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