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, 2018 - 2020 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 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 * BSD LICENSE
29 *
30 * Copyright(c) 2012 - 2015, 2018 - 2020 Intel Corporation. All rights reserved.
31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 *
39 * * Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * * Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in
43 * the documentation and/or other materials provided with the
44 * distribution.
45 * * Neither the name Intel Corporation nor the names of its
46 * contributors may be used to endorse or promote products derived
47 * from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 *
61 *****************************************************************************/
62 #include <net/mac80211.h>
63
64 #include "mvm.h"
65 #include "sta.h"
66 #include "rs.h"
67
68 /*
69 * New version of ADD_STA_sta command added new fields at the end of the
70 * structure, so sending the size of the relevant API's structure is enough to
71 * support both API versions.
72 */
iwl_mvm_add_sta_cmd_size(struct iwl_mvm * mvm)73 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
74 {
75 if (iwl_mvm_has_new_rx_api(mvm) ||
76 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
77 return sizeof(struct iwl_mvm_add_sta_cmd);
78 else
79 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
80 }
81
iwl_mvm_find_free_sta_id(struct iwl_mvm * mvm,enum nl80211_iftype iftype)82 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
83 enum nl80211_iftype iftype)
84 {
85 int sta_id;
86 u32 reserved_ids = 0;
87
88 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
89 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
90
91 lockdep_assert_held(&mvm->mutex);
92
93 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
94 if (iftype != NL80211_IFTYPE_STATION)
95 reserved_ids = BIT(0);
96
97 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
98 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
99 if (BIT(sta_id) & reserved_ids)
100 continue;
101
102 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
103 lockdep_is_held(&mvm->mutex)))
104 return sta_id;
105 }
106 return IWL_MVM_INVALID_STA;
107 }
108
109 /* send station add/update command to firmware */
iwl_mvm_sta_send_to_fw(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool update,unsigned int flags)110 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
111 bool update, unsigned int flags)
112 {
113 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
114 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
115 .sta_id = mvm_sta->sta_id,
116 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
117 .add_modify = update ? 1 : 0,
118 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
119 STA_FLG_MIMO_EN_MSK |
120 STA_FLG_RTS_MIMO_PROT),
121 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
122 };
123 int ret;
124 u32 status;
125 u32 agg_size = 0, mpdu_dens = 0;
126
127 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
128 add_sta_cmd.station_type = mvm_sta->sta_type;
129
130 if (!update || (flags & STA_MODIFY_QUEUES)) {
131 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
132
133 if (!iwl_mvm_has_new_tx_api(mvm)) {
134 add_sta_cmd.tfd_queue_msk =
135 cpu_to_le32(mvm_sta->tfd_queue_msk);
136
137 if (flags & STA_MODIFY_QUEUES)
138 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
139 } else {
140 WARN_ON(flags & STA_MODIFY_QUEUES);
141 }
142 }
143
144 switch (sta->bandwidth) {
145 case IEEE80211_STA_RX_BW_160:
146 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
147 /* fall through */
148 case IEEE80211_STA_RX_BW_80:
149 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
150 /* fall through */
151 case IEEE80211_STA_RX_BW_40:
152 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
153 /* fall through */
154 case IEEE80211_STA_RX_BW_20:
155 if (sta->ht_cap.ht_supported)
156 add_sta_cmd.station_flags |=
157 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
158 break;
159 }
160
161 switch (sta->rx_nss) {
162 case 1:
163 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
164 break;
165 case 2:
166 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
167 break;
168 case 3 ... 8:
169 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
170 break;
171 }
172
173 switch (sta->smps_mode) {
174 case IEEE80211_SMPS_AUTOMATIC:
175 case IEEE80211_SMPS_NUM_MODES:
176 WARN_ON(1);
177 break;
178 case IEEE80211_SMPS_STATIC:
179 /* override NSS */
180 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
181 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
182 break;
183 case IEEE80211_SMPS_DYNAMIC:
184 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
185 break;
186 case IEEE80211_SMPS_OFF:
187 /* nothing */
188 break;
189 }
190
191 if (sta->ht_cap.ht_supported) {
192 add_sta_cmd.station_flags_msk |=
193 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
194 STA_FLG_AGG_MPDU_DENS_MSK);
195
196 mpdu_dens = sta->ht_cap.ampdu_density;
197 }
198
199
200 if (sta->vht_cap.vht_supported) {
201 agg_size = sta->vht_cap.cap &
202 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
203 agg_size >>=
204 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
205 } else if (sta->ht_cap.ht_supported) {
206 agg_size = sta->ht_cap.ampdu_factor;
207 }
208
209 /* D6.0 10.12.2 A-MPDU length limit rules
210 * A STA indicates the maximum length of the A-MPDU preEOF padding
211 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
212 * Exponent field in its HT Capabilities, VHT Capabilities,
213 * and HE 6 GHz Band Capabilities elements (if present) and the
214 * Maximum AMPDU Length Exponent Extension field in its HE
215 * Capabilities element
216 */
217 if (sta->he_cap.has_he)
218 agg_size += u8_get_bits(sta->he_cap.he_cap_elem.mac_cap_info[3],
219 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
220
221 /* Limit to max A-MPDU supported by FW */
222 if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT))
223 agg_size = (STA_FLG_MAX_AGG_SIZE_4M >>
224 STA_FLG_MAX_AGG_SIZE_SHIFT);
225
226 add_sta_cmd.station_flags |=
227 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
228 add_sta_cmd.station_flags |=
229 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
230 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
231 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
232
233 if (sta->wme) {
234 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
235
236 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
237 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
238 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
239 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
240 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
241 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
242 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
243 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
244 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
245 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
246 }
247
248 status = ADD_STA_SUCCESS;
249 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
250 iwl_mvm_add_sta_cmd_size(mvm),
251 &add_sta_cmd, &status);
252 if (ret)
253 return ret;
254
255 switch (status & IWL_ADD_STA_STATUS_MASK) {
256 case ADD_STA_SUCCESS:
257 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
258 break;
259 default:
260 ret = -EIO;
261 IWL_ERR(mvm, "ADD_STA failed\n");
262 break;
263 }
264
265 return ret;
266 }
267
iwl_mvm_rx_agg_session_expired(struct timer_list * t)268 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
269 {
270 struct iwl_mvm_baid_data *data =
271 from_timer(data, t, session_timer);
272 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
273 struct iwl_mvm_baid_data *ba_data;
274 struct ieee80211_sta *sta;
275 struct iwl_mvm_sta *mvm_sta;
276 unsigned long timeout;
277
278 rcu_read_lock();
279
280 ba_data = rcu_dereference(*rcu_ptr);
281
282 if (WARN_ON(!ba_data))
283 goto unlock;
284
285 if (!ba_data->timeout)
286 goto unlock;
287
288 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
289 if (time_is_after_jiffies(timeout)) {
290 mod_timer(&ba_data->session_timer, timeout);
291 goto unlock;
292 }
293
294 /* Timer expired */
295 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
296
297 /*
298 * sta should be valid unless the following happens:
299 * The firmware asserts which triggers a reconfig flow, but
300 * the reconfig fails before we set the pointer to sta into
301 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
302 * A-MDPU and hence the timer continues to run. Then, the
303 * timer expires and sta is NULL.
304 */
305 if (!sta)
306 goto unlock;
307
308 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
309 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
310 sta->addr, ba_data->tid);
311 unlock:
312 rcu_read_unlock();
313 }
314
315 /* Disable aggregations for a bitmap of TIDs for a given station */
iwl_mvm_invalidate_sta_queue(struct iwl_mvm * mvm,int queue,unsigned long disable_agg_tids,bool remove_queue)316 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
317 unsigned long disable_agg_tids,
318 bool remove_queue)
319 {
320 struct iwl_mvm_add_sta_cmd cmd = {};
321 struct ieee80211_sta *sta;
322 struct iwl_mvm_sta *mvmsta;
323 u32 status;
324 u8 sta_id;
325
326 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
327 return -EINVAL;
328
329 sta_id = mvm->queue_info[queue].ra_sta_id;
330
331 rcu_read_lock();
332
333 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
334
335 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
336 rcu_read_unlock();
337 return -EINVAL;
338 }
339
340 mvmsta = iwl_mvm_sta_from_mac80211(sta);
341
342 mvmsta->tid_disable_agg |= disable_agg_tids;
343
344 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
345 cmd.sta_id = mvmsta->sta_id;
346 cmd.add_modify = STA_MODE_MODIFY;
347 cmd.modify_mask = STA_MODIFY_QUEUES;
348 if (disable_agg_tids)
349 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
350 if (remove_queue)
351 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
352 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
353 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
354
355 rcu_read_unlock();
356
357 /* Notify FW of queue removal from the STA queues */
358 status = ADD_STA_SUCCESS;
359 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
360 iwl_mvm_add_sta_cmd_size(mvm),
361 &cmd, &status);
362 }
363
iwl_mvm_disable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u16 * queueptr,u8 tid,u8 flags)364 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
365 u16 *queueptr, u8 tid, u8 flags)
366 {
367 int queue = *queueptr;
368 struct iwl_scd_txq_cfg_cmd cmd = {
369 .scd_queue = queue,
370 .action = SCD_CFG_DISABLE_QUEUE,
371 };
372 int ret;
373
374 if (iwl_mvm_has_new_tx_api(mvm)) {
375 iwl_trans_txq_free(mvm->trans, queue);
376 *queueptr = IWL_MVM_INVALID_QUEUE;
377
378 return 0;
379 }
380
381 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
382 return 0;
383
384 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
385
386 cmd.action = mvm->queue_info[queue].tid_bitmap ?
387 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
388 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
389 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
390
391 IWL_DEBUG_TX_QUEUES(mvm,
392 "Disabling TXQ #%d tids=0x%x\n",
393 queue,
394 mvm->queue_info[queue].tid_bitmap);
395
396 /* If the queue is still enabled - nothing left to do in this func */
397 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
398 return 0;
399
400 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
401 cmd.tid = mvm->queue_info[queue].txq_tid;
402
403 /* Make sure queue info is correct even though we overwrite it */
404 WARN(mvm->queue_info[queue].tid_bitmap,
405 "TXQ #%d info out-of-sync - tids=0x%x\n",
406 queue, mvm->queue_info[queue].tid_bitmap);
407
408 /* If we are here - the queue is freed and we can zero out these vals */
409 mvm->queue_info[queue].tid_bitmap = 0;
410
411 if (sta) {
412 struct iwl_mvm_txq *mvmtxq =
413 iwl_mvm_txq_from_tid(sta, tid);
414
415 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
416 }
417
418 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
419 mvm->queue_info[queue].reserved = false;
420
421 iwl_trans_txq_disable(mvm->trans, queue, false);
422 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
423 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
424
425 if (ret)
426 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
427 queue, ret);
428 return ret;
429 }
430
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)431 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
432 {
433 struct ieee80211_sta *sta;
434 struct iwl_mvm_sta *mvmsta;
435 unsigned long tid_bitmap;
436 unsigned long agg_tids = 0;
437 u8 sta_id;
438 int tid;
439
440 lockdep_assert_held(&mvm->mutex);
441
442 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
443 return -EINVAL;
444
445 sta_id = mvm->queue_info[queue].ra_sta_id;
446 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
447
448 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
449 lockdep_is_held(&mvm->mutex));
450
451 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
452 return -EINVAL;
453
454 mvmsta = iwl_mvm_sta_from_mac80211(sta);
455
456 spin_lock_bh(&mvmsta->lock);
457 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
458 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
459 agg_tids |= BIT(tid);
460 }
461 spin_unlock_bh(&mvmsta->lock);
462
463 return agg_tids;
464 }
465
466 /*
467 * Remove a queue from a station's resources.
468 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
469 * doesn't disable the queue
470 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)471 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
472 {
473 struct ieee80211_sta *sta;
474 struct iwl_mvm_sta *mvmsta;
475 unsigned long tid_bitmap;
476 unsigned long disable_agg_tids = 0;
477 u8 sta_id;
478 int tid;
479
480 lockdep_assert_held(&mvm->mutex);
481
482 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
483 return -EINVAL;
484
485 sta_id = mvm->queue_info[queue].ra_sta_id;
486 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
487
488 rcu_read_lock();
489
490 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
491
492 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
493 rcu_read_unlock();
494 return 0;
495 }
496
497 mvmsta = iwl_mvm_sta_from_mac80211(sta);
498
499 spin_lock_bh(&mvmsta->lock);
500 /* Unmap MAC queues and TIDs from this queue */
501 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
502 struct iwl_mvm_txq *mvmtxq =
503 iwl_mvm_txq_from_tid(sta, tid);
504
505 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
506 disable_agg_tids |= BIT(tid);
507 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
508
509 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
510 }
511
512 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
513 spin_unlock_bh(&mvmsta->lock);
514
515 rcu_read_unlock();
516
517 /*
518 * The TX path may have been using this TXQ_ID from the tid_data,
519 * so make sure it's no longer running so that we can safely reuse
520 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
521 * above, but nothing guarantees we've stopped using them. Thus,
522 * without this, we could get to iwl_mvm_disable_txq() and remove
523 * the queue while still sending frames to it.
524 */
525 synchronize_net();
526
527 return disable_agg_tids;
528 }
529
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,struct ieee80211_sta * old_sta,u8 new_sta_id)530 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
531 struct ieee80211_sta *old_sta,
532 u8 new_sta_id)
533 {
534 struct iwl_mvm_sta *mvmsta;
535 u8 sta_id, tid;
536 unsigned long disable_agg_tids = 0;
537 bool same_sta;
538 u16 queue_tmp = queue;
539 int ret;
540
541 lockdep_assert_held(&mvm->mutex);
542
543 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
544 return -EINVAL;
545
546 sta_id = mvm->queue_info[queue].ra_sta_id;
547 tid = mvm->queue_info[queue].txq_tid;
548
549 same_sta = sta_id == new_sta_id;
550
551 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
552 if (WARN_ON(!mvmsta))
553 return -EINVAL;
554
555 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
556 /* Disable the queue */
557 if (disable_agg_tids)
558 iwl_mvm_invalidate_sta_queue(mvm, queue,
559 disable_agg_tids, false);
560
561 ret = iwl_mvm_disable_txq(mvm, old_sta, &queue_tmp, tid, 0);
562 if (ret) {
563 IWL_ERR(mvm,
564 "Failed to free inactive queue %d (ret=%d)\n",
565 queue, ret);
566
567 return ret;
568 }
569
570 /* If TXQ is allocated to another STA, update removal in FW */
571 if (!same_sta)
572 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
573
574 return 0;
575 }
576
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)577 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
578 unsigned long tfd_queue_mask, u8 ac)
579 {
580 int queue = 0;
581 u8 ac_to_queue[IEEE80211_NUM_ACS];
582 int i;
583
584 /*
585 * This protects us against grabbing a queue that's being reconfigured
586 * by the inactivity checker.
587 */
588 lockdep_assert_held(&mvm->mutex);
589
590 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
591 return -EINVAL;
592
593 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
594
595 /* See what ACs the existing queues for this STA have */
596 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
597 /* Only DATA queues can be shared */
598 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
599 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
600 continue;
601
602 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
603 }
604
605 /*
606 * The queue to share is chosen only from DATA queues as follows (in
607 * descending priority):
608 * 1. An AC_BE queue
609 * 2. Same AC queue
610 * 3. Highest AC queue that is lower than new AC
611 * 4. Any existing AC (there always is at least 1 DATA queue)
612 */
613
614 /* Priority 1: An AC_BE queue */
615 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
616 queue = ac_to_queue[IEEE80211_AC_BE];
617 /* Priority 2: Same AC queue */
618 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
619 queue = ac_to_queue[ac];
620 /* Priority 3a: If new AC is VO and VI exists - use VI */
621 else if (ac == IEEE80211_AC_VO &&
622 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
623 queue = ac_to_queue[IEEE80211_AC_VI];
624 /* Priority 3b: No BE so only AC less than the new one is BK */
625 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
626 queue = ac_to_queue[IEEE80211_AC_BK];
627 /* Priority 4a: No BE nor BK - use VI if exists */
628 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
629 queue = ac_to_queue[IEEE80211_AC_VI];
630 /* Priority 4b: No BE, BK nor VI - use VO if exists */
631 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
632 queue = ac_to_queue[IEEE80211_AC_VO];
633
634 /* Make sure queue found (or not) is legal */
635 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
636 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
637 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
638 IWL_ERR(mvm, "No DATA queues available to share\n");
639 return -ENOSPC;
640 }
641
642 return queue;
643 }
644
645 /*
646 * If a given queue has a higher AC than the TID stream that is being compared
647 * to, the queue needs to be redirected to the lower AC. This function does that
648 * in such a case, otherwise - if no redirection required - it does nothing,
649 * unless the %force param is true.
650 */
iwl_mvm_redirect_queue(struct iwl_mvm * mvm,int queue,int tid,int ac,int ssn,unsigned int wdg_timeout,bool force,struct iwl_mvm_txq * txq)651 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
652 int ac, int ssn, unsigned int wdg_timeout,
653 bool force, struct iwl_mvm_txq *txq)
654 {
655 struct iwl_scd_txq_cfg_cmd cmd = {
656 .scd_queue = queue,
657 .action = SCD_CFG_DISABLE_QUEUE,
658 };
659 bool shared_queue;
660 int ret;
661
662 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
663 return -EINVAL;
664
665 /*
666 * If the AC is lower than current one - FIFO needs to be redirected to
667 * the lowest one of the streams in the queue. Check if this is needed
668 * here.
669 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
670 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
671 * we need to check if the numerical value of X is LARGER than of Y.
672 */
673 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
674 IWL_DEBUG_TX_QUEUES(mvm,
675 "No redirection needed on TXQ #%d\n",
676 queue);
677 return 0;
678 }
679
680 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
681 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
682 cmd.tid = mvm->queue_info[queue].txq_tid;
683 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
684
685 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
686 queue, iwl_mvm_ac_to_tx_fifo[ac]);
687
688 /* Stop the queue and wait for it to empty */
689 txq->stopped = true;
690
691 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
692 if (ret) {
693 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
694 queue);
695 ret = -EIO;
696 goto out;
697 }
698
699 /* Before redirecting the queue we need to de-activate it */
700 iwl_trans_txq_disable(mvm->trans, queue, false);
701 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
702 if (ret)
703 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
704 ret);
705
706 /* Make sure the SCD wrptr is correctly set before reconfiguring */
707 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
708
709 /* Update the TID "owner" of the queue */
710 mvm->queue_info[queue].txq_tid = tid;
711
712 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
713
714 /* Redirect to lower AC */
715 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
716 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
717
718 /* Update AC marking of the queue */
719 mvm->queue_info[queue].mac80211_ac = ac;
720
721 /*
722 * Mark queue as shared in transport if shared
723 * Note this has to be done after queue enablement because enablement
724 * can also set this value, and there is no indication there to shared
725 * queues
726 */
727 if (shared_queue)
728 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
729
730 out:
731 /* Continue using the queue */
732 txq->stopped = false;
733
734 return ret;
735 }
736
iwl_mvm_find_free_queue(struct iwl_mvm * mvm,u8 sta_id,u8 minq,u8 maxq)737 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
738 u8 minq, u8 maxq)
739 {
740 int i;
741
742 lockdep_assert_held(&mvm->mutex);
743
744 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
745 "max queue %d >= num_of_queues (%d)", maxq,
746 mvm->trans->trans_cfg->base_params->num_of_queues))
747 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
748
749 /* This should not be hit with new TX path */
750 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
751 return -ENOSPC;
752
753 /* Start by looking for a free queue */
754 for (i = minq; i <= maxq; i++)
755 if (mvm->queue_info[i].tid_bitmap == 0 &&
756 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
757 return i;
758
759 return -ENOSPC;
760 }
761
iwl_mvm_tvqm_enable_txq(struct iwl_mvm * mvm,u8 sta_id,u8 tid,unsigned int timeout)762 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
763 u8 sta_id, u8 tid, unsigned int timeout)
764 {
765 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE,
766 mvm->trans->cfg->min_256_ba_txq_size);
767
768 if (tid == IWL_MAX_TID_COUNT) {
769 tid = IWL_MGMT_TID;
770 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
771 mvm->trans->cfg->min_txq_size);
772 }
773
774 do {
775 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE);
776
777 queue = iwl_trans_txq_alloc(mvm->trans, enable,
778 sta_id, tid, SCD_QUEUE_CFG,
779 size, timeout);
780
781 if (queue < 0)
782 IWL_DEBUG_TX_QUEUES(mvm,
783 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n",
784 size, sta_id, tid, queue);
785 size /= 2;
786 } while (queue < 0 && size >= 16);
787
788 if (queue < 0)
789 return queue;
790
791 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
792 queue, sta_id, tid);
793
794 return queue;
795 }
796
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)797 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
798 struct ieee80211_sta *sta, u8 ac,
799 int tid)
800 {
801 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
802 struct iwl_mvm_txq *mvmtxq =
803 iwl_mvm_txq_from_tid(sta, tid);
804 unsigned int wdg_timeout =
805 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
806 int queue = -1;
807
808 lockdep_assert_held(&mvm->mutex);
809
810 IWL_DEBUG_TX_QUEUES(mvm,
811 "Allocating queue for sta %d on tid %d\n",
812 mvmsta->sta_id, tid);
813 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
814 if (queue < 0)
815 return queue;
816
817 mvmtxq->txq_id = queue;
818 mvm->tvqm_info[queue].txq_tid = tid;
819 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;
820
821 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
822
823 spin_lock_bh(&mvmsta->lock);
824 mvmsta->tid_data[tid].txq_id = queue;
825 spin_unlock_bh(&mvmsta->lock);
826
827 return 0;
828 }
829
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)830 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
831 struct ieee80211_sta *sta,
832 int queue, u8 sta_id, u8 tid)
833 {
834 bool enable_queue = true;
835
836 /* Make sure this TID isn't already enabled */
837 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
838 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
839 queue, tid);
840 return false;
841 }
842
843 /* Update mappings and refcounts */
844 if (mvm->queue_info[queue].tid_bitmap)
845 enable_queue = false;
846
847 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
848 mvm->queue_info[queue].ra_sta_id = sta_id;
849
850 if (enable_queue) {
851 if (tid != IWL_MAX_TID_COUNT)
852 mvm->queue_info[queue].mac80211_ac =
853 tid_to_mac80211_ac[tid];
854 else
855 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
856
857 mvm->queue_info[queue].txq_tid = tid;
858 }
859
860 if (sta) {
861 struct iwl_mvm_txq *mvmtxq =
862 iwl_mvm_txq_from_tid(sta, tid);
863
864 mvmtxq->txq_id = queue;
865 }
866
867 IWL_DEBUG_TX_QUEUES(mvm,
868 "Enabling TXQ #%d tids=0x%x\n",
869 queue, mvm->queue_info[queue].tid_bitmap);
870
871 return enable_queue;
872 }
873
iwl_mvm_enable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u16 ssn,const struct iwl_trans_txq_scd_cfg * cfg,unsigned int wdg_timeout)874 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
875 int queue, u16 ssn,
876 const struct iwl_trans_txq_scd_cfg *cfg,
877 unsigned int wdg_timeout)
878 {
879 struct iwl_scd_txq_cfg_cmd cmd = {
880 .scd_queue = queue,
881 .action = SCD_CFG_ENABLE_QUEUE,
882 .window = cfg->frame_limit,
883 .sta_id = cfg->sta_id,
884 .ssn = cpu_to_le16(ssn),
885 .tx_fifo = cfg->fifo,
886 .aggregate = cfg->aggregate,
887 .tid = cfg->tid,
888 };
889 bool inc_ssn;
890
891 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
892 return false;
893
894 /* Send the enabling command if we need to */
895 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
896 return false;
897
898 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
899 NULL, wdg_timeout);
900 if (inc_ssn)
901 le16_add_cpu(&cmd.ssn, 1);
902
903 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
904 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
905
906 return inc_ssn;
907 }
908
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)909 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
910 {
911 struct iwl_scd_txq_cfg_cmd cmd = {
912 .scd_queue = queue,
913 .action = SCD_CFG_UPDATE_QUEUE_TID,
914 };
915 int tid;
916 unsigned long tid_bitmap;
917 int ret;
918
919 lockdep_assert_held(&mvm->mutex);
920
921 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
922 return;
923
924 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
925
926 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
927 return;
928
929 /* Find any TID for queue */
930 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
931 cmd.tid = tid;
932 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
933
934 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
935 if (ret) {
936 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
937 queue, ret);
938 return;
939 }
940
941 mvm->queue_info[queue].txq_tid = tid;
942 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
943 queue, tid);
944 }
945
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)946 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
947 {
948 struct ieee80211_sta *sta;
949 struct iwl_mvm_sta *mvmsta;
950 u8 sta_id;
951 int tid = -1;
952 unsigned long tid_bitmap;
953 unsigned int wdg_timeout;
954 int ssn;
955 int ret = true;
956
957 /* queue sharing is disabled on new TX path */
958 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
959 return;
960
961 lockdep_assert_held(&mvm->mutex);
962
963 sta_id = mvm->queue_info[queue].ra_sta_id;
964 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
965
966 /* Find TID for queue, and make sure it is the only one on the queue */
967 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
968 if (tid_bitmap != BIT(tid)) {
969 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
970 queue, tid_bitmap);
971 return;
972 }
973
974 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
975 tid);
976
977 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
978 lockdep_is_held(&mvm->mutex));
979
980 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
981 return;
982
983 mvmsta = iwl_mvm_sta_from_mac80211(sta);
984 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
985
986 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
987
988 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
989 tid_to_mac80211_ac[tid], ssn,
990 wdg_timeout, true,
991 iwl_mvm_txq_from_tid(sta, tid));
992 if (ret) {
993 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
994 return;
995 }
996
997 /* If aggs should be turned back on - do it */
998 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
999 struct iwl_mvm_add_sta_cmd cmd = {0};
1000
1001 mvmsta->tid_disable_agg &= ~BIT(tid);
1002
1003 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1004 cmd.sta_id = mvmsta->sta_id;
1005 cmd.add_modify = STA_MODE_MODIFY;
1006 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1007 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1008 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1009
1010 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1011 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1012 if (!ret) {
1013 IWL_DEBUG_TX_QUEUES(mvm,
1014 "TXQ #%d is now aggregated again\n",
1015 queue);
1016
1017 /* Mark queue intenally as aggregating again */
1018 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1019 }
1020 }
1021
1022 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1023 }
1024
1025 /*
1026 * Remove inactive TIDs of a given queue.
1027 * If all queue TIDs are inactive - mark the queue as inactive
1028 * If only some the queue TIDs are inactive - unmap them from the queue
1029 *
1030 * Returns %true if all TIDs were removed and the queue could be reused.
1031 */
iwl_mvm_remove_inactive_tids(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,int queue,unsigned long tid_bitmap,unsigned long * unshare_queues,unsigned long * changetid_queues)1032 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1033 struct iwl_mvm_sta *mvmsta, int queue,
1034 unsigned long tid_bitmap,
1035 unsigned long *unshare_queues,
1036 unsigned long *changetid_queues)
1037 {
1038 int tid;
1039
1040 lockdep_assert_held(&mvmsta->lock);
1041 lockdep_assert_held(&mvm->mutex);
1042
1043 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1044 return false;
1045
1046 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1047 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1048 /* If some TFDs are still queued - don't mark TID as inactive */
1049 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1050 tid_bitmap &= ~BIT(tid);
1051
1052 /* Don't mark as inactive any TID that has an active BA */
1053 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1054 tid_bitmap &= ~BIT(tid);
1055 }
1056
1057 /* If all TIDs in the queue are inactive - return it can be reused */
1058 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1059 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1060 return true;
1061 }
1062
1063 /*
1064 * If we are here, this is a shared queue and not all TIDs timed-out.
1065 * Remove the ones that did.
1066 */
1067 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1068 u16 tid_bitmap;
1069
1070 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1071 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1072
1073 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1074
1075 /*
1076 * We need to take into account a situation in which a TXQ was
1077 * allocated to TID x, and then turned shared by adding TIDs y
1078 * and z. If TID x becomes inactive and is removed from the TXQ,
1079 * ownership must be given to one of the remaining TIDs.
1080 * This is mainly because if TID x continues - a new queue can't
1081 * be allocated for it as long as it is an owner of another TXQ.
1082 *
1083 * Mark this queue in the right bitmap, we'll send the command
1084 * to the firmware later.
1085 */
1086 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1087 set_bit(queue, changetid_queues);
1088
1089 IWL_DEBUG_TX_QUEUES(mvm,
1090 "Removing inactive TID %d from shared Q:%d\n",
1091 tid, queue);
1092 }
1093
1094 IWL_DEBUG_TX_QUEUES(mvm,
1095 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1096 mvm->queue_info[queue].tid_bitmap);
1097
1098 /*
1099 * There may be different TIDs with the same mac queues, so make
1100 * sure all TIDs have existing corresponding mac queues enabled
1101 */
1102 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1103
1104 /* If the queue is marked as shared - "unshare" it */
1105 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1106 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1107 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1108 queue);
1109 set_bit(queue, unshare_queues);
1110 }
1111
1112 return false;
1113 }
1114
1115 /*
1116 * Check for inactivity - this includes checking if any queue
1117 * can be unshared and finding one (and only one) that can be
1118 * reused.
1119 * This function is also invoked as a sort of clean-up task,
1120 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1121 *
1122 * Returns the queue number, or -ENOSPC.
1123 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1124 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1125 {
1126 unsigned long now = jiffies;
1127 unsigned long unshare_queues = 0;
1128 unsigned long changetid_queues = 0;
1129 int i, ret, free_queue = -ENOSPC;
1130 struct ieee80211_sta *queue_owner = NULL;
1131
1132 lockdep_assert_held(&mvm->mutex);
1133
1134 if (iwl_mvm_has_new_tx_api(mvm))
1135 return -ENOSPC;
1136
1137 rcu_read_lock();
1138
1139 /* we skip the CMD queue below by starting at 1 */
1140 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1141
1142 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1143 struct ieee80211_sta *sta;
1144 struct iwl_mvm_sta *mvmsta;
1145 u8 sta_id;
1146 int tid;
1147 unsigned long inactive_tid_bitmap = 0;
1148 unsigned long queue_tid_bitmap;
1149
1150 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1151 if (!queue_tid_bitmap)
1152 continue;
1153
1154 /* If TXQ isn't in active use anyway - nothing to do here... */
1155 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1156 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1157 continue;
1158
1159 /* Check to see if there are inactive TIDs on this queue */
1160 for_each_set_bit(tid, &queue_tid_bitmap,
1161 IWL_MAX_TID_COUNT + 1) {
1162 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1163 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1164 continue;
1165
1166 inactive_tid_bitmap |= BIT(tid);
1167 }
1168
1169 /* If all TIDs are active - finish check on this queue */
1170 if (!inactive_tid_bitmap)
1171 continue;
1172
1173 /*
1174 * If we are here - the queue hadn't been served recently and is
1175 * in use
1176 */
1177
1178 sta_id = mvm->queue_info[i].ra_sta_id;
1179 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1180
1181 /*
1182 * If the STA doesn't exist anymore, it isn't an error. It could
1183 * be that it was removed since getting the queues, and in this
1184 * case it should've inactivated its queues anyway.
1185 */
1186 if (IS_ERR_OR_NULL(sta))
1187 continue;
1188
1189 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1190
1191 spin_lock_bh(&mvmsta->lock);
1192 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1193 inactive_tid_bitmap,
1194 &unshare_queues,
1195 &changetid_queues);
1196 if (ret && free_queue < 0) {
1197 queue_owner = sta;
1198 free_queue = i;
1199 }
1200 /* only unlock sta lock - we still need the queue info lock */
1201 spin_unlock_bh(&mvmsta->lock);
1202 }
1203
1204
1205 /* Reconfigure queues requiring reconfiguation */
1206 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1207 iwl_mvm_unshare_queue(mvm, i);
1208 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1209 iwl_mvm_change_queue_tid(mvm, i);
1210
1211 rcu_read_unlock();
1212
1213 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1214 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1215 alloc_for_sta);
1216 if (ret)
1217 return ret;
1218 }
1219
1220 return free_queue;
1221 }
1222
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1223 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1224 struct ieee80211_sta *sta, u8 ac, int tid)
1225 {
1226 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1227 struct iwl_trans_txq_scd_cfg cfg = {
1228 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1229 .sta_id = mvmsta->sta_id,
1230 .tid = tid,
1231 .frame_limit = IWL_FRAME_LIMIT,
1232 };
1233 unsigned int wdg_timeout =
1234 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1235 int queue = -1;
1236 u16 queue_tmp;
1237 unsigned long disable_agg_tids = 0;
1238 enum iwl_mvm_agg_state queue_state;
1239 bool shared_queue = false, inc_ssn;
1240 int ssn;
1241 unsigned long tfd_queue_mask;
1242 int ret;
1243
1244 lockdep_assert_held(&mvm->mutex);
1245
1246 if (iwl_mvm_has_new_tx_api(mvm))
1247 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1248
1249 spin_lock_bh(&mvmsta->lock);
1250 tfd_queue_mask = mvmsta->tfd_queue_msk;
1251 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1252 spin_unlock_bh(&mvmsta->lock);
1253
1254 if (tid == IWL_MAX_TID_COUNT) {
1255 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1256 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1257 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1258 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1259 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1260 queue);
1261
1262 /* If no such queue is found, we'll use a DATA queue instead */
1263 }
1264
1265 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1266 (mvm->queue_info[mvmsta->reserved_queue].status ==
1267 IWL_MVM_QUEUE_RESERVED)) {
1268 queue = mvmsta->reserved_queue;
1269 mvm->queue_info[queue].reserved = true;
1270 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1271 }
1272
1273 if (queue < 0)
1274 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1275 IWL_MVM_DQA_MIN_DATA_QUEUE,
1276 IWL_MVM_DQA_MAX_DATA_QUEUE);
1277 if (queue < 0) {
1278 /* try harder - perhaps kill an inactive queue */
1279 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1280 }
1281
1282 /* No free queue - we'll have to share */
1283 if (queue <= 0) {
1284 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1285 if (queue > 0) {
1286 shared_queue = true;
1287 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1288 }
1289 }
1290
1291 /*
1292 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1293 * to make sure no one else takes it.
1294 * This will allow avoiding re-acquiring the lock at the end of the
1295 * configuration. On error we'll mark it back as free.
1296 */
1297 if (queue > 0 && !shared_queue)
1298 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1299
1300 /* This shouldn't happen - out of queues */
1301 if (WARN_ON(queue <= 0)) {
1302 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1303 tid, cfg.sta_id);
1304 return queue;
1305 }
1306
1307 /*
1308 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1309 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1310 * as aggregatable.
1311 * Mark all DATA queues as allowing to be aggregated at some point
1312 */
1313 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1314 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1315
1316 IWL_DEBUG_TX_QUEUES(mvm,
1317 "Allocating %squeue #%d to sta %d on tid %d\n",
1318 shared_queue ? "shared " : "", queue,
1319 mvmsta->sta_id, tid);
1320
1321 if (shared_queue) {
1322 /* Disable any open aggs on this queue */
1323 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1324
1325 if (disable_agg_tids) {
1326 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1327 queue);
1328 iwl_mvm_invalidate_sta_queue(mvm, queue,
1329 disable_agg_tids, false);
1330 }
1331 }
1332
1333 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1334
1335 /*
1336 * Mark queue as shared in transport if shared
1337 * Note this has to be done after queue enablement because enablement
1338 * can also set this value, and there is no indication there to shared
1339 * queues
1340 */
1341 if (shared_queue)
1342 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1343
1344 spin_lock_bh(&mvmsta->lock);
1345 /*
1346 * This looks racy, but it is not. We have only one packet for
1347 * this ra/tid in our Tx path since we stop the Qdisc when we
1348 * need to allocate a new TFD queue.
1349 */
1350 if (inc_ssn) {
1351 mvmsta->tid_data[tid].seq_number += 0x10;
1352 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1353 }
1354 mvmsta->tid_data[tid].txq_id = queue;
1355 mvmsta->tfd_queue_msk |= BIT(queue);
1356 queue_state = mvmsta->tid_data[tid].state;
1357
1358 if (mvmsta->reserved_queue == queue)
1359 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1360 spin_unlock_bh(&mvmsta->lock);
1361
1362 if (!shared_queue) {
1363 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1364 if (ret)
1365 goto out_err;
1366
1367 /* If we need to re-enable aggregations... */
1368 if (queue_state == IWL_AGG_ON) {
1369 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1370 if (ret)
1371 goto out_err;
1372 }
1373 } else {
1374 /* Redirect queue, if needed */
1375 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1376 wdg_timeout, false,
1377 iwl_mvm_txq_from_tid(sta, tid));
1378 if (ret)
1379 goto out_err;
1380 }
1381
1382 return 0;
1383
1384 out_err:
1385 queue_tmp = queue;
1386 iwl_mvm_disable_txq(mvm, sta, &queue_tmp, tid, 0);
1387
1388 return ret;
1389 }
1390
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1391 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1392 {
1393 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1394 add_stream_wk);
1395
1396 mutex_lock(&mvm->mutex);
1397
1398 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1399
1400 while (!list_empty(&mvm->add_stream_txqs)) {
1401 struct iwl_mvm_txq *mvmtxq;
1402 struct ieee80211_txq *txq;
1403 u8 tid;
1404
1405 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1406 struct iwl_mvm_txq, list);
1407
1408 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1409 drv_priv);
1410 tid = txq->tid;
1411 if (tid == IEEE80211_NUM_TIDS)
1412 tid = IWL_MAX_TID_COUNT;
1413
1414 /*
1415 * We can't really do much here, but if this fails we can't
1416 * transmit anyway - so just don't transmit the frame etc.
1417 * and let them back up ... we've tried our best to allocate
1418 * a queue in the function itself.
1419 */
1420 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1421 list_del_init(&mvmtxq->list);
1422 continue;
1423 }
1424
1425 list_del_init(&mvmtxq->list);
1426 local_bh_disable();
1427 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1428 local_bh_enable();
1429 }
1430
1431 mutex_unlock(&mvm->mutex);
1432 }
1433
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1434 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1435 struct ieee80211_sta *sta,
1436 enum nl80211_iftype vif_type)
1437 {
1438 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1439 int queue;
1440
1441 /* queue reserving is disabled on new TX path */
1442 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1443 return 0;
1444
1445 /* run the general cleanup/unsharing of queues */
1446 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1447
1448 /* Make sure we have free resources for this STA */
1449 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1450 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1451 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1452 IWL_MVM_QUEUE_FREE))
1453 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1454 else
1455 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1456 IWL_MVM_DQA_MIN_DATA_QUEUE,
1457 IWL_MVM_DQA_MAX_DATA_QUEUE);
1458 if (queue < 0) {
1459 /* try again - this time kick out a queue if needed */
1460 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1461 if (queue < 0) {
1462 IWL_ERR(mvm, "No available queues for new station\n");
1463 return -ENOSPC;
1464 }
1465 }
1466 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1467
1468 mvmsta->reserved_queue = queue;
1469
1470 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1471 queue, mvmsta->sta_id);
1472
1473 return 0;
1474 }
1475
1476 /*
1477 * In DQA mode, after a HW restart the queues should be allocated as before, in
1478 * order to avoid race conditions when there are shared queues. This function
1479 * does the re-mapping and queue allocation.
1480 *
1481 * Note that re-enabling aggregations isn't done in this function.
1482 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1483 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1484 struct ieee80211_sta *sta)
1485 {
1486 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1487 unsigned int wdg =
1488 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1489 int i;
1490 struct iwl_trans_txq_scd_cfg cfg = {
1491 .sta_id = mvm_sta->sta_id,
1492 .frame_limit = IWL_FRAME_LIMIT,
1493 };
1494
1495 /* Make sure reserved queue is still marked as such (if allocated) */
1496 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1497 mvm->queue_info[mvm_sta->reserved_queue].status =
1498 IWL_MVM_QUEUE_RESERVED;
1499
1500 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1501 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1502 int txq_id = tid_data->txq_id;
1503 int ac;
1504
1505 if (txq_id == IWL_MVM_INVALID_QUEUE)
1506 continue;
1507
1508 ac = tid_to_mac80211_ac[i];
1509
1510 if (iwl_mvm_has_new_tx_api(mvm)) {
1511 IWL_DEBUG_TX_QUEUES(mvm,
1512 "Re-mapping sta %d tid %d\n",
1513 mvm_sta->sta_id, i);
1514 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
1515 i, wdg);
1516 /*
1517 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1518 * to try again later, we have no other good way of
1519 * failing here
1520 */
1521 if (txq_id < 0)
1522 txq_id = IWL_MVM_INVALID_QUEUE;
1523 tid_data->txq_id = txq_id;
1524
1525 /*
1526 * Since we don't set the seq number after reset, and HW
1527 * sets it now, FW reset will cause the seq num to start
1528 * at 0 again, so driver will need to update it
1529 * internally as well, so it keeps in sync with real val
1530 */
1531 tid_data->seq_number = 0;
1532 } else {
1533 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1534
1535 cfg.tid = i;
1536 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1537 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1538 txq_id ==
1539 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1540
1541 IWL_DEBUG_TX_QUEUES(mvm,
1542 "Re-mapping sta %d tid %d to queue %d\n",
1543 mvm_sta->sta_id, i, txq_id);
1544
1545 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1546 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1547 }
1548 }
1549 }
1550
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1551 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1552 struct iwl_mvm_int_sta *sta,
1553 const u8 *addr,
1554 u16 mac_id, u16 color)
1555 {
1556 struct iwl_mvm_add_sta_cmd cmd;
1557 int ret;
1558 u32 status = ADD_STA_SUCCESS;
1559
1560 lockdep_assert_held(&mvm->mutex);
1561
1562 memset(&cmd, 0, sizeof(cmd));
1563 cmd.sta_id = sta->sta_id;
1564
1565 if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, ADD_STA,
1566 0) >= 12 &&
1567 sta->type == IWL_STA_AUX_ACTIVITY)
1568 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1569 else
1570 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1571 color));
1572
1573 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1574 cmd.station_type = sta->type;
1575
1576 if (!iwl_mvm_has_new_tx_api(mvm))
1577 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1578 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1579
1580 if (addr)
1581 memcpy(cmd.addr, addr, ETH_ALEN);
1582
1583 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1584 iwl_mvm_add_sta_cmd_size(mvm),
1585 &cmd, &status);
1586 if (ret)
1587 return ret;
1588
1589 switch (status & IWL_ADD_STA_STATUS_MASK) {
1590 case ADD_STA_SUCCESS:
1591 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1592 return 0;
1593 default:
1594 ret = -EIO;
1595 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1596 status);
1597 break;
1598 }
1599 return ret;
1600 }
1601
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1602 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1603 struct ieee80211_vif *vif,
1604 struct ieee80211_sta *sta)
1605 {
1606 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1607 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1608 struct iwl_mvm_rxq_dup_data *dup_data;
1609 int i, ret, sta_id;
1610 bool sta_update = false;
1611 unsigned int sta_flags = 0;
1612
1613 lockdep_assert_held(&mvm->mutex);
1614
1615 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1616 sta_id = iwl_mvm_find_free_sta_id(mvm,
1617 ieee80211_vif_type_p2p(vif));
1618 else
1619 sta_id = mvm_sta->sta_id;
1620
1621 if (sta_id == IWL_MVM_INVALID_STA)
1622 return -ENOSPC;
1623
1624 spin_lock_init(&mvm_sta->lock);
1625
1626 /* if this is a HW restart re-alloc existing queues */
1627 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1628 struct iwl_mvm_int_sta tmp_sta = {
1629 .sta_id = sta_id,
1630 .type = mvm_sta->sta_type,
1631 };
1632
1633 /*
1634 * First add an empty station since allocating
1635 * a queue requires a valid station
1636 */
1637 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1638 mvmvif->id, mvmvif->color);
1639 if (ret)
1640 goto err;
1641
1642 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1643 sta_update = true;
1644 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1645 goto update_fw;
1646 }
1647
1648 mvm_sta->sta_id = sta_id;
1649 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1650 mvmvif->color);
1651 mvm_sta->vif = vif;
1652 if (!mvm->trans->trans_cfg->gen2)
1653 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1654 else
1655 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1656 mvm_sta->tx_protection = 0;
1657 mvm_sta->tt_tx_protection = false;
1658 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1659
1660 /* HW restart, don't assume the memory has been zeroed */
1661 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1662 mvm_sta->tfd_queue_msk = 0;
1663
1664 /* for HW restart - reset everything but the sequence number */
1665 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1666 u16 seq = mvm_sta->tid_data[i].seq_number;
1667 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1668 mvm_sta->tid_data[i].seq_number = seq;
1669
1670 /*
1671 * Mark all queues for this STA as unallocated and defer TX
1672 * frames until the queue is allocated
1673 */
1674 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1675 }
1676
1677 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1678 struct iwl_mvm_txq *mvmtxq =
1679 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1680
1681 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1682 INIT_LIST_HEAD(&mvmtxq->list);
1683 atomic_set(&mvmtxq->tx_request, 0);
1684 }
1685
1686 mvm_sta->agg_tids = 0;
1687
1688 if (iwl_mvm_has_new_rx_api(mvm) &&
1689 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1690 int q;
1691
1692 dup_data = kcalloc(mvm->trans->num_rx_queues,
1693 sizeof(*dup_data), GFP_KERNEL);
1694 if (!dup_data)
1695 return -ENOMEM;
1696 /*
1697 * Initialize all the last_seq values to 0xffff which can never
1698 * compare equal to the frame's seq_ctrl in the check in
1699 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1700 * number and fragmented packets don't reach that function.
1701 *
1702 * This thus allows receiving a packet with seqno 0 and the
1703 * retry bit set as the very first packet on a new TID.
1704 */
1705 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1706 memset(dup_data[q].last_seq, 0xff,
1707 sizeof(dup_data[q].last_seq));
1708 mvm_sta->dup_data = dup_data;
1709 }
1710
1711 if (!iwl_mvm_has_new_tx_api(mvm)) {
1712 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1713 ieee80211_vif_type_p2p(vif));
1714 if (ret)
1715 goto err;
1716 }
1717
1718 /*
1719 * if rs is registered with mac80211, then "add station" will be handled
1720 * via the corresponding ops, otherwise need to notify rate scaling here
1721 */
1722 if (iwl_mvm_has_tlc_offload(mvm))
1723 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1724 else
1725 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock);
1726
1727 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1728
1729 update_fw:
1730 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1731 if (ret)
1732 goto err;
1733
1734 if (vif->type == NL80211_IFTYPE_STATION) {
1735 if (!sta->tdls) {
1736 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1737 mvmvif->ap_sta_id = sta_id;
1738 } else {
1739 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1740 }
1741 }
1742
1743 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1744
1745 return 0;
1746
1747 err:
1748 return ret;
1749 }
1750
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1751 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1752 bool drain)
1753 {
1754 struct iwl_mvm_add_sta_cmd cmd = {};
1755 int ret;
1756 u32 status;
1757
1758 lockdep_assert_held(&mvm->mutex);
1759
1760 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1761 cmd.sta_id = mvmsta->sta_id;
1762 cmd.add_modify = STA_MODE_MODIFY;
1763 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1764 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1765
1766 status = ADD_STA_SUCCESS;
1767 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1768 iwl_mvm_add_sta_cmd_size(mvm),
1769 &cmd, &status);
1770 if (ret)
1771 return ret;
1772
1773 switch (status & IWL_ADD_STA_STATUS_MASK) {
1774 case ADD_STA_SUCCESS:
1775 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1776 mvmsta->sta_id);
1777 break;
1778 default:
1779 ret = -EIO;
1780 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1781 mvmsta->sta_id);
1782 break;
1783 }
1784
1785 return ret;
1786 }
1787
1788 /*
1789 * Remove a station from the FW table. Before sending the command to remove
1790 * the station validate that the station is indeed known to the driver (sanity
1791 * only).
1792 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1793 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1794 {
1795 struct ieee80211_sta *sta;
1796 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1797 .sta_id = sta_id,
1798 };
1799 int ret;
1800
1801 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1802 lockdep_is_held(&mvm->mutex));
1803
1804 /* Note: internal stations are marked as error values */
1805 if (!sta) {
1806 IWL_ERR(mvm, "Invalid station id\n");
1807 return -EINVAL;
1808 }
1809
1810 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1811 sizeof(rm_sta_cmd), &rm_sta_cmd);
1812 if (ret) {
1813 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1814 return ret;
1815 }
1816
1817 return 0;
1818 }
1819
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1820 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1821 struct ieee80211_vif *vif,
1822 struct ieee80211_sta *sta)
1823 {
1824 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1825 int i;
1826
1827 lockdep_assert_held(&mvm->mutex);
1828
1829 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1830 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1831 continue;
1832
1833 iwl_mvm_disable_txq(mvm, sta, &mvm_sta->tid_data[i].txq_id, i,
1834 0);
1835 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1836 }
1837
1838 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1839 struct iwl_mvm_txq *mvmtxq =
1840 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1841
1842 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1843 }
1844 }
1845
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1846 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1847 struct iwl_mvm_sta *mvm_sta)
1848 {
1849 int i;
1850
1851 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1852 u16 txq_id;
1853 int ret;
1854
1855 spin_lock_bh(&mvm_sta->lock);
1856 txq_id = mvm_sta->tid_data[i].txq_id;
1857 spin_unlock_bh(&mvm_sta->lock);
1858
1859 if (txq_id == IWL_MVM_INVALID_QUEUE)
1860 continue;
1861
1862 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1863 if (ret)
1864 return ret;
1865 }
1866
1867 return 0;
1868 }
1869
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1870 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1871 struct ieee80211_vif *vif,
1872 struct ieee80211_sta *sta)
1873 {
1874 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1875 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1876 u8 sta_id = mvm_sta->sta_id;
1877 int ret;
1878
1879 lockdep_assert_held(&mvm->mutex);
1880
1881 if (iwl_mvm_has_new_rx_api(mvm))
1882 kfree(mvm_sta->dup_data);
1883
1884 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1885 if (ret)
1886 return ret;
1887
1888 /* flush its queues here since we are freeing mvm_sta */
1889 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false);
1890 if (ret)
1891 return ret;
1892 if (iwl_mvm_has_new_tx_api(mvm)) {
1893 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1894 } else {
1895 u32 q_mask = mvm_sta->tfd_queue_msk;
1896
1897 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1898 q_mask);
1899 }
1900 if (ret)
1901 return ret;
1902
1903 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1904
1905 iwl_mvm_disable_sta_queues(mvm, vif, sta);
1906
1907 /* If there is a TXQ still marked as reserved - free it */
1908 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1909 u8 reserved_txq = mvm_sta->reserved_queue;
1910 enum iwl_mvm_queue_status *status;
1911
1912 /*
1913 * If no traffic has gone through the reserved TXQ - it
1914 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1915 * should be manually marked as free again
1916 */
1917 status = &mvm->queue_info[reserved_txq].status;
1918 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1919 (*status != IWL_MVM_QUEUE_FREE),
1920 "sta_id %d reserved txq %d status %d",
1921 sta_id, reserved_txq, *status))
1922 return -EINVAL;
1923
1924 *status = IWL_MVM_QUEUE_FREE;
1925 }
1926
1927 if (vif->type == NL80211_IFTYPE_STATION &&
1928 mvmvif->ap_sta_id == sta_id) {
1929 /* if associated - we can't remove the AP STA now */
1930 if (vif->bss_conf.assoc)
1931 return ret;
1932
1933 /* unassoc - go ahead - remove the AP STA now */
1934 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1935 }
1936
1937 /*
1938 * This shouldn't happen - the TDLS channel switch should be canceled
1939 * before the STA is removed.
1940 */
1941 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1942 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1943 cancel_delayed_work(&mvm->tdls_cs.dwork);
1944 }
1945
1946 /*
1947 * Make sure that the tx response code sees the station as -EBUSY and
1948 * calls the drain worker.
1949 */
1950 spin_lock_bh(&mvm_sta->lock);
1951 spin_unlock_bh(&mvm_sta->lock);
1952
1953 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1954 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1955
1956 return ret;
1957 }
1958
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)1959 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1960 struct ieee80211_vif *vif,
1961 u8 sta_id)
1962 {
1963 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1964
1965 lockdep_assert_held(&mvm->mutex);
1966
1967 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1968 return ret;
1969 }
1970
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,enum iwl_sta_type type)1971 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1972 struct iwl_mvm_int_sta *sta,
1973 u32 qmask, enum nl80211_iftype iftype,
1974 enum iwl_sta_type type)
1975 {
1976 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1977 sta->sta_id == IWL_MVM_INVALID_STA) {
1978 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1979 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1980 return -ENOSPC;
1981 }
1982
1983 sta->tfd_queue_msk = qmask;
1984 sta->type = type;
1985
1986 /* put a non-NULL value so iterating over the stations won't stop */
1987 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1988 return 0;
1989 }
1990
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)1991 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1992 {
1993 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1994 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1995 sta->sta_id = IWL_MVM_INVALID_STA;
1996 }
1997
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)1998 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
1999 u8 sta_id, u8 fifo)
2000 {
2001 unsigned int wdg_timeout =
2002 mvm->trans->trans_cfg->base_params->wd_timeout;
2003 struct iwl_trans_txq_scd_cfg cfg = {
2004 .fifo = fifo,
2005 .sta_id = sta_id,
2006 .tid = IWL_MAX_TID_COUNT,
2007 .aggregate = false,
2008 .frame_limit = IWL_FRAME_LIMIT,
2009 };
2010
2011 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2012
2013 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2014 }
2015
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2016 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2017 {
2018 unsigned int wdg_timeout =
2019 mvm->trans->trans_cfg->base_params->wd_timeout;
2020
2021 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2022
2023 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT,
2024 wdg_timeout);
2025 }
2026
iwl_mvm_add_int_sta_with_queue(struct iwl_mvm * mvm,int macidx,int maccolor,u8 * addr,struct iwl_mvm_int_sta * sta,u16 * queue,int fifo)2027 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2028 int maccolor, u8 *addr,
2029 struct iwl_mvm_int_sta *sta,
2030 u16 *queue, int fifo)
2031 {
2032 int ret;
2033
2034 /* Map queue to fifo - needs to happen before adding station */
2035 if (!iwl_mvm_has_new_tx_api(mvm))
2036 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2037
2038 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2039 if (ret) {
2040 if (!iwl_mvm_has_new_tx_api(mvm))
2041 iwl_mvm_disable_txq(mvm, NULL, queue,
2042 IWL_MAX_TID_COUNT, 0);
2043 return ret;
2044 }
2045
2046 /*
2047 * For 22000 firmware and on we cannot add queue to a station unknown
2048 * to firmware so enable queue here - after the station was added
2049 */
2050 if (iwl_mvm_has_new_tx_api(mvm)) {
2051 int txq;
2052
2053 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2054 if (txq < 0) {
2055 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2056 return txq;
2057 }
2058
2059 *queue = txq;
2060 }
2061
2062 return 0;
2063 }
2064
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2065 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2066 {
2067 int ret;
2068
2069 lockdep_assert_held(&mvm->mutex);
2070
2071 /* Allocate aux station and assign to it the aux queue */
2072 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2073 NL80211_IFTYPE_UNSPECIFIED,
2074 IWL_STA_AUX_ACTIVITY);
2075 if (ret)
2076 return ret;
2077
2078 /*
2079 * In CDB NICs we need to specify which lmac to use for aux activity
2080 * using the mac_id argument place to send lmac_id to the function
2081 */
2082 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2083 &mvm->aux_sta, &mvm->aux_queue,
2084 IWL_MVM_TX_FIFO_MCAST);
2085 if (ret) {
2086 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2087 return ret;
2088 }
2089
2090 return 0;
2091 }
2092
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2093 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2094 {
2095 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2096
2097 lockdep_assert_held(&mvm->mutex);
2098
2099 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2100 NULL, &mvm->snif_sta,
2101 &mvm->snif_queue,
2102 IWL_MVM_TX_FIFO_BE);
2103 }
2104
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2105 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2106 {
2107 int ret;
2108
2109 lockdep_assert_held(&mvm->mutex);
2110
2111 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2112 return -EINVAL;
2113
2114 iwl_mvm_disable_txq(mvm, NULL, &mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
2115 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2116 if (ret)
2117 IWL_WARN(mvm, "Failed sending remove station\n");
2118
2119 return ret;
2120 }
2121
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2122 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2123 {
2124 int ret;
2125
2126 lockdep_assert_held(&mvm->mutex);
2127
2128 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2129 return -EINVAL;
2130
2131 iwl_mvm_disable_txq(mvm, NULL, &mvm->aux_queue, IWL_MAX_TID_COUNT, 0);
2132 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2133 if (ret)
2134 IWL_WARN(mvm, "Failed sending remove station\n");
2135 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2136
2137 return ret;
2138 }
2139
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2140 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2141 {
2142 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2143 }
2144
2145 /*
2146 * Send the add station command for the vif's broadcast station.
2147 * Assumes that the station was already allocated.
2148 *
2149 * @mvm: the mvm component
2150 * @vif: the interface to which the broadcast station is added
2151 * @bsta: the broadcast station to add.
2152 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2153 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2154 {
2155 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2156 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2157 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2158 const u8 *baddr = _baddr;
2159 int queue;
2160 int ret;
2161 unsigned int wdg_timeout =
2162 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2163 struct iwl_trans_txq_scd_cfg cfg = {
2164 .fifo = IWL_MVM_TX_FIFO_VO,
2165 .sta_id = mvmvif->bcast_sta.sta_id,
2166 .tid = IWL_MAX_TID_COUNT,
2167 .aggregate = false,
2168 .frame_limit = IWL_FRAME_LIMIT,
2169 };
2170
2171 lockdep_assert_held(&mvm->mutex);
2172
2173 if (!iwl_mvm_has_new_tx_api(mvm)) {
2174 if (vif->type == NL80211_IFTYPE_AP ||
2175 vif->type == NL80211_IFTYPE_ADHOC) {
2176 queue = mvm->probe_queue;
2177 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2178 queue = mvm->p2p_dev_queue;
2179 } else {
2180 WARN(1, "Missing required TXQ for adding bcast STA\n");
2181 return -EINVAL;
2182 }
2183
2184 bsta->tfd_queue_msk |= BIT(queue);
2185
2186 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2187 }
2188
2189 if (vif->type == NL80211_IFTYPE_ADHOC)
2190 baddr = vif->bss_conf.bssid;
2191
2192 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2193 return -ENOSPC;
2194
2195 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2196 mvmvif->id, mvmvif->color);
2197 if (ret)
2198 return ret;
2199
2200 /*
2201 * For 22000 firmware and on we cannot add queue to a station unknown
2202 * to firmware so enable queue here - after the station was added
2203 */
2204 if (iwl_mvm_has_new_tx_api(mvm)) {
2205 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
2206 IWL_MAX_TID_COUNT,
2207 wdg_timeout);
2208 if (queue < 0) {
2209 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2210 return queue;
2211 }
2212
2213 if (vif->type == NL80211_IFTYPE_AP ||
2214 vif->type == NL80211_IFTYPE_ADHOC)
2215 mvm->probe_queue = queue;
2216 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2217 mvm->p2p_dev_queue = queue;
2218 }
2219
2220 return 0;
2221 }
2222
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2223 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2224 struct ieee80211_vif *vif)
2225 {
2226 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2227 u16 *queueptr, queue;
2228
2229 lockdep_assert_held(&mvm->mutex);
2230
2231 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true);
2232
2233 switch (vif->type) {
2234 case NL80211_IFTYPE_AP:
2235 case NL80211_IFTYPE_ADHOC:
2236 queueptr = &mvm->probe_queue;
2237 break;
2238 case NL80211_IFTYPE_P2P_DEVICE:
2239 queueptr = &mvm->p2p_dev_queue;
2240 break;
2241 default:
2242 WARN(1, "Can't free bcast queue on vif type %d\n",
2243 vif->type);
2244 return;
2245 }
2246
2247 queue = *queueptr;
2248 iwl_mvm_disable_txq(mvm, NULL, queueptr, IWL_MAX_TID_COUNT, 0);
2249 if (iwl_mvm_has_new_tx_api(mvm))
2250 return;
2251
2252 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2253 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2254 }
2255
2256 /* Send the FW a request to remove the station from it's internal data
2257 * structures, but DO NOT remove the entry from the local data structures. */
iwl_mvm_send_rm_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2258 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2259 {
2260 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2261 int ret;
2262
2263 lockdep_assert_held(&mvm->mutex);
2264
2265 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2266
2267 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2268 if (ret)
2269 IWL_WARN(mvm, "Failed sending remove station\n");
2270 return ret;
2271 }
2272
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2273 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2274 {
2275 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2276
2277 lockdep_assert_held(&mvm->mutex);
2278
2279 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2280 ieee80211_vif_type_p2p(vif),
2281 IWL_STA_GENERAL_PURPOSE);
2282 }
2283
2284 /* Allocate a new station entry for the broadcast station to the given vif,
2285 * and send it to the FW.
2286 * Note that each P2P mac should have its own broadcast station.
2287 *
2288 * @mvm: the mvm component
2289 * @vif: the interface to which the broadcast station is added
2290 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2291 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2292 {
2293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2294 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2295 int ret;
2296
2297 lockdep_assert_held(&mvm->mutex);
2298
2299 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2300 if (ret)
2301 return ret;
2302
2303 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2304
2305 if (ret)
2306 iwl_mvm_dealloc_int_sta(mvm, bsta);
2307
2308 return ret;
2309 }
2310
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2311 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2312 {
2313 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2314
2315 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2316 }
2317
2318 /*
2319 * Send the FW a request to remove the station from it's internal data
2320 * structures, and in addition remove it from the local data structure.
2321 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2322 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2323 {
2324 int ret;
2325
2326 lockdep_assert_held(&mvm->mutex);
2327
2328 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2329
2330 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2331
2332 return ret;
2333 }
2334
2335 /*
2336 * Allocate a new station entry for the multicast station to the given vif,
2337 * and send it to the FW.
2338 * Note that each AP/GO mac should have its own multicast station.
2339 *
2340 * @mvm: the mvm component
2341 * @vif: the interface to which the multicast station is added
2342 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2343 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2344 {
2345 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2346 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2347 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2348 const u8 *maddr = _maddr;
2349 struct iwl_trans_txq_scd_cfg cfg = {
2350 .fifo = vif->type == NL80211_IFTYPE_AP ?
2351 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2352 .sta_id = msta->sta_id,
2353 .tid = 0,
2354 .aggregate = false,
2355 .frame_limit = IWL_FRAME_LIMIT,
2356 };
2357 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2358 int ret;
2359
2360 lockdep_assert_held(&mvm->mutex);
2361
2362 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2363 vif->type != NL80211_IFTYPE_ADHOC))
2364 return -ENOTSUPP;
2365
2366 /*
2367 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2368 * invalid, so make sure we use the queue we want.
2369 * Note that this is done here as we want to avoid making DQA
2370 * changes in mac80211 layer.
2371 */
2372 if (vif->type == NL80211_IFTYPE_ADHOC)
2373 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2374
2375 /*
2376 * While in previous FWs we had to exclude cab queue from TFD queue
2377 * mask, now it is needed as any other queue.
2378 */
2379 if (!iwl_mvm_has_new_tx_api(mvm) &&
2380 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2381 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2382 timeout);
2383 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
2384 }
2385 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2386 mvmvif->id, mvmvif->color);
2387 if (ret)
2388 goto err;
2389
2390 /*
2391 * Enable cab queue after the ADD_STA command is sent.
2392 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2393 * command with unknown station id, and for FW that doesn't support
2394 * station API since the cab queue is not included in the
2395 * tfd_queue_mask.
2396 */
2397 if (iwl_mvm_has_new_tx_api(mvm)) {
2398 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
2399 0,
2400 timeout);
2401 if (queue < 0) {
2402 ret = queue;
2403 goto err;
2404 }
2405 mvmvif->cab_queue = queue;
2406 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2407 IWL_UCODE_TLV_API_STA_TYPE))
2408 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2409 timeout);
2410
2411 return 0;
2412 err:
2413 iwl_mvm_dealloc_int_sta(mvm, msta);
2414 return ret;
2415 }
2416
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2417 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2418 struct ieee80211_key_conf *keyconf,
2419 bool mcast)
2420 {
2421 union {
2422 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2423 struct iwl_mvm_add_sta_key_cmd cmd;
2424 } u = {};
2425 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2426 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2427 __le16 key_flags;
2428 int ret, size;
2429 u32 status;
2430
2431 /* This is a valid situation for GTK removal */
2432 if (sta_id == IWL_MVM_INVALID_STA)
2433 return 0;
2434
2435 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2436 STA_KEY_FLG_KEYID_MSK);
2437 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2438 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2439
2440 if (mcast)
2441 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2442
2443 /*
2444 * The fields assigned here are in the same location at the start
2445 * of the command, so we can do this union trick.
2446 */
2447 u.cmd.common.key_flags = key_flags;
2448 u.cmd.common.key_offset = keyconf->hw_key_idx;
2449 u.cmd.common.sta_id = sta_id;
2450
2451 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2452
2453 status = ADD_STA_SUCCESS;
2454 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2455 &status);
2456
2457 switch (status) {
2458 case ADD_STA_SUCCESS:
2459 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2460 break;
2461 default:
2462 ret = -EIO;
2463 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2464 break;
2465 }
2466
2467 return ret;
2468 }
2469
2470 /*
2471 * Send the FW a request to remove the station from it's internal data
2472 * structures, and in addition remove it from the local data structure.
2473 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2474 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2475 {
2476 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2477 int ret;
2478
2479 lockdep_assert_held(&mvm->mutex);
2480
2481 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true);
2482
2483 iwl_mvm_disable_txq(mvm, NULL, &mvmvif->cab_queue, 0, 0);
2484
2485 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2486 if (ret)
2487 IWL_WARN(mvm, "Failed sending remove station\n");
2488
2489 return ret;
2490 }
2491
2492 #define IWL_MAX_RX_BA_SESSIONS 16
2493
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2494 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2495 {
2496 struct iwl_mvm_rss_sync_notif notif = {
2497 .metadata.type = IWL_MVM_RXQ_NOTIF_DEL_BA,
2498 .metadata.sync = 1,
2499 .delba.baid = baid,
2500 };
2501 iwl_mvm_sync_rx_queues_internal(mvm, (void *)¬if, sizeof(notif));
2502 };
2503
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2504 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2505 struct iwl_mvm_baid_data *data)
2506 {
2507 int i;
2508
2509 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2510
2511 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2512 int j;
2513 struct iwl_mvm_reorder_buffer *reorder_buf =
2514 &data->reorder_buf[i];
2515 struct iwl_mvm_reorder_buf_entry *entries =
2516 &data->entries[i * data->entries_per_queue];
2517
2518 spin_lock_bh(&reorder_buf->lock);
2519 if (likely(!reorder_buf->num_stored)) {
2520 spin_unlock_bh(&reorder_buf->lock);
2521 continue;
2522 }
2523
2524 /*
2525 * This shouldn't happen in regular DELBA since the internal
2526 * delBA notification should trigger a release of all frames in
2527 * the reorder buffer.
2528 */
2529 WARN_ON(1);
2530
2531 for (j = 0; j < reorder_buf->buf_size; j++)
2532 __skb_queue_purge(&entries[j].e.frames);
2533 /*
2534 * Prevent timer re-arm. This prevents a very far fetched case
2535 * where we timed out on the notification. There may be prior
2536 * RX frames pending in the RX queue before the notification
2537 * that might get processed between now and the actual deletion
2538 * and we would re-arm the timer although we are deleting the
2539 * reorder buffer.
2540 */
2541 reorder_buf->removed = true;
2542 spin_unlock_bh(&reorder_buf->lock);
2543 del_timer_sync(&reorder_buf->reorder_timer);
2544 }
2545 }
2546
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2547 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2548 struct iwl_mvm_baid_data *data,
2549 u16 ssn, u16 buf_size)
2550 {
2551 int i;
2552
2553 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2554 struct iwl_mvm_reorder_buffer *reorder_buf =
2555 &data->reorder_buf[i];
2556 struct iwl_mvm_reorder_buf_entry *entries =
2557 &data->entries[i * data->entries_per_queue];
2558 int j;
2559
2560 reorder_buf->num_stored = 0;
2561 reorder_buf->head_sn = ssn;
2562 reorder_buf->buf_size = buf_size;
2563 /* rx reorder timer */
2564 timer_setup(&reorder_buf->reorder_timer,
2565 iwl_mvm_reorder_timer_expired, 0);
2566 spin_lock_init(&reorder_buf->lock);
2567 reorder_buf->mvm = mvm;
2568 reorder_buf->queue = i;
2569 reorder_buf->valid = false;
2570 for (j = 0; j < reorder_buf->buf_size; j++)
2571 __skb_queue_head_init(&entries[j].e.frames);
2572 }
2573 }
2574
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2575 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2576 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2577 {
2578 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2579 struct iwl_mvm_add_sta_cmd cmd = {};
2580 struct iwl_mvm_baid_data *baid_data = NULL;
2581 int ret;
2582 u32 status;
2583
2584 lockdep_assert_held(&mvm->mutex);
2585
2586 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2587 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2588 return -ENOSPC;
2589 }
2590
2591 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2592 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2593
2594 /* sparse doesn't like the __align() so don't check */
2595 #ifndef __CHECKER__
2596 /*
2597 * The division below will be OK if either the cache line size
2598 * can be divided by the entry size (ALIGN will round up) or if
2599 * if the entry size can be divided by the cache line size, in
2600 * which case the ALIGN() will do nothing.
2601 */
2602 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2603 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2604 #endif
2605
2606 /*
2607 * Upward align the reorder buffer size to fill an entire cache
2608 * line for each queue, to avoid sharing cache lines between
2609 * different queues.
2610 */
2611 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2612
2613 /*
2614 * Allocate here so if allocation fails we can bail out early
2615 * before starting the BA session in the firmware
2616 */
2617 baid_data = kzalloc(sizeof(*baid_data) +
2618 mvm->trans->num_rx_queues *
2619 reorder_buf_size,
2620 GFP_KERNEL);
2621 if (!baid_data)
2622 return -ENOMEM;
2623
2624 /*
2625 * This division is why we need the above BUILD_BUG_ON(),
2626 * if that doesn't hold then this will not be right.
2627 */
2628 baid_data->entries_per_queue =
2629 reorder_buf_size / sizeof(baid_data->entries[0]);
2630 }
2631
2632 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2633 cmd.sta_id = mvm_sta->sta_id;
2634 cmd.add_modify = STA_MODE_MODIFY;
2635 if (start) {
2636 cmd.add_immediate_ba_tid = (u8) tid;
2637 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2638 cmd.rx_ba_window = cpu_to_le16(buf_size);
2639 } else {
2640 cmd.remove_immediate_ba_tid = (u8) tid;
2641 }
2642 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2643 STA_MODIFY_REMOVE_BA_TID;
2644
2645 status = ADD_STA_SUCCESS;
2646 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2647 iwl_mvm_add_sta_cmd_size(mvm),
2648 &cmd, &status);
2649 if (ret)
2650 goto out_free;
2651
2652 switch (status & IWL_ADD_STA_STATUS_MASK) {
2653 case ADD_STA_SUCCESS:
2654 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2655 start ? "start" : "stopp");
2656 break;
2657 case ADD_STA_IMMEDIATE_BA_FAILURE:
2658 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2659 ret = -ENOSPC;
2660 break;
2661 default:
2662 ret = -EIO;
2663 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2664 start ? "start" : "stopp", status);
2665 break;
2666 }
2667
2668 if (ret)
2669 goto out_free;
2670
2671 if (start) {
2672 u8 baid;
2673
2674 mvm->rx_ba_sessions++;
2675
2676 if (!iwl_mvm_has_new_rx_api(mvm))
2677 return 0;
2678
2679 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2680 ret = -EINVAL;
2681 goto out_free;
2682 }
2683 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2684 IWL_ADD_STA_BAID_SHIFT);
2685 baid_data->baid = baid;
2686 baid_data->timeout = timeout;
2687 baid_data->last_rx = jiffies;
2688 baid_data->rcu_ptr = &mvm->baid_map[baid];
2689 timer_setup(&baid_data->session_timer,
2690 iwl_mvm_rx_agg_session_expired, 0);
2691 baid_data->mvm = mvm;
2692 baid_data->tid = tid;
2693 baid_data->sta_id = mvm_sta->sta_id;
2694
2695 mvm_sta->tid_to_baid[tid] = baid;
2696 if (timeout)
2697 mod_timer(&baid_data->session_timer,
2698 TU_TO_EXP_TIME(timeout * 2));
2699
2700 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2701 /*
2702 * protect the BA data with RCU to cover a case where our
2703 * internal RX sync mechanism will timeout (not that it's
2704 * supposed to happen) and we will free the session data while
2705 * RX is being processed in parallel
2706 */
2707 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2708 mvm_sta->sta_id, tid, baid);
2709 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2710 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2711 } else {
2712 u8 baid = mvm_sta->tid_to_baid[tid];
2713
2714 if (mvm->rx_ba_sessions > 0)
2715 /* check that restart flow didn't zero the counter */
2716 mvm->rx_ba_sessions--;
2717 if (!iwl_mvm_has_new_rx_api(mvm))
2718 return 0;
2719
2720 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2721 return -EINVAL;
2722
2723 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2724 if (WARN_ON(!baid_data))
2725 return -EINVAL;
2726
2727 /* synchronize all rx queues so we can safely delete */
2728 iwl_mvm_free_reorder(mvm, baid_data);
2729 del_timer_sync(&baid_data->session_timer);
2730 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2731 kfree_rcu(baid_data, rcu_head);
2732 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2733 }
2734 return 0;
2735
2736 out_free:
2737 kfree(baid_data);
2738 return ret;
2739 }
2740
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)2741 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2742 int tid, u8 queue, bool start)
2743 {
2744 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2745 struct iwl_mvm_add_sta_cmd cmd = {};
2746 int ret;
2747 u32 status;
2748
2749 lockdep_assert_held(&mvm->mutex);
2750
2751 if (start) {
2752 mvm_sta->tfd_queue_msk |= BIT(queue);
2753 mvm_sta->tid_disable_agg &= ~BIT(tid);
2754 } else {
2755 /* In DQA-mode the queue isn't removed on agg termination */
2756 mvm_sta->tid_disable_agg |= BIT(tid);
2757 }
2758
2759 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2760 cmd.sta_id = mvm_sta->sta_id;
2761 cmd.add_modify = STA_MODE_MODIFY;
2762 if (!iwl_mvm_has_new_tx_api(mvm))
2763 cmd.modify_mask = STA_MODIFY_QUEUES;
2764 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2765 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2766 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2767
2768 status = ADD_STA_SUCCESS;
2769 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2770 iwl_mvm_add_sta_cmd_size(mvm),
2771 &cmd, &status);
2772 if (ret)
2773 return ret;
2774
2775 switch (status & IWL_ADD_STA_STATUS_MASK) {
2776 case ADD_STA_SUCCESS:
2777 break;
2778 default:
2779 ret = -EIO;
2780 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2781 start ? "start" : "stopp", status);
2782 break;
2783 }
2784
2785 return ret;
2786 }
2787
2788 const u8 tid_to_mac80211_ac[] = {
2789 IEEE80211_AC_BE,
2790 IEEE80211_AC_BK,
2791 IEEE80211_AC_BK,
2792 IEEE80211_AC_BE,
2793 IEEE80211_AC_VI,
2794 IEEE80211_AC_VI,
2795 IEEE80211_AC_VO,
2796 IEEE80211_AC_VO,
2797 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2798 };
2799
2800 static const u8 tid_to_ucode_ac[] = {
2801 AC_BE,
2802 AC_BK,
2803 AC_BK,
2804 AC_BE,
2805 AC_VI,
2806 AC_VI,
2807 AC_VO,
2808 AC_VO,
2809 };
2810
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)2811 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2812 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2813 {
2814 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2815 struct iwl_mvm_tid_data *tid_data;
2816 u16 normalized_ssn;
2817 u16 txq_id;
2818 int ret;
2819
2820 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2821 return -EINVAL;
2822
2823 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2824 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2825 IWL_ERR(mvm,
2826 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2827 mvmsta->tid_data[tid].state);
2828 return -ENXIO;
2829 }
2830
2831 lockdep_assert_held(&mvm->mutex);
2832
2833 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2834 iwl_mvm_has_new_tx_api(mvm)) {
2835 u8 ac = tid_to_mac80211_ac[tid];
2836
2837 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2838 if (ret)
2839 return ret;
2840 }
2841
2842 spin_lock_bh(&mvmsta->lock);
2843
2844 /*
2845 * Note the possible cases:
2846 * 1. An enabled TXQ - TXQ needs to become agg'ed
2847 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2848 * it as reserved
2849 */
2850 txq_id = mvmsta->tid_data[tid].txq_id;
2851 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2852 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2853 IWL_MVM_DQA_MIN_DATA_QUEUE,
2854 IWL_MVM_DQA_MAX_DATA_QUEUE);
2855 if (ret < 0) {
2856 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2857 goto out;
2858 }
2859
2860 txq_id = ret;
2861
2862 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2863 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2864 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2865 ret = -ENXIO;
2866 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2867 tid, IWL_MAX_HW_QUEUES - 1);
2868 goto out;
2869
2870 } else if (unlikely(mvm->queue_info[txq_id].status ==
2871 IWL_MVM_QUEUE_SHARED)) {
2872 ret = -ENXIO;
2873 IWL_DEBUG_TX_QUEUES(mvm,
2874 "Can't start tid %d agg on shared queue!\n",
2875 tid);
2876 goto out;
2877 }
2878
2879 IWL_DEBUG_TX_QUEUES(mvm,
2880 "AGG for tid %d will be on queue #%d\n",
2881 tid, txq_id);
2882
2883 tid_data = &mvmsta->tid_data[tid];
2884 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2885 tid_data->txq_id = txq_id;
2886 *ssn = tid_data->ssn;
2887
2888 IWL_DEBUG_TX_QUEUES(mvm,
2889 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2890 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2891 tid_data->next_reclaimed);
2892
2893 /*
2894 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2895 * to align the wrap around of ssn so we compare relevant values.
2896 */
2897 normalized_ssn = tid_data->ssn;
2898 if (mvm->trans->trans_cfg->gen2)
2899 normalized_ssn &= 0xff;
2900
2901 if (normalized_ssn == tid_data->next_reclaimed) {
2902 tid_data->state = IWL_AGG_STARTING;
2903 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2904 } else {
2905 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2906 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
2907 }
2908
2909 out:
2910 spin_unlock_bh(&mvmsta->lock);
2911
2912 return ret;
2913 }
2914
iwl_mvm_sta_tx_agg_oper(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 buf_size,bool amsdu)2915 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2916 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2917 bool amsdu)
2918 {
2919 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2920 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2921 unsigned int wdg_timeout =
2922 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2923 int queue, ret;
2924 bool alloc_queue = true;
2925 enum iwl_mvm_queue_status queue_status;
2926 u16 ssn;
2927
2928 struct iwl_trans_txq_scd_cfg cfg = {
2929 .sta_id = mvmsta->sta_id,
2930 .tid = tid,
2931 .frame_limit = buf_size,
2932 .aggregate = true,
2933 };
2934
2935 /*
2936 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2937 * manager, so this function should never be called in this case.
2938 */
2939 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2940 return -EINVAL;
2941
2942 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2943 != IWL_MAX_TID_COUNT);
2944
2945 spin_lock_bh(&mvmsta->lock);
2946 ssn = tid_data->ssn;
2947 queue = tid_data->txq_id;
2948 tid_data->state = IWL_AGG_ON;
2949 mvmsta->agg_tids |= BIT(tid);
2950 tid_data->ssn = 0xffff;
2951 tid_data->amsdu_in_ampdu_allowed = amsdu;
2952 spin_unlock_bh(&mvmsta->lock);
2953
2954 if (iwl_mvm_has_new_tx_api(mvm)) {
2955 /*
2956 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2957 * would have failed, so if we are here there is no need to
2958 * allocate a queue.
2959 * However, if aggregation size is different than the default
2960 * size, the scheduler should be reconfigured.
2961 * We cannot do this with the new TX API, so return unsupported
2962 * for now, until it will be offloaded to firmware..
2963 * Note that if SCD default value changes - this condition
2964 * should be updated as well.
2965 */
2966 if (buf_size < IWL_FRAME_LIMIT)
2967 return -ENOTSUPP;
2968
2969 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2970 if (ret)
2971 return -EIO;
2972 goto out;
2973 }
2974
2975 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2976
2977 queue_status = mvm->queue_info[queue].status;
2978
2979 /* Maybe there is no need to even alloc a queue... */
2980 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2981 alloc_queue = false;
2982
2983 /*
2984 * Only reconfig the SCD for the queue if the window size has
2985 * changed from current (become smaller)
2986 */
2987 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2988 /*
2989 * If reconfiguring an existing queue, it first must be
2990 * drained
2991 */
2992 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2993 BIT(queue));
2994 if (ret) {
2995 IWL_ERR(mvm,
2996 "Error draining queue before reconfig\n");
2997 return ret;
2998 }
2999
3000 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3001 mvmsta->sta_id, tid,
3002 buf_size, ssn);
3003 if (ret) {
3004 IWL_ERR(mvm,
3005 "Error reconfiguring TXQ #%d\n", queue);
3006 return ret;
3007 }
3008 }
3009
3010 if (alloc_queue)
3011 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3012 &cfg, wdg_timeout);
3013
3014 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3015 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3016 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3017 if (ret)
3018 return -EIO;
3019 }
3020
3021 /* No need to mark as reserved */
3022 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3023
3024 out:
3025 /*
3026 * Even though in theory the peer could have different
3027 * aggregation reorder buffer sizes for different sessions,
3028 * our ucode doesn't allow for that and has a global limit
3029 * for each station. Therefore, use the minimum of all the
3030 * aggregation sessions and our default value.
3031 */
3032 mvmsta->max_agg_bufsize =
3033 min(mvmsta->max_agg_bufsize, buf_size);
3034 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
3035
3036 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3037 sta->addr, tid);
3038
3039 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq);
3040 }
3041
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3042 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3043 struct iwl_mvm_sta *mvmsta,
3044 struct iwl_mvm_tid_data *tid_data)
3045 {
3046 u16 txq_id = tid_data->txq_id;
3047
3048 lockdep_assert_held(&mvm->mutex);
3049
3050 if (iwl_mvm_has_new_tx_api(mvm))
3051 return;
3052
3053 /*
3054 * The TXQ is marked as reserved only if no traffic came through yet
3055 * This means no traffic has been sent on this TID (agg'd or not), so
3056 * we no longer have use for the queue. Since it hasn't even been
3057 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3058 * free.
3059 */
3060 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3061 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3062 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3063 }
3064 }
3065
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3066 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3067 struct ieee80211_sta *sta, u16 tid)
3068 {
3069 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3070 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3071 u16 txq_id;
3072 int err;
3073
3074 /*
3075 * If mac80211 is cleaning its state, then say that we finished since
3076 * our state has been cleared anyway.
3077 */
3078 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3079 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3080 return 0;
3081 }
3082
3083 spin_lock_bh(&mvmsta->lock);
3084
3085 txq_id = tid_data->txq_id;
3086
3087 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3088 mvmsta->sta_id, tid, txq_id, tid_data->state);
3089
3090 mvmsta->agg_tids &= ~BIT(tid);
3091
3092 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3093
3094 switch (tid_data->state) {
3095 case IWL_AGG_ON:
3096 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3097
3098 IWL_DEBUG_TX_QUEUES(mvm,
3099 "ssn = %d, next_recl = %d\n",
3100 tid_data->ssn, tid_data->next_reclaimed);
3101
3102 tid_data->ssn = 0xffff;
3103 tid_data->state = IWL_AGG_OFF;
3104 spin_unlock_bh(&mvmsta->lock);
3105
3106 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3107
3108 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3109 return 0;
3110 case IWL_AGG_STARTING:
3111 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3112 /*
3113 * The agg session has been stopped before it was set up. This
3114 * can happen when the AddBA timer times out for example.
3115 */
3116
3117 /* No barriers since we are under mutex */
3118 lockdep_assert_held(&mvm->mutex);
3119
3120 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3121 tid_data->state = IWL_AGG_OFF;
3122 err = 0;
3123 break;
3124 default:
3125 IWL_ERR(mvm,
3126 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3127 mvmsta->sta_id, tid, tid_data->state);
3128 IWL_ERR(mvm,
3129 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3130 err = -EINVAL;
3131 }
3132
3133 spin_unlock_bh(&mvmsta->lock);
3134
3135 return err;
3136 }
3137
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3138 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3139 struct ieee80211_sta *sta, u16 tid)
3140 {
3141 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3142 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3143 u16 txq_id;
3144 enum iwl_mvm_agg_state old_state;
3145
3146 /*
3147 * First set the agg state to OFF to avoid calling
3148 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3149 */
3150 spin_lock_bh(&mvmsta->lock);
3151 txq_id = tid_data->txq_id;
3152 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3153 mvmsta->sta_id, tid, txq_id, tid_data->state);
3154 old_state = tid_data->state;
3155 tid_data->state = IWL_AGG_OFF;
3156 mvmsta->agg_tids &= ~BIT(tid);
3157 spin_unlock_bh(&mvmsta->lock);
3158
3159 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3160
3161 if (old_state >= IWL_AGG_ON) {
3162 iwl_mvm_drain_sta(mvm, mvmsta, true);
3163
3164 if (iwl_mvm_has_new_tx_api(mvm)) {
3165 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3166 BIT(tid), 0))
3167 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3168 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3169 } else {
3170 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), 0))
3171 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3172 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3173 }
3174
3175 iwl_mvm_drain_sta(mvm, mvmsta, false);
3176
3177 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3178 }
3179
3180 return 0;
3181 }
3182
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3183 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3184 {
3185 int i, max = -1, max_offs = -1;
3186
3187 lockdep_assert_held(&mvm->mutex);
3188
3189 /* Pick the unused key offset with the highest 'deleted'
3190 * counter. Every time a key is deleted, all the counters
3191 * are incremented and the one that was just deleted is
3192 * reset to zero. Thus, the highest counter is the one
3193 * that was deleted longest ago. Pick that one.
3194 */
3195 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3196 if (test_bit(i, mvm->fw_key_table))
3197 continue;
3198 if (mvm->fw_key_deleted[i] > max) {
3199 max = mvm->fw_key_deleted[i];
3200 max_offs = i;
3201 }
3202 }
3203
3204 if (max_offs < 0)
3205 return STA_KEY_IDX_INVALID;
3206
3207 return max_offs;
3208 }
3209
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3210 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3211 struct ieee80211_vif *vif,
3212 struct ieee80211_sta *sta)
3213 {
3214 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3215
3216 if (sta)
3217 return iwl_mvm_sta_from_mac80211(sta);
3218
3219 /*
3220 * The device expects GTKs for station interfaces to be
3221 * installed as GTKs for the AP station. If we have no
3222 * station ID, then use AP's station ID.
3223 */
3224 if (vif->type == NL80211_IFTYPE_STATION &&
3225 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3226 u8 sta_id = mvmvif->ap_sta_id;
3227
3228 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3229 lockdep_is_held(&mvm->mutex));
3230
3231 /*
3232 * It is possible that the 'sta' parameter is NULL,
3233 * for example when a GTK is removed - the sta_id will then
3234 * be the AP ID, and no station was passed by mac80211.
3235 */
3236 if (IS_ERR_OR_NULL(sta))
3237 return NULL;
3238
3239 return iwl_mvm_sta_from_mac80211(sta);
3240 }
3241
3242 return NULL;
3243 }
3244
iwl_mvm_send_sta_key(struct iwl_mvm * mvm,u32 sta_id,struct ieee80211_key_conf * key,bool mcast,u32 tkip_iv32,u16 * tkip_p1k,u32 cmd_flags,u8 key_offset,bool mfp)3245 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3246 u32 sta_id,
3247 struct ieee80211_key_conf *key, bool mcast,
3248 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3249 u8 key_offset, bool mfp)
3250 {
3251 union {
3252 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3253 struct iwl_mvm_add_sta_key_cmd cmd;
3254 } u = {};
3255 __le16 key_flags;
3256 int ret;
3257 u32 status;
3258 u16 keyidx;
3259 u64 pn = 0;
3260 int i, size;
3261 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3262 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3263
3264 if (sta_id == IWL_MVM_INVALID_STA)
3265 return -EINVAL;
3266
3267 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3268 STA_KEY_FLG_KEYID_MSK;
3269 key_flags = cpu_to_le16(keyidx);
3270 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3271
3272 switch (key->cipher) {
3273 case WLAN_CIPHER_SUITE_TKIP:
3274 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3275 if (new_api) {
3276 memcpy((void *)&u.cmd.tx_mic_key,
3277 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3278 IWL_MIC_KEY_SIZE);
3279
3280 memcpy((void *)&u.cmd.rx_mic_key,
3281 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3282 IWL_MIC_KEY_SIZE);
3283 pn = atomic64_read(&key->tx_pn);
3284
3285 } else {
3286 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3287 for (i = 0; i < 5; i++)
3288 u.cmd_v1.tkip_rx_ttak[i] =
3289 cpu_to_le16(tkip_p1k[i]);
3290 }
3291 memcpy(u.cmd.common.key, key->key, key->keylen);
3292 break;
3293 case WLAN_CIPHER_SUITE_CCMP:
3294 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3295 memcpy(u.cmd.common.key, key->key, key->keylen);
3296 if (new_api)
3297 pn = atomic64_read(&key->tx_pn);
3298 break;
3299 case WLAN_CIPHER_SUITE_WEP104:
3300 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3301 /* fall through */
3302 case WLAN_CIPHER_SUITE_WEP40:
3303 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3304 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3305 break;
3306 case WLAN_CIPHER_SUITE_GCMP_256:
3307 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3308 /* fall through */
3309 case WLAN_CIPHER_SUITE_GCMP:
3310 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3311 memcpy(u.cmd.common.key, key->key, key->keylen);
3312 if (new_api)
3313 pn = atomic64_read(&key->tx_pn);
3314 break;
3315 default:
3316 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3317 memcpy(u.cmd.common.key, key->key, key->keylen);
3318 }
3319
3320 if (mcast)
3321 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3322 if (mfp)
3323 key_flags |= cpu_to_le16(STA_KEY_MFP);
3324
3325 u.cmd.common.key_offset = key_offset;
3326 u.cmd.common.key_flags = key_flags;
3327 u.cmd.common.sta_id = sta_id;
3328
3329 if (new_api) {
3330 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3331 size = sizeof(u.cmd);
3332 } else {
3333 size = sizeof(u.cmd_v1);
3334 }
3335
3336 status = ADD_STA_SUCCESS;
3337 if (cmd_flags & CMD_ASYNC)
3338 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3339 &u.cmd);
3340 else
3341 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3342 &u.cmd, &status);
3343
3344 switch (status) {
3345 case ADD_STA_SUCCESS:
3346 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3347 break;
3348 default:
3349 ret = -EIO;
3350 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3351 break;
3352 }
3353
3354 return ret;
3355 }
3356
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3357 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3358 struct ieee80211_key_conf *keyconf,
3359 u8 sta_id, bool remove_key)
3360 {
3361 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3362
3363 /* verify the key details match the required command's expectations */
3364 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3365 (keyconf->keyidx != 4 && keyconf->keyidx != 5) ||
3366 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3367 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3368 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3369 return -EINVAL;
3370
3371 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3372 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3373 return -EINVAL;
3374
3375 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3376 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3377
3378 if (remove_key) {
3379 /* This is a valid situation for IGTK */
3380 if (sta_id == IWL_MVM_INVALID_STA)
3381 return 0;
3382
3383 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3384 } else {
3385 struct ieee80211_key_seq seq;
3386 const u8 *pn;
3387
3388 switch (keyconf->cipher) {
3389 case WLAN_CIPHER_SUITE_AES_CMAC:
3390 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3391 break;
3392 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3393 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3394 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3395 break;
3396 default:
3397 return -EINVAL;
3398 }
3399
3400 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3401 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3402 igtk_cmd.ctrl_flags |=
3403 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3404 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3405 pn = seq.aes_cmac.pn;
3406 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3407 ((u64) pn[4] << 8) |
3408 ((u64) pn[3] << 16) |
3409 ((u64) pn[2] << 24) |
3410 ((u64) pn[1] << 32) |
3411 ((u64) pn[0] << 40));
3412 }
3413
3414 IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n",
3415 remove_key ? "removing" : "installing",
3416 igtk_cmd.sta_id);
3417
3418 if (!iwl_mvm_has_new_rx_api(mvm)) {
3419 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3420 .ctrl_flags = igtk_cmd.ctrl_flags,
3421 .key_id = igtk_cmd.key_id,
3422 .sta_id = igtk_cmd.sta_id,
3423 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3424 };
3425
3426 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3427 ARRAY_SIZE(igtk_cmd_v1.igtk));
3428 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3429 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3430 }
3431 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3432 sizeof(igtk_cmd), &igtk_cmd);
3433 }
3434
3435
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3436 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3437 struct ieee80211_vif *vif,
3438 struct ieee80211_sta *sta)
3439 {
3440 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3441
3442 if (sta)
3443 return sta->addr;
3444
3445 if (vif->type == NL80211_IFTYPE_STATION &&
3446 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3447 u8 sta_id = mvmvif->ap_sta_id;
3448 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3449 lockdep_is_held(&mvm->mutex));
3450 return sta->addr;
3451 }
3452
3453
3454 return NULL;
3455 }
3456
__iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset,bool mcast)3457 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3458 struct ieee80211_vif *vif,
3459 struct ieee80211_sta *sta,
3460 struct ieee80211_key_conf *keyconf,
3461 u8 key_offset,
3462 bool mcast)
3463 {
3464 int ret;
3465 const u8 *addr;
3466 struct ieee80211_key_seq seq;
3467 u16 p1k[5];
3468 u32 sta_id;
3469 bool mfp = false;
3470
3471 if (sta) {
3472 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3473
3474 sta_id = mvm_sta->sta_id;
3475 mfp = sta->mfp;
3476 } else if (vif->type == NL80211_IFTYPE_AP &&
3477 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3478 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3479
3480 sta_id = mvmvif->mcast_sta.sta_id;
3481 } else {
3482 IWL_ERR(mvm, "Failed to find station id\n");
3483 return -EINVAL;
3484 }
3485
3486 switch (keyconf->cipher) {
3487 case WLAN_CIPHER_SUITE_TKIP:
3488 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3489 /* get phase 1 key from mac80211 */
3490 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3491 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3492 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3493 seq.tkip.iv32, p1k, 0, key_offset,
3494 mfp);
3495 break;
3496 case WLAN_CIPHER_SUITE_CCMP:
3497 case WLAN_CIPHER_SUITE_WEP40:
3498 case WLAN_CIPHER_SUITE_WEP104:
3499 case WLAN_CIPHER_SUITE_GCMP:
3500 case WLAN_CIPHER_SUITE_GCMP_256:
3501 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3502 0, NULL, 0, key_offset, mfp);
3503 break;
3504 default:
3505 ret = iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3506 0, NULL, 0, key_offset, mfp);
3507 }
3508
3509 return ret;
3510 }
3511
iwl_mvm_set_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf,u8 key_offset)3512 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3513 struct ieee80211_vif *vif,
3514 struct ieee80211_sta *sta,
3515 struct ieee80211_key_conf *keyconf,
3516 u8 key_offset)
3517 {
3518 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3519 struct iwl_mvm_sta *mvm_sta;
3520 u8 sta_id = IWL_MVM_INVALID_STA;
3521 int ret;
3522 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3523
3524 lockdep_assert_held(&mvm->mutex);
3525
3526 if (vif->type != NL80211_IFTYPE_AP ||
3527 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3528 /* Get the station id from the mvm local station table */
3529 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3530 if (!mvm_sta) {
3531 IWL_ERR(mvm, "Failed to find station\n");
3532 return -EINVAL;
3533 }
3534 sta_id = mvm_sta->sta_id;
3535
3536 /*
3537 * It is possible that the 'sta' parameter is NULL, and thus
3538 * there is a need to retrieve the sta from the local station
3539 * table.
3540 */
3541 if (!sta) {
3542 sta = rcu_dereference_protected(
3543 mvm->fw_id_to_mac_id[sta_id],
3544 lockdep_is_held(&mvm->mutex));
3545 if (IS_ERR_OR_NULL(sta)) {
3546 IWL_ERR(mvm, "Invalid station id\n");
3547 return -EINVAL;
3548 }
3549 }
3550
3551 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3552 return -EINVAL;
3553 } else {
3554 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3555
3556 sta_id = mvmvif->mcast_sta.sta_id;
3557 }
3558
3559 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3560 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3561 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3562 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3563 goto end;
3564 }
3565
3566 /* If the key_offset is not pre-assigned, we need to find a
3567 * new offset to use. In normal cases, the offset is not
3568 * pre-assigned, but during HW_RESTART we want to reuse the
3569 * same indices, so we pass them when this function is called.
3570 *
3571 * In D3 entry, we need to hardcoded the indices (because the
3572 * firmware hardcodes the PTK offset to 0). In this case, we
3573 * need to make sure we don't overwrite the hw_key_idx in the
3574 * keyconf structure, because otherwise we cannot configure
3575 * the original ones back when resuming.
3576 */
3577 if (key_offset == STA_KEY_IDX_INVALID) {
3578 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3579 if (key_offset == STA_KEY_IDX_INVALID)
3580 return -ENOSPC;
3581 keyconf->hw_key_idx = key_offset;
3582 }
3583
3584 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3585 if (ret)
3586 goto end;
3587
3588 /*
3589 * For WEP, the same key is used for multicast and unicast. Upload it
3590 * again, using the same key offset, and now pointing the other one
3591 * to the same key slot (offset).
3592 * If this fails, remove the original as well.
3593 */
3594 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3595 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3596 sta) {
3597 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3598 key_offset, !mcast);
3599 if (ret) {
3600 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3601 goto end;
3602 }
3603 }
3604
3605 __set_bit(key_offset, mvm->fw_key_table);
3606
3607 end:
3608 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3609 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3610 sta ? sta->addr : zero_addr, ret);
3611 return ret;
3612 }
3613
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3614 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3615 struct ieee80211_vif *vif,
3616 struct ieee80211_sta *sta,
3617 struct ieee80211_key_conf *keyconf)
3618 {
3619 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3620 struct iwl_mvm_sta *mvm_sta;
3621 u8 sta_id = IWL_MVM_INVALID_STA;
3622 int ret, i;
3623
3624 lockdep_assert_held(&mvm->mutex);
3625
3626 /* Get the station from the mvm local station table */
3627 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3628 if (mvm_sta)
3629 sta_id = mvm_sta->sta_id;
3630 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3631 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3632
3633
3634 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3635 keyconf->keyidx, sta_id);
3636
3637 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3638 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3639 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3640 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3641
3642 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3643 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3644 keyconf->hw_key_idx);
3645 return -ENOENT;
3646 }
3647
3648 /* track which key was deleted last */
3649 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3650 if (mvm->fw_key_deleted[i] < U8_MAX)
3651 mvm->fw_key_deleted[i]++;
3652 }
3653 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3654
3655 if (sta && !mvm_sta) {
3656 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3657 return 0;
3658 }
3659
3660 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3661 if (ret)
3662 return ret;
3663
3664 /* delete WEP key twice to get rid of (now useless) offset */
3665 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3666 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3667 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3668
3669 return ret;
3670 }
3671
iwl_mvm_update_tkip_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_key_conf * keyconf,struct ieee80211_sta * sta,u32 iv32,u16 * phase1key)3672 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3673 struct ieee80211_vif *vif,
3674 struct ieee80211_key_conf *keyconf,
3675 struct ieee80211_sta *sta, u32 iv32,
3676 u16 *phase1key)
3677 {
3678 struct iwl_mvm_sta *mvm_sta;
3679 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3680 bool mfp = sta ? sta->mfp : false;
3681
3682 rcu_read_lock();
3683
3684 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3685 if (WARN_ON_ONCE(!mvm_sta))
3686 goto unlock;
3687 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3688 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3689 mfp);
3690
3691 unlock:
3692 rcu_read_unlock();
3693 }
3694
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)3695 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3696 struct ieee80211_sta *sta)
3697 {
3698 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3699 struct iwl_mvm_add_sta_cmd cmd = {
3700 .add_modify = STA_MODE_MODIFY,
3701 .sta_id = mvmsta->sta_id,
3702 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3703 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3704 };
3705 int ret;
3706
3707 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3708 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3709 if (ret)
3710 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3711 }
3712
iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum ieee80211_frame_release_type reason,u16 cnt,u16 tids,bool more_data,bool single_sta_queue)3713 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3714 struct ieee80211_sta *sta,
3715 enum ieee80211_frame_release_type reason,
3716 u16 cnt, u16 tids, bool more_data,
3717 bool single_sta_queue)
3718 {
3719 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3720 struct iwl_mvm_add_sta_cmd cmd = {
3721 .add_modify = STA_MODE_MODIFY,
3722 .sta_id = mvmsta->sta_id,
3723 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3724 .sleep_tx_count = cpu_to_le16(cnt),
3725 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3726 };
3727 int tid, ret;
3728 unsigned long _tids = tids;
3729
3730 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3731 * Note that this field is reserved and unused by firmware not
3732 * supporting GO uAPSD, so it's safe to always do this.
3733 */
3734 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3735 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3736
3737 /* If we're releasing frames from aggregation or dqa queues then check
3738 * if all the queues that we're releasing frames from, combined, have:
3739 * - more frames than the service period, in which case more_data
3740 * needs to be set
3741 * - fewer than 'cnt' frames, in which case we need to adjust the
3742 * firmware command (but do that unconditionally)
3743 */
3744 if (single_sta_queue) {
3745 int remaining = cnt;
3746 int sleep_tx_count;
3747
3748 spin_lock_bh(&mvmsta->lock);
3749 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3750 struct iwl_mvm_tid_data *tid_data;
3751 u16 n_queued;
3752
3753 tid_data = &mvmsta->tid_data[tid];
3754
3755 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3756 if (n_queued > remaining) {
3757 more_data = true;
3758 remaining = 0;
3759 break;
3760 }
3761 remaining -= n_queued;
3762 }
3763 sleep_tx_count = cnt - remaining;
3764 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3765 mvmsta->sleep_tx_count = sleep_tx_count;
3766 spin_unlock_bh(&mvmsta->lock);
3767
3768 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3769 if (WARN_ON(cnt - remaining == 0)) {
3770 ieee80211_sta_eosp(sta);
3771 return;
3772 }
3773 }
3774
3775 /* Note: this is ignored by firmware not supporting GO uAPSD */
3776 if (more_data)
3777 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3778
3779 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3780 mvmsta->next_status_eosp = true;
3781 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3782 } else {
3783 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3784 }
3785
3786 /* block the Tx queues until the FW updated the sleep Tx count */
3787 iwl_trans_block_txq_ptrs(mvm->trans, true);
3788
3789 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3790 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3791 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3792 if (ret)
3793 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3794 }
3795
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3796 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3797 struct iwl_rx_cmd_buffer *rxb)
3798 {
3799 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3800 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3801 struct ieee80211_sta *sta;
3802 u32 sta_id = le32_to_cpu(notif->sta_id);
3803
3804 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
3805 return;
3806
3807 rcu_read_lock();
3808 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3809 if (!IS_ERR_OR_NULL(sta))
3810 ieee80211_sta_eosp(sta);
3811 rcu_read_unlock();
3812 }
3813
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)3814 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3815 struct iwl_mvm_sta *mvmsta, bool disable)
3816 {
3817 struct iwl_mvm_add_sta_cmd cmd = {
3818 .add_modify = STA_MODE_MODIFY,
3819 .sta_id = mvmsta->sta_id,
3820 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3821 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3822 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3823 };
3824 int ret;
3825
3826 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3827 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3828 if (ret)
3829 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3830 }
3831
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)3832 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3833 struct ieee80211_sta *sta,
3834 bool disable)
3835 {
3836 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3837
3838 spin_lock_bh(&mvm_sta->lock);
3839
3840 if (mvm_sta->disable_tx == disable) {
3841 spin_unlock_bh(&mvm_sta->lock);
3842 return;
3843 }
3844
3845 mvm_sta->disable_tx = disable;
3846
3847 /* Tell mac80211 to start/stop queuing tx for this station */
3848 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3849
3850 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3851
3852 spin_unlock_bh(&mvm_sta->lock);
3853 }
3854
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)3855 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3856 struct iwl_mvm_vif *mvmvif,
3857 struct iwl_mvm_int_sta *sta,
3858 bool disable)
3859 {
3860 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3861 struct iwl_mvm_add_sta_cmd cmd = {
3862 .add_modify = STA_MODE_MODIFY,
3863 .sta_id = sta->sta_id,
3864 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3865 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3866 .mac_id_n_color = cpu_to_le32(id),
3867 };
3868 int ret;
3869
3870 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, 0,
3871 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3872 if (ret)
3873 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3874 }
3875
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)3876 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3877 struct iwl_mvm_vif *mvmvif,
3878 bool disable)
3879 {
3880 struct ieee80211_sta *sta;
3881 struct iwl_mvm_sta *mvm_sta;
3882 int i;
3883
3884 lockdep_assert_held(&mvm->mutex);
3885
3886 /* Block/unblock all the stations of the given mvmvif */
3887 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
3888 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3889 lockdep_is_held(&mvm->mutex));
3890 if (IS_ERR_OR_NULL(sta))
3891 continue;
3892
3893 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3894 if (mvm_sta->mac_id_n_color !=
3895 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3896 continue;
3897
3898 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3899 }
3900
3901 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3902 return;
3903
3904 /* Need to block/unblock also multicast station */
3905 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3906 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3907 &mvmvif->mcast_sta, disable);
3908
3909 /*
3910 * Only unblock the broadcast station (FW blocks it for immediate
3911 * quiet, not the driver)
3912 */
3913 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3914 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3915 &mvmvif->bcast_sta, disable);
3916 }
3917
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)3918 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3919 {
3920 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3921 struct iwl_mvm_sta *mvmsta;
3922
3923 rcu_read_lock();
3924
3925 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3926
3927 if (!WARN_ON(!mvmsta))
3928 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3929
3930 rcu_read_unlock();
3931 }
3932
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)3933 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3934 {
3935 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3936
3937 /*
3938 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3939 * to align the wrap around of ssn so we compare relevant values.
3940 */
3941 if (mvm->trans->trans_cfg->gen2)
3942 sn &= 0xff;
3943
3944 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3945 }
3946
iwl_mvm_add_pasn_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_int_sta * sta,u8 * addr,u32 cipher,u8 * key,u32 key_len)3947 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3948 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
3949 u8 *key, u32 key_len)
3950 {
3951 int ret;
3952 u16 queue;
3953 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3954 struct ieee80211_key_conf *keyconf;
3955
3956 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
3957 NL80211_IFTYPE_UNSPECIFIED,
3958 IWL_STA_LINK);
3959 if (ret)
3960 return ret;
3961
3962 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
3963 addr, sta, &queue,
3964 IWL_MVM_TX_FIFO_BE);
3965 if (ret)
3966 goto out;
3967
3968 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL);
3969 if (!keyconf) {
3970 ret = -ENOBUFS;
3971 goto out;
3972 }
3973
3974 keyconf->cipher = cipher;
3975 memcpy(keyconf->key, key, key_len);
3976 keyconf->keylen = key_len;
3977
3978 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
3979 0, NULL, 0, 0, true);
3980 kfree(keyconf);
3981 return 0;
3982 out:
3983 iwl_mvm_dealloc_int_sta(mvm, sta);
3984 return ret;
3985 }
3986