1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2015, 2018-2023 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 int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype)
28 {
29 int sta_id;
30 u32 reserved_ids = 0;
31
32 BUILD_BUG_ON(IWL_MVM_STATION_COUNT_MAX > 32);
33 WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status));
34
35 lockdep_assert_held(&mvm->mutex);
36
37 /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */
38 if (iftype != NL80211_IFTYPE_STATION)
39 reserved_ids = BIT(0);
40
41 /* Don't take rcu_read_lock() since we are protected by mvm->mutex */
42 for (sta_id = 0; sta_id < mvm->fw->ucode_capa.num_stations; sta_id++) {
43 if (BIT(sta_id) & reserved_ids)
44 continue;
45
46 if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
47 lockdep_is_held(&mvm->mutex)))
48 return sta_id;
49 }
50 return IWL_MVM_INVALID_STA;
51 }
52
53 /* Calculate the ampdu density and max size */
iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta * link_sta,struct ieee80211_bss_conf * link_conf,u32 * _agg_size)54 u32 iwl_mvm_get_sta_ampdu_dens(struct ieee80211_link_sta *link_sta,
55 struct ieee80211_bss_conf *link_conf,
56 u32 *_agg_size)
57 {
58 u32 agg_size = 0, mpdu_dens = 0;
59
60 if (WARN_ON(!link_sta))
61 return 0;
62
63 /* Note that we always use only legacy & highest supported PPDUs, so
64 * of Draft P802.11be D.30 Table 10-12a--Fields used for calculating
65 * the maximum A-MPDU size of various PPDU types in different bands,
66 * we only need to worry about the highest supported PPDU type here.
67 */
68
69 if (link_sta->ht_cap.ht_supported) {
70 agg_size = link_sta->ht_cap.ampdu_factor;
71 mpdu_dens = link_sta->ht_cap.ampdu_density;
72 }
73
74 if (link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
75 /* overwrite HT values on 6 GHz */
76 mpdu_dens = le16_get_bits(link_sta->he_6ghz_capa.capa,
77 IEEE80211_HE_6GHZ_CAP_MIN_MPDU_START);
78 agg_size = le16_get_bits(link_sta->he_6ghz_capa.capa,
79 IEEE80211_HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP);
80 } else if (link_sta->vht_cap.vht_supported) {
81 /* if VHT supported overwrite HT value */
82 agg_size = u32_get_bits(link_sta->vht_cap.cap,
83 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK);
84 }
85
86 /* D6.0 10.12.2 A-MPDU length limit rules
87 * A STA indicates the maximum length of the A-MPDU preEOF padding
88 * that it can receive in an HE PPDU in the Maximum A-MPDU Length
89 * Exponent field in its HT Capabilities, VHT Capabilities,
90 * and HE 6 GHz Band Capabilities elements (if present) and the
91 * Maximum AMPDU Length Exponent Extension field in its HE
92 * Capabilities element
93 */
94 if (link_sta->he_cap.has_he)
95 agg_size +=
96 u8_get_bits(link_sta->he_cap.he_cap_elem.mac_cap_info[3],
97 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_MASK);
98
99 if (link_sta->eht_cap.has_eht)
100 agg_size += u8_get_bits(link_sta->eht_cap.eht_cap_elem.mac_cap_info[1],
101 IEEE80211_EHT_MAC_CAP1_MAX_AMPDU_LEN_MASK);
102
103 /* Limit to max A-MPDU supported by FW */
104 agg_size = min_t(u32, agg_size,
105 STA_FLG_MAX_AGG_SIZE_4M >> STA_FLG_MAX_AGG_SIZE_SHIFT);
106
107 *_agg_size = agg_size;
108 return mpdu_dens;
109 }
110
iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta * sta)111 u8 iwl_mvm_get_sta_uapsd_acs(struct ieee80211_sta *sta)
112 {
113 u8 uapsd_acs = 0;
114
115 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
116 uapsd_acs |= BIT(AC_BK);
117 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
118 uapsd_acs |= BIT(AC_BE);
119 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
120 uapsd_acs |= BIT(AC_VI);
121 if (sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
122 uapsd_acs |= BIT(AC_VO);
123
124 return uapsd_acs | uapsd_acs << 4;
125 }
126
127 /* 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)128 int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
129 bool update, unsigned int flags)
130 {
131 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
132 struct iwl_mvm_add_sta_cmd add_sta_cmd = {
133 .sta_id = mvm_sta->deflink.sta_id,
134 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
135 .add_modify = update ? 1 : 0,
136 .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK |
137 STA_FLG_MIMO_EN_MSK |
138 STA_FLG_RTS_MIMO_PROT),
139 .tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg),
140 };
141 int ret;
142 u32 status;
143 u32 agg_size = 0, mpdu_dens = 0;
144
145 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
146 add_sta_cmd.station_type = mvm_sta->sta_type;
147
148 if (!update || (flags & STA_MODIFY_QUEUES)) {
149 memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN);
150
151 if (!iwl_mvm_has_new_tx_api(mvm)) {
152 add_sta_cmd.tfd_queue_msk =
153 cpu_to_le32(mvm_sta->tfd_queue_msk);
154
155 if (flags & STA_MODIFY_QUEUES)
156 add_sta_cmd.modify_mask |= STA_MODIFY_QUEUES;
157 } else {
158 WARN_ON(flags & STA_MODIFY_QUEUES);
159 }
160 }
161
162 switch (sta->deflink.bandwidth) {
163 case IEEE80211_STA_RX_BW_320:
164 case IEEE80211_STA_RX_BW_160:
165 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ);
166 fallthrough;
167 case IEEE80211_STA_RX_BW_80:
168 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ);
169 fallthrough;
170 case IEEE80211_STA_RX_BW_40:
171 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ);
172 fallthrough;
173 case IEEE80211_STA_RX_BW_20:
174 if (sta->deflink.ht_cap.ht_supported)
175 add_sta_cmd.station_flags |=
176 cpu_to_le32(STA_FLG_FAT_EN_20MHZ);
177 break;
178 }
179
180 switch (sta->deflink.rx_nss) {
181 case 1:
182 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
183 break;
184 case 2:
185 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2);
186 break;
187 case 3 ... 8:
188 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3);
189 break;
190 }
191
192 switch (sta->deflink.smps_mode) {
193 case IEEE80211_SMPS_AUTOMATIC:
194 case IEEE80211_SMPS_NUM_MODES:
195 WARN_ON(1);
196 break;
197 case IEEE80211_SMPS_STATIC:
198 /* override NSS */
199 add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK);
200 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO);
201 break;
202 case IEEE80211_SMPS_DYNAMIC:
203 add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT);
204 break;
205 case IEEE80211_SMPS_OFF:
206 /* nothing */
207 break;
208 }
209
210 if (sta->deflink.ht_cap.ht_supported ||
211 mvm_sta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ)
212 add_sta_cmd.station_flags_msk |=
213 cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK |
214 STA_FLG_AGG_MPDU_DENS_MSK);
215
216 mpdu_dens = iwl_mvm_get_sta_ampdu_dens(&sta->deflink,
217 &mvm_sta->vif->bss_conf,
218 &agg_size);
219 add_sta_cmd.station_flags |=
220 cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT);
221 add_sta_cmd.station_flags |=
222 cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT);
223
224 if (mvm_sta->sta_state >= IEEE80211_STA_ASSOC)
225 add_sta_cmd.assoc_id = cpu_to_le16(sta->aid);
226
227 if (sta->wme) {
228 add_sta_cmd.modify_mask |= STA_MODIFY_UAPSD_ACS;
229 add_sta_cmd.uapsd_acs = iwl_mvm_get_sta_uapsd_acs(sta);
230 add_sta_cmd.sp_length = sta->max_sp ? sta->max_sp * 2 : 128;
231 }
232
233 status = ADD_STA_SUCCESS;
234 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
235 iwl_mvm_add_sta_cmd_size(mvm),
236 &add_sta_cmd, &status);
237 if (ret)
238 return ret;
239
240 switch (status & IWL_ADD_STA_STATUS_MASK) {
241 case ADD_STA_SUCCESS:
242 IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n");
243 break;
244 default:
245 ret = -EIO;
246 IWL_ERR(mvm, "ADD_STA failed\n");
247 break;
248 }
249
250 return ret;
251 }
252
iwl_mvm_rx_agg_session_expired(struct timer_list * t)253 static void iwl_mvm_rx_agg_session_expired(struct timer_list *t)
254 {
255 struct iwl_mvm_baid_data *data =
256 from_timer(data, t, session_timer);
257 struct iwl_mvm_baid_data __rcu **rcu_ptr = data->rcu_ptr;
258 struct iwl_mvm_baid_data *ba_data;
259 struct ieee80211_sta *sta;
260 struct iwl_mvm_sta *mvm_sta;
261 unsigned long timeout;
262 unsigned int sta_id;
263
264 rcu_read_lock();
265
266 ba_data = rcu_dereference(*rcu_ptr);
267
268 if (WARN_ON(!ba_data))
269 goto unlock;
270
271 if (!ba_data->timeout)
272 goto unlock;
273
274 timeout = ba_data->last_rx + TU_TO_JIFFIES(ba_data->timeout * 2);
275 if (time_is_after_jiffies(timeout)) {
276 mod_timer(&ba_data->session_timer, timeout);
277 goto unlock;
278 }
279
280 /* Timer expired */
281 sta_id = ffs(ba_data->sta_mask) - 1; /* don't care which one */
282 sta = rcu_dereference(ba_data->mvm->fw_id_to_mac_id[sta_id]);
283
284 /*
285 * sta should be valid unless the following happens:
286 * The firmware asserts which triggers a reconfig flow, but
287 * the reconfig fails before we set the pointer to sta into
288 * the fw_id_to_mac_id pointer table. Mac80211 can't stop
289 * A-MDPU and hence the timer continues to run. Then, the
290 * timer expires and sta is NULL.
291 */
292 if (IS_ERR_OR_NULL(sta))
293 goto unlock;
294
295 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
296 ieee80211_rx_ba_timer_expired(mvm_sta->vif,
297 sta->addr, ba_data->tid);
298 unlock:
299 rcu_read_unlock();
300 }
301
302 /* Disable aggregations for a bitmap of TIDs for a given station */
iwl_mvm_invalidate_sta_queue(struct iwl_mvm * mvm,int queue,unsigned long disable_agg_tids,bool remove_queue)303 static int iwl_mvm_invalidate_sta_queue(struct iwl_mvm *mvm, int queue,
304 unsigned long disable_agg_tids,
305 bool remove_queue)
306 {
307 struct iwl_mvm_add_sta_cmd cmd = {};
308 struct ieee80211_sta *sta;
309 struct iwl_mvm_sta *mvmsta;
310 u32 status;
311 u8 sta_id;
312
313 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
314 return -EINVAL;
315
316 sta_id = mvm->queue_info[queue].ra_sta_id;
317
318 rcu_read_lock();
319
320 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
321
322 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
323 rcu_read_unlock();
324 return -EINVAL;
325 }
326
327 mvmsta = iwl_mvm_sta_from_mac80211(sta);
328
329 mvmsta->tid_disable_agg |= disable_agg_tids;
330
331 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
332 cmd.sta_id = mvmsta->deflink.sta_id;
333 cmd.add_modify = STA_MODE_MODIFY;
334 cmd.modify_mask = STA_MODIFY_QUEUES;
335 if (disable_agg_tids)
336 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
337 if (remove_queue)
338 cmd.modify_mask |= STA_MODIFY_QUEUE_REMOVAL;
339 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
340 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
341
342 rcu_read_unlock();
343
344 /* Notify FW of queue removal from the STA queues */
345 status = ADD_STA_SUCCESS;
346 return iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
347 iwl_mvm_add_sta_cmd_size(mvm),
348 &cmd, &status);
349 }
350
iwl_mvm_disable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int sta_id,u16 * queueptr,u8 tid)351 static int iwl_mvm_disable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
352 int sta_id, u16 *queueptr, u8 tid)
353 {
354 int queue = *queueptr;
355 struct iwl_scd_txq_cfg_cmd cmd = {
356 .scd_queue = queue,
357 .action = SCD_CFG_DISABLE_QUEUE,
358 };
359 int ret;
360
361 lockdep_assert_held(&mvm->mutex);
362
363 if (iwl_mvm_has_new_tx_api(mvm)) {
364 if (mvm->sta_remove_requires_queue_remove) {
365 u32 cmd_id = WIDE_ID(DATA_PATH_GROUP,
366 SCD_QUEUE_CONFIG_CMD);
367 struct iwl_scd_queue_cfg_cmd remove_cmd = {
368 .operation = cpu_to_le32(IWL_SCD_QUEUE_REMOVE),
369 .u.remove.sta_mask = cpu_to_le32(BIT(sta_id)),
370 };
371
372 if (tid == IWL_MAX_TID_COUNT)
373 tid = IWL_MGMT_TID;
374
375 remove_cmd.u.remove.tid = cpu_to_le32(tid);
376
377 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0,
378 sizeof(remove_cmd),
379 &remove_cmd);
380 } else {
381 ret = 0;
382 }
383
384 iwl_trans_txq_free(mvm->trans, queue);
385 *queueptr = IWL_MVM_INVALID_QUEUE;
386
387 return ret;
388 }
389
390 if (WARN_ON(mvm->queue_info[queue].tid_bitmap == 0))
391 return 0;
392
393 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
394
395 cmd.action = mvm->queue_info[queue].tid_bitmap ?
396 SCD_CFG_ENABLE_QUEUE : SCD_CFG_DISABLE_QUEUE;
397 if (cmd.action == SCD_CFG_DISABLE_QUEUE)
398 mvm->queue_info[queue].status = IWL_MVM_QUEUE_FREE;
399
400 IWL_DEBUG_TX_QUEUES(mvm,
401 "Disabling TXQ #%d tids=0x%x\n",
402 queue,
403 mvm->queue_info[queue].tid_bitmap);
404
405 /* If the queue is still enabled - nothing left to do in this func */
406 if (cmd.action == SCD_CFG_ENABLE_QUEUE)
407 return 0;
408
409 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
410 cmd.tid = mvm->queue_info[queue].txq_tid;
411
412 /* Make sure queue info is correct even though we overwrite it */
413 WARN(mvm->queue_info[queue].tid_bitmap,
414 "TXQ #%d info out-of-sync - tids=0x%x\n",
415 queue, mvm->queue_info[queue].tid_bitmap);
416
417 /* If we are here - the queue is freed and we can zero out these vals */
418 mvm->queue_info[queue].tid_bitmap = 0;
419
420 if (sta) {
421 struct iwl_mvm_txq *mvmtxq =
422 iwl_mvm_txq_from_tid(sta, tid);
423
424 spin_lock_bh(&mvm->add_stream_lock);
425 list_del_init(&mvmtxq->list);
426 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
427 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
428 spin_unlock_bh(&mvm->add_stream_lock);
429 }
430
431 /* Regardless if this is a reserved TXQ for a STA - mark it as false */
432 mvm->queue_info[queue].reserved = false;
433
434 iwl_trans_txq_disable(mvm->trans, queue, false);
435 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0,
436 sizeof(struct iwl_scd_txq_cfg_cmd), &cmd);
437
438 if (ret)
439 IWL_ERR(mvm, "Failed to disable queue %d (ret=%d)\n",
440 queue, ret);
441 return ret;
442 }
443
iwl_mvm_get_queue_agg_tids(struct iwl_mvm * mvm,int queue)444 static int iwl_mvm_get_queue_agg_tids(struct iwl_mvm *mvm, int queue)
445 {
446 struct ieee80211_sta *sta;
447 struct iwl_mvm_sta *mvmsta;
448 unsigned long tid_bitmap;
449 unsigned long agg_tids = 0;
450 u8 sta_id;
451 int tid;
452
453 lockdep_assert_held(&mvm->mutex);
454
455 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
456 return -EINVAL;
457
458 sta_id = mvm->queue_info[queue].ra_sta_id;
459 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
460
461 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
462 lockdep_is_held(&mvm->mutex));
463
464 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
465 return -EINVAL;
466
467 mvmsta = iwl_mvm_sta_from_mac80211(sta);
468
469 spin_lock_bh(&mvmsta->lock);
470 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
471 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
472 agg_tids |= BIT(tid);
473 }
474 spin_unlock_bh(&mvmsta->lock);
475
476 return agg_tids;
477 }
478
479 /*
480 * Remove a queue from a station's resources.
481 * Note that this only marks as free. It DOESN'T delete a BA agreement, and
482 * doesn't disable the queue
483 */
iwl_mvm_remove_sta_queue_marking(struct iwl_mvm * mvm,int queue)484 static int iwl_mvm_remove_sta_queue_marking(struct iwl_mvm *mvm, int queue)
485 {
486 struct ieee80211_sta *sta;
487 struct iwl_mvm_sta *mvmsta;
488 unsigned long tid_bitmap;
489 unsigned long disable_agg_tids = 0;
490 u8 sta_id;
491 int tid;
492
493 lockdep_assert_held(&mvm->mutex);
494
495 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
496 return -EINVAL;
497
498 sta_id = mvm->queue_info[queue].ra_sta_id;
499 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
500
501 rcu_read_lock();
502
503 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
504
505 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
506 rcu_read_unlock();
507 return 0;
508 }
509
510 mvmsta = iwl_mvm_sta_from_mac80211(sta);
511
512 spin_lock_bh(&mvmsta->lock);
513 /* Unmap MAC queues and TIDs from this queue */
514 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
515 struct iwl_mvm_txq *mvmtxq =
516 iwl_mvm_txq_from_tid(sta, tid);
517
518 if (mvmsta->tid_data[tid].state == IWL_AGG_ON)
519 disable_agg_tids |= BIT(tid);
520 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
521
522 spin_lock_bh(&mvm->add_stream_lock);
523 list_del_init(&mvmtxq->list);
524 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
525 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
526 spin_unlock_bh(&mvm->add_stream_lock);
527 }
528
529 mvmsta->tfd_queue_msk &= ~BIT(queue); /* Don't use this queue anymore */
530 spin_unlock_bh(&mvmsta->lock);
531
532 rcu_read_unlock();
533
534 /*
535 * The TX path may have been using this TXQ_ID from the tid_data,
536 * so make sure it's no longer running so that we can safely reuse
537 * this TXQ later. We've set all the TIDs to IWL_MVM_INVALID_QUEUE
538 * above, but nothing guarantees we've stopped using them. Thus,
539 * without this, we could get to iwl_mvm_disable_txq() and remove
540 * the queue while still sending frames to it.
541 */
542 synchronize_net();
543
544 return disable_agg_tids;
545 }
546
iwl_mvm_free_inactive_queue(struct iwl_mvm * mvm,int queue,struct ieee80211_sta * old_sta,u8 new_sta_id)547 static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue,
548 struct ieee80211_sta *old_sta,
549 u8 new_sta_id)
550 {
551 struct iwl_mvm_sta *mvmsta;
552 u8 sta_id, tid;
553 unsigned long disable_agg_tids = 0;
554 bool same_sta;
555 u16 queue_tmp = queue;
556 int ret;
557
558 lockdep_assert_held(&mvm->mutex);
559
560 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
561 return -EINVAL;
562
563 sta_id = mvm->queue_info[queue].ra_sta_id;
564 tid = mvm->queue_info[queue].txq_tid;
565
566 same_sta = sta_id == new_sta_id;
567
568 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id);
569 if (WARN_ON(!mvmsta))
570 return -EINVAL;
571
572 disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue);
573 /* Disable the queue */
574 if (disable_agg_tids)
575 iwl_mvm_invalidate_sta_queue(mvm, queue,
576 disable_agg_tids, false);
577
578 ret = iwl_mvm_disable_txq(mvm, old_sta, sta_id, &queue_tmp, tid);
579 if (ret) {
580 IWL_ERR(mvm,
581 "Failed to free inactive queue %d (ret=%d)\n",
582 queue, ret);
583
584 return ret;
585 }
586
587 /* If TXQ is allocated to another STA, update removal in FW */
588 if (!same_sta)
589 iwl_mvm_invalidate_sta_queue(mvm, queue, 0, true);
590
591 return 0;
592 }
593
iwl_mvm_get_shared_queue(struct iwl_mvm * mvm,unsigned long tfd_queue_mask,u8 ac)594 static int iwl_mvm_get_shared_queue(struct iwl_mvm *mvm,
595 unsigned long tfd_queue_mask, u8 ac)
596 {
597 int queue = 0;
598 u8 ac_to_queue[IEEE80211_NUM_ACS];
599 int i;
600
601 /*
602 * This protects us against grabbing a queue that's being reconfigured
603 * by the inactivity checker.
604 */
605 lockdep_assert_held(&mvm->mutex);
606
607 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
608 return -EINVAL;
609
610 memset(&ac_to_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(ac_to_queue));
611
612 /* See what ACs the existing queues for this STA have */
613 for_each_set_bit(i, &tfd_queue_mask, IWL_MVM_DQA_MAX_DATA_QUEUE) {
614 /* Only DATA queues can be shared */
615 if (i < IWL_MVM_DQA_MIN_DATA_QUEUE &&
616 i != IWL_MVM_DQA_BSS_CLIENT_QUEUE)
617 continue;
618
619 ac_to_queue[mvm->queue_info[i].mac80211_ac] = i;
620 }
621
622 /*
623 * The queue to share is chosen only from DATA queues as follows (in
624 * descending priority):
625 * 1. An AC_BE queue
626 * 2. Same AC queue
627 * 3. Highest AC queue that is lower than new AC
628 * 4. Any existing AC (there always is at least 1 DATA queue)
629 */
630
631 /* Priority 1: An AC_BE queue */
632 if (ac_to_queue[IEEE80211_AC_BE] != IEEE80211_INVAL_HW_QUEUE)
633 queue = ac_to_queue[IEEE80211_AC_BE];
634 /* Priority 2: Same AC queue */
635 else if (ac_to_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
636 queue = ac_to_queue[ac];
637 /* Priority 3a: If new AC is VO and VI exists - use VI */
638 else if (ac == IEEE80211_AC_VO &&
639 ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
640 queue = ac_to_queue[IEEE80211_AC_VI];
641 /* Priority 3b: No BE so only AC less than the new one is BK */
642 else if (ac_to_queue[IEEE80211_AC_BK] != IEEE80211_INVAL_HW_QUEUE)
643 queue = ac_to_queue[IEEE80211_AC_BK];
644 /* Priority 4a: No BE nor BK - use VI if exists */
645 else if (ac_to_queue[IEEE80211_AC_VI] != IEEE80211_INVAL_HW_QUEUE)
646 queue = ac_to_queue[IEEE80211_AC_VI];
647 /* Priority 4b: No BE, BK nor VI - use VO if exists */
648 else if (ac_to_queue[IEEE80211_AC_VO] != IEEE80211_INVAL_HW_QUEUE)
649 queue = ac_to_queue[IEEE80211_AC_VO];
650
651 /* Make sure queue found (or not) is legal */
652 if (!iwl_mvm_is_dqa_data_queue(mvm, queue) &&
653 !iwl_mvm_is_dqa_mgmt_queue(mvm, queue) &&
654 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)) {
655 IWL_ERR(mvm, "No DATA queues available to share\n");
656 return -ENOSPC;
657 }
658
659 return queue;
660 }
661
662 /* Re-configure the SCD for a queue that has already been configured */
iwl_mvm_reconfig_scd(struct iwl_mvm * mvm,int queue,int fifo,int sta_id,int tid,int frame_limit,u16 ssn)663 static int iwl_mvm_reconfig_scd(struct iwl_mvm *mvm, int queue, int fifo,
664 int sta_id, int tid, int frame_limit, u16 ssn)
665 {
666 struct iwl_scd_txq_cfg_cmd cmd = {
667 .scd_queue = queue,
668 .action = SCD_CFG_ENABLE_QUEUE,
669 .window = frame_limit,
670 .sta_id = sta_id,
671 .ssn = cpu_to_le16(ssn),
672 .tx_fifo = fifo,
673 .aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
674 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE),
675 .tid = tid,
676 };
677 int ret;
678
679 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
680 return -EINVAL;
681
682 if (WARN(mvm->queue_info[queue].tid_bitmap == 0,
683 "Trying to reconfig unallocated queue %d\n", queue))
684 return -ENXIO;
685
686 IWL_DEBUG_TX_QUEUES(mvm, "Reconfig SCD for TXQ #%d\n", queue);
687
688 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
689 WARN_ONCE(ret, "Failed to re-configure queue %d on FIFO %d, ret=%d\n",
690 queue, fifo, ret);
691
692 return ret;
693 }
694
695 /*
696 * If a given queue has a higher AC than the TID stream that is being compared
697 * to, the queue needs to be redirected to the lower AC. This function does that
698 * in such a case, otherwise - if no redirection required - it does nothing,
699 * unless the %force param is true.
700 */
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)701 static int iwl_mvm_redirect_queue(struct iwl_mvm *mvm, int queue, int tid,
702 int ac, int ssn, unsigned int wdg_timeout,
703 bool force, struct iwl_mvm_txq *txq)
704 {
705 struct iwl_scd_txq_cfg_cmd cmd = {
706 .scd_queue = queue,
707 .action = SCD_CFG_DISABLE_QUEUE,
708 };
709 bool shared_queue;
710 int ret;
711
712 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
713 return -EINVAL;
714
715 /*
716 * If the AC is lower than current one - FIFO needs to be redirected to
717 * the lowest one of the streams in the queue. Check if this is needed
718 * here.
719 * Notice that the enum ieee80211_ac_numbers is "flipped", so BK is with
720 * value 3 and VO with value 0, so to check if ac X is lower than ac Y
721 * we need to check if the numerical value of X is LARGER than of Y.
722 */
723 if (ac <= mvm->queue_info[queue].mac80211_ac && !force) {
724 IWL_DEBUG_TX_QUEUES(mvm,
725 "No redirection needed on TXQ #%d\n",
726 queue);
727 return 0;
728 }
729
730 cmd.sta_id = mvm->queue_info[queue].ra_sta_id;
731 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[mvm->queue_info[queue].mac80211_ac];
732 cmd.tid = mvm->queue_info[queue].txq_tid;
733 shared_queue = hweight16(mvm->queue_info[queue].tid_bitmap) > 1;
734
735 IWL_DEBUG_TX_QUEUES(mvm, "Redirecting TXQ #%d to FIFO #%d\n",
736 queue, iwl_mvm_ac_to_tx_fifo[ac]);
737
738 /* Stop the queue and wait for it to empty */
739 set_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
740
741 ret = iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(queue));
742 if (ret) {
743 IWL_ERR(mvm, "Error draining queue %d before reconfig\n",
744 queue);
745 ret = -EIO;
746 goto out;
747 }
748
749 /* Before redirecting the queue we need to de-activate it */
750 iwl_trans_txq_disable(mvm->trans, queue, false);
751 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
752 if (ret)
753 IWL_ERR(mvm, "Failed SCD disable TXQ %d (ret=%d)\n", queue,
754 ret);
755
756 /* Make sure the SCD wrptr is correctly set before reconfiguring */
757 iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn, NULL, wdg_timeout);
758
759 /* Update the TID "owner" of the queue */
760 mvm->queue_info[queue].txq_tid = tid;
761
762 /* TODO: Work-around SCD bug when moving back by multiples of 0x40 */
763
764 /* Redirect to lower AC */
765 iwl_mvm_reconfig_scd(mvm, queue, iwl_mvm_ac_to_tx_fifo[ac],
766 cmd.sta_id, tid, IWL_FRAME_LIMIT, ssn);
767
768 /* Update AC marking of the queue */
769 mvm->queue_info[queue].mac80211_ac = ac;
770
771 /*
772 * Mark queue as shared in transport if shared
773 * Note this has to be done after queue enablement because enablement
774 * can also set this value, and there is no indication there to shared
775 * queues
776 */
777 if (shared_queue)
778 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
779
780 out:
781 /* Continue using the queue */
782 clear_bit(IWL_MVM_TXQ_STATE_STOP_REDIRECT, &txq->state);
783
784 return ret;
785 }
786
iwl_mvm_find_free_queue(struct iwl_mvm * mvm,u8 sta_id,u8 minq,u8 maxq)787 static int iwl_mvm_find_free_queue(struct iwl_mvm *mvm, u8 sta_id,
788 u8 minq, u8 maxq)
789 {
790 int i;
791
792 lockdep_assert_held(&mvm->mutex);
793
794 if (WARN(maxq >= mvm->trans->trans_cfg->base_params->num_of_queues,
795 "max queue %d >= num_of_queues (%d)", maxq,
796 mvm->trans->trans_cfg->base_params->num_of_queues))
797 maxq = mvm->trans->trans_cfg->base_params->num_of_queues - 1;
798
799 /* This should not be hit with new TX path */
800 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
801 return -ENOSPC;
802
803 /* Start by looking for a free queue */
804 for (i = minq; i <= maxq; i++)
805 if (mvm->queue_info[i].tid_bitmap == 0 &&
806 mvm->queue_info[i].status == IWL_MVM_QUEUE_FREE)
807 return i;
808
809 return -ENOSPC;
810 }
811
iwl_mvm_get_queue_size(struct ieee80211_sta * sta)812 static int iwl_mvm_get_queue_size(struct ieee80211_sta *sta)
813 {
814 int max_size = IWL_DEFAULT_QUEUE_SIZE;
815 unsigned int link_id;
816
817 /* this queue isn't used for traffic (cab_queue) */
818 if (!sta)
819 return IWL_MGMT_QUEUE_SIZE;
820
821 rcu_read_lock();
822
823 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
824 struct ieee80211_link_sta *link =
825 rcu_dereference(sta->link[link_id]);
826
827 if (!link)
828 continue;
829
830 /* support for 1k ba size */
831 if (link->eht_cap.has_eht &&
832 max_size < IWL_DEFAULT_QUEUE_SIZE_EHT)
833 max_size = IWL_DEFAULT_QUEUE_SIZE_EHT;
834
835 /* support for 256 ba size */
836 if (link->he_cap.has_he &&
837 max_size < IWL_DEFAULT_QUEUE_SIZE_HE)
838 max_size = IWL_DEFAULT_QUEUE_SIZE_HE;
839 }
840
841 rcu_read_unlock();
842 return max_size;
843 }
844
iwl_mvm_tvqm_enable_txq(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 sta_id,u8 tid,unsigned int timeout)845 int iwl_mvm_tvqm_enable_txq(struct iwl_mvm *mvm,
846 struct ieee80211_sta *sta,
847 u8 sta_id, u8 tid, unsigned int timeout)
848 {
849 int queue, size;
850 u32 sta_mask = 0;
851
852 if (tid == IWL_MAX_TID_COUNT) {
853 tid = IWL_MGMT_TID;
854 size = max_t(u32, IWL_MGMT_QUEUE_SIZE,
855 mvm->trans->cfg->min_txq_size);
856 } else {
857 size = iwl_mvm_get_queue_size(sta);
858 }
859
860 /* take the min with bc tbl entries allowed */
861 size = min_t(u32, size, mvm->trans->txqs.bc_tbl_size / sizeof(u16));
862
863 /* size needs to be power of 2 values for calculating read/write pointers */
864 size = rounddown_pow_of_two(size);
865
866 if (sta) {
867 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
868 unsigned int link_id;
869
870 for (link_id = 0;
871 link_id < ARRAY_SIZE(mvmsta->link);
872 link_id++) {
873 struct iwl_mvm_link_sta *link =
874 rcu_dereference_protected(mvmsta->link[link_id],
875 lockdep_is_held(&mvm->mutex));
876
877 if (!link)
878 continue;
879
880 sta_mask |= BIT(link->sta_id);
881 }
882 } else {
883 sta_mask |= BIT(sta_id);
884 }
885
886 if (!sta_mask)
887 return -EINVAL;
888
889 do {
890 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask,
891 tid, size, timeout);
892
893 if (queue < 0)
894 IWL_DEBUG_TX_QUEUES(mvm,
895 "Failed allocating TXQ of size %d for sta mask %x tid %d, ret: %d\n",
896 size, sta_mask, tid, queue);
897 size /= 2;
898 } while (queue < 0 && size >= 16);
899
900 if (queue < 0)
901 return queue;
902
903 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta mask 0x%x tid %d\n",
904 queue, sta_mask, tid);
905
906 return queue;
907 }
908
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)909 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
910 struct ieee80211_sta *sta, u8 ac,
911 int tid)
912 {
913 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
914 struct iwl_mvm_txq *mvmtxq =
915 iwl_mvm_txq_from_tid(sta, tid);
916 unsigned int wdg_timeout =
917 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
918 int queue = -1;
919
920 lockdep_assert_held(&mvm->mutex);
921
922 IWL_DEBUG_TX_QUEUES(mvm,
923 "Allocating queue for sta %d on tid %d\n",
924 mvmsta->deflink.sta_id, tid);
925 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
926 tid, wdg_timeout);
927 if (queue < 0)
928 return queue;
929
930 mvmtxq->txq_id = queue;
931 mvm->tvqm_info[queue].txq_tid = tid;
932 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id;
933
934 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
935
936 spin_lock_bh(&mvmsta->lock);
937 mvmsta->tid_data[tid].txq_id = queue;
938 spin_unlock_bh(&mvmsta->lock);
939
940 return 0;
941 }
942
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)943 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
944 struct ieee80211_sta *sta,
945 int queue, u8 sta_id, u8 tid)
946 {
947 bool enable_queue = true;
948
949 /* Make sure this TID isn't already enabled */
950 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
951 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
952 queue, tid);
953 return false;
954 }
955
956 /* Update mappings and refcounts */
957 if (mvm->queue_info[queue].tid_bitmap)
958 enable_queue = false;
959
960 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
961 mvm->queue_info[queue].ra_sta_id = sta_id;
962
963 if (enable_queue) {
964 if (tid != IWL_MAX_TID_COUNT)
965 mvm->queue_info[queue].mac80211_ac =
966 tid_to_mac80211_ac[tid];
967 else
968 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
969
970 mvm->queue_info[queue].txq_tid = tid;
971 }
972
973 if (sta) {
974 struct iwl_mvm_txq *mvmtxq =
975 iwl_mvm_txq_from_tid(sta, tid);
976
977 mvmtxq->txq_id = queue;
978 }
979
980 IWL_DEBUG_TX_QUEUES(mvm,
981 "Enabling TXQ #%d tids=0x%x\n",
982 queue, mvm->queue_info[queue].tid_bitmap);
983
984 return enable_queue;
985 }
986
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)987 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
988 int queue, u16 ssn,
989 const struct iwl_trans_txq_scd_cfg *cfg,
990 unsigned int wdg_timeout)
991 {
992 struct iwl_scd_txq_cfg_cmd cmd = {
993 .scd_queue = queue,
994 .action = SCD_CFG_ENABLE_QUEUE,
995 .window = cfg->frame_limit,
996 .sta_id = cfg->sta_id,
997 .ssn = cpu_to_le16(ssn),
998 .tx_fifo = cfg->fifo,
999 .aggregate = cfg->aggregate,
1000 .tid = cfg->tid,
1001 };
1002 bool inc_ssn;
1003
1004 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1005 return false;
1006
1007 /* Send the enabling command if we need to */
1008 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
1009 return false;
1010
1011 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
1012 NULL, wdg_timeout);
1013 if (inc_ssn)
1014 le16_add_cpu(&cmd.ssn, 1);
1015
1016 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
1017 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
1018
1019 return inc_ssn;
1020 }
1021
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)1022 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
1023 {
1024 struct iwl_scd_txq_cfg_cmd cmd = {
1025 .scd_queue = queue,
1026 .action = SCD_CFG_UPDATE_QUEUE_TID,
1027 };
1028 int tid;
1029 unsigned long tid_bitmap;
1030 int ret;
1031
1032 lockdep_assert_held(&mvm->mutex);
1033
1034 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1035 return;
1036
1037 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1038
1039 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
1040 return;
1041
1042 /* Find any TID for queue */
1043 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1044 cmd.tid = tid;
1045 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1046
1047 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
1048 if (ret) {
1049 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
1050 queue, ret);
1051 return;
1052 }
1053
1054 mvm->queue_info[queue].txq_tid = tid;
1055 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
1056 queue, tid);
1057 }
1058
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)1059 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1060 {
1061 struct ieee80211_sta *sta;
1062 struct iwl_mvm_sta *mvmsta;
1063 u8 sta_id;
1064 int tid = -1;
1065 unsigned long tid_bitmap;
1066 unsigned int wdg_timeout;
1067 int ssn;
1068 int ret = true;
1069
1070 /* queue sharing is disabled on new TX path */
1071 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1072 return;
1073
1074 lockdep_assert_held(&mvm->mutex);
1075
1076 sta_id = mvm->queue_info[queue].ra_sta_id;
1077 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1078
1079 /* Find TID for queue, and make sure it is the only one on the queue */
1080 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1081 if (tid_bitmap != BIT(tid)) {
1082 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1083 queue, tid_bitmap);
1084 return;
1085 }
1086
1087 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1088 tid);
1089
1090 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1091 lockdep_is_held(&mvm->mutex));
1092
1093 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1094 return;
1095
1096 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1097 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1098
1099 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1100
1101 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1102 tid_to_mac80211_ac[tid], ssn,
1103 wdg_timeout, true,
1104 iwl_mvm_txq_from_tid(sta, tid));
1105 if (ret) {
1106 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1107 return;
1108 }
1109
1110 /* If aggs should be turned back on - do it */
1111 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1112 struct iwl_mvm_add_sta_cmd cmd = {0};
1113
1114 mvmsta->tid_disable_agg &= ~BIT(tid);
1115
1116 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1117 cmd.sta_id = mvmsta->deflink.sta_id;
1118 cmd.add_modify = STA_MODE_MODIFY;
1119 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1120 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1121 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1122
1123 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1124 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1125 if (!ret) {
1126 IWL_DEBUG_TX_QUEUES(mvm,
1127 "TXQ #%d is now aggregated again\n",
1128 queue);
1129
1130 /* Mark queue intenally as aggregating again */
1131 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1132 }
1133 }
1134
1135 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1136 }
1137
1138 /*
1139 * Remove inactive TIDs of a given queue.
1140 * If all queue TIDs are inactive - mark the queue as inactive
1141 * If only some the queue TIDs are inactive - unmap them from the queue
1142 *
1143 * Returns %true if all TIDs were removed and the queue could be reused.
1144 */
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)1145 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1146 struct iwl_mvm_sta *mvmsta, int queue,
1147 unsigned long tid_bitmap,
1148 unsigned long *unshare_queues,
1149 unsigned long *changetid_queues)
1150 {
1151 unsigned int tid;
1152
1153 lockdep_assert_held(&mvmsta->lock);
1154 lockdep_assert_held(&mvm->mutex);
1155
1156 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1157 return false;
1158
1159 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1160 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1161 /* If some TFDs are still queued - don't mark TID as inactive */
1162 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1163 tid_bitmap &= ~BIT(tid);
1164
1165 /* Don't mark as inactive any TID that has an active BA */
1166 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1167 tid_bitmap &= ~BIT(tid);
1168 }
1169
1170 /* If all TIDs in the queue are inactive - return it can be reused */
1171 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1172 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1173 return true;
1174 }
1175
1176 /*
1177 * If we are here, this is a shared queue and not all TIDs timed-out.
1178 * Remove the ones that did.
1179 */
1180 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1181 u16 q_tid_bitmap;
1182
1183 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1184 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1185
1186 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1187
1188 /*
1189 * We need to take into account a situation in which a TXQ was
1190 * allocated to TID x, and then turned shared by adding TIDs y
1191 * and z. If TID x becomes inactive and is removed from the TXQ,
1192 * ownership must be given to one of the remaining TIDs.
1193 * This is mainly because if TID x continues - a new queue can't
1194 * be allocated for it as long as it is an owner of another TXQ.
1195 *
1196 * Mark this queue in the right bitmap, we'll send the command
1197 * to the firmware later.
1198 */
1199 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1200 set_bit(queue, changetid_queues);
1201
1202 IWL_DEBUG_TX_QUEUES(mvm,
1203 "Removing inactive TID %d from shared Q:%d\n",
1204 tid, queue);
1205 }
1206
1207 IWL_DEBUG_TX_QUEUES(mvm,
1208 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1209 mvm->queue_info[queue].tid_bitmap);
1210
1211 /*
1212 * There may be different TIDs with the same mac queues, so make
1213 * sure all TIDs have existing corresponding mac queues enabled
1214 */
1215 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1216
1217 /* If the queue is marked as shared - "unshare" it */
1218 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1219 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1220 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1221 queue);
1222 set_bit(queue, unshare_queues);
1223 }
1224
1225 return false;
1226 }
1227
1228 /*
1229 * Check for inactivity - this includes checking if any queue
1230 * can be unshared and finding one (and only one) that can be
1231 * reused.
1232 * This function is also invoked as a sort of clean-up task,
1233 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1234 *
1235 * Returns the queue number, or -ENOSPC.
1236 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1237 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1238 {
1239 unsigned long now = jiffies;
1240 unsigned long unshare_queues = 0;
1241 unsigned long changetid_queues = 0;
1242 int i, ret, free_queue = -ENOSPC;
1243 struct ieee80211_sta *queue_owner = NULL;
1244
1245 lockdep_assert_held(&mvm->mutex);
1246
1247 if (iwl_mvm_has_new_tx_api(mvm))
1248 return -ENOSPC;
1249
1250 rcu_read_lock();
1251
1252 /* we skip the CMD queue below by starting at 1 */
1253 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1254
1255 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1256 struct ieee80211_sta *sta;
1257 struct iwl_mvm_sta *mvmsta;
1258 u8 sta_id;
1259 int tid;
1260 unsigned long inactive_tid_bitmap = 0;
1261 unsigned long queue_tid_bitmap;
1262
1263 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1264 if (!queue_tid_bitmap)
1265 continue;
1266
1267 /* If TXQ isn't in active use anyway - nothing to do here... */
1268 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1269 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1270 continue;
1271
1272 /* Check to see if there are inactive TIDs on this queue */
1273 for_each_set_bit(tid, &queue_tid_bitmap,
1274 IWL_MAX_TID_COUNT + 1) {
1275 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1276 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1277 continue;
1278
1279 inactive_tid_bitmap |= BIT(tid);
1280 }
1281
1282 /* If all TIDs are active - finish check on this queue */
1283 if (!inactive_tid_bitmap)
1284 continue;
1285
1286 /*
1287 * If we are here - the queue hadn't been served recently and is
1288 * in use
1289 */
1290
1291 sta_id = mvm->queue_info[i].ra_sta_id;
1292 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1293
1294 /*
1295 * If the STA doesn't exist anymore, it isn't an error. It could
1296 * be that it was removed since getting the queues, and in this
1297 * case it should've inactivated its queues anyway.
1298 */
1299 if (IS_ERR_OR_NULL(sta))
1300 continue;
1301
1302 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1303
1304 spin_lock_bh(&mvmsta->lock);
1305 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1306 inactive_tid_bitmap,
1307 &unshare_queues,
1308 &changetid_queues);
1309 if (ret && free_queue < 0) {
1310 queue_owner = sta;
1311 free_queue = i;
1312 }
1313 /* only unlock sta lock - we still need the queue info lock */
1314 spin_unlock_bh(&mvmsta->lock);
1315 }
1316
1317
1318 /* Reconfigure queues requiring reconfiguation */
1319 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1320 iwl_mvm_unshare_queue(mvm, i);
1321 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1322 iwl_mvm_change_queue_tid(mvm, i);
1323
1324 rcu_read_unlock();
1325
1326 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1327 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1328 alloc_for_sta);
1329 if (ret)
1330 return ret;
1331 }
1332
1333 return free_queue;
1334 }
1335
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1336 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1337 struct ieee80211_sta *sta, u8 ac, int tid)
1338 {
1339 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1340 struct iwl_trans_txq_scd_cfg cfg = {
1341 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1342 .sta_id = mvmsta->deflink.sta_id,
1343 .tid = tid,
1344 .frame_limit = IWL_FRAME_LIMIT,
1345 };
1346 unsigned int wdg_timeout =
1347 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1348 int queue = -1;
1349 u16 queue_tmp;
1350 unsigned long disable_agg_tids = 0;
1351 enum iwl_mvm_agg_state queue_state;
1352 bool shared_queue = false, inc_ssn;
1353 int ssn;
1354 unsigned long tfd_queue_mask;
1355 int ret;
1356
1357 lockdep_assert_held(&mvm->mutex);
1358
1359 if (iwl_mvm_has_new_tx_api(mvm))
1360 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1361
1362 spin_lock_bh(&mvmsta->lock);
1363 tfd_queue_mask = mvmsta->tfd_queue_msk;
1364 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1365 spin_unlock_bh(&mvmsta->lock);
1366
1367 if (tid == IWL_MAX_TID_COUNT) {
1368 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1369 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1370 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1371 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1372 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1373 queue);
1374
1375 /* If no such queue is found, we'll use a DATA queue instead */
1376 }
1377
1378 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1379 (mvm->queue_info[mvmsta->reserved_queue].status ==
1380 IWL_MVM_QUEUE_RESERVED)) {
1381 queue = mvmsta->reserved_queue;
1382 mvm->queue_info[queue].reserved = true;
1383 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1384 }
1385
1386 if (queue < 0)
1387 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1388 IWL_MVM_DQA_MIN_DATA_QUEUE,
1389 IWL_MVM_DQA_MAX_DATA_QUEUE);
1390 if (queue < 0) {
1391 /* try harder - perhaps kill an inactive queue */
1392 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1393 }
1394
1395 /* No free queue - we'll have to share */
1396 if (queue <= 0) {
1397 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1398 if (queue > 0) {
1399 shared_queue = true;
1400 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1401 }
1402 }
1403
1404 /*
1405 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1406 * to make sure no one else takes it.
1407 * This will allow avoiding re-acquiring the lock at the end of the
1408 * configuration. On error we'll mark it back as free.
1409 */
1410 if (queue > 0 && !shared_queue)
1411 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1412
1413 /* This shouldn't happen - out of queues */
1414 if (WARN_ON(queue <= 0)) {
1415 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1416 tid, cfg.sta_id);
1417 return queue;
1418 }
1419
1420 /*
1421 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1422 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1423 * as aggregatable.
1424 * Mark all DATA queues as allowing to be aggregated at some point
1425 */
1426 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1427 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1428
1429 IWL_DEBUG_TX_QUEUES(mvm,
1430 "Allocating %squeue #%d to sta %d on tid %d\n",
1431 shared_queue ? "shared " : "", queue,
1432 mvmsta->deflink.sta_id, tid);
1433
1434 if (shared_queue) {
1435 /* Disable any open aggs on this queue */
1436 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1437
1438 if (disable_agg_tids) {
1439 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1440 queue);
1441 iwl_mvm_invalidate_sta_queue(mvm, queue,
1442 disable_agg_tids, false);
1443 }
1444 }
1445
1446 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1447
1448 /*
1449 * Mark queue as shared in transport if shared
1450 * Note this has to be done after queue enablement because enablement
1451 * can also set this value, and there is no indication there to shared
1452 * queues
1453 */
1454 if (shared_queue)
1455 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1456
1457 spin_lock_bh(&mvmsta->lock);
1458 /*
1459 * This looks racy, but it is not. We have only one packet for
1460 * this ra/tid in our Tx path since we stop the Qdisc when we
1461 * need to allocate a new TFD queue.
1462 */
1463 if (inc_ssn) {
1464 mvmsta->tid_data[tid].seq_number += 0x10;
1465 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1466 }
1467 mvmsta->tid_data[tid].txq_id = queue;
1468 mvmsta->tfd_queue_msk |= BIT(queue);
1469 queue_state = mvmsta->tid_data[tid].state;
1470
1471 if (mvmsta->reserved_queue == queue)
1472 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1473 spin_unlock_bh(&mvmsta->lock);
1474
1475 if (!shared_queue) {
1476 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1477 if (ret)
1478 goto out_err;
1479
1480 /* If we need to re-enable aggregations... */
1481 if (queue_state == IWL_AGG_ON) {
1482 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1483 if (ret)
1484 goto out_err;
1485 }
1486 } else {
1487 /* Redirect queue, if needed */
1488 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1489 wdg_timeout, false,
1490 iwl_mvm_txq_from_tid(sta, tid));
1491 if (ret)
1492 goto out_err;
1493 }
1494
1495 return 0;
1496
1497 out_err:
1498 queue_tmp = queue;
1499 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid);
1500
1501 return ret;
1502 }
1503
iwl_mvm_sta_ensure_queue(struct iwl_mvm * mvm,struct ieee80211_txq * txq)1504 int iwl_mvm_sta_ensure_queue(struct iwl_mvm *mvm,
1505 struct ieee80211_txq *txq)
1506 {
1507 struct iwl_mvm_txq *mvmtxq = iwl_mvm_txq_from_mac80211(txq);
1508 int ret = -EINVAL;
1509
1510 lockdep_assert_held(&mvm->mutex);
1511
1512 if (likely(test_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state)) ||
1513 !txq->sta) {
1514 return 0;
1515 }
1516
1517 if (!iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, txq->tid)) {
1518 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1519 ret = 0;
1520 }
1521
1522 local_bh_disable();
1523 spin_lock(&mvm->add_stream_lock);
1524 if (!list_empty(&mvmtxq->list))
1525 list_del_init(&mvmtxq->list);
1526 spin_unlock(&mvm->add_stream_lock);
1527 local_bh_enable();
1528
1529 return ret;
1530 }
1531
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1532 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1533 {
1534 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1535 add_stream_wk);
1536
1537 mutex_lock(&mvm->mutex);
1538
1539 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1540
1541 while (!list_empty(&mvm->add_stream_txqs)) {
1542 struct iwl_mvm_txq *mvmtxq;
1543 struct ieee80211_txq *txq;
1544 u8 tid;
1545
1546 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1547 struct iwl_mvm_txq, list);
1548
1549 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1550 drv_priv);
1551 tid = txq->tid;
1552 if (tid == IEEE80211_NUM_TIDS)
1553 tid = IWL_MAX_TID_COUNT;
1554
1555 /*
1556 * We can't really do much here, but if this fails we can't
1557 * transmit anyway - so just don't transmit the frame etc.
1558 * and let them back up ... we've tried our best to allocate
1559 * a queue in the function itself.
1560 */
1561 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1562 spin_lock_bh(&mvm->add_stream_lock);
1563 list_del_init(&mvmtxq->list);
1564 spin_unlock_bh(&mvm->add_stream_lock);
1565 continue;
1566 }
1567
1568 /* now we're ready, any remaining races/concurrency will be
1569 * handled in iwl_mvm_mac_itxq_xmit()
1570 */
1571 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1572
1573 local_bh_disable();
1574 spin_lock(&mvm->add_stream_lock);
1575 list_del_init(&mvmtxq->list);
1576 spin_unlock(&mvm->add_stream_lock);
1577
1578 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1579 local_bh_enable();
1580 }
1581
1582 mutex_unlock(&mvm->mutex);
1583 }
1584
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1585 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1586 struct ieee80211_sta *sta,
1587 enum nl80211_iftype vif_type)
1588 {
1589 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1590 int queue;
1591
1592 /* queue reserving is disabled on new TX path */
1593 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1594 return 0;
1595
1596 /* run the general cleanup/unsharing of queues */
1597 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1598
1599 /* Make sure we have free resources for this STA */
1600 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1601 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1602 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1603 IWL_MVM_QUEUE_FREE))
1604 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1605 else
1606 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1607 IWL_MVM_DQA_MIN_DATA_QUEUE,
1608 IWL_MVM_DQA_MAX_DATA_QUEUE);
1609 if (queue < 0) {
1610 /* try again - this time kick out a queue if needed */
1611 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1612 if (queue < 0) {
1613 IWL_ERR(mvm, "No available queues for new station\n");
1614 return -ENOSPC;
1615 }
1616 }
1617 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1618
1619 mvmsta->reserved_queue = queue;
1620
1621 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1622 queue, mvmsta->deflink.sta_id);
1623
1624 return 0;
1625 }
1626
1627 /*
1628 * In DQA mode, after a HW restart the queues should be allocated as before, in
1629 * order to avoid race conditions when there are shared queues. This function
1630 * does the re-mapping and queue allocation.
1631 *
1632 * Note that re-enabling aggregations isn't done in this function.
1633 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1634 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1635 struct ieee80211_sta *sta)
1636 {
1637 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1638 unsigned int wdg =
1639 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1640 int i;
1641 struct iwl_trans_txq_scd_cfg cfg = {
1642 .sta_id = mvm_sta->deflink.sta_id,
1643 .frame_limit = IWL_FRAME_LIMIT,
1644 };
1645
1646 /* Make sure reserved queue is still marked as such (if allocated) */
1647 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1648 mvm->queue_info[mvm_sta->reserved_queue].status =
1649 IWL_MVM_QUEUE_RESERVED;
1650
1651 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1652 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1653 int txq_id = tid_data->txq_id;
1654 int ac;
1655
1656 if (txq_id == IWL_MVM_INVALID_QUEUE)
1657 continue;
1658
1659 ac = tid_to_mac80211_ac[i];
1660
1661 if (iwl_mvm_has_new_tx_api(mvm)) {
1662 IWL_DEBUG_TX_QUEUES(mvm,
1663 "Re-mapping sta %d tid %d\n",
1664 mvm_sta->deflink.sta_id, i);
1665 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta,
1666 mvm_sta->deflink.sta_id,
1667 i, wdg);
1668 /*
1669 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1670 * to try again later, we have no other good way of
1671 * failing here
1672 */
1673 if (txq_id < 0)
1674 txq_id = IWL_MVM_INVALID_QUEUE;
1675 tid_data->txq_id = txq_id;
1676
1677 /*
1678 * Since we don't set the seq number after reset, and HW
1679 * sets it now, FW reset will cause the seq num to start
1680 * at 0 again, so driver will need to update it
1681 * internally as well, so it keeps in sync with real val
1682 */
1683 tid_data->seq_number = 0;
1684 } else {
1685 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1686
1687 cfg.tid = i;
1688 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1689 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1690 txq_id ==
1691 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1692
1693 IWL_DEBUG_TX_QUEUES(mvm,
1694 "Re-mapping sta %d tid %d to queue %d\n",
1695 mvm_sta->deflink.sta_id, i,
1696 txq_id);
1697
1698 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1699 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1700 }
1701 }
1702 }
1703
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1704 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1705 struct iwl_mvm_int_sta *sta,
1706 const u8 *addr,
1707 u16 mac_id, u16 color)
1708 {
1709 struct iwl_mvm_add_sta_cmd cmd;
1710 int ret;
1711 u32 status = ADD_STA_SUCCESS;
1712
1713 lockdep_assert_held(&mvm->mutex);
1714
1715 memset(&cmd, 0, sizeof(cmd));
1716 cmd.sta_id = sta->sta_id;
1717
1718 if (iwl_mvm_has_new_station_api(mvm->fw) &&
1719 sta->type == IWL_STA_AUX_ACTIVITY)
1720 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1721 else
1722 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1723 color));
1724
1725 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1726 cmd.station_type = sta->type;
1727
1728 if (!iwl_mvm_has_new_tx_api(mvm))
1729 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1730 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1731
1732 if (addr)
1733 memcpy(cmd.addr, addr, ETH_ALEN);
1734
1735 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1736 iwl_mvm_add_sta_cmd_size(mvm),
1737 &cmd, &status);
1738 if (ret)
1739 return ret;
1740
1741 switch (status & IWL_ADD_STA_STATUS_MASK) {
1742 case ADD_STA_SUCCESS:
1743 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1744 return 0;
1745 default:
1746 ret = -EIO;
1747 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1748 status);
1749 break;
1750 }
1751 return ret;
1752 }
1753
1754 /* Initialize driver data of a new sta */
iwl_mvm_sta_init(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,int sta_id,u8 sta_type)1755 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1756 struct ieee80211_sta *sta, int sta_id, u8 sta_type)
1757 {
1758 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1759 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1760 struct iwl_mvm_rxq_dup_data *dup_data;
1761 int i, ret = 0;
1762
1763 lockdep_assert_held(&mvm->mutex);
1764
1765 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1766 mvmvif->color);
1767 mvm_sta->vif = vif;
1768
1769 /* for MLD sta_id(s) should be allocated for each link before calling
1770 * this function
1771 */
1772 if (!mvm->mld_api_is_used) {
1773 if (WARN_ON(sta_id == IWL_MVM_INVALID_STA))
1774 return -EINVAL;
1775
1776 mvm_sta->deflink.sta_id = sta_id;
1777 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink);
1778
1779 if (!mvm->trans->trans_cfg->gen2)
1780 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1781 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1782 else
1783 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1784 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1785 }
1786
1787 mvm_sta->tt_tx_protection = false;
1788 mvm_sta->sta_type = sta_type;
1789
1790 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1791
1792 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1793 /*
1794 * Mark all queues for this STA as unallocated and defer TX
1795 * frames until the queue is allocated
1796 */
1797 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1798 }
1799
1800 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1801 struct iwl_mvm_txq *mvmtxq =
1802 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1803
1804 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1805 INIT_LIST_HEAD(&mvmtxq->list);
1806 atomic_set(&mvmtxq->tx_request, 0);
1807 }
1808
1809 if (iwl_mvm_has_new_rx_api(mvm)) {
1810 int q;
1811
1812 dup_data = kcalloc(mvm->trans->num_rx_queues,
1813 sizeof(*dup_data), GFP_KERNEL);
1814 if (!dup_data)
1815 return -ENOMEM;
1816 /*
1817 * Initialize all the last_seq values to 0xffff which can never
1818 * compare equal to the frame's seq_ctrl in the check in
1819 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1820 * number and fragmented packets don't reach that function.
1821 *
1822 * This thus allows receiving a packet with seqno 0 and the
1823 * retry bit set as the very first packet on a new TID.
1824 */
1825 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1826 memset(dup_data[q].last_seq, 0xff,
1827 sizeof(dup_data[q].last_seq));
1828 mvm_sta->dup_data = dup_data;
1829 }
1830
1831 if (!iwl_mvm_has_new_tx_api(mvm)) {
1832 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1833 ieee80211_vif_type_p2p(vif));
1834 if (ret)
1835 return ret;
1836 }
1837
1838 /*
1839 * if rs is registered with mac80211, then "add station" will be handled
1840 * via the corresponding ops, otherwise need to notify rate scaling here
1841 */
1842 if (iwl_mvm_has_tlc_offload(mvm))
1843 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1844 else
1845 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock);
1846
1847 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1848
1849 return 0;
1850 }
1851
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1852 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1853 struct ieee80211_vif *vif,
1854 struct ieee80211_sta *sta)
1855 {
1856 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1857 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1858 int ret, sta_id;
1859 bool sta_update = false;
1860 unsigned int sta_flags = 0;
1861
1862 lockdep_assert_held(&mvm->mutex);
1863
1864 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1865 sta_id = iwl_mvm_find_free_sta_id(mvm,
1866 ieee80211_vif_type_p2p(vif));
1867 else
1868 sta_id = mvm_sta->deflink.sta_id;
1869
1870 if (sta_id == IWL_MVM_INVALID_STA)
1871 return -ENOSPC;
1872
1873 spin_lock_init(&mvm_sta->lock);
1874
1875 /* if this is a HW restart re-alloc existing queues */
1876 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1877 struct iwl_mvm_int_sta tmp_sta = {
1878 .sta_id = sta_id,
1879 .type = mvm_sta->sta_type,
1880 };
1881
1882 /* First add an empty station since allocating
1883 * a queue requires a valid station
1884 */
1885 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1886 mvmvif->id, mvmvif->color);
1887 if (ret)
1888 goto err;
1889
1890 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1891 sta_update = true;
1892 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1893 goto update_fw;
1894 }
1895
1896 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id,
1897 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK);
1898 if (ret)
1899 goto err;
1900
1901 update_fw:
1902 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1903 if (ret)
1904 goto err;
1905
1906 if (vif->type == NL80211_IFTYPE_STATION) {
1907 if (!sta->tdls) {
1908 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA);
1909 mvmvif->deflink.ap_sta_id = sta_id;
1910 } else {
1911 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_MVM_INVALID_STA);
1912 }
1913 }
1914
1915 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1916
1917 return 0;
1918
1919 err:
1920 return ret;
1921 }
1922
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1923 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1924 bool drain)
1925 {
1926 struct iwl_mvm_add_sta_cmd cmd = {};
1927 int ret;
1928 u32 status;
1929
1930 lockdep_assert_held(&mvm->mutex);
1931
1932 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1933 cmd.sta_id = mvmsta->deflink.sta_id;
1934 cmd.add_modify = STA_MODE_MODIFY;
1935 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1936 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1937
1938 status = ADD_STA_SUCCESS;
1939 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1940 iwl_mvm_add_sta_cmd_size(mvm),
1941 &cmd, &status);
1942 if (ret)
1943 return ret;
1944
1945 switch (status & IWL_ADD_STA_STATUS_MASK) {
1946 case ADD_STA_SUCCESS:
1947 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1948 mvmsta->deflink.sta_id);
1949 break;
1950 default:
1951 ret = -EIO;
1952 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1953 mvmsta->deflink.sta_id);
1954 break;
1955 }
1956
1957 return ret;
1958 }
1959
1960 /*
1961 * Remove a station from the FW table. Before sending the command to remove
1962 * the station validate that the station is indeed known to the driver (sanity
1963 * only).
1964 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1965 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1966 {
1967 struct ieee80211_sta *sta;
1968 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1969 .sta_id = sta_id,
1970 };
1971 int ret;
1972
1973 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1974 lockdep_is_held(&mvm->mutex));
1975
1976 /* Note: internal stations are marked as error values */
1977 if (!sta) {
1978 IWL_ERR(mvm, "Invalid station id\n");
1979 return -EINVAL;
1980 }
1981
1982 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1983 sizeof(rm_sta_cmd), &rm_sta_cmd);
1984 if (ret) {
1985 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1986 return ret;
1987 }
1988
1989 return 0;
1990 }
1991
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1992 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1993 struct ieee80211_vif *vif,
1994 struct ieee80211_sta *sta)
1995 {
1996 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1997 int i;
1998
1999 lockdep_assert_held(&mvm->mutex);
2000
2001 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2002 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
2003 continue;
2004
2005 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id,
2006 &mvm_sta->tid_data[i].txq_id, i);
2007 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
2008 }
2009
2010 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
2011 struct iwl_mvm_txq *mvmtxq =
2012 iwl_mvm_txq_from_mac80211(sta->txq[i]);
2013
2014 spin_lock_bh(&mvm->add_stream_lock);
2015 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
2016 list_del_init(&mvmtxq->list);
2017 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
2018 spin_unlock_bh(&mvm->add_stream_lock);
2019 }
2020 }
2021
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)2022 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
2023 struct iwl_mvm_sta *mvm_sta)
2024 {
2025 int i;
2026
2027 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2028 u16 txq_id;
2029 int ret;
2030
2031 spin_lock_bh(&mvm_sta->lock);
2032 txq_id = mvm_sta->tid_data[i].txq_id;
2033 spin_unlock_bh(&mvm_sta->lock);
2034
2035 if (txq_id == IWL_MVM_INVALID_QUEUE)
2036 continue;
2037
2038 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2039 if (ret)
2040 return ret;
2041 }
2042
2043 return 0;
2044 }
2045
2046 /* Execute the common part for both MLD and non-MLD modes.
2047 * Returns if we're done with removing the station, either
2048 * with error or success
2049 */
iwl_mvm_sta_del(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_link_sta * link_sta,int * ret)2050 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2051 struct ieee80211_sta *sta,
2052 struct ieee80211_link_sta *link_sta, int *ret)
2053 {
2054 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2055 struct iwl_mvm_vif_link_info *mvm_link =
2056 mvmvif->link[link_sta->link_id];
2057 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2058 struct iwl_mvm_link_sta *mvm_link_sta;
2059 u8 sta_id;
2060
2061 lockdep_assert_held(&mvm->mutex);
2062
2063 mvm_link_sta =
2064 rcu_dereference_protected(mvm_sta->link[link_sta->link_id],
2065 lockdep_is_held(&mvm->mutex));
2066 sta_id = mvm_link_sta->sta_id;
2067
2068 /* If there is a TXQ still marked as reserved - free it */
2069 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
2070 u8 reserved_txq = mvm_sta->reserved_queue;
2071 enum iwl_mvm_queue_status *status;
2072
2073 /*
2074 * If no traffic has gone through the reserved TXQ - it
2075 * is still marked as IWL_MVM_QUEUE_RESERVED, and
2076 * should be manually marked as free again
2077 */
2078 status = &mvm->queue_info[reserved_txq].status;
2079 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2080 (*status != IWL_MVM_QUEUE_FREE),
2081 "sta_id %d reserved txq %d status %d",
2082 sta_id, reserved_txq, *status)) {
2083 *ret = -EINVAL;
2084 return true;
2085 }
2086
2087 *status = IWL_MVM_QUEUE_FREE;
2088 }
2089
2090 if (vif->type == NL80211_IFTYPE_STATION &&
2091 mvm_link->ap_sta_id == sta_id) {
2092 /* if associated - we can't remove the AP STA now */
2093 if (vif->cfg.assoc)
2094 return true;
2095
2096 /* first remove remaining keys */
2097 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0);
2098
2099 /* unassoc - go ahead - remove the AP STA now */
2100 mvm_link->ap_sta_id = IWL_MVM_INVALID_STA;
2101 }
2102
2103 /*
2104 * This shouldn't happen - the TDLS channel switch should be canceled
2105 * before the STA is removed.
2106 */
2107 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2108 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
2109 cancel_delayed_work(&mvm->tdls_cs.dwork);
2110 }
2111
2112 return false;
2113 }
2114
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2115 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
2116 struct ieee80211_vif *vif,
2117 struct ieee80211_sta *sta)
2118 {
2119 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2120 int ret;
2121
2122 lockdep_assert_held(&mvm->mutex);
2123
2124 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
2125 if (ret)
2126 return ret;
2127
2128 /* flush its queues here since we are freeing mvm_sta */
2129 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
2130 mvm_sta->tfd_queue_msk);
2131 if (ret)
2132 return ret;
2133 if (iwl_mvm_has_new_tx_api(mvm)) {
2134 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
2135 } else {
2136 u32 q_mask = mvm_sta->tfd_queue_msk;
2137
2138 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2139 q_mask);
2140 }
2141 if (ret)
2142 return ret;
2143
2144 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
2145
2146 iwl_mvm_disable_sta_queues(mvm, vif, sta);
2147
2148 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret))
2149 return ret;
2150
2151 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
2152 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
2153
2154 return ret;
2155 }
2156
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)2157 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2158 struct ieee80211_vif *vif,
2159 u8 sta_id)
2160 {
2161 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2162
2163 lockdep_assert_held(&mvm->mutex);
2164
2165 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2166 return ret;
2167 }
2168
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,u8 type)2169 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2170 struct iwl_mvm_int_sta *sta,
2171 u32 qmask, enum nl80211_iftype iftype,
2172 u8 type)
2173 {
2174 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2175 sta->sta_id == IWL_MVM_INVALID_STA) {
2176 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2177 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2178 return -ENOSPC;
2179 }
2180
2181 sta->tfd_queue_msk = qmask;
2182 sta->type = type;
2183
2184 /* put a non-NULL value so iterating over the stations won't stop */
2185 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2186 return 0;
2187 }
2188
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)2189 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2190 {
2191 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2192 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2193 sta->sta_id = IWL_MVM_INVALID_STA;
2194 }
2195
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)2196 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2197 u8 sta_id, u8 fifo)
2198 {
2199 unsigned int wdg_timeout =
2200 mvm->trans->trans_cfg->base_params->wd_timeout;
2201 struct iwl_trans_txq_scd_cfg cfg = {
2202 .fifo = fifo,
2203 .sta_id = sta_id,
2204 .tid = IWL_MAX_TID_COUNT,
2205 .aggregate = false,
2206 .frame_limit = IWL_FRAME_LIMIT,
2207 };
2208
2209 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2210
2211 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2212 }
2213
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2214 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2215 {
2216 unsigned int wdg_timeout =
2217 mvm->trans->trans_cfg->base_params->wd_timeout;
2218
2219 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2220
2221 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT,
2222 wdg_timeout);
2223 }
2224
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)2225 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2226 int maccolor, u8 *addr,
2227 struct iwl_mvm_int_sta *sta,
2228 u16 *queue, int fifo)
2229 {
2230 int ret;
2231
2232 /* Map queue to fifo - needs to happen before adding station */
2233 if (!iwl_mvm_has_new_tx_api(mvm))
2234 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2235
2236 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2237 if (ret) {
2238 if (!iwl_mvm_has_new_tx_api(mvm))
2239 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2240 IWL_MAX_TID_COUNT);
2241 return ret;
2242 }
2243
2244 /*
2245 * For 22000 firmware and on we cannot add queue to a station unknown
2246 * to firmware so enable queue here - after the station was added
2247 */
2248 if (iwl_mvm_has_new_tx_api(mvm)) {
2249 int txq;
2250
2251 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2252 if (txq < 0) {
2253 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2254 return txq;
2255 }
2256
2257 *queue = txq;
2258 }
2259
2260 return 0;
2261 }
2262
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2263 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2264 {
2265 int ret;
2266 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
2267 BIT(mvm->aux_queue);
2268
2269 lockdep_assert_held(&mvm->mutex);
2270
2271 /* Allocate aux station and assign to it the aux queue */
2272 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
2273 NL80211_IFTYPE_UNSPECIFIED,
2274 IWL_STA_AUX_ACTIVITY);
2275 if (ret)
2276 return ret;
2277
2278 /*
2279 * In CDB NICs we need to specify which lmac to use for aux activity
2280 * using the mac_id argument place to send lmac_id to the function
2281 */
2282 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2283 &mvm->aux_sta, &mvm->aux_queue,
2284 IWL_MVM_TX_FIFO_MCAST);
2285 if (ret) {
2286 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2287 return ret;
2288 }
2289
2290 return 0;
2291 }
2292
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2293 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2294 {
2295 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2296
2297 lockdep_assert_held(&mvm->mutex);
2298
2299 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2300 NULL, &mvm->snif_sta,
2301 &mvm->snif_queue,
2302 IWL_MVM_TX_FIFO_BE);
2303 }
2304
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2305 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2306 {
2307 int ret;
2308
2309 lockdep_assert_held(&mvm->mutex);
2310
2311 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2312 return -EINVAL;
2313
2314 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2315 &mvm->snif_queue, IWL_MAX_TID_COUNT);
2316 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2317 if (ret)
2318 IWL_WARN(mvm, "Failed sending remove station\n");
2319
2320 return ret;
2321 }
2322
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2323 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2324 {
2325 int ret;
2326
2327 lockdep_assert_held(&mvm->mutex);
2328
2329 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2330 return -EINVAL;
2331
2332 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2333 &mvm->aux_queue, IWL_MAX_TID_COUNT);
2334 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2335 if (ret)
2336 IWL_WARN(mvm, "Failed sending remove station\n");
2337 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2338
2339 return ret;
2340 }
2341
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2342 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2343 {
2344 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2345 }
2346
2347 /*
2348 * Send the add station command for the vif's broadcast station.
2349 * Assumes that the station was already allocated.
2350 *
2351 * @mvm: the mvm component
2352 * @vif: the interface to which the broadcast station is added
2353 * @bsta: the broadcast station to add.
2354 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2355 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2356 {
2357 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2358 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2359 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2360 const u8 *baddr = _baddr;
2361 int queue;
2362 int ret;
2363 unsigned int wdg_timeout =
2364 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2365 struct iwl_trans_txq_scd_cfg cfg = {
2366 .fifo = IWL_MVM_TX_FIFO_VO,
2367 .sta_id = mvmvif->deflink.bcast_sta.sta_id,
2368 .tid = IWL_MAX_TID_COUNT,
2369 .aggregate = false,
2370 .frame_limit = IWL_FRAME_LIMIT,
2371 };
2372
2373 lockdep_assert_held(&mvm->mutex);
2374
2375 if (!iwl_mvm_has_new_tx_api(mvm)) {
2376 if (vif->type == NL80211_IFTYPE_AP ||
2377 vif->type == NL80211_IFTYPE_ADHOC) {
2378 queue = mvm->probe_queue;
2379 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2380 queue = mvm->p2p_dev_queue;
2381 } else {
2382 WARN(1, "Missing required TXQ for adding bcast STA\n");
2383 return -EINVAL;
2384 }
2385
2386 bsta->tfd_queue_msk |= BIT(queue);
2387
2388 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2389 }
2390
2391 if (vif->type == NL80211_IFTYPE_ADHOC)
2392 baddr = vif->bss_conf.bssid;
2393
2394 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2395 return -ENOSPC;
2396
2397 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2398 mvmvif->id, mvmvif->color);
2399 if (ret)
2400 return ret;
2401
2402 /*
2403 * For 22000 firmware and on we cannot add queue to a station unknown
2404 * to firmware so enable queue here - after the station was added
2405 */
2406 if (iwl_mvm_has_new_tx_api(mvm)) {
2407 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id,
2408 IWL_MAX_TID_COUNT,
2409 wdg_timeout);
2410 if (queue < 0) {
2411 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2412 return queue;
2413 }
2414
2415 if (vif->type == NL80211_IFTYPE_AP ||
2416 vif->type == NL80211_IFTYPE_ADHOC) {
2417 /* for queue management */
2418 mvm->probe_queue = queue;
2419 /* for use in TX */
2420 mvmvif->deflink.mgmt_queue = queue;
2421 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2422 mvm->p2p_dev_queue = queue;
2423 }
2424 } else if (vif->type == NL80211_IFTYPE_AP ||
2425 vif->type == NL80211_IFTYPE_ADHOC) {
2426 /* set it for use in TX */
2427 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2428 }
2429
2430 return 0;
2431 }
2432
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2433 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2434 struct ieee80211_vif *vif)
2435 {
2436 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2437 u16 *queueptr, queue;
2438
2439 lockdep_assert_held(&mvm->mutex);
2440
2441 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
2442 mvmvif->deflink.bcast_sta.tfd_queue_msk);
2443
2444 switch (vif->type) {
2445 case NL80211_IFTYPE_AP:
2446 case NL80211_IFTYPE_ADHOC:
2447 queueptr = &mvm->probe_queue;
2448 break;
2449 case NL80211_IFTYPE_P2P_DEVICE:
2450 queueptr = &mvm->p2p_dev_queue;
2451 break;
2452 default:
2453 WARN(1, "Can't free bcast queue on vif type %d\n",
2454 vif->type);
2455 return;
2456 }
2457
2458 queue = *queueptr;
2459 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id,
2460 queueptr, IWL_MAX_TID_COUNT);
2461
2462 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC)
2463 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2464
2465 if (iwl_mvm_has_new_tx_api(mvm))
2466 return;
2467
2468 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue)));
2469 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue);
2470 }
2471
2472 /* Send the FW a request to remove the station from it's internal data
2473 * 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)2474 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2475 {
2476 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2477 int ret;
2478
2479 lockdep_assert_held(&mvm->mutex);
2480
2481 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2482
2483 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id);
2484 if (ret)
2485 IWL_WARN(mvm, "Failed sending remove station\n");
2486 return ret;
2487 }
2488
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2489 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2490 {
2491 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2492
2493 lockdep_assert_held(&mvm->mutex);
2494
2495 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0,
2496 ieee80211_vif_type_p2p(vif),
2497 IWL_STA_GENERAL_PURPOSE);
2498 }
2499
2500 /* Allocate a new station entry for the broadcast station to the given vif,
2501 * and send it to the FW.
2502 * Note that each P2P mac should have its own broadcast station.
2503 *
2504 * @mvm: the mvm component
2505 * @vif: the interface to which the broadcast station is added
2506 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2507 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2508 {
2509 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2510 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2511 int ret;
2512
2513 lockdep_assert_held(&mvm->mutex);
2514
2515 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2516 if (ret)
2517 return ret;
2518
2519 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2520
2521 if (ret)
2522 iwl_mvm_dealloc_int_sta(mvm, bsta);
2523
2524 return ret;
2525 }
2526
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2527 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2528 {
2529 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2530
2531 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta);
2532 }
2533
2534 /*
2535 * Send the FW a request to remove the station from it's internal data
2536 * structures, and in addition remove it from the local data structure.
2537 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2538 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2539 {
2540 int ret;
2541
2542 lockdep_assert_held(&mvm->mutex);
2543
2544 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2545
2546 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2547
2548 return ret;
2549 }
2550
2551 /*
2552 * Allocate a new station entry for the multicast station to the given vif,
2553 * and send it to the FW.
2554 * Note that each AP/GO mac should have its own multicast station.
2555 *
2556 * @mvm: the mvm component
2557 * @vif: the interface to which the multicast station is added
2558 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2559 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2560 {
2561 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2562 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta;
2563 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2564 const u8 *maddr = _maddr;
2565 struct iwl_trans_txq_scd_cfg cfg = {
2566 .fifo = vif->type == NL80211_IFTYPE_AP ?
2567 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2568 .sta_id = msta->sta_id,
2569 .tid = 0,
2570 .aggregate = false,
2571 .frame_limit = IWL_FRAME_LIMIT,
2572 };
2573 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2574 int ret;
2575
2576 lockdep_assert_held(&mvm->mutex);
2577
2578 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2579 vif->type != NL80211_IFTYPE_ADHOC))
2580 return -ENOTSUPP;
2581
2582 /*
2583 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2584 * invalid, so make sure we use the queue we want.
2585 * Note that this is done here as we want to avoid making DQA
2586 * changes in mac80211 layer.
2587 */
2588 if (vif->type == NL80211_IFTYPE_ADHOC)
2589 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2590
2591 /*
2592 * While in previous FWs we had to exclude cab queue from TFD queue
2593 * mask, now it is needed as any other queue.
2594 */
2595 if (!iwl_mvm_has_new_tx_api(mvm) &&
2596 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2597 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2598 &cfg,
2599 timeout);
2600 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue);
2601 }
2602 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2603 mvmvif->id, mvmvif->color);
2604 if (ret)
2605 goto err;
2606
2607 /*
2608 * Enable cab queue after the ADD_STA command is sent.
2609 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2610 * command with unknown station id, and for FW that doesn't support
2611 * station API since the cab queue is not included in the
2612 * tfd_queue_mask.
2613 */
2614 if (iwl_mvm_has_new_tx_api(mvm)) {
2615 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id,
2616 0, timeout);
2617 if (queue < 0) {
2618 ret = queue;
2619 goto err;
2620 }
2621 mvmvif->deflink.cab_queue = queue;
2622 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2623 IWL_UCODE_TLV_API_STA_TYPE))
2624 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2625 &cfg,
2626 timeout);
2627
2628 return 0;
2629 err:
2630 iwl_mvm_dealloc_int_sta(mvm, msta);
2631 return ret;
2632 }
2633
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2634 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2635 struct ieee80211_key_conf *keyconf,
2636 bool mcast)
2637 {
2638 union {
2639 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2640 struct iwl_mvm_add_sta_key_cmd cmd;
2641 } u = {};
2642 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2643 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2644 __le16 key_flags;
2645 int ret, size;
2646 u32 status;
2647
2648 /* This is a valid situation for GTK removal */
2649 if (sta_id == IWL_MVM_INVALID_STA)
2650 return 0;
2651
2652 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2653 STA_KEY_FLG_KEYID_MSK);
2654 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2655 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2656
2657 if (mcast)
2658 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2659
2660 /*
2661 * The fields assigned here are in the same location at the start
2662 * of the command, so we can do this union trick.
2663 */
2664 u.cmd.common.key_flags = key_flags;
2665 u.cmd.common.key_offset = keyconf->hw_key_idx;
2666 u.cmd.common.sta_id = sta_id;
2667
2668 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2669
2670 status = ADD_STA_SUCCESS;
2671 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2672 &status);
2673
2674 switch (status) {
2675 case ADD_STA_SUCCESS:
2676 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2677 break;
2678 default:
2679 ret = -EIO;
2680 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2681 break;
2682 }
2683
2684 return ret;
2685 }
2686
2687 /*
2688 * Send the FW a request to remove the station from it's internal data
2689 * structures, and in addition remove it from the local data structure.
2690 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2691 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2692 {
2693 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2694 int ret;
2695
2696 lockdep_assert_held(&mvm->mutex);
2697
2698 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id,
2699 mvmvif->deflink.mcast_sta.tfd_queue_msk);
2700
2701 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id,
2702 &mvmvif->deflink.cab_queue, 0);
2703
2704 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id);
2705 if (ret)
2706 IWL_WARN(mvm, "Failed sending remove station\n");
2707
2708 return ret;
2709 }
2710
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2711 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2712 {
2713 struct iwl_mvm_delba_data notif = {
2714 .baid = baid,
2715 };
2716
2717 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2718 ¬if, sizeof(notif));
2719 };
2720
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2721 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2722 struct iwl_mvm_baid_data *data)
2723 {
2724 int i;
2725
2726 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2727
2728 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2729 int j;
2730 struct iwl_mvm_reorder_buffer *reorder_buf =
2731 &data->reorder_buf[i];
2732 struct iwl_mvm_reorder_buf_entry *entries =
2733 &data->entries[i * data->entries_per_queue];
2734
2735 spin_lock_bh(&reorder_buf->lock);
2736 if (likely(!reorder_buf->num_stored)) {
2737 spin_unlock_bh(&reorder_buf->lock);
2738 continue;
2739 }
2740
2741 /*
2742 * This shouldn't happen in regular DELBA since the internal
2743 * delBA notification should trigger a release of all frames in
2744 * the reorder buffer.
2745 */
2746 WARN_ON(1);
2747
2748 for (j = 0; j < reorder_buf->buf_size; j++)
2749 __skb_queue_purge(&entries[j].e.frames);
2750 /*
2751 * Prevent timer re-arm. This prevents a very far fetched case
2752 * where we timed out on the notification. There may be prior
2753 * RX frames pending in the RX queue before the notification
2754 * that might get processed between now and the actual deletion
2755 * and we would re-arm the timer although we are deleting the
2756 * reorder buffer.
2757 */
2758 reorder_buf->removed = true;
2759 spin_unlock_bh(&reorder_buf->lock);
2760 del_timer_sync(&reorder_buf->reorder_timer);
2761 }
2762 }
2763
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2764 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2765 struct iwl_mvm_baid_data *data,
2766 u16 ssn, u16 buf_size)
2767 {
2768 int i;
2769
2770 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2771 struct iwl_mvm_reorder_buffer *reorder_buf =
2772 &data->reorder_buf[i];
2773 struct iwl_mvm_reorder_buf_entry *entries =
2774 &data->entries[i * data->entries_per_queue];
2775 int j;
2776
2777 reorder_buf->num_stored = 0;
2778 reorder_buf->head_sn = ssn;
2779 reorder_buf->buf_size = buf_size;
2780 /* rx reorder timer */
2781 timer_setup(&reorder_buf->reorder_timer,
2782 iwl_mvm_reorder_timer_expired, 0);
2783 spin_lock_init(&reorder_buf->lock);
2784 reorder_buf->mvm = mvm;
2785 reorder_buf->queue = i;
2786 reorder_buf->valid = false;
2787 for (j = 0; j < reorder_buf->buf_size; j++)
2788 __skb_queue_head_init(&entries[j].e.frames);
2789 }
2790 }
2791
iwl_mvm_fw_baid_op_sta(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size)2792 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2793 struct ieee80211_sta *sta,
2794 bool start, int tid, u16 ssn,
2795 u16 buf_size)
2796 {
2797 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2798 struct iwl_mvm_add_sta_cmd cmd = {
2799 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2800 .sta_id = mvm_sta->deflink.sta_id,
2801 .add_modify = STA_MODE_MODIFY,
2802 };
2803 u32 status;
2804 int ret;
2805
2806 if (start) {
2807 cmd.add_immediate_ba_tid = tid;
2808 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2809 cmd.rx_ba_window = cpu_to_le16(buf_size);
2810 cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2811 } else {
2812 cmd.remove_immediate_ba_tid = tid;
2813 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2814 }
2815
2816 status = ADD_STA_SUCCESS;
2817 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2818 iwl_mvm_add_sta_cmd_size(mvm),
2819 &cmd, &status);
2820 if (ret)
2821 return ret;
2822
2823 switch (status & IWL_ADD_STA_STATUS_MASK) {
2824 case ADD_STA_SUCCESS:
2825 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2826 start ? "start" : "stopp");
2827 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2828 !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2829 return -EINVAL;
2830 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2831 case ADD_STA_IMMEDIATE_BA_FAILURE:
2832 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2833 return -ENOSPC;
2834 default:
2835 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2836 start ? "start" : "stopp", status);
2837 return -EIO;
2838 }
2839 }
2840
iwl_mvm_fw_baid_op_cmd(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2841 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2842 struct ieee80211_sta *sta,
2843 bool start, int tid, u16 ssn,
2844 u16 buf_size, int baid)
2845 {
2846 struct iwl_rx_baid_cfg_cmd cmd = {
2847 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2848 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2849 };
2850 struct iwl_host_cmd hcmd = {
2851 .id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD),
2852 .flags = CMD_SEND_IN_RFKILL,
2853 .len[0] = sizeof(cmd),
2854 .data[0] = &cmd,
2855 };
2856 int ret;
2857
2858 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2859
2860 if (start) {
2861 cmd.alloc.sta_id_mask =
2862 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2863 cmd.alloc.tid = tid;
2864 cmd.alloc.ssn = cpu_to_le16(ssn);
2865 cmd.alloc.win_size = cpu_to_le16(buf_size);
2866 baid = -EIO;
2867 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 1) == 1) {
2868 cmd.remove_v1.baid = cpu_to_le32(baid);
2869 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2870 } else {
2871 cmd.remove.sta_id_mask =
2872 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2873 cmd.remove.tid = cpu_to_le32(tid);
2874 }
2875
2876 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &baid);
2877 if (ret)
2878 return ret;
2879
2880 if (!start) {
2881 /* ignore firmware baid on remove */
2882 baid = 0;
2883 }
2884
2885 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2886 start ? "start" : "stopp");
2887
2888 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2889 return -EINVAL;
2890
2891 return baid;
2892 }
2893
iwl_mvm_fw_baid_op(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2894 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2895 bool start, int tid, u16 ssn, u16 buf_size,
2896 int baid)
2897 {
2898 if (fw_has_capa(&mvm->fw->ucode_capa,
2899 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2900 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start,
2901 tid, ssn, buf_size, baid);
2902
2903 return iwl_mvm_fw_baid_op_sta(mvm, sta, start,
2904 tid, ssn, buf_size);
2905 }
2906
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2907 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2908 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2909 {
2910 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2911 struct iwl_mvm_baid_data *baid_data = NULL;
2912 int ret, baid;
2913 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2914 IWL_MAX_BAID_OLD;
2915
2916 lockdep_assert_held(&mvm->mutex);
2917
2918 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2919 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2920 return -ENOSPC;
2921 }
2922
2923 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2924 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2925
2926 /* sparse doesn't like the __align() so don't check */
2927 #ifndef __CHECKER__
2928 /*
2929 * The division below will be OK if either the cache line size
2930 * can be divided by the entry size (ALIGN will round up) or if
2931 * if the entry size can be divided by the cache line size, in
2932 * which case the ALIGN() will do nothing.
2933 */
2934 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2935 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2936 #endif
2937
2938 /*
2939 * Upward align the reorder buffer size to fill an entire cache
2940 * line for each queue, to avoid sharing cache lines between
2941 * different queues.
2942 */
2943 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2944
2945 /*
2946 * Allocate here so if allocation fails we can bail out early
2947 * before starting the BA session in the firmware
2948 */
2949 baid_data = kzalloc(sizeof(*baid_data) +
2950 mvm->trans->num_rx_queues *
2951 reorder_buf_size,
2952 GFP_KERNEL);
2953 if (!baid_data)
2954 return -ENOMEM;
2955
2956 /*
2957 * This division is why we need the above BUILD_BUG_ON(),
2958 * if that doesn't hold then this will not be right.
2959 */
2960 baid_data->entries_per_queue =
2961 reorder_buf_size / sizeof(baid_data->entries[0]);
2962 }
2963
2964 if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2965 baid = mvm_sta->tid_to_baid[tid];
2966 } else {
2967 /* we don't really need it in this case */
2968 baid = -1;
2969 }
2970
2971 /* Don't send command to remove (start=0) BAID during restart */
2972 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2973 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size,
2974 baid);
2975
2976 if (baid < 0) {
2977 ret = baid;
2978 goto out_free;
2979 }
2980
2981 if (start) {
2982 mvm->rx_ba_sessions++;
2983
2984 if (!iwl_mvm_has_new_rx_api(mvm))
2985 return 0;
2986
2987 baid_data->baid = baid;
2988 baid_data->timeout = timeout;
2989 baid_data->last_rx = jiffies;
2990 baid_data->rcu_ptr = &mvm->baid_map[baid];
2991 timer_setup(&baid_data->session_timer,
2992 iwl_mvm_rx_agg_session_expired, 0);
2993 baid_data->mvm = mvm;
2994 baid_data->tid = tid;
2995 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
2996
2997 mvm_sta->tid_to_baid[tid] = baid;
2998 if (timeout)
2999 mod_timer(&baid_data->session_timer,
3000 TU_TO_EXP_TIME(timeout * 2));
3001
3002 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
3003 /*
3004 * protect the BA data with RCU to cover a case where our
3005 * internal RX sync mechanism will timeout (not that it's
3006 * supposed to happen) and we will free the session data while
3007 * RX is being processed in parallel
3008 */
3009 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
3010 mvm_sta->deflink.sta_id, tid, baid);
3011 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
3012 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
3013 } else {
3014 baid = mvm_sta->tid_to_baid[tid];
3015
3016 if (mvm->rx_ba_sessions > 0)
3017 /* check that restart flow didn't zero the counter */
3018 mvm->rx_ba_sessions--;
3019 if (!iwl_mvm_has_new_rx_api(mvm))
3020 return 0;
3021
3022 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
3023 return -EINVAL;
3024
3025 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
3026 if (WARN_ON(!baid_data))
3027 return -EINVAL;
3028
3029 /* synchronize all rx queues so we can safely delete */
3030 iwl_mvm_free_reorder(mvm, baid_data);
3031 timer_shutdown_sync(&baid_data->session_timer);
3032 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
3033 kfree_rcu(baid_data, rcu_head);
3034 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
3035
3036 /*
3037 * After we've deleted it, do another queue sync
3038 * so if an IWL_MVM_RXQ_NSSN_SYNC was concurrently
3039 * running it won't find a new session in the old
3040 * BAID. It can find the NULL pointer for the BAID,
3041 * but we must not have it find a different session.
3042 */
3043 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_EMPTY,
3044 true, NULL, 0);
3045 }
3046 return 0;
3047
3048 out_free:
3049 kfree(baid_data);
3050 return ret;
3051 }
3052
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)3053 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3054 int tid, u8 queue, bool start)
3055 {
3056 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3057 struct iwl_mvm_add_sta_cmd cmd = {};
3058 int ret;
3059 u32 status;
3060
3061 lockdep_assert_held(&mvm->mutex);
3062
3063 if (start) {
3064 mvm_sta->tfd_queue_msk |= BIT(queue);
3065 mvm_sta->tid_disable_agg &= ~BIT(tid);
3066 } else {
3067 /* In DQA-mode the queue isn't removed on agg termination */
3068 mvm_sta->tid_disable_agg |= BIT(tid);
3069 }
3070
3071 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
3072 cmd.sta_id = mvm_sta->deflink.sta_id;
3073 cmd.add_modify = STA_MODE_MODIFY;
3074 if (!iwl_mvm_has_new_tx_api(mvm))
3075 cmd.modify_mask = STA_MODIFY_QUEUES;
3076 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
3077 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
3078 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
3079
3080 status = ADD_STA_SUCCESS;
3081 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
3082 iwl_mvm_add_sta_cmd_size(mvm),
3083 &cmd, &status);
3084 if (ret)
3085 return ret;
3086
3087 switch (status & IWL_ADD_STA_STATUS_MASK) {
3088 case ADD_STA_SUCCESS:
3089 break;
3090 default:
3091 ret = -EIO;
3092 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
3093 start ? "start" : "stopp", status);
3094 break;
3095 }
3096
3097 return ret;
3098 }
3099
3100 const u8 tid_to_mac80211_ac[] = {
3101 IEEE80211_AC_BE,
3102 IEEE80211_AC_BK,
3103 IEEE80211_AC_BK,
3104 IEEE80211_AC_BE,
3105 IEEE80211_AC_VI,
3106 IEEE80211_AC_VI,
3107 IEEE80211_AC_VO,
3108 IEEE80211_AC_VO,
3109 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
3110 };
3111
3112 static const u8 tid_to_ucode_ac[] = {
3113 AC_BE,
3114 AC_BK,
3115 AC_BK,
3116 AC_BE,
3117 AC_VI,
3118 AC_VI,
3119 AC_VO,
3120 AC_VO,
3121 };
3122
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)3123 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3124 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3125 {
3126 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3127 struct iwl_mvm_tid_data *tid_data;
3128 u16 normalized_ssn;
3129 u16 txq_id;
3130 int ret;
3131
3132 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
3133 return -EINVAL;
3134
3135 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
3136 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
3137 IWL_ERR(mvm,
3138 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
3139 mvmsta->tid_data[tid].state);
3140 return -ENXIO;
3141 }
3142
3143 lockdep_assert_held(&mvm->mutex);
3144
3145 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
3146 iwl_mvm_has_new_tx_api(mvm)) {
3147 u8 ac = tid_to_mac80211_ac[tid];
3148
3149 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
3150 if (ret)
3151 return ret;
3152 }
3153
3154 spin_lock_bh(&mvmsta->lock);
3155
3156 /*
3157 * Note the possible cases:
3158 * 1. An enabled TXQ - TXQ needs to become agg'ed
3159 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
3160 * it as reserved
3161 */
3162 txq_id = mvmsta->tid_data[tid].txq_id;
3163 if (txq_id == IWL_MVM_INVALID_QUEUE) {
3164 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
3165 IWL_MVM_DQA_MIN_DATA_QUEUE,
3166 IWL_MVM_DQA_MAX_DATA_QUEUE);
3167 if (ret < 0) {
3168 IWL_ERR(mvm, "Failed to allocate agg queue\n");
3169 goto out;
3170 }
3171
3172 txq_id = ret;
3173
3174 /* TXQ hasn't yet been enabled, so mark it only as reserved */
3175 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
3176 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
3177 ret = -ENXIO;
3178 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
3179 tid, IWL_MAX_HW_QUEUES - 1);
3180 goto out;
3181
3182 } else if (unlikely(mvm->queue_info[txq_id].status ==
3183 IWL_MVM_QUEUE_SHARED)) {
3184 ret = -ENXIO;
3185 IWL_DEBUG_TX_QUEUES(mvm,
3186 "Can't start tid %d agg on shared queue!\n",
3187 tid);
3188 goto out;
3189 }
3190
3191 IWL_DEBUG_TX_QUEUES(mvm,
3192 "AGG for tid %d will be on queue #%d\n",
3193 tid, txq_id);
3194
3195 tid_data = &mvmsta->tid_data[tid];
3196 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3197 tid_data->txq_id = txq_id;
3198 *ssn = tid_data->ssn;
3199
3200 IWL_DEBUG_TX_QUEUES(mvm,
3201 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3202 mvmsta->deflink.sta_id, tid, txq_id,
3203 tid_data->ssn,
3204 tid_data->next_reclaimed);
3205
3206 /*
3207 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3208 * to align the wrap around of ssn so we compare relevant values.
3209 */
3210 normalized_ssn = tid_data->ssn;
3211 if (mvm->trans->trans_cfg->gen2)
3212 normalized_ssn &= 0xff;
3213
3214 if (normalized_ssn == tid_data->next_reclaimed) {
3215 tid_data->state = IWL_AGG_STARTING;
3216 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3217 } else {
3218 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3219 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3220 }
3221
3222 out:
3223 spin_unlock_bh(&mvmsta->lock);
3224
3225 return ret;
3226 }
3227
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)3228 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3229 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3230 bool amsdu)
3231 {
3232 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3233 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3234 unsigned int wdg_timeout =
3235 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
3236 int queue, ret;
3237 bool alloc_queue = true;
3238 enum iwl_mvm_queue_status queue_status;
3239 u16 ssn;
3240
3241 struct iwl_trans_txq_scd_cfg cfg = {
3242 .sta_id = mvmsta->deflink.sta_id,
3243 .tid = tid,
3244 .frame_limit = buf_size,
3245 .aggregate = true,
3246 };
3247
3248 /*
3249 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3250 * manager, so this function should never be called in this case.
3251 */
3252 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3253 return -EINVAL;
3254
3255 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3256 != IWL_MAX_TID_COUNT);
3257
3258 spin_lock_bh(&mvmsta->lock);
3259 ssn = tid_data->ssn;
3260 queue = tid_data->txq_id;
3261 tid_data->state = IWL_AGG_ON;
3262 mvmsta->agg_tids |= BIT(tid);
3263 tid_data->ssn = 0xffff;
3264 tid_data->amsdu_in_ampdu_allowed = amsdu;
3265 spin_unlock_bh(&mvmsta->lock);
3266
3267 if (iwl_mvm_has_new_tx_api(mvm)) {
3268 /*
3269 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3270 * would have failed, so if we are here there is no need to
3271 * allocate a queue.
3272 * However, if aggregation size is different than the default
3273 * size, the scheduler should be reconfigured.
3274 * We cannot do this with the new TX API, so return unsupported
3275 * for now, until it will be offloaded to firmware..
3276 * Note that if SCD default value changes - this condition
3277 * should be updated as well.
3278 */
3279 if (buf_size < IWL_FRAME_LIMIT)
3280 return -ENOTSUPP;
3281
3282 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3283 if (ret)
3284 return -EIO;
3285 goto out;
3286 }
3287
3288 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3289
3290 queue_status = mvm->queue_info[queue].status;
3291
3292 /* Maybe there is no need to even alloc a queue... */
3293 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3294 alloc_queue = false;
3295
3296 /*
3297 * Only reconfig the SCD for the queue if the window size has
3298 * changed from current (become smaller)
3299 */
3300 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3301 /*
3302 * If reconfiguring an existing queue, it first must be
3303 * drained
3304 */
3305 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3306 BIT(queue));
3307 if (ret) {
3308 IWL_ERR(mvm,
3309 "Error draining queue before reconfig\n");
3310 return ret;
3311 }
3312
3313 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3314 mvmsta->deflink.sta_id, tid,
3315 buf_size, ssn);
3316 if (ret) {
3317 IWL_ERR(mvm,
3318 "Error reconfiguring TXQ #%d\n", queue);
3319 return ret;
3320 }
3321 }
3322
3323 if (alloc_queue)
3324 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3325 &cfg, wdg_timeout);
3326
3327 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3328 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3329 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3330 if (ret)
3331 return -EIO;
3332 }
3333
3334 /* No need to mark as reserved */
3335 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3336
3337 out:
3338 /*
3339 * Even though in theory the peer could have different
3340 * aggregation reorder buffer sizes for different sessions,
3341 * our ucode doesn't allow for that and has a global limit
3342 * for each station. Therefore, use the minimum of all the
3343 * aggregation sessions and our default value.
3344 */
3345 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
3346 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize,
3347 buf_size);
3348 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit =
3349 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize;
3350
3351 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3352 sta->addr, tid);
3353
3354 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq);
3355 }
3356
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3357 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3358 struct iwl_mvm_sta *mvmsta,
3359 struct iwl_mvm_tid_data *tid_data)
3360 {
3361 u16 txq_id = tid_data->txq_id;
3362
3363 lockdep_assert_held(&mvm->mutex);
3364
3365 if (iwl_mvm_has_new_tx_api(mvm))
3366 return;
3367
3368 /*
3369 * The TXQ is marked as reserved only if no traffic came through yet
3370 * This means no traffic has been sent on this TID (agg'd or not), so
3371 * we no longer have use for the queue. Since it hasn't even been
3372 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3373 * free.
3374 */
3375 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3376 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3377 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3378 }
3379 }
3380
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3381 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3382 struct ieee80211_sta *sta, u16 tid)
3383 {
3384 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3385 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3386 u16 txq_id;
3387 int err;
3388
3389 /*
3390 * If mac80211 is cleaning its state, then say that we finished since
3391 * our state has been cleared anyway.
3392 */
3393 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3394 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3395 return 0;
3396 }
3397
3398 spin_lock_bh(&mvmsta->lock);
3399
3400 txq_id = tid_data->txq_id;
3401
3402 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3403 mvmsta->deflink.sta_id, tid, txq_id,
3404 tid_data->state);
3405
3406 mvmsta->agg_tids &= ~BIT(tid);
3407
3408 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3409
3410 switch (tid_data->state) {
3411 case IWL_AGG_ON:
3412 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3413
3414 IWL_DEBUG_TX_QUEUES(mvm,
3415 "ssn = %d, next_recl = %d\n",
3416 tid_data->ssn, tid_data->next_reclaimed);
3417
3418 tid_data->ssn = 0xffff;
3419 tid_data->state = IWL_AGG_OFF;
3420 spin_unlock_bh(&mvmsta->lock);
3421
3422 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3423
3424 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3425 return 0;
3426 case IWL_AGG_STARTING:
3427 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3428 /*
3429 * The agg session has been stopped before it was set up. This
3430 * can happen when the AddBA timer times out for example.
3431 */
3432
3433 /* No barriers since we are under mutex */
3434 lockdep_assert_held(&mvm->mutex);
3435
3436 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3437 tid_data->state = IWL_AGG_OFF;
3438 err = 0;
3439 break;
3440 default:
3441 IWL_ERR(mvm,
3442 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3443 mvmsta->deflink.sta_id, tid, tid_data->state);
3444 IWL_ERR(mvm,
3445 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3446 err = -EINVAL;
3447 }
3448
3449 spin_unlock_bh(&mvmsta->lock);
3450
3451 return err;
3452 }
3453
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3454 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3455 struct ieee80211_sta *sta, u16 tid)
3456 {
3457 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3458 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3459 u16 txq_id;
3460 enum iwl_mvm_agg_state old_state;
3461
3462 /*
3463 * First set the agg state to OFF to avoid calling
3464 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3465 */
3466 spin_lock_bh(&mvmsta->lock);
3467 txq_id = tid_data->txq_id;
3468 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3469 mvmsta->deflink.sta_id, tid, txq_id,
3470 tid_data->state);
3471 old_state = tid_data->state;
3472 tid_data->state = IWL_AGG_OFF;
3473 mvmsta->agg_tids &= ~BIT(tid);
3474 spin_unlock_bh(&mvmsta->lock);
3475
3476 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3477
3478 if (old_state >= IWL_AGG_ON) {
3479 iwl_mvm_drain_sta(mvm, mvmsta, true);
3480
3481 if (iwl_mvm_has_new_tx_api(mvm)) {
3482 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id,
3483 BIT(tid)))
3484 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3485 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3486 } else {
3487 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3488 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3489 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3490 }
3491
3492 iwl_mvm_drain_sta(mvm, mvmsta, false);
3493
3494 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3495 }
3496
3497 return 0;
3498 }
3499
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3500 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3501 {
3502 int i, max = -1, max_offs = -1;
3503
3504 lockdep_assert_held(&mvm->mutex);
3505
3506 /* Pick the unused key offset with the highest 'deleted'
3507 * counter. Every time a key is deleted, all the counters
3508 * are incremented and the one that was just deleted is
3509 * reset to zero. Thus, the highest counter is the one
3510 * that was deleted longest ago. Pick that one.
3511 */
3512 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3513 if (test_bit(i, mvm->fw_key_table))
3514 continue;
3515 if (mvm->fw_key_deleted[i] > max) {
3516 max = mvm->fw_key_deleted[i];
3517 max_offs = i;
3518 }
3519 }
3520
3521 if (max_offs < 0)
3522 return STA_KEY_IDX_INVALID;
3523
3524 return max_offs;
3525 }
3526
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3527 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3528 struct ieee80211_vif *vif,
3529 struct ieee80211_sta *sta)
3530 {
3531 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3532
3533 if (sta)
3534 return iwl_mvm_sta_from_mac80211(sta);
3535
3536 /*
3537 * The device expects GTKs for station interfaces to be
3538 * installed as GTKs for the AP station. If we have no
3539 * station ID, then use AP's station ID.
3540 */
3541 if (vif->type == NL80211_IFTYPE_STATION &&
3542 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3543 u8 sta_id = mvmvif->deflink.ap_sta_id;
3544
3545 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3546 lockdep_is_held(&mvm->mutex));
3547
3548 /*
3549 * It is possible that the 'sta' parameter is NULL,
3550 * for example when a GTK is removed - the sta_id will then
3551 * be the AP ID, and no station was passed by mac80211.
3552 */
3553 if (IS_ERR_OR_NULL(sta))
3554 return NULL;
3555
3556 return iwl_mvm_sta_from_mac80211(sta);
3557 }
3558
3559 return NULL;
3560 }
3561
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3562 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3563 {
3564 int i;
3565
3566 for (i = len - 1; i >= 0; i--) {
3567 if (pn1[i] > pn2[i])
3568 return 1;
3569 if (pn1[i] < pn2[i])
3570 return -1;
3571 }
3572
3573 return 0;
3574 }
3575
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)3576 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3577 u32 sta_id,
3578 struct ieee80211_key_conf *key, bool mcast,
3579 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3580 u8 key_offset, bool mfp)
3581 {
3582 union {
3583 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3584 struct iwl_mvm_add_sta_key_cmd cmd;
3585 } u = {};
3586 __le16 key_flags;
3587 int ret;
3588 u32 status;
3589 u16 keyidx;
3590 u64 pn = 0;
3591 int i, size;
3592 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3593 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3594 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3595 new_api ? 2 : 1);
3596
3597 if (sta_id == IWL_MVM_INVALID_STA)
3598 return -EINVAL;
3599
3600 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3601 STA_KEY_FLG_KEYID_MSK;
3602 key_flags = cpu_to_le16(keyidx);
3603 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3604
3605 switch (key->cipher) {
3606 case WLAN_CIPHER_SUITE_TKIP:
3607 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3608 if (api_ver >= 2) {
3609 memcpy((void *)&u.cmd.tx_mic_key,
3610 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3611 IWL_MIC_KEY_SIZE);
3612
3613 memcpy((void *)&u.cmd.rx_mic_key,
3614 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3615 IWL_MIC_KEY_SIZE);
3616 pn = atomic64_read(&key->tx_pn);
3617
3618 } else {
3619 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3620 for (i = 0; i < 5; i++)
3621 u.cmd_v1.tkip_rx_ttak[i] =
3622 cpu_to_le16(tkip_p1k[i]);
3623 }
3624 memcpy(u.cmd.common.key, key->key, key->keylen);
3625 break;
3626 case WLAN_CIPHER_SUITE_CCMP:
3627 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3628 memcpy(u.cmd.common.key, key->key, key->keylen);
3629 if (api_ver >= 2)
3630 pn = atomic64_read(&key->tx_pn);
3631 break;
3632 case WLAN_CIPHER_SUITE_WEP104:
3633 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3634 fallthrough;
3635 case WLAN_CIPHER_SUITE_WEP40:
3636 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3637 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3638 break;
3639 case WLAN_CIPHER_SUITE_GCMP_256:
3640 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3641 fallthrough;
3642 case WLAN_CIPHER_SUITE_GCMP:
3643 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3644 memcpy(u.cmd.common.key, key->key, key->keylen);
3645 if (api_ver >= 2)
3646 pn = atomic64_read(&key->tx_pn);
3647 break;
3648 default:
3649 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3650 memcpy(u.cmd.common.key, key->key, key->keylen);
3651 }
3652
3653 if (mcast)
3654 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3655 if (mfp)
3656 key_flags |= cpu_to_le16(STA_KEY_MFP);
3657
3658 u.cmd.common.key_offset = key_offset;
3659 u.cmd.common.key_flags = key_flags;
3660 u.cmd.common.sta_id = sta_id;
3661
3662 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3663 i = 0;
3664 else
3665 i = -1;
3666
3667 for (; i < IEEE80211_NUM_TIDS; i++) {
3668 struct ieee80211_key_seq seq = {};
3669 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3670 int rx_pn_len = 8;
3671 /* there's a hole at 2/3 in FW format depending on version */
3672 int hole = api_ver >= 3 ? 0 : 2;
3673
3674 ieee80211_get_key_rx_seq(key, i, &seq);
3675
3676 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3677 rx_pn[0] = seq.tkip.iv16;
3678 rx_pn[1] = seq.tkip.iv16 >> 8;
3679 rx_pn[2 + hole] = seq.tkip.iv32;
3680 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3681 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3682 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3683 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3684 rx_pn = seq.hw.seq;
3685 rx_pn_len = seq.hw.seq_len;
3686 } else {
3687 rx_pn[0] = seq.ccmp.pn[0];
3688 rx_pn[1] = seq.ccmp.pn[1];
3689 rx_pn[2 + hole] = seq.ccmp.pn[2];
3690 rx_pn[3 + hole] = seq.ccmp.pn[3];
3691 rx_pn[4 + hole] = seq.ccmp.pn[4];
3692 rx_pn[5 + hole] = seq.ccmp.pn[5];
3693 }
3694
3695 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3696 rx_pn_len) > 0)
3697 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3698 rx_pn_len);
3699 }
3700
3701 if (api_ver >= 2) {
3702 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3703 size = sizeof(u.cmd);
3704 } else {
3705 size = sizeof(u.cmd_v1);
3706 }
3707
3708 status = ADD_STA_SUCCESS;
3709 if (cmd_flags & CMD_ASYNC)
3710 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3711 &u.cmd);
3712 else
3713 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3714 &u.cmd, &status);
3715
3716 switch (status) {
3717 case ADD_STA_SUCCESS:
3718 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3719 break;
3720 default:
3721 ret = -EIO;
3722 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3723 break;
3724 }
3725
3726 return ret;
3727 }
3728
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3729 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3730 struct ieee80211_key_conf *keyconf,
3731 u8 sta_id, bool remove_key)
3732 {
3733 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3734
3735 /* verify the key details match the required command's expectations */
3736 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3737 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3738 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3739 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3740 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3741 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3742 return -EINVAL;
3743
3744 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3745 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3746 return -EINVAL;
3747
3748 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3749 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3750
3751 if (remove_key) {
3752 /* This is a valid situation for IGTK */
3753 if (sta_id == IWL_MVM_INVALID_STA)
3754 return 0;
3755
3756 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3757 } else {
3758 struct ieee80211_key_seq seq;
3759 const u8 *pn;
3760
3761 switch (keyconf->cipher) {
3762 case WLAN_CIPHER_SUITE_AES_CMAC:
3763 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3764 break;
3765 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3766 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3767 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3768 break;
3769 default:
3770 return -EINVAL;
3771 }
3772
3773 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3774 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3775 igtk_cmd.ctrl_flags |=
3776 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3777 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3778 pn = seq.aes_cmac.pn;
3779 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3780 ((u64) pn[4] << 8) |
3781 ((u64) pn[3] << 16) |
3782 ((u64) pn[2] << 24) |
3783 ((u64) pn[1] << 32) |
3784 ((u64) pn[0] << 40));
3785 }
3786
3787 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3788 remove_key ? "removing" : "installing",
3789 keyconf->keyidx >= 6 ? "B" : "",
3790 keyconf->keyidx, igtk_cmd.sta_id);
3791
3792 if (!iwl_mvm_has_new_rx_api(mvm)) {
3793 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3794 .ctrl_flags = igtk_cmd.ctrl_flags,
3795 .key_id = igtk_cmd.key_id,
3796 .sta_id = igtk_cmd.sta_id,
3797 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3798 };
3799
3800 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3801 ARRAY_SIZE(igtk_cmd_v1.igtk));
3802 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3803 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3804 }
3805 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3806 sizeof(igtk_cmd), &igtk_cmd);
3807 }
3808
3809
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3810 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3811 struct ieee80211_vif *vif,
3812 struct ieee80211_sta *sta)
3813 {
3814 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3815
3816 if (sta)
3817 return sta->addr;
3818
3819 if (vif->type == NL80211_IFTYPE_STATION &&
3820 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3821 u8 sta_id = mvmvif->deflink.ap_sta_id;
3822 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3823 lockdep_is_held(&mvm->mutex));
3824 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
3825 return NULL;
3826
3827 return sta->addr;
3828 }
3829
3830
3831 return NULL;
3832 }
3833
__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)3834 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3835 struct ieee80211_vif *vif,
3836 struct ieee80211_sta *sta,
3837 struct ieee80211_key_conf *keyconf,
3838 u8 key_offset,
3839 bool mcast)
3840 {
3841 const u8 *addr;
3842 struct ieee80211_key_seq seq;
3843 u16 p1k[5];
3844 u32 sta_id;
3845 bool mfp = false;
3846
3847 if (sta) {
3848 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3849
3850 sta_id = mvm_sta->deflink.sta_id;
3851 mfp = sta->mfp;
3852 } else if (vif->type == NL80211_IFTYPE_AP &&
3853 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3854 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3855
3856 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3857 } else {
3858 IWL_ERR(mvm, "Failed to find station id\n");
3859 return -EINVAL;
3860 }
3861
3862 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3863 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3864 if (!addr) {
3865 IWL_ERR(mvm, "Failed to find mac address\n");
3866 return -EINVAL;
3867 }
3868
3869 /* get phase 1 key from mac80211 */
3870 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3871 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3872
3873 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3874 seq.tkip.iv32, p1k, 0, key_offset,
3875 mfp);
3876 }
3877
3878 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3879 0, NULL, 0, key_offset, mfp);
3880 }
3881
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)3882 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3883 struct ieee80211_vif *vif,
3884 struct ieee80211_sta *sta,
3885 struct ieee80211_key_conf *keyconf,
3886 u8 key_offset)
3887 {
3888 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3889 struct iwl_mvm_sta *mvm_sta;
3890 u8 sta_id = IWL_MVM_INVALID_STA;
3891 int ret;
3892 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3893
3894 lockdep_assert_held(&mvm->mutex);
3895
3896 if (vif->type != NL80211_IFTYPE_AP ||
3897 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3898 /* Get the station id from the mvm local station table */
3899 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3900 if (!mvm_sta) {
3901 IWL_ERR(mvm, "Failed to find station\n");
3902 return -EINVAL;
3903 }
3904 sta_id = mvm_sta->deflink.sta_id;
3905
3906 /*
3907 * It is possible that the 'sta' parameter is NULL, and thus
3908 * there is a need to retrieve the sta from the local station
3909 * table.
3910 */
3911 if (!sta) {
3912 sta = rcu_dereference_protected(
3913 mvm->fw_id_to_mac_id[sta_id],
3914 lockdep_is_held(&mvm->mutex));
3915 if (IS_ERR_OR_NULL(sta)) {
3916 IWL_ERR(mvm, "Invalid station id\n");
3917 return -EINVAL;
3918 }
3919 }
3920
3921 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3922 return -EINVAL;
3923 } else {
3924 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3925
3926 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3927 }
3928
3929 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3930 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3931 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3932 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3933 goto end;
3934 }
3935
3936 /* If the key_offset is not pre-assigned, we need to find a
3937 * new offset to use. In normal cases, the offset is not
3938 * pre-assigned, but during HW_RESTART we want to reuse the
3939 * same indices, so we pass them when this function is called.
3940 *
3941 * In D3 entry, we need to hardcoded the indices (because the
3942 * firmware hardcodes the PTK offset to 0). In this case, we
3943 * need to make sure we don't overwrite the hw_key_idx in the
3944 * keyconf structure, because otherwise we cannot configure
3945 * the original ones back when resuming.
3946 */
3947 if (key_offset == STA_KEY_IDX_INVALID) {
3948 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3949 if (key_offset == STA_KEY_IDX_INVALID)
3950 return -ENOSPC;
3951 keyconf->hw_key_idx = key_offset;
3952 }
3953
3954 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3955 if (ret)
3956 goto end;
3957
3958 /*
3959 * For WEP, the same key is used for multicast and unicast. Upload it
3960 * again, using the same key offset, and now pointing the other one
3961 * to the same key slot (offset).
3962 * If this fails, remove the original as well.
3963 */
3964 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3965 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3966 sta) {
3967 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3968 key_offset, !mcast);
3969 if (ret) {
3970 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3971 goto end;
3972 }
3973 }
3974
3975 __set_bit(key_offset, mvm->fw_key_table);
3976
3977 end:
3978 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3979 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3980 sta ? sta->addr : zero_addr, ret);
3981 return ret;
3982 }
3983
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3984 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3985 struct ieee80211_vif *vif,
3986 struct ieee80211_sta *sta,
3987 struct ieee80211_key_conf *keyconf)
3988 {
3989 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3990 struct iwl_mvm_sta *mvm_sta;
3991 u8 sta_id = IWL_MVM_INVALID_STA;
3992 int ret, i;
3993
3994 lockdep_assert_held(&mvm->mutex);
3995
3996 /* Get the station from the mvm local station table */
3997 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3998 if (mvm_sta)
3999 sta_id = mvm_sta->deflink.sta_id;
4000 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
4001 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id;
4002
4003
4004 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
4005 keyconf->keyidx, sta_id);
4006
4007 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
4008 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
4009 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
4010 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
4011
4012 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
4013 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
4014 keyconf->hw_key_idx);
4015 return -ENOENT;
4016 }
4017
4018 /* track which key was deleted last */
4019 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
4020 if (mvm->fw_key_deleted[i] < U8_MAX)
4021 mvm->fw_key_deleted[i]++;
4022 }
4023 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
4024
4025 if (sta && !mvm_sta) {
4026 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
4027 return 0;
4028 }
4029
4030 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
4031 if (ret)
4032 return ret;
4033
4034 /* delete WEP key twice to get rid of (now useless) offset */
4035 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4036 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
4037 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
4038
4039 return ret;
4040 }
4041
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)4042 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
4043 struct ieee80211_vif *vif,
4044 struct ieee80211_key_conf *keyconf,
4045 struct ieee80211_sta *sta, u32 iv32,
4046 u16 *phase1key)
4047 {
4048 struct iwl_mvm_sta *mvm_sta;
4049 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
4050 bool mfp = sta ? sta->mfp : false;
4051
4052 rcu_read_lock();
4053
4054 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
4055 if (WARN_ON_ONCE(!mvm_sta))
4056 goto unlock;
4057 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast,
4058 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
4059 mfp);
4060
4061 unlock:
4062 rcu_read_unlock();
4063 }
4064
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)4065 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
4066 struct ieee80211_sta *sta)
4067 {
4068 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4069 struct iwl_mvm_add_sta_cmd cmd = {
4070 .add_modify = STA_MODE_MODIFY,
4071 .sta_id = mvmsta->deflink.sta_id,
4072 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
4073 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4074 };
4075 int ret;
4076
4077 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4078 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4079 if (ret)
4080 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4081 }
4082
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)4083 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
4084 struct ieee80211_sta *sta,
4085 enum ieee80211_frame_release_type reason,
4086 u16 cnt, u16 tids, bool more_data,
4087 bool single_sta_queue)
4088 {
4089 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4090 struct iwl_mvm_add_sta_cmd cmd = {
4091 .add_modify = STA_MODE_MODIFY,
4092 .sta_id = mvmsta->deflink.sta_id,
4093 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
4094 .sleep_tx_count = cpu_to_le16(cnt),
4095 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4096 };
4097 int tid, ret;
4098 unsigned long _tids = tids;
4099
4100 /* convert TIDs to ACs - we don't support TSPEC so that's OK
4101 * Note that this field is reserved and unused by firmware not
4102 * supporting GO uAPSD, so it's safe to always do this.
4103 */
4104 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
4105 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
4106
4107 /* If we're releasing frames from aggregation or dqa queues then check
4108 * if all the queues that we're releasing frames from, combined, have:
4109 * - more frames than the service period, in which case more_data
4110 * needs to be set
4111 * - fewer than 'cnt' frames, in which case we need to adjust the
4112 * firmware command (but do that unconditionally)
4113 */
4114 if (single_sta_queue) {
4115 int remaining = cnt;
4116 int sleep_tx_count;
4117
4118 spin_lock_bh(&mvmsta->lock);
4119 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
4120 struct iwl_mvm_tid_data *tid_data;
4121 u16 n_queued;
4122
4123 tid_data = &mvmsta->tid_data[tid];
4124
4125 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
4126 if (n_queued > remaining) {
4127 more_data = true;
4128 remaining = 0;
4129 break;
4130 }
4131 remaining -= n_queued;
4132 }
4133 sleep_tx_count = cnt - remaining;
4134 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
4135 mvmsta->sleep_tx_count = sleep_tx_count;
4136 spin_unlock_bh(&mvmsta->lock);
4137
4138 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
4139 if (WARN_ON(cnt - remaining == 0)) {
4140 ieee80211_sta_eosp(sta);
4141 return;
4142 }
4143 }
4144
4145 /* Note: this is ignored by firmware not supporting GO uAPSD */
4146 if (more_data)
4147 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
4148
4149 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
4150 mvmsta->next_status_eosp = true;
4151 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
4152 } else {
4153 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
4154 }
4155
4156 /* block the Tx queues until the FW updated the sleep Tx count */
4157 iwl_trans_block_txq_ptrs(mvm->trans, true);
4158
4159 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
4160 CMD_ASYNC | CMD_WANT_ASYNC_CALLBACK,
4161 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4162 if (ret)
4163 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4164 }
4165
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)4166 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
4167 struct iwl_rx_cmd_buffer *rxb)
4168 {
4169 struct iwl_rx_packet *pkt = rxb_addr(rxb);
4170 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
4171 struct ieee80211_sta *sta;
4172 u32 sta_id = le32_to_cpu(notif->sta_id);
4173
4174 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
4175 return;
4176
4177 rcu_read_lock();
4178 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
4179 if (!IS_ERR_OR_NULL(sta))
4180 ieee80211_sta_eosp(sta);
4181 rcu_read_unlock();
4182 }
4183
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)4184 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
4185 struct iwl_mvm_sta *mvmsta,
4186 bool disable)
4187 {
4188 struct iwl_mvm_add_sta_cmd cmd = {
4189 .add_modify = STA_MODE_MODIFY,
4190 .sta_id = mvmsta->deflink.sta_id,
4191 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4192 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4193 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4194 };
4195 int ret;
4196
4197 if (mvm->mld_api_is_used) {
4198 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable);
4199 return;
4200 }
4201
4202 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4203 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4204 if (ret)
4205 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4206 }
4207
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)4208 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
4209 struct ieee80211_sta *sta,
4210 bool disable)
4211 {
4212 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4213
4214 if (mvm->mld_api_is_used) {
4215 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable);
4216 return;
4217 }
4218
4219 spin_lock_bh(&mvm_sta->lock);
4220
4221 if (mvm_sta->disable_tx == disable) {
4222 spin_unlock_bh(&mvm_sta->lock);
4223 return;
4224 }
4225
4226 mvm_sta->disable_tx = disable;
4227
4228 /*
4229 * If sta PS state is handled by mac80211, tell it to start/stop
4230 * queuing tx for this station.
4231 */
4232 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4233 ieee80211_sta_block_awake(mvm->hw, sta, disable);
4234
4235 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4236
4237 spin_unlock_bh(&mvm_sta->lock);
4238 }
4239
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)4240 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4241 struct iwl_mvm_vif *mvmvif,
4242 struct iwl_mvm_int_sta *sta,
4243 bool disable)
4244 {
4245 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4246 struct iwl_mvm_add_sta_cmd cmd = {
4247 .add_modify = STA_MODE_MODIFY,
4248 .sta_id = sta->sta_id,
4249 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4250 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4251 .mac_id_n_color = cpu_to_le32(id),
4252 };
4253 int ret;
4254
4255 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4256 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4257 if (ret)
4258 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4259 }
4260
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)4261 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4262 struct iwl_mvm_vif *mvmvif,
4263 bool disable)
4264 {
4265 struct ieee80211_sta *sta;
4266 struct iwl_mvm_sta *mvm_sta;
4267 int i;
4268
4269 if (mvm->mld_api_is_used) {
4270 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif, disable);
4271 return;
4272 }
4273
4274 rcu_read_lock();
4275
4276 /* Block/unblock all the stations of the given mvmvif */
4277 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4278 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4279 if (IS_ERR_OR_NULL(sta))
4280 continue;
4281
4282 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4283 if (mvm_sta->mac_id_n_color !=
4284 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4285 continue;
4286
4287 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4288 }
4289
4290 rcu_read_unlock();
4291
4292 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4293 return;
4294
4295 /* Need to block/unblock also multicast station */
4296 if (mvmvif->deflink.mcast_sta.sta_id != IWL_MVM_INVALID_STA)
4297 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4298 &mvmvif->deflink.mcast_sta,
4299 disable);
4300
4301 /*
4302 * Only unblock the broadcast station (FW blocks it for immediate
4303 * quiet, not the driver)
4304 */
4305 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4306 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4307 &mvmvif->deflink.bcast_sta,
4308 disable);
4309 }
4310
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)4311 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4312 {
4313 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4314 struct iwl_mvm_sta *mvmsta;
4315
4316 rcu_read_lock();
4317
4318 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id);
4319
4320 if (mvmsta)
4321 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4322
4323 rcu_read_unlock();
4324 }
4325
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)4326 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4327 {
4328 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4329
4330 /*
4331 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4332 * to align the wrap around of ssn so we compare relevant values.
4333 */
4334 if (mvm->trans->trans_cfg->gen2)
4335 sn &= 0xff;
4336
4337 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4338 }
4339
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)4340 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4341 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4342 u8 *key, u32 key_len)
4343 {
4344 int ret;
4345 u16 queue;
4346 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4347 struct ieee80211_key_conf *keyconf;
4348 unsigned int wdg_timeout =
4349 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
4350 bool mld = iwl_mvm_has_mld_api(mvm->fw);
4351 u32 type = mld ? STATION_TYPE_PEER : IWL_STA_LINK;
4352
4353 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4354 NL80211_IFTYPE_UNSPECIFIED, type);
4355 if (ret)
4356 return ret;
4357
4358 if (mld)
4359 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr,
4360 mvmvif->deflink.fw_link_id,
4361 &queue,
4362 IWL_MAX_TID_COUNT,
4363 &wdg_timeout);
4364 else
4365 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id,
4366 mvmvif->color, addr, sta,
4367 &queue,
4368 IWL_MVM_TX_FIFO_BE);
4369 if (ret)
4370 goto out;
4371
4372 keyconf = kzalloc(sizeof(*keyconf) + key_len, GFP_KERNEL);
4373 if (!keyconf) {
4374 ret = -ENOBUFS;
4375 goto out;
4376 }
4377
4378 keyconf->cipher = cipher;
4379 memcpy(keyconf->key, key, key_len);
4380 keyconf->keylen = key_len;
4381 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE;
4382
4383 if (mld) {
4384 /* The MFP flag is set according to the station mfp field. Since
4385 * we don't have a station, set it manually.
4386 */
4387 u32 key_flags =
4388 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) |
4389 IWL_SEC_KEY_FLAG_MFP;
4390 u32 sta_mask = BIT(sta->sta_id);
4391
4392 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf);
4393 } else {
4394 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4395 0, NULL, 0, 0, true);
4396 }
4397
4398 kfree(keyconf);
4399 return 0;
4400 out:
4401 iwl_mvm_dealloc_int_sta(mvm, sta);
4402 return ret;
4403 }
4404
iwl_mvm_cancel_channel_switch(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id)4405 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4406 struct ieee80211_vif *vif,
4407 u32 id)
4408 {
4409 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4410 .id = cpu_to_le32(id),
4411 };
4412 int ret;
4413
4414 ret = iwl_mvm_send_cmd_pdu(mvm,
4415 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4416 CMD_ASYNC,
4417 sizeof(cancel_channel_switch_cmd),
4418 &cancel_channel_switch_cmd);
4419 if (ret)
4420 IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4421 }
4422