1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2015, 2018-2024 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->chanreq.oper.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.chanreq.oper.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 512 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 struct ieee80211_link_sta *link_sta;
869 unsigned int link_id;
870
871 rcu_read_lock();
872 for_each_sta_active_link(mvmsta->vif, sta, link_sta, 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 rcu_read_unlock();
883 } else {
884 sta_mask |= BIT(sta_id);
885 }
886
887 if (!sta_mask)
888 return -EINVAL;
889
890 do {
891 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask,
892 tid, size, timeout);
893
894 if (queue < 0)
895 IWL_DEBUG_TX_QUEUES(mvm,
896 "Failed allocating TXQ of size %d for sta mask %x tid %d, ret: %d\n",
897 size, sta_mask, tid, queue);
898 size /= 2;
899 } while (queue < 0 && size >= 16);
900
901 if (queue < 0)
902 return queue;
903
904 IWL_DEBUG_TX_QUEUES(mvm, "Enabling TXQ #%d for sta mask 0x%x tid %d\n",
905 queue, sta_mask, tid);
906
907 return queue;
908 }
909
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)910 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
911 struct ieee80211_sta *sta, u8 ac,
912 int tid)
913 {
914 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
915 struct iwl_mvm_txq *mvmtxq =
916 iwl_mvm_txq_from_tid(sta, tid);
917 unsigned int wdg_timeout =
918 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
919 int queue = -1;
920
921 lockdep_assert_held(&mvm->mutex);
922
923 IWL_DEBUG_TX_QUEUES(mvm,
924 "Allocating queue for sta %d on tid %d\n",
925 mvmsta->deflink.sta_id, tid);
926 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
927 tid, wdg_timeout);
928 if (queue < 0)
929 return queue;
930
931 mvmtxq->txq_id = queue;
932 mvm->tvqm_info[queue].txq_tid = tid;
933 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id;
934
935 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
936
937 spin_lock_bh(&mvmsta->lock);
938 mvmsta->tid_data[tid].txq_id = queue;
939 spin_unlock_bh(&mvmsta->lock);
940
941 return 0;
942 }
943
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)944 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
945 struct ieee80211_sta *sta,
946 int queue, u8 sta_id, u8 tid)
947 {
948 bool enable_queue = true;
949
950 /* Make sure this TID isn't already enabled */
951 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
952 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
953 queue, tid);
954 return false;
955 }
956
957 /* Update mappings and refcounts */
958 if (mvm->queue_info[queue].tid_bitmap)
959 enable_queue = false;
960
961 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
962 mvm->queue_info[queue].ra_sta_id = sta_id;
963
964 if (enable_queue) {
965 if (tid != IWL_MAX_TID_COUNT)
966 mvm->queue_info[queue].mac80211_ac =
967 tid_to_mac80211_ac[tid];
968 else
969 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
970
971 mvm->queue_info[queue].txq_tid = tid;
972 }
973
974 if (sta) {
975 struct iwl_mvm_txq *mvmtxq =
976 iwl_mvm_txq_from_tid(sta, tid);
977
978 mvmtxq->txq_id = queue;
979 }
980
981 IWL_DEBUG_TX_QUEUES(mvm,
982 "Enabling TXQ #%d tids=0x%x\n",
983 queue, mvm->queue_info[queue].tid_bitmap);
984
985 return enable_queue;
986 }
987
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)988 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
989 int queue, u16 ssn,
990 const struct iwl_trans_txq_scd_cfg *cfg,
991 unsigned int wdg_timeout)
992 {
993 struct iwl_scd_txq_cfg_cmd cmd = {
994 .scd_queue = queue,
995 .action = SCD_CFG_ENABLE_QUEUE,
996 .window = cfg->frame_limit,
997 .sta_id = cfg->sta_id,
998 .ssn = cpu_to_le16(ssn),
999 .tx_fifo = cfg->fifo,
1000 .aggregate = cfg->aggregate,
1001 .tid = cfg->tid,
1002 };
1003 bool inc_ssn;
1004
1005 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1006 return false;
1007
1008 /* Send the enabling command if we need to */
1009 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
1010 return false;
1011
1012 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
1013 NULL, wdg_timeout);
1014 if (inc_ssn)
1015 le16_add_cpu(&cmd.ssn, 1);
1016
1017 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
1018 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
1019
1020 return inc_ssn;
1021 }
1022
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)1023 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
1024 {
1025 struct iwl_scd_txq_cfg_cmd cmd = {
1026 .scd_queue = queue,
1027 .action = SCD_CFG_UPDATE_QUEUE_TID,
1028 };
1029 int tid;
1030 unsigned long tid_bitmap;
1031 int ret;
1032
1033 lockdep_assert_held(&mvm->mutex);
1034
1035 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1036 return;
1037
1038 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1039
1040 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
1041 return;
1042
1043 /* Find any TID for queue */
1044 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1045 cmd.tid = tid;
1046 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1047
1048 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
1049 if (ret) {
1050 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
1051 queue, ret);
1052 return;
1053 }
1054
1055 mvm->queue_info[queue].txq_tid = tid;
1056 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
1057 queue, tid);
1058 }
1059
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)1060 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1061 {
1062 struct ieee80211_sta *sta;
1063 struct iwl_mvm_sta *mvmsta;
1064 u8 sta_id;
1065 int tid = -1;
1066 unsigned long tid_bitmap;
1067 unsigned int wdg_timeout;
1068 int ssn;
1069 int ret = true;
1070
1071 /* queue sharing is disabled on new TX path */
1072 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1073 return;
1074
1075 lockdep_assert_held(&mvm->mutex);
1076
1077 sta_id = mvm->queue_info[queue].ra_sta_id;
1078 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1079
1080 /* Find TID for queue, and make sure it is the only one on the queue */
1081 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1082 if (tid_bitmap != BIT(tid)) {
1083 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1084 queue, tid_bitmap);
1085 return;
1086 }
1087
1088 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1089 tid);
1090
1091 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1092 lockdep_is_held(&mvm->mutex));
1093
1094 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1095 return;
1096
1097 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1098 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1099
1100 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1101
1102 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1103 tid_to_mac80211_ac[tid], ssn,
1104 wdg_timeout, true,
1105 iwl_mvm_txq_from_tid(sta, tid));
1106 if (ret) {
1107 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1108 return;
1109 }
1110
1111 /* If aggs should be turned back on - do it */
1112 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1113 struct iwl_mvm_add_sta_cmd cmd = {0};
1114
1115 mvmsta->tid_disable_agg &= ~BIT(tid);
1116
1117 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1118 cmd.sta_id = mvmsta->deflink.sta_id;
1119 cmd.add_modify = STA_MODE_MODIFY;
1120 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1121 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1122 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1123
1124 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1125 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1126 if (!ret) {
1127 IWL_DEBUG_TX_QUEUES(mvm,
1128 "TXQ #%d is now aggregated again\n",
1129 queue);
1130
1131 /* Mark queue intenally as aggregating again */
1132 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1133 }
1134 }
1135
1136 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1137 }
1138
1139 /*
1140 * Remove inactive TIDs of a given queue.
1141 * If all queue TIDs are inactive - mark the queue as inactive
1142 * If only some the queue TIDs are inactive - unmap them from the queue
1143 *
1144 * Returns %true if all TIDs were removed and the queue could be reused.
1145 */
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)1146 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1147 struct iwl_mvm_sta *mvmsta, int queue,
1148 unsigned long tid_bitmap,
1149 unsigned long *unshare_queues,
1150 unsigned long *changetid_queues)
1151 {
1152 unsigned int tid;
1153
1154 lockdep_assert_held(&mvmsta->lock);
1155 lockdep_assert_held(&mvm->mutex);
1156
1157 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1158 return false;
1159
1160 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1161 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1162 /* If some TFDs are still queued - don't mark TID as inactive */
1163 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1164 tid_bitmap &= ~BIT(tid);
1165
1166 /* Don't mark as inactive any TID that has an active BA */
1167 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1168 tid_bitmap &= ~BIT(tid);
1169 }
1170
1171 /* If all TIDs in the queue are inactive - return it can be reused */
1172 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1173 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1174 return true;
1175 }
1176
1177 /*
1178 * If we are here, this is a shared queue and not all TIDs timed-out.
1179 * Remove the ones that did.
1180 */
1181 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1182 u16 q_tid_bitmap;
1183
1184 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1185 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1186
1187 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1188
1189 /*
1190 * We need to take into account a situation in which a TXQ was
1191 * allocated to TID x, and then turned shared by adding TIDs y
1192 * and z. If TID x becomes inactive and is removed from the TXQ,
1193 * ownership must be given to one of the remaining TIDs.
1194 * This is mainly because if TID x continues - a new queue can't
1195 * be allocated for it as long as it is an owner of another TXQ.
1196 *
1197 * Mark this queue in the right bitmap, we'll send the command
1198 * to the firmware later.
1199 */
1200 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1201 set_bit(queue, changetid_queues);
1202
1203 IWL_DEBUG_TX_QUEUES(mvm,
1204 "Removing inactive TID %d from shared Q:%d\n",
1205 tid, queue);
1206 }
1207
1208 IWL_DEBUG_TX_QUEUES(mvm,
1209 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1210 mvm->queue_info[queue].tid_bitmap);
1211
1212 /*
1213 * There may be different TIDs with the same mac queues, so make
1214 * sure all TIDs have existing corresponding mac queues enabled
1215 */
1216 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1217
1218 /* If the queue is marked as shared - "unshare" it */
1219 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1220 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1221 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1222 queue);
1223 set_bit(queue, unshare_queues);
1224 }
1225
1226 return false;
1227 }
1228
1229 /*
1230 * Check for inactivity - this includes checking if any queue
1231 * can be unshared and finding one (and only one) that can be
1232 * reused.
1233 * This function is also invoked as a sort of clean-up task,
1234 * in which case @alloc_for_sta is IWL_MVM_INVALID_STA.
1235 *
1236 * Returns the queue number, or -ENOSPC.
1237 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1238 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1239 {
1240 unsigned long now = jiffies;
1241 unsigned long unshare_queues = 0;
1242 unsigned long changetid_queues = 0;
1243 int i, ret, free_queue = -ENOSPC;
1244 struct ieee80211_sta *queue_owner = NULL;
1245
1246 lockdep_assert_held(&mvm->mutex);
1247
1248 if (iwl_mvm_has_new_tx_api(mvm))
1249 return -ENOSPC;
1250
1251 rcu_read_lock();
1252
1253 /* we skip the CMD queue below by starting at 1 */
1254 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1255
1256 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1257 struct ieee80211_sta *sta;
1258 struct iwl_mvm_sta *mvmsta;
1259 u8 sta_id;
1260 int tid;
1261 unsigned long inactive_tid_bitmap = 0;
1262 unsigned long queue_tid_bitmap;
1263
1264 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1265 if (!queue_tid_bitmap)
1266 continue;
1267
1268 /* If TXQ isn't in active use anyway - nothing to do here... */
1269 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1270 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1271 continue;
1272
1273 /* Check to see if there are inactive TIDs on this queue */
1274 for_each_set_bit(tid, &queue_tid_bitmap,
1275 IWL_MAX_TID_COUNT + 1) {
1276 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1277 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1278 continue;
1279
1280 inactive_tid_bitmap |= BIT(tid);
1281 }
1282
1283 /* If all TIDs are active - finish check on this queue */
1284 if (!inactive_tid_bitmap)
1285 continue;
1286
1287 /*
1288 * If we are here - the queue hadn't been served recently and is
1289 * in use
1290 */
1291
1292 sta_id = mvm->queue_info[i].ra_sta_id;
1293 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1294
1295 /*
1296 * If the STA doesn't exist anymore, it isn't an error. It could
1297 * be that it was removed since getting the queues, and in this
1298 * case it should've inactivated its queues anyway.
1299 */
1300 if (IS_ERR_OR_NULL(sta))
1301 continue;
1302
1303 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1304
1305 spin_lock_bh(&mvmsta->lock);
1306 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1307 inactive_tid_bitmap,
1308 &unshare_queues,
1309 &changetid_queues);
1310 if (ret && free_queue < 0) {
1311 queue_owner = sta;
1312 free_queue = i;
1313 }
1314 /* only unlock sta lock - we still need the queue info lock */
1315 spin_unlock_bh(&mvmsta->lock);
1316 }
1317
1318
1319 /* Reconfigure queues requiring reconfiguation */
1320 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1321 iwl_mvm_unshare_queue(mvm, i);
1322 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1323 iwl_mvm_change_queue_tid(mvm, i);
1324
1325 rcu_read_unlock();
1326
1327 if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
1328 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1329 alloc_for_sta);
1330 if (ret)
1331 return ret;
1332 }
1333
1334 return free_queue;
1335 }
1336
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1337 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1338 struct ieee80211_sta *sta, u8 ac, int tid)
1339 {
1340 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1341 struct iwl_trans_txq_scd_cfg cfg = {
1342 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1343 .sta_id = mvmsta->deflink.sta_id,
1344 .tid = tid,
1345 .frame_limit = IWL_FRAME_LIMIT,
1346 };
1347 unsigned int wdg_timeout =
1348 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif, false, false);
1349 int queue = -1;
1350 u16 queue_tmp;
1351 unsigned long disable_agg_tids = 0;
1352 enum iwl_mvm_agg_state queue_state;
1353 bool shared_queue = false, inc_ssn;
1354 int ssn;
1355 unsigned long tfd_queue_mask;
1356 int ret;
1357
1358 lockdep_assert_held(&mvm->mutex);
1359
1360 if (iwl_mvm_has_new_tx_api(mvm))
1361 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1362
1363 spin_lock_bh(&mvmsta->lock);
1364 tfd_queue_mask = mvmsta->tfd_queue_msk;
1365 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1366 spin_unlock_bh(&mvmsta->lock);
1367
1368 if (tid == IWL_MAX_TID_COUNT) {
1369 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1370 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1371 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1372 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1373 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1374 queue);
1375
1376 /* If no such queue is found, we'll use a DATA queue instead */
1377 }
1378
1379 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1380 (mvm->queue_info[mvmsta->reserved_queue].status ==
1381 IWL_MVM_QUEUE_RESERVED)) {
1382 queue = mvmsta->reserved_queue;
1383 mvm->queue_info[queue].reserved = true;
1384 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1385 }
1386
1387 if (queue < 0)
1388 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1389 IWL_MVM_DQA_MIN_DATA_QUEUE,
1390 IWL_MVM_DQA_MAX_DATA_QUEUE);
1391 if (queue < 0) {
1392 /* try harder - perhaps kill an inactive queue */
1393 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1394 }
1395
1396 /* No free queue - we'll have to share */
1397 if (queue <= 0) {
1398 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1399 if (queue > 0) {
1400 shared_queue = true;
1401 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1402 }
1403 }
1404
1405 /*
1406 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1407 * to make sure no one else takes it.
1408 * This will allow avoiding re-acquiring the lock at the end of the
1409 * configuration. On error we'll mark it back as free.
1410 */
1411 if (queue > 0 && !shared_queue)
1412 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1413
1414 /* This shouldn't happen - out of queues */
1415 if (WARN_ON(queue <= 0)) {
1416 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1417 tid, cfg.sta_id);
1418 return queue;
1419 }
1420
1421 /*
1422 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1423 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1424 * as aggregatable.
1425 * Mark all DATA queues as allowing to be aggregated at some point
1426 */
1427 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1428 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1429
1430 IWL_DEBUG_TX_QUEUES(mvm,
1431 "Allocating %squeue #%d to sta %d on tid %d\n",
1432 shared_queue ? "shared " : "", queue,
1433 mvmsta->deflink.sta_id, tid);
1434
1435 if (shared_queue) {
1436 /* Disable any open aggs on this queue */
1437 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1438
1439 if (disable_agg_tids) {
1440 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1441 queue);
1442 iwl_mvm_invalidate_sta_queue(mvm, queue,
1443 disable_agg_tids, false);
1444 }
1445 }
1446
1447 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1448
1449 /*
1450 * Mark queue as shared in transport if shared
1451 * Note this has to be done after queue enablement because enablement
1452 * can also set this value, and there is no indication there to shared
1453 * queues
1454 */
1455 if (shared_queue)
1456 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1457
1458 spin_lock_bh(&mvmsta->lock);
1459 /*
1460 * This looks racy, but it is not. We have only one packet for
1461 * this ra/tid in our Tx path since we stop the Qdisc when we
1462 * need to allocate a new TFD queue.
1463 */
1464 if (inc_ssn) {
1465 mvmsta->tid_data[tid].seq_number += 0x10;
1466 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1467 }
1468 mvmsta->tid_data[tid].txq_id = queue;
1469 mvmsta->tfd_queue_msk |= BIT(queue);
1470 queue_state = mvmsta->tid_data[tid].state;
1471
1472 if (mvmsta->reserved_queue == queue)
1473 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1474 spin_unlock_bh(&mvmsta->lock);
1475
1476 if (!shared_queue) {
1477 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1478 if (ret)
1479 goto out_err;
1480
1481 /* If we need to re-enable aggregations... */
1482 if (queue_state == IWL_AGG_ON) {
1483 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1484 if (ret)
1485 goto out_err;
1486 }
1487 } else {
1488 /* Redirect queue, if needed */
1489 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1490 wdg_timeout, false,
1491 iwl_mvm_txq_from_tid(sta, tid));
1492 if (ret)
1493 goto out_err;
1494 }
1495
1496 return 0;
1497
1498 out_err:
1499 queue_tmp = queue;
1500 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid);
1501
1502 return ret;
1503 }
1504
iwl_mvm_sta_ensure_queue(struct iwl_mvm * mvm,struct ieee80211_txq * txq)1505 int iwl_mvm_sta_ensure_queue(struct iwl_mvm *mvm,
1506 struct ieee80211_txq *txq)
1507 {
1508 struct iwl_mvm_txq *mvmtxq = iwl_mvm_txq_from_mac80211(txq);
1509 int ret = -EINVAL;
1510
1511 lockdep_assert_held(&mvm->mutex);
1512
1513 if (likely(test_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state)) ||
1514 !txq->sta) {
1515 return 0;
1516 }
1517
1518 if (!iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, txq->tid)) {
1519 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1520 ret = 0;
1521 }
1522
1523 local_bh_disable();
1524 spin_lock(&mvm->add_stream_lock);
1525 if (!list_empty(&mvmtxq->list))
1526 list_del_init(&mvmtxq->list);
1527 spin_unlock(&mvm->add_stream_lock);
1528 local_bh_enable();
1529
1530 return ret;
1531 }
1532
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1533 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1534 {
1535 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1536 add_stream_wk);
1537
1538 mutex_lock(&mvm->mutex);
1539
1540 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1541
1542 while (!list_empty(&mvm->add_stream_txqs)) {
1543 struct iwl_mvm_txq *mvmtxq;
1544 struct ieee80211_txq *txq;
1545 u8 tid;
1546
1547 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1548 struct iwl_mvm_txq, list);
1549
1550 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1551 drv_priv);
1552 tid = txq->tid;
1553 if (tid == IEEE80211_NUM_TIDS)
1554 tid = IWL_MAX_TID_COUNT;
1555
1556 /*
1557 * We can't really do much here, but if this fails we can't
1558 * transmit anyway - so just don't transmit the frame etc.
1559 * and let them back up ... we've tried our best to allocate
1560 * a queue in the function itself.
1561 */
1562 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1563 spin_lock_bh(&mvm->add_stream_lock);
1564 list_del_init(&mvmtxq->list);
1565 spin_unlock_bh(&mvm->add_stream_lock);
1566 continue;
1567 }
1568
1569 /* now we're ready, any remaining races/concurrency will be
1570 * handled in iwl_mvm_mac_itxq_xmit()
1571 */
1572 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1573
1574 local_bh_disable();
1575 spin_lock(&mvm->add_stream_lock);
1576 list_del_init(&mvmtxq->list);
1577 spin_unlock(&mvm->add_stream_lock);
1578
1579 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1580 local_bh_enable();
1581 }
1582
1583 mutex_unlock(&mvm->mutex);
1584 }
1585
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1586 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1587 struct ieee80211_sta *sta,
1588 enum nl80211_iftype vif_type)
1589 {
1590 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1591 int queue;
1592
1593 /* queue reserving is disabled on new TX path */
1594 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1595 return 0;
1596
1597 /* run the general cleanup/unsharing of queues */
1598 iwl_mvm_inactivity_check(mvm, IWL_MVM_INVALID_STA);
1599
1600 /* Make sure we have free resources for this STA */
1601 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1602 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1603 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1604 IWL_MVM_QUEUE_FREE))
1605 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1606 else
1607 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1608 IWL_MVM_DQA_MIN_DATA_QUEUE,
1609 IWL_MVM_DQA_MAX_DATA_QUEUE);
1610 if (queue < 0) {
1611 /* try again - this time kick out a queue if needed */
1612 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1613 if (queue < 0) {
1614 IWL_ERR(mvm, "No available queues for new station\n");
1615 return -ENOSPC;
1616 }
1617 }
1618 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1619
1620 mvmsta->reserved_queue = queue;
1621
1622 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1623 queue, mvmsta->deflink.sta_id);
1624
1625 return 0;
1626 }
1627
1628 /*
1629 * In DQA mode, after a HW restart the queues should be allocated as before, in
1630 * order to avoid race conditions when there are shared queues. This function
1631 * does the re-mapping and queue allocation.
1632 *
1633 * Note that re-enabling aggregations isn't done in this function.
1634 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1635 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1636 struct ieee80211_sta *sta)
1637 {
1638 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1639 unsigned int wdg =
1640 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif, false, false);
1641 int i;
1642 struct iwl_trans_txq_scd_cfg cfg = {
1643 .sta_id = mvm_sta->deflink.sta_id,
1644 .frame_limit = IWL_FRAME_LIMIT,
1645 };
1646
1647 /* Make sure reserved queue is still marked as such (if allocated) */
1648 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1649 mvm->queue_info[mvm_sta->reserved_queue].status =
1650 IWL_MVM_QUEUE_RESERVED;
1651
1652 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1653 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1654 int txq_id = tid_data->txq_id;
1655 int ac;
1656
1657 if (txq_id == IWL_MVM_INVALID_QUEUE)
1658 continue;
1659
1660 ac = tid_to_mac80211_ac[i];
1661
1662 if (iwl_mvm_has_new_tx_api(mvm)) {
1663 IWL_DEBUG_TX_QUEUES(mvm,
1664 "Re-mapping sta %d tid %d\n",
1665 mvm_sta->deflink.sta_id, i);
1666 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta,
1667 mvm_sta->deflink.sta_id,
1668 i, wdg);
1669 /*
1670 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1671 * to try again later, we have no other good way of
1672 * failing here
1673 */
1674 if (txq_id < 0)
1675 txq_id = IWL_MVM_INVALID_QUEUE;
1676 tid_data->txq_id = txq_id;
1677
1678 /*
1679 * Since we don't set the seq number after reset, and HW
1680 * sets it now, FW reset will cause the seq num to start
1681 * at 0 again, so driver will need to update it
1682 * internally as well, so it keeps in sync with real val
1683 */
1684 tid_data->seq_number = 0;
1685 } else {
1686 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1687
1688 cfg.tid = i;
1689 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1690 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1691 txq_id ==
1692 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1693
1694 IWL_DEBUG_TX_QUEUES(mvm,
1695 "Re-mapping sta %d tid %d to queue %d\n",
1696 mvm_sta->deflink.sta_id, i,
1697 txq_id);
1698
1699 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1700 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1701 }
1702 }
1703 }
1704
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1705 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1706 struct iwl_mvm_int_sta *sta,
1707 const u8 *addr,
1708 u16 mac_id, u16 color)
1709 {
1710 struct iwl_mvm_add_sta_cmd cmd;
1711 int ret;
1712 u32 status = ADD_STA_SUCCESS;
1713
1714 lockdep_assert_held(&mvm->mutex);
1715
1716 memset(&cmd, 0, sizeof(cmd));
1717 cmd.sta_id = sta->sta_id;
1718
1719 if (iwl_mvm_has_new_station_api(mvm->fw) &&
1720 sta->type == IWL_STA_AUX_ACTIVITY)
1721 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1722 else
1723 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1724 color));
1725
1726 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1727 cmd.station_type = sta->type;
1728
1729 if (!iwl_mvm_has_new_tx_api(mvm))
1730 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1731 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1732
1733 if (addr)
1734 memcpy(cmd.addr, addr, ETH_ALEN);
1735
1736 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1737 iwl_mvm_add_sta_cmd_size(mvm),
1738 &cmd, &status);
1739 if (ret)
1740 return ret;
1741
1742 switch (status & IWL_ADD_STA_STATUS_MASK) {
1743 case ADD_STA_SUCCESS:
1744 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1745 return 0;
1746 default:
1747 ret = -EIO;
1748 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1749 status);
1750 break;
1751 }
1752 return ret;
1753 }
1754
1755 /* 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)1756 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1757 struct ieee80211_sta *sta, int sta_id, u8 sta_type)
1758 {
1759 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1760 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1761 struct iwl_mvm_rxq_dup_data *dup_data;
1762 int i, ret = 0;
1763
1764 lockdep_assert_held(&mvm->mutex);
1765
1766 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1767 mvmvif->color);
1768 mvm_sta->vif = vif;
1769
1770 /* for MLD sta_id(s) should be allocated for each link before calling
1771 * this function
1772 */
1773 if (!mvm->mld_api_is_used) {
1774 if (WARN_ON(sta_id == IWL_MVM_INVALID_STA))
1775 return -EINVAL;
1776
1777 mvm_sta->deflink.sta_id = sta_id;
1778 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink);
1779
1780 if (!mvm->trans->trans_cfg->gen2)
1781 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1782 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1783 else
1784 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1785 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1786 }
1787
1788 mvm_sta->tt_tx_protection = false;
1789 mvm_sta->sta_type = sta_type;
1790
1791 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1792
1793 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1794 /*
1795 * Mark all queues for this STA as unallocated and defer TX
1796 * frames until the queue is allocated
1797 */
1798 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1799 }
1800
1801 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1802 struct iwl_mvm_txq *mvmtxq =
1803 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1804
1805 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1806 INIT_LIST_HEAD(&mvmtxq->list);
1807 atomic_set(&mvmtxq->tx_request, 0);
1808 }
1809
1810 if (iwl_mvm_has_new_rx_api(mvm)) {
1811 int q;
1812
1813 dup_data = kcalloc(mvm->trans->num_rx_queues,
1814 sizeof(*dup_data), GFP_KERNEL);
1815 if (!dup_data)
1816 return -ENOMEM;
1817 /*
1818 * Initialize all the last_seq values to 0xffff which can never
1819 * compare equal to the frame's seq_ctrl in the check in
1820 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1821 * number and fragmented packets don't reach that function.
1822 *
1823 * This thus allows receiving a packet with seqno 0 and the
1824 * retry bit set as the very first packet on a new TID.
1825 */
1826 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1827 memset(dup_data[q].last_seq, 0xff,
1828 sizeof(dup_data[q].last_seq));
1829 mvm_sta->dup_data = dup_data;
1830 }
1831
1832 if (!iwl_mvm_has_new_tx_api(mvm)) {
1833 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1834 ieee80211_vif_type_p2p(vif));
1835 if (ret)
1836 return ret;
1837 }
1838
1839 /*
1840 * if rs is registered with mac80211, then "add station" will be handled
1841 * via the corresponding ops, otherwise need to notify rate scaling here
1842 */
1843 if (iwl_mvm_has_tlc_offload(mvm))
1844 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1845 else
1846 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock);
1847
1848 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1849
1850 /* MPDUs are counted only when EMLSR is possible */
1851 if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
1852 !sta->tdls && ieee80211_vif_is_mld(vif)) {
1853 mvm_sta->mpdu_counters =
1854 kcalloc(mvm->trans->num_rx_queues,
1855 sizeof(*mvm_sta->mpdu_counters),
1856 GFP_KERNEL);
1857 if (mvm_sta->mpdu_counters)
1858 for (int q = 0; q < mvm->trans->num_rx_queues; q++)
1859 spin_lock_init(&mvm_sta->mpdu_counters[q].lock);
1860 }
1861
1862 return 0;
1863 }
1864
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1865 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1866 struct ieee80211_vif *vif,
1867 struct ieee80211_sta *sta)
1868 {
1869 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1870 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1871 int ret, sta_id;
1872 bool sta_update = false;
1873 unsigned int sta_flags = 0;
1874
1875 lockdep_assert_held(&mvm->mutex);
1876
1877 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1878 sta_id = iwl_mvm_find_free_sta_id(mvm,
1879 ieee80211_vif_type_p2p(vif));
1880 else
1881 sta_id = mvm_sta->deflink.sta_id;
1882
1883 if (sta_id == IWL_MVM_INVALID_STA)
1884 return -ENOSPC;
1885
1886 spin_lock_init(&mvm_sta->lock);
1887
1888 /* if this is a HW restart re-alloc existing queues */
1889 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1890 struct iwl_mvm_int_sta tmp_sta = {
1891 .sta_id = sta_id,
1892 .type = mvm_sta->sta_type,
1893 };
1894
1895 /* First add an empty station since allocating
1896 * a queue requires a valid station
1897 */
1898 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1899 mvmvif->id, mvmvif->color);
1900 if (ret)
1901 goto err;
1902
1903 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1904 sta_update = true;
1905 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1906 goto update_fw;
1907 }
1908
1909 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id,
1910 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK);
1911 if (ret)
1912 goto err;
1913
1914 update_fw:
1915 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1916 if (ret)
1917 goto err;
1918
1919 if (vif->type == NL80211_IFTYPE_STATION) {
1920 if (!sta->tdls) {
1921 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA);
1922 mvmvif->deflink.ap_sta_id = sta_id;
1923 } else {
1924 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_MVM_INVALID_STA);
1925 }
1926 }
1927
1928 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1929
1930 return 0;
1931
1932 err:
1933 return ret;
1934 }
1935
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1936 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1937 bool drain)
1938 {
1939 struct iwl_mvm_add_sta_cmd cmd = {};
1940 int ret;
1941 u32 status;
1942
1943 lockdep_assert_held(&mvm->mutex);
1944
1945 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1946 cmd.sta_id = mvmsta->deflink.sta_id;
1947 cmd.add_modify = STA_MODE_MODIFY;
1948 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1949 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1950
1951 status = ADD_STA_SUCCESS;
1952 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1953 iwl_mvm_add_sta_cmd_size(mvm),
1954 &cmd, &status);
1955 if (ret)
1956 return ret;
1957
1958 switch (status & IWL_ADD_STA_STATUS_MASK) {
1959 case ADD_STA_SUCCESS:
1960 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1961 mvmsta->deflink.sta_id);
1962 break;
1963 default:
1964 ret = -EIO;
1965 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1966 mvmsta->deflink.sta_id);
1967 break;
1968 }
1969
1970 return ret;
1971 }
1972
1973 /*
1974 * Remove a station from the FW table. Before sending the command to remove
1975 * the station validate that the station is indeed known to the driver (sanity
1976 * only).
1977 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1978 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1979 {
1980 struct ieee80211_sta *sta;
1981 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1982 .sta_id = sta_id,
1983 };
1984 int ret;
1985
1986 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1987 lockdep_is_held(&mvm->mutex));
1988
1989 /* Note: internal stations are marked as error values */
1990 if (!sta) {
1991 IWL_ERR(mvm, "Invalid station id\n");
1992 return -EINVAL;
1993 }
1994
1995 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1996 sizeof(rm_sta_cmd), &rm_sta_cmd);
1997 if (ret) {
1998 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1999 return ret;
2000 }
2001
2002 return 0;
2003 }
2004
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2005 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
2006 struct ieee80211_vif *vif,
2007 struct ieee80211_sta *sta)
2008 {
2009 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2010 int i;
2011
2012 lockdep_assert_held(&mvm->mutex);
2013
2014 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2015 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
2016 continue;
2017
2018 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id,
2019 &mvm_sta->tid_data[i].txq_id, i);
2020 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
2021 }
2022
2023 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
2024 struct iwl_mvm_txq *mvmtxq =
2025 iwl_mvm_txq_from_mac80211(sta->txq[i]);
2026
2027 spin_lock_bh(&mvm->add_stream_lock);
2028 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
2029 list_del_init(&mvmtxq->list);
2030 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
2031 spin_unlock_bh(&mvm->add_stream_lock);
2032 }
2033 }
2034
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)2035 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
2036 struct iwl_mvm_sta *mvm_sta)
2037 {
2038 int i;
2039
2040 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2041 u16 txq_id;
2042 int ret;
2043
2044 spin_lock_bh(&mvm_sta->lock);
2045 txq_id = mvm_sta->tid_data[i].txq_id;
2046 spin_unlock_bh(&mvm_sta->lock);
2047
2048 if (txq_id == IWL_MVM_INVALID_QUEUE)
2049 continue;
2050
2051 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2052 if (ret)
2053 return ret;
2054 }
2055
2056 return 0;
2057 }
2058
2059 /* Execute the common part for both MLD and non-MLD modes.
2060 * Returns if we're done with removing the station, either
2061 * with error or success
2062 */
iwl_mvm_sta_del(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_link_sta * link_sta,int * ret)2063 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2064 struct ieee80211_sta *sta,
2065 struct ieee80211_link_sta *link_sta, int *ret)
2066 {
2067 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2068 struct iwl_mvm_vif_link_info *mvm_link =
2069 mvmvif->link[link_sta->link_id];
2070 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2071 struct iwl_mvm_link_sta *mvm_link_sta;
2072 u8 sta_id;
2073
2074 lockdep_assert_held(&mvm->mutex);
2075
2076 mvm_link_sta =
2077 rcu_dereference_protected(mvm_sta->link[link_sta->link_id],
2078 lockdep_is_held(&mvm->mutex));
2079 sta_id = mvm_link_sta->sta_id;
2080
2081 /* If there is a TXQ still marked as reserved - free it */
2082 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
2083 u8 reserved_txq = mvm_sta->reserved_queue;
2084 enum iwl_mvm_queue_status *status;
2085
2086 /*
2087 * If no traffic has gone through the reserved TXQ - it
2088 * is still marked as IWL_MVM_QUEUE_RESERVED, and
2089 * should be manually marked as free again
2090 */
2091 status = &mvm->queue_info[reserved_txq].status;
2092 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2093 (*status != IWL_MVM_QUEUE_FREE),
2094 "sta_id %d reserved txq %d status %d",
2095 sta_id, reserved_txq, *status)) {
2096 *ret = -EINVAL;
2097 return true;
2098 }
2099
2100 *status = IWL_MVM_QUEUE_FREE;
2101 }
2102
2103 if (vif->type == NL80211_IFTYPE_STATION &&
2104 mvm_link->ap_sta_id == sta_id) {
2105 /* if associated - we can't remove the AP STA now */
2106 if (vif->cfg.assoc)
2107 return true;
2108
2109 /* first remove remaining keys */
2110 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0);
2111
2112 /* unassoc - go ahead - remove the AP STA now */
2113 mvm_link->ap_sta_id = IWL_MVM_INVALID_STA;
2114 }
2115
2116 /*
2117 * This shouldn't happen - the TDLS channel switch should be canceled
2118 * before the STA is removed.
2119 */
2120 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2121 mvm->tdls_cs.peer.sta_id = IWL_MVM_INVALID_STA;
2122 cancel_delayed_work(&mvm->tdls_cs.dwork);
2123 }
2124
2125 return false;
2126 }
2127
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2128 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
2129 struct ieee80211_vif *vif,
2130 struct ieee80211_sta *sta)
2131 {
2132 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2133 int ret;
2134
2135 lockdep_assert_held(&mvm->mutex);
2136
2137 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
2138 if (ret)
2139 return ret;
2140
2141 /* flush its queues here since we are freeing mvm_sta */
2142 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
2143 mvm_sta->tfd_queue_msk);
2144 if (ret)
2145 return ret;
2146 if (iwl_mvm_has_new_tx_api(mvm)) {
2147 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
2148 } else {
2149 u32 q_mask = mvm_sta->tfd_queue_msk;
2150
2151 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2152 q_mask);
2153 }
2154 if (ret)
2155 return ret;
2156
2157 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
2158
2159 iwl_mvm_disable_sta_queues(mvm, vif, sta);
2160
2161 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret))
2162 return ret;
2163
2164 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
2165 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
2166
2167 return ret;
2168 }
2169
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)2170 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2171 struct ieee80211_vif *vif,
2172 u8 sta_id)
2173 {
2174 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2175
2176 lockdep_assert_held(&mvm->mutex);
2177
2178 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2179 return ret;
2180 }
2181
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,u8 type)2182 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2183 struct iwl_mvm_int_sta *sta,
2184 u32 qmask, enum nl80211_iftype iftype,
2185 u8 type)
2186 {
2187 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2188 sta->sta_id == IWL_MVM_INVALID_STA) {
2189 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2190 if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_INVALID_STA))
2191 return -ENOSPC;
2192 }
2193
2194 sta->tfd_queue_msk = qmask;
2195 sta->type = type;
2196
2197 /* put a non-NULL value so iterating over the stations won't stop */
2198 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2199 return 0;
2200 }
2201
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)2202 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2203 {
2204 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2205 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2206 sta->sta_id = IWL_MVM_INVALID_STA;
2207 }
2208
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)2209 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2210 u8 sta_id, u8 fifo)
2211 {
2212 unsigned int wdg_timeout =
2213 mvm->trans->trans_cfg->base_params->wd_timeout;
2214 struct iwl_trans_txq_scd_cfg cfg = {
2215 .fifo = fifo,
2216 .sta_id = sta_id,
2217 .tid = IWL_MAX_TID_COUNT,
2218 .aggregate = false,
2219 .frame_limit = IWL_FRAME_LIMIT,
2220 };
2221
2222 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2223
2224 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2225 }
2226
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2227 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2228 {
2229 unsigned int wdg_timeout =
2230 mvm->trans->trans_cfg->base_params->wd_timeout;
2231
2232 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2233
2234 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT,
2235 wdg_timeout);
2236 }
2237
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)2238 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2239 int maccolor, u8 *addr,
2240 struct iwl_mvm_int_sta *sta,
2241 u16 *queue, int fifo)
2242 {
2243 int ret;
2244
2245 /* Map queue to fifo - needs to happen before adding station */
2246 if (!iwl_mvm_has_new_tx_api(mvm))
2247 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2248
2249 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2250 if (ret) {
2251 if (!iwl_mvm_has_new_tx_api(mvm))
2252 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2253 IWL_MAX_TID_COUNT);
2254 return ret;
2255 }
2256
2257 /*
2258 * For 22000 firmware and on we cannot add queue to a station unknown
2259 * to firmware so enable queue here - after the station was added
2260 */
2261 if (iwl_mvm_has_new_tx_api(mvm)) {
2262 int txq;
2263
2264 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2265 if (txq < 0) {
2266 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2267 return txq;
2268 }
2269
2270 *queue = txq;
2271 }
2272
2273 return 0;
2274 }
2275
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2276 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2277 {
2278 int ret;
2279 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
2280 BIT(mvm->aux_queue);
2281
2282 lockdep_assert_held(&mvm->mutex);
2283
2284 /* Allocate aux station and assign to it the aux queue */
2285 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
2286 NL80211_IFTYPE_UNSPECIFIED,
2287 IWL_STA_AUX_ACTIVITY);
2288 if (ret)
2289 return ret;
2290
2291 /*
2292 * In CDB NICs we need to specify which lmac to use for aux activity
2293 * using the mac_id argument place to send lmac_id to the function
2294 */
2295 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2296 &mvm->aux_sta, &mvm->aux_queue,
2297 IWL_MVM_TX_FIFO_MCAST);
2298 if (ret) {
2299 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2300 return ret;
2301 }
2302
2303 return 0;
2304 }
2305
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2306 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2307 {
2308 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2309
2310 lockdep_assert_held(&mvm->mutex);
2311
2312 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2313 NULL, &mvm->snif_sta,
2314 &mvm->snif_queue,
2315 IWL_MVM_TX_FIFO_BE);
2316 }
2317
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2318 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2319 {
2320 int ret;
2321
2322 lockdep_assert_held(&mvm->mutex);
2323
2324 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_MVM_INVALID_STA))
2325 return -EINVAL;
2326
2327 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2328 &mvm->snif_queue, IWL_MAX_TID_COUNT);
2329 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2330 if (ret)
2331 IWL_WARN(mvm, "Failed sending remove station\n");
2332
2333 return ret;
2334 }
2335
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2336 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2337 {
2338 int ret;
2339
2340 lockdep_assert_held(&mvm->mutex);
2341
2342 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_MVM_INVALID_STA))
2343 return -EINVAL;
2344
2345 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2346 &mvm->aux_queue, IWL_MAX_TID_COUNT);
2347 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2348 if (ret)
2349 IWL_WARN(mvm, "Failed sending remove station\n");
2350 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2351
2352 return ret;
2353 }
2354
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2355 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2356 {
2357 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2358 }
2359
2360 /*
2361 * Send the add station command for the vif's broadcast station.
2362 * Assumes that the station was already allocated.
2363 *
2364 * @mvm: the mvm component
2365 * @vif: the interface to which the broadcast station is added
2366 * @bsta: the broadcast station to add.
2367 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2368 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2369 {
2370 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2371 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2372 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2373 const u8 *baddr = _baddr;
2374 int queue;
2375 int ret;
2376 unsigned int wdg_timeout =
2377 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2378 struct iwl_trans_txq_scd_cfg cfg = {
2379 .fifo = IWL_MVM_TX_FIFO_VO,
2380 .sta_id = mvmvif->deflink.bcast_sta.sta_id,
2381 .tid = IWL_MAX_TID_COUNT,
2382 .aggregate = false,
2383 .frame_limit = IWL_FRAME_LIMIT,
2384 };
2385
2386 lockdep_assert_held(&mvm->mutex);
2387
2388 if (!iwl_mvm_has_new_tx_api(mvm)) {
2389 if (vif->type == NL80211_IFTYPE_AP ||
2390 vif->type == NL80211_IFTYPE_ADHOC) {
2391 queue = mvm->probe_queue;
2392 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2393 queue = mvm->p2p_dev_queue;
2394 } else {
2395 WARN(1, "Missing required TXQ for adding bcast STA\n");
2396 return -EINVAL;
2397 }
2398
2399 bsta->tfd_queue_msk |= BIT(queue);
2400
2401 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2402 }
2403
2404 if (vif->type == NL80211_IFTYPE_ADHOC)
2405 baddr = vif->bss_conf.bssid;
2406
2407 if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_INVALID_STA))
2408 return -ENOSPC;
2409
2410 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2411 mvmvif->id, mvmvif->color);
2412 if (ret)
2413 return ret;
2414
2415 /*
2416 * For 22000 firmware and on we cannot add queue to a station unknown
2417 * to firmware so enable queue here - after the station was added
2418 */
2419 if (iwl_mvm_has_new_tx_api(mvm)) {
2420 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id,
2421 IWL_MAX_TID_COUNT,
2422 wdg_timeout);
2423 if (queue < 0) {
2424 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2425 return queue;
2426 }
2427
2428 if (vif->type == NL80211_IFTYPE_AP ||
2429 vif->type == NL80211_IFTYPE_ADHOC) {
2430 /* for queue management */
2431 mvm->probe_queue = queue;
2432 /* for use in TX */
2433 mvmvif->deflink.mgmt_queue = queue;
2434 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2435 mvm->p2p_dev_queue = queue;
2436 }
2437 } else if (vif->type == NL80211_IFTYPE_AP ||
2438 vif->type == NL80211_IFTYPE_ADHOC) {
2439 /* set it for use in TX */
2440 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2441 }
2442
2443 return 0;
2444 }
2445
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2446 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2447 struct ieee80211_vif *vif)
2448 {
2449 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2450 u16 *queueptr, queue;
2451
2452 lockdep_assert_held(&mvm->mutex);
2453
2454 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
2455 mvmvif->deflink.bcast_sta.tfd_queue_msk);
2456
2457 switch (vif->type) {
2458 case NL80211_IFTYPE_AP:
2459 case NL80211_IFTYPE_ADHOC:
2460 queueptr = &mvm->probe_queue;
2461 break;
2462 case NL80211_IFTYPE_P2P_DEVICE:
2463 queueptr = &mvm->p2p_dev_queue;
2464 break;
2465 default:
2466 WARN(1, "Can't free bcast queue on vif type %d\n",
2467 vif->type);
2468 return;
2469 }
2470
2471 queue = *queueptr;
2472 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id,
2473 queueptr, IWL_MAX_TID_COUNT);
2474
2475 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC)
2476 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2477
2478 if (iwl_mvm_has_new_tx_api(mvm))
2479 return;
2480
2481 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue)));
2482 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue);
2483 }
2484
2485 /* Send the FW a request to remove the station from it's internal data
2486 * 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)2487 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2488 {
2489 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2490 int ret;
2491
2492 lockdep_assert_held(&mvm->mutex);
2493
2494 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2495
2496 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id);
2497 if (ret)
2498 IWL_WARN(mvm, "Failed sending remove station\n");
2499 return ret;
2500 }
2501
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2502 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2503 {
2504 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2505
2506 lockdep_assert_held(&mvm->mutex);
2507
2508 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0,
2509 ieee80211_vif_type_p2p(vif),
2510 IWL_STA_GENERAL_PURPOSE);
2511 }
2512
2513 /* Allocate a new station entry for the broadcast station to the given vif,
2514 * and send it to the FW.
2515 * Note that each P2P mac should have its own broadcast station.
2516 *
2517 * @mvm: the mvm component
2518 * @vif: the interface to which the broadcast station is added
2519 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2520 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2521 {
2522 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2523 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2524 int ret;
2525
2526 lockdep_assert_held(&mvm->mutex);
2527
2528 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2529 if (ret)
2530 return ret;
2531
2532 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2533
2534 if (ret)
2535 iwl_mvm_dealloc_int_sta(mvm, bsta);
2536
2537 return ret;
2538 }
2539
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2540 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2541 {
2542 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2543
2544 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta);
2545 }
2546
2547 /*
2548 * Send the FW a request to remove the station from it's internal data
2549 * structures, and in addition remove it from the local data structure.
2550 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2551 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2552 {
2553 int ret;
2554
2555 lockdep_assert_held(&mvm->mutex);
2556
2557 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2558
2559 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2560
2561 return ret;
2562 }
2563
2564 /*
2565 * Allocate a new station entry for the multicast station to the given vif,
2566 * and send it to the FW.
2567 * Note that each AP/GO mac should have its own multicast station.
2568 *
2569 * @mvm: the mvm component
2570 * @vif: the interface to which the multicast station is added
2571 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2572 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2573 {
2574 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2575 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta;
2576 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2577 const u8 *maddr = _maddr;
2578 struct iwl_trans_txq_scd_cfg cfg = {
2579 .fifo = vif->type == NL80211_IFTYPE_AP ?
2580 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2581 .sta_id = msta->sta_id,
2582 .tid = 0,
2583 .aggregate = false,
2584 .frame_limit = IWL_FRAME_LIMIT,
2585 };
2586 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif, false, false);
2587 int ret;
2588
2589 lockdep_assert_held(&mvm->mutex);
2590
2591 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2592 vif->type != NL80211_IFTYPE_ADHOC))
2593 return -EOPNOTSUPP;
2594
2595 /*
2596 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2597 * invalid, so make sure we use the queue we want.
2598 * Note that this is done here as we want to avoid making DQA
2599 * changes in mac80211 layer.
2600 */
2601 if (vif->type == NL80211_IFTYPE_ADHOC)
2602 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2603
2604 /*
2605 * While in previous FWs we had to exclude cab queue from TFD queue
2606 * mask, now it is needed as any other queue.
2607 */
2608 if (!iwl_mvm_has_new_tx_api(mvm) &&
2609 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2610 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2611 &cfg,
2612 timeout);
2613 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue);
2614 }
2615 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2616 mvmvif->id, mvmvif->color);
2617 if (ret)
2618 goto err;
2619
2620 /*
2621 * Enable cab queue after the ADD_STA command is sent.
2622 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2623 * command with unknown station id, and for FW that doesn't support
2624 * station API since the cab queue is not included in the
2625 * tfd_queue_mask.
2626 */
2627 if (iwl_mvm_has_new_tx_api(mvm)) {
2628 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id,
2629 0, timeout);
2630 if (queue < 0) {
2631 ret = queue;
2632 goto err;
2633 }
2634 mvmvif->deflink.cab_queue = queue;
2635 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2636 IWL_UCODE_TLV_API_STA_TYPE))
2637 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2638 &cfg,
2639 timeout);
2640
2641 return 0;
2642 err:
2643 iwl_mvm_dealloc_int_sta(mvm, msta);
2644 return ret;
2645 }
2646
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2647 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2648 struct ieee80211_key_conf *keyconf,
2649 bool mcast)
2650 {
2651 union {
2652 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2653 struct iwl_mvm_add_sta_key_cmd cmd;
2654 } u = {};
2655 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2656 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2657 __le16 key_flags;
2658 int ret, size;
2659 u32 status;
2660
2661 /* This is a valid situation for GTK removal */
2662 if (sta_id == IWL_MVM_INVALID_STA)
2663 return 0;
2664
2665 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2666 STA_KEY_FLG_KEYID_MSK);
2667 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2668 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2669
2670 if (mcast)
2671 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2672
2673 /*
2674 * The fields assigned here are in the same location at the start
2675 * of the command, so we can do this union trick.
2676 */
2677 u.cmd.common.key_flags = key_flags;
2678 u.cmd.common.key_offset = keyconf->hw_key_idx;
2679 u.cmd.common.sta_id = sta_id;
2680
2681 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2682
2683 status = ADD_STA_SUCCESS;
2684 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2685 &status);
2686
2687 switch (status) {
2688 case ADD_STA_SUCCESS:
2689 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2690 break;
2691 default:
2692 ret = -EIO;
2693 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2694 break;
2695 }
2696
2697 return ret;
2698 }
2699
2700 /*
2701 * Send the FW a request to remove the station from it's internal data
2702 * structures, and in addition remove it from the local data structure.
2703 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2704 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2705 {
2706 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2707 int ret;
2708
2709 lockdep_assert_held(&mvm->mutex);
2710
2711 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id,
2712 mvmvif->deflink.mcast_sta.tfd_queue_msk);
2713
2714 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id,
2715 &mvmvif->deflink.cab_queue, 0);
2716
2717 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id);
2718 if (ret)
2719 IWL_WARN(mvm, "Failed sending remove station\n");
2720
2721 return ret;
2722 }
2723
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2724 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2725 {
2726 struct iwl_mvm_delba_data notif = {
2727 .baid = baid,
2728 };
2729
2730 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2731 ¬if, sizeof(notif));
2732 };
2733
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2734 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2735 struct iwl_mvm_baid_data *data)
2736 {
2737 int i;
2738
2739 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2740
2741 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2742 int j;
2743 struct iwl_mvm_reorder_buffer *reorder_buf =
2744 &data->reorder_buf[i];
2745 struct iwl_mvm_reorder_buf_entry *entries =
2746 &data->entries[i * data->entries_per_queue];
2747
2748 spin_lock_bh(&reorder_buf->lock);
2749 if (likely(!reorder_buf->num_stored)) {
2750 spin_unlock_bh(&reorder_buf->lock);
2751 continue;
2752 }
2753
2754 /*
2755 * This shouldn't happen in regular DELBA since the internal
2756 * delBA notification should trigger a release of all frames in
2757 * the reorder buffer.
2758 */
2759 WARN_ON(1);
2760
2761 for (j = 0; j < reorder_buf->buf_size; j++)
2762 __skb_queue_purge(&entries[j].frames);
2763
2764 spin_unlock_bh(&reorder_buf->lock);
2765 }
2766 }
2767
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn,u16 buf_size)2768 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2769 struct iwl_mvm_baid_data *data,
2770 u16 ssn, u16 buf_size)
2771 {
2772 int i;
2773
2774 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2775 struct iwl_mvm_reorder_buffer *reorder_buf =
2776 &data->reorder_buf[i];
2777 struct iwl_mvm_reorder_buf_entry *entries =
2778 &data->entries[i * data->entries_per_queue];
2779 int j;
2780
2781 reorder_buf->num_stored = 0;
2782 reorder_buf->head_sn = ssn;
2783 reorder_buf->buf_size = buf_size;
2784 spin_lock_init(&reorder_buf->lock);
2785 reorder_buf->mvm = mvm;
2786 reorder_buf->queue = i;
2787 reorder_buf->valid = false;
2788 for (j = 0; j < reorder_buf->buf_size; j++)
2789 __skb_queue_head_init(&entries[j].frames);
2790 }
2791 }
2792
iwl_mvm_fw_baid_op_sta(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size)2793 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2794 struct ieee80211_sta *sta,
2795 bool start, int tid, u16 ssn,
2796 u16 buf_size)
2797 {
2798 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2799 struct iwl_mvm_add_sta_cmd cmd = {
2800 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2801 .sta_id = mvm_sta->deflink.sta_id,
2802 .add_modify = STA_MODE_MODIFY,
2803 };
2804 u32 status;
2805 int ret;
2806
2807 if (start) {
2808 cmd.add_immediate_ba_tid = tid;
2809 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2810 cmd.rx_ba_window = cpu_to_le16(buf_size);
2811 cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2812 } else {
2813 cmd.remove_immediate_ba_tid = tid;
2814 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2815 }
2816
2817 status = ADD_STA_SUCCESS;
2818 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2819 iwl_mvm_add_sta_cmd_size(mvm),
2820 &cmd, &status);
2821 if (ret)
2822 return ret;
2823
2824 switch (status & IWL_ADD_STA_STATUS_MASK) {
2825 case ADD_STA_SUCCESS:
2826 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2827 start ? "start" : "stopp");
2828 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2829 !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2830 return -EINVAL;
2831 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2832 case ADD_STA_IMMEDIATE_BA_FAILURE:
2833 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2834 return -ENOSPC;
2835 default:
2836 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2837 start ? "start" : "stopp", status);
2838 return -EIO;
2839 }
2840 }
2841
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)2842 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2843 struct ieee80211_sta *sta,
2844 bool start, int tid, u16 ssn,
2845 u16 buf_size, int baid)
2846 {
2847 struct iwl_rx_baid_cfg_cmd cmd = {
2848 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2849 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2850 };
2851 struct iwl_host_cmd hcmd = {
2852 .id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD),
2853 .flags = CMD_SEND_IN_RFKILL,
2854 .len[0] = sizeof(cmd),
2855 .data[0] = &cmd,
2856 };
2857 int ret;
2858
2859 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2860
2861 if (start) {
2862 cmd.alloc.sta_id_mask =
2863 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2864 cmd.alloc.tid = tid;
2865 cmd.alloc.ssn = cpu_to_le16(ssn);
2866 cmd.alloc.win_size = cpu_to_le16(buf_size);
2867 baid = -EIO;
2868 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 1) == 1) {
2869 cmd.remove_v1.baid = cpu_to_le32(baid);
2870 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2871 } else {
2872 cmd.remove.sta_id_mask =
2873 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2874 cmd.remove.tid = cpu_to_le32(tid);
2875 }
2876
2877 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &baid);
2878 if (ret)
2879 return ret;
2880
2881 if (!start) {
2882 /* ignore firmware baid on remove */
2883 baid = 0;
2884 }
2885
2886 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2887 start ? "start" : "stopp");
2888
2889 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2890 return -EINVAL;
2891
2892 return baid;
2893 }
2894
iwl_mvm_fw_baid_op(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2895 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2896 bool start, int tid, u16 ssn, u16 buf_size,
2897 int baid)
2898 {
2899 if (fw_has_capa(&mvm->fw->ucode_capa,
2900 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2901 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start,
2902 tid, ssn, buf_size, baid);
2903
2904 return iwl_mvm_fw_baid_op_sta(mvm, sta, start,
2905 tid, ssn, buf_size);
2906 }
2907
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2908 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2909 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2910 {
2911 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2912 struct iwl_mvm_baid_data *baid_data = NULL;
2913 int ret, baid;
2914 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2915 IWL_MAX_BAID_OLD;
2916
2917 lockdep_assert_held(&mvm->mutex);
2918
2919 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2920 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2921 return -ENOSPC;
2922 }
2923
2924 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2925 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2926
2927 /* sparse doesn't like the __align() so don't check */
2928 #ifndef __CHECKER__
2929 /*
2930 * The division below will be OK if either the cache line size
2931 * can be divided by the entry size (ALIGN will round up) or if
2932 * if the entry size can be divided by the cache line size, in
2933 * which case the ALIGN() will do nothing.
2934 */
2935 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2936 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2937 #endif
2938
2939 /*
2940 * Upward align the reorder buffer size to fill an entire cache
2941 * line for each queue, to avoid sharing cache lines between
2942 * different queues.
2943 */
2944 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2945
2946 /*
2947 * Allocate here so if allocation fails we can bail out early
2948 * before starting the BA session in the firmware
2949 */
2950 baid_data = kzalloc(sizeof(*baid_data) +
2951 mvm->trans->num_rx_queues *
2952 reorder_buf_size,
2953 GFP_KERNEL);
2954 if (!baid_data)
2955 return -ENOMEM;
2956
2957 /*
2958 * This division is why we need the above BUILD_BUG_ON(),
2959 * if that doesn't hold then this will not be right.
2960 */
2961 baid_data->entries_per_queue =
2962 reorder_buf_size / sizeof(baid_data->entries[0]);
2963 }
2964
2965 if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2966 baid = mvm_sta->tid_to_baid[tid];
2967 } else {
2968 /* we don't really need it in this case */
2969 baid = -1;
2970 }
2971
2972 /* Don't send command to remove (start=0) BAID during restart */
2973 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2974 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size,
2975 baid);
2976
2977 if (baid < 0) {
2978 ret = baid;
2979 goto out_free;
2980 }
2981
2982 if (start) {
2983 mvm->rx_ba_sessions++;
2984
2985 if (!iwl_mvm_has_new_rx_api(mvm))
2986 return 0;
2987
2988 baid_data->baid = baid;
2989 baid_data->timeout = timeout;
2990 baid_data->last_rx = jiffies;
2991 baid_data->rcu_ptr = &mvm->baid_map[baid];
2992 timer_setup(&baid_data->session_timer,
2993 iwl_mvm_rx_agg_session_expired, 0);
2994 baid_data->mvm = mvm;
2995 baid_data->tid = tid;
2996 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
2997
2998 mvm_sta->tid_to_baid[tid] = baid;
2999 if (timeout)
3000 mod_timer(&baid_data->session_timer,
3001 TU_TO_EXP_TIME(timeout * 2));
3002
3003 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn, buf_size);
3004 /*
3005 * protect the BA data with RCU to cover a case where our
3006 * internal RX sync mechanism will timeout (not that it's
3007 * supposed to happen) and we will free the session data while
3008 * RX is being processed in parallel
3009 */
3010 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
3011 mvm_sta->deflink.sta_id, tid, baid);
3012 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
3013 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
3014 } else {
3015 baid = mvm_sta->tid_to_baid[tid];
3016
3017 if (mvm->rx_ba_sessions > 0)
3018 /* check that restart flow didn't zero the counter */
3019 mvm->rx_ba_sessions--;
3020 if (!iwl_mvm_has_new_rx_api(mvm))
3021 return 0;
3022
3023 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
3024 return -EINVAL;
3025
3026 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
3027 if (WARN_ON(!baid_data))
3028 return -EINVAL;
3029
3030 /* synchronize all rx queues so we can safely delete */
3031 iwl_mvm_free_reorder(mvm, baid_data);
3032 timer_shutdown_sync(&baid_data->session_timer);
3033 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
3034 kfree_rcu(baid_data, rcu_head);
3035 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
3036 }
3037 return 0;
3038
3039 out_free:
3040 kfree(baid_data);
3041 return ret;
3042 }
3043
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)3044 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3045 int tid, u8 queue, bool start)
3046 {
3047 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3048 struct iwl_mvm_add_sta_cmd cmd = {};
3049 int ret;
3050 u32 status;
3051
3052 lockdep_assert_held(&mvm->mutex);
3053
3054 if (start) {
3055 mvm_sta->tfd_queue_msk |= BIT(queue);
3056 mvm_sta->tid_disable_agg &= ~BIT(tid);
3057 } else {
3058 /* In DQA-mode the queue isn't removed on agg termination */
3059 mvm_sta->tid_disable_agg |= BIT(tid);
3060 }
3061
3062 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
3063 cmd.sta_id = mvm_sta->deflink.sta_id;
3064 cmd.add_modify = STA_MODE_MODIFY;
3065 if (!iwl_mvm_has_new_tx_api(mvm))
3066 cmd.modify_mask = STA_MODIFY_QUEUES;
3067 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
3068 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
3069 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
3070
3071 status = ADD_STA_SUCCESS;
3072 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
3073 iwl_mvm_add_sta_cmd_size(mvm),
3074 &cmd, &status);
3075 if (ret)
3076 return ret;
3077
3078 switch (status & IWL_ADD_STA_STATUS_MASK) {
3079 case ADD_STA_SUCCESS:
3080 break;
3081 default:
3082 ret = -EIO;
3083 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
3084 start ? "start" : "stopp", status);
3085 break;
3086 }
3087
3088 return ret;
3089 }
3090
3091 const u8 tid_to_mac80211_ac[] = {
3092 IEEE80211_AC_BE,
3093 IEEE80211_AC_BK,
3094 IEEE80211_AC_BK,
3095 IEEE80211_AC_BE,
3096 IEEE80211_AC_VI,
3097 IEEE80211_AC_VI,
3098 IEEE80211_AC_VO,
3099 IEEE80211_AC_VO,
3100 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
3101 };
3102
3103 static const u8 tid_to_ucode_ac[] = {
3104 AC_BE,
3105 AC_BK,
3106 AC_BK,
3107 AC_BE,
3108 AC_VI,
3109 AC_VI,
3110 AC_VO,
3111 AC_VO,
3112 };
3113
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)3114 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3115 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3116 {
3117 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3118 struct iwl_mvm_tid_data *tid_data;
3119 u16 normalized_ssn;
3120 u16 txq_id;
3121 int ret;
3122
3123 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
3124 return -EINVAL;
3125
3126 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
3127 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
3128 IWL_ERR(mvm,
3129 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
3130 mvmsta->tid_data[tid].state);
3131 return -ENXIO;
3132 }
3133
3134 lockdep_assert_held(&mvm->mutex);
3135
3136 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
3137 iwl_mvm_has_new_tx_api(mvm)) {
3138 u8 ac = tid_to_mac80211_ac[tid];
3139
3140 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
3141 if (ret)
3142 return ret;
3143 }
3144
3145 spin_lock_bh(&mvmsta->lock);
3146
3147 /*
3148 * Note the possible cases:
3149 * 1. An enabled TXQ - TXQ needs to become agg'ed
3150 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
3151 * it as reserved
3152 */
3153 txq_id = mvmsta->tid_data[tid].txq_id;
3154 if (txq_id == IWL_MVM_INVALID_QUEUE) {
3155 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
3156 IWL_MVM_DQA_MIN_DATA_QUEUE,
3157 IWL_MVM_DQA_MAX_DATA_QUEUE);
3158 if (ret < 0) {
3159 IWL_ERR(mvm, "Failed to allocate agg queue\n");
3160 goto out;
3161 }
3162
3163 txq_id = ret;
3164
3165 /* TXQ hasn't yet been enabled, so mark it only as reserved */
3166 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
3167 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
3168 ret = -ENXIO;
3169 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
3170 tid, IWL_MAX_HW_QUEUES - 1);
3171 goto out;
3172
3173 } else if (unlikely(mvm->queue_info[txq_id].status ==
3174 IWL_MVM_QUEUE_SHARED)) {
3175 ret = -ENXIO;
3176 IWL_DEBUG_TX_QUEUES(mvm,
3177 "Can't start tid %d agg on shared queue!\n",
3178 tid);
3179 goto out;
3180 }
3181
3182 IWL_DEBUG_TX_QUEUES(mvm,
3183 "AGG for tid %d will be on queue #%d\n",
3184 tid, txq_id);
3185
3186 tid_data = &mvmsta->tid_data[tid];
3187 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3188 tid_data->txq_id = txq_id;
3189 *ssn = tid_data->ssn;
3190
3191 IWL_DEBUG_TX_QUEUES(mvm,
3192 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3193 mvmsta->deflink.sta_id, tid, txq_id,
3194 tid_data->ssn,
3195 tid_data->next_reclaimed);
3196
3197 /*
3198 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3199 * to align the wrap around of ssn so we compare relevant values.
3200 */
3201 normalized_ssn = tid_data->ssn;
3202 if (mvm->trans->trans_cfg->gen2)
3203 normalized_ssn &= 0xff;
3204
3205 if (normalized_ssn == tid_data->next_reclaimed) {
3206 tid_data->state = IWL_AGG_STARTING;
3207 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3208 } else {
3209 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3210 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3211 }
3212
3213 out:
3214 spin_unlock_bh(&mvmsta->lock);
3215
3216 return ret;
3217 }
3218
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)3219 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3220 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3221 bool amsdu)
3222 {
3223 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3224 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3225 unsigned int wdg_timeout =
3226 iwl_mvm_get_wd_timeout(mvm, vif, sta->tdls, false);
3227 int queue, ret;
3228 bool alloc_queue = true;
3229 enum iwl_mvm_queue_status queue_status;
3230 u16 ssn;
3231
3232 struct iwl_trans_txq_scd_cfg cfg = {
3233 .sta_id = mvmsta->deflink.sta_id,
3234 .tid = tid,
3235 .frame_limit = buf_size,
3236 .aggregate = true,
3237 };
3238
3239 /*
3240 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3241 * manager, so this function should never be called in this case.
3242 */
3243 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3244 return -EINVAL;
3245
3246 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3247 != IWL_MAX_TID_COUNT);
3248
3249 spin_lock_bh(&mvmsta->lock);
3250 ssn = tid_data->ssn;
3251 queue = tid_data->txq_id;
3252 tid_data->state = IWL_AGG_ON;
3253 mvmsta->agg_tids |= BIT(tid);
3254 tid_data->ssn = 0xffff;
3255 tid_data->amsdu_in_ampdu_allowed = amsdu;
3256 spin_unlock_bh(&mvmsta->lock);
3257
3258 if (iwl_mvm_has_new_tx_api(mvm)) {
3259 /*
3260 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3261 * would have failed, so if we are here there is no need to
3262 * allocate a queue.
3263 * However, if aggregation size is different than the default
3264 * size, the scheduler should be reconfigured.
3265 * We cannot do this with the new TX API, so return unsupported
3266 * for now, until it will be offloaded to firmware..
3267 * Note that if SCD default value changes - this condition
3268 * should be updated as well.
3269 */
3270 if (buf_size < IWL_FRAME_LIMIT)
3271 return -EOPNOTSUPP;
3272
3273 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3274 if (ret)
3275 return -EIO;
3276 goto out;
3277 }
3278
3279 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3280
3281 queue_status = mvm->queue_info[queue].status;
3282
3283 /* Maybe there is no need to even alloc a queue... */
3284 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3285 alloc_queue = false;
3286
3287 /*
3288 * Only reconfig the SCD for the queue if the window size has
3289 * changed from current (become smaller)
3290 */
3291 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3292 /*
3293 * If reconfiguring an existing queue, it first must be
3294 * drained
3295 */
3296 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3297 BIT(queue));
3298 if (ret) {
3299 IWL_ERR(mvm,
3300 "Error draining queue before reconfig\n");
3301 return ret;
3302 }
3303
3304 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3305 mvmsta->deflink.sta_id, tid,
3306 buf_size, ssn);
3307 if (ret) {
3308 IWL_ERR(mvm,
3309 "Error reconfiguring TXQ #%d\n", queue);
3310 return ret;
3311 }
3312 }
3313
3314 if (alloc_queue)
3315 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3316 &cfg, wdg_timeout);
3317
3318 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3319 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3320 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3321 if (ret)
3322 return -EIO;
3323 }
3324
3325 /* No need to mark as reserved */
3326 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3327
3328 out:
3329 /*
3330 * Even though in theory the peer could have different
3331 * aggregation reorder buffer sizes for different sessions,
3332 * our ucode doesn't allow for that and has a global limit
3333 * for each station. Therefore, use the minimum of all the
3334 * aggregation sessions and our default value.
3335 */
3336 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
3337 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize,
3338 buf_size);
3339 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit =
3340 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize;
3341
3342 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3343 sta->addr, tid);
3344
3345 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq);
3346 }
3347
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3348 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3349 struct iwl_mvm_sta *mvmsta,
3350 struct iwl_mvm_tid_data *tid_data)
3351 {
3352 u16 txq_id = tid_data->txq_id;
3353
3354 lockdep_assert_held(&mvm->mutex);
3355
3356 if (iwl_mvm_has_new_tx_api(mvm))
3357 return;
3358
3359 /*
3360 * The TXQ is marked as reserved only if no traffic came through yet
3361 * This means no traffic has been sent on this TID (agg'd or not), so
3362 * we no longer have use for the queue. Since it hasn't even been
3363 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3364 * free.
3365 */
3366 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3367 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3368 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3369 }
3370 }
3371
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3372 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3373 struct ieee80211_sta *sta, u16 tid)
3374 {
3375 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3376 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3377 u16 txq_id;
3378 int err;
3379
3380 /*
3381 * If mac80211 is cleaning its state, then say that we finished since
3382 * our state has been cleared anyway.
3383 */
3384 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3385 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3386 return 0;
3387 }
3388
3389 spin_lock_bh(&mvmsta->lock);
3390
3391 txq_id = tid_data->txq_id;
3392
3393 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3394 mvmsta->deflink.sta_id, tid, txq_id,
3395 tid_data->state);
3396
3397 mvmsta->agg_tids &= ~BIT(tid);
3398
3399 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3400
3401 switch (tid_data->state) {
3402 case IWL_AGG_ON:
3403 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3404
3405 IWL_DEBUG_TX_QUEUES(mvm,
3406 "ssn = %d, next_recl = %d\n",
3407 tid_data->ssn, tid_data->next_reclaimed);
3408
3409 tid_data->ssn = 0xffff;
3410 tid_data->state = IWL_AGG_OFF;
3411 spin_unlock_bh(&mvmsta->lock);
3412
3413 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3414
3415 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3416 return 0;
3417 case IWL_AGG_STARTING:
3418 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3419 /*
3420 * The agg session has been stopped before it was set up. This
3421 * can happen when the AddBA timer times out for example.
3422 */
3423
3424 /* No barriers since we are under mutex */
3425 lockdep_assert_held(&mvm->mutex);
3426
3427 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3428 tid_data->state = IWL_AGG_OFF;
3429 err = 0;
3430 break;
3431 default:
3432 IWL_ERR(mvm,
3433 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3434 mvmsta->deflink.sta_id, tid, tid_data->state);
3435 IWL_ERR(mvm,
3436 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3437 err = -EINVAL;
3438 }
3439
3440 spin_unlock_bh(&mvmsta->lock);
3441
3442 return err;
3443 }
3444
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3445 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3446 struct ieee80211_sta *sta, u16 tid)
3447 {
3448 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3449 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3450 u16 txq_id;
3451 enum iwl_mvm_agg_state old_state;
3452
3453 /*
3454 * First set the agg state to OFF to avoid calling
3455 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3456 */
3457 spin_lock_bh(&mvmsta->lock);
3458 txq_id = tid_data->txq_id;
3459 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3460 mvmsta->deflink.sta_id, tid, txq_id,
3461 tid_data->state);
3462 old_state = tid_data->state;
3463 tid_data->state = IWL_AGG_OFF;
3464 mvmsta->agg_tids &= ~BIT(tid);
3465 spin_unlock_bh(&mvmsta->lock);
3466
3467 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3468
3469 if (old_state >= IWL_AGG_ON) {
3470 iwl_mvm_drain_sta(mvm, mvmsta, true);
3471
3472 if (iwl_mvm_has_new_tx_api(mvm)) {
3473 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id,
3474 BIT(tid)))
3475 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3476 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3477 } else {
3478 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3479 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3480 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3481 }
3482
3483 iwl_mvm_drain_sta(mvm, mvmsta, false);
3484
3485 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3486 }
3487
3488 return 0;
3489 }
3490
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3491 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3492 {
3493 int i, max = -1, max_offs = -1;
3494
3495 lockdep_assert_held(&mvm->mutex);
3496
3497 /* Pick the unused key offset with the highest 'deleted'
3498 * counter. Every time a key is deleted, all the counters
3499 * are incremented and the one that was just deleted is
3500 * reset to zero. Thus, the highest counter is the one
3501 * that was deleted longest ago. Pick that one.
3502 */
3503 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3504 if (test_bit(i, mvm->fw_key_table))
3505 continue;
3506 if (mvm->fw_key_deleted[i] > max) {
3507 max = mvm->fw_key_deleted[i];
3508 max_offs = i;
3509 }
3510 }
3511
3512 if (max_offs < 0)
3513 return STA_KEY_IDX_INVALID;
3514
3515 return max_offs;
3516 }
3517
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3518 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3519 struct ieee80211_vif *vif,
3520 struct ieee80211_sta *sta)
3521 {
3522 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3523
3524 if (sta)
3525 return iwl_mvm_sta_from_mac80211(sta);
3526
3527 /*
3528 * The device expects GTKs for station interfaces to be
3529 * installed as GTKs for the AP station. If we have no
3530 * station ID, then use AP's station ID.
3531 */
3532 if (vif->type == NL80211_IFTYPE_STATION &&
3533 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3534 u8 sta_id = mvmvif->deflink.ap_sta_id;
3535
3536 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3537 lockdep_is_held(&mvm->mutex));
3538
3539 /*
3540 * It is possible that the 'sta' parameter is NULL,
3541 * for example when a GTK is removed - the sta_id will then
3542 * be the AP ID, and no station was passed by mac80211.
3543 */
3544 if (IS_ERR_OR_NULL(sta))
3545 return NULL;
3546
3547 return iwl_mvm_sta_from_mac80211(sta);
3548 }
3549
3550 return NULL;
3551 }
3552
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3553 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3554 {
3555 int i;
3556
3557 for (i = len - 1; i >= 0; i--) {
3558 if (pn1[i] > pn2[i])
3559 return 1;
3560 if (pn1[i] < pn2[i])
3561 return -1;
3562 }
3563
3564 return 0;
3565 }
3566
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)3567 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3568 u32 sta_id,
3569 struct ieee80211_key_conf *key, bool mcast,
3570 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3571 u8 key_offset, bool mfp)
3572 {
3573 union {
3574 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3575 struct iwl_mvm_add_sta_key_cmd cmd;
3576 } u = {};
3577 __le16 key_flags;
3578 int ret;
3579 u32 status;
3580 u16 keyidx;
3581 u64 pn = 0;
3582 int i, size;
3583 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3584 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3585 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3586 new_api ? 2 : 1);
3587
3588 if (sta_id == IWL_MVM_INVALID_STA)
3589 return -EINVAL;
3590
3591 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3592 STA_KEY_FLG_KEYID_MSK;
3593 key_flags = cpu_to_le16(keyidx);
3594 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3595
3596 if (key->flags & IEEE80211_KEY_FLAG_SPP_AMSDU)
3597 key_flags |= cpu_to_le16(STA_KEY_FLG_AMSDU_SPP);
3598
3599 switch (key->cipher) {
3600 case WLAN_CIPHER_SUITE_TKIP:
3601 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3602 if (api_ver >= 2) {
3603 memcpy((void *)&u.cmd.tx_mic_key,
3604 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3605 IWL_MIC_KEY_SIZE);
3606
3607 memcpy((void *)&u.cmd.rx_mic_key,
3608 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3609 IWL_MIC_KEY_SIZE);
3610 pn = atomic64_read(&key->tx_pn);
3611
3612 } else {
3613 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3614 for (i = 0; i < 5; i++)
3615 u.cmd_v1.tkip_rx_ttak[i] =
3616 cpu_to_le16(tkip_p1k[i]);
3617 }
3618 memcpy(u.cmd.common.key, key->key, key->keylen);
3619 break;
3620 case WLAN_CIPHER_SUITE_CCMP:
3621 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3622 memcpy(u.cmd.common.key, key->key, key->keylen);
3623 if (api_ver >= 2)
3624 pn = atomic64_read(&key->tx_pn);
3625 break;
3626 case WLAN_CIPHER_SUITE_WEP104:
3627 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3628 fallthrough;
3629 case WLAN_CIPHER_SUITE_WEP40:
3630 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3631 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3632 break;
3633 case WLAN_CIPHER_SUITE_GCMP_256:
3634 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3635 fallthrough;
3636 case WLAN_CIPHER_SUITE_GCMP:
3637 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
3638 memcpy(u.cmd.common.key, key->key, key->keylen);
3639 if (api_ver >= 2)
3640 pn = atomic64_read(&key->tx_pn);
3641 break;
3642 default:
3643 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3644 memcpy(u.cmd.common.key, key->key, key->keylen);
3645 }
3646
3647 if (mcast)
3648 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3649 if (mfp)
3650 key_flags |= cpu_to_le16(STA_KEY_MFP);
3651
3652 u.cmd.common.key_offset = key_offset;
3653 u.cmd.common.key_flags = key_flags;
3654 u.cmd.common.sta_id = sta_id;
3655
3656 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3657 i = 0;
3658 else
3659 i = -1;
3660
3661 for (; i < IEEE80211_NUM_TIDS; i++) {
3662 struct ieee80211_key_seq seq = {};
3663 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3664 int rx_pn_len = 8;
3665 /* there's a hole at 2/3 in FW format depending on version */
3666 int hole = api_ver >= 3 ? 0 : 2;
3667
3668 ieee80211_get_key_rx_seq(key, i, &seq);
3669
3670 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3671 rx_pn[0] = seq.tkip.iv16;
3672 rx_pn[1] = seq.tkip.iv16 >> 8;
3673 rx_pn[2 + hole] = seq.tkip.iv32;
3674 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3675 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3676 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3677 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3678 rx_pn = seq.hw.seq;
3679 rx_pn_len = seq.hw.seq_len;
3680 } else {
3681 rx_pn[0] = seq.ccmp.pn[0];
3682 rx_pn[1] = seq.ccmp.pn[1];
3683 rx_pn[2 + hole] = seq.ccmp.pn[2];
3684 rx_pn[3 + hole] = seq.ccmp.pn[3];
3685 rx_pn[4 + hole] = seq.ccmp.pn[4];
3686 rx_pn[5 + hole] = seq.ccmp.pn[5];
3687 }
3688
3689 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3690 rx_pn_len) > 0)
3691 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3692 rx_pn_len);
3693 }
3694
3695 if (api_ver >= 2) {
3696 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3697 size = sizeof(u.cmd);
3698 } else {
3699 size = sizeof(u.cmd_v1);
3700 }
3701
3702 status = ADD_STA_SUCCESS;
3703 if (cmd_flags & CMD_ASYNC)
3704 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3705 &u.cmd);
3706 else
3707 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3708 &u.cmd, &status);
3709
3710 switch (status) {
3711 case ADD_STA_SUCCESS:
3712 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3713 break;
3714 default:
3715 ret = -EIO;
3716 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3717 break;
3718 }
3719
3720 return ret;
3721 }
3722
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3723 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3724 struct ieee80211_key_conf *keyconf,
3725 u8 sta_id, bool remove_key)
3726 {
3727 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3728
3729 /* verify the key details match the required command's expectations */
3730 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3731 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3732 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3733 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3734 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3735 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3736 return -EINVAL;
3737
3738 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3739 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3740 return -EINVAL;
3741
3742 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3743 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3744
3745 if (remove_key) {
3746 /* This is a valid situation for IGTK */
3747 if (sta_id == IWL_MVM_INVALID_STA)
3748 return 0;
3749
3750 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3751 } else {
3752 struct ieee80211_key_seq seq;
3753 const u8 *pn;
3754
3755 switch (keyconf->cipher) {
3756 case WLAN_CIPHER_SUITE_AES_CMAC:
3757 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3758 break;
3759 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3760 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3761 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3762 break;
3763 default:
3764 return -EINVAL;
3765 }
3766
3767 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3768 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3769 igtk_cmd.ctrl_flags |=
3770 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3771 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3772 pn = seq.aes_cmac.pn;
3773 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3774 ((u64) pn[4] << 8) |
3775 ((u64) pn[3] << 16) |
3776 ((u64) pn[2] << 24) |
3777 ((u64) pn[1] << 32) |
3778 ((u64) pn[0] << 40));
3779 }
3780
3781 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3782 remove_key ? "removing" : "installing",
3783 keyconf->keyidx >= 6 ? "B" : "",
3784 keyconf->keyidx, igtk_cmd.sta_id);
3785
3786 if (!iwl_mvm_has_new_rx_api(mvm)) {
3787 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3788 .ctrl_flags = igtk_cmd.ctrl_flags,
3789 .key_id = igtk_cmd.key_id,
3790 .sta_id = igtk_cmd.sta_id,
3791 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3792 };
3793
3794 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3795 ARRAY_SIZE(igtk_cmd_v1.igtk));
3796 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3797 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3798 }
3799 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3800 sizeof(igtk_cmd), &igtk_cmd);
3801 }
3802
3803
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3804 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3805 struct ieee80211_vif *vif,
3806 struct ieee80211_sta *sta)
3807 {
3808 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3809
3810 if (sta)
3811 return sta->addr;
3812
3813 if (vif->type == NL80211_IFTYPE_STATION &&
3814 mvmvif->deflink.ap_sta_id != IWL_MVM_INVALID_STA) {
3815 u8 sta_id = mvmvif->deflink.ap_sta_id;
3816 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3817 lockdep_is_held(&mvm->mutex));
3818 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
3819 return NULL;
3820
3821 return sta->addr;
3822 }
3823
3824
3825 return NULL;
3826 }
3827
__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)3828 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3829 struct ieee80211_vif *vif,
3830 struct ieee80211_sta *sta,
3831 struct ieee80211_key_conf *keyconf,
3832 u8 key_offset,
3833 bool mcast)
3834 {
3835 const u8 *addr;
3836 struct ieee80211_key_seq seq;
3837 u16 p1k[5];
3838 u32 sta_id;
3839 bool mfp = false;
3840
3841 if (sta) {
3842 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3843
3844 sta_id = mvm_sta->deflink.sta_id;
3845 mfp = sta->mfp;
3846 } else if (vif->type == NL80211_IFTYPE_AP &&
3847 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3849
3850 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3851 } else {
3852 IWL_ERR(mvm, "Failed to find station id\n");
3853 return -EINVAL;
3854 }
3855
3856 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3857 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3858 if (!addr) {
3859 IWL_ERR(mvm, "Failed to find mac address\n");
3860 return -EINVAL;
3861 }
3862
3863 /* get phase 1 key from mac80211 */
3864 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3865 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3866
3867 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3868 seq.tkip.iv32, p1k, 0, key_offset,
3869 mfp);
3870 }
3871
3872 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3873 0, NULL, 0, key_offset, mfp);
3874 }
3875
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)3876 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3877 struct ieee80211_vif *vif,
3878 struct ieee80211_sta *sta,
3879 struct ieee80211_key_conf *keyconf,
3880 u8 key_offset)
3881 {
3882 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3883 struct iwl_mvm_sta *mvm_sta;
3884 u8 sta_id = IWL_MVM_INVALID_STA;
3885 int ret;
3886 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3887
3888 lockdep_assert_held(&mvm->mutex);
3889
3890 if (vif->type != NL80211_IFTYPE_AP ||
3891 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3892 /* Get the station id from the mvm local station table */
3893 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3894 if (!mvm_sta) {
3895 IWL_ERR(mvm, "Failed to find station\n");
3896 return -EINVAL;
3897 }
3898 sta_id = mvm_sta->deflink.sta_id;
3899
3900 /*
3901 * It is possible that the 'sta' parameter is NULL, and thus
3902 * there is a need to retrieve the sta from the local station
3903 * table.
3904 */
3905 if (!sta) {
3906 sta = rcu_dereference_protected(
3907 mvm->fw_id_to_mac_id[sta_id],
3908 lockdep_is_held(&mvm->mutex));
3909 if (IS_ERR_OR_NULL(sta)) {
3910 IWL_ERR(mvm, "Invalid station id\n");
3911 return -EINVAL;
3912 }
3913 }
3914
3915 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3916 return -EINVAL;
3917 } else {
3918 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3919
3920 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3921 }
3922
3923 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3924 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3925 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3926 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3927 goto end;
3928 }
3929
3930 /* If the key_offset is not pre-assigned, we need to find a
3931 * new offset to use. In normal cases, the offset is not
3932 * pre-assigned, but during HW_RESTART we want to reuse the
3933 * same indices, so we pass them when this function is called.
3934 *
3935 * In D3 entry, we need to hardcoded the indices (because the
3936 * firmware hardcodes the PTK offset to 0). In this case, we
3937 * need to make sure we don't overwrite the hw_key_idx in the
3938 * keyconf structure, because otherwise we cannot configure
3939 * the original ones back when resuming.
3940 */
3941 if (key_offset == STA_KEY_IDX_INVALID) {
3942 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3943 if (key_offset == STA_KEY_IDX_INVALID)
3944 return -ENOSPC;
3945 keyconf->hw_key_idx = key_offset;
3946 }
3947
3948 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3949 if (ret)
3950 goto end;
3951
3952 /*
3953 * For WEP, the same key is used for multicast and unicast. Upload it
3954 * again, using the same key offset, and now pointing the other one
3955 * to the same key slot (offset).
3956 * If this fails, remove the original as well.
3957 */
3958 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3959 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3960 sta) {
3961 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3962 key_offset, !mcast);
3963 if (ret) {
3964 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3965 goto end;
3966 }
3967 }
3968
3969 __set_bit(key_offset, mvm->fw_key_table);
3970
3971 end:
3972 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3973 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3974 sta ? sta->addr : zero_addr, ret);
3975 return ret;
3976 }
3977
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3978 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3979 struct ieee80211_vif *vif,
3980 struct ieee80211_sta *sta,
3981 struct ieee80211_key_conf *keyconf)
3982 {
3983 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3984 struct iwl_mvm_sta *mvm_sta;
3985 u8 sta_id = IWL_MVM_INVALID_STA;
3986 int ret, i;
3987
3988 lockdep_assert_held(&mvm->mutex);
3989
3990 /* Get the station from the mvm local station table */
3991 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3992 if (mvm_sta)
3993 sta_id = mvm_sta->deflink.sta_id;
3994 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3995 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id;
3996
3997
3998 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3999 keyconf->keyidx, sta_id);
4000
4001 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
4002 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
4003 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
4004 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
4005
4006 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
4007 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
4008 keyconf->hw_key_idx);
4009 return -ENOENT;
4010 }
4011
4012 /* track which key was deleted last */
4013 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
4014 if (mvm->fw_key_deleted[i] < U8_MAX)
4015 mvm->fw_key_deleted[i]++;
4016 }
4017 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
4018
4019 if (sta && !mvm_sta) {
4020 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
4021 return 0;
4022 }
4023
4024 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
4025 if (ret)
4026 return ret;
4027
4028 /* delete WEP key twice to get rid of (now useless) offset */
4029 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4030 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
4031 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
4032
4033 return ret;
4034 }
4035
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)4036 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
4037 struct ieee80211_vif *vif,
4038 struct ieee80211_key_conf *keyconf,
4039 struct ieee80211_sta *sta, u32 iv32,
4040 u16 *phase1key)
4041 {
4042 struct iwl_mvm_sta *mvm_sta;
4043 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
4044 bool mfp = sta ? sta->mfp : false;
4045
4046 rcu_read_lock();
4047
4048 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
4049 if (WARN_ON_ONCE(!mvm_sta))
4050 goto unlock;
4051 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast,
4052 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
4053 mfp);
4054
4055 unlock:
4056 rcu_read_unlock();
4057 }
4058
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)4059 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
4060 struct ieee80211_sta *sta)
4061 {
4062 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4063 struct iwl_mvm_add_sta_cmd cmd = {
4064 .add_modify = STA_MODE_MODIFY,
4065 .sta_id = mvmsta->deflink.sta_id,
4066 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
4067 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4068 };
4069 int ret;
4070
4071 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4072 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4073 if (ret)
4074 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4075 }
4076
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)4077 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
4078 struct ieee80211_sta *sta,
4079 enum ieee80211_frame_release_type reason,
4080 u16 cnt, u16 tids, bool more_data,
4081 bool single_sta_queue)
4082 {
4083 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4084 struct iwl_mvm_add_sta_cmd cmd = {
4085 .add_modify = STA_MODE_MODIFY,
4086 .sta_id = mvmsta->deflink.sta_id,
4087 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
4088 .sleep_tx_count = cpu_to_le16(cnt),
4089 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4090 };
4091 int tid, ret;
4092 unsigned long _tids = tids;
4093
4094 /* convert TIDs to ACs - we don't support TSPEC so that's OK
4095 * Note that this field is reserved and unused by firmware not
4096 * supporting GO uAPSD, so it's safe to always do this.
4097 */
4098 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
4099 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
4100
4101 /* If we're releasing frames from aggregation or dqa queues then check
4102 * if all the queues that we're releasing frames from, combined, have:
4103 * - more frames than the service period, in which case more_data
4104 * needs to be set
4105 * - fewer than 'cnt' frames, in which case we need to adjust the
4106 * firmware command (but do that unconditionally)
4107 */
4108 if (single_sta_queue) {
4109 int remaining = cnt;
4110 int sleep_tx_count;
4111
4112 spin_lock_bh(&mvmsta->lock);
4113 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
4114 struct iwl_mvm_tid_data *tid_data;
4115 u16 n_queued;
4116
4117 tid_data = &mvmsta->tid_data[tid];
4118
4119 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
4120 if (n_queued > remaining) {
4121 more_data = true;
4122 remaining = 0;
4123 break;
4124 }
4125 remaining -= n_queued;
4126 }
4127 sleep_tx_count = cnt - remaining;
4128 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
4129 mvmsta->sleep_tx_count = sleep_tx_count;
4130 spin_unlock_bh(&mvmsta->lock);
4131
4132 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
4133 if (WARN_ON(cnt - remaining == 0)) {
4134 ieee80211_sta_eosp(sta);
4135 return;
4136 }
4137 }
4138
4139 /* Note: this is ignored by firmware not supporting GO uAPSD */
4140 if (more_data)
4141 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
4142
4143 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
4144 mvmsta->next_status_eosp = true;
4145 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
4146 } else {
4147 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
4148 }
4149
4150 /* block the Tx queues until the FW updated the sleep Tx count */
4151 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
4152 CMD_ASYNC | CMD_BLOCK_TXQS,
4153 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4154 if (ret)
4155 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4156 }
4157
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)4158 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
4159 struct iwl_rx_cmd_buffer *rxb)
4160 {
4161 struct iwl_rx_packet *pkt = rxb_addr(rxb);
4162 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
4163 struct ieee80211_sta *sta;
4164 u32 sta_id = le32_to_cpu(notif->sta_id);
4165
4166 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
4167 return;
4168
4169 rcu_read_lock();
4170 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
4171 if (!IS_ERR_OR_NULL(sta))
4172 ieee80211_sta_eosp(sta);
4173 rcu_read_unlock();
4174 }
4175
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)4176 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
4177 struct iwl_mvm_sta *mvmsta,
4178 bool disable)
4179 {
4180 struct iwl_mvm_add_sta_cmd cmd = {
4181 .add_modify = STA_MODE_MODIFY,
4182 .sta_id = mvmsta->deflink.sta_id,
4183 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4184 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4185 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4186 };
4187 int ret;
4188
4189 if (mvm->mld_api_is_used) {
4190 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4191 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable);
4192 return;
4193 }
4194
4195 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4196 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4197 if (ret)
4198 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4199 }
4200
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)4201 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
4202 struct ieee80211_sta *sta,
4203 bool disable)
4204 {
4205 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4206
4207 if (mvm->mld_api_is_used) {
4208 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4209 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable);
4210 return;
4211 }
4212
4213 spin_lock_bh(&mvm_sta->lock);
4214
4215 if (mvm_sta->disable_tx == disable) {
4216 spin_unlock_bh(&mvm_sta->lock);
4217 return;
4218 }
4219
4220 mvm_sta->disable_tx = disable;
4221
4222 /*
4223 * If sta PS state is handled by mac80211, tell it to start/stop
4224 * queuing tx for this station.
4225 */
4226 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4227 ieee80211_sta_block_awake(mvm->hw, sta, disable);
4228
4229 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4230
4231 spin_unlock_bh(&mvm_sta->lock);
4232 }
4233
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)4234 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4235 struct iwl_mvm_vif *mvmvif,
4236 struct iwl_mvm_int_sta *sta,
4237 bool disable)
4238 {
4239 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4240 struct iwl_mvm_add_sta_cmd cmd = {
4241 .add_modify = STA_MODE_MODIFY,
4242 .sta_id = sta->sta_id,
4243 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4244 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4245 .mac_id_n_color = cpu_to_le32(id),
4246 };
4247 int ret;
4248
4249 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4250 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4251 if (ret)
4252 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4253 }
4254
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)4255 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4256 struct iwl_mvm_vif *mvmvif,
4257 bool disable)
4258 {
4259 struct ieee80211_sta *sta;
4260 struct iwl_mvm_sta *mvm_sta;
4261 int i;
4262
4263 if (mvm->mld_api_is_used) {
4264 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4265 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif,
4266 disable);
4267 return;
4268 }
4269
4270 rcu_read_lock();
4271
4272 /* Block/unblock all the stations of the given mvmvif */
4273 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4274 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4275 if (IS_ERR_OR_NULL(sta))
4276 continue;
4277
4278 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4279 if (mvm_sta->mac_id_n_color !=
4280 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4281 continue;
4282
4283 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4284 }
4285
4286 rcu_read_unlock();
4287
4288 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4289 return;
4290
4291 /* Need to block/unblock also multicast station */
4292 if (mvmvif->deflink.mcast_sta.sta_id != IWL_MVM_INVALID_STA)
4293 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4294 &mvmvif->deflink.mcast_sta,
4295 disable);
4296
4297 /*
4298 * Only unblock the broadcast station (FW blocks it for immediate
4299 * quiet, not the driver)
4300 */
4301 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_MVM_INVALID_STA)
4302 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4303 &mvmvif->deflink.bcast_sta,
4304 disable);
4305 }
4306
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)4307 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4308 {
4309 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4310 struct iwl_mvm_sta *mvmsta;
4311
4312 rcu_read_lock();
4313
4314 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id);
4315
4316 if (mvmsta)
4317 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4318
4319 rcu_read_unlock();
4320 }
4321
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)4322 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4323 {
4324 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4325
4326 /*
4327 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4328 * to align the wrap around of ssn so we compare relevant values.
4329 */
4330 if (mvm->trans->trans_cfg->gen2)
4331 sn &= 0xff;
4332
4333 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4334 }
4335
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,struct ieee80211_key_conf * keyconf)4336 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4337 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4338 u8 *key, u32 key_len,
4339 struct ieee80211_key_conf *keyconf)
4340 {
4341 int ret;
4342 u16 queue;
4343 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4344 unsigned int wdg_timeout =
4345 iwl_mvm_get_wd_timeout(mvm, vif, false, false);
4346 bool mld = iwl_mvm_has_mld_api(mvm->fw);
4347 u32 type = mld ? STATION_TYPE_PEER : IWL_STA_LINK;
4348
4349 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4350 NL80211_IFTYPE_UNSPECIFIED, type);
4351 if (ret)
4352 return ret;
4353
4354 if (mld)
4355 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr,
4356 mvmvif->deflink.fw_link_id,
4357 &queue,
4358 IWL_MAX_TID_COUNT,
4359 &wdg_timeout);
4360 else
4361 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id,
4362 mvmvif->color, addr, sta,
4363 &queue,
4364 IWL_MVM_TX_FIFO_BE);
4365 if (ret)
4366 goto out;
4367
4368 keyconf->cipher = cipher;
4369 memcpy(keyconf->key, key, key_len);
4370 keyconf->keylen = key_len;
4371 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE;
4372
4373 if (mld) {
4374 /* The MFP flag is set according to the station mfp field. Since
4375 * we don't have a station, set it manually.
4376 */
4377 u32 key_flags =
4378 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) |
4379 IWL_SEC_KEY_FLAG_MFP;
4380 u32 sta_mask = BIT(sta->sta_id);
4381
4382 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf);
4383 } else {
4384 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4385 0, NULL, 0, 0, true);
4386 }
4387
4388 out:
4389 if (ret)
4390 iwl_mvm_dealloc_int_sta(mvm, sta);
4391 return ret;
4392 }
4393
iwl_mvm_cancel_channel_switch(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id)4394 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4395 struct ieee80211_vif *vif,
4396 u32 id)
4397 {
4398 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4399 .id = cpu_to_le32(id),
4400 };
4401 int ret;
4402
4403 ret = iwl_mvm_send_cmd_pdu(mvm,
4404 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4405 CMD_ASYNC,
4406 sizeof(cancel_channel_switch_cmd),
4407 &cancel_channel_switch_cmd);
4408 if (ret)
4409 IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4410 }
4411
iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif * mvmvif,u8 fw_sta_id)4412 static int iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif *mvmvif,
4413 u8 fw_sta_id)
4414 {
4415 struct ieee80211_link_sta *link_sta =
4416 rcu_dereference(mvmvif->mvm->fw_id_to_link_sta[fw_sta_id]);
4417 struct iwl_mvm_vif_link_info *link;
4418
4419 if (WARN_ON_ONCE(!link_sta))
4420 return -EINVAL;
4421
4422 link = mvmvif->link[link_sta->link_id];
4423
4424 if (WARN_ON_ONCE(!link))
4425 return -EINVAL;
4426
4427 return link->fw_link_id;
4428 }
4429
4430 #define IWL_MVM_TPT_COUNT_WINDOW (IWL_MVM_TPT_COUNT_WINDOW_SEC * HZ)
4431
iwl_mvm_count_mpdu(struct iwl_mvm_sta * mvm_sta,u8 fw_sta_id,u32 count,bool tx,int queue)4432 void iwl_mvm_count_mpdu(struct iwl_mvm_sta *mvm_sta, u8 fw_sta_id, u32 count,
4433 bool tx, int queue)
4434 {
4435 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvm_sta->vif);
4436 struct iwl_mvm_tpt_counter *queue_counter;
4437 struct iwl_mvm_mpdu_counter *link_counter;
4438 u32 total_mpdus = 0;
4439 int fw_link_id;
4440
4441 /* Count only for a BSS sta, and only when EMLSR is possible */
4442 if (!mvm_sta->mpdu_counters)
4443 return;
4444
4445 /* Map sta id to link id */
4446 fw_link_id = iwl_mvm_fw_sta_id_to_fw_link_id(mvmvif, fw_sta_id);
4447 if (fw_link_id < 0)
4448 return;
4449
4450 queue_counter = &mvm_sta->mpdu_counters[queue];
4451 link_counter = &queue_counter->per_link[fw_link_id];
4452
4453 spin_lock_bh(&queue_counter->lock);
4454
4455 if (tx)
4456 link_counter->tx += count;
4457 else
4458 link_counter->rx += count;
4459
4460 /*
4461 * When not in EMLSR, the window and the decision to enter EMLSR are
4462 * handled during counting, when in EMLSR - in the statistics flow
4463 */
4464 if (mvmvif->esr_active)
4465 goto out;
4466
4467 if (time_is_before_jiffies(queue_counter->window_start +
4468 IWL_MVM_TPT_COUNT_WINDOW)) {
4469 memset(queue_counter->per_link, 0,
4470 sizeof(queue_counter->per_link));
4471 queue_counter->window_start = jiffies;
4472 }
4473
4474 for (int i = 0; i < IWL_MVM_FW_MAX_LINK_ID; i++)
4475 total_mpdus += tx ? queue_counter->per_link[i].tx :
4476 queue_counter->per_link[i].rx;
4477
4478 if (total_mpdus > IWL_MVM_ENTER_ESR_TPT_THRESH)
4479 wiphy_work_queue(mvmvif->mvm->hw->wiphy,
4480 &mvmvif->unblock_esr_tpt_wk);
4481
4482 out:
4483 spin_unlock_bh(&queue_counter->lock);
4484 }
4485