the
3577 * firmware command (but do that unconditionally)
3578 */
3579 if (single_sta_queue) {
3580 int remaining = cnt;
3581 int sleep_tx_count;
3582
3583 spin_lock_bh(&mvmsta->lock);
3584 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3585 struct iwl_mvm_tid_data *tid_data;
3586 u16 n_queued;
3587
3588 tid_data = &mvmsta->tid_data[tid];
3589 if (WARN(!iwl_mvm_is_dqa_supported(mvm) &&
3590 tid_data->state != IWL_AGG_ON &&
3591 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
3592 "TID %d state is %d\n",
3593 tid, tid_data->state)) {
3594 spin_unlock_bh(&mvmsta->lock);
3595 ieee80211_sta_eosp(sta);
3596 return;
3597 }
3598
3599 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3600 if (n_queued > remaining) {
3601 more_data = true;
3602 remaining = 0;
3603 break;
3604 }
3605 remaining -= n_queued;
3606 }
3607 sleep_tx_count = cnt - remaining;
3608 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3609 mvmsta->sleep_tx_count = sleep_tx_count;
3610 spin_unlock_bh(&mvmsta->lock);
3611
3612 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3613 if (WARN_ON(cnt - remaining == 0)) {
3614 ieee80211_sta_eosp(sta);
3615 return;
3616 }
3617 }
3618
3619 /* Note: this is ignored by firmware not supporting GO uAPSD */
3620 if (more_data)
3621 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3622
3623 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3624 mvmsta->next_status_eosp = true;
3625 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3626 } else {
3627 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3628 }
3629
3630 /* block the Tx queues until the FW updated the sleep Tx count */
3631 iwl_trans_block_txq_ptrs(mvm->trans, true);
3632
3633 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3634 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3635 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3636 if (ret)
3637 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3638 }
3639
3640 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3641 struct iwl_rx_cmd_buffer *rxb)
3642 {
3643 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3644 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3645 struct ieee80211_sta *sta;
3646 u32 sta_id = le32_to_cpu(notif->sta_id);
3647
3648 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
3649 return;
3650
3651 rcu_read_lock();
3652 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3653 if (!IS_ERR_OR_NULL(sta))
3654 ieee80211_sta_eosp(sta);
3655 rcu_read_unlock();
3656 }
3657
3658 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3659 struct iwl_mvm_sta *mvmsta, bool disable)
3660 {
3661 struct iwl_mvm_add_sta_cmd cmd = {
3662 .add_modify = STA_MODE_MODIFY,
3663 .sta_id = mvmsta->sta_id,
3664 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3665 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3666 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3667 };
3668 int ret;
3669
3670 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3671 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3672 if (ret)
3673 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3674 }
3675
3676 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3677 struct ieee80211_sta *sta,
3678 bool disable)
3679 {
3680 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3681
3682 spin_lock_bh(&mvm_sta->lock);
3683
3684 if (mvm_sta->disable_tx == disable) {
3685 spin_unlock_bh(&mvm_sta->lock);
3686 return;
3687 }
3688
3689 mvm_sta->disable_tx = disable;
3690
3691 /*
3692 * Tell mac80211 to start/stop queuing tx for this station,
3693 * but don't stop queuing if there are still pending frames
3694 * for this station.
3695 */
3696 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
3697 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3698
3699 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3700
3701 spin_unlock_bh(&mvm_sta->lock);
3702 }
3703
3704 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3705 struct iwl_mvm_vif *mvmvif,
3706 struct iwl_mvm_int_sta *sta,
3707 bool disable)
3708 {
3709 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3710 struct iwl_mvm_add_sta_cmd cmd = {
3711 .add_modify = STA_MODE_MODIFY,
3712 .sta_id = sta->sta_id,
3713 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3714 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3715 .mac_id_n_color = cpu_to_le32(id),
3716 };
3717 int ret;
3718
3719 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3720 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3721 if (ret)
3722 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3723 }
3724
3725 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3726 struct iwl_mvm_vif *mvmvif,
3727 bool disable)
3728 {
3729 struct ieee80211_sta *sta;
3730 struct iwl_mvm_sta *mvm_sta;
3731 int i;
3732
3733 lockdep_assert_held(&mvm->mutex);
3734
3735 /* Block/unblock all the stations of the given mvmvif */
3736 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
3737 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3738 lockdep_is_held(&mvm->mutex));
3739 if (IS_ERR_OR_NULL(sta))
3740 continue;
3741
3742 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3743 if (mvm_sta->mac_id_n_color !=
3744 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3745 continue;
3746
3747 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3748 }
3749
3750 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3751 return;
3752
3753 /* Need to block/unblock also multicast station */
3754 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3755 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3756 &mvmvif->mcast_sta, disable);
3757
3758 /*
3759 * Only unblock the broadcast station (FW blocks it for immediate
3760 * quiet, not the driver)
3761 */
3762 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3763 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3764 &mvmvif->bcast_sta, disable);
3765 }
3766
3767 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3768 {
3769 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3770 struct iwl_mvm_sta *mvmsta;
3771
3772 rcu_read_lock();
3773
3774 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3775
3776 if (!WARN_ON(!mvmsta))
3777 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3778
3779 rcu_read_unlock();
3780 }
3781
3782 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3783 {
3784 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3785
3786 /*
3787 * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need
3788 * to align the wrap around of ssn so we compare relevant values.
3789 */
3790 if (mvm->trans->cfg->gen2)
3791 sn &= 0xff;
3792
3793 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3794 }
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