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Merge tag 'linux-kselftest-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.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 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 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 return iwl_mvm_has_new_rx_api(mvm) ?
81 sizeof(struct iwl_mvm_add_sta_cmd) :
82 sizeof(struct iwl_mvm_add_sta_cmd_v7);
83 }
84
85 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
86 enum nl80211_iftype iftype)
87 {
88 int sta_id;
89 u32 reserved_ids = 0;
90
91 BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32);
92 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
93
94 lockdep_assert_held(&mvm->mutex);
95
96 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
97 if (iftype != NL80211_IFTYPE_STATION)
98 reserved_ids = BIT(0);
99
100 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
101 for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) {
102 if (BIT(sta_id) & reserved_ids)
103 continue;
104
105 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
106 lockdep_is_held(&mvm->mutex)))
107 return sta_id;
108 }
109 return IWL_MVM_STATION_COUNT;
110 }
111
112 /* send station add/update command to firmware */
113 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
114 bool update, unsigned int flags)
115 {
116 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
117 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
118 .sta_id = mvm_sta->sta_id,
119 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
120 .add_modify = update ? 1 : 0,
121 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
122 STA_FLG_MIMO_EN_MSK),
123 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
124 };
125 int ret;
126 u32 status;
127 u32 agg_size = 0, mpdu_dens = 0;
128
129 if (!update || (flags & STA_MODIFY_QUEUES)) {
130 add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132
133 if (flags & STA_MODIFY_QUEUES)
134 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
135 }
136
137 switch (sta->bandwidth) {
138 case IEEE80211_STA_RX_BW_160:
139 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
140 /* fall through */
141 case IEEE80211_STA_RX_BW_80:
142 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
143 /* fall through */
144 case IEEE80211_STA_RX_BW_40:
145 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
146 /* fall through */
147 case IEEE80211_STA_RX_BW_20:
148 if (sta->ht_cap.ht_supported)
149 add_sta_cmd.station_flags |=
150 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
151 break;
152 }
153
154 switch (sta->rx_nss) {
155 case 1:
156 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
157 break;
158 case 2:
159 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
160 break;
161 case 3 ... 8:
162 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
163 break;
164 }
165
166 switch (sta->smps_mode) {
167 case IEEE80211_SMPS_AUTOMATIC:
168 case IEEE80211_SMPS_NUM_MODES:
169 WARN_ON(1);
170 break;
171 case IEEE80211_SMPS_STATIC:
172 /* override NSS */
173 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
174 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
175 break;
176 case IEEE80211_SMPS_DYNAMIC:
177 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
178 break;
179 case IEEE80211_SMPS_OFF:
180 /* nothing */
181 break;
182 }
183
184 if (sta->ht_cap.ht_supported) {
185 add_sta_cmd.station_flags_msk |=
186 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
187 STA_FLG_AGG_MPDU_DENS_MSK);
188
189 mpdu_dens = sta->ht_cap.ampdu_density;
190 }
191
192 if (sta->vht_cap.vht_supported) {
193 agg_size = sta->vht_cap.cap &
194 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
195 agg_size >>=
196 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
197 } else if (sta->ht_cap.ht_supported) {
198 agg_size = sta->ht_cap.ampdu_factor;
199 }
200
201 add_sta_cmd.station_flags |=
202 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
203 add_sta_cmd.station_flags |=
204 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
205
206 status = ADD_STA_SUCCESS;
207 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
208 iwl_mvm_add_sta_cmd_size(mvm),
209 &add_sta_cmd, &status);
210 if (ret)
211 return ret;
212
213 switch (status & IWL_ADD_STA_STATUS_MASK) {
214 case ADD_STA_SUCCESS:
215 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
216 break;
217 default:
218 ret = -EIO;
219 IWL_ERR(mvm, "ADD_STA failed\n");
220 break;
221 }
222
223 return ret;
224 }
225
226 static void iwl_mvm_rx_agg_session_expired(unsigned long data)
227 {
228 struct iwl_mvm_baid_data __rcu **rcu_ptr = (void *)data;
229 struct iwl_mvm_baid_data *ba_data;
230 struct ieee80211_sta *sta;
231 struct iwl_mvm_sta *mvm_sta;
232 unsigned long timeout;
233
234 rcu_read_lock();
235
236 ba_data = rcu_dereference(*rcu_ptr);
237
238 if (WARN_ON(!ba_data))
239 goto unlock;
240
241 if (!ba_data->timeout)
242 goto unlock;
243
244 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
245 if (time_is_after_jiffies(timeout)) {
246 mod_timer(&ba_data->session_timer, timeout);
247 goto unlock;
248 }
249
250 /* Timer expired */
251 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
252 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
253 ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
254 sta->addr, ba_data->tid);
255 unlock:
256 rcu_read_unlock();
257 }
258
259 static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm,
260 struct ieee80211_sta *sta)
261 {
262 unsigned long used_hw_queues;
263 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
264 unsigned int wdg_timeout =
265 iwl_mvm_get_wd_timeout(mvm, NULL, true, false);
266 u32 ac;
267
268 lockdep_assert_held(&mvm->mutex);
269
270 used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL);
271
272 /* Find available queues, and allocate them to the ACs */
273 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
274 u8 queue = find_first_zero_bit(&used_hw_queues,
275 mvm->first_agg_queue);
276
277 if (queue >= mvm->first_agg_queue) {
278 IWL_ERR(mvm, "Failed to allocate STA queue\n");
279 return -EBUSY;
280 }
281
282 __set_bit(queue, &used_hw_queues);
283 mvmsta->hw_queue[ac] = queue;
284 }
285
286 /* Found a place for all queues - enable them */
287 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
288 iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac],
289 mvmsta->hw_queue[ac],
290 iwl_mvm_ac_to_tx_fifo[ac], 0,
291 wdg_timeout);
292 mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]);
293 }
294
295 return 0;
296 }
297
298 static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm,
299 struct ieee80211_sta *sta)
300 {
301 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
302 unsigned long sta_msk;
303 int i;
304
305 lockdep_assert_held(&mvm->mutex);
306
307 /* disable the TDLS STA-specific queues */
308 sta_msk = mvmsta->tfd_queue_msk;
309 for_each_set_bit(i, &sta_msk, sizeof(sta_msk) * BITS_PER_BYTE)
310 iwl_mvm_disable_txq(mvm, i, i, IWL_MAX_TID_COUNT, 0);
311 }
312
313 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
314 struct ieee80211_sta *sta, u8 ac, int tid,
315 struct ieee80211_hdr *hdr)
316 {
317 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
318 struct iwl_trans_txq_scd_cfg cfg = {
319 .fifo = iwl_mvm_ac_to_tx_fifo[ac],
320 .sta_id = mvmsta->sta_id,
321 .tid = tid,
322 .frame_limit = IWL_FRAME_LIMIT,
323 };
324 unsigned int wdg_timeout =
325 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
326 u8 mac_queue = mvmsta->vif->hw_queue[ac];
327 int queue = -1;
328 int ssn;
329 int ret;
330
331 lockdep_assert_held(&mvm->mutex);
332
333 spin_lock_bh(&mvm->queue_info_lock);
334
335 /*
336 * Non-QoS, QoS NDP and MGMT frames should go to a MGMT queue, if one
337 * exists
338 */
339 if (!ieee80211_is_data_qos(hdr->frame_control) ||
340 ieee80211_is_qos_nullfunc(hdr->frame_control)) {
341 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_MGMT_QUEUE,
342 IWL_MVM_DQA_MAX_MGMT_QUEUE);
343 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
344 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
345 queue);
346
347 /* If no such queue is found, we'll use a DATA queue instead */
348 }
349
350 if (queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
351 queue = mvmsta->reserved_queue;
352 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
353 }
354
355 if (queue < 0)
356 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
357 IWL_MVM_DQA_MAX_DATA_QUEUE);
358
359 /*
360 * Mark TXQ as ready, even though it hasn't been fully configured yet,
361 * to make sure no one else takes it.
362 * This will allow avoiding re-acquiring the lock at the end of the
363 * configuration. On error we'll mark it back as free.
364 */
365 if (queue >= 0)
366 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
367
368 spin_unlock_bh(&mvm->queue_info_lock);
369
370 /* TODO: support shared queues for same RA */
371 if (queue < 0)
372 return -ENOSPC;
373
374 /*
375 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
376 * but for configuring the SCD to send A-MPDUs we need to mark the queue
377 * as aggregatable.
378 * Mark all DATA queues as allowing to be aggregated at some point
379 */
380 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
381 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
382
383 IWL_DEBUG_TX_QUEUES(mvm, "Allocating queue #%d to sta %d on tid %d\n",
384 queue, mvmsta->sta_id, tid);
385
386 ssn = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
387 iwl_mvm_enable_txq(mvm, queue, mac_queue, ssn, &cfg,
388 wdg_timeout);
389
390 spin_lock_bh(&mvmsta->lock);
391 mvmsta->tid_data[tid].txq_id = queue;
392 mvmsta->tfd_queue_msk |= BIT(queue);
393
394 if (mvmsta->reserved_queue == queue)
395 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
396 spin_unlock_bh(&mvmsta->lock);
397
398 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
399 if (ret)
400 goto out_err;
401
402 return 0;
403
404 out_err:
405 iwl_mvm_disable_txq(mvm, queue, mac_queue, tid, 0);
406
407 return ret;
408 }
409
410 static inline u8 iwl_mvm_tid_to_ac_queue(int tid)
411 {
412 if (tid == IWL_MAX_TID_COUNT)
413 return IEEE80211_AC_VO; /* MGMT */
414
415 return tid_to_mac80211_ac[tid];
416 }
417
418 static void iwl_mvm_tx_deferred_stream(struct iwl_mvm *mvm,
419 struct ieee80211_sta *sta, int tid)
420 {
421 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
422 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
423 struct sk_buff *skb;
424 struct ieee80211_hdr *hdr;
425 struct sk_buff_head deferred_tx;
426 u8 mac_queue;
427 bool no_queue = false; /* Marks if there is a problem with the queue */
428 u8 ac;
429
430 lockdep_assert_held(&mvm->mutex);
431
432 skb = skb_peek(&tid_data->deferred_tx_frames);
433 if (!skb)
434 return;
435 hdr = (void *)skb->data;
436
437 ac = iwl_mvm_tid_to_ac_queue(tid);
438 mac_queue = IEEE80211_SKB_CB(skb)->hw_queue;
439
440 if (tid_data->txq_id == IEEE80211_INVAL_HW_QUEUE &&
441 iwl_mvm_sta_alloc_queue(mvm, sta, ac, tid, hdr)) {
442 IWL_ERR(mvm,
443 "Can't alloc TXQ for sta %d tid %d - dropping frame\n",
444 mvmsta->sta_id, tid);
445
446 /*
447 * Mark queue as problematic so later the deferred traffic is
448 * freed, as we can do nothing with it
449 */
450 no_queue = true;
451 }
452
453 __skb_queue_head_init(&deferred_tx);
454
455 /* Disable bottom-halves when entering TX path */
456 local_bh_disable();
457 spin_lock(&mvmsta->lock);
458 skb_queue_splice_init(&tid_data->deferred_tx_frames, &deferred_tx);
459 spin_unlock(&mvmsta->lock);
460
461 while ((skb = __skb_dequeue(&deferred_tx)))
462 if (no_queue || iwl_mvm_tx_skb(mvm, skb, sta))
463 ieee80211_free_txskb(mvm->hw, skb);
464 local_bh_enable();
465
466 /* Wake queue */
467 iwl_mvm_start_mac_queues(mvm, BIT(mac_queue));
468 }
469
470 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
471 {
472 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
473 add_stream_wk);
474 struct ieee80211_sta *sta;
475 struct iwl_mvm_sta *mvmsta;
476 unsigned long deferred_tid_traffic;
477 int sta_id, tid;
478
479 mutex_lock(&mvm->mutex);
480
481 /* Go over all stations with deferred traffic */
482 for_each_set_bit(sta_id, mvm->sta_deferred_frames,
483 IWL_MVM_STATION_COUNT) {
484 clear_bit(sta_id, mvm->sta_deferred_frames);
485 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
486 lockdep_is_held(&mvm->mutex));
487 if (IS_ERR_OR_NULL(sta))
488 continue;
489
490 mvmsta = iwl_mvm_sta_from_mac80211(sta);
491 deferred_tid_traffic = mvmsta->deferred_traffic_tid_map;
492
493 for_each_set_bit(tid, &deferred_tid_traffic,
494 IWL_MAX_TID_COUNT + 1)
495 iwl_mvm_tx_deferred_stream(mvm, sta, tid);
496 }
497
498 mutex_unlock(&mvm->mutex);
499 }
500
501 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
502 struct ieee80211_sta *sta,
503 enum nl80211_iftype vif_type)
504 {
505 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
506 int queue;
507
508 spin_lock_bh(&mvm->queue_info_lock);
509
510 /* Make sure we have free resources for this STA */
511 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
512 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].hw_queue_refcount &&
513 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
514 IWL_MVM_QUEUE_FREE))
515 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
516 else
517 queue = iwl_mvm_find_free_queue(mvm, IWL_MVM_DQA_MIN_DATA_QUEUE,
518 IWL_MVM_DQA_MAX_DATA_QUEUE);
519 if (queue < 0) {
520 spin_unlock_bh(&mvm->queue_info_lock);
521 IWL_ERR(mvm, "No available queues for new station\n");
522 return -ENOSPC;
523 }
524 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
525
526 spin_unlock_bh(&mvm->queue_info_lock);
527
528 mvmsta->reserved_queue = queue;
529
530 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
531 queue, mvmsta->sta_id);
532
533 return 0;
534 }
535
536 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
537 struct ieee80211_vif *vif,
538 struct ieee80211_sta *sta)
539 {
540 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
541 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
542 struct iwl_mvm_rxq_dup_data *dup_data;
543 int i, ret, sta_id;
544
545 lockdep_assert_held(&mvm->mutex);
546
547 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
548 sta_id = iwl_mvm_find_free_sta_id(mvm,
549 ieee80211_vif_type_p2p(vif));
550 else
551 sta_id = mvm_sta->sta_id;
552
553 if (sta_id == IWL_MVM_STATION_COUNT)
554 return -ENOSPC;
555
556 spin_lock_init(&mvm_sta->lock);
557
558 mvm_sta->sta_id = sta_id;
559 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
560 mvmvif->color);
561 mvm_sta->vif = vif;
562 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
563 mvm_sta->tx_protection = 0;
564 mvm_sta->tt_tx_protection = false;
565
566 /* HW restart, don't assume the memory has been zeroed */
567 atomic_set(&mvm->pending_frames[sta_id], 0);
568 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
569 mvm_sta->tfd_queue_msk = 0;
570
571 /* allocate new queues for a TDLS station */
572 if (sta->tdls) {
573 ret = iwl_mvm_tdls_sta_init(mvm, sta);
574 if (ret)
575 return ret;
576 } else if (!iwl_mvm_is_dqa_supported(mvm)) {
577 for (i = 0; i < IEEE80211_NUM_ACS; i++)
578 if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE)
579 mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]);
580 }
581
582 /* for HW restart - reset everything but the sequence number */
583 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
584 u16 seq = mvm_sta->tid_data[i].seq_number;
585 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
586 mvm_sta->tid_data[i].seq_number = seq;
587
588 if (!iwl_mvm_is_dqa_supported(mvm))
589 continue;
590
591 /*
592 * Mark all queues for this STA as unallocated and defer TX
593 * frames until the queue is allocated
594 */
595 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
596 skb_queue_head_init(&mvm_sta->tid_data[i].deferred_tx_frames);
597 }
598 mvm_sta->deferred_traffic_tid_map = 0;
599 mvm_sta->agg_tids = 0;
600
601 if (iwl_mvm_has_new_rx_api(mvm) &&
602 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
603 dup_data = kcalloc(mvm->trans->num_rx_queues,
604 sizeof(*dup_data),
605 GFP_KERNEL);
606 if (!dup_data)
607 return -ENOMEM;
608 mvm_sta->dup_data = dup_data;
609 }
610
611 if (iwl_mvm_is_dqa_supported(mvm)) {
612 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
613 ieee80211_vif_type_p2p(vif));
614 if (ret)
615 goto err;
616 }
617
618 ret = iwl_mvm_sta_send_to_fw(mvm, sta, false, 0);
619 if (ret)
620 goto err;
621
622 if (vif->type == NL80211_IFTYPE_STATION) {
623 if (!sta->tdls) {
624 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT);
625 mvmvif->ap_sta_id = sta_id;
626 } else {
627 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT);
628 }
629 }
630
631 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
632
633 return 0;
634
635 err:
636 iwl_mvm_tdls_sta_deinit(mvm, sta);
637 return ret;
638 }
639
640 int iwl_mvm_update_sta(struct iwl_mvm *mvm,
641 struct ieee80211_vif *vif,
642 struct ieee80211_sta *sta)
643 {
644 return iwl_mvm_sta_send_to_fw(mvm, sta, true, 0);
645 }
646
647 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
648 bool drain)
649 {
650 struct iwl_mvm_add_sta_cmd cmd = {};
651 int ret;
652 u32 status;
653
654 lockdep_assert_held(&mvm->mutex);
655
656 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
657 cmd.sta_id = mvmsta->sta_id;
658 cmd.add_modify = STA_MODE_MODIFY;
659 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
660 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
661
662 status = ADD_STA_SUCCESS;
663 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
664 iwl_mvm_add_sta_cmd_size(mvm),
665 &cmd, &status);
666 if (ret)
667 return ret;
668
669 switch (status & IWL_ADD_STA_STATUS_MASK) {
670 case ADD_STA_SUCCESS:
671 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
672 mvmsta->sta_id);
673 break;
674 default:
675 ret = -EIO;
676 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
677 mvmsta->sta_id);
678 break;
679 }
680
681 return ret;
682 }
683
684 /*
685 * Remove a station from the FW table. Before sending the command to remove
686 * the station validate that the station is indeed known to the driver (sanity
687 * only).
688 */
689 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
690 {
691 struct ieee80211_sta *sta;
692 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
693 .sta_id = sta_id,
694 };
695 int ret;
696
697 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
698 lockdep_is_held(&mvm->mutex));
699
700 /* Note: internal stations are marked as error values */
701 if (!sta) {
702 IWL_ERR(mvm, "Invalid station id\n");
703 return -EINVAL;
704 }
705
706 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
707 sizeof(rm_sta_cmd), &rm_sta_cmd);
708 if (ret) {
709 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
710 return ret;
711 }
712
713 return 0;
714 }
715
716 void iwl_mvm_sta_drained_wk(struct work_struct *wk)
717 {
718 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk);
719 u8 sta_id;
720
721 /*
722 * The mutex is needed because of the SYNC cmd, but not only: if the
723 * work would run concurrently with iwl_mvm_rm_sta, it would run before
724 * iwl_mvm_rm_sta sets the station as busy, and exit. Then
725 * iwl_mvm_rm_sta would set the station as busy, and nobody will clean
726 * that later.
727 */
728 mutex_lock(&mvm->mutex);
729
730 for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) {
731 int ret;
732 struct ieee80211_sta *sta =
733 rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
734 lockdep_is_held(&mvm->mutex));
735
736 /*
737 * This station is in use or RCU-removed; the latter happens in
738 * managed mode, where mac80211 removes the station before we
739 * can remove it from firmware (we can only do that after the
740 * MAC is marked unassociated), and possibly while the deauth
741 * frame to disconnect from the AP is still queued. Then, the
742 * station pointer is -ENOENT when the last skb is reclaimed.
743 */
744 if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT)
745 continue;
746
747 if (PTR_ERR(sta) == -EINVAL) {
748 IWL_ERR(mvm, "Drained sta %d, but it is internal?\n",
749 sta_id);
750 continue;
751 }
752
753 if (!sta) {
754 IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n",
755 sta_id);
756 continue;
757 }
758
759 WARN_ON(PTR_ERR(sta) != -EBUSY);
760 /* This station was removed and we waited until it got drained,
761 * we can now proceed and remove it.
762 */
763 ret = iwl_mvm_rm_sta_common(mvm, sta_id);
764 if (ret) {
765 IWL_ERR(mvm,
766 "Couldn't remove sta %d after it was drained\n",
767 sta_id);
768 continue;
769 }
770 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
771 clear_bit(sta_id, mvm->sta_drained);
772
773 if (mvm->tfd_drained[sta_id]) {
774 unsigned long i, msk = mvm->tfd_drained[sta_id];
775
776 for_each_set_bit(i, &msk, sizeof(msk) * BITS_PER_BYTE)
777 iwl_mvm_disable_txq(mvm, i, i,
778 IWL_MAX_TID_COUNT, 0);
779
780 mvm->tfd_drained[sta_id] = 0;
781 IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n",
782 sta_id, msk);
783 }
784 }
785
786 mutex_unlock(&mvm->mutex);
787 }
788
789 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
790 struct ieee80211_vif *vif,
791 struct iwl_mvm_sta *mvm_sta)
792 {
793 int ac;
794 int i;
795
796 lockdep_assert_held(&mvm->mutex);
797
798 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
799 if (mvm_sta->tid_data[i].txq_id == IEEE80211_INVAL_HW_QUEUE)
800 continue;
801
802 ac = iwl_mvm_tid_to_ac_queue(i);
803 iwl_mvm_disable_txq(mvm, mvm_sta->tid_data[i].txq_id,
804 vif->hw_queue[ac], i, 0);
805 mvm_sta->tid_data[i].txq_id = IEEE80211_INVAL_HW_QUEUE;
806 }
807 }
808
809 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
810 struct ieee80211_vif *vif,
811 struct ieee80211_sta *sta)
812 {
813 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
814 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
815 int ret;
816
817 lockdep_assert_held(&mvm->mutex);
818
819 if (iwl_mvm_has_new_rx_api(mvm))
820 kfree(mvm_sta->dup_data);
821
822 if (vif->type == NL80211_IFTYPE_STATION &&
823 mvmvif->ap_sta_id == mvm_sta->sta_id) {
824 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
825 if (ret)
826 return ret;
827 /* flush its queues here since we are freeing mvm_sta */
828 ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, 0);
829 if (ret)
830 return ret;
831 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
832 mvm_sta->tfd_queue_msk);
833 if (ret)
834 return ret;
835 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
836
837 /* If DQA is supported - the queues can be disabled now */
838 if (iwl_mvm_is_dqa_supported(mvm))
839 iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta);
840
841 /* if we are associated - we can't remove the AP STA now */
842 if (vif->bss_conf.assoc)
843 return ret;
844
845 /* unassoc - go ahead - remove the AP STA now */
846 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
847
848 /* clear d0i3_ap_sta_id if no longer relevant */
849 if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id)
850 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
851 }
852
853 /*
854 * This shouldn't happen - the TDLS channel switch should be canceled
855 * before the STA is removed.
856 */
857 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) {
858 mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT;
859 cancel_delayed_work(&mvm->tdls_cs.dwork);
860 }
861
862 /*
863 * Make sure that the tx response code sees the station as -EBUSY and
864 * calls the drain worker.
865 */
866 spin_lock_bh(&mvm_sta->lock);
867 /*
868 * There are frames pending on the AC queues for this station.
869 * We need to wait until all the frames are drained...
870 */
871 if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) {
872 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
873 ERR_PTR(-EBUSY));
874 spin_unlock_bh(&mvm_sta->lock);
875
876 /* disable TDLS sta queues on drain complete */
877 if (sta->tdls) {
878 mvm->tfd_drained[mvm_sta->sta_id] =
879 mvm_sta->tfd_queue_msk;
880 IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n",
881 mvm_sta->sta_id);
882 }
883
884 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
885 } else {
886 spin_unlock_bh(&mvm_sta->lock);
887
888 if (sta->tdls)
889 iwl_mvm_tdls_sta_deinit(mvm, sta);
890
891 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
892 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
893 }
894
895 return ret;
896 }
897
898 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
899 struct ieee80211_vif *vif,
900 u8 sta_id)
901 {
902 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
903
904 lockdep_assert_held(&mvm->mutex);
905
906 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
907 return ret;
908 }
909
910 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
911 struct iwl_mvm_int_sta *sta,
912 u32 qmask, enum nl80211_iftype iftype)
913 {
914 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
915 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
916 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT))
917 return -ENOSPC;
918 }
919
920 sta->tfd_queue_msk = qmask;
921
922 /* put a non-NULL value so iterating over the stations won't stop */
923 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
924 return 0;
925 }
926
927 static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm,
928 struct iwl_mvm_int_sta *sta)
929 {
930 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
931 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
932 sta->sta_id = IWL_MVM_STATION_COUNT;
933 }
934
935 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
936 struct iwl_mvm_int_sta *sta,
937 const u8 *addr,
938 u16 mac_id, u16 color)
939 {
940 struct iwl_mvm_add_sta_cmd cmd;
941 int ret;
942 u32 status;
943
944 lockdep_assert_held(&mvm->mutex);
945
946 memset(&cmd, 0, sizeof(cmd));
947 cmd.sta_id = sta->sta_id;
948 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
949 color));
950
951 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
952 cmd.tid_disable_tx = cpu_to_le16(0xffff);
953
954 if (addr)
955 memcpy(cmd.addr, addr, ETH_ALEN);
956
957 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
958 iwl_mvm_add_sta_cmd_size(mvm),
959 &cmd, &status);
960 if (ret)
961 return ret;
962
963 switch (status & IWL_ADD_STA_STATUS_MASK) {
964 case ADD_STA_SUCCESS:
965 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
966 return 0;
967 default:
968 ret = -EIO;
969 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
970 status);
971 break;
972 }
973 return ret;
974 }
975
976 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm)
977 {
978 unsigned int wdg_timeout = iwlmvm_mod_params.tfd_q_hang_detect ?
979 mvm->cfg->base_params->wd_timeout :
980 IWL_WATCHDOG_DISABLED;
981 int ret;
982
983 lockdep_assert_held(&mvm->mutex);
984
985 /* Map Aux queue to fifo - needs to happen before adding Aux station */
986 iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, mvm->aux_queue,
987 IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout);
988
989 /* Allocate aux station and assign to it the aux queue */
990 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
991 NL80211_IFTYPE_UNSPECIFIED);
992 if (ret)
993 return ret;
994
995 ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL,
996 MAC_INDEX_AUX, 0);
997
998 if (ret)
999 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1000 return ret;
1001 }
1002
1003 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1004 {
1005 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1006
1007 lockdep_assert_held(&mvm->mutex);
1008 return iwl_mvm_add_int_sta_common(mvm, &mvm->snif_sta, vif->addr,
1009 mvmvif->id, 0);
1010 }
1011
1012 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1013 {
1014 int ret;
1015
1016 lockdep_assert_held(&mvm->mutex);
1017
1018 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
1019 if (ret)
1020 IWL_WARN(mvm, "Failed sending remove station\n");
1021
1022 return ret;
1023 }
1024
1025 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
1026 {
1027 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
1028 }
1029
1030 void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm)
1031 {
1032 lockdep_assert_held(&mvm->mutex);
1033
1034 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
1035 }
1036
1037 /*
1038 * Send the add station command for the vif's broadcast station.
1039 * Assumes that the station was already allocated.
1040 *
1041 * @mvm: the mvm component
1042 * @vif: the interface to which the broadcast station is added
1043 * @bsta: the broadcast station to add.
1044 */
1045 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1046 {
1047 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1048 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1049 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1050 const u8 *baddr = _baddr;
1051
1052 lockdep_assert_held(&mvm->mutex);
1053
1054 if (iwl_mvm_is_dqa_supported(mvm)) {
1055 struct iwl_trans_txq_scd_cfg cfg = {
1056 .fifo = IWL_MVM_TX_FIFO_VO,
1057 .sta_id = mvmvif->bcast_sta.sta_id,
1058 .tid = IWL_MAX_TID_COUNT,
1059 .aggregate = false,
1060 .frame_limit = IWL_FRAME_LIMIT,
1061 };
1062 unsigned int wdg_timeout =
1063 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
1064 int queue;
1065
1066 if ((vif->type == NL80211_IFTYPE_AP) &&
1067 (mvmvif->bcast_sta.tfd_queue_msk &
1068 BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE)))
1069 queue = IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
1070 else if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) &&
1071 (mvmvif->bcast_sta.tfd_queue_msk &
1072 BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE)))
1073 queue = IWL_MVM_DQA_P2P_DEVICE_QUEUE;
1074 else if (WARN(1, "Missed required TXQ for adding bcast STA\n"))
1075 return -EINVAL;
1076
1077 iwl_mvm_enable_txq(mvm, queue, vif->hw_queue[0], 0, &cfg,
1078 wdg_timeout);
1079 }
1080
1081 if (vif->type == NL80211_IFTYPE_ADHOC)
1082 baddr = vif->bss_conf.bssid;
1083
1084 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT))
1085 return -ENOSPC;
1086
1087 return iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
1088 mvmvif->id, mvmvif->color);
1089 }
1090
1091 /* Send the FW a request to remove the station from it's internal data
1092 * structures, but DO NOT remove the entry from the local data structures. */
1093 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1094 {
1095 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1096 int ret;
1097
1098 lockdep_assert_held(&mvm->mutex);
1099
1100 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
1101 if (ret)
1102 IWL_WARN(mvm, "Failed sending remove station\n");
1103 return ret;
1104 }
1105
1106 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1107 {
1108 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1109 u32 qmask = 0;
1110
1111 lockdep_assert_held(&mvm->mutex);
1112
1113 if (!iwl_mvm_is_dqa_supported(mvm))
1114 qmask = iwl_mvm_mac_get_queues_mask(vif);
1115
1116 if (vif->type == NL80211_IFTYPE_AP) {
1117 /*
1118 * The firmware defines the TFD queue mask to only be relevant
1119 * for *unicast* queues, so the multicast (CAB) queue shouldn't
1120 * be included.
1121 */
1122 qmask &= ~BIT(vif->cab_queue);
1123
1124 if (iwl_mvm_is_dqa_supported(mvm))
1125 qmask |= BIT(IWL_MVM_DQA_AP_PROBE_RESP_QUEUE);
1126 } else if (iwl_mvm_is_dqa_supported(mvm) &&
1127 vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1128 qmask |= BIT(IWL_MVM_DQA_P2P_DEVICE_QUEUE);
1129 }
1130
1131 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask,
1132 ieee80211_vif_type_p2p(vif));
1133 }
1134
1135 /* Allocate a new station entry for the broadcast station to the given vif,
1136 * and send it to the FW.
1137 * Note that each P2P mac should have its own broadcast station.
1138 *
1139 * @mvm: the mvm component
1140 * @vif: the interface to which the broadcast station is added
1141 * @bsta: the broadcast station to add. */
1142 int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1143 {
1144 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1145 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
1146 int ret;
1147
1148 lockdep_assert_held(&mvm->mutex);
1149
1150 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1151 if (ret)
1152 return ret;
1153
1154 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1155
1156 if (ret)
1157 iwl_mvm_dealloc_int_sta(mvm, bsta);
1158
1159 return ret;
1160 }
1161
1162 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1163 {
1164 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1165
1166 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1167 }
1168
1169 /*
1170 * Send the FW a request to remove the station from it's internal data
1171 * structures, and in addition remove it from the local data structure.
1172 */
1173 int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1174 {
1175 int ret;
1176
1177 lockdep_assert_held(&mvm->mutex);
1178
1179 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
1180
1181 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1182
1183 return ret;
1184 }
1185
1186 #define IWL_MAX_RX_BA_SESSIONS 16
1187
1188 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
1189 {
1190 struct iwl_mvm_delba_notif notif = {
1191 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
1192 .metadata.sync = 1,
1193 .delba.baid = baid,
1194 };
1195 iwl_mvm_sync_rx_queues_internal(mvm, (void *)&notif, sizeof(notif));
1196 };
1197
1198 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
1199 struct iwl_mvm_baid_data *data)
1200 {
1201 int i;
1202
1203 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
1204
1205 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1206 int j;
1207 struct iwl_mvm_reorder_buffer *reorder_buf =
1208 &data->reorder_buf[i];
1209
1210 spin_lock_bh(&reorder_buf->lock);
1211 if (likely(!reorder_buf->num_stored)) {
1212 spin_unlock_bh(&reorder_buf->lock);
1213 continue;
1214 }
1215
1216 /*
1217 * This shouldn't happen in regular DELBA since the internal
1218 * delBA notification should trigger a release of all frames in
1219 * the reorder buffer.
1220 */
1221 WARN_ON(1);
1222
1223 for (j = 0; j < reorder_buf->buf_size; j++)
1224 __skb_queue_purge(&reorder_buf->entries[j]);
1225 /*
1226 * Prevent timer re-arm. This prevents a very far fetched case
1227 * where we timed out on the notification. There may be prior
1228 * RX frames pending in the RX queue before the notification
1229 * that might get processed between now and the actual deletion
1230 * and we would re-arm the timer although we are deleting the
1231 * reorder buffer.
1232 */
1233 reorder_buf->removed = true;
1234 spin_unlock_bh(&reorder_buf->lock);
1235 del_timer_sync(&reorder_buf->reorder_timer);
1236 }
1237 }
1238
1239 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
1240 u32 sta_id,
1241 struct iwl_mvm_baid_data *data,
1242 u16 ssn, u8 buf_size)
1243 {
1244 int i;
1245
1246 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
1247 struct iwl_mvm_reorder_buffer *reorder_buf =
1248 &data->reorder_buf[i];
1249 int j;
1250
1251 reorder_buf->num_stored = 0;
1252 reorder_buf->head_sn = ssn;
1253 reorder_buf->buf_size = buf_size;
1254 /* rx reorder timer */
1255 reorder_buf->reorder_timer.function =
1256 iwl_mvm_reorder_timer_expired;
1257 reorder_buf->reorder_timer.data = (unsigned long)reorder_buf;
1258 init_timer(&reorder_buf->reorder_timer);
1259 spin_lock_init(&reorder_buf->lock);
1260 reorder_buf->mvm = mvm;
1261 reorder_buf->queue = i;
1262 reorder_buf->sta_id = sta_id;
1263 for (j = 0; j < reorder_buf->buf_size; j++)
1264 __skb_queue_head_init(&reorder_buf->entries[j]);
1265 }
1266 }
1267
1268 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1269 int tid, u16 ssn, bool start, u8 buf_size, u16 timeout)
1270 {
1271 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1272 struct iwl_mvm_add_sta_cmd cmd = {};
1273 struct iwl_mvm_baid_data *baid_data = NULL;
1274 int ret;
1275 u32 status;
1276
1277 lockdep_assert_held(&mvm->mutex);
1278
1279 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
1280 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
1281 return -ENOSPC;
1282 }
1283
1284 if (iwl_mvm_has_new_rx_api(mvm) && start) {
1285 /*
1286 * Allocate here so if allocation fails we can bail out early
1287 * before starting the BA session in the firmware
1288 */
1289 baid_data = kzalloc(sizeof(*baid_data) +
1290 mvm->trans->num_rx_queues *
1291 sizeof(baid_data->reorder_buf[0]),
1292 GFP_KERNEL);
1293 if (!baid_data)
1294 return -ENOMEM;
1295 }
1296
1297 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1298 cmd.sta_id = mvm_sta->sta_id;
1299 cmd.add_modify = STA_MODE_MODIFY;
1300 if (start) {
1301 cmd.add_immediate_ba_tid = (u8) tid;
1302 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
1303 cmd.rx_ba_window = cpu_to_le16((u16)buf_size);
1304 } else {
1305 cmd.remove_immediate_ba_tid = (u8) tid;
1306 }
1307 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
1308 STA_MODIFY_REMOVE_BA_TID;
1309
1310 status = ADD_STA_SUCCESS;
1311 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1312 iwl_mvm_add_sta_cmd_size(mvm),
1313 &cmd, &status);
1314 if (ret)
1315 goto out_free;
1316
1317 switch (status & IWL_ADD_STA_STATUS_MASK) {
1318 case ADD_STA_SUCCESS:
1319 IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n",
1320 start ? "start" : "stopp");
1321 break;
1322 case ADD_STA_IMMEDIATE_BA_FAILURE:
1323 IWL_WARN(mvm, "RX BA Session refused by fw\n");
1324 ret = -ENOSPC;
1325 break;
1326 default:
1327 ret = -EIO;
1328 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
1329 start ? "start" : "stopp", status);
1330 break;
1331 }
1332
1333 if (ret)
1334 goto out_free;
1335
1336 if (start) {
1337 u8 baid;
1338
1339 mvm->rx_ba_sessions++;
1340
1341 if (!iwl_mvm_has_new_rx_api(mvm))
1342 return 0;
1343
1344 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
1345 ret = -EINVAL;
1346 goto out_free;
1347 }
1348 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
1349 IWL_ADD_STA_BAID_SHIFT);
1350 baid_data->baid = baid;
1351 baid_data->timeout = timeout;
1352 baid_data->last_rx = jiffies;
1353 init_timer(&baid_data->session_timer);
1354 baid_data->session_timer.function =
1355 iwl_mvm_rx_agg_session_expired;
1356 baid_data->session_timer.data =
1357 (unsigned long)&mvm->baid_map[baid];
1358 baid_data->mvm = mvm;
1359 baid_data->tid = tid;
1360 baid_data->sta_id = mvm_sta->sta_id;
1361
1362 mvm_sta->tid_to_baid[tid] = baid;
1363 if (timeout)
1364 mod_timer(&baid_data->session_timer,
1365 TU_TO_EXP_TIME(timeout * 2));
1366
1367 iwl_mvm_init_reorder_buffer(mvm, mvm_sta->sta_id,
1368 baid_data, ssn, buf_size);
1369 /*
1370 * protect the BA data with RCU to cover a case where our
1371 * internal RX sync mechanism will timeout (not that it's
1372 * supposed to happen) and we will free the session data while
1373 * RX is being processed in parallel
1374 */
1375 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
1376 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
1377 } else if (mvm->rx_ba_sessions > 0) {
1378 u8 baid = mvm_sta->tid_to_baid[tid];
1379
1380 /* check that restart flow didn't zero the counter */
1381 mvm->rx_ba_sessions--;
1382 if (!iwl_mvm_has_new_rx_api(mvm))
1383 return 0;
1384
1385 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
1386 return -EINVAL;
1387
1388 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
1389 if (WARN_ON(!baid_data))
1390 return -EINVAL;
1391
1392 /* synchronize all rx queues so we can safely delete */
1393 iwl_mvm_free_reorder(mvm, baid_data);
1394 del_timer_sync(&baid_data->session_timer);
1395 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
1396 kfree_rcu(baid_data, rcu_head);
1397 }
1398 return 0;
1399
1400 out_free:
1401 kfree(baid_data);
1402 return ret;
1403 }
1404
1405 static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
1406 int tid, u8 queue, bool start)
1407 {
1408 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1409 struct iwl_mvm_add_sta_cmd cmd = {};
1410 int ret;
1411 u32 status;
1412
1413 lockdep_assert_held(&mvm->mutex);
1414
1415 if (start) {
1416 mvm_sta->tfd_queue_msk |= BIT(queue);
1417 mvm_sta->tid_disable_agg &= ~BIT(tid);
1418 } else {
1419 /* In DQA-mode the queue isn't removed on agg termination */
1420 if (!iwl_mvm_is_dqa_supported(mvm))
1421 mvm_sta->tfd_queue_msk &= ~BIT(queue);
1422 mvm_sta->tid_disable_agg |= BIT(tid);
1423 }
1424
1425 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
1426 cmd.sta_id = mvm_sta->sta_id;
1427 cmd.add_modify = STA_MODE_MODIFY;
1428 cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX;
1429 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
1430 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
1431
1432 status = ADD_STA_SUCCESS;
1433 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1434 iwl_mvm_add_sta_cmd_size(mvm),
1435 &cmd, &status);
1436 if (ret)
1437 return ret;
1438
1439 switch (status & IWL_ADD_STA_STATUS_MASK) {
1440 case ADD_STA_SUCCESS:
1441 break;
1442 default:
1443 ret = -EIO;
1444 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
1445 start ? "start" : "stopp", status);
1446 break;
1447 }
1448
1449 return ret;
1450 }
1451
1452 const u8 tid_to_mac80211_ac[] = {
1453 IEEE80211_AC_BE,
1454 IEEE80211_AC_BK,
1455 IEEE80211_AC_BK,
1456 IEEE80211_AC_BE,
1457 IEEE80211_AC_VI,
1458 IEEE80211_AC_VI,
1459 IEEE80211_AC_VO,
1460 IEEE80211_AC_VO,
1461 };
1462
1463 static const u8 tid_to_ucode_ac[] = {
1464 AC_BE,
1465 AC_BK,
1466 AC_BK,
1467 AC_BE,
1468 AC_VI,
1469 AC_VI,
1470 AC_VO,
1471 AC_VO,
1472 };
1473
1474 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1475 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
1476 {
1477 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1478 struct iwl_mvm_tid_data *tid_data;
1479 int txq_id;
1480 int ret;
1481
1482 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1483 return -EINVAL;
1484
1485 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
1486 IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n",
1487 mvmsta->tid_data[tid].state);
1488 return -ENXIO;
1489 }
1490
1491 lockdep_assert_held(&mvm->mutex);
1492
1493 spin_lock_bh(&mvmsta->lock);
1494
1495 /* possible race condition - we entered D0i3 while starting agg */
1496 if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) {
1497 spin_unlock_bh(&mvmsta->lock);
1498 IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n");
1499 return -EIO;
1500 }
1501
1502 spin_lock_bh(&mvm->queue_info_lock);
1503
1504 /*
1505 * Note the possible cases:
1506 * 1. In DQA mode with an enabled TXQ - TXQ needs to become agg'ed
1507 * 2. Non-DQA mode: the TXQ hasn't yet been enabled, so find a free
1508 * one and mark it as reserved
1509 * 3. In DQA mode, but no traffic yet on this TID: same treatment as in
1510 * non-DQA mode, since the TXQ hasn't yet been allocated
1511 */
1512 txq_id = mvmsta->tid_data[tid].txq_id;
1513 if (!iwl_mvm_is_dqa_supported(mvm) ||
1514 mvm->queue_info[txq_id].status != IWL_MVM_QUEUE_READY) {
1515 txq_id = iwl_mvm_find_free_queue(mvm, mvm->first_agg_queue,
1516 mvm->last_agg_queue);
1517 if (txq_id < 0) {
1518 ret = txq_id;
1519 spin_unlock_bh(&mvm->queue_info_lock);
1520 IWL_ERR(mvm, "Failed to allocate agg queue\n");
1521 goto release_locks;
1522 }
1523
1524 /* TXQ hasn't yet been enabled, so mark it only as reserved */
1525 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
1526 }
1527 spin_unlock_bh(&mvm->queue_info_lock);
1528
1529 IWL_DEBUG_TX_QUEUES(mvm,
1530 "AGG for tid %d will be on queue #%d\n",
1531 tid, txq_id);
1532
1533 tid_data = &mvmsta->tid_data[tid];
1534 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1535 tid_data->txq_id = txq_id;
1536 *ssn = tid_data->ssn;
1537
1538 IWL_DEBUG_TX_QUEUES(mvm,
1539 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
1540 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
1541 tid_data->next_reclaimed);
1542
1543 if (tid_data->ssn == tid_data->next_reclaimed) {
1544 tid_data->state = IWL_AGG_STARTING;
1545 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1546 } else {
1547 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
1548 }
1549
1550 ret = 0;
1551
1552 release_locks:
1553 spin_unlock_bh(&mvmsta->lock);
1554
1555 return ret;
1556 }
1557
1558 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1559 struct ieee80211_sta *sta, u16 tid, u8 buf_size,
1560 bool amsdu)
1561 {
1562 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1563 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1564 unsigned int wdg_timeout =
1565 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
1566 int queue, ret;
1567 bool alloc_queue = true;
1568 u16 ssn;
1569
1570 struct iwl_trans_txq_scd_cfg cfg = {
1571 .sta_id = mvmsta->sta_id,
1572 .tid = tid,
1573 .frame_limit = buf_size,
1574 .aggregate = true,
1575 };
1576
1577 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
1578 != IWL_MAX_TID_COUNT);
1579
1580 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
1581
1582 spin_lock_bh(&mvmsta->lock);
1583 ssn = tid_data->ssn;
1584 queue = tid_data->txq_id;
1585 tid_data->state = IWL_AGG_ON;
1586 mvmsta->agg_tids |= BIT(tid);
1587 tid_data->ssn = 0xffff;
1588 tid_data->amsdu_in_ampdu_allowed = amsdu;
1589 spin_unlock_bh(&mvmsta->lock);
1590
1591 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1592
1593 /* In DQA mode, the existing queue might need to be reconfigured */
1594 if (iwl_mvm_is_dqa_supported(mvm)) {
1595 spin_lock_bh(&mvm->queue_info_lock);
1596 /* Maybe there is no need to even alloc a queue... */
1597 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
1598 alloc_queue = false;
1599 spin_unlock_bh(&mvm->queue_info_lock);
1600
1601 /*
1602 * Only reconfig the SCD for the queue if the window size has
1603 * changed from current (become smaller)
1604 */
1605 if (!alloc_queue && buf_size < mvmsta->max_agg_bufsize) {
1606 /*
1607 * If reconfiguring an existing queue, it first must be
1608 * drained
1609 */
1610 ret = iwl_trans_wait_tx_queue_empty(mvm->trans,
1611 BIT(queue));
1612 if (ret) {
1613 IWL_ERR(mvm,
1614 "Error draining queue before reconfig\n");
1615 return ret;
1616 }
1617
1618 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
1619 mvmsta->sta_id, tid,
1620 buf_size, ssn);
1621 if (ret) {
1622 IWL_ERR(mvm,
1623 "Error reconfiguring TXQ #%d\n", queue);
1624 return ret;
1625 }
1626 }
1627 }
1628
1629 if (alloc_queue)
1630 iwl_mvm_enable_txq(mvm, queue,
1631 vif->hw_queue[tid_to_mac80211_ac[tid]], ssn,
1632 &cfg, wdg_timeout);
1633
1634 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1635 if (ret)
1636 return -EIO;
1637
1638 /* No need to mark as reserved */
1639 spin_lock_bh(&mvm->queue_info_lock);
1640 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1641 spin_unlock_bh(&mvm->queue_info_lock);
1642
1643 /*
1644 * Even though in theory the peer could have different
1645 * aggregation reorder buffer sizes for different sessions,
1646 * our ucode doesn't allow for that and has a global limit
1647 * for each station. Therefore, use the minimum of all the
1648 * aggregation sessions and our default value.
1649 */
1650 mvmsta->max_agg_bufsize =
1651 min(mvmsta->max_agg_bufsize, buf_size);
1652 mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
1653
1654 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
1655 sta->addr, tid);
1656
1657 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false);
1658 }
1659
1660 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1661 struct ieee80211_sta *sta, u16 tid)
1662 {
1663 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1664 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1665 u16 txq_id;
1666 int err;
1667
1668
1669 /*
1670 * If mac80211 is cleaning its state, then say that we finished since
1671 * our state has been cleared anyway.
1672 */
1673 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1674 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1675 return 0;
1676 }
1677
1678 spin_lock_bh(&mvmsta->lock);
1679
1680 txq_id = tid_data->txq_id;
1681
1682 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
1683 mvmsta->sta_id, tid, txq_id, tid_data->state);
1684
1685 mvmsta->agg_tids &= ~BIT(tid);
1686
1687 spin_lock_bh(&mvm->queue_info_lock);
1688 /*
1689 * The TXQ is marked as reserved only if no traffic came through yet
1690 * This means no traffic has been sent on this TID (agg'd or not), so
1691 * we no longer have use for the queue. Since it hasn't even been
1692 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1693 * free.
1694 */
1695 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1696 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1697 spin_unlock_bh(&mvm->queue_info_lock);
1698
1699 switch (tid_data->state) {
1700 case IWL_AGG_ON:
1701 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1702
1703 IWL_DEBUG_TX_QUEUES(mvm,
1704 "ssn = %d, next_recl = %d\n",
1705 tid_data->ssn, tid_data->next_reclaimed);
1706
1707 /* There are still packets for this RA / TID in the HW */
1708 if (tid_data->ssn != tid_data->next_reclaimed) {
1709 tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA;
1710 err = 0;
1711 break;
1712 }
1713
1714 tid_data->ssn = 0xffff;
1715 tid_data->state = IWL_AGG_OFF;
1716 spin_unlock_bh(&mvmsta->lock);
1717
1718 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1719
1720 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1721
1722 if (!iwl_mvm_is_dqa_supported(mvm)) {
1723 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1724
1725 iwl_mvm_disable_txq(mvm, txq_id, mac_queue, tid, 0);
1726 }
1727 return 0;
1728 case IWL_AGG_STARTING:
1729 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1730 /*
1731 * The agg session has been stopped before it was set up. This
1732 * can happen when the AddBA timer times out for example.
1733 */
1734
1735 /* No barriers since we are under mutex */
1736 lockdep_assert_held(&mvm->mutex);
1737
1738 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1739 tid_data->state = IWL_AGG_OFF;
1740 err = 0;
1741 break;
1742 default:
1743 IWL_ERR(mvm,
1744 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
1745 mvmsta->sta_id, tid, tid_data->state);
1746 IWL_ERR(mvm,
1747 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
1748 err = -EINVAL;
1749 }
1750
1751 spin_unlock_bh(&mvmsta->lock);
1752
1753 return err;
1754 }
1755
1756 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1757 struct ieee80211_sta *sta, u16 tid)
1758 {
1759 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1760 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1761 u16 txq_id;
1762 enum iwl_mvm_agg_state old_state;
1763
1764 /*
1765 * First set the agg state to OFF to avoid calling
1766 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
1767 */
1768 spin_lock_bh(&mvmsta->lock);
1769 txq_id = tid_data->txq_id;
1770 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
1771 mvmsta->sta_id, tid, txq_id, tid_data->state);
1772 old_state = tid_data->state;
1773 tid_data->state = IWL_AGG_OFF;
1774 mvmsta->agg_tids &= ~BIT(tid);
1775 spin_unlock_bh(&mvmsta->lock);
1776
1777 spin_lock_bh(&mvm->queue_info_lock);
1778 /*
1779 * The TXQ is marked as reserved only if no traffic came through yet
1780 * This means no traffic has been sent on this TID (agg'd or not), so
1781 * we no longer have use for the queue. Since it hasn't even been
1782 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
1783 * free.
1784 */
1785 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED)
1786 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
1787 spin_unlock_bh(&mvm->queue_info_lock);
1788
1789 if (old_state >= IWL_AGG_ON) {
1790 iwl_mvm_drain_sta(mvm, mvmsta, true);
1791 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
1792 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
1793 iwl_trans_wait_tx_queue_empty(mvm->trans,
1794 mvmsta->tfd_queue_msk);
1795 iwl_mvm_drain_sta(mvm, mvmsta, false);
1796
1797 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
1798
1799 if (!iwl_mvm_is_dqa_supported(mvm)) {
1800 int mac_queue = vif->hw_queue[tid_to_mac80211_ac[tid]];
1801
1802 iwl_mvm_disable_txq(mvm, tid_data->txq_id, mac_queue,
1803 tid, 0);
1804 }
1805 }
1806
1807 return 0;
1808 }
1809
1810 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
1811 {
1812 int i, max = -1, max_offs = -1;
1813
1814 lockdep_assert_held(&mvm->mutex);
1815
1816 /* Pick the unused key offset with the highest 'deleted'
1817 * counter. Every time a key is deleted, all the counters
1818 * are incremented and the one that was just deleted is
1819 * reset to zero. Thus, the highest counter is the one
1820 * that was deleted longest ago. Pick that one.
1821 */
1822 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
1823 if (test_bit(i, mvm->fw_key_table))
1824 continue;
1825 if (mvm->fw_key_deleted[i] > max) {
1826 max = mvm->fw_key_deleted[i];
1827 max_offs = i;
1828 }
1829 }
1830
1831 if (max_offs < 0)
1832 return STA_KEY_IDX_INVALID;
1833
1834 return max_offs;
1835 }
1836
1837 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
1838 struct ieee80211_vif *vif,
1839 struct ieee80211_sta *sta)
1840 {
1841 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1842
1843 if (sta)
1844 return iwl_mvm_sta_from_mac80211(sta);
1845
1846 /*
1847 * The device expects GTKs for station interfaces to be
1848 * installed as GTKs for the AP station. If we have no
1849 * station ID, then use AP's station ID.
1850 */
1851 if (vif->type == NL80211_IFTYPE_STATION &&
1852 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1853 u8 sta_id = mvmvif->ap_sta_id;
1854
1855 /*
1856 * It is possible that the 'sta' parameter is NULL,
1857 * for example when a GTK is removed - the sta_id will then
1858 * be the AP ID, and no station was passed by mac80211.
1859 */
1860 return iwl_mvm_sta_from_staid_protected(mvm, sta_id);
1861 }
1862
1863 return NULL;
1864 }
1865
1866 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
1867 struct iwl_mvm_sta *mvm_sta,
1868 struct ieee80211_key_conf *keyconf, bool mcast,
1869 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
1870 u8 key_offset)
1871 {
1872 struct iwl_mvm_add_sta_key_cmd cmd = {};
1873 __le16 key_flags;
1874 int ret;
1875 u32 status;
1876 u16 keyidx;
1877 int i;
1878 u8 sta_id = mvm_sta->sta_id;
1879
1880 keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
1881 STA_KEY_FLG_KEYID_MSK;
1882 key_flags = cpu_to_le16(keyidx);
1883 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
1884
1885 switch (keyconf->cipher) {
1886 case WLAN_CIPHER_SUITE_TKIP:
1887 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
1888 cmd.tkip_rx_tsc_byte2 = tkip_iv32;
1889 for (i = 0; i < 5; i++)
1890 cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1891 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1892 break;
1893 case WLAN_CIPHER_SUITE_CCMP:
1894 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
1895 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1896 break;
1897 case WLAN_CIPHER_SUITE_WEP104:
1898 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
1899 /* fall through */
1900 case WLAN_CIPHER_SUITE_WEP40:
1901 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
1902 memcpy(cmd.key + 3, keyconf->key, keyconf->keylen);
1903 break;
1904 default:
1905 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
1906 memcpy(cmd.key, keyconf->key, keyconf->keylen);
1907 }
1908
1909 if (mcast)
1910 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
1911
1912 cmd.key_offset = key_offset;
1913 cmd.key_flags = key_flags;
1914 cmd.sta_id = sta_id;
1915
1916 status = ADD_STA_SUCCESS;
1917 if (cmd_flags & CMD_ASYNC)
1918 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC,
1919 sizeof(cmd), &cmd);
1920 else
1921 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
1922 &cmd, &status);
1923
1924 switch (status) {
1925 case ADD_STA_SUCCESS:
1926 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
1927 break;
1928 default:
1929 ret = -EIO;
1930 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
1931 break;
1932 }
1933
1934 return ret;
1935 }
1936
1937 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
1938 struct ieee80211_key_conf *keyconf,
1939 u8 sta_id, bool remove_key)
1940 {
1941 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
1942
1943 /* verify the key details match the required command's expectations */
1944 if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) ||
1945 (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
1946 (keyconf->keyidx != 4 && keyconf->keyidx != 5)))
1947 return -EINVAL;
1948
1949 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
1950 igtk_cmd.sta_id = cpu_to_le32(sta_id);
1951
1952 if (remove_key) {
1953 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
1954 } else {
1955 struct ieee80211_key_seq seq;
1956 const u8 *pn;
1957
1958 memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen);
1959 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1960 pn = seq.aes_cmac.pn;
1961 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
1962 ((u64) pn[4] << 8) |
1963 ((u64) pn[3] << 16) |
1964 ((u64) pn[2] << 24) |
1965 ((u64) pn[1] << 32) |
1966 ((u64) pn[0] << 40));
1967 }
1968
1969 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
1970 remove_key ? "removing" : "installing",
1971 igtk_cmd.sta_id);
1972
1973 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
1974 sizeof(igtk_cmd), &igtk_cmd);
1975 }
1976
1977
1978 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
1979 struct ieee80211_vif *vif,
1980 struct ieee80211_sta *sta)
1981 {
1982 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1983
1984 if (sta)
1985 return sta->addr;
1986
1987 if (vif->type == NL80211_IFTYPE_STATION &&
1988 mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1989 u8 sta_id = mvmvif->ap_sta_id;
1990 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1991 lockdep_is_held(&mvm->mutex));
1992 return sta->addr;
1993 }
1994
1995
1996 return NULL;
1997 }
1998
1999 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2000 struct ieee80211_vif *vif,
2001 struct ieee80211_sta *sta,
2002 struct ieee80211_key_conf *keyconf,
2003 u8 key_offset,
2004 bool mcast)
2005 {
2006 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2007 int ret;
2008 const u8 *addr;
2009 struct ieee80211_key_seq seq;
2010 u16 p1k[5];
2011
2012 switch (keyconf->cipher) {
2013 case WLAN_CIPHER_SUITE_TKIP:
2014 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
2015 /* get phase 1 key from mac80211 */
2016 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
2017 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
2018 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2019 seq.tkip.iv32, p1k, 0, key_offset);
2020 break;
2021 case WLAN_CIPHER_SUITE_CCMP:
2022 case WLAN_CIPHER_SUITE_WEP40:
2023 case WLAN_CIPHER_SUITE_WEP104:
2024 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2025 0, NULL, 0, key_offset);
2026 break;
2027 default:
2028 ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2029 0, NULL, 0, key_offset);
2030 }
2031
2032 return ret;
2033 }
2034
2035 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2036 struct ieee80211_key_conf *keyconf,
2037 bool mcast)
2038 {
2039 struct iwl_mvm_add_sta_key_cmd cmd = {};
2040 __le16 key_flags;
2041 int ret;
2042 u32 status;
2043
2044 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2045 STA_KEY_FLG_KEYID_MSK);
2046 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2047 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2048
2049 if (mcast)
2050 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2051
2052 cmd.key_flags = key_flags;
2053 cmd.key_offset = keyconf->hw_key_idx;
2054 cmd.sta_id = sta_id;
2055
2056 status = ADD_STA_SUCCESS;
2057 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd),
2058 &cmd, &status);
2059
2060 switch (status) {
2061 case ADD_STA_SUCCESS:
2062 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2063 break;
2064 default:
2065 ret = -EIO;
2066 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2067 break;
2068 }
2069
2070 return ret;
2071 }
2072
2073 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
2074 struct ieee80211_vif *vif,
2075 struct ieee80211_sta *sta,
2076 struct ieee80211_key_conf *keyconf,
2077 u8 key_offset)
2078 {
2079 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2080 struct iwl_mvm_sta *mvm_sta;
2081 u8 sta_id;
2082 int ret;
2083 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
2084
2085 lockdep_assert_held(&mvm->mutex);
2086
2087 /* Get the station id from the mvm local station table */
2088 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2089 if (!mvm_sta) {
2090 IWL_ERR(mvm, "Failed to find station\n");
2091 return -EINVAL;
2092 }
2093 sta_id = mvm_sta->sta_id;
2094
2095 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) {
2096 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
2097 goto end;
2098 }
2099
2100 /*
2101 * It is possible that the 'sta' parameter is NULL, and thus
2102 * there is a need to retrieve the sta from the local station table.
2103 */
2104 if (!sta) {
2105 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
2106 lockdep_is_held(&mvm->mutex));
2107 if (IS_ERR_OR_NULL(sta)) {
2108 IWL_ERR(mvm, "Invalid station id\n");
2109 return -EINVAL;
2110 }
2111 }
2112
2113 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
2114 return -EINVAL;
2115
2116 /* If the key_offset is not pre-assigned, we need to find a
2117 * new offset to use. In normal cases, the offset is not
2118 * pre-assigned, but during HW_RESTART we want to reuse the
2119 * same indices, so we pass them when this function is called.
2120 *
2121 * In D3 entry, we need to hardcoded the indices (because the
2122 * firmware hardcodes the PTK offset to 0). In this case, we
2123 * need to make sure we don't overwrite the hw_key_idx in the
2124 * keyconf structure, because otherwise we cannot configure
2125 * the original ones back when resuming.
2126 */
2127 if (key_offset == STA_KEY_IDX_INVALID) {
2128 key_offset = iwl_mvm_set_fw_key_idx(mvm);
2129 if (key_offset == STA_KEY_IDX_INVALID)
2130 return -ENOSPC;
2131 keyconf->hw_key_idx = key_offset;
2132 }
2133
2134 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
2135 if (ret)
2136 goto end;
2137
2138 /*
2139 * For WEP, the same key is used for multicast and unicast. Upload it
2140 * again, using the same key offset, and now pointing the other one
2141 * to the same key slot (offset).
2142 * If this fails, remove the original as well.
2143 */
2144 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2145 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) {
2146 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
2147 key_offset, !mcast);
2148 if (ret) {
2149 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2150 goto end;
2151 }
2152 }
2153
2154 __set_bit(key_offset, mvm->fw_key_table);
2155
2156 end:
2157 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
2158 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
2159 sta ? sta->addr : zero_addr, ret);
2160 return ret;
2161 }
2162
2163 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
2164 struct ieee80211_vif *vif,
2165 struct ieee80211_sta *sta,
2166 struct ieee80211_key_conf *keyconf)
2167 {
2168 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2169 struct iwl_mvm_sta *mvm_sta;
2170 u8 sta_id = IWL_MVM_STATION_COUNT;
2171 int ret, i;
2172
2173 lockdep_assert_held(&mvm->mutex);
2174
2175 /* Get the station from the mvm local station table */
2176 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2177
2178 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
2179 keyconf->keyidx, sta_id);
2180
2181 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2182 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
2183
2184 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
2185 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
2186 keyconf->hw_key_idx);
2187 return -ENOENT;
2188 }
2189
2190 /* track which key was deleted last */
2191 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
2192 if (mvm->fw_key_deleted[i] < U8_MAX)
2193 mvm->fw_key_deleted[i]++;
2194 }
2195 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
2196
2197 if (!mvm_sta) {
2198 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
2199 return 0;
2200 }
2201
2202 sta_id = mvm_sta->sta_id;
2203
2204 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
2205 if (ret)
2206 return ret;
2207
2208 /* delete WEP key twice to get rid of (now useless) offset */
2209 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
2210 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
2211 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
2212
2213 return ret;
2214 }
2215
2216 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
2217 struct ieee80211_vif *vif,
2218 struct ieee80211_key_conf *keyconf,
2219 struct ieee80211_sta *sta, u32 iv32,
2220 u16 *phase1key)
2221 {
2222 struct iwl_mvm_sta *mvm_sta;
2223 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
2224
2225 rcu_read_lock();
2226
2227 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
2228 if (WARN_ON_ONCE(!mvm_sta))
2229 goto unlock;
2230 iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast,
2231 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx);
2232
2233 unlock:
2234 rcu_read_unlock();
2235 }
2236
2237 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
2238 struct ieee80211_sta *sta)
2239 {
2240 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2241 struct iwl_mvm_add_sta_cmd cmd = {
2242 .add_modify = STA_MODE_MODIFY,
2243 .sta_id = mvmsta->sta_id,
2244 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
2245 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2246 };
2247 int ret;
2248
2249 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2250 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2251 if (ret)
2252 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2253 }
2254
2255 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
2256 struct ieee80211_sta *sta,
2257 enum ieee80211_frame_release_type reason,
2258 u16 cnt, u16 tids, bool more_data,
2259 bool agg)
2260 {
2261 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2262 struct iwl_mvm_add_sta_cmd cmd = {
2263 .add_modify = STA_MODE_MODIFY,
2264 .sta_id = mvmsta->sta_id,
2265 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
2266 .sleep_tx_count = cpu_to_le16(cnt),
2267 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2268 };
2269 int tid, ret;
2270 unsigned long _tids = tids;
2271
2272 /* convert TIDs to ACs - we don't support TSPEC so that's OK
2273 * Note that this field is reserved and unused by firmware not
2274 * supporting GO uAPSD, so it's safe to always do this.
2275 */
2276 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
2277 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
2278
2279 /* If we're releasing frames from aggregation queues then check if the
2280 * all queues combined that we're releasing frames from have
2281 * - more frames than the service period, in which case more_data
2282 * needs to be set
2283 * - fewer than 'cnt' frames, in which case we need to adjust the
2284 * firmware command (but do that unconditionally)
2285 */
2286 if (agg) {
2287 int remaining = cnt;
2288 int sleep_tx_count;
2289
2290 spin_lock_bh(&mvmsta->lock);
2291 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
2292 struct iwl_mvm_tid_data *tid_data;
2293 u16 n_queued;
2294
2295 tid_data = &mvmsta->tid_data[tid];
2296 if (WARN(tid_data->state != IWL_AGG_ON &&
2297 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA,
2298 "TID %d state is %d\n",
2299 tid, tid_data->state)) {
2300 spin_unlock_bh(&mvmsta->lock);
2301 ieee80211_sta_eosp(sta);
2302 return;
2303 }
2304
2305 n_queued = iwl_mvm_tid_queued(tid_data);
2306 if (n_queued > remaining) {
2307 more_data = true;
2308 remaining = 0;
2309 break;
2310 }
2311 remaining -= n_queued;
2312 }
2313 sleep_tx_count = cnt - remaining;
2314 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
2315 mvmsta->sleep_tx_count = sleep_tx_count;
2316 spin_unlock_bh(&mvmsta->lock);
2317
2318 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
2319 if (WARN_ON(cnt - remaining == 0)) {
2320 ieee80211_sta_eosp(sta);
2321 return;
2322 }
2323 }
2324
2325 /* Note: this is ignored by firmware not supporting GO uAPSD */
2326 if (more_data)
2327 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA);
2328
2329 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
2330 mvmsta->next_status_eosp = true;
2331 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL);
2332 } else {
2333 cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD);
2334 }
2335
2336 /* block the Tx queues until the FW updated the sleep Tx count */
2337 iwl_trans_block_txq_ptrs(mvm->trans, true);
2338
2339 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
2340 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
2341 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2342 if (ret)
2343 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2344 }
2345
2346 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
2347 struct iwl_rx_cmd_buffer *rxb)
2348 {
2349 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2350 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
2351 struct ieee80211_sta *sta;
2352 u32 sta_id = le32_to_cpu(notif->sta_id);
2353
2354 if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT))
2355 return;
2356
2357 rcu_read_lock();
2358 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2359 if (!IS_ERR_OR_NULL(sta))
2360 ieee80211_sta_eosp(sta);
2361 rcu_read_unlock();
2362 }
2363
2364 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
2365 struct iwl_mvm_sta *mvmsta, bool disable)
2366 {
2367 struct iwl_mvm_add_sta_cmd cmd = {
2368 .add_modify = STA_MODE_MODIFY,
2369 .sta_id = mvmsta->sta_id,
2370 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
2371 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
2372 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
2373 };
2374 int ret;
2375
2376 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
2377 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
2378 if (ret)
2379 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
2380 }
2381
2382 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
2383 struct ieee80211_sta *sta,
2384 bool disable)
2385 {
2386 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2387
2388 spin_lock_bh(&mvm_sta->lock);
2389
2390 if (mvm_sta->disable_tx == disable) {
2391 spin_unlock_bh(&mvm_sta->lock);
2392 return;
2393 }
2394
2395 mvm_sta->disable_tx = disable;
2396
2397 /*
2398 * Tell mac80211 to start/stop queuing tx for this station,
2399 * but don't stop queuing if there are still pending frames
2400 * for this station.
2401 */
2402 if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id]))
2403 ieee80211_sta_block_awake(mvm->hw, sta, disable);
2404
2405 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
2406
2407 spin_unlock_bh(&mvm_sta->lock);
2408 }
2409
2410 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
2411 struct iwl_mvm_vif *mvmvif,
2412 bool disable)
2413 {
2414 struct ieee80211_sta *sta;
2415 struct iwl_mvm_sta *mvm_sta;
2416 int i;
2417
2418 lockdep_assert_held(&mvm->mutex);
2419
2420 /* Block/unblock all the stations of the given mvmvif */
2421 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
2422 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
2423 lockdep_is_held(&mvm->mutex));
2424 if (IS_ERR_OR_NULL(sta))
2425 continue;
2426
2427 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2428 if (mvm_sta->mac_id_n_color !=
2429 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
2430 continue;
2431
2432 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
2433 }
2434 }
2435
2436 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2437 {
2438 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2439 struct iwl_mvm_sta *mvmsta;
2440
2441 rcu_read_lock();
2442
2443 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
2444
2445 if (!WARN_ON(!mvmsta))
2446 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
2447
2448 rcu_read_unlock();
2449 }
Linux kernel - Deliverables
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