1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2015, 2018-2021 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7 #include <net/mac80211.h>
8
9 #include "mvm.h"
10 #include "sta.h"
11 #include "rs.h"
12
13 /*
14 * New version of ADD_STA_sta command added new fields at the end of the
15 * structure, so sending the size of the relevant API's structure is enough to
16 * support both API versions.
17 */
iwl_mvm_add_sta_cmd_size(struct iwl_mvm * mvm)18 static inline int iwl_mvm_add_sta_cmd_size(struct iwl_mvm *mvm)
19 {
20 if (iwl_mvm_has_new_rx_api(mvm) ||
21 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
22 return sizeof(struct iwl_mvm_add_sta_cmd);
23 else
24 return sizeof(struct iwl_mvm_add_sta_cmd_v7);
25 }
26
iwl_mvm_find_free_sta_id(struct iwl_mvm * mvm,enum nl80211_iftype iftype)27 static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm,
28 enum nl80211_iftype iftype)
29 {
30 int sta_id;
31 u32 reserved_ids = 0;
32
33 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
34 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
35
36 lockdep_assert_held(&mvm->mutex);
37
38 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
39 if (iftype != NL80211_IFTYPE_STATION)
40 reserved_ids = BIT(0);
41
42 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
43 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
44 if (BIT(sta_id) & reserved_ids)
45 continue;
46
47 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
48 lockdep_is_held(&mvm->mutex)))
49 return sta_id;
50 }
51 return IWL_MVM_INVALID_STA;
52 }
53
54 /* 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)55 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
56 bool update, unsigned int flags)
57 {
58 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
59 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
60 .sta_id = mvm_sta->sta_id,
61 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
62 .add_modify = update ? 1 : 0,
63 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
64 STA_FLG_MIMO_EN_MSK |
65 STA_FLG_RTS_MIMO_PROT),
66 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
67 };
68 int ret;
69 u32 status;
70 u32 agg_size = 0, mpdu_dens = 0;
71
72 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
73 add_sta_cmd.station_type = mvm_sta->sta_type;
74
75 if (!update || (flags & STA_MODIFY_QUEUES)) {
76 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
77
78 if (!iwl_mvm_has_new_tx_api(mvm)) {
79 add_sta_cmd.tfd_queue_msk =
80 cpu_to_le32(mvm_sta->tfd_queue_msk);
81
82 if (flags & STA_MODIFY_QUEUES)
83 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
84 } else {
85 WARN_ON(flags & STA_MODIFY_QUEUES);
86 }
87 }
88
89 switch (sta->bandwidth) {
90 case IEEE80211_STA_RX_BW_160:
91 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
92 fallthrough;
93 case IEEE80211_STA_RX_BW_80:
94 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
95 fallthrough;
96 case IEEE80211_STA_RX_BW_40:
97 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
98 fallthrough;
99 case IEEE80211_STA_RX_BW_20:
100 if (sta->ht_cap.ht_supported)
101 add_sta_cmd.station_flags |=
102 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
103 break;
104 }
105
106 switch (sta->rx_nss) {
107 case 1:
108 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
109 break;
110 case 2:
111 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
112 break;
113 case 3 ... 8:
114 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
115 break;
116 }
117
118 switch (sta->smps_mode) {
119 case IEEE80211_SMPS_AUTOMATIC:
120 case IEEE80211_SMPS_NUM_MODES:
121 WARN_ON(1);
122 break;
123 case IEEE80211_SMPS_STATIC:
124 /* override NSS */
125 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
126 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
127 break;
128 case IEEE80211_SMPS_DYNAMIC:
129 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
130 break;
131 case IEEE80211_SMPS_OFF:
132 /* nothing */
133 break;
134 }
135
136 if (sta->ht_cap.ht_supported) {
137 add_sta_cmd.station_flags_msk |=
138 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
139 STA_FLG_AGG_MPDU_DENS_MSK);
140
141 mpdu_dens = sta->ht_cap.ampdu_density;
142 }
143
144 if (mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) {
145 add_sta_cmd.station_flags_msk |=
146 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
147 STA_FLG_AGG_MPDU_DENS_MSK);
148
149 mpdu_dens = le16_get_bits(sta->he_6ghz_capa.capa,
150 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
151 agg_size = le16_get_bits(sta->he_6ghz_capa.capa,
152 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
153 } else
154 if (sta->vht_cap.vht_supported) {
155 agg_size = sta->vht_cap.cap &
156 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
157 agg_size >>=
158 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
159 } else if (sta->ht_cap.ht_supported) {
160 agg_size = sta->ht_cap.ampdu_factor;
161 }
162
163 /* D6.0 10.12.2 A-MPDU length limit rules
164 * A STA indicates the maximum length of the A-MPDU preEOF padding
165 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
166 * Exponent field in its HT Capabilities, VHT Capabilities,
167 * and HE 6 GHz Band Capabilities elements (if present) and the
168 * Maximum AMPDU Length Exponent Extension field in its HE
169 * Capabilities element
170 */
171 if (sta->he_cap.has_he)
172 agg_size += u8_get_bits(sta->he_cap.he_cap_elem.mac_cap_info[3],
173 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
174
175 /* Limit to max A-MPDU supported by FW */
176 if (agg_size > (STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT))
177 agg_size = (STA_FLG_MAX_AGG_SIZE_4M >>
178 STA_FLG_MAX_AGG_SIZE_SHIFT);
179
180 add_sta_cmd.station_flags |=
181 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
182 add_sta_cmd.station_flags |=
183 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
184 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
185 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
186
187 if (sta->wme) {
188 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
189
190 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
191 add_sta_cmd.uapsd_acs |= BIT(AC_BK);
192 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
193 add_sta_cmd.uapsd_acs |= BIT(AC_BE);
194 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
195 add_sta_cmd.uapsd_acs |= BIT(AC_VI);
196 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
197 add_sta_cmd.uapsd_acs |= BIT(AC_VO);
198 add_sta_cmd.uapsd_acs |= add_sta_cmd.uapsd_acs << 4;
199 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
200 }
201
202 status = ADD_STA_SUCCESS;
203 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
204 iwl_mvm_add_sta_cmd_size(mvm),
205 &add_sta_cmd, &status);
206 if (ret)
207 return ret;
208
209 switch (status & IWL_ADD_STA_STATUS_MASK) {
210 case ADD_STA_SUCCESS:
211 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
212 break;
213 default:
214 ret = -EIO;
215 IWL_ERR(mvm, "ADD_STA failed\n");
216 break;
217 }
218
219 return ret;
220 }
221
iwl_mvm_rx_agg_session_expired(struct timer_list * t)222 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
223 {
224 struct iwl_mvm_baid_data *data =
225 from_timer(data, t, session_timer);
226 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
227 struct iwl_mvm_baid_data *ba_data;
228 struct ieee80211_sta *sta;
229 struct iwl_mvm_sta *mvm_sta;
230 unsigned long timeout;
231
232 rcu_read_lock();
233
234 ba_data = rcu_dereference(*rcu_ptr);
235
236 if (WARN_ON(!ba_data))
237 goto unlock;
238
239 if (!ba_data->timeout)
240 goto unlock;
241
242 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
243 if (time_is_after_jiffies(timeout)) {
244 mod_timer(&ba_data->session_timer, timeout);
245 goto unlock;
246 }
247
248 /* Timer expired */
249 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[ba_data->sta_id]);
250
251 /*
252 * sta should be valid unless the following happens:
253 * The firmware asserts which triggers a reconfig flow, but
254 * the reconfig fails before we set the pointer to sta into
255 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
256 * A-MDPU and hence the timer continues to run. Then, the
257 * timer expires and sta is NULL.
258 */
259 if (!sta)
260 goto unlock;
261
262 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
263 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
264 sta->addr, ba_data->tid);
265 unlock:
266 rcu_read_unlock();
267 }
268
269 /* 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)270 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
271 unsigned long disable_agg_tids,
272 bool remove_queue)
273 {
274 struct iwl_mvm_add_sta_cmd cmd = {};
275 struct ieee80211_sta *sta;
276 struct iwl_mvm_sta *mvmsta;
277 u32 status;
278 u8 sta_id;
279
280 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
281 return -EINVAL;
282
283 sta_id = mvm->queue_info[queue].ra_sta_id;
284
285 rcu_read_lock();
286
287 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
288
289 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
290 rcu_read_unlock();
291 return -EINVAL;
292 }
293
294 mvmsta = iwl_mvm_sta_from_mac80211(sta);
295
296 mvmsta->tid_disable_agg |= disable_agg_tids;
297
298 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
299 cmd.sta_id = mvmsta->sta_id;
300 cmd.add_modify = STA_MODE_MODIFY;
301 cmd.modify_mask = STA_MODIFY_QUEUES;
302 if (disable_agg_tids)
303 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
304 if (remove_queue)
305 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
306 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
307 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
308
309 rcu_read_unlock();
310
311 /* Notify FW of queue removal from the STA queues */
312 status = ADD_STA_SUCCESS;
313 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
314 iwl_mvm_add_sta_cmd_size(mvm),
315 &cmd, &status);
316 }
317
iwl_mvm_disable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u16 * queueptr,u8 tid,u8 flags)318 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
319 u16 *queueptr, u8 tid, u8 flags)
320 {
321 int queue = *queueptr;
322 struct iwl_scd_txq_cfg_cmd cmd = {
323 .scd_queue = queue,
324 .action = SCD_CFG_DISABLE_QUEUE,
325 };
326 int ret;
327
328 if (iwl_mvm_has_new_tx_api(mvm)) {
329 iwl_trans_txq_free(mvm->trans, queue);
330 *queueptr = IWL_MVM_INVALID_QUEUE;
331
332 return 0;
333 }
334
335 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
336 return 0;
337
338 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
339
340 cmd.action = mvm->queue_info[queue].tid_bitmap ?
341 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
342 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
343 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
344
345 IWL_DEBUG_TX_QUEUES(mvm,
346 "Disabling TXQ #%d tids=0x%x\n",
347 queue,
348 mvm->queue_info[queue].tid_bitmap);
349
350 /* If the queue is still enabled - nothing left to do in this func */
351 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
352 return 0;
353
354 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
355 cmd.tid = mvm->queue_info[queue].txq_tid;
356
357 /* Make sure queue info is correct even though we overwrite it */
358 WARN(mvm->queue_info[queue].tid_bitmap,
359 "TXQ #%d info out-of-sync - tids=0x%x\n",
360 queue, mvm->queue_info[queue].tid_bitmap);
361
362 /* If we are here - the queue is freed and we can zero out these vals */
363 mvm->queue_info[queue].tid_bitmap = 0;
364
365 if (sta) {
366 struct iwl_mvm_txq *mvmtxq =
367 iwl_mvm_txq_from_tid(sta, tid);
368
369 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
370 }
371
372 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
373 mvm->queue_info[queue].reserved = false;
374
375 iwl_trans_txq_disable(mvm->trans, queue, false);
376 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, flags,
377 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
378
379 if (ret)
380 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
381 queue, ret);
382 return ret;
383 }
384
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)385 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
386 {
387 struct ieee80211_sta *sta;
388 struct iwl_mvm_sta *mvmsta;
389 unsigned long tid_bitmap;
390 unsigned long agg_tids = 0;
391 u8 sta_id;
392 int tid;
393
394 lockdep_assert_held(&mvm->mutex);
395
396 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
397 return -EINVAL;
398
399 sta_id = mvm->queue_info[queue].ra_sta_id;
400 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
401
402 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
403 lockdep_is_held(&mvm->mutex));
404
405 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
406 return -EINVAL;
407
408 mvmsta = iwl_mvm_sta_from_mac80211(sta);
409
410 spin_lock_bh(&mvmsta->lock);
411 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
412 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
413 agg_tids |= BIT(tid);
414 }
415 spin_unlock_bh(&mvmsta->lock);
416
417 return agg_tids;
418 }
419
420 /*
421 * Remove a queue from a station's resources.
422 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
423 * doesn't disable the queue
424 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)425 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
426 {
427 struct ieee80211_sta *sta;
428 struct iwl_mvm_sta *mvmsta;
429 unsigned long tid_bitmap;
430 unsigned long disable_agg_tids = 0;
431 u8 sta_id;
432 int tid;
433
434 lockdep_assert_held(&mvm->mutex);
435
436 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
437 return -EINVAL;
438
439 sta_id = mvm->queue_info[queue].ra_sta_id;
440 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
441
442 rcu_read_lock();
443
444 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
445
446 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
447 rcu_read_unlock();
448 return 0;
449 }
450
451 mvmsta = iwl_mvm_sta_from_mac80211(sta);
452
453 spin_lock_bh(&mvmsta->lock);
454 /* Unmap MAC queues and TIDs from this queue */
455 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
456 struct iwl_mvm_txq *mvmtxq =
457 iwl_mvm_txq_from_tid(sta, tid);
458
459 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
460 disable_agg_tids |= BIT(tid);
461 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
462
463 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
464 }
465
466 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
467 spin_unlock_bh(&mvmsta->lock);
468
469 rcu_read_unlock();
470
471 /*
472 * The TX path may have been using this TXQ_ID from the tid_data,
473 * so make sure it's no longer running so that we can safely reuse
474 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
475 * above, but nothing guarantees we've stopped using them. Thus,
476 * without this, we could get to iwl_mvm_disable_txq() and remove
477 * the queue while still sending frames to it.
478 */
479 synchronize_net();
480
481 return disable_agg_tids;
482 }
483
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,struct ieee80211_sta * old_sta,u8 new_sta_id)484 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
485 struct ieee80211_sta *old_sta,
486 u8 new_sta_id)
487 {
488 struct iwl_mvm_sta *mvmsta;
489 u8 sta_id, tid;
490 unsigned long disable_agg_tids = 0;
491 bool same_sta;
492 u16 queue_tmp = queue;
493 int ret;
494
495 lockdep_assert_held(&mvm->mutex);
496
497 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
498 return -EINVAL;
499
500 sta_id = mvm->queue_info[queue].ra_sta_id;
501 tid = mvm->queue_info[queue].txq_tid;
502
503 same_sta = sta_id == new_sta_id;
504
505 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
506 if (WARN_ON(!mvmsta))
507 return -EINVAL;
508
509 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
510 /* Disable the queue */
511 if (disable_agg_tids)
512 iwl_mvm_invalidate_sta_queue(mvm, queue,
513 disable_agg_tids, false);
514
515 ret = iwl_mvm_disable_txq(mvm, old_sta, &queue_tmp, tid, 0);
516 if (ret) {
517 IWL_ERR(mvm,
518 "Failed to free inactive queue %d (ret=%d)\n",
519 queue, ret);
520
521 return ret;
522 }
523
524 /* If TXQ is allocated to another STA, update removal in FW */
525 if (!same_sta)
526 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
527
528 return 0;
529 }
530
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)531 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
532 unsigned long tfd_queue_mask, u8 ac)
533 {
534 int queue = 0;
535 u8 ac_to_queue[IEEE80211_NUM_ACS];
536 int i;
537
538 /*
539 * This protects us against grabbing a queue that's being reconfigured
540 * by the inactivity checker.
541 */
542 lockdep_assert_held(&mvm->mutex);
543
544 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
545 return -EINVAL;
546
547 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
548
549 /* See what ACs the existing queues for this STA have */
550 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
551 /* Only DATA queues can be shared */
552 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
553 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
554 continue;
555
556 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
557 }
558
559 /*
560 * The queue to share is chosen only from DATA queues as follows (in
561 * descending priority):
562 * 1. An AC_BE queue
563 * 2. Same AC queue
564 * 3. Highest AC queue that is lower than new AC
565 * 4. Any existing AC (there always is at least 1 DATA queue)
566 */
567
568 /* Priority 1: An AC_BE queue */
569 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
570 queue = ac_to_queue[IEEE80211_AC_BE];
571 /* Priority 2: Same AC queue */
572 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
573 queue = ac_to_queue[ac];
574 /* Priority 3a: If new AC is VO and VI exists - use VI */
575 else if (ac == IEEE80211_AC_VO &&
576 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
577 queue = ac_to_queue[IEEE80211_AC_VI];
578 /* Priority 3b: No BE so only AC less than the new one is BK */
579 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
580 queue = ac_to_queue[IEEE80211_AC_BK];
581 /* Priority 4a: No BE nor BK - use VI if exists */
582 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
583 queue = ac_to_queue[IEEE80211_AC_VI];
584 /* Priority 4b: No BE, BK nor VI - use VO if exists */
585 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
586 queue = ac_to_queue[IEEE80211_AC_VO];
587
588 /* Make sure queue found (or not) is legal */
589 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
590 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
591 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
592 IWL_ERR(mvm, "No DATA queues available to share\n");
593 return -ENOSPC;
594 }
595
596 return queue;
597 }
598
599 /*
600 * If a given queue has a higher AC than the TID stream that is being compared
601 * to, the queue needs to be redirected to the lower AC. This function does that
602 * in such a case, otherwise - if no redirection required - it does nothing,
603 * unless the %force param is true.
604 */
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)605 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
606 int ac, int ssn, unsigned int wdg_timeout,
607 bool force, struct iwl_mvm_txq *txq)
608 {
609 struct iwl_scd_txq_cfg_cmd cmd = {
610 .scd_queue = queue,
611 .action = SCD_CFG_DISABLE_QUEUE,
612 };
613 bool shared_queue;
614 int ret;
615
616 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
617 return -EINVAL;
618
619 /*
620 * If the AC is lower than current one - FIFO needs to be redirected to
621 * the lowest one of the streams in the queue. Check if this is needed
622 * here.
623 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
624 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
625 * we need to check if the numerical value of X is LARGER than of Y.
626 */
627 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
628 IWL_DEBUG_TX_QUEUES(mvm,
629 "No redirection needed on TXQ #%d\n",
630 queue);
631 return 0;
632 }
633
634 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
635 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
636 cmd.tid = mvm->queue_info[queue].txq_tid;
637 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
638
639 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
640 queue, iwl_mvm_ac_to_tx_fifo[ac]);
641
642 /* Stop the queue and wait for it to empty */
643 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
644
645 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
646 if (ret) {
647 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
648 queue);
649 ret = -EIO;
650 goto out;
651 }
652
653 /* Before redirecting the queue we need to de-activate it */
654 iwl_trans_txq_disable(mvm->trans, queue, false);
655 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
656 if (ret)
657 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
658 ret);
659
660 /* Make sure the SCD wrptr is correctly set before reconfiguring */
661 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
662
663 /* Update the TID "owner" of the queue */
664 mvm->queue_info[queue].txq_tid = tid;
665
666 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
667
668 /* Redirect to lower AC */
669 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
670 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
671
672 /* Update AC marking of the queue */
673 mvm->queue_info[queue].mac80211_ac = ac;
674
675 /*
676 * Mark queue as shared in transport if shared
677 * Note this has to be done after queue enablement because enablement
678 * can also set this value, and there is no indication there to shared
679 * queues
680 */
681 if (shared_queue)
682 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
683
684 out:
685 /* Continue using the queue */
686 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
687
688 return ret;
689 }
690
iwl_mvm_find_free_queue(struct iwl_mvm * mvm,u8 sta_id,u8 minq,u8 maxq)691 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
692 u8 minq, u8 maxq)
693 {
694 int i;
695
696 lockdep_assert_held(&mvm->mutex);
697
698 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
699 "max queue %d >= num_of_queues (%d)", maxq,
700 mvm->trans->trans_cfg->base_params->num_of_queues))
701 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
702
703 /* This should not be hit with new TX path */
704 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
705 return -ENOSPC;
706
707 /* Start by looking for a free queue */
708 for (i = minq; i <= maxq; i++)
709 if (mvm->queue_info[i].tid_bitmap == 0 &&
710 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
711 return i;
712
713 return -ENOSPC;
714 }
715
iwl_mvm_tvqm_enable_txq(struct iwl_mvm * mvm,u8 sta_id,u8 tid,unsigned int timeout)716 static int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
717 u8 sta_id, u8 tid, unsigned int timeout)
718 {
719 int queue, size = max_t(u32, IWL_DEFAULT_QUEUE_SIZE,
720 mvm->trans->cfg->min_256_ba_txq_size);
721
722 if (tid == IWL_MAX_TID_COUNT) {
723 tid = IWL_MGMT_TID;
724 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
725 mvm->trans->cfg->min_txq_size);
726 }
727
728 do {
729 __le16 enable = cpu_to_le16(TX_QUEUE_CFG_ENABLE_QUEUE);
730
731 queue = iwl_trans_txq_alloc(mvm->trans, enable,
732 sta_id, tid, SCD_QUEUE_CFG,
733 size, timeout);
734
735 if (queue < 0)
736 IWL_DEBUG_TX_QUEUES(mvm,
737 "Failed allocating TXQ of size %d for sta %d tid %d, ret: %d\n",
738 size, sta_id, tid, queue);
739 size /= 2;
740 } while (queue < 0 && size >= 16);
741
742 if (queue < 0)
743 return queue;
744
745 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta %d tid %d\n",
746 queue, sta_id, tid);
747
748 return queue;
749 }
750
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)751 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
752 struct ieee80211_sta *sta, u8 ac,
753 int tid)
754 {
755 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
756 struct iwl_mvm_txq *mvmtxq =
757 iwl_mvm_txq_from_tid(sta, tid);
758 unsigned int wdg_timeout =
759 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
760 int queue = -1;
761
762 lockdep_assert_held(&mvm->mutex);
763
764 IWL_DEBUG_TX_QUEUES(mvm,
765 "Allocating queue for sta %d on tid %d\n",
766 mvmsta->sta_id, tid);
767 queue = iwl_mvm_tvqm_enable_txq(mvm, mvmsta->sta_id, tid, wdg_timeout);
768 if (queue < 0)
769 return queue;
770
771 mvmtxq->txq_id = queue;
772 mvm->tvqm_info[queue].txq_tid = tid;
773 mvm->tvqm_info[queue].sta_id = mvmsta->sta_id;
774
775 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
776
777 spin_lock_bh(&mvmsta->lock);
778 mvmsta->tid_data[tid].txq_id = queue;
779 spin_unlock_bh(&mvmsta->lock);
780
781 return 0;
782 }
783
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)784 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
785 struct ieee80211_sta *sta,
786 int queue, u8 sta_id, u8 tid)
787 {
788 bool enable_queue = true;
789
790 /* Make sure this TID isn't already enabled */
791 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
792 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
793 queue, tid);
794 return false;
795 }
796
797 /* Update mappings and refcounts */
798 if (mvm->queue_info[queue].tid_bitmap)
799 enable_queue = false;
800
801 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
802 mvm->queue_info[queue].ra_sta_id = sta_id;
803
804 if (enable_queue) {
805 if (tid != IWL_MAX_TID_COUNT)
806 mvm->queue_info[queue].mac80211_ac =
807 tid_to_mac80211_ac[tid];
808 else
809 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
810
811 mvm->queue_info[queue].txq_tid = tid;
812 }
813
814 if (sta) {
815 struct iwl_mvm_txq *mvmtxq =
816 iwl_mvm_txq_from_tid(sta, tid);
817
818 mvmtxq->txq_id = queue;
819 }
820
821 IWL_DEBUG_TX_QUEUES(mvm,
822 "Enabling TXQ #%d tids=0x%x\n",
823 queue, mvm->queue_info[queue].tid_bitmap);
824
825 return enable_queue;
826 }
827
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)828 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
829 int queue, u16 ssn,
830 const struct iwl_trans_txq_scd_cfg *cfg,
831 unsigned int wdg_timeout)
832 {
833 struct iwl_scd_txq_cfg_cmd cmd = {
834 .scd_queue = queue,
835 .action = SCD_CFG_ENABLE_QUEUE,
836 .window = cfg->frame_limit,
837 .sta_id = cfg->sta_id,
838 .ssn = cpu_to_le16(ssn),
839 .tx_fifo = cfg->fifo,
840 .aggregate = cfg->aggregate,
841 .tid = cfg->tid,
842 };
843 bool inc_ssn;
844
845 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
846 return false;
847
848 /* Send the enabling command if we need to */
849 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
850 return false;
851
852 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
853 NULL, wdg_timeout);
854 if (inc_ssn)
855 le16_add_cpu(&cmd.ssn, 1);
856
857 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
858 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
859
860 return inc_ssn;
861 }
862
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)863 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
864 {
865 struct iwl_scd_txq_cfg_cmd cmd = {
866 .scd_queue = queue,
867 .action = SCD_CFG_UPDATE_QUEUE_TID,
868 };
869 int tid;
870 unsigned long tid_bitmap;
871 int ret;
872
873 lockdep_assert_held(&mvm->mutex);
874
875 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
876 return;
877
878 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
879
880 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
881 return;
882
883 /* Find any TID for queue */
884 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
885 cmd.tid = tid;
886 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
887
888 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
889 if (ret) {
890 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
891 queue, ret);
892 return;
893 }
894
895 mvm->queue_info[queue].txq_tid = tid;
896 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
897 queue, tid);
898 }
899
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)900 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
901 {
902 struct ieee80211_sta *sta;
903 struct iwl_mvm_sta *mvmsta;
904 u8 sta_id;
905 int tid = -1;
906 unsigned long tid_bitmap;
907 unsigned int wdg_timeout;
908 int ssn;
909 int ret = true;
910
911 /* queue sharing is disabled on new TX path */
912 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
913 return;
914
915 lockdep_assert_held(&mvm->mutex);
916
917 sta_id = mvm->queue_info[queue].ra_sta_id;
918 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
919
920 /* Find TID for queue, and make sure it is the only one on the queue */
921 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
922 if (tid_bitmap != BIT(tid)) {
923 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
924 queue, tid_bitmap);
925 return;
926 }
927
928 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
929 tid);
930
931 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
932 lockdep_is_held(&mvm->mutex));
933
934 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
935 return;
936
937 mvmsta = iwl_mvm_sta_from_mac80211(sta);
938 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
939
940 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
941
942 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
943 tid_to_mac80211_ac[tid], ssn,
944 wdg_timeout, true,
945 iwl_mvm_txq_from_tid(sta, tid));
946 if (ret) {
947 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
948 return;
949 }
950
951 /* If aggs should be turned back on - do it */
952 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
953 struct iwl_mvm_add_sta_cmd cmd = {0};
954
955 mvmsta->tid_disable_agg &= ~BIT(tid);
956
957 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
958 cmd.sta_id = mvmsta->sta_id;
959 cmd.add_modify = STA_MODE_MODIFY;
960 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
961 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
962 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
963
964 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
965 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
966 if (!ret) {
967 IWL_DEBUG_TX_QUEUES(mvm,
968 "TXQ #%d is now aggregated again\n",
969 queue);
970
971 /* Mark queue intenally as aggregating again */
972 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
973 }
974 }
975
976 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
977 }
978
979 /*
980 * Remove inactive TIDs of a given queue.
981 * If all queue TIDs are inactive - mark the queue as inactive
982 * If only some the queue TIDs are inactive - unmap them from the queue
983 *
984 * Returns %true if all TIDs were removed and the queue could be reused.
985 */
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)986 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
987 struct iwl_mvm_sta *mvmsta, int queue,
988 unsigned long tid_bitmap,
989 unsigned long *unshare_queues,
990 unsigned long *changetid_queues)
991 {
992 int tid;
993
994 lockdep_assert_held(&mvmsta->lock);
995 lockdep_assert_held(&mvm->mutex);
996
997 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
998 return false;
999
1000 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1001 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1002 /* If some TFDs are still queued - don't mark TID as inactive */
1003 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1004 tid_bitmap &= ~BIT(tid);
1005
1006 /* Don't mark as inactive any TID that has an active BA */
1007 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1008 tid_bitmap &= ~BIT(tid);
1009 }
1010
1011 /* If all TIDs in the queue are inactive - return it can be reused */
1012 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1013 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1014 return true;
1015 }
1016
1017 /*
1018 * If we are here, this is a shared queue and not all TIDs timed-out.
1019 * Remove the ones that did.
1020 */
1021 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1022 u16 tid_bitmap;
1023
1024 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1025 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1026
1027 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1028
1029 /*
1030 * We need to take into account a situation in which a TXQ was
1031 * allocated to TID x, and then turned shared by adding TIDs y
1032 * and z. If TID x becomes inactive and is removed from the TXQ,
1033 * ownership must be given to one of the remaining TIDs.
1034 * This is mainly because if TID x continues - a new queue can't
1035 * be allocated for it as long as it is an owner of another TXQ.
1036 *
1037 * Mark this queue in the right bitmap, we'll send the command
1038 * to the firmware later.
1039 */
1040 if (!(tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1041 set_bit(queue, changetid_queues);
1042
1043 IWL_DEBUG_TX_QUEUES(mvm,
1044 "Removing inactive TID %d from shared Q:%d\n",
1045 tid, queue);
1046 }
1047
1048 IWL_DEBUG_TX_QUEUES(mvm,
1049 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1050 mvm->queue_info[queue].tid_bitmap);
1051
1052 /*
1053 * There may be different TIDs with the same mac queues, so make
1054 * sure all TIDs have existing corresponding mac queues enabled
1055 */
1056 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1057
1058 /* If the queue is marked as shared - "unshare" it */
1059 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1060 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1061 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1062 queue);
1063 set_bit(queue, unshare_queues);
1064 }
1065
1066 return false;
1067 }
1068
1069 /*
1070 * Check for inactivity - this includes checking if any queue
1071 * can be unshared and finding one (and only one) that can be
1072 * reused.
1073 * This function is also invoked as a sort of clean-up task,
1074 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1075 *
1076 * Returns the queue number, or -ENOSPC.
1077 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1078 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1079 {
1080 unsigned long now = jiffies;
1081 unsigned long unshare_queues = 0;
1082 unsigned long changetid_queues = 0;
1083 int i, ret, free_queue = -ENOSPC;
1084 struct ieee80211_sta *queue_owner = NULL;
1085
1086 lockdep_assert_held(&mvm->mutex);
1087
1088 if (iwl_mvm_has_new_tx_api(mvm))
1089 return -ENOSPC;
1090
1091 rcu_read_lock();
1092
1093 /* we skip the CMD queue below by starting at 1 */
1094 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1095
1096 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1097 struct ieee80211_sta *sta;
1098 struct iwl_mvm_sta *mvmsta;
1099 u8 sta_id;
1100 int tid;
1101 unsigned long inactive_tid_bitmap = 0;
1102 unsigned long queue_tid_bitmap;
1103
1104 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1105 if (!queue_tid_bitmap)
1106 continue;
1107
1108 /* If TXQ isn't in active use anyway - nothing to do here... */
1109 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1110 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1111 continue;
1112
1113 /* Check to see if there are inactive TIDs on this queue */
1114 for_each_set_bit(tid, &queue_tid_bitmap,
1115 IWL_MAX_TID_COUNT + 1) {
1116 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1117 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1118 continue;
1119
1120 inactive_tid_bitmap |= BIT(tid);
1121 }
1122
1123 /* If all TIDs are active - finish check on this queue */
1124 if (!inactive_tid_bitmap)
1125 continue;
1126
1127 /*
1128 * If we are here - the queue hadn't been served recently and is
1129 * in use
1130 */
1131
1132 sta_id = mvm->queue_info[i].ra_sta_id;
1133 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1134
1135 /*
1136 * If the STA doesn't exist anymore, it isn't an error. It could
1137 * be that it was removed since getting the queues, and in this
1138 * case it should've inactivated its queues anyway.
1139 */
1140 if (IS_ERR_OR_NULL(sta))
1141 continue;
1142
1143 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1144
1145 spin_lock_bh(&mvmsta->lock);
1146 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1147 inactive_tid_bitmap,
1148 &unshare_queues,
1149 &changetid_queues);
1150 if (ret && free_queue < 0) {
1151 queue_owner = sta;
1152 free_queue = i;
1153 }
1154 /* only unlock sta lock - we still need the queue info lock */
1155 spin_unlock_bh(&mvmsta->lock);
1156 }
1157
1158
1159 /* Reconfigure queues requiring reconfiguation */
1160 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1161 iwl_mvm_unshare_queue(mvm, i);
1162 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1163 iwl_mvm_change_queue_tid(mvm, i);
1164
1165 rcu_read_unlock();
1166
1167 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1168 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1169 alloc_for_sta);
1170 if (ret)
1171 return ret;
1172 }
1173
1174 return free_queue;
1175 }
1176
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1177 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1178 struct ieee80211_sta *sta, u8 ac, int tid)
1179 {
1180 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1181 struct iwl_trans_txq_scd_cfg cfg = {
1182 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1183 .sta_id = mvmsta->sta_id,
1184 .tid = tid,
1185 .frame_limit = IWL_FRAME_LIMIT,
1186 };
1187 unsigned int wdg_timeout =
1188 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1189 int queue = -1;
1190 u16 queue_tmp;
1191 unsigned long disable_agg_tids = 0;
1192 enum iwl_mvm_agg_state queue_state;
1193 bool shared_queue = false, inc_ssn;
1194 int ssn;
1195 unsigned long tfd_queue_mask;
1196 int ret;
1197
1198 lockdep_assert_held(&mvm->mutex);
1199
1200 if (iwl_mvm_has_new_tx_api(mvm))
1201 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1202
1203 spin_lock_bh(&mvmsta->lock);
1204 tfd_queue_mask = mvmsta->tfd_queue_msk;
1205 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1206 spin_unlock_bh(&mvmsta->lock);
1207
1208 if (tid == IWL_MAX_TID_COUNT) {
1209 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1210 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1211 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1212 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1213 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1214 queue);
1215
1216 /* If no such queue is found, we'll use a DATA queue instead */
1217 }
1218
1219 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1220 (mvm->queue_info[mvmsta->reserved_queue].status ==
1221 IWL_MVM_QUEUE_RESERVED)) {
1222 queue = mvmsta->reserved_queue;
1223 mvm->queue_info[queue].reserved = true;
1224 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1225 }
1226
1227 if (queue < 0)
1228 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1229 IWL_MVM_DQA_MIN_DATA_QUEUE,
1230 IWL_MVM_DQA_MAX_DATA_QUEUE);
1231 if (queue < 0) {
1232 /* try harder - perhaps kill an inactive queue */
1233 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1234 }
1235
1236 /* No free queue - we'll have to share */
1237 if (queue <= 0) {
1238 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1239 if (queue > 0) {
1240 shared_queue = true;
1241 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1242 }
1243 }
1244
1245 /*
1246 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1247 * to make sure no one else takes it.
1248 * This will allow avoiding re-acquiring the lock at the end of the
1249 * configuration. On error we'll mark it back as free.
1250 */
1251 if (queue > 0 && !shared_queue)
1252 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1253
1254 /* This shouldn't happen - out of queues */
1255 if (WARN_ON(queue <= 0)) {
1256 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1257 tid, cfg.sta_id);
1258 return queue;
1259 }
1260
1261 /*
1262 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1263 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1264 * as aggregatable.
1265 * Mark all DATA queues as allowing to be aggregated at some point
1266 */
1267 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1268 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1269
1270 IWL_DEBUG_TX_QUEUES(mvm,
1271 "Allocating %squeue #%d to sta %d on tid %d\n",
1272 shared_queue ? "shared " : "", queue,
1273 mvmsta->sta_id, tid);
1274
1275 if (shared_queue) {
1276 /* Disable any open aggs on this queue */
1277 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1278
1279 if (disable_agg_tids) {
1280 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1281 queue);
1282 iwl_mvm_invalidate_sta_queue(mvm, queue,
1283 disable_agg_tids, false);
1284 }
1285 }
1286
1287 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1288
1289 /*
1290 * Mark queue as shared in transport if shared
1291 * Note this has to be done after queue enablement because enablement
1292 * can also set this value, and there is no indication there to shared
1293 * queues
1294 */
1295 if (shared_queue)
1296 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1297
1298 spin_lock_bh(&mvmsta->lock);
1299 /*
1300 * This looks racy, but it is not. We have only one packet for
1301 * this ra/tid in our Tx path since we stop the Qdisc when we
1302 * need to allocate a new TFD queue.
1303 */
1304 if (inc_ssn) {
1305 mvmsta->tid_data[tid].seq_number += 0x10;
1306 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1307 }
1308 mvmsta->tid_data[tid].txq_id = queue;
1309 mvmsta->tfd_queue_msk |= BIT(queue);
1310 queue_state = mvmsta->tid_data[tid].state;
1311
1312 if (mvmsta->reserved_queue == queue)
1313 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1314 spin_unlock_bh(&mvmsta->lock);
1315
1316 if (!shared_queue) {
1317 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1318 if (ret)
1319 goto out_err;
1320
1321 /* If we need to re-enable aggregations... */
1322 if (queue_state == IWL_AGG_ON) {
1323 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1324 if (ret)
1325 goto out_err;
1326 }
1327 } else {
1328 /* Redirect queue, if needed */
1329 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1330 wdg_timeout, false,
1331 iwl_mvm_txq_from_tid(sta, tid));
1332 if (ret)
1333 goto out_err;
1334 }
1335
1336 return 0;
1337
1338 out_err:
1339 queue_tmp = queue;
1340 iwl_mvm_disable_txq(mvm, sta, &queue_tmp, tid, 0);
1341
1342 return ret;
1343 }
1344
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1345 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1346 {
1347 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1348 add_stream_wk);
1349
1350 mutex_lock(&mvm->mutex);
1351
1352 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1353
1354 while (!list_empty(&mvm->add_stream_txqs)) {
1355 struct iwl_mvm_txq *mvmtxq;
1356 struct ieee80211_txq *txq;
1357 u8 tid;
1358
1359 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1360 struct iwl_mvm_txq, list);
1361
1362 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1363 drv_priv);
1364 tid = txq->tid;
1365 if (tid == IEEE80211_NUM_TIDS)
1366 tid = IWL_MAX_TID_COUNT;
1367
1368 /*
1369 * We can't really do much here, but if this fails we can't
1370 * transmit anyway - so just don't transmit the frame etc.
1371 * and let them back up ... we've tried our best to allocate
1372 * a queue in the function itself.
1373 */
1374 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1375 list_del_init(&mvmtxq->list);
1376 continue;
1377 }
1378
1379 list_del_init(&mvmtxq->list);
1380 local_bh_disable();
1381 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1382 local_bh_enable();
1383 }
1384
1385 mutex_unlock(&mvm->mutex);
1386 }
1387
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1388 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1389 struct ieee80211_sta *sta,
1390 enum nl80211_iftype vif_type)
1391 {
1392 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1393 int queue;
1394
1395 /* queue reserving is disabled on new TX path */
1396 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1397 return 0;
1398
1399 /* run the general cleanup/unsharing of queues */
1400 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1401
1402 /* Make sure we have free resources for this STA */
1403 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1404 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1405 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1406 IWL_MVM_QUEUE_FREE))
1407 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1408 else
1409 queue = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
1410 IWL_MVM_DQA_MIN_DATA_QUEUE,
1411 IWL_MVM_DQA_MAX_DATA_QUEUE);
1412 if (queue < 0) {
1413 /* try again - this time kick out a queue if needed */
1414 queue = iwl_mvm_inactivity_check(mvm, mvmsta->sta_id);
1415 if (queue < 0) {
1416 IWL_ERR(mvm, "No available queues for new station\n");
1417 return -ENOSPC;
1418 }
1419 }
1420 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1421
1422 mvmsta->reserved_queue = queue;
1423
1424 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1425 queue, mvmsta->sta_id);
1426
1427 return 0;
1428 }
1429
1430 /*
1431 * In DQA mode, after a HW restart the queues should be allocated as before, in
1432 * order to avoid race conditions when there are shared queues. This function
1433 * does the re-mapping and queue allocation.
1434 *
1435 * Note that re-enabling aggregations isn't done in this function.
1436 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1437 static void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1438 struct ieee80211_sta *sta)
1439 {
1440 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1441 unsigned int wdg =
1442 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1443 int i;
1444 struct iwl_trans_txq_scd_cfg cfg = {
1445 .sta_id = mvm_sta->sta_id,
1446 .frame_limit = IWL_FRAME_LIMIT,
1447 };
1448
1449 /* Make sure reserved queue is still marked as such (if allocated) */
1450 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1451 mvm->queue_info[mvm_sta->reserved_queue].status =
1452 IWL_MVM_QUEUE_RESERVED;
1453
1454 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1455 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1456 int txq_id = tid_data->txq_id;
1457 int ac;
1458
1459 if (txq_id == IWL_MVM_INVALID_QUEUE)
1460 continue;
1461
1462 ac = tid_to_mac80211_ac[i];
1463
1464 if (iwl_mvm_has_new_tx_api(mvm)) {
1465 IWL_DEBUG_TX_QUEUES(mvm,
1466 "Re-mapping sta %d tid %d\n",
1467 mvm_sta->sta_id, i);
1468 txq_id = iwl_mvm_tvqm_enable_txq(mvm, mvm_sta->sta_id,
1469 i, wdg);
1470 /*
1471 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1472 * to try again later, we have no other good way of
1473 * failing here
1474 */
1475 if (txq_id < 0)
1476 txq_id = IWL_MVM_INVALID_QUEUE;
1477 tid_data->txq_id = txq_id;
1478
1479 /*
1480 * Since we don't set the seq number after reset, and HW
1481 * sets it now, FW reset will cause the seq num to start
1482 * at 0 again, so driver will need to update it
1483 * internally as well, so it keeps in sync with real val
1484 */
1485 tid_data->seq_number = 0;
1486 } else {
1487 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1488
1489 cfg.tid = i;
1490 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1491 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1492 txq_id ==
1493 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1494
1495 IWL_DEBUG_TX_QUEUES(mvm,
1496 "Re-mapping sta %d tid %d to queue %d\n",
1497 mvm_sta->sta_id, i, txq_id);
1498
1499 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1500 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1501 }
1502 }
1503 }
1504
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1505 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1506 struct iwl_mvm_int_sta *sta,
1507 const u8 *addr,
1508 u16 mac_id, u16 color)
1509 {
1510 struct iwl_mvm_add_sta_cmd cmd;
1511 int ret;
1512 u32 status = ADD_STA_SUCCESS;
1513
1514 lockdep_assert_held(&mvm->mutex);
1515
1516 memset(&cmd, 0, sizeof(cmd));
1517 cmd.sta_id = sta->sta_id;
1518
1519 if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, ADD_STA,
1520 0) >= 12 &&
1521 sta->type == IWL_STA_AUX_ACTIVITY)
1522 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1523 else
1524 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1525 color));
1526
1527 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1528 cmd.station_type = sta->type;
1529
1530 if (!iwl_mvm_has_new_tx_api(mvm))
1531 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1532 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1533
1534 if (addr)
1535 memcpy(cmd.addr, addr, ETH_ALEN);
1536
1537 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1538 iwl_mvm_add_sta_cmd_size(mvm),
1539 &cmd, &status);
1540 if (ret)
1541 return ret;
1542
1543 switch (status & IWL_ADD_STA_STATUS_MASK) {
1544 case ADD_STA_SUCCESS:
1545 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1546 return 0;
1547 default:
1548 ret = -EIO;
1549 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1550 status);
1551 break;
1552 }
1553 return ret;
1554 }
1555
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1556 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1557 struct ieee80211_vif *vif,
1558 struct ieee80211_sta *sta)
1559 {
1560 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1561 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1562 struct iwl_mvm_rxq_dup_data *dup_data;
1563 int i, ret, sta_id;
1564 bool sta_update = false;
1565 unsigned int sta_flags = 0;
1566
1567 lockdep_assert_held(&mvm->mutex);
1568
1569 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1570 sta_id = iwl_mvm_find_free_sta_id(mvm,
1571 ieee80211_vif_type_p2p(vif));
1572 else
1573 sta_id = mvm_sta->sta_id;
1574
1575 if (sta_id == IWL_MVM_INVALID_STA)
1576 return -ENOSPC;
1577
1578 spin_lock_init(&mvm_sta->lock);
1579
1580 /* if this is a HW restart re-alloc existing queues */
1581 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1582 struct iwl_mvm_int_sta tmp_sta = {
1583 .sta_id = sta_id,
1584 .type = mvm_sta->sta_type,
1585 };
1586
1587 /*
1588 * First add an empty station since allocating
1589 * a queue requires a valid station
1590 */
1591 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1592 mvmvif->id, mvmvif->color);
1593 if (ret)
1594 goto err;
1595
1596 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1597 sta_update = true;
1598 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1599 goto update_fw;
1600 }
1601
1602 mvm_sta->sta_id = sta_id;
1603 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1604 mvmvif->color);
1605 mvm_sta->vif = vif;
1606 if (!mvm->trans->trans_cfg->gen2)
1607 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1608 else
1609 mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1610 mvm_sta->tx_protection = 0;
1611 mvm_sta->tt_tx_protection = false;
1612 mvm_sta->sta_type = sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK;
1613
1614 /* HW restart, don't assume the memory has been zeroed */
1615 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1616 mvm_sta->tfd_queue_msk = 0;
1617
1618 /* for HW restart - reset everything but the sequence number */
1619 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1620 u16 seq = mvm_sta->tid_data[i].seq_number;
1621 memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i]));
1622 mvm_sta->tid_data[i].seq_number = seq;
1623
1624 /*
1625 * Mark all queues for this STA as unallocated and defer TX
1626 * frames until the queue is allocated
1627 */
1628 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1629 }
1630
1631 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1632 struct iwl_mvm_txq *mvmtxq =
1633 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1634
1635 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1636 INIT_LIST_HEAD(&mvmtxq->list);
1637 atomic_set(&mvmtxq->tx_request, 0);
1638 }
1639
1640 mvm_sta->agg_tids = 0;
1641
1642 if (iwl_mvm_has_new_rx_api(mvm) &&
1643 !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1644 int q;
1645
1646 dup_data = kcalloc(mvm->trans->num_rx_queues,
1647 sizeof(*dup_data), GFP_KERNEL);
1648 if (!dup_data)
1649 return -ENOMEM;
1650 /*
1651 * Initialize all the last_seq values to 0xffff which can never
1652 * compare equal to the frame's seq_ctrl in the check in
1653 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1654 * number and fragmented packets don't reach that function.
1655 *
1656 * This thus allows receiving a packet with seqno 0 and the
1657 * retry bit set as the very first packet on a new TID.
1658 */
1659 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1660 memset(dup_data[q].last_seq, 0xff,
1661 sizeof(dup_data[q].last_seq));
1662 mvm_sta->dup_data = dup_data;
1663 }
1664
1665 if (!iwl_mvm_has_new_tx_api(mvm)) {
1666 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1667 ieee80211_vif_type_p2p(vif));
1668 if (ret)
1669 goto err;
1670 }
1671
1672 /*
1673 * if rs is registered with mac80211, then "add station" will be handled
1674 * via the corresponding ops, otherwise need to notify rate scaling here
1675 */
1676 if (iwl_mvm_has_tlc_offload(mvm))
1677 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1678 else
1679 spin_lock_init(&mvm_sta->lq_sta.rs_drv.pers.lock);
1680
1681 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1682
1683 update_fw:
1684 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1685 if (ret)
1686 goto err;
1687
1688 if (vif->type == NL80211_IFTYPE_STATION) {
1689 if (!sta->tdls) {
1690 WARN_ON(mvmvif->ap_sta_id != IWL_MVM_INVALID_STA);
1691 mvmvif->ap_sta_id = sta_id;
1692 } else {
1693 WARN_ON(mvmvif->ap_sta_id == IWL_MVM_INVALID_STA);
1694 }
1695 }
1696
1697 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1698
1699 return 0;
1700
1701 err:
1702 return ret;
1703 }
1704
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1705 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1706 bool drain)
1707 {
1708 struct iwl_mvm_add_sta_cmd cmd = {};
1709 int ret;
1710 u32 status;
1711
1712 lockdep_assert_held(&mvm->mutex);
1713
1714 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1715 cmd.sta_id = mvmsta->sta_id;
1716 cmd.add_modify = STA_MODE_MODIFY;
1717 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1718 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1719
1720 status = ADD_STA_SUCCESS;
1721 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1722 iwl_mvm_add_sta_cmd_size(mvm),
1723 &cmd, &status);
1724 if (ret)
1725 return ret;
1726
1727 switch (status & IWL_ADD_STA_STATUS_MASK) {
1728 case ADD_STA_SUCCESS:
1729 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1730 mvmsta->sta_id);
1731 break;
1732 default:
1733 ret = -EIO;
1734 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1735 mvmsta->sta_id);
1736 break;
1737 }
1738
1739 return ret;
1740 }
1741
1742 /*
1743 * Remove a station from the FW table. Before sending the command to remove
1744 * the station validate that the station is indeed known to the driver (sanity
1745 * only).
1746 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1747 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1748 {
1749 struct ieee80211_sta *sta;
1750 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1751 .sta_id = sta_id,
1752 };
1753 int ret;
1754
1755 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1756 lockdep_is_held(&mvm->mutex));
1757
1758 /* Note: internal stations are marked as error values */
1759 if (!sta) {
1760 IWL_ERR(mvm, "Invalid station id\n");
1761 return -EINVAL;
1762 }
1763
1764 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1765 sizeof(rm_sta_cmd), &rm_sta_cmd);
1766 if (ret) {
1767 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1768 return ret;
1769 }
1770
1771 return 0;
1772 }
1773
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1774 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1775 struct ieee80211_vif *vif,
1776 struct ieee80211_sta *sta)
1777 {
1778 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1779 int i;
1780
1781 lockdep_assert_held(&mvm->mutex);
1782
1783 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1784 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
1785 continue;
1786
1787 iwl_mvm_disable_txq(mvm, sta, &mvm_sta->tid_data[i].txq_id, i,
1788 0);
1789 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1790 }
1791
1792 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1793 struct iwl_mvm_txq *mvmtxq =
1794 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1795
1796 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1797 list_del_init(&mvmtxq->list);
1798 }
1799 }
1800
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)1801 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
1802 struct iwl_mvm_sta *mvm_sta)
1803 {
1804 int i;
1805
1806 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
1807 u16 txq_id;
1808 int ret;
1809
1810 spin_lock_bh(&mvm_sta->lock);
1811 txq_id = mvm_sta->tid_data[i].txq_id;
1812 spin_unlock_bh(&mvm_sta->lock);
1813
1814 if (txq_id == IWL_MVM_INVALID_QUEUE)
1815 continue;
1816
1817 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
1818 if (ret)
1819 return ret;
1820 }
1821
1822 return 0;
1823 }
1824
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1825 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
1826 struct ieee80211_vif *vif,
1827 struct ieee80211_sta *sta)
1828 {
1829 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1830 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1831 u8 sta_id = mvm_sta->sta_id;
1832 int ret;
1833
1834 lockdep_assert_held(&mvm->mutex);
1835
1836 if (iwl_mvm_has_new_rx_api(mvm))
1837 kfree(mvm_sta->dup_data);
1838
1839 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
1840 if (ret)
1841 return ret;
1842
1843 /* flush its queues here since we are freeing mvm_sta */
1844 ret = iwl_mvm_flush_sta(mvm, mvm_sta, false);
1845 if (ret)
1846 return ret;
1847 if (iwl_mvm_has_new_tx_api(mvm)) {
1848 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
1849 } else {
1850 u32 q_mask = mvm_sta->tfd_queue_msk;
1851
1852 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
1853 q_mask);
1854 }
1855 if (ret)
1856 return ret;
1857
1858 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
1859
1860 iwl_mvm_disable_sta_queues(mvm, vif, sta);
1861
1862 /* If there is a TXQ still marked as reserved - free it */
1863 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
1864 u8 reserved_txq = mvm_sta->reserved_queue;
1865 enum iwl_mvm_queue_status *status;
1866
1867 /*
1868 * If no traffic has gone through the reserved TXQ - it
1869 * is still marked as IWL_MVM_QUEUE_RESERVED, and
1870 * should be manually marked as free again
1871 */
1872 status = &mvm->queue_info[reserved_txq].status;
1873 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
1874 (*status != IWL_MVM_QUEUE_FREE),
1875 "sta_id %d reserved txq %d status %d",
1876 sta_id, reserved_txq, *status))
1877 return -EINVAL;
1878
1879 *status = IWL_MVM_QUEUE_FREE;
1880 }
1881
1882 if (vif->type == NL80211_IFTYPE_STATION &&
1883 mvmvif->ap_sta_id == sta_id) {
1884 /* if associated - we can't remove the AP STA now */
1885 if (vif->bss_conf.assoc)
1886 return ret;
1887
1888 /* unassoc - go ahead - remove the AP STA now */
1889 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
1890 }
1891
1892 /*
1893 * This shouldn't happen - the TDLS channel switch should be canceled
1894 * before the STA is removed.
1895 */
1896 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
1897 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
1898 cancel_delayed_work(&mvm->tdls_cs.dwork);
1899 }
1900
1901 /*
1902 * Make sure that the tx response code sees the station as -EBUSY and
1903 * calls the drain worker.
1904 */
1905 spin_lock_bh(&mvm_sta->lock);
1906 spin_unlock_bh(&mvm_sta->lock);
1907
1908 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id);
1909 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL);
1910
1911 return ret;
1912 }
1913
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)1914 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
1915 struct ieee80211_vif *vif,
1916 u8 sta_id)
1917 {
1918 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
1919
1920 lockdep_assert_held(&mvm->mutex);
1921
1922 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
1923 return ret;
1924 }
1925
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)1926 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
1927 struct iwl_mvm_int_sta *sta,
1928 u32 qmask, enum nl80211_iftype iftype,
1929 enum iwl_sta_type type)
1930 {
1931 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
1932 sta->sta_id == IWL_MVM_INVALID_STA) {
1933 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
1934 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
1935 return -ENOSPC;
1936 }
1937
1938 sta->tfd_queue_msk = qmask;
1939 sta->type = type;
1940
1941 /* put a non-NULL value so iterating over the stations won't stop */
1942 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
1943 return 0;
1944 }
1945
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)1946 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
1947 {
1948 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
1949 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
1950 sta->sta_id = IWL_MVM_INVALID_STA;
1951 }
1952
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)1953 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
1954 u8 sta_id, u8 fifo)
1955 {
1956 unsigned int wdg_timeout =
1957 mvm->trans->trans_cfg->base_params->wd_timeout;
1958 struct iwl_trans_txq_scd_cfg cfg = {
1959 .fifo = fifo,
1960 .sta_id = sta_id,
1961 .tid = IWL_MAX_TID_COUNT,
1962 .aggregate = false,
1963 .frame_limit = IWL_FRAME_LIMIT,
1964 };
1965
1966 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
1967
1968 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
1969 }
1970
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)1971 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
1972 {
1973 unsigned int wdg_timeout =
1974 mvm->trans->trans_cfg->base_params->wd_timeout;
1975
1976 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
1977
1978 return iwl_mvm_tvqm_enable_txq(mvm, sta_id, IWL_MAX_TID_COUNT,
1979 wdg_timeout);
1980 }
1981
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)1982 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
1983 int maccolor, u8 *addr,
1984 struct iwl_mvm_int_sta *sta,
1985 u16 *queue, int fifo)
1986 {
1987 int ret;
1988
1989 /* Map queue to fifo - needs to happen before adding station */
1990 if (!iwl_mvm_has_new_tx_api(mvm))
1991 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
1992
1993 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
1994 if (ret) {
1995 if (!iwl_mvm_has_new_tx_api(mvm))
1996 iwl_mvm_disable_txq(mvm, NULL, queue,
1997 IWL_MAX_TID_COUNT, 0);
1998 return ret;
1999 }
2000
2001 /*
2002 * For 22000 firmware and on we cannot add queue to a station unknown
2003 * to firmware so enable queue here - after the station was added
2004 */
2005 if (iwl_mvm_has_new_tx_api(mvm)) {
2006 int txq;
2007
2008 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2009 if (txq < 0) {
2010 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2011 return txq;
2012 }
2013
2014 *queue = txq;
2015 }
2016
2017 return 0;
2018 }
2019
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2020 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2021 {
2022 int ret;
2023
2024 lockdep_assert_held(&mvm->mutex);
2025
2026 /* Allocate aux station and assign to it the aux queue */
2027 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue),
2028 NL80211_IFTYPE_UNSPECIFIED,
2029 IWL_STA_AUX_ACTIVITY);
2030 if (ret)
2031 return ret;
2032
2033 /*
2034 * In CDB NICs we need to specify which lmac to use for aux activity
2035 * using the mac_id argument place to send lmac_id to the function
2036 */
2037 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2038 &mvm->aux_sta, &mvm->aux_queue,
2039 IWL_MVM_TX_FIFO_MCAST);
2040 if (ret) {
2041 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2042 return ret;
2043 }
2044
2045 return 0;
2046 }
2047
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2048 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2049 {
2050 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2051
2052 lockdep_assert_held(&mvm->mutex);
2053
2054 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2055 NULL, &mvm->snif_sta,
2056 &mvm->snif_queue,
2057 IWL_MVM_TX_FIFO_BE);
2058 }
2059
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2060 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2061 {
2062 int ret;
2063
2064 lockdep_assert_held(&mvm->mutex);
2065
2066 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2067 return -EINVAL;
2068
2069 iwl_mvm_disable_txq(mvm, NULL, &mvm->snif_queue, IWL_MAX_TID_COUNT, 0);
2070 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2071 if (ret)
2072 IWL_WARN(mvm, "Failed sending remove station\n");
2073
2074 return ret;
2075 }
2076
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2077 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2078 {
2079 int ret;
2080
2081 lockdep_assert_held(&mvm->mutex);
2082
2083 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2084 return -EINVAL;
2085
2086 iwl_mvm_disable_txq(mvm, NULL, &mvm->aux_queue, IWL_MAX_TID_COUNT, 0);
2087 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2088 if (ret)
2089 IWL_WARN(mvm, "Failed sending remove station\n");
2090 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2091
2092 return ret;
2093 }
2094
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2095 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2096 {
2097 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2098 }
2099
2100 /*
2101 * Send the add station command for the vif's broadcast station.
2102 * Assumes that the station was already allocated.
2103 *
2104 * @mvm: the mvm component
2105 * @vif: the interface to which the broadcast station is added
2106 * @bsta: the broadcast station to add.
2107 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2108 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2109 {
2110 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2111 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2112 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2113 const u8 *baddr = _baddr;
2114 int queue;
2115 int ret;
2116 unsigned int wdg_timeout =
2117 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2118 struct iwl_trans_txq_scd_cfg cfg = {
2119 .fifo = IWL_MVM_TX_FIFO_VO,
2120 .sta_id = mvmvif->bcast_sta.sta_id,
2121 .tid = IWL_MAX_TID_COUNT,
2122 .aggregate = false,
2123 .frame_limit = IWL_FRAME_LIMIT,
2124 };
2125
2126 lockdep_assert_held(&mvm->mutex);
2127
2128 if (!iwl_mvm_has_new_tx_api(mvm)) {
2129 if (vif->type == NL80211_IFTYPE_AP ||
2130 vif->type == NL80211_IFTYPE_ADHOC) {
2131 queue = mvm->probe_queue;
2132 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2133 queue = mvm->p2p_dev_queue;
2134 } else {
2135 WARN(1, "Missing required TXQ for adding bcast STA\n");
2136 return -EINVAL;
2137 }
2138
2139 bsta->tfd_queue_msk |= BIT(queue);
2140
2141 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2142 }
2143
2144 if (vif->type == NL80211_IFTYPE_ADHOC)
2145 baddr = vif->bss_conf.bssid;
2146
2147 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2148 return -ENOSPC;
2149
2150 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2151 mvmvif->id, mvmvif->color);
2152 if (ret)
2153 return ret;
2154
2155 /*
2156 * For 22000 firmware and on we cannot add queue to a station unknown
2157 * to firmware so enable queue here - after the station was added
2158 */
2159 if (iwl_mvm_has_new_tx_api(mvm)) {
2160 queue = iwl_mvm_tvqm_enable_txq(mvm, bsta->sta_id,
2161 IWL_MAX_TID_COUNT,
2162 wdg_timeout);
2163 if (queue < 0) {
2164 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2165 return queue;
2166 }
2167
2168 if (vif->type == NL80211_IFTYPE_AP ||
2169 vif->type == NL80211_IFTYPE_ADHOC)
2170 mvm->probe_queue = queue;
2171 else if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
2172 mvm->p2p_dev_queue = queue;
2173 }
2174
2175 return 0;
2176 }
2177
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2178 static void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2179 struct ieee80211_vif *vif)
2180 {
2181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2182 u16 *queueptr, queue;
2183
2184 lockdep_assert_held(&mvm->mutex);
2185
2186 iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true);
2187
2188 switch (vif->type) {
2189 case NL80211_IFTYPE_AP:
2190 case NL80211_IFTYPE_ADHOC:
2191 queueptr = &mvm->probe_queue;
2192 break;
2193 case NL80211_IFTYPE_P2P_DEVICE:
2194 queueptr = &mvm->p2p_dev_queue;
2195 break;
2196 default:
2197 WARN(1, "Can't free bcast queue on vif type %d\n",
2198 vif->type);
2199 return;
2200 }
2201
2202 queue = *queueptr;
2203 iwl_mvm_disable_txq(mvm, NULL, queueptr, IWL_MAX_TID_COUNT, 0);
2204 if (iwl_mvm_has_new_tx_api(mvm))
2205 return;
2206
2207 WARN_ON(!(mvmvif->bcast_sta.tfd_queue_msk & BIT(queue)));
2208 mvmvif->bcast_sta.tfd_queue_msk &= ~BIT(queue);
2209 }
2210
2211 /* Send the FW a request to remove the station from it's internal data
2212 * 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)2213 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2214 {
2215 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2216 int ret;
2217
2218 lockdep_assert_held(&mvm->mutex);
2219
2220 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2221
2222 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id);
2223 if (ret)
2224 IWL_WARN(mvm, "Failed sending remove station\n");
2225 return ret;
2226 }
2227
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2228 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2229 {
2230 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2231
2232 lockdep_assert_held(&mvm->mutex);
2233
2234 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, 0,
2235 ieee80211_vif_type_p2p(vif),
2236 IWL_STA_GENERAL_PURPOSE);
2237 }
2238
2239 /* Allocate a new station entry for the broadcast station to the given vif,
2240 * and send it to the FW.
2241 * Note that each P2P mac should have its own broadcast station.
2242 *
2243 * @mvm: the mvm component
2244 * @vif: the interface to which the broadcast station is added
2245 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2246 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2247 {
2248 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2249 struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta;
2250 int ret;
2251
2252 lockdep_assert_held(&mvm->mutex);
2253
2254 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2255 if (ret)
2256 return ret;
2257
2258 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2259
2260 if (ret)
2261 iwl_mvm_dealloc_int_sta(mvm, bsta);
2262
2263 return ret;
2264 }
2265
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2266 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2267 {
2268 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2269
2270 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
2271 }
2272
2273 /*
2274 * Send the FW a request to remove the station from it's internal data
2275 * structures, and in addition remove it from the local data structure.
2276 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2277 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2278 {
2279 int ret;
2280
2281 lockdep_assert_held(&mvm->mutex);
2282
2283 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2284
2285 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2286
2287 return ret;
2288 }
2289
2290 /*
2291 * Allocate a new station entry for the multicast station to the given vif,
2292 * and send it to the FW.
2293 * Note that each AP/GO mac should have its own multicast station.
2294 *
2295 * @mvm: the mvm component
2296 * @vif: the interface to which the multicast station is added
2297 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2298 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2299 {
2300 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2301 struct iwl_mvm_int_sta *msta = &mvmvif->mcast_sta;
2302 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2303 const u8 *maddr = _maddr;
2304 struct iwl_trans_txq_scd_cfg cfg = {
2305 .fifo = vif->type == NL80211_IFTYPE_AP ?
2306 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2307 .sta_id = msta->sta_id,
2308 .tid = 0,
2309 .aggregate = false,
2310 .frame_limit = IWL_FRAME_LIMIT,
2311 };
2312 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2313 int ret;
2314
2315 lockdep_assert_held(&mvm->mutex);
2316
2317 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2318 vif->type != NL80211_IFTYPE_ADHOC))
2319 return -ENOTSUPP;
2320
2321 /*
2322 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2323 * invalid, so make sure we use the queue we want.
2324 * Note that this is done here as we want to avoid making DQA
2325 * changes in mac80211 layer.
2326 */
2327 if (vif->type == NL80211_IFTYPE_ADHOC)
2328 mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2329
2330 /*
2331 * While in previous FWs we had to exclude cab queue from TFD queue
2332 * mask, now it is needed as any other queue.
2333 */
2334 if (!iwl_mvm_has_new_tx_api(mvm) &&
2335 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2336 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2337 timeout);
2338 msta->tfd_queue_msk |= BIT(mvmvif->cab_queue);
2339 }
2340 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2341 mvmvif->id, mvmvif->color);
2342 if (ret)
2343 goto err;
2344
2345 /*
2346 * Enable cab queue after the ADD_STA command is sent.
2347 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2348 * command with unknown station id, and for FW that doesn't support
2349 * station API since the cab queue is not included in the
2350 * tfd_queue_mask.
2351 */
2352 if (iwl_mvm_has_new_tx_api(mvm)) {
2353 int queue = iwl_mvm_tvqm_enable_txq(mvm, msta->sta_id,
2354 0,
2355 timeout);
2356 if (queue < 0) {
2357 ret = queue;
2358 goto err;
2359 }
2360 mvmvif->cab_queue = queue;
2361 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2362 IWL_UCODE_TLV_API_STA_TYPE))
2363 iwl_mvm_enable_txq(mvm, NULL, mvmvif->cab_queue, 0, &cfg,
2364 timeout);
2365
2366 return 0;
2367 err:
2368 iwl_mvm_dealloc_int_sta(mvm, msta);
2369 return ret;
2370 }
2371
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2372 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2373 struct ieee80211_key_conf *keyconf,
2374 bool mcast)
2375 {
2376 union {
2377 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2378 struct iwl_mvm_add_sta_key_cmd cmd;
2379 } u = {};
2380 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2381 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2382 __le16 key_flags;
2383 int ret, size;
2384 u32 status;
2385
2386 /* This is a valid situation for GTK removal */
2387 if (sta_id == IWL_MVM_INVALID_STA)
2388 return 0;
2389
2390 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2391 STA_KEY_FLG_KEYID_MSK);
2392 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2393 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2394
2395 if (mcast)
2396 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2397
2398 /*
2399 * The fields assigned here are in the same location at the start
2400 * of the command, so we can do this union trick.
2401 */
2402 u.cmd.common.key_flags = key_flags;
2403 u.cmd.common.key_offset = keyconf->hw_key_idx;
2404 u.cmd.common.sta_id = sta_id;
2405
2406 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2407
2408 status = ADD_STA_SUCCESS;
2409 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2410 &status);
2411
2412 switch (status) {
2413 case ADD_STA_SUCCESS:
2414 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2415 break;
2416 default:
2417 ret = -EIO;
2418 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2419 break;
2420 }
2421
2422 return ret;
2423 }
2424
2425 /*
2426 * Send the FW a request to remove the station from it's internal data
2427 * structures, and in addition remove it from the local data structure.
2428 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2429 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2430 {
2431 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2432 int ret;
2433
2434 lockdep_assert_held(&mvm->mutex);
2435
2436 iwl_mvm_flush_sta(mvm, &mvmvif->mcast_sta, true);
2437
2438 iwl_mvm_disable_txq(mvm, NULL, &mvmvif->cab_queue, 0, 0);
2439
2440 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->mcast_sta.sta_id);
2441 if (ret)
2442 IWL_WARN(mvm, "Failed sending remove station\n");
2443
2444 return ret;
2445 }
2446
2447 #define IWL_MAX_RX_BA_SESSIONS 16
2448
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2449 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2450 {
2451 struct iwl_mvm_delba_data notif = {
2452 .baid = baid,
2453 };
2454
2455 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2456 ¬if, sizeof(notif));
2457 };
2458
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2459 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2460 struct iwl_mvm_baid_data *data)
2461 {
2462 int i;
2463
2464 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2465
2466 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2467 int j;
2468 struct iwl_mvm_reorder_buffer *reorder_buf =
2469 &data->reorder_buf[i];
2470 struct iwl_mvm_reorder_buf_entry *entries =
2471 &data->entries[i * data->entries_per_queue];
2472
2473 spin_lock_bh(&reorder_buf->lock);
2474 if (likely(!reorder_buf->num_stored)) {
2475 spin_unlock_bh(&reorder_buf->lock);
2476 continue;
2477 }
2478
2479 /*
2480 * This shouldn't happen in regular DELBA since the internal
2481 * delBA notification should trigger a release of all frames in
2482 * the reorder buffer.
2483 */
2484 WARN_ON(1);
2485
2486 for (j = 0; j < reorder_buf->buf_size; j++)
2487 __skb_queue_purge(&entries[j].e.frames);
2488 /*
2489 * Prevent timer re-arm. This prevents a very far fetched case
2490 * where we timed out on the notification. There may be prior
2491 * RX frames pending in the RX queue before the notification
2492 * that might get processed between now and the actual deletion
2493 * and we would re-arm the timer although we are deleting the
2494 * reorder buffer.
2495 */
2496 reorder_buf->removed = true;
2497 spin_unlock_bh(&reorder_buf->lock);
2498 del_timer_sync(&reorder_buf->reorder_timer);
2499 }
2500 }
2501
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2502 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2503 struct iwl_mvm_baid_data *data,
2504 u16 ssn, u16 buf_size)
2505 {
2506 int i;
2507
2508 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2509 struct iwl_mvm_reorder_buffer *reorder_buf =
2510 &data->reorder_buf[i];
2511 struct iwl_mvm_reorder_buf_entry *entries =
2512 &data->entries[i * data->entries_per_queue];
2513 int j;
2514
2515 reorder_buf->num_stored = 0;
2516 reorder_buf->head_sn = ssn;
2517 reorder_buf->buf_size = buf_size;
2518 /* rx reorder timer */
2519 timer_setup(&reorder_buf->reorder_timer,
2520 iwl_mvm_reorder_timer_expired, 0);
2521 spin_lock_init(&reorder_buf->lock);
2522 reorder_buf->mvm = mvm;
2523 reorder_buf->queue = i;
2524 reorder_buf->valid = false;
2525 for (j = 0; j < reorder_buf->buf_size; j++)
2526 __skb_queue_head_init(&entries[j].e.frames);
2527 }
2528 }
2529
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2530 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2531 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2532 {
2533 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2534 struct iwl_mvm_add_sta_cmd cmd = {};
2535 struct iwl_mvm_baid_data *baid_data = NULL;
2536 int ret;
2537 u32 status;
2538
2539 lockdep_assert_held(&mvm->mutex);
2540
2541 if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) {
2542 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2543 return -ENOSPC;
2544 }
2545
2546 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2547 u16 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2548
2549 /* sparse doesn't like the __align() so don't check */
2550 #ifndef __CHECKER__
2551 /*
2552 * The division below will be OK if either the cache line size
2553 * can be divided by the entry size (ALIGN will round up) or if
2554 * if the entry size can be divided by the cache line size, in
2555 * which case the ALIGN() will do nothing.
2556 */
2557 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2558 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2559 #endif
2560
2561 /*
2562 * Upward align the reorder buffer size to fill an entire cache
2563 * line for each queue, to avoid sharing cache lines between
2564 * different queues.
2565 */
2566 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2567
2568 /*
2569 * Allocate here so if allocation fails we can bail out early
2570 * before starting the BA session in the firmware
2571 */
2572 baid_data = kzalloc(sizeof(*baid_data) +
2573 mvm->trans->num_rx_queues *
2574 reorder_buf_size,
2575 GFP_KERNEL);
2576 if (!baid_data)
2577 return -ENOMEM;
2578
2579 /*
2580 * This division is why we need the above BUILD_BUG_ON(),
2581 * if that doesn't hold then this will not be right.
2582 */
2583 baid_data->entries_per_queue =
2584 reorder_buf_size / sizeof(baid_data->entries[0]);
2585 }
2586
2587 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2588 cmd.sta_id = mvm_sta->sta_id;
2589 cmd.add_modify = STA_MODE_MODIFY;
2590 if (start) {
2591 cmd.add_immediate_ba_tid = (u8) tid;
2592 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2593 cmd.rx_ba_window = cpu_to_le16(buf_size);
2594 } else {
2595 cmd.remove_immediate_ba_tid = (u8) tid;
2596 }
2597 cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID :
2598 STA_MODIFY_REMOVE_BA_TID;
2599
2600 status = ADD_STA_SUCCESS;
2601 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2602 iwl_mvm_add_sta_cmd_size(mvm),
2603 &cmd, &status);
2604 if (ret)
2605 goto out_free;
2606
2607 switch (status & IWL_ADD_STA_STATUS_MASK) {
2608 case ADD_STA_SUCCESS:
2609 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2610 start ? "start" : "stopp");
2611 break;
2612 case ADD_STA_IMMEDIATE_BA_FAILURE:
2613 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2614 ret = -ENOSPC;
2615 break;
2616 default:
2617 ret = -EIO;
2618 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2619 start ? "start" : "stopp", status);
2620 break;
2621 }
2622
2623 if (ret)
2624 goto out_free;
2625
2626 if (start) {
2627 u8 baid;
2628
2629 mvm->rx_ba_sessions++;
2630
2631 if (!iwl_mvm_has_new_rx_api(mvm))
2632 return 0;
2633
2634 if (WARN_ON(!(status & IWL_ADD_STA_BAID_VALID_MASK))) {
2635 ret = -EINVAL;
2636 goto out_free;
2637 }
2638 baid = (u8)((status & IWL_ADD_STA_BAID_MASK) >>
2639 IWL_ADD_STA_BAID_SHIFT);
2640 baid_data->baid = baid;
2641 baid_data->timeout = timeout;
2642 baid_data->last_rx = jiffies;
2643 baid_data->rcu_ptr = &mvm->baid_map[baid];
2644 timer_setup(&baid_data->session_timer,
2645 iwl_mvm_rx_agg_session_expired, 0);
2646 baid_data->mvm = mvm;
2647 baid_data->tid = tid;
2648 baid_data->sta_id = mvm_sta->sta_id;
2649
2650 mvm_sta->tid_to_baid[tid] = baid;
2651 if (timeout)
2652 mod_timer(&baid_data->session_timer,
2653 TU_TO_EXP_TIME(timeout * 2));
2654
2655 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
2656 /*
2657 * protect the BA data with RCU to cover a case where our
2658 * internal RX sync mechanism will timeout (not that it's
2659 * supposed to happen) and we will free the session data while
2660 * RX is being processed in parallel
2661 */
2662 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2663 mvm_sta->sta_id, tid, baid);
2664 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2665 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2666 } else {
2667 u8 baid = mvm_sta->tid_to_baid[tid];
2668
2669 if (mvm->rx_ba_sessions > 0)
2670 /* check that restart flow didn't zero the counter */
2671 mvm->rx_ba_sessions--;
2672 if (!iwl_mvm_has_new_rx_api(mvm))
2673 return 0;
2674
2675 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
2676 return -EINVAL;
2677
2678 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
2679 if (WARN_ON(!baid_data))
2680 return -EINVAL;
2681
2682 /* synchronize all rx queues so we can safely delete */
2683 iwl_mvm_free_reorder(mvm, baid_data);
2684 del_timer_sync(&baid_data->session_timer);
2685 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
2686 kfree_rcu(baid_data, rcu_head);
2687 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
2688 }
2689 return 0;
2690
2691 out_free:
2692 kfree(baid_data);
2693 return ret;
2694 }
2695
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)2696 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2697 int tid, u8 queue, bool start)
2698 {
2699 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2700 struct iwl_mvm_add_sta_cmd cmd = {};
2701 int ret;
2702 u32 status;
2703
2704 lockdep_assert_held(&mvm->mutex);
2705
2706 if (start) {
2707 mvm_sta->tfd_queue_msk |= BIT(queue);
2708 mvm_sta->tid_disable_agg &= ~BIT(tid);
2709 } else {
2710 /* In DQA-mode the queue isn't removed on agg termination */
2711 mvm_sta->tid_disable_agg |= BIT(tid);
2712 }
2713
2714 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
2715 cmd.sta_id = mvm_sta->sta_id;
2716 cmd.add_modify = STA_MODE_MODIFY;
2717 if (!iwl_mvm_has_new_tx_api(mvm))
2718 cmd.modify_mask = STA_MODIFY_QUEUES;
2719 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
2720 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
2721 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
2722
2723 status = ADD_STA_SUCCESS;
2724 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2725 iwl_mvm_add_sta_cmd_size(mvm),
2726 &cmd, &status);
2727 if (ret)
2728 return ret;
2729
2730 switch (status & IWL_ADD_STA_STATUS_MASK) {
2731 case ADD_STA_SUCCESS:
2732 break;
2733 default:
2734 ret = -EIO;
2735 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
2736 start ? "start" : "stopp", status);
2737 break;
2738 }
2739
2740 return ret;
2741 }
2742
2743 const u8 tid_to_mac80211_ac[] = {
2744 IEEE80211_AC_BE,
2745 IEEE80211_AC_BK,
2746 IEEE80211_AC_BK,
2747 IEEE80211_AC_BE,
2748 IEEE80211_AC_VI,
2749 IEEE80211_AC_VI,
2750 IEEE80211_AC_VO,
2751 IEEE80211_AC_VO,
2752 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
2753 };
2754
2755 static const u8 tid_to_ucode_ac[] = {
2756 AC_BE,
2757 AC_BK,
2758 AC_BK,
2759 AC_BE,
2760 AC_VI,
2761 AC_VI,
2762 AC_VO,
2763 AC_VO,
2764 };
2765
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)2766 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2767 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2768 {
2769 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2770 struct iwl_mvm_tid_data *tid_data;
2771 u16 normalized_ssn;
2772 u16 txq_id;
2773 int ret;
2774
2775 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
2776 return -EINVAL;
2777
2778 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
2779 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
2780 IWL_ERR(mvm,
2781 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
2782 mvmsta->tid_data[tid].state);
2783 return -ENXIO;
2784 }
2785
2786 lockdep_assert_held(&mvm->mutex);
2787
2788 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
2789 iwl_mvm_has_new_tx_api(mvm)) {
2790 u8 ac = tid_to_mac80211_ac[tid];
2791
2792 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
2793 if (ret)
2794 return ret;
2795 }
2796
2797 spin_lock_bh(&mvmsta->lock);
2798
2799 /*
2800 * Note the possible cases:
2801 * 1. An enabled TXQ - TXQ needs to become agg'ed
2802 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
2803 * it as reserved
2804 */
2805 txq_id = mvmsta->tid_data[tid].txq_id;
2806 if (txq_id == IWL_MVM_INVALID_QUEUE) {
2807 ret = iwl_mvm_find_free_queue(mvm, mvmsta->sta_id,
2808 IWL_MVM_DQA_MIN_DATA_QUEUE,
2809 IWL_MVM_DQA_MAX_DATA_QUEUE);
2810 if (ret < 0) {
2811 IWL_ERR(mvm, "Failed to allocate agg queue\n");
2812 goto out;
2813 }
2814
2815 txq_id = ret;
2816
2817 /* TXQ hasn't yet been enabled, so mark it only as reserved */
2818 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
2819 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
2820 ret = -ENXIO;
2821 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
2822 tid, IWL_MAX_HW_QUEUES - 1);
2823 goto out;
2824
2825 } else if (unlikely(mvm->queue_info[txq_id].status ==
2826 IWL_MVM_QUEUE_SHARED)) {
2827 ret = -ENXIO;
2828 IWL_DEBUG_TX_QUEUES(mvm,
2829 "Can't start tid %d agg on shared queue!\n",
2830 tid);
2831 goto out;
2832 }
2833
2834 IWL_DEBUG_TX_QUEUES(mvm,
2835 "AGG for tid %d will be on queue #%d\n",
2836 tid, txq_id);
2837
2838 tid_data = &mvmsta->tid_data[tid];
2839 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
2840 tid_data->txq_id = txq_id;
2841 *ssn = tid_data->ssn;
2842
2843 IWL_DEBUG_TX_QUEUES(mvm,
2844 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
2845 mvmsta->sta_id, tid, txq_id, tid_data->ssn,
2846 tid_data->next_reclaimed);
2847
2848 /*
2849 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
2850 * to align the wrap around of ssn so we compare relevant values.
2851 */
2852 normalized_ssn = tid_data->ssn;
2853 if (mvm->trans->trans_cfg->gen2)
2854 normalized_ssn &= 0xff;
2855
2856 if (normalized_ssn == tid_data->next_reclaimed) {
2857 tid_data->state = IWL_AGG_STARTING;
2858 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
2859 } else {
2860 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
2861 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
2862 }
2863
2864 out:
2865 spin_unlock_bh(&mvmsta->lock);
2866
2867 return ret;
2868 }
2869
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)2870 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2871 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
2872 bool amsdu)
2873 {
2874 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2875 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2876 unsigned int wdg_timeout =
2877 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
2878 int queue, ret;
2879 bool alloc_queue = true;
2880 enum iwl_mvm_queue_status queue_status;
2881 u16 ssn;
2882
2883 struct iwl_trans_txq_scd_cfg cfg = {
2884 .sta_id = mvmsta->sta_id,
2885 .tid = tid,
2886 .frame_limit = buf_size,
2887 .aggregate = true,
2888 };
2889
2890 /*
2891 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
2892 * manager, so this function should never be called in this case.
2893 */
2894 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
2895 return -EINVAL;
2896
2897 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
2898 != IWL_MAX_TID_COUNT);
2899
2900 spin_lock_bh(&mvmsta->lock);
2901 ssn = tid_data->ssn;
2902 queue = tid_data->txq_id;
2903 tid_data->state = IWL_AGG_ON;
2904 mvmsta->agg_tids |= BIT(tid);
2905 tid_data->ssn = 0xffff;
2906 tid_data->amsdu_in_ampdu_allowed = amsdu;
2907 spin_unlock_bh(&mvmsta->lock);
2908
2909 if (iwl_mvm_has_new_tx_api(mvm)) {
2910 /*
2911 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
2912 * would have failed, so if we are here there is no need to
2913 * allocate a queue.
2914 * However, if aggregation size is different than the default
2915 * size, the scheduler should be reconfigured.
2916 * We cannot do this with the new TX API, so return unsupported
2917 * for now, until it will be offloaded to firmware..
2918 * Note that if SCD default value changes - this condition
2919 * should be updated as well.
2920 */
2921 if (buf_size < IWL_FRAME_LIMIT)
2922 return -ENOTSUPP;
2923
2924 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2925 if (ret)
2926 return -EIO;
2927 goto out;
2928 }
2929
2930 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
2931
2932 queue_status = mvm->queue_info[queue].status;
2933
2934 /* Maybe there is no need to even alloc a queue... */
2935 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
2936 alloc_queue = false;
2937
2938 /*
2939 * Only reconfig the SCD for the queue if the window size has
2940 * changed from current (become smaller)
2941 */
2942 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
2943 /*
2944 * If reconfiguring an existing queue, it first must be
2945 * drained
2946 */
2947 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2948 BIT(queue));
2949 if (ret) {
2950 IWL_ERR(mvm,
2951 "Error draining queue before reconfig\n");
2952 return ret;
2953 }
2954
2955 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
2956 mvmsta->sta_id, tid,
2957 buf_size, ssn);
2958 if (ret) {
2959 IWL_ERR(mvm,
2960 "Error reconfiguring TXQ #%d\n", queue);
2961 return ret;
2962 }
2963 }
2964
2965 if (alloc_queue)
2966 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
2967 &cfg, wdg_timeout);
2968
2969 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
2970 if (queue_status != IWL_MVM_QUEUE_SHARED) {
2971 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
2972 if (ret)
2973 return -EIO;
2974 }
2975
2976 /* No need to mark as reserved */
2977 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
2978
2979 out:
2980 /*
2981 * Even though in theory the peer could have different
2982 * aggregation reorder buffer sizes for different sessions,
2983 * our ucode doesn't allow for that and has a global limit
2984 * for each station. Therefore, use the minimum of all the
2985 * aggregation sessions and our default value.
2986 */
2987 mvmsta->max_agg_bufsize =
2988 min(mvmsta->max_agg_bufsize, buf_size);
2989 mvmsta->lq_sta.rs_drv.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize;
2990
2991 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
2992 sta->addr, tid);
2993
2994 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.rs_drv.lq);
2995 }
2996
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)2997 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
2998 struct iwl_mvm_sta *mvmsta,
2999 struct iwl_mvm_tid_data *tid_data)
3000 {
3001 u16 txq_id = tid_data->txq_id;
3002
3003 lockdep_assert_held(&mvm->mutex);
3004
3005 if (iwl_mvm_has_new_tx_api(mvm))
3006 return;
3007
3008 /*
3009 * The TXQ is marked as reserved only if no traffic came through yet
3010 * This means no traffic has been sent on this TID (agg'd or not), so
3011 * we no longer have use for the queue. Since it hasn't even been
3012 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3013 * free.
3014 */
3015 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3016 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3017 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3018 }
3019 }
3020
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3021 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3022 struct ieee80211_sta *sta, u16 tid)
3023 {
3024 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3025 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3026 u16 txq_id;
3027 int err;
3028
3029 /*
3030 * If mac80211 is cleaning its state, then say that we finished since
3031 * our state has been cleared anyway.
3032 */
3033 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3034 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3035 return 0;
3036 }
3037
3038 spin_lock_bh(&mvmsta->lock);
3039
3040 txq_id = tid_data->txq_id;
3041
3042 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3043 mvmsta->sta_id, tid, txq_id, tid_data->state);
3044
3045 mvmsta->agg_tids &= ~BIT(tid);
3046
3047 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3048
3049 switch (tid_data->state) {
3050 case IWL_AGG_ON:
3051 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3052
3053 IWL_DEBUG_TX_QUEUES(mvm,
3054 "ssn = %d, next_recl = %d\n",
3055 tid_data->ssn, tid_data->next_reclaimed);
3056
3057 tid_data->ssn = 0xffff;
3058 tid_data->state = IWL_AGG_OFF;
3059 spin_unlock_bh(&mvmsta->lock);
3060
3061 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3062
3063 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3064 return 0;
3065 case IWL_AGG_STARTING:
3066 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3067 /*
3068 * The agg session has been stopped before it was set up. This
3069 * can happen when the AddBA timer times out for example.
3070 */
3071
3072 /* No barriers since we are under mutex */
3073 lockdep_assert_held(&mvm->mutex);
3074
3075 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3076 tid_data->state = IWL_AGG_OFF;
3077 err = 0;
3078 break;
3079 default:
3080 IWL_ERR(mvm,
3081 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3082 mvmsta->sta_id, tid, tid_data->state);
3083 IWL_ERR(mvm,
3084 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3085 err = -EINVAL;
3086 }
3087
3088 spin_unlock_bh(&mvmsta->lock);
3089
3090 return err;
3091 }
3092
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3093 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3094 struct ieee80211_sta *sta, u16 tid)
3095 {
3096 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3097 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3098 u16 txq_id;
3099 enum iwl_mvm_agg_state old_state;
3100
3101 /*
3102 * First set the agg state to OFF to avoid calling
3103 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3104 */
3105 spin_lock_bh(&mvmsta->lock);
3106 txq_id = tid_data->txq_id;
3107 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3108 mvmsta->sta_id, tid, txq_id, tid_data->state);
3109 old_state = tid_data->state;
3110 tid_data->state = IWL_AGG_OFF;
3111 mvmsta->agg_tids &= ~BIT(tid);
3112 spin_unlock_bh(&mvmsta->lock);
3113
3114 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3115
3116 if (old_state >= IWL_AGG_ON) {
3117 iwl_mvm_drain_sta(mvm, mvmsta, true);
3118
3119 if (iwl_mvm_has_new_tx_api(mvm)) {
3120 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->sta_id,
3121 BIT(tid)))
3122 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3123 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3124 } else {
3125 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3126 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3127 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3128 }
3129
3130 iwl_mvm_drain_sta(mvm, mvmsta, false);
3131
3132 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3133 }
3134
3135 return 0;
3136 }
3137
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3138 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3139 {
3140 int i, max = -1, max_offs = -1;
3141
3142 lockdep_assert_held(&mvm->mutex);
3143
3144 /* Pick the unused key offset with the highest 'deleted'
3145 * counter. Every time a key is deleted, all the counters
3146 * are incremented and the one that was just deleted is
3147 * reset to zero. Thus, the highest counter is the one
3148 * that was deleted longest ago. Pick that one.
3149 */
3150 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3151 if (test_bit(i, mvm->fw_key_table))
3152 continue;
3153 if (mvm->fw_key_deleted[i] > max) {
3154 max = mvm->fw_key_deleted[i];
3155 max_offs = i;
3156 }
3157 }
3158
3159 if (max_offs < 0)
3160 return STA_KEY_IDX_INVALID;
3161
3162 return max_offs;
3163 }
3164
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3165 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3166 struct ieee80211_vif *vif,
3167 struct ieee80211_sta *sta)
3168 {
3169 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3170
3171 if (sta)
3172 return iwl_mvm_sta_from_mac80211(sta);
3173
3174 /*
3175 * The device expects GTKs for station interfaces to be
3176 * installed as GTKs for the AP station. If we have no
3177 * station ID, then use AP's station ID.
3178 */
3179 if (vif->type == NL80211_IFTYPE_STATION &&
3180 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3181 u8 sta_id = mvmvif->ap_sta_id;
3182
3183 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3184 lockdep_is_held(&mvm->mutex));
3185
3186 /*
3187 * It is possible that the 'sta' parameter is NULL,
3188 * for example when a GTK is removed - the sta_id will then
3189 * be the AP ID, and no station was passed by mac80211.
3190 */
3191 if (IS_ERR_OR_NULL(sta))
3192 return NULL;
3193
3194 return iwl_mvm_sta_from_mac80211(sta);
3195 }
3196
3197 return NULL;
3198 }
3199
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3200 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3201 {
3202 int i;
3203
3204 for (i = len - 1; i >= 0; i--) {
3205 if (pn1[i] > pn2[i])
3206 return 1;
3207 if (pn1[i] < pn2[i])
3208 return -1;
3209 }
3210
3211 return 0;
3212 }
3213
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)3214 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3215 u32 sta_id,
3216 struct ieee80211_key_conf *key, bool mcast,
3217 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3218 u8 key_offset, bool mfp)
3219 {
3220 union {
3221 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3222 struct iwl_mvm_add_sta_key_cmd cmd;
3223 } u = {};
3224 __le16 key_flags;
3225 int ret;
3226 u32 status;
3227 u16 keyidx;
3228 u64 pn = 0;
3229 int i, size;
3230 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3231 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3232 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP,
3233 ADD_STA_KEY,
3234 new_api ? 2 : 1);
3235
3236 if (sta_id == IWL_MVM_INVALID_STA)
3237 return -EINVAL;
3238
3239 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3240 STA_KEY_FLG_KEYID_MSK;
3241 key_flags = cpu_to_le16(keyidx);
3242 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3243
3244 switch (key->cipher) {
3245 case WLAN_CIPHER_SUITE_TKIP:
3246 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3247 if (api_ver >= 2) {
3248 memcpy((void *)&u.cmd.tx_mic_key,
3249 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3250 IWL_MIC_KEY_SIZE);
3251
3252 memcpy((void *)&u.cmd.rx_mic_key,
3253 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3254 IWL_MIC_KEY_SIZE);
3255 pn = atomic64_read(&key->tx_pn);
3256
3257 } else {
3258 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3259 for (i = 0; i < 5; i++)
3260 u.cmd_v1.tkip_rx_ttak[i] =
3261 cpu_to_le16(tkip_p1k[i]);
3262 }
3263 memcpy(u.cmd.common.key, key->key, key->keylen);
3264 break;
3265 case WLAN_CIPHER_SUITE_CCMP:
3266 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3267 memcpy(u.cmd.common.key, key->key, key->keylen);
3268 if (api_ver >= 2)
3269 pn = atomic64_read(&key->tx_pn);
3270 break;
3271 case WLAN_CIPHER_SUITE_WEP104:
3272 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3273 fallthrough;
3274 case WLAN_CIPHER_SUITE_WEP40:
3275 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3276 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3277 break;
3278 case WLAN_CIPHER_SUITE_GCMP_256:
3279 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3280 fallthrough;
3281 case WLAN_CIPHER_SUITE_GCMP:
3282 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3283 memcpy(u.cmd.common.key, key->key, key->keylen);
3284 if (api_ver >= 2)
3285 pn = atomic64_read(&key->tx_pn);
3286 break;
3287 default:
3288 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3289 memcpy(u.cmd.common.key, key->key, key->keylen);
3290 }
3291
3292 if (mcast)
3293 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3294 if (mfp)
3295 key_flags |= cpu_to_le16(STA_KEY_MFP);
3296
3297 u.cmd.common.key_offset = key_offset;
3298 u.cmd.common.key_flags = key_flags;
3299 u.cmd.common.sta_id = sta_id;
3300
3301 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3302 i = 0;
3303 else
3304 i = -1;
3305
3306 for (; i < IEEE80211_NUM_TIDS; i++) {
3307 struct ieee80211_key_seq seq = {};
3308 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3309 int rx_pn_len = 8;
3310 /* there's a hole at 2/3 in FW format depending on version */
3311 int hole = api_ver >= 3 ? 0 : 2;
3312
3313 ieee80211_get_key_rx_seq(key, i, &seq);
3314
3315 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3316 rx_pn[0] = seq.tkip.iv16;
3317 rx_pn[1] = seq.tkip.iv16 >> 8;
3318 rx_pn[2 + hole] = seq.tkip.iv32;
3319 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3320 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3321 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3322 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3323 rx_pn = seq.hw.seq;
3324 rx_pn_len = seq.hw.seq_len;
3325 } else {
3326 rx_pn[0] = seq.ccmp.pn[0];
3327 rx_pn[1] = seq.ccmp.pn[1];
3328 rx_pn[2 + hole] = seq.ccmp.pn[2];
3329 rx_pn[3 + hole] = seq.ccmp.pn[3];
3330 rx_pn[4 + hole] = seq.ccmp.pn[4];
3331 rx_pn[5 + hole] = seq.ccmp.pn[5];
3332 }
3333
3334 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3335 rx_pn_len) > 0)
3336 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3337 rx_pn_len);
3338 }
3339
3340 if (api_ver >= 2) {
3341 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3342 size = sizeof(u.cmd);
3343 } else {
3344 size = sizeof(u.cmd_v1);
3345 }
3346
3347 status = ADD_STA_SUCCESS;
3348 if (cmd_flags & CMD_ASYNC)
3349 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3350 &u.cmd);
3351 else
3352 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3353 &u.cmd, &status);
3354
3355 switch (status) {
3356 case ADD_STA_SUCCESS:
3357 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3358 break;
3359 default:
3360 ret = -EIO;
3361 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3362 break;
3363 }
3364
3365 return ret;
3366 }
3367
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3368 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3369 struct ieee80211_key_conf *keyconf,
3370 u8 sta_id, bool remove_key)
3371 {
3372 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3373
3374 /* verify the key details match the required command's expectations */
3375 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3376 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3377 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3378 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3379 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3380 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3381 return -EINVAL;
3382
3383 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3384 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3385 return -EINVAL;
3386
3387 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3388 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3389
3390 if (remove_key) {
3391 /* This is a valid situation for IGTK */
3392 if (sta_id == IWL_MVM_INVALID_STA)
3393 return 0;
3394
3395 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3396 } else {
3397 struct ieee80211_key_seq seq;
3398 const u8 *pn;
3399
3400 switch (keyconf->cipher) {
3401 case WLAN_CIPHER_SUITE_AES_CMAC:
3402 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3403 break;
3404 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3405 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3406 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3407 break;
3408 default:
3409 return -EINVAL;
3410 }
3411
3412 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3413 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3414 igtk_cmd.ctrl_flags |=
3415 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3416 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3417 pn = seq.aes_cmac.pn;
3418 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3419 ((u64) pn[4] << 8) |
3420 ((u64) pn[3] << 16) |
3421 ((u64) pn[2] << 24) |
3422 ((u64) pn[1] << 32) |
3423 ((u64) pn[0] << 40));
3424 }
3425
3426 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3427 remove_key ? "removing" : "installing",
3428 keyconf->keyidx >= 6 ? "B" : "",
3429 keyconf->keyidx, igtk_cmd.sta_id);
3430
3431 if (!iwl_mvm_has_new_rx_api(mvm)) {
3432 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3433 .ctrl_flags = igtk_cmd.ctrl_flags,
3434 .key_id = igtk_cmd.key_id,
3435 .sta_id = igtk_cmd.sta_id,
3436 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3437 };
3438
3439 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3440 ARRAY_SIZE(igtk_cmd_v1.igtk));
3441 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3442 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3443 }
3444 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3445 sizeof(igtk_cmd), &igtk_cmd);
3446 }
3447
3448
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3449 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3450 struct ieee80211_vif *vif,
3451 struct ieee80211_sta *sta)
3452 {
3453 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3454
3455 if (sta)
3456 return sta->addr;
3457
3458 if (vif->type == NL80211_IFTYPE_STATION &&
3459 mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) {
3460 u8 sta_id = mvmvif->ap_sta_id;
3461 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3462 lockdep_is_held(&mvm->mutex));
3463 return sta->addr;
3464 }
3465
3466
3467 return NULL;
3468 }
3469
__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)3470 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3471 struct ieee80211_vif *vif,
3472 struct ieee80211_sta *sta,
3473 struct ieee80211_key_conf *keyconf,
3474 u8 key_offset,
3475 bool mcast)
3476 {
3477 const u8 *addr;
3478 struct ieee80211_key_seq seq;
3479 u16 p1k[5];
3480 u32 sta_id;
3481 bool mfp = false;
3482
3483 if (sta) {
3484 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3485
3486 sta_id = mvm_sta->sta_id;
3487 mfp = sta->mfp;
3488 } else if (vif->type == NL80211_IFTYPE_AP &&
3489 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3490 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3491
3492 sta_id = mvmvif->mcast_sta.sta_id;
3493 } else {
3494 IWL_ERR(mvm, "Failed to find station id\n");
3495 return -EINVAL;
3496 }
3497
3498 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3499 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3500 /* get phase 1 key from mac80211 */
3501 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3502 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3503
3504 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3505 seq.tkip.iv32, p1k, 0, key_offset,
3506 mfp);
3507 }
3508
3509 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3510 0, NULL, 0, key_offset, mfp);
3511 }
3512
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)3513 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3514 struct ieee80211_vif *vif,
3515 struct ieee80211_sta *sta,
3516 struct ieee80211_key_conf *keyconf,
3517 u8 key_offset)
3518 {
3519 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3520 struct iwl_mvm_sta *mvm_sta;
3521 u8 sta_id = IWL_MVM_INVALID_STA;
3522 int ret;
3523 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3524
3525 lockdep_assert_held(&mvm->mutex);
3526
3527 if (vif->type != NL80211_IFTYPE_AP ||
3528 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3529 /* Get the station id from the mvm local station table */
3530 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3531 if (!mvm_sta) {
3532 IWL_ERR(mvm, "Failed to find station\n");
3533 return -EINVAL;
3534 }
3535 sta_id = mvm_sta->sta_id;
3536
3537 /*
3538 * It is possible that the 'sta' parameter is NULL, and thus
3539 * there is a need to retrieve the sta from the local station
3540 * table.
3541 */
3542 if (!sta) {
3543 sta = rcu_dereference_protected(
3544 mvm->fw_id_to_mac_id[sta_id],
3545 lockdep_is_held(&mvm->mutex));
3546 if (IS_ERR_OR_NULL(sta)) {
3547 IWL_ERR(mvm, "Invalid station id\n");
3548 return -EINVAL;
3549 }
3550 }
3551
3552 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3553 return -EINVAL;
3554 } else {
3555 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3556
3557 sta_id = mvmvif->mcast_sta.sta_id;
3558 }
3559
3560 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3561 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3562 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3563 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3564 goto end;
3565 }
3566
3567 /* If the key_offset is not pre-assigned, we need to find a
3568 * new offset to use. In normal cases, the offset is not
3569 * pre-assigned, but during HW_RESTART we want to reuse the
3570 * same indices, so we pass them when this function is called.
3571 *
3572 * In D3 entry, we need to hardcoded the indices (because the
3573 * firmware hardcodes the PTK offset to 0). In this case, we
3574 * need to make sure we don't overwrite the hw_key_idx in the
3575 * keyconf structure, because otherwise we cannot configure
3576 * the original ones back when resuming.
3577 */
3578 if (key_offset == STA_KEY_IDX_INVALID) {
3579 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3580 if (key_offset == STA_KEY_IDX_INVALID)
3581 return -ENOSPC;
3582 keyconf->hw_key_idx = key_offset;
3583 }
3584
3585 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3586 if (ret)
3587 goto end;
3588
3589 /*
3590 * For WEP, the same key is used for multicast and unicast. Upload it
3591 * again, using the same key offset, and now pointing the other one
3592 * to the same key slot (offset).
3593 * If this fails, remove the original as well.
3594 */
3595 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3596 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3597 sta) {
3598 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3599 key_offset, !mcast);
3600 if (ret) {
3601 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3602 goto end;
3603 }
3604 }
3605
3606 __set_bit(key_offset, mvm->fw_key_table);
3607
3608 end:
3609 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3610 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3611 sta ? sta->addr : zero_addr, ret);
3612 return ret;
3613 }
3614
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3615 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3616 struct ieee80211_vif *vif,
3617 struct ieee80211_sta *sta,
3618 struct ieee80211_key_conf *keyconf)
3619 {
3620 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3621 struct iwl_mvm_sta *mvm_sta;
3622 u8 sta_id = IWL_MVM_INVALID_STA;
3623 int ret, i;
3624
3625 lockdep_assert_held(&mvm->mutex);
3626
3627 /* Get the station from the mvm local station table */
3628 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3629 if (mvm_sta)
3630 sta_id = mvm_sta->sta_id;
3631 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3632 sta_id = iwl_mvm_vif_from_mac80211(vif)->mcast_sta.sta_id;
3633
3634
3635 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3636 keyconf->keyidx, sta_id);
3637
3638 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3639 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3640 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3641 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3642
3643 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3644 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3645 keyconf->hw_key_idx);
3646 return -ENOENT;
3647 }
3648
3649 /* track which key was deleted last */
3650 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3651 if (mvm->fw_key_deleted[i] < U8_MAX)
3652 mvm->fw_key_deleted[i]++;
3653 }
3654 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
3655
3656 if (sta && !mvm_sta) {
3657 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
3658 return 0;
3659 }
3660
3661 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3662 if (ret)
3663 return ret;
3664
3665 /* delete WEP key twice to get rid of (now useless) offset */
3666 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3667 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
3668 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
3669
3670 return ret;
3671 }
3672
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)3673 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
3674 struct ieee80211_vif *vif,
3675 struct ieee80211_key_conf *keyconf,
3676 struct ieee80211_sta *sta, u32 iv32,
3677 u16 *phase1key)
3678 {
3679 struct iwl_mvm_sta *mvm_sta;
3680 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3681 bool mfp = sta ? sta->mfp : false;
3682
3683 rcu_read_lock();
3684
3685 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3686 if (WARN_ON_ONCE(!mvm_sta))
3687 goto unlock;
3688 iwl_mvm_send_sta_key(mvm, mvm_sta->sta_id, keyconf, mcast,
3689 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
3690 mfp);
3691
3692 unlock:
3693 rcu_read_unlock();
3694 }
3695
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)3696 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
3697 struct ieee80211_sta *sta)
3698 {
3699 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3700 struct iwl_mvm_add_sta_cmd cmd = {
3701 .add_modify = STA_MODE_MODIFY,
3702 .sta_id = mvmsta->sta_id,
3703 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
3704 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3705 };
3706 int ret;
3707
3708 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3709 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3710 if (ret)
3711 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3712 }
3713
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)3714 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
3715 struct ieee80211_sta *sta,
3716 enum ieee80211_frame_release_type reason,
3717 u16 cnt, u16 tids, bool more_data,
3718 bool single_sta_queue)
3719 {
3720 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3721 struct iwl_mvm_add_sta_cmd cmd = {
3722 .add_modify = STA_MODE_MODIFY,
3723 .sta_id = mvmsta->sta_id,
3724 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
3725 .sleep_tx_count = cpu_to_le16(cnt),
3726 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3727 };
3728 int tid, ret;
3729 unsigned long _tids = tids;
3730
3731 /* convert TIDs to ACs - we don't support TSPEC so that's OK
3732 * Note that this field is reserved and unused by firmware not
3733 * supporting GO uAPSD, so it's safe to always do this.
3734 */
3735 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
3736 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
3737
3738 /* If we're releasing frames from aggregation or dqa queues then check
3739 * if all the queues that we're releasing frames from, combined, have:
3740 * - more frames than the service period, in which case more_data
3741 * needs to be set
3742 * - fewer than 'cnt' frames, in which case we need to adjust the
3743 * firmware command (but do that unconditionally)
3744 */
3745 if (single_sta_queue) {
3746 int remaining = cnt;
3747 int sleep_tx_count;
3748
3749 spin_lock_bh(&mvmsta->lock);
3750 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
3751 struct iwl_mvm_tid_data *tid_data;
3752 u16 n_queued;
3753
3754 tid_data = &mvmsta->tid_data[tid];
3755
3756 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
3757 if (n_queued > remaining) {
3758 more_data = true;
3759 remaining = 0;
3760 break;
3761 }
3762 remaining -= n_queued;
3763 }
3764 sleep_tx_count = cnt - remaining;
3765 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
3766 mvmsta->sleep_tx_count = sleep_tx_count;
3767 spin_unlock_bh(&mvmsta->lock);
3768
3769 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
3770 if (WARN_ON(cnt - remaining == 0)) {
3771 ieee80211_sta_eosp(sta);
3772 return;
3773 }
3774 }
3775
3776 /* Note: this is ignored by firmware not supporting GO uAPSD */
3777 if (more_data)
3778 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
3779
3780 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
3781 mvmsta->next_status_eosp = true;
3782 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
3783 } else {
3784 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
3785 }
3786
3787 /* block the Tx queues until the FW updated the sleep Tx count */
3788 iwl_trans_block_txq_ptrs(mvm->trans, true);
3789
3790 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
3791 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
3792 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3793 if (ret)
3794 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3795 }
3796
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3797 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
3798 struct iwl_rx_cmd_buffer *rxb)
3799 {
3800 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3801 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
3802 struct ieee80211_sta *sta;
3803 u32 sta_id = le32_to_cpu(notif->sta_id);
3804
3805 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
3806 return;
3807
3808 rcu_read_lock();
3809 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
3810 if (!IS_ERR_OR_NULL(sta))
3811 ieee80211_sta_eosp(sta);
3812 rcu_read_unlock();
3813 }
3814
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)3815 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
3816 struct iwl_mvm_sta *mvmsta, bool disable)
3817 {
3818 struct iwl_mvm_add_sta_cmd cmd = {
3819 .add_modify = STA_MODE_MODIFY,
3820 .sta_id = mvmsta->sta_id,
3821 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3822 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3823 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
3824 };
3825 int ret;
3826
3827 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3828 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3829 if (ret)
3830 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3831 }
3832
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)3833 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
3834 struct ieee80211_sta *sta,
3835 bool disable)
3836 {
3837 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3838
3839 spin_lock_bh(&mvm_sta->lock);
3840
3841 if (mvm_sta->disable_tx == disable) {
3842 spin_unlock_bh(&mvm_sta->lock);
3843 return;
3844 }
3845
3846 mvm_sta->disable_tx = disable;
3847
3848 /*
3849 * If sta PS state is handled by mac80211, tell it to start/stop
3850 * queuing tx for this station.
3851 */
3852 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
3853 ieee80211_sta_block_awake(mvm->hw, sta, disable);
3854
3855 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
3856
3857 spin_unlock_bh(&mvm_sta->lock);
3858 }
3859
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)3860 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
3861 struct iwl_mvm_vif *mvmvif,
3862 struct iwl_mvm_int_sta *sta,
3863 bool disable)
3864 {
3865 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
3866 struct iwl_mvm_add_sta_cmd cmd = {
3867 .add_modify = STA_MODE_MODIFY,
3868 .sta_id = sta->sta_id,
3869 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
3870 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
3871 .mac_id_n_color = cpu_to_le32(id),
3872 };
3873 int ret;
3874
3875 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
3876 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
3877 if (ret)
3878 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
3879 }
3880
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)3881 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
3882 struct iwl_mvm_vif *mvmvif,
3883 bool disable)
3884 {
3885 struct ieee80211_sta *sta;
3886 struct iwl_mvm_sta *mvm_sta;
3887 int i;
3888
3889 rcu_read_lock();
3890
3891 /* Block/unblock all the stations of the given mvmvif */
3892 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
3893 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
3894 if (IS_ERR_OR_NULL(sta))
3895 continue;
3896
3897 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3898 if (mvm_sta->mac_id_n_color !=
3899 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
3900 continue;
3901
3902 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
3903 }
3904
3905 rcu_read_unlock();
3906
3907 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
3908 return;
3909
3910 /* Need to block/unblock also multicast station */
3911 if (mvmvif->mcast_sta.sta_id != IWL_MVM_INVALID_STA)
3912 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3913 &mvmvif->mcast_sta, disable);
3914
3915 /*
3916 * Only unblock the broadcast station (FW blocks it for immediate
3917 * quiet, not the driver)
3918 */
3919 if (!disable && mvmvif->bcast_sta.sta_id != IWL_MVM_INVALID_STA)
3920 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
3921 &mvmvif->bcast_sta, disable);
3922 }
3923
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)3924 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
3925 {
3926 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3927 struct iwl_mvm_sta *mvmsta;
3928
3929 rcu_read_lock();
3930
3931 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id);
3932
3933 if (!WARN_ON(!mvmsta))
3934 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
3935
3936 rcu_read_unlock();
3937 }
3938
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)3939 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
3940 {
3941 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3942
3943 /*
3944 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3945 * to align the wrap around of ssn so we compare relevant values.
3946 */
3947 if (mvm->trans->trans_cfg->gen2)
3948 sn &= 0xff;
3949
3950 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
3951 }
3952
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)3953 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3954 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
3955 u8 *key, u32 key_len)
3956 {
3957 int ret;
3958 u16 queue;
3959 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3960 struct ieee80211_key_conf *keyconf;
3961
3962 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
3963 NL80211_IFTYPE_UNSPECIFIED,
3964 IWL_STA_LINK);
3965 if (ret)
3966 return ret;
3967
3968 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
3969 addr, sta, &queue,
3970 IWL_MVM_TX_FIFO_BE);
3971 if (ret)
3972 goto out;
3973
3974 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL);
3975 if (!keyconf) {
3976 ret = -ENOBUFS;
3977 goto out;
3978 }
3979
3980 keyconf->cipher = cipher;
3981 memcpy(keyconf->key, key, key_len);
3982 keyconf->keylen = key_len;
3983
3984 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
3985 0, NULL, 0, 0, true);
3986 kfree(keyconf);
3987 return 0;
3988 out:
3989 iwl_mvm_dealloc_int_sta(mvm, sta);
3990 return ret;
3991 }
3992