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_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_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 if (sta) {
861 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
862 struct ieee80211_link_sta *link_sta;
863 unsigned int link_id;
864
865 rcu_read_lock();
866 for_each_sta_active_link(mvmsta->vif, sta, link_sta, link_id) {
867 struct iwl_mvm_link_sta *link =
868 rcu_dereference_protected(mvmsta->link[link_id],
869 lockdep_is_held(&mvm->mutex));
870
871 if (!link)
872 continue;
873
874 sta_mask |= BIT(link->sta_id);
875 }
876 rcu_read_unlock();
877 } else {
878 sta_mask |= BIT(sta_id);
879 }
880
881 if (!sta_mask)
882 return -EINVAL;
883
884 queue = iwl_trans_txq_alloc(mvm->trans, 0, sta_mask,
885 tid, size, timeout);
886
887 if (queue >= 0)
888 IWL_DEBUG_TX_QUEUES(mvm,
889 "Enabling TXQ #%d for sta mask 0x%x tid %d\n",
890 queue, sta_mask, tid);
891
892 return queue;
893 }
894
iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)895 static int iwl_mvm_sta_alloc_queue_tvqm(struct iwl_mvm *mvm,
896 struct ieee80211_sta *sta, u8 ac,
897 int tid)
898 {
899 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
900 struct iwl_mvm_txq *mvmtxq =
901 iwl_mvm_txq_from_tid(sta, tid);
902 unsigned int wdg_timeout =
903 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif);
904 int queue = -1;
905
906 lockdep_assert_held(&mvm->mutex);
907
908 IWL_DEBUG_TX_QUEUES(mvm,
909 "Allocating queue for sta %d on tid %d\n",
910 mvmsta->deflink.sta_id, tid);
911 queue = iwl_mvm_tvqm_enable_txq(mvm, sta, mvmsta->deflink.sta_id,
912 tid, wdg_timeout);
913 if (queue < 0)
914 return queue;
915
916 mvmtxq->txq_id = queue;
917 mvm->tvqm_info[queue].txq_tid = tid;
918 mvm->tvqm_info[queue].sta_id = mvmsta->deflink.sta_id;
919
920 IWL_DEBUG_TX_QUEUES(mvm, "Allocated queue is %d\n", queue);
921
922 spin_lock_bh(&mvmsta->lock);
923 mvmsta->tid_data[tid].txq_id = queue;
924 spin_unlock_bh(&mvmsta->lock);
925
926 return 0;
927 }
928
iwl_mvm_update_txq_mapping(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int queue,u8 sta_id,u8 tid)929 static bool iwl_mvm_update_txq_mapping(struct iwl_mvm *mvm,
930 struct ieee80211_sta *sta,
931 int queue, u8 sta_id, u8 tid)
932 {
933 bool enable_queue = true;
934
935 /* Make sure this TID isn't already enabled */
936 if (mvm->queue_info[queue].tid_bitmap & BIT(tid)) {
937 IWL_ERR(mvm, "Trying to enable TXQ %d with existing TID %d\n",
938 queue, tid);
939 return false;
940 }
941
942 /* Update mappings and refcounts */
943 if (mvm->queue_info[queue].tid_bitmap)
944 enable_queue = false;
945
946 mvm->queue_info[queue].tid_bitmap |= BIT(tid);
947 mvm->queue_info[queue].ra_sta_id = sta_id;
948
949 if (enable_queue) {
950 if (tid != IWL_MAX_TID_COUNT)
951 mvm->queue_info[queue].mac80211_ac =
952 tid_to_mac80211_ac[tid];
953 else
954 mvm->queue_info[queue].mac80211_ac = IEEE80211_AC_VO;
955
956 mvm->queue_info[queue].txq_tid = tid;
957 }
958
959 if (sta) {
960 struct iwl_mvm_txq *mvmtxq =
961 iwl_mvm_txq_from_tid(sta, tid);
962
963 mvmtxq->txq_id = queue;
964 }
965
966 IWL_DEBUG_TX_QUEUES(mvm,
967 "Enabling TXQ #%d tids=0x%x\n",
968 queue, mvm->queue_info[queue].tid_bitmap);
969
970 return enable_queue;
971 }
972
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)973 static bool iwl_mvm_enable_txq(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
974 int queue, u16 ssn,
975 const struct iwl_trans_txq_scd_cfg *cfg,
976 unsigned int wdg_timeout)
977 {
978 struct iwl_scd_txq_cfg_cmd cmd = {
979 .scd_queue = queue,
980 .action = SCD_CFG_ENABLE_QUEUE,
981 .window = cfg->frame_limit,
982 .sta_id = cfg->sta_id,
983 .ssn = cpu_to_le16(ssn),
984 .tx_fifo = cfg->fifo,
985 .aggregate = cfg->aggregate,
986 .tid = cfg->tid,
987 };
988 bool inc_ssn;
989
990 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
991 return false;
992
993 /* Send the enabling command if we need to */
994 if (!iwl_mvm_update_txq_mapping(mvm, sta, queue, cfg->sta_id, cfg->tid))
995 return false;
996
997 inc_ssn = iwl_trans_txq_enable_cfg(mvm->trans, queue, ssn,
998 NULL, wdg_timeout);
999 if (inc_ssn)
1000 le16_add_cpu(&cmd.ssn, 1);
1001
1002 WARN(iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd),
1003 "Failed to configure queue %d on FIFO %d\n", queue, cfg->fifo);
1004
1005 return inc_ssn;
1006 }
1007
iwl_mvm_change_queue_tid(struct iwl_mvm * mvm,int queue)1008 static void iwl_mvm_change_queue_tid(struct iwl_mvm *mvm, int queue)
1009 {
1010 struct iwl_scd_txq_cfg_cmd cmd = {
1011 .scd_queue = queue,
1012 .action = SCD_CFG_UPDATE_QUEUE_TID,
1013 };
1014 int tid;
1015 unsigned long tid_bitmap;
1016 int ret;
1017
1018 lockdep_assert_held(&mvm->mutex);
1019
1020 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1021 return;
1022
1023 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1024
1025 if (WARN(!tid_bitmap, "TXQ %d has no tids assigned to it\n", queue))
1026 return;
1027
1028 /* Find any TID for queue */
1029 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1030 cmd.tid = tid;
1031 cmd.tx_fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
1032
1033 ret = iwl_mvm_send_cmd_pdu(mvm, SCD_QUEUE_CFG, 0, sizeof(cmd), &cmd);
1034 if (ret) {
1035 IWL_ERR(mvm, "Failed to update owner of TXQ %d (ret=%d)\n",
1036 queue, ret);
1037 return;
1038 }
1039
1040 mvm->queue_info[queue].txq_tid = tid;
1041 IWL_DEBUG_TX_QUEUES(mvm, "Changed TXQ %d ownership to tid %d\n",
1042 queue, tid);
1043 }
1044
iwl_mvm_unshare_queue(struct iwl_mvm * mvm,int queue)1045 static void iwl_mvm_unshare_queue(struct iwl_mvm *mvm, int queue)
1046 {
1047 struct ieee80211_sta *sta;
1048 struct iwl_mvm_sta *mvmsta;
1049 u8 sta_id;
1050 int tid = -1;
1051 unsigned long tid_bitmap;
1052 unsigned int wdg_timeout;
1053 int ssn;
1054 int ret = true;
1055
1056 /* queue sharing is disabled on new TX path */
1057 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1058 return;
1059
1060 lockdep_assert_held(&mvm->mutex);
1061
1062 sta_id = mvm->queue_info[queue].ra_sta_id;
1063 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1064
1065 /* Find TID for queue, and make sure it is the only one on the queue */
1066 tid = find_first_bit(&tid_bitmap, IWL_MAX_TID_COUNT + 1);
1067 if (tid_bitmap != BIT(tid)) {
1068 IWL_ERR(mvm, "Failed to unshare q %d, active tids=0x%lx\n",
1069 queue, tid_bitmap);
1070 return;
1071 }
1072
1073 IWL_DEBUG_TX_QUEUES(mvm, "Unsharing TXQ %d, keeping tid %d\n", queue,
1074 tid);
1075
1076 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1077 lockdep_is_held(&mvm->mutex));
1078
1079 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
1080 return;
1081
1082 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1083 wdg_timeout = iwl_mvm_get_wd_timeout(mvm, mvmsta->vif);
1084
1085 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1086
1087 ret = iwl_mvm_redirect_queue(mvm, queue, tid,
1088 tid_to_mac80211_ac[tid], ssn,
1089 wdg_timeout, true,
1090 iwl_mvm_txq_from_tid(sta, tid));
1091 if (ret) {
1092 IWL_ERR(mvm, "Failed to redirect TXQ %d\n", queue);
1093 return;
1094 }
1095
1096 /* If aggs should be turned back on - do it */
1097 if (mvmsta->tid_data[tid].state == IWL_AGG_ON) {
1098 struct iwl_mvm_add_sta_cmd cmd = {0};
1099
1100 mvmsta->tid_disable_agg &= ~BIT(tid);
1101
1102 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1103 cmd.sta_id = mvmsta->deflink.sta_id;
1104 cmd.add_modify = STA_MODE_MODIFY;
1105 cmd.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1106 cmd.tfd_queue_msk = cpu_to_le32(mvmsta->tfd_queue_msk);
1107 cmd.tid_disable_tx = cpu_to_le16(mvmsta->tid_disable_agg);
1108
1109 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
1110 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
1111 if (!ret) {
1112 IWL_DEBUG_TX_QUEUES(mvm,
1113 "TXQ #%d is now aggregated again\n",
1114 queue);
1115
1116 /* Mark queue intenally as aggregating again */
1117 iwl_trans_txq_set_shared_mode(mvm->trans, queue, false);
1118 }
1119 }
1120
1121 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1122 }
1123
1124 /*
1125 * Remove inactive TIDs of a given queue.
1126 * If all queue TIDs are inactive - mark the queue as inactive
1127 * If only some the queue TIDs are inactive - unmap them from the queue
1128 *
1129 * Returns %true if all TIDs were removed and the queue could be reused.
1130 */
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)1131 static bool iwl_mvm_remove_inactive_tids(struct iwl_mvm *mvm,
1132 struct iwl_mvm_sta *mvmsta, int queue,
1133 unsigned long tid_bitmap,
1134 unsigned long *unshare_queues,
1135 unsigned long *changetid_queues)
1136 {
1137 unsigned int tid;
1138
1139 lockdep_assert_held(&mvmsta->lock);
1140 lockdep_assert_held(&mvm->mutex);
1141
1142 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1143 return false;
1144
1145 /* Go over all non-active TIDs, incl. IWL_MAX_TID_COUNT (for mgmt) */
1146 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1147 /* If some TFDs are still queued - don't mark TID as inactive */
1148 if (iwl_mvm_tid_queued(mvm, &mvmsta->tid_data[tid]))
1149 tid_bitmap &= ~BIT(tid);
1150
1151 /* Don't mark as inactive any TID that has an active BA */
1152 if (mvmsta->tid_data[tid].state != IWL_AGG_OFF)
1153 tid_bitmap &= ~BIT(tid);
1154 }
1155
1156 /* If all TIDs in the queue are inactive - return it can be reused */
1157 if (tid_bitmap == mvm->queue_info[queue].tid_bitmap) {
1158 IWL_DEBUG_TX_QUEUES(mvm, "Queue %d is inactive\n", queue);
1159 return true;
1160 }
1161
1162 /*
1163 * If we are here, this is a shared queue and not all TIDs timed-out.
1164 * Remove the ones that did.
1165 */
1166 for_each_set_bit(tid, &tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1167 u16 q_tid_bitmap;
1168
1169 mvmsta->tid_data[tid].txq_id = IWL_MVM_INVALID_QUEUE;
1170 mvm->queue_info[queue].tid_bitmap &= ~BIT(tid);
1171
1172 q_tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1173
1174 /*
1175 * We need to take into account a situation in which a TXQ was
1176 * allocated to TID x, and then turned shared by adding TIDs y
1177 * and z. If TID x becomes inactive and is removed from the TXQ,
1178 * ownership must be given to one of the remaining TIDs.
1179 * This is mainly because if TID x continues - a new queue can't
1180 * be allocated for it as long as it is an owner of another TXQ.
1181 *
1182 * Mark this queue in the right bitmap, we'll send the command
1183 * to the firmware later.
1184 */
1185 if (!(q_tid_bitmap & BIT(mvm->queue_info[queue].txq_tid)))
1186 set_bit(queue, changetid_queues);
1187
1188 IWL_DEBUG_TX_QUEUES(mvm,
1189 "Removing inactive TID %d from shared Q:%d\n",
1190 tid, queue);
1191 }
1192
1193 IWL_DEBUG_TX_QUEUES(mvm,
1194 "TXQ #%d left with tid bitmap 0x%x\n", queue,
1195 mvm->queue_info[queue].tid_bitmap);
1196
1197 /*
1198 * There may be different TIDs with the same mac queues, so make
1199 * sure all TIDs have existing corresponding mac queues enabled
1200 */
1201 tid_bitmap = mvm->queue_info[queue].tid_bitmap;
1202
1203 /* If the queue is marked as shared - "unshare" it */
1204 if (hweight16(mvm->queue_info[queue].tid_bitmap) == 1 &&
1205 mvm->queue_info[queue].status == IWL_MVM_QUEUE_SHARED) {
1206 IWL_DEBUG_TX_QUEUES(mvm, "Marking Q:%d for reconfig\n",
1207 queue);
1208 set_bit(queue, unshare_queues);
1209 }
1210
1211 return false;
1212 }
1213
1214 /*
1215 * Check for inactivity - this includes checking if any queue
1216 * can be unshared and finding one (and only one) that can be
1217 * reused.
1218 * This function is also invoked as a sort of clean-up task,
1219 * in which case @alloc_for_sta is IWL_INVALID_STA.
1220 *
1221 * Returns the queue number, or -ENOSPC.
1222 */
iwl_mvm_inactivity_check(struct iwl_mvm * mvm,u8 alloc_for_sta)1223 static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
1224 {
1225 unsigned long now = jiffies;
1226 unsigned long unshare_queues = 0;
1227 unsigned long changetid_queues = 0;
1228 int i, ret, free_queue = -ENOSPC;
1229 struct ieee80211_sta *queue_owner = NULL;
1230
1231 lockdep_assert_held(&mvm->mutex);
1232
1233 if (iwl_mvm_has_new_tx_api(mvm))
1234 return -ENOSPC;
1235
1236 rcu_read_lock();
1237
1238 /* we skip the CMD queue below by starting at 1 */
1239 BUILD_BUG_ON(IWL_MVM_DQA_CMD_QUEUE != 0);
1240
1241 for (i = 1; i < IWL_MAX_HW_QUEUES; i++) {
1242 struct ieee80211_sta *sta;
1243 struct iwl_mvm_sta *mvmsta;
1244 u8 sta_id;
1245 int tid;
1246 unsigned long inactive_tid_bitmap = 0;
1247 unsigned long queue_tid_bitmap;
1248
1249 queue_tid_bitmap = mvm->queue_info[i].tid_bitmap;
1250 if (!queue_tid_bitmap)
1251 continue;
1252
1253 /* If TXQ isn't in active use anyway - nothing to do here... */
1254 if (mvm->queue_info[i].status != IWL_MVM_QUEUE_READY &&
1255 mvm->queue_info[i].status != IWL_MVM_QUEUE_SHARED)
1256 continue;
1257
1258 /* Check to see if there are inactive TIDs on this queue */
1259 for_each_set_bit(tid, &queue_tid_bitmap,
1260 IWL_MAX_TID_COUNT + 1) {
1261 if (time_after(mvm->queue_info[i].last_frame_time[tid] +
1262 IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1263 continue;
1264
1265 inactive_tid_bitmap |= BIT(tid);
1266 }
1267
1268 /* If all TIDs are active - finish check on this queue */
1269 if (!inactive_tid_bitmap)
1270 continue;
1271
1272 /*
1273 * If we are here - the queue hadn't been served recently and is
1274 * in use
1275 */
1276
1277 sta_id = mvm->queue_info[i].ra_sta_id;
1278 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1279
1280 /*
1281 * If the STA doesn't exist anymore, it isn't an error. It could
1282 * be that it was removed since getting the queues, and in this
1283 * case it should've inactivated its queues anyway.
1284 */
1285 if (IS_ERR_OR_NULL(sta))
1286 continue;
1287
1288 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1289
1290 spin_lock_bh(&mvmsta->lock);
1291 ret = iwl_mvm_remove_inactive_tids(mvm, mvmsta, i,
1292 inactive_tid_bitmap,
1293 &unshare_queues,
1294 &changetid_queues);
1295 if (ret && free_queue < 0) {
1296 queue_owner = sta;
1297 free_queue = i;
1298 }
1299 /* only unlock sta lock - we still need the queue info lock */
1300 spin_unlock_bh(&mvmsta->lock);
1301 }
1302
1303
1304 /* Reconfigure queues requiring reconfiguation */
1305 for_each_set_bit(i, &unshare_queues, IWL_MAX_HW_QUEUES)
1306 iwl_mvm_unshare_queue(mvm, i);
1307 for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
1308 iwl_mvm_change_queue_tid(mvm, i);
1309
1310 rcu_read_unlock();
1311
1312 if (free_queue >= 0 && alloc_for_sta != IWL_INVALID_STA) {
1313 ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
1314 alloc_for_sta);
1315 if (ret)
1316 return ret;
1317 }
1318
1319 return free_queue;
1320 }
1321
iwl_mvm_sta_alloc_queue(struct iwl_mvm * mvm,struct ieee80211_sta * sta,u8 ac,int tid)1322 static int iwl_mvm_sta_alloc_queue(struct iwl_mvm *mvm,
1323 struct ieee80211_sta *sta, u8 ac, int tid)
1324 {
1325 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1326 struct iwl_trans_txq_scd_cfg cfg = {
1327 .fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac),
1328 .sta_id = mvmsta->deflink.sta_id,
1329 .tid = tid,
1330 .frame_limit = IWL_FRAME_LIMIT,
1331 };
1332 unsigned int wdg_timeout =
1333 iwl_mvm_get_wd_timeout(mvm, mvmsta->vif);
1334 int queue = -1;
1335 u16 queue_tmp;
1336 unsigned long disable_agg_tids = 0;
1337 enum iwl_mvm_agg_state queue_state;
1338 bool shared_queue = false, inc_ssn;
1339 int ssn;
1340 unsigned long tfd_queue_mask;
1341 int ret;
1342
1343 lockdep_assert_held(&mvm->mutex);
1344
1345 if (iwl_mvm_has_new_tx_api(mvm))
1346 return iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
1347
1348 spin_lock_bh(&mvmsta->lock);
1349 tfd_queue_mask = mvmsta->tfd_queue_msk;
1350 ssn = IEEE80211_SEQ_TO_SN(mvmsta->tid_data[tid].seq_number);
1351 spin_unlock_bh(&mvmsta->lock);
1352
1353 if (tid == IWL_MAX_TID_COUNT) {
1354 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1355 IWL_MVM_DQA_MIN_MGMT_QUEUE,
1356 IWL_MVM_DQA_MAX_MGMT_QUEUE);
1357 if (queue >= IWL_MVM_DQA_MIN_MGMT_QUEUE)
1358 IWL_DEBUG_TX_QUEUES(mvm, "Found free MGMT queue #%d\n",
1359 queue);
1360
1361 /* If no such queue is found, we'll use a DATA queue instead */
1362 }
1363
1364 if ((queue < 0 && mvmsta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) &&
1365 (mvm->queue_info[mvmsta->reserved_queue].status ==
1366 IWL_MVM_QUEUE_RESERVED)) {
1367 queue = mvmsta->reserved_queue;
1368 mvm->queue_info[queue].reserved = true;
1369 IWL_DEBUG_TX_QUEUES(mvm, "Using reserved queue #%d\n", queue);
1370 }
1371
1372 if (queue < 0)
1373 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1374 IWL_MVM_DQA_MIN_DATA_QUEUE,
1375 IWL_MVM_DQA_MAX_DATA_QUEUE);
1376 if (queue < 0) {
1377 /* try harder - perhaps kill an inactive queue */
1378 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1379 }
1380
1381 /* No free queue - we'll have to share */
1382 if (queue <= 0) {
1383 queue = iwl_mvm_get_shared_queue(mvm, tfd_queue_mask, ac);
1384 if (queue > 0) {
1385 shared_queue = true;
1386 mvm->queue_info[queue].status = IWL_MVM_QUEUE_SHARED;
1387 }
1388 }
1389
1390 /*
1391 * Mark TXQ as ready, even though it hasn't been fully configured yet,
1392 * to make sure no one else takes it.
1393 * This will allow avoiding re-acquiring the lock at the end of the
1394 * configuration. On error we'll mark it back as free.
1395 */
1396 if (queue > 0 && !shared_queue)
1397 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
1398
1399 /* This shouldn't happen - out of queues */
1400 if (WARN_ON(queue <= 0)) {
1401 IWL_ERR(mvm, "No available queues for tid %d on sta_id %d\n",
1402 tid, cfg.sta_id);
1403 return queue;
1404 }
1405
1406 /*
1407 * Actual en/disablement of aggregations is through the ADD_STA HCMD,
1408 * but for configuring the SCD to send A-MPDUs we need to mark the queue
1409 * as aggregatable.
1410 * Mark all DATA queues as allowing to be aggregated at some point
1411 */
1412 cfg.aggregate = (queue >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1413 queue == IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1414
1415 IWL_DEBUG_TX_QUEUES(mvm,
1416 "Allocating %squeue #%d to sta %d on tid %d\n",
1417 shared_queue ? "shared " : "", queue,
1418 mvmsta->deflink.sta_id, tid);
1419
1420 if (shared_queue) {
1421 /* Disable any open aggs on this queue */
1422 disable_agg_tids = iwl_mvm_get_queue_agg_tids(mvm, queue);
1423
1424 if (disable_agg_tids) {
1425 IWL_DEBUG_TX_QUEUES(mvm, "Disabling aggs on queue %d\n",
1426 queue);
1427 iwl_mvm_invalidate_sta_queue(mvm, queue,
1428 disable_agg_tids, false);
1429 }
1430 }
1431
1432 inc_ssn = iwl_mvm_enable_txq(mvm, sta, queue, ssn, &cfg, wdg_timeout);
1433
1434 /*
1435 * Mark queue as shared in transport if shared
1436 * Note this has to be done after queue enablement because enablement
1437 * can also set this value, and there is no indication there to shared
1438 * queues
1439 */
1440 if (shared_queue)
1441 iwl_trans_txq_set_shared_mode(mvm->trans, queue, true);
1442
1443 spin_lock_bh(&mvmsta->lock);
1444 /*
1445 * This looks racy, but it is not. We have only one packet for
1446 * this ra/tid in our Tx path since we stop the Qdisc when we
1447 * need to allocate a new TFD queue.
1448 */
1449 if (inc_ssn) {
1450 mvmsta->tid_data[tid].seq_number += 0x10;
1451 ssn = (ssn + 1) & IEEE80211_SCTL_SEQ;
1452 }
1453 mvmsta->tid_data[tid].txq_id = queue;
1454 mvmsta->tfd_queue_msk |= BIT(queue);
1455 queue_state = mvmsta->tid_data[tid].state;
1456
1457 if (mvmsta->reserved_queue == queue)
1458 mvmsta->reserved_queue = IEEE80211_INVAL_HW_QUEUE;
1459 spin_unlock_bh(&mvmsta->lock);
1460
1461 if (!shared_queue) {
1462 ret = iwl_mvm_sta_send_to_fw(mvm, sta, true, STA_MODIFY_QUEUES);
1463 if (ret)
1464 goto out_err;
1465
1466 /* If we need to re-enable aggregations... */
1467 if (queue_state == IWL_AGG_ON) {
1468 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
1469 if (ret)
1470 goto out_err;
1471 }
1472 } else {
1473 /* Redirect queue, if needed */
1474 ret = iwl_mvm_redirect_queue(mvm, queue, tid, ac, ssn,
1475 wdg_timeout, false,
1476 iwl_mvm_txq_from_tid(sta, tid));
1477 if (ret)
1478 goto out_err;
1479 }
1480
1481 return 0;
1482
1483 out_err:
1484 queue_tmp = queue;
1485 iwl_mvm_disable_txq(mvm, sta, mvmsta->deflink.sta_id, &queue_tmp, tid);
1486
1487 return ret;
1488 }
1489
iwl_mvm_sta_ensure_queue(struct iwl_mvm * mvm,struct ieee80211_txq * txq)1490 int iwl_mvm_sta_ensure_queue(struct iwl_mvm *mvm,
1491 struct ieee80211_txq *txq)
1492 {
1493 struct iwl_mvm_txq *mvmtxq = iwl_mvm_txq_from_mac80211(txq);
1494 int ret = -EINVAL;
1495
1496 lockdep_assert_held(&mvm->mutex);
1497
1498 if (likely(test_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state)) ||
1499 !txq->sta) {
1500 return 0;
1501 }
1502
1503 if (!iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, txq->tid)) {
1504 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1505 ret = 0;
1506 }
1507
1508 local_bh_disable();
1509 spin_lock(&mvm->add_stream_lock);
1510 if (!list_empty(&mvmtxq->list))
1511 list_del_init(&mvmtxq->list);
1512 spin_unlock(&mvm->add_stream_lock);
1513 local_bh_enable();
1514
1515 return ret;
1516 }
1517
iwl_mvm_add_new_dqa_stream_wk(struct work_struct * wk)1518 void iwl_mvm_add_new_dqa_stream_wk(struct work_struct *wk)
1519 {
1520 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm,
1521 add_stream_wk);
1522
1523 mutex_lock(&mvm->mutex);
1524
1525 iwl_mvm_inactivity_check(mvm, IWL_INVALID_STA);
1526
1527 while (!list_empty(&mvm->add_stream_txqs)) {
1528 struct iwl_mvm_txq *mvmtxq;
1529 struct ieee80211_txq *txq;
1530 u8 tid;
1531
1532 mvmtxq = list_first_entry(&mvm->add_stream_txqs,
1533 struct iwl_mvm_txq, list);
1534
1535 txq = container_of((void *)mvmtxq, struct ieee80211_txq,
1536 drv_priv);
1537 tid = txq->tid;
1538 if (tid == IEEE80211_NUM_TIDS)
1539 tid = IWL_MAX_TID_COUNT;
1540
1541 /*
1542 * We can't really do much here, but if this fails we can't
1543 * transmit anyway - so just don't transmit the frame etc.
1544 * and let them back up ... we've tried our best to allocate
1545 * a queue in the function itself.
1546 */
1547 if (iwl_mvm_sta_alloc_queue(mvm, txq->sta, txq->ac, tid)) {
1548 spin_lock_bh(&mvm->add_stream_lock);
1549 list_del_init(&mvmtxq->list);
1550 spin_unlock_bh(&mvm->add_stream_lock);
1551 continue;
1552 }
1553
1554 /* now we're ready, any remaining races/concurrency will be
1555 * handled in iwl_mvm_mac_itxq_xmit()
1556 */
1557 set_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
1558
1559 local_bh_disable();
1560 spin_lock(&mvm->add_stream_lock);
1561 list_del_init(&mvmtxq->list);
1562 spin_unlock(&mvm->add_stream_lock);
1563
1564 iwl_mvm_mac_itxq_xmit(mvm->hw, txq);
1565 local_bh_enable();
1566 }
1567
1568 mutex_unlock(&mvm->mutex);
1569 }
1570
iwl_mvm_reserve_sta_stream(struct iwl_mvm * mvm,struct ieee80211_sta * sta,enum nl80211_iftype vif_type)1571 static int iwl_mvm_reserve_sta_stream(struct iwl_mvm *mvm,
1572 struct ieee80211_sta *sta,
1573 enum nl80211_iftype vif_type)
1574 {
1575 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1576 int queue;
1577
1578 /* queue reserving is disabled on new TX path */
1579 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1580 return 0;
1581
1582 /* run the general cleanup/unsharing of queues */
1583 iwl_mvm_inactivity_check(mvm, IWL_INVALID_STA);
1584
1585 /* Make sure we have free resources for this STA */
1586 if (vif_type == NL80211_IFTYPE_STATION && !sta->tdls &&
1587 !mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].tid_bitmap &&
1588 (mvm->queue_info[IWL_MVM_DQA_BSS_CLIENT_QUEUE].status ==
1589 IWL_MVM_QUEUE_FREE))
1590 queue = IWL_MVM_DQA_BSS_CLIENT_QUEUE;
1591 else
1592 queue = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
1593 IWL_MVM_DQA_MIN_DATA_QUEUE,
1594 IWL_MVM_DQA_MAX_DATA_QUEUE);
1595 if (queue < 0) {
1596 /* try again - this time kick out a queue if needed */
1597 queue = iwl_mvm_inactivity_check(mvm, mvmsta->deflink.sta_id);
1598 if (queue < 0) {
1599 IWL_ERR(mvm, "No available queues for new station\n");
1600 return -ENOSPC;
1601 }
1602 }
1603 mvm->queue_info[queue].status = IWL_MVM_QUEUE_RESERVED;
1604
1605 mvmsta->reserved_queue = queue;
1606
1607 IWL_DEBUG_TX_QUEUES(mvm, "Reserving data queue #%d for sta_id %d\n",
1608 queue, mvmsta->deflink.sta_id);
1609
1610 return 0;
1611 }
1612
1613 /*
1614 * In DQA mode, after a HW restart the queues should be allocated as before, in
1615 * order to avoid race conditions when there are shared queues. This function
1616 * does the re-mapping and queue allocation.
1617 *
1618 * Note that re-enabling aggregations isn't done in this function.
1619 */
iwl_mvm_realloc_queues_after_restart(struct iwl_mvm * mvm,struct ieee80211_sta * sta)1620 void iwl_mvm_realloc_queues_after_restart(struct iwl_mvm *mvm,
1621 struct ieee80211_sta *sta)
1622 {
1623 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1624 unsigned int wdg =
1625 iwl_mvm_get_wd_timeout(mvm, mvm_sta->vif);
1626 int i;
1627 struct iwl_trans_txq_scd_cfg cfg = {
1628 .sta_id = mvm_sta->deflink.sta_id,
1629 .frame_limit = IWL_FRAME_LIMIT,
1630 };
1631
1632 /* Make sure reserved queue is still marked as such (if allocated) */
1633 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE)
1634 mvm->queue_info[mvm_sta->reserved_queue].status =
1635 IWL_MVM_QUEUE_RESERVED;
1636
1637 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1638 struct iwl_mvm_tid_data *tid_data = &mvm_sta->tid_data[i];
1639 int txq_id = tid_data->txq_id;
1640 int ac;
1641
1642 if (txq_id == IWL_MVM_INVALID_QUEUE)
1643 continue;
1644
1645 ac = tid_to_mac80211_ac[i];
1646
1647 if (iwl_mvm_has_new_tx_api(mvm)) {
1648 IWL_DEBUG_TX_QUEUES(mvm,
1649 "Re-mapping sta %d tid %d\n",
1650 mvm_sta->deflink.sta_id, i);
1651 txq_id = iwl_mvm_tvqm_enable_txq(mvm, sta,
1652 mvm_sta->deflink.sta_id,
1653 i, wdg);
1654 /*
1655 * on failures, just set it to IWL_MVM_INVALID_QUEUE
1656 * to try again later, we have no other good way of
1657 * failing here
1658 */
1659 if (txq_id < 0)
1660 txq_id = IWL_MVM_INVALID_QUEUE;
1661 tid_data->txq_id = txq_id;
1662
1663 /*
1664 * Since we don't set the seq number after reset, and HW
1665 * sets it now, FW reset will cause the seq num to start
1666 * at 0 again, so driver will need to update it
1667 * internally as well, so it keeps in sync with real val
1668 */
1669 tid_data->seq_number = 0;
1670 } else {
1671 u16 seq = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
1672
1673 cfg.tid = i;
1674 cfg.fifo = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
1675 cfg.aggregate = (txq_id >= IWL_MVM_DQA_MIN_DATA_QUEUE ||
1676 txq_id ==
1677 IWL_MVM_DQA_BSS_CLIENT_QUEUE);
1678
1679 IWL_DEBUG_TX_QUEUES(mvm,
1680 "Re-mapping sta %d tid %d to queue %d\n",
1681 mvm_sta->deflink.sta_id, i,
1682 txq_id);
1683
1684 iwl_mvm_enable_txq(mvm, sta, txq_id, seq, &cfg, wdg);
1685 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
1686 }
1687 }
1688 }
1689
iwl_mvm_add_int_sta_common(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,const u8 * addr,u16 mac_id,u16 color)1690 static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm,
1691 struct iwl_mvm_int_sta *sta,
1692 const u8 *addr,
1693 u16 mac_id, u16 color)
1694 {
1695 struct iwl_mvm_add_sta_cmd cmd;
1696 int ret;
1697 u32 status = ADD_STA_SUCCESS;
1698
1699 lockdep_assert_held(&mvm->mutex);
1700
1701 memset(&cmd, 0, sizeof(cmd));
1702 cmd.sta_id = sta->sta_id;
1703
1704 if (iwl_mvm_has_new_station_api(mvm->fw) &&
1705 sta->type == IWL_STA_AUX_ACTIVITY)
1706 cmd.mac_id_n_color = cpu_to_le32(mac_id);
1707 else
1708 cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id,
1709 color));
1710
1711 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
1712 cmd.station_type = sta->type;
1713
1714 if (!iwl_mvm_has_new_tx_api(mvm))
1715 cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk);
1716 cmd.tid_disable_tx = cpu_to_le16(0xffff);
1717
1718 if (addr)
1719 memcpy(cmd.addr, addr, ETH_ALEN);
1720
1721 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1722 iwl_mvm_add_sta_cmd_size(mvm),
1723 &cmd, &status);
1724 if (ret)
1725 return ret;
1726
1727 switch (status & IWL_ADD_STA_STATUS_MASK) {
1728 case ADD_STA_SUCCESS:
1729 IWL_DEBUG_INFO(mvm, "Internal station added.\n");
1730 return 0;
1731 default:
1732 ret = -EIO;
1733 IWL_ERR(mvm, "Add internal station failed, status=0x%x\n",
1734 status);
1735 break;
1736 }
1737 return ret;
1738 }
1739
1740 /* 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)1741 int iwl_mvm_sta_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1742 struct ieee80211_sta *sta, int sta_id, u8 sta_type)
1743 {
1744 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1745 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1746 struct iwl_mvm_rxq_dup_data *dup_data;
1747 int i, ret = 0;
1748
1749 lockdep_assert_held(&mvm->mutex);
1750
1751 mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id,
1752 mvmvif->color);
1753 mvm_sta->vif = vif;
1754
1755 /* for MLD sta_id(s) should be allocated for each link before calling
1756 * this function
1757 */
1758 if (!mvm->mld_api_is_used) {
1759 if (WARN_ON(sta_id == IWL_INVALID_STA))
1760 return -EINVAL;
1761
1762 mvm_sta->deflink.sta_id = sta_id;
1763 rcu_assign_pointer(mvm_sta->link[0], &mvm_sta->deflink);
1764
1765 if (!mvm->trans->trans_cfg->gen2)
1766 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1767 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1768 else
1769 mvm_sta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
1770 LINK_QUAL_AGG_FRAME_LIMIT_GEN2_DEF;
1771 }
1772
1773 mvm_sta->tt_tx_protection = false;
1774 mvm_sta->sta_type = sta_type;
1775
1776 mvm_sta->tid_disable_agg = 0xffff; /* No aggs at first */
1777
1778 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) {
1779 /*
1780 * Mark all queues for this STA as unallocated and defer TX
1781 * frames until the queue is allocated
1782 */
1783 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
1784 }
1785
1786 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
1787 struct iwl_mvm_txq *mvmtxq =
1788 iwl_mvm_txq_from_mac80211(sta->txq[i]);
1789
1790 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
1791 INIT_LIST_HEAD(&mvmtxq->list);
1792 atomic_set(&mvmtxq->tx_request, 0);
1793 }
1794
1795 if (iwl_mvm_has_new_rx_api(mvm)) {
1796 int q;
1797
1798 dup_data = kcalloc(mvm->trans->num_rx_queues,
1799 sizeof(*dup_data), GFP_KERNEL);
1800 if (!dup_data)
1801 return -ENOMEM;
1802 /*
1803 * Initialize all the last_seq values to 0xffff which can never
1804 * compare equal to the frame's seq_ctrl in the check in
1805 * iwl_mvm_is_dup() since the lower 4 bits are the fragment
1806 * number and fragmented packets don't reach that function.
1807 *
1808 * This thus allows receiving a packet with seqno 0 and the
1809 * retry bit set as the very first packet on a new TID.
1810 */
1811 for (q = 0; q < mvm->trans->num_rx_queues; q++)
1812 memset(dup_data[q].last_seq, 0xff,
1813 sizeof(dup_data[q].last_seq));
1814 mvm_sta->dup_data = dup_data;
1815 }
1816
1817 if (!iwl_mvm_has_new_tx_api(mvm)) {
1818 ret = iwl_mvm_reserve_sta_stream(mvm, sta,
1819 ieee80211_vif_type_p2p(vif));
1820 if (ret)
1821 return ret;
1822 }
1823
1824 /*
1825 * if rs is registered with mac80211, then "add station" will be handled
1826 * via the corresponding ops, otherwise need to notify rate scaling here
1827 */
1828 if (iwl_mvm_has_tlc_offload(mvm))
1829 iwl_mvm_rs_add_sta(mvm, mvm_sta);
1830 else
1831 spin_lock_init(&mvm_sta->deflink.lq_sta.rs_drv.pers.lock);
1832
1833 iwl_mvm_toggle_tx_ant(mvm, &mvm_sta->tx_ant);
1834
1835 /* MPDUs are counted only when EMLSR is possible */
1836 if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
1837 !sta->tdls && ieee80211_vif_is_mld(vif)) {
1838 mvm_sta->mpdu_counters =
1839 kcalloc(mvm->trans->num_rx_queues,
1840 sizeof(*mvm_sta->mpdu_counters),
1841 GFP_KERNEL);
1842 if (mvm_sta->mpdu_counters)
1843 for (int q = 0; q < mvm->trans->num_rx_queues; q++)
1844 spin_lock_init(&mvm_sta->mpdu_counters[q].lock);
1845 }
1846
1847 return 0;
1848 }
1849
iwl_mvm_add_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1850 int iwl_mvm_add_sta(struct iwl_mvm *mvm,
1851 struct ieee80211_vif *vif,
1852 struct ieee80211_sta *sta)
1853 {
1854 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1855 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1856 int ret, sta_id;
1857 bool sta_update = false;
1858 unsigned int sta_flags = 0;
1859
1860 lockdep_assert_held(&mvm->mutex);
1861
1862 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1863 sta_id = iwl_mvm_find_free_sta_id(mvm,
1864 ieee80211_vif_type_p2p(vif));
1865 else
1866 sta_id = mvm_sta->deflink.sta_id;
1867
1868 if (sta_id == IWL_INVALID_STA)
1869 return -ENOSPC;
1870
1871 spin_lock_init(&mvm_sta->lock);
1872
1873 /* if this is a HW restart re-alloc existing queues */
1874 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1875 struct iwl_mvm_int_sta tmp_sta = {
1876 .sta_id = sta_id,
1877 .type = mvm_sta->sta_type,
1878 };
1879
1880 /* First add an empty station since allocating
1881 * a queue requires a valid station
1882 */
1883 ret = iwl_mvm_add_int_sta_common(mvm, &tmp_sta, sta->addr,
1884 mvmvif->id, mvmvif->color);
1885 if (ret)
1886 goto err;
1887
1888 iwl_mvm_realloc_queues_after_restart(mvm, sta);
1889 sta_update = true;
1890 sta_flags = iwl_mvm_has_new_tx_api(mvm) ? 0 : STA_MODIFY_QUEUES;
1891 goto update_fw;
1892 }
1893
1894 ret = iwl_mvm_sta_init(mvm, vif, sta, sta_id,
1895 sta->tdls ? IWL_STA_TDLS_LINK : IWL_STA_LINK);
1896 if (ret)
1897 goto err;
1898
1899 update_fw:
1900 ret = iwl_mvm_sta_send_to_fw(mvm, sta, sta_update, sta_flags);
1901 if (ret)
1902 goto err;
1903
1904 if (vif->type == NL80211_IFTYPE_STATION) {
1905 if (!sta->tdls) {
1906 WARN_ON(mvmvif->deflink.ap_sta_id != IWL_INVALID_STA);
1907 mvmvif->deflink.ap_sta_id = sta_id;
1908 } else {
1909 WARN_ON(mvmvif->deflink.ap_sta_id == IWL_INVALID_STA);
1910 }
1911 }
1912
1913 rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta);
1914
1915 return 0;
1916
1917 err:
1918 return ret;
1919 }
1920
iwl_mvm_drain_sta(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool drain)1921 int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
1922 bool drain)
1923 {
1924 struct iwl_mvm_add_sta_cmd cmd = {};
1925 int ret;
1926 u32 status;
1927
1928 lockdep_assert_held(&mvm->mutex);
1929
1930 cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color);
1931 cmd.sta_id = mvmsta->deflink.sta_id;
1932 cmd.add_modify = STA_MODE_MODIFY;
1933 cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0;
1934 cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW);
1935
1936 status = ADD_STA_SUCCESS;
1937 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
1938 iwl_mvm_add_sta_cmd_size(mvm),
1939 &cmd, &status);
1940 if (ret)
1941 return ret;
1942
1943 switch (status & IWL_ADD_STA_STATUS_MASK) {
1944 case ADD_STA_SUCCESS:
1945 IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n",
1946 mvmsta->deflink.sta_id);
1947 break;
1948 default:
1949 ret = -EIO;
1950 IWL_ERR(mvm, "Couldn't drain frames for staid %d\n",
1951 mvmsta->deflink.sta_id);
1952 break;
1953 }
1954
1955 return ret;
1956 }
1957
1958 /*
1959 * Remove a station from the FW table. Before sending the command to remove
1960 * the station validate that the station is indeed known to the driver (sanity
1961 * only).
1962 */
iwl_mvm_rm_sta_common(struct iwl_mvm * mvm,u8 sta_id)1963 static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id)
1964 {
1965 struct ieee80211_sta *sta;
1966 struct iwl_mvm_rm_sta_cmd rm_sta_cmd = {
1967 .sta_id = sta_id,
1968 };
1969 int ret;
1970
1971 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
1972 lockdep_is_held(&mvm->mutex));
1973
1974 /* Note: internal stations are marked as error values */
1975 if (!sta) {
1976 IWL_ERR(mvm, "Invalid station id\n");
1977 return -EINVAL;
1978 }
1979
1980 ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0,
1981 sizeof(rm_sta_cmd), &rm_sta_cmd);
1982 if (ret) {
1983 IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id);
1984 return ret;
1985 }
1986
1987 return 0;
1988 }
1989
iwl_mvm_disable_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)1990 static void iwl_mvm_disable_sta_queues(struct iwl_mvm *mvm,
1991 struct ieee80211_vif *vif,
1992 struct ieee80211_sta *sta)
1993 {
1994 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
1995 int i;
1996
1997 lockdep_assert_held(&mvm->mutex);
1998
1999 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2000 if (mvm_sta->tid_data[i].txq_id == IWL_MVM_INVALID_QUEUE)
2001 continue;
2002
2003 iwl_mvm_disable_txq(mvm, sta, mvm_sta->deflink.sta_id,
2004 &mvm_sta->tid_data[i].txq_id, i);
2005 mvm_sta->tid_data[i].txq_id = IWL_MVM_INVALID_QUEUE;
2006 }
2007
2008 for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
2009 struct iwl_mvm_txq *mvmtxq =
2010 iwl_mvm_txq_from_mac80211(sta->txq[i]);
2011
2012 spin_lock_bh(&mvm->add_stream_lock);
2013 mvmtxq->txq_id = IWL_MVM_INVALID_QUEUE;
2014 list_del_init(&mvmtxq->list);
2015 clear_bit(IWL_MVM_TXQ_STATE_READY, &mvmtxq->state);
2016 spin_unlock_bh(&mvm->add_stream_lock);
2017 }
2018 }
2019
iwl_mvm_wait_sta_queues_empty(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvm_sta)2020 int iwl_mvm_wait_sta_queues_empty(struct iwl_mvm *mvm,
2021 struct iwl_mvm_sta *mvm_sta)
2022 {
2023 int i;
2024
2025 for (i = 0; i < ARRAY_SIZE(mvm_sta->tid_data); i++) {
2026 u16 txq_id;
2027 int ret;
2028
2029 spin_lock_bh(&mvm_sta->lock);
2030 txq_id = mvm_sta->tid_data[i].txq_id;
2031 spin_unlock_bh(&mvm_sta->lock);
2032
2033 if (txq_id == IWL_MVM_INVALID_QUEUE)
2034 continue;
2035
2036 ret = iwl_trans_wait_txq_empty(mvm->trans, txq_id);
2037 if (ret)
2038 return ret;
2039 }
2040
2041 return 0;
2042 }
2043
2044 /* Execute the common part for both MLD and non-MLD modes.
2045 * Returns if we're done with removing the station, either
2046 * with error or success
2047 */
iwl_mvm_sta_del(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_link_sta * link_sta,int * ret)2048 bool iwl_mvm_sta_del(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2049 struct ieee80211_sta *sta,
2050 struct ieee80211_link_sta *link_sta, int *ret)
2051 {
2052 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2053 struct iwl_mvm_vif_link_info *mvm_link =
2054 mvmvif->link[link_sta->link_id];
2055 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2056 struct iwl_mvm_link_sta *mvm_link_sta;
2057 u8 sta_id;
2058
2059 lockdep_assert_held(&mvm->mutex);
2060
2061 mvm_link_sta =
2062 rcu_dereference_protected(mvm_sta->link[link_sta->link_id],
2063 lockdep_is_held(&mvm->mutex));
2064 sta_id = mvm_link_sta->sta_id;
2065
2066 /* If there is a TXQ still marked as reserved - free it */
2067 if (mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) {
2068 u8 reserved_txq = mvm_sta->reserved_queue;
2069 enum iwl_mvm_queue_status *status;
2070
2071 /*
2072 * If no traffic has gone through the reserved TXQ - it
2073 * is still marked as IWL_MVM_QUEUE_RESERVED, and
2074 * should be manually marked as free again
2075 */
2076 status = &mvm->queue_info[reserved_txq].status;
2077 if (WARN((*status != IWL_MVM_QUEUE_RESERVED) &&
2078 (*status != IWL_MVM_QUEUE_FREE),
2079 "sta_id %d reserved txq %d status %d",
2080 sta_id, reserved_txq, *status)) {
2081 *ret = -EINVAL;
2082 return true;
2083 }
2084
2085 *status = IWL_MVM_QUEUE_FREE;
2086 }
2087
2088 if (vif->type == NL80211_IFTYPE_STATION &&
2089 mvm_link->ap_sta_id == sta_id) {
2090 /* if associated - we can't remove the AP STA now */
2091 if (vif->cfg.assoc)
2092 return true;
2093
2094 /* first remove remaining keys */
2095 iwl_mvm_sec_key_remove_ap(mvm, vif, mvm_link, 0);
2096
2097 /* unassoc - go ahead - remove the AP STA now */
2098 mvm_link->ap_sta_id = IWL_INVALID_STA;
2099 }
2100
2101 /*
2102 * This shouldn't happen - the TDLS channel switch should be canceled
2103 * before the STA is removed.
2104 */
2105 if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == sta_id)) {
2106 mvm->tdls_cs.peer.sta_id = IWL_INVALID_STA;
2107 cancel_delayed_work(&mvm->tdls_cs.dwork);
2108 }
2109
2110 return false;
2111 }
2112
iwl_mvm_rm_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)2113 int iwl_mvm_rm_sta(struct iwl_mvm *mvm,
2114 struct ieee80211_vif *vif,
2115 struct ieee80211_sta *sta)
2116 {
2117 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2118 int ret;
2119
2120 lockdep_assert_held(&mvm->mutex);
2121
2122 ret = iwl_mvm_drain_sta(mvm, mvm_sta, true);
2123 if (ret)
2124 return ret;
2125
2126 /* flush its queues here since we are freeing mvm_sta */
2127 ret = iwl_mvm_flush_sta(mvm, mvm_sta->deflink.sta_id,
2128 mvm_sta->tfd_queue_msk);
2129 if (ret)
2130 return ret;
2131 if (iwl_mvm_has_new_tx_api(mvm)) {
2132 ret = iwl_mvm_wait_sta_queues_empty(mvm, mvm_sta);
2133 } else {
2134 u32 q_mask = mvm_sta->tfd_queue_msk;
2135
2136 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
2137 q_mask);
2138 }
2139 if (ret)
2140 return ret;
2141
2142 ret = iwl_mvm_drain_sta(mvm, mvm_sta, false);
2143
2144 iwl_mvm_disable_sta_queues(mvm, vif, sta);
2145
2146 if (iwl_mvm_sta_del(mvm, vif, sta, &sta->deflink, &ret))
2147 return ret;
2148
2149 ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->deflink.sta_id);
2150 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->deflink.sta_id], NULL);
2151
2152 return ret;
2153 }
2154
iwl_mvm_rm_sta_id(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u8 sta_id)2155 int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm,
2156 struct ieee80211_vif *vif,
2157 u8 sta_id)
2158 {
2159 int ret = iwl_mvm_rm_sta_common(mvm, sta_id);
2160
2161 lockdep_assert_held(&mvm->mutex);
2162
2163 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL);
2164 return ret;
2165 }
2166
iwl_mvm_allocate_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta,u32 qmask,enum nl80211_iftype iftype,u8 type)2167 int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm,
2168 struct iwl_mvm_int_sta *sta,
2169 u32 qmask, enum nl80211_iftype iftype,
2170 u8 type)
2171 {
2172 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
2173 sta->sta_id == IWL_INVALID_STA) {
2174 sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype);
2175 if (WARN_ON_ONCE(sta->sta_id == IWL_INVALID_STA))
2176 return -ENOSPC;
2177 }
2178
2179 sta->tfd_queue_msk = qmask;
2180 sta->type = type;
2181
2182 /* put a non-NULL value so iterating over the stations won't stop */
2183 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL));
2184 return 0;
2185 }
2186
iwl_mvm_dealloc_int_sta(struct iwl_mvm * mvm,struct iwl_mvm_int_sta * sta)2187 void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta)
2188 {
2189 RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL);
2190 memset(sta, 0, sizeof(struct iwl_mvm_int_sta));
2191 sta->sta_id = IWL_INVALID_STA;
2192 }
2193
iwl_mvm_enable_aux_snif_queue(struct iwl_mvm * mvm,u16 queue,u8 sta_id,u8 fifo)2194 static void iwl_mvm_enable_aux_snif_queue(struct iwl_mvm *mvm, u16 queue,
2195 u8 sta_id, u8 fifo)
2196 {
2197 unsigned int wdg_timeout =
2198 mvm->trans->trans_cfg->base_params->wd_timeout;
2199 struct iwl_trans_txq_scd_cfg cfg = {
2200 .fifo = fifo,
2201 .sta_id = sta_id,
2202 .tid = IWL_MAX_TID_COUNT,
2203 .aggregate = false,
2204 .frame_limit = IWL_FRAME_LIMIT,
2205 };
2206
2207 WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2208
2209 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2210 }
2211
iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm * mvm,u8 sta_id)2212 static int iwl_mvm_enable_aux_snif_queue_tvqm(struct iwl_mvm *mvm, u8 sta_id)
2213 {
2214 unsigned int wdg_timeout =
2215 mvm->trans->trans_cfg->base_params->wd_timeout;
2216
2217 WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2218
2219 return iwl_mvm_tvqm_enable_txq(mvm, NULL, sta_id, IWL_MAX_TID_COUNT,
2220 wdg_timeout);
2221 }
2222
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)2223 static int iwl_mvm_add_int_sta_with_queue(struct iwl_mvm *mvm, int macidx,
2224 int maccolor, u8 *addr,
2225 struct iwl_mvm_int_sta *sta,
2226 u16 *queue, int fifo)
2227 {
2228 int ret;
2229
2230 /* Map queue to fifo - needs to happen before adding station */
2231 if (!iwl_mvm_has_new_tx_api(mvm))
2232 iwl_mvm_enable_aux_snif_queue(mvm, *queue, sta->sta_id, fifo);
2233
2234 ret = iwl_mvm_add_int_sta_common(mvm, sta, addr, macidx, maccolor);
2235 if (ret) {
2236 if (!iwl_mvm_has_new_tx_api(mvm))
2237 iwl_mvm_disable_txq(mvm, NULL, sta->sta_id, queue,
2238 IWL_MAX_TID_COUNT);
2239 return ret;
2240 }
2241
2242 /*
2243 * For 22000 firmware and on we cannot add queue to a station unknown
2244 * to firmware so enable queue here - after the station was added
2245 */
2246 if (iwl_mvm_has_new_tx_api(mvm)) {
2247 int txq;
2248
2249 txq = iwl_mvm_enable_aux_snif_queue_tvqm(mvm, sta->sta_id);
2250 if (txq < 0) {
2251 iwl_mvm_rm_sta_common(mvm, sta->sta_id);
2252 return txq;
2253 }
2254
2255 *queue = txq;
2256 }
2257
2258 return 0;
2259 }
2260
iwl_mvm_add_aux_sta(struct iwl_mvm * mvm,u32 lmac_id)2261 int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm, u32 lmac_id)
2262 {
2263 int ret;
2264 u32 qmask = mvm->aux_queue == IWL_MVM_INVALID_QUEUE ? 0 :
2265 BIT(mvm->aux_queue);
2266
2267 lockdep_assert_held(&mvm->mutex);
2268
2269 /* Allocate aux station and assign to it the aux queue */
2270 ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, qmask,
2271 NL80211_IFTYPE_UNSPECIFIED,
2272 IWL_STA_AUX_ACTIVITY);
2273 if (ret)
2274 return ret;
2275
2276 /*
2277 * In CDB NICs we need to specify which lmac to use for aux activity
2278 * using the mac_id argument place to send lmac_id to the function
2279 */
2280 ret = iwl_mvm_add_int_sta_with_queue(mvm, lmac_id, 0, NULL,
2281 &mvm->aux_sta, &mvm->aux_queue,
2282 IWL_MVM_TX_FIFO_MCAST);
2283 if (ret) {
2284 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2285 return ret;
2286 }
2287
2288 return 0;
2289 }
2290
iwl_mvm_add_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2291 int iwl_mvm_add_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2292 {
2293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2294
2295 lockdep_assert_held(&mvm->mutex);
2296
2297 return iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id, mvmvif->color,
2298 NULL, &mvm->snif_sta,
2299 &mvm->snif_queue,
2300 IWL_MVM_TX_FIFO_BE);
2301 }
2302
iwl_mvm_rm_snif_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2303 int iwl_mvm_rm_snif_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2304 {
2305 int ret;
2306
2307 lockdep_assert_held(&mvm->mutex);
2308
2309 if (WARN_ON_ONCE(mvm->snif_sta.sta_id == IWL_INVALID_STA))
2310 return -EINVAL;
2311
2312 iwl_mvm_disable_txq(mvm, NULL, mvm->snif_sta.sta_id,
2313 &mvm->snif_queue, IWL_MAX_TID_COUNT);
2314 ret = iwl_mvm_rm_sta_common(mvm, mvm->snif_sta.sta_id);
2315 if (ret)
2316 IWL_WARN(mvm, "Failed sending remove station\n");
2317
2318 return ret;
2319 }
2320
iwl_mvm_rm_aux_sta(struct iwl_mvm * mvm)2321 int iwl_mvm_rm_aux_sta(struct iwl_mvm *mvm)
2322 {
2323 int ret;
2324
2325 lockdep_assert_held(&mvm->mutex);
2326
2327 if (WARN_ON_ONCE(mvm->aux_sta.sta_id == IWL_INVALID_STA))
2328 return -EINVAL;
2329
2330 iwl_mvm_disable_txq(mvm, NULL, mvm->aux_sta.sta_id,
2331 &mvm->aux_queue, IWL_MAX_TID_COUNT);
2332 ret = iwl_mvm_rm_sta_common(mvm, mvm->aux_sta.sta_id);
2333 if (ret)
2334 IWL_WARN(mvm, "Failed sending remove station\n");
2335 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
2336
2337 return ret;
2338 }
2339
iwl_mvm_dealloc_snif_sta(struct iwl_mvm * mvm)2340 void iwl_mvm_dealloc_snif_sta(struct iwl_mvm *mvm)
2341 {
2342 iwl_mvm_dealloc_int_sta(mvm, &mvm->snif_sta);
2343 }
2344
2345 /*
2346 * Send the add station command for the vif's broadcast station.
2347 * Assumes that the station was already allocated.
2348 *
2349 * @mvm: the mvm component
2350 * @vif: the interface to which the broadcast station is added
2351 * @bsta: the broadcast station to add.
2352 */
iwl_mvm_send_add_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2353 int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2354 {
2355 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2356 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2357 static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
2358 const u8 *baddr = _baddr;
2359 int queue;
2360 int ret;
2361 unsigned int wdg_timeout =
2362 iwl_mvm_get_wd_timeout(mvm, vif);
2363 struct iwl_trans_txq_scd_cfg cfg = {
2364 .fifo = IWL_MVM_TX_FIFO_VO,
2365 .sta_id = mvmvif->deflink.bcast_sta.sta_id,
2366 .tid = IWL_MAX_TID_COUNT,
2367 .aggregate = false,
2368 .frame_limit = IWL_FRAME_LIMIT,
2369 };
2370
2371 lockdep_assert_held(&mvm->mutex);
2372
2373 if (!iwl_mvm_has_new_tx_api(mvm)) {
2374 if (vif->type == NL80211_IFTYPE_AP ||
2375 vif->type == NL80211_IFTYPE_ADHOC) {
2376 queue = mvm->probe_queue;
2377 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2378 queue = mvm->p2p_dev_queue;
2379 } else {
2380 WARN(1, "Missing required TXQ for adding bcast STA\n");
2381 return -EINVAL;
2382 }
2383
2384 bsta->tfd_queue_msk |= BIT(queue);
2385
2386 iwl_mvm_enable_txq(mvm, NULL, queue, 0, &cfg, wdg_timeout);
2387 }
2388
2389 if (vif->type == NL80211_IFTYPE_ADHOC)
2390 baddr = vif->bss_conf.bssid;
2391
2392 if (WARN_ON_ONCE(bsta->sta_id == IWL_INVALID_STA))
2393 return -ENOSPC;
2394
2395 ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr,
2396 mvmvif->id, mvmvif->color);
2397 if (ret)
2398 return ret;
2399
2400 /*
2401 * For 22000 firmware and on we cannot add queue to a station unknown
2402 * to firmware so enable queue here - after the station was added
2403 */
2404 if (iwl_mvm_has_new_tx_api(mvm)) {
2405 queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, bsta->sta_id,
2406 IWL_MAX_TID_COUNT,
2407 wdg_timeout);
2408 if (queue < 0) {
2409 iwl_mvm_rm_sta_common(mvm, bsta->sta_id);
2410 return queue;
2411 }
2412
2413 if (vif->type == NL80211_IFTYPE_AP ||
2414 vif->type == NL80211_IFTYPE_ADHOC) {
2415 /* for queue management */
2416 mvm->probe_queue = queue;
2417 /* for use in TX */
2418 mvmvif->deflink.mgmt_queue = queue;
2419 } else if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2420 mvm->p2p_dev_queue = queue;
2421 }
2422 } else if (vif->type == NL80211_IFTYPE_AP ||
2423 vif->type == NL80211_IFTYPE_ADHOC) {
2424 /* set it for use in TX */
2425 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2426 }
2427
2428 return 0;
2429 }
2430
iwl_mvm_free_bcast_sta_queues(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2431 void iwl_mvm_free_bcast_sta_queues(struct iwl_mvm *mvm,
2432 struct ieee80211_vif *vif)
2433 {
2434 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2435 u16 *queueptr, queue;
2436
2437 lockdep_assert_held(&mvm->mutex);
2438
2439 iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id,
2440 mvmvif->deflink.bcast_sta.tfd_queue_msk);
2441
2442 switch (vif->type) {
2443 case NL80211_IFTYPE_AP:
2444 case NL80211_IFTYPE_ADHOC:
2445 queueptr = &mvm->probe_queue;
2446 break;
2447 case NL80211_IFTYPE_P2P_DEVICE:
2448 queueptr = &mvm->p2p_dev_queue;
2449 break;
2450 default:
2451 WARN(1, "Can't free bcast queue on vif type %d\n",
2452 vif->type);
2453 return;
2454 }
2455
2456 queue = *queueptr;
2457 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.bcast_sta.sta_id,
2458 queueptr, IWL_MAX_TID_COUNT);
2459
2460 if (vif->type == NL80211_IFTYPE_AP || vif->type == NL80211_IFTYPE_ADHOC)
2461 mvmvif->deflink.mgmt_queue = mvm->probe_queue;
2462
2463 if (iwl_mvm_has_new_tx_api(mvm))
2464 return;
2465
2466 WARN_ON(!(mvmvif->deflink.bcast_sta.tfd_queue_msk & BIT(queue)));
2467 mvmvif->deflink.bcast_sta.tfd_queue_msk &= ~BIT(queue);
2468 }
2469
2470 /* Send the FW a request to remove the station from it's internal data
2471 * 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)2472 int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2473 {
2474 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2475 int ret;
2476
2477 lockdep_assert_held(&mvm->mutex);
2478
2479 iwl_mvm_free_bcast_sta_queues(mvm, vif);
2480
2481 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.bcast_sta.sta_id);
2482 if (ret)
2483 IWL_WARN(mvm, "Failed sending remove station\n");
2484 return ret;
2485 }
2486
iwl_mvm_alloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2487 int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2488 {
2489 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2490
2491 lockdep_assert_held(&mvm->mutex);
2492
2493 return iwl_mvm_allocate_int_sta(mvm, &mvmvif->deflink.bcast_sta, 0,
2494 ieee80211_vif_type_p2p(vif),
2495 IWL_STA_GENERAL_PURPOSE);
2496 }
2497
2498 /* Allocate a new station entry for the broadcast station to the given vif,
2499 * and send it to the FW.
2500 * Note that each P2P mac should have its own broadcast station.
2501 *
2502 * @mvm: the mvm component
2503 * @vif: the interface to which the broadcast station is added
2504 * @bsta: the broadcast station to add. */
iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2505 int iwl_mvm_add_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2506 {
2507 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2508 struct iwl_mvm_int_sta *bsta = &mvmvif->deflink.bcast_sta;
2509 int ret;
2510
2511 lockdep_assert_held(&mvm->mutex);
2512
2513 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
2514 if (ret)
2515 return ret;
2516
2517 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2518
2519 if (ret)
2520 iwl_mvm_dealloc_int_sta(mvm, bsta);
2521
2522 return ret;
2523 }
2524
iwl_mvm_dealloc_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2525 void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2526 {
2527 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2528
2529 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->deflink.bcast_sta);
2530 }
2531
2532 /*
2533 * Send the FW a request to remove the station from it's internal data
2534 * structures, and in addition remove it from the local data structure.
2535 */
iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2536 int iwl_mvm_rm_p2p_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2537 {
2538 int ret;
2539
2540 lockdep_assert_held(&mvm->mutex);
2541
2542 ret = iwl_mvm_send_rm_bcast_sta(mvm, vif);
2543
2544 iwl_mvm_dealloc_bcast_sta(mvm, vif);
2545
2546 return ret;
2547 }
2548
2549 /*
2550 * Allocate a new station entry for the multicast station to the given vif,
2551 * and send it to the FW.
2552 * Note that each AP/GO mac should have its own multicast station.
2553 *
2554 * @mvm: the mvm component
2555 * @vif: the interface to which the multicast station is added
2556 */
iwl_mvm_add_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2557 int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2558 {
2559 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2560 struct iwl_mvm_int_sta *msta = &mvmvif->deflink.mcast_sta;
2561 static const u8 _maddr[] = {0x03, 0x00, 0x00, 0x00, 0x00, 0x00};
2562 const u8 *maddr = _maddr;
2563 struct iwl_trans_txq_scd_cfg cfg = {
2564 .fifo = vif->type == NL80211_IFTYPE_AP ?
2565 IWL_MVM_TX_FIFO_MCAST : IWL_MVM_TX_FIFO_BE,
2566 .sta_id = msta->sta_id,
2567 .tid = 0,
2568 .aggregate = false,
2569 .frame_limit = IWL_FRAME_LIMIT,
2570 };
2571 unsigned int timeout = iwl_mvm_get_wd_timeout(mvm, vif);
2572 int ret;
2573
2574 lockdep_assert_held(&mvm->mutex);
2575
2576 if (WARN_ON(vif->type != NL80211_IFTYPE_AP &&
2577 vif->type != NL80211_IFTYPE_ADHOC))
2578 return -EOPNOTSUPP;
2579
2580 /*
2581 * In IBSS, ieee80211_check_queues() sets the cab_queue to be
2582 * invalid, so make sure we use the queue we want.
2583 * Note that this is done here as we want to avoid making DQA
2584 * changes in mac80211 layer.
2585 */
2586 if (vif->type == NL80211_IFTYPE_ADHOC)
2587 mvmvif->deflink.cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
2588
2589 /*
2590 * While in previous FWs we had to exclude cab queue from TFD queue
2591 * mask, now it is needed as any other queue.
2592 */
2593 if (!iwl_mvm_has_new_tx_api(mvm) &&
2594 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) {
2595 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2596 &cfg,
2597 timeout);
2598 msta->tfd_queue_msk |= BIT(mvmvif->deflink.cab_queue);
2599 }
2600 ret = iwl_mvm_add_int_sta_common(mvm, msta, maddr,
2601 mvmvif->id, mvmvif->color);
2602 if (ret)
2603 goto err;
2604
2605 /*
2606 * Enable cab queue after the ADD_STA command is sent.
2607 * This is needed for 22000 firmware which won't accept SCD_QUEUE_CFG
2608 * command with unknown station id, and for FW that doesn't support
2609 * station API since the cab queue is not included in the
2610 * tfd_queue_mask.
2611 */
2612 if (iwl_mvm_has_new_tx_api(mvm)) {
2613 int queue = iwl_mvm_tvqm_enable_txq(mvm, NULL, msta->sta_id,
2614 0, timeout);
2615 if (queue < 0) {
2616 ret = queue;
2617 goto err;
2618 }
2619 mvmvif->deflink.cab_queue = queue;
2620 } else if (!fw_has_api(&mvm->fw->ucode_capa,
2621 IWL_UCODE_TLV_API_STA_TYPE))
2622 iwl_mvm_enable_txq(mvm, NULL, mvmvif->deflink.cab_queue, 0,
2623 &cfg,
2624 timeout);
2625
2626 return 0;
2627 err:
2628 iwl_mvm_dealloc_int_sta(mvm, msta);
2629 return ret;
2630 }
2631
__iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,u8 sta_id,struct ieee80211_key_conf * keyconf,bool mcast)2632 static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id,
2633 struct ieee80211_key_conf *keyconf,
2634 bool mcast)
2635 {
2636 union {
2637 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
2638 struct iwl_mvm_add_sta_key_cmd cmd;
2639 } u = {};
2640 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
2641 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
2642 __le16 key_flags;
2643 int ret, size;
2644 u32 status;
2645
2646 /* This is a valid situation for GTK removal */
2647 if (sta_id == IWL_INVALID_STA)
2648 return 0;
2649
2650 key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) &
2651 STA_KEY_FLG_KEYID_MSK);
2652 key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP);
2653 key_flags |= cpu_to_le16(STA_KEY_NOT_VALID);
2654
2655 if (mcast)
2656 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
2657
2658 /*
2659 * The fields assigned here are in the same location at the start
2660 * of the command, so we can do this union trick.
2661 */
2662 u.cmd.common.key_flags = key_flags;
2663 u.cmd.common.key_offset = keyconf->hw_key_idx;
2664 u.cmd.common.sta_id = sta_id;
2665
2666 size = new_api ? sizeof(u.cmd) : sizeof(u.cmd_v1);
2667
2668 status = ADD_STA_SUCCESS;
2669 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size, &u.cmd,
2670 &status);
2671
2672 switch (status) {
2673 case ADD_STA_SUCCESS:
2674 IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n");
2675 break;
2676 default:
2677 ret = -EIO;
2678 IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n");
2679 break;
2680 }
2681
2682 return ret;
2683 }
2684
2685 /*
2686 * Send the FW a request to remove the station from it's internal data
2687 * structures, and in addition remove it from the local data structure.
2688 */
iwl_mvm_rm_mcast_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2689 int iwl_mvm_rm_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
2690 {
2691 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2692 int ret;
2693
2694 lockdep_assert_held(&mvm->mutex);
2695
2696 iwl_mvm_flush_sta(mvm, mvmvif->deflink.mcast_sta.sta_id,
2697 mvmvif->deflink.mcast_sta.tfd_queue_msk);
2698
2699 iwl_mvm_disable_txq(mvm, NULL, mvmvif->deflink.mcast_sta.sta_id,
2700 &mvmvif->deflink.cab_queue, 0);
2701
2702 ret = iwl_mvm_rm_sta_common(mvm, mvmvif->deflink.mcast_sta.sta_id);
2703 if (ret)
2704 IWL_WARN(mvm, "Failed sending remove station\n");
2705
2706 return ret;
2707 }
2708
iwl_mvm_sync_rxq_del_ba(struct iwl_mvm * mvm,u8 baid)2709 static void iwl_mvm_sync_rxq_del_ba(struct iwl_mvm *mvm, u8 baid)
2710 {
2711 struct iwl_mvm_delba_data notif = {
2712 .baid = baid,
2713 };
2714
2715 iwl_mvm_sync_rx_queues_internal(mvm, IWL_MVM_RXQ_NOTIF_DEL_BA, true,
2716 ¬if, sizeof(notif));
2717 };
2718
iwl_mvm_free_reorder(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data)2719 static void iwl_mvm_free_reorder(struct iwl_mvm *mvm,
2720 struct iwl_mvm_baid_data *data)
2721 {
2722 int i;
2723
2724 iwl_mvm_sync_rxq_del_ba(mvm, data->baid);
2725
2726 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2727 int j;
2728 struct iwl_mvm_reorder_buffer *reorder_buf =
2729 &data->reorder_buf[i];
2730 struct iwl_mvm_reorder_buf_entry *entries =
2731 &data->entries[i * data->entries_per_queue];
2732
2733 spin_lock_bh(&reorder_buf->lock);
2734 if (likely(!reorder_buf->num_stored)) {
2735 spin_unlock_bh(&reorder_buf->lock);
2736 continue;
2737 }
2738
2739 /*
2740 * This shouldn't happen in regular DELBA since the internal
2741 * delBA notification should trigger a release of all frames in
2742 * the reorder buffer.
2743 */
2744 WARN_ON(1);
2745
2746 for (j = 0; j < data->buf_size; j++)
2747 __skb_queue_purge(&entries[j].frames);
2748
2749 spin_unlock_bh(&reorder_buf->lock);
2750 }
2751 }
2752
iwl_mvm_init_reorder_buffer(struct iwl_mvm * mvm,struct iwl_mvm_baid_data * data,u16 ssn)2753 static void iwl_mvm_init_reorder_buffer(struct iwl_mvm *mvm,
2754 struct iwl_mvm_baid_data *data,
2755 u16 ssn)
2756 {
2757 int i;
2758
2759 for (i = 0; i < mvm->trans->num_rx_queues; i++) {
2760 struct iwl_mvm_reorder_buffer *reorder_buf =
2761 &data->reorder_buf[i];
2762 struct iwl_mvm_reorder_buf_entry *entries =
2763 &data->entries[i * data->entries_per_queue];
2764 int j;
2765
2766 reorder_buf->num_stored = 0;
2767 reorder_buf->head_sn = ssn;
2768 spin_lock_init(&reorder_buf->lock);
2769 reorder_buf->queue = i;
2770 reorder_buf->valid = false;
2771 for (j = 0; j < data->buf_size; j++)
2772 __skb_queue_head_init(&entries[j].frames);
2773 }
2774 }
2775
iwl_mvm_fw_baid_op_sta(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size)2776 static int iwl_mvm_fw_baid_op_sta(struct iwl_mvm *mvm,
2777 struct ieee80211_sta *sta,
2778 bool start, int tid, u16 ssn,
2779 u16 buf_size)
2780 {
2781 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2782 struct iwl_mvm_add_sta_cmd cmd = {
2783 .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color),
2784 .sta_id = mvm_sta->deflink.sta_id,
2785 .add_modify = STA_MODE_MODIFY,
2786 };
2787 u32 status;
2788 int ret;
2789
2790 if (start) {
2791 cmd.add_immediate_ba_tid = tid;
2792 cmd.add_immediate_ba_ssn = cpu_to_le16(ssn);
2793 cmd.rx_ba_window = cpu_to_le16(buf_size);
2794 cmd.modify_mask = STA_MODIFY_ADD_BA_TID;
2795 } else {
2796 cmd.remove_immediate_ba_tid = tid;
2797 cmd.modify_mask = STA_MODIFY_REMOVE_BA_TID;
2798 }
2799
2800 status = ADD_STA_SUCCESS;
2801 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
2802 iwl_mvm_add_sta_cmd_size(mvm),
2803 &cmd, &status);
2804 if (ret)
2805 return ret;
2806
2807 switch (status & IWL_ADD_STA_STATUS_MASK) {
2808 case ADD_STA_SUCCESS:
2809 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2810 start ? "start" : "stopp");
2811 if (WARN_ON(start && iwl_mvm_has_new_rx_api(mvm) &&
2812 !(status & IWL_ADD_STA_BAID_VALID_MASK)))
2813 return -EINVAL;
2814 return u32_get_bits(status, IWL_ADD_STA_BAID_MASK);
2815 case ADD_STA_IMMEDIATE_BA_FAILURE:
2816 IWL_WARN(mvm, "RX BA Session refused by fw\n");
2817 return -ENOSPC;
2818 default:
2819 IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n",
2820 start ? "start" : "stopp", status);
2821 return -EIO;
2822 }
2823 }
2824
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)2825 static int iwl_mvm_fw_baid_op_cmd(struct iwl_mvm *mvm,
2826 struct ieee80211_sta *sta,
2827 bool start, int tid, u16 ssn,
2828 u16 buf_size, int baid)
2829 {
2830 struct iwl_rx_baid_cfg_cmd cmd = {
2831 .action = start ? cpu_to_le32(IWL_RX_BAID_ACTION_ADD) :
2832 cpu_to_le32(IWL_RX_BAID_ACTION_REMOVE),
2833 };
2834 struct iwl_host_cmd hcmd = {
2835 .id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD),
2836 .flags = CMD_SEND_IN_RFKILL,
2837 .len[0] = sizeof(cmd),
2838 .data[0] = &cmd,
2839 };
2840 int ret;
2841
2842 BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
2843
2844 if (start) {
2845 cmd.alloc.sta_id_mask =
2846 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2847 cmd.alloc.tid = tid;
2848 cmd.alloc.ssn = cpu_to_le16(ssn);
2849 cmd.alloc.win_size = cpu_to_le16(buf_size);
2850 baid = -EIO;
2851 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 1) == 1) {
2852 cmd.remove_v1.baid = cpu_to_le32(baid);
2853 BUILD_BUG_ON(sizeof(cmd.remove_v1) > sizeof(cmd.remove));
2854 } else {
2855 cmd.remove.sta_id_mask =
2856 cpu_to_le32(iwl_mvm_sta_fw_id_mask(mvm, sta, -1));
2857 cmd.remove.tid = cpu_to_le32(tid);
2858 }
2859
2860 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &baid);
2861 if (ret)
2862 return ret;
2863
2864 if (!start) {
2865 /* ignore firmware baid on remove */
2866 baid = 0;
2867 }
2868
2869 IWL_DEBUG_HT(mvm, "RX BA Session %sed in fw\n",
2870 start ? "start" : "stopp");
2871
2872 if (baid < 0 || baid >= ARRAY_SIZE(mvm->baid_map))
2873 return -EINVAL;
2874
2875 return baid;
2876 }
2877
iwl_mvm_fw_baid_op(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool start,int tid,u16 ssn,u16 buf_size,int baid)2878 static int iwl_mvm_fw_baid_op(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2879 bool start, int tid, u16 ssn, u16 buf_size,
2880 int baid)
2881 {
2882 if (fw_has_capa(&mvm->fw->ucode_capa,
2883 IWL_UCODE_TLV_CAPA_BAID_ML_SUPPORT))
2884 return iwl_mvm_fw_baid_op_cmd(mvm, sta, start,
2885 tid, ssn, buf_size, baid);
2886
2887 return iwl_mvm_fw_baid_op_sta(mvm, sta, start,
2888 tid, ssn, buf_size);
2889 }
2890
iwl_mvm_sta_rx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u16 ssn,bool start,u16 buf_size,u16 timeout)2891 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
2892 int tid, u16 ssn, bool start, u16 buf_size, u16 timeout)
2893 {
2894 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2895 struct iwl_mvm_baid_data *baid_data = NULL;
2896 int ret, baid;
2897 u32 max_ba_id_sessions = iwl_mvm_has_new_tx_api(mvm) ? IWL_MAX_BAID :
2898 IWL_MAX_BAID_OLD;
2899
2900 lockdep_assert_held(&mvm->mutex);
2901
2902 if (start && mvm->rx_ba_sessions >= max_ba_id_sessions) {
2903 IWL_WARN(mvm, "Not enough RX BA SESSIONS\n");
2904 return -ENOSPC;
2905 }
2906
2907 if (iwl_mvm_has_new_rx_api(mvm) && start) {
2908 u32 reorder_buf_size = buf_size * sizeof(baid_data->entries[0]);
2909
2910 /* sparse doesn't like the __align() so don't check */
2911 #ifndef __CHECKER__
2912 /*
2913 * The division below will be OK if either the cache line size
2914 * can be divided by the entry size (ALIGN will round up) or if
2915 * if the entry size can be divided by the cache line size, in
2916 * which case the ALIGN() will do nothing.
2917 */
2918 BUILD_BUG_ON(SMP_CACHE_BYTES % sizeof(baid_data->entries[0]) &&
2919 sizeof(baid_data->entries[0]) % SMP_CACHE_BYTES);
2920 #endif
2921
2922 /*
2923 * Upward align the reorder buffer size to fill an entire cache
2924 * line for each queue, to avoid sharing cache lines between
2925 * different queues.
2926 */
2927 reorder_buf_size = ALIGN(reorder_buf_size, SMP_CACHE_BYTES);
2928
2929 /*
2930 * Allocate here so if allocation fails we can bail out early
2931 * before starting the BA session in the firmware
2932 */
2933 baid_data = kzalloc(sizeof(*baid_data) +
2934 mvm->trans->num_rx_queues *
2935 reorder_buf_size,
2936 GFP_KERNEL);
2937 if (!baid_data)
2938 return -ENOMEM;
2939
2940 /*
2941 * This division is why we need the above BUILD_BUG_ON(),
2942 * if that doesn't hold then this will not be right.
2943 */
2944 baid_data->entries_per_queue =
2945 reorder_buf_size / sizeof(baid_data->entries[0]);
2946 }
2947
2948 if (iwl_mvm_has_new_rx_api(mvm) && !start) {
2949 baid = mvm_sta->tid_to_baid[tid];
2950 } else {
2951 /* we don't really need it in this case */
2952 baid = -1;
2953 }
2954
2955 /* Don't send command to remove (start=0) BAID during restart */
2956 if (start || !test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2957 baid = iwl_mvm_fw_baid_op(mvm, sta, start, tid, ssn, buf_size,
2958 baid);
2959
2960 if (baid < 0) {
2961 ret = baid;
2962 goto out_free;
2963 }
2964
2965 if (start) {
2966 mvm->rx_ba_sessions++;
2967
2968 if (!iwl_mvm_has_new_rx_api(mvm))
2969 return 0;
2970
2971 baid_data->baid = baid;
2972 baid_data->timeout = timeout;
2973 baid_data->last_rx = jiffies;
2974 baid_data->rcu_ptr = &mvm->baid_map[baid];
2975 timer_setup(&baid_data->session_timer,
2976 iwl_mvm_rx_agg_session_expired, 0);
2977 baid_data->mvm = mvm;
2978 baid_data->tid = tid;
2979 baid_data->sta_mask = iwl_mvm_sta_fw_id_mask(mvm, sta, -1);
2980 baid_data->buf_size = buf_size;
2981
2982 mvm_sta->tid_to_baid[tid] = baid;
2983 if (timeout)
2984 mod_timer(&baid_data->session_timer,
2985 TU_TO_EXP_TIME(timeout * 2));
2986
2987 iwl_mvm_init_reorder_buffer(mvm, baid_data, ssn);
2988 /*
2989 * protect the BA data with RCU to cover a case where our
2990 * internal RX sync mechanism will timeout (not that it's
2991 * supposed to happen) and we will free the session data while
2992 * RX is being processed in parallel
2993 */
2994 IWL_DEBUG_HT(mvm, "Sta %d(%d) is assigned to BAID %d\n",
2995 mvm_sta->deflink.sta_id, tid, baid);
2996 WARN_ON(rcu_access_pointer(mvm->baid_map[baid]));
2997 rcu_assign_pointer(mvm->baid_map[baid], baid_data);
2998 } else {
2999 baid = mvm_sta->tid_to_baid[tid];
3000
3001 if (mvm->rx_ba_sessions > 0)
3002 /* check that restart flow didn't zero the counter */
3003 mvm->rx_ba_sessions--;
3004 if (!iwl_mvm_has_new_rx_api(mvm))
3005 return 0;
3006
3007 if (WARN_ON(baid == IWL_RX_REORDER_DATA_INVALID_BAID))
3008 return -EINVAL;
3009
3010 baid_data = rcu_access_pointer(mvm->baid_map[baid]);
3011 if (WARN_ON(!baid_data))
3012 return -EINVAL;
3013
3014 /* synchronize all rx queues so we can safely delete */
3015 iwl_mvm_free_reorder(mvm, baid_data);
3016 timer_shutdown_sync(&baid_data->session_timer);
3017 RCU_INIT_POINTER(mvm->baid_map[baid], NULL);
3018 kfree_rcu(baid_data, rcu_head);
3019 IWL_DEBUG_HT(mvm, "BAID %d is free\n", baid);
3020 }
3021 return 0;
3022
3023 out_free:
3024 kfree(baid_data);
3025 return ret;
3026 }
3027
iwl_mvm_sta_tx_agg(struct iwl_mvm * mvm,struct ieee80211_sta * sta,int tid,u8 queue,bool start)3028 int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
3029 int tid, u8 queue, bool start)
3030 {
3031 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3032 struct iwl_mvm_add_sta_cmd cmd = {};
3033 int ret;
3034 u32 status;
3035
3036 lockdep_assert_held(&mvm->mutex);
3037
3038 if (start) {
3039 mvm_sta->tfd_queue_msk |= BIT(queue);
3040 mvm_sta->tid_disable_agg &= ~BIT(tid);
3041 } else {
3042 /* In DQA-mode the queue isn't removed on agg termination */
3043 mvm_sta->tid_disable_agg |= BIT(tid);
3044 }
3045
3046 cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color);
3047 cmd.sta_id = mvm_sta->deflink.sta_id;
3048 cmd.add_modify = STA_MODE_MODIFY;
3049 if (!iwl_mvm_has_new_tx_api(mvm))
3050 cmd.modify_mask = STA_MODIFY_QUEUES;
3051 cmd.modify_mask |= STA_MODIFY_TID_DISABLE_TX;
3052 cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk);
3053 cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg);
3054
3055 status = ADD_STA_SUCCESS;
3056 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA,
3057 iwl_mvm_add_sta_cmd_size(mvm),
3058 &cmd, &status);
3059 if (ret)
3060 return ret;
3061
3062 switch (status & IWL_ADD_STA_STATUS_MASK) {
3063 case ADD_STA_SUCCESS:
3064 break;
3065 default:
3066 ret = -EIO;
3067 IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n",
3068 start ? "start" : "stopp", status);
3069 break;
3070 }
3071
3072 return ret;
3073 }
3074
3075 const u8 tid_to_mac80211_ac[] = {
3076 IEEE80211_AC_BE,
3077 IEEE80211_AC_BK,
3078 IEEE80211_AC_BK,
3079 IEEE80211_AC_BE,
3080 IEEE80211_AC_VI,
3081 IEEE80211_AC_VI,
3082 IEEE80211_AC_VO,
3083 IEEE80211_AC_VO,
3084 IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
3085 };
3086
3087 static const u8 tid_to_ucode_ac[] = {
3088 AC_BE,
3089 AC_BK,
3090 AC_BK,
3091 AC_BE,
3092 AC_VI,
3093 AC_VI,
3094 AC_VO,
3095 AC_VO,
3096 };
3097
iwl_mvm_sta_tx_agg_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid,u16 * ssn)3098 int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3099 struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3100 {
3101 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3102 struct iwl_mvm_tid_data *tid_data;
3103 u16 normalized_ssn;
3104 u16 txq_id;
3105 int ret;
3106
3107 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
3108 return -EINVAL;
3109
3110 if (mvmsta->tid_data[tid].state != IWL_AGG_QUEUED &&
3111 mvmsta->tid_data[tid].state != IWL_AGG_OFF) {
3112 IWL_ERR(mvm,
3113 "Start AGG when state is not IWL_AGG_QUEUED or IWL_AGG_OFF %d!\n",
3114 mvmsta->tid_data[tid].state);
3115 return -ENXIO;
3116 }
3117
3118 lockdep_assert_held(&mvm->mutex);
3119
3120 if (mvmsta->tid_data[tid].txq_id == IWL_MVM_INVALID_QUEUE &&
3121 iwl_mvm_has_new_tx_api(mvm)) {
3122 u8 ac = tid_to_mac80211_ac[tid];
3123
3124 ret = iwl_mvm_sta_alloc_queue_tvqm(mvm, sta, ac, tid);
3125 if (ret)
3126 return ret;
3127 }
3128
3129 spin_lock_bh(&mvmsta->lock);
3130
3131 /*
3132 * Note the possible cases:
3133 * 1. An enabled TXQ - TXQ needs to become agg'ed
3134 * 2. The TXQ hasn't yet been enabled, so find a free one and mark
3135 * it as reserved
3136 */
3137 txq_id = mvmsta->tid_data[tid].txq_id;
3138 if (txq_id == IWL_MVM_INVALID_QUEUE) {
3139 ret = iwl_mvm_find_free_queue(mvm, mvmsta->deflink.sta_id,
3140 IWL_MVM_DQA_MIN_DATA_QUEUE,
3141 IWL_MVM_DQA_MAX_DATA_QUEUE);
3142 if (ret < 0) {
3143 IWL_ERR(mvm, "Failed to allocate agg queue\n");
3144 goto out;
3145 }
3146
3147 txq_id = ret;
3148
3149 /* TXQ hasn't yet been enabled, so mark it only as reserved */
3150 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_RESERVED;
3151 } else if (WARN_ON(txq_id >= IWL_MAX_HW_QUEUES)) {
3152 ret = -ENXIO;
3153 IWL_ERR(mvm, "tid_id %d out of range (0, %d)!\n",
3154 tid, IWL_MAX_HW_QUEUES - 1);
3155 goto out;
3156
3157 } else if (unlikely(mvm->queue_info[txq_id].status ==
3158 IWL_MVM_QUEUE_SHARED)) {
3159 ret = -ENXIO;
3160 IWL_DEBUG_TX_QUEUES(mvm,
3161 "Can't start tid %d agg on shared queue!\n",
3162 tid);
3163 goto out;
3164 }
3165
3166 IWL_DEBUG_TX_QUEUES(mvm,
3167 "AGG for tid %d will be on queue #%d\n",
3168 tid, txq_id);
3169
3170 tid_data = &mvmsta->tid_data[tid];
3171 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3172 tid_data->txq_id = txq_id;
3173 *ssn = tid_data->ssn;
3174
3175 IWL_DEBUG_TX_QUEUES(mvm,
3176 "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n",
3177 mvmsta->deflink.sta_id, tid, txq_id,
3178 tid_data->ssn,
3179 tid_data->next_reclaimed);
3180
3181 /*
3182 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
3183 * to align the wrap around of ssn so we compare relevant values.
3184 */
3185 normalized_ssn = tid_data->ssn;
3186 if (mvm->trans->trans_cfg->gen2)
3187 normalized_ssn &= 0xff;
3188
3189 if (normalized_ssn == tid_data->next_reclaimed) {
3190 tid_data->state = IWL_AGG_STARTING;
3191 ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
3192 } else {
3193 tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3194 ret = IEEE80211_AMPDU_TX_START_DELAY_ADDBA;
3195 }
3196
3197 out:
3198 spin_unlock_bh(&mvmsta->lock);
3199
3200 return ret;
3201 }
3202
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)3203 int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3204 struct ieee80211_sta *sta, u16 tid, u16 buf_size,
3205 bool amsdu)
3206 {
3207 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3208 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3209 unsigned int wdg_timeout =
3210 iwl_mvm_get_wd_timeout(mvm, vif);
3211 int queue, ret;
3212 bool alloc_queue = true;
3213 enum iwl_mvm_queue_status queue_status;
3214 u16 ssn;
3215
3216 struct iwl_trans_txq_scd_cfg cfg = {
3217 .sta_id = mvmsta->deflink.sta_id,
3218 .tid = tid,
3219 .frame_limit = buf_size,
3220 .aggregate = true,
3221 };
3222
3223 /*
3224 * When FW supports TLC_OFFLOAD, it also implements Tx aggregation
3225 * manager, so this function should never be called in this case.
3226 */
3227 if (WARN_ON_ONCE(iwl_mvm_has_tlc_offload(mvm)))
3228 return -EINVAL;
3229
3230 BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE)
3231 != IWL_MAX_TID_COUNT);
3232
3233 spin_lock_bh(&mvmsta->lock);
3234 ssn = tid_data->ssn;
3235 queue = tid_data->txq_id;
3236 tid_data->state = IWL_AGG_ON;
3237 mvmsta->agg_tids |= BIT(tid);
3238 tid_data->ssn = 0xffff;
3239 tid_data->amsdu_in_ampdu_allowed = amsdu;
3240 spin_unlock_bh(&mvmsta->lock);
3241
3242 if (iwl_mvm_has_new_tx_api(mvm)) {
3243 /*
3244 * If there is no queue for this tid, iwl_mvm_sta_tx_agg_start()
3245 * would have failed, so if we are here there is no need to
3246 * allocate a queue.
3247 * However, if aggregation size is different than the default
3248 * size, the scheduler should be reconfigured.
3249 * We cannot do this with the new TX API, so return unsupported
3250 * for now, until it will be offloaded to firmware..
3251 * Note that if SCD default value changes - this condition
3252 * should be updated as well.
3253 */
3254 if (buf_size < IWL_FRAME_LIMIT)
3255 return -EOPNOTSUPP;
3256
3257 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3258 if (ret)
3259 return -EIO;
3260 goto out;
3261 }
3262
3263 cfg.fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
3264
3265 queue_status = mvm->queue_info[queue].status;
3266
3267 /* Maybe there is no need to even alloc a queue... */
3268 if (mvm->queue_info[queue].status == IWL_MVM_QUEUE_READY)
3269 alloc_queue = false;
3270
3271 /*
3272 * Only reconfig the SCD for the queue if the window size has
3273 * changed from current (become smaller)
3274 */
3275 if (!alloc_queue && buf_size < IWL_FRAME_LIMIT) {
3276 /*
3277 * If reconfiguring an existing queue, it first must be
3278 * drained
3279 */
3280 ret = iwl_trans_wait_tx_queues_empty(mvm->trans,
3281 BIT(queue));
3282 if (ret) {
3283 IWL_ERR(mvm,
3284 "Error draining queue before reconfig\n");
3285 return ret;
3286 }
3287
3288 ret = iwl_mvm_reconfig_scd(mvm, queue, cfg.fifo,
3289 mvmsta->deflink.sta_id, tid,
3290 buf_size, ssn);
3291 if (ret) {
3292 IWL_ERR(mvm,
3293 "Error reconfiguring TXQ #%d\n", queue);
3294 return ret;
3295 }
3296 }
3297
3298 if (alloc_queue)
3299 iwl_mvm_enable_txq(mvm, sta, queue, ssn,
3300 &cfg, wdg_timeout);
3301
3302 /* Send ADD_STA command to enable aggs only if the queue isn't shared */
3303 if (queue_status != IWL_MVM_QUEUE_SHARED) {
3304 ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true);
3305 if (ret)
3306 return -EIO;
3307 }
3308
3309 /* No need to mark as reserved */
3310 mvm->queue_info[queue].status = IWL_MVM_QUEUE_READY;
3311
3312 out:
3313 /*
3314 * Even though in theory the peer could have different
3315 * aggregation reorder buffer sizes for different sessions,
3316 * our ucode doesn't allow for that and has a global limit
3317 * for each station. Therefore, use the minimum of all the
3318 * aggregation sessions and our default value.
3319 */
3320 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize =
3321 min(mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize,
3322 buf_size);
3323 mvmsta->deflink.lq_sta.rs_drv.lq.agg_frame_cnt_limit =
3324 mvmsta->deflink.lq_sta.rs_drv.pers.max_agg_bufsize;
3325
3326 IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n",
3327 sta->addr, tid);
3328
3329 return iwl_mvm_send_lq_cmd(mvm, &mvmsta->deflink.lq_sta.rs_drv.lq);
3330 }
3331
iwl_mvm_unreserve_agg_queue(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,struct iwl_mvm_tid_data * tid_data)3332 static void iwl_mvm_unreserve_agg_queue(struct iwl_mvm *mvm,
3333 struct iwl_mvm_sta *mvmsta,
3334 struct iwl_mvm_tid_data *tid_data)
3335 {
3336 u16 txq_id = tid_data->txq_id;
3337
3338 lockdep_assert_held(&mvm->mutex);
3339
3340 if (iwl_mvm_has_new_tx_api(mvm))
3341 return;
3342
3343 /*
3344 * The TXQ is marked as reserved only if no traffic came through yet
3345 * This means no traffic has been sent on this TID (agg'd or not), so
3346 * we no longer have use for the queue. Since it hasn't even been
3347 * allocated through iwl_mvm_enable_txq, so we can just mark it back as
3348 * free.
3349 */
3350 if (mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_RESERVED) {
3351 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_FREE;
3352 tid_data->txq_id = IWL_MVM_INVALID_QUEUE;
3353 }
3354 }
3355
iwl_mvm_sta_tx_agg_stop(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3356 int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3357 struct ieee80211_sta *sta, u16 tid)
3358 {
3359 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3360 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3361 u16 txq_id;
3362 int err;
3363
3364 /*
3365 * If mac80211 is cleaning its state, then say that we finished since
3366 * our state has been cleared anyway.
3367 */
3368 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
3369 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3370 return 0;
3371 }
3372
3373 spin_lock_bh(&mvmsta->lock);
3374
3375 txq_id = tid_data->txq_id;
3376
3377 IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n",
3378 mvmsta->deflink.sta_id, tid, txq_id,
3379 tid_data->state);
3380
3381 mvmsta->agg_tids &= ~BIT(tid);
3382
3383 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3384
3385 switch (tid_data->state) {
3386 case IWL_AGG_ON:
3387 tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
3388
3389 IWL_DEBUG_TX_QUEUES(mvm,
3390 "ssn = %d, next_recl = %d\n",
3391 tid_data->ssn, tid_data->next_reclaimed);
3392
3393 tid_data->ssn = 0xffff;
3394 tid_data->state = IWL_AGG_OFF;
3395 spin_unlock_bh(&mvmsta->lock);
3396
3397 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3398
3399 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3400 return 0;
3401 case IWL_AGG_STARTING:
3402 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3403 /*
3404 * The agg session has been stopped before it was set up. This
3405 * can happen when the AddBA timer times out for example.
3406 */
3407
3408 /* No barriers since we are under mutex */
3409 lockdep_assert_held(&mvm->mutex);
3410
3411 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
3412 tid_data->state = IWL_AGG_OFF;
3413 err = 0;
3414 break;
3415 default:
3416 IWL_ERR(mvm,
3417 "Stopping AGG while state not ON or starting for %d on %d (%d)\n",
3418 mvmsta->deflink.sta_id, tid, tid_data->state);
3419 IWL_ERR(mvm,
3420 "\ttid_data->txq_id = %d\n", tid_data->txq_id);
3421 err = -EINVAL;
3422 }
3423
3424 spin_unlock_bh(&mvmsta->lock);
3425
3426 return err;
3427 }
3428
iwl_mvm_sta_tx_agg_flush(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,u16 tid)3429 int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3430 struct ieee80211_sta *sta, u16 tid)
3431 {
3432 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3433 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
3434 u16 txq_id;
3435 enum iwl_mvm_agg_state old_state;
3436
3437 /*
3438 * First set the agg state to OFF to avoid calling
3439 * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty.
3440 */
3441 spin_lock_bh(&mvmsta->lock);
3442 txq_id = tid_data->txq_id;
3443 IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n",
3444 mvmsta->deflink.sta_id, tid, txq_id,
3445 tid_data->state);
3446 old_state = tid_data->state;
3447 tid_data->state = IWL_AGG_OFF;
3448 mvmsta->agg_tids &= ~BIT(tid);
3449 spin_unlock_bh(&mvmsta->lock);
3450
3451 iwl_mvm_unreserve_agg_queue(mvm, mvmsta, tid_data);
3452
3453 if (old_state >= IWL_AGG_ON) {
3454 iwl_mvm_drain_sta(mvm, mvmsta, true);
3455
3456 if (iwl_mvm_has_new_tx_api(mvm)) {
3457 if (iwl_mvm_flush_sta_tids(mvm, mvmsta->deflink.sta_id,
3458 BIT(tid)))
3459 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3460 iwl_trans_wait_txq_empty(mvm->trans, txq_id);
3461 } else {
3462 if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id)))
3463 IWL_ERR(mvm, "Couldn't flush the AGG queue\n");
3464 iwl_trans_wait_tx_queues_empty(mvm->trans, BIT(txq_id));
3465 }
3466
3467 iwl_mvm_drain_sta(mvm, mvmsta, false);
3468
3469 iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false);
3470 }
3471
3472 return 0;
3473 }
3474
iwl_mvm_set_fw_key_idx(struct iwl_mvm * mvm)3475 static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm)
3476 {
3477 int i, max = -1, max_offs = -1;
3478
3479 lockdep_assert_held(&mvm->mutex);
3480
3481 /* Pick the unused key offset with the highest 'deleted'
3482 * counter. Every time a key is deleted, all the counters
3483 * are incremented and the one that was just deleted is
3484 * reset to zero. Thus, the highest counter is the one
3485 * that was deleted longest ago. Pick that one.
3486 */
3487 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3488 if (test_bit(i, mvm->fw_key_table))
3489 continue;
3490 if (mvm->fw_key_deleted[i] > max) {
3491 max = mvm->fw_key_deleted[i];
3492 max_offs = i;
3493 }
3494 }
3495
3496 if (max_offs < 0)
3497 return STA_KEY_IDX_INVALID;
3498
3499 return max_offs;
3500 }
3501
iwl_mvm_get_key_sta(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3502 static struct iwl_mvm_sta *iwl_mvm_get_key_sta(struct iwl_mvm *mvm,
3503 struct ieee80211_vif *vif,
3504 struct ieee80211_sta *sta)
3505 {
3506 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3507
3508 if (sta)
3509 return iwl_mvm_sta_from_mac80211(sta);
3510
3511 /*
3512 * The device expects GTKs for station interfaces to be
3513 * installed as GTKs for the AP station. If we have no
3514 * station ID, then use AP's station ID.
3515 */
3516 if (vif->type == NL80211_IFTYPE_STATION &&
3517 mvmvif->deflink.ap_sta_id != IWL_INVALID_STA) {
3518 u8 sta_id = mvmvif->deflink.ap_sta_id;
3519
3520 sta = rcu_dereference_check(mvm->fw_id_to_mac_id[sta_id],
3521 lockdep_is_held(&mvm->mutex));
3522
3523 /*
3524 * It is possible that the 'sta' parameter is NULL,
3525 * for example when a GTK is removed - the sta_id will then
3526 * be the AP ID, and no station was passed by mac80211.
3527 */
3528 if (IS_ERR_OR_NULL(sta))
3529 return NULL;
3530
3531 return iwl_mvm_sta_from_mac80211(sta);
3532 }
3533
3534 return NULL;
3535 }
3536
iwl_mvm_pn_cmp(const u8 * pn1,const u8 * pn2,int len)3537 static int iwl_mvm_pn_cmp(const u8 *pn1, const u8 *pn2, int len)
3538 {
3539 int i;
3540
3541 for (i = len - 1; i >= 0; i--) {
3542 if (pn1[i] > pn2[i])
3543 return 1;
3544 if (pn1[i] < pn2[i])
3545 return -1;
3546 }
3547
3548 return 0;
3549 }
3550
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)3551 static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm,
3552 u32 sta_id,
3553 struct ieee80211_key_conf *key, bool mcast,
3554 u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags,
3555 u8 key_offset, bool mfp)
3556 {
3557 union {
3558 struct iwl_mvm_add_sta_key_cmd_v1 cmd_v1;
3559 struct iwl_mvm_add_sta_key_cmd cmd;
3560 } u = {};
3561 __le16 key_flags;
3562 int ret;
3563 u32 status;
3564 u16 keyidx;
3565 u64 pn = 0;
3566 int i, size;
3567 bool new_api = fw_has_api(&mvm->fw->ucode_capa,
3568 IWL_UCODE_TLV_API_TKIP_MIC_KEYS);
3569 int api_ver = iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA_KEY,
3570 new_api ? 2 : 1);
3571
3572 if (sta_id == IWL_INVALID_STA)
3573 return -EINVAL;
3574
3575 keyidx = (key->keyidx << STA_KEY_FLG_KEYID_POS) &
3576 STA_KEY_FLG_KEYID_MSK;
3577 key_flags = cpu_to_le16(keyidx);
3578 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP);
3579
3580 if (key->flags & IEEE80211_KEY_FLAG_SPP_AMSDU)
3581 key_flags |= cpu_to_le16(STA_KEY_FLG_AMSDU_SPP);
3582
3583 switch (key->cipher) {
3584 case WLAN_CIPHER_SUITE_TKIP:
3585 key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP);
3586 if (api_ver >= 2) {
3587 memcpy((void *)&u.cmd.tx_mic_key,
3588 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
3589 IWL_MIC_KEY_SIZE);
3590
3591 memcpy((void *)&u.cmd.rx_mic_key,
3592 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
3593 IWL_MIC_KEY_SIZE);
3594 pn = atomic64_read(&key->tx_pn);
3595
3596 } else {
3597 u.cmd_v1.tkip_rx_tsc_byte2 = tkip_iv32;
3598 for (i = 0; i < 5; i++)
3599 u.cmd_v1.tkip_rx_ttak[i] =
3600 cpu_to_le16(tkip_p1k[i]);
3601 }
3602 memcpy(u.cmd.common.key, key->key, key->keylen);
3603 break;
3604 case WLAN_CIPHER_SUITE_CCMP:
3605 key_flags |= cpu_to_le16(STA_KEY_FLG_CCM);
3606 memcpy(u.cmd.common.key, key->key, key->keylen);
3607 if (api_ver >= 2)
3608 pn = atomic64_read(&key->tx_pn);
3609 break;
3610 case WLAN_CIPHER_SUITE_WEP104:
3611 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES);
3612 fallthrough;
3613 case WLAN_CIPHER_SUITE_WEP40:
3614 key_flags |= cpu_to_le16(STA_KEY_FLG_WEP);
3615 memcpy(u.cmd.common.key + 3, key->key, key->keylen);
3616 break;
3617 case WLAN_CIPHER_SUITE_GCMP_256:
3618 key_flags |= cpu_to_le16(STA_KEY_FLG_KEY_32BYTES);
3619 fallthrough;
3620 case WLAN_CIPHER_SUITE_GCMP:
3621 key_flags |= cpu_to_le16(STA_KEY_FLG_GCMP);
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 default:
3627 key_flags |= cpu_to_le16(STA_KEY_FLG_EXT);
3628 memcpy(u.cmd.common.key, key->key, key->keylen);
3629 }
3630
3631 if (mcast)
3632 key_flags |= cpu_to_le16(STA_KEY_MULTICAST);
3633 if (mfp)
3634 key_flags |= cpu_to_le16(STA_KEY_MFP);
3635
3636 u.cmd.common.key_offset = key_offset;
3637 u.cmd.common.key_flags = key_flags;
3638 u.cmd.common.sta_id = sta_id;
3639
3640 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
3641 i = 0;
3642 else
3643 i = -1;
3644
3645 for (; i < IEEE80211_NUM_TIDS; i++) {
3646 struct ieee80211_key_seq seq = {};
3647 u8 _rx_pn[IEEE80211_MAX_PN_LEN] = {}, *rx_pn = _rx_pn;
3648 int rx_pn_len = 8;
3649 /* there's a hole at 2/3 in FW format depending on version */
3650 int hole = api_ver >= 3 ? 0 : 2;
3651
3652 ieee80211_get_key_rx_seq(key, i, &seq);
3653
3654 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
3655 rx_pn[0] = seq.tkip.iv16;
3656 rx_pn[1] = seq.tkip.iv16 >> 8;
3657 rx_pn[2 + hole] = seq.tkip.iv32;
3658 rx_pn[3 + hole] = seq.tkip.iv32 >> 8;
3659 rx_pn[4 + hole] = seq.tkip.iv32 >> 16;
3660 rx_pn[5 + hole] = seq.tkip.iv32 >> 24;
3661 } else if (key_flags & cpu_to_le16(STA_KEY_FLG_EXT)) {
3662 rx_pn = seq.hw.seq;
3663 rx_pn_len = seq.hw.seq_len;
3664 } else {
3665 rx_pn[0] = seq.ccmp.pn[0];
3666 rx_pn[1] = seq.ccmp.pn[1];
3667 rx_pn[2 + hole] = seq.ccmp.pn[2];
3668 rx_pn[3 + hole] = seq.ccmp.pn[3];
3669 rx_pn[4 + hole] = seq.ccmp.pn[4];
3670 rx_pn[5 + hole] = seq.ccmp.pn[5];
3671 }
3672
3673 if (iwl_mvm_pn_cmp(rx_pn, (u8 *)&u.cmd.common.rx_secur_seq_cnt,
3674 rx_pn_len) > 0)
3675 memcpy(&u.cmd.common.rx_secur_seq_cnt, rx_pn,
3676 rx_pn_len);
3677 }
3678
3679 if (api_ver >= 2) {
3680 u.cmd.transmit_seq_cnt = cpu_to_le64(pn);
3681 size = sizeof(u.cmd);
3682 } else {
3683 size = sizeof(u.cmd_v1);
3684 }
3685
3686 status = ADD_STA_SUCCESS;
3687 if (cmd_flags & CMD_ASYNC)
3688 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, size,
3689 &u.cmd);
3690 else
3691 ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, size,
3692 &u.cmd, &status);
3693
3694 switch (status) {
3695 case ADD_STA_SUCCESS:
3696 IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n");
3697 break;
3698 default:
3699 ret = -EIO;
3700 IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n");
3701 break;
3702 }
3703
3704 return ret;
3705 }
3706
iwl_mvm_send_sta_igtk(struct iwl_mvm * mvm,struct ieee80211_key_conf * keyconf,u8 sta_id,bool remove_key)3707 static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm,
3708 struct ieee80211_key_conf *keyconf,
3709 u8 sta_id, bool remove_key)
3710 {
3711 struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {};
3712
3713 /* verify the key details match the required command's expectations */
3714 if (WARN_ON((keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) ||
3715 (keyconf->keyidx != 4 && keyconf->keyidx != 5 &&
3716 keyconf->keyidx != 6 && keyconf->keyidx != 7) ||
3717 (keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC &&
3718 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_128 &&
3719 keyconf->cipher != WLAN_CIPHER_SUITE_BIP_GMAC_256)))
3720 return -EINVAL;
3721
3722 if (WARN_ON(!iwl_mvm_has_new_rx_api(mvm) &&
3723 keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC))
3724 return -EINVAL;
3725
3726 igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx);
3727 igtk_cmd.sta_id = cpu_to_le32(sta_id);
3728
3729 if (remove_key) {
3730 /* This is a valid situation for IGTK */
3731 if (sta_id == IWL_INVALID_STA)
3732 return 0;
3733
3734 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
3735 } else {
3736 struct ieee80211_key_seq seq;
3737 const u8 *pn;
3738
3739 switch (keyconf->cipher) {
3740 case WLAN_CIPHER_SUITE_AES_CMAC:
3741 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_CCM);
3742 break;
3743 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3744 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3745 igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_FLG_GCMP);
3746 break;
3747 default:
3748 return -EINVAL;
3749 }
3750
3751 memcpy(igtk_cmd.igtk, keyconf->key, keyconf->keylen);
3752 if (keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3753 igtk_cmd.ctrl_flags |=
3754 cpu_to_le32(STA_KEY_FLG_KEY_32BYTES);
3755 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3756 pn = seq.aes_cmac.pn;
3757 igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) |
3758 ((u64) pn[4] << 8) |
3759 ((u64) pn[3] << 16) |
3760 ((u64) pn[2] << 24) |
3761 ((u64) pn[1] << 32) |
3762 ((u64) pn[0] << 40));
3763 }
3764
3765 IWL_DEBUG_INFO(mvm, "%s %sIGTK (%d) for sta %u\n",
3766 remove_key ? "removing" : "installing",
3767 keyconf->keyidx >= 6 ? "B" : "",
3768 keyconf->keyidx, igtk_cmd.sta_id);
3769
3770 if (!iwl_mvm_has_new_rx_api(mvm)) {
3771 struct iwl_mvm_mgmt_mcast_key_cmd_v1 igtk_cmd_v1 = {
3772 .ctrl_flags = igtk_cmd.ctrl_flags,
3773 .key_id = igtk_cmd.key_id,
3774 .sta_id = igtk_cmd.sta_id,
3775 .receive_seq_cnt = igtk_cmd.receive_seq_cnt
3776 };
3777
3778 memcpy(igtk_cmd_v1.igtk, igtk_cmd.igtk,
3779 ARRAY_SIZE(igtk_cmd_v1.igtk));
3780 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3781 sizeof(igtk_cmd_v1), &igtk_cmd_v1);
3782 }
3783 return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0,
3784 sizeof(igtk_cmd), &igtk_cmd);
3785 }
3786
3787
iwl_mvm_get_mac_addr(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta)3788 static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm,
3789 struct ieee80211_vif *vif,
3790 struct ieee80211_sta *sta)
3791 {
3792 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3793
3794 if (sta)
3795 return sta->addr;
3796
3797 if (vif->type == NL80211_IFTYPE_STATION &&
3798 mvmvif->deflink.ap_sta_id != IWL_INVALID_STA) {
3799 u8 sta_id = mvmvif->deflink.ap_sta_id;
3800 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
3801 lockdep_is_held(&mvm->mutex));
3802 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta)))
3803 return NULL;
3804
3805 return sta->addr;
3806 }
3807
3808
3809 return NULL;
3810 }
3811
__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)3812 static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3813 struct ieee80211_vif *vif,
3814 struct ieee80211_sta *sta,
3815 struct ieee80211_key_conf *keyconf,
3816 u8 key_offset,
3817 bool mcast)
3818 {
3819 const u8 *addr;
3820 struct ieee80211_key_seq seq;
3821 u16 p1k[5];
3822 u32 sta_id;
3823 bool mfp = false;
3824
3825 if (sta) {
3826 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3827
3828 sta_id = mvm_sta->deflink.sta_id;
3829 mfp = sta->mfp;
3830 } else if (vif->type == NL80211_IFTYPE_AP &&
3831 !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
3832 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3833
3834 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3835 } else {
3836 IWL_ERR(mvm, "Failed to find station id\n");
3837 return -EINVAL;
3838 }
3839
3840 if (keyconf->cipher == WLAN_CIPHER_SUITE_TKIP) {
3841 addr = iwl_mvm_get_mac_addr(mvm, vif, sta);
3842 if (!addr) {
3843 IWL_ERR(mvm, "Failed to find mac address\n");
3844 return -EINVAL;
3845 }
3846
3847 /* get phase 1 key from mac80211 */
3848 ieee80211_get_key_rx_seq(keyconf, 0, &seq);
3849 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
3850
3851 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3852 seq.tkip.iv32, p1k, 0, key_offset,
3853 mfp);
3854 }
3855
3856 return iwl_mvm_send_sta_key(mvm, sta_id, keyconf, mcast,
3857 0, NULL, 0, key_offset, mfp);
3858 }
3859
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)3860 int iwl_mvm_set_sta_key(struct iwl_mvm *mvm,
3861 struct ieee80211_vif *vif,
3862 struct ieee80211_sta *sta,
3863 struct ieee80211_key_conf *keyconf,
3864 u8 key_offset)
3865 {
3866 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3867 struct iwl_mvm_sta *mvm_sta;
3868 u8 sta_id = IWL_INVALID_STA;
3869 int ret;
3870 static const u8 __maybe_unused zero_addr[ETH_ALEN] = {0};
3871
3872 lockdep_assert_held(&mvm->mutex);
3873
3874 if (vif->type != NL80211_IFTYPE_AP ||
3875 keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
3876 /* Get the station id from the mvm local station table */
3877 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3878 if (!mvm_sta) {
3879 IWL_ERR(mvm, "Failed to find station\n");
3880 return -EINVAL;
3881 }
3882 sta_id = mvm_sta->deflink.sta_id;
3883
3884 /*
3885 * It is possible that the 'sta' parameter is NULL, and thus
3886 * there is a need to retrieve the sta from the local station
3887 * table.
3888 */
3889 if (!sta) {
3890 sta = rcu_dereference_protected(
3891 mvm->fw_id_to_mac_id[sta_id],
3892 lockdep_is_held(&mvm->mutex));
3893 if (IS_ERR_OR_NULL(sta)) {
3894 IWL_ERR(mvm, "Invalid station id\n");
3895 return -EINVAL;
3896 }
3897 }
3898
3899 if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
3900 return -EINVAL;
3901 } else {
3902 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3903
3904 sta_id = mvmvif->deflink.mcast_sta.sta_id;
3905 }
3906
3907 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3908 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3909 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
3910 ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
3911 goto end;
3912 }
3913
3914 /* If the key_offset is not pre-assigned, we need to find a
3915 * new offset to use. In normal cases, the offset is not
3916 * pre-assigned, but during HW_RESTART we want to reuse the
3917 * same indices, so we pass them when this function is called.
3918 *
3919 * In D3 entry, we need to hardcoded the indices (because the
3920 * firmware hardcodes the PTK offset to 0). In this case, we
3921 * need to make sure we don't overwrite the hw_key_idx in the
3922 * keyconf structure, because otherwise we cannot configure
3923 * the original ones back when resuming.
3924 */
3925 if (key_offset == STA_KEY_IDX_INVALID) {
3926 key_offset = iwl_mvm_set_fw_key_idx(mvm);
3927 if (key_offset == STA_KEY_IDX_INVALID)
3928 return -ENOSPC;
3929 keyconf->hw_key_idx = key_offset;
3930 }
3931
3932 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, key_offset, mcast);
3933 if (ret)
3934 goto end;
3935
3936 /*
3937 * For WEP, the same key is used for multicast and unicast. Upload it
3938 * again, using the same key offset, and now pointing the other one
3939 * to the same key slot (offset).
3940 * If this fails, remove the original as well.
3941 */
3942 if ((keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
3943 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) &&
3944 sta) {
3945 ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf,
3946 key_offset, !mcast);
3947 if (ret) {
3948 __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
3949 goto end;
3950 }
3951 }
3952
3953 __set_bit(key_offset, mvm->fw_key_table);
3954
3955 end:
3956 IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
3957 keyconf->cipher, keyconf->keylen, keyconf->keyidx,
3958 sta ? sta->addr : zero_addr, ret);
3959 return ret;
3960 }
3961
iwl_mvm_remove_sta_key(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * keyconf)3962 int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
3963 struct ieee80211_vif *vif,
3964 struct ieee80211_sta *sta,
3965 struct ieee80211_key_conf *keyconf)
3966 {
3967 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
3968 struct iwl_mvm_sta *mvm_sta;
3969 u8 sta_id = IWL_INVALID_STA;
3970 int ret, i;
3971
3972 lockdep_assert_held(&mvm->mutex);
3973
3974 /* Get the station from the mvm local station table */
3975 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
3976 if (mvm_sta)
3977 sta_id = mvm_sta->deflink.sta_id;
3978 else if (!sta && vif->type == NL80211_IFTYPE_AP && mcast)
3979 sta_id = iwl_mvm_vif_from_mac80211(vif)->deflink.mcast_sta.sta_id;
3980
3981
3982 IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
3983 keyconf->keyidx, sta_id);
3984
3985 if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
3986 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
3987 keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
3988 return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
3989
3990 if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
3991 IWL_ERR(mvm, "offset %d not used in fw key table.\n",
3992 keyconf->hw_key_idx);
3993 return -ENOENT;
3994 }
3995
3996 /* track which key was deleted last */
3997 for (i = 0; i < STA_KEY_MAX_NUM; i++) {
3998 if (mvm->fw_key_deleted[i] < U8_MAX)
3999 mvm->fw_key_deleted[i]++;
4000 }
4001 mvm->fw_key_deleted[keyconf->hw_key_idx] = 0;
4002
4003 if (sta && !mvm_sta) {
4004 IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n");
4005 return 0;
4006 }
4007
4008 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast);
4009 if (ret)
4010 return ret;
4011
4012 /* delete WEP key twice to get rid of (now useless) offset */
4013 if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4014 keyconf->cipher == WLAN_CIPHER_SUITE_WEP104)
4015 ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast);
4016
4017 return ret;
4018 }
4019
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)4020 void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm,
4021 struct ieee80211_vif *vif,
4022 struct ieee80211_key_conf *keyconf,
4023 struct ieee80211_sta *sta, u32 iv32,
4024 u16 *phase1key)
4025 {
4026 struct iwl_mvm_sta *mvm_sta;
4027 bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE);
4028 bool mfp = sta ? sta->mfp : false;
4029
4030 rcu_read_lock();
4031
4032 mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
4033 if (WARN_ON_ONCE(!mvm_sta))
4034 goto unlock;
4035 iwl_mvm_send_sta_key(mvm, mvm_sta->deflink.sta_id, keyconf, mcast,
4036 iv32, phase1key, CMD_ASYNC, keyconf->hw_key_idx,
4037 mfp);
4038
4039 unlock:
4040 rcu_read_unlock();
4041 }
4042
iwl_mvm_sta_modify_ps_wake(struct iwl_mvm * mvm,struct ieee80211_sta * sta)4043 void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm,
4044 struct ieee80211_sta *sta)
4045 {
4046 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4047 struct iwl_mvm_add_sta_cmd cmd = {
4048 .add_modify = STA_MODE_MODIFY,
4049 .sta_id = mvmsta->deflink.sta_id,
4050 .station_flags_msk = cpu_to_le32(STA_FLG_PS),
4051 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4052 };
4053 int ret;
4054
4055 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4056 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4057 if (ret)
4058 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4059 }
4060
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)4061 void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm,
4062 struct ieee80211_sta *sta,
4063 enum ieee80211_frame_release_type reason,
4064 u16 cnt, u16 tids, bool more_data,
4065 bool single_sta_queue)
4066 {
4067 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
4068 struct iwl_mvm_add_sta_cmd cmd = {
4069 .add_modify = STA_MODE_MODIFY,
4070 .sta_id = mvmsta->deflink.sta_id,
4071 .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT,
4072 .sleep_tx_count = cpu_to_le16(cnt),
4073 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4074 };
4075 int tid, ret;
4076 unsigned long _tids = tids;
4077
4078 /* convert TIDs to ACs - we don't support TSPEC so that's OK
4079 * Note that this field is reserved and unused by firmware not
4080 * supporting GO uAPSD, so it's safe to always do this.
4081 */
4082 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT)
4083 cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]);
4084
4085 /* If we're releasing frames from aggregation or dqa queues then check
4086 * if all the queues that we're releasing frames from, combined, have:
4087 * - more frames than the service period, in which case more_data
4088 * needs to be set
4089 * - fewer than 'cnt' frames, in which case we need to adjust the
4090 * firmware command (but do that unconditionally)
4091 */
4092 if (single_sta_queue) {
4093 int remaining = cnt;
4094 int sleep_tx_count;
4095
4096 spin_lock_bh(&mvmsta->lock);
4097 for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) {
4098 struct iwl_mvm_tid_data *tid_data;
4099 u16 n_queued;
4100
4101 tid_data = &mvmsta->tid_data[tid];
4102
4103 n_queued = iwl_mvm_tid_queued(mvm, tid_data);
4104 if (n_queued > remaining) {
4105 more_data = true;
4106 remaining = 0;
4107 break;
4108 }
4109 remaining -= n_queued;
4110 }
4111 sleep_tx_count = cnt - remaining;
4112 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
4113 mvmsta->sleep_tx_count = sleep_tx_count;
4114 spin_unlock_bh(&mvmsta->lock);
4115
4116 cmd.sleep_tx_count = cpu_to_le16(sleep_tx_count);
4117 if (WARN_ON(cnt - remaining == 0)) {
4118 ieee80211_sta_eosp(sta);
4119 return;
4120 }
4121 }
4122
4123 /* Note: this is ignored by firmware not supporting GO uAPSD */
4124 if (more_data)
4125 cmd.sleep_state_flags |= STA_SLEEP_STATE_MOREDATA;
4126
4127 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) {
4128 mvmsta->next_status_eosp = true;
4129 cmd.sleep_state_flags |= STA_SLEEP_STATE_PS_POLL;
4130 } else {
4131 cmd.sleep_state_flags |= STA_SLEEP_STATE_UAPSD;
4132 }
4133
4134 /* block the Tx queues until the FW updated the sleep Tx count */
4135 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA,
4136 CMD_ASYNC | CMD_BLOCK_TXQS,
4137 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4138 if (ret)
4139 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4140 }
4141
iwl_mvm_rx_eosp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)4142 void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm,
4143 struct iwl_rx_cmd_buffer *rxb)
4144 {
4145 struct iwl_rx_packet *pkt = rxb_addr(rxb);
4146 struct iwl_mvm_eosp_notification *notif = (void *)pkt->data;
4147 struct ieee80211_sta *sta;
4148 u32 sta_id = le32_to_cpu(notif->sta_id);
4149
4150 if (WARN_ON_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations))
4151 return;
4152
4153 rcu_read_lock();
4154 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
4155 if (!IS_ERR_OR_NULL(sta))
4156 ieee80211_sta_eosp(sta);
4157 rcu_read_unlock();
4158 }
4159
iwl_mvm_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_sta * mvmsta,bool disable)4160 void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm,
4161 struct iwl_mvm_sta *mvmsta,
4162 bool disable)
4163 {
4164 struct iwl_mvm_add_sta_cmd cmd = {
4165 .add_modify = STA_MODE_MODIFY,
4166 .sta_id = mvmsta->deflink.sta_id,
4167 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4168 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4169 .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color),
4170 };
4171 int ret;
4172
4173 if (mvm->mld_api_is_used) {
4174 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4175 iwl_mvm_mld_sta_modify_disable_tx(mvm, mvmsta, disable);
4176 return;
4177 }
4178
4179 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4180 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4181 if (ret)
4182 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4183 }
4184
iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm * mvm,struct ieee80211_sta * sta,bool disable)4185 void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm,
4186 struct ieee80211_sta *sta,
4187 bool disable)
4188 {
4189 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4190
4191 if (mvm->mld_api_is_used) {
4192 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4193 iwl_mvm_mld_sta_modify_disable_tx_ap(mvm, sta, disable);
4194 return;
4195 }
4196
4197 spin_lock_bh(&mvm_sta->lock);
4198
4199 if (mvm_sta->disable_tx == disable) {
4200 spin_unlock_bh(&mvm_sta->lock);
4201 return;
4202 }
4203
4204 mvm_sta->disable_tx = disable;
4205
4206 /*
4207 * If sta PS state is handled by mac80211, tell it to start/stop
4208 * queuing tx for this station.
4209 */
4210 if (!ieee80211_hw_check(mvm->hw, AP_LINK_PS))
4211 ieee80211_sta_block_awake(mvm->hw, sta, disable);
4212
4213 iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable);
4214
4215 spin_unlock_bh(&mvm_sta->lock);
4216 }
4217
iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,struct iwl_mvm_int_sta * sta,bool disable)4218 static void iwl_mvm_int_sta_modify_disable_tx(struct iwl_mvm *mvm,
4219 struct iwl_mvm_vif *mvmvif,
4220 struct iwl_mvm_int_sta *sta,
4221 bool disable)
4222 {
4223 u32 id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
4224 struct iwl_mvm_add_sta_cmd cmd = {
4225 .add_modify = STA_MODE_MODIFY,
4226 .sta_id = sta->sta_id,
4227 .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0,
4228 .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX),
4229 .mac_id_n_color = cpu_to_le32(id),
4230 };
4231 int ret;
4232
4233 ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC,
4234 iwl_mvm_add_sta_cmd_size(mvm), &cmd);
4235 if (ret)
4236 IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret);
4237 }
4238
iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm * mvm,struct iwl_mvm_vif * mvmvif,bool disable)4239 void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm,
4240 struct iwl_mvm_vif *mvmvif,
4241 bool disable)
4242 {
4243 struct ieee80211_sta *sta;
4244 struct iwl_mvm_sta *mvm_sta;
4245 int i;
4246
4247 if (mvm->mld_api_is_used) {
4248 if (!iwl_mvm_has_no_host_disable_tx(mvm))
4249 iwl_mvm_mld_modify_all_sta_disable_tx(mvm, mvmvif,
4250 disable);
4251 return;
4252 }
4253
4254 rcu_read_lock();
4255
4256 /* Block/unblock all the stations of the given mvmvif */
4257 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
4258 sta = rcu_dereference(mvm->fw_id_to_mac_id[i]);
4259 if (IS_ERR_OR_NULL(sta))
4260 continue;
4261
4262 mvm_sta = iwl_mvm_sta_from_mac80211(sta);
4263 if (mvm_sta->mac_id_n_color !=
4264 FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color))
4265 continue;
4266
4267 iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable);
4268 }
4269
4270 rcu_read_unlock();
4271
4272 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE))
4273 return;
4274
4275 /* Need to block/unblock also multicast station */
4276 if (mvmvif->deflink.mcast_sta.sta_id != IWL_INVALID_STA)
4277 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4278 &mvmvif->deflink.mcast_sta,
4279 disable);
4280
4281 /*
4282 * Only unblock the broadcast station (FW blocks it for immediate
4283 * quiet, not the driver)
4284 */
4285 if (!disable && mvmvif->deflink.bcast_sta.sta_id != IWL_INVALID_STA)
4286 iwl_mvm_int_sta_modify_disable_tx(mvm, mvmvif,
4287 &mvmvif->deflink.bcast_sta,
4288 disable);
4289 }
4290
iwl_mvm_csa_client_absent(struct iwl_mvm * mvm,struct ieee80211_vif * vif)4291 void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
4292 {
4293 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4294 struct iwl_mvm_sta *mvmsta;
4295
4296 rcu_read_lock();
4297
4298 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->deflink.ap_sta_id);
4299
4300 if (mvmsta)
4301 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);
4302
4303 rcu_read_unlock();
4304 }
4305
iwl_mvm_tid_queued(struct iwl_mvm * mvm,struct iwl_mvm_tid_data * tid_data)4306 u16 iwl_mvm_tid_queued(struct iwl_mvm *mvm, struct iwl_mvm_tid_data *tid_data)
4307 {
4308 u16 sn = IEEE80211_SEQ_TO_SN(tid_data->seq_number);
4309
4310 /*
4311 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
4312 * to align the wrap around of ssn so we compare relevant values.
4313 */
4314 if (mvm->trans->trans_cfg->gen2)
4315 sn &= 0xff;
4316
4317 return ieee80211_sn_sub(sn, tid_data->next_reclaimed);
4318 }
4319
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)4320 int iwl_mvm_add_pasn_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
4321 struct iwl_mvm_int_sta *sta, u8 *addr, u32 cipher,
4322 u8 *key, u32 key_len,
4323 struct ieee80211_key_conf *keyconf)
4324 {
4325 int ret;
4326 u16 queue;
4327 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
4328 unsigned int wdg_timeout =
4329 iwl_mvm_get_wd_timeout(mvm, vif);
4330 bool mld = iwl_mvm_has_mld_api(mvm->fw);
4331 u32 type = IWL_STA_LINK;
4332
4333 if (mld)
4334 type = STATION_TYPE_PEER;
4335
4336 ret = iwl_mvm_allocate_int_sta(mvm, sta, 0,
4337 NL80211_IFTYPE_UNSPECIFIED, type);
4338 if (ret)
4339 return ret;
4340
4341 if (mld)
4342 ret = iwl_mvm_mld_add_int_sta_with_queue(mvm, sta, addr,
4343 mvmvif->deflink.fw_link_id,
4344 &queue,
4345 IWL_MAX_TID_COUNT,
4346 &wdg_timeout);
4347 else
4348 ret = iwl_mvm_add_int_sta_with_queue(mvm, mvmvif->id,
4349 mvmvif->color, addr, sta,
4350 &queue,
4351 IWL_MVM_TX_FIFO_BE);
4352 if (ret)
4353 goto out;
4354
4355 keyconf->cipher = cipher;
4356 memcpy(keyconf->key, key, key_len);
4357 keyconf->keylen = key_len;
4358 keyconf->flags = IEEE80211_KEY_FLAG_PAIRWISE;
4359
4360 if (mld) {
4361 /* The MFP flag is set according to the station mfp field. Since
4362 * we don't have a station, set it manually.
4363 */
4364 u32 key_flags =
4365 iwl_mvm_get_sec_flags(mvm, vif, NULL, keyconf) |
4366 IWL_SEC_KEY_FLAG_MFP;
4367 u32 sta_mask = BIT(sta->sta_id);
4368
4369 ret = iwl_mvm_mld_send_key(mvm, sta_mask, key_flags, keyconf);
4370 } else {
4371 ret = iwl_mvm_send_sta_key(mvm, sta->sta_id, keyconf, false,
4372 0, NULL, 0, 0, true);
4373 }
4374
4375 out:
4376 if (ret)
4377 iwl_mvm_dealloc_int_sta(mvm, sta);
4378 return ret;
4379 }
4380
iwl_mvm_cancel_channel_switch(struct iwl_mvm * mvm,struct ieee80211_vif * vif,u32 id)4381 void iwl_mvm_cancel_channel_switch(struct iwl_mvm *mvm,
4382 struct ieee80211_vif *vif,
4383 u32 id)
4384 {
4385 struct iwl_cancel_channel_switch_cmd cancel_channel_switch_cmd = {
4386 .id = cpu_to_le32(id),
4387 };
4388 int ret;
4389
4390 ret = iwl_mvm_send_cmd_pdu(mvm,
4391 WIDE_ID(MAC_CONF_GROUP, CANCEL_CHANNEL_SWITCH_CMD),
4392 CMD_ASYNC,
4393 sizeof(cancel_channel_switch_cmd),
4394 &cancel_channel_switch_cmd);
4395 if (ret)
4396 IWL_ERR(mvm, "Failed to cancel the channel switch\n");
4397 }
4398
iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif * mvmvif,u8 fw_sta_id)4399 static int iwl_mvm_fw_sta_id_to_fw_link_id(struct iwl_mvm_vif *mvmvif,
4400 u8 fw_sta_id)
4401 {
4402 struct ieee80211_link_sta *link_sta =
4403 rcu_dereference(mvmvif->mvm->fw_id_to_link_sta[fw_sta_id]);
4404 struct iwl_mvm_vif_link_info *link;
4405
4406 if (WARN_ON_ONCE(!link_sta))
4407 return -EINVAL;
4408
4409 link = mvmvif->link[link_sta->link_id];
4410
4411 if (WARN_ON_ONCE(!link))
4412 return -EINVAL;
4413
4414 return link->fw_link_id;
4415 }
4416
4417 #define IWL_MVM_TPT_COUNT_WINDOW (IWL_MVM_TPT_COUNT_WINDOW_SEC * HZ)
4418
iwl_mvm_count_mpdu(struct iwl_mvm_sta * mvm_sta,u8 fw_sta_id,u32 count,bool tx,int queue)4419 void iwl_mvm_count_mpdu(struct iwl_mvm_sta *mvm_sta, u8 fw_sta_id, u32 count,
4420 bool tx, int queue)
4421 {
4422 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvm_sta->vif);
4423 struct iwl_mvm *mvm = mvmvif->mvm;
4424 struct iwl_mvm_tpt_counter *queue_counter;
4425 struct iwl_mvm_mpdu_counter *link_counter;
4426 u32 total_mpdus = 0;
4427 int fw_link_id;
4428
4429 /* Count only for a BSS sta, and only when EMLSR is possible */
4430 if (!mvm_sta->mpdu_counters)
4431 return;
4432
4433 /* Map sta id to link id */
4434 fw_link_id = iwl_mvm_fw_sta_id_to_fw_link_id(mvmvif, fw_sta_id);
4435 if (fw_link_id < 0)
4436 return;
4437
4438 queue_counter = &mvm_sta->mpdu_counters[queue];
4439 link_counter = &queue_counter->per_link[fw_link_id];
4440
4441 spin_lock_bh(&queue_counter->lock);
4442
4443 if (tx)
4444 link_counter->tx += count;
4445 else
4446 link_counter->rx += count;
4447
4448 /*
4449 * When not in EMLSR, the window and the decision to enter EMLSR are
4450 * handled during counting, when in EMLSR - in the statistics flow
4451 */
4452 if (mvmvif->esr_active)
4453 goto out;
4454
4455 if (time_is_before_jiffies(queue_counter->window_start +
4456 IWL_MVM_TPT_COUNT_WINDOW)) {
4457 memset(queue_counter->per_link, 0,
4458 sizeof(queue_counter->per_link));
4459 queue_counter->window_start = jiffies;
4460
4461 IWL_DEBUG_INFO(mvm, "MPDU counters are cleared\n");
4462 }
4463
4464 for (int i = 0; i < IWL_FW_MAX_LINK_ID; i++)
4465 total_mpdus += tx ? queue_counter->per_link[i].tx :
4466 queue_counter->per_link[i].rx;
4467
4468 if (total_mpdus > IWL_MVM_ENTER_ESR_TPT_THRESH)
4469 wiphy_work_queue(mvmvif->mvm->hw->wiphy,
4470 &mvmvif->unblock_esr_tpt_wk);
4471
4472 out:
4473 spin_unlock_bh(&queue_counter->lock);
4474 }
4475